[PATCH 06/18] fs: make helpers idmap mount aware

Sebastian Huber sebastian.huber at embedded-brains.de
Wed Jan 11 11:58:40 UTC 2023

From: Christian Brauner <christian.brauner at ubuntu.com>

Extend some inode methods with an additional user namespace argument. A
filesystem that is aware of idmapped mounts will receive the user
namespace the mount has been marked with. This can be used for
additional permission checking and also to enable filesystems to
translate between uids and gids if they need to. We have implemented all
relevant helpers in earlier patches.

As requested we simply extend the exisiting inode method instead of
introducing new ones. This is a little more code churn but it's mostly
mechanical and doesnt't leave us with additional inode methods.

Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com
Cc: Christoph Hellwig <hch at lst.de>
Cc: David Howells <dhowells at redhat.com>
Cc: Al Viro <viro at zeniv.linux.org.uk>
Cc: linux-fsdevel at vger.kernel.org
Reviewed-by: Christoph Hellwig <hch at lst.de>
Signed-off-by: Christian Brauner <christian.brauner at ubuntu.com>
 cpukit/libfs/src/jffs2/src/acl.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cpukit/libfs/src/jffs2/src/acl.h b/cpukit/libfs/src/jffs2/src/acl.h
index 12d0271bdd..62c50da9d4 100644
--- a/cpukit/libfs/src/jffs2/src/acl.h
+++ b/cpukit/libfs/src/jffs2/src/acl.h
@@ -28,7 +28,8 @@ struct jffs2_acl_header {
 struct posix_acl *jffs2_get_acl(struct inode *inode, int type);
-int jffs2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
+int jffs2_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
+		  struct posix_acl *acl, int type);
 extern int jffs2_init_acl_pre(struct inode *, struct inode *, umode_t *);
 extern int jffs2_init_acl_post(struct inode *);

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