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authorChristoph Hellwig <hch@lst.de>2020-05-23 09:30:13 +0200
committerTheodore Ts'o <tytso@mit.edu>2020-06-03 23:16:55 -0400
commitcddf8a2c4a8286ae60fc866eab59c8bc524e93a0 (patch)
treec3f18f1243c85c5f3d67aa2d4f7afc44f3feccb8 /fs/cifs
parent2732881894714f545ffac42dad7ba7730069874d (diff)
downloadlinux-cddf8a2c4a8286ae60fc866eab59c8bc524e93a0.tar.bz2
fs: move fiemap range validation into the file systems instances
Replace fiemap_check_flags with a fiemap_prep helper that also takes the inode and mapped range, and performs the sanity check and truncation previously done in fiemap_check_range. This way the validation is inside the file system itself and thus properly works for the stacked overlayfs case as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Link: https://lore.kernel.org/r/20200523073016.2944131-7-hch@lst.de Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/smb2ops.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 09047f1ddfb6..828e53e795c6 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -3408,8 +3408,10 @@ static int smb3_fiemap(struct cifs_tcon *tcon,
int i, num, rc, flags, last_blob;
u64 next;
- if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
- return -EBADR;
+ rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len,
+ FIEMAP_FLAG_SYNC);
+ if (rc)
+ return rc;
xid = get_xid();
again: