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\ { 39890602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 39990602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 40090602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 40190602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 40290602c7bSEric W. Biederman BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); 40334769fc4S\"J. Bruce Fields\ } 40434769fc4S\"J. Bruce Fields\ 4058b1c7bf5SOlga Kornievskaia static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 40668c97153STrond Myklebust struct rpc_clnt *clnt, 40768c97153STrond Myklebust const char *service_name) 40834769fc4S\"J. Bruce Fields\ { 409683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4108b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4118b1c7bf5SOlga Kornievskaia int len = 0; 4128b1c7bf5SOlga Kornievskaia 4138b1c7bf5SOlga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 414683ac665STrond Myklebust mech->gm_name, 41590602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4168b1c7bf5SOlga Kornievskaia p += gss_msg->msg.len; 4178b1c7bf5SOlga Kornievskaia if (clnt->cl_principal) { 4188b1c7bf5SOlga Kornievskaia len = sprintf(p, "target=%s ", clnt->cl_principal); 4198b1c7bf5SOlga Kornievskaia p += len; 4208b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4218b1c7bf5SOlga Kornievskaia } 42268c97153STrond Myklebust if (service_name != NULL) { 42368c97153STrond Myklebust len = sprintf(p, "service=%s ", service_name); 4242efef708SOlga Kornievskaia p += len; 4252efef708SOlga Kornievskaia gss_msg->msg.len += len; 4262efef708SOlga Kornievskaia } 427683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 428f8628220SKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 429683ac665STrond Myklebust p += len; 430683ac665STrond Myklebust gss_msg->msg.len += len; 431683ac665STrond Myklebust } 4328b1c7bf5SOlga Kornievskaia len = sprintf(p, "\n"); 4338b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4348b1c7bf5SOlga Kornievskaia 43534769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 43634769fc4S\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 43734769fc4S\"J. Bruce Fields\ } 43834769fc4S\"J. Bruce Fields\ 4398b1c7bf5SOlga Kornievskaia static void gss_encode_msg(struct gss_upcall_msg *gss_msg, 44068c97153STrond Myklebust struct rpc_clnt *clnt, 44168c97153STrond Myklebust const char *service_name) 44234769fc4S\"J. Bruce Fields\ { 44334769fc4S\"J. Bruce Fields\ if (pipe_version == 0) 44434769fc4S\"J. Bruce Fields\ gss_encode_v0_msg(gss_msg); 44534769fc4S\"J. Bruce Fields\ else /* pipe_version == 1 */ 44668c97153STrond Myklebust gss_encode_v1_msg(gss_msg, clnt, service_name); 44734769fc4S\"J. Bruce Fields\ } 44834769fc4S\"J. Bruce Fields\ 44968c97153STrond Myklebust static struct gss_upcall_msg * 45068c97153STrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt, 4517eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 4521da177e4SLinus Torvalds { 4531da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 45479a3f20bS\"J. Bruce Fields\ int vers; 4551da177e4SLinus Torvalds 4560f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 457db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 458db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 45979a3f20bS\"J. Bruce Fields\ vers = get_pipe_version(); 46079a3f20bS\"J. Bruce Fields\ if (vers < 0) { 46179a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 46279a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 46379a3f20bS\"J. Bruce Fields\ } 464c239d83bSStanislav Kinsbursky gss_msg->pipe = gss_auth->pipe[vers]; 4651da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 4661da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 4671da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 4681da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 4691da177e4SLinus Torvalds gss_msg->uid = uid; 4701da177e4SLinus Torvalds gss_msg->auth = gss_auth; 47168c97153STrond Myklebust gss_encode_msg(gss_msg, clnt, service_name); 4721da177e4SLinus Torvalds return gss_msg; 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds static struct gss_upcall_msg * 4761da177e4SLinus Torvalds gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 4771da177e4SLinus Torvalds { 4787c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4797c67db3aSTrond Myklebust struct gss_cred, gc_base); 4801da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4817eaf040bSEric W. Biederman kuid_t uid = cred->cr_uid; 4821da177e4SLinus Torvalds 48368c97153STrond Myklebust gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal); 484db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 485db75b3d6S\"J. Bruce Fields\ return gss_new; 486053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 4871da177e4SLinus Torvalds if (gss_msg == gss_new) { 4889beae467SStanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4891da177e4SLinus Torvalds if (res) { 4901da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4911da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds } else 4941da177e4SLinus Torvalds gss_release_msg(gss_new); 4951da177e4SLinus Torvalds return gss_msg; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 498b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 499b03568c3S\"J. Bruce Fields\ { 500b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 501b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 502b03568c3S\"J. Bruce Fields\ 503b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 504b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 505b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 506b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 507b03568c3S\"J. Bruce Fields\ } 508b03568c3S\"J. Bruce Fields\ } 509b03568c3S\"J. Bruce Fields\ 5101da177e4SLinus Torvalds static inline int 5111da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5121da177e4SLinus Torvalds { 513a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5144a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5151da177e4SLinus Torvalds struct gss_auth, rpc_auth); 5161da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5171da177e4SLinus Torvalds struct gss_cred, gc_base); 5181da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5199beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5201da177e4SLinus Torvalds int err = 0; 5211da177e4SLinus Torvalds 522632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 523cdba321eSEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 5241da177e4SLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 525480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 52679a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 52779a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 52879a3f20bS\"J. Bruce Fields\ warn_gssd(); 52979a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 53079a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 531d1a8016aSBryan Schumaker return -EAGAIN; 53279a3f20bS\"J. Bruce Fields\ } 5331da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5341da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5351da177e4SLinus Torvalds goto out; 5361da177e4SLinus Torvalds } 5379beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5389beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5391da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 5405d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 541126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5421da177e4SLinus Torvalds task->tk_timeout = 0; 5431da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 5441da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5451da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 5465d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 547126e216aSTrond Myklebust } else { 548126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5491da177e4SLinus Torvalds err = gss_msg->msg.errno; 550126e216aSTrond Myklebust } 5519beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5521da177e4SLinus Torvalds gss_release_msg(gss_msg); 5531da177e4SLinus Torvalds out: 554632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 555cdba321eSEric W. Biederman task->tk_pid, __func__, 556cdba321eSEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 5571da177e4SLinus Torvalds return err; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds static inline int 5611da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5621da177e4SLinus Torvalds { 5639beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 5641da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5651da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 5661da177e4SLinus Torvalds DEFINE_WAIT(wait); 5671da177e4SLinus Torvalds int err = 0; 5681da177e4SLinus Torvalds 569cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 570cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 57179a3f20bS\"J. Bruce Fields\ retry: 5721da177e4SLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 57379a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 57479a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 57579a3f20bS\"J. Bruce Fields\ pipe_version >= 0, 15*HZ); 576d1a8016aSBryan Schumaker if (pipe_version < 0) { 577d1a8016aSBryan Schumaker warn_gssd(); 578d1a8016aSBryan Schumaker err = -EACCES; 579d1a8016aSBryan Schumaker } 58079a3f20bS\"J. Bruce Fields\ if (err) 58179a3f20bS\"J. Bruce Fields\ goto out; 58279a3f20bS\"J. Bruce Fields\ goto retry; 58379a3f20bS\"J. Bruce Fields\ } 5841da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 5851da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 5861da177e4SLinus Torvalds goto out; 5871da177e4SLinus Torvalds } 5889beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 5891da177e4SLinus Torvalds for (;;) { 5905afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 5919beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 5921da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 5931da177e4SLinus Torvalds break; 5941da177e4SLinus Torvalds } 5959beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 5965afa9133STrond Myklebust if (fatal_signal_pending(current)) { 5971da177e4SLinus Torvalds err = -ERESTARTSYS; 5981da177e4SLinus Torvalds goto out_intr; 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds schedule(); 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds if (gss_msg->ctx) 6037b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6041da177e4SLinus Torvalds else 6051da177e4SLinus Torvalds err = gss_msg->msg.errno; 6069beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6071da177e4SLinus Torvalds out_intr: 6081da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6091da177e4SLinus Torvalds gss_release_msg(gss_msg); 6101da177e4SLinus Torvalds out: 611632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 612cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6131da177e4SLinus Torvalds return err; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds static ssize_t 6191da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6201da177e4SLinus Torvalds { 6211da177e4SLinus Torvalds const void *p, *end; 6221da177e4SLinus Torvalds void *buf; 6231da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6249beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(filp->f_dentry->d_inode)->pipe; 6251da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 62690602c7bSEric W. Biederman uid_t id; 62790602c7bSEric W. Biederman kuid_t uid; 6283b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6311da177e4SLinus Torvalds goto out; 6321da177e4SLinus Torvalds err = -ENOMEM; 6330f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6341da177e4SLinus Torvalds if (!buf) 6351da177e4SLinus Torvalds goto out; 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds err = -EFAULT; 6381da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 6391da177e4SLinus Torvalds goto err; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 64290602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6431da177e4SLinus Torvalds if (IS_ERR(p)) { 6441da177e4SLinus Torvalds err = PTR_ERR(p); 6451da177e4SLinus Torvalds goto err; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 64890602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 64990602c7bSEric W. Biederman if (!uid_valid(uid)) { 65090602c7bSEric W. Biederman err = -EINVAL; 65190602c7bSEric W. Biederman goto err; 65290602c7bSEric W. Biederman } 65390602c7bSEric W. Biederman 6541da177e4SLinus Torvalds err = -ENOMEM; 6551da177e4SLinus Torvalds ctx = gss_alloc_context(); 6561da177e4SLinus Torvalds if (ctx == NULL) 6571da177e4SLinus Torvalds goto err; 6583b68aaeaSTrond Myklebust 6593b68aaeaSTrond Myklebust err = -ENOENT; 6603b68aaeaSTrond Myklebust /* Find a matching upcall */ 6619beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6629beae467SStanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6633b68aaeaSTrond Myklebust if (gss_msg == NULL) { 6649beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6653b68aaeaSTrond Myklebust goto err_put_ctx; 6663b68aaeaSTrond Myklebust } 6673b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 6689beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6693b68aaeaSTrond Myklebust 6706e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6711da177e4SLinus Torvalds if (IS_ERR(p)) { 6721da177e4SLinus Torvalds err = PTR_ERR(p); 673486bad2eSJeff Layton switch (err) { 674486bad2eSJeff Layton case -EACCES: 675dc5ddce9SJeff Layton case -EKEYEXPIRED: 676486bad2eSJeff Layton gss_msg->msg.errno = err; 677486bad2eSJeff Layton err = mlen; 678486bad2eSJeff Layton break; 679486bad2eSJeff Layton case -EFAULT: 680486bad2eSJeff Layton case -ENOMEM: 681486bad2eSJeff Layton case -EINVAL: 682486bad2eSJeff Layton case -ENOSYS: 683486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 684486bad2eSJeff Layton break; 685486bad2eSJeff Layton default: 686486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 6876c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 688486bad2eSJeff Layton BUG(); 689486bad2eSJeff Layton } 6903b68aaeaSTrond Myklebust goto err_release_msg; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 6933b68aaeaSTrond Myklebust err = mlen; 6943b68aaeaSTrond Myklebust 6953b68aaeaSTrond Myklebust err_release_msg: 6969beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6971da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 6989beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6991da177e4SLinus Torvalds gss_release_msg(gss_msg); 7001da177e4SLinus Torvalds err_put_ctx: 7011da177e4SLinus Torvalds gss_put_ctx(ctx); 7021da177e4SLinus Torvalds err: 7031da177e4SLinus Torvalds kfree(buf); 7041da177e4SLinus Torvalds out: 705632f0d05SChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7061da177e4SLinus Torvalds return err; 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds 70934769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 710cf81939dS\"J. Bruce Fields\ { 71134769fc4S\"J. Bruce Fields\ int ret = 0; 71234769fc4S\"J. Bruce Fields\ 71379a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 71479a3f20bS\"J. Bruce Fields\ if (pipe_version < 0) { 71534769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 71634769fc4S\"J. Bruce Fields\ pipe_version = new_version; 71779a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 71879a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 71934769fc4S\"J. Bruce Fields\ } else if (pipe_version != new_version) { 72034769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 72134769fc4S\"J. Bruce Fields\ ret = -EBUSY; 72234769fc4S\"J. Bruce Fields\ goto out; 72379a3f20bS\"J. Bruce Fields\ } 724cf81939dS\"J. Bruce Fields\ atomic_inc(&pipe_users); 72534769fc4S\"J. Bruce Fields\ out: 72679a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 72734769fc4S\"J. Bruce Fields\ return ret; 72834769fc4S\"J. Bruce Fields\ 72934769fc4S\"J. Bruce Fields\ } 73034769fc4S\"J. Bruce Fields\ 73134769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 73234769fc4S\"J. Bruce Fields\ { 73334769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 73434769fc4S\"J. Bruce Fields\ } 73534769fc4S\"J. Bruce Fields\ 73634769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 73734769fc4S\"J. Bruce Fields\ { 73834769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 739cf81939dS\"J. Bruce Fields\ } 740cf81939dS\"J. Bruce Fields\ 7411da177e4SLinus Torvalds static void 7421da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 7431da177e4SLinus Torvalds { 7449beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7451da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 7461da177e4SLinus Torvalds 7475a67657aSTrond Myklebust restart: 7489beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7499beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7506e84c7b6STrond Myklebust 7515a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7525a67657aSTrond Myklebust continue; 7531da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 7541da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7551da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7569beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7571da177e4SLinus Torvalds gss_release_msg(gss_msg); 7585a67657aSTrond Myklebust goto restart; 7591da177e4SLinus Torvalds } 7609beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 761cf81939dS\"J. Bruce Fields\ 76279a3f20bS\"J. Bruce Fields\ put_pipe_version(); 7631da177e4SLinus Torvalds } 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds static void 7661da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7671da177e4SLinus Torvalds { 7681da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds if (msg->errno < 0) { 771632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 772632f0d05SChuck Lever __func__, gss_msg); 7731da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 7741da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 775b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 776b03568c3S\"J. Bruce Fields\ warn_gssd(); 7771da177e4SLinus Torvalds gss_release_msg(gss_msg); 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds } 7801da177e4SLinus Torvalds 781ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy(struct rpc_auth *auth) 782ccdc28f8SStanislav Kinsbursky { 783ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 784ccdc28f8SStanislav Kinsbursky 785ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 78680df9d20SStanislav Kinsbursky if (gss_auth->pipe[0]->dentry) 787ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[0]->dentry); 78880df9d20SStanislav Kinsbursky if (gss_auth->pipe[1]->dentry) 789ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 790ccdc28f8SStanislav Kinsbursky } 791ccdc28f8SStanislav Kinsbursky 792ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create(struct rpc_auth *auth) 793ccdc28f8SStanislav Kinsbursky { 794ccdc28f8SStanislav Kinsbursky int err; 795ccdc28f8SStanislav Kinsbursky struct gss_auth *gss_auth; 796ccdc28f8SStanislav Kinsbursky struct rpc_clnt *clnt; 797ccdc28f8SStanislav Kinsbursky 798ccdc28f8SStanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 799ccdc28f8SStanislav Kinsbursky clnt = gss_auth->client; 800ccdc28f8SStanislav Kinsbursky 80130507f58SStanislav Kinsbursky gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 802ccdc28f8SStanislav Kinsbursky "gssd", 803ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[1]); 804ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1]->dentry)) 805ccdc28f8SStanislav Kinsbursky return PTR_ERR(gss_auth->pipe[1]->dentry); 80630507f58SStanislav Kinsbursky gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 807ccdc28f8SStanislav Kinsbursky gss_auth->mech->gm_name, 808ccdc28f8SStanislav Kinsbursky clnt, gss_auth->pipe[0]); 809ccdc28f8SStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0]->dentry)) { 810ccdc28f8SStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]->dentry); 811ccdc28f8SStanislav Kinsbursky goto err_unlink_pipe_1; 812ccdc28f8SStanislav Kinsbursky } 813ccdc28f8SStanislav Kinsbursky return 0; 814ccdc28f8SStanislav Kinsbursky 815ccdc28f8SStanislav Kinsbursky err_unlink_pipe_1: 816ccdc28f8SStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 817ccdc28f8SStanislav Kinsbursky return err; 818ccdc28f8SStanislav Kinsbursky } 819ccdc28f8SStanislav Kinsbursky 820ccdc28f8SStanislav Kinsbursky static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, 821ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 822ccdc28f8SStanislav Kinsbursky { 8232446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 824ccdc28f8SStanislav Kinsbursky struct super_block *sb; 825ccdc28f8SStanislav Kinsbursky 826ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 827ccdc28f8SStanislav Kinsbursky if (sb) { 82830507f58SStanislav Kinsbursky if (clnt->cl_dentry) 829ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy(auth); 830ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 831ccdc28f8SStanislav Kinsbursky } 832ccdc28f8SStanislav Kinsbursky } 833ccdc28f8SStanislav Kinsbursky 834ccdc28f8SStanislav Kinsbursky static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, 835ccdc28f8SStanislav Kinsbursky struct rpc_auth *auth) 836ccdc28f8SStanislav Kinsbursky { 8372446ab60STrond Myklebust struct net *net = rpc_net_ns(clnt); 838ccdc28f8SStanislav Kinsbursky struct super_block *sb; 839ccdc28f8SStanislav Kinsbursky int err = 0; 840ccdc28f8SStanislav Kinsbursky 841ccdc28f8SStanislav Kinsbursky sb = rpc_get_sb_net(net); 842ccdc28f8SStanislav Kinsbursky if (sb) { 84330507f58SStanislav Kinsbursky if (clnt->cl_dentry) 844ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create(auth); 845ccdc28f8SStanislav Kinsbursky rpc_put_sb_net(net); 846ccdc28f8SStanislav Kinsbursky } 847ccdc28f8SStanislav Kinsbursky return err; 848ccdc28f8SStanislav Kinsbursky } 849ccdc28f8SStanislav Kinsbursky 8501da177e4SLinus Torvalds /* 8511da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 8521da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8531da177e4SLinus Torvalds */ 8541da177e4SLinus Torvalds static struct rpc_auth * 8551da177e4SLinus Torvalds gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 8561da177e4SLinus Torvalds { 8571da177e4SLinus Torvalds struct gss_auth *gss_auth; 8581da177e4SLinus Torvalds struct rpc_auth * auth; 8596a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 8646a19275aSJ. Bruce Fields return ERR_PTR(err); 8651da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8661da177e4SLinus Torvalds goto out_dec; 8671da177e4SLinus Torvalds gss_auth->client = clnt; 8686a19275aSJ. Bruce Fields err = -EINVAL; 8691da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 8701da177e4SLinus Torvalds if (!gss_auth->mech) { 8713392c349SJames Morris printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n", 8720dc47877SHarvey Harrison __func__, flavor); 8731da177e4SLinus Torvalds goto err_free; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 876438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 877438b6fdeSJ. Bruce Fields goto err_put_mech; 8781da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 8791da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 8801da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 8811da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 8821da177e4SLinus Torvalds auth->au_flavor = flavor; 8831da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 8840285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 8851da177e4SLinus Torvalds 88634769fc4S\"J. Bruce Fields\ /* 88734769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 88834769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 88934769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 89034769fc4S\"J. Bruce Fields\ * the new pipe first. 89134769fc4S\"J. Bruce Fields\ */ 892c239d83bSStanislav Kinsbursky gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1, 89334769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 894c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1])) { 895c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[1]); 8961da177e4SLinus Torvalds goto err_put_mech; 8976a19275aSJ. Bruce Fields } 8981da177e4SLinus Torvalds 899c239d83bSStanislav Kinsbursky gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0, 90034769fc4S\"J. Bruce Fields\ RPC_PIPE_WAIT_FOR_OPEN); 901c239d83bSStanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0])) { 902c239d83bSStanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]); 903c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 904c239d83bSStanislav Kinsbursky } 905ccdc28f8SStanislav Kinsbursky err = gss_pipes_dentries_create_net(clnt, auth); 906ccdc28f8SStanislav Kinsbursky if (err) 907c239d83bSStanislav Kinsbursky goto err_destroy_pipe_0; 908f5c2187cSTrond Myklebust err = rpcauth_init_credcache(auth); 90907a2bf1dSTrond Myklebust if (err) 910ccdc28f8SStanislav Kinsbursky goto err_unlink_pipes; 91107a2bf1dSTrond Myklebust 9121da177e4SLinus Torvalds return auth; 913ccdc28f8SStanislav Kinsbursky err_unlink_pipes: 914ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(clnt, auth); 915c239d83bSStanislav Kinsbursky err_destroy_pipe_0: 916c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 917c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 918c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9191da177e4SLinus Torvalds err_put_mech: 9201da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 9211da177e4SLinus Torvalds err_free: 9221da177e4SLinus Torvalds kfree(gss_auth); 9231da177e4SLinus Torvalds out_dec: 9241da177e4SLinus Torvalds module_put(THIS_MODULE); 9256a19275aSJ. Bruce Fields return ERR_PTR(err); 9261da177e4SLinus Torvalds } 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds static void 9290285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 9300285ed1fSTrond Myklebust { 931ccdc28f8SStanislav Kinsbursky gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); 932c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 933c239d83bSStanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9340285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 9350285ed1fSTrond Myklebust 9360285ed1fSTrond Myklebust kfree(gss_auth); 9370285ed1fSTrond Myklebust module_put(THIS_MODULE); 9380285ed1fSTrond Myklebust } 9390285ed1fSTrond Myklebust 9400285ed1fSTrond Myklebust static void 9410285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 9420285ed1fSTrond Myklebust { 9430285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9440285ed1fSTrond Myklebust 9450285ed1fSTrond Myklebust gss_free(gss_auth); 9460285ed1fSTrond Myklebust } 9470285ed1fSTrond Myklebust 9480285ed1fSTrond Myklebust static void 9491da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 9501da177e4SLinus Torvalds { 9511da177e4SLinus Torvalds struct gss_auth *gss_auth; 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9541da177e4SLinus Torvalds auth, auth->au_flavor); 9551da177e4SLinus Torvalds 9563ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 9573ab9bb72STrond Myklebust 9581da177e4SLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 9590285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 9601da177e4SLinus Torvalds } 9611da177e4SLinus Torvalds 9620df7fb74STrond Myklebust /* 9630df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 9640df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 9650df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 9660df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 9670df7fb74STrond Myklebust */ 9680df7fb74STrond Myklebust static int 9690df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 9700df7fb74STrond Myklebust { 9710df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 9720df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 9730df7fb74STrond Myklebust struct rpc_task *task; 9740df7fb74STrond Myklebust 9750df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 9766dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 9770df7fb74STrond Myklebust return 0; 9780df7fb74STrond Myklebust 9790df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 9800df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 9810df7fb74STrond Myklebust 9820df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 9830df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 9840df7fb74STrond Myklebust get_rpccred(cred); 9850df7fb74STrond Myklebust 986080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 9870df7fb74STrond Myklebust if (!IS_ERR(task)) 9880df7fb74STrond Myklebust rpc_put_task(task); 9890df7fb74STrond Myklebust 9900df7fb74STrond Myklebust put_rpccred(cred); 9910df7fb74STrond Myklebust return 1; 9920df7fb74STrond Myklebust } 9930df7fb74STrond Myklebust 9940df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 9951da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 9961da177e4SLinus Torvalds * allocated before freeing them. */ 9971da177e4SLinus Torvalds static void 9985d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 9991da177e4SLinus Torvalds { 1000632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 10011da177e4SLinus Torvalds 10020d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 10031da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 10041da177e4SLinus Torvalds kfree(ctx); 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds static void 10085d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 10095d28dc82STrond Myklebust { 10105d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 10115d28dc82STrond Myklebust gss_do_free_ctx(ctx); 10125d28dc82STrond Myklebust } 10135d28dc82STrond Myklebust 10145d28dc82STrond Myklebust static void 10155d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 10165d28dc82STrond Myklebust { 10175d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10185d28dc82STrond Myklebust } 10195d28dc82STrond Myklebust 10205d28dc82STrond Myklebust static void 102131be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 10221da177e4SLinus Torvalds { 1023632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 102431be5bf1STrond Myklebust kfree(gss_cred); 102531be5bf1STrond Myklebust } 10261da177e4SLinus Torvalds 102731be5bf1STrond Myklebust static void 102831be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 102931be5bf1STrond Myklebust { 103031be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 103131be5bf1STrond Myklebust gss_free_cred(gss_cred); 103231be5bf1STrond Myklebust } 10331da177e4SLinus Torvalds 103431be5bf1STrond Myklebust static void 10356dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 103631be5bf1STrond Myklebust { 10375d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10380285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10395d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10405d28dc82STrond Myklebust 1041a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 104231be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10435d28dc82STrond Myklebust if (ctx) 10445d28dc82STrond Myklebust gss_put_ctx(ctx); 10450285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 10486dcd3926SJeff Layton static void 10496dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 10506dcd3926SJeff Layton { 10516dcd3926SJeff Layton 10526dcd3926SJeff Layton if (gss_destroying_context(cred)) 10536dcd3926SJeff Layton return; 10546dcd3926SJeff Layton gss_destroy_nullcred(cred); 10556dcd3926SJeff Layton } 10566dcd3926SJeff Layton 10571da177e4SLinus Torvalds /* 10581da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 10591da177e4SLinus Torvalds */ 10601da177e4SLinus Torvalds static struct rpc_cred * 10618a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10621da177e4SLinus Torvalds { 10638a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds static struct rpc_cred * 10678a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10681da177e4SLinus Torvalds { 10691da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 10701da177e4SLinus Torvalds struct gss_cred *cred = NULL; 10711da177e4SLinus Torvalds int err = -ENOMEM; 10721da177e4SLinus Torvalds 1073632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1074cdba321eSEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1075cdba321eSEric W. Biederman auth->au_flavor); 10761da177e4SLinus Torvalds 10770f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 10781da177e4SLinus Torvalds goto out_err; 10791da177e4SLinus Torvalds 10805fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 10811da177e4SLinus Torvalds /* 10821da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 10831da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 10841da177e4SLinus Torvalds */ 1085fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 10861da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 108768c97153STrond Myklebust cred->gc_principal = NULL; 108868c97153STrond Myklebust if (acred->machine_cred) 108968c97153STrond Myklebust cred->gc_principal = acred->principal; 10900285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 10911da177e4SLinus Torvalds return &cred->gc_base; 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds out_err: 1094632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 10951da177e4SLinus Torvalds return ERR_PTR(err); 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds static int 1099fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1100fba3bad4STrond Myklebust { 1101fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1102fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1103fba3bad4STrond Myklebust int err; 1104fba3bad4STrond Myklebust 1105fba3bad4STrond Myklebust do { 1106fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1107fba3bad4STrond Myklebust } while (err == -EAGAIN); 1108fba3bad4STrond Myklebust return err; 1109fba3bad4STrond Myklebust } 1110fba3bad4STrond Myklebust 1111fba3bad4STrond Myklebust static int 11128a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11131da177e4SLinus Torvalds { 11141da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11151da177e4SLinus Torvalds 1116cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11178a317760STrond Myklebust goto out; 11181da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1119cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1120cd019f75STrond Myklebust return 0; 1121cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11221da177e4SLinus Torvalds return 0; 11238a317760STrond Myklebust out: 112468c97153STrond Myklebust if (acred->principal != NULL) { 112568c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 112668c97153STrond Myklebust return 0; 112768c97153STrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 112868c97153STrond Myklebust } 112968c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 11307c67db3aSTrond Myklebust return 0; 11310b4d51b0SEric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds /* 11351da177e4SLinus Torvalds * Marshal credentials. 11361da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 11371da177e4SLinus Torvalds */ 1138d8ed029dSAlexey Dobriyan static __be32 * 1139d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 11401da177e4SLinus Torvalds { 1141a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1142a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 11431da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11441da177e4SLinus Torvalds gc_base); 11451da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1146d8ed029dSAlexey Dobriyan __be32 *cred_len; 11471da177e4SLinus Torvalds u32 maj_stat = 0; 11481da177e4SLinus Torvalds struct xdr_netobj mic; 11491da177e4SLinus Torvalds struct kvec iov; 11501da177e4SLinus Torvalds struct xdr_buf verf_buf; 11511da177e4SLinus Torvalds 1152632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11551da177e4SLinus Torvalds cred_len = p++; 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 11581da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 11591da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 11621da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 11631da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 11641da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 11651da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 11661da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 11671da177e4SLinus Torvalds 11681da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 11691da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1170808012fbSChuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 1171808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 11721da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 11731da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds /* set verifier flavor*/ 11761da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 117900fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 11801da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1181fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 11821da177e4SLinus Torvalds } else if (maj_stat != 0) { 11831da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 11841da177e4SLinus Torvalds goto out_put_ctx; 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 11871da177e4SLinus Torvalds gss_put_ctx(ctx); 11881da177e4SLinus Torvalds return p; 11891da177e4SLinus Torvalds out_put_ctx: 11901da177e4SLinus Torvalds gss_put_ctx(ctx); 11911da177e4SLinus Torvalds return NULL; 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 1194cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1195cd019f75STrond Myklebust { 1196a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1197cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1198cd019f75STrond Myklebust struct gss_cred, 1199cd019f75STrond Myklebust gc_base); 1200cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1201cd019f75STrond Myklebust struct auth_cred acred = { 1202cd019f75STrond Myklebust .uid = oldcred->cr_uid, 120368c97153STrond Myklebust .principal = gss_cred->gc_principal, 120468c97153STrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1205cd019f75STrond Myklebust }; 1206cd019f75STrond Myklebust struct rpc_cred *new; 1207cd019f75STrond Myklebust 1208cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1209cd019f75STrond Myklebust if (IS_ERR(new)) 1210cd019f75STrond Myklebust return PTR_ERR(new); 1211a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1212cd019f75STrond Myklebust put_rpccred(oldcred); 1213cd019f75STrond Myklebust return 0; 1214cd019f75STrond Myklebust } 1215cd019f75STrond Myklebust 1216126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1217126e216aSTrond Myklebust { 1218126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1219126e216aSTrond Myklebust unsigned long now = jiffies; 1220126e216aSTrond Myklebust unsigned long begin, expire; 1221126e216aSTrond Myklebust struct gss_cred *gss_cred; 1222126e216aSTrond Myklebust 1223126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1224126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1225126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1226126e216aSTrond Myklebust 1227126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1228126e216aSTrond Myklebust return 1; 1229126e216aSTrond Myklebust } 1230126e216aSTrond Myklebust return 0; 1231126e216aSTrond Myklebust } 1232126e216aSTrond Myklebust 12331da177e4SLinus Torvalds /* 12341da177e4SLinus Torvalds * Refresh credentials. XXX - finish 12351da177e4SLinus Torvalds */ 12361da177e4SLinus Torvalds static int 12371da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 12381da177e4SLinus Torvalds { 1239a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1240cd019f75STrond Myklebust int ret = 0; 12411da177e4SLinus Torvalds 1242126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1243126e216aSTrond Myklebust return -EKEYEXPIRED; 1244126e216aSTrond Myklebust 1245cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1246cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1247cd019f75STrond Myklebust ret = gss_renew_cred(task); 1248cd019f75STrond Myklebust if (ret < 0) 1249cd019f75STrond Myklebust goto out; 1250a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1251cd019f75STrond Myklebust } 1252cd019f75STrond Myklebust 1253cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1254cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1255cd019f75STrond Myklebust out: 1256cd019f75STrond Myklebust return ret; 12571da177e4SLinus Torvalds } 12581da177e4SLinus Torvalds 12590df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 12600df7fb74STrond Myklebust static int 12610df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 12620df7fb74STrond Myklebust { 12630df7fb74STrond Myklebust return -EACCES; 12640df7fb74STrond Myklebust } 12650df7fb74STrond Myklebust 1266d8ed029dSAlexey Dobriyan static __be32 * 1267d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 12681da177e4SLinus Torvalds { 1269a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 12701da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1271d8ed029dSAlexey Dobriyan __be32 seq; 12721da177e4SLinus Torvalds struct kvec iov; 12731da177e4SLinus Torvalds struct xdr_buf verf_buf; 12741da177e4SLinus Torvalds struct xdr_netobj mic; 12751da177e4SLinus Torvalds u32 flav,len; 12761da177e4SLinus Torvalds u32 maj_stat; 12771da177e4SLinus Torvalds 1278632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds flav = ntohl(*p++); 12811da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 12821da177e4SLinus Torvalds goto out_bad; 12831da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 12841da177e4SLinus Torvalds goto out_bad; 12851da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 12861da177e4SLinus Torvalds iov.iov_base = &seq; 12871da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 12881da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 12891da177e4SLinus Torvalds mic.data = (u8 *)p; 12901da177e4SLinus Torvalds mic.len = len; 12911da177e4SLinus Torvalds 129200fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 12931da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1294fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12950df7fb74STrond Myklebust if (maj_stat) { 1296632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1297632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 12981da177e4SLinus Torvalds goto out_bad; 12990df7fb74STrond Myklebust } 130024b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 130124b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 13021be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 13031da177e4SLinus Torvalds gss_put_ctx(ctx); 1304632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1305632f0d05SChuck Lever task->tk_pid, __func__); 13061da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 13071da177e4SLinus Torvalds out_bad: 13081da177e4SLinus Torvalds gss_put_ctx(ctx); 1309632f0d05SChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 13101da177e4SLinus Torvalds return NULL; 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds 13139f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13149f06c719SChuck Lever __be32 *p, void *obj) 13159f06c719SChuck Lever { 13169f06c719SChuck Lever struct xdr_stream xdr; 13179f06c719SChuck Lever 13189f06c719SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13199f06c719SChuck Lever encode(rqstp, &xdr, obj); 13209f06c719SChuck Lever } 13219f06c719SChuck Lever 13221da177e4SLinus Torvalds static inline int 13231da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13249f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13259f06c719SChuck Lever __be32 *p, void *obj) 13261da177e4SLinus Torvalds { 13271da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13281da177e4SLinus Torvalds struct xdr_buf integ_buf; 1329d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 13301da177e4SLinus Torvalds struct xdr_netobj mic; 1331d8ed029dSAlexey Dobriyan u32 offset; 1332d8ed029dSAlexey Dobriyan __be32 *q; 13331da177e4SLinus Torvalds struct kvec *iov; 13341da177e4SLinus Torvalds u32 maj_stat = 0; 13351da177e4SLinus Torvalds int status = -EIO; 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds integ_len = p++; 13381da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13391da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13401da177e4SLinus Torvalds 13419f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13441da177e4SLinus Torvalds offset, snd_buf->len - offset)) 13451da177e4SLinus Torvalds return status; 13461da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 13491da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13501da177e4SLinus Torvalds iov = snd_buf->tail; 13511da177e4SLinus Torvalds else 13521da177e4SLinus Torvalds iov = snd_buf->head; 13531da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 13541da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 13551da177e4SLinus Torvalds 135600fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13571da177e4SLinus Torvalds status = -EIO; /* XXX? */ 13581da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1359fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13601da177e4SLinus Torvalds else if (maj_stat) 13611da177e4SLinus Torvalds return status; 13621da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 13651da177e4SLinus Torvalds iov->iov_len += offset; 13661da177e4SLinus Torvalds snd_buf->len += offset; 13671da177e4SLinus Torvalds return 0; 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds 13702d2da60cSJ. Bruce Fields static void 13712d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 13722d2da60cSJ. Bruce Fields { 13732d2da60cSJ. Bruce Fields int i; 13742d2da60cSJ. Bruce Fields 13752d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 13762d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 13772d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 13782d2da60cSJ. Bruce Fields } 13792d2da60cSJ. Bruce Fields 13802d2da60cSJ. Bruce Fields static int 13812d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 13822d2da60cSJ. Bruce Fields { 13832d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13842d2da60cSJ. Bruce Fields int first, last, i; 13852d2da60cSJ. Bruce Fields 13862d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 13872d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 13882d2da60cSJ. Bruce Fields return 0; 13892d2da60cSJ. Bruce Fields } 13902d2da60cSJ. Bruce Fields 13912d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 13922d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 13932d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 13942d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 13952d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 13962d2da60cSJ. Bruce Fields GFP_NOFS); 13972d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 13982d2da60cSJ. Bruce Fields goto out; 13992d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 14002d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 14012d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 14022d2da60cSJ. Bruce Fields goto out_free; 14032d2da60cSJ. Bruce Fields } 14042d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 14052d2da60cSJ. Bruce Fields return 0; 14062d2da60cSJ. Bruce Fields out_free: 1407cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1408cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 14092d2da60cSJ. Bruce Fields out: 14102d2da60cSJ. Bruce Fields return -EAGAIN; 14112d2da60cSJ. Bruce Fields } 14122d2da60cSJ. Bruce Fields 14132d2da60cSJ. Bruce Fields static inline int 14142d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14159f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14169f06c719SChuck Lever __be32 *p, void *obj) 14172d2da60cSJ. Bruce Fields { 14182d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14192d2da60cSJ. Bruce Fields u32 offset; 14202d2da60cSJ. Bruce Fields u32 maj_stat; 14212d2da60cSJ. Bruce Fields int status; 1422d8ed029dSAlexey Dobriyan __be32 *opaque_len; 14232d2da60cSJ. Bruce Fields struct page **inpages; 14242d2da60cSJ. Bruce Fields int first; 14252d2da60cSJ. Bruce Fields int pad; 14262d2da60cSJ. Bruce Fields struct kvec *iov; 14272d2da60cSJ. Bruce Fields char *tmp; 14282d2da60cSJ. Bruce Fields 14292d2da60cSJ. Bruce Fields opaque_len = p++; 14302d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14312d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14322d2da60cSJ. Bruce Fields 14339f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14342d2da60cSJ. Bruce Fields 14352d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 14362d2da60cSJ. Bruce Fields if (status) 14372d2da60cSJ. Bruce Fields return status; 14382d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14392d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 14402d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14412d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14427561042fSKevin Coffman /* 14437561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 14447561042fSKevin Coffman * head when wrapping: 14457561042fSKevin Coffman * 14467561042fSKevin Coffman * call_allocate() allocates twice the slack space required 14477561042fSKevin Coffman * by the authentication flavor to rq_callsize. 14487561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14497561042fSKevin Coffman */ 14502d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14512d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14522d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14532d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14542d2da60cSJ. Bruce Fields } 145500fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14567561042fSKevin Coffman /* slack space should prevent this ever happening: */ 14572d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 14582d2da60cSJ. Bruce Fields status = -EIO; 14592d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 14602d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 14612d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1462fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14632d2da60cSJ. Bruce Fields else if (maj_stat) 14642d2da60cSJ. Bruce Fields return status; 14652d2da60cSJ. Bruce Fields 14662d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 14672d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 14682d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 14692d2da60cSJ. Bruce Fields iov = snd_buf->tail; 14702d2da60cSJ. Bruce Fields else 14712d2da60cSJ. Bruce Fields iov = snd_buf->head; 14722d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 14732d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 14742d2da60cSJ. Bruce Fields memset(p, 0, pad); 14752d2da60cSJ. Bruce Fields iov->iov_len += pad; 14762d2da60cSJ. Bruce Fields snd_buf->len += pad; 14772d2da60cSJ. Bruce Fields 14782d2da60cSJ. Bruce Fields return 0; 14792d2da60cSJ. Bruce Fields } 14802d2da60cSJ. Bruce Fields 14811da177e4SLinus Torvalds static int 14821da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 14839f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 14841da177e4SLinus Torvalds { 1485a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 14861da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 14871da177e4SLinus Torvalds gc_base); 14881da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 14891da177e4SLinus Torvalds int status = -EIO; 14901da177e4SLinus Torvalds 1491632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 14921da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 14931da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 14941da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 14951da177e4SLinus Torvalds */ 14969f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14979f06c719SChuck Lever status = 0; 14981da177e4SLinus Torvalds goto out; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds switch (gss_cred->gc_service) { 15011da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 15029f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 15039f06c719SChuck Lever status = 0; 15041da177e4SLinus Torvalds break; 15051da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 150689f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 15071da177e4SLinus Torvalds break; 15081da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 150989f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 15101da177e4SLinus Torvalds break; 15111da177e4SLinus Torvalds } 15121da177e4SLinus Torvalds out: 15131da177e4SLinus Torvalds gss_put_ctx(ctx); 1514632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15151da177e4SLinus Torvalds return status; 15161da177e4SLinus Torvalds } 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds static inline int 15191da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1520d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15211da177e4SLinus Torvalds { 15221da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15231da177e4SLinus Torvalds struct xdr_buf integ_buf; 15241da177e4SLinus Torvalds struct xdr_netobj mic; 15251da177e4SLinus Torvalds u32 data_offset, mic_offset; 15261da177e4SLinus Torvalds u32 integ_len; 15271da177e4SLinus Torvalds u32 maj_stat; 15281da177e4SLinus Torvalds int status = -EIO; 15291da177e4SLinus Torvalds 15301da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 15311da177e4SLinus Torvalds if (integ_len & 3) 15321da177e4SLinus Torvalds return status; 15331da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15341da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 15351da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 15361da177e4SLinus Torvalds return status; 15371da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15381da177e4SLinus Torvalds return status; 15391da177e4SLinus Torvalds 15401da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15411da177e4SLinus Torvalds mic_offset - data_offset)) 15421da177e4SLinus Torvalds return status; 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15451da177e4SLinus Torvalds return status; 15461da177e4SLinus Torvalds 154700fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15481da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1549fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15501da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15511da177e4SLinus Torvalds return status; 15521da177e4SLinus Torvalds return 0; 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds 15552d2da60cSJ. Bruce Fields static inline int 15562d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1557d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15582d2da60cSJ. Bruce Fields { 15592d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15602d2da60cSJ. Bruce Fields u32 offset; 15612d2da60cSJ. Bruce Fields u32 opaque_len; 15622d2da60cSJ. Bruce Fields u32 maj_stat; 15632d2da60cSJ. Bruce Fields int status = -EIO; 15642d2da60cSJ. Bruce Fields 15652d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 15662d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15672d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 15682d2da60cSJ. Bruce Fields return status; 15692d2da60cSJ. Bruce Fields /* remove padding: */ 15702d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 15712d2da60cSJ. Bruce Fields 157200fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 15732d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1574fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15752d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 15762d2da60cSJ. Bruce Fields return status; 15772d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 15782d2da60cSJ. Bruce Fields return status; 15792d2da60cSJ. Bruce Fields 15802d2da60cSJ. Bruce Fields return 0; 15812d2da60cSJ. Bruce Fields } 15822d2da60cSJ. Bruce Fields 1583bf269551SChuck Lever static int 1584bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1585bf269551SChuck Lever __be32 *p, void *obj) 1586bf269551SChuck Lever { 1587bf269551SChuck Lever struct xdr_stream xdr; 1588bf269551SChuck Lever 1589bf269551SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1590bf269551SChuck Lever return decode(rqstp, &xdr, obj); 1591bf269551SChuck Lever } 15922d2da60cSJ. Bruce Fields 15931da177e4SLinus Torvalds static int 15941da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1595bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 15961da177e4SLinus Torvalds { 1597a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15981da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15991da177e4SLinus Torvalds gc_base); 16001da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1601d8ed029dSAlexey Dobriyan __be32 *savedp = p; 16022d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 16032d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 16041da177e4SLinus Torvalds int status = -EIO; 16051da177e4SLinus Torvalds 16061da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 16071da177e4SLinus Torvalds goto out_decode; 16081da177e4SLinus Torvalds switch (gss_cred->gc_service) { 16091da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 16101da177e4SLinus Torvalds break; 16111da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 16121da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 16131da177e4SLinus Torvalds if (status) 16141da177e4SLinus Torvalds goto out; 16151da177e4SLinus Torvalds break; 16161da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 16172d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 16182d2da60cSJ. Bruce Fields if (status) 16192d2da60cSJ. Bruce Fields goto out; 16201da177e4SLinus Torvalds break; 16211da177e4SLinus Torvalds } 162224b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16231be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16242d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 16251da177e4SLinus Torvalds out_decode: 1626bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16271da177e4SLinus Torvalds out: 16281da177e4SLinus Torvalds gss_put_ctx(ctx); 1629632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 1630632f0d05SChuck Lever task->tk_pid, __func__, status); 16311da177e4SLinus Torvalds return status; 16321da177e4SLinus Torvalds } 16331da177e4SLinus Torvalds 1634f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 16351da177e4SLinus Torvalds .owner = THIS_MODULE, 16361da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16371da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 16381da177e4SLinus Torvalds .create = gss_create, 16391da177e4SLinus Torvalds .destroy = gss_destroy, 16401da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 164180df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 164280df9d20SStanislav Kinsbursky .pipes_create = gss_pipes_dentries_create, 164380df9d20SStanislav Kinsbursky .pipes_destroy = gss_pipes_dentries_destroy, 16446a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16451da177e4SLinus Torvalds }; 16461da177e4SLinus Torvalds 1647f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 16481da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 16491da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1650fba3bad4STrond Myklebust .cr_init = gss_cred_init, 16515c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16521da177e4SLinus Torvalds .crmatch = gss_match, 16531da177e4SLinus Torvalds .crmarshal = gss_marshal, 16541da177e4SLinus Torvalds .crrefresh = gss_refresh, 16551da177e4SLinus Torvalds .crvalidate = gss_validate, 16561da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 16571da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 16581da177e4SLinus Torvalds }; 16591da177e4SLinus Torvalds 16600df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 16610df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 16626dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 16635c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 16640df7fb74STrond Myklebust .crmatch = gss_match, 16650df7fb74STrond Myklebust .crmarshal = gss_marshal, 16660df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 16670df7fb74STrond Myklebust .crvalidate = gss_validate, 16680df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 16690df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 16700df7fb74STrond Myklebust }; 16710df7fb74STrond Myklebust 1672b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1673c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 16741da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 16751da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 167634769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 167734769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 167834769fc4S\"J. Bruce Fields\ }; 167934769fc4S\"J. Bruce Fields\ 1680b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1681c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 168234769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 168334769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 168434769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 16851da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 16861da177e4SLinus Torvalds }; 16871da177e4SLinus Torvalds 1688a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 1689a1db410dSStanislav Kinsbursky { 1690a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 1691a1db410dSStanislav Kinsbursky } 1692a1db410dSStanislav Kinsbursky 1693a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 1694a1db410dSStanislav Kinsbursky { 1695a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 1696a1db410dSStanislav Kinsbursky } 1697a1db410dSStanislav Kinsbursky 1698a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 1699a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 1700a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1701a1db410dSStanislav Kinsbursky }; 1702a1db410dSStanislav Kinsbursky 17031da177e4SLinus Torvalds /* 17041da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 17051da177e4SLinus Torvalds */ 17061da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 17071da177e4SLinus Torvalds { 17081da177e4SLinus Torvalds int err = 0; 17091da177e4SLinus Torvalds 17101da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 17111da177e4SLinus Torvalds if (err) 17121da177e4SLinus Torvalds goto out; 17131da177e4SLinus Torvalds err = gss_svc_init(); 17141da177e4SLinus Torvalds if (err) 17151da177e4SLinus Torvalds goto out_unregister; 1716a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1717a1db410dSStanislav Kinsbursky if (err) 1718a1db410dSStanislav Kinsbursky goto out_svc_exit; 171979a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17201da177e4SLinus Torvalds return 0; 1721a1db410dSStanislav Kinsbursky out_svc_exit: 1722a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 17231da177e4SLinus Torvalds out_unregister: 17241da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 17251da177e4SLinus Torvalds out: 17261da177e4SLinus Torvalds return err; 17271da177e4SLinus Torvalds } 17281da177e4SLinus Torvalds 17291da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 17301da177e4SLinus Torvalds { 1731a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17321da177e4SLinus Torvalds gss_svc_shutdown(); 17331da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 1734bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17351da177e4SLinus Torvalds } 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1738126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 1739126e216aSTrond Myklebust gss_expired_cred_retry_delay, 1740126e216aSTrond Myklebust uint, 0644); 1741126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1742126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 1743126e216aSTrond Myklebust 17441da177e4SLinus Torvalds module_init(init_rpcsec_gss) 17451da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1746