linux/fs/adfs
Christian Brauner 2f221d6f7b
attr: handle idmapped mounts
When file attributes are changed most filesystems rely on the
setattr_prepare(), setattr_copy(), and notify_change() helpers for
initialization and permission checking. Let them handle idmapped mounts.
If the inode is accessed through an idmapped mount map it into the
mount's user namespace. Afterwards the checks 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.

Helpers that perform checks on the ia_uid and ia_gid fields in struct
iattr assume that ia_uid and ia_gid are intended values and have already
been mapped correctly at the userspace-kernelspace boundary as we
already do today. 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/20210121131959.646623-8-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>
2021-01-24 14:27:16 +01:00
..
adfs.h fs/adfs: mostly divorse inode number from indirect disc address 2020-01-20 20:12:42 -05:00
dir_f.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
dir_f.h fs/adfs: dir: modernise on-disk directory structures 2020-01-20 20:12:41 -05:00
dir_fplus.c fs/adfs: bigdir: Fix an error code in adfs_fplus_read() 2020-01-25 11:31:59 -05:00
dir_fplus.h fs/adfs: dir: modernise on-disk directory structures 2020-01-20 20:12:41 -05:00
dir.c fs/adfs: mostly divorse inode number from indirect disc address 2020-01-20 20:12:42 -05:00
file.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
inode.c attr: handle idmapped mounts 2021-01-24 14:27:16 +01:00
Kconfig docs: filesystems: fix renamed references 2020-04-20 15:45:22 -06:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
map.c fs/adfs: map: fix map scanning 2020-01-20 20:12:40 -05:00
super.c [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00