| /* |
| * Configfs interface for the NVMe target. |
| * Copyright (c) 2015-2016 HGST, a Western Digital Company. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| */ |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/stat.h> |
| #include <linux/ctype.h> |
| |
| #include "nvmet.h" |
| |
| static struct config_item_type nvmet_host_type; |
| static struct config_item_type nvmet_subsys_type; |
| |
| /* |
| * 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) |
| { |
| switch (to_nvmet_port(item)->disc_addr.adrfam) { |
| case NVMF_ADDR_FAMILY_IP4: |
| return sprintf(page, "ipv4\n"); |
| case NVMF_ADDR_FAMILY_IP6: |
| return sprintf(page, "ipv6\n"); |
| case NVMF_ADDR_FAMILY_IB: |
| return sprintf(page, "ib\n"); |
| case NVMF_ADDR_FAMILY_FC: |
| return sprintf(page, "fc\n"); |
| default: |
| return sprintf(page, "\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); |
| |
| if (port->enabled) { |
| pr_err("Cannot modify address while enabled\n"); |
| pr_err("Disable the address before modifying\n"); |
| return -EACCES; |
| } |
| |
| if (sysfs_streq(page, "ipv4")) { |
| port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP4; |
| } else if (sysfs_streq(page, "ipv6")) { |
| port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP6; |
| } else if (sysfs_streq(page, "ib")) { |
| port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IB; |
| } else if (sysfs_streq(page, "fc")) { |
| port->disc_addr.adrfam = NVMF_ADDR_FAMILY_FC; |
| } else { |
| pr_err("Invalid value '%s' for adrfam\n", page); |
| return -EINVAL; |
| } |
| |
| return count; |
| } |
| |
| CONFIGFS_ATTR(nvmet_, addr_adrfam); |
| |
| static ssize_t nvmet_addr_portid_show(struct config_item *item, |
| char *page) |
| { |
| struct nvmet_port *port = to_nvmet_port(item); |
| |
| return snprintf(page, PAGE_SIZE, "%d\n", |
| le16_to_cpu(port->disc_addr.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 (port->enabled) { |
| pr_err("Cannot modify address while enabled\n"); |
| pr_err("Disable the address before modifying\n"); |
| 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 (port->enabled) { |
| pr_err("Cannot modify address while enabled\n"); |
| pr_err("Disable the address before modifying\n"); |
| return -EACCES; |
| } |
| return snprintf(port->disc_addr.traddr, |
| sizeof(port->disc_addr.traddr), "%s", page); |
| } |
| |
| CONFIGFS_ATTR(nvmet_, addr_traddr); |
| |
| static ssize_t nvmet_addr_treq_show(struct config_item *item, |
| char *page) |
| { |
| switch (to_nvmet_port(item)->disc_addr.treq) { |
| case NVMF_TREQ_NOT_SPECIFIED: |
| return sprintf(page, "not specified\n"); |
| case NVMF_TREQ_REQUIRED: |
| return sprintf(page, "required\n"); |
| case NVMF_TREQ_NOT_REQUIRED: |
| return sprintf(page, "not required\n"); |
| default: |
| return sprintf(page, "\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); |
| |
| if (port->enabled) { |
| pr_err("Cannot modify address while enabled\n"); |
| pr_err("Disable the address before modifying\n"); |
| return -EACCES; |
| } |
| |
| if (sysfs_streq(page, "not specified")) { |
| port->disc_addr.treq = NVMF_TREQ_NOT_SPECIFIED; |
| } else if (sysfs_streq(page, "required")) { |
| port->disc_addr.treq = NVMF_TREQ_REQUIRED; |
| } else if (sysfs_streq(page, "not required")) { |
| port->disc_addr.treq = NVMF_TREQ_NOT_REQUIRED; |
| } else { |
| pr_err("Invalid value '%s' for treq\n", page); |
| return -EINVAL; |
| } |
| |
| 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 (port->enabled) { |
| pr_err("Cannot modify address while enabled\n"); |
| pr_err("Disable the address before modifying\n"); |
| return -EACCES; |
| } |
| return snprintf(port->disc_addr.trsvcid, |
| sizeof(port->disc_addr.trsvcid), "%s", page); |
| } |
| |
| CONFIGFS_ATTR(nvmet_, addr_trsvcid); |
| |
| static ssize_t nvmet_addr_trtype_show(struct config_item *item, |
| char *page) |
| { |
| switch (to_nvmet_port(item)->disc_addr.trtype) { |
| case NVMF_TRTYPE_RDMA: |
| return sprintf(page, "rdma\n"); |
| case NVMF_TRTYPE_LOOP: |
| return sprintf(page, "loop\n"); |
| case NVMF_TRTYPE_FC: |
| return sprintf(page, "fc\n"); |
| default: |
| return sprintf(page, "\n"); |
| } |
| } |
| |
| static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) |
| { |
| port->disc_addr.trtype = NVMF_TRTYPE_RDMA; |
| memset(&port->disc_addr.tsas.rdma, 0, NVMF_TSAS_SIZE); |
| 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 void nvmet_port_init_tsas_loop(struct nvmet_port *port) |
| { |
| port->disc_addr.trtype = NVMF_TRTYPE_LOOP; |
| memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); |
| } |
| |
| static void nvmet_port_init_tsas_fc(struct nvmet_port *port) |
| { |
| port->disc_addr.trtype = NVMF_TRTYPE_FC; |
| memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); |
| } |
| |
| 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); |
| |
| if (port->enabled) { |
| pr_err("Cannot modify address while enabled\n"); |
| pr_err("Disable the address before modifying\n"); |
| return -EACCES; |
| } |
| |
| if (sysfs_streq(page, "rdma")) { |
| nvmet_port_init_tsas_rdma(port); |
| } else if (sysfs_streq(page, "loop")) { |
| nvmet_port_init_tsas_loop(port); |
| } else if (sysfs_streq(page, "fc")) { |
| nvmet_port_init_tsas_fc(port); |
| } else { |
| pr_err("Invalid value '%s' for trtype\n", page); |
| return -EINVAL; |
| } |
| |
| 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; |
| int ret; |
| |
| mutex_lock(&subsys->lock); |
| ret = -EBUSY; |
| if (ns->enabled) |
| goto out_unlock; |
| |
| kfree(ns->device_path); |
| |
| ret = -ENOMEM; |
| ns->device_path = kstrdup(page, 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); |
| |
| 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_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 (strtobool(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 struct configfs_attribute *nvmet_ns_attrs[] = { |
| &nvmet_ns_attr_device_path, |
| &nvmet_ns_attr_device_nguid, |
| &nvmet_ns_attr_enable, |
| 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 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 == 0xffffffff) |
| 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 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_genctr++; |
| up_write(&nvmet_config_sem); |
| return 0; |
| |
| out_free_link: |
| up_write(&nvmet_config_sem); |
| kfree(link); |
| return ret; |
| } |
| |
| static int 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 -EINVAL; |
| |
| found: |
| list_del(&p->entry); |
| nvmet_genctr++; |
| if (list_empty(&port->subsystems)) |
| nvmet_disable_port(port); |
| up_write(&nvmet_config_sem); |
| kfree(p); |
| return 0; |
| } |
| |
| 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 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_genctr++; |
| up_write(&nvmet_config_sem); |
| return 0; |
| out_free_link: |
| up_write(&nvmet_config_sem); |
| kfree(link); |
| return ret; |
| } |
| |
| static int 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 -EINVAL; |
| |
| found: |
| list_del(&p->entry); |
| nvmet_genctr++; |
| up_write(&nvmet_config_sem); |
| kfree(p); |
| return 0; |
| } |
| |
| 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 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; |
| } |
| |
| subsys->allow_any_host = allow_any_host; |
| out_unlock: |
| up_write(&nvmet_config_sem); |
| return ret ? ret : count; |
| } |
| |
| CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); |
| |
| static struct configfs_attribute *nvmet_subsys_attrs[] = { |
| &nvmet_subsys_attr_attr_allow_any_host, |
| 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_put(subsys); |
| } |
| |
| static struct configfs_item_operations nvmet_subsys_item_ops = { |
| .release = nvmet_subsys_release, |
| }; |
| |
| static 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 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(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 *port = to_nvmet_port(item); |
| |
| nvmet_referral_disable(port); |
| kfree(port); |
| } |
| |
| static struct configfs_item_operations nvmet_referral_item_ops = { |
| .release = nvmet_referral_release, |
| }; |
| |
| static 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 struct config_item_type nvmet_referrals_type = { |
| .ct_owner = THIS_MODULE, |
| .ct_group_ops = &nvmet_referral_group_ops, |
| }; |
| |
| /* |
| * Ports definitions. |
| */ |
| static void nvmet_port_release(struct config_item *item) |
| { |
| struct nvmet_port *port = to_nvmet_port(item); |
| |
| 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, |
| NULL, |
| }; |
| |
| static struct configfs_item_operations nvmet_port_item_ops = { |
| .release = nvmet_port_release, |
| }; |
| |
| static 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; |
| |
| if (kstrtou16(name, 0, &portid)) |
| return ERR_PTR(-EINVAL); |
| |
| port = kzalloc(sizeof(*port), GFP_KERNEL); |
| if (!port) |
| return ERR_PTR(-ENOMEM); |
| |
| INIT_LIST_HEAD(&port->entry); |
| INIT_LIST_HEAD(&port->subsystems); |
| INIT_LIST_HEAD(&port->referrals); |
| |
| port->disc_addr.portid = cpu_to_le16(portid); |
| 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); |
| |
| return &port->group; |
| } |
| |
| static struct configfs_group_operations nvmet_ports_group_ops = { |
| .make_group = nvmet_ports_make, |
| }; |
| |
| static 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 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 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 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); |
| } |