path: root/fs/fcntl.c
diff options
authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 14:19:38 +0100
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 14:27:19 +0100
commit9eccd12ce7f1c063a5ff03d8b8456b2b9761c6b6 (patch)
treeb1615c0b86f989d8730ff1a111f59d3566556a17 /fs/fcntl.c
parentutimes: handle idmapped mounts (diff)
fcntl: handle idmapped mounts
Enable the setfl() helper to handle idmapped mounts by passing down the mount's user namespace. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-20-christian.brauner@ubuntu.com 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 Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jamorris@linux.microsoft.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'fs/fcntl.c')
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 74d99731fd43..f6ac5285060d 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -25,6 +25,7 @@
#include <linux/user_namespace.h>
#include <linux/memfd.h>
#include <linux/compat.h>
+#include <linux/mount.h>
#include <linux/poll.h>
#include <asm/siginfo.h>
@@ -46,7 +47,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
/* O_NOATIME can only be set by the owner or superuser */
if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME))
- if (!inode_owner_or_capable(&init_user_ns, inode))
+ if (!inode_owner_or_capable(file_mnt_user_ns(filp), inode))
return -EPERM;
/* required for strict SunOS emulation */