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 357e764179SChaitanya Kulkarni static const struct nvmet_type_name_map nvmet_addr_family[] = { 367e764179SChaitanya Kulkarni { NVMF_ADDR_FAMILY_PCI, "pcie" }, 377e764179SChaitanya Kulkarni { NVMF_ADDR_FAMILY_IP4, "ipv4" }, 387e764179SChaitanya Kulkarni { NVMF_ADDR_FAMILY_IP6, "ipv6" }, 397e764179SChaitanya Kulkarni { NVMF_ADDR_FAMILY_IB, "ib" }, 407e764179SChaitanya Kulkarni { NVMF_ADDR_FAMILY_FC, "fc" }, 417e764179SChaitanya Kulkarni }; 427e764179SChaitanya Kulkarni 43a07b4970SChristoph Hellwig /* 44a07b4970SChristoph Hellwig * nvmet_port Generic ConfigFS definitions. 45a07b4970SChristoph Hellwig * Used in any place in the ConfigFS tree that refers to an address. 46a07b4970SChristoph Hellwig */ 477e764179SChaitanya Kulkarni static ssize_t nvmet_addr_adrfam_show(struct config_item *item, char *page) 48a07b4970SChristoph Hellwig { 497e764179SChaitanya Kulkarni u8 adrfam = to_nvmet_port(item)->disc_addr.adrfam; 507e764179SChaitanya Kulkarni int i; 517e764179SChaitanya Kulkarni 527e764179SChaitanya Kulkarni for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { 537e764179SChaitanya Kulkarni if (nvmet_addr_family[i].type == adrfam) 547e764179SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_addr_family[i].name); 55a07b4970SChristoph Hellwig } 567e764179SChaitanya Kulkarni 577e764179SChaitanya Kulkarni return sprintf(page, "\n"); 58a07b4970SChristoph Hellwig } 59a07b4970SChristoph Hellwig 60a07b4970SChristoph Hellwig static ssize_t nvmet_addr_adrfam_store(struct config_item *item, 61a07b4970SChristoph Hellwig const char *page, size_t count) 62a07b4970SChristoph Hellwig { 63a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 647e764179SChaitanya Kulkarni int i; 65a07b4970SChristoph Hellwig 66a07b4970SChristoph Hellwig if (port->enabled) { 67a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 68a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 69a07b4970SChristoph Hellwig return -EACCES; 70a07b4970SChristoph Hellwig } 71a07b4970SChristoph Hellwig 727e764179SChaitanya Kulkarni for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { 737e764179SChaitanya Kulkarni if (sysfs_streq(page, nvmet_addr_family[i].name)) 747e764179SChaitanya Kulkarni goto found; 75a07b4970SChristoph Hellwig } 76a07b4970SChristoph Hellwig 777e764179SChaitanya Kulkarni pr_err("Invalid value '%s' for adrfam\n", page); 787e764179SChaitanya Kulkarni return -EINVAL; 797e764179SChaitanya Kulkarni 807e764179SChaitanya Kulkarni found: 817e764179SChaitanya Kulkarni port->disc_addr.adrfam = i; 82a07b4970SChristoph Hellwig return count; 83a07b4970SChristoph Hellwig } 84a07b4970SChristoph Hellwig 85a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_adrfam); 86a07b4970SChristoph Hellwig 87a07b4970SChristoph Hellwig static ssize_t nvmet_addr_portid_show(struct config_item *item, 88a07b4970SChristoph Hellwig char *page) 89a07b4970SChristoph Hellwig { 90a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 91a07b4970SChristoph Hellwig 92a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", 93a07b4970SChristoph Hellwig le16_to_cpu(port->disc_addr.portid)); 94a07b4970SChristoph Hellwig } 95a07b4970SChristoph Hellwig 96a07b4970SChristoph Hellwig static ssize_t nvmet_addr_portid_store(struct config_item *item, 97a07b4970SChristoph Hellwig const char *page, size_t count) 98a07b4970SChristoph Hellwig { 99a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 100a07b4970SChristoph Hellwig u16 portid = 0; 101a07b4970SChristoph Hellwig 102a07b4970SChristoph Hellwig if (kstrtou16(page, 0, &portid)) { 103a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for portid\n", page); 104a07b4970SChristoph Hellwig return -EINVAL; 105a07b4970SChristoph Hellwig } 106a07b4970SChristoph Hellwig 107a07b4970SChristoph Hellwig if (port->enabled) { 108a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 109a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 110a07b4970SChristoph Hellwig return -EACCES; 111a07b4970SChristoph Hellwig } 112a07b4970SChristoph Hellwig port->disc_addr.portid = cpu_to_le16(portid); 113a07b4970SChristoph Hellwig return count; 114a07b4970SChristoph Hellwig } 115a07b4970SChristoph Hellwig 116a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_portid); 117a07b4970SChristoph Hellwig 118a07b4970SChristoph Hellwig static ssize_t nvmet_addr_traddr_show(struct config_item *item, 119a07b4970SChristoph Hellwig char *page) 120a07b4970SChristoph Hellwig { 121a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 122a07b4970SChristoph Hellwig 123a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%s\n", 124a07b4970SChristoph Hellwig port->disc_addr.traddr); 125a07b4970SChristoph Hellwig } 126a07b4970SChristoph Hellwig 127a07b4970SChristoph Hellwig static ssize_t nvmet_addr_traddr_store(struct config_item *item, 128a07b4970SChristoph Hellwig const char *page, size_t count) 129a07b4970SChristoph Hellwig { 130a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 131a07b4970SChristoph Hellwig 132a07b4970SChristoph Hellwig if (count > NVMF_TRADDR_SIZE) { 133a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for traddr\n", page); 134a07b4970SChristoph Hellwig return -EINVAL; 135a07b4970SChristoph Hellwig } 136a07b4970SChristoph Hellwig 137a07b4970SChristoph Hellwig if (port->enabled) { 138a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 139a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 140a07b4970SChristoph Hellwig return -EACCES; 141a07b4970SChristoph Hellwig } 1429ba2a5cbSSagi Grimberg 1439ba2a5cbSSagi Grimberg if (sscanf(page, "%s\n", port->disc_addr.traddr) != 1) 1449ba2a5cbSSagi Grimberg return -EINVAL; 1459ba2a5cbSSagi Grimberg return count; 146a07b4970SChristoph Hellwig } 147a07b4970SChristoph Hellwig 148a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_traddr); 149a07b4970SChristoph Hellwig 150a07b4970SChristoph Hellwig static ssize_t nvmet_addr_treq_show(struct config_item *item, 151a07b4970SChristoph Hellwig char *page) 152a07b4970SChristoph Hellwig { 1530445e1b5SSagi Grimberg switch (to_nvmet_port(item)->disc_addr.treq & 1540445e1b5SSagi Grimberg NVME_TREQ_SECURE_CHANNEL_MASK) { 155a07b4970SChristoph Hellwig case NVMF_TREQ_NOT_SPECIFIED: 156a07b4970SChristoph Hellwig return sprintf(page, "not specified\n"); 157a07b4970SChristoph Hellwig case NVMF_TREQ_REQUIRED: 158a07b4970SChristoph Hellwig return sprintf(page, "required\n"); 159a07b4970SChristoph Hellwig case NVMF_TREQ_NOT_REQUIRED: 160a07b4970SChristoph Hellwig return sprintf(page, "not required\n"); 161a07b4970SChristoph Hellwig default: 162a07b4970SChristoph Hellwig return sprintf(page, "\n"); 163a07b4970SChristoph Hellwig } 164a07b4970SChristoph Hellwig } 165a07b4970SChristoph Hellwig 166a07b4970SChristoph Hellwig static ssize_t nvmet_addr_treq_store(struct config_item *item, 167a07b4970SChristoph Hellwig const char *page, size_t count) 168a07b4970SChristoph Hellwig { 169a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1700445e1b5SSagi Grimberg u8 treq = port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK; 171a07b4970SChristoph Hellwig 172a07b4970SChristoph Hellwig if (port->enabled) { 173a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 174a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 175a07b4970SChristoph Hellwig return -EACCES; 176a07b4970SChristoph Hellwig } 177a07b4970SChristoph Hellwig 178a07b4970SChristoph Hellwig if (sysfs_streq(page, "not specified")) { 1790445e1b5SSagi Grimberg treq |= NVMF_TREQ_NOT_SPECIFIED; 180a07b4970SChristoph Hellwig } else if (sysfs_streq(page, "required")) { 1810445e1b5SSagi Grimberg treq |= NVMF_TREQ_REQUIRED; 182a07b4970SChristoph Hellwig } else if (sysfs_streq(page, "not required")) { 1830445e1b5SSagi Grimberg treq |= NVMF_TREQ_NOT_REQUIRED; 184a07b4970SChristoph Hellwig } else { 185a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for treq\n", page); 186a07b4970SChristoph Hellwig return -EINVAL; 187a07b4970SChristoph Hellwig } 1880445e1b5SSagi Grimberg port->disc_addr.treq = treq; 189a07b4970SChristoph Hellwig 190a07b4970SChristoph Hellwig return count; 191a07b4970SChristoph Hellwig } 192a07b4970SChristoph Hellwig 193a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_treq); 194a07b4970SChristoph Hellwig 195a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trsvcid_show(struct config_item *item, 196a07b4970SChristoph Hellwig char *page) 197a07b4970SChristoph Hellwig { 198a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 199a07b4970SChristoph Hellwig 200a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%s\n", 201a07b4970SChristoph Hellwig port->disc_addr.trsvcid); 202a07b4970SChristoph Hellwig } 203a07b4970SChristoph Hellwig 204a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trsvcid_store(struct config_item *item, 205a07b4970SChristoph Hellwig const char *page, size_t count) 206a07b4970SChristoph Hellwig { 207a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 208a07b4970SChristoph Hellwig 209a07b4970SChristoph Hellwig if (count > NVMF_TRSVCID_SIZE) { 210a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for trsvcid\n", page); 211a07b4970SChristoph Hellwig return -EINVAL; 212a07b4970SChristoph Hellwig } 213a07b4970SChristoph Hellwig if (port->enabled) { 214a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 215a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 216a07b4970SChristoph Hellwig return -EACCES; 217a07b4970SChristoph Hellwig } 2189ba2a5cbSSagi Grimberg 2199ba2a5cbSSagi Grimberg if (sscanf(page, "%s\n", port->disc_addr.trsvcid) != 1) 2209ba2a5cbSSagi Grimberg return -EINVAL; 2219ba2a5cbSSagi Grimberg return count; 222a07b4970SChristoph Hellwig } 223a07b4970SChristoph Hellwig 224a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_trsvcid); 225a07b4970SChristoph Hellwig 2260d5ee2b2SSteve Wise static ssize_t nvmet_param_inline_data_size_show(struct config_item *item, 2270d5ee2b2SSteve Wise char *page) 2280d5ee2b2SSteve Wise { 2290d5ee2b2SSteve Wise struct nvmet_port *port = to_nvmet_port(item); 2300d5ee2b2SSteve Wise 2310d5ee2b2SSteve Wise return snprintf(page, PAGE_SIZE, "%d\n", port->inline_data_size); 2320d5ee2b2SSteve Wise } 2330d5ee2b2SSteve Wise 2340d5ee2b2SSteve Wise static ssize_t nvmet_param_inline_data_size_store(struct config_item *item, 2350d5ee2b2SSteve Wise const char *page, size_t count) 2360d5ee2b2SSteve Wise { 2370d5ee2b2SSteve Wise struct nvmet_port *port = to_nvmet_port(item); 2380d5ee2b2SSteve Wise int ret; 2390d5ee2b2SSteve Wise 2400d5ee2b2SSteve Wise if (port->enabled) { 2410d5ee2b2SSteve Wise pr_err("Cannot modify inline_data_size while port enabled\n"); 2420d5ee2b2SSteve Wise pr_err("Disable the port before modifying\n"); 2430d5ee2b2SSteve Wise return -EACCES; 2440d5ee2b2SSteve Wise } 2450d5ee2b2SSteve Wise ret = kstrtoint(page, 0, &port->inline_data_size); 2460d5ee2b2SSteve Wise if (ret) { 2470d5ee2b2SSteve Wise pr_err("Invalid value '%s' for inline_data_size\n", page); 2480d5ee2b2SSteve Wise return -EINVAL; 2490d5ee2b2SSteve Wise } 2500d5ee2b2SSteve Wise return count; 2510d5ee2b2SSteve Wise } 2520d5ee2b2SSteve Wise 2530d5ee2b2SSteve Wise CONFIGFS_ATTR(nvmet_, param_inline_data_size); 2540d5ee2b2SSteve Wise 255a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trtype_show(struct config_item *item, 256a07b4970SChristoph Hellwig char *page) 257a07b4970SChristoph Hellwig { 258a5d18612SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 259a5d18612SChristoph Hellwig int i; 260a5d18612SChristoph Hellwig 26145e2f3c2SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { 26245e2f3c2SChaitanya Kulkarni if (port->disc_addr.trtype == nvmet_transport[i].type) 26345e2f3c2SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_transport[i].name); 264a07b4970SChristoph Hellwig } 265a5d18612SChristoph Hellwig 266a5d18612SChristoph Hellwig return sprintf(page, "\n"); 267a07b4970SChristoph Hellwig } 268a07b4970SChristoph Hellwig 269a07b4970SChristoph Hellwig static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) 270a07b4970SChristoph Hellwig { 271a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED; 272a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED; 273a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM; 274a07b4970SChristoph Hellwig } 275a07b4970SChristoph Hellwig 276a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trtype_store(struct config_item *item, 277a07b4970SChristoph Hellwig const char *page, size_t count) 278a07b4970SChristoph Hellwig { 279a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 280a5d18612SChristoph Hellwig int i; 281a07b4970SChristoph Hellwig 282a07b4970SChristoph Hellwig if (port->enabled) { 283a07b4970SChristoph Hellwig pr_err("Cannot modify address while enabled\n"); 284a07b4970SChristoph Hellwig pr_err("Disable the address before modifying\n"); 285a07b4970SChristoph Hellwig return -EACCES; 286a07b4970SChristoph Hellwig } 287a07b4970SChristoph Hellwig 28845e2f3c2SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { 28945e2f3c2SChaitanya Kulkarni if (sysfs_streq(page, nvmet_transport[i].name)) 290a5d18612SChristoph Hellwig goto found; 291a07b4970SChristoph Hellwig } 292a07b4970SChristoph Hellwig 293a5d18612SChristoph Hellwig pr_err("Invalid value '%s' for trtype\n", page); 294a5d18612SChristoph Hellwig return -EINVAL; 2957e764179SChaitanya Kulkarni 296a5d18612SChristoph Hellwig found: 297a5d18612SChristoph Hellwig memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); 29845e2f3c2SChaitanya Kulkarni port->disc_addr.trtype = nvmet_transport[i].type; 299a5d18612SChristoph Hellwig if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) 300a5d18612SChristoph Hellwig nvmet_port_init_tsas_rdma(port); 301a07b4970SChristoph Hellwig return count; 302a07b4970SChristoph Hellwig } 303a07b4970SChristoph Hellwig 304a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_trtype); 305a07b4970SChristoph Hellwig 306a07b4970SChristoph Hellwig /* 307a07b4970SChristoph Hellwig * Namespace structures & file operation functions below 308a07b4970SChristoph Hellwig */ 309a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page) 310a07b4970SChristoph Hellwig { 311a07b4970SChristoph Hellwig return sprintf(page, "%s\n", to_nvmet_ns(item)->device_path); 312a07b4970SChristoph Hellwig } 313a07b4970SChristoph Hellwig 314a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_path_store(struct config_item *item, 315a07b4970SChristoph Hellwig const char *page, size_t count) 316a07b4970SChristoph Hellwig { 317a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 318a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = ns->subsys; 3195613d312SHannes Reinecke size_t len; 320a07b4970SChristoph Hellwig int ret; 321a07b4970SChristoph Hellwig 322a07b4970SChristoph Hellwig mutex_lock(&subsys->lock); 323a07b4970SChristoph Hellwig ret = -EBUSY; 324e4fcf07cSSolganik Alexander if (ns->enabled) 325a07b4970SChristoph Hellwig goto out_unlock; 326a07b4970SChristoph Hellwig 3275613d312SHannes Reinecke ret = -EINVAL; 3285613d312SHannes Reinecke len = strcspn(page, "\n"); 3295613d312SHannes Reinecke if (!len) 3305613d312SHannes Reinecke goto out_unlock; 331a07b4970SChristoph Hellwig 3325613d312SHannes Reinecke kfree(ns->device_path); 333a07b4970SChristoph Hellwig ret = -ENOMEM; 3345613d312SHannes Reinecke ns->device_path = kstrndup(page, len, GFP_KERNEL); 335a07b4970SChristoph Hellwig if (!ns->device_path) 336a07b4970SChristoph Hellwig goto out_unlock; 337a07b4970SChristoph Hellwig 338a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 339a07b4970SChristoph Hellwig return count; 340a07b4970SChristoph Hellwig 341a07b4970SChristoph Hellwig out_unlock: 342a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 343a07b4970SChristoph Hellwig return ret; 344a07b4970SChristoph Hellwig } 345a07b4970SChristoph Hellwig 346a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, device_path); 347a07b4970SChristoph Hellwig 348c6925093SLogan Gunthorpe #ifdef CONFIG_PCI_P2PDMA 349c6925093SLogan Gunthorpe static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page) 350c6925093SLogan Gunthorpe { 351c6925093SLogan Gunthorpe struct nvmet_ns *ns = to_nvmet_ns(item); 352c6925093SLogan Gunthorpe 353c6925093SLogan Gunthorpe return pci_p2pdma_enable_show(page, ns->p2p_dev, ns->use_p2pmem); 354c6925093SLogan Gunthorpe } 355c6925093SLogan Gunthorpe 356c6925093SLogan Gunthorpe static ssize_t nvmet_ns_p2pmem_store(struct config_item *item, 357c6925093SLogan Gunthorpe const char *page, size_t count) 358c6925093SLogan Gunthorpe { 359c6925093SLogan Gunthorpe struct nvmet_ns *ns = to_nvmet_ns(item); 360c6925093SLogan Gunthorpe struct pci_dev *p2p_dev = NULL; 361c6925093SLogan Gunthorpe bool use_p2pmem; 362c6925093SLogan Gunthorpe int ret = count; 363c6925093SLogan Gunthorpe int error; 364c6925093SLogan Gunthorpe 365c6925093SLogan Gunthorpe mutex_lock(&ns->subsys->lock); 366c6925093SLogan Gunthorpe if (ns->enabled) { 367c6925093SLogan Gunthorpe ret = -EBUSY; 368c6925093SLogan Gunthorpe goto out_unlock; 369c6925093SLogan Gunthorpe } 370c6925093SLogan Gunthorpe 371c6925093SLogan Gunthorpe error = pci_p2pdma_enable_store(page, &p2p_dev, &use_p2pmem); 372c6925093SLogan Gunthorpe if (error) { 373c6925093SLogan Gunthorpe ret = error; 374c6925093SLogan Gunthorpe goto out_unlock; 375c6925093SLogan Gunthorpe } 376c6925093SLogan Gunthorpe 377c6925093SLogan Gunthorpe ns->use_p2pmem = use_p2pmem; 378c6925093SLogan Gunthorpe pci_dev_put(ns->p2p_dev); 379c6925093SLogan Gunthorpe ns->p2p_dev = p2p_dev; 380c6925093SLogan Gunthorpe 381c6925093SLogan Gunthorpe out_unlock: 382c6925093SLogan Gunthorpe mutex_unlock(&ns->subsys->lock); 383c6925093SLogan Gunthorpe 384c6925093SLogan Gunthorpe return ret; 385c6925093SLogan Gunthorpe } 386c6925093SLogan Gunthorpe 387c6925093SLogan Gunthorpe CONFIGFS_ATTR(nvmet_ns_, p2pmem); 388c6925093SLogan Gunthorpe #endif /* CONFIG_PCI_P2PDMA */ 389c6925093SLogan Gunthorpe 390430c7befSJohannes Thumshirn static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page) 391430c7befSJohannes Thumshirn { 392430c7befSJohannes Thumshirn return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid); 393430c7befSJohannes Thumshirn } 394430c7befSJohannes Thumshirn 395430c7befSJohannes Thumshirn static ssize_t nvmet_ns_device_uuid_store(struct config_item *item, 396430c7befSJohannes Thumshirn const char *page, size_t count) 397430c7befSJohannes Thumshirn { 398430c7befSJohannes Thumshirn struct nvmet_ns *ns = to_nvmet_ns(item); 399430c7befSJohannes Thumshirn struct nvmet_subsys *subsys = ns->subsys; 400430c7befSJohannes Thumshirn int ret = 0; 401430c7befSJohannes Thumshirn 402430c7befSJohannes Thumshirn mutex_lock(&subsys->lock); 403430c7befSJohannes Thumshirn if (ns->enabled) { 404430c7befSJohannes Thumshirn ret = -EBUSY; 405430c7befSJohannes Thumshirn goto out_unlock; 406430c7befSJohannes Thumshirn } 407430c7befSJohannes Thumshirn 408430c7befSJohannes Thumshirn if (uuid_parse(page, &ns->uuid)) 409430c7befSJohannes Thumshirn ret = -EINVAL; 410430c7befSJohannes Thumshirn 411430c7befSJohannes Thumshirn out_unlock: 412430c7befSJohannes Thumshirn mutex_unlock(&subsys->lock); 413430c7befSJohannes Thumshirn return ret ? ret : count; 414430c7befSJohannes Thumshirn } 415430c7befSJohannes Thumshirn 416f871749aSMax Gurtovoy CONFIGFS_ATTR(nvmet_ns_, device_uuid); 417f871749aSMax Gurtovoy 418a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page) 419a07b4970SChristoph Hellwig { 420a07b4970SChristoph Hellwig return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid); 421a07b4970SChristoph Hellwig } 422a07b4970SChristoph Hellwig 423a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_nguid_store(struct config_item *item, 424a07b4970SChristoph Hellwig const char *page, size_t count) 425a07b4970SChristoph Hellwig { 426a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 427a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = ns->subsys; 428a07b4970SChristoph Hellwig u8 nguid[16]; 429a07b4970SChristoph Hellwig const char *p = page; 430a07b4970SChristoph Hellwig int i; 431a07b4970SChristoph Hellwig int ret = 0; 432a07b4970SChristoph Hellwig 433a07b4970SChristoph Hellwig mutex_lock(&subsys->lock); 434e4fcf07cSSolganik Alexander if (ns->enabled) { 435a07b4970SChristoph Hellwig ret = -EBUSY; 436a07b4970SChristoph Hellwig goto out_unlock; 437a07b4970SChristoph Hellwig } 438a07b4970SChristoph Hellwig 439a07b4970SChristoph Hellwig for (i = 0; i < 16; i++) { 440a07b4970SChristoph Hellwig if (p + 2 > page + count) { 441a07b4970SChristoph Hellwig ret = -EINVAL; 442a07b4970SChristoph Hellwig goto out_unlock; 443a07b4970SChristoph Hellwig } 444a07b4970SChristoph Hellwig if (!isxdigit(p[0]) || !isxdigit(p[1])) { 445a07b4970SChristoph Hellwig ret = -EINVAL; 446a07b4970SChristoph Hellwig goto out_unlock; 447a07b4970SChristoph Hellwig } 448a07b4970SChristoph Hellwig 449a07b4970SChristoph Hellwig nguid[i] = (hex_to_bin(p[0]) << 4) | hex_to_bin(p[1]); 450a07b4970SChristoph Hellwig p += 2; 451a07b4970SChristoph Hellwig 452a07b4970SChristoph Hellwig if (*p == '-' || *p == ':') 453a07b4970SChristoph Hellwig p++; 454a07b4970SChristoph Hellwig } 455a07b4970SChristoph Hellwig 456a07b4970SChristoph Hellwig memcpy(&ns->nguid, nguid, sizeof(nguid)); 457a07b4970SChristoph Hellwig out_unlock: 458a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 459a07b4970SChristoph Hellwig return ret ? ret : count; 460a07b4970SChristoph Hellwig } 461a07b4970SChristoph Hellwig 462a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, device_nguid); 463a07b4970SChristoph Hellwig 46462ac0d32SChristoph Hellwig static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page) 46562ac0d32SChristoph Hellwig { 46662ac0d32SChristoph Hellwig return sprintf(page, "%u\n", to_nvmet_ns(item)->anagrpid); 46762ac0d32SChristoph Hellwig } 46862ac0d32SChristoph Hellwig 46962ac0d32SChristoph Hellwig static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item, 47062ac0d32SChristoph Hellwig const char *page, size_t count) 47162ac0d32SChristoph Hellwig { 47262ac0d32SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 47362ac0d32SChristoph Hellwig u32 oldgrpid, newgrpid; 47462ac0d32SChristoph Hellwig int ret; 47562ac0d32SChristoph Hellwig 47662ac0d32SChristoph Hellwig ret = kstrtou32(page, 0, &newgrpid); 47762ac0d32SChristoph Hellwig if (ret) 47862ac0d32SChristoph Hellwig return ret; 47962ac0d32SChristoph Hellwig 48062ac0d32SChristoph Hellwig if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS) 48162ac0d32SChristoph Hellwig return -EINVAL; 48262ac0d32SChristoph Hellwig 48362ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 48462ac0d32SChristoph Hellwig oldgrpid = ns->anagrpid; 48562ac0d32SChristoph Hellwig nvmet_ana_group_enabled[newgrpid]++; 48662ac0d32SChristoph Hellwig ns->anagrpid = newgrpid; 48762ac0d32SChristoph Hellwig nvmet_ana_group_enabled[oldgrpid]--; 48862ac0d32SChristoph Hellwig nvmet_ana_chgcnt++; 48962ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 49062ac0d32SChristoph Hellwig 49162ac0d32SChristoph Hellwig nvmet_send_ana_event(ns->subsys, NULL); 49262ac0d32SChristoph Hellwig return count; 49362ac0d32SChristoph Hellwig } 49462ac0d32SChristoph Hellwig 49562ac0d32SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, ana_grpid); 49662ac0d32SChristoph Hellwig 497a07b4970SChristoph Hellwig static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page) 498a07b4970SChristoph Hellwig { 499e4fcf07cSSolganik Alexander return sprintf(page, "%d\n", to_nvmet_ns(item)->enabled); 500a07b4970SChristoph Hellwig } 501a07b4970SChristoph Hellwig 502a07b4970SChristoph Hellwig static ssize_t nvmet_ns_enable_store(struct config_item *item, 503a07b4970SChristoph Hellwig const char *page, size_t count) 504a07b4970SChristoph Hellwig { 505a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 506a07b4970SChristoph Hellwig bool enable; 507a07b4970SChristoph Hellwig int ret = 0; 508a07b4970SChristoph Hellwig 509a07b4970SChristoph Hellwig if (strtobool(page, &enable)) 510a07b4970SChristoph Hellwig return -EINVAL; 511a07b4970SChristoph Hellwig 512a07b4970SChristoph Hellwig if (enable) 513a07b4970SChristoph Hellwig ret = nvmet_ns_enable(ns); 514a07b4970SChristoph Hellwig else 515a07b4970SChristoph Hellwig nvmet_ns_disable(ns); 516a07b4970SChristoph Hellwig 517a07b4970SChristoph Hellwig return ret ? ret : count; 518a07b4970SChristoph Hellwig } 519a07b4970SChristoph Hellwig 520a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, enable); 521a07b4970SChristoph Hellwig 52255eb942eSChaitanya Kulkarni static ssize_t nvmet_ns_buffered_io_show(struct config_item *item, char *page) 52355eb942eSChaitanya Kulkarni { 52455eb942eSChaitanya Kulkarni return sprintf(page, "%d\n", to_nvmet_ns(item)->buffered_io); 52555eb942eSChaitanya Kulkarni } 52655eb942eSChaitanya Kulkarni 52755eb942eSChaitanya Kulkarni static ssize_t nvmet_ns_buffered_io_store(struct config_item *item, 52855eb942eSChaitanya Kulkarni const char *page, size_t count) 52955eb942eSChaitanya Kulkarni { 53055eb942eSChaitanya Kulkarni struct nvmet_ns *ns = to_nvmet_ns(item); 53155eb942eSChaitanya Kulkarni bool val; 53255eb942eSChaitanya Kulkarni 53355eb942eSChaitanya Kulkarni if (strtobool(page, &val)) 53455eb942eSChaitanya Kulkarni return -EINVAL; 53555eb942eSChaitanya Kulkarni 53655eb942eSChaitanya Kulkarni mutex_lock(&ns->subsys->lock); 53755eb942eSChaitanya Kulkarni if (ns->enabled) { 53855eb942eSChaitanya Kulkarni pr_err("disable ns before setting buffered_io value.\n"); 53955eb942eSChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 54055eb942eSChaitanya Kulkarni return -EINVAL; 54155eb942eSChaitanya Kulkarni } 54255eb942eSChaitanya Kulkarni 54355eb942eSChaitanya Kulkarni ns->buffered_io = val; 54455eb942eSChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 54555eb942eSChaitanya Kulkarni return count; 54655eb942eSChaitanya Kulkarni } 54755eb942eSChaitanya Kulkarni 54855eb942eSChaitanya Kulkarni CONFIGFS_ATTR(nvmet_ns_, buffered_io); 54955eb942eSChaitanya Kulkarni 550a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_ns_attrs[] = { 551a07b4970SChristoph Hellwig &nvmet_ns_attr_device_path, 552a07b4970SChristoph Hellwig &nvmet_ns_attr_device_nguid, 553430c7befSJohannes Thumshirn &nvmet_ns_attr_device_uuid, 55462ac0d32SChristoph Hellwig &nvmet_ns_attr_ana_grpid, 555a07b4970SChristoph Hellwig &nvmet_ns_attr_enable, 55655eb942eSChaitanya Kulkarni &nvmet_ns_attr_buffered_io, 557c6925093SLogan Gunthorpe #ifdef CONFIG_PCI_P2PDMA 558c6925093SLogan Gunthorpe &nvmet_ns_attr_p2pmem, 559c6925093SLogan Gunthorpe #endif 560a07b4970SChristoph Hellwig NULL, 561a07b4970SChristoph Hellwig }; 562a07b4970SChristoph Hellwig 563a07b4970SChristoph Hellwig static void nvmet_ns_release(struct config_item *item) 564a07b4970SChristoph Hellwig { 565a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 566a07b4970SChristoph Hellwig 567a07b4970SChristoph Hellwig nvmet_ns_free(ns); 568a07b4970SChristoph Hellwig } 569a07b4970SChristoph Hellwig 570a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_ns_item_ops = { 571a07b4970SChristoph Hellwig .release = nvmet_ns_release, 572a07b4970SChristoph Hellwig }; 573a07b4970SChristoph Hellwig 57466603a31SBhumika Goyal static const struct config_item_type nvmet_ns_type = { 575a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_ns_item_ops, 576a07b4970SChristoph Hellwig .ct_attrs = nvmet_ns_attrs, 577a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 578a07b4970SChristoph Hellwig }; 579a07b4970SChristoph Hellwig 580a07b4970SChristoph Hellwig static struct config_group *nvmet_ns_make(struct config_group *group, 581a07b4970SChristoph Hellwig const char *name) 582a07b4970SChristoph Hellwig { 583a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = namespaces_to_subsys(&group->cg_item); 584a07b4970SChristoph Hellwig struct nvmet_ns *ns; 585a07b4970SChristoph Hellwig int ret; 586a07b4970SChristoph Hellwig u32 nsid; 587a07b4970SChristoph Hellwig 588a07b4970SChristoph Hellwig ret = kstrtou32(name, 0, &nsid); 589a07b4970SChristoph Hellwig if (ret) 590a07b4970SChristoph Hellwig goto out; 591a07b4970SChristoph Hellwig 592a07b4970SChristoph Hellwig ret = -EINVAL; 5935ba89503SMikhail Skorzhinskii if (nsid == 0 || nsid == NVME_NSID_ALL) { 5945ba89503SMikhail Skorzhinskii pr_err("invalid nsid %#x", nsid); 595a07b4970SChristoph Hellwig goto out; 5965ba89503SMikhail Skorzhinskii } 597a07b4970SChristoph Hellwig 598a07b4970SChristoph Hellwig ret = -ENOMEM; 599a07b4970SChristoph Hellwig ns = nvmet_ns_alloc(subsys, nsid); 600a07b4970SChristoph Hellwig if (!ns) 601a07b4970SChristoph Hellwig goto out; 602a07b4970SChristoph Hellwig config_group_init_type_name(&ns->group, name, &nvmet_ns_type); 603a07b4970SChristoph Hellwig 604a07b4970SChristoph Hellwig pr_info("adding nsid %d to subsystem %s\n", nsid, subsys->subsysnqn); 605a07b4970SChristoph Hellwig 606a07b4970SChristoph Hellwig return &ns->group; 607a07b4970SChristoph Hellwig out: 608a07b4970SChristoph Hellwig return ERR_PTR(ret); 609a07b4970SChristoph Hellwig } 610a07b4970SChristoph Hellwig 611a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_namespaces_group_ops = { 612a07b4970SChristoph Hellwig .make_group = nvmet_ns_make, 613a07b4970SChristoph Hellwig }; 614a07b4970SChristoph Hellwig 61566603a31SBhumika Goyal static const struct config_item_type nvmet_namespaces_type = { 616a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_namespaces_group_ops, 617a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 618a07b4970SChristoph Hellwig }; 619a07b4970SChristoph Hellwig 620a07b4970SChristoph Hellwig static int nvmet_port_subsys_allow_link(struct config_item *parent, 621a07b4970SChristoph Hellwig struct config_item *target) 622a07b4970SChristoph Hellwig { 623a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(parent->ci_parent); 624a07b4970SChristoph Hellwig struct nvmet_subsys *subsys; 625a07b4970SChristoph Hellwig struct nvmet_subsys_link *link, *p; 626a07b4970SChristoph Hellwig int ret; 627a07b4970SChristoph Hellwig 628a07b4970SChristoph Hellwig if (target->ci_type != &nvmet_subsys_type) { 629a07b4970SChristoph Hellwig pr_err("can only link subsystems into the subsystems dir.!\n"); 630a07b4970SChristoph Hellwig return -EINVAL; 631a07b4970SChristoph Hellwig } 632a07b4970SChristoph Hellwig subsys = to_subsys(target); 633a07b4970SChristoph Hellwig link = kmalloc(sizeof(*link), GFP_KERNEL); 634a07b4970SChristoph Hellwig if (!link) 635a07b4970SChristoph Hellwig return -ENOMEM; 636a07b4970SChristoph Hellwig link->subsys = subsys; 637a07b4970SChristoph Hellwig 638a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 639a07b4970SChristoph Hellwig ret = -EEXIST; 640a07b4970SChristoph Hellwig list_for_each_entry(p, &port->subsystems, entry) { 641a07b4970SChristoph Hellwig if (p->subsys == subsys) 642a07b4970SChristoph Hellwig goto out_free_link; 643a07b4970SChristoph Hellwig } 644a07b4970SChristoph Hellwig 645a07b4970SChristoph Hellwig if (list_empty(&port->subsystems)) { 646a07b4970SChristoph Hellwig ret = nvmet_enable_port(port); 647a07b4970SChristoph Hellwig if (ret) 648a07b4970SChristoph Hellwig goto out_free_link; 649a07b4970SChristoph Hellwig } 650a07b4970SChristoph Hellwig 651a07b4970SChristoph Hellwig list_add_tail(&link->entry, &port->subsystems); 652b662a078SJay Sternberg nvmet_port_disc_changed(port, subsys); 653b662a078SJay Sternberg 654a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 655a07b4970SChristoph Hellwig return 0; 656a07b4970SChristoph Hellwig 657a07b4970SChristoph Hellwig out_free_link: 658a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 659a07b4970SChristoph Hellwig kfree(link); 660a07b4970SChristoph Hellwig return ret; 661a07b4970SChristoph Hellwig } 662a07b4970SChristoph Hellwig 663e16769d4SAndrzej Pietrasiewicz static void nvmet_port_subsys_drop_link(struct config_item *parent, 664a07b4970SChristoph Hellwig struct config_item *target) 665a07b4970SChristoph Hellwig { 666a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(parent->ci_parent); 667a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(target); 668a07b4970SChristoph Hellwig struct nvmet_subsys_link *p; 669a07b4970SChristoph Hellwig 670a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 671a07b4970SChristoph Hellwig list_for_each_entry(p, &port->subsystems, entry) { 672a07b4970SChristoph Hellwig if (p->subsys == subsys) 673a07b4970SChristoph Hellwig goto found; 674a07b4970SChristoph Hellwig } 675a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 676e16769d4SAndrzej Pietrasiewicz return; 677a07b4970SChristoph Hellwig 678a07b4970SChristoph Hellwig found: 679a07b4970SChristoph Hellwig list_del(&p->entry); 6803aed8673SLogan Gunthorpe nvmet_port_del_ctrls(port, subsys); 681b662a078SJay Sternberg nvmet_port_disc_changed(port, subsys); 682b662a078SJay Sternberg 683a07b4970SChristoph Hellwig if (list_empty(&port->subsystems)) 684a07b4970SChristoph Hellwig nvmet_disable_port(port); 685a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 686a07b4970SChristoph Hellwig kfree(p); 687a07b4970SChristoph Hellwig } 688a07b4970SChristoph Hellwig 689a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_port_subsys_item_ops = { 690a07b4970SChristoph Hellwig .allow_link = nvmet_port_subsys_allow_link, 691a07b4970SChristoph Hellwig .drop_link = nvmet_port_subsys_drop_link, 692a07b4970SChristoph Hellwig }; 693a07b4970SChristoph Hellwig 69466603a31SBhumika Goyal static const struct config_item_type nvmet_port_subsys_type = { 695a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_port_subsys_item_ops, 696a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 697a07b4970SChristoph Hellwig }; 698a07b4970SChristoph Hellwig 699a07b4970SChristoph Hellwig static int nvmet_allowed_hosts_allow_link(struct config_item *parent, 700a07b4970SChristoph Hellwig struct config_item *target) 701a07b4970SChristoph Hellwig { 702a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); 703a07b4970SChristoph Hellwig struct nvmet_host *host; 704a07b4970SChristoph Hellwig struct nvmet_host_link *link, *p; 705a07b4970SChristoph Hellwig int ret; 706a07b4970SChristoph Hellwig 707a07b4970SChristoph Hellwig if (target->ci_type != &nvmet_host_type) { 708a07b4970SChristoph Hellwig pr_err("can only link hosts into the allowed_hosts directory!\n"); 709a07b4970SChristoph Hellwig return -EINVAL; 710a07b4970SChristoph Hellwig } 711a07b4970SChristoph Hellwig 712a07b4970SChristoph Hellwig host = to_host(target); 713a07b4970SChristoph Hellwig link = kmalloc(sizeof(*link), GFP_KERNEL); 714a07b4970SChristoph Hellwig if (!link) 715a07b4970SChristoph Hellwig return -ENOMEM; 716a07b4970SChristoph Hellwig link->host = host; 717a07b4970SChristoph Hellwig 718a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 719a07b4970SChristoph Hellwig ret = -EINVAL; 720a07b4970SChristoph Hellwig if (subsys->allow_any_host) { 721a07b4970SChristoph Hellwig pr_err("can't add hosts when allow_any_host is set!\n"); 722a07b4970SChristoph Hellwig goto out_free_link; 723a07b4970SChristoph Hellwig } 724a07b4970SChristoph Hellwig 725a07b4970SChristoph Hellwig ret = -EEXIST; 726a07b4970SChristoph Hellwig list_for_each_entry(p, &subsys->hosts, entry) { 727a07b4970SChristoph Hellwig if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) 728a07b4970SChristoph Hellwig goto out_free_link; 729a07b4970SChristoph Hellwig } 730a07b4970SChristoph Hellwig list_add_tail(&link->entry, &subsys->hosts); 731b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, host); 732b662a078SJay Sternberg 733a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 734a07b4970SChristoph Hellwig return 0; 735a07b4970SChristoph Hellwig out_free_link: 736a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 737a07b4970SChristoph Hellwig kfree(link); 738a07b4970SChristoph Hellwig return ret; 739a07b4970SChristoph Hellwig } 740a07b4970SChristoph Hellwig 741e16769d4SAndrzej Pietrasiewicz static void nvmet_allowed_hosts_drop_link(struct config_item *parent, 742a07b4970SChristoph Hellwig struct config_item *target) 743a07b4970SChristoph Hellwig { 744a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); 745a07b4970SChristoph Hellwig struct nvmet_host *host = to_host(target); 746a07b4970SChristoph Hellwig struct nvmet_host_link *p; 747a07b4970SChristoph Hellwig 748a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 749a07b4970SChristoph Hellwig list_for_each_entry(p, &subsys->hosts, entry) { 750a07b4970SChristoph Hellwig if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) 751a07b4970SChristoph Hellwig goto found; 752a07b4970SChristoph Hellwig } 753a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 754e16769d4SAndrzej Pietrasiewicz return; 755a07b4970SChristoph Hellwig 756a07b4970SChristoph Hellwig found: 757a07b4970SChristoph Hellwig list_del(&p->entry); 758b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, host); 759b662a078SJay Sternberg 760a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 761a07b4970SChristoph Hellwig kfree(p); 762a07b4970SChristoph Hellwig } 763a07b4970SChristoph Hellwig 764a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_allowed_hosts_item_ops = { 765a07b4970SChristoph Hellwig .allow_link = nvmet_allowed_hosts_allow_link, 766a07b4970SChristoph Hellwig .drop_link = nvmet_allowed_hosts_drop_link, 767a07b4970SChristoph Hellwig }; 768a07b4970SChristoph Hellwig 76966603a31SBhumika Goyal static const struct config_item_type nvmet_allowed_hosts_type = { 770a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_allowed_hosts_item_ops, 771a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 772a07b4970SChristoph Hellwig }; 773a07b4970SChristoph Hellwig 774a07b4970SChristoph Hellwig static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item, 775a07b4970SChristoph Hellwig char *page) 776a07b4970SChristoph Hellwig { 777a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", 778a07b4970SChristoph Hellwig to_subsys(item)->allow_any_host); 779a07b4970SChristoph Hellwig } 780a07b4970SChristoph Hellwig 781a07b4970SChristoph Hellwig static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, 782a07b4970SChristoph Hellwig const char *page, size_t count) 783a07b4970SChristoph Hellwig { 784a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(item); 785a07b4970SChristoph Hellwig bool allow_any_host; 786a07b4970SChristoph Hellwig int ret = 0; 787a07b4970SChristoph Hellwig 788a07b4970SChristoph Hellwig if (strtobool(page, &allow_any_host)) 789a07b4970SChristoph Hellwig return -EINVAL; 790a07b4970SChristoph Hellwig 791a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 792a07b4970SChristoph Hellwig if (allow_any_host && !list_empty(&subsys->hosts)) { 793a07b4970SChristoph Hellwig pr_err("Can't set allow_any_host when explicit hosts are set!\n"); 794a07b4970SChristoph Hellwig ret = -EINVAL; 795a07b4970SChristoph Hellwig goto out_unlock; 796a07b4970SChristoph Hellwig } 797a07b4970SChristoph Hellwig 798b662a078SJay Sternberg if (subsys->allow_any_host != allow_any_host) { 799a07b4970SChristoph Hellwig subsys->allow_any_host = allow_any_host; 800b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, NULL); 801b662a078SJay Sternberg } 802b662a078SJay Sternberg 803a07b4970SChristoph Hellwig out_unlock: 804a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 805a07b4970SChristoph Hellwig return ret ? ret : count; 806a07b4970SChristoph Hellwig } 807a07b4970SChristoph Hellwig 808a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); 809a07b4970SChristoph Hellwig 81041528f80SJohannes Thumshirn static ssize_t nvmet_subsys_attr_version_show(struct config_item *item, 811c61d788bSJohannes Thumshirn char *page) 812c61d788bSJohannes Thumshirn { 813c61d788bSJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 814c61d788bSJohannes Thumshirn 815c61d788bSJohannes Thumshirn if (NVME_TERTIARY(subsys->ver)) 816c61d788bSJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%d.%d.%d\n", 817c61d788bSJohannes Thumshirn (int)NVME_MAJOR(subsys->ver), 818c61d788bSJohannes Thumshirn (int)NVME_MINOR(subsys->ver), 819c61d788bSJohannes Thumshirn (int)NVME_TERTIARY(subsys->ver)); 820527123c7SChaitanya Kulkarni 821c61d788bSJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%d.%d\n", 822c61d788bSJohannes Thumshirn (int)NVME_MAJOR(subsys->ver), 823c61d788bSJohannes Thumshirn (int)NVME_MINOR(subsys->ver)); 824c61d788bSJohannes Thumshirn } 825c61d788bSJohannes Thumshirn 82641528f80SJohannes Thumshirn static ssize_t nvmet_subsys_attr_version_store(struct config_item *item, 827c61d788bSJohannes Thumshirn const char *page, size_t count) 828c61d788bSJohannes Thumshirn { 829c61d788bSJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 830c61d788bSJohannes Thumshirn int major, minor, tertiary = 0; 831c61d788bSJohannes Thumshirn int ret; 832c61d788bSJohannes Thumshirn 833c61d788bSJohannes Thumshirn ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary); 834c61d788bSJohannes Thumshirn if (ret != 2 && ret != 3) 835c61d788bSJohannes Thumshirn return -EINVAL; 836c61d788bSJohannes Thumshirn 837c61d788bSJohannes Thumshirn down_write(&nvmet_config_sem); 838c61d788bSJohannes Thumshirn subsys->ver = NVME_VS(major, minor, tertiary); 839c61d788bSJohannes Thumshirn up_write(&nvmet_config_sem); 840c61d788bSJohannes Thumshirn 841c61d788bSJohannes Thumshirn return count; 842c61d788bSJohannes Thumshirn } 84341528f80SJohannes Thumshirn CONFIGFS_ATTR(nvmet_subsys_, attr_version); 844c61d788bSJohannes Thumshirn 845fcbc5459SJohannes Thumshirn static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item, 846fcbc5459SJohannes Thumshirn char *page) 847fcbc5459SJohannes Thumshirn { 848fcbc5459SJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 849fcbc5459SJohannes Thumshirn 850fcbc5459SJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%llx\n", subsys->serial); 851fcbc5459SJohannes Thumshirn } 852fcbc5459SJohannes Thumshirn 853fcbc5459SJohannes Thumshirn static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item, 854fcbc5459SJohannes Thumshirn const char *page, size_t count) 855fcbc5459SJohannes Thumshirn { 856d3a9b0caSChaitanya Kulkarni u64 serial; 857d3a9b0caSChaitanya Kulkarni 858d3a9b0caSChaitanya Kulkarni if (sscanf(page, "%llx\n", &serial) != 1) 859d3a9b0caSChaitanya Kulkarni return -EINVAL; 860fcbc5459SJohannes Thumshirn 861fcbc5459SJohannes Thumshirn down_write(&nvmet_config_sem); 862d3a9b0caSChaitanya Kulkarni to_subsys(item)->serial = serial; 863fcbc5459SJohannes Thumshirn up_write(&nvmet_config_sem); 864fcbc5459SJohannes Thumshirn 865fcbc5459SJohannes Thumshirn return count; 866fcbc5459SJohannes Thumshirn } 867fcbc5459SJohannes Thumshirn CONFIGFS_ATTR(nvmet_subsys_, attr_serial); 868fcbc5459SJohannes Thumshirn 86994a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item, 87094a39d61SChaitanya Kulkarni char *page) 87194a39d61SChaitanya Kulkarni { 87294a39d61SChaitanya Kulkarni return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_min); 87394a39d61SChaitanya Kulkarni } 87494a39d61SChaitanya Kulkarni 87594a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item, 87694a39d61SChaitanya Kulkarni const char *page, size_t cnt) 87794a39d61SChaitanya Kulkarni { 87894a39d61SChaitanya Kulkarni u16 cntlid_min; 87994a39d61SChaitanya Kulkarni 88094a39d61SChaitanya Kulkarni if (sscanf(page, "%hu\n", &cntlid_min) != 1) 88194a39d61SChaitanya Kulkarni return -EINVAL; 88294a39d61SChaitanya Kulkarni 88394a39d61SChaitanya Kulkarni if (cntlid_min == 0) 88494a39d61SChaitanya Kulkarni return -EINVAL; 88594a39d61SChaitanya Kulkarni 88694a39d61SChaitanya Kulkarni down_write(&nvmet_config_sem); 88794a39d61SChaitanya Kulkarni if (cntlid_min >= to_subsys(item)->cntlid_max) 88894a39d61SChaitanya Kulkarni goto out_unlock; 88994a39d61SChaitanya Kulkarni to_subsys(item)->cntlid_min = cntlid_min; 89094a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 89194a39d61SChaitanya Kulkarni return cnt; 89294a39d61SChaitanya Kulkarni 89394a39d61SChaitanya Kulkarni out_unlock: 89494a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 89594a39d61SChaitanya Kulkarni return -EINVAL; 89694a39d61SChaitanya Kulkarni } 89794a39d61SChaitanya Kulkarni CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min); 89894a39d61SChaitanya Kulkarni 89994a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item, 90094a39d61SChaitanya Kulkarni char *page) 90194a39d61SChaitanya Kulkarni { 90294a39d61SChaitanya Kulkarni return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_max); 90394a39d61SChaitanya Kulkarni } 90494a39d61SChaitanya Kulkarni 90594a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item, 90694a39d61SChaitanya Kulkarni const char *page, size_t cnt) 90794a39d61SChaitanya Kulkarni { 90894a39d61SChaitanya Kulkarni u16 cntlid_max; 90994a39d61SChaitanya Kulkarni 91094a39d61SChaitanya Kulkarni if (sscanf(page, "%hu\n", &cntlid_max) != 1) 91194a39d61SChaitanya Kulkarni return -EINVAL; 91294a39d61SChaitanya Kulkarni 91394a39d61SChaitanya Kulkarni if (cntlid_max == 0) 91494a39d61SChaitanya Kulkarni return -EINVAL; 91594a39d61SChaitanya Kulkarni 91694a39d61SChaitanya Kulkarni down_write(&nvmet_config_sem); 91794a39d61SChaitanya Kulkarni if (cntlid_max <= to_subsys(item)->cntlid_min) 91894a39d61SChaitanya Kulkarni goto out_unlock; 91994a39d61SChaitanya Kulkarni to_subsys(item)->cntlid_max = cntlid_max; 92094a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 92194a39d61SChaitanya Kulkarni return cnt; 92294a39d61SChaitanya Kulkarni 92394a39d61SChaitanya Kulkarni out_unlock: 92494a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 92594a39d61SChaitanya Kulkarni return -EINVAL; 92694a39d61SChaitanya Kulkarni } 92794a39d61SChaitanya Kulkarni CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max); 92894a39d61SChaitanya Kulkarni 929013b7ebeSMark Ruijter static ssize_t nvmet_subsys_attr_model_show(struct config_item *item, 930013b7ebeSMark Ruijter char *page) 931013b7ebeSMark Ruijter { 932013b7ebeSMark Ruijter struct nvmet_subsys *subsys = to_subsys(item); 933013b7ebeSMark Ruijter struct nvmet_subsys_model *subsys_model; 934013b7ebeSMark Ruijter char *model = NVMET_DEFAULT_CTRL_MODEL; 935013b7ebeSMark Ruijter int ret; 936013b7ebeSMark Ruijter 937013b7ebeSMark Ruijter rcu_read_lock(); 938013b7ebeSMark Ruijter subsys_model = rcu_dereference(subsys->model); 939013b7ebeSMark Ruijter if (subsys_model) 940013b7ebeSMark Ruijter model = subsys_model->number; 941013b7ebeSMark Ruijter ret = snprintf(page, PAGE_SIZE, "%s\n", model); 942013b7ebeSMark Ruijter rcu_read_unlock(); 943013b7ebeSMark Ruijter 944013b7ebeSMark Ruijter return ret; 945013b7ebeSMark Ruijter } 946013b7ebeSMark Ruijter 947013b7ebeSMark Ruijter /* See Section 1.5 of NVMe 1.4 */ 948013b7ebeSMark Ruijter static bool nvmet_is_ascii(const char c) 949013b7ebeSMark Ruijter { 950013b7ebeSMark Ruijter return c >= 0x20 && c <= 0x7e; 951013b7ebeSMark Ruijter } 952013b7ebeSMark Ruijter 953013b7ebeSMark Ruijter static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, 954013b7ebeSMark Ruijter const char *page, size_t count) 955013b7ebeSMark Ruijter { 956013b7ebeSMark Ruijter struct nvmet_subsys *subsys = to_subsys(item); 957013b7ebeSMark Ruijter struct nvmet_subsys_model *new_model; 958013b7ebeSMark Ruijter char *new_model_number; 959013b7ebeSMark Ruijter int pos = 0, len; 960013b7ebeSMark Ruijter 961013b7ebeSMark Ruijter len = strcspn(page, "\n"); 962013b7ebeSMark Ruijter if (!len) 963013b7ebeSMark Ruijter return -EINVAL; 964013b7ebeSMark Ruijter 965013b7ebeSMark Ruijter for (pos = 0; pos < len; pos++) { 966013b7ebeSMark Ruijter if (!nvmet_is_ascii(page[pos])) 967013b7ebeSMark Ruijter return -EINVAL; 968013b7ebeSMark Ruijter } 969013b7ebeSMark Ruijter 970013b7ebeSMark Ruijter new_model_number = kstrndup(page, len, GFP_KERNEL); 971013b7ebeSMark Ruijter if (!new_model_number) 972013b7ebeSMark Ruijter return -ENOMEM; 973013b7ebeSMark Ruijter 974013b7ebeSMark Ruijter new_model = kzalloc(sizeof(*new_model) + len + 1, GFP_KERNEL); 975013b7ebeSMark Ruijter if (!new_model) { 976013b7ebeSMark Ruijter kfree(new_model_number); 977013b7ebeSMark Ruijter return -ENOMEM; 978013b7ebeSMark Ruijter } 979013b7ebeSMark Ruijter memcpy(new_model->number, new_model_number, len); 980013b7ebeSMark Ruijter 981013b7ebeSMark Ruijter down_write(&nvmet_config_sem); 982013b7ebeSMark Ruijter mutex_lock(&subsys->lock); 983013b7ebeSMark Ruijter new_model = rcu_replace_pointer(subsys->model, new_model, 984013b7ebeSMark Ruijter mutex_is_locked(&subsys->lock)); 985013b7ebeSMark Ruijter mutex_unlock(&subsys->lock); 986013b7ebeSMark Ruijter up_write(&nvmet_config_sem); 987013b7ebeSMark Ruijter 988013b7ebeSMark Ruijter kfree_rcu(new_model, rcuhead); 989013b7ebeSMark Ruijter 990013b7ebeSMark Ruijter return count; 991013b7ebeSMark Ruijter } 992013b7ebeSMark Ruijter CONFIGFS_ATTR(nvmet_subsys_, attr_model); 993013b7ebeSMark Ruijter 994a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_subsys_attrs[] = { 995a07b4970SChristoph Hellwig &nvmet_subsys_attr_attr_allow_any_host, 99641528f80SJohannes Thumshirn &nvmet_subsys_attr_attr_version, 997fcbc5459SJohannes Thumshirn &nvmet_subsys_attr_attr_serial, 99894a39d61SChaitanya Kulkarni &nvmet_subsys_attr_attr_cntlid_min, 99994a39d61SChaitanya Kulkarni &nvmet_subsys_attr_attr_cntlid_max, 1000013b7ebeSMark Ruijter &nvmet_subsys_attr_attr_model, 1001a07b4970SChristoph Hellwig NULL, 1002a07b4970SChristoph Hellwig }; 1003a07b4970SChristoph Hellwig 1004a07b4970SChristoph Hellwig /* 1005a07b4970SChristoph Hellwig * Subsystem structures & folder operation functions below 1006a07b4970SChristoph Hellwig */ 1007a07b4970SChristoph Hellwig static void nvmet_subsys_release(struct config_item *item) 1008a07b4970SChristoph Hellwig { 1009a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(item); 1010a07b4970SChristoph Hellwig 1011344770b0SSagi Grimberg nvmet_subsys_del_ctrls(subsys); 1012a07b4970SChristoph Hellwig nvmet_subsys_put(subsys); 1013a07b4970SChristoph Hellwig } 1014a07b4970SChristoph Hellwig 1015a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_subsys_item_ops = { 1016a07b4970SChristoph Hellwig .release = nvmet_subsys_release, 1017a07b4970SChristoph Hellwig }; 1018a07b4970SChristoph Hellwig 101966603a31SBhumika Goyal static const struct config_item_type nvmet_subsys_type = { 1020a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_subsys_item_ops, 1021a07b4970SChristoph Hellwig .ct_attrs = nvmet_subsys_attrs, 1022a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1023a07b4970SChristoph Hellwig }; 1024a07b4970SChristoph Hellwig 1025a07b4970SChristoph Hellwig static struct config_group *nvmet_subsys_make(struct config_group *group, 1026a07b4970SChristoph Hellwig const char *name) 1027a07b4970SChristoph Hellwig { 1028a07b4970SChristoph Hellwig struct nvmet_subsys *subsys; 1029a07b4970SChristoph Hellwig 1030a07b4970SChristoph Hellwig if (sysfs_streq(name, NVME_DISC_SUBSYS_NAME)) { 1031a07b4970SChristoph Hellwig pr_err("can't create discovery subsystem through configfs\n"); 1032a07b4970SChristoph Hellwig return ERR_PTR(-EINVAL); 1033a07b4970SChristoph Hellwig } 1034a07b4970SChristoph Hellwig 1035a07b4970SChristoph Hellwig subsys = nvmet_subsys_alloc(name, NVME_NQN_NVME); 10366b7e631bSMinwoo Im if (IS_ERR(subsys)) 10376b7e631bSMinwoo Im return ERR_CAST(subsys); 1038a07b4970SChristoph Hellwig 1039a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->group, name, &nvmet_subsys_type); 1040a07b4970SChristoph Hellwig 1041a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->namespaces_group, 1042a07b4970SChristoph Hellwig "namespaces", &nvmet_namespaces_type); 1043a07b4970SChristoph Hellwig configfs_add_default_group(&subsys->namespaces_group, &subsys->group); 1044a07b4970SChristoph Hellwig 1045a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->allowed_hosts_group, 1046a07b4970SChristoph Hellwig "allowed_hosts", &nvmet_allowed_hosts_type); 1047a07b4970SChristoph Hellwig configfs_add_default_group(&subsys->allowed_hosts_group, 1048a07b4970SChristoph Hellwig &subsys->group); 1049a07b4970SChristoph Hellwig 1050a07b4970SChristoph Hellwig return &subsys->group; 1051a07b4970SChristoph Hellwig } 1052a07b4970SChristoph Hellwig 1053a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_subsystems_group_ops = { 1054a07b4970SChristoph Hellwig .make_group = nvmet_subsys_make, 1055a07b4970SChristoph Hellwig }; 1056a07b4970SChristoph Hellwig 105766603a31SBhumika Goyal static const struct config_item_type nvmet_subsystems_type = { 1058a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_subsystems_group_ops, 1059a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1060a07b4970SChristoph Hellwig }; 1061a07b4970SChristoph Hellwig 1062a07b4970SChristoph Hellwig static ssize_t nvmet_referral_enable_show(struct config_item *item, 1063a07b4970SChristoph Hellwig char *page) 1064a07b4970SChristoph Hellwig { 1065a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", to_nvmet_port(item)->enabled); 1066a07b4970SChristoph Hellwig } 1067a07b4970SChristoph Hellwig 1068a07b4970SChristoph Hellwig static ssize_t nvmet_referral_enable_store(struct config_item *item, 1069a07b4970SChristoph Hellwig const char *page, size_t count) 1070a07b4970SChristoph Hellwig { 1071a07b4970SChristoph Hellwig struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); 1072a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1073a07b4970SChristoph Hellwig bool enable; 1074a07b4970SChristoph Hellwig 1075a07b4970SChristoph Hellwig if (strtobool(page, &enable)) 1076a07b4970SChristoph Hellwig goto inval; 1077a07b4970SChristoph Hellwig 1078a07b4970SChristoph Hellwig if (enable) 1079a07b4970SChristoph Hellwig nvmet_referral_enable(parent, port); 1080a07b4970SChristoph Hellwig else 1081b662a078SJay Sternberg nvmet_referral_disable(parent, port); 1082a07b4970SChristoph Hellwig 1083a07b4970SChristoph Hellwig return count; 1084a07b4970SChristoph Hellwig inval: 1085a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for enable\n", page); 1086a07b4970SChristoph Hellwig return -EINVAL; 1087a07b4970SChristoph Hellwig } 1088a07b4970SChristoph Hellwig 1089a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_referral_, enable); 1090a07b4970SChristoph Hellwig 1091a07b4970SChristoph Hellwig /* 1092a07b4970SChristoph Hellwig * Discovery Service subsystem definitions 1093a07b4970SChristoph Hellwig */ 1094a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_referral_attrs[] = { 1095a07b4970SChristoph Hellwig &nvmet_attr_addr_adrfam, 1096a07b4970SChristoph Hellwig &nvmet_attr_addr_portid, 1097a07b4970SChristoph Hellwig &nvmet_attr_addr_treq, 1098a07b4970SChristoph Hellwig &nvmet_attr_addr_traddr, 1099a07b4970SChristoph Hellwig &nvmet_attr_addr_trsvcid, 1100a07b4970SChristoph Hellwig &nvmet_attr_addr_trtype, 1101a07b4970SChristoph Hellwig &nvmet_referral_attr_enable, 1102a07b4970SChristoph Hellwig NULL, 1103a07b4970SChristoph Hellwig }; 1104a07b4970SChristoph Hellwig 1105f0e656e4SSagi Grimberg static void nvmet_referral_notify(struct config_group *group, 1106f0e656e4SSagi Grimberg struct config_item *item) 1107a07b4970SChristoph Hellwig { 1108b662a078SJay Sternberg struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); 1109a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1110a07b4970SChristoph Hellwig 1111b662a078SJay Sternberg nvmet_referral_disable(parent, port); 1112f0e656e4SSagi Grimberg } 1113f0e656e4SSagi Grimberg 1114f0e656e4SSagi Grimberg static void nvmet_referral_release(struct config_item *item) 1115f0e656e4SSagi Grimberg { 1116f0e656e4SSagi Grimberg struct nvmet_port *port = to_nvmet_port(item); 1117f0e656e4SSagi Grimberg 1118a07b4970SChristoph Hellwig kfree(port); 1119a07b4970SChristoph Hellwig } 1120a07b4970SChristoph Hellwig 1121a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_referral_item_ops = { 1122a07b4970SChristoph Hellwig .release = nvmet_referral_release, 1123a07b4970SChristoph Hellwig }; 1124a07b4970SChristoph Hellwig 112566603a31SBhumika Goyal static const struct config_item_type nvmet_referral_type = { 1126a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1127a07b4970SChristoph Hellwig .ct_attrs = nvmet_referral_attrs, 1128a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_referral_item_ops, 1129a07b4970SChristoph Hellwig }; 1130a07b4970SChristoph Hellwig 1131a07b4970SChristoph Hellwig static struct config_group *nvmet_referral_make( 1132a07b4970SChristoph Hellwig struct config_group *group, const char *name) 1133a07b4970SChristoph Hellwig { 1134a07b4970SChristoph Hellwig struct nvmet_port *port; 1135a07b4970SChristoph Hellwig 1136a07b4970SChristoph Hellwig port = kzalloc(sizeof(*port), GFP_KERNEL); 1137a07b4970SChristoph Hellwig if (!port) 1138f98d9ca1SDan Carpenter return ERR_PTR(-ENOMEM); 1139a07b4970SChristoph Hellwig 1140a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->entry); 1141a07b4970SChristoph Hellwig config_group_init_type_name(&port->group, name, &nvmet_referral_type); 1142a07b4970SChristoph Hellwig 1143a07b4970SChristoph Hellwig return &port->group; 1144a07b4970SChristoph Hellwig } 1145a07b4970SChristoph Hellwig 1146a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_referral_group_ops = { 1147a07b4970SChristoph Hellwig .make_group = nvmet_referral_make, 1148f0e656e4SSagi Grimberg .disconnect_notify = nvmet_referral_notify, 1149a07b4970SChristoph Hellwig }; 1150a07b4970SChristoph Hellwig 115166603a31SBhumika Goyal static const struct config_item_type nvmet_referrals_type = { 1152a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1153a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_referral_group_ops, 1154a07b4970SChristoph Hellwig }; 1155a07b4970SChristoph Hellwig 115662ac0d32SChristoph Hellwig static struct { 115762ac0d32SChristoph Hellwig enum nvme_ana_state state; 115862ac0d32SChristoph Hellwig const char *name; 115962ac0d32SChristoph Hellwig } nvmet_ana_state_names[] = { 116062ac0d32SChristoph Hellwig { NVME_ANA_OPTIMIZED, "optimized" }, 116162ac0d32SChristoph Hellwig { NVME_ANA_NONOPTIMIZED, "non-optimized" }, 116262ac0d32SChristoph Hellwig { NVME_ANA_INACCESSIBLE, "inaccessible" }, 116362ac0d32SChristoph Hellwig { NVME_ANA_PERSISTENT_LOSS, "persistent-loss" }, 116462ac0d32SChristoph Hellwig { NVME_ANA_CHANGE, "change" }, 116562ac0d32SChristoph Hellwig }; 116662ac0d32SChristoph Hellwig 116762ac0d32SChristoph Hellwig static ssize_t nvmet_ana_group_ana_state_show(struct config_item *item, 116862ac0d32SChristoph Hellwig char *page) 116962ac0d32SChristoph Hellwig { 117062ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 117162ac0d32SChristoph Hellwig enum nvme_ana_state state = grp->port->ana_state[grp->grpid]; 117262ac0d32SChristoph Hellwig int i; 117362ac0d32SChristoph Hellwig 117462ac0d32SChristoph Hellwig for (i = 0; i < ARRAY_SIZE(nvmet_ana_state_names); i++) { 117562ac0d32SChristoph Hellwig if (state != nvmet_ana_state_names[i].state) 117662ac0d32SChristoph Hellwig continue; 117762ac0d32SChristoph Hellwig return sprintf(page, "%s\n", nvmet_ana_state_names[i].name); 117862ac0d32SChristoph Hellwig } 117962ac0d32SChristoph Hellwig 118062ac0d32SChristoph Hellwig return sprintf(page, "\n"); 118162ac0d32SChristoph Hellwig } 118262ac0d32SChristoph Hellwig 118362ac0d32SChristoph Hellwig static ssize_t nvmet_ana_group_ana_state_store(struct config_item *item, 118462ac0d32SChristoph Hellwig const char *page, size_t count) 118562ac0d32SChristoph Hellwig { 118662ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 118762ac0d32SChristoph Hellwig int i; 118862ac0d32SChristoph Hellwig 118962ac0d32SChristoph Hellwig for (i = 0; i < ARRAY_SIZE(nvmet_ana_state_names); i++) { 119062ac0d32SChristoph Hellwig if (sysfs_streq(page, nvmet_ana_state_names[i].name)) 119162ac0d32SChristoph Hellwig goto found; 119262ac0d32SChristoph Hellwig } 119362ac0d32SChristoph Hellwig 119462ac0d32SChristoph Hellwig pr_err("Invalid value '%s' for ana_state\n", page); 119562ac0d32SChristoph Hellwig return -EINVAL; 119662ac0d32SChristoph Hellwig 119762ac0d32SChristoph Hellwig found: 119862ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 119962ac0d32SChristoph Hellwig grp->port->ana_state[grp->grpid] = nvmet_ana_state_names[i].state; 120062ac0d32SChristoph Hellwig nvmet_ana_chgcnt++; 120162ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 120262ac0d32SChristoph Hellwig 120362ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 120462ac0d32SChristoph Hellwig return count; 120562ac0d32SChristoph Hellwig } 120662ac0d32SChristoph Hellwig 120762ac0d32SChristoph Hellwig CONFIGFS_ATTR(nvmet_ana_group_, ana_state); 120862ac0d32SChristoph Hellwig 120962ac0d32SChristoph Hellwig static struct configfs_attribute *nvmet_ana_group_attrs[] = { 121062ac0d32SChristoph Hellwig &nvmet_ana_group_attr_ana_state, 121162ac0d32SChristoph Hellwig NULL, 121262ac0d32SChristoph Hellwig }; 121362ac0d32SChristoph Hellwig 121462ac0d32SChristoph Hellwig static void nvmet_ana_group_release(struct config_item *item) 121562ac0d32SChristoph Hellwig { 121662ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 121762ac0d32SChristoph Hellwig 121862ac0d32SChristoph Hellwig if (grp == &grp->port->ana_default_group) 121962ac0d32SChristoph Hellwig return; 122062ac0d32SChristoph Hellwig 122162ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 122262ac0d32SChristoph Hellwig grp->port->ana_state[grp->grpid] = NVME_ANA_INACCESSIBLE; 122362ac0d32SChristoph Hellwig nvmet_ana_group_enabled[grp->grpid]--; 122462ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 122562ac0d32SChristoph Hellwig 122662ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 122762ac0d32SChristoph Hellwig kfree(grp); 122862ac0d32SChristoph Hellwig } 122962ac0d32SChristoph Hellwig 123062ac0d32SChristoph Hellwig static struct configfs_item_operations nvmet_ana_group_item_ops = { 123162ac0d32SChristoph Hellwig .release = nvmet_ana_group_release, 123262ac0d32SChristoph Hellwig }; 123362ac0d32SChristoph Hellwig 123462ac0d32SChristoph Hellwig static const struct config_item_type nvmet_ana_group_type = { 123562ac0d32SChristoph Hellwig .ct_item_ops = &nvmet_ana_group_item_ops, 123662ac0d32SChristoph Hellwig .ct_attrs = nvmet_ana_group_attrs, 123762ac0d32SChristoph Hellwig .ct_owner = THIS_MODULE, 123862ac0d32SChristoph Hellwig }; 123962ac0d32SChristoph Hellwig 124062ac0d32SChristoph Hellwig static struct config_group *nvmet_ana_groups_make_group( 124162ac0d32SChristoph Hellwig struct config_group *group, const char *name) 124262ac0d32SChristoph Hellwig { 124362ac0d32SChristoph Hellwig struct nvmet_port *port = ana_groups_to_port(&group->cg_item); 124462ac0d32SChristoph Hellwig struct nvmet_ana_group *grp; 124562ac0d32SChristoph Hellwig u32 grpid; 124662ac0d32SChristoph Hellwig int ret; 124762ac0d32SChristoph Hellwig 124862ac0d32SChristoph Hellwig ret = kstrtou32(name, 0, &grpid); 124962ac0d32SChristoph Hellwig if (ret) 125062ac0d32SChristoph Hellwig goto out; 125162ac0d32SChristoph Hellwig 125262ac0d32SChristoph Hellwig ret = -EINVAL; 125362ac0d32SChristoph Hellwig if (grpid <= 1 || grpid > NVMET_MAX_ANAGRPS) 125462ac0d32SChristoph Hellwig goto out; 125562ac0d32SChristoph Hellwig 125662ac0d32SChristoph Hellwig ret = -ENOMEM; 125762ac0d32SChristoph Hellwig grp = kzalloc(sizeof(*grp), GFP_KERNEL); 125862ac0d32SChristoph Hellwig if (!grp) 125962ac0d32SChristoph Hellwig goto out; 126062ac0d32SChristoph Hellwig grp->port = port; 126162ac0d32SChristoph Hellwig grp->grpid = grpid; 126262ac0d32SChristoph Hellwig 126362ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 126462ac0d32SChristoph Hellwig nvmet_ana_group_enabled[grpid]++; 126562ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 126662ac0d32SChristoph Hellwig 126762ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 126862ac0d32SChristoph Hellwig 126962ac0d32SChristoph Hellwig config_group_init_type_name(&grp->group, name, &nvmet_ana_group_type); 127062ac0d32SChristoph Hellwig return &grp->group; 127162ac0d32SChristoph Hellwig out: 127262ac0d32SChristoph Hellwig return ERR_PTR(ret); 127362ac0d32SChristoph Hellwig } 127462ac0d32SChristoph Hellwig 127562ac0d32SChristoph Hellwig static struct configfs_group_operations nvmet_ana_groups_group_ops = { 127662ac0d32SChristoph Hellwig .make_group = nvmet_ana_groups_make_group, 127762ac0d32SChristoph Hellwig }; 127862ac0d32SChristoph Hellwig 127962ac0d32SChristoph Hellwig static const struct config_item_type nvmet_ana_groups_type = { 128062ac0d32SChristoph Hellwig .ct_group_ops = &nvmet_ana_groups_group_ops, 128162ac0d32SChristoph Hellwig .ct_owner = THIS_MODULE, 128262ac0d32SChristoph Hellwig }; 128362ac0d32SChristoph Hellwig 1284a07b4970SChristoph Hellwig /* 1285a07b4970SChristoph Hellwig * Ports definitions. 1286a07b4970SChristoph Hellwig */ 1287a07b4970SChristoph Hellwig static void nvmet_port_release(struct config_item *item) 1288a07b4970SChristoph Hellwig { 1289a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1290a07b4970SChristoph Hellwig 1291b662a078SJay Sternberg list_del(&port->global_entry); 1292b662a078SJay Sternberg 129372efd25dSChristoph Hellwig kfree(port->ana_state); 1294a07b4970SChristoph Hellwig kfree(port); 1295a07b4970SChristoph Hellwig } 1296a07b4970SChristoph Hellwig 1297a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_port_attrs[] = { 1298a07b4970SChristoph Hellwig &nvmet_attr_addr_adrfam, 1299a07b4970SChristoph Hellwig &nvmet_attr_addr_treq, 1300a07b4970SChristoph Hellwig &nvmet_attr_addr_traddr, 1301a07b4970SChristoph Hellwig &nvmet_attr_addr_trsvcid, 1302a07b4970SChristoph Hellwig &nvmet_attr_addr_trtype, 13030d5ee2b2SSteve Wise &nvmet_attr_param_inline_data_size, 1304a07b4970SChristoph Hellwig NULL, 1305a07b4970SChristoph Hellwig }; 1306a07b4970SChristoph Hellwig 1307a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_port_item_ops = { 1308a07b4970SChristoph Hellwig .release = nvmet_port_release, 1309a07b4970SChristoph Hellwig }; 1310a07b4970SChristoph Hellwig 131166603a31SBhumika Goyal static const struct config_item_type nvmet_port_type = { 1312a07b4970SChristoph Hellwig .ct_attrs = nvmet_port_attrs, 1313a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_port_item_ops, 1314a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1315a07b4970SChristoph Hellwig }; 1316a07b4970SChristoph Hellwig 1317a07b4970SChristoph Hellwig static struct config_group *nvmet_ports_make(struct config_group *group, 1318a07b4970SChristoph Hellwig const char *name) 1319a07b4970SChristoph Hellwig { 1320a07b4970SChristoph Hellwig struct nvmet_port *port; 1321a07b4970SChristoph Hellwig u16 portid; 132262ac0d32SChristoph Hellwig u32 i; 1323a07b4970SChristoph Hellwig 1324a07b4970SChristoph Hellwig if (kstrtou16(name, 0, &portid)) 1325a07b4970SChristoph Hellwig return ERR_PTR(-EINVAL); 1326a07b4970SChristoph Hellwig 1327a07b4970SChristoph Hellwig port = kzalloc(sizeof(*port), GFP_KERNEL); 1328a07b4970SChristoph Hellwig if (!port) 1329f98d9ca1SDan Carpenter return ERR_PTR(-ENOMEM); 1330a07b4970SChristoph Hellwig 133172efd25dSChristoph Hellwig port->ana_state = kcalloc(NVMET_MAX_ANAGRPS + 1, 133272efd25dSChristoph Hellwig sizeof(*port->ana_state), GFP_KERNEL); 133372efd25dSChristoph Hellwig if (!port->ana_state) { 133472efd25dSChristoph Hellwig kfree(port); 133572efd25dSChristoph Hellwig return ERR_PTR(-ENOMEM); 133672efd25dSChristoph Hellwig } 133772efd25dSChristoph Hellwig 133862ac0d32SChristoph Hellwig for (i = 1; i <= NVMET_MAX_ANAGRPS; i++) { 133962ac0d32SChristoph Hellwig if (i == NVMET_DEFAULT_ANA_GRPID) 134062ac0d32SChristoph Hellwig port->ana_state[1] = NVME_ANA_OPTIMIZED; 134162ac0d32SChristoph Hellwig else 134262ac0d32SChristoph Hellwig port->ana_state[i] = NVME_ANA_INACCESSIBLE; 134362ac0d32SChristoph Hellwig } 134472efd25dSChristoph Hellwig 1345b662a078SJay Sternberg list_add(&port->global_entry, &nvmet_ports_list); 1346b662a078SJay Sternberg 1347a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->entry); 1348a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->subsystems); 1349a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->referrals); 13500d5ee2b2SSteve Wise port->inline_data_size = -1; /* < 0 == let the transport choose */ 1351a07b4970SChristoph Hellwig 1352a07b4970SChristoph Hellwig port->disc_addr.portid = cpu_to_le16(portid); 13539b95d2fbSSagi Grimberg port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW; 1354a07b4970SChristoph Hellwig config_group_init_type_name(&port->group, name, &nvmet_port_type); 1355a07b4970SChristoph Hellwig 1356a07b4970SChristoph Hellwig config_group_init_type_name(&port->subsys_group, 1357a07b4970SChristoph Hellwig "subsystems", &nvmet_port_subsys_type); 1358a07b4970SChristoph Hellwig configfs_add_default_group(&port->subsys_group, &port->group); 1359a07b4970SChristoph Hellwig 1360a07b4970SChristoph Hellwig config_group_init_type_name(&port->referrals_group, 1361a07b4970SChristoph Hellwig "referrals", &nvmet_referrals_type); 1362a07b4970SChristoph Hellwig configfs_add_default_group(&port->referrals_group, &port->group); 1363a07b4970SChristoph Hellwig 136462ac0d32SChristoph Hellwig config_group_init_type_name(&port->ana_groups_group, 136562ac0d32SChristoph Hellwig "ana_groups", &nvmet_ana_groups_type); 136662ac0d32SChristoph Hellwig configfs_add_default_group(&port->ana_groups_group, &port->group); 136762ac0d32SChristoph Hellwig 136862ac0d32SChristoph Hellwig port->ana_default_group.port = port; 136962ac0d32SChristoph Hellwig port->ana_default_group.grpid = NVMET_DEFAULT_ANA_GRPID; 137062ac0d32SChristoph Hellwig config_group_init_type_name(&port->ana_default_group.group, 137162ac0d32SChristoph Hellwig __stringify(NVMET_DEFAULT_ANA_GRPID), 137262ac0d32SChristoph Hellwig &nvmet_ana_group_type); 137362ac0d32SChristoph Hellwig configfs_add_default_group(&port->ana_default_group.group, 137462ac0d32SChristoph Hellwig &port->ana_groups_group); 137562ac0d32SChristoph Hellwig 1376a07b4970SChristoph Hellwig return &port->group; 1377a07b4970SChristoph Hellwig } 1378a07b4970SChristoph Hellwig 1379a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_ports_group_ops = { 1380a07b4970SChristoph Hellwig .make_group = nvmet_ports_make, 1381a07b4970SChristoph Hellwig }; 1382a07b4970SChristoph Hellwig 138366603a31SBhumika Goyal static const struct config_item_type nvmet_ports_type = { 1384a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_ports_group_ops, 1385a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1386a07b4970SChristoph Hellwig }; 1387a07b4970SChristoph Hellwig 1388a07b4970SChristoph Hellwig static struct config_group nvmet_subsystems_group; 1389a07b4970SChristoph Hellwig static struct config_group nvmet_ports_group; 1390a07b4970SChristoph Hellwig 1391a07b4970SChristoph Hellwig static void nvmet_host_release(struct config_item *item) 1392a07b4970SChristoph Hellwig { 1393a07b4970SChristoph Hellwig struct nvmet_host *host = to_host(item); 1394a07b4970SChristoph Hellwig 1395a07b4970SChristoph Hellwig kfree(host); 1396a07b4970SChristoph Hellwig } 1397a07b4970SChristoph Hellwig 1398a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_host_item_ops = { 1399a07b4970SChristoph Hellwig .release = nvmet_host_release, 1400a07b4970SChristoph Hellwig }; 1401a07b4970SChristoph Hellwig 140266603a31SBhumika Goyal static const struct config_item_type nvmet_host_type = { 1403a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_host_item_ops, 1404a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1405a07b4970SChristoph Hellwig }; 1406a07b4970SChristoph Hellwig 1407a07b4970SChristoph Hellwig static struct config_group *nvmet_hosts_make_group(struct config_group *group, 1408a07b4970SChristoph Hellwig const char *name) 1409a07b4970SChristoph Hellwig { 1410a07b4970SChristoph Hellwig struct nvmet_host *host; 1411a07b4970SChristoph Hellwig 1412a07b4970SChristoph Hellwig host = kzalloc(sizeof(*host), GFP_KERNEL); 1413a07b4970SChristoph Hellwig if (!host) 1414a07b4970SChristoph Hellwig return ERR_PTR(-ENOMEM); 1415a07b4970SChristoph Hellwig 1416a07b4970SChristoph Hellwig config_group_init_type_name(&host->group, name, &nvmet_host_type); 1417a07b4970SChristoph Hellwig 1418a07b4970SChristoph Hellwig return &host->group; 1419a07b4970SChristoph Hellwig } 1420a07b4970SChristoph Hellwig 1421a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_hosts_group_ops = { 1422a07b4970SChristoph Hellwig .make_group = nvmet_hosts_make_group, 1423a07b4970SChristoph Hellwig }; 1424a07b4970SChristoph Hellwig 142566603a31SBhumika Goyal static const struct config_item_type nvmet_hosts_type = { 1426a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_hosts_group_ops, 1427a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1428a07b4970SChristoph Hellwig }; 1429a07b4970SChristoph Hellwig 1430a07b4970SChristoph Hellwig static struct config_group nvmet_hosts_group; 1431a07b4970SChristoph Hellwig 143266603a31SBhumika Goyal static const struct config_item_type nvmet_root_type = { 1433a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1434a07b4970SChristoph Hellwig }; 1435a07b4970SChristoph Hellwig 1436a07b4970SChristoph Hellwig static struct configfs_subsystem nvmet_configfs_subsystem = { 1437a07b4970SChristoph Hellwig .su_group = { 1438a07b4970SChristoph Hellwig .cg_item = { 1439a07b4970SChristoph Hellwig .ci_namebuf = "nvmet", 1440a07b4970SChristoph Hellwig .ci_type = &nvmet_root_type, 1441a07b4970SChristoph Hellwig }, 1442a07b4970SChristoph Hellwig }, 1443a07b4970SChristoph Hellwig }; 1444a07b4970SChristoph Hellwig 1445a07b4970SChristoph Hellwig int __init nvmet_init_configfs(void) 1446a07b4970SChristoph Hellwig { 1447a07b4970SChristoph Hellwig int ret; 1448a07b4970SChristoph Hellwig 1449a07b4970SChristoph Hellwig config_group_init(&nvmet_configfs_subsystem.su_group); 1450a07b4970SChristoph Hellwig mutex_init(&nvmet_configfs_subsystem.su_mutex); 1451a07b4970SChristoph Hellwig 1452a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_subsystems_group, 1453a07b4970SChristoph Hellwig "subsystems", &nvmet_subsystems_type); 1454a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_subsystems_group, 1455a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1456a07b4970SChristoph Hellwig 1457a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_ports_group, 1458a07b4970SChristoph Hellwig "ports", &nvmet_ports_type); 1459a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_ports_group, 1460a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1461a07b4970SChristoph Hellwig 1462a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_hosts_group, 1463a07b4970SChristoph Hellwig "hosts", &nvmet_hosts_type); 1464a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_hosts_group, 1465a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1466a07b4970SChristoph Hellwig 1467a07b4970SChristoph Hellwig ret = configfs_register_subsystem(&nvmet_configfs_subsystem); 1468a07b4970SChristoph Hellwig if (ret) { 1469a07b4970SChristoph Hellwig pr_err("configfs_register_subsystem: %d\n", ret); 1470a07b4970SChristoph Hellwig return ret; 1471a07b4970SChristoph Hellwig } 1472a07b4970SChristoph Hellwig 1473a07b4970SChristoph Hellwig return 0; 1474a07b4970SChristoph Hellwig } 1475a07b4970SChristoph Hellwig 1476a07b4970SChristoph Hellwig void __exit nvmet_exit_configfs(void) 1477a07b4970SChristoph Hellwig { 1478a07b4970SChristoph Hellwig configfs_unregister_subsystem(&nvmet_configfs_subsystem); 1479a07b4970SChristoph Hellwig } 1480