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authorOlga Kornievskaia <aglo@citi.umich.edu>2008-12-23 21:17:15 (GMT)
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-12-23 21:17:15 (GMT)
commit68e76ad0baf8f5d5060377c2423ee6eed5c63057 (patch)
treebaab3e30cc3b50bc49a553ee884885189ce85a8e /net
parent34769fc488b463cb753fc632f8f5ba56c918b7cb (diff)
downloadlinux-68e76ad0baf8f5d5060377c2423ee6eed5c63057.tar.xz
nfsd: pass client principal name in rsc downcall
Two principals are involved in krb5 authentication: the target, who we authenticate *to* (normally the name of the server, like nfs/server.citi.umich.edu@CITI.UMICH.EDU), and the source, we we authenticate *as* (normally a user, like bfields@UMICH.EDU) In the case of NFSv4 callbacks, the target of the callback should be the source of the client's setclientid call, and the source should be the nfs server's own principal. Therefore we allow svcgssd to pass down the name of the principal that just authenticated, so that on setclientid we can store that principal name with the new client, to be used later on callbacks. Signed-off-by: Olga Kornievskaia <aglo@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/auth_gss/svcauth_gss.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 12803da..e9baa6e 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -332,6 +332,7 @@ struct rsc {
struct svc_cred cred;
struct gss_svc_seq_data seqdata;
struct gss_ctx *mechctx;
+ char *client_name;
};
static struct cache_head *rsc_table[RSC_HASHMAX];
@@ -346,6 +347,7 @@ static void rsc_free(struct rsc *rsci)
gss_delete_sec_context(&rsci->mechctx);
if (rsci->cred.cr_group_info)
put_group_info(rsci->cred.cr_group_info);
+ kfree(rsci->client_name);
}
static void rsc_put(struct kref *ref)
@@ -383,6 +385,7 @@ rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
tmp->handle.data = NULL;
new->mechctx = NULL;
new->cred.cr_group_info = NULL;
+ new->client_name = NULL;
}
static void
@@ -397,6 +400,8 @@ update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
spin_lock_init(&new->seqdata.sd_lock);
new->cred = tmp->cred;
tmp->cred.cr_group_info = NULL;
+ new->client_name = tmp->client_name;
+ tmp->client_name = NULL;
}
static struct cache_head *
@@ -486,6 +491,15 @@ static int rsc_parse(struct cache_detail *cd,
status = gss_import_sec_context(buf, len, gm, &rsci.mechctx);
if (status)
goto out;
+
+ /* get client name */
+ len = qword_get(&mesg, buf, mlen);
+ if (len > 0) {
+ rsci.client_name = kstrdup(buf, GFP_KERNEL);
+ if (!rsci.client_name)
+ goto out;
+ }
+
}
rsci.h.expiry_time = expiry;
rscp = rsc_update(&rsci, rscp);
@@ -913,6 +927,15 @@ struct gss_svc_data {
struct rsc *rsci;
};
+char *svc_gss_principal(struct svc_rqst *rqstp)
+{
+ struct gss_svc_data *gd = (struct gss_svc_data *)rqstp->rq_auth_data;
+
+ if (gd && gd->rsci)
+ return gd->rsci->client_name;
+ return NULL;
+}
+
static int
svcauth_gss_set_client(struct svc_rqst *rqstp)
{