11da177e4SLinus Torvalds /* 2f30c2269SUwe Zeisberger * linux/net/sunrpc/auth_gss/auth_gss.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * RPCSEC_GSS client authentication. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 71da177e4SLinus Torvalds * All rights reserved. 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * Dug Song <dugsong@monkey.org> 101da177e4SLinus Torvalds * Andy Adamson <andros@umich.edu> 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 131da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 141da177e4SLinus Torvalds * are met: 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 171da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 181da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 191da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 201da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 211da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 221da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 231da177e4SLinus Torvalds * from this software without specific prior written permission. 241da177e4SLinus Torvalds * 251da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 261da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 271da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 281da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 301da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 311da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 321da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4SLinus Torvalds */ 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #include <linux/module.h> 401da177e4SLinus Torvalds #include <linux/init.h> 411da177e4SLinus Torvalds #include <linux/types.h> 421da177e4SLinus Torvalds #include <linux/slab.h> 431da177e4SLinus Torvalds #include <linux/sched.h> 442d2da60cSJ. Bruce Fields #include <linux/pagemap.h> 451da177e4SLinus Torvalds #include <linux/sunrpc/clnt.h> 461da177e4SLinus Torvalds #include <linux/sunrpc/auth.h> 471da177e4SLinus Torvalds #include <linux/sunrpc/auth_gss.h> 481da177e4SLinus Torvalds #include <linux/sunrpc/svcauth_gss.h> 491da177e4SLinus Torvalds #include <linux/sunrpc/gss_err.h> 501da177e4SLinus Torvalds #include <linux/workqueue.h> 511da177e4SLinus Torvalds #include <linux/sunrpc/rpc_pipe_fs.h> 521da177e4SLinus Torvalds #include <linux/sunrpc/gss_api.h> 531da177e4SLinus Torvalds #include <asm/uaccess.h> 541da177e4SLinus Torvalds 55abfdbd53STrond Myklebust #include "../netns.h" 56abfdbd53STrond Myklebust 57f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 581da177e4SLinus Torvalds 59f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 600df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 611da177e4SLinus Torvalds 62126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 63126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 64126e216aSTrond Myklebust 651da177e4SLinus Torvalds #ifdef RPC_DEBUG 661da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 671da177e4SLinus Torvalds #endif 681da177e4SLinus Torvalds 69725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 701da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 711da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 72adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 731da177e4SLinus Torvalds 7419172284STrond Myklebust struct gss_pipe { 7519172284STrond Myklebust struct rpc_pipe_dir_object pdo; 7619172284STrond Myklebust struct rpc_pipe *pipe; 7719172284STrond Myklebust struct rpc_clnt *clnt; 7819172284STrond Myklebust const char *name; 7919172284STrond Myklebust }; 8019172284STrond Myklebust 811da177e4SLinus Torvalds struct gss_auth { 820285ed1fSTrond Myklebust struct kref kref; 831da177e4SLinus Torvalds struct rpc_auth rpc_auth; 841da177e4SLinus Torvalds struct gss_api_mech *mech; 851da177e4SLinus Torvalds enum rpc_gss_svc service; 861da177e4SLinus Torvalds struct rpc_clnt *client; 87e726340aSTrond Myklebust struct net *net; 8834769fc4S\"J. Bruce Fields\ /* 8934769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 9034769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 9134769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 9234769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 9334769fc4S\"J. Bruce Fields\ */ 9419172284STrond Myklebust struct gss_pipe *gss_pipe[2]; 95bd4a3eb1STrond Myklebust const char *target_name; 961da177e4SLinus Torvalds }; 971da177e4SLinus Torvalds 9879a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 9979a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 10079a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 10179a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 102cf81939dS\"J. Bruce Fields\ 1035d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 104b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 105b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1081da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds atomic_inc(&ctx->count); 1111da177e4SLinus Torvalds return ctx; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static inline void 1151da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1185d28dc82STrond Myklebust gss_free_ctx(ctx); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1215d28dc82STrond Myklebust /* gss_cred_set_ctx: 1225d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1235d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1249beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1255d28dc82STrond Myklebust */ 1261da177e4SLinus Torvalds static void 1271da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1305d28dc82STrond Myklebust 131cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 132cd019f75STrond Myklebust return; 1337b6962b0STrond Myklebust gss_get_ctx(ctx); 134cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 135fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 136cd019f75STrond Myklebust smp_mb__before_clear_bit(); 137fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds static const void * 1411da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1421da177e4SLinus Torvalds { 1431da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1441da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1451da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1461da177e4SLinus Torvalds memcpy(res, p, len); 1471da177e4SLinus Torvalds return q; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static inline const void * 1511da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds const void *q; 1541da177e4SLinus Torvalds unsigned int len; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1571da177e4SLinus Torvalds if (IS_ERR(p)) 1581da177e4SLinus Torvalds return p; 1591da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1601da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1611da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1620f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1631da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1641da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1651da177e4SLinus Torvalds dest->len = len; 1661da177e4SLinus Torvalds return q; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static struct gss_cl_ctx * 1701da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1731da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1741da177e4SLinus Torvalds 1755d28dc82STrond Myklebust rcu_read_lock(); 1761da177e4SLinus Torvalds if (gss_cred->gc_ctx) 1771da177e4SLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1785d28dc82STrond Myklebust rcu_read_unlock(); 1791da177e4SLinus Torvalds return ctx; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds static struct gss_cl_ctx * 1831da177e4SLinus Torvalds gss_alloc_context(void) 1841da177e4SLinus Torvalds { 1851da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1861da177e4SLinus Torvalds 1870f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1881da177e4SLinus Torvalds if (ctx != NULL) { 1891da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1901da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1911da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1921da177e4SLinus Torvalds atomic_set(&ctx->count,1); 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds return ctx; 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1981da177e4SLinus Torvalds static const void * 1991da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2001da177e4SLinus Torvalds { 2011da177e4SLinus Torvalds const void *q; 2021da177e4SLinus Torvalds unsigned int seclen; 2031da177e4SLinus Torvalds unsigned int timeout; 204620038f6SAndy Adamson unsigned long now = jiffies; 2051da177e4SLinus Torvalds u32 window_size; 2061da177e4SLinus Torvalds int ret; 2071da177e4SLinus Torvalds 208620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 209620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 210620038f6SAndy Adamson * the -t value passed to GSSD. 211620038f6SAndy Adamson */ 2121da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2131da177e4SLinus Torvalds if (IS_ERR(p)) 2141da177e4SLinus Torvalds goto err; 2151da177e4SLinus Torvalds if (timeout == 0) 2161da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 217620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 218620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 219620038f6SAndy Adamson * simultaneous requests 220620038f6SAndy Adamson */ 2211da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2221da177e4SLinus Torvalds if (IS_ERR(p)) 2231da177e4SLinus Torvalds goto err; 2241da177e4SLinus Torvalds ctx->gc_win = window_size; 2251da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2261da177e4SLinus Torvalds if (ctx->gc_win == 0) { 227dc5ddce9SJeff Layton /* 228dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 229dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 230dc5ddce9SJeff Layton */ 231dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 232dc5ddce9SJeff Layton if (!IS_ERR(p)) 233dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 234dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2351da177e4SLinus Torvalds goto err; 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds /* copy the opaque wire context */ 2381da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2391da177e4SLinus Torvalds if (IS_ERR(p)) 2401da177e4SLinus Torvalds goto err; 2411da177e4SLinus Torvalds /* import the opaque security context */ 2421da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2431da177e4SLinus Torvalds if (IS_ERR(p)) 2441da177e4SLinus Torvalds goto err; 2451da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2461da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2471da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2481da177e4SLinus Torvalds goto err; 2491da177e4SLinus Torvalds } 250400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2511da177e4SLinus Torvalds if (ret < 0) { 2521da177e4SLinus Torvalds p = ERR_PTR(ret); 2531da177e4SLinus Torvalds goto err; 2541da177e4SLinus Torvalds } 255620038f6SAndy Adamson dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", 256620038f6SAndy Adamson __func__, ctx->gc_expiry, now, timeout); 2571da177e4SLinus Torvalds return q; 2581da177e4SLinus Torvalds err: 259173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2601da177e4SLinus Torvalds return p; 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 26334769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds struct gss_upcall_msg { 2661da177e4SLinus Torvalds atomic_t count; 2677eaf040bSEric W. Biederman kuid_t uid; 2681da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2691da177e4SLinus Torvalds struct list_head list; 2701da177e4SLinus Torvalds struct gss_auth *auth; 2719beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2721da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2731da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2741da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 27534769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2761da177e4SLinus Torvalds }; 2771da177e4SLinus Torvalds 2782aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 27979a3f20bS\"J. Bruce Fields\ { 2802aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 28179a3f20bS\"J. Bruce Fields\ int ret; 28279a3f20bS\"J. Bruce Fields\ 28379a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 2842aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 2852aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 2862aed8b47STrond Myklebust ret = sn->pipe_version; 28779a3f20bS\"J. Bruce Fields\ } else 28879a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 28979a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 29079a3f20bS\"J. Bruce Fields\ return ret; 29179a3f20bS\"J. Bruce Fields\ } 29279a3f20bS\"J. Bruce Fields\ 2932aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 29479a3f20bS\"J. Bruce Fields\ { 2952aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 2962aed8b47STrond Myklebust 2972aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 2982aed8b47STrond Myklebust sn->pipe_version = -1; 29979a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 30079a3f20bS\"J. Bruce Fields\ } 30179a3f20bS\"J. Bruce Fields\ } 30279a3f20bS\"J. Bruce Fields\ 3031da177e4SLinus Torvalds static void 3041da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 3051da177e4SLinus Torvalds { 306e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3071da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 3081da177e4SLinus Torvalds return; 3092aed8b47STrond Myklebust put_pipe_version(net); 3101da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3111da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3121da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 313f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3141da177e4SLinus Torvalds kfree(gss_msg); 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds static struct gss_upcall_msg * 3187eaf040bSEric W. Biederman __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3191da177e4SLinus Torvalds { 3201da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3219beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3220b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3231da177e4SLinus Torvalds continue; 3241da177e4SLinus Torvalds atomic_inc(&pos->count); 325632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3261da177e4SLinus Torvalds return pos; 3271da177e4SLinus Torvalds } 328632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3291da177e4SLinus Torvalds return NULL; 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 332720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3331da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3341da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3351da177e4SLinus Torvalds */ 3361da177e4SLinus Torvalds static inline struct gss_upcall_msg * 337053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3381da177e4SLinus Torvalds { 3399beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3401da177e4SLinus Torvalds struct gss_upcall_msg *old; 3411da177e4SLinus Torvalds 3429beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3439beae467SStanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3441da177e4SLinus Torvalds if (old == NULL) { 3451da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3469beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3471da177e4SLinus Torvalds } else 3481da177e4SLinus Torvalds gss_msg = old; 3499beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3501da177e4SLinus Torvalds return gss_msg; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds static void 3541da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3551da177e4SLinus Torvalds { 3561da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3571da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3581da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3591da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds static void 3631da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3641da177e4SLinus Torvalds { 3659beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3661da177e4SLinus Torvalds 3673b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3683b68aaeaSTrond Myklebust return; 3699beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3703b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3711da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3729beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds static void 376126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 377126e216aSTrond Myklebust { 378126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 379126e216aSTrond Myklebust case 0: 380126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 381126e216aSTrond Myklebust break; 382126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 383126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 384126e216aSTrond Myklebust break; 385126e216aSTrond Myklebust case -EKEYEXPIRED: 386126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 387126e216aSTrond Myklebust } 388126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 389126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 390126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 391126e216aSTrond Myklebust } 392126e216aSTrond Myklebust 393126e216aSTrond Myklebust static void 3941da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 3951da177e4SLinus Torvalds { 396a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 3971da177e4SLinus Torvalds struct gss_cred, gc_base); 3981da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3999beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 4001da177e4SLinus Torvalds 4019beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 402126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 4039beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 404126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 4051da177e4SLinus Torvalds gss_release_msg(gss_msg); 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds 40834769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 40934769fc4S\"J. Bruce Fields\ { 41090602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 41190602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 41290602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 41390602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 41490602c7bSEric W. Biederman BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); 41534769fc4S\"J. Bruce Fields\ } 41634769fc4S\"J. Bruce Fields\ 4178b1c7bf5SOlga Kornievskaia static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 418bd4a3eb1STrond Myklebust const char *service_name, 419bd4a3eb1STrond Myklebust const char *target_name) 42034769fc4S\"J. Bruce Fields\ { 421683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4228b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4238b1c7bf5SOlga Kornievskaia int len = 0; 4248b1c7bf5SOlga Kornievskaia 4258b1c7bf5SOlga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 426683ac665STrond Myklebust mech->gm_name, 42790602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4288b1c7bf5SOlga Kornievskaia p += gss_msg->msg.len; 429bd4a3eb1STrond Myklebust if (target_name) { 430bd4a3eb1STrond Myklebust len = sprintf(p, "target=%s ", target_name); 4318b1c7bf5SOlga Kornievskaia p += len; 4328b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4338b1c7bf5SOlga Kornievskaia } 43468c97153STrond Myklebust if (service_name != NULL) { 43568c97153STrond Myklebust len = sprintf(p, "service=%s ", service_name); 4362efef708SOlga Kornievskaia p += len; 4372efef708SOlga Kornievskaia gss_msg->msg.len += len; 4382efef708SOlga Kornievskaia } 439683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 440f8628220SKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 441683ac665STrond Myklebust p += len; 442683ac665STrond Myklebust gss_msg->msg.len += len; 443683ac665STrond Myklebust } 4448b1c7bf5SOlga Kornievskaia len = sprintf(p, "\n"); 4458b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4468b1c7bf5SOlga Kornievskaia 44734769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 44834769fc4S\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 44934769fc4S\"J. Bruce Fields\ } 45034769fc4S\"J. Bruce Fields\ 45168c97153STrond Myklebust static struct gss_upcall_msg * 452e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 4537eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4541da177e4SLinus Torvalds { 4551da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 45679a3f20bS\"J. Bruce Fields\ int vers; 4571da177e4SLinus Torvalds 4580f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 459db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 460db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 461e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 46279a3f20bS\"J. Bruce Fields\ if (vers < 0) { 46379a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 46479a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 46579a3f20bS\"J. Bruce Fields\ } 46619172284STrond Myklebust gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; 4671da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 4681da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 4691da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 4701da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 4711da177e4SLinus Torvalds gss_msg->uid = uid; 4721da177e4SLinus Torvalds gss_msg->auth = gss_auth; 473bd4a3eb1STrond Myklebust switch (vers) { 474bd4a3eb1STrond Myklebust case 0: 475bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 476bd4a3eb1STrond Myklebust default: 477bd4a3eb1STrond Myklebust gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 478bd4a3eb1STrond Myklebust }; 4791da177e4SLinus Torvalds return gss_msg; 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds static struct gss_upcall_msg * 483e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 4841da177e4SLinus Torvalds { 4857c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4867c67db3aSTrond Myklebust struct gss_cred, gc_base); 4871da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4887eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 4891da177e4SLinus Torvalds 490e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 491db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 492db75b3d6S\"J. Bruce Fields\ return gss_new; 493053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 4941da177e4SLinus Torvalds if (gss_msg == gss_new) { 4959beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4961da177e4SLinus Torvalds if (res) { 4971da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4981da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4991da177e4SLinus Torvalds } 5001da177e4SLinus Torvalds } else 5011da177e4SLinus Torvalds gss_release_msg(gss_new); 5021da177e4SLinus Torvalds return gss_msg; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 505b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 506b03568c3S\"J. Bruce Fields\ { 507b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 508b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 509b03568c3S\"J. Bruce Fields\ 510b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 511b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 512b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 513b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 514b03568c3S\"J. Bruce Fields\ } 515b03568c3S\"J. Bruce Fields\ } 516b03568c3S\"J. Bruce Fields\ 5171da177e4SLinus Torvalds static inline int 5181da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5191da177e4SLinus Torvalds { 520a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5214a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5221da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5231da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5241da177e4SLinus Torvalds struct gss_cred, gc_base); 5251da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5269beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5271da177e4SLinus Torvalds int err = 0; 5281da177e4SLinus Torvalds 529632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 530cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 531e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 532480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 53379a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 53479a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 53579a3f20bS\"J. Bruce Fields\ warn_gssd(); 53679a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 53779a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 538d1a8016aSBryan Schumaker return -EAGAIN; 53979a3f20bS\"J. Bruce Fields\ } 5401da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5411da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5421da177e4SLinus Torvalds goto out; 5431da177e4SLinus Torvalds } 5449beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5459beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5461da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5475d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 548126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5491da177e4SLinus Torvalds task->tk_timeout = 0; 5501da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5511da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5521da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5535d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 554126e216aSTrond Myklebust } else { 555126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5561da177e4SLinus Torvalds err = gss_msg->msg.errno; 557126e216aSTrond Myklebust } 5589beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5591da177e4SLinus Torvalds gss_release_msg(gss_msg); 5601da177e4SLinus Torvalds out: 561632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 562cdba321eSEric W. Biederman task->tk_pid, __func__, 563cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 5641da177e4SLinus Torvalds return err; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds static inline int 5681da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5691da177e4SLinus Torvalds { 570e726340aSTrond Myklebust struct net *net = gss_auth->net; 571abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 5729beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5731da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5741da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 575abfdbd53STrond Myklebust unsigned long timeout; 5761da177e4SLinus Torvalds DEFINE_WAIT(wait); 577d36ccb9cSTrond Myklebust int err; 5781da177e4SLinus Torvalds 579cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 580cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 58179a3f20bS\"J. Bruce Fields\ retry: 582d36ccb9cSTrond Myklebust err = 0; 583abfdbd53STrond Myklebust /* Default timeout is 15s unless we know that gssd is not running */ 584abfdbd53STrond Myklebust timeout = 15 * HZ; 585abfdbd53STrond Myklebust if (!sn->gssd_running) 586abfdbd53STrond Myklebust timeout = HZ >> 2; 587e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 58879a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 58979a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 5902aed8b47STrond Myklebust sn->pipe_version >= 0, timeout); 5912aed8b47STrond Myklebust if (sn->pipe_version < 0) { 592abfdbd53STrond Myklebust if (err == 0) 593abfdbd53STrond Myklebust sn->gssd_running = 0; 594d1a8016aSBryan Schumaker warn_gssd(); 595d1a8016aSBryan Schumaker err = -EACCES; 596d1a8016aSBryan Schumaker } 597d36ccb9cSTrond Myklebust if (err < 0) 59879a3f20bS\"J. Bruce Fields\ goto out; 59979a3f20bS\"J. Bruce Fields\ goto retry; 60079a3f20bS\"J. Bruce Fields\ } 6011da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6021da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6031da177e4SLinus Torvalds goto out; 6041da177e4SLinus Torvalds } 6059beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6061da177e4SLinus Torvalds for (;;) { 6075afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6089beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6091da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds } 6129beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6135afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6141da177e4SLinus Torvalds err = -ERESTARTSYS; 6151da177e4SLinus Torvalds goto out_intr; 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds schedule(); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds if (gss_msg->ctx) 6207b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6211da177e4SLinus Torvalds else 6221da177e4SLinus Torvalds err = gss_msg->msg.errno; 6239beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6241da177e4SLinus Torvalds out_intr: 6251da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6261da177e4SLinus Torvalds gss_release_msg(gss_msg); 6271da177e4SLinus Torvalds out: 628632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 629cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6301da177e4SLinus Torvalds return err; 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds static ssize_t 6361da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6371da177e4SLinus Torvalds { 6381da177e4SLinus Torvalds const void *p, *end; 6391da177e4SLinus Torvalds void *buf; 6401da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 641496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6421da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 64390602c7bSEric W. Biederman uid_t id; 64490602c7bSEric W. Biederman kuid_t uid; 6453b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6481da177e4SLinus Torvalds goto out; 6491da177e4SLinus Torvalds err = -ENOMEM; 6500f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6511da177e4SLinus Torvalds if (!buf) 6521da177e4SLinus Torvalds goto out; 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds err = -EFAULT; 6551da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6561da177e4SLinus Torvalds goto err; 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 65990602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6601da177e4SLinus Torvalds if (IS_ERR(p)) { 6611da177e4SLinus Torvalds err = PTR_ERR(p); 6621da177e4SLinus Torvalds goto err; 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 66590602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 66690602c7bSEric W. Biederman if (!uid_valid(uid)) { 66790602c7bSEric W. Biederman err = -EINVAL; 66890602c7bSEric W. Biederman goto err; 66990602c7bSEric W. Biederman } 67090602c7bSEric W. Biederman 6711da177e4SLinus Torvalds err = -ENOMEM; 6721da177e4SLinus Torvalds ctx = gss_alloc_context(); 6731da177e4SLinus Torvalds if (ctx == NULL) 6741da177e4SLinus Torvalds goto err; 6753b68aaeaSTrond Myklebust 6763b68aaeaSTrond Myklebust err = -ENOENT; 6773b68aaeaSTrond Myklebust /* Find a matching upcall */ 6789beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6799beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6803b68aaeaSTrond Myklebust if (gss_msg == NULL) { 6819beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6823b68aaeaSTrond Myklebust goto err_put_ctx; 6833b68aaeaSTrond Myklebust } 6843b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 6859beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6863b68aaeaSTrond Myklebust 6876e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6881da177e4SLinus Torvalds if (IS_ERR(p)) { 6891da177e4SLinus Torvalds err = PTR_ERR(p); 690486bad2eSJeff Layton switch (err) { 691486bad2eSJeff Layton case -EACCES: 692dc5ddce9SJeff Layton case -EKEYEXPIRED: 693486bad2eSJeff Layton gss_msg->msg.errno = err; 694486bad2eSJeff Layton err = mlen; 695486bad2eSJeff Layton break; 696486bad2eSJeff Layton case -EFAULT: 697486bad2eSJeff Layton case -ENOMEM: 698486bad2eSJeff Layton case -EINVAL: 699486bad2eSJeff Layton case -ENOSYS: 700486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 701486bad2eSJeff Layton break; 702486bad2eSJeff Layton default: 703486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7046c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 705486bad2eSJeff Layton BUG(); 706486bad2eSJeff Layton } 7073b68aaeaSTrond Myklebust goto err_release_msg; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7103b68aaeaSTrond Myklebust err = mlen; 7113b68aaeaSTrond Myklebust 7123b68aaeaSTrond Myklebust err_release_msg: 7139beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7141da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7159beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7161da177e4SLinus Torvalds gss_release_msg(gss_msg); 7171da177e4SLinus Torvalds err_put_ctx: 7181da177e4SLinus Torvalds gss_put_ctx(ctx); 7191da177e4SLinus Torvalds err: 7201da177e4SLinus Torvalds kfree(buf); 7211da177e4SLinus Torvalds out: 722632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7231da177e4SLinus Torvalds return err; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds 72634769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 727cf81939dS\"J. Bruce Fields\ { 7282aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7292aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 73034769fc4S\"J. Bruce Fields\ int ret = 0; 73134769fc4S\"J. Bruce Fields\ 73279a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 7332aed8b47STrond Myklebust if (sn->pipe_version < 0) { 73434769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 7352aed8b47STrond Myklebust sn->pipe_version = new_version; 73679a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 73779a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 7382aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 73934769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 74034769fc4S\"J. Bruce Fields\ ret = -EBUSY; 74134769fc4S\"J. Bruce Fields\ goto out; 74279a3f20bS\"J. Bruce Fields\ } 7432aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 74434769fc4S\"J. Bruce Fields\ out: 74579a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 74634769fc4S\"J. Bruce Fields\ return ret; 74734769fc4S\"J. Bruce Fields\ 74834769fc4S\"J. Bruce Fields\ } 74934769fc4S\"J. Bruce Fields\ 75034769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 75134769fc4S\"J. Bruce Fields\ { 75234769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 75334769fc4S\"J. Bruce Fields\ } 75434769fc4S\"J. Bruce Fields\ 75534769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 75634769fc4S\"J. Bruce Fields\ { 75734769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 758cf81939dS\"J. Bruce Fields\ } 759cf81939dS\"J. Bruce Fields\ 7601da177e4SLinus Torvalds static void 7611da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 7621da177e4SLinus Torvalds { 7632aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7649beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7651da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 7661da177e4SLinus Torvalds 7675a67657aSTrond Myklebust restart: 7689beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7699beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7706e84c7b6STrond Myklebust 7715a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7725a67657aSTrond Myklebust continue; 7731da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 7741da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7751da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7769beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7771da177e4SLinus Torvalds gss_release_msg(gss_msg); 7785a67657aSTrond Myklebust goto restart; 7791da177e4SLinus Torvalds } 7809beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 781cf81939dS\"J. Bruce Fields\ 7822aed8b47STrond Myklebust put_pipe_version(net); 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds static void 7861da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7871da177e4SLinus Torvalds { 7881da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds if (msg->errno < 0) { 791632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 792632f0d05SChuck Lever __func__, gss_msg); 7931da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7941da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 795b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 796b03568c3S\"J. Bruce Fields\ warn_gssd(); 7971da177e4SLinus Torvalds gss_release_msg(gss_msg); 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds 80119172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 80219172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 803ccdc28f8SStanislav Kinsbursky { 80419172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 80519172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 806ccdc28f8SStanislav Kinsbursky 80719172284STrond Myklebust if (pipe->dentry != NULL) { 80819172284STrond Myklebust rpc_unlink(pipe->dentry); 80919172284STrond Myklebust pipe->dentry = NULL; 8106b2fddd3STrond Myklebust } 811ccdc28f8SStanislav Kinsbursky } 812ccdc28f8SStanislav Kinsbursky 81319172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 81419172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 815ccdc28f8SStanislav Kinsbursky { 81619172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8176b2fddd3STrond Myklebust struct dentry *dentry; 818ccdc28f8SStanislav Kinsbursky 81919172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 82019172284STrond Myklebust if (IS_ERR(dentry)) 82119172284STrond Myklebust return PTR_ERR(dentry); 82219172284STrond Myklebust p->pipe->dentry = dentry; 823ccdc28f8SStanislav Kinsbursky return 0; 82419172284STrond Myklebust } 825ccdc28f8SStanislav Kinsbursky 82619172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 82719172284STrond Myklebust .create = gss_pipe_dentry_create, 82819172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 82919172284STrond Myklebust }; 83019172284STrond Myklebust 83119172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 83219172284STrond Myklebust const char *name, 83319172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 83419172284STrond Myklebust { 83519172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 83619172284STrond Myklebust struct gss_pipe *p; 83719172284STrond Myklebust int err = -ENOMEM; 83819172284STrond Myklebust 83919172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 84019172284STrond Myklebust if (p == NULL) 84119172284STrond Myklebust goto err; 84219172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 84319172284STrond Myklebust if (IS_ERR(p->pipe)) { 84419172284STrond Myklebust err = PTR_ERR(p->pipe); 84519172284STrond Myklebust goto err_free_gss_pipe; 84619172284STrond Myklebust } 84719172284STrond Myklebust p->name = name; 84819172284STrond Myklebust p->clnt = clnt; 84919172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 85019172284STrond Myklebust &gss_pipe_dir_object_ops, 85119172284STrond Myklebust p); 85219172284STrond Myklebust err = rpc_add_pipe_dir_object(net, &clnt->cl_pipedir_objects, &p->pdo); 85319172284STrond Myklebust if (!err) 85419172284STrond Myklebust return p; 85519172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 85619172284STrond Myklebust err_free_gss_pipe: 85719172284STrond Myklebust kfree(p); 8586b2fddd3STrond Myklebust err: 85919172284STrond Myklebust return ERR_PTR(err); 860ccdc28f8SStanislav Kinsbursky } 861ccdc28f8SStanislav Kinsbursky 86219172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 863ccdc28f8SStanislav Kinsbursky { 86419172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 86519172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 866ccdc28f8SStanislav Kinsbursky 86719172284STrond Myklebust rpc_remove_pipe_dir_object(net, 86819172284STrond Myklebust &clnt->cl_pipedir_objects, 86919172284STrond Myklebust &p->pdo); 87019172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 87119172284STrond Myklebust kfree(p); 872ccdc28f8SStanislav Kinsbursky } 873ccdc28f8SStanislav Kinsbursky 87419172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 875ccdc28f8SStanislav Kinsbursky { 87619172284STrond Myklebust if (p != NULL) 87719172284STrond Myklebust __gss_pipe_free(p); 878ccdc28f8SStanislav Kinsbursky } 879ccdc28f8SStanislav Kinsbursky 8801da177e4SLinus Torvalds /* 8811da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 8821da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8831da177e4SLinus Torvalds */ 8841da177e4SLinus Torvalds static struct rpc_auth * 885c2190661STrond Myklebust gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 8861da177e4SLinus Torvalds { 887c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 8881da177e4SLinus Torvalds struct gss_auth *gss_auth; 88919172284STrond Myklebust struct gss_pipe *gss_pipe; 8901da177e4SLinus Torvalds struct rpc_auth * auth; 8916a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 8966a19275aSJ. Bruce Fields return ERR_PTR(err); 8971da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8981da177e4SLinus Torvalds goto out_dec; 899bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 900c2190661STrond Myklebust if (args->target_name) { 901c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 902bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 903bd4a3eb1STrond Myklebust goto err_free; 904bd4a3eb1STrond Myklebust } 9051da177e4SLinus Torvalds gss_auth->client = clnt; 906e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 9076a19275aSJ. Bruce Fields err = -EINVAL; 9081da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 9091da177e4SLinus Torvalds if (!gss_auth->mech) { 9109b1d75b7STrond Myklebust dprintk("RPC: Pseudoflavor %d not found!\n", flavor); 911e726340aSTrond Myklebust goto err_put_net; 9121da177e4SLinus Torvalds } 9131da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 914438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 915438b6fdeSJ. Bruce Fields goto err_put_mech; 9161da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 9171da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 9181da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 9191da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 9201da177e4SLinus Torvalds auth->au_flavor = flavor; 9211da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 9220285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 9231da177e4SLinus Torvalds 92419172284STrond Myklebust err = rpcauth_init_credcache(auth); 92519172284STrond Myklebust if (err) 92619172284STrond Myklebust goto err_put_mech; 92734769fc4S\"J. Bruce Fields\ /* 92834769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 92934769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 93034769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 93134769fc4S\"J. Bruce Fields\ * the new pipe first. 93234769fc4S\"J. Bruce Fields\ */ 93319172284STrond Myklebust gss_pipe = gss_pipe_alloc(clnt, "gssd", &gss_upcall_ops_v1); 93419172284STrond Myklebust if (IS_ERR(gss_pipe)) { 93519172284STrond Myklebust err = PTR_ERR(gss_pipe); 93619172284STrond Myklebust goto err_destroy_credcache; 9376a19275aSJ. Bruce Fields } 93819172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 9391da177e4SLinus Torvalds 94019172284STrond Myklebust gss_pipe = gss_pipe_alloc(clnt, gss_auth->mech->gm_name, 94119172284STrond Myklebust &gss_upcall_ops_v0); 94219172284STrond Myklebust if (IS_ERR(gss_pipe)) { 94319172284STrond Myklebust err = PTR_ERR(gss_pipe); 944c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 945c239d83bSStanislav Kinsbursky } 94619172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 94707a2bf1dSTrond Myklebust 9481da177e4SLinus Torvalds return auth; 949c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 95019172284STrond Myklebust __gss_pipe_free(gss_auth->gss_pipe[1]); 95119172284STrond Myklebust err_destroy_credcache: 95219172284STrond Myklebust rpcauth_destroy_credcache(auth); 9531da177e4SLinus Torvalds err_put_mech: 9541da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 955e726340aSTrond Myklebust err_put_net: 956e726340aSTrond Myklebust put_net(gss_auth->net); 9571da177e4SLinus Torvalds err_free: 958bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 9591da177e4SLinus Torvalds kfree(gss_auth); 9601da177e4SLinus Torvalds out_dec: 9611da177e4SLinus Torvalds module_put(THIS_MODULE); 9626a19275aSJ. Bruce Fields return ERR_PTR(err); 9631da177e4SLinus Torvalds } 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds static void 9660285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 9670285ed1fSTrond Myklebust { 96819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 96919172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 9700285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 971e726340aSTrond Myklebust put_net(gss_auth->net); 972bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 9730285ed1fSTrond Myklebust 9740285ed1fSTrond Myklebust kfree(gss_auth); 9750285ed1fSTrond Myklebust module_put(THIS_MODULE); 9760285ed1fSTrond Myklebust } 9770285ed1fSTrond Myklebust 9780285ed1fSTrond Myklebust static void 9790285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 9800285ed1fSTrond Myklebust { 9810285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9820285ed1fSTrond Myklebust 9830285ed1fSTrond Myklebust gss_free(gss_auth); 9840285ed1fSTrond Myklebust } 9850285ed1fSTrond Myklebust 9860285ed1fSTrond Myklebust static void 9871da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 9881da177e4SLinus Torvalds { 98919172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 99019172284STrond Myklebust struct gss_auth, rpc_auth); 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9931da177e4SLinus Torvalds auth, auth->au_flavor); 9941da177e4SLinus Torvalds 99519172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 99619172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 99719172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 99819172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 9993ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 10003ab9bb72STrond Myklebust 10010285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 10040df7fb74STrond Myklebust /* 10050df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 10060df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 10070df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 10080df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 10090df7fb74STrond Myklebust */ 10100df7fb74STrond Myklebust static int 10110df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 10120df7fb74STrond Myklebust { 10130df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10140df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10150df7fb74STrond Myklebust struct rpc_task *task; 10160df7fb74STrond Myklebust 10170df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 10186dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 10190df7fb74STrond Myklebust return 0; 10200df7fb74STrond Myklebust 10210df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 10220df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 10230df7fb74STrond Myklebust 10240df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 10250df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 10260df7fb74STrond Myklebust get_rpccred(cred); 10270df7fb74STrond Myklebust 1028080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 10290df7fb74STrond Myklebust if (!IS_ERR(task)) 10300df7fb74STrond Myklebust rpc_put_task(task); 10310df7fb74STrond Myklebust 10320df7fb74STrond Myklebust put_rpccred(cred); 10330df7fb74STrond Myklebust return 1; 10340df7fb74STrond Myklebust } 10350df7fb74STrond Myklebust 10360df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 10371da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 10381da177e4SLinus Torvalds * allocated before freeing them. */ 10391da177e4SLinus Torvalds static void 10405d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 10411da177e4SLinus Torvalds { 1042632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 10431da177e4SLinus Torvalds 10440d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 10451da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 10461da177e4SLinus Torvalds kfree(ctx); 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds static void 10505d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 10515d28dc82STrond Myklebust { 10525d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 10535d28dc82STrond Myklebust gss_do_free_ctx(ctx); 10545d28dc82STrond Myklebust } 10555d28dc82STrond Myklebust 10565d28dc82STrond Myklebust static void 10575d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 10585d28dc82STrond Myklebust { 10595d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10605d28dc82STrond Myklebust } 10615d28dc82STrond Myklebust 10625d28dc82STrond Myklebust static void 106331be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 10641da177e4SLinus Torvalds { 1065632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 106631be5bf1STrond Myklebust kfree(gss_cred); 106731be5bf1STrond Myklebust } 10681da177e4SLinus Torvalds 106931be5bf1STrond Myklebust static void 107031be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 107131be5bf1STrond Myklebust { 107231be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 107331be5bf1STrond Myklebust gss_free_cred(gss_cred); 107431be5bf1STrond Myklebust } 10751da177e4SLinus Torvalds 107631be5bf1STrond Myklebust static void 10776dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 107831be5bf1STrond Myklebust { 10795d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10800285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10815d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10825d28dc82STrond Myklebust 1083a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 108431be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10855d28dc82STrond Myklebust if (ctx) 10865d28dc82STrond Myklebust gss_put_ctx(ctx); 10870285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds 10906dcd3926SJeff Layton static void 10916dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 10926dcd3926SJeff Layton { 10936dcd3926SJeff Layton 10946dcd3926SJeff Layton if (gss_destroying_context(cred)) 10956dcd3926SJeff Layton return; 10966dcd3926SJeff Layton gss_destroy_nullcred(cred); 10976dcd3926SJeff Layton } 10986dcd3926SJeff Layton 10991da177e4SLinus Torvalds /* 11001da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 11011da177e4SLinus Torvalds */ 11021da177e4SLinus Torvalds static struct rpc_cred * 11038a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 11041da177e4SLinus Torvalds { 11058a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 11061da177e4SLinus Torvalds } 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds static struct rpc_cred * 11098a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 11101da177e4SLinus Torvalds { 11111da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 11121da177e4SLinus Torvalds struct gss_cred *cred = NULL; 11131da177e4SLinus Torvalds int err = -ENOMEM; 11141da177e4SLinus Torvalds 1115632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1116cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1117cdba321eSEric W. Biederman auth->au_flavor); 11181da177e4SLinus Torvalds 11190f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 11201da177e4SLinus Torvalds goto out_err; 11211da177e4SLinus Torvalds 11225fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 11231da177e4SLinus Torvalds /* 11241da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 11251da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 11261da177e4SLinus Torvalds */ 1127fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 11281da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 112968c97153STrond Myklebust cred->gc_principal = NULL; 113068c97153STrond Myklebust if (acred->machine_cred) 113168c97153STrond Myklebust cred->gc_principal = acred->principal; 11320285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 11331da177e4SLinus Torvalds return &cred->gc_base; 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds out_err: 1136632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 11371da177e4SLinus Torvalds return ERR_PTR(err); 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static int 1141fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1142fba3bad4STrond Myklebust { 1143fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1144fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1145fba3bad4STrond Myklebust int err; 1146fba3bad4STrond Myklebust 1147fba3bad4STrond Myklebust do { 1148fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1149fba3bad4STrond Myklebust } while (err == -EAGAIN); 1150fba3bad4STrond Myklebust return err; 1151fba3bad4STrond Myklebust } 1152fba3bad4STrond Myklebust 1153fba3bad4STrond Myklebust static int 11548a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11551da177e4SLinus Torvalds { 11561da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11571da177e4SLinus Torvalds 1158cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11598a317760STrond Myklebust goto out; 11601da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1161cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1162cd019f75STrond Myklebust return 0; 1163cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11641da177e4SLinus Torvalds return 0; 11658a317760STrond Myklebust out: 116668c97153STrond Myklebust if (acred->principal != NULL) { 116768c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 116868c97153STrond Myklebust return 0; 116968c97153STrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 117068c97153STrond Myklebust } 117168c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 11727c67db3aSTrond Myklebust return 0; 11730b4d51b0SEric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvalds /* 11771da177e4SLinus Torvalds * Marshal credentials. 11781da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 11791da177e4SLinus Torvalds */ 1180d8ed029dSAlexey Dobriyan static __be32 * 1181d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 11821da177e4SLinus Torvalds { 1183a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1184a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 11851da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11861da177e4SLinus Torvalds gc_base); 11871da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1188d8ed029dSAlexey Dobriyan __be32 *cred_len; 11891da177e4SLinus Torvalds u32 maj_stat = 0; 11901da177e4SLinus Torvalds struct xdr_netobj mic; 11911da177e4SLinus Torvalds struct kvec iov; 11921da177e4SLinus Torvalds struct xdr_buf verf_buf; 11931da177e4SLinus Torvalds 1194632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11971da177e4SLinus Torvalds cred_len = p++; 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 12001da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 12011da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 12041da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 12051da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 12061da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 12071da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 12081da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 12111da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1212a4f0835cSTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1213808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 12141da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 12151da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds /* set verifier flavor*/ 12181da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 122100fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 12221da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1223fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12241da177e4SLinus Torvalds } else if (maj_stat != 0) { 12251da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 12261da177e4SLinus Torvalds goto out_put_ctx; 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 12291da177e4SLinus Torvalds gss_put_ctx(ctx); 12301da177e4SLinus Torvalds return p; 12311da177e4SLinus Torvalds out_put_ctx: 12321da177e4SLinus Torvalds gss_put_ctx(ctx); 12331da177e4SLinus Torvalds return NULL; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 1236cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1237cd019f75STrond Myklebust { 1238a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1239cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1240cd019f75STrond Myklebust struct gss_cred, 1241cd019f75STrond Myklebust gc_base); 1242cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1243cd019f75STrond Myklebust struct auth_cred acred = { 1244cd019f75STrond Myklebust .uid = oldcred->cr_uid, 124568c97153STrond Myklebust .principal = gss_cred->gc_principal, 124668c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1247cd019f75STrond Myklebust }; 1248cd019f75STrond Myklebust struct rpc_cred *new; 1249cd019f75STrond Myklebust 1250cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1251cd019f75STrond Myklebust if (IS_ERR(new)) 1252cd019f75STrond Myklebust return PTR_ERR(new); 1253a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1254cd019f75STrond Myklebust put_rpccred(oldcred); 1255cd019f75STrond Myklebust return 0; 1256cd019f75STrond Myklebust } 1257cd019f75STrond Myklebust 1258126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1259126e216aSTrond Myklebust { 1260126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1261126e216aSTrond Myklebust unsigned long now = jiffies; 1262126e216aSTrond Myklebust unsigned long begin, expire; 1263126e216aSTrond Myklebust struct gss_cred *gss_cred; 1264126e216aSTrond Myklebust 1265126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1266126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1267126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1268126e216aSTrond Myklebust 1269126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1270126e216aSTrond Myklebust return 1; 1271126e216aSTrond Myklebust } 1272126e216aSTrond Myklebust return 0; 1273126e216aSTrond Myklebust } 1274126e216aSTrond Myklebust 12751da177e4SLinus Torvalds /* 12761da177e4SLinus Torvalds * Refresh credentials. XXX - finish 12771da177e4SLinus Torvalds */ 12781da177e4SLinus Torvalds static int 12791da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 12801da177e4SLinus Torvalds { 1281a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1282cd019f75STrond Myklebust int ret = 0; 12831da177e4SLinus Torvalds 1284126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1285126e216aSTrond Myklebust return -EKEYEXPIRED; 1286126e216aSTrond Myklebust 1287cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1288cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1289cd019f75STrond Myklebust ret = gss_renew_cred(task); 1290cd019f75STrond Myklebust if (ret < 0) 1291cd019f75STrond Myklebust goto out; 1292a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1293cd019f75STrond Myklebust } 1294cd019f75STrond Myklebust 1295cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1296cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1297cd019f75STrond Myklebust out: 1298cd019f75STrond Myklebust return ret; 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds 13010df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 13020df7fb74STrond Myklebust static int 13030df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 13040df7fb74STrond Myklebust { 13050df7fb74STrond Myklebust return -EACCES; 13060df7fb74STrond Myklebust } 13070df7fb74STrond Myklebust 1308d8ed029dSAlexey Dobriyan static __be32 * 1309d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 13101da177e4SLinus Torvalds { 1311a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 13121da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1313d8ed029dSAlexey Dobriyan __be32 seq; 13141da177e4SLinus Torvalds struct kvec iov; 13151da177e4SLinus Torvalds struct xdr_buf verf_buf; 13161da177e4SLinus Torvalds struct xdr_netobj mic; 13171da177e4SLinus Torvalds u32 flav,len; 13181da177e4SLinus Torvalds u32 maj_stat; 13191da177e4SLinus Torvalds 1320632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds flav = ntohl(*p++); 13231da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 13241da177e4SLinus Torvalds goto out_bad; 13251da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 13261da177e4SLinus Torvalds goto out_bad; 13271da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 13281da177e4SLinus Torvalds iov.iov_base = &seq; 13291da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 13301da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 13311da177e4SLinus Torvalds mic.data = (u8 *)p; 13321da177e4SLinus Torvalds mic.len = len; 13331da177e4SLinus Torvalds 133400fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 13351da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1336fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13370df7fb74STrond Myklebust if (maj_stat) { 1338632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1339632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 13401da177e4SLinus Torvalds goto out_bad; 13410df7fb74STrond Myklebust } 134224b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 134324b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 13441be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 13451da177e4SLinus Torvalds gss_put_ctx(ctx); 1346632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1347632f0d05SChuck Lever task->tk_pid, __func__); 13481da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 13491da177e4SLinus Torvalds out_bad: 13501da177e4SLinus Torvalds gss_put_ctx(ctx); 1351632f0d05SChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 13521da177e4SLinus Torvalds return NULL; 13531da177e4SLinus Torvalds } 13541da177e4SLinus Torvalds 13559f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13569f06c719SChuck Lever __be32 *p, void *obj) 13579f06c719SChuck Lever { 13589f06c719SChuck Lever struct xdr_stream xdr; 13599f06c719SChuck Lever 13609f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13619f06c719SChuck Lever encode(rqstp, &xdr, obj); 13629f06c719SChuck Lever } 13639f06c719SChuck Lever 13641da177e4SLinus Torvalds static inline int 13651da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13669f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13679f06c719SChuck Lever __be32 *p, void *obj) 13681da177e4SLinus Torvalds { 13691da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13701da177e4SLinus Torvalds struct xdr_buf integ_buf; 1371d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 13721da177e4SLinus Torvalds struct xdr_netobj mic; 1373d8ed029dSAlexey Dobriyan u32 offset; 1374d8ed029dSAlexey Dobriyan __be32 *q; 13751da177e4SLinus Torvalds struct kvec *iov; 13761da177e4SLinus Torvalds u32 maj_stat = 0; 13771da177e4SLinus Torvalds int status = -EIO; 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds integ_len = p++; 13801da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13811da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13821da177e4SLinus Torvalds 13839f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13861da177e4SLinus Torvalds offset, snd_buf->len - offset)) 13871da177e4SLinus Torvalds return status; 13881da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 13911da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13921da177e4SLinus Torvalds iov = snd_buf->tail; 13931da177e4SLinus Torvalds else 13941da177e4SLinus Torvalds iov = snd_buf->head; 13951da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 13961da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 13971da177e4SLinus Torvalds 139800fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13991da177e4SLinus Torvalds status = -EIO; /* XXX? */ 14001da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1401fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14021da177e4SLinus Torvalds else if (maj_stat) 14031da177e4SLinus Torvalds return status; 14041da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 14051da177e4SLinus Torvalds 14061da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 14071da177e4SLinus Torvalds iov->iov_len += offset; 14081da177e4SLinus Torvalds snd_buf->len += offset; 14091da177e4SLinus Torvalds return 0; 14101da177e4SLinus Torvalds } 14111da177e4SLinus Torvalds 14122d2da60cSJ. Bruce Fields static void 14132d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 14142d2da60cSJ. Bruce Fields { 14152d2da60cSJ. Bruce Fields int i; 14162d2da60cSJ. Bruce Fields 14172d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 14182d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 14192d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 14202d2da60cSJ. Bruce Fields } 14212d2da60cSJ. Bruce Fields 14222d2da60cSJ. Bruce Fields static int 14232d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 14242d2da60cSJ. Bruce Fields { 14252d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14262d2da60cSJ. Bruce Fields int first, last, i; 14272d2da60cSJ. Bruce Fields 14282d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 14292d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 14302d2da60cSJ. Bruce Fields return 0; 14312d2da60cSJ. Bruce Fields } 14322d2da60cSJ. Bruce Fields 14332d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14342d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 14352d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 14362d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 14372d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 14382d2da60cSJ. Bruce Fields GFP_NOFS); 14392d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 14402d2da60cSJ. Bruce Fields goto out; 14412d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 14422d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 14432d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 14442d2da60cSJ. Bruce Fields goto out_free; 14452d2da60cSJ. Bruce Fields } 14462d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 14472d2da60cSJ. Bruce Fields return 0; 14482d2da60cSJ. Bruce Fields out_free: 1449cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1450cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 14512d2da60cSJ. Bruce Fields out: 14522d2da60cSJ. Bruce Fields return -EAGAIN; 14532d2da60cSJ. Bruce Fields } 14542d2da60cSJ. Bruce Fields 14552d2da60cSJ. Bruce Fields static inline int 14562d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14579f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14589f06c719SChuck Lever __be32 *p, void *obj) 14592d2da60cSJ. Bruce Fields { 14602d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14612d2da60cSJ. Bruce Fields u32 offset; 14622d2da60cSJ. Bruce Fields u32 maj_stat; 14632d2da60cSJ. Bruce Fields int status; 1464d8ed029dSAlexey Dobriyan __be32 *opaque_len; 14652d2da60cSJ. Bruce Fields struct page **inpages; 14662d2da60cSJ. Bruce Fields int first; 14672d2da60cSJ. Bruce Fields int pad; 14682d2da60cSJ. Bruce Fields struct kvec *iov; 14692d2da60cSJ. Bruce Fields char *tmp; 14702d2da60cSJ. Bruce Fields 14712d2da60cSJ. Bruce Fields opaque_len = p++; 14722d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14732d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14742d2da60cSJ. Bruce Fields 14759f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14762d2da60cSJ. Bruce Fields 14772d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 14782d2da60cSJ. Bruce Fields if (status) 14792d2da60cSJ. Bruce Fields return status; 14802d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14812d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 14822d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14832d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14847561042fSKevin Coffman /* 14857561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 14867561042fSKevin Coffman * head when wrapping: 14877561042fSKevin Coffman * 14887561042fSKevin Coffman * call_allocate() allocates twice the slack space required 14897561042fSKevin Coffman * by the authentication flavor to rq_callsize. 14907561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14917561042fSKevin Coffman */ 14922d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14932d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14942d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14952d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14962d2da60cSJ. Bruce Fields } 149700fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14987561042fSKevin Coffman /* slack space should prevent this ever happening: */ 14992d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 15002d2da60cSJ. Bruce Fields status = -EIO; 15012d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 15022d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 15032d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1504fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15052d2da60cSJ. Bruce Fields else if (maj_stat) 15062d2da60cSJ. Bruce Fields return status; 15072d2da60cSJ. Bruce Fields 15082d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 15092d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 15102d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 15112d2da60cSJ. Bruce Fields iov = snd_buf->tail; 15122d2da60cSJ. Bruce Fields else 15132d2da60cSJ. Bruce Fields iov = snd_buf->head; 15142d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 15152d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 15162d2da60cSJ. Bruce Fields memset(p, 0, pad); 15172d2da60cSJ. Bruce Fields iov->iov_len += pad; 15182d2da60cSJ. Bruce Fields snd_buf->len += pad; 15192d2da60cSJ. Bruce Fields 15202d2da60cSJ. Bruce Fields return 0; 15212d2da60cSJ. Bruce Fields } 15222d2da60cSJ. Bruce Fields 15231da177e4SLinus Torvalds static int 15241da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 15259f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 15261da177e4SLinus Torvalds { 1527a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15281da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15291da177e4SLinus Torvalds gc_base); 15301da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 15311da177e4SLinus Torvalds int status = -EIO; 15321da177e4SLinus Torvalds 1533632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 15341da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 15351da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 15361da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 15371da177e4SLinus Torvalds */ 15389f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15399f06c719SChuck Lever status = 0; 15401da177e4SLinus Torvalds goto out; 15411da177e4SLinus Torvalds } 15421da177e4SLinus Torvalds switch (gss_cred->gc_service) { 15431da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 15449f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15459f06c719SChuck Lever status = 0; 15461da177e4SLinus Torvalds break; 15471da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 154889f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 15491da177e4SLinus Torvalds break; 15501da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 155189f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 15521da177e4SLinus Torvalds break; 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds out: 15551da177e4SLinus Torvalds gss_put_ctx(ctx); 1556632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15571da177e4SLinus Torvalds return status; 15581da177e4SLinus Torvalds } 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds static inline int 15611da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1562d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15631da177e4SLinus Torvalds { 15641da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15651da177e4SLinus Torvalds struct xdr_buf integ_buf; 15661da177e4SLinus Torvalds struct xdr_netobj mic; 15671da177e4SLinus Torvalds u32 data_offset, mic_offset; 15681da177e4SLinus Torvalds u32 integ_len; 15691da177e4SLinus Torvalds u32 maj_stat; 15701da177e4SLinus Torvalds int status = -EIO; 15711da177e4SLinus Torvalds 15721da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 15731da177e4SLinus Torvalds if (integ_len & 3) 15741da177e4SLinus Torvalds return status; 15751da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15761da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 15771da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 15781da177e4SLinus Torvalds return status; 15791da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15801da177e4SLinus Torvalds return status; 15811da177e4SLinus Torvalds 15821da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15831da177e4SLinus Torvalds mic_offset - data_offset)) 15841da177e4SLinus Torvalds return status; 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15871da177e4SLinus Torvalds return status; 15881da177e4SLinus Torvalds 158900fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15901da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1591fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15921da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15931da177e4SLinus Torvalds return status; 15941da177e4SLinus Torvalds return 0; 15951da177e4SLinus Torvalds } 15961da177e4SLinus Torvalds 15972d2da60cSJ. Bruce Fields static inline int 15982d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1599d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 16002d2da60cSJ. Bruce Fields { 16012d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 16022d2da60cSJ. Bruce Fields u32 offset; 16032d2da60cSJ. Bruce Fields u32 opaque_len; 16042d2da60cSJ. Bruce Fields u32 maj_stat; 16052d2da60cSJ. Bruce Fields int status = -EIO; 16062d2da60cSJ. Bruce Fields 16072d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 16082d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 16092d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 16102d2da60cSJ. Bruce Fields return status; 16112d2da60cSJ. Bruce Fields /* remove padding: */ 16122d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 16132d2da60cSJ. Bruce Fields 161400fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 16152d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1616fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 16172d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 16182d2da60cSJ. Bruce Fields return status; 16192d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 16202d2da60cSJ. Bruce Fields return status; 16212d2da60cSJ. Bruce Fields 16222d2da60cSJ. Bruce Fields return 0; 16232d2da60cSJ. Bruce Fields } 16242d2da60cSJ. Bruce Fields 1625bf269551SChuck Lever static int 1626bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1627bf269551SChuck Lever __be32 *p, void *obj) 1628bf269551SChuck Lever { 1629bf269551SChuck Lever struct xdr_stream xdr; 1630bf269551SChuck Lever 1631bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1632bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1633bf269551SChuck Lever } 16342d2da60cSJ. Bruce Fields 16351da177e4SLinus Torvalds static int 16361da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1637bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 16381da177e4SLinus Torvalds { 1639a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16401da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 16411da177e4SLinus Torvalds gc_base); 16421da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1643d8ed029dSAlexey Dobriyan __be32 *savedp = p; 16442d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 16452d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 16461da177e4SLinus Torvalds int status = -EIO; 16471da177e4SLinus Torvalds 16481da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 16491da177e4SLinus Torvalds goto out_decode; 16501da177e4SLinus Torvalds switch (gss_cred->gc_service) { 16511da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 16521da177e4SLinus Torvalds break; 16531da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 16541da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 16551da177e4SLinus Torvalds if (status) 16561da177e4SLinus Torvalds goto out; 16571da177e4SLinus Torvalds break; 16581da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 16592d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 16602d2da60cSJ. Bruce Fields if (status) 16612d2da60cSJ. Bruce Fields goto out; 16621da177e4SLinus Torvalds break; 16631da177e4SLinus Torvalds } 166424b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16651be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16662d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 16671da177e4SLinus Torvalds out_decode: 1668bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16691da177e4SLinus Torvalds out: 16701da177e4SLinus Torvalds gss_put_ctx(ctx); 1671632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1672632f0d05SChuck Lever task->tk_pid, __func__, status); 16731da177e4SLinus Torvalds return status; 16741da177e4SLinus Torvalds } 16751da177e4SLinus Torvalds 1676f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 16771da177e4SLinus Torvalds .owner = THIS_MODULE, 16781da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16791da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 16801da177e4SLinus Torvalds .create = gss_create, 16811da177e4SLinus Torvalds .destroy = gss_destroy, 16821da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 168380df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 16846a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16859568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 1686a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 16871da177e4SLinus Torvalds }; 16881da177e4SLinus Torvalds 1689f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 16901da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 16911da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1692fba3bad4STrond Myklebust .cr_init = gss_cred_init, 16935c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16941da177e4SLinus Torvalds .crmatch = gss_match, 16951da177e4SLinus Torvalds .crmarshal = gss_marshal, 16961da177e4SLinus Torvalds .crrefresh = gss_refresh, 16971da177e4SLinus Torvalds .crvalidate = gss_validate, 16981da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 16991da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 17001da177e4SLinus Torvalds }; 17011da177e4SLinus Torvalds 17020df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 17030df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 17046dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 17055c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 17060df7fb74STrond Myklebust .crmatch = gss_match, 17070df7fb74STrond Myklebust .crmarshal = gss_marshal, 17080df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 17090df7fb74STrond Myklebust .crvalidate = gss_validate, 17100df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 17110df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 17120df7fb74STrond Myklebust }; 17130df7fb74STrond Myklebust 1714b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1715c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 17161da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 17171da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 171834769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 171934769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 172034769fc4S\"J. Bruce Fields\ }; 172134769fc4S\"J. Bruce Fields\ 1722b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1723c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 172434769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 172534769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 172634769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 17271da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 17281da177e4SLinus Torvalds }; 17291da177e4SLinus Torvalds 1730a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 1731a1db410dSStanislav Kinsbursky { 1732a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 1733a1db410dSStanislav Kinsbursky } 1734a1db410dSStanislav Kinsbursky 1735a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 1736a1db410dSStanislav Kinsbursky { 1737a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 1738a1db410dSStanislav Kinsbursky } 1739a1db410dSStanislav Kinsbursky 1740a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 1741a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 1742a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1743a1db410dSStanislav Kinsbursky }; 1744a1db410dSStanislav Kinsbursky 17451da177e4SLinus Torvalds /* 17461da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 17471da177e4SLinus Torvalds */ 17481da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 17491da177e4SLinus Torvalds { 17501da177e4SLinus Torvalds int err = 0; 17511da177e4SLinus Torvalds 17521da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 17531da177e4SLinus Torvalds if (err) 17541da177e4SLinus Torvalds goto out; 17551da177e4SLinus Torvalds err = gss_svc_init(); 17561da177e4SLinus Torvalds if (err) 17571da177e4SLinus Torvalds goto out_unregister; 1758a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1759a1db410dSStanislav Kinsbursky if (err) 1760a1db410dSStanislav Kinsbursky goto out_svc_exit; 176179a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17621da177e4SLinus Torvalds return 0; 1763a1db410dSStanislav Kinsbursky out_svc_exit: 1764a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 17651da177e4SLinus Torvalds out_unregister: 17661da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 17671da177e4SLinus Torvalds out: 17681da177e4SLinus Torvalds return err; 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 17721da177e4SLinus Torvalds { 1773a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17741da177e4SLinus Torvalds gss_svc_shutdown(); 17751da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 1776bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17771da177e4SLinus Torvalds } 17781da177e4SLinus Torvalds 177971afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 17801da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1781126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 1782126e216aSTrond Myklebust gss_expired_cred_retry_delay, 1783126e216aSTrond Myklebust uint, 0644); 1784126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1785126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 1786126e216aSTrond Myklebust 17871da177e4SLinus Torvalds module_init(init_rpcsec_gss) 17881da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1789