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authorChristoph Hellwig <hch@lst.de>2020-05-23 09:30:14 +0200
committerTheodore Ts'o <tytso@mit.edu>2020-06-03 23:16:55 -0400
commit45dd052e67ad17c7a24874a783f41aeab15bc294 (patch)
tree8babffcf81e916cbe3e5a21b7bace3a040c0e11d /fs/overlayfs
parentcddf8a2c4a8286ae60fc866eab59c8bc524e93a0 (diff)
downloadlinux-45dd052e67ad17c7a24874a783f41aeab15bc294.tar.bz2
fs: handle FIEMAP_FLAG_SYNC in fiemap_prep
By moving FIEMAP_FLAG_SYNC handling to fiemap_prep we ensure it is handled once instead of duplicated, but can still be done under fs locks, like xfs/iomap intended with its duplicate handling. Also make sure the error value of filemap_write_and_wait is propagated to user space. 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/20200523073016.2944131-8-hch@lst.de Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/overlayfs')
-rw-r--r--fs/overlayfs/inode.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index b5fec3410556..c7cb883c47b8 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -462,10 +462,6 @@ static int ovl_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
return -EOPNOTSUPP;
old_cred = ovl_override_creds(inode->i_sb);
-
- if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC)
- filemap_write_and_wait(realinode->i_mapping);
-
err = realinode->i_op->fiemap(realinode, fieinfo, start, len);
revert_creds(old_cred);