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https://github.com/edk2-porting/linux-next.git
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78c542f916
In addition to the benefits of using an enum rather than a set of macros, we now have a named type that can improve static type checking of function return values. As part of this change, I removed a stale comment from svcauth.h; the return values from current implementations of the auth_ops::release method are all zero/negative errno, not the SVC_OK enum values as the old comment suggested. Suggested-by: NeilBrown <neilb@suse.de> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
1062 lines
25 KiB
C
1062 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <linux/sunrpc/types.h>
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#include <linux/sunrpc/xdr.h>
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#include <linux/sunrpc/svcsock.h>
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#include <linux/sunrpc/svcauth.h>
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#include <linux/sunrpc/gss_api.h>
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#include <linux/sunrpc/addr.h>
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#include <linux/err.h>
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#include <linux/seq_file.h>
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#include <linux/hash.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/ipv6.h>
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#include <linux/kernel.h>
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#include <linux/user_namespace.h>
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#include <trace/events/sunrpc.h>
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#define RPCDBG_FACILITY RPCDBG_AUTH
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#include "netns.h"
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/*
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* AUTHUNIX and AUTHNULL credentials are both handled here.
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* AUTHNULL is treated just like AUTHUNIX except that the uid/gid
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* are always nobody (-2). i.e. we do the same IP address checks for
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* AUTHNULL as for AUTHUNIX, and that is done here.
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*/
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struct unix_domain {
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struct auth_domain h;
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/* other stuff later */
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};
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extern struct auth_ops svcauth_null;
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extern struct auth_ops svcauth_unix;
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extern struct auth_ops svcauth_tls;
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static void svcauth_unix_domain_release_rcu(struct rcu_head *head)
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{
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struct auth_domain *dom = container_of(head, struct auth_domain, rcu_head);
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struct unix_domain *ud = container_of(dom, struct unix_domain, h);
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kfree(dom->name);
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kfree(ud);
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}
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static void svcauth_unix_domain_release(struct auth_domain *dom)
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{
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call_rcu(&dom->rcu_head, svcauth_unix_domain_release_rcu);
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}
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struct auth_domain *unix_domain_find(char *name)
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{
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struct auth_domain *rv;
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struct unix_domain *new = NULL;
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rv = auth_domain_find(name);
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while(1) {
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if (rv) {
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if (new && rv != &new->h)
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svcauth_unix_domain_release(&new->h);
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if (rv->flavour != &svcauth_unix) {
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auth_domain_put(rv);
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return NULL;
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}
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return rv;
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}
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new = kmalloc(sizeof(*new), GFP_KERNEL);
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if (new == NULL)
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return NULL;
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kref_init(&new->h.ref);
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new->h.name = kstrdup(name, GFP_KERNEL);
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if (new->h.name == NULL) {
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kfree(new);
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return NULL;
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}
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new->h.flavour = &svcauth_unix;
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rv = auth_domain_lookup(name, &new->h);
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}
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}
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EXPORT_SYMBOL_GPL(unix_domain_find);
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/**************************************************
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* cache for IP address to unix_domain
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* as needed by AUTH_UNIX
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*/
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#define IP_HASHBITS 8
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#define IP_HASHMAX (1<<IP_HASHBITS)
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struct ip_map {
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struct cache_head h;
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char m_class[8]; /* e.g. "nfsd" */
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struct in6_addr m_addr;
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struct unix_domain *m_client;
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struct rcu_head m_rcu;
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};
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static void ip_map_put(struct kref *kref)
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{
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struct cache_head *item = container_of(kref, struct cache_head, ref);
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struct ip_map *im = container_of(item, struct ip_map,h);
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if (test_bit(CACHE_VALID, &item->flags) &&
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!test_bit(CACHE_NEGATIVE, &item->flags))
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auth_domain_put(&im->m_client->h);
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kfree_rcu(im, m_rcu);
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}
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static inline int hash_ip6(const struct in6_addr *ip)
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{
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return hash_32(ipv6_addr_hash(ip), IP_HASHBITS);
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}
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static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
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{
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struct ip_map *orig = container_of(corig, struct ip_map, h);
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struct ip_map *new = container_of(cnew, struct ip_map, h);
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return strcmp(orig->m_class, new->m_class) == 0 &&
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ipv6_addr_equal(&orig->m_addr, &new->m_addr);
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}
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static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
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{
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struct ip_map *new = container_of(cnew, struct ip_map, h);
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struct ip_map *item = container_of(citem, struct ip_map, h);
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strcpy(new->m_class, item->m_class);
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new->m_addr = item->m_addr;
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}
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static void update(struct cache_head *cnew, struct cache_head *citem)
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{
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struct ip_map *new = container_of(cnew, struct ip_map, h);
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struct ip_map *item = container_of(citem, struct ip_map, h);
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kref_get(&item->m_client->h.ref);
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new->m_client = item->m_client;
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}
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static struct cache_head *ip_map_alloc(void)
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{
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struct ip_map *i = kmalloc(sizeof(*i), GFP_KERNEL);
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if (i)
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return &i->h;
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else
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return NULL;
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}
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static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
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{
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return sunrpc_cache_pipe_upcall(cd, h);
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}
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static void ip_map_request(struct cache_detail *cd,
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struct cache_head *h,
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char **bpp, int *blen)
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{
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char text_addr[40];
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struct ip_map *im = container_of(h, struct ip_map, h);
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if (ipv6_addr_v4mapped(&(im->m_addr))) {
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snprintf(text_addr, 20, "%pI4", &im->m_addr.s6_addr32[3]);
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} else {
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snprintf(text_addr, 40, "%pI6", &im->m_addr);
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}
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qword_add(bpp, blen, im->m_class);
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qword_add(bpp, blen, text_addr);
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(*bpp)[-1] = '\n';
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}
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static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
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static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time64_t expiry);
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static int ip_map_parse(struct cache_detail *cd,
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char *mesg, int mlen)
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{
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/* class ipaddress [domainname] */
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/* should be safe just to use the start of the input buffer
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* for scratch: */
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char *buf = mesg;
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int len;
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char class[8];
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union {
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struct sockaddr sa;
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struct sockaddr_in s4;
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struct sockaddr_in6 s6;
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} address;
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struct sockaddr_in6 sin6;
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int err;
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struct ip_map *ipmp;
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struct auth_domain *dom;
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time64_t expiry;
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if (mesg[mlen-1] != '\n')
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return -EINVAL;
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mesg[mlen-1] = 0;
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/* class */
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len = qword_get(&mesg, class, sizeof(class));
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if (len <= 0) return -EINVAL;
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/* ip address */
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len = qword_get(&mesg, buf, mlen);
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if (len <= 0) return -EINVAL;
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if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
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return -EINVAL;
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switch (address.sa.sa_family) {
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case AF_INET:
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/* Form a mapped IPv4 address in sin6 */
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sin6.sin6_family = AF_INET6;
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ipv6_addr_set_v4mapped(address.s4.sin_addr.s_addr,
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&sin6.sin6_addr);
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case AF_INET6:
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memcpy(&sin6, &address.s6, sizeof(sin6));
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break;
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#endif
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default:
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return -EINVAL;
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}
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err = get_expiry(&mesg, &expiry);
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if (err)
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return err;
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/* domainname, or empty for NEGATIVE */
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len = qword_get(&mesg, buf, mlen);
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if (len < 0) return -EINVAL;
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if (len) {
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dom = unix_domain_find(buf);
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if (dom == NULL)
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return -ENOENT;
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} else
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dom = NULL;
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/* IPv6 scope IDs are ignored for now */
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ipmp = __ip_map_lookup(cd, class, &sin6.sin6_addr);
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if (ipmp) {
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err = __ip_map_update(cd, ipmp,
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container_of(dom, struct unix_domain, h),
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expiry);
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} else
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err = -ENOMEM;
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if (dom)
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auth_domain_put(dom);
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cache_flush();
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return err;
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}
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static int ip_map_show(struct seq_file *m,
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struct cache_detail *cd,
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struct cache_head *h)
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{
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struct ip_map *im;
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struct in6_addr addr;
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char *dom = "-no-domain-";
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if (h == NULL) {
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seq_puts(m, "#class IP domain\n");
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return 0;
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}
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im = container_of(h, struct ip_map, h);
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/* class addr domain */
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addr = im->m_addr;
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if (test_bit(CACHE_VALID, &h->flags) &&
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!test_bit(CACHE_NEGATIVE, &h->flags))
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dom = im->m_client->h.name;
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if (ipv6_addr_v4mapped(&addr)) {
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seq_printf(m, "%s %pI4 %s\n",
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im->m_class, &addr.s6_addr32[3], dom);
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} else {
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seq_printf(m, "%s %pI6 %s\n", im->m_class, &addr, dom);
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}
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return 0;
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}
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static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
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struct in6_addr *addr)
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{
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struct ip_map ip;
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struct cache_head *ch;
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strcpy(ip.m_class, class);
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ip.m_addr = *addr;
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ch = sunrpc_cache_lookup_rcu(cd, &ip.h,
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hash_str(class, IP_HASHBITS) ^
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hash_ip6(addr));
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if (ch)
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return container_of(ch, struct ip_map, h);
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else
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return NULL;
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}
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static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
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struct unix_domain *udom, time64_t expiry)
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{
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struct ip_map ip;
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struct cache_head *ch;
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ip.m_client = udom;
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ip.h.flags = 0;
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if (!udom)
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set_bit(CACHE_NEGATIVE, &ip.h.flags);
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ip.h.expiry_time = expiry;
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ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
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hash_str(ipm->m_class, IP_HASHBITS) ^
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hash_ip6(&ipm->m_addr));
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if (!ch)
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return -ENOMEM;
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cache_put(ch, cd);
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return 0;
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}
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void svcauth_unix_purge(struct net *net)
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{
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struct sunrpc_net *sn;
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sn = net_generic(net, sunrpc_net_id);
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cache_purge(sn->ip_map_cache);
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}
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EXPORT_SYMBOL_GPL(svcauth_unix_purge);
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static inline struct ip_map *
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ip_map_cached_get(struct svc_xprt *xprt)
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{
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struct ip_map *ipm = NULL;
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struct sunrpc_net *sn;
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if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
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spin_lock(&xprt->xpt_lock);
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ipm = xprt->xpt_auth_cache;
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if (ipm != NULL) {
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sn = net_generic(xprt->xpt_net, sunrpc_net_id);
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if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
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/*
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* The entry has been invalidated since it was
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* remembered, e.g. by a second mount from the
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* same IP address.
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*/
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xprt->xpt_auth_cache = NULL;
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spin_unlock(&xprt->xpt_lock);
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cache_put(&ipm->h, sn->ip_map_cache);
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return NULL;
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}
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cache_get(&ipm->h);
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}
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spin_unlock(&xprt->xpt_lock);
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}
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return ipm;
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}
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static inline void
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ip_map_cached_put(struct svc_xprt *xprt, struct ip_map *ipm)
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{
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if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
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spin_lock(&xprt->xpt_lock);
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if (xprt->xpt_auth_cache == NULL) {
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/* newly cached, keep the reference */
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xprt->xpt_auth_cache = ipm;
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ipm = NULL;
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}
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spin_unlock(&xprt->xpt_lock);
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}
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if (ipm) {
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struct sunrpc_net *sn;
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sn = net_generic(xprt->xpt_net, sunrpc_net_id);
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cache_put(&ipm->h, sn->ip_map_cache);
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}
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}
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void
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svcauth_unix_info_release(struct svc_xprt *xpt)
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{
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struct ip_map *ipm;
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ipm = xpt->xpt_auth_cache;
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if (ipm != NULL) {
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struct sunrpc_net *sn;
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sn = net_generic(xpt->xpt_net, sunrpc_net_id);
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cache_put(&ipm->h, sn->ip_map_cache);
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}
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}
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/****************************************************************************
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* auth.unix.gid cache
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* simple cache to map a UID to a list of GIDs
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* because AUTH_UNIX aka AUTH_SYS has a max of UNX_NGROUPS
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*/
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#define GID_HASHBITS 8
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#define GID_HASHMAX (1<<GID_HASHBITS)
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struct unix_gid {
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struct cache_head h;
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kuid_t uid;
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struct group_info *gi;
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struct rcu_head rcu;
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};
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static int unix_gid_hash(kuid_t uid)
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{
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return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS);
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}
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static void unix_gid_free(struct rcu_head *rcu)
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{
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struct unix_gid *ug = container_of(rcu, struct unix_gid, rcu);
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struct cache_head *item = &ug->h;
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if (test_bit(CACHE_VALID, &item->flags) &&
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!test_bit(CACHE_NEGATIVE, &item->flags))
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put_group_info(ug->gi);
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kfree(ug);
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}
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static void unix_gid_put(struct kref *kref)
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{
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struct cache_head *item = container_of(kref, struct cache_head, ref);
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struct unix_gid *ug = container_of(item, struct unix_gid, h);
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call_rcu(&ug->rcu, unix_gid_free);
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}
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static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
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{
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struct unix_gid *orig = container_of(corig, struct unix_gid, h);
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struct unix_gid *new = container_of(cnew, struct unix_gid, h);
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return uid_eq(orig->uid, new->uid);
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}
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static void unix_gid_init(struct cache_head *cnew, struct cache_head *citem)
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{
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struct unix_gid *new = container_of(cnew, struct unix_gid, h);
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struct unix_gid *item = container_of(citem, struct unix_gid, h);
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new->uid = item->uid;
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}
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static void unix_gid_update(struct cache_head *cnew, struct cache_head *citem)
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{
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struct unix_gid *new = container_of(cnew, struct unix_gid, h);
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struct unix_gid *item = container_of(citem, struct unix_gid, h);
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get_group_info(item->gi);
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new->gi = item->gi;
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}
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static struct cache_head *unix_gid_alloc(void)
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{
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struct unix_gid *g = kmalloc(sizeof(*g), GFP_KERNEL);
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if (g)
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return &g->h;
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else
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return NULL;
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}
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static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
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{
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return sunrpc_cache_pipe_upcall_timeout(cd, h);
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}
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static void unix_gid_request(struct cache_detail *cd,
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struct cache_head *h,
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char **bpp, int *blen)
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{
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char tuid[20];
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struct unix_gid *ug = container_of(h, struct unix_gid, h);
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snprintf(tuid, 20, "%u", from_kuid(&init_user_ns, ug->uid));
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qword_add(bpp, blen, tuid);
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(*bpp)[-1] = '\n';
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}
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static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid);
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static int unix_gid_parse(struct cache_detail *cd,
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char *mesg, int mlen)
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{
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/* uid expiry Ngid gid0 gid1 ... gidN-1 */
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int id;
|
|
kuid_t uid;
|
|
int gids;
|
|
int rv;
|
|
int i;
|
|
int err;
|
|
time64_t expiry;
|
|
struct unix_gid ug, *ugp;
|
|
|
|
if (mesg[mlen - 1] != '\n')
|
|
return -EINVAL;
|
|
mesg[mlen-1] = 0;
|
|
|
|
rv = get_int(&mesg, &id);
|
|
if (rv)
|
|
return -EINVAL;
|
|
uid = make_kuid(current_user_ns(), id);
|
|
ug.uid = uid;
|
|
|
|
err = get_expiry(&mesg, &expiry);
|
|
if (err)
|
|
return err;
|
|
|
|
rv = get_int(&mesg, &gids);
|
|
if (rv || gids < 0 || gids > 8192)
|
|
return -EINVAL;
|
|
|
|
ug.gi = groups_alloc(gids);
|
|
if (!ug.gi)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0 ; i < gids ; i++) {
|
|
int gid;
|
|
kgid_t kgid;
|
|
rv = get_int(&mesg, &gid);
|
|
err = -EINVAL;
|
|
if (rv)
|
|
goto out;
|
|
kgid = make_kgid(current_user_ns(), gid);
|
|
if (!gid_valid(kgid))
|
|
goto out;
|
|
ug.gi->gid[i] = kgid;
|
|
}
|
|
|
|
groups_sort(ug.gi);
|
|
ugp = unix_gid_lookup(cd, uid);
|
|
if (ugp) {
|
|
struct cache_head *ch;
|
|
ug.h.flags = 0;
|
|
ug.h.expiry_time = expiry;
|
|
ch = sunrpc_cache_update(cd,
|
|
&ug.h, &ugp->h,
|
|
unix_gid_hash(uid));
|
|
if (!ch)
|
|
err = -ENOMEM;
|
|
else {
|
|
err = 0;
|
|
cache_put(ch, cd);
|
|
}
|
|
} else
|
|
err = -ENOMEM;
|
|
out:
|
|
if (ug.gi)
|
|
put_group_info(ug.gi);
|
|
return err;
|
|
}
|
|
|
|
static int unix_gid_show(struct seq_file *m,
|
|
struct cache_detail *cd,
|
|
struct cache_head *h)
|
|
{
|
|
struct user_namespace *user_ns = m->file->f_cred->user_ns;
|
|
struct unix_gid *ug;
|
|
int i;
|
|
int glen;
|
|
|
|
if (h == NULL) {
|
|
seq_puts(m, "#uid cnt: gids...\n");
|
|
return 0;
|
|
}
|
|
ug = container_of(h, struct unix_gid, h);
|
|
if (test_bit(CACHE_VALID, &h->flags) &&
|
|
!test_bit(CACHE_NEGATIVE, &h->flags))
|
|
glen = ug->gi->ngroups;
|
|
else
|
|
glen = 0;
|
|
|
|
seq_printf(m, "%u %d:", from_kuid_munged(user_ns, ug->uid), glen);
|
|
for (i = 0; i < glen; i++)
|
|
seq_printf(m, " %d", from_kgid_munged(user_ns, ug->gi->gid[i]));
|
|
seq_printf(m, "\n");
|
|
return 0;
|
|
}
|
|
|
|
static const struct cache_detail unix_gid_cache_template = {
|
|
.owner = THIS_MODULE,
|
|
.hash_size = GID_HASHMAX,
|
|
.name = "auth.unix.gid",
|
|
.cache_put = unix_gid_put,
|
|
.cache_upcall = unix_gid_upcall,
|
|
.cache_request = unix_gid_request,
|
|
.cache_parse = unix_gid_parse,
|
|
.cache_show = unix_gid_show,
|
|
.match = unix_gid_match,
|
|
.init = unix_gid_init,
|
|
.update = unix_gid_update,
|
|
.alloc = unix_gid_alloc,
|
|
};
|
|
|
|
int unix_gid_cache_create(struct net *net)
|
|
{
|
|
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
|
|
struct cache_detail *cd;
|
|
int err;
|
|
|
|
cd = cache_create_net(&unix_gid_cache_template, net);
|
|
if (IS_ERR(cd))
|
|
return PTR_ERR(cd);
|
|
err = cache_register_net(cd, net);
|
|
if (err) {
|
|
cache_destroy_net(cd, net);
|
|
return err;
|
|
}
|
|
sn->unix_gid_cache = cd;
|
|
return 0;
|
|
}
|
|
|
|
void unix_gid_cache_destroy(struct net *net)
|
|
{
|
|
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
|
|
struct cache_detail *cd = sn->unix_gid_cache;
|
|
|
|
sn->unix_gid_cache = NULL;
|
|
cache_purge(cd);
|
|
cache_unregister_net(cd, net);
|
|
cache_destroy_net(cd, net);
|
|
}
|
|
|
|
static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
|
|
{
|
|
struct unix_gid ug;
|
|
struct cache_head *ch;
|
|
|
|
ug.uid = uid;
|
|
ch = sunrpc_cache_lookup_rcu(cd, &ug.h, unix_gid_hash(uid));
|
|
if (ch)
|
|
return container_of(ch, struct unix_gid, h);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
static struct group_info *unix_gid_find(kuid_t uid, struct svc_rqst *rqstp)
|
|
{
|
|
struct unix_gid *ug;
|
|
struct group_info *gi;
|
|
int ret;
|
|
struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net,
|
|
sunrpc_net_id);
|
|
|
|
ug = unix_gid_lookup(sn->unix_gid_cache, uid);
|
|
if (!ug)
|
|
return ERR_PTR(-EAGAIN);
|
|
ret = cache_check(sn->unix_gid_cache, &ug->h, &rqstp->rq_chandle);
|
|
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, sn->unix_gid_cache);
|
|
return gi;
|
|
default:
|
|
return ERR_PTR(-EAGAIN);
|
|
}
|
|
}
|
|
|
|
enum svc_auth_status
|
|
svcauth_unix_set_client(struct svc_rqst *rqstp)
|
|
{
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6, sin6_storage;
|
|
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:
|
|
sin = svc_addr_in(rqstp);
|
|
sin6 = &sin6_storage;
|
|
ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &sin6->sin6_addr);
|
|
break;
|
|
case AF_INET6:
|
|
sin6 = svc_addr_in6(rqstp);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
rqstp->rq_client = NULL;
|
|
if (rqstp->rq_proc == 0)
|
|
goto out;
|
|
|
|
rqstp->rq_auth_stat = rpc_autherr_badcred;
|
|
ipm = ip_map_cached_get(xprt);
|
|
if (ipm == NULL)
|
|
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(sn->ip_map_cache, &ipm->h, &rqstp->rq_chandle)) {
|
|
default:
|
|
BUG();
|
|
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(xprt, ipm);
|
|
break;
|
|
}
|
|
|
|
gi = unix_gid_find(cred->cr_uid, rqstp);
|
|
switch (PTR_ERR(gi)) {
|
|
case -EAGAIN:
|
|
return SVC_DROP;
|
|
case -ESHUTDOWN:
|
|
return SVC_CLOSE;
|
|
case -ENOENT:
|
|
break;
|
|
default:
|
|
put_group_info(cred->cr_group_info);
|
|
cred->cr_group_info = gi;
|
|
}
|
|
|
|
out:
|
|
rqstp->rq_auth_stat = rpc_auth_ok;
|
|
return SVC_OK;
|
|
}
|
|
EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
|
|
|
|
/**
|
|
* svcauth_null_accept - Decode and validate incoming RPC_AUTH_NULL credential
|
|
* @rqstp: RPC transaction
|
|
*
|
|
* Return values:
|
|
* %SVC_OK: Both credential and verifier are valid
|
|
* %SVC_DENIED: Credential or verifier is not valid
|
|
* %SVC_GARBAGE: Failed to decode credential or verifier
|
|
* %SVC_CLOSE: Temporary failure
|
|
*
|
|
* rqstp->rq_auth_stat is set as mandated by RFC 5531.
|
|
*/
|
|
static enum svc_auth_status
|
|
svcauth_null_accept(struct svc_rqst *rqstp)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct svc_cred *cred = &rqstp->rq_cred;
|
|
u32 flavor, len;
|
|
void *body;
|
|
|
|
/* Length of Call's credential body field: */
|
|
if (xdr_stream_decode_u32(xdr, &len) < 0)
|
|
return SVC_GARBAGE;
|
|
if (len != 0) {
|
|
rqstp->rq_auth_stat = rpc_autherr_badcred;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
/* Call's verf field: */
|
|
if (xdr_stream_decode_opaque_auth(xdr, &flavor, &body, &len) < 0)
|
|
return SVC_GARBAGE;
|
|
if (flavor != RPC_AUTH_NULL || len != 0) {
|
|
rqstp->rq_auth_stat = rpc_autherr_badverf;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
/* Signal that mapping to nobody uid/gid is required */
|
|
cred->cr_uid = INVALID_UID;
|
|
cred->cr_gid = INVALID_GID;
|
|
cred->cr_group_info = groups_alloc(0);
|
|
if (cred->cr_group_info == NULL)
|
|
return SVC_CLOSE; /* kmalloc failure - client must retry */
|
|
|
|
if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream,
|
|
RPC_AUTH_NULL, NULL, 0) < 0)
|
|
return SVC_CLOSE;
|
|
if (!svcxdr_set_accept_stat(rqstp))
|
|
return SVC_CLOSE;
|
|
|
|
rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
|
|
return SVC_OK;
|
|
}
|
|
|
|
static int
|
|
svcauth_null_release(struct svc_rqst *rqstp)
|
|
{
|
|
if (rqstp->rq_client)
|
|
auth_domain_put(rqstp->rq_client);
|
|
rqstp->rq_client = NULL;
|
|
if (rqstp->rq_cred.cr_group_info)
|
|
put_group_info(rqstp->rq_cred.cr_group_info);
|
|
rqstp->rq_cred.cr_group_info = NULL;
|
|
|
|
return 0; /* don't drop */
|
|
}
|
|
|
|
|
|
struct auth_ops svcauth_null = {
|
|
.name = "null",
|
|
.owner = THIS_MODULE,
|
|
.flavour = RPC_AUTH_NULL,
|
|
.accept = svcauth_null_accept,
|
|
.release = svcauth_null_release,
|
|
.set_client = svcauth_unix_set_client,
|
|
};
|
|
|
|
|
|
/**
|
|
* svcauth_tls_accept - Decode and validate incoming RPC_AUTH_TLS credential
|
|
* @rqstp: RPC transaction
|
|
*
|
|
* Return values:
|
|
* %SVC_OK: Both credential and verifier are valid
|
|
* %SVC_DENIED: Credential or verifier is not valid
|
|
* %SVC_GARBAGE: Failed to decode credential or verifier
|
|
* %SVC_CLOSE: Temporary failure
|
|
*
|
|
* rqstp->rq_auth_stat is set as mandated by RFC 5531.
|
|
*/
|
|
static enum svc_auth_status
|
|
svcauth_tls_accept(struct svc_rqst *rqstp)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct svc_cred *cred = &rqstp->rq_cred;
|
|
struct svc_xprt *xprt = rqstp->rq_xprt;
|
|
u32 flavor, len;
|
|
void *body;
|
|
__be32 *p;
|
|
|
|
/* Length of Call's credential body field: */
|
|
if (xdr_stream_decode_u32(xdr, &len) < 0)
|
|
return SVC_GARBAGE;
|
|
if (len != 0) {
|
|
rqstp->rq_auth_stat = rpc_autherr_badcred;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
/* Call's verf field: */
|
|
if (xdr_stream_decode_opaque_auth(xdr, &flavor, &body, &len) < 0)
|
|
return SVC_GARBAGE;
|
|
if (flavor != RPC_AUTH_NULL || len != 0) {
|
|
rqstp->rq_auth_stat = rpc_autherr_badverf;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
/* AUTH_TLS is not valid on non-NULL procedures */
|
|
if (rqstp->rq_proc != 0) {
|
|
rqstp->rq_auth_stat = rpc_autherr_badcred;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
/* Signal that mapping to nobody uid/gid is required */
|
|
cred->cr_uid = INVALID_UID;
|
|
cred->cr_gid = INVALID_GID;
|
|
cred->cr_group_info = groups_alloc(0);
|
|
if (cred->cr_group_info == NULL)
|
|
return SVC_CLOSE;
|
|
|
|
if (xprt->xpt_ops->xpo_handshake) {
|
|
p = xdr_reserve_space(&rqstp->rq_res_stream, XDR_UNIT * 2 + 8);
|
|
if (!p)
|
|
return SVC_CLOSE;
|
|
trace_svc_tls_start(xprt);
|
|
*p++ = rpc_auth_null;
|
|
*p++ = cpu_to_be32(8);
|
|
memcpy(p, "STARTTLS", 8);
|
|
|
|
set_bit(XPT_HANDSHAKE, &xprt->xpt_flags);
|
|
svc_xprt_enqueue(xprt);
|
|
} else {
|
|
trace_svc_tls_unavailable(xprt);
|
|
if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream,
|
|
RPC_AUTH_NULL, NULL, 0) < 0)
|
|
return SVC_CLOSE;
|
|
}
|
|
if (!svcxdr_set_accept_stat(rqstp))
|
|
return SVC_CLOSE;
|
|
|
|
rqstp->rq_cred.cr_flavor = RPC_AUTH_TLS;
|
|
return SVC_OK;
|
|
}
|
|
|
|
struct auth_ops svcauth_tls = {
|
|
.name = "tls",
|
|
.owner = THIS_MODULE,
|
|
.flavour = RPC_AUTH_TLS,
|
|
.accept = svcauth_tls_accept,
|
|
.release = svcauth_null_release,
|
|
.set_client = svcauth_unix_set_client,
|
|
};
|
|
|
|
|
|
/**
|
|
* svcauth_unix_accept - Decode and validate incoming RPC_AUTH_SYS credential
|
|
* @rqstp: RPC transaction
|
|
*
|
|
* Return values:
|
|
* %SVC_OK: Both credential and verifier are valid
|
|
* %SVC_DENIED: Credential or verifier is not valid
|
|
* %SVC_GARBAGE: Failed to decode credential or verifier
|
|
* %SVC_CLOSE: Temporary failure
|
|
*
|
|
* rqstp->rq_auth_stat is set as mandated by RFC 5531.
|
|
*/
|
|
static enum svc_auth_status
|
|
svcauth_unix_accept(struct svc_rqst *rqstp)
|
|
{
|
|
struct xdr_stream *xdr = &rqstp->rq_arg_stream;
|
|
struct svc_cred *cred = &rqstp->rq_cred;
|
|
struct user_namespace *userns;
|
|
u32 flavor, len, i;
|
|
void *body;
|
|
__be32 *p;
|
|
|
|
/*
|
|
* This implementation ignores the length of the Call's
|
|
* credential body field and the timestamp and machinename
|
|
* fields.
|
|
*/
|
|
p = xdr_inline_decode(xdr, XDR_UNIT * 3);
|
|
if (!p)
|
|
return SVC_GARBAGE;
|
|
len = be32_to_cpup(p + 2);
|
|
if (len > RPC_MAX_MACHINENAME)
|
|
return SVC_GARBAGE;
|
|
if (!xdr_inline_decode(xdr, len))
|
|
return SVC_GARBAGE;
|
|
|
|
/*
|
|
* Note: we skip uid_valid()/gid_valid() checks here for
|
|
* backwards compatibility with clients that use -1 id's.
|
|
* Instead, -1 uid or gid is later mapped to the
|
|
* (export-specific) anonymous id by nfsd_setuser.
|
|
* Supplementary gid's will be left alone.
|
|
*/
|
|
userns = (rqstp->rq_xprt && rqstp->rq_xprt->xpt_cred) ?
|
|
rqstp->rq_xprt->xpt_cred->user_ns : &init_user_ns;
|
|
if (xdr_stream_decode_u32(xdr, &i) < 0)
|
|
return SVC_GARBAGE;
|
|
cred->cr_uid = make_kuid(userns, i);
|
|
if (xdr_stream_decode_u32(xdr, &i) < 0)
|
|
return SVC_GARBAGE;
|
|
cred->cr_gid = make_kgid(userns, i);
|
|
|
|
if (xdr_stream_decode_u32(xdr, &len) < 0)
|
|
return SVC_GARBAGE;
|
|
if (len > UNX_NGROUPS)
|
|
goto badcred;
|
|
p = xdr_inline_decode(xdr, XDR_UNIT * len);
|
|
if (!p)
|
|
return SVC_GARBAGE;
|
|
cred->cr_group_info = groups_alloc(len);
|
|
if (cred->cr_group_info == NULL)
|
|
return SVC_CLOSE;
|
|
for (i = 0; i < len; i++) {
|
|
kgid_t kgid = make_kgid(userns, be32_to_cpup(p++));
|
|
cred->cr_group_info->gid[i] = kgid;
|
|
}
|
|
groups_sort(cred->cr_group_info);
|
|
|
|
/* Call's verf field: */
|
|
if (xdr_stream_decode_opaque_auth(xdr, &flavor, &body, &len) < 0)
|
|
return SVC_GARBAGE;
|
|
if (flavor != RPC_AUTH_NULL || len != 0) {
|
|
rqstp->rq_auth_stat = rpc_autherr_badverf;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream,
|
|
RPC_AUTH_NULL, NULL, 0) < 0)
|
|
return SVC_CLOSE;
|
|
if (!svcxdr_set_accept_stat(rqstp))
|
|
return SVC_CLOSE;
|
|
|
|
rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
|
|
return SVC_OK;
|
|
|
|
badcred:
|
|
rqstp->rq_auth_stat = rpc_autherr_badcred;
|
|
return SVC_DENIED;
|
|
}
|
|
|
|
static int
|
|
svcauth_unix_release(struct svc_rqst *rqstp)
|
|
{
|
|
/* Verifier (such as it is) is already in place.
|
|
*/
|
|
if (rqstp->rq_client)
|
|
auth_domain_put(rqstp->rq_client);
|
|
rqstp->rq_client = NULL;
|
|
if (rqstp->rq_cred.cr_group_info)
|
|
put_group_info(rqstp->rq_cred.cr_group_info);
|
|
rqstp->rq_cred.cr_group_info = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct auth_ops svcauth_unix = {
|
|
.name = "unix",
|
|
.owner = THIS_MODULE,
|
|
.flavour = RPC_AUTH_UNIX,
|
|
.accept = svcauth_unix_accept,
|
|
.release = svcauth_unix_release,
|
|
.domain_release = svcauth_unix_domain_release,
|
|
.set_client = svcauth_unix_set_client,
|
|
};
|
|
|
|
static const struct cache_detail ip_map_cache_template = {
|
|
.owner = THIS_MODULE,
|
|
.hash_size = IP_HASHMAX,
|
|
.name = "auth.unix.ip",
|
|
.cache_put = ip_map_put,
|
|
.cache_upcall = ip_map_upcall,
|
|
.cache_request = ip_map_request,
|
|
.cache_parse = ip_map_parse,
|
|
.cache_show = ip_map_show,
|
|
.match = ip_map_match,
|
|
.init = ip_map_init,
|
|
.update = update,
|
|
.alloc = ip_map_alloc,
|
|
};
|
|
|
|
int ip_map_cache_create(struct net *net)
|
|
{
|
|
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
|
|
struct cache_detail *cd;
|
|
int err;
|
|
|
|
cd = cache_create_net(&ip_map_cache_template, net);
|
|
if (IS_ERR(cd))
|
|
return PTR_ERR(cd);
|
|
err = cache_register_net(cd, net);
|
|
if (err) {
|
|
cache_destroy_net(cd, net);
|
|
return err;
|
|
}
|
|
sn->ip_map_cache = cd;
|
|
return 0;
|
|
}
|
|
|
|
void ip_map_cache_destroy(struct net *net)
|
|
{
|
|
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
|
|
struct cache_detail *cd = sn->ip_map_cache;
|
|
|
|
sn->ip_map_cache = NULL;
|
|
cache_purge(cd);
|
|
cache_unregister_net(cd, net);
|
|
cache_destroy_net(cd, net);
|
|
}
|