X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fsunrpc%2Fsvcauth_unix.c;h=a568f9f541b9ea6826d72e1355904bebac02761f;hb=refs%2Fheads%2Fvserver;hp=3e6c694bbad17fb336dfa87c78ce8317dda18bb9;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 3e6c694bb..a568f9f54 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -9,6 +9,7 @@
 #include <linux/seq_file.h>
 #include <linux/hash.h>
 #include <linux/string.h>
+#include <net/sock.h>
 
 #define RPCDBG_FACILITY	RPCDBG_AUTH
 
@@ -27,41 +28,39 @@ struct unix_domain {
 	/* other stuff later */
 };
 
+extern struct auth_ops svcauth_unix;
+
 struct auth_domain *unix_domain_find(char *name)
 {
-	struct auth_domain *rv, ud;
-	struct unix_domain *new;
-
-	ud.name = name;
-	
-	rv = auth_domain_lookup(&ud, 0);
-
- foundit:
-	if (rv && rv->flavour != RPC_AUTH_UNIX) {
-		auth_domain_put(rv);
-		return NULL;
-	}
-	if (rv)
-		return rv;
-
-	new = kmalloc(sizeof(*new), GFP_KERNEL);
-	if (new == NULL)
-		return NULL;
-	cache_init(&new->h.h);
-	new->h.name = kstrdup(name, GFP_KERNEL);
-	new->h.flavour = RPC_AUTH_UNIX;
-	new->addr_changes = 0;
-	new->h.h.expiry_time = NEVER;
-
-	rv = auth_domain_lookup(&new->h, 2);
-	if (rv == &new->h) {
-		if (atomic_dec_and_test(&new->h.h.refcnt)) BUG();
-	} else {
-		auth_domain_put(&new->h);
-		goto foundit;
+	struct auth_domain *rv;
+	struct unix_domain *new = NULL;
+
+	rv = auth_domain_lookup(name, NULL);
+	while(1) {
+		if (rv) {
+			if (new && rv != &new->h)
+				auth_domain_put(&new->h);
+
+			if (rv->flavour != &svcauth_unix) {
+				auth_domain_put(rv);
+				return NULL;
+			}
+			return rv;
+		}
+
+		new = kmalloc(sizeof(*new), GFP_KERNEL);
+		if (new == NULL)
+			return NULL;
+		kref_init(&new->h.ref);
+		new->h.name = kstrdup(name, GFP_KERNEL);
+		if (new->h.name == NULL) {
+			kfree(new);
+			return NULL;
+		}
+		new->h.flavour = &svcauth_unix;
+		new->addr_changes = 0;
+		rv = auth_domain_lookup(name, &new->h);
 	}
-
-	return rv;
 }
 
 static void svcauth_unix_domain_release(struct auth_domain *dom)
@@ -90,15 +89,15 @@ struct ip_map {
 };
 static struct cache_head	*ip_table[IP_HASHMAX];
 
-static void ip_map_put(struct cache_head *item, struct cache_detail *cd)
+static void ip_map_put(struct kref *kref)
 {
+	struct cache_head *item = container_of(kref, struct cache_head, ref);
 	struct ip_map *im = container_of(item, struct ip_map,h);
-	if (cache_put(item, cd)) {
-		if (test_bit(CACHE_VALID, &item->flags) &&
-		    !test_bit(CACHE_NEGATIVE, &item->flags))
-			auth_domain_put(&im->m_client->h);
-		kfree(im);
-	}
+
+	if (test_bit(CACHE_VALID, &item->flags) &&
+	    !test_bit(CACHE_NEGATIVE, &item->flags))
+		auth_domain_put(&im->m_client->h);
+	kfree(im);
 }
 
 #if IP_HASHBITS == 8
@@ -106,34 +105,44 @@ static void ip_map_put(struct cache_head *item, struct cache_detail *cd)
  * IP addresses in reverse-endian (i.e. on a little-endian machine).
  * So use a trivial but reliable hash instead
  */
-static inline int hash_ip(unsigned long ip)
+static inline int hash_ip(__be32 ip)
 {
-	int hash = ip ^ (ip>>16);
+	int hash = (__force u32)ip ^ ((__force u32)ip>>16);
 	return (hash ^ (hash>>8)) & 0xff;
 }
 #endif
-
-static inline int ip_map_hash(struct ip_map *item)
-{
-	return hash_str(item->m_class, IP_HASHBITS) ^ 
-		hash_ip((unsigned long)item->m_addr.s_addr);
-}
-static inline int ip_map_match(struct ip_map *item, struct ip_map *tmp)
+static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
 {
-	return strcmp(tmp->m_class, item->m_class) == 0
-		&& tmp->m_addr.s_addr == item->m_addr.s_addr;
+	struct ip_map *orig = container_of(corig, struct ip_map, h);
+	struct ip_map *new = container_of(cnew, struct ip_map, h);
+	return strcmp(orig->m_class, new->m_class) == 0
+		&& orig->m_addr.s_addr == new->m_addr.s_addr;
 }
-static inline void ip_map_init(struct ip_map *new, struct ip_map *item)
+static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
 {
+	struct ip_map *new = container_of(cnew, struct ip_map, h);
+	struct ip_map *item = container_of(citem, struct ip_map, h);
+
 	strcpy(new->m_class, item->m_class);
 	new->m_addr.s_addr = item->m_addr.s_addr;
 }
-static inline void ip_map_update(struct ip_map *new, struct ip_map *item)
+static void update(struct cache_head *cnew, struct cache_head *citem)
 {
-	cache_get(&item->m_client->h.h);
+	struct ip_map *new = container_of(cnew, struct ip_map, h);
+	struct ip_map *item = container_of(citem, struct ip_map, h);
+
+	kref_get(&item->m_client->h.ref);
 	new->m_client = item->m_client;
 	new->m_add_change = item->m_add_change;
 }
+static struct cache_head *ip_map_alloc(void)
+{
+	struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL);
+	if (i)
+		return &i->h;
+	else
+		return NULL;
+}
 
 static void ip_map_request(struct cache_detail *cd,
 				  struct cache_head *h,
@@ -141,7 +150,7 @@ static void ip_map_request(struct cache_detail *cd,
 {
 	char text_addr[20];
 	struct ip_map *im = container_of(h, struct ip_map, h);
-	__u32 addr = im->m_addr.s_addr;
+	__be32 addr = im->m_addr.s_addr;
 	
 	snprintf(text_addr, 20, "%u.%u.%u.%u",
 		 ntohl(addr) >> 24 & 0xff,
@@ -154,7 +163,8 @@ static void ip_map_request(struct cache_detail *cd,
 	(*bpp)[-1] = '\n';
 }
 
-static struct ip_map *ip_map_lookup(struct ip_map *, int);
+static struct ip_map *ip_map_lookup(char *class, struct in_addr addr);
+static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
 
 static int ip_map_parse(struct cache_detail *cd,
 			  char *mesg, int mlen)
@@ -166,7 +176,11 @@ static int ip_map_parse(struct cache_detail *cd,
 	int len;
 	int b1,b2,b3,b4;
 	char c;
-	struct ip_map ipm, *ipmp;
+	char class[8];
+	struct in_addr addr;
+	int err;
+
+	struct ip_map *ipmp;
 	struct auth_domain *dom;
 	time_t expiry;
 
@@ -175,7 +189,7 @@ static int ip_map_parse(struct cache_detail *cd,
 	mesg[mlen-1] = 0;
 
 	/* class */
-	len = qword_get(&mesg, ipm.m_class, sizeof(ipm.m_class));
+	len = qword_get(&mesg, class, sizeof(class));
 	if (len <= 0) return -EINVAL;
 
 	/* ip address */
@@ -200,25 +214,22 @@ static int ip_map_parse(struct cache_detail *cd,
 	} else
 		dom = NULL;
 
-	ipm.m_addr.s_addr =
+	addr.s_addr =
 		htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
-	ipm.h.flags = 0;
-	if (dom) {
-		ipm.m_client = container_of(dom, struct unix_domain, h);
-		ipm.m_add_change = ipm.m_client->addr_changes;
+
+	ipmp = ip_map_lookup(class,addr);
+	if (ipmp) {
+		err = ip_map_update(ipmp,
+			     container_of(dom, struct unix_domain, h),
+			     expiry);
 	} else
-		set_bit(CACHE_NEGATIVE, &ipm.h.flags);
-	ipm.h.expiry_time = expiry;
+		err = -ENOMEM;
 
-	ipmp = ip_map_lookup(&ipm, 1);
-	if (ipmp)
-		ip_map_put(&ipmp->h, &ip_map_cache);
 	if (dom)
 		auth_domain_put(dom);
-	if (!ipmp)
-		return -ENOMEM;
+
 	cache_flush();
-	return 0;
+	return err;
 }
 
 static int ip_map_show(struct seq_file *m,
@@ -243,10 +254,10 @@ static int ip_map_show(struct seq_file *m,
 
 	seq_printf(m, "%s %d.%d.%d.%d %s\n",
 		   im->m_class,
-		   htonl(addr.s_addr) >> 24 & 0xff,
-		   htonl(addr.s_addr) >> 16 & 0xff,
-		   htonl(addr.s_addr) >>  8 & 0xff,
-		   htonl(addr.s_addr) >>  0 & 0xff,
+		   ntohl(addr.s_addr) >> 24 & 0xff,
+		   ntohl(addr.s_addr) >> 16 & 0xff,
+		   ntohl(addr.s_addr) >>  8 & 0xff,
+		   ntohl(addr.s_addr) >>  0 & 0xff,
 		   dom
 		   );
 	return 0;
@@ -262,32 +273,70 @@ struct cache_detail ip_map_cache = {
 	.cache_request	= ip_map_request,
 	.cache_parse	= ip_map_parse,
 	.cache_show	= ip_map_show,
+	.match		= ip_map_match,
+	.init		= ip_map_init,
+	.update		= update,
+	.alloc		= ip_map_alloc,
 };
 
-static DefineSimpleCacheLookup(ip_map, 0)
+static struct ip_map *ip_map_lookup(char *class, struct in_addr addr)
+{
+	struct ip_map ip;
+	struct cache_head *ch;
+
+	strcpy(ip.m_class, class);
+	ip.m_addr = addr;
+	ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h,
+				 hash_str(class, IP_HASHBITS) ^
+				 hash_ip(addr.s_addr));
+
+	if (ch)
+		return container_of(ch, struct ip_map, h);
+	else
+		return NULL;
+}
 
+static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry)
+{
+	struct ip_map ip;
+	struct cache_head *ch;
+
+	ip.m_client = udom;
+	ip.h.flags = 0;
+	if (!udom)
+		set_bit(CACHE_NEGATIVE, &ip.h.flags);
+	else {
+		ip.m_add_change = udom->addr_changes;
+		/* if this is from the legacy set_client system call,
+		 * we need m_add_change to be one higher
+		 */
+		if (expiry == NEVER)
+			ip.m_add_change++;
+	}
+	ip.h.expiry_time = expiry;
+	ch = sunrpc_cache_update(&ip_map_cache,
+				 &ip.h, &ipm->h,
+				 hash_str(ipm->m_class, IP_HASHBITS) ^
+				 hash_ip(ipm->m_addr.s_addr));
+	if (!ch)
+		return -ENOMEM;
+	cache_put(ch, &ip_map_cache);
+	return 0;
+}
 
 int auth_unix_add_addr(struct in_addr addr, struct auth_domain *dom)
 {
 	struct unix_domain *udom;
-	struct ip_map ip, *ipmp;
+	struct ip_map *ipmp;
 
-	if (dom->flavour != RPC_AUTH_UNIX)
+	if (dom->flavour != &svcauth_unix)
 		return -EINVAL;
 	udom = container_of(dom, struct unix_domain, h);
-	strcpy(ip.m_class, "nfsd");
-	ip.m_addr = addr;
-	ip.m_client = udom;
-	ip.m_add_change = udom->addr_changes+1;
-	ip.h.flags = 0;
-	ip.h.expiry_time = NEVER;
-	
-	ipmp = ip_map_lookup(&ip, 1);
+	ipmp = ip_map_lookup("nfsd", addr);
 
-	if (ipmp) {
-		ip_map_put(&ipmp->h, &ip_map_cache);
-		return 0;
-	} else
+	if (ipmp)
+		return ip_map_update(ipmp, udom, NEVER);
+	else
 		return -ENOMEM;
 }
 
@@ -295,7 +344,7 @@ int auth_unix_forget_old(struct auth_domain *dom)
 {
 	struct unix_domain *udom;
 	
-	if (dom->flavour != RPC_AUTH_UNIX)
+	if (dom->flavour != &svcauth_unix)
 		return -EINVAL;
 	udom = container_of(dom, struct unix_domain, h);
 	udom->addr_changes++;
@@ -304,13 +353,10 @@ int auth_unix_forget_old(struct auth_domain *dom)
 
 struct auth_domain *auth_unix_lookup(struct in_addr addr)
 {
-	struct ip_map key, *ipm;
+	struct ip_map *ipm;
 	struct auth_domain *rv;
 
-	strcpy(key.m_class, "nfsd");
-	key.m_addr = addr;
-
-	ipm = ip_map_lookup(&key, 0);
+	ipm = ip_map_lookup("nfsd", addr);
 
 	if (!ipm)
 		return NULL;
@@ -323,31 +369,79 @@ struct auth_domain *auth_unix_lookup(struct in_addr addr)
 		rv = NULL;
 	} else {
 		rv = &ipm->m_client->h;
-		cache_get(&rv->h);
+		kref_get(&rv->ref);
 	}
-	ip_map_put(&ipm->h, &ip_map_cache);
+	cache_put(&ipm->h, &ip_map_cache);
 	return rv;
 }
 
 void svcauth_unix_purge(void)
 {
 	cache_purge(&ip_map_cache);
-	cache_purge(&auth_domain_cache);
+}
+
+static inline struct ip_map *
+ip_map_cached_get(struct svc_rqst *rqstp)
+{
+	struct ip_map *ipm;
+	struct svc_sock *svsk = rqstp->rq_sock;
+	spin_lock_bh(&svsk->sk_defer_lock);
+	ipm = svsk->sk_info_authunix;
+	if (ipm != NULL) {
+		if (!cache_valid(&ipm->h)) {
+			/*
+			 * The entry has been invalidated since it was
+			 * remembered, e.g. by a second mount from the
+			 * same IP address.
+			 */
+			svsk->sk_info_authunix = NULL;
+			spin_unlock_bh(&svsk->sk_defer_lock);
+			cache_put(&ipm->h, &ip_map_cache);
+			return NULL;
+		}
+		cache_get(&ipm->h);
+	}
+	spin_unlock_bh(&svsk->sk_defer_lock);
+	return ipm;
+}
+
+static inline void
+ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm)
+{
+	struct svc_sock *svsk = rqstp->rq_sock;
+
+	spin_lock_bh(&svsk->sk_defer_lock);
+	if (svsk->sk_sock->type == SOCK_STREAM &&
+	    svsk->sk_info_authunix == NULL) {
+		/* newly cached, keep the reference */
+		svsk->sk_info_authunix = ipm;
+		ipm = NULL;
+	}
+	spin_unlock_bh(&svsk->sk_defer_lock);
+	if (ipm)
+		cache_put(&ipm->h, &ip_map_cache);
+}
+
+void
+svcauth_unix_info_release(void *info)
+{
+	struct ip_map *ipm = info;
+	cache_put(&ipm->h, &ip_map_cache);
 }
 
 static int
 svcauth_unix_set_client(struct svc_rqst *rqstp)
 {
-	struct ip_map key, *ipm;
+	struct ip_map *ipm;
 
 	rqstp->rq_client = NULL;
 	if (rqstp->rq_proc == 0)
 		return SVC_OK;
 
-	strcpy(key.m_class, rqstp->rq_server->sv_program->pg_class);
-	key.m_addr = rqstp->rq_addr.sin_addr;
-
-	ipm = ip_map_lookup(&key, 0);
+	ipm = ip_map_cached_get(rqstp);
+	if (ipm == NULL)
+		ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class,
+				    rqstp->rq_addr.sin_addr);
 
 	if (ipm == NULL)
 		return SVC_DENIED;
@@ -356,20 +450,21 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
 		default:
 			BUG();
 		case -EAGAIN:
+		case -ETIMEDOUT:
 			return SVC_DROP;
 		case -ENOENT:
 			return SVC_DENIED;
 		case 0:
 			rqstp->rq_client = &ipm->m_client->h;
-			cache_get(&rqstp->rq_client->h);
-			ip_map_put(&ipm->h, &ip_map_cache);
+			kref_get(&rqstp->rq_client->ref);
+			ip_map_cached_put(rqstp, ipm);
 			break;
 	}
 	return SVC_OK;
 }
 
 static int
-svcauth_null_accept(struct svc_rqst *rqstp, u32 *authp)
+svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
 {
 	struct kvec	*argv = &rqstp->rq_arg.head[0];
 	struct kvec	*resv = &rqstp->rq_res.head[0];
@@ -386,7 +481,7 @@ svcauth_null_accept(struct svc_rqst *rqstp, u32 *authp)
 		*authp = rpc_autherr_badcred;
 		return SVC_DENIED;
 	}
-	if (svc_getu32(argv) != RPC_AUTH_NULL || svc_getu32(argv) != 0) {
+	if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
 		dprintk("svc: bad null verf\n");
 		*authp = rpc_autherr_badverf;
 		return SVC_DENIED;
@@ -400,8 +495,8 @@ svcauth_null_accept(struct svc_rqst *rqstp, u32 *authp)
 		return SVC_DROP; /* kmalloc failure - client must retry */
 
 	/* Put NULL verifier */
-	svc_putu32(resv, RPC_AUTH_NULL);
-	svc_putu32(resv, 0);
+	svc_putnl(resv, RPC_AUTH_NULL);
+	svc_putnl(resv, 0);
 
 	return SVC_OK;
 }
@@ -431,7 +526,7 @@ struct auth_ops svcauth_null = {
 
 
 static int
-svcauth_unix_accept(struct svc_rqst *rqstp, u32 *authp)
+svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
 {
 	struct kvec	*argv = &rqstp->rq_arg.head[0];
 	struct kvec	*resv = &rqstp->rq_res.head[0];
@@ -447,31 +542,31 @@ svcauth_unix_accept(struct svc_rqst *rqstp, u32 *authp)
 
 	svc_getu32(argv);			/* length */
 	svc_getu32(argv);			/* time stamp */
-	slen = XDR_QUADLEN(ntohl(svc_getu32(argv)));	/* machname length */
+	slen = XDR_QUADLEN(svc_getnl(argv));	/* machname length */
 	if (slen > 64 || (len -= (slen + 3)*4) < 0)
 		goto badcred;
-	argv->iov_base = (void*)((u32*)argv->iov_base + slen);	/* skip machname */
+	argv->iov_base = (void*)((__be32*)argv->iov_base + slen);	/* skip machname */
 	argv->iov_len -= slen*4;
 
-	cred->cr_uid = ntohl(svc_getu32(argv));		/* uid */
-	cred->cr_gid = ntohl(svc_getu32(argv));		/* gid */
-	slen = ntohl(svc_getu32(argv));			/* gids length */
+	cred->cr_uid = svc_getnl(argv);		/* uid */
+	cred->cr_gid = svc_getnl(argv);		/* gid */
+	slen = svc_getnl(argv);			/* gids length */
 	if (slen > 16 || (len -= (slen + 2)*4) < 0)
 		goto badcred;
 	cred->cr_group_info = groups_alloc(slen);
 	if (cred->cr_group_info == NULL)
 		return SVC_DROP;
 	for (i = 0; i < slen; i++)
-		GROUP_AT(cred->cr_group_info, i) = ntohl(svc_getu32(argv));
+		GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv);
 
-	if (svc_getu32(argv) != RPC_AUTH_NULL || svc_getu32(argv) != 0) {
+	if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
 		*authp = rpc_autherr_badverf;
 		return SVC_DENIED;
 	}
 
 	/* Put NULL verifier */
-	svc_putu32(resv, RPC_AUTH_NULL);
-	svc_putu32(resv, 0);
+	svc_putnl(resv, RPC_AUTH_NULL);
+	svc_putnl(resv, 0);
 
 	return SVC_OK;