Btrfs: fix off-by-one in cow_file_range_inline()

Btrfs could still inline file data if its size is same as
page size, so don't skip max value here.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
(cherry picked from commit 354877befa852e9b62ddc92a6cc017210e982d46)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 67c0f7f53ef172bf359d70773007bf49a30fb365..3a3ba5f3483ac4fb48c54bcf2231e76491f539bc 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -249,8 +249,8 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
                data_len = compressed_size;
 
        if (start > 0 ||
-           actual_end >= PAGE_CACHE_SIZE ||
-           data_len >= BTRFS_MAX_INLINE_DATA_SIZE(root) ||
+           actual_end > PAGE_CACHE_SIZE ||
+           data_len > BTRFS_MAX_INLINE_DATA_SIZE(root) ||
            (!compressed_size &&
            (actual_end & (root->sectorsize - 1)) == 0) ||
            end + 1 < isize ||