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 58f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 591da177e4SLinus Torvalds 60f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 610df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 621da177e4SLinus Torvalds 63126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 64126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 65126e216aSTrond Myklebust 664de6caa2SAndy Adamson #define GSS_KEY_EXPIRE_TIMEO 240 674de6caa2SAndy Adamson static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; 684de6caa2SAndy Adamson 69f895b252SJeff Layton #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) 701da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 711da177e4SLinus Torvalds #endif 721da177e4SLinus Torvalds 73725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 741da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 751da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 76adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 771da177e4SLinus Torvalds 7823c323afSTrond Myklebust static DEFINE_HASHTABLE(gss_auth_hash_table, 4); 79eb6dc19dSTrond Myklebust static DEFINE_SPINLOCK(gss_auth_hash_lock); 80eb6dc19dSTrond Myklebust 8119172284STrond Myklebust struct gss_pipe { 8219172284STrond Myklebust struct rpc_pipe_dir_object pdo; 8319172284STrond Myklebust struct rpc_pipe *pipe; 8419172284STrond Myklebust struct rpc_clnt *clnt; 8519172284STrond Myklebust const char *name; 86414a6295STrond Myklebust struct kref kref; 8719172284STrond Myklebust }; 8819172284STrond Myklebust 891da177e4SLinus Torvalds struct gss_auth { 900285ed1fSTrond Myklebust struct kref kref; 91eb6dc19dSTrond Myklebust struct hlist_node hash; 921da177e4SLinus Torvalds struct rpc_auth rpc_auth; 931da177e4SLinus Torvalds struct gss_api_mech *mech; 941da177e4SLinus Torvalds enum rpc_gss_svc service; 951da177e4SLinus Torvalds struct rpc_clnt *client; 96e726340aSTrond Myklebust struct net *net; 9734769fc4S\"J. Bruce Fields\ /* 9834769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 9934769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 10034769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 10134769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 10234769fc4S\"J. Bruce Fields\ */ 10319172284STrond Myklebust struct gss_pipe *gss_pipe[2]; 104bd4a3eb1STrond Myklebust const char *target_name; 1051da177e4SLinus Torvalds }; 1061da177e4SLinus Torvalds 10779a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 10879a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 10979a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 11079a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 1119eb2ddb4STrond Myklebust static void gss_put_auth(struct gss_auth *gss_auth); 112cf81939dS\"J. Bruce Fields\ 1135d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 114b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 115b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1181da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1191da177e4SLinus Torvalds { 1200fa10472SReshetova, Elena refcount_inc(&ctx->count); 1211da177e4SLinus Torvalds return ctx; 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static inline void 1251da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1261da177e4SLinus Torvalds { 1270fa10472SReshetova, Elena if (refcount_dec_and_test(&ctx->count)) 1285d28dc82STrond Myklebust gss_free_ctx(ctx); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1315d28dc82STrond Myklebust /* gss_cred_set_ctx: 1325d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1335d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1349beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1355d28dc82STrond Myklebust */ 1361da177e4SLinus Torvalds static void 1371da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1381da177e4SLinus Torvalds { 1391da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1405d28dc82STrond Myklebust 141cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 142cd019f75STrond Myklebust return; 1437b6962b0STrond Myklebust gss_get_ctx(ctx); 144cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 145fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1464e857c58SPeter Zijlstra smp_mb__before_atomic(); 147fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static const void * 1511da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1541da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1551da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1561da177e4SLinus Torvalds memcpy(res, p, len); 1571da177e4SLinus Torvalds return q; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static inline const void * 1611da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds const void *q; 1641da177e4SLinus Torvalds unsigned int len; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1671da177e4SLinus Torvalds if (IS_ERR(p)) 1681da177e4SLinus Torvalds return p; 1691da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1701da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1711da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1720f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1731da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1741da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1751da177e4SLinus Torvalds dest->len = len; 1761da177e4SLinus Torvalds return q; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static struct gss_cl_ctx * 1801da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1831da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1841da177e4SLinus Torvalds 1855d28dc82STrond Myklebust rcu_read_lock(); 186c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 187c5e6aecdSJeff Layton if (ctx) 188c5e6aecdSJeff Layton gss_get_ctx(ctx); 1895d28dc82STrond Myklebust rcu_read_unlock(); 1901da177e4SLinus Torvalds return ctx; 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds static struct gss_cl_ctx * 1941da177e4SLinus Torvalds gss_alloc_context(void) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1971da177e4SLinus Torvalds 1980f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1991da177e4SLinus Torvalds if (ctx != NULL) { 2001da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 2011da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 2021da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 2030fa10472SReshetova, Elena refcount_set(&ctx->count,1); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return ctx; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 2091da177e4SLinus Torvalds static const void * 2101da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds const void *q; 2131da177e4SLinus Torvalds unsigned int seclen; 2141da177e4SLinus Torvalds unsigned int timeout; 215620038f6SAndy Adamson unsigned long now = jiffies; 2161da177e4SLinus Torvalds u32 window_size; 2171da177e4SLinus Torvalds int ret; 2181da177e4SLinus Torvalds 219620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 220620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 221620038f6SAndy Adamson * the -t value passed to GSSD. 222620038f6SAndy Adamson */ 2231da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2241da177e4SLinus Torvalds if (IS_ERR(p)) 2251da177e4SLinus Torvalds goto err; 2261da177e4SLinus Torvalds if (timeout == 0) 2271da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 228620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 229620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 230620038f6SAndy Adamson * simultaneous requests 231620038f6SAndy Adamson */ 2321da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2331da177e4SLinus Torvalds if (IS_ERR(p)) 2341da177e4SLinus Torvalds goto err; 2351da177e4SLinus Torvalds ctx->gc_win = window_size; 2361da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2371da177e4SLinus Torvalds if (ctx->gc_win == 0) { 238dc5ddce9SJeff Layton /* 239dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 240dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 241dc5ddce9SJeff Layton */ 242dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 243dc5ddce9SJeff Layton if (!IS_ERR(p)) 244dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 245dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2461da177e4SLinus Torvalds goto err; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds /* copy the opaque wire context */ 2491da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2501da177e4SLinus Torvalds if (IS_ERR(p)) 2511da177e4SLinus Torvalds goto err; 2521da177e4SLinus Torvalds /* import the opaque security context */ 2531da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2541da177e4SLinus Torvalds if (IS_ERR(p)) 2551da177e4SLinus Torvalds goto err; 2561da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2571da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2581da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2591da177e4SLinus Torvalds goto err; 2601da177e4SLinus Torvalds } 261400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2621da177e4SLinus Torvalds if (ret < 0) { 2631da177e4SLinus Torvalds p = ERR_PTR(ret); 2641da177e4SLinus Torvalds goto err; 2651da177e4SLinus Torvalds } 2662004c726SJeff Layton 2672004c726SJeff Layton /* is there any trailing data? */ 2682004c726SJeff Layton if (q == end) { 2692004c726SJeff Layton p = q; 2702004c726SJeff Layton goto done; 2712004c726SJeff Layton } 2722004c726SJeff Layton 2732004c726SJeff Layton /* pull in acceptor name (if there is one) */ 2742004c726SJeff Layton p = simple_get_netobj(q, end, &ctx->gc_acceptor); 2752004c726SJeff Layton if (IS_ERR(p)) 2762004c726SJeff Layton goto err; 2772004c726SJeff Layton done: 2782004c726SJeff Layton dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u acceptor %.*s\n", 2792004c726SJeff Layton __func__, ctx->gc_expiry, now, timeout, ctx->gc_acceptor.len, 2802004c726SJeff Layton ctx->gc_acceptor.data); 2812004c726SJeff Layton return p; 2821da177e4SLinus Torvalds err: 283173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2841da177e4SLinus Torvalds return p; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 28734769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds struct gss_upcall_msg { 2901da177e4SLinus Torvalds atomic_t count; 2917eaf040bSEric W. Biederman kuid_t uid; 2921da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2931da177e4SLinus Torvalds struct list_head list; 2941da177e4SLinus Torvalds struct gss_auth *auth; 2959beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2961da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2971da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2981da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 29934769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 3001da177e4SLinus Torvalds }; 3011da177e4SLinus Torvalds 3022aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 30379a3f20bS\"J. Bruce Fields\ { 3042aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 30579a3f20bS\"J. Bruce Fields\ int ret; 30679a3f20bS\"J. Bruce Fields\ 30779a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 3082aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 3092aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 3102aed8b47STrond Myklebust ret = sn->pipe_version; 31179a3f20bS\"J. Bruce Fields\ } else 31279a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 31379a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 31479a3f20bS\"J. Bruce Fields\ return ret; 31579a3f20bS\"J. Bruce Fields\ } 31679a3f20bS\"J. Bruce Fields\ 3172aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 31879a3f20bS\"J. Bruce Fields\ { 3192aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 3202aed8b47STrond Myklebust 3212aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 3222aed8b47STrond Myklebust sn->pipe_version = -1; 32379a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 32479a3f20bS\"J. Bruce Fields\ } 32579a3f20bS\"J. Bruce Fields\ } 32679a3f20bS\"J. Bruce Fields\ 3271da177e4SLinus Torvalds static void 3281da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 3291da177e4SLinus Torvalds { 330e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3311da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 3321da177e4SLinus Torvalds return; 3332aed8b47STrond Myklebust put_pipe_version(net); 3341da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3351da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3361da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 337f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3389eb2ddb4STrond Myklebust gss_put_auth(gss_msg->auth); 3391da177e4SLinus Torvalds kfree(gss_msg); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds static struct gss_upcall_msg * 3439130b8dbSOlga Kornievskaia __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth) 3441da177e4SLinus Torvalds { 3451da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3469beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3470b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3481da177e4SLinus Torvalds continue; 3499130b8dbSOlga Kornievskaia if (auth && pos->auth->service != auth->service) 3509130b8dbSOlga Kornievskaia continue; 3511da177e4SLinus Torvalds atomic_inc(&pos->count); 352632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3531da177e4SLinus Torvalds return pos; 3541da177e4SLinus Torvalds } 355632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3561da177e4SLinus Torvalds return NULL; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 359720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3601da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3611da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3621da177e4SLinus Torvalds */ 3631da177e4SLinus Torvalds static inline struct gss_upcall_msg * 364053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3651da177e4SLinus Torvalds { 3669beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3671da177e4SLinus Torvalds struct gss_upcall_msg *old; 3681da177e4SLinus Torvalds 3699beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3709130b8dbSOlga Kornievskaia old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth); 3711da177e4SLinus Torvalds if (old == NULL) { 3721da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3739beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3741da177e4SLinus Torvalds } else 3751da177e4SLinus Torvalds gss_msg = old; 3769beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3771da177e4SLinus Torvalds return gss_msg; 3781da177e4SLinus Torvalds } 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds static void 3811da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3821da177e4SLinus Torvalds { 3831da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3841da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3851da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3861da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds static void 3901da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3911da177e4SLinus Torvalds { 3929beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3931da177e4SLinus Torvalds 3943b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3953b68aaeaSTrond Myklebust return; 3969beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3973b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3981da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3999beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds static void 403126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 404126e216aSTrond Myklebust { 405126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 406126e216aSTrond Myklebust case 0: 407126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 408126e216aSTrond Myklebust break; 409126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 410126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 411126e216aSTrond Myklebust break; 412126e216aSTrond Myklebust case -EKEYEXPIRED: 413126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 414126e216aSTrond Myklebust } 415126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 416126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 417126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 418126e216aSTrond Myklebust } 419126e216aSTrond Myklebust 420126e216aSTrond Myklebust static void 4211da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 4221da177e4SLinus Torvalds { 423a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 4241da177e4SLinus Torvalds struct gss_cred, gc_base); 4251da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 4269beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 4271da177e4SLinus Torvalds 4289beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 429126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 4309beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 431126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 4321da177e4SLinus Torvalds gss_release_msg(gss_msg); 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds 43534769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 43634769fc4S\"J. Bruce Fields\ { 43790602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 43890602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 43990602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 44090602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 4419d3a2260STrond Myklebust 4429d3a2260STrond Myklebust BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); 44334769fc4S\"J. Bruce Fields\ } 44434769fc4S\"J. Bruce Fields\ 4459d3a2260STrond Myklebust static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 446bd4a3eb1STrond Myklebust const char *service_name, 447bd4a3eb1STrond Myklebust const char *target_name) 44834769fc4S\"J. Bruce Fields\ { 449683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4508b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4519d3a2260STrond Myklebust size_t buflen = sizeof(gss_msg->databuf); 4529d3a2260STrond Myklebust int len; 4538b1c7bf5SOlga Kornievskaia 4549d3a2260STrond Myklebust len = scnprintf(p, buflen, "mech=%s uid=%d ", mech->gm_name, 45590602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4569d3a2260STrond Myklebust buflen -= len; 4579d3a2260STrond Myklebust p += len; 4589d3a2260STrond Myklebust gss_msg->msg.len = len; 459bd4a3eb1STrond Myklebust if (target_name) { 4609d3a2260STrond Myklebust len = scnprintf(p, buflen, "target=%s ", target_name); 4619d3a2260STrond Myklebust buflen -= len; 4628b1c7bf5SOlga Kornievskaia p += len; 4638b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4648b1c7bf5SOlga Kornievskaia } 46568c97153STrond Myklebust if (service_name != NULL) { 4669d3a2260STrond Myklebust len = scnprintf(p, buflen, "service=%s ", service_name); 4679d3a2260STrond Myklebust buflen -= len; 4682efef708SOlga Kornievskaia p += len; 4692efef708SOlga Kornievskaia gss_msg->msg.len += len; 4702efef708SOlga Kornievskaia } 471683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 4729d3a2260STrond Myklebust len = scnprintf(p, buflen, "enctypes=%s ", 4739d3a2260STrond Myklebust mech->gm_upcall_enctypes); 4749d3a2260STrond Myklebust buflen -= len; 475683ac665STrond Myklebust p += len; 476683ac665STrond Myklebust gss_msg->msg.len += len; 477683ac665STrond Myklebust } 4789d3a2260STrond Myklebust len = scnprintf(p, buflen, "\n"); 4799d3a2260STrond Myklebust if (len == 0) 4809d3a2260STrond Myklebust goto out_overflow; 4818b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4828b1c7bf5SOlga Kornievskaia 48334769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 4849d3a2260STrond Myklebust return 0; 4859d3a2260STrond Myklebust out_overflow: 4869d3a2260STrond Myklebust WARN_ON_ONCE(1); 4879d3a2260STrond Myklebust return -ENOMEM; 48834769fc4S\"J. Bruce Fields\ } 48934769fc4S\"J. Bruce Fields\ 49068c97153STrond Myklebust static struct gss_upcall_msg * 491e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 4927eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4931da177e4SLinus Torvalds { 4941da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 49579a3f20bS\"J. Bruce Fields\ int vers; 4969d3a2260STrond Myklebust int err = -ENOMEM; 4971da177e4SLinus Torvalds 4980f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 499db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 5009d3a2260STrond Myklebust goto err; 501e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 5029d3a2260STrond Myklebust err = vers; 5039d3a2260STrond Myklebust if (err < 0) 5049d3a2260STrond Myklebust goto err_free_msg; 50519172284STrond Myklebust gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; 5061da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 5071da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 5081da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 5091da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 5101da177e4SLinus Torvalds gss_msg->uid = uid; 5111da177e4SLinus Torvalds gss_msg->auth = gss_auth; 512bd4a3eb1STrond Myklebust switch (vers) { 513bd4a3eb1STrond Myklebust case 0: 514bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 5155fccc5b5STrond Myklebust break; 516bd4a3eb1STrond Myklebust default: 5179d3a2260STrond Myklebust err = gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 5189d3a2260STrond Myklebust if (err) 519e9776d0fSTrond Myklebust goto err_put_pipe_version; 520bd4a3eb1STrond Myklebust }; 5219eb2ddb4STrond Myklebust kref_get(&gss_auth->kref); 5221da177e4SLinus Torvalds return gss_msg; 523e9776d0fSTrond Myklebust err_put_pipe_version: 524e9776d0fSTrond Myklebust put_pipe_version(gss_auth->net); 5259d3a2260STrond Myklebust err_free_msg: 5269d3a2260STrond Myklebust kfree(gss_msg); 5279d3a2260STrond Myklebust err: 5289d3a2260STrond Myklebust return ERR_PTR(err); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds static struct gss_upcall_msg * 532e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 5331da177e4SLinus Torvalds { 5347c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 5357c67db3aSTrond Myklebust struct gss_cred, gc_base); 5361da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 5377eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 5381da177e4SLinus Torvalds 539e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 540db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 541db75b3d6S\"J. Bruce Fields\ return gss_new; 542053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 5431da177e4SLinus Torvalds if (gss_msg == gss_new) { 5441cded9d2SNeilBrown int res; 5451cded9d2SNeilBrown atomic_inc(&gss_msg->count); 5461cded9d2SNeilBrown res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 5471da177e4SLinus Torvalds if (res) { 5481da177e4SLinus Torvalds gss_unhash_msg(gss_new); 5491cded9d2SNeilBrown atomic_dec(&gss_msg->count); 5501cded9d2SNeilBrown gss_release_msg(gss_new); 5511da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds } else 5541da177e4SLinus Torvalds gss_release_msg(gss_new); 5551da177e4SLinus Torvalds return gss_msg; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds 558b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 559b03568c3S\"J. Bruce Fields\ { 5600ea9de0eSJeff Layton dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); 561b03568c3S\"J. Bruce Fields\ } 562b03568c3S\"J. Bruce Fields\ 5631da177e4SLinus Torvalds static inline int 5641da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5651da177e4SLinus Torvalds { 566a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5674a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5681da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5691da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5701da177e4SLinus Torvalds struct gss_cred, gc_base); 5711da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5729beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5731da177e4SLinus Torvalds int err = 0; 5741da177e4SLinus Torvalds 575632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 576cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 577e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 578480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 57979a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 58079a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 58179a3f20bS\"J. Bruce Fields\ warn_gssd(); 58279a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 58379a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 584d1a8016aSBryan Schumaker return -EAGAIN; 58579a3f20bS\"J. Bruce Fields\ } 5861da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5871da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5881da177e4SLinus Torvalds goto out; 5891da177e4SLinus Torvalds } 5909beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5919beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5921da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5935d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 594126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5951da177e4SLinus Torvalds task->tk_timeout = 0; 5961da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5971da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5981da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5995d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 600126e216aSTrond Myklebust } else { 601126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 6021da177e4SLinus Torvalds err = gss_msg->msg.errno; 603126e216aSTrond Myklebust } 6049beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6051da177e4SLinus Torvalds gss_release_msg(gss_msg); 6061da177e4SLinus Torvalds out: 607632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 608cdba321eSEric W. Biederman task->tk_pid, __func__, 609cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 6101da177e4SLinus Torvalds return err; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds static inline int 6141da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 6151da177e4SLinus Torvalds { 616e726340aSTrond Myklebust struct net *net = gss_auth->net; 617abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 6189beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6191da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 6201da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6211da177e4SLinus Torvalds DEFINE_WAIT(wait); 622d36ccb9cSTrond Myklebust int err; 6231da177e4SLinus Torvalds 624cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 625cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 62679a3f20bS\"J. Bruce Fields\ retry: 627d36ccb9cSTrond Myklebust err = 0; 62889f84243SJeff Layton /* if gssd is down, just skip upcalling altogether */ 62989f84243SJeff Layton if (!gssd_running(net)) { 63089f84243SJeff Layton warn_gssd(); 63189f84243SJeff Layton return -EACCES; 63289f84243SJeff Layton } 633e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 63479a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 63579a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 63689f84243SJeff Layton sn->pipe_version >= 0, 15 * HZ); 6372aed8b47STrond Myklebust if (sn->pipe_version < 0) { 638d1a8016aSBryan Schumaker warn_gssd(); 639d1a8016aSBryan Schumaker err = -EACCES; 640d1a8016aSBryan Schumaker } 641d36ccb9cSTrond Myklebust if (err < 0) 64279a3f20bS\"J. Bruce Fields\ goto out; 64379a3f20bS\"J. Bruce Fields\ goto retry; 64479a3f20bS\"J. Bruce Fields\ } 6451da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6461da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6471da177e4SLinus Torvalds goto out; 6481da177e4SLinus Torvalds } 6499beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6501da177e4SLinus Torvalds for (;;) { 6515afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6529beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6531da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6541da177e4SLinus Torvalds break; 6551da177e4SLinus Torvalds } 6569beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6575afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6581da177e4SLinus Torvalds err = -ERESTARTSYS; 6591da177e4SLinus Torvalds goto out_intr; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds schedule(); 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds if (gss_msg->ctx) 6647b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6651da177e4SLinus Torvalds else 6661da177e4SLinus Torvalds err = gss_msg->msg.errno; 6679beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6681da177e4SLinus Torvalds out_intr: 6691da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6701da177e4SLinus Torvalds gss_release_msg(gss_msg); 6711da177e4SLinus Torvalds out: 672632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 673cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6741da177e4SLinus Torvalds return err; 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds static ssize_t 6801da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds const void *p, *end; 6831da177e4SLinus Torvalds void *buf; 6841da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 685496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6861da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 68790602c7bSEric W. Biederman uid_t id; 68890602c7bSEric W. Biederman kuid_t uid; 6893b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6921da177e4SLinus Torvalds goto out; 6931da177e4SLinus Torvalds err = -ENOMEM; 6940f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6951da177e4SLinus Torvalds if (!buf) 6961da177e4SLinus Torvalds goto out; 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds err = -EFAULT; 6991da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 7001da177e4SLinus Torvalds goto err; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 70390602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 7041da177e4SLinus Torvalds if (IS_ERR(p)) { 7051da177e4SLinus Torvalds err = PTR_ERR(p); 7061da177e4SLinus Torvalds goto err; 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds 70990602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 71090602c7bSEric W. Biederman if (!uid_valid(uid)) { 71190602c7bSEric W. Biederman err = -EINVAL; 71290602c7bSEric W. Biederman goto err; 71390602c7bSEric W. Biederman } 71490602c7bSEric W. Biederman 7151da177e4SLinus Torvalds err = -ENOMEM; 7161da177e4SLinus Torvalds ctx = gss_alloc_context(); 7171da177e4SLinus Torvalds if (ctx == NULL) 7181da177e4SLinus Torvalds goto err; 7193b68aaeaSTrond Myklebust 7203b68aaeaSTrond Myklebust err = -ENOENT; 7213b68aaeaSTrond Myklebust /* Find a matching upcall */ 7229beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7239130b8dbSOlga Kornievskaia gss_msg = __gss_find_upcall(pipe, uid, NULL); 7243b68aaeaSTrond Myklebust if (gss_msg == NULL) { 7259beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7263b68aaeaSTrond Myklebust goto err_put_ctx; 7273b68aaeaSTrond Myklebust } 7283b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 7299beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7303b68aaeaSTrond Myklebust 7316e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 7321da177e4SLinus Torvalds if (IS_ERR(p)) { 7331da177e4SLinus Torvalds err = PTR_ERR(p); 734486bad2eSJeff Layton switch (err) { 735486bad2eSJeff Layton case -EACCES: 736dc5ddce9SJeff Layton case -EKEYEXPIRED: 737486bad2eSJeff Layton gss_msg->msg.errno = err; 738486bad2eSJeff Layton err = mlen; 739486bad2eSJeff Layton break; 740486bad2eSJeff Layton case -EFAULT: 741486bad2eSJeff Layton case -ENOMEM: 742486bad2eSJeff Layton case -EINVAL: 743486bad2eSJeff Layton case -ENOSYS: 744486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 745486bad2eSJeff Layton break; 746486bad2eSJeff Layton default: 747486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7486c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 749437b300cSScott Mayhew gss_msg->msg.errno = -EIO; 750486bad2eSJeff Layton } 7513b68aaeaSTrond Myklebust goto err_release_msg; 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7543b68aaeaSTrond Myklebust err = mlen; 7553b68aaeaSTrond Myklebust 7563b68aaeaSTrond Myklebust err_release_msg: 7579beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7581da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7599beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7601da177e4SLinus Torvalds gss_release_msg(gss_msg); 7611da177e4SLinus Torvalds err_put_ctx: 7621da177e4SLinus Torvalds gss_put_ctx(ctx); 7631da177e4SLinus Torvalds err: 7641da177e4SLinus Torvalds kfree(buf); 7651da177e4SLinus Torvalds out: 7665b5e0928SAlexey Dobriyan dprintk("RPC: %s returning %zd\n", __func__, err); 7671da177e4SLinus Torvalds return err; 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 77034769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 771cf81939dS\"J. Bruce Fields\ { 7722aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7732aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 77434769fc4S\"J. Bruce Fields\ int ret = 0; 77534769fc4S\"J. Bruce Fields\ 77679a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 7772aed8b47STrond Myklebust if (sn->pipe_version < 0) { 77834769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 7792aed8b47STrond Myklebust sn->pipe_version = new_version; 78079a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 78179a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 7822aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 78334769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 78434769fc4S\"J. Bruce Fields\ ret = -EBUSY; 78534769fc4S\"J. Bruce Fields\ goto out; 78679a3f20bS\"J. Bruce Fields\ } 7872aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 78834769fc4S\"J. Bruce Fields\ out: 78979a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 79034769fc4S\"J. Bruce Fields\ return ret; 79134769fc4S\"J. Bruce Fields\ 79234769fc4S\"J. Bruce Fields\ } 79334769fc4S\"J. Bruce Fields\ 79434769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 79534769fc4S\"J. Bruce Fields\ { 79634769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 79734769fc4S\"J. Bruce Fields\ } 79834769fc4S\"J. Bruce Fields\ 79934769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 80034769fc4S\"J. Bruce Fields\ { 80134769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 802cf81939dS\"J. Bruce Fields\ } 803cf81939dS\"J. Bruce Fields\ 8041da177e4SLinus Torvalds static void 8051da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 8061da177e4SLinus Torvalds { 8072aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8089beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 8091da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 8101da177e4SLinus Torvalds 8115a67657aSTrond Myklebust restart: 8129beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 8139beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 8146e84c7b6STrond Myklebust 8155a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 8165a67657aSTrond Myklebust continue; 8171da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 8181da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 8191da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 8209beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 8211da177e4SLinus Torvalds gss_release_msg(gss_msg); 8225a67657aSTrond Myklebust goto restart; 8231da177e4SLinus Torvalds } 8249beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 825cf81939dS\"J. Bruce Fields\ 8262aed8b47STrond Myklebust put_pipe_version(net); 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds static void 8301da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 8311da177e4SLinus Torvalds { 8321da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds if (msg->errno < 0) { 835632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 836632f0d05SChuck Lever __func__, gss_msg); 8371da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 8381da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 839b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 840b03568c3S\"J. Bruce Fields\ warn_gssd(); 8411da177e4SLinus Torvalds gss_release_msg(gss_msg); 8421da177e4SLinus Torvalds } 8431cded9d2SNeilBrown gss_release_msg(gss_msg); 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 84619172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 84719172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 848ccdc28f8SStanislav Kinsbursky { 84919172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 85019172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 851ccdc28f8SStanislav Kinsbursky 85219172284STrond Myklebust if (pipe->dentry != NULL) { 85319172284STrond Myklebust rpc_unlink(pipe->dentry); 85419172284STrond Myklebust pipe->dentry = NULL; 8556b2fddd3STrond Myklebust } 856ccdc28f8SStanislav Kinsbursky } 857ccdc28f8SStanislav Kinsbursky 85819172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 85919172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 860ccdc28f8SStanislav Kinsbursky { 86119172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8626b2fddd3STrond Myklebust struct dentry *dentry; 863ccdc28f8SStanislav Kinsbursky 86419172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 86519172284STrond Myklebust if (IS_ERR(dentry)) 86619172284STrond Myklebust return PTR_ERR(dentry); 86719172284STrond Myklebust p->pipe->dentry = dentry; 868ccdc28f8SStanislav Kinsbursky return 0; 86919172284STrond Myklebust } 870ccdc28f8SStanislav Kinsbursky 87119172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 87219172284STrond Myklebust .create = gss_pipe_dentry_create, 87319172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 87419172284STrond Myklebust }; 87519172284STrond Myklebust 87619172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 87719172284STrond Myklebust const char *name, 87819172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 87919172284STrond Myklebust { 88019172284STrond Myklebust struct gss_pipe *p; 88119172284STrond Myklebust int err = -ENOMEM; 88219172284STrond Myklebust 88319172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 88419172284STrond Myklebust if (p == NULL) 88519172284STrond Myklebust goto err; 88619172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 88719172284STrond Myklebust if (IS_ERR(p->pipe)) { 88819172284STrond Myklebust err = PTR_ERR(p->pipe); 88919172284STrond Myklebust goto err_free_gss_pipe; 89019172284STrond Myklebust } 89119172284STrond Myklebust p->name = name; 89219172284STrond Myklebust p->clnt = clnt; 893414a6295STrond Myklebust kref_init(&p->kref); 89419172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 89519172284STrond Myklebust &gss_pipe_dir_object_ops, 89619172284STrond Myklebust p); 89719172284STrond Myklebust return p; 89819172284STrond Myklebust err_free_gss_pipe: 89919172284STrond Myklebust kfree(p); 9006b2fddd3STrond Myklebust err: 90119172284STrond Myklebust return ERR_PTR(err); 902ccdc28f8SStanislav Kinsbursky } 903ccdc28f8SStanislav Kinsbursky 904414a6295STrond Myklebust struct gss_alloc_pdo { 905414a6295STrond Myklebust struct rpc_clnt *clnt; 906414a6295STrond Myklebust const char *name; 907414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops; 908414a6295STrond Myklebust }; 909414a6295STrond Myklebust 910414a6295STrond Myklebust static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) 911414a6295STrond Myklebust { 912414a6295STrond Myklebust struct gss_pipe *gss_pipe; 913414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 914414a6295STrond Myklebust 915414a6295STrond Myklebust if (pdo->pdo_ops != &gss_pipe_dir_object_ops) 916414a6295STrond Myklebust return 0; 917414a6295STrond Myklebust gss_pipe = container_of(pdo, struct gss_pipe, pdo); 918414a6295STrond Myklebust if (strcmp(gss_pipe->name, args->name) != 0) 919414a6295STrond Myklebust return 0; 920414a6295STrond Myklebust if (!kref_get_unless_zero(&gss_pipe->kref)) 921414a6295STrond Myklebust return 0; 922414a6295STrond Myklebust return 1; 923414a6295STrond Myklebust } 924414a6295STrond Myklebust 925414a6295STrond Myklebust static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) 926414a6295STrond Myklebust { 927414a6295STrond Myklebust struct gss_pipe *gss_pipe; 928414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 929414a6295STrond Myklebust 930414a6295STrond Myklebust gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); 931414a6295STrond Myklebust if (!IS_ERR(gss_pipe)) 932414a6295STrond Myklebust return &gss_pipe->pdo; 933414a6295STrond Myklebust return NULL; 934414a6295STrond Myklebust } 935414a6295STrond Myklebust 936414a6295STrond Myklebust static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, 937414a6295STrond Myklebust const char *name, 938414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 939414a6295STrond Myklebust { 940414a6295STrond Myklebust struct net *net = rpc_net_ns(clnt); 941414a6295STrond Myklebust struct rpc_pipe_dir_object *pdo; 942414a6295STrond Myklebust struct gss_alloc_pdo args = { 943414a6295STrond Myklebust .clnt = clnt, 944414a6295STrond Myklebust .name = name, 945414a6295STrond Myklebust .upcall_ops = upcall_ops, 946414a6295STrond Myklebust }; 947414a6295STrond Myklebust 948414a6295STrond Myklebust pdo = rpc_find_or_alloc_pipe_dir_object(net, 949414a6295STrond Myklebust &clnt->cl_pipedir_objects, 950414a6295STrond Myklebust gss_pipe_match_pdo, 951414a6295STrond Myklebust gss_pipe_alloc_pdo, 952414a6295STrond Myklebust &args); 953414a6295STrond Myklebust if (pdo != NULL) 954414a6295STrond Myklebust return container_of(pdo, struct gss_pipe, pdo); 955414a6295STrond Myklebust return ERR_PTR(-ENOMEM); 956414a6295STrond Myklebust } 957414a6295STrond Myklebust 95819172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 959ccdc28f8SStanislav Kinsbursky { 96019172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 96119172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 962ccdc28f8SStanislav Kinsbursky 96319172284STrond Myklebust rpc_remove_pipe_dir_object(net, 96419172284STrond Myklebust &clnt->cl_pipedir_objects, 96519172284STrond Myklebust &p->pdo); 96619172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 96719172284STrond Myklebust kfree(p); 968ccdc28f8SStanislav Kinsbursky } 969ccdc28f8SStanislav Kinsbursky 970414a6295STrond Myklebust static void __gss_pipe_release(struct kref *kref) 971414a6295STrond Myklebust { 972414a6295STrond Myklebust struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); 973414a6295STrond Myklebust 974414a6295STrond Myklebust __gss_pipe_free(p); 975414a6295STrond Myklebust } 976414a6295STrond Myklebust 97719172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 978ccdc28f8SStanislav Kinsbursky { 97919172284STrond Myklebust if (p != NULL) 980414a6295STrond Myklebust kref_put(&p->kref, __gss_pipe_release); 981ccdc28f8SStanislav Kinsbursky } 982ccdc28f8SStanislav Kinsbursky 9831da177e4SLinus Torvalds /* 9841da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 9851da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 9861da177e4SLinus Torvalds */ 987eb6dc19dSTrond Myklebust static struct gss_auth * 988eb6dc19dSTrond Myklebust gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 9891da177e4SLinus Torvalds { 990c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 9911da177e4SLinus Torvalds struct gss_auth *gss_auth; 99219172284STrond Myklebust struct gss_pipe *gss_pipe; 9931da177e4SLinus Torvalds struct rpc_auth * auth; 9946a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 9996a19275aSJ. Bruce Fields return ERR_PTR(err); 10001da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 10011da177e4SLinus Torvalds goto out_dec; 1002eb6dc19dSTrond Myklebust INIT_HLIST_NODE(&gss_auth->hash); 1003bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 1004c2190661STrond Myklebust if (args->target_name) { 1005c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 1006bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 1007bd4a3eb1STrond Myklebust goto err_free; 1008bd4a3eb1STrond Myklebust } 10091da177e4SLinus Torvalds gss_auth->client = clnt; 1010e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 10116a19275aSJ. Bruce Fields err = -EINVAL; 10121da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 10131da177e4SLinus Torvalds if (!gss_auth->mech) { 10149b1d75b7STrond Myklebust dprintk("RPC: Pseudoflavor %d not found!\n", flavor); 1015e726340aSTrond Myklebust goto err_put_net; 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 1018438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 1019438b6fdeSJ. Bruce Fields goto err_put_mech; 1020a699d65eSTrond Myklebust if (!gssd_running(gss_auth->net)) 1021a699d65eSTrond Myklebust goto err_put_mech; 10221da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 10231da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 10241da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 1025ce52914eSScott Mayhew auth->au_flags = 0; 10261da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 10271da177e4SLinus Torvalds auth->au_flavor = flavor; 102865b80179SChuck Lever if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor)) 102965b80179SChuck Lever auth->au_flags |= RPCAUTH_AUTH_DATATOUCH; 10301da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 10310285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 10321da177e4SLinus Torvalds 103319172284STrond Myklebust err = rpcauth_init_credcache(auth); 103419172284STrond Myklebust if (err) 103519172284STrond Myklebust goto err_put_mech; 103634769fc4S\"J. Bruce Fields\ /* 103734769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 103834769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 103934769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 104034769fc4S\"J. Bruce Fields\ * the new pipe first. 104134769fc4S\"J. Bruce Fields\ */ 1042414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); 104319172284STrond Myklebust if (IS_ERR(gss_pipe)) { 104419172284STrond Myklebust err = PTR_ERR(gss_pipe); 104519172284STrond Myklebust goto err_destroy_credcache; 10466a19275aSJ. Bruce Fields } 104719172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 10481da177e4SLinus Torvalds 1049414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, 105019172284STrond Myklebust &gss_upcall_ops_v0); 105119172284STrond Myklebust if (IS_ERR(gss_pipe)) { 105219172284STrond Myklebust err = PTR_ERR(gss_pipe); 1053c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 1054c239d83bSStanislav Kinsbursky } 105519172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 105607a2bf1dSTrond Myklebust 1057eb6dc19dSTrond Myklebust return gss_auth; 1058c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 1059414a6295STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 106019172284STrond Myklebust err_destroy_credcache: 106119172284STrond Myklebust rpcauth_destroy_credcache(auth); 10621da177e4SLinus Torvalds err_put_mech: 10631da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 1064e726340aSTrond Myklebust err_put_net: 1065e726340aSTrond Myklebust put_net(gss_auth->net); 10661da177e4SLinus Torvalds err_free: 1067bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10681da177e4SLinus Torvalds kfree(gss_auth); 10691da177e4SLinus Torvalds out_dec: 10701da177e4SLinus Torvalds module_put(THIS_MODULE); 10716a19275aSJ. Bruce Fields return ERR_PTR(err); 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds static void 10750285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 10760285ed1fSTrond Myklebust { 107719172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 107819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 10790285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 1080e726340aSTrond Myklebust put_net(gss_auth->net); 1081bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10820285ed1fSTrond Myklebust 10830285ed1fSTrond Myklebust kfree(gss_auth); 10840285ed1fSTrond Myklebust module_put(THIS_MODULE); 10850285ed1fSTrond Myklebust } 10860285ed1fSTrond Myklebust 10870285ed1fSTrond Myklebust static void 10880285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 10890285ed1fSTrond Myklebust { 10900285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 10910285ed1fSTrond Myklebust 10920285ed1fSTrond Myklebust gss_free(gss_auth); 10930285ed1fSTrond Myklebust } 10940285ed1fSTrond Myklebust 10950285ed1fSTrond Myklebust static void 10969eb2ddb4STrond Myklebust gss_put_auth(struct gss_auth *gss_auth) 10979eb2ddb4STrond Myklebust { 10989eb2ddb4STrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10999eb2ddb4STrond Myklebust } 11009eb2ddb4STrond Myklebust 11019eb2ddb4STrond Myklebust static void 11021da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 11031da177e4SLinus Torvalds { 110419172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 110519172284STrond Myklebust struct gss_auth, rpc_auth); 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 11081da177e4SLinus Torvalds auth, auth->au_flavor); 11091da177e4SLinus Torvalds 1110eb6dc19dSTrond Myklebust if (hash_hashed(&gss_auth->hash)) { 1111eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1112eb6dc19dSTrond Myklebust hash_del(&gss_auth->hash); 1113eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1114eb6dc19dSTrond Myklebust } 1115eb6dc19dSTrond Myklebust 111619172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 111719172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 111819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 111919172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 11203ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 11213ab9bb72STrond Myklebust 11229eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 11231da177e4SLinus Torvalds } 11241da177e4SLinus Torvalds 1125a0f6ed8eSJ. Bruce Fields /* 1126a0f6ed8eSJ. Bruce Fields * Auths may be shared between rpc clients that were cloned from a 1127a0f6ed8eSJ. Bruce Fields * common client with the same xprt, if they also share the flavor and 1128a0f6ed8eSJ. Bruce Fields * target_name. 1129a0f6ed8eSJ. Bruce Fields * 1130a0f6ed8eSJ. Bruce Fields * The auth is looked up from the oldest parent sharing the same 1131a0f6ed8eSJ. Bruce Fields * cl_xprt, and the auth itself references only that common parent 1132a0f6ed8eSJ. Bruce Fields * (which is guaranteed to last as long as any of its descendants). 1133a0f6ed8eSJ. Bruce Fields */ 1134eb6dc19dSTrond Myklebust static struct gss_auth * 1135eb6dc19dSTrond Myklebust gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, 1136eb6dc19dSTrond Myklebust struct rpc_clnt *clnt, 1137eb6dc19dSTrond Myklebust struct gss_auth *new) 1138eb6dc19dSTrond Myklebust { 1139eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1140eb6dc19dSTrond Myklebust unsigned long hashval = (unsigned long)clnt; 1141eb6dc19dSTrond Myklebust 1142eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1143eb6dc19dSTrond Myklebust hash_for_each_possible(gss_auth_hash_table, 1144eb6dc19dSTrond Myklebust gss_auth, 1145eb6dc19dSTrond Myklebust hash, 1146eb6dc19dSTrond Myklebust hashval) { 1147a0f6ed8eSJ. Bruce Fields if (gss_auth->client != clnt) 1148a0f6ed8eSJ. Bruce Fields continue; 1149eb6dc19dSTrond Myklebust if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) 1150eb6dc19dSTrond Myklebust continue; 1151eb6dc19dSTrond Myklebust if (gss_auth->target_name != args->target_name) { 1152eb6dc19dSTrond Myklebust if (gss_auth->target_name == NULL) 1153eb6dc19dSTrond Myklebust continue; 1154eb6dc19dSTrond Myklebust if (args->target_name == NULL) 1155eb6dc19dSTrond Myklebust continue; 1156eb6dc19dSTrond Myklebust if (strcmp(gss_auth->target_name, args->target_name)) 1157eb6dc19dSTrond Myklebust continue; 1158eb6dc19dSTrond Myklebust } 1159eb6dc19dSTrond Myklebust if (!atomic_inc_not_zero(&gss_auth->rpc_auth.au_count)) 1160eb6dc19dSTrond Myklebust continue; 1161eb6dc19dSTrond Myklebust goto out; 1162eb6dc19dSTrond Myklebust } 1163eb6dc19dSTrond Myklebust if (new) 1164eb6dc19dSTrond Myklebust hash_add(gss_auth_hash_table, &new->hash, hashval); 1165eb6dc19dSTrond Myklebust gss_auth = new; 1166eb6dc19dSTrond Myklebust out: 1167eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1168eb6dc19dSTrond Myklebust return gss_auth; 1169eb6dc19dSTrond Myklebust } 1170eb6dc19dSTrond Myklebust 1171eb6dc19dSTrond Myklebust static struct gss_auth * 1172eb6dc19dSTrond Myklebust gss_create_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1173eb6dc19dSTrond Myklebust { 1174eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1175eb6dc19dSTrond Myklebust struct gss_auth *new; 1176eb6dc19dSTrond Myklebust 1177eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); 1178eb6dc19dSTrond Myklebust if (gss_auth != NULL) 1179eb6dc19dSTrond Myklebust goto out; 1180eb6dc19dSTrond Myklebust new = gss_create_new(args, clnt); 1181eb6dc19dSTrond Myklebust if (IS_ERR(new)) 1182eb6dc19dSTrond Myklebust return new; 1183eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); 1184eb6dc19dSTrond Myklebust if (gss_auth != new) 1185eb6dc19dSTrond Myklebust gss_destroy(&new->rpc_auth); 1186eb6dc19dSTrond Myklebust out: 1187eb6dc19dSTrond Myklebust return gss_auth; 1188eb6dc19dSTrond Myklebust } 1189eb6dc19dSTrond Myklebust 1190eb6dc19dSTrond Myklebust static struct rpc_auth * 1191eb6dc19dSTrond Myklebust gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1192eb6dc19dSTrond Myklebust { 1193eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1194ad01b2c6STrond Myklebust struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); 1195eb6dc19dSTrond Myklebust 1196eb6dc19dSTrond Myklebust while (clnt != clnt->cl_parent) { 1197eb6dc19dSTrond Myklebust struct rpc_clnt *parent = clnt->cl_parent; 1198eb6dc19dSTrond Myklebust /* Find the original parent for this transport */ 1199ad01b2c6STrond Myklebust if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) 1200eb6dc19dSTrond Myklebust break; 1201eb6dc19dSTrond Myklebust clnt = parent; 1202eb6dc19dSTrond Myklebust } 1203eb6dc19dSTrond Myklebust 1204eb6dc19dSTrond Myklebust gss_auth = gss_create_hashed(args, clnt); 1205eb6dc19dSTrond Myklebust if (IS_ERR(gss_auth)) 1206eb6dc19dSTrond Myklebust return ERR_CAST(gss_auth); 1207eb6dc19dSTrond Myklebust return &gss_auth->rpc_auth; 1208eb6dc19dSTrond Myklebust } 1209eb6dc19dSTrond Myklebust 12100df7fb74STrond Myklebust /* 12110df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 12120df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 12130df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 12140df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 12150df7fb74STrond Myklebust */ 12160df7fb74STrond Myklebust static int 12170df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 12180df7fb74STrond Myklebust { 12190df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12200df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1221c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 12220df7fb74STrond Myklebust struct rpc_task *task; 12230df7fb74STrond Myklebust 1224c5e6aecdSJeff Layton if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 12250df7fb74STrond Myklebust return 0; 12260df7fb74STrond Myklebust 1227c5e6aecdSJeff Layton ctx->gc_proc = RPC_GSS_PROC_DESTROY; 12280df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 12290df7fb74STrond Myklebust 12300df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 12310df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 12320df7fb74STrond Myklebust get_rpccred(cred); 12330df7fb74STrond Myklebust 1234080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 12350df7fb74STrond Myklebust if (!IS_ERR(task)) 12360df7fb74STrond Myklebust rpc_put_task(task); 12370df7fb74STrond Myklebust 12380df7fb74STrond Myklebust put_rpccred(cred); 12390df7fb74STrond Myklebust return 1; 12400df7fb74STrond Myklebust } 12410df7fb74STrond Myklebust 12420df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 12431da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 12441da177e4SLinus Torvalds * allocated before freeing them. */ 12451da177e4SLinus Torvalds static void 12465d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 12471da177e4SLinus Torvalds { 1248632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 12491da177e4SLinus Torvalds 12500d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 12511da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 12522004c726SJeff Layton kfree(ctx->gc_acceptor.data); 12531da177e4SLinus Torvalds kfree(ctx); 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds static void 12575d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 12585d28dc82STrond Myklebust { 12595d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 12605d28dc82STrond Myklebust gss_do_free_ctx(ctx); 12615d28dc82STrond Myklebust } 12625d28dc82STrond Myklebust 12635d28dc82STrond Myklebust static void 12645d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 12655d28dc82STrond Myklebust { 12665d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 12675d28dc82STrond Myklebust } 12685d28dc82STrond Myklebust 12695d28dc82STrond Myklebust static void 127031be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 12711da177e4SLinus Torvalds { 1272632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 127331be5bf1STrond Myklebust kfree(gss_cred); 127431be5bf1STrond Myklebust } 12751da177e4SLinus Torvalds 127631be5bf1STrond Myklebust static void 127731be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 127831be5bf1STrond Myklebust { 127931be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 128031be5bf1STrond Myklebust gss_free_cred(gss_cred); 128131be5bf1STrond Myklebust } 12821da177e4SLinus Torvalds 128331be5bf1STrond Myklebust static void 12846dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 128531be5bf1STrond Myklebust { 12865d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12870285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1288c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 12895d28dc82STrond Myklebust 1290a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 129131be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 12925d28dc82STrond Myklebust if (ctx) 12935d28dc82STrond Myklebust gss_put_ctx(ctx); 12949eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds 12976dcd3926SJeff Layton static void 12986dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 12996dcd3926SJeff Layton { 13006dcd3926SJeff Layton 13016dcd3926SJeff Layton if (gss_destroying_context(cred)) 13026dcd3926SJeff Layton return; 13036dcd3926SJeff Layton gss_destroy_nullcred(cred); 13046dcd3926SJeff Layton } 13056dcd3926SJeff Layton 1306a960f8d6SFrank Sorenson static int 1307a960f8d6SFrank Sorenson gss_hash_cred(struct auth_cred *acred, unsigned int hashbits) 1308a960f8d6SFrank Sorenson { 1309a960f8d6SFrank Sorenson return hash_64(from_kuid(&init_user_ns, acred->uid), hashbits); 1310a960f8d6SFrank Sorenson } 1311a960f8d6SFrank Sorenson 13121da177e4SLinus Torvalds /* 13131da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 13141da177e4SLinus Torvalds */ 13151da177e4SLinus Torvalds static struct rpc_cred * 13168a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 13171da177e4SLinus Torvalds { 13183c6e0bc8SJeff Layton return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); 13191da177e4SLinus Torvalds } 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds static struct rpc_cred * 13223c6e0bc8SJeff Layton gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) 13231da177e4SLinus Torvalds { 13241da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 13251da177e4SLinus Torvalds struct gss_cred *cred = NULL; 13261da177e4SLinus Torvalds int err = -ENOMEM; 13271da177e4SLinus Torvalds 1328632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1329cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1330cdba321eSEric W. Biederman auth->au_flavor); 13311da177e4SLinus Torvalds 13323c6e0bc8SJeff Layton if (!(cred = kzalloc(sizeof(*cred), gfp))) 13331da177e4SLinus Torvalds goto out_err; 13341da177e4SLinus Torvalds 13355fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 13361da177e4SLinus Torvalds /* 13371da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 13381da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 13391da177e4SLinus Torvalds */ 1340fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 13411da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 134268c97153STrond Myklebust cred->gc_principal = NULL; 134368c97153STrond Myklebust if (acred->machine_cred) 134468c97153STrond Myklebust cred->gc_principal = acred->principal; 13450285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 13461da177e4SLinus Torvalds return &cred->gc_base; 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds out_err: 1349632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 13501da177e4SLinus Torvalds return ERR_PTR(err); 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds static int 1354fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1355fba3bad4STrond Myklebust { 1356fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1357fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1358fba3bad4STrond Myklebust int err; 1359fba3bad4STrond Myklebust 1360fba3bad4STrond Myklebust do { 1361fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1362fba3bad4STrond Myklebust } while (err == -EAGAIN); 1363fba3bad4STrond Myklebust return err; 1364fba3bad4STrond Myklebust } 1365fba3bad4STrond Myklebust 1366a0337d1dSJeff Layton static char * 1367a0337d1dSJeff Layton gss_stringify_acceptor(struct rpc_cred *cred) 1368a0337d1dSJeff Layton { 1369c5e6aecdSJeff Layton char *string = NULL; 1370a0337d1dSJeff Layton struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1371c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1372b3ecba09SJeff Layton unsigned int len; 1373c5e6aecdSJeff Layton struct xdr_netobj *acceptor; 1374c5e6aecdSJeff Layton 1375c5e6aecdSJeff Layton rcu_read_lock(); 1376c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1377c5e6aecdSJeff Layton if (!ctx) 1378c5e6aecdSJeff Layton goto out; 1379c5e6aecdSJeff Layton 1380b3ecba09SJeff Layton len = ctx->gc_acceptor.len; 1381b3ecba09SJeff Layton rcu_read_unlock(); 1382a0337d1dSJeff Layton 1383a0337d1dSJeff Layton /* no point if there's no string */ 1384b3ecba09SJeff Layton if (!len) 1385b3ecba09SJeff Layton return NULL; 1386b3ecba09SJeff Layton realloc: 1387b3ecba09SJeff Layton string = kmalloc(len + 1, GFP_KERNEL); 1388a0337d1dSJeff Layton if (!string) 1389b3ecba09SJeff Layton return NULL; 1390b3ecba09SJeff Layton 1391b3ecba09SJeff Layton rcu_read_lock(); 1392b3ecba09SJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1393b3ecba09SJeff Layton 1394b3ecba09SJeff Layton /* did the ctx disappear or was it replaced by one with no acceptor? */ 1395b3ecba09SJeff Layton if (!ctx || !ctx->gc_acceptor.len) { 1396b3ecba09SJeff Layton kfree(string); 1397b3ecba09SJeff Layton string = NULL; 1398c5e6aecdSJeff Layton goto out; 1399b3ecba09SJeff Layton } 1400b3ecba09SJeff Layton 1401b3ecba09SJeff Layton acceptor = &ctx->gc_acceptor; 1402b3ecba09SJeff Layton 1403b3ecba09SJeff Layton /* 1404b3ecba09SJeff Layton * Did we find a new acceptor that's longer than the original? Allocate 1405b3ecba09SJeff Layton * a longer buffer and try again. 1406b3ecba09SJeff Layton */ 1407b3ecba09SJeff Layton if (len < acceptor->len) { 1408b3ecba09SJeff Layton len = acceptor->len; 1409b3ecba09SJeff Layton rcu_read_unlock(); 1410b3ecba09SJeff Layton kfree(string); 1411b3ecba09SJeff Layton goto realloc; 1412b3ecba09SJeff Layton } 1413a0337d1dSJeff Layton 1414a0337d1dSJeff Layton memcpy(string, acceptor->data, acceptor->len); 1415a0337d1dSJeff Layton string[acceptor->len] = '\0'; 1416c5e6aecdSJeff Layton out: 1417c5e6aecdSJeff Layton rcu_read_unlock(); 1418a0337d1dSJeff Layton return string; 1419a0337d1dSJeff Layton } 1420a0337d1dSJeff Layton 14214de6caa2SAndy Adamson /* 14224de6caa2SAndy Adamson * Returns -EACCES if GSS context is NULL or will expire within the 14234de6caa2SAndy Adamson * timeout (miliseconds) 14244de6caa2SAndy Adamson */ 14254de6caa2SAndy Adamson static int 14264de6caa2SAndy Adamson gss_key_timeout(struct rpc_cred *rc) 14274de6caa2SAndy Adamson { 14284de6caa2SAndy Adamson struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1429c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1430cc6a7aabSArnd Bergmann unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); 1431cc6a7aabSArnd Bergmann int ret = 0; 14324de6caa2SAndy Adamson 1433c5e6aecdSJeff Layton rcu_read_lock(); 1434c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1435cc6a7aabSArnd Bergmann if (!ctx || time_after(timeout, ctx->gc_expiry)) 1436cc6a7aabSArnd Bergmann ret = -EACCES; 1437c5e6aecdSJeff Layton rcu_read_unlock(); 1438cc6a7aabSArnd Bergmann 1439cc6a7aabSArnd Bergmann return ret; 14404de6caa2SAndy Adamson } 14414de6caa2SAndy Adamson 1442fba3bad4STrond Myklebust static int 14438a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 14441da177e4SLinus Torvalds { 14451da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1446c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 14474de6caa2SAndy Adamson int ret; 14481da177e4SLinus Torvalds 1449cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 14508a317760STrond Myklebust goto out; 14511da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1452c5e6aecdSJeff Layton rcu_read_lock(); 1453c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1454c5e6aecdSJeff Layton if (!ctx || time_after(jiffies, ctx->gc_expiry)) { 1455c5e6aecdSJeff Layton rcu_read_unlock(); 1456cd019f75STrond Myklebust return 0; 1457c5e6aecdSJeff Layton } 1458c5e6aecdSJeff Layton rcu_read_unlock(); 1459cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 14601da177e4SLinus Torvalds return 0; 14618a317760STrond Myklebust out: 146268c97153STrond Myklebust if (acred->principal != NULL) { 146368c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 146468c97153STrond Myklebust return 0; 14654de6caa2SAndy Adamson ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; 14664de6caa2SAndy Adamson goto check_expire; 146768c97153STrond Myklebust } 146868c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 14697c67db3aSTrond Myklebust return 0; 14704de6caa2SAndy Adamson ret = uid_eq(rc->cr_uid, acred->uid); 14714de6caa2SAndy Adamson 14724de6caa2SAndy Adamson check_expire: 14734de6caa2SAndy Adamson if (ret == 0) 14744de6caa2SAndy Adamson return ret; 14754de6caa2SAndy Adamson 14764de6caa2SAndy Adamson /* Notify acred users of GSS context expiration timeout */ 14774de6caa2SAndy Adamson if (test_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags) && 14784de6caa2SAndy Adamson (gss_key_timeout(rc) != 0)) { 14794de6caa2SAndy Adamson /* test will now be done from generic cred */ 14804de6caa2SAndy Adamson test_and_clear_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags); 14814de6caa2SAndy Adamson /* tell NFS layer that key will expire soon */ 14824de6caa2SAndy Adamson set_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags); 14834de6caa2SAndy Adamson } 14844de6caa2SAndy Adamson return ret; 14851da177e4SLinus Torvalds } 14861da177e4SLinus Torvalds 14871da177e4SLinus Torvalds /* 14881da177e4SLinus Torvalds * Marshal credentials. 14891da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 14901da177e4SLinus Torvalds */ 1491d8ed029dSAlexey Dobriyan static __be32 * 1492d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 14931da177e4SLinus Torvalds { 1494a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1495a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 14961da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 14971da177e4SLinus Torvalds gc_base); 14981da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1499d8ed029dSAlexey Dobriyan __be32 *cred_len; 15001da177e4SLinus Torvalds u32 maj_stat = 0; 15011da177e4SLinus Torvalds struct xdr_netobj mic; 15021da177e4SLinus Torvalds struct kvec iov; 15031da177e4SLinus Torvalds struct xdr_buf verf_buf; 15041da177e4SLinus Torvalds 1505632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 15081da177e4SLinus Torvalds cred_len = p++; 15091da177e4SLinus Torvalds 15101da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 15111da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 15121da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 15151da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 15161da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 15171da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 15181da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 15191da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 15221da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1523a4f0835cSTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1524808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 15251da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 15261da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 15271da177e4SLinus Torvalds 15281da177e4SLinus Torvalds /* set verifier flavor*/ 15291da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 15301da177e4SLinus Torvalds 15311da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 153200fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 15331da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1534fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15351da177e4SLinus Torvalds } else if (maj_stat != 0) { 15361da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 15371da177e4SLinus Torvalds goto out_put_ctx; 15381da177e4SLinus Torvalds } 15391da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 15401da177e4SLinus Torvalds gss_put_ctx(ctx); 15411da177e4SLinus Torvalds return p; 15421da177e4SLinus Torvalds out_put_ctx: 15431da177e4SLinus Torvalds gss_put_ctx(ctx); 15441da177e4SLinus Torvalds return NULL; 15451da177e4SLinus Torvalds } 15461da177e4SLinus Torvalds 1547cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1548cd019f75STrond Myklebust { 1549a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1550cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1551cd019f75STrond Myklebust struct gss_cred, 1552cd019f75STrond Myklebust gc_base); 1553cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1554cd019f75STrond Myklebust struct auth_cred acred = { 1555cd019f75STrond Myklebust .uid = oldcred->cr_uid, 155668c97153STrond Myklebust .principal = gss_cred->gc_principal, 155768c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1558cd019f75STrond Myklebust }; 1559cd019f75STrond Myklebust struct rpc_cred *new; 1560cd019f75STrond Myklebust 1561cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1562cd019f75STrond Myklebust if (IS_ERR(new)) 1563cd019f75STrond Myklebust return PTR_ERR(new); 1564a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1565cd019f75STrond Myklebust put_rpccred(oldcred); 1566cd019f75STrond Myklebust return 0; 1567cd019f75STrond Myklebust } 1568cd019f75STrond Myklebust 1569126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1570126e216aSTrond Myklebust { 1571126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1572126e216aSTrond Myklebust unsigned long now = jiffies; 1573126e216aSTrond Myklebust unsigned long begin, expire; 1574126e216aSTrond Myklebust struct gss_cred *gss_cred; 1575126e216aSTrond Myklebust 1576126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1577126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1578126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1579126e216aSTrond Myklebust 1580126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1581126e216aSTrond Myklebust return 1; 1582126e216aSTrond Myklebust } 1583126e216aSTrond Myklebust return 0; 1584126e216aSTrond Myklebust } 1585126e216aSTrond Myklebust 15861da177e4SLinus Torvalds /* 15871da177e4SLinus Torvalds * Refresh credentials. XXX - finish 15881da177e4SLinus Torvalds */ 15891da177e4SLinus Torvalds static int 15901da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 15911da177e4SLinus Torvalds { 1592a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1593cd019f75STrond Myklebust int ret = 0; 15941da177e4SLinus Torvalds 1595126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1596126e216aSTrond Myklebust return -EKEYEXPIRED; 1597126e216aSTrond Myklebust 1598cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1599cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1600cd019f75STrond Myklebust ret = gss_renew_cred(task); 1601cd019f75STrond Myklebust if (ret < 0) 1602cd019f75STrond Myklebust goto out; 1603a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1604cd019f75STrond Myklebust } 1605cd019f75STrond Myklebust 1606cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1607cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1608cd019f75STrond Myklebust out: 1609cd019f75STrond Myklebust return ret; 16101da177e4SLinus Torvalds } 16111da177e4SLinus Torvalds 16120df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 16130df7fb74STrond Myklebust static int 16140df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 16150df7fb74STrond Myklebust { 1616c297c8b9SAndy Adamson return 0; 16170df7fb74STrond Myklebust } 16180df7fb74STrond Myklebust 1619d8ed029dSAlexey Dobriyan static __be32 * 1620d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 16211da177e4SLinus Torvalds { 1622a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16231da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 16242876a344SJ. Bruce Fields __be32 *seq = NULL; 16251da177e4SLinus Torvalds struct kvec iov; 16261da177e4SLinus Torvalds struct xdr_buf verf_buf; 16271da177e4SLinus Torvalds struct xdr_netobj mic; 16281da177e4SLinus Torvalds u32 flav,len; 16291da177e4SLinus Torvalds u32 maj_stat; 163035fa5f7bSAndy Adamson __be32 *ret = ERR_PTR(-EIO); 16311da177e4SLinus Torvalds 1632632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 16331da177e4SLinus Torvalds 16341da177e4SLinus Torvalds flav = ntohl(*p++); 16351da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 16361da177e4SLinus Torvalds goto out_bad; 16371da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 16381da177e4SLinus Torvalds goto out_bad; 16392876a344SJ. Bruce Fields seq = kmalloc(4, GFP_NOFS); 16402876a344SJ. Bruce Fields if (!seq) 16412876a344SJ. Bruce Fields goto out_bad; 16422876a344SJ. Bruce Fields *seq = htonl(task->tk_rqstp->rq_seqno); 16432876a344SJ. Bruce Fields iov.iov_base = seq; 16442876a344SJ. Bruce Fields iov.iov_len = 4; 16451da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 16461da177e4SLinus Torvalds mic.data = (u8 *)p; 16471da177e4SLinus Torvalds mic.len = len; 16481da177e4SLinus Torvalds 164935fa5f7bSAndy Adamson ret = ERR_PTR(-EACCES); 165000fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 16511da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1652fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 16530df7fb74STrond Myklebust if (maj_stat) { 1654632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1655632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 16561da177e4SLinus Torvalds goto out_bad; 16570df7fb74STrond Myklebust } 165824b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 165924b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 16601be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 16611da177e4SLinus Torvalds gss_put_ctx(ctx); 1662632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1663632f0d05SChuck Lever task->tk_pid, __func__); 16642876a344SJ. Bruce Fields kfree(seq); 16651da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 16661da177e4SLinus Torvalds out_bad: 16671da177e4SLinus Torvalds gss_put_ctx(ctx); 166835fa5f7bSAndy Adamson dprintk("RPC: %5u %s failed ret %ld.\n", task->tk_pid, __func__, 166935fa5f7bSAndy Adamson PTR_ERR(ret)); 16702876a344SJ. Bruce Fields kfree(seq); 167135fa5f7bSAndy Adamson return ret; 16721da177e4SLinus Torvalds } 16731da177e4SLinus Torvalds 16749f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 16759f06c719SChuck Lever __be32 *p, void *obj) 16769f06c719SChuck Lever { 16779f06c719SChuck Lever struct xdr_stream xdr; 16789f06c719SChuck Lever 16799f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 16809f06c719SChuck Lever encode(rqstp, &xdr, obj); 16819f06c719SChuck Lever } 16829f06c719SChuck Lever 16831da177e4SLinus Torvalds static inline int 16841da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 16859f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 16869f06c719SChuck Lever __be32 *p, void *obj) 16871da177e4SLinus Torvalds { 16881da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 16891da177e4SLinus Torvalds struct xdr_buf integ_buf; 1690d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 16911da177e4SLinus Torvalds struct xdr_netobj mic; 1692d8ed029dSAlexey Dobriyan u32 offset; 1693d8ed029dSAlexey Dobriyan __be32 *q; 16941da177e4SLinus Torvalds struct kvec *iov; 16951da177e4SLinus Torvalds u32 maj_stat = 0; 16961da177e4SLinus Torvalds int status = -EIO; 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds integ_len = p++; 16991da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17001da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 17011da177e4SLinus Torvalds 17029f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 17031da177e4SLinus Torvalds 17041da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 17051da177e4SLinus Torvalds offset, snd_buf->len - offset)) 17061da177e4SLinus Torvalds return status; 17071da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 17081da177e4SLinus Torvalds 17091da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 17101da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 17111da177e4SLinus Torvalds iov = snd_buf->tail; 17121da177e4SLinus Torvalds else 17131da177e4SLinus Torvalds iov = snd_buf->head; 17141da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 17151da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 17161da177e4SLinus Torvalds 171700fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 17181da177e4SLinus Torvalds status = -EIO; /* XXX? */ 17191da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1720fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 17211da177e4SLinus Torvalds else if (maj_stat) 17221da177e4SLinus Torvalds return status; 17231da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 17241da177e4SLinus Torvalds 17251da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 17261da177e4SLinus Torvalds iov->iov_len += offset; 17271da177e4SLinus Torvalds snd_buf->len += offset; 17281da177e4SLinus Torvalds return 0; 17291da177e4SLinus Torvalds } 17301da177e4SLinus Torvalds 17312d2da60cSJ. Bruce Fields static void 17322d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 17332d2da60cSJ. Bruce Fields { 17342d2da60cSJ. Bruce Fields int i; 17352d2da60cSJ. Bruce Fields 17362d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 17372d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 17382d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 17392d2da60cSJ. Bruce Fields } 17402d2da60cSJ. Bruce Fields 17412d2da60cSJ. Bruce Fields static int 17422d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 17432d2da60cSJ. Bruce Fields { 17442d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17452d2da60cSJ. Bruce Fields int first, last, i; 17462d2da60cSJ. Bruce Fields 17472d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 17482d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 17492d2da60cSJ. Bruce Fields return 0; 17502d2da60cSJ. Bruce Fields } 17512d2da60cSJ. Bruce Fields 175209cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 175309cbfeafSKirill A. Shutemov last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; 17542d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 17552d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 17562d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 17572d2da60cSJ. Bruce Fields GFP_NOFS); 17582d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 17592d2da60cSJ. Bruce Fields goto out; 17602d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 17612d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 17622d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 17632d2da60cSJ. Bruce Fields goto out_free; 17642d2da60cSJ. Bruce Fields } 17652d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 17662d2da60cSJ. Bruce Fields return 0; 17672d2da60cSJ. Bruce Fields out_free: 1768cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1769cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 17702d2da60cSJ. Bruce Fields out: 17712d2da60cSJ. Bruce Fields return -EAGAIN; 17722d2da60cSJ. Bruce Fields } 17732d2da60cSJ. Bruce Fields 17742d2da60cSJ. Bruce Fields static inline int 17752d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 17769f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 17779f06c719SChuck Lever __be32 *p, void *obj) 17782d2da60cSJ. Bruce Fields { 17792d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17802d2da60cSJ. Bruce Fields u32 offset; 17812d2da60cSJ. Bruce Fields u32 maj_stat; 17822d2da60cSJ. Bruce Fields int status; 1783d8ed029dSAlexey Dobriyan __be32 *opaque_len; 17842d2da60cSJ. Bruce Fields struct page **inpages; 17852d2da60cSJ. Bruce Fields int first; 17862d2da60cSJ. Bruce Fields int pad; 17872d2da60cSJ. Bruce Fields struct kvec *iov; 17882d2da60cSJ. Bruce Fields char *tmp; 17892d2da60cSJ. Bruce Fields 17902d2da60cSJ. Bruce Fields opaque_len = p++; 17912d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17922d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 17932d2da60cSJ. Bruce Fields 17949f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 17952d2da60cSJ. Bruce Fields 17962d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 17972d2da60cSJ. Bruce Fields if (status) 17982d2da60cSJ. Bruce Fields return status; 179909cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 18002d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 18012d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 180209cbfeafSKirill A. Shutemov snd_buf->page_base -= first << PAGE_SHIFT; 18037561042fSKevin Coffman /* 18047561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 18057561042fSKevin Coffman * head when wrapping: 18067561042fSKevin Coffman * 18077561042fSKevin Coffman * call_allocate() allocates twice the slack space required 18087561042fSKevin Coffman * by the authentication flavor to rq_callsize. 18097561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 18107561042fSKevin Coffman */ 18112d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 18122d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 18132d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 18142d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 18152d2da60cSJ. Bruce Fields } 181600fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 18177561042fSKevin Coffman /* slack space should prevent this ever happening: */ 18182d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 18192d2da60cSJ. Bruce Fields status = -EIO; 18202d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 18212d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 18222d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1823fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18242d2da60cSJ. Bruce Fields else if (maj_stat) 18252d2da60cSJ. Bruce Fields return status; 18262d2da60cSJ. Bruce Fields 18272d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 18282d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 18292d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 18302d2da60cSJ. Bruce Fields iov = snd_buf->tail; 18312d2da60cSJ. Bruce Fields else 18322d2da60cSJ. Bruce Fields iov = snd_buf->head; 18332d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 18342d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 18352d2da60cSJ. Bruce Fields memset(p, 0, pad); 18362d2da60cSJ. Bruce Fields iov->iov_len += pad; 18372d2da60cSJ. Bruce Fields snd_buf->len += pad; 18382d2da60cSJ. Bruce Fields 18392d2da60cSJ. Bruce Fields return 0; 18402d2da60cSJ. Bruce Fields } 18412d2da60cSJ. Bruce Fields 18421da177e4SLinus Torvalds static int 18431da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 18449f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 18451da177e4SLinus Torvalds { 1846a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 18471da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 18481da177e4SLinus Torvalds gc_base); 18491da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 18501da177e4SLinus Torvalds int status = -EIO; 18511da177e4SLinus Torvalds 1852632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 18531da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 18541da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 18551da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 18561da177e4SLinus Torvalds */ 18579f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 18589f06c719SChuck Lever status = 0; 18591da177e4SLinus Torvalds goto out; 18601da177e4SLinus Torvalds } 18611da177e4SLinus Torvalds switch (gss_cred->gc_service) { 18621da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 18639f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 18649f06c719SChuck Lever status = 0; 18651da177e4SLinus Torvalds break; 18661da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 186789f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 18681da177e4SLinus Torvalds break; 18691da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 187089f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 18711da177e4SLinus Torvalds break; 18721da177e4SLinus Torvalds } 18731da177e4SLinus Torvalds out: 18741da177e4SLinus Torvalds gss_put_ctx(ctx); 1875632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 18761da177e4SLinus Torvalds return status; 18771da177e4SLinus Torvalds } 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds static inline int 18801da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1881d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 18821da177e4SLinus Torvalds { 18831da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 18841da177e4SLinus Torvalds struct xdr_buf integ_buf; 18851da177e4SLinus Torvalds struct xdr_netobj mic; 18861da177e4SLinus Torvalds u32 data_offset, mic_offset; 18871da177e4SLinus Torvalds u32 integ_len; 18881da177e4SLinus Torvalds u32 maj_stat; 18891da177e4SLinus Torvalds int status = -EIO; 18901da177e4SLinus Torvalds 18911da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 18921da177e4SLinus Torvalds if (integ_len & 3) 18931da177e4SLinus Torvalds return status; 18941da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 18951da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 18961da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 18971da177e4SLinus Torvalds return status; 18981da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 18991da177e4SLinus Torvalds return status; 19001da177e4SLinus Torvalds 19011da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 19021da177e4SLinus Torvalds mic_offset - data_offset)) 19031da177e4SLinus Torvalds return status; 19041da177e4SLinus Torvalds 19051da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 19061da177e4SLinus Torvalds return status; 19071da177e4SLinus Torvalds 190800fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 19091da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1910fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19111da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 19121da177e4SLinus Torvalds return status; 19131da177e4SLinus Torvalds return 0; 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds 19162d2da60cSJ. Bruce Fields static inline int 19172d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1918d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 19192d2da60cSJ. Bruce Fields { 19202d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 19212d2da60cSJ. Bruce Fields u32 offset; 19222d2da60cSJ. Bruce Fields u32 opaque_len; 19232d2da60cSJ. Bruce Fields u32 maj_stat; 19242d2da60cSJ. Bruce Fields int status = -EIO; 19252d2da60cSJ. Bruce Fields 19262d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 19272d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 19282d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 19292d2da60cSJ. Bruce Fields return status; 19302d2da60cSJ. Bruce Fields /* remove padding: */ 19312d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 19322d2da60cSJ. Bruce Fields 193300fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 19342d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1935fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19362d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 19372d2da60cSJ. Bruce Fields return status; 19382d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 19392d2da60cSJ. Bruce Fields return status; 19402d2da60cSJ. Bruce Fields 19412d2da60cSJ. Bruce Fields return 0; 19422d2da60cSJ. Bruce Fields } 19432d2da60cSJ. Bruce Fields 1944bf269551SChuck Lever static int 1945bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1946bf269551SChuck Lever __be32 *p, void *obj) 1947bf269551SChuck Lever { 1948bf269551SChuck Lever struct xdr_stream xdr; 1949bf269551SChuck Lever 1950bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1951bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1952bf269551SChuck Lever } 19532d2da60cSJ. Bruce Fields 19541da177e4SLinus Torvalds static int 19551da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1956bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 19571da177e4SLinus Torvalds { 1958a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 19591da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 19601da177e4SLinus Torvalds gc_base); 19611da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1962d8ed029dSAlexey Dobriyan __be32 *savedp = p; 19632d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 19642d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 19651da177e4SLinus Torvalds int status = -EIO; 19661da177e4SLinus Torvalds 19671da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 19681da177e4SLinus Torvalds goto out_decode; 19691da177e4SLinus Torvalds switch (gss_cred->gc_service) { 19701da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 19711da177e4SLinus Torvalds break; 19721da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 19731da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 19741da177e4SLinus Torvalds if (status) 19751da177e4SLinus Torvalds goto out; 19761da177e4SLinus Torvalds break; 19771da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 19782d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 19792d2da60cSJ. Bruce Fields if (status) 19802d2da60cSJ. Bruce Fields goto out; 19811da177e4SLinus Torvalds break; 19821da177e4SLinus Torvalds } 198324b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 19841be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 19852d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 19861da177e4SLinus Torvalds out_decode: 1987bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 19881da177e4SLinus Torvalds out: 19891da177e4SLinus Torvalds gss_put_ctx(ctx); 1990632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1991632f0d05SChuck Lever task->tk_pid, __func__, status); 19921da177e4SLinus Torvalds return status; 19931da177e4SLinus Torvalds } 19941da177e4SLinus Torvalds 1995f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 19961da177e4SLinus Torvalds .owner = THIS_MODULE, 19971da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 19981da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 19991da177e4SLinus Torvalds .create = gss_create, 20001da177e4SLinus Torvalds .destroy = gss_destroy, 2001a960f8d6SFrank Sorenson .hash_cred = gss_hash_cred, 20021da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 200380df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 20046a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 20059568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 2006a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 20071da177e4SLinus Torvalds }; 20081da177e4SLinus Torvalds 2009f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 20101da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 20111da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 2012fba3bad4STrond Myklebust .cr_init = gss_cred_init, 20135c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 20141da177e4SLinus Torvalds .crmatch = gss_match, 20151da177e4SLinus Torvalds .crmarshal = gss_marshal, 20161da177e4SLinus Torvalds .crrefresh = gss_refresh, 20171da177e4SLinus Torvalds .crvalidate = gss_validate, 20181da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 20191da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 20204de6caa2SAndy Adamson .crkey_timeout = gss_key_timeout, 2021a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 20221da177e4SLinus Torvalds }; 20231da177e4SLinus Torvalds 20240df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 20250df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 20266dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 20275c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 20280df7fb74STrond Myklebust .crmatch = gss_match, 20290df7fb74STrond Myklebust .crmarshal = gss_marshal, 20300df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 20310df7fb74STrond Myklebust .crvalidate = gss_validate, 20320df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 20330df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 2034a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 20350df7fb74STrond Myklebust }; 20360df7fb74STrond Myklebust 2037b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 2038c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 20391da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 20401da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 204134769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 204234769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 204334769fc4S\"J. Bruce Fields\ }; 204434769fc4S\"J. Bruce Fields\ 2045b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 2046c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 204734769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 204834769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 204934769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 20501da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 20511da177e4SLinus Torvalds }; 20521da177e4SLinus Torvalds 2053a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 2054a1db410dSStanislav Kinsbursky { 2055a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 2056a1db410dSStanislav Kinsbursky } 2057a1db410dSStanislav Kinsbursky 2058a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 2059a1db410dSStanislav Kinsbursky { 2060a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 2061a1db410dSStanislav Kinsbursky } 2062a1db410dSStanislav Kinsbursky 2063a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 2064a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 2065a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 2066a1db410dSStanislav Kinsbursky }; 2067a1db410dSStanislav Kinsbursky 20681da177e4SLinus Torvalds /* 20691da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 20701da177e4SLinus Torvalds */ 20711da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 20721da177e4SLinus Torvalds { 20731da177e4SLinus Torvalds int err = 0; 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 20761da177e4SLinus Torvalds if (err) 20771da177e4SLinus Torvalds goto out; 20781da177e4SLinus Torvalds err = gss_svc_init(); 20791da177e4SLinus Torvalds if (err) 20801da177e4SLinus Torvalds goto out_unregister; 2081a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 2082a1db410dSStanislav Kinsbursky if (err) 2083a1db410dSStanislav Kinsbursky goto out_svc_exit; 208479a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 20851da177e4SLinus Torvalds return 0; 2086a1db410dSStanislav Kinsbursky out_svc_exit: 2087a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 20881da177e4SLinus Torvalds out_unregister: 20891da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 20901da177e4SLinus Torvalds out: 20911da177e4SLinus Torvalds return err; 20921da177e4SLinus Torvalds } 20931da177e4SLinus Torvalds 20941da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 20951da177e4SLinus Torvalds { 2096a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 20971da177e4SLinus Torvalds gss_svc_shutdown(); 20981da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 2099bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 21001da177e4SLinus Torvalds } 21011da177e4SLinus Torvalds 210271afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 21031da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2104126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 2105126e216aSTrond Myklebust gss_expired_cred_retry_delay, 2106126e216aSTrond Myklebust uint, 0644); 2107126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 2108126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 2109126e216aSTrond Myklebust 21104de6caa2SAndy Adamson module_param_named(key_expire_timeo, 21114de6caa2SAndy Adamson gss_key_expire_timeo, 21124de6caa2SAndy Adamson uint, 0644); 21134de6caa2SAndy Adamson MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " 21144de6caa2SAndy Adamson "credential keys lifetime where the NFS layer cleans up " 21154de6caa2SAndy Adamson "prior to key expiration"); 21164de6caa2SAndy Adamson 21171da177e4SLinus Torvalds module_init(init_rpcsec_gss) 21181da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 2119