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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Browse source 
Pull btrfs fixes from Chris Mason:
 "Eric's rcu barrier patch fixes a long standing problem with our
  unmount code hanging on to devices in workqueue helpers.  Liu Bo
  nailed down a difficult assertion for in-memory extent mappings."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix warning of free_extent_map
  Btrfs: fix warning when creating snapshots
  Btrfs: return as soon as possible when edquot happens
  Btrfs: return EIO if we have extent tree corruption
  btrfs: use rcu_barrier() to wait for bdev puts at unmount
  Btrfs: remove btrfs_try_spin_lock
  Btrfs: get better concurrency for snapshot-aware defrag work
This commit is contained in:
Linus Torvalds 2013-03-17 11:04:14 -07:00
commit 08637024ab
7 changed files with 25 additions and 12 deletions
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5
fs/btrfs/extent-tree.c
View file

@ -1467,8 +1467,11 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
if (ret && !insert) {
err = -ENOENT;
goto out;
} else if (ret) {
err = -EIO;
WARN_ON(1);
goto out;
}
BUG_ON(ret); /* Corruption */
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);

1
fs/btrfs/file.c
View file

@ -591,6 +591,7 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
}
compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
clear_bit(EXTENT_FLAG_PINNED, &em->flags);
clear_bit(EXTENT_FLAG_LOGGING, &flags);
remove_extent_mapping(em_tree, em);
if (no_splits)
goto next;

3
fs/btrfs/inode.c
View file

@ -2312,6 +2312,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = start;
path->leave_spinning = 1;
if (merge) {
struct btrfs_file_extent_item *fi;
u64 extent_len;
@ -2368,6 +2369,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
btrfs_mark_buffer_dirty(leaf);
inode_add_bytes(inode, len);
btrfs_release_path(path);
ret = btrfs_inc_extent_ref(trans, root, new->bytenr,
new->disk_len, 0,
@ -2381,6 +2383,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
ret = 1;
out_free_path:
btrfs_release_path(path);
path->leave_spinning = 0;
btrfs_end_transaction(trans, root);
out_unlock:
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lock_start, lock_end,

1
fs/btrfs/locking.h
View file

@ -26,7 +26,6 @@
void btrfs_tree_lock(struct extent_buffer *eb);
void btrfs_tree_unlock(struct extent_buffer *eb);
int btrfs_try_spin_lock(struct extent_buffer *eb);
void btrfs_tree_read_lock(struct extent_buffer *eb);
void btrfs_tree_read_unlock(struct extent_buffer *eb);

10
fs/btrfs/qgroup.c
View file

@ -1525,21 +1525,23 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) &&
qg->reserved + qg->rfer + num_bytes >
qg->max_rfer)
qg->max_rfer) {
ret = -EDQUOT;
goto out;
}
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) &&
qg->reserved + qg->excl + num_bytes >
qg->max_excl)
qg->max_excl) {
ret = -EDQUOT;
goto out;
}
list_for_each_entry(glist, &qg->groups, next_group) {
ulist_add(ulist, glist->group->qgroupid,
(uintptr_t)glist->group, GFP_ATOMIC);
}
}
if (ret)
goto out;
/*
* no limits exceeded, now record the reservation into all qgroups

11
fs/btrfs/transaction.c
View file

@ -625,14 +625,13 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
/*
* the same root has to be passed to start_transaction and
* end_transaction. Subvolume quota depends on this.
*/
WARN_ON(trans->root != root);
if (trans->qgroup_reserved) {
btrfs_qgroup_free(root, trans->qgroup_reserved);
/*
* the same root has to be passed here between start_transaction
* and end_transaction. Subvolume quota depends on this.
*/
btrfs_qgroup_free(trans->root, trans->qgroup_reserved);
trans->qgroup_reserved = 0;
}

6
fs/btrfs/volumes.c
View file

@ -684,6 +684,12 @@ int btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
__btrfs_close_devices(fs_devices);
free_fs_devices(fs_devices);
}
/*
* Wait for rcu kworkers under __btrfs_close_devices
* to finish all blkdev_puts so device is really
* free when umount is done.
*/
rcu_barrier();
return ret;
}