| /* |
| * fs/nfs/nfs4proc.c |
| * |
| * Client-side procedure declarations for NFSv4. |
| * |
| * Copyright (c) 2002 The Regents of the University of Michigan. |
| * All rights reserved. |
| * |
| * Kendrick Smith <kmsmith@umich.edu> |
| * Andy Adamson <andros@umich.edu> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <linux/mm.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/ratelimit.h> |
| #include <linux/printk.h> |
| #include <linux/slab.h> |
| #include <linux/sunrpc/clnt.h> |
| #include <linux/nfs.h> |
| #include <linux/nfs4.h> |
| #include <linux/nfs_fs.h> |
| #include <linux/nfs_page.h> |
| #include <linux/nfs_mount.h> |
| #include <linux/namei.h> |
| #include <linux/mount.h> |
| #include <linux/module.h> |
| #include <linux/nfs_idmap.h> |
| #include <linux/sunrpc/bc_xprt.h> |
| #include <linux/xattr.h> |
| #include <linux/utsname.h> |
| #include <linux/freezer.h> |
| |
| #include "nfs4_fs.h" |
| #include "delegation.h" |
| #include "internal.h" |
| #include "iostat.h" |
| #include "callback.h" |
| #include "pnfs.h" |
| #include "netns.h" |
| |
| #define NFSDBG_FACILITY NFSDBG_PROC |
| |
| #define NFS4_POLL_RETRY_MIN (HZ/10) |
| #define NFS4_POLL_RETRY_MAX (15*HZ) |
| |
| #define NFS4_MAX_LOOP_ON_RECOVER (10) |
| |
| struct nfs4_opendata; |
| static int _nfs4_proc_open(struct nfs4_opendata *data); |
| static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
| static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
| static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
| static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); |
| static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *); |
| static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
| static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, struct iattr *sattr, |
| struct nfs4_state *state); |
| #ifdef CONFIG_NFS_V4_1 |
| static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *); |
| static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *); |
| #endif |
| /* Prevent leaks of NFSv4 errors into userland */ |
| static int nfs4_map_errors(int err) |
| { |
| if (err >= -1000) |
| return err; |
| switch (err) { |
| case -NFS4ERR_RESOURCE: |
| return -EREMOTEIO; |
| case -NFS4ERR_WRONGSEC: |
| return -EPERM; |
| case -NFS4ERR_BADOWNER: |
| case -NFS4ERR_BADNAME: |
| return -EINVAL; |
| case -NFS4ERR_SHARE_DENIED: |
| return -EACCES; |
| case -NFS4ERR_MINOR_VERS_MISMATCH: |
| return -EPROTONOSUPPORT; |
| default: |
| dprintk("%s could not handle NFSv4 error %d\n", |
| __func__, -err); |
| break; |
| } |
| return -EIO; |
| } |
| |
| /* |
| * This is our standard bitmap for GETATTR requests. |
| */ |
| const u32 nfs4_fattr_bitmap[3] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_SIZE |
| | FATTR4_WORD0_FSID |
| | FATTR4_WORD0_FILEID, |
| FATTR4_WORD1_MODE |
| | FATTR4_WORD1_NUMLINKS |
| | FATTR4_WORD1_OWNER |
| | FATTR4_WORD1_OWNER_GROUP |
| | FATTR4_WORD1_RAWDEV |
| | FATTR4_WORD1_SPACE_USED |
| | FATTR4_WORD1_TIME_ACCESS |
| | FATTR4_WORD1_TIME_METADATA |
| | FATTR4_WORD1_TIME_MODIFY |
| }; |
| |
| static const u32 nfs4_pnfs_open_bitmap[3] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_SIZE |
| | FATTR4_WORD0_FSID |
| | FATTR4_WORD0_FILEID, |
| FATTR4_WORD1_MODE |
| | FATTR4_WORD1_NUMLINKS |
| | FATTR4_WORD1_OWNER |
| | FATTR4_WORD1_OWNER_GROUP |
| | FATTR4_WORD1_RAWDEV |
| | FATTR4_WORD1_SPACE_USED |
| | FATTR4_WORD1_TIME_ACCESS |
| | FATTR4_WORD1_TIME_METADATA |
| | FATTR4_WORD1_TIME_MODIFY, |
| FATTR4_WORD2_MDSTHRESHOLD |
| }; |
| |
| const u32 nfs4_statfs_bitmap[2] = { |
| FATTR4_WORD0_FILES_AVAIL |
| | FATTR4_WORD0_FILES_FREE |
| | FATTR4_WORD0_FILES_TOTAL, |
| FATTR4_WORD1_SPACE_AVAIL |
| | FATTR4_WORD1_SPACE_FREE |
| | FATTR4_WORD1_SPACE_TOTAL |
| }; |
| |
| const u32 nfs4_pathconf_bitmap[2] = { |
| FATTR4_WORD0_MAXLINK |
| | FATTR4_WORD0_MAXNAME, |
| 0 |
| }; |
| |
| const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE |
| | FATTR4_WORD0_MAXREAD |
| | FATTR4_WORD0_MAXWRITE |
| | FATTR4_WORD0_LEASE_TIME, |
| FATTR4_WORD1_TIME_DELTA |
| | FATTR4_WORD1_FS_LAYOUT_TYPES, |
| FATTR4_WORD2_LAYOUT_BLKSIZE |
| }; |
| |
| const u32 nfs4_fs_locations_bitmap[2] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_SIZE |
| | FATTR4_WORD0_FSID |
| | FATTR4_WORD0_FILEID |
| | FATTR4_WORD0_FS_LOCATIONS, |
| FATTR4_WORD1_MODE |
| | FATTR4_WORD1_NUMLINKS |
| | FATTR4_WORD1_OWNER |
| | FATTR4_WORD1_OWNER_GROUP |
| | FATTR4_WORD1_RAWDEV |
| | FATTR4_WORD1_SPACE_USED |
| | FATTR4_WORD1_TIME_ACCESS |
| | FATTR4_WORD1_TIME_METADATA |
| | FATTR4_WORD1_TIME_MODIFY |
| | FATTR4_WORD1_MOUNTED_ON_FILEID |
| }; |
| |
| static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
| struct nfs4_readdir_arg *readdir) |
| { |
| __be32 *start, *p; |
| |
| BUG_ON(readdir->count < 80); |
| if (cookie > 2) { |
| readdir->cookie = cookie; |
| memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
| return; |
| } |
| |
| readdir->cookie = 0; |
| memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
| if (cookie == 2) |
| return; |
| |
| /* |
| * NFSv4 servers do not return entries for '.' and '..' |
| * Therefore, we fake these entries here. We let '.' |
| * have cookie 0 and '..' have cookie 1. Note that |
| * when talking to the server, we always send cookie 0 |
| * instead of 1 or 2. |
| */ |
| start = p = kmap_atomic(*readdir->pages); |
| |
| if (cookie == 0) { |
| *p++ = xdr_one; /* next */ |
| *p++ = xdr_zero; /* cookie, first word */ |
| *p++ = xdr_one; /* cookie, second word */ |
| *p++ = xdr_one; /* entry len */ |
| memcpy(p, ".\0\0\0", 4); /* entry */ |
| p++; |
| *p++ = xdr_one; /* bitmap length */ |
| *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| *p++ = htonl(8); /* attribute buffer length */ |
| p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
| } |
| |
| *p++ = xdr_one; /* next */ |
| *p++ = xdr_zero; /* cookie, first word */ |
| *p++ = xdr_two; /* cookie, second word */ |
| *p++ = xdr_two; /* entry len */ |
| memcpy(p, "..\0\0", 4); /* entry */ |
| p++; |
| *p++ = xdr_one; /* bitmap length */ |
| *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| *p++ = htonl(8); /* attribute buffer length */ |
| p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
| |
| readdir->pgbase = (char *)p - (char *)start; |
| readdir->count -= readdir->pgbase; |
| kunmap_atomic(start); |
| } |
| |
| static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| { |
| int res; |
| |
| might_sleep(); |
| |
| res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| nfs_wait_bit_killable, TASK_KILLABLE); |
| if (res) |
| return res; |
| |
| if (clp->cl_cons_state < 0) |
| return clp->cl_cons_state; |
| return 0; |
| } |
| |
| static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| { |
| int res = 0; |
| |
| might_sleep(); |
| |
| if (*timeout <= 0) |
| *timeout = NFS4_POLL_RETRY_MIN; |
| if (*timeout > NFS4_POLL_RETRY_MAX) |
| *timeout = NFS4_POLL_RETRY_MAX; |
| freezable_schedule_timeout_killable(*timeout); |
| if (fatal_signal_pending(current)) |
| res = -ERESTARTSYS; |
| *timeout <<= 1; |
| return res; |
| } |
| |
| /* This is the error handling routine for processes that are allowed |
| * to sleep. |
| */ |
| static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
| { |
| struct nfs_client *clp = server->nfs_client; |
| struct nfs4_state *state = exception->state; |
| struct inode *inode = exception->inode; |
| int ret = errorcode; |
| |
| exception->retry = 0; |
| switch(errorcode) { |
| case 0: |
| return 0; |
| case -NFS4ERR_OPENMODE: |
| if (inode && nfs4_have_delegation(inode, FMODE_READ)) { |
| nfs4_inode_return_delegation(inode); |
| exception->retry = 1; |
| return 0; |
| } |
| if (state == NULL) |
| break; |
| nfs4_schedule_stateid_recovery(server, state); |
| goto wait_on_recovery; |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| if (state == NULL) |
| break; |
| nfs_remove_bad_delegation(state->inode); |
| nfs4_schedule_stateid_recovery(server, state); |
| goto wait_on_recovery; |
| case -NFS4ERR_EXPIRED: |
| if (state != NULL) |
| nfs4_schedule_stateid_recovery(server, state); |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_STALE_CLIENTID: |
| nfs4_schedule_lease_recovery(clp); |
| goto wait_on_recovery; |
| #if defined(CONFIG_NFS_V4_1) |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_DEADSESSION: |
| case -NFS4ERR_SEQ_FALSE_RETRY: |
| case -NFS4ERR_SEQ_MISORDERED: |
| dprintk("%s ERROR: %d Reset session\n", __func__, |
| errorcode); |
| nfs4_schedule_session_recovery(clp->cl_session, errorcode); |
| exception->retry = 1; |
| break; |
| #endif /* defined(CONFIG_NFS_V4_1) */ |
| case -NFS4ERR_FILE_OPEN: |
| if (exception->timeout > HZ) { |
| /* We have retried a decent amount, time to |
| * fail |
| */ |
| ret = -EBUSY; |
| break; |
| } |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| case -EKEYEXPIRED: |
| ret = nfs4_delay(server->client, &exception->timeout); |
| if (ret != 0) |
| break; |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| case -NFS4ERR_OLD_STATEID: |
| exception->retry = 1; |
| break; |
| case -NFS4ERR_BADOWNER: |
| /* The following works around a Linux server bug! */ |
| case -NFS4ERR_BADNAME: |
| if (server->caps & NFS_CAP_UIDGID_NOMAP) { |
| server->caps &= ~NFS_CAP_UIDGID_NOMAP; |
| exception->retry = 1; |
| printk(KERN_WARNING "NFS: v4 server %s " |
| "does not accept raw " |
| "uid/gids. " |
| "Reenabling the idmapper.\n", |
| server->nfs_client->cl_hostname); |
| } |
| } |
| /* We failed to handle the error */ |
| return nfs4_map_errors(ret); |
| wait_on_recovery: |
| ret = nfs4_wait_clnt_recover(clp); |
| if (ret == 0) |
| exception->retry = 1; |
| return ret; |
| } |
| |
| |
| static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
| { |
| spin_lock(&clp->cl_lock); |
| if (time_before(clp->cl_last_renewal,timestamp)) |
| clp->cl_last_renewal = timestamp; |
| spin_unlock(&clp->cl_lock); |
| } |
| |
| static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
| { |
| do_renew_lease(server->nfs_client, timestamp); |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| |
| /* |
| * nfs4_free_slot - free a slot and efficiently update slot table. |
| * |
| * freeing a slot is trivially done by clearing its respective bit |
| * in the bitmap. |
| * If the freed slotid equals highest_used_slotid we want to update it |
| * so that the server would be able to size down the slot table if needed, |
| * otherwise we know that the highest_used_slotid is still in use. |
| * When updating highest_used_slotid there may be "holes" in the bitmap |
| * so we need to scan down from highest_used_slotid to 0 looking for the now |
| * highest slotid in use. |
| * If none found, highest_used_slotid is set to NFS4_NO_SLOT. |
| * |
| * Must be called while holding tbl->slot_tbl_lock |
| */ |
| static void |
| nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid) |
| { |
| BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE); |
| /* clear used bit in bitmap */ |
| __clear_bit(slotid, tbl->used_slots); |
| |
| /* update highest_used_slotid when it is freed */ |
| if (slotid == tbl->highest_used_slotid) { |
| slotid = find_last_bit(tbl->used_slots, tbl->max_slots); |
| if (slotid < tbl->max_slots) |
| tbl->highest_used_slotid = slotid; |
| else |
| tbl->highest_used_slotid = NFS4_NO_SLOT; |
| } |
| dprintk("%s: slotid %u highest_used_slotid %d\n", __func__, |
| slotid, tbl->highest_used_slotid); |
| } |
| |
| bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy) |
| { |
| rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| return true; |
| } |
| |
| /* |
| * Signal state manager thread if session fore channel is drained |
| */ |
| static void nfs4_check_drain_fc_complete(struct nfs4_session *ses) |
| { |
| if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
| rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq, |
| nfs4_set_task_privileged, NULL); |
| return; |
| } |
| |
| if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT) |
| return; |
| |
| dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__); |
| complete(&ses->fc_slot_table.complete); |
| } |
| |
| /* |
| * Signal state manager thread if session back channel is drained |
| */ |
| void nfs4_check_drain_bc_complete(struct nfs4_session *ses) |
| { |
| if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) || |
| ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT) |
| return; |
| dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__); |
| complete(&ses->bc_slot_table.complete); |
| } |
| |
| static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
| { |
| struct nfs4_slot_table *tbl; |
| |
| tbl = &res->sr_session->fc_slot_table; |
| if (!res->sr_slot) { |
| /* just wake up the next guy waiting since |
| * we may have not consumed a slot after all */ |
| dprintk("%s: No slot\n", __func__); |
| return; |
| } |
| |
| spin_lock(&tbl->slot_tbl_lock); |
| nfs4_free_slot(tbl, res->sr_slot - tbl->slots); |
| nfs4_check_drain_fc_complete(res->sr_session); |
| spin_unlock(&tbl->slot_tbl_lock); |
| res->sr_slot = NULL; |
| } |
| |
| static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
| { |
| unsigned long timestamp; |
| struct nfs_client *clp; |
| |
| /* |
| * sr_status remains 1 if an RPC level error occurred. The server |
| * may or may not have processed the sequence operation.. |
| * Proceed as if the server received and processed the sequence |
| * operation. |
| */ |
| if (res->sr_status == 1) |
| res->sr_status = NFS_OK; |
| |
| /* don't increment the sequence number if the task wasn't sent */ |
| if (!RPC_WAS_SENT(task)) |
| goto out; |
| |
| /* Check the SEQUENCE operation status */ |
| switch (res->sr_status) { |
| case 0: |
| /* Update the slot's sequence and clientid lease timer */ |
| ++res->sr_slot->seq_nr; |
| timestamp = res->sr_renewal_time; |
| clp = res->sr_session->clp; |
| do_renew_lease(clp, timestamp); |
| /* Check sequence flags */ |
| if (res->sr_status_flags != 0) |
| nfs4_schedule_lease_recovery(clp); |
| break; |
| case -NFS4ERR_DELAY: |
| /* The server detected a resend of the RPC call and |
| * returned NFS4ERR_DELAY as per Section 2.10.6.2 |
| * of RFC5661. |
| */ |
| dprintk("%s: slot=%td seq=%d: Operation in progress\n", |
| __func__, |
| res->sr_slot - res->sr_session->fc_slot_table.slots, |
| res->sr_slot->seq_nr); |
| goto out_retry; |
| default: |
| /* Just update the slot sequence no. */ |
| ++res->sr_slot->seq_nr; |
| } |
| out: |
| /* The session may be reset by one of the error handlers. */ |
| dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); |
| nfs41_sequence_free_slot(res); |
| return 1; |
| out_retry: |
| if (!rpc_restart_call(task)) |
| goto out; |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| return 0; |
| } |
| |
| static int nfs4_sequence_done(struct rpc_task *task, |
| struct nfs4_sequence_res *res) |
| { |
| if (res->sr_session == NULL) |
| return 1; |
| return nfs41_sequence_done(task, res); |
| } |
| |
| /* |
| * nfs4_find_slot - efficiently look for a free slot |
| * |
| * nfs4_find_slot looks for an unset bit in the used_slots bitmap. |
| * If found, we mark the slot as used, update the highest_used_slotid, |
| * and respectively set up the sequence operation args. |
| * The slot number is returned if found, or NFS4_NO_SLOT otherwise. |
| * |
| * Note: must be called with under the slot_tbl_lock. |
| */ |
| static u32 |
| nfs4_find_slot(struct nfs4_slot_table *tbl) |
| { |
| u32 slotid; |
| u32 ret_id = NFS4_NO_SLOT; |
| |
| dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n", |
| __func__, tbl->used_slots[0], tbl->highest_used_slotid, |
| tbl->max_slots); |
| slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); |
| if (slotid >= tbl->max_slots) |
| goto out; |
| __set_bit(slotid, tbl->used_slots); |
| if (slotid > tbl->highest_used_slotid || |
| tbl->highest_used_slotid == NFS4_NO_SLOT) |
| tbl->highest_used_slotid = slotid; |
| ret_id = slotid; |
| out: |
| dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", |
| __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); |
| return ret_id; |
| } |
| |
| static void nfs41_init_sequence(struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, int cache_reply) |
| { |
| args->sa_session = NULL; |
| args->sa_cache_this = 0; |
| if (cache_reply) |
| args->sa_cache_this = 1; |
| res->sr_session = NULL; |
| res->sr_slot = NULL; |
| } |
| |
| int nfs41_setup_sequence(struct nfs4_session *session, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task) |
| { |
| struct nfs4_slot *slot; |
| struct nfs4_slot_table *tbl; |
| u32 slotid; |
| |
| dprintk("--> %s\n", __func__); |
| /* slot already allocated? */ |
| if (res->sr_slot != NULL) |
| return 0; |
| |
| tbl = &session->fc_slot_table; |
| |
| spin_lock(&tbl->slot_tbl_lock); |
| if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && |
| !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
| /* The state manager will wait until the slot table is empty */ |
| rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| spin_unlock(&tbl->slot_tbl_lock); |
| dprintk("%s session is draining\n", __func__); |
| return -EAGAIN; |
| } |
| |
| if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
| !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
| rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| spin_unlock(&tbl->slot_tbl_lock); |
| dprintk("%s enforce FIFO order\n", __func__); |
| return -EAGAIN; |
| } |
| |
| slotid = nfs4_find_slot(tbl); |
| if (slotid == NFS4_NO_SLOT) { |
| rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| spin_unlock(&tbl->slot_tbl_lock); |
| dprintk("<-- %s: no free slots\n", __func__); |
| return -EAGAIN; |
| } |
| spin_unlock(&tbl->slot_tbl_lock); |
| |
| rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
| slot = tbl->slots + slotid; |
| args->sa_session = session; |
| args->sa_slotid = slotid; |
| |
| dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); |
| |
| res->sr_session = session; |
| res->sr_slot = slot; |
| res->sr_renewal_time = jiffies; |
| res->sr_status_flags = 0; |
| /* |
| * sr_status is only set in decode_sequence, and so will remain |
| * set to 1 if an rpc level failure occurs. |
| */ |
| res->sr_status = 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nfs41_setup_sequence); |
| |
| int nfs4_setup_sequence(const struct nfs_server *server, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task) |
| { |
| struct nfs4_session *session = nfs4_get_session(server); |
| int ret = 0; |
| |
| if (session == NULL) |
| goto out; |
| |
| dprintk("--> %s clp %p session %p sr_slot %td\n", |
| __func__, session->clp, session, res->sr_slot ? |
| res->sr_slot - session->fc_slot_table.slots : -1); |
| |
| ret = nfs41_setup_sequence(session, args, res, task); |
| out: |
| dprintk("<-- %s status=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| struct nfs41_call_sync_data { |
| const struct nfs_server *seq_server; |
| struct nfs4_sequence_args *seq_args; |
| struct nfs4_sequence_res *seq_res; |
| }; |
| |
| static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs41_call_sync_data *data = calldata; |
| |
| dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
| |
| if (nfs4_setup_sequence(data->seq_server, data->seq_args, |
| data->seq_res, task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
| { |
| rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| nfs41_call_sync_prepare(task, calldata); |
| } |
| |
| static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs41_call_sync_data *data = calldata; |
| |
| nfs41_sequence_done(task, data->seq_res); |
| } |
| |
| static const struct rpc_call_ops nfs41_call_sync_ops = { |
| .rpc_call_prepare = nfs41_call_sync_prepare, |
| .rpc_call_done = nfs41_call_sync_done, |
| }; |
| |
| static const struct rpc_call_ops nfs41_call_priv_sync_ops = { |
| .rpc_call_prepare = nfs41_call_priv_sync_prepare, |
| .rpc_call_done = nfs41_call_sync_done, |
| }; |
| |
| static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, |
| struct nfs_server *server, |
| struct rpc_message *msg, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| int privileged) |
| { |
| int ret; |
| struct rpc_task *task; |
| struct nfs41_call_sync_data data = { |
| .seq_server = server, |
| .seq_args = args, |
| .seq_res = res, |
| }; |
| struct rpc_task_setup task_setup = { |
| .rpc_client = clnt, |
| .rpc_message = msg, |
| .callback_ops = &nfs41_call_sync_ops, |
| .callback_data = &data |
| }; |
| |
| if (privileged) |
| task_setup.callback_ops = &nfs41_call_priv_sync_ops; |
| task = rpc_run_task(&task_setup); |
| if (IS_ERR(task)) |
| ret = PTR_ERR(task); |
| else { |
| ret = task->tk_status; |
| rpc_put_task(task); |
| } |
| return ret; |
| } |
| |
| int _nfs4_call_sync_session(struct rpc_clnt *clnt, |
| struct nfs_server *server, |
| struct rpc_message *msg, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| int cache_reply) |
| { |
| nfs41_init_sequence(args, res, cache_reply); |
| return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0); |
| } |
| |
| #else |
| static inline |
| void nfs41_init_sequence(struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, int cache_reply) |
| { |
| } |
| |
| static int nfs4_sequence_done(struct rpc_task *task, |
| struct nfs4_sequence_res *res) |
| { |
| return 1; |
| } |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| int _nfs4_call_sync(struct rpc_clnt *clnt, |
| struct nfs_server *server, |
| struct rpc_message *msg, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| int cache_reply) |
| { |
| nfs41_init_sequence(args, res, cache_reply); |
| return rpc_call_sync(clnt, msg, 0); |
| } |
| |
| static inline |
| int nfs4_call_sync(struct rpc_clnt *clnt, |
| struct nfs_server *server, |
| struct rpc_message *msg, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| int cache_reply) |
| { |
| return server->nfs_client->cl_mvops->call_sync(clnt, server, msg, |
| args, res, cache_reply); |
| } |
| |
| static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
| { |
| struct nfs_inode *nfsi = NFS_I(dir); |
| |
| spin_lock(&dir->i_lock); |
| nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| if (!cinfo->atomic || cinfo->before != dir->i_version) |
| nfs_force_lookup_revalidate(dir); |
| dir->i_version = cinfo->after; |
| spin_unlock(&dir->i_lock); |
| } |
| |
| struct nfs4_opendata { |
| struct kref kref; |
| struct nfs_openargs o_arg; |
| struct nfs_openres o_res; |
| struct nfs_open_confirmargs c_arg; |
| struct nfs_open_confirmres c_res; |
| struct nfs4_string owner_name; |
| struct nfs4_string group_name; |
| struct nfs_fattr f_attr; |
| struct dentry *dir; |
| struct dentry *dentry; |
| struct nfs4_state_owner *owner; |
| struct nfs4_state *state; |
| struct iattr attrs; |
| unsigned long timestamp; |
| unsigned int rpc_done : 1; |
| int rpc_status; |
| int cancelled; |
| }; |
| |
| |
| static void nfs4_init_opendata_res(struct nfs4_opendata *p) |
| { |
| p->o_res.f_attr = &p->f_attr; |
| p->o_res.seqid = p->o_arg.seqid; |
| p->c_res.seqid = p->c_arg.seqid; |
| p->o_res.server = p->o_arg.server; |
| nfs_fattr_init(&p->f_attr); |
| nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); |
| } |
| |
| static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, |
| struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
| const struct iattr *attrs, |
| gfp_t gfp_mask) |
| { |
| struct dentry *parent = dget_parent(dentry); |
| struct inode *dir = parent->d_inode; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs4_opendata *p; |
| |
| p = kzalloc(sizeof(*p), gfp_mask); |
| if (p == NULL) |
| goto err; |
| p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); |
| if (p->o_arg.seqid == NULL) |
| goto err_free; |
| nfs_sb_active(dentry->d_sb); |
| p->dentry = dget(dentry); |
| p->dir = parent; |
| p->owner = sp; |
| atomic_inc(&sp->so_count); |
| p->o_arg.fh = NFS_FH(dir); |
| p->o_arg.open_flags = flags; |
| p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); |
| p->o_arg.clientid = server->nfs_client->cl_clientid; |
| p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); |
| p->o_arg.id.uniquifier = sp->so_seqid.owner_id; |
| p->o_arg.name = &dentry->d_name; |
| p->o_arg.server = server; |
| p->o_arg.bitmask = server->attr_bitmask; |
| p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; |
| p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; |
| if (attrs != NULL && attrs->ia_valid != 0) { |
| __be32 verf[2]; |
| |
| p->o_arg.u.attrs = &p->attrs; |
| memcpy(&p->attrs, attrs, sizeof(p->attrs)); |
| |
| verf[0] = jiffies; |
| verf[1] = current->pid; |
| memcpy(p->o_arg.u.verifier.data, verf, |
| sizeof(p->o_arg.u.verifier.data)); |
| } |
| p->c_arg.fh = &p->o_res.fh; |
| p->c_arg.stateid = &p->o_res.stateid; |
| p->c_arg.seqid = p->o_arg.seqid; |
| nfs4_init_opendata_res(p); |
| kref_init(&p->kref); |
| return p; |
| err_free: |
| kfree(p); |
| err: |
| dput(parent); |
| return NULL; |
| } |
| |
| static void nfs4_opendata_free(struct kref *kref) |
| { |
| struct nfs4_opendata *p = container_of(kref, |
| struct nfs4_opendata, kref); |
| struct super_block *sb = p->dentry->d_sb; |
| |
| nfs_free_seqid(p->o_arg.seqid); |
| if (p->state != NULL) |
| nfs4_put_open_state(p->state); |
| nfs4_put_state_owner(p->owner); |
| dput(p->dir); |
| dput(p->dentry); |
| nfs_sb_deactive(sb); |
| nfs_fattr_free_names(&p->f_attr); |
| kfree(p); |
| } |
| |
| static void nfs4_opendata_put(struct nfs4_opendata *p) |
| { |
| if (p != NULL) |
| kref_put(&p->kref, nfs4_opendata_free); |
| } |
| |
| static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
| { |
| int ret; |
| |
| ret = rpc_wait_for_completion_task(task); |
| return ret; |
| } |
| |
| static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
| { |
| int ret = 0; |
| |
| if (open_mode & (O_EXCL|O_TRUNC)) |
| goto out; |
| switch (mode & (FMODE_READ|FMODE_WRITE)) { |
| case FMODE_READ: |
| ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
| && state->n_rdonly != 0; |
| break; |
| case FMODE_WRITE: |
| ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
| && state->n_wronly != 0; |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
| && state->n_rdwr != 0; |
| } |
| out: |
| return ret; |
| } |
| |
| static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
| { |
| if (delegation == NULL) |
| return 0; |
| if ((delegation->type & fmode) != fmode) |
| return 0; |
| if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
| return 0; |
| nfs_mark_delegation_referenced(delegation); |
| return 1; |
| } |
| |
| static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
| { |
| switch (fmode) { |
| case FMODE_WRITE: |
| state->n_wronly++; |
| break; |
| case FMODE_READ: |
| state->n_rdonly++; |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| state->n_rdwr++; |
| } |
| nfs4_state_set_mode_locked(state, state->state | fmode); |
| } |
| |
| static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| { |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| nfs4_stateid_copy(&state->stateid, stateid); |
| nfs4_stateid_copy(&state->open_stateid, stateid); |
| switch (fmode) { |
| case FMODE_READ: |
| set_bit(NFS_O_RDONLY_STATE, &state->flags); |
| break; |
| case FMODE_WRITE: |
| set_bit(NFS_O_WRONLY_STATE, &state->flags); |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| set_bit(NFS_O_RDWR_STATE, &state->flags); |
| } |
| } |
| |
| static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| { |
| write_seqlock(&state->seqlock); |
| nfs_set_open_stateid_locked(state, stateid, fmode); |
| write_sequnlock(&state->seqlock); |
| } |
| |
| static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
| { |
| /* |
| * Protect the call to nfs4_state_set_mode_locked and |
| * serialise the stateid update |
| */ |
| write_seqlock(&state->seqlock); |
| if (deleg_stateid != NULL) { |
| nfs4_stateid_copy(&state->stateid, deleg_stateid); |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| } |
| if (open_stateid != NULL) |
| nfs_set_open_stateid_locked(state, open_stateid, fmode); |
| write_sequnlock(&state->seqlock); |
| spin_lock(&state->owner->so_lock); |
| update_open_stateflags(state, fmode); |
| spin_unlock(&state->owner->so_lock); |
| } |
| |
| static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_delegation *deleg_cur; |
| int ret = 0; |
| |
| fmode &= (FMODE_READ|FMODE_WRITE); |
| |
| rcu_read_lock(); |
| deleg_cur = rcu_dereference(nfsi->delegation); |
| if (deleg_cur == NULL) |
| goto no_delegation; |
| |
| spin_lock(&deleg_cur->lock); |
| if (nfsi->delegation != deleg_cur || |
| (deleg_cur->type & fmode) != fmode) |
| goto no_delegation_unlock; |
| |
| if (delegation == NULL) |
| delegation = &deleg_cur->stateid; |
| else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) |
| goto no_delegation_unlock; |
| |
| nfs_mark_delegation_referenced(deleg_cur); |
| __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
| ret = 1; |
| no_delegation_unlock: |
| spin_unlock(&deleg_cur->lock); |
| no_delegation: |
| rcu_read_unlock(); |
| |
| if (!ret && open_stateid != NULL) { |
| __update_open_stateid(state, open_stateid, NULL, fmode); |
| ret = 1; |
| } |
| |
| return ret; |
| } |
| |
| |
| static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
| { |
| struct nfs_delegation *delegation; |
| |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(inode)->delegation); |
| if (delegation == NULL || (delegation->type & fmode) == fmode) { |
| rcu_read_unlock(); |
| return; |
| } |
| rcu_read_unlock(); |
| nfs4_inode_return_delegation(inode); |
| } |
| |
| static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
| { |
| struct nfs4_state *state = opendata->state; |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_delegation *delegation; |
| int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC); |
| fmode_t fmode = opendata->o_arg.fmode; |
| nfs4_stateid stateid; |
| int ret = -EAGAIN; |
| |
| for (;;) { |
| if (can_open_cached(state, fmode, open_mode)) { |
| spin_lock(&state->owner->so_lock); |
| if (can_open_cached(state, fmode, open_mode)) { |
| update_open_stateflags(state, fmode); |
| spin_unlock(&state->owner->so_lock); |
| goto out_return_state; |
| } |
| spin_unlock(&state->owner->so_lock); |
| } |
| rcu_read_lock(); |
| delegation = rcu_dereference(nfsi->delegation); |
| if (!can_open_delegated(delegation, fmode)) { |
| rcu_read_unlock(); |
| break; |
| } |
| /* Save the delegation */ |
| nfs4_stateid_copy(&stateid, &delegation->stateid); |
| rcu_read_unlock(); |
| ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
| if (ret != 0) |
| goto out; |
| ret = -EAGAIN; |
| |
| /* Try to update the stateid using the delegation */ |
| if (update_open_stateid(state, NULL, &stateid, fmode)) |
| goto out_return_state; |
| } |
| out: |
| return ERR_PTR(ret); |
| out_return_state: |
| atomic_inc(&state->count); |
| return state; |
| } |
| |
| static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
| { |
| struct inode *inode; |
| struct nfs4_state *state = NULL; |
| struct nfs_delegation *delegation; |
| int ret; |
| |
| if (!data->rpc_done) { |
| state = nfs4_try_open_cached(data); |
| goto out; |
| } |
| |
| ret = -EAGAIN; |
| if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
| goto err; |
| inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
| ret = PTR_ERR(inode); |
| if (IS_ERR(inode)) |
| goto err; |
| ret = -ENOMEM; |
| state = nfs4_get_open_state(inode, data->owner); |
| if (state == NULL) |
| goto err_put_inode; |
| if (data->o_res.delegation_type != 0) { |
| struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| int delegation_flags = 0; |
| |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(inode)->delegation); |
| if (delegation) |
| delegation_flags = delegation->flags; |
| rcu_read_unlock(); |
| if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { |
| pr_err_ratelimited("NFS: Broken NFSv4 server %s is " |
| "returning a delegation for " |
| "OPEN(CLAIM_DELEGATE_CUR)\n", |
| clp->cl_hostname); |
| } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
| nfs_inode_set_delegation(state->inode, |
| data->owner->so_cred, |
| &data->o_res); |
| else |
| nfs_inode_reclaim_delegation(state->inode, |
| data->owner->so_cred, |
| &data->o_res); |
| } |
| |
| update_open_stateid(state, &data->o_res.stateid, NULL, |
| data->o_arg.fmode); |
| iput(inode); |
| out: |
| return state; |
| err_put_inode: |
| iput(inode); |
| err: |
| return ERR_PTR(ret); |
| } |
| |
| static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_open_context *ctx; |
| |
| spin_lock(&state->inode->i_lock); |
| list_for_each_entry(ctx, &nfsi->open_files, list) { |
| if (ctx->state != state) |
| continue; |
| get_nfs_open_context(ctx); |
| spin_unlock(&state->inode->i_lock); |
| return ctx; |
| } |
| spin_unlock(&state->inode->i_lock); |
| return ERR_PTR(-ENOENT); |
| } |
| |
| static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs4_opendata *opendata; |
| |
| opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS); |
| if (opendata == NULL) |
| return ERR_PTR(-ENOMEM); |
| opendata->state = state; |
| atomic_inc(&state->count); |
| return opendata; |
| } |
| |
| static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
| { |
| struct nfs4_state *newstate; |
| int ret; |
| |
| opendata->o_arg.open_flags = 0; |
| opendata->o_arg.fmode = fmode; |
| memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
| memset(&opendata->c_res, 0, sizeof(opendata->c_res)); |
| nfs4_init_opendata_res(opendata); |
| ret = _nfs4_recover_proc_open(opendata); |
| if (ret != 0) |
| return ret; |
| newstate = nfs4_opendata_to_nfs4_state(opendata); |
| if (IS_ERR(newstate)) |
| return PTR_ERR(newstate); |
| nfs4_close_state(newstate, fmode); |
| *res = newstate; |
| return 0; |
| } |
| |
| static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) |
| { |
| struct nfs4_state *newstate; |
| int ret; |
| |
| /* memory barrier prior to reading state->n_* */ |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| smp_rmb(); |
| if (state->n_rdwr != 0) { |
| clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
| if (ret != 0) |
| return ret; |
| if (newstate != state) |
| return -ESTALE; |
| } |
| if (state->n_wronly != 0) { |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
| if (ret != 0) |
| return ret; |
| if (newstate != state) |
| return -ESTALE; |
| } |
| if (state->n_rdonly != 0) { |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
| if (ret != 0) |
| return ret; |
| if (newstate != state) |
| return -ESTALE; |
| } |
| /* |
| * We may have performed cached opens for all three recoveries. |
| * Check if we need to update the current stateid. |
| */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && |
| !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { |
| write_seqlock(&state->seqlock); |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| nfs4_stateid_copy(&state->stateid, &state->open_stateid); |
| write_sequnlock(&state->seqlock); |
| } |
| return 0; |
| } |
| |
| /* |
| * OPEN_RECLAIM: |
| * reclaim state on the server after a reboot. |
| */ |
| static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs_delegation *delegation; |
| struct nfs4_opendata *opendata; |
| fmode_t delegation_type = 0; |
| int status; |
| |
| opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| if (IS_ERR(opendata)) |
| return PTR_ERR(opendata); |
| opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
| opendata->o_arg.fh = NFS_FH(state->inode); |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
| if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
| delegation_type = delegation->type; |
| rcu_read_unlock(); |
| opendata->o_arg.u.delegation_type = delegation_type; |
| status = nfs4_open_recover(opendata, state); |
| nfs4_opendata_put(opendata); |
| return status; |
| } |
| |
| static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_do_open_reclaim(ctx, state); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct nfs_open_context *ctx; |
| int ret; |
| |
| ctx = nfs4_state_find_open_context(state); |
| if (IS_ERR(ctx)) |
| return PTR_ERR(ctx); |
| ret = nfs4_do_open_reclaim(ctx, state); |
| put_nfs_open_context(ctx); |
| return ret; |
| } |
| |
| static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
| { |
| struct nfs4_opendata *opendata; |
| int ret; |
| |
| opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| if (IS_ERR(opendata)) |
| return PTR_ERR(opendata); |
| opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
| nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); |
| ret = nfs4_open_recover(opendata, state); |
| nfs4_opendata_put(opendata); |
| return ret; |
| } |
| |
| int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| int err; |
| do { |
| err = _nfs4_open_delegation_recall(ctx, state, stateid); |
| switch (err) { |
| case 0: |
| case -ENOENT: |
| case -ESTALE: |
| goto out; |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_DEADSESSION: |
| nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); |
| goto out; |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| /* Don't recall a delegation if it was lost */ |
| nfs4_schedule_lease_recovery(server->nfs_client); |
| goto out; |
| case -ERESTARTSYS: |
| /* |
| * The show must go on: exit, but mark the |
| * stateid as needing recovery. |
| */ |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| nfs_inode_find_state_and_recover(state->inode, |
| stateid); |
| nfs4_schedule_stateid_recovery(server, state); |
| case -EKEYEXPIRED: |
| /* |
| * User RPCSEC_GSS context has expired. |
| * We cannot recover this stateid now, so |
| * skip it and allow recovery thread to |
| * proceed. |
| */ |
| case -ENOMEM: |
| err = 0; |
| goto out; |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| |
| data->rpc_status = task->tk_status; |
| if (data->rpc_status == 0) { |
| nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); |
| nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| renew_lease(data->o_res.server, data->timestamp); |
| data->rpc_done = 1; |
| } |
| } |
| |
| static void nfs4_open_confirm_release(void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| struct nfs4_state *state = NULL; |
| |
| /* If this request hasn't been cancelled, do nothing */ |
| if (data->cancelled == 0) |
| goto out_free; |
| /* In case of error, no cleanup! */ |
| if (!data->rpc_done) |
| goto out_free; |
| state = nfs4_opendata_to_nfs4_state(data); |
| if (!IS_ERR(state)) |
| nfs4_close_state(state, data->o_arg.fmode); |
| out_free: |
| nfs4_opendata_put(data); |
| } |
| |
| static const struct rpc_call_ops nfs4_open_confirm_ops = { |
| .rpc_call_done = nfs4_open_confirm_done, |
| .rpc_release = nfs4_open_confirm_release, |
| }; |
| |
| /* |
| * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata |
| */ |
| static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) |
| { |
| struct nfs_server *server = NFS_SERVER(data->dir->d_inode); |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| .rpc_argp = &data->c_arg, |
| .rpc_resp = &data->c_res, |
| .rpc_cred = data->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_open_confirm_ops, |
| .callback_data = data, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status; |
| |
| kref_get(&data->kref); |
| data->rpc_done = 0; |
| data->rpc_status = 0; |
| data->timestamp = jiffies; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) { |
| data->cancelled = 1; |
| smp_wmb(); |
| } else |
| status = data->rpc_status; |
| rpc_put_task(task); |
| return status; |
| } |
| |
| static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| struct nfs4_state_owner *sp = data->owner; |
| |
| if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
| return; |
| /* |
| * Check if we still need to send an OPEN call, or if we can use |
| * a delegation instead. |
| */ |
| if (data->state != NULL) { |
| struct nfs_delegation *delegation; |
| |
| if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
| goto out_no_action; |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); |
| if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && |
| can_open_delegated(delegation, data->o_arg.fmode)) |
| goto unlock_no_action; |
| rcu_read_unlock(); |
| } |
| /* Update client id. */ |
| data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; |
| if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
| task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
| nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
| } |
| data->timestamp = jiffies; |
| if (nfs4_setup_sequence(data->o_arg.server, |
| &data->o_arg.seq_args, |
| &data->o_res.seq_res, task)) |
| return; |
| rpc_call_start(task); |
| return; |
| unlock_no_action: |
| rcu_read_unlock(); |
| out_no_action: |
| task->tk_action = NULL; |
| |
| } |
| |
| static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
| { |
| rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| nfs4_open_prepare(task, calldata); |
| } |
| |
| static void nfs4_open_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| |
| data->rpc_status = task->tk_status; |
| |
| if (!nfs4_sequence_done(task, &data->o_res.seq_res)) |
| return; |
| |
| if (task->tk_status == 0) { |
| switch (data->o_res.f_attr->mode & S_IFMT) { |
| case S_IFREG: |
| break; |
| case S_IFLNK: |
| data->rpc_status = -ELOOP; |
| break; |
| case S_IFDIR: |
| data->rpc_status = -EISDIR; |
| break; |
| default: |
| data->rpc_status = -ENOTDIR; |
| } |
| renew_lease(data->o_res.server, data->timestamp); |
| if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
| nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| } |
| data->rpc_done = 1; |
| } |
| |
| static void nfs4_open_release(void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| struct nfs4_state *state = NULL; |
| |
| /* If this request hasn't been cancelled, do nothing */ |
| if (data->cancelled == 0) |
| goto out_free; |
| /* In case of error, no cleanup! */ |
| if (data->rpc_status != 0 || !data->rpc_done) |
| goto out_free; |
| /* In case we need an open_confirm, no cleanup! */ |
| if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) |
| goto out_free; |
| state = nfs4_opendata_to_nfs4_state(data); |
| if (!IS_ERR(state)) |
| nfs4_close_state(state, data->o_arg.fmode); |
| out_free: |
| nfs4_opendata_put(data); |
| } |
| |
| static const struct rpc_call_ops nfs4_open_ops = { |
| .rpc_call_prepare = nfs4_open_prepare, |
| .rpc_call_done = nfs4_open_done, |
| .rpc_release = nfs4_open_release, |
| }; |
| |
| static const struct rpc_call_ops nfs4_recover_open_ops = { |
| .rpc_call_prepare = nfs4_recover_open_prepare, |
| .rpc_call_done = nfs4_open_done, |
| .rpc_release = nfs4_open_release, |
| }; |
| |
| static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) |
| { |
| struct inode *dir = data->dir->d_inode; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_openargs *o_arg = &data->o_arg; |
| struct nfs_openres *o_res = &data->o_res; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
| .rpc_argp = o_arg, |
| .rpc_resp = o_res, |
| .rpc_cred = data->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_open_ops, |
| .callback_data = data, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status; |
| |
| nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); |
| kref_get(&data->kref); |
| data->rpc_done = 0; |
| data->rpc_status = 0; |
| data->cancelled = 0; |
| if (isrecover) |
| task_setup_data.callback_ops = &nfs4_recover_open_ops; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) { |
| data->cancelled = 1; |
| smp_wmb(); |
| } else |
| status = data->rpc_status; |
| rpc_put_task(task); |
| |
| return status; |
| } |
| |
| static int _nfs4_recover_proc_open(struct nfs4_opendata *data) |
| { |
| struct inode *dir = data->dir->d_inode; |
| struct nfs_openres *o_res = &data->o_res; |
| int status; |
| |
| status = nfs4_run_open_task(data, 1); |
| if (status != 0 || !data->rpc_done) |
| return status; |
| |
| nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); |
| |
| if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| status = _nfs4_proc_open_confirm(data); |
| if (status != 0) |
| return status; |
| } |
| |
| return status; |
| } |
| |
| /* |
| * Note: On error, nfs4_proc_open will free the struct nfs4_opendata |
| */ |
| static int _nfs4_proc_open(struct nfs4_opendata *data) |
| { |
| struct inode *dir = data->dir->d_inode; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_openargs *o_arg = &data->o_arg; |
| struct nfs_openres *o_res = &data->o_res; |
| int status; |
| |
| status = nfs4_run_open_task(data, 0); |
| if (!data->rpc_done) |
| return status; |
| if (status != 0) { |
| if (status == -NFS4ERR_BADNAME && |
| !(o_arg->open_flags & O_CREAT)) |
| return -ENOENT; |
| return status; |
| } |
| |
| nfs_fattr_map_and_free_names(server, &data->f_attr); |
| |
| if (o_arg->open_flags & O_CREAT) |
| update_changeattr(dir, &o_res->cinfo); |
| if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
| server->caps &= ~NFS_CAP_POSIX_LOCK; |
| if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| status = _nfs4_proc_open_confirm(data); |
| if (status != 0) |
| return status; |
| } |
| if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
| _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
| return 0; |
| } |
| |
| static int nfs4_client_recover_expired_lease(struct nfs_client *clp) |
| { |
| unsigned int loop; |
| int ret; |
| |
| for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| ret = nfs4_wait_clnt_recover(clp); |
| if (ret != 0) |
| break; |
| if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| break; |
| nfs4_schedule_state_manager(clp); |
| ret = -EIO; |
| } |
| return ret; |
| } |
| |
| static int nfs4_recover_expired_lease(struct nfs_server *server) |
| { |
| return nfs4_client_recover_expired_lease(server->nfs_client); |
| } |
| |
| /* |
| * OPEN_EXPIRED: |
| * reclaim state on the server after a network partition. |
| * Assumes caller holds the appropriate lock |
| */ |
| static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs4_opendata *opendata; |
| int ret; |
| |
| opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| if (IS_ERR(opendata)) |
| return PTR_ERR(opendata); |
| ret = nfs4_open_recover(opendata, state); |
| if (ret == -ESTALE) |
| d_drop(ctx->dentry); |
| nfs4_opendata_put(opendata); |
| return ret; |
| } |
| |
| static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = _nfs4_open_expired(ctx, state); |
| switch (err) { |
| default: |
| goto out; |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| nfs4_handle_exception(server, err, &exception); |
| err = 0; |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct nfs_open_context *ctx; |
| int ret; |
| |
| ctx = nfs4_state_find_open_context(state); |
| if (IS_ERR(ctx)) |
| return PTR_ERR(ctx); |
| ret = nfs4_do_open_expired(ctx, state); |
| put_nfs_open_context(ctx); |
| return ret; |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static void nfs41_clear_delegation_stateid(struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| nfs4_stateid *stateid = &state->stateid; |
| int status; |
| |
| /* If a state reset has been done, test_stateid is unneeded */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| return; |
| |
| status = nfs41_test_stateid(server, stateid); |
| if (status != NFS_OK) { |
| /* Free the stateid unless the server explicitly |
| * informs us the stateid is unrecognized. */ |
| if (status != -NFS4ERR_BAD_STATEID) |
| nfs41_free_stateid(server, stateid); |
| |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| } |
| } |
| |
| /** |
| * nfs41_check_open_stateid - possibly free an open stateid |
| * |
| * @state: NFSv4 state for an inode |
| * |
| * Returns NFS_OK if recovery for this stateid is now finished. |
| * Otherwise a negative NFS4ERR value is returned. |
| */ |
| static int nfs41_check_open_stateid(struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| nfs4_stateid *stateid = &state->stateid; |
| int status; |
| |
| /* If a state reset has been done, test_stateid is unneeded */ |
| if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && |
| (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && |
| (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) |
| return -NFS4ERR_BAD_STATEID; |
| |
| status = nfs41_test_stateid(server, stateid); |
| if (status != NFS_OK) { |
| /* Free the stateid unless the server explicitly |
| * informs us the stateid is unrecognized. */ |
| if (status != -NFS4ERR_BAD_STATEID) |
| nfs41_free_stateid(server, stateid); |
| |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| } |
| return status; |
| } |
| |
| static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| int status; |
| |
| nfs41_clear_delegation_stateid(state); |
| status = nfs41_check_open_stateid(state); |
| if (status != NFS_OK) |
| status = nfs4_open_expired(sp, state); |
| return status; |
| } |
| #endif |
| |
| /* |
| * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* |
| * fields corresponding to attributes that were used to store the verifier. |
| * Make sure we clobber those fields in the later setattr call |
| */ |
| static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) |
| { |
| if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && |
| !(sattr->ia_valid & ATTR_ATIME_SET)) |
| sattr->ia_valid |= ATTR_ATIME; |
| |
| if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && |
| !(sattr->ia_valid & ATTR_MTIME_SET)) |
| sattr->ia_valid |= ATTR_MTIME; |
| } |
| |
| /* |
| * Returns a referenced nfs4_state |
| */ |
| static int _nfs4_do_open(struct inode *dir, |
| struct dentry *dentry, |
| fmode_t fmode, |
| int flags, |
| struct iattr *sattr, |
| struct rpc_cred *cred, |
| struct nfs4_state **res, |
| struct nfs4_threshold **ctx_th) |
| { |
| struct nfs4_state_owner *sp; |
| struct nfs4_state *state = NULL; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs4_opendata *opendata; |
| int status; |
| |
| /* Protect against reboot recovery conflicts */ |
| status = -ENOMEM; |
| sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); |
| if (sp == NULL) { |
| dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| goto out_err; |
| } |
| status = nfs4_recover_expired_lease(server); |
| if (status != 0) |
| goto err_put_state_owner; |
| if (dentry->d_inode != NULL) |
| nfs4_return_incompatible_delegation(dentry->d_inode, fmode); |
| status = -ENOMEM; |
| opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL); |
| if (opendata == NULL) |
| goto err_put_state_owner; |
| |
| if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { |
| opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); |
| if (!opendata->f_attr.mdsthreshold) |
| goto err_opendata_put; |
| opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; |
| } |
| if (dentry->d_inode != NULL) |
| opendata->state = nfs4_get_open_state(dentry->d_inode, sp); |
| |
| status = _nfs4_proc_open(opendata); |
| if (status != 0) |
| goto err_opendata_put; |
| |
| state = nfs4_opendata_to_nfs4_state(opendata); |
| status = PTR_ERR(state); |
| if (IS_ERR(state)) |
| goto err_opendata_put; |
| if (server->caps & NFS_CAP_POSIX_LOCK) |
| set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
| |
| if (opendata->o_arg.open_flags & O_EXCL) { |
| nfs4_exclusive_attrset(opendata, sattr); |
| |
| nfs_fattr_init(opendata->o_res.f_attr); |
| status = nfs4_do_setattr(state->inode, cred, |
| opendata->o_res.f_attr, sattr, |
| state); |
| if (status == 0) |
| nfs_setattr_update_inode(state->inode, sattr); |
| nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); |
| } |
| |
| if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) |
| *ctx_th = opendata->f_attr.mdsthreshold; |
| else |
| kfree(opendata->f_attr.mdsthreshold); |
| opendata->f_attr.mdsthreshold = NULL; |
| |
| nfs4_opendata_put(opendata); |
| nfs4_put_state_owner(sp); |
| *res = state; |
| return 0; |
| err_opendata_put: |
| kfree(opendata->f_attr.mdsthreshold); |
| nfs4_opendata_put(opendata); |
| err_put_state_owner: |
| nfs4_put_state_owner(sp); |
| out_err: |
| *res = NULL; |
| return status; |
| } |
| |
| |
| static struct nfs4_state *nfs4_do_open(struct inode *dir, |
| struct dentry *dentry, |
| fmode_t fmode, |
| int flags, |
| struct iattr *sattr, |
| struct rpc_cred *cred, |
| struct nfs4_threshold **ctx_th) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs4_state *res; |
| int status; |
| |
| fmode &= FMODE_READ|FMODE_WRITE; |
| do { |
| status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, |
| &res, ctx_th); |
| if (status == 0) |
| break; |
| /* NOTE: BAD_SEQID means the server and client disagree about the |
| * book-keeping w.r.t. state-changing operations |
| * (OPEN/CLOSE/LOCK/LOCKU...) |
| * It is actually a sign of a bug on the client or on the server. |
| * |
| * If we receive a BAD_SEQID error in the particular case of |
| * doing an OPEN, we assume that nfs_increment_open_seqid() will |
| * have unhashed the old state_owner for us, and that we can |
| * therefore safely retry using a new one. We should still warn |
| * the user though... |
| */ |
| if (status == -NFS4ERR_BAD_SEQID) { |
| pr_warn_ratelimited("NFS: v4 server %s " |
| " returned a bad sequence-id error!\n", |
| NFS_SERVER(dir)->nfs_client->cl_hostname); |
| exception.retry = 1; |
| continue; |
| } |
| /* |
| * BAD_STATEID on OPEN means that the server cancelled our |
| * state before it received the OPEN_CONFIRM. |
| * Recover by retrying the request as per the discussion |
| * on Page 181 of RFC3530. |
| */ |
| if (status == -NFS4ERR_BAD_STATEID) { |
| exception.retry = 1; |
| continue; |
| } |
| if (status == -EAGAIN) { |
| /* We must have found a delegation */ |
| exception.retry = 1; |
| continue; |
| } |
| res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
| status, &exception)); |
| } while (exception.retry); |
| return res; |
| } |
| |
| static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, struct iattr *sattr, |
| struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_setattrargs arg = { |
| .fh = NFS_FH(inode), |
| .iap = sattr, |
| .server = server, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs_setattrres res = { |
| .fattr = fattr, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| unsigned long timestamp = jiffies; |
| int status; |
| |
| nfs_fattr_init(fattr); |
| |
| if (state != NULL) { |
| struct nfs_lockowner lockowner = { |
| .l_owner = current->files, |
| .l_pid = current->tgid, |
| }; |
| nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, |
| &lockowner); |
| } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode, |
| FMODE_WRITE)) { |
| /* Use that stateid */ |
| } else |
| nfs4_stateid_copy(&arg.stateid, &zero_stateid); |
| |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| if (status == 0 && state != NULL) |
| renew_lease(server, timestamp); |
| return status; |
| } |
| |
| static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, struct iattr *sattr, |
| struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_exception exception = { |
| .state = state, |
| .inode = inode, |
| }; |
| int err; |
| do { |
| err = _nfs4_do_setattr(inode, cred, fattr, sattr, state); |
| switch (err) { |
| case -NFS4ERR_OPENMODE: |
| if (state && !(state->state & FMODE_WRITE)) { |
| err = -EBADF; |
| if (sattr->ia_valid & ATTR_OPEN) |
| err = -EACCES; |
| goto out; |
| } |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| struct nfs4_closedata { |
| struct inode *inode; |
| struct nfs4_state *state; |
| struct nfs_closeargs arg; |
| struct nfs_closeres res; |
| struct nfs_fattr fattr; |
| unsigned long timestamp; |
| bool roc; |
| u32 roc_barrier; |
| }; |
| |
| static void nfs4_free_closedata(void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state_owner *sp = calldata->state->owner; |
| struct super_block *sb = calldata->state->inode->i_sb; |
| |
| if (calldata->roc) |
| pnfs_roc_release(calldata->state->inode); |
| nfs4_put_open_state(calldata->state); |
| nfs_free_seqid(calldata->arg.seqid); |
| nfs4_put_state_owner(sp); |
| nfs_sb_deactive(sb); |
| kfree(calldata); |
| } |
| |
| static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
| fmode_t fmode) |
| { |
| spin_lock(&state->owner->so_lock); |
| if (!(fmode & FMODE_READ)) |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| if (!(fmode & FMODE_WRITE)) |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| spin_unlock(&state->owner->so_lock); |
| } |
| |
| static void nfs4_close_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state *state = calldata->state; |
| struct nfs_server *server = NFS_SERVER(calldata->inode); |
| |
| dprintk("%s: begin!\n", __func__); |
| if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| return; |
| /* hmm. we are done with the inode, and in the process of freeing |
| * the state_owner. we keep this around to process errors |
| */ |
| switch (task->tk_status) { |
| case 0: |
| if (calldata->roc) |
| pnfs_roc_set_barrier(state->inode, |
| calldata->roc_barrier); |
| nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
| renew_lease(server, calldata->timestamp); |
| nfs4_close_clear_stateid_flags(state, |
| calldata->arg.fmode); |
| break; |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_EXPIRED: |
| if (calldata->arg.fmode == 0) |
| break; |
| default: |
| if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
| rpc_restart_call_prepare(task); |
| } |
| nfs_release_seqid(calldata->arg.seqid); |
| nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
| dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); |
| } |
| |
| static void nfs4_close_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state *state = calldata->state; |
| int call_close = 0; |
| |
| dprintk("%s: begin!\n", __func__); |
| if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| return; |
| |
| task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
| calldata->arg.fmode = FMODE_READ|FMODE_WRITE; |
| spin_lock(&state->owner->so_lock); |
| /* Calculate the change in open mode */ |
| if (state->n_rdwr == 0) { |
| if (state->n_rdonly == 0) { |
| call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| calldata->arg.fmode &= ~FMODE_READ; |
| } |
| if (state->n_wronly == 0) { |
| call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| calldata->arg.fmode &= ~FMODE_WRITE; |
| } |
| } |
| spin_unlock(&state->owner->so_lock); |
| |
| if (!call_close) { |
| /* Note: exit _without_ calling nfs4_close_done */ |
| task->tk_action = NULL; |
| goto out; |
| } |
| |
| if (calldata->arg.fmode == 0) { |
| task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; |
| if (calldata->roc && |
| pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) { |
| rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq, |
| task, NULL); |
| goto out; |
| } |
| } |
| |
| nfs_fattr_init(calldata->res.fattr); |
| calldata->timestamp = jiffies; |
| if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), |
| &calldata->arg.seq_args, |
| &calldata->res.seq_res, |
| task)) |
| goto out; |
| rpc_call_start(task); |
| out: |
| dprintk("%s: done!\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_close_ops = { |
| .rpc_call_prepare = nfs4_close_prepare, |
| .rpc_call_done = nfs4_close_done, |
| .rpc_release = nfs4_free_closedata, |
| }; |
| |
| /* |
| * It is possible for data to be read/written from a mem-mapped file |
| * after the sys_close call (which hits the vfs layer as a flush). |
| * This means that we can't safely call nfsv4 close on a file until |
| * the inode is cleared. This in turn means that we are not good |
| * NFSv4 citizens - we do not indicate to the server to update the file's |
| * share state even when we are done with one of the three share |
| * stateid's in the inode. |
| * |
| * NOTE: Caller must be holding the sp->so_owner semaphore! |
| */ |
| int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_closedata *calldata; |
| struct nfs4_state_owner *sp = state->owner; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_close_ops, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status = -ENOMEM; |
| |
| calldata = kzalloc(sizeof(*calldata), gfp_mask); |
| if (calldata == NULL) |
| goto out; |
| nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); |
| calldata->inode = state->inode; |
| calldata->state = state; |
| calldata->arg.fh = NFS_FH(state->inode); |
| calldata->arg.stateid = &state->open_stateid; |
| /* Serialization for the sequence id */ |
| calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); |
| if (calldata->arg.seqid == NULL) |
| goto out_free_calldata; |
| calldata->arg.fmode = 0; |
| calldata->arg.bitmask = server->cache_consistency_bitmask; |
| calldata->res.fattr = &calldata->fattr; |
| calldata->res.seqid = calldata->arg.seqid; |
| calldata->res.server = server; |
| calldata->roc = roc; |
| nfs_sb_active(calldata->inode->i_sb); |
| |
| msg.rpc_argp = &calldata->arg; |
| msg.rpc_resp = &calldata->res; |
| task_setup_data.callback_data = calldata; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = 0; |
| if (wait) |
| status = rpc_wait_for_completion_task(task); |
| rpc_put_task(task); |
| return status; |
| out_free_calldata: |
| kfree(calldata); |
| out: |
| if (roc) |
| pnfs_roc_release(state->inode); |
| nfs4_put_open_state(state); |
| nfs4_put_state_owner(sp); |
| return status; |
| } |
| |
| static struct inode * |
| nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) |
| { |
| struct nfs4_state *state; |
| |
| /* Protect against concurrent sillydeletes */ |
| state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, |
| ctx->cred, &ctx->mdsthreshold); |
| if (IS_ERR(state)) |
| return ERR_CAST(state); |
| ctx->state = state; |
| return igrab(state->inode); |
| } |
| |
| static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
| { |
| if (ctx->state == NULL) |
| return; |
| if (is_sync) |
| nfs4_close_sync(ctx->state, ctx->mode); |
| else |
| nfs4_close_state(ctx->state, ctx->mode); |
| } |
| |
| static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| { |
| struct nfs4_server_caps_arg args = { |
| .fhandle = fhandle, |
| }; |
| struct nfs4_server_caps_res res = {}; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| if (status == 0) { |
| memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
| NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| |
| NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| |
| NFS_CAP_CTIME|NFS_CAP_MTIME); |
| if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
| server->caps |= NFS_CAP_ACLS; |
| if (res.has_links != 0) |
| server->caps |= NFS_CAP_HARDLINKS; |
| if (res.has_symlinks != 0) |
| server->caps |= NFS_CAP_SYMLINKS; |
| if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
| server->caps |= NFS_CAP_FILEID; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) |
| server->caps |= NFS_CAP_MODE; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) |
| server->caps |= NFS_CAP_NLINK; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) |
| server->caps |= NFS_CAP_OWNER; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) |
| server->caps |= NFS_CAP_OWNER_GROUP; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) |
| server->caps |= NFS_CAP_ATIME; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) |
| server->caps |= NFS_CAP_CTIME; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) |
| server->caps |= NFS_CAP_MTIME; |
| |
| memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
| server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; |
| server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; |
| server->acl_bitmask = res.acl_bitmask; |
| server->fh_expire_type = res.fh_expire_type; |
| } |
| |
| return status; |
| } |
| |
| int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_server_capabilities(server, fhandle), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct nfs4_lookup_root_arg args = { |
| .bitmask = nfs4_fattr_bitmap, |
| }; |
| struct nfs4_lookup_res res = { |
| .server = server, |
| .fattr = info->fattr, |
| .fh = fhandle, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(info->fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_lookup_root(server, fhandle, info); |
| switch (err) { |
| case 0: |
| case -NFS4ERR_WRONGSEC: |
| goto out; |
| default: |
| err = nfs4_handle_exception(server, err, &exception); |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, rpc_authflavor_t flavor) |
| { |
| struct rpc_auth *auth; |
| int ret; |
| |
| auth = rpcauth_create(flavor, server->client); |
| if (IS_ERR(auth)) { |
| ret = -EIO; |
| goto out; |
| } |
| ret = nfs4_lookup_root(server, fhandle, info); |
| out: |
| return ret; |
| } |
| |
| static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int i, len, status = 0; |
| rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS]; |
| |
| len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array)); |
| BUG_ON(len < 0); |
| |
| for (i = 0; i < len; i++) { |
| /* AUTH_UNIX is the default flavor if none was specified, |
| * thus has already been tried. */ |
| if (flav_array[i] == RPC_AUTH_UNIX) |
| continue; |
| |
| status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]); |
| if (status == -NFS4ERR_WRONGSEC || status == -EACCES) |
| continue; |
| break; |
| } |
| /* |
| * -EACCESS could mean that the user doesn't have correct permissions |
| * to access the mount. It could also mean that we tried to mount |
| * with a gss auth flavor, but rpc.gssd isn't running. Either way, |
| * existing mount programs don't handle -EACCES very well so it should |
| * be mapped to -EPERM instead. |
| */ |
| if (status == -EACCES) |
| status = -EPERM; |
| return status; |
| } |
| |
| /* |
| * get the file handle for the "/" directory on the server |
| */ |
| int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int minor_version = server->nfs_client->cl_minorversion; |
| int status = nfs4_lookup_root(server, fhandle, info); |
| if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR)) |
| /* |
| * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM |
| * by nfs4_map_errors() as this function exits. |
| */ |
| status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info); |
| if (status == 0) |
| status = nfs4_server_capabilities(server, fhandle); |
| if (status == 0) |
| status = nfs4_do_fsinfo(server, fhandle, info); |
| return nfs4_map_errors(status); |
| } |
| |
| static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, |
| struct nfs_fsinfo *info) |
| { |
| int error; |
| struct nfs_fattr *fattr = info->fattr; |
| |
| error = nfs4_server_capabilities(server, mntfh); |
| if (error < 0) { |
| dprintk("nfs4_get_root: getcaps error = %d\n", -error); |
| return error; |
| } |
| |
| error = nfs4_proc_getattr(server, mntfh, fattr); |
| if (error < 0) { |
| dprintk("nfs4_get_root: getattr error = %d\n", -error); |
| return error; |
| } |
| |
| if (fattr->valid & NFS_ATTR_FATTR_FSID && |
| !nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
| memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
| |
| return error; |
| } |
| |
| /* |
| * Get locations and (maybe) other attributes of a referral. |
| * Note that we'll actually follow the referral later when |
| * we detect fsid mismatch in inode revalidation |
| */ |
| static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, |
| const struct qstr *name, struct nfs_fattr *fattr, |
| struct nfs_fh *fhandle) |
| { |
| int status = -ENOMEM; |
| struct page *page = NULL; |
| struct nfs4_fs_locations *locations = NULL; |
| |
| page = alloc_page(GFP_KERNEL); |
| if (page == NULL) |
| goto out; |
| locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| if (locations == NULL) |
| goto out; |
| |
| status = nfs4_proc_fs_locations(client, dir, name, locations, page); |
| if (status != 0) |
| goto out; |
| /* Make sure server returned a different fsid for the referral */ |
| if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { |
| dprintk("%s: server did not return a different fsid for" |
| " a referral at %s\n", __func__, name->name); |
| status = -EIO; |
| goto out; |
| } |
| /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ |
| nfs_fixup_referral_attributes(&locations->fattr); |
| |
| /* replace the lookup nfs_fattr with the locations nfs_fattr */ |
| memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); |
| memset(fhandle, 0, sizeof(struct nfs_fh)); |
| out: |
| if (page) |
| __free_page(page); |
| kfree(locations); |
| return status; |
| } |
| |
| static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct nfs4_getattr_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_getattr_res res = { |
| .fattr = fattr, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_getattr(server, fhandle, fattr), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * The file is not closed if it is opened due to the a request to change |
| * the size of the file. The open call will not be needed once the |
| * VFS layer lookup-intents are implemented. |
| * |
| * Close is called when the inode is destroyed. |
| * If we haven't opened the file for O_WRONLY, we |
| * need to in the size_change case to obtain a stateid. |
| * |
| * Got race? |
| * Because OPEN is always done by name in nfsv4, it is |
| * possible that we opened a different file by the same |
| * name. We can recognize this race condition, but we |
| * can't do anything about it besides returning an error. |
| * |
| * This will be fixed with VFS changes (lookup-intent). |
| */ |
| static int |
| nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| struct iattr *sattr) |
| { |
| struct inode *inode = dentry->d_inode; |
| struct rpc_cred *cred = NULL; |
| struct nfs4_state *state = NULL; |
| int status; |
| |
| if (pnfs_ld_layoutret_on_setattr(inode)) |
| pnfs_return_layout(inode); |
| |
| nfs_fattr_init(fattr); |
| |
| /* Deal with open(O_TRUNC) */ |
| if (sattr->ia_valid & ATTR_OPEN) |
| sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN); |
| |
| /* Optimization: if the end result is no change, don't RPC */ |
| if ((sattr->ia_valid & ~(ATTR_FILE)) == 0) |
| return 0; |
| |
| /* Search for an existing open(O_WRITE) file */ |
| if (sattr->ia_valid & ATTR_FILE) { |
| struct nfs_open_context *ctx; |
| |
| ctx = nfs_file_open_context(sattr->ia_file); |
| if (ctx) { |
| cred = ctx->cred; |
| state = ctx->state; |
| } |
| } |
| |
| status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
| if (status == 0) |
| nfs_setattr_update_inode(inode, sattr); |
| return status; |
| } |
| |
| static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, |
| const struct qstr *name, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| int status; |
| struct nfs4_lookup_arg args = { |
| .bitmask = server->attr_bitmask, |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| }; |
| struct nfs4_lookup_res res = { |
| .server = server, |
| .fattr = fattr, |
| .fh = fhandle, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(fattr); |
| |
| dprintk("NFS call lookup %s\n", name->name); |
| status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); |
| dprintk("NFS reply lookup: %d\n", status); |
| return status; |
| } |
| |
| static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) |
| { |
| fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; |
| fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| fattr->nlink = 2; |
| } |
| |
| static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, |
| struct qstr *name, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr) |
| { |
| struct nfs4_exception exception = { }; |
| struct rpc_clnt *client = *clnt; |
| int err; |
| do { |
| err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr); |
| switch (err) { |
| case -NFS4ERR_BADNAME: |
| err = -ENOENT; |
| goto out; |
| case -NFS4ERR_MOVED: |
| err = nfs4_get_referral(client, dir, name, fattr, fhandle); |
| goto out; |
| case -NFS4ERR_WRONGSEC: |
| err = -EPERM; |
| if (client != *clnt) |
| goto out; |
| |
| client = nfs4_create_sec_client(client, dir, name); |
| if (IS_ERR(client)) |
| return PTR_ERR(client); |
| |
| exception.retry = 1; |
| break; |
| default: |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); |
| } |
| } while (exception.retry); |
| |
| out: |
| if (err == 0) |
| *clnt = client; |
| else if (client != *clnt) |
| rpc_shutdown_client(client); |
| |
| return err; |
| } |
| |
| static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| int status; |
| struct rpc_clnt *client = NFS_CLIENT(dir); |
| |
| status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); |
| if (client != NFS_CLIENT(dir)) { |
| rpc_shutdown_client(client); |
| nfs_fixup_secinfo_attributes(fattr); |
| } |
| return status; |
| } |
| |
| struct rpc_clnt * |
| nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| int status; |
| struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir)); |
| |
| status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); |
| if (status < 0) { |
| rpc_shutdown_client(client); |
| return ERR_PTR(status); |
| } |
| return client; |
| } |
| |
| static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_accessargs args = { |
| .fh = NFS_FH(inode), |
| .bitmask = server->cache_consistency_bitmask, |
| }; |
| struct nfs4_accessres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = entry->cred, |
| }; |
| int mode = entry->mask; |
| int status; |
| |
| /* |
| * Determine which access bits we want to ask for... |
| */ |
| if (mode & MAY_READ) |
| args.access |= NFS4_ACCESS_READ; |
| if (S_ISDIR(inode->i_mode)) { |
| if (mode & MAY_WRITE) |
| args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; |
| if (mode & MAY_EXEC) |
| args.access |= NFS4_ACCESS_LOOKUP; |
| } else { |
| if (mode & MAY_WRITE) |
| args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; |
| if (mode & MAY_EXEC) |
| args.access |= NFS4_ACCESS_EXECUTE; |
| } |
| |
| res.fattr = nfs_alloc_fattr(); |
| if (res.fattr == NULL) |
| return -ENOMEM; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| if (!status) { |
| entry->mask = 0; |
| if (res.access & NFS4_ACCESS_READ) |
| entry->mask |= MAY_READ; |
| if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) |
| entry->mask |= MAY_WRITE; |
| if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) |
| entry->mask |= MAY_EXEC; |
| nfs_refresh_inode(inode, res.fattr); |
| } |
| nfs_free_fattr(res.fattr); |
| return status; |
| } |
| |
| static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(inode), |
| _nfs4_proc_access(inode, entry), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * TODO: For the time being, we don't try to get any attributes |
| * along with any of the zero-copy operations READ, READDIR, |
| * READLINK, WRITE. |
| * |
| * In the case of the first three, we want to put the GETATTR |
| * after the read-type operation -- this is because it is hard |
| * to predict the length of a GETATTR response in v4, and thus |
| * align the READ data correctly. This means that the GETATTR |
| * may end up partially falling into the page cache, and we should |
| * shift it into the 'tail' of the xdr_buf before processing. |
| * To do this efficiently, we need to know the total length |
| * of data received, which doesn't seem to be available outside |
| * of the RPC layer. |
| * |
| * In the case of WRITE, we also want to put the GETATTR after |
| * the operation -- in this case because we want to make sure |
| * we get the post-operation mtime and size. |
| * |
| * Both of these changes to the XDR layer would in fact be quite |
| * minor, but I decided to leave them for a subsequent patch. |
| */ |
| static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
| unsigned int pgbase, unsigned int pglen) |
| { |
| struct nfs4_readlink args = { |
| .fh = NFS_FH(inode), |
| .pgbase = pgbase, |
| .pglen = pglen, |
| .pages = &page, |
| }; |
| struct nfs4_readlink_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
| unsigned int pgbase, unsigned int pglen) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(inode), |
| _nfs4_proc_readlink(inode, page, pgbase, pglen), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * This is just for mknod. open(O_CREAT) will always do ->open_context(). |
| */ |
| static int |
| nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| int flags) |
| { |
| struct nfs_open_context *ctx; |
| struct nfs4_state *state; |
| int status = 0; |
| |
| ctx = alloc_nfs_open_context(dentry, FMODE_READ); |
| if (IS_ERR(ctx)) |
| return PTR_ERR(ctx); |
| |
| sattr->ia_mode &= ~current_umask(); |
| state = nfs4_do_open(dir, dentry, ctx->mode, |
| flags, sattr, ctx->cred, |
| &ctx->mdsthreshold); |
| d_drop(dentry); |
| if (IS_ERR(state)) { |
| status = PTR_ERR(state); |
| goto out; |
| } |
| d_add(dentry, igrab(state->inode)); |
| nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
| ctx->state = state; |
| out: |
| put_nfs_open_context(ctx); |
| return status; |
| } |
| |
| static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_removeargs args = { |
| .fh = NFS_FH(dir), |
| .name = *name, |
| }; |
| struct nfs_removeres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); |
| if (status == 0) |
| update_changeattr(dir, &res.cinfo); |
| return status; |
| } |
| |
| static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_remove(dir, name), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_removeargs *args = msg->rpc_argp; |
| struct nfs_removeres *res = msg->rpc_resp; |
| |
| res->server = server; |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| nfs41_init_sequence(&args->seq_args, &res->seq_res, 1); |
| } |
| |
| static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) |
| { |
| if (nfs4_setup_sequence(NFS_SERVER(data->dir), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| { |
| struct nfs_removeres *res = task->tk_msg.rpc_resp; |
| |
| if (!nfs4_sequence_done(task, &res->seq_res)) |
| return 0; |
| if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
| return 0; |
| update_changeattr(dir, &res->cinfo); |
| return 1; |
| } |
| |
| static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_renameargs *arg = msg->rpc_argp; |
| struct nfs_renameres *res = msg->rpc_resp; |
| |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; |
| res->server = server; |
| nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1); |
| } |
| |
| static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) |
| { |
| if (nfs4_setup_sequence(NFS_SERVER(data->old_dir), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| struct inode *new_dir) |
| { |
| struct nfs_renameres *res = task->tk_msg.rpc_resp; |
| |
| if (!nfs4_sequence_done(task, &res->seq_res)) |
| return 0; |
| if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
| return 0; |
| |
| update_changeattr(old_dir, &res->old_cinfo); |
| update_changeattr(new_dir, &res->new_cinfo); |
| return 1; |
| } |
| |
| static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| struct inode *new_dir, struct qstr *new_name) |
| { |
| struct nfs_server *server = NFS_SERVER(old_dir); |
| struct nfs_renameargs arg = { |
| .old_dir = NFS_FH(old_dir), |
| .new_dir = NFS_FH(new_dir), |
| .old_name = old_name, |
| .new_name = new_name, |
| }; |
| struct nfs_renameres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status = -ENOMEM; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| if (!status) { |
| update_changeattr(old_dir, &res.old_cinfo); |
| update_changeattr(new_dir, &res.new_cinfo); |
| } |
| return status; |
| } |
| |
| static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| struct inode *new_dir, struct qstr *new_name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(old_dir), |
| _nfs4_proc_rename(old_dir, old_name, |
| new_dir, new_name), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_link_arg arg = { |
| .fh = NFS_FH(inode), |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_link_res res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status = -ENOMEM; |
| |
| res.fattr = nfs_alloc_fattr(); |
| if (res.fattr == NULL) |
| goto out; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| if (!status) { |
| update_changeattr(dir, &res.cinfo); |
| nfs_post_op_update_inode(inode, res.fattr); |
| } |
| out: |
| nfs_free_fattr(res.fattr); |
| return status; |
| } |
| |
| static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(inode), |
| _nfs4_proc_link(inode, dir, name), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| struct nfs4_createdata { |
| struct rpc_message msg; |
| struct nfs4_create_arg arg; |
| struct nfs4_create_res res; |
| struct nfs_fh fh; |
| struct nfs_fattr fattr; |
| }; |
| |
| static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, |
| struct qstr *name, struct iattr *sattr, u32 ftype) |
| { |
| struct nfs4_createdata *data; |
| |
| data = kzalloc(sizeof(*data), GFP_KERNEL); |
| if (data != NULL) { |
| struct nfs_server *server = NFS_SERVER(dir); |
| |
| data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; |
| data->msg.rpc_argp = &data->arg; |
| data->msg.rpc_resp = &data->res; |
| data->arg.dir_fh = NFS_FH(dir); |
| data->arg.server = server; |
| data->arg.name = name; |
| data->arg.attrs = sattr; |
| data->arg.ftype = ftype; |
| data->arg.bitmask = server->attr_bitmask; |
| data->res.server = server; |
| data->res.fh = &data->fh; |
| data->res.fattr = &data->fattr; |
| nfs_fattr_init(data->res.fattr); |
| } |
| return data; |
| } |
| |
| static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) |
| { |
| int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, |
| &data->arg.seq_args, &data->res.seq_res, 1); |
| if (status == 0) { |
| update_changeattr(dir, &data->res.dir_cinfo); |
| status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); |
| } |
| return status; |
| } |
| |
| static void nfs4_free_createdata(struct nfs4_createdata *data) |
| { |
| kfree(data); |
| } |
| |
| static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| struct page *page, unsigned int len, struct iattr *sattr) |
| { |
| struct nfs4_createdata *data; |
| int status = -ENAMETOOLONG; |
| |
| if (len > NFS4_MAXPATHLEN) |
| goto out; |
| |
| status = -ENOMEM; |
| data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); |
| if (data == NULL) |
| goto out; |
| |
| data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; |
| data->arg.u.symlink.pages = &page; |
| data->arg.u.symlink.len = len; |
| |
| status = nfs4_do_create(dir, dentry, data); |
| |
| nfs4_free_createdata(data); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| struct page *page, unsigned int len, struct iattr *sattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_symlink(dir, dentry, page, |
| len, sattr), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr) |
| { |
| struct nfs4_createdata *data; |
| int status = -ENOMEM; |
| |
| data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
| if (data == NULL) |
| goto out; |
| |
| status = nfs4_do_create(dir, dentry, data); |
| |
| nfs4_free_createdata(data); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| sattr->ia_mode &= ~current_umask(); |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_mkdir(dir, dentry, sattr), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page **pages, unsigned int count, int plus) |
| { |
| struct inode *dir = dentry->d_inode; |
| struct nfs4_readdir_arg args = { |
| .fh = NFS_FH(dir), |
| .pages = pages, |
| .pgbase = 0, |
| .count = count, |
| .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
| .plus = plus, |
| }; |
| struct nfs4_readdir_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
| dentry->d_parent->d_name.name, |
| dentry->d_name.name, |
| (unsigned long long)cookie); |
| nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); |
| res.pgbase = args.pgbase; |
| status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); |
| if (status >= 0) { |
| memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); |
| status += args.pgbase; |
| } |
| |
| nfs_invalidate_atime(dir); |
| |
| dprintk("%s: returns %d\n", __func__, status); |
| return status; |
| } |
| |
| static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page **pages, unsigned int count, int plus) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), |
| _nfs4_proc_readdir(dentry, cred, cookie, |
| pages, count, plus), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, dev_t rdev) |
| { |
| struct nfs4_createdata *data; |
| int mode = sattr->ia_mode; |
| int status = -ENOMEM; |
| |
| BUG_ON(!(sattr->ia_valid & ATTR_MODE)); |
| BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); |
| |
| data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); |
| if (data == NULL) |
| goto out; |
| |
| if (S_ISFIFO(mode)) |
| data->arg.ftype = NF4FIFO; |
| else if (S_ISBLK(mode)) { |
| data->arg.ftype = NF4BLK; |
| data->arg.u.device.specdata1 = MAJOR(rdev); |
| data->arg.u.device.specdata2 = MINOR(rdev); |
| } |
| else if (S_ISCHR(mode)) { |
| data->arg.ftype = NF4CHR; |
| data->arg.u.device.specdata1 = MAJOR(rdev); |
| data->arg.u.device.specdata2 = MINOR(rdev); |
| } |
| |
| status = nfs4_do_create(dir, dentry, data); |
| |
| nfs4_free_createdata(data); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, dev_t rdev) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| sattr->ia_mode &= ~current_umask(); |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_mknod(dir, dentry, sattr, rdev), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsstat *fsstat) |
| { |
| struct nfs4_statfs_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_statfs_res res = { |
| .fsstat = fsstat, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(fsstat->fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_statfs(server, fhandle, fsstat), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *fsinfo) |
| { |
| struct nfs4_fsinfo_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_fsinfo_res res = { |
| .fsinfo = fsinfo, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_do_fsinfo(server, fhandle, fsinfo), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| { |
| int error; |
| |
| nfs_fattr_init(fsinfo->fattr); |
| error = nfs4_do_fsinfo(server, fhandle, fsinfo); |
| if (error == 0) |
| set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); |
| |
| return error; |
| } |
| |
| static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_pathconf *pathconf) |
| { |
| struct nfs4_pathconf_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_pathconf_res res = { |
| .pathconf = pathconf, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| /* None of the pathconf attributes are mandatory to implement */ |
| if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
| memset(pathconf, 0, sizeof(*pathconf)); |
| return 0; |
| } |
| |
| nfs_fattr_init(pathconf->fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_pathconf *pathconf) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_pathconf(server, fhandle, pathconf), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| void __nfs4_read_done_cb(struct nfs_read_data *data) |
| { |
| nfs_invalidate_atime(data->header->inode); |
| } |
| |
| static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data) |
| { |
| struct nfs_server *server = NFS_SERVER(data->header->inode); |
| |
| if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return -EAGAIN; |
| } |
| |
| __nfs4_read_done_cb(data); |
| if (task->tk_status > 0) |
| renew_lease(server, data->timestamp); |
| return 0; |
| } |
| |
| static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
| { |
| |
| dprintk("--> %s\n", __func__); |
| |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return -EAGAIN; |
| |
| return data->read_done_cb ? data->read_done_cb(task, data) : |
| nfs4_read_done_cb(task, data); |
| } |
| |
| static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
| { |
| data->timestamp = jiffies; |
| data->read_done_cb = nfs4_read_done_cb; |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
| nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); |
| } |
| |
| static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) |
| { |
| if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data) |
| { |
| struct inode *inode = data->header->inode; |
| |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return -EAGAIN; |
| } |
| if (task->tk_status >= 0) { |
| renew_lease(NFS_SERVER(inode), data->timestamp); |
| nfs_post_op_update_inode_force_wcc(inode, &data->fattr); |
| } |
| return 0; |
| } |
| |
| static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
| { |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return -EAGAIN; |
| return data->write_done_cb ? data->write_done_cb(task, data) : |
| nfs4_write_done_cb(task, data); |
| } |
| |
| static |
| bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data) |
| { |
| const struct nfs_pgio_header *hdr = data->header; |
| |
| /* Don't request attributes for pNFS or O_DIRECT writes */ |
| if (data->ds_clp != NULL || hdr->dreq != NULL) |
| return false; |
| /* Otherwise, request attributes if and only if we don't hold |
| * a delegation |
| */ |
| return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; |
| } |
| |
| static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| { |
| struct nfs_server *server = NFS_SERVER(data->header->inode); |
| |
| if (!nfs4_write_need_cache_consistency_data(data)) { |
| data->args.bitmask = NULL; |
| data->res.fattr = NULL; |
| } else |
| data->args.bitmask = server->cache_consistency_bitmask; |
| |
| if (!data->write_done_cb) |
| data->write_done_cb = nfs4_write_done_cb; |
| data->res.server = server; |
| data->timestamp = jiffies; |
| |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
| nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| } |
| |
| static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) |
| { |
| if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| if (nfs4_setup_sequence(NFS_SERVER(data->inode), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| struct inode *inode = data->inode; |
| |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return -EAGAIN; |
| } |
| return 0; |
| } |
| |
| static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return -EAGAIN; |
| return data->commit_done_cb(task, data); |
| } |
| |
| static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) |
| { |
| struct nfs_server *server = NFS_SERVER(data->inode); |
| |
| if (data->commit_done_cb == NULL) |
| data->commit_done_cb = nfs4_commit_done_cb; |
| data->res.server = server; |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
| nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| } |
| |
| struct nfs4_renewdata { |
| struct nfs_client *client; |
| unsigned long timestamp; |
| }; |
| |
| /* |
| * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
| * standalone procedure for queueing an asynchronous RENEW. |
| */ |
| static void nfs4_renew_release(void *calldata) |
| { |
| struct nfs4_renewdata *data = calldata; |
| struct nfs_client *clp = data->client; |
| |
| if (atomic_read(&clp->cl_count) > 1) |
| nfs4_schedule_state_renewal(clp); |
| nfs_put_client(clp); |
| kfree(data); |
| } |
| |
| static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_renewdata *data = calldata; |
| struct nfs_client *clp = data->client; |
| unsigned long timestamp = data->timestamp; |
| |
| if (task->tk_status < 0) { |
| /* Unless we're shutting down, schedule state recovery! */ |
| if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) |
| return; |
| if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { |
| nfs4_schedule_lease_recovery(clp); |
| return; |
| } |
| nfs4_schedule_path_down_recovery(clp); |
| } |
| do_renew_lease(clp, timestamp); |
| } |
| |
| static const struct rpc_call_ops nfs4_renew_ops = { |
| .rpc_call_done = nfs4_renew_done, |
| .rpc_release = nfs4_renew_release, |
| }; |
| |
| static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| .rpc_argp = clp, |
| .rpc_cred = cred, |
| }; |
| struct nfs4_renewdata *data; |
| |
| if (renew_flags == 0) |
| return 0; |
| if (!atomic_inc_not_zero(&clp->cl_count)) |
| return -EIO; |
| data = kmalloc(sizeof(*data), GFP_NOFS); |
| if (data == NULL) |
| return -ENOMEM; |
| data->client = clp; |
| data->timestamp = jiffies; |
| return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
| &nfs4_renew_ops, data); |
| } |
| |
| static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| .rpc_argp = clp, |
| .rpc_cred = cred, |
| }; |
| unsigned long now = jiffies; |
| int status; |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| if (status < 0) |
| return status; |
| do_renew_lease(clp, now); |
| return 0; |
| } |
| |
| static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| { |
| return (server->caps & NFS_CAP_ACLS) |
| && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); |
| } |
| |
| /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that |
| * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on |
| * the stack. |
| */ |
| #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) |
| |
| static int buf_to_pages_noslab(const void *buf, size_t buflen, |
| struct page **pages, unsigned int *pgbase) |
| { |
| struct page *newpage, **spages; |
| int rc = 0; |
| size_t len; |
| spages = pages; |
| |
| do { |
| len = min_t(size_t, PAGE_SIZE, buflen); |
| newpage = alloc_page(GFP_KERNEL); |
| |
| if (newpage == NULL) |
| goto unwind; |
| memcpy(page_address(newpage), buf, len); |
| buf += len; |
| buflen -= len; |
| *pages++ = newpage; |
| rc++; |
| } while (buflen != 0); |
| |
| return rc; |
| |
| unwind: |
| for(; rc > 0; rc--) |
| __free_page(spages[rc-1]); |
| return -ENOMEM; |
| } |
| |
| struct nfs4_cached_acl { |
| int cached; |
| size_t len; |
| char data[0]; |
| }; |
| |
| static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
| { |
| struct nfs_inode *nfsi = NFS_I(inode); |
| |
| spin_lock(&inode->i_lock); |
| kfree(nfsi->nfs4_acl); |
| nfsi->nfs4_acl = acl; |
| spin_unlock(&inode->i_lock); |
| } |
| |
| static void nfs4_zap_acl_attr(struct inode *inode) |
| { |
| nfs4_set_cached_acl(inode, NULL); |
| } |
| |
| static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
| { |
| struct nfs_inode *nfsi = NFS_I(inode); |
| struct nfs4_cached_acl *acl; |
| int ret = -ENOENT; |
| |
| spin_lock(&inode->i_lock); |
| acl = nfsi->nfs4_acl; |
| if (acl == NULL) |
| goto out; |
| if (buf == NULL) /* user is just asking for length */ |
| goto out_len; |
| if (acl->cached == 0) |
| goto out; |
| ret = -ERANGE; /* see getxattr(2) man page */ |
| if (acl->len > buflen) |
| goto out; |
| memcpy(buf, acl->data, acl->len); |
| out_len: |
| ret = acl->len; |
| out: |
| spin_unlock(&inode->i_lock); |
| return ret; |
| } |
| |
| static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) |
| { |
| struct nfs4_cached_acl *acl; |
| size_t buflen = sizeof(*acl) + acl_len; |
| |
| if (buflen <= PAGE_SIZE) { |
| acl = kmalloc(buflen, GFP_KERNEL); |
| if (acl == NULL) |
| goto out; |
| acl->cached = 1; |
| _copy_from_pages(acl->data, pages, pgbase, acl_len); |
| } else { |
| acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
| if (acl == NULL) |
| goto out; |
| acl->cached = 0; |
| } |
| acl->len = acl_len; |
| out: |
| nfs4_set_cached_acl(inode, acl); |
| } |
| |
| /* |
| * The getxattr API returns the required buffer length when called with a |
| * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating |
| * the required buf. On a NULL buf, we send a page of data to the server |
| * guessing that the ACL request can be serviced by a page. If so, we cache |
| * up to the page of ACL data, and the 2nd call to getxattr is serviced by |
| * the cache. If not so, we throw away the page, and cache the required |
| * length. The next getxattr call will then produce another round trip to |
| * the server, this time with the input buf of the required size. |
| */ |
| static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; |
| struct nfs_getaclargs args = { |
| .fh = NFS_FH(inode), |
| .acl_pages = pages, |
| .acl_len = buflen, |
| }; |
| struct nfs_getaclres res = { |
| .acl_len = buflen, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); |
| int ret = -ENOMEM, i; |
| |
| /* As long as we're doing a round trip to the server anyway, |
| * let's be prepared for a page of acl data. */ |
| if (npages == 0) |
| npages = 1; |
| if (npages > ARRAY_SIZE(pages)) |
| return -ERANGE; |
| |
| for (i = 0; i < npages; i++) { |
| pages[i] = alloc_page(GFP_KERNEL); |
| if (!pages[i]) |
| goto out_free; |
| } |
| |
| /* for decoding across pages */ |
| res.acl_scratch = alloc_page(GFP_KERNEL); |
| if (!res.acl_scratch) |
| goto out_free; |
| |
| args.acl_len = npages * PAGE_SIZE; |
| args.acl_pgbase = 0; |
| |
| dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", |
| __func__, buf, buflen, npages, args.acl_len); |
| ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), |
| &msg, &args.seq_args, &res.seq_res, 0); |
| if (ret) |
| goto out_free; |
| |
| /* Handle the case where the passed-in buffer is too short */ |
| if (res.acl_flags & NFS4_ACL_TRUNC) { |
| /* Did the user only issue a request for the acl length? */ |
| if (buf == NULL) |
| goto out_ok; |
| ret = -ERANGE; |
| goto out_free; |
| } |
| nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); |
| if (buf) |
| _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); |
| out_ok: |
| ret = res.acl_len; |
| out_free: |
| for (i = 0; i < npages; i++) |
| if (pages[i]) |
| __free_page(pages[i]); |
| if (res.acl_scratch) |
| __free_page(res.acl_scratch); |
| return ret; |
| } |
| |
| static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct nfs4_exception exception = { }; |
| ssize_t ret; |
| do { |
| ret = __nfs4_get_acl_uncached(inode, buf, buflen); |
| if (ret >= 0) |
| break; |
| ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); |
| } while (exception.retry); |
| return ret; |
| } |
| |
| static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| int ret; |
| |
| if (!nfs4_server_supports_acls(server)) |
| return -EOPNOTSUPP; |
| ret = nfs_revalidate_inode(server, inode); |
| if (ret < 0) |
| return ret; |
| if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
| nfs_zap_acl_cache(inode); |
| ret = nfs4_read_cached_acl(inode, buf, buflen); |
| if (ret != -ENOENT) |
| /* -ENOENT is returned if there is no ACL or if there is an ACL |
| * but no cached acl data, just the acl length */ |
| return ret; |
| return nfs4_get_acl_uncached(inode, buf, buflen); |
| } |
| |
| static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct page *pages[NFS4ACL_MAXPAGES]; |
| struct nfs_setaclargs arg = { |
| .fh = NFS_FH(inode), |
| .acl_pages = pages, |
| .acl_len = buflen, |
| }; |
| struct nfs_setaclres res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); |
| int ret, i; |
| |
| if (!nfs4_server_supports_acls(server)) |
| return -EOPNOTSUPP; |
| if (npages > ARRAY_SIZE(pages)) |
| return -ERANGE; |
| i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
| if (i < 0) |
| return i; |
| nfs4_inode_return_delegation(inode); |
| ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| |
| /* |
| * Free each page after tx, so the only ref left is |
| * held by the network stack |
| */ |
| for (; i > 0; i--) |
| put_page(pages[i-1]); |
| |
| /* |
| * Acl update can result in inode attribute update. |
| * so mark the attribute cache invalid. |
| */ |
| spin_lock(&inode->i_lock); |
| NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; |
| spin_unlock(&inode->i_lock); |
| nfs_access_zap_cache(inode); |
| nfs_zap_acl_cache(inode); |
| return ret; |
| } |
| |
| static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(inode), |
| __nfs4_proc_set_acl(inode, buf, buflen), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int |
| nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
| { |
| struct nfs_client *clp = server->nfs_client; |
| |
| if (task->tk_status >= 0) |
| return 0; |
| switch(task->tk_status) { |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| if (state == NULL) |
| break; |
| nfs_remove_bad_delegation(state->inode); |
| case -NFS4ERR_OPENMODE: |
| if (state == NULL) |
| break; |
| nfs4_schedule_stateid_recovery(server, state); |
| goto wait_on_recovery; |
| case -NFS4ERR_EXPIRED: |
| if (state != NULL) |
| nfs4_schedule_stateid_recovery(server, state); |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_STALE_CLIENTID: |
| nfs4_schedule_lease_recovery(clp); |
| goto wait_on_recovery; |
| #if defined(CONFIG_NFS_V4_1) |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_DEADSESSION: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_SEQ_FALSE_RETRY: |
| case -NFS4ERR_SEQ_MISORDERED: |
| dprintk("%s ERROR %d, Reset session\n", __func__, |
| task->tk_status); |
| nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
| task->tk_status = 0; |
| return -EAGAIN; |
| #endif /* CONFIG_NFS_V4_1 */ |
| case -NFS4ERR_DELAY: |
| nfs_inc_server_stats(server, NFSIOS_DELAY); |
| case -NFS4ERR_GRACE: |
| case -EKEYEXPIRED: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| task->tk_status = 0; |
| return -EAGAIN; |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| case -NFS4ERR_OLD_STATEID: |
| task->tk_status = 0; |
| return -EAGAIN; |
| } |
| task->tk_status = nfs4_map_errors(task->tk_status); |
| return 0; |
| wait_on_recovery: |
| rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
| if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
| rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
| task->tk_status = 0; |
| return -EAGAIN; |
| } |
| |
| static void nfs4_init_boot_verifier(const struct nfs_client *clp, |
| nfs4_verifier *bootverf) |
| { |
| __be32 verf[2]; |
| |
| if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
| /* An impossible timestamp guarantees this value |
| * will never match a generated boot time. */ |
| verf[0] = 0; |
| verf[1] = (__be32)(NSEC_PER_SEC + 1); |
| } else { |
| struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
| verf[0] = (__be32)nn->boot_time.tv_sec; |
| verf[1] = (__be32)nn->boot_time.tv_nsec; |
| } |
| memcpy(bootverf->data, verf, sizeof(bootverf->data)); |
| } |
| |
| /** |
| * nfs4_proc_setclientid - Negotiate client ID |
| * @clp: state data structure |
| * @program: RPC program for NFSv4 callback service |
| * @port: IP port number for NFS4 callback service |
| * @cred: RPC credential to use for this call |
| * @res: where to place the result |
| * |
| * Returns zero, a negative errno, or a negative NFS4ERR status code. |
| */ |
| int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
| unsigned short port, struct rpc_cred *cred, |
| struct nfs4_setclientid_res *res) |
| { |
| nfs4_verifier sc_verifier; |
| struct nfs4_setclientid setclientid = { |
| .sc_verifier = &sc_verifier, |
| .sc_prog = program, |
| .sc_cb_ident = clp->cl_cb_ident, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| .rpc_argp = &setclientid, |
| .rpc_resp = res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| /* nfs_client_id4 */ |
| nfs4_init_boot_verifier(clp, &sc_verifier); |
| rcu_read_lock(); |
| setclientid.sc_name_len = scnprintf(setclientid.sc_name, |
| sizeof(setclientid.sc_name), "%s/%s %s", |
| clp->cl_ipaddr, |
| rpc_peeraddr2str(clp->cl_rpcclient, |
| RPC_DISPLAY_ADDR), |
| rpc_peeraddr2str(clp->cl_rpcclient, |
| RPC_DISPLAY_PROTO)); |
| /* cb_client4 */ |
| setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, |
| sizeof(setclientid.sc_netid), |
| rpc_peeraddr2str(clp->cl_rpcclient, |
| RPC_DISPLAY_NETID)); |
| rcu_read_unlock(); |
| setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
| clp->cl_ipaddr, port >> 8, port & 255); |
| |
| dprintk("NFS call setclientid auth=%s, '%.*s'\n", |
| clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| setclientid.sc_name_len, setclientid.sc_name); |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| dprintk("NFS reply setclientid: %d\n", status); |
| return status; |
| } |
| |
| /** |
| * nfs4_proc_setclientid_confirm - Confirm client ID |
| * @clp: state data structure |
| * @res: result of a previous SETCLIENTID |
| * @cred: RPC credential to use for this call |
| * |
| * Returns zero, a negative errno, or a negative NFS4ERR status code. |
| */ |
| int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
| struct nfs4_setclientid_res *arg, |
| struct rpc_cred *cred) |
| { |
| struct nfs_fsinfo fsinfo; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| .rpc_argp = arg, |
| .rpc_resp = &fsinfo, |
| .rpc_cred = cred, |
| }; |
| unsigned long now; |
| int status; |
| |
| dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", |
| clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| clp->cl_clientid); |
| now = jiffies; |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| if (status == 0) { |
| spin_lock(&clp->cl_lock); |
| clp->cl_lease_time = fsinfo.lease_time * HZ; |
| clp->cl_last_renewal = now; |
| spin_unlock(&clp->cl_lock); |
| } |
| dprintk("NFS reply setclientid_confirm: %d\n", status); |
| return status; |
| } |
| |
| struct nfs4_delegreturndata { |
| struct nfs4_delegreturnargs args; |
| struct nfs4_delegreturnres res; |
| struct nfs_fh fh; |
| nfs4_stateid stateid; |
| unsigned long timestamp; |
| struct nfs_fattr fattr; |
| int rpc_status; |
| }; |
| |
| static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_delegreturndata *data = calldata; |
| |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return; |
| |
| switch (task->tk_status) { |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| case 0: |
| renew_lease(data->res.server, data->timestamp); |
| break; |
| default: |
| if (nfs4_async_handle_error(task, data->res.server, NULL) == |
| -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| data->rpc_status = task->tk_status; |
| } |
| |
| static void nfs4_delegreturn_release(void *calldata) |
| { |
| kfree(calldata); |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_delegreturndata *d_data; |
| |
| d_data = (struct nfs4_delegreturndata *)data; |
| |
| if (nfs4_setup_sequence(d_data->res.server, |
| &d_data->args.seq_args, |
| &d_data->res.seq_res, task)) |
| return; |
| rpc_call_start(task); |
| } |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static const struct rpc_call_ops nfs4_delegreturn_ops = { |
| #if defined(CONFIG_NFS_V4_1) |
| .rpc_call_prepare = nfs4_delegreturn_prepare, |
| #endif /* CONFIG_NFS_V4_1 */ |
| .rpc_call_done = nfs4_delegreturn_done, |
| .rpc_release = nfs4_delegreturn_release, |
| }; |
| |
| static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| { |
| struct nfs4_delegreturndata *data; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
| .rpc_cred = cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_delegreturn_ops, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status = 0; |
| |
| data = kzalloc(sizeof(*data), GFP_NOFS); |
| if (data == NULL) |
| return -ENOMEM; |
| nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| data->args.fhandle = &data->fh; |
| data->args.stateid = &data->stateid; |
| data->args.bitmask = server->cache_consistency_bitmask; |
| nfs_copy_fh(&data->fh, NFS_FH(inode)); |
| nfs4_stateid_copy(&data->stateid, stateid); |
| data->res.fattr = &data->fattr; |
| data->res.server = server; |
| nfs_fattr_init(data->res.fattr); |
| data->timestamp = jiffies; |
| data->rpc_status = 0; |
| |
| task_setup_data.callback_data = data; |
| msg.rpc_argp = &data->args; |
| msg.rpc_resp = &data->res; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| if (!issync) |
| goto out; |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) |
| goto out; |
| status = data->rpc_status; |
| if (status == 0) |
| nfs_post_op_update_inode_force_wcc(inode, &data->fattr); |
| else |
| nfs_refresh_inode(inode, &data->fattr); |
| out: |
| rpc_put_task(task); |
| return status; |
| } |
| |
| int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
| switch (err) { |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| case 0: |
| return 0; |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| #define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
| #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
| |
| /* |
| * sleep, with exponential backoff, and retry the LOCK operation. |
| */ |
| static unsigned long |
| nfs4_set_lock_task_retry(unsigned long timeout) |
| { |
| freezable_schedule_timeout_killable(timeout); |
| timeout <<= 1; |
| if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| return NFS4_LOCK_MAXTIMEOUT; |
| return timeout; |
| } |
| |
| static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct inode *inode = state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_client *clp = server->nfs_client; |
| struct nfs_lockt_args arg = { |
| .fh = NFS_FH(inode), |
| .fl = request, |
| }; |
| struct nfs_lockt_res res = { |
| .denied = request, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct nfs4_lock_state *lsp; |
| int status; |
| |
| arg.lock_owner.clientid = clp->cl_clientid; |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| goto out; |
| lsp = request->fl_u.nfs4_fl.owner; |
| arg.lock_owner.id = lsp->ls_seqid.owner_id; |
| arg.lock_owner.s_dev = server->s_dev; |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| switch (status) { |
| case 0: |
| request->fl_type = F_UNLCK; |
| break; |
| case -NFS4ERR_DENIED: |
| status = 0; |
| } |
| request->fl_ops->fl_release_private(request); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| _nfs4_proc_getlk(state, cmd, request), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| { |
| int res = 0; |
| switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| case FL_POSIX: |
| res = posix_lock_file_wait(file, fl); |
| break; |
| case FL_FLOCK: |
| res = flock_lock_file_wait(file, fl); |
| break; |
| default: |
| BUG(); |
| } |
| return res; |
| } |
| |
| struct nfs4_unlockdata { |
| struct nfs_locku_args arg; |
| struct nfs_locku_res res; |
| struct nfs4_lock_state *lsp; |
| struct nfs_open_context *ctx; |
| struct file_lock fl; |
| const struct nfs_server *server; |
| unsigned long timestamp; |
| }; |
| |
| static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
| struct nfs_open_context *ctx, |
| struct nfs4_lock_state *lsp, |
| struct nfs_seqid *seqid) |
| { |
| struct nfs4_unlockdata *p; |
| struct inode *inode = lsp->ls_state->inode; |
| |
| p = kzalloc(sizeof(*p), GFP_NOFS); |
| if (p == NULL) |
| return NULL; |
| p->arg.fh = NFS_FH(inode); |
| p->arg.fl = &p->fl; |
| p->arg.seqid = seqid; |
| p->res.seqid = seqid; |
| p->arg.stateid = &lsp->ls_stateid; |
| p->lsp = lsp; |
| atomic_inc(&lsp->ls_count); |
| /* Ensure we don't close file until we're done freeing locks! */ |
| p->ctx = get_nfs_open_context(ctx); |
| memcpy(&p->fl, fl, sizeof(p->fl)); |
| p->server = NFS_SERVER(inode); |
| return p; |
| } |
| |
| static void nfs4_locku_release_calldata(void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| nfs_free_seqid(calldata->arg.seqid); |
| nfs4_put_lock_state(calldata->lsp); |
| put_nfs_open_context(calldata->ctx); |
| kfree(calldata); |
| } |
| |
| static void nfs4_locku_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| |
| if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| return; |
| switch (task->tk_status) { |
| case 0: |
| nfs4_stateid_copy(&calldata->lsp->ls_stateid, |
| &calldata->res.stateid); |
| renew_lease(calldata->server, calldata->timestamp); |
| break; |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| break; |
| default: |
| if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
| rpc_restart_call_prepare(task); |
| } |
| } |
| |
| static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| |
| if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| return; |
| if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { |
| /* Note: exit _without_ running nfs4_locku_done */ |
| task->tk_action = NULL; |
| return; |
| } |
| calldata->timestamp = jiffies; |
| if (nfs4_setup_sequence(calldata->server, |
| &calldata->arg.seq_args, |
| &calldata->res.seq_res, task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static const struct rpc_call_ops nfs4_locku_ops = { |
| .rpc_call_prepare = nfs4_locku_prepare, |
| .rpc_call_done = nfs4_locku_done, |
| .rpc_release = nfs4_locku_release_calldata, |
| }; |
| |
| static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
| struct nfs_open_context *ctx, |
| struct nfs4_lock_state *lsp, |
| struct nfs_seqid *seqid) |
| { |
| struct nfs4_unlockdata *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
| .rpc_cred = ctx->cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = NFS_CLIENT(lsp->ls_state->inode), |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_locku_ops, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| |
| /* Ensure this is an unlock - when canceling a lock, the |
| * canceled lock is passed in, and it won't be an unlock. |
| */ |
| fl->fl_type = F_UNLCK; |
| |
| data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
| if (data == NULL) { |
| nfs_free_seqid(seqid); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| task_setup_data.callback_data = data; |
| return rpc_run_task(&task_setup_data); |
| } |
| |
| static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_seqid *seqid; |
| struct nfs4_lock_state *lsp; |
| struct rpc_task *task; |
| int status = 0; |
| unsigned char fl_flags = request->fl_flags; |
| |
| status = nfs4_set_lock_state(state, request); |
| /* Unlock _before_ we do the RPC call */ |
| request->fl_flags |= FL_EXISTS; |
| down_read(&nfsi->rwsem); |
| if (do_vfs_lock(request->fl_file, request) == -ENOENT) { |
| up_read(&nfsi->rwsem); |
| goto out; |
| } |
| up_read(&nfsi->rwsem); |
| if (status != 0) |
| goto out; |
| /* Is this a delegated lock? */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| goto out; |
| lsp = request->fl_u.nfs4_fl.owner; |
| seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
| status = -ENOMEM; |
| if (seqid == NULL) |
| goto out; |
| task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
| status = PTR_ERR(task); |
| if (IS_ERR(task)) |
| goto out; |
| status = nfs4_wait_for_completion_rpc_task(task); |
| rpc_put_task(task); |
| out: |
| request->fl_flags = fl_flags; |
| return status; |
| } |
| |
| struct nfs4_lockdata { |
| struct nfs_lock_args arg; |
| struct nfs_lock_res res; |
| struct nfs4_lock_state *lsp; |
| struct nfs_open_context *ctx; |
| struct file_lock fl; |
| unsigned long timestamp; |
| int rpc_status; |
| int cancelled; |
| struct nfs_server *server; |
| }; |
| |
| static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, |
| struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
| gfp_t gfp_mask) |
| { |
| struct nfs4_lockdata *p; |
| struct inode *inode = lsp->ls_state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| |
| p = kzalloc(sizeof(*p), gfp_mask); |
| if (p == NULL) |
| return NULL; |
| |
| p->arg.fh = NFS_FH(inode); |
| p->arg.fl = &p->fl; |
| p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
| if (p->arg.open_seqid == NULL) |
| goto out_free; |
| p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); |
| if (p->arg.lock_seqid == NULL) |
| goto out_free_seqid; |
| p->arg.lock_stateid = &lsp->ls_stateid; |
| p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
| p->arg.lock_owner.id = lsp->ls_seqid.owner_id; |
| p->arg.lock_owner.s_dev = server->s_dev; |
| p->res.lock_seqid = p->arg.lock_seqid; |
| p->lsp = lsp; |
| p->server = server; |
| atomic_inc(&lsp->ls_count); |
| p->ctx = get_nfs_open_context(ctx); |
| memcpy(&p->fl, fl, sizeof(p->fl)); |
| return p; |
| out_free_seqid: |
| nfs_free_seqid(p->arg.open_seqid); |
| out_free: |
| kfree(p); |
| return NULL; |
| } |
| |
| static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_lockdata *data = calldata; |
| struct nfs4_state *state = data->lsp->ls_state; |
| |
| dprintk("%s: begin!\n", __func__); |
| if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
| return; |
| /* Do we need to do an open_to_lock_owner? */ |
| if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { |
| if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
| return; |
| data->arg.open_stateid = &state->stateid; |
| data->arg.new_lock_owner = 1; |
| data->res.open_seqid = data->arg.open_seqid; |
| } else |
| data->arg.new_lock_owner = 0; |
| data->timestamp = jiffies; |
| if (nfs4_setup_sequence(data->server, |
| &data->arg.seq_args, |
| &data->res.seq_res, task)) |
| return; |
| rpc_call_start(task); |
| dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
| } |
| |
| static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
| { |
| rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| nfs4_lock_prepare(task, calldata); |
| } |
| |
| static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_lockdata *data = calldata; |
| |
| dprintk("%s: begin!\n", __func__); |
| |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return; |
| |
| data->rpc_status = task->tk_status; |
| if (data->arg.new_lock_owner != 0) { |
| if (data->rpc_status == 0) |
| nfs_confirm_seqid(&data->lsp->ls_seqid, 0); |
| else |
| goto out; |
| } |
| if (data->rpc_status == 0) { |
| nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid); |
| set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags); |
| renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); |
| } |
| out: |
| dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
| } |
| |
| static void nfs4_lock_release(void *calldata) |
| { |
| struct nfs4_lockdata *data = calldata; |
| |
| dprintk("%s: begin!\n", __func__); |
| nfs_free_seqid(data->arg.open_seqid); |
| if (data->cancelled != 0) { |
| struct rpc_task *task; |
| task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, |
| data->arg.lock_seqid); |
| if (!IS_ERR(task)) |
| rpc_put_task_async(task); |
| dprintk("%s: cancelling lock!\n", __func__); |
| } else |
| nfs_free_seqid(data->arg.lock_seqid); |
| nfs4_put_lock_state(data->lsp); |
| put_nfs_open_context(data->ctx); |
| kfree(data); |
| dprintk("%s: done!\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_lock_ops = { |
| .rpc_call_prepare = nfs4_lock_prepare, |
| .rpc_call_done = nfs4_lock_done, |
| .rpc_release = nfs4_lock_release, |
| }; |
| |
| static const struct rpc_call_ops nfs4_recover_lock_ops = { |
| .rpc_call_prepare = nfs4_recover_lock_prepare, |
| .rpc_call_done = nfs4_lock_done, |
| .rpc_release = nfs4_lock_release, |
| }; |
| |
| static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
| { |
| switch (error) { |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| if (new_lock_owner != 0 || |
| test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) |
| nfs4_schedule_stateid_recovery(server, lsp->ls_state); |
| break; |
| case -NFS4ERR_STALE_STATEID: |
| lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_lease_recovery(server->nfs_client); |
| }; |
| } |
| |
| static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
| { |
| struct nfs4_lockdata *data; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = NFS_CLIENT(state->inode), |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_lock_ops, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int ret; |
| |
| dprintk("%s: begin!\n", __func__); |
| data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
| fl->fl_u.nfs4_fl.owner, |
| recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); |
| if (data == NULL) |
| return -ENOMEM; |
| if (IS_SETLKW(cmd)) |
| data->arg.block = 1; |
| if (recovery_type > NFS_LOCK_NEW) { |
| if (recovery_type == NFS_LOCK_RECLAIM) |
| data->arg.reclaim = NFS_LOCK_RECLAIM; |
| task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
| } |
| nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| task_setup_data.callback_data = data; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| ret = nfs4_wait_for_completion_rpc_task(task); |
| if (ret == 0) { |
| ret = data->rpc_status; |
| if (ret) |
| nfs4_handle_setlk_error(data->server, data->lsp, |
| data->arg.new_lock_owner, ret); |
| } else |
| data->cancelled = 1; |
| rpc_put_task(task); |
| dprintk("%s: done, ret = %d!\n", __func__, ret); |
| return ret; |
| } |
| |
| static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { |
| .inode = state->inode, |
| }; |
| int err; |
| |
| do { |
| /* Cache the lock if possible... */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| return 0; |
| err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { |
| .inode = state->inode, |
| }; |
| int err; |
| |
| err = nfs4_set_lock_state(state, request); |
| if (err != 0) |
| return err; |
| do { |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| return 0; |
| err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
| switch (err) { |
| default: |
| goto out; |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| nfs4_handle_exception(server, err, &exception); |
| err = 0; |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| /** |
| * nfs41_check_expired_locks - possibly free a lock stateid |
| * |
| * @state: NFSv4 state for an inode |
| * |
| * Returns NFS_OK if recovery for this stateid is now finished. |
| * Otherwise a negative NFS4ERR value is returned. |
| */ |
| static int nfs41_check_expired_locks(struct nfs4_state *state) |
| { |
| int status, ret = -NFS4ERR_BAD_STATEID; |
| struct nfs4_lock_state *lsp; |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| |
| list_for_each_entry(lsp, &state->lock_states, ls_locks) { |
| if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
| status = nfs41_test_stateid(server, &lsp->ls_stateid); |
| if (status != NFS_OK) { |
| /* Free the stateid unless the server |
| * informs us the stateid is unrecognized. */ |
| if (status != -NFS4ERR_BAD_STATEID) |
| nfs41_free_stateid(server, |
| &lsp->ls_stateid); |
| clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); |
| ret = status; |
| } |
| } |
| }; |
| |
| return ret; |
| } |
| |
| static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| { |
| int status = NFS_OK; |
| |
| if (test_bit(LK_STATE_IN_USE, &state->flags)) |
| status = nfs41_check_expired_locks(state); |
| if (status != NFS_OK) |
| status = nfs4_lock_expired(state, request); |
| return status; |
| } |
| #endif |
| |
| static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| unsigned char fl_flags = request->fl_flags; |
| int status = -ENOLCK; |
| |
| if ((fl_flags & FL_POSIX) && |
| !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) |
| goto out; |
| /* Is this a delegated open? */ |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| goto out; |
| request->fl_flags |= FL_ACCESS; |
| status = do_vfs_lock(request->fl_file, request); |
| if (status < 0) |
| goto out; |
| down_read(&nfsi->rwsem); |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| /* Yes: cache locks! */ |
| /* ...but avoid races with delegation recall... */ |
| request->fl_flags = fl_flags & ~FL_SLEEP; |
| status = do_vfs_lock(request->fl_file, request); |
| goto out_unlock; |
| } |
| status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
| if (status != 0) |
| goto out_unlock; |
| /* Note: we always want to sleep here! */ |
| request->fl_flags = fl_flags | FL_SLEEP; |
| if (do_vfs_lock(request->fl_file, request) < 0) |
| printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock " |
| "manager!\n", __func__); |
| out_unlock: |
| up_read(&nfsi->rwsem); |
| out: |
| request->fl_flags = fl_flags; |
| return status; |
| } |
| |
| static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_exception exception = { |
| .state = state, |
| .inode = state->inode, |
| }; |
| int err; |
| |
| do { |
| err = _nfs4_proc_setlk(state, cmd, request); |
| if (err == -NFS4ERR_DENIED) |
| err = -EAGAIN; |
| err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int |
| nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
| { |
| struct nfs_open_context *ctx; |
| struct nfs4_state *state; |
| unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
| int status; |
| |
| /* verify open state */ |
| ctx = nfs_file_open_context(filp); |
| state = ctx->state; |
| |
| if (request->fl_start < 0 || request->fl_end < 0) |
| return -EINVAL; |
| |
| if (IS_GETLK(cmd)) { |
| if (state != NULL) |
| return nfs4_proc_getlk(state, F_GETLK, request); |
| return 0; |
| } |
| |
| if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| return -EINVAL; |
| |
| if (request->fl_type == F_UNLCK) { |
| if (state != NULL) |
| return nfs4_proc_unlck(state, cmd, request); |
| return 0; |
| } |
| |
| if (state == NULL) |
| return -ENOLCK; |
| /* |
| * Don't rely on the VFS having checked the file open mode, |
| * since it won't do this for flock() locks. |
| */ |
| switch (request->fl_type) { |
| case F_RDLCK: |
| if (!(filp->f_mode & FMODE_READ)) |
| return -EBADF; |
| break; |
| case F_WRLCK: |
| if (!(filp->f_mode & FMODE_WRITE)) |
| return -EBADF; |
| } |
| |
| do { |
| status = nfs4_proc_setlk(state, cmd, request); |
| if ((status != -EAGAIN) || IS_SETLK(cmd)) |
| break; |
| timeout = nfs4_set_lock_task_retry(timeout); |
| status = -ERESTARTSYS; |
| if (signalled()) |
| break; |
| } while(status < 0); |
| return status; |
| } |
| |
| int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| err = nfs4_set_lock_state(state, fl); |
| if (err != 0) |
| goto out; |
| do { |
| err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
| switch (err) { |
| default: |
| printk(KERN_ERR "NFS: %s: unhandled error " |
| "%d.\n", __func__, err); |
| case 0: |
| case -ESTALE: |
| goto out; |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_stateid_recovery(server, state); |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_STALE_STATEID: |
| nfs4_schedule_lease_recovery(server->nfs_client); |
| goto out; |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_DEADSESSION: |
| nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); |
| goto out; |
| case -ERESTARTSYS: |
| /* |
| * The show must go on: exit, but mark the |
| * stateid as needing recovery. |
| */ |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OPENMODE: |
| nfs4_schedule_stateid_recovery(server, state); |
| err = 0; |
| goto out; |
| case -EKEYEXPIRED: |
| /* |
| * User RPCSEC_GSS context has expired. |
| * We cannot recover this stateid now, so |
| * skip it and allow recovery thread to |
| * proceed. |
| */ |
| err = 0; |
| goto out; |
| case -ENOMEM: |
| case -NFS4ERR_DENIED: |
| /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
| err = 0; |
| goto out; |
| case -NFS4ERR_DELAY: |
| break; |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| struct nfs_release_lockowner_data { |
| struct nfs4_lock_state *lsp; |
| struct nfs_server *server; |
| struct nfs_release_lockowner_args args; |
| }; |
| |
| static void nfs4_release_lockowner_release(void *calldata) |
| { |
| struct nfs_release_lockowner_data *data = calldata; |
| nfs4_free_lock_state(data->server, data->lsp); |
| kfree(calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_release_lockowner_ops = { |
| .rpc_release = nfs4_release_lockowner_release, |
| }; |
| |
| int nfs4_release_lockowner(struct nfs4_lock_state *lsp) |
| { |
| struct nfs_server *server = lsp->ls_state->owner->so_server; |
| struct nfs_release_lockowner_data *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], |
| }; |
| |
| if (server->nfs_client->cl_mvops->minor_version != 0) |
| return -EINVAL; |
| data = kmalloc(sizeof(*data), GFP_NOFS); |
| if (!data) |
| return -ENOMEM; |
| data->lsp = lsp; |
| data->server = server; |
| data->args.lock_owner.clientid = server->nfs_client->cl_clientid; |
| data->args.lock_owner.id = lsp->ls_seqid.owner_id; |
| data->args.lock_owner.s_dev = server->s_dev; |
| msg.rpc_argp = &data->args; |
| rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); |
| return 0; |
| } |
| |
| #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| |
| static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, |
| const void *buf, size_t buflen, |
| int flags, int type) |
| { |
| if (strcmp(key, "") != 0) |
| return -EINVAL; |
| |
| return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); |
| } |
| |
| static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, |
| void *buf, size_t buflen, int type) |
| { |
| if (strcmp(key, "") != 0) |
| return -EINVAL; |
| |
| return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); |
| } |
| |
| static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, |
| size_t list_len, const char *name, |
| size_t name_len, int type) |
| { |
| size_t len = sizeof(XATTR_NAME_NFSV4_ACL); |
| |
| if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
| return 0; |
| |
| if (list && len <= list_len) |
| memcpy(list, XATTR_NAME_NFSV4_ACL, len); |
| return len; |
| } |
| |
| /* |
| * nfs_fhget will use either the mounted_on_fileid or the fileid |
| */ |
| static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
| { |
| if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || |
| (fattr->valid & NFS_ATTR_FATTR_FILEID)) && |
| (fattr->valid & NFS_ATTR_FATTR_FSID) && |
| (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) |
| return; |
| |
| fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; |
| fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| fattr->nlink = 2; |
| } |
| |
| static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, |
| const struct qstr *name, |
| struct nfs4_fs_locations *fs_locations, |
| struct page *page) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| u32 bitmask[2] = { |
| [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| }; |
| struct nfs4_fs_locations_arg args = { |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| .page = page, |
| .bitmask = bitmask, |
| }; |
| struct nfs4_fs_locations_res res = { |
| .fs_locations = fs_locations, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("%s: start\n", __func__); |
| |
| /* Ask for the fileid of the absent filesystem if mounted_on_fileid |
| * is not supported */ |
| if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) |
| bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; |
| else |
| bitmask[0] |= FATTR4_WORD0_FILEID; |
| |
| nfs_fattr_init(&fs_locations->fattr); |
| fs_locations->server = server; |
| fs_locations->nlocations = 0; |
| status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| dprintk("%s: returned status = %d\n", __func__, status); |
| return status; |
| } |
| |
| int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, |
| const struct qstr *name, |
| struct nfs4_fs_locations *fs_locations, |
| struct page *page) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_fs_locations(client, dir, name, fs_locations, page), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors) |
| { |
| int status; |
| struct nfs4_secinfo_arg args = { |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| }; |
| struct nfs4_secinfo_res res = { |
| .flavors = flavors, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| dprintk("NFS call secinfo %s\n", name->name); |
| status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); |
| dprintk("NFS reply secinfo: %d\n", status); |
| return status; |
| } |
| |
| int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, |
| struct nfs4_secinfo_flavors *flavors) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_secinfo(dir, name, flavors), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| #ifdef CONFIG_NFS_V4_1 |
| /* |
| * Check the exchange flags returned by the server for invalid flags, having |
| * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or |
| * DS flags set. |
| */ |
| static int nfs4_check_cl_exchange_flags(u32 flags) |
| { |
| if (flags & ~EXCHGID4_FLAG_MASK_R) |
| goto out_inval; |
| if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && |
| (flags & EXCHGID4_FLAG_USE_NON_PNFS)) |
| goto out_inval; |
| if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) |
| goto out_inval; |
| return NFS_OK; |
| out_inval: |
| return -NFS4ERR_INVAL; |
| } |
| |
| static bool |
| nfs41_same_server_scope(struct nfs41_server_scope *a, |
| struct nfs41_server_scope *b) |
| { |
| if (a->server_scope_sz == b->server_scope_sz && |
| memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) |
| return true; |
| |
| return false; |
| } |
| |
| /* |
| * nfs4_proc_bind_conn_to_session() |
| * |
| * The 4.1 client currently uses the same TCP connection for the |
| * fore and backchannel. |
| */ |
| int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| int status; |
| struct nfs41_bind_conn_to_session_res res; |
| struct rpc_message msg = { |
| .rpc_proc = |
| &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], |
| .rpc_argp = clp, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| |
| dprintk("--> %s\n", __func__); |
| BUG_ON(clp == NULL); |
| |
| res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
| if (unlikely(res.session == NULL)) { |
| status = -ENOMEM; |
| goto out; |
| } |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| if (status == 0) { |
| if (memcmp(res.session->sess_id.data, |
| clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { |
| dprintk("NFS: %s: Session ID mismatch\n", __func__); |
| status = -EIO; |
| goto out_session; |
| } |
| if (res.dir != NFS4_CDFS4_BOTH) { |
| dprintk("NFS: %s: Unexpected direction from server\n", |
| __func__); |
| status = -EIO; |
| goto out_session; |
| } |
| if (res.use_conn_in_rdma_mode) { |
| dprintk("NFS: %s: Server returned RDMA mode = true\n", |
| __func__); |
| status = -EIO; |
| goto out_session; |
| } |
| } |
| out_session: |
| kfree(res.session); |
| out: |
| dprintk("<-- %s status= %d\n", __func__, status); |
| return status; |
| } |
| |
| /* |
| * nfs4_proc_exchange_id() |
| * |
| * Returns zero, a negative errno, or a negative NFS4ERR status code. |
| * |
| * Since the clientid has expired, all compounds using sessions |
| * associated with the stale clientid will be returning |
| * NFS4ERR_BADSESSION in the sequence operation, and will therefore |
| * be in some phase of session reset. |
| */ |
| int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| nfs4_verifier verifier; |
| struct nfs41_exchange_id_args args = { |
| .verifier = &verifier, |
| .client = clp, |
| .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER, |
| }; |
| struct nfs41_exchange_id_res res = { |
| 0 |
| }; |
| int status; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| |
| nfs4_init_boot_verifier(clp, &verifier); |
| args.id_len = scnprintf(args.id, sizeof(args.id), |
| "%s/%s", |
| clp->cl_ipaddr, |
| clp->cl_rpcclient->cl_nodename); |
| dprintk("NFS call exchange_id auth=%s, '%.*s'\n", |
| clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| args.id_len, args.id); |
| |
| res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), |
| GFP_NOFS); |
| if (unlikely(res.server_owner == NULL)) { |
| status = -ENOMEM; |
| goto out; |
| } |
| |
| res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), |
| GFP_NOFS); |
| if (unlikely(res.server_scope == NULL)) { |
| status = -ENOMEM; |
| goto out_server_owner; |
| } |
| |
| res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); |
| if (unlikely(res.impl_id == NULL)) { |
| status = -ENOMEM; |
| goto out_server_scope; |
| } |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| if (status == 0) |
| status = nfs4_check_cl_exchange_flags(res.flags); |
| |
| if (status == 0) { |
| clp->cl_clientid = res.clientid; |
| clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R); |
| if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) |
| clp->cl_seqid = res.seqid; |
| |
| kfree(clp->cl_serverowner); |
| clp->cl_serverowner = res.server_owner; |
| res.server_owner = NULL; |
| |
| /* use the most recent implementation id */ |
| kfree(clp->cl_implid); |
| clp->cl_implid = res.impl_id; |
| |
| if (clp->cl_serverscope != NULL && |
| !nfs41_same_server_scope(clp->cl_serverscope, |
| res.server_scope)) { |
| dprintk("%s: server_scope mismatch detected\n", |
| __func__); |
| set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); |
| kfree(clp->cl_serverscope); |
| clp->cl_serverscope = NULL; |
| } |
| |
| if (clp->cl_serverscope == NULL) { |
| clp->cl_serverscope = res.server_scope; |
| goto out; |
| } |
| } else |
| kfree(res.impl_id); |
| |
| out_server_owner: |
| kfree(res.server_owner); |
| out_server_scope: |
| kfree(res.server_scope); |
| out: |
| if (clp->cl_implid != NULL) |
| dprintk("NFS reply exchange_id: Server Implementation ID: " |
| "domain: %s, name: %s, date: %llu,%u\n", |
| clp->cl_implid->domain, clp->cl_implid->name, |
| clp->cl_implid->date.seconds, |
| clp->cl_implid->date.nseconds); |
| dprintk("NFS reply exchange_id: %d\n", status); |
| return status; |
| } |
| |
| static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], |
| .rpc_argp = clp, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| if (status) |
| dprintk("NFS: Got error %d from the server %s on " |
| "DESTROY_CLIENTID.", status, clp->cl_hostname); |
| return status; |
| } |
| |
| static int nfs4_proc_destroy_clientid(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| unsigned int loop; |
| int ret; |
| |
| for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| ret = _nfs4_proc_destroy_clientid(clp, cred); |
| switch (ret) { |
| case -NFS4ERR_DELAY: |
| case -NFS4ERR_CLIENTID_BUSY: |
| ssleep(1); |
| break; |
| default: |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| int nfs4_destroy_clientid(struct nfs_client *clp) |
| { |
| struct rpc_cred *cred; |
| int ret = 0; |
| |
| if (clp->cl_mvops->minor_version < 1) |
| goto out; |
| if (clp->cl_exchange_flags == 0) |
| goto out; |
| cred = nfs4_get_exchange_id_cred(clp); |
| ret = nfs4_proc_destroy_clientid(clp, cred); |
| if (cred) |
| put_rpccred(cred); |
| switch (ret) { |
| case 0: |
| case -NFS4ERR_STALE_CLIENTID: |
| clp->cl_exchange_flags = 0; |
| } |
| out: |
| return ret; |
| } |
| |
| struct nfs4_get_lease_time_data { |
| struct nfs4_get_lease_time_args *args; |
| struct nfs4_get_lease_time_res *res; |
| struct nfs_client *clp; |
| }; |
| |
| static void nfs4_get_lease_time_prepare(struct rpc_task *task, |
| void *calldata) |
| { |
| int ret; |
| struct nfs4_get_lease_time_data *data = |
| (struct nfs4_get_lease_time_data *)calldata; |
| |
| dprintk("--> %s\n", __func__); |
| rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| /* just setup sequence, do not trigger session recovery |
| since we're invoked within one */ |
| ret = nfs41_setup_sequence(data->clp->cl_session, |
| &data->args->la_seq_args, |
| &data->res->lr_seq_res, task); |
| |
| BUG_ON(ret == -EAGAIN); |
| rpc_call_start(task); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| /* |
| * Called from nfs4_state_manager thread for session setup, so don't recover |
| * from sequence operation or clientid errors. |
| */ |
| static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_get_lease_time_data *data = |
| (struct nfs4_get_lease_time_data *)calldata; |
| |
| dprintk("--> %s\n", __func__); |
| if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) |
| return; |
| switch (task->tk_status) { |
| case -NFS4ERR_DELAY: |
| case -NFS4ERR_GRACE: |
| dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
| rpc_delay(task, NFS4_POLL_RETRY_MIN); |
| task->tk_status = 0; |
| /* fall through */ |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_get_lease_time_ops = { |
| .rpc_call_prepare = nfs4_get_lease_time_prepare, |
| .rpc_call_done = nfs4_get_lease_time_done, |
| }; |
| |
| int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) |
| { |
| struct rpc_task *task; |
| struct nfs4_get_lease_time_args args; |
| struct nfs4_get_lease_time_res res = { |
| .lr_fsinfo = fsinfo, |
| }; |
| struct nfs4_get_lease_time_data data = { |
| .args = &args, |
| .res = &res, |
| .clp = clp, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| struct rpc_task_setup task_setup = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_get_lease_time_ops, |
| .callback_data = &data, |
| .flags = RPC_TASK_TIMEOUT, |
| }; |
| int status; |
| |
| nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); |
| dprintk("--> %s\n", __func__); |
| task = rpc_run_task(&task_setup); |
| |
| if (IS_ERR(task)) |
| status = PTR_ERR(task); |
| else { |
| status = task->tk_status; |
| rpc_put_task(task); |
| } |
| dprintk("<-- %s return %d\n", __func__, status); |
| |
| return status; |
| } |
| |
| static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags) |
| { |
| return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags); |
| } |
| |
| static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl, |
| struct nfs4_slot *new, |
| u32 max_slots, |
| u32 ivalue) |
| { |
| struct nfs4_slot *old = NULL; |
| u32 i; |
| |
| spin_lock(&tbl->slot_tbl_lock); |
| if (new) { |
| old = tbl->slots; |
| tbl->slots = new; |
| tbl->max_slots = max_slots; |
| } |
| tbl->highest_used_slotid = -1; /* no slot is currently used */ |
| for (i = 0; i < tbl->max_slots; i++) |
| tbl->slots[i].seq_nr = ivalue; |
| spin_unlock(&tbl->slot_tbl_lock); |
| kfree(old); |
| } |
| |
| /* |
| * (re)Initialise a slot table |
| */ |
| static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
| u32 ivalue) |
| { |
| struct nfs4_slot *new = NULL; |
| int ret = -ENOMEM; |
| |
| dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
| max_reqs, tbl->max_slots); |
| |
| /* Does the newly negotiated max_reqs match the existing slot table? */ |
| if (max_reqs != tbl->max_slots) { |
| new = nfs4_alloc_slots(max_reqs, GFP_NOFS); |
| if (!new) |
| goto out; |
| } |
| ret = 0; |
| |
| nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue); |
| dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, |
| tbl, tbl->slots, tbl->max_slots); |
| out: |
| dprintk("<-- %s: return %d\n", __func__, ret); |
| return ret; |
| } |
| |
| /* Destroy the slot table */ |
| static void nfs4_destroy_slot_tables(struct nfs4_session *session) |
| { |
| if (session->fc_slot_table.slots != NULL) { |
| kfree(session->fc_slot_table.slots); |
| session->fc_slot_table.slots = NULL; |
| } |
| if (session->bc_slot_table.slots != NULL) { |
| kfree(session->bc_slot_table.slots); |
| session->bc_slot_table.slots = NULL; |
| } |
| return; |
| } |
| |
| /* |
| * Initialize or reset the forechannel and backchannel tables |
| */ |
| static int nfs4_setup_session_slot_tables(struct nfs4_session *ses) |
| { |
| struct nfs4_slot_table *tbl; |
| int status; |
| |
| dprintk("--> %s\n", __func__); |
| /* Fore channel */ |
| tbl = &ses->fc_slot_table; |
| status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1); |
| if (status) /* -ENOMEM */ |
| return status; |
| /* Back channel */ |
| tbl = &ses->bc_slot_table; |
| status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0); |
| if (status && tbl->slots == NULL) |
| /* Fore and back channel share a connection so get |
| * both slot tables or neither */ |
| nfs4_destroy_slot_tables(ses); |
| return status; |
| } |
| |
| struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) |
| { |
| struct nfs4_session *session; |
| struct nfs4_slot_table *tbl; |
| |
| session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
| if (!session) |
| return NULL; |
| |
| tbl = &session->fc_slot_table; |
| tbl->highest_used_slotid = NFS4_NO_SLOT; |
| spin_lock_init(&tbl->slot_tbl_lock); |
| rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
| init_completion(&tbl->complete); |
| |
| tbl = &session->bc_slot_table; |
| tbl->highest_used_slotid = NFS4_NO_SLOT; |
| spin_lock_init(&tbl->slot_tbl_lock); |
| rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); |
| init_completion(&tbl->complete); |
| |
| session->session_state = 1<<NFS4_SESSION_INITING; |
| |
| session->clp = clp; |
| return session; |
| } |
| |
| void nfs4_destroy_session(struct nfs4_session *session) |
| { |
| struct rpc_xprt *xprt; |
| struct rpc_cred *cred; |
| |
| cred = nfs4_get_exchange_id_cred(session->clp); |
| nfs4_proc_destroy_session(session, cred); |
| if (cred) |
| put_rpccred(cred); |
| |
| rcu_read_lock(); |
| xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt); |
| rcu_read_unlock(); |
| dprintk("%s Destroy backchannel for xprt %p\n", |
| __func__, xprt); |
| xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); |
| nfs4_destroy_slot_tables(session); |
| kfree(session); |
| } |
| |
| /* |
| * Initialize the values to be used by the client in CREATE_SESSION |
| * If nfs4_init_session set the fore channel request and response sizes, |
| * use them. |
| * |
| * Set the back channel max_resp_sz_cached to zero to force the client to |
| * always set csa_cachethis to FALSE because the current implementation |
| * of the back channel DRC only supports caching the CB_SEQUENCE operation. |
| */ |
| static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) |
| { |
| struct nfs4_session *session = args->client->cl_session; |
| unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, |
| mxresp_sz = session->fc_attrs.max_resp_sz; |
| |
| if (mxrqst_sz == 0) |
| mxrqst_sz = NFS_MAX_FILE_IO_SIZE; |
| if (mxresp_sz == 0) |
| mxresp_sz = NFS_MAX_FILE_IO_SIZE; |
| /* Fore channel attributes */ |
| args->fc_attrs.max_rqst_sz = mxrqst_sz; |
| args->fc_attrs.max_resp_sz = mxresp_sz; |
| args->fc_attrs.max_ops = NFS4_MAX_OPS; |
| args->fc_attrs.max_reqs = max_session_slots; |
| |
| dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " |
| "max_ops=%u max_reqs=%u\n", |
| __func__, |
| args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, |
| args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
| |
| /* Back channel attributes */ |
| args->bc_attrs.max_rqst_sz = PAGE_SIZE; |
| args->bc_attrs.max_resp_sz = PAGE_SIZE; |
| args->bc_attrs.max_resp_sz_cached = 0; |
| args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; |
| args->bc_attrs.max_reqs = 1; |
| |
| dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " |
| "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", |
| __func__, |
| args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, |
| args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, |
| args->bc_attrs.max_reqs); |
| } |
| |
| static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) |
| { |
| struct nfs4_channel_attrs *sent = &args->fc_attrs; |
| struct nfs4_channel_attrs *rcvd = &session->fc_attrs; |
| |
| if (rcvd->max_resp_sz > sent->max_resp_sz) |
| return -EINVAL; |
| /* |
| * Our requested max_ops is the minimum we need; we're not |
| * prepared to break up compounds into smaller pieces than that. |
| * So, no point even trying to continue if the server won't |
| * cooperate: |
| */ |
| if (rcvd->max_ops < sent->max_ops) |
| return -EINVAL; |
| if (rcvd->max_reqs == 0) |
| return -EINVAL; |
| if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) |
| rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; |
| return 0; |
| } |
| |
| static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) |
| { |
| struct nfs4_channel_attrs *sent = &args->bc_attrs; |
| struct nfs4_channel_attrs *rcvd = &session->bc_attrs; |
| |
| if (rcvd->max_rqst_sz > sent->max_rqst_sz) |
| return -EINVAL; |
| if (rcvd->max_resp_sz < sent->max_resp_sz) |
| return -EINVAL; |
| if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) |
| return -EINVAL; |
| /* These would render the backchannel useless: */ |
| if (rcvd->max_ops != sent->max_ops) |
| return -EINVAL; |
| if (rcvd->max_reqs != sent->max_reqs) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, |
| struct nfs4_session *session) |
| { |
| int ret; |
| |
| ret = nfs4_verify_fore_channel_attrs(args, session); |
| if (ret) |
| return ret; |
| return nfs4_verify_back_channel_attrs(args, session); |
| } |
| |
| static int _nfs4_proc_create_session(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| struct nfs4_session *session = clp->cl_session; |
| struct nfs41_create_session_args args = { |
| .client = clp, |
| .cb_program = NFS4_CALLBACK, |
| }; |
| struct nfs41_create_session_res res = { |
| .client = clp, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| nfs4_init_channel_attrs(&args); |
| args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
| |
| status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| |
| if (!status) |
| /* Verify the session's negotiated channel_attrs values */ |
| status = nfs4_verify_channel_attrs(&args, session); |
| if (!status) { |
| /* Increment the clientid slot sequence id */ |
| clp->cl_seqid++; |
| } |
| |
| return status; |
| } |
| |
| /* |
| * Issues a CREATE_SESSION operation to the server. |
| * It is the responsibility of the caller to verify the session is |
| * expired before calling this routine. |
| */ |
| int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| int status; |
| unsigned *ptr; |
| struct nfs4_session *session = clp->cl_session; |
| |
| dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); |
| |
| status = _nfs4_proc_create_session(clp, cred); |
| if (status) |
| goto out; |
| |
| /* Init or reset the session slot tables */ |
| status = nfs4_setup_session_slot_tables(session); |
| dprintk("slot table setup returned %d\n", status); |
| if (status) |
| goto out; |
| |
| ptr = (unsigned *)&session->sess_id.data[0]; |
| dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, |
| clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); |
| out: |
| dprintk("<-- %s\n", __func__); |
| return status; |
| } |
| |
| /* |
| * Issue the over-the-wire RPC DESTROY_SESSION. |
| * The caller must serialize access to this routine. |
| */ |
| int nfs4_proc_destroy_session(struct nfs4_session *session, |
| struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], |
| .rpc_argp = session, |
| .rpc_cred = cred, |
| }; |
| int status = 0; |
| |
| dprintk("--> nfs4_proc_destroy_session\n"); |
| |
| /* session is still being setup */ |
| if (session->clp->cl_cons_state != NFS_CS_READY) |
| return status; |
| |
| status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| |
| if (status) |
| dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " |
| "Session has been destroyed regardless...\n", status); |
| |
| dprintk("<-- nfs4_proc_destroy_session\n"); |
| return status; |
| } |
| |
| /* |
| * With sessions, the client is not marked ready until after a |
| * successful EXCHANGE_ID and CREATE_SESSION. |
| * |
| * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate |
| * other versions of NFS can be tried. |
| */ |
| static int nfs41_check_session_ready(struct nfs_client *clp) |
| { |
| int ret; |
| |
| if (clp->cl_cons_state == NFS_CS_SESSION_INITING) { |
| ret = nfs4_client_recover_expired_lease(clp); |
| if (ret) |
| return ret; |
| } |
| if (clp->cl_cons_state < NFS_CS_READY) |
| return -EPROTONOSUPPORT; |
| smp_rmb(); |
| return 0; |
| } |
| |
| int nfs4_init_session(struct nfs_server *server) |
| { |
| struct nfs_client *clp = server->nfs_client; |
| struct nfs4_session *session; |
| unsigned int rsize, wsize; |
| |
| if (!nfs4_has_session(clp)) |
| return 0; |
| |
| session = clp->cl_session; |
| spin_lock(&clp->cl_lock); |
| if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { |
| |
| rsize = server->rsize; |
| if (rsize == 0) |
| rsize = NFS_MAX_FILE_IO_SIZE; |
| wsize = server->wsize; |
| if (wsize == 0) |
| wsize = NFS_MAX_FILE_IO_SIZE; |
| |
| session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
| session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; |
| } |
| spin_unlock(&clp->cl_lock); |
| |
| return nfs41_check_session_ready(clp); |
| } |
| |
| int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time) |
| { |
| struct nfs4_session *session = clp->cl_session; |
| int ret; |
| |
| spin_lock(&clp->cl_lock); |
| if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { |
| /* |
| * Do not set NFS_CS_CHECK_LEASE_TIME instead set the |
| * DS lease to be equal to the MDS lease. |
| */ |
| clp->cl_lease_time = lease_time; |
| clp->cl_last_renewal = jiffies; |
| } |
| spin_unlock(&clp->cl_lock); |
| |
| ret = nfs41_check_session_ready(clp); |
| if (ret) |
| return ret; |
| /* Test for the DS role */ |
| if (!is_ds_client(clp)) |
| return -ENODEV; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nfs4_init_ds_session); |
| |
| |
| /* |
| * Renew the cl_session lease. |
| */ |
| struct nfs4_sequence_data { |
| struct nfs_client *clp; |
| struct nfs4_sequence_args args; |
| struct nfs4_sequence_res res; |
| }; |
| |
| static void nfs41_sequence_release(void *data) |
| { |
| struct nfs4_sequence_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| |
| if (atomic_read(&clp->cl_count) > 1) |
| nfs4_schedule_state_renewal(clp); |
| nfs_put_client(clp); |
| kfree(calldata); |
| } |
| |
| static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| { |
| switch(task->tk_status) { |
| case -NFS4ERR_DELAY: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| return -EAGAIN; |
| default: |
| nfs4_schedule_lease_recovery(clp); |
| } |
| return 0; |
| } |
| |
| static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_sequence_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| |
| if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
| return; |
| |
| if (task->tk_status < 0) { |
| dprintk("%s ERROR %d\n", __func__, task->tk_status); |
| if (atomic_read(&clp->cl_count) == 1) |
| goto out; |
| |
| if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
| out: |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static void nfs41_sequence_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_sequence_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| struct nfs4_sequence_args *args; |
| struct nfs4_sequence_res *res; |
| |
| args = task->tk_msg.rpc_argp; |
| res = task->tk_msg.rpc_resp; |
| |
| if (nfs41_setup_sequence(clp->cl_session, args, res, task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static const struct rpc_call_ops nfs41_sequence_ops = { |
| .rpc_call_done = nfs41_sequence_call_done, |
| .rpc_call_prepare = nfs41_sequence_prepare, |
| .rpc_release = nfs41_sequence_release, |
| }; |
| |
| static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| struct nfs4_sequence_data *calldata; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], |
| .rpc_cred = cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs41_sequence_ops, |
| .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, |
| }; |
| |
| if (!atomic_inc_not_zero(&clp->cl_count)) |
| return ERR_PTR(-EIO); |
| calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| if (calldata == NULL) { |
| nfs_put_client(clp); |
| return ERR_PTR(-ENOMEM); |
| } |
| nfs41_init_sequence(&calldata->args, &calldata->res, 0); |
| msg.rpc_argp = &calldata->args; |
| msg.rpc_resp = &calldata->res; |
| calldata->clp = clp; |
| task_setup_data.callback_data = calldata; |
| |
| return rpc_run_task(&task_setup_data); |
| } |
| |
| static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) |
| { |
| struct rpc_task *task; |
| int ret = 0; |
| |
| if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) |
| return 0; |
| task = _nfs41_proc_sequence(clp, cred); |
| if (IS_ERR(task)) |
| ret = PTR_ERR(task); |
| else |
| rpc_put_task_async(task); |
| dprintk("<-- %s status=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| struct rpc_task *task; |
| int ret; |
| |
| task = _nfs41_proc_sequence(clp, cred); |
| if (IS_ERR(task)) { |
| ret = PTR_ERR(task); |
| goto out; |
| } |
| ret = rpc_wait_for_completion_task(task); |
| if (!ret) { |
| struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; |
| |
| if (task->tk_status == 0) |
| nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); |
| ret = task->tk_status; |
| } |
| rpc_put_task(task); |
| out: |
| dprintk("<-- %s status=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| struct nfs4_reclaim_complete_data { |
| struct nfs_client *clp; |
| struct nfs41_reclaim_complete_args arg; |
| struct nfs41_reclaim_complete_res res; |
| }; |
| |
| static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_reclaim_complete_data *calldata = data; |
| |
| rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| if (nfs41_setup_sequence(calldata->clp->cl_session, |
| &calldata->arg.seq_args, |
| &calldata->res.seq_res, task)) |
| return; |
| |
| rpc_call_start(task); |
| } |
| |
| static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| { |
| switch(task->tk_status) { |
| case 0: |
| case -NFS4ERR_COMPLETE_ALREADY: |
| case -NFS4ERR_WRONG_CRED: /* What to do here? */ |
| break; |
| case -NFS4ERR_DELAY: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| /* fall through */ |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| return -EAGAIN; |
| default: |
| nfs4_schedule_lease_recovery(clp); |
| } |
| return 0; |
| } |
| |
| static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_reclaim_complete_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| struct nfs4_sequence_res *res = &calldata->res.seq_res; |
| |
| dprintk("--> %s\n", __func__); |
| if (!nfs41_sequence_done(task, res)) |
| return; |
| |
| if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static void nfs4_free_reclaim_complete_data(void *data) |
| { |
| struct nfs4_reclaim_complete_data *calldata = data; |
| |
| kfree(calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { |
| .rpc_call_prepare = nfs4_reclaim_complete_prepare, |
| .rpc_call_done = nfs4_reclaim_complete_done, |
| .rpc_release = nfs4_free_reclaim_complete_data, |
| }; |
| |
| /* |
| * Issue a global reclaim complete. |
| */ |
| static int nfs41_proc_reclaim_complete(struct nfs_client *clp) |
| { |
| struct nfs4_reclaim_complete_data *calldata; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_reclaim_complete_call_ops, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("--> %s\n", __func__); |
| calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| if (calldata == NULL) |
| goto out; |
| calldata->clp = clp; |
| calldata->arg.one_fs = 0; |
| |
| nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); |
| msg.rpc_argp = &calldata->arg; |
| msg.rpc_resp = &calldata->res; |
| task_setup_data.callback_data = calldata; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) { |
| status = PTR_ERR(task); |
| goto out; |
| } |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status == 0) |
| status = task->tk_status; |
| rpc_put_task(task); |
| return 0; |
| out: |
| dprintk("<-- %s status=%d\n", __func__, status); |
| return status; |
| } |
| |
| static void |
| nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutget *lgp = calldata; |
| struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| |
| dprintk("--> %s\n", __func__); |
| /* Note the is a race here, where a CB_LAYOUTRECALL can come in |
| * right now covering the LAYOUTGET we are about to send. |
| * However, that is not so catastrophic, and there seems |
| * to be no way to prevent it completely. |
| */ |
| if (nfs4_setup_sequence(server, &lgp->args.seq_args, |
| &lgp->res.seq_res, task)) |
| return; |
| if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, |
| NFS_I(lgp->args.inode)->layout, |
| lgp->args.ctx->state)) { |
| rpc_exit(task, NFS4_OK); |
| return; |
| } |
| rpc_call_start(task); |
| } |
| |
| static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutget *lgp = calldata; |
| struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| |
| dprintk("--> %s\n", __func__); |
| |
| if (!nfs4_sequence_done(task, &lgp->res.seq_res)) |
| return; |
| |
| switch (task->tk_status) { |
| case 0: |
| break; |
| case -NFS4ERR_LAYOUTTRYLATER: |
| case -NFS4ERR_RECALLCONFLICT: |
| task->tk_status = -NFS4ERR_DELAY; |
| /* Fall through */ |
| default: |
| if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static size_t max_response_pages(struct nfs_server *server) |
| { |
| u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; |
| return nfs_page_array_len(0, max_resp_sz); |
| } |
| |
| static void nfs4_free_pages(struct page **pages, size_t size) |
| { |
| int i; |
| |
| if (!pages) |
| return; |
| |
| for (i = 0; i < size; i++) { |
| if (!pages[i]) |
| break; |
| __free_page(pages[i]); |
| } |
| kfree(pages); |
| } |
| |
| static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) |
| { |
| struct page **pages; |
| int i; |
| |
| pages = kcalloc(size, sizeof(struct page *), gfp_flags); |
| if (!pages) { |
| dprintk("%s: can't alloc array of %zu pages\n", __func__, size); |
| return NULL; |
| } |
| |
| for (i = 0; i < size; i++) { |
| pages[i] = alloc_page(gfp_flags); |
| if (!pages[i]) { |
| dprintk("%s: failed to allocate page\n", __func__); |
| nfs4_free_pages(pages, size); |
| return NULL; |
| } |
| } |
| |
| return pages; |
| } |
| |
| static void nfs4_layoutget_release(void *calldata) |
| { |
| struct nfs4_layoutget *lgp = calldata; |
| struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| size_t max_pages = max_response_pages(server); |
| |
| dprintk("--> %s\n", __func__); |
| nfs4_free_pages(lgp->args.layout.pages, max_pages); |
| put_nfs_open_context(lgp->args.ctx); |
| kfree(calldata); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_layoutget_call_ops = { |
| .rpc_call_prepare = nfs4_layoutget_prepare, |
| .rpc_call_done = nfs4_layoutget_done, |
| .rpc_release = nfs4_layoutget_release, |
| }; |
| |
| struct pnfs_layout_segment * |
| nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) |
| { |
| struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| size_t max_pages = max_response_pages(server); |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], |
| .rpc_argp = &lgp->args, |
| .rpc_resp = &lgp->res, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_layoutget_call_ops, |
| .callback_data = lgp, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| struct pnfs_layout_segment *lseg = NULL; |
| int status = 0; |
| |
| dprintk("--> %s\n", __func__); |
| |
| lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); |
| if (!lgp->args.layout.pages) { |
| nfs4_layoutget_release(lgp); |
| return ERR_PTR(-ENOMEM); |
| } |
| lgp->args.layout.pglen = max_pages * PAGE_SIZE; |
| |
| lgp->res.layoutp = &lgp->args.layout; |
| lgp->res.seq_res.sr_slot = NULL; |
| nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return ERR_CAST(task); |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status == 0) |
| status = task->tk_status; |
| if (status == 0) |
| lseg = pnfs_layout_process(lgp); |
| rpc_put_task(task); |
| dprintk("<-- %s status=%d\n", __func__, status); |
| if (status) |
| return ERR_PTR(status); |
| return lseg; |
| } |
| |
| static void |
| nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutreturn *lrp = calldata; |
| |
| dprintk("--> %s\n", __func__); |
| if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args, |
| &lrp->res.seq_res, task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutreturn *lrp = calldata; |
| struct nfs_server *server; |
| struct pnfs_layout_hdr *lo = lrp->args.layout; |
| |
| dprintk("--> %s\n", __func__); |
| |
| if (!nfs4_sequence_done(task, &lrp->res.seq_res)) |
| return; |
| |
| server = NFS_SERVER(lrp->args.inode); |
| if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| spin_lock(&lo->plh_inode->i_lock); |
| if (task->tk_status == 0 && lrp->res.lrs_present) |
| pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); |
| lo->plh_block_lgets--; |
| spin_unlock(&lo->plh_inode->i_lock); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static void nfs4_layoutreturn_release(void *calldata) |
| { |
| struct nfs4_layoutreturn *lrp = calldata; |
| |
| dprintk("--> %s\n", __func__); |
| pnfs_put_layout_hdr(lrp->args.layout); |
| kfree(calldata); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { |
| .rpc_call_prepare = nfs4_layoutreturn_prepare, |
| .rpc_call_done = nfs4_layoutreturn_done, |
| .rpc_release = nfs4_layoutreturn_release, |
| }; |
| |
| int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) |
| { |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], |
| .rpc_argp = &lrp->args, |
| .rpc_resp = &lrp->res, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = lrp->clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_layoutreturn_call_ops, |
| .callback_data = lrp, |
| }; |
| int status; |
| |
| dprintk("--> %s\n", __func__); |
| nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = task->tk_status; |
| dprintk("<-- %s status=%d\n", __func__, status); |
| rpc_put_task(task); |
| return status; |
| } |
| |
| /* |
| * Retrieve the list of Data Server devices from the MDS. |
| */ |
| static int _nfs4_getdevicelist(struct nfs_server *server, |
| const struct nfs_fh *fh, |
| struct pnfs_devicelist *devlist) |
| { |
| struct nfs4_getdevicelist_args args = { |
| .fh = fh, |
| .layoutclass = server->pnfs_curr_ld->id, |
| }; |
| struct nfs4_getdevicelist_res res = { |
| .devlist = devlist, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("--> %s\n", __func__); |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, |
| &res.seq_res, 0); |
| dprintk("<-- %s status=%d\n", __func__, status); |
| return status; |
| } |
| |
| int nfs4_proc_getdevicelist(struct nfs_server *server, |
| const struct nfs_fh *fh, |
| struct pnfs_devicelist *devlist) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_getdevicelist(server, fh, devlist), |
| &exception); |
| } while (exception.retry); |
| |
| dprintk("%s: err=%d, num_devs=%u\n", __func__, |
| err, devlist->num_devs); |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); |
| |
| static int |
| _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) |
| { |
| struct nfs4_getdeviceinfo_args args = { |
| .pdev = pdev, |
| }; |
| struct nfs4_getdeviceinfo_res res = { |
| .pdev = pdev, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("--> %s\n", __func__); |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| dprintk("<-- %s status=%d\n", __func__, status); |
| |
| return status; |
| } |
| |
| int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_getdeviceinfo(server, pdev), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); |
| |
| static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutcommit_data *data = calldata; |
| struct nfs_server *server = NFS_SERVER(data->args.inode); |
| |
| if (nfs4_setup_sequence(server, &data->args.seq_args, |
| &data->res.seq_res, task)) |
| return; |
| rpc_call_start(task); |
| } |
| |
| static void |
| nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutcommit_data *data = calldata; |
| struct nfs_server *server = NFS_SERVER(data->args.inode); |
| |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return; |
| |
| switch (task->tk_status) { /* Just ignore these failures */ |
| case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ |
| case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ |
| case -NFS4ERR_BADLAYOUT: /* no layout */ |
| case -NFS4ERR_GRACE: /* loca_recalim always false */ |
| task->tk_status = 0; |
| break; |
| case 0: |
| nfs_post_op_update_inode_force_wcc(data->args.inode, |
| data->res.fattr); |
| break; |
| default: |
| if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| } |
| |
| static void nfs4_layoutcommit_release(void *calldata) |
| { |
| struct nfs4_layoutcommit_data *data = calldata; |
| struct pnfs_layout_segment *lseg, *tmp; |
| unsigned long *bitlock = &NFS_I(data->args.inode)->flags; |
| |
| pnfs_cleanup_layoutcommit(data); |
| /* Matched by references in pnfs_set_layoutcommit */ |
| list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) { |
| list_del_init(&lseg->pls_lc_list); |
| if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, |
| &lseg->pls_flags)) |
| pnfs_put_lseg(lseg); |
| } |
| |
| clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); |
| smp_mb__after_clear_bit(); |
| wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
| |
| put_rpccred(data->cred); |
| kfree(data); |
| } |
| |
| static const struct rpc_call_ops nfs4_layoutcommit_ops = { |
| .rpc_call_prepare = nfs4_layoutcommit_prepare, |
| .rpc_call_done = nfs4_layoutcommit_done, |
| .rpc_release = nfs4_layoutcommit_release, |
| }; |
| |
| int |
| nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], |
| .rpc_argp = &data->args, |
| .rpc_resp = &data->res, |
| .rpc_cred = data->cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .task = &data->task, |
| .rpc_client = NFS_CLIENT(data->args.inode), |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_layoutcommit_ops, |
| .callback_data = data, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| struct rpc_task *task; |
| int status = 0; |
| |
| dprintk("NFS: %4d initiating layoutcommit call. sync %d " |
| "lbw: %llu inode %lu\n", |
| data->task.tk_pid, sync, |
| data->args.lastbytewritten, |
| data->args.inode->i_ino); |
| |
| nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| if (sync == false) |
| goto out; |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) |
| goto out; |
| status = task->tk_status; |
| out: |
| dprintk("%s: status %d\n", __func__, status); |
| rpc_put_task(task); |
| return status; |
| } |
| |
| static int |
| _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) |
| { |
| struct nfs41_secinfo_no_name_args args = { |
| .style = SECINFO_STYLE_CURRENT_FH, |
| }; |
| struct nfs4_secinfo_res res = { |
| .flavors = flavors, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int |
| nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); |
| switch (err) { |
| case 0: |
| case -NFS4ERR_WRONGSEC: |
| case -NFS4ERR_NOTSUPP: |
| goto out; |
| default: |
| err = nfs4_handle_exception(server, err, &exception); |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static int |
| nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int err; |
| struct page *page; |
| rpc_authflavor_t flavor; |
| struct nfs4_secinfo_flavors *flavors; |
| |
| page = alloc_page(GFP_KERNEL); |
| if (!page) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| flavors = page_address(page); |
| err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); |
| |
| /* |
| * Fall back on "guess and check" method if |
| * the server doesn't support SECINFO_NO_NAME |
| */ |
| if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) { |
| err = nfs4_find_root_sec(server, fhandle, info); |
| goto out_freepage; |
| } |
| if (err) |
| goto out_freepage; |
| |
| flavor = nfs_find_best_sec(flavors); |
| if (err == 0) |
| err = nfs4_lookup_root_sec(server, fhandle, info, flavor); |
| |
| out_freepage: |
| put_page(page); |
| if (err == -EACCES) |
| return -EPERM; |
| out: |
| return err; |
| } |
| |
| static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) |
| { |
| int status; |
| struct nfs41_test_stateid_args args = { |
| .stateid = stateid, |
| }; |
| struct nfs41_test_stateid_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| dprintk("NFS call test_stateid %p\n", stateid); |
| nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); |
| status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); |
| if (status != NFS_OK) { |
| dprintk("NFS reply test_stateid: failed, %d\n", status); |
| return status; |
| } |
| dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); |
| return -res.status; |
| } |
| |
| /** |
| * nfs41_test_stateid - perform a TEST_STATEID operation |
| * |
| * @server: server / transport on which to perform the operation |
| * @stateid: state ID to test |
| * |
| * Returns NFS_OK if the server recognizes that "stateid" is valid. |
| * Otherwise a negative NFS4ERR value is returned if the operation |
| * failed or the state ID is not currently valid. |
| */ |
| static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs41_test_stateid(server, stateid); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) |
| { |
| struct nfs41_free_stateid_args args = { |
| .stateid = stateid, |
| }; |
| struct nfs41_free_stateid_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("NFS call free_stateid %p\n", stateid); |
| nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); |
| status = nfs4_call_sync_sequence(server->client, server, &msg, |
| &args.seq_args, &res.seq_res, 1); |
| dprintk("NFS reply free_stateid: %d\n", status); |
| return status; |
| } |
| |
| /** |
| * nfs41_free_stateid - perform a FREE_STATEID operation |
| * |
| * @server: server / transport on which to perform the operation |
| * @stateid: state ID to release |
| * |
| * Returns NFS_OK if the server freed "stateid". Otherwise a |
| * negative NFS4ERR value is returned. |
| */ |
| static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_free_stateid(server, stateid); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static bool nfs41_match_stateid(const nfs4_stateid *s1, |
| const nfs4_stateid *s2) |
| { |
| if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) |
| return false; |
| |
| if (s1->seqid == s2->seqid) |
| return true; |
| if (s1->seqid == 0 || s2->seqid == 0) |
| return true; |
| |
| return false; |
| } |
| |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static bool nfs4_match_stateid(const nfs4_stateid *s1, |
| const nfs4_stateid *s2) |
| { |
| return nfs4_stateid_match(s1, s2); |
| } |
| |
| |
| static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| .recover_open = nfs4_open_reclaim, |
| .recover_lock = nfs4_lock_reclaim, |
| .establish_clid = nfs4_init_clientid, |
| .get_clid_cred = nfs4_get_setclientid_cred, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| .recover_open = nfs4_open_reclaim, |
| .recover_lock = nfs4_lock_reclaim, |
| .establish_clid = nfs41_init_clientid, |
| .get_clid_cred = nfs4_get_exchange_id_cred, |
| .reclaim_complete = nfs41_proc_reclaim_complete, |
| }; |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| .recover_open = nfs4_open_expired, |
| .recover_lock = nfs4_lock_expired, |
| .establish_clid = nfs4_init_clientid, |
| .get_clid_cred = nfs4_get_setclientid_cred, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| .recover_open = nfs41_open_expired, |
| .recover_lock = nfs41_lock_expired, |
| .establish_clid = nfs41_init_clientid, |
| .get_clid_cred = nfs4_get_exchange_id_cred, |
| }; |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
| .sched_state_renewal = nfs4_proc_async_renew, |
| .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
| .renew_lease = nfs4_proc_renew, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { |
| .sched_state_renewal = nfs41_proc_async_sequence, |
| .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
| .renew_lease = nfs4_proc_sequence, |
| }; |
| #endif |
| |
| static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
| .minor_version = 0, |
| .call_sync = _nfs4_call_sync, |
| .match_stateid = nfs4_match_stateid, |
| .find_root_sec = nfs4_find_root_sec, |
| .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
| .nograce_recovery_ops = &nfs40_nograce_recovery_ops, |
| .state_renewal_ops = &nfs40_state_renewal_ops, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { |
| .minor_version = 1, |
| .call_sync = _nfs4_call_sync_session, |
| .match_stateid = nfs41_match_stateid, |
| .find_root_sec = nfs41_find_root_sec, |
| .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
| .nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
| .state_renewal_ops = &nfs41_state_renewal_ops, |
| }; |
| #endif |
| |
| const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
| [0] = &nfs_v4_0_minor_ops, |
| #if defined(CONFIG_NFS_V4_1) |
| [1] = &nfs_v4_1_minor_ops, |
| #endif |
| }; |
| |
| const struct inode_operations nfs4_dir_inode_operations = { |
| .create = nfs_create, |
| .lookup = nfs_lookup, |
| .atomic_open = nfs_atomic_open, |
| .link = nfs_link, |
| .unlink = nfs_unlink, |
| .symlink = nfs_symlink, |
| .mkdir = nfs_mkdir, |
| .rmdir = nfs_rmdir, |
| .mknod = nfs_mknod, |
| .rename = nfs_rename, |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| .getxattr = generic_getxattr, |
| .setxattr = generic_setxattr, |
| .listxattr = generic_listxattr, |
| .removexattr = generic_removexattr, |
| }; |
| |
| static const struct inode_operations nfs4_file_inode_operations = { |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| .getxattr = generic_getxattr, |
| .setxattr = generic_setxattr, |
| .listxattr = generic_listxattr, |
| .removexattr = generic_removexattr, |
| }; |
| |
| const struct nfs_rpc_ops nfs_v4_clientops = { |
| .version = 4, /* protocol version */ |
| .dentry_ops = &nfs4_dentry_operations, |
| .dir_inode_ops = &nfs4_dir_inode_operations, |
| .file_inode_ops = &nfs4_file_inode_operations, |
| .file_ops = &nfs4_file_operations, |
| .getroot = nfs4_proc_get_root, |
| .submount = nfs4_submount, |
| .try_mount = nfs4_try_mount, |
| .getattr = nfs4_proc_getattr, |
| .setattr = nfs4_proc_setattr, |
| .lookup = nfs4_proc_lookup, |
| .access = nfs4_proc_access, |
| .readlink = nfs4_proc_readlink, |
| .create = nfs4_proc_create, |
| .remove = nfs4_proc_remove, |
| .unlink_setup = nfs4_proc_unlink_setup, |
| .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, |
| .unlink_done = nfs4_proc_unlink_done, |
| .rename = nfs4_proc_rename, |
| .rename_setup = nfs4_proc_rename_setup, |
| .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, |
| .rename_done = nfs4_proc_rename_done, |
| .link = nfs4_proc_link, |
| .symlink = nfs4_proc_symlink, |
| .mkdir = nfs4_proc_mkdir, |
| .rmdir = nfs4_proc_remove, |
| .readdir = nfs4_proc_readdir, |
| .mknod = nfs4_proc_mknod, |
| .statfs = nfs4_proc_statfs, |
| .fsinfo = nfs4_proc_fsinfo, |
| .pathconf = nfs4_proc_pathconf, |
| .set_capabilities = nfs4_server_capabilities, |
| .decode_dirent = nfs4_decode_dirent, |
| .read_setup = nfs4_proc_read_setup, |
| .read_pageio_init = pnfs_pageio_init_read, |
| .read_rpc_prepare = nfs4_proc_read_rpc_prepare, |
| .read_done = nfs4_read_done, |
| .write_setup = nfs4_proc_write_setup, |
| .write_pageio_init = pnfs_pageio_init_write, |
| .write_rpc_prepare = nfs4_proc_write_rpc_prepare, |
| .write_done = nfs4_write_done, |
| .commit_setup = nfs4_proc_commit_setup, |
| .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, |
| .commit_done = nfs4_commit_done, |
| .lock = nfs4_proc_lock, |
| .clear_acl_cache = nfs4_zap_acl_attr, |
| .close_context = nfs4_close_context, |
| .open_context = nfs4_atomic_open, |
| .have_delegation = nfs4_have_delegation, |
| .return_delegation = nfs4_inode_return_delegation, |
| .alloc_client = nfs4_alloc_client, |
| .init_client = nfs4_init_client, |
| .free_client = nfs4_free_client, |
| .create_server = nfs4_create_server, |
| .clone_server = nfs_clone_server, |
| }; |
| |
| static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { |
| .prefix = XATTR_NAME_NFSV4_ACL, |
| .list = nfs4_xattr_list_nfs4_acl, |
| .get = nfs4_xattr_get_nfs4_acl, |
| .set = nfs4_xattr_set_nfs4_acl, |
| }; |
| |
| const struct xattr_handler *nfs4_xattr_handlers[] = { |
| &nfs4_xattr_nfs4_acl_handler, |
| NULL |
| }; |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |
