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systemd/extras/ata_id/ata_id.c
David Zeuthen 7f4954d040 Export ID_WWN_VENDOR_EXTENSION and ID_WWN_WITH_EXTENSION 
Some SCSI devices use the same WWN and have a WWN extension that we
need to take into account when creating the /dev/disk/by-id/wwn
symlinks. Thus, introduce ID_WWN_WITH_EXTENSION. This property will
contain either the WWN (if no extension is present) or the WWN with
the vendor extension appended.

Example:

 # /lib/udev/ata_id/ata_id --export /dev/sda |grep WWN
 ID_WWN=0x5001517387d61905
 ID_WWN_WITH_EXTENSION=0x5001517387d61905

 # /lib/udev/scsi_id --whitelisted --export -d /dev/sdb |grep WWN
 ID_WWN=0x600508b400105df7
 ID_WWN_VENDOR_EXTENSION=0x0000e00000d80000
 ID_WWN_WITH_EXTENSION=0x600508b400105df70000e00000d80000

 # /lib/udev/scsi_id --whitelisted --export -d /dev/sdc |grep WWN
 ID_WWN=0x600508b400105df7
 ID_WWN_VENDOR_EXTENSION=0x0000e00000db0000
 ID_WWN_WITH_EXTENSION=0x600508b400105df70000e00000db0000

Signed-off-by: David Zeuthen <davidz@redhat.com>
2009-12-04 11:40:00 -05:00

540 lines
15 KiB
C
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* ata_id - reads product/serial number from ATA drives
*
* Copyright (C) 2005-2008 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2009 Lennart Poettering <lennart@poettering.net>
* Copyright (C) 2009 David Zeuthen <zeuthen@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <scsi/scsi_ioctl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/types.h>
#include <linux/hdreg.h>
#include <linux/fs.h>
#include <linux/cdrom.h>
#include <arpa/inet.h>
#include "libudev.h"
#include "libudev-private.h"
#define COMMAND_TIMEOUT 2000
/* Sends a SCSI command block */
static int sg_io(int fd, int direction,
const void *cdb, size_t cdb_len,
void *data, size_t data_len,
void *sense, size_t sense_len)
{
struct sg_io_hdr io_hdr;
memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmdp = (unsigned char*) cdb;
io_hdr.cmd_len = cdb_len;
io_hdr.dxferp = data;
io_hdr.dxfer_len = data_len;
io_hdr.sbp = sense;
io_hdr.mx_sb_len = sense_len;
io_hdr.dxfer_direction = direction;
io_hdr.timeout = COMMAND_TIMEOUT;
return ioctl(fd, SG_IO, &io_hdr);
}
static int disk_command(int fd, int command, int direction, void *cmd_data,
void *data, size_t *len)
{
uint8_t *bytes = cmd_data;
uint8_t cdb[12];
uint8_t sense[32];
uint8_t *desc = sense+8;
int ret;
/*
* ATA Pass-Through 12 byte command, as described in "T10 04-262r8
* ATA Command Pass-Through":
* http://www.t10.org/ftp/t10/document.04/04-262r8.pdf
*/
memset(cdb, 0, sizeof(cdb));
cdb[0] = 0xa1; /* OPERATION CODE: 12 byte pass through */
if (direction == SG_DXFER_NONE) {
cdb[1] = 3 << 1; /* PROTOCOL: Non-Data */
cdb[2] = 0x20; /* OFF_LINE=0, CK_COND=1, T_DIR=0, BYT_BLOK=0, T_LENGTH=0 */
} else if (direction == SG_DXFER_FROM_DEV) {
cdb[1] = 4 << 1; /* PROTOCOL: PIO Data-in */
cdb[2] = 0x2e; /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
} else if (direction == SG_DXFER_TO_DEV) {
cdb[1] = 5 << 1; /* PROTOCOL: PIO Data-Out */
cdb[2] = 0x26; /* OFF_LINE=0, CK_COND=1, T_DIR=0, BYT_BLOK=1, T_LENGTH=2 */
}
cdb[3] = bytes[1]; /* FEATURES */
cdb[4] = bytes[3]; /* SECTORS */
cdb[5] = bytes[9]; /* LBA LOW */
cdb[6] = bytes[8]; /* LBA MID */
cdb[7] = bytes[7]; /* LBA HIGH */
cdb[8] = bytes[10] & 0x4F; /* SELECT */
cdb[9] = (uint8_t) command;
memset(sense, 0, sizeof(sense));
if ((ret = sg_io(fd, direction, cdb, sizeof(cdb), data, len ? *len : 0, sense, sizeof(sense))) < 0)
return ret;
if (sense[0] != 0x72 || desc[0] != 0x9 || desc[1] != 0x0c) {
errno = EIO;
return -1;
}
memset(bytes, 0, 12);
bytes[1] = desc[3]; /* FEATURES */
bytes[2] = desc[4]; /* STATUS */
bytes[3] = desc[5]; /* SECTORS */
bytes[9] = desc[7]; /* LBA LOW */
bytes[8] = desc[9]; /* LBA MID */
bytes[7] = desc[11]; /* LBA HIGH */
bytes[10] = desc[12]; /* SELECT */
bytes[11] = desc[13]; /* ERROR */
return ret;
}
/**
* disk_identify_get_string:
* @identify: A block of IDENTIFY data
* @offset_words: Offset of the string to get, in words.
* @dest: Destination buffer for the string.
* @dest_len: Length of destination buffer, in bytes.
*
* Copies the ATA string from @identify located at @offset_words into @dest.
*/
static void disk_identify_get_string (uint8_t identify[512],
unsigned int offset_words,
char *dest,
size_t dest_len)
{
unsigned int c1;
unsigned int c2;
assert (identify != NULL);
assert (dest != NULL);
assert ((dest_len & 1) == 0);
while (dest_len > 0) {
c1 = ((uint16_t *) identify)[offset_words] >> 8;
c2 = ((uint16_t *) identify)[offset_words] & 0xff;
*dest = c1;
dest++;
*dest = c2;
dest++;
offset_words++;
dest_len -= 2;
}
}
static void disk_identify_fixup_string (uint8_t identify[512],
unsigned int offset_words,
size_t len)
{
disk_identify_get_string(identify, offset_words,
(char *) identify + offset_words * 2, len);
}
static void disk_identify_fixup_uint16 (uint8_t identify[512], unsigned int offset_words)
{
uint16_t *p;
p = (uint16_t *) identify;
p[offset_words] = le16toh (p[offset_words]);
}
/**
* disk_identify:
* @udev: The libudev context.
* @fd: File descriptor for the block device.
* @out_identify: Return location for IDENTIFY data.
*
* Sends the IDENTIFY DEVICE command to the device represented by
* @fd. If successful, then the result will be copied into
* @out_identify.
*
* This routine is based on code from libatasmart, Copyright 2008
* Lennart Poettering, LGPL v2.1.
*
* Returns: 0 if the IDENTIFY data was successfully obtained,
* otherwise non-zero with errno set.
*/
static int disk_identify (struct udev *udev,
int fd,
uint8_t out_identify[512])
{
int ret;
uint64_t size;
struct stat st;
uint16_t cmd[6];
size_t len = 512;
const uint8_t *p;
assert (out_identify != NULL);
/* init results */
ret = -1;
memset (out_identify, '\0', 512);
if ((ret = fstat(fd, &st)) < 0)
goto fail;
if (!S_ISBLK(st.st_mode)) {
errno = ENODEV;
goto fail;
}
/*
* do not confuse optical drive firmware with ATA commands
* some drives are reported to blank CD-RWs
*/
if (ioctl(fd, CDROM_GET_CAPABILITY, NULL) >= 0) {
errno = EIO;
ret = -1;
goto fail;
}
/* So, it's a block device. Let's make sure the ioctls work */
if ((ret = ioctl(fd, BLKGETSIZE64, &size)) < 0)
goto fail;
if (size <= 0 || size == (uint64_t) -1) {
errno = EIO;
goto fail;
}
memset(cmd, 0, sizeof(cmd));
cmd[1] = htons(1);
ret = disk_command(fd,
0xEC, /* IDENTIFY DEVICE command */
SG_DXFER_FROM_DEV, cmd,
out_identify, &len);
if (ret != 0)
goto fail;
if (len != 512) {
errno = EIO;
goto fail;
}
/* Check if IDENTIFY data is all NULs */
for (p = out_identify; p < (const uint8_t*) out_identify + len; p++) {
if (*p) {
p = NULL;
break;
}
}
if (p) {
errno = EIO;
goto fail;
}
ret = 0;
fail:
return ret;
}
static void log_fn(struct udev *udev, int priority,
const char *file, int line, const char *fn,
const char *format, va_list args)
{
vsyslog(priority, format, args);
}
int main(int argc, char *argv[])
{
struct udev *udev;
struct hd_driveid id;
uint8_t identify[512];
char model[41];
char model_enc[256];
char serial[21];
char revision[9];
const char *node = NULL;
int export = 0;
int fd;
uint16_t word;
int rc = 0;
static const struct option options[] = {
{ "export", no_argument, NULL, 'x' },
{ "help", no_argument, NULL, 'h' },
{}
};
udev = udev_new();
if (udev == NULL)
goto exit;
udev_log_init("ata_id");
udev_set_log_fn(udev, log_fn);
while (1) {
int option;
option = getopt_long(argc, argv, "xh", options, NULL);
if (option == -1)
break;
switch (option) {
case 'x':
export = 1;
break;
case 'h':
printf("Usage: ata_id [--export] [--help] <device>\n"
" --export print values as environment keys\n"
" --help print this help text\n\n");
default:
rc = 1;
goto exit;
}
}
node = argv[optind];
if (node == NULL) {
err(udev, "no node specified\n");
rc = 1;
goto exit;
}
fd = open(node, O_RDONLY|O_NONBLOCK);
if (fd < 0) {
err(udev, "unable to open '%s'\n", node);
rc = 1;
goto exit;
}
if (disk_identify(udev, fd, identify) == 0) {
/*
* fix up only the fields from the IDENTIFY data that we are going to
* use and copy it into the hd_driveid struct for convenience
*/
disk_identify_fixup_string (identify, 10, 20); /* serial */
disk_identify_fixup_string (identify, 23, 6); /* fwrev */
disk_identify_fixup_string (identify, 27, 40); /* model */
disk_identify_fixup_uint16 (identify, 0); /* configuration */
disk_identify_fixup_uint16 (identify, 75); /* queue depth */
disk_identify_fixup_uint16 (identify, 75); /* SATA capabilities */
disk_identify_fixup_uint16 (identify, 82); /* command set supported */
disk_identify_fixup_uint16 (identify, 83); /* command set supported */
disk_identify_fixup_uint16 (identify, 84); /* command set supported */
disk_identify_fixup_uint16 (identify, 85); /* command set supported */
disk_identify_fixup_uint16 (identify, 86); /* command set supported */
disk_identify_fixup_uint16 (identify, 87); /* command set supported */
disk_identify_fixup_uint16 (identify, 89); /* time required for SECURITY ERASE UNIT */
disk_identify_fixup_uint16 (identify, 90); /* time required for enhanced SECURITY ERASE UNIT */
disk_identify_fixup_uint16 (identify, 91); /* current APM values */
disk_identify_fixup_uint16 (identify, 94); /* current AAM value */
disk_identify_fixup_uint16 (identify, 128); /* device lock function */
disk_identify_fixup_uint16 (identify, 217); /* nominal media rotation rate */
memcpy(&id, identify, sizeof id);
} else {
/* If this fails, then try HDIO_GET_IDENTITY */
if (ioctl(fd, HDIO_GET_IDENTITY, &id) != 0) {
if (errno == ENOTTY) {
info(udev, "HDIO_GET_IDENTITY unsupported for '%s'\n", node);
rc = 2;
} else {
err(udev, "HDIO_GET_IDENTITY failed for '%s'\n", node);
rc = 3;
}
goto close;
}
}
memcpy (model, id.model, 40);
model[40] = '\0';
udev_util_encode_string(model, model_enc, sizeof(model_enc));
udev_util_replace_whitespace((char *) id.model, model, 40);
udev_util_replace_chars(model, NULL);
udev_util_replace_whitespace((char *) id.serial_no, serial, 20);
udev_util_replace_chars(serial, NULL);
udev_util_replace_whitespace((char *) id.fw_rev, revision, 8);
udev_util_replace_chars(revision, NULL);
if (export) {
/* Set this to convey the disk speaks the ATA protocol */
printf("ID_ATA=1\n");
if ((id.config >> 8) & 0x80) {
/* This is an ATAPI device */
switch ((id.config >> 8) & 0x1f) {
case 0:
printf("ID_TYPE=cd\n");
break;
case 1:
printf("ID_TYPE=tape\n");
break;
case 5:
printf("ID_TYPE=cd\n");
break;
case 7:
printf("ID_TYPE=optical\n");
break;
default:
printf("ID_TYPE=generic\n");
break;
}
} else {
printf("ID_TYPE=disk\n");
}
printf("ID_BUS=ata\n");
printf("ID_MODEL=%s\n", model);
printf("ID_MODEL_ENC=%s\n", model_enc);
printf("ID_REVISION=%s\n", revision);
printf("ID_SERIAL=%s_%s\n", model, serial);
printf("ID_SERIAL_SHORT=%s\n", serial);
if (id.command_set_1 & (1<<5)) {
printf ("ID_ATA_WRITE_CACHE=1\n");
printf ("ID_ATA_WRITE_CACHE_ENABLED=%d\n", (id.cfs_enable_1 & (1<<5)) ? 1 : 0);
}
if (id.command_set_1 & (1<<10)) {
printf("ID_ATA_FEATURE_SET_HPA=1\n");
printf("ID_ATA_FEATURE_SET_HPA_ENABLED=%d\n", (id.cfs_enable_1 & (1<<10)) ? 1 : 0);
/*
* TODO: use the READ NATIVE MAX ADDRESS command to get the native max address
* so it is easy to check whether the protected area is in use.
*/
}
if (id.command_set_1 & (1<<3)) {
printf("ID_ATA_FEATURE_SET_PM=1\n");
printf("ID_ATA_FEATURE_SET_PM_ENABLED=%d\n", (id.cfs_enable_1 & (1<<3)) ? 1 : 0);
}
if (id.command_set_1 & (1<<1)) {
printf("ID_ATA_FEATURE_SET_SECURITY=1\n");
printf("ID_ATA_FEATURE_SET_SECURITY_ENABLED=%d\n", (id.cfs_enable_1 & (1<<1)) ? 1 : 0);
printf("ID_ATA_FEATURE_SET_SECURITY_ERASE_UNIT_MIN=%d\n", id.trseuc * 2);
if ((id.cfs_enable_1 & (1<<1))) /* enabled */ {
if (id.dlf & (1<<8))
printf("ID_ATA_FEATURE_SET_SECURITY_LEVEL=maximum\n");
else
printf("ID_ATA_FEATURE_SET_SECURITY_LEVEL=high\n");
}
if (id.dlf & (1<<5))
printf("ID_ATA_FEATURE_SET_SECURITY_ENHANCED_ERASE_UNIT_MIN=%d\n", id.trsEuc * 2);
if (id.dlf & (1<<4))
printf("ID_ATA_FEATURE_SET_SECURITY_EXPIRE=1\n");
if (id.dlf & (1<<3))
printf("ID_ATA_FEATURE_SET_SECURITY_FROZEN=1\n");
if (id.dlf & (1<<2))
printf("ID_ATA_FEATURE_SET_SECURITY_LOCKED=1\n");
}
if (id.command_set_1 & (1<<0)) {
printf("ID_ATA_FEATURE_SET_SMART=1\n");
printf("ID_ATA_FEATURE_SET_SMART_ENABLED=%d\n", (id.cfs_enable_1 & (1<<0)) ? 1 : 0);
}
if (id.command_set_2 & (1<<9)) {
printf("ID_ATA_FEATURE_SET_AAM=1\n");
printf("ID_ATA_FEATURE_SET_AAM_ENABLED=%d\n", (id.cfs_enable_2 & (1<<9)) ? 1 : 0);
printf("ID_ATA_FEATURE_SET_AAM_VENDOR_RECOMMENDED_VALUE=%d\n", id.acoustic >> 8);
printf("ID_ATA_FEATURE_SET_AAM_CURRENT_VALUE=%d\n", id.acoustic & 0xff);
}
if (id.command_set_2 & (1<<5)) {
printf("ID_ATA_FEATURE_SET_PUIS=1\n");
printf("ID_ATA_FEATURE_SET_PUIS_ENABLED=%d\n", (id.cfs_enable_2 & (1<<5)) ? 1 : 0);
}
if (id.command_set_2 & (1<<3)) {
printf("ID_ATA_FEATURE_SET_APM=1\n");
printf("ID_ATA_FEATURE_SET_APM_ENABLED=%d\n", (id.cfs_enable_2 & (1<<3)) ? 1 : 0);
if ((id.cfs_enable_2 & (1<<3)))
printf("ID_ATA_FEATURE_SET_APM_CURRENT_VALUE=%d\n", id.CurAPMvalues & 0xff);
}
if (id.command_set_2 & (1<<0))
printf("ID_ATA_DOWNLOAD_MICROCODE=1\n");
/*
* Word 76 indicates the capabilities of a SATA device. A PATA device shall set
* word 76 to 0000h or FFFFh. If word 76 is set to 0000h or FFFFh, then
* the device does not claim compliance with the Serial ATA specification and words
* 76 through 79 are not valid and shall be ignored.
*/
word = *((uint16_t *) identify + 76);
if (word != 0x0000 && word != 0xffff) {
printf("ID_ATA_SATA=1\n");
/*
* If bit 2 of word 76 is set to one, then the device supports the Gen2
* signaling rate of 3.0 Gb/s (see SATA 2.6).
*
* If bit 1 of word 76 is set to one, then the device supports the Gen1
* signaling rate of 1.5 Gb/s (see SATA 2.6).
*/
if (word & (1<<2))
printf("ID_ATA_SATA_SIGNAL_RATE_GEN2=1\n");
if (word & (1<<1))
printf("ID_ATA_SATA_SIGNAL_RATE_GEN1=1\n");
}
/* Word 217 indicates the nominal media rotation rate of the device */
word = *((uint16_t *) identify + 217);
if (word != 0x0000) {
if (word == 0x0001) {
printf ("ID_ATA_ROTATION_RATE_RPM=0\n"); /* non-rotating e.g. SSD */
} else if (word >= 0x0401 && word <= 0xfffe) {
printf ("ID_ATA_ROTATION_RATE_RPM=%d\n", word);
}
}
/*
* Words 108-111 contain a mandatory World Wide Name (WWN) in the NAA IEEE Registered identifier
* format. Word 108 bits (15:12) shall contain 5h, indicating that the naming authority is IEEE.
* All other values are reserved.
*/
word = *((uint16_t *) identify + 108);
if ((word & 0xf000) == 0x5000) {
uint64_t wwwn;
wwwn = *((uint16_t *) identify + 108);
wwwn <<= 16;
wwwn |= *((uint16_t *) identify + 109);
wwwn <<= 16;
wwwn |= *((uint16_t *) identify + 110);
wwwn <<= 16;
wwwn |= *((uint16_t *) identify + 111);
printf("ID_WWN=0x%llx\n", (unsigned long long int) wwwn);
/* ATA devices have no vendor extension */
printf("ID_WWN_WITH_EXTENSION=0x%llx\n", (unsigned long long int) wwwn);
}
} else {
if (serial[0] != '\0')
printf("%s_%s\n", model, serial);
else
printf("%s\n", model);
}
close:
close(fd);
exit:
udev_unref(udev);
udev_log_close();
return rc;
}
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