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| author |   Mark Fasheh <mfasheh@suse.com> | 2011-08-08 13:20:18 -0700 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.cz> | 2012-03-22 01:45:36 +0100 |
| commit | be1a5564fd39fa2ca6adbb41c75fb08f96a1ffcb (patch) | |
| tree | de88d181ecbdcb130343116d7a6f71bbbc4a7e1a /fs/btrfs | |
| parent | btrfs: Don't BUG_ON errors from btrfs_create_subvol_root() (diff) | |
| download | linux-dev-be1a5564fd39fa2ca6adbb41c75fb08f96a1ffcb.tar.xz linux-dev-be1a5564fd39fa2ca6adbb41c75fb08f96a1ffcb.zip | |
btrfs: Don't BUG_ON() errors in update_ref_for_cow()
The only caller of update_ref_for_cow() is __btrfs_cow_block() which was
originally ignoring any return values. update_ref_for_cow() however doesn't
look like a candidate to become a void function - there are a few places
where errors can occur.
So instead I changed update_ref_for_cow() to bubble all errors up (instead
of BUG_ON). __btrfs_cow_block() was then updated to catch and BUG_ON() any
errors from update_ref_for_cow(). The end effect is that we have no change
in behavior, but about 8 different places where a BUG_ON(ret) was removed.
Obviously a future patch will have to address the BUG_ON() in
__btrfs_cow_block().
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ctree.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 9d472c2a8de8..e2e43c07f6b1 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -331,7 +331,8 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, if (btrfs_block_can_be_shared(root, buf)) { ret = btrfs_lookup_extent_info(trans, root, buf->start, buf->len, &refs, &flags); - BUG_ON(ret); + if (ret) + return ret; BUG_ON(refs == 0); } else { refs = 1; @@ -375,7 +376,8 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, buf->start, buf->len, new_flags, 0); - BUG_ON(ret); + if (ret) + return ret; } } else { if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) { @@ -415,7 +417,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, { struct btrfs_disk_key disk_key; struct extent_buffer *cow; - int level; + int level, ret; int last_ref = 0; int unlock_orig = 0; u64 parent_start; @@ -467,7 +469,8 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, (unsigned long)btrfs_header_fsid(cow), BTRFS_FSID_SIZE); - update_ref_for_cow(trans, root, buf, cow, &last_ref); + ret = update_ref_for_cow(trans, root, buf, cow, &last_ref); + BUG_ON(ret); if (root->ref_cows) btrfs_reloc_cow_block(trans, root, buf, cow); |