177141dc6SChristoph Hellwig // SPDX-License-Identifier: GPL-2.0 2a07b4970SChristoph Hellwig /* 3a07b4970SChristoph Hellwig * Configfs interface for the NVMe target. 4a07b4970SChristoph Hellwig * Copyright (c) 2015-2016 HGST, a Western Digital Company. 5a07b4970SChristoph Hellwig */ 6a07b4970SChristoph Hellwig #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7a07b4970SChristoph Hellwig #include <linux/kernel.h> 8a07b4970SChristoph Hellwig #include <linux/module.h> 9a07b4970SChristoph Hellwig #include <linux/slab.h> 10a07b4970SChristoph Hellwig #include <linux/stat.h> 11a07b4970SChristoph Hellwig #include <linux/ctype.h> 12c6925093SLogan Gunthorpe #include <linux/pci.h> 13c6925093SLogan Gunthorpe #include <linux/pci-p2pdma.h> 14a07b4970SChristoph Hellwig 15a07b4970SChristoph Hellwig #include "nvmet.h" 16a07b4970SChristoph Hellwig 1766603a31SBhumika Goyal static const struct config_item_type nvmet_host_type; 1866603a31SBhumika Goyal static const struct config_item_type nvmet_subsys_type; 19a07b4970SChristoph Hellwig 20b662a078SJay Sternberg static LIST_HEAD(nvmet_ports_list); 21b662a078SJay Sternberg struct list_head *nvmet_ports = &nvmet_ports_list; 22b662a078SJay Sternberg 2345e2f3c2SChaitanya Kulkarni struct nvmet_type_name_map { 24a5d18612SChristoph Hellwig u8 type; 25a5d18612SChristoph Hellwig const char *name; 2645e2f3c2SChaitanya Kulkarni }; 2745e2f3c2SChaitanya Kulkarni 2845e2f3c2SChaitanya Kulkarni static struct nvmet_type_name_map nvmet_transport[] = { 29a5d18612SChristoph Hellwig { NVMF_TRTYPE_RDMA, "rdma" }, 30a5d18612SChristoph Hellwig { NVMF_TRTYPE_FC, "fc" }, 31ad4f530eSSagi Grimberg { NVMF_TRTYPE_TCP, "tcp" }, 32a5d18612SChristoph Hellwig { NVMF_TRTYPE_LOOP, "loop" }, 33a5d18612SChristoph Hellwig }; 34a5d18612SChristoph Hellwig 35a07b4970SChristoph Hellwig /* 36a07b4970SChristoph Hellwig * nvmet_port Generic ConfigFS definitions. 37a07b4970SChristoph Hellwig * Used in any place in the ConfigFS tree that refers to an address. 38a07b4970SChristoph Hellwig */ 39a07b4970SChristoph Hellwig static ssize_t nvmet_addr_adrfam_show(struct config_item *item, 40a07b4970SChristoph Hellwig char *page) 41a07b4970SChristoph Hellwig { 42a07b4970SChristoph Hellwig switch (to_nvmet_port(item)->disc_addr.adrfam) { 43a07b4970SChristoph Hellwig case NVMF_ADDR_FAMILY_IP4: 44a07b4970SChristoph Hellwig return sprintf(page, "ipv4\n"); 45a07b4970SChristoph Hellwig case NVMF_ADDR_FAMILY_IP6: 46a07b4970SChristoph Hellwig return sprintf(page, "ipv6\n"); 47a07b4970SChristoph Hellwig case NVMF_ADDR_FAMILY_IB: 48a07b4970SChristoph Hellwig return sprintf(page, "ib\n"); 49885aa401SJames Smart case NVMF_ADDR_FAMILY_FC: 50885aa401SJames Smart return sprintf(page, "fc\n"); 51a07b4970SChristoph Hellwig default: 52a07b4970SChristoph Hellwig return sprintf(page, "\n"); 53a07b4970SChristoph Hellwig } 54a07b4970SChristoph Hellwig } 55a07b4970SChristoph Hellwig 56a07b4970SChristoph Hellwig static ssize_t nvmet_addr_adrfam_store(struct config_item *item, 57a07b4970SChristoph Hellwig const char *page, size_t count) 58a07b4970SChristoph Hellwig { 59a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 60a07b4970SChristoph Hellwig 61a07b4970SChristoph Hellwig if (port->enabled) { 62a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 63a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 64a07b4970SChristoph Hellwig return -EACCES; 65a07b4970SChristoph Hellwig } 66a07b4970SChristoph Hellwig 67a07b4970SChristoph Hellwig if (sysfs_streq(page, "ipv4")) { 68a07b4970SChristoph Hellwig port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP4; 69a07b4970SChristoph Hellwig } else if (sysfs_streq(page, "ipv6")) { 70a07b4970SChristoph Hellwig port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP6; 71a07b4970SChristoph Hellwig } else if (sysfs_streq(page, "ib")) { 72a07b4970SChristoph Hellwig port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IB; 73885aa401SJames Smart } else if (sysfs_streq(page, "fc")) { 74885aa401SJames Smart port->disc_addr.adrfam = NVMF_ADDR_FAMILY_FC; 75a07b4970SChristoph Hellwig } else { 76a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for adrfam\n", page); 77a07b4970SChristoph Hellwig return -EINVAL; 78a07b4970SChristoph Hellwig } 79a07b4970SChristoph Hellwig 80a07b4970SChristoph Hellwig return count; 81a07b4970SChristoph Hellwig } 82a07b4970SChristoph Hellwig 83a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_adrfam); 84a07b4970SChristoph Hellwig 85a07b4970SChristoph Hellwig static ssize_t nvmet_addr_portid_show(struct config_item *item, 86a07b4970SChristoph Hellwig char *page) 87a07b4970SChristoph Hellwig { 88a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 89a07b4970SChristoph Hellwig 90a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", 91a07b4970SChristoph Hellwig le16_to_cpu(port->disc_addr.portid)); 92a07b4970SChristoph Hellwig } 93a07b4970SChristoph Hellwig 94a07b4970SChristoph Hellwig static ssize_t nvmet_addr_portid_store(struct config_item *item, 95a07b4970SChristoph Hellwig const char *page, size_t count) 96a07b4970SChristoph Hellwig { 97a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 98a07b4970SChristoph Hellwig u16 portid = 0; 99a07b4970SChristoph Hellwig 100a07b4970SChristoph Hellwig if (kstrtou16(page, 0, &portid)) { 101a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for portid\n", page); 102a07b4970SChristoph Hellwig return -EINVAL; 103a07b4970SChristoph Hellwig } 104a07b4970SChristoph Hellwig 105a07b4970SChristoph Hellwig if (port->enabled) { 106a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 107a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 108a07b4970SChristoph Hellwig return -EACCES; 109a07b4970SChristoph Hellwig } 110a07b4970SChristoph Hellwig port->disc_addr.portid = cpu_to_le16(portid); 111a07b4970SChristoph Hellwig return count; 112a07b4970SChristoph Hellwig } 113a07b4970SChristoph Hellwig 114a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_portid); 115a07b4970SChristoph Hellwig 116a07b4970SChristoph Hellwig static ssize_t nvmet_addr_traddr_show(struct config_item *item, 117a07b4970SChristoph Hellwig char *page) 118a07b4970SChristoph Hellwig { 119a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 120a07b4970SChristoph Hellwig 121a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%s\n", 122a07b4970SChristoph Hellwig port->disc_addr.traddr); 123a07b4970SChristoph Hellwig } 124a07b4970SChristoph Hellwig 125a07b4970SChristoph Hellwig static ssize_t nvmet_addr_traddr_store(struct config_item *item, 126a07b4970SChristoph Hellwig const char *page, size_t count) 127a07b4970SChristoph Hellwig { 128a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 129a07b4970SChristoph Hellwig 130a07b4970SChristoph Hellwig if (count > NVMF_TRADDR_SIZE) { 131a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for traddr\n", page); 132a07b4970SChristoph Hellwig return -EINVAL; 133a07b4970SChristoph Hellwig } 134a07b4970SChristoph Hellwig 135a07b4970SChristoph Hellwig if (port->enabled) { 136a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 137a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 138a07b4970SChristoph Hellwig return -EACCES; 139a07b4970SChristoph Hellwig } 1409ba2a5cbSSagi Grimberg 1419ba2a5cbSSagi Grimberg if (sscanf(page, "%s\n", port->disc_addr.traddr) != 1) 1429ba2a5cbSSagi Grimberg return -EINVAL; 1439ba2a5cbSSagi Grimberg return count; 144a07b4970SChristoph Hellwig } 145a07b4970SChristoph Hellwig 146a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_traddr); 147a07b4970SChristoph Hellwig 148a07b4970SChristoph Hellwig static ssize_t nvmet_addr_treq_show(struct config_item *item, 149a07b4970SChristoph Hellwig char *page) 150a07b4970SChristoph Hellwig { 1510445e1b5SSagi Grimberg switch (to_nvmet_port(item)->disc_addr.treq & 1520445e1b5SSagi Grimberg NVME_TREQ_SECURE_CHANNEL_MASK) { 153a07b4970SChristoph Hellwig case NVMF_TREQ_NOT_SPECIFIED: 154a07b4970SChristoph Hellwig return sprintf(page, "not specified\n"); 155a07b4970SChristoph Hellwig case NVMF_TREQ_REQUIRED: 156a07b4970SChristoph Hellwig return sprintf(page, "required\n"); 157a07b4970SChristoph Hellwig case NVMF_TREQ_NOT_REQUIRED: 158a07b4970SChristoph Hellwig return sprintf(page, "not required\n"); 159a07b4970SChristoph Hellwig default: 160a07b4970SChristoph Hellwig return sprintf(page, "\n"); 161a07b4970SChristoph Hellwig } 162a07b4970SChristoph Hellwig } 163a07b4970SChristoph Hellwig 164a07b4970SChristoph Hellwig static ssize_t nvmet_addr_treq_store(struct config_item *item, 165a07b4970SChristoph Hellwig const char *page, size_t count) 166a07b4970SChristoph Hellwig { 167a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1680445e1b5SSagi Grimberg u8 treq = port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK; 169a07b4970SChristoph Hellwig 170a07b4970SChristoph Hellwig if (port->enabled) { 171a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 172a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 173a07b4970SChristoph Hellwig return -EACCES; 174a07b4970SChristoph Hellwig } 175a07b4970SChristoph Hellwig 176a07b4970SChristoph Hellwig if (sysfs_streq(page, "not specified")) { 1770445e1b5SSagi Grimberg treq |= NVMF_TREQ_NOT_SPECIFIED; 178a07b4970SChristoph Hellwig } else if (sysfs_streq(page, "required")) { 1790445e1b5SSagi Grimberg treq |= NVMF_TREQ_REQUIRED; 180a07b4970SChristoph Hellwig } else if (sysfs_streq(page, "not required")) { 1810445e1b5SSagi Grimberg treq |= NVMF_TREQ_NOT_REQUIRED; 182a07b4970SChristoph Hellwig } else { 183a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for treq\n", page); 184a07b4970SChristoph Hellwig return -EINVAL; 185a07b4970SChristoph Hellwig } 1860445e1b5SSagi Grimberg port->disc_addr.treq = treq; 187a07b4970SChristoph Hellwig 188a07b4970SChristoph Hellwig return count; 189a07b4970SChristoph Hellwig } 190a07b4970SChristoph Hellwig 191a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_treq); 192a07b4970SChristoph Hellwig 193a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trsvcid_show(struct config_item *item, 194a07b4970SChristoph Hellwig char *page) 195a07b4970SChristoph Hellwig { 196a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 197a07b4970SChristoph Hellwig 198a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%s\n", 199a07b4970SChristoph Hellwig port->disc_addr.trsvcid); 200a07b4970SChristoph Hellwig } 201a07b4970SChristoph Hellwig 202a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trsvcid_store(struct config_item *item, 203a07b4970SChristoph Hellwig const char *page, size_t count) 204a07b4970SChristoph Hellwig { 205a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 206a07b4970SChristoph Hellwig 207a07b4970SChristoph Hellwig if (count > NVMF_TRSVCID_SIZE) { 208a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for trsvcid\n", page); 209a07b4970SChristoph Hellwig return -EINVAL; 210a07b4970SChristoph Hellwig } 211a07b4970SChristoph Hellwig if (port->enabled) { 212a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 213a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 214a07b4970SChristoph Hellwig return -EACCES; 215a07b4970SChristoph Hellwig } 2169ba2a5cbSSagi Grimberg 2179ba2a5cbSSagi Grimberg if (sscanf(page, "%s\n", port->disc_addr.trsvcid) != 1) 2189ba2a5cbSSagi Grimberg return -EINVAL; 2199ba2a5cbSSagi Grimberg return count; 220a07b4970SChristoph Hellwig } 221a07b4970SChristoph Hellwig 222a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_trsvcid); 223a07b4970SChristoph Hellwig 2240d5ee2b2SSteve Wise static ssize_t nvmet_param_inline_data_size_show(struct config_item *item, 2250d5ee2b2SSteve Wise char *page) 2260d5ee2b2SSteve Wise { 2270d5ee2b2SSteve Wise struct nvmet_port *port = to_nvmet_port(item); 2280d5ee2b2SSteve Wise 2290d5ee2b2SSteve Wise return snprintf(page, PAGE_SIZE, "%d\n", port->inline_data_size); 2300d5ee2b2SSteve Wise } 2310d5ee2b2SSteve Wise 2320d5ee2b2SSteve Wise static ssize_t nvmet_param_inline_data_size_store(struct config_item *item, 2330d5ee2b2SSteve Wise const char *page, size_t count) 2340d5ee2b2SSteve Wise { 2350d5ee2b2SSteve Wise struct nvmet_port *port = to_nvmet_port(item); 2360d5ee2b2SSteve Wise int ret; 2370d5ee2b2SSteve Wise 2380d5ee2b2SSteve Wise if (port->enabled) { 2390d5ee2b2SSteve Wise pr_err("Cannot modify inline_data_size while port enabled\n"); 2400d5ee2b2SSteve Wise pr_err("Disable the port before modifying\n"); 2410d5ee2b2SSteve Wise return -EACCES; 2420d5ee2b2SSteve Wise } 2430d5ee2b2SSteve Wise ret = kstrtoint(page, 0, &port->inline_data_size); 2440d5ee2b2SSteve Wise if (ret) { 2450d5ee2b2SSteve Wise pr_err("Invalid value '%s' for inline_data_size\n", page); 2460d5ee2b2SSteve Wise return -EINVAL; 2470d5ee2b2SSteve Wise } 2480d5ee2b2SSteve Wise return count; 2490d5ee2b2SSteve Wise } 2500d5ee2b2SSteve Wise 2510d5ee2b2SSteve Wise CONFIGFS_ATTR(nvmet_, param_inline_data_size); 2520d5ee2b2SSteve Wise 253a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trtype_show(struct config_item *item, 254a07b4970SChristoph Hellwig char *page) 255a07b4970SChristoph Hellwig { 256a5d18612SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 257a5d18612SChristoph Hellwig int i; 258a5d18612SChristoph Hellwig 25945e2f3c2SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { 26045e2f3c2SChaitanya Kulkarni if (port->disc_addr.trtype == nvmet_transport[i].type) 26145e2f3c2SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_transport[i].name); 262a07b4970SChristoph Hellwig } 263a5d18612SChristoph Hellwig 264a5d18612SChristoph Hellwig return sprintf(page, "\n"); 265a07b4970SChristoph Hellwig } 266a07b4970SChristoph Hellwig 267a07b4970SChristoph Hellwig static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) 268a07b4970SChristoph Hellwig { 269a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED; 270a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED; 271a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM; 272a07b4970SChristoph Hellwig } 273a07b4970SChristoph Hellwig 274a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trtype_store(struct config_item *item, 275a07b4970SChristoph Hellwig const char *page, size_t count) 276a07b4970SChristoph Hellwig { 277a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 278a5d18612SChristoph Hellwig int i; 279a07b4970SChristoph Hellwig 280a07b4970SChristoph Hellwig if (port->enabled) { 281a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 282a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 283a07b4970SChristoph Hellwig return -EACCES; 284a07b4970SChristoph Hellwig } 285a07b4970SChristoph Hellwig 28645e2f3c2SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { 28745e2f3c2SChaitanya Kulkarni if (sysfs_streq(page, nvmet_transport[i].name)) 288a5d18612SChristoph Hellwig goto found; 289a07b4970SChristoph Hellwig } 290a07b4970SChristoph Hellwig 291a5d18612SChristoph Hellwig pr_err("Invalid value '%s' for trtype\n", page); 292a5d18612SChristoph Hellwig return -EINVAL; 293a5d18612SChristoph Hellwig found: 294a5d18612SChristoph Hellwig memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); 29545e2f3c2SChaitanya Kulkarni port->disc_addr.trtype = nvmet_transport[i].type; 296a5d18612SChristoph Hellwig if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) 297a5d18612SChristoph Hellwig nvmet_port_init_tsas_rdma(port); 298a07b4970SChristoph Hellwig return count; 299a07b4970SChristoph Hellwig } 300a07b4970SChristoph Hellwig 301a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_trtype); 302a07b4970SChristoph Hellwig 303a07b4970SChristoph Hellwig /* 304a07b4970SChristoph Hellwig * Namespace structures & file operation functions below 305a07b4970SChristoph Hellwig */ 306a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page) 307a07b4970SChristoph Hellwig { 308a07b4970SChristoph Hellwig return sprintf(page, "%s\n", to_nvmet_ns(item)->device_path); 309a07b4970SChristoph Hellwig } 310a07b4970SChristoph Hellwig 311a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_path_store(struct config_item *item, 312a07b4970SChristoph Hellwig const char *page, size_t count) 313a07b4970SChristoph Hellwig { 314a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 315a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = ns->subsys; 3165613d312SHannes Reinecke size_t len; 317a07b4970SChristoph Hellwig int ret; 318a07b4970SChristoph Hellwig 319a07b4970SChristoph Hellwig mutex_lock(&subsys->lock); 320a07b4970SChristoph Hellwig ret = -EBUSY; 321e4fcf07cSSolganik Alexander if (ns->enabled) 322a07b4970SChristoph Hellwig goto out_unlock; 323a07b4970SChristoph Hellwig 3245613d312SHannes Reinecke ret = -EINVAL; 3255613d312SHannes Reinecke len = strcspn(page, "\n"); 3265613d312SHannes Reinecke if (!len) 3275613d312SHannes Reinecke goto out_unlock; 328a07b4970SChristoph Hellwig 3295613d312SHannes Reinecke kfree(ns->device_path); 330a07b4970SChristoph Hellwig ret = -ENOMEM; 3315613d312SHannes Reinecke ns->device_path = kstrndup(page, len, GFP_KERNEL); 332a07b4970SChristoph Hellwig if (!ns->device_path) 333a07b4970SChristoph Hellwig goto out_unlock; 334a07b4970SChristoph Hellwig 335a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 336a07b4970SChristoph Hellwig return count; 337a07b4970SChristoph Hellwig 338a07b4970SChristoph Hellwig out_unlock: 339a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 340a07b4970SChristoph Hellwig return ret; 341a07b4970SChristoph Hellwig } 342a07b4970SChristoph Hellwig 343a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, device_path); 344a07b4970SChristoph Hellwig 345c6925093SLogan Gunthorpe #ifdef CONFIG_PCI_P2PDMA 346c6925093SLogan Gunthorpe static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page) 347c6925093SLogan Gunthorpe { 348c6925093SLogan Gunthorpe struct nvmet_ns *ns = to_nvmet_ns(item); 349c6925093SLogan Gunthorpe 350c6925093SLogan Gunthorpe return pci_p2pdma_enable_show(page, ns->p2p_dev, ns->use_p2pmem); 351c6925093SLogan Gunthorpe } 352c6925093SLogan Gunthorpe 353c6925093SLogan Gunthorpe static ssize_t nvmet_ns_p2pmem_store(struct config_item *item, 354c6925093SLogan Gunthorpe const char *page, size_t count) 355c6925093SLogan Gunthorpe { 356c6925093SLogan Gunthorpe struct nvmet_ns *ns = to_nvmet_ns(item); 357c6925093SLogan Gunthorpe struct pci_dev *p2p_dev = NULL; 358c6925093SLogan Gunthorpe bool use_p2pmem; 359c6925093SLogan Gunthorpe int ret = count; 360c6925093SLogan Gunthorpe int error; 361c6925093SLogan Gunthorpe 362c6925093SLogan Gunthorpe mutex_lock(&ns->subsys->lock); 363c6925093SLogan Gunthorpe if (ns->enabled) { 364c6925093SLogan Gunthorpe ret = -EBUSY; 365c6925093SLogan Gunthorpe goto out_unlock; 366c6925093SLogan Gunthorpe } 367c6925093SLogan Gunthorpe 368c6925093SLogan Gunthorpe error = pci_p2pdma_enable_store(page, &p2p_dev, &use_p2pmem); 369c6925093SLogan Gunthorpe if (error) { 370c6925093SLogan Gunthorpe ret = error; 371c6925093SLogan Gunthorpe goto out_unlock; 372c6925093SLogan Gunthorpe } 373c6925093SLogan Gunthorpe 374c6925093SLogan Gunthorpe ns->use_p2pmem = use_p2pmem; 375c6925093SLogan Gunthorpe pci_dev_put(ns->p2p_dev); 376c6925093SLogan Gunthorpe ns->p2p_dev = p2p_dev; 377c6925093SLogan Gunthorpe 378c6925093SLogan Gunthorpe out_unlock: 379c6925093SLogan Gunthorpe mutex_unlock(&ns->subsys->lock); 380c6925093SLogan Gunthorpe 381c6925093SLogan Gunthorpe return ret; 382c6925093SLogan Gunthorpe } 383c6925093SLogan Gunthorpe 384c6925093SLogan Gunthorpe CONFIGFS_ATTR(nvmet_ns_, p2pmem); 385c6925093SLogan Gunthorpe #endif /* CONFIG_PCI_P2PDMA */ 386c6925093SLogan Gunthorpe 387430c7befSJohannes Thumshirn static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page) 388430c7befSJohannes Thumshirn { 389430c7befSJohannes Thumshirn return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid); 390430c7befSJohannes Thumshirn } 391430c7befSJohannes Thumshirn 392430c7befSJohannes Thumshirn static ssize_t nvmet_ns_device_uuid_store(struct config_item *item, 393430c7befSJohannes Thumshirn const char *page, size_t count) 394430c7befSJohannes Thumshirn { 395430c7befSJohannes Thumshirn struct nvmet_ns *ns = to_nvmet_ns(item); 396430c7befSJohannes Thumshirn struct nvmet_subsys *subsys = ns->subsys; 397430c7befSJohannes Thumshirn int ret = 0; 398430c7befSJohannes Thumshirn 399430c7befSJohannes Thumshirn mutex_lock(&subsys->lock); 400430c7befSJohannes Thumshirn if (ns->enabled) { 401430c7befSJohannes Thumshirn ret = -EBUSY; 402430c7befSJohannes Thumshirn goto out_unlock; 403430c7befSJohannes Thumshirn } 404430c7befSJohannes Thumshirn 405430c7befSJohannes Thumshirn if (uuid_parse(page, &ns->uuid)) 406430c7befSJohannes Thumshirn ret = -EINVAL; 407430c7befSJohannes Thumshirn 408430c7befSJohannes Thumshirn out_unlock: 409430c7befSJohannes Thumshirn mutex_unlock(&subsys->lock); 410430c7befSJohannes Thumshirn return ret ? ret : count; 411430c7befSJohannes Thumshirn } 412430c7befSJohannes Thumshirn 413f871749aSMax Gurtovoy CONFIGFS_ATTR(nvmet_ns_, device_uuid); 414f871749aSMax Gurtovoy 415a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page) 416a07b4970SChristoph Hellwig { 417a07b4970SChristoph Hellwig return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid); 418a07b4970SChristoph Hellwig } 419a07b4970SChristoph Hellwig 420a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_nguid_store(struct config_item *item, 421a07b4970SChristoph Hellwig const char *page, size_t count) 422a07b4970SChristoph Hellwig { 423a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 424a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = ns->subsys; 425a07b4970SChristoph Hellwig u8 nguid[16]; 426a07b4970SChristoph Hellwig const char *p = page; 427a07b4970SChristoph Hellwig int i; 428a07b4970SChristoph Hellwig int ret = 0; 429a07b4970SChristoph Hellwig 430a07b4970SChristoph Hellwig mutex_lock(&subsys->lock); 431e4fcf07cSSolganik Alexander if (ns->enabled) { 432a07b4970SChristoph Hellwig ret = -EBUSY; 433a07b4970SChristoph Hellwig goto out_unlock; 434a07b4970SChristoph Hellwig } 435a07b4970SChristoph Hellwig 436a07b4970SChristoph Hellwig for (i = 0; i < 16; i++) { 437a07b4970SChristoph Hellwig if (p + 2 > page + count) { 438a07b4970SChristoph Hellwig ret = -EINVAL; 439a07b4970SChristoph Hellwig goto out_unlock; 440a07b4970SChristoph Hellwig } 441a07b4970SChristoph Hellwig if (!isxdigit(p[0]) || !isxdigit(p[1])) { 442a07b4970SChristoph Hellwig ret = -EINVAL; 443a07b4970SChristoph Hellwig goto out_unlock; 444a07b4970SChristoph Hellwig } 445a07b4970SChristoph Hellwig 446a07b4970SChristoph Hellwig nguid[i] = (hex_to_bin(p[0]) << 4) | hex_to_bin(p[1]); 447a07b4970SChristoph Hellwig p += 2; 448a07b4970SChristoph Hellwig 449a07b4970SChristoph Hellwig if (*p == '-' || *p == ':') 450a07b4970SChristoph Hellwig p++; 451a07b4970SChristoph Hellwig } 452a07b4970SChristoph Hellwig 453a07b4970SChristoph Hellwig memcpy(&ns->nguid, nguid, sizeof(nguid)); 454a07b4970SChristoph Hellwig out_unlock: 455a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 456a07b4970SChristoph Hellwig return ret ? ret : count; 457a07b4970SChristoph Hellwig } 458a07b4970SChristoph Hellwig 459a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, device_nguid); 460a07b4970SChristoph Hellwig 46162ac0d32SChristoph Hellwig static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page) 46262ac0d32SChristoph Hellwig { 46362ac0d32SChristoph Hellwig return sprintf(page, "%u\n", to_nvmet_ns(item)->anagrpid); 46462ac0d32SChristoph Hellwig } 46562ac0d32SChristoph Hellwig 46662ac0d32SChristoph Hellwig static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item, 46762ac0d32SChristoph Hellwig const char *page, size_t count) 46862ac0d32SChristoph Hellwig { 46962ac0d32SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 47062ac0d32SChristoph Hellwig u32 oldgrpid, newgrpid; 47162ac0d32SChristoph Hellwig int ret; 47262ac0d32SChristoph Hellwig 47362ac0d32SChristoph Hellwig ret = kstrtou32(page, 0, &newgrpid); 47462ac0d32SChristoph Hellwig if (ret) 47562ac0d32SChristoph Hellwig return ret; 47662ac0d32SChristoph Hellwig 47762ac0d32SChristoph Hellwig if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS) 47862ac0d32SChristoph Hellwig return -EINVAL; 47962ac0d32SChristoph Hellwig 48062ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 48162ac0d32SChristoph Hellwig oldgrpid = ns->anagrpid; 48262ac0d32SChristoph Hellwig nvmet_ana_group_enabled[newgrpid]++; 48362ac0d32SChristoph Hellwig ns->anagrpid = newgrpid; 48462ac0d32SChristoph Hellwig nvmet_ana_group_enabled[oldgrpid]--; 48562ac0d32SChristoph Hellwig nvmet_ana_chgcnt++; 48662ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 48762ac0d32SChristoph Hellwig 48862ac0d32SChristoph Hellwig nvmet_send_ana_event(ns->subsys, NULL); 48962ac0d32SChristoph Hellwig return count; 49062ac0d32SChristoph Hellwig } 49162ac0d32SChristoph Hellwig 49262ac0d32SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, ana_grpid); 49362ac0d32SChristoph Hellwig 494a07b4970SChristoph Hellwig static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page) 495a07b4970SChristoph Hellwig { 496e4fcf07cSSolganik Alexander return sprintf(page, "%d\n", to_nvmet_ns(item)->enabled); 497a07b4970SChristoph Hellwig } 498a07b4970SChristoph Hellwig 499a07b4970SChristoph Hellwig static ssize_t nvmet_ns_enable_store(struct config_item *item, 500a07b4970SChristoph Hellwig const char *page, size_t count) 501a07b4970SChristoph Hellwig { 502a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 503a07b4970SChristoph Hellwig bool enable; 504a07b4970SChristoph Hellwig int ret = 0; 505a07b4970SChristoph Hellwig 506a07b4970SChristoph Hellwig if (strtobool(page, &enable)) 507a07b4970SChristoph Hellwig return -EINVAL; 508a07b4970SChristoph Hellwig 509a07b4970SChristoph Hellwig if (enable) 510a07b4970SChristoph Hellwig ret = nvmet_ns_enable(ns); 511a07b4970SChristoph Hellwig else 512a07b4970SChristoph Hellwig nvmet_ns_disable(ns); 513a07b4970SChristoph Hellwig 514a07b4970SChristoph Hellwig return ret ? ret : count; 515a07b4970SChristoph Hellwig } 516a07b4970SChristoph Hellwig 517a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, enable); 518a07b4970SChristoph Hellwig 51955eb942eSChaitanya Kulkarni static ssize_t nvmet_ns_buffered_io_show(struct config_item *item, char *page) 52055eb942eSChaitanya Kulkarni { 52155eb942eSChaitanya Kulkarni return sprintf(page, "%d\n", to_nvmet_ns(item)->buffered_io); 52255eb942eSChaitanya Kulkarni } 52355eb942eSChaitanya Kulkarni 52455eb942eSChaitanya Kulkarni static ssize_t nvmet_ns_buffered_io_store(struct config_item *item, 52555eb942eSChaitanya Kulkarni const char *page, size_t count) 52655eb942eSChaitanya Kulkarni { 52755eb942eSChaitanya Kulkarni struct nvmet_ns *ns = to_nvmet_ns(item); 52855eb942eSChaitanya Kulkarni bool val; 52955eb942eSChaitanya Kulkarni 53055eb942eSChaitanya Kulkarni if (strtobool(page, &val)) 53155eb942eSChaitanya Kulkarni return -EINVAL; 53255eb942eSChaitanya Kulkarni 53355eb942eSChaitanya Kulkarni mutex_lock(&ns->subsys->lock); 53455eb942eSChaitanya Kulkarni if (ns->enabled) { 53555eb942eSChaitanya Kulkarni pr_err("disable ns before setting buffered_io value.\n"); 53655eb942eSChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 53755eb942eSChaitanya Kulkarni return -EINVAL; 53855eb942eSChaitanya Kulkarni } 53955eb942eSChaitanya Kulkarni 54055eb942eSChaitanya Kulkarni ns->buffered_io = val; 54155eb942eSChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 54255eb942eSChaitanya Kulkarni return count; 54355eb942eSChaitanya Kulkarni } 54455eb942eSChaitanya Kulkarni 54555eb942eSChaitanya Kulkarni CONFIGFS_ATTR(nvmet_ns_, buffered_io); 54655eb942eSChaitanya Kulkarni 547a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_ns_attrs[] = { 548a07b4970SChristoph Hellwig &nvmet_ns_attr_device_path, 549a07b4970SChristoph Hellwig &nvmet_ns_attr_device_nguid, 550430c7befSJohannes Thumshirn &nvmet_ns_attr_device_uuid, 55162ac0d32SChristoph Hellwig &nvmet_ns_attr_ana_grpid, 552a07b4970SChristoph Hellwig &nvmet_ns_attr_enable, 55355eb942eSChaitanya Kulkarni &nvmet_ns_attr_buffered_io, 554c6925093SLogan Gunthorpe #ifdef CONFIG_PCI_P2PDMA 555c6925093SLogan Gunthorpe &nvmet_ns_attr_p2pmem, 556c6925093SLogan Gunthorpe #endif 557a07b4970SChristoph Hellwig NULL, 558a07b4970SChristoph Hellwig }; 559a07b4970SChristoph Hellwig 560a07b4970SChristoph Hellwig static void nvmet_ns_release(struct config_item *item) 561a07b4970SChristoph Hellwig { 562a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 563a07b4970SChristoph Hellwig 564a07b4970SChristoph Hellwig nvmet_ns_free(ns); 565a07b4970SChristoph Hellwig } 566a07b4970SChristoph Hellwig 567a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_ns_item_ops = { 568a07b4970SChristoph Hellwig .release = nvmet_ns_release, 569a07b4970SChristoph Hellwig }; 570a07b4970SChristoph Hellwig 57166603a31SBhumika Goyal static const struct config_item_type nvmet_ns_type = { 572a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_ns_item_ops, 573a07b4970SChristoph Hellwig .ct_attrs = nvmet_ns_attrs, 574a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 575a07b4970SChristoph Hellwig }; 576a07b4970SChristoph Hellwig 577a07b4970SChristoph Hellwig static struct config_group *nvmet_ns_make(struct config_group *group, 578a07b4970SChristoph Hellwig const char *name) 579a07b4970SChristoph Hellwig { 580a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = namespaces_to_subsys(&group->cg_item); 581a07b4970SChristoph Hellwig struct nvmet_ns *ns; 582a07b4970SChristoph Hellwig int ret; 583a07b4970SChristoph Hellwig u32 nsid; 584a07b4970SChristoph Hellwig 585a07b4970SChristoph Hellwig ret = kstrtou32(name, 0, &nsid); 586a07b4970SChristoph Hellwig if (ret) 587a07b4970SChristoph Hellwig goto out; 588a07b4970SChristoph Hellwig 589a07b4970SChristoph Hellwig ret = -EINVAL; 5905ba89503SMikhail Skorzhinskii if (nsid == 0 || nsid == NVME_NSID_ALL) { 5915ba89503SMikhail Skorzhinskii pr_err("invalid nsid %#x", nsid); 592a07b4970SChristoph Hellwig goto out; 5935ba89503SMikhail Skorzhinskii } 594a07b4970SChristoph Hellwig 595a07b4970SChristoph Hellwig ret = -ENOMEM; 596a07b4970SChristoph Hellwig ns = nvmet_ns_alloc(subsys, nsid); 597a07b4970SChristoph Hellwig if (!ns) 598a07b4970SChristoph Hellwig goto out; 599a07b4970SChristoph Hellwig config_group_init_type_name(&ns->group, name, &nvmet_ns_type); 600a07b4970SChristoph Hellwig 601a07b4970SChristoph Hellwig pr_info("adding nsid %d to subsystem %s\n", nsid, subsys->subsysnqn); 602a07b4970SChristoph Hellwig 603a07b4970SChristoph Hellwig return &ns->group; 604a07b4970SChristoph Hellwig out: 605a07b4970SChristoph Hellwig return ERR_PTR(ret); 606a07b4970SChristoph Hellwig } 607a07b4970SChristoph Hellwig 608a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_namespaces_group_ops = { 609a07b4970SChristoph Hellwig .make_group = nvmet_ns_make, 610a07b4970SChristoph Hellwig }; 611a07b4970SChristoph Hellwig 61266603a31SBhumika Goyal static const struct config_item_type nvmet_namespaces_type = { 613a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_namespaces_group_ops, 614a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 615a07b4970SChristoph Hellwig }; 616a07b4970SChristoph Hellwig 617a07b4970SChristoph Hellwig static int nvmet_port_subsys_allow_link(struct config_item *parent, 618a07b4970SChristoph Hellwig struct config_item *target) 619a07b4970SChristoph Hellwig { 620a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(parent->ci_parent); 621a07b4970SChristoph Hellwig struct nvmet_subsys *subsys; 622a07b4970SChristoph Hellwig struct nvmet_subsys_link *link, *p; 623a07b4970SChristoph Hellwig int ret; 624a07b4970SChristoph Hellwig 625a07b4970SChristoph Hellwig if (target->ci_type != &nvmet_subsys_type) { 626a07b4970SChristoph Hellwig pr_err("can only link subsystems into the subsystems dir.!\n"); 627a07b4970SChristoph Hellwig return -EINVAL; 628a07b4970SChristoph Hellwig } 629a07b4970SChristoph Hellwig subsys = to_subsys(target); 630a07b4970SChristoph Hellwig link = kmalloc(sizeof(*link), GFP_KERNEL); 631a07b4970SChristoph Hellwig if (!link) 632a07b4970SChristoph Hellwig return -ENOMEM; 633a07b4970SChristoph Hellwig link->subsys = subsys; 634a07b4970SChristoph Hellwig 635a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 636a07b4970SChristoph Hellwig ret = -EEXIST; 637a07b4970SChristoph Hellwig list_for_each_entry(p, &port->subsystems, entry) { 638a07b4970SChristoph Hellwig if (p->subsys == subsys) 639a07b4970SChristoph Hellwig goto out_free_link; 640a07b4970SChristoph Hellwig } 641a07b4970SChristoph Hellwig 642a07b4970SChristoph Hellwig if (list_empty(&port->subsystems)) { 643a07b4970SChristoph Hellwig ret = nvmet_enable_port(port); 644a07b4970SChristoph Hellwig if (ret) 645a07b4970SChristoph Hellwig goto out_free_link; 646a07b4970SChristoph Hellwig } 647a07b4970SChristoph Hellwig 648a07b4970SChristoph Hellwig list_add_tail(&link->entry, &port->subsystems); 649b662a078SJay Sternberg nvmet_port_disc_changed(port, subsys); 650b662a078SJay Sternberg 651a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 652a07b4970SChristoph Hellwig return 0; 653a07b4970SChristoph Hellwig 654a07b4970SChristoph Hellwig out_free_link: 655a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 656a07b4970SChristoph Hellwig kfree(link); 657a07b4970SChristoph Hellwig return ret; 658a07b4970SChristoph Hellwig } 659a07b4970SChristoph Hellwig 660e16769d4SAndrzej Pietrasiewicz static void nvmet_port_subsys_drop_link(struct config_item *parent, 661a07b4970SChristoph Hellwig struct config_item *target) 662a07b4970SChristoph Hellwig { 663a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(parent->ci_parent); 664a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(target); 665a07b4970SChristoph Hellwig struct nvmet_subsys_link *p; 666a07b4970SChristoph Hellwig 667a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 668a07b4970SChristoph Hellwig list_for_each_entry(p, &port->subsystems, entry) { 669a07b4970SChristoph Hellwig if (p->subsys == subsys) 670a07b4970SChristoph Hellwig goto found; 671a07b4970SChristoph Hellwig } 672a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 673e16769d4SAndrzej Pietrasiewicz return; 674a07b4970SChristoph Hellwig 675a07b4970SChristoph Hellwig found: 676a07b4970SChristoph Hellwig list_del(&p->entry); 6773aed8673SLogan Gunthorpe nvmet_port_del_ctrls(port, subsys); 678b662a078SJay Sternberg nvmet_port_disc_changed(port, subsys); 679b662a078SJay Sternberg 680a07b4970SChristoph Hellwig if (list_empty(&port->subsystems)) 681a07b4970SChristoph Hellwig nvmet_disable_port(port); 682a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 683a07b4970SChristoph Hellwig kfree(p); 684a07b4970SChristoph Hellwig } 685a07b4970SChristoph Hellwig 686a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_port_subsys_item_ops = { 687a07b4970SChristoph Hellwig .allow_link = nvmet_port_subsys_allow_link, 688a07b4970SChristoph Hellwig .drop_link = nvmet_port_subsys_drop_link, 689a07b4970SChristoph Hellwig }; 690a07b4970SChristoph Hellwig 69166603a31SBhumika Goyal static const struct config_item_type nvmet_port_subsys_type = { 692a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_port_subsys_item_ops, 693a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 694a07b4970SChristoph Hellwig }; 695a07b4970SChristoph Hellwig 696a07b4970SChristoph Hellwig static int nvmet_allowed_hosts_allow_link(struct config_item *parent, 697a07b4970SChristoph Hellwig struct config_item *target) 698a07b4970SChristoph Hellwig { 699a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); 700a07b4970SChristoph Hellwig struct nvmet_host *host; 701a07b4970SChristoph Hellwig struct nvmet_host_link *link, *p; 702a07b4970SChristoph Hellwig int ret; 703a07b4970SChristoph Hellwig 704a07b4970SChristoph Hellwig if (target->ci_type != &nvmet_host_type) { 705a07b4970SChristoph Hellwig pr_err("can only link hosts into the allowed_hosts directory!\n"); 706a07b4970SChristoph Hellwig return -EINVAL; 707a07b4970SChristoph Hellwig } 708a07b4970SChristoph Hellwig 709a07b4970SChristoph Hellwig host = to_host(target); 710a07b4970SChristoph Hellwig link = kmalloc(sizeof(*link), GFP_KERNEL); 711a07b4970SChristoph Hellwig if (!link) 712a07b4970SChristoph Hellwig return -ENOMEM; 713a07b4970SChristoph Hellwig link->host = host; 714a07b4970SChristoph Hellwig 715a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 716a07b4970SChristoph Hellwig ret = -EINVAL; 717a07b4970SChristoph Hellwig if (subsys->allow_any_host) { 718a07b4970SChristoph Hellwig pr_err("can't add hosts when allow_any_host is set!\n"); 719a07b4970SChristoph Hellwig goto out_free_link; 720a07b4970SChristoph Hellwig } 721a07b4970SChristoph Hellwig 722a07b4970SChristoph Hellwig ret = -EEXIST; 723a07b4970SChristoph Hellwig list_for_each_entry(p, &subsys->hosts, entry) { 724a07b4970SChristoph Hellwig if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) 725a07b4970SChristoph Hellwig goto out_free_link; 726a07b4970SChristoph Hellwig } 727a07b4970SChristoph Hellwig list_add_tail(&link->entry, &subsys->hosts); 728b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, host); 729b662a078SJay Sternberg 730a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 731a07b4970SChristoph Hellwig return 0; 732a07b4970SChristoph Hellwig out_free_link: 733a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 734a07b4970SChristoph Hellwig kfree(link); 735a07b4970SChristoph Hellwig return ret; 736a07b4970SChristoph Hellwig } 737a07b4970SChristoph Hellwig 738e16769d4SAndrzej Pietrasiewicz static void nvmet_allowed_hosts_drop_link(struct config_item *parent, 739a07b4970SChristoph Hellwig struct config_item *target) 740a07b4970SChristoph Hellwig { 741a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); 742a07b4970SChristoph Hellwig struct nvmet_host *host = to_host(target); 743a07b4970SChristoph Hellwig struct nvmet_host_link *p; 744a07b4970SChristoph Hellwig 745a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 746a07b4970SChristoph Hellwig list_for_each_entry(p, &subsys->hosts, entry) { 747a07b4970SChristoph Hellwig if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) 748a07b4970SChristoph Hellwig goto found; 749a07b4970SChristoph Hellwig } 750a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 751e16769d4SAndrzej Pietrasiewicz return; 752a07b4970SChristoph Hellwig 753a07b4970SChristoph Hellwig found: 754a07b4970SChristoph Hellwig list_del(&p->entry); 755b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, host); 756b662a078SJay Sternberg 757a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 758a07b4970SChristoph Hellwig kfree(p); 759a07b4970SChristoph Hellwig } 760a07b4970SChristoph Hellwig 761a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_allowed_hosts_item_ops = { 762a07b4970SChristoph Hellwig .allow_link = nvmet_allowed_hosts_allow_link, 763a07b4970SChristoph Hellwig .drop_link = nvmet_allowed_hosts_drop_link, 764a07b4970SChristoph Hellwig }; 765a07b4970SChristoph Hellwig 76666603a31SBhumika Goyal static const struct config_item_type nvmet_allowed_hosts_type = { 767a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_allowed_hosts_item_ops, 768a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 769a07b4970SChristoph Hellwig }; 770a07b4970SChristoph Hellwig 771a07b4970SChristoph Hellwig static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item, 772a07b4970SChristoph Hellwig char *page) 773a07b4970SChristoph Hellwig { 774a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", 775a07b4970SChristoph Hellwig to_subsys(item)->allow_any_host); 776a07b4970SChristoph Hellwig } 777a07b4970SChristoph Hellwig 778a07b4970SChristoph Hellwig static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, 779a07b4970SChristoph Hellwig const char *page, size_t count) 780a07b4970SChristoph Hellwig { 781a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(item); 782a07b4970SChristoph Hellwig bool allow_any_host; 783a07b4970SChristoph Hellwig int ret = 0; 784a07b4970SChristoph Hellwig 785a07b4970SChristoph Hellwig if (strtobool(page, &allow_any_host)) 786a07b4970SChristoph Hellwig return -EINVAL; 787a07b4970SChristoph Hellwig 788a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 789a07b4970SChristoph Hellwig if (allow_any_host && !list_empty(&subsys->hosts)) { 790a07b4970SChristoph Hellwig pr_err("Can't set allow_any_host when explicit hosts are set!\n"); 791a07b4970SChristoph Hellwig ret = -EINVAL; 792a07b4970SChristoph Hellwig goto out_unlock; 793a07b4970SChristoph Hellwig } 794a07b4970SChristoph Hellwig 795b662a078SJay Sternberg if (subsys->allow_any_host != allow_any_host) { 796a07b4970SChristoph Hellwig subsys->allow_any_host = allow_any_host; 797b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, NULL); 798b662a078SJay Sternberg } 799b662a078SJay Sternberg 800a07b4970SChristoph Hellwig out_unlock: 801a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 802a07b4970SChristoph Hellwig return ret ? ret : count; 803a07b4970SChristoph Hellwig } 804a07b4970SChristoph Hellwig 805a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); 806a07b4970SChristoph Hellwig 80741528f80SJohannes Thumshirn static ssize_t nvmet_subsys_attr_version_show(struct config_item *item, 808c61d788bSJohannes Thumshirn char *page) 809c61d788bSJohannes Thumshirn { 810c61d788bSJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 811c61d788bSJohannes Thumshirn 812c61d788bSJohannes Thumshirn if (NVME_TERTIARY(subsys->ver)) 813c61d788bSJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%d.%d.%d\n", 814c61d788bSJohannes Thumshirn (int)NVME_MAJOR(subsys->ver), 815c61d788bSJohannes Thumshirn (int)NVME_MINOR(subsys->ver), 816c61d788bSJohannes Thumshirn (int)NVME_TERTIARY(subsys->ver)); 817527123c7SChaitanya Kulkarni 818c61d788bSJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%d.%d\n", 819c61d788bSJohannes Thumshirn (int)NVME_MAJOR(subsys->ver), 820c61d788bSJohannes Thumshirn (int)NVME_MINOR(subsys->ver)); 821c61d788bSJohannes Thumshirn } 822c61d788bSJohannes Thumshirn 82341528f80SJohannes Thumshirn static ssize_t nvmet_subsys_attr_version_store(struct config_item *item, 824c61d788bSJohannes Thumshirn const char *page, size_t count) 825c61d788bSJohannes Thumshirn { 826c61d788bSJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 827c61d788bSJohannes Thumshirn int major, minor, tertiary = 0; 828c61d788bSJohannes Thumshirn int ret; 829c61d788bSJohannes Thumshirn 830c61d788bSJohannes Thumshirn ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary); 831c61d788bSJohannes Thumshirn if (ret != 2 && ret != 3) 832c61d788bSJohannes Thumshirn return -EINVAL; 833c61d788bSJohannes Thumshirn 834c61d788bSJohannes Thumshirn down_write(&nvmet_config_sem); 835c61d788bSJohannes Thumshirn subsys->ver = NVME_VS(major, minor, tertiary); 836c61d788bSJohannes Thumshirn up_write(&nvmet_config_sem); 837c61d788bSJohannes Thumshirn 838c61d788bSJohannes Thumshirn return count; 839c61d788bSJohannes Thumshirn } 84041528f80SJohannes Thumshirn CONFIGFS_ATTR(nvmet_subsys_, attr_version); 841c61d788bSJohannes Thumshirn 842fcbc5459SJohannes Thumshirn static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item, 843fcbc5459SJohannes Thumshirn char *page) 844fcbc5459SJohannes Thumshirn { 845fcbc5459SJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 846fcbc5459SJohannes Thumshirn 847fcbc5459SJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%llx\n", subsys->serial); 848fcbc5459SJohannes Thumshirn } 849fcbc5459SJohannes Thumshirn 850fcbc5459SJohannes Thumshirn static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item, 851fcbc5459SJohannes Thumshirn const char *page, size_t count) 852fcbc5459SJohannes Thumshirn { 853d3a9b0caSChaitanya Kulkarni u64 serial; 854d3a9b0caSChaitanya Kulkarni 855d3a9b0caSChaitanya Kulkarni if (sscanf(page, "%llx\n", &serial) != 1) 856d3a9b0caSChaitanya Kulkarni return -EINVAL; 857fcbc5459SJohannes Thumshirn 858fcbc5459SJohannes Thumshirn down_write(&nvmet_config_sem); 859d3a9b0caSChaitanya Kulkarni to_subsys(item)->serial = serial; 860fcbc5459SJohannes Thumshirn up_write(&nvmet_config_sem); 861fcbc5459SJohannes Thumshirn 862fcbc5459SJohannes Thumshirn return count; 863fcbc5459SJohannes Thumshirn } 864fcbc5459SJohannes Thumshirn CONFIGFS_ATTR(nvmet_subsys_, attr_serial); 865fcbc5459SJohannes Thumshirn 86694a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item, 86794a39d61SChaitanya Kulkarni char *page) 86894a39d61SChaitanya Kulkarni { 86994a39d61SChaitanya Kulkarni return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_min); 87094a39d61SChaitanya Kulkarni } 87194a39d61SChaitanya Kulkarni 87294a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item, 87394a39d61SChaitanya Kulkarni const char *page, size_t cnt) 87494a39d61SChaitanya Kulkarni { 87594a39d61SChaitanya Kulkarni u16 cntlid_min; 87694a39d61SChaitanya Kulkarni 87794a39d61SChaitanya Kulkarni if (sscanf(page, "%hu\n", &cntlid_min) != 1) 87894a39d61SChaitanya Kulkarni return -EINVAL; 87994a39d61SChaitanya Kulkarni 88094a39d61SChaitanya Kulkarni if (cntlid_min == 0) 88194a39d61SChaitanya Kulkarni return -EINVAL; 88294a39d61SChaitanya Kulkarni 88394a39d61SChaitanya Kulkarni down_write(&nvmet_config_sem); 88494a39d61SChaitanya Kulkarni if (cntlid_min >= to_subsys(item)->cntlid_max) 88594a39d61SChaitanya Kulkarni goto out_unlock; 88694a39d61SChaitanya Kulkarni to_subsys(item)->cntlid_min = cntlid_min; 88794a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 88894a39d61SChaitanya Kulkarni return cnt; 88994a39d61SChaitanya Kulkarni 89094a39d61SChaitanya Kulkarni out_unlock: 89194a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 89294a39d61SChaitanya Kulkarni return -EINVAL; 89394a39d61SChaitanya Kulkarni } 89494a39d61SChaitanya Kulkarni CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min); 89594a39d61SChaitanya Kulkarni 89694a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item, 89794a39d61SChaitanya Kulkarni char *page) 89894a39d61SChaitanya Kulkarni { 89994a39d61SChaitanya Kulkarni return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_max); 90094a39d61SChaitanya Kulkarni } 90194a39d61SChaitanya Kulkarni 90294a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item, 90394a39d61SChaitanya Kulkarni const char *page, size_t cnt) 90494a39d61SChaitanya Kulkarni { 90594a39d61SChaitanya Kulkarni u16 cntlid_max; 90694a39d61SChaitanya Kulkarni 90794a39d61SChaitanya Kulkarni if (sscanf(page, "%hu\n", &cntlid_max) != 1) 90894a39d61SChaitanya Kulkarni return -EINVAL; 90994a39d61SChaitanya Kulkarni 91094a39d61SChaitanya Kulkarni if (cntlid_max == 0) 91194a39d61SChaitanya Kulkarni return -EINVAL; 91294a39d61SChaitanya Kulkarni 91394a39d61SChaitanya Kulkarni down_write(&nvmet_config_sem); 91494a39d61SChaitanya Kulkarni if (cntlid_max <= to_subsys(item)->cntlid_min) 91594a39d61SChaitanya Kulkarni goto out_unlock; 91694a39d61SChaitanya Kulkarni to_subsys(item)->cntlid_max = cntlid_max; 91794a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 91894a39d61SChaitanya Kulkarni return cnt; 91994a39d61SChaitanya Kulkarni 92094a39d61SChaitanya Kulkarni out_unlock: 92194a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 92294a39d61SChaitanya Kulkarni return -EINVAL; 92394a39d61SChaitanya Kulkarni } 92494a39d61SChaitanya Kulkarni CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max); 92594a39d61SChaitanya Kulkarni 926013b7ebeSMark Ruijter static ssize_t nvmet_subsys_attr_model_show(struct config_item *item, 927013b7ebeSMark Ruijter char *page) 928013b7ebeSMark Ruijter { 929013b7ebeSMark Ruijter struct nvmet_subsys *subsys = to_subsys(item); 930013b7ebeSMark Ruijter struct nvmet_subsys_model *subsys_model; 931013b7ebeSMark Ruijter char *model = NVMET_DEFAULT_CTRL_MODEL; 932013b7ebeSMark Ruijter int ret; 933013b7ebeSMark Ruijter 934013b7ebeSMark Ruijter rcu_read_lock(); 935013b7ebeSMark Ruijter subsys_model = rcu_dereference(subsys->model); 936013b7ebeSMark Ruijter if (subsys_model) 937013b7ebeSMark Ruijter model = subsys_model->number; 938013b7ebeSMark Ruijter ret = snprintf(page, PAGE_SIZE, "%s\n", model); 939013b7ebeSMark Ruijter rcu_read_unlock(); 940013b7ebeSMark Ruijter 941013b7ebeSMark Ruijter return ret; 942013b7ebeSMark Ruijter } 943013b7ebeSMark Ruijter 944013b7ebeSMark Ruijter /* See Section 1.5 of NVMe 1.4 */ 945013b7ebeSMark Ruijter static bool nvmet_is_ascii(const char c) 946013b7ebeSMark Ruijter { 947013b7ebeSMark Ruijter return c >= 0x20 && c <= 0x7e; 948013b7ebeSMark Ruijter } 949013b7ebeSMark Ruijter 950013b7ebeSMark Ruijter static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, 951013b7ebeSMark Ruijter const char *page, size_t count) 952013b7ebeSMark Ruijter { 953013b7ebeSMark Ruijter struct nvmet_subsys *subsys = to_subsys(item); 954013b7ebeSMark Ruijter struct nvmet_subsys_model *new_model; 955013b7ebeSMark Ruijter char *new_model_number; 956013b7ebeSMark Ruijter int pos = 0, len; 957013b7ebeSMark Ruijter 958013b7ebeSMark Ruijter len = strcspn(page, "\n"); 959013b7ebeSMark Ruijter if (!len) 960013b7ebeSMark Ruijter return -EINVAL; 961013b7ebeSMark Ruijter 962013b7ebeSMark Ruijter for (pos = 0; pos < len; pos++) { 963013b7ebeSMark Ruijter if (!nvmet_is_ascii(page[pos])) 964013b7ebeSMark Ruijter return -EINVAL; 965013b7ebeSMark Ruijter } 966013b7ebeSMark Ruijter 967013b7ebeSMark Ruijter new_model_number = kstrndup(page, len, GFP_KERNEL); 968013b7ebeSMark Ruijter if (!new_model_number) 969013b7ebeSMark Ruijter return -ENOMEM; 970013b7ebeSMark Ruijter 971013b7ebeSMark Ruijter new_model = kzalloc(sizeof(*new_model) + len + 1, GFP_KERNEL); 972013b7ebeSMark Ruijter if (!new_model) { 973013b7ebeSMark Ruijter kfree(new_model_number); 974013b7ebeSMark Ruijter return -ENOMEM; 975013b7ebeSMark Ruijter } 976013b7ebeSMark Ruijter memcpy(new_model->number, new_model_number, len); 977013b7ebeSMark Ruijter 978013b7ebeSMark Ruijter down_write(&nvmet_config_sem); 979013b7ebeSMark Ruijter mutex_lock(&subsys->lock); 980013b7ebeSMark Ruijter new_model = rcu_replace_pointer(subsys->model, new_model, 981013b7ebeSMark Ruijter mutex_is_locked(&subsys->lock)); 982013b7ebeSMark Ruijter mutex_unlock(&subsys->lock); 983013b7ebeSMark Ruijter up_write(&nvmet_config_sem); 984013b7ebeSMark Ruijter 985013b7ebeSMark Ruijter kfree_rcu(new_model, rcuhead); 986013b7ebeSMark Ruijter 987013b7ebeSMark Ruijter return count; 988013b7ebeSMark Ruijter } 989013b7ebeSMark Ruijter CONFIGFS_ATTR(nvmet_subsys_, attr_model); 990013b7ebeSMark Ruijter 991a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_subsys_attrs[] = { 992a07b4970SChristoph Hellwig &nvmet_subsys_attr_attr_allow_any_host, 99341528f80SJohannes Thumshirn &nvmet_subsys_attr_attr_version, 994fcbc5459SJohannes Thumshirn &nvmet_subsys_attr_attr_serial, 99594a39d61SChaitanya Kulkarni &nvmet_subsys_attr_attr_cntlid_min, 99694a39d61SChaitanya Kulkarni &nvmet_subsys_attr_attr_cntlid_max, 997013b7ebeSMark Ruijter &nvmet_subsys_attr_attr_model, 998a07b4970SChristoph Hellwig NULL, 999a07b4970SChristoph Hellwig }; 1000a07b4970SChristoph Hellwig 1001a07b4970SChristoph Hellwig /* 1002a07b4970SChristoph Hellwig * Subsystem structures & folder operation functions below 1003a07b4970SChristoph Hellwig */ 1004a07b4970SChristoph Hellwig static void nvmet_subsys_release(struct config_item *item) 1005a07b4970SChristoph Hellwig { 1006a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(item); 1007a07b4970SChristoph Hellwig 1008344770b0SSagi Grimberg nvmet_subsys_del_ctrls(subsys); 1009a07b4970SChristoph Hellwig nvmet_subsys_put(subsys); 1010a07b4970SChristoph Hellwig } 1011a07b4970SChristoph Hellwig 1012a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_subsys_item_ops = { 1013a07b4970SChristoph Hellwig .release = nvmet_subsys_release, 1014a07b4970SChristoph Hellwig }; 1015a07b4970SChristoph Hellwig 101666603a31SBhumika Goyal static const struct config_item_type nvmet_subsys_type = { 1017a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_subsys_item_ops, 1018a07b4970SChristoph Hellwig .ct_attrs = nvmet_subsys_attrs, 1019a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1020a07b4970SChristoph Hellwig }; 1021a07b4970SChristoph Hellwig 1022a07b4970SChristoph Hellwig static struct config_group *nvmet_subsys_make(struct config_group *group, 1023a07b4970SChristoph Hellwig const char *name) 1024a07b4970SChristoph Hellwig { 1025a07b4970SChristoph Hellwig struct nvmet_subsys *subsys; 1026a07b4970SChristoph Hellwig 1027a07b4970SChristoph Hellwig if (sysfs_streq(name, NVME_DISC_SUBSYS_NAME)) { 1028a07b4970SChristoph Hellwig pr_err("can't create discovery subsystem through configfs\n"); 1029a07b4970SChristoph Hellwig return ERR_PTR(-EINVAL); 1030a07b4970SChristoph Hellwig } 1031a07b4970SChristoph Hellwig 1032a07b4970SChristoph Hellwig subsys = nvmet_subsys_alloc(name, NVME_NQN_NVME); 10336b7e631bSMinwoo Im if (IS_ERR(subsys)) 10346b7e631bSMinwoo Im return ERR_CAST(subsys); 1035a07b4970SChristoph Hellwig 1036a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->group, name, &nvmet_subsys_type); 1037a07b4970SChristoph Hellwig 1038a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->namespaces_group, 1039a07b4970SChristoph Hellwig "namespaces", &nvmet_namespaces_type); 1040a07b4970SChristoph Hellwig configfs_add_default_group(&subsys->namespaces_group, &subsys->group); 1041a07b4970SChristoph Hellwig 1042a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->allowed_hosts_group, 1043a07b4970SChristoph Hellwig "allowed_hosts", &nvmet_allowed_hosts_type); 1044a07b4970SChristoph Hellwig configfs_add_default_group(&subsys->allowed_hosts_group, 1045a07b4970SChristoph Hellwig &subsys->group); 1046a07b4970SChristoph Hellwig 1047a07b4970SChristoph Hellwig return &subsys->group; 1048a07b4970SChristoph Hellwig } 1049a07b4970SChristoph Hellwig 1050a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_subsystems_group_ops = { 1051a07b4970SChristoph Hellwig .make_group = nvmet_subsys_make, 1052a07b4970SChristoph Hellwig }; 1053a07b4970SChristoph Hellwig 105466603a31SBhumika Goyal static const struct config_item_type nvmet_subsystems_type = { 1055a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_subsystems_group_ops, 1056a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1057a07b4970SChristoph Hellwig }; 1058a07b4970SChristoph Hellwig 1059a07b4970SChristoph Hellwig static ssize_t nvmet_referral_enable_show(struct config_item *item, 1060a07b4970SChristoph Hellwig char *page) 1061a07b4970SChristoph Hellwig { 1062a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", to_nvmet_port(item)->enabled); 1063a07b4970SChristoph Hellwig } 1064a07b4970SChristoph Hellwig 1065a07b4970SChristoph Hellwig static ssize_t nvmet_referral_enable_store(struct config_item *item, 1066a07b4970SChristoph Hellwig const char *page, size_t count) 1067a07b4970SChristoph Hellwig { 1068a07b4970SChristoph Hellwig struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); 1069a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1070a07b4970SChristoph Hellwig bool enable; 1071a07b4970SChristoph Hellwig 1072a07b4970SChristoph Hellwig if (strtobool(page, &enable)) 1073a07b4970SChristoph Hellwig goto inval; 1074a07b4970SChristoph Hellwig 1075a07b4970SChristoph Hellwig if (enable) 1076a07b4970SChristoph Hellwig nvmet_referral_enable(parent, port); 1077a07b4970SChristoph Hellwig else 1078b662a078SJay Sternberg nvmet_referral_disable(parent, port); 1079a07b4970SChristoph Hellwig 1080a07b4970SChristoph Hellwig return count; 1081a07b4970SChristoph Hellwig inval: 1082a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for enable\n", page); 1083a07b4970SChristoph Hellwig return -EINVAL; 1084a07b4970SChristoph Hellwig } 1085a07b4970SChristoph Hellwig 1086a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_referral_, enable); 1087a07b4970SChristoph Hellwig 1088a07b4970SChristoph Hellwig /* 1089a07b4970SChristoph Hellwig * Discovery Service subsystem definitions 1090a07b4970SChristoph Hellwig */ 1091a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_referral_attrs[] = { 1092a07b4970SChristoph Hellwig &nvmet_attr_addr_adrfam, 1093a07b4970SChristoph Hellwig &nvmet_attr_addr_portid, 1094a07b4970SChristoph Hellwig &nvmet_attr_addr_treq, 1095a07b4970SChristoph Hellwig &nvmet_attr_addr_traddr, 1096a07b4970SChristoph Hellwig &nvmet_attr_addr_trsvcid, 1097a07b4970SChristoph Hellwig &nvmet_attr_addr_trtype, 1098a07b4970SChristoph Hellwig &nvmet_referral_attr_enable, 1099a07b4970SChristoph Hellwig NULL, 1100a07b4970SChristoph Hellwig }; 1101a07b4970SChristoph Hellwig 1102f0e656e4SSagi Grimberg static void nvmet_referral_notify(struct config_group *group, 1103f0e656e4SSagi Grimberg struct config_item *item) 1104a07b4970SChristoph Hellwig { 1105b662a078SJay Sternberg struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); 1106a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1107a07b4970SChristoph Hellwig 1108b662a078SJay Sternberg nvmet_referral_disable(parent, port); 1109f0e656e4SSagi Grimberg } 1110f0e656e4SSagi Grimberg 1111f0e656e4SSagi Grimberg static void nvmet_referral_release(struct config_item *item) 1112f0e656e4SSagi Grimberg { 1113f0e656e4SSagi Grimberg struct nvmet_port *port = to_nvmet_port(item); 1114f0e656e4SSagi Grimberg 1115a07b4970SChristoph Hellwig kfree(port); 1116a07b4970SChristoph Hellwig } 1117a07b4970SChristoph Hellwig 1118a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_referral_item_ops = { 1119a07b4970SChristoph Hellwig .release = nvmet_referral_release, 1120a07b4970SChristoph Hellwig }; 1121a07b4970SChristoph Hellwig 112266603a31SBhumika Goyal static const struct config_item_type nvmet_referral_type = { 1123a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1124a07b4970SChristoph Hellwig .ct_attrs = nvmet_referral_attrs, 1125a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_referral_item_ops, 1126a07b4970SChristoph Hellwig }; 1127a07b4970SChristoph Hellwig 1128a07b4970SChristoph Hellwig static struct config_group *nvmet_referral_make( 1129a07b4970SChristoph Hellwig struct config_group *group, const char *name) 1130a07b4970SChristoph Hellwig { 1131a07b4970SChristoph Hellwig struct nvmet_port *port; 1132a07b4970SChristoph Hellwig 1133a07b4970SChristoph Hellwig port = kzalloc(sizeof(*port), GFP_KERNEL); 1134a07b4970SChristoph Hellwig if (!port) 1135f98d9ca1SDan Carpenter return ERR_PTR(-ENOMEM); 1136a07b4970SChristoph Hellwig 1137a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->entry); 1138a07b4970SChristoph Hellwig config_group_init_type_name(&port->group, name, &nvmet_referral_type); 1139a07b4970SChristoph Hellwig 1140a07b4970SChristoph Hellwig return &port->group; 1141a07b4970SChristoph Hellwig } 1142a07b4970SChristoph Hellwig 1143a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_referral_group_ops = { 1144a07b4970SChristoph Hellwig .make_group = nvmet_referral_make, 1145f0e656e4SSagi Grimberg .disconnect_notify = nvmet_referral_notify, 1146a07b4970SChristoph Hellwig }; 1147a07b4970SChristoph Hellwig 114866603a31SBhumika Goyal static const struct config_item_type nvmet_referrals_type = { 1149a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1150a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_referral_group_ops, 1151a07b4970SChristoph Hellwig }; 1152a07b4970SChristoph Hellwig 115362ac0d32SChristoph Hellwig static struct { 115462ac0d32SChristoph Hellwig enum nvme_ana_state state; 115562ac0d32SChristoph Hellwig const char *name; 115662ac0d32SChristoph Hellwig } nvmet_ana_state_names[] = { 115762ac0d32SChristoph Hellwig { NVME_ANA_OPTIMIZED, "optimized" }, 115862ac0d32SChristoph Hellwig { NVME_ANA_NONOPTIMIZED, "non-optimized" }, 115962ac0d32SChristoph Hellwig { NVME_ANA_INACCESSIBLE, "inaccessible" }, 116062ac0d32SChristoph Hellwig { NVME_ANA_PERSISTENT_LOSS, "persistent-loss" }, 116162ac0d32SChristoph Hellwig { NVME_ANA_CHANGE, "change" }, 116262ac0d32SChristoph Hellwig }; 116362ac0d32SChristoph Hellwig 116462ac0d32SChristoph Hellwig static ssize_t nvmet_ana_group_ana_state_show(struct config_item *item, 116562ac0d32SChristoph Hellwig char *page) 116662ac0d32SChristoph Hellwig { 116762ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 116862ac0d32SChristoph Hellwig enum nvme_ana_state state = grp->port->ana_state[grp->grpid]; 116962ac0d32SChristoph Hellwig int i; 117062ac0d32SChristoph Hellwig 117162ac0d32SChristoph Hellwig for (i = 0; i < ARRAY_SIZE(nvmet_ana_state_names); i++) { 117262ac0d32SChristoph Hellwig if (state != nvmet_ana_state_names[i].state) 117362ac0d32SChristoph Hellwig continue; 117462ac0d32SChristoph Hellwig return sprintf(page, "%s\n", nvmet_ana_state_names[i].name); 117562ac0d32SChristoph Hellwig } 117662ac0d32SChristoph Hellwig 117762ac0d32SChristoph Hellwig return sprintf(page, "\n"); 117862ac0d32SChristoph Hellwig } 117962ac0d32SChristoph Hellwig 118062ac0d32SChristoph Hellwig static ssize_t nvmet_ana_group_ana_state_store(struct config_item *item, 118162ac0d32SChristoph Hellwig const char *page, size_t count) 118262ac0d32SChristoph Hellwig { 118362ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 118462ac0d32SChristoph Hellwig int i; 118562ac0d32SChristoph Hellwig 118662ac0d32SChristoph Hellwig for (i = 0; i < ARRAY_SIZE(nvmet_ana_state_names); i++) { 118762ac0d32SChristoph Hellwig if (sysfs_streq(page, nvmet_ana_state_names[i].name)) 118862ac0d32SChristoph Hellwig goto found; 118962ac0d32SChristoph Hellwig } 119062ac0d32SChristoph Hellwig 119162ac0d32SChristoph Hellwig pr_err("Invalid value '%s' for ana_state\n", page); 119262ac0d32SChristoph Hellwig return -EINVAL; 119362ac0d32SChristoph Hellwig 119462ac0d32SChristoph Hellwig found: 119562ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 119662ac0d32SChristoph Hellwig grp->port->ana_state[grp->grpid] = nvmet_ana_state_names[i].state; 119762ac0d32SChristoph Hellwig nvmet_ana_chgcnt++; 119862ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 119962ac0d32SChristoph Hellwig 120062ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 120162ac0d32SChristoph Hellwig return count; 120262ac0d32SChristoph Hellwig } 120362ac0d32SChristoph Hellwig 120462ac0d32SChristoph Hellwig CONFIGFS_ATTR(nvmet_ana_group_, ana_state); 120562ac0d32SChristoph Hellwig 120662ac0d32SChristoph Hellwig static struct configfs_attribute *nvmet_ana_group_attrs[] = { 120762ac0d32SChristoph Hellwig &nvmet_ana_group_attr_ana_state, 120862ac0d32SChristoph Hellwig NULL, 120962ac0d32SChristoph Hellwig }; 121062ac0d32SChristoph Hellwig 121162ac0d32SChristoph Hellwig static void nvmet_ana_group_release(struct config_item *item) 121262ac0d32SChristoph Hellwig { 121362ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 121462ac0d32SChristoph Hellwig 121562ac0d32SChristoph Hellwig if (grp == &grp->port->ana_default_group) 121662ac0d32SChristoph Hellwig return; 121762ac0d32SChristoph Hellwig 121862ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 121962ac0d32SChristoph Hellwig grp->port->ana_state[grp->grpid] = NVME_ANA_INACCESSIBLE; 122062ac0d32SChristoph Hellwig nvmet_ana_group_enabled[grp->grpid]--; 122162ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 122262ac0d32SChristoph Hellwig 122362ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 122462ac0d32SChristoph Hellwig kfree(grp); 122562ac0d32SChristoph Hellwig } 122662ac0d32SChristoph Hellwig 122762ac0d32SChristoph Hellwig static struct configfs_item_operations nvmet_ana_group_item_ops = { 122862ac0d32SChristoph Hellwig .release = nvmet_ana_group_release, 122962ac0d32SChristoph Hellwig }; 123062ac0d32SChristoph Hellwig 123162ac0d32SChristoph Hellwig static const struct config_item_type nvmet_ana_group_type = { 123262ac0d32SChristoph Hellwig .ct_item_ops = &nvmet_ana_group_item_ops, 123362ac0d32SChristoph Hellwig .ct_attrs = nvmet_ana_group_attrs, 123462ac0d32SChristoph Hellwig .ct_owner = THIS_MODULE, 123562ac0d32SChristoph Hellwig }; 123662ac0d32SChristoph Hellwig 123762ac0d32SChristoph Hellwig static struct config_group *nvmet_ana_groups_make_group( 123862ac0d32SChristoph Hellwig struct config_group *group, const char *name) 123962ac0d32SChristoph Hellwig { 124062ac0d32SChristoph Hellwig struct nvmet_port *port = ana_groups_to_port(&group->cg_item); 124162ac0d32SChristoph Hellwig struct nvmet_ana_group *grp; 124262ac0d32SChristoph Hellwig u32 grpid; 124362ac0d32SChristoph Hellwig int ret; 124462ac0d32SChristoph Hellwig 124562ac0d32SChristoph Hellwig ret = kstrtou32(name, 0, &grpid); 124662ac0d32SChristoph Hellwig if (ret) 124762ac0d32SChristoph Hellwig goto out; 124862ac0d32SChristoph Hellwig 124962ac0d32SChristoph Hellwig ret = -EINVAL; 125062ac0d32SChristoph Hellwig if (grpid <= 1 || grpid > NVMET_MAX_ANAGRPS) 125162ac0d32SChristoph Hellwig goto out; 125262ac0d32SChristoph Hellwig 125362ac0d32SChristoph Hellwig ret = -ENOMEM; 125462ac0d32SChristoph Hellwig grp = kzalloc(sizeof(*grp), GFP_KERNEL); 125562ac0d32SChristoph Hellwig if (!grp) 125662ac0d32SChristoph Hellwig goto out; 125762ac0d32SChristoph Hellwig grp->port = port; 125862ac0d32SChristoph Hellwig grp->grpid = grpid; 125962ac0d32SChristoph Hellwig 126062ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 126162ac0d32SChristoph Hellwig nvmet_ana_group_enabled[grpid]++; 126262ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 126362ac0d32SChristoph Hellwig 126462ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 126562ac0d32SChristoph Hellwig 126662ac0d32SChristoph Hellwig config_group_init_type_name(&grp->group, name, &nvmet_ana_group_type); 126762ac0d32SChristoph Hellwig return &grp->group; 126862ac0d32SChristoph Hellwig out: 126962ac0d32SChristoph Hellwig return ERR_PTR(ret); 127062ac0d32SChristoph Hellwig } 127162ac0d32SChristoph Hellwig 127262ac0d32SChristoph Hellwig static struct configfs_group_operations nvmet_ana_groups_group_ops = { 127362ac0d32SChristoph Hellwig .make_group = nvmet_ana_groups_make_group, 127462ac0d32SChristoph Hellwig }; 127562ac0d32SChristoph Hellwig 127662ac0d32SChristoph Hellwig static const struct config_item_type nvmet_ana_groups_type = { 127762ac0d32SChristoph Hellwig .ct_group_ops = &nvmet_ana_groups_group_ops, 127862ac0d32SChristoph Hellwig .ct_owner = THIS_MODULE, 127962ac0d32SChristoph Hellwig }; 128062ac0d32SChristoph Hellwig 1281a07b4970SChristoph Hellwig /* 1282a07b4970SChristoph Hellwig * Ports definitions. 1283a07b4970SChristoph Hellwig */ 1284a07b4970SChristoph Hellwig static void nvmet_port_release(struct config_item *item) 1285a07b4970SChristoph Hellwig { 1286a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1287a07b4970SChristoph Hellwig 1288b662a078SJay Sternberg list_del(&port->global_entry); 1289b662a078SJay Sternberg 129072efd25dSChristoph Hellwig kfree(port->ana_state); 1291a07b4970SChristoph Hellwig kfree(port); 1292a07b4970SChristoph Hellwig } 1293a07b4970SChristoph Hellwig 1294a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_port_attrs[] = { 1295a07b4970SChristoph Hellwig &nvmet_attr_addr_adrfam, 1296a07b4970SChristoph Hellwig &nvmet_attr_addr_treq, 1297a07b4970SChristoph Hellwig &nvmet_attr_addr_traddr, 1298a07b4970SChristoph Hellwig &nvmet_attr_addr_trsvcid, 1299a07b4970SChristoph Hellwig &nvmet_attr_addr_trtype, 13000d5ee2b2SSteve Wise &nvmet_attr_param_inline_data_size, 1301a07b4970SChristoph Hellwig NULL, 1302a07b4970SChristoph Hellwig }; 1303a07b4970SChristoph Hellwig 1304a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_port_item_ops = { 1305a07b4970SChristoph Hellwig .release = nvmet_port_release, 1306a07b4970SChristoph Hellwig }; 1307a07b4970SChristoph Hellwig 130866603a31SBhumika Goyal static const struct config_item_type nvmet_port_type = { 1309a07b4970SChristoph Hellwig .ct_attrs = nvmet_port_attrs, 1310a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_port_item_ops, 1311a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1312a07b4970SChristoph Hellwig }; 1313a07b4970SChristoph Hellwig 1314a07b4970SChristoph Hellwig static struct config_group *nvmet_ports_make(struct config_group *group, 1315a07b4970SChristoph Hellwig const char *name) 1316a07b4970SChristoph Hellwig { 1317a07b4970SChristoph Hellwig struct nvmet_port *port; 1318a07b4970SChristoph Hellwig u16 portid; 131962ac0d32SChristoph Hellwig u32 i; 1320a07b4970SChristoph Hellwig 1321a07b4970SChristoph Hellwig if (kstrtou16(name, 0, &portid)) 1322a07b4970SChristoph Hellwig return ERR_PTR(-EINVAL); 1323a07b4970SChristoph Hellwig 1324a07b4970SChristoph Hellwig port = kzalloc(sizeof(*port), GFP_KERNEL); 1325a07b4970SChristoph Hellwig if (!port) 1326f98d9ca1SDan Carpenter return ERR_PTR(-ENOMEM); 1327a07b4970SChristoph Hellwig 132872efd25dSChristoph Hellwig port->ana_state = kcalloc(NVMET_MAX_ANAGRPS + 1, 132972efd25dSChristoph Hellwig sizeof(*port->ana_state), GFP_KERNEL); 133072efd25dSChristoph Hellwig if (!port->ana_state) { 133172efd25dSChristoph Hellwig kfree(port); 133272efd25dSChristoph Hellwig return ERR_PTR(-ENOMEM); 133372efd25dSChristoph Hellwig } 133472efd25dSChristoph Hellwig 133562ac0d32SChristoph Hellwig for (i = 1; i <= NVMET_MAX_ANAGRPS; i++) { 133662ac0d32SChristoph Hellwig if (i == NVMET_DEFAULT_ANA_GRPID) 133762ac0d32SChristoph Hellwig port->ana_state[1] = NVME_ANA_OPTIMIZED; 133862ac0d32SChristoph Hellwig else 133962ac0d32SChristoph Hellwig port->ana_state[i] = NVME_ANA_INACCESSIBLE; 134062ac0d32SChristoph Hellwig } 134172efd25dSChristoph Hellwig 1342b662a078SJay Sternberg list_add(&port->global_entry, &nvmet_ports_list); 1343b662a078SJay Sternberg 1344a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->entry); 1345a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->subsystems); 1346a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->referrals); 13470d5ee2b2SSteve Wise port->inline_data_size = -1; /* < 0 == let the transport choose */ 1348a07b4970SChristoph Hellwig 1349a07b4970SChristoph Hellwig port->disc_addr.portid = cpu_to_le16(portid); 13509b95d2fbSSagi Grimberg port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW; 1351a07b4970SChristoph Hellwig config_group_init_type_name(&port->group, name, &nvmet_port_type); 1352a07b4970SChristoph Hellwig 1353a07b4970SChristoph Hellwig config_group_init_type_name(&port->subsys_group, 1354a07b4970SChristoph Hellwig "subsystems", &nvmet_port_subsys_type); 1355a07b4970SChristoph Hellwig configfs_add_default_group(&port->subsys_group, &port->group); 1356a07b4970SChristoph Hellwig 1357a07b4970SChristoph Hellwig config_group_init_type_name(&port->referrals_group, 1358a07b4970SChristoph Hellwig "referrals", &nvmet_referrals_type); 1359a07b4970SChristoph Hellwig configfs_add_default_group(&port->referrals_group, &port->group); 1360a07b4970SChristoph Hellwig 136162ac0d32SChristoph Hellwig config_group_init_type_name(&port->ana_groups_group, 136262ac0d32SChristoph Hellwig "ana_groups", &nvmet_ana_groups_type); 136362ac0d32SChristoph Hellwig configfs_add_default_group(&port->ana_groups_group, &port->group); 136462ac0d32SChristoph Hellwig 136562ac0d32SChristoph Hellwig port->ana_default_group.port = port; 136662ac0d32SChristoph Hellwig port->ana_default_group.grpid = NVMET_DEFAULT_ANA_GRPID; 136762ac0d32SChristoph Hellwig config_group_init_type_name(&port->ana_default_group.group, 136862ac0d32SChristoph Hellwig __stringify(NVMET_DEFAULT_ANA_GRPID), 136962ac0d32SChristoph Hellwig &nvmet_ana_group_type); 137062ac0d32SChristoph Hellwig configfs_add_default_group(&port->ana_default_group.group, 137162ac0d32SChristoph Hellwig &port->ana_groups_group); 137262ac0d32SChristoph Hellwig 1373a07b4970SChristoph Hellwig return &port->group; 1374a07b4970SChristoph Hellwig } 1375a07b4970SChristoph Hellwig 1376a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_ports_group_ops = { 1377a07b4970SChristoph Hellwig .make_group = nvmet_ports_make, 1378a07b4970SChristoph Hellwig }; 1379a07b4970SChristoph Hellwig 138066603a31SBhumika Goyal static const struct config_item_type nvmet_ports_type = { 1381a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_ports_group_ops, 1382a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1383a07b4970SChristoph Hellwig }; 1384a07b4970SChristoph Hellwig 1385a07b4970SChristoph Hellwig static struct config_group nvmet_subsystems_group; 1386a07b4970SChristoph Hellwig static struct config_group nvmet_ports_group; 1387a07b4970SChristoph Hellwig 1388a07b4970SChristoph Hellwig static void nvmet_host_release(struct config_item *item) 1389a07b4970SChristoph Hellwig { 1390a07b4970SChristoph Hellwig struct nvmet_host *host = to_host(item); 1391a07b4970SChristoph Hellwig 1392a07b4970SChristoph Hellwig kfree(host); 1393a07b4970SChristoph Hellwig } 1394a07b4970SChristoph Hellwig 1395a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_host_item_ops = { 1396a07b4970SChristoph Hellwig .release = nvmet_host_release, 1397a07b4970SChristoph Hellwig }; 1398a07b4970SChristoph Hellwig 139966603a31SBhumika Goyal static const struct config_item_type nvmet_host_type = { 1400a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_host_item_ops, 1401a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1402a07b4970SChristoph Hellwig }; 1403a07b4970SChristoph Hellwig 1404a07b4970SChristoph Hellwig static struct config_group *nvmet_hosts_make_group(struct config_group *group, 1405a07b4970SChristoph Hellwig const char *name) 1406a07b4970SChristoph Hellwig { 1407a07b4970SChristoph Hellwig struct nvmet_host *host; 1408a07b4970SChristoph Hellwig 1409a07b4970SChristoph Hellwig host = kzalloc(sizeof(*host), GFP_KERNEL); 1410a07b4970SChristoph Hellwig if (!host) 1411a07b4970SChristoph Hellwig return ERR_PTR(-ENOMEM); 1412a07b4970SChristoph Hellwig 1413a07b4970SChristoph Hellwig config_group_init_type_name(&host->group, name, &nvmet_host_type); 1414a07b4970SChristoph Hellwig 1415a07b4970SChristoph Hellwig return &host->group; 1416a07b4970SChristoph Hellwig } 1417a07b4970SChristoph Hellwig 1418a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_hosts_group_ops = { 1419a07b4970SChristoph Hellwig .make_group = nvmet_hosts_make_group, 1420a07b4970SChristoph Hellwig }; 1421a07b4970SChristoph Hellwig 142266603a31SBhumika Goyal static const struct config_item_type nvmet_hosts_type = { 1423a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_hosts_group_ops, 1424a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1425a07b4970SChristoph Hellwig }; 1426a07b4970SChristoph Hellwig 1427a07b4970SChristoph Hellwig static struct config_group nvmet_hosts_group; 1428a07b4970SChristoph Hellwig 142966603a31SBhumika Goyal static const struct config_item_type nvmet_root_type = { 1430a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1431a07b4970SChristoph Hellwig }; 1432a07b4970SChristoph Hellwig 1433a07b4970SChristoph Hellwig static struct configfs_subsystem nvmet_configfs_subsystem = { 1434a07b4970SChristoph Hellwig .su_group = { 1435a07b4970SChristoph Hellwig .cg_item = { 1436a07b4970SChristoph Hellwig .ci_namebuf = "nvmet", 1437a07b4970SChristoph Hellwig .ci_type = &nvmet_root_type, 1438a07b4970SChristoph Hellwig }, 1439a07b4970SChristoph Hellwig }, 1440a07b4970SChristoph Hellwig }; 1441a07b4970SChristoph Hellwig 1442a07b4970SChristoph Hellwig int __init nvmet_init_configfs(void) 1443a07b4970SChristoph Hellwig { 1444a07b4970SChristoph Hellwig int ret; 1445a07b4970SChristoph Hellwig 1446a07b4970SChristoph Hellwig config_group_init(&nvmet_configfs_subsystem.su_group); 1447a07b4970SChristoph Hellwig mutex_init(&nvmet_configfs_subsystem.su_mutex); 1448a07b4970SChristoph Hellwig 1449a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_subsystems_group, 1450a07b4970SChristoph Hellwig "subsystems", &nvmet_subsystems_type); 1451a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_subsystems_group, 1452a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1453a07b4970SChristoph Hellwig 1454a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_ports_group, 1455a07b4970SChristoph Hellwig "ports", &nvmet_ports_type); 1456a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_ports_group, 1457a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1458a07b4970SChristoph Hellwig 1459a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_hosts_group, 1460a07b4970SChristoph Hellwig "hosts", &nvmet_hosts_type); 1461a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_hosts_group, 1462a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1463a07b4970SChristoph Hellwig 1464a07b4970SChristoph Hellwig ret = configfs_register_subsystem(&nvmet_configfs_subsystem); 1465a07b4970SChristoph Hellwig if (ret) { 1466a07b4970SChristoph Hellwig pr_err("configfs_register_subsystem: %d\n", ret); 1467a07b4970SChristoph Hellwig return ret; 1468a07b4970SChristoph Hellwig } 1469a07b4970SChristoph Hellwig 1470a07b4970SChristoph Hellwig return 0; 1471a07b4970SChristoph Hellwig } 1472a07b4970SChristoph Hellwig 1473a07b4970SChristoph Hellwig void __exit nvmet_exit_configfs(void) 1474a07b4970SChristoph Hellwig { 1475a07b4970SChristoph Hellwig configfs_unregister_subsystem(&nvmet_configfs_subsystem); 1476a07b4970SChristoph Hellwig } 1477