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authorTsutomu Itoh <t-itoh@jp.fujitsu.com>2012-11-29 05:08:26 +0000
committerChris Mason <chris.mason@fusionio.com>2012-12-16 20:46:16 -0500
commit05dadc09f52ad5a631da1aa8767c5b80e121f0c4 (patch)
tree291dd56862b5f58f5c64b01ec7797212206bf26c
parent01e6deb25ae11e7b85484bf5e550eb540c50c63e (diff)
downloadop-kernel-dev-05dadc09f52ad5a631da1aa8767c5b80e121f0c4.zip
op-kernel-dev-05dadc09f52ad5a631da1aa8767c5b80e121f0c4.tar.gz
Btrfs: add fiemap's flag check
When the flag not supported is specified, it is necessary to return the error to the caller. So, we add the validity check of the fiemap's flag. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
-rw-r--r--fs/btrfs/inode.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d7bf2e7..a1761f0 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6595,9 +6595,17 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
btrfs_submit_direct, 0);
}
+#define BTRFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC)
+
static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len)
{
+ int ret;
+
+ ret = fiemap_check_flags(fieinfo, BTRFS_FIEMAP_FLAGS);
+ if (ret)
+ return ret;
+
return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent_fiemap);
}
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