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CRED: Wrap task credential accesses in the Ext4 filesystem 

Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: adilger@sun.com
Cc: linux-ext4@vger.kernel.org
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
David Howells 2008-11-14 10:38:51 +11:00 committed by James Morris
parent 6a2f90e9fa
commit 4c9c544e49
2 changed files with 3 additions and 3 deletions
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2
fs/ext4/balloc.c
View File

@ -624,7 +624,7 @@ int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks)
return 1;
/* Hm, nope. Are (enough) root reserved blocks available? */
if (sbi->s_resuid == current->fsuid ||
if (sbi->s_resuid == current_fsuid() ||
((sbi->s_resgid != 0) && in_group_p(sbi->s_resgid)) ||
capable(CAP_SYS_RESOURCE)) {
if (free_blocks >= (nblocks + dirty_blocks))

4
fs/ext4/ialloc.c
View File

@ -785,7 +785,7 @@ got:
spin_unlock(sb_bgl_lock(sbi, flex_group));
}
inode->i_uid = current->fsuid;
inode->i_uid = current_fsuid();
if (test_opt(sb, GRPID))
inode->i_gid = dir->i_gid;
else if (dir->i_mode & S_ISGID) {
@ -793,7 +793,7 @@ got:
if (S_ISDIR(mode))
mode |= S_ISGID;
} else
inode->i_gid = current->fsgid;
inode->i_gid = current_fsgid();
inode->i_mode = mode;
inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb);