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authorAmir Goldstein <amir73il@gmail.com>2019-06-10 19:36:57 +0200
committerSteve French <stfrench@microsoft.com>2019-07-18 21:03:03 +0200
commitbf3c90ee1efe4dd3417d2129f9f6c68a4c76de00 (patch)
treecea2317aa589975e3a9f94b75ef292f1d5912717 /fs
parentCIFS: fix deadlock in cached root handling (diff)
downloadlinux-bf3c90ee1efe4dd3417d2129f9f6c68a4c76de00.tar.xz
linux-bf3c90ee1efe4dd3417d2129f9f6c68a4c76de00.zip
cifs: copy_file_range needs to strip setuid bits and update timestamps
cifs has both source and destination inodes locked throughout the copy. Like ->write_iter(), we update mtime and strip setuid bits of destination file before copy and like ->read_iter(), we update atime of source file after copy. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifsfs.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 270d3c58fb3b..3289b566463f 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1104,6 +1104,10 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
goto out;
}
+ rc = -EOPNOTSUPP;
+ if (!target_tcon->ses->server->ops->copychunk_range)
+ goto out;
+
/*
* Note: cifs case is easier than btrfs since server responsible for
* checks for proper open modes and file type and if it wants
@@ -1115,11 +1119,12 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
/* should we flush first and last page first */
truncate_inode_pages(&target_inode->i_data, 0);
- if (target_tcon->ses->server->ops->copychunk_range)
+ rc = file_modified(dst_file);
+ if (!rc)
rc = target_tcon->ses->server->ops->copychunk_range(xid,
smb_file_src, smb_file_target, off, len, destoff);
- else
- rc = -EOPNOTSUPP;
+
+ file_accessed(src_file);
/* force revalidate of size and timestamps of target file now
* that target is updated on the server