X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=fs%2Fnfsd%2Fnfs4idmap.c;h=13369650cdf9b8db38f2af1a456db8e7cff5a645;hb=987b0145d94eecf292d8b301228356f44611ab7c;hp=4b6aa60dfcebf81956fcd83cd34eb9f87967780f;hpb=f7ed79d23a47594e7834d66a8f14449796d4f3e6;p=linux-2.6.git

diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 4b6aa60df..13369650c 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -76,18 +76,21 @@ struct ent {
 	char              authname[IDMAP_NAMESZ];
 };
 
+#define DefineSimpleCacheLookupMap(STRUCT, FUNC)			\
+        DefineCacheLookup(struct STRUCT, h, FUNC##_lookup,		\
+        (struct STRUCT *item, int set), /*no setup */,			\
+	& FUNC##_cache, FUNC##_hash(item), FUNC##_match(item, tmp),	\
+	STRUCT##_init(new, item), STRUCT##_update(tmp, item), 0)
+
 /* Common entry handling */
 
 #define ENT_HASHBITS          8
 #define ENT_HASHMAX           (1 << ENT_HASHBITS)
 #define ENT_HASHMASK          (ENT_HASHMAX - 1)
 
-static void
-ent_init(struct cache_head *cnew, struct cache_head *citm)
+static inline void
+ent_init(struct ent *new, struct ent *itm)
 {
-	struct ent *new = container_of(cnew, struct ent, h);
-	struct ent *itm = container_of(citm, struct ent, h);
-
 	new->id = itm->id;
 	new->type = itm->type;
 
@@ -95,21 +98,19 @@ ent_init(struct cache_head *cnew, struct cache_head *citm)
 	strlcpy(new->authname, itm->authname, sizeof(new->name));
 }
 
-static void
-ent_put(struct kref *ref)
+static inline void
+ent_update(struct ent *new, struct ent *itm)
 {
-	struct ent *map = container_of(ref, struct ent, h.ref);
-	kfree(map);
+	ent_init(new, itm);
 }
 
-static struct cache_head *
-ent_alloc(void)
+static void
+ent_put(struct cache_head *ch, struct cache_detail *cd)
 {
-	struct ent *e = kmalloc(sizeof(*e), GFP_KERNEL);
-	if (e)
-		return &e->h;
-	else
-		return NULL;
+	if (cache_put(ch, cd)) {
+		struct ent *map = container_of(ch, struct ent, h);
+		kfree(map);
+	}
 }
 
 /*
@@ -148,12 +149,9 @@ idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
 	(*bpp)[-1] = '\n';
 }
 
-static int
-idtoname_match(struct cache_head *ca, struct cache_head *cb)
+static inline int
+idtoname_match(struct ent *a, struct ent *b)
 {
-	struct ent *a = container_of(ca, struct ent, h);
-	struct ent *b = container_of(cb, struct ent, h);
-
 	return (a->id == b->id && a->type == b->type &&
 	    strcmp(a->authname, b->authname) == 0);
 }
@@ -186,8 +184,7 @@ warn_no_idmapd(struct cache_detail *detail)
 
 
 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 ent *, int);
 
 static struct cache_detail idtoname_cache = {
 	.owner		= THIS_MODULE,
@@ -199,10 +196,6 @@ static struct cache_detail idtoname_cache = {
 	.cache_parse	= idtoname_parse,
 	.cache_show	= idtoname_show,
 	.warn_no_listener = warn_no_idmapd,
-	.match		= idtoname_match,
-	.init		= ent_init,
-	.update		= ent_init,
-	.alloc		= ent_alloc,
 };
 
 int
@@ -245,11 +238,6 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
 	if (ent.h.expiry_time == 0)
 		goto out;
 
-	error = -ENOMEM;
-	res = idtoname_lookup(&ent);
-	if (!res)
-		goto out;
-
 	/* Name */
 	error = qword_get(&buf, buf1, PAGE_SIZE);
 	if (error == -EINVAL)
@@ -264,11 +252,10 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
 		memcpy(ent.name, buf1, sizeof(ent.name));
 	}
 	error = -ENOMEM;
-	res = idtoname_update(&ent, res);
-	if (res == NULL)
+	if ((res = idtoname_lookup(&ent, 1)) == NULL)
 		goto out;
 
-	cache_put(&res->h, &idtoname_cache);
+	ent_put(&res->h, &idtoname_cache);
 
 	error = 0;
 out:
@@ -277,31 +264,7 @@ out:
 	return error;
 }
 
-
-static struct ent *
-idtoname_lookup(struct ent *item)
-{
-	struct cache_head *ch = sunrpc_cache_lookup(&idtoname_cache,
-						    &item->h,
-						    idtoname_hash(item));
-	if (ch)
-		return container_of(ch, struct ent, h);
-	else
-		return NULL;
-}
-
-static struct ent *
-idtoname_update(struct ent *new, struct ent *old)
-{
-	struct cache_head *ch = sunrpc_cache_update(&idtoname_cache,
-						    &new->h, &old->h,
-						    idtoname_hash(new));
-	if (ch)
-		return container_of(ch, struct ent, h);
-	else
-		return NULL;
-}
-
+static DefineSimpleCacheLookupMap(ent, idtoname);
 
 /*
  * Name -> ID cache
@@ -328,12 +291,9 @@ nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
 	(*bpp)[-1] = '\n';
 }
 
-static int
-nametoid_match(struct cache_head *ca, struct cache_head *cb)
+static inline int
+nametoid_match(struct ent *a, struct ent *b)
 {
-	struct ent *a = container_of(ca, struct ent, h);
-	struct ent *b = container_of(cb, struct ent, h);
-
 	return (a->type == b->type && strcmp(a->name, b->name) == 0 &&
 	    strcmp(a->authname, b->authname) == 0);
 }
@@ -357,8 +317,7 @@ 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 ent *, int);
 static int         nametoid_parse(struct cache_detail *, char *, int);
 
 static struct cache_detail nametoid_cache = {
@@ -371,10 +330,6 @@ static struct cache_detail nametoid_cache = {
 	.cache_parse	= nametoid_parse,
 	.cache_show	= nametoid_show,
 	.warn_no_listener = warn_no_idmapd,
-	.match		= nametoid_match,
-	.init		= ent_init,
-	.update		= ent_init,
-	.alloc		= ent_alloc,
 };
 
 static int
@@ -424,14 +379,10 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
 		set_bit(CACHE_NEGATIVE, &ent.h.flags);
 
 	error = -ENOMEM;
-	res = nametoid_lookup(&ent);
-	if (res == NULL)
-		goto out;
-	res = nametoid_update(&ent, res);
-	if (res == NULL)
+	if ((res = nametoid_lookup(&ent, 1)) == NULL)
 		goto out;
 
-	cache_put(&res->h, &nametoid_cache);
+	ent_put(&res->h, &nametoid_cache);
 	error = 0;
 out:
 	kfree(buf1);
@@ -439,30 +390,7 @@ out:
 	return (error);
 }
 
-
-static struct ent *
-nametoid_lookup(struct ent *item)
-{
-	struct cache_head *ch = sunrpc_cache_lookup(&nametoid_cache,
-						    &item->h,
-						    nametoid_hash(item));
-	if (ch)
-		return container_of(ch, struct ent, h);
-	else
-		return NULL;
-}
-
-static struct ent *
-nametoid_update(struct ent *new, struct ent *old)
-{
-	struct cache_head *ch = sunrpc_cache_update(&nametoid_cache,
-						    &new->h, &old->h,
-						    nametoid_hash(new));
-	if (ch)
-		return container_of(ch, struct ent, h);
-	else
-		return NULL;
-}
+static DefineSimpleCacheLookupMap(ent, nametoid);
 
 /*
  * Exported API
@@ -530,24 +458,24 @@ idmap_defer(struct cache_req *req)
 }
 
 static inline int
-do_idmap_lookup(struct ent *(*lookup_fn)(struct ent *), struct ent *key,
+do_idmap_lookup(struct ent *(*lookup_fn)(struct ent *, int), struct ent *key,
 		struct cache_detail *detail, struct ent **item,
 		struct idmap_defer_req *mdr)
 {
-	*item = lookup_fn(key);
+	*item = lookup_fn(key, 0);
 	if (!*item)
 		return -ENOMEM;
 	return cache_check(detail, &(*item)->h, &mdr->req);
 }
 
 static inline int
-do_idmap_lookup_nowait(struct ent *(*lookup_fn)(struct ent *),
+do_idmap_lookup_nowait(struct ent *(*lookup_fn)(struct ent *, int),
 			struct ent *key, struct cache_detail *detail,
 			struct ent **item)
 {
 	int ret = -ENOMEM;
 
-	*item = lookup_fn(key);
+	*item = lookup_fn(key, 0);
 	if (!*item)
 		goto out_err;
 	ret = -ETIMEDOUT;
@@ -560,7 +488,7 @@ do_idmap_lookup_nowait(struct ent *(*lookup_fn)(struct ent *),
 		goto out_put;
 	return 0;
 out_put:
-	cache_put(&(*item)->h, detail);
+	ent_put(&(*item)->h, detail);
 out_err:
 	*item = NULL;
 	return ret;
@@ -568,7 +496,7 @@ out_err:
 
 static int
 idmap_lookup(struct svc_rqst *rqstp,
-		struct ent *(*lookup_fn)(struct ent *), struct ent *key,
+		struct ent *(*lookup_fn)(struct ent *, int), struct ent *key,
 		struct cache_detail *detail, struct ent **item)
 {
 	struct idmap_defer_req *mdr;
@@ -611,7 +539,7 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
 	if (ret)
 		return ret;
 	*id = item->id;
-	cache_put(&item->h, &nametoid_cache);
+	ent_put(&item->h, &nametoid_cache);
 	return 0;
 }
 
@@ -633,7 +561,7 @@ idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
 	ret = strlen(item->name);
 	BUG_ON(ret > IDMAP_NAMESZ);
 	memcpy(name, item->name, ret);
-	cache_put(&item->h, &idtoname_cache);
+	ent_put(&item->h, &idtoname_cache);
 	return ret;
 }