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> 537c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 54eb6dc19dSTrond Myklebust #include <linux/hashtable.h> 551da177e4SLinus Torvalds 56abfdbd53STrond Myklebust #include "../netns.h" 57abfdbd53STrond Myklebust 580c77668dSChuck Lever #include <trace/events/rpcgss.h> 590c77668dSChuck Lever 60f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 611da177e4SLinus Torvalds 62f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 630df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 641da177e4SLinus Torvalds 65126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 66126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 67126e216aSTrond Myklebust 684de6caa2SAndy Adamson #define GSS_KEY_EXPIRE_TIMEO 240 694de6caa2SAndy Adamson static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; 704de6caa2SAndy Adamson 71f895b252SJeff Layton #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) 721da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 731da177e4SLinus Torvalds #endif 741da177e4SLinus Torvalds 75725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 761da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 771da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 78adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 791da177e4SLinus Torvalds 8023c323afSTrond Myklebust static DEFINE_HASHTABLE(gss_auth_hash_table, 4); 81eb6dc19dSTrond Myklebust static DEFINE_SPINLOCK(gss_auth_hash_lock); 82eb6dc19dSTrond Myklebust 8319172284STrond Myklebust struct gss_pipe { 8419172284STrond Myklebust struct rpc_pipe_dir_object pdo; 8519172284STrond Myklebust struct rpc_pipe *pipe; 8619172284STrond Myklebust struct rpc_clnt *clnt; 8719172284STrond Myklebust const char *name; 88414a6295STrond Myklebust struct kref kref; 8919172284STrond Myklebust }; 9019172284STrond Myklebust 911da177e4SLinus Torvalds struct gss_auth { 920285ed1fSTrond Myklebust struct kref kref; 93eb6dc19dSTrond Myklebust struct hlist_node hash; 941da177e4SLinus Torvalds struct rpc_auth rpc_auth; 951da177e4SLinus Torvalds struct gss_api_mech *mech; 961da177e4SLinus Torvalds enum rpc_gss_svc service; 971da177e4SLinus Torvalds struct rpc_clnt *client; 98e726340aSTrond Myklebust struct net *net; 9934769fc4S\"J. Bruce Fields\ /* 10034769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 10134769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 10234769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 10334769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 10434769fc4S\"J. Bruce Fields\ */ 10519172284STrond Myklebust struct gss_pipe *gss_pipe[2]; 106bd4a3eb1STrond Myklebust const char *target_name; 1071da177e4SLinus Torvalds }; 1081da177e4SLinus Torvalds 10979a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 11079a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 11179a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 11279a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 1139eb2ddb4STrond Myklebust static void gss_put_auth(struct gss_auth *gss_auth); 114cf81939dS\"J. Bruce Fields\ 1155d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 116b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 117b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1201da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1211da177e4SLinus Torvalds { 1220fa10472SReshetova, Elena refcount_inc(&ctx->count); 1231da177e4SLinus Torvalds return ctx; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds static inline void 1271da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1281da177e4SLinus Torvalds { 1290fa10472SReshetova, Elena if (refcount_dec_and_test(&ctx->count)) 1305d28dc82STrond Myklebust gss_free_ctx(ctx); 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1335d28dc82STrond Myklebust /* gss_cred_set_ctx: 1345d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1355d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1369beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1375d28dc82STrond Myklebust */ 1381da177e4SLinus Torvalds static void 1391da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1401da177e4SLinus Torvalds { 1411da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1425d28dc82STrond Myklebust 143cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 144cd019f75STrond Myklebust return; 1457b6962b0STrond Myklebust gss_get_ctx(ctx); 146cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 147fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1484e857c58SPeter Zijlstra smp_mb__before_atomic(); 149fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds static const void * 1531da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1541da177e4SLinus Torvalds { 1551da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1561da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1571da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1581da177e4SLinus Torvalds memcpy(res, p, len); 1591da177e4SLinus Torvalds return q; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds static inline const void * 1631da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds const void *q; 1661da177e4SLinus Torvalds unsigned int len; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1691da177e4SLinus Torvalds if (IS_ERR(p)) 1701da177e4SLinus Torvalds return p; 1711da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1721da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1731da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1740f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1751da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1761da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1771da177e4SLinus Torvalds dest->len = len; 1781da177e4SLinus Torvalds return q; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds static struct gss_cl_ctx * 1821da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1831da177e4SLinus Torvalds { 1841da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1851da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1861da177e4SLinus Torvalds 1875d28dc82STrond Myklebust rcu_read_lock(); 188c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 189c5e6aecdSJeff Layton if (ctx) 190c5e6aecdSJeff Layton gss_get_ctx(ctx); 1915d28dc82STrond Myklebust rcu_read_unlock(); 1921da177e4SLinus Torvalds return ctx; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds static struct gss_cl_ctx * 1961da177e4SLinus Torvalds gss_alloc_context(void) 1971da177e4SLinus Torvalds { 1981da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1991da177e4SLinus Torvalds 2000f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 2011da177e4SLinus Torvalds if (ctx != NULL) { 2021da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 2031da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 2041da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 2050fa10472SReshetova, Elena refcount_set(&ctx->count,1); 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds return ctx; 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 2111da177e4SLinus Torvalds static const void * 2121da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2131da177e4SLinus Torvalds { 2141da177e4SLinus Torvalds const void *q; 2151da177e4SLinus Torvalds unsigned int seclen; 2161da177e4SLinus Torvalds unsigned int timeout; 217620038f6SAndy Adamson unsigned long now = jiffies; 2181da177e4SLinus Torvalds u32 window_size; 2191da177e4SLinus Torvalds int ret; 2201da177e4SLinus Torvalds 221620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 222620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 223620038f6SAndy Adamson * the -t value passed to GSSD. 224620038f6SAndy Adamson */ 2251da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2261da177e4SLinus Torvalds if (IS_ERR(p)) 2271da177e4SLinus Torvalds goto err; 2281da177e4SLinus Torvalds if (timeout == 0) 2291da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 230620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 231620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 232620038f6SAndy Adamson * simultaneous requests 233620038f6SAndy Adamson */ 2341da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2351da177e4SLinus Torvalds if (IS_ERR(p)) 2361da177e4SLinus Torvalds goto err; 2371da177e4SLinus Torvalds ctx->gc_win = window_size; 2381da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2391da177e4SLinus Torvalds if (ctx->gc_win == 0) { 240dc5ddce9SJeff Layton /* 241dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 242dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 243dc5ddce9SJeff Layton */ 244dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 245dc5ddce9SJeff Layton if (!IS_ERR(p)) 246dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 247dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2481da177e4SLinus Torvalds goto err; 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds /* copy the opaque wire context */ 2511da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2521da177e4SLinus Torvalds if (IS_ERR(p)) 2531da177e4SLinus Torvalds goto err; 2541da177e4SLinus Torvalds /* import the opaque security context */ 2551da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2561da177e4SLinus Torvalds if (IS_ERR(p)) 2571da177e4SLinus Torvalds goto err; 2581da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2591da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2601da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2611da177e4SLinus Torvalds goto err; 2621da177e4SLinus Torvalds } 263400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2641da177e4SLinus Torvalds if (ret < 0) { 2650c77668dSChuck Lever trace_rpcgss_import_ctx(ret); 2661da177e4SLinus Torvalds p = ERR_PTR(ret); 2671da177e4SLinus Torvalds goto err; 2681da177e4SLinus Torvalds } 2692004c726SJeff Layton 2702004c726SJeff Layton /* is there any trailing data? */ 2712004c726SJeff Layton if (q == end) { 2722004c726SJeff Layton p = q; 2732004c726SJeff Layton goto done; 2742004c726SJeff Layton } 2752004c726SJeff Layton 2762004c726SJeff Layton /* pull in acceptor name (if there is one) */ 2772004c726SJeff Layton p = simple_get_netobj(q, end, &ctx->gc_acceptor); 2782004c726SJeff Layton if (IS_ERR(p)) 2792004c726SJeff Layton goto err; 2802004c726SJeff Layton done: 2810c77668dSChuck Lever trace_rpcgss_context(ctx->gc_expiry, now, timeout, 2820c77668dSChuck Lever ctx->gc_acceptor.len, ctx->gc_acceptor.data); 2831da177e4SLinus Torvalds err: 2841da177e4SLinus Torvalds return p; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 287a1a23777SChuck Lever /* XXX: Need some documentation about why UPCALL_BUF_LEN is so small. 288a1a23777SChuck Lever * Is user space expecting no more than UPCALL_BUF_LEN bytes? 289a1a23777SChuck Lever * Note that there are now _two_ NI_MAXHOST sized data items 290a1a23777SChuck Lever * being passed in this string. 291a1a23777SChuck Lever */ 292a1a23777SChuck Lever #define UPCALL_BUF_LEN 256 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds struct gss_upcall_msg { 2957ff13969SReshetova, Elena refcount_t count; 2967eaf040bSEric W. Biederman kuid_t uid; 2971da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2981da177e4SLinus Torvalds struct list_head list; 2991da177e4SLinus Torvalds struct gss_auth *auth; 3009beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 3011da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 3021da177e4SLinus Torvalds wait_queue_head_t waitqueue; 3031da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 30434769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 3051da177e4SLinus Torvalds }; 3061da177e4SLinus Torvalds 3072aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 30879a3f20bS\"J. Bruce Fields\ { 3092aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 31079a3f20bS\"J. Bruce Fields\ int ret; 31179a3f20bS\"J. Bruce Fields\ 31279a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 3132aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 3142aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 3152aed8b47STrond Myklebust ret = sn->pipe_version; 31679a3f20bS\"J. Bruce Fields\ } else 31779a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 31879a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 31979a3f20bS\"J. Bruce Fields\ return ret; 32079a3f20bS\"J. Bruce Fields\ } 32179a3f20bS\"J. Bruce Fields\ 3222aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 32379a3f20bS\"J. Bruce Fields\ { 3242aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 3252aed8b47STrond Myklebust 3262aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 3272aed8b47STrond Myklebust sn->pipe_version = -1; 32879a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 32979a3f20bS\"J. Bruce Fields\ } 33079a3f20bS\"J. Bruce Fields\ } 33179a3f20bS\"J. Bruce Fields\ 3321da177e4SLinus Torvalds static void 3331da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 3341da177e4SLinus Torvalds { 335e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3367ff13969SReshetova, Elena if (!refcount_dec_and_test(&gss_msg->count)) 3371da177e4SLinus Torvalds return; 3382aed8b47STrond Myklebust put_pipe_version(net); 3391da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3401da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3411da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 342f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3439eb2ddb4STrond Myklebust gss_put_auth(gss_msg->auth); 3441da177e4SLinus Torvalds kfree(gss_msg); 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds static struct gss_upcall_msg * 3489130b8dbSOlga Kornievskaia __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3519beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3520b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3531da177e4SLinus Torvalds continue; 3549130b8dbSOlga Kornievskaia if (auth && pos->auth->service != auth->service) 3559130b8dbSOlga Kornievskaia continue; 3567ff13969SReshetova, Elena refcount_inc(&pos->count); 3571da177e4SLinus Torvalds return pos; 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds return NULL; 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 362720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3631da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3641da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3651da177e4SLinus Torvalds */ 3661da177e4SLinus Torvalds static inline struct gss_upcall_msg * 367053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3681da177e4SLinus Torvalds { 3699beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3701da177e4SLinus Torvalds struct gss_upcall_msg *old; 3711da177e4SLinus Torvalds 3729beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3739130b8dbSOlga Kornievskaia old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth); 3741da177e4SLinus Torvalds if (old == NULL) { 3757ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 3769beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3771da177e4SLinus Torvalds } else 3781da177e4SLinus Torvalds gss_msg = old; 3799beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3801da177e4SLinus Torvalds return gss_msg; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds static void 3841da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3851da177e4SLinus Torvalds { 3861da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3871da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3881da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3897ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds static void 3931da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3941da177e4SLinus Torvalds { 3959beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3961da177e4SLinus Torvalds 3973b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3983b68aaeaSTrond Myklebust return; 3999beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 4003b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 4011da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 4029beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds static void 406126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 407126e216aSTrond Myklebust { 408126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 409126e216aSTrond Myklebust case 0: 410126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 411126e216aSTrond Myklebust break; 412126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 413126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 414126e216aSTrond Myklebust break; 415126e216aSTrond Myklebust case -EKEYEXPIRED: 416126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 417126e216aSTrond Myklebust } 418126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 419126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 420126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 421126e216aSTrond Myklebust } 422126e216aSTrond Myklebust 423126e216aSTrond Myklebust static void 4241da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 4251da177e4SLinus Torvalds { 426a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 4271da177e4SLinus Torvalds struct gss_cred, gc_base); 4281da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 4299beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 4301da177e4SLinus Torvalds 4319beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 432126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 4339beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 434126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 4351da177e4SLinus Torvalds gss_release_msg(gss_msg); 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds 43834769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 43934769fc4S\"J. Bruce Fields\ { 44090602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 44190602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 44290602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 44390602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 4449d3a2260STrond Myklebust 4459d3a2260STrond Myklebust BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); 44634769fc4S\"J. Bruce Fields\ } 44734769fc4S\"J. Bruce Fields\ 4489d3a2260STrond Myklebust static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 449bd4a3eb1STrond Myklebust const char *service_name, 450bd4a3eb1STrond Myklebust const char *target_name) 45134769fc4S\"J. Bruce Fields\ { 452683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4538b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4549d3a2260STrond Myklebust size_t buflen = sizeof(gss_msg->databuf); 4559d3a2260STrond Myklebust int len; 4568b1c7bf5SOlga Kornievskaia 4579d3a2260STrond Myklebust len = scnprintf(p, buflen, "mech=%s uid=%d", mech->gm_name, 45890602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4599d3a2260STrond Myklebust buflen -= len; 4609d3a2260STrond Myklebust p += len; 4619d3a2260STrond Myklebust gss_msg->msg.len = len; 462108b833cSChuck Lever 463108b833cSChuck Lever /* 464108b833cSChuck Lever * target= is a full service principal that names the remote 465108b833cSChuck Lever * identity that we are authenticating to. 466108b833cSChuck Lever */ 467bd4a3eb1STrond Myklebust if (target_name) { 4689d3a2260STrond Myklebust len = scnprintf(p, buflen, " target=%s", target_name); 4699d3a2260STrond Myklebust buflen -= len; 4708b1c7bf5SOlga Kornievskaia p += len; 4718b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4728b1c7bf5SOlga Kornievskaia } 473108b833cSChuck Lever 474108b833cSChuck Lever /* 475108b833cSChuck Lever * gssd uses service= and srchost= to select a matching key from 476108b833cSChuck Lever * the system's keytab to use as the source principal. 477108b833cSChuck Lever * 478108b833cSChuck Lever * service= is the service name part of the source principal, 479108b833cSChuck Lever * or "*" (meaning choose any). 480108b833cSChuck Lever * 481108b833cSChuck Lever * srchost= is the hostname part of the source principal. When 482108b833cSChuck Lever * not provided, gssd uses the local hostname. 483108b833cSChuck Lever */ 484a1a23777SChuck Lever if (service_name) { 485a1a23777SChuck Lever char *c = strchr(service_name, '@'); 486a1a23777SChuck Lever 487a1a23777SChuck Lever if (!c) 488a1a23777SChuck Lever len = scnprintf(p, buflen, " service=%s", 489a1a23777SChuck Lever service_name); 490a1a23777SChuck Lever else 491a1a23777SChuck Lever len = scnprintf(p, buflen, 492a1a23777SChuck Lever " service=%.*s srchost=%s", 493a1a23777SChuck Lever (int)(c - service_name), 494a1a23777SChuck Lever service_name, c + 1); 4959d3a2260STrond Myklebust buflen -= len; 4962efef708SOlga Kornievskaia p += len; 4972efef708SOlga Kornievskaia gss_msg->msg.len += len; 4982efef708SOlga Kornievskaia } 499108b833cSChuck Lever 500683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 5019d3a2260STrond Myklebust len = scnprintf(p, buflen, " enctypes=%s", 5029d3a2260STrond Myklebust mech->gm_upcall_enctypes); 5039d3a2260STrond Myklebust buflen -= len; 504683ac665STrond Myklebust p += len; 505683ac665STrond Myklebust gss_msg->msg.len += len; 506683ac665STrond Myklebust } 5070c77668dSChuck Lever trace_rpcgss_upcall_msg(gss_msg->databuf); 5089d3a2260STrond Myklebust len = scnprintf(p, buflen, "\n"); 5099d3a2260STrond Myklebust if (len == 0) 5109d3a2260STrond Myklebust goto out_overflow; 5118b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 51234769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 5139d3a2260STrond Myklebust return 0; 5149d3a2260STrond Myklebust out_overflow: 5159d3a2260STrond Myklebust WARN_ON_ONCE(1); 5169d3a2260STrond Myklebust return -ENOMEM; 51734769fc4S\"J. Bruce Fields\ } 51834769fc4S\"J. Bruce Fields\ 51968c97153STrond Myklebust static struct gss_upcall_msg * 520e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 5217eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 5221da177e4SLinus Torvalds { 5231da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 52479a3f20bS\"J. Bruce Fields\ int vers; 5259d3a2260STrond Myklebust int err = -ENOMEM; 5261da177e4SLinus Torvalds 5270f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 528db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 5299d3a2260STrond Myklebust goto err; 530e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 5319d3a2260STrond Myklebust err = vers; 5329d3a2260STrond Myklebust if (err < 0) 5339d3a2260STrond Myklebust goto err_free_msg; 53419172284STrond Myklebust gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; 5351da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 5361da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 5371da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 5387ff13969SReshetova, Elena refcount_set(&gss_msg->count, 1); 5391da177e4SLinus Torvalds gss_msg->uid = uid; 5401da177e4SLinus Torvalds gss_msg->auth = gss_auth; 541bd4a3eb1STrond Myklebust switch (vers) { 542bd4a3eb1STrond Myklebust case 0: 543bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 5445fccc5b5STrond Myklebust break; 545bd4a3eb1STrond Myklebust default: 5469d3a2260STrond Myklebust err = gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 5479d3a2260STrond Myklebust if (err) 548e9776d0fSTrond Myklebust goto err_put_pipe_version; 54907d53ae4Szhong jiang } 5509eb2ddb4STrond Myklebust kref_get(&gss_auth->kref); 5511da177e4SLinus Torvalds return gss_msg; 552e9776d0fSTrond Myklebust err_put_pipe_version: 553e9776d0fSTrond Myklebust put_pipe_version(gss_auth->net); 5549d3a2260STrond Myklebust err_free_msg: 5559d3a2260STrond Myklebust kfree(gss_msg); 5569d3a2260STrond Myklebust err: 5579d3a2260STrond Myklebust return ERR_PTR(err); 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds static struct gss_upcall_msg * 561e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 5621da177e4SLinus Torvalds { 5637c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 5647c67db3aSTrond Myklebust struct gss_cred, gc_base); 5651da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 56604d1532bSNeilBrown kuid_t uid = cred->cr_cred->fsuid; 5671da177e4SLinus Torvalds 568e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 569db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 570db75b3d6S\"J. Bruce Fields\ return gss_new; 571053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 5721da177e4SLinus Torvalds if (gss_msg == gss_new) { 5731cded9d2SNeilBrown int res; 5747ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 5751cded9d2SNeilBrown res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 5761da177e4SLinus Torvalds if (res) { 5771da177e4SLinus Torvalds gss_unhash_msg(gss_new); 5787ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 5791cded9d2SNeilBrown gss_release_msg(gss_new); 5801da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds } else 5831da177e4SLinus Torvalds gss_release_msg(gss_new); 5841da177e4SLinus Torvalds return gss_msg; 5851da177e4SLinus Torvalds } 5861da177e4SLinus Torvalds 587b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 588b03568c3S\"J. Bruce Fields\ { 5890ea9de0eSJeff Layton dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); 590b03568c3S\"J. Bruce Fields\ } 591b03568c3S\"J. Bruce Fields\ 5921da177e4SLinus Torvalds static inline int 5931da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5941da177e4SLinus Torvalds { 595a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5964a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5971da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5981da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5991da177e4SLinus Torvalds struct gss_cred, gc_base); 6001da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6019beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6021da177e4SLinus Torvalds int err = 0; 6031da177e4SLinus Torvalds 604e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 605480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 60679a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 60779a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 60879a3f20bS\"J. Bruce Fields\ warn_gssd(); 60979a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 61079a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 6110c77668dSChuck Lever err = -EAGAIN; 6120c77668dSChuck Lever goto out; 61379a3f20bS\"J. Bruce Fields\ } 6141da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6151da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6161da177e4SLinus Torvalds goto out; 6171da177e4SLinus Torvalds } 6189beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6199beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6201da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 6215d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 622126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 6231da177e4SLinus Torvalds task->tk_timeout = 0; 6241da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 6251da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 6267ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 6275d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 628126e216aSTrond Myklebust } else { 629126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 6301da177e4SLinus Torvalds err = gss_msg->msg.errno; 631126e216aSTrond Myklebust } 6329beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6331da177e4SLinus Torvalds gss_release_msg(gss_msg); 6341da177e4SLinus Torvalds out: 6350c77668dSChuck Lever trace_rpcgss_upcall_result(from_kuid(&init_user_ns, 6360c77668dSChuck Lever cred->cr_cred->fsuid), err); 6371da177e4SLinus Torvalds return err; 6381da177e4SLinus Torvalds } 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds static inline int 6411da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 6421da177e4SLinus Torvalds { 643e726340aSTrond Myklebust struct net *net = gss_auth->net; 644abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 6459beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6461da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 6471da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6481da177e4SLinus Torvalds DEFINE_WAIT(wait); 649d36ccb9cSTrond Myklebust int err; 6501da177e4SLinus Torvalds 65179a3f20bS\"J. Bruce Fields\ retry: 652d36ccb9cSTrond Myklebust err = 0; 65389f84243SJeff Layton /* if gssd is down, just skip upcalling altogether */ 65489f84243SJeff Layton if (!gssd_running(net)) { 65589f84243SJeff Layton warn_gssd(); 6560c77668dSChuck Lever err = -EACCES; 6570c77668dSChuck Lever goto out; 65889f84243SJeff Layton } 659e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 66079a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 66179a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 66289f84243SJeff Layton sn->pipe_version >= 0, 15 * HZ); 6632aed8b47STrond Myklebust if (sn->pipe_version < 0) { 664d1a8016aSBryan Schumaker warn_gssd(); 665d1a8016aSBryan Schumaker err = -EACCES; 666d1a8016aSBryan Schumaker } 667d36ccb9cSTrond Myklebust if (err < 0) 66879a3f20bS\"J. Bruce Fields\ goto out; 66979a3f20bS\"J. Bruce Fields\ goto retry; 67079a3f20bS\"J. Bruce Fields\ } 6711da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6721da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6731da177e4SLinus Torvalds goto out; 6741da177e4SLinus Torvalds } 6759beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6761da177e4SLinus Torvalds for (;;) { 6775afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6789beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6791da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds } 6829beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6835afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6841da177e4SLinus Torvalds err = -ERESTARTSYS; 6851da177e4SLinus Torvalds goto out_intr; 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds schedule(); 6881da177e4SLinus Torvalds } 6891da177e4SLinus Torvalds if (gss_msg->ctx) 6907b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6911da177e4SLinus Torvalds else 6921da177e4SLinus Torvalds err = gss_msg->msg.errno; 6939beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6941da177e4SLinus Torvalds out_intr: 6951da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6961da177e4SLinus Torvalds gss_release_msg(gss_msg); 6971da177e4SLinus Torvalds out: 6980c77668dSChuck Lever trace_rpcgss_upcall_result(from_kuid(&init_user_ns, 6990c77668dSChuck Lever cred->cr_cred->fsuid), err); 7001da177e4SLinus Torvalds return err; 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds static ssize_t 7061da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 7071da177e4SLinus Torvalds { 7081da177e4SLinus Torvalds const void *p, *end; 7091da177e4SLinus Torvalds void *buf; 7101da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 711496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 7121da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 71390602c7bSEric W. Biederman uid_t id; 71490602c7bSEric W. Biederman kuid_t uid; 7153b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 7181da177e4SLinus Torvalds goto out; 7191da177e4SLinus Torvalds err = -ENOMEM; 7200f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 7211da177e4SLinus Torvalds if (!buf) 7221da177e4SLinus Torvalds goto out; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds err = -EFAULT; 7251da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 7261da177e4SLinus Torvalds goto err; 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 72990602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 7301da177e4SLinus Torvalds if (IS_ERR(p)) { 7311da177e4SLinus Torvalds err = PTR_ERR(p); 7321da177e4SLinus Torvalds goto err; 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds 73590602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 73690602c7bSEric W. Biederman if (!uid_valid(uid)) { 73790602c7bSEric W. Biederman err = -EINVAL; 73890602c7bSEric W. Biederman goto err; 73990602c7bSEric W. Biederman } 74090602c7bSEric W. Biederman 7411da177e4SLinus Torvalds err = -ENOMEM; 7421da177e4SLinus Torvalds ctx = gss_alloc_context(); 7431da177e4SLinus Torvalds if (ctx == NULL) 7441da177e4SLinus Torvalds goto err; 7453b68aaeaSTrond Myklebust 7463b68aaeaSTrond Myklebust err = -ENOENT; 7473b68aaeaSTrond Myklebust /* Find a matching upcall */ 7489beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7499130b8dbSOlga Kornievskaia gss_msg = __gss_find_upcall(pipe, uid, NULL); 7503b68aaeaSTrond Myklebust if (gss_msg == NULL) { 7519beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7523b68aaeaSTrond Myklebust goto err_put_ctx; 7533b68aaeaSTrond Myklebust } 7543b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 7559beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7563b68aaeaSTrond Myklebust 7576e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 7581da177e4SLinus Torvalds if (IS_ERR(p)) { 7591da177e4SLinus Torvalds err = PTR_ERR(p); 760486bad2eSJeff Layton switch (err) { 761486bad2eSJeff Layton case -EACCES: 762dc5ddce9SJeff Layton case -EKEYEXPIRED: 763486bad2eSJeff Layton gss_msg->msg.errno = err; 764486bad2eSJeff Layton err = mlen; 765486bad2eSJeff Layton break; 766486bad2eSJeff Layton case -EFAULT: 767486bad2eSJeff Layton case -ENOMEM: 768486bad2eSJeff Layton case -EINVAL: 769486bad2eSJeff Layton case -ENOSYS: 770486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 771486bad2eSJeff Layton break; 772486bad2eSJeff Layton default: 773486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7746c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 775437b300cSScott Mayhew gss_msg->msg.errno = -EIO; 776486bad2eSJeff Layton } 7773b68aaeaSTrond Myklebust goto err_release_msg; 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7803b68aaeaSTrond Myklebust err = mlen; 7813b68aaeaSTrond Myklebust 7823b68aaeaSTrond Myklebust err_release_msg: 7839beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7841da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7859beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7861da177e4SLinus Torvalds gss_release_msg(gss_msg); 7871da177e4SLinus Torvalds err_put_ctx: 7881da177e4SLinus Torvalds gss_put_ctx(ctx); 7891da177e4SLinus Torvalds err: 7901da177e4SLinus Torvalds kfree(buf); 7911da177e4SLinus Torvalds out: 7921da177e4SLinus Torvalds return err; 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds 79534769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 796cf81939dS\"J. Bruce Fields\ { 7972aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7982aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 79934769fc4S\"J. Bruce Fields\ int ret = 0; 80034769fc4S\"J. Bruce Fields\ 80179a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 8022aed8b47STrond Myklebust if (sn->pipe_version < 0) { 80334769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 8042aed8b47STrond Myklebust sn->pipe_version = new_version; 80579a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 80679a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 8072aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 80834769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 80934769fc4S\"J. Bruce Fields\ ret = -EBUSY; 81034769fc4S\"J. Bruce Fields\ goto out; 81179a3f20bS\"J. Bruce Fields\ } 8122aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 81334769fc4S\"J. Bruce Fields\ out: 81479a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 81534769fc4S\"J. Bruce Fields\ return ret; 81634769fc4S\"J. Bruce Fields\ 81734769fc4S\"J. Bruce Fields\ } 81834769fc4S\"J. Bruce Fields\ 81934769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 82034769fc4S\"J. Bruce Fields\ { 82134769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 82234769fc4S\"J. Bruce Fields\ } 82334769fc4S\"J. Bruce Fields\ 82434769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 82534769fc4S\"J. Bruce Fields\ { 82634769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 827cf81939dS\"J. Bruce Fields\ } 828cf81939dS\"J. Bruce Fields\ 8291da177e4SLinus Torvalds static void 8301da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 8311da177e4SLinus Torvalds { 8322aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8339beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 8341da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 8351da177e4SLinus Torvalds 8365a67657aSTrond Myklebust restart: 8379beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 8389beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 8396e84c7b6STrond Myklebust 8405a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 8415a67657aSTrond Myklebust continue; 8421da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 8437ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8441da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 8459beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 8461da177e4SLinus Torvalds gss_release_msg(gss_msg); 8475a67657aSTrond Myklebust goto restart; 8481da177e4SLinus Torvalds } 8499beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 850cf81939dS\"J. Bruce Fields\ 8512aed8b47STrond Myklebust put_pipe_version(net); 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds static void 8551da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 8561da177e4SLinus Torvalds { 8571da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds if (msg->errno < 0) { 8607ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8611da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 862b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 863b03568c3S\"J. Bruce Fields\ warn_gssd(); 8641da177e4SLinus Torvalds gss_release_msg(gss_msg); 8651da177e4SLinus Torvalds } 8661cded9d2SNeilBrown gss_release_msg(gss_msg); 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds 86919172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 87019172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 871ccdc28f8SStanislav Kinsbursky { 87219172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 87319172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 874ccdc28f8SStanislav Kinsbursky 87519172284STrond Myklebust if (pipe->dentry != NULL) { 87619172284STrond Myklebust rpc_unlink(pipe->dentry); 87719172284STrond Myklebust pipe->dentry = NULL; 8786b2fddd3STrond Myklebust } 879ccdc28f8SStanislav Kinsbursky } 880ccdc28f8SStanislav Kinsbursky 88119172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 88219172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 883ccdc28f8SStanislav Kinsbursky { 88419172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8856b2fddd3STrond Myklebust struct dentry *dentry; 886ccdc28f8SStanislav Kinsbursky 88719172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 88819172284STrond Myklebust if (IS_ERR(dentry)) 88919172284STrond Myklebust return PTR_ERR(dentry); 89019172284STrond Myklebust p->pipe->dentry = dentry; 891ccdc28f8SStanislav Kinsbursky return 0; 89219172284STrond Myklebust } 893ccdc28f8SStanislav Kinsbursky 89419172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 89519172284STrond Myklebust .create = gss_pipe_dentry_create, 89619172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 89719172284STrond Myklebust }; 89819172284STrond Myklebust 89919172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 90019172284STrond Myklebust const char *name, 90119172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 90219172284STrond Myklebust { 90319172284STrond Myklebust struct gss_pipe *p; 90419172284STrond Myklebust int err = -ENOMEM; 90519172284STrond Myklebust 90619172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 90719172284STrond Myklebust if (p == NULL) 90819172284STrond Myklebust goto err; 90919172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 91019172284STrond Myklebust if (IS_ERR(p->pipe)) { 91119172284STrond Myklebust err = PTR_ERR(p->pipe); 91219172284STrond Myklebust goto err_free_gss_pipe; 91319172284STrond Myklebust } 91419172284STrond Myklebust p->name = name; 91519172284STrond Myklebust p->clnt = clnt; 916414a6295STrond Myklebust kref_init(&p->kref); 91719172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 91819172284STrond Myklebust &gss_pipe_dir_object_ops, 91919172284STrond Myklebust p); 92019172284STrond Myklebust return p; 92119172284STrond Myklebust err_free_gss_pipe: 92219172284STrond Myklebust kfree(p); 9236b2fddd3STrond Myklebust err: 92419172284STrond Myklebust return ERR_PTR(err); 925ccdc28f8SStanislav Kinsbursky } 926ccdc28f8SStanislav Kinsbursky 927414a6295STrond Myklebust struct gss_alloc_pdo { 928414a6295STrond Myklebust struct rpc_clnt *clnt; 929414a6295STrond Myklebust const char *name; 930414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops; 931414a6295STrond Myklebust }; 932414a6295STrond Myklebust 933414a6295STrond Myklebust static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) 934414a6295STrond Myklebust { 935414a6295STrond Myklebust struct gss_pipe *gss_pipe; 936414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 937414a6295STrond Myklebust 938414a6295STrond Myklebust if (pdo->pdo_ops != &gss_pipe_dir_object_ops) 939414a6295STrond Myklebust return 0; 940414a6295STrond Myklebust gss_pipe = container_of(pdo, struct gss_pipe, pdo); 941414a6295STrond Myklebust if (strcmp(gss_pipe->name, args->name) != 0) 942414a6295STrond Myklebust return 0; 943414a6295STrond Myklebust if (!kref_get_unless_zero(&gss_pipe->kref)) 944414a6295STrond Myklebust return 0; 945414a6295STrond Myklebust return 1; 946414a6295STrond Myklebust } 947414a6295STrond Myklebust 948414a6295STrond Myklebust static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) 949414a6295STrond Myklebust { 950414a6295STrond Myklebust struct gss_pipe *gss_pipe; 951414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 952414a6295STrond Myklebust 953414a6295STrond Myklebust gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); 954414a6295STrond Myklebust if (!IS_ERR(gss_pipe)) 955414a6295STrond Myklebust return &gss_pipe->pdo; 956414a6295STrond Myklebust return NULL; 957414a6295STrond Myklebust } 958414a6295STrond Myklebust 959414a6295STrond Myklebust static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, 960414a6295STrond Myklebust const char *name, 961414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 962414a6295STrond Myklebust { 963414a6295STrond Myklebust struct net *net = rpc_net_ns(clnt); 964414a6295STrond Myklebust struct rpc_pipe_dir_object *pdo; 965414a6295STrond Myklebust struct gss_alloc_pdo args = { 966414a6295STrond Myklebust .clnt = clnt, 967414a6295STrond Myklebust .name = name, 968414a6295STrond Myklebust .upcall_ops = upcall_ops, 969414a6295STrond Myklebust }; 970414a6295STrond Myklebust 971414a6295STrond Myklebust pdo = rpc_find_or_alloc_pipe_dir_object(net, 972414a6295STrond Myklebust &clnt->cl_pipedir_objects, 973414a6295STrond Myklebust gss_pipe_match_pdo, 974414a6295STrond Myklebust gss_pipe_alloc_pdo, 975414a6295STrond Myklebust &args); 976414a6295STrond Myklebust if (pdo != NULL) 977414a6295STrond Myklebust return container_of(pdo, struct gss_pipe, pdo); 978414a6295STrond Myklebust return ERR_PTR(-ENOMEM); 979414a6295STrond Myklebust } 980414a6295STrond Myklebust 98119172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 982ccdc28f8SStanislav Kinsbursky { 98319172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 98419172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 985ccdc28f8SStanislav Kinsbursky 98619172284STrond Myklebust rpc_remove_pipe_dir_object(net, 98719172284STrond Myklebust &clnt->cl_pipedir_objects, 98819172284STrond Myklebust &p->pdo); 98919172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 99019172284STrond Myklebust kfree(p); 991ccdc28f8SStanislav Kinsbursky } 992ccdc28f8SStanislav Kinsbursky 993414a6295STrond Myklebust static void __gss_pipe_release(struct kref *kref) 994414a6295STrond Myklebust { 995414a6295STrond Myklebust struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); 996414a6295STrond Myklebust 997414a6295STrond Myklebust __gss_pipe_free(p); 998414a6295STrond Myklebust } 999414a6295STrond Myklebust 100019172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 1001ccdc28f8SStanislav Kinsbursky { 100219172284STrond Myklebust if (p != NULL) 1003414a6295STrond Myklebust kref_put(&p->kref, __gss_pipe_release); 1004ccdc28f8SStanislav Kinsbursky } 1005ccdc28f8SStanislav Kinsbursky 10061da177e4SLinus Torvalds /* 10071da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 10081da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 10091da177e4SLinus Torvalds */ 1010eb6dc19dSTrond Myklebust static struct gss_auth * 101182b98ca5SSargun Dhillon gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 10121da177e4SLinus Torvalds { 1013c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 10141da177e4SLinus Torvalds struct gss_auth *gss_auth; 101519172284STrond Myklebust struct gss_pipe *gss_pipe; 10161da177e4SLinus Torvalds struct rpc_auth * auth; 10176a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 10206a19275aSJ. Bruce Fields return ERR_PTR(err); 10211da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 10221da177e4SLinus Torvalds goto out_dec; 1023eb6dc19dSTrond Myklebust INIT_HLIST_NODE(&gss_auth->hash); 1024bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 1025c2190661STrond Myklebust if (args->target_name) { 1026c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 1027bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 1028bd4a3eb1STrond Myklebust goto err_free; 1029bd4a3eb1STrond Myklebust } 10301da177e4SLinus Torvalds gss_auth->client = clnt; 1031e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 10326a19275aSJ. Bruce Fields err = -EINVAL; 10331da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 10340c77668dSChuck Lever if (!gss_auth->mech) 1035e726340aSTrond Myklebust goto err_put_net; 10361da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 1037438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 1038438b6fdeSJ. Bruce Fields goto err_put_mech; 1039a699d65eSTrond Myklebust if (!gssd_running(gss_auth->net)) 1040a699d65eSTrond Myklebust goto err_put_mech; 10411da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 10421da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 10431da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 1044ce52914eSScott Mayhew auth->au_flags = 0; 10451da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 10461da177e4SLinus Torvalds auth->au_flavor = flavor; 104765b80179SChuck Lever if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor)) 104865b80179SChuck Lever auth->au_flags |= RPCAUTH_AUTH_DATATOUCH; 1049331bc71cSTrond Myklebust refcount_set(&auth->au_count, 1); 10500285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 10511da177e4SLinus Torvalds 105219172284STrond Myklebust err = rpcauth_init_credcache(auth); 105319172284STrond Myklebust if (err) 105419172284STrond Myklebust goto err_put_mech; 105534769fc4S\"J. Bruce Fields\ /* 105634769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 105734769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 105834769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 105934769fc4S\"J. Bruce Fields\ * the new pipe first. 106034769fc4S\"J. Bruce Fields\ */ 1061414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); 106219172284STrond Myklebust if (IS_ERR(gss_pipe)) { 106319172284STrond Myklebust err = PTR_ERR(gss_pipe); 106419172284STrond Myklebust goto err_destroy_credcache; 10656a19275aSJ. Bruce Fields } 106619172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 10671da177e4SLinus Torvalds 1068414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, 106919172284STrond Myklebust &gss_upcall_ops_v0); 107019172284STrond Myklebust if (IS_ERR(gss_pipe)) { 107119172284STrond Myklebust err = PTR_ERR(gss_pipe); 1072c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 1073c239d83bSStanislav Kinsbursky } 107419172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 107507a2bf1dSTrond Myklebust 1076eb6dc19dSTrond Myklebust return gss_auth; 1077c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 1078414a6295STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 107919172284STrond Myklebust err_destroy_credcache: 108019172284STrond Myklebust rpcauth_destroy_credcache(auth); 10811da177e4SLinus Torvalds err_put_mech: 10821da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 1083e726340aSTrond Myklebust err_put_net: 1084e726340aSTrond Myklebust put_net(gss_auth->net); 10851da177e4SLinus Torvalds err_free: 1086bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10871da177e4SLinus Torvalds kfree(gss_auth); 10881da177e4SLinus Torvalds out_dec: 10891da177e4SLinus Torvalds module_put(THIS_MODULE); 10900c77668dSChuck Lever trace_rpcgss_createauth(flavor, err); 10916a19275aSJ. Bruce Fields return ERR_PTR(err); 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds static void 10950285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 10960285ed1fSTrond Myklebust { 109719172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 109819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 10990285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 1100e726340aSTrond Myklebust put_net(gss_auth->net); 1101bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 11020285ed1fSTrond Myklebust 11030285ed1fSTrond Myklebust kfree(gss_auth); 11040285ed1fSTrond Myklebust module_put(THIS_MODULE); 11050285ed1fSTrond Myklebust } 11060285ed1fSTrond Myklebust 11070285ed1fSTrond Myklebust static void 11080285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 11090285ed1fSTrond Myklebust { 11100285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 11110285ed1fSTrond Myklebust 11120285ed1fSTrond Myklebust gss_free(gss_auth); 11130285ed1fSTrond Myklebust } 11140285ed1fSTrond Myklebust 11150285ed1fSTrond Myklebust static void 11169eb2ddb4STrond Myklebust gss_put_auth(struct gss_auth *gss_auth) 11179eb2ddb4STrond Myklebust { 11189eb2ddb4STrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 11199eb2ddb4STrond Myklebust } 11209eb2ddb4STrond Myklebust 11219eb2ddb4STrond Myklebust static void 11221da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 11231da177e4SLinus Torvalds { 112419172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 112519172284STrond Myklebust struct gss_auth, rpc_auth); 11261da177e4SLinus Torvalds 1127eb6dc19dSTrond Myklebust if (hash_hashed(&gss_auth->hash)) { 1128eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1129eb6dc19dSTrond Myklebust hash_del(&gss_auth->hash); 1130eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1131eb6dc19dSTrond Myklebust } 1132eb6dc19dSTrond Myklebust 113319172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 113419172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 113519172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 113619172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 11373ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 11383ab9bb72STrond Myklebust 11399eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 1142a0f6ed8eSJ. Bruce Fields /* 1143a0f6ed8eSJ. Bruce Fields * Auths may be shared between rpc clients that were cloned from a 1144a0f6ed8eSJ. Bruce Fields * common client with the same xprt, if they also share the flavor and 1145a0f6ed8eSJ. Bruce Fields * target_name. 1146a0f6ed8eSJ. Bruce Fields * 1147a0f6ed8eSJ. Bruce Fields * The auth is looked up from the oldest parent sharing the same 1148a0f6ed8eSJ. Bruce Fields * cl_xprt, and the auth itself references only that common parent 1149a0f6ed8eSJ. Bruce Fields * (which is guaranteed to last as long as any of its descendants). 1150a0f6ed8eSJ. Bruce Fields */ 1151eb6dc19dSTrond Myklebust static struct gss_auth * 115282b98ca5SSargun Dhillon gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args, 1153eb6dc19dSTrond Myklebust struct rpc_clnt *clnt, 1154eb6dc19dSTrond Myklebust struct gss_auth *new) 1155eb6dc19dSTrond Myklebust { 1156eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1157eb6dc19dSTrond Myklebust unsigned long hashval = (unsigned long)clnt; 1158eb6dc19dSTrond Myklebust 1159eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1160eb6dc19dSTrond Myklebust hash_for_each_possible(gss_auth_hash_table, 1161eb6dc19dSTrond Myklebust gss_auth, 1162eb6dc19dSTrond Myklebust hash, 1163eb6dc19dSTrond Myklebust hashval) { 1164a0f6ed8eSJ. Bruce Fields if (gss_auth->client != clnt) 1165a0f6ed8eSJ. Bruce Fields continue; 1166eb6dc19dSTrond Myklebust if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) 1167eb6dc19dSTrond Myklebust continue; 1168eb6dc19dSTrond Myklebust if (gss_auth->target_name != args->target_name) { 1169eb6dc19dSTrond Myklebust if (gss_auth->target_name == NULL) 1170eb6dc19dSTrond Myklebust continue; 1171eb6dc19dSTrond Myklebust if (args->target_name == NULL) 1172eb6dc19dSTrond Myklebust continue; 1173eb6dc19dSTrond Myklebust if (strcmp(gss_auth->target_name, args->target_name)) 1174eb6dc19dSTrond Myklebust continue; 1175eb6dc19dSTrond Myklebust } 1176331bc71cSTrond Myklebust if (!refcount_inc_not_zero(&gss_auth->rpc_auth.au_count)) 1177eb6dc19dSTrond Myklebust continue; 1178eb6dc19dSTrond Myklebust goto out; 1179eb6dc19dSTrond Myklebust } 1180eb6dc19dSTrond Myklebust if (new) 1181eb6dc19dSTrond Myklebust hash_add(gss_auth_hash_table, &new->hash, hashval); 1182eb6dc19dSTrond Myklebust gss_auth = new; 1183eb6dc19dSTrond Myklebust out: 1184eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1185eb6dc19dSTrond Myklebust return gss_auth; 1186eb6dc19dSTrond Myklebust } 1187eb6dc19dSTrond Myklebust 1188eb6dc19dSTrond Myklebust static struct gss_auth * 118982b98ca5SSargun Dhillon gss_create_hashed(const struct rpc_auth_create_args *args, 119082b98ca5SSargun Dhillon struct rpc_clnt *clnt) 1191eb6dc19dSTrond Myklebust { 1192eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1193eb6dc19dSTrond Myklebust struct gss_auth *new; 1194eb6dc19dSTrond Myklebust 1195eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); 1196eb6dc19dSTrond Myklebust if (gss_auth != NULL) 1197eb6dc19dSTrond Myklebust goto out; 1198eb6dc19dSTrond Myklebust new = gss_create_new(args, clnt); 1199eb6dc19dSTrond Myklebust if (IS_ERR(new)) 1200eb6dc19dSTrond Myklebust return new; 1201eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); 1202eb6dc19dSTrond Myklebust if (gss_auth != new) 1203eb6dc19dSTrond Myklebust gss_destroy(&new->rpc_auth); 1204eb6dc19dSTrond Myklebust out: 1205eb6dc19dSTrond Myklebust return gss_auth; 1206eb6dc19dSTrond Myklebust } 1207eb6dc19dSTrond Myklebust 1208eb6dc19dSTrond Myklebust static struct rpc_auth * 120982b98ca5SSargun Dhillon gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1210eb6dc19dSTrond Myklebust { 1211eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1212ad01b2c6STrond Myklebust struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); 1213eb6dc19dSTrond Myklebust 1214eb6dc19dSTrond Myklebust while (clnt != clnt->cl_parent) { 1215eb6dc19dSTrond Myklebust struct rpc_clnt *parent = clnt->cl_parent; 1216eb6dc19dSTrond Myklebust /* Find the original parent for this transport */ 1217ad01b2c6STrond Myklebust if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) 1218eb6dc19dSTrond Myklebust break; 1219eb6dc19dSTrond Myklebust clnt = parent; 1220eb6dc19dSTrond Myklebust } 1221eb6dc19dSTrond Myklebust 1222eb6dc19dSTrond Myklebust gss_auth = gss_create_hashed(args, clnt); 1223eb6dc19dSTrond Myklebust if (IS_ERR(gss_auth)) 1224eb6dc19dSTrond Myklebust return ERR_CAST(gss_auth); 1225eb6dc19dSTrond Myklebust return &gss_auth->rpc_auth; 1226eb6dc19dSTrond Myklebust } 1227eb6dc19dSTrond Myklebust 1228a652a4bcSTrond Myklebust static struct gss_cred * 1229a652a4bcSTrond Myklebust gss_dup_cred(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 1230a652a4bcSTrond Myklebust { 1231a652a4bcSTrond Myklebust struct gss_cred *new; 1232a652a4bcSTrond Myklebust 1233a652a4bcSTrond Myklebust /* Make a copy of the cred so that we can reference count it */ 1234a652a4bcSTrond Myklebust new = kzalloc(sizeof(*gss_cred), GFP_NOIO); 1235a652a4bcSTrond Myklebust if (new) { 1236a652a4bcSTrond Myklebust struct auth_cred acred = { 12378276c902SNeilBrown .cred = gss_cred->gc_base.cr_cred, 1238a652a4bcSTrond Myklebust }; 1239a652a4bcSTrond Myklebust struct gss_cl_ctx *ctx = 1240a652a4bcSTrond Myklebust rcu_dereference_protected(gss_cred->gc_ctx, 1); 1241a652a4bcSTrond Myklebust 1242a652a4bcSTrond Myklebust rpcauth_init_cred(&new->gc_base, &acred, 1243a652a4bcSTrond Myklebust &gss_auth->rpc_auth, 1244a652a4bcSTrond Myklebust &gss_nullops); 1245a652a4bcSTrond Myklebust new->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE; 1246a652a4bcSTrond Myklebust new->gc_service = gss_cred->gc_service; 1247a652a4bcSTrond Myklebust new->gc_principal = gss_cred->gc_principal; 1248a652a4bcSTrond Myklebust kref_get(&gss_auth->kref); 1249a652a4bcSTrond Myklebust rcu_assign_pointer(new->gc_ctx, ctx); 1250a652a4bcSTrond Myklebust gss_get_ctx(ctx); 1251a652a4bcSTrond Myklebust } 1252a652a4bcSTrond Myklebust return new; 1253a652a4bcSTrond Myklebust } 1254a652a4bcSTrond Myklebust 12550df7fb74STrond Myklebust /* 1256a652a4bcSTrond Myklebust * gss_send_destroy_context will cause the RPCSEC_GSS to send a NULL RPC call 12570df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 12580df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 12590df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 12600df7fb74STrond Myklebust */ 1261a652a4bcSTrond Myklebust static void 1262a652a4bcSTrond Myklebust gss_send_destroy_context(struct rpc_cred *cred) 12630df7fb74STrond Myklebust { 12640df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12650df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1266c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 1267a652a4bcSTrond Myklebust struct gss_cred *new; 12680df7fb74STrond Myklebust struct rpc_task *task; 12690df7fb74STrond Myklebust 1270a652a4bcSTrond Myklebust new = gss_dup_cred(gss_auth, gss_cred); 1271a652a4bcSTrond Myklebust if (new) { 1272c5e6aecdSJeff Layton ctx->gc_proc = RPC_GSS_PROC_DESTROY; 12730df7fb74STrond Myklebust 1274a652a4bcSTrond Myklebust task = rpc_call_null(gss_auth->client, &new->gc_base, 1275a652a4bcSTrond Myklebust RPC_TASK_ASYNC|RPC_TASK_SOFT); 12760df7fb74STrond Myklebust if (!IS_ERR(task)) 12770df7fb74STrond Myklebust rpc_put_task(task); 12780df7fb74STrond Myklebust 1279a652a4bcSTrond Myklebust put_rpccred(&new->gc_base); 1280a652a4bcSTrond Myklebust } 12810df7fb74STrond Myklebust } 12820df7fb74STrond Myklebust 12830df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 12841da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 12851da177e4SLinus Torvalds * allocated before freeing them. */ 12861da177e4SLinus Torvalds static void 12875d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 12881da177e4SLinus Torvalds { 12890d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 12901da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 12912004c726SJeff Layton kfree(ctx->gc_acceptor.data); 12921da177e4SLinus Torvalds kfree(ctx); 12931da177e4SLinus Torvalds } 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds static void 12965d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 12975d28dc82STrond Myklebust { 12985d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 12995d28dc82STrond Myklebust gss_do_free_ctx(ctx); 13005d28dc82STrond Myklebust } 13015d28dc82STrond Myklebust 13025d28dc82STrond Myklebust static void 13035d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 13045d28dc82STrond Myklebust { 13055d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 13065d28dc82STrond Myklebust } 13075d28dc82STrond Myklebust 13085d28dc82STrond Myklebust static void 130931be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 13101da177e4SLinus Torvalds { 131131be5bf1STrond Myklebust kfree(gss_cred); 131231be5bf1STrond Myklebust } 13131da177e4SLinus Torvalds 131431be5bf1STrond Myklebust static void 131531be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 131631be5bf1STrond Myklebust { 131731be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 131831be5bf1STrond Myklebust gss_free_cred(gss_cred); 131931be5bf1STrond Myklebust } 13201da177e4SLinus Torvalds 132131be5bf1STrond Myklebust static void 13226dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 132331be5bf1STrond Myklebust { 13245d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 13250285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1326c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 13275d28dc82STrond Myklebust 1328a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 132997f68c6bSNeilBrown put_cred(cred->cr_cred); 133031be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 13315d28dc82STrond Myklebust if (ctx) 13325d28dc82STrond Myklebust gss_put_ctx(ctx); 13339eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 13341da177e4SLinus Torvalds } 13351da177e4SLinus Torvalds 13366dcd3926SJeff Layton static void 13376dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 13386dcd3926SJeff Layton { 13396dcd3926SJeff Layton 1340a652a4bcSTrond Myklebust if (test_and_clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) 1341a652a4bcSTrond Myklebust gss_send_destroy_context(cred); 13426dcd3926SJeff Layton gss_destroy_nullcred(cred); 13436dcd3926SJeff Layton } 13446dcd3926SJeff Layton 1345a960f8d6SFrank Sorenson static int 1346a960f8d6SFrank Sorenson gss_hash_cred(struct auth_cred *acred, unsigned int hashbits) 1347a960f8d6SFrank Sorenson { 13488276c902SNeilBrown return hash_64(from_kuid(&init_user_ns, acred->cred->fsuid), hashbits); 1349a960f8d6SFrank Sorenson } 1350a960f8d6SFrank Sorenson 13511da177e4SLinus Torvalds /* 13521da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 13531da177e4SLinus Torvalds */ 13541da177e4SLinus Torvalds static struct rpc_cred * 13558a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 13561da177e4SLinus Torvalds { 13573c6e0bc8SJeff Layton return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds static struct rpc_cred * 13613c6e0bc8SJeff Layton gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) 13621da177e4SLinus Torvalds { 13631da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 13641da177e4SLinus Torvalds struct gss_cred *cred = NULL; 13651da177e4SLinus Torvalds int err = -ENOMEM; 13661da177e4SLinus Torvalds 13673c6e0bc8SJeff Layton if (!(cred = kzalloc(sizeof(*cred), gfp))) 13681da177e4SLinus Torvalds goto out_err; 13691da177e4SLinus Torvalds 13705fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 13711da177e4SLinus Torvalds /* 13721da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 13731da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 13741da177e4SLinus Torvalds */ 1375fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 13761da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 137768c97153STrond Myklebust cred->gc_principal = acred->principal; 13780285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 13791da177e4SLinus Torvalds return &cred->gc_base; 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds out_err: 13821da177e4SLinus Torvalds return ERR_PTR(err); 13831da177e4SLinus Torvalds } 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds static int 1386fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1387fba3bad4STrond Myklebust { 1388fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1389fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1390fba3bad4STrond Myklebust int err; 1391fba3bad4STrond Myklebust 1392fba3bad4STrond Myklebust do { 1393fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1394fba3bad4STrond Myklebust } while (err == -EAGAIN); 1395fba3bad4STrond Myklebust return err; 1396fba3bad4STrond Myklebust } 1397fba3bad4STrond Myklebust 1398a0337d1dSJeff Layton static char * 1399a0337d1dSJeff Layton gss_stringify_acceptor(struct rpc_cred *cred) 1400a0337d1dSJeff Layton { 1401c5e6aecdSJeff Layton char *string = NULL; 1402a0337d1dSJeff Layton struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1403c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1404b3ecba09SJeff Layton unsigned int len; 1405c5e6aecdSJeff Layton struct xdr_netobj *acceptor; 1406c5e6aecdSJeff Layton 1407c5e6aecdSJeff Layton rcu_read_lock(); 1408c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1409c5e6aecdSJeff Layton if (!ctx) 1410c5e6aecdSJeff Layton goto out; 1411c5e6aecdSJeff Layton 1412b3ecba09SJeff Layton len = ctx->gc_acceptor.len; 1413b3ecba09SJeff Layton rcu_read_unlock(); 1414a0337d1dSJeff Layton 1415a0337d1dSJeff Layton /* no point if there's no string */ 1416b3ecba09SJeff Layton if (!len) 1417b3ecba09SJeff Layton return NULL; 1418b3ecba09SJeff Layton realloc: 1419b3ecba09SJeff Layton string = kmalloc(len + 1, GFP_KERNEL); 1420a0337d1dSJeff Layton if (!string) 1421b3ecba09SJeff Layton return NULL; 1422b3ecba09SJeff Layton 1423b3ecba09SJeff Layton rcu_read_lock(); 1424b3ecba09SJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1425b3ecba09SJeff Layton 1426b3ecba09SJeff Layton /* did the ctx disappear or was it replaced by one with no acceptor? */ 1427b3ecba09SJeff Layton if (!ctx || !ctx->gc_acceptor.len) { 1428b3ecba09SJeff Layton kfree(string); 1429b3ecba09SJeff Layton string = NULL; 1430c5e6aecdSJeff Layton goto out; 1431b3ecba09SJeff Layton } 1432b3ecba09SJeff Layton 1433b3ecba09SJeff Layton acceptor = &ctx->gc_acceptor; 1434b3ecba09SJeff Layton 1435b3ecba09SJeff Layton /* 1436b3ecba09SJeff Layton * Did we find a new acceptor that's longer than the original? Allocate 1437b3ecba09SJeff Layton * a longer buffer and try again. 1438b3ecba09SJeff Layton */ 1439b3ecba09SJeff Layton if (len < acceptor->len) { 1440b3ecba09SJeff Layton len = acceptor->len; 1441b3ecba09SJeff Layton rcu_read_unlock(); 1442b3ecba09SJeff Layton kfree(string); 1443b3ecba09SJeff Layton goto realloc; 1444b3ecba09SJeff Layton } 1445a0337d1dSJeff Layton 1446a0337d1dSJeff Layton memcpy(string, acceptor->data, acceptor->len); 1447a0337d1dSJeff Layton string[acceptor->len] = '\0'; 1448c5e6aecdSJeff Layton out: 1449c5e6aecdSJeff Layton rcu_read_unlock(); 1450a0337d1dSJeff Layton return string; 1451a0337d1dSJeff Layton } 1452a0337d1dSJeff Layton 14534de6caa2SAndy Adamson /* 14544de6caa2SAndy Adamson * Returns -EACCES if GSS context is NULL or will expire within the 14554de6caa2SAndy Adamson * timeout (miliseconds) 14564de6caa2SAndy Adamson */ 14574de6caa2SAndy Adamson static int 14584de6caa2SAndy Adamson gss_key_timeout(struct rpc_cred *rc) 14594de6caa2SAndy Adamson { 14604de6caa2SAndy Adamson struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1461c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1462cc6a7aabSArnd Bergmann unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); 1463cc6a7aabSArnd Bergmann int ret = 0; 14644de6caa2SAndy Adamson 1465c5e6aecdSJeff Layton rcu_read_lock(); 1466c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1467cc6a7aabSArnd Bergmann if (!ctx || time_after(timeout, ctx->gc_expiry)) 1468cc6a7aabSArnd Bergmann ret = -EACCES; 1469c5e6aecdSJeff Layton rcu_read_unlock(); 1470cc6a7aabSArnd Bergmann 1471cc6a7aabSArnd Bergmann return ret; 14724de6caa2SAndy Adamson } 14734de6caa2SAndy Adamson 1474fba3bad4STrond Myklebust static int 14758a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 14761da177e4SLinus Torvalds { 14771da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1478c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 14794de6caa2SAndy Adamson int ret; 14801da177e4SLinus Torvalds 1481cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 14828a317760STrond Myklebust goto out; 14831da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1484c5e6aecdSJeff Layton rcu_read_lock(); 1485c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1486c5e6aecdSJeff Layton if (!ctx || time_after(jiffies, ctx->gc_expiry)) { 1487c5e6aecdSJeff Layton rcu_read_unlock(); 1488cd019f75STrond Myklebust return 0; 1489c5e6aecdSJeff Layton } 1490c5e6aecdSJeff Layton rcu_read_unlock(); 1491cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 14921da177e4SLinus Torvalds return 0; 14938a317760STrond Myklebust out: 149468c97153STrond Myklebust if (acred->principal != NULL) { 149568c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 149668c97153STrond Myklebust return 0; 14974de6caa2SAndy Adamson ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; 1498ddf529eeSNeilBrown } else { 149968c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 15007c67db3aSTrond Myklebust return 0; 150104d1532bSNeilBrown ret = uid_eq(rc->cr_cred->fsuid, acred->cred->fsuid); 15024de6caa2SAndy Adamson } 15034de6caa2SAndy Adamson return ret; 15041da177e4SLinus Torvalds } 15051da177e4SLinus Torvalds 15061da177e4SLinus Torvalds /* 15071da177e4SLinus Torvalds * Marshal credentials. 1508e8680a24SChuck Lever * 1509e8680a24SChuck Lever * The expensive part is computing the verifier. We can't cache a 1510e8680a24SChuck Lever * pre-computed version of the verifier because the seqno, which 1511e8680a24SChuck Lever * is different every time, is included in the MIC. 15121da177e4SLinus Torvalds */ 1513e8680a24SChuck Lever static int gss_marshal(struct rpc_task *task, struct xdr_stream *xdr) 15141da177e4SLinus Torvalds { 1515a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1516a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 15171da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15181da177e4SLinus Torvalds gc_base); 15191da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1520e8680a24SChuck Lever __be32 *p, *cred_len; 15211da177e4SLinus Torvalds u32 maj_stat = 0; 15221da177e4SLinus Torvalds struct xdr_netobj mic; 15231da177e4SLinus Torvalds struct kvec iov; 15241da177e4SLinus Torvalds struct xdr_buf verf_buf; 15250c77668dSChuck Lever int status; 15261da177e4SLinus Torvalds 1527e8680a24SChuck Lever /* Credential */ 1528e8680a24SChuck Lever 1529e8680a24SChuck Lever p = xdr_reserve_space(xdr, 7 * sizeof(*p) + 1530e8680a24SChuck Lever ctx->gc_wire_ctx.len); 1531e8680a24SChuck Lever if (!p) 15320c77668dSChuck Lever goto marshal_failed; 1533e8680a24SChuck Lever *p++ = rpc_auth_gss; 15341da177e4SLinus Torvalds cred_len = p++; 15351da177e4SLinus Torvalds 15361da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 153797b78ae9STrond Myklebust req->rq_seqno = (ctx->gc_seq < MAXSEQ) ? ctx->gc_seq++ : MAXSEQ; 15381da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 153997b78ae9STrond Myklebust if (req->rq_seqno == MAXSEQ) 15400c77668dSChuck Lever goto expired; 15410c77668dSChuck Lever trace_rpcgss_seqno(task); 15421da177e4SLinus Torvalds 1543e8680a24SChuck Lever *p++ = cpu_to_be32(RPC_GSS_VERSION); 1544e8680a24SChuck Lever *p++ = cpu_to_be32(ctx->gc_proc); 1545e8680a24SChuck Lever *p++ = cpu_to_be32(req->rq_seqno); 1546e8680a24SChuck Lever *p++ = cpu_to_be32(gss_cred->gc_service); 15471da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 1548e8680a24SChuck Lever *cred_len = cpu_to_be32((p - (cred_len + 1)) << 2); 1549e8680a24SChuck Lever 1550e8680a24SChuck Lever /* Verifier */ 15511da177e4SLinus Torvalds 15521da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 15531da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1554067fb11bSChuck Lever iov.iov_base = req->rq_snd_buf.head[0].iov_base; 15551da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 15561da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 15571da177e4SLinus Torvalds 1558e8680a24SChuck Lever p = xdr_reserve_space(xdr, sizeof(*p)); 1559e8680a24SChuck Lever if (!p) 15600c77668dSChuck Lever goto marshal_failed; 1561e8680a24SChuck Lever *p++ = rpc_auth_gss; 15621da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 156300fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 1564e8680a24SChuck Lever if (maj_stat == GSS_S_CONTEXT_EXPIRED) 15650c77668dSChuck Lever goto expired; 1566e8680a24SChuck Lever else if (maj_stat != 0) 15670c77668dSChuck Lever goto bad_mic; 1568e8680a24SChuck Lever if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) 15690c77668dSChuck Lever goto marshal_failed; 15700c77668dSChuck Lever status = 0; 15710c77668dSChuck Lever out: 15721da177e4SLinus Torvalds gss_put_ctx(ctx); 15730c77668dSChuck Lever return status; 15740c77668dSChuck Lever expired: 157597b78ae9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15760c77668dSChuck Lever status = -EKEYEXPIRED; 15770c77668dSChuck Lever goto out; 15780c77668dSChuck Lever marshal_failed: 15790c77668dSChuck Lever status = -EMSGSIZE; 15800c77668dSChuck Lever goto out; 15810c77668dSChuck Lever bad_mic: 15820c77668dSChuck Lever trace_rpcgss_get_mic(task, maj_stat); 15830c77668dSChuck Lever status = -EIO; 15840c77668dSChuck Lever goto out; 15851da177e4SLinus Torvalds } 15861da177e4SLinus Torvalds 1587cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1588cd019f75STrond Myklebust { 1589a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1590cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1591cd019f75STrond Myklebust struct gss_cred, 1592cd019f75STrond Myklebust gc_base); 1593cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1594cd019f75STrond Myklebust struct auth_cred acred = { 159597f68c6bSNeilBrown .cred = oldcred->cr_cred, 159668c97153STrond Myklebust .principal = gss_cred->gc_principal, 1597cd019f75STrond Myklebust }; 1598cd019f75STrond Myklebust struct rpc_cred *new; 1599cd019f75STrond Myklebust 1600cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1601cd019f75STrond Myklebust if (IS_ERR(new)) 1602cd019f75STrond Myklebust return PTR_ERR(new); 1603a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1604cd019f75STrond Myklebust put_rpccred(oldcred); 1605cd019f75STrond Myklebust return 0; 1606cd019f75STrond Myklebust } 1607cd019f75STrond Myklebust 1608126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1609126e216aSTrond Myklebust { 1610126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1611126e216aSTrond Myklebust unsigned long now = jiffies; 1612126e216aSTrond Myklebust unsigned long begin, expire; 1613126e216aSTrond Myklebust struct gss_cred *gss_cred; 1614126e216aSTrond Myklebust 1615126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1616126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1617126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1618126e216aSTrond Myklebust 1619126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1620126e216aSTrond Myklebust return 1; 1621126e216aSTrond Myklebust } 1622126e216aSTrond Myklebust return 0; 1623126e216aSTrond Myklebust } 1624126e216aSTrond Myklebust 16251da177e4SLinus Torvalds /* 16261da177e4SLinus Torvalds * Refresh credentials. XXX - finish 16271da177e4SLinus Torvalds */ 16281da177e4SLinus Torvalds static int 16291da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 16301da177e4SLinus Torvalds { 1631a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1632cd019f75STrond Myklebust int ret = 0; 16331da177e4SLinus Torvalds 1634126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1635126e216aSTrond Myklebust return -EKEYEXPIRED; 1636126e216aSTrond Myklebust 1637cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1638cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1639cd019f75STrond Myklebust ret = gss_renew_cred(task); 1640cd019f75STrond Myklebust if (ret < 0) 1641cd019f75STrond Myklebust goto out; 1642a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1643cd019f75STrond Myklebust } 1644cd019f75STrond Myklebust 1645cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1646cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1647cd019f75STrond Myklebust out: 1648cd019f75STrond Myklebust return ret; 16491da177e4SLinus Torvalds } 16501da177e4SLinus Torvalds 16510df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 16520df7fb74STrond Myklebust static int 16530df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 16540df7fb74STrond Myklebust { 1655c297c8b9SAndy Adamson return 0; 16560df7fb74STrond Myklebust } 16570df7fb74STrond Myklebust 1658a0584ee9SChuck Lever static int 1659a0584ee9SChuck Lever gss_validate(struct rpc_task *task, struct xdr_stream *xdr) 16601da177e4SLinus Torvalds { 1661a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16621da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1663a0584ee9SChuck Lever __be32 *p, *seq = NULL; 16641da177e4SLinus Torvalds struct kvec iov; 16651da177e4SLinus Torvalds struct xdr_buf verf_buf; 16661da177e4SLinus Torvalds struct xdr_netobj mic; 1667a0584ee9SChuck Lever u32 len, maj_stat; 1668a0584ee9SChuck Lever int status; 16691da177e4SLinus Torvalds 1670a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1671a0584ee9SChuck Lever if (!p) 1672a0584ee9SChuck Lever goto validate_failed; 1673a0584ee9SChuck Lever if (*p++ != rpc_auth_gss) 1674a0584ee9SChuck Lever goto validate_failed; 1675a0584ee9SChuck Lever len = be32_to_cpup(p); 1676a0584ee9SChuck Lever if (len > RPC_MAX_AUTH_SIZE) 1677a0584ee9SChuck Lever goto validate_failed; 1678a0584ee9SChuck Lever p = xdr_inline_decode(xdr, len); 1679a0584ee9SChuck Lever if (!p) 1680a0584ee9SChuck Lever goto validate_failed; 16811da177e4SLinus Torvalds 16822876a344SJ. Bruce Fields seq = kmalloc(4, GFP_NOFS); 16832876a344SJ. Bruce Fields if (!seq) 1684a0584ee9SChuck Lever goto validate_failed; 1685a0584ee9SChuck Lever *seq = cpu_to_be32(task->tk_rqstp->rq_seqno); 16862876a344SJ. Bruce Fields iov.iov_base = seq; 16872876a344SJ. Bruce Fields iov.iov_len = 4; 16881da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 16891da177e4SLinus Torvalds mic.data = (u8 *)p; 16901da177e4SLinus Torvalds mic.len = len; 169100fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 16921da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1693fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1694a0584ee9SChuck Lever if (maj_stat) 1695a0584ee9SChuck Lever goto bad_mic; 1696a0584ee9SChuck Lever 169724b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 169824b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 16991be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 1700a0584ee9SChuck Lever status = 0; 1701a0584ee9SChuck Lever out: 17021da177e4SLinus Torvalds gss_put_ctx(ctx); 17032876a344SJ. Bruce Fields kfree(seq); 1704a0584ee9SChuck Lever return status; 1705a0584ee9SChuck Lever 1706a0584ee9SChuck Lever validate_failed: 1707a0584ee9SChuck Lever status = -EIO; 1708a0584ee9SChuck Lever goto out; 1709a0584ee9SChuck Lever bad_mic: 17100c77668dSChuck Lever trace_rpcgss_verify_mic(task, maj_stat); 1711a0584ee9SChuck Lever status = -EACCES; 1712a0584ee9SChuck Lever goto out; 17131da177e4SLinus Torvalds } 17141da177e4SLinus Torvalds 1715e8680a24SChuck Lever static int gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1716e8680a24SChuck Lever struct rpc_task *task, struct xdr_stream *xdr) 17179f06c719SChuck Lever { 1718e8680a24SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 1719e8680a24SChuck Lever struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf; 17201da177e4SLinus Torvalds struct xdr_netobj mic; 1721e8680a24SChuck Lever __be32 *p, *integ_len; 1722e8680a24SChuck Lever u32 offset, maj_stat; 17231da177e4SLinus Torvalds 1724e8680a24SChuck Lever p = xdr_reserve_space(xdr, 2 * sizeof(*p)); 1725e8680a24SChuck Lever if (!p) 1726e8680a24SChuck Lever goto wrap_failed; 17271da177e4SLinus Torvalds integ_len = p++; 1728e8680a24SChuck Lever *p = cpu_to_be32(rqstp->rq_seqno); 1729e8680a24SChuck Lever 1730e8680a24SChuck Lever if (rpcauth_wrap_req_encode(task, xdr)) 1731e8680a24SChuck Lever goto wrap_failed; 1732e8680a24SChuck Lever 17331da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17341da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 17351da177e4SLinus Torvalds offset, snd_buf->len - offset)) 1736e8680a24SChuck Lever goto wrap_failed; 1737e8680a24SChuck Lever *integ_len = cpu_to_be32(integ_buf.len); 17381da177e4SLinus Torvalds 1739e8680a24SChuck Lever p = xdr_reserve_space(xdr, 0); 1740e8680a24SChuck Lever if (!p) 1741e8680a24SChuck Lever goto wrap_failed; 17421da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 174300fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 17441da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1745fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 17461da177e4SLinus Torvalds else if (maj_stat) 17470c77668dSChuck Lever goto bad_mic; 1748e8680a24SChuck Lever /* Check that the trailing MIC fit in the buffer, after the fact */ 1749e8680a24SChuck Lever if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) 1750e8680a24SChuck Lever goto wrap_failed; 17511da177e4SLinus Torvalds return 0; 1752e8680a24SChuck Lever wrap_failed: 1753e8680a24SChuck Lever return -EMSGSIZE; 17540c77668dSChuck Lever bad_mic: 17550c77668dSChuck Lever trace_rpcgss_get_mic(task, maj_stat); 17560c77668dSChuck Lever return -EIO; 17571da177e4SLinus Torvalds } 17581da177e4SLinus Torvalds 17592d2da60cSJ. Bruce Fields static void 17602d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 17612d2da60cSJ. Bruce Fields { 17622d2da60cSJ. Bruce Fields int i; 17632d2da60cSJ. Bruce Fields 17642d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 17652d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 17662d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 17678dae5398SChuck Lever rqstp->rq_release_snd_buf = NULL; 17682d2da60cSJ. Bruce Fields } 17692d2da60cSJ. Bruce Fields 17702d2da60cSJ. Bruce Fields static int 17712d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 17722d2da60cSJ. Bruce Fields { 17732d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17742d2da60cSJ. Bruce Fields int first, last, i; 17752d2da60cSJ. Bruce Fields 17768dae5398SChuck Lever if (rqstp->rq_release_snd_buf) 17778dae5398SChuck Lever rqstp->rq_release_snd_buf(rqstp); 17788dae5398SChuck Lever 17792d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 17802d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 17812d2da60cSJ. Bruce Fields return 0; 17822d2da60cSJ. Bruce Fields } 17832d2da60cSJ. Bruce Fields 178409cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 178509cbfeafSKirill A. Shutemov last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; 17862d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 17872d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 17886da2ec56SKees Cook = kmalloc_array(rqstp->rq_enc_pages_num, 17896da2ec56SKees Cook sizeof(struct page *), 17902d2da60cSJ. Bruce Fields GFP_NOFS); 17912d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 17922d2da60cSJ. Bruce Fields goto out; 17932d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 17942d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 17952d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 17962d2da60cSJ. Bruce Fields goto out_free; 17972d2da60cSJ. Bruce Fields } 17982d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 17992d2da60cSJ. Bruce Fields return 0; 18002d2da60cSJ. Bruce Fields out_free: 1801cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1802cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 18032d2da60cSJ. Bruce Fields out: 18042d2da60cSJ. Bruce Fields return -EAGAIN; 18052d2da60cSJ. Bruce Fields } 18062d2da60cSJ. Bruce Fields 1807e8680a24SChuck Lever static int gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1808e8680a24SChuck Lever struct rpc_task *task, struct xdr_stream *xdr) 18092d2da60cSJ. Bruce Fields { 1810e8680a24SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 18112d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1812e8680a24SChuck Lever u32 pad, offset, maj_stat; 18132d2da60cSJ. Bruce Fields int status; 1814e8680a24SChuck Lever __be32 *p, *opaque_len; 18152d2da60cSJ. Bruce Fields struct page **inpages; 18162d2da60cSJ. Bruce Fields int first; 18172d2da60cSJ. Bruce Fields struct kvec *iov; 18182d2da60cSJ. Bruce Fields 1819e8680a24SChuck Lever status = -EIO; 1820e8680a24SChuck Lever p = xdr_reserve_space(xdr, 2 * sizeof(*p)); 1821e8680a24SChuck Lever if (!p) 1822e8680a24SChuck Lever goto wrap_failed; 18232d2da60cSJ. Bruce Fields opaque_len = p++; 1824e8680a24SChuck Lever *p = cpu_to_be32(rqstp->rq_seqno); 18252d2da60cSJ. Bruce Fields 1826e8680a24SChuck Lever if (rpcauth_wrap_req_encode(task, xdr)) 1827e8680a24SChuck Lever goto wrap_failed; 18282d2da60cSJ. Bruce Fields 18292d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 1830e8680a24SChuck Lever if (unlikely(status)) 1831e8680a24SChuck Lever goto wrap_failed; 183209cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 18332d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 18342d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 183509cbfeafSKirill A. Shutemov snd_buf->page_base -= first << PAGE_SHIFT; 18367561042fSKevin Coffman /* 1837e8680a24SChuck Lever * Move the tail into its own page, in case gss_wrap needs 1838e8680a24SChuck Lever * more space in the head when wrapping. 18397561042fSKevin Coffman * 1840e8680a24SChuck Lever * Still... Why can't gss_wrap just slide the tail down? 18417561042fSKevin Coffman */ 18422d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 1843e8680a24SChuck Lever char *tmp; 1844e8680a24SChuck Lever 18452d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 18462d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 18472d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 18482d2da60cSJ. Bruce Fields } 1849e8680a24SChuck Lever offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 185000fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 18517561042fSKevin Coffman /* slack space should prevent this ever happening: */ 1852e8680a24SChuck Lever if (unlikely(snd_buf->len > snd_buf->buflen)) 1853e8680a24SChuck Lever goto wrap_failed; 18542d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 18552d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 18562d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1857fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18582d2da60cSJ. Bruce Fields else if (maj_stat) 18590c77668dSChuck Lever goto bad_wrap; 18602d2da60cSJ. Bruce Fields 1861e8680a24SChuck Lever *opaque_len = cpu_to_be32(snd_buf->len - offset); 1862e8680a24SChuck Lever /* guess whether the pad goes into the head or the tail: */ 18632d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 18642d2da60cSJ. Bruce Fields iov = snd_buf->tail; 18652d2da60cSJ. Bruce Fields else 18662d2da60cSJ. Bruce Fields iov = snd_buf->head; 18672d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 18682d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 18692d2da60cSJ. Bruce Fields memset(p, 0, pad); 18702d2da60cSJ. Bruce Fields iov->iov_len += pad; 18712d2da60cSJ. Bruce Fields snd_buf->len += pad; 18722d2da60cSJ. Bruce Fields 18732d2da60cSJ. Bruce Fields return 0; 1874e8680a24SChuck Lever wrap_failed: 1875e8680a24SChuck Lever return status; 18760c77668dSChuck Lever bad_wrap: 18770c77668dSChuck Lever trace_rpcgss_wrap(task, maj_stat); 18780c77668dSChuck Lever return -EIO; 18792d2da60cSJ. Bruce Fields } 18802d2da60cSJ. Bruce Fields 1881e8680a24SChuck Lever static int gss_wrap_req(struct rpc_task *task, struct xdr_stream *xdr) 18821da177e4SLinus Torvalds { 1883a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 18841da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 18851da177e4SLinus Torvalds gc_base); 18861da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1887e8680a24SChuck Lever int status; 18881da177e4SLinus Torvalds 1889e8680a24SChuck Lever status = -EIO; 18901da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 18911da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 18921da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 18931da177e4SLinus Torvalds */ 1894e8680a24SChuck Lever status = rpcauth_wrap_req_encode(task, xdr); 18951da177e4SLinus Torvalds goto out; 18961da177e4SLinus Torvalds } 18971da177e4SLinus Torvalds switch (gss_cred->gc_service) { 18981da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 1899e8680a24SChuck Lever status = rpcauth_wrap_req_encode(task, xdr); 19001da177e4SLinus Torvalds break; 19011da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 1902e8680a24SChuck Lever status = gss_wrap_req_integ(cred, ctx, task, xdr); 19031da177e4SLinus Torvalds break; 19041da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 1905e8680a24SChuck Lever status = gss_wrap_req_priv(cred, ctx, task, xdr); 19061da177e4SLinus Torvalds break; 19070c77668dSChuck Lever default: 19080c77668dSChuck Lever status = -EIO; 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds out: 19111da177e4SLinus Torvalds gss_put_ctx(ctx); 19121da177e4SLinus Torvalds return status; 19131da177e4SLinus Torvalds } 19141da177e4SLinus Torvalds 1915a0584ee9SChuck Lever static int 1916a0584ee9SChuck Lever gss_unwrap_resp_auth(struct rpc_cred *cred) 19171da177e4SLinus Torvalds { 1918a0584ee9SChuck Lever cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize; 1919a0584ee9SChuck Lever return 0; 1920a0584ee9SChuck Lever } 19211da177e4SLinus Torvalds 1922a0584ee9SChuck Lever static int 19230c77668dSChuck Lever gss_unwrap_resp_integ(struct rpc_task *task, struct rpc_cred *cred, 19240c77668dSChuck Lever struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, 19250c77668dSChuck Lever struct xdr_stream *xdr) 1926a0584ee9SChuck Lever { 1927a0584ee9SChuck Lever struct xdr_buf integ_buf, *rcv_buf = &rqstp->rq_rcv_buf; 1928a0584ee9SChuck Lever u32 data_offset, mic_offset, integ_len, maj_stat; 1929a0584ee9SChuck Lever struct xdr_netobj mic; 1930a0584ee9SChuck Lever __be32 *p; 1931a0584ee9SChuck Lever 1932a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1933a0584ee9SChuck Lever if (unlikely(!p)) 1934a0584ee9SChuck Lever goto unwrap_failed; 1935a0584ee9SChuck Lever integ_len = be32_to_cpup(p++); 19361da177e4SLinus Torvalds if (integ_len & 3) 1937a0584ee9SChuck Lever goto unwrap_failed; 1938a0584ee9SChuck Lever data_offset = (u8 *)(p) - (u8 *)rcv_buf->head[0].iov_base; 19391da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 19401da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 1941a0584ee9SChuck Lever goto unwrap_failed; 1942a0584ee9SChuck Lever if (be32_to_cpup(p) != rqstp->rq_seqno) 19430c77668dSChuck Lever goto bad_seqno; 19441da177e4SLinus Torvalds 1945a0584ee9SChuck Lever if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, integ_len)) 1946a0584ee9SChuck Lever goto unwrap_failed; 19471da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 1948a0584ee9SChuck Lever goto unwrap_failed; 194900fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 19501da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1951fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19521da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 1953a0584ee9SChuck Lever goto bad_mic; 1954a0584ee9SChuck Lever 1955a0584ee9SChuck Lever cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + 2 + 1956a0584ee9SChuck Lever 1 + XDR_QUADLEN(mic.len); 19571da177e4SLinus Torvalds return 0; 1958a0584ee9SChuck Lever unwrap_failed: 19590c77668dSChuck Lever trace_rpcgss_unwrap_failed(task); 19600c77668dSChuck Lever return -EIO; 19610c77668dSChuck Lever bad_seqno: 19620c77668dSChuck Lever trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(p)); 1963a0584ee9SChuck Lever return -EIO; 1964a0584ee9SChuck Lever bad_mic: 19650c77668dSChuck Lever trace_rpcgss_verify_mic(task, maj_stat); 1966a0584ee9SChuck Lever return -EIO; 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds 1969a0584ee9SChuck Lever static int 19700c77668dSChuck Lever gss_unwrap_resp_priv(struct rpc_task *task, struct rpc_cred *cred, 19710c77668dSChuck Lever struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, 19720c77668dSChuck Lever struct xdr_stream *xdr) 19732d2da60cSJ. Bruce Fields { 19742d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1975a0584ee9SChuck Lever struct kvec *head = rqstp->rq_rcv_buf.head; 1976a0584ee9SChuck Lever unsigned int savedlen = rcv_buf->len; 1977a0584ee9SChuck Lever u32 offset, opaque_len, maj_stat; 1978a0584ee9SChuck Lever __be32 *p; 19792d2da60cSJ. Bruce Fields 1980a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1981a0584ee9SChuck Lever if (unlikely(!p)) 1982a0584ee9SChuck Lever goto unwrap_failed; 1983a0584ee9SChuck Lever opaque_len = be32_to_cpup(p++); 1984a0584ee9SChuck Lever offset = (u8 *)(p) - (u8 *)head->iov_base; 19852d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 1986a0584ee9SChuck Lever goto unwrap_failed; 19872d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 19882d2da60cSJ. Bruce Fields 198900fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 19902d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1991fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19922d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 1993a0584ee9SChuck Lever goto bad_unwrap; 1994a0584ee9SChuck Lever /* gss_unwrap decrypted the sequence number */ 1995a0584ee9SChuck Lever if (be32_to_cpup(p++) != rqstp->rq_seqno) 19960c77668dSChuck Lever goto bad_seqno; 19972d2da60cSJ. Bruce Fields 1998a0584ee9SChuck Lever /* gss_unwrap redacts the opaque blob from the head iovec. 1999a0584ee9SChuck Lever * rcv_buf has changed, thus the stream needs to be reset. 2000a0584ee9SChuck Lever */ 2001a0584ee9SChuck Lever xdr_init_decode(xdr, rcv_buf, p, rqstp); 2002a0584ee9SChuck Lever 2003a0584ee9SChuck Lever cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + 2 + 2004a0584ee9SChuck Lever XDR_QUADLEN(savedlen - rcv_buf->len); 20052d2da60cSJ. Bruce Fields return 0; 2006a0584ee9SChuck Lever unwrap_failed: 20070c77668dSChuck Lever trace_rpcgss_unwrap_failed(task); 20080c77668dSChuck Lever return -EIO; 20090c77668dSChuck Lever bad_seqno: 20100c77668dSChuck Lever trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(--p)); 2011a0584ee9SChuck Lever return -EIO; 2012a0584ee9SChuck Lever bad_unwrap: 20130c77668dSChuck Lever trace_rpcgss_unwrap(task, maj_stat); 2014a0584ee9SChuck Lever return -EIO; 2015bf269551SChuck Lever } 20162d2da60cSJ. Bruce Fields 20173021a5bbSTrond Myklebust static bool 20183021a5bbSTrond Myklebust gss_seq_is_newer(u32 new, u32 old) 20193021a5bbSTrond Myklebust { 20203021a5bbSTrond Myklebust return (s32)(new - old) > 0; 20213021a5bbSTrond Myklebust } 20223021a5bbSTrond Myklebust 20233021a5bbSTrond Myklebust static bool 20243021a5bbSTrond Myklebust gss_xmit_need_reencode(struct rpc_task *task) 20253021a5bbSTrond Myklebust { 20263021a5bbSTrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 20273021a5bbSTrond Myklebust struct rpc_cred *cred = req->rq_cred; 20283021a5bbSTrond Myklebust struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20290c77668dSChuck Lever u32 win, seq_xmit = 0; 20303021a5bbSTrond Myklebust bool ret = true; 20313021a5bbSTrond Myklebust 20323021a5bbSTrond Myklebust if (!ctx) 20330c77668dSChuck Lever goto out; 20343021a5bbSTrond Myklebust 20353021a5bbSTrond Myklebust if (gss_seq_is_newer(req->rq_seqno, READ_ONCE(ctx->gc_seq))) 20360c77668dSChuck Lever goto out_ctx; 20373021a5bbSTrond Myklebust 20383021a5bbSTrond Myklebust seq_xmit = READ_ONCE(ctx->gc_seq_xmit); 20393021a5bbSTrond Myklebust while (gss_seq_is_newer(req->rq_seqno, seq_xmit)) { 20403021a5bbSTrond Myklebust u32 tmp = seq_xmit; 20413021a5bbSTrond Myklebust 20423021a5bbSTrond Myklebust seq_xmit = cmpxchg(&ctx->gc_seq_xmit, tmp, req->rq_seqno); 20433021a5bbSTrond Myklebust if (seq_xmit == tmp) { 20443021a5bbSTrond Myklebust ret = false; 20450c77668dSChuck Lever goto out_ctx; 20463021a5bbSTrond Myklebust } 20473021a5bbSTrond Myklebust } 20483021a5bbSTrond Myklebust 20493021a5bbSTrond Myklebust win = ctx->gc_win; 20503021a5bbSTrond Myklebust if (win > 0) 20513021a5bbSTrond Myklebust ret = !gss_seq_is_newer(req->rq_seqno, seq_xmit - win); 20520c77668dSChuck Lever 20530c77668dSChuck Lever out_ctx: 20543021a5bbSTrond Myklebust gss_put_ctx(ctx); 20550c77668dSChuck Lever out: 20560c77668dSChuck Lever trace_rpcgss_need_reencode(task, seq_xmit, ret); 20573021a5bbSTrond Myklebust return ret; 20583021a5bbSTrond Myklebust } 20593021a5bbSTrond Myklebust 20601da177e4SLinus Torvalds static int 2061a0584ee9SChuck Lever gss_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr) 20621da177e4SLinus Torvalds { 2063a0584ee9SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 2064a0584ee9SChuck Lever struct rpc_cred *cred = rqstp->rq_cred; 20651da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 20661da177e4SLinus Torvalds gc_base); 20671da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20681da177e4SLinus Torvalds int status = -EIO; 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 20711da177e4SLinus Torvalds goto out_decode; 20721da177e4SLinus Torvalds switch (gss_cred->gc_service) { 20731da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 2074a0584ee9SChuck Lever status = gss_unwrap_resp_auth(cred); 20751da177e4SLinus Torvalds break; 20761da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 20770c77668dSChuck Lever status = gss_unwrap_resp_integ(task, cred, ctx, rqstp, xdr); 20781da177e4SLinus Torvalds break; 20791da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 20800c77668dSChuck Lever status = gss_unwrap_resp_priv(task, cred, ctx, rqstp, xdr); 20811da177e4SLinus Torvalds break; 20821da177e4SLinus Torvalds } 2083a0584ee9SChuck Lever if (status) 2084a0584ee9SChuck Lever goto out; 2085a0584ee9SChuck Lever 20861da177e4SLinus Torvalds out_decode: 2087a0584ee9SChuck Lever status = rpcauth_unwrap_resp_decode(task, xdr); 20881da177e4SLinus Torvalds out: 20891da177e4SLinus Torvalds gss_put_ctx(ctx); 20901da177e4SLinus Torvalds return status; 20911da177e4SLinus Torvalds } 20921da177e4SLinus Torvalds 2093f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 20941da177e4SLinus Torvalds .owner = THIS_MODULE, 20951da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 20961da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 20971da177e4SLinus Torvalds .create = gss_create, 20981da177e4SLinus Torvalds .destroy = gss_destroy, 2099a960f8d6SFrank Sorenson .hash_cred = gss_hash_cred, 21001da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 210180df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 21026a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 21039568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 2104a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 21051da177e4SLinus Torvalds }; 21061da177e4SLinus Torvalds 2107f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 21081da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 21091da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 2110fba3bad4STrond Myklebust .cr_init = gss_cred_init, 21111da177e4SLinus Torvalds .crmatch = gss_match, 21121da177e4SLinus Torvalds .crmarshal = gss_marshal, 21131da177e4SLinus Torvalds .crrefresh = gss_refresh, 21141da177e4SLinus Torvalds .crvalidate = gss_validate, 21151da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 21161da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 21174de6caa2SAndy Adamson .crkey_timeout = gss_key_timeout, 2118a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21193021a5bbSTrond Myklebust .crneed_reencode = gss_xmit_need_reencode, 21201da177e4SLinus Torvalds }; 21211da177e4SLinus Torvalds 21220df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 21230df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 21246dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 21250df7fb74STrond Myklebust .crmatch = gss_match, 21260df7fb74STrond Myklebust .crmarshal = gss_marshal, 21270df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 21280df7fb74STrond Myklebust .crvalidate = gss_validate, 21290df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 21300df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 2131a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21320df7fb74STrond Myklebust }; 21330df7fb74STrond Myklebust 2134b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 2135c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 21361da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 21371da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 213834769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 213934769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 214034769fc4S\"J. Bruce Fields\ }; 214134769fc4S\"J. Bruce Fields\ 2142b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 2143c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 214434769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 214534769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 214634769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 21471da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 21481da177e4SLinus Torvalds }; 21491da177e4SLinus Torvalds 2150a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 2151a1db410dSStanislav Kinsbursky { 2152a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 2153a1db410dSStanislav Kinsbursky } 2154a1db410dSStanislav Kinsbursky 2155a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 2156a1db410dSStanislav Kinsbursky { 2157a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 2158a1db410dSStanislav Kinsbursky } 2159a1db410dSStanislav Kinsbursky 2160a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 2161a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 2162a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 2163a1db410dSStanislav Kinsbursky }; 2164a1db410dSStanislav Kinsbursky 21651da177e4SLinus Torvalds /* 21661da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 21671da177e4SLinus Torvalds */ 21681da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 21691da177e4SLinus Torvalds { 21701da177e4SLinus Torvalds int err = 0; 21711da177e4SLinus Torvalds 21721da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 21731da177e4SLinus Torvalds if (err) 21741da177e4SLinus Torvalds goto out; 21751da177e4SLinus Torvalds err = gss_svc_init(); 21761da177e4SLinus Torvalds if (err) 21771da177e4SLinus Torvalds goto out_unregister; 2178a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 2179a1db410dSStanislav Kinsbursky if (err) 2180a1db410dSStanislav Kinsbursky goto out_svc_exit; 218179a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 21821da177e4SLinus Torvalds return 0; 2183a1db410dSStanislav Kinsbursky out_svc_exit: 2184a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 21851da177e4SLinus Torvalds out_unregister: 21861da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 21871da177e4SLinus Torvalds out: 21881da177e4SLinus Torvalds return err; 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds 21911da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 21921da177e4SLinus Torvalds { 2193a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 21941da177e4SLinus Torvalds gss_svc_shutdown(); 21951da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 2196bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 21971da177e4SLinus Torvalds } 21981da177e4SLinus Torvalds 219971afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 22001da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2201126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 2202126e216aSTrond Myklebust gss_expired_cred_retry_delay, 2203126e216aSTrond Myklebust uint, 0644); 2204126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 2205126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 2206126e216aSTrond Myklebust 22074de6caa2SAndy Adamson module_param_named(key_expire_timeo, 22084de6caa2SAndy Adamson gss_key_expire_timeo, 22094de6caa2SAndy Adamson uint, 0644); 22104de6caa2SAndy Adamson MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " 22114de6caa2SAndy Adamson "credential keys lifetime where the NFS layer cleans up " 22124de6caa2SAndy Adamson "prior to key expiration"); 22134de6caa2SAndy Adamson 22141da177e4SLinus Torvalds module_init(init_rpcsec_gss) 22151da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 2216