Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/sunrpc/svcauth.c b/net/sunrpc/svcauth.c
new file mode 100644
index 0000000..bde8147
--- /dev/null
+++ b/net/sunrpc/svcauth.c
@@ -0,0 +1,216 @@
+/*
+ * linux/net/sunrpc/svcauth.c
+ *
+ * The generic interface for RPC authentication on the server side.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ *
+ * CHANGES
+ * 19-Apr-2000 Chris Evans - Security fix
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/sunrpc/types.h>
+#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/svcsock.h>
+#include <linux/sunrpc/svcauth.h>
+#include <linux/err.h>
+#include <linux/hash.h>
+
+#define RPCDBG_FACILITY RPCDBG_AUTH
+
+
+/*
+ * Table of authenticators
+ */
+extern struct auth_ops svcauth_null;
+extern struct auth_ops svcauth_unix;
+
+static DEFINE_SPINLOCK(authtab_lock);
+static struct auth_ops *authtab[RPC_AUTH_MAXFLAVOR] = {
+ [0] = &svcauth_null,
+ [1] = &svcauth_unix,
+};
+
+int
+svc_authenticate(struct svc_rqst *rqstp, u32 *authp)
+{
+ rpc_authflavor_t flavor;
+ struct auth_ops *aops;
+
+ *authp = rpc_auth_ok;
+
+ flavor = ntohl(svc_getu32(&rqstp->rq_arg.head[0]));
+
+ dprintk("svc: svc_authenticate (%d)\n", flavor);
+
+ spin_lock(&authtab_lock);
+ if (flavor >= RPC_AUTH_MAXFLAVOR || !(aops = authtab[flavor])
+ || !try_module_get(aops->owner)) {
+ spin_unlock(&authtab_lock);
+ *authp = rpc_autherr_badcred;
+ return SVC_DENIED;
+ }
+ spin_unlock(&authtab_lock);
+
+ rqstp->rq_authop = aops;
+ return aops->accept(rqstp, authp);
+}
+
+int svc_set_client(struct svc_rqst *rqstp)
+{
+ return rqstp->rq_authop->set_client(rqstp);
+}
+
+/* A request, which was authenticated, has now executed.
+ * Time to finalise the the credentials and verifier
+ * and release and resources
+ */
+int svc_authorise(struct svc_rqst *rqstp)
+{
+ struct auth_ops *aops = rqstp->rq_authop;
+ int rv = 0;
+
+ rqstp->rq_authop = NULL;
+
+ if (aops) {
+ rv = aops->release(rqstp);
+ module_put(aops->owner);
+ }
+ return rv;
+}
+
+int
+svc_auth_register(rpc_authflavor_t flavor, struct auth_ops *aops)
+{
+ int rv = -EINVAL;
+ spin_lock(&authtab_lock);
+ if (flavor < RPC_AUTH_MAXFLAVOR && authtab[flavor] == NULL) {
+ authtab[flavor] = aops;
+ rv = 0;
+ }
+ spin_unlock(&authtab_lock);
+ return rv;
+}
+
+void
+svc_auth_unregister(rpc_authflavor_t flavor)
+{
+ spin_lock(&authtab_lock);
+ if (flavor < RPC_AUTH_MAXFLAVOR)
+ authtab[flavor] = NULL;
+ spin_unlock(&authtab_lock);
+}
+EXPORT_SYMBOL(svc_auth_unregister);
+
+/**************************************************
+ * cache for domain name to auth_domain
+ * Entries are only added by flavours which will normally
+ * have a structure that 'inherits' from auth_domain.
+ * e.g. when an IP -> domainname is given to auth_unix,
+ * and the domain name doesn't exist, it will create a
+ * auth_unix_domain and add it to this hash table.
+ * If it finds the name does exist, but isn't AUTH_UNIX,
+ * it will complain.
+ */
+
+/*
+ * Auth auth_domain cache is somewhat different to other caches,
+ * largely because the entries are possibly of different types:
+ * each auth flavour has it's own type.
+ * One consequence of this that DefineCacheLookup cannot
+ * allocate a new structure as it cannot know the size.
+ * Notice that the "INIT" code fragment is quite different
+ * from other caches. When auth_domain_lookup might be
+ * creating a new domain, the new domain is passed in
+ * complete and it is used as-is rather than being copied into
+ * another structure.
+ */
+#define DN_HASHBITS 6
+#define DN_HASHMAX (1<<DN_HASHBITS)
+#define DN_HASHMASK (DN_HASHMAX-1)
+
+static struct cache_head *auth_domain_table[DN_HASHMAX];
+
+static void auth_domain_drop(struct cache_head *item, struct cache_detail *cd)
+{
+ struct auth_domain *dom = container_of(item, struct auth_domain, h);
+ if (cache_put(item,cd))
+ authtab[dom->flavour]->domain_release(dom);
+}
+
+
+struct cache_detail auth_domain_cache = {
+ .hash_size = DN_HASHMAX,
+ .hash_table = auth_domain_table,
+ .name = "auth.domain",
+ .cache_put = auth_domain_drop,
+};
+
+void auth_domain_put(struct auth_domain *dom)
+{
+ auth_domain_drop(&dom->h, &auth_domain_cache);
+}
+
+static inline int auth_domain_hash(struct auth_domain *item)
+{
+ return hash_str(item->name, DN_HASHBITS);
+}
+static inline int auth_domain_match(struct auth_domain *tmp, struct auth_domain *item)
+{
+ return strcmp(tmp->name, item->name) == 0;
+}
+
+struct auth_domain *
+auth_domain_lookup(struct auth_domain *item, int set)
+{
+ struct auth_domain *tmp = NULL;
+ struct cache_head **hp, **head;
+ head = &auth_domain_cache.hash_table[auth_domain_hash(item)];
+
+ if (set)
+ write_lock(&auth_domain_cache.hash_lock);
+ else
+ read_lock(&auth_domain_cache.hash_lock);
+ for (hp=head; *hp != NULL; hp = &tmp->h.next) {
+ tmp = container_of(*hp, struct auth_domain, h);
+ if (!auth_domain_match(tmp, item))
+ continue;
+ if (!set) {
+ cache_get(&tmp->h);
+ goto out_noset;
+ }
+ *hp = tmp->h.next;
+ tmp->h.next = NULL;
+ auth_domain_drop(&tmp->h, &auth_domain_cache);
+ goto out_set;
+ }
+ /* Didn't find anything */
+ if (!set)
+ goto out_nada;
+ auth_domain_cache.entries++;
+out_set:
+ item->h.next = *head;
+ *head = &item->h;
+ cache_get(&item->h);
+ write_unlock(&auth_domain_cache.hash_lock);
+ cache_fresh(&auth_domain_cache, &item->h, item->h.expiry_time);
+ cache_get(&item->h);
+ return item;
+out_nada:
+ tmp = NULL;
+out_noset:
+ read_unlock(&auth_domain_cache.hash_lock);
+ return tmp;
+}
+
+struct auth_domain *auth_domain_find(char *name)
+{
+ struct auth_domain *rv, ad;
+
+ ad.name = name;
+ rv = auth_domain_lookup(&ad, 0);
+ return rv;
+}