From: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Date: Thu, 21 Jan 2016 10:26:01 +0000 (+0530)
Subject: Btrfs: Limit inline extents to root->sectorsize
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0c29ba993e4b08771deb20f8717a4b57cc7e678b;p=deliverable%2Flinux.git

Btrfs: Limit inline extents to root->sectorsize

cow_file_range_inline() limits the size of an inline extent to
PAGE_CACHE_SIZE. This breaks in subpagesize-blocksize scenarios. Fix this by
comparing against root->sectorsize.

Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 9dd4fb4afce9..7cda82006de9 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -263,7 +263,7 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
 		data_len = compressed_size;
 
 	if (start > 0 ||
-	    actual_end > PAGE_CACHE_SIZE ||
+	    actual_end > root->sectorsize ||
 	    data_len > BTRFS_MAX_INLINE_DATA_SIZE(root) ||
 	    (!compressed_size &&
 	    (actual_end & (root->sectorsize - 1)) == 0) ||