11da177e4SLinus Torvalds /* 2f30c2269SUwe Zeisberger * linux/net/sunrpc/auth_gss/auth_gss.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * RPCSEC_GSS client authentication. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 71da177e4SLinus Torvalds * All rights reserved. 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * Dug Song <dugsong@monkey.org> 101da177e4SLinus Torvalds * Andy Adamson <andros@umich.edu> 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 131da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 141da177e4SLinus Torvalds * are met: 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 171da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 181da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 191da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 201da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 211da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 221da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 231da177e4SLinus Torvalds * from this software without specific prior written permission. 241da177e4SLinus Torvalds * 251da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 261da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 271da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 281da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 301da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 311da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 321da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4SLinus Torvalds */ 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #include <linux/module.h> 401da177e4SLinus Torvalds #include <linux/init.h> 411da177e4SLinus Torvalds #include <linux/types.h> 421da177e4SLinus Torvalds #include <linux/slab.h> 431da177e4SLinus Torvalds #include <linux/sched.h> 442d2da60cSJ. Bruce Fields #include <linux/pagemap.h> 451da177e4SLinus Torvalds #include <linux/sunrpc/clnt.h> 461da177e4SLinus Torvalds #include <linux/sunrpc/auth.h> 471da177e4SLinus Torvalds #include <linux/sunrpc/auth_gss.h> 481da177e4SLinus Torvalds #include <linux/sunrpc/svcauth_gss.h> 491da177e4SLinus Torvalds #include <linux/sunrpc/gss_err.h> 501da177e4SLinus Torvalds #include <linux/workqueue.h> 511da177e4SLinus Torvalds #include <linux/sunrpc/rpc_pipe_fs.h> 521da177e4SLinus Torvalds #include <linux/sunrpc/gss_api.h> 531da177e4SLinus Torvalds #include <asm/uaccess.h> 54eb6dc19dSTrond Myklebust #include <linux/hashtable.h> 551da177e4SLinus Torvalds 56abfdbd53STrond Myklebust #include "../netns.h" 57abfdbd53STrond Myklebust 58f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 591da177e4SLinus Torvalds 60f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 610df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 621da177e4SLinus Torvalds 63126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 64126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 65126e216aSTrond Myklebust 664de6caa2SAndy Adamson #define GSS_KEY_EXPIRE_TIMEO 240 674de6caa2SAndy Adamson static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; 684de6caa2SAndy Adamson 69f895b252SJeff Layton #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) 701da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 711da177e4SLinus Torvalds #endif 721da177e4SLinus Torvalds 73725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 741da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 751da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 76adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 771da177e4SLinus Torvalds 7823c323afSTrond Myklebust static DEFINE_HASHTABLE(gss_auth_hash_table, 4); 79eb6dc19dSTrond Myklebust static DEFINE_SPINLOCK(gss_auth_hash_lock); 80eb6dc19dSTrond Myklebust 8119172284STrond Myklebust struct gss_pipe { 8219172284STrond Myklebust struct rpc_pipe_dir_object pdo; 8319172284STrond Myklebust struct rpc_pipe *pipe; 8419172284STrond Myklebust struct rpc_clnt *clnt; 8519172284STrond Myklebust const char *name; 86414a6295STrond Myklebust struct kref kref; 8719172284STrond Myklebust }; 8819172284STrond Myklebust 891da177e4SLinus Torvalds struct gss_auth { 900285ed1fSTrond Myklebust struct kref kref; 91eb6dc19dSTrond Myklebust struct hlist_node hash; 921da177e4SLinus Torvalds struct rpc_auth rpc_auth; 931da177e4SLinus Torvalds struct gss_api_mech *mech; 941da177e4SLinus Torvalds enum rpc_gss_svc service; 951da177e4SLinus Torvalds struct rpc_clnt *client; 96e726340aSTrond Myklebust struct net *net; 9734769fc4S\"J. Bruce Fields\ /* 9834769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 9934769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 10034769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 10134769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 10234769fc4S\"J. Bruce Fields\ */ 10319172284STrond Myklebust struct gss_pipe *gss_pipe[2]; 104bd4a3eb1STrond Myklebust const char *target_name; 1051da177e4SLinus Torvalds }; 1061da177e4SLinus Torvalds 10779a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 10879a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 10979a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 11079a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 1119eb2ddb4STrond Myklebust static void gss_put_auth(struct gss_auth *gss_auth); 112cf81939dS\"J. Bruce Fields\ 1135d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 114b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 115b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1181da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds atomic_inc(&ctx->count); 1211da177e4SLinus Torvalds return ctx; 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static inline void 1251da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1261da177e4SLinus Torvalds { 1271da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1285d28dc82STrond Myklebust gss_free_ctx(ctx); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1315d28dc82STrond Myklebust /* gss_cred_set_ctx: 1325d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1335d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1349beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1355d28dc82STrond Myklebust */ 1361da177e4SLinus Torvalds static void 1371da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1381da177e4SLinus Torvalds { 1391da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1405d28dc82STrond Myklebust 141cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 142cd019f75STrond Myklebust return; 1437b6962b0STrond Myklebust gss_get_ctx(ctx); 144cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 145fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1464e857c58SPeter Zijlstra smp_mb__before_atomic(); 147fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static const void * 1511da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1541da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1551da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1561da177e4SLinus Torvalds memcpy(res, p, len); 1571da177e4SLinus Torvalds return q; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static inline const void * 1611da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds const void *q; 1641da177e4SLinus Torvalds unsigned int len; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1671da177e4SLinus Torvalds if (IS_ERR(p)) 1681da177e4SLinus Torvalds return p; 1691da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1701da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1711da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1720f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1731da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1741da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1751da177e4SLinus Torvalds dest->len = len; 1761da177e4SLinus Torvalds return q; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static struct gss_cl_ctx * 1801da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1831da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1841da177e4SLinus Torvalds 1855d28dc82STrond Myklebust rcu_read_lock(); 186c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 187c5e6aecdSJeff Layton if (ctx) 188c5e6aecdSJeff Layton gss_get_ctx(ctx); 1895d28dc82STrond Myklebust rcu_read_unlock(); 1901da177e4SLinus Torvalds return ctx; 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds static struct gss_cl_ctx * 1941da177e4SLinus Torvalds gss_alloc_context(void) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1971da177e4SLinus Torvalds 1980f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1991da177e4SLinus Torvalds if (ctx != NULL) { 2001da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 2011da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 2021da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 2031da177e4SLinus Torvalds atomic_set(&ctx->count,1); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return ctx; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 2091da177e4SLinus Torvalds static const void * 2101da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds const void *q; 2131da177e4SLinus Torvalds unsigned int seclen; 2141da177e4SLinus Torvalds unsigned int timeout; 215620038f6SAndy Adamson unsigned long now = jiffies; 2161da177e4SLinus Torvalds u32 window_size; 2171da177e4SLinus Torvalds int ret; 2181da177e4SLinus Torvalds 219620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 220620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 221620038f6SAndy Adamson * the -t value passed to GSSD. 222620038f6SAndy Adamson */ 2231da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2241da177e4SLinus Torvalds if (IS_ERR(p)) 2251da177e4SLinus Torvalds goto err; 2261da177e4SLinus Torvalds if (timeout == 0) 2271da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 228620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 229620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 230620038f6SAndy Adamson * simultaneous requests 231620038f6SAndy Adamson */ 2321da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2331da177e4SLinus Torvalds if (IS_ERR(p)) 2341da177e4SLinus Torvalds goto err; 2351da177e4SLinus Torvalds ctx->gc_win = window_size; 2361da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2371da177e4SLinus Torvalds if (ctx->gc_win == 0) { 238dc5ddce9SJeff Layton /* 239dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 240dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 241dc5ddce9SJeff Layton */ 242dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 243dc5ddce9SJeff Layton if (!IS_ERR(p)) 244dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 245dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2461da177e4SLinus Torvalds goto err; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds /* copy the opaque wire context */ 2491da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2501da177e4SLinus Torvalds if (IS_ERR(p)) 2511da177e4SLinus Torvalds goto err; 2521da177e4SLinus Torvalds /* import the opaque security context */ 2531da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2541da177e4SLinus Torvalds if (IS_ERR(p)) 2551da177e4SLinus Torvalds goto err; 2561da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2571da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2581da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2591da177e4SLinus Torvalds goto err; 2601da177e4SLinus Torvalds } 261400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2621da177e4SLinus Torvalds if (ret < 0) { 2631da177e4SLinus Torvalds p = ERR_PTR(ret); 2641da177e4SLinus Torvalds goto err; 2651da177e4SLinus Torvalds } 2662004c726SJeff Layton 2672004c726SJeff Layton /* is there any trailing data? */ 2682004c726SJeff Layton if (q == end) { 2692004c726SJeff Layton p = q; 2702004c726SJeff Layton goto done; 2712004c726SJeff Layton } 2722004c726SJeff Layton 2732004c726SJeff Layton /* pull in acceptor name (if there is one) */ 2742004c726SJeff Layton p = simple_get_netobj(q, end, &ctx->gc_acceptor); 2752004c726SJeff Layton if (IS_ERR(p)) 2762004c726SJeff Layton goto err; 2772004c726SJeff Layton done: 2782004c726SJeff Layton dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u acceptor %.*s\n", 2792004c726SJeff Layton __func__, ctx->gc_expiry, now, timeout, ctx->gc_acceptor.len, 2802004c726SJeff Layton ctx->gc_acceptor.data); 2812004c726SJeff Layton return p; 2821da177e4SLinus Torvalds err: 283173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2841da177e4SLinus Torvalds return p; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 28734769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds struct gss_upcall_msg { 2901da177e4SLinus Torvalds atomic_t count; 2917eaf040bSEric W. Biederman kuid_t uid; 2921da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2931da177e4SLinus Torvalds struct list_head list; 2941da177e4SLinus Torvalds struct gss_auth *auth; 2959beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2961da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2971da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2981da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 29934769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 3001da177e4SLinus Torvalds }; 3011da177e4SLinus Torvalds 3022aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 30379a3f20bS\"J. Bruce Fields\ { 3042aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 30579a3f20bS\"J. Bruce Fields\ int ret; 30679a3f20bS\"J. Bruce Fields\ 30779a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 3082aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 3092aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 3102aed8b47STrond Myklebust ret = sn->pipe_version; 31179a3f20bS\"J. Bruce Fields\ } else 31279a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 31379a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 31479a3f20bS\"J. Bruce Fields\ return ret; 31579a3f20bS\"J. Bruce Fields\ } 31679a3f20bS\"J. Bruce Fields\ 3172aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 31879a3f20bS\"J. Bruce Fields\ { 3192aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 3202aed8b47STrond Myklebust 3212aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 3222aed8b47STrond Myklebust sn->pipe_version = -1; 32379a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 32479a3f20bS\"J. Bruce Fields\ } 32579a3f20bS\"J. Bruce Fields\ } 32679a3f20bS\"J. Bruce Fields\ 3271da177e4SLinus Torvalds static void 3281da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 3291da177e4SLinus Torvalds { 330e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3311da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 3321da177e4SLinus Torvalds return; 3332aed8b47STrond Myklebust put_pipe_version(net); 3341da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3351da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3361da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 337f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3389eb2ddb4STrond Myklebust gss_put_auth(gss_msg->auth); 3391da177e4SLinus Torvalds kfree(gss_msg); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds static struct gss_upcall_msg * 3437eaf040bSEric W. Biederman __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3441da177e4SLinus Torvalds { 3451da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3469beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3470b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3481da177e4SLinus Torvalds continue; 3491da177e4SLinus Torvalds atomic_inc(&pos->count); 350632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3511da177e4SLinus Torvalds return pos; 3521da177e4SLinus Torvalds } 353632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3541da177e4SLinus Torvalds return NULL; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds 357720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3581da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3591da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3601da177e4SLinus Torvalds */ 3611da177e4SLinus Torvalds static inline struct gss_upcall_msg * 362053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3631da177e4SLinus Torvalds { 3649beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3651da177e4SLinus Torvalds struct gss_upcall_msg *old; 3661da177e4SLinus Torvalds 3679beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3689beae467SStanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3691da177e4SLinus Torvalds if (old == NULL) { 3701da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3719beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3721da177e4SLinus Torvalds } else 3731da177e4SLinus Torvalds gss_msg = old; 3749beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3751da177e4SLinus Torvalds return gss_msg; 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds static void 3791da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3801da177e4SLinus Torvalds { 3811da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3821da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3831da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3841da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds static void 3881da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3891da177e4SLinus Torvalds { 3909beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3911da177e4SLinus Torvalds 3923b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3933b68aaeaSTrond Myklebust return; 3949beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3953b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3961da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3979beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds static void 401126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 402126e216aSTrond Myklebust { 403126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 404126e216aSTrond Myklebust case 0: 405126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 406126e216aSTrond Myklebust break; 407126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 408126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 409126e216aSTrond Myklebust break; 410126e216aSTrond Myklebust case -EKEYEXPIRED: 411126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 412126e216aSTrond Myklebust } 413126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 414126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 415126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 416126e216aSTrond Myklebust } 417126e216aSTrond Myklebust 418126e216aSTrond Myklebust static void 4191da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 4201da177e4SLinus Torvalds { 421a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 4221da177e4SLinus Torvalds struct gss_cred, gc_base); 4231da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 4249beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 4251da177e4SLinus Torvalds 4269beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 427126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 4289beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 429126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 4301da177e4SLinus Torvalds gss_release_msg(gss_msg); 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 43334769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 43434769fc4S\"J. Bruce Fields\ { 43590602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 43690602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 43790602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 43890602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 4399d3a2260STrond Myklebust 4409d3a2260STrond Myklebust BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); 44134769fc4S\"J. Bruce Fields\ } 44234769fc4S\"J. Bruce Fields\ 4439d3a2260STrond Myklebust static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 444bd4a3eb1STrond Myklebust const char *service_name, 445bd4a3eb1STrond Myklebust const char *target_name) 44634769fc4S\"J. Bruce Fields\ { 447683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4488b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4499d3a2260STrond Myklebust size_t buflen = sizeof(gss_msg->databuf); 4509d3a2260STrond Myklebust int len; 4518b1c7bf5SOlga Kornievskaia 4529d3a2260STrond Myklebust len = scnprintf(p, buflen, "mech=%s uid=%d ", mech->gm_name, 45390602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4549d3a2260STrond Myklebust buflen -= len; 4559d3a2260STrond Myklebust p += len; 4569d3a2260STrond Myklebust gss_msg->msg.len = len; 457bd4a3eb1STrond Myklebust if (target_name) { 4589d3a2260STrond Myklebust len = scnprintf(p, buflen, "target=%s ", target_name); 4599d3a2260STrond Myklebust buflen -= len; 4608b1c7bf5SOlga Kornievskaia p += len; 4618b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4628b1c7bf5SOlga Kornievskaia } 46368c97153STrond Myklebust if (service_name != NULL) { 4649d3a2260STrond Myklebust len = scnprintf(p, buflen, "service=%s ", service_name); 4659d3a2260STrond Myklebust buflen -= len; 4662efef708SOlga Kornievskaia p += len; 4672efef708SOlga Kornievskaia gss_msg->msg.len += len; 4682efef708SOlga Kornievskaia } 469683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 4709d3a2260STrond Myklebust len = scnprintf(p, buflen, "enctypes=%s ", 4719d3a2260STrond Myklebust mech->gm_upcall_enctypes); 4729d3a2260STrond Myklebust buflen -= len; 473683ac665STrond Myklebust p += len; 474683ac665STrond Myklebust gss_msg->msg.len += len; 475683ac665STrond Myklebust } 4769d3a2260STrond Myklebust len = scnprintf(p, buflen, "\n"); 4779d3a2260STrond Myklebust if (len == 0) 4789d3a2260STrond Myklebust goto out_overflow; 4798b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4808b1c7bf5SOlga Kornievskaia 48134769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 4829d3a2260STrond Myklebust return 0; 4839d3a2260STrond Myklebust out_overflow: 4849d3a2260STrond Myklebust WARN_ON_ONCE(1); 4859d3a2260STrond Myklebust return -ENOMEM; 48634769fc4S\"J. Bruce Fields\ } 48734769fc4S\"J. Bruce Fields\ 48868c97153STrond Myklebust static struct gss_upcall_msg * 489e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 4907eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 49379a3f20bS\"J. Bruce Fields\ int vers; 4949d3a2260STrond Myklebust int err = -ENOMEM; 4951da177e4SLinus Torvalds 4960f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 497db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 4989d3a2260STrond Myklebust goto err; 499e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 5009d3a2260STrond Myklebust err = vers; 5019d3a2260STrond Myklebust if (err < 0) 5029d3a2260STrond Myklebust goto err_free_msg; 50319172284STrond Myklebust gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; 5041da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 5051da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 5061da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 5071da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 5081da177e4SLinus Torvalds gss_msg->uid = uid; 5091da177e4SLinus Torvalds gss_msg->auth = gss_auth; 510bd4a3eb1STrond Myklebust switch (vers) { 511bd4a3eb1STrond Myklebust case 0: 512bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 5135fccc5b5STrond Myklebust break; 514bd4a3eb1STrond Myklebust default: 5159d3a2260STrond Myklebust err = gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 5169d3a2260STrond Myklebust if (err) 517e9776d0fSTrond Myklebust goto err_put_pipe_version; 518bd4a3eb1STrond Myklebust }; 5199eb2ddb4STrond Myklebust kref_get(&gss_auth->kref); 5201da177e4SLinus Torvalds return gss_msg; 521e9776d0fSTrond Myklebust err_put_pipe_version: 522e9776d0fSTrond Myklebust put_pipe_version(gss_auth->net); 5239d3a2260STrond Myklebust err_free_msg: 5249d3a2260STrond Myklebust kfree(gss_msg); 5259d3a2260STrond Myklebust err: 5269d3a2260STrond Myklebust return ERR_PTR(err); 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds static struct gss_upcall_msg * 530e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 5311da177e4SLinus Torvalds { 5327c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 5337c67db3aSTrond Myklebust struct gss_cred, gc_base); 5341da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 5357eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 5361da177e4SLinus Torvalds 537e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 538db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 539db75b3d6S\"J. Bruce Fields\ return gss_new; 540053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 5411da177e4SLinus Torvalds if (gss_msg == gss_new) { 5429beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 5431da177e4SLinus Torvalds if (res) { 5441da177e4SLinus Torvalds gss_unhash_msg(gss_new); 5451da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds } else 5481da177e4SLinus Torvalds gss_release_msg(gss_new); 5491da177e4SLinus Torvalds return gss_msg; 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds 552b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 553b03568c3S\"J. Bruce Fields\ { 5540ea9de0eSJeff Layton dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); 555b03568c3S\"J. Bruce Fields\ } 556b03568c3S\"J. Bruce Fields\ 5571da177e4SLinus Torvalds static inline int 5581da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5591da177e4SLinus Torvalds { 560a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5614a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5621da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5631da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5641da177e4SLinus Torvalds struct gss_cred, gc_base); 5651da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5669beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5671da177e4SLinus Torvalds int err = 0; 5681da177e4SLinus Torvalds 569632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 570cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 571e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 572480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 57379a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 57479a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 57579a3f20bS\"J. Bruce Fields\ warn_gssd(); 57679a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 57779a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 578d1a8016aSBryan Schumaker return -EAGAIN; 57979a3f20bS\"J. Bruce Fields\ } 5801da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5811da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5821da177e4SLinus Torvalds goto out; 5831da177e4SLinus Torvalds } 5849beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5859beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5861da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5875d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 588126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5891da177e4SLinus Torvalds task->tk_timeout = 0; 5901da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5911da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5921da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5935d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 594126e216aSTrond Myklebust } else { 595126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5961da177e4SLinus Torvalds err = gss_msg->msg.errno; 597126e216aSTrond Myklebust } 5989beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5991da177e4SLinus Torvalds gss_release_msg(gss_msg); 6001da177e4SLinus Torvalds out: 601632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 602cdba321eSEric W. Biederman task->tk_pid, __func__, 603cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 6041da177e4SLinus Torvalds return err; 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds 6071da177e4SLinus Torvalds static inline int 6081da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 6091da177e4SLinus Torvalds { 610e726340aSTrond Myklebust struct net *net = gss_auth->net; 611abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 6129beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6131da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 6141da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6151da177e4SLinus Torvalds DEFINE_WAIT(wait); 616d36ccb9cSTrond Myklebust int err; 6171da177e4SLinus Torvalds 618cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 619cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 62079a3f20bS\"J. Bruce Fields\ retry: 621d36ccb9cSTrond Myklebust err = 0; 62289f84243SJeff Layton /* if gssd is down, just skip upcalling altogether */ 62389f84243SJeff Layton if (!gssd_running(net)) { 62489f84243SJeff Layton warn_gssd(); 62589f84243SJeff Layton return -EACCES; 62689f84243SJeff Layton } 627e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 62879a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 62979a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 63089f84243SJeff Layton sn->pipe_version >= 0, 15 * HZ); 6312aed8b47STrond Myklebust if (sn->pipe_version < 0) { 632d1a8016aSBryan Schumaker warn_gssd(); 633d1a8016aSBryan Schumaker err = -EACCES; 634d1a8016aSBryan Schumaker } 635d36ccb9cSTrond Myklebust if (err < 0) 63679a3f20bS\"J. Bruce Fields\ goto out; 63779a3f20bS\"J. Bruce Fields\ goto retry; 63879a3f20bS\"J. Bruce Fields\ } 6391da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6401da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6411da177e4SLinus Torvalds goto out; 6421da177e4SLinus Torvalds } 6439beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6441da177e4SLinus Torvalds for (;;) { 6455afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6469beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6471da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6481da177e4SLinus Torvalds break; 6491da177e4SLinus Torvalds } 6509beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6515afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6521da177e4SLinus Torvalds err = -ERESTARTSYS; 6531da177e4SLinus Torvalds goto out_intr; 6541da177e4SLinus Torvalds } 6551da177e4SLinus Torvalds schedule(); 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds if (gss_msg->ctx) 6587b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6591da177e4SLinus Torvalds else 6601da177e4SLinus Torvalds err = gss_msg->msg.errno; 6619beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6621da177e4SLinus Torvalds out_intr: 6631da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6641da177e4SLinus Torvalds gss_release_msg(gss_msg); 6651da177e4SLinus Torvalds out: 666632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 667cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6681da177e4SLinus Torvalds return err; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds static ssize_t 6741da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6751da177e4SLinus Torvalds { 6761da177e4SLinus Torvalds const void *p, *end; 6771da177e4SLinus Torvalds void *buf; 6781da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 679496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6801da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 68190602c7bSEric W. Biederman uid_t id; 68290602c7bSEric W. Biederman kuid_t uid; 6833b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6861da177e4SLinus Torvalds goto out; 6871da177e4SLinus Torvalds err = -ENOMEM; 6880f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6891da177e4SLinus Torvalds if (!buf) 6901da177e4SLinus Torvalds goto out; 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds err = -EFAULT; 6931da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6941da177e4SLinus Torvalds goto err; 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 69790602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6981da177e4SLinus Torvalds if (IS_ERR(p)) { 6991da177e4SLinus Torvalds err = PTR_ERR(p); 7001da177e4SLinus Torvalds goto err; 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds 70390602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 70490602c7bSEric W. Biederman if (!uid_valid(uid)) { 70590602c7bSEric W. Biederman err = -EINVAL; 70690602c7bSEric W. Biederman goto err; 70790602c7bSEric W. Biederman } 70890602c7bSEric W. Biederman 7091da177e4SLinus Torvalds err = -ENOMEM; 7101da177e4SLinus Torvalds ctx = gss_alloc_context(); 7111da177e4SLinus Torvalds if (ctx == NULL) 7121da177e4SLinus Torvalds goto err; 7133b68aaeaSTrond Myklebust 7143b68aaeaSTrond Myklebust err = -ENOENT; 7153b68aaeaSTrond Myklebust /* Find a matching upcall */ 7169beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7179beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 7183b68aaeaSTrond Myklebust if (gss_msg == NULL) { 7199beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7203b68aaeaSTrond Myklebust goto err_put_ctx; 7213b68aaeaSTrond Myklebust } 7223b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 7239beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7243b68aaeaSTrond Myklebust 7256e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 7261da177e4SLinus Torvalds if (IS_ERR(p)) { 7271da177e4SLinus Torvalds err = PTR_ERR(p); 728486bad2eSJeff Layton switch (err) { 729486bad2eSJeff Layton case -EACCES: 730dc5ddce9SJeff Layton case -EKEYEXPIRED: 731486bad2eSJeff Layton gss_msg->msg.errno = err; 732486bad2eSJeff Layton err = mlen; 733486bad2eSJeff Layton break; 734486bad2eSJeff Layton case -EFAULT: 735486bad2eSJeff Layton case -ENOMEM: 736486bad2eSJeff Layton case -EINVAL: 737486bad2eSJeff Layton case -ENOSYS: 738486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 739486bad2eSJeff Layton break; 740486bad2eSJeff Layton default: 741486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7426c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 743437b300cSScott Mayhew gss_msg->msg.errno = -EIO; 744486bad2eSJeff Layton } 7453b68aaeaSTrond Myklebust goto err_release_msg; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7483b68aaeaSTrond Myklebust err = mlen; 7493b68aaeaSTrond Myklebust 7503b68aaeaSTrond Myklebust err_release_msg: 7519beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7521da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7539beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7541da177e4SLinus Torvalds gss_release_msg(gss_msg); 7551da177e4SLinus Torvalds err_put_ctx: 7561da177e4SLinus Torvalds gss_put_ctx(ctx); 7571da177e4SLinus Torvalds err: 7581da177e4SLinus Torvalds kfree(buf); 7591da177e4SLinus Torvalds out: 760632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7611da177e4SLinus Torvalds return err; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 76434769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 765cf81939dS\"J. Bruce Fields\ { 7662aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7672aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 76834769fc4S\"J. Bruce Fields\ int ret = 0; 76934769fc4S\"J. Bruce Fields\ 77079a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 7712aed8b47STrond Myklebust if (sn->pipe_version < 0) { 77234769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 7732aed8b47STrond Myklebust sn->pipe_version = new_version; 77479a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 77579a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 7762aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 77734769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 77834769fc4S\"J. Bruce Fields\ ret = -EBUSY; 77934769fc4S\"J. Bruce Fields\ goto out; 78079a3f20bS\"J. Bruce Fields\ } 7812aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 78234769fc4S\"J. Bruce Fields\ out: 78379a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 78434769fc4S\"J. Bruce Fields\ return ret; 78534769fc4S\"J. Bruce Fields\ 78634769fc4S\"J. Bruce Fields\ } 78734769fc4S\"J. Bruce Fields\ 78834769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 78934769fc4S\"J. Bruce Fields\ { 79034769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 79134769fc4S\"J. Bruce Fields\ } 79234769fc4S\"J. Bruce Fields\ 79334769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 79434769fc4S\"J. Bruce Fields\ { 79534769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 796cf81939dS\"J. Bruce Fields\ } 797cf81939dS\"J. Bruce Fields\ 7981da177e4SLinus Torvalds static void 7991da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 8001da177e4SLinus Torvalds { 8012aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8029beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 8031da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 8041da177e4SLinus Torvalds 8055a67657aSTrond Myklebust restart: 8069beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 8079beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 8086e84c7b6STrond Myklebust 8095a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 8105a67657aSTrond Myklebust continue; 8111da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 8121da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 8131da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 8149beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 8151da177e4SLinus Torvalds gss_release_msg(gss_msg); 8165a67657aSTrond Myklebust goto restart; 8171da177e4SLinus Torvalds } 8189beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 819cf81939dS\"J. Bruce Fields\ 8202aed8b47STrond Myklebust put_pipe_version(net); 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds static void 8241da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 8251da177e4SLinus Torvalds { 8261da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds if (msg->errno < 0) { 829632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 830632f0d05SChuck Lever __func__, gss_msg); 8311da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 8321da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 833b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 834b03568c3S\"J. Bruce Fields\ warn_gssd(); 8351da177e4SLinus Torvalds gss_release_msg(gss_msg); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds 83919172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 84019172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 841ccdc28f8SStanislav Kinsbursky { 84219172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 84319172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 844ccdc28f8SStanislav Kinsbursky 84519172284STrond Myklebust if (pipe->dentry != NULL) { 84619172284STrond Myklebust rpc_unlink(pipe->dentry); 84719172284STrond Myklebust pipe->dentry = NULL; 8486b2fddd3STrond Myklebust } 849ccdc28f8SStanislav Kinsbursky } 850ccdc28f8SStanislav Kinsbursky 85119172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 85219172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 853ccdc28f8SStanislav Kinsbursky { 85419172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8556b2fddd3STrond Myklebust struct dentry *dentry; 856ccdc28f8SStanislav Kinsbursky 85719172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 85819172284STrond Myklebust if (IS_ERR(dentry)) 85919172284STrond Myklebust return PTR_ERR(dentry); 86019172284STrond Myklebust p->pipe->dentry = dentry; 861ccdc28f8SStanislav Kinsbursky return 0; 86219172284STrond Myklebust } 863ccdc28f8SStanislav Kinsbursky 86419172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 86519172284STrond Myklebust .create = gss_pipe_dentry_create, 86619172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 86719172284STrond Myklebust }; 86819172284STrond Myklebust 86919172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 87019172284STrond Myklebust const char *name, 87119172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 87219172284STrond Myklebust { 87319172284STrond Myklebust struct gss_pipe *p; 87419172284STrond Myklebust int err = -ENOMEM; 87519172284STrond Myklebust 87619172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 87719172284STrond Myklebust if (p == NULL) 87819172284STrond Myklebust goto err; 87919172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 88019172284STrond Myklebust if (IS_ERR(p->pipe)) { 88119172284STrond Myklebust err = PTR_ERR(p->pipe); 88219172284STrond Myklebust goto err_free_gss_pipe; 88319172284STrond Myklebust } 88419172284STrond Myklebust p->name = name; 88519172284STrond Myklebust p->clnt = clnt; 886414a6295STrond Myklebust kref_init(&p->kref); 88719172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 88819172284STrond Myklebust &gss_pipe_dir_object_ops, 88919172284STrond Myklebust p); 89019172284STrond Myklebust return p; 89119172284STrond Myklebust err_free_gss_pipe: 89219172284STrond Myklebust kfree(p); 8936b2fddd3STrond Myklebust err: 89419172284STrond Myklebust return ERR_PTR(err); 895ccdc28f8SStanislav Kinsbursky } 896ccdc28f8SStanislav Kinsbursky 897414a6295STrond Myklebust struct gss_alloc_pdo { 898414a6295STrond Myklebust struct rpc_clnt *clnt; 899414a6295STrond Myklebust const char *name; 900414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops; 901414a6295STrond Myklebust }; 902414a6295STrond Myklebust 903414a6295STrond Myklebust static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) 904414a6295STrond Myklebust { 905414a6295STrond Myklebust struct gss_pipe *gss_pipe; 906414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 907414a6295STrond Myklebust 908414a6295STrond Myklebust if (pdo->pdo_ops != &gss_pipe_dir_object_ops) 909414a6295STrond Myklebust return 0; 910414a6295STrond Myklebust gss_pipe = container_of(pdo, struct gss_pipe, pdo); 911414a6295STrond Myklebust if (strcmp(gss_pipe->name, args->name) != 0) 912414a6295STrond Myklebust return 0; 913414a6295STrond Myklebust if (!kref_get_unless_zero(&gss_pipe->kref)) 914414a6295STrond Myklebust return 0; 915414a6295STrond Myklebust return 1; 916414a6295STrond Myklebust } 917414a6295STrond Myklebust 918414a6295STrond Myklebust static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) 919414a6295STrond Myklebust { 920414a6295STrond Myklebust struct gss_pipe *gss_pipe; 921414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 922414a6295STrond Myklebust 923414a6295STrond Myklebust gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); 924414a6295STrond Myklebust if (!IS_ERR(gss_pipe)) 925414a6295STrond Myklebust return &gss_pipe->pdo; 926414a6295STrond Myklebust return NULL; 927414a6295STrond Myklebust } 928414a6295STrond Myklebust 929414a6295STrond Myklebust static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, 930414a6295STrond Myklebust const char *name, 931414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 932414a6295STrond Myklebust { 933414a6295STrond Myklebust struct net *net = rpc_net_ns(clnt); 934414a6295STrond Myklebust struct rpc_pipe_dir_object *pdo; 935414a6295STrond Myklebust struct gss_alloc_pdo args = { 936414a6295STrond Myklebust .clnt = clnt, 937414a6295STrond Myklebust .name = name, 938414a6295STrond Myklebust .upcall_ops = upcall_ops, 939414a6295STrond Myklebust }; 940414a6295STrond Myklebust 941414a6295STrond Myklebust pdo = rpc_find_or_alloc_pipe_dir_object(net, 942414a6295STrond Myklebust &clnt->cl_pipedir_objects, 943414a6295STrond Myklebust gss_pipe_match_pdo, 944414a6295STrond Myklebust gss_pipe_alloc_pdo, 945414a6295STrond Myklebust &args); 946414a6295STrond Myklebust if (pdo != NULL) 947414a6295STrond Myklebust return container_of(pdo, struct gss_pipe, pdo); 948414a6295STrond Myklebust return ERR_PTR(-ENOMEM); 949414a6295STrond Myklebust } 950414a6295STrond Myklebust 95119172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 952ccdc28f8SStanislav Kinsbursky { 95319172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 95419172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 955ccdc28f8SStanislav Kinsbursky 95619172284STrond Myklebust rpc_remove_pipe_dir_object(net, 95719172284STrond Myklebust &clnt->cl_pipedir_objects, 95819172284STrond Myklebust &p->pdo); 95919172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 96019172284STrond Myklebust kfree(p); 961ccdc28f8SStanislav Kinsbursky } 962ccdc28f8SStanislav Kinsbursky 963414a6295STrond Myklebust static void __gss_pipe_release(struct kref *kref) 964414a6295STrond Myklebust { 965414a6295STrond Myklebust struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); 966414a6295STrond Myklebust 967414a6295STrond Myklebust __gss_pipe_free(p); 968414a6295STrond Myklebust } 969414a6295STrond Myklebust 97019172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 971ccdc28f8SStanislav Kinsbursky { 97219172284STrond Myklebust if (p != NULL) 973414a6295STrond Myklebust kref_put(&p->kref, __gss_pipe_release); 974ccdc28f8SStanislav Kinsbursky } 975ccdc28f8SStanislav Kinsbursky 9761da177e4SLinus Torvalds /* 9771da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 9781da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 9791da177e4SLinus Torvalds */ 980eb6dc19dSTrond Myklebust static struct gss_auth * 981eb6dc19dSTrond Myklebust gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 9821da177e4SLinus Torvalds { 983c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 9841da177e4SLinus Torvalds struct gss_auth *gss_auth; 98519172284STrond Myklebust struct gss_pipe *gss_pipe; 9861da177e4SLinus Torvalds struct rpc_auth * auth; 9876a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 9926a19275aSJ. Bruce Fields return ERR_PTR(err); 9931da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 9941da177e4SLinus Torvalds goto out_dec; 995eb6dc19dSTrond Myklebust INIT_HLIST_NODE(&gss_auth->hash); 996bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 997c2190661STrond Myklebust if (args->target_name) { 998c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 999bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 1000bd4a3eb1STrond Myklebust goto err_free; 1001bd4a3eb1STrond Myklebust } 10021da177e4SLinus Torvalds gss_auth->client = clnt; 1003e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 10046a19275aSJ. Bruce Fields err = -EINVAL; 10051da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 10061da177e4SLinus Torvalds if (!gss_auth->mech) { 10079b1d75b7STrond Myklebust dprintk("RPC: Pseudoflavor %d not found!\n", flavor); 1008e726340aSTrond Myklebust goto err_put_net; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 1011438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 1012438b6fdeSJ. Bruce Fields goto err_put_mech; 1013a699d65eSTrond Myklebust if (!gssd_running(gss_auth->net)) 1014a699d65eSTrond Myklebust goto err_put_mech; 10151da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 10161da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 10171da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 10181da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 10191da177e4SLinus Torvalds auth->au_flavor = flavor; 10201da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 10210285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 10221da177e4SLinus Torvalds 102319172284STrond Myklebust err = rpcauth_init_credcache(auth); 102419172284STrond Myklebust if (err) 102519172284STrond Myklebust goto err_put_mech; 102634769fc4S\"J. Bruce Fields\ /* 102734769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 102834769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 102934769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 103034769fc4S\"J. Bruce Fields\ * the new pipe first. 103134769fc4S\"J. Bruce Fields\ */ 1032414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); 103319172284STrond Myklebust if (IS_ERR(gss_pipe)) { 103419172284STrond Myklebust err = PTR_ERR(gss_pipe); 103519172284STrond Myklebust goto err_destroy_credcache; 10366a19275aSJ. Bruce Fields } 103719172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 10381da177e4SLinus Torvalds 1039414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, 104019172284STrond Myklebust &gss_upcall_ops_v0); 104119172284STrond Myklebust if (IS_ERR(gss_pipe)) { 104219172284STrond Myklebust err = PTR_ERR(gss_pipe); 1043c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 1044c239d83bSStanislav Kinsbursky } 104519172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 104607a2bf1dSTrond Myklebust 1047eb6dc19dSTrond Myklebust return gss_auth; 1048c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 1049414a6295STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 105019172284STrond Myklebust err_destroy_credcache: 105119172284STrond Myklebust rpcauth_destroy_credcache(auth); 10521da177e4SLinus Torvalds err_put_mech: 10531da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 1054e726340aSTrond Myklebust err_put_net: 1055e726340aSTrond Myklebust put_net(gss_auth->net); 10561da177e4SLinus Torvalds err_free: 1057bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10581da177e4SLinus Torvalds kfree(gss_auth); 10591da177e4SLinus Torvalds out_dec: 10601da177e4SLinus Torvalds module_put(THIS_MODULE); 10616a19275aSJ. Bruce Fields return ERR_PTR(err); 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds static void 10650285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 10660285ed1fSTrond Myklebust { 106719172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 106819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 10690285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 1070e726340aSTrond Myklebust put_net(gss_auth->net); 1071bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10720285ed1fSTrond Myklebust 10730285ed1fSTrond Myklebust kfree(gss_auth); 10740285ed1fSTrond Myklebust module_put(THIS_MODULE); 10750285ed1fSTrond Myklebust } 10760285ed1fSTrond Myklebust 10770285ed1fSTrond Myklebust static void 10780285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 10790285ed1fSTrond Myklebust { 10800285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 10810285ed1fSTrond Myklebust 10820285ed1fSTrond Myklebust gss_free(gss_auth); 10830285ed1fSTrond Myklebust } 10840285ed1fSTrond Myklebust 10850285ed1fSTrond Myklebust static void 10869eb2ddb4STrond Myklebust gss_put_auth(struct gss_auth *gss_auth) 10879eb2ddb4STrond Myklebust { 10889eb2ddb4STrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10899eb2ddb4STrond Myklebust } 10909eb2ddb4STrond Myklebust 10919eb2ddb4STrond Myklebust static void 10921da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 10931da177e4SLinus Torvalds { 109419172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 109519172284STrond Myklebust struct gss_auth, rpc_auth); 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 10981da177e4SLinus Torvalds auth, auth->au_flavor); 10991da177e4SLinus Torvalds 1100eb6dc19dSTrond Myklebust if (hash_hashed(&gss_auth->hash)) { 1101eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1102eb6dc19dSTrond Myklebust hash_del(&gss_auth->hash); 1103eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1104eb6dc19dSTrond Myklebust } 1105eb6dc19dSTrond Myklebust 110619172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 110719172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 110819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 110919172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 11103ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 11113ab9bb72STrond Myklebust 11129eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds 1115a0f6ed8eSJ. Bruce Fields /* 1116a0f6ed8eSJ. Bruce Fields * Auths may be shared between rpc clients that were cloned from a 1117a0f6ed8eSJ. Bruce Fields * common client with the same xprt, if they also share the flavor and 1118a0f6ed8eSJ. Bruce Fields * target_name. 1119a0f6ed8eSJ. Bruce Fields * 1120a0f6ed8eSJ. Bruce Fields * The auth is looked up from the oldest parent sharing the same 1121a0f6ed8eSJ. Bruce Fields * cl_xprt, and the auth itself references only that common parent 1122a0f6ed8eSJ. Bruce Fields * (which is guaranteed to last as long as any of its descendants). 1123a0f6ed8eSJ. Bruce Fields */ 1124eb6dc19dSTrond Myklebust static struct gss_auth * 1125eb6dc19dSTrond Myklebust gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, 1126eb6dc19dSTrond Myklebust struct rpc_clnt *clnt, 1127eb6dc19dSTrond Myklebust struct gss_auth *new) 1128eb6dc19dSTrond Myklebust { 1129eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1130eb6dc19dSTrond Myklebust unsigned long hashval = (unsigned long)clnt; 1131eb6dc19dSTrond Myklebust 1132eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1133eb6dc19dSTrond Myklebust hash_for_each_possible(gss_auth_hash_table, 1134eb6dc19dSTrond Myklebust gss_auth, 1135eb6dc19dSTrond Myklebust hash, 1136eb6dc19dSTrond Myklebust hashval) { 1137a0f6ed8eSJ. Bruce Fields if (gss_auth->client != clnt) 1138a0f6ed8eSJ. Bruce Fields continue; 1139eb6dc19dSTrond Myklebust if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) 1140eb6dc19dSTrond Myklebust continue; 1141eb6dc19dSTrond Myklebust if (gss_auth->target_name != args->target_name) { 1142eb6dc19dSTrond Myklebust if (gss_auth->target_name == NULL) 1143eb6dc19dSTrond Myklebust continue; 1144eb6dc19dSTrond Myklebust if (args->target_name == NULL) 1145eb6dc19dSTrond Myklebust continue; 1146eb6dc19dSTrond Myklebust if (strcmp(gss_auth->target_name, args->target_name)) 1147eb6dc19dSTrond Myklebust continue; 1148eb6dc19dSTrond Myklebust } 1149eb6dc19dSTrond Myklebust if (!atomic_inc_not_zero(&gss_auth->rpc_auth.au_count)) 1150eb6dc19dSTrond Myklebust continue; 1151eb6dc19dSTrond Myklebust goto out; 1152eb6dc19dSTrond Myklebust } 1153eb6dc19dSTrond Myklebust if (new) 1154eb6dc19dSTrond Myklebust hash_add(gss_auth_hash_table, &new->hash, hashval); 1155eb6dc19dSTrond Myklebust gss_auth = new; 1156eb6dc19dSTrond Myklebust out: 1157eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1158eb6dc19dSTrond Myklebust return gss_auth; 1159eb6dc19dSTrond Myklebust } 1160eb6dc19dSTrond Myklebust 1161eb6dc19dSTrond Myklebust static struct gss_auth * 1162eb6dc19dSTrond Myklebust gss_create_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1163eb6dc19dSTrond Myklebust { 1164eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1165eb6dc19dSTrond Myklebust struct gss_auth *new; 1166eb6dc19dSTrond Myklebust 1167eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); 1168eb6dc19dSTrond Myklebust if (gss_auth != NULL) 1169eb6dc19dSTrond Myklebust goto out; 1170eb6dc19dSTrond Myklebust new = gss_create_new(args, clnt); 1171eb6dc19dSTrond Myklebust if (IS_ERR(new)) 1172eb6dc19dSTrond Myklebust return new; 1173eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); 1174eb6dc19dSTrond Myklebust if (gss_auth != new) 1175eb6dc19dSTrond Myklebust gss_destroy(&new->rpc_auth); 1176eb6dc19dSTrond Myklebust out: 1177eb6dc19dSTrond Myklebust return gss_auth; 1178eb6dc19dSTrond Myklebust } 1179eb6dc19dSTrond Myklebust 1180eb6dc19dSTrond Myklebust static struct rpc_auth * 1181eb6dc19dSTrond Myklebust gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1182eb6dc19dSTrond Myklebust { 1183eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1184ad01b2c6STrond Myklebust struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); 1185eb6dc19dSTrond Myklebust 1186eb6dc19dSTrond Myklebust while (clnt != clnt->cl_parent) { 1187eb6dc19dSTrond Myklebust struct rpc_clnt *parent = clnt->cl_parent; 1188eb6dc19dSTrond Myklebust /* Find the original parent for this transport */ 1189ad01b2c6STrond Myklebust if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) 1190eb6dc19dSTrond Myklebust break; 1191eb6dc19dSTrond Myklebust clnt = parent; 1192eb6dc19dSTrond Myklebust } 1193eb6dc19dSTrond Myklebust 1194eb6dc19dSTrond Myklebust gss_auth = gss_create_hashed(args, clnt); 1195eb6dc19dSTrond Myklebust if (IS_ERR(gss_auth)) 1196eb6dc19dSTrond Myklebust return ERR_CAST(gss_auth); 1197eb6dc19dSTrond Myklebust return &gss_auth->rpc_auth; 1198eb6dc19dSTrond Myklebust } 1199eb6dc19dSTrond Myklebust 12000df7fb74STrond Myklebust /* 12010df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 12020df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 12030df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 12040df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 12050df7fb74STrond Myklebust */ 12060df7fb74STrond Myklebust static int 12070df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 12080df7fb74STrond Myklebust { 12090df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12100df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1211c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 12120df7fb74STrond Myklebust struct rpc_task *task; 12130df7fb74STrond Myklebust 1214c5e6aecdSJeff Layton if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 12150df7fb74STrond Myklebust return 0; 12160df7fb74STrond Myklebust 1217c5e6aecdSJeff Layton ctx->gc_proc = RPC_GSS_PROC_DESTROY; 12180df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 12190df7fb74STrond Myklebust 12200df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 12210df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 12220df7fb74STrond Myklebust get_rpccred(cred); 12230df7fb74STrond Myklebust 1224080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 12250df7fb74STrond Myklebust if (!IS_ERR(task)) 12260df7fb74STrond Myklebust rpc_put_task(task); 12270df7fb74STrond Myklebust 12280df7fb74STrond Myklebust put_rpccred(cred); 12290df7fb74STrond Myklebust return 1; 12300df7fb74STrond Myklebust } 12310df7fb74STrond Myklebust 12320df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 12331da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 12341da177e4SLinus Torvalds * allocated before freeing them. */ 12351da177e4SLinus Torvalds static void 12365d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 12371da177e4SLinus Torvalds { 1238632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 12391da177e4SLinus Torvalds 12400d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 12411da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 12422004c726SJeff Layton kfree(ctx->gc_acceptor.data); 12431da177e4SLinus Torvalds kfree(ctx); 12441da177e4SLinus Torvalds } 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds static void 12475d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 12485d28dc82STrond Myklebust { 12495d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 12505d28dc82STrond Myklebust gss_do_free_ctx(ctx); 12515d28dc82STrond Myklebust } 12525d28dc82STrond Myklebust 12535d28dc82STrond Myklebust static void 12545d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 12555d28dc82STrond Myklebust { 12565d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 12575d28dc82STrond Myklebust } 12585d28dc82STrond Myklebust 12595d28dc82STrond Myklebust static void 126031be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 12611da177e4SLinus Torvalds { 1262632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 126331be5bf1STrond Myklebust kfree(gss_cred); 126431be5bf1STrond Myklebust } 12651da177e4SLinus Torvalds 126631be5bf1STrond Myklebust static void 126731be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 126831be5bf1STrond Myklebust { 126931be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 127031be5bf1STrond Myklebust gss_free_cred(gss_cred); 127131be5bf1STrond Myklebust } 12721da177e4SLinus Torvalds 127331be5bf1STrond Myklebust static void 12746dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 127531be5bf1STrond Myklebust { 12765d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12770285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1278c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 12795d28dc82STrond Myklebust 1280a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 128131be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 12825d28dc82STrond Myklebust if (ctx) 12835d28dc82STrond Myklebust gss_put_ctx(ctx); 12849eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds 12876dcd3926SJeff Layton static void 12886dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 12896dcd3926SJeff Layton { 12906dcd3926SJeff Layton 12916dcd3926SJeff Layton if (gss_destroying_context(cred)) 12926dcd3926SJeff Layton return; 12936dcd3926SJeff Layton gss_destroy_nullcred(cred); 12946dcd3926SJeff Layton } 12956dcd3926SJeff Layton 12961da177e4SLinus Torvalds /* 12971da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 12981da177e4SLinus Torvalds */ 12991da177e4SLinus Torvalds static struct rpc_cred * 13008a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 13011da177e4SLinus Torvalds { 13023c6e0bc8SJeff Layton return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); 13031da177e4SLinus Torvalds } 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds static struct rpc_cred * 13063c6e0bc8SJeff Layton gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) 13071da177e4SLinus Torvalds { 13081da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 13091da177e4SLinus Torvalds struct gss_cred *cred = NULL; 13101da177e4SLinus Torvalds int err = -ENOMEM; 13111da177e4SLinus Torvalds 1312632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1313cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1314cdba321eSEric W. Biederman auth->au_flavor); 13151da177e4SLinus Torvalds 13163c6e0bc8SJeff Layton if (!(cred = kzalloc(sizeof(*cred), gfp))) 13171da177e4SLinus Torvalds goto out_err; 13181da177e4SLinus Torvalds 13195fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 13201da177e4SLinus Torvalds /* 13211da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 13221da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 13231da177e4SLinus Torvalds */ 1324fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 13251da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 132668c97153STrond Myklebust cred->gc_principal = NULL; 132768c97153STrond Myklebust if (acred->machine_cred) 132868c97153STrond Myklebust cred->gc_principal = acred->principal; 13290285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 13301da177e4SLinus Torvalds return &cred->gc_base; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds out_err: 1333632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 13341da177e4SLinus Torvalds return ERR_PTR(err); 13351da177e4SLinus Torvalds } 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds static int 1338fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1339fba3bad4STrond Myklebust { 1340fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1341fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1342fba3bad4STrond Myklebust int err; 1343fba3bad4STrond Myklebust 1344fba3bad4STrond Myklebust do { 1345fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1346fba3bad4STrond Myklebust } while (err == -EAGAIN); 1347fba3bad4STrond Myklebust return err; 1348fba3bad4STrond Myklebust } 1349fba3bad4STrond Myklebust 1350a0337d1dSJeff Layton static char * 1351a0337d1dSJeff Layton gss_stringify_acceptor(struct rpc_cred *cred) 1352a0337d1dSJeff Layton { 1353c5e6aecdSJeff Layton char *string = NULL; 1354a0337d1dSJeff Layton struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1355c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1356b3ecba09SJeff Layton unsigned int len; 1357c5e6aecdSJeff Layton struct xdr_netobj *acceptor; 1358c5e6aecdSJeff Layton 1359c5e6aecdSJeff Layton rcu_read_lock(); 1360c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1361c5e6aecdSJeff Layton if (!ctx) 1362c5e6aecdSJeff Layton goto out; 1363c5e6aecdSJeff Layton 1364b3ecba09SJeff Layton len = ctx->gc_acceptor.len; 1365b3ecba09SJeff Layton rcu_read_unlock(); 1366a0337d1dSJeff Layton 1367a0337d1dSJeff Layton /* no point if there's no string */ 1368b3ecba09SJeff Layton if (!len) 1369b3ecba09SJeff Layton return NULL; 1370b3ecba09SJeff Layton realloc: 1371b3ecba09SJeff Layton string = kmalloc(len + 1, GFP_KERNEL); 1372a0337d1dSJeff Layton if (!string) 1373b3ecba09SJeff Layton return NULL; 1374b3ecba09SJeff Layton 1375b3ecba09SJeff Layton rcu_read_lock(); 1376b3ecba09SJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1377b3ecba09SJeff Layton 1378b3ecba09SJeff Layton /* did the ctx disappear or was it replaced by one with no acceptor? */ 1379b3ecba09SJeff Layton if (!ctx || !ctx->gc_acceptor.len) { 1380b3ecba09SJeff Layton kfree(string); 1381b3ecba09SJeff Layton string = NULL; 1382c5e6aecdSJeff Layton goto out; 1383b3ecba09SJeff Layton } 1384b3ecba09SJeff Layton 1385b3ecba09SJeff Layton acceptor = &ctx->gc_acceptor; 1386b3ecba09SJeff Layton 1387b3ecba09SJeff Layton /* 1388b3ecba09SJeff Layton * Did we find a new acceptor that's longer than the original? Allocate 1389b3ecba09SJeff Layton * a longer buffer and try again. 1390b3ecba09SJeff Layton */ 1391b3ecba09SJeff Layton if (len < acceptor->len) { 1392b3ecba09SJeff Layton len = acceptor->len; 1393b3ecba09SJeff Layton rcu_read_unlock(); 1394b3ecba09SJeff Layton kfree(string); 1395b3ecba09SJeff Layton goto realloc; 1396b3ecba09SJeff Layton } 1397a0337d1dSJeff Layton 1398a0337d1dSJeff Layton memcpy(string, acceptor->data, acceptor->len); 1399a0337d1dSJeff Layton string[acceptor->len] = '\0'; 1400c5e6aecdSJeff Layton out: 1401c5e6aecdSJeff Layton rcu_read_unlock(); 1402a0337d1dSJeff Layton return string; 1403a0337d1dSJeff Layton } 1404a0337d1dSJeff Layton 14054de6caa2SAndy Adamson /* 14064de6caa2SAndy Adamson * Returns -EACCES if GSS context is NULL or will expire within the 14074de6caa2SAndy Adamson * timeout (miliseconds) 14084de6caa2SAndy Adamson */ 14094de6caa2SAndy Adamson static int 14104de6caa2SAndy Adamson gss_key_timeout(struct rpc_cred *rc) 14114de6caa2SAndy Adamson { 14124de6caa2SAndy Adamson struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1413c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1414cc6a7aabSArnd Bergmann unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); 1415cc6a7aabSArnd Bergmann int ret = 0; 14164de6caa2SAndy Adamson 1417c5e6aecdSJeff Layton rcu_read_lock(); 1418c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1419cc6a7aabSArnd Bergmann if (!ctx || time_after(timeout, ctx->gc_expiry)) 1420cc6a7aabSArnd Bergmann ret = -EACCES; 1421c5e6aecdSJeff Layton rcu_read_unlock(); 1422cc6a7aabSArnd Bergmann 1423cc6a7aabSArnd Bergmann return ret; 14244de6caa2SAndy Adamson } 14254de6caa2SAndy Adamson 1426fba3bad4STrond Myklebust static int 14278a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 14281da177e4SLinus Torvalds { 14291da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1430c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 14314de6caa2SAndy Adamson int ret; 14321da177e4SLinus Torvalds 1433cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 14348a317760STrond Myklebust goto out; 14351da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1436c5e6aecdSJeff Layton rcu_read_lock(); 1437c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1438c5e6aecdSJeff Layton if (!ctx || time_after(jiffies, ctx->gc_expiry)) { 1439c5e6aecdSJeff Layton rcu_read_unlock(); 1440cd019f75STrond Myklebust return 0; 1441c5e6aecdSJeff Layton } 1442c5e6aecdSJeff Layton rcu_read_unlock(); 1443cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 14441da177e4SLinus Torvalds return 0; 14458a317760STrond Myklebust out: 144668c97153STrond Myklebust if (acred->principal != NULL) { 144768c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 144868c97153STrond Myklebust return 0; 14494de6caa2SAndy Adamson ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; 14504de6caa2SAndy Adamson goto check_expire; 145168c97153STrond Myklebust } 145268c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 14537c67db3aSTrond Myklebust return 0; 14544de6caa2SAndy Adamson ret = uid_eq(rc->cr_uid, acred->uid); 14554de6caa2SAndy Adamson 14564de6caa2SAndy Adamson check_expire: 14574de6caa2SAndy Adamson if (ret == 0) 14584de6caa2SAndy Adamson return ret; 14594de6caa2SAndy Adamson 14604de6caa2SAndy Adamson /* Notify acred users of GSS context expiration timeout */ 14614de6caa2SAndy Adamson if (test_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags) && 14624de6caa2SAndy Adamson (gss_key_timeout(rc) != 0)) { 14634de6caa2SAndy Adamson /* test will now be done from generic cred */ 14644de6caa2SAndy Adamson test_and_clear_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags); 14654de6caa2SAndy Adamson /* tell NFS layer that key will expire soon */ 14664de6caa2SAndy Adamson set_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags); 14674de6caa2SAndy Adamson } 14684de6caa2SAndy Adamson return ret; 14691da177e4SLinus Torvalds } 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds /* 14721da177e4SLinus Torvalds * Marshal credentials. 14731da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 14741da177e4SLinus Torvalds */ 1475d8ed029dSAlexey Dobriyan static __be32 * 1476d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 14771da177e4SLinus Torvalds { 1478a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1479a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 14801da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 14811da177e4SLinus Torvalds gc_base); 14821da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1483d8ed029dSAlexey Dobriyan __be32 *cred_len; 14841da177e4SLinus Torvalds u32 maj_stat = 0; 14851da177e4SLinus Torvalds struct xdr_netobj mic; 14861da177e4SLinus Torvalds struct kvec iov; 14871da177e4SLinus Torvalds struct xdr_buf verf_buf; 14881da177e4SLinus Torvalds 1489632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 14901da177e4SLinus Torvalds 14911da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 14921da177e4SLinus Torvalds cred_len = p++; 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 14951da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 14961da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 14991da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 15001da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 15011da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 15021da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 15031da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 15061da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1507a4f0835cSTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1508808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 15091da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 15101da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds /* set verifier flavor*/ 15131da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 151600fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 15171da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1518fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15191da177e4SLinus Torvalds } else if (maj_stat != 0) { 15201da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 15211da177e4SLinus Torvalds goto out_put_ctx; 15221da177e4SLinus Torvalds } 15231da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 15241da177e4SLinus Torvalds gss_put_ctx(ctx); 15251da177e4SLinus Torvalds return p; 15261da177e4SLinus Torvalds out_put_ctx: 15271da177e4SLinus Torvalds gss_put_ctx(ctx); 15281da177e4SLinus Torvalds return NULL; 15291da177e4SLinus Torvalds } 15301da177e4SLinus Torvalds 1531cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1532cd019f75STrond Myklebust { 1533a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1534cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1535cd019f75STrond Myklebust struct gss_cred, 1536cd019f75STrond Myklebust gc_base); 1537cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1538cd019f75STrond Myklebust struct auth_cred acred = { 1539cd019f75STrond Myklebust .uid = oldcred->cr_uid, 154068c97153STrond Myklebust .principal = gss_cred->gc_principal, 154168c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1542cd019f75STrond Myklebust }; 1543cd019f75STrond Myklebust struct rpc_cred *new; 1544cd019f75STrond Myklebust 1545cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1546cd019f75STrond Myklebust if (IS_ERR(new)) 1547cd019f75STrond Myklebust return PTR_ERR(new); 1548a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1549cd019f75STrond Myklebust put_rpccred(oldcred); 1550cd019f75STrond Myklebust return 0; 1551cd019f75STrond Myklebust } 1552cd019f75STrond Myklebust 1553126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1554126e216aSTrond Myklebust { 1555126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1556126e216aSTrond Myklebust unsigned long now = jiffies; 1557126e216aSTrond Myklebust unsigned long begin, expire; 1558126e216aSTrond Myklebust struct gss_cred *gss_cred; 1559126e216aSTrond Myklebust 1560126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1561126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1562126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1563126e216aSTrond Myklebust 1564126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1565126e216aSTrond Myklebust return 1; 1566126e216aSTrond Myklebust } 1567126e216aSTrond Myklebust return 0; 1568126e216aSTrond Myklebust } 1569126e216aSTrond Myklebust 15701da177e4SLinus Torvalds /* 15711da177e4SLinus Torvalds * Refresh credentials. XXX - finish 15721da177e4SLinus Torvalds */ 15731da177e4SLinus Torvalds static int 15741da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 15751da177e4SLinus Torvalds { 1576a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1577cd019f75STrond Myklebust int ret = 0; 15781da177e4SLinus Torvalds 1579126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1580126e216aSTrond Myklebust return -EKEYEXPIRED; 1581126e216aSTrond Myklebust 1582cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1583cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1584cd019f75STrond Myklebust ret = gss_renew_cred(task); 1585cd019f75STrond Myklebust if (ret < 0) 1586cd019f75STrond Myklebust goto out; 1587a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1588cd019f75STrond Myklebust } 1589cd019f75STrond Myklebust 1590cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1591cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1592cd019f75STrond Myklebust out: 1593cd019f75STrond Myklebust return ret; 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds 15960df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 15970df7fb74STrond Myklebust static int 15980df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 15990df7fb74STrond Myklebust { 1600c297c8b9SAndy Adamson return 0; 16010df7fb74STrond Myklebust } 16020df7fb74STrond Myklebust 1603d8ed029dSAlexey Dobriyan static __be32 * 1604d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 16051da177e4SLinus Torvalds { 1606a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16071da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1608d8ed029dSAlexey Dobriyan __be32 seq; 16091da177e4SLinus Torvalds struct kvec iov; 16101da177e4SLinus Torvalds struct xdr_buf verf_buf; 16111da177e4SLinus Torvalds struct xdr_netobj mic; 16121da177e4SLinus Torvalds u32 flav,len; 16131da177e4SLinus Torvalds u32 maj_stat; 161435fa5f7bSAndy Adamson __be32 *ret = ERR_PTR(-EIO); 16151da177e4SLinus Torvalds 1616632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 16171da177e4SLinus Torvalds 16181da177e4SLinus Torvalds flav = ntohl(*p++); 16191da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 16201da177e4SLinus Torvalds goto out_bad; 16211da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 16221da177e4SLinus Torvalds goto out_bad; 16231da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 16241da177e4SLinus Torvalds iov.iov_base = &seq; 16251da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 16261da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 16271da177e4SLinus Torvalds mic.data = (u8 *)p; 16281da177e4SLinus Torvalds mic.len = len; 16291da177e4SLinus Torvalds 163035fa5f7bSAndy Adamson ret = ERR_PTR(-EACCES); 163100fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 16321da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1633fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 16340df7fb74STrond Myklebust if (maj_stat) { 1635632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1636632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 16371da177e4SLinus Torvalds goto out_bad; 16380df7fb74STrond Myklebust } 163924b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 164024b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 16411be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 16421da177e4SLinus Torvalds gss_put_ctx(ctx); 1643632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1644632f0d05SChuck Lever task->tk_pid, __func__); 16451da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 16461da177e4SLinus Torvalds out_bad: 16471da177e4SLinus Torvalds gss_put_ctx(ctx); 164835fa5f7bSAndy Adamson dprintk("RPC: %5u %s failed ret %ld.\n", task->tk_pid, __func__, 164935fa5f7bSAndy Adamson PTR_ERR(ret)); 165035fa5f7bSAndy Adamson return ret; 16511da177e4SLinus Torvalds } 16521da177e4SLinus Torvalds 16539f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 16549f06c719SChuck Lever __be32 *p, void *obj) 16559f06c719SChuck Lever { 16569f06c719SChuck Lever struct xdr_stream xdr; 16579f06c719SChuck Lever 16589f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 16599f06c719SChuck Lever encode(rqstp, &xdr, obj); 16609f06c719SChuck Lever } 16619f06c719SChuck Lever 16621da177e4SLinus Torvalds static inline int 16631da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 16649f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 16659f06c719SChuck Lever __be32 *p, void *obj) 16661da177e4SLinus Torvalds { 16671da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 16681da177e4SLinus Torvalds struct xdr_buf integ_buf; 1669d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 16701da177e4SLinus Torvalds struct xdr_netobj mic; 1671d8ed029dSAlexey Dobriyan u32 offset; 1672d8ed029dSAlexey Dobriyan __be32 *q; 16731da177e4SLinus Torvalds struct kvec *iov; 16741da177e4SLinus Torvalds u32 maj_stat = 0; 16751da177e4SLinus Torvalds int status = -EIO; 16761da177e4SLinus Torvalds 16771da177e4SLinus Torvalds integ_len = p++; 16781da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 16791da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 16801da177e4SLinus Torvalds 16819f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 16821da177e4SLinus Torvalds 16831da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 16841da177e4SLinus Torvalds offset, snd_buf->len - offset)) 16851da177e4SLinus Torvalds return status; 16861da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 16871da177e4SLinus Torvalds 16881da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 16891da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 16901da177e4SLinus Torvalds iov = snd_buf->tail; 16911da177e4SLinus Torvalds else 16921da177e4SLinus Torvalds iov = snd_buf->head; 16931da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 16941da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 16951da177e4SLinus Torvalds 169600fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 16971da177e4SLinus Torvalds status = -EIO; /* XXX? */ 16981da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1699fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 17001da177e4SLinus Torvalds else if (maj_stat) 17011da177e4SLinus Torvalds return status; 17021da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 17031da177e4SLinus Torvalds 17041da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 17051da177e4SLinus Torvalds iov->iov_len += offset; 17061da177e4SLinus Torvalds snd_buf->len += offset; 17071da177e4SLinus Torvalds return 0; 17081da177e4SLinus Torvalds } 17091da177e4SLinus Torvalds 17102d2da60cSJ. Bruce Fields static void 17112d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 17122d2da60cSJ. Bruce Fields { 17132d2da60cSJ. Bruce Fields int i; 17142d2da60cSJ. Bruce Fields 17152d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 17162d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 17172d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 17182d2da60cSJ. Bruce Fields } 17192d2da60cSJ. Bruce Fields 17202d2da60cSJ. Bruce Fields static int 17212d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 17222d2da60cSJ. Bruce Fields { 17232d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17242d2da60cSJ. Bruce Fields int first, last, i; 17252d2da60cSJ. Bruce Fields 17262d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 17272d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 17282d2da60cSJ. Bruce Fields return 0; 17292d2da60cSJ. Bruce Fields } 17302d2da60cSJ. Bruce Fields 173109cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 173209cbfeafSKirill A. Shutemov last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; 17332d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 17342d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 17352d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 17362d2da60cSJ. Bruce Fields GFP_NOFS); 17372d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 17382d2da60cSJ. Bruce Fields goto out; 17392d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 17402d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 17412d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 17422d2da60cSJ. Bruce Fields goto out_free; 17432d2da60cSJ. Bruce Fields } 17442d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 17452d2da60cSJ. Bruce Fields return 0; 17462d2da60cSJ. Bruce Fields out_free: 1747cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1748cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 17492d2da60cSJ. Bruce Fields out: 17502d2da60cSJ. Bruce Fields return -EAGAIN; 17512d2da60cSJ. Bruce Fields } 17522d2da60cSJ. Bruce Fields 17532d2da60cSJ. Bruce Fields static inline int 17542d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 17559f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 17569f06c719SChuck Lever __be32 *p, void *obj) 17572d2da60cSJ. Bruce Fields { 17582d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17592d2da60cSJ. Bruce Fields u32 offset; 17602d2da60cSJ. Bruce Fields u32 maj_stat; 17612d2da60cSJ. Bruce Fields int status; 1762d8ed029dSAlexey Dobriyan __be32 *opaque_len; 17632d2da60cSJ. Bruce Fields struct page **inpages; 17642d2da60cSJ. Bruce Fields int first; 17652d2da60cSJ. Bruce Fields int pad; 17662d2da60cSJ. Bruce Fields struct kvec *iov; 17672d2da60cSJ. Bruce Fields char *tmp; 17682d2da60cSJ. Bruce Fields 17692d2da60cSJ. Bruce Fields opaque_len = p++; 17702d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17712d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 17722d2da60cSJ. Bruce Fields 17739f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 17742d2da60cSJ. Bruce Fields 17752d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 17762d2da60cSJ. Bruce Fields if (status) 17772d2da60cSJ. Bruce Fields return status; 177809cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 17792d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 17802d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 178109cbfeafSKirill A. Shutemov snd_buf->page_base -= first << PAGE_SHIFT; 17827561042fSKevin Coffman /* 17837561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 17847561042fSKevin Coffman * head when wrapping: 17857561042fSKevin Coffman * 17867561042fSKevin Coffman * call_allocate() allocates twice the slack space required 17877561042fSKevin Coffman * by the authentication flavor to rq_callsize. 17887561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 17897561042fSKevin Coffman */ 17902d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 17912d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 17922d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 17932d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 17942d2da60cSJ. Bruce Fields } 179500fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 17967561042fSKevin Coffman /* slack space should prevent this ever happening: */ 17972d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 17982d2da60cSJ. Bruce Fields status = -EIO; 17992d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 18002d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 18012d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1802fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18032d2da60cSJ. Bruce Fields else if (maj_stat) 18042d2da60cSJ. Bruce Fields return status; 18052d2da60cSJ. Bruce Fields 18062d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 18072d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 18082d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 18092d2da60cSJ. Bruce Fields iov = snd_buf->tail; 18102d2da60cSJ. Bruce Fields else 18112d2da60cSJ. Bruce Fields iov = snd_buf->head; 18122d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 18132d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 18142d2da60cSJ. Bruce Fields memset(p, 0, pad); 18152d2da60cSJ. Bruce Fields iov->iov_len += pad; 18162d2da60cSJ. Bruce Fields snd_buf->len += pad; 18172d2da60cSJ. Bruce Fields 18182d2da60cSJ. Bruce Fields return 0; 18192d2da60cSJ. Bruce Fields } 18202d2da60cSJ. Bruce Fields 18211da177e4SLinus Torvalds static int 18221da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 18239f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 18241da177e4SLinus Torvalds { 1825a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 18261da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 18271da177e4SLinus Torvalds gc_base); 18281da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 18291da177e4SLinus Torvalds int status = -EIO; 18301da177e4SLinus Torvalds 1831632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 18321da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 18331da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 18341da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 18351da177e4SLinus Torvalds */ 18369f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 18379f06c719SChuck Lever status = 0; 18381da177e4SLinus Torvalds goto out; 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds switch (gss_cred->gc_service) { 18411da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 18429f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 18439f06c719SChuck Lever status = 0; 18441da177e4SLinus Torvalds break; 18451da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 184689f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 18471da177e4SLinus Torvalds break; 18481da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 184989f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 18501da177e4SLinus Torvalds break; 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds out: 18531da177e4SLinus Torvalds gss_put_ctx(ctx); 1854632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 18551da177e4SLinus Torvalds return status; 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds 18581da177e4SLinus Torvalds static inline int 18591da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1860d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 18611da177e4SLinus Torvalds { 18621da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 18631da177e4SLinus Torvalds struct xdr_buf integ_buf; 18641da177e4SLinus Torvalds struct xdr_netobj mic; 18651da177e4SLinus Torvalds u32 data_offset, mic_offset; 18661da177e4SLinus Torvalds u32 integ_len; 18671da177e4SLinus Torvalds u32 maj_stat; 18681da177e4SLinus Torvalds int status = -EIO; 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 18711da177e4SLinus Torvalds if (integ_len & 3) 18721da177e4SLinus Torvalds return status; 18731da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 18741da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 18751da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 18761da177e4SLinus Torvalds return status; 18771da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 18781da177e4SLinus Torvalds return status; 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 18811da177e4SLinus Torvalds mic_offset - data_offset)) 18821da177e4SLinus Torvalds return status; 18831da177e4SLinus Torvalds 18841da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 18851da177e4SLinus Torvalds return status; 18861da177e4SLinus Torvalds 188700fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 18881da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1889fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18901da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 18911da177e4SLinus Torvalds return status; 18921da177e4SLinus Torvalds return 0; 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds 18952d2da60cSJ. Bruce Fields static inline int 18962d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1897d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 18982d2da60cSJ. Bruce Fields { 18992d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 19002d2da60cSJ. Bruce Fields u32 offset; 19012d2da60cSJ. Bruce Fields u32 opaque_len; 19022d2da60cSJ. Bruce Fields u32 maj_stat; 19032d2da60cSJ. Bruce Fields int status = -EIO; 19042d2da60cSJ. Bruce Fields 19052d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 19062d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 19072d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 19082d2da60cSJ. Bruce Fields return status; 19092d2da60cSJ. Bruce Fields /* remove padding: */ 19102d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 19112d2da60cSJ. Bruce Fields 191200fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 19132d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1914fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19152d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 19162d2da60cSJ. Bruce Fields return status; 19172d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 19182d2da60cSJ. Bruce Fields return status; 19192d2da60cSJ. Bruce Fields 19202d2da60cSJ. Bruce Fields return 0; 19212d2da60cSJ. Bruce Fields } 19222d2da60cSJ. Bruce Fields 1923bf269551SChuck Lever static int 1924bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1925bf269551SChuck Lever __be32 *p, void *obj) 1926bf269551SChuck Lever { 1927bf269551SChuck Lever struct xdr_stream xdr; 1928bf269551SChuck Lever 1929bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1930bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1931bf269551SChuck Lever } 19322d2da60cSJ. Bruce Fields 19331da177e4SLinus Torvalds static int 19341da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1935bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 19361da177e4SLinus Torvalds { 1937a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 19381da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 19391da177e4SLinus Torvalds gc_base); 19401da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1941d8ed029dSAlexey Dobriyan __be32 *savedp = p; 19422d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 19432d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 19441da177e4SLinus Torvalds int status = -EIO; 19451da177e4SLinus Torvalds 19461da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 19471da177e4SLinus Torvalds goto out_decode; 19481da177e4SLinus Torvalds switch (gss_cred->gc_service) { 19491da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 19501da177e4SLinus Torvalds break; 19511da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 19521da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 19531da177e4SLinus Torvalds if (status) 19541da177e4SLinus Torvalds goto out; 19551da177e4SLinus Torvalds break; 19561da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 19572d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 19582d2da60cSJ. Bruce Fields if (status) 19592d2da60cSJ. Bruce Fields goto out; 19601da177e4SLinus Torvalds break; 19611da177e4SLinus Torvalds } 196224b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 19631be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 19642d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 19651da177e4SLinus Torvalds out_decode: 1966bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 19671da177e4SLinus Torvalds out: 19681da177e4SLinus Torvalds gss_put_ctx(ctx); 1969632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1970632f0d05SChuck Lever task->tk_pid, __func__, status); 19711da177e4SLinus Torvalds return status; 19721da177e4SLinus Torvalds } 19731da177e4SLinus Torvalds 1974f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 19751da177e4SLinus Torvalds .owner = THIS_MODULE, 19761da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 19771da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 19781da177e4SLinus Torvalds .create = gss_create, 19791da177e4SLinus Torvalds .destroy = gss_destroy, 19801da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 198180df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 19826a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 19839568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 1984a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 19851da177e4SLinus Torvalds }; 19861da177e4SLinus Torvalds 1987f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 19881da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 19891da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1990fba3bad4STrond Myklebust .cr_init = gss_cred_init, 19915c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 19921da177e4SLinus Torvalds .crmatch = gss_match, 19931da177e4SLinus Torvalds .crmarshal = gss_marshal, 19941da177e4SLinus Torvalds .crrefresh = gss_refresh, 19951da177e4SLinus Torvalds .crvalidate = gss_validate, 19961da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 19971da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 19984de6caa2SAndy Adamson .crkey_timeout = gss_key_timeout, 1999a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 20001da177e4SLinus Torvalds }; 20011da177e4SLinus Torvalds 20020df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 20030df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 20046dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 20055c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 20060df7fb74STrond Myklebust .crmatch = gss_match, 20070df7fb74STrond Myklebust .crmarshal = gss_marshal, 20080df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 20090df7fb74STrond Myklebust .crvalidate = gss_validate, 20100df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 20110df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 2012a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 20130df7fb74STrond Myklebust }; 20140df7fb74STrond Myklebust 2015b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 2016c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 20171da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 20181da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 201934769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 202034769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 202134769fc4S\"J. Bruce Fields\ }; 202234769fc4S\"J. Bruce Fields\ 2023b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 2024c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 202534769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 202634769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 202734769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 20281da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 20291da177e4SLinus Torvalds }; 20301da177e4SLinus Torvalds 2031a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 2032a1db410dSStanislav Kinsbursky { 2033a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 2034a1db410dSStanislav Kinsbursky } 2035a1db410dSStanislav Kinsbursky 2036a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 2037a1db410dSStanislav Kinsbursky { 2038a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 2039a1db410dSStanislav Kinsbursky } 2040a1db410dSStanislav Kinsbursky 2041a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 2042a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 2043a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 2044a1db410dSStanislav Kinsbursky }; 2045a1db410dSStanislav Kinsbursky 20461da177e4SLinus Torvalds /* 20471da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 20481da177e4SLinus Torvalds */ 20491da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 20501da177e4SLinus Torvalds { 20511da177e4SLinus Torvalds int err = 0; 20521da177e4SLinus Torvalds 20531da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 20541da177e4SLinus Torvalds if (err) 20551da177e4SLinus Torvalds goto out; 20561da177e4SLinus Torvalds err = gss_svc_init(); 20571da177e4SLinus Torvalds if (err) 20581da177e4SLinus Torvalds goto out_unregister; 2059a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 2060a1db410dSStanislav Kinsbursky if (err) 2061a1db410dSStanislav Kinsbursky goto out_svc_exit; 206279a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 20631da177e4SLinus Torvalds return 0; 2064a1db410dSStanislav Kinsbursky out_svc_exit: 2065a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 20661da177e4SLinus Torvalds out_unregister: 20671da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 20681da177e4SLinus Torvalds out: 20691da177e4SLinus Torvalds return err; 20701da177e4SLinus Torvalds } 20711da177e4SLinus Torvalds 20721da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 20731da177e4SLinus Torvalds { 2074a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 20751da177e4SLinus Torvalds gss_svc_shutdown(); 20761da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 2077bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds 208071afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 20811da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2082126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 2083126e216aSTrond Myklebust gss_expired_cred_retry_delay, 2084126e216aSTrond Myklebust uint, 0644); 2085126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 2086126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 2087126e216aSTrond Myklebust 20884de6caa2SAndy Adamson module_param_named(key_expire_timeo, 20894de6caa2SAndy Adamson gss_key_expire_timeo, 20904de6caa2SAndy Adamson uint, 0644); 20914de6caa2SAndy Adamson MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " 20924de6caa2SAndy Adamson "credential keys lifetime where the NFS layer cleans up " 20934de6caa2SAndy Adamson "prior to key expiration"); 20944de6caa2SAndy Adamson 20951da177e4SLinus Torvalds module_init(init_rpcsec_gss) 20961da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 2097