X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fptlrpc%2Fsec.c;h=bf7db85c7b6694d2f559fc6bad7195ffeeac7136;hp=7f49fd1525f3723532820e9c74b8629606814fa9;hb=1f0e2723f37eb86f3a88807d1200e78c10ab9565;hpb=6a5b0b1ce3bbf5be2a8babba8619b95346edb24f diff --git a/lustre/ptlrpc/sec.c b/lustre/ptlrpc/sec.c index 7f49fd1..bf7db85 100644 --- a/lustre/ptlrpc/sec.c +++ b/lustre/ptlrpc/sec.c @@ -1,23 +1,41 @@ /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * - * Copyright (C) 2004-2007 Cluster File Systems, Inc. - * Author: Eric Mei + * GPL HEADER START * - * This file is part of Lustre, http://www.lustre.org. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. * - * Lustre is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/ptlrpc/sec.c + * + * Author: Eric Mei */ #ifndef EXPORT_SYMTAB @@ -48,7 +66,7 @@ * policy registers * ***********************************************/ -static rwlock_t policy_lock = RW_LOCK_UNLOCKED; +static cfs_rwlock_t policy_lock; static struct ptlrpc_sec_policy *policies[SPTLRPC_POLICY_MAX] = { NULL, }; @@ -64,13 +82,13 @@ int sptlrpc_register_policy(struct ptlrpc_sec_policy *policy) if (number >= SPTLRPC_POLICY_MAX) return -EINVAL; - write_lock(&policy_lock); + cfs_write_lock(&policy_lock); if (unlikely(policies[number])) { - write_unlock(&policy_lock); + cfs_write_unlock(&policy_lock); return -EALREADY; } policies[number] = policy; - write_unlock(&policy_lock); + cfs_write_unlock(&policy_lock); CDEBUG(D_SEC, "%s: registered\n", policy->sp_name); return 0; @@ -83,16 +101,16 @@ int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy) LASSERT(number < SPTLRPC_POLICY_MAX); - write_lock(&policy_lock); + cfs_write_lock(&policy_lock); if (unlikely(policies[number] == NULL)) { - write_unlock(&policy_lock); + cfs_write_unlock(&policy_lock); CERROR("%s: already unregistered\n", policy->sp_name); return -EINVAL; } LASSERT(policies[number] == policy); policies[number] = NULL; - write_unlock(&policy_lock); + cfs_write_unlock(&policy_lock); CDEBUG(D_SEC, "%s: unregistered\n", policy->sp_name); return 0; @@ -100,46 +118,47 @@ int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy) EXPORT_SYMBOL(sptlrpc_unregister_policy); static -struct ptlrpc_sec_policy * sptlrpc_rpcflavor2policy(__u16 flavor) +struct ptlrpc_sec_policy * sptlrpc_wireflavor2policy(__u32 flavor) { - static DECLARE_MUTEX(load_mutex); - static atomic_t loaded = ATOMIC_INIT(0); + static CFS_DECLARE_MUTEX(load_mutex); + static cfs_atomic_t loaded = CFS_ATOMIC_INIT(0); struct ptlrpc_sec_policy *policy; - __u16 number = RPC_FLVR_POLICY(flavor), flag = 0; + __u16 number = SPTLRPC_FLVR_POLICY(flavor); + __u16 flag = 0; if (number >= SPTLRPC_POLICY_MAX) return NULL; -again: - read_lock(&policy_lock); - policy = policies[number]; - if (policy && !try_module_get(policy->sp_owner)) - policy = NULL; - if (policy == NULL) - flag = atomic_read(&loaded); - read_unlock(&policy_lock); - - /* if failure, try to load gss module, once */ - if (unlikely(policy == NULL) && flag == 0 && - number == SPTLRPC_POLICY_GSS) { - mutex_down(&load_mutex); - if (atomic_read(&loaded) == 0) { - if (request_module("ptlrpc_gss") != 0) - CERROR("Unable to load module ptlrpc_gss\n"); - else + while (1) { + cfs_read_lock(&policy_lock); + policy = policies[number]; + if (policy && !cfs_try_module_get(policy->sp_owner)) + policy = NULL; + if (policy == NULL) + flag = cfs_atomic_read(&loaded); + cfs_read_unlock(&policy_lock); + + if (policy != NULL || flag != 0 || + number != SPTLRPC_POLICY_GSS) + break; + + /* try to load gss module, once */ + cfs_mutex_down(&load_mutex); + if (cfs_atomic_read(&loaded) == 0) { + if (cfs_request_module("ptlrpc_gss") == 0) CWARN("module ptlrpc_gss loaded on demand\n"); + else + CERROR("Unable to load module ptlrpc_gss\n"); - atomic_set(&loaded, 1); + cfs_atomic_set(&loaded, 1); } - mutex_up(&load_mutex); - - goto again; + cfs_mutex_up(&load_mutex); } return policy; } -__u16 sptlrpc_name2rpcflavor(const char *name) +__u32 sptlrpc_name2flavor_base(const char *name) { if (!strcmp(name, "null")) return SPTLRPC_FLVR_NULL; @@ -147,6 +166,8 @@ __u16 sptlrpc_name2rpcflavor(const char *name) return SPTLRPC_FLVR_PLAIN; if (!strcmp(name, "krb5n")) return SPTLRPC_FLVR_KRB5N; + if (!strcmp(name, "krb5a")) + return SPTLRPC_FLVR_KRB5A; if (!strcmp(name, "krb5i")) return SPTLRPC_FLVR_KRB5I; if (!strcmp(name, "krb5p")) @@ -154,51 +175,86 @@ __u16 sptlrpc_name2rpcflavor(const char *name) return SPTLRPC_FLVR_INVALID; } -EXPORT_SYMBOL(sptlrpc_name2rpcflavor); +EXPORT_SYMBOL(sptlrpc_name2flavor_base); -const char *sptlrpc_rpcflavor2name(__u16 flavor) +const char *sptlrpc_flavor2name_base(__u32 flvr) { - switch (flavor) { - case SPTLRPC_FLVR_NULL: + __u32 base = SPTLRPC_FLVR_BASE(flvr); + + if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) return "null"; - case SPTLRPC_FLVR_PLAIN: + else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN)) return "plain"; - case SPTLRPC_FLVR_KRB5N: + else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5N)) return "krb5n"; - case SPTLRPC_FLVR_KRB5A: + else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5A)) return "krb5a"; - case SPTLRPC_FLVR_KRB5I: + else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5I)) return "krb5i"; - case SPTLRPC_FLVR_KRB5P: + else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5P)) return "krb5p"; - default: - CERROR("invalid rpc flavor 0x%x(p%u,s%u,v%u)\n", flavor, - RPC_FLVR_POLICY(flavor), RPC_FLVR_MECH(flavor), - RPC_FLVR_SVC(flavor)); - } - return "unknown"; + + CERROR("invalid wire flavor 0x%x\n", flvr); + return "invalid"; } -EXPORT_SYMBOL(sptlrpc_rpcflavor2name); +EXPORT_SYMBOL(sptlrpc_flavor2name_base); -int sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize) +char *sptlrpc_flavor2name_bulk(struct sptlrpc_flavor *sf, + char *buf, int bufsize) { - char *bulk; - - if (sf->sf_bulk_ciph != BULK_CIPH_ALG_NULL) - bulk = "bulkp"; - else if (sf->sf_bulk_hash != BULK_HASH_ALG_NULL) - bulk = "bulki"; + if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) + snprintf(buf, bufsize, "hash:%s", + sptlrpc_get_hash_name(sf->u_bulk.hash.hash_alg)); else - bulk = "bulkn"; + snprintf(buf, bufsize, "%s", + sptlrpc_flavor2name_base(sf->sf_rpc)); - snprintf(buf, bufsize, "%s-%s:%s/%s", - sptlrpc_rpcflavor2name(sf->sf_rpc), bulk, - sptlrpc_get_hash_name(sf->sf_bulk_hash), - sptlrpc_get_ciph_name(sf->sf_bulk_ciph)); - return 0; + buf[bufsize - 1] = '\0'; + return buf; +} +EXPORT_SYMBOL(sptlrpc_flavor2name_bulk); + +char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize) +{ + snprintf(buf, bufsize, "%s", sptlrpc_flavor2name_base(sf->sf_rpc)); + + /* + * currently we don't support customized bulk specification for + * flavors other than plain + */ + if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) { + char bspec[16]; + + bspec[0] = '-'; + sptlrpc_flavor2name_bulk(sf, &bspec[1], sizeof(bspec) - 1); + strncat(buf, bspec, bufsize); + } + + buf[bufsize - 1] = '\0'; + return buf; } EXPORT_SYMBOL(sptlrpc_flavor2name); +char *sptlrpc_secflags2str(__u32 flags, char *buf, int bufsize) +{ + buf[0] = '\0'; + + if (flags & PTLRPC_SEC_FL_REVERSE) + strncat(buf, "reverse,", bufsize); + if (flags & PTLRPC_SEC_FL_ROOTONLY) + strncat(buf, "rootonly,", bufsize); + if (flags & PTLRPC_SEC_FL_UDESC) + strncat(buf, "udesc,", bufsize); + if (flags & PTLRPC_SEC_FL_BULK) + strncat(buf, "bulk,", bufsize); + if (buf[0] == '\0') + strncat(buf, "-,", bufsize); + + buf[bufsize - 1] = '\0'; + return buf; +} +EXPORT_SYMBOL(sptlrpc_secflags2str); + /************************************************** * client context APIs * **************************************************/ @@ -221,8 +277,8 @@ struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec) remove_dead = 0; } } else { - vcred.vc_uid = cfs_current()->uid; - vcred.vc_gid = cfs_current()->gid; + vcred.vc_uid = cfs_curproc_uid(); + vcred.vc_gid = cfs_curproc_gid(); } return sec->ps_policy->sp_cops->lookup_ctx(sec, &vcred, @@ -231,8 +287,8 @@ struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec) struct ptlrpc_cli_ctx *sptlrpc_cli_ctx_get(struct ptlrpc_cli_ctx *ctx) { - LASSERT(atomic_read(&ctx->cc_refcount) > 0); - atomic_inc(&ctx->cc_refcount); + LASSERT(cfs_atomic_read(&ctx->cc_refcount) > 0); + cfs_atomic_inc(&ctx->cc_refcount); return ctx; } EXPORT_SYMBOL(sptlrpc_cli_ctx_get); @@ -242,18 +298,19 @@ void sptlrpc_cli_ctx_put(struct ptlrpc_cli_ctx *ctx, int sync) struct ptlrpc_sec *sec = ctx->cc_sec; LASSERT(sec); - LASSERT(atomic_read(&ctx->cc_refcount)); + LASSERT(cfs_atomic_read(&ctx->cc_refcount)); - if (!atomic_dec_and_test(&ctx->cc_refcount)) + if (!cfs_atomic_dec_and_test(&ctx->cc_refcount)) return; sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync); } EXPORT_SYMBOL(sptlrpc_cli_ctx_put); -/* - * expire the context immediately. - * the caller must hold at least 1 ref on the ctx. +/** + * Expire the client context immediately. + * + * \pre Caller must hold at least 1 reference on the \a ctx. */ void sptlrpc_cli_ctx_expire(struct ptlrpc_cli_ctx *ctx) { @@ -262,16 +319,21 @@ void sptlrpc_cli_ctx_expire(struct ptlrpc_cli_ctx *ctx) } EXPORT_SYMBOL(sptlrpc_cli_ctx_expire); +/** + * To wake up the threads who are waiting for this client context. Called + * after some status change happened on \a ctx. + */ void sptlrpc_cli_ctx_wakeup(struct ptlrpc_cli_ctx *ctx) { struct ptlrpc_request *req, *next; - spin_lock(&ctx->cc_lock); - list_for_each_entry_safe(req, next, &ctx->cc_req_list, rq_ctx_chain) { - list_del_init(&req->rq_ctx_chain); - ptlrpc_wake_client_req(req); + cfs_spin_lock(&ctx->cc_lock); + cfs_list_for_each_entry_safe(req, next, &ctx->cc_req_list, + rq_ctx_chain) { + cfs_list_del_init(&req->rq_ctx_chain); + ptlrpc_client_wake_req(req); } - spin_unlock(&ctx->cc_lock); + cfs_spin_unlock(&ctx->cc_lock); } EXPORT_SYMBOL(sptlrpc_cli_ctx_wakeup); @@ -285,17 +347,17 @@ int sptlrpc_cli_ctx_display(struct ptlrpc_cli_ctx *ctx, char *buf, int bufsize) return ctx->cc_ops->display(ctx, buf, bufsize); } -static int sptlrpc_import_sec_check_expire(struct obd_import *imp) +static int import_sec_check_expire(struct obd_import *imp) { int adapt = 0; - spin_lock(&imp->imp_lock); + cfs_spin_lock(&imp->imp_lock); if (imp->imp_sec_expire && imp->imp_sec_expire < cfs_time_current_sec()) { adapt = 1; imp->imp_sec_expire = 0; } - spin_unlock(&imp->imp_lock); + cfs_spin_unlock(&imp->imp_lock); if (!adapt) return 0; @@ -304,34 +366,54 @@ static int sptlrpc_import_sec_check_expire(struct obd_import *imp) return sptlrpc_import_sec_adapt(imp, NULL, 0); } -int sptlrpc_req_get_ctx(struct ptlrpc_request *req) +static int import_sec_validate_get(struct obd_import *imp, + struct ptlrpc_sec **sec) { - struct obd_import *imp = req->rq_import; - struct ptlrpc_sec *sec; - int rc; - ENTRY; - - LASSERT(!req->rq_cli_ctx); - LASSERT(imp); + int rc; if (unlikely(imp->imp_sec_expire)) { - rc = sptlrpc_import_sec_check_expire(imp); + rc = import_sec_check_expire(imp); if (rc) - RETURN(rc); + return rc; } - sec = sptlrpc_import_sec_ref(imp); - if (sec == NULL) { - CERROR("import %p (%s) with no ptlrpc_sec\n", + *sec = sptlrpc_import_sec_ref(imp); + if (*sec == NULL) { + CERROR("import %p (%s) with no sec\n", imp, ptlrpc_import_state_name(imp->imp_state)); - RETURN(-EACCES); + return -EACCES; } - if (unlikely(sec->ps_dying)) { + if (unlikely((*sec)->ps_dying)) { CERROR("attempt to use dying sec %p\n", sec); + sptlrpc_sec_put(*sec); return -EACCES; } + return 0; +} + +/** + * Given a \a req, find or allocate a appropriate context for it. + * \pre req->rq_cli_ctx == NULL. + * + * \retval 0 succeed, and req->rq_cli_ctx is set. + * \retval -ev error number, and req->rq_cli_ctx == NULL. + */ +int sptlrpc_req_get_ctx(struct ptlrpc_request *req) +{ + struct obd_import *imp = req->rq_import; + struct ptlrpc_sec *sec; + int rc; + ENTRY; + + LASSERT(!req->rq_cli_ctx); + LASSERT(imp); + + rc = import_sec_validate_get(imp, &sec); + if (rc) + RETURN(rc); + req->rq_cli_ctx = get_my_ctx(sec); sptlrpc_sec_put(sec); @@ -344,9 +426,14 @@ int sptlrpc_req_get_ctx(struct ptlrpc_request *req) RETURN(0); } -/* - * if @sync == 0, this function should return quickly without sleep; - * otherwise might trigger ctx destroying rpc to server. +/** + * Drop the context for \a req. + * \pre req->rq_cli_ctx != NULL. + * \post req->rq_cli_ctx == NULL. + * + * If \a sync == 0, this function should return quickly without sleep; + * otherwise it might trigger and wait for the whole process of sending + * an context-destroying rpc to server. */ void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync) { @@ -358,10 +445,10 @@ void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync) /* request might be asked to release earlier while still * in the context waiting list. */ - if (!list_empty(&req->rq_ctx_chain)) { - spin_lock(&req->rq_cli_ctx->cc_lock); - list_del_init(&req->rq_ctx_chain); - spin_unlock(&req->rq_cli_ctx->cc_lock); + if (!cfs_list_empty(&req->rq_ctx_chain)) { + cfs_spin_lock(&req->rq_cli_ctx->cc_lock); + cfs_list_del_init(&req->rq_ctx_chain); + cfs_spin_unlock(&req->rq_cli_ctx->cc_lock); } sptlrpc_cli_ctx_put(req->rq_cli_ctx, sync); @@ -379,15 +466,14 @@ int sptlrpc_req_ctx_switch(struct ptlrpc_request *req, int reqmsg_size; int rc; - if (likely(oldctx->cc_sec == newctx->cc_sec)) - return 0; - LASSERT(req->rq_reqmsg); LASSERT(req->rq_reqlen); LASSERT(req->rq_replen); - CWARN("req %p: switch ctx %p -> %p, switch sec %p(%s) -> %p(%s)\n", - req, oldctx, newctx, + CWARN("req %p: switch ctx %p(%u->%s) -> %p(%u->%s), " + "switch sec %p(%s) -> %p(%s)\n", req, + oldctx, oldctx->cc_vcred.vc_uid, sec2target_str(oldctx->cc_sec), + newctx, newctx->cc_vcred.vc_uid, sec2target_str(newctx->cc_sec), oldctx->cc_sec, oldctx->cc_sec->ps_policy->sp_name, newctx->cc_sec, newctx->cc_sec->ps_policy->sp_name); @@ -427,9 +513,13 @@ int sptlrpc_req_ctx_switch(struct ptlrpc_request *req, return rc; } -/* - * request must have a context. in any case of failure, restore the - * restore the old one. a request must have a ctx. +/** + * If current context of \a req is dead somehow, e.g. we just switched flavor + * thus marked original contexts dead, we'll find a new context for it. if + * no switch is needed, \a req will end up with the same context. + * + * \note a request must have a context, to keep other parts of code happy. + * In any case of failure during the switching, we must restore the old one. */ int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req) { @@ -439,7 +529,6 @@ int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req) ENTRY; LASSERT(oldctx); - LASSERT(test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags)); sptlrpc_cli_ctx_get(oldctx); sptlrpc_req_put_ctx(req, 0); @@ -456,15 +545,21 @@ int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req) newctx = req->rq_cli_ctx; LASSERT(newctx); - if (unlikely(newctx == oldctx)) { + if (unlikely(newctx == oldctx && + cfs_test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags))) { /* - * still get the old ctx, usually means system busy + * still get the old dead ctx, usually means system too busy */ CWARN("ctx (%p, fl %lx) doesn't switch, relax a little bit\n", newctx, newctx->cc_flags); - schedule_timeout(HZ); + cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE, + CFS_HZ); } else { + /* + * it's possible newctx == oldctx if we're switching + * subflavor with the same sec. + */ rc = sptlrpc_req_ctx_switch(req, oldctx, newctx); if (rc) { /* restore old ctx */ @@ -498,7 +593,7 @@ int ctx_refresh_timeout(void *data) /* conn_cnt is needed in expire_one_request */ lustre_msg_set_conn_cnt(req->rq_reqmsg, req->rq_import->imp_conn_cnt); - rc = ptlrpc_expire_one_request(req); + rc = ptlrpc_expire_one_request(req, 1); /* if we started recovery, we should mark this ctx dead; otherwise * in case of lgssd died nobody would retire this ctx, following * connecting will still find the same ctx thus cause deadlock. @@ -515,56 +610,74 @@ void ctx_refresh_interrupt(void *data) { struct ptlrpc_request *req = data; - spin_lock(&req->rq_lock); + cfs_spin_lock(&req->rq_lock); req->rq_intr = 1; - spin_unlock(&req->rq_lock); + cfs_spin_unlock(&req->rq_lock); } static void req_off_ctx_list(struct ptlrpc_request *req, struct ptlrpc_cli_ctx *ctx) { - spin_lock(&ctx->cc_lock); - if (!list_empty(&req->rq_ctx_chain)) - list_del_init(&req->rq_ctx_chain); - spin_unlock(&ctx->cc_lock); + cfs_spin_lock(&ctx->cc_lock); + if (!cfs_list_empty(&req->rq_ctx_chain)) + cfs_list_del_init(&req->rq_ctx_chain); + cfs_spin_unlock(&ctx->cc_lock); } -/* - * the status of context could be subject to be changed by other threads at any - * time. we allow this race. but once we return with 0, the caller will - * suppose it's uptodated and keep using it until the owning rpc is done. +/** + * To refresh the context of \req, if it's not up-to-date. + * \param timeout + * - < 0: don't wait + * - = 0: wait until success or fatal error occur + * - > 0: timeout value (in seconds) * - * @timeout: - * < 0 - don't wait - * = 0 - wait until success or fatal error occur - * > 0 - timeout value + * The status of the context could be subject to be changed by other threads + * at any time. We allow this race, but once we return with 0, the caller will + * suppose it's uptodated and keep using it until the owning rpc is done. * - * return 0 only if the context is uptodated. + * \retval 0 only if the context is uptodated. + * \retval -ev error number. */ int sptlrpc_req_refresh_ctx(struct ptlrpc_request *req, long timeout) { struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; + struct ptlrpc_sec *sec; struct l_wait_info lwi; int rc; ENTRY; LASSERT(ctx); + if (req->rq_ctx_init || req->rq_ctx_fini) + RETURN(0); + /* * during the process a request's context might change type even - * (e.g. from gss ctx to plain ctx), so each loop we need to re-check + * (e.g. from gss ctx to null ctx), so each loop we need to re-check * everything */ again: - /* skip special ctxs */ - if (cli_ctx_is_eternal(ctx) || req->rq_ctx_init || req->rq_ctx_fini) + rc = import_sec_validate_get(req->rq_import, &sec); + if (rc) + RETURN(rc); + + if (sec->ps_flvr.sf_rpc != req->rq_flvr.sf_rpc) { + CDEBUG(D_SEC, "req %p: flavor has changed %x -> %x\n", + req, req->rq_flvr.sf_rpc, sec->ps_flvr.sf_rpc); + req_off_ctx_list(req, ctx); + sptlrpc_req_replace_dead_ctx(req); + ctx = req->rq_cli_ctx; + } + sptlrpc_sec_put(sec); + + if (cli_ctx_is_eternal(ctx)) RETURN(0); - if (test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags)) { + if (unlikely(cfs_test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags))) { LASSERT(ctx->cc_ops->refresh); ctx->cc_ops->refresh(ctx); } - LASSERT(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags) == 0); + LASSERT(cfs_test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags) == 0); LASSERT(ctx->cc_ops->validate); if (ctx->cc_ops->validate(ctx) == 0) { @@ -572,97 +685,108 @@ again: RETURN(0); } - if (unlikely(test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags))) { + if (unlikely(cfs_test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags))) { + cfs_spin_lock(&req->rq_lock); req->rq_err = 1; + cfs_spin_unlock(&req->rq_lock); req_off_ctx_list(req, ctx); RETURN(-EPERM); } - /* This is subtle. For resent message we have to keep original - * context to survive following situation: - * 1. the request sent to server - * 2. recovery was kick start - * 3. recovery finished, the request marked as resent - * 4. resend the request - * 5. old reply from server received (because xid is the same) - * 6. verify reply (has to be success) - * 7. new reply from server received, lnet drop it + /* + * There's a subtle issue for resending RPCs, suppose following + * situation: + * 1. the request was sent to server. + * 2. recovery was kicked start, after finished the request was + * marked as resent. + * 3. resend the request. + * 4. old reply from server received, we accept and verify the reply. + * this has to be success, otherwise the error will be aware + * by application. + * 5. new reply from server received, dropped by LNet. * - * Note we can't simply change xid for resent request because - * server reply on it for reply reconstruction. + * Note the xid of old & new request is the same. We can't simply + * change xid for the resent request because the server replies on + * it for reply reconstruction. * * Commonly the original context should be uptodate because we - * have a expiry nice time; And server will keep their half part - * context because we at least hold a ref of old context which - * prevent the context detroy RPC be sent. So server still can - * accept the request and finish RPC. Two cases: - * 1. If server side context has been trimed, a NO_CONTEXT will + * have a expiry nice time; server will keep its context because + * we at least hold a ref of old context which prevent context + * destroying RPC being sent. So server still can accept the request + * and finish the RPC. But if that's not the case: + * 1. If server side context has been trimmed, a NO_CONTEXT will * be returned, gss_cli_ctx_verify/unseal will switch to new * context by force. * 2. Current context never be refreshed, then we are fine: we * never really send request with old context before. */ - if (test_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags) && + if (cfs_test_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags) && unlikely(req->rq_reqmsg) && lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { req_off_ctx_list(req, ctx); RETURN(0); } - if (unlikely(test_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags))) { + if (unlikely(cfs_test_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags))) { + req_off_ctx_list(req, ctx); + /* + * don't switch ctx if import was deactivated + */ + if (req->rq_import->imp_deactive) { + cfs_spin_lock(&req->rq_lock); + req->rq_err = 1; + cfs_spin_unlock(&req->rq_lock); + RETURN(-EINTR); + } + rc = sptlrpc_req_replace_dead_ctx(req); if (rc) { LASSERT(ctx == req->rq_cli_ctx); CERROR("req %p: failed to replace dead ctx %p: %d\n", req, ctx, rc); + cfs_spin_lock(&req->rq_lock); req->rq_err = 1; - LASSERT(list_empty(&req->rq_ctx_chain)); + cfs_spin_unlock(&req->rq_lock); RETURN(rc); } - CWARN("req %p: replace dead ctx %p => ctx %p (%u->%s)\n", - req, ctx, req->rq_cli_ctx, - req->rq_cli_ctx->cc_vcred.vc_uid, - sec2target_str(req->rq_cli_ctx->cc_sec)); - ctx = req->rq_cli_ctx; - LASSERT(list_empty(&req->rq_ctx_chain)); - goto again; } - /* Now we're sure this context is during upcall, add myself into + /* + * Now we're sure this context is during upcall, add myself into * waiting list */ - spin_lock(&ctx->cc_lock); - if (list_empty(&req->rq_ctx_chain)) - list_add(&req->rq_ctx_chain, &ctx->cc_req_list); - spin_unlock(&ctx->cc_lock); + cfs_spin_lock(&ctx->cc_lock); + if (cfs_list_empty(&req->rq_ctx_chain)) + cfs_list_add(&req->rq_ctx_chain, &ctx->cc_req_list); + cfs_spin_unlock(&ctx->cc_lock); - if (timeout < 0) { + if (timeout < 0) RETURN(-EWOULDBLOCK); - } /* Clear any flags that may be present from previous sends */ LASSERT(req->rq_receiving_reply == 0); - spin_lock(&req->rq_lock); + cfs_spin_lock(&req->rq_lock); req->rq_err = 0; req->rq_timedout = 0; req->rq_resend = 0; req->rq_restart = 0; - spin_unlock(&req->rq_lock); + cfs_spin_unlock(&req->rq_lock); - lwi = LWI_TIMEOUT_INTR(timeout * HZ, ctx_refresh_timeout, + lwi = LWI_TIMEOUT_INTR(timeout * CFS_HZ, ctx_refresh_timeout, ctx_refresh_interrupt, req); rc = l_wait_event(req->rq_reply_waitq, ctx_check_refresh(ctx), &lwi); - /* following cases we could be here: + /* + * following cases could lead us here: * - successfully refreshed; - * - interruptted; + * - interrupted; * - timedout, and we don't want recover from the failure; * - timedout, and waked up upon recovery finished; * - someone else mark this ctx dead by force; - * - someone invalidate the req and call wake_client_req(), + * - someone invalidate the req and call ptlrpc_client_wake_req(), * e.g. ptlrpc_abort_inflight(); */ if (!cli_ctx_is_refreshed(ctx)) { @@ -676,8 +800,10 @@ again: goto again; } -/* - * Note this could be called in two situations: +/** + * Initialize flavor settings for \a req, according to \a opcode. + * + * \note this could be called in two situations: * - new request from ptlrpc_pre_req(), with proper @opcode * - old request which changed ctx in the middle, with @opcode == 0 */ @@ -693,9 +819,11 @@ void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode) /* special security flags accoding to opcode */ switch (opcode) { case OST_READ: + case MDS_READPAGE: req->rq_bulk_read = 1; break; case OST_WRITE: + case MDS_WRITEPAGE: req->rq_bulk_write = 1; break; case SEC_CTX_INIT: @@ -717,16 +845,16 @@ void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode) sec = req->rq_cli_ctx->cc_sec; - spin_lock(&sec->ps_lock); + cfs_spin_lock(&sec->ps_lock); req->rq_flvr = sec->ps_flvr; - spin_unlock(&sec->ps_lock); + cfs_spin_unlock(&sec->ps_lock); /* force SVC_NULL for context initiation rpc, SVC_INTG for context * destruction rpc */ if (unlikely(req->rq_ctx_init)) - rpc_flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_NULL); + flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_NULL); else if (unlikely(req->rq_ctx_fini)) - rpc_flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_INTG); + flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_INTG); /* user descriptor flag, null security can't do it anyway */ if ((sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_UDESC) && @@ -735,14 +863,13 @@ void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode) /* bulk security flag */ if ((req->rq_bulk_read || req->rq_bulk_write) && - (req->rq_flvr.sf_bulk_ciph != BULK_CIPH_ALG_NULL || - req->rq_flvr.sf_bulk_hash != BULK_HASH_ALG_NULL)) + sptlrpc_flavor_has_bulk(&req->rq_flvr)) req->rq_pack_bulk = 1; } void sptlrpc_request_out_callback(struct ptlrpc_request *req) { - if (RPC_FLVR_SVC(req->rq_flvr.sf_rpc) != SPTLRPC_SVC_PRIV) + if (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc) != SPTLRPC_SVC_PRIV) return; LASSERT(req->rq_clrbuf); @@ -754,10 +881,10 @@ void sptlrpc_request_out_callback(struct ptlrpc_request *req) req->rq_reqbuf_len = 0; } -/* - * check whether current user have valid context for an import or not. - * might repeatedly try in case of non-fatal errors. - * return 0 on success, < 0 on failure +/** + * Given an import \a imp, check whether current user has a valid context + * or not. We may create a new context and try to refresh it, and try + * repeatedly try in case of non-fatal errors. Return 0 means success. */ int sptlrpc_import_check_ctx(struct obd_import *imp) { @@ -767,14 +894,14 @@ int sptlrpc_import_check_ctx(struct obd_import *imp) int rc; ENTRY; - might_sleep(); + cfs_might_sleep(); sec = sptlrpc_import_sec_ref(imp); ctx = get_my_ctx(sec); sptlrpc_sec_put(sec); if (!ctx) - RETURN(1); + RETURN(-ENOMEM); if (cli_ctx_is_eternal(ctx) || ctx->cc_ops->validate(ctx) == 0) { @@ -782,25 +909,37 @@ int sptlrpc_import_check_ctx(struct obd_import *imp) RETURN(0); } + if (cli_ctx_is_error(ctx)) { + sptlrpc_cli_ctx_put(ctx, 1); + RETURN(-EACCES); + } + OBD_ALLOC_PTR(req); if (!req) RETURN(-ENOMEM); - spin_lock_init(&req->rq_lock); - atomic_set(&req->rq_refcount, 10000); + cfs_spin_lock_init(&req->rq_lock); + cfs_atomic_set(&req->rq_refcount, 10000); CFS_INIT_LIST_HEAD(&req->rq_ctx_chain); - init_waitqueue_head(&req->rq_reply_waitq); + cfs_waitq_init(&req->rq_reply_waitq); + cfs_waitq_init(&req->rq_set_waitq); req->rq_import = imp; + req->rq_flvr = sec->ps_flvr; req->rq_cli_ctx = ctx; rc = sptlrpc_req_refresh_ctx(req, 0); - LASSERT(list_empty(&req->rq_ctx_chain)); + LASSERT(cfs_list_empty(&req->rq_ctx_chain)); sptlrpc_cli_ctx_put(req->rq_cli_ctx, 1); OBD_FREE_PTR(req); RETURN(rc); } +/** + * Used by ptlrpc client, to perform the pre-defined security transformation + * upon the request message of \a req. After this function called, + * req->rq_reqmsg is still accessible as clear text. + */ int sptlrpc_cli_wrap_request(struct ptlrpc_request *req) { struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; @@ -820,7 +959,7 @@ int sptlrpc_cli_wrap_request(struct ptlrpc_request *req) RETURN(rc); } - switch (RPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { + switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { case SPTLRPC_SVC_NULL: case SPTLRPC_SVC_AUTH: case SPTLRPC_SVC_INTG: @@ -844,10 +983,7 @@ int sptlrpc_cli_wrap_request(struct ptlrpc_request *req) RETURN(rc); } -/* - * rq_nob_received is the actual received data length - */ -int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) +static int do_cli_unwrap_reply(struct ptlrpc_request *req) { struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; int rc; @@ -855,56 +991,38 @@ int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) LASSERT(ctx); LASSERT(ctx->cc_sec); - LASSERT(ctx->cc_ops); LASSERT(req->rq_repbuf); + LASSERT(req->rq_repdata); + LASSERT(req->rq_repmsg == NULL); - req->rq_repdata_len = req->rq_nob_received; + req->rq_rep_swab_mask = 0; - if (req->rq_nob_received < sizeof(struct lustre_msg)) { - CERROR("replied data length %d too small\n", - req->rq_nob_received); + rc = __lustre_unpack_msg(req->rq_repdata, req->rq_repdata_len); + switch (rc) { + case 1: + lustre_set_rep_swabbed(req, MSG_PTLRPC_HEADER_OFF); + case 0: + break; + default: + CERROR("failed unpack reply: x"LPU64"\n", req->rq_xid); RETURN(-EPROTO); } + if (req->rq_repdata_len < sizeof(struct lustre_msg)) { + CERROR("replied data length %d too small\n", + req->rq_repdata_len); + RETURN(-EPROTO); + } - if (req->rq_repbuf->lm_magic == LUSTRE_MSG_MAGIC_V1 || - req->rq_repbuf->lm_magic == LUSTRE_MSG_MAGIC_V1_SWABBED) { - /* - * v1 message, it's must be null flavor, so our requets also - * should be in null flavor - */ - if (RPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != - SPTLRPC_POLICY_NULL) { - CERROR("request was %s but reply with null\n", - sptlrpc_rpcflavor2name(req->rq_flvr.sf_rpc)); - RETURN(-EPROTO); - } - } else { - /* - * v2 message, check request/reply policy match - */ - __u16 rpc_flvr = WIRE_FLVR_RPC(req->rq_repbuf->lm_secflvr); - - if (req->rq_repbuf->lm_magic == LUSTRE_MSG_MAGIC_V2_SWABBED) - __swab16s(&rpc_flvr); - - if (RPC_FLVR_POLICY(rpc_flvr) != - RPC_FLVR_POLICY(req->rq_flvr.sf_rpc)) { - CERROR("request policy was %u while reply with %u\n", - RPC_FLVR_POLICY(req->rq_flvr.sf_rpc), - RPC_FLVR_POLICY(rpc_flvr)); - RETURN(-EPROTO); - } - - /* do nothing if it's null policy; otherwise unpack the - * wrapper message - */ - if (RPC_FLVR_POLICY(rpc_flvr) != SPTLRPC_POLICY_NULL && - lustre_unpack_msg(req->rq_repbuf, req->rq_nob_received)) - RETURN(-EPROTO); + if (SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr) != + SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)) { + CERROR("reply policy %u doesn't match request policy %u\n", + SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr), + SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)); + RETURN(-EPROTO); } - switch (RPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { + switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { case SPTLRPC_SVC_NULL: case SPTLRPC_SVC_AUTH: case SPTLRPC_SVC_INTG: @@ -918,11 +1036,163 @@ int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) default: LBUG(); } - LASSERT(rc || req->rq_repmsg || req->rq_resend); + + if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL && + !req->rq_ctx_init) + req->rq_rep_swab_mask = 0; RETURN(rc); } +/** + * Used by ptlrpc client, to perform security transformation upon the reply + * message of \a req. After return successfully, req->rq_repmsg points to + * the reply message in clear text. + * + * \pre the reply buffer should have been un-posted from LNet, so nothing is + * going to change. + */ +int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) +{ + LASSERT(req->rq_repbuf); + LASSERT(req->rq_repdata == NULL); + LASSERT(req->rq_repmsg == NULL); + LASSERT(req->rq_reply_off + req->rq_nob_received <= req->rq_repbuf_len); + + if (req->rq_reply_off == 0 && + (lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) { + CERROR("real reply with offset 0\n"); + return -EPROTO; + } + + if (req->rq_reply_off % 8 != 0) { + CERROR("reply at odd offset %u\n", req->rq_reply_off); + return -EPROTO; + } + + req->rq_repdata = (struct lustre_msg *) + (req->rq_repbuf + req->rq_reply_off); + req->rq_repdata_len = req->rq_nob_received; + + return do_cli_unwrap_reply(req); +} + +/** + * Used by ptlrpc client, to perform security transformation upon the early + * reply message of \a req. We expect the rq_reply_off is 0, and + * rq_nob_received is the early reply size. + * + * Because the receive buffer might be still posted, the reply data might be + * changed at any time, no matter we're holding rq_lock or not. For this reason + * we allocate a separate ptlrpc_request and reply buffer for early reply + * processing. + * + * \retval 0 success, \a req_ret is filled with a duplicated ptlrpc_request. + * Later the caller must call sptlrpc_cli_finish_early_reply() on the returned + * \a *req_ret to release it. + * \retval -ev error number, and \a req_ret will not be set. + */ +int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req, + struct ptlrpc_request **req_ret) +{ + struct ptlrpc_request *early_req; + char *early_buf; + int early_bufsz, early_size; + int rc; + ENTRY; + + OBD_ALLOC_PTR(early_req); + if (early_req == NULL) + RETURN(-ENOMEM); + + early_size = req->rq_nob_received; + early_bufsz = size_roundup_power2(early_size); + OBD_ALLOC(early_buf, early_bufsz); + if (early_buf == NULL) + GOTO(err_req, rc = -ENOMEM); + + /* sanity checkings and copy data out, do it inside spinlock */ + cfs_spin_lock(&req->rq_lock); + + if (req->rq_replied) { + cfs_spin_unlock(&req->rq_lock); + GOTO(err_buf, rc = -EALREADY); + } + + LASSERT(req->rq_repbuf); + LASSERT(req->rq_repdata == NULL); + LASSERT(req->rq_repmsg == NULL); + + if (req->rq_reply_off != 0) { + CERROR("early reply with offset %u\n", req->rq_reply_off); + cfs_spin_unlock(&req->rq_lock); + GOTO(err_buf, rc = -EPROTO); + } + + if (req->rq_nob_received != early_size) { + /* even another early arrived the size should be the same */ + CERROR("data size has changed from %u to %u\n", + early_size, req->rq_nob_received); + cfs_spin_unlock(&req->rq_lock); + GOTO(err_buf, rc = -EINVAL); + } + + if (req->rq_nob_received < sizeof(struct lustre_msg)) { + CERROR("early reply length %d too small\n", + req->rq_nob_received); + cfs_spin_unlock(&req->rq_lock); + GOTO(err_buf, rc = -EALREADY); + } + + memcpy(early_buf, req->rq_repbuf, early_size); + cfs_spin_unlock(&req->rq_lock); + + cfs_spin_lock_init(&early_req->rq_lock); + early_req->rq_cli_ctx = sptlrpc_cli_ctx_get(req->rq_cli_ctx); + early_req->rq_flvr = req->rq_flvr; + early_req->rq_repbuf = early_buf; + early_req->rq_repbuf_len = early_bufsz; + early_req->rq_repdata = (struct lustre_msg *) early_buf; + early_req->rq_repdata_len = early_size; + early_req->rq_early = 1; + early_req->rq_reqmsg = req->rq_reqmsg; + + rc = do_cli_unwrap_reply(early_req); + if (rc) { + DEBUG_REQ(D_ADAPTTO, early_req, + "error %d unwrap early reply", rc); + GOTO(err_ctx, rc); + } + + LASSERT(early_req->rq_repmsg); + *req_ret = early_req; + RETURN(0); + +err_ctx: + sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); +err_buf: + OBD_FREE(early_buf, early_bufsz); +err_req: + OBD_FREE_PTR(early_req); + RETURN(rc); +} + +/** + * Used by ptlrpc client, to release a processed early reply \a early_req. + * + * \pre \a early_req was obtained from calling sptlrpc_cli_unwrap_early_reply(). + */ +void sptlrpc_cli_finish_early_reply(struct ptlrpc_request *early_req) +{ + LASSERT(early_req->rq_repbuf); + LASSERT(early_req->rq_repdata); + LASSERT(early_req->rq_repmsg); + + sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); + OBD_FREE(early_req->rq_repbuf, early_req->rq_repbuf_len); + OBD_FREE_PTR(early_req); +} + /************************************************** * sec ID * **************************************************/ @@ -930,11 +1200,11 @@ int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) /* * "fixed" sec (e.g. null) use sec_id < 0 */ -static atomic_t sptlrpc_sec_id = ATOMIC_INIT(1); +static cfs_atomic_t sptlrpc_sec_id = CFS_ATOMIC_INIT(1); int sptlrpc_get_next_secid(void) { - return atomic_inc_return(&sptlrpc_sec_id); + return cfs_atomic_inc_return(&sptlrpc_sec_id); } EXPORT_SYMBOL(sptlrpc_get_next_secid); @@ -957,8 +1227,8 @@ static void sec_cop_destroy_sec(struct ptlrpc_sec *sec) { struct ptlrpc_sec_policy *policy = sec->ps_policy; - LASSERT(atomic_read(&sec->ps_refcount) == 0); - LASSERT(atomic_read(&sec->ps_nctx) == 0); + LASSERT(cfs_atomic_read(&sec->ps_refcount) == 0); + LASSERT(cfs_atomic_read(&sec->ps_nctx) == 0); LASSERT(policy->sp_cops->destroy_sec); CDEBUG(D_SEC, "%s@%p: being destroied\n", sec->ps_policy->sp_name, sec); @@ -975,7 +1245,7 @@ EXPORT_SYMBOL(sptlrpc_sec_destroy); static void sptlrpc_sec_kill(struct ptlrpc_sec *sec) { - LASSERT(atomic_read(&sec->ps_refcount) > 0); + LASSERT(cfs_atomic_read(&sec->ps_refcount) > 0); if (sec->ps_policy->sp_cops->kill_sec) { sec->ps_policy->sp_cops->kill_sec(sec); @@ -987,8 +1257,8 @@ static void sptlrpc_sec_kill(struct ptlrpc_sec *sec) struct ptlrpc_sec *sptlrpc_sec_get(struct ptlrpc_sec *sec) { if (sec) { - LASSERT(atomic_read(&sec->ps_refcount) > 0); - atomic_inc(&sec->ps_refcount); + LASSERT(cfs_atomic_read(&sec->ps_refcount) > 0); + cfs_atomic_inc(&sec->ps_refcount); } return sec; @@ -998,10 +1268,10 @@ EXPORT_SYMBOL(sptlrpc_sec_get); void sptlrpc_sec_put(struct ptlrpc_sec *sec) { if (sec) { - LASSERT(atomic_read(&sec->ps_refcount) > 0); + LASSERT(cfs_atomic_read(&sec->ps_refcount) > 0); - if (atomic_dec_and_test(&sec->ps_refcount)) { - LASSERT(atomic_read(&sec->ps_nctx) == 0); + if (cfs_atomic_dec_and_test(&sec->ps_refcount)) { + LASSERT(cfs_atomic_read(&sec->ps_nctx) == 0); sptlrpc_gc_del_sec(sec); sec_cop_destroy_sec(sec); @@ -1011,7 +1281,7 @@ void sptlrpc_sec_put(struct ptlrpc_sec *sec) EXPORT_SYMBOL(sptlrpc_sec_put); /* - * it's policy module responsible for taking refrence of import + * policy module is responsible for taking refrence of import */ static struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp, @@ -1021,6 +1291,7 @@ struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp, { struct ptlrpc_sec_policy *policy; struct ptlrpc_sec *sec; + char str[32]; ENTRY; if (svc_ctx) { @@ -1029,7 +1300,7 @@ struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp, CDEBUG(D_SEC, "%s %s: reverse sec using flavor %s\n", imp->imp_obd->obd_type->typ_name, imp->imp_obd->obd_name, - sptlrpc_rpcflavor2name(sf->sf_rpc)); + sptlrpc_flavor2name(sf, str, sizeof(str))); policy = sptlrpc_policy_get(svc_ctx->sc_policy); sf->sf_flags |= PTLRPC_SEC_FL_REVERSE | PTLRPC_SEC_FL_ROOTONLY; @@ -1039,9 +1310,9 @@ struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp, CDEBUG(D_SEC, "%s %s: select security flavor %s\n", imp->imp_obd->obd_type->typ_name, imp->imp_obd->obd_name, - sptlrpc_rpcflavor2name(sf->sf_rpc)); + sptlrpc_flavor2name(sf, str, sizeof(str))); - policy = sptlrpc_rpcflavor2policy(sf->sf_rpc); + policy = sptlrpc_wireflavor2policy(sf->sf_rpc); if (!policy) { CERROR("invalid flavor 0x%x\n", sf->sf_rpc); RETURN(NULL); @@ -1050,7 +1321,7 @@ struct ptlrpc_sec * sptlrpc_sec_create(struct obd_import *imp, sec = policy->sp_cops->create_sec(imp, svc_ctx, sf); if (sec) { - atomic_inc(&sec->ps_refcount); + cfs_atomic_inc(&sec->ps_refcount); sec->ps_part = sp; @@ -1067,9 +1338,9 @@ struct ptlrpc_sec *sptlrpc_import_sec_ref(struct obd_import *imp) { struct ptlrpc_sec *sec; - spin_lock(&imp->imp_lock); + cfs_spin_lock(&imp->imp_lock); sec = sptlrpc_sec_get(imp->imp_sec); - spin_unlock(&imp->imp_lock); + cfs_spin_unlock(&imp->imp_lock); return sec; } @@ -1080,12 +1351,12 @@ static void sptlrpc_import_sec_install(struct obd_import *imp, { struct ptlrpc_sec *old_sec; - LASSERT(atomic_read(&sec->ps_refcount) > 0); + LASSERT(cfs_atomic_read(&sec->ps_refcount) > 0); - spin_lock(&imp->imp_lock); + cfs_spin_lock(&imp->imp_lock); old_sec = imp->imp_sec; imp->imp_sec = sec; - spin_unlock(&imp->imp_lock); + cfs_spin_unlock(&imp->imp_lock); if (old_sec) { sptlrpc_sec_kill(old_sec); @@ -1095,138 +1366,132 @@ static void sptlrpc_import_sec_install(struct obd_import *imp, } } +static inline +int flavor_equal(struct sptlrpc_flavor *sf1, struct sptlrpc_flavor *sf2) +{ + return (memcmp(sf1, sf2, sizeof(*sf1)) == 0); +} + +static inline +void flavor_copy(struct sptlrpc_flavor *dst, struct sptlrpc_flavor *src) +{ + *dst = *src; +} + static void sptlrpc_import_sec_adapt_inplace(struct obd_import *imp, struct ptlrpc_sec *sec, struct sptlrpc_flavor *sf) { - if (sf->sf_bulk_ciph != sec->ps_flvr.sf_bulk_ciph || - sf->sf_bulk_hash != sec->ps_flvr.sf_bulk_hash) { - CWARN("imp %p (%s->%s): changing bulk flavor %s/%s -> %s/%s\n", - imp, imp->imp_obd->obd_name, - obd_uuid2str(&imp->imp_connection->c_remote_uuid), - sptlrpc_get_ciph_name(sec->ps_flvr.sf_bulk_ciph), - sptlrpc_get_hash_name(sec->ps_flvr.sf_bulk_hash), - sptlrpc_get_ciph_name(sf->sf_bulk_ciph), - sptlrpc_get_hash_name(sf->sf_bulk_hash)); - - spin_lock(&sec->ps_lock); - sec->ps_flvr.sf_bulk_ciph = sf->sf_bulk_ciph; - sec->ps_flvr.sf_bulk_hash = sf->sf_bulk_hash; - spin_unlock(&sec->ps_lock); - } + char str1[32], str2[32]; - if (!equi(sf->sf_flags & PTLRPC_SEC_FL_UDESC, - sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_UDESC)) { - CWARN("imp %p (%s->%s): %s shipping user descriptor\n", - imp, imp->imp_obd->obd_name, - obd_uuid2str(&imp->imp_connection->c_remote_uuid), - (sf->sf_flags & PTLRPC_SEC_FL_UDESC) ? "start" : "stop"); + if (sec->ps_flvr.sf_flags != sf->sf_flags) + CWARN("changing sec flags: %s -> %s\n", + sptlrpc_secflags2str(sec->ps_flvr.sf_flags, + str1, sizeof(str1)), + sptlrpc_secflags2str(sf->sf_flags, + str2, sizeof(str2))); - spin_lock(&sec->ps_lock); - sec->ps_flvr.sf_flags &= ~PTLRPC_SEC_FL_UDESC; - sec->ps_flvr.sf_flags |= sf->sf_flags & PTLRPC_SEC_FL_UDESC; - spin_unlock(&sec->ps_lock); - } + cfs_spin_lock(&sec->ps_lock); + flavor_copy(&sec->ps_flvr, sf); + cfs_spin_unlock(&sec->ps_lock); } -/* - * for normal import, @svc_ctx should be NULL and @rpc_flavor is ignored; - * for reverse import, @svc_ctx and @rpc_flavor is from incoming request. +/** + * To get an appropriate ptlrpc_sec for the \a imp, according to the current + * configuration. Upon called, imp->imp_sec may or may not be NULL. + * + * - regular import: \a svc_ctx should be NULL and \a flvr is ignored; + * - reverse import: \a svc_ctx and \a flvr are obtained from incoming request. */ int sptlrpc_import_sec_adapt(struct obd_import *imp, struct ptlrpc_svc_ctx *svc_ctx, - __u16 rpc_flavor) + struct sptlrpc_flavor *flvr) { struct ptlrpc_connection *conn; struct sptlrpc_flavor sf; struct ptlrpc_sec *sec, *newsec; enum lustre_sec_part sp; - int rc; + char str[24]; + int rc = 0; + ENTRY; + + cfs_might_sleep(); if (imp == NULL) - return 0; + RETURN(0); conn = imp->imp_connection; if (svc_ctx == NULL) { - /* normal import, determine flavor from rule set */ - sptlrpc_rule_set_choose(&imp->imp_obd->u.cli.cl_sptlrpc_rset, - LUSTRE_SP_ANY, conn->c_self, &sf); - - sp = imp->imp_obd->u.cli.cl_sec_part; + struct client_obd *cliobd = &imp->imp_obd->u.cli; + /* + * normal import, determine flavor from rule set, except + * for mgc the flavor is predetermined. + */ + if (cliobd->cl_sp_me == LUSTRE_SP_MGC) + sf = cliobd->cl_flvr_mgc; + else + sptlrpc_conf_choose_flavor(cliobd->cl_sp_me, + cliobd->cl_sp_to, + &cliobd->cl_target_uuid, + conn->c_self, &sf); + + sp = imp->imp_obd->u.cli.cl_sp_me; } else { /* reverse import, determine flavor from incoming reqeust */ - sf.sf_rpc = rpc_flavor; - sf.sf_bulk_ciph = BULK_CIPH_ALG_NULL; - sf.sf_bulk_hash = BULK_HASH_ALG_NULL; - sf.sf_flags = PTLRPC_SEC_FL_REVERSE | PTLRPC_SEC_FL_ROOTONLY; + sf = *flvr; + + if (sf.sf_rpc != SPTLRPC_FLVR_NULL) + sf.sf_flags = PTLRPC_SEC_FL_REVERSE | + PTLRPC_SEC_FL_ROOTONLY; sp = sptlrpc_target_sec_part(imp->imp_obd); } sec = sptlrpc_import_sec_ref(imp); if (sec) { - if (svc_ctx == NULL) { - /* normal import, only check rpc flavor, if just bulk - * flavor or flags changed, we can handle it on the fly - * without switching sec. */ - if (sf.sf_rpc == sec->ps_flvr.sf_rpc) { - sptlrpc_import_sec_adapt_inplace(imp, sec, &sf); - - rc = 0; - goto out; - } - } else { - /* reverse import, do not compare bulk flavor */ - if (sf.sf_rpc == sec->ps_flvr.sf_rpc) { - rc = 0; - goto out; - } - } + char str2[24]; + + if (flavor_equal(&sf, &sec->ps_flvr)) + GOTO(out, rc); - CWARN("%simport %p (%s%s%s): changing flavor " - "(%s, %s/%s) -> (%s, %s/%s)\n", - svc_ctx ? "reverse " : "", - imp, imp->imp_obd->obd_name, - svc_ctx == NULL ? "->" : "<-", + CWARN("import %s->%s: changing flavor %s -> %s\n", + imp->imp_obd->obd_name, obd_uuid2str(&conn->c_remote_uuid), - sptlrpc_rpcflavor2name(sec->ps_flvr.sf_rpc), - sptlrpc_get_hash_name(sec->ps_flvr.sf_bulk_hash), - sptlrpc_get_ciph_name(sec->ps_flvr.sf_bulk_ciph), - sptlrpc_rpcflavor2name(sf.sf_rpc), - sptlrpc_get_hash_name(sf.sf_bulk_hash), - sptlrpc_get_ciph_name(sf.sf_bulk_ciph)); + sptlrpc_flavor2name(&sec->ps_flvr, str, sizeof(str)), + sptlrpc_flavor2name(&sf, str2, sizeof(str2))); + + if (SPTLRPC_FLVR_POLICY(sf.sf_rpc) == + SPTLRPC_FLVR_POLICY(sec->ps_flvr.sf_rpc) && + SPTLRPC_FLVR_MECH(sf.sf_rpc) == + SPTLRPC_FLVR_MECH(sec->ps_flvr.sf_rpc)) { + sptlrpc_import_sec_adapt_inplace(imp, sec, &sf); + GOTO(out, rc); + } } else { - CWARN("%simport %p (%s%s%s) netid %x: " - "select initial flavor (%s, %s/%s)\n", - svc_ctx == NULL ? "" : "reverse ", - imp, imp->imp_obd->obd_name, - svc_ctx == NULL ? "->" : "<-", + CWARN("import %s->%s netid %x: select flavor %s\n", + imp->imp_obd->obd_name, obd_uuid2str(&conn->c_remote_uuid), LNET_NIDNET(conn->c_self), - sptlrpc_rpcflavor2name(sf.sf_rpc), - sptlrpc_get_hash_name(sf.sf_bulk_hash), - sptlrpc_get_ciph_name(sf.sf_bulk_ciph)); + sptlrpc_flavor2name(&sf, str, sizeof(str))); } - mutex_down(&imp->imp_sec_mutex); + cfs_mutex_down(&imp->imp_sec_mutex); newsec = sptlrpc_sec_create(imp, svc_ctx, &sf, sp); if (newsec) { sptlrpc_import_sec_install(imp, newsec); - rc = 0; } else { - CERROR("%simport %p (%s): failed to create new sec\n", - svc_ctx == NULL ? "" : "reverse ", - imp, obd_uuid2str(&conn->c_remote_uuid)); + CERROR("import %s->%s: failed to create new sec\n", + imp->imp_obd->obd_name, + obd_uuid2str(&conn->c_remote_uuid)); rc = -EPERM; } - mutex_up(&imp->imp_sec_mutex); - + cfs_mutex_up(&imp->imp_sec_mutex); out: sptlrpc_sec_put(sec); - return 0; + RETURN(rc); } void sptlrpc_import_sec_put(struct obd_import *imp) @@ -1255,12 +1520,6 @@ static void import_flush_ctx_common(struct obd_import *imp, sptlrpc_sec_put(sec); } -void sptlrpc_import_inval_all_ctx(struct obd_import *imp) -{ - /* use grace == 0 */ - import_flush_ctx_common(imp, -1, 0, 1); -} - void sptlrpc_import_flush_root_ctx(struct obd_import *imp) { /* it's important to use grace mode, see explain in @@ -1270,7 +1529,7 @@ void sptlrpc_import_flush_root_ctx(struct obd_import *imp) void sptlrpc_import_flush_my_ctx(struct obd_import *imp) { - import_flush_ctx_common(imp, cfs_current()->uid, 1, 1); + import_flush_ctx_common(imp, cfs_curproc_uid(), 1, 1); } EXPORT_SYMBOL(sptlrpc_import_flush_my_ctx); @@ -1280,9 +1539,9 @@ void sptlrpc_import_flush_all_ctx(struct obd_import *imp) } EXPORT_SYMBOL(sptlrpc_import_flush_all_ctx); -/* - * when complete successfully, req->rq_reqmsg should point to the - * right place. +/** + * Used by ptlrpc client to allocate request buffer of \a req. Upon return + * successfully, req->rq_reqmsg points to a buffer with size \a msgsize. */ int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize) { @@ -1291,7 +1550,7 @@ int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize) int rc; LASSERT(ctx); - LASSERT(atomic_read(&ctx->cc_refcount)); + LASSERT(cfs_atomic_read(&ctx->cc_refcount)); LASSERT(ctx->cc_sec); LASSERT(ctx->cc_sec->ps_policy); LASSERT(req->rq_reqmsg == NULL); @@ -1310,13 +1569,17 @@ int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize) return rc; } +/** + * Used by ptlrpc client to free request buffer of \a req. After this + * req->rq_reqmsg is set to NULL and should not be accessed anymore. + */ void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req) { struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; struct ptlrpc_sec_policy *policy; LASSERT(ctx); - LASSERT(atomic_read(&ctx->cc_refcount)); + LASSERT(cfs_atomic_read(&ctx->cc_refcount)); LASSERT(ctx->cc_sec); LASSERT(ctx->cc_sec->ps_policy); @@ -1325,6 +1588,7 @@ void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req) policy = ctx->cc_sec->ps_policy; policy->sp_cops->free_reqbuf(ctx->cc_sec, req); + req->rq_reqmsg = NULL; } /* @@ -1371,13 +1635,14 @@ void _sptlrpc_enlarge_msg_inplace(struct lustre_msg *msg, } EXPORT_SYMBOL(_sptlrpc_enlarge_msg_inplace); -/* - * enlarge @segment of upper message req->rq_reqmsg to @newsize, all data - * will be preserved after enlargement. this must be called after rq_reqmsg has - * been intialized at least. +/** + * Used by ptlrpc client to enlarge the \a segment of request message pointed + * by req->rq_reqmsg to size \a newsize, all previously filled-in data will be + * preserved after the enlargement. this must be called after original request + * buffer being allocated. * - * caller's attention: upon return, rq_reqmsg and rq_reqlen might have - * been changed. + * \note after this be called, rq_reqmsg and rq_reqlen might have been changed, + * so caller should refresh its local pointers if needed. */ int sptlrpc_cli_enlarge_reqbuf(struct ptlrpc_request *req, int segment, int newsize) @@ -1400,6 +1665,11 @@ int sptlrpc_cli_enlarge_reqbuf(struct ptlrpc_request *req, } EXPORT_SYMBOL(sptlrpc_cli_enlarge_reqbuf); +/** + * Used by ptlrpc client to allocate reply buffer of \a req. + * + * \note After this, req->rq_repmsg is still not accessible. + */ int sptlrpc_cli_alloc_repbuf(struct ptlrpc_request *req, int msgsize) { struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; @@ -1407,7 +1677,7 @@ int sptlrpc_cli_alloc_repbuf(struct ptlrpc_request *req, int msgsize) ENTRY; LASSERT(ctx); - LASSERT(atomic_read(&ctx->cc_refcount)); + LASSERT(cfs_atomic_read(&ctx->cc_refcount)); LASSERT(ctx->cc_sec); LASSERT(ctx->cc_sec->ps_policy); @@ -1418,6 +1688,10 @@ int sptlrpc_cli_alloc_repbuf(struct ptlrpc_request *req, int msgsize) RETURN(policy->sp_cops->alloc_repbuf(ctx->cc_sec, req, msgsize)); } +/** + * Used by ptlrpc client to free reply buffer of \a req. After this + * req->rq_repmsg is set to NULL and should not be accessed anymore. + */ void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req) { struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; @@ -1425,7 +1699,7 @@ void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req) ENTRY; LASSERT(ctx); - LASSERT(atomic_read(&ctx->cc_refcount)); + LASSERT(cfs_atomic_read(&ctx->cc_refcount)); LASSERT(ctx->cc_sec); LASSERT(ctx->cc_sec->ps_policy); @@ -1435,6 +1709,7 @@ void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req) policy = ctx->cc_sec->ps_policy; policy->sp_cops->free_repbuf(ctx->cc_sec, req); + req->rq_repmsg = NULL; EXIT; } @@ -1467,12 +1742,13 @@ static int flavor_allowed(struct sptlrpc_flavor *exp, { struct sptlrpc_flavor *flvr = &req->rq_flvr; - if (exp->sf_rpc == flvr->sf_rpc) + if (exp->sf_rpc == SPTLRPC_FLVR_ANY || exp->sf_rpc == flvr->sf_rpc) return 1; if ((req->rq_ctx_init || req->rq_ctx_fini) && - RPC_FLVR_POLICY(exp->sf_rpc) == RPC_FLVR_POLICY(flvr->sf_rpc) && - RPC_FLVR_MECH(exp->sf_rpc) == RPC_FLVR_MECH(flvr->sf_rpc)) + SPTLRPC_FLVR_POLICY(exp->sf_rpc) == + SPTLRPC_FLVR_POLICY(flvr->sf_rpc) && + SPTLRPC_FLVR_MECH(exp->sf_rpc) == SPTLRPC_FLVR_MECH(flvr->sf_rpc)) return 1; return 0; @@ -1480,6 +1756,11 @@ static int flavor_allowed(struct sptlrpc_flavor *exp, #define EXP_FLVR_UPDATE_EXPIRE (OBD_TIMEOUT_DEFAULT + 10) +/** + * Given an export \a exp, check whether the flavor of incoming \a req + * is allowed by the export \a exp. Main logic is about taking care of + * changing configurations. Return 0 means success. + */ int sptlrpc_target_export_check(struct obd_export *exp, struct ptlrpc_request *req) { @@ -1497,7 +1778,7 @@ int sptlrpc_target_export_check(struct obd_export *exp, if (req->rq_ctx_fini) return 0; - spin_lock(&exp->exp_lock); + cfs_spin_lock(&exp->exp_lock); /* if flavor just changed (exp->exp_flvr_changed != 0), we wait for * the first req with the new flavor, then treat it as current flavor, @@ -1526,7 +1807,7 @@ int sptlrpc_target_export_check(struct obd_export *exp, if (req->rq_auth_gss && !(req->rq_ctx_init && (req->rq_auth_usr_root || req->rq_auth_usr_mdt))) { - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); CDEBUG(D_SEC, "is good but not root(%d:%d:%d:%d)\n", req->rq_auth_gss, req->rq_ctx_init, req->rq_auth_usr_root, req->rq_auth_usr_mdt); @@ -1534,10 +1815,10 @@ int sptlrpc_target_export_check(struct obd_export *exp, } exp->exp_flvr_adapt = 0; - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, - req->rq_svc_ctx, flavor.sf_rpc); + req->rq_svc_ctx, &flavor); } /* if it equals to the current flavor, we accept it, but need to @@ -1547,7 +1828,7 @@ int sptlrpc_target_export_check(struct obd_export *exp, * gss root ctx init */ if (!req->rq_auth_gss || !req->rq_ctx_init || (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt)) { - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return 0; } @@ -1556,7 +1837,7 @@ int sptlrpc_target_export_check(struct obd_export *exp, * shortly, and let _this_ rpc pass through */ if (exp->exp_flvr_changed) { LASSERT(exp->exp_flvr_adapt); - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return 0; } @@ -1567,17 +1848,17 @@ int sptlrpc_target_export_check(struct obd_export *exp, exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc); flavor = exp->exp_flvr; - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, req->rq_svc_ctx, - flavor.sf_rpc); + &flavor); } else { CDEBUG(D_SEC, "exp %p (%x|%x|%x): is current flavor, " "install rvs ctx\n", exp, exp->exp_flvr.sf_rpc, exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc); - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return sptlrpc_svc_install_rvs_ctx(exp->exp_imp_reverse, req->rq_svc_ctx); @@ -1588,13 +1869,13 @@ int sptlrpc_target_export_check(struct obd_export *exp, if (exp->exp_flvr_expire[0] >= cfs_time_current_sec()) { if (flavor_allowed(&exp->exp_flvr_old[0], req)) { CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the " - "middle one (%lu)\n", exp, + "middle one ("CFS_DURATION_T")\n", exp, exp->exp_flvr.sf_rpc, exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, exp->exp_flvr_expire[0] - cfs_time_current_sec()); - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return 0; } } else { @@ -1613,13 +1894,13 @@ int sptlrpc_target_export_check(struct obd_export *exp, if (exp->exp_flvr_expire[1] >= cfs_time_current_sec()) { if (flavor_allowed(&exp->exp_flvr_old[1], req)) { CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the " - "oldest one (%lu)\n", exp, + "oldest one ("CFS_DURATION_T")\n", exp, exp->exp_flvr.sf_rpc, exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, exp->exp_flvr_expire[1] - cfs_time_current_sec()); - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); return 0; } } else { @@ -1636,13 +1917,25 @@ int sptlrpc_target_export_check(struct obd_export *exp, exp->exp_flvr_old[1].sf_rpc); } - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); - CWARN("req %p: (%u|%u|%u|%u|%u) with unauthorized flavor %x\n", + CWARN("exp %p(%s): req %p (%u|%u|%u|%u|%u) with " + "unauthorized flavor %x, expect %x|%x(%+ld)|%x(%+ld)\n", + exp, exp->exp_obd->obd_name, req, req->rq_auth_gss, req->rq_ctx_init, req->rq_ctx_fini, - req->rq_auth_usr_root, req->rq_auth_usr_mdt, req->rq_flvr.sf_rpc); + req->rq_auth_usr_root, req->rq_auth_usr_mdt, req->rq_flvr.sf_rpc, + exp->exp_flvr.sf_rpc, + exp->exp_flvr_old[0].sf_rpc, + exp->exp_flvr_expire[0] ? + (unsigned long) (exp->exp_flvr_expire[0] - + cfs_time_current_sec()) : 0, + exp->exp_flvr_old[1].sf_rpc, + exp->exp_flvr_expire[1] ? + (unsigned long) (exp->exp_flvr_expire[1] - + cfs_time_current_sec()) : 0); return -EACCES; } +EXPORT_SYMBOL(sptlrpc_target_export_check); void sptlrpc_target_update_exp_flavor(struct obd_device *obd, struct sptlrpc_rule_set *rset) @@ -1652,34 +1945,35 @@ void sptlrpc_target_update_exp_flavor(struct obd_device *obd, LASSERT(obd); - spin_lock(&obd->obd_dev_lock); + cfs_spin_lock(&obd->obd_dev_lock); - list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) { + cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) { if (exp->exp_connection == NULL) continue; /* note if this export had just been updated flavor * (exp_flvr_changed == 1), this will override the * previous one. */ - spin_lock(&exp->exp_lock); - sptlrpc_rule_set_choose(rset, exp->exp_sp_peer, - exp->exp_connection->c_peer.nid, - &new_flvr); + cfs_spin_lock(&exp->exp_lock); + sptlrpc_target_choose_flavor(rset, exp->exp_sp_peer, + exp->exp_connection->c_peer.nid, + &new_flvr); if (exp->exp_flvr_changed || - memcmp(&new_flvr, &exp->exp_flvr, sizeof(new_flvr))) { + !flavor_equal(&new_flvr, &exp->exp_flvr)) { exp->exp_flvr_old[1] = new_flvr; exp->exp_flvr_expire[1] = 0; exp->exp_flvr_changed = 1; exp->exp_flvr_adapt = 1; + CDEBUG(D_SEC, "exp %p (%s): updated flavor %x->%x\n", exp, sptlrpc_part2name(exp->exp_sp_peer), exp->exp_flvr.sf_rpc, exp->exp_flvr_old[1].sf_rpc); } - spin_unlock(&exp->exp_lock); + cfs_spin_unlock(&exp->exp_lock); } - spin_unlock(&obd->obd_dev_lock); + cfs_spin_unlock(&obd->obd_dev_lock); } EXPORT_SYMBOL(sptlrpc_target_update_exp_flavor); @@ -1692,6 +1986,7 @@ static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc) case LUSTRE_SP_CLI: case LUSTRE_SP_MDT: case LUSTRE_SP_OST: + case LUSTRE_SP_MGC: case LUSTRE_SP_MGS: case LUSTRE_SP_ANY: break; @@ -1726,50 +2021,49 @@ static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc) return svc_rc; } +/** + * Used by ptlrpc server, to perform transformation upon request message of + * incoming \a req. This must be the first thing to do with a incoming + * request in ptlrpc layer. + * + * \retval SECSVC_OK success, and req->rq_reqmsg point to request message in + * clear text, size is req->rq_reqlen; also req->rq_svc_ctx is set. + * \retval SECSVC_COMPLETE success, the request has been fully processed, and + * reply message has been prepared. + * \retval SECSVC_DROP failed, this request should be dropped. + */ int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req) { struct ptlrpc_sec_policy *policy; - struct lustre_msg *msg = req->rq_reqbuf; - int rc; + struct lustre_msg *msg = req->rq_reqbuf; + int rc; ENTRY; LASSERT(msg); LASSERT(req->rq_reqmsg == NULL); LASSERT(req->rq_repmsg == NULL); + LASSERT(req->rq_svc_ctx == NULL); - req->rq_sp_from = LUSTRE_SP_ANY; - req->rq_auth_uid = INVALID_UID; - req->rq_auth_mapped_uid = INVALID_UID; + req->rq_req_swab_mask = 0; - if (req->rq_reqdata_len < sizeof(struct lustre_msg)) { - CERROR("request size %d too small\n", req->rq_reqdata_len); + rc = __lustre_unpack_msg(msg, req->rq_reqdata_len); + switch (rc) { + case 1: + lustre_set_req_swabbed(req, MSG_PTLRPC_HEADER_OFF); + case 0: + break; + default: + CERROR("error unpacking request from %s x"LPU64"\n", + libcfs_id2str(req->rq_peer), req->rq_xid); RETURN(SECSVC_DROP); } - if (msg->lm_magic == LUSTRE_MSG_MAGIC_V1 || - msg->lm_magic == LUSTRE_MSG_MAGIC_V1_SWABBED) { - /* - * v1 message, treat as to be null - */ - req->rq_flvr.sf_rpc = SPTLRPC_FLVR_NULL; - } else { - /* - * v2 message. - */ - if (msg->lm_magic == LUSTRE_MSG_MAGIC_V2) - req->rq_flvr.sf_rpc = WIRE_FLVR_RPC(msg->lm_secflvr); - else - req->rq_flvr.sf_rpc = WIRE_FLVR_RPC( - __swab32(msg->lm_secflvr)); - - /* unpack the wrapper message if the policy is not null */ - if ((RPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != - SPTLRPC_POLICY_NULL) && - lustre_unpack_msg(msg, req->rq_reqdata_len)) - RETURN(SECSVC_DROP); - } + req->rq_flvr.sf_rpc = WIRE_FLVR(msg->lm_secflvr); + req->rq_sp_from = LUSTRE_SP_ANY; + req->rq_auth_uid = INVALID_UID; + req->rq_auth_mapped_uid = INVALID_UID; - policy = sptlrpc_rpcflavor2policy(req->rq_flvr.sf_rpc); + policy = sptlrpc_wireflavor2policy(req->rq_flvr.sf_rpc); if (!policy) { CERROR("unsupported rpc flavor %x\n", req->rq_flvr.sf_rpc); RETURN(SECSVC_DROP); @@ -1777,29 +2071,28 @@ int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req) LASSERT(policy->sp_sops->accept); rc = policy->sp_sops->accept(req); - - LASSERT(req->rq_reqmsg || rc != SECSVC_OK); sptlrpc_policy_put(policy); + LASSERT(req->rq_reqmsg || rc != SECSVC_OK); + LASSERT(req->rq_svc_ctx || rc == SECSVC_DROP); + + /* + * if it's not null flavor (which means embedded packing msg), + * reset the swab mask for the comming inner msg unpacking. + */ + if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL) + req->rq_req_swab_mask = 0; /* sanity check for the request source */ rc = sptlrpc_svc_check_from(req, rc); - - /* FIXME move to proper place */ - if (rc == SECSVC_OK) { - __u32 opc = lustre_msg_get_opc(req->rq_reqmsg); - - if (opc == OST_WRITE) - req->rq_bulk_write = 1; - else if (opc == OST_READ) - req->rq_bulk_read = 1; - } - - LASSERT(req->rq_svc_ctx || rc == SECSVC_DROP); RETURN(rc); } -int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, - int msglen) +/** + * Used by ptlrpc server, to allocate reply buffer for \a req. If succeed, + * req->rq_reply_state is set, and req->rq_reply_state->rs_msg point to + * a buffer of \a msglen size. + */ +int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen) { struct ptlrpc_sec_policy *policy; struct ptlrpc_reply_state *rs; @@ -1833,6 +2126,12 @@ int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, RETURN(rc); } +/** + * Used by ptlrpc server, to perform transformation upon reply message. + * + * \post req->rq_reply_off is set to approriate server-controlled reply offset. + * \post req->rq_repmsg and req->rq_reply_state->rs_msg becomes inaccessible. + */ int sptlrpc_svc_wrap_reply(struct ptlrpc_request *req) { struct ptlrpc_sec_policy *policy; @@ -1851,6 +2150,9 @@ int sptlrpc_svc_wrap_reply(struct ptlrpc_request *req) RETURN(rc); } +/** + * Used by ptlrpc server, to free reply_state. + */ void sptlrpc_svc_free_rs(struct ptlrpc_reply_state *rs) { struct ptlrpc_sec_policy *policy; @@ -1878,8 +2180,8 @@ void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req) if (ctx == NULL) return; - LASSERT(atomic_read(&ctx->sc_refcount) > 0); - atomic_inc(&ctx->sc_refcount); + LASSERT(cfs_atomic_read(&ctx->sc_refcount) > 0); + cfs_atomic_inc(&ctx->sc_refcount); } void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req) @@ -1889,8 +2191,8 @@ void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req) if (ctx == NULL) return; - LASSERT(atomic_read(&ctx->sc_refcount) > 0); - if (atomic_dec_and_test(&ctx->sc_refcount)) { + LASSERT(cfs_atomic_read(&ctx->sc_refcount) > 0); + if (cfs_atomic_dec_and_test(&ctx->sc_refcount)) { if (ctx->sc_policy->sp_sops->free_ctx) ctx->sc_policy->sp_sops->free_ctx(ctx); } @@ -1904,7 +2206,7 @@ void sptlrpc_svc_ctx_invalidate(struct ptlrpc_request *req) if (ctx == NULL) return; - LASSERT(atomic_read(&ctx->sc_refcount) > 0); + LASSERT(cfs_atomic_read(&ctx->sc_refcount) > 0); if (ctx->sc_policy->sp_sops->invalidate_ctx) ctx->sc_policy->sp_sops->invalidate_ctx(ctx); } @@ -1914,16 +2216,20 @@ EXPORT_SYMBOL(sptlrpc_svc_ctx_invalidate); * bulk security * ****************************************/ +/** + * Perform transformation upon bulk data pointed by \a desc. This is called + * before transforming the request message. + */ int sptlrpc_cli_wrap_bulk(struct ptlrpc_request *req, struct ptlrpc_bulk_desc *desc) { struct ptlrpc_cli_ctx *ctx; + LASSERT(req->rq_bulk_read || req->rq_bulk_write); + if (!req->rq_pack_bulk) return 0; - LASSERT(req->rq_bulk_read || req->rq_bulk_write); - ctx = req->rq_cli_ctx; if (ctx->cc_ops->wrap_bulk) return ctx->cc_ops->wrap_bulk(ctx, req, desc); @@ -1931,92 +2237,81 @@ int sptlrpc_cli_wrap_bulk(struct ptlrpc_request *req, } EXPORT_SYMBOL(sptlrpc_cli_wrap_bulk); -static -void pga_to_bulk_desc(int nob, obd_count pg_count, struct brw_page **pga, - struct ptlrpc_bulk_desc *desc) -{ - int i; - - LASSERT(pga); - LASSERT(*pga); - - for (i = 0; i < pg_count && nob > 0; i++) { -#ifdef __KERNEL__ - desc->bd_iov[i].kiov_page = pga[i]->pg; - desc->bd_iov[i].kiov_len = pga[i]->count > nob ? - nob : pga[i]->count; - desc->bd_iov[i].kiov_offset = pga[i]->off & ~CFS_PAGE_MASK; -#else -#warning FIXME for liblustre! - desc->bd_iov[i].iov_base = pga[i]->pg->addr; - desc->bd_iov[i].iov_len = pga[i]->count > nob ? - nob : pga[i]->count; -#endif - - desc->bd_iov_count++; - nob -= pga[i]->count; - } -} - +/** + * This is called after unwrap the reply message. + * return nob of actual plain text size received, or error code. + */ int sptlrpc_cli_unwrap_bulk_read(struct ptlrpc_request *req, - int nob, obd_count pg_count, - struct brw_page **pga) + struct ptlrpc_bulk_desc *desc, + int nob) { - struct ptlrpc_bulk_desc *desc; - struct ptlrpc_cli_ctx *ctx; - int rc = 0; - - if (!req->rq_pack_bulk) - return 0; + struct ptlrpc_cli_ctx *ctx; + int rc; LASSERT(req->rq_bulk_read && !req->rq_bulk_write); - OBD_ALLOC(desc, offsetof(struct ptlrpc_bulk_desc, bd_iov[pg_count])); - if (desc == NULL) { - CERROR("out of memory, can't verify bulk read data\n"); - return -ENOMEM; - } - - pga_to_bulk_desc(nob, pg_count, pga, desc); + if (!req->rq_pack_bulk) + return desc->bd_nob_transferred; ctx = req->rq_cli_ctx; - if (ctx->cc_ops->unwrap_bulk) + if (ctx->cc_ops->unwrap_bulk) { rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); - - OBD_FREE(desc, offsetof(struct ptlrpc_bulk_desc, bd_iov[pg_count])); - - return rc; + if (rc < 0) + return rc; + } + return desc->bd_nob_transferred; } EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_read); +/** + * This is called after unwrap the reply message. + * return 0 for success or error code. + */ int sptlrpc_cli_unwrap_bulk_write(struct ptlrpc_request *req, struct ptlrpc_bulk_desc *desc) { - struct ptlrpc_cli_ctx *ctx; + struct ptlrpc_cli_ctx *ctx; + int rc; + + LASSERT(!req->rq_bulk_read && req->rq_bulk_write); if (!req->rq_pack_bulk) return 0; - LASSERT(!req->rq_bulk_read && req->rq_bulk_write); - ctx = req->rq_cli_ctx; - if (ctx->cc_ops->unwrap_bulk) - return ctx->cc_ops->unwrap_bulk(ctx, req, desc); + if (ctx->cc_ops->unwrap_bulk) { + rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); + if (rc < 0) + return rc; + } + + /* + * if everything is going right, nob should equals to nob_transferred. + * in case of privacy mode, nob_transferred needs to be adjusted. + */ + if (desc->bd_nob != desc->bd_nob_transferred) { + CERROR("nob %d doesn't match transferred nob %d", + desc->bd_nob, desc->bd_nob_transferred); + return -EPROTO; + } return 0; } EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_write); +/** + * Performe transformation upon outgoing bulk read. + */ int sptlrpc_svc_wrap_bulk(struct ptlrpc_request *req, struct ptlrpc_bulk_desc *desc) { struct ptlrpc_svc_ctx *ctx; + LASSERT(req->rq_bulk_read); + if (!req->rq_pack_bulk) return 0; - LASSERT(req->rq_bulk_read || req->rq_bulk_write); - ctx = req->rq_svc_ctx; if (ctx->sc_policy->sp_sops->wrap_bulk) return ctx->sc_policy->sp_sops->wrap_bulk(req, desc); @@ -2025,24 +2320,65 @@ int sptlrpc_svc_wrap_bulk(struct ptlrpc_request *req, } EXPORT_SYMBOL(sptlrpc_svc_wrap_bulk); +/** + * Performe transformation upon incoming bulk write. + */ int sptlrpc_svc_unwrap_bulk(struct ptlrpc_request *req, struct ptlrpc_bulk_desc *desc) { struct ptlrpc_svc_ctx *ctx; + int rc; + + LASSERT(req->rq_bulk_write); + + /* + * if it's in privacy mode, transferred should >= expected; otherwise + * transferred should == expected. + */ + if (desc->bd_nob_transferred < desc->bd_nob || + (desc->bd_nob_transferred > desc->bd_nob && + SPTLRPC_FLVR_BULK_SVC(req->rq_flvr.sf_rpc) != + SPTLRPC_BULK_SVC_PRIV)) { + DEBUG_REQ(D_ERROR, req, "truncated bulk GET %d(%d)", + desc->bd_nob_transferred, desc->bd_nob); + return -ETIMEDOUT; + } if (!req->rq_pack_bulk) return 0; - LASSERT(req->rq_bulk_read || req->rq_bulk_write); - ctx = req->rq_svc_ctx; - if (ctx->sc_policy->sp_sops->unwrap_bulk); - return ctx->sc_policy->sp_sops->unwrap_bulk(req, desc); + if (ctx->sc_policy->sp_sops->unwrap_bulk) { + rc = ctx->sc_policy->sp_sops->unwrap_bulk(req, desc); + if (rc) + CERROR("error unwrap bulk: %d\n", rc); + } + /* return 0 to allow reply be sent */ return 0; } EXPORT_SYMBOL(sptlrpc_svc_unwrap_bulk); +/** + * Prepare buffers for incoming bulk write. + */ +int sptlrpc_svc_prep_bulk(struct ptlrpc_request *req, + struct ptlrpc_bulk_desc *desc) +{ + struct ptlrpc_svc_ctx *ctx; + + LASSERT(req->rq_bulk_write); + + if (!req->rq_pack_bulk) + return 0; + + ctx = req->rq_svc_ctx; + if (ctx->sc_policy->sp_sops->prep_bulk) + return ctx->sc_policy->sp_sops->prep_bulk(req, desc); + + return 0; +} +EXPORT_SYMBOL(sptlrpc_svc_prep_bulk); /**************************************** * user descriptor helpers * @@ -2070,18 +2406,18 @@ int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset) pud = lustre_msg_buf(msg, offset, 0); - pud->pud_uid = cfs_current()->uid; - pud->pud_gid = cfs_current()->gid; - pud->pud_fsuid = cfs_current()->fsuid; - pud->pud_fsgid = cfs_current()->fsgid; - pud->pud_cap = cfs_current()->cap_effective; + pud->pud_uid = cfs_curproc_uid(); + pud->pud_gid = cfs_curproc_gid(); + pud->pud_fsuid = cfs_curproc_fsuid(); + pud->pud_fsgid = cfs_curproc_fsgid(); + pud->pud_cap = cfs_curproc_cap_pack(); pud->pud_ngroups = (msg->lm_buflens[offset] - sizeof(*pud)) / 4; #ifdef __KERNEL__ task_lock(current); if (pud->pud_ngroups > current_ngroups) pud->pud_ngroups = current_ngroups; - memcpy(pud->pud_groups, cfs_current()->group_info->blocks[0], + memcpy(pud->pud_groups, current_cred()->group_info->blocks[0], pud->pud_ngroups * sizeof(__u32)); task_unlock(current); #endif @@ -2090,7 +2426,7 @@ int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset) } EXPORT_SYMBOL(sptlrpc_pack_user_desc); -int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset) +int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset, int swabbed) { struct ptlrpc_user_desc *pud; int i; @@ -2099,7 +2435,7 @@ int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset) if (!pud) return -EINVAL; - if (lustre_msg_swabbed(msg)) { + if (swabbed) { __swab32s(&pud->pud_uid); __swab32s(&pud->pud_gid); __swab32s(&pud->pud_fsuid); @@ -2120,7 +2456,7 @@ int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset) return -EINVAL; } - if (lustre_msg_swabbed(msg)) { + if (swabbed) { for (i = 0; i < pud->pud_ngroups; i++) __swab32s(&pud->pud_groups[i]); } @@ -2143,39 +2479,25 @@ const char * sec2target_str(struct ptlrpc_sec *sec) } EXPORT_SYMBOL(sec2target_str); +/* + * return true if the bulk data is protected + */ +int sptlrpc_flavor_has_bulk(struct sptlrpc_flavor *flvr) +{ + switch (SPTLRPC_FLVR_BULK_SVC(flvr->sf_rpc)) { + case SPTLRPC_BULK_SVC_INTG: + case SPTLRPC_BULK_SVC_PRIV: + return 1; + default: + return 0; + } +} +EXPORT_SYMBOL(sptlrpc_flavor_has_bulk); + /**************************************** * crypto API helper/alloc blkciper * ****************************************/ -#ifdef __KERNEL__ -#ifndef HAVE_ASYNC_BLOCK_CIPHER -struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname, - u32 type, u32 mask) -{ - char buf[CRYPTO_MAX_ALG_NAME + 1]; - const char *pan = algname; - u32 flag = 0; - - if (strncmp("cbc(", algname, 4) == 0) - flag |= CRYPTO_TFM_MODE_CBC; - else if (strncmp("ecb(", algname, 4) == 0) - flag |= CRYPTO_TFM_MODE_ECB; - if (flag) { - char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')'); - if (vp) { - memcpy(buf, algname + 4, vp - algname - 4); - buf[vp - algname - 4] = '\0'; - pan = buf; - } else { - flag = 0; - } - } - return crypto_alloc_tfm(pan, flag); -} -EXPORT_SYMBOL(ll_crypto_alloc_blkcipher); -#endif -#endif - /**************************************** * initialize/finalize * ****************************************/ @@ -2184,14 +2506,20 @@ int __init sptlrpc_init(void) { int rc; - rc = sptlrpc_gc_start_thread(); + cfs_rwlock_init(&policy_lock); + + rc = sptlrpc_gc_init(); if (rc) goto out; - rc = sptlrpc_enc_pool_init(); + rc = sptlrpc_conf_init(); if (rc) goto out_gc; + rc = sptlrpc_enc_pool_init(); + if (rc) + goto out_conf; + rc = sptlrpc_null_init(); if (rc) goto out_pool; @@ -2212,8 +2540,10 @@ out_null: sptlrpc_null_fini(); out_pool: sptlrpc_enc_pool_fini(); +out_conf: + sptlrpc_conf_fini(); out_gc: - sptlrpc_gc_stop_thread(); + sptlrpc_gc_fini(); out: return rc; } @@ -2224,5 +2554,6 @@ void __exit sptlrpc_fini(void) sptlrpc_plain_fini(); sptlrpc_null_fini(); sptlrpc_enc_pool_fini(); - sptlrpc_gc_stop_thread(); + sptlrpc_conf_fini(); + sptlrpc_gc_fini(); }