nvme/host/fabrics.c

3  * NVMe over Fabrics common host code.
27 	struct nvmf_host *host;
29 	host = kmalloc(sizeof(*host), GFP_KERNEL);
30 	if (!host)
33 	kref_init(&host->ref);
34 	uuid_copy(&host->id, id);
35 	strscpy(host->nqn, hostnqn, NVMF_NQN_SIZE);
37 	return host;
42 	struct nvmf_host *host;
47 	 * We have defined a host as how it is perceived by the target.
50 	 * different Host IDs. This'll maintain unambiguous host identification.
52 	list_for_each_entry(host, &nvmf_hosts, list) {
53 		bool same_hostnqn = !strcmp(host->nqn, hostnqn);
54 		bool same_hostid = uuid_equal(&host->id, id);
57 			kref_get(&host->ref);
63 			host = ERR_PTR(-EINVAL);
69 			host = ERR_PTR(-EINVAL);
74 	host = nvmf_host_alloc(hostnqn, id);
75 	if (!host) {
76 		host = ERR_PTR(-ENOMEM);
80 	list_add_tail(&host->list, &nvmf_hosts);
83 	return host;
88 	struct nvmf_host *host;
96 	host = nvmf_host_alloc(nqn, &id);
97 	if (!host)
101 	list_add_tail(&host->list, &nvmf_hosts);
104 	return host;
109 	struct nvmf_host *host = container_of(ref, struct nvmf_host, ref);
112 	list_del(&host->list);
115 	kfree(host);
118 static void nvmf_host_put(struct nvmf_host *host)
120 	if (host)
121 		kref_put(&host->ref, nvmf_host_destroy);
161  * Used by the host system to retrieve a 32-bit capsule property value
206  * Used by the host system to retrieve a 64-bit capsule property value
251  * Used by the NVMe host system to write a 32-bit capsule property value
365 			"Connect command failed: host path error\n");
388 	uuid_copy(&data->hostid, &ctrl->opts->host->id);
391 	strscpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE);
426  * This function enables an NVMe host device to request a new allocation of
429  * host system device and the allocated NVMe controller on the
496  *		host and target (note qid == 0 is illegal as this is
501  * between the host system device and the allocated NVMe controller
572  *   This error code is set on the host side.
728 	/* use default host if not given by user space */
857 			if (opts->host) {
859 				       opts->host->nqn);
1068 	opts->host = nvmf_host_add(hostnqn, &hostid);
1069 	if (IS_ERR(opts->host)) {
1070 		ret = PTR_ERR(opts->host);
1071 		opts->host = NULL;
1185 	 * Checking the local address or host interfaces is rough.
1187 	 * In most cases, none is specified and the host port or
1188 	 * host interface is selected by the stack.
1191 	 * -  local address or host interface is specified and address
1192 	 *    or host interface is not the same
1193 	 * -  local address or host interface is not specified but
1241 	nvmf_host_put(opts->host);
1511 MODULE_DESCRIPTION("NVMe host fabrics library");