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fat: port to vfs{g,u}id_t and associated helpers 

A while ago we introduced a dedicated vfs{g,u}id_t type in commit
1e5267cd08 ("mnt_idmapping: add vfs{g,u}id_t"). We already switched
over a good part of the VFS. Ultimately we will remove all legacy
idmapped mount helpers that operate only on k{g,u}id_t in favor of the
new type safe helpers that operate on vfs{g,u}id_t.

Cc: Seth Forshee (Digital Ocean) <sforshee@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
This commit is contained in:
Christian Brauner 2022-09-09 11:30:19 +02:00 committed by Christian Brauner (Microsoft)
parent b90cb10531
commit 41d27f518b
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 3 additions and 2 deletions
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5
fs/fat/file.c
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@ -461,8 +461,9 @@ static int fat_allow_set_time(struct user_namespace *mnt_userns,
{
umode_t allow_utime = sbi->options.allow_utime;
if (!uid_eq(current_fsuid(), i_uid_into_mnt(mnt_userns, inode))) {
if (in_group_p(i_gid_into_mnt(mnt_userns, inode)))
if (!vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode),
current_fsuid())) {
if (vfsgid_in_group_p(i_gid_into_vfsgid(mnt_userns, inode)))
allow_utime >>= 3;
if (allow_utime & MAY_WRITE)
return 1;