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[thirdparty/systemd.git] / src / udev / ata_id / ata_id.c
1 /*
2 * ata_id - reads product/serial number from ATA drives
3 *
4 * Copyright (C) 2005-2008 Kay Sievers <kay@vrfy.org>
5 * Copyright (C) 2009 Lennart Poettering <lennart@poettering.net>
6 * Copyright (C) 2009-2010 David Zeuthen <zeuthen@gmail.com>
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <stdint.h>
25 #include <unistd.h>
26 #include <fcntl.h>
27 #include <ctype.h>
28 #include <string.h>
29 #include <errno.h>
30 #include <getopt.h>
31 #include <scsi/scsi.h>
32 #include <scsi/sg.h>
33 #include <scsi/scsi_ioctl.h>
34 #include <sys/ioctl.h>
35 #include <sys/types.h>
36 #include <sys/stat.h>
37 #include <linux/types.h>
38 #include <linux/hdreg.h>
39 #include <linux/fs.h>
40 #include <linux/cdrom.h>
41 #include <linux/bsg.h>
42 #include <arpa/inet.h>
43
44 #include "libudev.h"
45 #include "libudev-private.h"
46 #include "log.h"
47
48 #define COMMAND_TIMEOUT_MSEC (30 * 1000)
49
50 static int disk_scsi_inquiry_command(int fd,
51 void *buf,
52 size_t buf_len)
53 {
54 uint8_t cdb[6] = {
55 /*
56 * INQUIRY, see SPC-4 section 6.4
57 */
58 [0] = 0x12, /* OPERATION CODE: INQUIRY */
59 [3] = (buf_len >> 8), /* ALLOCATION LENGTH */
60 [4] = (buf_len & 0xff),
61 };
62 uint8_t sense[32] = {};
63 struct sg_io_v4 io_v4 = {
64 .guard = 'Q',
65 .protocol = BSG_PROTOCOL_SCSI,
66 .subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD,
67 .request_len = sizeof(cdb),
68 .request = (uintptr_t) cdb,
69 .max_response_len = sizeof(sense),
70 .response = (uintptr_t) sense,
71 .din_xfer_len = buf_len,
72 .din_xferp = (uintptr_t) buf,
73 .timeout = COMMAND_TIMEOUT_MSEC,
74 };
75 int ret;
76
77 ret = ioctl(fd, SG_IO, &io_v4);
78 if (ret != 0) {
79 /* could be that the driver doesn't do version 4, try version 3 */
80 if (errno == EINVAL) {
81 struct sg_io_hdr io_hdr = {
82 .interface_id = 'S',
83 .cmdp = (unsigned char*) cdb,
84 .cmd_len = sizeof (cdb),
85 .dxferp = buf,
86 .dxfer_len = buf_len,
87 .sbp = sense,
88 .mx_sb_len = sizeof(sense),
89 .dxfer_direction = SG_DXFER_FROM_DEV,
90 .timeout = COMMAND_TIMEOUT_MSEC,
91 };
92
93 ret = ioctl(fd, SG_IO, &io_hdr);
94 if (ret != 0)
95 return ret;
96
97 /* even if the ioctl succeeds, we need to check the return value */
98 if (!(io_hdr.status == 0 &&
99 io_hdr.host_status == 0 &&
100 io_hdr.driver_status == 0)) {
101 errno = EIO;
102 return -1;
103 }
104 } else
105 return ret;
106 }
107
108 /* even if the ioctl succeeds, we need to check the return value */
109 if (!(io_v4.device_status == 0 &&
110 io_v4.transport_status == 0 &&
111 io_v4.driver_status == 0)) {
112 errno = EIO;
113 return -1;
114 }
115
116 return 0;
117 }
118
119 static int disk_identify_command(int fd,
120 void *buf,
121 size_t buf_len)
122 {
123 uint8_t cdb[12] = {
124 /*
125 * ATA Pass-Through 12 byte command, as described in
126 *
127 * T10 04-262r8 ATA Command Pass-Through
128 *
129 * from http://www.t10.org/ftp/t10/document.04/04-262r8.pdf
130 */
131 [0] = 0xa1, /* OPERATION CODE: 12 byte pass through */
132 [1] = 4 << 1, /* PROTOCOL: PIO Data-in */
133 [2] = 0x2e, /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
134 [3] = 0, /* FEATURES */
135 [4] = 1, /* SECTORS */
136 [5] = 0, /* LBA LOW */
137 [6] = 0, /* LBA MID */
138 [7] = 0, /* LBA HIGH */
139 [8] = 0 & 0x4F, /* SELECT */
140 [9] = 0xEC, /* Command: ATA IDENTIFY DEVICE */
141 };
142 uint8_t sense[32] = {};
143 uint8_t *desc = sense + 8;
144 struct sg_io_v4 io_v4 = {
145 .guard = 'Q',
146 .protocol = BSG_PROTOCOL_SCSI,
147 .subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD,
148 .request_len = sizeof(cdb),
149 .request = (uintptr_t) cdb,
150 .max_response_len = sizeof(sense),
151 .response = (uintptr_t) sense,
152 .din_xfer_len = buf_len,
153 .din_xferp = (uintptr_t) buf,
154 .timeout = COMMAND_TIMEOUT_MSEC,
155 };
156 int ret;
157
158 ret = ioctl(fd, SG_IO, &io_v4);
159 if (ret != 0) {
160 /* could be that the driver doesn't do version 4, try version 3 */
161 if (errno == EINVAL) {
162 struct sg_io_hdr io_hdr = {
163 .interface_id = 'S',
164 .cmdp = (unsigned char*) cdb,
165 .cmd_len = sizeof (cdb),
166 .dxferp = buf,
167 .dxfer_len = buf_len,
168 .sbp = sense,
169 .mx_sb_len = sizeof (sense),
170 .dxfer_direction = SG_DXFER_FROM_DEV,
171 .timeout = COMMAND_TIMEOUT_MSEC,
172 };
173
174 ret = ioctl(fd, SG_IO, &io_hdr);
175 if (ret != 0)
176 return ret;
177 } else
178 return ret;
179 }
180
181 if (!(sense[0] == 0x72 && desc[0] == 0x9 && desc[1] == 0x0c)) {
182 errno = EIO;
183 return -1;
184 }
185
186 return 0;
187 }
188
189 static int disk_identify_packet_device_command(int fd,
190 void *buf,
191 size_t buf_len)
192 {
193 uint8_t cdb[16] = {
194 /*
195 * ATA Pass-Through 16 byte command, as described in
196 *
197 * T10 04-262r8 ATA Command Pass-Through
198 *
199 * from http://www.t10.org/ftp/t10/document.04/04-262r8.pdf
200 */
201 [0] = 0x85, /* OPERATION CODE: 16 byte pass through */
202 [1] = 4 << 1, /* PROTOCOL: PIO Data-in */
203 [2] = 0x2e, /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
204 [3] = 0, /* FEATURES */
205 [4] = 0, /* FEATURES */
206 [5] = 0, /* SECTORS */
207 [6] = 1, /* SECTORS */
208 [7] = 0, /* LBA LOW */
209 [8] = 0, /* LBA LOW */
210 [9] = 0, /* LBA MID */
211 [10] = 0, /* LBA MID */
212 [11] = 0, /* LBA HIGH */
213 [12] = 0, /* LBA HIGH */
214 [13] = 0, /* DEVICE */
215 [14] = 0xA1, /* Command: ATA IDENTIFY PACKET DEVICE */
216 [15] = 0, /* CONTROL */
217 };
218 uint8_t sense[32] = {};
219 uint8_t *desc = sense + 8;
220 struct sg_io_v4 io_v4 = {
221 .guard = 'Q',
222 .protocol = BSG_PROTOCOL_SCSI,
223 .subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD,
224 .request_len = sizeof (cdb),
225 .request = (uintptr_t) cdb,
226 .max_response_len = sizeof (sense),
227 .response = (uintptr_t) sense,
228 .din_xfer_len = buf_len,
229 .din_xferp = (uintptr_t) buf,
230 .timeout = COMMAND_TIMEOUT_MSEC,
231 };
232 int ret;
233
234 ret = ioctl(fd, SG_IO, &io_v4);
235 if (ret != 0) {
236 /* could be that the driver doesn't do version 4, try version 3 */
237 if (errno == EINVAL) {
238 struct sg_io_hdr io_hdr = {
239 .interface_id = 'S',
240 .cmdp = (unsigned char*) cdb,
241 .cmd_len = sizeof (cdb),
242 .dxferp = buf,
243 .dxfer_len = buf_len,
244 .sbp = sense,
245 .mx_sb_len = sizeof (sense),
246 .dxfer_direction = SG_DXFER_FROM_DEV,
247 .timeout = COMMAND_TIMEOUT_MSEC,
248 };
249
250 ret = ioctl(fd, SG_IO, &io_hdr);
251 if (ret != 0)
252 return ret;
253 } else
254 return ret;
255 }
256
257 if (!(sense[0] == 0x72 && desc[0] == 0x9 && desc[1] == 0x0c)) {
258 errno = EIO;
259 return -1;
260 }
261
262 return 0;
263 }
264
265 /**
266 * disk_identify_get_string:
267 * @identify: A block of IDENTIFY data
268 * @offset_words: Offset of the string to get, in words.
269 * @dest: Destination buffer for the string.
270 * @dest_len: Length of destination buffer, in bytes.
271 *
272 * Copies the ATA string from @identify located at @offset_words into @dest.
273 */
274 static void disk_identify_get_string(uint8_t identify[512],
275 unsigned int offset_words,
276 char *dest,
277 size_t dest_len)
278 {
279 unsigned int c1;
280 unsigned int c2;
281
282 while (dest_len > 0) {
283 c1 = identify[offset_words * 2 + 1];
284 c2 = identify[offset_words * 2];
285 *dest = c1;
286 dest++;
287 *dest = c2;
288 dest++;
289 offset_words++;
290 dest_len -= 2;
291 }
292 }
293
294 static void disk_identify_fixup_string(uint8_t identify[512],
295 unsigned int offset_words,
296 size_t len)
297 {
298 disk_identify_get_string(identify, offset_words,
299 (char *) identify + offset_words * 2, len);
300 }
301
302 static void disk_identify_fixup_uint16 (uint8_t identify[512], unsigned int offset_words)
303 {
304 uint16_t *p;
305
306 p = (uint16_t *) identify;
307 p[offset_words] = le16toh (p[offset_words]);
308 }
309
310 /**
311 * disk_identify:
312 * @udev: The libudev context.
313 * @fd: File descriptor for the block device.
314 * @out_identify: Return location for IDENTIFY data.
315 * @out_is_packet_device: Return location for whether returned data is from a IDENTIFY PACKET DEVICE.
316 *
317 * Sends the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command to the
318 * device represented by @fd. If successful, then the result will be
319 * copied into @out_identify and @out_is_packet_device.
320 *
321 * This routine is based on code from libatasmart, Copyright 2008
322 * Lennart Poettering, LGPL v2.1.
323 *
324 * Returns: 0 if the data was successfully obtained, otherwise
325 * non-zero with errno set.
326 */
327 static int disk_identify(struct udev *udev,
328 int fd,
329 uint8_t out_identify[512],
330 int *out_is_packet_device)
331 {
332 int ret;
333 uint8_t inquiry_buf[36];
334 int peripheral_device_type;
335 int all_nul_bytes;
336 int n;
337 int is_packet_device = 0;
338
339 /* init results */
340 memzero(out_identify, 512);
341
342 /* If we were to use ATA PASS_THROUGH (12) on an ATAPI device
343 * we could accidentally blank media. This is because MMC's BLANK
344 * command has the same op-code (0x61).
345 *
346 * To prevent this from happening we bail out if the device
347 * isn't a Direct Access Block Device, e.g. SCSI type 0x00
348 * (CD/DVD devices are type 0x05). So we send a SCSI INQUIRY
349 * command first... libata is handling this via its SCSI
350 * emulation layer.
351 *
352 * This also ensures that we're actually dealing with a device
353 * that understands SCSI commands.
354 *
355 * (Yes, it is a bit perverse that we're tunneling the ATA
356 * command through SCSI and relying on the ATA driver
357 * emulating SCSI well-enough...)
358 *
359 * (See commit 160b069c25690bfb0c785994c7c3710289179107 for
360 * the original bug-fix and see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=556635
361 * for the original bug-report.)
362 */
363 ret = disk_scsi_inquiry_command (fd, inquiry_buf, sizeof (inquiry_buf));
364 if (ret != 0)
365 goto out;
366
367 /* SPC-4, section 6.4.2: Standard INQUIRY data */
368 peripheral_device_type = inquiry_buf[0] & 0x1f;
369 if (peripheral_device_type == 0x05)
370 {
371 is_packet_device = 1;
372 ret = disk_identify_packet_device_command(fd, out_identify, 512);
373 goto check_nul_bytes;
374 }
375 if (peripheral_device_type != 0x00) {
376 ret = -1;
377 errno = EIO;
378 goto out;
379 }
380
381 /* OK, now issue the IDENTIFY DEVICE command */
382 ret = disk_identify_command(fd, out_identify, 512);
383 if (ret != 0)
384 goto out;
385
386 check_nul_bytes:
387 /* Check if IDENTIFY data is all NUL bytes - if so, bail */
388 all_nul_bytes = 1;
389 for (n = 0; n < 512; n++) {
390 if (out_identify[n] != '\0') {
391 all_nul_bytes = 0;
392 break;
393 }
394 }
395
396 if (all_nul_bytes) {
397 ret = -1;
398 errno = EIO;
399 goto out;
400 }
401
402 out:
403 if (out_is_packet_device != NULL)
404 *out_is_packet_device = is_packet_device;
405 return ret;
406 }
407
408 _printf_(6,0)
409 static void log_fn(struct udev *udev, int priority,
410 const char *file, int line, const char *fn,
411 const char *format, va_list args)
412 {
413 log_metav(priority, file, line, fn, format, args);
414 }
415
416 int main(int argc, char *argv[])
417 {
418 struct udev *udev;
419 struct hd_driveid id;
420 uint8_t identify[512];
421 uint16_t *identify_words;
422 char model[41];
423 char model_enc[256];
424 char serial[21];
425 char revision[9];
426 const char *node = NULL;
427 int export = 0;
428 int fd;
429 uint16_t word;
430 int rc = 0;
431 int is_packet_device = 0;
432 static const struct option options[] = {
433 { "export", no_argument, NULL, 'x' },
434 { "help", no_argument, NULL, 'h' },
435 {}
436 };
437
438 log_parse_environment();
439 log_open();
440
441 udev = udev_new();
442 if (udev == NULL)
443 goto exit;
444
445 udev_set_log_fn(udev, log_fn);
446
447 while (1) {
448 int option;
449
450 option = getopt_long(argc, argv, "xh", options, NULL);
451 if (option == -1)
452 break;
453
454 switch (option) {
455 case 'x':
456 export = 1;
457 break;
458 case 'h':
459 printf("Usage: ata_id [--export] [--help] <device>\n"
460 " --export print values as environment keys\n"
461 " --help print this help text\n\n");
462 goto exit;
463 }
464 }
465
466 node = argv[optind];
467 if (node == NULL) {
468 log_error("no node specified");
469 rc = 1;
470 goto exit;
471 }
472
473 fd = open(node, O_RDONLY|O_NONBLOCK|O_CLOEXEC);
474 if (fd < 0) {
475 log_error("unable to open '%s'", node);
476 rc = 1;
477 goto exit;
478 }
479
480 if (disk_identify(udev, fd, identify, &is_packet_device) == 0) {
481 /*
482 * fix up only the fields from the IDENTIFY data that we are going to
483 * use and copy it into the hd_driveid struct for convenience
484 */
485 disk_identify_fixup_string(identify, 10, 20); /* serial */
486 disk_identify_fixup_string(identify, 23, 8); /* fwrev */
487 disk_identify_fixup_string(identify, 27, 40); /* model */
488 disk_identify_fixup_uint16(identify, 0); /* configuration */
489 disk_identify_fixup_uint16(identify, 75); /* queue depth */
490 disk_identify_fixup_uint16(identify, 75); /* SATA capabilities */
491 disk_identify_fixup_uint16(identify, 82); /* command set supported */
492 disk_identify_fixup_uint16(identify, 83); /* command set supported */
493 disk_identify_fixup_uint16(identify, 84); /* command set supported */
494 disk_identify_fixup_uint16(identify, 85); /* command set supported */
495 disk_identify_fixup_uint16(identify, 86); /* command set supported */
496 disk_identify_fixup_uint16(identify, 87); /* command set supported */
497 disk_identify_fixup_uint16(identify, 89); /* time required for SECURITY ERASE UNIT */
498 disk_identify_fixup_uint16(identify, 90); /* time required for enhanced SECURITY ERASE UNIT */
499 disk_identify_fixup_uint16(identify, 91); /* current APM values */
500 disk_identify_fixup_uint16(identify, 94); /* current AAM value */
501 disk_identify_fixup_uint16(identify, 128); /* device lock function */
502 disk_identify_fixup_uint16(identify, 217); /* nominal media rotation rate */
503 memcpy(&id, identify, sizeof id);
504 } else {
505 /* If this fails, then try HDIO_GET_IDENTITY */
506 if (ioctl(fd, HDIO_GET_IDENTITY, &id) != 0) {
507 log_debug("HDIO_GET_IDENTITY failed for '%s': %m", node);
508 rc = 2;
509 goto close;
510 }
511 }
512 identify_words = (uint16_t *) identify;
513
514 memcpy (model, id.model, 40);
515 model[40] = '\0';
516 udev_util_encode_string(model, model_enc, sizeof(model_enc));
517 util_replace_whitespace((char *) id.model, model, 40);
518 util_replace_chars(model, NULL);
519 util_replace_whitespace((char *) id.serial_no, serial, 20);
520 util_replace_chars(serial, NULL);
521 util_replace_whitespace((char *) id.fw_rev, revision, 8);
522 util_replace_chars(revision, NULL);
523
524 if (export) {
525 /* Set this to convey the disk speaks the ATA protocol */
526 printf("ID_ATA=1\n");
527
528 if ((id.config >> 8) & 0x80) {
529 /* This is an ATAPI device */
530 switch ((id.config >> 8) & 0x1f) {
531 case 0:
532 printf("ID_TYPE=cd\n");
533 break;
534 case 1:
535 printf("ID_TYPE=tape\n");
536 break;
537 case 5:
538 printf("ID_TYPE=cd\n");
539 break;
540 case 7:
541 printf("ID_TYPE=optical\n");
542 break;
543 default:
544 printf("ID_TYPE=generic\n");
545 break;
546 }
547 } else {
548 printf("ID_TYPE=disk\n");
549 }
550 printf("ID_BUS=ata\n");
551 printf("ID_MODEL=%s\n", model);
552 printf("ID_MODEL_ENC=%s\n", model_enc);
553 printf("ID_REVISION=%s\n", revision);
554 if (serial[0] != '\0') {
555 printf("ID_SERIAL=%s_%s\n", model, serial);
556 printf("ID_SERIAL_SHORT=%s\n", serial);
557 } else {
558 printf("ID_SERIAL=%s\n", model);
559 }
560
561 if (id.command_set_1 & (1<<5)) {
562 printf ("ID_ATA_WRITE_CACHE=1\n");
563 printf ("ID_ATA_WRITE_CACHE_ENABLED=%d\n", (id.cfs_enable_1 & (1<<5)) ? 1 : 0);
564 }
565 if (id.command_set_1 & (1<<10)) {
566 printf("ID_ATA_FEATURE_SET_HPA=1\n");
567 printf("ID_ATA_FEATURE_SET_HPA_ENABLED=%d\n", (id.cfs_enable_1 & (1<<10)) ? 1 : 0);
568
569 /*
570 * TODO: use the READ NATIVE MAX ADDRESS command to get the native max address
571 * so it is easy to check whether the protected area is in use.
572 */
573 }
574 if (id.command_set_1 & (1<<3)) {
575 printf("ID_ATA_FEATURE_SET_PM=1\n");
576 printf("ID_ATA_FEATURE_SET_PM_ENABLED=%d\n", (id.cfs_enable_1 & (1<<3)) ? 1 : 0);
577 }
578 if (id.command_set_1 & (1<<1)) {
579 printf("ID_ATA_FEATURE_SET_SECURITY=1\n");
580 printf("ID_ATA_FEATURE_SET_SECURITY_ENABLED=%d\n", (id.cfs_enable_1 & (1<<1)) ? 1 : 0);
581 printf("ID_ATA_FEATURE_SET_SECURITY_ERASE_UNIT_MIN=%d\n", id.trseuc * 2);
582 if ((id.cfs_enable_1 & (1<<1))) /* enabled */ {
583 if (id.dlf & (1<<8))
584 printf("ID_ATA_FEATURE_SET_SECURITY_LEVEL=maximum\n");
585 else
586 printf("ID_ATA_FEATURE_SET_SECURITY_LEVEL=high\n");
587 }
588 if (id.dlf & (1<<5))
589 printf("ID_ATA_FEATURE_SET_SECURITY_ENHANCED_ERASE_UNIT_MIN=%d\n", id.trsEuc * 2);
590 if (id.dlf & (1<<4))
591 printf("ID_ATA_FEATURE_SET_SECURITY_EXPIRE=1\n");
592 if (id.dlf & (1<<3))
593 printf("ID_ATA_FEATURE_SET_SECURITY_FROZEN=1\n");
594 if (id.dlf & (1<<2))
595 printf("ID_ATA_FEATURE_SET_SECURITY_LOCKED=1\n");
596 }
597 if (id.command_set_1 & (1<<0)) {
598 printf("ID_ATA_FEATURE_SET_SMART=1\n");
599 printf("ID_ATA_FEATURE_SET_SMART_ENABLED=%d\n", (id.cfs_enable_1 & (1<<0)) ? 1 : 0);
600 }
601 if (id.command_set_2 & (1<<9)) {
602 printf("ID_ATA_FEATURE_SET_AAM=1\n");
603 printf("ID_ATA_FEATURE_SET_AAM_ENABLED=%d\n", (id.cfs_enable_2 & (1<<9)) ? 1 : 0);
604 printf("ID_ATA_FEATURE_SET_AAM_VENDOR_RECOMMENDED_VALUE=%d\n", id.acoustic >> 8);
605 printf("ID_ATA_FEATURE_SET_AAM_CURRENT_VALUE=%d\n", id.acoustic & 0xff);
606 }
607 if (id.command_set_2 & (1<<5)) {
608 printf("ID_ATA_FEATURE_SET_PUIS=1\n");
609 printf("ID_ATA_FEATURE_SET_PUIS_ENABLED=%d\n", (id.cfs_enable_2 & (1<<5)) ? 1 : 0);
610 }
611 if (id.command_set_2 & (1<<3)) {
612 printf("ID_ATA_FEATURE_SET_APM=1\n");
613 printf("ID_ATA_FEATURE_SET_APM_ENABLED=%d\n", (id.cfs_enable_2 & (1<<3)) ? 1 : 0);
614 if ((id.cfs_enable_2 & (1<<3)))
615 printf("ID_ATA_FEATURE_SET_APM_CURRENT_VALUE=%d\n", id.CurAPMvalues & 0xff);
616 }
617 if (id.command_set_2 & (1<<0))
618 printf("ID_ATA_DOWNLOAD_MICROCODE=1\n");
619
620 /*
621 * Word 76 indicates the capabilities of a SATA device. A PATA device shall set
622 * word 76 to 0000h or FFFFh. If word 76 is set to 0000h or FFFFh, then
623 * the device does not claim compliance with the Serial ATA specification and words
624 * 76 through 79 are not valid and shall be ignored.
625 */
626 word = *((uint16_t *) identify + 76);
627 if (word != 0x0000 && word != 0xffff) {
628 printf("ID_ATA_SATA=1\n");
629 /*
630 * If bit 2 of word 76 is set to one, then the device supports the Gen2
631 * signaling rate of 3.0 Gb/s (see SATA 2.6).
632 *
633 * If bit 1 of word 76 is set to one, then the device supports the Gen1
634 * signaling rate of 1.5 Gb/s (see SATA 2.6).
635 */
636 if (word & (1<<2))
637 printf("ID_ATA_SATA_SIGNAL_RATE_GEN2=1\n");
638 if (word & (1<<1))
639 printf("ID_ATA_SATA_SIGNAL_RATE_GEN1=1\n");
640 }
641
642 /* Word 217 indicates the nominal media rotation rate of the device */
643 word = *((uint16_t *) identify + 217);
644 if (word != 0x0000) {
645 if (word == 0x0001) {
646 printf ("ID_ATA_ROTATION_RATE_RPM=0\n"); /* non-rotating e.g. SSD */
647 } else if (word >= 0x0401 && word <= 0xfffe) {
648 printf ("ID_ATA_ROTATION_RATE_RPM=%d\n", word);
649 }
650 }
651
652 /*
653 * Words 108-111 contain a mandatory World Wide Name (WWN) in the NAA IEEE Registered identifier
654 * format. Word 108 bits (15:12) shall contain 5h, indicating that the naming authority is IEEE.
655 * All other values are reserved.
656 */
657 word = *((uint16_t *) identify + 108);
658 if ((word & 0xf000) == 0x5000) {
659 uint64_t wwwn;
660
661 wwwn = *((uint16_t *) identify + 108);
662 wwwn <<= 16;
663 wwwn |= *((uint16_t *) identify + 109);
664 wwwn <<= 16;
665 wwwn |= *((uint16_t *) identify + 110);
666 wwwn <<= 16;
667 wwwn |= *((uint16_t *) identify + 111);
668 printf("ID_WWN=0x%llx\n", (unsigned long long int) wwwn);
669 /* ATA devices have no vendor extension */
670 printf("ID_WWN_WITH_EXTENSION=0x%llx\n", (unsigned long long int) wwwn);
671 }
672
673 /* from Linux's include/linux/ata.h */
674 if (identify_words[0] == 0x848a || identify_words[0] == 0x844a) {
675 printf("ID_ATA_CFA=1\n");
676 } else {
677 if ((identify_words[83] & 0xc004) == 0x4004) {
678 printf("ID_ATA_CFA=1\n");
679 }
680 }
681 } else {
682 if (serial[0] != '\0')
683 printf("%s_%s\n", model, serial);
684 else
685 printf("%s\n", model);
686 }
687 close:
688 close(fd);
689 exit:
690 udev_unref(udev);
691 log_close();
692 return rc;
693 }