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authorQu Wenruo <wqu@suse.com>2024-01-29 20:16:06 +1030
committerDavid Sterba <dsterba@suse.com>2024-05-07 21:31:02 +0200
commit6de3595473b0bae11102ef6db40e6f2334f13ed2 (patch)
treeeda606a551da51c5cb017e94ecb6683cc25a332a /fs/btrfs/compression.h
parent5d6f0e9890ed857a0bafb7fa73c85bf49bbe1e14 (diff)
btrfs: compression: add error handling for missed page cache
For all the supported compression algorithms, the compression path would always need to grab the page cache, then do the compression. Normally we would get a page reference without any problem, since the write path should have already locked the pages in the write range. For the sake of error handling, we should handle the page cache miss case. Adds a common wrapper, btrfs_compress_find_get_page(), which calls find_get_page(), and do the error handling along with an error message. Callers inside compression path would only need to call btrfs_compress_find_get_page(), and error out if it returned any error. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
-rw-r--r--fs/btrfs/compression.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index 4691a84ca838..7590dc86d040 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -149,6 +149,9 @@ bool btrfs_compress_is_valid_type(const char *str, size_t len);
int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end);
+int btrfs_compress_find_get_page(struct address_space *mapping, u64 start,
+ struct page **in_page_ret);
+
int zlib_compress_pages(struct list_head *ws, struct address_space *mapping,
u64 start, struct page **pages, unsigned long *out_pages,
unsigned long *total_in, unsigned long *total_out);