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1 /*
2 * Intel(R) Matrix Storage Manager hardware and firmware support routines
3 *
4 * Copyright (C) 2008 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19 #include "mdadm.h"
20 #include "platform-intel.h"
21 #include "probe_roms.h"
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <dirent.h>
27 #include <fcntl.h>
28 #include <sys/mman.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <limits.h>
32
33 static int devpath_to_ll(const char *dev_path, const char *entry,
34 unsigned long long *val);
35
36 static void free_sys_dev(struct sys_dev **list)
37 {
38 while (*list) {
39 struct sys_dev *next = (*list)->next;
40
41 if ((*list)->path)
42 free((*list)->path);
43 free(*list);
44 *list = next;
45 }
46 }
47
48 struct sys_dev *find_driver_devices(const char *bus, const char *driver)
49 {
50 /* search sysfs for devices driven by 'driver' */
51 char path[292];
52 char link[256];
53 char *c;
54 DIR *driver_dir;
55 struct dirent *de;
56 struct sys_dev *head = NULL;
57 struct sys_dev *list = NULL;
58 struct sys_dev *vmd = NULL;
59 enum sys_dev_type type;
60 unsigned long long dev_id;
61 unsigned long long class;
62
63 if (strcmp(driver, "isci") == 0)
64 type = SYS_DEV_SAS;
65 else if (strcmp(driver, "ahci") == 0)
66 type = SYS_DEV_SATA;
67 else if (strcmp(driver, "nvme") == 0) {
68 /* if looking for nvme devs, first look for vmd */
69 vmd = find_driver_devices("pci", "vmd");
70 type = SYS_DEV_NVME;
71 } else if (strcmp(driver, "vmd") == 0)
72 type = SYS_DEV_VMD;
73 else
74 type = SYS_DEV_UNKNOWN;
75
76 sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
77 driver_dir = opendir(path);
78 if (!driver_dir) {
79 if (vmd)
80 free_sys_dev(&vmd);
81 return NULL;
82 }
83 for (de = readdir(driver_dir); de; de = readdir(driver_dir)) {
84 int n;
85 int skip = 0;
86
87 /* is 'de' a device? check that the 'subsystem' link exists and
88 * that its target matches 'bus'
89 */
90 sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem",
91 bus, driver, de->d_name);
92 n = readlink(path, link, sizeof(link));
93 if (n < 0 || n >= (int)sizeof(link))
94 continue;
95 link[n] = '\0';
96 c = strrchr(link, '/');
97 if (!c)
98 continue;
99 if (strncmp(bus, c+1, strlen(bus)) != 0)
100 continue;
101
102 sprintf(path, "/sys/bus/%s/drivers/%s/%s",
103 bus, driver, de->d_name);
104
105 /* if searching for nvme - skip vmd connected one */
106 if (type == SYS_DEV_NVME) {
107 struct sys_dev *dev;
108 char *rp = realpath(path, NULL);
109 for (dev = vmd; dev; dev = dev->next) {
110 if ((strncmp(dev->path, rp, strlen(dev->path)) == 0))
111 skip = 1;
112 }
113 free(rp);
114 }
115
116 /* if it's not Intel device or mark as VMD connected - skip it. */
117 if (devpath_to_vendor(path) != 0x8086 || skip == 1)
118 continue;
119
120 if (devpath_to_ll(path, "device", &dev_id) != 0)
121 continue;
122
123 if (devpath_to_ll(path, "class", &class) != 0)
124 continue;
125
126 /* start / add list entry */
127 if (!head) {
128 head = xmalloc(sizeof(*head));
129 list = head;
130 } else {
131 list->next = xmalloc(sizeof(*head));
132 list = list->next;
133 }
134
135 if (!list) {
136 free_sys_dev(&head);
137 break;
138 }
139
140 list->dev_id = (__u16) dev_id;
141 list->class = (__u32) class;
142 list->type = type;
143 /* Each VMD device (domain) adds separate PCI bus, it is better to
144 * store path as a path to that bus (easier further determination which
145 * NVMe dev is connected to this particular VMD domain).
146 */
147 if (type == SYS_DEV_VMD) {
148 sprintf(path, "/sys/bus/%s/drivers/%s/%s/domain/device",
149 bus, driver, de->d_name);
150 }
151 list->path = realpath(path, NULL);
152 list->next = NULL;
153 if ((list->pci_id = strrchr(list->path, '/')) != NULL)
154 list->pci_id++;
155 }
156 closedir(driver_dir);
157
158 if (vmd) {
159 if (list)
160 list->next = vmd;
161 else
162 head = vmd;
163 }
164
165 return head;
166 }
167
168 static struct sys_dev *intel_devices=NULL;
169 static time_t valid_time = 0;
170
171 struct sys_dev *device_by_id(__u16 device_id)
172 {
173 struct sys_dev *iter;
174
175 for (iter = intel_devices; iter != NULL; iter = iter->next)
176 if (iter->dev_id == device_id)
177 return iter;
178 return NULL;
179 }
180
181 static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val)
182 {
183 char path[strlen(dev_path) + strlen(entry) + 2];
184 int fd;
185 int n;
186
187 sprintf(path, "%s/%s", dev_path, entry);
188
189 fd = open(path, O_RDONLY);
190 if (fd < 0)
191 return -1;
192 n = sysfs_fd_get_ll(fd, val);
193 close(fd);
194 return n;
195 }
196
197 __u16 devpath_to_vendor(const char *dev_path)
198 {
199 char path[strlen(dev_path) + strlen("/vendor") + 1];
200 char vendor[7];
201 int fd;
202 __u16 id = 0xffff;
203 int n;
204
205 sprintf(path, "%s/vendor", dev_path);
206
207 fd = open(path, O_RDONLY);
208 if (fd < 0)
209 return 0xffff;
210
211 n = read(fd, vendor, sizeof(vendor));
212 if (n == sizeof(vendor)) {
213 vendor[n - 1] = '\0';
214 id = strtoul(vendor, NULL, 16);
215 }
216 close(fd);
217
218 return id;
219 }
220
221 struct sys_dev *find_intel_devices(void)
222 {
223 struct sys_dev *ahci, *isci, *nvme;
224
225 if (valid_time > time(0) - 10)
226 return intel_devices;
227
228 if (intel_devices)
229 free_sys_dev(&intel_devices);
230
231 isci = find_driver_devices("pci", "isci");
232 ahci = find_driver_devices("pci", "ahci");
233 /* Searching for NVMe will return list of NVMe and VMD controllers */
234 nvme = find_driver_devices("pci", "nvme");
235
236 if (!isci && !ahci) {
237 ahci = nvme;
238 } else if (!ahci) {
239 ahci = isci;
240 struct sys_dev *elem = ahci;
241 while (elem->next)
242 elem = elem->next;
243 elem->next = nvme;
244 } else {
245 struct sys_dev *elem = ahci;
246 while (elem->next)
247 elem = elem->next;
248 elem->next = isci;
249 while (elem->next)
250 elem = elem->next;
251 elem->next = nvme;
252 }
253 intel_devices = ahci;
254 valid_time = time(0);
255 return intel_devices;
256 }
257
258 /*
259 * PCI Expansion ROM Data Structure Format */
260 struct pciExpDataStructFormat {
261 __u8 ver[4];
262 __u16 vendorID;
263 __u16 deviceID;
264 __u16 devListOffset;
265 __u16 pciDataStructLen;
266 __u8 pciDataStructRev;
267 } __attribute__ ((packed));
268
269 struct orom_entry *orom_entries;
270
271 const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id)
272 {
273 struct orom_entry *entry;
274 struct devid_list *devid;
275
276 for (entry = orom_entries; entry; entry = entry->next) {
277 for (devid = entry->devid_list; devid; devid = devid->next) {
278 if (devid->devid == dev_id)
279 return entry;
280 }
281 }
282
283 return NULL;
284 }
285
286 const struct imsm_orom *get_orom_by_device_id(__u16 dev_id)
287 {
288 const struct orom_entry *entry = get_orom_entry_by_device_id(dev_id);
289
290 if (entry)
291 return &entry->orom;
292
293 return NULL;
294 }
295
296 static struct orom_entry *add_orom(const struct imsm_orom *orom)
297 {
298 struct orom_entry *list;
299 struct orom_entry *prev = NULL;
300
301 for (list = orom_entries; list; prev = list, list = list->next)
302 ;
303
304 list = xmalloc(sizeof(struct orom_entry));
305 list->orom = *orom;
306 list->devid_list = NULL;
307 list->next = NULL;
308
309 if (prev == NULL)
310 orom_entries = list;
311 else
312 prev->next = list;
313
314 return list;
315 }
316
317 static void add_orom_device_id(struct orom_entry *entry, __u16 dev_id)
318 {
319 struct devid_list *list;
320 struct devid_list *prev = NULL;
321
322 for (list = entry->devid_list; list; prev = list, list = list->next) {
323 if (list->devid == dev_id)
324 return;
325 }
326 list = xmalloc(sizeof(struct devid_list));
327 list->devid = dev_id;
328 list->next = NULL;
329
330 if (prev == NULL)
331 entry->devid_list = list;
332 else
333 prev->next = list;
334 }
335
336 static int scan(const void *start, const void *end, const void *data)
337 {
338 int offset;
339 const struct imsm_orom *imsm_mem = NULL;
340 int len = (end - start);
341 struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;
342
343 if (data + 0x18 > end) {
344 dprintf("cannot find pciExpDataStruct \n");
345 return 0;
346 }
347
348 dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
349 (ulong) __le16_to_cpu(ptr->vendorID),
350 (ulong) __le16_to_cpu(ptr->deviceID));
351
352 if (__le16_to_cpu(ptr->vendorID) != 0x8086)
353 return 0;
354
355 for (offset = 0; offset < len; offset += 4) {
356 const void *mem = start + offset;
357
358 if ((memcmp(mem, IMSM_OROM_SIGNATURE, 4) == 0)) {
359 imsm_mem = mem;
360 break;
361 }
362 }
363
364 if (!imsm_mem)
365 return 0;
366
367 struct orom_entry *orom = add_orom(imsm_mem);
368
369 /* only PciDataStructure with revision 3 and above supports devices list. */
370 if (ptr->pciDataStructRev >= 3 && ptr->devListOffset) {
371 const __u16 *dev_list = (void *)ptr + ptr->devListOffset;
372 int i;
373
374 for (i = 0; dev_list[i] != 0; i++)
375 add_orom_device_id(orom, dev_list[i]);
376 } else {
377 add_orom_device_id(orom, __le16_to_cpu(ptr->deviceID));
378 }
379
380 return 0;
381 }
382
383 const struct imsm_orom *imsm_platform_test(struct sys_dev *hba)
384 {
385 struct imsm_orom orom = {
386 .signature = IMSM_OROM_SIGNATURE,
387 .rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
388 IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5,
389 .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
390 IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
391 IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB |
392 IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
393 IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB,
394 .dpa = IMSM_OROM_DISKS_PER_ARRAY,
395 .tds = IMSM_OROM_TOTAL_DISKS,
396 .vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
397 .vphba = IMSM_OROM_VOLUMES_PER_HBA
398 };
399 orom.attr = orom.rlc | IMSM_OROM_ATTR_ChecksumVerify;
400
401 if (check_env("IMSM_TEST_OROM_NORAID5")) {
402 orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
403 IMSM_OROM_RLC_RAID10;
404 }
405 if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba->type == SYS_DEV_SAS)) {
406 orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
407 IMSM_OROM_RLC_RAID10;
408 }
409 if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba->type == SYS_DEV_SATA)) {
410 orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
411 IMSM_OROM_RLC_RAID10;
412 }
413
414 struct orom_entry *ret = add_orom(&orom);
415
416 add_orom_device_id(ret, hba->dev_id);
417
418 return &ret->orom;
419 }
420
421 static const struct imsm_orom *find_imsm_hba_orom(struct sys_dev *hba)
422 {
423 unsigned long align;
424
425 if (check_env("IMSM_TEST_OROM"))
426 return imsm_platform_test(hba);
427
428 /* return empty OROM capabilities in EFI test mode */
429 if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI"))
430 return NULL;
431
432 find_intel_devices();
433
434 if (intel_devices == NULL)
435 return NULL;
436
437 /* scan option-rom memory looking for an imsm signature */
438 if (check_env("IMSM_SAFE_OROM_SCAN"))
439 align = 2048;
440 else
441 align = 512;
442 if (probe_roms_init(align) != 0)
443 return NULL;
444 probe_roms();
445 /* ignore return value - True is returned if both adapater roms are found */
446 scan_adapter_roms(scan);
447 probe_roms_exit();
448
449 return get_orom_by_device_id(hba->dev_id);
450 }
451
452 #define GUID_STR_MAX 37 /* according to GUID format:
453 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
454
455 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
456 ((struct efi_guid) \
457 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
458 (b) & 0xff, ((b) >> 8) & 0xff, \
459 (c) & 0xff, ((c) >> 8) & 0xff, \
460 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
461
462 #define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
463 #define SYS_EFIVARS_PATH "/sys/firmware/efi/efivars"
464 #define SCU_PROP "RstScuV"
465 #define AHCI_PROP "RstSataV"
466 #define AHCI_SSATA_PROP "RstsSatV"
467 #define AHCI_CSATA_PROP "RstCSatV"
468 #define VMD_PROP "RstUefiV"
469
470 #define VENDOR_GUID \
471 EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)
472
473 #define PCI_CLASS_RAID_CNTRL 0x010400
474
475 static int read_efi_var(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
476 {
477 char path[PATH_MAX];
478 char buf[GUID_STR_MAX];
479 int fd;
480 ssize_t n;
481
482 snprintf(path, PATH_MAX, "%s/%s-%s", SYS_EFIVARS_PATH, variable_name, guid_str(buf, guid));
483
484 fd = open(path, O_RDONLY);
485 if (fd < 0)
486 return 1;
487
488 /* read the variable attributes and ignore it */
489 n = read(fd, buf, sizeof(__u32));
490 if (n < 0) {
491 close(fd);
492 return 1;
493 }
494
495 /* read the variable data */
496 n = read(fd, buffer, buf_size);
497 close(fd);
498 if (n < buf_size)
499 return 1;
500
501 return 0;
502 }
503
504 static int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
505 {
506 char path[PATH_MAX];
507 char buf[GUID_STR_MAX];
508 int dfd;
509 ssize_t n, var_data_len;
510
511 /* Try to read the variable using the new efivarfs interface first.
512 * If that fails, fall back to the old sysfs-efivars interface. */
513 if (!read_efi_var(buffer, buf_size, variable_name, guid))
514 return 0;
515
516 snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
517
518 dprintf("EFI VAR: path=%s\n", path);
519 /* get size of variable data */
520 dfd = open(path, O_RDONLY);
521 if (dfd < 0)
522 return 1;
523
524 n = read(dfd, &buf, sizeof(buf));
525 close(dfd);
526 if (n < 0)
527 return 1;
528 buf[n] = '\0';
529
530 errno = 0;
531 var_data_len = strtoul(buf, NULL, 16);
532 if ((errno == ERANGE && (var_data_len == LONG_MAX))
533 || (errno != 0 && var_data_len == 0))
534 return 1;
535
536 /* get data */
537 snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
538
539 dprintf("EFI VAR: path=%s\n", path);
540 dfd = open(path, O_RDONLY);
541 if (dfd < 0)
542 return 1;
543
544 n = read(dfd, buffer, buf_size);
545 close(dfd);
546 if (n != var_data_len || n < buf_size) {
547 return 1;
548 }
549
550 return 0;
551 }
552
553 const struct imsm_orom *find_imsm_efi(struct sys_dev *hba)
554 {
555 struct imsm_orom orom;
556 struct orom_entry *ret;
557 int err;
558
559 if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI"))
560 return imsm_platform_test(hba);
561
562 /* OROM test is set, return that there is no EFI capabilities */
563 if (check_env("IMSM_TEST_OROM"))
564 return NULL;
565
566 if (hba->type == SYS_DEV_SATA && hba->class != PCI_CLASS_RAID_CNTRL)
567 return NULL;
568
569 err = read_efi_variable(&orom, sizeof(orom), hba->type == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID);
570
571 /* try to read variable for second AHCI controller */
572 if (err && hba->type == SYS_DEV_SATA)
573 err = read_efi_variable(&orom, sizeof(orom), AHCI_SSATA_PROP, VENDOR_GUID);
574
575 /* try to read variable for combined AHCI controllers */
576 if (err && hba->type == SYS_DEV_SATA) {
577 static struct orom_entry *csata;
578
579 err = read_efi_variable(&orom, sizeof(orom), AHCI_CSATA_PROP, VENDOR_GUID);
580 if (!err) {
581 if (!csata)
582 csata = add_orom(&orom);
583 add_orom_device_id(csata, hba->dev_id);
584 csata->type = hba->type;
585 return &csata->orom;
586 }
587 }
588
589 if (hba->type == SYS_DEV_VMD) {
590 err = read_efi_variable(&orom, sizeof(orom), VMD_PROP, VENDOR_GUID);
591 }
592
593 if (err)
594 return NULL;
595
596 ret = add_orom(&orom);
597 add_orom_device_id(ret, hba->dev_id);
598 ret->type = hba->type;
599
600 return &ret->orom;
601 }
602
603 const struct imsm_orom *find_imsm_nvme(struct sys_dev *hba)
604 {
605 static struct orom_entry *nvme_orom;
606
607 if (hba->type != SYS_DEV_NVME)
608 return NULL;
609
610 if (!nvme_orom) {
611 struct imsm_orom nvme_orom_compat = {
612 .signature = IMSM_NVME_OROM_COMPAT_SIGNATURE,
613 .rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
614 IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5,
615 .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
616 IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
617 IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB,
618 .dpa = IMSM_OROM_DISKS_PER_ARRAY_NVME,
619 .tds = IMSM_OROM_TOTAL_DISKS_NVME,
620 .vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
621 .vphba = IMSM_OROM_TOTAL_DISKS_NVME / 2 * IMSM_OROM_VOLUMES_PER_ARRAY,
622 .attr = IMSM_OROM_ATTR_2TB | IMSM_OROM_ATTR_2TB_DISK,
623 .driver_features = IMSM_OROM_CAPABILITIES_EnterpriseSystem
624 };
625 nvme_orom = add_orom(&nvme_orom_compat);
626 }
627 add_orom_device_id(nvme_orom, hba->dev_id);
628 nvme_orom->type = SYS_DEV_NVME;
629 return &nvme_orom->orom;
630 }
631
632 const struct imsm_orom *find_imsm_capability(struct sys_dev *hba)
633 {
634 const struct imsm_orom *cap = get_orom_by_device_id(hba->dev_id);
635
636 if (cap)
637 return cap;
638
639 if (hba->type == SYS_DEV_NVME)
640 return find_imsm_nvme(hba);
641 if ((cap = find_imsm_efi(hba)) != NULL)
642 return cap;
643 if ((cap = find_imsm_hba_orom(hba)) != NULL)
644 return cap;
645
646 return NULL;
647 }
648
649 char *devt_to_devpath(dev_t dev)
650 {
651 char device[46];
652
653 sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
654 return realpath(device, NULL);
655 }
656
657 char *diskfd_to_devpath(int fd)
658 {
659 /* return the device path for a disk, return NULL on error or fd
660 * refers to a partition
661 */
662 struct stat st;
663
664 if (fstat(fd, &st) != 0)
665 return NULL;
666 if (!S_ISBLK(st.st_mode))
667 return NULL;
668
669 return devt_to_devpath(st.st_rdev);
670 }
671
672 int path_attached_to_hba(const char *disk_path, const char *hba_path)
673 {
674 int rc;
675
676 if (check_env("IMSM_TEST_AHCI_DEV") ||
677 check_env("IMSM_TEST_SCU_DEV")) {
678 return 1;
679 }
680
681 if (!disk_path || !hba_path)
682 return 0;
683 dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
684 if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
685 rc = 1;
686 else
687 rc = 0;
688
689 return rc;
690 }
691
692 int devt_attached_to_hba(dev_t dev, const char *hba_path)
693 {
694 char *disk_path = devt_to_devpath(dev);
695 int rc = path_attached_to_hba(disk_path, hba_path);
696
697 if (disk_path)
698 free(disk_path);
699
700 return rc;
701 }
702
703 int disk_attached_to_hba(int fd, const char *hba_path)
704 {
705 char *disk_path = diskfd_to_devpath(fd);
706 int rc = path_attached_to_hba(disk_path, hba_path);
707
708 if (disk_path)
709 free(disk_path);
710
711 return rc;
712 }
713
714 char *vmd_domain_to_controller(struct sys_dev *hba, char *buf)
715 {
716 struct dirent *ent;
717 DIR *dir;
718 char path[PATH_MAX];
719
720 if (!hba)
721 return NULL;
722
723 if (hba->type != SYS_DEV_VMD)
724 return NULL;
725
726 dir = opendir("/sys/bus/pci/drivers/vmd");
727 if (!dir)
728 return NULL;
729
730 for (ent = readdir(dir); ent; ent = readdir(dir)) {
731 sprintf(path, "/sys/bus/pci/drivers/vmd/%s/domain/device",
732 ent->d_name);
733
734 if (!realpath(path, buf))
735 continue;
736
737 if (strncmp(buf, hba->path, strlen(buf)) == 0) {
738 sprintf(path, "/sys/bus/pci/drivers/vmd/%s", ent->d_name);
739 closedir(dir);
740 return realpath(path, buf);
741 }
742 }
743
744 closedir(dir);
745 return NULL;
746 }