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![Andy Grover](/assets/img/avatar_default.png)
These functions are not adding or deleting an lport. They are adding a wwn that may match with an lport that is present on the system. Renaming ft_del_lport also means we won't have functions named both ft_del_lport and ft_lport_del any more. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
642 lines
16 KiB
C
642 lines
16 KiB
C
/*******************************************************************************
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* Filename: tcm_fc.c
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*
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* This file contains the configfs implementation for TCM_fc fabric node.
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* Based on tcm_loop_configfs.c
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*
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* Copyright (c) 2010 Cisco Systems, Inc.
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* Copyright (c) 2009,2010 Rising Tide, Inc.
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* Copyright (c) 2009,2010 Linux-iSCSI.org
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*
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* Copyright (c) 2009,2010 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 <linux/module.h>
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#include <linux/moduleparam.h>
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#include <generated/utsrelease.h>
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#include <linux/utsname.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/kthread.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/configfs.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <asm/unaligned.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/libfc.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/target_core_fabric_configfs.h>
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#include <target/target_core_configfs.h>
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#include <target/configfs_macros.h>
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#include "tcm_fc.h"
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struct target_fabric_configfs *ft_configfs;
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static LIST_HEAD(ft_wwn_list);
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DEFINE_MUTEX(ft_lport_lock);
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unsigned int ft_debug_logging;
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module_param_named(debug_logging, ft_debug_logging, int, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
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/*
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* Parse WWN.
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* If strict, we require lower-case hex and colon separators to be sure
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* the name is the same as what would be generated by ft_format_wwn()
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* so the name and wwn are mapped one-to-one.
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*/
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static ssize_t ft_parse_wwn(const char *name, u64 *wwn, int strict)
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{
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const char *cp;
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char c;
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u32 byte = 0;
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u32 pos = 0;
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u32 err;
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int val;
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*wwn = 0;
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for (cp = name; cp < &name[FT_NAMELEN - 1]; cp++) {
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c = *cp;
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if (c == '\n' && cp[1] == '\0')
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continue;
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if (strict && pos++ == 2 && byte++ < 7) {
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pos = 0;
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if (c == ':')
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continue;
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err = 1;
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goto fail;
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}
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if (c == '\0') {
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err = 2;
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if (strict && byte != 8)
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goto fail;
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return cp - name;
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}
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err = 3;
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val = hex_to_bin(c);
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if (val < 0 || (strict && isupper(c)))
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goto fail;
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*wwn = (*wwn << 4) | val;
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}
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err = 4;
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fail:
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pr_debug("err %u len %zu pos %u byte %u\n",
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err, cp - name, pos, byte);
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return -1;
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}
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ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn)
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{
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u8 b[8];
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put_unaligned_be64(wwn, b);
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return snprintf(buf, len,
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"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
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b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
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}
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static ssize_t ft_wwn_show(void *arg, char *buf)
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{
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u64 *wwn = arg;
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ssize_t len;
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len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn);
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buf[len++] = '\n';
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return len;
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}
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static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len)
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{
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ssize_t ret;
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u64 wwn;
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ret = ft_parse_wwn(buf, &wwn, 0);
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if (ret > 0)
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*(u64 *)arg = wwn;
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return ret;
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}
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/*
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* ACL auth ops.
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*/
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static ssize_t ft_nacl_show_port_name(
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struct se_node_acl *se_nacl,
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char *page)
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{
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struct ft_node_acl *acl = container_of(se_nacl,
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struct ft_node_acl, se_node_acl);
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return ft_wwn_show(&acl->node_auth.port_name, page);
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}
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static ssize_t ft_nacl_store_port_name(
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struct se_node_acl *se_nacl,
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const char *page,
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size_t count)
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{
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struct ft_node_acl *acl = container_of(se_nacl,
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struct ft_node_acl, se_node_acl);
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return ft_wwn_store(&acl->node_auth.port_name, page, count);
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}
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TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR);
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static ssize_t ft_nacl_show_node_name(
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struct se_node_acl *se_nacl,
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char *page)
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{
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struct ft_node_acl *acl = container_of(se_nacl,
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struct ft_node_acl, se_node_acl);
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return ft_wwn_show(&acl->node_auth.node_name, page);
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}
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static ssize_t ft_nacl_store_node_name(
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struct se_node_acl *se_nacl,
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const char *page,
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size_t count)
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{
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struct ft_node_acl *acl = container_of(se_nacl,
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struct ft_node_acl, se_node_acl);
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return ft_wwn_store(&acl->node_auth.node_name, page, count);
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}
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TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR);
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static struct configfs_attribute *ft_nacl_base_attrs[] = {
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&ft_nacl_port_name.attr,
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&ft_nacl_node_name.attr,
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NULL,
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};
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/*
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* ACL ops.
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*/
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/*
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* Add ACL for an initiator. The ACL is named arbitrarily.
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* The port_name and/or node_name are attributes.
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*/
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static struct se_node_acl *ft_add_acl(
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struct se_portal_group *se_tpg,
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struct config_group *group,
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const char *name)
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{
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struct ft_node_acl *acl;
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struct ft_tpg *tpg;
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u64 wwpn;
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u32 q_depth;
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pr_debug("add acl %s\n", name);
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tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
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if (ft_parse_wwn(name, &wwpn, 1) < 0)
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return ERR_PTR(-EINVAL);
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acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL);
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if (!acl)
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return ERR_PTR(-ENOMEM);
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acl->node_auth.port_name = wwpn;
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q_depth = 32; /* XXX bogus default - get from tpg? */
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return core_tpg_add_initiator_node_acl(&tpg->se_tpg,
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&acl->se_node_acl, name, q_depth);
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}
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static void ft_del_acl(struct se_node_acl *se_acl)
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{
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struct se_portal_group *se_tpg = se_acl->se_tpg;
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struct ft_tpg *tpg;
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struct ft_node_acl *acl = container_of(se_acl,
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struct ft_node_acl, se_node_acl);
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pr_debug("del acl %s\n",
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config_item_name(&se_acl->acl_group.cg_item));
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tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
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pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n",
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acl, se_acl, tpg, &tpg->se_tpg);
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core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1);
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kfree(acl);
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}
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struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata)
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{
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struct ft_node_acl *found = NULL;
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struct ft_node_acl *acl;
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struct se_portal_group *se_tpg = &tpg->se_tpg;
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struct se_node_acl *se_acl;
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spin_lock_irq(&se_tpg->acl_node_lock);
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list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) {
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acl = container_of(se_acl, struct ft_node_acl, se_node_acl);
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pr_debug("acl %p port_name %llx\n",
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acl, (unsigned long long)acl->node_auth.port_name);
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if (acl->node_auth.port_name == rdata->ids.port_name ||
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acl->node_auth.node_name == rdata->ids.node_name) {
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pr_debug("acl %p port_name %llx matched\n", acl,
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(unsigned long long)rdata->ids.port_name);
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found = acl;
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/* XXX need to hold onto ACL */
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break;
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}
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}
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spin_unlock_irq(&se_tpg->acl_node_lock);
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return found;
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}
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static struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg)
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{
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struct ft_node_acl *acl;
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acl = kzalloc(sizeof(*acl), GFP_KERNEL);
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if (!acl) {
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pr_err("Unable to allocate struct ft_node_acl\n");
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return NULL;
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}
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pr_debug("acl %p\n", acl);
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return &acl->se_node_acl;
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}
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static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg,
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struct se_node_acl *se_acl)
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{
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struct ft_node_acl *acl = container_of(se_acl,
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struct ft_node_acl, se_node_acl);
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pr_debug("acl %p\n", acl);
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kfree(acl);
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}
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/*
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* local_port port_group (tpg) ops.
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*/
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static struct se_portal_group *ft_add_tpg(
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struct se_wwn *wwn,
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struct config_group *group,
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const char *name)
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{
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struct ft_lport_wwn *ft_wwn;
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struct ft_tpg *tpg;
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struct workqueue_struct *wq;
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unsigned long index;
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int ret;
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pr_debug("tcm_fc: add tpg %s\n", name);
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/*
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* Name must be "tpgt_" followed by the index.
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*/
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if (strstr(name, "tpgt_") != name)
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return NULL;
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ret = kstrtoul(name + 5, 10, &index);
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if (ret)
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return NULL;
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if (index > UINT_MAX)
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return NULL;
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if ((index != 1)) {
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pr_err("Error, a single TPG=1 is used for HW port mappings\n");
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return ERR_PTR(-ENOSYS);
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}
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ft_wwn = container_of(wwn, struct ft_lport_wwn, se_wwn);
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tpg = kzalloc(sizeof(*tpg), GFP_KERNEL);
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if (!tpg)
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return NULL;
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tpg->index = index;
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tpg->lport_wwn = ft_wwn;
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INIT_LIST_HEAD(&tpg->lun_list);
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wq = alloc_workqueue("tcm_fc", 0, 1);
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if (!wq) {
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kfree(tpg);
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return NULL;
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}
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ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg,
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tpg, TRANSPORT_TPG_TYPE_NORMAL);
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if (ret < 0) {
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destroy_workqueue(wq);
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kfree(tpg);
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return NULL;
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}
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tpg->workqueue = wq;
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mutex_lock(&ft_lport_lock);
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ft_wwn->tpg = tpg;
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mutex_unlock(&ft_lport_lock);
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return &tpg->se_tpg;
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}
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static void ft_del_tpg(struct se_portal_group *se_tpg)
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{
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struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
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struct ft_lport_wwn *ft_wwn = tpg->lport_wwn;
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pr_debug("del tpg %s\n",
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config_item_name(&tpg->se_tpg.tpg_group.cg_item));
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destroy_workqueue(tpg->workqueue);
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/* Wait for sessions to be freed thru RCU, for BUG_ON below */
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synchronize_rcu();
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mutex_lock(&ft_lport_lock);
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ft_wwn->tpg = NULL;
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if (tpg->tport) {
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tpg->tport->tpg = NULL;
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tpg->tport = NULL;
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}
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mutex_unlock(&ft_lport_lock);
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core_tpg_deregister(se_tpg);
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kfree(tpg);
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}
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/*
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* Verify that an lport is configured to use the tcm_fc module, and return
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* the target port group that should be used.
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*
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* The caller holds ft_lport_lock.
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*/
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struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport)
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{
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struct ft_lport_wwn *ft_wwn;
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list_for_each_entry(ft_wwn, &ft_wwn_list, ft_wwn_node) {
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if (ft_wwn->wwpn == lport->wwpn)
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return ft_wwn->tpg;
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}
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return NULL;
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}
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/*
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* target config instance ops.
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*/
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/*
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* Add lport to allowed config.
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* The name is the WWPN in lower-case ASCII, colon-separated bytes.
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*/
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static struct se_wwn *ft_add_wwn(
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struct target_fabric_configfs *tf,
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struct config_group *group,
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const char *name)
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{
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struct ft_lport_wwn *ft_wwn;
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struct ft_lport_wwn *old_ft_wwn;
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u64 wwpn;
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pr_debug("add wwn %s\n", name);
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if (ft_parse_wwn(name, &wwpn, 1) < 0)
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return NULL;
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ft_wwn = kzalloc(sizeof(*ft_wwn), GFP_KERNEL);
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if (!ft_wwn)
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return NULL;
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ft_wwn->wwpn = wwpn;
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mutex_lock(&ft_lport_lock);
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list_for_each_entry(old_ft_wwn, &ft_wwn_list, ft_wwn_node) {
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if (old_ft_wwn->wwpn == wwpn) {
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mutex_unlock(&ft_lport_lock);
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kfree(ft_wwn);
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return NULL;
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}
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}
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list_add_tail(&ft_wwn->ft_wwn_node, &ft_wwn_list);
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ft_format_wwn(ft_wwn->name, sizeof(ft_wwn->name), wwpn);
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mutex_unlock(&ft_lport_lock);
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return &ft_wwn->se_wwn;
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}
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static void ft_del_wwn(struct se_wwn *wwn)
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{
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struct ft_lport_wwn *ft_wwn = container_of(wwn,
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struct ft_lport_wwn, se_wwn);
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pr_debug("del wwn %s\n", ft_wwn->name);
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mutex_lock(&ft_lport_lock);
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list_del(&ft_wwn->ft_wwn_node);
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mutex_unlock(&ft_lport_lock);
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kfree(ft_wwn);
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}
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static ssize_t ft_wwn_show_attr_version(
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struct target_fabric_configfs *tf,
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char *page)
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{
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return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on "
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""UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
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}
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TF_WWN_ATTR_RO(ft, version);
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static struct configfs_attribute *ft_wwn_attrs[] = {
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&ft_wwn_version.attr,
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NULL,
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};
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static char *ft_get_fabric_name(void)
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{
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return "fc";
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}
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static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg)
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{
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struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
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return tpg->lport_wwn->name;
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}
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static u16 ft_get_tag(struct se_portal_group *se_tpg)
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{
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struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
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/*
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* This tag is used when forming SCSI Name identifier in EVPD=1 0x83
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* to represent the SCSI Target Port.
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*/
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return tpg->index;
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}
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static u32 ft_get_default_depth(struct se_portal_group *se_tpg)
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{
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return 1;
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}
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|
|
|
static int ft_check_false(struct se_portal_group *se_tpg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void ft_set_default_node_attr(struct se_node_acl *se_nacl)
|
|
{
|
|
}
|
|
|
|
static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg)
|
|
{
|
|
struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
|
|
|
|
return tpg->index;
|
|
}
|
|
|
|
static struct target_core_fabric_ops ft_fabric_ops = {
|
|
.get_fabric_name = ft_get_fabric_name,
|
|
.get_fabric_proto_ident = fc_get_fabric_proto_ident,
|
|
.tpg_get_wwn = ft_get_fabric_wwn,
|
|
.tpg_get_tag = ft_get_tag,
|
|
.tpg_get_default_depth = ft_get_default_depth,
|
|
.tpg_get_pr_transport_id = fc_get_pr_transport_id,
|
|
.tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len,
|
|
.tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id,
|
|
.tpg_check_demo_mode = ft_check_false,
|
|
.tpg_check_demo_mode_cache = ft_check_false,
|
|
.tpg_check_demo_mode_write_protect = ft_check_false,
|
|
.tpg_check_prod_mode_write_protect = ft_check_false,
|
|
.tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl,
|
|
.tpg_release_fabric_acl = ft_tpg_release_fabric_acl,
|
|
.tpg_get_inst_index = ft_tpg_get_inst_index,
|
|
.check_stop_free = ft_check_stop_free,
|
|
.release_cmd = ft_release_cmd,
|
|
.shutdown_session = ft_sess_shutdown,
|
|
.close_session = ft_sess_close,
|
|
.sess_get_index = ft_sess_get_index,
|
|
.sess_get_initiator_sid = NULL,
|
|
.write_pending = ft_write_pending,
|
|
.write_pending_status = ft_write_pending_status,
|
|
.set_default_node_attributes = ft_set_default_node_attr,
|
|
.get_task_tag = ft_get_task_tag,
|
|
.get_cmd_state = ft_get_cmd_state,
|
|
.queue_data_in = ft_queue_data_in,
|
|
.queue_status = ft_queue_status,
|
|
.queue_tm_rsp = ft_queue_tm_resp,
|
|
.aborted_task = ft_aborted_task,
|
|
/*
|
|
* Setup function pointers for generic logic in
|
|
* target_core_fabric_configfs.c
|
|
*/
|
|
.fabric_make_wwn = &ft_add_wwn,
|
|
.fabric_drop_wwn = &ft_del_wwn,
|
|
.fabric_make_tpg = &ft_add_tpg,
|
|
.fabric_drop_tpg = &ft_del_tpg,
|
|
.fabric_post_link = NULL,
|
|
.fabric_pre_unlink = NULL,
|
|
.fabric_make_np = NULL,
|
|
.fabric_drop_np = NULL,
|
|
.fabric_make_nodeacl = &ft_add_acl,
|
|
.fabric_drop_nodeacl = &ft_del_acl,
|
|
};
|
|
|
|
static int ft_register_configfs(void)
|
|
{
|
|
struct target_fabric_configfs *fabric;
|
|
int ret;
|
|
|
|
/*
|
|
* Register the top level struct config_item_type with TCM core
|
|
*/
|
|
fabric = target_fabric_configfs_init(THIS_MODULE, "fc");
|
|
if (IS_ERR(fabric)) {
|
|
pr_err("%s: target_fabric_configfs_init() failed!\n",
|
|
__func__);
|
|
return PTR_ERR(fabric);
|
|
}
|
|
fabric->tf_ops = ft_fabric_ops;
|
|
|
|
/*
|
|
* Setup default attribute lists for various fabric->tf_cit_tmpl
|
|
*/
|
|
fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = ft_wwn_attrs;
|
|
fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = NULL;
|
|
fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
|
|
fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
|
|
fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
|
|
fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs =
|
|
ft_nacl_base_attrs;
|
|
fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
|
|
fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
|
|
fabric->tf_cit_tmpl.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_debug("target_fabric_configfs_register() for"
|
|
" FC Target failed!\n");
|
|
target_fabric_configfs_free(fabric);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Setup our local pointer to *fabric.
|
|
*/
|
|
ft_configfs = fabric;
|
|
return 0;
|
|
}
|
|
|
|
static void ft_deregister_configfs(void)
|
|
{
|
|
if (!ft_configfs)
|
|
return;
|
|
target_fabric_configfs_deregister(ft_configfs);
|
|
ft_configfs = NULL;
|
|
}
|
|
|
|
static struct notifier_block ft_notifier = {
|
|
.notifier_call = ft_lport_notify
|
|
};
|
|
|
|
static int __init ft_init(void)
|
|
{
|
|
if (ft_register_configfs())
|
|
return -1;
|
|
if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) {
|
|
ft_deregister_configfs();
|
|
return -1;
|
|
}
|
|
blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier);
|
|
fc_lport_iterate(ft_lport_add, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ft_exit(void)
|
|
{
|
|
blocking_notifier_chain_unregister(&fc_lport_notifier_head,
|
|
&ft_notifier);
|
|
fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov);
|
|
fc_lport_iterate(ft_lport_del, NULL);
|
|
ft_deregister_configfs();
|
|
synchronize_rcu();
|
|
}
|
|
|
|
MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
module_init(ft_init);
|
|
module_exit(ft_exit);
|