found_key.offset = 0;
inode = btrfs_iget(root->fs_info->sb, &found_key, root, NULL);
ret = PTR_ERR_OR_ZERO(inode);
- if (ret && ret != -ESTALE)
+ if (ret && ret != -ENOENT)
goto out;
- if (ret == -ESTALE && root == root->fs_info->tree_root) {
+ if (ret == -ENOENT && root == root->fs_info->tree_root) {
struct btrfs_root *dead_root;
struct btrfs_fs_info *fs_info = root->fs_info;
int is_dead_root = 0;
* Inode is already gone but the orphan item is still there,
* kill the orphan item.
*/
- if (ret == -ESTALE) {
+ if (ret == -ENOENT) {
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
/*
* read an inode from the btree into the in-memory inode
*/
-static void btrfs_read_locked_inode(struct inode *inode)
+static int btrfs_read_locked_inode(struct inode *inode)
{
struct btrfs_path *path;
struct extent_buffer *leaf;
filled = true;
path = btrfs_alloc_path();
- if (!path)
+ if (!path) {
+ ret = -ENOMEM;
goto make_bad;
+ }
memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
- if (ret)
+ if (ret) {
+ if (ret > 0)
+ ret = -ENOENT;
goto make_bad;
+ }
leaf = path->nodes[0];
}
btrfs_update_iflags(inode);
- return;
+ return 0;
make_bad:
btrfs_free_path(path);
make_bad_inode(inode);
+ return ret;
}
/*
int err = 0;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_trans_handle *trans;
+ u64 last_unlink_trans;
if (inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
if (err)
goto out;
+ last_unlink_trans = BTRFS_I(inode)->last_unlink_trans;
+
/* now the directory is empty */
err = btrfs_unlink_inode(trans, root, dir, d_inode(dentry),
dentry->d_name.name, dentry->d_name.len);
- if (!err)
+ if (!err) {
btrfs_i_size_write(inode, 0);
+ /*
+ * Propagate the last_unlink_trans value of the deleted dir to
+ * its parent directory. This is to prevent an unrecoverable
+ * log tree in the case we do something like this:
+ * 1) create dir foo
+ * 2) create snapshot under dir foo
+ * 3) delete the snapshot
+ * 4) rmdir foo
+ * 5) mkdir foo
+ * 6) fsync foo or some file inside foo
+ */
+ if (last_unlink_trans >= trans->transid)
+ BTRFS_I(dir)->last_unlink_trans = last_unlink_trans;
+ }
out:
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root);
return ERR_PTR(-ENOMEM);
if (inode->i_state & I_NEW) {
- btrfs_read_locked_inode(inode);
+ int ret;
+
+ ret = btrfs_read_locked_inode(inode);
if (!is_bad_inode(inode)) {
inode_tree_add(inode);
unlock_new_inode(inode);
} else {
unlock_new_inode(inode);
iput(inode);
- inode = ERR_PTR(-ESTALE);
+ ASSERT(ret < 0);
+ inode = ERR_PTR(ret < 0 ? ret : -ESTALE);
}
}
u64 parent_ino;
u64 ino;
u64 gen;
- bool is_orphan;
struct list_head update_refs;
};
char name[];
};
+static void inconsistent_snapshot_error(struct send_ctx *sctx,
+ enum btrfs_compare_tree_result result,
+ const char *what)
+{
+ const char *result_string;
+
+ switch (result) {
+ case BTRFS_COMPARE_TREE_NEW:
+ result_string = "new";
+ break;
+ case BTRFS_COMPARE_TREE_DELETED:
+ result_string = "deleted";
+ break;
+ case BTRFS_COMPARE_TREE_CHANGED:
+ result_string = "updated";
+ break;
+ case BTRFS_COMPARE_TREE_SAME:
+ ASSERT(0);
+ result_string = "unchanged";
+ break;
+ default:
+ ASSERT(0);
+ result_string = "unexpected";
+ }
+
+ btrfs_err(sctx->send_root->fs_info,
+ "Send: inconsistent snapshot, found %s %s for inode %llu without updated inode item, send root is %llu, parent root is %llu",
+ result_string, what, sctx->cmp_key->objectid,
+ sctx->send_root->root_key.objectid,
+ (sctx->parent_root ?
+ sctx->parent_root->root_key.objectid : 0));
+}
+
static int is_waiting_for_move(struct send_ctx *sctx, u64 ino);
static struct waiting_dir_move *
* was already unlinked/moved, so we can safely assume that we will not
* overwrite anything at this point in time.
*/
- if (other_inode > sctx->send_progress) {
+ if (other_inode > sctx->send_progress ||
+ is_waiting_for_move(sctx, other_inode)) {
ret = get_inode_info(sctx->parent_root, other_inode, NULL,
who_gen, NULL, NULL, NULL, NULL);
if (ret < 0)
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
ret = btrfs_search_slot(NULL, sctx->send_root, &key, path, 0, 0);
+ if (ret > 0)
+ ret = -ENOENT;
if (ret < 0)
goto out;
}
if (loc.objectid > send_progress) {
+ struct orphan_dir_info *odi;
+
+ odi = get_orphan_dir_info(sctx, dir);
+ free_orphan_dir_info(sctx, odi);
ret = 0;
goto out;
}
pm->parent_ino = parent_ino;
pm->ino = ino;
pm->gen = ino_gen;
- pm->is_orphan = is_orphan;
INIT_LIST_HEAD(&pm->list);
INIT_LIST_HEAD(&pm->update_refs);
RB_CLEAR_NODE(&pm->node);
return NULL;
}
+static int path_loop(struct send_ctx *sctx, struct fs_path *name,
+ u64 ino, u64 gen, u64 *ancestor_ino)
+{
+ int ret = 0;
+ u64 parent_inode = 0;
+ u64 parent_gen = 0;
+ u64 start_ino = ino;
+
+ *ancestor_ino = 0;
+ while (ino != BTRFS_FIRST_FREE_OBJECTID) {
+ fs_path_reset(name);
+
+ if (is_waiting_for_rm(sctx, ino))
+ break;
+ if (is_waiting_for_move(sctx, ino)) {
+ if (*ancestor_ino == 0)
+ *ancestor_ino = ino;
+ ret = get_first_ref(sctx->parent_root, ino,
+ &parent_inode, &parent_gen, name);
+ } else {
+ ret = __get_cur_name_and_parent(sctx, ino, gen,
+ &parent_inode,
+ &parent_gen, name);
+ if (ret > 0) {
+ ret = 0;
+ break;
+ }
+ }
+ if (ret < 0)
+ break;
+ if (parent_inode == start_ino) {
+ ret = 1;
+ if (*ancestor_ino == 0)
+ *ancestor_ino = ino;
+ break;
+ }
+ ino = parent_inode;
+ gen = parent_gen;
+ }
+ return ret;
+}
+
static int apply_dir_move(struct send_ctx *sctx, struct pending_dir_move *pm)
{
struct fs_path *from_path = NULL;
u64 parent_ino, parent_gen;
struct waiting_dir_move *dm = NULL;
u64 rmdir_ino = 0;
+ u64 ancestor;
+ bool is_orphan;
int ret;
name = fs_path_alloc();
dm = get_waiting_dir_move(sctx, pm->ino);
ASSERT(dm);
rmdir_ino = dm->rmdir_ino;
+ is_orphan = dm->orphanized;
free_waiting_dir_move(sctx, dm);
- if (pm->is_orphan) {
+ if (is_orphan) {
ret = gen_unique_name(sctx, pm->ino,
pm->gen, from_path);
} else {
goto out;
sctx->send_progress = sctx->cur_ino + 1;
+ ret = path_loop(sctx, name, pm->ino, pm->gen, &ancestor);
+ if (ret < 0)
+ goto out;
+ if (ret) {
+ LIST_HEAD(deleted_refs);
+ ASSERT(ancestor > BTRFS_FIRST_FREE_OBJECTID);
+ ret = add_pending_dir_move(sctx, pm->ino, pm->gen, ancestor,
+ &pm->update_refs, &deleted_refs,
+ is_orphan);
+ if (ret < 0)
+ goto out;
+ if (rmdir_ino) {
+ dm = get_waiting_dir_move(sctx, pm->ino);
+ ASSERT(dm);
+ dm->rmdir_ino = rmdir_ino;
+ }
+ goto out;
+ }
fs_path_reset(name);
to_path = name;
name = NULL;
/* already deleted */
goto finish;
}
- ret = can_rmdir(sctx, rmdir_ino, odi->gen, sctx->cur_ino + 1);
+ ret = can_rmdir(sctx, rmdir_ino, odi->gen, sctx->cur_ino);
if (ret < 0)
goto out;
if (!ret)
* and old parent(s).
*/
list_for_each_entry(cur, &pm->update_refs, list) {
- if (cur->dir == rmdir_ino)
+ /*
+ * The parent inode might have been deleted in the send snapshot
+ */
+ ret = get_inode_info(sctx->send_root, cur->dir, NULL,
+ NULL, NULL, NULL, NULL, NULL);
+ if (ret == -ENOENT) {
+ ret = 0;
continue;
+ }
+ if (ret < 0)
+ goto out;
+
ret = send_utimes(sctx, cur->dir, cur->dir_gen);
if (ret < 0)
goto out;
u64 left_gen;
u64 right_gen;
int ret = 0;
+ struct waiting_dir_move *wdm;
if (RB_EMPTY_ROOT(&sctx->waiting_dir_moves))
return 0;
goto out;
}
- if (is_waiting_for_move(sctx, di_key.objectid)) {
+ wdm = get_waiting_dir_move(sctx, di_key.objectid);
+ if (wdm && !wdm->orphanized) {
ret = add_pending_dir_move(sctx,
sctx->cur_ino,
sctx->cur_inode_gen,
ret = is_ancestor(sctx->parent_root,
sctx->cur_ino, sctx->cur_inode_gen,
ino, path_before);
- break;
+ if (ret)
+ break;
}
fs_path_reset(path_before);
goto out;
if (ret) {
struct name_cache_entry *nce;
+ struct waiting_dir_move *wdm;
ret = orphanize_inode(sctx, ow_inode, ow_gen,
cur->full_path);
if (ret < 0)
goto out;
+
+ /*
+ * If ow_inode has its rename operation delayed
+ * make sure that its orphanized name is used in
+ * the source path when performing its rename
+ * operation.
+ */
+ if (is_waiting_for_move(sctx, ow_inode)) {
+ wdm = get_waiting_dir_move(sctx,
+ ow_inode);
+ ASSERT(wdm);
+ wdm->orphanized = true;
+ }
+
/*
* Make sure we clear our orphanized inode's
* name from the name cache. This is because the
name_cache_delete(sctx, nce);
kfree(nce);
}
+
+ /*
+ * ow_inode might currently be an ancestor of
+ * cur_ino, therefore compute valid_path (the
+ * current path of cur_ino) again because it
+ * might contain the pre-orphanization name of
+ * ow_inode, which is no longer valid.
+ */
+ fs_path_reset(valid_path);
+ ret = get_cur_path(sctx, sctx->cur_ino,
+ sctx->cur_inode_gen, valid_path);
+ if (ret < 0)
+ goto out;
} else {
ret = send_unlink(sctx, cur->full_path);
if (ret < 0)
{
int ret = 0;
- BUG_ON(sctx->cur_ino != sctx->cmp_key->objectid);
+ if (sctx->cur_ino != sctx->cmp_key->objectid) {
+ inconsistent_snapshot_error(sctx, result, "reference");
+ return -EIO;
+ }
if (!sctx->cur_inode_new_gen &&
sctx->cur_ino != BTRFS_FIRST_FREE_OBJECTID) {
{
int ret = 0;
- BUG_ON(sctx->cur_ino != sctx->cmp_key->objectid);
+ if (sctx->cur_ino != sctx->cmp_key->objectid) {
+ inconsistent_snapshot_error(sctx, result, "xattr");
+ return -EIO;
+ }
if (!sctx->cur_inode_new_gen && !sctx->cur_inode_deleted) {
if (result == BTRFS_COMPARE_TREE_NEW)
{
int ret = 0;
- BUG_ON(sctx->cur_ino != sctx->cmp_key->objectid);
+ if (sctx->cur_ino != sctx->cmp_key->objectid) {
+ inconsistent_snapshot_error(sctx, result, "extent");
+ return -EIO;
+ }
if (!sctx->cur_inode_new_gen && !sctx->cur_inode_deleted) {
if (result != BTRFS_COMPARE_TREE_DELETED)
static int btrfs_check_ref_name_override(struct extent_buffer *eb,
const int slot,
const struct btrfs_key *key,
- struct inode *inode)
+ struct inode *inode,
+ u64 *other_ino)
{
int ret;
struct btrfs_path *search_path;
search_path, parent,
name, this_name_len, 0);
if (di && !IS_ERR(di)) {
- ret = 1;
+ struct btrfs_key di_key;
+
+ btrfs_dir_item_key_to_cpu(search_path->nodes[0],
+ di, &di_key);
+ if (di_key.type == BTRFS_INODE_ITEM_KEY) {
+ ret = 1;
+ *other_ino = di_key.objectid;
+ } else {
+ ret = -EAGAIN;
+ }
goto out;
} else if (IS_ERR(di)) {
ret = PTR_ERR(di);
if ((min_key.type == BTRFS_INODE_REF_KEY ||
min_key.type == BTRFS_INODE_EXTREF_KEY) &&
BTRFS_I(inode)->generation == trans->transid) {
+ u64 other_ino = 0;
+
ret = btrfs_check_ref_name_override(path->nodes[0],
path->slots[0],
- &min_key, inode);
+ &min_key, inode,
+ &other_ino);
if (ret < 0) {
err = ret;
goto out_unlock;
} else if (ret > 0) {
- err = 1;
- btrfs_set_log_full_commit(root->fs_info, trans);
- goto out_unlock;
+ struct btrfs_key inode_key;
+ struct inode *other_inode;
+
+ if (ins_nr > 0) {
+ ins_nr++;
+ } else {
+ ins_nr = 1;
+ ins_start_slot = path->slots[0];
+ }
+ ret = copy_items(trans, inode, dst_path, path,
+ &last_extent, ins_start_slot,
+ ins_nr, inode_only,
+ logged_isize);
+ if (ret < 0) {
+ err = ret;
+ goto out_unlock;
+ }
+ ins_nr = 0;
+ btrfs_release_path(path);
+ inode_key.objectid = other_ino;
+ inode_key.type = BTRFS_INODE_ITEM_KEY;
+ inode_key.offset = 0;
+ other_inode = btrfs_iget(root->fs_info->sb,
+ &inode_key, root,
+ NULL);
+ /*
+ * If the other inode that had a conflicting dir
+ * entry was deleted in the current transaction,
+ * we don't need to do more work nor fallback to
+ * a transaction commit.
+ */
+ if (IS_ERR(other_inode) &&
+ PTR_ERR(other_inode) == -ENOENT) {
+ goto next_key;
+ } else if (IS_ERR(other_inode)) {
+ err = PTR_ERR(other_inode);
+ goto out_unlock;
+ }
+ /*
+ * We are safe logging the other inode without
+ * acquiring its i_mutex as long as we log with
+ * the LOG_INODE_EXISTS mode. We're safe against
+ * concurrent renames of the other inode as well
+ * because during a rename we pin the log and
+ * update the log with the new name before we
+ * unpin it.
+ */
+ err = btrfs_log_inode(trans, root, other_inode,
+ LOG_INODE_EXISTS,
+ 0, LLONG_MAX, ctx);
+ iput(other_inode);
+ if (err)
+ goto out_unlock;
+ else
+ goto next_key;
}
}
ins_nr = 0;
}
btrfs_release_path(path);
-
+next_key:
if (min_key.offset < (u64)-1) {
min_key.offset++;
} else if (min_key.type < max_key.type) {
if (!parent || d_really_is_negative(parent) || sb != parent->d_sb)
break;
- if (IS_ROOT(parent))
+ if (IS_ROOT(parent)) {
+ inode = d_inode(parent);
+ if (btrfs_must_commit_transaction(trans, inode))
+ ret = 1;
break;
+ }
parent = dget_parent(parent);
dput(old_parent);
projects / deliverable / linux.git / commitdiff
