| /* |
| * fs/cifs/connect.c |
| * |
| * Copyright (C) International Business Machines Corp., 2002,2011 |
| * Author(s): Steve French (sfrench@us.ibm.com) |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <linux/fs.h> |
| #include <linux/net.h> |
| #include <linux/string.h> |
| #include <linux/list.h> |
| #include <linux/wait.h> |
| #include <linux/slab.h> |
| #include <linux/pagemap.h> |
| #include <linux/ctype.h> |
| #include <linux/utsname.h> |
| #include <linux/mempool.h> |
| #include <linux/delay.h> |
| #include <linux/completion.h> |
| #include <linux/kthread.h> |
| #include <linux/pagevec.h> |
| #include <linux/freezer.h> |
| #include <linux/namei.h> |
| #include <asm/uaccess.h> |
| #include <asm/processor.h> |
| #include <linux/inet.h> |
| #include <linux/module.h> |
| #include <keys/user-type.h> |
| #include <net/ipv6.h> |
| #include <linux/parser.h> |
| |
| #include "cifspdu.h" |
| #include "cifsglob.h" |
| #include "cifsproto.h" |
| #include "cifs_unicode.h" |
| #include "cifs_debug.h" |
| #include "cifs_fs_sb.h" |
| #include "ntlmssp.h" |
| #include "nterr.h" |
| #include "rfc1002pdu.h" |
| #include "fscache.h" |
| |
| #define CIFS_PORT 445 |
| #define RFC1001_PORT 139 |
| |
| extern mempool_t *cifs_req_poolp; |
| |
| /* FIXME: should these be tunable? */ |
| #define TLINK_ERROR_EXPIRE (1 * HZ) |
| #define TLINK_IDLE_EXPIRE (600 * HZ) |
| |
| enum { |
| |
| /* Mount options that take no arguments */ |
| Opt_user_xattr, Opt_nouser_xattr, |
| Opt_forceuid, Opt_noforceuid, |
| Opt_forcegid, Opt_noforcegid, |
| Opt_noblocksend, Opt_noautotune, |
| Opt_hard, Opt_soft, Opt_perm, Opt_noperm, |
| Opt_mapposix, Opt_nomapposix, |
| Opt_mapchars, Opt_nomapchars, Opt_sfu, |
| Opt_nosfu, Opt_nodfs, Opt_posixpaths, |
| Opt_noposixpaths, Opt_nounix, |
| Opt_nocase, |
| Opt_brl, Opt_nobrl, |
| Opt_forcemandatorylock, Opt_setuids, |
| Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
| Opt_nohard, Opt_nosoft, |
| Opt_nointr, Opt_intr, |
| Opt_nostrictsync, Opt_strictsync, |
| Opt_serverino, Opt_noserverino, |
| Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, |
| Opt_acl, Opt_noacl, Opt_locallease, |
| Opt_sign, Opt_seal, Opt_noac, |
| Opt_fsc, Opt_mfsymlinks, |
| Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
| Opt_persistent, Opt_nopersistent, |
| Opt_resilient, Opt_noresilient, |
| |
| /* Mount options which take numeric value */ |
| Opt_backupuid, Opt_backupgid, Opt_uid, |
| Opt_cruid, Opt_gid, Opt_file_mode, |
| Opt_dirmode, Opt_port, |
| Opt_rsize, Opt_wsize, Opt_actimeo, |
| |
| /* Mount options which take string value */ |
| Opt_user, Opt_pass, Opt_ip, |
| Opt_domain, Opt_srcaddr, Opt_iocharset, |
| Opt_netbiosname, Opt_servern, |
| Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
| |
| /* Mount options to be ignored */ |
| Opt_ignore, |
| |
| /* Options which could be blank */ |
| Opt_blank_pass, |
| Opt_blank_user, |
| Opt_blank_ip, |
| |
| Opt_err |
| }; |
| |
| static const match_table_t cifs_mount_option_tokens = { |
| |
| { Opt_user_xattr, "user_xattr" }, |
| { Opt_nouser_xattr, "nouser_xattr" }, |
| { Opt_forceuid, "forceuid" }, |
| { Opt_noforceuid, "noforceuid" }, |
| { Opt_forcegid, "forcegid" }, |
| { Opt_noforcegid, "noforcegid" }, |
| { Opt_noblocksend, "noblocksend" }, |
| { Opt_noautotune, "noautotune" }, |
| { Opt_hard, "hard" }, |
| { Opt_soft, "soft" }, |
| { Opt_perm, "perm" }, |
| { Opt_noperm, "noperm" }, |
| { Opt_mapchars, "mapchars" }, /* SFU style */ |
| { Opt_nomapchars, "nomapchars" }, |
| { Opt_mapposix, "mapposix" }, /* SFM style */ |
| { Opt_nomapposix, "nomapposix" }, |
| { Opt_sfu, "sfu" }, |
| { Opt_nosfu, "nosfu" }, |
| { Opt_nodfs, "nodfs" }, |
| { Opt_posixpaths, "posixpaths" }, |
| { Opt_noposixpaths, "noposixpaths" }, |
| { Opt_nounix, "nounix" }, |
| { Opt_nounix, "nolinux" }, |
| { Opt_nocase, "nocase" }, |
| { Opt_nocase, "ignorecase" }, |
| { Opt_brl, "brl" }, |
| { Opt_nobrl, "nobrl" }, |
| { Opt_nobrl, "nolock" }, |
| { Opt_forcemandatorylock, "forcemandatorylock" }, |
| { Opt_forcemandatorylock, "forcemand" }, |
| { Opt_setuids, "setuids" }, |
| { Opt_nosetuids, "nosetuids" }, |
| { Opt_dynperm, "dynperm" }, |
| { Opt_nodynperm, "nodynperm" }, |
| { Opt_nohard, "nohard" }, |
| { Opt_nosoft, "nosoft" }, |
| { Opt_nointr, "nointr" }, |
| { Opt_intr, "intr" }, |
| { Opt_nostrictsync, "nostrictsync" }, |
| { Opt_strictsync, "strictsync" }, |
| { Opt_serverino, "serverino" }, |
| { Opt_noserverino, "noserverino" }, |
| { Opt_rwpidforward, "rwpidforward" }, |
| { Opt_cifsacl, "cifsacl" }, |
| { Opt_nocifsacl, "nocifsacl" }, |
| { Opt_acl, "acl" }, |
| { Opt_noacl, "noacl" }, |
| { Opt_locallease, "locallease" }, |
| { Opt_sign, "sign" }, |
| { Opt_seal, "seal" }, |
| { Opt_noac, "noac" }, |
| { Opt_fsc, "fsc" }, |
| { Opt_mfsymlinks, "mfsymlinks" }, |
| { Opt_multiuser, "multiuser" }, |
| { Opt_sloppy, "sloppy" }, |
| { Opt_nosharesock, "nosharesock" }, |
| { Opt_persistent, "persistenthandles"}, |
| { Opt_nopersistent, "nopersistenthandles"}, |
| { Opt_resilient, "resilienthandles"}, |
| { Opt_noresilient, "noresilienthandles"}, |
| |
| { Opt_backupuid, "backupuid=%s" }, |
| { Opt_backupgid, "backupgid=%s" }, |
| { Opt_uid, "uid=%s" }, |
| { Opt_cruid, "cruid=%s" }, |
| { Opt_gid, "gid=%s" }, |
| { Opt_file_mode, "file_mode=%s" }, |
| { Opt_dirmode, "dirmode=%s" }, |
| { Opt_dirmode, "dir_mode=%s" }, |
| { Opt_port, "port=%s" }, |
| { Opt_rsize, "rsize=%s" }, |
| { Opt_wsize, "wsize=%s" }, |
| { Opt_actimeo, "actimeo=%s" }, |
| |
| { Opt_blank_user, "user=" }, |
| { Opt_blank_user, "username=" }, |
| { Opt_user, "user=%s" }, |
| { Opt_user, "username=%s" }, |
| { Opt_blank_pass, "pass=" }, |
| { Opt_blank_pass, "password=" }, |
| { Opt_pass, "pass=%s" }, |
| { Opt_pass, "password=%s" }, |
| { Opt_blank_ip, "ip=" }, |
| { Opt_blank_ip, "addr=" }, |
| { Opt_ip, "ip=%s" }, |
| { Opt_ip, "addr=%s" }, |
| { Opt_ignore, "unc=%s" }, |
| { Opt_ignore, "target=%s" }, |
| { Opt_ignore, "path=%s" }, |
| { Opt_domain, "dom=%s" }, |
| { Opt_domain, "domain=%s" }, |
| { Opt_domain, "workgroup=%s" }, |
| { Opt_srcaddr, "srcaddr=%s" }, |
| { Opt_ignore, "prefixpath=%s" }, |
| { Opt_iocharset, "iocharset=%s" }, |
| { Opt_netbiosname, "netbiosname=%s" }, |
| { Opt_servern, "servern=%s" }, |
| { Opt_ver, "ver=%s" }, |
| { Opt_vers, "vers=%s" }, |
| { Opt_sec, "sec=%s" }, |
| { Opt_cache, "cache=%s" }, |
| |
| { Opt_ignore, "cred" }, |
| { Opt_ignore, "credentials" }, |
| { Opt_ignore, "cred=%s" }, |
| { Opt_ignore, "credentials=%s" }, |
| { Opt_ignore, "guest" }, |
| { Opt_ignore, "rw" }, |
| { Opt_ignore, "ro" }, |
| { Opt_ignore, "suid" }, |
| { Opt_ignore, "nosuid" }, |
| { Opt_ignore, "exec" }, |
| { Opt_ignore, "noexec" }, |
| { Opt_ignore, "nodev" }, |
| { Opt_ignore, "noauto" }, |
| { Opt_ignore, "dev" }, |
| { Opt_ignore, "mand" }, |
| { Opt_ignore, "nomand" }, |
| { Opt_ignore, "_netdev" }, |
| |
| { Opt_err, NULL } |
| }; |
| |
| enum { |
| Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, |
| Opt_sec_ntlmsspi, Opt_sec_ntlmssp, |
| Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
| Opt_sec_ntlmv2i, Opt_sec_lanman, |
| Opt_sec_none, |
| |
| Opt_sec_err |
| }; |
| |
| static const match_table_t cifs_secflavor_tokens = { |
| { Opt_sec_krb5, "krb5" }, |
| { Opt_sec_krb5i, "krb5i" }, |
| { Opt_sec_krb5p, "krb5p" }, |
| { Opt_sec_ntlmsspi, "ntlmsspi" }, |
| { Opt_sec_ntlmssp, "ntlmssp" }, |
| { Opt_ntlm, "ntlm" }, |
| { Opt_sec_ntlmi, "ntlmi" }, |
| { Opt_sec_ntlmv2, "nontlm" }, |
| { Opt_sec_ntlmv2, "ntlmv2" }, |
| { Opt_sec_ntlmv2i, "ntlmv2i" }, |
| { Opt_sec_lanman, "lanman" }, |
| { Opt_sec_none, "none" }, |
| |
| { Opt_sec_err, NULL } |
| }; |
| |
| /* cache flavors */ |
| enum { |
| Opt_cache_loose, |
| Opt_cache_strict, |
| Opt_cache_none, |
| Opt_cache_err |
| }; |
| |
| static const match_table_t cifs_cacheflavor_tokens = { |
| { Opt_cache_loose, "loose" }, |
| { Opt_cache_strict, "strict" }, |
| { Opt_cache_none, "none" }, |
| { Opt_cache_err, NULL } |
| }; |
| |
| static const match_table_t cifs_smb_version_tokens = { |
| { Smb_1, SMB1_VERSION_STRING }, |
| { Smb_20, SMB20_VERSION_STRING}, |
| { Smb_21, SMB21_VERSION_STRING }, |
| { Smb_30, SMB30_VERSION_STRING }, |
| { Smb_302, SMB302_VERSION_STRING }, |
| #ifdef CONFIG_CIFS_SMB311 |
| { Smb_311, SMB311_VERSION_STRING }, |
| { Smb_311, ALT_SMB311_VERSION_STRING }, |
| #endif /* SMB311 */ |
| { Smb_version_err, NULL } |
| }; |
| |
| static int ip_connect(struct TCP_Server_Info *server); |
| static int generic_ip_connect(struct TCP_Server_Info *server); |
| static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
| static void cifs_prune_tlinks(struct work_struct *work); |
| static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| const char *devname); |
| |
| /* |
| * cifs tcp session reconnection |
| * |
| * mark tcp session as reconnecting so temporarily locked |
| * mark all smb sessions as reconnecting for tcp session |
| * reconnect tcp session |
| * wake up waiters on reconnection? - (not needed currently) |
| */ |
| int |
| cifs_reconnect(struct TCP_Server_Info *server) |
| { |
| int rc = 0; |
| struct list_head *tmp, *tmp2; |
| struct cifs_ses *ses; |
| struct cifs_tcon *tcon; |
| struct mid_q_entry *mid_entry; |
| struct list_head retry_list; |
| |
| spin_lock(&GlobalMid_Lock); |
| if (server->tcpStatus == CifsExiting) { |
| /* the demux thread will exit normally |
| next time through the loop */ |
| spin_unlock(&GlobalMid_Lock); |
| return rc; |
| } else |
| server->tcpStatus = CifsNeedReconnect; |
| spin_unlock(&GlobalMid_Lock); |
| server->maxBuf = 0; |
| #ifdef CONFIG_CIFS_SMB2 |
| server->max_read = 0; |
| #endif |
| |
| cifs_dbg(FYI, "Reconnecting tcp session\n"); |
| |
| /* before reconnecting the tcp session, mark the smb session (uid) |
| and the tid bad so they are not used until reconnected */ |
| cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
| __func__); |
| spin_lock(&cifs_tcp_ses_lock); |
| list_for_each(tmp, &server->smb_ses_list) { |
| ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
| ses->need_reconnect = true; |
| ses->ipc_tid = 0; |
| list_for_each(tmp2, &ses->tcon_list) { |
| tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
| tcon->need_reconnect = true; |
| } |
| } |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| /* do not want to be sending data on a socket we are freeing */ |
| cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
| mutex_lock(&server->srv_mutex); |
| if (server->ssocket) { |
| cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
| server->ssocket->state, server->ssocket->flags); |
| kernel_sock_shutdown(server->ssocket, SHUT_WR); |
| cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
| server->ssocket->state, server->ssocket->flags); |
| sock_release(server->ssocket); |
| server->ssocket = NULL; |
| } |
| server->sequence_number = 0; |
| server->session_estab = false; |
| kfree(server->session_key.response); |
| server->session_key.response = NULL; |
| server->session_key.len = 0; |
| server->lstrp = jiffies; |
| mutex_unlock(&server->srv_mutex); |
| |
| /* mark submitted MIDs for retry and issue callback */ |
| INIT_LIST_HEAD(&retry_list); |
| cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
| spin_lock(&GlobalMid_Lock); |
| list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
| mid_entry->mid_state = MID_RETRY_NEEDED; |
| list_move(&mid_entry->qhead, &retry_list); |
| } |
| spin_unlock(&GlobalMid_Lock); |
| |
| cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
| list_for_each_safe(tmp, tmp2, &retry_list) { |
| mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| list_del_init(&mid_entry->qhead); |
| mid_entry->callback(mid_entry); |
| } |
| |
| do { |
| try_to_freeze(); |
| |
| /* we should try only the port we connected to before */ |
| mutex_lock(&server->srv_mutex); |
| rc = generic_ip_connect(server); |
| if (rc) { |
| cifs_dbg(FYI, "reconnect error %d\n", rc); |
| mutex_unlock(&server->srv_mutex); |
| msleep(3000); |
| } else { |
| atomic_inc(&tcpSesReconnectCount); |
| spin_lock(&GlobalMid_Lock); |
| if (server->tcpStatus != CifsExiting) |
| server->tcpStatus = CifsNeedNegotiate; |
| spin_unlock(&GlobalMid_Lock); |
| mutex_unlock(&server->srv_mutex); |
| } |
| } while (server->tcpStatus == CifsNeedReconnect); |
| |
| return rc; |
| } |
| |
| static void |
| cifs_echo_request(struct work_struct *work) |
| { |
| int rc; |
| struct TCP_Server_Info *server = container_of(work, |
| struct TCP_Server_Info, echo.work); |
| |
| /* |
| * We cannot send an echo if it is disabled or until the |
| * NEGOTIATE_PROTOCOL request is done, which is indicated by |
| * server->ops->need_neg() == true. Also, no need to ping if |
| * we got a response recently. |
| */ |
| if (!server->ops->need_neg || server->ops->need_neg(server) || |
| (server->ops->can_echo && !server->ops->can_echo(server)) || |
| time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
| goto requeue_echo; |
| |
| rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
| if (rc) |
| cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
| server->hostname); |
| |
| requeue_echo: |
| queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
| } |
| |
| static bool |
| allocate_buffers(struct TCP_Server_Info *server) |
| { |
| if (!server->bigbuf) { |
| server->bigbuf = (char *)cifs_buf_get(); |
| if (!server->bigbuf) { |
| cifs_dbg(VFS, "No memory for large SMB response\n"); |
| msleep(3000); |
| /* retry will check if exiting */ |
| return false; |
| } |
| } else if (server->large_buf) { |
| /* we are reusing a dirty large buf, clear its start */ |
| memset(server->bigbuf, 0, HEADER_SIZE(server)); |
| } |
| |
| if (!server->smallbuf) { |
| server->smallbuf = (char *)cifs_small_buf_get(); |
| if (!server->smallbuf) { |
| cifs_dbg(VFS, "No memory for SMB response\n"); |
| msleep(1000); |
| /* retry will check if exiting */ |
| return false; |
| } |
| /* beginning of smb buffer is cleared in our buf_get */ |
| } else { |
| /* if existing small buf clear beginning */ |
| memset(server->smallbuf, 0, HEADER_SIZE(server)); |
| } |
| |
| return true; |
| } |
| |
| static bool |
| server_unresponsive(struct TCP_Server_Info *server) |
| { |
| /* |
| * We need to wait 2 echo intervals to make sure we handle such |
| * situations right: |
| * 1s client sends a normal SMB request |
| * 2s client gets a response |
| * 30s echo workqueue job pops, and decides we got a response recently |
| * and don't need to send another |
| * ... |
| * 65s kernel_recvmsg times out, and we see that we haven't gotten |
| * a response in >60s. |
| */ |
| if (server->tcpStatus == CifsGood && |
| time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { |
| cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n", |
| server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ); |
| cifs_reconnect(server); |
| wake_up(&server->response_q); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* |
| * kvec_array_init - clone a kvec array, and advance into it |
| * @new: pointer to memory for cloned array |
| * @iov: pointer to original array |
| * @nr_segs: number of members in original array |
| * @bytes: number of bytes to advance into the cloned array |
| * |
| * This function will copy the array provided in iov to a section of memory |
| * and advance the specified number of bytes into the new array. It returns |
| * the number of segments in the new array. "new" must be at least as big as |
| * the original iov array. |
| */ |
| static unsigned int |
| kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, |
| size_t bytes) |
| { |
| size_t base = 0; |
| |
| while (bytes || !iov->iov_len) { |
| int copy = min(bytes, iov->iov_len); |
| |
| bytes -= copy; |
| base += copy; |
| if (iov->iov_len == base) { |
| iov++; |
| nr_segs--; |
| base = 0; |
| } |
| } |
| memcpy(new, iov, sizeof(*iov) * nr_segs); |
| new->iov_base += base; |
| new->iov_len -= base; |
| return nr_segs; |
| } |
| |
| static struct kvec * |
| get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) |
| { |
| struct kvec *new_iov; |
| |
| if (server->iov && nr_segs <= server->nr_iov) |
| return server->iov; |
| |
| /* not big enough -- allocate a new one and release the old */ |
| new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); |
| if (new_iov) { |
| kfree(server->iov); |
| server->iov = new_iov; |
| server->nr_iov = nr_segs; |
| } |
| return new_iov; |
| } |
| |
| int |
| cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, |
| unsigned int nr_segs, unsigned int to_read) |
| { |
| int length = 0; |
| int total_read; |
| unsigned int segs; |
| struct msghdr smb_msg; |
| struct kvec *iov; |
| |
| iov = get_server_iovec(server, nr_segs); |
| if (!iov) |
| return -ENOMEM; |
| |
| smb_msg.msg_control = NULL; |
| smb_msg.msg_controllen = 0; |
| |
| for (total_read = 0; to_read; total_read += length, to_read -= length) { |
| try_to_freeze(); |
| |
| if (server_unresponsive(server)) { |
| total_read = -ECONNABORTED; |
| break; |
| } |
| |
| segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
| |
| length = kernel_recvmsg(server->ssocket, &smb_msg, |
| iov, segs, to_read, 0); |
| |
| if (server->tcpStatus == CifsExiting) { |
| total_read = -ESHUTDOWN; |
| break; |
| } else if (server->tcpStatus == CifsNeedReconnect) { |
| cifs_reconnect(server); |
| total_read = -ECONNABORTED; |
| break; |
| } else if (length == -ERESTARTSYS || |
| length == -EAGAIN || |
| length == -EINTR) { |
| /* |
| * Minimum sleep to prevent looping, allowing socket |
| * to clear and app threads to set tcpStatus |
| * CifsNeedReconnect if server hung. |
| */ |
| usleep_range(1000, 2000); |
| length = 0; |
| continue; |
| } else if (length <= 0) { |
| cifs_dbg(FYI, "Received no data or error: expecting %d\n" |
| "got %d", to_read, length); |
| cifs_reconnect(server); |
| total_read = -ECONNABORTED; |
| break; |
| } |
| } |
| return total_read; |
| } |
| |
| int |
| cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, |
| unsigned int to_read) |
| { |
| struct kvec iov; |
| |
| iov.iov_base = buf; |
| iov.iov_len = to_read; |
| |
| return cifs_readv_from_socket(server, &iov, 1, to_read); |
| } |
| |
| static bool |
| is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
| { |
| /* |
| * The first byte big endian of the length field, |
| * is actually not part of the length but the type |
| * with the most common, zero, as regular data. |
| */ |
| switch (type) { |
| case RFC1002_SESSION_MESSAGE: |
| /* Regular SMB response */ |
| return true; |
| case RFC1002_SESSION_KEEP_ALIVE: |
| cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
| break; |
| case RFC1002_POSITIVE_SESSION_RESPONSE: |
| cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
| break; |
| case RFC1002_NEGATIVE_SESSION_RESPONSE: |
| /* |
| * We get this from Windows 98 instead of an error on |
| * SMB negprot response. |
| */ |
| cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
| /* give server a second to clean up */ |
| msleep(1000); |
| /* |
| * Always try 445 first on reconnect since we get NACK |
| * on some if we ever connected to port 139 (the NACK |
| * is since we do not begin with RFC1001 session |
| * initialize frame). |
| */ |
| cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
| cifs_reconnect(server); |
| wake_up(&server->response_q); |
| break; |
| default: |
| cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
| cifs_reconnect(server); |
| } |
| |
| return false; |
| } |
| |
| void |
| dequeue_mid(struct mid_q_entry *mid, bool malformed) |
| { |
| #ifdef CONFIG_CIFS_STATS2 |
| mid->when_received = jiffies; |
| #endif |
| spin_lock(&GlobalMid_Lock); |
| if (!malformed) |
| mid->mid_state = MID_RESPONSE_RECEIVED; |
| else |
| mid->mid_state = MID_RESPONSE_MALFORMED; |
| list_del_init(&mid->qhead); |
| spin_unlock(&GlobalMid_Lock); |
| } |
| |
| static void |
| handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, |
| char *buf, int malformed) |
| { |
| if (server->ops->check_trans2 && |
| server->ops->check_trans2(mid, server, buf, malformed)) |
| return; |
| mid->resp_buf = buf; |
| mid->large_buf = server->large_buf; |
| /* Was previous buf put in mpx struct for multi-rsp? */ |
| if (!mid->multiRsp) { |
| /* smb buffer will be freed by user thread */ |
| if (server->large_buf) |
| server->bigbuf = NULL; |
| else |
| server->smallbuf = NULL; |
| } |
| dequeue_mid(mid, malformed); |
| } |
| |
| static void clean_demultiplex_info(struct TCP_Server_Info *server) |
| { |
| int length; |
| |
| /* take it off the list, if it's not already */ |
| spin_lock(&cifs_tcp_ses_lock); |
| list_del_init(&server->tcp_ses_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| spin_lock(&GlobalMid_Lock); |
| server->tcpStatus = CifsExiting; |
| spin_unlock(&GlobalMid_Lock); |
| wake_up_all(&server->response_q); |
| |
| /* check if we have blocked requests that need to free */ |
| spin_lock(&server->req_lock); |
| if (server->credits <= 0) |
| server->credits = 1; |
| spin_unlock(&server->req_lock); |
| /* |
| * Although there should not be any requests blocked on this queue it |
| * can not hurt to be paranoid and try to wake up requests that may |
| * haven been blocked when more than 50 at time were on the wire to the |
| * same server - they now will see the session is in exit state and get |
| * out of SendReceive. |
| */ |
| wake_up_all(&server->request_q); |
| /* give those requests time to exit */ |
| msleep(125); |
| |
| if (server->ssocket) { |
| sock_release(server->ssocket); |
| server->ssocket = NULL; |
| } |
| |
| if (!list_empty(&server->pending_mid_q)) { |
| struct list_head dispose_list; |
| struct mid_q_entry *mid_entry; |
| struct list_head *tmp, *tmp2; |
| |
| INIT_LIST_HEAD(&dispose_list); |
| spin_lock(&GlobalMid_Lock); |
| list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
| mid_entry->mid_state = MID_SHUTDOWN; |
| list_move(&mid_entry->qhead, &dispose_list); |
| } |
| spin_unlock(&GlobalMid_Lock); |
| |
| /* now walk dispose list and issue callbacks */ |
| list_for_each_safe(tmp, tmp2, &dispose_list) { |
| mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
| list_del_init(&mid_entry->qhead); |
| mid_entry->callback(mid_entry); |
| } |
| /* 1/8th of sec is more than enough time for them to exit */ |
| msleep(125); |
| } |
| |
| if (!list_empty(&server->pending_mid_q)) { |
| /* |
| * mpx threads have not exited yet give them at least the smb |
| * send timeout time for long ops. |
| * |
| * Due to delays on oplock break requests, we need to wait at |
| * least 45 seconds before giving up on a request getting a |
| * response and going ahead and killing cifsd. |
| */ |
| cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
| msleep(46000); |
| /* |
| * If threads still have not exited they are probably never |
| * coming home not much else we can do but free the memory. |
| */ |
| } |
| |
| kfree(server->hostname); |
| kfree(server->iov); |
| kfree(server); |
| |
| length = atomic_dec_return(&tcpSesAllocCount); |
| if (length > 0) |
| mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
| } |
| |
| static int |
| standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) |
| { |
| int length; |
| char *buf = server->smallbuf; |
| unsigned int pdu_length = get_rfc1002_length(buf); |
| |
| /* make sure this will fit in a large buffer */ |
| if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
| cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
| cifs_reconnect(server); |
| wake_up(&server->response_q); |
| return -ECONNABORTED; |
| } |
| |
| /* switch to large buffer if too big for a small one */ |
| if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
| server->large_buf = true; |
| memcpy(server->bigbuf, buf, server->total_read); |
| buf = server->bigbuf; |
| } |
| |
| /* now read the rest */ |
| length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
| pdu_length - HEADER_SIZE(server) + 1 + 4); |
| if (length < 0) |
| return length; |
| server->total_read += length; |
| |
| dump_smb(buf, server->total_read); |
| |
| /* |
| * We know that we received enough to get to the MID as we |
| * checked the pdu_length earlier. Now check to see |
| * if the rest of the header is OK. We borrow the length |
| * var for the rest of the loop to avoid a new stack var. |
| * |
| * 48 bytes is enough to display the header and a little bit |
| * into the payload for debugging purposes. |
| */ |
| length = server->ops->check_message(buf, server->total_read); |
| if (length != 0) |
| cifs_dump_mem("Bad SMB: ", buf, |
| min_t(unsigned int, server->total_read, 48)); |
| |
| if (server->ops->is_status_pending && |
| server->ops->is_status_pending(buf, server, length)) |
| return -1; |
| |
| if (!mid) |
| return length; |
| |
| handle_mid(mid, server, buf, length); |
| return 0; |
| } |
| |
| static int |
| cifs_demultiplex_thread(void *p) |
| { |
| int length; |
| struct TCP_Server_Info *server = p; |
| unsigned int pdu_length; |
| char *buf = NULL; |
| struct task_struct *task_to_wake = NULL; |
| struct mid_q_entry *mid_entry; |
| |
| current->flags |= PF_MEMALLOC; |
| cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
| |
| length = atomic_inc_return(&tcpSesAllocCount); |
| if (length > 1) |
| mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
| |
| set_freezable(); |
| while (server->tcpStatus != CifsExiting) { |
| if (try_to_freeze()) |
| continue; |
| |
| if (!allocate_buffers(server)) |
| continue; |
| |
| server->large_buf = false; |
| buf = server->smallbuf; |
| pdu_length = 4; /* enough to get RFC1001 header */ |
| |
| length = cifs_read_from_socket(server, buf, pdu_length); |
| if (length < 0) |
| continue; |
| server->total_read = length; |
| |
| /* |
| * The right amount was read from socket - 4 bytes, |
| * so we can now interpret the length field. |
| */ |
| pdu_length = get_rfc1002_length(buf); |
| |
| cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
| if (!is_smb_response(server, buf[0])) |
| continue; |
| |
| /* make sure we have enough to get to the MID */ |
| if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
| cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
| pdu_length); |
| cifs_reconnect(server); |
| wake_up(&server->response_q); |
| continue; |
| } |
| |
| /* read down to the MID */ |
| length = cifs_read_from_socket(server, buf + 4, |
| HEADER_SIZE(server) - 1 - 4); |
| if (length < 0) |
| continue; |
| server->total_read += length; |
| |
| mid_entry = server->ops->find_mid(server, buf); |
| |
| if (!mid_entry || !mid_entry->receive) |
| length = standard_receive3(server, mid_entry); |
| else |
| length = mid_entry->receive(server, mid_entry); |
| |
| if (length < 0) |
| continue; |
| |
| if (server->large_buf) |
| buf = server->bigbuf; |
| |
| server->lstrp = jiffies; |
| if (mid_entry != NULL) { |
| if (!mid_entry->multiRsp || mid_entry->multiEnd) |
| mid_entry->callback(mid_entry); |
| } else if (!server->ops->is_oplock_break || |
| !server->ops->is_oplock_break(buf, server)) { |
| cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
| atomic_read(&midCount)); |
| cifs_dump_mem("Received Data is: ", buf, |
| HEADER_SIZE(server)); |
| #ifdef CONFIG_CIFS_DEBUG2 |
| if (server->ops->dump_detail) |
| server->ops->dump_detail(buf); |
| cifs_dump_mids(server); |
| #endif /* CIFS_DEBUG2 */ |
| |
| } |
| } /* end while !EXITING */ |
| |
| /* buffer usually freed in free_mid - need to free it here on exit */ |
| cifs_buf_release(server->bigbuf); |
| if (server->smallbuf) /* no sense logging a debug message if NULL */ |
| cifs_small_buf_release(server->smallbuf); |
| |
| task_to_wake = xchg(&server->tsk, NULL); |
| clean_demultiplex_info(server); |
| |
| /* if server->tsk was NULL then wait for a signal before exiting */ |
| if (!task_to_wake) { |
| set_current_state(TASK_INTERRUPTIBLE); |
| while (!signal_pending(current)) { |
| schedule(); |
| set_current_state(TASK_INTERRUPTIBLE); |
| } |
| set_current_state(TASK_RUNNING); |
| } |
| |
| module_put_and_exit(0); |
| } |
| |
| /* extract the host portion of the UNC string */ |
| static char * |
| extract_hostname(const char *unc) |
| { |
| const char *src; |
| char *dst, *delim; |
| unsigned int len; |
| |
| /* skip double chars at beginning of string */ |
| /* BB: check validity of these bytes? */ |
| src = unc + 2; |
| |
| /* delimiter between hostname and sharename is always '\\' now */ |
| delim = strchr(src, '\\'); |
| if (!delim) |
| return ERR_PTR(-EINVAL); |
| |
| len = delim - src; |
| dst = kmalloc((len + 1), GFP_KERNEL); |
| if (dst == NULL) |
| return ERR_PTR(-ENOMEM); |
| |
| memcpy(dst, src, len); |
| dst[len] = '\0'; |
| |
| return dst; |
| } |
| |
| static int get_option_ul(substring_t args[], unsigned long *option) |
| { |
| int rc; |
| char *string; |
| |
| string = match_strdup(args); |
| if (string == NULL) |
| return -ENOMEM; |
| rc = kstrtoul(string, 0, option); |
| kfree(string); |
| |
| return rc; |
| } |
| |
| static int get_option_uid(substring_t args[], kuid_t *result) |
| { |
| unsigned long value; |
| kuid_t uid; |
| int rc; |
| |
| rc = get_option_ul(args, &value); |
| if (rc) |
| return rc; |
| |
| uid = make_kuid(current_user_ns(), value); |
| if (!uid_valid(uid)) |
| return -EINVAL; |
| |
| *result = uid; |
| return 0; |
| } |
| |
| static int get_option_gid(substring_t args[], kgid_t *result) |
| { |
| unsigned long value; |
| kgid_t gid; |
| int rc; |
| |
| rc = get_option_ul(args, &value); |
| if (rc) |
| return rc; |
| |
| gid = make_kgid(current_user_ns(), value); |
| if (!gid_valid(gid)) |
| return -EINVAL; |
| |
| *result = gid; |
| return 0; |
| } |
| |
| static int cifs_parse_security_flavors(char *value, |
| struct smb_vol *vol) |
| { |
| |
| substring_t args[MAX_OPT_ARGS]; |
| |
| /* |
| * With mount options, the last one should win. Reset any existing |
| * settings back to default. |
| */ |
| vol->sectype = Unspecified; |
| vol->sign = false; |
| |
| switch (match_token(value, cifs_secflavor_tokens, args)) { |
| case Opt_sec_krb5p: |
| cifs_dbg(VFS, "sec=krb5p is not supported!\n"); |
| return 1; |
| case Opt_sec_krb5i: |
| vol->sign = true; |
| /* Fallthrough */ |
| case Opt_sec_krb5: |
| vol->sectype = Kerberos; |
| break; |
| case Opt_sec_ntlmsspi: |
| vol->sign = true; |
| /* Fallthrough */ |
| case Opt_sec_ntlmssp: |
| vol->sectype = RawNTLMSSP; |
| break; |
| case Opt_sec_ntlmi: |
| vol->sign = true; |
| /* Fallthrough */ |
| case Opt_ntlm: |
| vol->sectype = NTLM; |
| break; |
| case Opt_sec_ntlmv2i: |
| vol->sign = true; |
| /* Fallthrough */ |
| case Opt_sec_ntlmv2: |
| vol->sectype = NTLMv2; |
| break; |
| #ifdef CONFIG_CIFS_WEAK_PW_HASH |
| case Opt_sec_lanman: |
| vol->sectype = LANMAN; |
| break; |
| #endif |
| case Opt_sec_none: |
| vol->nullauth = 1; |
| break; |
| default: |
| cifs_dbg(VFS, "bad security option: %s\n", value); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| cifs_parse_cache_flavor(char *value, struct smb_vol *vol) |
| { |
| substring_t args[MAX_OPT_ARGS]; |
| |
| switch (match_token(value, cifs_cacheflavor_tokens, args)) { |
| case Opt_cache_loose: |
| vol->direct_io = false; |
| vol->strict_io = false; |
| break; |
| case Opt_cache_strict: |
| vol->direct_io = false; |
| vol->strict_io = true; |
| break; |
| case Opt_cache_none: |
| vol->direct_io = true; |
| vol->strict_io = false; |
| break; |
| default: |
| cifs_dbg(VFS, "bad cache= option: %s\n", value); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int |
| cifs_parse_smb_version(char *value, struct smb_vol *vol) |
| { |
| substring_t args[MAX_OPT_ARGS]; |
| |
| switch (match_token(value, cifs_smb_version_tokens, args)) { |
| case Smb_1: |
| vol->ops = &smb1_operations; |
| vol->vals = &smb1_values; |
| break; |
| #ifdef CONFIG_CIFS_SMB2 |
| case Smb_20: |
| vol->ops = &smb20_operations; |
| vol->vals = &smb20_values; |
| break; |
| case Smb_21: |
| vol->ops = &smb21_operations; |
| vol->vals = &smb21_values; |
| break; |
| case Smb_30: |
| vol->ops = &smb30_operations; |
| vol->vals = &smb30_values; |
| break; |
| case Smb_302: |
| vol->ops = &smb30_operations; /* currently identical with 3.0 */ |
| vol->vals = &smb302_values; |
| break; |
| #ifdef CONFIG_CIFS_SMB311 |
| case Smb_311: |
| vol->ops = &smb311_operations; |
| vol->vals = &smb311_values; |
| break; |
| #endif /* SMB311 */ |
| #endif |
| default: |
| cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* |
| * Parse a devname into substrings and populate the vol->UNC and vol->prepath |
| * fields with the result. Returns 0 on success and an error otherwise. |
| */ |
| static int |
| cifs_parse_devname(const char *devname, struct smb_vol *vol) |
| { |
| char *pos; |
| const char *delims = "/\\"; |
| size_t len; |
| |
| /* make sure we have a valid UNC double delimiter prefix */ |
| len = strspn(devname, delims); |
| if (len != 2) |
| return -EINVAL; |
| |
| /* find delimiter between host and sharename */ |
| pos = strpbrk(devname + 2, delims); |
| if (!pos) |
| return -EINVAL; |
| |
| /* skip past delimiter */ |
| ++pos; |
| |
| /* now go until next delimiter or end of string */ |
| len = strcspn(pos, delims); |
| |
| /* move "pos" up to delimiter or NULL */ |
| pos += len; |
| vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); |
| if (!vol->UNC) |
| return -ENOMEM; |
| |
| convert_delimiter(vol->UNC, '\\'); |
| |
| /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ |
| if (!*pos++ || !*pos) |
| return 0; |
| |
| vol->prepath = kstrdup(pos, GFP_KERNEL); |
| if (!vol->prepath) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int |
| cifs_parse_mount_options(const char *mountdata, const char *devname, |
| struct smb_vol *vol) |
| { |
| char *data, *end; |
| char *mountdata_copy = NULL, *options; |
| unsigned int temp_len, i, j; |
| char separator[2]; |
| short int override_uid = -1; |
| short int override_gid = -1; |
| bool uid_specified = false; |
| bool gid_specified = false; |
| bool sloppy = false; |
| char *invalid = NULL; |
| char *nodename = utsname()->nodename; |
| char *string = NULL; |
| char *tmp_end, *value; |
| char delim; |
| bool got_ip = false; |
| unsigned short port = 0; |
| struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; |
| |
| separator[0] = ','; |
| separator[1] = 0; |
| delim = separator[0]; |
| |
| /* ensure we always start with zeroed-out smb_vol */ |
| memset(vol, 0, sizeof(*vol)); |
| |
| /* |
| * does not have to be perfect mapping since field is |
| * informational, only used for servers that do not support |
| * port 445 and it can be overridden at mount time |
| */ |
| memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
| for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) |
| vol->source_rfc1001_name[i] = toupper(nodename[i]); |
| |
| vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
| /* null target name indicates to use *SMBSERVR default called name |
| if we end up sending RFC1001 session initialize */ |
| vol->target_rfc1001_name[0] = 0; |
| vol->cred_uid = current_uid(); |
| vol->linux_uid = current_uid(); |
| vol->linux_gid = current_gid(); |
| |
| /* |
| * default to SFM style remapping of seven reserved characters |
| * unless user overrides it or we negotiate CIFS POSIX where |
| * it is unnecessary. Can not simultaneously use more than one mapping |
| * since then readdir could list files that open could not open |
| */ |
| vol->remap = true; |
| |
| /* default to only allowing write access to owner of the mount */ |
| vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; |
| |
| /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ |
| /* default is always to request posix paths. */ |
| vol->posix_paths = 1; |
| /* default to using server inode numbers where available */ |
| vol->server_ino = 1; |
| |
| /* default is to use strict cifs caching semantics */ |
| vol->strict_io = true; |
| |
| vol->actimeo = CIFS_DEF_ACTIMEO; |
| |
| /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
| vol->ops = &smb1_operations; |
| vol->vals = &smb1_values; |
| |
| if (!mountdata) |
| goto cifs_parse_mount_err; |
| |
| mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); |
| if (!mountdata_copy) |
| goto cifs_parse_mount_err; |
| |
| options = mountdata_copy; |
| end = options + strlen(options); |
| |
| if (strncmp(options, "sep=", 4) == 0) { |
| if (options[4] != 0) { |
| separator[0] = options[4]; |
| options += 5; |
| } else { |
| cifs_dbg(FYI, "Null separator not allowed\n"); |
| } |
| } |
| vol->backupuid_specified = false; /* no backup intent for a user */ |
| vol->backupgid_specified = false; /* no backup intent for a group */ |
| |
| switch (cifs_parse_devname(devname, vol)) { |
| case 0: |
| break; |
| case -ENOMEM: |
| cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); |
| goto cifs_parse_mount_err; |
| case -EINVAL: |
| cifs_dbg(VFS, "Malformed UNC in devname.\n"); |
| goto cifs_parse_mount_err; |
| default: |
| cifs_dbg(VFS, "Unknown error parsing devname.\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| while ((data = strsep(&options, separator)) != NULL) { |
| substring_t args[MAX_OPT_ARGS]; |
| unsigned long option; |
| int token; |
| |
| if (!*data) |
| continue; |
| |
| token = match_token(data, cifs_mount_option_tokens, args); |
| |
| switch (token) { |
| |
| /* Ingnore the following */ |
| case Opt_ignore: |
| break; |
| |
| /* Boolean values */ |
| case Opt_user_xattr: |
| vol->no_xattr = 0; |
| break; |
| case Opt_nouser_xattr: |
| vol->no_xattr = 1; |
| break; |
| case Opt_forceuid: |
| override_uid = 1; |
| break; |
| case Opt_noforceuid: |
| override_uid = 0; |
| break; |
| case Opt_forcegid: |
| override_gid = 1; |
| break; |
| case Opt_noforcegid: |
| override_gid = 0; |
| break; |
| case Opt_noblocksend: |
| vol->noblocksnd = 1; |
| break; |
| case Opt_noautotune: |
| vol->noautotune = 1; |
| break; |
| case Opt_hard: |
| vol->retry = 1; |
| break; |
| case Opt_soft: |
| vol->retry = 0; |
| break; |
| case Opt_perm: |
| vol->noperm = 0; |
| break; |
| case Opt_noperm: |
| vol->noperm = 1; |
| break; |
| case Opt_mapchars: |
| vol->sfu_remap = true; |
| vol->remap = false; /* disable SFM mapping */ |
| break; |
| case Opt_nomapchars: |
| vol->sfu_remap = false; |
| break; |
| case Opt_mapposix: |
| vol->remap = true; |
| vol->sfu_remap = false; /* disable SFU mapping */ |
| break; |
| case Opt_nomapposix: |
| vol->remap = false; |
| break; |
| case Opt_sfu: |
| vol->sfu_emul = 1; |
| break; |
| case Opt_nosfu: |
| vol->sfu_emul = 0; |
| break; |
| case Opt_nodfs: |
| vol->nodfs = 1; |
| break; |
| case Opt_posixpaths: |
| vol->posix_paths = 1; |
| break; |
| case Opt_noposixpaths: |
| vol->posix_paths = 0; |
| break; |
| case Opt_nounix: |
| vol->no_linux_ext = 1; |
| break; |
| case Opt_nocase: |
| vol->nocase = 1; |
| break; |
| case Opt_brl: |
| vol->nobrl = 0; |
| break; |
| case Opt_nobrl: |
| vol->nobrl = 1; |
| /* |
| * turn off mandatory locking in mode |
| * if remote locking is turned off since the |
| * local vfs will do advisory |
| */ |
| if (vol->file_mode == |
| (S_IALLUGO & ~(S_ISUID | S_IXGRP))) |
| vol->file_mode = S_IALLUGO; |
| break; |
| case Opt_forcemandatorylock: |
| vol->mand_lock = 1; |
| break; |
| case Opt_setuids: |
| vol->setuids = 1; |
| break; |
| case Opt_nosetuids: |
| vol->setuids = 0; |
| break; |
| case Opt_dynperm: |
| vol->dynperm = true; |
| break; |
| case Opt_nodynperm: |
| vol->dynperm = false; |
| break; |
| case Opt_nohard: |
| vol->retry = 0; |
| break; |
| case Opt_nosoft: |
| vol->retry = 1; |
| break; |
| case Opt_nointr: |
| vol->intr = 0; |
| break; |
| case Opt_intr: |
| vol->intr = 1; |
| break; |
| case Opt_nostrictsync: |
| vol->nostrictsync = 1; |
| break; |
| case Opt_strictsync: |
| vol->nostrictsync = 0; |
| break; |
| case Opt_serverino: |
| vol->server_ino = 1; |
| break; |
| case Opt_noserverino: |
| vol->server_ino = 0; |
| break; |
| case Opt_rwpidforward: |
| vol->rwpidforward = 1; |
| break; |
| case Opt_cifsacl: |
| vol->cifs_acl = 1; |
| break; |
| case Opt_nocifsacl: |
| vol->cifs_acl = 0; |
| break; |
| case Opt_acl: |
| vol->no_psx_acl = 0; |
| break; |
| case Opt_noacl: |
| vol->no_psx_acl = 1; |
| break; |
| case Opt_locallease: |
| vol->local_lease = 1; |
| break; |
| case Opt_sign: |
| vol->sign = true; |
| break; |
| case Opt_seal: |
| /* we do not do the following in secFlags because seal |
| * is a per tree connection (mount) not a per socket |
| * or per-smb connection option in the protocol |
| * vol->secFlg |= CIFSSEC_MUST_SEAL; |
| */ |
| vol->seal = 1; |
| break; |
| case Opt_noac: |
| pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
| break; |
| case Opt_fsc: |
| #ifndef CONFIG_CIFS_FSCACHE |
| cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
| goto cifs_parse_mount_err; |
| #endif |
| vol->fsc = true; |
| break; |
| case Opt_mfsymlinks: |
| vol->mfsymlinks = true; |
| break; |
| case Opt_multiuser: |
| vol->multiuser = true; |
| break; |
| case Opt_sloppy: |
| sloppy = true; |
| break; |
| case Opt_nosharesock: |
| vol->nosharesock = true; |
| break; |
| case Opt_nopersistent: |
| vol->nopersistent = true; |
| if (vol->persistent) { |
| cifs_dbg(VFS, |
| "persistenthandles mount options conflict\n"); |
| goto cifs_parse_mount_err; |
| } |
| break; |
| case Opt_persistent: |
| vol->persistent = true; |
| if ((vol->nopersistent) || (vol->resilient)) { |
| cifs_dbg(VFS, |
| "persistenthandles mount options conflict\n"); |
| goto cifs_parse_mount_err; |
| } |
| break; |
| case Opt_resilient: |
| vol->resilient = true; |
| if (vol->persistent) { |
| cifs_dbg(VFS, |
| "persistenthandles mount options conflict\n"); |
| goto cifs_parse_mount_err; |
| } |
| break; |
| case Opt_noresilient: |
| vol->resilient = false; /* already the default */ |
| break; |
| |
| /* Numeric Values */ |
| case Opt_backupuid: |
| if (get_option_uid(args, &vol->backupuid)) { |
| cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->backupuid_specified = true; |
| break; |
| case Opt_backupgid: |
| if (get_option_gid(args, &vol->backupgid)) { |
| cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->backupgid_specified = true; |
| break; |
| case Opt_uid: |
| if (get_option_uid(args, &vol->linux_uid)) { |
| cifs_dbg(VFS, "%s: Invalid uid value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| uid_specified = true; |
| break; |
| case Opt_cruid: |
| if (get_option_uid(args, &vol->cred_uid)) { |
| cifs_dbg(VFS, "%s: Invalid cruid value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| break; |
| case Opt_gid: |
| if (get_option_gid(args, &vol->linux_gid)) { |
| cifs_dbg(VFS, "%s: Invalid gid value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| gid_specified = true; |
| break; |
| case Opt_file_mode: |
| if (get_option_ul(args, &option)) { |
| cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->file_mode = option; |
| break; |
| case Opt_dirmode: |
| if (get_option_ul(args, &option)) { |
| cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->dir_mode = option; |
| break; |
| case Opt_port: |
| if (get_option_ul(args, &option) || |
| option > USHRT_MAX) { |
| cifs_dbg(VFS, "%s: Invalid port value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| port = (unsigned short)option; |
| break; |
| case Opt_rsize: |
| if (get_option_ul(args, &option)) { |
| cifs_dbg(VFS, "%s: Invalid rsize value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->rsize = option; |
| break; |
| case Opt_wsize: |
| if (get_option_ul(args, &option)) { |
| cifs_dbg(VFS, "%s: Invalid wsize value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->wsize = option; |
| break; |
| case Opt_actimeo: |
| if (get_option_ul(args, &option)) { |
| cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
| __func__); |
| goto cifs_parse_mount_err; |
| } |
| vol->actimeo = HZ * option; |
| if (vol->actimeo > CIFS_MAX_ACTIMEO) { |
| cifs_dbg(VFS, "attribute cache timeout too large\n"); |
| goto cifs_parse_mount_err; |
| } |
| break; |
| |
| /* String Arguments */ |
| |
| case Opt_blank_user: |
| /* null user, ie. anonymous authentication */ |
| vol->nullauth = 1; |
| vol->username = NULL; |
| break; |
| case Opt_user: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
| CIFS_MAX_USERNAME_LEN) { |
| pr_warn("CIFS: username too long\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| kfree(vol->username); |
| vol->username = kstrdup(string, GFP_KERNEL); |
| if (!vol->username) |
| goto cifs_parse_mount_err; |
| break; |
| case Opt_blank_pass: |
| /* passwords have to be handled differently |
| * to allow the character used for deliminator |
| * to be passed within them |
| */ |
| |
| /* |
| * Check if this is a case where the password |
| * starts with a delimiter |
| */ |
| tmp_end = strchr(data, '='); |
| tmp_end++; |
| if (!(tmp_end < end && tmp_end[1] == delim)) { |
| /* No it is not. Set the password to NULL */ |
| kfree(vol->password); |
| vol->password = NULL; |
| break; |
| } |
| /* Yes it is. Drop down to Opt_pass below.*/ |
| case Opt_pass: |
| /* Obtain the value string */ |
| value = strchr(data, '='); |
| value++; |
| |
| /* Set tmp_end to end of the string */ |
| tmp_end = (char *) value + strlen(value); |
| |
| /* Check if following character is the deliminator |
| * If yes, we have encountered a double deliminator |
| * reset the NULL character to the deliminator |
| */ |
| if (tmp_end < end && tmp_end[1] == delim) { |
| tmp_end[0] = delim; |
| |
| /* Keep iterating until we get to a single |
| * deliminator OR the end |
| */ |
| while ((tmp_end = strchr(tmp_end, delim)) |
| != NULL && (tmp_end[1] == delim)) { |
| tmp_end = (char *) &tmp_end[2]; |
| } |
| |
| /* Reset var options to point to next element */ |
| if (tmp_end) { |
| tmp_end[0] = '\0'; |
| options = (char *) &tmp_end[1]; |
| } else |
| /* Reached the end of the mount option |
| * string */ |
| options = end; |
| } |
| |
| kfree(vol->password); |
| /* Now build new password string */ |
| temp_len = strlen(value); |
| vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
| if (vol->password == NULL) { |
| pr_warn("CIFS: no memory for password\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| for (i = 0, j = 0; i < temp_len; i++, j++) { |
| vol->password[j] = value[i]; |
| if ((value[i] == delim) && |
| value[i+1] == delim) |
| /* skip the second deliminator */ |
| i++; |
| } |
| vol->password[j] = '\0'; |
| break; |
| case Opt_blank_ip: |
| /* FIXME: should this be an error instead? */ |
| got_ip = false; |
| break; |
| case Opt_ip: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (!cifs_convert_address(dstaddr, string, |
| strlen(string))) { |
| pr_err("CIFS: bad ip= option (%s).\n", string); |
| goto cifs_parse_mount_err; |
| } |
| got_ip = true; |
| break; |
| case Opt_domain: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
| == CIFS_MAX_DOMAINNAME_LEN) { |
| pr_warn("CIFS: domain name too long\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| kfree(vol->domainname); |
| vol->domainname = kstrdup(string, GFP_KERNEL); |
| if (!vol->domainname) { |
| pr_warn("CIFS: no memory for domainname\n"); |
| goto cifs_parse_mount_err; |
| } |
| cifs_dbg(FYI, "Domain name set\n"); |
| break; |
| case Opt_srcaddr: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (!cifs_convert_address( |
| (struct sockaddr *)&vol->srcaddr, |
| string, strlen(string))) { |
| pr_warn("CIFS: Could not parse srcaddr: %s\n", |
| string); |
| goto cifs_parse_mount_err; |
| } |
| break; |
| case Opt_iocharset: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (strnlen(string, 1024) >= 65) { |
| pr_warn("CIFS: iocharset name too long.\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| if (strncasecmp(string, "default", 7) != 0) { |
| kfree(vol->iocharset); |
| vol->iocharset = kstrdup(string, |
| GFP_KERNEL); |
| if (!vol->iocharset) { |
| pr_warn("CIFS: no memory for charset\n"); |
| goto cifs_parse_mount_err; |
| } |
| } |
| /* if iocharset not set then load_nls_default |
| * is used by caller |
| */ |
| cifs_dbg(FYI, "iocharset set to %s\n", string); |
| break; |
| case Opt_netbiosname: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| memset(vol->source_rfc1001_name, 0x20, |
| RFC1001_NAME_LEN); |
| /* |
| * FIXME: are there cases in which a comma can |
| * be valid in workstation netbios name (and |
| * need special handling)? |
| */ |
| for (i = 0; i < RFC1001_NAME_LEN; i++) { |
| /* don't ucase netbiosname for user */ |
| if (string[i] == 0) |
| break; |
| vol->source_rfc1001_name[i] = string[i]; |
| } |
| /* The string has 16th byte zero still from |
| * set at top of the function |
| */ |
| if (i == RFC1001_NAME_LEN && string[i] != 0) |
| pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
| break; |
| case Opt_servern: |
| /* servernetbiosname specified override *SMBSERVER */ |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| /* last byte, type, is 0x20 for servr type */ |
| memset(vol->target_rfc1001_name, 0x20, |
| RFC1001_NAME_LEN_WITH_NULL); |
| |
| /* BB are there cases in which a comma can be |
| valid in this workstation netbios name |
| (and need special handling)? */ |
| |
| /* user or mount helper must uppercase the |
| netbios name */ |
| for (i = 0; i < 15; i++) { |
| if (string[i] == 0) |
| break; |
| vol->target_rfc1001_name[i] = string[i]; |
| } |
| /* The string has 16th byte zero still from |
| set at top of the function */ |
| if (i == RFC1001_NAME_LEN && string[i] != 0) |
| pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
| break; |
| case Opt_ver: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (strncasecmp(string, "1", 1) == 0) { |
| /* This is the default */ |
| break; |
| } |
| /* For all other value, error */ |
| pr_warn("CIFS: Invalid version specified\n"); |
| goto cifs_parse_mount_err; |
| case Opt_vers: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (cifs_parse_smb_version(string, vol) != 0) |
| goto cifs_parse_mount_err; |
| break; |
| case Opt_sec: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (cifs_parse_security_flavors(string, vol) != 0) |
| goto cifs_parse_mount_err; |
| break; |
| case Opt_cache: |
| string = match_strdup(args); |
| if (string == NULL) |
| goto out_nomem; |
| |
| if (cifs_parse_cache_flavor(string, vol) != 0) |
| goto cifs_parse_mount_err; |
| break; |
| default: |
| /* |
| * An option we don't recognize. Save it off for later |
| * if we haven't already found one |
| */ |
| if (!invalid) |
| invalid = data; |
| break; |
| } |
| /* Free up any allocated string */ |
| kfree(string); |
| string = NULL; |
| } |
| |
| if (!sloppy && invalid) { |
| pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
| goto cifs_parse_mount_err; |
| } |
| |
| #ifndef CONFIG_KEYS |
| /* Muliuser mounts require CONFIG_KEYS support */ |
| if (vol->multiuser) { |
| cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
| goto cifs_parse_mount_err; |
| } |
| #endif |
| if (!vol->UNC) { |
| cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| /* make sure UNC has a share name */ |
| if (!strchr(vol->UNC + 3, '\\')) { |
| cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
| goto cifs_parse_mount_err; |
| } |
| |
| if (!got_ip) { |
| /* No ip= option specified? Try to get it from UNC */ |
| if (!cifs_convert_address(dstaddr, &vol->UNC[2], |
| strlen(&vol->UNC[2]))) { |
| pr_err("Unable to determine destination address.\n"); |
| goto cifs_parse_mount_err; |
| } |
| } |
| |
| /* set the port that we got earlier */ |
| cifs_set_port(dstaddr, port); |
| |
| if (uid_specified) |
| vol->override_uid = override_uid; |
| else if (override_uid == 1) |
| pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
| |
| if (gid_specified) |
| vol->override_gid = override_gid; |
| else if (override_gid == 1) |
| pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
| |
| kfree(mountdata_copy); |
| return 0; |
| |
| out_nomem: |
| pr_warn("Could not allocate temporary buffer\n"); |
| cifs_parse_mount_err: |
| kfree(string); |
| kfree(mountdata_copy); |
| return 1; |
| } |
| |
| /** Returns true if srcaddr isn't specified and rhs isn't |
| * specified, or if srcaddr is specified and |
| * matches the IP address of the rhs argument. |
| */ |
| static bool |
| srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) |
| { |
| switch (srcaddr->sa_family) { |
| case AF_UNSPEC: |
| return (rhs->sa_family == AF_UNSPEC); |
| case AF_INET: { |
| struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; |
| struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; |
| return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); |
| } |
| case AF_INET6: { |
| struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; |
| struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
| return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
| } |
| default: |
| WARN_ON(1); |
| return false; /* don't expect to be here */ |
| } |
| } |
| |
| /* |
| * If no port is specified in addr structure, we try to match with 445 port |
| * and if it fails - with 139 ports. It should be called only if address |
| * families of server and addr are equal. |
| */ |
| static bool |
| match_port(struct TCP_Server_Info *server, struct sockaddr *addr) |
| { |
| __be16 port, *sport; |
| |
| switch (addr->sa_family) { |
| case AF_INET: |
| sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; |
| port = ((struct sockaddr_in *) addr)->sin_port; |
| break; |
| case AF_INET6: |
| sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; |
| port = ((struct sockaddr_in6 *) addr)->sin6_port; |
| break; |
| default: |
| WARN_ON(1); |
| return false; |
| } |
| |
| if (!port) { |
| port = htons(CIFS_PORT); |
| if (port == *sport) |
| return true; |
| |
| port = htons(RFC1001_PORT); |
| } |
| |
| return port == *sport; |
| } |
| |
| static bool |
| match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
| struct sockaddr *srcaddr) |
| { |
| switch (addr->sa_family) { |
| case AF_INET: { |
| struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; |
| struct sockaddr_in *srv_addr4 = |
| (struct sockaddr_in *)&server->dstaddr; |
| |
| if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) |
| return false; |
| break; |
| } |
| case AF_INET6: { |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; |
| struct sockaddr_in6 *srv_addr6 = |
| (struct sockaddr_in6 *)&server->dstaddr; |
| |
| if (!ipv6_addr_equal(&addr6->sin6_addr, |
| &srv_addr6->sin6_addr)) |
| return false; |
| if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
| return false; |
| break; |
| } |
| default: |
| WARN_ON(1); |
| return false; /* don't expect to be here */ |
| } |
| |
| if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
| return false; |
| |
| return true; |
| } |
| |
| static bool |
| match_security(struct TCP_Server_Info *server, struct smb_vol *vol) |
| { |
| /* |
| * The select_sectype function should either return the vol->sectype |
| * that was specified, or "Unspecified" if that sectype was not |
| * compatible with the given NEGOTIATE request. |
| */ |
| if (select_sectype(server, vol->sectype) == Unspecified) |
| return false; |
| |
| /* |
| * Now check if signing mode is acceptable. No need to check |
| * global_secflags at this point since if MUST_SIGN is set then |
| * the server->sign had better be too. |
| */ |
| if (vol->sign && !server->sign) |
| return false; |
| |
| return true; |
| } |
| |
| static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
| { |
| struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
| |
| if (vol->nosharesock) |
| return 0; |
| |
| if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
| return 0; |
| |
| if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
| return 0; |
| |
| if (!match_address(server, addr, |
| (struct sockaddr *)&vol->srcaddr)) |
| return 0; |
| |
| if (!match_port(server, addr)) |
| return 0; |
| |
| if (!match_security(server, vol)) |
| return 0; |
| |
| return 1; |
| } |
| |
| static struct TCP_Server_Info * |
| cifs_find_tcp_session(struct smb_vol *vol) |
| { |
| struct TCP_Server_Info *server; |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
| if (!match_server(server, vol)) |
| continue; |
| |
| ++server->srv_count; |
| spin_unlock(&cifs_tcp_ses_lock); |
| cifs_dbg(FYI, "Existing tcp session with server found\n"); |
| return server; |
| } |
| spin_unlock(&cifs_tcp_ses_lock); |
| return NULL; |
| } |
| |
| static void |
| cifs_put_tcp_session(struct TCP_Server_Info *server) |
| { |
| struct task_struct *task; |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| if (--server->srv_count > 0) { |
| spin_unlock(&cifs_tcp_ses_lock); |
| return; |
| } |
| |
| put_net(cifs_net_ns(server)); |
| |
| list_del_init(&server->tcp_ses_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| cancel_delayed_work_sync(&server->echo); |
| |
| spin_lock(&GlobalMid_Lock); |
| server->tcpStatus = CifsExiting; |
| spin_unlock(&GlobalMid_Lock); |
| |
| cifs_crypto_shash_release(server); |
| cifs_fscache_release_client_cookie(server); |
| |
| kfree(server->session_key.response); |
| server->session_key.response = NULL; |
| server->session_key.len = 0; |
| |
| task = xchg(&server->tsk, NULL); |
| if (task) |
| force_sig(SIGKILL, task); |
| } |
| |
| static struct TCP_Server_Info * |
| cifs_get_tcp_session(struct smb_vol *volume_info) |
| { |
| struct TCP_Server_Info *tcp_ses = NULL; |
| int rc; |
| |
| cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
| |
| /* see if we already have a matching tcp_ses */ |
| tcp_ses = cifs_find_tcp_session(volume_info); |
| if (tcp_ses) |
| return tcp_ses; |
| |
| tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); |
| if (!tcp_ses) { |
| rc = -ENOMEM; |
| goto out_err; |
| } |
| |
| tcp_ses->ops = volume_info->ops; |
| tcp_ses->vals = volume_info->vals; |
| cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
| tcp_ses->hostname = extract_hostname(volume_info->UNC); |
| if (IS_ERR(tcp_ses->hostname)) { |
| rc = PTR_ERR(tcp_ses->hostname); |
| goto out_err_crypto_release; |
| } |
| |
| tcp_ses->noblocksnd = volume_info->noblocksnd; |
| tcp_ses->noautotune = volume_info->noautotune; |
| tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
| tcp_ses->in_flight = 0; |
| tcp_ses->credits = 1; |
| init_waitqueue_head(&tcp_ses->response_q); |
| init_waitqueue_head(&tcp_ses->request_q); |
| INIT_LIST_HEAD(&tcp_ses->pending_mid_q); |
| mutex_init(&tcp_ses->srv_mutex); |
| memcpy(tcp_ses->workstation_RFC1001_name, |
| volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
| memcpy(tcp_ses->server_RFC1001_name, |
| volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
| tcp_ses->session_estab = false; |
| tcp_ses->sequence_number = 0; |
| tcp_ses->lstrp = jiffies; |
| spin_lock_init(&tcp_ses->req_lock); |
| INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
| INIT_LIST_HEAD(&tcp_ses->smb_ses_list); |
| INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
| memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
| sizeof(tcp_ses->srcaddr)); |
| memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, |
| sizeof(tcp_ses->dstaddr)); |
| #ifdef CONFIG_CIFS_SMB2 |
| get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE); |
| #endif |
| /* |
| * at this point we are the only ones with the pointer |
| * to the struct since the kernel thread not created yet |
| * no need to spinlock this init of tcpStatus or srv_count |
| */ |
| tcp_ses->tcpStatus = CifsNew; |
| ++tcp_ses->srv_count; |
| |
| rc = ip_connect(tcp_ses); |
| if (rc < 0) { |
| cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
| goto out_err_crypto_release; |
| } |
| |
| /* |
| * since we're in a cifs function already, we know that |
| * this will succeed. No need for try_module_get(). |
| */ |
| __module_get(THIS_MODULE); |
| tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
| tcp_ses, "cifsd"); |
| if (IS_ERR(tcp_ses->tsk)) { |
| rc = PTR_ERR(tcp_ses->tsk); |
| cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
| module_put(THIS_MODULE); |
| goto out_err_crypto_release; |
| } |
| tcp_ses->tcpStatus = CifsNeedNegotiate; |
| |
| /* thread spawned, put it on the list */ |
| spin_lock(&cifs_tcp_ses_lock); |
| list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| cifs_fscache_get_client_cookie(tcp_ses); |
| |
| /* queue echo request delayed work */ |
| queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
| |
| return tcp_ses; |
| |
| out_err_crypto_release: |
| cifs_crypto_shash_release(tcp_ses); |
| |
| put_net(cifs_net_ns(tcp_ses)); |
| |
| out_err: |
| if (tcp_ses) { |
| if (!IS_ERR(tcp_ses->hostname)) |
| kfree(tcp_ses->hostname); |
| if (tcp_ses->ssocket) |
| sock_release(tcp_ses->ssocket); |
| kfree(tcp_ses); |
| } |
| return ERR_PTR(rc); |
| } |
| |
| static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
| { |
| if (vol->sectype != Unspecified && |
| vol->sectype != ses->sectype) |
| return 0; |
| |
| switch (ses->sectype) { |
| case Kerberos: |
| if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
| return 0; |
| break; |
| default: |
| /* NULL username means anonymous session */ |
| if (ses->user_name == NULL) { |
| if (!vol->nullauth) |
| return 0; |
| break; |
| } |
| |
| /* anything else takes username/password */ |
| if (strncmp(ses->user_name, |
| vol->username ? vol->username : "", |
| CIFS_MAX_USERNAME_LEN)) |
| return 0; |
| if ((vol->username && strlen(vol->username) != 0) && |
| ses->password != NULL && |
| strncmp(ses->password, |
| vol->password ? vol->password : "", |
| CIFS_MAX_PASSWORD_LEN)) |
| return 0; |
| } |
| return 1; |
| } |
| |
| static struct cifs_ses * |
| cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
| { |
| struct cifs_ses *ses; |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
| if (ses->status == CifsExiting) |
| continue; |
| if (!match_session(ses, vol)) |
| continue; |
| ++ses->ses_count; |
| spin_unlock(&cifs_tcp_ses_lock); |
| return ses; |
| } |
| spin_unlock(&cifs_tcp_ses_lock); |
| return NULL; |
| } |
| |
| static void |
| cifs_put_smb_ses(struct cifs_ses *ses) |
| { |
| unsigned int rc, xid; |
| struct TCP_Server_Info *server = ses->server; |
| |
| cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| if (ses->status == CifsExiting) { |
| spin_unlock(&cifs_tcp_ses_lock); |
| return; |
| } |
| if (--ses->ses_count > 0) { |
| spin_unlock(&cifs_tcp_ses_lock); |
| return; |
| } |
| if (ses->status == CifsGood) |
| ses->status = CifsExiting; |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| if (ses->status == CifsExiting && server->ops->logoff) { |
| xid = get_xid(); |
| rc = server->ops->logoff(xid, ses); |
| if (rc) |
| cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", |
| __func__, rc); |
| _free_xid(xid); |
| } |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| list_del_init(&ses->smb_ses_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| sesInfoFree(ses); |
| cifs_put_tcp_session(server); |
| } |
| |
| #ifdef CONFIG_KEYS |
| |
| /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
| #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) |
| |
| /* Populate username and pw fields from keyring if possible */ |
| static int |
| cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) |
| { |
| int rc = 0; |
| const char *delim, *payload; |
| char *desc; |
| ssize_t len; |
| struct key *key; |
| struct TCP_Server_Info *server = ses->server; |
| struct sockaddr_in *sa; |
| struct sockaddr_in6 *sa6; |
| const struct user_key_payload *upayload; |
| |
| desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); |
| if (!desc) |
| return -ENOMEM; |
| |
| /* try to find an address key first */ |
| switch (server->dstaddr.ss_family) { |
| case AF_INET: |
| sa = (struct sockaddr_in *)&server->dstaddr; |
| sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); |
| break; |
| case AF_INET6: |
| sa6 = (struct sockaddr_in6 *)&server->dstaddr; |
| sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); |
| break; |
| default: |
| cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
| server->dstaddr.ss_family); |
| rc = -EINVAL; |
| goto out_err; |
| } |
| |
| cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
| key = request_key(&key_type_logon, desc, ""); |
| if (IS_ERR(key)) { |
| if (!ses->domainName) { |
| cifs_dbg(FYI, "domainName is NULL\n"); |
| rc = PTR_ERR(key); |
| goto out_err; |
| } |
| |
| /* didn't work, try to find a domain key */ |
| sprintf(desc, "cifs:d:%s", ses->domainName); |
| cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
| key = request_key(&key_type_logon, desc, ""); |
| if (IS_ERR(key)) { |
| rc = PTR_ERR(key); |
| goto out_err; |
| } |
| } |
| |
| down_read(&key->sem); |
| upayload = user_key_payload(key); |
| if (IS_ERR_OR_NULL(upayload)) { |
| rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
| goto out_key_put; |
| } |
| |
| /* find first : in payload */ |
| payload = upayload->data; |
| delim = strnchr(payload, upayload->datalen, ':'); |
| cifs_dbg(FYI, "payload=%s\n", payload); |
| if (!delim) { |
| cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
| upayload->datalen); |
| rc = -EINVAL; |
| goto out_key_put; |
| } |
| |
| len = delim - payload; |
| if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
| cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
| len); |
| rc = -EINVAL; |
| goto out_key_put; |
| } |
| |
| vol->username = kstrndup(payload, len, GFP_KERNEL); |
| if (!vol->username) { |
| cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
| len); |
| rc = -ENOMEM; |
| goto out_key_put; |
| } |
| cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
| |
| len = key->datalen - (len + 1); |
| if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
| cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
| rc = -EINVAL; |
| kfree(vol->username); |
| vol->username = NULL; |
| goto out_key_put; |
| } |
| |
| ++delim; |
| vol->password = kstrndup(delim, len, GFP_KERNEL); |
| if (!vol->password) { |
| cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
| len); |
| rc = -ENOMEM; |
| kfree(vol->username); |
| vol->username = NULL; |
| goto out_key_put; |
| } |
| |
| out_key_put: |
| up_read(&key->sem); |
| key_put(key); |
| out_err: |
| kfree(desc); |
| cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
| return rc; |
| } |
| #else /* ! CONFIG_KEYS */ |
| static inline int |
| cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), |
| struct cifs_ses *ses __attribute__((unused))) |
| { |
| return -ENOSYS; |
| } |
| #endif /* CONFIG_KEYS */ |
| |
| static struct cifs_ses * |
| cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
| { |
| int rc = -ENOMEM; |
| unsigned int xid; |
| struct cifs_ses *ses; |
| struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
| |
| xid = get_xid(); |
| |
| ses = cifs_find_smb_ses(server, volume_info); |
| if (ses) { |
| cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
| ses->status); |
| |
| mutex_lock(&ses->session_mutex); |
| rc = cifs_negotiate_protocol(xid, ses); |
| if (rc) { |
| mutex_unlock(&ses->session_mutex); |
| /* problem -- put our ses reference */ |
| cifs_put_smb_ses(ses); |
| free_xid(xid); |
| return ERR_PTR(rc); |
| } |
| if (ses->need_reconnect) { |
| cifs_dbg(FYI, "Session needs reconnect\n"); |
| rc = cifs_setup_session(xid, ses, |
| volume_info->local_nls); |
| if (rc) { |
| mutex_unlock(&ses->session_mutex); |
| /* problem -- put our reference */ |
| cifs_put_smb_ses(ses); |
| free_xid(xid); |
| return ERR_PTR(rc); |
| } |
| } |
| mutex_unlock(&ses->session_mutex); |
| |
| /* existing SMB ses has a server reference already */ |
| cifs_put_tcp_session(server); |
| free_xid(xid); |
| return ses; |
| } |
| |
| cifs_dbg(FYI, "Existing smb sess not found\n"); |
| ses = sesInfoAlloc(); |
| if (ses == NULL) |
| goto get_ses_fail; |
| |
| /* new SMB session uses our server ref */ |
| ses->server = server; |
| if (server->dstaddr.ss_family == AF_INET6) |
| sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); |
| else |
| sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
| |
| if (volume_info->username) { |
| ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); |
| if (!ses->user_name) |
| goto get_ses_fail; |
| } |
| |
| /* volume_info->password freed at unmount */ |
| if (volume_info->password) { |
| ses->password = kstrdup(volume_info->password, GFP_KERNEL); |
| if (!ses->password) |
| goto get_ses_fail; |
| } |
| if (volume_info->domainname) { |
| ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
| if (!ses->domainName) |
| goto get_ses_fail; |
| } |
| ses->cred_uid = volume_info->cred_uid; |
| ses->linux_uid = volume_info->linux_uid; |
| |
| ses->sectype = volume_info->sectype; |
| ses->sign = volume_info->sign; |
| |
| mutex_lock(&ses->session_mutex); |
| rc = cifs_negotiate_protocol(xid, ses); |
| if (!rc) |
| rc = cifs_setup_session(xid, ses, volume_info->local_nls); |
| mutex_unlock(&ses->session_mutex); |
| if (rc) |
| goto get_ses_fail; |
| |
| /* success, put it on the list */ |
| spin_lock(&cifs_tcp_ses_lock); |
| list_add(&ses->smb_ses_list, &server->smb_ses_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| free_xid(xid); |
| return ses; |
| |
| get_ses_fail: |
| sesInfoFree(ses); |
| free_xid(xid); |
| return ERR_PTR(rc); |
| } |
| |
| static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
| { |
| if (tcon->tidStatus == CifsExiting) |
| return 0; |
| if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) |
| return 0; |
| return 1; |
| } |
| |
| static struct cifs_tcon * |
| cifs_find_tcon(struct cifs_ses *ses, const char *unc) |
| { |
| struct list_head *tmp; |
| struct cifs_tcon *tcon; |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| list_for_each(tmp, &ses->tcon_list) { |
| tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
| if (!match_tcon(tcon, unc)) |
| continue; |
| ++tcon->tc_count; |
| spin_unlock(&cifs_tcp_ses_lock); |
| return tcon; |
| } |
| spin_unlock(&cifs_tcp_ses_lock); |
| return NULL; |
| } |
| |
| static void |
| cifs_put_tcon(struct cifs_tcon *tcon) |
| { |
| unsigned int xid; |
| struct cifs_ses *ses = tcon->ses; |
| |
| cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
| spin_lock(&cifs_tcp_ses_lock); |
| if (--tcon->tc_count > 0) { |
| spin_unlock(&cifs_tcp_ses_lock); |
| return; |
| } |
| |
| list_del_init(&tcon->tcon_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| xid = get_xid(); |
| if (ses->server->ops->tree_disconnect) |
| ses->server->ops->tree_disconnect(xid, tcon); |
| _free_xid(xid); |
| |
| cifs_fscache_release_super_cookie(tcon); |
| tconInfoFree(tcon); |
| cifs_put_smb_ses(ses); |
| } |
| |
| static struct cifs_tcon * |
| cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
| { |
| int rc, xid; |
| struct cifs_tcon *tcon; |
| |
| tcon = cifs_find_tcon(ses, volume_info->UNC); |
| if (tcon) { |
| cifs_dbg(FYI, "Found match on UNC path\n"); |
| /* existing tcon already has a reference */ |
| cifs_put_smb_ses(ses); |
| if (tcon->seal != volume_info->seal) |
| cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n"); |
| return tcon; |
| } |
| |
| if (!ses->server->ops->tree_connect) { |
| rc = -ENOSYS; |
| goto out_fail; |
| } |
| |
| tcon = tconInfoAlloc(); |
| if (tcon == NULL) { |
| rc = -ENOMEM; |
| goto out_fail; |
| } |
| |
| tcon->ses = ses; |
| if (volume_info->password) { |
| tcon->password = kstrdup(volume_info->password, GFP_KERNEL); |
| if (!tcon->password) { |
| rc = -ENOMEM; |
| goto out_fail; |
| } |
| } |
| |
| /* |
| * BB Do we need to wrap session_mutex around this TCon call and Unix |
| * SetFS as we do on SessSetup and reconnect? |
| */ |
| xid = get_xid(); |
| rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
| volume_info->local_nls); |
| free_xid(xid); |
| cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
| if (rc) |
| goto out_fail; |
| |
| if (volume_info->nodfs) { |
| tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; |
| cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
| } |
| tcon->seal = volume_info->seal; |
| tcon->use_persistent = false; |
| /* check if SMB2 or later, CIFS does not support persistent handles */ |
| if (volume_info->persistent) { |
| if (ses->server->vals->protocol_id == 0) { |
| cifs_dbg(VFS, |
| "SMB3 or later required for persistent handles\n"); |
| rc = -EOPNOTSUPP; |
| goto out_fail; |
| #ifdef CONFIG_CIFS_SMB2 |
| } else if (ses->server->capabilities & |
| SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) |
| tcon->use_persistent = true; |
| else /* persistent handles requested but not supported */ { |
| cifs_dbg(VFS, |
| "Persistent handles not supported on share\n"); |
| rc = -EOPNOTSUPP; |
| goto out_fail; |
| #endif /* CONFIG_CIFS_SMB2 */ |
| } |
| #ifdef CONFIG_CIFS_SMB2 |
| } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) |
| && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) |
| && (volume_info->nopersistent == false)) { |
| cifs_dbg(FYI, "enabling persistent handles\n"); |
| tcon->use_persistent = true; |
| #endif /* CONFIG_CIFS_SMB2 */ |
| } else if (volume_info->resilient) { |
| if (ses->server->vals->protocol_id == 0) { |
| cifs_dbg(VFS, |
| "SMB2.1 or later required for resilient handles\n"); |
| rc = -EOPNOTSUPP; |
| goto out_fail; |
| } |
| tcon->use_resilient = true; |
| } |
| |
| /* |
| * We can have only one retry value for a connection to a share so for |
| * resources mounted more than once to the same server share the last |
| * value passed in for the retry flag is used. |
| */ |
| tcon->retry = volume_info->retry; |
| tcon->nocase = volume_info->nocase; |
| tcon->local_lease = volume_info->local_lease; |
| INIT_LIST_HEAD(&tcon->pending_opens); |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| list_add(&tcon->tcon_list, &ses->tcon_list); |
| spin_unlock(&cifs_tcp_ses_lock); |
| |
| cifs_fscache_get_super_cookie(tcon); |
| |
| return tcon; |
| |
| out_fail: |
| tconInfoFree(tcon); |
| return ERR_PTR(rc); |
| } |
| |
| void |
| cifs_put_tlink(struct tcon_link *tlink) |
| { |
| if (!tlink || IS_ERR(tlink)) |
| return; |
| |
| if (!atomic_dec_and_test(&tlink->tl_count) || |
| test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { |
| tlink->tl_time = jiffies; |
| return; |
| } |
| |
| if (!IS_ERR(tlink_tcon(tlink))) |
| cifs_put_tcon(tlink_tcon(tlink)); |
| kfree(tlink); |
| return; |
| } |
| |
| static inline struct tcon_link * |
| cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
| { |
| return cifs_sb->master_tlink; |
| } |
| |
| static int |
| compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) |
| { |
| struct cifs_sb_info *old = CIFS_SB(sb); |
| struct cifs_sb_info *new = mnt_data->cifs_sb; |
| |
| if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) |
| return 0; |
| |
| if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != |
| (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) |
| return 0; |
| |
| /* |
| * We want to share sb only if we don't specify an r/wsize or |
| * specified r/wsize is greater than or equal to existing one. |
| */ |
| if (new->wsize && new->wsize < old->wsize) |
| return 0; |
| |
| if (new->rsize && new->rsize < old->rsize) |
| return 0; |
| |
| if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
| return 0; |
| |
| if (old->mnt_file_mode != new->mnt_file_mode || |
| old->mnt_dir_mode != new->mnt_dir_mode) |
| return 0; |
| |
| if (strcmp(old->local_nls->charset, new->local_nls->charset)) |
| return 0; |
| |
| if (old->actimeo != new->actimeo) |
| return 0; |
| |
| return 1; |
| } |
| |
| int |
| cifs_match_super(struct super_block *sb, void *data) |
| { |
| struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; |
| struct smb_vol *volume_info; |
| struct cifs_sb_info *cifs_sb; |
| struct TCP_Server_Info *tcp_srv; |
| struct cifs_ses *ses; |
| struct cifs_tcon *tcon; |
| struct tcon_link *tlink; |
| int rc = 0; |
| |
| spin_lock(&cifs_tcp_ses_lock); |
| cifs_sb = CIFS_SB(sb); |
| tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| if (IS_ERR(tlink)) { |
| spin_unlock(&cifs_tcp_ses_lock); |
| return rc; |
| } |
| tcon = tlink_tcon(tlink); |
| ses = tcon->ses; |
| tcp_srv = ses->server; |
| |
| volume_info = mnt_data->vol; |
| |
| if (!match_server(tcp_srv, volume_info) || |
| !match_session(ses, volume_info) || |
| !match_tcon(tcon, volume_info->UNC)) { |
| rc = 0; |
| goto out; |
| } |
| |
| rc = compare_mount_options(sb, mnt_data); |
| out: |
| spin_unlock(&cifs_tcp_ses_lock); |
| cifs_put_tlink(tlink); |
| return rc; |
| } |
| |
| int |
| get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
| const struct nls_table *nls_codepage, unsigned int *num_referrals, |
| struct dfs_info3_param **referrals, int remap) |
| { |
| char *temp_unc; |
| int rc = 0; |
| |
| if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
| return -ENOSYS; |
| |
| *num_referrals = 0; |
| *referrals = NULL; |
| |
| if (ses->ipc_tid == 0) { |
| temp_unc = kmalloc(2 /* for slashes */ + |
| strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
| + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); |
| if (temp_unc == NULL) |
| return -ENOMEM; |
| temp_unc[0] = '\\'; |
| temp_unc[1] = '\\'; |
| strcpy(temp_unc + 2, ses->serverName); |
| strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); |
| rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, |
| nls_codepage); |
| cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
| kfree(temp_unc); |
| } |
| if (rc == 0) |
| rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
| referrals, num_referrals, |
| nls_codepage, remap); |
| /* |
| * BB - map targetUNCs to dfs_info3 structures, here or in |
| * ses->server->ops->get_dfs_refer. |
| */ |
| |
| return rc; |
| } |
| |
| #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| static struct lock_class_key cifs_key[2]; |
| static struct lock_class_key cifs_slock_key[2]; |
| |
| static inline void |
| cifs_reclassify_socket4(struct socket *sock) |
| { |
| struct sock *sk = sock->sk; |
| BUG_ON(sock_owned_by_user(sk)); |
| sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
| &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); |
| } |
| |
| static inline void |
| cifs_reclassify_socket6(struct socket *sock) |
| { |
| struct sock *sk = sock->sk; |
| BUG_ON(sock_owned_by_user(sk)); |
| sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
| &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); |
| } |
| #else |
| static inline void |
| cifs_reclassify_socket4(struct socket *sock) |
| { |
| } |
| |
| static inline void |
| cifs_reclassify_socket6(struct socket *sock) |
| { |
| } |
| #endif |
| |
| /* See RFC1001 section 14 on representation of Netbios names */ |
| static void rfc1002mangle(char *target, char *source, unsigned int length) |
| { |
| unsigned int i, j; |
| |
| for (i = 0, j = 0; i < (length); i++) { |
| /* mask a nibble at a time and encode */ |
| target[j] = 'A' + (0x0F & (source[i] >> 4)); |
| target[j+1] = 'A' + (0x0F & source[i]); |
| j += 2; |
| } |
| |
| } |
| |
| static int |
| bind_socket(struct TCP_Server_Info *server) |
| { |
| int rc = 0; |
| if (server->srcaddr.ss_family != AF_UNSPEC) { |
| /* Bind to the specified local IP address */ |
| struct socket *socket = server->ssocket; |
| rc = socket->ops->bind(socket, |
| (struct sockaddr *) &server->srcaddr, |
| sizeof(server->srcaddr)); |
| if (rc < 0) { |
| struct sockaddr_in *saddr4; |
| struct sockaddr_in6 *saddr6; |
| saddr4 = (struct sockaddr_in *)&server->srcaddr; |
| saddr6 = (struct sockaddr_in6 *)&server->srcaddr; |
| if (saddr6->sin6_family == AF_INET6) |
| cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
| &saddr6->sin6_addr, rc); |
| else |
| cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
| &saddr4->sin_addr.s_addr, rc); |
| } |
| } |
| return rc; |
| } |
| |
| static int |
| ip_rfc1001_connect(struct TCP_Server_Info *server) |
| { |
| int rc = 0; |
| /* |
| * some servers require RFC1001 sessinit before sending |
| * negprot - BB check reconnection in case where second |
| * sessinit is sent but no second negprot |
| */ |
| struct rfc1002_session_packet *ses_init_buf; |
| struct smb_hdr *smb_buf; |
| ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), |
| GFP_KERNEL); |
| if (ses_init_buf) { |
| ses_init_buf->trailer.session_req.called_len = 32; |
| |
| if (server->server_RFC1001_name && |
| server->server_RFC1001_name[0] != 0) |
| rfc1002mangle(ses_init_buf->trailer. |
| session_req.called_name, |
| server->server_RFC1001_name, |
| RFC1001_NAME_LEN_WITH_NULL); |
| else |
| rfc1002mangle(ses_init_buf->trailer. |
| session_req.called_name, |
| DEFAULT_CIFS_CALLED_NAME, |
| RFC1001_NAME_LEN_WITH_NULL); |
| |
| ses_init_buf->trailer.session_req.calling_len = 32; |
| |
| /* |
| * calling name ends in null (byte 16) from old smb |
| * convention. |
| */ |
| if (server->workstation_RFC1001_name[0] != 0) |
| rfc1002mangle(ses_init_buf->trailer. |
| session_req.calling_name, |
| server->workstation_RFC1001_name, |
| RFC1001_NAME_LEN_WITH_NULL); |
| else |
| rfc1002mangle(ses_init_buf->trailer. |
| session_req.calling_name, |
| "LINUX_CIFS_CLNT", |
| RFC1001_NAME_LEN_WITH_NULL); |
| |
| ses_init_buf->trailer.session_req.scope1 = 0; |
| ses_init_buf->trailer.session_req.scope2 = 0; |
| smb_buf = (struct smb_hdr *)ses_init_buf; |
| |
| /* sizeof RFC1002_SESSION_REQUEST with no scope */ |
| smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
| rc = smb_send(server, smb_buf, 0x44); |
| kfree(ses_init_buf); |
| /* |
| * RFC1001 layer in at least one server |
| * requires very short break before negprot |
| * presumably because not expecting negprot |
| * to follow so fast. This is a simple |
| * solution that works without |
| * complicating the code and causes no |
| * significant slowing down on mount |
| * for everyone else |
| */ |
| usleep_range(1000, 2000); |
| } |
| /* |
| * else the negprot may still work without this |
| * even though malloc failed |
| */ |
| |
| return rc; |
| } |
| |
| static int |
| generic_ip_connect(struct TCP_Server_Info *server) |
| { |
| int rc = 0; |
| __be16 sport; |
| int slen, sfamily; |
| struct socket *socket = server->ssocket; |
| struct sockaddr *saddr; |
| |
| saddr = (struct sockaddr *) &server->dstaddr; |
| |
| if (server->dstaddr.ss_family == AF_INET6) { |
| sport = ((struct sockaddr_in6 *) saddr)->sin6_port; |
|