| #include <linux/ceph/ceph_debug.h> |
| |
| #include <linux/module.h> |
| #include <linux/fs.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/uaccess.h> |
| #include <linux/kernel.h> |
| #include <linux/namei.h> |
| #include <linux/writeback.h> |
| #include <linux/vmalloc.h> |
| #include <linux/pagevec.h> |
| |
| #include "super.h" |
| #include "mds_client.h" |
| #include <linux/ceph/decode.h> |
| |
| /* |
| * Ceph inode operations |
| * |
| * Implement basic inode helpers (get, alloc) and inode ops (getattr, |
| * setattr, etc.), xattr helpers, and helpers for assimilating |
| * metadata returned by the MDS into our cache. |
| * |
| * Also define helpers for doing asynchronous writeback, invalidation, |
| * and truncation for the benefit of those who can't afford to block |
| * (typically because they are in the message handler path). |
| */ |
| |
| static const struct inode_operations ceph_symlink_iops; |
| |
| static void ceph_invalidate_work(struct work_struct *work); |
| static void ceph_writeback_work(struct work_struct *work); |
| static void ceph_vmtruncate_work(struct work_struct *work); |
| |
| /* |
| * find or create an inode, given the ceph ino number |
| */ |
| struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
| { |
| struct inode *inode; |
| ino_t t = ceph_vino_to_ino(vino); |
| |
| inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); |
| if (inode == NULL) |
| return ERR_PTR(-ENOMEM); |
| if (inode->i_state & I_NEW) { |
| dout("get_inode created new inode %p %llx.%llx ino %llx\n", |
| inode, ceph_vinop(inode), (u64)inode->i_ino); |
| unlock_new_inode(inode); |
| } |
| |
| dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, |
| vino.snap, inode); |
| return inode; |
| } |
| |
| /* |
| * get/constuct snapdir inode for a given directory |
| */ |
| struct inode *ceph_get_snapdir(struct inode *parent) |
| { |
| struct ceph_vino vino = { |
| .ino = ceph_ino(parent), |
| .snap = CEPH_SNAPDIR, |
| }; |
| struct inode *inode = ceph_get_inode(parent->i_sb, vino); |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| |
| BUG_ON(!S_ISDIR(parent->i_mode)); |
| if (IS_ERR(inode)) |
| return inode; |
| inode->i_mode = parent->i_mode; |
| inode->i_uid = parent->i_uid; |
| inode->i_gid = parent->i_gid; |
| inode->i_op = &ceph_dir_iops; |
| inode->i_fop = &ceph_dir_fops; |
| ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
| ci->i_rbytes = 0; |
| return inode; |
| } |
| |
| const struct inode_operations ceph_file_iops = { |
| .permission = ceph_permission, |
| .setattr = ceph_setattr, |
| .getattr = ceph_getattr, |
| .setxattr = ceph_setxattr, |
| .getxattr = ceph_getxattr, |
| .listxattr = ceph_listxattr, |
| .removexattr = ceph_removexattr, |
| }; |
| |
| |
| /* |
| * We use a 'frag tree' to keep track of the MDS's directory fragments |
| * for a given inode (usually there is just a single fragment). We |
| * need to know when a child frag is delegated to a new MDS, or when |
| * it is flagged as replicated, so we can direct our requests |
| * accordingly. |
| */ |
| |
| /* |
| * find/create a frag in the tree |
| */ |
| static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, |
| u32 f) |
| { |
| struct rb_node **p; |
| struct rb_node *parent = NULL; |
| struct ceph_inode_frag *frag; |
| int c; |
| |
| p = &ci->i_fragtree.rb_node; |
| while (*p) { |
| parent = *p; |
| frag = rb_entry(parent, struct ceph_inode_frag, node); |
| c = ceph_frag_compare(f, frag->frag); |
| if (c < 0) |
| p = &(*p)->rb_left; |
| else if (c > 0) |
| p = &(*p)->rb_right; |
| else |
| return frag; |
| } |
| |
| frag = kmalloc(sizeof(*frag), GFP_NOFS); |
| if (!frag) { |
| pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " |
| "frag %x\n", &ci->vfs_inode, |
| ceph_vinop(&ci->vfs_inode), f); |
| return ERR_PTR(-ENOMEM); |
| } |
| frag->frag = f; |
| frag->split_by = 0; |
| frag->mds = -1; |
| frag->ndist = 0; |
| |
| rb_link_node(&frag->node, parent, p); |
| rb_insert_color(&frag->node, &ci->i_fragtree); |
| |
| dout("get_or_create_frag added %llx.%llx frag %x\n", |
| ceph_vinop(&ci->vfs_inode), f); |
| return frag; |
| } |
| |
| /* |
| * find a specific frag @f |
| */ |
| struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) |
| { |
| struct rb_node *n = ci->i_fragtree.rb_node; |
| |
| while (n) { |
| struct ceph_inode_frag *frag = |
| rb_entry(n, struct ceph_inode_frag, node); |
| int c = ceph_frag_compare(f, frag->frag); |
| if (c < 0) |
| n = n->rb_left; |
| else if (c > 0) |
| n = n->rb_right; |
| else |
| return frag; |
| } |
| return NULL; |
| } |
| |
| /* |
| * Choose frag containing the given value @v. If @pfrag is |
| * specified, copy the frag delegation info to the caller if |
| * it is present. |
| */ |
| u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
| struct ceph_inode_frag *pfrag, |
| int *found) |
| { |
| u32 t = ceph_frag_make(0, 0); |
| struct ceph_inode_frag *frag; |
| unsigned nway, i; |
| u32 n; |
| |
| if (found) |
| *found = 0; |
| |
| mutex_lock(&ci->i_fragtree_mutex); |
| while (1) { |
| WARN_ON(!ceph_frag_contains_value(t, v)); |
| frag = __ceph_find_frag(ci, t); |
| if (!frag) |
| break; /* t is a leaf */ |
| if (frag->split_by == 0) { |
| if (pfrag) |
| memcpy(pfrag, frag, sizeof(*pfrag)); |
| if (found) |
| *found = 1; |
| break; |
| } |
| |
| /* choose child */ |
| nway = 1 << frag->split_by; |
| dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, |
| frag->split_by, nway); |
| for (i = 0; i < nway; i++) { |
| n = ceph_frag_make_child(t, frag->split_by, i); |
| if (ceph_frag_contains_value(n, v)) { |
| t = n; |
| break; |
| } |
| } |
| BUG_ON(i == nway); |
| } |
| dout("choose_frag(%x) = %x\n", v, t); |
| |
| mutex_unlock(&ci->i_fragtree_mutex); |
| return t; |
| } |
| |
| /* |
| * Process dirfrag (delegation) info from the mds. Include leaf |
| * fragment in tree ONLY if ndist > 0. Otherwise, only |
| * branches/splits are included in i_fragtree) |
| */ |
| static int ceph_fill_dirfrag(struct inode *inode, |
| struct ceph_mds_reply_dirfrag *dirinfo) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| struct ceph_inode_frag *frag; |
| u32 id = le32_to_cpu(dirinfo->frag); |
| int mds = le32_to_cpu(dirinfo->auth); |
| int ndist = le32_to_cpu(dirinfo->ndist); |
| int i; |
| int err = 0; |
| |
| mutex_lock(&ci->i_fragtree_mutex); |
| if (ndist == 0) { |
| /* no delegation info needed. */ |
| frag = __ceph_find_frag(ci, id); |
| if (!frag) |
| goto out; |
| if (frag->split_by == 0) { |
| /* tree leaf, remove */ |
| dout("fill_dirfrag removed %llx.%llx frag %x" |
| " (no ref)\n", ceph_vinop(inode), id); |
| rb_erase(&frag->node, &ci->i_fragtree); |
| kfree(frag); |
| } else { |
| /* tree branch, keep and clear */ |
| dout("fill_dirfrag cleared %llx.%llx frag %x" |
| " referral\n", ceph_vinop(inode), id); |
| frag->mds = -1; |
| frag->ndist = 0; |
| } |
| goto out; |
| } |
| |
| |
| /* find/add this frag to store mds delegation info */ |
| frag = __get_or_create_frag(ci, id); |
| if (IS_ERR(frag)) { |
| /* this is not the end of the world; we can continue |
| with bad/inaccurate delegation info */ |
| pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", |
| ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| frag->mds = mds; |
| frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); |
| for (i = 0; i < frag->ndist; i++) |
| frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); |
| dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", |
| ceph_vinop(inode), frag->frag, frag->ndist); |
| |
| out: |
| mutex_unlock(&ci->i_fragtree_mutex); |
| return err; |
| } |
| |
| |
| /* |
| * initialize a newly allocated inode. |
| */ |
| struct inode *ceph_alloc_inode(struct super_block *sb) |
| { |
| struct ceph_inode_info *ci; |
| int i; |
| |
| ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); |
| if (!ci) |
| return NULL; |
| |
| dout("alloc_inode %p\n", &ci->vfs_inode); |
| |
| ci->i_version = 0; |
| ci->i_time_warp_seq = 0; |
| ci->i_ceph_flags = 0; |
| ci->i_release_count = 0; |
| ci->i_symlink = NULL; |
| |
| ci->i_fragtree = RB_ROOT; |
| mutex_init(&ci->i_fragtree_mutex); |
| |
| ci->i_xattrs.blob = NULL; |
| ci->i_xattrs.prealloc_blob = NULL; |
| ci->i_xattrs.dirty = false; |
| ci->i_xattrs.index = RB_ROOT; |
| ci->i_xattrs.count = 0; |
| ci->i_xattrs.names_size = 0; |
| ci->i_xattrs.vals_size = 0; |
| ci->i_xattrs.version = 0; |
| ci->i_xattrs.index_version = 0; |
| |
| ci->i_caps = RB_ROOT; |
| ci->i_auth_cap = NULL; |
| ci->i_dirty_caps = 0; |
| ci->i_flushing_caps = 0; |
| INIT_LIST_HEAD(&ci->i_dirty_item); |
| INIT_LIST_HEAD(&ci->i_flushing_item); |
| ci->i_cap_flush_seq = 0; |
| ci->i_cap_flush_last_tid = 0; |
| memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); |
| init_waitqueue_head(&ci->i_cap_wq); |
| ci->i_hold_caps_min = 0; |
| ci->i_hold_caps_max = 0; |
| INIT_LIST_HEAD(&ci->i_cap_delay_list); |
| ci->i_cap_exporting_mds = 0; |
| ci->i_cap_exporting_mseq = 0; |
| ci->i_cap_exporting_issued = 0; |
| INIT_LIST_HEAD(&ci->i_cap_snaps); |
| ci->i_head_snapc = NULL; |
| ci->i_snap_caps = 0; |
| |
| for (i = 0; i < CEPH_FILE_MODE_NUM; i++) |
| ci->i_nr_by_mode[i] = 0; |
| |
| ci->i_truncate_seq = 0; |
| ci->i_truncate_size = 0; |
| ci->i_truncate_pending = 0; |
| |
| ci->i_max_size = 0; |
| ci->i_reported_size = 0; |
| ci->i_wanted_max_size = 0; |
| ci->i_requested_max_size = 0; |
| |
| ci->i_pin_ref = 0; |
| ci->i_rd_ref = 0; |
| ci->i_rdcache_ref = 0; |
| ci->i_wr_ref = 0; |
| ci->i_wrbuffer_ref = 0; |
| ci->i_wrbuffer_ref_head = 0; |
| ci->i_shared_gen = 0; |
| ci->i_rdcache_gen = 0; |
| ci->i_rdcache_revoking = 0; |
| |
| INIT_LIST_HEAD(&ci->i_unsafe_writes); |
| INIT_LIST_HEAD(&ci->i_unsafe_dirops); |
| spin_lock_init(&ci->i_unsafe_lock); |
| |
| ci->i_snap_realm = NULL; |
| INIT_LIST_HEAD(&ci->i_snap_realm_item); |
| INIT_LIST_HEAD(&ci->i_snap_flush_item); |
| |
| INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
| INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); |
| |
| INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); |
| |
| return &ci->vfs_inode; |
| } |
| |
| static void ceph_i_callback(struct rcu_head *head) |
| { |
| struct inode *inode = container_of(head, struct inode, i_rcu); |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| |
| INIT_LIST_HEAD(&inode->i_dentry); |
| kmem_cache_free(ceph_inode_cachep, ci); |
| } |
| |
| void ceph_destroy_inode(struct inode *inode) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| struct ceph_inode_frag *frag; |
| struct rb_node *n; |
| |
| dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); |
| |
| ceph_queue_caps_release(inode); |
| |
| /* |
| * we may still have a snap_realm reference if there are stray |
| * caps in i_cap_exporting_issued or i_snap_caps. |
| */ |
| if (ci->i_snap_realm) { |
| struct ceph_mds_client *mdsc = |
| ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
| struct ceph_snap_realm *realm = ci->i_snap_realm; |
| |
| dout(" dropping residual ref to snap realm %p\n", realm); |
| spin_lock(&realm->inodes_with_caps_lock); |
| list_del_init(&ci->i_snap_realm_item); |
| spin_unlock(&realm->inodes_with_caps_lock); |
| ceph_put_snap_realm(mdsc, realm); |
| } |
| |
| kfree(ci->i_symlink); |
| while ((n = rb_first(&ci->i_fragtree)) != NULL) { |
| frag = rb_entry(n, struct ceph_inode_frag, node); |
| rb_erase(n, &ci->i_fragtree); |
| kfree(frag); |
| } |
| |
| __ceph_destroy_xattrs(ci); |
| if (ci->i_xattrs.blob) |
| ceph_buffer_put(ci->i_xattrs.blob); |
| if (ci->i_xattrs.prealloc_blob) |
| ceph_buffer_put(ci->i_xattrs.prealloc_blob); |
| |
| call_rcu(&inode->i_rcu, ceph_i_callback); |
| } |
| |
| |
| /* |
| * Helpers to fill in size, ctime, mtime, and atime. We have to be |
| * careful because either the client or MDS may have more up to date |
| * info, depending on which capabilities are held, and whether |
| * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime |
| * and size are monotonically increasing, except when utimes() or |
| * truncate() increments the corresponding _seq values.) |
| */ |
| int ceph_fill_file_size(struct inode *inode, int issued, |
| u32 truncate_seq, u64 truncate_size, u64 size) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| int queue_trunc = 0; |
| |
| if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || |
| (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { |
| dout("size %lld -> %llu\n", inode->i_size, size); |
| inode->i_size = size; |
| inode->i_blocks = (size + (1<<9) - 1) >> 9; |
| ci->i_reported_size = size; |
| if (truncate_seq != ci->i_truncate_seq) { |
| dout("truncate_seq %u -> %u\n", |
| ci->i_truncate_seq, truncate_seq); |
| ci->i_truncate_seq = truncate_seq; |
| /* |
| * If we hold relevant caps, or in the case where we're |
| * not the only client referencing this file and we |
| * don't hold those caps, then we need to check whether |
| * the file is either opened or mmaped |
| */ |
| if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| |
| CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| |
| CEPH_CAP_FILE_EXCL| |
| CEPH_CAP_FILE_LAZYIO)) || |
| mapping_mapped(inode->i_mapping) || |
| __ceph_caps_file_wanted(ci)) { |
| ci->i_truncate_pending++; |
| queue_trunc = 1; |
| } |
| } |
| } |
| if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && |
| ci->i_truncate_size != truncate_size) { |
| dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, |
| truncate_size); |
| ci->i_truncate_size = truncate_size; |
| } |
| return queue_trunc; |
| } |
| |
| void ceph_fill_file_time(struct inode *inode, int issued, |
| u64 time_warp_seq, struct timespec *ctime, |
| struct timespec *mtime, struct timespec *atime) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| int warn = 0; |
| |
| if (issued & (CEPH_CAP_FILE_EXCL| |
| CEPH_CAP_FILE_WR| |
| CEPH_CAP_FILE_BUFFER| |
| CEPH_CAP_AUTH_EXCL| |
| CEPH_CAP_XATTR_EXCL)) { |
| if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
| dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", |
| inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, |
| ctime->tv_sec, ctime->tv_nsec); |
| inode->i_ctime = *ctime; |
| } |
| if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { |
| /* the MDS did a utimes() */ |
| dout("mtime %ld.%09ld -> %ld.%09ld " |
| "tw %d -> %d\n", |
| inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, |
| mtime->tv_sec, mtime->tv_nsec, |
| ci->i_time_warp_seq, (int)time_warp_seq); |
| |
| inode->i_mtime = *mtime; |
| inode->i_atime = *atime; |
| ci->i_time_warp_seq = time_warp_seq; |
| } else if (time_warp_seq == ci->i_time_warp_seq) { |
| /* nobody did utimes(); take the max */ |
| if (timespec_compare(mtime, &inode->i_mtime) > 0) { |
| dout("mtime %ld.%09ld -> %ld.%09ld inc\n", |
| inode->i_mtime.tv_sec, |
| inode->i_mtime.tv_nsec, |
| mtime->tv_sec, mtime->tv_nsec); |
| inode->i_mtime = *mtime; |
| } |
| if (timespec_compare(atime, &inode->i_atime) > 0) { |
| dout("atime %ld.%09ld -> %ld.%09ld inc\n", |
| inode->i_atime.tv_sec, |
| inode->i_atime.tv_nsec, |
| atime->tv_sec, atime->tv_nsec); |
| inode->i_atime = *atime; |
| } |
| } else if (issued & CEPH_CAP_FILE_EXCL) { |
| /* we did a utimes(); ignore mds values */ |
| } else { |
| warn = 1; |
| } |
| } else { |
| /* we have no write|excl caps; whatever the MDS says is true */ |
| if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
| inode->i_ctime = *ctime; |
| inode->i_mtime = *mtime; |
| inode->i_atime = *atime; |
| ci->i_time_warp_seq = time_warp_seq; |
| } else { |
| warn = 1; |
| } |
| } |
| if (warn) /* time_warp_seq shouldn't go backwards */ |
| dout("%p mds time_warp_seq %llu < %u\n", |
| inode, time_warp_seq, ci->i_time_warp_seq); |
| } |
| |
| /* |
| * Populate an inode based on info from mds. May be called on new or |
| * existing inodes. |
| */ |
| static int fill_inode(struct inode *inode, |
| struct ceph_mds_reply_info_in *iinfo, |
| struct ceph_mds_reply_dirfrag *dirinfo, |
| struct ceph_mds_session *session, |
| unsigned long ttl_from, int cap_fmode, |
| struct ceph_cap_reservation *caps_reservation) |
| { |
| struct ceph_mds_reply_inode *info = iinfo->in; |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| int i; |
| int issued, implemented; |
| struct timespec mtime, atime, ctime; |
| u32 nsplits; |
| struct ceph_buffer *xattr_blob = NULL; |
| int err = 0; |
| int queue_trunc = 0; |
| |
| dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", |
| inode, ceph_vinop(inode), le64_to_cpu(info->version), |
| ci->i_version); |
| |
| /* |
| * prealloc xattr data, if it looks like we'll need it. only |
| * if len > 4 (meaning there are actually xattrs; the first 4 |
| * bytes are the xattr count). |
| */ |
| if (iinfo->xattr_len > 4) { |
| xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
| if (!xattr_blob) |
| pr_err("fill_inode ENOMEM xattr blob %d bytes\n", |
| iinfo->xattr_len); |
| } |
| |
| spin_lock(&inode->i_lock); |
| |
| /* |
| * provided version will be odd if inode value is projected, |
| * even if stable. skip the update if we have newer stable |
| * info (ours>=theirs, e.g. due to racing mds replies), unless |
| * we are getting projected (unstable) info (in which case the |
| * version is odd, and we want ours>theirs). |
| * us them |
| * 2 2 skip |
| * 3 2 skip |
| * 3 3 update |
| */ |
| if (le64_to_cpu(info->version) > 0 && |
| (ci->i_version & ~1) >= le64_to_cpu(info->version)) |
| goto no_change; |
| |
| issued = __ceph_caps_issued(ci, &implemented); |
| issued |= implemented | __ceph_caps_dirty(ci); |
| |
| /* update inode */ |
| ci->i_version = le64_to_cpu(info->version); |
| inode->i_version++; |
| inode->i_rdev = le32_to_cpu(info->rdev); |
| |
| if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { |
| inode->i_mode = le32_to_cpu(info->mode); |
| inode->i_uid = le32_to_cpu(info->uid); |
| inode->i_gid = le32_to_cpu(info->gid); |
| dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
| inode->i_uid, inode->i_gid); |
| } |
| |
| if ((issued & CEPH_CAP_LINK_EXCL) == 0) |
| inode->i_nlink = le32_to_cpu(info->nlink); |
| |
| /* be careful with mtime, atime, size */ |
| ceph_decode_timespec(&atime, &info->atime); |
| ceph_decode_timespec(&mtime, &info->mtime); |
| ceph_decode_timespec(&ctime, &info->ctime); |
| queue_trunc = ceph_fill_file_size(inode, issued, |
| le32_to_cpu(info->truncate_seq), |
| le64_to_cpu(info->truncate_size), |
| le64_to_cpu(info->size)); |
| ceph_fill_file_time(inode, issued, |
| le32_to_cpu(info->time_warp_seq), |
| &ctime, &mtime, &atime); |
| |
| /* only update max_size on auth cap */ |
| if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && |
| ci->i_max_size != le64_to_cpu(info->max_size)) { |
| dout("max_size %lld -> %llu\n", ci->i_max_size, |
| le64_to_cpu(info->max_size)); |
| ci->i_max_size = le64_to_cpu(info->max_size); |
| } |
| |
| ci->i_layout = info->layout; |
| inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; |
| |
| /* xattrs */ |
| /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ |
| if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && |
| le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { |
| if (ci->i_xattrs.blob) |
| ceph_buffer_put(ci->i_xattrs.blob); |
| ci->i_xattrs.blob = xattr_blob; |
| if (xattr_blob) |
| memcpy(ci->i_xattrs.blob->vec.iov_base, |
| iinfo->xattr_data, iinfo->xattr_len); |
| ci->i_xattrs.version = le64_to_cpu(info->xattr_version); |
| xattr_blob = NULL; |
| } |
| |
| inode->i_mapping->a_ops = &ceph_aops; |
| inode->i_mapping->backing_dev_info = |
| &ceph_sb_to_client(inode->i_sb)->backing_dev_info; |
| |
| switch (inode->i_mode & S_IFMT) { |
| case S_IFIFO: |
| case S_IFBLK: |
| case S_IFCHR: |
| case S_IFSOCK: |
| init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| inode->i_op = &ceph_file_iops; |
| break; |
| case S_IFREG: |
| inode->i_op = &ceph_file_iops; |
| inode->i_fop = &ceph_file_fops; |
| break; |
| case S_IFLNK: |
| inode->i_op = &ceph_symlink_iops; |
| if (!ci->i_symlink) { |
| int symlen = iinfo->symlink_len; |
| char *sym; |
| |
| BUG_ON(symlen != inode->i_size); |
| spin_unlock(&inode->i_lock); |
| |
| err = -ENOMEM; |
| sym = kmalloc(symlen+1, GFP_NOFS); |
| if (!sym) |
| goto out; |
| memcpy(sym, iinfo->symlink, symlen); |
| sym[symlen] = 0; |
| |
| spin_lock(&inode->i_lock); |
| if (!ci->i_symlink) |
| ci->i_symlink = sym; |
| else |
| kfree(sym); /* lost a race */ |
| } |
| break; |
| case S_IFDIR: |
| inode->i_op = &ceph_dir_iops; |
| inode->i_fop = &ceph_dir_fops; |
| |
| ci->i_files = le64_to_cpu(info->files); |
| ci->i_subdirs = le64_to_cpu(info->subdirs); |
| ci->i_rbytes = le64_to_cpu(info->rbytes); |
| ci->i_rfiles = le64_to_cpu(info->rfiles); |
| ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); |
| ceph_decode_timespec(&ci->i_rctime, &info->rctime); |
| |
| /* set dir completion flag? */ |
| if (ci->i_files == 0 && ci->i_subdirs == 0 && |
| ceph_snap(inode) == CEPH_NOSNAP && |
| (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && |
| (issued & CEPH_CAP_FILE_EXCL) == 0 && |
| (ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) { |
| dout(" marking %p complete (empty)\n", inode); |
| ci->i_ceph_flags |= CEPH_I_COMPLETE; |
| ci->i_max_offset = 2; |
| } |
| |
| /* it may be better to set st_size in getattr instead? */ |
| if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), RBYTES)) |
| inode->i_size = ci->i_rbytes; |
| break; |
| default: |
| pr_err("fill_inode %llx.%llx BAD mode 0%o\n", |
| ceph_vinop(inode), inode->i_mode); |
| } |
| |
| no_change: |
| spin_unlock(&inode->i_lock); |
| |
| /* queue truncate if we saw i_size decrease */ |
| if (queue_trunc) |
| ceph_queue_vmtruncate(inode); |
| |
| /* populate frag tree */ |
| /* FIXME: move me up, if/when version reflects fragtree changes */ |
| nsplits = le32_to_cpu(info->fragtree.nsplits); |
| mutex_lock(&ci->i_fragtree_mutex); |
| for (i = 0; i < nsplits; i++) { |
| u32 id = le32_to_cpu(info->fragtree.splits[i].frag); |
| struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); |
| |
| if (IS_ERR(frag)) |
| continue; |
| frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); |
| dout(" frag %x split by %d\n", frag->frag, frag->split_by); |
| } |
| mutex_unlock(&ci->i_fragtree_mutex); |
| |
| /* were we issued a capability? */ |
| if (info->cap.caps) { |
| if (ceph_snap(inode) == CEPH_NOSNAP) { |
| ceph_add_cap(inode, session, |
| le64_to_cpu(info->cap.cap_id), |
| cap_fmode, |
| le32_to_cpu(info->cap.caps), |
| le32_to_cpu(info->cap.wanted), |
| le32_to_cpu(info->cap.seq), |
| le32_to_cpu(info->cap.mseq), |
| le64_to_cpu(info->cap.realm), |
| info->cap.flags, |
| caps_reservation); |
| } else { |
| spin_lock(&inode->i_lock); |
| dout(" %p got snap_caps %s\n", inode, |
| ceph_cap_string(le32_to_cpu(info->cap.caps))); |
| ci->i_snap_caps |= le32_to_cpu(info->cap.caps); |
| if (cap_fmode >= 0) |
| __ceph_get_fmode(ci, cap_fmode); |
| spin_unlock(&inode->i_lock); |
| } |
| } else if (cap_fmode >= 0) { |
| pr_warning("mds issued no caps on %llx.%llx\n", |
| ceph_vinop(inode)); |
| __ceph_get_fmode(ci, cap_fmode); |
| } |
| |
| /* update delegation info? */ |
| if (dirinfo) |
| ceph_fill_dirfrag(inode, dirinfo); |
| |
| err = 0; |
| |
| out: |
| if (xattr_blob) |
| ceph_buffer_put(xattr_blob); |
| return err; |
| } |
| |
| /* |
| * caller should hold session s_mutex. |
| */ |
| static void update_dentry_lease(struct dentry *dentry, |
| struct ceph_mds_reply_lease *lease, |
| struct ceph_mds_session *session, |
| unsigned long from_time) |
| { |
| struct ceph_dentry_info *di = ceph_dentry(dentry); |
| long unsigned duration = le32_to_cpu(lease->duration_ms); |
| long unsigned ttl = from_time + (duration * HZ) / 1000; |
| long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; |
| struct inode *dir; |
| |
| /* only track leases on regular dentries */ |
| if (dentry->d_op != &ceph_dentry_ops) |
| return; |
| |
| spin_lock(&dentry->d_lock); |
| dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n", |
| dentry, le16_to_cpu(lease->mask), duration, ttl); |
| |
| /* make lease_rdcache_gen match directory */ |
| dir = dentry->d_parent->d_inode; |
| di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; |
| |
| if (lease->mask == 0) |
| goto out_unlock; |
| |
| if (di->lease_gen == session->s_cap_gen && |
| time_before(ttl, dentry->d_time)) |
| goto out_unlock; /* we already have a newer lease. */ |
| |
| if (di->lease_session && di->lease_session != session) |
| goto out_unlock; |
| |
| ceph_dentry_lru_touch(dentry); |
| |
| if (!di->lease_session) |
| di->lease_session = ceph_get_mds_session(session); |
| di->lease_gen = session->s_cap_gen; |
| di->lease_seq = le32_to_cpu(lease->seq); |
| di->lease_renew_after = half_ttl; |
| di->lease_renew_from = 0; |
| dentry->d_time = ttl; |
| out_unlock: |
| spin_unlock(&dentry->d_lock); |
| return; |
| } |
| |
| /* |
| * Set dentry's directory position based on the current dir's max, and |
| * order it in d_subdirs, so that dcache_readdir behaves. |
| */ |
| static void ceph_set_dentry_offset(struct dentry *dn) |
| { |
| struct dentry *dir = dn->d_parent; |
| struct inode *inode = dn->d_parent->d_inode; |
| struct ceph_dentry_info *di; |
| |
| BUG_ON(!inode); |
| |
| di = ceph_dentry(dn); |
| |
| spin_lock(&inode->i_lock); |
| if ((ceph_inode(inode)->i_ceph_flags & CEPH_I_COMPLETE) == 0) { |
| spin_unlock(&inode->i_lock); |
| return; |
| } |
| di->offset = ceph_inode(inode)->i_max_offset++; |
| spin_unlock(&inode->i_lock); |
| |
| spin_lock(&dir->d_lock); |
| spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); |
| list_move(&dn->d_u.d_child, &dir->d_subdirs); |
| dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, |
| dn->d_u.d_child.prev, dn->d_u.d_child.next); |
| spin_unlock(&dn->d_lock); |
| spin_unlock(&dir->d_lock); |
| } |
| |
| /* |
| * splice a dentry to an inode. |
| * caller must hold directory i_mutex for this to be safe. |
| * |
| * we will only rehash the resulting dentry if @prehash is |
| * true; @prehash will be set to false (for the benefit of |
| * the caller) if we fail. |
| */ |
| static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, |
| bool *prehash, bool set_offset) |
| { |
| struct dentry *realdn; |
| |
| BUG_ON(dn->d_inode); |
| |
| /* dn must be unhashed */ |
| if (!d_unhashed(dn)) |
| d_drop(dn); |
| realdn = d_materialise_unique(dn, in); |
| if (IS_ERR(realdn)) { |
| pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
| PTR_ERR(realdn), dn, in, ceph_vinop(in)); |
| if (prehash) |
| *prehash = false; /* don't rehash on error */ |
| dn = realdn; /* note realdn contains the error */ |
| goto out; |
| } else if (realdn) { |
| dout("dn %p (%d) spliced with %p (%d) " |
| "inode %p ino %llx.%llx\n", |
| dn, dn->d_count, |
| realdn, realdn->d_count, |
| realdn->d_inode, ceph_vinop(realdn->d_inode)); |
| dput(dn); |
| dn = realdn; |
| } else { |
| BUG_ON(!ceph_dentry(dn)); |
| dout("dn %p attached to %p ino %llx.%llx\n", |
| dn, dn->d_inode, ceph_vinop(dn->d_inode)); |
| } |
| if ((!prehash || *prehash) && d_unhashed(dn)) |
| d_rehash(dn); |
| if (set_offset) |
| ceph_set_dentry_offset(dn); |
| out: |
| return dn; |
| } |
| |
| /* |
| * Incorporate results into the local cache. This is either just |
| * one inode, or a directory, dentry, and possibly linked-to inode (e.g., |
| * after a lookup). |
| * |
| * A reply may contain |
| * a directory inode along with a dentry. |
| * and/or a target inode |
| * |
| * Called with snap_rwsem (read). |
| */ |
| int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, |
| struct ceph_mds_session *session) |
| { |
| struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
| struct inode *in = NULL; |
| struct ceph_mds_reply_inode *ininfo; |
| struct ceph_vino vino; |
| struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
| int i = 0; |
| int err = 0; |
| |
| dout("fill_trace %p is_dentry %d is_target %d\n", req, |
| rinfo->head->is_dentry, rinfo->head->is_target); |
| |
| #if 0 |
| /* |
| * Debugging hook: |
| * |
| * If we resend completed ops to a recovering mds, we get no |
| * trace. Since that is very rare, pretend this is the case |
| * to ensure the 'no trace' handlers in the callers behave. |
| * |
| * Fill in inodes unconditionally to avoid breaking cap |
| * invariants. |
| */ |
| if (rinfo->head->op & CEPH_MDS_OP_WRITE) { |
| pr_info("fill_trace faking empty trace on %lld %s\n", |
| req->r_tid, ceph_mds_op_name(rinfo->head->op)); |
| if (rinfo->head->is_dentry) { |
| rinfo->head->is_dentry = 0; |
| err = fill_inode(req->r_locked_dir, |
| &rinfo->diri, rinfo->dirfrag, |
| session, req->r_request_started, -1); |
| } |
| if (rinfo->head->is_target) { |
| rinfo->head->is_target = 0; |
| ininfo = rinfo->targeti.in; |
| vino.ino = le64_to_cpu(ininfo->ino); |
| vino.snap = le64_to_cpu(ininfo->snapid); |
| in = ceph_get_inode(sb, vino); |
| err = fill_inode(in, &rinfo->targeti, NULL, |
| session, req->r_request_started, |
| req->r_fmode); |
| iput(in); |
| } |
| } |
| #endif |
| |
| if (!rinfo->head->is_target && !rinfo->head->is_dentry) { |
| dout("fill_trace reply is empty!\n"); |
| if (rinfo->head->result == 0 && req->r_locked_dir) |
| ceph_invalidate_dir_request(req); |
| return 0; |
| } |
| |
| if (rinfo->head->is_dentry) { |
| struct inode *dir = req->r_locked_dir; |
| |
| err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, |
| session, req->r_request_started, -1, |
| &req->r_caps_reservation); |
| if (err < 0) |
| return err; |
| } |
| |
| /* |
| * ignore null lease/binding on snapdir ENOENT, or else we |
| * will have trouble splicing in the virtual snapdir later |
| */ |
| if (rinfo->head->is_dentry && !req->r_aborted && |
| (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, |
| fsc->mount_options->snapdir_name, |
| req->r_dentry->d_name.len))) { |
| /* |
| * lookup link rename : null -> possibly existing inode |
| * mknod symlink mkdir : null -> new inode |
| * unlink : linked -> null |
| */ |
| struct inode *dir = req->r_locked_dir; |
| struct dentry *dn = req->r_dentry; |
| bool have_dir_cap, have_lease; |
| |
| BUG_ON(!dn); |
| BUG_ON(!dir); |
| BUG_ON(dn->d_parent->d_inode != dir); |
| BUG_ON(ceph_ino(dir) != |
| le64_to_cpu(rinfo->diri.in->ino)); |
| BUG_ON(ceph_snap(dir) != |
| le64_to_cpu(rinfo->diri.in->snapid)); |
| |
| /* do we have a lease on the whole dir? */ |
| have_dir_cap = |
| (le32_to_cpu(rinfo->diri.in->cap.caps) & |
| CEPH_CAP_FILE_SHARED); |
| |
| /* do we have a dn lease? */ |
| have_lease = have_dir_cap || |
| (le16_to_cpu(rinfo->dlease->mask) & |
| CEPH_LOCK_DN); |
| |
| if (!have_lease) |
| dout("fill_trace no dentry lease or dir cap\n"); |
| |
| /* rename? */ |
| if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { |
| dout(" src %p '%.*s' dst %p '%.*s'\n", |
| req->r_old_dentry, |
| req->r_old_dentry->d_name.len, |
| req->r_old_dentry->d_name.name, |
| dn, dn->d_name.len, dn->d_name.name); |
| dout("fill_trace doing d_move %p -> %p\n", |
| req->r_old_dentry, dn); |
| |
| /* d_move screws up d_subdirs order */ |
| ceph_i_clear(dir, CEPH_I_COMPLETE); |
| |
| d_move(req->r_old_dentry, dn); |
| dout(" src %p '%.*s' dst %p '%.*s'\n", |
| req->r_old_dentry, |
| req->r_old_dentry->d_name.len, |
| req->r_old_dentry->d_name.name, |
| dn, dn->d_name.len, dn->d_name.name); |
| |
| /* ensure target dentry is invalidated, despite |
| rehashing bug in vfs_rename_dir */ |
| ceph_invalidate_dentry_lease(dn); |
| |
| /* take overwritten dentry's readdir offset */ |
| dout("dn %p gets %p offset %lld (old offset %lld)\n", |
| req->r_old_dentry, dn, ceph_dentry(dn)->offset, |
| ceph_dentry(req->r_old_dentry)->offset); |
| ceph_dentry(req->r_old_dentry)->offset = |
| ceph_dentry(dn)->offset; |
| |
| dn = req->r_old_dentry; /* use old_dentry */ |
| in = dn->d_inode; |
| } |
| |
| /* null dentry? */ |
| if (!rinfo->head->is_target) { |
| dout("fill_trace null dentry\n"); |
| if (dn->d_inode) { |
| dout("d_delete %p\n", dn); |
| d_delete(dn); |
| } else { |
| dout("d_instantiate %p NULL\n", dn); |
| d_instantiate(dn, NULL); |
| if (have_lease && d_unhashed(dn)) |
| d_rehash(dn); |
| update_dentry_lease(dn, rinfo->dlease, |
| session, |
| req->r_request_started); |
| } |
| goto done; |
| } |
| |
| /* attach proper inode */ |
| ininfo = rinfo->targeti.in; |
| vino.ino = le64_to_cpu(ininfo->ino); |
| vino.snap = le64_to_cpu(ininfo->snapid); |
| in = dn->d_inode; |
| if (!in) { |
| in = ceph_get_inode(sb, vino); |
| if (IS_ERR(in)) { |
| pr_err("fill_trace bad get_inode " |
| "%llx.%llx\n", vino.ino, vino.snap); |
| err = PTR_ERR(in); |
| d_delete(dn); |
| goto done; |
| } |
| dn = splice_dentry(dn, in, &have_lease, true); |
| if (IS_ERR(dn)) { |
| err = PTR_ERR(dn); |
| goto done; |
| } |
| req->r_dentry = dn; /* may have spliced */ |
| igrab(in); |
| } else if (ceph_ino(in) == vino.ino && |
| ceph_snap(in) == vino.snap) { |
| igrab(in); |
| } else { |
| dout(" %p links to %p %llx.%llx, not %llx.%llx\n", |
| dn, in, ceph_ino(in), ceph_snap(in), |
| vino.ino, vino.snap); |
| have_lease = false; |
| in = NULL; |
| } |
| |
| if (have_lease) |
| update_dentry_lease(dn, rinfo->dlease, session, |
| req->r_request_started); |
| dout(" final dn %p\n", dn); |
| i++; |
| } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || |
| req->r_op == CEPH_MDS_OP_MKSNAP) { |
| struct dentry *dn = req->r_dentry; |
| |
| /* fill out a snapdir LOOKUPSNAP dentry */ |
| BUG_ON(!dn); |
| BUG_ON(!req->r_locked_dir); |
| BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); |
| ininfo = rinfo->targeti.in; |
| vino.ino = le64_to_cpu(ininfo->ino); |
| vino.snap = le64_to_cpu(ininfo->snapid); |
| in = ceph_get_inode(sb, vino); |
| if (IS_ERR(in)) { |
| pr_err("fill_inode get_inode badness %llx.%llx\n", |
| vino.ino, vino.snap); |
| err = PTR_ERR(in); |
| d_delete(dn); |
| goto done; |
| } |
| dout(" linking snapped dir %p to dn %p\n", in, dn); |
| dn = splice_dentry(dn, in, NULL, true); |
| if (IS_ERR(dn)) { |
| err = PTR_ERR(dn); |
| goto done; |
| } |
| req->r_dentry = dn; /* may have spliced */ |
| igrab(in); |
| rinfo->head->is_dentry = 1; /* fool notrace handlers */ |
| } |
| |
| if (rinfo->head->is_target) { |
| vino.ino = le64_to_cpu(rinfo->targeti.in->ino); |
| vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); |
| |
| if (in == NULL || ceph_ino(in) != vino.ino || |
| ceph_snap(in) != vino.snap) { |
| in = ceph_get_inode(sb, vino); |
| if (IS_ERR(in)) { |
| err = PTR_ERR(in); |
| goto done; |
| } |
| } |
| req->r_target_inode = in; |
| |
| err = fill_inode(in, |
| &rinfo->targeti, NULL, |
| session, req->r_request_started, |
| (le32_to_cpu(rinfo->head->result) == 0) ? |
| req->r_fmode : -1, |
| &req->r_caps_reservation); |
| if (err < 0) { |
| pr_err("fill_inode badness %p %llx.%llx\n", |
| in, ceph_vinop(in)); |
| goto done; |
| } |
| } |
| |
| done: |
| dout("fill_trace done err=%d\n", err); |
| return err; |
| } |
| |
| /* |
| * Prepopulate our cache with readdir results, leases, etc. |
| */ |
| int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
| struct ceph_mds_session *session) |
| { |
| struct dentry *parent = req->r_dentry; |
| struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
| struct qstr dname; |
| struct dentry *dn; |
| struct inode *in; |
| int err = 0, i; |
| struct inode *snapdir = NULL; |
| struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; |
| u64 frag = le32_to_cpu(rhead->args.readdir.frag); |
| struct ceph_dentry_info *di; |
| |
| if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { |
| snapdir = ceph_get_snapdir(parent->d_inode); |
| parent = d_find_alias(snapdir); |
| dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", |
| rinfo->dir_nr, parent); |
| } else { |
| dout("readdir_prepopulate %d items under dn %p\n", |
| rinfo->dir_nr, parent); |
| if (rinfo->dir_dir) |
| ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); |
| } |
| |
| for (i = 0; i < rinfo->dir_nr; i++) { |
| struct ceph_vino vino; |
| |
| dname.name = rinfo->dir_dname[i]; |
| dname.len = rinfo->dir_dname_len[i]; |
| dname.hash = full_name_hash(dname.name, dname.len); |
| |
| vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); |
| vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); |
| |
| retry_lookup: |
| dn = d_lookup(parent, &dname); |
| dout("d_lookup on parent=%p name=%.*s got %p\n", |
| parent, dname.len, dname.name, dn); |
| |
| if (!dn) { |
| dn = d_alloc(parent, &dname); |
| dout("d_alloc %p '%.*s' = %p\n", parent, |
| dname.len, dname.name, dn); |
| if (dn == NULL) { |
| dout("d_alloc badness\n"); |
| err = -ENOMEM; |
| goto out; |
| } |
| err = ceph_init_dentry(dn); |
| if (err < 0) { |
| dput(dn); |
| goto out; |
| } |
| } else if (dn->d_inode && |
| (ceph_ino(dn->d_inode) != vino.ino || |
| ceph_snap(dn->d_inode) != vino.snap)) { |
| dout(" dn %p points to wrong inode %p\n", |
| dn, dn->d_inode); |
| d_delete(dn); |
| dput(dn); |
| goto retry_lookup; |
| } else { |
| /* reorder parent's d_subdirs */ |
| spin_lock(&parent->d_lock); |
| spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); |
| list_move(&dn->d_u.d_child, &parent->d_subdirs); |
| spin_unlock(&dn->d_lock); |
| spin_unlock(&parent->d_lock); |
| } |
| |
| di = dn->d_fsdata; |
| di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); |
| |
| /* inode */ |
| if (dn->d_inode) { |
| in = dn->d_inode; |
| } else { |
| in = ceph_get_inode(parent->d_sb, vino); |
| if (IS_ERR(in)) { |
| dout("new_inode badness\n"); |
| d_delete(dn); |
| dput(dn); |
| err = PTR_ERR(in); |
| goto out; |
| } |
| dn = splice_dentry(dn, in, NULL, false); |
| if (IS_ERR(dn)) |
| dn = NULL; |
| } |
| |
| if (fill_inode(in, &rinfo->dir_in[i], NULL, session, |
| req->r_request_started, -1, |
| &req->r_caps_reservation) < 0) { |
| pr_err("fill_inode badness on %p\n", in); |
| goto next_item; |
| } |
| if (dn) |
| update_dentry_lease(dn, rinfo->dir_dlease[i], |
| req->r_session, |
| req->r_request_started); |
| next_item: |
| if (dn) |
| dput(dn); |
| } |
| req->r_did_prepopulate = true; |
| |
| out: |
| if (snapdir) { |
| iput(snapdir); |
| dput(parent); |
| } |
| dout("readdir_prepopulate done\n"); |
| return err; |
| } |
| |
| int ceph_inode_set_size(struct inode *inode, loff_t size) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| int ret = 0; |
| |
| spin_lock(&inode->i_lock); |
| dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); |
| inode->i_size = size; |
| inode->i_blocks = (size + (1 << 9) - 1) >> 9; |
| |
| /* tell the MDS if we are approaching max_size */ |
| if ((size << 1) >= ci->i_max_size && |
| (ci->i_reported_size << 1) < ci->i_max_size) |
| ret = 1; |
| |
| spin_unlock(&inode->i_lock); |
| return ret; |
| } |
| |
| /* |
| * Write back inode data in a worker thread. (This can't be done |
| * in the message handler context.) |
| */ |
| void ceph_queue_writeback(struct inode *inode) |
| { |
| if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
| &ceph_inode(inode)->i_wb_work)) { |
| dout("ceph_queue_writeback %p\n", inode); |
| igrab(inode); |
| } else { |
| dout("ceph_queue_writeback %p failed\n", inode); |
| } |
| } |
| |
| static void ceph_writeback_work(struct work_struct *work) |
| { |
| struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| i_wb_work); |
| struct inode *inode = &ci->vfs_inode; |
| |
| dout("writeback %p\n", inode); |
| filemap_fdatawrite(&inode->i_data); |
| iput(inode); |
| } |
| |
| /* |
| * queue an async invalidation |
| */ |
| void ceph_queue_invalidate(struct inode *inode) |
| { |
| if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
| &ceph_inode(inode)->i_pg_inv_work)) { |
| dout("ceph_queue_invalidate %p\n", inode); |
| igrab(inode); |
| } else { |
| dout("ceph_queue_invalidate %p failed\n", inode); |
| } |
| } |
| |
| /* |
| * invalidate any pages that are not dirty or under writeback. this |
| * includes pages that are clean and mapped. |
| */ |
| static void ceph_invalidate_nondirty_pages(struct address_space *mapping) |
| { |
| struct pagevec pvec; |
| pgoff_t next = 0; |
| int i; |
| |
| pagevec_init(&pvec, 0); |
| while (pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) { |
| for (i = 0; i < pagevec_count(&pvec); i++) { |
| struct page *page = pvec.pages[i]; |
| pgoff_t index; |
| int skip_page = |
| (PageDirty(page) || PageWriteback(page)); |
| |
| if (!skip_page) |
| skip_page = !trylock_page(page); |
| |
| /* |
| * We really shouldn't be looking at the ->index of an |
| * unlocked page. But we're not allowed to lock these |
| * pages. So we rely upon nobody altering the ->index |
| * of this (pinned-by-us) page. |
| */ |
| index = page->index; |
| if (index > next) |
| next = index; |
| next++; |
| |
| if (skip_page) |
| continue; |
| |
| generic_error_remove_page(mapping, page); |
| unlock_page(page); |
| } |
| pagevec_release(&pvec); |
| cond_resched(); |
| } |
| } |
| |
| /* |
| * Invalidate inode pages in a worker thread. (This can't be done |
| * in the message handler context.) |
| */ |
| static void ceph_invalidate_work(struct work_struct *work) |
| { |
| struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| i_pg_inv_work); |
| struct inode *inode = &ci->vfs_inode; |
| u32 orig_gen; |
| int check = 0; |
| |
| spin_lock(&inode->i_lock); |
| dout("invalidate_pages %p gen %d revoking %d\n", inode, |
| ci->i_rdcache_gen, ci->i_rdcache_revoking); |
| if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
| /* nevermind! */ |
| spin_unlock(&inode->i_lock); |
| goto out; |
| } |
| orig_gen = ci->i_rdcache_gen; |
| spin_unlock(&inode->i_lock); |
| |
| ceph_invalidate_nondirty_pages(inode->i_mapping); |
| |
| spin_lock(&inode->i_lock); |
| if (orig_gen == ci->i_rdcache_gen && |
| orig_gen == ci->i_rdcache_revoking) { |
| dout("invalidate_pages %p gen %d successful\n", inode, |
| ci->i_rdcache_gen); |
| ci->i_rdcache_revoking--; |
| check = 1; |
| } else { |
| dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
| inode, orig_gen, ci->i_rdcache_gen, |
| ci->i_rdcache_revoking); |
| } |
| spin_unlock(&inode->i_lock); |
| |
| if (check) |
| ceph_check_caps(ci, 0, NULL); |
| out: |
| iput(inode); |
| } |
| |
| |
| /* |
| * called by trunc_wq; take i_mutex ourselves |
| * |
| * We also truncate in a separate thread as well. |
| */ |
| static void ceph_vmtruncate_work(struct work_struct *work) |
| { |
| struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| i_vmtruncate_work); |
| struct inode *inode = &ci->vfs_inode; |
| |
| dout("vmtruncate_work %p\n", inode); |
| mutex_lock(&inode->i_mutex); |
| __ceph_do_pending_vmtruncate(inode); |
| mutex_unlock(&inode->i_mutex); |
| iput(inode); |
| } |
| |
| /* |
| * Queue an async vmtruncate. If we fail to queue work, we will handle |
| * the truncation the next time we call __ceph_do_pending_vmtruncate. |
| */ |
| void ceph_queue_vmtruncate(struct inode *inode) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| |
| if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
| &ci->i_vmtruncate_work)) { |
| dout("ceph_queue_vmtruncate %p\n", inode); |
| igrab(inode); |
| } else { |
| dout("ceph_queue_vmtruncate %p failed, pending=%d\n", |
| inode, ci->i_truncate_pending); |
| } |
| } |
| |
| /* |
| * called with i_mutex held. |
| * |
| * Make sure any pending truncation is applied before doing anything |
| * that may depend on it. |
| */ |
| void __ceph_do_pending_vmtruncate(struct inode *inode) |
| { |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| u64 to; |
| int wrbuffer_refs, wake = 0; |
| |
| retry: |
| spin_lock(&inode->i_lock); |
| if (ci->i_truncate_pending == 0) { |
| dout("__do_pending_vmtruncate %p none pending\n", inode); |
| spin_unlock(&inode->i_lock); |
| return; |
| } |
| |
| /* |
| * make sure any dirty snapped pages are flushed before we |
| * possibly truncate them.. so write AND block! |
| */ |
| if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { |
| dout("__do_pending_vmtruncate %p flushing snaps first\n", |
| inode); |
| spin_unlock(&inode->i_lock); |
| filemap_write_and_wait_range(&inode->i_data, 0, |
| inode->i_sb->s_maxbytes); |
| goto retry; |
| } |
| |
| to = ci->i_truncate_size; |
| wrbuffer_refs = ci->i_wrbuffer_ref; |
| dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, |
| ci->i_truncate_pending, to); |
| spin_unlock(&inode->i_lock); |
| |
| truncate_inode_pages(inode->i_mapping, to); |
| |
| spin_lock(&inode->i_lock); |
| ci->i_truncate_pending--; |
| if (ci->i_truncate_pending == 0) |
| wake = 1; |
| spin_unlock(&inode->i_lock); |
| |
| if (wrbuffer_refs == 0) |
| ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |
| if (wake) |
| wake_up_all(&ci->i_cap_wq); |
| } |
| |
| |
| /* |
| * symlinks |
| */ |
| static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) |
| { |
| struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); |
| nd_set_link(nd, ci->i_symlink); |
| return NULL; |
| } |
| |
| static const struct inode_operations ceph_symlink_iops = { |
| .readlink = generic_readlink, |
| .follow_link = ceph_sym_follow_link, |
| }; |
| |
| /* |
| * setattr |
| */ |
| int ceph_setattr(struct dentry *dentry, struct iattr *attr) |
| { |
| struct inode *inode = dentry->d_inode; |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| struct inode *parent_inode = dentry->d_parent->d_inode; |
| const unsigned int ia_valid = attr->ia_valid; |
| struct ceph_mds_request *req; |
| struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; |
| int issued; |
| int release = 0, dirtied = 0; |
| int mask = 0; |
| int err = 0; |
| |
| if (ceph_snap(inode) != CEPH_NOSNAP) |
| return -EROFS; |
| |
| __ceph_do_pending_vmtruncate(inode); |
| |
| err = inode_change_ok(inode, attr); |
| if (err != 0) |
| return err; |
| |
| req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, |
| USE_AUTH_MDS); |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| |
| spin_lock(&inode->i_lock); |
| issued = __ceph_caps_issued(ci, NULL); |
| dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); |
| |
| if (ia_valid & ATTR_UID) { |
| dout("setattr %p uid %d -> %d\n", inode, |
| inode->i_uid, attr->ia_uid); |
| if (issued & CEPH_CAP_AUTH_EXCL) { |
| inode->i_uid = attr->ia_uid; |
| dirtied |= CEPH_CAP_AUTH_EXCL; |
| } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| attr->ia_uid != inode->i_uid) { |
| req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid); |
| mask |= CEPH_SETATTR_UID; |
| release |= CEPH_CAP_AUTH_SHARED; |
| } |
| } |
| if (ia_valid & ATTR_GID) { |
| dout("setattr %p gid %d -> %d\n", inode, |
| inode->i_gid, attr->ia_gid); |
| if (issued & CEPH_CAP_AUTH_EXCL) { |
| inode->i_gid = attr->ia_gid; |
| dirtied |= CEPH_CAP_AUTH_EXCL; |
| } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| attr->ia_gid != inode->i_gid) { |
| req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid); |
| mask |= CEPH_SETATTR_GID; |
| release |= CEPH_CAP_AUTH_SHARED; |
| } |
| } |
| if (ia_valid & ATTR_MODE) { |
| dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, |
| attr->ia_mode); |
| if (issued & CEPH_CAP_AUTH_EXCL) { |
| inode->i_mode = attr->ia_mode; |
| dirtied |= CEPH_CAP_AUTH_EXCL; |
| } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| attr->ia_mode != inode->i_mode) { |
| req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); |
| mask |= CEPH_SETATTR_MODE; |
| release |= CEPH_CAP_AUTH_SHARED; |
| } |
| } |
| |
| if (ia_valid & ATTR_ATIME) { |
| dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, |
| inode->i_atime.tv_sec, inode->i_atime.tv_nsec, |
| attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); |
| if (issued & CEPH_CAP_FILE_EXCL) { |
| ci->i_time_warp_seq++; |
| inode->i_atime = attr->ia_atime; |
| dirtied |= CEPH_CAP_FILE_EXCL; |
| } else if ((issued & CEPH_CAP_FILE_WR) && |
| timespec_compare(&inode->i_atime, |
| &attr->ia_atime) < 0) { |
| inode->i_atime = attr->ia_atime; |
| dirtied |= CEPH_CAP_FILE_WR; |
| } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| !timespec_equal(&inode->i_atime, &attr->ia_atime)) { |
| ceph_encode_timespec(&req->r_args.setattr.atime, |
| &attr->ia_atime); |
| mask |= CEPH_SETATTR_ATIME; |
| release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | |
| CEPH_CAP_FILE_WR; |
| } |
| } |
| if (ia_valid & ATTR_MTIME) { |
| dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, |
| inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, |
| attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); |
| if (issued & CEPH_CAP_FILE_EXCL) { |
| ci->i_time_warp_seq++; |
| inode->i_mtime = attr->ia_mtime; |
| dirtied |= CEPH_CAP_FILE_EXCL; |
| } else if ((issued & CEPH_CAP_FILE_WR) && |
| timespec_compare(&inode->i_mtime, |
| &attr->ia_mtime) < 0) { |
| inode->i_mtime = attr->ia_mtime; |
| dirtied |= CEPH_CAP_FILE_WR; |
| } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { |
| ceph_encode_timespec(&req->r_args.setattr.mtime, |
| &attr->ia_mtime); |
| mask |= CEPH_SETATTR_MTIME; |
| release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | |
| CEPH_CAP_FILE_WR; |
| } |
| } |
| if (ia_valid & ATTR_SIZE) { |
| dout("setattr %p size %lld -> %lld\n", inode, |
| inode->i_size, attr->ia_size); |
| if (attr->ia_size > inode->i_sb->s_maxbytes) { |
| err = -EINVAL; |
| goto out; |
| } |
| if ((issued & CEPH_CAP_FILE_EXCL) && |
| attr->ia_size > inode->i_size) { |
| inode->i_size = attr->ia_size; |
| inode->i_blocks = |
| (attr->ia_size + (1 << 9) - 1) >> 9; |
| inode->i_ctime = attr->ia_ctime; |
| ci->i_reported_size = attr->ia_size; |
| dirtied |= CEPH_CAP_FILE_EXCL; |
| } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| attr->ia_size != inode->i_size) { |
| req->r_args.setattr.size = cpu_to_le64(attr->ia_size); |
| req->r_args.setattr.old_size = |
| cpu_to_le64(inode->i_size); |
| mask |= CEPH_SETATTR_SIZE; |
| release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | |
| CEPH_CAP_FILE_WR; |
| } |
| } |
| |
| /* these do nothing */ |
| if (ia_valid & ATTR_CTIME) { |
| bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| |
| ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; |
| dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, |
| inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, |
| attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, |
| only ? "ctime only" : "ignored"); |
| inode->i_ctime = attr->ia_ctime; |
| if (only) { |
| /* |
| * if kernel wants to dirty ctime but nothing else, |
| * we need to choose a cap to dirty under, or do |
| * a almost-no-op setattr |
| */ |
| if (issued & CEPH_CAP_AUTH_EXCL) |
| dirtied |= CEPH_CAP_AUTH_EXCL; |
| else if (issued & CEPH_CAP_FILE_EXCL) |
| dirtied |= CEPH_CAP_FILE_EXCL; |
| else if (issued & CEPH_CAP_XATTR_EXCL) |
| dirtied |= CEPH_CAP_XATTR_EXCL; |
| else |
| mask |= CEPH_SETATTR_CTIME; |
| } |
| } |
| if (ia_valid & ATTR_FILE) |
| dout("setattr %p ATTR_FILE ... hrm!\n", inode); |
| |
| if (dirtied) { |
| __ceph_mark_dirty_caps(ci, dirtied); |
| inode->i_ctime = CURRENT_TIME; |
| } |
| |
| release &= issued; |
| spin_unlock(&inode->i_lock); |
| |
| if (mask) { |
| req->r_inode = igrab(inode); |
| req->r_inode_drop = release; |
| req->r_args.setattr.mask = cpu_to_le32(mask); |
| req->r_num_caps = 1; |
| err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
| } |
| dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, |
| ceph_cap_string(dirtied), mask); |
| |
| ceph_mdsc_put_request(req); |
| __ceph_do_pending_vmtruncate(inode); |
| return err; |
| out: |
| spin_unlock(&inode->i_lock); |
| ceph_mdsc_put_request(req); |
| return err; |
| } |
| |
| /* |
| * Verify that we have a lease on the given mask. If not, |
| * do a getattr against an mds. |
| */ |
| int ceph_do_getattr(struct inode *inode, int mask) |
| { |
| struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
| struct ceph_mds_client *mdsc = fsc->mdsc; |
| struct ceph_mds_request *req; |
| int err; |
| |
| if (ceph_snap(inode) == CEPH_SNAPDIR) { |
| dout("do_getattr inode %p SNAPDIR\n", inode); |
| return 0; |
| } |
| |
| dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); |
| if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
| return 0; |
| |
| req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| req->r_inode = igrab(inode); |
| req->r_num_caps = 1; |
| req->r_args.getattr.mask = cpu_to_le32(mask); |
| err = ceph_mdsc_do_request(mdsc, NULL, req); |
| ceph_mdsc_put_request(req); |
| dout("do_getattr result=%d\n", err); |
| return err; |
| } |
| |
| |
| /* |
| * Check inode permissions. We verify we have a valid value for |
| * the AUTH cap, then call the generic handler. |
| */ |
| int ceph_permission(struct inode *inode, int mask) |
| { |
| int err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); |
| |
| if (!err) |
| err = generic_permission(inode, mask, NULL); |
| return err; |
| } |
| |
| /* |
| * Get all attributes. Hopefully somedata we'll have a statlite() |
| * and can limit the fields we require to be accurate. |
| */ |
| int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| struct kstat *stat) |
| { |
| struct inode *inode = dentry->d_inode; |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| int err; |
| |
| err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); |
| if (!err) { |
| generic_fillattr(inode, stat); |
| stat->ino = inode->i_ino; |
| if (ceph_snap(inode) != CEPH_NOSNAP) |
| stat->dev = ceph_snap(inode); |
| else |
| stat->dev = 0; |
| if (S_ISDIR(inode->i_mode)) { |
| stat->size = ci->i_rbytes; |
| stat->blocks = 0; |
| stat->blksize = 65536; |
| } |
| } |
| return err; |
| } |