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nfs: Convert idmap to use kuids and kgids

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Convert nfs_map_name_to_uid to return a kuid_t value.
Convert nfs_map_name_to_gid to return a kgid_t value.
Convert nfs_map_uid_to_name to take a kuid_t paramater.
Convert nfs_map_gid_to_name to take a kgid_t paramater.

Tweak nfs_fattr_map_owner_to_name to use a kuid_t intermediate value.
Tweak nfs_fattr_map_group_to_name to use a kgid_t intermediate value.

Which makes these functions properly handle kuids and kgids, including
erroring of the generated kuid or kgid is invalid.

Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2013-02-01 03:21:47 -08:00
parent 54f834cd55
commit 9f309c86cf
2 changed files with 39 additions and 20 deletions
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9
include/linux/nfs_idmap.h
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@@ -36,6 +36,7 @@
#ifndef NFS_IDMAP_H
#define NFS_IDMAP_H
#include <linux/uidgid.h>
#include <uapi/linux/nfs_idmap.h>
@@ -67,10 +68,10 @@ void nfs_fattr_init_names(struct nfs_fattr *fattr,
void nfs_fattr_free_names(struct nfs_fattr *);
void nfs_fattr_map_and_free_names(struct nfs_server *, struct nfs_fattr *);
int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, __u32 *);
int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, __u32 *);
int nfs_map_uid_to_name(const struct nfs_server *, __u32, char *, size_t);
int nfs_map_gid_to_group(const struct nfs_server *, __u32, char *, size_t);
int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, kuid_t *);
int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, kgid_t *);
int nfs_map_uid_to_name(const struct nfs_server *, kuid_t, char *, size_t);
int nfs_map_gid_to_group(const struct nfs_server *, kgid_t, char *, size_t);
extern unsigned int nfs_idmap_cache_timeout;
#endif /* NFS_IDMAP_H */