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Subject[PATCH review 70/85] nfsd: Store ex_anon_uid and ex_anon_gid as kuids and kgids
From: "Eric W. Biederman" <ebiederm@xmission.com>

Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
fs/nfsd/auth.c | 2 +-
fs/nfsd/export.c | 22 ++++++++++++++--------
include/linux/nfsd/export.h | 4 ++--
3 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index 34a10d7..4d6642b 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -58,7 +58,7 @@ int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)

for (i = 0; i < rqgi->ngroups; i++) {
if (gid_eq(GLOBAL_ROOT_GID, GROUP_AT(rqgi, i)))
- GROUP_AT(gi, i) = make_kgid(&init_user_ns, exp->ex_anon_gid);
+ GROUP_AT(gi, i) = exp->ex_anon_gid;
else
GROUP_AT(gi, i) = GROUP_AT(rqgi, i);
}
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index a3946cf..5681c59 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -544,13 +544,17 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
err = get_int(&mesg, &an_int);
if (err)
goto out3;
- exp.ex_anon_uid= an_int;
+ exp.ex_anon_uid= make_kuid(&init_user_ns, an_int);
+ if (!uid_valid(exp.ex_anon_uid))
+ goto out3;

/* anon gid */
err = get_int(&mesg, &an_int);
if (err)
goto out3;
- exp.ex_anon_gid= an_int;
+ exp.ex_anon_gid= make_kgid(&init_user_ns, an_int);
+ if (!gid_valid(exp.ex_anon_gid))
+ goto out3;

/* fsid */
err = get_int(&mesg, &an_int);
@@ -613,7 +617,7 @@ out:
}

static void exp_flags(struct seq_file *m, int flag, int fsid,
- uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs);
+ kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fslocs);
static void show_secinfo(struct seq_file *m, struct svc_export *exp);

static int svc_export_show(struct seq_file *m,
@@ -1179,15 +1183,17 @@ static void show_secinfo(struct seq_file *m, struct svc_export *exp)
}

static void exp_flags(struct seq_file *m, int flag, int fsid,
- uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
+ kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fsloc)
{
show_expflags(m, flag, NFSEXP_ALLFLAGS);
if (flag & NFSEXP_FSID)
seq_printf(m, ",fsid=%d", fsid);
- if (anonu != (uid_t)-2 && anonu != (0x10000-2))
- seq_printf(m, ",anonuid=%u", anonu);
- if (anong != (gid_t)-2 && anong != (0x10000-2))
- seq_printf(m, ",anongid=%u", anong);
+ if (!uid_eq(anonu, make_kuid(&init_user_ns, (uid_t)-2)) &&
+ !uid_eq(anonu, make_kuid(&init_user_ns, 0x10000-2)))
+ seq_printf(m, ",anonuid=%u", from_kuid(&init_user_ns, anonu));
+ if (!gid_eq(anong, make_kgid(&init_user_ns, (gid_t)-2)) &&
+ !gid_eq(anong, make_kgid(&init_user_ns, 0x10000-2)))
+ seq_printf(m, ",anongid=%u", from_kgid(&init_user_ns, anong));
if (fsloc && fsloc->locations_count > 0) {
char *loctype = (fsloc->migrated) ? "refer" : "replicas";
int i;
diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index 24c1392..7898c99 100644
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -49,8 +49,8 @@ struct svc_export {
struct auth_domain * ex_client;
int ex_flags;
struct path ex_path;
- uid_t ex_anon_uid;
- gid_t ex_anon_gid;
+ kuid_t ex_anon_uid;
+ kgid_t ex_anon_gid;
int ex_fsid;
unsigned char * ex_uuid; /* 16 byte fsid */
struct nfsd4_fs_locations ex_fslocs;
--
1.7.5.4


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