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" }, 41d02abd19SChaitanya Kulkarni { NVMF_ADDR_FAMILY_LOOP, "loop" }, 427e764179SChaitanya Kulkarni }; 437e764179SChaitanya Kulkarni 443ecb5faaSChaitanya Kulkarni static bool nvmet_is_port_enabled(struct nvmet_port *p, const char *caller) 453ecb5faaSChaitanya Kulkarni { 463ecb5faaSChaitanya Kulkarni if (p->enabled) 473ecb5faaSChaitanya Kulkarni pr_err("Disable port '%u' before changing attribute in %s\n", 483ecb5faaSChaitanya Kulkarni le16_to_cpu(p->disc_addr.portid), caller); 493ecb5faaSChaitanya Kulkarni return p->enabled; 503ecb5faaSChaitanya Kulkarni } 513ecb5faaSChaitanya Kulkarni 52a07b4970SChristoph Hellwig /* 53a07b4970SChristoph Hellwig * nvmet_port Generic ConfigFS definitions. 54a07b4970SChristoph Hellwig * Used in any place in the ConfigFS tree that refers to an address. 55a07b4970SChristoph Hellwig */ 567e764179SChaitanya Kulkarni static ssize_t nvmet_addr_adrfam_show(struct config_item *item, char *page) 57a07b4970SChristoph Hellwig { 587e764179SChaitanya Kulkarni u8 adrfam = to_nvmet_port(item)->disc_addr.adrfam; 597e764179SChaitanya Kulkarni int i; 607e764179SChaitanya Kulkarni 617e764179SChaitanya Kulkarni for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { 627e764179SChaitanya Kulkarni if (nvmet_addr_family[i].type == adrfam) 637e764179SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_addr_family[i].name); 64a07b4970SChristoph Hellwig } 657e764179SChaitanya Kulkarni 667e764179SChaitanya Kulkarni return sprintf(page, "\n"); 67a07b4970SChristoph Hellwig } 68a07b4970SChristoph Hellwig 69a07b4970SChristoph Hellwig static ssize_t nvmet_addr_adrfam_store(struct config_item *item, 70a07b4970SChristoph Hellwig const char *page, size_t count) 71a07b4970SChristoph Hellwig { 72a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 737e764179SChaitanya Kulkarni int i; 74a07b4970SChristoph Hellwig 753ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 76a07b4970SChristoph Hellwig return -EACCES; 77a07b4970SChristoph Hellwig 787e764179SChaitanya Kulkarni for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { 797e764179SChaitanya Kulkarni if (sysfs_streq(page, nvmet_addr_family[i].name)) 807e764179SChaitanya Kulkarni goto found; 81a07b4970SChristoph Hellwig } 82a07b4970SChristoph Hellwig 837e764179SChaitanya Kulkarni pr_err("Invalid value '%s' for adrfam\n", page); 847e764179SChaitanya Kulkarni return -EINVAL; 857e764179SChaitanya Kulkarni 867e764179SChaitanya Kulkarni found: 87d02abd19SChaitanya Kulkarni port->disc_addr.adrfam = nvmet_addr_family[i].type; 88a07b4970SChristoph Hellwig return count; 89a07b4970SChristoph Hellwig } 90a07b4970SChristoph Hellwig 91a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_adrfam); 92a07b4970SChristoph Hellwig 93a07b4970SChristoph Hellwig static ssize_t nvmet_addr_portid_show(struct config_item *item, 94a07b4970SChristoph Hellwig char *page) 95a07b4970SChristoph Hellwig { 96a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 97a07b4970SChristoph Hellwig 98a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", 99a07b4970SChristoph Hellwig le16_to_cpu(port->disc_addr.portid)); 100a07b4970SChristoph Hellwig } 101a07b4970SChristoph Hellwig 102a07b4970SChristoph Hellwig static ssize_t nvmet_addr_portid_store(struct config_item *item, 103a07b4970SChristoph Hellwig const char *page, size_t count) 104a07b4970SChristoph Hellwig { 105a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 106a07b4970SChristoph Hellwig u16 portid = 0; 107a07b4970SChristoph Hellwig 108a07b4970SChristoph Hellwig if (kstrtou16(page, 0, &portid)) { 109a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for portid\n", page); 110a07b4970SChristoph Hellwig return -EINVAL; 111a07b4970SChristoph Hellwig } 112a07b4970SChristoph Hellwig 1133ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 114a07b4970SChristoph Hellwig return -EACCES; 1153ecb5faaSChaitanya Kulkarni 116a07b4970SChristoph Hellwig port->disc_addr.portid = cpu_to_le16(portid); 117a07b4970SChristoph Hellwig return count; 118a07b4970SChristoph Hellwig } 119a07b4970SChristoph Hellwig 120a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_portid); 121a07b4970SChristoph Hellwig 122a07b4970SChristoph Hellwig static ssize_t nvmet_addr_traddr_show(struct config_item *item, 123a07b4970SChristoph Hellwig char *page) 124a07b4970SChristoph Hellwig { 125a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 126a07b4970SChristoph Hellwig 127a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%s\n", 128a07b4970SChristoph Hellwig port->disc_addr.traddr); 129a07b4970SChristoph Hellwig } 130a07b4970SChristoph Hellwig 131a07b4970SChristoph Hellwig static ssize_t nvmet_addr_traddr_store(struct config_item *item, 132a07b4970SChristoph Hellwig const char *page, size_t count) 133a07b4970SChristoph Hellwig { 134a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 135a07b4970SChristoph Hellwig 136a07b4970SChristoph Hellwig if (count > NVMF_TRADDR_SIZE) { 137a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for traddr\n", page); 138a07b4970SChristoph Hellwig return -EINVAL; 139a07b4970SChristoph Hellwig } 140a07b4970SChristoph Hellwig 1413ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 142a07b4970SChristoph Hellwig return -EACCES; 1439ba2a5cbSSagi Grimberg 1449ba2a5cbSSagi Grimberg if (sscanf(page, "%s\n", port->disc_addr.traddr) != 1) 1459ba2a5cbSSagi Grimberg return -EINVAL; 1469ba2a5cbSSagi Grimberg return count; 147a07b4970SChristoph Hellwig } 148a07b4970SChristoph Hellwig 149a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_traddr); 150a07b4970SChristoph Hellwig 15187628e28SChaitanya Kulkarni static const struct nvmet_type_name_map nvmet_addr_treq[] = { 15287628e28SChaitanya Kulkarni { NVMF_TREQ_NOT_SPECIFIED, "not specified" }, 15387628e28SChaitanya Kulkarni { NVMF_TREQ_REQUIRED, "required" }, 15487628e28SChaitanya Kulkarni { NVMF_TREQ_NOT_REQUIRED, "not required" }, 15587628e28SChaitanya Kulkarni }; 15687628e28SChaitanya Kulkarni 15787628e28SChaitanya Kulkarni static ssize_t nvmet_addr_treq_show(struct config_item *item, char *page) 158a07b4970SChristoph Hellwig { 15987628e28SChaitanya Kulkarni u8 treq = to_nvmet_port(item)->disc_addr.treq & 16087628e28SChaitanya Kulkarni NVME_TREQ_SECURE_CHANNEL_MASK; 16187628e28SChaitanya Kulkarni int i; 16287628e28SChaitanya Kulkarni 16387628e28SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) { 16487628e28SChaitanya Kulkarni if (treq == nvmet_addr_treq[i].type) 16587628e28SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_addr_treq[i].name); 166a07b4970SChristoph Hellwig } 16787628e28SChaitanya Kulkarni 16887628e28SChaitanya Kulkarni return sprintf(page, "\n"); 169a07b4970SChristoph Hellwig } 170a07b4970SChristoph Hellwig 171a07b4970SChristoph Hellwig static ssize_t nvmet_addr_treq_store(struct config_item *item, 172a07b4970SChristoph Hellwig const char *page, size_t count) 173a07b4970SChristoph Hellwig { 174a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1750445e1b5SSagi Grimberg u8 treq = port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK; 17687628e28SChaitanya Kulkarni int i; 177a07b4970SChristoph Hellwig 1783ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 179a07b4970SChristoph Hellwig return -EACCES; 180a07b4970SChristoph Hellwig 18187628e28SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) { 18287628e28SChaitanya Kulkarni if (sysfs_streq(page, nvmet_addr_treq[i].name)) 18387628e28SChaitanya Kulkarni goto found; 18487628e28SChaitanya Kulkarni } 18587628e28SChaitanya Kulkarni 186a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for treq\n", page); 187a07b4970SChristoph Hellwig return -EINVAL; 188a07b4970SChristoph Hellwig 18987628e28SChaitanya Kulkarni found: 19087628e28SChaitanya Kulkarni treq |= nvmet_addr_treq[i].type; 19187628e28SChaitanya Kulkarni port->disc_addr.treq = treq; 192a07b4970SChristoph Hellwig return count; 193a07b4970SChristoph Hellwig } 194a07b4970SChristoph Hellwig 195a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_treq); 196a07b4970SChristoph Hellwig 197a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trsvcid_show(struct config_item *item, 198a07b4970SChristoph Hellwig char *page) 199a07b4970SChristoph Hellwig { 200a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 201a07b4970SChristoph Hellwig 202a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%s\n", 203a07b4970SChristoph Hellwig port->disc_addr.trsvcid); 204a07b4970SChristoph Hellwig } 205a07b4970SChristoph Hellwig 206a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trsvcid_store(struct config_item *item, 207a07b4970SChristoph Hellwig const char *page, size_t count) 208a07b4970SChristoph Hellwig { 209a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 210a07b4970SChristoph Hellwig 211a07b4970SChristoph Hellwig if (count > NVMF_TRSVCID_SIZE) { 212a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for trsvcid\n", page); 213a07b4970SChristoph Hellwig return -EINVAL; 214a07b4970SChristoph Hellwig } 2153ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 216a07b4970SChristoph Hellwig return -EACCES; 2179ba2a5cbSSagi Grimberg 2189ba2a5cbSSagi Grimberg if (sscanf(page, "%s\n", port->disc_addr.trsvcid) != 1) 2199ba2a5cbSSagi Grimberg return -EINVAL; 2209ba2a5cbSSagi Grimberg return count; 221a07b4970SChristoph Hellwig } 222a07b4970SChristoph Hellwig 223a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_trsvcid); 224a07b4970SChristoph Hellwig 2250d5ee2b2SSteve Wise static ssize_t nvmet_param_inline_data_size_show(struct config_item *item, 2260d5ee2b2SSteve Wise char *page) 2270d5ee2b2SSteve Wise { 2280d5ee2b2SSteve Wise struct nvmet_port *port = to_nvmet_port(item); 2290d5ee2b2SSteve Wise 2300d5ee2b2SSteve Wise return snprintf(page, PAGE_SIZE, "%d\n", port->inline_data_size); 2310d5ee2b2SSteve Wise } 2320d5ee2b2SSteve Wise 2330d5ee2b2SSteve Wise static ssize_t nvmet_param_inline_data_size_store(struct config_item *item, 2340d5ee2b2SSteve Wise const char *page, size_t count) 2350d5ee2b2SSteve Wise { 2360d5ee2b2SSteve Wise struct nvmet_port *port = to_nvmet_port(item); 2370d5ee2b2SSteve Wise int ret; 2380d5ee2b2SSteve Wise 2393ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 2400d5ee2b2SSteve Wise return -EACCES; 2410d5ee2b2SSteve Wise ret = kstrtoint(page, 0, &port->inline_data_size); 2420d5ee2b2SSteve Wise if (ret) { 2430d5ee2b2SSteve Wise pr_err("Invalid value '%s' for inline_data_size\n", page); 2440d5ee2b2SSteve Wise return -EINVAL; 2450d5ee2b2SSteve Wise } 2460d5ee2b2SSteve Wise return count; 2470d5ee2b2SSteve Wise } 2480d5ee2b2SSteve Wise 2490d5ee2b2SSteve Wise CONFIGFS_ATTR(nvmet_, param_inline_data_size); 2500d5ee2b2SSteve Wise 251a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trtype_show(struct config_item *item, 252a07b4970SChristoph Hellwig char *page) 253a07b4970SChristoph Hellwig { 254a5d18612SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 255a5d18612SChristoph Hellwig int i; 256a5d18612SChristoph Hellwig 25745e2f3c2SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { 25845e2f3c2SChaitanya Kulkarni if (port->disc_addr.trtype == nvmet_transport[i].type) 25945e2f3c2SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_transport[i].name); 260a07b4970SChristoph Hellwig } 261a5d18612SChristoph Hellwig 262a5d18612SChristoph Hellwig return sprintf(page, "\n"); 263a07b4970SChristoph Hellwig } 264a07b4970SChristoph Hellwig 265a07b4970SChristoph Hellwig static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) 266a07b4970SChristoph Hellwig { 267a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED; 268a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED; 269a07b4970SChristoph Hellwig port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM; 270a07b4970SChristoph Hellwig } 271a07b4970SChristoph Hellwig 272a07b4970SChristoph Hellwig static ssize_t nvmet_addr_trtype_store(struct config_item *item, 273a07b4970SChristoph Hellwig const char *page, size_t count) 274a07b4970SChristoph Hellwig { 275a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 276a5d18612SChristoph Hellwig int i; 277a07b4970SChristoph Hellwig 2783ecb5faaSChaitanya Kulkarni if (nvmet_is_port_enabled(port, __func__)) 279a07b4970SChristoph Hellwig return -EACCES; 280a07b4970SChristoph Hellwig 28145e2f3c2SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { 28245e2f3c2SChaitanya Kulkarni if (sysfs_streq(page, nvmet_transport[i].name)) 283a5d18612SChristoph Hellwig goto found; 284a07b4970SChristoph Hellwig } 285a07b4970SChristoph Hellwig 286a5d18612SChristoph Hellwig pr_err("Invalid value '%s' for trtype\n", page); 287a5d18612SChristoph Hellwig return -EINVAL; 2887e764179SChaitanya Kulkarni 289a5d18612SChristoph Hellwig found: 290a5d18612SChristoph Hellwig memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); 29145e2f3c2SChaitanya Kulkarni port->disc_addr.trtype = nvmet_transport[i].type; 292a5d18612SChristoph Hellwig if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) 293a5d18612SChristoph Hellwig nvmet_port_init_tsas_rdma(port); 294a07b4970SChristoph Hellwig return count; 295a07b4970SChristoph Hellwig } 296a07b4970SChristoph Hellwig 297a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_, addr_trtype); 298a07b4970SChristoph Hellwig 299a07b4970SChristoph Hellwig /* 300a07b4970SChristoph Hellwig * Namespace structures & file operation functions below 301a07b4970SChristoph Hellwig */ 302a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page) 303a07b4970SChristoph Hellwig { 304a07b4970SChristoph Hellwig return sprintf(page, "%s\n", to_nvmet_ns(item)->device_path); 305a07b4970SChristoph Hellwig } 306a07b4970SChristoph Hellwig 307a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_path_store(struct config_item *item, 308a07b4970SChristoph Hellwig const char *page, size_t count) 309a07b4970SChristoph Hellwig { 310a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 311a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = ns->subsys; 3125613d312SHannes Reinecke size_t len; 313a07b4970SChristoph Hellwig int ret; 314a07b4970SChristoph Hellwig 315a07b4970SChristoph Hellwig mutex_lock(&subsys->lock); 316a07b4970SChristoph Hellwig ret = -EBUSY; 317e4fcf07cSSolganik Alexander if (ns->enabled) 318a07b4970SChristoph Hellwig goto out_unlock; 319a07b4970SChristoph Hellwig 3205613d312SHannes Reinecke ret = -EINVAL; 3215613d312SHannes Reinecke len = strcspn(page, "\n"); 3225613d312SHannes Reinecke if (!len) 3235613d312SHannes Reinecke goto out_unlock; 324a07b4970SChristoph Hellwig 3255613d312SHannes Reinecke kfree(ns->device_path); 326a07b4970SChristoph Hellwig ret = -ENOMEM; 32709bb8986SChen Zhou ns->device_path = kmemdup_nul(page, len, GFP_KERNEL); 328a07b4970SChristoph Hellwig if (!ns->device_path) 329a07b4970SChristoph Hellwig goto out_unlock; 330a07b4970SChristoph Hellwig 331a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 332a07b4970SChristoph Hellwig return count; 333a07b4970SChristoph Hellwig 334a07b4970SChristoph Hellwig out_unlock: 335a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 336a07b4970SChristoph Hellwig return ret; 337a07b4970SChristoph Hellwig } 338a07b4970SChristoph Hellwig 339a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, device_path); 340a07b4970SChristoph Hellwig 341c6925093SLogan Gunthorpe #ifdef CONFIG_PCI_P2PDMA 342c6925093SLogan Gunthorpe static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page) 343c6925093SLogan Gunthorpe { 344c6925093SLogan Gunthorpe struct nvmet_ns *ns = to_nvmet_ns(item); 345c6925093SLogan Gunthorpe 346c6925093SLogan Gunthorpe return pci_p2pdma_enable_show(page, ns->p2p_dev, ns->use_p2pmem); 347c6925093SLogan Gunthorpe } 348c6925093SLogan Gunthorpe 349c6925093SLogan Gunthorpe static ssize_t nvmet_ns_p2pmem_store(struct config_item *item, 350c6925093SLogan Gunthorpe const char *page, size_t count) 351c6925093SLogan Gunthorpe { 352c6925093SLogan Gunthorpe struct nvmet_ns *ns = to_nvmet_ns(item); 353c6925093SLogan Gunthorpe struct pci_dev *p2p_dev = NULL; 354c6925093SLogan Gunthorpe bool use_p2pmem; 355c6925093SLogan Gunthorpe int ret = count; 356c6925093SLogan Gunthorpe int error; 357c6925093SLogan Gunthorpe 358c6925093SLogan Gunthorpe mutex_lock(&ns->subsys->lock); 359c6925093SLogan Gunthorpe if (ns->enabled) { 360c6925093SLogan Gunthorpe ret = -EBUSY; 361c6925093SLogan Gunthorpe goto out_unlock; 362c6925093SLogan Gunthorpe } 363c6925093SLogan Gunthorpe 364c6925093SLogan Gunthorpe error = pci_p2pdma_enable_store(page, &p2p_dev, &use_p2pmem); 365c6925093SLogan Gunthorpe if (error) { 366c6925093SLogan Gunthorpe ret = error; 367c6925093SLogan Gunthorpe goto out_unlock; 368c6925093SLogan Gunthorpe } 369c6925093SLogan Gunthorpe 370c6925093SLogan Gunthorpe ns->use_p2pmem = use_p2pmem; 371c6925093SLogan Gunthorpe pci_dev_put(ns->p2p_dev); 372c6925093SLogan Gunthorpe ns->p2p_dev = p2p_dev; 373c6925093SLogan Gunthorpe 374c6925093SLogan Gunthorpe out_unlock: 375c6925093SLogan Gunthorpe mutex_unlock(&ns->subsys->lock); 376c6925093SLogan Gunthorpe 377c6925093SLogan Gunthorpe return ret; 378c6925093SLogan Gunthorpe } 379c6925093SLogan Gunthorpe 380c6925093SLogan Gunthorpe CONFIGFS_ATTR(nvmet_ns_, p2pmem); 381c6925093SLogan Gunthorpe #endif /* CONFIG_PCI_P2PDMA */ 382c6925093SLogan Gunthorpe 383430c7befSJohannes Thumshirn static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page) 384430c7befSJohannes Thumshirn { 385430c7befSJohannes Thumshirn return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid); 386430c7befSJohannes Thumshirn } 387430c7befSJohannes Thumshirn 388430c7befSJohannes Thumshirn static ssize_t nvmet_ns_device_uuid_store(struct config_item *item, 389430c7befSJohannes Thumshirn const char *page, size_t count) 390430c7befSJohannes Thumshirn { 391430c7befSJohannes Thumshirn struct nvmet_ns *ns = to_nvmet_ns(item); 392430c7befSJohannes Thumshirn struct nvmet_subsys *subsys = ns->subsys; 393430c7befSJohannes Thumshirn int ret = 0; 394430c7befSJohannes Thumshirn 395430c7befSJohannes Thumshirn mutex_lock(&subsys->lock); 396430c7befSJohannes Thumshirn if (ns->enabled) { 397430c7befSJohannes Thumshirn ret = -EBUSY; 398430c7befSJohannes Thumshirn goto out_unlock; 399430c7befSJohannes Thumshirn } 400430c7befSJohannes Thumshirn 401430c7befSJohannes Thumshirn if (uuid_parse(page, &ns->uuid)) 402430c7befSJohannes Thumshirn ret = -EINVAL; 403430c7befSJohannes Thumshirn 404430c7befSJohannes Thumshirn out_unlock: 405430c7befSJohannes Thumshirn mutex_unlock(&subsys->lock); 406430c7befSJohannes Thumshirn return ret ? ret : count; 407430c7befSJohannes Thumshirn } 408430c7befSJohannes Thumshirn 409f871749aSMax Gurtovoy CONFIGFS_ATTR(nvmet_ns_, device_uuid); 410f871749aSMax Gurtovoy 411a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page) 412a07b4970SChristoph Hellwig { 413a07b4970SChristoph Hellwig return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid); 414a07b4970SChristoph Hellwig } 415a07b4970SChristoph Hellwig 416a07b4970SChristoph Hellwig static ssize_t nvmet_ns_device_nguid_store(struct config_item *item, 417a07b4970SChristoph Hellwig const char *page, size_t count) 418a07b4970SChristoph Hellwig { 419a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 420a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = ns->subsys; 421a07b4970SChristoph Hellwig u8 nguid[16]; 422a07b4970SChristoph Hellwig const char *p = page; 423a07b4970SChristoph Hellwig int i; 424a07b4970SChristoph Hellwig int ret = 0; 425a07b4970SChristoph Hellwig 426a07b4970SChristoph Hellwig mutex_lock(&subsys->lock); 427e4fcf07cSSolganik Alexander if (ns->enabled) { 428a07b4970SChristoph Hellwig ret = -EBUSY; 429a07b4970SChristoph Hellwig goto out_unlock; 430a07b4970SChristoph Hellwig } 431a07b4970SChristoph Hellwig 432a07b4970SChristoph Hellwig for (i = 0; i < 16; i++) { 433a07b4970SChristoph Hellwig if (p + 2 > page + count) { 434a07b4970SChristoph Hellwig ret = -EINVAL; 435a07b4970SChristoph Hellwig goto out_unlock; 436a07b4970SChristoph Hellwig } 437a07b4970SChristoph Hellwig if (!isxdigit(p[0]) || !isxdigit(p[1])) { 438a07b4970SChristoph Hellwig ret = -EINVAL; 439a07b4970SChristoph Hellwig goto out_unlock; 440a07b4970SChristoph Hellwig } 441a07b4970SChristoph Hellwig 442a07b4970SChristoph Hellwig nguid[i] = (hex_to_bin(p[0]) << 4) | hex_to_bin(p[1]); 443a07b4970SChristoph Hellwig p += 2; 444a07b4970SChristoph Hellwig 445a07b4970SChristoph Hellwig if (*p == '-' || *p == ':') 446a07b4970SChristoph Hellwig p++; 447a07b4970SChristoph Hellwig } 448a07b4970SChristoph Hellwig 449a07b4970SChristoph Hellwig memcpy(&ns->nguid, nguid, sizeof(nguid)); 450a07b4970SChristoph Hellwig out_unlock: 451a07b4970SChristoph Hellwig mutex_unlock(&subsys->lock); 452a07b4970SChristoph Hellwig return ret ? ret : count; 453a07b4970SChristoph Hellwig } 454a07b4970SChristoph Hellwig 455a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, device_nguid); 456a07b4970SChristoph Hellwig 45762ac0d32SChristoph Hellwig static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page) 45862ac0d32SChristoph Hellwig { 45962ac0d32SChristoph Hellwig return sprintf(page, "%u\n", to_nvmet_ns(item)->anagrpid); 46062ac0d32SChristoph Hellwig } 46162ac0d32SChristoph Hellwig 46262ac0d32SChristoph Hellwig static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item, 46362ac0d32SChristoph Hellwig const char *page, size_t count) 46462ac0d32SChristoph Hellwig { 46562ac0d32SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 46662ac0d32SChristoph Hellwig u32 oldgrpid, newgrpid; 46762ac0d32SChristoph Hellwig int ret; 46862ac0d32SChristoph Hellwig 46962ac0d32SChristoph Hellwig ret = kstrtou32(page, 0, &newgrpid); 47062ac0d32SChristoph Hellwig if (ret) 47162ac0d32SChristoph Hellwig return ret; 47262ac0d32SChristoph Hellwig 47362ac0d32SChristoph Hellwig if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS) 47462ac0d32SChristoph Hellwig return -EINVAL; 47562ac0d32SChristoph Hellwig 47662ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 47762ac0d32SChristoph Hellwig oldgrpid = ns->anagrpid; 47862ac0d32SChristoph Hellwig nvmet_ana_group_enabled[newgrpid]++; 47962ac0d32SChristoph Hellwig ns->anagrpid = newgrpid; 48062ac0d32SChristoph Hellwig nvmet_ana_group_enabled[oldgrpid]--; 48162ac0d32SChristoph Hellwig nvmet_ana_chgcnt++; 48262ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 48362ac0d32SChristoph Hellwig 48462ac0d32SChristoph Hellwig nvmet_send_ana_event(ns->subsys, NULL); 48562ac0d32SChristoph Hellwig return count; 48662ac0d32SChristoph Hellwig } 48762ac0d32SChristoph Hellwig 48862ac0d32SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, ana_grpid); 48962ac0d32SChristoph Hellwig 490a07b4970SChristoph Hellwig static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page) 491a07b4970SChristoph Hellwig { 492e4fcf07cSSolganik Alexander return sprintf(page, "%d\n", to_nvmet_ns(item)->enabled); 493a07b4970SChristoph Hellwig } 494a07b4970SChristoph Hellwig 495a07b4970SChristoph Hellwig static ssize_t nvmet_ns_enable_store(struct config_item *item, 496a07b4970SChristoph Hellwig const char *page, size_t count) 497a07b4970SChristoph Hellwig { 498a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 499a07b4970SChristoph Hellwig bool enable; 500a07b4970SChristoph Hellwig int ret = 0; 501a07b4970SChristoph Hellwig 502a07b4970SChristoph Hellwig if (strtobool(page, &enable)) 503a07b4970SChristoph Hellwig return -EINVAL; 504a07b4970SChristoph Hellwig 505a07b4970SChristoph Hellwig if (enable) 506a07b4970SChristoph Hellwig ret = nvmet_ns_enable(ns); 507a07b4970SChristoph Hellwig else 508a07b4970SChristoph Hellwig nvmet_ns_disable(ns); 509a07b4970SChristoph Hellwig 510a07b4970SChristoph Hellwig return ret ? ret : count; 511a07b4970SChristoph Hellwig } 512a07b4970SChristoph Hellwig 513a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_ns_, enable); 514a07b4970SChristoph Hellwig 51555eb942eSChaitanya Kulkarni static ssize_t nvmet_ns_buffered_io_show(struct config_item *item, char *page) 51655eb942eSChaitanya Kulkarni { 51755eb942eSChaitanya Kulkarni return sprintf(page, "%d\n", to_nvmet_ns(item)->buffered_io); 51855eb942eSChaitanya Kulkarni } 51955eb942eSChaitanya Kulkarni 52055eb942eSChaitanya Kulkarni static ssize_t nvmet_ns_buffered_io_store(struct config_item *item, 52155eb942eSChaitanya Kulkarni const char *page, size_t count) 52255eb942eSChaitanya Kulkarni { 52355eb942eSChaitanya Kulkarni struct nvmet_ns *ns = to_nvmet_ns(item); 52455eb942eSChaitanya Kulkarni bool val; 52555eb942eSChaitanya Kulkarni 52655eb942eSChaitanya Kulkarni if (strtobool(page, &val)) 52755eb942eSChaitanya Kulkarni return -EINVAL; 52855eb942eSChaitanya Kulkarni 52955eb942eSChaitanya Kulkarni mutex_lock(&ns->subsys->lock); 53055eb942eSChaitanya Kulkarni if (ns->enabled) { 53155eb942eSChaitanya Kulkarni pr_err("disable ns before setting buffered_io value.\n"); 53255eb942eSChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 53355eb942eSChaitanya Kulkarni return -EINVAL; 53455eb942eSChaitanya Kulkarni } 53555eb942eSChaitanya Kulkarni 53655eb942eSChaitanya Kulkarni ns->buffered_io = val; 53755eb942eSChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 53855eb942eSChaitanya Kulkarni return count; 53955eb942eSChaitanya Kulkarni } 54055eb942eSChaitanya Kulkarni 54155eb942eSChaitanya Kulkarni CONFIGFS_ATTR(nvmet_ns_, buffered_io); 54255eb942eSChaitanya Kulkarni 5431f357548SChaitanya Kulkarni static ssize_t nvmet_ns_revalidate_size_store(struct config_item *item, 5441f357548SChaitanya Kulkarni const char *page, size_t count) 5451f357548SChaitanya Kulkarni { 5461f357548SChaitanya Kulkarni struct nvmet_ns *ns = to_nvmet_ns(item); 5471f357548SChaitanya Kulkarni bool val; 5481f357548SChaitanya Kulkarni 5491f357548SChaitanya Kulkarni if (strtobool(page, &val)) 5501f357548SChaitanya Kulkarni return -EINVAL; 5511f357548SChaitanya Kulkarni 5521f357548SChaitanya Kulkarni if (!val) 5531f357548SChaitanya Kulkarni return -EINVAL; 5541f357548SChaitanya Kulkarni 5551f357548SChaitanya Kulkarni mutex_lock(&ns->subsys->lock); 5561f357548SChaitanya Kulkarni if (!ns->enabled) { 5571f357548SChaitanya Kulkarni pr_err("enable ns before revalidate.\n"); 5581f357548SChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 5591f357548SChaitanya Kulkarni return -EINVAL; 5601f357548SChaitanya Kulkarni } 5611f357548SChaitanya Kulkarni nvmet_ns_revalidate(ns); 5621f357548SChaitanya Kulkarni mutex_unlock(&ns->subsys->lock); 5631f357548SChaitanya Kulkarni return count; 5641f357548SChaitanya Kulkarni } 5651f357548SChaitanya Kulkarni 5661f357548SChaitanya Kulkarni CONFIGFS_ATTR_WO(nvmet_ns_, revalidate_size); 5671f357548SChaitanya Kulkarni 568a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_ns_attrs[] = { 569a07b4970SChristoph Hellwig &nvmet_ns_attr_device_path, 570a07b4970SChristoph Hellwig &nvmet_ns_attr_device_nguid, 571430c7befSJohannes Thumshirn &nvmet_ns_attr_device_uuid, 57262ac0d32SChristoph Hellwig &nvmet_ns_attr_ana_grpid, 573a07b4970SChristoph Hellwig &nvmet_ns_attr_enable, 57455eb942eSChaitanya Kulkarni &nvmet_ns_attr_buffered_io, 5751f357548SChaitanya Kulkarni &nvmet_ns_attr_revalidate_size, 576c6925093SLogan Gunthorpe #ifdef CONFIG_PCI_P2PDMA 577c6925093SLogan Gunthorpe &nvmet_ns_attr_p2pmem, 578c6925093SLogan Gunthorpe #endif 579a07b4970SChristoph Hellwig NULL, 580a07b4970SChristoph Hellwig }; 581a07b4970SChristoph Hellwig 582a07b4970SChristoph Hellwig static void nvmet_ns_release(struct config_item *item) 583a07b4970SChristoph Hellwig { 584a07b4970SChristoph Hellwig struct nvmet_ns *ns = to_nvmet_ns(item); 585a07b4970SChristoph Hellwig 586a07b4970SChristoph Hellwig nvmet_ns_free(ns); 587a07b4970SChristoph Hellwig } 588a07b4970SChristoph Hellwig 589a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_ns_item_ops = { 590a07b4970SChristoph Hellwig .release = nvmet_ns_release, 591a07b4970SChristoph Hellwig }; 592a07b4970SChristoph Hellwig 59366603a31SBhumika Goyal static const struct config_item_type nvmet_ns_type = { 594a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_ns_item_ops, 595a07b4970SChristoph Hellwig .ct_attrs = nvmet_ns_attrs, 596a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 597a07b4970SChristoph Hellwig }; 598a07b4970SChristoph Hellwig 599a07b4970SChristoph Hellwig static struct config_group *nvmet_ns_make(struct config_group *group, 600a07b4970SChristoph Hellwig const char *name) 601a07b4970SChristoph Hellwig { 602a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = namespaces_to_subsys(&group->cg_item); 603a07b4970SChristoph Hellwig struct nvmet_ns *ns; 604a07b4970SChristoph Hellwig int ret; 605a07b4970SChristoph Hellwig u32 nsid; 606a07b4970SChristoph Hellwig 607a07b4970SChristoph Hellwig ret = kstrtou32(name, 0, &nsid); 608a07b4970SChristoph Hellwig if (ret) 609a07b4970SChristoph Hellwig goto out; 610a07b4970SChristoph Hellwig 611a07b4970SChristoph Hellwig ret = -EINVAL; 6125ba89503SMikhail Skorzhinskii if (nsid == 0 || nsid == NVME_NSID_ALL) { 6135ba89503SMikhail Skorzhinskii pr_err("invalid nsid %#x", nsid); 614a07b4970SChristoph Hellwig goto out; 6155ba89503SMikhail Skorzhinskii } 616a07b4970SChristoph Hellwig 617a07b4970SChristoph Hellwig ret = -ENOMEM; 618a07b4970SChristoph Hellwig ns = nvmet_ns_alloc(subsys, nsid); 619a07b4970SChristoph Hellwig if (!ns) 620a07b4970SChristoph Hellwig goto out; 621a07b4970SChristoph Hellwig config_group_init_type_name(&ns->group, name, &nvmet_ns_type); 622a07b4970SChristoph Hellwig 623a07b4970SChristoph Hellwig pr_info("adding nsid %d to subsystem %s\n", nsid, subsys->subsysnqn); 624a07b4970SChristoph Hellwig 625a07b4970SChristoph Hellwig return &ns->group; 626a07b4970SChristoph Hellwig out: 627a07b4970SChristoph Hellwig return ERR_PTR(ret); 628a07b4970SChristoph Hellwig } 629a07b4970SChristoph Hellwig 630a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_namespaces_group_ops = { 631a07b4970SChristoph Hellwig .make_group = nvmet_ns_make, 632a07b4970SChristoph Hellwig }; 633a07b4970SChristoph Hellwig 63466603a31SBhumika Goyal static const struct config_item_type nvmet_namespaces_type = { 635a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_namespaces_group_ops, 636a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 637a07b4970SChristoph Hellwig }; 638a07b4970SChristoph Hellwig 639a07b4970SChristoph Hellwig static int nvmet_port_subsys_allow_link(struct config_item *parent, 640a07b4970SChristoph Hellwig struct config_item *target) 641a07b4970SChristoph Hellwig { 642a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(parent->ci_parent); 643a07b4970SChristoph Hellwig struct nvmet_subsys *subsys; 644a07b4970SChristoph Hellwig struct nvmet_subsys_link *link, *p; 645a07b4970SChristoph Hellwig int ret; 646a07b4970SChristoph Hellwig 647a07b4970SChristoph Hellwig if (target->ci_type != &nvmet_subsys_type) { 648a07b4970SChristoph Hellwig pr_err("can only link subsystems into the subsystems dir.!\n"); 649a07b4970SChristoph Hellwig return -EINVAL; 650a07b4970SChristoph Hellwig } 651a07b4970SChristoph Hellwig subsys = to_subsys(target); 652a07b4970SChristoph Hellwig link = kmalloc(sizeof(*link), GFP_KERNEL); 653a07b4970SChristoph Hellwig if (!link) 654a07b4970SChristoph Hellwig return -ENOMEM; 655a07b4970SChristoph Hellwig link->subsys = subsys; 656a07b4970SChristoph Hellwig 657a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 658a07b4970SChristoph Hellwig ret = -EEXIST; 659a07b4970SChristoph Hellwig list_for_each_entry(p, &port->subsystems, entry) { 660a07b4970SChristoph Hellwig if (p->subsys == subsys) 661a07b4970SChristoph Hellwig goto out_free_link; 662a07b4970SChristoph Hellwig } 663a07b4970SChristoph Hellwig 664a07b4970SChristoph Hellwig if (list_empty(&port->subsystems)) { 665a07b4970SChristoph Hellwig ret = nvmet_enable_port(port); 666a07b4970SChristoph Hellwig if (ret) 667a07b4970SChristoph Hellwig goto out_free_link; 668a07b4970SChristoph Hellwig } 669a07b4970SChristoph Hellwig 670a07b4970SChristoph Hellwig list_add_tail(&link->entry, &port->subsystems); 671b662a078SJay Sternberg nvmet_port_disc_changed(port, subsys); 672b662a078SJay Sternberg 673a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 674a07b4970SChristoph Hellwig return 0; 675a07b4970SChristoph Hellwig 676a07b4970SChristoph Hellwig out_free_link: 677a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 678a07b4970SChristoph Hellwig kfree(link); 679a07b4970SChristoph Hellwig return ret; 680a07b4970SChristoph Hellwig } 681a07b4970SChristoph Hellwig 682e16769d4SAndrzej Pietrasiewicz static void nvmet_port_subsys_drop_link(struct config_item *parent, 683a07b4970SChristoph Hellwig struct config_item *target) 684a07b4970SChristoph Hellwig { 685a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(parent->ci_parent); 686a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(target); 687a07b4970SChristoph Hellwig struct nvmet_subsys_link *p; 688a07b4970SChristoph Hellwig 689a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 690a07b4970SChristoph Hellwig list_for_each_entry(p, &port->subsystems, entry) { 691a07b4970SChristoph Hellwig if (p->subsys == subsys) 692a07b4970SChristoph Hellwig goto found; 693a07b4970SChristoph Hellwig } 694a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 695e16769d4SAndrzej Pietrasiewicz return; 696a07b4970SChristoph Hellwig 697a07b4970SChristoph Hellwig found: 698a07b4970SChristoph Hellwig list_del(&p->entry); 6993aed8673SLogan Gunthorpe nvmet_port_del_ctrls(port, subsys); 700b662a078SJay Sternberg nvmet_port_disc_changed(port, subsys); 701b662a078SJay Sternberg 702a07b4970SChristoph Hellwig if (list_empty(&port->subsystems)) 703a07b4970SChristoph Hellwig nvmet_disable_port(port); 704a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 705a07b4970SChristoph Hellwig kfree(p); 706a07b4970SChristoph Hellwig } 707a07b4970SChristoph Hellwig 708a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_port_subsys_item_ops = { 709a07b4970SChristoph Hellwig .allow_link = nvmet_port_subsys_allow_link, 710a07b4970SChristoph Hellwig .drop_link = nvmet_port_subsys_drop_link, 711a07b4970SChristoph Hellwig }; 712a07b4970SChristoph Hellwig 71366603a31SBhumika Goyal static const struct config_item_type nvmet_port_subsys_type = { 714a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_port_subsys_item_ops, 715a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 716a07b4970SChristoph Hellwig }; 717a07b4970SChristoph Hellwig 718a07b4970SChristoph Hellwig static int nvmet_allowed_hosts_allow_link(struct config_item *parent, 719a07b4970SChristoph Hellwig struct config_item *target) 720a07b4970SChristoph Hellwig { 721a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); 722a07b4970SChristoph Hellwig struct nvmet_host *host; 723a07b4970SChristoph Hellwig struct nvmet_host_link *link, *p; 724a07b4970SChristoph Hellwig int ret; 725a07b4970SChristoph Hellwig 726a07b4970SChristoph Hellwig if (target->ci_type != &nvmet_host_type) { 727a07b4970SChristoph Hellwig pr_err("can only link hosts into the allowed_hosts directory!\n"); 728a07b4970SChristoph Hellwig return -EINVAL; 729a07b4970SChristoph Hellwig } 730a07b4970SChristoph Hellwig 731a07b4970SChristoph Hellwig host = to_host(target); 732a07b4970SChristoph Hellwig link = kmalloc(sizeof(*link), GFP_KERNEL); 733a07b4970SChristoph Hellwig if (!link) 734a07b4970SChristoph Hellwig return -ENOMEM; 735a07b4970SChristoph Hellwig link->host = host; 736a07b4970SChristoph Hellwig 737a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 738a07b4970SChristoph Hellwig ret = -EINVAL; 739a07b4970SChristoph Hellwig if (subsys->allow_any_host) { 740a07b4970SChristoph Hellwig pr_err("can't add hosts when allow_any_host is set!\n"); 741a07b4970SChristoph Hellwig goto out_free_link; 742a07b4970SChristoph Hellwig } 743a07b4970SChristoph Hellwig 744a07b4970SChristoph Hellwig ret = -EEXIST; 745a07b4970SChristoph Hellwig list_for_each_entry(p, &subsys->hosts, entry) { 746a07b4970SChristoph Hellwig if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) 747a07b4970SChristoph Hellwig goto out_free_link; 748a07b4970SChristoph Hellwig } 749a07b4970SChristoph Hellwig list_add_tail(&link->entry, &subsys->hosts); 750b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, host); 751b662a078SJay Sternberg 752a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 753a07b4970SChristoph Hellwig return 0; 754a07b4970SChristoph Hellwig out_free_link: 755a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 756a07b4970SChristoph Hellwig kfree(link); 757a07b4970SChristoph Hellwig return ret; 758a07b4970SChristoph Hellwig } 759a07b4970SChristoph Hellwig 760e16769d4SAndrzej Pietrasiewicz static void nvmet_allowed_hosts_drop_link(struct config_item *parent, 761a07b4970SChristoph Hellwig struct config_item *target) 762a07b4970SChristoph Hellwig { 763a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); 764a07b4970SChristoph Hellwig struct nvmet_host *host = to_host(target); 765a07b4970SChristoph Hellwig struct nvmet_host_link *p; 766a07b4970SChristoph Hellwig 767a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 768a07b4970SChristoph Hellwig list_for_each_entry(p, &subsys->hosts, entry) { 769a07b4970SChristoph Hellwig if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) 770a07b4970SChristoph Hellwig goto found; 771a07b4970SChristoph Hellwig } 772a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 773e16769d4SAndrzej Pietrasiewicz return; 774a07b4970SChristoph Hellwig 775a07b4970SChristoph Hellwig found: 776a07b4970SChristoph Hellwig list_del(&p->entry); 777b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, host); 778b662a078SJay Sternberg 779a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 780a07b4970SChristoph Hellwig kfree(p); 781a07b4970SChristoph Hellwig } 782a07b4970SChristoph Hellwig 783a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_allowed_hosts_item_ops = { 784a07b4970SChristoph Hellwig .allow_link = nvmet_allowed_hosts_allow_link, 785a07b4970SChristoph Hellwig .drop_link = nvmet_allowed_hosts_drop_link, 786a07b4970SChristoph Hellwig }; 787a07b4970SChristoph Hellwig 78866603a31SBhumika Goyal static const struct config_item_type nvmet_allowed_hosts_type = { 789a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_allowed_hosts_item_ops, 790a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 791a07b4970SChristoph Hellwig }; 792a07b4970SChristoph Hellwig 793a07b4970SChristoph Hellwig static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item, 794a07b4970SChristoph Hellwig char *page) 795a07b4970SChristoph Hellwig { 796a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", 797a07b4970SChristoph Hellwig to_subsys(item)->allow_any_host); 798a07b4970SChristoph Hellwig } 799a07b4970SChristoph Hellwig 800a07b4970SChristoph Hellwig static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, 801a07b4970SChristoph Hellwig const char *page, size_t count) 802a07b4970SChristoph Hellwig { 803a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(item); 804a07b4970SChristoph Hellwig bool allow_any_host; 805a07b4970SChristoph Hellwig int ret = 0; 806a07b4970SChristoph Hellwig 807a07b4970SChristoph Hellwig if (strtobool(page, &allow_any_host)) 808a07b4970SChristoph Hellwig return -EINVAL; 809a07b4970SChristoph Hellwig 810a07b4970SChristoph Hellwig down_write(&nvmet_config_sem); 811a07b4970SChristoph Hellwig if (allow_any_host && !list_empty(&subsys->hosts)) { 812a07b4970SChristoph Hellwig pr_err("Can't set allow_any_host when explicit hosts are set!\n"); 813a07b4970SChristoph Hellwig ret = -EINVAL; 814a07b4970SChristoph Hellwig goto out_unlock; 815a07b4970SChristoph Hellwig } 816a07b4970SChristoph Hellwig 817b662a078SJay Sternberg if (subsys->allow_any_host != allow_any_host) { 818a07b4970SChristoph Hellwig subsys->allow_any_host = allow_any_host; 819b662a078SJay Sternberg nvmet_subsys_disc_changed(subsys, NULL); 820b662a078SJay Sternberg } 821b662a078SJay Sternberg 822a07b4970SChristoph Hellwig out_unlock: 823a07b4970SChristoph Hellwig up_write(&nvmet_config_sem); 824a07b4970SChristoph Hellwig return ret ? ret : count; 825a07b4970SChristoph Hellwig } 826a07b4970SChristoph Hellwig 827a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); 828a07b4970SChristoph Hellwig 82941528f80SJohannes Thumshirn static ssize_t nvmet_subsys_attr_version_show(struct config_item *item, 830c61d788bSJohannes Thumshirn char *page) 831c61d788bSJohannes Thumshirn { 832c61d788bSJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 833c61d788bSJohannes Thumshirn 834c61d788bSJohannes Thumshirn if (NVME_TERTIARY(subsys->ver)) 835c61d788bSJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%d.%d.%d\n", 836c61d788bSJohannes Thumshirn (int)NVME_MAJOR(subsys->ver), 837c61d788bSJohannes Thumshirn (int)NVME_MINOR(subsys->ver), 838c61d788bSJohannes Thumshirn (int)NVME_TERTIARY(subsys->ver)); 839527123c7SChaitanya Kulkarni 840c61d788bSJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%d.%d\n", 841c61d788bSJohannes Thumshirn (int)NVME_MAJOR(subsys->ver), 842c61d788bSJohannes Thumshirn (int)NVME_MINOR(subsys->ver)); 843c61d788bSJohannes Thumshirn } 844c61d788bSJohannes Thumshirn 84541528f80SJohannes Thumshirn static ssize_t nvmet_subsys_attr_version_store(struct config_item *item, 846c61d788bSJohannes Thumshirn const char *page, size_t count) 847c61d788bSJohannes Thumshirn { 848c61d788bSJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 849c61d788bSJohannes Thumshirn int major, minor, tertiary = 0; 850c61d788bSJohannes Thumshirn int ret; 851c61d788bSJohannes Thumshirn 852c61d788bSJohannes Thumshirn ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary); 853c61d788bSJohannes Thumshirn if (ret != 2 && ret != 3) 854c61d788bSJohannes Thumshirn return -EINVAL; 855c61d788bSJohannes Thumshirn 856c61d788bSJohannes Thumshirn down_write(&nvmet_config_sem); 857c61d788bSJohannes Thumshirn subsys->ver = NVME_VS(major, minor, tertiary); 858c61d788bSJohannes Thumshirn up_write(&nvmet_config_sem); 859c61d788bSJohannes Thumshirn 860c61d788bSJohannes Thumshirn return count; 861c61d788bSJohannes Thumshirn } 86241528f80SJohannes Thumshirn CONFIGFS_ATTR(nvmet_subsys_, attr_version); 863c61d788bSJohannes Thumshirn 864fcbc5459SJohannes Thumshirn static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item, 865fcbc5459SJohannes Thumshirn char *page) 866fcbc5459SJohannes Thumshirn { 867fcbc5459SJohannes Thumshirn struct nvmet_subsys *subsys = to_subsys(item); 868fcbc5459SJohannes Thumshirn 869fcbc5459SJohannes Thumshirn return snprintf(page, PAGE_SIZE, "%llx\n", subsys->serial); 870fcbc5459SJohannes Thumshirn } 871fcbc5459SJohannes Thumshirn 872fcbc5459SJohannes Thumshirn static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item, 873fcbc5459SJohannes Thumshirn const char *page, size_t count) 874fcbc5459SJohannes Thumshirn { 875d3a9b0caSChaitanya Kulkarni u64 serial; 876d3a9b0caSChaitanya Kulkarni 877d3a9b0caSChaitanya Kulkarni if (sscanf(page, "%llx\n", &serial) != 1) 878d3a9b0caSChaitanya Kulkarni return -EINVAL; 879fcbc5459SJohannes Thumshirn 880fcbc5459SJohannes Thumshirn down_write(&nvmet_config_sem); 881d3a9b0caSChaitanya Kulkarni to_subsys(item)->serial = serial; 882fcbc5459SJohannes Thumshirn up_write(&nvmet_config_sem); 883fcbc5459SJohannes Thumshirn 884fcbc5459SJohannes Thumshirn return count; 885fcbc5459SJohannes Thumshirn } 886fcbc5459SJohannes Thumshirn CONFIGFS_ATTR(nvmet_subsys_, attr_serial); 887fcbc5459SJohannes Thumshirn 88894a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item, 88994a39d61SChaitanya Kulkarni char *page) 89094a39d61SChaitanya Kulkarni { 89194a39d61SChaitanya Kulkarni return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_min); 89294a39d61SChaitanya Kulkarni } 89394a39d61SChaitanya Kulkarni 89494a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item, 89594a39d61SChaitanya Kulkarni const char *page, size_t cnt) 89694a39d61SChaitanya Kulkarni { 89794a39d61SChaitanya Kulkarni u16 cntlid_min; 89894a39d61SChaitanya Kulkarni 89994a39d61SChaitanya Kulkarni if (sscanf(page, "%hu\n", &cntlid_min) != 1) 90094a39d61SChaitanya Kulkarni return -EINVAL; 90194a39d61SChaitanya Kulkarni 90294a39d61SChaitanya Kulkarni if (cntlid_min == 0) 90394a39d61SChaitanya Kulkarni return -EINVAL; 90494a39d61SChaitanya Kulkarni 90594a39d61SChaitanya Kulkarni down_write(&nvmet_config_sem); 90694a39d61SChaitanya Kulkarni if (cntlid_min >= to_subsys(item)->cntlid_max) 90794a39d61SChaitanya Kulkarni goto out_unlock; 90894a39d61SChaitanya Kulkarni to_subsys(item)->cntlid_min = cntlid_min; 90994a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 91094a39d61SChaitanya Kulkarni return cnt; 91194a39d61SChaitanya Kulkarni 91294a39d61SChaitanya Kulkarni out_unlock: 91394a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 91494a39d61SChaitanya Kulkarni return -EINVAL; 91594a39d61SChaitanya Kulkarni } 91694a39d61SChaitanya Kulkarni CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min); 91794a39d61SChaitanya Kulkarni 91894a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item, 91994a39d61SChaitanya Kulkarni char *page) 92094a39d61SChaitanya Kulkarni { 92194a39d61SChaitanya Kulkarni return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_max); 92294a39d61SChaitanya Kulkarni } 92394a39d61SChaitanya Kulkarni 92494a39d61SChaitanya Kulkarni static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item, 92594a39d61SChaitanya Kulkarni const char *page, size_t cnt) 92694a39d61SChaitanya Kulkarni { 92794a39d61SChaitanya Kulkarni u16 cntlid_max; 92894a39d61SChaitanya Kulkarni 92994a39d61SChaitanya Kulkarni if (sscanf(page, "%hu\n", &cntlid_max) != 1) 93094a39d61SChaitanya Kulkarni return -EINVAL; 93194a39d61SChaitanya Kulkarni 93294a39d61SChaitanya Kulkarni if (cntlid_max == 0) 93394a39d61SChaitanya Kulkarni return -EINVAL; 93494a39d61SChaitanya Kulkarni 93594a39d61SChaitanya Kulkarni down_write(&nvmet_config_sem); 93694a39d61SChaitanya Kulkarni if (cntlid_max <= to_subsys(item)->cntlid_min) 93794a39d61SChaitanya Kulkarni goto out_unlock; 93894a39d61SChaitanya Kulkarni to_subsys(item)->cntlid_max = cntlid_max; 93994a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 94094a39d61SChaitanya Kulkarni return cnt; 94194a39d61SChaitanya Kulkarni 94294a39d61SChaitanya Kulkarni out_unlock: 94394a39d61SChaitanya Kulkarni up_write(&nvmet_config_sem); 94494a39d61SChaitanya Kulkarni return -EINVAL; 94594a39d61SChaitanya Kulkarni } 94694a39d61SChaitanya Kulkarni CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max); 94794a39d61SChaitanya Kulkarni 948013b7ebeSMark Ruijter static ssize_t nvmet_subsys_attr_model_show(struct config_item *item, 949013b7ebeSMark Ruijter char *page) 950013b7ebeSMark Ruijter { 951013b7ebeSMark Ruijter struct nvmet_subsys *subsys = to_subsys(item); 952013b7ebeSMark Ruijter struct nvmet_subsys_model *subsys_model; 953013b7ebeSMark Ruijter char *model = NVMET_DEFAULT_CTRL_MODEL; 954013b7ebeSMark Ruijter int ret; 955013b7ebeSMark Ruijter 956013b7ebeSMark Ruijter rcu_read_lock(); 957013b7ebeSMark Ruijter subsys_model = rcu_dereference(subsys->model); 958013b7ebeSMark Ruijter if (subsys_model) 959013b7ebeSMark Ruijter model = subsys_model->number; 960013b7ebeSMark Ruijter ret = snprintf(page, PAGE_SIZE, "%s\n", model); 961013b7ebeSMark Ruijter rcu_read_unlock(); 962013b7ebeSMark Ruijter 963013b7ebeSMark Ruijter return ret; 964013b7ebeSMark Ruijter } 965013b7ebeSMark Ruijter 966013b7ebeSMark Ruijter /* See Section 1.5 of NVMe 1.4 */ 967013b7ebeSMark Ruijter static bool nvmet_is_ascii(const char c) 968013b7ebeSMark Ruijter { 969013b7ebeSMark Ruijter return c >= 0x20 && c <= 0x7e; 970013b7ebeSMark Ruijter } 971013b7ebeSMark Ruijter 972013b7ebeSMark Ruijter static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, 973013b7ebeSMark Ruijter const char *page, size_t count) 974013b7ebeSMark Ruijter { 975013b7ebeSMark Ruijter struct nvmet_subsys *subsys = to_subsys(item); 976013b7ebeSMark Ruijter struct nvmet_subsys_model *new_model; 977013b7ebeSMark Ruijter char *new_model_number; 978013b7ebeSMark Ruijter int pos = 0, len; 979013b7ebeSMark Ruijter 980013b7ebeSMark Ruijter len = strcspn(page, "\n"); 981013b7ebeSMark Ruijter if (!len) 982013b7ebeSMark Ruijter return -EINVAL; 983013b7ebeSMark Ruijter 984013b7ebeSMark Ruijter for (pos = 0; pos < len; pos++) { 985013b7ebeSMark Ruijter if (!nvmet_is_ascii(page[pos])) 986013b7ebeSMark Ruijter return -EINVAL; 987013b7ebeSMark Ruijter } 988013b7ebeSMark Ruijter 98909bb8986SChen Zhou new_model_number = kmemdup_nul(page, len, GFP_KERNEL); 990013b7ebeSMark Ruijter if (!new_model_number) 991013b7ebeSMark Ruijter return -ENOMEM; 992013b7ebeSMark Ruijter 993013b7ebeSMark Ruijter new_model = kzalloc(sizeof(*new_model) + len + 1, GFP_KERNEL); 994013b7ebeSMark Ruijter if (!new_model) { 995013b7ebeSMark Ruijter kfree(new_model_number); 996013b7ebeSMark Ruijter return -ENOMEM; 997013b7ebeSMark Ruijter } 998013b7ebeSMark Ruijter memcpy(new_model->number, new_model_number, len); 999013b7ebeSMark Ruijter 1000013b7ebeSMark Ruijter down_write(&nvmet_config_sem); 1001013b7ebeSMark Ruijter mutex_lock(&subsys->lock); 1002013b7ebeSMark Ruijter new_model = rcu_replace_pointer(subsys->model, new_model, 1003013b7ebeSMark Ruijter mutex_is_locked(&subsys->lock)); 1004013b7ebeSMark Ruijter mutex_unlock(&subsys->lock); 1005013b7ebeSMark Ruijter up_write(&nvmet_config_sem); 1006013b7ebeSMark Ruijter 1007013b7ebeSMark Ruijter kfree_rcu(new_model, rcuhead); 1008013b7ebeSMark Ruijter 1009013b7ebeSMark Ruijter return count; 1010013b7ebeSMark Ruijter } 1011013b7ebeSMark Ruijter CONFIGFS_ATTR(nvmet_subsys_, attr_model); 1012013b7ebeSMark Ruijter 1013a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_subsys_attrs[] = { 1014a07b4970SChristoph Hellwig &nvmet_subsys_attr_attr_allow_any_host, 101541528f80SJohannes Thumshirn &nvmet_subsys_attr_attr_version, 1016fcbc5459SJohannes Thumshirn &nvmet_subsys_attr_attr_serial, 101794a39d61SChaitanya Kulkarni &nvmet_subsys_attr_attr_cntlid_min, 101894a39d61SChaitanya Kulkarni &nvmet_subsys_attr_attr_cntlid_max, 1019013b7ebeSMark Ruijter &nvmet_subsys_attr_attr_model, 1020a07b4970SChristoph Hellwig NULL, 1021a07b4970SChristoph Hellwig }; 1022a07b4970SChristoph Hellwig 1023a07b4970SChristoph Hellwig /* 1024a07b4970SChristoph Hellwig * Subsystem structures & folder operation functions below 1025a07b4970SChristoph Hellwig */ 1026a07b4970SChristoph Hellwig static void nvmet_subsys_release(struct config_item *item) 1027a07b4970SChristoph Hellwig { 1028a07b4970SChristoph Hellwig struct nvmet_subsys *subsys = to_subsys(item); 1029a07b4970SChristoph Hellwig 1030344770b0SSagi Grimberg nvmet_subsys_del_ctrls(subsys); 1031a07b4970SChristoph Hellwig nvmet_subsys_put(subsys); 1032a07b4970SChristoph Hellwig } 1033a07b4970SChristoph Hellwig 1034a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_subsys_item_ops = { 1035a07b4970SChristoph Hellwig .release = nvmet_subsys_release, 1036a07b4970SChristoph Hellwig }; 1037a07b4970SChristoph Hellwig 103866603a31SBhumika Goyal static const struct config_item_type nvmet_subsys_type = { 1039a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_subsys_item_ops, 1040a07b4970SChristoph Hellwig .ct_attrs = nvmet_subsys_attrs, 1041a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1042a07b4970SChristoph Hellwig }; 1043a07b4970SChristoph Hellwig 1044a07b4970SChristoph Hellwig static struct config_group *nvmet_subsys_make(struct config_group *group, 1045a07b4970SChristoph Hellwig const char *name) 1046a07b4970SChristoph Hellwig { 1047a07b4970SChristoph Hellwig struct nvmet_subsys *subsys; 1048a07b4970SChristoph Hellwig 1049a07b4970SChristoph Hellwig if (sysfs_streq(name, NVME_DISC_SUBSYS_NAME)) { 1050a07b4970SChristoph Hellwig pr_err("can't create discovery subsystem through configfs\n"); 1051a07b4970SChristoph Hellwig return ERR_PTR(-EINVAL); 1052a07b4970SChristoph Hellwig } 1053a07b4970SChristoph Hellwig 1054a07b4970SChristoph Hellwig subsys = nvmet_subsys_alloc(name, NVME_NQN_NVME); 10556b7e631bSMinwoo Im if (IS_ERR(subsys)) 10566b7e631bSMinwoo Im return ERR_CAST(subsys); 1057a07b4970SChristoph Hellwig 1058a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->group, name, &nvmet_subsys_type); 1059a07b4970SChristoph Hellwig 1060a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->namespaces_group, 1061a07b4970SChristoph Hellwig "namespaces", &nvmet_namespaces_type); 1062a07b4970SChristoph Hellwig configfs_add_default_group(&subsys->namespaces_group, &subsys->group); 1063a07b4970SChristoph Hellwig 1064a07b4970SChristoph Hellwig config_group_init_type_name(&subsys->allowed_hosts_group, 1065a07b4970SChristoph Hellwig "allowed_hosts", &nvmet_allowed_hosts_type); 1066a07b4970SChristoph Hellwig configfs_add_default_group(&subsys->allowed_hosts_group, 1067a07b4970SChristoph Hellwig &subsys->group); 1068a07b4970SChristoph Hellwig 1069a07b4970SChristoph Hellwig return &subsys->group; 1070a07b4970SChristoph Hellwig } 1071a07b4970SChristoph Hellwig 1072a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_subsystems_group_ops = { 1073a07b4970SChristoph Hellwig .make_group = nvmet_subsys_make, 1074a07b4970SChristoph Hellwig }; 1075a07b4970SChristoph Hellwig 107666603a31SBhumika Goyal static const struct config_item_type nvmet_subsystems_type = { 1077a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_subsystems_group_ops, 1078a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1079a07b4970SChristoph Hellwig }; 1080a07b4970SChristoph Hellwig 1081a07b4970SChristoph Hellwig static ssize_t nvmet_referral_enable_show(struct config_item *item, 1082a07b4970SChristoph Hellwig char *page) 1083a07b4970SChristoph Hellwig { 1084a07b4970SChristoph Hellwig return snprintf(page, PAGE_SIZE, "%d\n", to_nvmet_port(item)->enabled); 1085a07b4970SChristoph Hellwig } 1086a07b4970SChristoph Hellwig 1087a07b4970SChristoph Hellwig static ssize_t nvmet_referral_enable_store(struct config_item *item, 1088a07b4970SChristoph Hellwig const char *page, size_t count) 1089a07b4970SChristoph Hellwig { 1090a07b4970SChristoph Hellwig struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); 1091a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1092a07b4970SChristoph Hellwig bool enable; 1093a07b4970SChristoph Hellwig 1094a07b4970SChristoph Hellwig if (strtobool(page, &enable)) 1095a07b4970SChristoph Hellwig goto inval; 1096a07b4970SChristoph Hellwig 1097a07b4970SChristoph Hellwig if (enable) 1098a07b4970SChristoph Hellwig nvmet_referral_enable(parent, port); 1099a07b4970SChristoph Hellwig else 1100b662a078SJay Sternberg nvmet_referral_disable(parent, port); 1101a07b4970SChristoph Hellwig 1102a07b4970SChristoph Hellwig return count; 1103a07b4970SChristoph Hellwig inval: 1104a07b4970SChristoph Hellwig pr_err("Invalid value '%s' for enable\n", page); 1105a07b4970SChristoph Hellwig return -EINVAL; 1106a07b4970SChristoph Hellwig } 1107a07b4970SChristoph Hellwig 1108a07b4970SChristoph Hellwig CONFIGFS_ATTR(nvmet_referral_, enable); 1109a07b4970SChristoph Hellwig 1110a07b4970SChristoph Hellwig /* 1111a07b4970SChristoph Hellwig * Discovery Service subsystem definitions 1112a07b4970SChristoph Hellwig */ 1113a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_referral_attrs[] = { 1114a07b4970SChristoph Hellwig &nvmet_attr_addr_adrfam, 1115a07b4970SChristoph Hellwig &nvmet_attr_addr_portid, 1116a07b4970SChristoph Hellwig &nvmet_attr_addr_treq, 1117a07b4970SChristoph Hellwig &nvmet_attr_addr_traddr, 1118a07b4970SChristoph Hellwig &nvmet_attr_addr_trsvcid, 1119a07b4970SChristoph Hellwig &nvmet_attr_addr_trtype, 1120a07b4970SChristoph Hellwig &nvmet_referral_attr_enable, 1121a07b4970SChristoph Hellwig NULL, 1122a07b4970SChristoph Hellwig }; 1123a07b4970SChristoph Hellwig 1124f0e656e4SSagi Grimberg static void nvmet_referral_notify(struct config_group *group, 1125f0e656e4SSagi Grimberg struct config_item *item) 1126a07b4970SChristoph Hellwig { 1127b662a078SJay Sternberg struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); 1128a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1129a07b4970SChristoph Hellwig 1130b662a078SJay Sternberg nvmet_referral_disable(parent, port); 1131f0e656e4SSagi Grimberg } 1132f0e656e4SSagi Grimberg 1133f0e656e4SSagi Grimberg static void nvmet_referral_release(struct config_item *item) 1134f0e656e4SSagi Grimberg { 1135f0e656e4SSagi Grimberg struct nvmet_port *port = to_nvmet_port(item); 1136f0e656e4SSagi Grimberg 1137a07b4970SChristoph Hellwig kfree(port); 1138a07b4970SChristoph Hellwig } 1139a07b4970SChristoph Hellwig 1140a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_referral_item_ops = { 1141a07b4970SChristoph Hellwig .release = nvmet_referral_release, 1142a07b4970SChristoph Hellwig }; 1143a07b4970SChristoph Hellwig 114466603a31SBhumika Goyal static const struct config_item_type nvmet_referral_type = { 1145a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1146a07b4970SChristoph Hellwig .ct_attrs = nvmet_referral_attrs, 1147a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_referral_item_ops, 1148a07b4970SChristoph Hellwig }; 1149a07b4970SChristoph Hellwig 1150a07b4970SChristoph Hellwig static struct config_group *nvmet_referral_make( 1151a07b4970SChristoph Hellwig struct config_group *group, const char *name) 1152a07b4970SChristoph Hellwig { 1153a07b4970SChristoph Hellwig struct nvmet_port *port; 1154a07b4970SChristoph Hellwig 1155a07b4970SChristoph Hellwig port = kzalloc(sizeof(*port), GFP_KERNEL); 1156a07b4970SChristoph Hellwig if (!port) 1157f98d9ca1SDan Carpenter return ERR_PTR(-ENOMEM); 1158a07b4970SChristoph Hellwig 1159a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->entry); 1160a07b4970SChristoph Hellwig config_group_init_type_name(&port->group, name, &nvmet_referral_type); 1161a07b4970SChristoph Hellwig 1162a07b4970SChristoph Hellwig return &port->group; 1163a07b4970SChristoph Hellwig } 1164a07b4970SChristoph Hellwig 1165a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_referral_group_ops = { 1166a07b4970SChristoph Hellwig .make_group = nvmet_referral_make, 1167f0e656e4SSagi Grimberg .disconnect_notify = nvmet_referral_notify, 1168a07b4970SChristoph Hellwig }; 1169a07b4970SChristoph Hellwig 117066603a31SBhumika Goyal static const struct config_item_type nvmet_referrals_type = { 1171a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1172a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_referral_group_ops, 1173a07b4970SChristoph Hellwig }; 1174a07b4970SChristoph Hellwig 117574255969SChristoph Hellwig static struct nvmet_type_name_map nvmet_ana_state[] = { 117662ac0d32SChristoph Hellwig { NVME_ANA_OPTIMIZED, "optimized" }, 117762ac0d32SChristoph Hellwig { NVME_ANA_NONOPTIMIZED, "non-optimized" }, 117862ac0d32SChristoph Hellwig { NVME_ANA_INACCESSIBLE, "inaccessible" }, 117962ac0d32SChristoph Hellwig { NVME_ANA_PERSISTENT_LOSS, "persistent-loss" }, 118062ac0d32SChristoph Hellwig { NVME_ANA_CHANGE, "change" }, 118162ac0d32SChristoph Hellwig }; 118262ac0d32SChristoph Hellwig 118362ac0d32SChristoph Hellwig static ssize_t nvmet_ana_group_ana_state_show(struct config_item *item, 118462ac0d32SChristoph Hellwig char *page) 118562ac0d32SChristoph Hellwig { 118662ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 118762ac0d32SChristoph Hellwig enum nvme_ana_state state = grp->port->ana_state[grp->grpid]; 118862ac0d32SChristoph Hellwig int i; 118962ac0d32SChristoph Hellwig 119084b8d0d7SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) { 119184b8d0d7SChaitanya Kulkarni if (state == nvmet_ana_state[i].type) 119284b8d0d7SChaitanya Kulkarni return sprintf(page, "%s\n", nvmet_ana_state[i].name); 119362ac0d32SChristoph Hellwig } 119462ac0d32SChristoph Hellwig 119562ac0d32SChristoph Hellwig return sprintf(page, "\n"); 119662ac0d32SChristoph Hellwig } 119762ac0d32SChristoph Hellwig 119862ac0d32SChristoph Hellwig static ssize_t nvmet_ana_group_ana_state_store(struct config_item *item, 119962ac0d32SChristoph Hellwig const char *page, size_t count) 120062ac0d32SChristoph Hellwig { 120162ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 120284b8d0d7SChaitanya Kulkarni enum nvme_ana_state *ana_state = grp->port->ana_state; 120362ac0d32SChristoph Hellwig int i; 120462ac0d32SChristoph Hellwig 120584b8d0d7SChaitanya Kulkarni for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) { 120684b8d0d7SChaitanya Kulkarni if (sysfs_streq(page, nvmet_ana_state[i].name)) 120762ac0d32SChristoph Hellwig goto found; 120862ac0d32SChristoph Hellwig } 120962ac0d32SChristoph Hellwig 121062ac0d32SChristoph Hellwig pr_err("Invalid value '%s' for ana_state\n", page); 121162ac0d32SChristoph Hellwig return -EINVAL; 121262ac0d32SChristoph Hellwig 121362ac0d32SChristoph Hellwig found: 121462ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 121584b8d0d7SChaitanya Kulkarni ana_state[grp->grpid] = (enum nvme_ana_state) nvmet_ana_state[i].type; 121662ac0d32SChristoph Hellwig nvmet_ana_chgcnt++; 121762ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 121862ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 121962ac0d32SChristoph Hellwig return count; 122062ac0d32SChristoph Hellwig } 122162ac0d32SChristoph Hellwig 122262ac0d32SChristoph Hellwig CONFIGFS_ATTR(nvmet_ana_group_, ana_state); 122362ac0d32SChristoph Hellwig 122462ac0d32SChristoph Hellwig static struct configfs_attribute *nvmet_ana_group_attrs[] = { 122562ac0d32SChristoph Hellwig &nvmet_ana_group_attr_ana_state, 122662ac0d32SChristoph Hellwig NULL, 122762ac0d32SChristoph Hellwig }; 122862ac0d32SChristoph Hellwig 122962ac0d32SChristoph Hellwig static void nvmet_ana_group_release(struct config_item *item) 123062ac0d32SChristoph Hellwig { 123162ac0d32SChristoph Hellwig struct nvmet_ana_group *grp = to_ana_group(item); 123262ac0d32SChristoph Hellwig 123362ac0d32SChristoph Hellwig if (grp == &grp->port->ana_default_group) 123462ac0d32SChristoph Hellwig return; 123562ac0d32SChristoph Hellwig 123662ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 123762ac0d32SChristoph Hellwig grp->port->ana_state[grp->grpid] = NVME_ANA_INACCESSIBLE; 123862ac0d32SChristoph Hellwig nvmet_ana_group_enabled[grp->grpid]--; 123962ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 124062ac0d32SChristoph Hellwig 124162ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 124262ac0d32SChristoph Hellwig kfree(grp); 124362ac0d32SChristoph Hellwig } 124462ac0d32SChristoph Hellwig 124562ac0d32SChristoph Hellwig static struct configfs_item_operations nvmet_ana_group_item_ops = { 124662ac0d32SChristoph Hellwig .release = nvmet_ana_group_release, 124762ac0d32SChristoph Hellwig }; 124862ac0d32SChristoph Hellwig 124962ac0d32SChristoph Hellwig static const struct config_item_type nvmet_ana_group_type = { 125062ac0d32SChristoph Hellwig .ct_item_ops = &nvmet_ana_group_item_ops, 125162ac0d32SChristoph Hellwig .ct_attrs = nvmet_ana_group_attrs, 125262ac0d32SChristoph Hellwig .ct_owner = THIS_MODULE, 125362ac0d32SChristoph Hellwig }; 125462ac0d32SChristoph Hellwig 125562ac0d32SChristoph Hellwig static struct config_group *nvmet_ana_groups_make_group( 125662ac0d32SChristoph Hellwig struct config_group *group, const char *name) 125762ac0d32SChristoph Hellwig { 125862ac0d32SChristoph Hellwig struct nvmet_port *port = ana_groups_to_port(&group->cg_item); 125962ac0d32SChristoph Hellwig struct nvmet_ana_group *grp; 126062ac0d32SChristoph Hellwig u32 grpid; 126162ac0d32SChristoph Hellwig int ret; 126262ac0d32SChristoph Hellwig 126362ac0d32SChristoph Hellwig ret = kstrtou32(name, 0, &grpid); 126462ac0d32SChristoph Hellwig if (ret) 126562ac0d32SChristoph Hellwig goto out; 126662ac0d32SChristoph Hellwig 126762ac0d32SChristoph Hellwig ret = -EINVAL; 126862ac0d32SChristoph Hellwig if (grpid <= 1 || grpid > NVMET_MAX_ANAGRPS) 126962ac0d32SChristoph Hellwig goto out; 127062ac0d32SChristoph Hellwig 127162ac0d32SChristoph Hellwig ret = -ENOMEM; 127262ac0d32SChristoph Hellwig grp = kzalloc(sizeof(*grp), GFP_KERNEL); 127362ac0d32SChristoph Hellwig if (!grp) 127462ac0d32SChristoph Hellwig goto out; 127562ac0d32SChristoph Hellwig grp->port = port; 127662ac0d32SChristoph Hellwig grp->grpid = grpid; 127762ac0d32SChristoph Hellwig 127862ac0d32SChristoph Hellwig down_write(&nvmet_ana_sem); 127962ac0d32SChristoph Hellwig nvmet_ana_group_enabled[grpid]++; 128062ac0d32SChristoph Hellwig up_write(&nvmet_ana_sem); 128162ac0d32SChristoph Hellwig 128262ac0d32SChristoph Hellwig nvmet_port_send_ana_event(grp->port); 128362ac0d32SChristoph Hellwig 128462ac0d32SChristoph Hellwig config_group_init_type_name(&grp->group, name, &nvmet_ana_group_type); 128562ac0d32SChristoph Hellwig return &grp->group; 128662ac0d32SChristoph Hellwig out: 128762ac0d32SChristoph Hellwig return ERR_PTR(ret); 128862ac0d32SChristoph Hellwig } 128962ac0d32SChristoph Hellwig 129062ac0d32SChristoph Hellwig static struct configfs_group_operations nvmet_ana_groups_group_ops = { 129162ac0d32SChristoph Hellwig .make_group = nvmet_ana_groups_make_group, 129262ac0d32SChristoph Hellwig }; 129362ac0d32SChristoph Hellwig 129462ac0d32SChristoph Hellwig static const struct config_item_type nvmet_ana_groups_type = { 129562ac0d32SChristoph Hellwig .ct_group_ops = &nvmet_ana_groups_group_ops, 129662ac0d32SChristoph Hellwig .ct_owner = THIS_MODULE, 129762ac0d32SChristoph Hellwig }; 129862ac0d32SChristoph Hellwig 1299a07b4970SChristoph Hellwig /* 1300a07b4970SChristoph Hellwig * Ports definitions. 1301a07b4970SChristoph Hellwig */ 1302a07b4970SChristoph Hellwig static void nvmet_port_release(struct config_item *item) 1303a07b4970SChristoph Hellwig { 1304a07b4970SChristoph Hellwig struct nvmet_port *port = to_nvmet_port(item); 1305a07b4970SChristoph Hellwig 1306b662a078SJay Sternberg list_del(&port->global_entry); 1307b662a078SJay Sternberg 130872efd25dSChristoph Hellwig kfree(port->ana_state); 1309a07b4970SChristoph Hellwig kfree(port); 1310a07b4970SChristoph Hellwig } 1311a07b4970SChristoph Hellwig 1312a07b4970SChristoph Hellwig static struct configfs_attribute *nvmet_port_attrs[] = { 1313a07b4970SChristoph Hellwig &nvmet_attr_addr_adrfam, 1314a07b4970SChristoph Hellwig &nvmet_attr_addr_treq, 1315a07b4970SChristoph Hellwig &nvmet_attr_addr_traddr, 1316a07b4970SChristoph Hellwig &nvmet_attr_addr_trsvcid, 1317a07b4970SChristoph Hellwig &nvmet_attr_addr_trtype, 13180d5ee2b2SSteve Wise &nvmet_attr_param_inline_data_size, 1319a07b4970SChristoph Hellwig NULL, 1320a07b4970SChristoph Hellwig }; 1321a07b4970SChristoph Hellwig 1322a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_port_item_ops = { 1323a07b4970SChristoph Hellwig .release = nvmet_port_release, 1324a07b4970SChristoph Hellwig }; 1325a07b4970SChristoph Hellwig 132666603a31SBhumika Goyal static const struct config_item_type nvmet_port_type = { 1327a07b4970SChristoph Hellwig .ct_attrs = nvmet_port_attrs, 1328a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_port_item_ops, 1329a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1330a07b4970SChristoph Hellwig }; 1331a07b4970SChristoph Hellwig 1332a07b4970SChristoph Hellwig static struct config_group *nvmet_ports_make(struct config_group *group, 1333a07b4970SChristoph Hellwig const char *name) 1334a07b4970SChristoph Hellwig { 1335a07b4970SChristoph Hellwig struct nvmet_port *port; 1336a07b4970SChristoph Hellwig u16 portid; 133762ac0d32SChristoph Hellwig u32 i; 1338a07b4970SChristoph Hellwig 1339a07b4970SChristoph Hellwig if (kstrtou16(name, 0, &portid)) 1340a07b4970SChristoph Hellwig return ERR_PTR(-EINVAL); 1341a07b4970SChristoph Hellwig 1342a07b4970SChristoph Hellwig port = kzalloc(sizeof(*port), GFP_KERNEL); 1343a07b4970SChristoph Hellwig if (!port) 1344f98d9ca1SDan Carpenter return ERR_PTR(-ENOMEM); 1345a07b4970SChristoph Hellwig 134672efd25dSChristoph Hellwig port->ana_state = kcalloc(NVMET_MAX_ANAGRPS + 1, 134772efd25dSChristoph Hellwig sizeof(*port->ana_state), GFP_KERNEL); 134872efd25dSChristoph Hellwig if (!port->ana_state) { 134972efd25dSChristoph Hellwig kfree(port); 135072efd25dSChristoph Hellwig return ERR_PTR(-ENOMEM); 135172efd25dSChristoph Hellwig } 135272efd25dSChristoph Hellwig 135362ac0d32SChristoph Hellwig for (i = 1; i <= NVMET_MAX_ANAGRPS; i++) { 135462ac0d32SChristoph Hellwig if (i == NVMET_DEFAULT_ANA_GRPID) 135562ac0d32SChristoph Hellwig port->ana_state[1] = NVME_ANA_OPTIMIZED; 135662ac0d32SChristoph Hellwig else 135762ac0d32SChristoph Hellwig port->ana_state[i] = NVME_ANA_INACCESSIBLE; 135862ac0d32SChristoph Hellwig } 135972efd25dSChristoph Hellwig 1360b662a078SJay Sternberg list_add(&port->global_entry, &nvmet_ports_list); 1361b662a078SJay Sternberg 1362a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->entry); 1363a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->subsystems); 1364a07b4970SChristoph Hellwig INIT_LIST_HEAD(&port->referrals); 13650d5ee2b2SSteve Wise port->inline_data_size = -1; /* < 0 == let the transport choose */ 1366a07b4970SChristoph Hellwig 1367a07b4970SChristoph Hellwig port->disc_addr.portid = cpu_to_le16(portid); 1368d02abd19SChaitanya Kulkarni port->disc_addr.adrfam = NVMF_ADDR_FAMILY_MAX; 13699b95d2fbSSagi Grimberg port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW; 1370a07b4970SChristoph Hellwig config_group_init_type_name(&port->group, name, &nvmet_port_type); 1371a07b4970SChristoph Hellwig 1372a07b4970SChristoph Hellwig config_group_init_type_name(&port->subsys_group, 1373a07b4970SChristoph Hellwig "subsystems", &nvmet_port_subsys_type); 1374a07b4970SChristoph Hellwig configfs_add_default_group(&port->subsys_group, &port->group); 1375a07b4970SChristoph Hellwig 1376a07b4970SChristoph Hellwig config_group_init_type_name(&port->referrals_group, 1377a07b4970SChristoph Hellwig "referrals", &nvmet_referrals_type); 1378a07b4970SChristoph Hellwig configfs_add_default_group(&port->referrals_group, &port->group); 1379a07b4970SChristoph Hellwig 138062ac0d32SChristoph Hellwig config_group_init_type_name(&port->ana_groups_group, 138162ac0d32SChristoph Hellwig "ana_groups", &nvmet_ana_groups_type); 138262ac0d32SChristoph Hellwig configfs_add_default_group(&port->ana_groups_group, &port->group); 138362ac0d32SChristoph Hellwig 138462ac0d32SChristoph Hellwig port->ana_default_group.port = port; 138562ac0d32SChristoph Hellwig port->ana_default_group.grpid = NVMET_DEFAULT_ANA_GRPID; 138662ac0d32SChristoph Hellwig config_group_init_type_name(&port->ana_default_group.group, 138762ac0d32SChristoph Hellwig __stringify(NVMET_DEFAULT_ANA_GRPID), 138862ac0d32SChristoph Hellwig &nvmet_ana_group_type); 138962ac0d32SChristoph Hellwig configfs_add_default_group(&port->ana_default_group.group, 139062ac0d32SChristoph Hellwig &port->ana_groups_group); 139162ac0d32SChristoph Hellwig 1392a07b4970SChristoph Hellwig return &port->group; 1393a07b4970SChristoph Hellwig } 1394a07b4970SChristoph Hellwig 1395a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_ports_group_ops = { 1396a07b4970SChristoph Hellwig .make_group = nvmet_ports_make, 1397a07b4970SChristoph Hellwig }; 1398a07b4970SChristoph Hellwig 139966603a31SBhumika Goyal static const struct config_item_type nvmet_ports_type = { 1400a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_ports_group_ops, 1401a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1402a07b4970SChristoph Hellwig }; 1403a07b4970SChristoph Hellwig 1404a07b4970SChristoph Hellwig static struct config_group nvmet_subsystems_group; 1405a07b4970SChristoph Hellwig static struct config_group nvmet_ports_group; 1406a07b4970SChristoph Hellwig 1407a07b4970SChristoph Hellwig static void nvmet_host_release(struct config_item *item) 1408a07b4970SChristoph Hellwig { 1409a07b4970SChristoph Hellwig struct nvmet_host *host = to_host(item); 1410a07b4970SChristoph Hellwig 1411a07b4970SChristoph Hellwig kfree(host); 1412a07b4970SChristoph Hellwig } 1413a07b4970SChristoph Hellwig 1414a07b4970SChristoph Hellwig static struct configfs_item_operations nvmet_host_item_ops = { 1415a07b4970SChristoph Hellwig .release = nvmet_host_release, 1416a07b4970SChristoph Hellwig }; 1417a07b4970SChristoph Hellwig 141866603a31SBhumika Goyal static const struct config_item_type nvmet_host_type = { 1419a07b4970SChristoph Hellwig .ct_item_ops = &nvmet_host_item_ops, 1420a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1421a07b4970SChristoph Hellwig }; 1422a07b4970SChristoph Hellwig 1423a07b4970SChristoph Hellwig static struct config_group *nvmet_hosts_make_group(struct config_group *group, 1424a07b4970SChristoph Hellwig const char *name) 1425a07b4970SChristoph Hellwig { 1426a07b4970SChristoph Hellwig struct nvmet_host *host; 1427a07b4970SChristoph Hellwig 1428a07b4970SChristoph Hellwig host = kzalloc(sizeof(*host), GFP_KERNEL); 1429a07b4970SChristoph Hellwig if (!host) 1430a07b4970SChristoph Hellwig return ERR_PTR(-ENOMEM); 1431a07b4970SChristoph Hellwig 1432a07b4970SChristoph Hellwig config_group_init_type_name(&host->group, name, &nvmet_host_type); 1433a07b4970SChristoph Hellwig 1434a07b4970SChristoph Hellwig return &host->group; 1435a07b4970SChristoph Hellwig } 1436a07b4970SChristoph Hellwig 1437a07b4970SChristoph Hellwig static struct configfs_group_operations nvmet_hosts_group_ops = { 1438a07b4970SChristoph Hellwig .make_group = nvmet_hosts_make_group, 1439a07b4970SChristoph Hellwig }; 1440a07b4970SChristoph Hellwig 144166603a31SBhumika Goyal static const struct config_item_type nvmet_hosts_type = { 1442a07b4970SChristoph Hellwig .ct_group_ops = &nvmet_hosts_group_ops, 1443a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1444a07b4970SChristoph Hellwig }; 1445a07b4970SChristoph Hellwig 1446a07b4970SChristoph Hellwig static struct config_group nvmet_hosts_group; 1447a07b4970SChristoph Hellwig 144866603a31SBhumika Goyal static const struct config_item_type nvmet_root_type = { 1449a07b4970SChristoph Hellwig .ct_owner = THIS_MODULE, 1450a07b4970SChristoph Hellwig }; 1451a07b4970SChristoph Hellwig 1452a07b4970SChristoph Hellwig static struct configfs_subsystem nvmet_configfs_subsystem = { 1453a07b4970SChristoph Hellwig .su_group = { 1454a07b4970SChristoph Hellwig .cg_item = { 1455a07b4970SChristoph Hellwig .ci_namebuf = "nvmet", 1456a07b4970SChristoph Hellwig .ci_type = &nvmet_root_type, 1457a07b4970SChristoph Hellwig }, 1458a07b4970SChristoph Hellwig }, 1459a07b4970SChristoph Hellwig }; 1460a07b4970SChristoph Hellwig 1461a07b4970SChristoph Hellwig int __init nvmet_init_configfs(void) 1462a07b4970SChristoph Hellwig { 1463a07b4970SChristoph Hellwig int ret; 1464a07b4970SChristoph Hellwig 1465a07b4970SChristoph Hellwig config_group_init(&nvmet_configfs_subsystem.su_group); 1466a07b4970SChristoph Hellwig mutex_init(&nvmet_configfs_subsystem.su_mutex); 1467a07b4970SChristoph Hellwig 1468a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_subsystems_group, 1469a07b4970SChristoph Hellwig "subsystems", &nvmet_subsystems_type); 1470a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_subsystems_group, 1471a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1472a07b4970SChristoph Hellwig 1473a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_ports_group, 1474a07b4970SChristoph Hellwig "ports", &nvmet_ports_type); 1475a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_ports_group, 1476a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1477a07b4970SChristoph Hellwig 1478a07b4970SChristoph Hellwig config_group_init_type_name(&nvmet_hosts_group, 1479a07b4970SChristoph Hellwig "hosts", &nvmet_hosts_type); 1480a07b4970SChristoph Hellwig configfs_add_default_group(&nvmet_hosts_group, 1481a07b4970SChristoph Hellwig &nvmet_configfs_subsystem.su_group); 1482a07b4970SChristoph Hellwig 1483a07b4970SChristoph Hellwig ret = configfs_register_subsystem(&nvmet_configfs_subsystem); 1484a07b4970SChristoph Hellwig if (ret) { 1485a07b4970SChristoph Hellwig pr_err("configfs_register_subsystem: %d\n", ret); 1486a07b4970SChristoph Hellwig return ret; 1487a07b4970SChristoph Hellwig } 1488a07b4970SChristoph Hellwig 1489a07b4970SChristoph Hellwig return 0; 1490a07b4970SChristoph Hellwig } 1491a07b4970SChristoph Hellwig 1492a07b4970SChristoph Hellwig void __exit nvmet_exit_configfs(void) 1493a07b4970SChristoph Hellwig { 1494a07b4970SChristoph Hellwig configfs_unregister_subsystem(&nvmet_configfs_subsystem); 1495a07b4970SChristoph Hellwig } 1496