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[v2,22/39] utimes: handle idmapped mounts

Message ID 20201115103718.298186-23-christian.brauner@ubuntu.com (mailing list archive)
State New, archived
Headers show
Series fs: idmapped mounts | expand

Commit Message

Christian Brauner Nov. 15, 2020, 10:37 a.m. UTC 
Enable the vfs_utimes() helper to handle idmapped mounts by passing down
the mount's user namespace.

Cc: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
/* v2 */
unchanged
---
 fs/utimes.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/utimes.c b/fs/utimes.c
index 1a4130bee157..ead17d623aaa 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -22,6 +22,7 @@  int vfs_utimes(const struct path *path, struct timespec64 *times)
 	struct iattr newattrs;
 	struct inode *inode = path->dentry->d_inode;
 	struct inode *delegated_inode = NULL;
+	struct user_namespace *user_ns;
 
 	if (times) {
 		if (!nsec_valid(times[0].tv_nsec) ||
@@ -61,8 +62,9 @@  int vfs_utimes(const struct path *path, struct timespec64 *times)
 		newattrs.ia_valid |= ATTR_TOUCH;
 	}
 retry_deleg:
+	user_ns = mnt_user_ns(path->mnt);
 	inode_lock(inode);
-	error = notify_change(&init_user_ns, path->dentry, &newattrs, &delegated_inode);
+	error = notify_change(user_ns, path->dentry, &newattrs, &delegated_inode);
 	inode_unlock(inode);
 	if (delegated_inode) {
 		error = break_deleg_wait(&delegated_inode);