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/*-
* Copyright (c) 2017 Netflix, Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/ioccom.h>
#include <sys/endian.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "nvmecontrol.h"
#define WDC_NVME_TOC_SIZE 8
#define WDC_NVME_CAP_DIAG_OPCODE 0xe6
#define WDC_NVME_CAP_DIAG_CMD 0x0000
static void wdc_cap_diag(int argc, char *argv[]);
#define WDC_CAP_DIAG_USAGE "\tnvmecontrol wdc cap-diag [-o path-template]\n"
static struct nvme_function wdc_funcs[] = {
{"cap-diag", wdc_cap_diag, WDC_CAP_DIAG_USAGE},
{NULL, NULL, NULL},
};
static void
wdc_append_serial_name(int fd, char *buf, size_t len, const char *suffix)
{
struct nvme_controller_data cdata;
char sn[NVME_SERIAL_NUMBER_LENGTH + 1];
char *walker;
len -= strlen(buf);
buf += strlen(buf);
read_controller_data(fd, &cdata);
memcpy(sn, cdata.sn, NVME_SERIAL_NUMBER_LENGTH);
walker = sn + NVME_SERIAL_NUMBER_LENGTH - 1;
while (walker > sn && *walker == ' ')
walker--;
*++walker = '\0';
snprintf(buf, len, "%s%s.bin", sn, suffix);
}
static void
wdc_get_data(int fd, uint32_t opcode, uint32_t len, uint32_t off, uint32_t cmd,
uint8_t *buffer, size_t buflen)
{
struct nvme_pt_command pt;
memset(&pt, 0, sizeof(pt));
pt.cmd.opc = opcode;
pt.cmd.cdw10 = htole32(len / sizeof(uint32_t)); /* - 1 like all the others ??? */
pt.cmd.cdw11 = htole32(off / sizeof(uint32_t));
pt.cmd.cdw12 = htole32(cmd);
pt.buf = buffer;
pt.len = buflen;
pt.is_read = 1;
// printf("opcode %#x cdw10(len) %#x cdw11(offset?) %#x cdw12(cmd/sub) %#x buflen %zd\n",
// (int)opcode, (int)cdw10, (int)cdw11, (int)cdw12, buflen);
if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
err(1, "wdc_get_data request failed");
if (nvme_completion_is_error(&pt.cpl))
errx(1, "wdc_get_data request returned error");
}
static void
wdc_do_dump(int fd, char *tmpl, const char *suffix, uint32_t opcode,
uint32_t cmd, int len_off)
{
int first;
int fd2;
uint8_t *buf;
uint32_t len, offset;
size_t resid;
wdc_append_serial_name(fd, tmpl, MAXPATHLEN, suffix);
/* XXX overwrite protection? */
fd2 = open(tmpl, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd2 < 0)
err(1, "open %s", tmpl);
buf = aligned_alloc(PAGE_SIZE, NVME_MAX_XFER_SIZE);
if (buf == NULL)
errx(1, "Can't get buffer to read dump");
offset = 0;
len = NVME_MAX_XFER_SIZE;
first = 1;
do {
resid = len > NVME_MAX_XFER_SIZE ? NVME_MAX_XFER_SIZE : len;
wdc_get_data(fd, opcode, resid, offset, cmd, buf, resid);
if (first) {
len = be32dec(buf + len_off);
if (len == 0)
errx(1, "No data for %s", suffix);
if (memcmp("E6LG", buf, 4) != 0)
printf("Expected header of E6LG, found '%4.4s' instead\n",
buf);
printf("Dumping %d bytes of version %d.%d log to %s\n", len,
buf[8], buf[9], tmpl);
/*
* Adjust amount to dump if total dump < 1MB,
* though it likely doesn't matter to the WDC
* analysis tools.
*/
if (resid > len)
resid = len;
first = 0;
}
if (write(fd2, buf, resid) != (ssize_t)resid)
err(1, "write");
offset += resid;
len -= resid;
} while (len > 0);
free(buf);
close(fd2);
}
static void
wdc_cap_diag_usage(void)
{
fprintf(stderr, "usage:\n");
fprintf(stderr, WDC_CAP_DIAG_USAGE);
exit(1);
}
static void
wdc_cap_diag(int argc, char *argv[])
{
char path_tmpl[MAXPATHLEN];
int ch, fd;
path_tmpl[0] = '\0';
while ((ch = getopt(argc, argv, "o:")) != -1) {
switch ((char)ch) {
case 'o':
strlcpy(path_tmpl, optarg, MAXPATHLEN);
break;
default:
wdc_cap_diag_usage();
}
}
/* Check that a controller was specified. */
if (optind >= argc)
wdc_cap_diag_usage();
open_dev(argv[optind], &fd, 1, 1);
wdc_do_dump(fd, path_tmpl, "cap_diag", WDC_NVME_CAP_DIAG_OPCODE,
WDC_NVME_CAP_DIAG_CMD, 4);
close(fd);
exit(1);
}
void
wdc(int argc, char *argv[])
{
dispatch(argc, argv, wdc_funcs);
}
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