From 2f19cad94cee3c9bd52d0c9ca584ef506302fb7c Mon Sep 17 00:00:00 2001
From: Chris Mason <clm@fb.com>
Date: Sun, 30 Nov 2014 08:56:33 -0500
Subject: btrfs: zero out left over bytes after processing compression streams
Don Bailey noticed that our page zeroing for compression at end-io time
isn't complete. This reworks a patch from Linus to push the zeroing
into the zlib and lzo specific functions instead of trying to handle the
corners inside btrfs_decompress_buf2page
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reported-by: Don A. Bailey <donb@securitymouse.com>
cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/btrfs/compression.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(limited to 'fs/btrfs/compression.h')
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index 0c803b4fbf9..d181f70caae 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -45,7 +45,9 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
unsigned long nr_pages);
int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags);
-
+void btrfs_clear_biovec_end(struct bio_vec *bvec, int vcnt,
+ unsigned long pg_index,
+ unsigned long pg_offset);
struct btrfs_compress_op {
struct list_head *(*alloc_workspace)(void);
--
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