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 741da177e4SLinus Torvalds struct gss_auth { 750285ed1fSTrond Myklebust struct kref kref; 761da177e4SLinus Torvalds struct rpc_auth rpc_auth; 771da177e4SLinus Torvalds struct gss_api_mech *mech; 781da177e4SLinus Torvalds enum rpc_gss_svc service; 791da177e4SLinus Torvalds struct rpc_clnt *client; 8034769fc4S\"J. Bruce Fields\ /* 8134769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 8234769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 8334769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 8434769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 8534769fc4S\"J. Bruce Fields\ */ 86c239d83bSStanislav Kinsbursky struct rpc_pipe *pipe[2]; 87bd4a3eb1STrond Myklebust const char *target_name; 881da177e4SLinus Torvalds }; 891da177e4SLinus Torvalds 9079a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 9179a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 9279a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 9379a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 94cf81939dS\"J. Bruce Fields\ 955d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 96b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 97b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1001da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1011da177e4SLinus Torvalds { 1021da177e4SLinus Torvalds atomic_inc(&ctx->count); 1031da177e4SLinus Torvalds return ctx; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static inline void 1071da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1105d28dc82STrond Myklebust gss_free_ctx(ctx); 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds 1135d28dc82STrond Myklebust /* gss_cred_set_ctx: 1145d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1155d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1169beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1175d28dc82STrond Myklebust */ 1181da177e4SLinus Torvalds static void 1191da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1225d28dc82STrond Myklebust 123cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 124cd019f75STrond Myklebust return; 1257b6962b0STrond Myklebust gss_get_ctx(ctx); 126cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 127fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 128cd019f75STrond Myklebust smp_mb__before_clear_bit(); 129fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds static const void * 1331da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1361da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1371da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1381da177e4SLinus Torvalds memcpy(res, p, len); 1391da177e4SLinus Torvalds return q; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static inline const void * 1431da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds const void *q; 1461da177e4SLinus Torvalds unsigned int len; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1491da177e4SLinus Torvalds if (IS_ERR(p)) 1501da177e4SLinus Torvalds return p; 1511da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1521da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1531da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1540f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1551da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1561da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1571da177e4SLinus Torvalds dest->len = len; 1581da177e4SLinus Torvalds return q; 1591da177e4SLinus Torvalds } 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds static struct gss_cl_ctx * 1621da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1631da177e4SLinus Torvalds { 1641da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1651da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1661da177e4SLinus Torvalds 1675d28dc82STrond Myklebust rcu_read_lock(); 1681da177e4SLinus Torvalds if (gss_cred->gc_ctx) 1691da177e4SLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1705d28dc82STrond Myklebust rcu_read_unlock(); 1711da177e4SLinus Torvalds return ctx; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds static struct gss_cl_ctx * 1751da177e4SLinus Torvalds gss_alloc_context(void) 1761da177e4SLinus Torvalds { 1771da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1781da177e4SLinus Torvalds 1790f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1801da177e4SLinus Torvalds if (ctx != NULL) { 1811da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1821da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1831da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1841da177e4SLinus Torvalds atomic_set(&ctx->count,1); 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds return ctx; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1901da177e4SLinus Torvalds static const void * 1911da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1921da177e4SLinus Torvalds { 1931da177e4SLinus Torvalds const void *q; 1941da177e4SLinus Torvalds unsigned int seclen; 1951da177e4SLinus Torvalds unsigned int timeout; 196620038f6SAndy Adamson unsigned long now = jiffies; 1971da177e4SLinus Torvalds u32 window_size; 1981da177e4SLinus Torvalds int ret; 1991da177e4SLinus Torvalds 200620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 201620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 202620038f6SAndy Adamson * the -t value passed to GSSD. 203620038f6SAndy Adamson */ 2041da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2051da177e4SLinus Torvalds if (IS_ERR(p)) 2061da177e4SLinus Torvalds goto err; 2071da177e4SLinus Torvalds if (timeout == 0) 2081da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 209620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 210620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 211620038f6SAndy Adamson * simultaneous requests 212620038f6SAndy Adamson */ 2131da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2141da177e4SLinus Torvalds if (IS_ERR(p)) 2151da177e4SLinus Torvalds goto err; 2161da177e4SLinus Torvalds ctx->gc_win = window_size; 2171da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2181da177e4SLinus Torvalds if (ctx->gc_win == 0) { 219dc5ddce9SJeff Layton /* 220dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 221dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 222dc5ddce9SJeff Layton */ 223dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 224dc5ddce9SJeff Layton if (!IS_ERR(p)) 225dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 226dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2271da177e4SLinus Torvalds goto err; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds /* copy the opaque wire context */ 2301da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2311da177e4SLinus Torvalds if (IS_ERR(p)) 2321da177e4SLinus Torvalds goto err; 2331da177e4SLinus Torvalds /* import the opaque security context */ 2341da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2351da177e4SLinus Torvalds if (IS_ERR(p)) 2361da177e4SLinus Torvalds goto err; 2371da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2381da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2391da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2401da177e4SLinus Torvalds goto err; 2411da177e4SLinus Torvalds } 242400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2431da177e4SLinus Torvalds if (ret < 0) { 2441da177e4SLinus Torvalds p = ERR_PTR(ret); 2451da177e4SLinus Torvalds goto err; 2461da177e4SLinus Torvalds } 247620038f6SAndy Adamson dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", 248620038f6SAndy Adamson __func__, ctx->gc_expiry, now, timeout); 2491da177e4SLinus Torvalds return q; 2501da177e4SLinus Torvalds err: 251173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2521da177e4SLinus Torvalds return p; 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds 25534769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds struct gss_upcall_msg { 2581da177e4SLinus Torvalds atomic_t count; 2597eaf040bSEric W. Biederman kuid_t uid; 2601da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2611da177e4SLinus Torvalds struct list_head list; 2621da177e4SLinus Torvalds struct gss_auth *auth; 2639beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2641da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2651da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2661da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 26734769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2681da177e4SLinus Torvalds }; 2691da177e4SLinus Torvalds 2702aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 27179a3f20bS\"J. Bruce Fields\ { 2722aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 27379a3f20bS\"J. Bruce Fields\ int ret; 27479a3f20bS\"J. Bruce Fields\ 27579a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 2762aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 2772aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 2782aed8b47STrond Myklebust ret = sn->pipe_version; 27979a3f20bS\"J. Bruce Fields\ } else 28079a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 28179a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28279a3f20bS\"J. Bruce Fields\ return ret; 28379a3f20bS\"J. Bruce Fields\ } 28479a3f20bS\"J. Bruce Fields\ 2852aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 28679a3f20bS\"J. Bruce Fields\ { 2872aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 2882aed8b47STrond Myklebust 2892aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 2902aed8b47STrond Myklebust sn->pipe_version = -1; 29179a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 29279a3f20bS\"J. Bruce Fields\ } 29379a3f20bS\"J. Bruce Fields\ } 29479a3f20bS\"J. Bruce Fields\ 2951da177e4SLinus Torvalds static void 2961da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 2971da177e4SLinus Torvalds { 2982aed8b47STrond Myklebust struct net *net = rpc_net_ns(gss_msg->auth->client); 2991da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 3001da177e4SLinus Torvalds return; 3012aed8b47STrond Myklebust put_pipe_version(net); 3021da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3031da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3041da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 305f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3061da177e4SLinus Torvalds kfree(gss_msg); 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds static struct gss_upcall_msg * 3107eaf040bSEric W. Biederman __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3111da177e4SLinus Torvalds { 3121da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3139beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3140b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3151da177e4SLinus Torvalds continue; 3161da177e4SLinus Torvalds atomic_inc(&pos->count); 317632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3181da177e4SLinus Torvalds return pos; 3191da177e4SLinus Torvalds } 320632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3211da177e4SLinus Torvalds return NULL; 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 324720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3251da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3261da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3271da177e4SLinus Torvalds */ 3281da177e4SLinus Torvalds static inline struct gss_upcall_msg * 329053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3301da177e4SLinus Torvalds { 3319beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3321da177e4SLinus Torvalds struct gss_upcall_msg *old; 3331da177e4SLinus Torvalds 3349beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3359beae467SStanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3361da177e4SLinus Torvalds if (old == NULL) { 3371da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3389beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3391da177e4SLinus Torvalds } else 3401da177e4SLinus Torvalds gss_msg = old; 3419beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3421da177e4SLinus Torvalds return gss_msg; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds static void 3461da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3491da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3501da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3511da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds static void 3551da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3561da177e4SLinus Torvalds { 3579beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3581da177e4SLinus Torvalds 3593b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3603b68aaeaSTrond Myklebust return; 3619beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3623b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3631da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3649beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds static void 368126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 369126e216aSTrond Myklebust { 370126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 371126e216aSTrond Myklebust case 0: 372126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 373126e216aSTrond Myklebust break; 374126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 375126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 376126e216aSTrond Myklebust break; 377126e216aSTrond Myklebust case -EKEYEXPIRED: 378126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 379126e216aSTrond Myklebust } 380126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 381126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 382126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 383126e216aSTrond Myklebust } 384126e216aSTrond Myklebust 385126e216aSTrond Myklebust static void 3861da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 3871da177e4SLinus Torvalds { 388a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 3891da177e4SLinus Torvalds struct gss_cred, gc_base); 3901da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3919beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3921da177e4SLinus Torvalds 3939beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 394126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 3959beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 396126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 3971da177e4SLinus Torvalds gss_release_msg(gss_msg); 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 40034769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 40134769fc4S\"J. Bruce Fields\ { 40290602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 40390602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 40490602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 40590602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 40690602c7bSEric W. Biederman BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); 40734769fc4S\"J. Bruce Fields\ } 40834769fc4S\"J. Bruce Fields\ 4098b1c7bf5SOlga Kornievskaia static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 410bd4a3eb1STrond Myklebust const char *service_name, 411bd4a3eb1STrond Myklebust const char *target_name) 41234769fc4S\"J. Bruce Fields\ { 413683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4148b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4158b1c7bf5SOlga Kornievskaia int len = 0; 4168b1c7bf5SOlga Kornievskaia 4178b1c7bf5SOlga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 418683ac665STrond Myklebust mech->gm_name, 41990602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4208b1c7bf5SOlga Kornievskaia p += gss_msg->msg.len; 421bd4a3eb1STrond Myklebust if (target_name) { 422bd4a3eb1STrond Myklebust len = sprintf(p, "target=%s ", target_name); 4238b1c7bf5SOlga Kornievskaia p += len; 4248b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4258b1c7bf5SOlga Kornievskaia } 42668c97153STrond Myklebust if (service_name != NULL) { 42768c97153STrond Myklebust len = sprintf(p, "service=%s ", service_name); 4282efef708SOlga Kornievskaia p += len; 4292efef708SOlga Kornievskaia gss_msg->msg.len += len; 4302efef708SOlga Kornievskaia } 431683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 432f8628220SKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 433683ac665STrond Myklebust p += len; 434683ac665STrond Myklebust gss_msg->msg.len += len; 435683ac665STrond Myklebust } 4368b1c7bf5SOlga Kornievskaia len = sprintf(p, "\n"); 4378b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4388b1c7bf5SOlga Kornievskaia 43934769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 44034769fc4S\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 44134769fc4S\"J. Bruce Fields\ } 44234769fc4S\"J. Bruce Fields\ 44368c97153STrond Myklebust static struct gss_upcall_msg * 44468c97153STrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt, 4457eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4461da177e4SLinus Torvalds { 4471da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 44879a3f20bS\"J. Bruce Fields\ int vers; 4491da177e4SLinus Torvalds 4500f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 451db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 452db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 4532aed8b47STrond Myklebust vers = get_pipe_version(rpc_net_ns(clnt)); 45479a3f20bS\"J. Bruce Fields\ if (vers < 0) { 45579a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 45679a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 45779a3f20bS\"J. Bruce Fields\ } 458c239d83bSStanislav Kinsbursky gss_msg->pipe = gss_auth->pipe[vers]; 4591da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 4601da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 4611da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 4621da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 4631da177e4SLinus Torvalds gss_msg->uid = uid; 4641da177e4SLinus Torvalds gss_msg->auth = gss_auth; 465bd4a3eb1STrond Myklebust switch (vers) { 466bd4a3eb1STrond Myklebust case 0: 467bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 468bd4a3eb1STrond Myklebust default: 469bd4a3eb1STrond Myklebust gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 470bd4a3eb1STrond Myklebust }; 4711da177e4SLinus Torvalds return gss_msg; 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds static struct gss_upcall_msg * 4751da177e4SLinus Torvalds gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 4761da177e4SLinus Torvalds { 4777c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4787c67db3aSTrond Myklebust struct gss_cred, gc_base); 4791da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4807eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 4811da177e4SLinus Torvalds 48268c97153STrond Myklebust gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal); 483db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 484db75b3d6S\"J. Bruce Fields\ return gss_new; 485053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 4861da177e4SLinus Torvalds if (gss_msg == gss_new) { 4879beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4881da177e4SLinus Torvalds if (res) { 4891da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4901da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds } else 4931da177e4SLinus Torvalds gss_release_msg(gss_new); 4941da177e4SLinus Torvalds return gss_msg; 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds 497b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 498b03568c3S\"J. Bruce Fields\ { 499b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 500b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 501b03568c3S\"J. Bruce Fields\ 502b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 503b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 504b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 505b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 506b03568c3S\"J. Bruce Fields\ } 507b03568c3S\"J. Bruce Fields\ } 508b03568c3S\"J. Bruce Fields\ 5091da177e4SLinus Torvalds static inline int 5101da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5111da177e4SLinus Torvalds { 512a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5134a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5141da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5151da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5161da177e4SLinus Torvalds struct gss_cred, gc_base); 5171da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5189beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5191da177e4SLinus Torvalds int err = 0; 5201da177e4SLinus Torvalds 521632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 522cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 5231da177e4SLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 524480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 52579a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 52679a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 52779a3f20bS\"J. Bruce Fields\ warn_gssd(); 52879a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 52979a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 530d1a8016aSBryan Schumaker return -EAGAIN; 53179a3f20bS\"J. Bruce Fields\ } 5321da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5331da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5341da177e4SLinus Torvalds goto out; 5351da177e4SLinus Torvalds } 5369beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5379beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5381da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5395d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 540126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5411da177e4SLinus Torvalds task->tk_timeout = 0; 5421da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5431da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5441da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5455d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 546126e216aSTrond Myklebust } else { 547126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5481da177e4SLinus Torvalds err = gss_msg->msg.errno; 549126e216aSTrond Myklebust } 5509beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5511da177e4SLinus Torvalds gss_release_msg(gss_msg); 5521da177e4SLinus Torvalds out: 553632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 554cdba321eSEric W. Biederman task->tk_pid, __func__, 555cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 5561da177e4SLinus Torvalds return err; 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds static inline int 5601da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5611da177e4SLinus Torvalds { 562abfdbd53STrond Myklebust struct net *net = rpc_net_ns(gss_auth->client); 563abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 5649beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5651da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5661da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 567abfdbd53STrond Myklebust unsigned long timeout; 5681da177e4SLinus Torvalds DEFINE_WAIT(wait); 569d36ccb9cSTrond Myklebust int err; 5701da177e4SLinus Torvalds 571cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 572cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 57379a3f20bS\"J. Bruce Fields\ retry: 574d36ccb9cSTrond Myklebust err = 0; 575abfdbd53STrond Myklebust /* Default timeout is 15s unless we know that gssd is not running */ 576abfdbd53STrond Myklebust timeout = 15 * HZ; 577abfdbd53STrond Myklebust if (!sn->gssd_running) 578abfdbd53STrond Myklebust timeout = HZ >> 2; 5791da177e4SLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 58079a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 58179a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 5822aed8b47STrond Myklebust sn->pipe_version >= 0, timeout); 5832aed8b47STrond Myklebust if (sn->pipe_version < 0) { 584abfdbd53STrond Myklebust if (err == 0) 585abfdbd53STrond Myklebust sn->gssd_running = 0; 586d1a8016aSBryan Schumaker warn_gssd(); 587d1a8016aSBryan Schumaker err = -EACCES; 588d1a8016aSBryan Schumaker } 589d36ccb9cSTrond Myklebust if (err < 0) 59079a3f20bS\"J. Bruce Fields\ goto out; 59179a3f20bS\"J. Bruce Fields\ goto retry; 59279a3f20bS\"J. Bruce Fields\ } 5931da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5941da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5951da177e4SLinus Torvalds goto out; 5961da177e4SLinus Torvalds } 5979beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5981da177e4SLinus Torvalds for (;;) { 5995afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6009beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6011da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6021da177e4SLinus Torvalds break; 6031da177e4SLinus Torvalds } 6049beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6055afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6061da177e4SLinus Torvalds err = -ERESTARTSYS; 6071da177e4SLinus Torvalds goto out_intr; 6081da177e4SLinus Torvalds } 6091da177e4SLinus Torvalds schedule(); 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds if (gss_msg->ctx) 6127b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6131da177e4SLinus Torvalds else 6141da177e4SLinus Torvalds err = gss_msg->msg.errno; 6159beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6161da177e4SLinus Torvalds out_intr: 6171da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6181da177e4SLinus Torvalds gss_release_msg(gss_msg); 6191da177e4SLinus Torvalds out: 620632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 621cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6221da177e4SLinus Torvalds return err; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds static ssize_t 6281da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds const void *p, *end; 6311da177e4SLinus Torvalds void *buf; 6321da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 633496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6341da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 63590602c7bSEric W. Biederman uid_t id; 63690602c7bSEric W. Biederman kuid_t uid; 6373b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6401da177e4SLinus Torvalds goto out; 6411da177e4SLinus Torvalds err = -ENOMEM; 6420f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6431da177e4SLinus Torvalds if (!buf) 6441da177e4SLinus Torvalds goto out; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds err = -EFAULT; 6471da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6481da177e4SLinus Torvalds goto err; 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 65190602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6521da177e4SLinus Torvalds if (IS_ERR(p)) { 6531da177e4SLinus Torvalds err = PTR_ERR(p); 6541da177e4SLinus Torvalds goto err; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 65790602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 65890602c7bSEric W. Biederman if (!uid_valid(uid)) { 65990602c7bSEric W. Biederman err = -EINVAL; 66090602c7bSEric W. Biederman goto err; 66190602c7bSEric W. Biederman } 66290602c7bSEric W. Biederman 6631da177e4SLinus Torvalds err = -ENOMEM; 6641da177e4SLinus Torvalds ctx = gss_alloc_context(); 6651da177e4SLinus Torvalds if (ctx == NULL) 6661da177e4SLinus Torvalds goto err; 6673b68aaeaSTrond Myklebust 6683b68aaeaSTrond Myklebust err = -ENOENT; 6693b68aaeaSTrond Myklebust /* Find a matching upcall */ 6709beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6719beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6723b68aaeaSTrond Myklebust if (gss_msg == NULL) { 6739beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6743b68aaeaSTrond Myklebust goto err_put_ctx; 6753b68aaeaSTrond Myklebust } 6763b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 6779beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6783b68aaeaSTrond Myklebust 6796e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6801da177e4SLinus Torvalds if (IS_ERR(p)) { 6811da177e4SLinus Torvalds err = PTR_ERR(p); 682486bad2eSJeff Layton switch (err) { 683486bad2eSJeff Layton case -EACCES: 684dc5ddce9SJeff Layton case -EKEYEXPIRED: 685486bad2eSJeff Layton gss_msg->msg.errno = err; 686486bad2eSJeff Layton err = mlen; 687486bad2eSJeff Layton break; 688486bad2eSJeff Layton case -EFAULT: 689486bad2eSJeff Layton case -ENOMEM: 690486bad2eSJeff Layton case -EINVAL: 691486bad2eSJeff Layton case -ENOSYS: 692486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 693486bad2eSJeff Layton break; 694486bad2eSJeff Layton default: 695486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 6966c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 697486bad2eSJeff Layton BUG(); 698486bad2eSJeff Layton } 6993b68aaeaSTrond Myklebust goto err_release_msg; 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7023b68aaeaSTrond Myklebust err = mlen; 7033b68aaeaSTrond Myklebust 7043b68aaeaSTrond Myklebust err_release_msg: 7059beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7061da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7079beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7081da177e4SLinus Torvalds gss_release_msg(gss_msg); 7091da177e4SLinus Torvalds err_put_ctx: 7101da177e4SLinus Torvalds gss_put_ctx(ctx); 7111da177e4SLinus Torvalds err: 7121da177e4SLinus Torvalds kfree(buf); 7131da177e4SLinus Torvalds out: 714632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7151da177e4SLinus Torvalds return err; 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds 71834769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 719cf81939dS\"J. Bruce Fields\ { 7202aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7212aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 72234769fc4S\"J. Bruce Fields\ int ret = 0; 72334769fc4S\"J. Bruce Fields\ 72479a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 7252aed8b47STrond Myklebust if (sn->pipe_version < 0) { 72634769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 7272aed8b47STrond Myklebust sn->pipe_version = new_version; 72879a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 72979a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 7302aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 73134769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 73234769fc4S\"J. Bruce Fields\ ret = -EBUSY; 73334769fc4S\"J. Bruce Fields\ goto out; 73479a3f20bS\"J. Bruce Fields\ } 7352aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 73634769fc4S\"J. Bruce Fields\ out: 73779a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 73834769fc4S\"J. Bruce Fields\ return ret; 73934769fc4S\"J. Bruce Fields\ 74034769fc4S\"J. Bruce Fields\ } 74134769fc4S\"J. Bruce Fields\ 74234769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 74334769fc4S\"J. Bruce Fields\ { 74434769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 74534769fc4S\"J. Bruce Fields\ } 74634769fc4S\"J. Bruce Fields\ 74734769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 74834769fc4S\"J. Bruce Fields\ { 74934769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 750cf81939dS\"J. Bruce Fields\ } 751cf81939dS\"J. Bruce Fields\ 7521da177e4SLinus Torvalds static void 7531da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 7541da177e4SLinus Torvalds { 7552aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7569beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7571da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 7581da177e4SLinus Torvalds 7595a67657aSTrond Myklebust restart: 7609beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7619beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7626e84c7b6STrond Myklebust 7635a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7645a67657aSTrond Myklebust continue; 7651da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 7661da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7671da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7689beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7691da177e4SLinus Torvalds gss_release_msg(gss_msg); 7705a67657aSTrond Myklebust goto restart; 7711da177e4SLinus Torvalds } 7729beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 773cf81939dS\"J. Bruce Fields\ 7742aed8b47STrond Myklebust put_pipe_version(net); 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds static void 7781da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7791da177e4SLinus Torvalds { 7801da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds if (msg->errno < 0) { 783632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 784632f0d05SChuck Lever __func__, gss_msg); 7851da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7861da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 787b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 788b03568c3S\"J. Bruce Fields\ warn_gssd(); 7891da177e4SLinus Torvalds gss_release_msg(gss_msg); 7901da177e4SLinus Torvalds } 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 793ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy(struct rpc_auth *auth) 794ccdc28f8SStanislav Kinsbursky { 795ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 796ccdc28f8SStanislav Kinsbursky 797ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 79880df9d20SStanislav Kinsbursky if (gss_auth->pipe[0]->dentry) 799ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[0]->dentry); 80080df9d20SStanislav Kinsbursky if (gss_auth->pipe[1]->dentry) 801ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 802ccdc28f8SStanislav Kinsbursky } 803ccdc28f8SStanislav Kinsbursky 804ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create(struct rpc_auth *auth) 805ccdc28f8SStanislav Kinsbursky { 806ccdc28f8SStanislav Kinsbursky int err; 807ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 808ccdc28f8SStanislav Kinsbursky struct rpc_clnt *clnt; 809ccdc28f8SStanislav Kinsbursky 810ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 811ccdc28f8SStanislav Kinsbursky clnt = gss_auth->client; 812ccdc28f8SStanislav Kinsbursky 81330507f58SStanislav Kinsbursky gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 814ccdc28f8SStanislav Kinsbursky "gssd", 815ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[1]); 816ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1]->dentry)) 817ccdc28f8SStanislav Kinsbursky return PTR_ERR(gss_auth->pipe[1]->dentry); 81830507f58SStanislav Kinsbursky gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 819ccdc28f8SStanislav Kinsbursky gss_auth->mech->gm_name, 820ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[0]); 821ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0]->dentry)) { 822ccdc28f8SStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]->dentry); 823ccdc28f8SStanislav Kinsbursky goto err_unlink_pipe_1; 824ccdc28f8SStanislav Kinsbursky } 825ccdc28f8SStanislav Kinsbursky return 0; 826ccdc28f8SStanislav Kinsbursky 827ccdc28f8SStanislav Kinsbursky err_unlink_pipe_1: 828ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 829ccdc28f8SStanislav Kinsbursky return err; 830ccdc28f8SStanislav Kinsbursky } 831ccdc28f8SStanislav Kinsbursky 832ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, 833ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 834ccdc28f8SStanislav Kinsbursky { 8352446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 836ccdc28f8SStanislav Kinsbursky struct super_block *sb; 837ccdc28f8SStanislav Kinsbursky 838ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 839ccdc28f8SStanislav Kinsbursky if (sb) { 84030507f58SStanislav Kinsbursky if (clnt->cl_dentry) 841ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy(auth); 842ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 843ccdc28f8SStanislav Kinsbursky } 844ccdc28f8SStanislav Kinsbursky } 845ccdc28f8SStanislav Kinsbursky 846ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, 847ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 848ccdc28f8SStanislav Kinsbursky { 8492446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 850ccdc28f8SStanislav Kinsbursky struct super_block *sb; 851ccdc28f8SStanislav Kinsbursky int err = 0; 852ccdc28f8SStanislav Kinsbursky 853ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 854ccdc28f8SStanislav Kinsbursky if (sb) { 85530507f58SStanislav Kinsbursky if (clnt->cl_dentry) 856ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create(auth); 857ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 858ccdc28f8SStanislav Kinsbursky } 859ccdc28f8SStanislav Kinsbursky return err; 860ccdc28f8SStanislav Kinsbursky } 861ccdc28f8SStanislav Kinsbursky 8621da177e4SLinus Torvalds /* 8631da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 8641da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8651da177e4SLinus Torvalds */ 8661da177e4SLinus Torvalds static struct rpc_auth * 867c2190661STrond Myklebust gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 8681da177e4SLinus Torvalds { 869c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 8701da177e4SLinus Torvalds struct gss_auth *gss_auth; 8711da177e4SLinus Torvalds struct rpc_auth * auth; 8726a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 8776a19275aSJ. Bruce Fields return ERR_PTR(err); 8781da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8791da177e4SLinus Torvalds goto out_dec; 880bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 881c2190661STrond Myklebust if (args->target_name) { 882c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 883bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 884bd4a3eb1STrond Myklebust goto err_free; 885bd4a3eb1STrond Myklebust } 8861da177e4SLinus Torvalds gss_auth->client = clnt; 8876a19275aSJ. Bruce Fields err = -EINVAL; 8881da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 8891da177e4SLinus Torvalds if (!gss_auth->mech) { 8909b1d75b7STrond Myklebust dprintk("RPC: Pseudoflavor %d not found!\n", flavor); 8911da177e4SLinus Torvalds goto err_free; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 894438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 895438b6fdeSJ. Bruce Fields goto err_put_mech; 8961da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 8971da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 8981da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 8991da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 9001da177e4SLinus Torvalds auth->au_flavor = flavor; 9011da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 9020285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 9031da177e4SLinus Torvalds 90434769fc4S\"J. Bruce Fields\ /* 90534769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 90634769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 90734769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 90834769fc4S\"J. Bruce Fields\ * the new pipe first. 90934769fc4S\"J. Bruce Fields\ */ 910c239d83bSStanislav Kinsbursky gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1, 91134769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 912c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1])) { 913c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[1]); 9141da177e4SLinus Torvalds goto err_put_mech; 9156a19275aSJ. Bruce Fields } 9161da177e4SLinus Torvalds 917c239d83bSStanislav Kinsbursky gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0, 91834769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 919c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0])) { 920c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]); 921c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 922c239d83bSStanislav Kinsbursky } 923ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create_net(clnt, auth); 924ccdc28f8SStanislav Kinsbursky if (err) 925c239d83bSStanislav Kinsbursky goto err_destroy_pipe_0; 926f5c2187cSTrond Myklebust err = rpcauth_init_credcache(auth); 92707a2bf1dSTrond Myklebust if (err) 928ccdc28f8SStanislav Kinsbursky goto err_unlink_pipes; 92907a2bf1dSTrond Myklebust 9301da177e4SLinus Torvalds return auth; 931ccdc28f8SStanislav Kinsbursky err_unlink_pipes: 932ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(clnt, auth); 933c239d83bSStanislav Kinsbursky err_destroy_pipe_0: 934c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 935c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 936c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9371da177e4SLinus Torvalds err_put_mech: 9381da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 9391da177e4SLinus Torvalds err_free: 940bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 9411da177e4SLinus Torvalds kfree(gss_auth); 9421da177e4SLinus Torvalds out_dec: 9431da177e4SLinus Torvalds module_put(THIS_MODULE); 9446a19275aSJ. Bruce Fields return ERR_PTR(err); 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds 9471da177e4SLinus Torvalds static void 9480285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 9490285ed1fSTrond Myklebust { 950ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); 951c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 952c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9530285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 954bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 9550285ed1fSTrond Myklebust 9560285ed1fSTrond Myklebust kfree(gss_auth); 9570285ed1fSTrond Myklebust module_put(THIS_MODULE); 9580285ed1fSTrond Myklebust } 9590285ed1fSTrond Myklebust 9600285ed1fSTrond Myklebust static void 9610285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 9620285ed1fSTrond Myklebust { 9630285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9640285ed1fSTrond Myklebust 9650285ed1fSTrond Myklebust gss_free(gss_auth); 9660285ed1fSTrond Myklebust } 9670285ed1fSTrond Myklebust 9680285ed1fSTrond Myklebust static void 9691da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 9701da177e4SLinus Torvalds { 9711da177e4SLinus Torvalds struct gss_auth *gss_auth; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9741da177e4SLinus Torvalds auth, auth->au_flavor); 9751da177e4SLinus Torvalds 9763ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 9773ab9bb72STrond Myklebust 9781da177e4SLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 9790285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9820df7fb74STrond Myklebust /* 9830df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 9840df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 9850df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 9860df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 9870df7fb74STrond Myklebust */ 9880df7fb74STrond Myklebust static int 9890df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 9900df7fb74STrond Myklebust { 9910df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 9920df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 9930df7fb74STrond Myklebust struct rpc_task *task; 9940df7fb74STrond Myklebust 9950df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 9966dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 9970df7fb74STrond Myklebust return 0; 9980df7fb74STrond Myklebust 9990df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 10000df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 10010df7fb74STrond Myklebust 10020df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 10030df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 10040df7fb74STrond Myklebust get_rpccred(cred); 10050df7fb74STrond Myklebust 1006080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 10070df7fb74STrond Myklebust if (!IS_ERR(task)) 10080df7fb74STrond Myklebust rpc_put_task(task); 10090df7fb74STrond Myklebust 10100df7fb74STrond Myklebust put_rpccred(cred); 10110df7fb74STrond Myklebust return 1; 10120df7fb74STrond Myklebust } 10130df7fb74STrond Myklebust 10140df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 10151da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 10161da177e4SLinus Torvalds * allocated before freeing them. */ 10171da177e4SLinus Torvalds static void 10185d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 10191da177e4SLinus Torvalds { 1020632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 10211da177e4SLinus Torvalds 10220d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 10231da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 10241da177e4SLinus Torvalds kfree(ctx); 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds static void 10285d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 10295d28dc82STrond Myklebust { 10305d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 10315d28dc82STrond Myklebust gss_do_free_ctx(ctx); 10325d28dc82STrond Myklebust } 10335d28dc82STrond Myklebust 10345d28dc82STrond Myklebust static void 10355d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 10365d28dc82STrond Myklebust { 10375d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10385d28dc82STrond Myklebust } 10395d28dc82STrond Myklebust 10405d28dc82STrond Myklebust static void 104131be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 10421da177e4SLinus Torvalds { 1043632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 104431be5bf1STrond Myklebust kfree(gss_cred); 104531be5bf1STrond Myklebust } 10461da177e4SLinus Torvalds 104731be5bf1STrond Myklebust static void 104831be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 104931be5bf1STrond Myklebust { 105031be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 105131be5bf1STrond Myklebust gss_free_cred(gss_cred); 105231be5bf1STrond Myklebust } 10531da177e4SLinus Torvalds 105431be5bf1STrond Myklebust static void 10556dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 105631be5bf1STrond Myklebust { 10575d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10580285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10595d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10605d28dc82STrond Myklebust 1061a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 106231be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10635d28dc82STrond Myklebust if (ctx) 10645d28dc82STrond Myklebust gss_put_ctx(ctx); 10650285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds 10686dcd3926SJeff Layton static void 10696dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 10706dcd3926SJeff Layton { 10716dcd3926SJeff Layton 10726dcd3926SJeff Layton if (gss_destroying_context(cred)) 10736dcd3926SJeff Layton return; 10746dcd3926SJeff Layton gss_destroy_nullcred(cred); 10756dcd3926SJeff Layton } 10766dcd3926SJeff Layton 10771da177e4SLinus Torvalds /* 10781da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 10791da177e4SLinus Torvalds */ 10801da177e4SLinus Torvalds static struct rpc_cred * 10818a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10821da177e4SLinus Torvalds { 10838a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds static struct rpc_cred * 10878a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10881da177e4SLinus Torvalds { 10891da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 10901da177e4SLinus Torvalds struct gss_cred *cred = NULL; 10911da177e4SLinus Torvalds int err = -ENOMEM; 10921da177e4SLinus Torvalds 1093632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1094cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1095cdba321eSEric W. Biederman auth->au_flavor); 10961da177e4SLinus Torvalds 10970f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 10981da177e4SLinus Torvalds goto out_err; 10991da177e4SLinus Torvalds 11005fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 11011da177e4SLinus Torvalds /* 11021da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 11031da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 11041da177e4SLinus Torvalds */ 1105fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 11061da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 110768c97153STrond Myklebust cred->gc_principal = NULL; 110868c97153STrond Myklebust if (acred->machine_cred) 110968c97153STrond Myklebust cred->gc_principal = acred->principal; 11100285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 11111da177e4SLinus Torvalds return &cred->gc_base; 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds out_err: 1114632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 11151da177e4SLinus Torvalds return ERR_PTR(err); 11161da177e4SLinus Torvalds } 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds static int 1119fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1120fba3bad4STrond Myklebust { 1121fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1122fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1123fba3bad4STrond Myklebust int err; 1124fba3bad4STrond Myklebust 1125fba3bad4STrond Myklebust do { 1126fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1127fba3bad4STrond Myklebust } while (err == -EAGAIN); 1128fba3bad4STrond Myklebust return err; 1129fba3bad4STrond Myklebust } 1130fba3bad4STrond Myklebust 1131fba3bad4STrond Myklebust static int 11328a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11351da177e4SLinus Torvalds 1136cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11378a317760STrond Myklebust goto out; 11381da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1139cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1140cd019f75STrond Myklebust return 0; 1141cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11421da177e4SLinus Torvalds return 0; 11438a317760STrond Myklebust out: 114468c97153STrond Myklebust if (acred->principal != NULL) { 114568c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 114668c97153STrond Myklebust return 0; 114768c97153STrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 114868c97153STrond Myklebust } 114968c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 11507c67db3aSTrond Myklebust return 0; 11510b4d51b0SEric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11521da177e4SLinus Torvalds } 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds /* 11551da177e4SLinus Torvalds * Marshal credentials. 11561da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 11571da177e4SLinus Torvalds */ 1158d8ed029dSAlexey Dobriyan static __be32 * 1159d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 11601da177e4SLinus Torvalds { 1161a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1162a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 11631da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11641da177e4SLinus Torvalds gc_base); 11651da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1166d8ed029dSAlexey Dobriyan __be32 *cred_len; 11671da177e4SLinus Torvalds u32 maj_stat = 0; 11681da177e4SLinus Torvalds struct xdr_netobj mic; 11691da177e4SLinus Torvalds struct kvec iov; 11701da177e4SLinus Torvalds struct xdr_buf verf_buf; 11711da177e4SLinus Torvalds 1172632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11751da177e4SLinus Torvalds cred_len = p++; 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 11781da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 11791da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 11821da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 11831da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 11841da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 11851da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 11861da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 11891da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1190a4f0835cSTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1191808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 11921da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 11931da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvalds /* set verifier flavor*/ 11961da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 119900fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 12001da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1201fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12021da177e4SLinus Torvalds } else if (maj_stat != 0) { 12031da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 12041da177e4SLinus Torvalds goto out_put_ctx; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 12071da177e4SLinus Torvalds gss_put_ctx(ctx); 12081da177e4SLinus Torvalds return p; 12091da177e4SLinus Torvalds out_put_ctx: 12101da177e4SLinus Torvalds gss_put_ctx(ctx); 12111da177e4SLinus Torvalds return NULL; 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds 1214cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1215cd019f75STrond Myklebust { 1216a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1217cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1218cd019f75STrond Myklebust struct gss_cred, 1219cd019f75STrond Myklebust gc_base); 1220cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1221cd019f75STrond Myklebust struct auth_cred acred = { 1222cd019f75STrond Myklebust .uid = oldcred->cr_uid, 122368c97153STrond Myklebust .principal = gss_cred->gc_principal, 122468c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1225cd019f75STrond Myklebust }; 1226cd019f75STrond Myklebust struct rpc_cred *new; 1227cd019f75STrond Myklebust 1228cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1229cd019f75STrond Myklebust if (IS_ERR(new)) 1230cd019f75STrond Myklebust return PTR_ERR(new); 1231a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1232cd019f75STrond Myklebust put_rpccred(oldcred); 1233cd019f75STrond Myklebust return 0; 1234cd019f75STrond Myklebust } 1235cd019f75STrond Myklebust 1236126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1237126e216aSTrond Myklebust { 1238126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1239126e216aSTrond Myklebust unsigned long now = jiffies; 1240126e216aSTrond Myklebust unsigned long begin, expire; 1241126e216aSTrond Myklebust struct gss_cred *gss_cred; 1242126e216aSTrond Myklebust 1243126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1244126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1245126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1246126e216aSTrond Myklebust 1247126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1248126e216aSTrond Myklebust return 1; 1249126e216aSTrond Myklebust } 1250126e216aSTrond Myklebust return 0; 1251126e216aSTrond Myklebust } 1252126e216aSTrond Myklebust 12531da177e4SLinus Torvalds /* 12541da177e4SLinus Torvalds * Refresh credentials. XXX - finish 12551da177e4SLinus Torvalds */ 12561da177e4SLinus Torvalds static int 12571da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 12581da177e4SLinus Torvalds { 1259a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1260cd019f75STrond Myklebust int ret = 0; 12611da177e4SLinus Torvalds 1262126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1263126e216aSTrond Myklebust return -EKEYEXPIRED; 1264126e216aSTrond Myklebust 1265cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1266cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1267cd019f75STrond Myklebust ret = gss_renew_cred(task); 1268cd019f75STrond Myklebust if (ret < 0) 1269cd019f75STrond Myklebust goto out; 1270a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1271cd019f75STrond Myklebust } 1272cd019f75STrond Myklebust 1273cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1274cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1275cd019f75STrond Myklebust out: 1276cd019f75STrond Myklebust return ret; 12771da177e4SLinus Torvalds } 12781da177e4SLinus Torvalds 12790df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 12800df7fb74STrond Myklebust static int 12810df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 12820df7fb74STrond Myklebust { 12830df7fb74STrond Myklebust return -EACCES; 12840df7fb74STrond Myklebust } 12850df7fb74STrond Myklebust 1286d8ed029dSAlexey Dobriyan static __be32 * 1287d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 12881da177e4SLinus Torvalds { 1289a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 12901da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1291d8ed029dSAlexey Dobriyan __be32 seq; 12921da177e4SLinus Torvalds struct kvec iov; 12931da177e4SLinus Torvalds struct xdr_buf verf_buf; 12941da177e4SLinus Torvalds struct xdr_netobj mic; 12951da177e4SLinus Torvalds u32 flav,len; 12961da177e4SLinus Torvalds u32 maj_stat; 12971da177e4SLinus Torvalds 1298632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 12991da177e4SLinus Torvalds 13001da177e4SLinus Torvalds flav = ntohl(*p++); 13011da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 13021da177e4SLinus Torvalds goto out_bad; 13031da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 13041da177e4SLinus Torvalds goto out_bad; 13051da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 13061da177e4SLinus Torvalds iov.iov_base = &seq; 13071da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 13081da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 13091da177e4SLinus Torvalds mic.data = (u8 *)p; 13101da177e4SLinus Torvalds mic.len = len; 13111da177e4SLinus Torvalds 131200fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 13131da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1314fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13150df7fb74STrond Myklebust if (maj_stat) { 1316632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1317632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 13181da177e4SLinus Torvalds goto out_bad; 13190df7fb74STrond Myklebust } 132024b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 132124b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 13221be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 13231da177e4SLinus Torvalds gss_put_ctx(ctx); 1324632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1325632f0d05SChuck Lever task->tk_pid, __func__); 13261da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 13271da177e4SLinus Torvalds out_bad: 13281da177e4SLinus Torvalds gss_put_ctx(ctx); 1329632f0d05SChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 13301da177e4SLinus Torvalds return NULL; 13311da177e4SLinus Torvalds } 13321da177e4SLinus Torvalds 13339f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13349f06c719SChuck Lever __be32 *p, void *obj) 13359f06c719SChuck Lever { 13369f06c719SChuck Lever struct xdr_stream xdr; 13379f06c719SChuck Lever 13389f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13399f06c719SChuck Lever encode(rqstp, &xdr, obj); 13409f06c719SChuck Lever } 13419f06c719SChuck Lever 13421da177e4SLinus Torvalds static inline int 13431da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13449f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13459f06c719SChuck Lever __be32 *p, void *obj) 13461da177e4SLinus Torvalds { 13471da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13481da177e4SLinus Torvalds struct xdr_buf integ_buf; 1349d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 13501da177e4SLinus Torvalds struct xdr_netobj mic; 1351d8ed029dSAlexey Dobriyan u32 offset; 1352d8ed029dSAlexey Dobriyan __be32 *q; 13531da177e4SLinus Torvalds struct kvec *iov; 13541da177e4SLinus Torvalds u32 maj_stat = 0; 13551da177e4SLinus Torvalds int status = -EIO; 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds integ_len = p++; 13581da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13591da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13601da177e4SLinus Torvalds 13619f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13641da177e4SLinus Torvalds offset, snd_buf->len - offset)) 13651da177e4SLinus Torvalds return status; 13661da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 13691da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13701da177e4SLinus Torvalds iov = snd_buf->tail; 13711da177e4SLinus Torvalds else 13721da177e4SLinus Torvalds iov = snd_buf->head; 13731da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 13741da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 13751da177e4SLinus Torvalds 137600fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13771da177e4SLinus Torvalds status = -EIO; /* XXX? */ 13781da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1379fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13801da177e4SLinus Torvalds else if (maj_stat) 13811da177e4SLinus Torvalds return status; 13821da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 13831da177e4SLinus Torvalds 13841da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 13851da177e4SLinus Torvalds iov->iov_len += offset; 13861da177e4SLinus Torvalds snd_buf->len += offset; 13871da177e4SLinus Torvalds return 0; 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds 13902d2da60cSJ. Bruce Fields static void 13912d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 13922d2da60cSJ. Bruce Fields { 13932d2da60cSJ. Bruce Fields int i; 13942d2da60cSJ. Bruce Fields 13952d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 13962d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 13972d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 13982d2da60cSJ. Bruce Fields } 13992d2da60cSJ. Bruce Fields 14002d2da60cSJ. Bruce Fields static int 14012d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 14022d2da60cSJ. Bruce Fields { 14032d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14042d2da60cSJ. Bruce Fields int first, last, i; 14052d2da60cSJ. Bruce Fields 14062d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 14072d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 14082d2da60cSJ. Bruce Fields return 0; 14092d2da60cSJ. Bruce Fields } 14102d2da60cSJ. Bruce Fields 14112d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14122d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 14132d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 14142d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 14152d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 14162d2da60cSJ. Bruce Fields GFP_NOFS); 14172d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 14182d2da60cSJ. Bruce Fields goto out; 14192d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 14202d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 14212d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 14222d2da60cSJ. Bruce Fields goto out_free; 14232d2da60cSJ. Bruce Fields } 14242d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 14252d2da60cSJ. Bruce Fields return 0; 14262d2da60cSJ. Bruce Fields out_free: 1427cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1428cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 14292d2da60cSJ. Bruce Fields out: 14302d2da60cSJ. Bruce Fields return -EAGAIN; 14312d2da60cSJ. Bruce Fields } 14322d2da60cSJ. Bruce Fields 14332d2da60cSJ. Bruce Fields static inline int 14342d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14359f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14369f06c719SChuck Lever __be32 *p, void *obj) 14372d2da60cSJ. Bruce Fields { 14382d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14392d2da60cSJ. Bruce Fields u32 offset; 14402d2da60cSJ. Bruce Fields u32 maj_stat; 14412d2da60cSJ. Bruce Fields int status; 1442d8ed029dSAlexey Dobriyan __be32 *opaque_len; 14432d2da60cSJ. Bruce Fields struct page **inpages; 14442d2da60cSJ. Bruce Fields int first; 14452d2da60cSJ. Bruce Fields int pad; 14462d2da60cSJ. Bruce Fields struct kvec *iov; 14472d2da60cSJ. Bruce Fields char *tmp; 14482d2da60cSJ. Bruce Fields 14492d2da60cSJ. Bruce Fields opaque_len = p++; 14502d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14512d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14522d2da60cSJ. Bruce Fields 14539f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14542d2da60cSJ. Bruce Fields 14552d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 14562d2da60cSJ. Bruce Fields if (status) 14572d2da60cSJ. Bruce Fields return status; 14582d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14592d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 14602d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14612d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14627561042fSKevin Coffman /* 14637561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 14647561042fSKevin Coffman * head when wrapping: 14657561042fSKevin Coffman * 14667561042fSKevin Coffman * call_allocate() allocates twice the slack space required 14677561042fSKevin Coffman * by the authentication flavor to rq_callsize. 14687561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14697561042fSKevin Coffman */ 14702d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14712d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14722d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14732d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14742d2da60cSJ. Bruce Fields } 147500fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14767561042fSKevin Coffman /* slack space should prevent this ever happening: */ 14772d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 14782d2da60cSJ. Bruce Fields status = -EIO; 14792d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 14802d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 14812d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1482fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14832d2da60cSJ. Bruce Fields else if (maj_stat) 14842d2da60cSJ. Bruce Fields return status; 14852d2da60cSJ. Bruce Fields 14862d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 14872d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 14882d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 14892d2da60cSJ. Bruce Fields iov = snd_buf->tail; 14902d2da60cSJ. Bruce Fields else 14912d2da60cSJ. Bruce Fields iov = snd_buf->head; 14922d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 14932d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 14942d2da60cSJ. Bruce Fields memset(p, 0, pad); 14952d2da60cSJ. Bruce Fields iov->iov_len += pad; 14962d2da60cSJ. Bruce Fields snd_buf->len += pad; 14972d2da60cSJ. Bruce Fields 14982d2da60cSJ. Bruce Fields return 0; 14992d2da60cSJ. Bruce Fields } 15002d2da60cSJ. Bruce Fields 15011da177e4SLinus Torvalds static int 15021da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 15039f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 15041da177e4SLinus Torvalds { 1505a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15061da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15071da177e4SLinus Torvalds gc_base); 15081da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 15091da177e4SLinus Torvalds int status = -EIO; 15101da177e4SLinus Torvalds 1511632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 15121da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 15131da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 15141da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 15151da177e4SLinus Torvalds */ 15169f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15179f06c719SChuck Lever status = 0; 15181da177e4SLinus Torvalds goto out; 15191da177e4SLinus Torvalds } 15201da177e4SLinus Torvalds switch (gss_cred->gc_service) { 15211da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 15229f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15239f06c719SChuck Lever status = 0; 15241da177e4SLinus Torvalds break; 15251da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 152689f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 15271da177e4SLinus Torvalds break; 15281da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 152989f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 15301da177e4SLinus Torvalds break; 15311da177e4SLinus Torvalds } 15321da177e4SLinus Torvalds out: 15331da177e4SLinus Torvalds gss_put_ctx(ctx); 1534632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15351da177e4SLinus Torvalds return status; 15361da177e4SLinus Torvalds } 15371da177e4SLinus Torvalds 15381da177e4SLinus Torvalds static inline int 15391da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1540d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15411da177e4SLinus Torvalds { 15421da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15431da177e4SLinus Torvalds struct xdr_buf integ_buf; 15441da177e4SLinus Torvalds struct xdr_netobj mic; 15451da177e4SLinus Torvalds u32 data_offset, mic_offset; 15461da177e4SLinus Torvalds u32 integ_len; 15471da177e4SLinus Torvalds u32 maj_stat; 15481da177e4SLinus Torvalds int status = -EIO; 15491da177e4SLinus Torvalds 15501da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 15511da177e4SLinus Torvalds if (integ_len & 3) 15521da177e4SLinus Torvalds return status; 15531da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15541da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 15551da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 15561da177e4SLinus Torvalds return status; 15571da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15581da177e4SLinus Torvalds return status; 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15611da177e4SLinus Torvalds mic_offset - data_offset)) 15621da177e4SLinus Torvalds return status; 15631da177e4SLinus Torvalds 15641da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15651da177e4SLinus Torvalds return status; 15661da177e4SLinus Torvalds 156700fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15681da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1569fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15701da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15711da177e4SLinus Torvalds return status; 15721da177e4SLinus Torvalds return 0; 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds 15752d2da60cSJ. Bruce Fields static inline int 15762d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1577d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15782d2da60cSJ. Bruce Fields { 15792d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15802d2da60cSJ. Bruce Fields u32 offset; 15812d2da60cSJ. Bruce Fields u32 opaque_len; 15822d2da60cSJ. Bruce Fields u32 maj_stat; 15832d2da60cSJ. Bruce Fields int status = -EIO; 15842d2da60cSJ. Bruce Fields 15852d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 15862d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15872d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 15882d2da60cSJ. Bruce Fields return status; 15892d2da60cSJ. Bruce Fields /* remove padding: */ 15902d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 15912d2da60cSJ. Bruce Fields 159200fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 15932d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1594fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15952d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 15962d2da60cSJ. Bruce Fields return status; 15972d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 15982d2da60cSJ. Bruce Fields return status; 15992d2da60cSJ. Bruce Fields 16002d2da60cSJ. Bruce Fields return 0; 16012d2da60cSJ. Bruce Fields } 16022d2da60cSJ. Bruce Fields 1603bf269551SChuck Lever static int 1604bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1605bf269551SChuck Lever __be32 *p, void *obj) 1606bf269551SChuck Lever { 1607bf269551SChuck Lever struct xdr_stream xdr; 1608bf269551SChuck Lever 1609bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1610bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1611bf269551SChuck Lever } 16122d2da60cSJ. Bruce Fields 16131da177e4SLinus Torvalds static int 16141da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1615bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 16161da177e4SLinus Torvalds { 1617a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16181da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 16191da177e4SLinus Torvalds gc_base); 16201da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1621d8ed029dSAlexey Dobriyan __be32 *savedp = p; 16222d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 16232d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 16241da177e4SLinus Torvalds int status = -EIO; 16251da177e4SLinus Torvalds 16261da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 16271da177e4SLinus Torvalds goto out_decode; 16281da177e4SLinus Torvalds switch (gss_cred->gc_service) { 16291da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 16301da177e4SLinus Torvalds break; 16311da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 16321da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 16331da177e4SLinus Torvalds if (status) 16341da177e4SLinus Torvalds goto out; 16351da177e4SLinus Torvalds break; 16361da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 16372d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 16382d2da60cSJ. Bruce Fields if (status) 16392d2da60cSJ. Bruce Fields goto out; 16401da177e4SLinus Torvalds break; 16411da177e4SLinus Torvalds } 164224b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16431be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16442d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 16451da177e4SLinus Torvalds out_decode: 1646bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16471da177e4SLinus Torvalds out: 16481da177e4SLinus Torvalds gss_put_ctx(ctx); 1649632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1650632f0d05SChuck Lever task->tk_pid, __func__, status); 16511da177e4SLinus Torvalds return status; 16521da177e4SLinus Torvalds } 16531da177e4SLinus Torvalds 1654f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 16551da177e4SLinus Torvalds .owner = THIS_MODULE, 16561da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16571da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 16581da177e4SLinus Torvalds .create = gss_create, 16591da177e4SLinus Torvalds .destroy = gss_destroy, 16601da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 166180df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 166280df9d20SStanislav Kinsbursky .pipes_create = gss_pipes_dentries_create, 166380df9d20SStanislav Kinsbursky .pipes_destroy = gss_pipes_dentries_destroy, 16646a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16659568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 1666a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 16671da177e4SLinus Torvalds }; 16681da177e4SLinus Torvalds 1669f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 16701da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 16711da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1672fba3bad4STrond Myklebust .cr_init = gss_cred_init, 16735c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16741da177e4SLinus Torvalds .crmatch = gss_match, 16751da177e4SLinus Torvalds .crmarshal = gss_marshal, 16761da177e4SLinus Torvalds .crrefresh = gss_refresh, 16771da177e4SLinus Torvalds .crvalidate = gss_validate, 16781da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 16791da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 16801da177e4SLinus Torvalds }; 16811da177e4SLinus Torvalds 16820df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 16830df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 16846dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 16855c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16860df7fb74STrond Myklebust .crmatch = gss_match, 16870df7fb74STrond Myklebust .crmarshal = gss_marshal, 16880df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 16890df7fb74STrond Myklebust .crvalidate = gss_validate, 16900df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 16910df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 16920df7fb74STrond Myklebust }; 16930df7fb74STrond Myklebust 1694b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1695c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 16961da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 16971da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 169834769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 169934769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 170034769fc4S\"J. Bruce Fields\ }; 170134769fc4S\"J. Bruce Fields\ 1702b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1703c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 170434769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 170534769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 170634769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 17071da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 17081da177e4SLinus Torvalds }; 17091da177e4SLinus Torvalds 1710a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 1711a1db410dSStanislav Kinsbursky { 1712a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 1713a1db410dSStanislav Kinsbursky } 1714a1db410dSStanislav Kinsbursky 1715a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 1716a1db410dSStanislav Kinsbursky { 1717a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 1718a1db410dSStanislav Kinsbursky } 1719a1db410dSStanislav Kinsbursky 1720a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 1721a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 1722a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1723a1db410dSStanislav Kinsbursky }; 1724a1db410dSStanislav Kinsbursky 17251da177e4SLinus Torvalds /* 17261da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 17271da177e4SLinus Torvalds */ 17281da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 17291da177e4SLinus Torvalds { 17301da177e4SLinus Torvalds int err = 0; 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 17331da177e4SLinus Torvalds if (err) 17341da177e4SLinus Torvalds goto out; 17351da177e4SLinus Torvalds err = gss_svc_init(); 17361da177e4SLinus Torvalds if (err) 17371da177e4SLinus Torvalds goto out_unregister; 1738a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1739a1db410dSStanislav Kinsbursky if (err) 1740a1db410dSStanislav Kinsbursky goto out_svc_exit; 174179a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17421da177e4SLinus Torvalds return 0; 1743a1db410dSStanislav Kinsbursky out_svc_exit: 1744a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 17451da177e4SLinus Torvalds out_unregister: 17461da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 17471da177e4SLinus Torvalds out: 17481da177e4SLinus Torvalds return err; 17491da177e4SLinus Torvalds } 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 17521da177e4SLinus Torvalds { 1753a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17541da177e4SLinus Torvalds gss_svc_shutdown(); 17551da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 1756bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17571da177e4SLinus Torvalds } 17581da177e4SLinus Torvalds 175971afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 17601da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1761126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 1762126e216aSTrond Myklebust gss_expired_cred_retry_delay, 1763126e216aSTrond Myklebust uint, 0644); 1764126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1765126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 1766126e216aSTrond Myklebust 17671da177e4SLinus Torvalds module_init(init_rpcsec_gss) 17681da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1769