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 601da177e4SLinus Torvalds #ifdef RPC_DEBUG 611da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 621da177e4SLinus Torvalds #endif 631da177e4SLinus Torvalds 64d25a03cfS\\\"J. Bruce Fields\\\ #define GSS_CRED_SLACK 1024 651da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 661da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 67adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds struct gss_auth { 700285ed1fSTrond Myklebust struct kref kref; 711da177e4SLinus Torvalds struct rpc_auth rpc_auth; 721da177e4SLinus Torvalds struct gss_api_mech *mech; 731da177e4SLinus Torvalds enum rpc_gss_svc service; 741da177e4SLinus Torvalds struct rpc_clnt *client; 751da177e4SLinus Torvalds struct dentry *dentry; 761da177e4SLinus Torvalds }; 771da177e4SLinus Torvalds 7879a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 7979a3f20bS\"J. Bruce Fields\ static int pipe_version = -1; 80cf81939dS\"J. Bruce Fields\ static atomic_t pipe_users = ATOMIC_INIT(0); 8179a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 8279a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 8379a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 84cf81939dS\"J. Bruce Fields\ 855d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 861da177e4SLinus Torvalds static struct rpc_pipe_ops gss_upcall_ops; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static inline struct gss_cl_ctx * 891da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds atomic_inc(&ctx->count); 921da177e4SLinus Torvalds return ctx; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds static inline void 961da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 971da177e4SLinus Torvalds { 981da177e4SLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 995d28dc82STrond Myklebust gss_free_ctx(ctx); 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 1025d28dc82STrond Myklebust /* gss_cred_set_ctx: 1035d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1045d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1055d28dc82STrond Myklebust * and a new one is protected by the inode->i_lock. 1065d28dc82STrond Myklebust */ 1071da177e4SLinus Torvalds static void 1081da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1115d28dc82STrond Myklebust 112cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 113cd019f75STrond Myklebust return; 1147b6962b0STrond Myklebust gss_get_ctx(ctx); 1155d28dc82STrond Myklebust rcu_assign_pointer(gss_cred->gc_ctx, ctx); 116fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 117cd019f75STrond Myklebust smp_mb__before_clear_bit(); 118fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static const void * 1221da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1251da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1261da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1271da177e4SLinus Torvalds memcpy(res, p, len); 1281da177e4SLinus Torvalds return q; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static inline const void * 1321da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds const void *q; 1351da177e4SLinus Torvalds unsigned int len; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1381da177e4SLinus Torvalds if (IS_ERR(p)) 1391da177e4SLinus Torvalds return p; 1401da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1411da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1421da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1430f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1441da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1451da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1461da177e4SLinus Torvalds dest->len = len; 1471da177e4SLinus Torvalds return q; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static struct gss_cl_ctx * 1511da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1541da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1551da177e4SLinus Torvalds 1565d28dc82STrond Myklebust rcu_read_lock(); 1571da177e4SLinus Torvalds if (gss_cred->gc_ctx) 1581da177e4SLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1595d28dc82STrond Myklebust rcu_read_unlock(); 1601da177e4SLinus Torvalds return ctx; 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds static struct gss_cl_ctx * 1641da177e4SLinus Torvalds gss_alloc_context(void) 1651da177e4SLinus Torvalds { 1661da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1671da177e4SLinus Torvalds 1680f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1691da177e4SLinus Torvalds if (ctx != NULL) { 1701da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1711da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1721da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1731da177e4SLinus Torvalds atomic_set(&ctx->count,1); 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds return ctx; 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1791da177e4SLinus Torvalds static const void * 1801da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds const void *q; 1831da177e4SLinus Torvalds unsigned int seclen; 1841da177e4SLinus Torvalds unsigned int timeout; 1851da177e4SLinus Torvalds u32 window_size; 1861da177e4SLinus Torvalds int ret; 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds /* First unsigned int gives the lifetime (in seconds) of the cred */ 1891da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 1901da177e4SLinus Torvalds if (IS_ERR(p)) 1911da177e4SLinus Torvalds goto err; 1921da177e4SLinus Torvalds if (timeout == 0) 1931da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 1941da177e4SLinus Torvalds ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; 1951da177e4SLinus Torvalds /* Sequence number window. Determines the maximum number of simultaneous requests */ 1961da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 1971da177e4SLinus Torvalds if (IS_ERR(p)) 1981da177e4SLinus Torvalds goto err; 1991da177e4SLinus Torvalds ctx->gc_win = window_size; 2001da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2011da177e4SLinus Torvalds if (ctx->gc_win == 0) { 2021da177e4SLinus Torvalds /* in which case, p points to an error code which we ignore */ 2031da177e4SLinus Torvalds p = ERR_PTR(-EACCES); 2041da177e4SLinus Torvalds goto err; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds /* copy the opaque wire context */ 2071da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2081da177e4SLinus Torvalds if (IS_ERR(p)) 2091da177e4SLinus Torvalds goto err; 2101da177e4SLinus Torvalds /* import the opaque security context */ 2111da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2121da177e4SLinus Torvalds if (IS_ERR(p)) 2131da177e4SLinus Torvalds goto err; 2141da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2151da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2161da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2171da177e4SLinus Torvalds goto err; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); 2201da177e4SLinus Torvalds if (ret < 0) { 2211da177e4SLinus Torvalds p = ERR_PTR(ret); 2221da177e4SLinus Torvalds goto err; 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds return q; 2251da177e4SLinus Torvalds err: 2261da177e4SLinus Torvalds dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); 2271da177e4SLinus Torvalds return p; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds struct gss_upcall_msg { 2321da177e4SLinus Torvalds atomic_t count; 2331da177e4SLinus Torvalds uid_t uid; 2341da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2351da177e4SLinus Torvalds struct list_head list; 2361da177e4SLinus Torvalds struct gss_auth *auth; 2371da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2381da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2391da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 2401da177e4SLinus Torvalds }; 2411da177e4SLinus Torvalds 24279a3f20bS\"J. Bruce Fields\ static int get_pipe_version(void) 24379a3f20bS\"J. Bruce Fields\ { 24479a3f20bS\"J. Bruce Fields\ int ret; 24579a3f20bS\"J. Bruce Fields\ 24679a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 24779a3f20bS\"J. Bruce Fields\ if (pipe_version >= 0) { 24879a3f20bS\"J. Bruce Fields\ atomic_inc(&pipe_users); 24979a3f20bS\"J. Bruce Fields\ ret = 0; 25079a3f20bS\"J. Bruce Fields\ } else 25179a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 25279a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 25379a3f20bS\"J. Bruce Fields\ return ret; 25479a3f20bS\"J. Bruce Fields\ } 25579a3f20bS\"J. Bruce Fields\ 25679a3f20bS\"J. Bruce Fields\ static void put_pipe_version(void) 25779a3f20bS\"J. Bruce Fields\ { 25879a3f20bS\"J. Bruce Fields\ if (atomic_dec_and_lock(&pipe_users, &pipe_version_lock)) { 25979a3f20bS\"J. Bruce Fields\ pipe_version = -1; 26079a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 26179a3f20bS\"J. Bruce Fields\ } 26279a3f20bS\"J. Bruce Fields\ } 26379a3f20bS\"J. Bruce Fields\ 2641da177e4SLinus Torvalds static void 2651da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2681da177e4SLinus Torvalds return; 26979a3f20bS\"J. Bruce Fields\ put_pipe_version(); 2701da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 2711da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 2721da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 273f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 2741da177e4SLinus Torvalds kfree(gss_msg); 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds static struct gss_upcall_msg * 2786e84c7b6STrond Myklebust __gss_find_upcall(struct rpc_inode *rpci, uid_t uid) 2791da177e4SLinus Torvalds { 2801da177e4SLinus Torvalds struct gss_upcall_msg *pos; 2816e84c7b6STrond Myklebust list_for_each_entry(pos, &rpci->in_downcall, list) { 2821da177e4SLinus Torvalds if (pos->uid != uid) 2831da177e4SLinus Torvalds continue; 2841da177e4SLinus Torvalds atomic_inc(&pos->count); 2851da177e4SLinus Torvalds dprintk("RPC: gss_find_upcall found msg %p\n", pos); 2861da177e4SLinus Torvalds return pos; 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds dprintk("RPC: gss_find_upcall found nothing\n"); 2891da177e4SLinus Torvalds return NULL; 2901da177e4SLinus Torvalds } 2911da177e4SLinus Torvalds 292720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 2931da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 2941da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 2951da177e4SLinus Torvalds */ 2961da177e4SLinus Torvalds static inline struct gss_upcall_msg * 2971da177e4SLinus Torvalds gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) 2981da177e4SLinus Torvalds { 299b185f835STrond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 3006e84c7b6STrond Myklebust struct rpc_inode *rpci = RPC_I(inode); 3011da177e4SLinus Torvalds struct gss_upcall_msg *old; 3021da177e4SLinus Torvalds 303b185f835STrond Myklebust spin_lock(&inode->i_lock); 3046e84c7b6STrond Myklebust old = __gss_find_upcall(rpci, gss_msg->uid); 3051da177e4SLinus Torvalds if (old == NULL) { 3061da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 3076e84c7b6STrond Myklebust list_add(&gss_msg->list, &rpci->in_downcall); 3081da177e4SLinus Torvalds } else 3091da177e4SLinus Torvalds gss_msg = old; 310b185f835STrond Myklebust spin_unlock(&inode->i_lock); 3111da177e4SLinus Torvalds return gss_msg; 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static void 3151da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3181da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3191da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3201da177e4SLinus Torvalds atomic_dec(&gss_msg->count); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds static void 3241da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3251da177e4SLinus Torvalds { 3261da177e4SLinus Torvalds struct gss_auth *gss_auth = gss_msg->auth; 327b185f835STrond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 3281da177e4SLinus Torvalds 3293b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3303b68aaeaSTrond Myklebust return; 331b185f835STrond Myklebust spin_lock(&inode->i_lock); 3323b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3331da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 334b185f835STrond Myklebust spin_unlock(&inode->i_lock); 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds static void 3381da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 3391da177e4SLinus Torvalds { 3401da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, 3411da177e4SLinus Torvalds struct gss_cred, gc_base); 3421da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 343b185f835STrond Myklebust struct inode *inode = gss_msg->auth->dentry->d_inode; 3441da177e4SLinus Torvalds 3455d28dc82STrond Myklebust spin_lock(&inode->i_lock); 3461da177e4SLinus Torvalds if (gss_msg->ctx) 3477b6962b0STrond Myklebust gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx); 3481da177e4SLinus Torvalds else 3491da177e4SLinus Torvalds task->tk_status = gss_msg->msg.errno; 3501da177e4SLinus Torvalds gss_cred->gc_upcall = NULL; 3511da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 352b185f835STrond Myklebust spin_unlock(&inode->i_lock); 3531da177e4SLinus Torvalds gss_release_msg(gss_msg); 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds static inline struct gss_upcall_msg * 3571da177e4SLinus Torvalds gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) 3581da177e4SLinus Torvalds { 3591da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 36079a3f20bS\"J. Bruce Fields\ int vers; 3611da177e4SLinus Torvalds 3620f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 363db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 364db75b3d6S\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 36579a3f20bS\"J. Bruce Fields\ vers = get_pipe_version(); 36679a3f20bS\"J. Bruce Fields\ if (vers < 0) { 36779a3f20bS\"J. Bruce Fields\ kfree(gss_msg); 36879a3f20bS\"J. Bruce Fields\ return ERR_PTR(vers); 36979a3f20bS\"J. Bruce Fields\ } 3701da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 3711da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 3721da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 3731da177e4SLinus Torvalds atomic_set(&gss_msg->count, 1); 3741da177e4SLinus Torvalds gss_msg->msg.data = &gss_msg->uid; 3751da177e4SLinus Torvalds gss_msg->msg.len = sizeof(gss_msg->uid); 3761da177e4SLinus Torvalds gss_msg->uid = uid; 3771da177e4SLinus Torvalds gss_msg->auth = gss_auth; 3781da177e4SLinus Torvalds return gss_msg; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds static struct gss_upcall_msg * 3821da177e4SLinus Torvalds gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 3831da177e4SLinus Torvalds { 3847c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 3857c67db3aSTrond Myklebust struct gss_cred, gc_base); 3861da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 3877c67db3aSTrond Myklebust uid_t uid = cred->cr_uid; 3881da177e4SLinus Torvalds 3897c67db3aSTrond Myklebust /* Special case: rpc.gssd assumes that uid == 0 implies machine creds */ 3907c67db3aSTrond Myklebust if (gss_cred->gc_machine_cred != 0) 3917c67db3aSTrond Myklebust uid = 0; 3927c67db3aSTrond Myklebust 3937c67db3aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid); 394db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 395db75b3d6S\"J. Bruce Fields\ return gss_new; 3961da177e4SLinus Torvalds gss_msg = gss_add_msg(gss_auth, gss_new); 3971da177e4SLinus Torvalds if (gss_msg == gss_new) { 3981da177e4SLinus Torvalds int res = rpc_queue_upcall(gss_auth->dentry->d_inode, &gss_new->msg); 3991da177e4SLinus Torvalds if (res) { 4001da177e4SLinus Torvalds gss_unhash_msg(gss_new); 4011da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds } else 4041da177e4SLinus Torvalds gss_release_msg(gss_new); 4051da177e4SLinus Torvalds return gss_msg; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds 408b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 409b03568c3S\"J. Bruce Fields\ { 410b03568c3S\"J. Bruce Fields\ static unsigned long ratelimit; 411b03568c3S\"J. Bruce Fields\ unsigned long now = jiffies; 412b03568c3S\"J. Bruce Fields\ 413b03568c3S\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 414b03568c3S\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 415b03568c3S\"J. Bruce Fields\ "Please check user daemon is running.\n"); 416b03568c3S\"J. Bruce Fields\ ratelimit = now + 15*HZ; 417b03568c3S\"J. Bruce Fields\ } 418b03568c3S\"J. Bruce Fields\ } 419b03568c3S\"J. Bruce Fields\ 4201da177e4SLinus Torvalds static inline int 4211da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 4221da177e4SLinus Torvalds { 4231da177e4SLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 4244a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 4251da177e4SLinus Torvalds struct gss_auth, rpc_auth); 4261da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 4271da177e4SLinus Torvalds struct gss_cred, gc_base); 4281da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 429b185f835STrond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 4301da177e4SLinus Torvalds int err = 0; 4311da177e4SLinus Torvalds 4328885cb36SChuck Lever dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid, 4338885cb36SChuck Lever cred->cr_uid); 4341da177e4SLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 43579a3f20bS\"J. Bruce Fields\ if (IS_ERR(gss_msg) == -EAGAIN) { 43679a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 43779a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 43879a3f20bS\"J. Bruce Fields\ warn_gssd(); 43979a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 44079a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 44179a3f20bS\"J. Bruce Fields\ return 0; 44279a3f20bS\"J. Bruce Fields\ } 4431da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 4441da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 4451da177e4SLinus Torvalds goto out; 4461da177e4SLinus Torvalds } 447b185f835STrond Myklebust spin_lock(&inode->i_lock); 4481da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 4495d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 4507b6962b0STrond Myklebust else if (gss_msg->ctx != NULL) { 4517b6962b0STrond Myklebust gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx); 4527b6962b0STrond Myklebust gss_cred->gc_upcall = NULL; 4537b6962b0STrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 4547b6962b0STrond Myklebust } else if (gss_msg->msg.errno >= 0) { 4551da177e4SLinus Torvalds task->tk_timeout = 0; 4561da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 4571da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 4581da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 4595d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 4601da177e4SLinus Torvalds } else 4611da177e4SLinus Torvalds err = gss_msg->msg.errno; 462b185f835STrond Myklebust spin_unlock(&inode->i_lock); 4631da177e4SLinus Torvalds gss_release_msg(gss_msg); 4641da177e4SLinus Torvalds out: 4658885cb36SChuck Lever dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n", 4668885cb36SChuck Lever task->tk_pid, cred->cr_uid, err); 4671da177e4SLinus Torvalds return err; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds static inline int 4711da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 4721da177e4SLinus Torvalds { 473b185f835STrond Myklebust struct inode *inode = gss_auth->dentry->d_inode; 4741da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 4751da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 4761da177e4SLinus Torvalds DEFINE_WAIT(wait); 4771da177e4SLinus Torvalds int err = 0; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); 48079a3f20bS\"J. Bruce Fields\ retry: 4811da177e4SLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 48279a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 48379a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 48479a3f20bS\"J. Bruce Fields\ pipe_version >= 0, 15*HZ); 48579a3f20bS\"J. Bruce Fields\ if (err) 48679a3f20bS\"J. Bruce Fields\ goto out; 48779a3f20bS\"J. Bruce Fields\ if (pipe_version < 0) 48879a3f20bS\"J. Bruce Fields\ warn_gssd(); 48979a3f20bS\"J. Bruce Fields\ goto retry; 49079a3f20bS\"J. Bruce Fields\ } 4911da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 4921da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 4931da177e4SLinus Torvalds goto out; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds for (;;) { 4961da177e4SLinus Torvalds prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); 497b185f835STrond Myklebust spin_lock(&inode->i_lock); 4981da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 4991da177e4SLinus Torvalds break; 5001da177e4SLinus Torvalds } 501b185f835STrond Myklebust spin_unlock(&inode->i_lock); 5021da177e4SLinus Torvalds if (signalled()) { 5031da177e4SLinus Torvalds err = -ERESTARTSYS; 5041da177e4SLinus Torvalds goto out_intr; 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds schedule(); 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds if (gss_msg->ctx) 5097b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 5101da177e4SLinus Torvalds else 5111da177e4SLinus Torvalds err = gss_msg->msg.errno; 5125d28dc82STrond Myklebust spin_unlock(&inode->i_lock); 5131da177e4SLinus Torvalds out_intr: 5141da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 5151da177e4SLinus Torvalds gss_release_msg(gss_msg); 5161da177e4SLinus Torvalds out: 5178885cb36SChuck Lever dprintk("RPC: gss_create_upcall for uid %u result %d\n", 5188885cb36SChuck Lever cred->cr_uid, err); 5191da177e4SLinus Torvalds return err; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds static ssize_t 5231da177e4SLinus Torvalds gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, 5241da177e4SLinus Torvalds char __user *dst, size_t buflen) 5251da177e4SLinus Torvalds { 5261da177e4SLinus Torvalds char *data = (char *)msg->data + msg->copied; 5277df08995SChuck Lever size_t mlen = min(msg->len, buflen); 5287df08995SChuck Lever unsigned long left; 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds left = copy_to_user(dst, data, mlen); 5317df08995SChuck Lever if (left == mlen) { 5327df08995SChuck Lever msg->errno = -EFAULT; 5337df08995SChuck Lever return -EFAULT; 5341da177e4SLinus Torvalds } 5357df08995SChuck Lever 5361da177e4SLinus Torvalds mlen -= left; 5371da177e4SLinus Torvalds msg->copied += mlen; 5381da177e4SLinus Torvalds msg->errno = 0; 5391da177e4SLinus Torvalds return mlen; 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds static ssize_t 5451da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds const void *p, *end; 5481da177e4SLinus Torvalds void *buf; 5491da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 550b185f835STrond Myklebust struct inode *inode = filp->f_path.dentry->d_inode; 5511da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 5521da177e4SLinus Torvalds uid_t uid; 5533b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 5561da177e4SLinus Torvalds goto out; 5571da177e4SLinus Torvalds err = -ENOMEM; 5580f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 5591da177e4SLinus Torvalds if (!buf) 5601da177e4SLinus Torvalds goto out; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds err = -EFAULT; 5631da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 5641da177e4SLinus Torvalds goto err; 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 5671da177e4SLinus Torvalds p = simple_get_bytes(buf, end, &uid, sizeof(uid)); 5681da177e4SLinus Torvalds if (IS_ERR(p)) { 5691da177e4SLinus Torvalds err = PTR_ERR(p); 5701da177e4SLinus Torvalds goto err; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds err = -ENOMEM; 5741da177e4SLinus Torvalds ctx = gss_alloc_context(); 5751da177e4SLinus Torvalds if (ctx == NULL) 5761da177e4SLinus Torvalds goto err; 5773b68aaeaSTrond Myklebust 5783b68aaeaSTrond Myklebust err = -ENOENT; 5793b68aaeaSTrond Myklebust /* Find a matching upcall */ 5803b68aaeaSTrond Myklebust spin_lock(&inode->i_lock); 5816e84c7b6STrond Myklebust gss_msg = __gss_find_upcall(RPC_I(inode), uid); 5823b68aaeaSTrond Myklebust if (gss_msg == NULL) { 5833b68aaeaSTrond Myklebust spin_unlock(&inode->i_lock); 5843b68aaeaSTrond Myklebust goto err_put_ctx; 5853b68aaeaSTrond Myklebust } 5863b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 5873b68aaeaSTrond Myklebust spin_unlock(&inode->i_lock); 5883b68aaeaSTrond Myklebust 5896e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 5901da177e4SLinus Torvalds if (IS_ERR(p)) { 5911da177e4SLinus Torvalds err = PTR_ERR(p); 592ffc40f56SKevin Coffman gss_msg->msg.errno = (err == -EAGAIN) ? -EAGAIN : -EACCES; 5933b68aaeaSTrond Myklebust goto err_release_msg; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 5963b68aaeaSTrond Myklebust err = mlen; 5973b68aaeaSTrond Myklebust 5983b68aaeaSTrond Myklebust err_release_msg: 5993b68aaeaSTrond Myklebust spin_lock(&inode->i_lock); 6001da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 601b185f835STrond Myklebust spin_unlock(&inode->i_lock); 6021da177e4SLinus Torvalds gss_release_msg(gss_msg); 6031da177e4SLinus Torvalds err_put_ctx: 6041da177e4SLinus Torvalds gss_put_ctx(ctx); 6051da177e4SLinus Torvalds err: 6061da177e4SLinus Torvalds kfree(buf); 6071da177e4SLinus Torvalds out: 6083b68aaeaSTrond Myklebust dprintk("RPC: gss_pipe_downcall returning %Zd\n", err); 6091da177e4SLinus Torvalds return err; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 612cf81939dS\"J. Bruce Fields\ static int 613cf81939dS\"J. Bruce Fields\ gss_pipe_open(struct inode *inode) 614cf81939dS\"J. Bruce Fields\ { 61579a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 61679a3f20bS\"J. Bruce Fields\ if (pipe_version < 0) { 61779a3f20bS\"J. Bruce Fields\ pipe_version = 0; 61879a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 61979a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 62079a3f20bS\"J. Bruce Fields\ } 621cf81939dS\"J. Bruce Fields\ atomic_inc(&pipe_users); 62279a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 623cf81939dS\"J. Bruce Fields\ return 0; 624cf81939dS\"J. Bruce Fields\ } 625cf81939dS\"J. Bruce Fields\ 6261da177e4SLinus Torvalds static void 6271da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 6281da177e4SLinus Torvalds { 6291da177e4SLinus Torvalds struct rpc_inode *rpci = RPC_I(inode); 6301da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6311da177e4SLinus Torvalds 6326e84c7b6STrond Myklebust spin_lock(&inode->i_lock); 6336e84c7b6STrond Myklebust while (!list_empty(&rpci->in_downcall)) { 6346e84c7b6STrond Myklebust 6356e84c7b6STrond Myklebust gss_msg = list_entry(rpci->in_downcall.next, 6361da177e4SLinus Torvalds struct gss_upcall_msg, list); 6371da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 6381da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 6391da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 640b185f835STrond Myklebust spin_unlock(&inode->i_lock); 6411da177e4SLinus Torvalds gss_release_msg(gss_msg); 642b185f835STrond Myklebust spin_lock(&inode->i_lock); 6431da177e4SLinus Torvalds } 644b185f835STrond Myklebust spin_unlock(&inode->i_lock); 645cf81939dS\"J. Bruce Fields\ 64679a3f20bS\"J. Bruce Fields\ put_pipe_version(); 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds static void 6501da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 6511da177e4SLinus Torvalds { 6521da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds if (msg->errno < 0) { 6551da177e4SLinus Torvalds dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", 6561da177e4SLinus Torvalds gss_msg); 6571da177e4SLinus Torvalds atomic_inc(&gss_msg->count); 6581da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 659b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 660b03568c3S\"J. Bruce Fields\ warn_gssd(); 6611da177e4SLinus Torvalds gss_release_msg(gss_msg); 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds /* 6661da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 6671da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 6681da177e4SLinus Torvalds */ 6691da177e4SLinus Torvalds static struct rpc_auth * 6701da177e4SLinus Torvalds gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds struct gss_auth *gss_auth; 6731da177e4SLinus Torvalds struct rpc_auth * auth; 6746a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 6796a19275aSJ. Bruce Fields return ERR_PTR(err); 6801da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 6811da177e4SLinus Torvalds goto out_dec; 6821da177e4SLinus Torvalds gss_auth->client = clnt; 6836a19275aSJ. Bruce Fields err = -EINVAL; 6841da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 6851da177e4SLinus Torvalds if (!gss_auth->mech) { 6863392c349SJames Morris printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n", 6870dc47877SHarvey Harrison __func__, flavor); 6881da177e4SLinus Torvalds goto err_free; 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 691438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 692438b6fdeSJ. Bruce Fields goto err_put_mech; 6931da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 6941da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 6951da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 6961da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 6971da177e4SLinus Torvalds auth->au_flavor = flavor; 6981da177e4SLinus Torvalds atomic_set(&auth->au_count, 1); 6990285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 7001da177e4SLinus Torvalds 701158998b6STrond Myklebust gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, 702158998b6STrond Myklebust clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 7036a19275aSJ. Bruce Fields if (IS_ERR(gss_auth->dentry)) { 7046a19275aSJ. Bruce Fields err = PTR_ERR(gss_auth->dentry); 7051da177e4SLinus Torvalds goto err_put_mech; 7066a19275aSJ. Bruce Fields } 7071da177e4SLinus Torvalds 708f5c2187cSTrond Myklebust err = rpcauth_init_credcache(auth); 70907a2bf1dSTrond Myklebust if (err) 71007a2bf1dSTrond Myklebust goto err_unlink_pipe; 71107a2bf1dSTrond Myklebust 7121da177e4SLinus Torvalds return auth; 71307a2bf1dSTrond Myklebust err_unlink_pipe: 71407a2bf1dSTrond Myklebust rpc_unlink(gss_auth->dentry); 7151da177e4SLinus Torvalds err_put_mech: 7161da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 7171da177e4SLinus Torvalds err_free: 7181da177e4SLinus Torvalds kfree(gss_auth); 7191da177e4SLinus Torvalds out_dec: 7201da177e4SLinus Torvalds module_put(THIS_MODULE); 7216a19275aSJ. Bruce Fields return ERR_PTR(err); 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds static void 7250285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 7260285ed1fSTrond Myklebust { 7270285ed1fSTrond Myklebust rpc_unlink(gss_auth->dentry); 7280285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 7290285ed1fSTrond Myklebust 7300285ed1fSTrond Myklebust kfree(gss_auth); 7310285ed1fSTrond Myklebust module_put(THIS_MODULE); 7320285ed1fSTrond Myklebust } 7330285ed1fSTrond Myklebust 7340285ed1fSTrond Myklebust static void 7350285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 7360285ed1fSTrond Myklebust { 7370285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 7380285ed1fSTrond Myklebust 7390285ed1fSTrond Myklebust gss_free(gss_auth); 7400285ed1fSTrond Myklebust } 7410285ed1fSTrond Myklebust 7420285ed1fSTrond Myklebust static void 7431da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 7441da177e4SLinus Torvalds { 7451da177e4SLinus Torvalds struct gss_auth *gss_auth; 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 7481da177e4SLinus Torvalds auth, auth->au_flavor); 7491da177e4SLinus Torvalds 7503ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 7513ab9bb72STrond Myklebust 7521da177e4SLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 7530285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7560df7fb74STrond Myklebust /* 7570df7fb74STrond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 7580df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 7590df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 7600df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 7610df7fb74STrond Myklebust */ 7620df7fb74STrond Myklebust static int 7630df7fb74STrond Myklebust gss_destroying_context(struct rpc_cred *cred) 7640df7fb74STrond Myklebust { 7650df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 7660df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 7670df7fb74STrond Myklebust struct rpc_task *task; 7680df7fb74STrond Myklebust 7690df7fb74STrond Myklebust if (gss_cred->gc_ctx == NULL || 7706dcd3926SJeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 7710df7fb74STrond Myklebust return 0; 7720df7fb74STrond Myklebust 7730df7fb74STrond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 7740df7fb74STrond Myklebust cred->cr_ops = &gss_nullops; 7750df7fb74STrond Myklebust 7760df7fb74STrond Myklebust /* Take a reference to ensure the cred will be destroyed either 7770df7fb74STrond Myklebust * by the RPC call or by the put_rpccred() below */ 7780df7fb74STrond Myklebust get_rpccred(cred); 7790df7fb74STrond Myklebust 780080a1f14STrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 7810df7fb74STrond Myklebust if (!IS_ERR(task)) 7820df7fb74STrond Myklebust rpc_put_task(task); 7830df7fb74STrond Myklebust 7840df7fb74STrond Myklebust put_rpccred(cred); 7850df7fb74STrond Myklebust return 1; 7860df7fb74STrond Myklebust } 7870df7fb74STrond Myklebust 7880df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 7891da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 7901da177e4SLinus Torvalds * allocated before freeing them. */ 7911da177e4SLinus Torvalds static void 7925d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 7931da177e4SLinus Torvalds { 7945d28dc82STrond Myklebust dprintk("RPC: gss_free_ctx\n"); 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 7971da177e4SLinus Torvalds kfree(ctx); 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds static void 8015d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 8025d28dc82STrond Myklebust { 8035d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 8045d28dc82STrond Myklebust gss_do_free_ctx(ctx); 8055d28dc82STrond Myklebust } 8065d28dc82STrond Myklebust 8075d28dc82STrond Myklebust static void 8085d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 8095d28dc82STrond Myklebust { 810a4deb81bSTrond Myklebust struct gss_ctx *gc_gss_ctx; 811a4deb81bSTrond Myklebust 812a4deb81bSTrond Myklebust gc_gss_ctx = rcu_dereference(ctx->gc_gss_ctx); 813a4deb81bSTrond Myklebust rcu_assign_pointer(ctx->gc_gss_ctx, NULL); 8145d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 815a4deb81bSTrond Myklebust if (gc_gss_ctx) 816a4deb81bSTrond Myklebust gss_delete_sec_context(&gc_gss_ctx); 8175d28dc82STrond Myklebust } 8185d28dc82STrond Myklebust 8195d28dc82STrond Myklebust static void 82031be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 8211da177e4SLinus Torvalds { 82231be5bf1STrond Myklebust dprintk("RPC: gss_free_cred %p\n", gss_cred); 82331be5bf1STrond Myklebust kfree(gss_cred); 82431be5bf1STrond Myklebust } 8251da177e4SLinus Torvalds 82631be5bf1STrond Myklebust static void 82731be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 82831be5bf1STrond Myklebust { 82931be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 83031be5bf1STrond Myklebust gss_free_cred(gss_cred); 83131be5bf1STrond Myklebust } 8321da177e4SLinus Torvalds 83331be5bf1STrond Myklebust static void 8346dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 83531be5bf1STrond Myklebust { 8365d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 8370285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 8385d28dc82STrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 8395d28dc82STrond Myklebust 8405d28dc82STrond Myklebust rcu_assign_pointer(gss_cred->gc_ctx, NULL); 84131be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 8425d28dc82STrond Myklebust if (ctx) 8435d28dc82STrond Myklebust gss_put_ctx(ctx); 8440285ed1fSTrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8476dcd3926SJeff Layton static void 8486dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 8496dcd3926SJeff Layton { 8506dcd3926SJeff Layton 8516dcd3926SJeff Layton if (gss_destroying_context(cred)) 8526dcd3926SJeff Layton return; 8536dcd3926SJeff Layton gss_destroy_nullcred(cred); 8546dcd3926SJeff Layton } 8556dcd3926SJeff Layton 8561da177e4SLinus Torvalds /* 8571da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 8581da177e4SLinus Torvalds */ 8591da177e4SLinus Torvalds static struct rpc_cred * 8608a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 8611da177e4SLinus Torvalds { 8628a317760STrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds static struct rpc_cred * 8668a317760STrond Myklebust gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 8671da177e4SLinus Torvalds { 8681da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 8691da177e4SLinus Torvalds struct gss_cred *cred = NULL; 8701da177e4SLinus Torvalds int err = -ENOMEM; 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", 8731da177e4SLinus Torvalds acred->uid, auth->au_flavor); 8741da177e4SLinus Torvalds 8750f38b873STrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 8761da177e4SLinus Torvalds goto out_err; 8771da177e4SLinus Torvalds 8785fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 8791da177e4SLinus Torvalds /* 8801da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 8811da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 8821da177e4SLinus Torvalds */ 883fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 8841da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 8857c67db3aSTrond Myklebust cred->gc_machine_cred = acred->machine_cred; 8860285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 8871da177e4SLinus Torvalds return &cred->gc_base; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds out_err: 8901da177e4SLinus Torvalds dprintk("RPC: gss_create_cred failed with error %d\n", err); 8911da177e4SLinus Torvalds return ERR_PTR(err); 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds static int 895fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 896fba3bad4STrond Myklebust { 897fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 898fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 899fba3bad4STrond Myklebust int err; 900fba3bad4STrond Myklebust 901fba3bad4STrond Myklebust do { 902fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 903fba3bad4STrond Myklebust } while (err == -EAGAIN); 904fba3bad4STrond Myklebust return err; 905fba3bad4STrond Myklebust } 906fba3bad4STrond Myklebust 907fba3bad4STrond Myklebust static int 9088a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 9091da177e4SLinus Torvalds { 9101da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 9111da177e4SLinus Torvalds 912cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 9138a317760STrond Myklebust goto out; 9141da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 915cd019f75STrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 916cd019f75STrond Myklebust return 0; 917cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 9181da177e4SLinus Torvalds return 0; 9198a317760STrond Myklebust out: 9207c67db3aSTrond Myklebust if (acred->machine_cred != gss_cred->gc_machine_cred) 9217c67db3aSTrond Myklebust return 0; 9221da177e4SLinus Torvalds return (rc->cr_uid == acred->uid); 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds /* 9261da177e4SLinus Torvalds * Marshal credentials. 9271da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 9281da177e4SLinus Torvalds */ 929d8ed029dSAlexey Dobriyan static __be32 * 930d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 9311da177e4SLinus Torvalds { 9321da177e4SLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 9331da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 9341da177e4SLinus Torvalds gc_base); 9351da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 936d8ed029dSAlexey Dobriyan __be32 *cred_len; 9371da177e4SLinus Torvalds struct rpc_rqst *req = task->tk_rqstp; 9381da177e4SLinus Torvalds u32 maj_stat = 0; 9391da177e4SLinus Torvalds struct xdr_netobj mic; 9401da177e4SLinus Torvalds struct kvec iov; 9411da177e4SLinus Torvalds struct xdr_buf verf_buf; 9421da177e4SLinus Torvalds 9438885cb36SChuck Lever dprintk("RPC: %5u gss_marshal\n", task->tk_pid); 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 9461da177e4SLinus Torvalds cred_len = p++; 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 9491da177e4SLinus Torvalds req->rq_seqno = ctx->gc_seq++; 9501da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 9531da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 9541da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 9551da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 9561da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 9571da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 9601da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 961808012fbSChuck Lever iov.iov_base = xprt_skip_transport_header(task->tk_xprt, 962808012fbSChuck Lever req->rq_snd_buf.head[0].iov_base); 9631da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 9641da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds /* set verifier flavor*/ 9671da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 97000fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 9711da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 972fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 9731da177e4SLinus Torvalds } else if (maj_stat != 0) { 9741da177e4SLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 9751da177e4SLinus Torvalds goto out_put_ctx; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 9781da177e4SLinus Torvalds gss_put_ctx(ctx); 9791da177e4SLinus Torvalds return p; 9801da177e4SLinus Torvalds out_put_ctx: 9811da177e4SLinus Torvalds gss_put_ctx(ctx); 9821da177e4SLinus Torvalds return NULL; 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds 985cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 986cd019f75STrond Myklebust { 987cd019f75STrond Myklebust struct rpc_cred *oldcred = task->tk_msg.rpc_cred; 988cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 989cd019f75STrond Myklebust struct gss_cred, 990cd019f75STrond Myklebust gc_base); 991cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 992cd019f75STrond Myklebust struct auth_cred acred = { 993cd019f75STrond Myklebust .uid = oldcred->cr_uid, 994cd019f75STrond Myklebust .machine_cred = gss_cred->gc_machine_cred, 995cd019f75STrond Myklebust }; 996cd019f75STrond Myklebust struct rpc_cred *new; 997cd019f75STrond Myklebust 998cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 999cd019f75STrond Myklebust if (IS_ERR(new)) 1000cd019f75STrond Myklebust return PTR_ERR(new); 1001cd019f75STrond Myklebust task->tk_msg.rpc_cred = new; 1002cd019f75STrond Myklebust put_rpccred(oldcred); 1003cd019f75STrond Myklebust return 0; 1004cd019f75STrond Myklebust } 1005cd019f75STrond Myklebust 10061da177e4SLinus Torvalds /* 10071da177e4SLinus Torvalds * Refresh credentials. XXX - finish 10081da177e4SLinus Torvalds */ 10091da177e4SLinus Torvalds static int 10101da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 10111da177e4SLinus Torvalds { 1012cd019f75STrond Myklebust struct rpc_cred *cred = task->tk_msg.rpc_cred; 1013cd019f75STrond Myklebust int ret = 0; 10141da177e4SLinus Torvalds 1015cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1016cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1017cd019f75STrond Myklebust ret = gss_renew_cred(task); 1018cd019f75STrond Myklebust if (ret < 0) 1019cd019f75STrond Myklebust goto out; 1020cd019f75STrond Myklebust cred = task->tk_msg.rpc_cred; 1021cd019f75STrond Myklebust } 1022cd019f75STrond Myklebust 1023cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1024cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1025cd019f75STrond Myklebust out: 1026cd019f75STrond Myklebust return ret; 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds 10290df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 10300df7fb74STrond Myklebust static int 10310df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 10320df7fb74STrond Myklebust { 10330df7fb74STrond Myklebust return -EACCES; 10340df7fb74STrond Myklebust } 10350df7fb74STrond Myklebust 1036d8ed029dSAlexey Dobriyan static __be32 * 1037d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 10381da177e4SLinus Torvalds { 10391da177e4SLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 10401da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1041d8ed029dSAlexey Dobriyan __be32 seq; 10421da177e4SLinus Torvalds struct kvec iov; 10431da177e4SLinus Torvalds struct xdr_buf verf_buf; 10441da177e4SLinus Torvalds struct xdr_netobj mic; 10451da177e4SLinus Torvalds u32 flav,len; 10461da177e4SLinus Torvalds u32 maj_stat; 10471da177e4SLinus Torvalds 10488885cb36SChuck Lever dprintk("RPC: %5u gss_validate\n", task->tk_pid); 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds flav = ntohl(*p++); 10511da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 10521da177e4SLinus Torvalds goto out_bad; 10531da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 10541da177e4SLinus Torvalds goto out_bad; 10551da177e4SLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 10561da177e4SLinus Torvalds iov.iov_base = &seq; 10571da177e4SLinus Torvalds iov.iov_len = sizeof(seq); 10581da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 10591da177e4SLinus Torvalds mic.data = (u8 *)p; 10601da177e4SLinus Torvalds mic.len = len; 10611da177e4SLinus Torvalds 106200fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 10631da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1064fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 10650df7fb74STrond Myklebust if (maj_stat) { 10660df7fb74STrond Myklebust dprintk("RPC: %5u gss_validate: gss_verify_mic returned " 10670df7fb74STrond Myklebust "error 0x%08x\n", task->tk_pid, maj_stat); 10681da177e4SLinus Torvalds goto out_bad; 10690df7fb74STrond Myklebust } 107024b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 107124b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 10721be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 10731da177e4SLinus Torvalds gss_put_ctx(ctx); 10748885cb36SChuck Lever dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n", 10751da177e4SLinus Torvalds task->tk_pid); 10761da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 10771da177e4SLinus Torvalds out_bad: 10781da177e4SLinus Torvalds gss_put_ctx(ctx); 10798885cb36SChuck Lever dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid); 10801da177e4SLinus Torvalds return NULL; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static inline int 10841da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1085d8ed029dSAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 10861da177e4SLinus Torvalds { 10871da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 10881da177e4SLinus Torvalds struct xdr_buf integ_buf; 1089d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 10901da177e4SLinus Torvalds struct xdr_netobj mic; 1091d8ed029dSAlexey Dobriyan u32 offset; 1092d8ed029dSAlexey Dobriyan __be32 *q; 10931da177e4SLinus Torvalds struct kvec *iov; 10941da177e4SLinus Torvalds u32 maj_stat = 0; 10951da177e4SLinus Torvalds int status = -EIO; 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds integ_len = p++; 10981da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 10991da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 11001da177e4SLinus Torvalds 110188a9fe8cSTrond Myklebust status = encode(rqstp, p, obj); 11021da177e4SLinus Torvalds if (status) 11031da177e4SLinus Torvalds return status; 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 11061da177e4SLinus Torvalds offset, snd_buf->len - offset)) 11071da177e4SLinus Torvalds return status; 11081da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 11111da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 11121da177e4SLinus Torvalds iov = snd_buf->tail; 11131da177e4SLinus Torvalds else 11141da177e4SLinus Torvalds iov = snd_buf->head; 11151da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 11161da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 11171da177e4SLinus Torvalds 111800fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 11191da177e4SLinus Torvalds status = -EIO; /* XXX? */ 11201da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1121fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 11221da177e4SLinus Torvalds else if (maj_stat) 11231da177e4SLinus Torvalds return status; 11241da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 11271da177e4SLinus Torvalds iov->iov_len += offset; 11281da177e4SLinus Torvalds snd_buf->len += offset; 11291da177e4SLinus Torvalds return 0; 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11322d2da60cSJ. Bruce Fields static void 11332d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 11342d2da60cSJ. Bruce Fields { 11352d2da60cSJ. Bruce Fields int i; 11362d2da60cSJ. Bruce Fields 11372d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 11382d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 11392d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 11402d2da60cSJ. Bruce Fields } 11412d2da60cSJ. Bruce Fields 11422d2da60cSJ. Bruce Fields static int 11432d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 11442d2da60cSJ. Bruce Fields { 11452d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 11462d2da60cSJ. Bruce Fields int first, last, i; 11472d2da60cSJ. Bruce Fields 11482d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 11492d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 11502d2da60cSJ. Bruce Fields return 0; 11512d2da60cSJ. Bruce Fields } 11522d2da60cSJ. Bruce Fields 11532d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 11542d2da60cSJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 11552d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 11562d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 11572d2da60cSJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 11582d2da60cSJ. Bruce Fields GFP_NOFS); 11592d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 11602d2da60cSJ. Bruce Fields goto out; 11612d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 11622d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 11632d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 11642d2da60cSJ. Bruce Fields goto out_free; 11652d2da60cSJ. Bruce Fields } 11662d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 11672d2da60cSJ. Bruce Fields return 0; 11682d2da60cSJ. Bruce Fields out_free: 11692d2da60cSJ. Bruce Fields for (i--; i >= 0; i--) { 11702d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 11712d2da60cSJ. Bruce Fields } 11722d2da60cSJ. Bruce Fields out: 11732d2da60cSJ. Bruce Fields return -EAGAIN; 11742d2da60cSJ. Bruce Fields } 11752d2da60cSJ. Bruce Fields 11762d2da60cSJ. Bruce Fields static inline int 11772d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1178d8ed029dSAlexey Dobriyan kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) 11792d2da60cSJ. Bruce Fields { 11802d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 11812d2da60cSJ. Bruce Fields u32 offset; 11822d2da60cSJ. Bruce Fields u32 maj_stat; 11832d2da60cSJ. Bruce Fields int status; 1184d8ed029dSAlexey Dobriyan __be32 *opaque_len; 11852d2da60cSJ. Bruce Fields struct page **inpages; 11862d2da60cSJ. Bruce Fields int first; 11872d2da60cSJ. Bruce Fields int pad; 11882d2da60cSJ. Bruce Fields struct kvec *iov; 11892d2da60cSJ. Bruce Fields char *tmp; 11902d2da60cSJ. Bruce Fields 11912d2da60cSJ. Bruce Fields opaque_len = p++; 11922d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 11932d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 11942d2da60cSJ. Bruce Fields 119588a9fe8cSTrond Myklebust status = encode(rqstp, p, obj); 11962d2da60cSJ. Bruce Fields if (status) 11972d2da60cSJ. Bruce Fields return status; 11982d2da60cSJ. Bruce Fields 11992d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 12002d2da60cSJ. Bruce Fields if (status) 12012d2da60cSJ. Bruce Fields return status; 12022d2da60cSJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 12032d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 12042d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 12052d2da60cSJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 12062d2da60cSJ. Bruce Fields /* Give the tail its own page, in case we need extra space in the 12072d2da60cSJ. Bruce Fields * head when wrapping: */ 12082d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 12092d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 12102d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 12112d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 12122d2da60cSJ. Bruce Fields } 121300fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 12142d2da60cSJ. Bruce Fields /* RPC_SLACK_SPACE should prevent this ever happening: */ 12152d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 12162d2da60cSJ. Bruce Fields status = -EIO; 12172d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 12182d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 12192d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1220fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12212d2da60cSJ. Bruce Fields else if (maj_stat) 12222d2da60cSJ. Bruce Fields return status; 12232d2da60cSJ. Bruce Fields 12242d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 12252d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 12262d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 12272d2da60cSJ. Bruce Fields iov = snd_buf->tail; 12282d2da60cSJ. Bruce Fields else 12292d2da60cSJ. Bruce Fields iov = snd_buf->head; 12302d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 12312d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 12322d2da60cSJ. Bruce Fields memset(p, 0, pad); 12332d2da60cSJ. Bruce Fields iov->iov_len += pad; 12342d2da60cSJ. Bruce Fields snd_buf->len += pad; 12352d2da60cSJ. Bruce Fields 12362d2da60cSJ. Bruce Fields return 0; 12372d2da60cSJ. Bruce Fields } 12382d2da60cSJ. Bruce Fields 12391da177e4SLinus Torvalds static int 12401da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 1241d8ed029dSAlexey Dobriyan kxdrproc_t encode, void *rqstp, __be32 *p, void *obj) 12421da177e4SLinus Torvalds { 12431da177e4SLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 12441da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 12451da177e4SLinus Torvalds gc_base); 12461da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 12471da177e4SLinus Torvalds int status = -EIO; 12481da177e4SLinus Torvalds 12498885cb36SChuck Lever dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid); 12501da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 12511da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 12521da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 12531da177e4SLinus Torvalds */ 125488a9fe8cSTrond Myklebust status = encode(rqstp, p, obj); 12551da177e4SLinus Torvalds goto out; 12561da177e4SLinus Torvalds } 12571da177e4SLinus Torvalds switch (gss_cred->gc_service) { 12581da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 125988a9fe8cSTrond Myklebust status = encode(rqstp, p, obj); 12601da177e4SLinus Torvalds break; 12611da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 12621da177e4SLinus Torvalds status = gss_wrap_req_integ(cred, ctx, encode, 12631da177e4SLinus Torvalds rqstp, p, obj); 12641da177e4SLinus Torvalds break; 12651da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 12662d2da60cSJ. Bruce Fields status = gss_wrap_req_priv(cred, ctx, encode, 12672d2da60cSJ. Bruce Fields rqstp, p, obj); 12681da177e4SLinus Torvalds break; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds out: 12711da177e4SLinus Torvalds gss_put_ctx(ctx); 12728885cb36SChuck Lever dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status); 12731da177e4SLinus Torvalds return status; 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds static inline int 12771da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1278d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 12791da177e4SLinus Torvalds { 12801da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 12811da177e4SLinus Torvalds struct xdr_buf integ_buf; 12821da177e4SLinus Torvalds struct xdr_netobj mic; 12831da177e4SLinus Torvalds u32 data_offset, mic_offset; 12841da177e4SLinus Torvalds u32 integ_len; 12851da177e4SLinus Torvalds u32 maj_stat; 12861da177e4SLinus Torvalds int status = -EIO; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 12891da177e4SLinus Torvalds if (integ_len & 3) 12901da177e4SLinus Torvalds return status; 12911da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 12921da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 12931da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 12941da177e4SLinus Torvalds return status; 12951da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 12961da177e4SLinus Torvalds return status; 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 12991da177e4SLinus Torvalds mic_offset - data_offset)) 13001da177e4SLinus Torvalds return status; 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 13031da177e4SLinus Torvalds return status; 13041da177e4SLinus Torvalds 130500fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13061da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1307fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13081da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 13091da177e4SLinus Torvalds return status; 13101da177e4SLinus Torvalds return 0; 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds 13132d2da60cSJ. Bruce Fields static inline int 13142d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1315d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 13162d2da60cSJ. Bruce Fields { 13172d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 13182d2da60cSJ. Bruce Fields u32 offset; 13192d2da60cSJ. Bruce Fields u32 opaque_len; 13202d2da60cSJ. Bruce Fields u32 maj_stat; 13212d2da60cSJ. Bruce Fields int status = -EIO; 13222d2da60cSJ. Bruce Fields 13232d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 13242d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 13252d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 13262d2da60cSJ. Bruce Fields return status; 13272d2da60cSJ. Bruce Fields /* remove padding: */ 13282d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 13292d2da60cSJ. Bruce Fields 133000fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 13312d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1332fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13332d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 13342d2da60cSJ. Bruce Fields return status; 13352d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 13362d2da60cSJ. Bruce Fields return status; 13372d2da60cSJ. Bruce Fields 13382d2da60cSJ. Bruce Fields return 0; 13392d2da60cSJ. Bruce Fields } 13402d2da60cSJ. Bruce Fields 13412d2da60cSJ. Bruce Fields 13421da177e4SLinus Torvalds static int 13431da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 1344d8ed029dSAlexey Dobriyan kxdrproc_t decode, void *rqstp, __be32 *p, void *obj) 13451da177e4SLinus Torvalds { 13461da177e4SLinus Torvalds struct rpc_cred *cred = task->tk_msg.rpc_cred; 13471da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 13481da177e4SLinus Torvalds gc_base); 13491da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1350d8ed029dSAlexey Dobriyan __be32 *savedp = p; 13512d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 13522d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 13531da177e4SLinus Torvalds int status = -EIO; 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 13561da177e4SLinus Torvalds goto out_decode; 13571da177e4SLinus Torvalds switch (gss_cred->gc_service) { 13581da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 13591da177e4SLinus Torvalds break; 13601da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 13611da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 13621da177e4SLinus Torvalds if (status) 13631da177e4SLinus Torvalds goto out; 13641da177e4SLinus Torvalds break; 13651da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 13662d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 13672d2da60cSJ. Bruce Fields if (status) 13682d2da60cSJ. Bruce Fields goto out; 13691da177e4SLinus Torvalds break; 13701da177e4SLinus Torvalds } 137124b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 13721be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 13732d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 13741da177e4SLinus Torvalds out_decode: 137588a9fe8cSTrond Myklebust status = decode(rqstp, p, obj); 13761da177e4SLinus Torvalds out: 13771da177e4SLinus Torvalds gss_put_ctx(ctx); 13788885cb36SChuck Lever dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid, 13791da177e4SLinus Torvalds status); 13801da177e4SLinus Torvalds return status; 13811da177e4SLinus Torvalds } 13821da177e4SLinus Torvalds 1383f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 13841da177e4SLinus Torvalds .owner = THIS_MODULE, 13851da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 13861da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 13871da177e4SLinus Torvalds .create = gss_create, 13881da177e4SLinus Torvalds .destroy = gss_destroy, 13891da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 13901da177e4SLinus Torvalds .crcreate = gss_create_cred 13911da177e4SLinus Torvalds }; 13921da177e4SLinus Torvalds 1393f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 13941da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 13951da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 1396fba3bad4STrond Myklebust .cr_init = gss_cred_init, 13975c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 13981da177e4SLinus Torvalds .crmatch = gss_match, 13991da177e4SLinus Torvalds .crmarshal = gss_marshal, 14001da177e4SLinus Torvalds .crrefresh = gss_refresh, 14011da177e4SLinus Torvalds .crvalidate = gss_validate, 14021da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 14031da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 14041da177e4SLinus Torvalds }; 14051da177e4SLinus Torvalds 14060df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 14070df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 14086dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 14095c691044STrond Myklebust .crbind = rpcauth_generic_bind_cred, 14100df7fb74STrond Myklebust .crmatch = gss_match, 14110df7fb74STrond Myklebust .crmarshal = gss_marshal, 14120df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 14130df7fb74STrond Myklebust .crvalidate = gss_validate, 14140df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 14150df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 14160df7fb74STrond Myklebust }; 14170df7fb74STrond Myklebust 14181da177e4SLinus Torvalds static struct rpc_pipe_ops gss_upcall_ops = { 14191da177e4SLinus Torvalds .upcall = gss_pipe_upcall, 14201da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 14211da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 1422cf81939dS\"J. Bruce Fields\ .open_pipe = gss_pipe_open, 14231da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 14241da177e4SLinus Torvalds }; 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds /* 14271da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 14281da177e4SLinus Torvalds */ 14291da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 14301da177e4SLinus Torvalds { 14311da177e4SLinus Torvalds int err = 0; 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 14341da177e4SLinus Torvalds if (err) 14351da177e4SLinus Torvalds goto out; 14361da177e4SLinus Torvalds err = gss_svc_init(); 14371da177e4SLinus Torvalds if (err) 14381da177e4SLinus Torvalds goto out_unregister; 143979a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 14401da177e4SLinus Torvalds return 0; 14411da177e4SLinus Torvalds out_unregister: 14421da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 14431da177e4SLinus Torvalds out: 14441da177e4SLinus Torvalds return err; 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds 14471da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 14481da177e4SLinus Torvalds { 14491da177e4SLinus Torvalds gss_svc_shutdown(); 14501da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 14511da177e4SLinus Torvalds } 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 14541da177e4SLinus Torvalds module_init(init_rpcsec_gss) 14551da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 1456