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authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 14:19:33 +0100
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 14:27:18 +0100
commit6521f8917082928a4cb637eb64b77b5f2f5b30fc (patch)
treeece638b5b444e7aff9e6e132d7c0c16788d7583e /net/unix
parent9fe61450972d3900bffb1dc26a17ebb9cdd92db2 (diff)
downloadlinux-6521f8917082928a4cb637eb64b77b5f2f5b30fc.tar.bz2
namei: prepare for idmapped mounts
The various vfs_*() helpers are called by filesystems or by the vfs itself to perform core operations such as create, link, mkdir, mknod, rename, rmdir, tmpfile and unlink. Enable them to handle idmapped mounts. If the inode is accessed through an idmapped mount map it into the mount's user namespace and pass it down. Afterwards the checks and operations are identical to non-idmapped mounts. 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/20210121131959.646623-15-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> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'net/unix')
-rw-r--r--net/unix/af_unix.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 18453d15dddf..9a1f3c04402e 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -996,7 +996,8 @@ static int unix_mknod(const char *sun_path, umode_t mode, struct path *res)
*/
err = security_path_mknod(&path, dentry, mode, 0);
if (!err) {
- err = vfs_mknod(d_inode(path.dentry), dentry, mode, 0);
+ err = vfs_mknod(&init_user_ns, d_inode(path.dentry), dentry,
+ mode, 0);
if (!err) {
res->mnt = mntget(path.mnt);
res->dentry = dget(dentry);