NFSd: remove hard-coded dereferences to name-to-id and id-to-name caches

These dereferences to global static caches are redundant. They also prevents
converting these caches into per-net ones. So this patch is cleanup + precursor
of patch set,a which will make them per-net.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 24 insertions, 26 deletions

diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 322d11ce06a..2ff44708ea9 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -183,8 +183,9 @@ warn_no_idmapd(struct cache_detail *detail, int has_died)
 
 
 static int         idtoname_parse(struct cache_detail *, char *, int);
-static struct ent *idtoname_lookup(struct ent *);
-static struct ent *idtoname_update(struct ent *, struct ent *);
+static struct ent *idtoname_lookup(struct cache_detail *, struct ent *);
+static struct ent *idtoname_update(struct cache_detail *, struct ent *,
+                                   struct ent *);
 
 static struct cache_detail idtoname_cache = {
         .owner          = THIS_MODULE,
@@ -244,7 +245,7 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
                 goto out;
 
         error = -ENOMEM;
-        res = idtoname_lookup(&ent);
+        res = idtoname_lookup(cd, &ent);
         if (!res)
                 goto out;
 
@@ -260,11 +261,11 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
         else
                 memcpy(ent.name, buf1, sizeof(ent.name));
         error = -ENOMEM;
-        res = idtoname_update(&ent, res);
+        res = idtoname_update(cd, &ent, res);
         if (res == NULL)
                 goto out;
 
-        cache_put(&res->h, &idtoname_cache);
+        cache_put(&res->h, cd);
 
         error = 0;
 out:
@@ -275,10 +276,9 @@ out:
 
 
 static struct ent *
-idtoname_lookup(struct ent *item)
+idtoname_lookup(struct cache_detail *cd, struct ent *item)
 {
-        struct cache_head *ch = sunrpc_cache_lookup(&idtoname_cache,
-                                                    &item->h,
+        struct cache_head *ch = sunrpc_cache_lookup(cd, &item->h,
                                                     idtoname_hash(item));
         if (ch)
                 return container_of(ch, struct ent, h);
@@ -287,10 +287,9 @@ idtoname_lookup(struct ent *item)
 }
 
 static struct ent *
-idtoname_update(struct ent *new, struct ent *old)
+idtoname_update(struct cache_detail *cd, struct ent *new, struct ent *old)
 {
-        struct cache_head *ch = sunrpc_cache_update(&idtoname_cache,
-                                                    &new->h, &old->h,
+        struct cache_head *ch = sunrpc_cache_update(cd, &new->h, &old->h,
                                                     idtoname_hash(new));
         if (ch)
                 return container_of(ch, struct ent, h);
@@ -359,8 +358,9 @@ nametoid_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h)
         return 0;
 }
 
-static struct ent *nametoid_lookup(struct ent *);
-static struct ent *nametoid_update(struct ent *, struct ent *);
+static struct ent *nametoid_lookup(struct cache_detail *, struct ent *);
+static struct ent *nametoid_update(struct cache_detail *, struct ent *,
+                                   struct ent *);
 static int         nametoid_parse(struct cache_detail *, char *, int);
 
 static struct cache_detail nametoid_cache = {
@@ -426,14 +426,14 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
                 set_bit(CACHE_NEGATIVE, &ent.h.flags);
 
         error = -ENOMEM;
-        res = nametoid_lookup(&ent);
+        res = nametoid_lookup(cd, &ent);
         if (res == NULL)
                 goto out;
-        res = nametoid_update(&ent, res);
+        res = nametoid_update(cd, &ent, res);
         if (res == NULL)
                 goto out;
 
-        cache_put(&res->h, &nametoid_cache);
+        cache_put(&res->h, cd);
         error = 0;
 out:
         kfree(buf1);
@@ -443,10 +443,9 @@ out:
 
 
 static struct ent *
-nametoid_lookup(struct ent *item)
+nametoid_lookup(struct cache_detail *cd, struct ent *item)
 {
-        struct cache_head *ch = sunrpc_cache_lookup(&nametoid_cache,
-                                                    &item->h,
+        struct cache_head *ch = sunrpc_cache_lookup(cd, &item->h,
                                                     nametoid_hash(item));
         if (ch)
                 return container_of(ch, struct ent, h);
@@ -455,10 +454,9 @@ nametoid_lookup(struct ent *item)
 }
 
 static struct ent *
-nametoid_update(struct ent *new, struct ent *old)
+nametoid_update(struct cache_detail *cd, struct ent *new, struct ent *old)
 {
-        struct cache_head *ch = sunrpc_cache_update(&nametoid_cache,
-                                                    &new->h, &old->h,
+        struct cache_head *ch = sunrpc_cache_update(cd, &new->h, &old->h,
                                                     nametoid_hash(new));
         if (ch)
                 return container_of(ch, struct ent, h);
@@ -493,12 +491,12 @@ nfsd_idmap_shutdown(void)
 
 static int
 idmap_lookup(struct svc_rqst *rqstp,
-                struct ent *(*lookup_fn)(struct ent *), struct ent *key,
-                struct cache_detail *detail, struct ent **item)
+                struct ent *(*lookup_fn)(struct cache_detail *, struct ent *),
+                struct ent *key, struct cache_detail *detail, struct ent **item)
 {
         int ret;
 
-        *item = lookup_fn(key);
+        *item = lookup_fn(detail, key);
         if (!*item)
                 return -ENOMEM;
  retry:
@@ -506,7 +504,7 @@ idmap_lookup(struct svc_rqst *rqstp,
 
         if (ret == -ETIMEDOUT) {
                 struct ent *prev_item = *item;
-                *item = lookup_fn(key);
+                *item = lookup_fn(detail, key);
                 if (*item != prev_item)
                         goto retry;
                 cache_put(&(*item)->h, detail);