From 5b9b26f5d0b88b74001dcfe4ab8a8f2f4e744112 Mon Sep 17 00:00:00 2001 From: Christian Brauner Date: Tue, 27 Jul 2021 12:48:59 +0200 Subject: [PATCH] btrfs: allow idmapped mount Now that we converted btrfs internally to account for idmapped mounts allow the creation of idmapped mounts on by setting the FS_ALLOW_IDMAP flag. We only need to raise this flag on the btrfs_root_fs_type filesystem since btrfs_mount_root() is ultimately responsible for allocating the superblock and is called into from btrfs_mount() associated with btrfs_fs_type. The conversion of the btrfs inode operations was straightforward. Regarding btrfs specific ioctls that perform checks based on inode permissions only those have been allowed that are not filesystem wide operations and hence can be reasonably charged against a specific mount. Reviewed-by: Josef Bacik Signed-off-by: Christian Brauner Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 409bee3e..537d90b 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -2362,7 +2362,7 @@ static struct file_system_type btrfs_root_fs_type = { .name = "btrfs", .mount = btrfs_mount_root, .kill_sb = btrfs_kill_super, - .fs_flags = FS_REQUIRES_DEV | FS_BINARY_MOUNTDATA, + .fs_flags = FS_REQUIRES_DEV | FS_BINARY_MOUNTDATA | FS_ALLOW_IDMAP, }; MODULE_ALIAS_FS("btrfs"); -- 2.7.4