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); 556fe31ce83SDan Carpenter if (!gss_msg->service_name) { 557fe31ce83SDan Carpenter err = -ENOMEM; 558e9776d0fSTrond Myklebust goto err_put_pipe_version; 55907d53ae4Szhong jiang } 560fe31ce83SDan Carpenter } 5611da177e4SLinus Torvalds return gss_msg; 562e9776d0fSTrond Myklebust err_put_pipe_version: 563e9776d0fSTrond Myklebust put_pipe_version(gss_auth->net); 5649d3a2260STrond Myklebust err_free_msg: 5659d3a2260STrond Myklebust kfree(gss_msg); 5669d3a2260STrond Myklebust err: 5679d3a2260STrond Myklebust return ERR_PTR(err); 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds static struct gss_upcall_msg * 571e726340aSTrond Myklebust gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) 5721da177e4SLinus Torvalds { 5737c67db3aSTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 5747c67db3aSTrond Myklebust struct gss_cred, gc_base); 5751da177e4SLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 57604d1532bSNeilBrown kuid_t uid = cred->cr_cred->fsuid; 5771da177e4SLinus Torvalds 578e726340aSTrond Myklebust gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); 579db75b3d6S\"J. Bruce Fields\ if (IS_ERR(gss_new)) 580db75b3d6S\"J. Bruce Fields\ return gss_new; 581053e324fSSuresh Jayaraman gss_msg = gss_add_msg(gss_new); 5821da177e4SLinus Torvalds if (gss_msg == gss_new) { 5831cded9d2SNeilBrown int res; 5847ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 5851cded9d2SNeilBrown res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 5861da177e4SLinus Torvalds if (res) { 5871da177e4SLinus Torvalds gss_unhash_msg(gss_new); 5887ff13969SReshetova, Elena refcount_dec(&gss_msg->count); 5891cded9d2SNeilBrown gss_release_msg(gss_new); 5901da177e4SLinus Torvalds gss_msg = ERR_PTR(res); 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds } else 5931da177e4SLinus Torvalds gss_release_msg(gss_new); 5941da177e4SLinus Torvalds return gss_msg; 5951da177e4SLinus Torvalds } 5961da177e4SLinus Torvalds 597b03568c3S\"J. Bruce Fields\ static void warn_gssd(void) 598b03568c3S\"J. Bruce Fields\ { 5990ea9de0eSJeff Layton dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); 600b03568c3S\"J. Bruce Fields\ } 601b03568c3S\"J. Bruce Fields\ 6021da177e4SLinus Torvalds static inline int 6031da177e4SLinus Torvalds gss_refresh_upcall(struct rpc_task *task) 6041da177e4SLinus Torvalds { 605a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 6064a8c1344STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 6071da177e4SLinus Torvalds struct gss_auth, rpc_auth); 6081da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 6091da177e4SLinus Torvalds struct gss_cred, gc_base); 6101da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6119beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6121da177e4SLinus Torvalds int err = 0; 6131da177e4SLinus Torvalds 614e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 615480e3243SRoel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 61679a3f20bS\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 61779a3f20bS\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 61879a3f20bS\"J. Bruce Fields\ warn_gssd(); 6196b2e6856STrond Myklebust rpc_sleep_on_timeout(&pipe_version_rpc_waitqueue, 6206b2e6856STrond Myklebust task, NULL, jiffies + (15 * HZ)); 6210c77668dSChuck Lever err = -EAGAIN; 6220c77668dSChuck Lever goto out; 62379a3f20bS\"J. Bruce Fields\ } 6241da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6251da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6261da177e4SLinus Torvalds goto out; 6271da177e4SLinus Torvalds } 6289beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6299beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6301da177e4SLinus Torvalds if (gss_cred->gc_upcall != NULL) 6315d00837bSTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 632126e216aSTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 6331da177e4SLinus Torvalds gss_cred->gc_upcall = gss_msg; 6341da177e4SLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 6357ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 6365d00837bSTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 637126e216aSTrond Myklebust } else { 638126e216aSTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 6391da177e4SLinus Torvalds err = gss_msg->msg.errno; 640126e216aSTrond Myklebust } 6419beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6421da177e4SLinus Torvalds gss_release_msg(gss_msg); 6431da177e4SLinus Torvalds out: 6440c77668dSChuck Lever trace_rpcgss_upcall_result(from_kuid(&init_user_ns, 6450c77668dSChuck Lever cred->cr_cred->fsuid), err); 6461da177e4SLinus Torvalds return err; 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds static inline int 6501da177e4SLinus Torvalds gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 6511da177e4SLinus Torvalds { 652e726340aSTrond Myklebust struct net *net = gss_auth->net; 653abfdbd53STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 6549beae467SStanislav Kinsbursky struct rpc_pipe *pipe; 6551da177e4SLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 6561da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 6571da177e4SLinus Torvalds DEFINE_WAIT(wait); 658d36ccb9cSTrond Myklebust int err; 6591da177e4SLinus Torvalds 66079a3f20bS\"J. Bruce Fields\ retry: 661d36ccb9cSTrond Myklebust err = 0; 66289f84243SJeff Layton /* if gssd is down, just skip upcalling altogether */ 66389f84243SJeff Layton if (!gssd_running(net)) { 66489f84243SJeff Layton warn_gssd(); 6650c77668dSChuck Lever err = -EACCES; 6660c77668dSChuck Lever goto out; 66789f84243SJeff Layton } 668e726340aSTrond Myklebust gss_msg = gss_setup_upcall(gss_auth, cred); 66979a3f20bS\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 67079a3f20bS\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 67189f84243SJeff Layton sn->pipe_version >= 0, 15 * HZ); 6722aed8b47STrond Myklebust if (sn->pipe_version < 0) { 673d1a8016aSBryan Schumaker warn_gssd(); 674d1a8016aSBryan Schumaker err = -EACCES; 675d1a8016aSBryan Schumaker } 676d36ccb9cSTrond Myklebust if (err < 0) 67779a3f20bS\"J. Bruce Fields\ goto out; 67879a3f20bS\"J. Bruce Fields\ goto retry; 67979a3f20bS\"J. Bruce Fields\ } 6801da177e4SLinus Torvalds if (IS_ERR(gss_msg)) { 6811da177e4SLinus Torvalds err = PTR_ERR(gss_msg); 6821da177e4SLinus Torvalds goto out; 6831da177e4SLinus Torvalds } 6849beae467SStanislav Kinsbursky pipe = gss_msg->pipe; 6851da177e4SLinus Torvalds for (;;) { 6865afa9133STrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 6879beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 6881da177e4SLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 6891da177e4SLinus Torvalds break; 6901da177e4SLinus Torvalds } 6919beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 6925afa9133STrond Myklebust if (fatal_signal_pending(current)) { 6931da177e4SLinus Torvalds err = -ERESTARTSYS; 6941da177e4SLinus Torvalds goto out_intr; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds schedule(); 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds if (gss_msg->ctx) 6997b6962b0STrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 7001da177e4SLinus Torvalds else 7011da177e4SLinus Torvalds err = gss_msg->msg.errno; 7029beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7031da177e4SLinus Torvalds out_intr: 7041da177e4SLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 7051da177e4SLinus Torvalds gss_release_msg(gss_msg); 7061da177e4SLinus Torvalds out: 7070c77668dSChuck Lever trace_rpcgss_upcall_result(from_kuid(&init_user_ns, 7080c77668dSChuck Lever cred->cr_cred->fsuid), err); 7091da177e4SLinus Torvalds return err; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds #define MSG_BUF_MAXSIZE 1024 7131da177e4SLinus Torvalds 7141da177e4SLinus Torvalds static ssize_t 7151da177e4SLinus Torvalds gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds const void *p, *end; 7181da177e4SLinus Torvalds void *buf; 7191da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 720496ad9aaSAl Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 7211da177e4SLinus Torvalds struct gss_cl_ctx *ctx; 72290602c7bSEric W. Biederman uid_t id; 72390602c7bSEric W. Biederman kuid_t uid; 7243b68aaeaSTrond Myklebust ssize_t err = -EFBIG; 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 7271da177e4SLinus Torvalds goto out; 7281da177e4SLinus Torvalds err = -ENOMEM; 7290f38b873STrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 7301da177e4SLinus Torvalds if (!buf) 7311da177e4SLinus Torvalds goto out; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds err = -EFAULT; 7341da177e4SLinus Torvalds if (copy_from_user(buf, src, mlen)) 7351da177e4SLinus Torvalds goto err; 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds end = (const void *)((char *)buf + mlen); 73890602c7bSEric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 7391da177e4SLinus Torvalds if (IS_ERR(p)) { 7401da177e4SLinus Torvalds err = PTR_ERR(p); 7411da177e4SLinus Torvalds goto err; 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds 744283ebe3eSTrond Myklebust uid = make_kuid(current_user_ns(), id); 74590602c7bSEric W. Biederman if (!uid_valid(uid)) { 74690602c7bSEric W. Biederman err = -EINVAL; 74790602c7bSEric W. Biederman goto err; 74890602c7bSEric W. Biederman } 74990602c7bSEric W. Biederman 7501da177e4SLinus Torvalds err = -ENOMEM; 7511da177e4SLinus Torvalds ctx = gss_alloc_context(); 7521da177e4SLinus Torvalds if (ctx == NULL) 7531da177e4SLinus Torvalds goto err; 7543b68aaeaSTrond Myklebust 7553b68aaeaSTrond Myklebust err = -ENOENT; 7563b68aaeaSTrond Myklebust /* Find a matching upcall */ 7579beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7589130b8dbSOlga Kornievskaia gss_msg = __gss_find_upcall(pipe, uid, NULL); 7593b68aaeaSTrond Myklebust if (gss_msg == NULL) { 7609beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7613b68aaeaSTrond Myklebust goto err_put_ctx; 7623b68aaeaSTrond Myklebust } 7633b68aaeaSTrond Myklebust list_del_init(&gss_msg->list); 7649beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7653b68aaeaSTrond Myklebust 7666e84c7b6STrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 7671da177e4SLinus Torvalds if (IS_ERR(p)) { 7681da177e4SLinus Torvalds err = PTR_ERR(p); 769486bad2eSJeff Layton switch (err) { 770486bad2eSJeff Layton case -EACCES: 771dc5ddce9SJeff Layton case -EKEYEXPIRED: 772486bad2eSJeff Layton gss_msg->msg.errno = err; 773486bad2eSJeff Layton err = mlen; 774486bad2eSJeff Layton break; 775486bad2eSJeff Layton case -EFAULT: 776486bad2eSJeff Layton case -ENOMEM: 777486bad2eSJeff Layton case -EINVAL: 778486bad2eSJeff Layton case -ENOSYS: 779486bad2eSJeff Layton gss_msg->msg.errno = -EAGAIN; 780486bad2eSJeff Layton break; 781486bad2eSJeff Layton default: 782486bad2eSJeff Layton printk(KERN_CRIT "%s: bad return from " 7836c853099SRandy Dunlap "gss_fill_context: %zd\n", __func__, err); 784437b300cSScott Mayhew gss_msg->msg.errno = -EIO; 785486bad2eSJeff Layton } 7863b68aaeaSTrond Myklebust goto err_release_msg; 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds gss_msg->ctx = gss_get_ctx(ctx); 7893b68aaeaSTrond Myklebust err = mlen; 7903b68aaeaSTrond Myklebust 7913b68aaeaSTrond Myklebust err_release_msg: 7929beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 7931da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 7949beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 7951da177e4SLinus Torvalds gss_release_msg(gss_msg); 7961da177e4SLinus Torvalds err_put_ctx: 7971da177e4SLinus Torvalds gss_put_ctx(ctx); 7981da177e4SLinus Torvalds err: 7991da177e4SLinus Torvalds kfree(buf); 8001da177e4SLinus Torvalds out: 8011da177e4SLinus Torvalds return err; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 80434769fc4S\"J. Bruce Fields\ static int gss_pipe_open(struct inode *inode, int new_version) 805cf81939dS\"J. Bruce Fields\ { 8062aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8072aed8b47STrond Myklebust struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); 80834769fc4S\"J. Bruce Fields\ int ret = 0; 80934769fc4S\"J. Bruce Fields\ 81079a3f20bS\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 8112aed8b47STrond Myklebust if (sn->pipe_version < 0) { 81234769fc4S\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 8132aed8b47STrond Myklebust sn->pipe_version = new_version; 81479a3f20bS\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 81579a3f20bS\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 8162aed8b47STrond Myklebust } else if (sn->pipe_version != new_version) { 81734769fc4S\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 81834769fc4S\"J. Bruce Fields\ ret = -EBUSY; 81934769fc4S\"J. Bruce Fields\ goto out; 82079a3f20bS\"J. Bruce Fields\ } 8212aed8b47STrond Myklebust atomic_inc(&sn->pipe_users); 82234769fc4S\"J. Bruce Fields\ out: 82379a3f20bS\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 82434769fc4S\"J. Bruce Fields\ return ret; 82534769fc4S\"J. Bruce Fields\ 82634769fc4S\"J. Bruce Fields\ } 82734769fc4S\"J. Bruce Fields\ 82834769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v0(struct inode *inode) 82934769fc4S\"J. Bruce Fields\ { 83034769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 83134769fc4S\"J. Bruce Fields\ } 83234769fc4S\"J. Bruce Fields\ 83334769fc4S\"J. Bruce Fields\ static int gss_pipe_open_v1(struct inode *inode) 83434769fc4S\"J. Bruce Fields\ { 83534769fc4S\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 836cf81939dS\"J. Bruce Fields\ } 837cf81939dS\"J. Bruce Fields\ 8381da177e4SLinus Torvalds static void 8391da177e4SLinus Torvalds gss_pipe_release(struct inode *inode) 8401da177e4SLinus Torvalds { 8412aed8b47STrond Myklebust struct net *net = inode->i_sb->s_fs_info; 8429beae467SStanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 8431da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg; 8441da177e4SLinus Torvalds 8455a67657aSTrond Myklebust restart: 8469beae467SStanislav Kinsbursky spin_lock(&pipe->lock); 8479beae467SStanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 8486e84c7b6STrond Myklebust 8495a67657aSTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 8505a67657aSTrond Myklebust continue; 8511da177e4SLinus Torvalds gss_msg->msg.errno = -EPIPE; 8527ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8531da177e4SLinus Torvalds __gss_unhash_msg(gss_msg); 8549beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 8551da177e4SLinus Torvalds gss_release_msg(gss_msg); 8565a67657aSTrond Myklebust goto restart; 8571da177e4SLinus Torvalds } 8589beae467SStanislav Kinsbursky spin_unlock(&pipe->lock); 859cf81939dS\"J. Bruce Fields\ 8602aed8b47STrond Myklebust put_pipe_version(net); 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds static void 8641da177e4SLinus Torvalds gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 8651da177e4SLinus Torvalds { 8661da177e4SLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds if (msg->errno < 0) { 8697ff13969SReshetova, Elena refcount_inc(&gss_msg->count); 8701da177e4SLinus Torvalds gss_unhash_msg(gss_msg); 871b03568c3S\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 872b03568c3S\"J. Bruce Fields\ warn_gssd(); 8731da177e4SLinus Torvalds gss_release_msg(gss_msg); 8741da177e4SLinus Torvalds } 8751cded9d2SNeilBrown gss_release_msg(gss_msg); 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds 87819172284STrond Myklebust static void gss_pipe_dentry_destroy(struct dentry *dir, 87919172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 880ccdc28f8SStanislav Kinsbursky { 88119172284STrond Myklebust struct gss_pipe *gss_pipe = pdo->pdo_data; 88219172284STrond Myklebust struct rpc_pipe *pipe = gss_pipe->pipe; 883ccdc28f8SStanislav Kinsbursky 88419172284STrond Myklebust if (pipe->dentry != NULL) { 88519172284STrond Myklebust rpc_unlink(pipe->dentry); 88619172284STrond Myklebust pipe->dentry = NULL; 8876b2fddd3STrond Myklebust } 888ccdc28f8SStanislav Kinsbursky } 889ccdc28f8SStanislav Kinsbursky 89019172284STrond Myklebust static int gss_pipe_dentry_create(struct dentry *dir, 89119172284STrond Myklebust struct rpc_pipe_dir_object *pdo) 892ccdc28f8SStanislav Kinsbursky { 89319172284STrond Myklebust struct gss_pipe *p = pdo->pdo_data; 8946b2fddd3STrond Myklebust struct dentry *dentry; 895ccdc28f8SStanislav Kinsbursky 89619172284STrond Myklebust dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); 89719172284STrond Myklebust if (IS_ERR(dentry)) 89819172284STrond Myklebust return PTR_ERR(dentry); 89919172284STrond Myklebust p->pipe->dentry = dentry; 900ccdc28f8SStanislav Kinsbursky return 0; 90119172284STrond Myklebust } 902ccdc28f8SStanislav Kinsbursky 90319172284STrond Myklebust static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { 90419172284STrond Myklebust .create = gss_pipe_dentry_create, 90519172284STrond Myklebust .destroy = gss_pipe_dentry_destroy, 90619172284STrond Myklebust }; 90719172284STrond Myklebust 90819172284STrond Myklebust static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, 90919172284STrond Myklebust const char *name, 91019172284STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 91119172284STrond Myklebust { 91219172284STrond Myklebust struct gss_pipe *p; 91319172284STrond Myklebust int err = -ENOMEM; 91419172284STrond Myklebust 91519172284STrond Myklebust p = kmalloc(sizeof(*p), GFP_KERNEL); 91619172284STrond Myklebust if (p == NULL) 91719172284STrond Myklebust goto err; 91819172284STrond Myklebust p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); 91919172284STrond Myklebust if (IS_ERR(p->pipe)) { 92019172284STrond Myklebust err = PTR_ERR(p->pipe); 92119172284STrond Myklebust goto err_free_gss_pipe; 92219172284STrond Myklebust } 92319172284STrond Myklebust p->name = name; 92419172284STrond Myklebust p->clnt = clnt; 925414a6295STrond Myklebust kref_init(&p->kref); 92619172284STrond Myklebust rpc_init_pipe_dir_object(&p->pdo, 92719172284STrond Myklebust &gss_pipe_dir_object_ops, 92819172284STrond Myklebust p); 92919172284STrond Myklebust return p; 93019172284STrond Myklebust err_free_gss_pipe: 93119172284STrond Myklebust kfree(p); 9326b2fddd3STrond Myklebust err: 93319172284STrond Myklebust return ERR_PTR(err); 934ccdc28f8SStanislav Kinsbursky } 935ccdc28f8SStanislav Kinsbursky 936414a6295STrond Myklebust struct gss_alloc_pdo { 937414a6295STrond Myklebust struct rpc_clnt *clnt; 938414a6295STrond Myklebust const char *name; 939414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops; 940414a6295STrond Myklebust }; 941414a6295STrond Myklebust 942414a6295STrond Myklebust static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) 943414a6295STrond Myklebust { 944414a6295STrond Myklebust struct gss_pipe *gss_pipe; 945414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 946414a6295STrond Myklebust 947414a6295STrond Myklebust if (pdo->pdo_ops != &gss_pipe_dir_object_ops) 948414a6295STrond Myklebust return 0; 949414a6295STrond Myklebust gss_pipe = container_of(pdo, struct gss_pipe, pdo); 950414a6295STrond Myklebust if (strcmp(gss_pipe->name, args->name) != 0) 951414a6295STrond Myklebust return 0; 952414a6295STrond Myklebust if (!kref_get_unless_zero(&gss_pipe->kref)) 953414a6295STrond Myklebust return 0; 954414a6295STrond Myklebust return 1; 955414a6295STrond Myklebust } 956414a6295STrond Myklebust 957414a6295STrond Myklebust static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) 958414a6295STrond Myklebust { 959414a6295STrond Myklebust struct gss_pipe *gss_pipe; 960414a6295STrond Myklebust struct gss_alloc_pdo *args = data; 961414a6295STrond Myklebust 962414a6295STrond Myklebust gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); 963414a6295STrond Myklebust if (!IS_ERR(gss_pipe)) 964414a6295STrond Myklebust return &gss_pipe->pdo; 965414a6295STrond Myklebust return NULL; 966414a6295STrond Myklebust } 967414a6295STrond Myklebust 968414a6295STrond Myklebust static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, 969414a6295STrond Myklebust const char *name, 970414a6295STrond Myklebust const struct rpc_pipe_ops *upcall_ops) 971414a6295STrond Myklebust { 972414a6295STrond Myklebust struct net *net = rpc_net_ns(clnt); 973414a6295STrond Myklebust struct rpc_pipe_dir_object *pdo; 974414a6295STrond Myklebust struct gss_alloc_pdo args = { 975414a6295STrond Myklebust .clnt = clnt, 976414a6295STrond Myklebust .name = name, 977414a6295STrond Myklebust .upcall_ops = upcall_ops, 978414a6295STrond Myklebust }; 979414a6295STrond Myklebust 980414a6295STrond Myklebust pdo = rpc_find_or_alloc_pipe_dir_object(net, 981414a6295STrond Myklebust &clnt->cl_pipedir_objects, 982414a6295STrond Myklebust gss_pipe_match_pdo, 983414a6295STrond Myklebust gss_pipe_alloc_pdo, 984414a6295STrond Myklebust &args); 985414a6295STrond Myklebust if (pdo != NULL) 986414a6295STrond Myklebust return container_of(pdo, struct gss_pipe, pdo); 987414a6295STrond Myklebust return ERR_PTR(-ENOMEM); 988414a6295STrond Myklebust } 989414a6295STrond Myklebust 99019172284STrond Myklebust static void __gss_pipe_free(struct gss_pipe *p) 991ccdc28f8SStanislav Kinsbursky { 99219172284STrond Myklebust struct rpc_clnt *clnt = p->clnt; 99319172284STrond Myklebust struct net *net = rpc_net_ns(clnt); 994ccdc28f8SStanislav Kinsbursky 99519172284STrond Myklebust rpc_remove_pipe_dir_object(net, 99619172284STrond Myklebust &clnt->cl_pipedir_objects, 99719172284STrond Myklebust &p->pdo); 99819172284STrond Myklebust rpc_destroy_pipe_data(p->pipe); 99919172284STrond Myklebust kfree(p); 1000ccdc28f8SStanislav Kinsbursky } 1001ccdc28f8SStanislav Kinsbursky 1002414a6295STrond Myklebust static void __gss_pipe_release(struct kref *kref) 1003414a6295STrond Myklebust { 1004414a6295STrond Myklebust struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); 1005414a6295STrond Myklebust 1006414a6295STrond Myklebust __gss_pipe_free(p); 1007414a6295STrond Myklebust } 1008414a6295STrond Myklebust 100919172284STrond Myklebust static void gss_pipe_free(struct gss_pipe *p) 1010ccdc28f8SStanislav Kinsbursky { 101119172284STrond Myklebust if (p != NULL) 1012414a6295STrond Myklebust kref_put(&p->kref, __gss_pipe_release); 1013ccdc28f8SStanislav Kinsbursky } 1014ccdc28f8SStanislav Kinsbursky 10151da177e4SLinus Torvalds /* 10161da177e4SLinus Torvalds * NOTE: we have the opportunity to use different 10171da177e4SLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 10181da177e4SLinus Torvalds */ 1019eb6dc19dSTrond Myklebust static struct gss_auth * 102082b98ca5SSargun Dhillon gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 10211da177e4SLinus Torvalds { 1022c2190661STrond Myklebust rpc_authflavor_t flavor = args->pseudoflavor; 10231da177e4SLinus Torvalds struct gss_auth *gss_auth; 102419172284STrond Myklebust struct gss_pipe *gss_pipe; 10251da177e4SLinus Torvalds struct rpc_auth * auth; 10266a19275aSJ. Bruce Fields int err = -ENOMEM; /* XXX? */ 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds if (!try_module_get(THIS_MODULE)) 10296a19275aSJ. Bruce Fields return ERR_PTR(err); 10301da177e4SLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 10311da177e4SLinus Torvalds goto out_dec; 1032eb6dc19dSTrond Myklebust INIT_HLIST_NODE(&gss_auth->hash); 1033bd4a3eb1STrond Myklebust gss_auth->target_name = NULL; 1034c2190661STrond Myklebust if (args->target_name) { 1035c2190661STrond Myklebust gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); 1036bd4a3eb1STrond Myklebust if (gss_auth->target_name == NULL) 1037bd4a3eb1STrond Myklebust goto err_free; 1038bd4a3eb1STrond Myklebust } 10391da177e4SLinus Torvalds gss_auth->client = clnt; 1040e726340aSTrond Myklebust gss_auth->net = get_net(rpc_net_ns(clnt)); 10416a19275aSJ. Bruce Fields err = -EINVAL; 10421da177e4SLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 10430c77668dSChuck Lever if (!gss_auth->mech) 1044e726340aSTrond Myklebust goto err_put_net; 10451da177e4SLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 1046438b6fdeSJ. Bruce Fields if (gss_auth->service == 0) 1047438b6fdeSJ. Bruce Fields goto err_put_mech; 1048a699d65eSTrond Myklebust if (!gssd_running(gss_auth->net)) 1049a699d65eSTrond Myklebust goto err_put_mech; 10501da177e4SLinus Torvalds auth = &gss_auth->rpc_auth; 10511da177e4SLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 10521da177e4SLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 1053a00275baSChuck Lever auth->au_verfsize = GSS_VERF_SLACK >> 2; 105435e77d21SChuck Lever auth->au_ralign = GSS_VERF_SLACK >> 2; 1055ce52914eSScott Mayhew auth->au_flags = 0; 10561da177e4SLinus Torvalds auth->au_ops = &authgss_ops; 10571da177e4SLinus Torvalds auth->au_flavor = flavor; 105865b80179SChuck Lever if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor)) 105965b80179SChuck Lever auth->au_flags |= RPCAUTH_AUTH_DATATOUCH; 1060331bc71cSTrond Myklebust refcount_set(&auth->au_count, 1); 10610285ed1fSTrond Myklebust kref_init(&gss_auth->kref); 10621da177e4SLinus Torvalds 106319172284STrond Myklebust err = rpcauth_init_credcache(auth); 106419172284STrond Myklebust if (err) 106519172284STrond Myklebust goto err_put_mech; 106634769fc4S\"J. Bruce Fields\ /* 106734769fc4S\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 106834769fc4S\"J. Bruce Fields\ * examined the directory at the right moment might conclude 106934769fc4S\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 107034769fc4S\"J. Bruce Fields\ * the new pipe first. 107134769fc4S\"J. Bruce Fields\ */ 1072414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); 107319172284STrond Myklebust if (IS_ERR(gss_pipe)) { 107419172284STrond Myklebust err = PTR_ERR(gss_pipe); 107519172284STrond Myklebust goto err_destroy_credcache; 10766a19275aSJ. Bruce Fields } 107719172284STrond Myklebust gss_auth->gss_pipe[1] = gss_pipe; 10781da177e4SLinus Torvalds 1079414a6295STrond Myklebust gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, 108019172284STrond Myklebust &gss_upcall_ops_v0); 108119172284STrond Myklebust if (IS_ERR(gss_pipe)) { 108219172284STrond Myklebust err = PTR_ERR(gss_pipe); 1083c239d83bSStanislav Kinsbursky goto err_destroy_pipe_1; 1084c239d83bSStanislav Kinsbursky } 108519172284STrond Myklebust gss_auth->gss_pipe[0] = gss_pipe; 108607a2bf1dSTrond Myklebust 1087eb6dc19dSTrond Myklebust return gss_auth; 1088c239d83bSStanislav Kinsbursky err_destroy_pipe_1: 1089414a6295STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 109019172284STrond Myklebust err_destroy_credcache: 109119172284STrond Myklebust rpcauth_destroy_credcache(auth); 10921da177e4SLinus Torvalds err_put_mech: 10931da177e4SLinus Torvalds gss_mech_put(gss_auth->mech); 1094e726340aSTrond Myklebust err_put_net: 1095e726340aSTrond Myklebust put_net(gss_auth->net); 10961da177e4SLinus Torvalds err_free: 1097bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 10981da177e4SLinus Torvalds kfree(gss_auth); 10991da177e4SLinus Torvalds out_dec: 11001da177e4SLinus Torvalds module_put(THIS_MODULE); 11010c77668dSChuck Lever trace_rpcgss_createauth(flavor, err); 11026a19275aSJ. Bruce Fields return ERR_PTR(err); 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static void 11060285ed1fSTrond Myklebust gss_free(struct gss_auth *gss_auth) 11070285ed1fSTrond Myklebust { 110819172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 110919172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 11100285ed1fSTrond Myklebust gss_mech_put(gss_auth->mech); 1111e726340aSTrond Myklebust put_net(gss_auth->net); 1112bd4a3eb1STrond Myklebust kfree(gss_auth->target_name); 11130285ed1fSTrond Myklebust 11140285ed1fSTrond Myklebust kfree(gss_auth); 11150285ed1fSTrond Myklebust module_put(THIS_MODULE); 11160285ed1fSTrond Myklebust } 11170285ed1fSTrond Myklebust 11180285ed1fSTrond Myklebust static void 11190285ed1fSTrond Myklebust gss_free_callback(struct kref *kref) 11200285ed1fSTrond Myklebust { 11210285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 11220285ed1fSTrond Myklebust 11230285ed1fSTrond Myklebust gss_free(gss_auth); 11240285ed1fSTrond Myklebust } 11250285ed1fSTrond Myklebust 11260285ed1fSTrond Myklebust static void 11279eb2ddb4STrond Myklebust gss_put_auth(struct gss_auth *gss_auth) 11289eb2ddb4STrond Myklebust { 11299eb2ddb4STrond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 11309eb2ddb4STrond Myklebust } 11319eb2ddb4STrond Myklebust 11329eb2ddb4STrond Myklebust static void 11331da177e4SLinus Torvalds gss_destroy(struct rpc_auth *auth) 11341da177e4SLinus Torvalds { 113519172284STrond Myklebust struct gss_auth *gss_auth = container_of(auth, 113619172284STrond Myklebust struct gss_auth, rpc_auth); 11371da177e4SLinus Torvalds 1138eb6dc19dSTrond Myklebust if (hash_hashed(&gss_auth->hash)) { 1139eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1140eb6dc19dSTrond Myklebust hash_del(&gss_auth->hash); 1141eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1142eb6dc19dSTrond Myklebust } 1143eb6dc19dSTrond Myklebust 114419172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[0]); 114519172284STrond Myklebust gss_auth->gss_pipe[0] = NULL; 114619172284STrond Myklebust gss_pipe_free(gss_auth->gss_pipe[1]); 114719172284STrond Myklebust gss_auth->gss_pipe[1] = NULL; 11483ab9bb72STrond Myklebust rpcauth_destroy_credcache(auth); 11493ab9bb72STrond Myklebust 11509eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 1153a0f6ed8eSJ. Bruce Fields /* 1154a0f6ed8eSJ. Bruce Fields * Auths may be shared between rpc clients that were cloned from a 1155a0f6ed8eSJ. Bruce Fields * common client with the same xprt, if they also share the flavor and 1156a0f6ed8eSJ. Bruce Fields * target_name. 1157a0f6ed8eSJ. Bruce Fields * 1158a0f6ed8eSJ. Bruce Fields * The auth is looked up from the oldest parent sharing the same 1159a0f6ed8eSJ. Bruce Fields * cl_xprt, and the auth itself references only that common parent 1160a0f6ed8eSJ. Bruce Fields * (which is guaranteed to last as long as any of its descendants). 1161a0f6ed8eSJ. Bruce Fields */ 1162eb6dc19dSTrond Myklebust static struct gss_auth * 116382b98ca5SSargun Dhillon gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args, 1164eb6dc19dSTrond Myklebust struct rpc_clnt *clnt, 1165eb6dc19dSTrond Myklebust struct gss_auth *new) 1166eb6dc19dSTrond Myklebust { 1167eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1168eb6dc19dSTrond Myklebust unsigned long hashval = (unsigned long)clnt; 1169eb6dc19dSTrond Myklebust 1170eb6dc19dSTrond Myklebust spin_lock(&gss_auth_hash_lock); 1171eb6dc19dSTrond Myklebust hash_for_each_possible(gss_auth_hash_table, 1172eb6dc19dSTrond Myklebust gss_auth, 1173eb6dc19dSTrond Myklebust hash, 1174eb6dc19dSTrond Myklebust hashval) { 1175a0f6ed8eSJ. Bruce Fields if (gss_auth->client != clnt) 1176a0f6ed8eSJ. Bruce Fields continue; 1177eb6dc19dSTrond Myklebust if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) 1178eb6dc19dSTrond Myklebust continue; 1179eb6dc19dSTrond Myklebust if (gss_auth->target_name != args->target_name) { 1180eb6dc19dSTrond Myklebust if (gss_auth->target_name == NULL) 1181eb6dc19dSTrond Myklebust continue; 1182eb6dc19dSTrond Myklebust if (args->target_name == NULL) 1183eb6dc19dSTrond Myklebust continue; 1184eb6dc19dSTrond Myklebust if (strcmp(gss_auth->target_name, args->target_name)) 1185eb6dc19dSTrond Myklebust continue; 1186eb6dc19dSTrond Myklebust } 1187331bc71cSTrond Myklebust if (!refcount_inc_not_zero(&gss_auth->rpc_auth.au_count)) 1188eb6dc19dSTrond Myklebust continue; 1189eb6dc19dSTrond Myklebust goto out; 1190eb6dc19dSTrond Myklebust } 1191eb6dc19dSTrond Myklebust if (new) 1192eb6dc19dSTrond Myklebust hash_add(gss_auth_hash_table, &new->hash, hashval); 1193eb6dc19dSTrond Myklebust gss_auth = new; 1194eb6dc19dSTrond Myklebust out: 1195eb6dc19dSTrond Myklebust spin_unlock(&gss_auth_hash_lock); 1196eb6dc19dSTrond Myklebust return gss_auth; 1197eb6dc19dSTrond Myklebust } 1198eb6dc19dSTrond Myklebust 1199eb6dc19dSTrond Myklebust static struct gss_auth * 120082b98ca5SSargun Dhillon gss_create_hashed(const struct rpc_auth_create_args *args, 120182b98ca5SSargun Dhillon struct rpc_clnt *clnt) 1202eb6dc19dSTrond Myklebust { 1203eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1204eb6dc19dSTrond Myklebust struct gss_auth *new; 1205eb6dc19dSTrond Myklebust 1206eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); 1207eb6dc19dSTrond Myklebust if (gss_auth != NULL) 1208eb6dc19dSTrond Myklebust goto out; 1209eb6dc19dSTrond Myklebust new = gss_create_new(args, clnt); 1210eb6dc19dSTrond Myklebust if (IS_ERR(new)) 1211eb6dc19dSTrond Myklebust return new; 1212eb6dc19dSTrond Myklebust gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); 1213eb6dc19dSTrond Myklebust if (gss_auth != new) 1214eb6dc19dSTrond Myklebust gss_destroy(&new->rpc_auth); 1215eb6dc19dSTrond Myklebust out: 1216eb6dc19dSTrond Myklebust return gss_auth; 1217eb6dc19dSTrond Myklebust } 1218eb6dc19dSTrond Myklebust 1219eb6dc19dSTrond Myklebust static struct rpc_auth * 122082b98ca5SSargun Dhillon gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) 1221eb6dc19dSTrond Myklebust { 1222eb6dc19dSTrond Myklebust struct gss_auth *gss_auth; 1223ad01b2c6STrond Myklebust struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); 1224eb6dc19dSTrond Myklebust 1225eb6dc19dSTrond Myklebust while (clnt != clnt->cl_parent) { 1226eb6dc19dSTrond Myklebust struct rpc_clnt *parent = clnt->cl_parent; 1227eb6dc19dSTrond Myklebust /* Find the original parent for this transport */ 1228ad01b2c6STrond Myklebust if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) 1229eb6dc19dSTrond Myklebust break; 1230eb6dc19dSTrond Myklebust clnt = parent; 1231eb6dc19dSTrond Myklebust } 1232eb6dc19dSTrond Myklebust 1233eb6dc19dSTrond Myklebust gss_auth = gss_create_hashed(args, clnt); 1234eb6dc19dSTrond Myklebust if (IS_ERR(gss_auth)) 1235eb6dc19dSTrond Myklebust return ERR_CAST(gss_auth); 1236eb6dc19dSTrond Myklebust return &gss_auth->rpc_auth; 1237eb6dc19dSTrond Myklebust } 1238eb6dc19dSTrond Myklebust 1239a652a4bcSTrond Myklebust static struct gss_cred * 1240a652a4bcSTrond Myklebust gss_dup_cred(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 1241a652a4bcSTrond Myklebust { 1242a652a4bcSTrond Myklebust struct gss_cred *new; 1243a652a4bcSTrond Myklebust 1244a652a4bcSTrond Myklebust /* Make a copy of the cred so that we can reference count it */ 124512a3ad61STrond Myklebust new = kzalloc(sizeof(*gss_cred), GFP_NOFS); 1246a652a4bcSTrond Myklebust if (new) { 1247a652a4bcSTrond Myklebust struct auth_cred acred = { 12488276c902SNeilBrown .cred = gss_cred->gc_base.cr_cred, 1249a652a4bcSTrond Myklebust }; 1250a652a4bcSTrond Myklebust struct gss_cl_ctx *ctx = 1251a652a4bcSTrond Myklebust rcu_dereference_protected(gss_cred->gc_ctx, 1); 1252a652a4bcSTrond Myklebust 1253a652a4bcSTrond Myklebust rpcauth_init_cred(&new->gc_base, &acred, 1254a652a4bcSTrond Myklebust &gss_auth->rpc_auth, 1255a652a4bcSTrond Myklebust &gss_nullops); 1256a652a4bcSTrond Myklebust new->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE; 1257a652a4bcSTrond Myklebust new->gc_service = gss_cred->gc_service; 1258a652a4bcSTrond Myklebust new->gc_principal = gss_cred->gc_principal; 1259a652a4bcSTrond Myklebust kref_get(&gss_auth->kref); 1260a652a4bcSTrond Myklebust rcu_assign_pointer(new->gc_ctx, ctx); 1261a652a4bcSTrond Myklebust gss_get_ctx(ctx); 1262a652a4bcSTrond Myklebust } 1263a652a4bcSTrond Myklebust return new; 1264a652a4bcSTrond Myklebust } 1265a652a4bcSTrond Myklebust 12660df7fb74STrond Myklebust /* 1267a652a4bcSTrond Myklebust * gss_send_destroy_context will cause the RPCSEC_GSS to send a NULL RPC call 12680df7fb74STrond Myklebust * to the server with the GSS control procedure field set to 12690df7fb74STrond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 12700df7fb74STrond Myklebust * all RPCSEC_GSS state associated with that context. 12710df7fb74STrond Myklebust */ 1272a652a4bcSTrond Myklebust static void 1273a652a4bcSTrond Myklebust gss_send_destroy_context(struct rpc_cred *cred) 12740df7fb74STrond Myklebust { 12750df7fb74STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 12760df7fb74STrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1277c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 1278a652a4bcSTrond Myklebust struct gss_cred *new; 12790df7fb74STrond Myklebust struct rpc_task *task; 12800df7fb74STrond Myklebust 1281a652a4bcSTrond Myklebust new = gss_dup_cred(gss_auth, gss_cred); 1282a652a4bcSTrond Myklebust if (new) { 1283c5e6aecdSJeff Layton ctx->gc_proc = RPC_GSS_PROC_DESTROY; 12840df7fb74STrond Myklebust 1285a652a4bcSTrond Myklebust task = rpc_call_null(gss_auth->client, &new->gc_base, 1286a652a4bcSTrond Myklebust RPC_TASK_ASYNC|RPC_TASK_SOFT); 12870df7fb74STrond Myklebust if (!IS_ERR(task)) 12880df7fb74STrond Myklebust rpc_put_task(task); 12890df7fb74STrond Myklebust 1290a652a4bcSTrond Myklebust put_rpccred(&new->gc_base); 1291a652a4bcSTrond Myklebust } 12920df7fb74STrond Myklebust } 12930df7fb74STrond Myklebust 12940df7fb74STrond Myklebust /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 12951da177e4SLinus Torvalds * to create a new cred or context, so they check that things have been 12961da177e4SLinus Torvalds * allocated before freeing them. */ 12971da177e4SLinus Torvalds static void 12985d28dc82STrond Myklebust gss_do_free_ctx(struct gss_cl_ctx *ctx) 12991da177e4SLinus Torvalds { 13000d8a3746STrond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 13011da177e4SLinus Torvalds kfree(ctx->gc_wire_ctx.data); 13022004c726SJeff Layton kfree(ctx->gc_acceptor.data); 13031da177e4SLinus Torvalds kfree(ctx); 13041da177e4SLinus Torvalds } 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds static void 13075d28dc82STrond Myklebust gss_free_ctx_callback(struct rcu_head *head) 13085d28dc82STrond Myklebust { 13095d28dc82STrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 13105d28dc82STrond Myklebust gss_do_free_ctx(ctx); 13115d28dc82STrond Myklebust } 13125d28dc82STrond Myklebust 13135d28dc82STrond Myklebust static void 13145d28dc82STrond Myklebust gss_free_ctx(struct gss_cl_ctx *ctx) 13155d28dc82STrond Myklebust { 13165d28dc82STrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 13175d28dc82STrond Myklebust } 13185d28dc82STrond Myklebust 13195d28dc82STrond Myklebust static void 132031be5bf1STrond Myklebust gss_free_cred(struct gss_cred *gss_cred) 13211da177e4SLinus Torvalds { 132231be5bf1STrond Myklebust kfree(gss_cred); 132331be5bf1STrond Myklebust } 13241da177e4SLinus Torvalds 132531be5bf1STrond Myklebust static void 132631be5bf1STrond Myklebust gss_free_cred_callback(struct rcu_head *head) 132731be5bf1STrond Myklebust { 132831be5bf1STrond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 132931be5bf1STrond Myklebust gss_free_cred(gss_cred); 133031be5bf1STrond Myklebust } 13311da177e4SLinus Torvalds 133231be5bf1STrond Myklebust static void 13336dcd3926SJeff Layton gss_destroy_nullcred(struct rpc_cred *cred) 133431be5bf1STrond Myklebust { 13355d28dc82STrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 13360285ed1fSTrond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 1337c5e6aecdSJeff Layton struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); 13385d28dc82STrond Myklebust 1339a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 134097f68c6bSNeilBrown put_cred(cred->cr_cred); 134131be5bf1STrond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 13425d28dc82STrond Myklebust if (ctx) 13435d28dc82STrond Myklebust gss_put_ctx(ctx); 13449eb2ddb4STrond Myklebust gss_put_auth(gss_auth); 13451da177e4SLinus Torvalds } 13461da177e4SLinus Torvalds 13476dcd3926SJeff Layton static void 13486dcd3926SJeff Layton gss_destroy_cred(struct rpc_cred *cred) 13496dcd3926SJeff Layton { 13506dcd3926SJeff Layton 1351a652a4bcSTrond Myklebust if (test_and_clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) 1352a652a4bcSTrond Myklebust gss_send_destroy_context(cred); 13536dcd3926SJeff Layton gss_destroy_nullcred(cred); 13546dcd3926SJeff Layton } 13556dcd3926SJeff Layton 1356a960f8d6SFrank Sorenson static int 1357a960f8d6SFrank Sorenson gss_hash_cred(struct auth_cred *acred, unsigned int hashbits) 1358a960f8d6SFrank Sorenson { 13598276c902SNeilBrown return hash_64(from_kuid(&init_user_ns, acred->cred->fsuid), hashbits); 1360a960f8d6SFrank Sorenson } 1361a960f8d6SFrank Sorenson 13621da177e4SLinus Torvalds /* 13631da177e4SLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 13641da177e4SLinus Torvalds */ 13651da177e4SLinus Torvalds static struct rpc_cred * 13668a317760STrond Myklebust gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 13671da177e4SLinus Torvalds { 13683c6e0bc8SJeff Layton return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); 13691da177e4SLinus Torvalds } 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds static struct rpc_cred * 13723c6e0bc8SJeff Layton gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) 13731da177e4SLinus Torvalds { 13741da177e4SLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 13751da177e4SLinus Torvalds struct gss_cred *cred = NULL; 13761da177e4SLinus Torvalds int err = -ENOMEM; 13771da177e4SLinus Torvalds 13783c6e0bc8SJeff Layton if (!(cred = kzalloc(sizeof(*cred), gfp))) 13791da177e4SLinus Torvalds goto out_err; 13801da177e4SLinus Torvalds 13815fe4755eSTrond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 13821da177e4SLinus Torvalds /* 13831da177e4SLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 13841da177e4SLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 13851da177e4SLinus Torvalds */ 1386fc432dd9STrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 13871da177e4SLinus Torvalds cred->gc_service = gss_auth->service; 138868c97153STrond Myklebust cred->gc_principal = acred->principal; 13890285ed1fSTrond Myklebust kref_get(&gss_auth->kref); 13901da177e4SLinus Torvalds return &cred->gc_base; 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds out_err: 13931da177e4SLinus Torvalds return ERR_PTR(err); 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds static int 1397fba3bad4STrond Myklebust gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1398fba3bad4STrond Myklebust { 1399fba3bad4STrond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1400fba3bad4STrond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1401fba3bad4STrond Myklebust int err; 1402fba3bad4STrond Myklebust 1403fba3bad4STrond Myklebust do { 1404fba3bad4STrond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1405fba3bad4STrond Myklebust } while (err == -EAGAIN); 1406fba3bad4STrond Myklebust return err; 1407fba3bad4STrond Myklebust } 1408fba3bad4STrond Myklebust 1409a0337d1dSJeff Layton static char * 1410a0337d1dSJeff Layton gss_stringify_acceptor(struct rpc_cred *cred) 1411a0337d1dSJeff Layton { 1412c5e6aecdSJeff Layton char *string = NULL; 1413a0337d1dSJeff Layton struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1414c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1415b3ecba09SJeff Layton unsigned int len; 1416c5e6aecdSJeff Layton struct xdr_netobj *acceptor; 1417c5e6aecdSJeff Layton 1418c5e6aecdSJeff Layton rcu_read_lock(); 1419c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1420c5e6aecdSJeff Layton if (!ctx) 1421c5e6aecdSJeff Layton goto out; 1422c5e6aecdSJeff Layton 1423b3ecba09SJeff Layton len = ctx->gc_acceptor.len; 1424b3ecba09SJeff Layton rcu_read_unlock(); 1425a0337d1dSJeff Layton 1426a0337d1dSJeff Layton /* no point if there's no string */ 1427b3ecba09SJeff Layton if (!len) 1428b3ecba09SJeff Layton return NULL; 1429b3ecba09SJeff Layton realloc: 1430b3ecba09SJeff Layton string = kmalloc(len + 1, GFP_KERNEL); 1431a0337d1dSJeff Layton if (!string) 1432b3ecba09SJeff Layton return NULL; 1433b3ecba09SJeff Layton 1434b3ecba09SJeff Layton rcu_read_lock(); 1435b3ecba09SJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1436b3ecba09SJeff Layton 1437b3ecba09SJeff Layton /* did the ctx disappear or was it replaced by one with no acceptor? */ 1438b3ecba09SJeff Layton if (!ctx || !ctx->gc_acceptor.len) { 1439b3ecba09SJeff Layton kfree(string); 1440b3ecba09SJeff Layton string = NULL; 1441c5e6aecdSJeff Layton goto out; 1442b3ecba09SJeff Layton } 1443b3ecba09SJeff Layton 1444b3ecba09SJeff Layton acceptor = &ctx->gc_acceptor; 1445b3ecba09SJeff Layton 1446b3ecba09SJeff Layton /* 1447b3ecba09SJeff Layton * Did we find a new acceptor that's longer than the original? Allocate 1448b3ecba09SJeff Layton * a longer buffer and try again. 1449b3ecba09SJeff Layton */ 1450b3ecba09SJeff Layton if (len < acceptor->len) { 1451b3ecba09SJeff Layton len = acceptor->len; 1452b3ecba09SJeff Layton rcu_read_unlock(); 1453b3ecba09SJeff Layton kfree(string); 1454b3ecba09SJeff Layton goto realloc; 1455b3ecba09SJeff Layton } 1456a0337d1dSJeff Layton 1457a0337d1dSJeff Layton memcpy(string, acceptor->data, acceptor->len); 1458a0337d1dSJeff Layton string[acceptor->len] = '\0'; 1459c5e6aecdSJeff Layton out: 1460c5e6aecdSJeff Layton rcu_read_unlock(); 1461a0337d1dSJeff Layton return string; 1462a0337d1dSJeff Layton } 1463a0337d1dSJeff Layton 14644de6caa2SAndy Adamson /* 14654de6caa2SAndy Adamson * Returns -EACCES if GSS context is NULL or will expire within the 14664de6caa2SAndy Adamson * timeout (miliseconds) 14674de6caa2SAndy Adamson */ 14684de6caa2SAndy Adamson static int 14694de6caa2SAndy Adamson gss_key_timeout(struct rpc_cred *rc) 14704de6caa2SAndy Adamson { 14714de6caa2SAndy Adamson struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1472c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 1473cc6a7aabSArnd Bergmann unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); 1474cc6a7aabSArnd Bergmann int ret = 0; 14754de6caa2SAndy Adamson 1476c5e6aecdSJeff Layton rcu_read_lock(); 1477c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1478cc6a7aabSArnd Bergmann if (!ctx || time_after(timeout, ctx->gc_expiry)) 1479cc6a7aabSArnd Bergmann ret = -EACCES; 1480c5e6aecdSJeff Layton rcu_read_unlock(); 1481cc6a7aabSArnd Bergmann 1482cc6a7aabSArnd Bergmann return ret; 14834de6caa2SAndy Adamson } 14844de6caa2SAndy Adamson 1485fba3bad4STrond Myklebust static int 14868a317760STrond Myklebust gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 14871da177e4SLinus Torvalds { 14881da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 1489c5e6aecdSJeff Layton struct gss_cl_ctx *ctx; 14904de6caa2SAndy Adamson int ret; 14911da177e4SLinus Torvalds 1492cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 14938a317760STrond Myklebust goto out; 14941da177e4SLinus Torvalds /* Don't match with creds that have expired. */ 1495c5e6aecdSJeff Layton rcu_read_lock(); 1496c5e6aecdSJeff Layton ctx = rcu_dereference(gss_cred->gc_ctx); 1497c5e6aecdSJeff Layton if (!ctx || time_after(jiffies, ctx->gc_expiry)) { 1498c5e6aecdSJeff Layton rcu_read_unlock(); 1499cd019f75STrond Myklebust return 0; 1500c5e6aecdSJeff Layton } 1501c5e6aecdSJeff Layton rcu_read_unlock(); 1502cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 15031da177e4SLinus Torvalds return 0; 15048a317760STrond Myklebust out: 150568c97153STrond Myklebust if (acred->principal != NULL) { 150668c97153STrond Myklebust if (gss_cred->gc_principal == NULL) 150768c97153STrond Myklebust return 0; 15084de6caa2SAndy Adamson ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; 1509ddf529eeSNeilBrown } else { 151068c97153STrond Myklebust if (gss_cred->gc_principal != NULL) 15117c67db3aSTrond Myklebust return 0; 151204d1532bSNeilBrown ret = uid_eq(rc->cr_cred->fsuid, acred->cred->fsuid); 15134de6caa2SAndy Adamson } 15144de6caa2SAndy Adamson return ret; 15151da177e4SLinus Torvalds } 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds /* 15181da177e4SLinus Torvalds * Marshal credentials. 1519e8680a24SChuck Lever * 1520e8680a24SChuck Lever * The expensive part is computing the verifier. We can't cache a 1521e8680a24SChuck Lever * pre-computed version of the verifier because the seqno, which 1522e8680a24SChuck Lever * is different every time, is included in the MIC. 15231da177e4SLinus Torvalds */ 1524e8680a24SChuck Lever static int gss_marshal(struct rpc_task *task, struct xdr_stream *xdr) 15251da177e4SLinus Torvalds { 1526a17c2153STrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1527a17c2153STrond Myklebust struct rpc_cred *cred = req->rq_cred; 15281da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15291da177e4SLinus Torvalds gc_base); 15301da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1531e8680a24SChuck Lever __be32 *p, *cred_len; 15321da177e4SLinus Torvalds u32 maj_stat = 0; 15331da177e4SLinus Torvalds struct xdr_netobj mic; 15341da177e4SLinus Torvalds struct kvec iov; 15351da177e4SLinus Torvalds struct xdr_buf verf_buf; 15360c77668dSChuck Lever int status; 15371da177e4SLinus Torvalds 1538e8680a24SChuck Lever /* Credential */ 1539e8680a24SChuck Lever 1540e8680a24SChuck Lever p = xdr_reserve_space(xdr, 7 * sizeof(*p) + 1541e8680a24SChuck Lever ctx->gc_wire_ctx.len); 1542e8680a24SChuck Lever if (!p) 15430c77668dSChuck Lever goto marshal_failed; 1544e8680a24SChuck Lever *p++ = rpc_auth_gss; 15451da177e4SLinus Torvalds cred_len = p++; 15461da177e4SLinus Torvalds 15471da177e4SLinus Torvalds spin_lock(&ctx->gc_seq_lock); 154897b78ae9STrond Myklebust req->rq_seqno = (ctx->gc_seq < MAXSEQ) ? ctx->gc_seq++ : MAXSEQ; 15491da177e4SLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 155097b78ae9STrond Myklebust if (req->rq_seqno == MAXSEQ) 15510c77668dSChuck Lever goto expired; 15520c77668dSChuck Lever trace_rpcgss_seqno(task); 15531da177e4SLinus Torvalds 1554e8680a24SChuck Lever *p++ = cpu_to_be32(RPC_GSS_VERSION); 1555e8680a24SChuck Lever *p++ = cpu_to_be32(ctx->gc_proc); 1556e8680a24SChuck Lever *p++ = cpu_to_be32(req->rq_seqno); 1557e8680a24SChuck Lever *p++ = cpu_to_be32(gss_cred->gc_service); 15581da177e4SLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 1559e8680a24SChuck Lever *cred_len = cpu_to_be32((p - (cred_len + 1)) << 2); 1560e8680a24SChuck Lever 1561e8680a24SChuck Lever /* Verifier */ 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 15641da177e4SLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1565067fb11bSChuck Lever iov.iov_base = req->rq_snd_buf.head[0].iov_base; 15661da177e4SLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 15671da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 15681da177e4SLinus Torvalds 1569e8680a24SChuck Lever p = xdr_reserve_space(xdr, sizeof(*p)); 1570e8680a24SChuck Lever if (!p) 15710c77668dSChuck Lever goto marshal_failed; 1572e8680a24SChuck Lever *p++ = rpc_auth_gss; 15731da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 157400fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 1575e8680a24SChuck Lever if (maj_stat == GSS_S_CONTEXT_EXPIRED) 15760c77668dSChuck Lever goto expired; 1577e8680a24SChuck Lever else if (maj_stat != 0) 15780c77668dSChuck Lever goto bad_mic; 1579e8680a24SChuck Lever if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) 15800c77668dSChuck Lever goto marshal_failed; 15810c77668dSChuck Lever status = 0; 15820c77668dSChuck Lever out: 15831da177e4SLinus Torvalds gss_put_ctx(ctx); 15840c77668dSChuck Lever return status; 15850c77668dSChuck Lever expired: 158697b78ae9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15870c77668dSChuck Lever status = -EKEYEXPIRED; 15880c77668dSChuck Lever goto out; 15890c77668dSChuck Lever marshal_failed: 15900c77668dSChuck Lever status = -EMSGSIZE; 15910c77668dSChuck Lever goto out; 15920c77668dSChuck Lever bad_mic: 15930c77668dSChuck Lever trace_rpcgss_get_mic(task, maj_stat); 15940c77668dSChuck Lever status = -EIO; 15950c77668dSChuck Lever goto out; 15961da177e4SLinus Torvalds } 15971da177e4SLinus Torvalds 1598cd019f75STrond Myklebust static int gss_renew_cred(struct rpc_task *task) 1599cd019f75STrond Myklebust { 1600a17c2153STrond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1601cd019f75STrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1602cd019f75STrond Myklebust struct gss_cred, 1603cd019f75STrond Myklebust gc_base); 1604cd019f75STrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1605cd019f75STrond Myklebust struct auth_cred acred = { 160697f68c6bSNeilBrown .cred = oldcred->cr_cred, 160768c97153STrond Myklebust .principal = gss_cred->gc_principal, 1608cd019f75STrond Myklebust }; 1609cd019f75STrond Myklebust struct rpc_cred *new; 1610cd019f75STrond Myklebust 1611cd019f75STrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1612cd019f75STrond Myklebust if (IS_ERR(new)) 1613cd019f75STrond Myklebust return PTR_ERR(new); 1614a17c2153STrond Myklebust task->tk_rqstp->rq_cred = new; 1615cd019f75STrond Myklebust put_rpccred(oldcred); 1616cd019f75STrond Myklebust return 0; 1617cd019f75STrond Myklebust } 1618cd019f75STrond Myklebust 1619126e216aSTrond Myklebust static int gss_cred_is_negative_entry(struct rpc_cred *cred) 1620126e216aSTrond Myklebust { 1621126e216aSTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1622126e216aSTrond Myklebust unsigned long now = jiffies; 1623126e216aSTrond Myklebust unsigned long begin, expire; 1624126e216aSTrond Myklebust struct gss_cred *gss_cred; 1625126e216aSTrond Myklebust 1626126e216aSTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1627126e216aSTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1628126e216aSTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1629126e216aSTrond Myklebust 1630126e216aSTrond Myklebust if (time_in_range_open(now, begin, expire)) 1631126e216aSTrond Myklebust return 1; 1632126e216aSTrond Myklebust } 1633126e216aSTrond Myklebust return 0; 1634126e216aSTrond Myklebust } 1635126e216aSTrond Myklebust 16361da177e4SLinus Torvalds /* 16371da177e4SLinus Torvalds * Refresh credentials. XXX - finish 16381da177e4SLinus Torvalds */ 16391da177e4SLinus Torvalds static int 16401da177e4SLinus Torvalds gss_refresh(struct rpc_task *task) 16411da177e4SLinus Torvalds { 1642a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1643cd019f75STrond Myklebust int ret = 0; 16441da177e4SLinus Torvalds 1645126e216aSTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1646126e216aSTrond Myklebust return -EKEYEXPIRED; 1647126e216aSTrond Myklebust 1648cd019f75STrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1649cd019f75STrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1650cd019f75STrond Myklebust ret = gss_renew_cred(task); 1651cd019f75STrond Myklebust if (ret < 0) 1652cd019f75STrond Myklebust goto out; 1653a17c2153STrond Myklebust cred = task->tk_rqstp->rq_cred; 1654cd019f75STrond Myklebust } 1655cd019f75STrond Myklebust 1656cd019f75STrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1657cd019f75STrond Myklebust ret = gss_refresh_upcall(task); 1658cd019f75STrond Myklebust out: 1659cd019f75STrond Myklebust return ret; 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds 16620df7fb74STrond Myklebust /* Dummy refresh routine: used only when destroying the context */ 16630df7fb74STrond Myklebust static int 16640df7fb74STrond Myklebust gss_refresh_null(struct rpc_task *task) 16650df7fb74STrond Myklebust { 1666c297c8b9SAndy Adamson return 0; 16670df7fb74STrond Myklebust } 16680df7fb74STrond Myklebust 1669a0584ee9SChuck Lever static int 1670a0584ee9SChuck Lever gss_validate(struct rpc_task *task, struct xdr_stream *xdr) 16711da177e4SLinus Torvalds { 1672a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 16731da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1674a0584ee9SChuck Lever __be32 *p, *seq = NULL; 16751da177e4SLinus Torvalds struct kvec iov; 16761da177e4SLinus Torvalds struct xdr_buf verf_buf; 16771da177e4SLinus Torvalds struct xdr_netobj mic; 1678a0584ee9SChuck Lever u32 len, maj_stat; 1679a0584ee9SChuck Lever int status; 16801da177e4SLinus Torvalds 1681a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1682a0584ee9SChuck Lever if (!p) 1683a0584ee9SChuck Lever goto validate_failed; 1684a0584ee9SChuck Lever if (*p++ != rpc_auth_gss) 1685a0584ee9SChuck Lever goto validate_failed; 1686a0584ee9SChuck Lever len = be32_to_cpup(p); 1687a0584ee9SChuck Lever if (len > RPC_MAX_AUTH_SIZE) 1688a0584ee9SChuck Lever goto validate_failed; 1689a0584ee9SChuck Lever p = xdr_inline_decode(xdr, len); 1690a0584ee9SChuck Lever if (!p) 1691a0584ee9SChuck Lever goto validate_failed; 16921da177e4SLinus Torvalds 16932876a344SJ. Bruce Fields seq = kmalloc(4, GFP_NOFS); 16942876a344SJ. Bruce Fields if (!seq) 1695a0584ee9SChuck Lever goto validate_failed; 1696a0584ee9SChuck Lever *seq = cpu_to_be32(task->tk_rqstp->rq_seqno); 16972876a344SJ. Bruce Fields iov.iov_base = seq; 16982876a344SJ. Bruce Fields iov.iov_len = 4; 16991da177e4SLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 17001da177e4SLinus Torvalds mic.data = (u8 *)p; 17011da177e4SLinus Torvalds mic.len = len; 170200fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 17031da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1704fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 1705a0584ee9SChuck Lever if (maj_stat) 1706a0584ee9SChuck Lever goto bad_mic; 1707a0584ee9SChuck Lever 170824b2605bSJ. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 170924b2605bSJ. Bruce Fields * calculate the length of the verifier: */ 17101be27f36STrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 1711a0584ee9SChuck Lever status = 0; 1712a0584ee9SChuck Lever out: 17131da177e4SLinus Torvalds gss_put_ctx(ctx); 17142876a344SJ. Bruce Fields kfree(seq); 1715a0584ee9SChuck Lever return status; 1716a0584ee9SChuck Lever 1717a0584ee9SChuck Lever validate_failed: 1718a0584ee9SChuck Lever status = -EIO; 1719a0584ee9SChuck Lever goto out; 1720a0584ee9SChuck Lever bad_mic: 17210c77668dSChuck Lever trace_rpcgss_verify_mic(task, maj_stat); 1722a0584ee9SChuck Lever status = -EACCES; 1723a0584ee9SChuck Lever goto out; 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds 1726e8680a24SChuck Lever static int gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1727e8680a24SChuck Lever struct rpc_task *task, struct xdr_stream *xdr) 17289f06c719SChuck Lever { 1729e8680a24SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 1730e8680a24SChuck Lever struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf; 17311da177e4SLinus Torvalds struct xdr_netobj mic; 1732e8680a24SChuck Lever __be32 *p, *integ_len; 1733e8680a24SChuck Lever u32 offset, maj_stat; 17341da177e4SLinus Torvalds 1735e8680a24SChuck Lever p = xdr_reserve_space(xdr, 2 * sizeof(*p)); 1736e8680a24SChuck Lever if (!p) 1737e8680a24SChuck Lever goto wrap_failed; 17381da177e4SLinus Torvalds integ_len = p++; 1739e8680a24SChuck Lever *p = cpu_to_be32(rqstp->rq_seqno); 1740e8680a24SChuck Lever 1741e8680a24SChuck Lever if (rpcauth_wrap_req_encode(task, xdr)) 1742e8680a24SChuck Lever goto wrap_failed; 1743e8680a24SChuck Lever 17441da177e4SLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 17451da177e4SLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 17461da177e4SLinus Torvalds offset, snd_buf->len - offset)) 1747e8680a24SChuck Lever goto wrap_failed; 1748e8680a24SChuck Lever *integ_len = cpu_to_be32(integ_buf.len); 17491da177e4SLinus Torvalds 1750e8680a24SChuck Lever p = xdr_reserve_space(xdr, 0); 1751e8680a24SChuck Lever if (!p) 1752e8680a24SChuck Lever goto wrap_failed; 17531da177e4SLinus Torvalds mic.data = (u8 *)(p + 1); 175400fd6e14SJ. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 17551da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1756fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 17571da177e4SLinus Torvalds else if (maj_stat) 17580c77668dSChuck Lever goto bad_mic; 1759e8680a24SChuck Lever /* Check that the trailing MIC fit in the buffer, after the fact */ 1760e8680a24SChuck Lever if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) 1761e8680a24SChuck Lever goto wrap_failed; 17621da177e4SLinus Torvalds return 0; 1763e8680a24SChuck Lever wrap_failed: 1764e8680a24SChuck Lever return -EMSGSIZE; 17650c77668dSChuck Lever bad_mic: 17660c77668dSChuck Lever trace_rpcgss_get_mic(task, maj_stat); 17670c77668dSChuck Lever return -EIO; 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds 17702d2da60cSJ. Bruce Fields static void 17712d2da60cSJ. Bruce Fields priv_release_snd_buf(struct rpc_rqst *rqstp) 17722d2da60cSJ. Bruce Fields { 17732d2da60cSJ. Bruce Fields int i; 17742d2da60cSJ. Bruce Fields 17752d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 17762d2da60cSJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 17772d2da60cSJ. Bruce Fields kfree(rqstp->rq_enc_pages); 17788dae5398SChuck Lever rqstp->rq_release_snd_buf = NULL; 17792d2da60cSJ. Bruce Fields } 17802d2da60cSJ. Bruce Fields 17812d2da60cSJ. Bruce Fields static int 17822d2da60cSJ. Bruce Fields alloc_enc_pages(struct rpc_rqst *rqstp) 17832d2da60cSJ. Bruce Fields { 17842d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 17852d2da60cSJ. Bruce Fields int first, last, i; 17862d2da60cSJ. Bruce Fields 17878dae5398SChuck Lever if (rqstp->rq_release_snd_buf) 17888dae5398SChuck Lever rqstp->rq_release_snd_buf(rqstp); 17898dae5398SChuck Lever 17902d2da60cSJ. Bruce Fields if (snd_buf->page_len == 0) { 17912d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 17922d2da60cSJ. Bruce Fields return 0; 17932d2da60cSJ. Bruce Fields } 17942d2da60cSJ. Bruce Fields 179509cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 179609cbfeafSKirill A. Shutemov last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; 17972d2da60cSJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 17982d2da60cSJ. Bruce Fields rqstp->rq_enc_pages 17996da2ec56SKees Cook = kmalloc_array(rqstp->rq_enc_pages_num, 18006da2ec56SKees Cook sizeof(struct page *), 18012d2da60cSJ. Bruce Fields GFP_NOFS); 18022d2da60cSJ. Bruce Fields if (!rqstp->rq_enc_pages) 18032d2da60cSJ. Bruce Fields goto out; 18042d2da60cSJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 18052d2da60cSJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 18062d2da60cSJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 18072d2da60cSJ. Bruce Fields goto out_free; 18082d2da60cSJ. Bruce Fields } 18092d2da60cSJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 18102d2da60cSJ. Bruce Fields return 0; 18112d2da60cSJ. Bruce Fields out_free: 1812cdead7cfSTrond Myklebust rqstp->rq_enc_pages_num = i; 1813cdead7cfSTrond Myklebust priv_release_snd_buf(rqstp); 18142d2da60cSJ. Bruce Fields out: 18152d2da60cSJ. Bruce Fields return -EAGAIN; 18162d2da60cSJ. Bruce Fields } 18172d2da60cSJ. Bruce Fields 1818e8680a24SChuck Lever static int gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1819e8680a24SChuck Lever struct rpc_task *task, struct xdr_stream *xdr) 18202d2da60cSJ. Bruce Fields { 1821e8680a24SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 18222d2da60cSJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 1823e8680a24SChuck Lever u32 pad, offset, maj_stat; 18242d2da60cSJ. Bruce Fields int status; 1825e8680a24SChuck Lever __be32 *p, *opaque_len; 18262d2da60cSJ. Bruce Fields struct page **inpages; 18272d2da60cSJ. Bruce Fields int first; 18282d2da60cSJ. Bruce Fields struct kvec *iov; 18292d2da60cSJ. Bruce Fields 1830e8680a24SChuck Lever status = -EIO; 1831e8680a24SChuck Lever p = xdr_reserve_space(xdr, 2 * sizeof(*p)); 1832e8680a24SChuck Lever if (!p) 1833e8680a24SChuck Lever goto wrap_failed; 18342d2da60cSJ. Bruce Fields opaque_len = p++; 1835e8680a24SChuck Lever *p = cpu_to_be32(rqstp->rq_seqno); 18362d2da60cSJ. Bruce Fields 1837e8680a24SChuck Lever if (rpcauth_wrap_req_encode(task, xdr)) 1838e8680a24SChuck Lever goto wrap_failed; 18392d2da60cSJ. Bruce Fields 18402d2da60cSJ. Bruce Fields status = alloc_enc_pages(rqstp); 1841e8680a24SChuck Lever if (unlikely(status)) 1842e8680a24SChuck Lever goto wrap_failed; 184309cbfeafSKirill A. Shutemov first = snd_buf->page_base >> PAGE_SHIFT; 18442d2da60cSJ. Bruce Fields inpages = snd_buf->pages + first; 18452d2da60cSJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 184609cbfeafSKirill A. Shutemov snd_buf->page_base -= first << PAGE_SHIFT; 18477561042fSKevin Coffman /* 1848e8680a24SChuck Lever * Move the tail into its own page, in case gss_wrap needs 1849e8680a24SChuck Lever * more space in the head when wrapping. 18507561042fSKevin Coffman * 1851e8680a24SChuck Lever * Still... Why can't gss_wrap just slide the tail down? 18527561042fSKevin Coffman */ 18532d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 1854e8680a24SChuck Lever char *tmp; 1855e8680a24SChuck Lever 18562d2da60cSJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 18572d2da60cSJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 18582d2da60cSJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 18592d2da60cSJ. Bruce Fields } 1860e8680a24SChuck Lever offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 186100fd6e14SJ. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 18627561042fSKevin Coffman /* slack space should prevent this ever happening: */ 1863e8680a24SChuck Lever if (unlikely(snd_buf->len > snd_buf->buflen)) 1864e8680a24SChuck Lever goto wrap_failed; 18652d2da60cSJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 18662d2da60cSJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 18672d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1868fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 18692d2da60cSJ. Bruce Fields else if (maj_stat) 18700c77668dSChuck Lever goto bad_wrap; 18712d2da60cSJ. Bruce Fields 1872e8680a24SChuck Lever *opaque_len = cpu_to_be32(snd_buf->len - offset); 1873e8680a24SChuck Lever /* guess whether the pad goes into the head or the tail: */ 18742d2da60cSJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 18752d2da60cSJ. Bruce Fields iov = snd_buf->tail; 18762d2da60cSJ. Bruce Fields else 18772d2da60cSJ. Bruce Fields iov = snd_buf->head; 18782d2da60cSJ. Bruce Fields p = iov->iov_base + iov->iov_len; 18792d2da60cSJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 18802d2da60cSJ. Bruce Fields memset(p, 0, pad); 18812d2da60cSJ. Bruce Fields iov->iov_len += pad; 18822d2da60cSJ. Bruce Fields snd_buf->len += pad; 18832d2da60cSJ. Bruce Fields 18842d2da60cSJ. Bruce Fields return 0; 1885e8680a24SChuck Lever wrap_failed: 1886e8680a24SChuck Lever return status; 18870c77668dSChuck Lever bad_wrap: 18880c77668dSChuck Lever trace_rpcgss_wrap(task, maj_stat); 18890c77668dSChuck Lever return -EIO; 18902d2da60cSJ. Bruce Fields } 18912d2da60cSJ. Bruce Fields 1892e8680a24SChuck Lever static int gss_wrap_req(struct rpc_task *task, struct xdr_stream *xdr) 18931da177e4SLinus Torvalds { 1894a17c2153STrond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 18951da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 18961da177e4SLinus Torvalds gc_base); 18971da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1898e8680a24SChuck Lever int status; 18991da177e4SLinus Torvalds 1900e8680a24SChuck Lever status = -EIO; 19011da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 19021da177e4SLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 19031da177e4SLinus Torvalds * wrapping context destruction requests makes the most sense. 19041da177e4SLinus Torvalds */ 1905e8680a24SChuck Lever status = rpcauth_wrap_req_encode(task, xdr); 19061da177e4SLinus Torvalds goto out; 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds switch (gss_cred->gc_service) { 19091da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 1910e8680a24SChuck Lever status = rpcauth_wrap_req_encode(task, xdr); 19111da177e4SLinus Torvalds break; 19121da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 1913e8680a24SChuck Lever status = gss_wrap_req_integ(cred, ctx, task, xdr); 19141da177e4SLinus Torvalds break; 19151da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 1916e8680a24SChuck Lever status = gss_wrap_req_priv(cred, ctx, task, xdr); 19171da177e4SLinus Torvalds break; 19180c77668dSChuck Lever default: 19190c77668dSChuck Lever status = -EIO; 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds out: 19221da177e4SLinus Torvalds gss_put_ctx(ctx); 19231da177e4SLinus Torvalds return status; 19241da177e4SLinus Torvalds } 19251da177e4SLinus Torvalds 1926a0584ee9SChuck Lever static int 1927a0584ee9SChuck Lever gss_unwrap_resp_auth(struct rpc_cred *cred) 19281da177e4SLinus Torvalds { 192935e77d21SChuck Lever struct rpc_auth *auth = cred->cr_auth; 193035e77d21SChuck Lever 193135e77d21SChuck Lever auth->au_rslack = auth->au_verfsize; 193235e77d21SChuck Lever auth->au_ralign = auth->au_verfsize; 1933a0584ee9SChuck Lever return 0; 1934a0584ee9SChuck Lever } 19351da177e4SLinus Torvalds 1936a0584ee9SChuck Lever static int 19370c77668dSChuck Lever gss_unwrap_resp_integ(struct rpc_task *task, struct rpc_cred *cred, 19380c77668dSChuck Lever struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, 19390c77668dSChuck Lever struct xdr_stream *xdr) 1940a0584ee9SChuck Lever { 1941a0584ee9SChuck Lever struct xdr_buf integ_buf, *rcv_buf = &rqstp->rq_rcv_buf; 1942a0584ee9SChuck Lever u32 data_offset, mic_offset, integ_len, maj_stat; 194335e77d21SChuck Lever struct rpc_auth *auth = cred->cr_auth; 1944a0584ee9SChuck Lever struct xdr_netobj mic; 1945a0584ee9SChuck Lever __be32 *p; 1946a0584ee9SChuck Lever 1947a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1948a0584ee9SChuck Lever if (unlikely(!p)) 1949a0584ee9SChuck Lever goto unwrap_failed; 1950a0584ee9SChuck Lever integ_len = be32_to_cpup(p++); 19511da177e4SLinus Torvalds if (integ_len & 3) 1952a0584ee9SChuck Lever goto unwrap_failed; 1953a0584ee9SChuck Lever data_offset = (u8 *)(p) - (u8 *)rcv_buf->head[0].iov_base; 19541da177e4SLinus Torvalds mic_offset = integ_len + data_offset; 19551da177e4SLinus Torvalds if (mic_offset > rcv_buf->len) 1956a0584ee9SChuck Lever goto unwrap_failed; 1957a0584ee9SChuck Lever if (be32_to_cpup(p) != rqstp->rq_seqno) 19580c77668dSChuck Lever goto bad_seqno; 19591da177e4SLinus Torvalds 1960a0584ee9SChuck Lever if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, integ_len)) 1961a0584ee9SChuck Lever goto unwrap_failed; 19621da177e4SLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 1963a0584ee9SChuck Lever goto unwrap_failed; 196400fd6e14SJ. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 19651da177e4SLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1966fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 19671da177e4SLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 1968a0584ee9SChuck Lever goto bad_mic; 1969a0584ee9SChuck Lever 197035e77d21SChuck Lever auth->au_rslack = auth->au_verfsize + 2 + 1 + XDR_QUADLEN(mic.len); 197135e77d21SChuck Lever auth->au_ralign = auth->au_verfsize + 2; 19721da177e4SLinus Torvalds return 0; 1973a0584ee9SChuck Lever unwrap_failed: 19740c77668dSChuck Lever trace_rpcgss_unwrap_failed(task); 19750c77668dSChuck Lever return -EIO; 19760c77668dSChuck Lever bad_seqno: 19770c77668dSChuck Lever trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(p)); 1978a0584ee9SChuck Lever return -EIO; 1979a0584ee9SChuck Lever bad_mic: 19800c77668dSChuck Lever trace_rpcgss_verify_mic(task, maj_stat); 1981a0584ee9SChuck Lever return -EIO; 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 1984a0584ee9SChuck Lever static int 19850c77668dSChuck Lever gss_unwrap_resp_priv(struct rpc_task *task, struct rpc_cred *cred, 19860c77668dSChuck Lever struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, 19870c77668dSChuck Lever struct xdr_stream *xdr) 19882d2da60cSJ. Bruce Fields { 19892d2da60cSJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 1990a0584ee9SChuck Lever struct kvec *head = rqstp->rq_rcv_buf.head; 199135e77d21SChuck Lever struct rpc_auth *auth = cred->cr_auth; 1992a0584ee9SChuck Lever unsigned int savedlen = rcv_buf->len; 1993a0584ee9SChuck Lever u32 offset, opaque_len, maj_stat; 1994a0584ee9SChuck Lever __be32 *p; 19952d2da60cSJ. Bruce Fields 1996a0584ee9SChuck Lever p = xdr_inline_decode(xdr, 2 * sizeof(*p)); 1997a0584ee9SChuck Lever if (unlikely(!p)) 1998a0584ee9SChuck Lever goto unwrap_failed; 1999a0584ee9SChuck Lever opaque_len = be32_to_cpup(p++); 2000a0584ee9SChuck Lever offset = (u8 *)(p) - (u8 *)head->iov_base; 20012d2da60cSJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 2002a0584ee9SChuck Lever goto unwrap_failed; 20032d2da60cSJ. Bruce Fields rcv_buf->len = offset + opaque_len; 20042d2da60cSJ. Bruce Fields 200500fd6e14SJ. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 20062d2da60cSJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 2007fc432dd9STrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 20082d2da60cSJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 2009a0584ee9SChuck Lever goto bad_unwrap; 2010a0584ee9SChuck Lever /* gss_unwrap decrypted the sequence number */ 2011a0584ee9SChuck Lever if (be32_to_cpup(p++) != rqstp->rq_seqno) 20120c77668dSChuck Lever goto bad_seqno; 20132d2da60cSJ. Bruce Fields 2014a0584ee9SChuck Lever /* gss_unwrap redacts the opaque blob from the head iovec. 2015a0584ee9SChuck Lever * rcv_buf has changed, thus the stream needs to be reset. 2016a0584ee9SChuck Lever */ 2017a0584ee9SChuck Lever xdr_init_decode(xdr, rcv_buf, p, rqstp); 2018a0584ee9SChuck Lever 201935e77d21SChuck Lever auth->au_rslack = auth->au_verfsize + 2 + 202035e77d21SChuck Lever XDR_QUADLEN(savedlen - rcv_buf->len); 202135e77d21SChuck Lever auth->au_ralign = auth->au_verfsize + 2 + 2022a0584ee9SChuck Lever XDR_QUADLEN(savedlen - rcv_buf->len); 20232d2da60cSJ. Bruce Fields return 0; 2024a0584ee9SChuck Lever unwrap_failed: 20250c77668dSChuck Lever trace_rpcgss_unwrap_failed(task); 20260c77668dSChuck Lever return -EIO; 20270c77668dSChuck Lever bad_seqno: 20280c77668dSChuck Lever trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(--p)); 2029a0584ee9SChuck Lever return -EIO; 2030a0584ee9SChuck Lever bad_unwrap: 20310c77668dSChuck Lever trace_rpcgss_unwrap(task, maj_stat); 2032a0584ee9SChuck Lever return -EIO; 2033bf269551SChuck Lever } 20342d2da60cSJ. Bruce Fields 20353021a5bbSTrond Myklebust static bool 20363021a5bbSTrond Myklebust gss_seq_is_newer(u32 new, u32 old) 20373021a5bbSTrond Myklebust { 20383021a5bbSTrond Myklebust return (s32)(new - old) > 0; 20393021a5bbSTrond Myklebust } 20403021a5bbSTrond Myklebust 20413021a5bbSTrond Myklebust static bool 20423021a5bbSTrond Myklebust gss_xmit_need_reencode(struct rpc_task *task) 20433021a5bbSTrond Myklebust { 20443021a5bbSTrond Myklebust struct rpc_rqst *req = task->tk_rqstp; 20453021a5bbSTrond Myklebust struct rpc_cred *cred = req->rq_cred; 20463021a5bbSTrond Myklebust struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20470c77668dSChuck Lever u32 win, seq_xmit = 0; 20483021a5bbSTrond Myklebust bool ret = true; 20493021a5bbSTrond Myklebust 20503021a5bbSTrond Myklebust if (!ctx) 20510c77668dSChuck Lever goto out; 20523021a5bbSTrond Myklebust 20533021a5bbSTrond Myklebust if (gss_seq_is_newer(req->rq_seqno, READ_ONCE(ctx->gc_seq))) 20540c77668dSChuck Lever goto out_ctx; 20553021a5bbSTrond Myklebust 20563021a5bbSTrond Myklebust seq_xmit = READ_ONCE(ctx->gc_seq_xmit); 20573021a5bbSTrond Myklebust while (gss_seq_is_newer(req->rq_seqno, seq_xmit)) { 20583021a5bbSTrond Myklebust u32 tmp = seq_xmit; 20593021a5bbSTrond Myklebust 20603021a5bbSTrond Myklebust seq_xmit = cmpxchg(&ctx->gc_seq_xmit, tmp, req->rq_seqno); 20613021a5bbSTrond Myklebust if (seq_xmit == tmp) { 20623021a5bbSTrond Myklebust ret = false; 20630c77668dSChuck Lever goto out_ctx; 20643021a5bbSTrond Myklebust } 20653021a5bbSTrond Myklebust } 20663021a5bbSTrond Myklebust 20673021a5bbSTrond Myklebust win = ctx->gc_win; 20683021a5bbSTrond Myklebust if (win > 0) 20693021a5bbSTrond Myklebust ret = !gss_seq_is_newer(req->rq_seqno, seq_xmit - win); 20700c77668dSChuck Lever 20710c77668dSChuck Lever out_ctx: 20723021a5bbSTrond Myklebust gss_put_ctx(ctx); 20730c77668dSChuck Lever out: 20740c77668dSChuck Lever trace_rpcgss_need_reencode(task, seq_xmit, ret); 20753021a5bbSTrond Myklebust return ret; 20763021a5bbSTrond Myklebust } 20773021a5bbSTrond Myklebust 20781da177e4SLinus Torvalds static int 2079a0584ee9SChuck Lever gss_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr) 20801da177e4SLinus Torvalds { 2081a0584ee9SChuck Lever struct rpc_rqst *rqstp = task->tk_rqstp; 2082a0584ee9SChuck Lever struct rpc_cred *cred = rqstp->rq_cred; 20831da177e4SLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 20841da177e4SLinus Torvalds gc_base); 20851da177e4SLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 20861da177e4SLinus Torvalds int status = -EIO; 20871da177e4SLinus Torvalds 20881da177e4SLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 20891da177e4SLinus Torvalds goto out_decode; 20901da177e4SLinus Torvalds switch (gss_cred->gc_service) { 20911da177e4SLinus Torvalds case RPC_GSS_SVC_NONE: 2092a0584ee9SChuck Lever status = gss_unwrap_resp_auth(cred); 20931da177e4SLinus Torvalds break; 20941da177e4SLinus Torvalds case RPC_GSS_SVC_INTEGRITY: 20950c77668dSChuck Lever status = gss_unwrap_resp_integ(task, cred, ctx, rqstp, xdr); 20961da177e4SLinus Torvalds break; 20971da177e4SLinus Torvalds case RPC_GSS_SVC_PRIVACY: 20980c77668dSChuck Lever status = gss_unwrap_resp_priv(task, cred, ctx, rqstp, xdr); 20991da177e4SLinus Torvalds break; 21001da177e4SLinus Torvalds } 2101a0584ee9SChuck Lever if (status) 2102a0584ee9SChuck Lever goto out; 2103a0584ee9SChuck Lever 21041da177e4SLinus Torvalds out_decode: 2105a0584ee9SChuck Lever status = rpcauth_unwrap_resp_decode(task, xdr); 21061da177e4SLinus Torvalds out: 21071da177e4SLinus Torvalds gss_put_ctx(ctx); 21081da177e4SLinus Torvalds return status; 21091da177e4SLinus Torvalds } 21101da177e4SLinus Torvalds 2111f1c0a861STrond Myklebust static const struct rpc_authops authgss_ops = { 21121da177e4SLinus Torvalds .owner = THIS_MODULE, 21131da177e4SLinus Torvalds .au_flavor = RPC_AUTH_GSS, 21141da177e4SLinus Torvalds .au_name = "RPCSEC_GSS", 21151da177e4SLinus Torvalds .create = gss_create, 21161da177e4SLinus Torvalds .destroy = gss_destroy, 2117a960f8d6SFrank Sorenson .hash_cred = gss_hash_cred, 21181da177e4SLinus Torvalds .lookup_cred = gss_lookup_cred, 211980df9d20SStanislav Kinsbursky .crcreate = gss_create_cred, 21206a1a1e34SChuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 21219568c5e9SChuck Lever .info2flavor = gss_mech_info2flavor, 2122a77c806fSChuck Lever .flavor2info = gss_mech_flavor2info, 21231da177e4SLinus Torvalds }; 21241da177e4SLinus Torvalds 2125f1c0a861STrond Myklebust static const struct rpc_credops gss_credops = { 21261da177e4SLinus Torvalds .cr_name = "AUTH_GSS", 21271da177e4SLinus Torvalds .crdestroy = gss_destroy_cred, 2128fba3bad4STrond Myklebust .cr_init = gss_cred_init, 21291da177e4SLinus Torvalds .crmatch = gss_match, 21301da177e4SLinus Torvalds .crmarshal = gss_marshal, 21311da177e4SLinus Torvalds .crrefresh = gss_refresh, 21321da177e4SLinus Torvalds .crvalidate = gss_validate, 21331da177e4SLinus Torvalds .crwrap_req = gss_wrap_req, 21341da177e4SLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 21354de6caa2SAndy Adamson .crkey_timeout = gss_key_timeout, 2136a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21373021a5bbSTrond Myklebust .crneed_reencode = gss_xmit_need_reencode, 21381da177e4SLinus Torvalds }; 21391da177e4SLinus Torvalds 21400df7fb74STrond Myklebust static const struct rpc_credops gss_nullops = { 21410df7fb74STrond Myklebust .cr_name = "AUTH_GSS", 21426dcd3926SJeff Layton .crdestroy = gss_destroy_nullcred, 21430df7fb74STrond Myklebust .crmatch = gss_match, 21440df7fb74STrond Myklebust .crmarshal = gss_marshal, 21450df7fb74STrond Myklebust .crrefresh = gss_refresh_null, 21460df7fb74STrond Myklebust .crvalidate = gss_validate, 21470df7fb74STrond Myklebust .crwrap_req = gss_wrap_req, 21480df7fb74STrond Myklebust .crunwrap_resp = gss_unwrap_resp, 2149a0337d1dSJeff Layton .crstringify_acceptor = gss_stringify_acceptor, 21500df7fb74STrond Myklebust }; 21510df7fb74STrond Myklebust 2152b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v0 = { 2153ac83228aSTrond Myklebust .upcall = gss_v0_upcall, 21541da177e4SLinus Torvalds .downcall = gss_pipe_downcall, 21551da177e4SLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 215634769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 215734769fc4S\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 215834769fc4S\"J. Bruce Fields\ }; 215934769fc4S\"J. Bruce Fields\ 2160b693ba4aSTrond Myklebust static const struct rpc_pipe_ops gss_upcall_ops_v1 = { 2161ac83228aSTrond Myklebust .upcall = gss_v1_upcall, 216234769fc4S\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 216334769fc4S\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 216434769fc4S\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 21651da177e4SLinus Torvalds .release_pipe = gss_pipe_release, 21661da177e4SLinus Torvalds }; 21671da177e4SLinus Torvalds 2168a1db410dSStanislav Kinsbursky static __net_init int rpcsec_gss_init_net(struct net *net) 2169a1db410dSStanislav Kinsbursky { 2170a1db410dSStanislav Kinsbursky return gss_svc_init_net(net); 2171a1db410dSStanislav Kinsbursky } 2172a1db410dSStanislav Kinsbursky 2173a1db410dSStanislav Kinsbursky static __net_exit void rpcsec_gss_exit_net(struct net *net) 2174a1db410dSStanislav Kinsbursky { 2175a1db410dSStanislav Kinsbursky gss_svc_shutdown_net(net); 2176a1db410dSStanislav Kinsbursky } 2177a1db410dSStanislav Kinsbursky 2178a1db410dSStanislav Kinsbursky static struct pernet_operations rpcsec_gss_net_ops = { 2179a1db410dSStanislav Kinsbursky .init = rpcsec_gss_init_net, 2180a1db410dSStanislav Kinsbursky .exit = rpcsec_gss_exit_net, 2181a1db410dSStanislav Kinsbursky }; 2182a1db410dSStanislav Kinsbursky 21831da177e4SLinus Torvalds /* 21841da177e4SLinus Torvalds * Initialize RPCSEC_GSS module 21851da177e4SLinus Torvalds */ 21861da177e4SLinus Torvalds static int __init init_rpcsec_gss(void) 21871da177e4SLinus Torvalds { 21881da177e4SLinus Torvalds int err = 0; 21891da177e4SLinus Torvalds 21901da177e4SLinus Torvalds err = rpcauth_register(&authgss_ops); 21911da177e4SLinus Torvalds if (err) 21921da177e4SLinus Torvalds goto out; 21931da177e4SLinus Torvalds err = gss_svc_init(); 21941da177e4SLinus Torvalds if (err) 21951da177e4SLinus Torvalds goto out_unregister; 2196a1db410dSStanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 2197a1db410dSStanislav Kinsbursky if (err) 2198a1db410dSStanislav Kinsbursky goto out_svc_exit; 219979a3f20bS\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 22001da177e4SLinus Torvalds return 0; 2201a1db410dSStanislav Kinsbursky out_svc_exit: 2202a1db410dSStanislav Kinsbursky gss_svc_shutdown(); 22031da177e4SLinus Torvalds out_unregister: 22041da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 22051da177e4SLinus Torvalds out: 22061da177e4SLinus Torvalds return err; 22071da177e4SLinus Torvalds } 22081da177e4SLinus Torvalds 22091da177e4SLinus Torvalds static void __exit exit_rpcsec_gss(void) 22101da177e4SLinus Torvalds { 2211a1db410dSStanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 22121da177e4SLinus Torvalds gss_svc_shutdown(); 22131da177e4SLinus Torvalds rpcauth_unregister(&authgss_ops); 2214bf12691dSJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 22151da177e4SLinus Torvalds } 22161da177e4SLinus Torvalds 221771afa85eSChuck Lever MODULE_ALIAS("rpc-auth-6"); 22181da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 2219126e216aSTrond Myklebust module_param_named(expired_cred_retry_delay, 2220126e216aSTrond Myklebust gss_expired_cred_retry_delay, 2221126e216aSTrond Myklebust uint, 0644); 2222126e216aSTrond Myklebust MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 2223126e216aSTrond Myklebust "the RPC engine retries an expired credential"); 2224126e216aSTrond Myklebust 22254de6caa2SAndy Adamson module_param_named(key_expire_timeo, 22264de6caa2SAndy Adamson gss_key_expire_timeo, 22274de6caa2SAndy Adamson uint, 0644); 22284de6caa2SAndy Adamson MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " 22294de6caa2SAndy Adamson "credential keys lifetime where the NFS layer cleans up " 22304de6caa2SAndy Adamson "prior to key expiration"); 22314de6caa2SAndy Adamson 22321da177e4SLinus Torvalds module_init(init_rpcsec_gss) 22331da177e4SLinus Torvalds module_exit(exit_rpcsec_gss) 2234