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 55f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 561da177e4SLinus Torvalds 57f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 580df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 591da177e4SLinus Torvalds 60126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 61126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 62126e216aSTrond Myklebust 631da177e4SLinus Torvalds #ifdef RPC_DEBUG 641da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 651da177e4SLinus Torvalds #endif 661da177e4SLinus Torvalds 67725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 681da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 691da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 70adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds struct gss_auth { 730285ed1fSTrond Myklebust struct kref kref; 741da177e4SLinus Torvalds struct rpc_auth rpc_auth; 751da177e4SLinus Torvalds struct gss_api_mech *mech; 761da177e4SLinus Torvalds enum rpc_gss_svc service; 771da177e4SLinus Torvalds struct rpc_clnt *client; 7834769fc4S\"J. Bruce Fields\ /* 7934769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 8034769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 8134769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 8234769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 8334769fc4S\"J. Bruce Fields\ */ 84c239d83bSStanislav Kinsbursky struct rpc_pipe *pipe[2]; 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds 8779a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 8879a3f20bS\"J. Bruce Fields\ static int pipe_version = -1; 89cf81939dS\"J. Bruce Fields\ static atomic_t pipe_users = ATOMIC_INIT(0); 9079a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 9179a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 9279a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 93cf81939dS\"J. Bruce Fields\ 945d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 95b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 96b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds static inline struct gss_cl_ctx * 991da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds atomic_inc(&ctx->count); 1021da177e4SLinus Torvalds return ctx; 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds static inline void 1061da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1071da177e4SLinus Torvalds { 1081da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1095d28dc82STrond Myklebust gss_free_ctx(ctx); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1125d28dc82STrond Myklebust /* gss_cred_set_ctx: 1135d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1145d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1159beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1165d28dc82STrond Myklebust */ 1171da177e4SLinus Torvalds static void 1181da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1215d28dc82STrond Myklebust 122cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 123cd019f75STrond Myklebust return; 1247b6962b0STrond Myklebust gss_get_ctx(ctx); 125cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 126fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 127cd019f75STrond Myklebust smp_mb__before_clear_bit(); 128fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static const void * 1321da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1351da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1361da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1371da177e4SLinus Torvalds memcpy(res, p, len); 1381da177e4SLinus Torvalds return q; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds static inline const void * 1421da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1431da177e4SLinus Torvalds { 1441da177e4SLinus Torvalds const void *q; 1451da177e4SLinus Torvalds unsigned int len; 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1481da177e4SLinus Torvalds if (IS_ERR(p)) 1491da177e4SLinus Torvalds return p; 1501da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1511da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1521da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1530f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1541da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1551da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1561da177e4SLinus Torvalds dest->len = len; 1571da177e4SLinus Torvalds return q; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static struct gss_cl_ctx * 1611da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1641da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1651da177e4SLinus Torvalds 1665d28dc82STrond Myklebust rcu_read_lock(); 1671da177e4SLinus Torvalds if (gss_cred->gc_ctx) 1681da177e4SLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1695d28dc82STrond Myklebust rcu_read_unlock(); 1701da177e4SLinus Torvalds return ctx; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds static struct gss_cl_ctx * 1741da177e4SLinus Torvalds gss_alloc_context(void) 1751da177e4SLinus Torvalds { 1761da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1771da177e4SLinus Torvalds 1780f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1791da177e4SLinus Torvalds if (ctx != NULL) { 1801da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1811da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1821da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1831da177e4SLinus Torvalds atomic_set(&ctx->count,1); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds return ctx; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1891da177e4SLinus Torvalds static const void * 1901da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds const void *q; 1931da177e4SLinus Torvalds unsigned int seclen; 1941da177e4SLinus Torvalds unsigned int timeout; 195620038f6SAndy Adamson unsigned long now = jiffies; 1961da177e4SLinus Torvalds u32 window_size; 1971da177e4SLinus Torvalds int ret; 1981da177e4SLinus Torvalds 199620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 200620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 201620038f6SAndy Adamson * the -t value passed to GSSD. 202620038f6SAndy Adamson */ 2031da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2041da177e4SLinus Torvalds if (IS_ERR(p)) 2051da177e4SLinus Torvalds goto err; 2061da177e4SLinus Torvalds if (timeout == 0) 2071da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 208620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 209620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 210620038f6SAndy Adamson * simultaneous requests 211620038f6SAndy Adamson */ 2121da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2131da177e4SLinus Torvalds if (IS_ERR(p)) 2141da177e4SLinus Torvalds goto err; 2151da177e4SLinus Torvalds ctx->gc_win = window_size; 2161da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2171da177e4SLinus Torvalds if (ctx->gc_win == 0) { 218dc5ddce9SJeff Layton /* 219dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 220dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 221dc5ddce9SJeff Layton */ 222dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 223dc5ddce9SJeff Layton if (!IS_ERR(p)) 224dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 225dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2261da177e4SLinus Torvalds goto err; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds /* copy the opaque wire context */ 2291da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2301da177e4SLinus Torvalds if (IS_ERR(p)) 2311da177e4SLinus Torvalds goto err; 2321da177e4SLinus Torvalds /* import the opaque security context */ 2331da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2341da177e4SLinus Torvalds if (IS_ERR(p)) 2351da177e4SLinus Torvalds goto err; 2361da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2371da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2381da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2391da177e4SLinus Torvalds goto err; 2401da177e4SLinus Torvalds } 2411f4c86c0STrond Myklebust ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, GFP_NOFS); 2421da177e4SLinus Torvalds if (ret < 0) { 2431da177e4SLinus Torvalds p = ERR_PTR(ret); 2441da177e4SLinus Torvalds goto err; 2451da177e4SLinus Torvalds } 246620038f6SAndy Adamson dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", 247620038f6SAndy Adamson __func__, ctx->gc_expiry, now, timeout); 2481da177e4SLinus Torvalds return q; 2491da177e4SLinus Torvalds err: 250620038f6SAndy Adamson dprintk("RPC: %s returns %ld gc_expiry %lu now %lu timeout %u\n", 251620038f6SAndy Adamson __func__, -PTR_ERR(p), ctx->gc_expiry, now, timeout); 2521da177e4SLinus Torvalds return p; 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds 25534769fc4S\"J. Bruce Fields\ #define UPCALL_BUF_LEN 128 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds struct gss_upcall_msg { 2581da177e4SLinus Torvalds atomic_t count; 2597eaf040bSEric W. Biederman kuid_t uid; 2601da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2611da177e4SLinus Torvalds struct list_head list; 2621da177e4SLinus Torvalds struct gss_auth *auth; 2639beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2641da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2651da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2661da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 26734769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2681da177e4SLinus Torvalds }; 2691da177e4SLinus Torvalds 27079a3f20bS\"J. Bruce Fields\ static int get_pipe_version(void) 27179a3f20bS\"J. Bruce Fields\ { 27279a3f20bS\"J. Bruce Fields\ int ret; 27379a3f20bS\"J. Bruce Fields\ 27479a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 27579a3f20bS\"J. Bruce Fields\ if (pipe_version >= 0) { 27679a3f20bS\"J. Bruce Fields\ atomic_inc(&pipe_users); 27734769fc4S\"J. Bruce Fields\ ret = pipe_version; 27879a3f20bS\"J. Bruce Fields\ } else 27979a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 28079a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28179a3f20bS\"J. Bruce Fields\ return ret; 28279a3f20bS\"J. Bruce Fields\ } 28379a3f20bS\"J. Bruce Fields\ 28479a3f20bS\"J. Bruce Fields\ static void put_pipe_version(void) 28579a3f20bS\"J. Bruce Fields\ { 28679a3f20bS\"J. Bruce Fields\ if (atomic_dec_and_lock(&pipe_users, &pipe_version_lock)) { 28779a3f20bS\"J. Bruce Fields\ pipe_version = -1; 28879a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28979a3f20bS\"J. Bruce Fields\ } 29079a3f20bS\"J. Bruce Fields\ } 29179a3f20bS\"J. Bruce Fields\ 2921da177e4SLinus Torvalds static void 2931da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 2941da177e4SLinus Torvalds { 2951da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2961da177e4SLinus Torvalds return; 29779a3f20bS\"J. Bruce Fields\ put_pipe_version(); 2981da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 2991da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3001da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 301f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3021da177e4SLinus Torvalds kfree(gss_msg); 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds static struct gss_upcall_msg * 3067eaf040bSEric W. Biederman __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3071da177e4SLinus Torvalds { 3081da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3099beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3100b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3111da177e4SLinus Torvalds continue; 3121da177e4SLinus Torvalds atomic_inc(&pos->count); 313632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3141da177e4SLinus Torvalds return pos; 3151da177e4SLinus Torvalds } 316632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3171da177e4SLinus Torvalds return NULL; 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds 320720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3211da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3221da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3231da177e4SLinus Torvalds */ 3241da177e4SLinus Torvalds static inline struct gss_upcall_msg * 325053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3261da177e4SLinus Torvalds { 3279beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3281da177e4SLinus Torvalds struct gss_upcall_msg *old; 3291da177e4SLinus Torvalds 3309beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3319beae467SStanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3321da177e4SLinus Torvalds if (old == NULL) { 3331da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3349beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3351da177e4SLinus Torvalds } else 3361da177e4SLinus Torvalds gss_msg = old; 3379beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3381da177e4SLinus Torvalds return gss_msg; 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds static void 3421da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3451da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3461da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3471da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds static void 3511da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3521da177e4SLinus Torvalds { 3539beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3541da177e4SLinus Torvalds 3553b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3563b68aaeaSTrond Myklebust return; 3579beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3583b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3591da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3609beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds static void 364126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 365126e216aSTrond Myklebust { 366126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 367126e216aSTrond Myklebust case 0: 368126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 369126e216aSTrond Myklebust break; 370126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 371126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 372126e216aSTrond Myklebust break; 373126e216aSTrond Myklebust case -EKEYEXPIRED: 374126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 375126e216aSTrond Myklebust } 376126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 377126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 378126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 379126e216aSTrond Myklebust } 380126e216aSTrond Myklebust 381126e216aSTrond Myklebust static void 3821da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 3831da177e4SLinus Torvalds { 384a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 3851da177e4SLinus Torvalds struct gss_cred, gc_base); 3861da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3879beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3881da177e4SLinus Torvalds 3899beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 390126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 3919beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 392126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 3931da177e4SLinus Torvalds gss_release_msg(gss_msg); 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds 39634769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 39734769fc4S\"J. Bruce Fields\ { 39834769fc4S\"J. Bruce Fields\ gss_msg->msg.data = &gss_msg->uid; 39934769fc4S\"J. Bruce Fields\ gss_msg->msg.len = sizeof(gss_msg->uid); 40034769fc4S\"J. Bruce Fields\ } 40134769fc4S\"J. Bruce Fields\ 4028b1c7bf5SOlga Kornievskaia static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 40368c97153STrond Myklebust struct rpc_clnt *clnt, 40468c97153STrond Myklebust const char *service_name) 40534769fc4S\"J. Bruce Fields\ { 406683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4078b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4088b1c7bf5SOlga Kornievskaia int len = 0; 4098b1c7bf5SOlga Kornievskaia 4108b1c7bf5SOlga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 411683ac665STrond Myklebust mech->gm_name, 41234769fc4S\"J. Bruce Fields\ gss_msg->uid); 4138b1c7bf5SOlga Kornievskaia p += gss_msg->msg.len; 4148b1c7bf5SOlga Kornievskaia if (clnt->cl_principal) { 4158b1c7bf5SOlga Kornievskaia len = sprintf(p, "target=%s ", clnt->cl_principal); 4168b1c7bf5SOlga Kornievskaia p += len; 4178b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4188b1c7bf5SOlga Kornievskaia } 41968c97153STrond Myklebust if (service_name != NULL) { 42068c97153STrond Myklebust len = sprintf(p, "service=%s ", service_name); 4212efef708SOlga Kornievskaia p += len; 4222efef708SOlga Kornievskaia gss_msg->msg.len += len; 4232efef708SOlga Kornievskaia } 424683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 425f8628220SKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 426683ac665STrond Myklebust p += len; 427683ac665STrond Myklebust gss_msg->msg.len += len; 428683ac665STrond Myklebust } 4298b1c7bf5SOlga Kornievskaia len = sprintf(p, "\n"); 4308b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4318b1c7bf5SOlga Kornievskaia 43234769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 43334769fc4S\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 43434769fc4S\"J. Bruce Fields\ } 43534769fc4S\"J. Bruce Fields\ 4368b1c7bf5SOlga Kornievskaia static void gss_encode_msg(struct gss_upcall_msg *gss_msg, 43768c97153STrond Myklebust struct rpc_clnt *clnt, 43868c97153STrond Myklebust const char *service_name) 43934769fc4S\"J. Bruce Fields\ { 44034769fc4S\"J. Bruce Fields\ if (pipe_version == 0) 44134769fc4S\"J. Bruce Fields\ gss_encode_v0_msg(gss_msg); 44234769fc4S\"J. Bruce Fields\ else /* pipe_version == 1 */ 44368c97153STrond Myklebust gss_encode_v1_msg(gss_msg, clnt, service_name); 44434769fc4S\"J. Bruce Fields\ } 44534769fc4S\"J. Bruce Fields\ 44668c97153STrond Myklebust static struct gss_upcall_msg * 44768c97153STrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt, 4487eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4491da177e4SLinus Torvalds { 4501da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 45179a3f20bS\"J. Bruce Fields\ int vers; 4521da177e4SLinus Torvalds 4530f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 454db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 455db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 45679a3f20bS\"J. Bruce Fields\ vers = get_pipe_version(); 45779a3f20bS\"J. Bruce Fields\ if (vers < 0) { 45879a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 45979a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 46079a3f20bS\"J. Bruce Fields\ } 461c239d83bSStanislav Kinsbursky gss_msg->pipe = gss_auth->pipe[vers]; 4621da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 4631da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 4641da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 4651da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 4661da177e4SLinus Torvalds gss_msg->uid = uid; 4671da177e4SLinus Torvalds gss_msg->auth = gss_auth; 46868c97153STrond Myklebust gss_encode_msg(gss_msg, clnt, service_name); 4691da177e4SLinus Torvalds return gss_msg; 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds static struct gss_upcall_msg * 4731da177e4SLinus Torvalds gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 4741da177e4SLinus Torvalds { 4757c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4767c67db3aSTrond Myklebust struct gss_cred, gc_base); 4771da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4787eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 4791da177e4SLinus Torvalds 48068c97153STrond Myklebust gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal); 481db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 482db75b3d6S\"J. Bruce Fields\ return gss_new; 483053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 4841da177e4SLinus Torvalds if (gss_msg == gss_new) { 4859beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4861da177e4SLinus Torvalds if (res) { 4871da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4881da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds } else 4911da177e4SLinus Torvalds gss_release_msg(gss_new); 4921da177e4SLinus Torvalds return gss_msg; 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds 495b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 496b03568c3S\"J. Bruce Fields\ { 497b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 498b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 499b03568c3S\"J. Bruce Fields\ 500b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 501b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 502b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 503b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 504b03568c3S\"J. Bruce Fields\ } 505b03568c3S\"J. Bruce Fields\ } 506b03568c3S\"J. Bruce Fields\ 5071da177e4SLinus Torvalds static inline int 5081da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5091da177e4SLinus Torvalds { 510a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5114a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5121da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5131da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5141da177e4SLinus Torvalds struct gss_cred, gc_base); 5151da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5169beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5171da177e4SLinus Torvalds int err = 0; 5181da177e4SLinus Torvalds 519632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 520632f0d05SChuck Lever task->tk_pid, __func__, cred->cr_uid); 5211da177e4SLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 522480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 52379a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 52479a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 52579a3f20bS\"J. Bruce Fields\ warn_gssd(); 52679a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 52779a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 528d1a8016aSBryan Schumaker return -EAGAIN; 52979a3f20bS\"J. Bruce Fields\ } 5301da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5311da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5321da177e4SLinus Torvalds goto out; 5331da177e4SLinus Torvalds } 5349beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5359beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5361da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5375d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 538126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5391da177e4SLinus Torvalds task->tk_timeout = 0; 5401da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5411da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5421da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5435d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 544126e216aSTrond Myklebust } else { 545126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5461da177e4SLinus Torvalds err = gss_msg->msg.errno; 547126e216aSTrond Myklebust } 5489beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5491da177e4SLinus Torvalds gss_release_msg(gss_msg); 5501da177e4SLinus Torvalds out: 551632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 552632f0d05SChuck Lever task->tk_pid, __func__, cred->cr_uid, err); 5531da177e4SLinus Torvalds return err; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds static inline int 5571da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5581da177e4SLinus Torvalds { 5599beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5601da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5611da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5621da177e4SLinus Torvalds DEFINE_WAIT(wait); 5631da177e4SLinus Torvalds int err = 0; 5641da177e4SLinus Torvalds 565632f0d05SChuck Lever dprintk("RPC: %s for uid %u\n", __func__, cred->cr_uid); 56679a3f20bS\"J. Bruce Fields\ retry: 5671da177e4SLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 56879a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 56979a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 57079a3f20bS\"J. Bruce Fields\ pipe_version >= 0, 15*HZ); 571d1a8016aSBryan Schumaker if (pipe_version < 0) { 572d1a8016aSBryan Schumaker warn_gssd(); 573d1a8016aSBryan Schumaker err = -EACCES; 574d1a8016aSBryan Schumaker } 57579a3f20bS\"J. Bruce Fields\ if (err) 57679a3f20bS\"J. Bruce Fields\ goto out; 57779a3f20bS\"J. Bruce Fields\ goto retry; 57879a3f20bS\"J. Bruce Fields\ } 5791da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5801da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5811da177e4SLinus Torvalds goto out; 5821da177e4SLinus Torvalds } 5839beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5841da177e4SLinus Torvalds for (;;) { 5855afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 5869beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5871da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds } 5909beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5915afa9133STrond Myklebust if (fatal_signal_pending(current)) { 5921da177e4SLinus Torvalds err = -ERESTARTSYS; 5931da177e4SLinus Torvalds goto out_intr; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds schedule(); 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds if (gss_msg->ctx) 5987b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 5991da177e4SLinus Torvalds else 6001da177e4SLinus Torvalds err = gss_msg->msg.errno; 6019beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6021da177e4SLinus Torvalds out_intr: 6031da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6041da177e4SLinus Torvalds gss_release_msg(gss_msg); 6051da177e4SLinus Torvalds out: 606632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 607632f0d05SChuck Lever __func__, cred->cr_uid, err); 6081da177e4SLinus Torvalds return err; 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds static ssize_t 6141da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6151da177e4SLinus Torvalds { 6161da177e4SLinus Torvalds const void *p, *end; 6171da177e4SLinus Torvalds void *buf; 6181da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6199beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(filp->f_dentry->d_inode)->pipe; 6201da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 6211da177e4SLinus Torvalds uid_t uid; 6223b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6251da177e4SLinus Torvalds goto out; 6261da177e4SLinus Torvalds err = -ENOMEM; 6270f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6281da177e4SLinus Torvalds if (!buf) 6291da177e4SLinus Torvalds goto out; 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds err = -EFAULT; 6321da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6331da177e4SLinus Torvalds goto err; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 6361da177e4SLinus Torvalds p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 6371da177e4SLinus Torvalds if (IS_ERR(p)) { 6381da177e4SLinus Torvalds err = PTR_ERR(p); 6391da177e4SLinus Torvalds goto err; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds err = -ENOMEM; 6431da177e4SLinus Torvalds ctx = gss_alloc_context(); 6441da177e4SLinus Torvalds if (ctx == NULL) 6451da177e4SLinus Torvalds goto err; 6463b68aaeaSTrond Myklebust 6473b68aaeaSTrond Myklebust err = -ENOENT; 6483b68aaeaSTrond Myklebust /* Find a matching upcall */ 6499beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6509beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6513b68aaeaSTrond Myklebust if (gss_msg == NULL) { 6529beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6533b68aaeaSTrond Myklebust goto err_put_ctx; 6543b68aaeaSTrond Myklebust } 6553b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 6569beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6573b68aaeaSTrond Myklebust 6586e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6591da177e4SLinus Torvalds if (IS_ERR(p)) { 6601da177e4SLinus Torvalds err = PTR_ERR(p); 661486bad2eSJeff Layton switch (err) { 662486bad2eSJeff Layton case -EACCES: 663dc5ddce9SJeff Layton case -EKEYEXPIRED: 664486bad2eSJeff Layton gss_msg->msg.errno = err; 665486bad2eSJeff Layton err = mlen; 666486bad2eSJeff Layton break; 667486bad2eSJeff Layton case -EFAULT: 668486bad2eSJeff Layton case -ENOMEM: 669486bad2eSJeff Layton case -EINVAL: 670486bad2eSJeff Layton case -ENOSYS: 671486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 672486bad2eSJeff Layton break; 673486bad2eSJeff Layton default: 674486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 6756c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 676486bad2eSJeff Layton BUG(); 677486bad2eSJeff Layton } 6783b68aaeaSTrond Myklebust goto err_release_msg; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 6813b68aaeaSTrond Myklebust err = mlen; 6823b68aaeaSTrond Myklebust 6833b68aaeaSTrond Myklebust err_release_msg: 6849beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6851da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 6869beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6871da177e4SLinus Torvalds gss_release_msg(gss_msg); 6881da177e4SLinus Torvalds err_put_ctx: 6891da177e4SLinus Torvalds gss_put_ctx(ctx); 6901da177e4SLinus Torvalds err: 6911da177e4SLinus Torvalds kfree(buf); 6921da177e4SLinus Torvalds out: 693632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 6941da177e4SLinus Torvalds return err; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 69734769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 698cf81939dS\"J. Bruce Fields\ { 69934769fc4S\"J. Bruce Fields\ int ret = 0; 70034769fc4S\"J. Bruce Fields\ 70179a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 70279a3f20bS\"J. Bruce Fields\ if (pipe_version < 0) { 70334769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 70434769fc4S\"J. Bruce Fields\ pipe_version = new_version; 70579a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 70679a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 70734769fc4S\"J. Bruce Fields\ } else if (pipe_version != new_version) { 70834769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 70934769fc4S\"J. Bruce Fields\ ret = -EBUSY; 71034769fc4S\"J. Bruce Fields\ goto out; 71179a3f20bS\"J. Bruce Fields\ } 712cf81939dS\"J. Bruce Fields\ atomic_inc(&pipe_users); 71334769fc4S\"J. Bruce Fields\ out: 71479a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 71534769fc4S\"J. Bruce Fields\ return ret; 71634769fc4S\"J. Bruce Fields\ 71734769fc4S\"J. Bruce Fields\ } 71834769fc4S\"J. Bruce Fields\ 71934769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 72034769fc4S\"J. Bruce Fields\ { 72134769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 72234769fc4S\"J. Bruce Fields\ } 72334769fc4S\"J. Bruce Fields\ 72434769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 72534769fc4S\"J. Bruce Fields\ { 72634769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 727cf81939dS\"J. Bruce Fields\ } 728cf81939dS\"J. Bruce Fields\ 7291da177e4SLinus Torvalds static void 7301da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 7311da177e4SLinus Torvalds { 7329beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7331da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 7341da177e4SLinus Torvalds 7355a67657aSTrond Myklebust restart: 7369beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7379beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7386e84c7b6STrond Myklebust 7395a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7405a67657aSTrond Myklebust continue; 7411da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 7421da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7431da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7449beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7451da177e4SLinus Torvalds gss_release_msg(gss_msg); 7465a67657aSTrond Myklebust goto restart; 7471da177e4SLinus Torvalds } 7489beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 749cf81939dS\"J. Bruce Fields\ 75079a3f20bS\"J. Bruce Fields\ put_pipe_version(); 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds static void 7541da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7551da177e4SLinus Torvalds { 7561da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds if (msg->errno < 0) { 759632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 760632f0d05SChuck Lever __func__, gss_msg); 7611da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7621da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 763b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 764b03568c3S\"J. Bruce Fields\ warn_gssd(); 7651da177e4SLinus Torvalds gss_release_msg(gss_msg); 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds 769ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy(struct rpc_auth *auth) 770ccdc28f8SStanislav Kinsbursky { 771ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 772ccdc28f8SStanislav Kinsbursky 773ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 77480df9d20SStanislav Kinsbursky if (gss_auth->pipe[0]->dentry) 775ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[0]->dentry); 77680df9d20SStanislav Kinsbursky if (gss_auth->pipe[1]->dentry) 777ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 778ccdc28f8SStanislav Kinsbursky } 779ccdc28f8SStanislav Kinsbursky 780ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create(struct rpc_auth *auth) 781ccdc28f8SStanislav Kinsbursky { 782ccdc28f8SStanislav Kinsbursky int err; 783ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 784ccdc28f8SStanislav Kinsbursky struct rpc_clnt *clnt; 785ccdc28f8SStanislav Kinsbursky 786ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 787ccdc28f8SStanislav Kinsbursky clnt = gss_auth->client; 788ccdc28f8SStanislav Kinsbursky 78930507f58SStanislav Kinsbursky gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 790ccdc28f8SStanislav Kinsbursky "gssd", 791ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[1]); 792ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1]->dentry)) 793ccdc28f8SStanislav Kinsbursky return PTR_ERR(gss_auth->pipe[1]->dentry); 79430507f58SStanislav Kinsbursky gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 795ccdc28f8SStanislav Kinsbursky gss_auth->mech->gm_name, 796ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[0]); 797ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0]->dentry)) { 798ccdc28f8SStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]->dentry); 799ccdc28f8SStanislav Kinsbursky goto err_unlink_pipe_1; 800ccdc28f8SStanislav Kinsbursky } 801ccdc28f8SStanislav Kinsbursky return 0; 802ccdc28f8SStanislav Kinsbursky 803ccdc28f8SStanislav Kinsbursky err_unlink_pipe_1: 804ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 805ccdc28f8SStanislav Kinsbursky return err; 806ccdc28f8SStanislav Kinsbursky } 807ccdc28f8SStanislav Kinsbursky 808ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, 809ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 810ccdc28f8SStanislav Kinsbursky { 8112446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 812ccdc28f8SStanislav Kinsbursky struct super_block *sb; 813ccdc28f8SStanislav Kinsbursky 814ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 815ccdc28f8SStanislav Kinsbursky if (sb) { 81630507f58SStanislav Kinsbursky if (clnt->cl_dentry) 817ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy(auth); 818ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 819ccdc28f8SStanislav Kinsbursky } 820ccdc28f8SStanislav Kinsbursky } 821ccdc28f8SStanislav Kinsbursky 822ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, 823ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 824ccdc28f8SStanislav Kinsbursky { 8252446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 826ccdc28f8SStanislav Kinsbursky struct super_block *sb; 827ccdc28f8SStanislav Kinsbursky int err = 0; 828ccdc28f8SStanislav Kinsbursky 829ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 830ccdc28f8SStanislav Kinsbursky if (sb) { 83130507f58SStanislav Kinsbursky if (clnt->cl_dentry) 832ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create(auth); 833ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 834ccdc28f8SStanislav Kinsbursky } 835ccdc28f8SStanislav Kinsbursky return err; 836ccdc28f8SStanislav Kinsbursky } 837ccdc28f8SStanislav Kinsbursky 8381da177e4SLinus Torvalds /* 8391da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 8401da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8411da177e4SLinus Torvalds */ 8421da177e4SLinus Torvalds static struct rpc_auth * 8431da177e4SLinus Torvalds gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 8441da177e4SLinus Torvalds { 8451da177e4SLinus Torvalds struct gss_auth *gss_auth; 8461da177e4SLinus Torvalds struct rpc_auth * auth; 8476a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 8526a19275aSJ. Bruce Fields return ERR_PTR(err); 8531da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8541da177e4SLinus Torvalds goto out_dec; 8551da177e4SLinus Torvalds gss_auth->client = clnt; 8566a19275aSJ. Bruce Fields err = -EINVAL; 8571da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 8581da177e4SLinus Torvalds if (!gss_auth->mech) { 8593392c349SJames Morris printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n", 8600dc47877SHarvey Harrison __func__, flavor); 8611da177e4SLinus Torvalds goto err_free; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 864438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 865438b6fdeSJ. Bruce Fields goto err_put_mech; 8661da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 8671da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 8681da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 8691da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 8701da177e4SLinus Torvalds auth->au_flavor = flavor; 8711da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 8720285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 8731da177e4SLinus Torvalds 87434769fc4S\"J. Bruce Fields\ /* 87534769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 87634769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 87734769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 87834769fc4S\"J. Bruce Fields\ * the new pipe first. 87934769fc4S\"J. Bruce Fields\ */ 880c239d83bSStanislav Kinsbursky gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1, 88134769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 882c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1])) { 883c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[1]); 8841da177e4SLinus Torvalds goto err_put_mech; 8856a19275aSJ. Bruce Fields } 8861da177e4SLinus Torvalds 887c239d83bSStanislav Kinsbursky gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0, 88834769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 889c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0])) { 890c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]); 891c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 892c239d83bSStanislav Kinsbursky } 893ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create_net(clnt, auth); 894ccdc28f8SStanislav Kinsbursky if (err) 895c239d83bSStanislav Kinsbursky goto err_destroy_pipe_0; 896f5c2187cSTrond Myklebust err = rpcauth_init_credcache(auth); 89707a2bf1dSTrond Myklebust if (err) 898ccdc28f8SStanislav Kinsbursky goto err_unlink_pipes; 89907a2bf1dSTrond Myklebust 9001da177e4SLinus Torvalds return auth; 901ccdc28f8SStanislav Kinsbursky err_unlink_pipes: 902ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(clnt, auth); 903c239d83bSStanislav Kinsbursky err_destroy_pipe_0: 904c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 905c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 906c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9071da177e4SLinus Torvalds err_put_mech: 9081da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 9091da177e4SLinus Torvalds err_free: 9101da177e4SLinus Torvalds kfree(gss_auth); 9111da177e4SLinus Torvalds out_dec: 9121da177e4SLinus Torvalds module_put(THIS_MODULE); 9136a19275aSJ. Bruce Fields return ERR_PTR(err); 9141da177e4SLinus Torvalds } 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds static void 9170285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 9180285ed1fSTrond Myklebust { 919ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); 920c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 921c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9220285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 9230285ed1fSTrond Myklebust 9240285ed1fSTrond Myklebust kfree(gss_auth); 9250285ed1fSTrond Myklebust module_put(THIS_MODULE); 9260285ed1fSTrond Myklebust } 9270285ed1fSTrond Myklebust 9280285ed1fSTrond Myklebust static void 9290285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 9300285ed1fSTrond Myklebust { 9310285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9320285ed1fSTrond Myklebust 9330285ed1fSTrond Myklebust gss_free(gss_auth); 9340285ed1fSTrond Myklebust } 9350285ed1fSTrond Myklebust 9360285ed1fSTrond Myklebust static void 9371da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 9381da177e4SLinus Torvalds { 9391da177e4SLinus Torvalds struct gss_auth *gss_auth; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9421da177e4SLinus Torvalds auth, auth->au_flavor); 9431da177e4SLinus Torvalds 9443ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 9453ab9bb72STrond Myklebust 9461da177e4SLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 9470285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 9500df7fb74STrond Myklebust /* 9510df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 9520df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 9530df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 9540df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 9550df7fb74STrond Myklebust */ 9560df7fb74STrond Myklebust static int 9570df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 9580df7fb74STrond Myklebust { 9590df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 9600df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 9610df7fb74STrond Myklebust struct rpc_task *task; 9620df7fb74STrond Myklebust 9630df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 9646dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 9650df7fb74STrond Myklebust return 0; 9660df7fb74STrond Myklebust 9670df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 9680df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 9690df7fb74STrond Myklebust 9700df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 9710df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 9720df7fb74STrond Myklebust get_rpccred(cred); 9730df7fb74STrond Myklebust 974080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 9750df7fb74STrond Myklebust if (!IS_ERR(task)) 9760df7fb74STrond Myklebust rpc_put_task(task); 9770df7fb74STrond Myklebust 9780df7fb74STrond Myklebust put_rpccred(cred); 9790df7fb74STrond Myklebust return 1; 9800df7fb74STrond Myklebust } 9810df7fb74STrond Myklebust 9820df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 9831da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 9841da177e4SLinus Torvalds * allocated before freeing them. */ 9851da177e4SLinus Torvalds static void 9865d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 9871da177e4SLinus Torvalds { 988632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 9891da177e4SLinus Torvalds 9900d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 9911da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 9921da177e4SLinus Torvalds kfree(ctx); 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds static void 9965d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 9975d28dc82STrond Myklebust { 9985d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 9995d28dc82STrond Myklebust gss_do_free_ctx(ctx); 10005d28dc82STrond Myklebust } 10015d28dc82STrond Myklebust 10025d28dc82STrond Myklebust static void 10035d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 10045d28dc82STrond Myklebust { 10055d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10065d28dc82STrond Myklebust } 10075d28dc82STrond Myklebust 10085d28dc82STrond Myklebust static void 100931be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 10101da177e4SLinus Torvalds { 1011632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 101231be5bf1STrond Myklebust kfree(gss_cred); 101331be5bf1STrond Myklebust } 10141da177e4SLinus Torvalds 101531be5bf1STrond Myklebust static void 101631be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 101731be5bf1STrond Myklebust { 101831be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 101931be5bf1STrond Myklebust gss_free_cred(gss_cred); 102031be5bf1STrond Myklebust } 10211da177e4SLinus Torvalds 102231be5bf1STrond Myklebust static void 10236dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 102431be5bf1STrond Myklebust { 10255d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10260285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10275d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10285d28dc82STrond Myklebust 1029a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 103031be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10315d28dc82STrond Myklebust if (ctx) 10325d28dc82STrond Myklebust gss_put_ctx(ctx); 10330285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10366dcd3926SJeff Layton static void 10376dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 10386dcd3926SJeff Layton { 10396dcd3926SJeff Layton 10406dcd3926SJeff Layton if (gss_destroying_context(cred)) 10416dcd3926SJeff Layton return; 10426dcd3926SJeff Layton gss_destroy_nullcred(cred); 10436dcd3926SJeff Layton } 10446dcd3926SJeff Layton 10451da177e4SLinus Torvalds /* 10461da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 10471da177e4SLinus Torvalds */ 10481da177e4SLinus Torvalds static struct rpc_cred * 10498a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10501da177e4SLinus Torvalds { 10518a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds static struct rpc_cred * 10558a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10561da177e4SLinus Torvalds { 10571da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 10581da177e4SLinus Torvalds struct gss_cred *cred = NULL; 10591da177e4SLinus Torvalds int err = -ENOMEM; 10601da177e4SLinus Torvalds 1061632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1062632f0d05SChuck Lever __func__, acred->uid, auth->au_flavor); 10631da177e4SLinus Torvalds 10640f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 10651da177e4SLinus Torvalds goto out_err; 10661da177e4SLinus Torvalds 10675fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 10681da177e4SLinus Torvalds /* 10691da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 10701da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 10711da177e4SLinus Torvalds */ 1072fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 10731da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 107468c97153STrond Myklebust cred->gc_principal = NULL; 107568c97153STrond Myklebust if (acred->machine_cred) 107668c97153STrond Myklebust cred->gc_principal = acred->principal; 10770285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 10781da177e4SLinus Torvalds return &cred->gc_base; 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds out_err: 1081632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 10821da177e4SLinus Torvalds return ERR_PTR(err); 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds static int 1086fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1087fba3bad4STrond Myklebust { 1088fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1089fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1090fba3bad4STrond Myklebust int err; 1091fba3bad4STrond Myklebust 1092fba3bad4STrond Myklebust do { 1093fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1094fba3bad4STrond Myklebust } while (err == -EAGAIN); 1095fba3bad4STrond Myklebust return err; 1096fba3bad4STrond Myklebust } 1097fba3bad4STrond Myklebust 1098fba3bad4STrond Myklebust static int 10998a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11001da177e4SLinus Torvalds { 11011da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11021da177e4SLinus Torvalds 1103cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11048a317760STrond Myklebust goto out; 11051da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1106cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1107cd019f75STrond Myklebust return 0; 1108cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11091da177e4SLinus Torvalds return 0; 11108a317760STrond Myklebust out: 111168c97153STrond Myklebust if (acred->principal != NULL) { 111268c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 111368c97153STrond Myklebust return 0; 111468c97153STrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 111568c97153STrond Myklebust } 111668c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 11177c67db3aSTrond Myklebust return 0; 11180b4d51b0SEric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds /* 11221da177e4SLinus Torvalds * Marshal credentials. 11231da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 11241da177e4SLinus Torvalds */ 1125d8ed029dSAlexey Dobriyan static __be32 * 1126d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 11271da177e4SLinus Torvalds { 1128a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1129a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 11301da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11311da177e4SLinus Torvalds gc_base); 11321da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1133d8ed029dSAlexey Dobriyan __be32 *cred_len; 11341da177e4SLinus Torvalds u32 maj_stat = 0; 11351da177e4SLinus Torvalds struct xdr_netobj mic; 11361da177e4SLinus Torvalds struct kvec iov; 11371da177e4SLinus Torvalds struct xdr_buf verf_buf; 11381da177e4SLinus Torvalds 1139632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11401da177e4SLinus Torvalds 11411da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11421da177e4SLinus Torvalds cred_len = p++; 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 11451da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 11461da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 11491da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 11501da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 11511da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 11521da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 11531da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 11541da177e4SLinus Torvalds 11551da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 11561da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1157808012fbSChuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 1158808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 11591da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 11601da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds /* set verifier flavor*/ 11631da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 116600fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 11671da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1168fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 11691da177e4SLinus Torvalds } else if (maj_stat != 0) { 11701da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 11711da177e4SLinus Torvalds goto out_put_ctx; 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 11741da177e4SLinus Torvalds gss_put_ctx(ctx); 11751da177e4SLinus Torvalds return p; 11761da177e4SLinus Torvalds out_put_ctx: 11771da177e4SLinus Torvalds gss_put_ctx(ctx); 11781da177e4SLinus Torvalds return NULL; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 1181cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1182cd019f75STrond Myklebust { 1183a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1184cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1185cd019f75STrond Myklebust struct gss_cred, 1186cd019f75STrond Myklebust gc_base); 1187cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1188cd019f75STrond Myklebust struct auth_cred acred = { 1189cd019f75STrond Myklebust .uid = oldcred->cr_uid, 119068c97153STrond Myklebust .principal = gss_cred->gc_principal, 119168c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1192cd019f75STrond Myklebust }; 1193cd019f75STrond Myklebust struct rpc_cred *new; 1194cd019f75STrond Myklebust 1195cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1196cd019f75STrond Myklebust if (IS_ERR(new)) 1197cd019f75STrond Myklebust return PTR_ERR(new); 1198a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1199cd019f75STrond Myklebust put_rpccred(oldcred); 1200cd019f75STrond Myklebust return 0; 1201cd019f75STrond Myklebust } 1202cd019f75STrond Myklebust 1203126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1204126e216aSTrond Myklebust { 1205126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1206126e216aSTrond Myklebust unsigned long now = jiffies; 1207126e216aSTrond Myklebust unsigned long begin, expire; 1208126e216aSTrond Myklebust struct gss_cred *gss_cred; 1209126e216aSTrond Myklebust 1210126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1211126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1212126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1213126e216aSTrond Myklebust 1214126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1215126e216aSTrond Myklebust return 1; 1216126e216aSTrond Myklebust } 1217126e216aSTrond Myklebust return 0; 1218126e216aSTrond Myklebust } 1219126e216aSTrond Myklebust 12201da177e4SLinus Torvalds /* 12211da177e4SLinus Torvalds * Refresh credentials. XXX - finish 12221da177e4SLinus Torvalds */ 12231da177e4SLinus Torvalds static int 12241da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 12251da177e4SLinus Torvalds { 1226a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1227cd019f75STrond Myklebust int ret = 0; 12281da177e4SLinus Torvalds 1229126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1230126e216aSTrond Myklebust return -EKEYEXPIRED; 1231126e216aSTrond Myklebust 1232cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1233cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1234cd019f75STrond Myklebust ret = gss_renew_cred(task); 1235cd019f75STrond Myklebust if (ret < 0) 1236cd019f75STrond Myklebust goto out; 1237a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1238cd019f75STrond Myklebust } 1239cd019f75STrond Myklebust 1240cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1241cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1242cd019f75STrond Myklebust out: 1243cd019f75STrond Myklebust return ret; 12441da177e4SLinus Torvalds } 12451da177e4SLinus Torvalds 12460df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 12470df7fb74STrond Myklebust static int 12480df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 12490df7fb74STrond Myklebust { 12500df7fb74STrond Myklebust return -EACCES; 12510df7fb74STrond Myklebust } 12520df7fb74STrond Myklebust 1253d8ed029dSAlexey Dobriyan static __be32 * 1254d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 12551da177e4SLinus Torvalds { 1256a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 12571da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1258d8ed029dSAlexey Dobriyan __be32 seq; 12591da177e4SLinus Torvalds struct kvec iov; 12601da177e4SLinus Torvalds struct xdr_buf verf_buf; 12611da177e4SLinus Torvalds struct xdr_netobj mic; 12621da177e4SLinus Torvalds u32 flav,len; 12631da177e4SLinus Torvalds u32 maj_stat; 12641da177e4SLinus Torvalds 1265632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds flav = ntohl(*p++); 12681da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 12691da177e4SLinus Torvalds goto out_bad; 12701da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 12711da177e4SLinus Torvalds goto out_bad; 12721da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 12731da177e4SLinus Torvalds iov.iov_base = &seq; 12741da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 12751da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 12761da177e4SLinus Torvalds mic.data = (u8 *)p; 12771da177e4SLinus Torvalds mic.len = len; 12781da177e4SLinus Torvalds 127900fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 12801da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1281fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12820df7fb74STrond Myklebust if (maj_stat) { 1283632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1284632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 12851da177e4SLinus Torvalds goto out_bad; 12860df7fb74STrond Myklebust } 128724b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 128824b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 12891be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 12901da177e4SLinus Torvalds gss_put_ctx(ctx); 1291632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1292632f0d05SChuck Lever task->tk_pid, __func__); 12931da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 12941da177e4SLinus Torvalds out_bad: 12951da177e4SLinus Torvalds gss_put_ctx(ctx); 1296632f0d05SChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 12971da177e4SLinus Torvalds return NULL; 12981da177e4SLinus Torvalds } 12991da177e4SLinus Torvalds 13009f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13019f06c719SChuck Lever __be32 *p, void *obj) 13029f06c719SChuck Lever { 13039f06c719SChuck Lever struct xdr_stream xdr; 13049f06c719SChuck Lever 13059f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13069f06c719SChuck Lever encode(rqstp, &xdr, obj); 13079f06c719SChuck Lever } 13089f06c719SChuck Lever 13091da177e4SLinus Torvalds static inline int 13101da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13119f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13129f06c719SChuck Lever __be32 *p, void *obj) 13131da177e4SLinus Torvalds { 13141da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13151da177e4SLinus Torvalds struct xdr_buf integ_buf; 1316d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 13171da177e4SLinus Torvalds struct xdr_netobj mic; 1318d8ed029dSAlexey Dobriyan u32 offset; 1319d8ed029dSAlexey Dobriyan __be32 *q; 13201da177e4SLinus Torvalds struct kvec *iov; 13211da177e4SLinus Torvalds u32 maj_stat = 0; 13221da177e4SLinus Torvalds int status = -EIO; 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds integ_len = p++; 13251da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13261da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13271da177e4SLinus Torvalds 13289f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13311da177e4SLinus Torvalds offset, snd_buf->len - offset)) 13321da177e4SLinus Torvalds return status; 13331da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 13361da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13371da177e4SLinus Torvalds iov = snd_buf->tail; 13381da177e4SLinus Torvalds else 13391da177e4SLinus Torvalds iov = snd_buf->head; 13401da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 13411da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 13421da177e4SLinus Torvalds 134300fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13441da177e4SLinus Torvalds status = -EIO; /* XXX? */ 13451da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1346fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13471da177e4SLinus Torvalds else if (maj_stat) 13481da177e4SLinus Torvalds return status; 13491da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 13521da177e4SLinus Torvalds iov->iov_len += offset; 13531da177e4SLinus Torvalds snd_buf->len += offset; 13541da177e4SLinus Torvalds return 0; 13551da177e4SLinus Torvalds } 13561da177e4SLinus Torvalds 13572d2da60cSJ. Bruce Fields static void 13582d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 13592d2da60cSJ. Bruce Fields { 13602d2da60cSJ. Bruce Fields int i; 13612d2da60cSJ. Bruce Fields 13622d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 13632d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 13642d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 13652d2da60cSJ. Bruce Fields } 13662d2da60cSJ. Bruce Fields 13672d2da60cSJ. Bruce Fields static int 13682d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 13692d2da60cSJ. Bruce Fields { 13702d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13712d2da60cSJ. Bruce Fields int first, last, i; 13722d2da60cSJ. Bruce Fields 13732d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 13742d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 13752d2da60cSJ. Bruce Fields return 0; 13762d2da60cSJ. Bruce Fields } 13772d2da60cSJ. Bruce Fields 13782d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 13792d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 13802d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 13812d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 13822d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 13832d2da60cSJ. Bruce Fields GFP_NOFS); 13842d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 13852d2da60cSJ. Bruce Fields goto out; 13862d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 13872d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 13882d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 13892d2da60cSJ. Bruce Fields goto out_free; 13902d2da60cSJ. Bruce Fields } 13912d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 13922d2da60cSJ. Bruce Fields return 0; 13932d2da60cSJ. Bruce Fields out_free: 1394cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1395cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 13962d2da60cSJ. Bruce Fields out: 13972d2da60cSJ. Bruce Fields return -EAGAIN; 13982d2da60cSJ. Bruce Fields } 13992d2da60cSJ. Bruce Fields 14002d2da60cSJ. Bruce Fields static inline int 14012d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14029f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14039f06c719SChuck Lever __be32 *p, void *obj) 14042d2da60cSJ. Bruce Fields { 14052d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14062d2da60cSJ. Bruce Fields u32 offset; 14072d2da60cSJ. Bruce Fields u32 maj_stat; 14082d2da60cSJ. Bruce Fields int status; 1409d8ed029dSAlexey Dobriyan __be32 *opaque_len; 14102d2da60cSJ. Bruce Fields struct page **inpages; 14112d2da60cSJ. Bruce Fields int first; 14122d2da60cSJ. Bruce Fields int pad; 14132d2da60cSJ. Bruce Fields struct kvec *iov; 14142d2da60cSJ. Bruce Fields char *tmp; 14152d2da60cSJ. Bruce Fields 14162d2da60cSJ. Bruce Fields opaque_len = p++; 14172d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14182d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14192d2da60cSJ. Bruce Fields 14209f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14212d2da60cSJ. Bruce Fields 14222d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 14232d2da60cSJ. Bruce Fields if (status) 14242d2da60cSJ. Bruce Fields return status; 14252d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14262d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 14272d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14282d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14297561042fSKevin Coffman /* 14307561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 14317561042fSKevin Coffman * head when wrapping: 14327561042fSKevin Coffman * 14337561042fSKevin Coffman * call_allocate() allocates twice the slack space required 14347561042fSKevin Coffman * by the authentication flavor to rq_callsize. 14357561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14367561042fSKevin Coffman */ 14372d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14382d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14392d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14402d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14412d2da60cSJ. Bruce Fields } 144200fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14437561042fSKevin Coffman /* slack space should prevent this ever happening: */ 14442d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 14452d2da60cSJ. Bruce Fields status = -EIO; 14462d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 14472d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 14482d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1449fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14502d2da60cSJ. Bruce Fields else if (maj_stat) 14512d2da60cSJ. Bruce Fields return status; 14522d2da60cSJ. Bruce Fields 14532d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 14542d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 14552d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 14562d2da60cSJ. Bruce Fields iov = snd_buf->tail; 14572d2da60cSJ. Bruce Fields else 14582d2da60cSJ. Bruce Fields iov = snd_buf->head; 14592d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 14602d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 14612d2da60cSJ. Bruce Fields memset(p, 0, pad); 14622d2da60cSJ. Bruce Fields iov->iov_len += pad; 14632d2da60cSJ. Bruce Fields snd_buf->len += pad; 14642d2da60cSJ. Bruce Fields 14652d2da60cSJ. Bruce Fields return 0; 14662d2da60cSJ. Bruce Fields } 14672d2da60cSJ. Bruce Fields 14681da177e4SLinus Torvalds static int 14691da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 14709f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 14711da177e4SLinus Torvalds { 1472a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 14731da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 14741da177e4SLinus Torvalds gc_base); 14751da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 14761da177e4SLinus Torvalds int status = -EIO; 14771da177e4SLinus Torvalds 1478632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 14791da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 14801da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 14811da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 14821da177e4SLinus Torvalds */ 14839f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14849f06c719SChuck Lever status = 0; 14851da177e4SLinus Torvalds goto out; 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds switch (gss_cred->gc_service) { 14881da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 14899f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14909f06c719SChuck Lever status = 0; 14911da177e4SLinus Torvalds break; 14921da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 149389f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 14941da177e4SLinus Torvalds break; 14951da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 149689f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 14971da177e4SLinus Torvalds break; 14981da177e4SLinus Torvalds } 14991da177e4SLinus Torvalds out: 15001da177e4SLinus Torvalds gss_put_ctx(ctx); 1501632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15021da177e4SLinus Torvalds return status; 15031da177e4SLinus Torvalds } 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds static inline int 15061da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1507d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15081da177e4SLinus Torvalds { 15091da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15101da177e4SLinus Torvalds struct xdr_buf integ_buf; 15111da177e4SLinus Torvalds struct xdr_netobj mic; 15121da177e4SLinus Torvalds u32 data_offset, mic_offset; 15131da177e4SLinus Torvalds u32 integ_len; 15141da177e4SLinus Torvalds u32 maj_stat; 15151da177e4SLinus Torvalds int status = -EIO; 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 15181da177e4SLinus Torvalds if (integ_len & 3) 15191da177e4SLinus Torvalds return status; 15201da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15211da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 15221da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 15231da177e4SLinus Torvalds return status; 15241da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15251da177e4SLinus Torvalds return status; 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15281da177e4SLinus Torvalds mic_offset - data_offset)) 15291da177e4SLinus Torvalds return status; 15301da177e4SLinus Torvalds 15311da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15321da177e4SLinus Torvalds return status; 15331da177e4SLinus Torvalds 153400fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15351da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1536fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15371da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15381da177e4SLinus Torvalds return status; 15391da177e4SLinus Torvalds return 0; 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds 15422d2da60cSJ. Bruce Fields static inline int 15432d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1544d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15452d2da60cSJ. Bruce Fields { 15462d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15472d2da60cSJ. Bruce Fields u32 offset; 15482d2da60cSJ. Bruce Fields u32 opaque_len; 15492d2da60cSJ. Bruce Fields u32 maj_stat; 15502d2da60cSJ. Bruce Fields int status = -EIO; 15512d2da60cSJ. Bruce Fields 15522d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 15532d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15542d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 15552d2da60cSJ. Bruce Fields return status; 15562d2da60cSJ. Bruce Fields /* remove padding: */ 15572d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 15582d2da60cSJ. Bruce Fields 155900fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 15602d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1561fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15622d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 15632d2da60cSJ. Bruce Fields return status; 15642d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 15652d2da60cSJ. Bruce Fields return status; 15662d2da60cSJ. Bruce Fields 15672d2da60cSJ. Bruce Fields return 0; 15682d2da60cSJ. Bruce Fields } 15692d2da60cSJ. Bruce Fields 1570bf269551SChuck Lever static int 1571bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1572bf269551SChuck Lever __be32 *p, void *obj) 1573bf269551SChuck Lever { 1574bf269551SChuck Lever struct xdr_stream xdr; 1575bf269551SChuck Lever 1576bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1577bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1578bf269551SChuck Lever } 15792d2da60cSJ. Bruce Fields 15801da177e4SLinus Torvalds static int 15811da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1582bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 15831da177e4SLinus Torvalds { 1584a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15851da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15861da177e4SLinus Torvalds gc_base); 15871da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1588d8ed029dSAlexey Dobriyan __be32 *savedp = p; 15892d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 15902d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 15911da177e4SLinus Torvalds int status = -EIO; 15921da177e4SLinus Torvalds 15931da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 15941da177e4SLinus Torvalds goto out_decode; 15951da177e4SLinus Torvalds switch (gss_cred->gc_service) { 15961da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 15971da177e4SLinus Torvalds break; 15981da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 15991da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 16001da177e4SLinus Torvalds if (status) 16011da177e4SLinus Torvalds goto out; 16021da177e4SLinus Torvalds break; 16031da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 16042d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 16052d2da60cSJ. Bruce Fields if (status) 16062d2da60cSJ. Bruce Fields goto out; 16071da177e4SLinus Torvalds break; 16081da177e4SLinus Torvalds } 160924b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16101be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16112d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 16121da177e4SLinus Torvalds out_decode: 1613bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16141da177e4SLinus Torvalds out: 16151da177e4SLinus Torvalds gss_put_ctx(ctx); 1616632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1617632f0d05SChuck Lever task->tk_pid, __func__, status); 16181da177e4SLinus Torvalds return status; 16191da177e4SLinus Torvalds } 16201da177e4SLinus Torvalds 1621f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 16221da177e4SLinus Torvalds .owner = THIS_MODULE, 16231da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16241da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 16251da177e4SLinus Torvalds .create = gss_create, 16261da177e4SLinus Torvalds .destroy = gss_destroy, 16271da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 162880df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 162980df9d20SStanislav Kinsbursky .pipes_create = gss_pipes_dentries_create, 163080df9d20SStanislav Kinsbursky .pipes_destroy = gss_pipes_dentries_destroy, 16316a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16321da177e4SLinus Torvalds }; 16331da177e4SLinus Torvalds 1634f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 16351da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 16361da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1637fba3bad4STrond Myklebust .cr_init = gss_cred_init, 16385c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16391da177e4SLinus Torvalds .crmatch = gss_match, 16401da177e4SLinus Torvalds .crmarshal = gss_marshal, 16411da177e4SLinus Torvalds .crrefresh = gss_refresh, 16421da177e4SLinus Torvalds .crvalidate = gss_validate, 16431da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 16441da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 16451da177e4SLinus Torvalds }; 16461da177e4SLinus Torvalds 16470df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 16480df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 16496dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 16505c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16510df7fb74STrond Myklebust .crmatch = gss_match, 16520df7fb74STrond Myklebust .crmarshal = gss_marshal, 16530df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 16540df7fb74STrond Myklebust .crvalidate = gss_validate, 16550df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 16560df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 16570df7fb74STrond Myklebust }; 16580df7fb74STrond Myklebust 1659b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1660c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 16611da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 16621da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 166334769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 166434769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 166534769fc4S\"J. Bruce Fields\ }; 166634769fc4S\"J. Bruce Fields\ 1667b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1668c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 166934769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 167034769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 167134769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 16721da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 16731da177e4SLinus Torvalds }; 16741da177e4SLinus Torvalds 1675a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 1676a1db410dSStanislav Kinsbursky { 1677a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 1678a1db410dSStanislav Kinsbursky } 1679a1db410dSStanislav Kinsbursky 1680a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 1681a1db410dSStanislav Kinsbursky { 1682a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 1683a1db410dSStanislav Kinsbursky } 1684a1db410dSStanislav Kinsbursky 1685a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 1686a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 1687a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1688a1db410dSStanislav Kinsbursky }; 1689a1db410dSStanislav Kinsbursky 16901da177e4SLinus Torvalds /* 16911da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 16921da177e4SLinus Torvalds */ 16931da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 16941da177e4SLinus Torvalds { 16951da177e4SLinus Torvalds int err = 0; 16961da177e4SLinus Torvalds 16971da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 16981da177e4SLinus Torvalds if (err) 16991da177e4SLinus Torvalds goto out; 17001da177e4SLinus Torvalds err = gss_svc_init(); 17011da177e4SLinus Torvalds if (err) 17021da177e4SLinus Torvalds goto out_unregister; 1703a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1704a1db410dSStanislav Kinsbursky if (err) 1705a1db410dSStanislav Kinsbursky goto out_svc_exit; 170679a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17071da177e4SLinus Torvalds return 0; 1708a1db410dSStanislav Kinsbursky out_svc_exit: 1709a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 17101da177e4SLinus Torvalds out_unregister: 17111da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 17121da177e4SLinus Torvalds out: 17131da177e4SLinus Torvalds return err; 17141da177e4SLinus Torvalds } 17151da177e4SLinus Torvalds 17161da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 17171da177e4SLinus Torvalds { 1718a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17191da177e4SLinus Torvalds gss_svc_shutdown(); 17201da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 1721bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17221da177e4SLinus Torvalds } 17231da177e4SLinus Torvalds 17241da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1725126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 1726126e216aSTrond Myklebust gss_expired_cred_retry_delay, 1727126e216aSTrond Myklebust uint, 0644); 1728126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1729126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 1730126e216aSTrond Myklebust 17311da177e4SLinus Torvalds module_init(init_rpcsec_gss) 17321da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1733