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]; 871da177e4SLinus Torvalds }; 881da177e4SLinus Torvalds 8979a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 9079a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 9179a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 9279a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 93cf81939dS\"J. Bruce Fields\ 945d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 95b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 96b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds static inline struct gss_cl_ctx * 991da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds atomic_inc(&ctx->count); 1021da177e4SLinus Torvalds return ctx; 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds static inline void 1061da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1071da177e4SLinus Torvalds { 1081da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1095d28dc82STrond Myklebust gss_free_ctx(ctx); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1125d28dc82STrond Myklebust /* gss_cred_set_ctx: 1135d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1145d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1159beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1165d28dc82STrond Myklebust */ 1171da177e4SLinus Torvalds static void 1181da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1215d28dc82STrond Myklebust 122cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 123cd019f75STrond Myklebust return; 1247b6962b0STrond Myklebust gss_get_ctx(ctx); 125cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 126fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 127cd019f75STrond Myklebust smp_mb__before_clear_bit(); 128fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static const void * 1321da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1351da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1361da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1371da177e4SLinus Torvalds memcpy(res, p, len); 1381da177e4SLinus Torvalds return q; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds static inline const void * 1421da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1431da177e4SLinus Torvalds { 1441da177e4SLinus Torvalds const void *q; 1451da177e4SLinus Torvalds unsigned int len; 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1481da177e4SLinus Torvalds if (IS_ERR(p)) 1491da177e4SLinus Torvalds return p; 1501da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1511da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1521da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1530f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1541da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1551da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1561da177e4SLinus Torvalds dest->len = len; 1571da177e4SLinus Torvalds return q; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static struct gss_cl_ctx * 1611da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1641da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1651da177e4SLinus Torvalds 1665d28dc82STrond Myklebust rcu_read_lock(); 1671da177e4SLinus Torvalds if (gss_cred->gc_ctx) 1681da177e4SLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1695d28dc82STrond Myklebust rcu_read_unlock(); 1701da177e4SLinus Torvalds return ctx; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds static struct gss_cl_ctx * 1741da177e4SLinus Torvalds gss_alloc_context(void) 1751da177e4SLinus Torvalds { 1761da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1771da177e4SLinus Torvalds 1780f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1791da177e4SLinus Torvalds if (ctx != NULL) { 1801da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1811da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1821da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1831da177e4SLinus Torvalds atomic_set(&ctx->count,1); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds return ctx; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1891da177e4SLinus Torvalds static const void * 1901da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds const void *q; 1931da177e4SLinus Torvalds unsigned int seclen; 1941da177e4SLinus Torvalds unsigned int timeout; 195620038f6SAndy Adamson unsigned long now = jiffies; 1961da177e4SLinus Torvalds u32 window_size; 1971da177e4SLinus Torvalds int ret; 1981da177e4SLinus Torvalds 199620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 200620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 201620038f6SAndy Adamson * the -t value passed to GSSD. 202620038f6SAndy Adamson */ 2031da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2041da177e4SLinus Torvalds if (IS_ERR(p)) 2051da177e4SLinus Torvalds goto err; 2061da177e4SLinus Torvalds if (timeout == 0) 2071da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 208620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 209620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 210620038f6SAndy Adamson * simultaneous requests 211620038f6SAndy Adamson */ 2121da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2131da177e4SLinus Torvalds if (IS_ERR(p)) 2141da177e4SLinus Torvalds goto err; 2151da177e4SLinus Torvalds ctx->gc_win = window_size; 2161da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2171da177e4SLinus Torvalds if (ctx->gc_win == 0) { 218dc5ddce9SJeff Layton /* 219dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 220dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 221dc5ddce9SJeff Layton */ 222dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 223dc5ddce9SJeff Layton if (!IS_ERR(p)) 224dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 225dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2261da177e4SLinus Torvalds goto err; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds /* copy the opaque wire context */ 2291da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2301da177e4SLinus Torvalds if (IS_ERR(p)) 2311da177e4SLinus Torvalds goto err; 2321da177e4SLinus Torvalds /* import the opaque security context */ 2331da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2341da177e4SLinus Torvalds if (IS_ERR(p)) 2351da177e4SLinus Torvalds goto err; 2361da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2371da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2381da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2391da177e4SLinus Torvalds goto err; 2401da177e4SLinus Torvalds } 241400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2421da177e4SLinus Torvalds if (ret < 0) { 2431da177e4SLinus Torvalds p = ERR_PTR(ret); 2441da177e4SLinus Torvalds goto err; 2451da177e4SLinus Torvalds } 246620038f6SAndy Adamson dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", 247620038f6SAndy Adamson __func__, ctx->gc_expiry, now, timeout); 2481da177e4SLinus Torvalds return q; 2491da177e4SLinus Torvalds err: 250173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2511da177e4SLinus Torvalds return p; 2521da177e4SLinus Torvalds } 2531da177e4SLinus Torvalds 25434769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds struct gss_upcall_msg { 2571da177e4SLinus Torvalds atomic_t count; 2587eaf040bSEric W. Biederman kuid_t uid; 2591da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2601da177e4SLinus Torvalds struct list_head list; 2611da177e4SLinus Torvalds struct gss_auth *auth; 2629beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2631da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2641da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2651da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 26634769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2671da177e4SLinus Torvalds }; 2681da177e4SLinus Torvalds 2692aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 27079a3f20bS\"J. Bruce Fields\ { 2712aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 27279a3f20bS\"J. Bruce Fields\ int ret; 27379a3f20bS\"J. Bruce Fields\ 27479a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 2752aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 2762aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 2772aed8b47STrond Myklebust ret = sn->pipe_version; 27879a3f20bS\"J. Bruce Fields\ } else 27979a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 28079a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28179a3f20bS\"J. Bruce Fields\ return ret; 28279a3f20bS\"J. Bruce Fields\ } 28379a3f20bS\"J. Bruce Fields\ 2842aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 28579a3f20bS\"J. Bruce Fields\ { 2862aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 2872aed8b47STrond Myklebust 2882aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 2892aed8b47STrond Myklebust sn->pipe_version = -1; 29079a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 29179a3f20bS\"J. Bruce Fields\ } 29279a3f20bS\"J. Bruce Fields\ } 29379a3f20bS\"J. Bruce Fields\ 2941da177e4SLinus Torvalds static void 2951da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 2961da177e4SLinus Torvalds { 2972aed8b47STrond Myklebust struct net *net = rpc_net_ns(gss_msg->auth->client); 2981da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2991da177e4SLinus Torvalds return; 3002aed8b47STrond Myklebust put_pipe_version(net); 3011da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3021da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3031da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 304f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3051da177e4SLinus Torvalds kfree(gss_msg); 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds static struct gss_upcall_msg * 3097eaf040bSEric W. Biederman __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3129beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3130b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3141da177e4SLinus Torvalds continue; 3151da177e4SLinus Torvalds atomic_inc(&pos->count); 316632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3171da177e4SLinus Torvalds return pos; 3181da177e4SLinus Torvalds } 319632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3201da177e4SLinus Torvalds return NULL; 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 323720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3241da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3251da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3261da177e4SLinus Torvalds */ 3271da177e4SLinus Torvalds static inline struct gss_upcall_msg * 328053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3291da177e4SLinus Torvalds { 3309beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3311da177e4SLinus Torvalds struct gss_upcall_msg *old; 3321da177e4SLinus Torvalds 3339beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3349beae467SStanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3351da177e4SLinus Torvalds if (old == NULL) { 3361da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3379beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3381da177e4SLinus Torvalds } else 3391da177e4SLinus Torvalds gss_msg = old; 3409beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3411da177e4SLinus Torvalds return gss_msg; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds static void 3451da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3481da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3491da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3501da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds static void 3541da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3551da177e4SLinus Torvalds { 3569beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3571da177e4SLinus Torvalds 3583b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3593b68aaeaSTrond Myklebust return; 3609beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3613b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3621da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3639beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds static void 367126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 368126e216aSTrond Myklebust { 369126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 370126e216aSTrond Myklebust case 0: 371126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 372126e216aSTrond Myklebust break; 373126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 374126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 375126e216aSTrond Myklebust break; 376126e216aSTrond Myklebust case -EKEYEXPIRED: 377126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 378126e216aSTrond Myklebust } 379126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 380126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 381126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 382126e216aSTrond Myklebust } 383126e216aSTrond Myklebust 384126e216aSTrond Myklebust static void 3851da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 3861da177e4SLinus Torvalds { 387a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 3881da177e4SLinus Torvalds struct gss_cred, gc_base); 3891da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3909beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3911da177e4SLinus Torvalds 3929beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 393126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 3949beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 395126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 3961da177e4SLinus Torvalds gss_release_msg(gss_msg); 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 39934769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 40034769fc4S\"J. Bruce Fields\ { 40190602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 40290602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 40390602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 40490602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 40590602c7bSEric W. Biederman BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); 40634769fc4S\"J. Bruce Fields\ } 40734769fc4S\"J. Bruce Fields\ 4088b1c7bf5SOlga Kornievskaia static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 40968c97153STrond Myklebust struct rpc_clnt *clnt, 41068c97153STrond Myklebust const char *service_name) 41134769fc4S\"J. Bruce Fields\ { 412683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4138b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4148b1c7bf5SOlga Kornievskaia int len = 0; 4158b1c7bf5SOlga Kornievskaia 4168b1c7bf5SOlga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 417683ac665STrond Myklebust mech->gm_name, 41890602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4198b1c7bf5SOlga Kornievskaia p += gss_msg->msg.len; 4208b1c7bf5SOlga Kornievskaia if (clnt->cl_principal) { 4218b1c7bf5SOlga Kornievskaia len = sprintf(p, "target=%s ", clnt->cl_principal); 4228b1c7bf5SOlga Kornievskaia p += len; 4238b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4248b1c7bf5SOlga Kornievskaia } 42568c97153STrond Myklebust if (service_name != NULL) { 42668c97153STrond Myklebust len = sprintf(p, "service=%s ", service_name); 4272efef708SOlga Kornievskaia p += len; 4282efef708SOlga Kornievskaia gss_msg->msg.len += len; 4292efef708SOlga Kornievskaia } 430683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 431f8628220SKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 432683ac665STrond Myklebust p += len; 433683ac665STrond Myklebust gss_msg->msg.len += len; 434683ac665STrond Myklebust } 4358b1c7bf5SOlga Kornievskaia len = sprintf(p, "\n"); 4368b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4378b1c7bf5SOlga Kornievskaia 43834769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 43934769fc4S\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 44034769fc4S\"J. Bruce Fields\ } 44134769fc4S\"J. Bruce Fields\ 4428b1c7bf5SOlga Kornievskaia static void gss_encode_msg(struct gss_upcall_msg *gss_msg, 44368c97153STrond Myklebust struct rpc_clnt *clnt, 44468c97153STrond Myklebust const char *service_name) 44534769fc4S\"J. Bruce Fields\ { 4462aed8b47STrond Myklebust struct net *net = rpc_net_ns(clnt); 4472aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 4482aed8b47STrond Myklebust 4492aed8b47STrond Myklebust if (sn->pipe_version == 0) 45034769fc4S\"J. Bruce Fields\ gss_encode_v0_msg(gss_msg); 45134769fc4S\"J. Bruce Fields\ else /* pipe_version == 1 */ 45268c97153STrond Myklebust gss_encode_v1_msg(gss_msg, clnt, service_name); 45334769fc4S\"J. Bruce Fields\ } 45434769fc4S\"J. Bruce Fields\ 45568c97153STrond Myklebust static struct gss_upcall_msg * 45668c97153STrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt, 4577eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4581da177e4SLinus Torvalds { 4591da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 46079a3f20bS\"J. Bruce Fields\ int vers; 4611da177e4SLinus Torvalds 4620f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 463db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 464db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 4652aed8b47STrond Myklebust vers = get_pipe_version(rpc_net_ns(clnt)); 46679a3f20bS\"J. Bruce Fields\ if (vers < 0) { 46779a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 46879a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 46979a3f20bS\"J. Bruce Fields\ } 470c239d83bSStanislav Kinsbursky gss_msg->pipe = gss_auth->pipe[vers]; 4711da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 4721da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 4731da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 4741da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 4751da177e4SLinus Torvalds gss_msg->uid = uid; 4761da177e4SLinus Torvalds gss_msg->auth = gss_auth; 47768c97153STrond Myklebust gss_encode_msg(gss_msg, clnt, service_name); 4781da177e4SLinus Torvalds return gss_msg; 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds static struct gss_upcall_msg * 4821da177e4SLinus Torvalds gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 4831da177e4SLinus Torvalds { 4847c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4857c67db3aSTrond Myklebust struct gss_cred, gc_base); 4861da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4877eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 4881da177e4SLinus Torvalds 48968c97153STrond Myklebust gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal); 490db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 491db75b3d6S\"J. Bruce Fields\ return gss_new; 492053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 4931da177e4SLinus Torvalds if (gss_msg == gss_new) { 4949beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4951da177e4SLinus Torvalds if (res) { 4961da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4971da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds } else 5001da177e4SLinus Torvalds gss_release_msg(gss_new); 5011da177e4SLinus Torvalds return gss_msg; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 504b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 505b03568c3S\"J. Bruce Fields\ { 506b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 507b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 508b03568c3S\"J. Bruce Fields\ 509b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 510b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 511b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 512b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 513b03568c3S\"J. Bruce Fields\ } 514b03568c3S\"J. Bruce Fields\ } 515b03568c3S\"J. Bruce Fields\ 5161da177e4SLinus Torvalds static inline int 5171da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5181da177e4SLinus Torvalds { 519a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5204a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5211da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5221da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5231da177e4SLinus Torvalds struct gss_cred, gc_base); 5241da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5259beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5261da177e4SLinus Torvalds int err = 0; 5271da177e4SLinus Torvalds 528632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 529cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 5301da177e4SLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 531480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 53279a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 53379a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 53479a3f20bS\"J. Bruce Fields\ warn_gssd(); 53579a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 53679a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 537d1a8016aSBryan Schumaker return -EAGAIN; 53879a3f20bS\"J. Bruce Fields\ } 5391da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5401da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5411da177e4SLinus Torvalds goto out; 5421da177e4SLinus Torvalds } 5439beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5449beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5451da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5465d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 547126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5481da177e4SLinus Torvalds task->tk_timeout = 0; 5491da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5501da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5511da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5525d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 553126e216aSTrond Myklebust } else { 554126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5551da177e4SLinus Torvalds err = gss_msg->msg.errno; 556126e216aSTrond Myklebust } 5579beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5581da177e4SLinus Torvalds gss_release_msg(gss_msg); 5591da177e4SLinus Torvalds out: 560632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 561cdba321eSEric W. Biederman task->tk_pid, __func__, 562cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 5631da177e4SLinus Torvalds return err; 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds static inline int 5671da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5681da177e4SLinus Torvalds { 569abfdbd53STrond Myklebust struct net *net = rpc_net_ns(gss_auth->client); 570abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 5719beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5721da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5731da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 574abfdbd53STrond Myklebust unsigned long timeout; 5751da177e4SLinus Torvalds DEFINE_WAIT(wait); 576d36ccb9cSTrond Myklebust int err; 5771da177e4SLinus Torvalds 578cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 579cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 58079a3f20bS\"J. Bruce Fields\ retry: 581d36ccb9cSTrond Myklebust err = 0; 582abfdbd53STrond Myklebust /* Default timeout is 15s unless we know that gssd is not running */ 583abfdbd53STrond Myklebust timeout = 15 * HZ; 584abfdbd53STrond Myklebust if (!sn->gssd_running) 585abfdbd53STrond Myklebust timeout = HZ >> 2; 5861da177e4SLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 58779a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 58879a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 5892aed8b47STrond Myklebust sn->pipe_version >= 0, timeout); 5902aed8b47STrond Myklebust if (sn->pipe_version < 0) { 591abfdbd53STrond Myklebust if (err == 0) 592abfdbd53STrond Myklebust sn->gssd_running = 0; 593d1a8016aSBryan Schumaker warn_gssd(); 594d1a8016aSBryan Schumaker err = -EACCES; 595d1a8016aSBryan Schumaker } 596d36ccb9cSTrond Myklebust if (err < 0) 59779a3f20bS\"J. Bruce Fields\ goto out; 59879a3f20bS\"J. Bruce Fields\ goto retry; 59979a3f20bS\"J. Bruce Fields\ } 6001da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6011da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6021da177e4SLinus Torvalds goto out; 6031da177e4SLinus Torvalds } 6049beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6051da177e4SLinus Torvalds for (;;) { 6065afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6079beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6081da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6091da177e4SLinus Torvalds break; 6101da177e4SLinus Torvalds } 6119beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6125afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6131da177e4SLinus Torvalds err = -ERESTARTSYS; 6141da177e4SLinus Torvalds goto out_intr; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds schedule(); 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds if (gss_msg->ctx) 6197b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6201da177e4SLinus Torvalds else 6211da177e4SLinus Torvalds err = gss_msg->msg.errno; 6229beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6231da177e4SLinus Torvalds out_intr: 6241da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6251da177e4SLinus Torvalds gss_release_msg(gss_msg); 6261da177e4SLinus Torvalds out: 627632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 628cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6291da177e4SLinus Torvalds return err; 6301da177e4SLinus Torvalds } 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds static ssize_t 6351da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6361da177e4SLinus Torvalds { 6371da177e4SLinus Torvalds const void *p, *end; 6381da177e4SLinus Torvalds void *buf; 6391da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 640496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6411da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 64290602c7bSEric W. Biederman uid_t id; 64390602c7bSEric W. Biederman kuid_t uid; 6443b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6471da177e4SLinus Torvalds goto out; 6481da177e4SLinus Torvalds err = -ENOMEM; 6490f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6501da177e4SLinus Torvalds if (!buf) 6511da177e4SLinus Torvalds goto out; 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds err = -EFAULT; 6541da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6551da177e4SLinus Torvalds goto err; 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 65890602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6591da177e4SLinus Torvalds if (IS_ERR(p)) { 6601da177e4SLinus Torvalds err = PTR_ERR(p); 6611da177e4SLinus Torvalds goto err; 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds 66490602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 66590602c7bSEric W. Biederman if (!uid_valid(uid)) { 66690602c7bSEric W. Biederman err = -EINVAL; 66790602c7bSEric W. Biederman goto err; 66890602c7bSEric W. Biederman } 66990602c7bSEric W. Biederman 6701da177e4SLinus Torvalds err = -ENOMEM; 6711da177e4SLinus Torvalds ctx = gss_alloc_context(); 6721da177e4SLinus Torvalds if (ctx == NULL) 6731da177e4SLinus Torvalds goto err; 6743b68aaeaSTrond Myklebust 6753b68aaeaSTrond Myklebust err = -ENOENT; 6763b68aaeaSTrond Myklebust /* Find a matching upcall */ 6779beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6789beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6793b68aaeaSTrond Myklebust if (gss_msg == NULL) { 6809beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6813b68aaeaSTrond Myklebust goto err_put_ctx; 6823b68aaeaSTrond Myklebust } 6833b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 6849beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6853b68aaeaSTrond Myklebust 6866e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6871da177e4SLinus Torvalds if (IS_ERR(p)) { 6881da177e4SLinus Torvalds err = PTR_ERR(p); 689486bad2eSJeff Layton switch (err) { 690486bad2eSJeff Layton case -EACCES: 691dc5ddce9SJeff Layton case -EKEYEXPIRED: 692486bad2eSJeff Layton gss_msg->msg.errno = err; 693486bad2eSJeff Layton err = mlen; 694486bad2eSJeff Layton break; 695486bad2eSJeff Layton case -EFAULT: 696486bad2eSJeff Layton case -ENOMEM: 697486bad2eSJeff Layton case -EINVAL: 698486bad2eSJeff Layton case -ENOSYS: 699486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 700486bad2eSJeff Layton break; 701486bad2eSJeff Layton default: 702486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7036c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 704486bad2eSJeff Layton BUG(); 705486bad2eSJeff Layton } 7063b68aaeaSTrond Myklebust goto err_release_msg; 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7093b68aaeaSTrond Myklebust err = mlen; 7103b68aaeaSTrond Myklebust 7113b68aaeaSTrond Myklebust err_release_msg: 7129beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7131da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7149beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7151da177e4SLinus Torvalds gss_release_msg(gss_msg); 7161da177e4SLinus Torvalds err_put_ctx: 7171da177e4SLinus Torvalds gss_put_ctx(ctx); 7181da177e4SLinus Torvalds err: 7191da177e4SLinus Torvalds kfree(buf); 7201da177e4SLinus Torvalds out: 721632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7221da177e4SLinus Torvalds return err; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 72534769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 726cf81939dS\"J. Bruce Fields\ { 7272aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7282aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 72934769fc4S\"J. Bruce Fields\ int ret = 0; 73034769fc4S\"J. Bruce Fields\ 73179a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 7322aed8b47STrond Myklebust if (sn->pipe_version < 0) { 73334769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 7342aed8b47STrond Myklebust sn->pipe_version = new_version; 73579a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 73679a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 7372aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 73834769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 73934769fc4S\"J. Bruce Fields\ ret = -EBUSY; 74034769fc4S\"J. Bruce Fields\ goto out; 74179a3f20bS\"J. Bruce Fields\ } 7422aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 74334769fc4S\"J. Bruce Fields\ out: 74479a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 74534769fc4S\"J. Bruce Fields\ return ret; 74634769fc4S\"J. Bruce Fields\ 74734769fc4S\"J. Bruce Fields\ } 74834769fc4S\"J. Bruce Fields\ 74934769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 75034769fc4S\"J. Bruce Fields\ { 75134769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 75234769fc4S\"J. Bruce Fields\ } 75334769fc4S\"J. Bruce Fields\ 75434769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 75534769fc4S\"J. Bruce Fields\ { 75634769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 757cf81939dS\"J. Bruce Fields\ } 758cf81939dS\"J. Bruce Fields\ 7591da177e4SLinus Torvalds static void 7601da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 7611da177e4SLinus Torvalds { 7622aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7639beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7641da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 7651da177e4SLinus Torvalds 7665a67657aSTrond Myklebust restart: 7679beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7689beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7696e84c7b6STrond Myklebust 7705a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7715a67657aSTrond Myklebust continue; 7721da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 7731da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7741da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7759beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7761da177e4SLinus Torvalds gss_release_msg(gss_msg); 7775a67657aSTrond Myklebust goto restart; 7781da177e4SLinus Torvalds } 7799beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 780cf81939dS\"J. Bruce Fields\ 7812aed8b47STrond Myklebust put_pipe_version(net); 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds static void 7851da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7861da177e4SLinus Torvalds { 7871da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds if (msg->errno < 0) { 790632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 791632f0d05SChuck Lever __func__, gss_msg); 7921da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7931da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 794b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 795b03568c3S\"J. Bruce Fields\ warn_gssd(); 7961da177e4SLinus Torvalds gss_release_msg(gss_msg); 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 800ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy(struct rpc_auth *auth) 801ccdc28f8SStanislav Kinsbursky { 802ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 803ccdc28f8SStanislav Kinsbursky 804ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 80580df9d20SStanislav Kinsbursky if (gss_auth->pipe[0]->dentry) 806ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[0]->dentry); 80780df9d20SStanislav Kinsbursky if (gss_auth->pipe[1]->dentry) 808ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 809ccdc28f8SStanislav Kinsbursky } 810ccdc28f8SStanislav Kinsbursky 811ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create(struct rpc_auth *auth) 812ccdc28f8SStanislav Kinsbursky { 813ccdc28f8SStanislav Kinsbursky int err; 814ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 815ccdc28f8SStanislav Kinsbursky struct rpc_clnt *clnt; 816ccdc28f8SStanislav Kinsbursky 817ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 818ccdc28f8SStanislav Kinsbursky clnt = gss_auth->client; 819ccdc28f8SStanislav Kinsbursky 82030507f58SStanislav Kinsbursky gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 821ccdc28f8SStanislav Kinsbursky "gssd", 822ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[1]); 823ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1]->dentry)) 824ccdc28f8SStanislav Kinsbursky return PTR_ERR(gss_auth->pipe[1]->dentry); 82530507f58SStanislav Kinsbursky gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 826ccdc28f8SStanislav Kinsbursky gss_auth->mech->gm_name, 827ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[0]); 828ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0]->dentry)) { 829ccdc28f8SStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]->dentry); 830ccdc28f8SStanislav Kinsbursky goto err_unlink_pipe_1; 831ccdc28f8SStanislav Kinsbursky } 832ccdc28f8SStanislav Kinsbursky return 0; 833ccdc28f8SStanislav Kinsbursky 834ccdc28f8SStanislav Kinsbursky err_unlink_pipe_1: 835ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 836ccdc28f8SStanislav Kinsbursky return err; 837ccdc28f8SStanislav Kinsbursky } 838ccdc28f8SStanislav Kinsbursky 839ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, 840ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 841ccdc28f8SStanislav Kinsbursky { 8422446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 843ccdc28f8SStanislav Kinsbursky struct super_block *sb; 844ccdc28f8SStanislav Kinsbursky 845ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 846ccdc28f8SStanislav Kinsbursky if (sb) { 84730507f58SStanislav Kinsbursky if (clnt->cl_dentry) 848ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy(auth); 849ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 850ccdc28f8SStanislav Kinsbursky } 851ccdc28f8SStanislav Kinsbursky } 852ccdc28f8SStanislav Kinsbursky 853ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, 854ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 855ccdc28f8SStanislav Kinsbursky { 8562446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 857ccdc28f8SStanislav Kinsbursky struct super_block *sb; 858ccdc28f8SStanislav Kinsbursky int err = 0; 859ccdc28f8SStanislav Kinsbursky 860ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 861ccdc28f8SStanislav Kinsbursky if (sb) { 86230507f58SStanislav Kinsbursky if (clnt->cl_dentry) 863ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create(auth); 864ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 865ccdc28f8SStanislav Kinsbursky } 866ccdc28f8SStanislav Kinsbursky return err; 867ccdc28f8SStanislav Kinsbursky } 868ccdc28f8SStanislav Kinsbursky 8691da177e4SLinus Torvalds /* 8701da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 8711da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8721da177e4SLinus Torvalds */ 8731da177e4SLinus Torvalds static struct rpc_auth * 8741da177e4SLinus Torvalds gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 8751da177e4SLinus Torvalds { 8761da177e4SLinus Torvalds struct gss_auth *gss_auth; 8771da177e4SLinus Torvalds struct rpc_auth * auth; 8786a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 8791da177e4SLinus Torvalds 8801da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 8836a19275aSJ. Bruce Fields return ERR_PTR(err); 8841da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8851da177e4SLinus Torvalds goto out_dec; 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: 9401da177e4SLinus Torvalds kfree(gss_auth); 9411da177e4SLinus Torvalds out_dec: 9421da177e4SLinus Torvalds module_put(THIS_MODULE); 9436a19275aSJ. Bruce Fields return ERR_PTR(err); 9441da177e4SLinus Torvalds } 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds static void 9470285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 9480285ed1fSTrond Myklebust { 949ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); 950c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 951c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9520285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 9530285ed1fSTrond Myklebust 9540285ed1fSTrond Myklebust kfree(gss_auth); 9550285ed1fSTrond Myklebust module_put(THIS_MODULE); 9560285ed1fSTrond Myklebust } 9570285ed1fSTrond Myklebust 9580285ed1fSTrond Myklebust static void 9590285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 9600285ed1fSTrond Myklebust { 9610285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9620285ed1fSTrond Myklebust 9630285ed1fSTrond Myklebust gss_free(gss_auth); 9640285ed1fSTrond Myklebust } 9650285ed1fSTrond Myklebust 9660285ed1fSTrond Myklebust static void 9671da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds struct gss_auth *gss_auth; 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9721da177e4SLinus Torvalds auth, auth->au_flavor); 9731da177e4SLinus Torvalds 9743ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 9753ab9bb72STrond Myklebust 9761da177e4SLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 9770285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds 9800df7fb74STrond Myklebust /* 9810df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 9820df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 9830df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 9840df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 9850df7fb74STrond Myklebust */ 9860df7fb74STrond Myklebust static int 9870df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 9880df7fb74STrond Myklebust { 9890df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 9900df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 9910df7fb74STrond Myklebust struct rpc_task *task; 9920df7fb74STrond Myklebust 9930df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 9946dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 9950df7fb74STrond Myklebust return 0; 9960df7fb74STrond Myklebust 9970df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 9980df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 9990df7fb74STrond Myklebust 10000df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 10010df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 10020df7fb74STrond Myklebust get_rpccred(cred); 10030df7fb74STrond Myklebust 1004080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 10050df7fb74STrond Myklebust if (!IS_ERR(task)) 10060df7fb74STrond Myklebust rpc_put_task(task); 10070df7fb74STrond Myklebust 10080df7fb74STrond Myklebust put_rpccred(cred); 10090df7fb74STrond Myklebust return 1; 10100df7fb74STrond Myklebust } 10110df7fb74STrond Myklebust 10120df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 10131da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 10141da177e4SLinus Torvalds * allocated before freeing them. */ 10151da177e4SLinus Torvalds static void 10165d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 10171da177e4SLinus Torvalds { 1018632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 10191da177e4SLinus Torvalds 10200d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 10211da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 10221da177e4SLinus Torvalds kfree(ctx); 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds static void 10265d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 10275d28dc82STrond Myklebust { 10285d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 10295d28dc82STrond Myklebust gss_do_free_ctx(ctx); 10305d28dc82STrond Myklebust } 10315d28dc82STrond Myklebust 10325d28dc82STrond Myklebust static void 10335d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 10345d28dc82STrond Myklebust { 10355d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10365d28dc82STrond Myklebust } 10375d28dc82STrond Myklebust 10385d28dc82STrond Myklebust static void 103931be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 10401da177e4SLinus Torvalds { 1041632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 104231be5bf1STrond Myklebust kfree(gss_cred); 104331be5bf1STrond Myklebust } 10441da177e4SLinus Torvalds 104531be5bf1STrond Myklebust static void 104631be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 104731be5bf1STrond Myklebust { 104831be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 104931be5bf1STrond Myklebust gss_free_cred(gss_cred); 105031be5bf1STrond Myklebust } 10511da177e4SLinus Torvalds 105231be5bf1STrond Myklebust static void 10536dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 105431be5bf1STrond Myklebust { 10555d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10560285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10575d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10585d28dc82STrond Myklebust 1059a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 106031be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10615d28dc82STrond Myklebust if (ctx) 10625d28dc82STrond Myklebust gss_put_ctx(ctx); 10630285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 10666dcd3926SJeff Layton static void 10676dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 10686dcd3926SJeff Layton { 10696dcd3926SJeff Layton 10706dcd3926SJeff Layton if (gss_destroying_context(cred)) 10716dcd3926SJeff Layton return; 10726dcd3926SJeff Layton gss_destroy_nullcred(cred); 10736dcd3926SJeff Layton } 10746dcd3926SJeff Layton 10751da177e4SLinus Torvalds /* 10761da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 10771da177e4SLinus Torvalds */ 10781da177e4SLinus Torvalds static struct rpc_cred * 10798a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10801da177e4SLinus Torvalds { 10818a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds static struct rpc_cred * 10858a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10861da177e4SLinus Torvalds { 10871da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 10881da177e4SLinus Torvalds struct gss_cred *cred = NULL; 10891da177e4SLinus Torvalds int err = -ENOMEM; 10901da177e4SLinus Torvalds 1091632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1092cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1093cdba321eSEric W. Biederman auth->au_flavor); 10941da177e4SLinus Torvalds 10950f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 10961da177e4SLinus Torvalds goto out_err; 10971da177e4SLinus Torvalds 10985fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 10991da177e4SLinus Torvalds /* 11001da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 11011da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 11021da177e4SLinus Torvalds */ 1103fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 11041da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 110568c97153STrond Myklebust cred->gc_principal = NULL; 110668c97153STrond Myklebust if (acred->machine_cred) 110768c97153STrond Myklebust cred->gc_principal = acred->principal; 11080285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 11091da177e4SLinus Torvalds return &cred->gc_base; 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds out_err: 1112632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 11131da177e4SLinus Torvalds return ERR_PTR(err); 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds static int 1117fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1118fba3bad4STrond Myklebust { 1119fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1120fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1121fba3bad4STrond Myklebust int err; 1122fba3bad4STrond Myklebust 1123fba3bad4STrond Myklebust do { 1124fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1125fba3bad4STrond Myklebust } while (err == -EAGAIN); 1126fba3bad4STrond Myklebust return err; 1127fba3bad4STrond Myklebust } 1128fba3bad4STrond Myklebust 1129fba3bad4STrond Myklebust static int 11308a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11311da177e4SLinus Torvalds { 11321da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11331da177e4SLinus Torvalds 1134cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11358a317760STrond Myklebust goto out; 11361da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1137cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1138cd019f75STrond Myklebust return 0; 1139cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11401da177e4SLinus Torvalds return 0; 11418a317760STrond Myklebust out: 114268c97153STrond Myklebust if (acred->principal != NULL) { 114368c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 114468c97153STrond Myklebust return 0; 114568c97153STrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 114668c97153STrond Myklebust } 114768c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 11487c67db3aSTrond Myklebust return 0; 11490b4d51b0SEric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds /* 11531da177e4SLinus Torvalds * Marshal credentials. 11541da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 11551da177e4SLinus Torvalds */ 1156d8ed029dSAlexey Dobriyan static __be32 * 1157d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 11581da177e4SLinus Torvalds { 1159a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1160a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 11611da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11621da177e4SLinus Torvalds gc_base); 11631da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1164d8ed029dSAlexey Dobriyan __be32 *cred_len; 11651da177e4SLinus Torvalds u32 maj_stat = 0; 11661da177e4SLinus Torvalds struct xdr_netobj mic; 11671da177e4SLinus Torvalds struct kvec iov; 11681da177e4SLinus Torvalds struct xdr_buf verf_buf; 11691da177e4SLinus Torvalds 1170632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11731da177e4SLinus Torvalds cred_len = p++; 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 11761da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 11771da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 11801da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 11811da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 11821da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 11831da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 11841da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 11871da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1188a4f0835cSTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1189808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 11901da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 11911da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds /* set verifier flavor*/ 11941da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 119700fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 11981da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1199fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12001da177e4SLinus Torvalds } else if (maj_stat != 0) { 12011da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 12021da177e4SLinus Torvalds goto out_put_ctx; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 12051da177e4SLinus Torvalds gss_put_ctx(ctx); 12061da177e4SLinus Torvalds return p; 12071da177e4SLinus Torvalds out_put_ctx: 12081da177e4SLinus Torvalds gss_put_ctx(ctx); 12091da177e4SLinus Torvalds return NULL; 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 1212cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1213cd019f75STrond Myklebust { 1214a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1215cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1216cd019f75STrond Myklebust struct gss_cred, 1217cd019f75STrond Myklebust gc_base); 1218cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1219cd019f75STrond Myklebust struct auth_cred acred = { 1220cd019f75STrond Myklebust .uid = oldcred->cr_uid, 122168c97153STrond Myklebust .principal = gss_cred->gc_principal, 122268c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1223cd019f75STrond Myklebust }; 1224cd019f75STrond Myklebust struct rpc_cred *new; 1225cd019f75STrond Myklebust 1226cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1227cd019f75STrond Myklebust if (IS_ERR(new)) 1228cd019f75STrond Myklebust return PTR_ERR(new); 1229a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1230cd019f75STrond Myklebust put_rpccred(oldcred); 1231cd019f75STrond Myklebust return 0; 1232cd019f75STrond Myklebust } 1233cd019f75STrond Myklebust 1234126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1235126e216aSTrond Myklebust { 1236126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1237126e216aSTrond Myklebust unsigned long now = jiffies; 1238126e216aSTrond Myklebust unsigned long begin, expire; 1239126e216aSTrond Myklebust struct gss_cred *gss_cred; 1240126e216aSTrond Myklebust 1241126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1242126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1243126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1244126e216aSTrond Myklebust 1245126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1246126e216aSTrond Myklebust return 1; 1247126e216aSTrond Myklebust } 1248126e216aSTrond Myklebust return 0; 1249126e216aSTrond Myklebust } 1250126e216aSTrond Myklebust 12511da177e4SLinus Torvalds /* 12521da177e4SLinus Torvalds * Refresh credentials. XXX - finish 12531da177e4SLinus Torvalds */ 12541da177e4SLinus Torvalds static int 12551da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 12561da177e4SLinus Torvalds { 1257a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1258cd019f75STrond Myklebust int ret = 0; 12591da177e4SLinus Torvalds 1260126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1261126e216aSTrond Myklebust return -EKEYEXPIRED; 1262126e216aSTrond Myklebust 1263cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1264cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1265cd019f75STrond Myklebust ret = gss_renew_cred(task); 1266cd019f75STrond Myklebust if (ret < 0) 1267cd019f75STrond Myklebust goto out; 1268a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1269cd019f75STrond Myklebust } 1270cd019f75STrond Myklebust 1271cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1272cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1273cd019f75STrond Myklebust out: 1274cd019f75STrond Myklebust return ret; 12751da177e4SLinus Torvalds } 12761da177e4SLinus Torvalds 12770df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 12780df7fb74STrond Myklebust static int 12790df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 12800df7fb74STrond Myklebust { 12810df7fb74STrond Myklebust return -EACCES; 12820df7fb74STrond Myklebust } 12830df7fb74STrond Myklebust 1284d8ed029dSAlexey Dobriyan static __be32 * 1285d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 12861da177e4SLinus Torvalds { 1287a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 12881da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1289d8ed029dSAlexey Dobriyan __be32 seq; 12901da177e4SLinus Torvalds struct kvec iov; 12911da177e4SLinus Torvalds struct xdr_buf verf_buf; 12921da177e4SLinus Torvalds struct xdr_netobj mic; 12931da177e4SLinus Torvalds u32 flav,len; 12941da177e4SLinus Torvalds u32 maj_stat; 12951da177e4SLinus Torvalds 1296632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds flav = ntohl(*p++); 12991da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 13001da177e4SLinus Torvalds goto out_bad; 13011da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 13021da177e4SLinus Torvalds goto out_bad; 13031da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 13041da177e4SLinus Torvalds iov.iov_base = &seq; 13051da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 13061da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 13071da177e4SLinus Torvalds mic.data = (u8 *)p; 13081da177e4SLinus Torvalds mic.len = len; 13091da177e4SLinus Torvalds 131000fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 13111da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1312fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13130df7fb74STrond Myklebust if (maj_stat) { 1314632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1315632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 13161da177e4SLinus Torvalds goto out_bad; 13170df7fb74STrond Myklebust } 131824b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 131924b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 13201be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 13211da177e4SLinus Torvalds gss_put_ctx(ctx); 1322632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1323632f0d05SChuck Lever task->tk_pid, __func__); 13241da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 13251da177e4SLinus Torvalds out_bad: 13261da177e4SLinus Torvalds gss_put_ctx(ctx); 1327632f0d05SChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 13281da177e4SLinus Torvalds return NULL; 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds 13319f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13329f06c719SChuck Lever __be32 *p, void *obj) 13339f06c719SChuck Lever { 13349f06c719SChuck Lever struct xdr_stream xdr; 13359f06c719SChuck Lever 13369f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13379f06c719SChuck Lever encode(rqstp, &xdr, obj); 13389f06c719SChuck Lever } 13399f06c719SChuck Lever 13401da177e4SLinus Torvalds static inline int 13411da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13429f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13439f06c719SChuck Lever __be32 *p, void *obj) 13441da177e4SLinus Torvalds { 13451da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13461da177e4SLinus Torvalds struct xdr_buf integ_buf; 1347d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 13481da177e4SLinus Torvalds struct xdr_netobj mic; 1349d8ed029dSAlexey Dobriyan u32 offset; 1350d8ed029dSAlexey Dobriyan __be32 *q; 13511da177e4SLinus Torvalds struct kvec *iov; 13521da177e4SLinus Torvalds u32 maj_stat = 0; 13531da177e4SLinus Torvalds int status = -EIO; 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds integ_len = p++; 13561da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13571da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13581da177e4SLinus Torvalds 13599f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13621da177e4SLinus Torvalds offset, snd_buf->len - offset)) 13631da177e4SLinus Torvalds return status; 13641da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 13671da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13681da177e4SLinus Torvalds iov = snd_buf->tail; 13691da177e4SLinus Torvalds else 13701da177e4SLinus Torvalds iov = snd_buf->head; 13711da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 13721da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 13731da177e4SLinus Torvalds 137400fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13751da177e4SLinus Torvalds status = -EIO; /* XXX? */ 13761da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1377fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13781da177e4SLinus Torvalds else if (maj_stat) 13791da177e4SLinus Torvalds return status; 13801da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 13831da177e4SLinus Torvalds iov->iov_len += offset; 13841da177e4SLinus Torvalds snd_buf->len += offset; 13851da177e4SLinus Torvalds return 0; 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds 13882d2da60cSJ. Bruce Fields static void 13892d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 13902d2da60cSJ. Bruce Fields { 13912d2da60cSJ. Bruce Fields int i; 13922d2da60cSJ. Bruce Fields 13932d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 13942d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 13952d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 13962d2da60cSJ. Bruce Fields } 13972d2da60cSJ. Bruce Fields 13982d2da60cSJ. Bruce Fields static int 13992d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 14002d2da60cSJ. Bruce Fields { 14012d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14022d2da60cSJ. Bruce Fields int first, last, i; 14032d2da60cSJ. Bruce Fields 14042d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 14052d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 14062d2da60cSJ. Bruce Fields return 0; 14072d2da60cSJ. Bruce Fields } 14082d2da60cSJ. Bruce Fields 14092d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14102d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 14112d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 14122d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 14132d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 14142d2da60cSJ. Bruce Fields GFP_NOFS); 14152d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 14162d2da60cSJ. Bruce Fields goto out; 14172d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 14182d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 14192d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 14202d2da60cSJ. Bruce Fields goto out_free; 14212d2da60cSJ. Bruce Fields } 14222d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 14232d2da60cSJ. Bruce Fields return 0; 14242d2da60cSJ. Bruce Fields out_free: 1425cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1426cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 14272d2da60cSJ. Bruce Fields out: 14282d2da60cSJ. Bruce Fields return -EAGAIN; 14292d2da60cSJ. Bruce Fields } 14302d2da60cSJ. Bruce Fields 14312d2da60cSJ. Bruce Fields static inline int 14322d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14339f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14349f06c719SChuck Lever __be32 *p, void *obj) 14352d2da60cSJ. Bruce Fields { 14362d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14372d2da60cSJ. Bruce Fields u32 offset; 14382d2da60cSJ. Bruce Fields u32 maj_stat; 14392d2da60cSJ. Bruce Fields int status; 1440d8ed029dSAlexey Dobriyan __be32 *opaque_len; 14412d2da60cSJ. Bruce Fields struct page **inpages; 14422d2da60cSJ. Bruce Fields int first; 14432d2da60cSJ. Bruce Fields int pad; 14442d2da60cSJ. Bruce Fields struct kvec *iov; 14452d2da60cSJ. Bruce Fields char *tmp; 14462d2da60cSJ. Bruce Fields 14472d2da60cSJ. Bruce Fields opaque_len = p++; 14482d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14492d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14502d2da60cSJ. Bruce Fields 14519f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14522d2da60cSJ. Bruce Fields 14532d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 14542d2da60cSJ. Bruce Fields if (status) 14552d2da60cSJ. Bruce Fields return status; 14562d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14572d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 14582d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14592d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14607561042fSKevin Coffman /* 14617561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 14627561042fSKevin Coffman * head when wrapping: 14637561042fSKevin Coffman * 14647561042fSKevin Coffman * call_allocate() allocates twice the slack space required 14657561042fSKevin Coffman * by the authentication flavor to rq_callsize. 14667561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14677561042fSKevin Coffman */ 14682d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14692d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14702d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14712d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14722d2da60cSJ. Bruce Fields } 147300fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14747561042fSKevin Coffman /* slack space should prevent this ever happening: */ 14752d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 14762d2da60cSJ. Bruce Fields status = -EIO; 14772d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 14782d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 14792d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1480fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14812d2da60cSJ. Bruce Fields else if (maj_stat) 14822d2da60cSJ. Bruce Fields return status; 14832d2da60cSJ. Bruce Fields 14842d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 14852d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 14862d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 14872d2da60cSJ. Bruce Fields iov = snd_buf->tail; 14882d2da60cSJ. Bruce Fields else 14892d2da60cSJ. Bruce Fields iov = snd_buf->head; 14902d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 14912d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 14922d2da60cSJ. Bruce Fields memset(p, 0, pad); 14932d2da60cSJ. Bruce Fields iov->iov_len += pad; 14942d2da60cSJ. Bruce Fields snd_buf->len += pad; 14952d2da60cSJ. Bruce Fields 14962d2da60cSJ. Bruce Fields return 0; 14972d2da60cSJ. Bruce Fields } 14982d2da60cSJ. Bruce Fields 14991da177e4SLinus Torvalds static int 15001da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 15019f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 15021da177e4SLinus Torvalds { 1503a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15041da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15051da177e4SLinus Torvalds gc_base); 15061da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 15071da177e4SLinus Torvalds int status = -EIO; 15081da177e4SLinus Torvalds 1509632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 15101da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 15111da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 15121da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 15131da177e4SLinus Torvalds */ 15149f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15159f06c719SChuck Lever status = 0; 15161da177e4SLinus Torvalds goto out; 15171da177e4SLinus Torvalds } 15181da177e4SLinus Torvalds switch (gss_cred->gc_service) { 15191da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 15209f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15219f06c719SChuck Lever status = 0; 15221da177e4SLinus Torvalds break; 15231da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 152489f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 15251da177e4SLinus Torvalds break; 15261da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 152789f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 15281da177e4SLinus Torvalds break; 15291da177e4SLinus Torvalds } 15301da177e4SLinus Torvalds out: 15311da177e4SLinus Torvalds gss_put_ctx(ctx); 1532632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15331da177e4SLinus Torvalds return status; 15341da177e4SLinus Torvalds } 15351da177e4SLinus Torvalds 15361da177e4SLinus Torvalds static inline int 15371da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1538d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15391da177e4SLinus Torvalds { 15401da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15411da177e4SLinus Torvalds struct xdr_buf integ_buf; 15421da177e4SLinus Torvalds struct xdr_netobj mic; 15431da177e4SLinus Torvalds u32 data_offset, mic_offset; 15441da177e4SLinus Torvalds u32 integ_len; 15451da177e4SLinus Torvalds u32 maj_stat; 15461da177e4SLinus Torvalds int status = -EIO; 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 15491da177e4SLinus Torvalds if (integ_len & 3) 15501da177e4SLinus Torvalds return status; 15511da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15521da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 15531da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 15541da177e4SLinus Torvalds return status; 15551da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15561da177e4SLinus Torvalds return status; 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15591da177e4SLinus Torvalds mic_offset - data_offset)) 15601da177e4SLinus Torvalds return status; 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15631da177e4SLinus Torvalds return status; 15641da177e4SLinus Torvalds 156500fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15661da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1567fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15681da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15691da177e4SLinus Torvalds return status; 15701da177e4SLinus Torvalds return 0; 15711da177e4SLinus Torvalds } 15721da177e4SLinus Torvalds 15732d2da60cSJ. Bruce Fields static inline int 15742d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1575d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15762d2da60cSJ. Bruce Fields { 15772d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15782d2da60cSJ. Bruce Fields u32 offset; 15792d2da60cSJ. Bruce Fields u32 opaque_len; 15802d2da60cSJ. Bruce Fields u32 maj_stat; 15812d2da60cSJ. Bruce Fields int status = -EIO; 15822d2da60cSJ. Bruce Fields 15832d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 15842d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15852d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 15862d2da60cSJ. Bruce Fields return status; 15872d2da60cSJ. Bruce Fields /* remove padding: */ 15882d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 15892d2da60cSJ. Bruce Fields 159000fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 15912d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1592fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15932d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 15942d2da60cSJ. Bruce Fields return status; 15952d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 15962d2da60cSJ. Bruce Fields return status; 15972d2da60cSJ. Bruce Fields 15982d2da60cSJ. Bruce Fields return 0; 15992d2da60cSJ. Bruce Fields } 16002d2da60cSJ. Bruce Fields 1601bf269551SChuck Lever static int 1602bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1603bf269551SChuck Lever __be32 *p, void *obj) 1604bf269551SChuck Lever { 1605bf269551SChuck Lever struct xdr_stream xdr; 1606bf269551SChuck Lever 1607bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1608bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1609bf269551SChuck Lever } 16102d2da60cSJ. Bruce Fields 16111da177e4SLinus Torvalds static int 16121da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1613bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 16141da177e4SLinus Torvalds { 1615a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16161da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 16171da177e4SLinus Torvalds gc_base); 16181da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1619d8ed029dSAlexey Dobriyan __be32 *savedp = p; 16202d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 16212d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 16221da177e4SLinus Torvalds int status = -EIO; 16231da177e4SLinus Torvalds 16241da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 16251da177e4SLinus Torvalds goto out_decode; 16261da177e4SLinus Torvalds switch (gss_cred->gc_service) { 16271da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 16281da177e4SLinus Torvalds break; 16291da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 16301da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 16311da177e4SLinus Torvalds if (status) 16321da177e4SLinus Torvalds goto out; 16331da177e4SLinus Torvalds break; 16341da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 16352d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 16362d2da60cSJ. Bruce Fields if (status) 16372d2da60cSJ. Bruce Fields goto out; 16381da177e4SLinus Torvalds break; 16391da177e4SLinus Torvalds } 164024b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16411be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16422d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 16431da177e4SLinus Torvalds out_decode: 1644bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16451da177e4SLinus Torvalds out: 16461da177e4SLinus Torvalds gss_put_ctx(ctx); 1647632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1648632f0d05SChuck Lever task->tk_pid, __func__, status); 16491da177e4SLinus Torvalds return status; 16501da177e4SLinus Torvalds } 16511da177e4SLinus Torvalds 1652f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 16531da177e4SLinus Torvalds .owner = THIS_MODULE, 16541da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16551da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 16561da177e4SLinus Torvalds .create = gss_create, 16571da177e4SLinus Torvalds .destroy = gss_destroy, 16581da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 165980df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 166080df9d20SStanislav Kinsbursky .pipes_create = gss_pipes_dentries_create, 166180df9d20SStanislav Kinsbursky .pipes_destroy = gss_pipes_dentries_destroy, 16626a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16639568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 1664a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 16651da177e4SLinus Torvalds }; 16661da177e4SLinus Torvalds 1667f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 16681da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 16691da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1670fba3bad4STrond Myklebust .cr_init = gss_cred_init, 16715c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16721da177e4SLinus Torvalds .crmatch = gss_match, 16731da177e4SLinus Torvalds .crmarshal = gss_marshal, 16741da177e4SLinus Torvalds .crrefresh = gss_refresh, 16751da177e4SLinus Torvalds .crvalidate = gss_validate, 16761da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 16771da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 16781da177e4SLinus Torvalds }; 16791da177e4SLinus Torvalds 16800df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 16810df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 16826dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 16835c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16840df7fb74STrond Myklebust .crmatch = gss_match, 16850df7fb74STrond Myklebust .crmarshal = gss_marshal, 16860df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 16870df7fb74STrond Myklebust .crvalidate = gss_validate, 16880df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 16890df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 16900df7fb74STrond Myklebust }; 16910df7fb74STrond Myklebust 1692b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1693c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 16941da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 16951da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 169634769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 169734769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 169834769fc4S\"J. Bruce Fields\ }; 169934769fc4S\"J. Bruce Fields\ 1700b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1701c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 170234769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 170334769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 170434769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 17051da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 17061da177e4SLinus Torvalds }; 17071da177e4SLinus Torvalds 1708a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 1709a1db410dSStanislav Kinsbursky { 1710a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 1711a1db410dSStanislav Kinsbursky } 1712a1db410dSStanislav Kinsbursky 1713a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 1714a1db410dSStanislav Kinsbursky { 1715a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 1716a1db410dSStanislav Kinsbursky } 1717a1db410dSStanislav Kinsbursky 1718a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 1719a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 1720a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1721a1db410dSStanislav Kinsbursky }; 1722a1db410dSStanislav Kinsbursky 17231da177e4SLinus Torvalds /* 17241da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 17251da177e4SLinus Torvalds */ 17261da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 17271da177e4SLinus Torvalds { 17281da177e4SLinus Torvalds int err = 0; 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 17311da177e4SLinus Torvalds if (err) 17321da177e4SLinus Torvalds goto out; 17331da177e4SLinus Torvalds err = gss_svc_init(); 17341da177e4SLinus Torvalds if (err) 17351da177e4SLinus Torvalds goto out_unregister; 1736a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1737a1db410dSStanislav Kinsbursky if (err) 1738a1db410dSStanislav Kinsbursky goto out_svc_exit; 173979a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17401da177e4SLinus Torvalds return 0; 1741a1db410dSStanislav Kinsbursky out_svc_exit: 1742a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 17431da177e4SLinus Torvalds out_unregister: 17441da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 17451da177e4SLinus Torvalds out: 17461da177e4SLinus Torvalds return err; 17471da177e4SLinus Torvalds } 17481da177e4SLinus Torvalds 17491da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 17501da177e4SLinus Torvalds { 1751a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17521da177e4SLinus Torvalds gss_svc_shutdown(); 17531da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 1754bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds 175771afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 17581da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1759126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 1760126e216aSTrond Myklebust gss_expired_cred_retry_delay, 1761126e216aSTrond Myklebust uint, 0644); 1762126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1763126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 1764126e216aSTrond Myklebust 17651da177e4SLinus Torvalds module_init(init_rpcsec_gss) 17661da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1767