numam-spdk/lib/nvmf/subsystem.c
Daniel Verkamp 89031c3e27 nvmf: move discovery subsystem creation to conf.c
It is not currently configurable, but this will allow us to make the
discovery subsystem have config options (e.g. which lcore to run on).

Change-Id: I788a64ba4462b023453191e509ce8de59fd90ae4
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
2016-07-22 12:50:01 -07:00

262 lines
7.2 KiB
C

/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
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* * Redistributions in binary form must reproduce the above copyright
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* the documentation and/or other materials provided with the
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* * Neither the name of Intel Corporation nor the names of its
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* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/
#include <ctype.h>
#include "nvmf_internal.h"
#include "session.h"
#include "subsystem.h"
#include "transport.h"
#include "spdk/log.h"
#include "spdk/string.h"
#include "spdk/trace.h"
#include "spdk/nvmf_spec.h"
static TAILQ_HEAD(, spdk_nvmf_subsystem) g_subsystems = TAILQ_HEAD_INITIALIZER(g_subsystems);
struct spdk_nvmf_subsystem *
nvmf_find_subsystem(const char *subnqn, const char *hostnqn)
{
struct spdk_nvmf_subsystem *subsystem;
struct spdk_nvmf_host *host;
if (!subnqn || !hostnqn) {
return NULL;
}
TAILQ_FOREACH(subsystem, &g_subsystems, entries) {
if (strcasecmp(subnqn, subsystem->subnqn) == 0) {
if (subsystem->num_hosts == 0) {
/* No hosts means any host can connect */
return subsystem;
}
TAILQ_FOREACH(host, &subsystem->hosts, link) {
if (strcasecmp(hostnqn, host->nqn) == 0) {
return subsystem;
}
}
}
}
return NULL;
}
static void
spdk_nvmf_subsystem_poller(void *arg)
{
struct spdk_nvmf_subsystem *subsystem = arg;
struct nvmf_session *session = subsystem->session;
if (!session) {
/* No active connections, so just return */
return;
}
/* For NVMe subsystems, check the backing physical device for completions. */
if (subsystem->subtype == SPDK_NVMF_SUBTYPE_NVME) {
spdk_nvme_ctrlr_process_admin_completions(subsystem->ctrlr);
spdk_nvme_qpair_process_completions(subsystem->io_qpair, 0);
}
/* For each connection in the session, check for RDMA completions */
spdk_nvmf_session_poll(session);
}
struct spdk_nvmf_subsystem *
nvmf_create_subsystem(int num, const char *name,
enum spdk_nvmf_subtype subtype,
uint32_t lcore)
{
struct spdk_nvmf_subsystem *subsystem;
subsystem = calloc(1, sizeof(struct spdk_nvmf_subsystem));
if (subsystem == NULL) {
return NULL;
}
SPDK_TRACELOG(SPDK_TRACE_NVMF, "nvmf_create_subsystem: allocated subsystem %p\n", subsystem);
subsystem->num = num;
subsystem->subtype = subtype;
snprintf(subsystem->subnqn, sizeof(subsystem->subnqn), "%s", name);
TAILQ_INIT(&subsystem->listen_addrs);
TAILQ_INIT(&subsystem->hosts);
subsystem->poller.fn = spdk_nvmf_subsystem_poller;
subsystem->poller.arg = subsystem;
spdk_poller_register(&subsystem->poller, lcore, NULL);
TAILQ_INSERT_HEAD(&g_subsystems, subsystem, entries);
return subsystem;
}
int
nvmf_delete_subsystem(struct spdk_nvmf_subsystem *subsystem)
{
struct spdk_nvmf_listen_addr *listen_addr, *listen_addr_tmp;
struct spdk_nvmf_host *host, *host_tmp;
if (subsystem == NULL) {
SPDK_TRACELOG(SPDK_TRACE_NVMF,
"nvmf_delete_subsystem: there is no subsystem\n");
return 0;
}
TAILQ_FOREACH_SAFE(listen_addr, &subsystem->listen_addrs, link, listen_addr_tmp) {
TAILQ_REMOVE(&subsystem->listen_addrs, listen_addr, link);
free(listen_addr->traddr);
free(listen_addr->trsvc);
free(listen_addr);
subsystem->num_listen_addrs--;
}
TAILQ_FOREACH_SAFE(host, &subsystem->hosts, link, host_tmp) {
TAILQ_REMOVE(&subsystem->hosts, host, link);
free(host->nqn);
free(host);
subsystem->num_hosts--;
}
if (subsystem->session) {
spdk_nvmf_session_destruct(subsystem->session);
}
if (subsystem->ctrlr) {
spdk_nvme_detach(subsystem->ctrlr);
}
TAILQ_REMOVE(&g_subsystems, subsystem, entries);
free(subsystem);
return 0;
}
int
spdk_nvmf_subsystem_add_listener(struct spdk_nvmf_subsystem *subsystem,
const struct spdk_nvmf_transport *transport,
char *traddr, char *trsvc)
{
struct spdk_nvmf_listen_addr *listen_addr;
listen_addr = calloc(1, sizeof(*listen_addr));
listen_addr->traddr = strdup(traddr);
listen_addr->trsvc = strdup(trsvc);
listen_addr->transport = transport;
TAILQ_INSERT_HEAD(&subsystem->listen_addrs, listen_addr, link);
subsystem->num_listen_addrs++;
return 0;
}
int
spdk_nvmf_subsystem_add_host(struct spdk_nvmf_subsystem *subsystem, char *host_nqn)
{
struct spdk_nvmf_host *host;
host = calloc(1, sizeof(*host));
host->nqn = strdup(host_nqn);
TAILQ_INSERT_HEAD(&subsystem->hosts, host, link);
subsystem->num_hosts++;
return 0;
}
int
nvmf_subsystem_add_ctrlr(struct spdk_nvmf_subsystem *subsystem,
struct spdk_nvme_ctrlr *ctrlr)
{
subsystem->ctrlr = ctrlr;
/* Assume that all I/O will be handled on one thread for now */
subsystem->io_qpair = spdk_nvme_ctrlr_alloc_io_qpair(ctrlr, 0);
if (subsystem->io_qpair == NULL) {
SPDK_ERRLOG("spdk_nvme_ctrlr_alloc_io_qpair() failed\n");
return -1;
}
return 0;
}
void
spdk_format_discovery_log(struct spdk_nvmf_discovery_log_page *disc_log, uint32_t length)
{
int numrec = 0;
struct spdk_nvmf_subsystem *subsystem;
struct spdk_nvmf_listen_addr *listen_addr;
struct spdk_nvmf_discovery_log_page_entry *entry;
TAILQ_FOREACH(subsystem, &g_subsystems, entries) {
if (subsystem->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY) {
continue;
}
TAILQ_FOREACH(listen_addr, &subsystem->listen_addrs, link) {
/* include the discovery log entry */
if (length > sizeof(struct spdk_nvmf_discovery_log_page)) {
if (sizeof(struct spdk_nvmf_discovery_log_page) + (numrec + 1) * sizeof(
struct spdk_nvmf_discovery_log_page_entry) > length) {
break;
}
entry = &disc_log->entries[numrec];
entry->portid = subsystem->num;
entry->cntlid = 0xffff;
entry->subtype = subsystem->subtype;
snprintf(entry->subnqn, sizeof(entry->subnqn), "%s", subsystem->subnqn);
listen_addr->transport->listen_addr_discover(listen_addr, entry);
}
numrec++;
}
}
disc_log->numrec = numrec;
}
int
spdk_shutdown_nvmf_subsystems(void)
{
struct spdk_nvmf_subsystem *subsystem;
while (!TAILQ_EMPTY(&g_subsystems)) {
subsystem = TAILQ_FIRST(&g_subsystems);
TAILQ_REMOVE(&g_subsystems, subsystem, entries);
nvmf_delete_subsystem(subsystem);
}
return 0;
}