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e0f83fbe | 1 | /* |
c521693b GKH |
2 | * Copyright (C) IBM Corp. 2003 |
3 | * | |
8b5651bb | 4 | * Author: Patrick Mansfield<patmans@us.ibm.com> |
c521693b | 5 | * |
8b5651bb KS |
6 | * This program is free software: you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
c521693b GKH |
18 | */ |
19 | ||
20 | #include <sys/types.h> | |
21 | #include <sys/ioctl.h> | |
629e57e0 | 22 | #include <sys/stat.h> |
c521693b GKH |
23 | #include <stdio.h> |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <fcntl.h> | |
27 | #include <stdlib.h> | |
28 | #include <unistd.h> | |
959e8b5d | 29 | #include <time.h> |
78d9ecfd HR |
30 | #include <inttypes.h> |
31 | #include <scsi/scsi.h> | |
c521693b | 32 | #include <scsi/sg.h> |
78d9ecfd | 33 | #include <linux/types.h> |
24355313 | 34 | #include <linux/bsg.h> |
1aa1e248 | 35 | |
9060b066 KS |
36 | #include "libudev.h" |
37 | #include "libudev-private.h" | |
c521693b | 38 | #include "scsi.h" |
1aa1e248 | 39 | #include "scsi_id.h" |
3df3e884 | 40 | #include "random-util.h" |
c521693b GKH |
41 | |
42 | /* | |
43 | * A priority based list of id, naa, and binary/ascii for the identifier | |
44 | * descriptor in VPD page 0x83. | |
45 | * | |
46 | * Brute force search for a match starting with the first value in the | |
47 | * following id_search_list. This is not a performance issue, since there | |
48 | * is normally one or some small number of descriptors. | |
49 | */ | |
50 | static const struct scsi_id_search_values id_search_list[] = { | |
912541b0 KS |
51 | { SCSI_ID_TGTGROUP, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, |
52 | { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY }, | |
53 | { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII }, | |
54 | { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY }, | |
55 | { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII }, | |
56 | /* | |
57 | * Devices already exist using NAA values that are now marked | |
58 | * reserved. These should not conflict with other values, or it is | |
59 | * a bug in the device. As long as we find the IEEE extended one | |
60 | * first, we really don't care what other ones are used. Using | |
61 | * don't care here means that a device that returns multiple | |
62 | * non-IEEE descriptors in a random order will get different | |
63 | * names. | |
64 | */ | |
65 | { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, | |
66 | { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, | |
67 | { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, | |
68 | { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, | |
69 | { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, | |
70 | { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, | |
71 | { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, | |
72 | { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, | |
c521693b GKH |
73 | }; |
74 | ||
75 | static const char hex_str[]="0123456789abcdef"; | |
76 | ||
c521693b GKH |
77 | /* |
78 | * Values returned in the result/status, only the ones used by the code | |
79 | * are used here. | |
80 | */ | |
81 | ||
912541b0 KS |
82 | #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */ |
83 | #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */ | |
84 | #define DID_TIME_OUT 0x03 /* Timed out for some other reason */ | |
85 | #define DRIVER_TIMEOUT 0x06 | |
86 | #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */ | |
c521693b GKH |
87 | |
88 | /* The following "category" function returns one of the following */ | |
912541b0 KS |
89 | #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */ |
90 | #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */ | |
91 | #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */ | |
92 | #define SG_ERR_CAT_TIMEOUT 3 | |
93 | #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */ | |
94 | #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */ | |
95 | #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */ | |
96 | #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */ | |
c521693b | 97 | |
4e9fdfcc | 98 | static int do_scsi_page80_inquiry(struct udev *udev, |
912541b0 KS |
99 | struct scsi_id_device *dev_scsi, int fd, |
100 | char *serial, char *serial_short, int max_len); | |
4e9fdfcc | 101 | |
7d563a17 | 102 | static int sg_err_category_new(struct udev *udev, |
912541b0 KS |
103 | int scsi_status, int msg_status, int |
104 | host_status, int driver_status, const | |
105 | unsigned char *sense_buffer, int sb_len) | |
c521693b | 106 | { |
912541b0 KS |
107 | scsi_status &= 0x7e; |
108 | ||
109 | /* | |
110 | * XXX change to return only two values - failed or OK. | |
111 | */ | |
112 | ||
113 | if (!scsi_status && !host_status && !driver_status) | |
114 | return SG_ERR_CAT_CLEAN; | |
115 | ||
116 | if ((scsi_status == SCSI_CHECK_CONDITION) || | |
117 | (scsi_status == SCSI_COMMAND_TERMINATED) || | |
118 | ((driver_status & 0xf) == DRIVER_SENSE)) { | |
119 | if (sense_buffer && (sb_len > 2)) { | |
120 | int sense_key; | |
121 | unsigned char asc; | |
122 | ||
123 | if (sense_buffer[0] & 0x2) { | |
124 | sense_key = sense_buffer[1] & 0xf; | |
125 | asc = sense_buffer[2]; | |
126 | } else { | |
127 | sense_key = sense_buffer[2] & 0xf; | |
128 | asc = (sb_len > 12) ? sense_buffer[12] : 0; | |
129 | } | |
130 | ||
131 | if (sense_key == RECOVERED_ERROR) | |
132 | return SG_ERR_CAT_RECOVERED; | |
133 | else if (sense_key == UNIT_ATTENTION) { | |
134 | if (0x28 == asc) | |
135 | return SG_ERR_CAT_MEDIA_CHANGED; | |
136 | if (0x29 == asc) | |
137 | return SG_ERR_CAT_RESET; | |
138 | } else if (sense_key == ILLEGAL_REQUEST) { | |
139 | return SG_ERR_CAT_NOTSUPPORTED; | |
140 | } | |
141 | } | |
142 | return SG_ERR_CAT_SENSE; | |
143 | } | |
144 | if (host_status) { | |
145 | if ((host_status == DID_NO_CONNECT) || | |
146 | (host_status == DID_BUS_BUSY) || | |
147 | (host_status == DID_TIME_OUT)) | |
148 | return SG_ERR_CAT_TIMEOUT; | |
149 | } | |
150 | if (driver_status) { | |
151 | if (driver_status == DRIVER_TIMEOUT) | |
152 | return SG_ERR_CAT_TIMEOUT; | |
153 | } | |
154 | return SG_ERR_CAT_OTHER; | |
c521693b GKH |
155 | } |
156 | ||
7d563a17 | 157 | static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp) |
c521693b | 158 | { |
912541b0 KS |
159 | return sg_err_category_new(udev, |
160 | hp->status, hp->msg_status, | |
161 | hp->host_status, hp->driver_status, | |
162 | hp->sbp, hp->sb_len_wr); | |
c521693b GKH |
163 | } |
164 | ||
7d563a17 | 165 | static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp) |
78d9ecfd | 166 | { |
912541b0 KS |
167 | return sg_err_category_new(udev, hp->device_status, 0, |
168 | hp->transport_status, hp->driver_status, | |
169 | (unsigned char *)(uintptr_t)hp->response, | |
170 | hp->response_len); | |
78d9ecfd HR |
171 | } |
172 | ||
7d563a17 | 173 | static int scsi_dump_sense(struct udev *udev, |
912541b0 KS |
174 | struct scsi_id_device *dev_scsi, |
175 | unsigned char *sense_buffer, int sb_len) | |
c521693b | 176 | { |
912541b0 KS |
177 | int s; |
178 | int code; | |
179 | int sense_class; | |
180 | int sense_key; | |
181 | int asc, ascq; | |
c521693b | 182 | #ifdef DUMP_SENSE |
912541b0 KS |
183 | char out_buffer[256]; |
184 | int i, j; | |
c521693b GKH |
185 | #endif |
186 | ||
912541b0 KS |
187 | /* |
188 | * Figure out and print the sense key, asc and ascq. | |
189 | * | |
190 | * If you want to suppress these for a particular drive model, add | |
191 | * a black list entry in the scsi_id config file. | |
192 | * | |
193 | * XXX We probably need to: lookup the sense/asc/ascq in a retry | |
194 | * table, and if found return 1 (after dumping the sense, asc, and | |
195 | * ascq). So, if/when we get something like a power on/reset, | |
196 | * we'll retry the command. | |
197 | */ | |
198 | ||
912541b0 | 199 | if (sb_len < 1) { |
9f6445e3 | 200 | log_debug("%s: sense buffer empty", dev_scsi->kernel); |
912541b0 KS |
201 | return -1; |
202 | } | |
203 | ||
204 | sense_class = (sense_buffer[0] >> 4) & 0x07; | |
205 | code = sense_buffer[0] & 0xf; | |
206 | ||
207 | if (sense_class == 7) { | |
208 | /* | |
209 | * extended sense data. | |
210 | */ | |
211 | s = sense_buffer[7] + 8; | |
212 | if (sb_len < s) { | |
9f6445e3 | 213 | log_debug("%s: sense buffer too small %d bytes, %d bytes too short", |
912541b0 KS |
214 | dev_scsi->kernel, sb_len, s - sb_len); |
215 | return -1; | |
216 | } | |
217 | if ((code == 0x0) || (code == 0x1)) { | |
218 | sense_key = sense_buffer[2] & 0xf; | |
219 | if (s < 14) { | |
220 | /* | |
221 | * Possible? | |
222 | */ | |
9f6445e3 | 223 | log_debug("%s: sense result too" " small %d bytes", |
912541b0 KS |
224 | dev_scsi->kernel, s); |
225 | return -1; | |
226 | } | |
227 | asc = sense_buffer[12]; | |
228 | ascq = sense_buffer[13]; | |
229 | } else if ((code == 0x2) || (code == 0x3)) { | |
230 | sense_key = sense_buffer[1] & 0xf; | |
231 | asc = sense_buffer[2]; | |
232 | ascq = sense_buffer[3]; | |
233 | } else { | |
9f6445e3 | 234 | log_debug("%s: invalid sense code 0x%x", |
912541b0 KS |
235 | dev_scsi->kernel, code); |
236 | return -1; | |
237 | } | |
9f6445e3 | 238 | log_debug("%s: sense key 0x%x ASC 0x%x ASCQ 0x%x", |
912541b0 KS |
239 | dev_scsi->kernel, sense_key, asc, ascq); |
240 | } else { | |
241 | if (sb_len < 4) { | |
9f6445e3 | 242 | log_debug("%s: sense buffer too small %d bytes, %d bytes too short", |
912541b0 KS |
243 | dev_scsi->kernel, sb_len, 4 - sb_len); |
244 | return -1; | |
245 | } | |
246 | ||
247 | if (sense_buffer[0] < 15) | |
9f6445e3 | 248 | log_debug("%s: old sense key: 0x%x", dev_scsi->kernel, sense_buffer[0] & 0x0f); |
912541b0 | 249 | else |
9f6445e3 | 250 | log_debug("%s: sense = %2x %2x", |
912541b0 | 251 | dev_scsi->kernel, sense_buffer[0], sense_buffer[2]); |
9f6445e3 | 252 | log_debug("%s: non-extended sense class %d code 0x%0x", |
912541b0 KS |
253 | dev_scsi->kernel, sense_class, code); |
254 | ||
255 | } | |
c521693b GKH |
256 | |
257 | #ifdef DUMP_SENSE | |
912541b0 | 258 | for (i = 0, j = 0; (i < s) && (j < 254); i++) { |
912541b0 KS |
259 | out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4]; |
260 | out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f]; | |
261 | out_buffer[j++] = ' '; | |
262 | } | |
263 | out_buffer[j] = '\0'; | |
9f6445e3 LP |
264 | log_debug("%s: sense dump:", dev_scsi->kernel); |
265 | log_debug("%s: %s", dev_scsi->kernel, out_buffer); | |
c521693b GKH |
266 | |
267 | #endif | |
912541b0 | 268 | return -1; |
c521693b GKH |
269 | } |
270 | ||
7d563a17 | 271 | static int scsi_dump(struct udev *udev, |
912541b0 | 272 | struct scsi_id_device *dev_scsi, struct sg_io_hdr *io) |
c521693b | 273 | { |
912541b0 KS |
274 | if (!io->status && !io->host_status && !io->msg_status && |
275 | !io->driver_status) { | |
276 | /* | |
277 | * Impossible, should not be called. | |
278 | */ | |
9f6445e3 | 279 | log_debug("%s: called with no error", __FUNCTION__); |
912541b0 KS |
280 | return -1; |
281 | } | |
282 | ||
9f6445e3 | 283 | log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x", |
912541b0 KS |
284 | dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status); |
285 | if (io->status == SCSI_CHECK_CONDITION) | |
286 | return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr); | |
287 | else | |
288 | return -1; | |
78d9ecfd HR |
289 | } |
290 | ||
7d563a17 | 291 | static int scsi_dump_v4(struct udev *udev, |
912541b0 | 292 | struct scsi_id_device *dev_scsi, struct sg_io_v4 *io) |
78d9ecfd | 293 | { |
912541b0 KS |
294 | if (!io->device_status && !io->transport_status && |
295 | !io->driver_status) { | |
296 | /* | |
297 | * Impossible, should not be called. | |
298 | */ | |
9f6445e3 | 299 | log_debug("%s: called with no error", __FUNCTION__); |
912541b0 KS |
300 | return -1; |
301 | } | |
302 | ||
9f6445e3 | 303 | log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x", |
912541b0 KS |
304 | dev_scsi->kernel, io->driver_status, io->transport_status, |
305 | io->device_status); | |
306 | if (io->device_status == SCSI_CHECK_CONDITION) | |
307 | return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response, | |
308 | io->response_len); | |
309 | else | |
310 | return -1; | |
c521693b GKH |
311 | } |
312 | ||
7d563a17 | 313 | static int scsi_inquiry(struct udev *udev, |
912541b0 KS |
314 | struct scsi_id_device *dev_scsi, int fd, |
315 | unsigned char evpd, unsigned char page, | |
316 | unsigned char *buf, unsigned int buflen) | |
c521693b | 317 | { |
912541b0 KS |
318 | unsigned char inq_cmd[INQUIRY_CMDLEN] = |
319 | { INQUIRY_CMD, evpd, page, 0, buflen, 0 }; | |
320 | unsigned char sense[SENSE_BUFF_LEN]; | |
321 | void *io_buf; | |
322 | struct sg_io_v4 io_v4; | |
323 | struct sg_io_hdr io_hdr; | |
324 | int retry = 3; /* rather random */ | |
325 | int retval; | |
326 | ||
327 | if (buflen > SCSI_INQ_BUFF_LEN) { | |
9f6445e3 | 328 | log_debug("buflen %d too long", buflen); |
912541b0 KS |
329 | return -1; |
330 | } | |
c521693b GKH |
331 | |
332 | resend: | |
912541b0 | 333 | if (dev_scsi->use_sg == 4) { |
29804cc1 | 334 | memzero(&io_v4, sizeof(struct sg_io_v4)); |
912541b0 KS |
335 | io_v4.guard = 'Q'; |
336 | io_v4.protocol = BSG_PROTOCOL_SCSI; | |
337 | io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD; | |
338 | io_v4.request_len = sizeof(inq_cmd); | |
339 | io_v4.request = (uintptr_t)inq_cmd; | |
340 | io_v4.max_response_len = sizeof(sense); | |
341 | io_v4.response = (uintptr_t)sense; | |
342 | io_v4.din_xfer_len = buflen; | |
343 | io_v4.din_xferp = (uintptr_t)buf; | |
344 | io_buf = (void *)&io_v4; | |
345 | } else { | |
29804cc1 | 346 | memzero(&io_hdr, sizeof(struct sg_io_hdr)); |
912541b0 KS |
347 | io_hdr.interface_id = 'S'; |
348 | io_hdr.cmd_len = sizeof(inq_cmd); | |
349 | io_hdr.mx_sb_len = sizeof(sense); | |
350 | io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
351 | io_hdr.dxfer_len = buflen; | |
352 | io_hdr.dxferp = buf; | |
353 | io_hdr.cmdp = inq_cmd; | |
354 | io_hdr.sbp = sense; | |
355 | io_hdr.timeout = DEF_TIMEOUT; | |
356 | io_buf = (void *)&io_hdr; | |
357 | } | |
358 | ||
359 | retval = ioctl(fd, SG_IO, io_buf); | |
360 | if (retval < 0) { | |
361 | if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) { | |
362 | dev_scsi->use_sg = 3; | |
363 | goto resend; | |
364 | } | |
56f64d95 | 365 | log_debug_errno(errno, "%s: ioctl failed: %m", dev_scsi->kernel); |
912541b0 KS |
366 | goto error; |
367 | } | |
368 | ||
369 | if (dev_scsi->use_sg == 4) | |
370 | retval = sg_err_category4(udev, io_buf); | |
371 | else | |
372 | retval = sg_err_category3(udev, io_buf); | |
373 | ||
374 | switch (retval) { | |
375 | case SG_ERR_CAT_NOTSUPPORTED: | |
376 | buf[1] = 0; | |
377 | /* Fallthrough */ | |
378 | case SG_ERR_CAT_CLEAN: | |
379 | case SG_ERR_CAT_RECOVERED: | |
380 | retval = 0; | |
381 | break; | |
382 | ||
383 | default: | |
384 | if (dev_scsi->use_sg == 4) | |
385 | retval = scsi_dump_v4(udev, dev_scsi, io_buf); | |
386 | else | |
387 | retval = scsi_dump(udev, dev_scsi, io_buf); | |
388 | } | |
389 | ||
390 | if (!retval) { | |
391 | retval = buflen; | |
392 | } else if (retval > 0) { | |
baa30fbc | 393 | if (--retry > 0) |
912541b0 | 394 | goto resend; |
912541b0 KS |
395 | retval = -1; |
396 | } | |
c521693b | 397 | |
01f950e2 | 398 | error: |
912541b0 | 399 | if (retval < 0) |
9f6445e3 | 400 | log_debug("%s: Unable to get INQUIRY vpd %d page 0x%x.", |
912541b0 | 401 | dev_scsi->kernel, evpd, page); |
062db23d | 402 | |
912541b0 | 403 | return retval; |
c521693b GKH |
404 | } |
405 | ||
01f950e2 | 406 | /* Get list of supported EVPD pages */ |
7d563a17 | 407 | static int do_scsi_page0_inquiry(struct udev *udev, |
912541b0 KS |
408 | struct scsi_id_device *dev_scsi, int fd, |
409 | unsigned char *buffer, unsigned int len) | |
c521693b | 410 | { |
912541b0 KS |
411 | int retval; |
412 | ||
29804cc1 | 413 | memzero(buffer, len); |
912541b0 KS |
414 | retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len); |
415 | if (retval < 0) | |
416 | return 1; | |
417 | ||
418 | if (buffer[1] != 0) { | |
9f6445e3 | 419 | log_debug("%s: page 0 not available.", dev_scsi->kernel); |
912541b0 KS |
420 | return 1; |
421 | } | |
422 | if (buffer[3] > len) { | |
9f6445e3 | 423 | log_debug("%s: page 0 buffer too long %d", dev_scsi->kernel, buffer[3]); |
912541b0 KS |
424 | return 1; |
425 | } | |
426 | ||
427 | /* | |
428 | * Following check is based on code once included in the 2.5.x | |
429 | * kernel. | |
430 | * | |
431 | * Some ill behaved devices return the standard inquiry here | |
432 | * rather than the evpd data, snoop the data to verify. | |
433 | */ | |
434 | if (buffer[3] > MODEL_LENGTH) { | |
435 | /* | |
436 | * If the vendor id appears in the page assume the page is | |
437 | * invalid. | |
438 | */ | |
641906e9 | 439 | if (strneq((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) { |
9f6445e3 | 440 | log_debug("%s: invalid page0 data", dev_scsi->kernel); |
912541b0 KS |
441 | return 1; |
442 | } | |
443 | } | |
444 | return 0; | |
c521693b GKH |
445 | } |
446 | ||
447 | /* | |
448 | * The caller checks that serial is long enough to include the vendor + | |
449 | * model. | |
450 | */ | |
7d563a17 | 451 | static int prepend_vendor_model(struct udev *udev, |
912541b0 | 452 | struct scsi_id_device *dev_scsi, char *serial) |
c521693b | 453 | { |
912541b0 KS |
454 | int ind; |
455 | ||
456 | strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH); | |
457 | strncat(serial, dev_scsi->model, MODEL_LENGTH); | |
458 | ind = strlen(serial); | |
459 | ||
460 | /* | |
461 | * This is not a complete check, since we are using strncat/cpy | |
462 | * above, ind will never be too large. | |
463 | */ | |
464 | if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) { | |
9f6445e3 | 465 | log_debug("%s: expected length %d, got length %d", |
912541b0 KS |
466 | dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind); |
467 | return -1; | |
468 | } | |
469 | return ind; | |
c521693b GKH |
470 | } |
471 | ||
bb061708 | 472 | /* |
c521693b GKH |
473 | * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill |
474 | * serial number. | |
bb061708 | 475 | */ |
7d563a17 | 476 | static int check_fill_0x83_id(struct udev *udev, |
912541b0 KS |
477 | struct scsi_id_device *dev_scsi, |
478 | unsigned char *page_83, | |
479 | const struct scsi_id_search_values | |
480 | *id_search, char *serial, char *serial_short, | |
481 | int max_len, char *wwn, | |
482 | char *wwn_vendor_extension, char *tgpt_group) | |
c521693b | 483 | { |
912541b0 KS |
484 | int i, j, s, len; |
485 | ||
486 | /* | |
487 | * ASSOCIATION must be with the device (value 0) | |
488 | * or with the target port for SCSI_ID_TGTPORT | |
489 | */ | |
490 | if ((page_83[1] & 0x30) == 0x10) { | |
491 | if (id_search->id_type != SCSI_ID_TGTGROUP) | |
492 | return 1; | |
493 | } else if ((page_83[1] & 0x30) != 0) { | |
494 | return 1; | |
495 | } | |
496 | ||
497 | if ((page_83[1] & 0x0f) != id_search->id_type) | |
498 | return 1; | |
499 | ||
500 | /* | |
501 | * Possibly check NAA sub-type. | |
502 | */ | |
503 | if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) && | |
504 | (id_search->naa_type != (page_83[4] & 0xf0) >> 4)) | |
505 | return 1; | |
506 | ||
507 | /* | |
508 | * Check for matching code set - ASCII or BINARY. | |
509 | */ | |
510 | if ((page_83[0] & 0x0f) != id_search->code_set) | |
511 | return 1; | |
512 | ||
513 | /* | |
514 | * page_83[3]: identifier length | |
515 | */ | |
516 | len = page_83[3]; | |
517 | if ((page_83[0] & 0x0f) != SCSI_ID_ASCII) | |
518 | /* | |
519 | * If not ASCII, use two bytes for each binary value. | |
520 | */ | |
521 | len *= 2; | |
522 | ||
523 | /* | |
524 | * Add one byte for the NUL termination, and one for the id_type. | |
525 | */ | |
526 | len += 2; | |
527 | if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC) | |
528 | len += VENDOR_LENGTH + MODEL_LENGTH; | |
529 | ||
530 | if (max_len < len) { | |
9f6445e3 | 531 | log_debug("%s: length %d too short - need %d", |
912541b0 KS |
532 | dev_scsi->kernel, max_len, len); |
533 | return 1; | |
534 | } | |
535 | ||
536 | if (id_search->id_type == SCSI_ID_TGTGROUP && tgpt_group != NULL) { | |
537 | unsigned int group; | |
538 | ||
539 | group = ((unsigned int)page_83[6] << 8) | page_83[7]; | |
540 | sprintf(tgpt_group,"%x", group); | |
541 | return 1; | |
542 | } | |
543 | ||
544 | serial[0] = hex_str[id_search->id_type]; | |
545 | ||
546 | /* | |
547 | * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before | |
548 | * the id since it is not unique across all vendors and models, | |
549 | * this differs from SCSI_ID_T10_VENDOR, where the vendor is | |
550 | * included in the identifier. | |
551 | */ | |
552 | if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC) | |
baa30fbc | 553 | if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) |
912541b0 | 554 | return 1; |
912541b0 KS |
555 | |
556 | i = 4; /* offset to the start of the identifier */ | |
557 | s = j = strlen(serial); | |
558 | if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) { | |
559 | /* | |
560 | * ASCII descriptor. | |
561 | */ | |
562 | while (i < (4 + page_83[3])) | |
563 | serial[j++] = page_83[i++]; | |
564 | } else { | |
565 | /* | |
566 | * Binary descriptor, convert to ASCII, using two bytes of | |
567 | * ASCII for each byte in the page_83. | |
568 | */ | |
569 | while (i < (4 + page_83[3])) { | |
570 | serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4]; | |
571 | serial[j++] = hex_str[page_83[i] & 0x0f]; | |
572 | i++; | |
573 | } | |
574 | } | |
575 | ||
576 | strcpy(serial_short, &serial[s]); | |
577 | ||
578 | if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) { | |
579 | strncpy(wwn, &serial[s], 16); | |
ece174c5 | 580 | if (wwn_vendor_extension != NULL) |
912541b0 | 581 | strncpy(wwn_vendor_extension, &serial[s + 16], 16); |
912541b0 KS |
582 | } |
583 | ||
584 | return 0; | |
c521693b GKH |
585 | } |
586 | ||
cbba4a54 | 587 | /* Extract the raw binary from VPD 0x83 pre-SPC devices */ |
7d563a17 | 588 | static int check_fill_0x83_prespc3(struct udev *udev, |
912541b0 KS |
589 | struct scsi_id_device *dev_scsi, |
590 | unsigned char *page_83, | |
591 | const struct scsi_id_search_values | |
592 | *id_search, char *serial, char *serial_short, int max_len) | |
cbba4a54 | 593 | { |
912541b0 KS |
594 | int i, j; |
595 | ||
912541b0 KS |
596 | serial[0] = hex_str[id_search->id_type]; |
597 | /* serial has been memset to zero before */ | |
598 | j = strlen(serial); /* j = 1; */ | |
599 | ||
600 | for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) { | |
601 | serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4]; | |
602 | serial[j++] = hex_str[ page_83[4+i] & 0x0f]; | |
603 | } | |
604 | serial[max_len-1] = 0; | |
605 | strncpy(serial_short, serial, max_len-1); | |
606 | return 0; | |
cbba4a54 KG |
607 | } |
608 | ||
609 | ||
01f950e2 | 610 | /* Get device identification VPD page */ |
7d563a17 | 611 | static int do_scsi_page83_inquiry(struct udev *udev, |
912541b0 KS |
612 | struct scsi_id_device *dev_scsi, int fd, |
613 | char *serial, char *serial_short, int len, | |
614 | char *unit_serial_number, char *wwn, | |
615 | char *wwn_vendor_extension, char *tgpt_group) | |
c521693b | 616 | { |
912541b0 KS |
617 | int retval; |
618 | unsigned int id_ind, j; | |
619 | unsigned char page_83[SCSI_INQ_BUFF_LEN]; | |
c521693b | 620 | |
912541b0 | 621 | /* also pick up the page 80 serial number */ |
4e9fdfcc DZ |
622 | do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN); |
623 | ||
29804cc1 | 624 | memzero(page_83, SCSI_INQ_BUFF_LEN); |
912541b0 KS |
625 | retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, |
626 | SCSI_INQ_BUFF_LEN); | |
627 | if (retval < 0) | |
628 | return 1; | |
629 | ||
630 | if (page_83[1] != PAGE_83) { | |
9f6445e3 | 631 | log_debug("%s: Invalid page 0x83", dev_scsi->kernel); |
912541b0 KS |
632 | return 1; |
633 | } | |
634 | ||
635 | /* | |
636 | * XXX Some devices (IBM 3542) return all spaces for an identifier if | |
637 | * the LUN is not actually configured. This leads to identifiers of | |
638 | * the form: "1 ". | |
639 | */ | |
640 | ||
641 | /* | |
642 | * Model 4, 5, and (some) model 6 EMC Symmetrix devices return | |
643 | * a page 83 reply according to SCSI-2 format instead of SPC-2/3. | |
644 | * | |
645 | * The SCSI-2 page 83 format returns an IEEE WWN in binary | |
646 | * encoded hexi-decimal in the 16 bytes following the initial | |
647 | * 4-byte page 83 reply header. | |
648 | * | |
649 | * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part | |
650 | * of an Identification descriptor. The 3rd byte of the first | |
651 | * Identification descriptor is a reserved (BSZ) byte field. | |
652 | * | |
653 | * Reference the 7th byte of the page 83 reply to determine | |
654 | * whether the reply is compliant with SCSI-2 or SPC-2/3 | |
655 | * specifications. A zero value in the 7th byte indicates | |
656 | * an SPC-2/3 conformant reply, (i.e., the reserved field of the | |
657 | * first Identification descriptor). This byte will be non-zero | |
658 | * for a SCSI-2 conformant page 83 reply from these EMC | |
659 | * Symmetrix models since the 7th byte of the reply corresponds | |
660 | * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is, | |
661 | * 0x006048. | |
662 | */ | |
663 | ||
664 | if (page_83[6] != 0) | |
665 | return check_fill_0x83_prespc3(udev, | |
666 | dev_scsi, page_83, id_search_list, | |
667 | serial, serial_short, len); | |
668 | ||
669 | /* | |
670 | * Search for a match in the prioritized id_search_list - since WWN ids | |
4e9fdfcc | 671 | * come first we can pick up the WWN in check_fill_0x83_id(). |
912541b0 KS |
672 | */ |
673 | for (id_ind = 0; | |
674 | id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]); | |
675 | id_ind++) { | |
676 | /* | |
677 | * Examine each descriptor returned. There is normally only | |
678 | * one or a small number of descriptors. | |
679 | */ | |
680 | for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) { | |
681 | retval = check_fill_0x83_id(udev, | |
682 | dev_scsi, &page_83[j], | |
683 | &id_search_list[id_ind], | |
684 | serial, serial_short, len, | |
685 | wwn, wwn_vendor_extension, | |
686 | tgpt_group); | |
baa30fbc | 687 | if (!retval) |
912541b0 | 688 | return retval; |
baa30fbc | 689 | else if (retval < 0) |
912541b0 | 690 | return retval; |
912541b0 KS |
691 | } |
692 | } | |
693 | return 1; | |
c521693b GKH |
694 | } |
695 | ||
50be1401 EG |
696 | /* |
697 | * Get device identification VPD page for older SCSI-2 device which is not | |
698 | * compliant with either SPC-2 or SPC-3 format. | |
699 | * | |
700 | * Return the hard coded error code value 2 if the page 83 reply is not | |
701 | * conformant to the SCSI-2 format. | |
702 | */ | |
7d563a17 | 703 | static int do_scsi_page83_prespc3_inquiry(struct udev *udev, |
912541b0 KS |
704 | struct scsi_id_device *dev_scsi, int fd, |
705 | char *serial, char *serial_short, int len) | |
50be1401 | 706 | { |
912541b0 KS |
707 | int retval; |
708 | int i, j; | |
709 | unsigned char page_83[SCSI_INQ_BUFF_LEN]; | |
710 | ||
29804cc1 | 711 | memzero(page_83, SCSI_INQ_BUFF_LEN); |
912541b0 KS |
712 | retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN); |
713 | if (retval < 0) | |
714 | return 1; | |
715 | ||
716 | if (page_83[1] != PAGE_83) { | |
9f6445e3 | 717 | log_debug("%s: Invalid page 0x83", dev_scsi->kernel); |
912541b0 KS |
718 | return 1; |
719 | } | |
720 | /* | |
721 | * Model 4, 5, and (some) model 6 EMC Symmetrix devices return | |
722 | * a page 83 reply according to SCSI-2 format instead of SPC-2/3. | |
723 | * | |
724 | * The SCSI-2 page 83 format returns an IEEE WWN in binary | |
725 | * encoded hexi-decimal in the 16 bytes following the initial | |
726 | * 4-byte page 83 reply header. | |
727 | * | |
728 | * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part | |
729 | * of an Identification descriptor. The 3rd byte of the first | |
730 | * Identification descriptor is a reserved (BSZ) byte field. | |
731 | * | |
732 | * Reference the 7th byte of the page 83 reply to determine | |
733 | * whether the reply is compliant with SCSI-2 or SPC-2/3 | |
734 | * specifications. A zero value in the 7th byte indicates | |
735 | * an SPC-2/3 conformant reply, (i.e., the reserved field of the | |
736 | * first Identification descriptor). This byte will be non-zero | |
737 | * for a SCSI-2 conformant page 83 reply from these EMC | |
738 | * Symmetrix models since the 7th byte of the reply corresponds | |
739 | * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is, | |
740 | * 0x006048. | |
741 | */ | |
742 | if (page_83[6] == 0) | |
743 | return 2; | |
744 | ||
745 | serial[0] = hex_str[id_search_list[0].id_type]; | |
746 | /* | |
747 | * The first four bytes contain data, not a descriptor. | |
748 | */ | |
749 | i = 4; | |
750 | j = strlen(serial); | |
751 | /* | |
752 | * Binary descriptor, convert to ASCII, | |
753 | * using two bytes of ASCII for each byte | |
754 | * in the page_83. | |
755 | */ | |
756 | while (i < (page_83[3]+4)) { | |
757 | serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4]; | |
758 | serial[j++] = hex_str[page_83[i] & 0x0f]; | |
759 | i++; | |
760 | } | |
912541b0 | 761 | return 0; |
50be1401 EG |
762 | } |
763 | ||
01f950e2 | 764 | /* Get unit serial number VPD page */ |
7d563a17 | 765 | static int do_scsi_page80_inquiry(struct udev *udev, |
912541b0 KS |
766 | struct scsi_id_device *dev_scsi, int fd, |
767 | char *serial, char *serial_short, int max_len) | |
c521693b | 768 | { |
912541b0 KS |
769 | int retval; |
770 | int ser_ind; | |
771 | int i; | |
772 | int len; | |
773 | unsigned char buf[SCSI_INQ_BUFF_LEN]; | |
774 | ||
29804cc1 | 775 | memzero(buf, SCSI_INQ_BUFF_LEN); |
912541b0 KS |
776 | retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN); |
777 | if (retval < 0) | |
778 | return retval; | |
779 | ||
780 | if (buf[1] != PAGE_80) { | |
9f6445e3 | 781 | log_debug("%s: Invalid page 0x80", dev_scsi->kernel); |
912541b0 KS |
782 | return 1; |
783 | } | |
784 | ||
785 | len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3]; | |
786 | if (max_len < len) { | |
9f6445e3 | 787 | log_debug("%s: length %d too short - need %d", |
912541b0 KS |
788 | dev_scsi->kernel, max_len, len); |
789 | return 1; | |
790 | } | |
791 | /* | |
792 | * Prepend 'S' to avoid unlikely collision with page 0x83 vendor | |
793 | * specific type where we prepend '0' + vendor + model. | |
794 | */ | |
4e9fdfcc DZ |
795 | len = buf[3]; |
796 | if (serial != NULL) { | |
797 | serial[0] = 'S'; | |
798 | ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]); | |
799 | if (ser_ind < 0) | |
800 | return 1; | |
b929bf04 | 801 | ser_ind++; /* for the leading 'S' */ |
4e9fdfcc DZ |
802 | for (i = 4; i < len + 4; i++, ser_ind++) |
803 | serial[ser_ind] = buf[i]; | |
804 | } | |
805 | if (serial_short != NULL) { | |
806 | memcpy(serial_short, &buf[4], len); | |
807 | serial_short[len] = '\0'; | |
808 | } | |
912541b0 | 809 | return 0; |
c521693b GKH |
810 | } |
811 | ||
7d563a17 | 812 | int scsi_std_inquiry(struct udev *udev, |
912541b0 | 813 | struct scsi_id_device *dev_scsi, const char *devname) |
87cf9f5a | 814 | { |
912541b0 KS |
815 | int fd; |
816 | unsigned char buf[SCSI_INQ_BUFF_LEN]; | |
817 | struct stat statbuf; | |
818 | int err = 0; | |
819 | ||
c8a202b7 | 820 | fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC); |
912541b0 | 821 | if (fd < 0) { |
56f64d95 | 822 | log_debug_errno(errno, "scsi_id: cannot open %s: %m", devname); |
912541b0 KS |
823 | return 1; |
824 | } | |
825 | ||
826 | if (fstat(fd, &statbuf) < 0) { | |
56f64d95 | 827 | log_debug_errno(errno, "scsi_id: cannot stat %s: %m", devname); |
912541b0 KS |
828 | err = 2; |
829 | goto out; | |
830 | } | |
831 | sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev), | |
832 | minor(statbuf.st_rdev)); | |
833 | ||
29804cc1 | 834 | memzero(buf, SCSI_INQ_BUFF_LEN); |
912541b0 KS |
835 | err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN); |
836 | if (err < 0) | |
837 | goto out; | |
838 | ||
839 | err = 0; | |
840 | memcpy(dev_scsi->vendor, buf + 8, 8); | |
841 | dev_scsi->vendor[8] = '\0'; | |
842 | memcpy(dev_scsi->model, buf + 16, 16); | |
843 | dev_scsi->model[16] = '\0'; | |
844 | memcpy(dev_scsi->revision, buf + 32, 4); | |
845 | dev_scsi->revision[4] = '\0'; | |
846 | sprintf(dev_scsi->type,"%x", buf[0] & 0x1f); | |
87cf9f5a | 847 | |
24dabba5 | 848 | out: |
912541b0 KS |
849 | close(fd); |
850 | return err; | |
87cf9f5a HR |
851 | } |
852 | ||
7d563a17 | 853 | int scsi_get_serial(struct udev *udev, |
912541b0 KS |
854 | struct scsi_id_device *dev_scsi, const char *devname, |
855 | int page_code, int len) | |
c521693b | 856 | { |
912541b0 KS |
857 | unsigned char page0[SCSI_INQ_BUFF_LEN]; |
858 | int fd = -1; | |
859 | int cnt; | |
860 | int ind; | |
861 | int retval; | |
862 | ||
29804cc1 | 863 | memzero(dev_scsi->serial, len); |
ef309a68 | 864 | initialize_srand(); |
912541b0 KS |
865 | for (cnt = 20; cnt > 0; cnt--) { |
866 | struct timespec duration; | |
867 | ||
c8a202b7 | 868 | fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC); |
912541b0 KS |
869 | if (fd >= 0 || errno != EBUSY) |
870 | break; | |
871 | duration.tv_sec = 0; | |
872 | duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000); | |
873 | nanosleep(&duration, NULL); | |
874 | } | |
875 | if (fd < 0) | |
876 | return 1; | |
877 | ||
878 | if (page_code == PAGE_80) { | |
879 | if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) { | |
880 | retval = 1; | |
881 | goto completed; | |
882 | } else { | |
883 | retval = 0; | |
884 | goto completed; | |
885 | } | |
886 | } else if (page_code == PAGE_83) { | |
887 | if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) { | |
888 | retval = 1; | |
889 | goto completed; | |
890 | } else { | |
891 | retval = 0; | |
892 | goto completed; | |
893 | } | |
894 | } else if (page_code == PAGE_83_PRE_SPC3) { | |
895 | retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len); | |
896 | if (retval) { | |
897 | /* | |
898 | * Fallback to servicing a SPC-2/3 compliant page 83 | |
899 | * inquiry if the page 83 reply format does not | |
900 | * conform to pre-SPC3 expectations. | |
901 | */ | |
902 | if (retval == 2) { | |
903 | if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) { | |
904 | retval = 1; | |
905 | goto completed; | |
906 | } else { | |
907 | retval = 0; | |
908 | goto completed; | |
909 | } | |
910 | } | |
911 | else { | |
912 | retval = 1; | |
913 | goto completed; | |
914 | } | |
915 | } else { | |
916 | retval = 0; | |
917 | goto completed; | |
918 | } | |
919 | } else if (page_code != 0x00) { | |
9f6445e3 | 920 | log_debug("%s: unsupported page code 0x%d", dev_scsi->kernel, page_code); |
ab261e12 LN |
921 | retval = 1; |
922 | goto completed; | |
912541b0 KS |
923 | } |
924 | ||
925 | /* | |
926 | * Get page 0, the page of the pages. By default, try from best to | |
927 | * worst of supported pages: 0x83 then 0x80. | |
928 | */ | |
929 | if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) { | |
930 | /* | |
931 | * Don't try anything else. Black list if a specific page | |
932 | * should be used for this vendor+model, or maybe have an | |
933 | * optional fall-back to page 0x80 or page 0x83. | |
934 | */ | |
935 | retval = 1; | |
936 | goto completed; | |
937 | } | |
938 | ||
912541b0 KS |
939 | for (ind = 4; ind <= page0[3] + 3; ind++) |
940 | if (page0[ind] == PAGE_83) | |
941 | if (!do_scsi_page83_inquiry(udev, dev_scsi, fd, | |
942 | dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) { | |
943 | /* | |
944 | * Success | |
945 | */ | |
946 | retval = 0; | |
947 | goto completed; | |
948 | } | |
949 | ||
950 | for (ind = 4; ind <= page0[3] + 3; ind++) | |
951 | if (page0[ind] == PAGE_80) | |
952 | if (!do_scsi_page80_inquiry(udev, dev_scsi, fd, | |
953 | dev_scsi->serial, dev_scsi->serial_short, len)) { | |
954 | /* | |
955 | * Success | |
956 | */ | |
957 | retval = 0; | |
958 | goto completed; | |
959 | } | |
960 | retval = 1; | |
24dabba5 | 961 | |
c521693b | 962 | completed: |
912541b0 KS |
963 | close(fd); |
964 | return retval; | |
c521693b | 965 | } |