#include <linux/module.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/hash.h>
#include <linux/sunrpc/clnt.h>
#include <linux/spinlock.h>
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
-static struct rpc_authops * auth_flavors[RPC_AUTH_MAXFLAVOR] = {
+static DEFINE_SPINLOCK(rpc_authflavor_lock);
+static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = {
&authnull_ops, /* AUTH_NULL */
&authunix_ops, /* AUTH_UNIX */
NULL, /* others can be loadable modules */
};
+static LIST_HEAD(cred_unused);
+static unsigned long number_cred_unused;
+
static u32
pseudoflavor_to_flavor(u32 flavor) {
if (flavor >= RPC_AUTH_MAXFLAVOR)
}
int
-rpcauth_register(struct rpc_authops *ops)
+rpcauth_register(const struct rpc_authops *ops)
{
rpc_authflavor_t flavor;
+ int ret = -EPERM;
if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
return -EINVAL;
- if (auth_flavors[flavor] != NULL)
- return -EPERM; /* what else? */
- auth_flavors[flavor] = ops;
- return 0;
+ spin_lock(&rpc_authflavor_lock);
+ if (auth_flavors[flavor] == NULL) {
+ auth_flavors[flavor] = ops;
+ ret = 0;
+ }
+ spin_unlock(&rpc_authflavor_lock);
+ return ret;
}
+EXPORT_SYMBOL_GPL(rpcauth_register);
int
-rpcauth_unregister(struct rpc_authops *ops)
+rpcauth_unregister(const struct rpc_authops *ops)
{
rpc_authflavor_t flavor;
+ int ret = -EPERM;
if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
return -EINVAL;
- if (auth_flavors[flavor] != ops)
- return -EPERM; /* what else? */
- auth_flavors[flavor] = NULL;
- return 0;
+ spin_lock(&rpc_authflavor_lock);
+ if (auth_flavors[flavor] == ops) {
+ auth_flavors[flavor] = NULL;
+ ret = 0;
+ }
+ spin_unlock(&rpc_authflavor_lock);
+ return ret;
}
+EXPORT_SYMBOL_GPL(rpcauth_unregister);
struct rpc_auth *
rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
{
struct rpc_auth *auth;
- struct rpc_authops *ops;
+ const struct rpc_authops *ops;
u32 flavor = pseudoflavor_to_flavor(pseudoflavor);
auth = ERR_PTR(-EINVAL);
if (flavor >= RPC_AUTH_MAXFLAVOR)
goto out;
- /* FIXME - auth_flavors[] really needs an rw lock,
- * and module refcounting. */
-#ifdef CONFIG_KMOD
if ((ops = auth_flavors[flavor]) == NULL)
request_module("rpc-auth-%u", flavor);
-#endif
- if ((ops = auth_flavors[flavor]) == NULL)
+ spin_lock(&rpc_authflavor_lock);
+ ops = auth_flavors[flavor];
+ if (ops == NULL || !try_module_get(ops->owner)) {
+ spin_unlock(&rpc_authflavor_lock);
goto out;
+ }
+ spin_unlock(&rpc_authflavor_lock);
auth = ops->create(clnt, pseudoflavor);
+ module_put(ops->owner);
if (IS_ERR(auth))
return auth;
if (clnt->cl_auth)
- rpcauth_destroy(clnt->cl_auth);
+ rpcauth_release(clnt->cl_auth);
clnt->cl_auth = auth;
out:
return auth;
}
+EXPORT_SYMBOL_GPL(rpcauth_create);
void
-rpcauth_destroy(struct rpc_auth *auth)
+rpcauth_release(struct rpc_auth *auth)
{
if (!atomic_dec_and_test(&auth->au_count))
return;
static DEFINE_SPINLOCK(rpc_credcache_lock);
+static void
+rpcauth_unhash_cred_locked(struct rpc_cred *cred)
+{
+ hlist_del_rcu(&cred->cr_hash);
+ smp_mb__before_clear_bit();
+ clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags);
+}
+
+static int
+rpcauth_unhash_cred(struct rpc_cred *cred)
+{
+ spinlock_t *cache_lock;
+ int ret;
+
+ cache_lock = &cred->cr_auth->au_credcache->lock;
+ spin_lock(cache_lock);
+ ret = atomic_read(&cred->cr_count) == 0;
+ if (ret)
+ rpcauth_unhash_cred_locked(cred);
+ spin_unlock(cache_lock);
+ return ret;
+}
+
/*
* Initialize RPC credential cache
*/
int
-rpcauth_init_credcache(struct rpc_auth *auth, unsigned long expire)
+rpcauth_init_credcache(struct rpc_auth *auth)
{
struct rpc_cred_cache *new;
int i;
return -ENOMEM;
for (i = 0; i < RPC_CREDCACHE_NR; i++)
INIT_HLIST_HEAD(&new->hashtable[i]);
- new->expire = expire;
- new->nextgc = jiffies + (expire >> 1);
+ spin_lock_init(&new->lock);
auth->au_credcache = new;
return 0;
}
+EXPORT_SYMBOL_GPL(rpcauth_init_credcache);
/*
* Destroy a list of credentials
*/
static inline
-void rpcauth_destroy_credlist(struct hlist_head *head)
+void rpcauth_destroy_credlist(struct list_head *head)
{
struct rpc_cred *cred;
- while (!hlist_empty(head)) {
- cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
- hlist_del_init(&cred->cr_hash);
+ while (!list_empty(head)) {
+ cred = list_entry(head->next, struct rpc_cred, cr_lru);
+ list_del_init(&cred->cr_lru);
put_rpccred(cred);
}
}
* that are not referenced.
*/
void
-rpcauth_free_credcache(struct rpc_auth *auth)
+rpcauth_clear_credcache(struct rpc_cred_cache *cache)
{
- struct rpc_cred_cache *cache = auth->au_credcache;
- HLIST_HEAD(free);
- struct hlist_node *pos, *next;
+ LIST_HEAD(free);
+ struct hlist_head *head;
struct rpc_cred *cred;
int i;
spin_lock(&rpc_credcache_lock);
+ spin_lock(&cache->lock);
for (i = 0; i < RPC_CREDCACHE_NR; i++) {
- hlist_for_each_safe(pos, next, &cache->hashtable[i]) {
- cred = hlist_entry(pos, struct rpc_cred, cr_hash);
- __hlist_del(&cred->cr_hash);
- hlist_add_head(&cred->cr_hash, &free);
+ head = &cache->hashtable[i];
+ while (!hlist_empty(head)) {
+ cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
+ get_rpccred(cred);
+ if (!list_empty(&cred->cr_lru)) {
+ list_del(&cred->cr_lru);
+ number_cred_unused--;
+ }
+ list_add_tail(&cred->cr_lru, &free);
+ rpcauth_unhash_cred_locked(cred);
}
}
+ spin_unlock(&cache->lock);
spin_unlock(&rpc_credcache_lock);
rpcauth_destroy_credlist(&free);
}
-static void
-rpcauth_prune_expired(struct rpc_auth *auth, struct rpc_cred *cred, struct hlist_head *free)
+/*
+ * Destroy the RPC credential cache
+ */
+void
+rpcauth_destroy_credcache(struct rpc_auth *auth)
{
- if (atomic_read(&cred->cr_count) != 1)
- return;
- if (time_after(jiffies, cred->cr_expire + auth->au_credcache->expire))
- cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
- if (!(cred->cr_flags & RPCAUTH_CRED_UPTODATE)) {
- __hlist_del(&cred->cr_hash);
- hlist_add_head(&cred->cr_hash, free);
+ struct rpc_cred_cache *cache = auth->au_credcache;
+
+ if (cache) {
+ auth->au_credcache = NULL;
+ rpcauth_clear_credcache(cache);
+ kfree(cache);
}
}
+EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache);
+
+
+#define RPC_AUTH_EXPIRY_MORATORIUM (60 * HZ)
/*
* Remove stale credentials. Avoid sleeping inside the loop.
*/
-static void
-rpcauth_gc_credcache(struct rpc_auth *auth, struct hlist_head *free)
+static int
+rpcauth_prune_expired(struct list_head *free, int nr_to_scan)
{
- struct rpc_cred_cache *cache = auth->au_credcache;
- struct hlist_node *pos, *next;
- struct rpc_cred *cred;
- int i;
-
- dprintk("RPC: gc'ing RPC credentials for auth %p\n", auth);
- for (i = 0; i < RPC_CREDCACHE_NR; i++) {
- hlist_for_each_safe(pos, next, &cache->hashtable[i]) {
- cred = hlist_entry(pos, struct rpc_cred, cr_hash);
- rpcauth_prune_expired(auth, cred, free);
+ spinlock_t *cache_lock;
+ struct rpc_cred *cred, *next;
+ unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM;
+
+ list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) {
+
+ /* Enforce a 60 second garbage collection moratorium */
+ if (time_in_range_open(cred->cr_expire, expired, jiffies) &&
+ test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0)
+ continue;
+
+ list_del_init(&cred->cr_lru);
+ number_cred_unused--;
+ if (atomic_read(&cred->cr_count) != 0)
+ continue;
+
+ cache_lock = &cred->cr_auth->au_credcache->lock;
+ spin_lock(cache_lock);
+ if (atomic_read(&cred->cr_count) == 0) {
+ get_rpccred(cred);
+ list_add_tail(&cred->cr_lru, free);
+ rpcauth_unhash_cred_locked(cred);
+ nr_to_scan--;
}
+ spin_unlock(cache_lock);
+ if (nr_to_scan == 0)
+ break;
}
- cache->nextgc = jiffies + cache->expire;
+ return nr_to_scan;
+}
+
+/*
+ * Run memory cache shrinker.
+ */
+static int
+rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
+{
+ LIST_HEAD(free);
+ int res;
+
+ if (list_empty(&cred_unused))
+ return 0;
+ spin_lock(&rpc_credcache_lock);
+ nr_to_scan = rpcauth_prune_expired(&free, nr_to_scan);
+ res = (number_cred_unused / 100) * sysctl_vfs_cache_pressure;
+ spin_unlock(&rpc_credcache_lock);
+ rpcauth_destroy_credlist(&free);
+ return res;
}
/*
rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
int flags)
{
+ LIST_HEAD(free);
struct rpc_cred_cache *cache = auth->au_credcache;
- HLIST_HEAD(free);
- struct hlist_node *pos, *next;
- struct rpc_cred *new = NULL,
- *cred = NULL;
- int nr = 0;
-
- if (!(flags & RPCAUTH_LOOKUP_ROOTCREDS))
- nr = acred->uid & RPC_CREDCACHE_MASK;
-retry:
- spin_lock(&rpc_credcache_lock);
- if (time_before(cache->nextgc, jiffies))
- rpcauth_gc_credcache(auth, &free);
- hlist_for_each_safe(pos, next, &cache->hashtable[nr]) {
- struct rpc_cred *entry;
- entry = hlist_entry(pos, struct rpc_cred, cr_hash);
- if (entry->cr_ops->crmatch(acred, entry, flags)) {
- hlist_del(&entry->cr_hash);
- cred = entry;
- break;
+ struct hlist_node *pos;
+ struct rpc_cred *cred = NULL,
+ *entry, *new;
+ unsigned int nr;
+
+ nr = hash_long(acred->uid, RPC_CREDCACHE_HASHBITS);
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) {
+ if (!entry->cr_ops->crmatch(acred, entry, flags))
+ continue;
+ spin_lock(&cache->lock);
+ if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) {
+ spin_unlock(&cache->lock);
+ continue;
}
- rpcauth_prune_expired(auth, entry, &free);
- }
- if (new) {
- if (cred)
- hlist_add_head(&new->cr_hash, &free);
- else
- cred = new;
- }
- if (cred) {
- hlist_add_head(&cred->cr_hash, &cache->hashtable[nr]);
- get_rpccred(cred);
+ cred = get_rpccred(entry);
+ spin_unlock(&cache->lock);
+ break;
}
- spin_unlock(&rpc_credcache_lock);
+ rcu_read_unlock();
- rpcauth_destroy_credlist(&free);
+ if (cred != NULL)
+ goto found;
- if (!cred) {
- new = auth->au_ops->crcreate(auth, acred, flags);
- if (!IS_ERR(new)) {
-#ifdef RPC_DEBUG
- new->cr_magic = RPCAUTH_CRED_MAGIC;
-#endif
- goto retry;
- } else
- cred = new;
- } else if ((cred->cr_flags & RPCAUTH_CRED_NEW)
- && cred->cr_ops->cr_init != NULL
- && !(flags & RPCAUTH_LOOKUP_NEW)) {
+ new = auth->au_ops->crcreate(auth, acred, flags);
+ if (IS_ERR(new)) {
+ cred = new;
+ goto out;
+ }
+
+ spin_lock(&cache->lock);
+ hlist_for_each_entry(entry, pos, &cache->hashtable[nr], cr_hash) {
+ if (!entry->cr_ops->crmatch(acred, entry, flags))
+ continue;
+ cred = get_rpccred(entry);
+ break;
+ }
+ if (cred == NULL) {
+ cred = new;
+ set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags);
+ hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]);
+ } else
+ list_add_tail(&new->cr_lru, &free);
+ spin_unlock(&cache->lock);
+found:
+ if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
+ cred->cr_ops->cr_init != NULL &&
+ !(flags & RPCAUTH_LOOKUP_NEW)) {
int res = cred->cr_ops->cr_init(auth, cred);
if (res < 0) {
put_rpccred(cred);
cred = ERR_PTR(res);
}
}
-
- return (struct rpc_cred *) cred;
+ rpcauth_destroy_credlist(&free);
+out:
+ return cred;
}
+EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache);
struct rpc_cred *
rpcauth_lookupcred(struct rpc_auth *auth, int flags)
{
- struct auth_cred acred = {
- .uid = current->fsuid,
- .gid = current->fsgid,
- .group_info = current->group_info,
- };
+ struct auth_cred acred;
struct rpc_cred *ret;
+ const struct cred *cred = current_cred();
- dprintk("RPC: looking up %s cred\n",
+ dprintk("RPC: looking up %s cred\n",
auth->au_ops->au_name);
- get_group_info(acred.group_info);
+
+ memset(&acred, 0, sizeof(acred));
+ acred.uid = cred->fsuid;
+ acred.gid = cred->fsgid;
+ acred.group_info = get_group_info(((struct cred *)cred)->group_info);
+
ret = auth->au_ops->lookup_cred(auth, &acred, flags);
put_group_info(acred.group_info);
return ret;
}
-struct rpc_cred *
-rpcauth_bindcred(struct rpc_task *task)
+void
+rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred,
+ struct rpc_auth *auth, const struct rpc_credops *ops)
+{
+ INIT_HLIST_NODE(&cred->cr_hash);
+ INIT_LIST_HEAD(&cred->cr_lru);
+ atomic_set(&cred->cr_count, 1);
+ cred->cr_auth = auth;
+ cred->cr_ops = ops;
+ cred->cr_expire = jiffies;
+#ifdef RPC_DEBUG
+ cred->cr_magic = RPCAUTH_CRED_MAGIC;
+#endif
+ cred->cr_uid = acred->uid;
+}
+EXPORT_SYMBOL_GPL(rpcauth_init_cred);
+
+void
+rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags)
{
- struct rpc_auth *auth = task->tk_auth;
+ task->tk_msg.rpc_cred = get_rpccred(cred);
+ dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid,
+ cred->cr_auth->au_ops->au_name, cred);
+}
+EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred);
+
+static void
+rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags)
+{
+ struct rpc_auth *auth = task->tk_client->cl_auth;
struct auth_cred acred = {
- .uid = current->fsuid,
- .gid = current->fsgid,
- .group_info = current->group_info,
+ .uid = 0,
+ .gid = 0,
};
struct rpc_cred *ret;
- int flags = 0;
- dprintk("RPC: %4d looking up %s cred\n",
- task->tk_pid, task->tk_auth->au_ops->au_name);
- get_group_info(acred.group_info);
- if (task->tk_flags & RPC_TASK_ROOTCREDS)
- flags |= RPCAUTH_LOOKUP_ROOTCREDS;
- ret = auth->au_ops->lookup_cred(auth, &acred, flags);
+ dprintk("RPC: %5u looking up %s cred\n",
+ task->tk_pid, task->tk_client->cl_auth->au_ops->au_name);
+ ret = auth->au_ops->lookup_cred(auth, &acred, lookupflags);
+ if (!IS_ERR(ret))
+ task->tk_msg.rpc_cred = ret;
+ else
+ task->tk_status = PTR_ERR(ret);
+}
+
+static void
+rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags)
+{
+ struct rpc_auth *auth = task->tk_client->cl_auth;
+ struct rpc_cred *ret;
+
+ dprintk("RPC: %5u looking up %s cred\n",
+ task->tk_pid, auth->au_ops->au_name);
+ ret = rpcauth_lookupcred(auth, lookupflags);
if (!IS_ERR(ret))
task->tk_msg.rpc_cred = ret;
else
task->tk_status = PTR_ERR(ret);
- put_group_info(acred.group_info);
- return ret;
}
void
-rpcauth_holdcred(struct rpc_task *task)
+rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags)
{
- dprintk("RPC: %4d holding %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
- if (task->tk_msg.rpc_cred)
- get_rpccred(task->tk_msg.rpc_cred);
+ int lookupflags = 0;
+
+ if (flags & RPC_TASK_ASYNC)
+ lookupflags |= RPCAUTH_LOOKUP_NEW;
+ if (cred != NULL)
+ cred->cr_ops->crbind(task, cred, lookupflags);
+ else if (flags & RPC_TASK_ROOTCREDS)
+ rpcauth_bind_root_cred(task, lookupflags);
+ else
+ rpcauth_bind_new_cred(task, lookupflags);
}
void
put_rpccred(struct rpc_cred *cred)
{
- cred->cr_expire = jiffies;
- if (!atomic_dec_and_test(&cred->cr_count))
+ /* Fast path for unhashed credentials */
+ if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) == 0) {
+ if (atomic_dec_and_test(&cred->cr_count))
+ cred->cr_ops->crdestroy(cred);
+ return;
+ }
+
+ if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock))
return;
+ if (!list_empty(&cred->cr_lru)) {
+ number_cred_unused--;
+ list_del_init(&cred->cr_lru);
+ }
+ if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) {
+ if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) {
+ cred->cr_expire = jiffies;
+ list_add_tail(&cred->cr_lru, &cred_unused);
+ number_cred_unused++;
+ goto out_nodestroy;
+ }
+ if (!rpcauth_unhash_cred(cred)) {
+ /* We were hashed and someone looked us up... */
+ goto out_nodestroy;
+ }
+ }
+ spin_unlock(&rpc_credcache_lock);
cred->cr_ops->crdestroy(cred);
+ return;
+out_nodestroy:
+ spin_unlock(&rpc_credcache_lock);
}
+EXPORT_SYMBOL_GPL(put_rpccred);
void
rpcauth_unbindcred(struct rpc_task *task)
{
struct rpc_cred *cred = task->tk_msg.rpc_cred;
- dprintk("RPC: %4d releasing %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+ dprintk("RPC: %5u releasing %s cred %p\n",
+ task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
put_rpccred(cred);
task->tk_msg.rpc_cred = NULL;
}
-u32 *
-rpcauth_marshcred(struct rpc_task *task, u32 *p)
+__be32 *
+rpcauth_marshcred(struct rpc_task *task, __be32 *p)
{
struct rpc_cred *cred = task->tk_msg.rpc_cred;
- dprintk("RPC: %4d marshaling %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+ dprintk("RPC: %5u marshaling %s cred %p\n",
+ task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
return cred->cr_ops->crmarshal(task, p);
}
-u32 *
-rpcauth_checkverf(struct rpc_task *task, u32 *p)
+__be32 *
+rpcauth_checkverf(struct rpc_task *task, __be32 *p)
{
struct rpc_cred *cred = task->tk_msg.rpc_cred;
- dprintk("RPC: %4d validating %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+ dprintk("RPC: %5u validating %s cred %p\n",
+ task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
return cred->cr_ops->crvalidate(task, p);
}
int
rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp,
- u32 *data, void *obj)
+ __be32 *data, void *obj)
{
struct rpc_cred *cred = task->tk_msg.rpc_cred;
- dprintk("RPC: %4d using %s cred %p to wrap rpc data\n",
+ dprintk("RPC: %5u using %s cred %p to wrap rpc data\n",
task->tk_pid, cred->cr_ops->cr_name, cred);
if (cred->cr_ops->crwrap_req)
return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj);
int
rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
- u32 *data, void *obj)
+ __be32 *data, void *obj)
{
struct rpc_cred *cred = task->tk_msg.rpc_cred;
- dprintk("RPC: %4d using %s cred %p to unwrap rpc data\n",
+ dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n",
task->tk_pid, cred->cr_ops->cr_name, cred);
if (cred->cr_ops->crunwrap_resp)
return cred->cr_ops->crunwrap_resp(task, decode, rqstp,
struct rpc_cred *cred = task->tk_msg.rpc_cred;
int err;
- dprintk("RPC: %4d refreshing %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+ dprintk("RPC: %5u refreshing %s cred %p\n",
+ task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
err = cred->cr_ops->crrefresh(task);
if (err < 0)
void
rpcauth_invalcred(struct rpc_task *task)
{
- dprintk("RPC: %4d invalidating %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
- spin_lock(&rpc_credcache_lock);
- if (task->tk_msg.rpc_cred)
- task->tk_msg.rpc_cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
- spin_unlock(&rpc_credcache_lock);
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+
+ dprintk("RPC: %5u invalidating %s cred %p\n",
+ task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
+ if (cred)
+ clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
}
int
rpcauth_uptodatecred(struct rpc_task *task)
{
- return !(task->tk_msg.rpc_cred) ||
- (task->tk_msg.rpc_cred->cr_flags & RPCAUTH_CRED_UPTODATE);
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+
+ return cred == NULL ||
+ test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
+}
+
+static struct shrinker rpc_cred_shrinker = {
+ .shrink = rpcauth_cache_shrinker,
+ .seeks = DEFAULT_SEEKS,
+};
+
+void __init rpcauth_init_module(void)
+{
+ rpc_init_authunix();
+ rpc_init_generic_auth();
+ register_shrinker(&rpc_cred_shrinker);
+}
+
+void __exit rpcauth_remove_module(void)
+{
+ unregister_shrinker(&rpc_cred_shrinker);
}
Code Review / linux-2.6.git / blobdiff