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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/drivers/nvme/target/configfs.c

2057 строки
49 KiB
C
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// SPDX-License-Identifier: GPL-2.0
/*
* Configfs interface for the NVMe target.
* Copyright (c) 2015-2016 HGST, a Western Digital Company.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kstrtox.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/pci.h>
#include <linux/pci-p2pdma.h>
#ifdef CONFIG_NVME_TARGET_AUTH
#include <linux/nvme-auth.h>
#endif
#include <crypto/hash.h>
#include <crypto/kpp.h>
#include "nvmet.h"
static const struct config_item_type nvmet_host_type;
static const struct config_item_type nvmet_subsys_type;
static LIST_HEAD(nvmet_ports_list);
struct list_head *nvmet_ports = &nvmet_ports_list;
struct nvmet_type_name_map {
u8 type;
const char *name;
};
static struct nvmet_type_name_map nvmet_transport[] = {
{ NVMF_TRTYPE_RDMA, "rdma" },
{ NVMF_TRTYPE_FC, "fc" },
{ NVMF_TRTYPE_TCP, "tcp" },
{ NVMF_TRTYPE_LOOP, "loop" },
};
static const struct nvmet_type_name_map nvmet_addr_family[] = {
{ NVMF_ADDR_FAMILY_PCI, "pcie" },
{ NVMF_ADDR_FAMILY_IP4, "ipv4" },
{ NVMF_ADDR_FAMILY_IP6, "ipv6" },
{ NVMF_ADDR_FAMILY_IB, "ib" },
{ NVMF_ADDR_FAMILY_FC, "fc" },
{ NVMF_ADDR_FAMILY_LOOP, "loop" },
};
static bool nvmet_is_port_enabled(struct nvmet_port *p, const char *caller)
{
if (p->enabled)
pr_err("Disable port '%u' before changing attribute in %s\n",
le16_to_cpu(p->disc_addr.portid), caller);
return p->enabled;
}
/*
* nvmet_port Generic ConfigFS definitions.
* Used in any place in the ConfigFS tree that refers to an address.
*/
static ssize_t nvmet_addr_adrfam_show(struct config_item *item, char *page)
{
u8 adrfam = to_nvmet_port(item)->disc_addr.adrfam;
int i;
for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) {
if (nvmet_addr_family[i].type == adrfam)
return snprintf(page, PAGE_SIZE, "%s\n",
nvmet_addr_family[i].name);
}
return snprintf(page, PAGE_SIZE, "\n");
}
static ssize_t nvmet_addr_adrfam_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
int i;
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) {
if (sysfs_streq(page, nvmet_addr_family[i].name))
goto found;
}
pr_err("Invalid value '%s' for adrfam\n", page);
return -EINVAL;
found:
port->disc_addr.adrfam = nvmet_addr_family[i].type;
return count;
}
CONFIGFS_ATTR(nvmet_, addr_adrfam);
static ssize_t nvmet_addr_portid_show(struct config_item *item,
char *page)
{
__le16 portid = to_nvmet_port(item)->disc_addr.portid;
return snprintf(page, PAGE_SIZE, "%d\n", le16_to_cpu(portid));
}
static ssize_t nvmet_addr_portid_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
u16 portid = 0;
if (kstrtou16(page, 0, &portid)) {
pr_err("Invalid value '%s' for portid\n", page);
return -EINVAL;
}
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
port->disc_addr.portid = cpu_to_le16(portid);
return count;
}
CONFIGFS_ATTR(nvmet_, addr_portid);
static ssize_t nvmet_addr_traddr_show(struct config_item *item,
char *page)
{
struct nvmet_port *port = to_nvmet_port(item);
return snprintf(page, PAGE_SIZE, "%s\n", port->disc_addr.traddr);
}
static ssize_t nvmet_addr_traddr_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
if (count > NVMF_TRADDR_SIZE) {
pr_err("Invalid value '%s' for traddr\n", page);
return -EINVAL;
}
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
if (sscanf(page, "%s\n", port->disc_addr.traddr) != 1)
return -EINVAL;
return count;
}
CONFIGFS_ATTR(nvmet_, addr_traddr);
static const struct nvmet_type_name_map nvmet_addr_treq[] = {
{ NVMF_TREQ_NOT_SPECIFIED, "not specified" },
{ NVMF_TREQ_REQUIRED, "required" },
{ NVMF_TREQ_NOT_REQUIRED, "not required" },
};
static ssize_t nvmet_addr_treq_show(struct config_item *item, char *page)
{
u8 treq = to_nvmet_port(item)->disc_addr.treq &
NVME_TREQ_SECURE_CHANNEL_MASK;
int i;
for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) {
if (treq == nvmet_addr_treq[i].type)
return snprintf(page, PAGE_SIZE, "%s\n",
nvmet_addr_treq[i].name);
}
return snprintf(page, PAGE_SIZE, "\n");
}
static ssize_t nvmet_addr_treq_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
u8 treq = port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK;
int i;
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) {
if (sysfs_streq(page, nvmet_addr_treq[i].name))
goto found;
}
pr_err("Invalid value '%s' for treq\n", page);
return -EINVAL;
found:
treq |= nvmet_addr_treq[i].type;
port->disc_addr.treq = treq;
return count;
}
CONFIGFS_ATTR(nvmet_, addr_treq);
static ssize_t nvmet_addr_trsvcid_show(struct config_item *item,
char *page)
{
struct nvmet_port *port = to_nvmet_port(item);
return snprintf(page, PAGE_SIZE, "%s\n", port->disc_addr.trsvcid);
}
static ssize_t nvmet_addr_trsvcid_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
if (count > NVMF_TRSVCID_SIZE) {
pr_err("Invalid value '%s' for trsvcid\n", page);
return -EINVAL;
}
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
if (sscanf(page, "%s\n", port->disc_addr.trsvcid) != 1)
return -EINVAL;
return count;
}
CONFIGFS_ATTR(nvmet_, addr_trsvcid);
static ssize_t nvmet_param_inline_data_size_show(struct config_item *item,
char *page)
{
struct nvmet_port *port = to_nvmet_port(item);
return snprintf(page, PAGE_SIZE, "%d\n", port->inline_data_size);
}
static ssize_t nvmet_param_inline_data_size_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
int ret;
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
ret = kstrtoint(page, 0, &port->inline_data_size);
if (ret) {
pr_err("Invalid value '%s' for inline_data_size\n", page);
return -EINVAL;
}
return count;
}
CONFIGFS_ATTR(nvmet_, param_inline_data_size);
#ifdef CONFIG_BLK_DEV_INTEGRITY
static ssize_t nvmet_param_pi_enable_show(struct config_item *item,
char *page)
{
struct nvmet_port *port = to_nvmet_port(item);
return snprintf(page, PAGE_SIZE, "%d\n", port->pi_enable);
}
static ssize_t nvmet_param_pi_enable_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
bool val;
if (kstrtobool(page, &val))
return -EINVAL;
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
port->pi_enable = val;
return count;
}
CONFIGFS_ATTR(nvmet_, param_pi_enable);
#endif
static ssize_t nvmet_addr_trtype_show(struct config_item *item,
char *page)
{
struct nvmet_port *port = to_nvmet_port(item);
int i;
for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) {
if (port->disc_addr.trtype == nvmet_transport[i].type)
return snprintf(page, PAGE_SIZE,
"%s\n", nvmet_transport[i].name);
}
return sprintf(page, "\n");
}
static void nvmet_port_init_tsas_rdma(struct nvmet_port *port)
{
port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED;
port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED;
port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM;
}
static ssize_t nvmet_addr_trtype_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
int i;
if (nvmet_is_port_enabled(port, __func__))
return -EACCES;
for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) {
if (sysfs_streq(page, nvmet_transport[i].name))
goto found;
}
pr_err("Invalid value '%s' for trtype\n", page);
return -EINVAL;
found:
memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE);
port->disc_addr.trtype = nvmet_transport[i].type;
if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA)
nvmet_port_init_tsas_rdma(port);
return count;
}
CONFIGFS_ATTR(nvmet_, addr_trtype);
/*
* Namespace structures & file operation functions below
*/
static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page)
{
return sprintf(page, "%s\n", to_nvmet_ns(item)->device_path);
}
static ssize_t nvmet_ns_device_path_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
struct nvmet_subsys *subsys = ns->subsys;
size_t len;
int ret;
mutex_lock(&subsys->lock);
ret = -EBUSY;
if (ns->enabled)
goto out_unlock;
ret = -EINVAL;
len = strcspn(page, "\n");
if (!len)
goto out_unlock;
kfree(ns->device_path);
ret = -ENOMEM;
ns->device_path = kmemdup_nul(page, len, GFP_KERNEL);
if (!ns->device_path)
goto out_unlock;
mutex_unlock(&subsys->lock);
return count;
out_unlock:
mutex_unlock(&subsys->lock);
return ret;
}
CONFIGFS_ATTR(nvmet_ns_, device_path);
#ifdef CONFIG_PCI_P2PDMA
static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
return pci_p2pdma_enable_show(page, ns->p2p_dev, ns->use_p2pmem);
}
static ssize_t nvmet_ns_p2pmem_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
struct pci_dev *p2p_dev = NULL;
bool use_p2pmem;
int ret = count;
int error;
mutex_lock(&ns->subsys->lock);
if (ns->enabled) {
ret = -EBUSY;
goto out_unlock;
}
error = pci_p2pdma_enable_store(page, &p2p_dev, &use_p2pmem);
if (error) {
ret = error;
goto out_unlock;
}
ns->use_p2pmem = use_p2pmem;
pci_dev_put(ns->p2p_dev);
ns->p2p_dev = p2p_dev;
out_unlock:
mutex_unlock(&ns->subsys->lock);
return ret;
}
CONFIGFS_ATTR(nvmet_ns_, p2pmem);
#endif /* CONFIG_PCI_P2PDMA */
static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page)
{
return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid);
}
static ssize_t nvmet_ns_device_uuid_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
struct nvmet_subsys *subsys = ns->subsys;
int ret = 0;
mutex_lock(&subsys->lock);
if (ns->enabled) {
ret = -EBUSY;
goto out_unlock;
}
if (uuid_parse(page, &ns->uuid))
ret = -EINVAL;
out_unlock:
mutex_unlock(&subsys->lock);
return ret ? ret : count;
}
CONFIGFS_ATTR(nvmet_ns_, device_uuid);
static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page)
{
return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid);
}
static ssize_t nvmet_ns_device_nguid_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
struct nvmet_subsys *subsys = ns->subsys;
u8 nguid[16];
const char *p = page;
int i;
int ret = 0;
mutex_lock(&subsys->lock);
if (ns->enabled) {
ret = -EBUSY;
goto out_unlock;
}
for (i = 0; i < 16; i++) {
if (p + 2 > page + count) {
ret = -EINVAL;
goto out_unlock;
}
if (!isxdigit(p[0]) || !isxdigit(p[1])) {
ret = -EINVAL;
goto out_unlock;
}
nguid[i] = (hex_to_bin(p[0]) << 4) | hex_to_bin(p[1]);
p += 2;
if (*p == '-' || *p == ':')
p++;
}
memcpy(&ns->nguid, nguid, sizeof(nguid));
out_unlock:
mutex_unlock(&subsys->lock);
return ret ? ret : count;
}
CONFIGFS_ATTR(nvmet_ns_, device_nguid);
static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page)
{
return sprintf(page, "%u\n", to_nvmet_ns(item)->anagrpid);
}
static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
u32 oldgrpid, newgrpid;
int ret;
ret = kstrtou32(page, 0, &newgrpid);
if (ret)
return ret;
if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS)
return -EINVAL;
down_write(&nvmet_ana_sem);
oldgrpid = ns->anagrpid;
nvmet_ana_group_enabled[newgrpid]++;
ns->anagrpid = newgrpid;
nvmet_ana_group_enabled[oldgrpid]--;
nvmet_ana_chgcnt++;
up_write(&nvmet_ana_sem);
nvmet_send_ana_event(ns->subsys, NULL);
return count;
}
CONFIGFS_ATTR(nvmet_ns_, ana_grpid);
static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", to_nvmet_ns(item)->enabled);
}
static ssize_t nvmet_ns_enable_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
bool enable;
int ret = 0;
if (kstrtobool(page, &enable))
return -EINVAL;
if (enable)
ret = nvmet_ns_enable(ns);
else
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 (kstrtobool(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 ssize_t nvmet_ns_revalidate_size_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
bool val;
if (kstrtobool(page, &val))
return -EINVAL;
if (!val)
return -EINVAL;
mutex_lock(&ns->subsys->lock);
if (!ns->enabled) {
pr_err("enable ns before revalidate.\n");
mutex_unlock(&ns->subsys->lock);
return -EINVAL;
}
if (nvmet_ns_revalidate(ns))
nvmet_ns_changed(ns->subsys, ns->nsid);
mutex_unlock(&ns->subsys->lock);
return count;
}
CONFIGFS_ATTR_WO(nvmet_ns_, revalidate_size);
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,
&nvmet_ns_attr_revalidate_size,
#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) {
pr_err("invalid nsid %#x", nsid);
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,
};
#ifdef CONFIG_NVME_TARGET_PASSTHRU
static ssize_t nvmet_passthru_device_path_show(struct config_item *item,
char *page)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
return snprintf(page, PAGE_SIZE, "%s\n", subsys->passthru_ctrl_path);
}
static ssize_t nvmet_passthru_device_path_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
size_t len;
int ret;
mutex_lock(&subsys->lock);
ret = -EBUSY;
if (subsys->passthru_ctrl)
goto out_unlock;
ret = -EINVAL;
len = strcspn(page, "\n");
if (!len)
goto out_unlock;
kfree(subsys->passthru_ctrl_path);
ret = -ENOMEM;
subsys->passthru_ctrl_path = kstrndup(page, len, GFP_KERNEL);
if (!subsys->passthru_ctrl_path)
goto out_unlock;
mutex_unlock(&subsys->lock);
return count;
out_unlock:
mutex_unlock(&subsys->lock);
return ret;
}
CONFIGFS_ATTR(nvmet_passthru_, device_path);
static ssize_t nvmet_passthru_enable_show(struct config_item *item,
char *page)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
return sprintf(page, "%d\n", subsys->passthru_ctrl ? 1 : 0);
}
static ssize_t nvmet_passthru_enable_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
bool enable;
int ret = 0;
if (kstrtobool(page, &enable))
return -EINVAL;
if (enable)
ret = nvmet_passthru_ctrl_enable(subsys);
else
nvmet_passthru_ctrl_disable(subsys);
return ret ? ret : count;
}
CONFIGFS_ATTR(nvmet_passthru_, enable);
static ssize_t nvmet_passthru_admin_timeout_show(struct config_item *item,
char *page)
{
return sprintf(page, "%u\n", to_subsys(item->ci_parent)->admin_timeout);
}
static ssize_t nvmet_passthru_admin_timeout_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
unsigned int timeout;
if (kstrtouint(page, 0, &timeout))
return -EINVAL;
subsys->admin_timeout = timeout;
return count;
}
CONFIGFS_ATTR(nvmet_passthru_, admin_timeout);
static ssize_t nvmet_passthru_io_timeout_show(struct config_item *item,
char *page)
{
return sprintf(page, "%u\n", to_subsys(item->ci_parent)->io_timeout);
}
static ssize_t nvmet_passthru_io_timeout_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
unsigned int timeout;
if (kstrtouint(page, 0, &timeout))
return -EINVAL;
subsys->io_timeout = timeout;
return count;
}
CONFIGFS_ATTR(nvmet_passthru_, io_timeout);
static ssize_t nvmet_passthru_clear_ids_show(struct config_item *item,
char *page)
{
return sprintf(page, "%u\n", to_subsys(item->ci_parent)->clear_ids);
}
static ssize_t nvmet_passthru_clear_ids_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item->ci_parent);
unsigned int clear_ids;
if (kstrtouint(page, 0, &clear_ids))
return -EINVAL;
subsys->clear_ids = clear_ids;
return count;
}
CONFIGFS_ATTR(nvmet_passthru_, clear_ids);
static struct configfs_attribute *nvmet_passthru_attrs[] = {
&nvmet_passthru_attr_device_path,
&nvmet_passthru_attr_enable,
&nvmet_passthru_attr_admin_timeout,
&nvmet_passthru_attr_io_timeout,
&nvmet_passthru_attr_clear_ids,
NULL,
};
static const struct config_item_type nvmet_passthru_type = {
.ct_attrs = nvmet_passthru_attrs,
.ct_owner = THIS_MODULE,
};
static void nvmet_add_passthru_group(struct nvmet_subsys *subsys)
{
config_group_init_type_name(&subsys->passthru_group,
"passthru", &nvmet_passthru_type);
configfs_add_default_group(&subsys->passthru_group,
&subsys->group);
}
#else /* CONFIG_NVME_TARGET_PASSTHRU */
static void nvmet_add_passthru_group(struct nvmet_subsys *subsys)
{
}
#endif /* CONFIG_NVME_TARGET_PASSTHRU */
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_del_ctrls(port, subsys);
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 (kstrtobool(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, "%llu.%llu.%llu\n",
NVME_MAJOR(subsys->ver),
NVME_MINOR(subsys->ver),
NVME_TERTIARY(subsys->ver));
return snprintf(page, PAGE_SIZE, "%llu.%llu\n",
NVME_MAJOR(subsys->ver),
NVME_MINOR(subsys->ver));
}
static ssize_t
nvmet_subsys_attr_version_store_locked(struct nvmet_subsys *subsys,
const char *page, size_t count)
{
int major, minor, tertiary = 0;
int ret;
if (subsys->subsys_discovered) {
if (NVME_TERTIARY(subsys->ver))
pr_err("Can't set version number. %llu.%llu.%llu is already assigned\n",
NVME_MAJOR(subsys->ver),
NVME_MINOR(subsys->ver),
NVME_TERTIARY(subsys->ver));
else
pr_err("Can't set version number. %llu.%llu is already assigned\n",
NVME_MAJOR(subsys->ver),
NVME_MINOR(subsys->ver));
return -EINVAL;
}
/* passthru subsystems use the underlying controller's version */
if (nvmet_is_passthru_subsys(subsys))
return -EINVAL;
ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary);
if (ret != 2 && ret != 3)
return -EINVAL;
subsys->ver = NVME_VS(major, minor, tertiary);
return count;
}
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);
ssize_t ret;
down_write(&nvmet_config_sem);
mutex_lock(&subsys->lock);
ret = nvmet_subsys_attr_version_store_locked(subsys, page, count);
mutex_unlock(&subsys->lock);
up_write(&nvmet_config_sem);
return ret;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_version);
/* See Section 1.5 of NVMe 1.4 */
static bool nvmet_is_ascii(const char c)
{
return c >= 0x20 && c <= 0x7e;
}
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, "%.*s\n",
NVMET_SN_MAX_SIZE, subsys->serial);
}
static ssize_t
nvmet_subsys_attr_serial_store_locked(struct nvmet_subsys *subsys,
const char *page, size_t count)
{
int pos, len = strcspn(page, "\n");
if (subsys->subsys_discovered) {
pr_err("Can't set serial number. %s is already assigned\n",
subsys->serial);
return -EINVAL;
}
if (!len || len > NVMET_SN_MAX_SIZE) {
pr_err("Serial Number can not be empty or exceed %d Bytes\n",
NVMET_SN_MAX_SIZE);
return -EINVAL;
}
for (pos = 0; pos < len; pos++) {
if (!nvmet_is_ascii(page[pos])) {
pr_err("Serial Number must contain only ASCII strings\n");
return -EINVAL;
}
}
memcpy_and_pad(subsys->serial, NVMET_SN_MAX_SIZE, page, len, ' ');
return count;
}
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);
ssize_t ret;
down_write(&nvmet_config_sem);
mutex_lock(&subsys->lock);
ret = nvmet_subsys_attr_serial_store_locked(subsys, page, count);
mutex_unlock(&subsys->lock);
up_write(&nvmet_config_sem);
return ret;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_serial);
static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_min);
}
static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item,
const char *page, size_t cnt)
{
u16 cntlid_min;
if (sscanf(page, "%hu\n", &cntlid_min) != 1)
return -EINVAL;
if (cntlid_min == 0)
return -EINVAL;
down_write(&nvmet_config_sem);
if (cntlid_min >= to_subsys(item)->cntlid_max)
goto out_unlock;
to_subsys(item)->cntlid_min = cntlid_min;
up_write(&nvmet_config_sem);
return cnt;
out_unlock:
up_write(&nvmet_config_sem);
return -EINVAL;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min);
static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_max);
}
static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item,
const char *page, size_t cnt)
{
u16 cntlid_max;
if (sscanf(page, "%hu\n", &cntlid_max) != 1)
return -EINVAL;
if (cntlid_max == 0)
return -EINVAL;
down_write(&nvmet_config_sem);
if (cntlid_max <= to_subsys(item)->cntlid_min)
goto out_unlock;
to_subsys(item)->cntlid_max = cntlid_max;
up_write(&nvmet_config_sem);
return cnt;
out_unlock:
up_write(&nvmet_config_sem);
return -EINVAL;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max);
static ssize_t nvmet_subsys_attr_model_show(struct config_item *item,
char *page)
{
struct nvmet_subsys *subsys = to_subsys(item);
return snprintf(page, PAGE_SIZE, "%s\n", subsys->model_number);
}
static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys,
const char *page, size_t count)
{
int pos = 0, len;
char *val;
if (subsys->subsys_discovered) {
pr_err("Can't set model number. %s is already assigned\n",
subsys->model_number);
return -EINVAL;
}
len = strcspn(page, "\n");
if (!len)
return -EINVAL;
if (len > NVMET_MN_MAX_SIZE) {
pr_err("Model number size can not exceed %d Bytes\n",
NVMET_MN_MAX_SIZE);
return -EINVAL;
}
for (pos = 0; pos < len; pos++) {
if (!nvmet_is_ascii(page[pos]))
return -EINVAL;
}
val = kmemdup_nul(page, len, GFP_KERNEL);
if (!val)
return -ENOMEM;
kfree(subsys->model_number);
subsys->model_number = val;
return count;
}
static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item);
ssize_t ret;
down_write(&nvmet_config_sem);
mutex_lock(&subsys->lock);
ret = nvmet_subsys_attr_model_store_locked(subsys, page, count);
mutex_unlock(&subsys->lock);
up_write(&nvmet_config_sem);
return ret;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_model);
static ssize_t nvmet_subsys_attr_ieee_oui_show(struct config_item *item,
char *page)
{
struct nvmet_subsys *subsys = to_subsys(item);
return sysfs_emit(page, "0x%06x\n", subsys->ieee_oui);
}
static ssize_t nvmet_subsys_attr_ieee_oui_store_locked(struct nvmet_subsys *subsys,
const char *page, size_t count)
{
uint32_t val = 0;
int ret;
if (subsys->subsys_discovered) {
pr_err("Can't set IEEE OUI. 0x%06x is already assigned\n",
subsys->ieee_oui);
return -EINVAL;
}
ret = kstrtou32(page, 0, &val);
if (ret < 0)
return ret;
if (val >= 0x1000000)
return -EINVAL;
subsys->ieee_oui = val;
return count;
}
static ssize_t nvmet_subsys_attr_ieee_oui_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item);
ssize_t ret;
down_write(&nvmet_config_sem);
mutex_lock(&subsys->lock);
ret = nvmet_subsys_attr_ieee_oui_store_locked(subsys, page, count);
mutex_unlock(&subsys->lock);
up_write(&nvmet_config_sem);
return ret;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_ieee_oui);
static ssize_t nvmet_subsys_attr_firmware_show(struct config_item *item,
char *page)
{
struct nvmet_subsys *subsys = to_subsys(item);
return sysfs_emit(page, "%s\n", subsys->firmware_rev);
}
static ssize_t nvmet_subsys_attr_firmware_store_locked(struct nvmet_subsys *subsys,
const char *page, size_t count)
{
int pos = 0, len;
char *val;
if (subsys->subsys_discovered) {
pr_err("Can't set firmware revision. %s is already assigned\n",
subsys->firmware_rev);
return -EINVAL;
}
len = strcspn(page, "\n");
if (!len)
return -EINVAL;
if (len > NVMET_FR_MAX_SIZE) {
pr_err("Firmware revision size can not exceed %d Bytes\n",
NVMET_FR_MAX_SIZE);
return -EINVAL;
}
for (pos = 0; pos < len; pos++) {
if (!nvmet_is_ascii(page[pos]))
return -EINVAL;
}
val = kmemdup_nul(page, len, GFP_KERNEL);
if (!val)
return -ENOMEM;
kfree(subsys->firmware_rev);
subsys->firmware_rev = val;
return count;
}
static ssize_t nvmet_subsys_attr_firmware_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item);
ssize_t ret;
down_write(&nvmet_config_sem);
mutex_lock(&subsys->lock);
ret = nvmet_subsys_attr_firmware_store_locked(subsys, page, count);
mutex_unlock(&subsys->lock);
up_write(&nvmet_config_sem);
return ret;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_firmware);
#ifdef CONFIG_BLK_DEV_INTEGRITY
static ssize_t nvmet_subsys_attr_pi_enable_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n", to_subsys(item)->pi_support);
}
static ssize_t nvmet_subsys_attr_pi_enable_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item);
bool pi_enable;
if (kstrtobool(page, &pi_enable))
return -EINVAL;
subsys->pi_support = pi_enable;
return count;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_pi_enable);
#endif
static ssize_t nvmet_subsys_attr_qid_max_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->max_qid);
}
static ssize_t nvmet_subsys_attr_qid_max_store(struct config_item *item,
const char *page, size_t cnt)
{
struct nvmet_subsys *subsys = to_subsys(item);
struct nvmet_ctrl *ctrl;
u16 qid_max;
if (sscanf(page, "%hu\n", &qid_max) != 1)
return -EINVAL;
if (qid_max < 1 || qid_max > NVMET_NR_QUEUES)
return -EINVAL;
down_write(&nvmet_config_sem);
subsys->max_qid = qid_max;
/* Force reconnect */
list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)
ctrl->ops->delete_ctrl(ctrl);
up_write(&nvmet_config_sem);
return cnt;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_qid_max);
static struct configfs_attribute *nvmet_subsys_attrs[] = {
&nvmet_subsys_attr_attr_allow_any_host,
&nvmet_subsys_attr_attr_version,
&nvmet_subsys_attr_attr_serial,
&nvmet_subsys_attr_attr_cntlid_min,
&nvmet_subsys_attr_attr_cntlid_max,
&nvmet_subsys_attr_attr_model,
&nvmet_subsys_attr_attr_qid_max,
&nvmet_subsys_attr_attr_ieee_oui,
&nvmet_subsys_attr_attr_firmware,
#ifdef CONFIG_BLK_DEV_INTEGRITY
&nvmet_subsys_attr_attr_pi_enable,
#endif
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 (IS_ERR(subsys))
return ERR_CAST(subsys);
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);
nvmet_add_passthru_group(subsys);
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 (kstrtobool(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_notify(struct config_group *group,
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);
}
static void nvmet_referral_release(struct config_item *item)
{
struct nvmet_port *port = to_nvmet_port(item);
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,
.disconnect_notify = nvmet_referral_notify,
};
static const struct config_item_type nvmet_referrals_type = {
.ct_owner = THIS_MODULE,
.ct_group_ops = &nvmet_referral_group_ops,
};
static struct nvmet_type_name_map nvmet_ana_state[] = {
{ 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); i++) {
if (state == nvmet_ana_state[i].type)
return sprintf(page, "%s\n", nvmet_ana_state[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);
enum nvme_ana_state *ana_state = grp->port->ana_state;
int i;
for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) {
if (sysfs_streq(page, nvmet_ana_state[i].name))
goto found;
}
pr_err("Invalid value '%s' for ana_state\n", page);
return -EINVAL;
found:
down_write(&nvmet_ana_sem);
ana_state[grp->grpid] = (enum nvme_ana_state) nvmet_ana_state[i].type;
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);
/* Let inflight controllers teardown complete */
flush_workqueue(nvmet_wq);
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,
#ifdef CONFIG_BLK_DEV_INTEGRITY
&nvmet_attr_param_pi_enable,
#endif
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.adrfam = NVMF_ADDR_FAMILY_MAX;
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;
#ifdef CONFIG_NVME_TARGET_AUTH
static ssize_t nvmet_host_dhchap_key_show(struct config_item *item,
char *page)
{
u8 *dhchap_secret = to_host(item)->dhchap_secret;
if (!dhchap_secret)
return sprintf(page, "\n");
return sprintf(page, "%s\n", dhchap_secret);
}
static ssize_t nvmet_host_dhchap_key_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_host *host = to_host(item);
int ret;
ret = nvmet_auth_set_key(host, page, false);
/*
* Re-authentication is a soft state, so keep the
* current authentication valid until the host
* requests re-authentication.
*/
return ret < 0 ? ret : count;
}
CONFIGFS_ATTR(nvmet_host_, dhchap_key);
static ssize_t nvmet_host_dhchap_ctrl_key_show(struct config_item *item,
char *page)
{
u8 *dhchap_secret = to_host(item)->dhchap_ctrl_secret;
if (!dhchap_secret)
return sprintf(page, "\n");
return sprintf(page, "%s\n", dhchap_secret);
}
static ssize_t nvmet_host_dhchap_ctrl_key_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_host *host = to_host(item);
int ret;
ret = nvmet_auth_set_key(host, page, true);
/*
* Re-authentication is a soft state, so keep the
* current authentication valid until the host
* requests re-authentication.
*/
return ret < 0 ? ret : count;
}
CONFIGFS_ATTR(nvmet_host_, dhchap_ctrl_key);
static ssize_t nvmet_host_dhchap_hash_show(struct config_item *item,
char *page)
{
struct nvmet_host *host = to_host(item);
const char *hash_name = nvme_auth_hmac_name(host->dhchap_hash_id);
return sprintf(page, "%s\n", hash_name ? hash_name : "none");
}
static ssize_t nvmet_host_dhchap_hash_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_host *host = to_host(item);
u8 hmac_id;
hmac_id = nvme_auth_hmac_id(page);
if (hmac_id == NVME_AUTH_HASH_INVALID)
return -EINVAL;
if (!crypto_has_shash(nvme_auth_hmac_name(hmac_id), 0, 0))
return -ENOTSUPP;
host->dhchap_hash_id = hmac_id;
return count;
}
CONFIGFS_ATTR(nvmet_host_, dhchap_hash);
static ssize_t nvmet_host_dhchap_dhgroup_show(struct config_item *item,
char *page)
{
struct nvmet_host *host = to_host(item);
const char *dhgroup = nvme_auth_dhgroup_name(host->dhchap_dhgroup_id);
return sprintf(page, "%s\n", dhgroup ? dhgroup : "none");
}
static ssize_t nvmet_host_dhchap_dhgroup_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_host *host = to_host(item);
int dhgroup_id;
dhgroup_id = nvme_auth_dhgroup_id(page);
if (dhgroup_id == NVME_AUTH_DHGROUP_INVALID)
return -EINVAL;
if (dhgroup_id != NVME_AUTH_DHGROUP_NULL) {
const char *kpp = nvme_auth_dhgroup_kpp(dhgroup_id);
if (!crypto_has_kpp(kpp, 0, 0))
return -EINVAL;
}
host->dhchap_dhgroup_id = dhgroup_id;
return count;
}
CONFIGFS_ATTR(nvmet_host_, dhchap_dhgroup);
static struct configfs_attribute *nvmet_host_attrs[] = {
&nvmet_host_attr_dhchap_key,
&nvmet_host_attr_dhchap_ctrl_key,
&nvmet_host_attr_dhchap_hash,
&nvmet_host_attr_dhchap_dhgroup,
NULL,
};
#endif /* CONFIG_NVME_TARGET_AUTH */
static void nvmet_host_release(struct config_item *item)
{
struct nvmet_host *host = to_host(item);
#ifdef CONFIG_NVME_TARGET_AUTH
kfree(host->dhchap_secret);
kfree(host->dhchap_ctrl_secret);
#endif
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,
#ifdef CONFIG_NVME_TARGET_AUTH
.ct_attrs = nvmet_host_attrs,
#endif
.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);
#ifdef CONFIG_NVME_TARGET_AUTH
/* Default to SHA256 */
host->dhchap_hash_id = NVME_AUTH_HASH_SHA256;
#endif
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);
}
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