[PATCH] knfsd: Use new sunrpc cache for rsi cache

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 59 insertions, 7 deletions

diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index aadb4e8d6aa7..237d935747a5 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -78,7 +78,8 @@ struct rsi {
 
 static struct cache_head *rsi_table[RSI_HASHMAX];
 static struct cache_detail rsi_cache;
-static struct rsi *rsi_lookup(struct rsi *item, int set);
+static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
+static struct rsi *rsi_lookup(struct rsi *item);
 
 static void rsi_free(struct rsi *rsii)
 {
@@ -103,8 +104,10 @@ static inline int rsi_hash(struct rsi *item)
              ^ hash_mem(item->in_token.data, item->in_token.len, RSI_HASHBITS);
 }
 
-static inline int rsi_match(struct rsi *item, struct rsi *tmp)
+static int rsi_match(struct cache_head *a, struct cache_head *b)
 {
+        struct rsi *item = container_of(a, struct rsi, h);
+        struct rsi *tmp = container_of(b, struct rsi, h);
         return netobj_equal(&item->in_handle, &tmp->in_handle)
                 && netobj_equal(&item->in_token, &tmp->in_token);
 }
@@ -125,8 +128,11 @@ static inline int dup_netobj(struct xdr_netobj *dst, struct xdr_netobj *src)
         return dup_to_netobj(dst, src->data, src->len);
 }
 
-static inline void rsi_init(struct rsi *new, struct rsi *item)
+static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
 {
+        struct rsi *new = container_of(cnew, struct rsi, h);
+        struct rsi *item = container_of(citem, struct rsi, h);
+
         new->out_handle.data = NULL;
         new->out_handle.len = 0;
         new->out_token.data = NULL;
@@ -141,8 +147,11 @@ static inline void rsi_init(struct rsi *new, struct rsi *item)
         item->in_token.data = NULL;
 }
 
-static inline void rsi_update(struct rsi *new, struct rsi *item)
+static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
 {
+        struct rsi *new = container_of(cnew, struct rsi, h);
+        struct rsi *item = container_of(citem, struct rsi, h);
+
         BUG_ON(new->out_handle.data || new->out_token.data);
         new->out_handle.len = item->out_handle.len;
         item->out_handle.len = 0;
@@ -157,6 +166,15 @@ static inline void rsi_update(struct rsi *new, struct rsi *item)
         new->minor_status = item->minor_status;
 }
 
+static struct cache_head *rsi_alloc(void)
+{
+        struct rsi *rsii = kmalloc(sizeof(*rsii), GFP_KERNEL);
+        if (rsii)
+                return &rsii->h;
+        else
+                return NULL;
+}
+
 static void rsi_request(struct cache_detail *cd,
                        struct cache_head *h,
                        char **bpp, int *blen)
@@ -198,6 +216,10 @@ static int rsi_parse(struct cache_detail *cd,
         if (dup_to_netobj(&rsii.in_token, buf, len))
                 goto out;
 
+        rsip = rsi_lookup(&rsii);
+        if (!rsip)
+                goto out;
+
         rsii.h.flags = 0;
         /* expiry */
         expiry = get_expiry(&mesg);
@@ -240,12 +262,14 @@ static int rsi_parse(struct cache_detail *cd,
                         goto out;
         }
         rsii.h.expiry_time = expiry;
-        rsip = rsi_lookup(&rsii, 1);
+        rsip = rsi_update(&rsii, rsip);
         status = 0;
 out:
         rsi_free(&rsii);
         if (rsip)
                 rsi_put(&rsip->h, &rsi_cache);
+        else
+                status = -ENOMEM;
         return status;
 }
 
@@ -257,9 +281,37 @@ static struct cache_detail rsi_cache = {
         .cache_put      = rsi_put,
         .cache_request  = rsi_request,
         .cache_parse    = rsi_parse,
+        .match          = rsi_match,
+        .init           = rsi_init,
+        .update         = update_rsi,
+        .alloc          = rsi_alloc,
 };
 
-static DefineSimpleCacheLookup(rsi, rsi)
+static struct rsi *rsi_lookup(struct rsi *item)
+{
+        struct cache_head *ch;
+        int hash = rsi_hash(item);
+
+        ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
+        if (ch)
+                return container_of(ch, struct rsi, h);
+        else
+                return NULL;
+}
+
+static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
+{
+        struct cache_head *ch;
+        int hash = rsi_hash(new);
+
+        ch = sunrpc_cache_update(&rsi_cache, &new->h,
+                                 &old->h, hash);
+        if (ch)
+                return container_of(ch, struct rsi, h);
+        else
+                return NULL;
+}
+
 
 /*
  * The rpcsec_context cache is used to store a context that is
@@ -895,7 +947,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
                         goto drop;
                 }
 
-                rsip = rsi_lookup(&rsikey, 0);
+                rsip = rsi_lookup(&rsikey);
                 rsi_free(&rsikey);
                 if (!rsip) {
                         goto drop;