Merge branch 'for-3.5-take-2' of git://linux-nfs.org/~bfields/linux

Pull nfsd update from Bruce Fields.

* 'for-3.5-take-2' of git://linux-nfs.org/~bfields/linux: (23 commits)
  nfsd: trivial: use SEEK_SET instead of 0 in vfs_llseek
  SUNRPC: split upcall function to extract reusable parts
  nfsd: allocate id-to-name and name-to-id caches in per-net operations.
  nfsd: make name-to-id cache allocated per network namespace context
  nfsd: make id-to-name cache allocated per network namespace context
  nfsd: pass network context to idmap init/exit functions
  nfsd: allocate export and expkey caches in per-net operations.
  nfsd: make expkey cache allocated per network namespace context
  nfsd: make export cache allocated per network namespace context
  nfsd: pass pointer to export cache down to stack wherever possible.
  nfsd: pass network context to export caches init/shutdown routines
  Lockd: pass network namespace to creation and destruction routines
  NFSd: remove hard-coded dereferences to name-to-id and id-to-name caches
  nfsd: pass pointer to expkey cache down to stack wherever possible.
  nfsd: use hash table from cache detail in nfsd export seq ops
  nfsd: pass svc_export_cache pointer as private data to "exports" seq file ops
  nfsd: use exp_put() for svc_export_cache put
  nfsd: use cache detail pointer from svc_export structure on cache put
  nfsd: add link to owner cache detail to svc_export structure
  nfsd: use passed cache_detail pointer expkey_parse()
  ...

16 files changed, 322 insertions, 209 deletions

diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index ba1dc2eebd1e..ca0a08001449 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -56,7 +56,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
         u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
         int status;
 
-        status = lockd_up();
+        status = lockd_up(nlm_init->net);
         if (status < 0)
                 return ERR_PTR(status);
 
@@ -65,7 +65,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
                                    nlm_init->hostname, nlm_init->noresvport,
                                    nlm_init->net);
         if (host == NULL) {
-                lockd_down();
+                lockd_down(nlm_init->net);
                 return ERR_PTR(-ENOLCK);
         }
 
@@ -80,8 +80,10 @@ EXPORT_SYMBOL_GPL(nlmclnt_init);
  */
 void nlmclnt_done(struct nlm_host *host)
 {
+        struct net *net = host->net;
+
         nlmclnt_release_host(host);
-        lockd_down();
+        lockd_down(net);
 }
 EXPORT_SYMBOL_GPL(nlmclnt_done);
 
@@ -220,11 +222,12 @@ reclaimer(void *ptr)
         struct nlm_wait   *block;
         struct file_lock *fl, *next;
         u32 nsmstate;
+        struct net *net = host->net;
 
         allow_signal(SIGKILL);
 
         down_write(&host->h_rwsem);
-        lockd_up();     /* note: this cannot fail as lockd is already running */
+        lockd_up(net);  /* note: this cannot fail as lockd is already running */
 
         dprintk("lockd: reclaiming locks for host %s\n", host->h_name);
 
@@ -275,6 +278,6 @@ restart:
 
         /* Release host handle after use */
         nlmclnt_release_host(host);
-        lockd_down();
+        lockd_down(net);
         return 0;
 }
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index f49b9afc4436..1ead0750cdbb 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -295,11 +295,10 @@ static void lockd_down_net(struct net *net)
 /*
  * Bring up the lockd process if it's not already up.
  */
-int lockd_up(void)
+int lockd_up(struct net *net)
 {
         struct svc_serv *serv;
         int             error = 0;
-        struct net *net = current->nsproxy->net_ns;
 
         mutex_lock(&nlmsvc_mutex);
         /*
@@ -378,12 +377,12 @@ EXPORT_SYMBOL_GPL(lockd_up);
  * Decrement the user count and bring down lockd if we're the last.
  */
 void
-lockd_down(void)
+lockd_down(struct net *net)
 {
         mutex_lock(&nlmsvc_mutex);
         if (nlmsvc_users) {
                 if (--nlmsvc_users) {
-                        lockd_down_net(current->nsproxy->net_ns);
+                        lockd_down_net(net);
                         goto out;
                 }
         } else {
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 8e9689abbc0c..dcb52b884519 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -15,11 +15,13 @@
 #include <linux/namei.h>
 #include <linux/module.h>
 #include <linux/exportfs.h>
+#include <linux/sunrpc/svc_xprt.h>
 
 #include <net/ipv6.h>
 
 #include "nfsd.h"
 #include "nfsfh.h"
+#include "netns.h"
 
 #define NFSDDBG_FACILITY        NFSDDBG_EXPORT
 
@@ -38,7 +40,6 @@ typedef struct svc_export	svc_export;
 #define EXPKEY_HASHBITS         8
 #define EXPKEY_HASHMAX          (1 << EXPKEY_HASHBITS)
 #define EXPKEY_HASHMASK         (EXPKEY_HASHMAX -1)
-static struct cache_head *expkey_table[EXPKEY_HASHMAX];
 
 static void expkey_put(struct kref *ref)
 {
@@ -71,9 +72,9 @@ static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
         return sunrpc_cache_pipe_upcall(cd, h, expkey_request);
 }
 
-static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old);
-static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *);
-static struct cache_detail svc_expkey_cache;
+static struct svc_expkey *svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
+                                            struct svc_expkey *old);
+static struct svc_expkey *svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *);
 
 static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
 {
@@ -131,7 +132,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
         key.ek_fsidtype = fsidtype;
         memcpy(key.ek_fsid, buf, len);
 
-        ek = svc_expkey_lookup(&key);
+        ek = svc_expkey_lookup(cd, &key);
         err = -ENOMEM;
         if (!ek)
                 goto out;
@@ -145,7 +146,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
         err = 0;
         if (len == 0) {
                 set_bit(CACHE_NEGATIVE, &key.h.flags);
-                ek = svc_expkey_update(&key, ek);
+                ek = svc_expkey_update(cd, &key, ek);
                 if (!ek)
                         err = -ENOMEM;
         } else {
@@ -155,7 +156,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
 
                 dprintk("Found the path %s\n", buf);
 
-                ek = svc_expkey_update(&key, ek);
+                ek = svc_expkey_update(cd, &key, ek);
                 if (!ek)
                         err = -ENOMEM;
                 path_put(&key.ek_path);
@@ -163,7 +164,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
         cache_flush();
  out:
         if (ek)
-                cache_put(&ek->h, &svc_expkey_cache);
+                cache_put(&ek->h, cd);
         if (dom)
                 auth_domain_put(dom);
         kfree(buf);
@@ -239,10 +240,9 @@ static struct cache_head *expkey_alloc(void)
                 return NULL;
 }
 
-static struct cache_detail svc_expkey_cache = {
+static struct cache_detail svc_expkey_cache_template = {
         .owner          = THIS_MODULE,
         .hash_size      = EXPKEY_HASHMAX,
-        .hash_table     = expkey_table,
         .name           = "nfsd.fh",
         .cache_put      = expkey_put,
         .cache_upcall   = expkey_upcall,
@@ -268,13 +268,12 @@ svc_expkey_hash(struct svc_expkey *item)
 }
 
 static struct svc_expkey *
-svc_expkey_lookup(struct svc_expkey *item)
+svc_expkey_lookup(struct cache_detail *cd, struct svc_expkey *item)
 {
         struct cache_head *ch;
         int hash = svc_expkey_hash(item);
 
-        ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h,
-                                 hash);
+        ch = sunrpc_cache_lookup(cd, &item->h, hash);
         if (ch)
                 return container_of(ch, struct svc_expkey, h);
         else
@@ -282,13 +281,13 @@ svc_expkey_lookup(struct svc_expkey *item)
 }
 
 static struct svc_expkey *
-svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
+svc_expkey_update(struct cache_detail *cd, struct svc_expkey *new,
+                  struct svc_expkey *old)
 {
         struct cache_head *ch;
         int hash = svc_expkey_hash(new);
 
-        ch = sunrpc_cache_update(&svc_expkey_cache, &new->h,
-                                 &old->h, hash);
+        ch = sunrpc_cache_update(cd, &new->h, &old->h, hash);
         if (ch)
                 return container_of(ch, struct svc_expkey, h);
         else
@@ -299,8 +298,6 @@ svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
 #define EXPORT_HASHBITS         8
 #define EXPORT_HASHMAX          (1<< EXPORT_HASHBITS)
 
-static struct cache_head *export_table[EXPORT_HASHMAX];
-
 static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
 {
         int i;
@@ -525,6 +522,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
                 goto out1;
 
         exp.ex_client = dom;
+        exp.cd = cd;
 
         /* expiry */
         err = -EINVAL;
@@ -672,6 +670,7 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
         new->ex_fslocs.locations = NULL;
         new->ex_fslocs.locations_count = 0;
         new->ex_fslocs.migrated = 0;
+        new->cd = item->cd;
 }
 
 static void export_update(struct cache_head *cnew, struct cache_head *citem)
@@ -707,10 +706,9 @@ static struct cache_head *svc_export_alloc(void)
                 return NULL;
 }
 
-struct cache_detail svc_export_cache = {
+struct cache_detail svc_export_cache_template = {
         .owner          = THIS_MODULE,
         .hash_size      = EXPORT_HASHMAX,
-        .hash_table     = export_table,
         .name           = "nfsd.export",
         .cache_put      = svc_export_put,
         .cache_upcall   = svc_export_upcall,
@@ -739,8 +737,7 @@ svc_export_lookup(struct svc_export *exp)
         struct cache_head *ch;
         int hash = svc_export_hash(exp);
 
-        ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
-                                 hash);
+        ch = sunrpc_cache_lookup(exp->cd, &exp->h, hash);
         if (ch)
                 return container_of(ch, struct svc_export, h);
         else
@@ -753,9 +750,7 @@ svc_export_update(struct svc_export *new, struct svc_export *old)
         struct cache_head *ch;
         int hash = svc_export_hash(old);
 
-        ch = sunrpc_cache_update(&svc_export_cache, &new->h,
-                                 &old->h,
-                                 hash);
+        ch = sunrpc_cache_update(old->cd, &new->h, &old->h, hash);
         if (ch)
                 return container_of(ch, struct svc_export, h);
         else
@@ -764,7 +759,8 @@ svc_export_update(struct svc_export *new, struct svc_export *old)
 
 
 static struct svc_expkey *
-exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
+exp_find_key(struct cache_detail *cd, svc_client *clp, int fsid_type,
+             u32 *fsidv, struct cache_req *reqp)
 {
         struct svc_expkey key, *ek;
         int err;
@@ -776,18 +772,18 @@ exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
         key.ek_fsidtype = fsid_type;
         memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
 
-        ek = svc_expkey_lookup(&key);
+        ek = svc_expkey_lookup(cd, &key);
         if (ek == NULL)
                 return ERR_PTR(-ENOMEM);
-        err = cache_check(&svc_expkey_cache, &ek->h, reqp);
+        err = cache_check(cd, &ek->h, reqp);
         if (err)
                 return ERR_PTR(err);
         return ek;
 }
 
 
-static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
-                                     struct cache_req *reqp)
+static svc_export *exp_get_by_name(struct cache_detail *cd, svc_client *clp,
+                                   const struct path *path, struct cache_req *reqp)
 {
         struct svc_export *exp, key;
         int err;
@@ -797,11 +793,12 @@ static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
 
         key.ex_client = clp;
         key.ex_path = *path;
+        key.cd = cd;
 
         exp = svc_export_lookup(&key);
         if (exp == NULL)
                 return ERR_PTR(-ENOMEM);
-        err = cache_check(&svc_export_cache, &exp->h, reqp);
+        err = cache_check(cd, &exp->h, reqp);
         if (err)
                 return ERR_PTR(err);
         return exp;
@@ -810,16 +807,17 @@ static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
 /*
  * Find the export entry for a given dentry.
  */
-static struct svc_export *exp_parent(svc_client *clp, struct path *path)
+static struct svc_export *exp_parent(struct cache_detail *cd, svc_client *clp,
+                                     struct path *path)
 {
         struct dentry *saved = dget(path->dentry);
-        svc_export *exp = exp_get_by_name(clp, path, NULL);
+        svc_export *exp = exp_get_by_name(cd, clp, path, NULL);
 
         while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {
                 struct dentry *parent = dget_parent(path->dentry);
                 dput(path->dentry);
                 path->dentry = parent;
-                exp = exp_get_by_name(clp, path, NULL);
+                exp = exp_get_by_name(cd, clp, path, NULL);
         }
         dput(path->dentry);
         path->dentry = saved;
@@ -834,13 +832,16 @@ static struct svc_export *exp_parent(svc_client *clp, struct path *path)
  * since its harder to fool a kernel module than a user space program.
  */
 int
-exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
+exp_rootfh(struct net *net, svc_client *clp, char *name,
+           struct knfsd_fh *f, int maxsize)
 {
         struct svc_export       *exp;
         struct path             path;
         struct inode            *inode;
         struct svc_fh           fh;
         int                     err;
+        struct nfsd_net         *nn = net_generic(net, nfsd_net_id);
+        struct cache_detail     *cd = nn->svc_export_cache;
 
         err = -EPERM;
         /* NB: we probably ought to check that it's NUL-terminated */
@@ -853,7 +854,7 @@ exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize)
         dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
                  name, path.dentry, clp->name,
                  inode->i_sb->s_id, inode->i_ino);
-        exp = exp_parent(clp, &path);
+        exp = exp_parent(cd, clp, &path);
         if (IS_ERR(exp)) {
                 err = PTR_ERR(exp);
                 goto out;
@@ -875,16 +876,18 @@ out:
         return err;
 }
 
-static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type,
+static struct svc_export *exp_find(struct cache_detail *cd,
+                                   struct auth_domain *clp, int fsid_type,
                                    u32 *fsidv, struct cache_req *reqp)
 {
         struct svc_export *exp;
-        struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
+        struct nfsd_net *nn = net_generic(cd->net, nfsd_net_id);
+        struct svc_expkey *ek = exp_find_key(nn->svc_expkey_cache, clp, fsid_type, fsidv, reqp);
         if (IS_ERR(ek))
                 return ERR_CAST(ek);
 
-        exp = exp_get_by_name(clp, &ek->ek_path, reqp);
-        cache_put(&ek->h, &svc_expkey_cache);
+        exp = exp_get_by_name(cd, clp, &ek->ek_path, reqp);
+        cache_put(&ek->h, nn->svc_expkey_cache);
 
         if (IS_ERR(exp))
                 return ERR_CAST(exp);
@@ -926,12 +929,14 @@ struct svc_export *
 rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path)
 {
         struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
+        struct nfsd_net *nn = net_generic(rqstp->rq_xprt->xpt_net, nfsd_net_id);
+        struct cache_detail *cd = nn->svc_export_cache;
 
         if (rqstp->rq_client == NULL)
                 goto gss;
 
         /* First try the auth_unix client: */
-        exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle);
+        exp = exp_get_by_name(cd, rqstp->rq_client, path, &rqstp->rq_chandle);
         if (PTR_ERR(exp) == -ENOENT)
                 goto gss;
         if (IS_ERR(exp))
@@ -943,7 +948,7 @@ gss:
         /* Otherwise, try falling back on gss client */
         if (rqstp->rq_gssclient == NULL)
                 return exp;
-        gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle);
+        gssexp = exp_get_by_name(cd, rqstp->rq_gssclient, path, &rqstp->rq_chandle);
         if (PTR_ERR(gssexp) == -ENOENT)
                 return exp;
         if (!IS_ERR(exp))
@@ -955,12 +960,15 @@ struct svc_export *
 rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
 {
         struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
+        struct nfsd_net *nn = net_generic(rqstp->rq_xprt->xpt_net, nfsd_net_id);
+        struct cache_detail *cd = nn->svc_export_cache;
 
         if (rqstp->rq_client == NULL)
                 goto gss;
 
         /* First try the auth_unix client: */
-        exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle);
+        exp = exp_find(cd, rqstp->rq_client, fsid_type,
+                       fsidv, &rqstp->rq_chandle);
         if (PTR_ERR(exp) == -ENOENT)
                 goto gss;
         if (IS_ERR(exp))
@@ -972,7 +980,7 @@ gss:
         /* Otherwise, try falling back on gss client */
         if (rqstp->rq_gssclient == NULL)
                 return exp;
-        gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv,
+        gssexp = exp_find(cd, rqstp->rq_gssclient, fsid_type, fsidv,
                                                 &rqstp->rq_chandle);
         if (PTR_ERR(gssexp) == -ENOENT)
                 return exp;
@@ -1029,13 +1037,15 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
 /* Iterator */
 
 static void *e_start(struct seq_file *m, loff_t *pos)
-        __acquires(svc_export_cache.hash_lock)
+        __acquires(((struct cache_detail *)m->private)->hash_lock)
 {
         loff_t n = *pos;
         unsigned hash, export;
         struct cache_head *ch;
-        
-        read_lock(&svc_export_cache.hash_lock);
+        struct cache_detail *cd = m->private;
+        struct cache_head **export_table = cd->hash_table;
+
+        read_lock(&cd->hash_lock);
         if (!n--)
                 return SEQ_START_TOKEN;
         hash = n >> 32;
@@ -1060,6 +1070,8 @@ static void *e_next(struct seq_file *m, void *p, loff_t *pos)
 {
         struct cache_head *ch = p;
         int hash = (*pos >> 32);
+        struct cache_detail *cd = m->private;
+        struct cache_head **export_table = cd->hash_table;
 
         if (p == SEQ_START_TOKEN)
                 hash = 0;
@@ -1082,9 +1094,11 @@ static void *e_next(struct seq_file *m, void *p, loff_t *pos)
 }
 
 static void e_stop(struct seq_file *m, void *p)
-        __releases(svc_export_cache.hash_lock)
+        __releases(((struct cache_detail *)m->private)->hash_lock)
 {
-        read_unlock(&svc_export_cache.hash_lock);
+        struct cache_detail *cd = m->private;
+
+        read_unlock(&cd->hash_lock);
 }
 
 static struct flags {
@@ -1195,6 +1209,7 @@ static int e_show(struct seq_file *m, void *p)
 {
         struct cache_head *cp = p;
         struct svc_export *exp = container_of(cp, struct svc_export, h);
+        struct cache_detail *cd = m->private;
 
         if (p == SEQ_START_TOKEN) {
                 seq_puts(m, "# Version 1.1\n");
@@ -1203,10 +1218,10 @@ static int e_show(struct seq_file *m, void *p)
         }
 
         cache_get(&exp->h);
-        if (cache_check(&svc_export_cache, &exp->h, NULL))
+        if (cache_check(cd, &exp->h, NULL))
                 return 0;
-        cache_put(&exp->h, &svc_export_cache);
-        return svc_export_show(m, &svc_export_cache, cp);
+        exp_put(exp);
+        return svc_export_show(m, cd, cp);
 }
 
 const struct seq_operations nfs_exports_op = {
@@ -1216,48 +1231,70 @@ const struct seq_operations nfs_exports_op = {
         .show   = e_show,
 };
 
-
 /*
  * Initialize the exports module.
  */
 int
-nfsd_export_init(void)
+nfsd_export_init(struct net *net)
 {
         int rv;
-        dprintk("nfsd: initializing export module.\n");
+        struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+        dprintk("nfsd: initializing export module (net: %p).\n", net);
 
-        rv = cache_register_net(&svc_export_cache, &init_net);
+        nn->svc_export_cache = cache_create_net(&svc_export_cache_template, net);
+        if (IS_ERR(nn->svc_export_cache))
+                return PTR_ERR(nn->svc_export_cache);
+        rv = cache_register_net(nn->svc_export_cache, net);
         if (rv)
-                return rv;
-        rv = cache_register_net(&svc_expkey_cache, &init_net);
+                goto destroy_export_cache;
+
+        nn->svc_expkey_cache = cache_create_net(&svc_expkey_cache_template, net);
+        if (IS_ERR(nn->svc_expkey_cache)) {
+                rv = PTR_ERR(nn->svc_expkey_cache);
+                goto unregister_export_cache;
+        }
+        rv = cache_register_net(nn->svc_expkey_cache, net);
         if (rv)
-                cache_unregister_net(&svc_export_cache, &init_net);
-        return rv;
+                goto destroy_expkey_cache;
+        return 0;
 
+destroy_expkey_cache:
+        cache_destroy_net(nn->svc_expkey_cache, net);
+unregister_export_cache:
+        cache_unregister_net(nn->svc_export_cache, net);
+destroy_export_cache:
+        cache_destroy_net(nn->svc_export_cache, net);
+        return rv;
 }
 
 /*
  * Flush exports table - called when last nfsd thread is killed
  */
 void
-nfsd_export_flush(void)
+nfsd_export_flush(struct net *net)
 {
-        cache_purge(&svc_expkey_cache);
-        cache_purge(&svc_export_cache);
+        struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+        cache_purge(nn->svc_expkey_cache);
+        cache_purge(nn->svc_export_cache);
 }
 
 /*
  * Shutdown the exports module.
  */
 void
-nfsd_export_shutdown(void)
+nfsd_export_shutdown(struct net *net)
 {
+        struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
-        dprintk("nfsd: shutting down export module.\n");
+        dprintk("nfsd: shutting down export module (net: %p).\n", net);
 
-        cache_unregister_net(&svc_expkey_cache, &init_net);
-        cache_unregister_net(&svc_export_cache, &init_net);
-        svcauth_unix_purge();
+        cache_unregister_net(nn->svc_expkey_cache, net);
+        cache_unregister_net(nn->svc_export_cache, net);
+        cache_destroy_net(nn->svc_expkey_cache, net);
+        cache_destroy_net(nn->svc_export_cache, net);
+        svcauth_unix_purge(net);
 
-        dprintk("nfsd: export shutdown complete.\n");
+        dprintk("nfsd: export shutdown complete (net: %p).\n", net);
 }
diff --git a/fs/nfsd/idmap.h b/fs/nfsd/idmap.h
index 2f3be1321534..9d513efc01ba 100644
--- a/fs/nfsd/idmap.h
+++ b/fs/nfsd/idmap.h
@@ -42,14 +42,14 @@
 #define IDMAP_NAMESZ 128
 
 #ifdef CONFIG_NFSD_V4
-int nfsd_idmap_init(void);
-void nfsd_idmap_shutdown(void);
+int nfsd_idmap_init(struct net *);
+void nfsd_idmap_shutdown(struct net *);
 #else
-static inline int nfsd_idmap_init(void)
+static inline int nfsd_idmap_init(struct net *net)
 {
         return 0;
 }
-static inline void nfsd_idmap_shutdown(void)
+static inline void nfsd_idmap_shutdown(struct net *net)
 {
 }
 #endif
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 12e0cff435b4..39365636b244 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -28,6 +28,12 @@ struct cld_net;
 
 struct nfsd_net {
         struct cld_net *cld_net;
+
+        struct cache_detail *svc_expkey_cache;
+        struct cache_detail *svc_export_cache;
+
+        struct cache_detail *idtoname_cache;
+        struct cache_detail *nametoid_cache;
 };
 
 extern int nfsd_net_id;
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 322d11ce06a4..286a7f8f2024 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -36,9 +36,11 @@
 #include <linux/seq_file.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/sunrpc/svc_xprt.h>
 #include <net/net_namespace.h>
 #include "idmap.h"
 #include "nfsd.h"
+#include "netns.h"
 
 /*
  * Turn off idmapping when using AUTH_SYS.
@@ -107,8 +109,6 @@ ent_alloc(void)
  * ID -> Name cache
  */
 
-static struct cache_head *idtoname_table[ENT_HASHMAX];
-
 static uint32_t
 idtoname_hash(struct ent *ent)
 {
@@ -183,13 +183,13 @@ 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 = {
+static struct cache_detail idtoname_cache_template = {
         .owner          = THIS_MODULE,
         .hash_size      = ENT_HASHMAX,
-        .hash_table     = idtoname_table,
         .name           = "nfs4.idtoname",
         .cache_put      = ent_put,
         .cache_upcall   = idtoname_upcall,
@@ -244,7 +244,7 @@ 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 +260,11 @@ 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 +275,9 @@ 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 +286,9 @@ 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);
@@ -303,8 +301,6 @@ idtoname_update(struct ent *new, struct ent *old)
  * Name -> ID cache
  */
 
-static struct cache_head *nametoid_table[ENT_HASHMAX];
-
 static inline int
 nametoid_hash(struct ent *ent)
 {
@@ -359,14 +355,14 @@ 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 = {
+static struct cache_detail nametoid_cache_template = {
         .owner          = THIS_MODULE,
         .hash_size      = ENT_HASHMAX,
-        .hash_table     = nametoid_table,
         .name           = "nfs4.nametoid",
         .cache_put      = ent_put,
         .cache_upcall   = nametoid_upcall,
@@ -426,14 +422,14 @@ 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 +439,9 @@ 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 +450,9 @@ 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);
@@ -471,34 +465,55 @@ nametoid_update(struct ent *new, struct ent *old)
  */
 
 int
-nfsd_idmap_init(void)
+nfsd_idmap_init(struct net *net)
 {
         int rv;
+        struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
-        rv = cache_register_net(&idtoname_cache, &init_net);
+        nn->idtoname_cache = cache_create_net(&idtoname_cache_template, net);
+        if (IS_ERR(nn->idtoname_cache))
+                return PTR_ERR(nn->idtoname_cache);
+        rv = cache_register_net(nn->idtoname_cache, net);
         if (rv)
-                return rv;
-        rv = cache_register_net(&nametoid_cache, &init_net);
+                goto destroy_idtoname_cache;
+        nn->nametoid_cache = cache_create_net(&nametoid_cache_template, net);
+        if (IS_ERR(nn->nametoid_cache)) {
+                rv = PTR_ERR(nn->idtoname_cache);
+                goto unregister_idtoname_cache;
+        }
+        rv = cache_register_net(nn->nametoid_cache, net);
         if (rv)
-                cache_unregister_net(&idtoname_cache, &init_net);
+                goto destroy_nametoid_cache;
+        return 0;
+
+destroy_nametoid_cache:
+        cache_destroy_net(nn->nametoid_cache, net);
+unregister_idtoname_cache:
+        cache_unregister_net(nn->idtoname_cache, net);
+destroy_idtoname_cache:
+        cache_destroy_net(nn->idtoname_cache, net);
         return rv;
 }
 
 void
-nfsd_idmap_shutdown(void)
+nfsd_idmap_shutdown(struct net *net)
 {
-        cache_unregister_net(&idtoname_cache, &init_net);
-        cache_unregister_net(&nametoid_cache, &init_net);
+        struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+        cache_unregister_net(nn->idtoname_cache, net);
+        cache_unregister_net(nn->nametoid_cache, net);
+        cache_destroy_net(nn->idtoname_cache, net);
+        cache_destroy_net(nn->nametoid_cache, net);
 }
 
 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 +521,7 @@ 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);
@@ -531,19 +546,20 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
                 .type = type,
         };
         int ret;
+        struct nfsd_net *nn = net_generic(rqstp->rq_xprt->xpt_net, nfsd_net_id);
 
         if (namelen + 1 > sizeof(key.name))
                 return nfserr_badowner;
         memcpy(key.name, name, namelen);
         key.name[namelen] = '\0';
         strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
-        ret = idmap_lookup(rqstp, nametoid_lookup, &key, &nametoid_cache, &item);
+        ret = idmap_lookup(rqstp, nametoid_lookup, &key, nn->nametoid_cache, &item);
         if (ret == -ENOENT)
                 return nfserr_badowner;
         if (ret)
                 return nfserrno(ret);
         *id = item->id;
-        cache_put(&item->h, &nametoid_cache);
+        cache_put(&item->h, nn->nametoid_cache);
         return 0;
 }
 
@@ -555,9 +571,10 @@ idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
                 .type = type,
         };
         int ret;
+        struct nfsd_net *nn = net_generic(rqstp->rq_xprt->xpt_net, nfsd_net_id);
 
         strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
-        ret = idmap_lookup(rqstp, idtoname_lookup, &key, &idtoname_cache, &item);
+        ret = idmap_lookup(rqstp, idtoname_lookup, &key, nn->idtoname_cache, &item);
         if (ret == -ENOENT)
                 return sprintf(name, "%u", id);
         if (ret)
@@ -565,7 +582,7 @@ 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);
+        cache_put(&item->h, nn->idtoname_cache);
         return ret;
 }
 
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 7f71c69cdcdf..03f82c0bc35d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3155,10 +3155,17 @@ out:
 static struct lock_manager nfsd4_manager = {
 };
 
+static bool grace_ended;
+
 static void
 nfsd4_end_grace(void)
 {
+        /* do nothing if grace period already ended */
+        if (grace_ended)
+                return;
+
         dprintk("NFSD: end of grace period\n");
+        grace_ended = true;
         nfsd4_record_grace_done(&init_net, boot_time);
         locks_end_grace(&nfsd4_manager);
         /*
@@ -3183,8 +3190,7 @@ nfs4_laundromat(void)
         nfs4_lock_state();
 
         dprintk("NFSD: laundromat service - starting\n");
-        if (locks_in_grace())
-                nfsd4_end_grace();
+        nfsd4_end_grace();
         INIT_LIST_HEAD(&reaplist);
         spin_lock(&client_lock);
         list_for_each_safe(pos, next, &client_lru) {
@@ -4055,7 +4061,6 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
         struct nfs4_openowner *open_sop = NULL;
         struct nfs4_lockowner *lock_sop = NULL;
         struct nfs4_ol_stateid *lock_stp;
-        struct nfs4_file *fp;
         struct file *filp = NULL;
         struct file_lock file_lock;
         struct file_lock conflock;
@@ -4123,7 +4128,6 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
                         goto out;
         }
         lock_sop = lockowner(lock_stp->st_stateowner);
-        fp = lock_stp->st_file;
 
         lkflg = setlkflg(lock->lk_type);
         status = nfs4_check_openmode(lock_stp, lkflg);
@@ -4715,6 +4719,7 @@ nfs4_state_start(void)
         nfsd4_client_tracking_init(&init_net);
         boot_time = get_seconds();
         locks_start_grace(&nfsd4_manager);
+        grace_ended = false;
         printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
                nfsd4_grace);
         ret = set_callback_cred();
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 2c53be6d3579..72699885ac48 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -127,7 +127,17 @@ static const struct file_operations transaction_ops = {
 
 static int exports_open(struct inode *inode, struct file *file)
 {
-        return seq_open(file, &nfs_exports_op);
+        int err;
+        struct seq_file *seq;
+        struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+
+        err = seq_open(file, &nfs_exports_op);
+        if (err)
+                return err;
+
+        seq = file->private_data;
+        seq->private = nn->svc_export_cache;
+        return 0;
 }
 
 static const struct file_operations exports_operations = {
@@ -345,7 +355,7 @@ static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
         if (!dom)
                 return -ENOMEM;
 
-        len = exp_rootfh(dom, path, &fh,  maxsize);
+        len = exp_rootfh(&init_net, dom, path, &fh,  maxsize);
         auth_domain_put(dom);
         if (len)
                 return len;
@@ -1127,7 +1137,34 @@ static int create_proc_exports_entry(void)
 #endif
 
 int nfsd_net_id;
+
+static __net_init int nfsd_init_net(struct net *net)
+{
+        int retval;
+
+        retval = nfsd_export_init(net);
+        if (retval)
+                goto out_export_error;
+        retval = nfsd_idmap_init(net);
+        if (retval)
+                goto out_idmap_error;
+        return 0;
+
+out_idmap_error:
+        nfsd_export_shutdown(net);
+out_export_error:
+        return retval;
+}
+
+static __net_exit void nfsd_exit_net(struct net *net)
+{
+        nfsd_idmap_shutdown(net);
+        nfsd_export_shutdown(net);
+}
+
 static struct pernet_operations nfsd_net_ops = {
+        .init = nfsd_init_net,
+        .exit = nfsd_exit_net,
         .id   = &nfsd_net_id,
         .size = sizeof(struct nfsd_net),
 };
@@ -1154,16 +1191,10 @@ static int __init init_nfsd(void)
         retval = nfsd_reply_cache_init();
         if (retval)
                 goto out_free_stat;
-        retval = nfsd_export_init();
-        if (retval)
-                goto out_free_cache;
         nfsd_lockd_init();      /* lockd->nfsd callbacks */
-        retval = nfsd_idmap_init();
-        if (retval)
-                goto out_free_lockd;
         retval = create_proc_exports_entry();
         if (retval)
-                goto out_free_idmap;
+                goto out_free_lockd;
         retval = register_filesystem(&nfsd_fs_type);
         if (retval)
                 goto out_free_all;
@@ -1171,12 +1202,8 @@ static int __init init_nfsd(void)
 out_free_all:
         remove_proc_entry("fs/nfs/exports", NULL);
         remove_proc_entry("fs/nfs", NULL);
-out_free_idmap:
-        nfsd_idmap_shutdown();
 out_free_lockd:
         nfsd_lockd_shutdown();
-        nfsd_export_shutdown();
-out_free_cache:
         nfsd_reply_cache_shutdown();
 out_free_stat:
         nfsd_stat_shutdown();
@@ -1192,13 +1219,11 @@ out_unregister_notifier:
 
 static void __exit exit_nfsd(void)
 {
-        nfsd_export_shutdown();
         nfsd_reply_cache_shutdown();
         remove_proc_entry("fs/nfs/exports", NULL);
         remove_proc_entry("fs/nfs", NULL);
         nfsd_stat_shutdown();
         nfsd_lockd_shutdown();
-        nfsd_idmap_shutdown();
         nfsd4_free_slabs();
         nfsd_fault_inject_cleanup();
         unregister_filesystem(&nfsd_fs_type);
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 68454e75fce9..cc793005a87c 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -636,7 +636,7 @@ fh_put(struct svc_fh *fhp)
 #endif
         }
         if (exp) {
-                cache_put(&exp->h, &svc_export_cache);
+                exp_put(exp);
                 fhp->fh_export = NULL;
         }
         return;
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 28dfad39f0c5..cb4d51d8cbdb 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -220,7 +220,7 @@ static int nfsd_startup(unsigned short port, int nrservs)
         ret = nfsd_init_socks(port);
         if (ret)
                 goto out_racache;
-        ret = lockd_up();
+        ret = lockd_up(&init_net);
         if (ret)
                 goto out_racache;
         ret = nfs4_state_start();
@@ -229,7 +229,7 @@ static int nfsd_startup(unsigned short port, int nrservs)
         nfsd_up = true;
         return 0;
 out_lockd:
-        lockd_down();
+        lockd_down(&init_net);
 out_racache:
         nfsd_racache_shutdown();
         return ret;
@@ -246,7 +246,7 @@ static void nfsd_shutdown(void)
         if (!nfsd_up)
                 return;
         nfs4_state_shutdown();
-        lockd_down();
+        lockd_down(&init_net);
         nfsd_racache_shutdown();
         nfsd_up = false;
 }
@@ -261,7 +261,7 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
 
         printk(KERN_WARNING "nfsd: last server has exited, flushing export "
                             "cache\n");
-        nfsd_export_flush();
+        nfsd_export_flush(net);
 }
 
 void nfsd_reset_versions(void)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 568666156ea4..c8bd9c3be7f7 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -2039,7 +2039,7 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp,
         if (err)
                 goto out;
 
-        offset = vfs_llseek(file, offset, 0);
+        offset = vfs_llseek(file, offset, SEEK_SET);
         if (offset < 0) {
                 err = nfserrno((int)offset);
                 goto out_close;
diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index 11a966e5f829..4d24d64578c4 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -54,7 +54,7 @@ extern void	nlmclnt_done(struct nlm_host *host);
 
 extern int      nlmclnt_proc(struct nlm_host *host, int cmd,
                                         struct file_lock *fl);
-extern int      lockd_up(void);
-extern void     lockd_down(void);
+extern int      lockd_up(struct net *net);
+extern void     lockd_down(struct net *net);
 
 #endif /* LINUX_LOCKD_BIND_H */
diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index f85308e688fd..e33f747b173c 100644
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -103,6 +103,7 @@ struct svc_export {
         struct nfsd4_fs_locations ex_fslocs;
         int                     ex_nflavors;
         struct exp_flavor_info  ex_flavors[MAX_SECINFO_LIST];
+        struct cache_detail     *cd;
 };
 
 /* an "export key" (expkey) maps a filehandlefragement to an
@@ -129,24 +130,22 @@ __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
 /*
  * Function declarations
  */
-int                     nfsd_export_init(void);
-void                    nfsd_export_shutdown(void);
-void                    nfsd_export_flush(void);
+int                     nfsd_export_init(struct net *);
+void                    nfsd_export_shutdown(struct net *);
+void                    nfsd_export_flush(struct net *);
 struct svc_export *     rqst_exp_get_by_name(struct svc_rqst *,
                                              struct path *);
 struct svc_export *     rqst_exp_parent(struct svc_rqst *,
                                         struct path *);
 struct svc_export *     rqst_find_fsidzero_export(struct svc_rqst *);
-int                     exp_rootfh(struct auth_domain *, 
+int                     exp_rootfh(struct net *, struct auth_domain *,
                                         char *path, struct knfsd_fh *, int maxsize);
 __be32                  exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
 __be32                  nfserrno(int errno);
 
-extern struct cache_detail svc_export_cache;
-
 static inline void exp_put(struct svc_export *exp)
 {
-        cache_put(&exp->h, &svc_export_cache);
+        cache_put(&exp->h, exp->cd);
 }
 
 static inline void exp_get(struct svc_export *exp)
diff --git a/include/linux/sunrpc/svcauth.h b/include/linux/sunrpc/svcauth.h
index 548790e9113b..2c54683b91de 100644
--- a/include/linux/sunrpc/svcauth.h
+++ b/include/linux/sunrpc/svcauth.h
@@ -16,7 +16,6 @@
 #include <linux/sunrpc/cache.h>
 #include <linux/hash.h>
 
-#define SVC_CRED_NGROUPS        32
 struct svc_cred {
         uid_t                   cr_uid;
         gid_t                   cr_gid;
@@ -131,7 +130,7 @@ extern struct auth_domain *auth_domain_lookup(char *name, struct auth_domain *ne
 extern struct auth_domain *auth_domain_find(char *name);
 extern struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr);
 extern int auth_unix_forget_old(struct auth_domain *dom);
-extern void svcauth_unix_purge(void);
+extern void svcauth_unix_purge(struct net *net);
 extern void svcauth_unix_info_release(struct svc_xprt *xpt);
 extern int svcauth_unix_set_client(struct svc_rqst *rqstp);
 
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 28b62dbb6d1e..3089de37c433 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -969,16 +969,17 @@ svcauth_gss_set_client(struct svc_rqst *rqstp)
 }
 
 static inline int
-gss_write_init_verf(struct cache_detail *cd, struct svc_rqst *rqstp, struct rsi *rsip)
+gss_write_init_verf(struct cache_detail *cd, struct svc_rqst *rqstp,
+                struct xdr_netobj *out_handle, int *major_status)
 {
         struct rsc *rsci;
         int        rc;
 
-        if (rsip->major_status != GSS_S_COMPLETE)
+        if (*major_status != GSS_S_COMPLETE)
                 return gss_write_null_verf(rqstp);
-        rsci = gss_svc_searchbyctx(cd, &rsip->out_handle);
+        rsci = gss_svc_searchbyctx(cd, out_handle);
         if (rsci == NULL) {
-                rsip->major_status = GSS_S_NO_CONTEXT;
+                *major_status = GSS_S_NO_CONTEXT;
                 return gss_write_null_verf(rqstp);
         }
         rc = gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN);
@@ -986,22 +987,13 @@ gss_write_init_verf(struct cache_detail *cd, struct svc_rqst *rqstp, struct rsi
         return rc;
 }
 
-/*
- * Having read the cred already and found we're in the context
- * initiation case, read the verifier and initiate (or check the results
- * of) upcalls to userspace for help with context initiation.  If
- * the upcall results are available, write the verifier and result.
- * Otherwise, drop the request pending an answer to the upcall.
- */
-static int svcauth_gss_handle_init(struct svc_rqst *rqstp,
-                        struct rpc_gss_wire_cred *gc, __be32 *authp)
+static inline int
+gss_read_verf(struct rpc_gss_wire_cred *gc,
+              struct kvec *argv, __be32 *authp,
+              struct xdr_netobj *in_handle,
+              struct xdr_netobj *in_token)
 {
-        struct kvec *argv = &rqstp->rq_arg.head[0];
-        struct kvec *resv = &rqstp->rq_res.head[0];
         struct xdr_netobj tmpobj;
-        struct rsi *rsip, rsikey;
-        int ret;
-        struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id);
 
         /* Read the verifier; should be NULL: */
         *authp = rpc_autherr_badverf;
@@ -1011,24 +1003,67 @@ static int svcauth_gss_handle_init(struct svc_rqst *rqstp,
                 return SVC_DENIED;
         if (svc_getnl(argv) != 0)
                 return SVC_DENIED;
-
         /* Martial context handle and token for upcall: */
         *authp = rpc_autherr_badcred;
         if (gc->gc_proc == RPC_GSS_PROC_INIT && gc->gc_ctx.len != 0)
                 return SVC_DENIED;
-        memset(&rsikey, 0, sizeof(rsikey));
-        if (dup_netobj(&rsikey.in_handle, &gc->gc_ctx))
+        if (dup_netobj(in_handle, &gc->gc_ctx))
                 return SVC_CLOSE;
         *authp = rpc_autherr_badverf;
         if (svc_safe_getnetobj(argv, &tmpobj)) {
-                kfree(rsikey.in_handle.data);
+                kfree(in_handle->data);
                 return SVC_DENIED;
         }
-        if (dup_netobj(&rsikey.in_token, &tmpobj)) {
-                kfree(rsikey.in_handle.data);
+        if (dup_netobj(in_token, &tmpobj)) {
+                kfree(in_handle->data);
                 return SVC_CLOSE;
         }
 
+        return 0;
+}
+
+static inline int
+gss_write_resv(struct kvec *resv, size_t size_limit,
+               struct xdr_netobj *out_handle, struct xdr_netobj *out_token,
+               int major_status, int minor_status)
+{
+        if (resv->iov_len + 4 > size_limit)
+                return -1;
+        svc_putnl(resv, RPC_SUCCESS);
+        if (svc_safe_putnetobj(resv, out_handle))
+                return -1;
+        if (resv->iov_len + 3 * 4 > size_limit)
+                return -1;
+        svc_putnl(resv, major_status);
+        svc_putnl(resv, minor_status);
+        svc_putnl(resv, GSS_SEQ_WIN);
+        if (svc_safe_putnetobj(resv, out_token))
+                return -1;
+        return 0;
+}
+
+/*
+ * Having read the cred already and found we're in the context
+ * initiation case, read the verifier and initiate (or check the results
+ * of) upcalls to userspace for help with context initiation.  If
+ * the upcall results are available, write the verifier and result.
+ * Otherwise, drop the request pending an answer to the upcall.
+ */
+static int svcauth_gss_handle_init(struct svc_rqst *rqstp,
+                        struct rpc_gss_wire_cred *gc, __be32 *authp)
+{
+        struct kvec *argv = &rqstp->rq_arg.head[0];
+        struct kvec *resv = &rqstp->rq_res.head[0];
+        struct rsi *rsip, rsikey;
+        int ret;
+        struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id);
+
+        memset(&rsikey, 0, sizeof(rsikey));
+        ret = gss_read_verf(gc, argv, authp,
+                            &rsikey.in_handle, &rsikey.in_token);
+        if (ret)
+                return ret;
+
         /* Perform upcall, or find upcall result: */
         rsip = rsi_lookup(sn->rsi_cache, &rsikey);
         rsi_free(&rsikey);
@@ -1040,19 +1075,12 @@ static int svcauth_gss_handle_init(struct svc_rqst *rqstp,
 
         ret = SVC_CLOSE;
         /* Got an answer to the upcall; use it: */
-        if (gss_write_init_verf(sn->rsc_cache, rqstp, rsip))
+        if (gss_write_init_verf(sn->rsc_cache, rqstp,
+                                &rsip->out_handle, &rsip->major_status))
                 goto out;
-        if (resv->iov_len + 4 > PAGE_SIZE)
-                goto out;
-        svc_putnl(resv, RPC_SUCCESS);
-        if (svc_safe_putnetobj(resv, &rsip->out_handle))
-                goto out;
-        if (resv->iov_len + 3 * 4 > PAGE_SIZE)
-                goto out;
-        svc_putnl(resv, rsip->major_status);
-        svc_putnl(resv, rsip->minor_status);
-        svc_putnl(resv, GSS_SEQ_WIN);
-        if (svc_safe_putnetobj(resv, &rsip->out_token))
+        if (gss_write_resv(resv, PAGE_SIZE,
+                           &rsip->out_handle, &rsip->out_token,
+                           rsip->major_status, rsip->minor_status))
                 goto out;
 
         ret = SVC_COMPLETE;
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 71ec8530ec8c..6138c925923d 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -347,17 +347,12 @@ static inline int ip_map_update(struct net *net, struct ip_map *ipm,
         return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry);
 }
 
-
-void svcauth_unix_purge(void)
+void svcauth_unix_purge(struct net *net)
 {
-        struct net *net;
-
-        for_each_net(net) {
-                struct sunrpc_net *sn;
+        struct sunrpc_net *sn;
 
-                sn = net_generic(net, sunrpc_net_id);
-                cache_purge(sn->ip_map_cache);
-        }
+        sn = net_generic(net, sunrpc_net_id);
+        cache_purge(sn->ip_map_cache);
 }
 EXPORT_SYMBOL_GPL(svcauth_unix_purge);