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userns: Convert group_info values from gid_t to kgid_t.

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As a first step to converting struct cred to be all kuid_t and kgid_t
values convert the group values stored in group_info to always be
kgid_t values.   Unless user namespaces are used this change should
have no effect.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2011-11-14 15:56:38 -08:00
parent 22d917d80e
commit ae2975bc34
12 changed files with 104 additions and 49 deletions
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9
include/linux/cred.h
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@@ -17,6 +17,7 @@
#include <linux/key.h>
#include <linux/selinux.h>
#include <linux/atomic.h>
#include <linux/uidgid.h>
struct user_struct;
struct cred;
@@ -26,14 +27,14 @@ struct inode;
* COW Supplementary groups list
*/
#define NGROUPS_SMALL 32
#define NGROUPS_PER_BLOCK ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
#define NGROUPS_PER_BLOCK ((unsigned int)(PAGE_SIZE / sizeof(kgid_t)))
struct group_info {
atomic_t usage;
int ngroups;
int nblocks;
gid_t small_block[NGROUPS_SMALL];
gid_t *blocks[0];
kgid_t small_block[NGROUPS_SMALL];
kgid_t *blocks[0];
};
/**
@@ -66,7 +67,7 @@ extern struct group_info init_groups;
extern void groups_free(struct group_info *);
extern int set_current_groups(struct group_info *);
extern int set_groups(struct cred *, struct group_info *);
extern int groups_search(const struct group_info *, gid_t);
extern int groups_search(const struct group_info *, kgid_t);
/* access the groups "array" with this macro */
#define GROUP_AT(gi, i) \