6 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 #include "udev_version.h"
39 #include "libsysfs/libsysfs.h"
40 #include "klibc_fixups.h"
42 LIST_HEAD(config_device_list);
43 LIST_HEAD(perm_device_list);
45 /* compare string with pattern (supports * ? [0-9] [!A-Z]) */
46 static int strcmp_pattern(const char *p, const char *s)
62 while (*p && (*p != ']')) {
65 if ((*s >= *p) && (*s <= p[2]))
73 while (*p && (*p != ']'))
75 return strcmp_pattern(p+1, s+1);
81 if (strcmp_pattern(p, s+1))
82 return strcmp_pattern(p+1, s);
90 if ((*p == *s) || (*p == '?'))
91 return strcmp_pattern(p+1, s+1);
97 #define copy_var(a, b, var) \
101 #define copy_string(a, b, var) \
102 if (strlen(b->var)) \
103 strcpy(a->var, b->var);
105 int add_perm_dev(struct perm_device *new_dev)
107 struct perm_device *dev;
108 struct perm_device *tmp_dev;
110 /* update the values if we already have the device */
111 list_for_each_entry(dev, &perm_device_list, node) {
112 if (strcmp_pattern(new_dev->name, dev->name))
114 copy_var(dev, new_dev, mode);
115 copy_string(dev, new_dev, owner);
116 copy_string(dev, new_dev, group);
120 /* not found, add new structure to the perm list */
121 tmp_dev = malloc(sizeof(*tmp_dev));
124 memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
125 list_add_tail(&tmp_dev->node, &perm_device_list);
126 //dump_perm_dev(tmp_dev);
130 static struct perm_device *find_perm(char *name)
132 struct perm_device *perm;
134 list_for_each_entry(perm, &perm_device_list, node) {
135 if (strcmp_pattern(perm->name, name))
142 static mode_t get_default_mode(struct sysfs_class_device *class_dev)
144 mode_t mode = 0600; /* default to owner rw only */
146 if (strlen(default_mode_str) != 0) {
147 mode = strtol(default_mode_str, NULL, 8);
152 static void apply_format(struct udevice *udev, unsigned char *string)
154 char name[NAME_SIZE];
155 char temp[NAME_SIZE];
164 pos = strchr(string, '%');
169 if (isdigit(tail[0])) {
170 num = (int) strtoul(&pos[1], &tail, 10);
172 dbg("format parsing error '%s'", pos+1);
176 strfieldcpy(name, tail+1);
180 if (strlen(udev->bus_id) == 0)
182 strcat(pos, udev->bus_id);
183 dbg("substitute bus_id '%s'", udev->bus_id);
186 if (strlen(udev->kernel_name) == 0)
188 strcat(pos, udev->kernel_name);
189 dbg("substitute kernel name '%s'", udev->kernel_name);
192 if (strlen(udev->kernel_number) == 0)
194 strcat(pos, udev->kernel_number);
195 dbg("substitute kernel number '%s'", udev->kernel_number);
198 if (strlen(udev->kernel_number) == 0) {
200 dbg("substitute devfs disc");
204 strcat(pos, udev->kernel_number);
205 dbg("substitute devfs part '%s'", udev->kernel_number);
208 sprintf(pos, "%u", udev->minor);
209 dbg("substitute minor number '%u'", udev->minor);
212 sprintf(pos, "%u", udev->major);
213 dbg("substitute major number '%u'", udev->major);
216 if (strlen(udev->callout_value) == 0)
219 /* get part of return string */
220 strncpy(temp, udev->callout_value, sizeof(temp));
224 pos3 = strsep(&pos2, " ");
226 dbg("requested part of callout string not found");
232 dbg("substitute partial callout output '%s'", pos3);
235 strcat(pos, udev->callout_value);
236 dbg("substitute callout output '%s'", udev->callout_value);
240 dbg("unknown substitution type '%%%c'", pos[1]);
243 strcat(string, name);
249 static struct bus_file {
253 { .bus = "scsi", .file = "vendor" },
254 { .bus = "usb", .file = "idVendor" },
255 { .bus = "ide", .file = "detach_state" },
256 { .bus = "pci", .file = "vendor" },
260 #define SECONDS_TO_WAIT_FOR_FILE 10
261 static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device)
263 /* sleep until we see the file for this specific bus type show up this
264 * is needed because we can easily out-run the kernel in looking for
265 * these files before the paticular subsystem has created them in the
266 * sysfs tree properly.
268 * And people thought that the /sbin/hotplug event system was going to
269 * be slow, poo on you for arguing that before even testing it...
271 struct bus_file *b = &bus_files[0];
272 struct sysfs_attribute *tmpattr;
278 if (strcmp(sysfs_device->bus, b->bus) == 0) {
280 loop = SECONDS_TO_WAIT_FOR_FILE;
282 dbg("looking for file '%s' on bus '%s'", b->file, b->bus);
283 tmpattr = sysfs_get_device_attr(sysfs_device, b->file);
288 /* sleep to give the kernel a chance to create the file */
291 dbg("Timed out waiting for '%s' file, continuing on anyway...", b->file);
296 dbg("Did not find bus type '%s' on list of bus_id_files, contact greg@kroah.com", sysfs_device->bus);
298 return; /* here to prevent compiler warning... */
301 static int exec_callout(struct config_device *dev, char *value, int len)
311 char *args[CALLOUT_MAXARG];
314 dbg("callout to '%s'", dev->exec_program);
328 close(STDOUT_FILENO);
329 dup(fds[1]); /* dup write side of pipe to STDOUT */
330 if (strchr(dev->exec_program, ' ')) {
331 /* callout with arguments */
332 pos = dev->exec_program;
333 for (i=0; i < CALLOUT_MAXARG-1; i++) {
334 args[i] = strsep(&pos, " ");
339 dbg("too many args - %d", i);
342 retval = execve(args[0], args, main_envp);
344 retval = execve(dev->exec_program, main_argv, main_envp);
347 dbg("child execve failed");
350 return -1; /* avoid compiler warning */
352 /* parent reads from fds[0] */
356 res = read(fds[0], buffer, sizeof(buffer) - 1);
361 dbg("callout len %d too short", len);
365 dbg("callout value already set");
369 strncpy(value, buffer, len);
370 pos = value + strlen(value)-1;
373 dbg("callout returned '%s'", value);
379 dbg("wait failed result %d", res);
384 if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
385 dbg("callout program status 0x%x", status);
393 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
395 struct config_device *dev;
397 list_for_each_entry(dev, &config_device_list, node) {
398 if (dev->type != CALLOUT)
401 if (dev->bus[0] != '\0') {
402 /* as the user specified a bus, we must match it up */
405 dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
406 if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
410 /* substitute anything that needs to be in the program name */
411 apply_format(udev, dev->exec_program);
412 if (exec_callout(dev, udev->callout_value, NAME_SIZE))
414 if (strcmp_pattern(dev->id, udev->callout_value) != 0)
416 strfieldcpy(udev->name, dev->name);
417 strfieldcpy(udev->symlink, dev->symlink);
418 dbg("callout returned matching value '%s', '%s' becomes '%s'",
419 dev->id, class_dev->name, udev->name);
425 static int match_pair(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair)
427 struct sysfs_attribute *tmpattr = NULL;
430 if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0'))
433 dbg("look for device attribute '%s'", pair->file);
434 /* try to find the attribute in the class device directory */
435 tmpattr = sysfs_get_classdev_attr(class_dev, pair->file);
439 /* look in the class device directory if present */
441 tmpattr = sysfs_get_device_attr(sysfs_device, pair->file);
449 c = tmpattr->value + strlen(tmpattr->value)-1;
452 dbg("compare attribute '%s' value '%s' with '%s'",
453 pair->file, tmpattr->value, pair->value);
454 if (strcmp_pattern(pair->value, tmpattr->value) != 0)
457 dbg("found matching attribute '%s' with value '%s'",
458 pair->file, pair->value);
462 static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
464 struct sysfs_pair *pair;
465 struct config_device *dev;
469 list_for_each_entry(dev, &config_device_list, node) {
470 if (dev->type != LABEL)
473 if (dev->bus[0] != '\0') {
474 /* as the user specified a bus, we must match it up */
477 dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
478 if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
483 for (i = 0; i < MAX_SYSFS_PAIRS; ++i) {
484 pair = &dev->sysfs_pair[i];
485 if ((pair->file[0] == '\0') || (pair->value[0] == '\0'))
487 if (match_pair(class_dev, sysfs_device, pair) != 0) {
496 strfieldcpy(udev->name, dev->name);
497 strfieldcpy(udev->symlink, dev->symlink);
498 dbg("found matching attribute, '%s' becomes '%s' ",
499 class_dev->name, udev->name);
506 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
508 struct config_device *dev;
509 char path[SYSFS_PATH_MAX];
513 /* we have to have a sysfs device for NUMBER to work */
517 list_for_each_entry(dev, &config_device_list, node) {
518 if (dev->type != NUMBER)
521 dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
522 if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
526 strfieldcpy(path, sysfs_device->path);
527 temp = strrchr(path, '/');
528 dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
529 if (strstr(temp, dev->id) != NULL) {
533 temp = strrchr(path, '/');
534 dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
535 if (strstr(temp, dev->id) != NULL)
540 strfieldcpy(udev->name, dev->name);
541 strfieldcpy(udev->symlink, dev->symlink);
542 dbg("found matching id '%s', '%s' becomes '%s'",
543 dev->id, class_dev->name, udev->name);
549 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
551 struct config_device *dev;
552 char path[SYSFS_PATH_MAX];
556 /* we have to have a sysfs device for TOPOLOGY to work */
560 list_for_each_entry(dev, &config_device_list, node) {
561 if (dev->type != TOPOLOGY)
564 dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
565 if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
569 strfieldcpy(path, sysfs_device->path);
570 temp = strrchr(path, '/');
571 dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
572 if (strstr(temp, dev->place) != NULL) {
576 temp = strrchr(path, '/');
577 dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
578 if (strstr(temp, dev->place) != NULL)
584 strfieldcpy(udev->name, dev->name);
585 strfieldcpy(udev->symlink, dev->symlink);
586 dbg("found matching place '%s', '%s' becomes '%s'",
587 dev->place, class_dev->name, udev->name);
593 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
595 struct config_device *dev;
597 list_for_each_entry(dev, &config_device_list, node) {
598 if (dev->type != REPLACE)
601 dbg("compare name '%s' with '%s'", dev->kernel_name, class_dev->name);
602 if (strcmp_pattern(dev->kernel_name, class_dev->name) != 0)
605 strfieldcpy(udev->name, dev->name);
606 strfieldcpy(udev->symlink, dev->symlink);
607 dbg("found name, '%s' becomes '%s'", dev->kernel_name, udev->name);
614 static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
616 /* heh, this is pretty simple... */
617 strfieldcpy(udev->name, class_dev->name);
620 static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev)
622 struct sysfs_device *sysfs_device;
623 struct sysfs_class_device *class_dev_parent;
625 char filename[SYSFS_PATH_MAX + 6];
630 /* Figure out where the device symlink is at. For char devices this will
631 * always be in the class_dev->path. But for block devices, it's different.
632 * The main block device will have the device symlink in it's path, but
633 * all partitions have the symlink in its parent directory.
634 * But we need to watch out for block devices that do not have parents, yet
635 * look like a partition (fd0, loop0, etc.) They all do not have a device
636 * symlink yet. We do sit and spin on waiting for them right now, we should
637 * possibly have a whitelist for these devices here...
639 strcpy(filename, class_dev->path);
640 dbg("filename = %s", filename);
641 if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
642 if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
643 temp = strrchr(filename, '/');
645 char *temp2 = strrchr(filename, '/');
648 dbg("temp2 = %s", temp2);
649 if (temp2 && (strcmp(temp2, "/block") == 0)) {
650 /* oops, we have no parent block device, so go back to original directory */
651 strcpy(filename, class_dev->path);
657 strcat(filename, "/device");
662 dbg("looking for '%s'", filename);
663 retval = stat(filename, &buf);
666 /* sleep to give the kernel a chance to create the device file */
670 loop = 1; /* FIXME put a real value in here for when everything is fixed... */
672 /* find the sysfs_device for this class device */
673 /* Wouldn't it really be nice if libsysfs could do this for us? */
674 sysfs_device = sysfs_get_classdev_device(class_dev);
675 if (sysfs_device != NULL)
678 /* if it's a partition, we need to get the parent device */
680 /* FIXME HACK HACK HACK HACK
681 * for some reason partitions need this extra sleep here, in order
682 * to wait for the device properly. Once the libsysfs code is
683 * fixed properly, this sleep should go away, and we can just loop above.
686 dbg("really is a partition");
687 class_dev_parent = sysfs_get_classdev_parent(class_dev);
688 if (class_dev_parent == NULL) {
689 dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
691 dbg("class_dev_parent->name='%s'", class_dev_parent->name);
692 sysfs_device = sysfs_get_classdev_device(class_dev_parent);
693 if (sysfs_device != NULL)
697 /* sleep to give the kernel a chance to create the link */
698 /* FIXME remove comment...
701 dbg("Timed out waiting for device symlink, continuing on anyway...");
706 int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
708 struct sysfs_device *sysfs_device = NULL;
710 struct perm_device *perm;
715 /* find the sysfs_device associated with this class device */
716 sysfs_device = get_sysfs_device(class_dev);
718 dbg("sysfs_device->path='%s'", sysfs_device->path);
719 dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
720 dbg("sysfs_device->bus='%s'", sysfs_device->bus);
721 strfieldcpy(udev->bus_id, sysfs_device->bus_id);
722 wait_for_device_to_initialize(sysfs_device);
724 dbg("class_dev->name = '%s'", class_dev->name);
727 strfieldcpy(udev->kernel_name, class_dev->name);
729 /* get kernel number */
730 pos = class_dev->name + strlen(class_dev->name);
731 while (isdigit(*(pos-1)))
733 strfieldcpy(udev->kernel_number, pos);
734 dbg("kernel_number='%s'", udev->kernel_number);
736 /* rules are looked at in priority order */
737 retval = do_callout(class_dev, udev, sysfs_device);
741 retval = do_label(class_dev, udev, sysfs_device);
745 retval = do_number(class_dev, udev, sysfs_device);
749 retval = do_topology(class_dev, udev, sysfs_device);
753 retval = do_replace(class_dev, udev, sysfs_device);
757 do_kernelname(class_dev, udev);
761 /* substitute placeholder */
762 apply_format(udev, udev->name);
763 apply_format(udev, udev->symlink);
766 perm = find_perm(udev->name);
768 udev->mode = perm->mode;
769 strfieldcpy(udev->owner, perm->owner);
770 strfieldcpy(udev->group, perm->group);
772 /* no matching perms found :( */
773 udev->mode = get_default_mode(class_dev);
774 udev->owner[0] = 0x00;
775 udev->group[0] = 0x00;
777 dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
778 udev->name, udev->owner, udev->group, udev->mode);
783 int namedev_init(void)
787 retval = namedev_init_rules();
791 retval = namedev_init_permissions();
795 dump_config_dev_list();
796 dump_perm_dev_list();