Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1 | /* |
| 2 | * GPL HEADER START |
| 3 | * |
| 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 only, |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License version 2 for more details (a copy is included |
| 14 | * in the LICENSE file that accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * version 2 along with this program; If not, see |
| 18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | * |
| 24 | * GPL HEADER END |
| 25 | */ |
| 26 | /* |
| 27 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| 28 | * Use is subject to license terms. |
| 29 | * |
| 30 | * Copyright (c) 2011, 2012, Intel Corporation. |
| 31 | */ |
| 32 | /* |
| 33 | * This file is part of Lustre, http://www.lustre.org/ |
| 34 | * Lustre is a trademark of Sun Microsystems, Inc. |
| 35 | * |
| 36 | * lustre/ptlrpc/sec.c |
| 37 | * |
| 38 | * Author: Eric Mei <ericm@clusterfs.com> |
| 39 | */ |
| 40 | |
| 41 | #define DEBUG_SUBSYSTEM S_SEC |
| 42 | |
| 43 | #include <linux/libcfs/libcfs.h> |
| 44 | #include <linux/crypto.h> |
| 45 | #include <linux/key.h> |
| 46 | |
| 47 | #include <obd.h> |
| 48 | #include <obd_class.h> |
| 49 | #include <obd_support.h> |
| 50 | #include <lustre_net.h> |
| 51 | #include <lustre_import.h> |
| 52 | #include <lustre_dlm.h> |
| 53 | #include <lustre_sec.h> |
| 54 | |
| 55 | #include "ptlrpc_internal.h" |
| 56 | |
| 57 | /*********************************************** |
| 58 | * policy registers * |
| 59 | ***********************************************/ |
| 60 | |
| 61 | static rwlock_t policy_lock; |
| 62 | static struct ptlrpc_sec_policy *policies[SPTLRPC_POLICY_MAX] = { |
| 63 | NULL, |
| 64 | }; |
| 65 | |
| 66 | int sptlrpc_register_policy(struct ptlrpc_sec_policy *policy) |
| 67 | { |
| 68 | __u16 number = policy->sp_policy; |
| 69 | |
| 70 | LASSERT(policy->sp_name); |
| 71 | LASSERT(policy->sp_cops); |
| 72 | LASSERT(policy->sp_sops); |
| 73 | |
| 74 | if (number >= SPTLRPC_POLICY_MAX) |
| 75 | return -EINVAL; |
| 76 | |
| 77 | write_lock(&policy_lock); |
| 78 | if (unlikely(policies[number])) { |
| 79 | write_unlock(&policy_lock); |
| 80 | return -EALREADY; |
| 81 | } |
| 82 | policies[number] = policy; |
| 83 | write_unlock(&policy_lock); |
| 84 | |
| 85 | CDEBUG(D_SEC, "%s: registered\n", policy->sp_name); |
| 86 | return 0; |
| 87 | } |
| 88 | EXPORT_SYMBOL(sptlrpc_register_policy); |
| 89 | |
| 90 | int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy) |
| 91 | { |
| 92 | __u16 number = policy->sp_policy; |
| 93 | |
| 94 | LASSERT(number < SPTLRPC_POLICY_MAX); |
| 95 | |
| 96 | write_lock(&policy_lock); |
| 97 | if (unlikely(policies[number] == NULL)) { |
| 98 | write_unlock(&policy_lock); |
| 99 | CERROR("%s: already unregistered\n", policy->sp_name); |
| 100 | return -EINVAL; |
| 101 | } |
| 102 | |
| 103 | LASSERT(policies[number] == policy); |
| 104 | policies[number] = NULL; |
| 105 | write_unlock(&policy_lock); |
| 106 | |
| 107 | CDEBUG(D_SEC, "%s: unregistered\n", policy->sp_name); |
| 108 | return 0; |
| 109 | } |
| 110 | EXPORT_SYMBOL(sptlrpc_unregister_policy); |
| 111 | |
| 112 | static |
| 113 | struct ptlrpc_sec_policy * sptlrpc_wireflavor2policy(__u32 flavor) |
| 114 | { |
| 115 | static DEFINE_MUTEX(load_mutex); |
| 116 | static atomic_t loaded = ATOMIC_INIT(0); |
| 117 | struct ptlrpc_sec_policy *policy; |
| 118 | __u16 number = SPTLRPC_FLVR_POLICY(flavor); |
| 119 | __u16 flag = 0; |
| 120 | |
| 121 | if (number >= SPTLRPC_POLICY_MAX) |
| 122 | return NULL; |
| 123 | |
| 124 | while (1) { |
| 125 | read_lock(&policy_lock); |
| 126 | policy = policies[number]; |
| 127 | if (policy && !try_module_get(policy->sp_owner)) |
| 128 | policy = NULL; |
| 129 | if (policy == NULL) |
| 130 | flag = atomic_read(&loaded); |
| 131 | read_unlock(&policy_lock); |
| 132 | |
| 133 | if (policy != NULL || flag != 0 || |
| 134 | number != SPTLRPC_POLICY_GSS) |
| 135 | break; |
| 136 | |
| 137 | /* try to load gss module, once */ |
| 138 | mutex_lock(&load_mutex); |
| 139 | if (atomic_read(&loaded) == 0) { |
| 140 | if (request_module("ptlrpc_gss") == 0) |
| 141 | CDEBUG(D_SEC, |
| 142 | "module ptlrpc_gss loaded on demand\n"); |
| 143 | else |
| 144 | CERROR("Unable to load module ptlrpc_gss\n"); |
| 145 | |
| 146 | atomic_set(&loaded, 1); |
| 147 | } |
| 148 | mutex_unlock(&load_mutex); |
| 149 | } |
| 150 | |
| 151 | return policy; |
| 152 | } |
| 153 | |
| 154 | __u32 sptlrpc_name2flavor_base(const char *name) |
| 155 | { |
| 156 | if (!strcmp(name, "null")) |
| 157 | return SPTLRPC_FLVR_NULL; |
| 158 | if (!strcmp(name, "plain")) |
| 159 | return SPTLRPC_FLVR_PLAIN; |
| 160 | if (!strcmp(name, "krb5n")) |
| 161 | return SPTLRPC_FLVR_KRB5N; |
| 162 | if (!strcmp(name, "krb5a")) |
| 163 | return SPTLRPC_FLVR_KRB5A; |
| 164 | if (!strcmp(name, "krb5i")) |
| 165 | return SPTLRPC_FLVR_KRB5I; |
| 166 | if (!strcmp(name, "krb5p")) |
| 167 | return SPTLRPC_FLVR_KRB5P; |
| 168 | |
| 169 | return SPTLRPC_FLVR_INVALID; |
| 170 | } |
| 171 | EXPORT_SYMBOL(sptlrpc_name2flavor_base); |
| 172 | |
| 173 | const char *sptlrpc_flavor2name_base(__u32 flvr) |
| 174 | { |
| 175 | __u32 base = SPTLRPC_FLVR_BASE(flvr); |
| 176 | |
| 177 | if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) |
| 178 | return "null"; |
| 179 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN)) |
| 180 | return "plain"; |
| 181 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5N)) |
| 182 | return "krb5n"; |
| 183 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5A)) |
| 184 | return "krb5a"; |
| 185 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5I)) |
| 186 | return "krb5i"; |
| 187 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5P)) |
| 188 | return "krb5p"; |
| 189 | |
| 190 | CERROR("invalid wire flavor 0x%x\n", flvr); |
| 191 | return "invalid"; |
| 192 | } |
| 193 | EXPORT_SYMBOL(sptlrpc_flavor2name_base); |
| 194 | |
| 195 | char *sptlrpc_flavor2name_bulk(struct sptlrpc_flavor *sf, |
| 196 | char *buf, int bufsize) |
| 197 | { |
| 198 | if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) |
| 199 | snprintf(buf, bufsize, "hash:%s", |
| 200 | sptlrpc_get_hash_name(sf->u_bulk.hash.hash_alg)); |
| 201 | else |
| 202 | snprintf(buf, bufsize, "%s", |
| 203 | sptlrpc_flavor2name_base(sf->sf_rpc)); |
| 204 | |
| 205 | buf[bufsize - 1] = '\0'; |
| 206 | return buf; |
| 207 | } |
| 208 | EXPORT_SYMBOL(sptlrpc_flavor2name_bulk); |
| 209 | |
| 210 | char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize) |
| 211 | { |
| 212 | snprintf(buf, bufsize, "%s", sptlrpc_flavor2name_base(sf->sf_rpc)); |
| 213 | |
| 214 | /* |
| 215 | * currently we don't support customized bulk specification for |
| 216 | * flavors other than plain |
| 217 | */ |
| 218 | if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) { |
| 219 | char bspec[16]; |
| 220 | |
| 221 | bspec[0] = '-'; |
| 222 | sptlrpc_flavor2name_bulk(sf, &bspec[1], sizeof(bspec) - 1); |
| 223 | strncat(buf, bspec, bufsize); |
| 224 | } |
| 225 | |
| 226 | buf[bufsize - 1] = '\0'; |
| 227 | return buf; |
| 228 | } |
| 229 | EXPORT_SYMBOL(sptlrpc_flavor2name); |
| 230 | |
| 231 | char *sptlrpc_secflags2str(__u32 flags, char *buf, int bufsize) |
| 232 | { |
| 233 | buf[0] = '\0'; |
| 234 | |
| 235 | if (flags & PTLRPC_SEC_FL_REVERSE) |
| 236 | strlcat(buf, "reverse,", bufsize); |
| 237 | if (flags & PTLRPC_SEC_FL_ROOTONLY) |
| 238 | strlcat(buf, "rootonly,", bufsize); |
| 239 | if (flags & PTLRPC_SEC_FL_UDESC) |
| 240 | strlcat(buf, "udesc,", bufsize); |
| 241 | if (flags & PTLRPC_SEC_FL_BULK) |
| 242 | strlcat(buf, "bulk,", bufsize); |
| 243 | if (buf[0] == '\0') |
| 244 | strlcat(buf, "-,", bufsize); |
| 245 | |
| 246 | return buf; |
| 247 | } |
| 248 | EXPORT_SYMBOL(sptlrpc_secflags2str); |
| 249 | |
| 250 | /************************************************** |
| 251 | * client context APIs * |
| 252 | **************************************************/ |
| 253 | |
| 254 | static |
| 255 | struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec) |
| 256 | { |
| 257 | struct vfs_cred vcred; |
| 258 | int create = 1, remove_dead = 1; |
| 259 | |
| 260 | LASSERT(sec); |
| 261 | LASSERT(sec->ps_policy->sp_cops->lookup_ctx); |
| 262 | |
| 263 | if (sec->ps_flvr.sf_flags & (PTLRPC_SEC_FL_REVERSE | |
| 264 | PTLRPC_SEC_FL_ROOTONLY)) { |
| 265 | vcred.vc_uid = 0; |
| 266 | vcred.vc_gid = 0; |
| 267 | if (sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_REVERSE) { |
| 268 | create = 0; |
| 269 | remove_dead = 0; |
| 270 | } |
| 271 | } else { |
Peng Tao | 4b1a25f | 2013-07-15 22:27:14 +0800 | [diff] [blame] | 272 | vcred.vc_uid = from_kuid(&init_user_ns, current_uid()); |
| 273 | vcred.vc_gid = from_kgid(&init_user_ns, current_gid()); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | return sec->ps_policy->sp_cops->lookup_ctx(sec, &vcred, |
| 277 | create, remove_dead); |
| 278 | } |
| 279 | |
| 280 | struct ptlrpc_cli_ctx *sptlrpc_cli_ctx_get(struct ptlrpc_cli_ctx *ctx) |
| 281 | { |
| 282 | atomic_inc(&ctx->cc_refcount); |
| 283 | return ctx; |
| 284 | } |
| 285 | EXPORT_SYMBOL(sptlrpc_cli_ctx_get); |
| 286 | |
| 287 | void sptlrpc_cli_ctx_put(struct ptlrpc_cli_ctx *ctx, int sync) |
| 288 | { |
| 289 | struct ptlrpc_sec *sec = ctx->cc_sec; |
| 290 | |
| 291 | LASSERT(sec); |
| 292 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); |
| 293 | |
| 294 | if (!atomic_dec_and_test(&ctx->cc_refcount)) |
| 295 | return; |
| 296 | |
| 297 | sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync); |
| 298 | } |
| 299 | EXPORT_SYMBOL(sptlrpc_cli_ctx_put); |
| 300 | |
| 301 | /** |
| 302 | * Expire the client context immediately. |
| 303 | * |
| 304 | * \pre Caller must hold at least 1 reference on the \a ctx. |
| 305 | */ |
| 306 | void sptlrpc_cli_ctx_expire(struct ptlrpc_cli_ctx *ctx) |
| 307 | { |
| 308 | LASSERT(ctx->cc_ops->die); |
| 309 | ctx->cc_ops->die(ctx, 0); |
| 310 | } |
| 311 | EXPORT_SYMBOL(sptlrpc_cli_ctx_expire); |
| 312 | |
| 313 | /** |
| 314 | * To wake up the threads who are waiting for this client context. Called |
| 315 | * after some status change happened on \a ctx. |
| 316 | */ |
| 317 | void sptlrpc_cli_ctx_wakeup(struct ptlrpc_cli_ctx *ctx) |
| 318 | { |
| 319 | struct ptlrpc_request *req, *next; |
| 320 | |
| 321 | spin_lock(&ctx->cc_lock); |
| 322 | list_for_each_entry_safe(req, next, &ctx->cc_req_list, |
| 323 | rq_ctx_chain) { |
| 324 | list_del_init(&req->rq_ctx_chain); |
| 325 | ptlrpc_client_wake_req(req); |
| 326 | } |
| 327 | spin_unlock(&ctx->cc_lock); |
| 328 | } |
| 329 | EXPORT_SYMBOL(sptlrpc_cli_ctx_wakeup); |
| 330 | |
| 331 | int sptlrpc_cli_ctx_display(struct ptlrpc_cli_ctx *ctx, char *buf, int bufsize) |
| 332 | { |
| 333 | LASSERT(ctx->cc_ops); |
| 334 | |
| 335 | if (ctx->cc_ops->display == NULL) |
| 336 | return 0; |
| 337 | |
| 338 | return ctx->cc_ops->display(ctx, buf, bufsize); |
| 339 | } |
| 340 | |
| 341 | static int import_sec_check_expire(struct obd_import *imp) |
| 342 | { |
| 343 | int adapt = 0; |
| 344 | |
| 345 | spin_lock(&imp->imp_lock); |
| 346 | if (imp->imp_sec_expire && |
| 347 | imp->imp_sec_expire < cfs_time_current_sec()) { |
| 348 | adapt = 1; |
| 349 | imp->imp_sec_expire = 0; |
| 350 | } |
| 351 | spin_unlock(&imp->imp_lock); |
| 352 | |
| 353 | if (!adapt) |
| 354 | return 0; |
| 355 | |
| 356 | CDEBUG(D_SEC, "found delayed sec adapt expired, do it now\n"); |
| 357 | return sptlrpc_import_sec_adapt(imp, NULL, 0); |
| 358 | } |
| 359 | |
| 360 | static int import_sec_validate_get(struct obd_import *imp, |
| 361 | struct ptlrpc_sec **sec) |
| 362 | { |
| 363 | int rc; |
| 364 | |
| 365 | if (unlikely(imp->imp_sec_expire)) { |
| 366 | rc = import_sec_check_expire(imp); |
| 367 | if (rc) |
| 368 | return rc; |
| 369 | } |
| 370 | |
| 371 | *sec = sptlrpc_import_sec_ref(imp); |
| 372 | if (*sec == NULL) { |
| 373 | CERROR("import %p (%s) with no sec\n", |
| 374 | imp, ptlrpc_import_state_name(imp->imp_state)); |
| 375 | return -EACCES; |
| 376 | } |
| 377 | |
| 378 | if (unlikely((*sec)->ps_dying)) { |
| 379 | CERROR("attempt to use dying sec %p\n", sec); |
| 380 | sptlrpc_sec_put(*sec); |
| 381 | return -EACCES; |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * Given a \a req, find or allocate a appropriate context for it. |
| 389 | * \pre req->rq_cli_ctx == NULL. |
| 390 | * |
| 391 | * \retval 0 succeed, and req->rq_cli_ctx is set. |
| 392 | * \retval -ev error number, and req->rq_cli_ctx == NULL. |
| 393 | */ |
| 394 | int sptlrpc_req_get_ctx(struct ptlrpc_request *req) |
| 395 | { |
| 396 | struct obd_import *imp = req->rq_import; |
| 397 | struct ptlrpc_sec *sec; |
| 398 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 399 | |
| 400 | LASSERT(!req->rq_cli_ctx); |
| 401 | LASSERT(imp); |
| 402 | |
| 403 | rc = import_sec_validate_get(imp, &sec); |
| 404 | if (rc) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 405 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 406 | |
| 407 | req->rq_cli_ctx = get_my_ctx(sec); |
| 408 | |
| 409 | sptlrpc_sec_put(sec); |
| 410 | |
| 411 | if (!req->rq_cli_ctx) { |
| 412 | CERROR("req %p: fail to get context\n", req); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 413 | return -ENOMEM; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 414 | } |
| 415 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 416 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Drop the context for \a req. |
| 421 | * \pre req->rq_cli_ctx != NULL. |
| 422 | * \post req->rq_cli_ctx == NULL. |
| 423 | * |
| 424 | * If \a sync == 0, this function should return quickly without sleep; |
| 425 | * otherwise it might trigger and wait for the whole process of sending |
| 426 | * an context-destroying rpc to server. |
| 427 | */ |
| 428 | void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync) |
| 429 | { |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 430 | LASSERT(req); |
| 431 | LASSERT(req->rq_cli_ctx); |
| 432 | |
| 433 | /* request might be asked to release earlier while still |
| 434 | * in the context waiting list. |
| 435 | */ |
| 436 | if (!list_empty(&req->rq_ctx_chain)) { |
| 437 | spin_lock(&req->rq_cli_ctx->cc_lock); |
| 438 | list_del_init(&req->rq_ctx_chain); |
| 439 | spin_unlock(&req->rq_cli_ctx->cc_lock); |
| 440 | } |
| 441 | |
| 442 | sptlrpc_cli_ctx_put(req->rq_cli_ctx, sync); |
| 443 | req->rq_cli_ctx = NULL; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | static |
| 447 | int sptlrpc_req_ctx_switch(struct ptlrpc_request *req, |
| 448 | struct ptlrpc_cli_ctx *oldctx, |
| 449 | struct ptlrpc_cli_ctx *newctx) |
| 450 | { |
| 451 | struct sptlrpc_flavor old_flvr; |
| 452 | char *reqmsg = NULL; /* to workaround old gcc */ |
| 453 | int reqmsg_size; |
| 454 | int rc = 0; |
| 455 | |
| 456 | LASSERT(req->rq_reqmsg); |
| 457 | LASSERT(req->rq_reqlen); |
| 458 | LASSERT(req->rq_replen); |
| 459 | |
| 460 | CDEBUG(D_SEC, "req %p: switch ctx %p(%u->%s) -> %p(%u->%s), " |
| 461 | "switch sec %p(%s) -> %p(%s)\n", req, |
| 462 | oldctx, oldctx->cc_vcred.vc_uid, sec2target_str(oldctx->cc_sec), |
| 463 | newctx, newctx->cc_vcred.vc_uid, sec2target_str(newctx->cc_sec), |
| 464 | oldctx->cc_sec, oldctx->cc_sec->ps_policy->sp_name, |
| 465 | newctx->cc_sec, newctx->cc_sec->ps_policy->sp_name); |
| 466 | |
| 467 | /* save flavor */ |
| 468 | old_flvr = req->rq_flvr; |
| 469 | |
| 470 | /* save request message */ |
| 471 | reqmsg_size = req->rq_reqlen; |
| 472 | if (reqmsg_size != 0) { |
| 473 | OBD_ALLOC_LARGE(reqmsg, reqmsg_size); |
| 474 | if (reqmsg == NULL) |
| 475 | return -ENOMEM; |
| 476 | memcpy(reqmsg, req->rq_reqmsg, reqmsg_size); |
| 477 | } |
| 478 | |
| 479 | /* release old req/rep buf */ |
| 480 | req->rq_cli_ctx = oldctx; |
| 481 | sptlrpc_cli_free_reqbuf(req); |
| 482 | sptlrpc_cli_free_repbuf(req); |
| 483 | req->rq_cli_ctx = newctx; |
| 484 | |
| 485 | /* recalculate the flavor */ |
| 486 | sptlrpc_req_set_flavor(req, 0); |
| 487 | |
| 488 | /* alloc new request buffer |
| 489 | * we don't need to alloc reply buffer here, leave it to the |
| 490 | * rest procedure of ptlrpc */ |
| 491 | if (reqmsg_size != 0) { |
| 492 | rc = sptlrpc_cli_alloc_reqbuf(req, reqmsg_size); |
| 493 | if (!rc) { |
| 494 | LASSERT(req->rq_reqmsg); |
| 495 | memcpy(req->rq_reqmsg, reqmsg, reqmsg_size); |
| 496 | } else { |
| 497 | CWARN("failed to alloc reqbuf: %d\n", rc); |
| 498 | req->rq_flvr = old_flvr; |
| 499 | } |
| 500 | |
| 501 | OBD_FREE_LARGE(reqmsg, reqmsg_size); |
| 502 | } |
| 503 | return rc; |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * If current context of \a req is dead somehow, e.g. we just switched flavor |
| 508 | * thus marked original contexts dead, we'll find a new context for it. if |
| 509 | * no switch is needed, \a req will end up with the same context. |
| 510 | * |
| 511 | * \note a request must have a context, to keep other parts of code happy. |
| 512 | * In any case of failure during the switching, we must restore the old one. |
| 513 | */ |
| 514 | int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req) |
| 515 | { |
| 516 | struct ptlrpc_cli_ctx *oldctx = req->rq_cli_ctx; |
| 517 | struct ptlrpc_cli_ctx *newctx; |
| 518 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 519 | |
| 520 | LASSERT(oldctx); |
| 521 | |
| 522 | sptlrpc_cli_ctx_get(oldctx); |
| 523 | sptlrpc_req_put_ctx(req, 0); |
| 524 | |
| 525 | rc = sptlrpc_req_get_ctx(req); |
| 526 | if (unlikely(rc)) { |
| 527 | LASSERT(!req->rq_cli_ctx); |
| 528 | |
| 529 | /* restore old ctx */ |
| 530 | req->rq_cli_ctx = oldctx; |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 531 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | newctx = req->rq_cli_ctx; |
| 535 | LASSERT(newctx); |
| 536 | |
| 537 | if (unlikely(newctx == oldctx && |
| 538 | test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags))) { |
| 539 | /* |
| 540 | * still get the old dead ctx, usually means system too busy |
| 541 | */ |
| 542 | CDEBUG(D_SEC, |
| 543 | "ctx (%p, fl %lx) doesn't switch, relax a little bit\n", |
| 544 | newctx, newctx->cc_flags); |
| 545 | |
Peng Tao | 18fd5ba | 2014-03-18 21:05:55 +0800 | [diff] [blame^] | 546 | set_current_state(TASK_INTERRUPTIBLE); |
| 547 | schedule_timeout(HZ); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 548 | } else { |
| 549 | /* |
| 550 | * it's possible newctx == oldctx if we're switching |
| 551 | * subflavor with the same sec. |
| 552 | */ |
| 553 | rc = sptlrpc_req_ctx_switch(req, oldctx, newctx); |
| 554 | if (rc) { |
| 555 | /* restore old ctx */ |
| 556 | sptlrpc_req_put_ctx(req, 0); |
| 557 | req->rq_cli_ctx = oldctx; |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 558 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | LASSERT(req->rq_cli_ctx == newctx); |
| 562 | } |
| 563 | |
| 564 | sptlrpc_cli_ctx_put(oldctx, 1); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 565 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 566 | } |
| 567 | EXPORT_SYMBOL(sptlrpc_req_replace_dead_ctx); |
| 568 | |
| 569 | static |
| 570 | int ctx_check_refresh(struct ptlrpc_cli_ctx *ctx) |
| 571 | { |
| 572 | if (cli_ctx_is_refreshed(ctx)) |
| 573 | return 1; |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | static |
| 578 | int ctx_refresh_timeout(void *data) |
| 579 | { |
| 580 | struct ptlrpc_request *req = data; |
| 581 | int rc; |
| 582 | |
| 583 | /* conn_cnt is needed in expire_one_request */ |
| 584 | lustre_msg_set_conn_cnt(req->rq_reqmsg, req->rq_import->imp_conn_cnt); |
| 585 | |
| 586 | rc = ptlrpc_expire_one_request(req, 1); |
| 587 | /* if we started recovery, we should mark this ctx dead; otherwise |
| 588 | * in case of lgssd died nobody would retire this ctx, following |
| 589 | * connecting will still find the same ctx thus cause deadlock. |
| 590 | * there's an assumption that expire time of the request should be |
| 591 | * later than the context refresh expire time. |
| 592 | */ |
| 593 | if (rc == 0) |
| 594 | req->rq_cli_ctx->cc_ops->die(req->rq_cli_ctx, 0); |
| 595 | return rc; |
| 596 | } |
| 597 | |
| 598 | static |
| 599 | void ctx_refresh_interrupt(void *data) |
| 600 | { |
| 601 | struct ptlrpc_request *req = data; |
| 602 | |
| 603 | spin_lock(&req->rq_lock); |
| 604 | req->rq_intr = 1; |
| 605 | spin_unlock(&req->rq_lock); |
| 606 | } |
| 607 | |
| 608 | static |
| 609 | void req_off_ctx_list(struct ptlrpc_request *req, struct ptlrpc_cli_ctx *ctx) |
| 610 | { |
| 611 | spin_lock(&ctx->cc_lock); |
| 612 | if (!list_empty(&req->rq_ctx_chain)) |
| 613 | list_del_init(&req->rq_ctx_chain); |
| 614 | spin_unlock(&ctx->cc_lock); |
| 615 | } |
| 616 | |
| 617 | /** |
| 618 | * To refresh the context of \req, if it's not up-to-date. |
| 619 | * \param timeout |
| 620 | * - < 0: don't wait |
| 621 | * - = 0: wait until success or fatal error occur |
| 622 | * - > 0: timeout value (in seconds) |
| 623 | * |
| 624 | * The status of the context could be subject to be changed by other threads |
| 625 | * at any time. We allow this race, but once we return with 0, the caller will |
| 626 | * suppose it's uptodated and keep using it until the owning rpc is done. |
| 627 | * |
| 628 | * \retval 0 only if the context is uptodated. |
| 629 | * \retval -ev error number. |
| 630 | */ |
| 631 | int sptlrpc_req_refresh_ctx(struct ptlrpc_request *req, long timeout) |
| 632 | { |
| 633 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 634 | struct ptlrpc_sec *sec; |
| 635 | struct l_wait_info lwi; |
| 636 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 637 | |
| 638 | LASSERT(ctx); |
| 639 | |
| 640 | if (req->rq_ctx_init || req->rq_ctx_fini) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 641 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 642 | |
| 643 | /* |
| 644 | * during the process a request's context might change type even |
| 645 | * (e.g. from gss ctx to null ctx), so each loop we need to re-check |
| 646 | * everything |
| 647 | */ |
| 648 | again: |
| 649 | rc = import_sec_validate_get(req->rq_import, &sec); |
| 650 | if (rc) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 651 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 652 | |
| 653 | if (sec->ps_flvr.sf_rpc != req->rq_flvr.sf_rpc) { |
| 654 | CDEBUG(D_SEC, "req %p: flavor has changed %x -> %x\n", |
| 655 | req, req->rq_flvr.sf_rpc, sec->ps_flvr.sf_rpc); |
| 656 | req_off_ctx_list(req, ctx); |
| 657 | sptlrpc_req_replace_dead_ctx(req); |
| 658 | ctx = req->rq_cli_ctx; |
| 659 | } |
| 660 | sptlrpc_sec_put(sec); |
| 661 | |
| 662 | if (cli_ctx_is_eternal(ctx)) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 663 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 664 | |
| 665 | if (unlikely(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags))) { |
| 666 | LASSERT(ctx->cc_ops->refresh); |
| 667 | ctx->cc_ops->refresh(ctx); |
| 668 | } |
| 669 | LASSERT(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags) == 0); |
| 670 | |
| 671 | LASSERT(ctx->cc_ops->validate); |
| 672 | if (ctx->cc_ops->validate(ctx) == 0) { |
| 673 | req_off_ctx_list(req, ctx); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 674 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | if (unlikely(test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags))) { |
| 678 | spin_lock(&req->rq_lock); |
| 679 | req->rq_err = 1; |
| 680 | spin_unlock(&req->rq_lock); |
| 681 | req_off_ctx_list(req, ctx); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 682 | return -EPERM; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | /* |
| 686 | * There's a subtle issue for resending RPCs, suppose following |
| 687 | * situation: |
| 688 | * 1. the request was sent to server. |
| 689 | * 2. recovery was kicked start, after finished the request was |
| 690 | * marked as resent. |
| 691 | * 3. resend the request. |
| 692 | * 4. old reply from server received, we accept and verify the reply. |
| 693 | * this has to be success, otherwise the error will be aware |
| 694 | * by application. |
| 695 | * 5. new reply from server received, dropped by LNet. |
| 696 | * |
| 697 | * Note the xid of old & new request is the same. We can't simply |
| 698 | * change xid for the resent request because the server replies on |
| 699 | * it for reply reconstruction. |
| 700 | * |
| 701 | * Commonly the original context should be uptodate because we |
| 702 | * have a expiry nice time; server will keep its context because |
| 703 | * we at least hold a ref of old context which prevent context |
| 704 | * destroying RPC being sent. So server still can accept the request |
| 705 | * and finish the RPC. But if that's not the case: |
| 706 | * 1. If server side context has been trimmed, a NO_CONTEXT will |
| 707 | * be returned, gss_cli_ctx_verify/unseal will switch to new |
| 708 | * context by force. |
| 709 | * 2. Current context never be refreshed, then we are fine: we |
| 710 | * never really send request with old context before. |
| 711 | */ |
| 712 | if (test_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags) && |
| 713 | unlikely(req->rq_reqmsg) && |
| 714 | lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { |
| 715 | req_off_ctx_list(req, ctx); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 716 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | if (unlikely(test_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags))) { |
| 720 | req_off_ctx_list(req, ctx); |
| 721 | /* |
| 722 | * don't switch ctx if import was deactivated |
| 723 | */ |
| 724 | if (req->rq_import->imp_deactive) { |
| 725 | spin_lock(&req->rq_lock); |
| 726 | req->rq_err = 1; |
| 727 | spin_unlock(&req->rq_lock); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 728 | return -EINTR; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | rc = sptlrpc_req_replace_dead_ctx(req); |
| 732 | if (rc) { |
| 733 | LASSERT(ctx == req->rq_cli_ctx); |
| 734 | CERROR("req %p: failed to replace dead ctx %p: %d\n", |
| 735 | req, ctx, rc); |
| 736 | spin_lock(&req->rq_lock); |
| 737 | req->rq_err = 1; |
| 738 | spin_unlock(&req->rq_lock); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 739 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | ctx = req->rq_cli_ctx; |
| 743 | goto again; |
| 744 | } |
| 745 | |
| 746 | /* |
| 747 | * Now we're sure this context is during upcall, add myself into |
| 748 | * waiting list |
| 749 | */ |
| 750 | spin_lock(&ctx->cc_lock); |
| 751 | if (list_empty(&req->rq_ctx_chain)) |
| 752 | list_add(&req->rq_ctx_chain, &ctx->cc_req_list); |
| 753 | spin_unlock(&ctx->cc_lock); |
| 754 | |
| 755 | if (timeout < 0) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 756 | return -EWOULDBLOCK; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 757 | |
| 758 | /* Clear any flags that may be present from previous sends */ |
| 759 | LASSERT(req->rq_receiving_reply == 0); |
| 760 | spin_lock(&req->rq_lock); |
| 761 | req->rq_err = 0; |
| 762 | req->rq_timedout = 0; |
| 763 | req->rq_resend = 0; |
| 764 | req->rq_restart = 0; |
| 765 | spin_unlock(&req->rq_lock); |
| 766 | |
| 767 | lwi = LWI_TIMEOUT_INTR(timeout * HZ, ctx_refresh_timeout, |
| 768 | ctx_refresh_interrupt, req); |
| 769 | rc = l_wait_event(req->rq_reply_waitq, ctx_check_refresh(ctx), &lwi); |
| 770 | |
| 771 | /* |
| 772 | * following cases could lead us here: |
| 773 | * - successfully refreshed; |
| 774 | * - interrupted; |
| 775 | * - timedout, and we don't want recover from the failure; |
| 776 | * - timedout, and waked up upon recovery finished; |
| 777 | * - someone else mark this ctx dead by force; |
| 778 | * - someone invalidate the req and call ptlrpc_client_wake_req(), |
| 779 | * e.g. ptlrpc_abort_inflight(); |
| 780 | */ |
| 781 | if (!cli_ctx_is_refreshed(ctx)) { |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 782 | /* timed out or interrupted */ |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 783 | req_off_ctx_list(req, ctx); |
| 784 | |
| 785 | LASSERT(rc != 0); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 786 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | goto again; |
| 790 | } |
| 791 | |
| 792 | /** |
| 793 | * Initialize flavor settings for \a req, according to \a opcode. |
| 794 | * |
| 795 | * \note this could be called in two situations: |
| 796 | * - new request from ptlrpc_pre_req(), with proper @opcode |
| 797 | * - old request which changed ctx in the middle, with @opcode == 0 |
| 798 | */ |
| 799 | void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode) |
| 800 | { |
| 801 | struct ptlrpc_sec *sec; |
| 802 | |
| 803 | LASSERT(req->rq_import); |
| 804 | LASSERT(req->rq_cli_ctx); |
| 805 | LASSERT(req->rq_cli_ctx->cc_sec); |
| 806 | LASSERT(req->rq_bulk_read == 0 || req->rq_bulk_write == 0); |
| 807 | |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 808 | /* special security flags according to opcode */ |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 809 | switch (opcode) { |
| 810 | case OST_READ: |
| 811 | case MDS_READPAGE: |
| 812 | case MGS_CONFIG_READ: |
| 813 | case OBD_IDX_READ: |
| 814 | req->rq_bulk_read = 1; |
| 815 | break; |
| 816 | case OST_WRITE: |
| 817 | case MDS_WRITEPAGE: |
| 818 | req->rq_bulk_write = 1; |
| 819 | break; |
| 820 | case SEC_CTX_INIT: |
| 821 | req->rq_ctx_init = 1; |
| 822 | break; |
| 823 | case SEC_CTX_FINI: |
| 824 | req->rq_ctx_fini = 1; |
| 825 | break; |
| 826 | case 0: |
| 827 | /* init/fini rpc won't be resend, so can't be here */ |
| 828 | LASSERT(req->rq_ctx_init == 0); |
| 829 | LASSERT(req->rq_ctx_fini == 0); |
| 830 | |
| 831 | /* cleanup flags, which should be recalculated */ |
| 832 | req->rq_pack_udesc = 0; |
| 833 | req->rq_pack_bulk = 0; |
| 834 | break; |
| 835 | } |
| 836 | |
| 837 | sec = req->rq_cli_ctx->cc_sec; |
| 838 | |
| 839 | spin_lock(&sec->ps_lock); |
| 840 | req->rq_flvr = sec->ps_flvr; |
| 841 | spin_unlock(&sec->ps_lock); |
| 842 | |
| 843 | /* force SVC_NULL for context initiation rpc, SVC_INTG for context |
| 844 | * destruction rpc */ |
| 845 | if (unlikely(req->rq_ctx_init)) |
| 846 | flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_NULL); |
| 847 | else if (unlikely(req->rq_ctx_fini)) |
| 848 | flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_INTG); |
| 849 | |
| 850 | /* user descriptor flag, null security can't do it anyway */ |
| 851 | if ((sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_UDESC) && |
| 852 | (req->rq_flvr.sf_rpc != SPTLRPC_FLVR_NULL)) |
| 853 | req->rq_pack_udesc = 1; |
| 854 | |
| 855 | /* bulk security flag */ |
| 856 | if ((req->rq_bulk_read || req->rq_bulk_write) && |
| 857 | sptlrpc_flavor_has_bulk(&req->rq_flvr)) |
| 858 | req->rq_pack_bulk = 1; |
| 859 | } |
| 860 | |
| 861 | void sptlrpc_request_out_callback(struct ptlrpc_request *req) |
| 862 | { |
| 863 | if (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc) != SPTLRPC_SVC_PRIV) |
| 864 | return; |
| 865 | |
| 866 | LASSERT(req->rq_clrbuf); |
| 867 | if (req->rq_pool || !req->rq_reqbuf) |
| 868 | return; |
| 869 | |
| 870 | OBD_FREE(req->rq_reqbuf, req->rq_reqbuf_len); |
| 871 | req->rq_reqbuf = NULL; |
| 872 | req->rq_reqbuf_len = 0; |
| 873 | } |
| 874 | |
| 875 | /** |
| 876 | * Given an import \a imp, check whether current user has a valid context |
| 877 | * or not. We may create a new context and try to refresh it, and try |
| 878 | * repeatedly try in case of non-fatal errors. Return 0 means success. |
| 879 | */ |
| 880 | int sptlrpc_import_check_ctx(struct obd_import *imp) |
| 881 | { |
| 882 | struct ptlrpc_sec *sec; |
| 883 | struct ptlrpc_cli_ctx *ctx; |
| 884 | struct ptlrpc_request *req = NULL; |
| 885 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 886 | |
| 887 | might_sleep(); |
| 888 | |
| 889 | sec = sptlrpc_import_sec_ref(imp); |
| 890 | ctx = get_my_ctx(sec); |
| 891 | sptlrpc_sec_put(sec); |
| 892 | |
| 893 | if (!ctx) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 894 | return -ENOMEM; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 895 | |
| 896 | if (cli_ctx_is_eternal(ctx) || |
| 897 | ctx->cc_ops->validate(ctx) == 0) { |
| 898 | sptlrpc_cli_ctx_put(ctx, 1); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 899 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 900 | } |
| 901 | |
| 902 | if (cli_ctx_is_error(ctx)) { |
| 903 | sptlrpc_cli_ctx_put(ctx, 1); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 904 | return -EACCES; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 905 | } |
| 906 | |
| 907 | OBD_ALLOC_PTR(req); |
| 908 | if (!req) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 909 | return -ENOMEM; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 910 | |
| 911 | spin_lock_init(&req->rq_lock); |
| 912 | atomic_set(&req->rq_refcount, 10000); |
| 913 | INIT_LIST_HEAD(&req->rq_ctx_chain); |
| 914 | init_waitqueue_head(&req->rq_reply_waitq); |
| 915 | init_waitqueue_head(&req->rq_set_waitq); |
| 916 | req->rq_import = imp; |
| 917 | req->rq_flvr = sec->ps_flvr; |
| 918 | req->rq_cli_ctx = ctx; |
| 919 | |
| 920 | rc = sptlrpc_req_refresh_ctx(req, 0); |
| 921 | LASSERT(list_empty(&req->rq_ctx_chain)); |
| 922 | sptlrpc_cli_ctx_put(req->rq_cli_ctx, 1); |
| 923 | OBD_FREE_PTR(req); |
| 924 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 925 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | /** |
| 929 | * Used by ptlrpc client, to perform the pre-defined security transformation |
| 930 | * upon the request message of \a req. After this function called, |
| 931 | * req->rq_reqmsg is still accessible as clear text. |
| 932 | */ |
| 933 | int sptlrpc_cli_wrap_request(struct ptlrpc_request *req) |
| 934 | { |
| 935 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 936 | int rc = 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 937 | |
| 938 | LASSERT(ctx); |
| 939 | LASSERT(ctx->cc_sec); |
| 940 | LASSERT(req->rq_reqbuf || req->rq_clrbuf); |
| 941 | |
| 942 | /* we wrap bulk request here because now we can be sure |
| 943 | * the context is uptodate. |
| 944 | */ |
| 945 | if (req->rq_bulk) { |
| 946 | rc = sptlrpc_cli_wrap_bulk(req, req->rq_bulk); |
| 947 | if (rc) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 948 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { |
| 952 | case SPTLRPC_SVC_NULL: |
| 953 | case SPTLRPC_SVC_AUTH: |
| 954 | case SPTLRPC_SVC_INTG: |
| 955 | LASSERT(ctx->cc_ops->sign); |
| 956 | rc = ctx->cc_ops->sign(ctx, req); |
| 957 | break; |
| 958 | case SPTLRPC_SVC_PRIV: |
| 959 | LASSERT(ctx->cc_ops->seal); |
| 960 | rc = ctx->cc_ops->seal(ctx, req); |
| 961 | break; |
| 962 | default: |
| 963 | LBUG(); |
| 964 | } |
| 965 | |
| 966 | if (rc == 0) { |
| 967 | LASSERT(req->rq_reqdata_len); |
| 968 | LASSERT(req->rq_reqdata_len % 8 == 0); |
| 969 | LASSERT(req->rq_reqdata_len <= req->rq_reqbuf_len); |
| 970 | } |
| 971 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 972 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 973 | } |
| 974 | |
| 975 | static int do_cli_unwrap_reply(struct ptlrpc_request *req) |
| 976 | { |
| 977 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 978 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 979 | |
| 980 | LASSERT(ctx); |
| 981 | LASSERT(ctx->cc_sec); |
| 982 | LASSERT(req->rq_repbuf); |
| 983 | LASSERT(req->rq_repdata); |
| 984 | LASSERT(req->rq_repmsg == NULL); |
| 985 | |
| 986 | req->rq_rep_swab_mask = 0; |
| 987 | |
| 988 | rc = __lustre_unpack_msg(req->rq_repdata, req->rq_repdata_len); |
| 989 | switch (rc) { |
| 990 | case 1: |
| 991 | lustre_set_rep_swabbed(req, MSG_PTLRPC_HEADER_OFF); |
| 992 | case 0: |
| 993 | break; |
| 994 | default: |
| 995 | CERROR("failed unpack reply: x"LPU64"\n", req->rq_xid); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 996 | return -EPROTO; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | if (req->rq_repdata_len < sizeof(struct lustre_msg)) { |
| 1000 | CERROR("replied data length %d too small\n", |
| 1001 | req->rq_repdata_len); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1002 | return -EPROTO; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | if (SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr) != |
| 1006 | SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)) { |
| 1007 | CERROR("reply policy %u doesn't match request policy %u\n", |
| 1008 | SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr), |
| 1009 | SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1010 | return -EPROTO; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1011 | } |
| 1012 | |
| 1013 | switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { |
| 1014 | case SPTLRPC_SVC_NULL: |
| 1015 | case SPTLRPC_SVC_AUTH: |
| 1016 | case SPTLRPC_SVC_INTG: |
| 1017 | LASSERT(ctx->cc_ops->verify); |
| 1018 | rc = ctx->cc_ops->verify(ctx, req); |
| 1019 | break; |
| 1020 | case SPTLRPC_SVC_PRIV: |
| 1021 | LASSERT(ctx->cc_ops->unseal); |
| 1022 | rc = ctx->cc_ops->unseal(ctx, req); |
| 1023 | break; |
| 1024 | default: |
| 1025 | LBUG(); |
| 1026 | } |
| 1027 | LASSERT(rc || req->rq_repmsg || req->rq_resend); |
| 1028 | |
| 1029 | if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL && |
| 1030 | !req->rq_ctx_init) |
| 1031 | req->rq_rep_swab_mask = 0; |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1032 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1033 | } |
| 1034 | |
| 1035 | /** |
| 1036 | * Used by ptlrpc client, to perform security transformation upon the reply |
| 1037 | * message of \a req. After return successfully, req->rq_repmsg points to |
| 1038 | * the reply message in clear text. |
| 1039 | * |
| 1040 | * \pre the reply buffer should have been un-posted from LNet, so nothing is |
| 1041 | * going to change. |
| 1042 | */ |
| 1043 | int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) |
| 1044 | { |
| 1045 | LASSERT(req->rq_repbuf); |
| 1046 | LASSERT(req->rq_repdata == NULL); |
| 1047 | LASSERT(req->rq_repmsg == NULL); |
| 1048 | LASSERT(req->rq_reply_off + req->rq_nob_received <= req->rq_repbuf_len); |
| 1049 | |
| 1050 | if (req->rq_reply_off == 0 && |
| 1051 | (lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) { |
| 1052 | CERROR("real reply with offset 0\n"); |
| 1053 | return -EPROTO; |
| 1054 | } |
| 1055 | |
| 1056 | if (req->rq_reply_off % 8 != 0) { |
| 1057 | CERROR("reply at odd offset %u\n", req->rq_reply_off); |
| 1058 | return -EPROTO; |
| 1059 | } |
| 1060 | |
| 1061 | req->rq_repdata = (struct lustre_msg *) |
| 1062 | (req->rq_repbuf + req->rq_reply_off); |
| 1063 | req->rq_repdata_len = req->rq_nob_received; |
| 1064 | |
| 1065 | return do_cli_unwrap_reply(req); |
| 1066 | } |
| 1067 | |
| 1068 | /** |
| 1069 | * Used by ptlrpc client, to perform security transformation upon the early |
| 1070 | * reply message of \a req. We expect the rq_reply_off is 0, and |
| 1071 | * rq_nob_received is the early reply size. |
| 1072 | * |
| 1073 | * Because the receive buffer might be still posted, the reply data might be |
| 1074 | * changed at any time, no matter we're holding rq_lock or not. For this reason |
| 1075 | * we allocate a separate ptlrpc_request and reply buffer for early reply |
| 1076 | * processing. |
| 1077 | * |
| 1078 | * \retval 0 success, \a req_ret is filled with a duplicated ptlrpc_request. |
| 1079 | * Later the caller must call sptlrpc_cli_finish_early_reply() on the returned |
| 1080 | * \a *req_ret to release it. |
| 1081 | * \retval -ev error number, and \a req_ret will not be set. |
| 1082 | */ |
| 1083 | int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req, |
| 1084 | struct ptlrpc_request **req_ret) |
| 1085 | { |
| 1086 | struct ptlrpc_request *early_req; |
| 1087 | char *early_buf; |
| 1088 | int early_bufsz, early_size; |
| 1089 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1090 | |
| 1091 | OBD_ALLOC_PTR(early_req); |
| 1092 | if (early_req == NULL) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1093 | return -ENOMEM; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1094 | |
| 1095 | early_size = req->rq_nob_received; |
| 1096 | early_bufsz = size_roundup_power2(early_size); |
| 1097 | OBD_ALLOC_LARGE(early_buf, early_bufsz); |
| 1098 | if (early_buf == NULL) |
| 1099 | GOTO(err_req, rc = -ENOMEM); |
| 1100 | |
| 1101 | /* sanity checkings and copy data out, do it inside spinlock */ |
| 1102 | spin_lock(&req->rq_lock); |
| 1103 | |
| 1104 | if (req->rq_replied) { |
| 1105 | spin_unlock(&req->rq_lock); |
| 1106 | GOTO(err_buf, rc = -EALREADY); |
| 1107 | } |
| 1108 | |
| 1109 | LASSERT(req->rq_repbuf); |
| 1110 | LASSERT(req->rq_repdata == NULL); |
| 1111 | LASSERT(req->rq_repmsg == NULL); |
| 1112 | |
| 1113 | if (req->rq_reply_off != 0) { |
| 1114 | CERROR("early reply with offset %u\n", req->rq_reply_off); |
| 1115 | spin_unlock(&req->rq_lock); |
| 1116 | GOTO(err_buf, rc = -EPROTO); |
| 1117 | } |
| 1118 | |
| 1119 | if (req->rq_nob_received != early_size) { |
| 1120 | /* even another early arrived the size should be the same */ |
| 1121 | CERROR("data size has changed from %u to %u\n", |
| 1122 | early_size, req->rq_nob_received); |
| 1123 | spin_unlock(&req->rq_lock); |
| 1124 | GOTO(err_buf, rc = -EINVAL); |
| 1125 | } |
| 1126 | |
| 1127 | if (req->rq_nob_received < sizeof(struct lustre_msg)) { |
| 1128 | CERROR("early reply length %d too small\n", |
| 1129 | req->rq_nob_received); |
| 1130 | spin_unlock(&req->rq_lock); |
| 1131 | GOTO(err_buf, rc = -EALREADY); |
| 1132 | } |
| 1133 | |
| 1134 | memcpy(early_buf, req->rq_repbuf, early_size); |
| 1135 | spin_unlock(&req->rq_lock); |
| 1136 | |
| 1137 | spin_lock_init(&early_req->rq_lock); |
| 1138 | early_req->rq_cli_ctx = sptlrpc_cli_ctx_get(req->rq_cli_ctx); |
| 1139 | early_req->rq_flvr = req->rq_flvr; |
| 1140 | early_req->rq_repbuf = early_buf; |
| 1141 | early_req->rq_repbuf_len = early_bufsz; |
| 1142 | early_req->rq_repdata = (struct lustre_msg *) early_buf; |
| 1143 | early_req->rq_repdata_len = early_size; |
| 1144 | early_req->rq_early = 1; |
| 1145 | early_req->rq_reqmsg = req->rq_reqmsg; |
| 1146 | |
| 1147 | rc = do_cli_unwrap_reply(early_req); |
| 1148 | if (rc) { |
| 1149 | DEBUG_REQ(D_ADAPTTO, early_req, |
| 1150 | "error %d unwrap early reply", rc); |
| 1151 | GOTO(err_ctx, rc); |
| 1152 | } |
| 1153 | |
| 1154 | LASSERT(early_req->rq_repmsg); |
| 1155 | *req_ret = early_req; |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1156 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1157 | |
| 1158 | err_ctx: |
| 1159 | sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); |
| 1160 | err_buf: |
| 1161 | OBD_FREE_LARGE(early_buf, early_bufsz); |
| 1162 | err_req: |
| 1163 | OBD_FREE_PTR(early_req); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1164 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1165 | } |
| 1166 | |
| 1167 | /** |
| 1168 | * Used by ptlrpc client, to release a processed early reply \a early_req. |
| 1169 | * |
| 1170 | * \pre \a early_req was obtained from calling sptlrpc_cli_unwrap_early_reply(). |
| 1171 | */ |
| 1172 | void sptlrpc_cli_finish_early_reply(struct ptlrpc_request *early_req) |
| 1173 | { |
| 1174 | LASSERT(early_req->rq_repbuf); |
| 1175 | LASSERT(early_req->rq_repdata); |
| 1176 | LASSERT(early_req->rq_repmsg); |
| 1177 | |
| 1178 | sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); |
| 1179 | OBD_FREE_LARGE(early_req->rq_repbuf, early_req->rq_repbuf_len); |
| 1180 | OBD_FREE_PTR(early_req); |
| 1181 | } |
| 1182 | |
| 1183 | /************************************************** |
| 1184 | * sec ID * |
| 1185 | **************************************************/ |
| 1186 | |
| 1187 | /* |
| 1188 | * "fixed" sec (e.g. null) use sec_id < 0 |
| 1189 | */ |
| 1190 | static atomic_t sptlrpc_sec_id = ATOMIC_INIT(1); |
| 1191 | |
| 1192 | int sptlrpc_get_next_secid(void) |
| 1193 | { |
| 1194 | return atomic_inc_return(&sptlrpc_sec_id); |
| 1195 | } |
| 1196 | EXPORT_SYMBOL(sptlrpc_get_next_secid); |
| 1197 | |
| 1198 | /************************************************** |
| 1199 | * client side high-level security APIs * |
| 1200 | **************************************************/ |
| 1201 | |
| 1202 | static int sec_cop_flush_ctx_cache(struct ptlrpc_sec *sec, uid_t uid, |
| 1203 | int grace, int force) |
| 1204 | { |
| 1205 | struct ptlrpc_sec_policy *policy = sec->ps_policy; |
| 1206 | |
| 1207 | LASSERT(policy->sp_cops); |
| 1208 | LASSERT(policy->sp_cops->flush_ctx_cache); |
| 1209 | |
| 1210 | return policy->sp_cops->flush_ctx_cache(sec, uid, grace, force); |
| 1211 | } |
| 1212 | |
| 1213 | static void sec_cop_destroy_sec(struct ptlrpc_sec *sec) |
| 1214 | { |
| 1215 | struct ptlrpc_sec_policy *policy = sec->ps_policy; |
| 1216 | |
| 1217 | LASSERT_ATOMIC_ZERO(&sec->ps_refcount); |
| 1218 | LASSERT_ATOMIC_ZERO(&sec->ps_nctx); |
| 1219 | LASSERT(policy->sp_cops->destroy_sec); |
| 1220 | |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 1221 | CDEBUG(D_SEC, "%s@%p: being destroyed\n", sec->ps_policy->sp_name, sec); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1222 | |
| 1223 | policy->sp_cops->destroy_sec(sec); |
| 1224 | sptlrpc_policy_put(policy); |
| 1225 | } |
| 1226 | |
| 1227 | void sptlrpc_sec_destroy(struct ptlrpc_sec *sec) |
| 1228 | { |
| 1229 | sec_cop_destroy_sec(sec); |
| 1230 | } |
| 1231 | EXPORT_SYMBOL(sptlrpc_sec_destroy); |
| 1232 | |
| 1233 | static void sptlrpc_sec_kill(struct ptlrpc_sec *sec) |
| 1234 | { |
| 1235 | LASSERT_ATOMIC_POS(&sec->ps_refcount); |
| 1236 | |
| 1237 | if (sec->ps_policy->sp_cops->kill_sec) { |
| 1238 | sec->ps_policy->sp_cops->kill_sec(sec); |
| 1239 | |
| 1240 | sec_cop_flush_ctx_cache(sec, -1, 1, 1); |
| 1241 | } |
| 1242 | } |
| 1243 | |
| 1244 | struct ptlrpc_sec *sptlrpc_sec_get(struct ptlrpc_sec *sec) |
| 1245 | { |
| 1246 | if (sec) |
| 1247 | atomic_inc(&sec->ps_refcount); |
| 1248 | |
| 1249 | return sec; |
| 1250 | } |
| 1251 | EXPORT_SYMBOL(sptlrpc_sec_get); |
| 1252 | |
| 1253 | void sptlrpc_sec_put(struct ptlrpc_sec *sec) |
| 1254 | { |
| 1255 | if (sec) { |
| 1256 | LASSERT_ATOMIC_POS(&sec->ps_refcount); |
| 1257 | |
| 1258 | if (atomic_dec_and_test(&sec->ps_refcount)) { |
| 1259 | sptlrpc_gc_del_sec(sec); |
| 1260 | sec_cop_destroy_sec(sec); |
| 1261 | } |
| 1262 | } |
| 1263 | } |
| 1264 | EXPORT_SYMBOL(sptlrpc_sec_put); |
| 1265 | |
| 1266 | /* |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 1267 | * policy module is responsible for taking reference of import |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1268 | */ |
| 1269 | static |
| 1270 | struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp, |
| 1271 | struct ptlrpc_svc_ctx *svc_ctx, |
| 1272 | struct sptlrpc_flavor *sf, |
| 1273 | enum lustre_sec_part sp) |
| 1274 | { |
| 1275 | struct ptlrpc_sec_policy *policy; |
| 1276 | struct ptlrpc_sec *sec; |
| 1277 | char str[32]; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1278 | |
| 1279 | if (svc_ctx) { |
| 1280 | LASSERT(imp->imp_dlm_fake == 1); |
| 1281 | |
| 1282 | CDEBUG(D_SEC, "%s %s: reverse sec using flavor %s\n", |
| 1283 | imp->imp_obd->obd_type->typ_name, |
| 1284 | imp->imp_obd->obd_name, |
| 1285 | sptlrpc_flavor2name(sf, str, sizeof(str))); |
| 1286 | |
| 1287 | policy = sptlrpc_policy_get(svc_ctx->sc_policy); |
| 1288 | sf->sf_flags |= PTLRPC_SEC_FL_REVERSE | PTLRPC_SEC_FL_ROOTONLY; |
| 1289 | } else { |
| 1290 | LASSERT(imp->imp_dlm_fake == 0); |
| 1291 | |
| 1292 | CDEBUG(D_SEC, "%s %s: select security flavor %s\n", |
| 1293 | imp->imp_obd->obd_type->typ_name, |
| 1294 | imp->imp_obd->obd_name, |
| 1295 | sptlrpc_flavor2name(sf, str, sizeof(str))); |
| 1296 | |
| 1297 | policy = sptlrpc_wireflavor2policy(sf->sf_rpc); |
| 1298 | if (!policy) { |
| 1299 | CERROR("invalid flavor 0x%x\n", sf->sf_rpc); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1300 | return NULL; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | sec = policy->sp_cops->create_sec(imp, svc_ctx, sf); |
| 1305 | if (sec) { |
| 1306 | atomic_inc(&sec->ps_refcount); |
| 1307 | |
| 1308 | sec->ps_part = sp; |
| 1309 | |
| 1310 | if (sec->ps_gc_interval && policy->sp_cops->gc_ctx) |
| 1311 | sptlrpc_gc_add_sec(sec); |
| 1312 | } else { |
| 1313 | sptlrpc_policy_put(policy); |
| 1314 | } |
| 1315 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1316 | return sec; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1317 | } |
| 1318 | |
| 1319 | struct ptlrpc_sec *sptlrpc_import_sec_ref(struct obd_import *imp) |
| 1320 | { |
| 1321 | struct ptlrpc_sec *sec; |
| 1322 | |
| 1323 | spin_lock(&imp->imp_lock); |
| 1324 | sec = sptlrpc_sec_get(imp->imp_sec); |
| 1325 | spin_unlock(&imp->imp_lock); |
| 1326 | |
| 1327 | return sec; |
| 1328 | } |
| 1329 | EXPORT_SYMBOL(sptlrpc_import_sec_ref); |
| 1330 | |
| 1331 | static void sptlrpc_import_sec_install(struct obd_import *imp, |
| 1332 | struct ptlrpc_sec *sec) |
| 1333 | { |
| 1334 | struct ptlrpc_sec *old_sec; |
| 1335 | |
| 1336 | LASSERT_ATOMIC_POS(&sec->ps_refcount); |
| 1337 | |
| 1338 | spin_lock(&imp->imp_lock); |
| 1339 | old_sec = imp->imp_sec; |
| 1340 | imp->imp_sec = sec; |
| 1341 | spin_unlock(&imp->imp_lock); |
| 1342 | |
| 1343 | if (old_sec) { |
| 1344 | sptlrpc_sec_kill(old_sec); |
| 1345 | |
| 1346 | /* balance the ref taken by this import */ |
| 1347 | sptlrpc_sec_put(old_sec); |
| 1348 | } |
| 1349 | } |
| 1350 | |
| 1351 | static inline |
| 1352 | int flavor_equal(struct sptlrpc_flavor *sf1, struct sptlrpc_flavor *sf2) |
| 1353 | { |
| 1354 | return (memcmp(sf1, sf2, sizeof(*sf1)) == 0); |
| 1355 | } |
| 1356 | |
| 1357 | static inline |
| 1358 | void flavor_copy(struct sptlrpc_flavor *dst, struct sptlrpc_flavor *src) |
| 1359 | { |
| 1360 | *dst = *src; |
| 1361 | } |
| 1362 | |
| 1363 | static void sptlrpc_import_sec_adapt_inplace(struct obd_import *imp, |
| 1364 | struct ptlrpc_sec *sec, |
| 1365 | struct sptlrpc_flavor *sf) |
| 1366 | { |
| 1367 | char str1[32], str2[32]; |
| 1368 | |
| 1369 | if (sec->ps_flvr.sf_flags != sf->sf_flags) |
| 1370 | CDEBUG(D_SEC, "changing sec flags: %s -> %s\n", |
| 1371 | sptlrpc_secflags2str(sec->ps_flvr.sf_flags, |
| 1372 | str1, sizeof(str1)), |
| 1373 | sptlrpc_secflags2str(sf->sf_flags, |
| 1374 | str2, sizeof(str2))); |
| 1375 | |
| 1376 | spin_lock(&sec->ps_lock); |
| 1377 | flavor_copy(&sec->ps_flvr, sf); |
| 1378 | spin_unlock(&sec->ps_lock); |
| 1379 | } |
| 1380 | |
| 1381 | /** |
| 1382 | * To get an appropriate ptlrpc_sec for the \a imp, according to the current |
| 1383 | * configuration. Upon called, imp->imp_sec may or may not be NULL. |
| 1384 | * |
| 1385 | * - regular import: \a svc_ctx should be NULL and \a flvr is ignored; |
| 1386 | * - reverse import: \a svc_ctx and \a flvr are obtained from incoming request. |
| 1387 | */ |
| 1388 | int sptlrpc_import_sec_adapt(struct obd_import *imp, |
| 1389 | struct ptlrpc_svc_ctx *svc_ctx, |
| 1390 | struct sptlrpc_flavor *flvr) |
| 1391 | { |
| 1392 | struct ptlrpc_connection *conn; |
| 1393 | struct sptlrpc_flavor sf; |
| 1394 | struct ptlrpc_sec *sec, *newsec; |
| 1395 | enum lustre_sec_part sp; |
| 1396 | char str[24]; |
| 1397 | int rc = 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1398 | |
| 1399 | might_sleep(); |
| 1400 | |
| 1401 | if (imp == NULL) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1402 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1403 | |
| 1404 | conn = imp->imp_connection; |
| 1405 | |
| 1406 | if (svc_ctx == NULL) { |
| 1407 | struct client_obd *cliobd = &imp->imp_obd->u.cli; |
| 1408 | /* |
| 1409 | * normal import, determine flavor from rule set, except |
| 1410 | * for mgc the flavor is predetermined. |
| 1411 | */ |
| 1412 | if (cliobd->cl_sp_me == LUSTRE_SP_MGC) |
| 1413 | sf = cliobd->cl_flvr_mgc; |
| 1414 | else |
| 1415 | sptlrpc_conf_choose_flavor(cliobd->cl_sp_me, |
| 1416 | cliobd->cl_sp_to, |
| 1417 | &cliobd->cl_target_uuid, |
| 1418 | conn->c_self, &sf); |
| 1419 | |
| 1420 | sp = imp->imp_obd->u.cli.cl_sp_me; |
| 1421 | } else { |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 1422 | /* reverse import, determine flavor from incoming request */ |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1423 | sf = *flvr; |
| 1424 | |
| 1425 | if (sf.sf_rpc != SPTLRPC_FLVR_NULL) |
| 1426 | sf.sf_flags = PTLRPC_SEC_FL_REVERSE | |
| 1427 | PTLRPC_SEC_FL_ROOTONLY; |
| 1428 | |
| 1429 | sp = sptlrpc_target_sec_part(imp->imp_obd); |
| 1430 | } |
| 1431 | |
| 1432 | sec = sptlrpc_import_sec_ref(imp); |
| 1433 | if (sec) { |
| 1434 | char str2[24]; |
| 1435 | |
| 1436 | if (flavor_equal(&sf, &sec->ps_flvr)) |
| 1437 | GOTO(out, rc); |
| 1438 | |
| 1439 | CDEBUG(D_SEC, "import %s->%s: changing flavor %s -> %s\n", |
| 1440 | imp->imp_obd->obd_name, |
| 1441 | obd_uuid2str(&conn->c_remote_uuid), |
| 1442 | sptlrpc_flavor2name(&sec->ps_flvr, str, sizeof(str)), |
| 1443 | sptlrpc_flavor2name(&sf, str2, sizeof(str2))); |
| 1444 | |
| 1445 | if (SPTLRPC_FLVR_POLICY(sf.sf_rpc) == |
| 1446 | SPTLRPC_FLVR_POLICY(sec->ps_flvr.sf_rpc) && |
| 1447 | SPTLRPC_FLVR_MECH(sf.sf_rpc) == |
| 1448 | SPTLRPC_FLVR_MECH(sec->ps_flvr.sf_rpc)) { |
| 1449 | sptlrpc_import_sec_adapt_inplace(imp, sec, &sf); |
| 1450 | GOTO(out, rc); |
| 1451 | } |
| 1452 | } else if (SPTLRPC_FLVR_BASE(sf.sf_rpc) != |
| 1453 | SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) { |
| 1454 | CDEBUG(D_SEC, "import %s->%s netid %x: select flavor %s\n", |
| 1455 | imp->imp_obd->obd_name, |
| 1456 | obd_uuid2str(&conn->c_remote_uuid), |
| 1457 | LNET_NIDNET(conn->c_self), |
| 1458 | sptlrpc_flavor2name(&sf, str, sizeof(str))); |
| 1459 | } |
| 1460 | |
| 1461 | mutex_lock(&imp->imp_sec_mutex); |
| 1462 | |
| 1463 | newsec = sptlrpc_sec_create(imp, svc_ctx, &sf, sp); |
| 1464 | if (newsec) { |
| 1465 | sptlrpc_import_sec_install(imp, newsec); |
| 1466 | } else { |
| 1467 | CERROR("import %s->%s: failed to create new sec\n", |
| 1468 | imp->imp_obd->obd_name, |
| 1469 | obd_uuid2str(&conn->c_remote_uuid)); |
| 1470 | rc = -EPERM; |
| 1471 | } |
| 1472 | |
| 1473 | mutex_unlock(&imp->imp_sec_mutex); |
| 1474 | out: |
| 1475 | sptlrpc_sec_put(sec); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1476 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1477 | } |
| 1478 | |
| 1479 | void sptlrpc_import_sec_put(struct obd_import *imp) |
| 1480 | { |
| 1481 | if (imp->imp_sec) { |
| 1482 | sptlrpc_sec_kill(imp->imp_sec); |
| 1483 | |
| 1484 | sptlrpc_sec_put(imp->imp_sec); |
| 1485 | imp->imp_sec = NULL; |
| 1486 | } |
| 1487 | } |
| 1488 | |
| 1489 | static void import_flush_ctx_common(struct obd_import *imp, |
| 1490 | uid_t uid, int grace, int force) |
| 1491 | { |
| 1492 | struct ptlrpc_sec *sec; |
| 1493 | |
| 1494 | if (imp == NULL) |
| 1495 | return; |
| 1496 | |
| 1497 | sec = sptlrpc_import_sec_ref(imp); |
| 1498 | if (sec == NULL) |
| 1499 | return; |
| 1500 | |
| 1501 | sec_cop_flush_ctx_cache(sec, uid, grace, force); |
| 1502 | sptlrpc_sec_put(sec); |
| 1503 | } |
| 1504 | |
| 1505 | void sptlrpc_import_flush_root_ctx(struct obd_import *imp) |
| 1506 | { |
| 1507 | /* it's important to use grace mode, see explain in |
| 1508 | * sptlrpc_req_refresh_ctx() */ |
| 1509 | import_flush_ctx_common(imp, 0, 1, 1); |
| 1510 | } |
| 1511 | |
| 1512 | void sptlrpc_import_flush_my_ctx(struct obd_import *imp) |
| 1513 | { |
Peng Tao | 4b1a25f | 2013-07-15 22:27:14 +0800 | [diff] [blame] | 1514 | import_flush_ctx_common(imp, from_kuid(&init_user_ns, current_uid()), |
| 1515 | 1, 1); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1516 | } |
| 1517 | EXPORT_SYMBOL(sptlrpc_import_flush_my_ctx); |
| 1518 | |
| 1519 | void sptlrpc_import_flush_all_ctx(struct obd_import *imp) |
| 1520 | { |
| 1521 | import_flush_ctx_common(imp, -1, 1, 1); |
| 1522 | } |
| 1523 | EXPORT_SYMBOL(sptlrpc_import_flush_all_ctx); |
| 1524 | |
| 1525 | /** |
| 1526 | * Used by ptlrpc client to allocate request buffer of \a req. Upon return |
| 1527 | * successfully, req->rq_reqmsg points to a buffer with size \a msgsize. |
| 1528 | */ |
| 1529 | int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize) |
| 1530 | { |
| 1531 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 1532 | struct ptlrpc_sec_policy *policy; |
| 1533 | int rc; |
| 1534 | |
| 1535 | LASSERT(ctx); |
| 1536 | LASSERT(ctx->cc_sec); |
| 1537 | LASSERT(ctx->cc_sec->ps_policy); |
| 1538 | LASSERT(req->rq_reqmsg == NULL); |
| 1539 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); |
| 1540 | |
| 1541 | policy = ctx->cc_sec->ps_policy; |
| 1542 | rc = policy->sp_cops->alloc_reqbuf(ctx->cc_sec, req, msgsize); |
| 1543 | if (!rc) { |
| 1544 | LASSERT(req->rq_reqmsg); |
| 1545 | LASSERT(req->rq_reqbuf || req->rq_clrbuf); |
| 1546 | |
| 1547 | /* zeroing preallocated buffer */ |
| 1548 | if (req->rq_pool) |
| 1549 | memset(req->rq_reqmsg, 0, msgsize); |
| 1550 | } |
| 1551 | |
| 1552 | return rc; |
| 1553 | } |
| 1554 | |
| 1555 | /** |
| 1556 | * Used by ptlrpc client to free request buffer of \a req. After this |
| 1557 | * req->rq_reqmsg is set to NULL and should not be accessed anymore. |
| 1558 | */ |
| 1559 | void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req) |
| 1560 | { |
| 1561 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 1562 | struct ptlrpc_sec_policy *policy; |
| 1563 | |
| 1564 | LASSERT(ctx); |
| 1565 | LASSERT(ctx->cc_sec); |
| 1566 | LASSERT(ctx->cc_sec->ps_policy); |
| 1567 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); |
| 1568 | |
| 1569 | if (req->rq_reqbuf == NULL && req->rq_clrbuf == NULL) |
| 1570 | return; |
| 1571 | |
| 1572 | policy = ctx->cc_sec->ps_policy; |
| 1573 | policy->sp_cops->free_reqbuf(ctx->cc_sec, req); |
| 1574 | req->rq_reqmsg = NULL; |
| 1575 | } |
| 1576 | |
| 1577 | /* |
| 1578 | * NOTE caller must guarantee the buffer size is enough for the enlargement |
| 1579 | */ |
| 1580 | void _sptlrpc_enlarge_msg_inplace(struct lustre_msg *msg, |
| 1581 | int segment, int newsize) |
| 1582 | { |
| 1583 | void *src, *dst; |
| 1584 | int oldsize, oldmsg_size, movesize; |
| 1585 | |
| 1586 | LASSERT(segment < msg->lm_bufcount); |
| 1587 | LASSERT(msg->lm_buflens[segment] <= newsize); |
| 1588 | |
| 1589 | if (msg->lm_buflens[segment] == newsize) |
| 1590 | return; |
| 1591 | |
| 1592 | /* nothing to do if we are enlarging the last segment */ |
| 1593 | if (segment == msg->lm_bufcount - 1) { |
| 1594 | msg->lm_buflens[segment] = newsize; |
| 1595 | return; |
| 1596 | } |
| 1597 | |
| 1598 | oldsize = msg->lm_buflens[segment]; |
| 1599 | |
| 1600 | src = lustre_msg_buf(msg, segment + 1, 0); |
| 1601 | msg->lm_buflens[segment] = newsize; |
| 1602 | dst = lustre_msg_buf(msg, segment + 1, 0); |
| 1603 | msg->lm_buflens[segment] = oldsize; |
| 1604 | |
| 1605 | /* move from segment + 1 to end segment */ |
| 1606 | LASSERT(msg->lm_magic == LUSTRE_MSG_MAGIC_V2); |
| 1607 | oldmsg_size = lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens); |
| 1608 | movesize = oldmsg_size - ((unsigned long) src - (unsigned long) msg); |
| 1609 | LASSERT(movesize >= 0); |
| 1610 | |
| 1611 | if (movesize) |
| 1612 | memmove(dst, src, movesize); |
| 1613 | |
| 1614 | /* note we don't clear the ares where old data live, not secret */ |
| 1615 | |
| 1616 | /* finally set new segment size */ |
| 1617 | msg->lm_buflens[segment] = newsize; |
| 1618 | } |
| 1619 | EXPORT_SYMBOL(_sptlrpc_enlarge_msg_inplace); |
| 1620 | |
| 1621 | /** |
| 1622 | * Used by ptlrpc client to enlarge the \a segment of request message pointed |
| 1623 | * by req->rq_reqmsg to size \a newsize, all previously filled-in data will be |
| 1624 | * preserved after the enlargement. this must be called after original request |
| 1625 | * buffer being allocated. |
| 1626 | * |
| 1627 | * \note after this be called, rq_reqmsg and rq_reqlen might have been changed, |
| 1628 | * so caller should refresh its local pointers if needed. |
| 1629 | */ |
| 1630 | int sptlrpc_cli_enlarge_reqbuf(struct ptlrpc_request *req, |
| 1631 | int segment, int newsize) |
| 1632 | { |
| 1633 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 1634 | struct ptlrpc_sec_cops *cops; |
| 1635 | struct lustre_msg *msg = req->rq_reqmsg; |
| 1636 | |
| 1637 | LASSERT(ctx); |
| 1638 | LASSERT(msg); |
| 1639 | LASSERT(msg->lm_bufcount > segment); |
| 1640 | LASSERT(msg->lm_buflens[segment] <= newsize); |
| 1641 | |
| 1642 | if (msg->lm_buflens[segment] == newsize) |
| 1643 | return 0; |
| 1644 | |
| 1645 | cops = ctx->cc_sec->ps_policy->sp_cops; |
| 1646 | LASSERT(cops->enlarge_reqbuf); |
| 1647 | return cops->enlarge_reqbuf(ctx->cc_sec, req, segment, newsize); |
| 1648 | } |
| 1649 | EXPORT_SYMBOL(sptlrpc_cli_enlarge_reqbuf); |
| 1650 | |
| 1651 | /** |
| 1652 | * Used by ptlrpc client to allocate reply buffer of \a req. |
| 1653 | * |
| 1654 | * \note After this, req->rq_repmsg is still not accessible. |
| 1655 | */ |
| 1656 | int sptlrpc_cli_alloc_repbuf(struct ptlrpc_request *req, int msgsize) |
| 1657 | { |
| 1658 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 1659 | struct ptlrpc_sec_policy *policy; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1660 | |
| 1661 | LASSERT(ctx); |
| 1662 | LASSERT(ctx->cc_sec); |
| 1663 | LASSERT(ctx->cc_sec->ps_policy); |
| 1664 | |
| 1665 | if (req->rq_repbuf) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1666 | return 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1667 | |
| 1668 | policy = ctx->cc_sec->ps_policy; |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 1669 | return policy->sp_cops->alloc_repbuf(ctx->cc_sec, req, msgsize); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1670 | } |
| 1671 | |
| 1672 | /** |
| 1673 | * Used by ptlrpc client to free reply buffer of \a req. After this |
| 1674 | * req->rq_repmsg is set to NULL and should not be accessed anymore. |
| 1675 | */ |
| 1676 | void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req) |
| 1677 | { |
| 1678 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
| 1679 | struct ptlrpc_sec_policy *policy; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1680 | |
| 1681 | LASSERT(ctx); |
| 1682 | LASSERT(ctx->cc_sec); |
| 1683 | LASSERT(ctx->cc_sec->ps_policy); |
| 1684 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); |
| 1685 | |
| 1686 | if (req->rq_repbuf == NULL) |
| 1687 | return; |
| 1688 | LASSERT(req->rq_repbuf_len); |
| 1689 | |
| 1690 | policy = ctx->cc_sec->ps_policy; |
| 1691 | policy->sp_cops->free_repbuf(ctx->cc_sec, req); |
| 1692 | req->rq_repmsg = NULL; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1693 | } |
| 1694 | |
| 1695 | int sptlrpc_cli_install_rvs_ctx(struct obd_import *imp, |
| 1696 | struct ptlrpc_cli_ctx *ctx) |
| 1697 | { |
| 1698 | struct ptlrpc_sec_policy *policy = ctx->cc_sec->ps_policy; |
| 1699 | |
| 1700 | if (!policy->sp_cops->install_rctx) |
| 1701 | return 0; |
| 1702 | return policy->sp_cops->install_rctx(imp, ctx->cc_sec, ctx); |
| 1703 | } |
| 1704 | |
| 1705 | int sptlrpc_svc_install_rvs_ctx(struct obd_import *imp, |
| 1706 | struct ptlrpc_svc_ctx *ctx) |
| 1707 | { |
| 1708 | struct ptlrpc_sec_policy *policy = ctx->sc_policy; |
| 1709 | |
| 1710 | if (!policy->sp_sops->install_rctx) |
| 1711 | return 0; |
| 1712 | return policy->sp_sops->install_rctx(imp, ctx); |
| 1713 | } |
| 1714 | |
| 1715 | /**************************************** |
| 1716 | * server side security * |
| 1717 | ****************************************/ |
| 1718 | |
| 1719 | static int flavor_allowed(struct sptlrpc_flavor *exp, |
| 1720 | struct ptlrpc_request *req) |
| 1721 | { |
| 1722 | struct sptlrpc_flavor *flvr = &req->rq_flvr; |
| 1723 | |
| 1724 | if (exp->sf_rpc == SPTLRPC_FLVR_ANY || exp->sf_rpc == flvr->sf_rpc) |
| 1725 | return 1; |
| 1726 | |
| 1727 | if ((req->rq_ctx_init || req->rq_ctx_fini) && |
| 1728 | SPTLRPC_FLVR_POLICY(exp->sf_rpc) == |
| 1729 | SPTLRPC_FLVR_POLICY(flvr->sf_rpc) && |
| 1730 | SPTLRPC_FLVR_MECH(exp->sf_rpc) == SPTLRPC_FLVR_MECH(flvr->sf_rpc)) |
| 1731 | return 1; |
| 1732 | |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | #define EXP_FLVR_UPDATE_EXPIRE (OBD_TIMEOUT_DEFAULT + 10) |
| 1737 | |
| 1738 | /** |
| 1739 | * Given an export \a exp, check whether the flavor of incoming \a req |
| 1740 | * is allowed by the export \a exp. Main logic is about taking care of |
| 1741 | * changing configurations. Return 0 means success. |
| 1742 | */ |
| 1743 | int sptlrpc_target_export_check(struct obd_export *exp, |
| 1744 | struct ptlrpc_request *req) |
| 1745 | { |
| 1746 | struct sptlrpc_flavor flavor; |
| 1747 | |
| 1748 | if (exp == NULL) |
| 1749 | return 0; |
| 1750 | |
| 1751 | /* client side export has no imp_reverse, skip |
| 1752 | * FIXME maybe we should check flavor this as well??? */ |
| 1753 | if (exp->exp_imp_reverse == NULL) |
| 1754 | return 0; |
| 1755 | |
| 1756 | /* don't care about ctx fini rpc */ |
| 1757 | if (req->rq_ctx_fini) |
| 1758 | return 0; |
| 1759 | |
| 1760 | spin_lock(&exp->exp_lock); |
| 1761 | |
| 1762 | /* if flavor just changed (exp->exp_flvr_changed != 0), we wait for |
| 1763 | * the first req with the new flavor, then treat it as current flavor, |
| 1764 | * adapt reverse sec according to it. |
| 1765 | * note the first rpc with new flavor might not be with root ctx, in |
| 1766 | * which case delay the sec_adapt by leaving exp_flvr_adapt == 1. */ |
| 1767 | if (unlikely(exp->exp_flvr_changed) && |
| 1768 | flavor_allowed(&exp->exp_flvr_old[1], req)) { |
| 1769 | /* make the new flavor as "current", and old ones as |
| 1770 | * about-to-expire */ |
| 1771 | CDEBUG(D_SEC, "exp %p: just changed: %x->%x\n", exp, |
| 1772 | exp->exp_flvr.sf_rpc, exp->exp_flvr_old[1].sf_rpc); |
| 1773 | flavor = exp->exp_flvr_old[1]; |
| 1774 | exp->exp_flvr_old[1] = exp->exp_flvr_old[0]; |
| 1775 | exp->exp_flvr_expire[1] = exp->exp_flvr_expire[0]; |
| 1776 | exp->exp_flvr_old[0] = exp->exp_flvr; |
| 1777 | exp->exp_flvr_expire[0] = cfs_time_current_sec() + |
| 1778 | EXP_FLVR_UPDATE_EXPIRE; |
| 1779 | exp->exp_flvr = flavor; |
| 1780 | |
| 1781 | /* flavor change finished */ |
| 1782 | exp->exp_flvr_changed = 0; |
| 1783 | LASSERT(exp->exp_flvr_adapt == 1); |
| 1784 | |
| 1785 | /* if it's gss, we only interested in root ctx init */ |
| 1786 | if (req->rq_auth_gss && |
| 1787 | !(req->rq_ctx_init && |
| 1788 | (req->rq_auth_usr_root || req->rq_auth_usr_mdt || |
| 1789 | req->rq_auth_usr_ost))) { |
| 1790 | spin_unlock(&exp->exp_lock); |
| 1791 | CDEBUG(D_SEC, "is good but not root(%d:%d:%d:%d:%d)\n", |
| 1792 | req->rq_auth_gss, req->rq_ctx_init, |
| 1793 | req->rq_auth_usr_root, req->rq_auth_usr_mdt, |
| 1794 | req->rq_auth_usr_ost); |
| 1795 | return 0; |
| 1796 | } |
| 1797 | |
| 1798 | exp->exp_flvr_adapt = 0; |
| 1799 | spin_unlock(&exp->exp_lock); |
| 1800 | |
| 1801 | return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, |
| 1802 | req->rq_svc_ctx, &flavor); |
| 1803 | } |
| 1804 | |
| 1805 | /* if it equals to the current flavor, we accept it, but need to |
| 1806 | * dealing with reverse sec/ctx */ |
| 1807 | if (likely(flavor_allowed(&exp->exp_flvr, req))) { |
| 1808 | /* most cases should return here, we only interested in |
| 1809 | * gss root ctx init */ |
| 1810 | if (!req->rq_auth_gss || !req->rq_ctx_init || |
| 1811 | (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt && |
| 1812 | !req->rq_auth_usr_ost)) { |
| 1813 | spin_unlock(&exp->exp_lock); |
| 1814 | return 0; |
| 1815 | } |
| 1816 | |
| 1817 | /* if flavor just changed, we should not proceed, just leave |
| 1818 | * it and current flavor will be discovered and replaced |
| 1819 | * shortly, and let _this_ rpc pass through */ |
| 1820 | if (exp->exp_flvr_changed) { |
| 1821 | LASSERT(exp->exp_flvr_adapt); |
| 1822 | spin_unlock(&exp->exp_lock); |
| 1823 | return 0; |
| 1824 | } |
| 1825 | |
| 1826 | if (exp->exp_flvr_adapt) { |
| 1827 | exp->exp_flvr_adapt = 0; |
| 1828 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): do delayed adapt\n", |
| 1829 | exp, exp->exp_flvr.sf_rpc, |
| 1830 | exp->exp_flvr_old[0].sf_rpc, |
| 1831 | exp->exp_flvr_old[1].sf_rpc); |
| 1832 | flavor = exp->exp_flvr; |
| 1833 | spin_unlock(&exp->exp_lock); |
| 1834 | |
| 1835 | return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, |
| 1836 | req->rq_svc_ctx, |
| 1837 | &flavor); |
| 1838 | } else { |
| 1839 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): is current flavor, " |
| 1840 | "install rvs ctx\n", exp, exp->exp_flvr.sf_rpc, |
| 1841 | exp->exp_flvr_old[0].sf_rpc, |
| 1842 | exp->exp_flvr_old[1].sf_rpc); |
| 1843 | spin_unlock(&exp->exp_lock); |
| 1844 | |
| 1845 | return sptlrpc_svc_install_rvs_ctx(exp->exp_imp_reverse, |
| 1846 | req->rq_svc_ctx); |
| 1847 | } |
| 1848 | } |
| 1849 | |
| 1850 | if (exp->exp_flvr_expire[0]) { |
| 1851 | if (exp->exp_flvr_expire[0] >= cfs_time_current_sec()) { |
| 1852 | if (flavor_allowed(&exp->exp_flvr_old[0], req)) { |
| 1853 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the " |
| 1854 | "middle one ("CFS_DURATION_T")\n", exp, |
| 1855 | exp->exp_flvr.sf_rpc, |
| 1856 | exp->exp_flvr_old[0].sf_rpc, |
| 1857 | exp->exp_flvr_old[1].sf_rpc, |
| 1858 | exp->exp_flvr_expire[0] - |
| 1859 | cfs_time_current_sec()); |
| 1860 | spin_unlock(&exp->exp_lock); |
| 1861 | return 0; |
| 1862 | } |
| 1863 | } else { |
| 1864 | CDEBUG(D_SEC, "mark middle expired\n"); |
| 1865 | exp->exp_flvr_expire[0] = 0; |
| 1866 | } |
| 1867 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match middle\n", exp, |
| 1868 | exp->exp_flvr.sf_rpc, |
| 1869 | exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, |
| 1870 | req->rq_flvr.sf_rpc); |
| 1871 | } |
| 1872 | |
| 1873 | /* now it doesn't match the current flavor, the only chance we can |
| 1874 | * accept it is match the old flavors which is not expired. */ |
| 1875 | if (exp->exp_flvr_changed == 0 && exp->exp_flvr_expire[1]) { |
| 1876 | if (exp->exp_flvr_expire[1] >= cfs_time_current_sec()) { |
| 1877 | if (flavor_allowed(&exp->exp_flvr_old[1], req)) { |
| 1878 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the " |
| 1879 | "oldest one ("CFS_DURATION_T")\n", exp, |
| 1880 | exp->exp_flvr.sf_rpc, |
| 1881 | exp->exp_flvr_old[0].sf_rpc, |
| 1882 | exp->exp_flvr_old[1].sf_rpc, |
| 1883 | exp->exp_flvr_expire[1] - |
| 1884 | cfs_time_current_sec()); |
| 1885 | spin_unlock(&exp->exp_lock); |
| 1886 | return 0; |
| 1887 | } |
| 1888 | } else { |
| 1889 | CDEBUG(D_SEC, "mark oldest expired\n"); |
| 1890 | exp->exp_flvr_expire[1] = 0; |
| 1891 | } |
| 1892 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match found\n", |
| 1893 | exp, exp->exp_flvr.sf_rpc, |
| 1894 | exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, |
| 1895 | req->rq_flvr.sf_rpc); |
| 1896 | } else { |
| 1897 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): skip the last one\n", |
| 1898 | exp, exp->exp_flvr.sf_rpc, exp->exp_flvr_old[0].sf_rpc, |
| 1899 | exp->exp_flvr_old[1].sf_rpc); |
| 1900 | } |
| 1901 | |
| 1902 | spin_unlock(&exp->exp_lock); |
| 1903 | |
| 1904 | CWARN("exp %p(%s): req %p (%u|%u|%u|%u|%u|%u) with " |
| 1905 | "unauthorized flavor %x, expect %x|%x(%+ld)|%x(%+ld)\n", |
| 1906 | exp, exp->exp_obd->obd_name, |
| 1907 | req, req->rq_auth_gss, req->rq_ctx_init, req->rq_ctx_fini, |
| 1908 | req->rq_auth_usr_root, req->rq_auth_usr_mdt, req->rq_auth_usr_ost, |
| 1909 | req->rq_flvr.sf_rpc, |
| 1910 | exp->exp_flvr.sf_rpc, |
| 1911 | exp->exp_flvr_old[0].sf_rpc, |
| 1912 | exp->exp_flvr_expire[0] ? |
| 1913 | (unsigned long) (exp->exp_flvr_expire[0] - |
| 1914 | cfs_time_current_sec()) : 0, |
| 1915 | exp->exp_flvr_old[1].sf_rpc, |
| 1916 | exp->exp_flvr_expire[1] ? |
| 1917 | (unsigned long) (exp->exp_flvr_expire[1] - |
| 1918 | cfs_time_current_sec()) : 0); |
| 1919 | return -EACCES; |
| 1920 | } |
| 1921 | EXPORT_SYMBOL(sptlrpc_target_export_check); |
| 1922 | |
| 1923 | void sptlrpc_target_update_exp_flavor(struct obd_device *obd, |
| 1924 | struct sptlrpc_rule_set *rset) |
| 1925 | { |
| 1926 | struct obd_export *exp; |
| 1927 | struct sptlrpc_flavor new_flvr; |
| 1928 | |
| 1929 | LASSERT(obd); |
| 1930 | |
| 1931 | spin_lock(&obd->obd_dev_lock); |
| 1932 | |
| 1933 | list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) { |
| 1934 | if (exp->exp_connection == NULL) |
| 1935 | continue; |
| 1936 | |
| 1937 | /* note if this export had just been updated flavor |
| 1938 | * (exp_flvr_changed == 1), this will override the |
| 1939 | * previous one. */ |
| 1940 | spin_lock(&exp->exp_lock); |
| 1941 | sptlrpc_target_choose_flavor(rset, exp->exp_sp_peer, |
| 1942 | exp->exp_connection->c_peer.nid, |
| 1943 | &new_flvr); |
| 1944 | if (exp->exp_flvr_changed || |
| 1945 | !flavor_equal(&new_flvr, &exp->exp_flvr)) { |
| 1946 | exp->exp_flvr_old[1] = new_flvr; |
| 1947 | exp->exp_flvr_expire[1] = 0; |
| 1948 | exp->exp_flvr_changed = 1; |
| 1949 | exp->exp_flvr_adapt = 1; |
| 1950 | |
| 1951 | CDEBUG(D_SEC, "exp %p (%s): updated flavor %x->%x\n", |
| 1952 | exp, sptlrpc_part2name(exp->exp_sp_peer), |
| 1953 | exp->exp_flvr.sf_rpc, |
| 1954 | exp->exp_flvr_old[1].sf_rpc); |
| 1955 | } |
| 1956 | spin_unlock(&exp->exp_lock); |
| 1957 | } |
| 1958 | |
| 1959 | spin_unlock(&obd->obd_dev_lock); |
| 1960 | } |
| 1961 | EXPORT_SYMBOL(sptlrpc_target_update_exp_flavor); |
| 1962 | |
| 1963 | static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc) |
| 1964 | { |
| 1965 | /* peer's claim is unreliable unless gss is being used */ |
| 1966 | if (!req->rq_auth_gss || svc_rc == SECSVC_DROP) |
| 1967 | return svc_rc; |
| 1968 | |
| 1969 | switch (req->rq_sp_from) { |
| 1970 | case LUSTRE_SP_CLI: |
| 1971 | if (req->rq_auth_usr_mdt || req->rq_auth_usr_ost) { |
| 1972 | DEBUG_REQ(D_ERROR, req, "faked source CLI"); |
| 1973 | svc_rc = SECSVC_DROP; |
| 1974 | } |
| 1975 | break; |
| 1976 | case LUSTRE_SP_MDT: |
| 1977 | if (!req->rq_auth_usr_mdt) { |
| 1978 | DEBUG_REQ(D_ERROR, req, "faked source MDT"); |
| 1979 | svc_rc = SECSVC_DROP; |
| 1980 | } |
| 1981 | break; |
| 1982 | case LUSTRE_SP_OST: |
| 1983 | if (!req->rq_auth_usr_ost) { |
| 1984 | DEBUG_REQ(D_ERROR, req, "faked source OST"); |
| 1985 | svc_rc = SECSVC_DROP; |
| 1986 | } |
| 1987 | break; |
| 1988 | case LUSTRE_SP_MGS: |
| 1989 | case LUSTRE_SP_MGC: |
| 1990 | if (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt && |
| 1991 | !req->rq_auth_usr_ost) { |
| 1992 | DEBUG_REQ(D_ERROR, req, "faked source MGC/MGS"); |
| 1993 | svc_rc = SECSVC_DROP; |
| 1994 | } |
| 1995 | break; |
| 1996 | case LUSTRE_SP_ANY: |
| 1997 | default: |
| 1998 | DEBUG_REQ(D_ERROR, req, "invalid source %u", req->rq_sp_from); |
| 1999 | svc_rc = SECSVC_DROP; |
| 2000 | } |
| 2001 | |
| 2002 | return svc_rc; |
| 2003 | } |
| 2004 | |
| 2005 | /** |
| 2006 | * Used by ptlrpc server, to perform transformation upon request message of |
| 2007 | * incoming \a req. This must be the first thing to do with a incoming |
| 2008 | * request in ptlrpc layer. |
| 2009 | * |
| 2010 | * \retval SECSVC_OK success, and req->rq_reqmsg point to request message in |
| 2011 | * clear text, size is req->rq_reqlen; also req->rq_svc_ctx is set. |
| 2012 | * \retval SECSVC_COMPLETE success, the request has been fully processed, and |
| 2013 | * reply message has been prepared. |
| 2014 | * \retval SECSVC_DROP failed, this request should be dropped. |
| 2015 | */ |
| 2016 | int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req) |
| 2017 | { |
| 2018 | struct ptlrpc_sec_policy *policy; |
| 2019 | struct lustre_msg *msg = req->rq_reqbuf; |
| 2020 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2021 | |
| 2022 | LASSERT(msg); |
| 2023 | LASSERT(req->rq_reqmsg == NULL); |
| 2024 | LASSERT(req->rq_repmsg == NULL); |
| 2025 | LASSERT(req->rq_svc_ctx == NULL); |
| 2026 | |
| 2027 | req->rq_req_swab_mask = 0; |
| 2028 | |
| 2029 | rc = __lustre_unpack_msg(msg, req->rq_reqdata_len); |
| 2030 | switch (rc) { |
| 2031 | case 1: |
| 2032 | lustre_set_req_swabbed(req, MSG_PTLRPC_HEADER_OFF); |
| 2033 | case 0: |
| 2034 | break; |
| 2035 | default: |
| 2036 | CERROR("error unpacking request from %s x"LPU64"\n", |
| 2037 | libcfs_id2str(req->rq_peer), req->rq_xid); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 2038 | return SECSVC_DROP; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2039 | } |
| 2040 | |
| 2041 | req->rq_flvr.sf_rpc = WIRE_FLVR(msg->lm_secflvr); |
| 2042 | req->rq_sp_from = LUSTRE_SP_ANY; |
Peng Tao | 4b1a25f | 2013-07-15 22:27:14 +0800 | [diff] [blame] | 2043 | req->rq_auth_uid = -1; |
| 2044 | req->rq_auth_mapped_uid = -1; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2045 | |
| 2046 | policy = sptlrpc_wireflavor2policy(req->rq_flvr.sf_rpc); |
| 2047 | if (!policy) { |
| 2048 | CERROR("unsupported rpc flavor %x\n", req->rq_flvr.sf_rpc); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 2049 | return SECSVC_DROP; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2050 | } |
| 2051 | |
| 2052 | LASSERT(policy->sp_sops->accept); |
| 2053 | rc = policy->sp_sops->accept(req); |
| 2054 | sptlrpc_policy_put(policy); |
| 2055 | LASSERT(req->rq_reqmsg || rc != SECSVC_OK); |
| 2056 | LASSERT(req->rq_svc_ctx || rc == SECSVC_DROP); |
| 2057 | |
| 2058 | /* |
| 2059 | * if it's not null flavor (which means embedded packing msg), |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 2060 | * reset the swab mask for the coming inner msg unpacking. |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2061 | */ |
| 2062 | if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL) |
| 2063 | req->rq_req_swab_mask = 0; |
| 2064 | |
| 2065 | /* sanity check for the request source */ |
| 2066 | rc = sptlrpc_svc_check_from(req, rc); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 2067 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2068 | } |
| 2069 | |
| 2070 | /** |
| 2071 | * Used by ptlrpc server, to allocate reply buffer for \a req. If succeed, |
| 2072 | * req->rq_reply_state is set, and req->rq_reply_state->rs_msg point to |
| 2073 | * a buffer of \a msglen size. |
| 2074 | */ |
| 2075 | int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen) |
| 2076 | { |
| 2077 | struct ptlrpc_sec_policy *policy; |
| 2078 | struct ptlrpc_reply_state *rs; |
| 2079 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2080 | |
| 2081 | LASSERT(req->rq_svc_ctx); |
| 2082 | LASSERT(req->rq_svc_ctx->sc_policy); |
| 2083 | |
| 2084 | policy = req->rq_svc_ctx->sc_policy; |
| 2085 | LASSERT(policy->sp_sops->alloc_rs); |
| 2086 | |
| 2087 | rc = policy->sp_sops->alloc_rs(req, msglen); |
| 2088 | if (unlikely(rc == -ENOMEM)) { |
| 2089 | /* failed alloc, try emergency pool */ |
| 2090 | rs = lustre_get_emerg_rs(req->rq_rqbd->rqbd_svcpt); |
| 2091 | if (rs == NULL) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 2092 | return -ENOMEM; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2093 | |
| 2094 | req->rq_reply_state = rs; |
| 2095 | rc = policy->sp_sops->alloc_rs(req, msglen); |
| 2096 | if (rc) { |
| 2097 | lustre_put_emerg_rs(rs); |
| 2098 | req->rq_reply_state = NULL; |
| 2099 | } |
| 2100 | } |
| 2101 | |
| 2102 | LASSERT(rc != 0 || |
| 2103 | (req->rq_reply_state && req->rq_reply_state->rs_msg)); |
| 2104 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 2105 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2106 | } |
| 2107 | |
| 2108 | /** |
| 2109 | * Used by ptlrpc server, to perform transformation upon reply message. |
| 2110 | * |
Masanari Iida | 0c2bc75 | 2014-02-08 00:30:37 +0900 | [diff] [blame] | 2111 | * \post req->rq_reply_off is set to appropriate server-controlled reply offset. |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2112 | * \post req->rq_repmsg and req->rq_reply_state->rs_msg becomes inaccessible. |
| 2113 | */ |
| 2114 | int sptlrpc_svc_wrap_reply(struct ptlrpc_request *req) |
| 2115 | { |
| 2116 | struct ptlrpc_sec_policy *policy; |
| 2117 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2118 | |
| 2119 | LASSERT(req->rq_svc_ctx); |
| 2120 | LASSERT(req->rq_svc_ctx->sc_policy); |
| 2121 | |
| 2122 | policy = req->rq_svc_ctx->sc_policy; |
| 2123 | LASSERT(policy->sp_sops->authorize); |
| 2124 | |
| 2125 | rc = policy->sp_sops->authorize(req); |
| 2126 | LASSERT(rc || req->rq_reply_state->rs_repdata_len); |
| 2127 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 2128 | return rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2129 | } |
| 2130 | |
| 2131 | /** |
| 2132 | * Used by ptlrpc server, to free reply_state. |
| 2133 | */ |
| 2134 | void sptlrpc_svc_free_rs(struct ptlrpc_reply_state *rs) |
| 2135 | { |
| 2136 | struct ptlrpc_sec_policy *policy; |
| 2137 | unsigned int prealloc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2138 | |
| 2139 | LASSERT(rs->rs_svc_ctx); |
| 2140 | LASSERT(rs->rs_svc_ctx->sc_policy); |
| 2141 | |
| 2142 | policy = rs->rs_svc_ctx->sc_policy; |
| 2143 | LASSERT(policy->sp_sops->free_rs); |
| 2144 | |
| 2145 | prealloc = rs->rs_prealloc; |
| 2146 | policy->sp_sops->free_rs(rs); |
| 2147 | |
| 2148 | if (prealloc) |
| 2149 | lustre_put_emerg_rs(rs); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2150 | } |
| 2151 | |
| 2152 | void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req) |
| 2153 | { |
| 2154 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; |
| 2155 | |
| 2156 | if (ctx != NULL) |
| 2157 | atomic_inc(&ctx->sc_refcount); |
| 2158 | } |
| 2159 | |
| 2160 | void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req) |
| 2161 | { |
| 2162 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; |
| 2163 | |
| 2164 | if (ctx == NULL) |
| 2165 | return; |
| 2166 | |
| 2167 | LASSERT_ATOMIC_POS(&ctx->sc_refcount); |
| 2168 | if (atomic_dec_and_test(&ctx->sc_refcount)) { |
| 2169 | if (ctx->sc_policy->sp_sops->free_ctx) |
| 2170 | ctx->sc_policy->sp_sops->free_ctx(ctx); |
| 2171 | } |
| 2172 | req->rq_svc_ctx = NULL; |
| 2173 | } |
| 2174 | |
| 2175 | void sptlrpc_svc_ctx_invalidate(struct ptlrpc_request *req) |
| 2176 | { |
| 2177 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; |
| 2178 | |
| 2179 | if (ctx == NULL) |
| 2180 | return; |
| 2181 | |
| 2182 | LASSERT_ATOMIC_POS(&ctx->sc_refcount); |
| 2183 | if (ctx->sc_policy->sp_sops->invalidate_ctx) |
| 2184 | ctx->sc_policy->sp_sops->invalidate_ctx(ctx); |
| 2185 | } |
| 2186 | EXPORT_SYMBOL(sptlrpc_svc_ctx_invalidate); |
| 2187 | |
| 2188 | /**************************************** |
| 2189 | * bulk security * |
| 2190 | ****************************************/ |
| 2191 | |
| 2192 | /** |
| 2193 | * Perform transformation upon bulk data pointed by \a desc. This is called |
| 2194 | * before transforming the request message. |
| 2195 | */ |
| 2196 | int sptlrpc_cli_wrap_bulk(struct ptlrpc_request *req, |
| 2197 | struct ptlrpc_bulk_desc *desc) |
| 2198 | { |
| 2199 | struct ptlrpc_cli_ctx *ctx; |
| 2200 | |
| 2201 | LASSERT(req->rq_bulk_read || req->rq_bulk_write); |
| 2202 | |
| 2203 | if (!req->rq_pack_bulk) |
| 2204 | return 0; |
| 2205 | |
| 2206 | ctx = req->rq_cli_ctx; |
| 2207 | if (ctx->cc_ops->wrap_bulk) |
| 2208 | return ctx->cc_ops->wrap_bulk(ctx, req, desc); |
| 2209 | return 0; |
| 2210 | } |
| 2211 | EXPORT_SYMBOL(sptlrpc_cli_wrap_bulk); |
| 2212 | |
| 2213 | /** |
| 2214 | * This is called after unwrap the reply message. |
| 2215 | * return nob of actual plain text size received, or error code. |
| 2216 | */ |
| 2217 | int sptlrpc_cli_unwrap_bulk_read(struct ptlrpc_request *req, |
| 2218 | struct ptlrpc_bulk_desc *desc, |
| 2219 | int nob) |
| 2220 | { |
| 2221 | struct ptlrpc_cli_ctx *ctx; |
| 2222 | int rc; |
| 2223 | |
| 2224 | LASSERT(req->rq_bulk_read && !req->rq_bulk_write); |
| 2225 | |
| 2226 | if (!req->rq_pack_bulk) |
| 2227 | return desc->bd_nob_transferred; |
| 2228 | |
| 2229 | ctx = req->rq_cli_ctx; |
| 2230 | if (ctx->cc_ops->unwrap_bulk) { |
| 2231 | rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); |
| 2232 | if (rc < 0) |
| 2233 | return rc; |
| 2234 | } |
| 2235 | return desc->bd_nob_transferred; |
| 2236 | } |
| 2237 | EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_read); |
| 2238 | |
| 2239 | /** |
| 2240 | * This is called after unwrap the reply message. |
| 2241 | * return 0 for success or error code. |
| 2242 | */ |
| 2243 | int sptlrpc_cli_unwrap_bulk_write(struct ptlrpc_request *req, |
| 2244 | struct ptlrpc_bulk_desc *desc) |
| 2245 | { |
| 2246 | struct ptlrpc_cli_ctx *ctx; |
| 2247 | int rc; |
| 2248 | |
| 2249 | LASSERT(!req->rq_bulk_read && req->rq_bulk_write); |
| 2250 | |
| 2251 | if (!req->rq_pack_bulk) |
| 2252 | return 0; |
| 2253 | |
| 2254 | ctx = req->rq_cli_ctx; |
| 2255 | if (ctx->cc_ops->unwrap_bulk) { |
| 2256 | rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); |
| 2257 | if (rc < 0) |
| 2258 | return rc; |
| 2259 | } |
| 2260 | |
| 2261 | /* |
| 2262 | * if everything is going right, nob should equals to nob_transferred. |
| 2263 | * in case of privacy mode, nob_transferred needs to be adjusted. |
| 2264 | */ |
| 2265 | if (desc->bd_nob != desc->bd_nob_transferred) { |
| 2266 | CERROR("nob %d doesn't match transferred nob %d", |
| 2267 | desc->bd_nob, desc->bd_nob_transferred); |
| 2268 | return -EPROTO; |
| 2269 | } |
| 2270 | |
| 2271 | return 0; |
| 2272 | } |
| 2273 | EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_write); |
| 2274 | |
| 2275 | |
| 2276 | /**************************************** |
| 2277 | * user descriptor helpers * |
| 2278 | ****************************************/ |
| 2279 | |
| 2280 | int sptlrpc_current_user_desc_size(void) |
| 2281 | { |
| 2282 | int ngroups; |
| 2283 | |
| 2284 | ngroups = current_ngroups; |
| 2285 | |
| 2286 | if (ngroups > LUSTRE_MAX_GROUPS) |
| 2287 | ngroups = LUSTRE_MAX_GROUPS; |
| 2288 | return sptlrpc_user_desc_size(ngroups); |
| 2289 | } |
| 2290 | EXPORT_SYMBOL(sptlrpc_current_user_desc_size); |
| 2291 | |
| 2292 | int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset) |
| 2293 | { |
| 2294 | struct ptlrpc_user_desc *pud; |
| 2295 | |
| 2296 | pud = lustre_msg_buf(msg, offset, 0); |
| 2297 | |
Peng Tao | 4b1a25f | 2013-07-15 22:27:14 +0800 | [diff] [blame] | 2298 | pud->pud_uid = from_kuid(&init_user_ns, current_uid()); |
| 2299 | pud->pud_gid = from_kgid(&init_user_ns, current_gid()); |
| 2300 | pud->pud_fsuid = from_kuid(&init_user_ns, current_fsuid()); |
| 2301 | pud->pud_fsgid = from_kgid(&init_user_ns, current_fsgid()); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 2302 | pud->pud_cap = cfs_curproc_cap_pack(); |
| 2303 | pud->pud_ngroups = (msg->lm_buflens[offset] - sizeof(*pud)) / 4; |
| 2304 | |
| 2305 | task_lock(current); |
| 2306 | if (pud->pud_ngroups > current_ngroups) |
| 2307 | pud->pud_ngroups = current_ngroups; |
| 2308 | memcpy(pud->pud_groups, current_cred()->group_info->blocks[0], |
| 2309 | pud->pud_ngroups * sizeof(__u32)); |
| 2310 | task_unlock(current); |
| 2311 | |
| 2312 | return 0; |
| 2313 | } |
| 2314 | EXPORT_SYMBOL(sptlrpc_pack_user_desc); |
| 2315 | |
| 2316 | int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset, int swabbed) |
| 2317 | { |
| 2318 | struct ptlrpc_user_desc *pud; |
| 2319 | int i; |
| 2320 | |
| 2321 | pud = lustre_msg_buf(msg, offset, sizeof(*pud)); |
| 2322 | if (!pud) |
| 2323 | return -EINVAL; |
| 2324 | |
| 2325 | if (swabbed) { |
| 2326 | __swab32s(&pud->pud_uid); |
| 2327 | __swab32s(&pud->pud_gid); |
| 2328 | __swab32s(&pud->pud_fsuid); |
| 2329 | __swab32s(&pud->pud_fsgid); |
| 2330 | __swab32s(&pud->pud_cap); |
| 2331 | __swab32s(&pud->pud_ngroups); |
| 2332 | } |
| 2333 | |
| 2334 | if (pud->pud_ngroups > LUSTRE_MAX_GROUPS) { |
| 2335 | CERROR("%u groups is too large\n", pud->pud_ngroups); |
| 2336 | return -EINVAL; |
| 2337 | } |
| 2338 | |
| 2339 | if (sizeof(*pud) + pud->pud_ngroups * sizeof(__u32) > |
| 2340 | msg->lm_buflens[offset]) { |
| 2341 | CERROR("%u groups are claimed but bufsize only %u\n", |
| 2342 | pud->pud_ngroups, msg->lm_buflens[offset]); |
| 2343 | return -EINVAL; |
| 2344 | } |
| 2345 | |
| 2346 | if (swabbed) { |
| 2347 | for (i = 0; i < pud->pud_ngroups; i++) |
| 2348 | __swab32s(&pud->pud_groups[i]); |
| 2349 | } |
| 2350 | |
| 2351 | return 0; |
| 2352 | } |
| 2353 | EXPORT_SYMBOL(sptlrpc_unpack_user_desc); |
| 2354 | |
| 2355 | /**************************************** |
| 2356 | * misc helpers * |
| 2357 | ****************************************/ |
| 2358 | |
| 2359 | const char * sec2target_str(struct ptlrpc_sec *sec) |
| 2360 | { |
| 2361 | if (!sec || !sec->ps_import || !sec->ps_import->imp_obd) |
| 2362 | return "*"; |
| 2363 | if (sec_is_reverse(sec)) |
| 2364 | return "c"; |
| 2365 | return obd_uuid2str(&sec->ps_import->imp_obd->u.cli.cl_target_uuid); |
| 2366 | } |
| 2367 | EXPORT_SYMBOL(sec2target_str); |
| 2368 | |
| 2369 | /* |
| 2370 | * return true if the bulk data is protected |
| 2371 | */ |
| 2372 | int sptlrpc_flavor_has_bulk(struct sptlrpc_flavor *flvr) |
| 2373 | { |
| 2374 | switch (SPTLRPC_FLVR_BULK_SVC(flvr->sf_rpc)) { |
| 2375 | case SPTLRPC_BULK_SVC_INTG: |
| 2376 | case SPTLRPC_BULK_SVC_PRIV: |
| 2377 | return 1; |
| 2378 | default: |
| 2379 | return 0; |
| 2380 | } |
| 2381 | } |
| 2382 | EXPORT_SYMBOL(sptlrpc_flavor_has_bulk); |
| 2383 | |
| 2384 | /**************************************** |
| 2385 | * crypto API helper/alloc blkciper * |
| 2386 | ****************************************/ |
| 2387 | |
| 2388 | /**************************************** |
| 2389 | * initialize/finalize * |
| 2390 | ****************************************/ |
| 2391 | |
| 2392 | int sptlrpc_init(void) |
| 2393 | { |
| 2394 | int rc; |
| 2395 | |
| 2396 | rwlock_init(&policy_lock); |
| 2397 | |
| 2398 | rc = sptlrpc_gc_init(); |
| 2399 | if (rc) |
| 2400 | goto out; |
| 2401 | |
| 2402 | rc = sptlrpc_conf_init(); |
| 2403 | if (rc) |
| 2404 | goto out_gc; |
| 2405 | |
| 2406 | rc = sptlrpc_enc_pool_init(); |
| 2407 | if (rc) |
| 2408 | goto out_conf; |
| 2409 | |
| 2410 | rc = sptlrpc_null_init(); |
| 2411 | if (rc) |
| 2412 | goto out_pool; |
| 2413 | |
| 2414 | rc = sptlrpc_plain_init(); |
| 2415 | if (rc) |
| 2416 | goto out_null; |
| 2417 | |
| 2418 | rc = sptlrpc_lproc_init(); |
| 2419 | if (rc) |
| 2420 | goto out_plain; |
| 2421 | |
| 2422 | return 0; |
| 2423 | |
| 2424 | out_plain: |
| 2425 | sptlrpc_plain_fini(); |
| 2426 | out_null: |
| 2427 | sptlrpc_null_fini(); |
| 2428 | out_pool: |
| 2429 | sptlrpc_enc_pool_fini(); |
| 2430 | out_conf: |
| 2431 | sptlrpc_conf_fini(); |
| 2432 | out_gc: |
| 2433 | sptlrpc_gc_fini(); |
| 2434 | out: |
| 2435 | return rc; |
| 2436 | } |
| 2437 | |
| 2438 | void sptlrpc_fini(void) |
| 2439 | { |
| 2440 | sptlrpc_lproc_fini(); |
| 2441 | sptlrpc_plain_fini(); |
| 2442 | sptlrpc_null_fini(); |
| 2443 | sptlrpc_enc_pool_fini(); |
| 2444 | sptlrpc_conf_fini(); |
| 2445 | sptlrpc_gc_fini(); |
| 2446 | } |