1337 lines
32 KiB
C
1337 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Configfs interface for the NVMe target.
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* Copyright (c) 2015-2016 HGST, a Western Digital Company.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/ctype.h>
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#include <linux/pci.h>
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#include <linux/pci-p2pdma.h>
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#include "nvmet.h"
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static const struct config_item_type nvmet_host_type;
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static const struct config_item_type nvmet_subsys_type;
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static LIST_HEAD(nvmet_ports_list);
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struct list_head *nvmet_ports = &nvmet_ports_list;
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static const struct nvmet_transport_name {
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u8 type;
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const char *name;
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} nvmet_transport_names[] = {
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{ NVMF_TRTYPE_RDMA, "rdma" },
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{ NVMF_TRTYPE_FC, "fc" },
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{ NVMF_TRTYPE_TCP, "tcp" },
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{ NVMF_TRTYPE_LOOP, "loop" },
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};
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/*
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* nvmet_port Generic ConfigFS definitions.
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* Used in any place in the ConfigFS tree that refers to an address.
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*/
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static ssize_t nvmet_addr_adrfam_show(struct config_item *item,
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char *page)
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{
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switch (to_nvmet_port(item)->disc_addr.adrfam) {
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case NVMF_ADDR_FAMILY_IP4:
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return sprintf(page, "ipv4\n");
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case NVMF_ADDR_FAMILY_IP6:
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return sprintf(page, "ipv6\n");
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case NVMF_ADDR_FAMILY_IB:
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return sprintf(page, "ib\n");
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case NVMF_ADDR_FAMILY_FC:
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return sprintf(page, "fc\n");
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default:
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return sprintf(page, "\n");
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}
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}
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static ssize_t nvmet_addr_adrfam_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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if (port->enabled) {
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pr_err("Cannot modify address while enabled\n");
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pr_err("Disable the address before modifying\n");
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return -EACCES;
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}
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if (sysfs_streq(page, "ipv4")) {
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port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP4;
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} else if (sysfs_streq(page, "ipv6")) {
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port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP6;
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} else if (sysfs_streq(page, "ib")) {
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port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IB;
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} else if (sysfs_streq(page, "fc")) {
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port->disc_addr.adrfam = NVMF_ADDR_FAMILY_FC;
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} else {
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pr_err("Invalid value '%s' for adrfam\n", page);
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return -EINVAL;
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}
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return count;
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}
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CONFIGFS_ATTR(nvmet_, addr_adrfam);
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static ssize_t nvmet_addr_portid_show(struct config_item *item,
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char *page)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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return snprintf(page, PAGE_SIZE, "%d\n",
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le16_to_cpu(port->disc_addr.portid));
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}
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static ssize_t nvmet_addr_portid_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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u16 portid = 0;
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if (kstrtou16(page, 0, &portid)) {
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pr_err("Invalid value '%s' for portid\n", page);
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return -EINVAL;
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}
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if (port->enabled) {
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pr_err("Cannot modify address while enabled\n");
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pr_err("Disable the address before modifying\n");
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return -EACCES;
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}
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port->disc_addr.portid = cpu_to_le16(portid);
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return count;
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}
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CONFIGFS_ATTR(nvmet_, addr_portid);
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static ssize_t nvmet_addr_traddr_show(struct config_item *item,
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char *page)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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return snprintf(page, PAGE_SIZE, "%s\n",
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port->disc_addr.traddr);
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}
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static ssize_t nvmet_addr_traddr_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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if (count > NVMF_TRADDR_SIZE) {
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pr_err("Invalid value '%s' for traddr\n", page);
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return -EINVAL;
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}
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if (port->enabled) {
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pr_err("Cannot modify address while enabled\n");
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pr_err("Disable the address before modifying\n");
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return -EACCES;
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}
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if (sscanf(page, "%s\n", port->disc_addr.traddr) != 1)
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return -EINVAL;
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return count;
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}
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CONFIGFS_ATTR(nvmet_, addr_traddr);
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static ssize_t nvmet_addr_treq_show(struct config_item *item,
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char *page)
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{
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switch (to_nvmet_port(item)->disc_addr.treq &
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NVME_TREQ_SECURE_CHANNEL_MASK) {
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case NVMF_TREQ_NOT_SPECIFIED:
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return sprintf(page, "not specified\n");
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case NVMF_TREQ_REQUIRED:
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return sprintf(page, "required\n");
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case NVMF_TREQ_NOT_REQUIRED:
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return sprintf(page, "not required\n");
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default:
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return sprintf(page, "\n");
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}
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}
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static ssize_t nvmet_addr_treq_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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u8 treq = port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK;
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if (port->enabled) {
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pr_err("Cannot modify address while enabled\n");
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pr_err("Disable the address before modifying\n");
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return -EACCES;
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}
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if (sysfs_streq(page, "not specified")) {
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treq |= NVMF_TREQ_NOT_SPECIFIED;
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} else if (sysfs_streq(page, "required")) {
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treq |= NVMF_TREQ_REQUIRED;
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} else if (sysfs_streq(page, "not required")) {
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treq |= NVMF_TREQ_NOT_REQUIRED;
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} else {
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pr_err("Invalid value '%s' for treq\n", page);
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return -EINVAL;
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}
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port->disc_addr.treq = treq;
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return count;
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}
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CONFIGFS_ATTR(nvmet_, addr_treq);
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static ssize_t nvmet_addr_trsvcid_show(struct config_item *item,
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char *page)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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return snprintf(page, PAGE_SIZE, "%s\n",
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port->disc_addr.trsvcid);
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}
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static ssize_t nvmet_addr_trsvcid_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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if (count > NVMF_TRSVCID_SIZE) {
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pr_err("Invalid value '%s' for trsvcid\n", page);
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return -EINVAL;
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}
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if (port->enabled) {
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pr_err("Cannot modify address while enabled\n");
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pr_err("Disable the address before modifying\n");
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return -EACCES;
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}
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if (sscanf(page, "%s\n", port->disc_addr.trsvcid) != 1)
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return -EINVAL;
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return count;
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}
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CONFIGFS_ATTR(nvmet_, addr_trsvcid);
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static ssize_t nvmet_param_inline_data_size_show(struct config_item *item,
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char *page)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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return snprintf(page, PAGE_SIZE, "%d\n", port->inline_data_size);
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}
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static ssize_t nvmet_param_inline_data_size_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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int ret;
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if (port->enabled) {
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pr_err("Cannot modify inline_data_size while port enabled\n");
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pr_err("Disable the port before modifying\n");
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return -EACCES;
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}
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ret = kstrtoint(page, 0, &port->inline_data_size);
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if (ret) {
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pr_err("Invalid value '%s' for inline_data_size\n", page);
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return -EINVAL;
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}
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return count;
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}
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CONFIGFS_ATTR(nvmet_, param_inline_data_size);
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static ssize_t nvmet_addr_trtype_show(struct config_item *item,
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char *page)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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int i;
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for (i = 0; i < ARRAY_SIZE(nvmet_transport_names); i++) {
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if (port->disc_addr.trtype != nvmet_transport_names[i].type)
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continue;
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return sprintf(page, "%s\n", nvmet_transport_names[i].name);
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}
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return sprintf(page, "\n");
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}
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static void nvmet_port_init_tsas_rdma(struct nvmet_port *port)
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{
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port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED;
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port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED;
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port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM;
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}
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static ssize_t nvmet_addr_trtype_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_port *port = to_nvmet_port(item);
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int i;
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if (port->enabled) {
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pr_err("Cannot modify address while enabled\n");
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pr_err("Disable the address before modifying\n");
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return -EACCES;
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}
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for (i = 0; i < ARRAY_SIZE(nvmet_transport_names); i++) {
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if (sysfs_streq(page, nvmet_transport_names[i].name))
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goto found;
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}
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pr_err("Invalid value '%s' for trtype\n", page);
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return -EINVAL;
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found:
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memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE);
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port->disc_addr.trtype = nvmet_transport_names[i].type;
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if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA)
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nvmet_port_init_tsas_rdma(port);
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return count;
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}
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CONFIGFS_ATTR(nvmet_, addr_trtype);
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/*
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* Namespace structures & file operation functions below
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*/
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static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%s\n", to_nvmet_ns(item)->device_path);
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}
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static ssize_t nvmet_ns_device_path_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_ns *ns = to_nvmet_ns(item);
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struct nvmet_subsys *subsys = ns->subsys;
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size_t len;
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int ret;
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mutex_lock(&subsys->lock);
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ret = -EBUSY;
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if (ns->enabled)
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goto out_unlock;
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ret = -EINVAL;
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len = strcspn(page, "\n");
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if (!len)
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goto out_unlock;
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kfree(ns->device_path);
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ret = -ENOMEM;
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ns->device_path = kstrndup(page, len, GFP_KERNEL);
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if (!ns->device_path)
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goto out_unlock;
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mutex_unlock(&subsys->lock);
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return count;
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out_unlock:
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mutex_unlock(&subsys->lock);
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return ret;
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}
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CONFIGFS_ATTR(nvmet_ns_, device_path);
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#ifdef CONFIG_PCI_P2PDMA
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static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page)
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{
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struct nvmet_ns *ns = to_nvmet_ns(item);
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return pci_p2pdma_enable_show(page, ns->p2p_dev, ns->use_p2pmem);
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}
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static ssize_t nvmet_ns_p2pmem_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_ns *ns = to_nvmet_ns(item);
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struct pci_dev *p2p_dev = NULL;
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bool use_p2pmem;
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int ret = count;
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int error;
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mutex_lock(&ns->subsys->lock);
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if (ns->enabled) {
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ret = -EBUSY;
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goto out_unlock;
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}
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error = pci_p2pdma_enable_store(page, &p2p_dev, &use_p2pmem);
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if (error) {
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ret = error;
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goto out_unlock;
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}
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ns->use_p2pmem = use_p2pmem;
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pci_dev_put(ns->p2p_dev);
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ns->p2p_dev = p2p_dev;
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out_unlock:
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mutex_unlock(&ns->subsys->lock);
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return ret;
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}
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CONFIGFS_ATTR(nvmet_ns_, p2pmem);
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#endif /* CONFIG_PCI_P2PDMA */
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static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid);
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}
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static ssize_t nvmet_ns_device_uuid_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_ns *ns = to_nvmet_ns(item);
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struct nvmet_subsys *subsys = ns->subsys;
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int ret = 0;
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mutex_lock(&subsys->lock);
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if (ns->enabled) {
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ret = -EBUSY;
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goto out_unlock;
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}
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if (uuid_parse(page, &ns->uuid))
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ret = -EINVAL;
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out_unlock:
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mutex_unlock(&subsys->lock);
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return ret ? ret : count;
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}
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CONFIGFS_ATTR(nvmet_ns_, device_uuid);
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static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid);
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}
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static ssize_t nvmet_ns_device_nguid_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_ns *ns = to_nvmet_ns(item);
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struct nvmet_subsys *subsys = ns->subsys;
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u8 nguid[16];
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const char *p = page;
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int i;
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int ret = 0;
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mutex_lock(&subsys->lock);
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if (ns->enabled) {
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ret = -EBUSY;
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goto out_unlock;
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}
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for (i = 0; i < 16; i++) {
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if (p + 2 > page + count) {
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ret = -EINVAL;
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goto out_unlock;
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}
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if (!isxdigit(p[0]) || !isxdigit(p[1])) {
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ret = -EINVAL;
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goto out_unlock;
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}
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nguid[i] = (hex_to_bin(p[0]) << 4) | hex_to_bin(p[1]);
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p += 2;
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if (*p == '-' || *p == ':')
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p++;
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}
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memcpy(&ns->nguid, nguid, sizeof(nguid));
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out_unlock:
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mutex_unlock(&subsys->lock);
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return ret ? ret : count;
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}
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CONFIGFS_ATTR(nvmet_ns_, device_nguid);
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|
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static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%u\n", to_nvmet_ns(item)->anagrpid);
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}
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|
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static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item,
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const char *page, size_t count)
|
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{
|
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struct nvmet_ns *ns = to_nvmet_ns(item);
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u32 oldgrpid, newgrpid;
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int ret;
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ret = kstrtou32(page, 0, &newgrpid);
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if (ret)
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return ret;
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|
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if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS)
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return -EINVAL;
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|
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down_write(&nvmet_ana_sem);
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oldgrpid = ns->anagrpid;
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nvmet_ana_group_enabled[newgrpid]++;
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ns->anagrpid = newgrpid;
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nvmet_ana_group_enabled[oldgrpid]--;
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nvmet_ana_chgcnt++;
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up_write(&nvmet_ana_sem);
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nvmet_send_ana_event(ns->subsys, NULL);
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return count;
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}
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|
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CONFIGFS_ATTR(nvmet_ns_, ana_grpid);
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|
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static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%d\n", to_nvmet_ns(item)->enabled);
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}
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|
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static ssize_t nvmet_ns_enable_store(struct config_item *item,
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const char *page, size_t count)
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{
|
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struct nvmet_ns *ns = to_nvmet_ns(item);
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bool enable;
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int ret = 0;
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|
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if (strtobool(page, &enable))
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return -EINVAL;
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|
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if (enable)
|
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ret = nvmet_ns_enable(ns);
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else
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|
nvmet_ns_disable(ns);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
CONFIGFS_ATTR(nvmet_ns_, enable);
|
|
|
|
static ssize_t nvmet_ns_buffered_io_show(struct config_item *item, char *page)
|
|
{
|
|
return sprintf(page, "%d\n", to_nvmet_ns(item)->buffered_io);
|
|
}
|
|
|
|
static ssize_t nvmet_ns_buffered_io_store(struct config_item *item,
|
|
const char *page, size_t count)
|
|
{
|
|
struct nvmet_ns *ns = to_nvmet_ns(item);
|
|
bool val;
|
|
|
|
if (strtobool(page, &val))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&ns->subsys->lock);
|
|
if (ns->enabled) {
|
|
pr_err("disable ns before setting buffered_io value.\n");
|
|
mutex_unlock(&ns->subsys->lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ns->buffered_io = val;
|
|
mutex_unlock(&ns->subsys->lock);
|
|
return count;
|
|
}
|
|
|
|
CONFIGFS_ATTR(nvmet_ns_, buffered_io);
|
|
|
|
static struct configfs_attribute *nvmet_ns_attrs[] = {
|
|
&nvmet_ns_attr_device_path,
|
|
&nvmet_ns_attr_device_nguid,
|
|
&nvmet_ns_attr_device_uuid,
|
|
&nvmet_ns_attr_ana_grpid,
|
|
&nvmet_ns_attr_enable,
|
|
&nvmet_ns_attr_buffered_io,
|
|
#ifdef CONFIG_PCI_P2PDMA
|
|
&nvmet_ns_attr_p2pmem,
|
|
#endif
|
|
NULL,
|
|
};
|
|
|
|
static void nvmet_ns_release(struct config_item *item)
|
|
{
|
|
struct nvmet_ns *ns = to_nvmet_ns(item);
|
|
|
|
nvmet_ns_free(ns);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_ns_item_ops = {
|
|
.release = nvmet_ns_release,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_ns_type = {
|
|
.ct_item_ops = &nvmet_ns_item_ops,
|
|
.ct_attrs = nvmet_ns_attrs,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group *nvmet_ns_make(struct config_group *group,
|
|
const char *name)
|
|
{
|
|
struct nvmet_subsys *subsys = namespaces_to_subsys(&group->cg_item);
|
|
struct nvmet_ns *ns;
|
|
int ret;
|
|
u32 nsid;
|
|
|
|
ret = kstrtou32(name, 0, &nsid);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
if (nsid == 0 || nsid == NVME_NSID_ALL)
|
|
goto out;
|
|
|
|
ret = -ENOMEM;
|
|
ns = nvmet_ns_alloc(subsys, nsid);
|
|
if (!ns)
|
|
goto out;
|
|
config_group_init_type_name(&ns->group, name, &nvmet_ns_type);
|
|
|
|
pr_info("adding nsid %d to subsystem %s\n", nsid, subsys->subsysnqn);
|
|
|
|
return &ns->group;
|
|
out:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct configfs_group_operations nvmet_namespaces_group_ops = {
|
|
.make_group = nvmet_ns_make,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_namespaces_type = {
|
|
.ct_group_ops = &nvmet_namespaces_group_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static int nvmet_port_subsys_allow_link(struct config_item *parent,
|
|
struct config_item *target)
|
|
{
|
|
struct nvmet_port *port = to_nvmet_port(parent->ci_parent);
|
|
struct nvmet_subsys *subsys;
|
|
struct nvmet_subsys_link *link, *p;
|
|
int ret;
|
|
|
|
if (target->ci_type != &nvmet_subsys_type) {
|
|
pr_err("can only link subsystems into the subsystems dir.!\n");
|
|
return -EINVAL;
|
|
}
|
|
subsys = to_subsys(target);
|
|
link = kmalloc(sizeof(*link), GFP_KERNEL);
|
|
if (!link)
|
|
return -ENOMEM;
|
|
link->subsys = subsys;
|
|
|
|
down_write(&nvmet_config_sem);
|
|
ret = -EEXIST;
|
|
list_for_each_entry(p, &port->subsystems, entry) {
|
|
if (p->subsys == subsys)
|
|
goto out_free_link;
|
|
}
|
|
|
|
if (list_empty(&port->subsystems)) {
|
|
ret = nvmet_enable_port(port);
|
|
if (ret)
|
|
goto out_free_link;
|
|
}
|
|
|
|
list_add_tail(&link->entry, &port->subsystems);
|
|
nvmet_port_disc_changed(port, subsys);
|
|
|
|
up_write(&nvmet_config_sem);
|
|
return 0;
|
|
|
|
out_free_link:
|
|
up_write(&nvmet_config_sem);
|
|
kfree(link);
|
|
return ret;
|
|
}
|
|
|
|
static void nvmet_port_subsys_drop_link(struct config_item *parent,
|
|
struct config_item *target)
|
|
{
|
|
struct nvmet_port *port = to_nvmet_port(parent->ci_parent);
|
|
struct nvmet_subsys *subsys = to_subsys(target);
|
|
struct nvmet_subsys_link *p;
|
|
|
|
down_write(&nvmet_config_sem);
|
|
list_for_each_entry(p, &port->subsystems, entry) {
|
|
if (p->subsys == subsys)
|
|
goto found;
|
|
}
|
|
up_write(&nvmet_config_sem);
|
|
return;
|
|
|
|
found:
|
|
list_del(&p->entry);
|
|
nvmet_port_disc_changed(port, subsys);
|
|
|
|
if (list_empty(&port->subsystems))
|
|
nvmet_disable_port(port);
|
|
up_write(&nvmet_config_sem);
|
|
kfree(p);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_port_subsys_item_ops = {
|
|
.allow_link = nvmet_port_subsys_allow_link,
|
|
.drop_link = nvmet_port_subsys_drop_link,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_port_subsys_type = {
|
|
.ct_item_ops = &nvmet_port_subsys_item_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static int nvmet_allowed_hosts_allow_link(struct config_item *parent,
|
|
struct config_item *target)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(parent->ci_parent);
|
|
struct nvmet_host *host;
|
|
struct nvmet_host_link *link, *p;
|
|
int ret;
|
|
|
|
if (target->ci_type != &nvmet_host_type) {
|
|
pr_err("can only link hosts into the allowed_hosts directory!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
host = to_host(target);
|
|
link = kmalloc(sizeof(*link), GFP_KERNEL);
|
|
if (!link)
|
|
return -ENOMEM;
|
|
link->host = host;
|
|
|
|
down_write(&nvmet_config_sem);
|
|
ret = -EINVAL;
|
|
if (subsys->allow_any_host) {
|
|
pr_err("can't add hosts when allow_any_host is set!\n");
|
|
goto out_free_link;
|
|
}
|
|
|
|
ret = -EEXIST;
|
|
list_for_each_entry(p, &subsys->hosts, entry) {
|
|
if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host)))
|
|
goto out_free_link;
|
|
}
|
|
list_add_tail(&link->entry, &subsys->hosts);
|
|
nvmet_subsys_disc_changed(subsys, host);
|
|
|
|
up_write(&nvmet_config_sem);
|
|
return 0;
|
|
out_free_link:
|
|
up_write(&nvmet_config_sem);
|
|
kfree(link);
|
|
return ret;
|
|
}
|
|
|
|
static void nvmet_allowed_hosts_drop_link(struct config_item *parent,
|
|
struct config_item *target)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(parent->ci_parent);
|
|
struct nvmet_host *host = to_host(target);
|
|
struct nvmet_host_link *p;
|
|
|
|
down_write(&nvmet_config_sem);
|
|
list_for_each_entry(p, &subsys->hosts, entry) {
|
|
if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host)))
|
|
goto found;
|
|
}
|
|
up_write(&nvmet_config_sem);
|
|
return;
|
|
|
|
found:
|
|
list_del(&p->entry);
|
|
nvmet_subsys_disc_changed(subsys, host);
|
|
|
|
up_write(&nvmet_config_sem);
|
|
kfree(p);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_allowed_hosts_item_ops = {
|
|
.allow_link = nvmet_allowed_hosts_allow_link,
|
|
.drop_link = nvmet_allowed_hosts_drop_link,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_allowed_hosts_type = {
|
|
.ct_item_ops = &nvmet_allowed_hosts_item_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item,
|
|
char *page)
|
|
{
|
|
return snprintf(page, PAGE_SIZE, "%d\n",
|
|
to_subsys(item)->allow_any_host);
|
|
}
|
|
|
|
static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item,
|
|
const char *page, size_t count)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(item);
|
|
bool allow_any_host;
|
|
int ret = 0;
|
|
|
|
if (strtobool(page, &allow_any_host))
|
|
return -EINVAL;
|
|
|
|
down_write(&nvmet_config_sem);
|
|
if (allow_any_host && !list_empty(&subsys->hosts)) {
|
|
pr_err("Can't set allow_any_host when explicit hosts are set!\n");
|
|
ret = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (subsys->allow_any_host != allow_any_host) {
|
|
subsys->allow_any_host = allow_any_host;
|
|
nvmet_subsys_disc_changed(subsys, NULL);
|
|
}
|
|
|
|
out_unlock:
|
|
up_write(&nvmet_config_sem);
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host);
|
|
|
|
static ssize_t nvmet_subsys_attr_version_show(struct config_item *item,
|
|
char *page)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(item);
|
|
|
|
if (NVME_TERTIARY(subsys->ver))
|
|
return snprintf(page, PAGE_SIZE, "%d.%d.%d\n",
|
|
(int)NVME_MAJOR(subsys->ver),
|
|
(int)NVME_MINOR(subsys->ver),
|
|
(int)NVME_TERTIARY(subsys->ver));
|
|
else
|
|
return snprintf(page, PAGE_SIZE, "%d.%d\n",
|
|
(int)NVME_MAJOR(subsys->ver),
|
|
(int)NVME_MINOR(subsys->ver));
|
|
}
|
|
|
|
static ssize_t nvmet_subsys_attr_version_store(struct config_item *item,
|
|
const char *page, size_t count)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(item);
|
|
int major, minor, tertiary = 0;
|
|
int ret;
|
|
|
|
|
|
ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary);
|
|
if (ret != 2 && ret != 3)
|
|
return -EINVAL;
|
|
|
|
down_write(&nvmet_config_sem);
|
|
subsys->ver = NVME_VS(major, minor, tertiary);
|
|
up_write(&nvmet_config_sem);
|
|
|
|
return count;
|
|
}
|
|
CONFIGFS_ATTR(nvmet_subsys_, attr_version);
|
|
|
|
static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item,
|
|
char *page)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(item);
|
|
|
|
return snprintf(page, PAGE_SIZE, "%llx\n", subsys->serial);
|
|
}
|
|
|
|
static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item,
|
|
const char *page, size_t count)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(item);
|
|
|
|
down_write(&nvmet_config_sem);
|
|
sscanf(page, "%llx\n", &subsys->serial);
|
|
up_write(&nvmet_config_sem);
|
|
|
|
return count;
|
|
}
|
|
CONFIGFS_ATTR(nvmet_subsys_, attr_serial);
|
|
|
|
static struct configfs_attribute *nvmet_subsys_attrs[] = {
|
|
&nvmet_subsys_attr_attr_allow_any_host,
|
|
&nvmet_subsys_attr_attr_version,
|
|
&nvmet_subsys_attr_attr_serial,
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* Subsystem structures & folder operation functions below
|
|
*/
|
|
static void nvmet_subsys_release(struct config_item *item)
|
|
{
|
|
struct nvmet_subsys *subsys = to_subsys(item);
|
|
|
|
nvmet_subsys_del_ctrls(subsys);
|
|
nvmet_subsys_put(subsys);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_subsys_item_ops = {
|
|
.release = nvmet_subsys_release,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_subsys_type = {
|
|
.ct_item_ops = &nvmet_subsys_item_ops,
|
|
.ct_attrs = nvmet_subsys_attrs,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group *nvmet_subsys_make(struct config_group *group,
|
|
const char *name)
|
|
{
|
|
struct nvmet_subsys *subsys;
|
|
|
|
if (sysfs_streq(name, NVME_DISC_SUBSYS_NAME)) {
|
|
pr_err("can't create discovery subsystem through configfs\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
subsys = nvmet_subsys_alloc(name, NVME_NQN_NVME);
|
|
if (!subsys)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
config_group_init_type_name(&subsys->group, name, &nvmet_subsys_type);
|
|
|
|
config_group_init_type_name(&subsys->namespaces_group,
|
|
"namespaces", &nvmet_namespaces_type);
|
|
configfs_add_default_group(&subsys->namespaces_group, &subsys->group);
|
|
|
|
config_group_init_type_name(&subsys->allowed_hosts_group,
|
|
"allowed_hosts", &nvmet_allowed_hosts_type);
|
|
configfs_add_default_group(&subsys->allowed_hosts_group,
|
|
&subsys->group);
|
|
|
|
return &subsys->group;
|
|
}
|
|
|
|
static struct configfs_group_operations nvmet_subsystems_group_ops = {
|
|
.make_group = nvmet_subsys_make,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_subsystems_type = {
|
|
.ct_group_ops = &nvmet_subsystems_group_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static ssize_t nvmet_referral_enable_show(struct config_item *item,
|
|
char *page)
|
|
{
|
|
return snprintf(page, PAGE_SIZE, "%d\n", to_nvmet_port(item)->enabled);
|
|
}
|
|
|
|
static ssize_t nvmet_referral_enable_store(struct config_item *item,
|
|
const char *page, size_t count)
|
|
{
|
|
struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent);
|
|
struct nvmet_port *port = to_nvmet_port(item);
|
|
bool enable;
|
|
|
|
if (strtobool(page, &enable))
|
|
goto inval;
|
|
|
|
if (enable)
|
|
nvmet_referral_enable(parent, port);
|
|
else
|
|
nvmet_referral_disable(parent, port);
|
|
|
|
return count;
|
|
inval:
|
|
pr_err("Invalid value '%s' for enable\n", page);
|
|
return -EINVAL;
|
|
}
|
|
|
|
CONFIGFS_ATTR(nvmet_referral_, enable);
|
|
|
|
/*
|
|
* Discovery Service subsystem definitions
|
|
*/
|
|
static struct configfs_attribute *nvmet_referral_attrs[] = {
|
|
&nvmet_attr_addr_adrfam,
|
|
&nvmet_attr_addr_portid,
|
|
&nvmet_attr_addr_treq,
|
|
&nvmet_attr_addr_traddr,
|
|
&nvmet_attr_addr_trsvcid,
|
|
&nvmet_attr_addr_trtype,
|
|
&nvmet_referral_attr_enable,
|
|
NULL,
|
|
};
|
|
|
|
static void nvmet_referral_release(struct config_item *item)
|
|
{
|
|
struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent);
|
|
struct nvmet_port *port = to_nvmet_port(item);
|
|
|
|
nvmet_referral_disable(parent, port);
|
|
kfree(port);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_referral_item_ops = {
|
|
.release = nvmet_referral_release,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_referral_type = {
|
|
.ct_owner = THIS_MODULE,
|
|
.ct_attrs = nvmet_referral_attrs,
|
|
.ct_item_ops = &nvmet_referral_item_ops,
|
|
};
|
|
|
|
static struct config_group *nvmet_referral_make(
|
|
struct config_group *group, const char *name)
|
|
{
|
|
struct nvmet_port *port;
|
|
|
|
port = kzalloc(sizeof(*port), GFP_KERNEL);
|
|
if (!port)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
INIT_LIST_HEAD(&port->entry);
|
|
config_group_init_type_name(&port->group, name, &nvmet_referral_type);
|
|
|
|
return &port->group;
|
|
}
|
|
|
|
static struct configfs_group_operations nvmet_referral_group_ops = {
|
|
.make_group = nvmet_referral_make,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_referrals_type = {
|
|
.ct_owner = THIS_MODULE,
|
|
.ct_group_ops = &nvmet_referral_group_ops,
|
|
};
|
|
|
|
static struct {
|
|
enum nvme_ana_state state;
|
|
const char *name;
|
|
} nvmet_ana_state_names[] = {
|
|
{ NVME_ANA_OPTIMIZED, "optimized" },
|
|
{ NVME_ANA_NONOPTIMIZED, "non-optimized" },
|
|
{ NVME_ANA_INACCESSIBLE, "inaccessible" },
|
|
{ NVME_ANA_PERSISTENT_LOSS, "persistent-loss" },
|
|
{ NVME_ANA_CHANGE, "change" },
|
|
};
|
|
|
|
static ssize_t nvmet_ana_group_ana_state_show(struct config_item *item,
|
|
char *page)
|
|
{
|
|
struct nvmet_ana_group *grp = to_ana_group(item);
|
|
enum nvme_ana_state state = grp->port->ana_state[grp->grpid];
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(nvmet_ana_state_names); i++) {
|
|
if (state != nvmet_ana_state_names[i].state)
|
|
continue;
|
|
return sprintf(page, "%s\n", nvmet_ana_state_names[i].name);
|
|
}
|
|
|
|
return sprintf(page, "\n");
|
|
}
|
|
|
|
static ssize_t nvmet_ana_group_ana_state_store(struct config_item *item,
|
|
const char *page, size_t count)
|
|
{
|
|
struct nvmet_ana_group *grp = to_ana_group(item);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(nvmet_ana_state_names); i++) {
|
|
if (sysfs_streq(page, nvmet_ana_state_names[i].name))
|
|
goto found;
|
|
}
|
|
|
|
pr_err("Invalid value '%s' for ana_state\n", page);
|
|
return -EINVAL;
|
|
|
|
found:
|
|
down_write(&nvmet_ana_sem);
|
|
grp->port->ana_state[grp->grpid] = nvmet_ana_state_names[i].state;
|
|
nvmet_ana_chgcnt++;
|
|
up_write(&nvmet_ana_sem);
|
|
|
|
nvmet_port_send_ana_event(grp->port);
|
|
return count;
|
|
}
|
|
|
|
CONFIGFS_ATTR(nvmet_ana_group_, ana_state);
|
|
|
|
static struct configfs_attribute *nvmet_ana_group_attrs[] = {
|
|
&nvmet_ana_group_attr_ana_state,
|
|
NULL,
|
|
};
|
|
|
|
static void nvmet_ana_group_release(struct config_item *item)
|
|
{
|
|
struct nvmet_ana_group *grp = to_ana_group(item);
|
|
|
|
if (grp == &grp->port->ana_default_group)
|
|
return;
|
|
|
|
down_write(&nvmet_ana_sem);
|
|
grp->port->ana_state[grp->grpid] = NVME_ANA_INACCESSIBLE;
|
|
nvmet_ana_group_enabled[grp->grpid]--;
|
|
up_write(&nvmet_ana_sem);
|
|
|
|
nvmet_port_send_ana_event(grp->port);
|
|
kfree(grp);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_ana_group_item_ops = {
|
|
.release = nvmet_ana_group_release,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_ana_group_type = {
|
|
.ct_item_ops = &nvmet_ana_group_item_ops,
|
|
.ct_attrs = nvmet_ana_group_attrs,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group *nvmet_ana_groups_make_group(
|
|
struct config_group *group, const char *name)
|
|
{
|
|
struct nvmet_port *port = ana_groups_to_port(&group->cg_item);
|
|
struct nvmet_ana_group *grp;
|
|
u32 grpid;
|
|
int ret;
|
|
|
|
ret = kstrtou32(name, 0, &grpid);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
if (grpid <= 1 || grpid > NVMET_MAX_ANAGRPS)
|
|
goto out;
|
|
|
|
ret = -ENOMEM;
|
|
grp = kzalloc(sizeof(*grp), GFP_KERNEL);
|
|
if (!grp)
|
|
goto out;
|
|
grp->port = port;
|
|
grp->grpid = grpid;
|
|
|
|
down_write(&nvmet_ana_sem);
|
|
nvmet_ana_group_enabled[grpid]++;
|
|
up_write(&nvmet_ana_sem);
|
|
|
|
nvmet_port_send_ana_event(grp->port);
|
|
|
|
config_group_init_type_name(&grp->group, name, &nvmet_ana_group_type);
|
|
return &grp->group;
|
|
out:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct configfs_group_operations nvmet_ana_groups_group_ops = {
|
|
.make_group = nvmet_ana_groups_make_group,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_ana_groups_type = {
|
|
.ct_group_ops = &nvmet_ana_groups_group_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
/*
|
|
* Ports definitions.
|
|
*/
|
|
static void nvmet_port_release(struct config_item *item)
|
|
{
|
|
struct nvmet_port *port = to_nvmet_port(item);
|
|
|
|
list_del(&port->global_entry);
|
|
|
|
kfree(port->ana_state);
|
|
kfree(port);
|
|
}
|
|
|
|
static struct configfs_attribute *nvmet_port_attrs[] = {
|
|
&nvmet_attr_addr_adrfam,
|
|
&nvmet_attr_addr_treq,
|
|
&nvmet_attr_addr_traddr,
|
|
&nvmet_attr_addr_trsvcid,
|
|
&nvmet_attr_addr_trtype,
|
|
&nvmet_attr_param_inline_data_size,
|
|
NULL,
|
|
};
|
|
|
|
static struct configfs_item_operations nvmet_port_item_ops = {
|
|
.release = nvmet_port_release,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_port_type = {
|
|
.ct_attrs = nvmet_port_attrs,
|
|
.ct_item_ops = &nvmet_port_item_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group *nvmet_ports_make(struct config_group *group,
|
|
const char *name)
|
|
{
|
|
struct nvmet_port *port;
|
|
u16 portid;
|
|
u32 i;
|
|
|
|
if (kstrtou16(name, 0, &portid))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
port = kzalloc(sizeof(*port), GFP_KERNEL);
|
|
if (!port)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
port->ana_state = kcalloc(NVMET_MAX_ANAGRPS + 1,
|
|
sizeof(*port->ana_state), GFP_KERNEL);
|
|
if (!port->ana_state) {
|
|
kfree(port);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
for (i = 1; i <= NVMET_MAX_ANAGRPS; i++) {
|
|
if (i == NVMET_DEFAULT_ANA_GRPID)
|
|
port->ana_state[1] = NVME_ANA_OPTIMIZED;
|
|
else
|
|
port->ana_state[i] = NVME_ANA_INACCESSIBLE;
|
|
}
|
|
|
|
list_add(&port->global_entry, &nvmet_ports_list);
|
|
|
|
INIT_LIST_HEAD(&port->entry);
|
|
INIT_LIST_HEAD(&port->subsystems);
|
|
INIT_LIST_HEAD(&port->referrals);
|
|
port->inline_data_size = -1; /* < 0 == let the transport choose */
|
|
|
|
port->disc_addr.portid = cpu_to_le16(portid);
|
|
port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW;
|
|
config_group_init_type_name(&port->group, name, &nvmet_port_type);
|
|
|
|
config_group_init_type_name(&port->subsys_group,
|
|
"subsystems", &nvmet_port_subsys_type);
|
|
configfs_add_default_group(&port->subsys_group, &port->group);
|
|
|
|
config_group_init_type_name(&port->referrals_group,
|
|
"referrals", &nvmet_referrals_type);
|
|
configfs_add_default_group(&port->referrals_group, &port->group);
|
|
|
|
config_group_init_type_name(&port->ana_groups_group,
|
|
"ana_groups", &nvmet_ana_groups_type);
|
|
configfs_add_default_group(&port->ana_groups_group, &port->group);
|
|
|
|
port->ana_default_group.port = port;
|
|
port->ana_default_group.grpid = NVMET_DEFAULT_ANA_GRPID;
|
|
config_group_init_type_name(&port->ana_default_group.group,
|
|
__stringify(NVMET_DEFAULT_ANA_GRPID),
|
|
&nvmet_ana_group_type);
|
|
configfs_add_default_group(&port->ana_default_group.group,
|
|
&port->ana_groups_group);
|
|
|
|
return &port->group;
|
|
}
|
|
|
|
static struct configfs_group_operations nvmet_ports_group_ops = {
|
|
.make_group = nvmet_ports_make,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_ports_type = {
|
|
.ct_group_ops = &nvmet_ports_group_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group nvmet_subsystems_group;
|
|
static struct config_group nvmet_ports_group;
|
|
|
|
static void nvmet_host_release(struct config_item *item)
|
|
{
|
|
struct nvmet_host *host = to_host(item);
|
|
|
|
kfree(host);
|
|
}
|
|
|
|
static struct configfs_item_operations nvmet_host_item_ops = {
|
|
.release = nvmet_host_release,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_host_type = {
|
|
.ct_item_ops = &nvmet_host_item_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group *nvmet_hosts_make_group(struct config_group *group,
|
|
const char *name)
|
|
{
|
|
struct nvmet_host *host;
|
|
|
|
host = kzalloc(sizeof(*host), GFP_KERNEL);
|
|
if (!host)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
config_group_init_type_name(&host->group, name, &nvmet_host_type);
|
|
|
|
return &host->group;
|
|
}
|
|
|
|
static struct configfs_group_operations nvmet_hosts_group_ops = {
|
|
.make_group = nvmet_hosts_make_group,
|
|
};
|
|
|
|
static const struct config_item_type nvmet_hosts_type = {
|
|
.ct_group_ops = &nvmet_hosts_group_ops,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct config_group nvmet_hosts_group;
|
|
|
|
static const struct config_item_type nvmet_root_type = {
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct configfs_subsystem nvmet_configfs_subsystem = {
|
|
.su_group = {
|
|
.cg_item = {
|
|
.ci_namebuf = "nvmet",
|
|
.ci_type = &nvmet_root_type,
|
|
},
|
|
},
|
|
};
|
|
|
|
int __init nvmet_init_configfs(void)
|
|
{
|
|
int ret;
|
|
|
|
config_group_init(&nvmet_configfs_subsystem.su_group);
|
|
mutex_init(&nvmet_configfs_subsystem.su_mutex);
|
|
|
|
config_group_init_type_name(&nvmet_subsystems_group,
|
|
"subsystems", &nvmet_subsystems_type);
|
|
configfs_add_default_group(&nvmet_subsystems_group,
|
|
&nvmet_configfs_subsystem.su_group);
|
|
|
|
config_group_init_type_name(&nvmet_ports_group,
|
|
"ports", &nvmet_ports_type);
|
|
configfs_add_default_group(&nvmet_ports_group,
|
|
&nvmet_configfs_subsystem.su_group);
|
|
|
|
config_group_init_type_name(&nvmet_hosts_group,
|
|
"hosts", &nvmet_hosts_type);
|
|
configfs_add_default_group(&nvmet_hosts_group,
|
|
&nvmet_configfs_subsystem.su_group);
|
|
|
|
ret = configfs_register_subsystem(&nvmet_configfs_subsystem);
|
|
if (ret) {
|
|
pr_err("configfs_register_subsystem: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __exit nvmet_exit_configfs(void)
|
|
{
|
|
configfs_unregister_subsystem(&nvmet_configfs_subsystem);
|
|
}
|