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-rw-r--r--net/sunrpc/auth.c157
1 files changed, 109 insertions, 48 deletions
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 8dc47f1..880d0de 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -19,6 +19,15 @@
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
+#define RPC_CREDCACHE_DEFAULT_HASHBITS (4)
+struct rpc_cred_cache {
+ struct hlist_head *hashtable;
+ unsigned int hashbits;
+ spinlock_t lock;
+};
+
+static unsigned int auth_hashbits = RPC_CREDCACHE_DEFAULT_HASHBITS;
+
static DEFINE_SPINLOCK(rpc_authflavor_lock);
static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = {
&authnull_ops, /* AUTH_NULL */
@@ -29,6 +38,42 @@ static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = {
static LIST_HEAD(cred_unused);
static unsigned long number_cred_unused;
+#define MAX_HASHTABLE_BITS (10)
+static int param_set_hashtbl_sz(const char *val, struct kernel_param *kp)
+{
+ unsigned long num;
+ unsigned int nbits;
+ int ret;
+
+ if (!val)
+ goto out_inval;
+ ret = strict_strtoul(val, 0, &num);
+ if (ret == -EINVAL)
+ goto out_inval;
+ nbits = fls(num);
+ if (num > (1U << nbits))
+ nbits++;
+ if (nbits > MAX_HASHTABLE_BITS || nbits < 2)
+ goto out_inval;
+ *(unsigned int *)kp->arg = nbits;
+ return 0;
+out_inval:
+ return -EINVAL;
+}
+
+static int param_get_hashtbl_sz(char *buffer, struct kernel_param *kp)
+{
+ unsigned int nbits;
+
+ nbits = *(unsigned int *)kp->arg;
+ return sprintf(buffer, "%u", 1U << nbits);
+}
+
+#define param_check_hashtbl_sz(name, p) __param_check(name, p, unsigned int);
+
+module_param_named(auth_hashtable_size, auth_hashbits, hashtbl_sz, 0644);
+MODULE_PARM_DESC(auth_hashtable_size, "RPC credential cache hashtable size");
+
static u32
pseudoflavor_to_flavor(u32 flavor) {
if (flavor >= RPC_AUTH_MAXFLAVOR)
@@ -145,16 +190,23 @@ int
rpcauth_init_credcache(struct rpc_auth *auth)
{
struct rpc_cred_cache *new;
- int i;
+ unsigned int hashsize;
new = kmalloc(sizeof(*new), GFP_KERNEL);
if (!new)
- return -ENOMEM;
- for (i = 0; i < RPC_CREDCACHE_NR; i++)
- INIT_HLIST_HEAD(&new->hashtable[i]);
+ goto out_nocache;
+ new->hashbits = auth_hashbits;
+ hashsize = 1U << new->hashbits;
+ new->hashtable = kcalloc(hashsize, sizeof(new->hashtable[0]), GFP_KERNEL);
+ if (!new->hashtable)
+ goto out_nohashtbl;
spin_lock_init(&new->lock);
auth->au_credcache = new;
return 0;
+out_nohashtbl:
+ kfree(new);
+out_nocache:
+ return -ENOMEM;
}
EXPORT_SYMBOL_GPL(rpcauth_init_credcache);
@@ -183,11 +235,12 @@ rpcauth_clear_credcache(struct rpc_cred_cache *cache)
LIST_HEAD(free);
struct hlist_head *head;
struct rpc_cred *cred;
+ unsigned int hashsize = 1U << cache->hashbits;
int i;
spin_lock(&rpc_credcache_lock);
spin_lock(&cache->lock);
- for (i = 0; i < RPC_CREDCACHE_NR; i++) {
+ for (i = 0; i < hashsize; i++) {
head = &cache->hashtable[i];
while (!hlist_empty(head)) {
cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
@@ -216,6 +269,7 @@ rpcauth_destroy_credcache(struct rpc_auth *auth)
if (cache) {
auth->au_credcache = NULL;
rpcauth_clear_credcache(cache);
+ kfree(cache->hashtable);
kfree(cache);
}
}
@@ -297,7 +351,7 @@ rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
*entry, *new;
unsigned int nr;
- nr = hash_long(acred->uid, RPC_CREDCACHE_HASHBITS);
+ nr = hash_long(acred->uid, cache->hashbits);
rcu_read_lock();
hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) {
@@ -390,16 +444,16 @@ rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred,
}
EXPORT_SYMBOL_GPL(rpcauth_init_cred);
-void
+struct rpc_cred *
rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags)
{
- 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);
+ return get_rpccred(cred);
}
EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred);
-static void
+static struct rpc_cred *
rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags)
{
struct rpc_auth *auth = task->tk_client->cl_auth;
@@ -407,45 +461,43 @@ rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags)
.uid = 0,
.gid = 0,
};
- struct rpc_cred *ret;
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);
+ return auth->au_ops->lookup_cred(auth, &acred, lookupflags);
}
-static void
+static struct rpc_cred *
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);
+ return rpcauth_lookupcred(auth, lookupflags);
}
-void
+static int
rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags)
{
+ struct rpc_rqst *req = task->tk_rqstp;
+ struct rpc_cred *new;
int lookupflags = 0;
if (flags & RPC_TASK_ASYNC)
lookupflags |= RPCAUTH_LOOKUP_NEW;
if (cred != NULL)
- cred->cr_ops->crbind(task, cred, lookupflags);
+ new = cred->cr_ops->crbind(task, cred, lookupflags);
else if (flags & RPC_TASK_ROOTCREDS)
- rpcauth_bind_root_cred(task, lookupflags);
+ new = rpcauth_bind_root_cred(task, lookupflags);
else
- rpcauth_bind_new_cred(task, lookupflags);
+ new = rpcauth_bind_new_cred(task, lookupflags);
+ if (IS_ERR(new))
+ return PTR_ERR(new);
+ if (req->rq_cred != NULL)
+ put_rpccred(req->rq_cred);
+ req->rq_cred = new;
+ return 0;
}
void
@@ -484,22 +536,10 @@ out_nodestroy:
}
EXPORT_SYMBOL_GPL(put_rpccred);
-void
-rpcauth_unbindcred(struct rpc_task *task)
-{
- struct rpc_cred *cred = task->tk_msg.rpc_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;
-}
-
__be32 *
rpcauth_marshcred(struct rpc_task *task, __be32 *p)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
dprintk("RPC: %5u marshaling %s cred %p\n",
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
@@ -510,7 +550,7 @@ rpcauth_marshcred(struct rpc_task *task, __be32 *p)
__be32 *
rpcauth_checkverf(struct rpc_task *task, __be32 *p)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
dprintk("RPC: %5u validating %s cred %p\n",
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
@@ -522,7 +562,7 @@ int
rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp,
__be32 *data, void *obj)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
dprintk("RPC: %5u using %s cred %p to wrap rpc data\n",
task->tk_pid, cred->cr_ops->cr_name, cred);
@@ -536,7 +576,7 @@ int
rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
__be32 *data, void *obj)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n",
task->tk_pid, cred->cr_ops->cr_name, cred);
@@ -550,13 +590,21 @@ rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
int
rpcauth_refreshcred(struct rpc_task *task)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
int err;
+ cred = task->tk_rqstp->rq_cred;
+ if (cred == NULL) {
+ err = rpcauth_bindcred(task, task->tk_msg.rpc_cred, task->tk_flags);
+ if (err < 0)
+ goto out;
+ cred = task->tk_rqstp->rq_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);
+out:
if (err < 0)
task->tk_status = err;
return err;
@@ -565,7 +613,7 @@ rpcauth_refreshcred(struct rpc_task *task)
void
rpcauth_invalcred(struct rpc_task *task)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
dprintk("RPC: %5u invalidating %s cred %p\n",
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
@@ -576,7 +624,7 @@ rpcauth_invalcred(struct rpc_task *task)
int
rpcauth_uptodatecred(struct rpc_task *task)
{
- struct rpc_cred *cred = task->tk_msg.rpc_cred;
+ struct rpc_cred *cred = task->tk_rqstp->rq_cred;
return cred == NULL ||
test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
@@ -587,14 +635,27 @@ static struct shrinker rpc_cred_shrinker = {
.seeks = DEFAULT_SEEKS,
};
-void __init rpcauth_init_module(void)
+int __init rpcauth_init_module(void)
{
- rpc_init_authunix();
- rpc_init_generic_auth();
+ int err;
+
+ err = rpc_init_authunix();
+ if (err < 0)
+ goto out1;
+ err = rpc_init_generic_auth();
+ if (err < 0)
+ goto out2;
register_shrinker(&rpc_cred_shrinker);
+ return 0;
+out2:
+ rpc_destroy_authunix();
+out1:
+ return err;
}
void __exit rpcauth_remove_module(void)
{
+ rpc_destroy_authunix();
+ rpc_destroy_generic_auth();
unregister_shrinker(&rpc_cred_shrinker);
}
generated by cgit v1.1 at 2024-12-26 10:23:26 +0000