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; 80e726340aSTrond Myklebust struct net *net; 8134769fc4S\"J. Bruce Fields\ /* 8234769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 8334769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 8434769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 8534769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 8634769fc4S\"J. Bruce Fields\ */ 87c239d83bSStanislav Kinsbursky struct rpc_pipe *pipe[2]; 88bd4a3eb1STrond Myklebust const char *target_name; 891da177e4SLinus Torvalds }; 901da177e4SLinus Torvalds 9179a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 9279a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 9379a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 9479a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 95cf81939dS\"J. Bruce Fields\ 965d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 97b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 98b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1011da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1021da177e4SLinus Torvalds { 1031da177e4SLinus Torvalds atomic_inc(&ctx->count); 1041da177e4SLinus Torvalds return ctx; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static inline void 1081da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1115d28dc82STrond Myklebust gss_free_ctx(ctx); 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds 1145d28dc82STrond Myklebust /* gss_cred_set_ctx: 1155d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1165d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1179beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1185d28dc82STrond Myklebust */ 1191da177e4SLinus Torvalds static void 1201da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1235d28dc82STrond Myklebust 124cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 125cd019f75STrond Myklebust return; 1267b6962b0STrond Myklebust gss_get_ctx(ctx); 127cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 128fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 129cd019f75STrond Myklebust smp_mb__before_clear_bit(); 130fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds static const void * 1341da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1371da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1381da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1391da177e4SLinus Torvalds memcpy(res, p, len); 1401da177e4SLinus Torvalds return q; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static inline const void * 1441da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds const void *q; 1471da177e4SLinus Torvalds unsigned int len; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1501da177e4SLinus Torvalds if (IS_ERR(p)) 1511da177e4SLinus Torvalds return p; 1521da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1531da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1541da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1550f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1561da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1571da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1581da177e4SLinus Torvalds dest->len = len; 1591da177e4SLinus Torvalds return q; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds static struct gss_cl_ctx * 1631da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1661da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1671da177e4SLinus Torvalds 1685d28dc82STrond Myklebust rcu_read_lock(); 1691da177e4SLinus Torvalds if (gss_cred->gc_ctx) 1701da177e4SLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1715d28dc82STrond Myklebust rcu_read_unlock(); 1721da177e4SLinus Torvalds return ctx; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static struct gss_cl_ctx * 1761da177e4SLinus Torvalds gss_alloc_context(void) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1791da177e4SLinus Torvalds 1800f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1811da177e4SLinus Torvalds if (ctx != NULL) { 1821da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1831da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1841da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1851da177e4SLinus Torvalds atomic_set(&ctx->count,1); 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds return ctx; 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1911da177e4SLinus Torvalds static const void * 1921da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds const void *q; 1951da177e4SLinus Torvalds unsigned int seclen; 1961da177e4SLinus Torvalds unsigned int timeout; 197620038f6SAndy Adamson unsigned long now = jiffies; 1981da177e4SLinus Torvalds u32 window_size; 1991da177e4SLinus Torvalds int ret; 2001da177e4SLinus Torvalds 201620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 202620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 203620038f6SAndy Adamson * the -t value passed to GSSD. 204620038f6SAndy Adamson */ 2051da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2061da177e4SLinus Torvalds if (IS_ERR(p)) 2071da177e4SLinus Torvalds goto err; 2081da177e4SLinus Torvalds if (timeout == 0) 2091da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 210620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 211620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 212620038f6SAndy Adamson * simultaneous requests 213620038f6SAndy Adamson */ 2141da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2151da177e4SLinus Torvalds if (IS_ERR(p)) 2161da177e4SLinus Torvalds goto err; 2171da177e4SLinus Torvalds ctx->gc_win = window_size; 2181da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2191da177e4SLinus Torvalds if (ctx->gc_win == 0) { 220dc5ddce9SJeff Layton /* 221dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 222dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 223dc5ddce9SJeff Layton */ 224dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 225dc5ddce9SJeff Layton if (!IS_ERR(p)) 226dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 227dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2281da177e4SLinus Torvalds goto err; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds /* copy the opaque wire context */ 2311da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2321da177e4SLinus Torvalds if (IS_ERR(p)) 2331da177e4SLinus Torvalds goto err; 2341da177e4SLinus Torvalds /* import the opaque security context */ 2351da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2361da177e4SLinus Torvalds if (IS_ERR(p)) 2371da177e4SLinus Torvalds goto err; 2381da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2391da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2401da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2411da177e4SLinus Torvalds goto err; 2421da177e4SLinus Torvalds } 243400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2441da177e4SLinus Torvalds if (ret < 0) { 2451da177e4SLinus Torvalds p = ERR_PTR(ret); 2461da177e4SLinus Torvalds goto err; 2471da177e4SLinus Torvalds } 248620038f6SAndy Adamson dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", 249620038f6SAndy Adamson __func__, ctx->gc_expiry, now, timeout); 2501da177e4SLinus Torvalds return q; 2511da177e4SLinus Torvalds err: 252173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2531da177e4SLinus Torvalds return p; 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 25634769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds struct gss_upcall_msg { 2591da177e4SLinus Torvalds atomic_t count; 2607eaf040bSEric W. Biederman kuid_t uid; 2611da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2621da177e4SLinus Torvalds struct list_head list; 2631da177e4SLinus Torvalds struct gss_auth *auth; 2649beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2651da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2661da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2671da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 26834769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2691da177e4SLinus Torvalds }; 2701da177e4SLinus Torvalds 2712aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 27279a3f20bS\"J. Bruce Fields\ { 2732aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 27479a3f20bS\"J. Bruce Fields\ int ret; 27579a3f20bS\"J. Bruce Fields\ 27679a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 2772aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 2782aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 2792aed8b47STrond Myklebust ret = sn->pipe_version; 28079a3f20bS\"J. Bruce Fields\ } else 28179a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 28279a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28379a3f20bS\"J. Bruce Fields\ return ret; 28479a3f20bS\"J. Bruce Fields\ } 28579a3f20bS\"J. Bruce Fields\ 2862aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 28779a3f20bS\"J. Bruce Fields\ { 2882aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 2892aed8b47STrond Myklebust 2902aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 2912aed8b47STrond Myklebust sn->pipe_version = -1; 29279a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 29379a3f20bS\"J. Bruce Fields\ } 29479a3f20bS\"J. Bruce Fields\ } 29579a3f20bS\"J. Bruce Fields\ 2961da177e4SLinus Torvalds static void 2971da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 2981da177e4SLinus Torvalds { 299e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3001da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 3011da177e4SLinus Torvalds return; 3022aed8b47STrond Myklebust put_pipe_version(net); 3031da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3041da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3051da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 306f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3071da177e4SLinus Torvalds kfree(gss_msg); 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds static struct gss_upcall_msg * 3117eaf040bSEric W. Biederman __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3121da177e4SLinus Torvalds { 3131da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3149beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3150b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3161da177e4SLinus Torvalds continue; 3171da177e4SLinus Torvalds atomic_inc(&pos->count); 318632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3191da177e4SLinus Torvalds return pos; 3201da177e4SLinus Torvalds } 321632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3221da177e4SLinus Torvalds return NULL; 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 325720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3261da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3271da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3281da177e4SLinus Torvalds */ 3291da177e4SLinus Torvalds static inline struct gss_upcall_msg * 330053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3311da177e4SLinus Torvalds { 3329beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3331da177e4SLinus Torvalds struct gss_upcall_msg *old; 3341da177e4SLinus Torvalds 3359beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3369beae467SStanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3371da177e4SLinus Torvalds if (old == NULL) { 3381da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3399beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3401da177e4SLinus Torvalds } else 3411da177e4SLinus Torvalds gss_msg = old; 3429beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3431da177e4SLinus Torvalds return gss_msg; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds static void 3471da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3481da177e4SLinus Torvalds { 3491da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3501da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3511da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3521da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds static void 3561da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3571da177e4SLinus Torvalds { 3589beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3591da177e4SLinus Torvalds 3603b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3613b68aaeaSTrond Myklebust return; 3629beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3633b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3641da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3659beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds static void 369126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 370126e216aSTrond Myklebust { 371126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 372126e216aSTrond Myklebust case 0: 373126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 374126e216aSTrond Myklebust break; 375126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 376126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 377126e216aSTrond Myklebust break; 378126e216aSTrond Myklebust case -EKEYEXPIRED: 379126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 380126e216aSTrond Myklebust } 381126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 382126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 383126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 384126e216aSTrond Myklebust } 385126e216aSTrond Myklebust 386126e216aSTrond Myklebust static void 3871da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 3881da177e4SLinus Torvalds { 389a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 3901da177e4SLinus Torvalds struct gss_cred, gc_base); 3911da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3929beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3931da177e4SLinus Torvalds 3949beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 395126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 3969beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 397126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 3981da177e4SLinus Torvalds gss_release_msg(gss_msg); 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 40134769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 40234769fc4S\"J. Bruce Fields\ { 40390602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 40490602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 40590602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 40690602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 40790602c7bSEric W. Biederman BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); 40834769fc4S\"J. Bruce Fields\ } 40934769fc4S\"J. Bruce Fields\ 4108b1c7bf5SOlga Kornievskaia static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 411bd4a3eb1STrond Myklebust const char *service_name, 412bd4a3eb1STrond Myklebust const char *target_name) 41334769fc4S\"J. Bruce Fields\ { 414683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4158b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4168b1c7bf5SOlga Kornievskaia int len = 0; 4178b1c7bf5SOlga Kornievskaia 4188b1c7bf5SOlga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 419683ac665STrond Myklebust mech->gm_name, 42090602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4218b1c7bf5SOlga Kornievskaia p += gss_msg->msg.len; 422bd4a3eb1STrond Myklebust if (target_name) { 423bd4a3eb1STrond Myklebust len = sprintf(p, "target=%s ", target_name); 4248b1c7bf5SOlga Kornievskaia p += len; 4258b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4268b1c7bf5SOlga Kornievskaia } 42768c97153STrond Myklebust if (service_name != NULL) { 42868c97153STrond Myklebust len = sprintf(p, "service=%s ", service_name); 4292efef708SOlga Kornievskaia p += len; 4302efef708SOlga Kornievskaia gss_msg->msg.len += len; 4312efef708SOlga Kornievskaia } 432683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 433f8628220SKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 434683ac665STrond Myklebust p += len; 435683ac665STrond Myklebust gss_msg->msg.len += len; 436683ac665STrond Myklebust } 4378b1c7bf5SOlga Kornievskaia len = sprintf(p, "\n"); 4388b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4398b1c7bf5SOlga Kornievskaia 44034769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 44134769fc4S\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 44234769fc4S\"J. Bruce Fields\ } 44334769fc4S\"J. Bruce Fields\ 44468c97153STrond Myklebust static struct gss_upcall_msg * 445e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 4467eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4471da177e4SLinus Torvalds { 4481da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 44979a3f20bS\"J. Bruce Fields\ int vers; 4501da177e4SLinus Torvalds 4510f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 452db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 453db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 454e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 45579a3f20bS\"J. Bruce Fields\ if (vers < 0) { 45679a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 45779a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 45879a3f20bS\"J. Bruce Fields\ } 459c239d83bSStanislav Kinsbursky gss_msg->pipe = gss_auth->pipe[vers]; 4601da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 4611da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 4621da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 4631da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 4641da177e4SLinus Torvalds gss_msg->uid = uid; 4651da177e4SLinus Torvalds gss_msg->auth = gss_auth; 466bd4a3eb1STrond Myklebust switch (vers) { 467bd4a3eb1STrond Myklebust case 0: 468bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 469bd4a3eb1STrond Myklebust default: 470bd4a3eb1STrond Myklebust gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 471bd4a3eb1STrond Myklebust }; 4721da177e4SLinus Torvalds return gss_msg; 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds static struct gss_upcall_msg * 476e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 4771da177e4SLinus Torvalds { 4787c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4797c67db3aSTrond Myklebust struct gss_cred, gc_base); 4801da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4817eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 4821da177e4SLinus Torvalds 483e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 484db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 485db75b3d6S\"J. Bruce Fields\ return gss_new; 486053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 4871da177e4SLinus Torvalds if (gss_msg == gss_new) { 4889beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4891da177e4SLinus Torvalds if (res) { 4901da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4911da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds } else 4941da177e4SLinus Torvalds gss_release_msg(gss_new); 4951da177e4SLinus Torvalds return gss_msg; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 498b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 499b03568c3S\"J. Bruce Fields\ { 500b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 501b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 502b03568c3S\"J. Bruce Fields\ 503b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 504b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 505b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 506b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 507b03568c3S\"J. Bruce Fields\ } 508b03568c3S\"J. Bruce Fields\ } 509b03568c3S\"J. Bruce Fields\ 5101da177e4SLinus Torvalds static inline int 5111da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5121da177e4SLinus Torvalds { 513a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5144a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5151da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5161da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5171da177e4SLinus Torvalds struct gss_cred, gc_base); 5181da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5199beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5201da177e4SLinus Torvalds int err = 0; 5211da177e4SLinus Torvalds 522632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 523cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 524e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 525480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 52679a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 52779a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 52879a3f20bS\"J. Bruce Fields\ warn_gssd(); 52979a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 53079a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 531d1a8016aSBryan Schumaker return -EAGAIN; 53279a3f20bS\"J. Bruce Fields\ } 5331da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5341da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5351da177e4SLinus Torvalds goto out; 5361da177e4SLinus Torvalds } 5379beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5389beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5391da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5405d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 541126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5421da177e4SLinus Torvalds task->tk_timeout = 0; 5431da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5441da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5451da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5465d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 547126e216aSTrond Myklebust } else { 548126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5491da177e4SLinus Torvalds err = gss_msg->msg.errno; 550126e216aSTrond Myklebust } 5519beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5521da177e4SLinus Torvalds gss_release_msg(gss_msg); 5531da177e4SLinus Torvalds out: 554632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 555cdba321eSEric W. Biederman task->tk_pid, __func__, 556cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 5571da177e4SLinus Torvalds return err; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds static inline int 5611da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5621da177e4SLinus Torvalds { 563e726340aSTrond Myklebust struct net *net = gss_auth->net; 564abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 5659beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5661da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5671da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 568abfdbd53STrond Myklebust unsigned long timeout; 5691da177e4SLinus Torvalds DEFINE_WAIT(wait); 570d36ccb9cSTrond Myklebust int err; 5711da177e4SLinus Torvalds 572cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 573cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 57479a3f20bS\"J. Bruce Fields\ retry: 575d36ccb9cSTrond Myklebust err = 0; 576abfdbd53STrond Myklebust /* Default timeout is 15s unless we know that gssd is not running */ 577abfdbd53STrond Myklebust timeout = 15 * HZ; 578abfdbd53STrond Myklebust if (!sn->gssd_running) 579abfdbd53STrond Myklebust timeout = HZ >> 2; 580e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 58179a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 58279a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 5832aed8b47STrond Myklebust sn->pipe_version >= 0, timeout); 5842aed8b47STrond Myklebust if (sn->pipe_version < 0) { 585abfdbd53STrond Myklebust if (err == 0) 586abfdbd53STrond Myklebust sn->gssd_running = 0; 587d1a8016aSBryan Schumaker warn_gssd(); 588d1a8016aSBryan Schumaker err = -EACCES; 589d1a8016aSBryan Schumaker } 590d36ccb9cSTrond Myklebust if (err < 0) 59179a3f20bS\"J. Bruce Fields\ goto out; 59279a3f20bS\"J. Bruce Fields\ goto retry; 59379a3f20bS\"J. Bruce Fields\ } 5941da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5951da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5961da177e4SLinus Torvalds goto out; 5971da177e4SLinus Torvalds } 5989beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5991da177e4SLinus Torvalds for (;;) { 6005afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6019beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6021da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6031da177e4SLinus Torvalds break; 6041da177e4SLinus Torvalds } 6059beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6065afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6071da177e4SLinus Torvalds err = -ERESTARTSYS; 6081da177e4SLinus Torvalds goto out_intr; 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds schedule(); 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds if (gss_msg->ctx) 6137b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6141da177e4SLinus Torvalds else 6151da177e4SLinus Torvalds err = gss_msg->msg.errno; 6169beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6171da177e4SLinus Torvalds out_intr: 6181da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6191da177e4SLinus Torvalds gss_release_msg(gss_msg); 6201da177e4SLinus Torvalds out: 621632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 622cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6231da177e4SLinus Torvalds return err; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds static ssize_t 6291da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6301da177e4SLinus Torvalds { 6311da177e4SLinus Torvalds const void *p, *end; 6321da177e4SLinus Torvalds void *buf; 6331da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 634496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6351da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 63690602c7bSEric W. Biederman uid_t id; 63790602c7bSEric W. Biederman kuid_t uid; 6383b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6411da177e4SLinus Torvalds goto out; 6421da177e4SLinus Torvalds err = -ENOMEM; 6430f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6441da177e4SLinus Torvalds if (!buf) 6451da177e4SLinus Torvalds goto out; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds err = -EFAULT; 6481da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6491da177e4SLinus Torvalds goto err; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 65290602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6531da177e4SLinus Torvalds if (IS_ERR(p)) { 6541da177e4SLinus Torvalds err = PTR_ERR(p); 6551da177e4SLinus Torvalds goto err; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds 65890602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 65990602c7bSEric W. Biederman if (!uid_valid(uid)) { 66090602c7bSEric W. Biederman err = -EINVAL; 66190602c7bSEric W. Biederman goto err; 66290602c7bSEric W. Biederman } 66390602c7bSEric W. Biederman 6641da177e4SLinus Torvalds err = -ENOMEM; 6651da177e4SLinus Torvalds ctx = gss_alloc_context(); 6661da177e4SLinus Torvalds if (ctx == NULL) 6671da177e4SLinus Torvalds goto err; 6683b68aaeaSTrond Myklebust 6693b68aaeaSTrond Myklebust err = -ENOENT; 6703b68aaeaSTrond Myklebust /* Find a matching upcall */ 6719beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6729beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6733b68aaeaSTrond Myklebust if (gss_msg == NULL) { 6749beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6753b68aaeaSTrond Myklebust goto err_put_ctx; 6763b68aaeaSTrond Myklebust } 6773b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 6789beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6793b68aaeaSTrond Myklebust 6806e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6811da177e4SLinus Torvalds if (IS_ERR(p)) { 6821da177e4SLinus Torvalds err = PTR_ERR(p); 683486bad2eSJeff Layton switch (err) { 684486bad2eSJeff Layton case -EACCES: 685dc5ddce9SJeff Layton case -EKEYEXPIRED: 686486bad2eSJeff Layton gss_msg->msg.errno = err; 687486bad2eSJeff Layton err = mlen; 688486bad2eSJeff Layton break; 689486bad2eSJeff Layton case -EFAULT: 690486bad2eSJeff Layton case -ENOMEM: 691486bad2eSJeff Layton case -EINVAL: 692486bad2eSJeff Layton case -ENOSYS: 693486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 694486bad2eSJeff Layton break; 695486bad2eSJeff Layton default: 696486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 6976c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 698486bad2eSJeff Layton BUG(); 699486bad2eSJeff Layton } 7003b68aaeaSTrond Myklebust goto err_release_msg; 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7033b68aaeaSTrond Myklebust err = mlen; 7043b68aaeaSTrond Myklebust 7053b68aaeaSTrond Myklebust err_release_msg: 7069beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7071da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7089beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7091da177e4SLinus Torvalds gss_release_msg(gss_msg); 7101da177e4SLinus Torvalds err_put_ctx: 7111da177e4SLinus Torvalds gss_put_ctx(ctx); 7121da177e4SLinus Torvalds err: 7131da177e4SLinus Torvalds kfree(buf); 7141da177e4SLinus Torvalds out: 715632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7161da177e4SLinus Torvalds return err; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds 71934769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 720cf81939dS\"J. Bruce Fields\ { 7212aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7222aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 72334769fc4S\"J. Bruce Fields\ int ret = 0; 72434769fc4S\"J. Bruce Fields\ 72579a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 7262aed8b47STrond Myklebust if (sn->pipe_version < 0) { 72734769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 7282aed8b47STrond Myklebust sn->pipe_version = new_version; 72979a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 73079a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 7312aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 73234769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 73334769fc4S\"J. Bruce Fields\ ret = -EBUSY; 73434769fc4S\"J. Bruce Fields\ goto out; 73579a3f20bS\"J. Bruce Fields\ } 7362aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 73734769fc4S\"J. Bruce Fields\ out: 73879a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 73934769fc4S\"J. Bruce Fields\ return ret; 74034769fc4S\"J. Bruce Fields\ 74134769fc4S\"J. Bruce Fields\ } 74234769fc4S\"J. Bruce Fields\ 74334769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 74434769fc4S\"J. Bruce Fields\ { 74534769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 74634769fc4S\"J. Bruce Fields\ } 74734769fc4S\"J. Bruce Fields\ 74834769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 74934769fc4S\"J. Bruce Fields\ { 75034769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 751cf81939dS\"J. Bruce Fields\ } 752cf81939dS\"J. Bruce Fields\ 7531da177e4SLinus Torvalds static void 7541da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 7551da177e4SLinus Torvalds { 7562aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 7579beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7581da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 7591da177e4SLinus Torvalds 7605a67657aSTrond Myklebust restart: 7619beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7629beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7636e84c7b6STrond Myklebust 7645a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7655a67657aSTrond Myklebust continue; 7661da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 7671da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7681da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7699beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7701da177e4SLinus Torvalds gss_release_msg(gss_msg); 7715a67657aSTrond Myklebust goto restart; 7721da177e4SLinus Torvalds } 7739beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 774cf81939dS\"J. Bruce Fields\ 7752aed8b47STrond Myklebust put_pipe_version(net); 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds static void 7791da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds if (msg->errno < 0) { 784632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 785632f0d05SChuck Lever __func__, gss_msg); 7861da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7871da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 788b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 789b03568c3S\"J. Bruce Fields\ warn_gssd(); 7901da177e4SLinus Torvalds gss_release_msg(gss_msg); 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 794ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy(struct rpc_auth *auth) 795ccdc28f8SStanislav Kinsbursky { 796ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 797ccdc28f8SStanislav Kinsbursky 798ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 79980df9d20SStanislav Kinsbursky if (gss_auth->pipe[0]->dentry) 800ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[0]->dentry); 80180df9d20SStanislav Kinsbursky if (gss_auth->pipe[1]->dentry) 802ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 803ccdc28f8SStanislav Kinsbursky } 804ccdc28f8SStanislav Kinsbursky 805ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create(struct rpc_auth *auth) 806ccdc28f8SStanislav Kinsbursky { 807ccdc28f8SStanislav Kinsbursky int err; 808ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 809ccdc28f8SStanislav Kinsbursky struct rpc_clnt *clnt; 810ccdc28f8SStanislav Kinsbursky 811ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 812ccdc28f8SStanislav Kinsbursky clnt = gss_auth->client; 813ccdc28f8SStanislav Kinsbursky 81430507f58SStanislav Kinsbursky gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 815ccdc28f8SStanislav Kinsbursky "gssd", 816ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[1]); 817ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1]->dentry)) 818ccdc28f8SStanislav Kinsbursky return PTR_ERR(gss_auth->pipe[1]->dentry); 81930507f58SStanislav Kinsbursky gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 820ccdc28f8SStanislav Kinsbursky gss_auth->mech->gm_name, 821ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[0]); 822ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0]->dentry)) { 823ccdc28f8SStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]->dentry); 824ccdc28f8SStanislav Kinsbursky goto err_unlink_pipe_1; 825ccdc28f8SStanislav Kinsbursky } 826ccdc28f8SStanislav Kinsbursky return 0; 827ccdc28f8SStanislav Kinsbursky 828ccdc28f8SStanislav Kinsbursky err_unlink_pipe_1: 829ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 830ccdc28f8SStanislav Kinsbursky return err; 831ccdc28f8SStanislav Kinsbursky } 832ccdc28f8SStanislav Kinsbursky 833ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, 834ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 835ccdc28f8SStanislav Kinsbursky { 836e726340aSTrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, 837e726340aSTrond Myklebust rpc_auth); 838e726340aSTrond Myklebust struct net *net = gss_auth->net; 839ccdc28f8SStanislav Kinsbursky struct super_block *sb; 840ccdc28f8SStanislav Kinsbursky 841ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 842ccdc28f8SStanislav Kinsbursky if (sb) { 84330507f58SStanislav Kinsbursky if (clnt->cl_dentry) 844ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy(auth); 845ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 846ccdc28f8SStanislav Kinsbursky } 847ccdc28f8SStanislav Kinsbursky } 848ccdc28f8SStanislav Kinsbursky 849ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, 850ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 851ccdc28f8SStanislav Kinsbursky { 852e726340aSTrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, 853e726340aSTrond Myklebust rpc_auth); 854e726340aSTrond Myklebust struct net *net = gss_auth->net; 855ccdc28f8SStanislav Kinsbursky struct super_block *sb; 856ccdc28f8SStanislav Kinsbursky int err = 0; 857ccdc28f8SStanislav Kinsbursky 858ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 859ccdc28f8SStanislav Kinsbursky if (sb) { 86030507f58SStanislav Kinsbursky if (clnt->cl_dentry) 861ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create(auth); 862ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 863ccdc28f8SStanislav Kinsbursky } 864ccdc28f8SStanislav Kinsbursky return err; 865ccdc28f8SStanislav Kinsbursky } 866ccdc28f8SStanislav Kinsbursky 8671da177e4SLinus Torvalds /* 8681da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 8691da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8701da177e4SLinus Torvalds */ 8711da177e4SLinus Torvalds static struct rpc_auth * 872c2190661STrond Myklebust gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 8731da177e4SLinus Torvalds { 874c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 8751da177e4SLinus Torvalds struct gss_auth *gss_auth; 8761da177e4SLinus Torvalds struct rpc_auth * auth; 8776a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 8826a19275aSJ. Bruce Fields return ERR_PTR(err); 8831da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8841da177e4SLinus Torvalds goto out_dec; 885bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 886c2190661STrond Myklebust if (args->target_name) { 887c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 888bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 889bd4a3eb1STrond Myklebust goto err_free; 890bd4a3eb1STrond Myklebust } 8911da177e4SLinus Torvalds gss_auth->client = clnt; 892e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 8936a19275aSJ. Bruce Fields err = -EINVAL; 8941da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 8951da177e4SLinus Torvalds if (!gss_auth->mech) { 8969b1d75b7STrond Myklebust dprintk("RPC: Pseudoflavor %d not found!\n", flavor); 897e726340aSTrond Myklebust goto err_put_net; 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 900438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 901438b6fdeSJ. Bruce Fields goto err_put_mech; 9021da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 9031da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 9041da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 9051da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 9061da177e4SLinus Torvalds auth->au_flavor = flavor; 9071da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 9080285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 9091da177e4SLinus Torvalds 91034769fc4S\"J. Bruce Fields\ /* 91134769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 91234769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 91334769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 91434769fc4S\"J. Bruce Fields\ * the new pipe first. 91534769fc4S\"J. Bruce Fields\ */ 916c239d83bSStanislav Kinsbursky gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1, 91734769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 918c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1])) { 919c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[1]); 9201da177e4SLinus Torvalds goto err_put_mech; 9216a19275aSJ. Bruce Fields } 9221da177e4SLinus Torvalds 923c239d83bSStanislav Kinsbursky gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0, 92434769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 925c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0])) { 926c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]); 927c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 928c239d83bSStanislav Kinsbursky } 929ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create_net(clnt, auth); 930ccdc28f8SStanislav Kinsbursky if (err) 931c239d83bSStanislav Kinsbursky goto err_destroy_pipe_0; 932f5c2187cSTrond Myklebust err = rpcauth_init_credcache(auth); 93307a2bf1dSTrond Myklebust if (err) 934ccdc28f8SStanislav Kinsbursky goto err_unlink_pipes; 93507a2bf1dSTrond Myklebust 9361da177e4SLinus Torvalds return auth; 937ccdc28f8SStanislav Kinsbursky err_unlink_pipes: 938ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(clnt, auth); 939c239d83bSStanislav Kinsbursky err_destroy_pipe_0: 940c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 941c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 942c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9431da177e4SLinus Torvalds err_put_mech: 9441da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 945e726340aSTrond Myklebust err_put_net: 946e726340aSTrond Myklebust put_net(gss_auth->net); 9471da177e4SLinus Torvalds err_free: 948bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 9491da177e4SLinus Torvalds kfree(gss_auth); 9501da177e4SLinus Torvalds out_dec: 9511da177e4SLinus Torvalds module_put(THIS_MODULE); 9526a19275aSJ. Bruce Fields return ERR_PTR(err); 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds static void 9560285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 9570285ed1fSTrond Myklebust { 958ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); 959c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 960c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9610285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 962e726340aSTrond Myklebust put_net(gss_auth->net); 963bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 9640285ed1fSTrond Myklebust 9650285ed1fSTrond Myklebust kfree(gss_auth); 9660285ed1fSTrond Myklebust module_put(THIS_MODULE); 9670285ed1fSTrond Myklebust } 9680285ed1fSTrond Myklebust 9690285ed1fSTrond Myklebust static void 9700285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 9710285ed1fSTrond Myklebust { 9720285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9730285ed1fSTrond Myklebust 9740285ed1fSTrond Myklebust gss_free(gss_auth); 9750285ed1fSTrond Myklebust } 9760285ed1fSTrond Myklebust 9770285ed1fSTrond Myklebust static void 9781da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 9791da177e4SLinus Torvalds { 9801da177e4SLinus Torvalds struct gss_auth *gss_auth; 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9831da177e4SLinus Torvalds auth, auth->au_flavor); 9841da177e4SLinus Torvalds 9853ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 9863ab9bb72STrond Myklebust 9871da177e4SLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 9880285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds 9910df7fb74STrond Myklebust /* 9920df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 9930df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 9940df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 9950df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 9960df7fb74STrond Myklebust */ 9970df7fb74STrond Myklebust static int 9980df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 9990df7fb74STrond Myklebust { 10000df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10010df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10020df7fb74STrond Myklebust struct rpc_task *task; 10030df7fb74STrond Myklebust 10040df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 10056dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 10060df7fb74STrond Myklebust return 0; 10070df7fb74STrond Myklebust 10080df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 10090df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 10100df7fb74STrond Myklebust 10110df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 10120df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 10130df7fb74STrond Myklebust get_rpccred(cred); 10140df7fb74STrond Myklebust 1015080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 10160df7fb74STrond Myklebust if (!IS_ERR(task)) 10170df7fb74STrond Myklebust rpc_put_task(task); 10180df7fb74STrond Myklebust 10190df7fb74STrond Myklebust put_rpccred(cred); 10200df7fb74STrond Myklebust return 1; 10210df7fb74STrond Myklebust } 10220df7fb74STrond Myklebust 10230df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 10241da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 10251da177e4SLinus Torvalds * allocated before freeing them. */ 10261da177e4SLinus Torvalds static void 10275d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 10281da177e4SLinus Torvalds { 1029632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 10301da177e4SLinus Torvalds 10310d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 10321da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 10331da177e4SLinus Torvalds kfree(ctx); 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds static void 10375d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 10385d28dc82STrond Myklebust { 10395d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 10405d28dc82STrond Myklebust gss_do_free_ctx(ctx); 10415d28dc82STrond Myklebust } 10425d28dc82STrond Myklebust 10435d28dc82STrond Myklebust static void 10445d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 10455d28dc82STrond Myklebust { 10465d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10475d28dc82STrond Myklebust } 10485d28dc82STrond Myklebust 10495d28dc82STrond Myklebust static void 105031be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 10511da177e4SLinus Torvalds { 1052632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 105331be5bf1STrond Myklebust kfree(gss_cred); 105431be5bf1STrond Myklebust } 10551da177e4SLinus Torvalds 105631be5bf1STrond Myklebust static void 105731be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 105831be5bf1STrond Myklebust { 105931be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 106031be5bf1STrond Myklebust gss_free_cred(gss_cred); 106131be5bf1STrond Myklebust } 10621da177e4SLinus Torvalds 106331be5bf1STrond Myklebust static void 10646dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 106531be5bf1STrond Myklebust { 10665d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10670285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10685d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10695d28dc82STrond Myklebust 1070a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 107131be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10725d28dc82STrond Myklebust if (ctx) 10735d28dc82STrond Myklebust gss_put_ctx(ctx); 10740285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds 10776dcd3926SJeff Layton static void 10786dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 10796dcd3926SJeff Layton { 10806dcd3926SJeff Layton 10816dcd3926SJeff Layton if (gss_destroying_context(cred)) 10826dcd3926SJeff Layton return; 10836dcd3926SJeff Layton gss_destroy_nullcred(cred); 10846dcd3926SJeff Layton } 10856dcd3926SJeff Layton 10861da177e4SLinus Torvalds /* 10871da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 10881da177e4SLinus Torvalds */ 10891da177e4SLinus Torvalds static struct rpc_cred * 10908a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10911da177e4SLinus Torvalds { 10928a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds static struct rpc_cred * 10968a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10971da177e4SLinus Torvalds { 10981da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 10991da177e4SLinus Torvalds struct gss_cred *cred = NULL; 11001da177e4SLinus Torvalds int err = -ENOMEM; 11011da177e4SLinus Torvalds 1102632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1103cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1104cdba321eSEric W. Biederman auth->au_flavor); 11051da177e4SLinus Torvalds 11060f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 11071da177e4SLinus Torvalds goto out_err; 11081da177e4SLinus Torvalds 11095fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 11101da177e4SLinus Torvalds /* 11111da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 11121da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 11131da177e4SLinus Torvalds */ 1114fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 11151da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 111668c97153STrond Myklebust cred->gc_principal = NULL; 111768c97153STrond Myklebust if (acred->machine_cred) 111868c97153STrond Myklebust cred->gc_principal = acred->principal; 11190285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 11201da177e4SLinus Torvalds return &cred->gc_base; 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds out_err: 1123632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 11241da177e4SLinus Torvalds return ERR_PTR(err); 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds static int 1128fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1129fba3bad4STrond Myklebust { 1130fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1131fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1132fba3bad4STrond Myklebust int err; 1133fba3bad4STrond Myklebust 1134fba3bad4STrond Myklebust do { 1135fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1136fba3bad4STrond Myklebust } while (err == -EAGAIN); 1137fba3bad4STrond Myklebust return err; 1138fba3bad4STrond Myklebust } 1139fba3bad4STrond Myklebust 1140fba3bad4STrond Myklebust static int 11418a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11441da177e4SLinus Torvalds 1145cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11468a317760STrond Myklebust goto out; 11471da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1148cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1149cd019f75STrond Myklebust return 0; 1150cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11511da177e4SLinus Torvalds return 0; 11528a317760STrond Myklebust out: 115368c97153STrond Myklebust if (acred->principal != NULL) { 115468c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 115568c97153STrond Myklebust return 0; 115668c97153STrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 115768c97153STrond Myklebust } 115868c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 11597c67db3aSTrond Myklebust return 0; 11600b4d51b0SEric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds /* 11641da177e4SLinus Torvalds * Marshal credentials. 11651da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 11661da177e4SLinus Torvalds */ 1167d8ed029dSAlexey Dobriyan static __be32 * 1168d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 11691da177e4SLinus Torvalds { 1170a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1171a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 11721da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11731da177e4SLinus Torvalds gc_base); 11741da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1175d8ed029dSAlexey Dobriyan __be32 *cred_len; 11761da177e4SLinus Torvalds u32 maj_stat = 0; 11771da177e4SLinus Torvalds struct xdr_netobj mic; 11781da177e4SLinus Torvalds struct kvec iov; 11791da177e4SLinus Torvalds struct xdr_buf verf_buf; 11801da177e4SLinus Torvalds 1181632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11821da177e4SLinus Torvalds 11831da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11841da177e4SLinus Torvalds cred_len = p++; 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 11871da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 11881da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 11891da177e4SLinus Torvalds 11901da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 11911da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 11921da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 11931da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 11941da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 11951da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 11981da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1199a4f0835cSTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1200808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 12011da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 12021da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 12031da177e4SLinus Torvalds 12041da177e4SLinus Torvalds /* set verifier flavor*/ 12051da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 12061da177e4SLinus Torvalds 12071da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 120800fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 12091da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1210fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12111da177e4SLinus Torvalds } else if (maj_stat != 0) { 12121da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 12131da177e4SLinus Torvalds goto out_put_ctx; 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 12161da177e4SLinus Torvalds gss_put_ctx(ctx); 12171da177e4SLinus Torvalds return p; 12181da177e4SLinus Torvalds out_put_ctx: 12191da177e4SLinus Torvalds gss_put_ctx(ctx); 12201da177e4SLinus Torvalds return NULL; 12211da177e4SLinus Torvalds } 12221da177e4SLinus Torvalds 1223cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1224cd019f75STrond Myklebust { 1225a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1226cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1227cd019f75STrond Myklebust struct gss_cred, 1228cd019f75STrond Myklebust gc_base); 1229cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1230cd019f75STrond Myklebust struct auth_cred acred = { 1231cd019f75STrond Myklebust .uid = oldcred->cr_uid, 123268c97153STrond Myklebust .principal = gss_cred->gc_principal, 123368c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1234cd019f75STrond Myklebust }; 1235cd019f75STrond Myklebust struct rpc_cred *new; 1236cd019f75STrond Myklebust 1237cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1238cd019f75STrond Myklebust if (IS_ERR(new)) 1239cd019f75STrond Myklebust return PTR_ERR(new); 1240a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1241cd019f75STrond Myklebust put_rpccred(oldcred); 1242cd019f75STrond Myklebust return 0; 1243cd019f75STrond Myklebust } 1244cd019f75STrond Myklebust 1245126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1246126e216aSTrond Myklebust { 1247126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1248126e216aSTrond Myklebust unsigned long now = jiffies; 1249126e216aSTrond Myklebust unsigned long begin, expire; 1250126e216aSTrond Myklebust struct gss_cred *gss_cred; 1251126e216aSTrond Myklebust 1252126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1253126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1254126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1255126e216aSTrond Myklebust 1256126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1257126e216aSTrond Myklebust return 1; 1258126e216aSTrond Myklebust } 1259126e216aSTrond Myklebust return 0; 1260126e216aSTrond Myklebust } 1261126e216aSTrond Myklebust 12621da177e4SLinus Torvalds /* 12631da177e4SLinus Torvalds * Refresh credentials. XXX - finish 12641da177e4SLinus Torvalds */ 12651da177e4SLinus Torvalds static int 12661da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 12671da177e4SLinus Torvalds { 1268a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1269cd019f75STrond Myklebust int ret = 0; 12701da177e4SLinus Torvalds 1271126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1272126e216aSTrond Myklebust return -EKEYEXPIRED; 1273126e216aSTrond Myklebust 1274cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1275cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1276cd019f75STrond Myklebust ret = gss_renew_cred(task); 1277cd019f75STrond Myklebust if (ret < 0) 1278cd019f75STrond Myklebust goto out; 1279a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1280cd019f75STrond Myklebust } 1281cd019f75STrond Myklebust 1282cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1283cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1284cd019f75STrond Myklebust out: 1285cd019f75STrond Myklebust return ret; 12861da177e4SLinus Torvalds } 12871da177e4SLinus Torvalds 12880df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 12890df7fb74STrond Myklebust static int 12900df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 12910df7fb74STrond Myklebust { 12920df7fb74STrond Myklebust return -EACCES; 12930df7fb74STrond Myklebust } 12940df7fb74STrond Myklebust 1295d8ed029dSAlexey Dobriyan static __be32 * 1296d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 12971da177e4SLinus Torvalds { 1298a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 12991da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1300d8ed029dSAlexey Dobriyan __be32 seq; 13011da177e4SLinus Torvalds struct kvec iov; 13021da177e4SLinus Torvalds struct xdr_buf verf_buf; 13031da177e4SLinus Torvalds struct xdr_netobj mic; 13041da177e4SLinus Torvalds u32 flav,len; 13051da177e4SLinus Torvalds u32 maj_stat; 13061da177e4SLinus Torvalds 1307632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds flav = ntohl(*p++); 13101da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 13111da177e4SLinus Torvalds goto out_bad; 13121da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 13131da177e4SLinus Torvalds goto out_bad; 13141da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 13151da177e4SLinus Torvalds iov.iov_base = &seq; 13161da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 13171da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 13181da177e4SLinus Torvalds mic.data = (u8 *)p; 13191da177e4SLinus Torvalds mic.len = len; 13201da177e4SLinus Torvalds 132100fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 13221da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1323fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13240df7fb74STrond Myklebust if (maj_stat) { 1325632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1326632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 13271da177e4SLinus Torvalds goto out_bad; 13280df7fb74STrond Myklebust } 132924b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 133024b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 13311be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 13321da177e4SLinus Torvalds gss_put_ctx(ctx); 1333632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1334632f0d05SChuck Lever task->tk_pid, __func__); 13351da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 13361da177e4SLinus Torvalds out_bad: 13371da177e4SLinus Torvalds gss_put_ctx(ctx); 1338632f0d05SChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 13391da177e4SLinus Torvalds return NULL; 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 13429f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13439f06c719SChuck Lever __be32 *p, void *obj) 13449f06c719SChuck Lever { 13459f06c719SChuck Lever struct xdr_stream xdr; 13469f06c719SChuck Lever 13479f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13489f06c719SChuck Lever encode(rqstp, &xdr, obj); 13499f06c719SChuck Lever } 13509f06c719SChuck Lever 13511da177e4SLinus Torvalds static inline int 13521da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13539f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13549f06c719SChuck Lever __be32 *p, void *obj) 13551da177e4SLinus Torvalds { 13561da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13571da177e4SLinus Torvalds struct xdr_buf integ_buf; 1358d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 13591da177e4SLinus Torvalds struct xdr_netobj mic; 1360d8ed029dSAlexey Dobriyan u32 offset; 1361d8ed029dSAlexey Dobriyan __be32 *q; 13621da177e4SLinus Torvalds struct kvec *iov; 13631da177e4SLinus Torvalds u32 maj_stat = 0; 13641da177e4SLinus Torvalds int status = -EIO; 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds integ_len = p++; 13671da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13681da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13691da177e4SLinus Torvalds 13709f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13731da177e4SLinus Torvalds offset, snd_buf->len - offset)) 13741da177e4SLinus Torvalds return status; 13751da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 13781da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13791da177e4SLinus Torvalds iov = snd_buf->tail; 13801da177e4SLinus Torvalds else 13811da177e4SLinus Torvalds iov = snd_buf->head; 13821da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 13831da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 13841da177e4SLinus Torvalds 138500fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13861da177e4SLinus Torvalds status = -EIO; /* XXX? */ 13871da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1388fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13891da177e4SLinus Torvalds else if (maj_stat) 13901da177e4SLinus Torvalds return status; 13911da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 13941da177e4SLinus Torvalds iov->iov_len += offset; 13951da177e4SLinus Torvalds snd_buf->len += offset; 13961da177e4SLinus Torvalds return 0; 13971da177e4SLinus Torvalds } 13981da177e4SLinus Torvalds 13992d2da60cSJ. Bruce Fields static void 14002d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 14012d2da60cSJ. Bruce Fields { 14022d2da60cSJ. Bruce Fields int i; 14032d2da60cSJ. Bruce Fields 14042d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 14052d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 14062d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 14072d2da60cSJ. Bruce Fields } 14082d2da60cSJ. Bruce Fields 14092d2da60cSJ. Bruce Fields static int 14102d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 14112d2da60cSJ. Bruce Fields { 14122d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14132d2da60cSJ. Bruce Fields int first, last, i; 14142d2da60cSJ. Bruce Fields 14152d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 14162d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 14172d2da60cSJ. Bruce Fields return 0; 14182d2da60cSJ. Bruce Fields } 14192d2da60cSJ. Bruce Fields 14202d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14212d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 14222d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 14232d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 14242d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 14252d2da60cSJ. Bruce Fields GFP_NOFS); 14262d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 14272d2da60cSJ. Bruce Fields goto out; 14282d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 14292d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 14302d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 14312d2da60cSJ. Bruce Fields goto out_free; 14322d2da60cSJ. Bruce Fields } 14332d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 14342d2da60cSJ. Bruce Fields return 0; 14352d2da60cSJ. Bruce Fields out_free: 1436cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1437cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 14382d2da60cSJ. Bruce Fields out: 14392d2da60cSJ. Bruce Fields return -EAGAIN; 14402d2da60cSJ. Bruce Fields } 14412d2da60cSJ. Bruce Fields 14422d2da60cSJ. Bruce Fields static inline int 14432d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14449f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14459f06c719SChuck Lever __be32 *p, void *obj) 14462d2da60cSJ. Bruce Fields { 14472d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14482d2da60cSJ. Bruce Fields u32 offset; 14492d2da60cSJ. Bruce Fields u32 maj_stat; 14502d2da60cSJ. Bruce Fields int status; 1451d8ed029dSAlexey Dobriyan __be32 *opaque_len; 14522d2da60cSJ. Bruce Fields struct page **inpages; 14532d2da60cSJ. Bruce Fields int first; 14542d2da60cSJ. Bruce Fields int pad; 14552d2da60cSJ. Bruce Fields struct kvec *iov; 14562d2da60cSJ. Bruce Fields char *tmp; 14572d2da60cSJ. Bruce Fields 14582d2da60cSJ. Bruce Fields opaque_len = p++; 14592d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14602d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14612d2da60cSJ. Bruce Fields 14629f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14632d2da60cSJ. Bruce Fields 14642d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 14652d2da60cSJ. Bruce Fields if (status) 14662d2da60cSJ. Bruce Fields return status; 14672d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14682d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 14692d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14702d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14717561042fSKevin Coffman /* 14727561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 14737561042fSKevin Coffman * head when wrapping: 14747561042fSKevin Coffman * 14757561042fSKevin Coffman * call_allocate() allocates twice the slack space required 14767561042fSKevin Coffman * by the authentication flavor to rq_callsize. 14777561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14787561042fSKevin Coffman */ 14792d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14802d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14812d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14822d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14832d2da60cSJ. Bruce Fields } 148400fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14857561042fSKevin Coffman /* slack space should prevent this ever happening: */ 14862d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 14872d2da60cSJ. Bruce Fields status = -EIO; 14882d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 14892d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 14902d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1491fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14922d2da60cSJ. Bruce Fields else if (maj_stat) 14932d2da60cSJ. Bruce Fields return status; 14942d2da60cSJ. Bruce Fields 14952d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 14962d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 14972d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 14982d2da60cSJ. Bruce Fields iov = snd_buf->tail; 14992d2da60cSJ. Bruce Fields else 15002d2da60cSJ. Bruce Fields iov = snd_buf->head; 15012d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 15022d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 15032d2da60cSJ. Bruce Fields memset(p, 0, pad); 15042d2da60cSJ. Bruce Fields iov->iov_len += pad; 15052d2da60cSJ. Bruce Fields snd_buf->len += pad; 15062d2da60cSJ. Bruce Fields 15072d2da60cSJ. Bruce Fields return 0; 15082d2da60cSJ. Bruce Fields } 15092d2da60cSJ. Bruce Fields 15101da177e4SLinus Torvalds static int 15111da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 15129f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 15131da177e4SLinus Torvalds { 1514a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15151da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15161da177e4SLinus Torvalds gc_base); 15171da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 15181da177e4SLinus Torvalds int status = -EIO; 15191da177e4SLinus Torvalds 1520632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 15211da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 15221da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 15231da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 15241da177e4SLinus Torvalds */ 15259f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15269f06c719SChuck Lever status = 0; 15271da177e4SLinus Torvalds goto out; 15281da177e4SLinus Torvalds } 15291da177e4SLinus Torvalds switch (gss_cred->gc_service) { 15301da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 15319f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15329f06c719SChuck Lever status = 0; 15331da177e4SLinus Torvalds break; 15341da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 153589f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 15361da177e4SLinus Torvalds break; 15371da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 153889f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 15391da177e4SLinus Torvalds break; 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds out: 15421da177e4SLinus Torvalds gss_put_ctx(ctx); 1543632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15441da177e4SLinus Torvalds return status; 15451da177e4SLinus Torvalds } 15461da177e4SLinus Torvalds 15471da177e4SLinus Torvalds static inline int 15481da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1549d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15501da177e4SLinus Torvalds { 15511da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15521da177e4SLinus Torvalds struct xdr_buf integ_buf; 15531da177e4SLinus Torvalds struct xdr_netobj mic; 15541da177e4SLinus Torvalds u32 data_offset, mic_offset; 15551da177e4SLinus Torvalds u32 integ_len; 15561da177e4SLinus Torvalds u32 maj_stat; 15571da177e4SLinus Torvalds int status = -EIO; 15581da177e4SLinus Torvalds 15591da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 15601da177e4SLinus Torvalds if (integ_len & 3) 15611da177e4SLinus Torvalds return status; 15621da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15631da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 15641da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 15651da177e4SLinus Torvalds return status; 15661da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15671da177e4SLinus Torvalds return status; 15681da177e4SLinus Torvalds 15691da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15701da177e4SLinus Torvalds mic_offset - data_offset)) 15711da177e4SLinus Torvalds return status; 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15741da177e4SLinus Torvalds return status; 15751da177e4SLinus Torvalds 157600fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15771da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1578fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15791da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15801da177e4SLinus Torvalds return status; 15811da177e4SLinus Torvalds return 0; 15821da177e4SLinus Torvalds } 15831da177e4SLinus Torvalds 15842d2da60cSJ. Bruce Fields static inline int 15852d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1586d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15872d2da60cSJ. Bruce Fields { 15882d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15892d2da60cSJ. Bruce Fields u32 offset; 15902d2da60cSJ. Bruce Fields u32 opaque_len; 15912d2da60cSJ. Bruce Fields u32 maj_stat; 15922d2da60cSJ. Bruce Fields int status = -EIO; 15932d2da60cSJ. Bruce Fields 15942d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 15952d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15962d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 15972d2da60cSJ. Bruce Fields return status; 15982d2da60cSJ. Bruce Fields /* remove padding: */ 15992d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 16002d2da60cSJ. Bruce Fields 160100fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 16022d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1603fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 16042d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 16052d2da60cSJ. Bruce Fields return status; 16062d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 16072d2da60cSJ. Bruce Fields return status; 16082d2da60cSJ. Bruce Fields 16092d2da60cSJ. Bruce Fields return 0; 16102d2da60cSJ. Bruce Fields } 16112d2da60cSJ. Bruce Fields 1612bf269551SChuck Lever static int 1613bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1614bf269551SChuck Lever __be32 *p, void *obj) 1615bf269551SChuck Lever { 1616bf269551SChuck Lever struct xdr_stream xdr; 1617bf269551SChuck Lever 1618bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1619bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1620bf269551SChuck Lever } 16212d2da60cSJ. Bruce Fields 16221da177e4SLinus Torvalds static int 16231da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1624bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 16251da177e4SLinus Torvalds { 1626a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16271da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 16281da177e4SLinus Torvalds gc_base); 16291da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1630d8ed029dSAlexey Dobriyan __be32 *savedp = p; 16312d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 16322d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 16331da177e4SLinus Torvalds int status = -EIO; 16341da177e4SLinus Torvalds 16351da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 16361da177e4SLinus Torvalds goto out_decode; 16371da177e4SLinus Torvalds switch (gss_cred->gc_service) { 16381da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 16391da177e4SLinus Torvalds break; 16401da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 16411da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 16421da177e4SLinus Torvalds if (status) 16431da177e4SLinus Torvalds goto out; 16441da177e4SLinus Torvalds break; 16451da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 16462d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 16472d2da60cSJ. Bruce Fields if (status) 16482d2da60cSJ. Bruce Fields goto out; 16491da177e4SLinus Torvalds break; 16501da177e4SLinus Torvalds } 165124b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16521be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16532d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 16541da177e4SLinus Torvalds out_decode: 1655bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16561da177e4SLinus Torvalds out: 16571da177e4SLinus Torvalds gss_put_ctx(ctx); 1658632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1659632f0d05SChuck Lever task->tk_pid, __func__, status); 16601da177e4SLinus Torvalds return status; 16611da177e4SLinus Torvalds } 16621da177e4SLinus Torvalds 1663f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 16641da177e4SLinus Torvalds .owner = THIS_MODULE, 16651da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16661da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 16671da177e4SLinus Torvalds .create = gss_create, 16681da177e4SLinus Torvalds .destroy = gss_destroy, 16691da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 167080df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 167180df9d20SStanislav Kinsbursky .pipes_create = gss_pipes_dentries_create, 167280df9d20SStanislav Kinsbursky .pipes_destroy = gss_pipes_dentries_destroy, 16736a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16749568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 1675a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 16761da177e4SLinus Torvalds }; 16771da177e4SLinus Torvalds 1678f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 16791da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 16801da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1681fba3bad4STrond Myklebust .cr_init = gss_cred_init, 16825c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16831da177e4SLinus Torvalds .crmatch = gss_match, 16841da177e4SLinus Torvalds .crmarshal = gss_marshal, 16851da177e4SLinus Torvalds .crrefresh = gss_refresh, 16861da177e4SLinus Torvalds .crvalidate = gss_validate, 16871da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 16881da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 16891da177e4SLinus Torvalds }; 16901da177e4SLinus Torvalds 16910df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 16920df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 16936dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 16945c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16950df7fb74STrond Myklebust .crmatch = gss_match, 16960df7fb74STrond Myklebust .crmarshal = gss_marshal, 16970df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 16980df7fb74STrond Myklebust .crvalidate = gss_validate, 16990df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 17000df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 17010df7fb74STrond Myklebust }; 17020df7fb74STrond Myklebust 1703b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1704c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 17051da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 17061da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 170734769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 170834769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 170934769fc4S\"J. Bruce Fields\ }; 171034769fc4S\"J. Bruce Fields\ 1711b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1712c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 171334769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 171434769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 171534769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 17161da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 17171da177e4SLinus Torvalds }; 17181da177e4SLinus Torvalds 1719a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 1720a1db410dSStanislav Kinsbursky { 1721a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 1722a1db410dSStanislav Kinsbursky } 1723a1db410dSStanislav Kinsbursky 1724a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 1725a1db410dSStanislav Kinsbursky { 1726a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 1727a1db410dSStanislav Kinsbursky } 1728a1db410dSStanislav Kinsbursky 1729a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 1730a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 1731a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1732a1db410dSStanislav Kinsbursky }; 1733a1db410dSStanislav Kinsbursky 17341da177e4SLinus Torvalds /* 17351da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 17361da177e4SLinus Torvalds */ 17371da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 17381da177e4SLinus Torvalds { 17391da177e4SLinus Torvalds int err = 0; 17401da177e4SLinus Torvalds 17411da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 17421da177e4SLinus Torvalds if (err) 17431da177e4SLinus Torvalds goto out; 17441da177e4SLinus Torvalds err = gss_svc_init(); 17451da177e4SLinus Torvalds if (err) 17461da177e4SLinus Torvalds goto out_unregister; 1747a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1748a1db410dSStanislav Kinsbursky if (err) 1749a1db410dSStanislav Kinsbursky goto out_svc_exit; 175079a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17511da177e4SLinus Torvalds return 0; 1752a1db410dSStanislav Kinsbursky out_svc_exit: 1753a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 17541da177e4SLinus Torvalds out_unregister: 17551da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 17561da177e4SLinus Torvalds out: 17571da177e4SLinus Torvalds return err; 17581da177e4SLinus Torvalds } 17591da177e4SLinus Torvalds 17601da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 17611da177e4SLinus Torvalds { 1762a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17631da177e4SLinus Torvalds gss_svc_shutdown(); 17641da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 1765bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17661da177e4SLinus Torvalds } 17671da177e4SLinus Torvalds 176871afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 17691da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1770126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 1771126e216aSTrond Myklebust gss_expired_cred_retry_delay, 1772126e216aSTrond Myklebust uint, 0644); 1773126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1774126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 1775126e216aSTrond Myklebust 17761da177e4SLinus Torvalds module_init(init_rpcsec_gss) 17771da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1778