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2f221d6f7b
linux/fs/ocfs2
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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
..
cluster fs/ocfs2/cluster/tcp.c: remove unneeded break 2020-12-15 12:13:37 -08:00
dlm ocfs2: add missing annotation for dlm_empty_lockres() 2020-06-02 10:59:05 -07:00
dlmfs attr: handle idmapped mounts 2021-01-24 14:27:16 +01:00
acl.c ocfs2: fix remounting needed after setfacl command 2020-08-07 11:33:21 -07:00
acl.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
alloc.c ocfs2: fix potential soft lockup during fstrim 2020-10-13 18:38:27 -07:00
alloc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
aops.c fs: convert mpage_readpages to mpage_readahead 2020-06-02 10:59:07 -07:00
aops.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
blockcheck.c ocfs2: replace HTTP links with HTTPS ones 2020-08-07 11:33:22 -07:00
blockcheck.h ocfs: no need to check return value of debugfs_create functions 2019-07-12 11:05:41 -07:00
buffer_head_io.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
buffer_head_io.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
dcache.c fs/ocfs2: fix race in ocfs2_dentry_attach_lock() 2019-06-13 17:34:56 -10:00
dcache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
dir.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
dir.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
dlmglue.c ocfs2: fix unbalanced locking 2020-08-07 11:33:22 -07:00
dlmglue.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
export.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
export.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
extent_map.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
extent_map.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 405 2019-06-05 17:37:13 +02:00
file.c attr: handle idmapped mounts 2021-01-24 14:27:16 +01:00
file.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
filecheck.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
filecheck.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
heartbeat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
heartbeat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
inode.c ocfs2: fix spelling mistake "ambigous" -> "ambiguous" 2019-09-24 15:54:07 -07:00
inode.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
ioctl.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
ioctl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
journal.c jbd2: rename j_maxlen to j_total_len and add jbd2_journal_max_txn_bufs 2020-11-06 23:01:02 -05:00
journal.h ocfs2: fix a NULL pointer dereference when call ocfs2_update_inode_fsync_trans() 2020-01-31 10:30:36 -08:00
Kconfig ocfs2: replace HTTP links with HTTPS ones 2020-08-07 11:33:22 -07:00
localalloc.c ocfs2: delete repeated words in comments 2020-10-13 18:38:27 -07:00
localalloc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
locks.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
locks.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
Makefile ocfs2: improve ocfs2 Makefile 2018-12-28 12:11:45 -08:00
mmap.c ocfs2: fix spelling mistake and grammar 2020-06-10 19:14:18 -07:00
mmap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
move_extents.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
move_extents.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
namei.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
namei.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
ocfs1_fs_compat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 405 2019-06-05 17:37:13 +02:00
ocfs2_fs.h ocfs2: fix value of OCFS2_INVALID_SLOT 2020-06-26 00:27:37 -07:00
ocfs2_ioctl.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
ocfs2_lockid.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
ocfs2_lockingver.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
ocfs2_trace.h ocfs2: fix the application IO timeout when fstrim is running 2019-03-05 21:07:13 -08:00
ocfs2.h ocfs2: change slot number type s16 to u16 2020-08-07 11:33:21 -07:00
quota_global.c quota: Check that quota is not dirty before release 2019-10-31 19:07:42 +01:00
quota_local.c ocfs2: return -EROFS when filesystem becomes read-only 2018-08-17 16:20:27 -07:00
quota.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
refcounttree.c namei: make permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
refcounttree.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
reservations.c ocfs2: remove unused macros 2020-04-02 09:35:25 -07:00
reservations.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
resize.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
resize.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
slot_map.c ocfs2: mount shared volume without ha stack 2020-06-02 10:59:05 -07:00
slot_map.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
stack_o2cb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
stack_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
stackglue.c ocfs2: remove FS_OCFS2_NM 2020-04-02 09:35:25 -07:00
stackglue.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
suballoc.c ocfs2: change slot number type s16 to u16 2020-08-07 11:33:21 -07:00
suballoc.h ocfs2: suballoc.h: delete a duplicated word 2020-08-07 11:33:21 -07:00
super.c ocfs2: initialize ip_next_orphan 2020-11-14 11:26:04 -08:00
super.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
symlink.c
symlink.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
sysfile.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
sysfile.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
uptodate.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
uptodate.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145 2019-05-30 11:25:18 -07:00
xattr.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
xattr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00