linux/fs/hfs
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
..
attr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bfind.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bitmap.c
bnode.c hfs/hfsplus: clean up unused variables in bnode.c 2017-11-17 16:10:03 -08:00
brec.c hfs: fix BUG on bnode parent update 2018-10-31 08:54:13 -07:00
btree.c hfs: do not free node before using 2018-11-30 14:56:14 -08:00
btree.h fs: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
catalog.c hfs: prevent btree data loss on ENOSPC 2018-10-31 08:54:13 -07:00
dir.c hfs: use d_splice_alias() 2018-05-22 14:27:59 -04:00
extent.c fs/hfs/extent.c: fix array out of bounds read of array extent 2018-10-31 08:54:13 -07:00
hfs_fs.h hfs/hfsplus: use 64-bit inode timestamps 2019-12-18 18:07:32 +01:00
hfs.h
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
mdb.c hfs: stop using ioctl_by_bdev 2020-05-09 16:15:13 -06:00
part_tbl.c
string.c get rid of 'parent' argument of ->d_compare() 2016-07-31 16:37:25 -04:00
super.c [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
sysdep.c
trans.c qstr: constify instances in hfs 2016-07-20 23:30:06 -04:00