// SPDX-License-Identifier: GPL-2.0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "super.h" #include "mds_client.h" #include "cache.h" #include /* * 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 */ static int ceph_set_ino_cb(struct inode *inode, void *data) { ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); return 0; } 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) 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_snapdir_iops; inode->i_fop = &ceph_snapdir_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, .listxattr = ceph_listxattr, .get_acl = ceph_get_acl, .set_acl = ceph_set_acl, }; /* * 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) 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. */ static 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; 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); return t; } u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, struct ceph_inode_frag *pfrag, int *found) { u32 ret; mutex_lock(&ci->i_fragtree_mutex); ret = __ceph_choose_frag(ci, v, pfrag, found); mutex_unlock(&ci->i_fragtree_mutex); return ret; } /* * 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 diri_auth = -1; int i; int err = 0; spin_lock(&ci->i_ceph_lock); if (ci->i_auth_cap) diri_auth = ci->i_auth_cap->mds; spin_unlock(&ci->i_ceph_lock); if (mds == -1) /* CDIR_AUTH_PARENT */ mds = diri_auth; mutex_lock(&ci->i_fragtree_mutex); if (ndist == 0 && mds == diri_auth) { /* 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; } static int frag_tree_split_cmp(const void *l, const void *r) { struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; return ceph_frag_compare(le32_to_cpu(ls->frag), le32_to_cpu(rs->frag)); } static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) { if (!frag) return f == ceph_frag_make(0, 0); if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) return false; return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); } static int ceph_fill_fragtree(struct inode *inode, struct ceph_frag_tree_head *fragtree, struct ceph_mds_reply_dirfrag *dirinfo) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_inode_frag *frag, *prev_frag = NULL; struct rb_node *rb_node; unsigned i, split_by, nsplits; u32 id; bool update = false; mutex_lock(&ci->i_fragtree_mutex); nsplits = le32_to_cpu(fragtree->nsplits); if (nsplits != ci->i_fragtree_nsplits) { update = true; } else if (nsplits) { i = prandom_u32() % nsplits; id = le32_to_cpu(fragtree->splits[i].frag); if (!__ceph_find_frag(ci, id)) update = true; } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { rb_node = rb_first(&ci->i_fragtree); frag = rb_entry(rb_node, struct ceph_inode_frag, node); if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) update = true; } if (!update && dirinfo) { id = le32_to_cpu(dirinfo->frag); if (id != __ceph_choose_frag(ci, id, NULL, NULL)) update = true; } if (!update) goto out_unlock; if (nsplits > 1) { sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), frag_tree_split_cmp, NULL); } dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); rb_node = rb_first(&ci->i_fragtree); for (i = 0; i < nsplits; i++) { id = le32_to_cpu(fragtree->splits[i].frag); split_by = le32_to_cpu(fragtree->splits[i].by); if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { pr_err("fill_fragtree %llx.%llx invalid split %d/%u, " "frag %x split by %d\n", ceph_vinop(inode), i, nsplits, id, split_by); continue; } frag = NULL; while (rb_node) { frag = rb_entry(rb_node, struct ceph_inode_frag, node); if (ceph_frag_compare(frag->frag, id) >= 0) { if (frag->frag != id) frag = NULL; else rb_node = rb_next(rb_node); break; } rb_node = rb_next(rb_node); /* delete stale split/leaf node */ if (frag->split_by > 0 || !is_frag_child(frag->frag, prev_frag)) { rb_erase(&frag->node, &ci->i_fragtree); if (frag->split_by > 0) ci->i_fragtree_nsplits--; kfree(frag); } frag = NULL; } if (!frag) { frag = __get_or_create_frag(ci, id); if (IS_ERR(frag)) continue; } if (frag->split_by == 0) ci->i_fragtree_nsplits++; frag->split_by = split_by; dout(" frag %x split by %d\n", frag->frag, frag->split_by); prev_frag = frag; } while (rb_node) { frag = rb_entry(rb_node, struct ceph_inode_frag, node); rb_node = rb_next(rb_node); /* delete stale split/leaf node */ if (frag->split_by > 0 || !is_frag_child(frag->frag, prev_frag)) { rb_erase(&frag->node, &ci->i_fragtree); if (frag->split_by > 0) ci->i_fragtree_nsplits--; kfree(frag); } } out_unlock: mutex_unlock(&ci->i_fragtree_mutex); return 0; } /* * 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); spin_lock_init(&ci->i_ceph_lock); ci->i_version = 0; ci->i_inline_version = 0; ci->i_time_warp_seq = 0; ci->i_ceph_flags = 0; atomic64_set(&ci->i_ordered_count, 1); atomic64_set(&ci->i_release_count, 1); atomic64_set(&ci->i_complete_seq[0], 0); atomic64_set(&ci->i_complete_seq[1], 0); ci->i_symlink = NULL; ci->i_max_bytes = 0; ci->i_max_files = 0; memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); RCU_INIT_POINTER(ci->i_layout.pool_ns, 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_prealloc_cap_flush = NULL; INIT_LIST_HEAD(&ci->i_cap_flush_list); 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); INIT_LIST_HEAD(&ci->i_cap_snaps); ci->i_head_snapc = NULL; ci->i_snap_caps = 0; for (i = 0; i < CEPH_FILE_MODE_BITS; i++) ci->i_nr_by_mode[i] = 0; mutex_init(&ci->i_truncate_mutex); 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_wb_ref = 0; ci->i_wrbuffer_ref = 0; ci->i_wrbuffer_ref_head = 0; atomic_set(&ci->i_filelock_ref, 0); atomic_set(&ci->i_shared_gen, 0); ci->i_rdcache_gen = 0; ci->i_rdcache_revoking = 0; INIT_LIST_HEAD(&ci->i_unsafe_dirops); INIT_LIST_HEAD(&ci->i_unsafe_iops); 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); ceph_fscache_inode_init(ci); 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); kfree(ci->i_symlink); kmem_cache_free(ceph_inode_cachep, ci); } void ceph_evict_inode(struct inode *inode) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_inode_frag *frag; struct rb_node *n; dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); truncate_inode_pages_final(&inode->i_data); clear_inode(inode); ceph_fscache_unregister_inode_cookie(ci); ceph_queue_caps_release(inode); if (__ceph_has_any_quota(ci)) ceph_adjust_quota_realms_count(inode, false); /* * we may still have a snap_realm reference if there are stray * caps in 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); ci->i_snap_realm = NULL; if (realm->ino == ci->i_vino.ino) realm->inode = NULL; spin_unlock(&realm->inodes_with_caps_lock); ceph_put_snap_realm(mdsc, realm); } 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); } ci->i_fragtree_nsplits = 0; __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); ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); call_rcu(&inode->i_rcu, ceph_i_callback); } int ceph_drop_inode(struct inode *inode) { /* * Positve dentry and corresponding inode are always accompanied * in MDS reply. So no need to keep inode in the cache after * dropping all its aliases. */ return 1; } static inline blkcnt_t calc_inode_blocks(u64 size) { return (size + (1<<9) - 1) >> 9; } /* * 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); if (size > 0 && S_ISDIR(inode->i_mode)) { pr_err("fill_file_size non-zero size for directory\n"); size = 0; } i_size_write(inode, size); inode->i_blocks = calc_inode_blocks(size); 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; /* the MDS should have revoked these caps */ WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_LAZYIO)); /* * 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_BUFFER)) || 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; } if (queue_trunc) ceph_fscache_invalidate(inode); return queue_trunc; } void ceph_fill_file_time(struct inode *inode, int issued, u64 time_warp_seq, struct timespec64 *ctime, struct timespec64 *mtime, struct timespec64 *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 (ci->i_version == 0 || timespec64_compare(ctime, &inode->i_ctime) > 0) { dout("ctime %lld.%09ld -> %lld.%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 (ci->i_version == 0 || ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { /* the MDS did a utimes() */ dout("mtime %lld.%09ld -> %lld.%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 (timespec64_compare(mtime, &inode->i_mtime) > 0) { dout("mtime %lld.%09ld -> %lld.%09ld inc\n", inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, mtime->tv_sec, mtime->tv_nsec); inode->i_mtime = *mtime; } if (timespec64_compare(atime, &inode->i_atime) > 0) { dout("atime %lld.%09ld -> %lld.%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 page *locked_page, 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_client *mdsc = ceph_inode_to_client(inode)->mdsc; struct ceph_mds_reply_inode *info = iinfo->in; struct ceph_inode_info *ci = ceph_inode(inode); int issued, new_issued, info_caps; struct timespec64 mtime, atime, ctime; struct ceph_buffer *xattr_blob = NULL; struct ceph_buffer *old_blob = NULL; struct ceph_string *pool_ns = NULL; struct ceph_cap *new_cap = NULL; int err = 0; bool wake = false; bool queue_trunc = false; bool new_version = false; bool fill_inline = false; dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode), le64_to_cpu(info->version), ci->i_version); info_caps = le32_to_cpu(info->cap.caps); /* prealloc new cap struct */ if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) new_cap = ceph_get_cap(mdsc, caps_reservation); /* * 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); } if (iinfo->pool_ns_len > 0) pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, iinfo->pool_ns_len); spin_lock(&ci->i_ceph_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 (ci->i_version == 0 || ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && le64_to_cpu(info->version) > (ci->i_version & ~1))) new_version = true; __ceph_caps_issued(ci, &issued); issued |= __ceph_caps_dirty(ci); new_issued = ~issued & info_caps; /* update inode */ inode->i_rdev = le32_to_cpu(info->rdev); inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && (issued & CEPH_CAP_AUTH_EXCL) == 0) { inode->i_mode = le32_to_cpu(info->mode); inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, from_kuid(&init_user_ns, inode->i_uid), from_kgid(&init_user_ns, inode->i_gid)); } if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && (issued & CEPH_CAP_LINK_EXCL) == 0) set_nlink(inode, le32_to_cpu(info->nlink)); if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { /* be careful with mtime, atime, size */ ceph_decode_timespec64(&atime, &info->atime); ceph_decode_timespec64(&mtime, &info->mtime); ceph_decode_timespec64(&ctime, &info->ctime); ceph_fill_file_time(inode, issued, le32_to_cpu(info->time_warp_seq), &ctime, &mtime, &atime); } if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { ci->i_files = le64_to_cpu(info->files); ci->i_subdirs = le64_to_cpu(info->subdirs); } if (new_version || (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { s64 old_pool = ci->i_layout.pool_id; struct ceph_string *old_ns; ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, lockdep_is_held(&ci->i_ceph_lock)); rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; pool_ns = old_ns; 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)); /* 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); } } /* layout and rstat are not tracked by capability, update them if * the inode info is from auth mds */ if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { if (S_ISDIR(inode->i_mode)) { ci->i_dir_layout = iinfo->dir_layout; 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_timespec64(&ci->i_rctime, &info->rctime); } } /* xattrs */ /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { if (ci->i_xattrs.blob) old_blob = 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); ceph_forget_all_cached_acls(inode); xattr_blob = NULL; } /* finally update i_version */ if (le64_to_cpu(info->version) > ci->i_version) ci->i_version = le64_to_cpu(info->version); inode->i_mapping->a_ops = &ceph_aops; 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) { u32 symlen = iinfo->symlink_len; char *sym; spin_unlock(&ci->i_ceph_lock); if (symlen != i_size_read(inode)) { pr_err("fill_inode %llx.%llx BAD symlink " "size %lld\n", ceph_vinop(inode), i_size_read(inode)); i_size_write(inode, symlen); inode->i_blocks = calc_inode_blocks(symlen); } err = -ENOMEM; sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); if (!sym) goto out; spin_lock(&ci->i_ceph_lock); if (!ci->i_symlink) ci->i_symlink = sym; else kfree(sym); /* lost a race */ } inode->i_link = ci->i_symlink; break; case S_IFDIR: inode->i_op = &ceph_dir_iops; inode->i_fop = &ceph_dir_fops; break; default: pr_err("fill_inode %llx.%llx BAD mode 0%o\n", ceph_vinop(inode), inode->i_mode); } /* were we issued a capability? */ if (info_caps) { if (ceph_snap(inode) == CEPH_NOSNAP) { ceph_add_cap(inode, session, le64_to_cpu(info->cap.cap_id), cap_fmode, info_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, &new_cap); /* set dir completion flag? */ if (S_ISDIR(inode->i_mode) && ci->i_files == 0 && ci->i_subdirs == 0 && (info_caps & CEPH_CAP_FILE_SHARED) && (issued & CEPH_CAP_FILE_EXCL) == 0 && !__ceph_dir_is_complete(ci)) { dout(" marking %p complete (empty)\n", inode); i_size_write(inode, 0); __ceph_dir_set_complete(ci, atomic64_read(&ci->i_release_count), atomic64_read(&ci->i_ordered_count)); } wake = true; } else { dout(" %p got snap_caps %s\n", inode, ceph_cap_string(info_caps)); ci->i_snap_caps |= info_caps; if (cap_fmode >= 0) __ceph_get_fmode(ci, cap_fmode); } } else if (cap_fmode >= 0) { pr_warn("mds issued no caps on %llx.%llx\n", ceph_vinop(inode)); __ceph_get_fmode(ci, cap_fmode); } if (iinfo->inline_version > 0 && iinfo->inline_version >= ci->i_inline_version) { int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; ci->i_inline_version = iinfo->inline_version; if (ci->i_inline_version != CEPH_INLINE_NONE && (locked_page || (info_caps & cache_caps))) fill_inline = true; } spin_unlock(&ci->i_ceph_lock); if (fill_inline) ceph_fill_inline_data(inode, locked_page, iinfo->inline_data, iinfo->inline_len); if (wake) wake_up_all(&ci->i_cap_wq); /* queue truncate if we saw i_size decrease */ if (queue_trunc) ceph_queue_vmtruncate(inode); /* populate frag tree */ if (S_ISDIR(inode->i_mode)) ceph_fill_fragtree(inode, &info->fragtree, dirinfo); /* update delegation info? */ if (dirinfo) ceph_fill_dirfrag(inode, dirinfo); err = 0; out: if (new_cap) ceph_put_cap(mdsc, new_cap); ceph_buffer_put(old_blob); ceph_buffer_put(xattr_blob); ceph_put_string(pool_ns); 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_vino *tgt_vino, struct ceph_vino *dir_vino) { 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; struct ceph_mds_session *old_lease_session = NULL; /* * Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that * we expect a negative dentry. */ if (!tgt_vino && d_really_is_positive(dentry)) return; if (tgt_vino && (d_really_is_negative(dentry) || !ceph_ino_compare(d_inode(dentry), tgt_vino))) return; spin_lock(&dentry->d_lock); dout("update_dentry_lease %p duration %lu ms ttl %lu\n", dentry, duration, ttl); dir = d_inode(dentry->d_parent); /* make sure parent matches dir_vino */ if (!ceph_ino_compare(dir, dir_vino)) goto out_unlock; /* only track leases on regular dentries */ if (ceph_snap(dir) != CEPH_NOSNAP) goto out_unlock; di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); if (duration == 0) goto out_unlock; if (di->lease_gen == session->s_cap_gen && time_before(ttl, di->time)) goto out_unlock; /* we already have a newer lease. */ if (di->lease_session && di->lease_session != session) { old_lease_session = di->lease_session; di->lease_session = NULL; } 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; di->time = ttl; out_unlock: spin_unlock(&dentry->d_lock); if (old_lease_session) ceph_put_mds_session(old_lease_session); } /* * splice a dentry to an inode. * caller must hold directory i_mutex for this to be safe. */ static struct dentry *splice_dentry(struct dentry *dn, struct inode *in) { struct dentry *realdn; BUG_ON(d_inode(dn)); if (S_ISDIR(in->i_mode)) { /* If inode is directory, d_splice_alias() below will remove * 'realdn' from its origin parent. We need to ensure that * origin parent's readdir cache will not reference 'realdn' */ realdn = d_find_any_alias(in); if (realdn) { struct ceph_dentry_info *di = ceph_dentry(realdn); spin_lock(&realdn->d_lock); realdn->d_op->d_prune(realdn); di->time = jiffies; di->lease_shared_gen = 0; di->offset = 0; spin_unlock(&realdn->d_lock); dput(realdn); } } /* dn must be unhashed */ if (!d_unhashed(dn)) d_drop(dn); realdn = d_splice_alias(in, dn); 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)); dn = realdn; /* * Caller should release 'dn' in the case of error. * If 'req->r_dentry' is passed to this function, * caller should leave 'req->r_dentry' untouched. */ goto out; } else if (realdn) { dout("dn %p (%d) spliced with %p (%d) " "inode %p ino %llx.%llx\n", dn, d_count(dn), realdn, d_count(realdn), d_inode(realdn), ceph_vinop(d_inode(realdn))); dput(dn); dn = realdn; } else { BUG_ON(!ceph_dentry(dn)); dout("dn %p attached to %p ino %llx.%llx\n", dn, d_inode(dn), ceph_vinop(d_inode(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 = req->r_session; struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; struct inode *in = NULL; struct ceph_vino tvino, dvino; struct ceph_fs_client *fsc = ceph_sb_to_client(sb); int err = 0; dout("fill_trace %p is_dentry %d is_target %d\n", req, rinfo->head->is_dentry, rinfo->head->is_target); if (!rinfo->head->is_target && !rinfo->head->is_dentry) { dout("fill_trace reply is empty!\n"); if (rinfo->head->result == 0 && req->r_parent) ceph_invalidate_dir_request(req); return 0; } if (rinfo->head->is_dentry) { struct inode *dir = req->r_parent; if (dir) { err = fill_inode(dir, NULL, &rinfo->diri, rinfo->dirfrag, session, req->r_request_started, -1, &req->r_caps_reservation); if (err < 0) goto done; } else { WARN_ON_ONCE(1); } if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) { struct qstr dname; struct dentry *dn, *parent; BUG_ON(!rinfo->head->is_target); BUG_ON(req->r_dentry); parent = d_find_any_alias(dir); BUG_ON(!parent); dname.name = rinfo->dname; dname.len = rinfo->dname_len; dname.hash = full_name_hash(parent, dname.name, dname.len); tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); tvino.snap = le64_to_cpu(rinfo->targeti.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) { dput(parent); err = -ENOMEM; goto done; } err = 0; } else if (d_really_is_positive(dn) && (ceph_ino(d_inode(dn)) != tvino.ino || ceph_snap(d_inode(dn)) != tvino.snap)) { dout(" dn %p points to wrong inode %p\n", dn, d_inode(dn)); ceph_dir_clear_ordered(dir); d_delete(dn); dput(dn); goto retry_lookup; } req->r_dentry = dn; dput(parent); } } if (rinfo->head->is_target) { tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); in = ceph_get_inode(sb, tvino); if (IS_ERR(in)) { err = PTR_ERR(in); goto done; } req->r_target_inode = in; err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL, session, req->r_request_started, (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 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; } } /* * ignore null lease/binding on snapdir ENOENT, or else we * will have trouble splicing in the virtual snapdir later */ if (rinfo->head->is_dentry && !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && (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_parent; struct dentry *dn = req->r_dentry; bool have_dir_cap, have_lease; BUG_ON(!dn); BUG_ON(!dir); BUG_ON(d_inode(dn->d_parent) != dir); dvino.ino = le64_to_cpu(rinfo->diri.in->ino); dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); BUG_ON(ceph_ino(dir) != dvino.ino); BUG_ON(ceph_snap(dir) != dvino.snap); /* 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 || le32_to_cpu(rinfo->dlease->duration_ms); 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) { struct inode *olddir = req->r_old_dentry_dir; BUG_ON(!olddir); dout(" src %p '%pd' dst %p '%pd'\n", req->r_old_dentry, req->r_old_dentry, dn, dn); dout("fill_trace doing d_move %p -> %p\n", req->r_old_dentry, dn); /* d_move screws up sibling dentries' offsets */ ceph_dir_clear_ordered(dir); ceph_dir_clear_ordered(olddir); d_move(req->r_old_dentry, dn); dout(" src %p '%pd' dst %p '%pd'\n", req->r_old_dentry, req->r_old_dentry, dn, dn); /* ensure target dentry is invalidated, despite rehashing bug in vfs_rename_dir */ ceph_invalidate_dentry_lease(dn); dout("dn %p gets new offset %lld\n", req->r_old_dentry, ceph_dentry(req->r_old_dentry)->offset); dn = req->r_old_dentry; /* use old_dentry */ } /* null dentry? */ if (!rinfo->head->is_target) { dout("fill_trace null dentry\n"); if (d_really_is_positive(dn)) { dout("d_delete %p\n", dn); ceph_dir_clear_ordered(dir); d_delete(dn); } else if (have_lease) { if (d_unhashed(dn)) d_add(dn, NULL); update_dentry_lease(dn, rinfo->dlease, session, req->r_request_started, NULL, &dvino); } goto done; } /* attach proper inode */ if (d_really_is_negative(dn)) { ceph_dir_clear_ordered(dir); ihold(in); dn = splice_dentry(dn, in); if (IS_ERR(dn)) { err = PTR_ERR(dn); goto done; } req->r_dentry = dn; /* may have spliced */ } else if (d_really_is_positive(dn) && d_inode(dn) != in) { dout(" %p links to %p %llx.%llx, not %llx.%llx\n", dn, d_inode(dn), ceph_vinop(d_inode(dn)), ceph_vinop(in)); d_invalidate(dn); have_lease = false; } if (have_lease) { tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); update_dentry_lease(dn, rinfo->dlease, session, req->r_request_started, &tvino, &dvino); } dout(" final dn %p\n", dn); } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || req->r_op == CEPH_MDS_OP_MKSNAP) && !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { struct dentry *dn = req->r_dentry; struct inode *dir = req->r_parent; /* fill out a snapdir LOOKUPSNAP dentry */ BUG_ON(!dn); BUG_ON(!dir); BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); dout(" linking snapped dir %p to dn %p\n", in, dn); ceph_dir_clear_ordered(dir); ihold(in); dn = splice_dentry(dn, in); if (IS_ERR(dn)) { err = PTR_ERR(dn); goto done; } req->r_dentry = dn; /* may have spliced */ } else if (rinfo->head->is_dentry) { struct ceph_vino *ptvino = NULL; if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) || le32_to_cpu(rinfo->dlease->duration_ms)) { dvino.ino = le64_to_cpu(rinfo->diri.in->ino); dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); if (rinfo->head->is_target) { tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); ptvino = &tvino; } update_dentry_lease(req->r_dentry, rinfo->dlease, session, req->r_request_started, ptvino, &dvino); } else { dout("%s: no dentry lease or dir cap\n", __func__); } } done: dout("fill_trace done err=%d\n", err); return err; } /* * Prepopulate our cache with readdir results, leases, etc. */ static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, struct ceph_mds_session *session) { struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; int i, err = 0; for (i = 0; i < rinfo->dir_nr; i++) { struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; struct ceph_vino vino; struct inode *in; int rc; vino.ino = le64_to_cpu(rde->inode.in->ino); vino.snap = le64_to_cpu(rde->inode.in->snapid); in = ceph_get_inode(req->r_dentry->d_sb, vino); if (IS_ERR(in)) { err = PTR_ERR(in); dout("new_inode badness got %d\n", err); continue; } rc = fill_inode(in, NULL, &rde->inode, NULL, session, req->r_request_started, -1, &req->r_caps_reservation); if (rc < 0) { pr_err("fill_inode badness on %p got %d\n", in, rc); err = rc; } iput(in); } return err; } void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) { if (ctl->page) { kunmap(ctl->page); put_page(ctl->page); ctl->page = NULL; } } static int fill_readdir_cache(struct inode *dir, struct dentry *dn, struct ceph_readdir_cache_control *ctl, struct ceph_mds_request *req) { struct ceph_inode_info *ci = ceph_inode(dir); unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); unsigned idx = ctl->index % nsize; pgoff_t pgoff = ctl->index / nsize; if (!ctl->page || pgoff != page_index(ctl->page)) { ceph_readdir_cache_release(ctl); if (idx == 0) ctl->page = grab_cache_page(&dir->i_data, pgoff); else ctl->page = find_lock_page(&dir->i_data, pgoff); if (!ctl->page) { ctl->index = -1; return idx == 0 ? -ENOMEM : 0; } /* reading/filling the cache are serialized by * i_mutex, no need to use page lock */ unlock_page(ctl->page); ctl->dentries = kmap(ctl->page); if (idx == 0) memset(ctl->dentries, 0, PAGE_SIZE); } if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { dout("readdir cache dn %p idx %d\n", dn, ctl->index); ctl->dentries[idx] = dn; ctl->index++; } else { dout("disable readdir cache\n"); ctl->index = -1; } return 0; } int ceph_readdir_prepopulate(struct ceph_mds_request *req, struct ceph_mds_session *session) { struct dentry *parent = req->r_dentry; struct ceph_inode_info *ci = ceph_inode(d_inode(parent)); struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; struct qstr dname; struct dentry *dn; struct inode *in; int err = 0, skipped = 0, ret, i; struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; u32 frag = le32_to_cpu(rhead->args.readdir.frag); u32 last_hash = 0; u32 fpos_offset; struct ceph_readdir_cache_control cache_ctl = {}; if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) return readdir_prepopulate_inodes_only(req, session); if (rinfo->hash_order) { if (req->r_path2) { last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, req->r_path2, strlen(req->r_path2)); last_hash = ceph_frag_value(last_hash); } else if (rinfo->offset_hash) { /* mds understands offset_hash */ WARN_ON_ONCE(req->r_readdir_offset != 2); last_hash = le32_to_cpu(rhead->args.readdir.offset_hash); } } if (rinfo->dir_dir && le32_to_cpu(rinfo->dir_dir->frag) != frag) { dout("readdir_prepopulate got new frag %x -> %x\n", frag, le32_to_cpu(rinfo->dir_dir->frag)); frag = le32_to_cpu(rinfo->dir_dir->frag); if (!rinfo->hash_order) req->r_readdir_offset = 2; } if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 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(d_inode(parent), rinfo->dir_dir); if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2 && !(rinfo->hash_order && last_hash)) { /* note dir version at start of readdir so we can * tell if any dentries get dropped */ req->r_dir_release_cnt = atomic64_read(&ci->i_release_count); req->r_dir_ordered_cnt = atomic64_read(&ci->i_ordered_count); req->r_readdir_cache_idx = 0; } } cache_ctl.index = req->r_readdir_cache_idx; fpos_offset = req->r_readdir_offset; /* FIXME: release caps/leases if error occurs */ for (i = 0; i < rinfo->dir_nr; i++) { struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; struct ceph_vino tvino, dvino; dname.name = rde->name; dname.len = rde->name_len; dname.hash = full_name_hash(parent, dname.name, dname.len); tvino.ino = le64_to_cpu(rde->inode.in->ino); tvino.snap = le64_to_cpu(rde->inode.in->snapid); if (rinfo->hash_order) { u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, rde->name, rde->name_len); hash = ceph_frag_value(hash); if (hash != last_hash) fpos_offset = 2; last_hash = hash; rde->offset = ceph_make_fpos(hash, fpos_offset++, true); } else { rde->offset = ceph_make_fpos(frag, fpos_offset++, false); } 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) { dout("d_alloc badness\n"); err = -ENOMEM; goto out; } } else if (d_really_is_positive(dn) && (ceph_ino(d_inode(dn)) != tvino.ino || ceph_snap(d_inode(dn)) != tvino.snap)) { struct ceph_dentry_info *di = ceph_dentry(dn); dout(" dn %p points to wrong inode %p\n", dn, d_inode(dn)); spin_lock(&dn->d_lock); if (di->offset > 0 && di->lease_shared_gen == atomic_read(&ci->i_shared_gen)) { __ceph_dir_clear_ordered(ci); di->offset = 0; } spin_unlock(&dn->d_lock); d_delete(dn); dput(dn); goto retry_lookup; } /* inode */ if (d_really_is_positive(dn)) { in = d_inode(dn); } else { in = ceph_get_inode(parent->d_sb, tvino); if (IS_ERR(in)) { dout("new_inode badness\n"); d_drop(dn); dput(dn); err = PTR_ERR(in); goto out; } } ret = fill_inode(in, NULL, &rde->inode, NULL, session, req->r_request_started, -1, &req->r_caps_reservation); if (ret < 0) { pr_err("fill_inode badness on %p\n", in); if (d_really_is_negative(dn)) iput(in); d_drop(dn); err = ret; goto next_item; } if (d_really_is_negative(dn)) { struct dentry *realdn; if (ceph_security_xattr_deadlock(in)) { dout(" skip splicing dn %p to inode %p" " (security xattr deadlock)\n", dn, in); iput(in); skipped++; goto next_item; } realdn = splice_dentry(dn, in); if (IS_ERR(realdn)) { err = PTR_ERR(realdn); d_drop(dn); dn = NULL; goto next_item; } dn = realdn; } ceph_dentry(dn)->offset = rde->offset; dvino = ceph_vino(d_inode(parent)); update_dentry_lease(dn, rde->lease, req->r_session, req->r_request_started, &tvino, &dvino); if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { ret = fill_readdir_cache(d_inode(parent), dn, &cache_ctl, req); if (ret < 0) err = ret; } next_item: if (dn) dput(dn); } out: if (err == 0 && skipped == 0) { set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); req->r_readdir_cache_idx = cache_ctl.index; } ceph_readdir_cache_release(&cache_ctl); dout("readdir_prepopulate done\n"); return err; } bool ceph_inode_set_size(struct inode *inode, loff_t size) { struct ceph_inode_info *ci = ceph_inode(inode); bool ret; spin_lock(&ci->i_ceph_lock); dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); i_size_write(inode, size); inode->i_blocks = calc_inode_blocks(size); ret = __ceph_should_report_size(ci); spin_unlock(&ci->i_ceph_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) { ihold(inode); if (queue_work(ceph_inode_to_client(inode)->wb_wq, &ceph_inode(inode)->i_wb_work)) { dout("ceph_queue_writeback %p\n", inode); } else { dout("ceph_queue_writeback %p failed\n", inode); iput(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) { ihold(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); } else { dout("ceph_queue_invalidate %p failed\n", inode); iput(inode); } } /* * 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; struct ceph_fs_client *fsc = ceph_inode_to_client(inode); u32 orig_gen; int check = 0; mutex_lock(&ci->i_truncate_mutex); if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n", inode, ceph_ino(inode)); mapping_set_error(inode->i_mapping, -EIO); truncate_pagecache(inode, 0); mutex_unlock(&ci->i_truncate_mutex); goto out; } spin_lock(&ci->i_ceph_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) { if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) check = 1; spin_unlock(&ci->i_ceph_lock); mutex_unlock(&ci->i_truncate_mutex); goto out; } orig_gen = ci->i_rdcache_gen; spin_unlock(&ci->i_ceph_lock); if (invalidate_inode_pages2(inode->i_mapping) < 0) { pr_err("invalidate_pages %p fails\n", inode); } spin_lock(&ci->i_ceph_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); if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) check = 1; } spin_unlock(&ci->i_ceph_lock); mutex_unlock(&ci->i_truncate_mutex); out: if (check) ceph_check_caps(ci, 0, NULL); iput(inode); } /* * called by trunc_wq; * * 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); __ceph_do_pending_vmtruncate(inode); 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); ihold(inode); if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, &ci->i_vmtruncate_work)) { dout("ceph_queue_vmtruncate %p\n", inode); } else { dout("ceph_queue_vmtruncate %p failed, pending=%d\n", inode, ci->i_truncate_pending); iput(inode); } } /* * 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, finish = 0; mutex_lock(&ci->i_truncate_mutex); retry: spin_lock(&ci->i_ceph_lock); if (ci->i_truncate_pending == 0) { dout("__do_pending_vmtruncate %p none pending\n", inode); spin_unlock(&ci->i_ceph_lock); mutex_unlock(&ci->i_truncate_mutex); 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) { spin_unlock(&ci->i_ceph_lock); dout("__do_pending_vmtruncate %p flushing snaps first\n", inode); filemap_write_and_wait_range(&inode->i_data, 0, inode->i_sb->s_maxbytes); goto retry; } /* there should be no reader or writer */ WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 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(&ci->i_ceph_lock); truncate_pagecache(inode, to); spin_lock(&ci->i_ceph_lock); if (to == ci->i_truncate_size) { ci->i_truncate_pending = 0; finish = 1; } spin_unlock(&ci->i_ceph_lock); if (!finish) goto retry; mutex_unlock(&ci->i_truncate_mutex); if (wrbuffer_refs == 0) ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); wake_up_all(&ci->i_cap_wq); } /* * symlinks */ static const struct inode_operations ceph_symlink_iops = { .get_link = simple_get_link, .setattr = ceph_setattr, .getattr = ceph_getattr, .listxattr = ceph_listxattr, }; int __ceph_setattr(struct inode *inode, struct iattr *attr) { struct ceph_inode_info *ci = ceph_inode(inode); const unsigned int ia_valid = attr->ia_valid; struct ceph_mds_request *req; struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; struct ceph_cap_flush *prealloc_cf; int issued; int release = 0, dirtied = 0; int mask = 0; int err = 0; int inode_dirty_flags = 0; bool lock_snap_rwsem = false; prealloc_cf = ceph_alloc_cap_flush(); if (!prealloc_cf) return -ENOMEM; req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, USE_AUTH_MDS); if (IS_ERR(req)) { ceph_free_cap_flush(prealloc_cf); return PTR_ERR(req); } spin_lock(&ci->i_ceph_lock); issued = __ceph_caps_issued(ci, NULL); if (!ci->i_head_snapc && (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { lock_snap_rwsem = true; if (!down_read_trylock(&mdsc->snap_rwsem)) { spin_unlock(&ci->i_ceph_lock); down_read(&mdsc->snap_rwsem); spin_lock(&ci->i_ceph_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, from_kuid(&init_user_ns, inode->i_uid), from_kuid(&init_user_ns, 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 || !uid_eq(attr->ia_uid, inode->i_uid)) { req->r_args.setattr.uid = cpu_to_le32( from_kuid(&init_user_ns, 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, from_kgid(&init_user_ns, inode->i_gid), from_kgid(&init_user_ns, 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 || !gid_eq(attr->ia_gid, inode->i_gid)) { req->r_args.setattr.gid = cpu_to_le32( from_kgid(&init_user_ns, 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) { inode->i_mode = attr->ia_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 %lld.%ld -> %lld.%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) && timespec64_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 || !timespec64_equal(&inode->i_atime, &attr->ia_atime)) { ceph_encode_timespec64(&req->r_args.setattr.atime, &attr->ia_atime); mask |= CEPH_SETATTR_ATIME; release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; } } if (ia_valid & ATTR_MTIME) { dout("setattr %p mtime %lld.%ld -> %lld.%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) && timespec64_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 || !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) { ceph_encode_timespec64(&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 ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size > inode->i_size) { i_size_write(inode, attr->ia_size); inode->i_blocks = calc_inode_blocks(attr->ia_size); 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_EXCL | 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 %lld.%ld -> %lld.%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"); 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) { inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, &prealloc_cf); inode->i_ctime = attr->ia_ctime; } release &= issued; spin_unlock(&ci->i_ceph_lock); if (lock_snap_rwsem) up_read(&mdsc->snap_rwsem); if (inode_dirty_flags) __mark_inode_dirty(inode, inode_dirty_flags); if (mask) { req->r_inode = inode; ihold(inode); req->r_inode_drop = release; req->r_args.setattr.mask = cpu_to_le32(mask); req->r_num_caps = 1; req->r_stamp = attr->ia_ctime; err = ceph_mdsc_do_request(mdsc, NULL, req); } dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, ceph_cap_string(dirtied), mask); ceph_mdsc_put_request(req); ceph_free_cap_flush(prealloc_cf); if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) __ceph_do_pending_vmtruncate(inode); return err; } /* * setattr */ int ceph_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = d_inode(dentry); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); int err; if (ceph_snap(inode) != CEPH_NOSNAP) return -EROFS; err = setattr_prepare(dentry, attr); if (err != 0) return err; if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > max(inode->i_size, fsc->max_file_size)) return -EFBIG; if ((attr->ia_valid & ATTR_SIZE) && ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) return -EDQUOT; err = __ceph_setattr(inode, attr); if (err >= 0 && (attr->ia_valid & ATTR_MODE)) err = posix_acl_chmod(inode, attr->ia_mode); 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, struct page *locked_page, int mask, bool force) { 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 mode; 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 (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) return 0; mode = (mask & CEPH_STAT_RSTAT) ? USE_AUTH_MDS : USE_ANY_MDS; req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); if (IS_ERR(req)) return PTR_ERR(req); req->r_inode = inode; ihold(inode); req->r_num_caps = 1; req->r_args.getattr.mask = cpu_to_le32(mask); req->r_locked_page = locked_page; err = ceph_mdsc_do_request(mdsc, NULL, req); if (locked_page && err == 0) { u64 inline_version = req->r_reply_info.targeti.inline_version; if (inline_version == 0) { /* the reply is supposed to contain inline data */ err = -EINVAL; } else if (inline_version == CEPH_INLINE_NONE) { err = -ENODATA; } else { err = req->r_reply_info.targeti.inline_len; } } 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; if (mask & MAY_NOT_BLOCK) return -ECHILD; err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); if (!err) err = generic_permission(inode, mask); 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(const struct path *path, struct kstat *stat, u32 request_mask, unsigned int flags) { struct inode *inode = d_inode(path->dentry); struct ceph_inode_info *ci = ceph_inode(inode); int err; err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false); if (!err) { generic_fillattr(inode, stat); stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); if (ceph_snap(inode) != CEPH_NOSNAP) stat->dev = ceph_snap(inode); else stat->dev = 0; if (S_ISDIR(inode->i_mode)) { if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), RBYTES)) stat->size = ci->i_rbytes; else stat->size = ci->i_files + ci->i_subdirs; stat->blocks = 0; stat->blksize = 65536; /* * Some applications rely on the number of st_nlink * value on directories to be either 0 (if unlinked) * or 2 + number of subdirectories. */ if (stat->nlink == 1) /* '.' + '..' + subdirs */ stat->nlink = 1 + 1 + ci->i_subdirs; } } return err; }