From 6c459b78d4793afbba6d864c466cc5cd2932459d Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Tue, 17 May 2022 18:41:03 +0800 Subject: erofs: support idmapped mounts This patch enables idmapped mounts for erofs, since all dedicated helpers for this functionality existsm, so, in this patch we just pass down the user_namespace argument from the VFS methods to the relevant helpers. Simple idmap example on erofs image: 1. mkdir dir 2. touch dir/file 3. mkfs.erofs erofs.img dir 4. mount -t erofs -o loop erofs.img /mnt/erofs/ 5. ls -ln /mnt/erofs/ total 0 -rw-rw-r-- 1 1000 1000 0 May 17 15:26 file 6. mount-idmapped --map-mount b:1000:1001:1 /mnt/erofs/ /mnt/scratch_erofs/ 7. ls -ln /mnt/scratch_erofs/ total 0 -rw-rw-r-- 1 1001 1001 0 May 17 15:26 file Reviewed-by: Christian Brauner (Microsoft) Reviewed-by: Gao Xiang Signed-off-by: Chao Yu Link: https://lore.kernel.org/r/20220517104103.3570721-1-chao@kernel.org Signed-off-by: Gao Xiang --- fs/erofs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/erofs/inode.c') diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 4b2b1f357972..6c28ed75dc82 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -365,7 +365,7 @@ int erofs_getattr(struct user_namespace *mnt_userns, const struct path *path, stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_IMMUTABLE); - generic_fillattr(&init_user_ns, inode, stat); + generic_fillattr(mnt_userns, inode, stat); return 0; } -- cgit v1.2.3