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/*-
* 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
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* 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
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "spdk/stdinc.h"
#include "spdk/event.h"
#include "spdk/nvme.h"
#include "spdk/string.h"
#include "spdk/thread.h"
static char g_path[256];
static struct spdk_poller *g_poller;
struct ctrlr_entry {
struct spdk_nvme_ctrlr *ctrlr;
struct ctrlr_entry *next;
};
static struct ctrlr_entry *g_controllers = NULL;
static void
cleanup(void)
{
struct ctrlr_entry *ctrlr_entry = g_controllers;
while (ctrlr_entry) {
struct ctrlr_entry *next = ctrlr_entry->next;
spdk_nvme_detach(ctrlr_entry->ctrlr);
free(ctrlr_entry);
ctrlr_entry = next;
}
}
static void
usage(char *executable_name)
{
printf("%s [options]\n", executable_name);
printf("options:\n");
printf(" -i shared memory ID [required]\n");
printf(" -m mask core mask for DPDK\n");
printf(" -n channel number of memory channels used for DPDK\n");
printf(" -p core master (primary) core for DPDK\n");
printf(" -s size memory size in MB for DPDK\n");
printf(" -H show this usage\n");
}
static bool
probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
struct spdk_nvme_ctrlr_opts *opts)
{
/*
* Set the io_queue_size to UINT16_MAX to initialize
* the controller with the possible largest queue size.
*/
opts->io_queue_size = UINT16_MAX;
return true;
}
static void
attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
{
struct ctrlr_entry *entry;
entry = malloc(sizeof(struct ctrlr_entry));
if (entry == NULL) {
fprintf(stderr, "Malloc error\n");
exit(1);
}
entry->ctrlr = ctrlr;
entry->next = g_controllers;
g_controllers = entry;
}
static int
stub_sleep(void *arg)
{
usleep(1000 * 1000);
return 0;
}
static void
stub_start(void *arg1)
{
int shm_id = (intptr_t)arg1;
spdk_unaffinitize_thread();
if (spdk_nvme_probe(NULL, NULL, probe_cb, attach_cb, NULL) != 0) {
fprintf(stderr, "spdk_nvme_probe() failed\n");
exit(1);
}
snprintf(g_path, sizeof(g_path), "/var/run/spdk_stub%d", shm_id);
if (mknod(g_path, S_IFREG, 0) != 0) {
fprintf(stderr, "could not create sentinel file %s\n", g_path);
exit(1);
}
g_poller = SPDK_POLLER_REGISTER(stub_sleep, NULL, 0);
}
static void
stub_shutdown(void)
{
spdk_poller_unregister(&g_poller);
unlink(g_path);
spdk_app_stop(0);
}
int
main(int argc, char **argv)
{
int ch;
struct spdk_app_opts opts = {};
long int val;
/* default value in opts structure */
spdk_app_opts_init(&opts);
opts.name = "stub";
opts.rpc_addr = NULL;
while ((ch = getopt(argc, argv, "i:m:n:p:s:H")) != -1) {
if (ch == 'm') {
opts.reactor_mask = optarg;
} else if (ch == '?') {
usage(argv[0]);
exit(1);
} else {
val = spdk_strtol(optarg, 10);
if (val < 0) {
fprintf(stderr, "Converting a string to integer failed\n");
exit(1);
}
switch (ch) {
case 'i':
opts.shm_id = val;
break;
case 'n':
opts.mem_channel = val;
break;
case 'p':
opts.master_core = val;
break;
case 's':
opts.mem_size = val;
break;
case 'H':
default:
usage(argv[0]);
exit(EXIT_SUCCESS);
}
}
}
if (opts.shm_id < 0) {
fprintf(stderr, "%s: -i shared memory ID must be specified\n", argv[0]);
usage(argv[0]);
exit(1);
}
opts.shutdown_cb = stub_shutdown;
ch = spdk_app_start(&opts, stub_start, (void *)(intptr_t)opts.shm_id);
cleanup();
spdk_app_fini();
return ch;
}
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