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> 537c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 54eb6dc19dSTrond Myklebust #include <linux/hashtable.h> 551da177e4SLinus Torvalds 56abfdbd53STrond Myklebust #include "../netns.h" 57abfdbd53STrond Myklebust 58f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 591da177e4SLinus Torvalds 60f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 610df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 621da177e4SLinus Torvalds 63126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 64126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 65126e216aSTrond Myklebust 664de6caa2SAndy Adamson #define GSS_KEY_EXPIRE_TIMEO 240 674de6caa2SAndy Adamson static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; 684de6caa2SAndy Adamson 69f895b252SJeff Layton #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) 701da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 711da177e4SLinus Torvalds #endif 721da177e4SLinus Torvalds 73725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 741da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 751da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 76adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 771da177e4SLinus Torvalds 7823c323afSTrond Myklebust static DEFINE_HASHTABLE(gss_auth_hash_table, 4); 79eb6dc19dSTrond Myklebust static DEFINE_SPINLOCK(gss_auth_hash_lock); 80eb6dc19dSTrond Myklebust 8119172284STrond Myklebust struct gss_pipe { 8219172284STrond Myklebust struct rpc_pipe_dir_object pdo; 8319172284STrond Myklebust struct rpc_pipe *pipe; 8419172284STrond Myklebust struct rpc_clnt *clnt; 8519172284STrond Myklebust const char *name; 86414a6295STrond Myklebust struct kref kref; 8719172284STrond Myklebust }; 8819172284STrond Myklebust 891da177e4SLinus Torvalds struct gss_auth { 900285ed1fSTrond Myklebust struct kref kref; 91eb6dc19dSTrond Myklebust struct hlist_node hash; 921da177e4SLinus Torvalds struct rpc_auth rpc_auth; 931da177e4SLinus Torvalds struct gss_api_mech *mech; 941da177e4SLinus Torvalds enum rpc_gss_svc service; 951da177e4SLinus Torvalds struct rpc_clnt *client; 96e726340aSTrond Myklebust struct net *net; 9734769fc4S\"J. Bruce Fields\ /* 9834769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 9934769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 10034769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 10134769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 10234769fc4S\"J. Bruce Fields\ */ 10319172284STrond Myklebust struct gss_pipe *gss_pipe[2]; 104bd4a3eb1STrond Myklebust const char *target_name; 1051da177e4SLinus Torvalds }; 1061da177e4SLinus Torvalds 10779a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 10879a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 10979a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 11079a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 1119eb2ddb4STrond Myklebust static void gss_put_auth(struct gss_auth *gss_auth); 112cf81939dS\"J. Bruce Fields\ 1135d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 114b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 115b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds static inline struct gss_cl_ctx * 1181da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 1191da177e4SLinus Torvalds { 1200fa10472SReshetova, Elena refcount_inc(&ctx->count); 1211da177e4SLinus Torvalds return ctx; 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static inline void 1251da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1261da177e4SLinus Torvalds { 1270fa10472SReshetova, Elena if (refcount_dec_and_test(&ctx->count)) 1285d28dc82STrond Myklebust gss_free_ctx(ctx); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1315d28dc82STrond Myklebust /* gss_cred_set_ctx: 1325d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1335d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1349beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1355d28dc82STrond Myklebust */ 1361da177e4SLinus Torvalds static void 1371da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1381da177e4SLinus Torvalds { 1391da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1405d28dc82STrond Myklebust 141cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 142cd019f75STrond Myklebust return; 1437b6962b0STrond Myklebust gss_get_ctx(ctx); 144cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 145fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1464e857c58SPeter Zijlstra smp_mb__before_atomic(); 147fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static const void * 1511da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1541da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1551da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1561da177e4SLinus Torvalds memcpy(res, p, len); 1571da177e4SLinus Torvalds return q; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static inline const void * 1611da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds const void *q; 1641da177e4SLinus Torvalds unsigned int len; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1671da177e4SLinus Torvalds if (IS_ERR(p)) 1681da177e4SLinus Torvalds return p; 1691da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1701da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1711da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1720f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1731da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1741da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1751da177e4SLinus Torvalds dest->len = len; 1761da177e4SLinus Torvalds return q; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static struct gss_cl_ctx * 1801da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1831da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1841da177e4SLinus Torvalds 1855d28dc82STrond Myklebust rcu_read_lock(); 186c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 187c5e6aecdSJeff Layton if (ctx) 188c5e6aecdSJeff Layton gss_get_ctx(ctx); 1895d28dc82STrond Myklebust rcu_read_unlock(); 1901da177e4SLinus Torvalds return ctx; 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds static struct gss_cl_ctx * 1941da177e4SLinus Torvalds gss_alloc_context(void) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1971da177e4SLinus Torvalds 1980f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1991da177e4SLinus Torvalds if (ctx != NULL) { 2001da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 2011da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 2021da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 2030fa10472SReshetova, Elena refcount_set(&ctx->count,1); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return ctx; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 2091da177e4SLinus Torvalds static const void * 2101da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds const void *q; 2131da177e4SLinus Torvalds unsigned int seclen; 2141da177e4SLinus Torvalds unsigned int timeout; 215620038f6SAndy Adamson unsigned long now = jiffies; 2161da177e4SLinus Torvalds u32 window_size; 2171da177e4SLinus Torvalds int ret; 2181da177e4SLinus Torvalds 219620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 220620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 221620038f6SAndy Adamson * the -t value passed to GSSD. 222620038f6SAndy Adamson */ 2231da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2241da177e4SLinus Torvalds if (IS_ERR(p)) 2251da177e4SLinus Torvalds goto err; 2261da177e4SLinus Torvalds if (timeout == 0) 2271da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 228620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 229620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 230620038f6SAndy Adamson * simultaneous requests 231620038f6SAndy Adamson */ 2321da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2331da177e4SLinus Torvalds if (IS_ERR(p)) 2341da177e4SLinus Torvalds goto err; 2351da177e4SLinus Torvalds ctx->gc_win = window_size; 2361da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2371da177e4SLinus Torvalds if (ctx->gc_win == 0) { 238dc5ddce9SJeff Layton /* 239dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 240dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 241dc5ddce9SJeff Layton */ 242dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 243dc5ddce9SJeff Layton if (!IS_ERR(p)) 244dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 245dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2461da177e4SLinus Torvalds goto err; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds /* copy the opaque wire context */ 2491da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2501da177e4SLinus Torvalds if (IS_ERR(p)) 2511da177e4SLinus Torvalds goto err; 2521da177e4SLinus Torvalds /* import the opaque security context */ 2531da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2541da177e4SLinus Torvalds if (IS_ERR(p)) 2551da177e4SLinus Torvalds goto err; 2561da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2571da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2581da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2591da177e4SLinus Torvalds goto err; 2601da177e4SLinus Torvalds } 261400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2621da177e4SLinus Torvalds if (ret < 0) { 2631da177e4SLinus Torvalds p = ERR_PTR(ret); 2641da177e4SLinus Torvalds goto err; 2651da177e4SLinus Torvalds } 2662004c726SJeff Layton 2672004c726SJeff Layton /* is there any trailing data? */ 2682004c726SJeff Layton if (q == end) { 2692004c726SJeff Layton p = q; 2702004c726SJeff Layton goto done; 2712004c726SJeff Layton } 2722004c726SJeff Layton 2732004c726SJeff Layton /* pull in acceptor name (if there is one) */ 2742004c726SJeff Layton p = simple_get_netobj(q, end, &ctx->gc_acceptor); 2752004c726SJeff Layton if (IS_ERR(p)) 2762004c726SJeff Layton goto err; 2772004c726SJeff Layton done: 2782004c726SJeff Layton dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u acceptor %.*s\n", 2792004c726SJeff Layton __func__, ctx->gc_expiry, now, timeout, ctx->gc_acceptor.len, 2802004c726SJeff Layton ctx->gc_acceptor.data); 2812004c726SJeff Layton return p; 2821da177e4SLinus Torvalds err: 283173db309SJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2841da177e4SLinus Torvalds return p; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 287a1a23777SChuck Lever /* XXX: Need some documentation about why UPCALL_BUF_LEN is so small. 288a1a23777SChuck Lever * Is user space expecting no more than UPCALL_BUF_LEN bytes? 289a1a23777SChuck Lever * Note that there are now _two_ NI_MAXHOST sized data items 290a1a23777SChuck Lever * being passed in this string. 291a1a23777SChuck Lever */ 292a1a23777SChuck Lever #define UPCALL_BUF_LEN 256 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds struct gss_upcall_msg { 2957ff13969SReshetova, Elena refcount_t count; 2967eaf040bSEric W. Biederman kuid_t uid; 2971da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2981da177e4SLinus Torvalds struct list_head list; 2991da177e4SLinus Torvalds struct gss_auth *auth; 3009beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 3011da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 3021da177e4SLinus Torvalds wait_queue_head_t waitqueue; 3031da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 30434769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 3051da177e4SLinus Torvalds }; 3061da177e4SLinus Torvalds 3072aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 30879a3f20bS\"J. Bruce Fields\ { 3092aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 31079a3f20bS\"J. Bruce Fields\ int ret; 31179a3f20bS\"J. Bruce Fields\ 31279a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 3132aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 3142aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 3152aed8b47STrond Myklebust ret = sn->pipe_version; 31679a3f20bS\"J. Bruce Fields\ } else 31779a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 31879a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 31979a3f20bS\"J. Bruce Fields\ return ret; 32079a3f20bS\"J. Bruce Fields\ } 32179a3f20bS\"J. Bruce Fields\ 3222aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 32379a3f20bS\"J. Bruce Fields\ { 3242aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 3252aed8b47STrond Myklebust 3262aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 3272aed8b47STrond Myklebust sn->pipe_version = -1; 32879a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 32979a3f20bS\"J. Bruce Fields\ } 33079a3f20bS\"J. Bruce Fields\ } 33179a3f20bS\"J. Bruce Fields\ 3321da177e4SLinus Torvalds static void 3331da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 3341da177e4SLinus Torvalds { 335e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3367ff13969SReshetova, Elena if (!refcount_dec_and_test(&gss_msg->count)) 3371da177e4SLinus Torvalds return; 3382aed8b47STrond Myklebust put_pipe_version(net); 3391da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3401da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3411da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 342f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3439eb2ddb4STrond Myklebust gss_put_auth(gss_msg->auth); 3441da177e4SLinus Torvalds kfree(gss_msg); 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds static struct gss_upcall_msg * 3489130b8dbSOlga Kornievskaia __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3519beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3520b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3531da177e4SLinus Torvalds continue; 3549130b8dbSOlga Kornievskaia if (auth && pos->auth->service != auth->service) 3559130b8dbSOlga Kornievskaia continue; 3567ff13969SReshetova, Elena refcount_inc(&pos->count); 357632f0d05SChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3581da177e4SLinus Torvalds return pos; 3591da177e4SLinus Torvalds } 360632f0d05SChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3611da177e4SLinus Torvalds return NULL; 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds 364720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3651da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3661da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3671da177e4SLinus Torvalds */ 3681da177e4SLinus Torvalds static inline struct gss_upcall_msg * 369053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3701da177e4SLinus Torvalds { 3719beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3721da177e4SLinus Torvalds struct gss_upcall_msg *old; 3731da177e4SLinus Torvalds 3749beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3759130b8dbSOlga Kornievskaia old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth); 3761da177e4SLinus Torvalds if (old == NULL) { 3777ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 3789beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3791da177e4SLinus Torvalds } else 3801da177e4SLinus Torvalds gss_msg = old; 3819beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3821da177e4SLinus Torvalds return gss_msg; 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds static void 3861da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3871da177e4SLinus Torvalds { 3881da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3891da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3901da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3917ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds static void 3951da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3961da177e4SLinus Torvalds { 3979beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3981da177e4SLinus Torvalds 3993b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 4003b68aaeaSTrond Myklebust return; 4019beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 4023b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 4031da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 4049beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds static void 408126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 409126e216aSTrond Myklebust { 410126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 411126e216aSTrond Myklebust case 0: 412126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 413126e216aSTrond Myklebust break; 414126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 415126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 416126e216aSTrond Myklebust break; 417126e216aSTrond Myklebust case -EKEYEXPIRED: 418126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 419126e216aSTrond Myklebust } 420126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 421126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 422126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 423126e216aSTrond Myklebust } 424126e216aSTrond Myklebust 425126e216aSTrond Myklebust static void 4261da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 4271da177e4SLinus Torvalds { 428a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 4291da177e4SLinus Torvalds struct gss_cred, gc_base); 4301da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 4319beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 4321da177e4SLinus Torvalds 4339beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 434126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 4359beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 436126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 4371da177e4SLinus Torvalds gss_release_msg(gss_msg); 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 44034769fc4S\"J. Bruce Fields\ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 44134769fc4S\"J. Bruce Fields\ { 44290602c7bSEric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 44390602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 44490602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 44590602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 4469d3a2260STrond Myklebust 4479d3a2260STrond Myklebust BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); 44834769fc4S\"J. Bruce Fields\ } 44934769fc4S\"J. Bruce Fields\ 4509d3a2260STrond Myklebust static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 451bd4a3eb1STrond Myklebust const char *service_name, 452bd4a3eb1STrond Myklebust const char *target_name) 45334769fc4S\"J. Bruce Fields\ { 454683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4558b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4569d3a2260STrond Myklebust size_t buflen = sizeof(gss_msg->databuf); 4579d3a2260STrond Myklebust int len; 4588b1c7bf5SOlga Kornievskaia 4599d3a2260STrond Myklebust len = scnprintf(p, buflen, "mech=%s uid=%d ", mech->gm_name, 46090602c7bSEric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4619d3a2260STrond Myklebust buflen -= len; 4629d3a2260STrond Myklebust p += len; 4639d3a2260STrond Myklebust gss_msg->msg.len = len; 464108b833cSChuck Lever 465108b833cSChuck Lever /* 466108b833cSChuck Lever * target= is a full service principal that names the remote 467108b833cSChuck Lever * identity that we are authenticating to. 468108b833cSChuck Lever */ 469bd4a3eb1STrond Myklebust if (target_name) { 4709d3a2260STrond Myklebust len = scnprintf(p, buflen, "target=%s ", target_name); 4719d3a2260STrond Myklebust buflen -= len; 4728b1c7bf5SOlga Kornievskaia p += len; 4738b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4748b1c7bf5SOlga Kornievskaia } 475108b833cSChuck Lever 476108b833cSChuck Lever /* 477108b833cSChuck Lever * gssd uses service= and srchost= to select a matching key from 478108b833cSChuck Lever * the system's keytab to use as the source principal. 479108b833cSChuck Lever * 480108b833cSChuck Lever * service= is the service name part of the source principal, 481108b833cSChuck Lever * or "*" (meaning choose any). 482108b833cSChuck Lever * 483108b833cSChuck Lever * srchost= is the hostname part of the source principal. When 484108b833cSChuck Lever * not provided, gssd uses the local hostname. 485108b833cSChuck Lever */ 486a1a23777SChuck Lever if (service_name) { 487a1a23777SChuck Lever char *c = strchr(service_name, '@'); 488a1a23777SChuck Lever 489a1a23777SChuck Lever if (!c) 490a1a23777SChuck Lever len = scnprintf(p, buflen, "service=%s ", 491a1a23777SChuck Lever service_name); 492a1a23777SChuck Lever else 493a1a23777SChuck Lever len = scnprintf(p, buflen, 494a1a23777SChuck Lever "service=%.*s srchost=%s ", 495a1a23777SChuck Lever (int)(c - service_name), 496a1a23777SChuck Lever service_name, c + 1); 4979d3a2260STrond Myklebust buflen -= len; 4982efef708SOlga Kornievskaia p += len; 4992efef708SOlga Kornievskaia gss_msg->msg.len += len; 5002efef708SOlga Kornievskaia } 501108b833cSChuck Lever 502683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 5039d3a2260STrond Myklebust len = scnprintf(p, buflen, "enctypes=%s ", 5049d3a2260STrond Myklebust mech->gm_upcall_enctypes); 5059d3a2260STrond Myklebust buflen -= len; 506683ac665STrond Myklebust p += len; 507683ac665STrond Myklebust gss_msg->msg.len += len; 508683ac665STrond Myklebust } 5099d3a2260STrond Myklebust len = scnprintf(p, buflen, "\n"); 5109d3a2260STrond Myklebust if (len == 0) 5119d3a2260STrond Myklebust goto out_overflow; 5128b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 5138b1c7bf5SOlga Kornievskaia 51434769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 5159d3a2260STrond Myklebust return 0; 5169d3a2260STrond Myklebust out_overflow: 5179d3a2260STrond Myklebust WARN_ON_ONCE(1); 5189d3a2260STrond Myklebust return -ENOMEM; 51934769fc4S\"J. Bruce Fields\ } 52034769fc4S\"J. Bruce Fields\ 52168c97153STrond Myklebust static struct gss_upcall_msg * 522e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 5237eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 5241da177e4SLinus Torvalds { 5251da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 52679a3f20bS\"J. Bruce Fields\ int vers; 5279d3a2260STrond Myklebust int err = -ENOMEM; 5281da177e4SLinus Torvalds 5290f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 530db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 5319d3a2260STrond Myklebust goto err; 532e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 5339d3a2260STrond Myklebust err = vers; 5349d3a2260STrond Myklebust if (err < 0) 5359d3a2260STrond Myklebust goto err_free_msg; 53619172284STrond Myklebust gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; 5371da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 5381da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 5391da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 5407ff13969SReshetova, Elena refcount_set(&gss_msg->count, 1); 5411da177e4SLinus Torvalds gss_msg->uid = uid; 5421da177e4SLinus Torvalds gss_msg->auth = gss_auth; 543bd4a3eb1STrond Myklebust switch (vers) { 544bd4a3eb1STrond Myklebust case 0: 545bd4a3eb1STrond Myklebust gss_encode_v0_msg(gss_msg); 5465fccc5b5STrond Myklebust break; 547bd4a3eb1STrond Myklebust default: 5489d3a2260STrond Myklebust err = gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); 5499d3a2260STrond Myklebust if (err) 550e9776d0fSTrond Myklebust goto err_put_pipe_version; 55107d53ae4Szhong jiang } 5529eb2ddb4STrond Myklebust kref_get(&gss_auth->kref); 5531da177e4SLinus Torvalds return gss_msg; 554e9776d0fSTrond Myklebust err_put_pipe_version: 555e9776d0fSTrond Myklebust put_pipe_version(gss_auth->net); 5569d3a2260STrond Myklebust err_free_msg: 5579d3a2260STrond Myklebust kfree(gss_msg); 5589d3a2260STrond Myklebust err: 5599d3a2260STrond Myklebust return ERR_PTR(err); 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds static struct gss_upcall_msg * 563e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 5641da177e4SLinus Torvalds { 5657c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 5667c67db3aSTrond Myklebust struct gss_cred, gc_base); 5671da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 56804d1532bSNeilBrown kuid_t uid = cred->cr_cred->fsuid; 5691da177e4SLinus Torvalds 570e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 571db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 572db75b3d6S\"J. Bruce Fields\ return gss_new; 573053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 5741da177e4SLinus Torvalds if (gss_msg == gss_new) { 5751cded9d2SNeilBrown int res; 5767ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 5771cded9d2SNeilBrown res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 5781da177e4SLinus Torvalds if (res) { 5791da177e4SLinus Torvalds gss_unhash_msg(gss_new); 5807ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 5811cded9d2SNeilBrown gss_release_msg(gss_new); 5821da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds } else 5851da177e4SLinus Torvalds gss_release_msg(gss_new); 5861da177e4SLinus Torvalds return gss_msg; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds 589b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 590b03568c3S\"J. Bruce Fields\ { 5910ea9de0eSJeff Layton dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); 592b03568c3S\"J. Bruce Fields\ } 593b03568c3S\"J. Bruce Fields\ 5941da177e4SLinus Torvalds static inline int 5951da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 5961da177e4SLinus Torvalds { 597a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5984a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5991da177e4SLinus Torvalds struct gss_auth, rpc_auth); 6001da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 6011da177e4SLinus Torvalds struct gss_cred, gc_base); 6021da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6039beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6041da177e4SLinus Torvalds int err = 0; 6051da177e4SLinus Torvalds 606632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u\n", 60704d1532bSNeilBrown task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_cred->fsuid)); 608e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 609480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 61079a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 61179a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 61279a3f20bS\"J. Bruce Fields\ warn_gssd(); 61379a3f20bS\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 61479a3f20bS\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 615d1a8016aSBryan Schumaker return -EAGAIN; 61679a3f20bS\"J. Bruce Fields\ } 6171da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6181da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6191da177e4SLinus Torvalds goto out; 6201da177e4SLinus Torvalds } 6219beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6229beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6231da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 6245d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 625126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 6261da177e4SLinus Torvalds task->tk_timeout = 0; 6271da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 6281da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 6297ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 6305d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 631126e216aSTrond Myklebust } else { 632126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 6331da177e4SLinus Torvalds err = gss_msg->msg.errno; 634126e216aSTrond Myklebust } 6359beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6361da177e4SLinus Torvalds gss_release_msg(gss_msg); 6371da177e4SLinus Torvalds out: 638632f0d05SChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 639cdba321eSEric W. Biederman task->tk_pid, __func__, 64004d1532bSNeilBrown from_kuid(&init_user_ns, cred->cr_cred->fsuid), err); 6411da177e4SLinus Torvalds return err; 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds static inline int 6451da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 6461da177e4SLinus Torvalds { 647e726340aSTrond Myklebust struct net *net = gss_auth->net; 648abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 6499beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6501da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 6511da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6521da177e4SLinus Torvalds DEFINE_WAIT(wait); 653d36ccb9cSTrond Myklebust int err; 6541da177e4SLinus Torvalds 655cdba321eSEric W. Biederman dprintk("RPC: %s for uid %u\n", 65604d1532bSNeilBrown __func__, from_kuid(&init_user_ns, cred->cr_cred->fsuid)); 65779a3f20bS\"J. Bruce Fields\ retry: 658d36ccb9cSTrond Myklebust err = 0; 65989f84243SJeff Layton /* if gssd is down, just skip upcalling altogether */ 66089f84243SJeff Layton if (!gssd_running(net)) { 66189f84243SJeff Layton warn_gssd(); 66289f84243SJeff Layton return -EACCES; 66389f84243SJeff Layton } 664e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 66579a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 66679a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 66789f84243SJeff Layton sn->pipe_version >= 0, 15 * HZ); 6682aed8b47STrond Myklebust if (sn->pipe_version < 0) { 669d1a8016aSBryan Schumaker warn_gssd(); 670d1a8016aSBryan Schumaker err = -EACCES; 671d1a8016aSBryan Schumaker } 672d36ccb9cSTrond Myklebust if (err < 0) 67379a3f20bS\"J. Bruce Fields\ goto out; 67479a3f20bS\"J. Bruce Fields\ goto retry; 67579a3f20bS\"J. Bruce Fields\ } 6761da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6771da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6781da177e4SLinus Torvalds goto out; 6791da177e4SLinus Torvalds } 6809beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6811da177e4SLinus Torvalds for (;;) { 6825afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6839beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6841da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds } 6879beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6885afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6891da177e4SLinus Torvalds err = -ERESTARTSYS; 6901da177e4SLinus Torvalds goto out_intr; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds schedule(); 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds if (gss_msg->ctx) 6957b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6961da177e4SLinus Torvalds else 6971da177e4SLinus Torvalds err = gss_msg->msg.errno; 6989beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6991da177e4SLinus Torvalds out_intr: 7001da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 7011da177e4SLinus Torvalds gss_release_msg(gss_msg); 7021da177e4SLinus Torvalds out: 703632f0d05SChuck Lever dprintk("RPC: %s for uid %u result %d\n", 70404d1532bSNeilBrown __func__, from_kuid(&init_user_ns, cred->cr_cred->fsuid), err); 7051da177e4SLinus Torvalds return err; 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds static ssize_t 7111da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 7121da177e4SLinus Torvalds { 7131da177e4SLinus Torvalds const void *p, *end; 7141da177e4SLinus Torvalds void *buf; 7151da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 716496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 7171da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 71890602c7bSEric W. Biederman uid_t id; 71990602c7bSEric W. Biederman kuid_t uid; 7203b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 7231da177e4SLinus Torvalds goto out; 7241da177e4SLinus Torvalds err = -ENOMEM; 7250f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 7261da177e4SLinus Torvalds if (!buf) 7271da177e4SLinus Torvalds goto out; 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds err = -EFAULT; 7301da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 7311da177e4SLinus Torvalds goto err; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 73490602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 7351da177e4SLinus Torvalds if (IS_ERR(p)) { 7361da177e4SLinus Torvalds err = PTR_ERR(p); 7371da177e4SLinus Torvalds goto err; 7381da177e4SLinus Torvalds } 7391da177e4SLinus Torvalds 74090602c7bSEric W. Biederman uid = make_kuid(&init_user_ns, id); 74190602c7bSEric W. Biederman if (!uid_valid(uid)) { 74290602c7bSEric W. Biederman err = -EINVAL; 74390602c7bSEric W. Biederman goto err; 74490602c7bSEric W. Biederman } 74590602c7bSEric W. Biederman 7461da177e4SLinus Torvalds err = -ENOMEM; 7471da177e4SLinus Torvalds ctx = gss_alloc_context(); 7481da177e4SLinus Torvalds if (ctx == NULL) 7491da177e4SLinus Torvalds goto err; 7503b68aaeaSTrond Myklebust 7513b68aaeaSTrond Myklebust err = -ENOENT; 7523b68aaeaSTrond Myklebust /* Find a matching upcall */ 7539beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7549130b8dbSOlga Kornievskaia gss_msg = __gss_find_upcall(pipe, uid, NULL); 7553b68aaeaSTrond Myklebust if (gss_msg == NULL) { 7569beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7573b68aaeaSTrond Myklebust goto err_put_ctx; 7583b68aaeaSTrond Myklebust } 7593b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 7609beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7613b68aaeaSTrond Myklebust 7626e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 7631da177e4SLinus Torvalds if (IS_ERR(p)) { 7641da177e4SLinus Torvalds err = PTR_ERR(p); 765486bad2eSJeff Layton switch (err) { 766486bad2eSJeff Layton case -EACCES: 767dc5ddce9SJeff Layton case -EKEYEXPIRED: 768486bad2eSJeff Layton gss_msg->msg.errno = err; 769486bad2eSJeff Layton err = mlen; 770486bad2eSJeff Layton break; 771486bad2eSJeff Layton case -EFAULT: 772486bad2eSJeff Layton case -ENOMEM: 773486bad2eSJeff Layton case -EINVAL: 774486bad2eSJeff Layton case -ENOSYS: 775486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 776486bad2eSJeff Layton break; 777486bad2eSJeff Layton default: 778486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7796c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 780437b300cSScott Mayhew gss_msg->msg.errno = -EIO; 781486bad2eSJeff Layton } 7823b68aaeaSTrond Myklebust goto err_release_msg; 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7853b68aaeaSTrond Myklebust err = mlen; 7863b68aaeaSTrond Myklebust 7873b68aaeaSTrond Myklebust err_release_msg: 7889beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7891da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7909beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7911da177e4SLinus Torvalds gss_release_msg(gss_msg); 7921da177e4SLinus Torvalds err_put_ctx: 7931da177e4SLinus Torvalds gss_put_ctx(ctx); 7941da177e4SLinus Torvalds err: 7951da177e4SLinus Torvalds kfree(buf); 7961da177e4SLinus Torvalds out: 7975b5e0928SAlexey Dobriyan dprintk("RPC: %s returning %zd\n", __func__, err); 7981da177e4SLinus Torvalds return err; 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds 80134769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 802cf81939dS\"J. Bruce Fields\ { 8032aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8042aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 80534769fc4S\"J. Bruce Fields\ int ret = 0; 80634769fc4S\"J. Bruce Fields\ 80779a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 8082aed8b47STrond Myklebust if (sn->pipe_version < 0) { 80934769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 8102aed8b47STrond Myklebust sn->pipe_version = new_version; 81179a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 81279a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 8132aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 81434769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 81534769fc4S\"J. Bruce Fields\ ret = -EBUSY; 81634769fc4S\"J. Bruce Fields\ goto out; 81779a3f20bS\"J. Bruce Fields\ } 8182aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 81934769fc4S\"J. Bruce Fields\ out: 82079a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 82134769fc4S\"J. Bruce Fields\ return ret; 82234769fc4S\"J. Bruce Fields\ 82334769fc4S\"J. Bruce Fields\ } 82434769fc4S\"J. Bruce Fields\ 82534769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 82634769fc4S\"J. Bruce Fields\ { 82734769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 82834769fc4S\"J. Bruce Fields\ } 82934769fc4S\"J. Bruce Fields\ 83034769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 83134769fc4S\"J. Bruce Fields\ { 83234769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 833cf81939dS\"J. Bruce Fields\ } 834cf81939dS\"J. Bruce Fields\ 8351da177e4SLinus Torvalds static void 8361da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 8371da177e4SLinus Torvalds { 8382aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8399beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 8401da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 8411da177e4SLinus Torvalds 8425a67657aSTrond Myklebust restart: 8439beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 8449beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 8456e84c7b6STrond Myklebust 8465a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 8475a67657aSTrond Myklebust continue; 8481da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 8497ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8501da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 8519beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 8521da177e4SLinus Torvalds gss_release_msg(gss_msg); 8535a67657aSTrond Myklebust goto restart; 8541da177e4SLinus Torvalds } 8559beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 856cf81939dS\"J. Bruce Fields\ 8572aed8b47STrond Myklebust put_pipe_version(net); 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds static void 8611da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 8621da177e4SLinus Torvalds { 8631da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds if (msg->errno < 0) { 866632f0d05SChuck Lever dprintk("RPC: %s releasing msg %p\n", 867632f0d05SChuck Lever __func__, gss_msg); 8687ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8691da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 870b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 871b03568c3S\"J. Bruce Fields\ warn_gssd(); 8721da177e4SLinus Torvalds gss_release_msg(gss_msg); 8731da177e4SLinus Torvalds } 8741cded9d2SNeilBrown gss_release_msg(gss_msg); 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds 87719172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 87819172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 879ccdc28f8SStanislav Kinsbursky { 88019172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 88119172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 882ccdc28f8SStanislav Kinsbursky 88319172284STrond Myklebust if (pipe->dentry != NULL) { 88419172284STrond Myklebust rpc_unlink(pipe->dentry); 88519172284STrond Myklebust pipe->dentry = NULL; 8866b2fddd3STrond Myklebust } 887ccdc28f8SStanislav Kinsbursky } 888ccdc28f8SStanislav Kinsbursky 88919172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 89019172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 891ccdc28f8SStanislav Kinsbursky { 89219172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8936b2fddd3STrond Myklebust struct dentry *dentry; 894ccdc28f8SStanislav Kinsbursky 89519172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 89619172284STrond Myklebust if (IS_ERR(dentry)) 89719172284STrond Myklebust return PTR_ERR(dentry); 89819172284STrond Myklebust p->pipe->dentry = dentry; 899ccdc28f8SStanislav Kinsbursky return 0; 90019172284STrond Myklebust } 901ccdc28f8SStanislav Kinsbursky 90219172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 90319172284STrond Myklebust .create = gss_pipe_dentry_create, 90419172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 90519172284STrond Myklebust }; 90619172284STrond Myklebust 90719172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 90819172284STrond Myklebust const char *name, 90919172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 91019172284STrond Myklebust { 91119172284STrond Myklebust struct gss_pipe *p; 91219172284STrond Myklebust int err = -ENOMEM; 91319172284STrond Myklebust 91419172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 91519172284STrond Myklebust if (p == NULL) 91619172284STrond Myklebust goto err; 91719172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 91819172284STrond Myklebust if (IS_ERR(p->pipe)) { 91919172284STrond Myklebust err = PTR_ERR(p->pipe); 92019172284STrond Myklebust goto err_free_gss_pipe; 92119172284STrond Myklebust } 92219172284STrond Myklebust p->name = name; 92319172284STrond Myklebust p->clnt = clnt; 924414a6295STrond Myklebust kref_init(&p->kref); 92519172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 92619172284STrond Myklebust &gss_pipe_dir_object_ops, 92719172284STrond Myklebust p); 92819172284STrond Myklebust return p; 92919172284STrond Myklebust err_free_gss_pipe: 93019172284STrond Myklebust kfree(p); 9316b2fddd3STrond Myklebust err: 93219172284STrond Myklebust return ERR_PTR(err); 933ccdc28f8SStanislav Kinsbursky } 934ccdc28f8SStanislav Kinsbursky 935414a6295STrond Myklebust struct gss_alloc_pdo { 936414a6295STrond Myklebust struct rpc_clnt *clnt; 937414a6295STrond Myklebust const char *name; 938414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops; 939414a6295STrond Myklebust }; 940414a6295STrond Myklebust 941414a6295STrond Myklebust static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) 942414a6295STrond Myklebust { 943414a6295STrond Myklebust struct gss_pipe *gss_pipe; 944414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 945414a6295STrond Myklebust 946414a6295STrond Myklebust if (pdo->pdo_ops != &gss_pipe_dir_object_ops) 947414a6295STrond Myklebust return 0; 948414a6295STrond Myklebust gss_pipe = container_of(pdo, struct gss_pipe, pdo); 949414a6295STrond Myklebust if (strcmp(gss_pipe->name, args->name) != 0) 950414a6295STrond Myklebust return 0; 951414a6295STrond Myklebust if (!kref_get_unless_zero(&gss_pipe->kref)) 952414a6295STrond Myklebust return 0; 953414a6295STrond Myklebust return 1; 954414a6295STrond Myklebust } 955414a6295STrond Myklebust 956414a6295STrond Myklebust static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) 957414a6295STrond Myklebust { 958414a6295STrond Myklebust struct gss_pipe *gss_pipe; 959414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 960414a6295STrond Myklebust 961414a6295STrond Myklebust gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); 962414a6295STrond Myklebust if (!IS_ERR(gss_pipe)) 963414a6295STrond Myklebust return &gss_pipe->pdo; 964414a6295STrond Myklebust return NULL; 965414a6295STrond Myklebust } 966414a6295STrond Myklebust 967414a6295STrond Myklebust static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, 968414a6295STrond Myklebust const char *name, 969414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 970414a6295STrond Myklebust { 971414a6295STrond Myklebust struct net *net = rpc_net_ns(clnt); 972414a6295STrond Myklebust struct rpc_pipe_dir_object *pdo; 973414a6295STrond Myklebust struct gss_alloc_pdo args = { 974414a6295STrond Myklebust .clnt = clnt, 975414a6295STrond Myklebust .name = name, 976414a6295STrond Myklebust .upcall_ops = upcall_ops, 977414a6295STrond Myklebust }; 978414a6295STrond Myklebust 979414a6295STrond Myklebust pdo = rpc_find_or_alloc_pipe_dir_object(net, 980414a6295STrond Myklebust &clnt->cl_pipedir_objects, 981414a6295STrond Myklebust gss_pipe_match_pdo, 982414a6295STrond Myklebust gss_pipe_alloc_pdo, 983414a6295STrond Myklebust &args); 984414a6295STrond Myklebust if (pdo != NULL) 985414a6295STrond Myklebust return container_of(pdo, struct gss_pipe, pdo); 986414a6295STrond Myklebust return ERR_PTR(-ENOMEM); 987414a6295STrond Myklebust } 988414a6295STrond Myklebust 98919172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 990ccdc28f8SStanislav Kinsbursky { 99119172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 99219172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 993ccdc28f8SStanislav Kinsbursky 99419172284STrond Myklebust rpc_remove_pipe_dir_object(net, 99519172284STrond Myklebust &clnt->cl_pipedir_objects, 99619172284STrond Myklebust &p->pdo); 99719172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 99819172284STrond Myklebust kfree(p); 999ccdc28f8SStanislav Kinsbursky } 1000ccdc28f8SStanislav Kinsbursky 1001414a6295STrond Myklebust static void __gss_pipe_release(struct kref *kref) 1002414a6295STrond Myklebust { 1003414a6295STrond Myklebust struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); 1004414a6295STrond Myklebust 1005414a6295STrond Myklebust __gss_pipe_free(p); 1006414a6295STrond Myklebust } 1007414a6295STrond Myklebust 100819172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 1009ccdc28f8SStanislav Kinsbursky { 101019172284STrond Myklebust if (p != NULL) 1011414a6295STrond Myklebust kref_put(&p->kref, __gss_pipe_release); 1012ccdc28f8SStanislav Kinsbursky } 1013ccdc28f8SStanislav Kinsbursky 10141da177e4SLinus Torvalds /* 10151da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 10161da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 10171da177e4SLinus Torvalds */ 1018eb6dc19dSTrond Myklebust static struct gss_auth * 101982b98ca5SSargun Dhillon gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 10201da177e4SLinus Torvalds { 1021c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 10221da177e4SLinus Torvalds struct gss_auth *gss_auth; 102319172284STrond Myklebust struct gss_pipe *gss_pipe; 10241da177e4SLinus Torvalds struct rpc_auth * auth; 10256a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 10306a19275aSJ. Bruce Fields return ERR_PTR(err); 10311da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 10321da177e4SLinus Torvalds goto out_dec; 1033eb6dc19dSTrond Myklebust INIT_HLIST_NODE(&gss_auth->hash); 1034bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 1035c2190661STrond Myklebust if (args->target_name) { 1036c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 1037bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 1038bd4a3eb1STrond Myklebust goto err_free; 1039bd4a3eb1STrond Myklebust } 10401da177e4SLinus Torvalds gss_auth->client = clnt; 1041e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 10426a19275aSJ. Bruce Fields err = -EINVAL; 10431da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 10441da177e4SLinus Torvalds if (!gss_auth->mech) { 10459b1d75b7STrond Myklebust dprintk("RPC: Pseudoflavor %d not found!\n", flavor); 1046e726340aSTrond Myklebust goto err_put_net; 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 1049438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 1050438b6fdeSJ. Bruce Fields goto err_put_mech; 1051a699d65eSTrond Myklebust if (!gssd_running(gss_auth->net)) 1052a699d65eSTrond Myklebust goto err_put_mech; 10531da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 10541da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 10551da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 1056ce52914eSScott Mayhew auth->au_flags = 0; 10571da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 10581da177e4SLinus Torvalds auth->au_flavor = flavor; 105965b80179SChuck Lever if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor)) 106065b80179SChuck Lever auth->au_flags |= RPCAUTH_AUTH_DATATOUCH; 1061331bc71cSTrond Myklebust refcount_set(&auth->au_count, 1); 10620285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 10631da177e4SLinus Torvalds 106419172284STrond Myklebust err = rpcauth_init_credcache(auth); 106519172284STrond Myklebust if (err) 106619172284STrond Myklebust goto err_put_mech; 106734769fc4S\"J. Bruce Fields\ /* 106834769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 106934769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 107034769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 107134769fc4S\"J. Bruce Fields\ * the new pipe first. 107234769fc4S\"J. Bruce Fields\ */ 1073414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); 107419172284STrond Myklebust if (IS_ERR(gss_pipe)) { 107519172284STrond Myklebust err = PTR_ERR(gss_pipe); 107619172284STrond Myklebust goto err_destroy_credcache; 10776a19275aSJ. Bruce Fields } 107819172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 10791da177e4SLinus Torvalds 1080414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, 108119172284STrond Myklebust &gss_upcall_ops_v0); 108219172284STrond Myklebust if (IS_ERR(gss_pipe)) { 108319172284STrond Myklebust err = PTR_ERR(gss_pipe); 1084c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 1085c239d83bSStanislav Kinsbursky } 108619172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 108707a2bf1dSTrond Myklebust 1088eb6dc19dSTrond Myklebust return gss_auth; 1089c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 1090414a6295STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 109119172284STrond Myklebust err_destroy_credcache: 109219172284STrond Myklebust rpcauth_destroy_credcache(auth); 10931da177e4SLinus Torvalds err_put_mech: 10941da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 1095e726340aSTrond Myklebust err_put_net: 1096e726340aSTrond Myklebust put_net(gss_auth->net); 10971da177e4SLinus Torvalds err_free: 1098bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10991da177e4SLinus Torvalds kfree(gss_auth); 11001da177e4SLinus Torvalds out_dec: 11011da177e4SLinus Torvalds module_put(THIS_MODULE); 11026a19275aSJ. Bruce Fields return ERR_PTR(err); 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static void 11060285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 11070285ed1fSTrond Myklebust { 110819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 110919172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 11100285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 1111e726340aSTrond Myklebust put_net(gss_auth->net); 1112bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 11130285ed1fSTrond Myklebust 11140285ed1fSTrond Myklebust kfree(gss_auth); 11150285ed1fSTrond Myklebust module_put(THIS_MODULE); 11160285ed1fSTrond Myklebust } 11170285ed1fSTrond Myklebust 11180285ed1fSTrond Myklebust static void 11190285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 11200285ed1fSTrond Myklebust { 11210285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 11220285ed1fSTrond Myklebust 11230285ed1fSTrond Myklebust gss_free(gss_auth); 11240285ed1fSTrond Myklebust } 11250285ed1fSTrond Myklebust 11260285ed1fSTrond Myklebust static void 11279eb2ddb4STrond Myklebust gss_put_auth(struct gss_auth *gss_auth) 11289eb2ddb4STrond Myklebust { 11299eb2ddb4STrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 11309eb2ddb4STrond Myklebust } 11319eb2ddb4STrond Myklebust 11329eb2ddb4STrond Myklebust static void 11331da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 11341da177e4SLinus Torvalds { 113519172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 113619172284STrond Myklebust struct gss_auth, rpc_auth); 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 11391da177e4SLinus Torvalds auth, auth->au_flavor); 11401da177e4SLinus Torvalds 1141eb6dc19dSTrond Myklebust if (hash_hashed(&gss_auth->hash)) { 1142eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1143eb6dc19dSTrond Myklebust hash_del(&gss_auth->hash); 1144eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1145eb6dc19dSTrond Myklebust } 1146eb6dc19dSTrond Myklebust 114719172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 114819172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 114919172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 115019172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 11513ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 11523ab9bb72STrond Myklebust 11539eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 11541da177e4SLinus Torvalds } 11551da177e4SLinus Torvalds 1156a0f6ed8eSJ. Bruce Fields /* 1157a0f6ed8eSJ. Bruce Fields * Auths may be shared between rpc clients that were cloned from a 1158a0f6ed8eSJ. Bruce Fields * common client with the same xprt, if they also share the flavor and 1159a0f6ed8eSJ. Bruce Fields * target_name. 1160a0f6ed8eSJ. Bruce Fields * 1161a0f6ed8eSJ. Bruce Fields * The auth is looked up from the oldest parent sharing the same 1162a0f6ed8eSJ. Bruce Fields * cl_xprt, and the auth itself references only that common parent 1163a0f6ed8eSJ. Bruce Fields * (which is guaranteed to last as long as any of its descendants). 1164a0f6ed8eSJ. Bruce Fields */ 1165eb6dc19dSTrond Myklebust static struct gss_auth * 116682b98ca5SSargun Dhillon gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args, 1167eb6dc19dSTrond Myklebust struct rpc_clnt *clnt, 1168eb6dc19dSTrond Myklebust struct gss_auth *new) 1169eb6dc19dSTrond Myklebust { 1170eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1171eb6dc19dSTrond Myklebust unsigned long hashval = (unsigned long)clnt; 1172eb6dc19dSTrond Myklebust 1173eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1174eb6dc19dSTrond Myklebust hash_for_each_possible(gss_auth_hash_table, 1175eb6dc19dSTrond Myklebust gss_auth, 1176eb6dc19dSTrond Myklebust hash, 1177eb6dc19dSTrond Myklebust hashval) { 1178a0f6ed8eSJ. Bruce Fields if (gss_auth->client != clnt) 1179a0f6ed8eSJ. Bruce Fields continue; 1180eb6dc19dSTrond Myklebust if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) 1181eb6dc19dSTrond Myklebust continue; 1182eb6dc19dSTrond Myklebust if (gss_auth->target_name != args->target_name) { 1183eb6dc19dSTrond Myklebust if (gss_auth->target_name == NULL) 1184eb6dc19dSTrond Myklebust continue; 1185eb6dc19dSTrond Myklebust if (args->target_name == NULL) 1186eb6dc19dSTrond Myklebust continue; 1187eb6dc19dSTrond Myklebust if (strcmp(gss_auth->target_name, args->target_name)) 1188eb6dc19dSTrond Myklebust continue; 1189eb6dc19dSTrond Myklebust } 1190331bc71cSTrond Myklebust if (!refcount_inc_not_zero(&gss_auth->rpc_auth.au_count)) 1191eb6dc19dSTrond Myklebust continue; 1192eb6dc19dSTrond Myklebust goto out; 1193eb6dc19dSTrond Myklebust } 1194eb6dc19dSTrond Myklebust if (new) 1195eb6dc19dSTrond Myklebust hash_add(gss_auth_hash_table, &new->hash, hashval); 1196eb6dc19dSTrond Myklebust gss_auth = new; 1197eb6dc19dSTrond Myklebust out: 1198eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1199eb6dc19dSTrond Myklebust return gss_auth; 1200eb6dc19dSTrond Myklebust } 1201eb6dc19dSTrond Myklebust 1202eb6dc19dSTrond Myklebust static struct gss_auth * 120382b98ca5SSargun Dhillon gss_create_hashed(const struct rpc_auth_create_args *args, 120482b98ca5SSargun Dhillon struct rpc_clnt *clnt) 1205eb6dc19dSTrond Myklebust { 1206eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1207eb6dc19dSTrond Myklebust struct gss_auth *new; 1208eb6dc19dSTrond Myklebust 1209eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); 1210eb6dc19dSTrond Myklebust if (gss_auth != NULL) 1211eb6dc19dSTrond Myklebust goto out; 1212eb6dc19dSTrond Myklebust new = gss_create_new(args, clnt); 1213eb6dc19dSTrond Myklebust if (IS_ERR(new)) 1214eb6dc19dSTrond Myklebust return new; 1215eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); 1216eb6dc19dSTrond Myklebust if (gss_auth != new) 1217eb6dc19dSTrond Myklebust gss_destroy(&new->rpc_auth); 1218eb6dc19dSTrond Myklebust out: 1219eb6dc19dSTrond Myklebust return gss_auth; 1220eb6dc19dSTrond Myklebust } 1221eb6dc19dSTrond Myklebust 1222eb6dc19dSTrond Myklebust static struct rpc_auth * 122382b98ca5SSargun Dhillon gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1224eb6dc19dSTrond Myklebust { 1225eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1226ad01b2c6STrond Myklebust struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); 1227eb6dc19dSTrond Myklebust 1228eb6dc19dSTrond Myklebust while (clnt != clnt->cl_parent) { 1229eb6dc19dSTrond Myklebust struct rpc_clnt *parent = clnt->cl_parent; 1230eb6dc19dSTrond Myklebust /* Find the original parent for this transport */ 1231ad01b2c6STrond Myklebust if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) 1232eb6dc19dSTrond Myklebust break; 1233eb6dc19dSTrond Myklebust clnt = parent; 1234eb6dc19dSTrond Myklebust } 1235eb6dc19dSTrond Myklebust 1236eb6dc19dSTrond Myklebust gss_auth = gss_create_hashed(args, clnt); 1237eb6dc19dSTrond Myklebust if (IS_ERR(gss_auth)) 1238eb6dc19dSTrond Myklebust return ERR_CAST(gss_auth); 1239eb6dc19dSTrond Myklebust return &gss_auth->rpc_auth; 1240eb6dc19dSTrond Myklebust } 1241eb6dc19dSTrond Myklebust 1242a652a4bcSTrond Myklebust static struct gss_cred * 1243a652a4bcSTrond Myklebust gss_dup_cred(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 1244a652a4bcSTrond Myklebust { 1245a652a4bcSTrond Myklebust struct gss_cred *new; 1246a652a4bcSTrond Myklebust 1247a652a4bcSTrond Myklebust /* Make a copy of the cred so that we can reference count it */ 1248a652a4bcSTrond Myklebust new = kzalloc(sizeof(*gss_cred), GFP_NOIO); 1249a652a4bcSTrond Myklebust if (new) { 1250a652a4bcSTrond Myklebust struct auth_cred acred = { 12518276c902SNeilBrown .cred = gss_cred->gc_base.cr_cred, 1252a652a4bcSTrond Myklebust }; 1253a652a4bcSTrond Myklebust struct gss_cl_ctx *ctx = 1254a652a4bcSTrond Myklebust rcu_dereference_protected(gss_cred->gc_ctx, 1); 1255a652a4bcSTrond Myklebust 1256a652a4bcSTrond Myklebust rpcauth_init_cred(&new->gc_base, &acred, 1257a652a4bcSTrond Myklebust &gss_auth->rpc_auth, 1258a652a4bcSTrond Myklebust &gss_nullops); 1259a652a4bcSTrond Myklebust new->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE; 1260a652a4bcSTrond Myklebust new->gc_service = gss_cred->gc_service; 1261a652a4bcSTrond Myklebust new->gc_principal = gss_cred->gc_principal; 1262a652a4bcSTrond Myklebust kref_get(&gss_auth->kref); 1263a652a4bcSTrond Myklebust rcu_assign_pointer(new->gc_ctx, ctx); 1264a652a4bcSTrond Myklebust gss_get_ctx(ctx); 1265a652a4bcSTrond Myklebust } 1266a652a4bcSTrond Myklebust return new; 1267a652a4bcSTrond Myklebust } 1268a652a4bcSTrond Myklebust 12690df7fb74STrond Myklebust /* 1270a652a4bcSTrond Myklebust * gss_send_destroy_context will cause the RPCSEC_GSS to send a NULL RPC call 12710df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 12720df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 12730df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 12740df7fb74STrond Myklebust */ 1275a652a4bcSTrond Myklebust static void 1276a652a4bcSTrond Myklebust gss_send_destroy_context(struct rpc_cred *cred) 12770df7fb74STrond Myklebust { 12780df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12790df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1280c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 1281a652a4bcSTrond Myklebust struct gss_cred *new; 12820df7fb74STrond Myklebust struct rpc_task *task; 12830df7fb74STrond Myklebust 1284a652a4bcSTrond Myklebust new = gss_dup_cred(gss_auth, gss_cred); 1285a652a4bcSTrond Myklebust if (new) { 1286c5e6aecdSJeff Layton ctx->gc_proc = RPC_GSS_PROC_DESTROY; 12870df7fb74STrond Myklebust 1288a652a4bcSTrond Myklebust task = rpc_call_null(gss_auth->client, &new->gc_base, 1289a652a4bcSTrond Myklebust RPC_TASK_ASYNC|RPC_TASK_SOFT); 12900df7fb74STrond Myklebust if (!IS_ERR(task)) 12910df7fb74STrond Myklebust rpc_put_task(task); 12920df7fb74STrond Myklebust 1293a652a4bcSTrond Myklebust put_rpccred(&new->gc_base); 1294a652a4bcSTrond Myklebust } 12950df7fb74STrond Myklebust } 12960df7fb74STrond Myklebust 12970df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 12981da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 12991da177e4SLinus Torvalds * allocated before freeing them. */ 13001da177e4SLinus Torvalds static void 13015d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 13021da177e4SLinus Torvalds { 1303632f0d05SChuck Lever dprintk("RPC: %s\n", __func__); 13041da177e4SLinus Torvalds 13050d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 13061da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 13072004c726SJeff Layton kfree(ctx->gc_acceptor.data); 13081da177e4SLinus Torvalds kfree(ctx); 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds static void 13125d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 13135d28dc82STrond Myklebust { 13145d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 13155d28dc82STrond Myklebust gss_do_free_ctx(ctx); 13165d28dc82STrond Myklebust } 13175d28dc82STrond Myklebust 13185d28dc82STrond Myklebust static void 13195d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 13205d28dc82STrond Myklebust { 13215d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 13225d28dc82STrond Myklebust } 13235d28dc82STrond Myklebust 13245d28dc82STrond Myklebust static void 132531be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 13261da177e4SLinus Torvalds { 1327632f0d05SChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 132831be5bf1STrond Myklebust kfree(gss_cred); 132931be5bf1STrond Myklebust } 13301da177e4SLinus Torvalds 133131be5bf1STrond Myklebust static void 133231be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 133331be5bf1STrond Myklebust { 133431be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 133531be5bf1STrond Myklebust gss_free_cred(gss_cred); 133631be5bf1STrond Myklebust } 13371da177e4SLinus Torvalds 133831be5bf1STrond Myklebust static void 13396dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 134031be5bf1STrond Myklebust { 13415d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 13420285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1343c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 13445d28dc82STrond Myklebust 1345a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 134697f68c6bSNeilBrown put_cred(cred->cr_cred); 134731be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 13485d28dc82STrond Myklebust if (ctx) 13495d28dc82STrond Myklebust gss_put_ctx(ctx); 13509eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds 13536dcd3926SJeff Layton static void 13546dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 13556dcd3926SJeff Layton { 13566dcd3926SJeff Layton 1357a652a4bcSTrond Myklebust if (test_and_clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) 1358a652a4bcSTrond Myklebust gss_send_destroy_context(cred); 13596dcd3926SJeff Layton gss_destroy_nullcred(cred); 13606dcd3926SJeff Layton } 13616dcd3926SJeff Layton 1362a960f8d6SFrank Sorenson static int 1363a960f8d6SFrank Sorenson gss_hash_cred(struct auth_cred *acred, unsigned int hashbits) 1364a960f8d6SFrank Sorenson { 13658276c902SNeilBrown return hash_64(from_kuid(&init_user_ns, acred->cred->fsuid), hashbits); 1366a960f8d6SFrank Sorenson } 1367a960f8d6SFrank Sorenson 13681da177e4SLinus Torvalds /* 13691da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 13701da177e4SLinus Torvalds */ 13711da177e4SLinus Torvalds static struct rpc_cred * 13728a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 13731da177e4SLinus Torvalds { 13743c6e0bc8SJeff Layton return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds static struct rpc_cred * 13783c6e0bc8SJeff Layton gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) 13791da177e4SLinus Torvalds { 13801da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 13811da177e4SLinus Torvalds struct gss_cred *cred = NULL; 13821da177e4SLinus Torvalds int err = -ENOMEM; 13831da177e4SLinus Torvalds 1384632f0d05SChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 13858276c902SNeilBrown __func__, from_kuid(&init_user_ns, acred->cred->fsuid), 1386cdba321eSEric W. Biederman auth->au_flavor); 13871da177e4SLinus Torvalds 13883c6e0bc8SJeff Layton if (!(cred = kzalloc(sizeof(*cred), gfp))) 13891da177e4SLinus Torvalds goto out_err; 13901da177e4SLinus Torvalds 13915fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 13921da177e4SLinus Torvalds /* 13931da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 13941da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 13951da177e4SLinus Torvalds */ 1396fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 13971da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 139868c97153STrond Myklebust cred->gc_principal = acred->principal; 13990285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 14001da177e4SLinus Torvalds return &cred->gc_base; 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds out_err: 1403632f0d05SChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 14041da177e4SLinus Torvalds return ERR_PTR(err); 14051da177e4SLinus Torvalds } 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds static int 1408fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1409fba3bad4STrond Myklebust { 1410fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1411fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1412fba3bad4STrond Myklebust int err; 1413fba3bad4STrond Myklebust 1414fba3bad4STrond Myklebust do { 1415fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1416fba3bad4STrond Myklebust } while (err == -EAGAIN); 1417fba3bad4STrond Myklebust return err; 1418fba3bad4STrond Myklebust } 1419fba3bad4STrond Myklebust 1420a0337d1dSJeff Layton static char * 1421a0337d1dSJeff Layton gss_stringify_acceptor(struct rpc_cred *cred) 1422a0337d1dSJeff Layton { 1423c5e6aecdSJeff Layton char *string = NULL; 1424a0337d1dSJeff Layton struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1425c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1426b3ecba09SJeff Layton unsigned int len; 1427c5e6aecdSJeff Layton struct xdr_netobj *acceptor; 1428c5e6aecdSJeff Layton 1429c5e6aecdSJeff Layton rcu_read_lock(); 1430c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1431c5e6aecdSJeff Layton if (!ctx) 1432c5e6aecdSJeff Layton goto out; 1433c5e6aecdSJeff Layton 1434b3ecba09SJeff Layton len = ctx->gc_acceptor.len; 1435b3ecba09SJeff Layton rcu_read_unlock(); 1436a0337d1dSJeff Layton 1437a0337d1dSJeff Layton /* no point if there's no string */ 1438b3ecba09SJeff Layton if (!len) 1439b3ecba09SJeff Layton return NULL; 1440b3ecba09SJeff Layton realloc: 1441b3ecba09SJeff Layton string = kmalloc(len + 1, GFP_KERNEL); 1442a0337d1dSJeff Layton if (!string) 1443b3ecba09SJeff Layton return NULL; 1444b3ecba09SJeff Layton 1445b3ecba09SJeff Layton rcu_read_lock(); 1446b3ecba09SJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1447b3ecba09SJeff Layton 1448b3ecba09SJeff Layton /* did the ctx disappear or was it replaced by one with no acceptor? */ 1449b3ecba09SJeff Layton if (!ctx || !ctx->gc_acceptor.len) { 1450b3ecba09SJeff Layton kfree(string); 1451b3ecba09SJeff Layton string = NULL; 1452c5e6aecdSJeff Layton goto out; 1453b3ecba09SJeff Layton } 1454b3ecba09SJeff Layton 1455b3ecba09SJeff Layton acceptor = &ctx->gc_acceptor; 1456b3ecba09SJeff Layton 1457b3ecba09SJeff Layton /* 1458b3ecba09SJeff Layton * Did we find a new acceptor that's longer than the original? Allocate 1459b3ecba09SJeff Layton * a longer buffer and try again. 1460b3ecba09SJeff Layton */ 1461b3ecba09SJeff Layton if (len < acceptor->len) { 1462b3ecba09SJeff Layton len = acceptor->len; 1463b3ecba09SJeff Layton rcu_read_unlock(); 1464b3ecba09SJeff Layton kfree(string); 1465b3ecba09SJeff Layton goto realloc; 1466b3ecba09SJeff Layton } 1467a0337d1dSJeff Layton 1468a0337d1dSJeff Layton memcpy(string, acceptor->data, acceptor->len); 1469a0337d1dSJeff Layton string[acceptor->len] = '\0'; 1470c5e6aecdSJeff Layton out: 1471c5e6aecdSJeff Layton rcu_read_unlock(); 1472a0337d1dSJeff Layton return string; 1473a0337d1dSJeff Layton } 1474a0337d1dSJeff Layton 14754de6caa2SAndy Adamson /* 14764de6caa2SAndy Adamson * Returns -EACCES if GSS context is NULL or will expire within the 14774de6caa2SAndy Adamson * timeout (miliseconds) 14784de6caa2SAndy Adamson */ 14794de6caa2SAndy Adamson static int 14804de6caa2SAndy Adamson gss_key_timeout(struct rpc_cred *rc) 14814de6caa2SAndy Adamson { 14824de6caa2SAndy Adamson struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1483c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1484cc6a7aabSArnd Bergmann unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); 1485cc6a7aabSArnd Bergmann int ret = 0; 14864de6caa2SAndy Adamson 1487c5e6aecdSJeff Layton rcu_read_lock(); 1488c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1489cc6a7aabSArnd Bergmann if (!ctx || time_after(timeout, ctx->gc_expiry)) 1490cc6a7aabSArnd Bergmann ret = -EACCES; 1491c5e6aecdSJeff Layton rcu_read_unlock(); 1492cc6a7aabSArnd Bergmann 1493cc6a7aabSArnd Bergmann return ret; 14944de6caa2SAndy Adamson } 14954de6caa2SAndy Adamson 1496fba3bad4STrond Myklebust static int 14978a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 14981da177e4SLinus Torvalds { 14991da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1500c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 15014de6caa2SAndy Adamson int ret; 15021da177e4SLinus Torvalds 1503cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 15048a317760STrond Myklebust goto out; 15051da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1506c5e6aecdSJeff Layton rcu_read_lock(); 1507c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1508c5e6aecdSJeff Layton if (!ctx || time_after(jiffies, ctx->gc_expiry)) { 1509c5e6aecdSJeff Layton rcu_read_unlock(); 1510cd019f75STrond Myklebust return 0; 1511c5e6aecdSJeff Layton } 1512c5e6aecdSJeff Layton rcu_read_unlock(); 1513cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 15141da177e4SLinus Torvalds return 0; 15158a317760STrond Myklebust out: 151668c97153STrond Myklebust if (acred->principal != NULL) { 151768c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 151868c97153STrond Myklebust return 0; 15194de6caa2SAndy Adamson ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; 1520ddf529eeSNeilBrown } else { 152168c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 15227c67db3aSTrond Myklebust return 0; 152304d1532bSNeilBrown ret = uid_eq(rc->cr_cred->fsuid, acred->cred->fsuid); 15244de6caa2SAndy Adamson } 15254de6caa2SAndy Adamson return ret; 15261da177e4SLinus Torvalds } 15271da177e4SLinus Torvalds 15281da177e4SLinus Torvalds /* 15291da177e4SLinus Torvalds * Marshal credentials. 15301da177e4SLinus Torvalds * Maybe we should keep a cached credential for performance reasons. 15311da177e4SLinus Torvalds */ 1532d8ed029dSAlexey Dobriyan static __be32 * 1533d8ed029dSAlexey Dobriyan gss_marshal(struct rpc_task *task, __be32 *p) 15341da177e4SLinus Torvalds { 1535a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1536a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 15371da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15381da177e4SLinus Torvalds gc_base); 15391da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1540d8ed029dSAlexey Dobriyan __be32 *cred_len; 15411da177e4SLinus Torvalds u32 maj_stat = 0; 15421da177e4SLinus Torvalds struct xdr_netobj mic; 15431da177e4SLinus Torvalds struct kvec iov; 15441da177e4SLinus Torvalds struct xdr_buf verf_buf; 15451da177e4SLinus Torvalds 1546632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 15491da177e4SLinus Torvalds cred_len = p++; 15501da177e4SLinus Torvalds 15511da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 155297b78ae9STrond Myklebust req->rq_seqno = (ctx->gc_seq < MAXSEQ) ? ctx->gc_seq++ : MAXSEQ; 15531da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 155497b78ae9STrond Myklebust if (req->rq_seqno == MAXSEQ) 155597b78ae9STrond Myklebust goto out_expired; 15561da177e4SLinus Torvalds 15571da177e4SLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 15581da177e4SLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 15591da177e4SLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 15601da177e4SLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 15611da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 15621da177e4SLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 15631da177e4SLinus Torvalds 15641da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 15651da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1566067fb11bSChuck Lever iov.iov_base = req->rq_snd_buf.head[0].iov_base; 15671da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 15681da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds /* set verifier flavor*/ 15711da177e4SLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 157400fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 15751da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 157697b78ae9STrond Myklebust goto out_expired; 15771da177e4SLinus Torvalds } else if (maj_stat != 0) { 157897b78ae9STrond Myklebust pr_warn("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 157997b78ae9STrond Myklebust task->tk_status = -EIO; 15801da177e4SLinus Torvalds goto out_put_ctx; 15811da177e4SLinus Torvalds } 15821da177e4SLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 15831da177e4SLinus Torvalds gss_put_ctx(ctx); 15841da177e4SLinus Torvalds return p; 158597b78ae9STrond Myklebust out_expired: 158697b78ae9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 158797b78ae9STrond Myklebust task->tk_status = -EKEYEXPIRED; 15881da177e4SLinus Torvalds out_put_ctx: 15891da177e4SLinus Torvalds gss_put_ctx(ctx); 15901da177e4SLinus Torvalds return NULL; 15911da177e4SLinus Torvalds } 15921da177e4SLinus Torvalds 1593cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1594cd019f75STrond Myklebust { 1595a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1596cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1597cd019f75STrond Myklebust struct gss_cred, 1598cd019f75STrond Myklebust gc_base); 1599cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1600cd019f75STrond Myklebust struct auth_cred acred = { 160197f68c6bSNeilBrown .cred = oldcred->cr_cred, 160268c97153STrond Myklebust .principal = gss_cred->gc_principal, 1603cd019f75STrond Myklebust }; 1604cd019f75STrond Myklebust struct rpc_cred *new; 1605cd019f75STrond Myklebust 1606cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1607cd019f75STrond Myklebust if (IS_ERR(new)) 1608cd019f75STrond Myklebust return PTR_ERR(new); 1609a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1610cd019f75STrond Myklebust put_rpccred(oldcred); 1611cd019f75STrond Myklebust return 0; 1612cd019f75STrond Myklebust } 1613cd019f75STrond Myklebust 1614126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1615126e216aSTrond Myklebust { 1616126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1617126e216aSTrond Myklebust unsigned long now = jiffies; 1618126e216aSTrond Myklebust unsigned long begin, expire; 1619126e216aSTrond Myklebust struct gss_cred *gss_cred; 1620126e216aSTrond Myklebust 1621126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1622126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1623126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1624126e216aSTrond Myklebust 1625126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1626126e216aSTrond Myklebust return 1; 1627126e216aSTrond Myklebust } 1628126e216aSTrond Myklebust return 0; 1629126e216aSTrond Myklebust } 1630126e216aSTrond Myklebust 16311da177e4SLinus Torvalds /* 16321da177e4SLinus Torvalds * Refresh credentials. XXX - finish 16331da177e4SLinus Torvalds */ 16341da177e4SLinus Torvalds static int 16351da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 16361da177e4SLinus Torvalds { 1637a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1638cd019f75STrond Myklebust int ret = 0; 16391da177e4SLinus Torvalds 1640126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1641126e216aSTrond Myklebust return -EKEYEXPIRED; 1642126e216aSTrond Myklebust 1643cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1644cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1645cd019f75STrond Myklebust ret = gss_renew_cred(task); 1646cd019f75STrond Myklebust if (ret < 0) 1647cd019f75STrond Myklebust goto out; 1648a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1649cd019f75STrond Myklebust } 1650cd019f75STrond Myklebust 1651cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1652cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1653cd019f75STrond Myklebust out: 1654cd019f75STrond Myklebust return ret; 16551da177e4SLinus Torvalds } 16561da177e4SLinus Torvalds 16570df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 16580df7fb74STrond Myklebust static int 16590df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 16600df7fb74STrond Myklebust { 1661c297c8b9SAndy Adamson return 0; 16620df7fb74STrond Myklebust } 16630df7fb74STrond Myklebust 1664d8ed029dSAlexey Dobriyan static __be32 * 1665d8ed029dSAlexey Dobriyan gss_validate(struct rpc_task *task, __be32 *p) 16661da177e4SLinus Torvalds { 1667a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16681da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 16692876a344SJ. Bruce Fields __be32 *seq = NULL; 16701da177e4SLinus Torvalds struct kvec iov; 16711da177e4SLinus Torvalds struct xdr_buf verf_buf; 16721da177e4SLinus Torvalds struct xdr_netobj mic; 16731da177e4SLinus Torvalds u32 flav,len; 16741da177e4SLinus Torvalds u32 maj_stat; 167535fa5f7bSAndy Adamson __be32 *ret = ERR_PTR(-EIO); 16761da177e4SLinus Torvalds 1677632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 16781da177e4SLinus Torvalds 16791da177e4SLinus Torvalds flav = ntohl(*p++); 16801da177e4SLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 16811da177e4SLinus Torvalds goto out_bad; 16821da177e4SLinus Torvalds if (flav != RPC_AUTH_GSS) 16831da177e4SLinus Torvalds goto out_bad; 16842876a344SJ. Bruce Fields seq = kmalloc(4, GFP_NOFS); 16852876a344SJ. Bruce Fields if (!seq) 16862876a344SJ. Bruce Fields goto out_bad; 16872876a344SJ. Bruce Fields *seq = htonl(task->tk_rqstp->rq_seqno); 16882876a344SJ. Bruce Fields iov.iov_base = seq; 16892876a344SJ. Bruce Fields iov.iov_len = 4; 16901da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 16911da177e4SLinus Torvalds mic.data = (u8 *)p; 16921da177e4SLinus Torvalds mic.len = len; 16931da177e4SLinus Torvalds 169435fa5f7bSAndy Adamson ret = ERR_PTR(-EACCES); 169500fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 16961da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1697fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 16980df7fb74STrond Myklebust if (maj_stat) { 1699632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1700632f0d05SChuck Lever task->tk_pid, __func__, maj_stat); 17011da177e4SLinus Torvalds goto out_bad; 17020df7fb74STrond Myklebust } 170324b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 170424b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 17051be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 17061da177e4SLinus Torvalds gss_put_ctx(ctx); 1707632f0d05SChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1708632f0d05SChuck Lever task->tk_pid, __func__); 17092876a344SJ. Bruce Fields kfree(seq); 17101da177e4SLinus Torvalds return p + XDR_QUADLEN(len); 17111da177e4SLinus Torvalds out_bad: 17121da177e4SLinus Torvalds gss_put_ctx(ctx); 171335fa5f7bSAndy Adamson dprintk("RPC: %5u %s failed ret %ld.\n", task->tk_pid, __func__, 171435fa5f7bSAndy Adamson PTR_ERR(ret)); 17152876a344SJ. Bruce Fields kfree(seq); 171635fa5f7bSAndy Adamson return ret; 17171da177e4SLinus Torvalds } 17181da177e4SLinus Torvalds 17199f06c719SChuck Lever static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 17209f06c719SChuck Lever __be32 *p, void *obj) 17219f06c719SChuck Lever { 17229f06c719SChuck Lever struct xdr_stream xdr; 17239f06c719SChuck Lever 17240ccc61b1SChuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p, rqstp); 17259f06c719SChuck Lever encode(rqstp, &xdr, obj); 17269f06c719SChuck Lever } 17279f06c719SChuck Lever 17281da177e4SLinus Torvalds static inline int 17291da177e4SLinus Torvalds gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 17309f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 17319f06c719SChuck Lever __be32 *p, void *obj) 17321da177e4SLinus Torvalds { 17331da177e4SLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17341da177e4SLinus Torvalds struct xdr_buf integ_buf; 1735d8ed029dSAlexey Dobriyan __be32 *integ_len = NULL; 17361da177e4SLinus Torvalds struct xdr_netobj mic; 1737d8ed029dSAlexey Dobriyan u32 offset; 1738d8ed029dSAlexey Dobriyan __be32 *q; 17391da177e4SLinus Torvalds struct kvec *iov; 17401da177e4SLinus Torvalds u32 maj_stat = 0; 17411da177e4SLinus Torvalds int status = -EIO; 17421da177e4SLinus Torvalds 17431da177e4SLinus Torvalds integ_len = p++; 17441da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17451da177e4SLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 17461da177e4SLinus Torvalds 17479f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 17481da177e4SLinus Torvalds 17491da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 17501da177e4SLinus Torvalds offset, snd_buf->len - offset)) 17511da177e4SLinus Torvalds return status; 17521da177e4SLinus Torvalds *integ_len = htonl(integ_buf.len); 17531da177e4SLinus Torvalds 17541da177e4SLinus Torvalds /* guess whether we're in the head or the tail: */ 17551da177e4SLinus Torvalds if (snd_buf->page_len || snd_buf->tail[0].iov_len) 17561da177e4SLinus Torvalds iov = snd_buf->tail; 17571da177e4SLinus Torvalds else 17581da177e4SLinus Torvalds iov = snd_buf->head; 17591da177e4SLinus Torvalds p = iov->iov_base + iov->iov_len; 17601da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 17611da177e4SLinus Torvalds 176200fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 17631da177e4SLinus Torvalds status = -EIO; /* XXX? */ 17641da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1765fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 17661da177e4SLinus Torvalds else if (maj_stat) 17671da177e4SLinus Torvalds return status; 17681da177e4SLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 17691da177e4SLinus Torvalds 17701da177e4SLinus Torvalds offset = (u8 *)q - (u8 *)p; 17711da177e4SLinus Torvalds iov->iov_len += offset; 17721da177e4SLinus Torvalds snd_buf->len += offset; 17731da177e4SLinus Torvalds return 0; 17741da177e4SLinus Torvalds } 17751da177e4SLinus Torvalds 17762d2da60cSJ. Bruce Fields static void 17772d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 17782d2da60cSJ. Bruce Fields { 17792d2da60cSJ. Bruce Fields int i; 17802d2da60cSJ. Bruce Fields 17812d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 17822d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 17832d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 17848dae5398SChuck Lever rqstp->rq_release_snd_buf = NULL; 17852d2da60cSJ. Bruce Fields } 17862d2da60cSJ. Bruce Fields 17872d2da60cSJ. Bruce Fields static int 17882d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 17892d2da60cSJ. Bruce Fields { 17902d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17912d2da60cSJ. Bruce Fields int first, last, i; 17922d2da60cSJ. Bruce Fields 17938dae5398SChuck Lever if (rqstp->rq_release_snd_buf) 17948dae5398SChuck Lever rqstp->rq_release_snd_buf(rqstp); 17958dae5398SChuck Lever 17962d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 17972d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 17982d2da60cSJ. Bruce Fields return 0; 17992d2da60cSJ. Bruce Fields } 18002d2da60cSJ. Bruce Fields 180109cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 180209cbfeafSKirill A. Shutemov last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; 18032d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 18042d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 18056da2ec56SKees Cook = kmalloc_array(rqstp->rq_enc_pages_num, 18066da2ec56SKees Cook sizeof(struct page *), 18072d2da60cSJ. Bruce Fields GFP_NOFS); 18082d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 18092d2da60cSJ. Bruce Fields goto out; 18102d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 18112d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 18122d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 18132d2da60cSJ. Bruce Fields goto out_free; 18142d2da60cSJ. Bruce Fields } 18152d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 18162d2da60cSJ. Bruce Fields return 0; 18172d2da60cSJ. Bruce Fields out_free: 1818cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1819cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 18202d2da60cSJ. Bruce Fields out: 18212d2da60cSJ. Bruce Fields return -EAGAIN; 18222d2da60cSJ. Bruce Fields } 18232d2da60cSJ. Bruce Fields 18242d2da60cSJ. Bruce Fields static inline int 18252d2da60cSJ. Bruce Fields gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 18269f06c719SChuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 18279f06c719SChuck Lever __be32 *p, void *obj) 18282d2da60cSJ. Bruce Fields { 18292d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 18302d2da60cSJ. Bruce Fields u32 offset; 18312d2da60cSJ. Bruce Fields u32 maj_stat; 18322d2da60cSJ. Bruce Fields int status; 1833d8ed029dSAlexey Dobriyan __be32 *opaque_len; 18342d2da60cSJ. Bruce Fields struct page **inpages; 18352d2da60cSJ. Bruce Fields int first; 18362d2da60cSJ. Bruce Fields int pad; 18372d2da60cSJ. Bruce Fields struct kvec *iov; 18382d2da60cSJ. Bruce Fields char *tmp; 18392d2da60cSJ. Bruce Fields 18402d2da60cSJ. Bruce Fields opaque_len = p++; 18412d2da60cSJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 18422d2da60cSJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 18432d2da60cSJ. Bruce Fields 18449f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 18452d2da60cSJ. Bruce Fields 18462d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 18472d2da60cSJ. Bruce Fields if (status) 18482d2da60cSJ. Bruce Fields return status; 184909cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 18502d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 18512d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 185209cbfeafSKirill A. Shutemov snd_buf->page_base -= first << PAGE_SHIFT; 18537561042fSKevin Coffman /* 18547561042fSKevin Coffman * Give the tail its own page, in case we need extra space in the 18557561042fSKevin Coffman * head when wrapping: 18567561042fSKevin Coffman * 18577561042fSKevin Coffman * call_allocate() allocates twice the slack space required 18587561042fSKevin Coffman * by the authentication flavor to rq_callsize. 18597561042fSKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 18607561042fSKevin Coffman */ 18612d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 18622d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 18632d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 18642d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 18652d2da60cSJ. Bruce Fields } 186600fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 18677561042fSKevin Coffman /* slack space should prevent this ever happening: */ 18682d2da60cSJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 18692d2da60cSJ. Bruce Fields status = -EIO; 18702d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 18712d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 18722d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1873fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18742d2da60cSJ. Bruce Fields else if (maj_stat) 18752d2da60cSJ. Bruce Fields return status; 18762d2da60cSJ. Bruce Fields 18772d2da60cSJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 18782d2da60cSJ. Bruce Fields /* guess whether we're in the head or the tail: */ 18792d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 18802d2da60cSJ. Bruce Fields iov = snd_buf->tail; 18812d2da60cSJ. Bruce Fields else 18822d2da60cSJ. Bruce Fields iov = snd_buf->head; 18832d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 18842d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 18852d2da60cSJ. Bruce Fields memset(p, 0, pad); 18862d2da60cSJ. Bruce Fields iov->iov_len += pad; 18872d2da60cSJ. Bruce Fields snd_buf->len += pad; 18882d2da60cSJ. Bruce Fields 18892d2da60cSJ. Bruce Fields return 0; 18902d2da60cSJ. Bruce Fields } 18912d2da60cSJ. Bruce Fields 18921da177e4SLinus Torvalds static int 18931da177e4SLinus Torvalds gss_wrap_req(struct rpc_task *task, 18949f06c719SChuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 18951da177e4SLinus Torvalds { 1896a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 18971da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 18981da177e4SLinus Torvalds gc_base); 18991da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 19001da177e4SLinus Torvalds int status = -EIO; 19011da177e4SLinus Torvalds 1902632f0d05SChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 19031da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 19041da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 19051da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 19061da177e4SLinus Torvalds */ 19079f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 19089f06c719SChuck Lever status = 0; 19091da177e4SLinus Torvalds goto out; 19101da177e4SLinus Torvalds } 19111da177e4SLinus Torvalds switch (gss_cred->gc_service) { 19121da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 19139f06c719SChuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 19149f06c719SChuck Lever status = 0; 19151da177e4SLinus Torvalds break; 19161da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 191789f0e4feSJoe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 19181da177e4SLinus Torvalds break; 19191da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 192089f0e4feSJoe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 19211da177e4SLinus Torvalds break; 19221da177e4SLinus Torvalds } 19231da177e4SLinus Torvalds out: 19241da177e4SLinus Torvalds gss_put_ctx(ctx); 1925632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 19261da177e4SLinus Torvalds return status; 19271da177e4SLinus Torvalds } 19281da177e4SLinus Torvalds 19291da177e4SLinus Torvalds static inline int 19301da177e4SLinus Torvalds gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1931d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 19321da177e4SLinus Torvalds { 19331da177e4SLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 19341da177e4SLinus Torvalds struct xdr_buf integ_buf; 19351da177e4SLinus Torvalds struct xdr_netobj mic; 19361da177e4SLinus Torvalds u32 data_offset, mic_offset; 19371da177e4SLinus Torvalds u32 integ_len; 19381da177e4SLinus Torvalds u32 maj_stat; 19391da177e4SLinus Torvalds int status = -EIO; 19401da177e4SLinus Torvalds 19411da177e4SLinus Torvalds integ_len = ntohl(*(*p)++); 19421da177e4SLinus Torvalds if (integ_len & 3) 19431da177e4SLinus Torvalds return status; 19441da177e4SLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 19451da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 19461da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 19471da177e4SLinus Torvalds return status; 19481da177e4SLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 19491da177e4SLinus Torvalds return status; 19501da177e4SLinus Torvalds 19511da177e4SLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 19521da177e4SLinus Torvalds mic_offset - data_offset)) 19531da177e4SLinus Torvalds return status; 19541da177e4SLinus Torvalds 19551da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 19561da177e4SLinus Torvalds return status; 19571da177e4SLinus Torvalds 195800fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 19591da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1960fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19611da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 19621da177e4SLinus Torvalds return status; 19631da177e4SLinus Torvalds return 0; 19641da177e4SLinus Torvalds } 19651da177e4SLinus Torvalds 19662d2da60cSJ. Bruce Fields static inline int 19672d2da60cSJ. Bruce Fields gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1968d8ed029dSAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 19692d2da60cSJ. Bruce Fields { 19702d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 19712d2da60cSJ. Bruce Fields u32 offset; 19722d2da60cSJ. Bruce Fields u32 opaque_len; 19732d2da60cSJ. Bruce Fields u32 maj_stat; 19742d2da60cSJ. Bruce Fields int status = -EIO; 19752d2da60cSJ. Bruce Fields 19762d2da60cSJ. Bruce Fields opaque_len = ntohl(*(*p)++); 19772d2da60cSJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 19782d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 19792d2da60cSJ. Bruce Fields return status; 19802d2da60cSJ. Bruce Fields /* remove padding: */ 19812d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 19822d2da60cSJ. Bruce Fields 198300fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 19842d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1985fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19862d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 19872d2da60cSJ. Bruce Fields return status; 19882d2da60cSJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 19892d2da60cSJ. Bruce Fields return status; 19902d2da60cSJ. Bruce Fields 19912d2da60cSJ. Bruce Fields return 0; 19922d2da60cSJ. Bruce Fields } 19932d2da60cSJ. Bruce Fields 1994bf269551SChuck Lever static int 1995bf269551SChuck Lever gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1996bf269551SChuck Lever __be32 *p, void *obj) 1997bf269551SChuck Lever { 1998bf269551SChuck Lever struct xdr_stream xdr; 1999bf269551SChuck Lever 20000ccc61b1SChuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p, rqstp); 2001bf269551SChuck Lever return decode(rqstp, &xdr, obj); 2002bf269551SChuck Lever } 20032d2da60cSJ. Bruce Fields 20043021a5bbSTrond Myklebust static bool 20053021a5bbSTrond Myklebust gss_seq_is_newer(u32 new, u32 old) 20063021a5bbSTrond Myklebust { 20073021a5bbSTrond Myklebust return (s32)(new - old) > 0; 20083021a5bbSTrond Myklebust } 20093021a5bbSTrond Myklebust 20103021a5bbSTrond Myklebust static bool 20113021a5bbSTrond Myklebust gss_xmit_need_reencode(struct rpc_task *task) 20123021a5bbSTrond Myklebust { 20133021a5bbSTrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 20143021a5bbSTrond Myklebust struct rpc_cred *cred = req->rq_cred; 20153021a5bbSTrond Myklebust struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20163021a5bbSTrond Myklebust u32 win, seq_xmit; 20173021a5bbSTrond Myklebust bool ret = true; 20183021a5bbSTrond Myklebust 20193021a5bbSTrond Myklebust if (!ctx) 20203021a5bbSTrond Myklebust return true; 20213021a5bbSTrond Myklebust 20223021a5bbSTrond Myklebust if (gss_seq_is_newer(req->rq_seqno, READ_ONCE(ctx->gc_seq))) 20233021a5bbSTrond Myklebust goto out; 20243021a5bbSTrond Myklebust 20253021a5bbSTrond Myklebust seq_xmit = READ_ONCE(ctx->gc_seq_xmit); 20263021a5bbSTrond Myklebust while (gss_seq_is_newer(req->rq_seqno, seq_xmit)) { 20273021a5bbSTrond Myklebust u32 tmp = seq_xmit; 20283021a5bbSTrond Myklebust 20293021a5bbSTrond Myklebust seq_xmit = cmpxchg(&ctx->gc_seq_xmit, tmp, req->rq_seqno); 20303021a5bbSTrond Myklebust if (seq_xmit == tmp) { 20313021a5bbSTrond Myklebust ret = false; 20323021a5bbSTrond Myklebust goto out; 20333021a5bbSTrond Myklebust } 20343021a5bbSTrond Myklebust } 20353021a5bbSTrond Myklebust 20363021a5bbSTrond Myklebust win = ctx->gc_win; 20373021a5bbSTrond Myklebust if (win > 0) 20383021a5bbSTrond Myklebust ret = !gss_seq_is_newer(req->rq_seqno, seq_xmit - win); 20393021a5bbSTrond Myklebust out: 20403021a5bbSTrond Myklebust gss_put_ctx(ctx); 20413021a5bbSTrond Myklebust return ret; 20423021a5bbSTrond Myklebust } 20433021a5bbSTrond Myklebust 20441da177e4SLinus Torvalds static int 20451da177e4SLinus Torvalds gss_unwrap_resp(struct rpc_task *task, 2046bf269551SChuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 20471da177e4SLinus Torvalds { 2048a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 20491da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 20501da177e4SLinus Torvalds gc_base); 20511da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 2052d8ed029dSAlexey Dobriyan __be32 *savedp = p; 20532d2da60cSJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 20542d2da60cSJ. Bruce Fields int savedlen = head->iov_len; 20551da177e4SLinus Torvalds int status = -EIO; 20561da177e4SLinus Torvalds 20571da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 20581da177e4SLinus Torvalds goto out_decode; 20591da177e4SLinus Torvalds switch (gss_cred->gc_service) { 20601da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 20611da177e4SLinus Torvalds break; 20621da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 20631da177e4SLinus Torvalds status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 20641da177e4SLinus Torvalds if (status) 20651da177e4SLinus Torvalds goto out; 20661da177e4SLinus Torvalds break; 20671da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 20682d2da60cSJ. Bruce Fields status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 20692d2da60cSJ. Bruce Fields if (status) 20702d2da60cSJ. Bruce Fields goto out; 20711da177e4SLinus Torvalds break; 20721da177e4SLinus Torvalds } 207324b2605bSJ. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 20741be27f36STrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 20752d2da60cSJ. Bruce Fields + (savedlen - head->iov_len); 20761da177e4SLinus Torvalds out_decode: 2077bf269551SChuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 20781da177e4SLinus Torvalds out: 20791da177e4SLinus Torvalds gss_put_ctx(ctx); 2080632f0d05SChuck Lever dprintk("RPC: %5u %s returning %d\n", 2081632f0d05SChuck Lever task->tk_pid, __func__, status); 20821da177e4SLinus Torvalds return status; 20831da177e4SLinus Torvalds } 20841da177e4SLinus Torvalds 2085f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 20861da177e4SLinus Torvalds .owner = THIS_MODULE, 20871da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 20881da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 20891da177e4SLinus Torvalds .create = gss_create, 20901da177e4SLinus Torvalds .destroy = gss_destroy, 2091a960f8d6SFrank Sorenson .hash_cred = gss_hash_cred, 20921da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 209380df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 20946a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 20959568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 2096a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 20971da177e4SLinus Torvalds }; 20981da177e4SLinus Torvalds 2099f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 21001da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 21011da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 2102fba3bad4STrond Myklebust .cr_init = gss_cred_init, 21031da177e4SLinus Torvalds .crmatch = gss_match, 21041da177e4SLinus Torvalds .crmarshal = gss_marshal, 21051da177e4SLinus Torvalds .crrefresh = gss_refresh, 21061da177e4SLinus Torvalds .crvalidate = gss_validate, 21071da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 21081da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 21094de6caa2SAndy Adamson .crkey_timeout = gss_key_timeout, 2110a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21113021a5bbSTrond Myklebust .crneed_reencode = gss_xmit_need_reencode, 21121da177e4SLinus Torvalds }; 21131da177e4SLinus Torvalds 21140df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 21150df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 21166dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 21170df7fb74STrond Myklebust .crmatch = gss_match, 21180df7fb74STrond Myklebust .crmarshal = gss_marshal, 21190df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 21200df7fb74STrond Myklebust .crvalidate = gss_validate, 21210df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 21220df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 2123a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21240df7fb74STrond Myklebust }; 21250df7fb74STrond Myklebust 2126b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 2127c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 21281da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 21291da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 213034769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 213134769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 213234769fc4S\"J. Bruce Fields\ }; 213334769fc4S\"J. Bruce Fields\ 2134b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 2135c1225158SPeng Tao .upcall = rpc_pipe_generic_upcall, 213634769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 213734769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 213834769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 21391da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 21401da177e4SLinus Torvalds }; 21411da177e4SLinus Torvalds 2142a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 2143a1db410dSStanislav Kinsbursky { 2144a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 2145a1db410dSStanislav Kinsbursky } 2146a1db410dSStanislav Kinsbursky 2147a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 2148a1db410dSStanislav Kinsbursky { 2149a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 2150a1db410dSStanislav Kinsbursky } 2151a1db410dSStanislav Kinsbursky 2152a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 2153a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 2154a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 2155a1db410dSStanislav Kinsbursky }; 2156a1db410dSStanislav Kinsbursky 21571da177e4SLinus Torvalds /* 21581da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 21591da177e4SLinus Torvalds */ 21601da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 21611da177e4SLinus Torvalds { 21621da177e4SLinus Torvalds int err = 0; 21631da177e4SLinus Torvalds 21641da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 21651da177e4SLinus Torvalds if (err) 21661da177e4SLinus Torvalds goto out; 21671da177e4SLinus Torvalds err = gss_svc_init(); 21681da177e4SLinus Torvalds if (err) 21691da177e4SLinus Torvalds goto out_unregister; 2170a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 2171a1db410dSStanislav Kinsbursky if (err) 2172a1db410dSStanislav Kinsbursky goto out_svc_exit; 217379a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 21741da177e4SLinus Torvalds return 0; 2175a1db410dSStanislav Kinsbursky out_svc_exit: 2176a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 21771da177e4SLinus Torvalds out_unregister: 21781da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 21791da177e4SLinus Torvalds out: 21801da177e4SLinus Torvalds return err; 21811da177e4SLinus Torvalds } 21821da177e4SLinus Torvalds 21831da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 21841da177e4SLinus Torvalds { 2185a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 21861da177e4SLinus Torvalds gss_svc_shutdown(); 21871da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 2188bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds 219171afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 21921da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2193126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 2194126e216aSTrond Myklebust gss_expired_cred_retry_delay, 2195126e216aSTrond Myklebust uint, 0644); 2196126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 2197126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 2198126e216aSTrond Myklebust 21994de6caa2SAndy Adamson module_param_named(key_expire_timeo, 22004de6caa2SAndy Adamson gss_key_expire_timeo, 22014de6caa2SAndy Adamson uint, 0644); 22024de6caa2SAndy Adamson MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " 22034de6caa2SAndy Adamson "credential keys lifetime where the NFS layer cleans up " 22044de6caa2SAndy Adamson "prior to key expiration"); 22054de6caa2SAndy Adamson 22061da177e4SLinus Torvalds module_init(init_rpcsec_gss) 22071da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 2208