auth_gss.c revision 400f26b542e86995662a0cc5483656b7b1f42af6
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2f30c2269544bffc7bf1b0d7c0abe5be1be83b8cbUwe Zeisberger * linux/net/sunrpc/auth_gss/auth_gss.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * RPCSEC_GSS client authentication. 5cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 2000 The Regents of the University of Michigan. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Dug Song <dugsong@monkey.org> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Andy Adamson <andros@umich.edu> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or without 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modification, are permitted provided that the following conditions 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are met: 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1. Redistributions of source code must retain the above copyright 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer in the 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * documentation and/or other materials provided with the distribution. 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3. Neither the name of the University nor the names of its 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * contributors may be used to endorse or promote products derived 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * from this software without specific prior written permission. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 442d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields#include <linux/pagemap.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/clnt.h> 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/auth_gss.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/svcauth_gss.h> 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_err.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/workqueue.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/rpc_pipe_fs.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sunrpc/gss_api.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 55f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_authops authgss_ops; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 57f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_credops gss_credops; 580df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic const struct rpc_credops gss_nullops; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 60126e216a8730532dfb685205309275f87e3d133eTrond Myklebust#define GSS_RETRY_EXPIRED 5 61126e216a8730532dfb685205309275f87e3d133eTrond Myklebuststatic unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; 62126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef RPC_DEBUG 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define RPCDBG_FACILITY RPCDBG_AUTH 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 67725f2865d4df31ac0768b13ae763beadc4bb8ce9Kevin Coffman#define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* length of a krb5 verifier (48), plus data added before arguments when 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * using integrity (two 4-byte integers): */ 70adeb8133dd57f380e70a389a89a2ea3ae227f9e2Olga Kornievskaia#define GSS_VERF_SLACK 100 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_auth { 730285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct kref kref; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth rpc_auth; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_api_mech *mech; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum rpc_gss_svc service; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_clnt *client; 7834769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ /* 7934769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * There are two upcall pipes; dentry[1], named "gssd", is used 8034769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * for the new text-based upcall; dentry[0] is named after the 8134769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * mechanism (for example, "krb5") and exists for 8234769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * backwards-compatibility with older gssd's. 8334769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ */ 84c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky struct rpc_pipe *pipe[2]; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8779a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\/* pipe_version >= 0 if and only if someone has a pipe open. */ 8879a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\static int pipe_version = -1; 89cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\static atomic_t pipe_users = ATOMIC_INIT(0); 9079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\static DEFINE_SPINLOCK(pipe_version_lock); 9179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\static struct rpc_wait_queue pipe_version_rpc_waitqueue; 9279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); 93cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\ 945d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void gss_free_ctx(struct gss_cl_ctx *); 95b693ba4a338da15db1db4b5ebaa36e4ab9781c82Trond Myklebuststatic const struct rpc_pipe_ops gss_upcall_ops_v0; 96b693ba4a338da15db1db4b5ebaa36e4ab9781c82Trond Myklebuststatic const struct rpc_pipe_ops gss_upcall_ops_v1; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_cl_ctx * 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_get_ctx(struct gss_cl_ctx *ctx) 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&ctx->count); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_put_ctx(struct gss_cl_ctx *ctx) 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (atomic_dec_and_test(&ctx->count)) 1095d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_free_ctx(ctx); 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1125d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust/* gss_cred_set_ctx: 1135d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * called by gss_upcall_callback and gss_create_upcall in order 1145d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust * to set the gss context. The actual exchange of an old context 1159beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky * and a new one is protected by the pipe->lock. 1165d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust */ 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1215d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 122cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 123cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return; 1247b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_get_ctx(ctx); 125cf778b00e96df6d64f8e21b8395d1f8a859ecdc7Eric Dumazet rcu_assign_pointer(gss_cred->gc_ctx, ctx); 126fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 127cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust smp_mb__before_clear_bit(); 128fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_bytes(const void *p, const void *end, void *res, size_t len) 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q = (const void *)((const char *)p + len); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(res, p, len); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline const void * 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssimple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &len, sizeof(len)); 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + len); 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-EFAULT); 1530f38b873aeaae698c3693748438547c8493165fbTrond Myklebust dest->data = kmemdup(p, len, GFP_NOFS); 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(dest->data == NULL)) 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOMEM); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dest->len = len; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_cred_get_ctx(struct rpc_cred *cred) 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = NULL; 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1665d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_lock(); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_ctx) 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_get_ctx(gss_cred->gc_ctx); 1695d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust rcu_read_unlock(); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_cl_ctx * 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_alloc_context(void) 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1780f38b873aeaae698c3693748438547c8493165fbTrond Myklebust ctx = kzalloc(sizeof(*ctx), GFP_NOFS); 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx != NULL) { 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_proc = RPC_GSS_PROC_DATA; 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&ctx->gc_seq_lock); 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&ctx->count,1); 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ctx; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GSSD_MIN_TIMEOUT (60 * 60) 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const void * 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *q; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int seclen; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int timeout; 195620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson unsigned long now = jiffies; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 window_size; 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 199620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson /* First unsigned int gives the remaining lifetime in seconds of the 200620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson * credential - e.g. the remaining TGT lifetime for Kerberos or 201620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson * the -t value passed to GSSD. 202620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout == 0) 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = GSSD_MIN_TIMEOUT; 208620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson ctx->gc_expiry = now + ((unsigned long)timeout * HZ); 209620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson /* Sequence number window. Determines the maximum number of 210620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson * simultaneous requests 211620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson */ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx->gc_win = window_size; 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gssd signals an error by passing ctx->gc_win = 0: */ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_win == 0) { 218dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton /* 219dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton * in which case, p points to an error code. Anything other 220dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton * than -EKEYEXPIRED gets converted to -EACCES. 221dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton */ 222dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton p = simple_get_bytes(p, end, &ret, sizeof(ret)); 223dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton if (!IS_ERR(p)) 224dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : 225dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton ERR_PTR(-EACCES); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* copy the opaque wire context */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* import the opaque security context */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = (const void *)((const char *)p + seclen); 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(q > end || q < p)) { 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(-EFAULT); 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 241400f26b542e86995662a0cc5483656b7b1f42af6Simo Sorce ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret < 0) { 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = ERR_PTR(ret); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 246620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", 247620038f6d2304475dce800dc5c75fc335a19613aAndy Adamson __func__, ctx->gc_expiry, now, timeout); 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return q; 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 250173db3093474e7691f2c2f3136313565bd366f6cJeff Layton dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\#define UPCALL_BUF_LEN 128 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct gss_upcall_msg { 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_t count; 2587eaf040b720bc8c0ce5cd49151ca194ca2d56842Eric W. Biederman kuid_t uid; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_pipe_msg msg; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *auth; 2629beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe; 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_wait_queue rpc_waitqueue; 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t waitqueue; 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 26634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ char databuf[UPCALL_BUF_LEN]; 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26979a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\static int get_pipe_version(void) 27079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\{ 27179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ int ret; 27279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ 27379a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 27479a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ if (pipe_version >= 0) { 27579a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ atomic_inc(&pipe_users); 27634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ ret = pipe_version; 27779a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ } else 27879a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ ret = -EAGAIN; 27979a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ return ret; 28179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\} 28279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ 28379a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\static void put_pipe_version(void) 28479a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\{ 28579a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ if (atomic_dec_and_lock(&pipe_users, &pipe_version_lock)) { 28679a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ pipe_version = -1; 28779a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 28879a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ } 28979a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\} 29079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_release_msg(struct gss_upcall_msg *gss_msg) 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!atomic_dec_and_test(&gss_msg->count)) 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 29679a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ put_pipe_version(); 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUG_ON(!list_empty(&gss_msg->list)); 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL) 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(gss_msg->ctx); 300f6a1cc89309f0ae847a9b6fe418d1c4215e5bc55Trond Myklebust rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_msg); 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 3057eaf040b720bc8c0ce5cd49151ca194ca2d56842Eric W. Biederman__gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *pos; 3089beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky list_for_each_entry(pos, &pipe->in_downcall, list) { 3090b4d51b02a2e941beec6f02a6c7a32c5a28c5b43Eric W. Biederman if (!uid_eq(pos->uid, uid)) 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&pos->count); 312632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s found msg %p\n", __func__, pos); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pos; 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 315632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s found nothing\n", __func__); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 319720b8f2d6f7de9e16f1217448cc7396e1604e175\\\"J. Bruce Fields\\\/* Try to add an upcall to the pipefs queue. 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If an upcall owned by our uid already exists, then we return a reference 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to that upcall instead of adding the new upcall. 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct gss_upcall_msg * 324053e324f67b9921fe7de0c4cbc720d29cb4bf207Suresh Jayaramangss_add_msg(struct gss_upcall_msg *gss_msg) 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3269beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *old; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3299beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 3309beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky old = __gss_find_upcall(pipe, gss_msg->uid); 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old == NULL) { 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 3339beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky list_add(&gss_msg->list, &pipe->in_downcall); 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = old; 3369beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__gss_unhash_msg(struct gss_upcall_msg *gss_msg) 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init(&gss_msg->list); 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_all(&gss_msg->waitqueue); 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec(&gss_msg->count); 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unhash_msg(struct gss_upcall_msg *gss_msg) 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3529beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3543b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (list_empty(&gss_msg->list)) 3553b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust return; 3569beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 3573b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (!list_empty(&gss_msg->list)) 3583b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust __gss_unhash_msg(gss_msg); 3599beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 363126e216a8730532dfb685205309275f87e3d133eTrond Myklebustgss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) 364126e216a8730532dfb685205309275f87e3d133eTrond Myklebust{ 365126e216a8730532dfb685205309275f87e3d133eTrond Myklebust switch (gss_msg->msg.errno) { 366126e216a8730532dfb685205309275f87e3d133eTrond Myklebust case 0: 367126e216a8730532dfb685205309275f87e3d133eTrond Myklebust if (gss_msg->ctx == NULL) 368126e216a8730532dfb685205309275f87e3d133eTrond Myklebust break; 369126e216a8730532dfb685205309275f87e3d133eTrond Myklebust clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 370126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); 371126e216a8730532dfb685205309275f87e3d133eTrond Myklebust break; 372126e216a8730532dfb685205309275f87e3d133eTrond Myklebust case -EKEYEXPIRED: 373126e216a8730532dfb685205309275f87e3d133eTrond Myklebust set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); 374126e216a8730532dfb685205309275f87e3d133eTrond Myklebust } 375126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_cred->gc_upcall_timestamp = jiffies; 376126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_cred->gc_upcall = NULL; 377126e216a8730532dfb685205309275f87e3d133eTrond Myklebust rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); 378126e216a8730532dfb685205309275f87e3d133eTrond Myklebust} 379126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 380126e216a8730532dfb685205309275f87e3d133eTrond Myklebuststatic void 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_upcall_callback(struct rpc_task *task) 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 383a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; 3869beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe = gss_msg->pipe; 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3889beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 389126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 3909beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 391126e216a8730532dfb685205309275f87e3d133eTrond Myklebust task->tk_status = gss_msg->msg.errno; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39534769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) 39634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\{ 39790602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); 39890602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman memcpy(gss_msg->databuf, &uid, sizeof(uid)); 39990602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman gss_msg->msg.data = gss_msg->databuf; 40090602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman gss_msg->msg.len = sizeof(uid); 40190602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); 40234769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\} 40334769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 4048b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaiastatic void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, 40568c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust struct rpc_clnt *clnt, 40668c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust const char *service_name) 40734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\{ 408683ac6656cb05b6e83593770ffc049eee4a4d119Trond Myklebust struct gss_api_mech *mech = gss_msg->auth->mech; 4098b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia char *p = gss_msg->databuf; 4108b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia int len = 0; 4118b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia 4128b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", 413683ac6656cb05b6e83593770ffc049eee4a4d119Trond Myklebust mech->gm_name, 41490602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman from_kuid(&init_user_ns, gss_msg->uid)); 4158b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia p += gss_msg->msg.len; 4168b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia if (clnt->cl_principal) { 4178b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia len = sprintf(p, "target=%s ", clnt->cl_principal); 4188b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia p += len; 4198b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia gss_msg->msg.len += len; 4208b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia } 42168c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust if (service_name != NULL) { 42268c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust len = sprintf(p, "service=%s ", service_name); 4232efef7080f471d312a9c4feb3dc5ee038039c7edOlga Kornievskaia p += len; 4242efef7080f471d312a9c4feb3dc5ee038039c7edOlga Kornievskaia gss_msg->msg.len += len; 4252efef7080f471d312a9c4feb3dc5ee038039c7edOlga Kornievskaia } 426683ac6656cb05b6e83593770ffc049eee4a4d119Trond Myklebust if (mech->gm_upcall_enctypes) { 427f8628220bb395104697be9c447c1085846dfc97cKevin Coffman len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); 428683ac6656cb05b6e83593770ffc049eee4a4d119Trond Myklebust p += len; 429683ac6656cb05b6e83593770ffc049eee4a4d119Trond Myklebust gss_msg->msg.len += len; 430683ac6656cb05b6e83593770ffc049eee4a4d119Trond Myklebust } 4318b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia len = sprintf(p, "\n"); 4328b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia gss_msg->msg.len += len; 4338b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaia 43434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ gss_msg->msg.data = gss_msg->databuf; 43534769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); 43634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\} 43734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 4388b1c7bf5b624c9bc91b41ae577b9fc5c21641705Olga Kornievskaiastatic void gss_encode_msg(struct gss_upcall_msg *gss_msg, 43968c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust struct rpc_clnt *clnt, 44068c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust const char *service_name) 44134769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\{ 44234769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ if (pipe_version == 0) 44334769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ gss_encode_v0_msg(gss_msg); 44434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ else /* pipe_version == 1 */ 44568c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust gss_encode_v1_msg(gss_msg, clnt, service_name); 44634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\} 44734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 44868c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebuststatic struct gss_upcall_msg * 44968c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebustgss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt, 4507eaf040b720bc8c0ce5cd49151ca194ca2d56842Eric W. Biederman kuid_t uid, const char *service_name) 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 45379a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ int vers; 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4550f38b873aeaae698c3693748438547c8493165fbTrond Myklebust gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); 456db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ if (gss_msg == NULL) 457db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ return ERR_PTR(-ENOMEM); 45879a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ vers = get_pipe_version(); 45979a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ if (vers < 0) { 46079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ kfree(gss_msg); 46179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ return ERR_PTR(vers); 46279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ } 463c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky gss_msg->pipe = gss_auth->pipe[vers]; 464db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ INIT_LIST_HEAD(&gss_msg->list); 465db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); 466db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ init_waitqueue_head(&gss_msg->waitqueue); 467db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ atomic_set(&gss_msg->count, 1); 468db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ gss_msg->uid = uid; 469db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ gss_msg->auth = gss_auth; 47068c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust gss_encode_msg(gss_msg, clnt, service_name); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct gss_upcall_msg * 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4777c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust struct gss_cred *gss_cred = container_of(cred, 4787c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust struct gss_cred, gc_base); 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_new, *gss_msg; 4807eaf040b720bc8c0ce5cd49151ca194ca2d56842Eric W. Biederman kuid_t uid = cred->cr_uid; 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 48268c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust gss_new = gss_alloc_msg(gss_auth, clnt, uid, gss_cred->gc_principal); 483db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ if (IS_ERR(gss_new)) 484db75b3d6b5b0dad29860370618ea94d2726641b4\"J. Bruce Fields\ return gss_new; 485053e324f67b9921fe7de0c4cbc720d29cb4bf207Suresh Jayaraman gss_msg = gss_add_msg(gss_new); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg == gss_new) { 4879beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (res) { 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_new); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = ERR_PTR(res); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_new); 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gss_msg; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 497b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\static void warn_gssd(void) 498b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\{ 499b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ static unsigned long ratelimit; 500b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ unsigned long now = jiffies; 501b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ 502b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ if (time_after(now, ratelimit)) { 503b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" 504b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ "Please check user daemon is running.\n"); 505b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ ratelimit = now + 15*HZ; 506b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ } 507b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\} 508b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh_upcall(struct rpc_task *task) 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 512a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 5134a8c1344dccb848dbcf0edabc8b5c51a8ecf2808Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth, rpc_auth); 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred, gc_base); 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 5189beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe; 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s for uid %u\n", 522cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); 524480e3243df156e39eea6c91057e2ae612a6bbe19Roel Kluin if (PTR_ERR(gss_msg) == -EAGAIN) { 52579a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ /* XXX: warning on the first, under the assumption we 52679a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ * shouldn't normally hit this case on a refresh. */ 52779a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ warn_gssd(); 52879a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ task->tk_timeout = 15*HZ; 52979a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); 530d1a8016a2d1e75021ecc8715e3c81442d7218eb6Bryan Schumaker return -EAGAIN; 53179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ } 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5369beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky pipe = gss_msg->pipe; 5379beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_cred->gc_upcall != NULL) 5395d00837b90340af9106dcd93af75fd664c8eb87fTrond Myklebust rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); 540126e216a8730532dfb685205309275f87e3d133eTrond Myklebust else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds task->tk_timeout = 0; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_cred->gc_upcall = gss_msg; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* gss_upcall_callback will release the reference to gss_upcall_msg */ 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 5455d00837b90340af9106dcd93af75fd664c8eb87fTrond Myklebust rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); 546126e216a8730532dfb685205309275f87e3d133eTrond Myklebust } else { 547126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_handle_downcall_result(gss_cred, gss_msg); 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 549126e216a8730532dfb685205309275f87e3d133eTrond Myklebust } 5509beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 553632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s for uid %u result %d\n", 554cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman task->tk_pid, __func__, 555cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman from_kuid(&init_user_ns, cred->cr_uid), err); 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5629beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_cred *cred = &gss_cred->gc_base; 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DEFINE_WAIT(wait); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 568cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman dprintk("RPC: %s for uid %u\n", 569cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid)); 57079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\retry: 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); 57279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ if (PTR_ERR(gss_msg) == -EAGAIN) { 57379a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ err = wait_event_interruptible_timeout(pipe_version_waitqueue, 57479a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ pipe_version >= 0, 15*HZ); 575d1a8016a2d1e75021ecc8715e3c81442d7218eb6Bryan Schumaker if (pipe_version < 0) { 576d1a8016a2d1e75021ecc8715e3c81442d7218eb6Bryan Schumaker warn_gssd(); 577d1a8016a2d1e75021ecc8715e3c81442d7218eb6Bryan Schumaker err = -EACCES; 578d1a8016a2d1e75021ecc8715e3c81442d7218eb6Bryan Schumaker } 57979a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ if (err) 58079a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ goto out; 58179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ goto retry; 58279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ } 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(gss_msg)) { 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(gss_msg); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5879beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky pipe = gss_msg->pipe; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 5895afa9133cfe67f1bfead6049a9640c9262a7101cTrond Myklebust prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); 5909beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5949beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 5955afa9133cfe67f1bfead6049a9640c9262a7101cTrond Myklebust if (fatal_signal_pending(current)) { 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ERESTARTSYS; 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_intr; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gss_msg->ctx) 6027b6962b0a6000df48c8a5fd967d262f77704101bTrond Myklebust gss_cred_set_ctx(cred, gss_msg->ctx); 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_msg->msg.errno; 6059beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_intr: 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds finish_wait(&gss_msg->waitqueue, &wait); 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 610632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s for uid %u result %d\n", 611cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman __func__, from_kuid(&init_user_ns, cred->cr_uid), err); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MSG_BUF_MAXSIZE 1024 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const void *p, *end; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg; 623496ad9aa8ef448058e36ca7a787c61f2e63f0f54Al Viro struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx; 62590602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman uid_t id; 62690602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman kuid_t uid; 6273b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust ssize_t err = -EFBIG; 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mlen > MSG_BUF_MAXSIZE) 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 6320f38b873aeaae698c3693748438547c8493165fbTrond Myklebust buf = kmalloc(mlen, GFP_NOFS); 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf) 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -EFAULT; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(buf, src, mlen)) 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end = (const void *)((char *)buf + mlen); 64190602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman p = simple_get_bytes(buf, end, &id, sizeof(id)); 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 64790602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman uid = make_kuid(&init_user_ns, id); 64890602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman if (!uid_valid(uid)) { 64990602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman err = -EINVAL; 65090602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman goto err; 65190602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman } 65290602c7b192fdd3e6b7c7623479f4bc86ed7ee34Eric W. Biederman 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOMEM; 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctx = gss_alloc_context(); 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx == NULL) 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 6573b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 6583b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust err = -ENOENT; 6593b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust /* Find a matching upcall */ 6609beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 6619beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky gss_msg = __gss_find_upcall(pipe, uid); 6623b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust if (gss_msg == NULL) { 6639beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 6643b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust goto err_put_ctx; 6653b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust } 6663b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust list_del_init(&gss_msg->list); 6679beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 6683b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 6696e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) { 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(p); 672486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton switch (err) { 673486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton case -EACCES: 674dc5ddce956660247e004a4b20a26b7d137ab1644Jeff Layton case -EKEYEXPIRED: 675486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton gss_msg->msg.errno = err; 676486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton err = mlen; 677486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton break; 678486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton case -EFAULT: 679486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton case -ENOMEM: 680486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton case -EINVAL: 681486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton case -ENOSYS: 682486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton gss_msg->msg.errno = -EAGAIN; 683486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton break; 684486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton default: 685486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton printk(KERN_CRIT "%s: bad return from " 6866c8530993e1fdf1d6af0403e796fe14d80b4b097Randy Dunlap "gss_fill_context: %zd\n", __func__, err); 687486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton BUG(); 688486bad2e40e938cd68fd853b7a9fa3115a9d3a4aJeff Layton } 6893b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust goto err_release_msg; 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6913b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_msg->ctx = gss_get_ctx(ctx); 6923b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust err = mlen; 6933b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust 6943b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebusterr_release_msg: 6959beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 6963b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust __gss_unhash_msg(gss_msg); 6979beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 6983b68aaeaf54065e5c44583a1d33ffb7793953ba4Trond Myklebust gss_release_msg(gss_msg); 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_ctx: 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 704632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s returning %Zd\n", __func__, err); 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 70834769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\static int gss_pipe_open(struct inode *inode, int new_version) 709cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\{ 71034769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ int ret = 0; 71134769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 71279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ spin_lock(&pipe_version_lock); 71379a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ if (pipe_version < 0) { 71434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ /* First open of any gss pipe determines the version: */ 71534769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ pipe_version = new_version; 71679a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ rpc_wake_up(&pipe_version_rpc_waitqueue); 71779a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ wake_up(&pipe_version_waitqueue); 71834769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ } else if (pipe_version != new_version) { 71934769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ /* Trying to open a pipe of a different version */ 72034769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ ret = -EBUSY; 72134769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ goto out; 72279a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ } 723cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\ atomic_inc(&pipe_users); 72434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\out: 72579a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ spin_unlock(&pipe_version_lock); 72634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ return ret; 72734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 72834769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\} 72934769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 73034769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\static int gss_pipe_open_v0(struct inode *inode) 73134769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\{ 73234769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ return gss_pipe_open(inode, 0); 73334769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\} 73434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 73534769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\static int gss_pipe_open_v1(struct inode *inode) 73634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\{ 73734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ return gss_pipe_open(inode, 1); 738cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\} 739cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\ 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_release(struct inode *inode) 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7439beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky struct rpc_pipe *pipe = RPC_I(inode)->pipe; 7446e84c7b66a0aa0be16a7728d1e687c57978dac2cTrond Myklebust struct gss_upcall_msg *gss_msg; 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7465a67657a2e90c9e4a48518f95d4ba7777aa20fbbTrond Myklebustrestart: 7479beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_lock(&pipe->lock); 7489beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky list_for_each_entry(gss_msg, &pipe->in_downcall, list) { 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7505a67657a2e90c9e4a48518f95d4ba7777aa20fbbTrond Myklebust if (!list_empty(&gss_msg->msg.list)) 7515a67657a2e90c9e4a48518f95d4ba7777aa20fbbTrond Myklebust continue; 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_msg->msg.errno = -EPIPE; 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __gss_unhash_msg(gss_msg); 7559beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 7575a67657a2e90c9e4a48518f95d4ba7777aa20fbbTrond Myklebust goto restart; 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7599beae4677de76cfa4ce8899dc8cd1a1cf8cd8332Stanislav Kinsbursky spin_unlock(&pipe->lock); 760cf81939d6fcdf381fcb069d780c29eceb516bccd\"J. Bruce Fields\ 76179a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ put_pipe_version(); 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_pipe_destroy_msg(struct rpc_pipe_msg *msg) 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msg->errno < 0) { 770632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s releasing msg %p\n", 771632f0d0503accb8ab749a1165af99d344579c37bChuck Lever __func__, gss_msg); 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc(&gss_msg->count); 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_unhash_msg(gss_msg); 774b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ if (msg->errno == -ETIMEDOUT) 775b03568c32226163cb3588ea8993adb268ed497a5\"J. Bruce Fields\ warn_gssd(); 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_release_msg(gss_msg); 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 780ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsburskystatic void gss_pipes_dentries_destroy(struct rpc_auth *auth) 781ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky{ 782ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct gss_auth *gss_auth; 783ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 784ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 78580df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky if (gss_auth->pipe[0]->dentry) 78680df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky rpc_unlink(gss_auth->pipe[0]->dentry); 78780df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky if (gss_auth->pipe[1]->dentry) 78880df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 789ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky} 790ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 791ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsburskystatic int gss_pipes_dentries_create(struct rpc_auth *auth) 792ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky{ 793ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky int err; 794ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct gss_auth *gss_auth; 795ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct rpc_clnt *clnt; 796ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 797ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky gss_auth = container_of(auth, struct gss_auth, rpc_auth); 798ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky clnt = gss_auth->client; 799ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 80030507f58ce11e7664512059c708347d7a7d75271Stanislav Kinsbursky gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 801ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky "gssd", 802ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky clnt, gss_auth->pipe[1]); 803ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1]->dentry)) 804ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky return PTR_ERR(gss_auth->pipe[1]->dentry); 80530507f58ce11e7664512059c708347d7a7d75271Stanislav Kinsbursky gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_dentry, 806ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky gss_auth->mech->gm_name, 807ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky clnt, gss_auth->pipe[0]); 808ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0]->dentry)) { 809ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]->dentry); 810ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky goto err_unlink_pipe_1; 811ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky } 812ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky return 0; 813ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 814ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsburskyerr_unlink_pipe_1: 815ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky rpc_unlink(gss_auth->pipe[1]->dentry); 816ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky return err; 817ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky} 818ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 819ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsburskystatic void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt, 820ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct rpc_auth *auth) 821ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky{ 8222446ab6070861aba2dd9229463ffbc40016a9f33Trond Myklebust struct net *net = rpc_net_ns(clnt); 823ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct super_block *sb; 824ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 825ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky sb = rpc_get_sb_net(net); 826ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky if (sb) { 82730507f58ce11e7664512059c708347d7a7d75271Stanislav Kinsbursky if (clnt->cl_dentry) 828ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky gss_pipes_dentries_destroy(auth); 829ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky rpc_put_sb_net(net); 830ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky } 831ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky} 832ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 833ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsburskystatic int gss_pipes_dentries_create_net(struct rpc_clnt *clnt, 834ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct rpc_auth *auth) 835ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky{ 8362446ab6070861aba2dd9229463ffbc40016a9f33Trond Myklebust struct net *net = rpc_net_ns(clnt); 837ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky struct super_block *sb; 838ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky int err = 0; 839ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 840ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky sb = rpc_get_sb_net(net); 841ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky if (sb) { 84230507f58ce11e7664512059c708347d7a7d75271Stanislav Kinsbursky if (clnt->cl_dentry) 843ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky err = gss_pipes_dentries_create(auth); 844ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky rpc_put_sb_net(net); 845ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky } 846ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky return err; 847ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky} 848ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky 849cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki/* 850cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki * NOTE: we have the opportunity to use different 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parameters based on the input flavor (which must be a pseudoflavor) 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_auth * 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rpc_auth * auth; 8586a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields int err = -ENOMEM; /* XXX? */ 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8608885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: creating GSS authenticator for client %p\n", clnt); 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!try_module_get(THIS_MODULE)) 8636a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_dec; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->client = clnt; 8676a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields err = -EINVAL; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!gss_auth->mech) { 8703392c34922130d1dca9ad436c358330daa85e94eJames Morris printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n", 8710dc47877a3de00ceadea0005189656ae8dc52669Harvey Harrison __func__, flavor); 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_free; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); 875438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields if (gss_auth->service == 0) 876438b6fdebf2a2e8573e7290bc176feb4d4475f43J. Bruce Fields goto err_put_mech; 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth = &gss_auth->rpc_auth; 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_cslack = GSS_CRED_SLACK >> 2; 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_rslack = GSS_VERF_SLACK >> 2; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_ops = &authgss_ops; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds auth->au_flavor = flavor; 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_set(&auth->au_count, 1); 8830285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_init(&gss_auth->kref); 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 88534769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ /* 88634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * Note: if we created the old pipe first, then someone who 88734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * examined the directory at the right moment might conclude 88834769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * that we supported only the old pipe. So we instead create 88934769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ * the new pipe first. 89034769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ */ 891c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky gss_auth->pipe[1] = rpc_mkpipe_data(&gss_upcall_ops_v1, 892c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky RPC_PIPE_WAIT_FOR_OPEN); 893c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky if (IS_ERR(gss_auth->pipe[1])) { 894c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[1]); 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_put_mech; 8966a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields } 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 898c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky gss_auth->pipe[0] = rpc_mkpipe_data(&gss_upcall_ops_v0, 899c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky RPC_PIPE_WAIT_FOR_OPEN); 900c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky if (IS_ERR(gss_auth->pipe[0])) { 901c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky err = PTR_ERR(gss_auth->pipe[0]); 902c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky goto err_destroy_pipe_1; 903c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky } 904ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky err = gss_pipes_dentries_create_net(clnt, auth); 905ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky if (err) 906c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky goto err_destroy_pipe_0; 907f5c2187cfef628784d8a09b6d0f77888246d0c0fTrond Myklebust err = rpcauth_init_credcache(auth); 90807a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust if (err) 909ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky goto err_unlink_pipes; 91007a2bf1da4765d987ffd1d8045e92ba032e0ad78Trond Myklebust 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return auth; 912ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsburskyerr_unlink_pipes: 913ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky gss_pipes_dentries_destroy_net(clnt, auth); 914c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsburskyerr_destroy_pipe_0: 915c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 916c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsburskyerr_destroy_pipe_1: 917c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_put_mech: 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_mech_put(gss_auth->mech); 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_free: 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(gss_auth); 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_dec: 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds module_put(THIS_MODULE); 9246a19275ada9137435da58990c8f8d3f58e170bf1J. Bruce Fields return ERR_PTR(err); 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9280285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebustgss_free(struct gss_auth *gss_auth) 9290285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust{ 930ccdc28f81c91f7ef2dc6c28d27f50264b19e4dd5Stanislav Kinsbursky gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth); 931c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[0]); 932c239d83b9921b8a8005a3bcd23000cfe18acf5c2Stanislav Kinsbursky rpc_destroy_pipe_data(gss_auth->pipe[1]); 9330285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_mech_put(gss_auth->mech); 9340285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 9350285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kfree(gss_auth); 9360285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust module_put(THIS_MODULE); 9370285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust} 9380285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 9390285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebuststatic void 9400285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebustgss_free_callback(struct kref *kref) 9410285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust{ 9420285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); 9430285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 9440285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust gss_free(gss_auth); 9450285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust} 9460285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust 9470285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebuststatic void 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_destroy(struct rpc_auth *auth) 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth; 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9528885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever dprintk("RPC: destroying GSS authenticator %p flavor %d\n", 9538885cb367f86ce02bed3bf18192d74a53ac3b81fChuck Lever auth, auth->au_flavor); 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9553ab9bb7243489f9db3abf3d05521ddfc6b184c0aTrond Myklebust rpcauth_destroy_credcache(auth); 9563ab9bb7243489f9db3abf3d05521ddfc6b184c0aTrond Myklebust 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_auth = container_of(auth, struct gss_auth, rpc_auth); 9580285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9610df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* 9620df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call 9630df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * to the server with the GSS control procedure field set to 9640df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * RPC_GSS_PROC_DESTROY. This should normally cause the server to release 9650df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * all RPCSEC_GSS state associated with that context. 9660df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust */ 9670df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic int 9680df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebustgss_destroying_context(struct rpc_cred *cred) 9690df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust{ 9700df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 9710df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 9720df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust struct rpc_task *task; 9730df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 9740df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (gss_cred->gc_ctx == NULL || 9756dcd3926b214a1fb081df18305921dedae269977Jeff Layton test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) 9760df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return 0; 9770df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 9780df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; 9790df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust cred->cr_ops = &gss_nullops; 9800df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 9810df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust /* Take a reference to ensure the cred will be destroyed either 9820df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust * by the RPC call or by the put_rpccred() below */ 9830df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust get_rpccred(cred); 9840df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 985080a1f148df0615f7a610e4776dd8f3fb706f54fTrond Myklebust task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); 9860df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (!IS_ERR(task)) 9870df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust rpc_put_task(task); 9880df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 9890df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust put_rpccred(cred); 9900df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return 1; 9910df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust} 9920df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 9930df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to create a new cred or context, so they check that things have been 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allocated before freeing them. */ 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9975d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_do_free_ctx(struct gss_cl_ctx *ctx) 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 999632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s\n", __func__); 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10010d8a374673c9bc62bc78a2d8fe64553a51542cb4Trond Myklebust gss_delete_sec_context(&ctx->gc_gss_ctx); 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx->gc_wire_ctx.data); 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ctx); 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 10075d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_free_ctx_callback(struct rcu_head *head) 10085d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust{ 10095d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); 10105d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_do_free_ctx(ctx); 10115d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust} 10125d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 10135d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void 10145d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebustgss_free_ctx(struct gss_cl_ctx *ctx) 10155d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust{ 10165d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); 10175d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust} 10185d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 10195d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebuststatic void 102031be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_free_cred(struct gss_cred *gss_cred) 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1022632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s cred=%p\n", __func__, gss_cred); 102331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust kfree(gss_cred); 102431be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust} 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 102631be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebuststatic void 102731be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebustgss_free_cred_callback(struct rcu_head *head) 102831be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust{ 102931be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); 103031be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust gss_free_cred(gss_cred); 103131be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust} 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 103331be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebuststatic void 10346dcd3926b214a1fb081df18305921dedae269977Jeff Laytongss_destroy_nullcred(struct rpc_cred *cred) 103531be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust{ 10365d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); 10370285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); 10385d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust struct gss_cl_ctx *ctx = gss_cred->gc_ctx; 10395d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust 1040a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); 104131be5bf15f3dafffce110eb1afadccbf2e3067b4Trond Myklebust call_rcu(&cred->cr_rcu, gss_free_cred_callback); 10425d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust if (ctx) 10435d28dc82074f1e64b22c9424b161abc1f5d6bcdbTrond Myklebust gss_put_ctx(ctx); 10440285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_put(&gss_auth->kref, gss_free_callback); 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10476dcd3926b214a1fb081df18305921dedae269977Jeff Laytonstatic void 10486dcd3926b214a1fb081df18305921dedae269977Jeff Laytongss_destroy_cred(struct rpc_cred *cred) 10496dcd3926b214a1fb081df18305921dedae269977Jeff Layton{ 10506dcd3926b214a1fb081df18305921dedae269977Jeff Layton 10516dcd3926b214a1fb081df18305921dedae269977Jeff Layton if (gss_destroying_context(cred)) 10526dcd3926b214a1fb081df18305921dedae269977Jeff Layton return; 10536dcd3926b214a1fb081df18305921dedae269977Jeff Layton gss_destroy_nullcred(cred); 10546dcd3926b214a1fb081df18305921dedae269977Jeff Layton} 10556dcd3926b214a1fb081df18305921dedae269977Jeff Layton 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Lookup RPCSEC_GSS cred for the current process 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 10608a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10628a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust return rpcauth_lookup_credcache(auth, acred, flags); 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct rpc_cred * 10668a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *cred = NULL; 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = -ENOMEM; 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1072632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s for uid %d, flavor %d\n", 1073cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman __func__, from_kuid(&init_user_ns, acred->uid), 1074cdba321e291f0fbf5abda4d88340292b858e3d4dEric W. Biederman auth->au_flavor); 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10760f38b873aeaae698c3693748438547c8493165fbTrond Myklebust if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_err; 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10795fe4755e2526a2aa82b7ed8daeb3aed74a236925Trond Myklebust rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: in order to force a call to call_refresh(), we deliberately 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fail to flag the credential as RPCAUTH_CRED_UPTODATE. 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1084fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred->gc_service = gss_auth->service; 108668c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust cred->gc_principal = NULL; 108768c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust if (acred->machine_cred) 108868c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust cred->gc_principal = acred->principal; 10890285ed1f12298e5304f0f2642e2cf31a5f302e61Trond Myklebust kref_get(&gss_auth->kref); 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cred->gc_base; 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_err: 1093632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %s failed with error %d\n", __func__, err); 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(err); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1098fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebustgss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) 1099fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust{ 1100fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); 1101fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); 1102fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust int err; 1103fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 1104fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust do { 1105fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust err = gss_create_upcall(gss_auth, gss_cred); 1106fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust } while (err == -EAGAIN); 1107fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust return err; 1108fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust} 1109fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust 1110fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebuststatic int 11118a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustgss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1115cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) 11168a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebust goto out; 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Don't match with creds that have expired. */ 1118cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) 1119cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return 0; 1120cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11228a3177604b729ec3b80e43790ee978863ac7551bTrond Myklebustout: 112368c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust if (acred->principal != NULL) { 112468c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust if (gss_cred->gc_principal == NULL) 112568c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust return 0; 112668c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust return strcmp(acred->principal, gss_cred->gc_principal) == 0; 112768c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust } 112868c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust if (gss_cred->gc_principal != NULL) 11297c67db3a8a98045744f06fcd6d8f476d9df0ba5cTrond Myklebust return 0; 11300b4d51b02a2e941beec6f02a6c7a32c5a28c5b43Eric W. Biederman return uid_eq(rc->cr_uid, acred->uid); 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Marshal credentials. 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Maybe we should keep a cached credential for performance reasons. 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 1137d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 1138d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_marshal(struct rpc_task *task, __be32 *p) 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1140a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_rqst *req = task->tk_rqstp; 1141a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *cred = req->rq_cred; 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1145d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *cred_len; 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cred_len = p++; 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&ctx->gc_seq_lock); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_seqno = ctx->gc_seq++; 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&ctx->gc_seq_lock); 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) RPC_GSS_VERSION); 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) ctx->gc_proc); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) req->rq_seqno); 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl((u32) gss_cred->gc_service); 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *cred_len = htonl((p - (cred_len + 1)) << 2); 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We compute the checksum for the verifier over the xdr-encoded bytes 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * starting with the xid and ending at the end of the credential: */ 1169a4f0835c604f80f945ab3e72ffd00547145c4b2bTrond Myklebust iov.iov_base = xprt_skip_transport_header(req->rq_xprt, 1170808012fbb23a52ec59352445d2076d175ad4ab26Chuck Lever req->rq_snd_buf.head[0].iov_base); 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set verifier flavor*/ 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(RPC_AUTH_GSS); 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 117800fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) { 1180fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (maj_stat != 0) { 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_put_ctx; 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = xdr_encode_opaque(p, NULL, mic.len); 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_put_ctx: 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1193cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebuststatic int gss_renew_cred(struct rpc_task *task) 1194cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust{ 1195a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; 1196cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct gss_cred *gss_cred = container_of(oldcred, 1197cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct gss_cred, 1198cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust gc_base); 1199cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct rpc_auth *auth = oldcred->cr_auth; 1200cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct auth_cred acred = { 1201cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust .uid = oldcred->cr_uid, 120268c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust .principal = gss_cred->gc_principal, 120368c97153fb7f2877f98aa6c29546381d9cad2fedTrond Myklebust .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), 1204cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust }; 1205cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust struct rpc_cred *new; 1206cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust 1207cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); 1208cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (IS_ERR(new)) 1209cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return PTR_ERR(new); 1210a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust task->tk_rqstp->rq_cred = new; 1211cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust put_rpccred(oldcred); 1212cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return 0; 1213cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust} 1214cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust 1215126e216a8730532dfb685205309275f87e3d133eTrond Myklebuststatic int gss_cred_is_negative_entry(struct rpc_cred *cred) 1216126e216a8730532dfb685205309275f87e3d133eTrond Myklebust{ 1217126e216a8730532dfb685205309275f87e3d133eTrond Myklebust if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { 1218126e216a8730532dfb685205309275f87e3d133eTrond Myklebust unsigned long now = jiffies; 1219126e216a8730532dfb685205309275f87e3d133eTrond Myklebust unsigned long begin, expire; 1220126e216a8730532dfb685205309275f87e3d133eTrond Myklebust struct gss_cred *gss_cred; 1221126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 1222126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_cred = container_of(cred, struct gss_cred, gc_base); 1223126e216a8730532dfb685205309275f87e3d133eTrond Myklebust begin = gss_cred->gc_upcall_timestamp; 1224126e216a8730532dfb685205309275f87e3d133eTrond Myklebust expire = begin + gss_expired_cred_retry_delay * HZ; 1225126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 1226126e216a8730532dfb685205309275f87e3d133eTrond Myklebust if (time_in_range_open(now, begin, expire)) 1227126e216a8730532dfb685205309275f87e3d133eTrond Myklebust return 1; 1228126e216a8730532dfb685205309275f87e3d133eTrond Myklebust } 1229126e216a8730532dfb685205309275f87e3d133eTrond Myklebust return 0; 1230126e216a8730532dfb685205309275f87e3d133eTrond Myklebust} 1231126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds* Refresh credentials. XXX - finish 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_refresh(struct rpc_task *task) 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1238a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 1239cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust int ret = 0; 1240cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust 1241126e216a8730532dfb685205309275f87e3d133eTrond Myklebust if (gss_cred_is_negative_entry(cred)) 1242126e216a8730532dfb685205309275f87e3d133eTrond Myklebust return -EKEYEXPIRED; 1243126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 1244cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && 1245cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { 1246cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust ret = gss_renew_cred(task); 1247cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (ret < 0) 1248cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust goto out; 1249a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust cred = task->tk_rqstp->rq_cred; 1250cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust } 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1252cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) 1253cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust ret = gss_refresh_upcall(task); 1254cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebustout: 1255cd019f7517206a74d8cdb64d5c82b1f76be608ccTrond Myklebust return ret; 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12580df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust/* Dummy refresh routine: used only when destroying the context */ 12590df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic int 12600df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebustgss_refresh_null(struct rpc_task *task) 12610df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust{ 12620df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust return -EACCES; 12630df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust} 12640df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 1265d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyanstatic __be32 * 1266d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyangss_validate(struct rpc_task *task, __be32 *p) 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1268a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1270d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 seq; 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec iov; 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf verf_buf; 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 flav,len; 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1277632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flav = ntohl(*p++); 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) 1281cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki goto out_bad; 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flav != RPC_AUTH_GSS) 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds seq = htonl(task->tk_rqstp->rq_seqno); 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_base = &seq; 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov.iov_len = sizeof(seq); 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xdr_buf_from_iov(&iov, &verf_buf); 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)p; 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.len = len; 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 129100fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1293fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 12940df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust if (maj_stat) { 1295632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", 1296632f0d0503accb8ab749a1165af99d344579c37bChuck Lever task->tk_pid, __func__, maj_stat); 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_bad; 12980df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust } 129924b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* We leave it to unwrap to calculate au_rslack. For now we just 130024b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields * calculate the length of the verifier: */ 13011be27f36601973815171db684c711d30557cf50cTrond Myklebust cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 1303632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", 1304632f0d0503accb8ab749a1165af99d344579c37bChuck Lever task->tk_pid, __func__); 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p + XDR_QUADLEN(len); 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_bad: 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 1308632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13129f06c719f474be7003763284a990bed6377bb0d4Chuck Leverstatic void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, 13139f06c719f474be7003763284a990bed6377bb0d4Chuck Lever __be32 *p, void *obj) 13149f06c719f474be7003763284a990bed6377bb0d4Chuck Lever{ 13159f06c719f474be7003763284a990bed6377bb0d4Chuck Lever struct xdr_stream xdr; 13169f06c719f474be7003763284a990bed6377bb0d4Chuck Lever 13179f06c719f474be7003763284a990bed6377bb0d4Chuck Lever xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); 13189f06c719f474be7003763284a990bed6377bb0d4Chuck Lever encode(rqstp, &xdr, obj); 13199f06c719f474be7003763284a990bed6377bb0d4Chuck Lever} 13209f06c719f474be7003763284a990bed6377bb0d4Chuck Lever 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 13239f06c719f474be7003763284a990bed6377bb0d4Chuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 13249f06c719f474be7003763284a990bed6377bb0d4Chuck Lever __be32 *p, void *obj) 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 1328d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *integ_len = NULL; 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 1330d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan u32 offset; 1331d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *q; 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kvec *iov; 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat = 0; 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = p++; 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *p++ = htonl(rqstp->rq_seqno); 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13409f06c719f474be7003763284a990bed6377bb0d4Chuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(snd_buf, &integ_buf, 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset, snd_buf->len - offset)) 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *integ_len = htonl(integ_buf.len); 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* guess whether we're in the head or the tail: */ 1348cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki if (snd_buf->page_len || snd_buf->tail[0].iov_len) 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->tail; 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov = snd_buf->head; 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = iov->iov_base + iov->iov_len; 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic.data = (u8 *)(p + 1); 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 135500fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EIO; /* XXX? */ 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1358fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (maj_stat) 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q = xdr_encode_opaque(p, NULL, mic.len); 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset = (u8 *)q - (u8 *)p; 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iov->iov_len += offset; 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snd_buf->len += offset; 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic void 13702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldspriv_release_snd_buf(struct rpc_rqst *rqstp) 13712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 13722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int i; 13732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 13742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) 13752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields __free_page(rqstp->rq_enc_pages[i]); 13762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields kfree(rqstp->rq_enc_pages); 13772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 13782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 13792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic int 13802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsalloc_enc_pages(struct rpc_rqst *rqstp) 13812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 13822d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 13832d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first, last, i; 13842d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 13852d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len == 0) { 13862d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = 0; 13872d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 13882d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 13892d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 13902d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 13912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; 13922d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages_num = last - first + 1 + 1; 13932d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages 13942d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), 13952d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields GFP_NOFS); 13962d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (!rqstp->rq_enc_pages) 13972d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out; 13982d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields for (i=0; i < rqstp->rq_enc_pages_num; i++) { 13992d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); 14002d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (rqstp->rq_enc_pages[i] == NULL) 14012d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields goto out_free; 14022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 14032d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rqstp->rq_release_snd_buf = priv_release_snd_buf; 14042d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 14052d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout_free: 1406cdead7cf12896c0e50a8be2e52de52c364603095Trond Myklebust rqstp->rq_enc_pages_num = i; 1407cdead7cf12896c0e50a8be2e52de52c364603095Trond Myklebust priv_release_snd_buf(rqstp); 14082d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsout: 14092d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return -EAGAIN; 14102d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 14112d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14122d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 14132d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 14149f06c719f474be7003763284a990bed6377bb0d4Chuck Lever kxdreproc_t encode, struct rpc_rqst *rqstp, 14159f06c719f474be7003763284a990bed6377bb0d4Chuck Lever __be32 *p, void *obj) 14162d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 14172d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; 14182d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 14192d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 14202d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status; 1421d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *opaque_len; 14222d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct page **inpages; 14232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int first; 14242d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int pad; 14252d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *iov; 14262d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields char *tmp; 14272d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14282d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = p++; 14292d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; 14302d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *p++ = htonl(rqstp->rq_seqno); 14312d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14329f06c719f474be7003763284a990bed6377bb0d4Chuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14332d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14342d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields status = alloc_enc_pages(rqstp); 14352d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (status) 14362d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 14372d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields first = snd_buf->page_base >> PAGE_CACHE_SHIFT; 14382d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields inpages = snd_buf->pages + first; 14392d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->pages = rqstp->rq_enc_pages; 14402d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->page_base -= first << PAGE_CACHE_SHIFT; 14417561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman /* 14427561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman * Give the tail its own page, in case we need extra space in the 14437561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman * head when wrapping: 14447561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman * 14457561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman * call_allocate() allocates twice the slack space required 14467561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman * by the authentication flavor to rq_callsize. 14477561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman * For GSS, slack is GSS_CRED_SLACK. 14487561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman */ 14492d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) { 14502d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); 14512d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); 14522d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->tail[0].iov_base = tmp; 14532d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields } 145400fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); 14557561042fb7870be0b4ee57efddce68bda8968abfKevin Coffman /* slack space should prevent this ever happening: */ 14562d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields BUG_ON(snd_buf->len > snd_buf->buflen); 1457cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki status = -EIO; 14582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was 14592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields * done anyway, so it's safe to put the request on the wire: */ 14602d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1461fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 14622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else if (maj_stat) 14632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 14642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields *opaque_len = htonl(snd_buf->len - offset); 14662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* guess whether we're in the head or the tail: */ 14672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (snd_buf->page_len || snd_buf->tail[0].iov_len) 14682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->tail; 14692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields else 14702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov = snd_buf->head; 14712d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields p = iov->iov_base + iov->iov_len; 14722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields pad = 3 - ((snd_buf->len - offset - 1) & 3); 14732d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields memset(p, 0, pad); 14742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields iov->iov_len += pad; 14752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields snd_buf->len += pad; 14762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 14782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 14792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_wrap_req(struct rpc_task *task, 14829f06c719f474be7003763284a990bed6377bb0d4Chuck Lever kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1484a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1490632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s\n", task->tk_pid, __func__); 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) { 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The spec seems a little ambiguous here, but I think that not 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wrapping context destruction requests makes the most sense. 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14959f06c719f474be7003763284a990bed6377bb0d4Chuck Lever gss_wrap_req_encode(encode, rqstp, p, obj); 14969f06c719f474be7003763284a990bed6377bb0d4Chuck Lever status = 0; 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 150089f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches case RPC_GSS_SVC_NONE: 150189f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches gss_wrap_req_encode(encode, rqstp, p, obj); 150289f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches status = 0; 150389f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches break; 150489f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches case RPC_GSS_SVC_INTEGRITY: 150589f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); 150689f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches break; 150789f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches case RPC_GSS_SVC_PRIVACY: 150889f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); 150989f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches break; 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 1513632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1519d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_buf integ_buf; 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xdr_netobj mic; 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_offset, mic_offset; 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 integ_len; 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 maj_stat; 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds integ_len = ntohl(*(*p)++); 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (integ_len & 3) 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset = integ_len + data_offset; 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mic_offset > rcv_buf->len) 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ntohl(*(*p)++) != rqstp->rq_seqno) 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mic_offset - data_offset)) 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 154600fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1548fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maj_stat != GSS_S_COMPLETE) 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15542d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsstatic inline int 15552d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fieldsgss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, 1556d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan struct rpc_rqst *rqstp, __be32 **p) 15572d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields{ 15582d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; 15592d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 offset; 15602d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 opaque_len; 15612d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields u32 maj_stat; 15622d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int status = -EIO; 15632d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 15642d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields opaque_len = ntohl(*(*p)++); 15652d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; 15662d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (offset + opaque_len > rcv_buf->len) 15672d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 15682d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields /* remove padding: */ 15692d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields rcv_buf->len = offset + opaque_len; 15702d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 157100fd6e14255fe7a249315746386d640bc4e9e758J. Bruce Fields maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); 15722d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat == GSS_S_CONTEXT_EXPIRED) 1573fc432dd90760a629c57026e57f65ff80a1a31d2fTrond Myklebust clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); 15742d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (maj_stat != GSS_S_COMPLETE) 15752d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 15762d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields if (ntohl(*(*p)++) != rqstp->rq_seqno) 15772d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return status; 15782d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 15792d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields return 0; 15802d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields} 15812d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 1582bf2695516db982e90a22fc94f93491b481796bb1Chuck Leverstatic int 1583bf2695516db982e90a22fc94f93491b481796bb1Chuck Levergss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, 1584bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever __be32 *p, void *obj) 1585bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever{ 1586bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever struct xdr_stream xdr; 1587bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever 1588bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 1589bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever return decode(rqstp, &xdr, obj); 1590bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever} 15912d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsgss_unwrap_resp(struct rpc_task *task, 1594bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1596a17c2153d2e271b0cbacae9bed83b0eaa41db7e1Trond Myklebust struct rpc_cred *cred = task->tk_rqstp->rq_cred; 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cred *gss_cred = container_of(cred, struct gss_cred, 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gc_base); 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); 1600d8ed029d6000ba2e2908d9286409e4833c091b4cAlexey Dobriyan __be32 *savedp = p; 16012d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; 16022d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields int savedlen = head->iov_len; 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EIO; 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctx->gc_proc != RPC_GSS_PROC_DATA) 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_decode; 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (gss_cred->gc_service) { 160889f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches case RPC_GSS_SVC_NONE: 160989f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches break; 161089f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches case RPC_GSS_SVC_INTEGRITY: 161189f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); 161289f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches if (status) 161389f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches goto out; 161489f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches break; 161589f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches case RPC_GSS_SVC_PRIVACY: 161689f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); 161789f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches if (status) 161889f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches goto out; 161989f0e4feafb64643b0f0aba9d89984362bac9739Joe Perches break; 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 162124b2605becc10ca63c4c30808fa59a8abbf68727J. Bruce Fields /* take into account extra slack for integrity and privacy cases: */ 16221be27f36601973815171db684c711d30557cf50cTrond Myklebust cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) 16232d2da60c63b67174add32f06e8d54c3a0c5cd9cfJ. Bruce Fields + (savedlen - head->iov_len); 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_decode: 1625bf2695516db982e90a22fc94f93491b481796bb1Chuck Lever status = gss_unwrap_req_decode(decode, rqstp, p, obj); 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_put_ctx(ctx); 1628632f0d0503accb8ab749a1165af99d344579c37bChuck Lever dprintk("RPC: %5u %s returning %d\n", 1629632f0d0503accb8ab749a1165af99d344579c37bChuck Lever task->tk_pid, __func__, status); 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1632cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793YOSHIFUJI Hideaki 1633f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_authops authgss_ops = { 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_flavor = RPC_AUTH_GSS, 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .au_name = "RPCSEC_GSS", 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .create = gss_create, 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = gss_destroy, 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .lookup_cred = gss_lookup_cred, 164080df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky .crcreate = gss_create_cred, 164180df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky .pipes_create = gss_pipes_dentries_create, 164280df9d202255071c8ec610a6a3fdca5cac69f7bdStanislav Kinsbursky .pipes_destroy = gss_pipes_dentries_destroy, 16436a1a1e34dc55f17e7bd260809207442dbb7a0296Chuck Lever .list_pseudoflavors = gss_mech_list_pseudoflavors, 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1646f1c0a8615090359d57e096157feb9f900cbb233cTrond Myklebuststatic const struct rpc_credops gss_credops = { 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cr_name = "AUTH_GSS", 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crdestroy = gss_destroy_cred, 1649fba3bad488a2eec2d76c067edb7a5ff92ef42431Trond Myklebust .cr_init = gss_cred_init, 16505c691044ecbca04dd558fca4c754121689fe1b34Trond Myklebust .crbind = rpcauth_generic_bind_cred, 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmatch = gss_match, 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crmarshal = gss_marshal, 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crrefresh = gss_refresh, 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crvalidate = gss_validate, 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crwrap_req = gss_wrap_req, 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .crunwrap_resp = gss_unwrap_resp, 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16590df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebuststatic const struct rpc_credops gss_nullops = { 16600df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .cr_name = "AUTH_GSS", 16616dcd3926b214a1fb081df18305921dedae269977Jeff Layton .crdestroy = gss_destroy_nullcred, 16625c691044ecbca04dd558fca4c754121689fe1b34Trond Myklebust .crbind = rpcauth_generic_bind_cred, 16630df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crmatch = gss_match, 16640df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crmarshal = gss_marshal, 16650df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crrefresh = gss_refresh_null, 16660df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crvalidate = gss_validate, 16670df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crwrap_req = gss_wrap_req, 16680df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust .crunwrap_resp = gss_unwrap_resp, 16690df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust}; 16700df7fb74fbb709591301871a38aac7735a1d6583Trond Myklebust 1671b693ba4a338da15db1db4b5ebaa36e4ab9781c82Trond Myklebuststatic const struct rpc_pipe_ops gss_upcall_ops_v0 = { 1672c1225158a8dad9e9d5eee8a17dbbd9c7cda05ab9Peng Tao .upcall = rpc_pipe_generic_upcall, 167334769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ .downcall = gss_pipe_downcall, 167434769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ .destroy_msg = gss_pipe_destroy_msg, 167534769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v0, 167634769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ .release_pipe = gss_pipe_release, 167734769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\}; 167834769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ 1679b693ba4a338da15db1db4b5ebaa36e4ab9781c82Trond Myklebuststatic const struct rpc_pipe_ops gss_upcall_ops_v1 = { 1680c1225158a8dad9e9d5eee8a17dbbd9c7cda05ab9Peng Tao .upcall = rpc_pipe_generic_upcall, 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .downcall = gss_pipe_downcall, 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy_msg = gss_pipe_destroy_msg, 168334769fc488b463cb753fc632f8f5ba56c918b7cb\"J. Bruce Fields\ .open_pipe = gss_pipe_open_v1, 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release_pipe = gss_pipe_release, 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1687a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsburskystatic __net_init int rpcsec_gss_init_net(struct net *net) 1688a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky{ 1689a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky return gss_svc_init_net(net); 1690a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky} 1691a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky 1692a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsburskystatic __net_exit void rpcsec_gss_exit_net(struct net *net) 1693a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky{ 1694a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky gss_svc_shutdown_net(net); 1695a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky} 1696a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky 1697a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsburskystatic struct pernet_operations rpcsec_gss_net_ops = { 1698a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky .init = rpcsec_gss_init_net, 1699a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky .exit = rpcsec_gss_exit_net, 1700a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky}; 1701a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initialize RPCSEC_GSS module 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_rpcsec_gss(void) 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = rpcauth_register(&authgss_ops); 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = gss_svc_init(); 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_unregister; 1715a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky err = register_pernet_subsys(&rpcsec_gss_net_ops); 1716a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky if (err) 1717a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky goto out_svc_exit; 171879a3f20b641f9f93787ada49d1d7cfa98ee5a11e\"J. Bruce Fields\ rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1720a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsburskyout_svc_exit: 1721a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky gss_svc_shutdown(); 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_unregister: 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit exit_rpcsec_gss(void) 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1730a1db410d0bbadc49943f0fcddb21702ceb429396Stanislav Kinsbursky unregister_pernet_subsys(&rpcsec_gss_net_ops); 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gss_svc_shutdown(); 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rpcauth_unregister(&authgss_ops); 1733bf12691d846b48fa6e3289810a822687457036cfJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1737126e216a8730532dfb685205309275f87e3d133eTrond Myklebustmodule_param_named(expired_cred_retry_delay, 1738126e216a8730532dfb685205309275f87e3d133eTrond Myklebust gss_expired_cred_retry_delay, 1739126e216a8730532dfb685205309275f87e3d133eTrond Myklebust uint, 0644); 1740126e216a8730532dfb685205309275f87e3d133eTrond MyklebustMODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " 1741126e216a8730532dfb685205309275f87e3d133eTrond Myklebust "the RPC engine retries an expired credential"); 1742126e216a8730532dfb685205309275f87e3d133eTrond Myklebust 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_rpcsec_gss) 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(exit_rpcsec_gss) 1745