mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Pull sched.h split-up from Ingo Molnar: "The point of these changes is to significantly reduce the <linux/sched.h> header footprint, to speed up the kernel build and to have a cleaner header structure. After these changes the new <linux/sched.h>'s typical preprocessed size goes down from a previous ~0.68 MB (~22K lines) to ~0.45 MB (~15K lines), which is around 40% faster to build on typical configs. Not much changed from the last version (-v2) posted three weeks ago: I eliminated quirks, backmerged fixes plus I rebased it to an upstream SHA1 from yesterday that includes most changes queued up in -next plus all sched.h changes that were pending from Andrew. I've re-tested the series both on x86 and on cross-arch defconfigs, and did a bisectability test at a number of random points. I tried to test as many build configurations as possible, but some build breakage is probably still left - but it should be mostly limited to architectures that have no cross-compiler binaries available on kernel.org, and non-default configurations" * 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (146 commits) sched/headers: Clean up <linux/sched.h> sched/headers: Remove #ifdefs from <linux/sched.h> sched/headers: Remove the <linux/topology.h> include from <linux/sched.h> sched/headers, hrtimer: Remove the <linux/wait.h> include from <linux/hrtimer.h> sched/headers, x86/apic: Remove the <linux/pm.h> header inclusion from <asm/apic.h> sched/headers, timers: Remove the <linux/sysctl.h> include from <linux/timer.h> sched/headers: Remove <linux/magic.h> from <linux/sched/task_stack.h> sched/headers: Remove <linux/sched.h> from <linux/sched/init.h> sched/core: Remove unused prefetch_stack() sched/headers: Remove <linux/rculist.h> from <linux/sched.h> sched/headers: Remove the 'init_pid_ns' prototype from <linux/sched.h> sched/headers: Remove <linux/signal.h> from <linux/sched.h> sched/headers: Remove <linux/rwsem.h> from <linux/sched.h> sched/headers: Remove the runqueue_is_locked() prototype sched/headers: Remove <linux/sched.h> from <linux/sched/hotplug.h> sched/headers: Remove <linux/sched.h> from <linux/sched/debug.h> sched/headers: Remove <linux/sched.h> from <linux/sched/nohz.h> sched/headers: Remove <linux/sched.h> from <linux/sched/stat.h> sched/headers: Remove the <linux/gfp.h> include from <linux/sched.h> sched/headers: Remove <linux/rtmutex.h> from <linux/sched.h> ...
4711 lines
126 KiB
C
4711 lines
126 KiB
C
/*******************************************************************************
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* This file contains main functions related to the iSCSI Target Core Driver.
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*
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* (c) Copyright 2007-2013 Datera, Inc.
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*
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* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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******************************************************************************/
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#include <crypto/hash.h>
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#include <linux/string.h>
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#include <linux/kthread.h>
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#include <linux/completion.h>
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#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <linux/idr.h>
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#include <linux/delay.h>
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#include <linux/sched/signal.h>
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#include <asm/unaligned.h>
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#include <net/ipv6.h>
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#include <scsi/scsi_proto.h>
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#include <scsi/iscsi_proto.h>
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#include <scsi/scsi_tcq.h>
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#include <target/target_core_base.h>
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#include <target/target_core_fabric.h>
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#include <target/iscsi/iscsi_target_core.h>
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#include "iscsi_target_parameters.h"
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#include "iscsi_target_seq_pdu_list.h"
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#include "iscsi_target_datain_values.h"
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#include "iscsi_target_erl0.h"
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#include "iscsi_target_erl1.h"
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#include "iscsi_target_erl2.h"
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#include "iscsi_target_login.h"
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#include "iscsi_target_tmr.h"
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#include "iscsi_target_tpg.h"
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#include "iscsi_target_util.h"
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#include "iscsi_target.h"
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#include "iscsi_target_device.h"
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#include <target/iscsi/iscsi_target_stat.h>
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#include <target/iscsi/iscsi_transport.h>
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static LIST_HEAD(g_tiqn_list);
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static LIST_HEAD(g_np_list);
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static DEFINE_SPINLOCK(tiqn_lock);
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static DEFINE_MUTEX(np_lock);
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static struct idr tiqn_idr;
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struct idr sess_idr;
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struct mutex auth_id_lock;
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spinlock_t sess_idr_lock;
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struct iscsit_global *iscsit_global;
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struct kmem_cache *lio_qr_cache;
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struct kmem_cache *lio_dr_cache;
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struct kmem_cache *lio_ooo_cache;
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struct kmem_cache *lio_r2t_cache;
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static int iscsit_handle_immediate_data(struct iscsi_cmd *,
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struct iscsi_scsi_req *, u32);
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struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf)
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{
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struct iscsi_tiqn *tiqn = NULL;
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spin_lock(&tiqn_lock);
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list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) {
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if (!strcmp(tiqn->tiqn, buf)) {
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spin_lock(&tiqn->tiqn_state_lock);
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if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) {
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tiqn->tiqn_access_count++;
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spin_unlock(&tiqn->tiqn_state_lock);
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spin_unlock(&tiqn_lock);
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return tiqn;
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}
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spin_unlock(&tiqn->tiqn_state_lock);
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}
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}
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spin_unlock(&tiqn_lock);
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return NULL;
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}
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static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn)
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{
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spin_lock(&tiqn->tiqn_state_lock);
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if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) {
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tiqn->tiqn_state = TIQN_STATE_SHUTDOWN;
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spin_unlock(&tiqn->tiqn_state_lock);
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return 0;
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}
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spin_unlock(&tiqn->tiqn_state_lock);
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return -1;
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}
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void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn)
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{
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spin_lock(&tiqn->tiqn_state_lock);
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tiqn->tiqn_access_count--;
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spin_unlock(&tiqn->tiqn_state_lock);
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}
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/*
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* Note that IQN formatting is expected to be done in userspace, and
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* no explict IQN format checks are done here.
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*/
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struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf)
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{
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struct iscsi_tiqn *tiqn = NULL;
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int ret;
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if (strlen(buf) >= ISCSI_IQN_LEN) {
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pr_err("Target IQN exceeds %d bytes\n",
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ISCSI_IQN_LEN);
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return ERR_PTR(-EINVAL);
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}
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tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL);
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if (!tiqn) {
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pr_err("Unable to allocate struct iscsi_tiqn\n");
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return ERR_PTR(-ENOMEM);
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}
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sprintf(tiqn->tiqn, "%s", buf);
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INIT_LIST_HEAD(&tiqn->tiqn_list);
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INIT_LIST_HEAD(&tiqn->tiqn_tpg_list);
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spin_lock_init(&tiqn->tiqn_state_lock);
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spin_lock_init(&tiqn->tiqn_tpg_lock);
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spin_lock_init(&tiqn->sess_err_stats.lock);
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spin_lock_init(&tiqn->login_stats.lock);
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spin_lock_init(&tiqn->logout_stats.lock);
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tiqn->tiqn_state = TIQN_STATE_ACTIVE;
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idr_preload(GFP_KERNEL);
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spin_lock(&tiqn_lock);
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ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT);
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if (ret < 0) {
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pr_err("idr_alloc() failed for tiqn->tiqn_index\n");
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spin_unlock(&tiqn_lock);
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idr_preload_end();
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kfree(tiqn);
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return ERR_PTR(ret);
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}
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tiqn->tiqn_index = ret;
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list_add_tail(&tiqn->tiqn_list, &g_tiqn_list);
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spin_unlock(&tiqn_lock);
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idr_preload_end();
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pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn);
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return tiqn;
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}
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static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn)
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{
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/*
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* Wait for accesses to said struct iscsi_tiqn to end.
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*/
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spin_lock(&tiqn->tiqn_state_lock);
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while (tiqn->tiqn_access_count != 0) {
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spin_unlock(&tiqn->tiqn_state_lock);
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msleep(10);
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spin_lock(&tiqn->tiqn_state_lock);
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}
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spin_unlock(&tiqn->tiqn_state_lock);
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}
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void iscsit_del_tiqn(struct iscsi_tiqn *tiqn)
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{
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/*
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* iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN
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* while holding tiqn->tiqn_state_lock. This means that all subsequent
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* attempts to access this struct iscsi_tiqn will fail from both transport
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* fabric and control code paths.
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*/
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if (iscsit_set_tiqn_shutdown(tiqn) < 0) {
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pr_err("iscsit_set_tiqn_shutdown() failed\n");
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return;
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}
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iscsit_wait_for_tiqn(tiqn);
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spin_lock(&tiqn_lock);
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list_del(&tiqn->tiqn_list);
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idr_remove(&tiqn_idr, tiqn->tiqn_index);
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spin_unlock(&tiqn_lock);
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pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n",
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tiqn->tiqn);
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kfree(tiqn);
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}
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int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg)
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{
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int ret;
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/*
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* Determine if the network portal is accepting storage traffic.
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*/
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spin_lock_bh(&np->np_thread_lock);
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if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
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spin_unlock_bh(&np->np_thread_lock);
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return -1;
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}
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spin_unlock_bh(&np->np_thread_lock);
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/*
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* Determine if the portal group is accepting storage traffic.
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*/
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spin_lock_bh(&tpg->tpg_state_lock);
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if (tpg->tpg_state != TPG_STATE_ACTIVE) {
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spin_unlock_bh(&tpg->tpg_state_lock);
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return -1;
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}
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spin_unlock_bh(&tpg->tpg_state_lock);
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/*
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* Here we serialize access across the TIQN+TPG Tuple.
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*/
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ret = down_interruptible(&tpg->np_login_sem);
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if (ret != 0)
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return -1;
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spin_lock_bh(&tpg->tpg_state_lock);
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if (tpg->tpg_state != TPG_STATE_ACTIVE) {
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spin_unlock_bh(&tpg->tpg_state_lock);
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up(&tpg->np_login_sem);
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return -1;
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}
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spin_unlock_bh(&tpg->tpg_state_lock);
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return 0;
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}
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void iscsit_login_kref_put(struct kref *kref)
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{
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struct iscsi_tpg_np *tpg_np = container_of(kref,
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struct iscsi_tpg_np, tpg_np_kref);
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complete(&tpg_np->tpg_np_comp);
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}
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int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg,
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struct iscsi_tpg_np *tpg_np)
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{
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struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
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up(&tpg->np_login_sem);
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if (tpg_np)
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kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put);
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if (tiqn)
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iscsit_put_tiqn_for_login(tiqn);
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return 0;
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}
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bool iscsit_check_np_match(
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struct sockaddr_storage *sockaddr,
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struct iscsi_np *np,
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int network_transport)
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{
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struct sockaddr_in *sock_in, *sock_in_e;
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struct sockaddr_in6 *sock_in6, *sock_in6_e;
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bool ip_match = false;
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u16 port, port_e;
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if (sockaddr->ss_family == AF_INET6) {
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sock_in6 = (struct sockaddr_in6 *)sockaddr;
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sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr;
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if (!memcmp(&sock_in6->sin6_addr.in6_u,
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&sock_in6_e->sin6_addr.in6_u,
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sizeof(struct in6_addr)))
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ip_match = true;
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port = ntohs(sock_in6->sin6_port);
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port_e = ntohs(sock_in6_e->sin6_port);
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} else {
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sock_in = (struct sockaddr_in *)sockaddr;
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sock_in_e = (struct sockaddr_in *)&np->np_sockaddr;
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if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr)
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ip_match = true;
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port = ntohs(sock_in->sin_port);
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port_e = ntohs(sock_in_e->sin_port);
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}
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if (ip_match && (port_e == port) &&
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(np->np_network_transport == network_transport))
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return true;
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return false;
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}
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/*
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* Called with mutex np_lock held
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*/
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static struct iscsi_np *iscsit_get_np(
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struct sockaddr_storage *sockaddr,
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int network_transport)
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{
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struct iscsi_np *np;
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bool match;
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list_for_each_entry(np, &g_np_list, np_list) {
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spin_lock_bh(&np->np_thread_lock);
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if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
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spin_unlock_bh(&np->np_thread_lock);
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continue;
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}
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match = iscsit_check_np_match(sockaddr, np, network_transport);
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if (match) {
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/*
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* Increment the np_exports reference count now to
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* prevent iscsit_del_np() below from being called
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* while iscsi_tpg_add_network_portal() is called.
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*/
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np->np_exports++;
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spin_unlock_bh(&np->np_thread_lock);
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return np;
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}
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spin_unlock_bh(&np->np_thread_lock);
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}
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return NULL;
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}
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struct iscsi_np *iscsit_add_np(
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struct sockaddr_storage *sockaddr,
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int network_transport)
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{
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struct iscsi_np *np;
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int ret;
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mutex_lock(&np_lock);
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/*
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* Locate the existing struct iscsi_np if already active..
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*/
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np = iscsit_get_np(sockaddr, network_transport);
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if (np) {
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mutex_unlock(&np_lock);
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return np;
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}
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np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL);
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if (!np) {
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pr_err("Unable to allocate memory for struct iscsi_np\n");
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mutex_unlock(&np_lock);
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return ERR_PTR(-ENOMEM);
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}
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np->np_flags |= NPF_IP_NETWORK;
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np->np_network_transport = network_transport;
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spin_lock_init(&np->np_thread_lock);
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init_completion(&np->np_restart_comp);
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INIT_LIST_HEAD(&np->np_list);
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ret = iscsi_target_setup_login_socket(np, sockaddr);
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if (ret != 0) {
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kfree(np);
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mutex_unlock(&np_lock);
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return ERR_PTR(ret);
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}
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np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np");
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if (IS_ERR(np->np_thread)) {
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pr_err("Unable to create kthread: iscsi_np\n");
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ret = PTR_ERR(np->np_thread);
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kfree(np);
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mutex_unlock(&np_lock);
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return ERR_PTR(ret);
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}
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/*
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* Increment the np_exports reference count now to prevent
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* iscsit_del_np() below from being run while a new call to
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* iscsi_tpg_add_network_portal() for a matching iscsi_np is
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* active. We don't need to hold np->np_thread_lock at this
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* point because iscsi_np has not been added to g_np_list yet.
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*/
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np->np_exports = 1;
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np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
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list_add_tail(&np->np_list, &g_np_list);
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mutex_unlock(&np_lock);
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pr_debug("CORE[0] - Added Network Portal: %pISpc on %s\n",
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&np->np_sockaddr, np->np_transport->name);
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return np;
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}
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int iscsit_reset_np_thread(
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struct iscsi_np *np,
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struct iscsi_tpg_np *tpg_np,
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struct iscsi_portal_group *tpg,
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bool shutdown)
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{
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spin_lock_bh(&np->np_thread_lock);
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if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) {
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spin_unlock_bh(&np->np_thread_lock);
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return 0;
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}
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np->np_thread_state = ISCSI_NP_THREAD_RESET;
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if (np->np_thread) {
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spin_unlock_bh(&np->np_thread_lock);
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send_sig(SIGINT, np->np_thread, 1);
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wait_for_completion(&np->np_restart_comp);
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spin_lock_bh(&np->np_thread_lock);
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}
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spin_unlock_bh(&np->np_thread_lock);
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if (tpg_np && shutdown) {
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kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put);
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wait_for_completion(&tpg_np->tpg_np_comp);
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}
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return 0;
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}
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static void iscsit_free_np(struct iscsi_np *np)
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{
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if (np->np_socket)
|
|
sock_release(np->np_socket);
|
|
}
|
|
|
|
int iscsit_del_np(struct iscsi_np *np)
|
|
{
|
|
spin_lock_bh(&np->np_thread_lock);
|
|
np->np_exports--;
|
|
if (np->np_exports) {
|
|
np->enabled = true;
|
|
spin_unlock_bh(&np->np_thread_lock);
|
|
return 0;
|
|
}
|
|
np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN;
|
|
spin_unlock_bh(&np->np_thread_lock);
|
|
|
|
if (np->np_thread) {
|
|
/*
|
|
* We need to send the signal to wakeup Linux/Net
|
|
* which may be sleeping in sock_accept()..
|
|
*/
|
|
send_sig(SIGINT, np->np_thread, 1);
|
|
kthread_stop(np->np_thread);
|
|
np->np_thread = NULL;
|
|
}
|
|
|
|
np->np_transport->iscsit_free_np(np);
|
|
|
|
mutex_lock(&np_lock);
|
|
list_del(&np->np_list);
|
|
mutex_unlock(&np_lock);
|
|
|
|
pr_debug("CORE[0] - Removed Network Portal: %pISpc on %s\n",
|
|
&np->np_sockaddr, np->np_transport->name);
|
|
|
|
iscsit_put_transport(np->np_transport);
|
|
kfree(np);
|
|
return 0;
|
|
}
|
|
|
|
static void iscsit_get_rx_pdu(struct iscsi_conn *);
|
|
|
|
int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
|
|
{
|
|
iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_queue_rsp);
|
|
|
|
void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
|
|
{
|
|
bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD);
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
if (!list_empty(&cmd->i_conn_node) &&
|
|
!(cmd->se_cmd.transport_state & CMD_T_FABRIC_STOP))
|
|
list_del_init(&cmd->i_conn_node);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
__iscsit_free_cmd(cmd, scsi_cmd, true);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_aborted_task);
|
|
|
|
static void iscsit_do_crypto_hash_buf(struct ahash_request *, const void *,
|
|
u32, u32, u8 *, u8 *);
|
|
static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *);
|
|
|
|
static int
|
|
iscsit_xmit_nondatain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
const void *data_buf, u32 data_buf_len)
|
|
{
|
|
struct iscsi_hdr *hdr = (struct iscsi_hdr *)cmd->pdu;
|
|
struct kvec *iov;
|
|
u32 niov = 0, tx_size = ISCSI_HDR_LEN;
|
|
int ret;
|
|
|
|
iov = &cmd->iov_misc[0];
|
|
iov[niov].iov_base = cmd->pdu;
|
|
iov[niov++].iov_len = ISCSI_HDR_LEN;
|
|
|
|
if (conn->conn_ops->HeaderDigest) {
|
|
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
|
|
|
|
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
|
|
ISCSI_HDR_LEN, 0, NULL,
|
|
(u8 *)header_digest);
|
|
|
|
iov[0].iov_len += ISCSI_CRC_LEN;
|
|
tx_size += ISCSI_CRC_LEN;
|
|
pr_debug("Attaching CRC32C HeaderDigest"
|
|
" to opcode 0x%x 0x%08x\n",
|
|
hdr->opcode, *header_digest);
|
|
}
|
|
|
|
if (data_buf_len) {
|
|
u32 padding = ((-data_buf_len) & 3);
|
|
|
|
iov[niov].iov_base = (void *)data_buf;
|
|
iov[niov++].iov_len = data_buf_len;
|
|
tx_size += data_buf_len;
|
|
|
|
if (padding != 0) {
|
|
iov[niov].iov_base = &cmd->pad_bytes;
|
|
iov[niov++].iov_len = padding;
|
|
tx_size += padding;
|
|
pr_debug("Attaching %u additional"
|
|
" padding bytes.\n", padding);
|
|
}
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
|
|
data_buf, data_buf_len,
|
|
padding,
|
|
(u8 *)&cmd->pad_bytes,
|
|
(u8 *)&cmd->data_crc);
|
|
|
|
iov[niov].iov_base = &cmd->data_crc;
|
|
iov[niov++].iov_len = ISCSI_CRC_LEN;
|
|
tx_size += ISCSI_CRC_LEN;
|
|
pr_debug("Attached DataDigest for %u"
|
|
" bytes opcode 0x%x, CRC 0x%08x\n",
|
|
data_buf_len, hdr->opcode, cmd->data_crc);
|
|
}
|
|
}
|
|
|
|
cmd->iov_misc_count = niov;
|
|
cmd->tx_size = tx_size;
|
|
|
|
ret = iscsit_send_tx_data(cmd, conn, 1);
|
|
if (ret < 0) {
|
|
iscsit_tx_thread_wait_for_tcp(conn);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iscsit_map_iovec(struct iscsi_cmd *, struct kvec *, u32, u32);
|
|
static void iscsit_unmap_iovec(struct iscsi_cmd *);
|
|
static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsi_cmd *,
|
|
u32, u32, u32, u8 *);
|
|
static int
|
|
iscsit_xmit_datain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
const struct iscsi_datain *datain)
|
|
{
|
|
struct kvec *iov;
|
|
u32 iov_count = 0, tx_size = 0;
|
|
int ret, iov_ret;
|
|
|
|
iov = &cmd->iov_data[0];
|
|
iov[iov_count].iov_base = cmd->pdu;
|
|
iov[iov_count++].iov_len = ISCSI_HDR_LEN;
|
|
tx_size += ISCSI_HDR_LEN;
|
|
|
|
if (conn->conn_ops->HeaderDigest) {
|
|
u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
|
|
|
|
iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
|
|
ISCSI_HDR_LEN, 0, NULL,
|
|
(u8 *)header_digest);
|
|
|
|
iov[0].iov_len += ISCSI_CRC_LEN;
|
|
tx_size += ISCSI_CRC_LEN;
|
|
|
|
pr_debug("Attaching CRC32 HeaderDigest for DataIN PDU 0x%08x\n",
|
|
*header_digest);
|
|
}
|
|
|
|
iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1],
|
|
datain->offset, datain->length);
|
|
if (iov_ret < 0)
|
|
return -1;
|
|
|
|
iov_count += iov_ret;
|
|
tx_size += datain->length;
|
|
|
|
cmd->padding = ((-datain->length) & 3);
|
|
if (cmd->padding) {
|
|
iov[iov_count].iov_base = cmd->pad_bytes;
|
|
iov[iov_count++].iov_len = cmd->padding;
|
|
tx_size += cmd->padding;
|
|
|
|
pr_debug("Attaching %u padding bytes\n", cmd->padding);
|
|
}
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash,
|
|
cmd, datain->offset,
|
|
datain->length,
|
|
cmd->padding,
|
|
cmd->pad_bytes);
|
|
|
|
iov[iov_count].iov_base = &cmd->data_crc;
|
|
iov[iov_count++].iov_len = ISCSI_CRC_LEN;
|
|
tx_size += ISCSI_CRC_LEN;
|
|
|
|
pr_debug("Attached CRC32C DataDigest %d bytes, crc 0x%08x\n",
|
|
datain->length + cmd->padding, cmd->data_crc);
|
|
}
|
|
|
|
cmd->iov_data_count = iov_count;
|
|
cmd->tx_size = tx_size;
|
|
|
|
ret = iscsit_fe_sendpage_sg(cmd, conn);
|
|
|
|
iscsit_unmap_iovec(cmd);
|
|
|
|
if (ret < 0) {
|
|
iscsit_tx_thread_wait_for_tcp(conn);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iscsit_xmit_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_datain_req *dr, const void *buf,
|
|
u32 buf_len)
|
|
{
|
|
if (dr)
|
|
return iscsit_xmit_datain_pdu(conn, cmd, buf);
|
|
else
|
|
return iscsit_xmit_nondatain_pdu(conn, cmd, buf, buf_len);
|
|
}
|
|
|
|
static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn)
|
|
{
|
|
return TARGET_PROT_NORMAL;
|
|
}
|
|
|
|
static struct iscsit_transport iscsi_target_transport = {
|
|
.name = "iSCSI/TCP",
|
|
.transport_type = ISCSI_TCP,
|
|
.rdma_shutdown = false,
|
|
.owner = NULL,
|
|
.iscsit_setup_np = iscsit_setup_np,
|
|
.iscsit_accept_np = iscsit_accept_np,
|
|
.iscsit_free_np = iscsit_free_np,
|
|
.iscsit_get_login_rx = iscsit_get_login_rx,
|
|
.iscsit_put_login_tx = iscsit_put_login_tx,
|
|
.iscsit_get_dataout = iscsit_build_r2ts_for_cmd,
|
|
.iscsit_immediate_queue = iscsit_immediate_queue,
|
|
.iscsit_response_queue = iscsit_response_queue,
|
|
.iscsit_queue_data_in = iscsit_queue_rsp,
|
|
.iscsit_queue_status = iscsit_queue_rsp,
|
|
.iscsit_aborted_task = iscsit_aborted_task,
|
|
.iscsit_xmit_pdu = iscsit_xmit_pdu,
|
|
.iscsit_get_rx_pdu = iscsit_get_rx_pdu,
|
|
.iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops,
|
|
};
|
|
|
|
static int __init iscsi_target_init_module(void)
|
|
{
|
|
int ret = 0, size;
|
|
|
|
pr_debug("iSCSI-Target "ISCSIT_VERSION"\n");
|
|
|
|
iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL);
|
|
if (!iscsit_global) {
|
|
pr_err("Unable to allocate memory for iscsit_global\n");
|
|
return -1;
|
|
}
|
|
spin_lock_init(&iscsit_global->ts_bitmap_lock);
|
|
mutex_init(&auth_id_lock);
|
|
spin_lock_init(&sess_idr_lock);
|
|
idr_init(&tiqn_idr);
|
|
idr_init(&sess_idr);
|
|
|
|
ret = target_register_template(&iscsi_ops);
|
|
if (ret)
|
|
goto out;
|
|
|
|
size = BITS_TO_LONGS(ISCSIT_BITMAP_BITS) * sizeof(long);
|
|
iscsit_global->ts_bitmap = vzalloc(size);
|
|
if (!iscsit_global->ts_bitmap) {
|
|
pr_err("Unable to allocate iscsit_global->ts_bitmap\n");
|
|
goto configfs_out;
|
|
}
|
|
|
|
lio_qr_cache = kmem_cache_create("lio_qr_cache",
|
|
sizeof(struct iscsi_queue_req),
|
|
__alignof__(struct iscsi_queue_req), 0, NULL);
|
|
if (!lio_qr_cache) {
|
|
pr_err("nable to kmem_cache_create() for"
|
|
" lio_qr_cache\n");
|
|
goto bitmap_out;
|
|
}
|
|
|
|
lio_dr_cache = kmem_cache_create("lio_dr_cache",
|
|
sizeof(struct iscsi_datain_req),
|
|
__alignof__(struct iscsi_datain_req), 0, NULL);
|
|
if (!lio_dr_cache) {
|
|
pr_err("Unable to kmem_cache_create() for"
|
|
" lio_dr_cache\n");
|
|
goto qr_out;
|
|
}
|
|
|
|
lio_ooo_cache = kmem_cache_create("lio_ooo_cache",
|
|
sizeof(struct iscsi_ooo_cmdsn),
|
|
__alignof__(struct iscsi_ooo_cmdsn), 0, NULL);
|
|
if (!lio_ooo_cache) {
|
|
pr_err("Unable to kmem_cache_create() for"
|
|
" lio_ooo_cache\n");
|
|
goto dr_out;
|
|
}
|
|
|
|
lio_r2t_cache = kmem_cache_create("lio_r2t_cache",
|
|
sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t),
|
|
0, NULL);
|
|
if (!lio_r2t_cache) {
|
|
pr_err("Unable to kmem_cache_create() for"
|
|
" lio_r2t_cache\n");
|
|
goto ooo_out;
|
|
}
|
|
|
|
iscsit_register_transport(&iscsi_target_transport);
|
|
|
|
if (iscsit_load_discovery_tpg() < 0)
|
|
goto r2t_out;
|
|
|
|
return ret;
|
|
r2t_out:
|
|
iscsit_unregister_transport(&iscsi_target_transport);
|
|
kmem_cache_destroy(lio_r2t_cache);
|
|
ooo_out:
|
|
kmem_cache_destroy(lio_ooo_cache);
|
|
dr_out:
|
|
kmem_cache_destroy(lio_dr_cache);
|
|
qr_out:
|
|
kmem_cache_destroy(lio_qr_cache);
|
|
bitmap_out:
|
|
vfree(iscsit_global->ts_bitmap);
|
|
configfs_out:
|
|
/* XXX: this probably wants it to be it's own unwind step.. */
|
|
if (iscsit_global->discovery_tpg)
|
|
iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1);
|
|
target_unregister_template(&iscsi_ops);
|
|
out:
|
|
kfree(iscsit_global);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void __exit iscsi_target_cleanup_module(void)
|
|
{
|
|
iscsit_release_discovery_tpg();
|
|
iscsit_unregister_transport(&iscsi_target_transport);
|
|
kmem_cache_destroy(lio_qr_cache);
|
|
kmem_cache_destroy(lio_dr_cache);
|
|
kmem_cache_destroy(lio_ooo_cache);
|
|
kmem_cache_destroy(lio_r2t_cache);
|
|
|
|
/*
|
|
* Shutdown discovery sessions and disable discovery TPG
|
|
*/
|
|
if (iscsit_global->discovery_tpg)
|
|
iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1);
|
|
|
|
target_unregister_template(&iscsi_ops);
|
|
|
|
vfree(iscsit_global->ts_bitmap);
|
|
kfree(iscsit_global);
|
|
}
|
|
|
|
int iscsit_add_reject(
|
|
struct iscsi_conn *conn,
|
|
u8 reason,
|
|
unsigned char *buf)
|
|
{
|
|
struct iscsi_cmd *cmd;
|
|
|
|
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
|
|
if (!cmd)
|
|
return -1;
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_REJECT;
|
|
cmd->reject_reason = reason;
|
|
|
|
cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL);
|
|
if (!cmd->buf_ptr) {
|
|
pr_err("Unable to allocate memory for cmd->buf_ptr\n");
|
|
iscsit_free_cmd(cmd, false);
|
|
return -1;
|
|
}
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
cmd->i_state = ISTATE_SEND_REJECT;
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
|
|
return -1;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_add_reject);
|
|
|
|
static int iscsit_add_reject_from_cmd(
|
|
struct iscsi_cmd *cmd,
|
|
u8 reason,
|
|
bool add_to_conn,
|
|
unsigned char *buf)
|
|
{
|
|
struct iscsi_conn *conn;
|
|
|
|
if (!cmd->conn) {
|
|
pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
|
|
cmd->init_task_tag);
|
|
return -1;
|
|
}
|
|
conn = cmd->conn;
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_REJECT;
|
|
cmd->reject_reason = reason;
|
|
|
|
cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL);
|
|
if (!cmd->buf_ptr) {
|
|
pr_err("Unable to allocate memory for cmd->buf_ptr\n");
|
|
iscsit_free_cmd(cmd, false);
|
|
return -1;
|
|
}
|
|
|
|
if (add_to_conn) {
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
}
|
|
|
|
cmd->i_state = ISTATE_SEND_REJECT;
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
/*
|
|
* Perform the kref_put now if se_cmd has already been setup by
|
|
* scsit_setup_scsi_cmd()
|
|
*/
|
|
if (cmd->se_cmd.se_tfo != NULL) {
|
|
pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n");
|
|
target_put_sess_cmd(&cmd->se_cmd);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason,
|
|
unsigned char *buf)
|
|
{
|
|
return iscsit_add_reject_from_cmd(cmd, reason, true, buf);
|
|
}
|
|
|
|
int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf)
|
|
{
|
|
return iscsit_add_reject_from_cmd(cmd, reason, false, buf);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_reject_cmd);
|
|
|
|
/*
|
|
* Map some portion of the allocated scatterlist to an iovec, suitable for
|
|
* kernel sockets to copy data in/out.
|
|
*/
|
|
static int iscsit_map_iovec(
|
|
struct iscsi_cmd *cmd,
|
|
struct kvec *iov,
|
|
u32 data_offset,
|
|
u32 data_length)
|
|
{
|
|
u32 i = 0;
|
|
struct scatterlist *sg;
|
|
unsigned int page_off;
|
|
|
|
/*
|
|
* We know each entry in t_data_sg contains a page.
|
|
*/
|
|
u32 ent = data_offset / PAGE_SIZE;
|
|
|
|
if (ent >= cmd->se_cmd.t_data_nents) {
|
|
pr_err("Initial page entry out-of-bounds\n");
|
|
return -1;
|
|
}
|
|
|
|
sg = &cmd->se_cmd.t_data_sg[ent];
|
|
page_off = (data_offset % PAGE_SIZE);
|
|
|
|
cmd->first_data_sg = sg;
|
|
cmd->first_data_sg_off = page_off;
|
|
|
|
while (data_length) {
|
|
u32 cur_len = min_t(u32, data_length, sg->length - page_off);
|
|
|
|
iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off;
|
|
iov[i].iov_len = cur_len;
|
|
|
|
data_length -= cur_len;
|
|
page_off = 0;
|
|
sg = sg_next(sg);
|
|
i++;
|
|
}
|
|
|
|
cmd->kmapped_nents = i;
|
|
|
|
return i;
|
|
}
|
|
|
|
static void iscsit_unmap_iovec(struct iscsi_cmd *cmd)
|
|
{
|
|
u32 i;
|
|
struct scatterlist *sg;
|
|
|
|
sg = cmd->first_data_sg;
|
|
|
|
for (i = 0; i < cmd->kmapped_nents; i++)
|
|
kunmap(sg_page(&sg[i]));
|
|
}
|
|
|
|
static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn)
|
|
{
|
|
LIST_HEAD(ack_list);
|
|
struct iscsi_cmd *cmd, *cmd_p;
|
|
|
|
conn->exp_statsn = exp_statsn;
|
|
|
|
if (conn->sess->sess_ops->RDMAExtensions)
|
|
return;
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) {
|
|
spin_lock(&cmd->istate_lock);
|
|
if ((cmd->i_state == ISTATE_SENT_STATUS) &&
|
|
iscsi_sna_lt(cmd->stat_sn, exp_statsn)) {
|
|
cmd->i_state = ISTATE_REMOVE;
|
|
spin_unlock(&cmd->istate_lock);
|
|
list_move_tail(&cmd->i_conn_node, &ack_list);
|
|
continue;
|
|
}
|
|
spin_unlock(&cmd->istate_lock);
|
|
}
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) {
|
|
list_del_init(&cmd->i_conn_node);
|
|
iscsit_free_cmd(cmd, false);
|
|
}
|
|
}
|
|
|
|
static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd)
|
|
{
|
|
u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE));
|
|
|
|
iov_count += ISCSI_IOV_DATA_BUFFER;
|
|
|
|
cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL);
|
|
if (!cmd->iov_data) {
|
|
pr_err("Unable to allocate cmd->iov_data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cmd->orig_iov_data_count = iov_count;
|
|
return 0;
|
|
}
|
|
|
|
int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
unsigned char *buf)
|
|
{
|
|
int data_direction, payload_length;
|
|
struct iscsi_scsi_req *hdr;
|
|
int iscsi_task_attr;
|
|
int sam_task_attr;
|
|
|
|
atomic_long_inc(&conn->sess->cmd_pdus);
|
|
|
|
hdr = (struct iscsi_scsi_req *) buf;
|
|
payload_length = ntoh24(hdr->dlength);
|
|
|
|
/* FIXME; Add checks for AdditionalHeaderSegment */
|
|
|
|
if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) &&
|
|
!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) {
|
|
pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
|
|
" not set. Bad iSCSI Initiator.\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
}
|
|
|
|
if (((hdr->flags & ISCSI_FLAG_CMD_READ) ||
|
|
(hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) {
|
|
/*
|
|
* From RFC-3720 Section 10.3.1:
|
|
*
|
|
* "Either or both of R and W MAY be 1 when either the
|
|
* Expected Data Transfer Length and/or Bidirectional Read
|
|
* Expected Data Transfer Length are 0"
|
|
*
|
|
* For this case, go ahead and clear the unnecssary bits
|
|
* to avoid any confusion with ->data_direction.
|
|
*/
|
|
hdr->flags &= ~ISCSI_FLAG_CMD_READ;
|
|
hdr->flags &= ~ISCSI_FLAG_CMD_WRITE;
|
|
|
|
pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
|
|
" set when Expected Data Transfer Length is 0 for"
|
|
" CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]);
|
|
}
|
|
|
|
if (!(hdr->flags & ISCSI_FLAG_CMD_READ) &&
|
|
!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) {
|
|
pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
|
|
" MUST be set if Expected Data Transfer Length is not 0."
|
|
" Bad iSCSI Initiator\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
}
|
|
|
|
if ((hdr->flags & ISCSI_FLAG_CMD_READ) &&
|
|
(hdr->flags & ISCSI_FLAG_CMD_WRITE)) {
|
|
pr_err("Bidirectional operations not supported!\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
}
|
|
|
|
if (hdr->opcode & ISCSI_OP_IMMEDIATE) {
|
|
pr_err("Illegally set Immediate Bit in iSCSI Initiator"
|
|
" Scsi Command PDU.\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
}
|
|
|
|
if (payload_length && !conn->sess->sess_ops->ImmediateData) {
|
|
pr_err("ImmediateData=No but DataSegmentLength=%u,"
|
|
" protocol error.\n", payload_length);
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
|
|
if ((be32_to_cpu(hdr->data_length) == payload_length) &&
|
|
(!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) {
|
|
pr_err("Expected Data Transfer Length and Length of"
|
|
" Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
|
|
" bit is not set protocol error\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
|
|
if (payload_length > be32_to_cpu(hdr->data_length)) {
|
|
pr_err("DataSegmentLength: %u is greater than"
|
|
" EDTL: %u, protocol error.\n", payload_length,
|
|
hdr->data_length);
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
|
|
if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) {
|
|
pr_err("DataSegmentLength: %u is greater than"
|
|
" MaxXmitDataSegmentLength: %u, protocol error.\n",
|
|
payload_length, conn->conn_ops->MaxXmitDataSegmentLength);
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
|
|
if (payload_length > conn->sess->sess_ops->FirstBurstLength) {
|
|
pr_err("DataSegmentLength: %u is greater than"
|
|
" FirstBurstLength: %u, protocol error.\n",
|
|
payload_length, conn->sess->sess_ops->FirstBurstLength);
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
}
|
|
|
|
data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE :
|
|
(hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE :
|
|
DMA_NONE;
|
|
|
|
cmd->data_direction = data_direction;
|
|
iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK;
|
|
/*
|
|
* Figure out the SAM Task Attribute for the incoming SCSI CDB
|
|
*/
|
|
if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) ||
|
|
(iscsi_task_attr == ISCSI_ATTR_SIMPLE))
|
|
sam_task_attr = TCM_SIMPLE_TAG;
|
|
else if (iscsi_task_attr == ISCSI_ATTR_ORDERED)
|
|
sam_task_attr = TCM_ORDERED_TAG;
|
|
else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE)
|
|
sam_task_attr = TCM_HEAD_TAG;
|
|
else if (iscsi_task_attr == ISCSI_ATTR_ACA)
|
|
sam_task_attr = TCM_ACA_TAG;
|
|
else {
|
|
pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
|
|
" TCM_SIMPLE_TAG\n", iscsi_task_attr);
|
|
sam_task_attr = TCM_SIMPLE_TAG;
|
|
}
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD;
|
|
cmd->i_state = ISTATE_NEW_CMD;
|
|
cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
|
|
cmd->immediate_data = (payload_length) ? 1 : 0;
|
|
cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) &&
|
|
(hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0);
|
|
if (cmd->unsolicited_data)
|
|
cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA;
|
|
|
|
conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
|
|
if (hdr->flags & ISCSI_FLAG_CMD_READ)
|
|
cmd->targ_xfer_tag = session_get_next_ttt(conn->sess);
|
|
else
|
|
cmd->targ_xfer_tag = 0xFFFFFFFF;
|
|
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
|
|
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
|
|
cmd->first_burst_len = payload_length;
|
|
|
|
if (!conn->sess->sess_ops->RDMAExtensions &&
|
|
cmd->data_direction == DMA_FROM_DEVICE) {
|
|
struct iscsi_datain_req *dr;
|
|
|
|
dr = iscsit_allocate_datain_req();
|
|
if (!dr)
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
|
|
iscsit_attach_datain_req(cmd, dr);
|
|
}
|
|
|
|
/*
|
|
* Initialize struct se_cmd descriptor from target_core_mod infrastructure
|
|
*/
|
|
transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops,
|
|
conn->sess->se_sess, be32_to_cpu(hdr->data_length),
|
|
cmd->data_direction, sam_task_attr,
|
|
cmd->sense_buffer + 2);
|
|
|
|
pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
|
|
" ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt,
|
|
hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length,
|
|
conn->cid);
|
|
|
|
target_get_sess_cmd(&cmd->se_cmd, true);
|
|
|
|
cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd,
|
|
scsilun_to_int(&hdr->lun));
|
|
if (cmd->sense_reason)
|
|
goto attach_cmd;
|
|
|
|
/* only used for printks or comparing with ->ref_task_tag */
|
|
cmd->se_cmd.tag = (__force u32)cmd->init_task_tag;
|
|
cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb);
|
|
if (cmd->sense_reason) {
|
|
if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) {
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
}
|
|
|
|
goto attach_cmd;
|
|
}
|
|
|
|
if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) {
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
}
|
|
|
|
attach_cmd:
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
/*
|
|
* Check if we need to delay processing because of ALUA
|
|
* Active/NonOptimized primary access state..
|
|
*/
|
|
core_alua_check_nonop_delay(&cmd->se_cmd);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_setup_scsi_cmd);
|
|
|
|
void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd)
|
|
{
|
|
iscsit_set_dataout_sequence_values(cmd);
|
|
|
|
spin_lock_bh(&cmd->dataout_timeout_lock);
|
|
iscsit_start_dataout_timer(cmd, cmd->conn);
|
|
spin_unlock_bh(&cmd->dataout_timeout_lock);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout);
|
|
|
|
int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_scsi_req *hdr)
|
|
{
|
|
int cmdsn_ret = 0;
|
|
/*
|
|
* Check the CmdSN against ExpCmdSN/MaxCmdSN here if
|
|
* the Immediate Bit is not set, and no Immediate
|
|
* Data is attached.
|
|
*
|
|
* A PDU/CmdSN carrying Immediate Data can only
|
|
* be processed after the DataCRC has passed.
|
|
* If the DataCRC fails, the CmdSN MUST NOT
|
|
* be acknowledged. (See below)
|
|
*/
|
|
if (!cmd->immediate_data) {
|
|
cmdsn_ret = iscsit_sequence_cmd(conn, cmd,
|
|
(unsigned char *)hdr, hdr->cmdsn);
|
|
if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
|
|
return -1;
|
|
else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
|
|
target_put_sess_cmd(&cmd->se_cmd);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
|
|
|
|
/*
|
|
* If no Immediate Data is attached, it's OK to return now.
|
|
*/
|
|
if (!cmd->immediate_data) {
|
|
if (!cmd->sense_reason && cmd->unsolicited_data)
|
|
iscsit_set_unsoliticed_dataout(cmd);
|
|
if (!cmd->sense_reason)
|
|
return 0;
|
|
|
|
target_put_sess_cmd(&cmd->se_cmd);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Early CHECK_CONDITIONs with ImmediateData never make it to command
|
|
* execution. These exceptions are processed in CmdSN order using
|
|
* iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below.
|
|
*/
|
|
if (cmd->sense_reason) {
|
|
if (cmd->reject_reason)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
/*
|
|
* Call directly into transport_generic_new_cmd() to perform
|
|
* the backend memory allocation.
|
|
*/
|
|
cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd);
|
|
if (cmd->sense_reason)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_process_scsi_cmd);
|
|
|
|
static int
|
|
iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr,
|
|
bool dump_payload)
|
|
{
|
|
int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
|
|
/*
|
|
* Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
|
|
*/
|
|
if (dump_payload)
|
|
goto after_immediate_data;
|
|
|
|
immed_ret = iscsit_handle_immediate_data(cmd, hdr,
|
|
cmd->first_burst_len);
|
|
after_immediate_data:
|
|
if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) {
|
|
/*
|
|
* A PDU/CmdSN carrying Immediate Data passed
|
|
* DataCRC, check against ExpCmdSN/MaxCmdSN if
|
|
* Immediate Bit is not set.
|
|
*/
|
|
cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd,
|
|
(unsigned char *)hdr, hdr->cmdsn);
|
|
if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
|
|
return -1;
|
|
|
|
if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
|
|
int rc;
|
|
|
|
rc = iscsit_dump_data_payload(cmd->conn,
|
|
cmd->first_burst_len, 1);
|
|
target_put_sess_cmd(&cmd->se_cmd);
|
|
return rc;
|
|
} else if (cmd->unsolicited_data)
|
|
iscsit_set_unsoliticed_dataout(cmd);
|
|
|
|
} else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) {
|
|
/*
|
|
* Immediate Data failed DataCRC and ERL>=1,
|
|
* silently drop this PDU and let the initiator
|
|
* plug the CmdSN gap.
|
|
*
|
|
* FIXME: Send Unsolicited NOPIN with reserved
|
|
* TTT here to help the initiator figure out
|
|
* the missing CmdSN, although they should be
|
|
* intelligent enough to determine the missing
|
|
* CmdSN and issue a retry to plug the sequence.
|
|
*/
|
|
cmd->i_state = ISTATE_REMOVE;
|
|
iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state);
|
|
} else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
unsigned char *buf)
|
|
{
|
|
struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf;
|
|
int rc, immed_data;
|
|
bool dump_payload = false;
|
|
|
|
rc = iscsit_setup_scsi_cmd(conn, cmd, buf);
|
|
if (rc < 0)
|
|
return 0;
|
|
/*
|
|
* Allocation iovecs needed for struct socket operations for
|
|
* traditional iSCSI block I/O.
|
|
*/
|
|
if (iscsit_allocate_iovecs(cmd) < 0) {
|
|
return iscsit_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
}
|
|
immed_data = cmd->immediate_data;
|
|
|
|
rc = iscsit_process_scsi_cmd(conn, cmd, hdr);
|
|
if (rc < 0)
|
|
return rc;
|
|
else if (rc > 0)
|
|
dump_payload = true;
|
|
|
|
if (!immed_data)
|
|
return 0;
|
|
|
|
return iscsit_get_immediate_data(cmd, hdr, dump_payload);
|
|
}
|
|
|
|
static u32 iscsit_do_crypto_hash_sg(
|
|
struct ahash_request *hash,
|
|
struct iscsi_cmd *cmd,
|
|
u32 data_offset,
|
|
u32 data_length,
|
|
u32 padding,
|
|
u8 *pad_bytes)
|
|
{
|
|
u32 data_crc;
|
|
struct scatterlist *sg;
|
|
unsigned int page_off;
|
|
|
|
crypto_ahash_init(hash);
|
|
|
|
sg = cmd->first_data_sg;
|
|
page_off = cmd->first_data_sg_off;
|
|
|
|
while (data_length) {
|
|
u32 cur_len = min_t(u32, data_length, (sg->length - page_off));
|
|
|
|
ahash_request_set_crypt(hash, sg, NULL, cur_len);
|
|
crypto_ahash_update(hash);
|
|
|
|
data_length -= cur_len;
|
|
page_off = 0;
|
|
/* iscsit_map_iovec has already checked for invalid sg pointers */
|
|
sg = sg_next(sg);
|
|
}
|
|
|
|
if (padding) {
|
|
struct scatterlist pad_sg;
|
|
|
|
sg_init_one(&pad_sg, pad_bytes, padding);
|
|
ahash_request_set_crypt(hash, &pad_sg, (u8 *)&data_crc,
|
|
padding);
|
|
crypto_ahash_finup(hash);
|
|
} else {
|
|
ahash_request_set_crypt(hash, NULL, (u8 *)&data_crc, 0);
|
|
crypto_ahash_final(hash);
|
|
}
|
|
|
|
return data_crc;
|
|
}
|
|
|
|
static void iscsit_do_crypto_hash_buf(
|
|
struct ahash_request *hash,
|
|
const void *buf,
|
|
u32 payload_length,
|
|
u32 padding,
|
|
u8 *pad_bytes,
|
|
u8 *data_crc)
|
|
{
|
|
struct scatterlist sg[2];
|
|
|
|
sg_init_table(sg, ARRAY_SIZE(sg));
|
|
sg_set_buf(sg, buf, payload_length);
|
|
sg_set_buf(sg + 1, pad_bytes, padding);
|
|
|
|
ahash_request_set_crypt(hash, sg, data_crc, payload_length + padding);
|
|
|
|
crypto_ahash_digest(hash);
|
|
}
|
|
|
|
int
|
|
__iscsit_check_dataout_hdr(struct iscsi_conn *conn, void *buf,
|
|
struct iscsi_cmd *cmd, u32 payload_length,
|
|
bool *success)
|
|
{
|
|
struct iscsi_data *hdr = buf;
|
|
struct se_cmd *se_cmd;
|
|
int rc;
|
|
|
|
/* iSCSI write */
|
|
atomic_long_add(payload_length, &conn->sess->rx_data_octets);
|
|
|
|
pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
|
|
" DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
|
|
hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset),
|
|
payload_length, conn->cid);
|
|
|
|
if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
|
|
pr_err("Command ITT: 0x%08x received DataOUT after"
|
|
" last DataOUT received, dumping payload\n",
|
|
cmd->init_task_tag);
|
|
return iscsit_dump_data_payload(conn, payload_length, 1);
|
|
}
|
|
|
|
if (cmd->data_direction != DMA_TO_DEVICE) {
|
|
pr_err("Command ITT: 0x%08x received DataOUT for a"
|
|
" NON-WRITE command.\n", cmd->init_task_tag);
|
|
return iscsit_dump_data_payload(conn, payload_length, 1);
|
|
}
|
|
se_cmd = &cmd->se_cmd;
|
|
iscsit_mod_dataout_timer(cmd);
|
|
|
|
if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) {
|
|
pr_err("DataOut Offset: %u, Length %u greater than"
|
|
" iSCSI Command EDTL %u, protocol error.\n",
|
|
hdr->offset, payload_length, cmd->se_cmd.data_length);
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
}
|
|
|
|
if (cmd->unsolicited_data) {
|
|
int dump_unsolicited_data = 0;
|
|
|
|
if (conn->sess->sess_ops->InitialR2T) {
|
|
pr_err("Received unexpected unsolicited data"
|
|
" while InitialR2T=Yes, protocol error.\n");
|
|
transport_send_check_condition_and_sense(&cmd->se_cmd,
|
|
TCM_UNEXPECTED_UNSOLICITED_DATA, 0);
|
|
return -1;
|
|
}
|
|
/*
|
|
* Special case for dealing with Unsolicited DataOUT
|
|
* and Unsupported SAM WRITE Opcodes and SE resource allocation
|
|
* failures;
|
|
*/
|
|
|
|
/* Something's amiss if we're not in WRITE_PENDING state... */
|
|
WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING);
|
|
if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE))
|
|
dump_unsolicited_data = 1;
|
|
|
|
if (dump_unsolicited_data) {
|
|
/*
|
|
* Check if a delayed TASK_ABORTED status needs to
|
|
* be sent now if the ISCSI_FLAG_CMD_FINAL has been
|
|
* received with the unsolicited data out.
|
|
*/
|
|
if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
|
|
iscsit_stop_dataout_timer(cmd);
|
|
|
|
transport_check_aborted_status(se_cmd,
|
|
(hdr->flags & ISCSI_FLAG_CMD_FINAL));
|
|
return iscsit_dump_data_payload(conn, payload_length, 1);
|
|
}
|
|
} else {
|
|
/*
|
|
* For the normal solicited data path:
|
|
*
|
|
* Check for a delayed TASK_ABORTED status and dump any
|
|
* incoming data out payload if one exists. Also, when the
|
|
* ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
|
|
* data out sequence, we decrement outstanding_r2ts. Once
|
|
* outstanding_r2ts reaches zero, go ahead and send the delayed
|
|
* TASK_ABORTED status.
|
|
*/
|
|
if (se_cmd->transport_state & CMD_T_ABORTED) {
|
|
if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
|
|
if (--cmd->outstanding_r2ts < 1) {
|
|
iscsit_stop_dataout_timer(cmd);
|
|
transport_check_aborted_status(
|
|
se_cmd, 1);
|
|
}
|
|
|
|
return iscsit_dump_data_payload(conn, payload_length, 1);
|
|
}
|
|
}
|
|
/*
|
|
* Perform DataSN, DataSequenceInOrder, DataPDUInOrder, and
|
|
* within-command recovery checks before receiving the payload.
|
|
*/
|
|
rc = iscsit_check_pre_dataout(cmd, buf);
|
|
if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)
|
|
return 0;
|
|
else if (rc == DATAOUT_CANNOT_RECOVER)
|
|
return -1;
|
|
*success = true;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(__iscsit_check_dataout_hdr);
|
|
|
|
int
|
|
iscsit_check_dataout_hdr(struct iscsi_conn *conn, void *buf,
|
|
struct iscsi_cmd **out_cmd)
|
|
{
|
|
struct iscsi_data *hdr = buf;
|
|
struct iscsi_cmd *cmd;
|
|
u32 payload_length = ntoh24(hdr->dlength);
|
|
int rc;
|
|
bool success = false;
|
|
|
|
if (!payload_length) {
|
|
pr_warn_ratelimited("DataOUT payload is ZERO, ignoring.\n");
|
|
return 0;
|
|
}
|
|
|
|
if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) {
|
|
pr_err_ratelimited("DataSegmentLength: %u is greater than"
|
|
" MaxXmitDataSegmentLength: %u\n", payload_length,
|
|
conn->conn_ops->MaxXmitDataSegmentLength);
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
|
|
cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, payload_length);
|
|
if (!cmd)
|
|
return 0;
|
|
|
|
rc = __iscsit_check_dataout_hdr(conn, buf, cmd, payload_length, &success);
|
|
|
|
if (success)
|
|
*out_cmd = cmd;
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_check_dataout_hdr);
|
|
|
|
static int
|
|
iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_data *hdr)
|
|
{
|
|
struct kvec *iov;
|
|
u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0;
|
|
u32 payload_length = ntoh24(hdr->dlength);
|
|
int iov_ret, data_crc_failed = 0;
|
|
|
|
rx_size += payload_length;
|
|
iov = &cmd->iov_data[0];
|
|
|
|
iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset),
|
|
payload_length);
|
|
if (iov_ret < 0)
|
|
return -1;
|
|
|
|
iov_count += iov_ret;
|
|
|
|
padding = ((-payload_length) & 3);
|
|
if (padding != 0) {
|
|
iov[iov_count].iov_base = cmd->pad_bytes;
|
|
iov[iov_count++].iov_len = padding;
|
|
rx_size += padding;
|
|
pr_debug("Receiving %u padding bytes.\n", padding);
|
|
}
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
iov[iov_count].iov_base = &checksum;
|
|
iov[iov_count++].iov_len = ISCSI_CRC_LEN;
|
|
rx_size += ISCSI_CRC_LEN;
|
|
}
|
|
|
|
rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size);
|
|
|
|
iscsit_unmap_iovec(cmd);
|
|
|
|
if (rx_got != rx_size)
|
|
return -1;
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
u32 data_crc;
|
|
|
|
data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd,
|
|
be32_to_cpu(hdr->offset),
|
|
payload_length, padding,
|
|
cmd->pad_bytes);
|
|
|
|
if (checksum != data_crc) {
|
|
pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
|
|
" DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
|
|
" does not match computed 0x%08x\n",
|
|
hdr->itt, hdr->offset, payload_length,
|
|
hdr->datasn, checksum, data_crc);
|
|
data_crc_failed = 1;
|
|
} else {
|
|
pr_debug("Got CRC32C DataDigest 0x%08x for"
|
|
" %u bytes of Data Out\n", checksum,
|
|
payload_length);
|
|
}
|
|
}
|
|
|
|
return data_crc_failed;
|
|
}
|
|
|
|
int
|
|
iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr,
|
|
bool data_crc_failed)
|
|
{
|
|
struct iscsi_conn *conn = cmd->conn;
|
|
int rc, ooo_cmdsn;
|
|
/*
|
|
* Increment post receive data and CRC values or perform
|
|
* within-command recovery.
|
|
*/
|
|
rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed);
|
|
if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY))
|
|
return 0;
|
|
else if (rc == DATAOUT_SEND_R2T) {
|
|
iscsit_set_dataout_sequence_values(cmd);
|
|
conn->conn_transport->iscsit_get_dataout(conn, cmd, false);
|
|
} else if (rc == DATAOUT_SEND_TO_TRANSPORT) {
|
|
/*
|
|
* Handle extra special case for out of order
|
|
* Unsolicited Data Out.
|
|
*/
|
|
spin_lock_bh(&cmd->istate_lock);
|
|
ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN);
|
|
cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
|
|
cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
|
|
spin_unlock_bh(&cmd->istate_lock);
|
|
|
|
iscsit_stop_dataout_timer(cmd);
|
|
if (ooo_cmdsn)
|
|
return 0;
|
|
target_execute_cmd(&cmd->se_cmd);
|
|
return 0;
|
|
} else /* DATAOUT_CANNOT_RECOVER */
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_check_dataout_payload);
|
|
|
|
static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
|
|
{
|
|
struct iscsi_cmd *cmd = NULL;
|
|
struct iscsi_data *hdr = (struct iscsi_data *)buf;
|
|
int rc;
|
|
bool data_crc_failed = false;
|
|
|
|
rc = iscsit_check_dataout_hdr(conn, buf, &cmd);
|
|
if (rc < 0)
|
|
return 0;
|
|
else if (!cmd)
|
|
return 0;
|
|
|
|
rc = iscsit_get_dataout(conn, cmd, hdr);
|
|
if (rc < 0)
|
|
return rc;
|
|
else if (rc > 0)
|
|
data_crc_failed = true;
|
|
|
|
return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed);
|
|
}
|
|
|
|
int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_nopout *hdr)
|
|
{
|
|
u32 payload_length = ntoh24(hdr->dlength);
|
|
|
|
if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) {
|
|
pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n");
|
|
if (!cmd)
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
}
|
|
|
|
if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
|
|
pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
|
|
" not set, protocol error.\n");
|
|
if (!cmd)
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
}
|
|
|
|
if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) {
|
|
pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
|
|
" greater than MaxXmitDataSegmentLength: %u, protocol"
|
|
" error.\n", payload_length,
|
|
conn->conn_ops->MaxXmitDataSegmentLength);
|
|
if (!cmd)
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
}
|
|
|
|
pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x,"
|
|
" CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
|
|
hdr->itt == RESERVED_ITT ? "Response" : "Request",
|
|
hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn,
|
|
payload_length);
|
|
/*
|
|
* This is not a response to a Unsolicited NopIN, which means
|
|
* it can either be a NOPOUT ping request (with a valid ITT),
|
|
* or a NOPOUT not requesting a NOPIN (with a reserved ITT).
|
|
* Either way, make sure we allocate an struct iscsi_cmd, as both
|
|
* can contain ping data.
|
|
*/
|
|
if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) {
|
|
cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT;
|
|
cmd->i_state = ISTATE_SEND_NOPIN;
|
|
cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ?
|
|
1 : 0);
|
|
conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
|
|
cmd->targ_xfer_tag = 0xFFFFFFFF;
|
|
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
|
|
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
|
|
cmd->data_direction = DMA_NONE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_setup_nop_out);
|
|
|
|
int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_nopout *hdr)
|
|
{
|
|
struct iscsi_cmd *cmd_p = NULL;
|
|
int cmdsn_ret = 0;
|
|
/*
|
|
* Initiator is expecting a NopIN ping reply..
|
|
*/
|
|
if (hdr->itt != RESERVED_ITT) {
|
|
if (!cmd)
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
|
|
|
|
if (hdr->opcode & ISCSI_OP_IMMEDIATE) {
|
|
iscsit_add_cmd_to_response_queue(cmd, conn,
|
|
cmd->i_state);
|
|
return 0;
|
|
}
|
|
|
|
cmdsn_ret = iscsit_sequence_cmd(conn, cmd,
|
|
(unsigned char *)hdr, hdr->cmdsn);
|
|
if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
|
|
return 0;
|
|
if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
/*
|
|
* This was a response to a unsolicited NOPIN ping.
|
|
*/
|
|
if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) {
|
|
cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt));
|
|
if (!cmd_p)
|
|
return -EINVAL;
|
|
|
|
iscsit_stop_nopin_response_timer(conn);
|
|
|
|
cmd_p->i_state = ISTATE_REMOVE;
|
|
iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state);
|
|
|
|
iscsit_start_nopin_timer(conn);
|
|
return 0;
|
|
}
|
|
/*
|
|
* Otherwise, initiator is not expecting a NOPIN is response.
|
|
* Just ignore for now.
|
|
*/
|
|
|
|
if (cmd)
|
|
iscsit_free_cmd(cmd, false);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_process_nop_out);
|
|
|
|
static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
unsigned char *buf)
|
|
{
|
|
unsigned char *ping_data = NULL;
|
|
struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf;
|
|
struct kvec *iov = NULL;
|
|
u32 payload_length = ntoh24(hdr->dlength);
|
|
int ret;
|
|
|
|
ret = iscsit_setup_nop_out(conn, cmd, hdr);
|
|
if (ret < 0)
|
|
return 0;
|
|
/*
|
|
* Handle NOP-OUT payload for traditional iSCSI sockets
|
|
*/
|
|
if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) {
|
|
u32 checksum, data_crc, padding = 0;
|
|
int niov = 0, rx_got, rx_size = payload_length;
|
|
|
|
ping_data = kzalloc(payload_length + 1, GFP_KERNEL);
|
|
if (!ping_data) {
|
|
pr_err("Unable to allocate memory for"
|
|
" NOPOUT ping data.\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
iov = &cmd->iov_misc[0];
|
|
iov[niov].iov_base = ping_data;
|
|
iov[niov++].iov_len = payload_length;
|
|
|
|
padding = ((-payload_length) & 3);
|
|
if (padding != 0) {
|
|
pr_debug("Receiving %u additional bytes"
|
|
" for padding.\n", padding);
|
|
iov[niov].iov_base = &cmd->pad_bytes;
|
|
iov[niov++].iov_len = padding;
|
|
rx_size += padding;
|
|
}
|
|
if (conn->conn_ops->DataDigest) {
|
|
iov[niov].iov_base = &checksum;
|
|
iov[niov++].iov_len = ISCSI_CRC_LEN;
|
|
rx_size += ISCSI_CRC_LEN;
|
|
}
|
|
|
|
rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size);
|
|
if (rx_got != rx_size) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
|
|
ping_data, payload_length,
|
|
padding, cmd->pad_bytes,
|
|
(u8 *)&data_crc);
|
|
|
|
if (checksum != data_crc) {
|
|
pr_err("Ping data CRC32C DataDigest"
|
|
" 0x%08x does not match computed 0x%08x\n",
|
|
checksum, data_crc);
|
|
if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
|
|
pr_err("Unable to recover from"
|
|
" NOPOUT Ping DataCRC failure while in"
|
|
" ERL=0.\n");
|
|
ret = -1;
|
|
goto out;
|
|
} else {
|
|
/*
|
|
* Silently drop this PDU and let the
|
|
* initiator plug the CmdSN gap.
|
|
*/
|
|
pr_debug("Dropping NOPOUT"
|
|
" Command CmdSN: 0x%08x due to"
|
|
" DataCRC error.\n", hdr->cmdsn);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
} else {
|
|
pr_debug("Got CRC32C DataDigest"
|
|
" 0x%08x for %u bytes of ping data.\n",
|
|
checksum, payload_length);
|
|
}
|
|
}
|
|
|
|
ping_data[payload_length] = '\0';
|
|
/*
|
|
* Attach ping data to struct iscsi_cmd->buf_ptr.
|
|
*/
|
|
cmd->buf_ptr = ping_data;
|
|
cmd->buf_ptr_size = payload_length;
|
|
|
|
pr_debug("Got %u bytes of NOPOUT ping"
|
|
" data.\n", payload_length);
|
|
pr_debug("Ping Data: \"%s\"\n", ping_data);
|
|
}
|
|
|
|
return iscsit_process_nop_out(conn, cmd, hdr);
|
|
out:
|
|
if (cmd)
|
|
iscsit_free_cmd(cmd, false);
|
|
|
|
kfree(ping_data);
|
|
return ret;
|
|
}
|
|
|
|
static enum tcm_tmreq_table iscsit_convert_tmf(u8 iscsi_tmf)
|
|
{
|
|
switch (iscsi_tmf) {
|
|
case ISCSI_TM_FUNC_ABORT_TASK:
|
|
return TMR_ABORT_TASK;
|
|
case ISCSI_TM_FUNC_ABORT_TASK_SET:
|
|
return TMR_ABORT_TASK_SET;
|
|
case ISCSI_TM_FUNC_CLEAR_ACA:
|
|
return TMR_CLEAR_ACA;
|
|
case ISCSI_TM_FUNC_CLEAR_TASK_SET:
|
|
return TMR_CLEAR_TASK_SET;
|
|
case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
|
|
return TMR_LUN_RESET;
|
|
case ISCSI_TM_FUNC_TARGET_WARM_RESET:
|
|
return TMR_TARGET_WARM_RESET;
|
|
case ISCSI_TM_FUNC_TARGET_COLD_RESET:
|
|
return TMR_TARGET_COLD_RESET;
|
|
default:
|
|
return TMR_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
int
|
|
iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
unsigned char *buf)
|
|
{
|
|
struct se_tmr_req *se_tmr;
|
|
struct iscsi_tmr_req *tmr_req;
|
|
struct iscsi_tm *hdr;
|
|
int out_of_order_cmdsn = 0, ret;
|
|
bool sess_ref = false;
|
|
u8 function, tcm_function = TMR_UNKNOWN;
|
|
|
|
hdr = (struct iscsi_tm *) buf;
|
|
hdr->flags &= ~ISCSI_FLAG_CMD_FINAL;
|
|
function = hdr->flags;
|
|
|
|
pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
|
|
" 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
|
|
" 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function,
|
|
hdr->rtt, hdr->refcmdsn, conn->cid);
|
|
|
|
if ((function != ISCSI_TM_FUNC_ABORT_TASK) &&
|
|
((function != ISCSI_TM_FUNC_TASK_REASSIGN) &&
|
|
hdr->rtt != RESERVED_ITT)) {
|
|
pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
|
|
hdr->rtt = RESERVED_ITT;
|
|
}
|
|
|
|
if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) &&
|
|
!(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
|
|
pr_err("Task Management Request TASK_REASSIGN not"
|
|
" issued as immediate command, bad iSCSI Initiator"
|
|
"implementation\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
if ((function != ISCSI_TM_FUNC_ABORT_TASK) &&
|
|
be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG)
|
|
hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG);
|
|
|
|
cmd->data_direction = DMA_NONE;
|
|
|
|
cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL);
|
|
if (!cmd->tmr_req) {
|
|
pr_err("Unable to allocate memory for"
|
|
" Task Management command!\n");
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES,
|
|
buf);
|
|
}
|
|
|
|
/*
|
|
* TASK_REASSIGN for ERL=2 / connection stays inside of
|
|
* LIO-Target $FABRIC_MOD
|
|
*/
|
|
if (function != ISCSI_TM_FUNC_TASK_REASSIGN) {
|
|
transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops,
|
|
conn->sess->se_sess, 0, DMA_NONE,
|
|
TCM_SIMPLE_TAG, cmd->sense_buffer + 2);
|
|
|
|
target_get_sess_cmd(&cmd->se_cmd, true);
|
|
sess_ref = true;
|
|
tcm_function = iscsit_convert_tmf(function);
|
|
if (tcm_function == TMR_UNKNOWN) {
|
|
pr_err("Unknown iSCSI TMR Function:"
|
|
" 0x%02x\n", function);
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
}
|
|
}
|
|
ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, tcm_function,
|
|
GFP_KERNEL);
|
|
if (ret < 0)
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
|
|
cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req;
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC;
|
|
cmd->i_state = ISTATE_SEND_TASKMGTRSP;
|
|
cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
|
|
cmd->init_task_tag = hdr->itt;
|
|
cmd->targ_xfer_tag = 0xFFFFFFFF;
|
|
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
|
|
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
|
|
se_tmr = cmd->se_cmd.se_tmr_req;
|
|
tmr_req = cmd->tmr_req;
|
|
/*
|
|
* Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
|
|
*/
|
|
if (function != ISCSI_TM_FUNC_TASK_REASSIGN) {
|
|
ret = transport_lookup_tmr_lun(&cmd->se_cmd,
|
|
scsilun_to_int(&hdr->lun));
|
|
if (ret < 0) {
|
|
se_tmr->response = ISCSI_TMF_RSP_NO_LUN;
|
|
goto attach;
|
|
}
|
|
}
|
|
|
|
switch (function) {
|
|
case ISCSI_TM_FUNC_ABORT_TASK:
|
|
se_tmr->response = iscsit_tmr_abort_task(cmd, buf);
|
|
if (se_tmr->response)
|
|
goto attach;
|
|
break;
|
|
case ISCSI_TM_FUNC_ABORT_TASK_SET:
|
|
case ISCSI_TM_FUNC_CLEAR_ACA:
|
|
case ISCSI_TM_FUNC_CLEAR_TASK_SET:
|
|
case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
|
|
break;
|
|
case ISCSI_TM_FUNC_TARGET_WARM_RESET:
|
|
if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) {
|
|
se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED;
|
|
goto attach;
|
|
}
|
|
break;
|
|
case ISCSI_TM_FUNC_TARGET_COLD_RESET:
|
|
if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) {
|
|
se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED;
|
|
goto attach;
|
|
}
|
|
break;
|
|
case ISCSI_TM_FUNC_TASK_REASSIGN:
|
|
se_tmr->response = iscsit_tmr_task_reassign(cmd, buf);
|
|
/*
|
|
* Perform sanity checks on the ExpDataSN only if the
|
|
* TASK_REASSIGN was successful.
|
|
*/
|
|
if (se_tmr->response)
|
|
break;
|
|
|
|
if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0)
|
|
return iscsit_add_reject_cmd(cmd,
|
|
ISCSI_REASON_BOOKMARK_INVALID, buf);
|
|
break;
|
|
default:
|
|
pr_err("Unknown TMR function: 0x%02x, protocol"
|
|
" error.\n", function);
|
|
se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED;
|
|
goto attach;
|
|
}
|
|
|
|
if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) &&
|
|
(se_tmr->response == ISCSI_TMF_RSP_COMPLETE))
|
|
se_tmr->call_transport = 1;
|
|
attach:
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
|
|
int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn);
|
|
if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP)
|
|
out_of_order_cmdsn = 1;
|
|
else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
|
|
return 0;
|
|
else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
|
|
return -1;
|
|
}
|
|
iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
|
|
|
|
if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE))
|
|
return 0;
|
|
/*
|
|
* Found the referenced task, send to transport for processing.
|
|
*/
|
|
if (se_tmr->call_transport)
|
|
return transport_generic_handle_tmr(&cmd->se_cmd);
|
|
|
|
/*
|
|
* Could not find the referenced LUN, task, or Task Management
|
|
* command not authorized or supported. Change state and
|
|
* let the tx_thread send the response.
|
|
*
|
|
* For connection recovery, this is also the default action for
|
|
* TMR TASK_REASSIGN.
|
|
*/
|
|
if (sess_ref) {
|
|
pr_debug("Handle TMR, using sess_ref=true check\n");
|
|
target_put_sess_cmd(&cmd->se_cmd);
|
|
}
|
|
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd);
|
|
|
|
/* #warning FIXME: Support Text Command parameters besides SendTargets */
|
|
int
|
|
iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_text *hdr)
|
|
{
|
|
u32 payload_length = ntoh24(hdr->dlength);
|
|
|
|
if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) {
|
|
pr_err("Unable to accept text parameter length: %u"
|
|
"greater than MaxXmitDataSegmentLength %u.\n",
|
|
payload_length, conn->conn_ops->MaxXmitDataSegmentLength);
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
}
|
|
|
|
if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) ||
|
|
(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) {
|
|
pr_err("Multi sequence text commands currently not supported\n");
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED,
|
|
(unsigned char *)hdr);
|
|
}
|
|
|
|
pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
|
|
" ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn,
|
|
hdr->exp_statsn, payload_length);
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_TEXT;
|
|
cmd->i_state = ISTATE_SEND_TEXTRSP;
|
|
cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
|
|
conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
|
|
cmd->targ_xfer_tag = 0xFFFFFFFF;
|
|
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
|
|
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
|
|
cmd->data_direction = DMA_NONE;
|
|
cmd->text_in_ptr = NULL;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_setup_text_cmd);
|
|
|
|
int
|
|
iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
struct iscsi_text *hdr)
|
|
{
|
|
unsigned char *text_in = cmd->text_in_ptr, *text_ptr;
|
|
int cmdsn_ret;
|
|
|
|
if (!text_in) {
|
|
cmd->targ_xfer_tag = be32_to_cpu(hdr->ttt);
|
|
if (cmd->targ_xfer_tag == 0xFFFFFFFF) {
|
|
pr_err("Unable to locate text_in buffer for sendtargets"
|
|
" discovery\n");
|
|
goto reject;
|
|
}
|
|
goto empty_sendtargets;
|
|
}
|
|
if (strncmp("SendTargets", text_in, 11) != 0) {
|
|
pr_err("Received Text Data that is not"
|
|
" SendTargets, cannot continue.\n");
|
|
goto reject;
|
|
}
|
|
text_ptr = strchr(text_in, '=');
|
|
if (!text_ptr) {
|
|
pr_err("No \"=\" separator found in Text Data,"
|
|
" cannot continue.\n");
|
|
goto reject;
|
|
}
|
|
if (!strncmp("=All", text_ptr, 4)) {
|
|
cmd->cmd_flags |= ICF_SENDTARGETS_ALL;
|
|
} else if (!strncmp("=iqn.", text_ptr, 5) ||
|
|
!strncmp("=eui.", text_ptr, 5)) {
|
|
cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE;
|
|
} else {
|
|
pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr);
|
|
goto reject;
|
|
}
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
empty_sendtargets:
|
|
iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
|
|
|
|
if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
|
|
cmdsn_ret = iscsit_sequence_cmd(conn, cmd,
|
|
(unsigned char *)hdr, hdr->cmdsn);
|
|
if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
return iscsit_execute_cmd(cmd, 0);
|
|
|
|
reject:
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR,
|
|
(unsigned char *)hdr);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_process_text_cmd);
|
|
|
|
static int
|
|
iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
unsigned char *buf)
|
|
{
|
|
struct iscsi_text *hdr = (struct iscsi_text *)buf;
|
|
char *text_in = NULL;
|
|
u32 payload_length = ntoh24(hdr->dlength);
|
|
int rx_size, rc;
|
|
|
|
rc = iscsit_setup_text_cmd(conn, cmd, hdr);
|
|
if (rc < 0)
|
|
return 0;
|
|
|
|
rx_size = payload_length;
|
|
if (payload_length) {
|
|
u32 checksum = 0, data_crc = 0;
|
|
u32 padding = 0, pad_bytes = 0;
|
|
int niov = 0, rx_got;
|
|
struct kvec iov[3];
|
|
|
|
text_in = kzalloc(payload_length, GFP_KERNEL);
|
|
if (!text_in) {
|
|
pr_err("Unable to allocate memory for"
|
|
" incoming text parameters\n");
|
|
goto reject;
|
|
}
|
|
cmd->text_in_ptr = text_in;
|
|
|
|
memset(iov, 0, 3 * sizeof(struct kvec));
|
|
iov[niov].iov_base = text_in;
|
|
iov[niov++].iov_len = payload_length;
|
|
|
|
padding = ((-payload_length) & 3);
|
|
if (padding != 0) {
|
|
iov[niov].iov_base = &pad_bytes;
|
|
iov[niov++].iov_len = padding;
|
|
rx_size += padding;
|
|
pr_debug("Receiving %u additional bytes"
|
|
" for padding.\n", padding);
|
|
}
|
|
if (conn->conn_ops->DataDigest) {
|
|
iov[niov].iov_base = &checksum;
|
|
iov[niov++].iov_len = ISCSI_CRC_LEN;
|
|
rx_size += ISCSI_CRC_LEN;
|
|
}
|
|
|
|
rx_got = rx_data(conn, &iov[0], niov, rx_size);
|
|
if (rx_got != rx_size)
|
|
goto reject;
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
|
|
text_in, payload_length,
|
|
padding, (u8 *)&pad_bytes,
|
|
(u8 *)&data_crc);
|
|
|
|
if (checksum != data_crc) {
|
|
pr_err("Text data CRC32C DataDigest"
|
|
" 0x%08x does not match computed"
|
|
" 0x%08x\n", checksum, data_crc);
|
|
if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
|
|
pr_err("Unable to recover from"
|
|
" Text Data digest failure while in"
|
|
" ERL=0.\n");
|
|
goto reject;
|
|
} else {
|
|
/*
|
|
* Silently drop this PDU and let the
|
|
* initiator plug the CmdSN gap.
|
|
*/
|
|
pr_debug("Dropping Text"
|
|
" Command CmdSN: 0x%08x due to"
|
|
" DataCRC error.\n", hdr->cmdsn);
|
|
kfree(text_in);
|
|
return 0;
|
|
}
|
|
} else {
|
|
pr_debug("Got CRC32C DataDigest"
|
|
" 0x%08x for %u bytes of text data.\n",
|
|
checksum, payload_length);
|
|
}
|
|
}
|
|
text_in[payload_length - 1] = '\0';
|
|
pr_debug("Successfully read %d bytes of text"
|
|
" data.\n", payload_length);
|
|
}
|
|
|
|
return iscsit_process_text_cmd(conn, cmd, hdr);
|
|
|
|
reject:
|
|
kfree(cmd->text_in_ptr);
|
|
cmd->text_in_ptr = NULL;
|
|
return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf);
|
|
}
|
|
|
|
int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_conn *conn_p;
|
|
struct iscsi_session *sess = conn->sess;
|
|
|
|
pr_debug("Received logout request CLOSESESSION on CID: %hu"
|
|
" for SID: %u.\n", conn->cid, conn->sess->sid);
|
|
|
|
atomic_set(&sess->session_logout, 1);
|
|
atomic_set(&conn->conn_logout_remove, 1);
|
|
conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION;
|
|
|
|
iscsit_inc_conn_usage_count(conn);
|
|
iscsit_inc_session_usage_count(sess);
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) {
|
|
if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN)
|
|
continue;
|
|
|
|
pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
|
|
conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT;
|
|
}
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_conn *l_conn;
|
|
struct iscsi_session *sess = conn->sess;
|
|
|
|
pr_debug("Received logout request CLOSECONNECTION for CID:"
|
|
" %hu on CID: %hu.\n", cmd->logout_cid, conn->cid);
|
|
|
|
/*
|
|
* A Logout Request with a CLOSECONNECTION reason code for a CID
|
|
* can arrive on a connection with a differing CID.
|
|
*/
|
|
if (conn->cid == cmd->logout_cid) {
|
|
spin_lock_bh(&conn->state_lock);
|
|
pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
|
|
conn->conn_state = TARG_CONN_STATE_IN_LOGOUT;
|
|
|
|
atomic_set(&conn->conn_logout_remove, 1);
|
|
conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION;
|
|
iscsit_inc_conn_usage_count(conn);
|
|
|
|
spin_unlock_bh(&conn->state_lock);
|
|
} else {
|
|
/*
|
|
* Handle all different cid CLOSECONNECTION requests in
|
|
* iscsit_logout_post_handler_diffcid() as to give enough
|
|
* time for any non immediate command's CmdSN to be
|
|
* acknowledged on the connection in question.
|
|
*
|
|
* Here we simply make sure the CID is still around.
|
|
*/
|
|
l_conn = iscsit_get_conn_from_cid(sess,
|
|
cmd->logout_cid);
|
|
if (!l_conn) {
|
|
cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND;
|
|
iscsit_add_cmd_to_response_queue(cmd, conn,
|
|
cmd->i_state);
|
|
return 0;
|
|
}
|
|
|
|
iscsit_dec_conn_usage_count(l_conn);
|
|
}
|
|
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_session *sess = conn->sess;
|
|
|
|
pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
|
|
" CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid);
|
|
|
|
if (sess->sess_ops->ErrorRecoveryLevel != 2) {
|
|
pr_err("Received Logout Request REMOVECONNFORRECOVERY"
|
|
" while ERL!=2.\n");
|
|
cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED;
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
return 0;
|
|
}
|
|
|
|
if (conn->cid == cmd->logout_cid) {
|
|
pr_err("Received Logout Request REMOVECONNFORRECOVERY"
|
|
" with CID: %hu on CID: %hu, implementation error.\n",
|
|
cmd->logout_cid, conn->cid);
|
|
cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED;
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
return 0;
|
|
}
|
|
|
|
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
|
|
unsigned char *buf)
|
|
{
|
|
int cmdsn_ret, logout_remove = 0;
|
|
u8 reason_code = 0;
|
|
struct iscsi_logout *hdr;
|
|
struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn);
|
|
|
|
hdr = (struct iscsi_logout *) buf;
|
|
reason_code = (hdr->flags & 0x7f);
|
|
|
|
if (tiqn) {
|
|
spin_lock(&tiqn->logout_stats.lock);
|
|
if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION)
|
|
tiqn->logout_stats.normal_logouts++;
|
|
else
|
|
tiqn->logout_stats.abnormal_logouts++;
|
|
spin_unlock(&tiqn->logout_stats.lock);
|
|
}
|
|
|
|
pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
|
|
" ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
|
|
hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code,
|
|
hdr->cid, conn->cid);
|
|
|
|
if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) {
|
|
pr_err("Received logout request on connection that"
|
|
" is not in logged in state, ignoring request.\n");
|
|
iscsit_free_cmd(cmd, false);
|
|
return 0;
|
|
}
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_LOGOUT;
|
|
cmd->i_state = ISTATE_SEND_LOGOUTRSP;
|
|
cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
|
|
conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
|
|
cmd->targ_xfer_tag = 0xFFFFFFFF;
|
|
cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
|
|
cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn);
|
|
cmd->logout_cid = be16_to_cpu(hdr->cid);
|
|
cmd->logout_reason = reason_code;
|
|
cmd->data_direction = DMA_NONE;
|
|
|
|
/*
|
|
* We need to sleep in these cases (by returning 1) until the Logout
|
|
* Response gets sent in the tx thread.
|
|
*/
|
|
if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) ||
|
|
((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) &&
|
|
be16_to_cpu(hdr->cid) == conn->cid))
|
|
logout_remove = 1;
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY)
|
|
iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
|
|
|
|
/*
|
|
* Immediate commands are executed, well, immediately.
|
|
* Non-Immediate Logout Commands are executed in CmdSN order.
|
|
*/
|
|
if (cmd->immediate_cmd) {
|
|
int ret = iscsit_execute_cmd(cmd, 0);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn);
|
|
if (cmdsn_ret == CMDSN_LOWER_THAN_EXP)
|
|
logout_remove = 0;
|
|
else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
|
|
return -1;
|
|
}
|
|
|
|
return logout_remove;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_handle_logout_cmd);
|
|
|
|
int iscsit_handle_snack(
|
|
struct iscsi_conn *conn,
|
|
unsigned char *buf)
|
|
{
|
|
struct iscsi_snack *hdr;
|
|
|
|
hdr = (struct iscsi_snack *) buf;
|
|
hdr->flags &= ~ISCSI_FLAG_CMD_FINAL;
|
|
|
|
pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
|
|
" 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
|
|
" CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags,
|
|
hdr->begrun, hdr->runlength, conn->cid);
|
|
|
|
if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
|
|
pr_err("Initiator sent SNACK request while in"
|
|
" ErrorRecoveryLevel=0.\n");
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
buf);
|
|
}
|
|
/*
|
|
* SNACK_DATA and SNACK_R2T are both 0, so check which function to
|
|
* call from inside iscsi_send_recovery_datain_or_r2t().
|
|
*/
|
|
switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) {
|
|
case 0:
|
|
return iscsit_handle_recovery_datain_or_r2t(conn, buf,
|
|
hdr->itt,
|
|
be32_to_cpu(hdr->ttt),
|
|
be32_to_cpu(hdr->begrun),
|
|
be32_to_cpu(hdr->runlength));
|
|
case ISCSI_FLAG_SNACK_TYPE_STATUS:
|
|
return iscsit_handle_status_snack(conn, hdr->itt,
|
|
be32_to_cpu(hdr->ttt),
|
|
be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength));
|
|
case ISCSI_FLAG_SNACK_TYPE_DATA_ACK:
|
|
return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt),
|
|
be32_to_cpu(hdr->begrun),
|
|
be32_to_cpu(hdr->runlength));
|
|
case ISCSI_FLAG_SNACK_TYPE_RDATA:
|
|
/* FIXME: Support R-Data SNACK */
|
|
pr_err("R-Data SNACK Not Supported.\n");
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
buf);
|
|
default:
|
|
pr_err("Unknown SNACK type 0x%02x, protocol"
|
|
" error.\n", hdr->flags & 0x0f);
|
|
return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
buf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_handle_snack);
|
|
|
|
static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn)
|
|
{
|
|
if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) ||
|
|
(conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) {
|
|
wait_for_completion_interruptible_timeout(
|
|
&conn->rx_half_close_comp,
|
|
ISCSI_RX_THREAD_TCP_TIMEOUT * HZ);
|
|
}
|
|
}
|
|
|
|
static int iscsit_handle_immediate_data(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_scsi_req *hdr,
|
|
u32 length)
|
|
{
|
|
int iov_ret, rx_got = 0, rx_size = 0;
|
|
u32 checksum, iov_count = 0, padding = 0;
|
|
struct iscsi_conn *conn = cmd->conn;
|
|
struct kvec *iov;
|
|
|
|
iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length);
|
|
if (iov_ret < 0)
|
|
return IMMEDIATE_DATA_CANNOT_RECOVER;
|
|
|
|
rx_size = length;
|
|
iov_count = iov_ret;
|
|
iov = &cmd->iov_data[0];
|
|
|
|
padding = ((-length) & 3);
|
|
if (padding != 0) {
|
|
iov[iov_count].iov_base = cmd->pad_bytes;
|
|
iov[iov_count++].iov_len = padding;
|
|
rx_size += padding;
|
|
}
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
iov[iov_count].iov_base = &checksum;
|
|
iov[iov_count++].iov_len = ISCSI_CRC_LEN;
|
|
rx_size += ISCSI_CRC_LEN;
|
|
}
|
|
|
|
rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size);
|
|
|
|
iscsit_unmap_iovec(cmd);
|
|
|
|
if (rx_got != rx_size) {
|
|
iscsit_rx_thread_wait_for_tcp(conn);
|
|
return IMMEDIATE_DATA_CANNOT_RECOVER;
|
|
}
|
|
|
|
if (conn->conn_ops->DataDigest) {
|
|
u32 data_crc;
|
|
|
|
data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd,
|
|
cmd->write_data_done, length, padding,
|
|
cmd->pad_bytes);
|
|
|
|
if (checksum != data_crc) {
|
|
pr_err("ImmediateData CRC32C DataDigest 0x%08x"
|
|
" does not match computed 0x%08x\n", checksum,
|
|
data_crc);
|
|
|
|
if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
|
|
pr_err("Unable to recover from"
|
|
" Immediate Data digest failure while"
|
|
" in ERL=0.\n");
|
|
iscsit_reject_cmd(cmd,
|
|
ISCSI_REASON_DATA_DIGEST_ERROR,
|
|
(unsigned char *)hdr);
|
|
return IMMEDIATE_DATA_CANNOT_RECOVER;
|
|
} else {
|
|
iscsit_reject_cmd(cmd,
|
|
ISCSI_REASON_DATA_DIGEST_ERROR,
|
|
(unsigned char *)hdr);
|
|
return IMMEDIATE_DATA_ERL1_CRC_FAILURE;
|
|
}
|
|
} else {
|
|
pr_debug("Got CRC32C DataDigest 0x%08x for"
|
|
" %u bytes of Immediate Data\n", checksum,
|
|
length);
|
|
}
|
|
}
|
|
|
|
cmd->write_data_done += length;
|
|
|
|
if (cmd->write_data_done == cmd->se_cmd.data_length) {
|
|
spin_lock_bh(&cmd->istate_lock);
|
|
cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
|
|
cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
|
|
spin_unlock_bh(&cmd->istate_lock);
|
|
}
|
|
|
|
return IMMEDIATE_DATA_NORMAL_OPERATION;
|
|
}
|
|
|
|
/*
|
|
* Called with sess->conn_lock held.
|
|
*/
|
|
/* #warning iscsi_build_conn_drop_async_message() only sends out on connections
|
|
with active network interface */
|
|
static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_cmd *cmd;
|
|
struct iscsi_conn *conn_p;
|
|
bool found = false;
|
|
|
|
/*
|
|
* Only send a Asynchronous Message on connections whos network
|
|
* interface is still functional.
|
|
*/
|
|
list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) {
|
|
if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) {
|
|
iscsit_inc_conn_usage_count(conn_p);
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
return;
|
|
|
|
cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING);
|
|
if (!cmd) {
|
|
iscsit_dec_conn_usage_count(conn_p);
|
|
return;
|
|
}
|
|
|
|
cmd->logout_cid = conn->cid;
|
|
cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
|
|
cmd->i_state = ISTATE_SEND_ASYNCMSG;
|
|
|
|
spin_lock_bh(&conn_p->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list);
|
|
spin_unlock_bh(&conn_p->cmd_lock);
|
|
|
|
iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state);
|
|
iscsit_dec_conn_usage_count(conn_p);
|
|
}
|
|
|
|
static int iscsit_send_conn_drop_async_message(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_async *hdr;
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
|
|
|
|
hdr = (struct iscsi_async *) cmd->pdu;
|
|
hdr->opcode = ISCSI_OP_ASYNC_EVENT;
|
|
hdr->flags = ISCSI_FLAG_CMD_FINAL;
|
|
cmd->init_task_tag = RESERVED_ITT;
|
|
cmd->targ_xfer_tag = 0xFFFFFFFF;
|
|
put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]);
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION;
|
|
hdr->param1 = cpu_to_be16(cmd->logout_cid);
|
|
hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait);
|
|
hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain);
|
|
|
|
pr_debug("Sending Connection Dropped Async Message StatSN:"
|
|
" 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn,
|
|
cmd->logout_cid, conn->cid);
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
|
|
}
|
|
|
|
static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn)
|
|
{
|
|
if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) ||
|
|
(conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) {
|
|
wait_for_completion_interruptible_timeout(
|
|
&conn->tx_half_close_comp,
|
|
ISCSI_TX_THREAD_TCP_TIMEOUT * HZ);
|
|
}
|
|
}
|
|
|
|
void
|
|
iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
struct iscsi_datain *datain, struct iscsi_data_rsp *hdr,
|
|
bool set_statsn)
|
|
{
|
|
hdr->opcode = ISCSI_OP_SCSI_DATA_IN;
|
|
hdr->flags = datain->flags;
|
|
if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
|
|
if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) {
|
|
hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW;
|
|
hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
|
|
} else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) {
|
|
hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW;
|
|
hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
|
|
}
|
|
}
|
|
hton24(hdr->dlength, datain->length);
|
|
if (hdr->flags & ISCSI_FLAG_DATA_ACK)
|
|
int_to_scsilun(cmd->se_cmd.orig_fe_lun,
|
|
(struct scsi_lun *)&hdr->lun);
|
|
else
|
|
put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun);
|
|
|
|
hdr->itt = cmd->init_task_tag;
|
|
|
|
if (hdr->flags & ISCSI_FLAG_DATA_ACK)
|
|
hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag);
|
|
else
|
|
hdr->ttt = cpu_to_be32(0xFFFFFFFF);
|
|
if (set_statsn)
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
else
|
|
hdr->statsn = cpu_to_be32(0xFFFFFFFF);
|
|
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
hdr->datasn = cpu_to_be32(datain->data_sn);
|
|
hdr->offset = cpu_to_be32(datain->offset);
|
|
|
|
pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
|
|
" DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
|
|
cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn),
|
|
ntohl(hdr->offset), datain->length, conn->cid);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_datain_pdu);
|
|
|
|
static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0];
|
|
struct iscsi_datain datain;
|
|
struct iscsi_datain_req *dr;
|
|
int eodr = 0, ret;
|
|
bool set_statsn = false;
|
|
|
|
memset(&datain, 0, sizeof(struct iscsi_datain));
|
|
dr = iscsit_get_datain_values(cmd, &datain);
|
|
if (!dr) {
|
|
pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
|
|
cmd->init_task_tag);
|
|
return -1;
|
|
}
|
|
/*
|
|
* Be paranoid and double check the logic for now.
|
|
*/
|
|
if ((datain.offset + datain.length) > cmd->se_cmd.data_length) {
|
|
pr_err("Command ITT: 0x%08x, datain.offset: %u and"
|
|
" datain.length: %u exceeds cmd->data_length: %u\n",
|
|
cmd->init_task_tag, datain.offset, datain.length,
|
|
cmd->se_cmd.data_length);
|
|
return -1;
|
|
}
|
|
|
|
atomic_long_add(datain.length, &conn->sess->tx_data_octets);
|
|
/*
|
|
* Special case for successfully execution w/ both DATAIN
|
|
* and Sense Data.
|
|
*/
|
|
if ((datain.flags & ISCSI_FLAG_DATA_STATUS) &&
|
|
(cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE))
|
|
datain.flags &= ~ISCSI_FLAG_DATA_STATUS;
|
|
else {
|
|
if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) ||
|
|
(dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) {
|
|
iscsit_increment_maxcmdsn(cmd, conn->sess);
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
set_statsn = true;
|
|
} else if (dr->dr_complete ==
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY)
|
|
set_statsn = true;
|
|
}
|
|
|
|
iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn);
|
|
|
|
ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, dr, &datain, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (dr->dr_complete) {
|
|
eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ?
|
|
2 : 1;
|
|
iscsit_free_datain_req(cmd, dr);
|
|
}
|
|
|
|
return eodr;
|
|
}
|
|
|
|
int
|
|
iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
struct iscsi_logout_rsp *hdr)
|
|
{
|
|
struct iscsi_conn *logout_conn = NULL;
|
|
struct iscsi_conn_recovery *cr = NULL;
|
|
struct iscsi_session *sess = conn->sess;
|
|
/*
|
|
* The actual shutting down of Sessions and/or Connections
|
|
* for CLOSESESSION and CLOSECONNECTION Logout Requests
|
|
* is done in scsi_logout_post_handler().
|
|
*/
|
|
switch (cmd->logout_reason) {
|
|
case ISCSI_LOGOUT_REASON_CLOSE_SESSION:
|
|
pr_debug("iSCSI session logout successful, setting"
|
|
" logout response to ISCSI_LOGOUT_SUCCESS.\n");
|
|
cmd->logout_response = ISCSI_LOGOUT_SUCCESS;
|
|
break;
|
|
case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
|
|
if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND)
|
|
break;
|
|
/*
|
|
* For CLOSECONNECTION logout requests carrying
|
|
* a matching logout CID -> local CID, the reference
|
|
* for the local CID will have been incremented in
|
|
* iscsi_logout_closeconnection().
|
|
*
|
|
* For CLOSECONNECTION logout requests carrying
|
|
* a different CID than the connection it arrived
|
|
* on, the connection responding to cmd->logout_cid
|
|
* is stopped in iscsit_logout_post_handler_diffcid().
|
|
*/
|
|
|
|
pr_debug("iSCSI CID: %hu logout on CID: %hu"
|
|
" successful.\n", cmd->logout_cid, conn->cid);
|
|
cmd->logout_response = ISCSI_LOGOUT_SUCCESS;
|
|
break;
|
|
case ISCSI_LOGOUT_REASON_RECOVERY:
|
|
if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) ||
|
|
(cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED))
|
|
break;
|
|
/*
|
|
* If the connection is still active from our point of view
|
|
* force connection recovery to occur.
|
|
*/
|
|
logout_conn = iscsit_get_conn_from_cid_rcfr(sess,
|
|
cmd->logout_cid);
|
|
if (logout_conn) {
|
|
iscsit_connection_reinstatement_rcfr(logout_conn);
|
|
iscsit_dec_conn_usage_count(logout_conn);
|
|
}
|
|
|
|
cr = iscsit_get_inactive_connection_recovery_entry(
|
|
conn->sess, cmd->logout_cid);
|
|
if (!cr) {
|
|
pr_err("Unable to locate CID: %hu for"
|
|
" REMOVECONNFORRECOVERY Logout Request.\n",
|
|
cmd->logout_cid);
|
|
cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND;
|
|
break;
|
|
}
|
|
|
|
iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn);
|
|
|
|
pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
|
|
" for recovery for CID: %hu on CID: %hu successful.\n",
|
|
cmd->logout_cid, conn->cid);
|
|
cmd->logout_response = ISCSI_LOGOUT_SUCCESS;
|
|
break;
|
|
default:
|
|
pr_err("Unknown cmd->logout_reason: 0x%02x\n",
|
|
cmd->logout_reason);
|
|
return -1;
|
|
}
|
|
|
|
hdr->opcode = ISCSI_OP_LOGOUT_RSP;
|
|
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
|
|
hdr->response = cmd->logout_response;
|
|
hdr->itt = cmd->init_task_tag;
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
|
|
iscsit_increment_maxcmdsn(cmd, conn->sess);
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
|
|
pr_debug("Built Logout Response ITT: 0x%08x StatSN:"
|
|
" 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
|
|
cmd->init_task_tag, cmd->stat_sn, hdr->response,
|
|
cmd->logout_cid, conn->cid);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_logout_rsp);
|
|
|
|
static int
|
|
iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
int rc;
|
|
|
|
rc = iscsit_build_logout_rsp(cmd, conn,
|
|
(struct iscsi_logout_rsp *)&cmd->pdu[0]);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
|
|
}
|
|
|
|
void
|
|
iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
struct iscsi_nopin *hdr, bool nopout_response)
|
|
{
|
|
hdr->opcode = ISCSI_OP_NOOP_IN;
|
|
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
|
|
hton24(hdr->dlength, cmd->buf_ptr_size);
|
|
if (nopout_response)
|
|
put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun);
|
|
hdr->itt = cmd->init_task_tag;
|
|
hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag);
|
|
cmd->stat_sn = (nopout_response) ? conn->stat_sn++ :
|
|
conn->stat_sn;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
|
|
if (nopout_response)
|
|
iscsit_increment_maxcmdsn(cmd, conn->sess);
|
|
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
|
|
pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x,"
|
|
" StatSN: 0x%08x, Length %u\n", (nopout_response) ?
|
|
"Solicited" : "Unsolicited", cmd->init_task_tag,
|
|
cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_nopin_rsp);
|
|
|
|
/*
|
|
* Unsolicited NOPIN, either requesting a response or not.
|
|
*/
|
|
static int iscsit_send_unsolicited_nopin(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn,
|
|
int want_response)
|
|
{
|
|
struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0];
|
|
int ret;
|
|
|
|
iscsit_build_nopin_rsp(cmd, conn, hdr, false);
|
|
|
|
pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
|
|
" 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid);
|
|
|
|
ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
spin_lock_bh(&cmd->istate_lock);
|
|
cmd->i_state = want_response ?
|
|
ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS;
|
|
spin_unlock_bh(&cmd->istate_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0];
|
|
|
|
iscsit_build_nopin_rsp(cmd, conn, hdr, true);
|
|
|
|
/*
|
|
* NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
|
|
* NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
|
|
*/
|
|
pr_debug("Echoing back %u bytes of ping data.\n", cmd->buf_ptr_size);
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL,
|
|
cmd->buf_ptr,
|
|
cmd->buf_ptr_size);
|
|
}
|
|
|
|
static int iscsit_send_r2t(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_r2t *r2t;
|
|
struct iscsi_r2t_rsp *hdr;
|
|
int ret;
|
|
|
|
r2t = iscsit_get_r2t_from_list(cmd);
|
|
if (!r2t)
|
|
return -1;
|
|
|
|
hdr = (struct iscsi_r2t_rsp *) cmd->pdu;
|
|
memset(hdr, 0, ISCSI_HDR_LEN);
|
|
hdr->opcode = ISCSI_OP_R2T;
|
|
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
|
|
int_to_scsilun(cmd->se_cmd.orig_fe_lun,
|
|
(struct scsi_lun *)&hdr->lun);
|
|
hdr->itt = cmd->init_task_tag;
|
|
if (conn->conn_transport->iscsit_get_r2t_ttt)
|
|
conn->conn_transport->iscsit_get_r2t_ttt(conn, cmd, r2t);
|
|
else
|
|
r2t->targ_xfer_tag = session_get_next_ttt(conn->sess);
|
|
hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag);
|
|
hdr->statsn = cpu_to_be32(conn->stat_sn);
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
hdr->r2tsn = cpu_to_be32(r2t->r2t_sn);
|
|
hdr->data_offset = cpu_to_be32(r2t->offset);
|
|
hdr->data_length = cpu_to_be32(r2t->xfer_len);
|
|
|
|
pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
|
|
" 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
|
|
(!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag,
|
|
r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn,
|
|
r2t->offset, r2t->xfer_len, conn->cid);
|
|
|
|
spin_lock_bh(&cmd->r2t_lock);
|
|
r2t->sent_r2t = 1;
|
|
spin_unlock_bh(&cmd->r2t_lock);
|
|
|
|
ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
spin_lock_bh(&cmd->dataout_timeout_lock);
|
|
iscsit_start_dataout_timer(cmd, conn);
|
|
spin_unlock_bh(&cmd->dataout_timeout_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* @recovery: If called from iscsi_task_reassign_complete_write() for
|
|
* connection recovery.
|
|
*/
|
|
int iscsit_build_r2ts_for_cmd(
|
|
struct iscsi_conn *conn,
|
|
struct iscsi_cmd *cmd,
|
|
bool recovery)
|
|
{
|
|
int first_r2t = 1;
|
|
u32 offset = 0, xfer_len = 0;
|
|
|
|
spin_lock_bh(&cmd->r2t_lock);
|
|
if (cmd->cmd_flags & ICF_SENT_LAST_R2T) {
|
|
spin_unlock_bh(&cmd->r2t_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (conn->sess->sess_ops->DataSequenceInOrder &&
|
|
!recovery)
|
|
cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done);
|
|
|
|
while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) {
|
|
if (conn->sess->sess_ops->DataSequenceInOrder) {
|
|
offset = cmd->r2t_offset;
|
|
|
|
if (first_r2t && recovery) {
|
|
int new_data_end = offset +
|
|
conn->sess->sess_ops->MaxBurstLength -
|
|
cmd->next_burst_len;
|
|
|
|
if (new_data_end > cmd->se_cmd.data_length)
|
|
xfer_len = cmd->se_cmd.data_length - offset;
|
|
else
|
|
xfer_len =
|
|
conn->sess->sess_ops->MaxBurstLength -
|
|
cmd->next_burst_len;
|
|
} else {
|
|
int new_data_end = offset +
|
|
conn->sess->sess_ops->MaxBurstLength;
|
|
|
|
if (new_data_end > cmd->se_cmd.data_length)
|
|
xfer_len = cmd->se_cmd.data_length - offset;
|
|
else
|
|
xfer_len = conn->sess->sess_ops->MaxBurstLength;
|
|
}
|
|
cmd->r2t_offset += xfer_len;
|
|
|
|
if (cmd->r2t_offset == cmd->se_cmd.data_length)
|
|
cmd->cmd_flags |= ICF_SENT_LAST_R2T;
|
|
} else {
|
|
struct iscsi_seq *seq;
|
|
|
|
seq = iscsit_get_seq_holder_for_r2t(cmd);
|
|
if (!seq) {
|
|
spin_unlock_bh(&cmd->r2t_lock);
|
|
return -1;
|
|
}
|
|
|
|
offset = seq->offset;
|
|
xfer_len = seq->xfer_len;
|
|
|
|
if (cmd->seq_send_order == cmd->seq_count)
|
|
cmd->cmd_flags |= ICF_SENT_LAST_R2T;
|
|
}
|
|
cmd->outstanding_r2ts++;
|
|
first_r2t = 0;
|
|
|
|
if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) {
|
|
spin_unlock_bh(&cmd->r2t_lock);
|
|
return -1;
|
|
}
|
|
|
|
if (cmd->cmd_flags & ICF_SENT_LAST_R2T)
|
|
break;
|
|
}
|
|
spin_unlock_bh(&cmd->r2t_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_r2ts_for_cmd);
|
|
|
|
void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
bool inc_stat_sn, struct iscsi_scsi_rsp *hdr)
|
|
{
|
|
if (inc_stat_sn)
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
|
|
atomic_long_inc(&conn->sess->rsp_pdus);
|
|
|
|
memset(hdr, 0, ISCSI_HDR_LEN);
|
|
hdr->opcode = ISCSI_OP_SCSI_CMD_RSP;
|
|
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
|
|
if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) {
|
|
hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW;
|
|
hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
|
|
} else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) {
|
|
hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
|
|
hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count);
|
|
}
|
|
hdr->response = cmd->iscsi_response;
|
|
hdr->cmd_status = cmd->se_cmd.scsi_status;
|
|
hdr->itt = cmd->init_task_tag;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
|
|
iscsit_increment_maxcmdsn(cmd, conn->sess);
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
|
|
pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
|
|
" Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
|
|
cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status,
|
|
cmd->se_cmd.scsi_status, conn->cid);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_rsp_pdu);
|
|
|
|
static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0];
|
|
bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS);
|
|
void *data_buf = NULL;
|
|
u32 padding = 0, data_buf_len = 0;
|
|
|
|
iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr);
|
|
|
|
/*
|
|
* Attach SENSE DATA payload to iSCSI Response PDU
|
|
*/
|
|
if (cmd->se_cmd.sense_buffer &&
|
|
((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ||
|
|
(cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
|
|
put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer);
|
|
cmd->se_cmd.scsi_sense_length += sizeof (__be16);
|
|
|
|
padding = -(cmd->se_cmd.scsi_sense_length) & 3;
|
|
hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length);
|
|
data_buf = cmd->sense_buffer;
|
|
data_buf_len = cmd->se_cmd.scsi_sense_length + padding;
|
|
|
|
if (padding) {
|
|
memset(cmd->sense_buffer +
|
|
cmd->se_cmd.scsi_sense_length, 0, padding);
|
|
pr_debug("Adding %u bytes of padding to"
|
|
" SENSE.\n", padding);
|
|
}
|
|
|
|
pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
|
|
" Response PDU\n",
|
|
cmd->se_cmd.scsi_sense_length);
|
|
}
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, data_buf,
|
|
data_buf_len);
|
|
}
|
|
|
|
static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr)
|
|
{
|
|
switch (se_tmr->response) {
|
|
case TMR_FUNCTION_COMPLETE:
|
|
return ISCSI_TMF_RSP_COMPLETE;
|
|
case TMR_TASK_DOES_NOT_EXIST:
|
|
return ISCSI_TMF_RSP_NO_TASK;
|
|
case TMR_LUN_DOES_NOT_EXIST:
|
|
return ISCSI_TMF_RSP_NO_LUN;
|
|
case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED:
|
|
return ISCSI_TMF_RSP_NOT_SUPPORTED;
|
|
case TMR_FUNCTION_REJECTED:
|
|
default:
|
|
return ISCSI_TMF_RSP_REJECTED;
|
|
}
|
|
}
|
|
|
|
void
|
|
iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
struct iscsi_tm_rsp *hdr)
|
|
{
|
|
struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req;
|
|
|
|
hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP;
|
|
hdr->flags = ISCSI_FLAG_CMD_FINAL;
|
|
hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr);
|
|
hdr->itt = cmd->init_task_tag;
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
|
|
iscsit_increment_maxcmdsn(cmd, conn->sess);
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
|
|
pr_debug("Built Task Management Response ITT: 0x%08x,"
|
|
" StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
|
|
cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_task_mgt_rsp);
|
|
|
|
static int
|
|
iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0];
|
|
|
|
iscsit_build_task_mgt_rsp(cmd, conn, hdr);
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
|
|
}
|
|
|
|
static bool iscsit_check_inaddr_any(struct iscsi_np *np)
|
|
{
|
|
bool ret = false;
|
|
|
|
if (np->np_sockaddr.ss_family == AF_INET6) {
|
|
const struct sockaddr_in6 sin6 = {
|
|
.sin6_addr = IN6ADDR_ANY_INIT };
|
|
struct sockaddr_in6 *sock_in6 =
|
|
(struct sockaddr_in6 *)&np->np_sockaddr;
|
|
|
|
if (!memcmp(sock_in6->sin6_addr.s6_addr,
|
|
sin6.sin6_addr.s6_addr, 16))
|
|
ret = true;
|
|
} else {
|
|
struct sockaddr_in * sock_in =
|
|
(struct sockaddr_in *)&np->np_sockaddr;
|
|
|
|
if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY))
|
|
ret = true;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define SENDTARGETS_BUF_LIMIT 32768U
|
|
|
|
static int
|
|
iscsit_build_sendtargets_response(struct iscsi_cmd *cmd,
|
|
enum iscsit_transport_type network_transport,
|
|
int skip_bytes, bool *completed)
|
|
{
|
|
char *payload = NULL;
|
|
struct iscsi_conn *conn = cmd->conn;
|
|
struct iscsi_portal_group *tpg;
|
|
struct iscsi_tiqn *tiqn;
|
|
struct iscsi_tpg_np *tpg_np;
|
|
int buffer_len, end_of_buf = 0, len = 0, payload_len = 0;
|
|
int target_name_printed;
|
|
unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */
|
|
unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL;
|
|
bool active;
|
|
|
|
buffer_len = min(conn->conn_ops->MaxRecvDataSegmentLength,
|
|
SENDTARGETS_BUF_LIMIT);
|
|
|
|
payload = kzalloc(buffer_len, GFP_KERNEL);
|
|
if (!payload) {
|
|
pr_err("Unable to allocate memory for sendtargets"
|
|
" response.\n");
|
|
return -ENOMEM;
|
|
}
|
|
/*
|
|
* Locate pointer to iqn./eui. string for ICF_SENDTARGETS_SINGLE
|
|
* explicit case..
|
|
*/
|
|
if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) {
|
|
text_ptr = strchr(text_in, '=');
|
|
if (!text_ptr) {
|
|
pr_err("Unable to locate '=' string in text_in:"
|
|
" %s\n", text_in);
|
|
kfree(payload);
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* Skip over '=' character..
|
|
*/
|
|
text_ptr += 1;
|
|
}
|
|
|
|
spin_lock(&tiqn_lock);
|
|
list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) {
|
|
if ((cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) &&
|
|
strcmp(tiqn->tiqn, text_ptr)) {
|
|
continue;
|
|
}
|
|
|
|
target_name_printed = 0;
|
|
|
|
spin_lock(&tiqn->tiqn_tpg_lock);
|
|
list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
|
|
|
|
/* If demo_mode_discovery=0 and generate_node_acls=0
|
|
* (demo mode dislabed) do not return
|
|
* TargetName+TargetAddress unless a NodeACL exists.
|
|
*/
|
|
|
|
if ((tpg->tpg_attrib.generate_node_acls == 0) &&
|
|
(tpg->tpg_attrib.demo_mode_discovery == 0) &&
|
|
(!target_tpg_has_node_acl(&tpg->tpg_se_tpg,
|
|
cmd->conn->sess->sess_ops->InitiatorName))) {
|
|
continue;
|
|
}
|
|
|
|
spin_lock(&tpg->tpg_state_lock);
|
|
active = (tpg->tpg_state == TPG_STATE_ACTIVE);
|
|
spin_unlock(&tpg->tpg_state_lock);
|
|
|
|
if (!active && tpg->tpg_attrib.tpg_enabled_sendtargets)
|
|
continue;
|
|
|
|
spin_lock(&tpg->tpg_np_lock);
|
|
list_for_each_entry(tpg_np, &tpg->tpg_gnp_list,
|
|
tpg_np_list) {
|
|
struct iscsi_np *np = tpg_np->tpg_np;
|
|
bool inaddr_any = iscsit_check_inaddr_any(np);
|
|
struct sockaddr_storage *sockaddr;
|
|
|
|
if (np->np_network_transport != network_transport)
|
|
continue;
|
|
|
|
if (!target_name_printed) {
|
|
len = sprintf(buf, "TargetName=%s",
|
|
tiqn->tiqn);
|
|
len += 1;
|
|
|
|
if ((len + payload_len) > buffer_len) {
|
|
spin_unlock(&tpg->tpg_np_lock);
|
|
spin_unlock(&tiqn->tiqn_tpg_lock);
|
|
end_of_buf = 1;
|
|
goto eob;
|
|
}
|
|
|
|
if (skip_bytes && len <= skip_bytes) {
|
|
skip_bytes -= len;
|
|
} else {
|
|
memcpy(payload + payload_len, buf, len);
|
|
payload_len += len;
|
|
target_name_printed = 1;
|
|
if (len > skip_bytes)
|
|
skip_bytes = 0;
|
|
}
|
|
}
|
|
|
|
if (inaddr_any)
|
|
sockaddr = &conn->local_sockaddr;
|
|
else
|
|
sockaddr = &np->np_sockaddr;
|
|
|
|
len = sprintf(buf, "TargetAddress="
|
|
"%pISpc,%hu",
|
|
sockaddr,
|
|
tpg->tpgt);
|
|
len += 1;
|
|
|
|
if ((len + payload_len) > buffer_len) {
|
|
spin_unlock(&tpg->tpg_np_lock);
|
|
spin_unlock(&tiqn->tiqn_tpg_lock);
|
|
end_of_buf = 1;
|
|
goto eob;
|
|
}
|
|
|
|
if (skip_bytes && len <= skip_bytes) {
|
|
skip_bytes -= len;
|
|
} else {
|
|
memcpy(payload + payload_len, buf, len);
|
|
payload_len += len;
|
|
if (len > skip_bytes)
|
|
skip_bytes = 0;
|
|
}
|
|
}
|
|
spin_unlock(&tpg->tpg_np_lock);
|
|
}
|
|
spin_unlock(&tiqn->tiqn_tpg_lock);
|
|
eob:
|
|
if (end_of_buf) {
|
|
*completed = false;
|
|
break;
|
|
}
|
|
|
|
if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE)
|
|
break;
|
|
}
|
|
spin_unlock(&tiqn_lock);
|
|
|
|
cmd->buf_ptr = payload;
|
|
|
|
return payload_len;
|
|
}
|
|
|
|
int
|
|
iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
struct iscsi_text_rsp *hdr,
|
|
enum iscsit_transport_type network_transport)
|
|
{
|
|
int text_length, padding;
|
|
bool completed = true;
|
|
|
|
text_length = iscsit_build_sendtargets_response(cmd, network_transport,
|
|
cmd->read_data_done,
|
|
&completed);
|
|
if (text_length < 0)
|
|
return text_length;
|
|
|
|
if (completed) {
|
|
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
|
|
} else {
|
|
hdr->flags |= ISCSI_FLAG_TEXT_CONTINUE;
|
|
cmd->read_data_done += text_length;
|
|
if (cmd->targ_xfer_tag == 0xFFFFFFFF)
|
|
cmd->targ_xfer_tag = session_get_next_ttt(conn->sess);
|
|
}
|
|
hdr->opcode = ISCSI_OP_TEXT_RSP;
|
|
padding = ((-text_length) & 3);
|
|
hton24(hdr->dlength, text_length);
|
|
hdr->itt = cmd->init_task_tag;
|
|
hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag);
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
|
|
iscsit_increment_maxcmdsn(cmd, conn->sess);
|
|
/*
|
|
* Reset maxcmdsn_inc in multi-part text payload exchanges to
|
|
* correctly increment MaxCmdSN for each response answering a
|
|
* non immediate text request with a valid CmdSN.
|
|
*/
|
|
cmd->maxcmdsn_inc = 0;
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
|
|
pr_debug("Built Text Response: ITT: 0x%08x, TTT: 0x%08x, StatSN: 0x%08x,"
|
|
" Length: %u, CID: %hu F: %d C: %d\n", cmd->init_task_tag,
|
|
cmd->targ_xfer_tag, cmd->stat_sn, text_length, conn->cid,
|
|
!!(hdr->flags & ISCSI_FLAG_CMD_FINAL),
|
|
!!(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE));
|
|
|
|
return text_length + padding;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_text_rsp);
|
|
|
|
static int iscsit_send_text_rsp(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu;
|
|
int text_length;
|
|
|
|
text_length = iscsit_build_text_rsp(cmd, conn, hdr,
|
|
conn->conn_transport->transport_type);
|
|
if (text_length < 0)
|
|
return text_length;
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL,
|
|
cmd->buf_ptr,
|
|
text_length);
|
|
}
|
|
|
|
void
|
|
iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
|
|
struct iscsi_reject *hdr)
|
|
{
|
|
hdr->opcode = ISCSI_OP_REJECT;
|
|
hdr->reason = cmd->reject_reason;
|
|
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
|
|
hton24(hdr->dlength, ISCSI_HDR_LEN);
|
|
hdr->ffffffff = cpu_to_be32(0xffffffff);
|
|
cmd->stat_sn = conn->stat_sn++;
|
|
hdr->statsn = cpu_to_be32(cmd->stat_sn);
|
|
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
|
|
hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
|
|
|
|
}
|
|
EXPORT_SYMBOL(iscsit_build_reject);
|
|
|
|
static int iscsit_send_reject(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0];
|
|
|
|
iscsit_build_reject(cmd, conn, hdr);
|
|
|
|
pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
|
|
" CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid);
|
|
|
|
return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL,
|
|
cmd->buf_ptr,
|
|
ISCSI_HDR_LEN);
|
|
}
|
|
|
|
void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
|
|
{
|
|
int ord, cpu;
|
|
/*
|
|
* bitmap_id is assigned from iscsit_global->ts_bitmap from
|
|
* within iscsit_start_kthreads()
|
|
*
|
|
* Here we use bitmap_id to determine which CPU that this
|
|
* iSCSI connection's RX/TX threads will be scheduled to
|
|
* execute upon.
|
|
*/
|
|
ord = conn->bitmap_id % cpumask_weight(cpu_online_mask);
|
|
for_each_online_cpu(cpu) {
|
|
if (ord-- == 0) {
|
|
cpumask_set_cpu(cpu, conn->conn_cpumask);
|
|
return;
|
|
}
|
|
}
|
|
/*
|
|
* This should never be reached..
|
|
*/
|
|
dump_stack();
|
|
cpumask_setall(conn->conn_cpumask);
|
|
}
|
|
|
|
int
|
|
iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
|
|
{
|
|
int ret;
|
|
|
|
switch (state) {
|
|
case ISTATE_SEND_R2T:
|
|
ret = iscsit_send_r2t(cmd, conn);
|
|
if (ret < 0)
|
|
goto err;
|
|
break;
|
|
case ISTATE_REMOVE:
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_del_init(&cmd->i_conn_node);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
iscsit_free_cmd(cmd, false);
|
|
break;
|
|
case ISTATE_SEND_NOPIN_WANT_RESPONSE:
|
|
iscsit_mod_nopin_response_timer(conn);
|
|
ret = iscsit_send_unsolicited_nopin(cmd, conn, 1);
|
|
if (ret < 0)
|
|
goto err;
|
|
break;
|
|
case ISTATE_SEND_NOPIN_NO_RESPONSE:
|
|
ret = iscsit_send_unsolicited_nopin(cmd, conn, 0);
|
|
if (ret < 0)
|
|
goto err;
|
|
break;
|
|
default:
|
|
pr_err("Unknown Opcode: 0x%02x ITT:"
|
|
" 0x%08x, i_state: %d on CID: %hu\n",
|
|
cmd->iscsi_opcode, cmd->init_task_tag, state,
|
|
conn->cid);
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return -1;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_immediate_queue);
|
|
|
|
static int
|
|
iscsit_handle_immediate_queue(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsit_transport *t = conn->conn_transport;
|
|
struct iscsi_queue_req *qr;
|
|
struct iscsi_cmd *cmd;
|
|
u8 state;
|
|
int ret;
|
|
|
|
while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) {
|
|
atomic_set(&conn->check_immediate_queue, 0);
|
|
cmd = qr->cmd;
|
|
state = qr->state;
|
|
kmem_cache_free(lio_qr_cache, qr);
|
|
|
|
ret = t->iscsit_immediate_queue(conn, cmd, state);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
|
|
{
|
|
int ret;
|
|
|
|
check_rsp_state:
|
|
switch (state) {
|
|
case ISTATE_SEND_DATAIN:
|
|
ret = iscsit_send_datain(cmd, conn);
|
|
if (ret < 0)
|
|
goto err;
|
|
else if (!ret)
|
|
/* more drs */
|
|
goto check_rsp_state;
|
|
else if (ret == 1) {
|
|
/* all done */
|
|
spin_lock_bh(&cmd->istate_lock);
|
|
cmd->i_state = ISTATE_SENT_STATUS;
|
|
spin_unlock_bh(&cmd->istate_lock);
|
|
|
|
if (atomic_read(&conn->check_immediate_queue))
|
|
return 1;
|
|
|
|
return 0;
|
|
} else if (ret == 2) {
|
|
/* Still must send status,
|
|
SCF_TRANSPORT_TASK_SENSE was set */
|
|
spin_lock_bh(&cmd->istate_lock);
|
|
cmd->i_state = ISTATE_SEND_STATUS;
|
|
spin_unlock_bh(&cmd->istate_lock);
|
|
state = ISTATE_SEND_STATUS;
|
|
goto check_rsp_state;
|
|
}
|
|
|
|
break;
|
|
case ISTATE_SEND_STATUS:
|
|
case ISTATE_SEND_STATUS_RECOVERY:
|
|
ret = iscsit_send_response(cmd, conn);
|
|
break;
|
|
case ISTATE_SEND_LOGOUTRSP:
|
|
ret = iscsit_send_logout(cmd, conn);
|
|
break;
|
|
case ISTATE_SEND_ASYNCMSG:
|
|
ret = iscsit_send_conn_drop_async_message(
|
|
cmd, conn);
|
|
break;
|
|
case ISTATE_SEND_NOPIN:
|
|
ret = iscsit_send_nopin(cmd, conn);
|
|
break;
|
|
case ISTATE_SEND_REJECT:
|
|
ret = iscsit_send_reject(cmd, conn);
|
|
break;
|
|
case ISTATE_SEND_TASKMGTRSP:
|
|
ret = iscsit_send_task_mgt_rsp(cmd, conn);
|
|
if (ret != 0)
|
|
break;
|
|
ret = iscsit_tmr_post_handler(cmd, conn);
|
|
if (ret != 0)
|
|
iscsit_fall_back_to_erl0(conn->sess);
|
|
break;
|
|
case ISTATE_SEND_TEXTRSP:
|
|
ret = iscsit_send_text_rsp(cmd, conn);
|
|
break;
|
|
default:
|
|
pr_err("Unknown Opcode: 0x%02x ITT:"
|
|
" 0x%08x, i_state: %d on CID: %hu\n",
|
|
cmd->iscsi_opcode, cmd->init_task_tag,
|
|
state, conn->cid);
|
|
goto err;
|
|
}
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
switch (state) {
|
|
case ISTATE_SEND_LOGOUTRSP:
|
|
if (!iscsit_logout_post_handler(cmd, conn))
|
|
return -ECONNRESET;
|
|
/* fall through */
|
|
case ISTATE_SEND_STATUS:
|
|
case ISTATE_SEND_ASYNCMSG:
|
|
case ISTATE_SEND_NOPIN:
|
|
case ISTATE_SEND_STATUS_RECOVERY:
|
|
case ISTATE_SEND_TEXTRSP:
|
|
case ISTATE_SEND_TASKMGTRSP:
|
|
case ISTATE_SEND_REJECT:
|
|
spin_lock_bh(&cmd->istate_lock);
|
|
cmd->i_state = ISTATE_SENT_STATUS;
|
|
spin_unlock_bh(&cmd->istate_lock);
|
|
break;
|
|
default:
|
|
pr_err("Unknown Opcode: 0x%02x ITT:"
|
|
" 0x%08x, i_state: %d on CID: %hu\n",
|
|
cmd->iscsi_opcode, cmd->init_task_tag,
|
|
cmd->i_state, conn->cid);
|
|
goto err;
|
|
}
|
|
|
|
if (atomic_read(&conn->check_immediate_queue))
|
|
return 1;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return -1;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_response_queue);
|
|
|
|
static int iscsit_handle_response_queue(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsit_transport *t = conn->conn_transport;
|
|
struct iscsi_queue_req *qr;
|
|
struct iscsi_cmd *cmd;
|
|
u8 state;
|
|
int ret;
|
|
|
|
while ((qr = iscsit_get_cmd_from_response_queue(conn))) {
|
|
cmd = qr->cmd;
|
|
state = qr->state;
|
|
kmem_cache_free(lio_qr_cache, qr);
|
|
|
|
ret = t->iscsit_response_queue(conn, cmd, state);
|
|
if (ret == 1 || ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iscsi_target_tx_thread(void *arg)
|
|
{
|
|
int ret = 0;
|
|
struct iscsi_conn *conn = arg;
|
|
/*
|
|
* Allow ourselves to be interrupted by SIGINT so that a
|
|
* connection recovery / failure event can be triggered externally.
|
|
*/
|
|
allow_signal(SIGINT);
|
|
|
|
while (!kthread_should_stop()) {
|
|
/*
|
|
* Ensure that both TX and RX per connection kthreads
|
|
* are scheduled to run on the same CPU.
|
|
*/
|
|
iscsit_thread_check_cpumask(conn, current, 1);
|
|
|
|
wait_event_interruptible(conn->queues_wq,
|
|
!iscsit_conn_all_queues_empty(conn));
|
|
|
|
if (signal_pending(current))
|
|
goto transport_err;
|
|
|
|
get_immediate:
|
|
ret = iscsit_handle_immediate_queue(conn);
|
|
if (ret < 0)
|
|
goto transport_err;
|
|
|
|
ret = iscsit_handle_response_queue(conn);
|
|
if (ret == 1)
|
|
goto get_immediate;
|
|
else if (ret == -ECONNRESET)
|
|
goto out;
|
|
else if (ret < 0)
|
|
goto transport_err;
|
|
}
|
|
|
|
transport_err:
|
|
/*
|
|
* Avoid the normal connection failure code-path if this connection
|
|
* is still within LOGIN mode, and iscsi_np process context is
|
|
* responsible for cleaning up the early connection failure.
|
|
*/
|
|
if (conn->conn_state != TARG_CONN_STATE_IN_LOGIN)
|
|
iscsit_take_action_for_connection_exit(conn);
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf)
|
|
{
|
|
struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf;
|
|
struct iscsi_cmd *cmd;
|
|
int ret = 0;
|
|
|
|
switch (hdr->opcode & ISCSI_OPCODE_MASK) {
|
|
case ISCSI_OP_SCSI_CMD:
|
|
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
|
|
if (!cmd)
|
|
goto reject;
|
|
|
|
ret = iscsit_handle_scsi_cmd(conn, cmd, buf);
|
|
break;
|
|
case ISCSI_OP_SCSI_DATA_OUT:
|
|
ret = iscsit_handle_data_out(conn, buf);
|
|
break;
|
|
case ISCSI_OP_NOOP_OUT:
|
|
cmd = NULL;
|
|
if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) {
|
|
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
|
|
if (!cmd)
|
|
goto reject;
|
|
}
|
|
ret = iscsit_handle_nop_out(conn, cmd, buf);
|
|
break;
|
|
case ISCSI_OP_SCSI_TMFUNC:
|
|
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
|
|
if (!cmd)
|
|
goto reject;
|
|
|
|
ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf);
|
|
break;
|
|
case ISCSI_OP_TEXT:
|
|
if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) {
|
|
cmd = iscsit_find_cmd_from_itt(conn, hdr->itt);
|
|
if (!cmd)
|
|
goto reject;
|
|
} else {
|
|
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
|
|
if (!cmd)
|
|
goto reject;
|
|
}
|
|
|
|
ret = iscsit_handle_text_cmd(conn, cmd, buf);
|
|
break;
|
|
case ISCSI_OP_LOGOUT:
|
|
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
|
|
if (!cmd)
|
|
goto reject;
|
|
|
|
ret = iscsit_handle_logout_cmd(conn, cmd, buf);
|
|
if (ret > 0)
|
|
wait_for_completion_timeout(&conn->conn_logout_comp,
|
|
SECONDS_FOR_LOGOUT_COMP * HZ);
|
|
break;
|
|
case ISCSI_OP_SNACK:
|
|
ret = iscsit_handle_snack(conn, buf);
|
|
break;
|
|
default:
|
|
pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode);
|
|
if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
|
|
pr_err("Cannot recover from unknown"
|
|
" opcode while ERL=0, closing iSCSI connection.\n");
|
|
return -1;
|
|
}
|
|
pr_err("Unable to recover from unknown opcode while OFMarker=No,"
|
|
" closing iSCSI connection.\n");
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
reject:
|
|
return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
|
|
}
|
|
|
|
static bool iscsi_target_check_conn_state(struct iscsi_conn *conn)
|
|
{
|
|
bool ret;
|
|
|
|
spin_lock_bh(&conn->state_lock);
|
|
ret = (conn->conn_state != TARG_CONN_STATE_LOGGED_IN);
|
|
spin_unlock_bh(&conn->state_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void iscsit_get_rx_pdu(struct iscsi_conn *conn)
|
|
{
|
|
int ret;
|
|
u8 buffer[ISCSI_HDR_LEN], opcode;
|
|
u32 checksum = 0, digest = 0;
|
|
struct kvec iov;
|
|
|
|
while (!kthread_should_stop()) {
|
|
/*
|
|
* Ensure that both TX and RX per connection kthreads
|
|
* are scheduled to run on the same CPU.
|
|
*/
|
|
iscsit_thread_check_cpumask(conn, current, 0);
|
|
|
|
memset(buffer, 0, ISCSI_HDR_LEN);
|
|
memset(&iov, 0, sizeof(struct kvec));
|
|
|
|
iov.iov_base = buffer;
|
|
iov.iov_len = ISCSI_HDR_LEN;
|
|
|
|
ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN);
|
|
if (ret != ISCSI_HDR_LEN) {
|
|
iscsit_rx_thread_wait_for_tcp(conn);
|
|
return;
|
|
}
|
|
|
|
if (conn->conn_ops->HeaderDigest) {
|
|
iov.iov_base = &digest;
|
|
iov.iov_len = ISCSI_CRC_LEN;
|
|
|
|
ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN);
|
|
if (ret != ISCSI_CRC_LEN) {
|
|
iscsit_rx_thread_wait_for_tcp(conn);
|
|
return;
|
|
}
|
|
|
|
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
|
|
buffer, ISCSI_HDR_LEN,
|
|
0, NULL, (u8 *)&checksum);
|
|
|
|
if (digest != checksum) {
|
|
pr_err("HeaderDigest CRC32C failed,"
|
|
" received 0x%08x, computed 0x%08x\n",
|
|
digest, checksum);
|
|
/*
|
|
* Set the PDU to 0xff so it will intentionally
|
|
* hit default in the switch below.
|
|
*/
|
|
memset(buffer, 0xff, ISCSI_HDR_LEN);
|
|
atomic_long_inc(&conn->sess->conn_digest_errors);
|
|
} else {
|
|
pr_debug("Got HeaderDigest CRC32C"
|
|
" 0x%08x\n", checksum);
|
|
}
|
|
}
|
|
|
|
if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)
|
|
return;
|
|
|
|
opcode = buffer[0] & ISCSI_OPCODE_MASK;
|
|
|
|
if (conn->sess->sess_ops->SessionType &&
|
|
((!(opcode & ISCSI_OP_TEXT)) ||
|
|
(!(opcode & ISCSI_OP_LOGOUT)))) {
|
|
pr_err("Received illegal iSCSI Opcode: 0x%02x"
|
|
" while in Discovery Session, rejecting.\n", opcode);
|
|
iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
|
|
buffer);
|
|
return;
|
|
}
|
|
|
|
ret = iscsi_target_rx_opcode(conn, buffer);
|
|
if (ret < 0)
|
|
return;
|
|
}
|
|
}
|
|
|
|
int iscsi_target_rx_thread(void *arg)
|
|
{
|
|
int rc;
|
|
struct iscsi_conn *conn = arg;
|
|
|
|
/*
|
|
* Allow ourselves to be interrupted by SIGINT so that a
|
|
* connection recovery / failure event can be triggered externally.
|
|
*/
|
|
allow_signal(SIGINT);
|
|
/*
|
|
* Wait for iscsi_post_login_handler() to complete before allowing
|
|
* incoming iscsi/tcp socket I/O, and/or failing the connection.
|
|
*/
|
|
rc = wait_for_completion_interruptible(&conn->rx_login_comp);
|
|
if (rc < 0 || iscsi_target_check_conn_state(conn))
|
|
return 0;
|
|
|
|
if (!conn->conn_transport->iscsit_get_rx_pdu)
|
|
return 0;
|
|
|
|
conn->conn_transport->iscsit_get_rx_pdu(conn);
|
|
|
|
if (!signal_pending(current))
|
|
atomic_set(&conn->transport_failed, 1);
|
|
iscsit_take_action_for_connection_exit(conn);
|
|
return 0;
|
|
}
|
|
|
|
static void iscsit_release_commands_from_conn(struct iscsi_conn *conn)
|
|
{
|
|
LIST_HEAD(tmp_list);
|
|
struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL;
|
|
struct iscsi_session *sess = conn->sess;
|
|
/*
|
|
* We expect this function to only ever be called from either RX or TX
|
|
* thread context via iscsit_close_connection() once the other context
|
|
* has been reset -> returned sleeping pre-handler state.
|
|
*/
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_splice_init(&conn->conn_cmd_list, &tmp_list);
|
|
|
|
list_for_each_entry(cmd, &tmp_list, i_conn_node) {
|
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
|
|
|
if (se_cmd->se_tfo != NULL) {
|
|
spin_lock(&se_cmd->t_state_lock);
|
|
se_cmd->transport_state |= CMD_T_FABRIC_STOP;
|
|
spin_unlock(&se_cmd->t_state_lock);
|
|
}
|
|
}
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
list_for_each_entry_safe(cmd, cmd_tmp, &tmp_list, i_conn_node) {
|
|
list_del_init(&cmd->i_conn_node);
|
|
|
|
iscsit_increment_maxcmdsn(cmd, sess);
|
|
iscsit_free_cmd(cmd, true);
|
|
|
|
}
|
|
}
|
|
|
|
static void iscsit_stop_timers_for_cmds(
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_cmd *cmd;
|
|
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
|
|
if (cmd->data_direction == DMA_TO_DEVICE)
|
|
iscsit_stop_dataout_timer(cmd);
|
|
}
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
}
|
|
|
|
int iscsit_close_connection(
|
|
struct iscsi_conn *conn)
|
|
{
|
|
int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT);
|
|
struct iscsi_session *sess = conn->sess;
|
|
|
|
pr_debug("Closing iSCSI connection CID %hu on SID:"
|
|
" %u\n", conn->cid, sess->sid);
|
|
/*
|
|
* Always up conn_logout_comp for the traditional TCP and HW_OFFLOAD
|
|
* case just in case the RX Thread in iscsi_target_rx_opcode() is
|
|
* sleeping and the logout response never got sent because the
|
|
* connection failed.
|
|
*
|
|
* However for iser-target, isert_wait4logout() is using conn_logout_comp
|
|
* to signal logout response TX interrupt completion. Go ahead and skip
|
|
* this for iser since isert_rx_opcode() does not wait on logout failure,
|
|
* and to avoid iscsi_conn pointer dereference in iser-target code.
|
|
*/
|
|
if (!conn->conn_transport->rdma_shutdown)
|
|
complete(&conn->conn_logout_comp);
|
|
|
|
if (!strcmp(current->comm, ISCSI_RX_THREAD_NAME)) {
|
|
if (conn->tx_thread &&
|
|
cmpxchg(&conn->tx_thread_active, true, false)) {
|
|
send_sig(SIGINT, conn->tx_thread, 1);
|
|
kthread_stop(conn->tx_thread);
|
|
}
|
|
} else if (!strcmp(current->comm, ISCSI_TX_THREAD_NAME)) {
|
|
if (conn->rx_thread &&
|
|
cmpxchg(&conn->rx_thread_active, true, false)) {
|
|
send_sig(SIGINT, conn->rx_thread, 1);
|
|
kthread_stop(conn->rx_thread);
|
|
}
|
|
}
|
|
|
|
spin_lock(&iscsit_global->ts_bitmap_lock);
|
|
bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id,
|
|
get_order(1));
|
|
spin_unlock(&iscsit_global->ts_bitmap_lock);
|
|
|
|
iscsit_stop_timers_for_cmds(conn);
|
|
iscsit_stop_nopin_response_timer(conn);
|
|
iscsit_stop_nopin_timer(conn);
|
|
|
|
if (conn->conn_transport->iscsit_wait_conn)
|
|
conn->conn_transport->iscsit_wait_conn(conn);
|
|
|
|
/*
|
|
* During Connection recovery drop unacknowledged out of order
|
|
* commands for this connection, and prepare the other commands
|
|
* for reallegiance.
|
|
*
|
|
* During normal operation clear the out of order commands (but
|
|
* do not free the struct iscsi_ooo_cmdsn's) and release all
|
|
* struct iscsi_cmds.
|
|
*/
|
|
if (atomic_read(&conn->connection_recovery)) {
|
|
iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn);
|
|
iscsit_prepare_cmds_for_reallegiance(conn);
|
|
} else {
|
|
iscsit_clear_ooo_cmdsns_for_conn(conn);
|
|
iscsit_release_commands_from_conn(conn);
|
|
}
|
|
iscsit_free_queue_reqs_for_conn(conn);
|
|
|
|
/*
|
|
* Handle decrementing session or connection usage count if
|
|
* a logout response was not able to be sent because the
|
|
* connection failed. Fall back to Session Recovery here.
|
|
*/
|
|
if (atomic_read(&conn->conn_logout_remove)) {
|
|
if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) {
|
|
iscsit_dec_conn_usage_count(conn);
|
|
iscsit_dec_session_usage_count(sess);
|
|
}
|
|
if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION)
|
|
iscsit_dec_conn_usage_count(conn);
|
|
|
|
atomic_set(&conn->conn_logout_remove, 0);
|
|
atomic_set(&sess->session_reinstatement, 0);
|
|
atomic_set(&sess->session_fall_back_to_erl0, 1);
|
|
}
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_del(&conn->conn_list);
|
|
|
|
/*
|
|
* Attempt to let the Initiator know this connection failed by
|
|
* sending an Connection Dropped Async Message on another
|
|
* active connection.
|
|
*/
|
|
if (atomic_read(&conn->connection_recovery))
|
|
iscsit_build_conn_drop_async_message(conn);
|
|
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
/*
|
|
* If connection reinstatement is being performed on this connection,
|
|
* up the connection reinstatement semaphore that is being blocked on
|
|
* in iscsit_cause_connection_reinstatement().
|
|
*/
|
|
spin_lock_bh(&conn->state_lock);
|
|
if (atomic_read(&conn->sleep_on_conn_wait_comp)) {
|
|
spin_unlock_bh(&conn->state_lock);
|
|
complete(&conn->conn_wait_comp);
|
|
wait_for_completion(&conn->conn_post_wait_comp);
|
|
spin_lock_bh(&conn->state_lock);
|
|
}
|
|
|
|
/*
|
|
* If connection reinstatement is being performed on this connection
|
|
* by receiving a REMOVECONNFORRECOVERY logout request, up the
|
|
* connection wait rcfr semaphore that is being blocked on
|
|
* an iscsit_connection_reinstatement_rcfr().
|
|
*/
|
|
if (atomic_read(&conn->connection_wait_rcfr)) {
|
|
spin_unlock_bh(&conn->state_lock);
|
|
complete(&conn->conn_wait_rcfr_comp);
|
|
wait_for_completion(&conn->conn_post_wait_comp);
|
|
spin_lock_bh(&conn->state_lock);
|
|
}
|
|
atomic_set(&conn->connection_reinstatement, 1);
|
|
spin_unlock_bh(&conn->state_lock);
|
|
|
|
/*
|
|
* If any other processes are accessing this connection pointer we
|
|
* must wait until they have completed.
|
|
*/
|
|
iscsit_check_conn_usage_count(conn);
|
|
|
|
ahash_request_free(conn->conn_tx_hash);
|
|
if (conn->conn_rx_hash) {
|
|
struct crypto_ahash *tfm;
|
|
|
|
tfm = crypto_ahash_reqtfm(conn->conn_rx_hash);
|
|
ahash_request_free(conn->conn_rx_hash);
|
|
crypto_free_ahash(tfm);
|
|
}
|
|
|
|
free_cpumask_var(conn->conn_cpumask);
|
|
|
|
kfree(conn->conn_ops);
|
|
conn->conn_ops = NULL;
|
|
|
|
if (conn->sock)
|
|
sock_release(conn->sock);
|
|
|
|
if (conn->conn_transport->iscsit_free_conn)
|
|
conn->conn_transport->iscsit_free_conn(conn);
|
|
|
|
iscsit_put_transport(conn->conn_transport);
|
|
|
|
pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
|
|
conn->conn_state = TARG_CONN_STATE_FREE;
|
|
kfree(conn);
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
atomic_dec(&sess->nconn);
|
|
pr_debug("Decremented iSCSI connection count to %hu from node:"
|
|
" %s\n", atomic_read(&sess->nconn),
|
|
sess->sess_ops->InitiatorName);
|
|
/*
|
|
* Make sure that if one connection fails in an non ERL=2 iSCSI
|
|
* Session that they all fail.
|
|
*/
|
|
if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout &&
|
|
!atomic_read(&sess->session_logout))
|
|
atomic_set(&sess->session_fall_back_to_erl0, 1);
|
|
|
|
/*
|
|
* If this was not the last connection in the session, and we are
|
|
* performing session reinstatement or falling back to ERL=0, call
|
|
* iscsit_stop_session() without sleeping to shutdown the other
|
|
* active connections.
|
|
*/
|
|
if (atomic_read(&sess->nconn)) {
|
|
if (!atomic_read(&sess->session_reinstatement) &&
|
|
!atomic_read(&sess->session_fall_back_to_erl0)) {
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
return 0;
|
|
}
|
|
if (!atomic_read(&sess->session_stop_active)) {
|
|
atomic_set(&sess->session_stop_active, 1);
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
iscsit_stop_session(sess, 0, 0);
|
|
return 0;
|
|
}
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If this was the last connection in the session and one of the
|
|
* following is occurring:
|
|
*
|
|
* Session Reinstatement is not being performed, and are falling back
|
|
* to ERL=0 call iscsit_close_session().
|
|
*
|
|
* Session Logout was requested. iscsit_close_session() will be called
|
|
* elsewhere.
|
|
*
|
|
* Session Continuation is not being performed, start the Time2Retain
|
|
* handler and check if sleep_on_sess_wait_sem is active.
|
|
*/
|
|
if (!atomic_read(&sess->session_reinstatement) &&
|
|
atomic_read(&sess->session_fall_back_to_erl0)) {
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
iscsit_close_session(sess);
|
|
|
|
return 0;
|
|
} else if (atomic_read(&sess->session_logout)) {
|
|
pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
|
|
sess->session_state = TARG_SESS_STATE_FREE;
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
if (atomic_read(&sess->sleep_on_sess_wait_comp))
|
|
complete(&sess->session_wait_comp);
|
|
|
|
return 0;
|
|
} else {
|
|
pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
|
|
sess->session_state = TARG_SESS_STATE_FAILED;
|
|
|
|
if (!atomic_read(&sess->session_continuation)) {
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
iscsit_start_time2retain_handler(sess);
|
|
} else
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
if (atomic_read(&sess->sleep_on_sess_wait_comp))
|
|
complete(&sess->session_wait_comp);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the iSCSI Session for the iSCSI Initiator Node exists,
|
|
* forcefully shutdown the iSCSI NEXUS.
|
|
*/
|
|
int iscsit_close_session(struct iscsi_session *sess)
|
|
{
|
|
struct iscsi_portal_group *tpg = sess->tpg;
|
|
struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
|
|
|
|
if (atomic_read(&sess->nconn)) {
|
|
pr_err("%d connection(s) still exist for iSCSI session"
|
|
" to %s\n", atomic_read(&sess->nconn),
|
|
sess->sess_ops->InitiatorName);
|
|
BUG();
|
|
}
|
|
|
|
spin_lock_bh(&se_tpg->session_lock);
|
|
atomic_set(&sess->session_logout, 1);
|
|
atomic_set(&sess->session_reinstatement, 1);
|
|
iscsit_stop_time2retain_timer(sess);
|
|
spin_unlock_bh(&se_tpg->session_lock);
|
|
|
|
/*
|
|
* transport_deregister_session_configfs() will clear the
|
|
* struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
|
|
* can be setting it again with __transport_register_session() in
|
|
* iscsi_post_login_handler() again after the iscsit_stop_session()
|
|
* completes in iscsi_np context.
|
|
*/
|
|
transport_deregister_session_configfs(sess->se_sess);
|
|
|
|
/*
|
|
* If any other processes are accessing this session pointer we must
|
|
* wait until they have completed. If we are in an interrupt (the
|
|
* time2retain handler) and contain and active session usage count we
|
|
* restart the timer and exit.
|
|
*/
|
|
if (!in_interrupt()) {
|
|
if (iscsit_check_session_usage_count(sess) == 1)
|
|
iscsit_stop_session(sess, 1, 1);
|
|
} else {
|
|
if (iscsit_check_session_usage_count(sess) == 2) {
|
|
atomic_set(&sess->session_logout, 0);
|
|
iscsit_start_time2retain_handler(sess);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
transport_deregister_session(sess->se_sess);
|
|
|
|
if (sess->sess_ops->ErrorRecoveryLevel == 2)
|
|
iscsit_free_connection_recovery_entires(sess);
|
|
|
|
iscsit_free_all_ooo_cmdsns(sess);
|
|
|
|
spin_lock_bh(&se_tpg->session_lock);
|
|
pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
|
|
sess->session_state = TARG_SESS_STATE_FREE;
|
|
pr_debug("Released iSCSI session from node: %s\n",
|
|
sess->sess_ops->InitiatorName);
|
|
tpg->nsessions--;
|
|
if (tpg->tpg_tiqn)
|
|
tpg->tpg_tiqn->tiqn_nsessions--;
|
|
|
|
pr_debug("Decremented number of active iSCSI Sessions on"
|
|
" iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions);
|
|
|
|
spin_lock(&sess_idr_lock);
|
|
idr_remove(&sess_idr, sess->session_index);
|
|
spin_unlock(&sess_idr_lock);
|
|
|
|
kfree(sess->sess_ops);
|
|
sess->sess_ops = NULL;
|
|
spin_unlock_bh(&se_tpg->session_lock);
|
|
|
|
kfree(sess);
|
|
return 0;
|
|
}
|
|
|
|
static void iscsit_logout_post_handler_closesession(
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_session *sess = conn->sess;
|
|
int sleep = 1;
|
|
/*
|
|
* Traditional iscsi/tcp will invoke this logic from TX thread
|
|
* context during session logout, so clear tx_thread_active and
|
|
* sleep if iscsit_close_connection() has not already occured.
|
|
*
|
|
* Since iser-target invokes this logic from it's own workqueue,
|
|
* always sleep waiting for RX/TX thread shutdown to complete
|
|
* within iscsit_close_connection().
|
|
*/
|
|
if (!conn->conn_transport->rdma_shutdown)
|
|
sleep = cmpxchg(&conn->tx_thread_active, true, false);
|
|
|
|
atomic_set(&conn->conn_logout_remove, 0);
|
|
complete(&conn->conn_logout_comp);
|
|
|
|
iscsit_dec_conn_usage_count(conn);
|
|
iscsit_stop_session(sess, sleep, sleep);
|
|
iscsit_dec_session_usage_count(sess);
|
|
iscsit_close_session(sess);
|
|
}
|
|
|
|
static void iscsit_logout_post_handler_samecid(
|
|
struct iscsi_conn *conn)
|
|
{
|
|
int sleep = 1;
|
|
|
|
if (!conn->conn_transport->rdma_shutdown)
|
|
sleep = cmpxchg(&conn->tx_thread_active, true, false);
|
|
|
|
atomic_set(&conn->conn_logout_remove, 0);
|
|
complete(&conn->conn_logout_comp);
|
|
|
|
iscsit_cause_connection_reinstatement(conn, sleep);
|
|
iscsit_dec_conn_usage_count(conn);
|
|
}
|
|
|
|
static void iscsit_logout_post_handler_diffcid(
|
|
struct iscsi_conn *conn,
|
|
u16 cid)
|
|
{
|
|
struct iscsi_conn *l_conn;
|
|
struct iscsi_session *sess = conn->sess;
|
|
bool conn_found = false;
|
|
|
|
if (!sess)
|
|
return;
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) {
|
|
if (l_conn->cid == cid) {
|
|
iscsit_inc_conn_usage_count(l_conn);
|
|
conn_found = true;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
if (!conn_found)
|
|
return;
|
|
|
|
if (l_conn->sock)
|
|
l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN);
|
|
|
|
spin_lock_bh(&l_conn->state_lock);
|
|
pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
|
|
l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT;
|
|
spin_unlock_bh(&l_conn->state_lock);
|
|
|
|
iscsit_cause_connection_reinstatement(l_conn, 1);
|
|
iscsit_dec_conn_usage_count(l_conn);
|
|
}
|
|
|
|
/*
|
|
* Return of 0 causes the TX thread to restart.
|
|
*/
|
|
int iscsit_logout_post_handler(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (cmd->logout_reason) {
|
|
case ISCSI_LOGOUT_REASON_CLOSE_SESSION:
|
|
switch (cmd->logout_response) {
|
|
case ISCSI_LOGOUT_SUCCESS:
|
|
case ISCSI_LOGOUT_CLEANUP_FAILED:
|
|
default:
|
|
iscsit_logout_post_handler_closesession(conn);
|
|
break;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
|
|
if (conn->cid == cmd->logout_cid) {
|
|
switch (cmd->logout_response) {
|
|
case ISCSI_LOGOUT_SUCCESS:
|
|
case ISCSI_LOGOUT_CLEANUP_FAILED:
|
|
default:
|
|
iscsit_logout_post_handler_samecid(conn);
|
|
break;
|
|
}
|
|
ret = 0;
|
|
} else {
|
|
switch (cmd->logout_response) {
|
|
case ISCSI_LOGOUT_SUCCESS:
|
|
iscsit_logout_post_handler_diffcid(conn,
|
|
cmd->logout_cid);
|
|
break;
|
|
case ISCSI_LOGOUT_CID_NOT_FOUND:
|
|
case ISCSI_LOGOUT_CLEANUP_FAILED:
|
|
default:
|
|
break;
|
|
}
|
|
ret = 1;
|
|
}
|
|
break;
|
|
case ISCSI_LOGOUT_REASON_RECOVERY:
|
|
switch (cmd->logout_response) {
|
|
case ISCSI_LOGOUT_SUCCESS:
|
|
case ISCSI_LOGOUT_CID_NOT_FOUND:
|
|
case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED:
|
|
case ISCSI_LOGOUT_CLEANUP_FAILED:
|
|
default:
|
|
break;
|
|
}
|
|
ret = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(iscsit_logout_post_handler);
|
|
|
|
void iscsit_fail_session(struct iscsi_session *sess)
|
|
{
|
|
struct iscsi_conn *conn;
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
|
|
pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
|
|
conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT;
|
|
}
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
|
|
sess->session_state = TARG_SESS_STATE_FAILED;
|
|
}
|
|
|
|
int iscsit_free_session(struct iscsi_session *sess)
|
|
{
|
|
u16 conn_count = atomic_read(&sess->nconn);
|
|
struct iscsi_conn *conn, *conn_tmp = NULL;
|
|
int is_last;
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
atomic_set(&sess->sleep_on_sess_wait_comp, 1);
|
|
|
|
list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list,
|
|
conn_list) {
|
|
if (conn_count == 0)
|
|
break;
|
|
|
|
if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) {
|
|
is_last = 1;
|
|
} else {
|
|
iscsit_inc_conn_usage_count(conn_tmp);
|
|
is_last = 0;
|
|
}
|
|
iscsit_inc_conn_usage_count(conn);
|
|
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
iscsit_cause_connection_reinstatement(conn, 1);
|
|
spin_lock_bh(&sess->conn_lock);
|
|
|
|
iscsit_dec_conn_usage_count(conn);
|
|
if (is_last == 0)
|
|
iscsit_dec_conn_usage_count(conn_tmp);
|
|
|
|
conn_count--;
|
|
}
|
|
|
|
if (atomic_read(&sess->nconn)) {
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
wait_for_completion(&sess->session_wait_comp);
|
|
} else
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
iscsit_close_session(sess);
|
|
return 0;
|
|
}
|
|
|
|
void iscsit_stop_session(
|
|
struct iscsi_session *sess,
|
|
int session_sleep,
|
|
int connection_sleep)
|
|
{
|
|
u16 conn_count = atomic_read(&sess->nconn);
|
|
struct iscsi_conn *conn, *conn_tmp = NULL;
|
|
int is_last;
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
if (session_sleep)
|
|
atomic_set(&sess->sleep_on_sess_wait_comp, 1);
|
|
|
|
if (connection_sleep) {
|
|
list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list,
|
|
conn_list) {
|
|
if (conn_count == 0)
|
|
break;
|
|
|
|
if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) {
|
|
is_last = 1;
|
|
} else {
|
|
iscsit_inc_conn_usage_count(conn_tmp);
|
|
is_last = 0;
|
|
}
|
|
iscsit_inc_conn_usage_count(conn);
|
|
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
iscsit_cause_connection_reinstatement(conn, 1);
|
|
spin_lock_bh(&sess->conn_lock);
|
|
|
|
iscsit_dec_conn_usage_count(conn);
|
|
if (is_last == 0)
|
|
iscsit_dec_conn_usage_count(conn_tmp);
|
|
conn_count--;
|
|
}
|
|
} else {
|
|
list_for_each_entry(conn, &sess->sess_conn_list, conn_list)
|
|
iscsit_cause_connection_reinstatement(conn, 0);
|
|
}
|
|
|
|
if (session_sleep && atomic_read(&sess->nconn)) {
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
wait_for_completion(&sess->session_wait_comp);
|
|
} else
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
}
|
|
|
|
int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force)
|
|
{
|
|
struct iscsi_session *sess;
|
|
struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
|
|
struct se_session *se_sess, *se_sess_tmp;
|
|
LIST_HEAD(free_list);
|
|
int session_count = 0;
|
|
|
|
spin_lock_bh(&se_tpg->session_lock);
|
|
if (tpg->nsessions && !force) {
|
|
spin_unlock_bh(&se_tpg->session_lock);
|
|
return -1;
|
|
}
|
|
|
|
list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
|
|
sess_list) {
|
|
sess = (struct iscsi_session *)se_sess->fabric_sess_ptr;
|
|
|
|
spin_lock(&sess->conn_lock);
|
|
if (atomic_read(&sess->session_fall_back_to_erl0) ||
|
|
atomic_read(&sess->session_logout) ||
|
|
(sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
|
|
spin_unlock(&sess->conn_lock);
|
|
continue;
|
|
}
|
|
atomic_set(&sess->session_reinstatement, 1);
|
|
spin_unlock(&sess->conn_lock);
|
|
|
|
list_move_tail(&se_sess->sess_list, &free_list);
|
|
}
|
|
spin_unlock_bh(&se_tpg->session_lock);
|
|
|
|
list_for_each_entry_safe(se_sess, se_sess_tmp, &free_list, sess_list) {
|
|
sess = (struct iscsi_session *)se_sess->fabric_sess_ptr;
|
|
|
|
iscsit_free_session(sess);
|
|
session_count++;
|
|
}
|
|
|
|
pr_debug("Released %d iSCSI Session(s) from Target Portal"
|
|
" Group: %hu\n", session_count, tpg->tpgt);
|
|
return 0;
|
|
}
|
|
|
|
MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
|
|
MODULE_VERSION("4.1.x");
|
|
MODULE_AUTHOR("nab@Linux-iSCSI.org");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(iscsi_target_init_module);
|
|
module_exit(iscsi_target_cleanup_module);
|