1 files changed, 64 insertions, 10 deletions

diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 237d935747a5..380152603d1e 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -345,7 +345,8 @@ struct rsc {
 
 static struct cache_head *rsc_table[RSC_HASHMAX];
 static struct cache_detail rsc_cache;
-static struct rsc *rsc_lookup(struct rsc *item, int set);
+static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
+static struct rsc *rsc_lookup(struct rsc *item);
 
 static void rsc_free(struct rsc *rsci)
 {
@@ -372,15 +373,21 @@ rsc_hash(struct rsc *rsci)
         return hash_mem(rsci->handle.data, rsci->handle.len, RSC_HASHBITS);
 }
 
-static inline int
-rsc_match(struct rsc *new, struct rsc *tmp)
+static int
+rsc_match(struct cache_head *a, struct cache_head *b)
 {
+        struct rsc *new = container_of(a, struct rsc, h);
+        struct rsc *tmp = container_of(b, struct rsc, h);
+
         return netobj_equal(&new->handle, &tmp->handle);
 }
 
-static inline void
-rsc_init(struct rsc *new, struct rsc *tmp)
+static void
+rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
 {
+        struct rsc *new = container_of(cnew, struct rsc, h);
+        struct rsc *tmp = container_of(ctmp, struct rsc, h);
+
         new->handle.len = tmp->handle.len;
         tmp->handle.len = 0;
         new->handle.data = tmp->handle.data;
@@ -389,9 +396,12 @@ rsc_init(struct rsc *new, struct rsc *tmp)
         new->cred.cr_group_info = NULL;
 }
 
-static inline void
-rsc_update(struct rsc *new, struct rsc *tmp)
+static void
+update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
 {
+        struct rsc *new = container_of(cnew, struct rsc, h);
+        struct rsc *tmp = container_of(ctmp, struct rsc, h);
+
         new->mechctx = tmp->mechctx;
         tmp->mechctx = NULL;
         memset(&new->seqdata, 0, sizeof(new->seqdata));
@@ -400,6 +410,16 @@ rsc_update(struct rsc *new, struct rsc *tmp)
         tmp->cred.cr_group_info = NULL;
 }
 
+static struct cache_head *
+rsc_alloc(void)
+{
+        struct rsc *rsci = kmalloc(sizeof(*rsci), GFP_KERNEL);
+        if (rsci)
+                return &rsci->h;
+        else
+                return NULL;
+}
+
 static int rsc_parse(struct cache_detail *cd,
                      char *mesg, int mlen)
 {
@@ -425,6 +445,10 @@ static int rsc_parse(struct cache_detail *cd,
         if (expiry == 0)
                 goto out;
 
+        rscp = rsc_lookup(&rsci);
+        if (!rscp)
+                goto out;
+
         /* uid, or NEGATIVE */
         rv = get_int(&mesg, &rsci.cred.cr_uid);
         if (rv == -EINVAL)
@@ -480,12 +504,14 @@ static int rsc_parse(struct cache_detail *cd,
                 gss_mech_put(gm);
         }
         rsci.h.expiry_time = expiry;
-        rscp = rsc_lookup(&rsci, 1);
+        rscp = rsc_update(&rsci, rscp);
         status = 0;
 out:
         rsc_free(&rsci);
         if (rscp)
                 rsc_put(&rscp->h, &rsc_cache);
+        else
+                status = -ENOMEM;
         return status;
 }
 
@@ -496,9 +522,37 @@ static struct cache_detail rsc_cache = {
         .name           = "auth.rpcsec.context",
         .cache_put      = rsc_put,
         .cache_parse    = rsc_parse,
+        .match          = rsc_match,
+        .init           = rsc_init,
+        .update         = update_rsc,
+        .alloc          = rsc_alloc,
 };
 
-static DefineSimpleCacheLookup(rsc, rsc);
+static struct rsc *rsc_lookup(struct rsc *item)
+{
+        struct cache_head *ch;
+        int hash = rsc_hash(item);
+
+        ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
+        if (ch)
+                return container_of(ch, struct rsc, h);
+        else
+                return NULL;
+}
+
+static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
+{
+        struct cache_head *ch;
+        int hash = rsc_hash(new);
+
+        ch = sunrpc_cache_update(&rsc_cache, &new->h,
+                                 &old->h, hash);
+        if (ch)
+                return container_of(ch, struct rsc, h);
+        else
+                return NULL;
+}
+
 
 static struct rsc *
 gss_svc_searchbyctx(struct xdr_netobj *handle)
@@ -509,7 +563,7 @@ gss_svc_searchbyctx(struct xdr_netobj *handle)
         memset(&rsci, 0, sizeof(rsci));
         if (dup_to_netobj(&rsci.handle, handle->data, handle->len))
                 return NULL;
-        found = rsc_lookup(&rsci, 0);
+        found = rsc_lookup(&rsci);
         rsc_free(&rsci);
         if (!found)
                 return NULL;