blob: e9efdb1ebb2cddae6278f418ccbbbd4128cdd66c [file] [log] [blame]
/*******************************************************************************
* This file contains tcm implementation using v4 configfs fabric infrastructure
* for QLogic target mode HBAs
*
* © Copyright 2010-2011 RisingTide Systems LLC.
*
* Licensed to the Linux Foundation under the General Public License (GPL)
* version 2.
*
* Author: Nicholas A. Bellinger <nab@risingtidesystems.com>
*
* tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
* the TCM_FC / Open-FCoE.org fabric module.
*
* Copyright (c) 2010 Cisco Systems, Inc
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
****************************************************************************/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <generated/utsrelease.h>
#include <linux/utsname.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/kthread.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/configfs.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>
#include "qla_def.h"
#include "qla_target.h"
#include "tcm_qla2xxx.h"
struct workqueue_struct *tcm_qla2xxx_free_wq;
struct workqueue_struct *tcm_qla2xxx_cmd_wq;
static int tcm_qla2xxx_check_true(struct se_portal_group *se_tpg)
{
return 1;
}
static int tcm_qla2xxx_check_false(struct se_portal_group *se_tpg)
{
return 0;
}
/*
* Parse WWN.
* If strict, we require lower-case hex and colon separators to be sure
* the name is the same as what would be generated by ft_format_wwn()
* so the name and wwn are mapped one-to-one.
*/
static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
{
const char *cp;
char c;
u32 nibble;
u32 byte = 0;
u32 pos = 0;
u32 err;
*wwn = 0;
for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
c = *cp;
if (c == '\n' && cp[1] == '\0')
continue;
if (strict && pos++ == 2 && byte++ < 7) {
pos = 0;
if (c == ':')
continue;
err = 1;
goto fail;
}
if (c == '\0') {
err = 2;
if (strict && byte != 8)
goto fail;
return cp - name;
}
err = 3;
if (isdigit(c))
nibble = c - '0';
else if (isxdigit(c) && (islower(c) || !strict))
nibble = tolower(c) - 'a' + 10;
else
goto fail;
*wwn = (*wwn << 4) | nibble;
}
err = 4;
fail:
pr_debug("err %u len %zu pos %u byte %u\n",
err, cp - name, pos, byte);
return -1;
}
static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
{
u8 b[8];
put_unaligned_be64(wwn, b);
return snprintf(buf, len,
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
}
static char *tcm_qla2xxx_get_fabric_name(void)
{
return "qla2xxx";
}
/*
* From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
*/
static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
{
unsigned int i, j, value;
u8 wwn[8];
memset(wwn, 0, sizeof(wwn));
/* Validate and store the new name */
for (i = 0, j = 0; i < 16; i++) {
value = hex_to_bin(*ns++);
if (value >= 0)
j = (j << 4) | value;
else
return -EINVAL;
if (i % 2) {
wwn[i/2] = j & 0xff;
j = 0;
}
}
*nm = wwn_to_u64(wwn);
return 0;
}
/*
* This parsing logic follows drivers/scsi/scsi_transport_fc.c:
* store_fc_host_vport_create()
*/
static int tcm_qla2xxx_npiv_parse_wwn(
const char *name,
size_t count,
u64 *wwpn,
u64 *wwnn)
{
unsigned int cnt = count;
int rc;
*wwpn = 0;
*wwnn = 0;
/* count may include a LF at end of string */
if (name[cnt-1] == '\n')
cnt--;
/* validate we have enough characters for WWPN */
if ((cnt != (16+1+16)) || (name[16] != ':'))
return -EINVAL;
rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
if (rc != 0)
return rc;
rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
if (rc != 0)
return rc;
return 0;
}
static ssize_t tcm_qla2xxx_npiv_format_wwn(char *buf, size_t len,
u64 wwpn, u64 wwnn)
{
u8 b[8], b2[8];
put_unaligned_be64(wwpn, b);
put_unaligned_be64(wwnn, b2);
return snprintf(buf, len,
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x,"
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
b2[0], b2[1], b2[2], b2[3], b2[4], b2[5], b2[6], b2[7]);
}
static char *tcm_qla2xxx_npiv_get_fabric_name(void)
{
return "qla2xxx_npiv";
}
static u8 tcm_qla2xxx_get_fabric_proto_ident(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
u8 proto_id;
switch (lport->lport_proto_id) {
case SCSI_PROTOCOL_FCP:
default:
proto_id = fc_get_fabric_proto_ident(se_tpg);
break;
}
return proto_id;
}
static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
return &lport->lport_name[0];
}
static char *tcm_qla2xxx_npiv_get_fabric_wwn(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
return &lport->lport_npiv_name[0];
}
static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return tpg->lport_tpgt;
}
static u32 tcm_qla2xxx_get_default_depth(struct se_portal_group *se_tpg)
{
return 1;
}
static u32 tcm_qla2xxx_get_pr_transport_id(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code,
unsigned char *buf)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
int ret = 0;
switch (lport->lport_proto_id) {
case SCSI_PROTOCOL_FCP:
default:
ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
format_code, buf);
break;
}
return ret;
}
static u32 tcm_qla2xxx_get_pr_transport_id_len(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
int ret = 0;
switch (lport->lport_proto_id) {
case SCSI_PROTOCOL_FCP:
default:
ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
format_code);
break;
}
return ret;
}
static char *tcm_qla2xxx_parse_pr_out_transport_id(
struct se_portal_group *se_tpg,
const char *buf,
u32 *out_tid_len,
char **port_nexus_ptr)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
char *tid = NULL;
switch (lport->lport_proto_id) {
case SCSI_PROTOCOL_FCP:
default:
tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
port_nexus_ptr);
break;
}
return tid;
}
static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return QLA_TPG_ATTRIB(tpg)->generate_node_acls;
}
static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return QLA_TPG_ATTRIB(tpg)->cache_dynamic_acls;
}
static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return QLA_TPG_ATTRIB(tpg)->demo_mode_write_protect;
}
static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return QLA_TPG_ATTRIB(tpg)->prod_mode_write_protect;
}
static struct se_node_acl *tcm_qla2xxx_alloc_fabric_acl(
struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_nacl *nacl;
nacl = kzalloc(sizeof(struct tcm_qla2xxx_nacl), GFP_KERNEL);
if (!nacl) {
pr_err("Unable to alocate struct tcm_qla2xxx_nacl\n");
return NULL;
}
return &nacl->se_node_acl;
}
static void tcm_qla2xxx_release_fabric_acl(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl)
{
struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
struct tcm_qla2xxx_nacl, se_node_acl);
kfree(nacl);
}
static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return tpg->lport_tpgt;
}
static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
{
struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
struct qla_tgt_mgmt_cmd, free_work);
transport_generic_free_cmd(&mcmd->se_cmd, 0);
}
/*
* Called from qla_target_template->free_mcmd(), and will call
* tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
* release callback. qla_hw_data->hardware_lock is expected to be held
*/
static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
{
INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
}
static void tcm_qla2xxx_complete_free(struct work_struct *work)
{
struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
transport_generic_free_cmd(&cmd->se_cmd, 0);
}
/*
* Called from qla_target_template->free_cmd(), and will call
* tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
* release callback. qla_hw_data->hardware_lock is expected to be held
*/
static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
{
INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
queue_work(tcm_qla2xxx_free_wq, &cmd->work);
}
/*
* Called from struct target_core_fabric_ops->check_stop_free() context
*/
static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
{
return target_put_sess_cmd(se_cmd->se_sess, se_cmd);
}
/* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
* fabric descriptor @se_cmd command to release
*/
static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd;
if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
struct qla_tgt_mgmt_cmd, se_cmd);
qlt_free_mcmd(mcmd);
return;
}
cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
qlt_free_cmd(cmd);
}
static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
{
struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
struct scsi_qla_host *vha;
unsigned long flags;
BUG_ON(!sess);
vha = sess->vha;
spin_lock_irqsave(&vha->hw->hardware_lock, flags);
sess->tearing_down = 1;
target_splice_sess_cmd_list(se_sess);
spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
return 1;
}
static void tcm_qla2xxx_close_session(struct se_session *se_sess)
{
struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
struct scsi_qla_host *vha;
unsigned long flags;
BUG_ON(!sess);
vha = sess->vha;
spin_lock_irqsave(&vha->hw->hardware_lock, flags);
qlt_unreg_sess(sess);
spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
}
static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
{
return 0;
}
/*
* The LIO target core uses DMA_TO_DEVICE to mean that data is going
* to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
* that data is coming from the target (eg handling a READ). However,
* this is just the opposite of what we have to tell the DMA mapping
* layer -- eg when handling a READ, the HBA will have to DMA the data
* out of memory so it can send it to the initiator, which means we
* need to use DMA_TO_DEVICE when we map the data.
*/
static enum dma_data_direction tcm_qla2xxx_mapping_dir(struct se_cmd *se_cmd)
{
if (se_cmd->se_cmd_flags & SCF_BIDI)
return DMA_BIDIRECTIONAL;
switch (se_cmd->data_direction) {
case DMA_TO_DEVICE:
return DMA_FROM_DEVICE;
case DMA_FROM_DEVICE:
return DMA_TO_DEVICE;
case DMA_NONE:
default:
return DMA_NONE;
}
}
static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
cmd->bufflen = se_cmd->data_length;
cmd->dma_data_direction = tcm_qla2xxx_mapping_dir(se_cmd);
cmd->sg_cnt = se_cmd->t_data_nents;
cmd->sg = se_cmd->t_data_sg;
/*
* qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
* the SGL mappings into PCIe memory for incoming FCP WRITE data.
*/
return qlt_rdy_to_xfer(cmd);
}
static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
{
unsigned long flags;
/*
* Check for WRITE_PENDING status to determine if we need to wait for
* CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
*/
spin_lock_irqsave(&se_cmd->t_state_lock, flags);
if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
3000);
return 0;
}
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
return 0;
}
static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
{
return;
}
static u32 tcm_qla2xxx_get_task_tag(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
return cmd->tag;
}
static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
{
return 0;
}
/*
* Called from process context in qla_target.c:qlt_do_work() code
*/
static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
int data_dir, int bidi)
{
struct se_cmd *se_cmd = &cmd->se_cmd;
struct se_session *se_sess;
struct qla_tgt_sess *sess;
int flags = TARGET_SCF_ACK_KREF;
if (bidi)
flags |= TARGET_SCF_BIDI_OP;
sess = cmd->sess;
if (!sess) {
pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
return -EINVAL;
}
se_sess = sess->se_sess;
if (!se_sess) {
pr_err("Unable to locate active struct se_session\n");
return -EINVAL;
}
target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
cmd->unpacked_lun, data_length, fcp_task_attr,
data_dir, flags);
return 0;
}
static void tcm_qla2xxx_do_rsp(struct work_struct *work)
{
struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
/*
* Dispatch ->queue_status from workqueue process context
*/
transport_generic_request_failure(&cmd->se_cmd);
}
/*
* Called from qla_target.c:qlt_do_ctio_completion()
*/
static int tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
{
struct se_cmd *se_cmd = &cmd->se_cmd;
unsigned long flags;
/*
* Ensure that the complete FCP WRITE payload has been received.
* Otherwise return an exception via CHECK_CONDITION status.
*/
if (!cmd->write_data_transferred) {
/*
* Check if se_cmd has already been aborted via LUN_RESET, and
* waiting upon completion in tcm_qla2xxx_write_pending_status()
*/
spin_lock_irqsave(&se_cmd->t_state_lock, flags);
if (se_cmd->transport_state & CMD_T_ABORTED) {
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
complete(&se_cmd->t_transport_stop_comp);
return 0;
}
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
se_cmd->scsi_sense_reason = TCM_CHECK_CONDITION_ABORT_CMD;
INIT_WORK(&cmd->work, tcm_qla2xxx_do_rsp);
queue_work(tcm_qla2xxx_free_wq, &cmd->work);
return 0;
}
/*
* We now tell TCM to queue this WRITE CDB with TRANSPORT_PROCESS_WRITE
* status to the backstore processing thread.
*/
return transport_generic_handle_data(&cmd->se_cmd);
}
/*
* Called from qla_target.c:qlt_issue_task_mgmt()
*/
int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
uint8_t tmr_func, uint32_t tag)
{
struct qla_tgt_sess *sess = mcmd->sess;
struct se_cmd *se_cmd = &mcmd->se_cmd;
return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
}
static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
cmd->bufflen = se_cmd->data_length;
cmd->dma_data_direction = tcm_qla2xxx_mapping_dir(se_cmd);
cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
cmd->sg_cnt = se_cmd->t_data_nents;
cmd->sg = se_cmd->t_data_sg;
cmd->offset = 0;
/*
* Now queue completed DATA_IN the qla2xxx LLD and response ring
*/
return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
se_cmd->scsi_status);
}
static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
int xmit_type = QLA_TGT_XMIT_STATUS;
cmd->bufflen = se_cmd->data_length;
cmd->sg = NULL;
cmd->sg_cnt = 0;
cmd->offset = 0;
cmd->dma_data_direction = tcm_qla2xxx_mapping_dir(se_cmd);
cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
if (se_cmd->data_direction == DMA_FROM_DEVICE) {
/*
* For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
* for qla_tgt_xmit_response LLD code
*/
se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
se_cmd->residual_count = se_cmd->data_length;
cmd->bufflen = 0;
}
/*
* Now queue status response to qla2xxx LLD code and response ring
*/
return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
}
static int tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
{
struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
struct qla_tgt_mgmt_cmd, se_cmd);
pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
mcmd, se_tmr->function, se_tmr->response);
/*
* Do translation between TCM TM response codes and
* QLA2xxx FC TM response codes.
*/
switch (se_tmr->response) {
case TMR_FUNCTION_COMPLETE:
mcmd->fc_tm_rsp = FC_TM_SUCCESS;
break;
case TMR_TASK_DOES_NOT_EXIST:
mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
break;
case TMR_FUNCTION_REJECTED:
mcmd->fc_tm_rsp = FC_TM_REJECT;
break;
case TMR_LUN_DOES_NOT_EXIST:
default:
mcmd->fc_tm_rsp = FC_TM_FAILED;
break;
}
/*
* Queue the TM response to QLA2xxx LLD to build a
* CTIO response packet.
*/
qlt_xmit_tm_rsp(mcmd);
return 0;
}
static u16 tcm_qla2xxx_get_fabric_sense_len(void)
{
return 0;
}
static u16 tcm_qla2xxx_set_fabric_sense_len(struct se_cmd *se_cmd,
u32 sense_length)
{
return 0;
}
/* Local pointer to allocated TCM configfs fabric module */
struct target_fabric_configfs *tcm_qla2xxx_fabric_configfs;
struct target_fabric_configfs *tcm_qla2xxx_npiv_fabric_configfs;
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
/*
* Expected to be called with struct qla_hw_data->hardware_lock held
*/
static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
{
struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
struct se_portal_group *se_tpg = se_nacl->se_tpg;
struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
struct tcm_qla2xxx_nacl, se_node_acl);
void *node;
pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
WARN_ON(node && (node != se_nacl));
pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX,"
" port_id: 0x%06x\n", se_nacl, nacl->nport_wwnn,
nacl->nport_id);
/*
* Now clear the se_nacl and session pointers from our HW lport lookup
* table mapping for this initiator's fabric S_ID and LOOP_ID entries.
*
* This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
* target_wait_for_sess_cmds() before the session waits for outstanding
* I/O to complete, to avoid a race between session shutdown execution
* and incoming ATIOs or TMRs picking up a stale se_node_act reference.
*/
tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
}
static void tcm_qla2xxx_release_session(struct kref *kref)
{
struct se_session *se_sess = container_of(kref,
struct se_session, sess_kref);
qlt_unreg_sess(se_sess->fabric_sess_ptr);
}
static void tcm_qla2xxx_put_session(struct se_session *se_sess)
{
struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
struct qla_hw_data *ha = sess->vha->hw;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
{
tcm_qla2xxx_put_session(sess->se_sess);
}
static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
{
tcm_qla2xxx_shutdown_session(sess->se_sess);
}
static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
struct se_portal_group *se_tpg,
struct config_group *group,
const char *name)
{
struct se_node_acl *se_nacl, *se_nacl_new;
struct tcm_qla2xxx_nacl *nacl;
u64 wwnn;
u32 qla2xxx_nexus_depth;
if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
return ERR_PTR(-EINVAL);
se_nacl_new = tcm_qla2xxx_alloc_fabric_acl(se_tpg);
if (!se_nacl_new)
return ERR_PTR(-ENOMEM);
/* #warning FIXME: Hardcoded qla2xxx_nexus depth in tcm_qla2xxx_make_nodeacl */
qla2xxx_nexus_depth = 1;
/*
* se_nacl_new may be released by core_tpg_add_initiator_node_acl()
* when converting a NodeACL from demo mode -> explict
*/
se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
name, qla2xxx_nexus_depth);
if (IS_ERR(se_nacl)) {
tcm_qla2xxx_release_fabric_acl(se_tpg, se_nacl_new);
return se_nacl;
}
/*
* Locate our struct tcm_qla2xxx_nacl and set the FC Nport WWPN
*/
nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
nacl->nport_wwnn = wwnn;
tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
return se_nacl;
}
static void tcm_qla2xxx_drop_nodeacl(struct se_node_acl *se_acl)
{
struct se_portal_group *se_tpg = se_acl->se_tpg;
struct tcm_qla2xxx_nacl *nacl = container_of(se_acl,
struct tcm_qla2xxx_nacl, se_node_acl);
core_tpg_del_initiator_node_acl(se_tpg, se_acl, 1);
kfree(nacl);
}
/* Start items for tcm_qla2xxx_tpg_attrib_cit */
#define DEF_QLA_TPG_ATTRIB(name) \
\
static ssize_t tcm_qla2xxx_tpg_attrib_show_##name( \
struct se_portal_group *se_tpg, \
char *page) \
{ \
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
struct tcm_qla2xxx_tpg, se_tpg); \
\
return sprintf(page, "%u\n", QLA_TPG_ATTRIB(tpg)->name); \
} \
\
static ssize_t tcm_qla2xxx_tpg_attrib_store_##name( \
struct se_portal_group *se_tpg, \
const char *page, \
size_t count) \
{ \
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
struct tcm_qla2xxx_tpg, se_tpg); \
unsigned long val; \
int ret; \
\
ret = kstrtoul(page, 0, &val); \
if (ret < 0) { \
pr_err("kstrtoul() failed with" \
" ret: %d\n", ret); \
return -EINVAL; \
} \
ret = tcm_qla2xxx_set_attrib_##name(tpg, val); \
\
return (!ret) ? count : -EINVAL; \
}
#define DEF_QLA_TPG_ATTR_BOOL(_name) \
\
static int tcm_qla2xxx_set_attrib_##_name( \
struct tcm_qla2xxx_tpg *tpg, \
unsigned long val) \
{ \
struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib; \
\
if ((val != 0) && (val != 1)) { \
pr_err("Illegal boolean value %lu\n", val); \
return -EINVAL; \
} \
\
a->_name = val; \
return 0; \
}
#define QLA_TPG_ATTR(_name, _mode) \
TF_TPG_ATTRIB_ATTR(tcm_qla2xxx, _name, _mode);
/*
* Define tcm_qla2xxx_tpg_attrib_s_generate_node_acls
*/
DEF_QLA_TPG_ATTR_BOOL(generate_node_acls);
DEF_QLA_TPG_ATTRIB(generate_node_acls);
QLA_TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
/*
Define tcm_qla2xxx_attrib_s_cache_dynamic_acls
*/
DEF_QLA_TPG_ATTR_BOOL(cache_dynamic_acls);
DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
QLA_TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
/*
* Define tcm_qla2xxx_tpg_attrib_s_demo_mode_write_protect
*/
DEF_QLA_TPG_ATTR_BOOL(demo_mode_write_protect);
DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
QLA_TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
/*
* Define tcm_qla2xxx_tpg_attrib_s_prod_mode_write_protect
*/
DEF_QLA_TPG_ATTR_BOOL(prod_mode_write_protect);
DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
QLA_TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
&tcm_qla2xxx_tpg_attrib_generate_node_acls.attr,
&tcm_qla2xxx_tpg_attrib_cache_dynamic_acls.attr,
&tcm_qla2xxx_tpg_attrib_demo_mode_write_protect.attr,
&tcm_qla2xxx_tpg_attrib_prod_mode_write_protect.attr,
NULL,
};
/* End items for tcm_qla2xxx_tpg_attrib_cit */
static ssize_t tcm_qla2xxx_tpg_show_enable(
struct se_portal_group *se_tpg,
char *page)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
return snprintf(page, PAGE_SIZE, "%d\n",
atomic_read(&tpg->lport_tpg_enabled));
}
static ssize_t tcm_qla2xxx_tpg_store_enable(
struct se_portal_group *se_tpg,
const char *page,
size_t count)
{
struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct scsi_qla_host *vha = lport->qla_vha;
struct qla_hw_data *ha = vha->hw;
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
unsigned long op;
int rc;
rc = kstrtoul(page, 0, &op);
if (rc < 0) {
pr_err("kstrtoul() returned %d\n", rc);
return -EINVAL;
}
if ((op != 1) && (op != 0)) {
pr_err("Illegal value for tpg_enable: %lu\n", op);
return -EINVAL;
}
if (op) {
atomic_set(&tpg->lport_tpg_enabled, 1);
qlt_enable_vha(vha);
} else {
if (!ha->tgt.qla_tgt) {
pr_err("truct qla_hw_data *ha->tgt.qla_tgt is NULL\n");
return -ENODEV;
}
atomic_set(&tpg->lport_tpg_enabled, 0);
qlt_stop_phase1(ha->tgt.qla_tgt);
}
return count;
}
TF_TPG_BASE_ATTR(tcm_qla2xxx, enable, S_IRUGO | S_IWUSR);
static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
&tcm_qla2xxx_tpg_enable.attr,
NULL,
};
static struct se_portal_group *tcm_qla2xxx_make_tpg(
struct se_wwn *wwn,
struct config_group *group,
const char *name)
{
struct tcm_qla2xxx_lport *lport = container_of(wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct tcm_qla2xxx_tpg *tpg;
unsigned long tpgt;
int ret;
if (strstr(name, "tpgt_") != name)
return ERR_PTR(-EINVAL);
if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
return ERR_PTR(-EINVAL);
if (!lport->qla_npiv_vp && (tpgt != 1)) {
pr_err("In non NPIV mode, a single TPG=1 is used for"
" HW port mappings\n");
return ERR_PTR(-ENOSYS);
}
tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
if (!tpg) {
pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
return ERR_PTR(-ENOMEM);
}
tpg->lport = lport;
tpg->lport_tpgt = tpgt;
/*
* By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
* NodeACLs
*/
QLA_TPG_ATTRIB(tpg)->generate_node_acls = 1;
QLA_TPG_ATTRIB(tpg)->demo_mode_write_protect = 1;
QLA_TPG_ATTRIB(tpg)->cache_dynamic_acls = 1;
ret = core_tpg_register(&tcm_qla2xxx_fabric_configfs->tf_ops, wwn,
&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
if (ret < 0) {
kfree(tpg);
return NULL;
}
/*
* Setup local TPG=1 pointer for non NPIV mode.
*/
if (lport->qla_npiv_vp == NULL)
lport->tpg_1 = tpg;
return &tpg->se_tpg;
}
static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
{
struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
struct tcm_qla2xxx_tpg, se_tpg);
struct tcm_qla2xxx_lport *lport = tpg->lport;
struct scsi_qla_host *vha = lport->qla_vha;
struct qla_hw_data *ha = vha->hw;
/*
* Call into qla2x_target.c LLD logic to shutdown the active
* FC Nexuses and disable target mode operation for this qla_hw_data
*/
if (ha->tgt.qla_tgt && !ha->tgt.qla_tgt->tgt_stop)
qlt_stop_phase1(ha->tgt.qla_tgt);
core_tpg_deregister(se_tpg);
/*
* Clear local TPG=1 pointer for non NPIV mode.
*/
if (lport->qla_npiv_vp == NULL)
lport->tpg_1 = NULL;
kfree(tpg);
}
static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
struct se_wwn *wwn,
struct config_group *group,
const char *name)
{
struct tcm_qla2xxx_lport *lport = container_of(wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct tcm_qla2xxx_tpg *tpg;
unsigned long tpgt;
int ret;
if (strstr(name, "tpgt_") != name)
return ERR_PTR(-EINVAL);
if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
return ERR_PTR(-EINVAL);
tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
if (!tpg) {
pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
return ERR_PTR(-ENOMEM);
}
tpg->lport = lport;
tpg->lport_tpgt = tpgt;
ret = core_tpg_register(&tcm_qla2xxx_npiv_fabric_configfs->tf_ops, wwn,
&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
if (ret < 0) {
kfree(tpg);
return NULL;
}
return &tpg->se_tpg;
}
/*
* Expected to be called with struct qla_hw_data->hardware_lock held
*/
static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
scsi_qla_host_t *vha,
const uint8_t *s_id)
{
struct qla_hw_data *ha = vha->hw;
struct tcm_qla2xxx_lport *lport;
struct se_node_acl *se_nacl;
struct tcm_qla2xxx_nacl *nacl;
u32 key;
lport = ha->tgt.target_lport_ptr;
if (!lport) {
pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
dump_stack();
return NULL;
}
key = (((unsigned long)s_id[0] << 16) |
((unsigned long)s_id[1] << 8) |
(unsigned long)s_id[2]);
pr_debug("find_sess_by_s_id: 0x%06x\n", key);
se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
if (!se_nacl) {
pr_debug("Unable to locate s_id: 0x%06x\n", key);
return NULL;
}
pr_debug("find_sess_by_s_id: located se_nacl: %p,"
" initiatorname: %s\n", se_nacl, se_nacl->initiatorname);
nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
if (!nacl->qla_tgt_sess) {
pr_err("Unable to locate struct qla_tgt_sess\n");
return NULL;
}
return nacl->qla_tgt_sess;
}
/*
* Expected to be called with struct qla_hw_data->hardware_lock held
*/
static void tcm_qla2xxx_set_sess_by_s_id(
struct tcm_qla2xxx_lport *lport,
struct se_node_acl *new_se_nacl,
struct tcm_qla2xxx_nacl *nacl,
struct se_session *se_sess,
struct qla_tgt_sess *qla_tgt_sess,
uint8_t *s_id)
{
u32 key;
void *slot;
int rc;
key = (((unsigned long)s_id[0] << 16) |
((unsigned long)s_id[1] << 8) |
(unsigned long)s_id[2]);
pr_debug("set_sess_by_s_id: %06x\n", key);
slot = btree_lookup32(&lport->lport_fcport_map, key);
if (!slot) {
if (new_se_nacl) {
pr_debug("Setting up new fc_port entry to new_se_nacl\n");
nacl->nport_id = key;
rc = btree_insert32(&lport->lport_fcport_map, key,
new_se_nacl, GFP_ATOMIC);
if (rc)
printk(KERN_ERR "Unable to insert s_id into"
" fcport_map: %06x\n", (int)key);
} else {
pr_debug("Wiping nonexisting fc_port entry\n");
}
qla_tgt_sess->se_sess = se_sess;
nacl->qla_tgt_sess = qla_tgt_sess;
return;
}
if (nacl->qla_tgt_sess) {
if (new_se_nacl == NULL) {
pr_debug("Clearing existing nacl->qla_tgt_sess"
" and fc_port entry\n");
btree_remove32(&lport->lport_fcport_map, key);
nacl->qla_tgt_sess = NULL;
return;
}
pr_debug("Replacing existing nacl->qla_tgt_sess and"
" fc_port entry\n");
btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
qla_tgt_sess->se_sess = se_sess;
nacl->qla_tgt_sess = qla_tgt_sess;
return;
}
if (new_se_nacl == NULL) {
pr_debug("Clearing existing fc_port entry\n");
btree_remove32(&lport->lport_fcport_map, key);
return;
}
pr_debug("Replacing existing fc_port entry w/o active"
" nacl->qla_tgt_sess\n");
btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
qla_tgt_sess->se_sess = se_sess;
nacl->qla_tgt_sess = qla_tgt_sess;
pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p,"
" initiatorname: %s\n", nacl->qla_tgt_sess, new_se_nacl,
new_se_nacl->initiatorname);
}
/*
* Expected to be called with struct qla_hw_data->hardware_lock held
*/
static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
scsi_qla_host_t *vha,
const uint16_t loop_id)
{
struct qla_hw_data *ha = vha->hw;
struct tcm_qla2xxx_lport *lport;
struct se_node_acl *se_nacl;
struct tcm_qla2xxx_nacl *nacl;
struct tcm_qla2xxx_fc_loopid *fc_loopid;
lport = ha->tgt.target_lport_ptr;
if (!lport) {
pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
dump_stack();
return NULL;
}
pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
fc_loopid = lport->lport_loopid_map + loop_id;
se_nacl = fc_loopid->se_nacl;
if (!se_nacl) {
pr_debug("Unable to locate se_nacl by loop_id:"
" 0x%04x\n", loop_id);
return NULL;
}
nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
if (!nacl->qla_tgt_sess) {
pr_err("Unable to locate struct qla_tgt_sess\n");
return NULL;
}
return nacl->qla_tgt_sess;
}
/*
* Expected to be called with struct qla_hw_data->hardware_lock held
*/
static void tcm_qla2xxx_set_sess_by_loop_id(
struct tcm_qla2xxx_lport *lport,
struct se_node_acl *new_se_nacl,
struct tcm_qla2xxx_nacl *nacl,
struct se_session *se_sess,
struct qla_tgt_sess *qla_tgt_sess,
uint16_t loop_id)
{
struct se_node_acl *saved_nacl;
struct tcm_qla2xxx_fc_loopid *fc_loopid;
pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
lport->lport_loopid_map)[loop_id];
saved_nacl = fc_loopid->se_nacl;
if (!saved_nacl) {
pr_debug("Setting up new fc_loopid->se_nacl"
" to new_se_nacl\n");
fc_loopid->se_nacl = new_se_nacl;
if (qla_tgt_sess->se_sess != se_sess)
qla_tgt_sess->se_sess = se_sess;
if (nacl->qla_tgt_sess != qla_tgt_sess)
nacl->qla_tgt_sess = qla_tgt_sess;
return;
}
if (nacl->qla_tgt_sess) {
if (new_se_nacl == NULL) {
pr_debug("Clearing nacl->qla_tgt_sess and"
" fc_loopid->se_nacl\n");
fc_loopid->se_nacl = NULL;
nacl->qla_tgt_sess = NULL;
return;
}
pr_debug("Replacing existing nacl->qla_tgt_sess and"
" fc_loopid->se_nacl\n");
fc_loopid->se_nacl = new_se_nacl;
if (qla_tgt_sess->se_sess != se_sess)
qla_tgt_sess->se_sess = se_sess;
if (nacl->qla_tgt_sess != qla_tgt_sess)
nacl->qla_tgt_sess = qla_tgt_sess;
return;
}
if (new_se_nacl == NULL) {
pr_debug("Clearing fc_loopid->se_nacl\n");
fc_loopid->se_nacl = NULL;
return;
}
pr_debug("Replacing existing fc_loopid->se_nacl w/o"
" active nacl->qla_tgt_sess\n");
fc_loopid->se_nacl = new_se_nacl;
if (qla_tgt_sess->se_sess != se_sess)
qla_tgt_sess->se_sess = se_sess;
if (nacl->qla_tgt_sess != qla_tgt_sess)
nacl->qla_tgt_sess = qla_tgt_sess;
pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p,"
" initiatorname: %s\n", nacl->qla_tgt_sess, new_se_nacl,
new_se_nacl->initiatorname);
}
/*
* Should always be called with qla_hw_data->hardware_lock held.
*/
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
{
struct se_session *se_sess = sess->se_sess;
unsigned char be_sid[3];
be_sid[0] = sess->s_id.b.domain;
be_sid[1] = sess->s_id.b.area;
be_sid[2] = sess->s_id.b.al_pa;
tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
sess, be_sid);
tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
sess, sess->loop_id);
}
static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
{
struct qla_tgt *tgt = sess->tgt;
struct qla_hw_data *ha = tgt->ha;
struct se_session *se_sess;
struct se_node_acl *se_nacl;
struct tcm_qla2xxx_lport *lport;
struct tcm_qla2xxx_nacl *nacl;
BUG_ON(in_interrupt());
se_sess = sess->se_sess;
if (!se_sess) {
pr_err("struct qla_tgt_sess->se_sess is NULL\n");
dump_stack();
return;
}
se_nacl = se_sess->se_node_acl;
nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
lport = ha->tgt.target_lport_ptr;
if (!lport) {
pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
dump_stack();
return;
}
target_wait_for_sess_cmds(se_sess, 0);
transport_deregister_session_configfs(sess->se_sess);
transport_deregister_session(sess->se_sess);
}
/*
* Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
* to locate struct se_node_acl
*/
static int tcm_qla2xxx_check_initiator_node_acl(
scsi_qla_host_t *vha,
unsigned char *fc_wwpn,
void *qla_tgt_sess,
uint8_t *s_id,
uint16_t loop_id)
{
struct qla_hw_data *ha = vha->hw;
struct tcm_qla2xxx_lport *lport;
struct tcm_qla2xxx_tpg *tpg;
struct tcm_qla2xxx_nacl *nacl;
struct se_portal_group *se_tpg;
struct se_node_acl *se_nacl;
struct se_session *se_sess;
struct qla_tgt_sess *sess = qla_tgt_sess;
unsigned char port_name[36];
unsigned long flags;
lport = ha->tgt.target_lport_ptr;
if (!lport) {
pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
dump_stack();
return -EINVAL;
}
/*
* Locate the TPG=1 reference..
*/
tpg = lport->tpg_1;
if (!tpg) {
pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
return -EINVAL;
}
se_tpg = &tpg->se_tpg;
se_sess = transport_init_session();
if (IS_ERR(se_sess)) {
pr_err("Unable to initialize struct se_session\n");
return PTR_ERR(se_sess);
}
/*
* Format the FCP Initiator port_name into colon seperated values to
* match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
*/
memset(&port_name, 0, 36);
snprintf(port_name, 36, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
fc_wwpn[0], fc_wwpn[1], fc_wwpn[2], fc_wwpn[3], fc_wwpn[4],
fc_wwpn[5], fc_wwpn[6], fc_wwpn[7]);
/*
* Locate our struct se_node_acl either from an explict NodeACL created
* via ConfigFS, or via running in TPG demo mode.
*/
se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
port_name);
if (!se_sess->se_node_acl) {
transport_free_session(se_sess);
return -EINVAL;
}
se_nacl = se_sess->se_node_acl;
nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
/*
* And now setup the new se_nacl and session pointers into our HW lport
* mappings for fabric S_ID and LOOP_ID.
*/
spin_lock_irqsave(&ha->hardware_lock, flags);
tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
qla_tgt_sess, s_id);
tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
qla_tgt_sess, loop_id);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
/*
* Finally register the new FC Nexus with TCM
*/
__transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
return 0;
}
/*
* Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
*/
static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
.handle_cmd = tcm_qla2xxx_handle_cmd,
.handle_data = tcm_qla2xxx_handle_data,
.handle_tmr = tcm_qla2xxx_handle_tmr,
.free_cmd = tcm_qla2xxx_free_cmd,
.free_mcmd = tcm_qla2xxx_free_mcmd,
.free_session = tcm_qla2xxx_free_session,
.check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
.find_sess_by_s_id = tcm_qla2xxx_find_sess_by_s_id,
.find_sess_by_loop_id = tcm_qla2xxx_find_sess_by_loop_id,
.clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
.put_sess = tcm_qla2xxx_put_sess,
.shutdown_sess = tcm_qla2xxx_shutdown_sess,
};
static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
{
int rc;
rc = btree_init32(&lport->lport_fcport_map);
if (rc) {
pr_err("Unable to initialize lport->lport_fcport_map btree\n");
return rc;
}
lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
65536);
if (!lport->lport_loopid_map) {
pr_err("Unable to allocate lport->lport_loopid_map"
" of %zu bytes\n", sizeof(struct tcm_qla2xxx_fc_loopid)
* 65536);
btree_destroy32(&lport->lport_fcport_map);
return -ENOMEM;
}
memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
* 65536);
pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
return 0;
}
static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha)
{
struct qla_hw_data *ha = vha->hw;
struct tcm_qla2xxx_lport *lport;
/*
* Setup local pointer to vha, NPIV VP pointer (if present) and
* vha->tcm_lport pointer
*/
lport = (struct tcm_qla2xxx_lport *)ha->tgt.target_lport_ptr;
lport->qla_vha = vha;
return 0;
}
static struct se_wwn *tcm_qla2xxx_make_lport(
struct target_fabric_configfs *tf,
struct config_group *group,
const char *name)
{
struct tcm_qla2xxx_lport *lport;
u64 wwpn;
int ret = -ENODEV;
if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
return ERR_PTR(-EINVAL);
lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
if (!lport) {
pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
return ERR_PTR(-ENOMEM);
}
lport->lport_wwpn = wwpn;
tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
wwpn);
ret = tcm_qla2xxx_init_lport(lport);
if (ret != 0)
goto out;
ret = qlt_lport_register(&tcm_qla2xxx_template, wwpn,
tcm_qla2xxx_lport_register_cb, lport);
if (ret != 0)
goto out_lport;
return &lport->lport_wwn;
out_lport:
vfree(lport->lport_loopid_map);
btree_destroy32(&lport->lport_fcport_map);
out:
kfree(lport);
return ERR_PTR(ret);
}
static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
{
struct tcm_qla2xxx_lport *lport = container_of(wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct scsi_qla_host *vha = lport->qla_vha;
struct qla_hw_data *ha = vha->hw;
struct se_node_acl *node;
u32 key = 0;
/*
* Call into qla2x_target.c LLD logic to complete the
* shutdown of struct qla_tgt after the call to
* qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
*/
if (ha->tgt.qla_tgt && !ha->tgt.qla_tgt->tgt_stopped)
qlt_stop_phase2(ha->tgt.qla_tgt);
qlt_lport_deregister(vha);
vfree(lport->lport_loopid_map);
btree_for_each_safe32(&lport->lport_fcport_map, key, node)
btree_remove32(&lport->lport_fcport_map, key);
btree_destroy32(&lport->lport_fcport_map);
kfree(lport);
}
static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
struct target_fabric_configfs *tf,
struct config_group *group,
const char *name)
{
struct tcm_qla2xxx_lport *lport;
u64 npiv_wwpn, npiv_wwnn;
int ret;
if (tcm_qla2xxx_npiv_parse_wwn(name, strlen(name)+1,
&npiv_wwpn, &npiv_wwnn) < 0)
return ERR_PTR(-EINVAL);
lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
if (!lport) {
pr_err("Unable to allocate struct tcm_qla2xxx_lport"
" for NPIV\n");
return ERR_PTR(-ENOMEM);
}
lport->lport_npiv_wwpn = npiv_wwpn;
lport->lport_npiv_wwnn = npiv_wwnn;
tcm_qla2xxx_npiv_format_wwn(&lport->lport_npiv_name[0],
TCM_QLA2XXX_NAMELEN, npiv_wwpn, npiv_wwnn);
/* FIXME: tcm_qla2xxx_npiv_make_lport */
ret = -ENOSYS;
if (ret != 0)
goto out;
return &lport->lport_wwn;
out:
kfree(lport);
return ERR_PTR(ret);
}
static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
{
struct tcm_qla2xxx_lport *lport = container_of(wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct scsi_qla_host *vha = lport->qla_vha;
struct Scsi_Host *sh = vha->host;
/*
* Notify libfc that we want to release the lport->npiv_vport
*/
fc_vport_terminate(lport->npiv_vport);
scsi_host_put(sh);
kfree(lport);
}
static ssize_t tcm_qla2xxx_wwn_show_attr_version(
struct target_fabric_configfs *tf,
char *page)
{
return sprintf(page, "TCM QLOGIC QLA2XXX NPIV capable fabric module %s"
" on %s/%s on "UTS_RELEASE"\n", TCM_QLA2XXX_VERSION,
utsname()->sysname, utsname()->machine);
}
TF_WWN_ATTR_RO(tcm_qla2xxx, version);
static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
&tcm_qla2xxx_wwn_version.attr,
NULL,
};
static struct target_core_fabric_ops tcm_qla2xxx_ops = {
.get_fabric_name = tcm_qla2xxx_get_fabric_name,
.get_fabric_proto_ident = tcm_qla2xxx_get_fabric_proto_ident,
.tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
.tpg_get_tag = tcm_qla2xxx_get_tag,
.tpg_get_default_depth = tcm_qla2xxx_get_default_depth,
.tpg_get_pr_transport_id = tcm_qla2xxx_get_pr_transport_id,
.tpg_get_pr_transport_id_len = tcm_qla2xxx_get_pr_transport_id_len,
.tpg_parse_pr_out_transport_id = tcm_qla2xxx_parse_pr_out_transport_id,
.tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
.tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
.tpg_check_demo_mode_write_protect =
tcm_qla2xxx_check_demo_write_protect,
.tpg_check_prod_mode_write_protect =
tcm_qla2xxx_check_prod_write_protect,
.tpg_check_demo_mode_login_only = tcm_qla2xxx_check_true,
.tpg_alloc_fabric_acl = tcm_qla2xxx_alloc_fabric_acl,
.tpg_release_fabric_acl = tcm_qla2xxx_release_fabric_acl,
.tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
.new_cmd_map = NULL,
.check_stop_free = tcm_qla2xxx_check_stop_free,
.release_cmd = tcm_qla2xxx_release_cmd,
.put_session = tcm_qla2xxx_put_session,
.shutdown_session = tcm_qla2xxx_shutdown_session,
.close_session = tcm_qla2xxx_close_session,
.sess_get_index = tcm_qla2xxx_sess_get_index,
.sess_get_initiator_sid = NULL,
.write_pending = tcm_qla2xxx_write_pending,
.write_pending_status = tcm_qla2xxx_write_pending_status,
.set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
.get_task_tag = tcm_qla2xxx_get_task_tag,
.get_cmd_state = tcm_qla2xxx_get_cmd_state,
.queue_data_in = tcm_qla2xxx_queue_data_in,
.queue_status = tcm_qla2xxx_queue_status,
.queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
.get_fabric_sense_len = tcm_qla2xxx_get_fabric_sense_len,
.set_fabric_sense_len = tcm_qla2xxx_set_fabric_sense_len,
/*
* Setup function pointers for generic logic in
* target_core_fabric_configfs.c
*/
.fabric_make_wwn = tcm_qla2xxx_make_lport,
.fabric_drop_wwn = tcm_qla2xxx_drop_lport,
.fabric_make_tpg = tcm_qla2xxx_make_tpg,
.fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
.fabric_post_link = NULL,
.fabric_pre_unlink = NULL,
.fabric_make_np = NULL,
.fabric_drop_np = NULL,
.fabric_make_nodeacl = tcm_qla2xxx_make_nodeacl,
.fabric_drop_nodeacl = tcm_qla2xxx_drop_nodeacl,
};
static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
.get_fabric_name = tcm_qla2xxx_npiv_get_fabric_name,
.get_fabric_proto_ident = tcm_qla2xxx_get_fabric_proto_ident,
.tpg_get_wwn = tcm_qla2xxx_npiv_get_fabric_wwn,
.tpg_get_tag = tcm_qla2xxx_get_tag,
.tpg_get_default_depth = tcm_qla2xxx_get_default_depth,
.tpg_get_pr_transport_id = tcm_qla2xxx_get_pr_transport_id,
.tpg_get_pr_transport_id_len = tcm_qla2xxx_get_pr_transport_id_len,
.tpg_parse_pr_out_transport_id = tcm_qla2xxx_parse_pr_out_transport_id,
.tpg_check_demo_mode = tcm_qla2xxx_check_false,
.tpg_check_demo_mode_cache = tcm_qla2xxx_check_true,
.tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_true,
.tpg_check_prod_mode_write_protect = tcm_qla2xxx_check_false,
.tpg_check_demo_mode_login_only = tcm_qla2xxx_check_true,
.tpg_alloc_fabric_acl = tcm_qla2xxx_alloc_fabric_acl,
.tpg_release_fabric_acl = tcm_qla2xxx_release_fabric_acl,
.tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
.release_cmd = tcm_qla2xxx_release_cmd,
.put_session = tcm_qla2xxx_put_session,
.shutdown_session = tcm_qla2xxx_shutdown_session,
.close_session = tcm_qla2xxx_close_session,
.sess_get_index = tcm_qla2xxx_sess_get_index,
.sess_get_initiator_sid = NULL,
.write_pending = tcm_qla2xxx_write_pending,
.write_pending_status = tcm_qla2xxx_write_pending_status,
.set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
.get_task_tag = tcm_qla2xxx_get_task_tag,
.get_cmd_state = tcm_qla2xxx_get_cmd_state,
.queue_data_in = tcm_qla2xxx_queue_data_in,
.queue_status = tcm_qla2xxx_queue_status,
.queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
.get_fabric_sense_len = tcm_qla2xxx_get_fabric_sense_len,
.set_fabric_sense_len = tcm_qla2xxx_set_fabric_sense_len,
/*
* Setup function pointers for generic logic in
* target_core_fabric_configfs.c
*/
.fabric_make_wwn = tcm_qla2xxx_npiv_make_lport,
.fabric_drop_wwn = tcm_qla2xxx_npiv_drop_lport,
.fabric_make_tpg = tcm_qla2xxx_npiv_make_tpg,
.fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
.fabric_post_link = NULL,
.fabric_pre_unlink = NULL,
.fabric_make_np = NULL,
.fabric_drop_np = NULL,
.fabric_make_nodeacl = tcm_qla2xxx_make_nodeacl,
.fabric_drop_nodeacl = tcm_qla2xxx_drop_nodeacl,
};
static int tcm_qla2xxx_register_configfs(void)
{
struct target_fabric_configfs *fabric, *npiv_fabric;
int ret;
pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s"
" on "UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
utsname()->machine);
/*
* Register the top level struct config_item_type with TCM core
*/
fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx");
if (IS_ERR(fabric)) {
pr_err("target_fabric_configfs_init() failed\n");
return PTR_ERR(fabric);
}
/*
* Setup fabric->tf_ops from our local tcm_qla2xxx_ops
*/
fabric->tf_ops = tcm_qla2xxx_ops;
/*
* Setup default attribute lists for various fabric->tf_cit_tmpl
*/
TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_qla2xxx_tpg_attrs;
TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs =
tcm_qla2xxx_tpg_attrib_attrs;
TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
/*
* Register the fabric for use within TCM
*/
ret = target_fabric_configfs_register(fabric);
if (ret < 0) {
pr_err("target_fabric_configfs_register() failed"
" for TCM_QLA2XXX\n");
return ret;
}
/*
* Setup our local pointer to *fabric
*/
tcm_qla2xxx_fabric_configfs = fabric;
pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_fabric_configfs\n");
/*
* Register the top level struct config_item_type for NPIV with TCM core
*/
npiv_fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx_npiv");
if (IS_ERR(npiv_fabric)) {
pr_err("target_fabric_configfs_init() failed\n");
ret = PTR_ERR(npiv_fabric);
goto out_fabric;
}
/*
* Setup fabric->tf_ops from our local tcm_qla2xxx_npiv_ops
*/
npiv_fabric->tf_ops = tcm_qla2xxx_npiv_ops;
/*
* Setup default attribute lists for various npiv_fabric->tf_cit_tmpl
*/
TF_CIT_TMPL(npiv_fabric)->tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_base_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
/*
* Register the npiv_fabric for use within TCM
*/
ret = target_fabric_configfs_register(npiv_fabric);
if (ret < 0) {
pr_err("target_fabric_configfs_register() failed"
" for TCM_QLA2XXX\n");
goto out_fabric;
}
/*
* Setup our local pointer to *npiv_fabric
*/
tcm_qla2xxx_npiv_fabric_configfs = npiv_fabric;
pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_npiv_fabric_configfs\n");
tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
WQ_MEM_RECLAIM, 0);
if (!tcm_qla2xxx_free_wq) {
ret = -ENOMEM;
goto out_fabric_npiv;
}
tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
if (!tcm_qla2xxx_cmd_wq) {
ret = -ENOMEM;
goto out_free_wq;
}
return 0;
out_free_wq:
destroy_workqueue(tcm_qla2xxx_free_wq);
out_fabric_npiv:
target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
out_fabric:
target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
return ret;
}
static void tcm_qla2xxx_deregister_configfs(void)
{
destroy_workqueue(tcm_qla2xxx_cmd_wq);
destroy_workqueue(tcm_qla2xxx_free_wq);
target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
tcm_qla2xxx_fabric_configfs = NULL;
pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_fabric_configfs\n");
target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
tcm_qla2xxx_npiv_fabric_configfs = NULL;
pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_npiv_fabric_configfs\n");
}
static int __init tcm_qla2xxx_init(void)
{
int ret;
ret = tcm_qla2xxx_register_configfs();
if (ret < 0)
return ret;
return 0;
}
static void __exit tcm_qla2xxx_exit(void)
{
tcm_qla2xxx_deregister_configfs();
}
MODULE_DESCRIPTION("TCM QLA2XXX series NPIV enabled fabric driver");
MODULE_LICENSE("GPL");
module_init(tcm_qla2xxx_init);
module_exit(tcm_qla2xxx_exit);