2348 lines
59 KiB
C
2348 lines
59 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2011, 2012, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*
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* lustre/ptlrpc/sec.c
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*
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* Author: Eric Mei <ericm@clusterfs.com>
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*/
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#define DEBUG_SUBSYSTEM S_SEC
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#include "../../include/linux/libcfs/libcfs.h"
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#include <linux/crypto.h>
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#include <linux/key.h>
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#include "../include/obd.h"
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#include "../include/obd_class.h"
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#include "../include/obd_support.h"
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#include "../include/lustre_net.h"
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#include "../include/lustre_import.h"
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#include "../include/lustre_dlm.h"
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#include "../include/lustre_sec.h"
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#include "ptlrpc_internal.h"
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/***********************************************
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* policy registers *
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***********************************************/
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static rwlock_t policy_lock;
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static struct ptlrpc_sec_policy *policies[SPTLRPC_POLICY_MAX] = {
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NULL,
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};
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int sptlrpc_register_policy(struct ptlrpc_sec_policy *policy)
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{
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__u16 number = policy->sp_policy;
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LASSERT(policy->sp_name);
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LASSERT(policy->sp_cops);
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LASSERT(policy->sp_sops);
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if (number >= SPTLRPC_POLICY_MAX)
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return -EINVAL;
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write_lock(&policy_lock);
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if (unlikely(policies[number])) {
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write_unlock(&policy_lock);
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return -EALREADY;
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}
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policies[number] = policy;
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write_unlock(&policy_lock);
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CDEBUG(D_SEC, "%s: registered\n", policy->sp_name);
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return 0;
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}
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EXPORT_SYMBOL(sptlrpc_register_policy);
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int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy)
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{
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__u16 number = policy->sp_policy;
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LASSERT(number < SPTLRPC_POLICY_MAX);
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write_lock(&policy_lock);
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if (unlikely(!policies[number])) {
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write_unlock(&policy_lock);
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CERROR("%s: already unregistered\n", policy->sp_name);
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return -EINVAL;
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}
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LASSERT(policies[number] == policy);
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policies[number] = NULL;
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write_unlock(&policy_lock);
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CDEBUG(D_SEC, "%s: unregistered\n", policy->sp_name);
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return 0;
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}
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EXPORT_SYMBOL(sptlrpc_unregister_policy);
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static
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struct ptlrpc_sec_policy *sptlrpc_wireflavor2policy(__u32 flavor)
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{
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static DEFINE_MUTEX(load_mutex);
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static atomic_t loaded = ATOMIC_INIT(0);
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struct ptlrpc_sec_policy *policy;
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__u16 number = SPTLRPC_FLVR_POLICY(flavor);
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__u16 flag = 0;
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if (number >= SPTLRPC_POLICY_MAX)
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return NULL;
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while (1) {
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read_lock(&policy_lock);
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policy = policies[number];
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if (policy && !try_module_get(policy->sp_owner))
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policy = NULL;
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if (!policy)
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flag = atomic_read(&loaded);
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read_unlock(&policy_lock);
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if (policy || flag != 0 ||
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number != SPTLRPC_POLICY_GSS)
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break;
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/* try to load gss module, once */
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mutex_lock(&load_mutex);
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if (atomic_read(&loaded) == 0) {
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if (request_module("ptlrpc_gss") == 0)
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CDEBUG(D_SEC,
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"module ptlrpc_gss loaded on demand\n");
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else
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CERROR("Unable to load module ptlrpc_gss\n");
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atomic_set(&loaded, 1);
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}
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mutex_unlock(&load_mutex);
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}
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return policy;
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}
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__u32 sptlrpc_name2flavor_base(const char *name)
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{
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if (!strcmp(name, "null"))
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return SPTLRPC_FLVR_NULL;
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if (!strcmp(name, "plain"))
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return SPTLRPC_FLVR_PLAIN;
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if (!strcmp(name, "krb5n"))
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return SPTLRPC_FLVR_KRB5N;
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if (!strcmp(name, "krb5a"))
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return SPTLRPC_FLVR_KRB5A;
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if (!strcmp(name, "krb5i"))
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return SPTLRPC_FLVR_KRB5I;
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if (!strcmp(name, "krb5p"))
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return SPTLRPC_FLVR_KRB5P;
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return SPTLRPC_FLVR_INVALID;
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}
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EXPORT_SYMBOL(sptlrpc_name2flavor_base);
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const char *sptlrpc_flavor2name_base(__u32 flvr)
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{
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__u32 base = SPTLRPC_FLVR_BASE(flvr);
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if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL))
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return "null";
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else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN))
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return "plain";
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else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5N))
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return "krb5n";
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else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5A))
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return "krb5a";
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else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5I))
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return "krb5i";
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else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5P))
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return "krb5p";
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CERROR("invalid wire flavor 0x%x\n", flvr);
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return "invalid";
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}
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EXPORT_SYMBOL(sptlrpc_flavor2name_base);
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char *sptlrpc_flavor2name_bulk(struct sptlrpc_flavor *sf,
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char *buf, int bufsize)
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{
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if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN)
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snprintf(buf, bufsize, "hash:%s",
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sptlrpc_get_hash_name(sf->u_bulk.hash.hash_alg));
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else
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snprintf(buf, bufsize, "%s",
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sptlrpc_flavor2name_base(sf->sf_rpc));
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buf[bufsize - 1] = '\0';
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return buf;
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}
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EXPORT_SYMBOL(sptlrpc_flavor2name_bulk);
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char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize)
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{
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strlcpy(buf, sptlrpc_flavor2name_base(sf->sf_rpc), bufsize);
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/*
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* currently we don't support customized bulk specification for
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* flavors other than plain
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*/
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if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) {
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char bspec[16];
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bspec[0] = '-';
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sptlrpc_flavor2name_bulk(sf, &bspec[1], sizeof(bspec) - 1);
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strlcat(buf, bspec, bufsize);
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}
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return buf;
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}
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EXPORT_SYMBOL(sptlrpc_flavor2name);
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static char *sptlrpc_secflags2str(__u32 flags, char *buf, int bufsize)
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{
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buf[0] = '\0';
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if (flags & PTLRPC_SEC_FL_REVERSE)
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strlcat(buf, "reverse,", bufsize);
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if (flags & PTLRPC_SEC_FL_ROOTONLY)
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strlcat(buf, "rootonly,", bufsize);
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if (flags & PTLRPC_SEC_FL_UDESC)
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strlcat(buf, "udesc,", bufsize);
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if (flags & PTLRPC_SEC_FL_BULK)
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strlcat(buf, "bulk,", bufsize);
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if (buf[0] == '\0')
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strlcat(buf, "-,", bufsize);
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return buf;
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}
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/**************************************************
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* client context APIs *
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**************************************************/
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static
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struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec)
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{
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struct vfs_cred vcred;
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int create = 1, remove_dead = 1;
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LASSERT(sec);
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LASSERT(sec->ps_policy->sp_cops->lookup_ctx);
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if (sec->ps_flvr.sf_flags & (PTLRPC_SEC_FL_REVERSE |
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PTLRPC_SEC_FL_ROOTONLY)) {
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vcred.vc_uid = 0;
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vcred.vc_gid = 0;
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if (sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_REVERSE) {
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create = 0;
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remove_dead = 0;
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}
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} else {
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vcred.vc_uid = from_kuid(&init_user_ns, current_uid());
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vcred.vc_gid = from_kgid(&init_user_ns, current_gid());
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}
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return sec->ps_policy->sp_cops->lookup_ctx(sec, &vcred,
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create, remove_dead);
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}
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struct ptlrpc_cli_ctx *sptlrpc_cli_ctx_get(struct ptlrpc_cli_ctx *ctx)
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{
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atomic_inc(&ctx->cc_refcount);
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return ctx;
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}
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EXPORT_SYMBOL(sptlrpc_cli_ctx_get);
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void sptlrpc_cli_ctx_put(struct ptlrpc_cli_ctx *ctx, int sync)
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{
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struct ptlrpc_sec *sec = ctx->cc_sec;
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LASSERT(sec);
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LASSERT_ATOMIC_POS(&ctx->cc_refcount);
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if (!atomic_dec_and_test(&ctx->cc_refcount))
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return;
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sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync);
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}
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EXPORT_SYMBOL(sptlrpc_cli_ctx_put);
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static int import_sec_check_expire(struct obd_import *imp)
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{
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int adapt = 0;
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spin_lock(&imp->imp_lock);
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if (imp->imp_sec_expire &&
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imp->imp_sec_expire < ktime_get_real_seconds()) {
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adapt = 1;
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imp->imp_sec_expire = 0;
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}
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spin_unlock(&imp->imp_lock);
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if (!adapt)
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return 0;
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CDEBUG(D_SEC, "found delayed sec adapt expired, do it now\n");
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return sptlrpc_import_sec_adapt(imp, NULL, NULL);
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}
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static int import_sec_validate_get(struct obd_import *imp,
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struct ptlrpc_sec **sec)
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{
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int rc;
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if (unlikely(imp->imp_sec_expire)) {
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rc = import_sec_check_expire(imp);
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if (rc)
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return rc;
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}
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*sec = sptlrpc_import_sec_ref(imp);
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if (!*sec) {
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CERROR("import %p (%s) with no sec\n",
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imp, ptlrpc_import_state_name(imp->imp_state));
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return -EACCES;
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}
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if (unlikely((*sec)->ps_dying)) {
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CERROR("attempt to use dying sec %p\n", sec);
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sptlrpc_sec_put(*sec);
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return -EACCES;
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}
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return 0;
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}
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/**
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* Given a \a req, find or allocate a appropriate context for it.
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* \pre req->rq_cli_ctx == NULL.
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*
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* \retval 0 succeed, and req->rq_cli_ctx is set.
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* \retval -ev error number, and req->rq_cli_ctx == NULL.
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*/
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int sptlrpc_req_get_ctx(struct ptlrpc_request *req)
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{
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struct obd_import *imp = req->rq_import;
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struct ptlrpc_sec *sec;
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int rc;
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LASSERT(!req->rq_cli_ctx);
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LASSERT(imp);
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rc = import_sec_validate_get(imp, &sec);
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if (rc)
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return rc;
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req->rq_cli_ctx = get_my_ctx(sec);
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sptlrpc_sec_put(sec);
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if (!req->rq_cli_ctx) {
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CERROR("req %p: fail to get context\n", req);
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return -ENOMEM;
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}
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return 0;
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}
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/**
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* Drop the context for \a req.
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* \pre req->rq_cli_ctx != NULL.
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* \post req->rq_cli_ctx == NULL.
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*
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* If \a sync == 0, this function should return quickly without sleep;
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* otherwise it might trigger and wait for the whole process of sending
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* an context-destroying rpc to server.
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*/
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void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync)
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{
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LASSERT(req);
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LASSERT(req->rq_cli_ctx);
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/* request might be asked to release earlier while still
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* in the context waiting list.
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*/
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if (!list_empty(&req->rq_ctx_chain)) {
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spin_lock(&req->rq_cli_ctx->cc_lock);
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list_del_init(&req->rq_ctx_chain);
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spin_unlock(&req->rq_cli_ctx->cc_lock);
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}
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sptlrpc_cli_ctx_put(req->rq_cli_ctx, sync);
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req->rq_cli_ctx = NULL;
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}
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static
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int sptlrpc_req_ctx_switch(struct ptlrpc_request *req,
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struct ptlrpc_cli_ctx *oldctx,
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struct ptlrpc_cli_ctx *newctx)
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{
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struct sptlrpc_flavor old_flvr;
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char *reqmsg = NULL; /* to workaround old gcc */
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int reqmsg_size;
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int rc = 0;
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LASSERT(req->rq_reqmsg);
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LASSERT(req->rq_reqlen);
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LASSERT(req->rq_replen);
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CDEBUG(D_SEC, "req %p: switch ctx %p(%u->%s) -> %p(%u->%s), switch sec %p(%s) -> %p(%s)\n",
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req,
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oldctx, oldctx->cc_vcred.vc_uid, sec2target_str(oldctx->cc_sec),
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newctx, newctx->cc_vcred.vc_uid, sec2target_str(newctx->cc_sec),
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oldctx->cc_sec, oldctx->cc_sec->ps_policy->sp_name,
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newctx->cc_sec, newctx->cc_sec->ps_policy->sp_name);
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/* save flavor */
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old_flvr = req->rq_flvr;
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/* save request message */
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reqmsg_size = req->rq_reqlen;
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if (reqmsg_size != 0) {
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reqmsg = libcfs_kvzalloc(reqmsg_size, GFP_NOFS);
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if (!reqmsg)
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return -ENOMEM;
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memcpy(reqmsg, req->rq_reqmsg, reqmsg_size);
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}
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/* release old req/rep buf */
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req->rq_cli_ctx = oldctx;
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sptlrpc_cli_free_reqbuf(req);
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sptlrpc_cli_free_repbuf(req);
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req->rq_cli_ctx = newctx;
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/* recalculate the flavor */
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sptlrpc_req_set_flavor(req, 0);
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/* alloc new request buffer
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* we don't need to alloc reply buffer here, leave it to the
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* rest procedure of ptlrpc
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*/
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if (reqmsg_size != 0) {
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rc = sptlrpc_cli_alloc_reqbuf(req, reqmsg_size);
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if (!rc) {
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LASSERT(req->rq_reqmsg);
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memcpy(req->rq_reqmsg, reqmsg, reqmsg_size);
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} else {
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CWARN("failed to alloc reqbuf: %d\n", rc);
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req->rq_flvr = old_flvr;
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}
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kvfree(reqmsg);
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}
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return rc;
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}
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/**
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* If current context of \a req is dead somehow, e.g. we just switched flavor
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* thus marked original contexts dead, we'll find a new context for it. if
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* no switch is needed, \a req will end up with the same context.
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*
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* \note a request must have a context, to keep other parts of code happy.
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* In any case of failure during the switching, we must restore the old one.
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*/
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static int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req)
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{
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struct ptlrpc_cli_ctx *oldctx = req->rq_cli_ctx;
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struct ptlrpc_cli_ctx *newctx;
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int rc;
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LASSERT(oldctx);
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sptlrpc_cli_ctx_get(oldctx);
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sptlrpc_req_put_ctx(req, 0);
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rc = sptlrpc_req_get_ctx(req);
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if (unlikely(rc)) {
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LASSERT(!req->rq_cli_ctx);
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/* restore old ctx */
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req->rq_cli_ctx = oldctx;
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return rc;
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}
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newctx = req->rq_cli_ctx;
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LASSERT(newctx);
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if (unlikely(newctx == oldctx &&
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test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags))) {
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/*
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* still get the old dead ctx, usually means system too busy
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*/
|
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CDEBUG(D_SEC,
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|
"ctx (%p, fl %lx) doesn't switch, relax a little bit\n",
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|
newctx, newctx->cc_flags);
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|
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set_current_state(TASK_INTERRUPTIBLE);
|
|
schedule_timeout(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 */
|
|
sptlrpc_req_put_ctx(req, 0);
|
|
req->rq_cli_ctx = oldctx;
|
|
return rc;
|
|
}
|
|
|
|
LASSERT(req->rq_cli_ctx == newctx);
|
|
}
|
|
|
|
sptlrpc_cli_ctx_put(oldctx, 1);
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int ctx_check_refresh(struct ptlrpc_cli_ctx *ctx)
|
|
{
|
|
if (cli_ctx_is_refreshed(ctx))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int ctx_refresh_timeout(void *data)
|
|
{
|
|
struct ptlrpc_request *req = data;
|
|
int rc;
|
|
|
|
/* 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, 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.
|
|
* there's an assumption that expire time of the request should be
|
|
* later than the context refresh expire time.
|
|
*/
|
|
if (rc == 0)
|
|
req->rq_cli_ctx->cc_ops->force_die(req->rq_cli_ctx, 0);
|
|
return rc;
|
|
}
|
|
|
|
static
|
|
void ctx_refresh_interrupt(void *data)
|
|
{
|
|
struct ptlrpc_request *req = data;
|
|
|
|
spin_lock(&req->rq_lock);
|
|
req->rq_intr = 1;
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
*
|
|
* 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.
|
|
*
|
|
* \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;
|
|
|
|
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 null ctx), so each loop we need to re-check
|
|
* everything
|
|
*/
|
|
again:
|
|
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 (unlikely(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(ctx->cc_ops->validate);
|
|
if (ctx->cc_ops->validate(ctx) == 0) {
|
|
req_off_ctx_list(req, ctx);
|
|
return 0;
|
|
}
|
|
|
|
if (unlikely(test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags))) {
|
|
spin_lock(&req->rq_lock);
|
|
req->rq_err = 1;
|
|
spin_unlock(&req->rq_lock);
|
|
req_off_ctx_list(req, ctx);
|
|
return -EPERM;
|
|
}
|
|
|
|
/*
|
|
* 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 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; 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) &&
|
|
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))) {
|
|
req_off_ctx_list(req, ctx);
|
|
/*
|
|
* don't switch ctx if import was deactivated
|
|
*/
|
|
if (req->rq_import->imp_deactive) {
|
|
spin_lock(&req->rq_lock);
|
|
req->rq_err = 1;
|
|
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);
|
|
spin_lock(&req->rq_lock);
|
|
req->rq_err = 1;
|
|
spin_unlock(&req->rq_lock);
|
|
return rc;
|
|
}
|
|
|
|
ctx = req->rq_cli_ctx;
|
|
goto again;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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);
|
|
req->rq_err = 0;
|
|
req->rq_timedout = 0;
|
|
req->rq_resend = 0;
|
|
req->rq_restart = 0;
|
|
spin_unlock(&req->rq_lock);
|
|
|
|
lwi = LWI_TIMEOUT_INTR(timeout * HZ, ctx_refresh_timeout,
|
|
ctx_refresh_interrupt, req);
|
|
rc = l_wait_event(req->rq_reply_waitq, ctx_check_refresh(ctx), &lwi);
|
|
|
|
/*
|
|
* following cases could lead us here:
|
|
* - successfully refreshed;
|
|
* - 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 ptlrpc_client_wake_req(),
|
|
* e.g. ptlrpc_abort_inflight();
|
|
*/
|
|
if (!cli_ctx_is_refreshed(ctx)) {
|
|
/* timed out or interrupted */
|
|
req_off_ctx_list(req, ctx);
|
|
|
|
LASSERT(rc != 0);
|
|
return rc;
|
|
}
|
|
|
|
goto again;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode)
|
|
{
|
|
struct ptlrpc_sec *sec;
|
|
|
|
LASSERT(req->rq_import);
|
|
LASSERT(req->rq_cli_ctx);
|
|
LASSERT(req->rq_cli_ctx->cc_sec);
|
|
LASSERT(req->rq_bulk_read == 0 || req->rq_bulk_write == 0);
|
|
|
|
/* special security flags according to opcode */
|
|
switch (opcode) {
|
|
case OST_READ:
|
|
case MDS_READPAGE:
|
|
case MGS_CONFIG_READ:
|
|
case OBD_IDX_READ:
|
|
req->rq_bulk_read = 1;
|
|
break;
|
|
case OST_WRITE:
|
|
case MDS_WRITEPAGE:
|
|
req->rq_bulk_write = 1;
|
|
break;
|
|
case SEC_CTX_INIT:
|
|
req->rq_ctx_init = 1;
|
|
break;
|
|
case SEC_CTX_FINI:
|
|
req->rq_ctx_fini = 1;
|
|
break;
|
|
case 0:
|
|
/* init/fini rpc won't be resend, so can't be here */
|
|
LASSERT(req->rq_ctx_init == 0);
|
|
LASSERT(req->rq_ctx_fini == 0);
|
|
|
|
/* cleanup flags, which should be recalculated */
|
|
req->rq_pack_udesc = 0;
|
|
req->rq_pack_bulk = 0;
|
|
break;
|
|
}
|
|
|
|
sec = req->rq_cli_ctx->cc_sec;
|
|
|
|
spin_lock(&sec->ps_lock);
|
|
req->rq_flvr = sec->ps_flvr;
|
|
spin_unlock(&sec->ps_lock);
|
|
|
|
/* force SVC_NULL for context initiation rpc, SVC_INTG for context
|
|
* destruction rpc
|
|
*/
|
|
if (unlikely(req->rq_ctx_init))
|
|
flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_NULL);
|
|
else if (unlikely(req->rq_ctx_fini))
|
|
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) &&
|
|
(req->rq_flvr.sf_rpc != SPTLRPC_FLVR_NULL))
|
|
req->rq_pack_udesc = 1;
|
|
|
|
/* bulk security flag */
|
|
if ((req->rq_bulk_read || req->rq_bulk_write) &&
|
|
sptlrpc_flavor_has_bulk(&req->rq_flvr))
|
|
req->rq_pack_bulk = 1;
|
|
}
|
|
|
|
void sptlrpc_request_out_callback(struct ptlrpc_request *req)
|
|
{
|
|
if (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc) != SPTLRPC_SVC_PRIV)
|
|
return;
|
|
|
|
LASSERT(req->rq_clrbuf);
|
|
if (req->rq_pool || !req->rq_reqbuf)
|
|
return;
|
|
|
|
kfree(req->rq_reqbuf);
|
|
req->rq_reqbuf = NULL;
|
|
req->rq_reqbuf_len = 0;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct ptlrpc_sec *sec;
|
|
struct ptlrpc_cli_ctx *ctx;
|
|
struct ptlrpc_request *req = NULL;
|
|
int rc;
|
|
|
|
might_sleep();
|
|
|
|
sec = sptlrpc_import_sec_ref(imp);
|
|
ctx = get_my_ctx(sec);
|
|
sptlrpc_sec_put(sec);
|
|
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
if (cli_ctx_is_eternal(ctx) ||
|
|
ctx->cc_ops->validate(ctx) == 0) {
|
|
sptlrpc_cli_ctx_put(ctx, 1);
|
|
return 0;
|
|
}
|
|
|
|
if (cli_ctx_is_error(ctx)) {
|
|
sptlrpc_cli_ctx_put(ctx, 1);
|
|
return -EACCES;
|
|
}
|
|
|
|
req = ptlrpc_request_cache_alloc(GFP_NOFS);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&req->rq_lock);
|
|
atomic_set(&req->rq_refcount, 10000);
|
|
INIT_LIST_HEAD(&req->rq_ctx_chain);
|
|
init_waitqueue_head(&req->rq_reply_waitq);
|
|
init_waitqueue_head(&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));
|
|
sptlrpc_cli_ctx_put(req->rq_cli_ctx, 1);
|
|
ptlrpc_request_cache_free(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;
|
|
int rc = 0;
|
|
|
|
LASSERT(ctx);
|
|
LASSERT(ctx->cc_sec);
|
|
LASSERT(req->rq_reqbuf || req->rq_clrbuf);
|
|
|
|
/* we wrap bulk request here because now we can be sure
|
|
* the context is uptodate.
|
|
*/
|
|
if (req->rq_bulk) {
|
|
rc = sptlrpc_cli_wrap_bulk(req, req->rq_bulk);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) {
|
|
case SPTLRPC_SVC_NULL:
|
|
case SPTLRPC_SVC_AUTH:
|
|
case SPTLRPC_SVC_INTG:
|
|
LASSERT(ctx->cc_ops->sign);
|
|
rc = ctx->cc_ops->sign(ctx, req);
|
|
break;
|
|
case SPTLRPC_SVC_PRIV:
|
|
LASSERT(ctx->cc_ops->seal);
|
|
rc = ctx->cc_ops->seal(ctx, req);
|
|
break;
|
|
default:
|
|
LBUG();
|
|
}
|
|
|
|
if (rc == 0) {
|
|
LASSERT(req->rq_reqdata_len);
|
|
LASSERT(req->rq_reqdata_len % 8 == 0);
|
|
LASSERT(req->rq_reqdata_len <= req->rq_reqbuf_len);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int do_cli_unwrap_reply(struct ptlrpc_request *req)
|
|
{
|
|
struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx;
|
|
int rc;
|
|
|
|
LASSERT(ctx);
|
|
LASSERT(ctx->cc_sec);
|
|
LASSERT(req->rq_repbuf);
|
|
LASSERT(req->rq_repdata);
|
|
LASSERT(!req->rq_repmsg);
|
|
|
|
req->rq_rep_swab_mask = 0;
|
|
|
|
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%llu\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 (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 (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) {
|
|
case SPTLRPC_SVC_NULL:
|
|
case SPTLRPC_SVC_AUTH:
|
|
case SPTLRPC_SVC_INTG:
|
|
LASSERT(ctx->cc_ops->verify);
|
|
rc = ctx->cc_ops->verify(ctx, req);
|
|
break;
|
|
case SPTLRPC_SVC_PRIV:
|
|
LASSERT(ctx->cc_ops->unseal);
|
|
rc = ctx->cc_ops->unseal(ctx, req);
|
|
break;
|
|
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);
|
|
LASSERT(!req->rq_repmsg);
|
|
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;
|
|
|
|
early_req = ptlrpc_request_cache_alloc(GFP_NOFS);
|
|
if (!early_req)
|
|
return -ENOMEM;
|
|
|
|
early_size = req->rq_nob_received;
|
|
early_bufsz = size_roundup_power2(early_size);
|
|
early_buf = libcfs_kvzalloc(early_bufsz, GFP_NOFS);
|
|
if (!early_buf) {
|
|
rc = -ENOMEM;
|
|
goto err_req;
|
|
}
|
|
|
|
/* sanity checkings and copy data out, do it inside spinlock */
|
|
spin_lock(&req->rq_lock);
|
|
|
|
if (req->rq_replied) {
|
|
spin_unlock(&req->rq_lock);
|
|
rc = -EALREADY;
|
|
goto err_buf;
|
|
}
|
|
|
|
LASSERT(req->rq_repbuf);
|
|
LASSERT(!req->rq_repdata);
|
|
LASSERT(!req->rq_repmsg);
|
|
|
|
if (req->rq_reply_off != 0) {
|
|
CERROR("early reply with offset %u\n", req->rq_reply_off);
|
|
spin_unlock(&req->rq_lock);
|
|
rc = -EPROTO;
|
|
goto err_buf;
|
|
}
|
|
|
|
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);
|
|
spin_unlock(&req->rq_lock);
|
|
rc = -EINVAL;
|
|
goto err_buf;
|
|
}
|
|
|
|
if (req->rq_nob_received < sizeof(struct lustre_msg)) {
|
|
CERROR("early reply length %d too small\n",
|
|
req->rq_nob_received);
|
|
spin_unlock(&req->rq_lock);
|
|
rc = -EALREADY;
|
|
goto err_buf;
|
|
}
|
|
|
|
memcpy(early_buf, req->rq_repbuf, early_size);
|
|
spin_unlock(&req->rq_lock);
|
|
|
|
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;
|
|
}
|
|
|
|
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:
|
|
kvfree(early_buf);
|
|
err_req:
|
|
ptlrpc_request_cache_free(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);
|
|
kvfree(early_req->rq_repbuf);
|
|
ptlrpc_request_cache_free(early_req);
|
|
}
|
|
|
|
/**************************************************
|
|
* sec ID *
|
|
**************************************************/
|
|
|
|
/*
|
|
* "fixed" sec (e.g. null) use sec_id < 0
|
|
*/
|
|
static atomic_t sptlrpc_sec_id = ATOMIC_INIT(1);
|
|
|
|
int sptlrpc_get_next_secid(void)
|
|
{
|
|
return atomic_inc_return(&sptlrpc_sec_id);
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_get_next_secid);
|
|
|
|
/**************************************************
|
|
* client side high-level security APIs *
|
|
**************************************************/
|
|
|
|
static int sec_cop_flush_ctx_cache(struct ptlrpc_sec *sec, uid_t uid,
|
|
int grace, int force)
|
|
{
|
|
struct ptlrpc_sec_policy *policy = sec->ps_policy;
|
|
|
|
LASSERT(policy->sp_cops);
|
|
LASSERT(policy->sp_cops->flush_ctx_cache);
|
|
|
|
return policy->sp_cops->flush_ctx_cache(sec, uid, grace, force);
|
|
}
|
|
|
|
static void sec_cop_destroy_sec(struct ptlrpc_sec *sec)
|
|
{
|
|
struct ptlrpc_sec_policy *policy = sec->ps_policy;
|
|
|
|
LASSERT_ATOMIC_ZERO(&sec->ps_refcount);
|
|
LASSERT_ATOMIC_ZERO(&sec->ps_nctx);
|
|
LASSERT(policy->sp_cops->destroy_sec);
|
|
|
|
CDEBUG(D_SEC, "%s@%p: being destroyed\n", sec->ps_policy->sp_name, sec);
|
|
|
|
policy->sp_cops->destroy_sec(sec);
|
|
sptlrpc_policy_put(policy);
|
|
}
|
|
|
|
static void sptlrpc_sec_kill(struct ptlrpc_sec *sec)
|
|
{
|
|
LASSERT_ATOMIC_POS(&sec->ps_refcount);
|
|
|
|
if (sec->ps_policy->sp_cops->kill_sec) {
|
|
sec->ps_policy->sp_cops->kill_sec(sec);
|
|
|
|
sec_cop_flush_ctx_cache(sec, -1, 1, 1);
|
|
}
|
|
}
|
|
|
|
static struct ptlrpc_sec *sptlrpc_sec_get(struct ptlrpc_sec *sec)
|
|
{
|
|
if (sec)
|
|
atomic_inc(&sec->ps_refcount);
|
|
|
|
return sec;
|
|
}
|
|
|
|
void sptlrpc_sec_put(struct ptlrpc_sec *sec)
|
|
{
|
|
if (sec) {
|
|
LASSERT_ATOMIC_POS(&sec->ps_refcount);
|
|
|
|
if (atomic_dec_and_test(&sec->ps_refcount)) {
|
|
sptlrpc_gc_del_sec(sec);
|
|
sec_cop_destroy_sec(sec);
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_sec_put);
|
|
|
|
/*
|
|
* policy module is responsible for taking reference of import
|
|
*/
|
|
static
|
|
struct ptlrpc_sec *sptlrpc_sec_create(struct obd_import *imp,
|
|
struct ptlrpc_svc_ctx *svc_ctx,
|
|
struct sptlrpc_flavor *sf,
|
|
enum lustre_sec_part sp)
|
|
{
|
|
struct ptlrpc_sec_policy *policy;
|
|
struct ptlrpc_sec *sec;
|
|
char str[32];
|
|
|
|
if (svc_ctx) {
|
|
LASSERT(imp->imp_dlm_fake == 1);
|
|
|
|
CDEBUG(D_SEC, "%s %s: reverse sec using flavor %s\n",
|
|
imp->imp_obd->obd_type->typ_name,
|
|
imp->imp_obd->obd_name,
|
|
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;
|
|
} else {
|
|
LASSERT(imp->imp_dlm_fake == 0);
|
|
|
|
CDEBUG(D_SEC, "%s %s: select security flavor %s\n",
|
|
imp->imp_obd->obd_type->typ_name,
|
|
imp->imp_obd->obd_name,
|
|
sptlrpc_flavor2name(sf, str, sizeof(str)));
|
|
|
|
policy = sptlrpc_wireflavor2policy(sf->sf_rpc);
|
|
if (!policy) {
|
|
CERROR("invalid flavor 0x%x\n", sf->sf_rpc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
sec = policy->sp_cops->create_sec(imp, svc_ctx, sf);
|
|
if (sec) {
|
|
atomic_inc(&sec->ps_refcount);
|
|
|
|
sec->ps_part = sp;
|
|
|
|
if (sec->ps_gc_interval && policy->sp_cops->gc_ctx)
|
|
sptlrpc_gc_add_sec(sec);
|
|
} else {
|
|
sptlrpc_policy_put(policy);
|
|
}
|
|
|
|
return sec;
|
|
}
|
|
|
|
struct ptlrpc_sec *sptlrpc_import_sec_ref(struct obd_import *imp)
|
|
{
|
|
struct ptlrpc_sec *sec;
|
|
|
|
spin_lock(&imp->imp_lock);
|
|
sec = sptlrpc_sec_get(imp->imp_sec);
|
|
spin_unlock(&imp->imp_lock);
|
|
|
|
return sec;
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_import_sec_ref);
|
|
|
|
static void sptlrpc_import_sec_install(struct obd_import *imp,
|
|
struct ptlrpc_sec *sec)
|
|
{
|
|
struct ptlrpc_sec *old_sec;
|
|
|
|
LASSERT_ATOMIC_POS(&sec->ps_refcount);
|
|
|
|
spin_lock(&imp->imp_lock);
|
|
old_sec = imp->imp_sec;
|
|
imp->imp_sec = sec;
|
|
spin_unlock(&imp->imp_lock);
|
|
|
|
if (old_sec) {
|
|
sptlrpc_sec_kill(old_sec);
|
|
|
|
/* balance the ref taken by this import */
|
|
sptlrpc_sec_put(old_sec);
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
char str1[32], str2[32];
|
|
|
|
if (sec->ps_flvr.sf_flags != sf->sf_flags)
|
|
CDEBUG(D_SEC, "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);
|
|
flavor_copy(&sec->ps_flvr, sf);
|
|
spin_unlock(&sec->ps_lock);
|
|
}
|
|
|
|
/**
|
|
* 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,
|
|
struct sptlrpc_flavor *flvr)
|
|
{
|
|
struct ptlrpc_connection *conn;
|
|
struct sptlrpc_flavor sf;
|
|
struct ptlrpc_sec *sec, *newsec;
|
|
enum lustre_sec_part sp;
|
|
char str[24];
|
|
int rc = 0;
|
|
|
|
might_sleep();
|
|
|
|
if (!imp)
|
|
return 0;
|
|
|
|
conn = imp->imp_connection;
|
|
|
|
if (!svc_ctx) {
|
|
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 request */
|
|
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) {
|
|
char str2[24];
|
|
|
|
if (flavor_equal(&sf, &sec->ps_flvr))
|
|
goto out;
|
|
|
|
CDEBUG(D_SEC, "import %s->%s: changing flavor %s -> %s\n",
|
|
imp->imp_obd->obd_name,
|
|
obd_uuid2str(&conn->c_remote_uuid),
|
|
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;
|
|
}
|
|
} else if (SPTLRPC_FLVR_BASE(sf.sf_rpc) !=
|
|
SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) {
|
|
CDEBUG(D_SEC, "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_flavor2name(&sf, str, sizeof(str)));
|
|
}
|
|
|
|
mutex_lock(&imp->imp_sec_mutex);
|
|
|
|
newsec = sptlrpc_sec_create(imp, svc_ctx, &sf, sp);
|
|
if (newsec) {
|
|
sptlrpc_import_sec_install(imp, newsec);
|
|
} else {
|
|
CERROR("import %s->%s: failed to create new sec\n",
|
|
imp->imp_obd->obd_name,
|
|
obd_uuid2str(&conn->c_remote_uuid));
|
|
rc = -EPERM;
|
|
}
|
|
|
|
mutex_unlock(&imp->imp_sec_mutex);
|
|
out:
|
|
sptlrpc_sec_put(sec);
|
|
return rc;
|
|
}
|
|
|
|
void sptlrpc_import_sec_put(struct obd_import *imp)
|
|
{
|
|
if (imp->imp_sec) {
|
|
sptlrpc_sec_kill(imp->imp_sec);
|
|
|
|
sptlrpc_sec_put(imp->imp_sec);
|
|
imp->imp_sec = NULL;
|
|
}
|
|
}
|
|
|
|
static void import_flush_ctx_common(struct obd_import *imp,
|
|
uid_t uid, int grace, int force)
|
|
{
|
|
struct ptlrpc_sec *sec;
|
|
|
|
if (!imp)
|
|
return;
|
|
|
|
sec = sptlrpc_import_sec_ref(imp);
|
|
if (!sec)
|
|
return;
|
|
|
|
sec_cop_flush_ctx_cache(sec, uid, grace, force);
|
|
sptlrpc_sec_put(sec);
|
|
}
|
|
|
|
void sptlrpc_import_flush_my_ctx(struct obd_import *imp)
|
|
{
|
|
import_flush_ctx_common(imp, from_kuid(&init_user_ns, current_uid()),
|
|
1, 1);
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_import_flush_my_ctx);
|
|
|
|
void sptlrpc_import_flush_all_ctx(struct obd_import *imp)
|
|
{
|
|
import_flush_ctx_common(imp, -1, 1, 1);
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_import_flush_all_ctx);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx;
|
|
struct ptlrpc_sec_policy *policy;
|
|
int rc;
|
|
|
|
LASSERT(ctx);
|
|
LASSERT(ctx->cc_sec);
|
|
LASSERT(ctx->cc_sec->ps_policy);
|
|
LASSERT(!req->rq_reqmsg);
|
|
LASSERT_ATOMIC_POS(&ctx->cc_refcount);
|
|
|
|
policy = ctx->cc_sec->ps_policy;
|
|
rc = policy->sp_cops->alloc_reqbuf(ctx->cc_sec, req, msgsize);
|
|
if (!rc) {
|
|
LASSERT(req->rq_reqmsg);
|
|
LASSERT(req->rq_reqbuf || req->rq_clrbuf);
|
|
|
|
/* zeroing preallocated buffer */
|
|
if (req->rq_pool)
|
|
memset(req->rq_reqmsg, 0, 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(ctx->cc_sec);
|
|
LASSERT(ctx->cc_sec->ps_policy);
|
|
LASSERT_ATOMIC_POS(&ctx->cc_refcount);
|
|
|
|
if (!req->rq_reqbuf && !req->rq_clrbuf)
|
|
return;
|
|
|
|
policy = ctx->cc_sec->ps_policy;
|
|
policy->sp_cops->free_reqbuf(ctx->cc_sec, req);
|
|
req->rq_reqmsg = NULL;
|
|
}
|
|
|
|
/*
|
|
* NOTE caller must guarantee the buffer size is enough for the enlargement
|
|
*/
|
|
void _sptlrpc_enlarge_msg_inplace(struct lustre_msg *msg,
|
|
int segment, int newsize)
|
|
{
|
|
void *src, *dst;
|
|
int oldsize, oldmsg_size, movesize;
|
|
|
|
LASSERT(segment < msg->lm_bufcount);
|
|
LASSERT(msg->lm_buflens[segment] <= newsize);
|
|
|
|
if (msg->lm_buflens[segment] == newsize)
|
|
return;
|
|
|
|
/* nothing to do if we are enlarging the last segment */
|
|
if (segment == msg->lm_bufcount - 1) {
|
|
msg->lm_buflens[segment] = newsize;
|
|
return;
|
|
}
|
|
|
|
oldsize = msg->lm_buflens[segment];
|
|
|
|
src = lustre_msg_buf(msg, segment + 1, 0);
|
|
msg->lm_buflens[segment] = newsize;
|
|
dst = lustre_msg_buf(msg, segment + 1, 0);
|
|
msg->lm_buflens[segment] = oldsize;
|
|
|
|
/* move from segment + 1 to end segment */
|
|
LASSERT(msg->lm_magic == LUSTRE_MSG_MAGIC_V2);
|
|
oldmsg_size = lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
|
|
movesize = oldmsg_size - ((unsigned long) src - (unsigned long) msg);
|
|
LASSERT(movesize >= 0);
|
|
|
|
if (movesize)
|
|
memmove(dst, src, movesize);
|
|
|
|
/* note we don't clear the ares where old data live, not secret */
|
|
|
|
/* finally set new segment size */
|
|
msg->lm_buflens[segment] = newsize;
|
|
}
|
|
EXPORT_SYMBOL(_sptlrpc_enlarge_msg_inplace);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* \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)
|
|
{
|
|
struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx;
|
|
struct ptlrpc_sec_cops *cops;
|
|
struct lustre_msg *msg = req->rq_reqmsg;
|
|
|
|
LASSERT(ctx);
|
|
LASSERT(msg);
|
|
LASSERT(msg->lm_bufcount > segment);
|
|
LASSERT(msg->lm_buflens[segment] <= newsize);
|
|
|
|
if (msg->lm_buflens[segment] == newsize)
|
|
return 0;
|
|
|
|
cops = ctx->cc_sec->ps_policy->sp_cops;
|
|
LASSERT(cops->enlarge_reqbuf);
|
|
return cops->enlarge_reqbuf(ctx->cc_sec, req, segment, newsize);
|
|
}
|
|
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;
|
|
struct ptlrpc_sec_policy *policy;
|
|
|
|
LASSERT(ctx);
|
|
LASSERT(ctx->cc_sec);
|
|
LASSERT(ctx->cc_sec->ps_policy);
|
|
|
|
if (req->rq_repbuf)
|
|
return 0;
|
|
|
|
policy = ctx->cc_sec->ps_policy;
|
|
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;
|
|
struct ptlrpc_sec_policy *policy;
|
|
|
|
LASSERT(ctx);
|
|
LASSERT(ctx->cc_sec);
|
|
LASSERT(ctx->cc_sec->ps_policy);
|
|
LASSERT_ATOMIC_POS(&ctx->cc_refcount);
|
|
|
|
if (!req->rq_repbuf)
|
|
return;
|
|
LASSERT(req->rq_repbuf_len);
|
|
|
|
policy = ctx->cc_sec->ps_policy;
|
|
policy->sp_cops->free_repbuf(ctx->cc_sec, req);
|
|
req->rq_repmsg = NULL;
|
|
}
|
|
|
|
static int sptlrpc_svc_install_rvs_ctx(struct obd_import *imp,
|
|
struct ptlrpc_svc_ctx *ctx)
|
|
{
|
|
struct ptlrpc_sec_policy *policy = ctx->sc_policy;
|
|
|
|
if (!policy->sp_sops->install_rctx)
|
|
return 0;
|
|
return policy->sp_sops->install_rctx(imp, ctx);
|
|
}
|
|
|
|
/****************************************
|
|
* server side security *
|
|
****************************************/
|
|
|
|
static int flavor_allowed(struct sptlrpc_flavor *exp,
|
|
struct ptlrpc_request *req)
|
|
{
|
|
struct sptlrpc_flavor *flvr = &req->rq_flvr;
|
|
|
|
if (exp->sf_rpc == SPTLRPC_FLVR_ANY || exp->sf_rpc == flvr->sf_rpc)
|
|
return 1;
|
|
|
|
if ((req->rq_ctx_init || req->rq_ctx_fini) &&
|
|
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;
|
|
}
|
|
|
|
#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)
|
|
{
|
|
struct sptlrpc_flavor flavor;
|
|
|
|
if (!exp)
|
|
return 0;
|
|
|
|
/* client side export has no imp_reverse, skip
|
|
* FIXME maybe we should check flavor this as well???
|
|
*/
|
|
if (!exp->exp_imp_reverse)
|
|
return 0;
|
|
|
|
/* don't care about ctx fini rpc */
|
|
if (req->rq_ctx_fini)
|
|
return 0;
|
|
|
|
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,
|
|
* adapt reverse sec according to it.
|
|
* note the first rpc with new flavor might not be with root ctx, in
|
|
* which case delay the sec_adapt by leaving exp_flvr_adapt == 1.
|
|
*/
|
|
if (unlikely(exp->exp_flvr_changed) &&
|
|
flavor_allowed(&exp->exp_flvr_old[1], req)) {
|
|
/* make the new flavor as "current", and old ones as
|
|
* about-to-expire
|
|
*/
|
|
CDEBUG(D_SEC, "exp %p: just changed: %x->%x\n", exp,
|
|
exp->exp_flvr.sf_rpc, exp->exp_flvr_old[1].sf_rpc);
|
|
flavor = exp->exp_flvr_old[1];
|
|
exp->exp_flvr_old[1] = exp->exp_flvr_old[0];
|
|
exp->exp_flvr_expire[1] = exp->exp_flvr_expire[0];
|
|
exp->exp_flvr_old[0] = exp->exp_flvr;
|
|
exp->exp_flvr_expire[0] = ktime_get_real_seconds() +
|
|
EXP_FLVR_UPDATE_EXPIRE;
|
|
exp->exp_flvr = flavor;
|
|
|
|
/* flavor change finished */
|
|
exp->exp_flvr_changed = 0;
|
|
LASSERT(exp->exp_flvr_adapt == 1);
|
|
|
|
/* if it's gss, we only interested in root ctx init */
|
|
if (req->rq_auth_gss &&
|
|
!(req->rq_ctx_init &&
|
|
(req->rq_auth_usr_root || req->rq_auth_usr_mdt ||
|
|
req->rq_auth_usr_ost))) {
|
|
spin_unlock(&exp->exp_lock);
|
|
CDEBUG(D_SEC, "is good but not root(%d:%d:%d:%d:%d)\n",
|
|
req->rq_auth_gss, req->rq_ctx_init,
|
|
req->rq_auth_usr_root, req->rq_auth_usr_mdt,
|
|
req->rq_auth_usr_ost);
|
|
return 0;
|
|
}
|
|
|
|
exp->exp_flvr_adapt = 0;
|
|
spin_unlock(&exp->exp_lock);
|
|
|
|
return sptlrpc_import_sec_adapt(exp->exp_imp_reverse,
|
|
req->rq_svc_ctx, &flavor);
|
|
}
|
|
|
|
/* if it equals to the current flavor, we accept it, but need to
|
|
* dealing with reverse sec/ctx
|
|
*/
|
|
if (likely(flavor_allowed(&exp->exp_flvr, req))) {
|
|
/* most cases should return here, we only interested in
|
|
* gss root ctx init
|
|
*/
|
|
if (!req->rq_auth_gss || !req->rq_ctx_init ||
|
|
(!req->rq_auth_usr_root && !req->rq_auth_usr_mdt &&
|
|
!req->rq_auth_usr_ost)) {
|
|
spin_unlock(&exp->exp_lock);
|
|
return 0;
|
|
}
|
|
|
|
/* if flavor just changed, we should not proceed, just leave
|
|
* it and current flavor will be discovered and replaced
|
|
* shortly, and let _this_ rpc pass through
|
|
*/
|
|
if (exp->exp_flvr_changed) {
|
|
LASSERT(exp->exp_flvr_adapt);
|
|
spin_unlock(&exp->exp_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (exp->exp_flvr_adapt) {
|
|
exp->exp_flvr_adapt = 0;
|
|
CDEBUG(D_SEC, "exp %p (%x|%x|%x): do delayed adapt\n",
|
|
exp, exp->exp_flvr.sf_rpc,
|
|
exp->exp_flvr_old[0].sf_rpc,
|
|
exp->exp_flvr_old[1].sf_rpc);
|
|
flavor = exp->exp_flvr;
|
|
spin_unlock(&exp->exp_lock);
|
|
|
|
return sptlrpc_import_sec_adapt(exp->exp_imp_reverse,
|
|
req->rq_svc_ctx,
|
|
&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);
|
|
|
|
return sptlrpc_svc_install_rvs_ctx(exp->exp_imp_reverse,
|
|
req->rq_svc_ctx);
|
|
}
|
|
}
|
|
|
|
if (exp->exp_flvr_expire[0]) {
|
|
if (exp->exp_flvr_expire[0] >= ktime_get_real_seconds()) {
|
|
if (flavor_allowed(&exp->exp_flvr_old[0], req)) {
|
|
CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the middle one (%lld)\n", exp,
|
|
exp->exp_flvr.sf_rpc,
|
|
exp->exp_flvr_old[0].sf_rpc,
|
|
exp->exp_flvr_old[1].sf_rpc,
|
|
(s64)(exp->exp_flvr_expire[0] -
|
|
ktime_get_real_seconds()));
|
|
spin_unlock(&exp->exp_lock);
|
|
return 0;
|
|
}
|
|
} else {
|
|
CDEBUG(D_SEC, "mark middle expired\n");
|
|
exp->exp_flvr_expire[0] = 0;
|
|
}
|
|
CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match middle\n", exp,
|
|
exp->exp_flvr.sf_rpc,
|
|
exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc,
|
|
req->rq_flvr.sf_rpc);
|
|
}
|
|
|
|
/* now it doesn't match the current flavor, the only chance we can
|
|
* accept it is match the old flavors which is not expired.
|
|
*/
|
|
if (exp->exp_flvr_changed == 0 && exp->exp_flvr_expire[1]) {
|
|
if (exp->exp_flvr_expire[1] >= ktime_get_real_seconds()) {
|
|
if (flavor_allowed(&exp->exp_flvr_old[1], req)) {
|
|
CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the oldest one (%lld)\n",
|
|
exp,
|
|
exp->exp_flvr.sf_rpc,
|
|
exp->exp_flvr_old[0].sf_rpc,
|
|
exp->exp_flvr_old[1].sf_rpc,
|
|
(s64)(exp->exp_flvr_expire[1] -
|
|
ktime_get_real_seconds()));
|
|
spin_unlock(&exp->exp_lock);
|
|
return 0;
|
|
}
|
|
} else {
|
|
CDEBUG(D_SEC, "mark oldest expired\n");
|
|
exp->exp_flvr_expire[1] = 0;
|
|
}
|
|
CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match found\n",
|
|
exp, exp->exp_flvr.sf_rpc,
|
|
exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc,
|
|
req->rq_flvr.sf_rpc);
|
|
} else {
|
|
CDEBUG(D_SEC, "exp %p (%x|%x|%x): skip the last one\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);
|
|
|
|
CWARN("exp %p(%s): req %p (%u|%u|%u|%u|%u|%u) with unauthorized flavor %x, expect %x|%x(%+lld)|%x(%+lld)\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_auth_usr_ost,
|
|
req->rq_flvr.sf_rpc,
|
|
exp->exp_flvr.sf_rpc,
|
|
exp->exp_flvr_old[0].sf_rpc,
|
|
exp->exp_flvr_expire[0] ?
|
|
(s64)(exp->exp_flvr_expire[0] - ktime_get_real_seconds()) : 0,
|
|
exp->exp_flvr_old[1].sf_rpc,
|
|
exp->exp_flvr_expire[1] ?
|
|
(s64)(exp->exp_flvr_expire[1] - ktime_get_real_seconds()) : 0);
|
|
return -EACCES;
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_target_export_check);
|
|
|
|
static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc)
|
|
{
|
|
/* peer's claim is unreliable unless gss is being used */
|
|
if (!req->rq_auth_gss || svc_rc == SECSVC_DROP)
|
|
return svc_rc;
|
|
|
|
switch (req->rq_sp_from) {
|
|
case LUSTRE_SP_CLI:
|
|
if (req->rq_auth_usr_mdt || req->rq_auth_usr_ost) {
|
|
DEBUG_REQ(D_ERROR, req, "faked source CLI");
|
|
svc_rc = SECSVC_DROP;
|
|
}
|
|
break;
|
|
case LUSTRE_SP_MDT:
|
|
if (!req->rq_auth_usr_mdt) {
|
|
DEBUG_REQ(D_ERROR, req, "faked source MDT");
|
|
svc_rc = SECSVC_DROP;
|
|
}
|
|
break;
|
|
case LUSTRE_SP_OST:
|
|
if (!req->rq_auth_usr_ost) {
|
|
DEBUG_REQ(D_ERROR, req, "faked source OST");
|
|
svc_rc = SECSVC_DROP;
|
|
}
|
|
break;
|
|
case LUSTRE_SP_MGS:
|
|
case LUSTRE_SP_MGC:
|
|
if (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt &&
|
|
!req->rq_auth_usr_ost) {
|
|
DEBUG_REQ(D_ERROR, req, "faked source MGC/MGS");
|
|
svc_rc = SECSVC_DROP;
|
|
}
|
|
break;
|
|
case LUSTRE_SP_ANY:
|
|
default:
|
|
DEBUG_REQ(D_ERROR, req, "invalid source %u", req->rq_sp_from);
|
|
svc_rc = SECSVC_DROP;
|
|
}
|
|
|
|
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;
|
|
|
|
LASSERT(msg);
|
|
LASSERT(!req->rq_reqmsg);
|
|
LASSERT(!req->rq_repmsg);
|
|
LASSERT(!req->rq_svc_ctx);
|
|
|
|
req->rq_req_swab_mask = 0;
|
|
|
|
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%llu\n",
|
|
libcfs_id2str(req->rq_peer), req->rq_xid);
|
|
return SECSVC_DROP;
|
|
}
|
|
|
|
req->rq_flvr.sf_rpc = WIRE_FLVR(msg->lm_secflvr);
|
|
req->rq_sp_from = LUSTRE_SP_ANY;
|
|
req->rq_auth_uid = -1;
|
|
req->rq_auth_mapped_uid = -1;
|
|
|
|
policy = sptlrpc_wireflavor2policy(req->rq_flvr.sf_rpc);
|
|
if (!policy) {
|
|
CERROR("unsupported rpc flavor %x\n", req->rq_flvr.sf_rpc);
|
|
return SECSVC_DROP;
|
|
}
|
|
|
|
LASSERT(policy->sp_sops->accept);
|
|
rc = policy->sp_sops->accept(req);
|
|
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 coming 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);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
int rc;
|
|
|
|
LASSERT(req->rq_svc_ctx);
|
|
LASSERT(req->rq_svc_ctx->sc_policy);
|
|
|
|
policy = req->rq_svc_ctx->sc_policy;
|
|
LASSERT(policy->sp_sops->alloc_rs);
|
|
|
|
rc = policy->sp_sops->alloc_rs(req, msglen);
|
|
if (unlikely(rc == -ENOMEM)) {
|
|
struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
|
|
|
|
if (svcpt->scp_service->srv_max_reply_size <
|
|
msglen + sizeof(struct ptlrpc_reply_state)) {
|
|
/* Just return failure if the size is too big */
|
|
CERROR("size of message is too big (%zd), %d allowed\n",
|
|
msglen + sizeof(struct ptlrpc_reply_state),
|
|
svcpt->scp_service->srv_max_reply_size);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* failed alloc, try emergency pool */
|
|
rs = lustre_get_emerg_rs(svcpt);
|
|
if (!rs)
|
|
return -ENOMEM;
|
|
|
|
req->rq_reply_state = rs;
|
|
rc = policy->sp_sops->alloc_rs(req, msglen);
|
|
if (rc) {
|
|
lustre_put_emerg_rs(rs);
|
|
req->rq_reply_state = NULL;
|
|
}
|
|
}
|
|
|
|
LASSERT(rc != 0 ||
|
|
(req->rq_reply_state && req->rq_reply_state->rs_msg));
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Used by ptlrpc server, to perform transformation upon reply message.
|
|
*
|
|
* \post req->rq_reply_off is set to appropriate 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;
|
|
int rc;
|
|
|
|
LASSERT(req->rq_svc_ctx);
|
|
LASSERT(req->rq_svc_ctx->sc_policy);
|
|
|
|
policy = req->rq_svc_ctx->sc_policy;
|
|
LASSERT(policy->sp_sops->authorize);
|
|
|
|
rc = policy->sp_sops->authorize(req);
|
|
LASSERT(rc || req->rq_reply_state->rs_repdata_len);
|
|
|
|
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;
|
|
unsigned int prealloc;
|
|
|
|
LASSERT(rs->rs_svc_ctx);
|
|
LASSERT(rs->rs_svc_ctx->sc_policy);
|
|
|
|
policy = rs->rs_svc_ctx->sc_policy;
|
|
LASSERT(policy->sp_sops->free_rs);
|
|
|
|
prealloc = rs->rs_prealloc;
|
|
policy->sp_sops->free_rs(rs);
|
|
|
|
if (prealloc)
|
|
lustre_put_emerg_rs(rs);
|
|
}
|
|
|
|
void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req)
|
|
{
|
|
struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
|
|
|
|
if (ctx)
|
|
atomic_inc(&ctx->sc_refcount);
|
|
}
|
|
|
|
void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req)
|
|
{
|
|
struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
|
|
|
|
if (!ctx)
|
|
return;
|
|
|
|
LASSERT_ATOMIC_POS(&ctx->sc_refcount);
|
|
if (atomic_dec_and_test(&ctx->sc_refcount)) {
|
|
if (ctx->sc_policy->sp_sops->free_ctx)
|
|
ctx->sc_policy->sp_sops->free_ctx(ctx);
|
|
}
|
|
req->rq_svc_ctx = NULL;
|
|
}
|
|
|
|
/****************************************
|
|
* 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;
|
|
|
|
ctx = req->rq_cli_ctx;
|
|
if (ctx->cc_ops->wrap_bulk)
|
|
return ctx->cc_ops->wrap_bulk(ctx, req, desc);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_cli_wrap_bulk);
|
|
|
|
/**
|
|
* 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,
|
|
struct ptlrpc_bulk_desc *desc,
|
|
int nob)
|
|
{
|
|
struct ptlrpc_cli_ctx *ctx;
|
|
int rc;
|
|
|
|
LASSERT(req->rq_bulk_read && !req->rq_bulk_write);
|
|
|
|
if (!req->rq_pack_bulk)
|
|
return desc->bd_nob_transferred;
|
|
|
|
ctx = req->rq_cli_ctx;
|
|
if (ctx->cc_ops->unwrap_bulk) {
|
|
rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc);
|
|
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;
|
|
int rc;
|
|
|
|
LASSERT(!req->rq_bulk_read && req->rq_bulk_write);
|
|
|
|
if (!req->rq_pack_bulk)
|
|
return 0;
|
|
|
|
ctx = req->rq_cli_ctx;
|
|
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\n",
|
|
desc->bd_nob, desc->bd_nob_transferred);
|
|
return -EPROTO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_write);
|
|
|
|
/****************************************
|
|
* user descriptor helpers *
|
|
****************************************/
|
|
|
|
int sptlrpc_current_user_desc_size(void)
|
|
{
|
|
int ngroups;
|
|
|
|
ngroups = current_ngroups;
|
|
|
|
if (ngroups > LUSTRE_MAX_GROUPS)
|
|
ngroups = LUSTRE_MAX_GROUPS;
|
|
return sptlrpc_user_desc_size(ngroups);
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_current_user_desc_size);
|
|
|
|
int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset)
|
|
{
|
|
struct ptlrpc_user_desc *pud;
|
|
|
|
pud = lustre_msg_buf(msg, offset, 0);
|
|
|
|
pud->pud_uid = from_kuid(&init_user_ns, current_uid());
|
|
pud->pud_gid = from_kgid(&init_user_ns, current_gid());
|
|
pud->pud_fsuid = from_kuid(&init_user_ns, current_fsuid());
|
|
pud->pud_fsgid = from_kgid(&init_user_ns, current_fsgid());
|
|
pud->pud_cap = cfs_curproc_cap_pack();
|
|
pud->pud_ngroups = (msg->lm_buflens[offset] - sizeof(*pud)) / 4;
|
|
|
|
task_lock(current);
|
|
if (pud->pud_ngroups > current_ngroups)
|
|
pud->pud_ngroups = current_ngroups;
|
|
memcpy(pud->pud_groups, current_cred()->group_info->blocks[0],
|
|
pud->pud_ngroups * sizeof(__u32));
|
|
task_unlock(current);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_pack_user_desc);
|
|
|
|
int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset, int swabbed)
|
|
{
|
|
struct ptlrpc_user_desc *pud;
|
|
int i;
|
|
|
|
pud = lustre_msg_buf(msg, offset, sizeof(*pud));
|
|
if (!pud)
|
|
return -EINVAL;
|
|
|
|
if (swabbed) {
|
|
__swab32s(&pud->pud_uid);
|
|
__swab32s(&pud->pud_gid);
|
|
__swab32s(&pud->pud_fsuid);
|
|
__swab32s(&pud->pud_fsgid);
|
|
__swab32s(&pud->pud_cap);
|
|
__swab32s(&pud->pud_ngroups);
|
|
}
|
|
|
|
if (pud->pud_ngroups > LUSTRE_MAX_GROUPS) {
|
|
CERROR("%u groups is too large\n", pud->pud_ngroups);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (sizeof(*pud) + pud->pud_ngroups * sizeof(__u32) >
|
|
msg->lm_buflens[offset]) {
|
|
CERROR("%u groups are claimed but bufsize only %u\n",
|
|
pud->pud_ngroups, msg->lm_buflens[offset]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (swabbed) {
|
|
for (i = 0; i < pud->pud_ngroups; i++)
|
|
__swab32s(&pud->pud_groups[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_unpack_user_desc);
|
|
|
|
/****************************************
|
|
* misc helpers *
|
|
****************************************/
|
|
|
|
const char *sec2target_str(struct ptlrpc_sec *sec)
|
|
{
|
|
if (!sec || !sec->ps_import || !sec->ps_import->imp_obd)
|
|
return "*";
|
|
if (sec_is_reverse(sec))
|
|
return "c";
|
|
return obd_uuid2str(&sec->ps_import->imp_obd->u.cli.cl_target_uuid);
|
|
}
|
|
EXPORT_SYMBOL(sec2target_str);
|
|
|
|
/*
|
|
* return true if the bulk data is protected
|
|
*/
|
|
bool 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 true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(sptlrpc_flavor_has_bulk);
|
|
|
|
/****************************************
|
|
* crypto API helper/alloc blkciper *
|
|
****************************************/
|
|
|
|
/****************************************
|
|
* initialize/finalize *
|
|
****************************************/
|
|
|
|
int sptlrpc_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rwlock_init(&policy_lock);
|
|
|
|
rc = sptlrpc_gc_init();
|
|
if (rc)
|
|
goto out;
|
|
|
|
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;
|
|
|
|
rc = sptlrpc_plain_init();
|
|
if (rc)
|
|
goto out_null;
|
|
|
|
rc = sptlrpc_lproc_init();
|
|
if (rc)
|
|
goto out_plain;
|
|
|
|
return 0;
|
|
|
|
out_plain:
|
|
sptlrpc_plain_fini();
|
|
out_null:
|
|
sptlrpc_null_fini();
|
|
out_pool:
|
|
sptlrpc_enc_pool_fini();
|
|
out_conf:
|
|
sptlrpc_conf_fini();
|
|
out_gc:
|
|
sptlrpc_gc_fini();
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
void sptlrpc_fini(void)
|
|
{
|
|
sptlrpc_lproc_fini();
|
|
sptlrpc_plain_fini();
|
|
sptlrpc_null_fini();
|
|
sptlrpc_enc_pool_fini();
|
|
sptlrpc_conf_fini();
|
|
sptlrpc_gc_fini();
|
|
}
|