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| author | Jeff Mahoney <jeffm@suse.com> | 2012-03-01 14:56:27 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2012-03-22 01:45:31 +0100 |
| commit | d5c13f927fe77b11a67f79559808c68b26474c77 (patch) | |
| tree | 4725c8b83309fa8431fea85bf9acc99b8e015291 | |
| parent | d16cb050e5b1c3a9d754fed7098eefb8237877d1 (diff) | |
| download | blackbird-op-linux-d5c13f927fe77b11a67f79559808c68b26474c77.tar.gz blackbird-op-linux-d5c13f927fe77b11a67f79559808c68b26474c77.zip | |
btrfs: clean_tree_block should panic on observed memory corruption and return void
The only error condition in clean_tree_block is an accounting bug.
Returning without modifying dirty_metadata_bytes and as if the cleaning
as been performed may cause problems later so it should panic instead.
It should probably be a BUG_ON but we have btrfs_panic now.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
| -rw-r--r-- | fs/btrfs/disk-io.c | 15 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.h | 4 |
2 files changed, 12 insertions, 7 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 534266fe505f..d52ec1155204 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1109,8 +1109,8 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, } -int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct extent_buffer *buf) +void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct extent_buffer *buf) { struct inode *btree_inode = root->fs_info->btree_inode; if (btrfs_header_generation(buf) == @@ -1121,8 +1121,14 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, spin_lock(&root->fs_info->delalloc_lock); if (root->fs_info->dirty_metadata_bytes >= buf->len) root->fs_info->dirty_metadata_bytes -= buf->len; - else - WARN_ON(1); + else { + spin_unlock(&root->fs_info->delalloc_lock); + btrfs_panic(root->fs_info, -EOVERFLOW, + "Can't clear %lu bytes from " + " dirty_mdatadata_bytes (%lu)", + buf->len, + root->fs_info->dirty_metadata_bytes); + } spin_unlock(&root->fs_info->delalloc_lock); } @@ -1131,7 +1137,6 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, buf); } - return 0; } static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index e4bc4741319b..ca34237ae384 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -44,8 +44,8 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, int mirror_num, struct extent_buffer **eb); struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize); -int clean_tree_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct extent_buffer *buf); +void clean_tree_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *buf); int open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices, char *options); |
