1 files changed, 139 insertions, 55 deletions

diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 207311610988..560677d187f1 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -18,6 +18,8 @@
 
 #include <linux/sunrpc/clnt.h>
 
+#include "netns.h"
+
 /*
  * AUTHUNIX and AUTHNULL credentials are both handled here.
  * AUTHNULL is treated just like AUTHUNIX except that the uid/gid
@@ -92,7 +94,6 @@ struct ip_map {
         struct unix_domain      *m_client;
         int                     m_add_change;
 };
-static struct cache_head        *ip_table[IP_HASHMAX];
 
 static void ip_map_put(struct kref *kref)
 {
@@ -178,8 +179,8 @@ static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
         return sunrpc_cache_pipe_upcall(cd, h, ip_map_request);
 }
 
-static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr);
-static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
+static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
+static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
 
 static int ip_map_parse(struct cache_detail *cd,
                           char *mesg, int mlen)
@@ -219,10 +220,9 @@ static int ip_map_parse(struct cache_detail *cd,
         switch (address.sa.sa_family) {
         case AF_INET:
                 /* Form a mapped IPv4 address in sin6 */
-                memset(&sin6, 0, sizeof(sin6));
                 sin6.sin6_family = AF_INET6;
-                sin6.sin6_addr.s6_addr32[2] = htonl(0xffff);
-                sin6.sin6_addr.s6_addr32[3] = address.s4.sin_addr.s_addr;
+                ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
+                                &sin6.sin6_addr);
                 break;
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
         case AF_INET6:
@@ -249,9 +249,9 @@ static int ip_map_parse(struct cache_detail *cd,
                 dom = NULL;
 
         /* IPv6 scope IDs are ignored for now */
-        ipmp = ip_map_lookup(class, &sin6.sin6_addr);
+        ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
         if (ipmp) {
-                err = ip_map_update(ipmp,
+                err = __ip_map_update(cd, ipmp,
                              container_of(dom, struct unix_domain, h),
                              expiry);
         } else
@@ -294,29 +294,15 @@ static int ip_map_show(struct seq_file *m,
 }
 
 
-struct cache_detail ip_map_cache = {
-        .owner          = THIS_MODULE,
-        .hash_size      = IP_HASHMAX,
-        .hash_table     = ip_table,
-        .name           = "auth.unix.ip",
-        .cache_put      = ip_map_put,
-        .cache_upcall   = ip_map_upcall,
-        .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 struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr)
+static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
+                struct in6_addr *addr)
 {
         struct ip_map ip;
         struct cache_head *ch;
 
         strcpy(ip.m_class, class);
         ipv6_addr_copy(&ip.m_addr, addr);
-        ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h,
+        ch = sunrpc_cache_lookup(cd, &ip.h,
                                  hash_str(class, IP_HASHBITS) ^
                                  hash_ip6(*addr));
 
@@ -326,7 +312,17 @@ static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr)
                 return NULL;
 }
 
-static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry)
+static inline struct ip_map *ip_map_lookup(struct net *net, char *class,
+                struct in6_addr *addr)
+{
+        struct sunrpc_net *sn;
+
+        sn = net_generic(net, sunrpc_net_id);
+        return __ip_map_lookup(sn->ip_map_cache, class, addr);
+}
+
+static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
+                struct unix_domain *udom, time_t expiry)
 {
         struct ip_map ip;
         struct cache_head *ch;
@@ -344,17 +340,25 @@ static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t ex
                         ip.m_add_change++;
         }
         ip.h.expiry_time = expiry;
-        ch = sunrpc_cache_update(&ip_map_cache,
-                                 &ip.h, &ipm->h,
+        ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
                                  hash_str(ipm->m_class, IP_HASHBITS) ^
                                  hash_ip6(ipm->m_addr));
         if (!ch)
                 return -ENOMEM;
-        cache_put(ch, &ip_map_cache);
+        cache_put(ch, cd);
         return 0;
 }
 
-int auth_unix_add_addr(struct in6_addr *addr, struct auth_domain *dom)
+static inline int ip_map_update(struct net *net, struct ip_map *ipm,
+                struct unix_domain *udom, time_t expiry)
+{
+        struct sunrpc_net *sn;
+
+        sn = net_generic(net, sunrpc_net_id);
+        return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry);
+}
+
+int auth_unix_add_addr(struct net *net, struct in6_addr *addr, struct auth_domain *dom)
 {
         struct unix_domain *udom;
         struct ip_map *ipmp;
@@ -362,10 +366,10 @@ int auth_unix_add_addr(struct in6_addr *addr, struct auth_domain *dom)
         if (dom->flavour != &svcauth_unix)
                 return -EINVAL;
         udom = container_of(dom, struct unix_domain, h);
-        ipmp = ip_map_lookup("nfsd", addr);
+        ipmp = ip_map_lookup(net, "nfsd", addr);
 
         if (ipmp)
-                return ip_map_update(ipmp, udom, NEVER);
+                return ip_map_update(net, ipmp, udom, NEVER);
         else
                 return -ENOMEM;
 }
@@ -383,16 +387,18 @@ int auth_unix_forget_old(struct auth_domain *dom)
 }
 EXPORT_SYMBOL_GPL(auth_unix_forget_old);
 
-struct auth_domain *auth_unix_lookup(struct in6_addr *addr)
+struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr)
 {
         struct ip_map *ipm;
         struct auth_domain *rv;
+        struct sunrpc_net *sn;
 
-        ipm = ip_map_lookup("nfsd", addr);
+        sn = net_generic(net, sunrpc_net_id);
+        ipm = ip_map_lookup(net, "nfsd", addr);
 
         if (!ipm)
                 return NULL;
-        if (cache_check(&ip_map_cache, &ipm->h, NULL))
+        if (cache_check(sn->ip_map_cache, &ipm->h, NULL))
                 return NULL;
 
         if ((ipm->m_client->addr_changes - ipm->m_add_change) >0) {
@@ -403,22 +409,29 @@ struct auth_domain *auth_unix_lookup(struct in6_addr *addr)
                 rv = &ipm->m_client->h;
                 kref_get(&rv->ref);
         }
-        cache_put(&ipm->h, &ip_map_cache);
+        cache_put(&ipm->h, sn->ip_map_cache);
         return rv;
 }
 EXPORT_SYMBOL_GPL(auth_unix_lookup);
 
 void svcauth_unix_purge(void)
 {
-        cache_purge(&ip_map_cache);
+        struct net *net;
+
+        for_each_net(net) {
+                struct sunrpc_net *sn;
+
+                sn = net_generic(net, sunrpc_net_id);
+                cache_purge(sn->ip_map_cache);
+        }
 }
 EXPORT_SYMBOL_GPL(svcauth_unix_purge);
 
 static inline struct ip_map *
-ip_map_cached_get(struct svc_rqst *rqstp)
+ip_map_cached_get(struct svc_xprt *xprt)
 {
         struct ip_map *ipm = NULL;
-        struct svc_xprt *xprt = rqstp->rq_xprt;
+        struct sunrpc_net *sn;
 
         if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
                 spin_lock(&xprt->xpt_lock);
@@ -430,9 +443,10 @@ ip_map_cached_get(struct svc_rqst *rqstp)
                                  * remembered, e.g. by a second mount from the
                                  * same IP address.
                                  */
+                                sn = net_generic(xprt->xpt_net, sunrpc_net_id);
                                 xprt->xpt_auth_cache = NULL;
                                 spin_unlock(&xprt->xpt_lock);
-                                cache_put(&ipm->h, &ip_map_cache);
+                                cache_put(&ipm->h, sn->ip_map_cache);
                                 return NULL;
                         }
                         cache_get(&ipm->h);
@@ -443,10 +457,8 @@ ip_map_cached_get(struct svc_rqst *rqstp)
 }
 
 static inline void
-ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm)
+ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
 {
-        struct svc_xprt *xprt = rqstp->rq_xprt;
-
         if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
                 spin_lock(&xprt->xpt_lock);
                 if (xprt->xpt_auth_cache == NULL) {
@@ -456,15 +468,26 @@ ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm)
                 }
                 spin_unlock(&xprt->xpt_lock);
         }
-        if (ipm)
-                cache_put(&ipm->h, &ip_map_cache);
+        if (ipm) {
+                struct sunrpc_net *sn;
+
+                sn = net_generic(xprt->xpt_net, sunrpc_net_id);
+                cache_put(&ipm->h, sn->ip_map_cache);
+        }
 }
 
 void
-svcauth_unix_info_release(void *info)
+svcauth_unix_info_release(struct svc_xprt *xpt)
 {
-        struct ip_map *ipm = info;
-        cache_put(&ipm->h, &ip_map_cache);
+        struct ip_map *ipm;
+
+        ipm = xpt->xpt_auth_cache;
+        if (ipm != NULL) {
+                struct sunrpc_net *sn;
+
+                sn = net_generic(xpt->xpt_net, sunrpc_net_id);
+                cache_put(&ipm->h, sn->ip_map_cache);
+        }
 }
 
 /****************************************************************************
@@ -674,6 +697,8 @@ static struct group_info *unix_gid_find(uid_t uid, struct svc_rqst *rqstp)
         switch (ret) {
         case -ENOENT:
                 return ERR_PTR(-ENOENT);
+        case -ETIMEDOUT:
+                return ERR_PTR(-ESHUTDOWN);
         case 0:
                 gi = get_group_info(ug->gi);
                 cache_put(&ug->h, &unix_gid_cache);
@@ -691,6 +716,9 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
         struct ip_map *ipm;
         struct group_info *gi;
         struct svc_cred *cred = &rqstp->rq_cred;
+        struct svc_xprt *xprt = rqstp->rq_xprt;
+        struct net *net = xprt->xpt_net;
+        struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
 
         switch (rqstp->rq_addr.ss_family) {
         case AF_INET:
@@ -709,26 +737,27 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
         if (rqstp->rq_proc == 0)
                 return SVC_OK;
 
-        ipm = ip_map_cached_get(rqstp);
+        ipm = ip_map_cached_get(xprt);
         if (ipm == NULL)
-                ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class,
+                ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
                                     &sin6->sin6_addr);
 
         if (ipm == NULL)
                 return SVC_DENIED;
 
-        switch (cache_check(&ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
+        switch (cache_check(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
                 default:
                         BUG();
-                case -EAGAIN:
                 case -ETIMEDOUT:
+                        return SVC_CLOSE;
+                case -EAGAIN:
                         return SVC_DROP;
                 case -ENOENT:
                         return SVC_DENIED;
                 case 0:
                         rqstp->rq_client = &ipm->m_client->h;
                         kref_get(&rqstp->rq_client->ref);
-                        ip_map_cached_put(rqstp, ipm);
+                        ip_map_cached_put(xprt, ipm);
                         break;
         }
 
@@ -736,6 +765,8 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
         switch (PTR_ERR(gi)) {
         case -EAGAIN:
                 return SVC_DROP;
+        case -ESHUTDOWN:
+                return SVC_CLOSE;
         case -ENOENT:
                 break;
         default:
@@ -776,7 +807,7 @@ svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
         cred->cr_gid = (gid_t) -1;
         cred->cr_group_info = groups_alloc(0);
         if (cred->cr_group_info == NULL)
-                return SVC_DROP; /* kmalloc failure - client must retry */
+                return SVC_CLOSE; /* kmalloc failure - client must retry */
 
         /* Put NULL verifier */
         svc_putnl(resv, RPC_AUTH_NULL);
@@ -840,7 +871,7 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
                 goto badcred;
         cred->cr_group_info = groups_alloc(slen);
         if (cred->cr_group_info == NULL)
-                return SVC_DROP;
+                return SVC_CLOSE;
         for (i = 0; i < slen; i++)
                 GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv);
         if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
@@ -886,3 +917,56 @@ struct auth_ops svcauth_unix = {
         .set_client     = svcauth_unix_set_client,
 };
 
+int ip_map_cache_create(struct net *net)
+{
+        int err = -ENOMEM;
+        struct cache_detail *cd;
+        struct cache_head **tbl;
+        struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+
+        cd = kzalloc(sizeof(struct cache_detail), GFP_KERNEL);
+        if (cd == NULL)
+                goto err_cd;
+
+        tbl = kzalloc(IP_HASHMAX * sizeof(struct cache_head *), GFP_KERNEL);
+        if (tbl == NULL)
+                goto err_tbl;
+
+        cd->owner = THIS_MODULE,
+        cd->hash_size = IP_HASHMAX,
+        cd->hash_table = tbl,
+        cd->name = "auth.unix.ip",
+        cd->cache_put = ip_map_put,
+        cd->cache_upcall = ip_map_upcall,
+        cd->cache_parse = ip_map_parse,
+        cd->cache_show = ip_map_show,
+        cd->match = ip_map_match,
+        cd->init = ip_map_init,
+        cd->update = update,
+        cd->alloc = ip_map_alloc,
+
+        err = cache_register_net(cd, net);
+        if (err)
+                goto err_reg;
+
+        sn->ip_map_cache = cd;
+        return 0;
+
+err_reg:
+        kfree(tbl);
+err_tbl:
+        kfree(cd);
+err_cd:
+        return err;
+}
+
+void ip_map_cache_destroy(struct net *net)
+{
+        struct sunrpc_net *sn;
+
+        sn = net_generic(net, sunrpc_net_id);
+        cache_purge(sn->ip_map_cache);
+        cache_unregister_net(sn->ip_map_cache, net);
+        kfree(sn->ip_map_cache->hash_table);
+        kfree(sn->ip_map_cache);
+}