12573a464SChuck Lever // SPDX-License-Identifier: BSD-3-Clause 21da177e4SLinus Torvalds /* 3f30c2269SUwe Zeisberger * linux/net/sunrpc/auth_gss/auth_gss.c 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * RPCSEC_GSS client authentication. 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 81da177e4SLinus Torvalds * All rights reserved. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Dug Song <dugsong@monkey.org> 111da177e4SLinus Torvalds * Andy Adamson <andros@umich.edu> 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/module.h> 151da177e4SLinus Torvalds #include <linux/init.h> 161da177e4SLinus Torvalds #include <linux/types.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/sched.h> 192d2da60cSJ. Bruce Fields #include <linux/pagemap.h> 201da177e4SLinus Torvalds #include <linux/sunrpc/clnt.h> 211da177e4SLinus Torvalds #include <linux/sunrpc/auth.h> 221da177e4SLinus Torvalds #include <linux/sunrpc/auth_gss.h> 231da177e4SLinus Torvalds #include <linux/sunrpc/svcauth_gss.h> 241da177e4SLinus Torvalds #include <linux/sunrpc/gss_err.h> 251da177e4SLinus Torvalds #include <linux/workqueue.h> 261da177e4SLinus Torvalds #include <linux/sunrpc/rpc_pipe_fs.h> 271da177e4SLinus Torvalds #include <linux/sunrpc/gss_api.h> 287c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 29eb6dc19dSTrond Myklebust #include <linux/hashtable.h> 301da177e4SLinus Torvalds 31abfdbd53STrond Myklebust #include "../netns.h" 32abfdbd53STrond Myklebust 330c77668dSChuck Lever #include <trace/events/rpcgss.h> 340c77668dSChuck Lever 35f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops; 361da177e4SLinus Torvalds 37f1c0a861STrond Myklebust static const struct rpc_credops gss_credops; 380df7fb74STrond Myklebust static const struct rpc_credops gss_nullops; 391da177e4SLinus Torvalds 40126e216aSTrond Myklebust #define GSS_RETRY_EXPIRED 5 41126e216aSTrond Myklebust static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 42126e216aSTrond Myklebust 434de6caa2SAndy Adamson #define GSS_KEY_EXPIRE_TIMEO 240 444de6caa2SAndy Adamson static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; 454de6caa2SAndy Adamson 46f895b252SJeff Layton #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) 471da177e4SLinus Torvalds # define RPCDBG_FACILITY RPCDBG_AUTH 481da177e4SLinus Torvalds #endif 491da177e4SLinus Torvalds 50725f2865SKevin Coffman #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 511da177e4SLinus Torvalds /* length of a krb5 verifier (48), plus data added before arguments when 521da177e4SLinus Torvalds * using integrity (two 4-byte integers): */ 53adeb8133SOlga Kornievskaia #define GSS_VERF_SLACK 100 541da177e4SLinus Torvalds 5523c323afSTrond Myklebust static DEFINE_HASHTABLE(gss_auth_hash_table, 4); 56eb6dc19dSTrond Myklebust static DEFINE_SPINLOCK(gss_auth_hash_lock); 57eb6dc19dSTrond Myklebust 5819172284STrond Myklebust struct gss_pipe { 5919172284STrond Myklebust struct rpc_pipe_dir_object pdo; 6019172284STrond Myklebust struct rpc_pipe *pipe; 6119172284STrond Myklebust struct rpc_clnt *clnt; 6219172284STrond Myklebust const char *name; 63414a6295STrond Myklebust struct kref kref; 6419172284STrond Myklebust }; 6519172284STrond Myklebust 661da177e4SLinus Torvalds struct gss_auth { 670285ed1fSTrond Myklebust struct kref kref; 68eb6dc19dSTrond Myklebust struct hlist_node hash; 691da177e4SLinus Torvalds struct rpc_auth rpc_auth; 701da177e4SLinus Torvalds struct gss_api_mech *mech; 711da177e4SLinus Torvalds enum rpc_gss_svc service; 721da177e4SLinus Torvalds struct rpc_clnt *client; 73e726340aSTrond Myklebust struct net *net; 7434769fc4S\"J. Bruce Fields\ /* 7534769fc4S\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 7634769fc4S\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 7734769fc4S\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 7834769fc4S\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 7934769fc4S\"J. Bruce Fields\ */ 8019172284STrond Myklebust struct gss_pipe *gss_pipe[2]; 81bd4a3eb1STrond Myklebust const char *target_name; 821da177e4SLinus Torvalds }; 831da177e4SLinus Torvalds 8479a3f20bS\"J. Bruce Fields\ /* pipe_version >= 0 if and only if someone has a pipe open. */ 8579a3f20bS\"J. Bruce Fields\ static DEFINE_SPINLOCK(pipe_version_lock); 8679a3f20bS\"J. Bruce Fields\ static struct rpc_wait_queue pipe_version_rpc_waitqueue; 8779a3f20bS\"J. Bruce Fields\ static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 889eb2ddb4STrond Myklebust static void gss_put_auth(struct gss_auth *gss_auth); 89cf81939dS\"J. Bruce Fields\ 905d28dc82STrond Myklebust static void gss_free_ctx(struct gss_cl_ctx *); 91b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0; 92b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1; 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds static inline struct gss_cl_ctx * 951da177e4SLinus Torvalds gss_get_ctx(struct gss_cl_ctx *ctx) 961da177e4SLinus Torvalds { 970fa10472SReshetova, Elena refcount_inc(&ctx->count); 981da177e4SLinus Torvalds return ctx; 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static inline void 1021da177e4SLinus Torvalds gss_put_ctx(struct gss_cl_ctx *ctx) 1031da177e4SLinus Torvalds { 1040fa10472SReshetova, Elena if (refcount_dec_and_test(&ctx->count)) 1055d28dc82STrond Myklebust gss_free_ctx(ctx); 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds 1085d28dc82STrond Myklebust /* gss_cred_set_ctx: 1095d28dc82STrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1105d28dc82STrond Myklebust * to set the gss context. The actual exchange of an old context 1119beae467SStanislav Kinsbursky * and a new one is protected by the pipe->lock. 1125d28dc82STrond Myklebust */ 1131da177e4SLinus Torvalds static void 1141da177e4SLinus Torvalds gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1151da177e4SLinus Torvalds { 1161da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1175d28dc82STrond Myklebust 118cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 119cd019f75STrond Myklebust return; 1207b6962b0STrond Myklebust gss_get_ctx(ctx); 121cf778b00SEric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 122fc432dd9STrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1234e857c58SPeter Zijlstra smp_mb__before_atomic(); 124fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds static const void * 1281da177e4SLinus Torvalds simple_get_bytes(const void *p, const void *end, void *res, size_t len) 1291da177e4SLinus Torvalds { 1301da177e4SLinus Torvalds const void *q = (const void *)((const char *)p + len); 1311da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1321da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1331da177e4SLinus Torvalds memcpy(res, p, len); 1341da177e4SLinus Torvalds return q; 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds static inline const void * 1381da177e4SLinus Torvalds simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds const void *q; 1411da177e4SLinus Torvalds unsigned int len; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1441da177e4SLinus Torvalds if (IS_ERR(p)) 1451da177e4SLinus Torvalds return p; 1461da177e4SLinus Torvalds q = (const void *)((const char *)p + len); 1471da177e4SLinus Torvalds if (unlikely(q > end || q < p)) 1481da177e4SLinus Torvalds return ERR_PTR(-EFAULT); 1490f38b873STrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1501da177e4SLinus Torvalds if (unlikely(dest->data == NULL)) 1511da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1521da177e4SLinus Torvalds dest->len = len; 1531da177e4SLinus Torvalds return q; 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds static struct gss_cl_ctx * 1571da177e4SLinus Torvalds gss_cred_get_ctx(struct rpc_cred *cred) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1601da177e4SLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1611da177e4SLinus Torvalds 1625d28dc82STrond Myklebust rcu_read_lock(); 163c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 164c5e6aecdSJeff Layton if (ctx) 165c5e6aecdSJeff Layton gss_get_ctx(ctx); 1665d28dc82STrond Myklebust rcu_read_unlock(); 1671da177e4SLinus Torvalds return ctx; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds static struct gss_cl_ctx * 1711da177e4SLinus Torvalds gss_alloc_context(void) 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 1741da177e4SLinus Torvalds 1750f38b873STrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1761da177e4SLinus Torvalds if (ctx != NULL) { 1771da177e4SLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1781da177e4SLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1791da177e4SLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1800fa10472SReshetova, Elena refcount_set(&ctx->count,1); 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds return ctx; 1831da177e4SLinus Torvalds } 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds #define GSSD_MIN_TIMEOUT (60 * 60) 1861da177e4SLinus Torvalds static const void * 1871da177e4SLinus Torvalds gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1881da177e4SLinus Torvalds { 1891da177e4SLinus Torvalds const void *q; 1901da177e4SLinus Torvalds unsigned int seclen; 1911da177e4SLinus Torvalds unsigned int timeout; 192620038f6SAndy Adamson unsigned long now = jiffies; 1931da177e4SLinus Torvalds u32 window_size; 1941da177e4SLinus Torvalds int ret; 1951da177e4SLinus Torvalds 196620038f6SAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 197620038f6SAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 198620038f6SAndy Adamson * the -t value passed to GSSD. 199620038f6SAndy Adamson */ 2001da177e4SLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2011da177e4SLinus Torvalds if (IS_ERR(p)) 2021da177e4SLinus Torvalds goto err; 2031da177e4SLinus Torvalds if (timeout == 0) 2041da177e4SLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 205620038f6SAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 206620038f6SAndy Adamson /* Sequence number window. Determines the maximum number of 207620038f6SAndy Adamson * simultaneous requests 208620038f6SAndy Adamson */ 2091da177e4SLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2101da177e4SLinus Torvalds if (IS_ERR(p)) 2111da177e4SLinus Torvalds goto err; 2121da177e4SLinus Torvalds ctx->gc_win = window_size; 2131da177e4SLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2141da177e4SLinus Torvalds if (ctx->gc_win == 0) { 215dc5ddce9SJeff Layton /* 216dc5ddce9SJeff Layton * in which case, p points to an error code. Anything other 217dc5ddce9SJeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 218dc5ddce9SJeff Layton */ 219dc5ddce9SJeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 220dc5ddce9SJeff Layton if (!IS_ERR(p)) 221dc5ddce9SJeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 222dc5ddce9SJeff Layton ERR_PTR(-EACCES); 2231da177e4SLinus Torvalds goto err; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds /* copy the opaque wire context */ 2261da177e4SLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2271da177e4SLinus Torvalds if (IS_ERR(p)) 2281da177e4SLinus Torvalds goto err; 2291da177e4SLinus Torvalds /* import the opaque security context */ 2301da177e4SLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2311da177e4SLinus Torvalds if (IS_ERR(p)) 2321da177e4SLinus Torvalds goto err; 2331da177e4SLinus Torvalds q = (const void *)((const char *)p + seclen); 2341da177e4SLinus Torvalds if (unlikely(q > end || q < p)) { 2351da177e4SLinus Torvalds p = ERR_PTR(-EFAULT); 2361da177e4SLinus Torvalds goto err; 2371da177e4SLinus Torvalds } 238400f26b5SSimo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2391da177e4SLinus Torvalds if (ret < 0) { 2400c77668dSChuck Lever trace_rpcgss_import_ctx(ret); 2411da177e4SLinus Torvalds p = ERR_PTR(ret); 2421da177e4SLinus Torvalds goto err; 2431da177e4SLinus Torvalds } 2442004c726SJeff Layton 2452004c726SJeff Layton /* is there any trailing data? */ 2462004c726SJeff Layton if (q == end) { 2472004c726SJeff Layton p = q; 2482004c726SJeff Layton goto done; 2492004c726SJeff Layton } 2502004c726SJeff Layton 2512004c726SJeff Layton /* pull in acceptor name (if there is one) */ 2522004c726SJeff Layton p = simple_get_netobj(q, end, &ctx->gc_acceptor); 2532004c726SJeff Layton if (IS_ERR(p)) 2542004c726SJeff Layton goto err; 2552004c726SJeff Layton done: 2560c77668dSChuck Lever trace_rpcgss_context(ctx->gc_expiry, now, timeout, 2570c77668dSChuck Lever ctx->gc_acceptor.len, ctx->gc_acceptor.data); 2581da177e4SLinus Torvalds err: 2591da177e4SLinus Torvalds return p; 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 262a1a23777SChuck Lever /* XXX: Need some documentation about why UPCALL_BUF_LEN is so small. 263a1a23777SChuck Lever * Is user space expecting no more than UPCALL_BUF_LEN bytes? 264a1a23777SChuck Lever * Note that there are now _two_ NI_MAXHOST sized data items 265a1a23777SChuck Lever * being passed in this string. 266a1a23777SChuck Lever */ 267a1a23777SChuck Lever #define UPCALL_BUF_LEN 256 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds struct gss_upcall_msg { 2707ff13969SReshetova, Elena refcount_t count; 2717eaf040bSEric W. Biederman kuid_t uid; 272ac83228aSTrond Myklebust const char *service_name; 2731da177e4SLinus Torvalds struct rpc_pipe_msg msg; 2741da177e4SLinus Torvalds struct list_head list; 2751da177e4SLinus Torvalds struct gss_auth *auth; 2769beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 2771da177e4SLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2781da177e4SLinus Torvalds wait_queue_head_t waitqueue; 2791da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 28034769fc4S\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2811da177e4SLinus Torvalds }; 2821da177e4SLinus Torvalds 2832aed8b47STrond Myklebust static int get_pipe_version(struct net *net) 28479a3f20bS\"J. Bruce Fields\ { 2852aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 28679a3f20bS\"J. Bruce Fields\ int ret; 28779a3f20bS\"J. Bruce Fields\ 28879a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 2892aed8b47STrond Myklebust if (sn->pipe_version >= 0) { 2902aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 2912aed8b47STrond Myklebust ret = sn->pipe_version; 29279a3f20bS\"J. Bruce Fields\ } else 29379a3f20bS\"J. Bruce Fields\ ret = -EAGAIN; 29479a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 29579a3f20bS\"J. Bruce Fields\ return ret; 29679a3f20bS\"J. Bruce Fields\ } 29779a3f20bS\"J. Bruce Fields\ 2982aed8b47STrond Myklebust static void put_pipe_version(struct net *net) 29979a3f20bS\"J. Bruce Fields\ { 3002aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 3012aed8b47STrond Myklebust 3022aed8b47STrond Myklebust if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { 3032aed8b47STrond Myklebust sn->pipe_version = -1; 30479a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 30579a3f20bS\"J. Bruce Fields\ } 30679a3f20bS\"J. Bruce Fields\ } 30779a3f20bS\"J. Bruce Fields\ 3081da177e4SLinus Torvalds static void 3091da177e4SLinus Torvalds gss_release_msg(struct gss_upcall_msg *gss_msg) 3101da177e4SLinus Torvalds { 311e726340aSTrond Myklebust struct net *net = gss_msg->auth->net; 3127ff13969SReshetova, Elena if (!refcount_dec_and_test(&gss_msg->count)) 3131da177e4SLinus Torvalds return; 3142aed8b47STrond Myklebust put_pipe_version(net); 3151da177e4SLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 3161da177e4SLinus Torvalds if (gss_msg->ctx != NULL) 3171da177e4SLinus Torvalds gss_put_ctx(gss_msg->ctx); 318f6a1cc89STrond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3199eb2ddb4STrond Myklebust gss_put_auth(gss_msg->auth); 320ac83228aSTrond Myklebust kfree_const(gss_msg->service_name); 3211da177e4SLinus Torvalds kfree(gss_msg); 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds static struct gss_upcall_msg * 3259130b8dbSOlga Kornievskaia __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth) 3261da177e4SLinus Torvalds { 3271da177e4SLinus Torvalds struct gss_upcall_msg *pos; 3289beae467SStanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3290b4d51b0SEric W. Biederman if (!uid_eq(pos->uid, uid)) 3301da177e4SLinus Torvalds continue; 3319130b8dbSOlga Kornievskaia if (auth && pos->auth->service != auth->service) 3329130b8dbSOlga Kornievskaia continue; 3337ff13969SReshetova, Elena refcount_inc(&pos->count); 3341da177e4SLinus Torvalds return pos; 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds return NULL; 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 339720b8f2dS\\\"J. Bruce Fields\\\ /* Try to add an upcall to the pipefs queue. 3401da177e4SLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3411da177e4SLinus Torvalds * to that upcall instead of adding the new upcall. 3421da177e4SLinus Torvalds */ 3431da177e4SLinus Torvalds static inline struct gss_upcall_msg * 344053e324fSSuresh Jayaraman gss_add_msg(struct gss_upcall_msg *gss_msg) 3451da177e4SLinus Torvalds { 3469beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3471da177e4SLinus Torvalds struct gss_upcall_msg *old; 3481da177e4SLinus Torvalds 3499beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3509130b8dbSOlga Kornievskaia old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth); 3511da177e4SLinus Torvalds if (old == NULL) { 3527ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 3539beae467SStanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3541da177e4SLinus Torvalds } else 3551da177e4SLinus Torvalds gss_msg = old; 3569beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3571da177e4SLinus Torvalds return gss_msg; 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds static void 3611da177e4SLinus Torvalds __gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3621da177e4SLinus Torvalds { 3631da177e4SLinus Torvalds list_del_init(&gss_msg->list); 3641da177e4SLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3651da177e4SLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3667ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds static void 3701da177e4SLinus Torvalds gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3711da177e4SLinus Torvalds { 3729beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3731da177e4SLinus Torvalds 3743b68aaeaSTrond Myklebust if (list_empty(&gss_msg->list)) 3753b68aaeaSTrond Myklebust return; 3769beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 3773b68aaeaSTrond Myklebust if (!list_empty(&gss_msg->list)) 3781da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 3799beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds static void 383126e216aSTrond Myklebust gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 384126e216aSTrond Myklebust { 385126e216aSTrond Myklebust switch (gss_msg->msg.errno) { 386126e216aSTrond Myklebust case 0: 387126e216aSTrond Myklebust if (gss_msg->ctx == NULL) 388126e216aSTrond Myklebust break; 389126e216aSTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 390126e216aSTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 391126e216aSTrond Myklebust break; 392126e216aSTrond Myklebust case -EKEYEXPIRED: 393126e216aSTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 394126e216aSTrond Myklebust } 395126e216aSTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 396126e216aSTrond Myklebust gss_cred->gc_upcall = NULL; 397126e216aSTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 398126e216aSTrond Myklebust } 399126e216aSTrond Myklebust 400126e216aSTrond Myklebust static void 4011da177e4SLinus Torvalds gss_upcall_callback(struct rpc_task *task) 4021da177e4SLinus Torvalds { 403a17c2153STrond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 4041da177e4SLinus Torvalds struct gss_cred, gc_base); 4051da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 4069beae467SStanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 4071da177e4SLinus Torvalds 4089beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 409126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 4109beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 411126e216aSTrond Myklebust task->tk_status = gss_msg->msg.errno; 4121da177e4SLinus Torvalds gss_release_msg(gss_msg); 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds 415ac83228aSTrond Myklebust static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg, 416ac83228aSTrond Myklebust const struct cred *cred) 41734769fc4S\"J. Bruce Fields\ { 418ac83228aSTrond Myklebust struct user_namespace *userns = cred->user_ns; 419283ebe3eSTrond Myklebust 420283ebe3eSTrond Myklebust uid_t uid = from_kuid_munged(userns, gss_msg->uid); 42190602c7bSEric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 42290602c7bSEric W. Biederman gss_msg->msg.data = gss_msg->databuf; 42390602c7bSEric W. Biederman gss_msg->msg.len = sizeof(uid); 4249d3a2260STrond Myklebust 4259d3a2260STrond Myklebust BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); 42634769fc4S\"J. Bruce Fields\ } 42734769fc4S\"J. Bruce Fields\ 428ac83228aSTrond Myklebust static ssize_t 429ac83228aSTrond Myklebust gss_v0_upcall(struct file *file, struct rpc_pipe_msg *msg, 430ac83228aSTrond Myklebust char __user *buf, size_t buflen) 431ac83228aSTrond Myklebust { 432ac83228aSTrond Myklebust struct gss_upcall_msg *gss_msg = container_of(msg, 433ac83228aSTrond Myklebust struct gss_upcall_msg, 434ac83228aSTrond Myklebust msg); 435ac83228aSTrond Myklebust if (msg->copied == 0) 436ac83228aSTrond Myklebust gss_encode_v0_msg(gss_msg, file->f_cred); 437ac83228aSTrond Myklebust return rpc_pipe_generic_upcall(file, msg, buf, buflen); 438ac83228aSTrond Myklebust } 439ac83228aSTrond Myklebust 4409d3a2260STrond Myklebust static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 441bd4a3eb1STrond Myklebust const char *service_name, 442ac83228aSTrond Myklebust const char *target_name, 443ac83228aSTrond Myklebust const struct cred *cred) 44434769fc4S\"J. Bruce Fields\ { 445ac83228aSTrond Myklebust struct user_namespace *userns = cred->user_ns; 446683ac665STrond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4478b1c7bf5SOlga Kornievskaia char *p = gss_msg->databuf; 4489d3a2260STrond Myklebust size_t buflen = sizeof(gss_msg->databuf); 4499d3a2260STrond Myklebust int len; 4508b1c7bf5SOlga Kornievskaia 4519d3a2260STrond Myklebust len = scnprintf(p, buflen, "mech=%s uid=%d", mech->gm_name, 452283ebe3eSTrond Myklebust from_kuid_munged(userns, gss_msg->uid)); 4539d3a2260STrond Myklebust buflen -= len; 4549d3a2260STrond Myklebust p += len; 4559d3a2260STrond Myklebust gss_msg->msg.len = len; 456108b833cSChuck Lever 457108b833cSChuck Lever /* 458108b833cSChuck Lever * target= is a full service principal that names the remote 459108b833cSChuck Lever * identity that we are authenticating to. 460108b833cSChuck Lever */ 461bd4a3eb1STrond Myklebust if (target_name) { 4629d3a2260STrond Myklebust len = scnprintf(p, buflen, " target=%s", target_name); 4639d3a2260STrond Myklebust buflen -= len; 4648b1c7bf5SOlga Kornievskaia p += len; 4658b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 4668b1c7bf5SOlga Kornievskaia } 467108b833cSChuck Lever 468108b833cSChuck Lever /* 469108b833cSChuck Lever * gssd uses service= and srchost= to select a matching key from 470108b833cSChuck Lever * the system's keytab to use as the source principal. 471108b833cSChuck Lever * 472108b833cSChuck Lever * service= is the service name part of the source principal, 473108b833cSChuck Lever * or "*" (meaning choose any). 474108b833cSChuck Lever * 475108b833cSChuck Lever * srchost= is the hostname part of the source principal. When 476108b833cSChuck Lever * not provided, gssd uses the local hostname. 477108b833cSChuck Lever */ 478a1a23777SChuck Lever if (service_name) { 479a1a23777SChuck Lever char *c = strchr(service_name, '@'); 480a1a23777SChuck Lever 481a1a23777SChuck Lever if (!c) 482a1a23777SChuck Lever len = scnprintf(p, buflen, " service=%s", 483a1a23777SChuck Lever service_name); 484a1a23777SChuck Lever else 485a1a23777SChuck Lever len = scnprintf(p, buflen, 486a1a23777SChuck Lever " service=%.*s srchost=%s", 487a1a23777SChuck Lever (int)(c - service_name), 488a1a23777SChuck Lever service_name, c + 1); 4899d3a2260STrond Myklebust buflen -= len; 4902efef708SOlga Kornievskaia p += len; 4912efef708SOlga Kornievskaia gss_msg->msg.len += len; 4922efef708SOlga Kornievskaia } 493108b833cSChuck Lever 494683ac665STrond Myklebust if (mech->gm_upcall_enctypes) { 4959d3a2260STrond Myklebust len = scnprintf(p, buflen, " enctypes=%s", 4969d3a2260STrond Myklebust mech->gm_upcall_enctypes); 4979d3a2260STrond Myklebust buflen -= len; 498683ac665STrond Myklebust p += len; 499683ac665STrond Myklebust gss_msg->msg.len += len; 500683ac665STrond Myklebust } 5010c77668dSChuck Lever trace_rpcgss_upcall_msg(gss_msg->databuf); 5029d3a2260STrond Myklebust len = scnprintf(p, buflen, "\n"); 5039d3a2260STrond Myklebust if (len == 0) 5049d3a2260STrond Myklebust goto out_overflow; 5058b1c7bf5SOlga Kornievskaia gss_msg->msg.len += len; 50634769fc4S\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 5079d3a2260STrond Myklebust return 0; 5089d3a2260STrond Myklebust out_overflow: 5099d3a2260STrond Myklebust WARN_ON_ONCE(1); 5109d3a2260STrond Myklebust return -ENOMEM; 51134769fc4S\"J. Bruce Fields\ } 51234769fc4S\"J. Bruce Fields\ 513ac83228aSTrond Myklebust static ssize_t 514ac83228aSTrond Myklebust gss_v1_upcall(struct file *file, struct rpc_pipe_msg *msg, 515ac83228aSTrond Myklebust char __user *buf, size_t buflen) 516ac83228aSTrond Myklebust { 517ac83228aSTrond Myklebust struct gss_upcall_msg *gss_msg = container_of(msg, 518ac83228aSTrond Myklebust struct gss_upcall_msg, 519ac83228aSTrond Myklebust msg); 520ac83228aSTrond Myklebust int err; 521ac83228aSTrond Myklebust if (msg->copied == 0) { 522ac83228aSTrond Myklebust err = gss_encode_v1_msg(gss_msg, 523ac83228aSTrond Myklebust gss_msg->service_name, 524ac83228aSTrond Myklebust gss_msg->auth->target_name, 525ac83228aSTrond Myklebust file->f_cred); 526ac83228aSTrond Myklebust if (err) 527ac83228aSTrond Myklebust return err; 528ac83228aSTrond Myklebust } 529ac83228aSTrond Myklebust return rpc_pipe_generic_upcall(file, msg, buf, buflen); 530ac83228aSTrond Myklebust } 531ac83228aSTrond Myklebust 53268c97153STrond Myklebust static struct gss_upcall_msg * 533e726340aSTrond Myklebust gss_alloc_msg(struct gss_auth *gss_auth, 5347eaf040bSEric W. Biederman kuid_t uid, const char *service_name) 5351da177e4SLinus Torvalds { 5361da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 53779a3f20bS\"J. Bruce Fields\ int vers; 5389d3a2260STrond Myklebust int err = -ENOMEM; 5391da177e4SLinus Torvalds 5400f38b873STrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 541db75b3d6S\"J. Bruce Fields\ if (gss_msg == NULL) 5429d3a2260STrond Myklebust goto err; 543e726340aSTrond Myklebust vers = get_pipe_version(gss_auth->net); 5449d3a2260STrond Myklebust err = vers; 5459d3a2260STrond Myklebust if (err < 0) 5469d3a2260STrond Myklebust goto err_free_msg; 54719172284STrond Myklebust gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; 5481da177e4SLinus Torvalds INIT_LIST_HEAD(&gss_msg->list); 5491da177e4SLinus Torvalds rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 5501da177e4SLinus Torvalds init_waitqueue_head(&gss_msg->waitqueue); 5517ff13969SReshetova, Elena refcount_set(&gss_msg->count, 1); 5521da177e4SLinus Torvalds gss_msg->uid = uid; 5531da177e4SLinus Torvalds gss_msg->auth = gss_auth; 554ac83228aSTrond Myklebust if (service_name) { 555ac83228aSTrond Myklebust gss_msg->service_name = kstrdup_const(service_name, GFP_NOFS); 556ac83228aSTrond Myklebust if (!gss_msg->service_name) 557e9776d0fSTrond Myklebust goto err_put_pipe_version; 55807d53ae4Szhong jiang } 5591da177e4SLinus Torvalds return gss_msg; 560e9776d0fSTrond Myklebust err_put_pipe_version: 561e9776d0fSTrond Myklebust put_pipe_version(gss_auth->net); 5629d3a2260STrond Myklebust err_free_msg: 5639d3a2260STrond Myklebust kfree(gss_msg); 5649d3a2260STrond Myklebust err: 5659d3a2260STrond Myklebust return ERR_PTR(err); 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds static struct gss_upcall_msg * 569e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 5701da177e4SLinus Torvalds { 5717c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 5727c67db3aSTrond Myklebust struct gss_cred, gc_base); 5731da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 57404d1532bSNeilBrown kuid_t uid = cred->cr_cred->fsuid; 5751da177e4SLinus Torvalds 576e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 577db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 578db75b3d6S\"J. Bruce Fields\ return gss_new; 579053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 5801da177e4SLinus Torvalds if (gss_msg == gss_new) { 5811cded9d2SNeilBrown int res; 5827ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 5831cded9d2SNeilBrown res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 5841da177e4SLinus Torvalds if (res) { 5851da177e4SLinus Torvalds gss_unhash_msg(gss_new); 5867ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 5871cded9d2SNeilBrown gss_release_msg(gss_new); 5881da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds } else 5911da177e4SLinus Torvalds gss_release_msg(gss_new); 5921da177e4SLinus Torvalds return gss_msg; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 595b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 596b03568c3S\"J. Bruce Fields\ { 5970ea9de0eSJeff Layton dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); 598b03568c3S\"J. Bruce Fields\ } 599b03568c3S\"J. Bruce Fields\ 6001da177e4SLinus Torvalds static inline int 6011da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 6021da177e4SLinus Torvalds { 603a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 6044a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 6051da177e4SLinus Torvalds struct gss_auth, rpc_auth); 6061da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 6071da177e4SLinus Torvalds struct gss_cred, gc_base); 6081da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6099beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6101da177e4SLinus Torvalds int err = 0; 6111da177e4SLinus Torvalds 612e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 613480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 61479a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 61579a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 61679a3f20bS\"J. Bruce Fields\ warn_gssd(); 6176b2e6856STrond Myklebust rpc_sleep_on_timeout(&pipe_version_rpc_waitqueue, 6186b2e6856STrond Myklebust task, NULL, jiffies + (15 * HZ)); 6190c77668dSChuck Lever err = -EAGAIN; 6200c77668dSChuck Lever goto out; 62179a3f20bS\"J. Bruce Fields\ } 6221da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6231da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6241da177e4SLinus Torvalds goto out; 6251da177e4SLinus Torvalds } 6269beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6279beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6281da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 6295d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 630126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 6311da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 6321da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 6337ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 6345d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 635126e216aSTrond Myklebust } else { 636126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 6371da177e4SLinus Torvalds err = gss_msg->msg.errno; 638126e216aSTrond Myklebust } 6399beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6401da177e4SLinus Torvalds gss_release_msg(gss_msg); 6411da177e4SLinus Torvalds out: 6420c77668dSChuck Lever trace_rpcgss_upcall_result(from_kuid(&init_user_ns, 6430c77668dSChuck Lever cred->cr_cred->fsuid), err); 6441da177e4SLinus Torvalds return err; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds static inline int 6481da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 6491da177e4SLinus Torvalds { 650e726340aSTrond Myklebust struct net *net = gss_auth->net; 651abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 6529beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6531da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 6541da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6551da177e4SLinus Torvalds DEFINE_WAIT(wait); 656d36ccb9cSTrond Myklebust int err; 6571da177e4SLinus Torvalds 65879a3f20bS\"J. Bruce Fields\ retry: 659d36ccb9cSTrond Myklebust err = 0; 66089f84243SJeff Layton /* if gssd is down, just skip upcalling altogether */ 66189f84243SJeff Layton if (!gssd_running(net)) { 66289f84243SJeff Layton warn_gssd(); 6630c77668dSChuck Lever err = -EACCES; 6640c77668dSChuck Lever goto out; 66589f84243SJeff Layton } 666e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 66779a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 66879a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 66989f84243SJeff Layton sn->pipe_version >= 0, 15 * HZ); 6702aed8b47STrond Myklebust if (sn->pipe_version < 0) { 671d1a8016aSBryan Schumaker warn_gssd(); 672d1a8016aSBryan Schumaker err = -EACCES; 673d1a8016aSBryan Schumaker } 674d36ccb9cSTrond Myklebust if (err < 0) 67579a3f20bS\"J. Bruce Fields\ goto out; 67679a3f20bS\"J. Bruce Fields\ goto retry; 67779a3f20bS\"J. Bruce Fields\ } 6781da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6791da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6801da177e4SLinus Torvalds goto out; 6811da177e4SLinus Torvalds } 6829beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6831da177e4SLinus Torvalds for (;;) { 6845afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6859beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6861da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6871da177e4SLinus Torvalds break; 6881da177e4SLinus Torvalds } 6899beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6905afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6911da177e4SLinus Torvalds err = -ERESTARTSYS; 6921da177e4SLinus Torvalds goto out_intr; 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds schedule(); 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds if (gss_msg->ctx) 6977b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6981da177e4SLinus Torvalds else 6991da177e4SLinus Torvalds err = gss_msg->msg.errno; 7009beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7011da177e4SLinus Torvalds out_intr: 7021da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 7031da177e4SLinus Torvalds gss_release_msg(gss_msg); 7041da177e4SLinus Torvalds out: 7050c77668dSChuck Lever trace_rpcgss_upcall_result(from_kuid(&init_user_ns, 7060c77668dSChuck Lever cred->cr_cred->fsuid), err); 7071da177e4SLinus Torvalds return err; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds static ssize_t 7131da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 7141da177e4SLinus Torvalds { 7151da177e4SLinus Torvalds const void *p, *end; 7161da177e4SLinus Torvalds void *buf; 7171da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 718496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 7191da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 72090602c7bSEric W. Biederman uid_t id; 72190602c7bSEric W. Biederman kuid_t uid; 7223b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 7251da177e4SLinus Torvalds goto out; 7261da177e4SLinus Torvalds err = -ENOMEM; 7270f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 7281da177e4SLinus Torvalds if (!buf) 7291da177e4SLinus Torvalds goto out; 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds err = -EFAULT; 7321da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 7331da177e4SLinus Torvalds goto err; 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 73690602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 7371da177e4SLinus Torvalds if (IS_ERR(p)) { 7381da177e4SLinus Torvalds err = PTR_ERR(p); 7391da177e4SLinus Torvalds goto err; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 742283ebe3eSTrond Myklebust uid = make_kuid(current_user_ns(), id); 74390602c7bSEric W. Biederman if (!uid_valid(uid)) { 74490602c7bSEric W. Biederman err = -EINVAL; 74590602c7bSEric W. Biederman goto err; 74690602c7bSEric W. Biederman } 74790602c7bSEric W. Biederman 7481da177e4SLinus Torvalds err = -ENOMEM; 7491da177e4SLinus Torvalds ctx = gss_alloc_context(); 7501da177e4SLinus Torvalds if (ctx == NULL) 7511da177e4SLinus Torvalds goto err; 7523b68aaeaSTrond Myklebust 7533b68aaeaSTrond Myklebust err = -ENOENT; 7543b68aaeaSTrond Myklebust /* Find a matching upcall */ 7559beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7569130b8dbSOlga Kornievskaia gss_msg = __gss_find_upcall(pipe, uid, NULL); 7573b68aaeaSTrond Myklebust if (gss_msg == NULL) { 7589beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7593b68aaeaSTrond Myklebust goto err_put_ctx; 7603b68aaeaSTrond Myklebust } 7613b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 7629beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7633b68aaeaSTrond Myklebust 7646e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 7651da177e4SLinus Torvalds if (IS_ERR(p)) { 7661da177e4SLinus Torvalds err = PTR_ERR(p); 767486bad2eSJeff Layton switch (err) { 768486bad2eSJeff Layton case -EACCES: 769dc5ddce9SJeff Layton case -EKEYEXPIRED: 770486bad2eSJeff Layton gss_msg->msg.errno = err; 771486bad2eSJeff Layton err = mlen; 772486bad2eSJeff Layton break; 773486bad2eSJeff Layton case -EFAULT: 774486bad2eSJeff Layton case -ENOMEM: 775486bad2eSJeff Layton case -EINVAL: 776486bad2eSJeff Layton case -ENOSYS: 777486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 778486bad2eSJeff Layton break; 779486bad2eSJeff Layton default: 780486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7816c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 782437b300cSScott Mayhew gss_msg->msg.errno = -EIO; 783486bad2eSJeff Layton } 7843b68aaeaSTrond Myklebust goto err_release_msg; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7873b68aaeaSTrond Myklebust err = mlen; 7883b68aaeaSTrond Myklebust 7893b68aaeaSTrond Myklebust err_release_msg: 7909beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7911da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7929beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7931da177e4SLinus Torvalds gss_release_msg(gss_msg); 7941da177e4SLinus Torvalds err_put_ctx: 7951da177e4SLinus Torvalds gss_put_ctx(ctx); 7961da177e4SLinus Torvalds err: 7971da177e4SLinus Torvalds kfree(buf); 7981da177e4SLinus Torvalds out: 7991da177e4SLinus Torvalds return err; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 80234769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 803cf81939dS\"J. Bruce Fields\ { 8042aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8052aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 80634769fc4S\"J. Bruce Fields\ int ret = 0; 80734769fc4S\"J. Bruce Fields\ 80879a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 8092aed8b47STrond Myklebust if (sn->pipe_version < 0) { 81034769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 8112aed8b47STrond Myklebust sn->pipe_version = new_version; 81279a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 81379a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 8142aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 81534769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 81634769fc4S\"J. Bruce Fields\ ret = -EBUSY; 81734769fc4S\"J. Bruce Fields\ goto out; 81879a3f20bS\"J. Bruce Fields\ } 8192aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 82034769fc4S\"J. Bruce Fields\ out: 82179a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 82234769fc4S\"J. Bruce Fields\ return ret; 82334769fc4S\"J. Bruce Fields\ 82434769fc4S\"J. Bruce Fields\ } 82534769fc4S\"J. Bruce Fields\ 82634769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 82734769fc4S\"J. Bruce Fields\ { 82834769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 82934769fc4S\"J. Bruce Fields\ } 83034769fc4S\"J. Bruce Fields\ 83134769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 83234769fc4S\"J. Bruce Fields\ { 83334769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 834cf81939dS\"J. Bruce Fields\ } 835cf81939dS\"J. Bruce Fields\ 8361da177e4SLinus Torvalds static void 8371da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 8381da177e4SLinus Torvalds { 8392aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8409beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 8411da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 8421da177e4SLinus Torvalds 8435a67657aSTrond Myklebust restart: 8449beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 8459beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 8466e84c7b6STrond Myklebust 8475a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 8485a67657aSTrond Myklebust continue; 8491da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 8507ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8511da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 8529beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 8531da177e4SLinus Torvalds gss_release_msg(gss_msg); 8545a67657aSTrond Myklebust goto restart; 8551da177e4SLinus Torvalds } 8569beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 857cf81939dS\"J. Bruce Fields\ 8582aed8b47STrond Myklebust put_pipe_version(net); 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds static void 8621da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 8631da177e4SLinus Torvalds { 8641da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 8651da177e4SLinus Torvalds 8661da177e4SLinus Torvalds if (msg->errno < 0) { 8677ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8681da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 869b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 870b03568c3S\"J. Bruce Fields\ warn_gssd(); 8711da177e4SLinus Torvalds gss_release_msg(gss_msg); 8721da177e4SLinus Torvalds } 8731cded9d2SNeilBrown gss_release_msg(gss_msg); 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds 87619172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 87719172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 878ccdc28f8SStanislav Kinsbursky { 87919172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 88019172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 881ccdc28f8SStanislav Kinsbursky 88219172284STrond Myklebust if (pipe->dentry != NULL) { 88319172284STrond Myklebust rpc_unlink(pipe->dentry); 88419172284STrond Myklebust pipe->dentry = NULL; 8856b2fddd3STrond Myklebust } 886ccdc28f8SStanislav Kinsbursky } 887ccdc28f8SStanislav Kinsbursky 88819172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 88919172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 890ccdc28f8SStanislav Kinsbursky { 89119172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8926b2fddd3STrond Myklebust struct dentry *dentry; 893ccdc28f8SStanislav Kinsbursky 89419172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 89519172284STrond Myklebust if (IS_ERR(dentry)) 89619172284STrond Myklebust return PTR_ERR(dentry); 89719172284STrond Myklebust p->pipe->dentry = dentry; 898ccdc28f8SStanislav Kinsbursky return 0; 89919172284STrond Myklebust } 900ccdc28f8SStanislav Kinsbursky 90119172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 90219172284STrond Myklebust .create = gss_pipe_dentry_create, 90319172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 90419172284STrond Myklebust }; 90519172284STrond Myklebust 90619172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 90719172284STrond Myklebust const char *name, 90819172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 90919172284STrond Myklebust { 91019172284STrond Myklebust struct gss_pipe *p; 91119172284STrond Myklebust int err = -ENOMEM; 91219172284STrond Myklebust 91319172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 91419172284STrond Myklebust if (p == NULL) 91519172284STrond Myklebust goto err; 91619172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 91719172284STrond Myklebust if (IS_ERR(p->pipe)) { 91819172284STrond Myklebust err = PTR_ERR(p->pipe); 91919172284STrond Myklebust goto err_free_gss_pipe; 92019172284STrond Myklebust } 92119172284STrond Myklebust p->name = name; 92219172284STrond Myklebust p->clnt = clnt; 923414a6295STrond Myklebust kref_init(&p->kref); 92419172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 92519172284STrond Myklebust &gss_pipe_dir_object_ops, 92619172284STrond Myklebust p); 92719172284STrond Myklebust return p; 92819172284STrond Myklebust err_free_gss_pipe: 92919172284STrond Myklebust kfree(p); 9306b2fddd3STrond Myklebust err: 93119172284STrond Myklebust return ERR_PTR(err); 932ccdc28f8SStanislav Kinsbursky } 933ccdc28f8SStanislav Kinsbursky 934414a6295STrond Myklebust struct gss_alloc_pdo { 935414a6295STrond Myklebust struct rpc_clnt *clnt; 936414a6295STrond Myklebust const char *name; 937414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops; 938414a6295STrond Myklebust }; 939414a6295STrond Myklebust 940414a6295STrond Myklebust static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) 941414a6295STrond Myklebust { 942414a6295STrond Myklebust struct gss_pipe *gss_pipe; 943414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 944414a6295STrond Myklebust 945414a6295STrond Myklebust if (pdo->pdo_ops != &gss_pipe_dir_object_ops) 946414a6295STrond Myklebust return 0; 947414a6295STrond Myklebust gss_pipe = container_of(pdo, struct gss_pipe, pdo); 948414a6295STrond Myklebust if (strcmp(gss_pipe->name, args->name) != 0) 949414a6295STrond Myklebust return 0; 950414a6295STrond Myklebust if (!kref_get_unless_zero(&gss_pipe->kref)) 951414a6295STrond Myklebust return 0; 952414a6295STrond Myklebust return 1; 953414a6295STrond Myklebust } 954414a6295STrond Myklebust 955414a6295STrond Myklebust static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) 956414a6295STrond Myklebust { 957414a6295STrond Myklebust struct gss_pipe *gss_pipe; 958414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 959414a6295STrond Myklebust 960414a6295STrond Myklebust gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); 961414a6295STrond Myklebust if (!IS_ERR(gss_pipe)) 962414a6295STrond Myklebust return &gss_pipe->pdo; 963414a6295STrond Myklebust return NULL; 964414a6295STrond Myklebust } 965414a6295STrond Myklebust 966414a6295STrond Myklebust static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, 967414a6295STrond Myklebust const char *name, 968414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 969414a6295STrond Myklebust { 970414a6295STrond Myklebust struct net *net = rpc_net_ns(clnt); 971414a6295STrond Myklebust struct rpc_pipe_dir_object *pdo; 972414a6295STrond Myklebust struct gss_alloc_pdo args = { 973414a6295STrond Myklebust .clnt = clnt, 974414a6295STrond Myklebust .name = name, 975414a6295STrond Myklebust .upcall_ops = upcall_ops, 976414a6295STrond Myklebust }; 977414a6295STrond Myklebust 978414a6295STrond Myklebust pdo = rpc_find_or_alloc_pipe_dir_object(net, 979414a6295STrond Myklebust &clnt->cl_pipedir_objects, 980414a6295STrond Myklebust gss_pipe_match_pdo, 981414a6295STrond Myklebust gss_pipe_alloc_pdo, 982414a6295STrond Myklebust &args); 983414a6295STrond Myklebust if (pdo != NULL) 984414a6295STrond Myklebust return container_of(pdo, struct gss_pipe, pdo); 985414a6295STrond Myklebust return ERR_PTR(-ENOMEM); 986414a6295STrond Myklebust } 987414a6295STrond Myklebust 98819172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 989ccdc28f8SStanislav Kinsbursky { 99019172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 99119172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 992ccdc28f8SStanislav Kinsbursky 99319172284STrond Myklebust rpc_remove_pipe_dir_object(net, 99419172284STrond Myklebust &clnt->cl_pipedir_objects, 99519172284STrond Myklebust &p->pdo); 99619172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 99719172284STrond Myklebust kfree(p); 998ccdc28f8SStanislav Kinsbursky } 999ccdc28f8SStanislav Kinsbursky 1000414a6295STrond Myklebust static void __gss_pipe_release(struct kref *kref) 1001414a6295STrond Myklebust { 1002414a6295STrond Myklebust struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); 1003414a6295STrond Myklebust 1004414a6295STrond Myklebust __gss_pipe_free(p); 1005414a6295STrond Myklebust } 1006414a6295STrond Myklebust 100719172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 1008ccdc28f8SStanislav Kinsbursky { 100919172284STrond Myklebust if (p != NULL) 1010414a6295STrond Myklebust kref_put(&p->kref, __gss_pipe_release); 1011ccdc28f8SStanislav Kinsbursky } 1012ccdc28f8SStanislav Kinsbursky 10131da177e4SLinus Torvalds /* 10141da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 10151da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 10161da177e4SLinus Torvalds */ 1017eb6dc19dSTrond Myklebust static struct gss_auth * 101882b98ca5SSargun Dhillon gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 10191da177e4SLinus Torvalds { 1020c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 10211da177e4SLinus Torvalds struct gss_auth *gss_auth; 102219172284STrond Myklebust struct gss_pipe *gss_pipe; 10231da177e4SLinus Torvalds struct rpc_auth * auth; 10246a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 10276a19275aSJ. Bruce Fields return ERR_PTR(err); 10281da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 10291da177e4SLinus Torvalds goto out_dec; 1030eb6dc19dSTrond Myklebust INIT_HLIST_NODE(&gss_auth->hash); 1031bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 1032c2190661STrond Myklebust if (args->target_name) { 1033c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 1034bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 1035bd4a3eb1STrond Myklebust goto err_free; 1036bd4a3eb1STrond Myklebust } 10371da177e4SLinus Torvalds gss_auth->client = clnt; 1038e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 10396a19275aSJ. Bruce Fields err = -EINVAL; 10401da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 10410c77668dSChuck Lever if (!gss_auth->mech) 1042e726340aSTrond Myklebust goto err_put_net; 10431da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 1044438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 1045438b6fdeSJ. Bruce Fields goto err_put_mech; 1046a699d65eSTrond Myklebust if (!gssd_running(gss_auth->net)) 1047a699d65eSTrond Myklebust goto err_put_mech; 10481da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 10491da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 10501da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 1051a00275baSChuck Lever auth->au_verfsize = GSS_VERF_SLACK >> 2; 105235e77d21SChuck Lever auth->au_ralign = GSS_VERF_SLACK >> 2; 1053ce52914eSScott Mayhew auth->au_flags = 0; 10541da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 10551da177e4SLinus Torvalds auth->au_flavor = flavor; 105665b80179SChuck Lever if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor)) 105765b80179SChuck Lever auth->au_flags |= RPCAUTH_AUTH_DATATOUCH; 1058331bc71cSTrond Myklebust refcount_set(&auth->au_count, 1); 10590285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 10601da177e4SLinus Torvalds 106119172284STrond Myklebust err = rpcauth_init_credcache(auth); 106219172284STrond Myklebust if (err) 106319172284STrond Myklebust goto err_put_mech; 106434769fc4S\"J. Bruce Fields\ /* 106534769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 106634769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 106734769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 106834769fc4S\"J. Bruce Fields\ * the new pipe first. 106934769fc4S\"J. Bruce Fields\ */ 1070414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); 107119172284STrond Myklebust if (IS_ERR(gss_pipe)) { 107219172284STrond Myklebust err = PTR_ERR(gss_pipe); 107319172284STrond Myklebust goto err_destroy_credcache; 10746a19275aSJ. Bruce Fields } 107519172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 10761da177e4SLinus Torvalds 1077414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, 107819172284STrond Myklebust &gss_upcall_ops_v0); 107919172284STrond Myklebust if (IS_ERR(gss_pipe)) { 108019172284STrond Myklebust err = PTR_ERR(gss_pipe); 1081c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 1082c239d83bSStanislav Kinsbursky } 108319172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 108407a2bf1dSTrond Myklebust 1085eb6dc19dSTrond Myklebust return gss_auth; 1086c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 1087414a6295STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 108819172284STrond Myklebust err_destroy_credcache: 108919172284STrond Myklebust rpcauth_destroy_credcache(auth); 10901da177e4SLinus Torvalds err_put_mech: 10911da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 1092e726340aSTrond Myklebust err_put_net: 1093e726340aSTrond Myklebust put_net(gss_auth->net); 10941da177e4SLinus Torvalds err_free: 1095bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10961da177e4SLinus Torvalds kfree(gss_auth); 10971da177e4SLinus Torvalds out_dec: 10981da177e4SLinus Torvalds module_put(THIS_MODULE); 10990c77668dSChuck Lever trace_rpcgss_createauth(flavor, err); 11006a19275aSJ. Bruce Fields return ERR_PTR(err); 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds static void 11040285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 11050285ed1fSTrond Myklebust { 110619172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 110719172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 11080285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 1109e726340aSTrond Myklebust put_net(gss_auth->net); 1110bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 11110285ed1fSTrond Myklebust 11120285ed1fSTrond Myklebust kfree(gss_auth); 11130285ed1fSTrond Myklebust module_put(THIS_MODULE); 11140285ed1fSTrond Myklebust } 11150285ed1fSTrond Myklebust 11160285ed1fSTrond Myklebust static void 11170285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 11180285ed1fSTrond Myklebust { 11190285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 11200285ed1fSTrond Myklebust 11210285ed1fSTrond Myklebust gss_free(gss_auth); 11220285ed1fSTrond Myklebust } 11230285ed1fSTrond Myklebust 11240285ed1fSTrond Myklebust static void 11259eb2ddb4STrond Myklebust gss_put_auth(struct gss_auth *gss_auth) 11269eb2ddb4STrond Myklebust { 11279eb2ddb4STrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 11289eb2ddb4STrond Myklebust } 11299eb2ddb4STrond Myklebust 11309eb2ddb4STrond Myklebust static void 11311da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 11321da177e4SLinus Torvalds { 113319172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 113419172284STrond Myklebust struct gss_auth, rpc_auth); 11351da177e4SLinus Torvalds 1136eb6dc19dSTrond Myklebust if (hash_hashed(&gss_auth->hash)) { 1137eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1138eb6dc19dSTrond Myklebust hash_del(&gss_auth->hash); 1139eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1140eb6dc19dSTrond Myklebust } 1141eb6dc19dSTrond Myklebust 114219172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 114319172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 114419172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 114519172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 11463ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 11473ab9bb72STrond Myklebust 11489eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds 1151a0f6ed8eSJ. Bruce Fields /* 1152a0f6ed8eSJ. Bruce Fields * Auths may be shared between rpc clients that were cloned from a 1153a0f6ed8eSJ. Bruce Fields * common client with the same xprt, if they also share the flavor and 1154a0f6ed8eSJ. Bruce Fields * target_name. 1155a0f6ed8eSJ. Bruce Fields * 1156a0f6ed8eSJ. Bruce Fields * The auth is looked up from the oldest parent sharing the same 1157a0f6ed8eSJ. Bruce Fields * cl_xprt, and the auth itself references only that common parent 1158a0f6ed8eSJ. Bruce Fields * (which is guaranteed to last as long as any of its descendants). 1159a0f6ed8eSJ. Bruce Fields */ 1160eb6dc19dSTrond Myklebust static struct gss_auth * 116182b98ca5SSargun Dhillon gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args, 1162eb6dc19dSTrond Myklebust struct rpc_clnt *clnt, 1163eb6dc19dSTrond Myklebust struct gss_auth *new) 1164eb6dc19dSTrond Myklebust { 1165eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1166eb6dc19dSTrond Myklebust unsigned long hashval = (unsigned long)clnt; 1167eb6dc19dSTrond Myklebust 1168eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1169eb6dc19dSTrond Myklebust hash_for_each_possible(gss_auth_hash_table, 1170eb6dc19dSTrond Myklebust gss_auth, 1171eb6dc19dSTrond Myklebust hash, 1172eb6dc19dSTrond Myklebust hashval) { 1173a0f6ed8eSJ. Bruce Fields if (gss_auth->client != clnt) 1174a0f6ed8eSJ. Bruce Fields continue; 1175eb6dc19dSTrond Myklebust if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) 1176eb6dc19dSTrond Myklebust continue; 1177eb6dc19dSTrond Myklebust if (gss_auth->target_name != args->target_name) { 1178eb6dc19dSTrond Myklebust if (gss_auth->target_name == NULL) 1179eb6dc19dSTrond Myklebust continue; 1180eb6dc19dSTrond Myklebust if (args->target_name == NULL) 1181eb6dc19dSTrond Myklebust continue; 1182eb6dc19dSTrond Myklebust if (strcmp(gss_auth->target_name, args->target_name)) 1183eb6dc19dSTrond Myklebust continue; 1184eb6dc19dSTrond Myklebust } 1185331bc71cSTrond Myklebust if (!refcount_inc_not_zero(&gss_auth->rpc_auth.au_count)) 1186eb6dc19dSTrond Myklebust continue; 1187eb6dc19dSTrond Myklebust goto out; 1188eb6dc19dSTrond Myklebust } 1189eb6dc19dSTrond Myklebust if (new) 1190eb6dc19dSTrond Myklebust hash_add(gss_auth_hash_table, &new->hash, hashval); 1191eb6dc19dSTrond Myklebust gss_auth = new; 1192eb6dc19dSTrond Myklebust out: 1193eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1194eb6dc19dSTrond Myklebust return gss_auth; 1195eb6dc19dSTrond Myklebust } 1196eb6dc19dSTrond Myklebust 1197eb6dc19dSTrond Myklebust static struct gss_auth * 119882b98ca5SSargun Dhillon gss_create_hashed(const struct rpc_auth_create_args *args, 119982b98ca5SSargun Dhillon struct rpc_clnt *clnt) 1200eb6dc19dSTrond Myklebust { 1201eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1202eb6dc19dSTrond Myklebust struct gss_auth *new; 1203eb6dc19dSTrond Myklebust 1204eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); 1205eb6dc19dSTrond Myklebust if (gss_auth != NULL) 1206eb6dc19dSTrond Myklebust goto out; 1207eb6dc19dSTrond Myklebust new = gss_create_new(args, clnt); 1208eb6dc19dSTrond Myklebust if (IS_ERR(new)) 1209eb6dc19dSTrond Myklebust return new; 1210eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); 1211eb6dc19dSTrond Myklebust if (gss_auth != new) 1212eb6dc19dSTrond Myklebust gss_destroy(&new->rpc_auth); 1213eb6dc19dSTrond Myklebust out: 1214eb6dc19dSTrond Myklebust return gss_auth; 1215eb6dc19dSTrond Myklebust } 1216eb6dc19dSTrond Myklebust 1217eb6dc19dSTrond Myklebust static struct rpc_auth * 121882b98ca5SSargun Dhillon gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1219eb6dc19dSTrond Myklebust { 1220eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1221ad01b2c6STrond Myklebust struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); 1222eb6dc19dSTrond Myklebust 1223eb6dc19dSTrond Myklebust while (clnt != clnt->cl_parent) { 1224eb6dc19dSTrond Myklebust struct rpc_clnt *parent = clnt->cl_parent; 1225eb6dc19dSTrond Myklebust /* Find the original parent for this transport */ 1226ad01b2c6STrond Myklebust if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) 1227eb6dc19dSTrond Myklebust break; 1228eb6dc19dSTrond Myklebust clnt = parent; 1229eb6dc19dSTrond Myklebust } 1230eb6dc19dSTrond Myklebust 1231eb6dc19dSTrond Myklebust gss_auth = gss_create_hashed(args, clnt); 1232eb6dc19dSTrond Myklebust if (IS_ERR(gss_auth)) 1233eb6dc19dSTrond Myklebust return ERR_CAST(gss_auth); 1234eb6dc19dSTrond Myklebust return &gss_auth->rpc_auth; 1235eb6dc19dSTrond Myklebust } 1236eb6dc19dSTrond Myklebust 1237a652a4bcSTrond Myklebust static struct gss_cred * 1238a652a4bcSTrond Myklebust gss_dup_cred(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 1239a652a4bcSTrond Myklebust { 1240a652a4bcSTrond Myklebust struct gss_cred *new; 1241a652a4bcSTrond Myklebust 1242a652a4bcSTrond Myklebust /* Make a copy of the cred so that we can reference count it */ 124312a3ad61STrond Myklebust new = kzalloc(sizeof(*gss_cred), GFP_NOFS); 1244a652a4bcSTrond Myklebust if (new) { 1245a652a4bcSTrond Myklebust struct auth_cred acred = { 12468276c902SNeilBrown .cred = gss_cred->gc_base.cr_cred, 1247a652a4bcSTrond Myklebust }; 1248a652a4bcSTrond Myklebust struct gss_cl_ctx *ctx = 1249a652a4bcSTrond Myklebust rcu_dereference_protected(gss_cred->gc_ctx, 1); 1250a652a4bcSTrond Myklebust 1251a652a4bcSTrond Myklebust rpcauth_init_cred(&new->gc_base, &acred, 1252a652a4bcSTrond Myklebust &gss_auth->rpc_auth, 1253a652a4bcSTrond Myklebust &gss_nullops); 1254a652a4bcSTrond Myklebust new->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE; 1255a652a4bcSTrond Myklebust new->gc_service = gss_cred->gc_service; 1256a652a4bcSTrond Myklebust new->gc_principal = gss_cred->gc_principal; 1257a652a4bcSTrond Myklebust kref_get(&gss_auth->kref); 1258a652a4bcSTrond Myklebust rcu_assign_pointer(new->gc_ctx, ctx); 1259a652a4bcSTrond Myklebust gss_get_ctx(ctx); 1260a652a4bcSTrond Myklebust } 1261a652a4bcSTrond Myklebust return new; 1262a652a4bcSTrond Myklebust } 1263a652a4bcSTrond Myklebust 12640df7fb74STrond Myklebust /* 1265a652a4bcSTrond Myklebust * gss_send_destroy_context will cause the RPCSEC_GSS to send a NULL RPC call 12660df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 12670df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 12680df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 12690df7fb74STrond Myklebust */ 1270a652a4bcSTrond Myklebust static void 1271a652a4bcSTrond Myklebust gss_send_destroy_context(struct rpc_cred *cred) 12720df7fb74STrond Myklebust { 12730df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12740df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1275c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 1276a652a4bcSTrond Myklebust struct gss_cred *new; 12770df7fb74STrond Myklebust struct rpc_task *task; 12780df7fb74STrond Myklebust 1279a652a4bcSTrond Myklebust new = gss_dup_cred(gss_auth, gss_cred); 1280a652a4bcSTrond Myklebust if (new) { 1281c5e6aecdSJeff Layton ctx->gc_proc = RPC_GSS_PROC_DESTROY; 12820df7fb74STrond Myklebust 1283a652a4bcSTrond Myklebust task = rpc_call_null(gss_auth->client, &new->gc_base, 1284a652a4bcSTrond Myklebust RPC_TASK_ASYNC|RPC_TASK_SOFT); 12850df7fb74STrond Myklebust if (!IS_ERR(task)) 12860df7fb74STrond Myklebust rpc_put_task(task); 12870df7fb74STrond Myklebust 1288a652a4bcSTrond Myklebust put_rpccred(&new->gc_base); 1289a652a4bcSTrond Myklebust } 12900df7fb74STrond Myklebust } 12910df7fb74STrond Myklebust 12920df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 12931da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 12941da177e4SLinus Torvalds * allocated before freeing them. */ 12951da177e4SLinus Torvalds static void 12965d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 12971da177e4SLinus Torvalds { 12980d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 12991da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 13002004c726SJeff Layton kfree(ctx->gc_acceptor.data); 13011da177e4SLinus Torvalds kfree(ctx); 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds static void 13055d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 13065d28dc82STrond Myklebust { 13075d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 13085d28dc82STrond Myklebust gss_do_free_ctx(ctx); 13095d28dc82STrond Myklebust } 13105d28dc82STrond Myklebust 13115d28dc82STrond Myklebust static void 13125d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 13135d28dc82STrond Myklebust { 13145d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 13155d28dc82STrond Myklebust } 13165d28dc82STrond Myklebust 13175d28dc82STrond Myklebust static void 131831be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 13191da177e4SLinus Torvalds { 132031be5bf1STrond Myklebust kfree(gss_cred); 132131be5bf1STrond Myklebust } 13221da177e4SLinus Torvalds 132331be5bf1STrond Myklebust static void 132431be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 132531be5bf1STrond Myklebust { 132631be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 132731be5bf1STrond Myklebust gss_free_cred(gss_cred); 132831be5bf1STrond Myklebust } 13291da177e4SLinus Torvalds 133031be5bf1STrond Myklebust static void 13316dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 133231be5bf1STrond Myklebust { 13335d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 13340285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1335c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 13365d28dc82STrond Myklebust 1337a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 133897f68c6bSNeilBrown put_cred(cred->cr_cred); 133931be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 13405d28dc82STrond Myklebust if (ctx) 13415d28dc82STrond Myklebust gss_put_ctx(ctx); 13429eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 13431da177e4SLinus Torvalds } 13441da177e4SLinus Torvalds 13456dcd3926SJeff Layton static void 13466dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 13476dcd3926SJeff Layton { 13486dcd3926SJeff Layton 1349a652a4bcSTrond Myklebust if (test_and_clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) 1350a652a4bcSTrond Myklebust gss_send_destroy_context(cred); 13516dcd3926SJeff Layton gss_destroy_nullcred(cred); 13526dcd3926SJeff Layton } 13536dcd3926SJeff Layton 1354a960f8d6SFrank Sorenson static int 1355a960f8d6SFrank Sorenson gss_hash_cred(struct auth_cred *acred, unsigned int hashbits) 1356a960f8d6SFrank Sorenson { 13578276c902SNeilBrown return hash_64(from_kuid(&init_user_ns, acred->cred->fsuid), hashbits); 1358a960f8d6SFrank Sorenson } 1359a960f8d6SFrank Sorenson 13601da177e4SLinus Torvalds /* 13611da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 13621da177e4SLinus Torvalds */ 13631da177e4SLinus Torvalds static struct rpc_cred * 13648a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 13651da177e4SLinus Torvalds { 13663c6e0bc8SJeff Layton return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); 13671da177e4SLinus Torvalds } 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds static struct rpc_cred * 13703c6e0bc8SJeff Layton gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) 13711da177e4SLinus Torvalds { 13721da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 13731da177e4SLinus Torvalds struct gss_cred *cred = NULL; 13741da177e4SLinus Torvalds int err = -ENOMEM; 13751da177e4SLinus Torvalds 13763c6e0bc8SJeff Layton if (!(cred = kzalloc(sizeof(*cred), gfp))) 13771da177e4SLinus Torvalds goto out_err; 13781da177e4SLinus Torvalds 13795fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 13801da177e4SLinus Torvalds /* 13811da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 13821da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 13831da177e4SLinus Torvalds */ 1384fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 13851da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 138668c97153STrond Myklebust cred->gc_principal = acred->principal; 13870285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 13881da177e4SLinus Torvalds return &cred->gc_base; 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds out_err: 13911da177e4SLinus Torvalds return ERR_PTR(err); 13921da177e4SLinus Torvalds } 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds static int 1395fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1396fba3bad4STrond Myklebust { 1397fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1398fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1399fba3bad4STrond Myklebust int err; 1400fba3bad4STrond Myklebust 1401fba3bad4STrond Myklebust do { 1402fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1403fba3bad4STrond Myklebust } while (err == -EAGAIN); 1404fba3bad4STrond Myklebust return err; 1405fba3bad4STrond Myklebust } 1406fba3bad4STrond Myklebust 1407a0337d1dSJeff Layton static char * 1408a0337d1dSJeff Layton gss_stringify_acceptor(struct rpc_cred *cred) 1409a0337d1dSJeff Layton { 1410c5e6aecdSJeff Layton char *string = NULL; 1411a0337d1dSJeff Layton struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1412c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1413b3ecba09SJeff Layton unsigned int len; 1414c5e6aecdSJeff Layton struct xdr_netobj *acceptor; 1415c5e6aecdSJeff Layton 1416c5e6aecdSJeff Layton rcu_read_lock(); 1417c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1418c5e6aecdSJeff Layton if (!ctx) 1419c5e6aecdSJeff Layton goto out; 1420c5e6aecdSJeff Layton 1421b3ecba09SJeff Layton len = ctx->gc_acceptor.len; 1422b3ecba09SJeff Layton rcu_read_unlock(); 1423a0337d1dSJeff Layton 1424a0337d1dSJeff Layton /* no point if there's no string */ 1425b3ecba09SJeff Layton if (!len) 1426b3ecba09SJeff Layton return NULL; 1427b3ecba09SJeff Layton realloc: 1428b3ecba09SJeff Layton string = kmalloc(len + 1, GFP_KERNEL); 1429a0337d1dSJeff Layton if (!string) 1430b3ecba09SJeff Layton return NULL; 1431b3ecba09SJeff Layton 1432b3ecba09SJeff Layton rcu_read_lock(); 1433b3ecba09SJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1434b3ecba09SJeff Layton 1435b3ecba09SJeff Layton /* did the ctx disappear or was it replaced by one with no acceptor? */ 1436b3ecba09SJeff Layton if (!ctx || !ctx->gc_acceptor.len) { 1437b3ecba09SJeff Layton kfree(string); 1438b3ecba09SJeff Layton string = NULL; 1439c5e6aecdSJeff Layton goto out; 1440b3ecba09SJeff Layton } 1441b3ecba09SJeff Layton 1442b3ecba09SJeff Layton acceptor = &ctx->gc_acceptor; 1443b3ecba09SJeff Layton 1444b3ecba09SJeff Layton /* 1445b3ecba09SJeff Layton * Did we find a new acceptor that's longer than the original? Allocate 1446b3ecba09SJeff Layton * a longer buffer and try again. 1447b3ecba09SJeff Layton */ 1448b3ecba09SJeff Layton if (len < acceptor->len) { 1449b3ecba09SJeff Layton len = acceptor->len; 1450b3ecba09SJeff Layton rcu_read_unlock(); 1451b3ecba09SJeff Layton kfree(string); 1452b3ecba09SJeff Layton goto realloc; 1453b3ecba09SJeff Layton } 1454a0337d1dSJeff Layton 1455a0337d1dSJeff Layton memcpy(string, acceptor->data, acceptor->len); 1456a0337d1dSJeff Layton string[acceptor->len] = '\0'; 1457c5e6aecdSJeff Layton out: 1458c5e6aecdSJeff Layton rcu_read_unlock(); 1459a0337d1dSJeff Layton return string; 1460a0337d1dSJeff Layton } 1461a0337d1dSJeff Layton 14624de6caa2SAndy Adamson /* 14634de6caa2SAndy Adamson * Returns -EACCES if GSS context is NULL or will expire within the 14644de6caa2SAndy Adamson * timeout (miliseconds) 14654de6caa2SAndy Adamson */ 14664de6caa2SAndy Adamson static int 14674de6caa2SAndy Adamson gss_key_timeout(struct rpc_cred *rc) 14684de6caa2SAndy Adamson { 14694de6caa2SAndy Adamson struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1470c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1471cc6a7aabSArnd Bergmann unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); 1472cc6a7aabSArnd Bergmann int ret = 0; 14734de6caa2SAndy Adamson 1474c5e6aecdSJeff Layton rcu_read_lock(); 1475c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1476cc6a7aabSArnd Bergmann if (!ctx || time_after(timeout, ctx->gc_expiry)) 1477cc6a7aabSArnd Bergmann ret = -EACCES; 1478c5e6aecdSJeff Layton rcu_read_unlock(); 1479cc6a7aabSArnd Bergmann 1480cc6a7aabSArnd Bergmann return ret; 14814de6caa2SAndy Adamson } 14824de6caa2SAndy Adamson 1483fba3bad4STrond Myklebust static int 14848a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 14851da177e4SLinus Torvalds { 14861da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1487c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 14884de6caa2SAndy Adamson int ret; 14891da177e4SLinus Torvalds 1490cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 14918a317760STrond Myklebust goto out; 14921da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1493c5e6aecdSJeff Layton rcu_read_lock(); 1494c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1495c5e6aecdSJeff Layton if (!ctx || time_after(jiffies, ctx->gc_expiry)) { 1496c5e6aecdSJeff Layton rcu_read_unlock(); 1497cd019f75STrond Myklebust return 0; 1498c5e6aecdSJeff Layton } 1499c5e6aecdSJeff Layton rcu_read_unlock(); 1500cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 15011da177e4SLinus Torvalds return 0; 15028a317760STrond Myklebust out: 150368c97153STrond Myklebust if (acred->principal != NULL) { 150468c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 150568c97153STrond Myklebust return 0; 15064de6caa2SAndy Adamson ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; 1507ddf529eeSNeilBrown } else { 150868c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 15097c67db3aSTrond Myklebust return 0; 151004d1532bSNeilBrown ret = uid_eq(rc->cr_cred->fsuid, acred->cred->fsuid); 15114de6caa2SAndy Adamson } 15124de6caa2SAndy Adamson return ret; 15131da177e4SLinus Torvalds } 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds /* 15161da177e4SLinus Torvalds * Marshal credentials. 1517e8680a24SChuck Lever * 1518e8680a24SChuck Lever * The expensive part is computing the verifier. We can't cache a 1519e8680a24SChuck Lever * pre-computed version of the verifier because the seqno, which 1520e8680a24SChuck Lever * is different every time, is included in the MIC. 15211da177e4SLinus Torvalds */ 1522e8680a24SChuck Lever static int gss_marshal(struct rpc_task *task, struct xdr_stream *xdr) 15231da177e4SLinus Torvalds { 1524a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1525a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 15261da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15271da177e4SLinus Torvalds gc_base); 15281da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1529e8680a24SChuck Lever __be32 *p, *cred_len; 15301da177e4SLinus Torvalds u32 maj_stat = 0; 15311da177e4SLinus Torvalds struct xdr_netobj mic; 15321da177e4SLinus Torvalds struct kvec iov; 15331da177e4SLinus Torvalds struct xdr_buf verf_buf; 15340c77668dSChuck Lever int status; 15351da177e4SLinus Torvalds 1536e8680a24SChuck Lever /* Credential */ 1537e8680a24SChuck Lever 1538e8680a24SChuck Lever p = xdr_reserve_space(xdr, 7 * sizeof(*p) + 1539e8680a24SChuck Lever ctx->gc_wire_ctx.len); 1540e8680a24SChuck Lever if (!p) 15410c77668dSChuck Lever goto marshal_failed; 1542e8680a24SChuck Lever *p++ = rpc_auth_gss; 15431da177e4SLinus Torvalds cred_len = p++; 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 154697b78ae9STrond Myklebust req->rq_seqno = (ctx->gc_seq < MAXSEQ) ? ctx->gc_seq++ : MAXSEQ; 15471da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 154897b78ae9STrond Myklebust if (req->rq_seqno == MAXSEQ) 15490c77668dSChuck Lever goto expired; 15500c77668dSChuck Lever trace_rpcgss_seqno(task); 15511da177e4SLinus Torvalds 1552e8680a24SChuck Lever *p++ = cpu_to_be32(RPC_GSS_VERSION); 1553e8680a24SChuck Lever *p++ = cpu_to_be32(ctx->gc_proc); 1554e8680a24SChuck Lever *p++ = cpu_to_be32(req->rq_seqno); 1555e8680a24SChuck Lever *p++ = cpu_to_be32(gss_cred->gc_service); 15561da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 1557e8680a24SChuck Lever *cred_len = cpu_to_be32((p - (cred_len + 1)) << 2); 1558e8680a24SChuck Lever 1559e8680a24SChuck Lever /* Verifier */ 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 15621da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1563067fb11bSChuck Lever iov.iov_base = req->rq_snd_buf.head[0].iov_base; 15641da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 15651da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 15661da177e4SLinus Torvalds 1567e8680a24SChuck Lever p = xdr_reserve_space(xdr, sizeof(*p)); 1568e8680a24SChuck Lever if (!p) 15690c77668dSChuck Lever goto marshal_failed; 1570e8680a24SChuck Lever *p++ = rpc_auth_gss; 15711da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 157200fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 1573e8680a24SChuck Lever if (maj_stat == GSS_S_CONTEXT_EXPIRED) 15740c77668dSChuck Lever goto expired; 1575e8680a24SChuck Lever else if (maj_stat != 0) 15760c77668dSChuck Lever goto bad_mic; 1577e8680a24SChuck Lever if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) 15780c77668dSChuck Lever goto marshal_failed; 15790c77668dSChuck Lever status = 0; 15800c77668dSChuck Lever out: 15811da177e4SLinus Torvalds gss_put_ctx(ctx); 15820c77668dSChuck Lever return status; 15830c77668dSChuck Lever expired: 158497b78ae9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15850c77668dSChuck Lever status = -EKEYEXPIRED; 15860c77668dSChuck Lever goto out; 15870c77668dSChuck Lever marshal_failed: 15880c77668dSChuck Lever status = -EMSGSIZE; 15890c77668dSChuck Lever goto out; 15900c77668dSChuck Lever bad_mic: 15910c77668dSChuck Lever trace_rpcgss_get_mic(task, maj_stat); 15920c77668dSChuck Lever status = -EIO; 15930c77668dSChuck Lever goto out; 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds 1596cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1597cd019f75STrond Myklebust { 1598a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1599cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1600cd019f75STrond Myklebust struct gss_cred, 1601cd019f75STrond Myklebust gc_base); 1602cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1603cd019f75STrond Myklebust struct auth_cred acred = { 160497f68c6bSNeilBrown .cred = oldcred->cr_cred, 160568c97153STrond Myklebust .principal = gss_cred->gc_principal, 1606cd019f75STrond Myklebust }; 1607cd019f75STrond Myklebust struct rpc_cred *new; 1608cd019f75STrond Myklebust 1609cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1610cd019f75STrond Myklebust if (IS_ERR(new)) 1611cd019f75STrond Myklebust return PTR_ERR(new); 1612a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1613cd019f75STrond Myklebust put_rpccred(oldcred); 1614cd019f75STrond Myklebust return 0; 1615cd019f75STrond Myklebust } 1616cd019f75STrond Myklebust 1617126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1618126e216aSTrond Myklebust { 1619126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1620126e216aSTrond Myklebust unsigned long now = jiffies; 1621126e216aSTrond Myklebust unsigned long begin, expire; 1622126e216aSTrond Myklebust struct gss_cred *gss_cred; 1623126e216aSTrond Myklebust 1624126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1625126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1626126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1627126e216aSTrond Myklebust 1628126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1629126e216aSTrond Myklebust return 1; 1630126e216aSTrond Myklebust } 1631126e216aSTrond Myklebust return 0; 1632126e216aSTrond Myklebust } 1633126e216aSTrond Myklebust 16341da177e4SLinus Torvalds /* 16351da177e4SLinus Torvalds * Refresh credentials. XXX - finish 16361da177e4SLinus Torvalds */ 16371da177e4SLinus Torvalds static int 16381da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 16391da177e4SLinus Torvalds { 1640a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1641cd019f75STrond Myklebust int ret = 0; 16421da177e4SLinus Torvalds 1643126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1644126e216aSTrond Myklebust return -EKEYEXPIRED; 1645126e216aSTrond Myklebust 1646cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1647cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1648cd019f75STrond Myklebust ret = gss_renew_cred(task); 1649cd019f75STrond Myklebust if (ret < 0) 1650cd019f75STrond Myklebust goto out; 1651a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1652cd019f75STrond Myklebust } 1653cd019f75STrond Myklebust 1654cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1655cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1656cd019f75STrond Myklebust out: 1657cd019f75STrond Myklebust return ret; 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds 16600df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 16610df7fb74STrond Myklebust static int 16620df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 16630df7fb74STrond Myklebust { 1664c297c8b9SAndy Adamson return 0; 16650df7fb74STrond Myklebust } 16660df7fb74STrond Myklebust 1667a0584ee9SChuck Lever static int 1668a0584ee9SChuck Lever gss_validate(struct rpc_task *task, struct xdr_stream *xdr) 16691da177e4SLinus Torvalds { 1670a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16711da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1672a0584ee9SChuck Lever __be32 *p, *seq = NULL; 16731da177e4SLinus Torvalds struct kvec iov; 16741da177e4SLinus Torvalds struct xdr_buf verf_buf; 16751da177e4SLinus Torvalds struct xdr_netobj mic; 1676a0584ee9SChuck Lever u32 len, maj_stat; 1677a0584ee9SChuck Lever int status; 16781da177e4SLinus Torvalds 1679a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1680a0584ee9SChuck Lever if (!p) 1681a0584ee9SChuck Lever goto validate_failed; 1682a0584ee9SChuck Lever if (*p++ != rpc_auth_gss) 1683a0584ee9SChuck Lever goto validate_failed; 1684a0584ee9SChuck Lever len = be32_to_cpup(p); 1685a0584ee9SChuck Lever if (len > RPC_MAX_AUTH_SIZE) 1686a0584ee9SChuck Lever goto validate_failed; 1687a0584ee9SChuck Lever p = xdr_inline_decode(xdr, len); 1688a0584ee9SChuck Lever if (!p) 1689a0584ee9SChuck Lever goto validate_failed; 16901da177e4SLinus Torvalds 16912876a344SJ. Bruce Fields seq = kmalloc(4, GFP_NOFS); 16922876a344SJ. Bruce Fields if (!seq) 1693a0584ee9SChuck Lever goto validate_failed; 1694a0584ee9SChuck Lever *seq = cpu_to_be32(task->tk_rqstp->rq_seqno); 16952876a344SJ. Bruce Fields iov.iov_base = seq; 16962876a344SJ. Bruce Fields iov.iov_len = 4; 16971da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 16981da177e4SLinus Torvalds mic.data = (u8 *)p; 16991da177e4SLinus Torvalds mic.len = len; 170000fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 17011da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1702fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1703a0584ee9SChuck Lever if (maj_stat) 1704a0584ee9SChuck Lever goto bad_mic; 1705a0584ee9SChuck Lever 170624b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 170724b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 17081be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 1709a0584ee9SChuck Lever status = 0; 1710a0584ee9SChuck Lever out: 17111da177e4SLinus Torvalds gss_put_ctx(ctx); 17122876a344SJ. Bruce Fields kfree(seq); 1713a0584ee9SChuck Lever return status; 1714a0584ee9SChuck Lever 1715a0584ee9SChuck Lever validate_failed: 1716a0584ee9SChuck Lever status = -EIO; 1717a0584ee9SChuck Lever goto out; 1718a0584ee9SChuck Lever bad_mic: 17190c77668dSChuck Lever trace_rpcgss_verify_mic(task, maj_stat); 1720a0584ee9SChuck Lever status = -EACCES; 1721a0584ee9SChuck Lever goto out; 17221da177e4SLinus Torvalds } 17231da177e4SLinus Torvalds 1724e8680a24SChuck Lever static int gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1725e8680a24SChuck Lever struct rpc_task *task, struct xdr_stream *xdr) 17269f06c719SChuck Lever { 1727e8680a24SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 1728e8680a24SChuck Lever struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf; 17291da177e4SLinus Torvalds struct xdr_netobj mic; 1730e8680a24SChuck Lever __be32 *p, *integ_len; 1731e8680a24SChuck Lever u32 offset, maj_stat; 17321da177e4SLinus Torvalds 1733e8680a24SChuck Lever p = xdr_reserve_space(xdr, 2 * sizeof(*p)); 1734e8680a24SChuck Lever if (!p) 1735e8680a24SChuck Lever goto wrap_failed; 17361da177e4SLinus Torvalds integ_len = p++; 1737e8680a24SChuck Lever *p = cpu_to_be32(rqstp->rq_seqno); 1738e8680a24SChuck Lever 1739e8680a24SChuck Lever if (rpcauth_wrap_req_encode(task, xdr)) 1740e8680a24SChuck Lever goto wrap_failed; 1741e8680a24SChuck Lever 17421da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17431da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 17441da177e4SLinus Torvalds offset, snd_buf->len - offset)) 1745e8680a24SChuck Lever goto wrap_failed; 1746e8680a24SChuck Lever *integ_len = cpu_to_be32(integ_buf.len); 17471da177e4SLinus Torvalds 1748e8680a24SChuck Lever p = xdr_reserve_space(xdr, 0); 1749e8680a24SChuck Lever if (!p) 1750e8680a24SChuck Lever goto wrap_failed; 17511da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 175200fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 17531da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1754fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 17551da177e4SLinus Torvalds else if (maj_stat) 17560c77668dSChuck Lever goto bad_mic; 1757e8680a24SChuck Lever /* Check that the trailing MIC fit in the buffer, after the fact */ 1758e8680a24SChuck Lever if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) 1759e8680a24SChuck Lever goto wrap_failed; 17601da177e4SLinus Torvalds return 0; 1761e8680a24SChuck Lever wrap_failed: 1762e8680a24SChuck Lever return -EMSGSIZE; 17630c77668dSChuck Lever bad_mic: 17640c77668dSChuck Lever trace_rpcgss_get_mic(task, maj_stat); 17650c77668dSChuck Lever return -EIO; 17661da177e4SLinus Torvalds } 17671da177e4SLinus Torvalds 17682d2da60cSJ. Bruce Fields static void 17692d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 17702d2da60cSJ. Bruce Fields { 17712d2da60cSJ. Bruce Fields int i; 17722d2da60cSJ. Bruce Fields 17732d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 17742d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 17752d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 17768dae5398SChuck Lever rqstp->rq_release_snd_buf = NULL; 17772d2da60cSJ. Bruce Fields } 17782d2da60cSJ. Bruce Fields 17792d2da60cSJ. Bruce Fields static int 17802d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 17812d2da60cSJ. Bruce Fields { 17822d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17832d2da60cSJ. Bruce Fields int first, last, i; 17842d2da60cSJ. Bruce Fields 17858dae5398SChuck Lever if (rqstp->rq_release_snd_buf) 17868dae5398SChuck Lever rqstp->rq_release_snd_buf(rqstp); 17878dae5398SChuck Lever 17882d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 17892d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 17902d2da60cSJ. Bruce Fields return 0; 17912d2da60cSJ. Bruce Fields } 17922d2da60cSJ. Bruce Fields 179309cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 179409cbfeafSKirill A. Shutemov last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; 17952d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 17962d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 17976da2ec56SKees Cook = kmalloc_array(rqstp->rq_enc_pages_num, 17986da2ec56SKees Cook sizeof(struct page *), 17992d2da60cSJ. Bruce Fields GFP_NOFS); 18002d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 18012d2da60cSJ. Bruce Fields goto out; 18022d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 18032d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 18042d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 18052d2da60cSJ. Bruce Fields goto out_free; 18062d2da60cSJ. Bruce Fields } 18072d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 18082d2da60cSJ. Bruce Fields return 0; 18092d2da60cSJ. Bruce Fields out_free: 1810cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1811cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 18122d2da60cSJ. Bruce Fields out: 18132d2da60cSJ. Bruce Fields return -EAGAIN; 18142d2da60cSJ. Bruce Fields } 18152d2da60cSJ. Bruce Fields 1816e8680a24SChuck Lever static int gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1817e8680a24SChuck Lever struct rpc_task *task, struct xdr_stream *xdr) 18182d2da60cSJ. Bruce Fields { 1819e8680a24SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 18202d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1821e8680a24SChuck Lever u32 pad, offset, maj_stat; 18222d2da60cSJ. Bruce Fields int status; 1823e8680a24SChuck Lever __be32 *p, *opaque_len; 18242d2da60cSJ. Bruce Fields struct page **inpages; 18252d2da60cSJ. Bruce Fields int first; 18262d2da60cSJ. Bruce Fields struct kvec *iov; 18272d2da60cSJ. Bruce Fields 1828e8680a24SChuck Lever status = -EIO; 1829e8680a24SChuck Lever p = xdr_reserve_space(xdr, 2 * sizeof(*p)); 1830e8680a24SChuck Lever if (!p) 1831e8680a24SChuck Lever goto wrap_failed; 18322d2da60cSJ. Bruce Fields opaque_len = p++; 1833e8680a24SChuck Lever *p = cpu_to_be32(rqstp->rq_seqno); 18342d2da60cSJ. Bruce Fields 1835e8680a24SChuck Lever if (rpcauth_wrap_req_encode(task, xdr)) 1836e8680a24SChuck Lever goto wrap_failed; 18372d2da60cSJ. Bruce Fields 18382d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 1839e8680a24SChuck Lever if (unlikely(status)) 1840e8680a24SChuck Lever goto wrap_failed; 184109cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 18422d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 18432d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 184409cbfeafSKirill A. Shutemov snd_buf->page_base -= first << PAGE_SHIFT; 18457561042fSKevin Coffman /* 1846e8680a24SChuck Lever * Move the tail into its own page, in case gss_wrap needs 1847e8680a24SChuck Lever * more space in the head when wrapping. 18487561042fSKevin Coffman * 1849e8680a24SChuck Lever * Still... Why can't gss_wrap just slide the tail down? 18507561042fSKevin Coffman */ 18512d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 1852e8680a24SChuck Lever char *tmp; 1853e8680a24SChuck Lever 18542d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 18552d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 18562d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 18572d2da60cSJ. Bruce Fields } 1858e8680a24SChuck Lever offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 185900fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 18607561042fSKevin Coffman /* slack space should prevent this ever happening: */ 1861e8680a24SChuck Lever if (unlikely(snd_buf->len > snd_buf->buflen)) 1862e8680a24SChuck Lever goto wrap_failed; 18632d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 18642d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 18652d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1866fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18672d2da60cSJ. Bruce Fields else if (maj_stat) 18680c77668dSChuck Lever goto bad_wrap; 18692d2da60cSJ. Bruce Fields 1870e8680a24SChuck Lever *opaque_len = cpu_to_be32(snd_buf->len - offset); 1871e8680a24SChuck Lever /* guess whether the pad goes into the head or the tail: */ 18722d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 18732d2da60cSJ. Bruce Fields iov = snd_buf->tail; 18742d2da60cSJ. Bruce Fields else 18752d2da60cSJ. Bruce Fields iov = snd_buf->head; 18762d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 18772d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 18782d2da60cSJ. Bruce Fields memset(p, 0, pad); 18792d2da60cSJ. Bruce Fields iov->iov_len += pad; 18802d2da60cSJ. Bruce Fields snd_buf->len += pad; 18812d2da60cSJ. Bruce Fields 18822d2da60cSJ. Bruce Fields return 0; 1883e8680a24SChuck Lever wrap_failed: 1884e8680a24SChuck Lever return status; 18850c77668dSChuck Lever bad_wrap: 18860c77668dSChuck Lever trace_rpcgss_wrap(task, maj_stat); 18870c77668dSChuck Lever return -EIO; 18882d2da60cSJ. Bruce Fields } 18892d2da60cSJ. Bruce Fields 1890e8680a24SChuck Lever static int gss_wrap_req(struct rpc_task *task, struct xdr_stream *xdr) 18911da177e4SLinus Torvalds { 1892a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 18931da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 18941da177e4SLinus Torvalds gc_base); 18951da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1896e8680a24SChuck Lever int status; 18971da177e4SLinus Torvalds 1898e8680a24SChuck Lever status = -EIO; 18991da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 19001da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 19011da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 19021da177e4SLinus Torvalds */ 1903e8680a24SChuck Lever status = rpcauth_wrap_req_encode(task, xdr); 19041da177e4SLinus Torvalds goto out; 19051da177e4SLinus Torvalds } 19061da177e4SLinus Torvalds switch (gss_cred->gc_service) { 19071da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 1908e8680a24SChuck Lever status = rpcauth_wrap_req_encode(task, xdr); 19091da177e4SLinus Torvalds break; 19101da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 1911e8680a24SChuck Lever status = gss_wrap_req_integ(cred, ctx, task, xdr); 19121da177e4SLinus Torvalds break; 19131da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 1914e8680a24SChuck Lever status = gss_wrap_req_priv(cred, ctx, task, xdr); 19151da177e4SLinus Torvalds break; 19160c77668dSChuck Lever default: 19170c77668dSChuck Lever status = -EIO; 19181da177e4SLinus Torvalds } 19191da177e4SLinus Torvalds out: 19201da177e4SLinus Torvalds gss_put_ctx(ctx); 19211da177e4SLinus Torvalds return status; 19221da177e4SLinus Torvalds } 19231da177e4SLinus Torvalds 1924a0584ee9SChuck Lever static int 1925a0584ee9SChuck Lever gss_unwrap_resp_auth(struct rpc_cred *cred) 19261da177e4SLinus Torvalds { 192735e77d21SChuck Lever struct rpc_auth *auth = cred->cr_auth; 192835e77d21SChuck Lever 192935e77d21SChuck Lever auth->au_rslack = auth->au_verfsize; 193035e77d21SChuck Lever auth->au_ralign = auth->au_verfsize; 1931a0584ee9SChuck Lever return 0; 1932a0584ee9SChuck Lever } 19331da177e4SLinus Torvalds 1934a0584ee9SChuck Lever static int 19350c77668dSChuck Lever gss_unwrap_resp_integ(struct rpc_task *task, struct rpc_cred *cred, 19360c77668dSChuck Lever struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, 19370c77668dSChuck Lever struct xdr_stream *xdr) 1938a0584ee9SChuck Lever { 1939a0584ee9SChuck Lever struct xdr_buf integ_buf, *rcv_buf = &rqstp->rq_rcv_buf; 1940a0584ee9SChuck Lever u32 data_offset, mic_offset, integ_len, maj_stat; 194135e77d21SChuck Lever struct rpc_auth *auth = cred->cr_auth; 1942a0584ee9SChuck Lever struct xdr_netobj mic; 1943a0584ee9SChuck Lever __be32 *p; 1944a0584ee9SChuck Lever 1945a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1946a0584ee9SChuck Lever if (unlikely(!p)) 1947a0584ee9SChuck Lever goto unwrap_failed; 1948a0584ee9SChuck Lever integ_len = be32_to_cpup(p++); 19491da177e4SLinus Torvalds if (integ_len & 3) 1950a0584ee9SChuck Lever goto unwrap_failed; 1951a0584ee9SChuck Lever data_offset = (u8 *)(p) - (u8 *)rcv_buf->head[0].iov_base; 19521da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 19531da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 1954a0584ee9SChuck Lever goto unwrap_failed; 1955a0584ee9SChuck Lever if (be32_to_cpup(p) != rqstp->rq_seqno) 19560c77668dSChuck Lever goto bad_seqno; 19571da177e4SLinus Torvalds 1958a0584ee9SChuck Lever if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, integ_len)) 1959a0584ee9SChuck Lever goto unwrap_failed; 19601da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 1961a0584ee9SChuck Lever goto unwrap_failed; 196200fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 19631da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1964fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19651da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 1966a0584ee9SChuck Lever goto bad_mic; 1967a0584ee9SChuck Lever 196835e77d21SChuck Lever auth->au_rslack = auth->au_verfsize + 2 + 1 + XDR_QUADLEN(mic.len); 196935e77d21SChuck Lever auth->au_ralign = auth->au_verfsize + 2; 19701da177e4SLinus Torvalds return 0; 1971a0584ee9SChuck Lever unwrap_failed: 19720c77668dSChuck Lever trace_rpcgss_unwrap_failed(task); 19730c77668dSChuck Lever return -EIO; 19740c77668dSChuck Lever bad_seqno: 19750c77668dSChuck Lever trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(p)); 1976a0584ee9SChuck Lever return -EIO; 1977a0584ee9SChuck Lever bad_mic: 19780c77668dSChuck Lever trace_rpcgss_verify_mic(task, maj_stat); 1979a0584ee9SChuck Lever return -EIO; 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds 1982a0584ee9SChuck Lever static int 19830c77668dSChuck Lever gss_unwrap_resp_priv(struct rpc_task *task, struct rpc_cred *cred, 19840c77668dSChuck Lever struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, 19850c77668dSChuck Lever struct xdr_stream *xdr) 19862d2da60cSJ. Bruce Fields { 19872d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1988a0584ee9SChuck Lever struct kvec *head = rqstp->rq_rcv_buf.head; 198935e77d21SChuck Lever struct rpc_auth *auth = cred->cr_auth; 1990a0584ee9SChuck Lever unsigned int savedlen = rcv_buf->len; 1991a0584ee9SChuck Lever u32 offset, opaque_len, maj_stat; 1992a0584ee9SChuck Lever __be32 *p; 19932d2da60cSJ. Bruce Fields 1994a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1995a0584ee9SChuck Lever if (unlikely(!p)) 1996a0584ee9SChuck Lever goto unwrap_failed; 1997a0584ee9SChuck Lever opaque_len = be32_to_cpup(p++); 1998a0584ee9SChuck Lever offset = (u8 *)(p) - (u8 *)head->iov_base; 19992d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 2000a0584ee9SChuck Lever goto unwrap_failed; 20012d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 20022d2da60cSJ. Bruce Fields 200300fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 20042d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 2005fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 20062d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 2007a0584ee9SChuck Lever goto bad_unwrap; 2008a0584ee9SChuck Lever /* gss_unwrap decrypted the sequence number */ 2009a0584ee9SChuck Lever if (be32_to_cpup(p++) != rqstp->rq_seqno) 20100c77668dSChuck Lever goto bad_seqno; 20112d2da60cSJ. Bruce Fields 2012a0584ee9SChuck Lever /* gss_unwrap redacts the opaque blob from the head iovec. 2013a0584ee9SChuck Lever * rcv_buf has changed, thus the stream needs to be reset. 2014a0584ee9SChuck Lever */ 2015a0584ee9SChuck Lever xdr_init_decode(xdr, rcv_buf, p, rqstp); 2016a0584ee9SChuck Lever 201735e77d21SChuck Lever auth->au_rslack = auth->au_verfsize + 2 + 201835e77d21SChuck Lever XDR_QUADLEN(savedlen - rcv_buf->len); 201935e77d21SChuck Lever auth->au_ralign = auth->au_verfsize + 2 + 2020a0584ee9SChuck Lever XDR_QUADLEN(savedlen - rcv_buf->len); 20212d2da60cSJ. Bruce Fields return 0; 2022a0584ee9SChuck Lever unwrap_failed: 20230c77668dSChuck Lever trace_rpcgss_unwrap_failed(task); 20240c77668dSChuck Lever return -EIO; 20250c77668dSChuck Lever bad_seqno: 20260c77668dSChuck Lever trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(--p)); 2027a0584ee9SChuck Lever return -EIO; 2028a0584ee9SChuck Lever bad_unwrap: 20290c77668dSChuck Lever trace_rpcgss_unwrap(task, maj_stat); 2030a0584ee9SChuck Lever return -EIO; 2031bf269551SChuck Lever } 20322d2da60cSJ. Bruce Fields 20333021a5bbSTrond Myklebust static bool 20343021a5bbSTrond Myklebust gss_seq_is_newer(u32 new, u32 old) 20353021a5bbSTrond Myklebust { 20363021a5bbSTrond Myklebust return (s32)(new - old) > 0; 20373021a5bbSTrond Myklebust } 20383021a5bbSTrond Myklebust 20393021a5bbSTrond Myklebust static bool 20403021a5bbSTrond Myklebust gss_xmit_need_reencode(struct rpc_task *task) 20413021a5bbSTrond Myklebust { 20423021a5bbSTrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 20433021a5bbSTrond Myklebust struct rpc_cred *cred = req->rq_cred; 20443021a5bbSTrond Myklebust struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20450c77668dSChuck Lever u32 win, seq_xmit = 0; 20463021a5bbSTrond Myklebust bool ret = true; 20473021a5bbSTrond Myklebust 20483021a5bbSTrond Myklebust if (!ctx) 20490c77668dSChuck Lever goto out; 20503021a5bbSTrond Myklebust 20513021a5bbSTrond Myklebust if (gss_seq_is_newer(req->rq_seqno, READ_ONCE(ctx->gc_seq))) 20520c77668dSChuck Lever goto out_ctx; 20533021a5bbSTrond Myklebust 20543021a5bbSTrond Myklebust seq_xmit = READ_ONCE(ctx->gc_seq_xmit); 20553021a5bbSTrond Myklebust while (gss_seq_is_newer(req->rq_seqno, seq_xmit)) { 20563021a5bbSTrond Myklebust u32 tmp = seq_xmit; 20573021a5bbSTrond Myklebust 20583021a5bbSTrond Myklebust seq_xmit = cmpxchg(&ctx->gc_seq_xmit, tmp, req->rq_seqno); 20593021a5bbSTrond Myklebust if (seq_xmit == tmp) { 20603021a5bbSTrond Myklebust ret = false; 20610c77668dSChuck Lever goto out_ctx; 20623021a5bbSTrond Myklebust } 20633021a5bbSTrond Myklebust } 20643021a5bbSTrond Myklebust 20653021a5bbSTrond Myklebust win = ctx->gc_win; 20663021a5bbSTrond Myklebust if (win > 0) 20673021a5bbSTrond Myklebust ret = !gss_seq_is_newer(req->rq_seqno, seq_xmit - win); 20680c77668dSChuck Lever 20690c77668dSChuck Lever out_ctx: 20703021a5bbSTrond Myklebust gss_put_ctx(ctx); 20710c77668dSChuck Lever out: 20720c77668dSChuck Lever trace_rpcgss_need_reencode(task, seq_xmit, ret); 20733021a5bbSTrond Myklebust return ret; 20743021a5bbSTrond Myklebust } 20753021a5bbSTrond Myklebust 20761da177e4SLinus Torvalds static int 2077a0584ee9SChuck Lever gss_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr) 20781da177e4SLinus Torvalds { 2079a0584ee9SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 2080a0584ee9SChuck Lever struct rpc_cred *cred = rqstp->rq_cred; 20811da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 20821da177e4SLinus Torvalds gc_base); 20831da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20841da177e4SLinus Torvalds int status = -EIO; 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 20871da177e4SLinus Torvalds goto out_decode; 20881da177e4SLinus Torvalds switch (gss_cred->gc_service) { 20891da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 2090a0584ee9SChuck Lever status = gss_unwrap_resp_auth(cred); 20911da177e4SLinus Torvalds break; 20921da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 20930c77668dSChuck Lever status = gss_unwrap_resp_integ(task, cred, ctx, rqstp, xdr); 20941da177e4SLinus Torvalds break; 20951da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 20960c77668dSChuck Lever status = gss_unwrap_resp_priv(task, cred, ctx, rqstp, xdr); 20971da177e4SLinus Torvalds break; 20981da177e4SLinus Torvalds } 2099a0584ee9SChuck Lever if (status) 2100a0584ee9SChuck Lever goto out; 2101a0584ee9SChuck Lever 21021da177e4SLinus Torvalds out_decode: 2103a0584ee9SChuck Lever status = rpcauth_unwrap_resp_decode(task, xdr); 21041da177e4SLinus Torvalds out: 21051da177e4SLinus Torvalds gss_put_ctx(ctx); 21061da177e4SLinus Torvalds return status; 21071da177e4SLinus Torvalds } 21081da177e4SLinus Torvalds 2109f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 21101da177e4SLinus Torvalds .owner = THIS_MODULE, 21111da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 21121da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 21131da177e4SLinus Torvalds .create = gss_create, 21141da177e4SLinus Torvalds .destroy = gss_destroy, 2115a960f8d6SFrank Sorenson .hash_cred = gss_hash_cred, 21161da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 211780df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 21186a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 21199568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 2120a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 21211da177e4SLinus Torvalds }; 21221da177e4SLinus Torvalds 2123f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 21241da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 21251da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 2126fba3bad4STrond Myklebust .cr_init = gss_cred_init, 21271da177e4SLinus Torvalds .crmatch = gss_match, 21281da177e4SLinus Torvalds .crmarshal = gss_marshal, 21291da177e4SLinus Torvalds .crrefresh = gss_refresh, 21301da177e4SLinus Torvalds .crvalidate = gss_validate, 21311da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 21321da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 21334de6caa2SAndy Adamson .crkey_timeout = gss_key_timeout, 2134a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21353021a5bbSTrond Myklebust .crneed_reencode = gss_xmit_need_reencode, 21361da177e4SLinus Torvalds }; 21371da177e4SLinus Torvalds 21380df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 21390df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 21406dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 21410df7fb74STrond Myklebust .crmatch = gss_match, 21420df7fb74STrond Myklebust .crmarshal = gss_marshal, 21430df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 21440df7fb74STrond Myklebust .crvalidate = gss_validate, 21450df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 21460df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 2147a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21480df7fb74STrond Myklebust }; 21490df7fb74STrond Myklebust 2150b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 2151ac83228aSTrond Myklebust .upcall = gss_v0_upcall, 21521da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 21531da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 215434769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 215534769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 215634769fc4S\"J. Bruce Fields\ }; 215734769fc4S\"J. Bruce Fields\ 2158b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 2159ac83228aSTrond Myklebust .upcall = gss_v1_upcall, 216034769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 216134769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 216234769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 21631da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 21641da177e4SLinus Torvalds }; 21651da177e4SLinus Torvalds 2166a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 2167a1db410dSStanislav Kinsbursky { 2168a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 2169a1db410dSStanislav Kinsbursky } 2170a1db410dSStanislav Kinsbursky 2171a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 2172a1db410dSStanislav Kinsbursky { 2173a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 2174a1db410dSStanislav Kinsbursky } 2175a1db410dSStanislav Kinsbursky 2176a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 2177a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 2178a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 2179a1db410dSStanislav Kinsbursky }; 2180a1db410dSStanislav Kinsbursky 21811da177e4SLinus Torvalds /* 21821da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 21831da177e4SLinus Torvalds */ 21841da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 21851da177e4SLinus Torvalds { 21861da177e4SLinus Torvalds int err = 0; 21871da177e4SLinus Torvalds 21881da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 21891da177e4SLinus Torvalds if (err) 21901da177e4SLinus Torvalds goto out; 21911da177e4SLinus Torvalds err = gss_svc_init(); 21921da177e4SLinus Torvalds if (err) 21931da177e4SLinus Torvalds goto out_unregister; 2194a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 2195a1db410dSStanislav Kinsbursky if (err) 2196a1db410dSStanislav Kinsbursky goto out_svc_exit; 219779a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 21981da177e4SLinus Torvalds return 0; 2199a1db410dSStanislav Kinsbursky out_svc_exit: 2200a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 22011da177e4SLinus Torvalds out_unregister: 22021da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 22031da177e4SLinus Torvalds out: 22041da177e4SLinus Torvalds return err; 22051da177e4SLinus Torvalds } 22061da177e4SLinus Torvalds 22071da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 22081da177e4SLinus Torvalds { 2209a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 22101da177e4SLinus Torvalds gss_svc_shutdown(); 22111da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 2212bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 22131da177e4SLinus Torvalds } 22141da177e4SLinus Torvalds 221571afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 22161da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2217126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 2218126e216aSTrond Myklebust gss_expired_cred_retry_delay, 2219126e216aSTrond Myklebust uint, 0644); 2220126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 2221126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 2222126e216aSTrond Myklebust 22234de6caa2SAndy Adamson module_param_named(key_expire_timeo, 22244de6caa2SAndy Adamson gss_key_expire_timeo, 22254de6caa2SAndy Adamson uint, 0644); 22264de6caa2SAndy Adamson MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " 22274de6caa2SAndy Adamson "credential keys lifetime where the NFS layer cleans up " 22284de6caa2SAndy Adamson "prior to key expiration"); 22294de6caa2SAndy Adamson 22301da177e4SLinus Torvalds module_init(init_rpcsec_gss) 22311da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 2232