X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=namedev.c;h=26c68fadf6ed9487ff576fb2bf962634cba398a5;hp=3843d028693c305b4bf0e15ae93f14e4b3589815;hb=d25e14ae1ef476fdc1d2b690b9426bd45bafd34e;hpb=f608f8ac16889ce0e7e800c7f11dacc558d097c1 diff --git a/namedev.c b/namedev.c index 3843d0286..26c68fadf 100644 --- a/namedev.c +++ b/namedev.c @@ -29,27 +29,20 @@ #include #include #include -#include #include #include -#include #include "libsysfs/sysfs/libsysfs.h" #include "list.h" #include "udev.h" -#include "udev_lib.h" +#include "udev_utils.h" #include "udev_version.h" #include "logging.h" #include "namedev.h" -#include "klibc_fixups.h" -#include "udevdb.h" +#include "udev_db.h" static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr); -LIST_HEAD(config_device_list); -LIST_HEAD(perm_device_list); - - /* compare string with pattern (supports * ? [0-9] [!A-Z]) */ static int strcmp_pattern(const char *p, const char *s) { @@ -103,44 +96,6 @@ static int strcmp_pattern(const char *p, const char *s) return 1; } -static struct perm_device *find_perm(char *name) -{ - struct perm_device *perm; - - list_for_each_entry(perm, &perm_device_list, node) { - if (strcmp_pattern(perm->name, name)) - continue; - return perm; - } - return NULL; -} - -static mode_t get_default_mode(void) -{ - mode_t mode = 0600; /* default to owner rw only */ - - if (strlen(default_mode_str) != 0) - mode = strtol(default_mode_str, NULL, 8); - - return mode; -} - -static char *get_default_owner(void) -{ - if (strlen(default_owner_str) == 0) - strfieldcpy(default_owner_str, "root"); - - return default_owner_str; -} - -static char *get_default_group(void) -{ - if (strlen(default_group_str) == 0) - strfieldcpy(default_group_str, "root"); - - return default_group_str; -} - /* extract possible {attr} and move str behind it */ static char *get_format_attribute(char **str) { @@ -186,29 +141,29 @@ static int get_format_len(char **str) * @param name Name to check for * @return 0 if didn't exist and N otherwise. */ -static unsigned int find_free_number (struct udevice *udev, char *name) +static int find_free_number(struct udevice *udev, const char *name) { - char temp[NAME_SIZE]; - char path[NAME_SIZE]; - struct udevice dev; - int result; + char filename[NAME_SIZE]; + int num = 0; + struct udevice db_udev; - /* have to sweep the database for each lookup */ - result = 0; - strncpy(temp, name, sizeof (temp)); + strfieldcpy(filename, name); while (1) { - if (udevdb_get_dev_byname(temp, path, &dev) != 0) - goto found; - /* symlink might be stale if $(udevroot) isn't cleaned; check - * on major/minor to see if it's the same device - */ - if (dev.major == udev->major && dev.minor == udev->minor) - goto found; - snprintf (temp, sizeof(temp), "%s%d", name, ++result); - } + dbg("look for existing node '%s'", filename); + memset(&db_udev, 0x00, sizeof(struct udevice)); + if (udev_db_get_device_byname(&db_udev, filename) != 0) { + dbg("free num=%d", num); + return num; + } -found: - return result; + num++; + if (num > 1000) { + info("find_free_number gone crazy (num=%d), aborted", num); + return -1; + } + snprintf(filename, NAME_SIZE, "%s%d", name, num); + filename[NAME_SIZE-1] = '\0'; + } } static void apply_format(struct udevice *udev, char *string, size_t maxsize, @@ -307,6 +262,17 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, dbg("sysfa attribute '%s' not found", attr); break; } + /* strip trailing whitespace of matching value */ + if (isspace(tmpattr->value[strlen(tmpattr->value)-1])) { + i = len = strlen(tmpattr->value); + while (i > 0 && isspace(tmpattr->value[i-1])) + i--; + if (i < len) { + tmpattr->value[i] = '\0'; + dbg("remove %i trailing whitespace chars from '%s'", + len - i, tmpattr->value); + } + } strfieldcatmax(string, tmpattr->value, maxsize); dbg("substitute sysfs value '%s'", tmpattr->value); } else { @@ -320,7 +286,7 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, case 'e': next_free_number = find_free_number(udev, string); if (next_free_number > 0) { - snprintf(temp2, sizeof(temp2), "%d", next_free_number); + sprintf(temp2, "%d", next_free_number); strfieldcatmax(string, temp2, maxsize); } break; @@ -336,69 +302,6 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, } } -/* - * Note, we can have multiple files for different busses in here due - * to the mess that USB has for its device tree... - */ -static struct bus_file { - char *bus; - char *file; -} bus_files[] = { - { .bus = "scsi", .file = "vendor" }, - { .bus = "usb", .file = "idVendor" }, - { .bus = "usb", .file = "iInterface" }, - { .bus = "usb-serial", .file = "detach_state" }, - { .bus = "ide", .file = "detach_state" }, - { .bus = "pci", .file = "vendor" }, - {} -}; - -#define SECONDS_TO_WAIT_FOR_FILE 10 -static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device) -{ - /* sleep until we see the file for this specific bus type show up this - * is needed because we can easily out-run the kernel in looking for - * these files before the paticular subsystem has created them in the - * sysfs tree properly. - * - * And people thought that the /sbin/hotplug event system was going to - * be slow, poo on you for arguing that before even testing it... - */ - struct bus_file *b = &bus_files[0]; - struct sysfs_attribute *tmpattr; - int found = 0; - int loop = SECONDS_TO_WAIT_FOR_FILE; - - while (1) { - if (b->bus == NULL) { - if (!found) - break; - /* sleep to give the kernel a chance to create the file */ - sleep(1); - --loop; - if (loop == 0) - break; - b = &bus_files[0]; - } - if (strcmp(sysfs_device->bus, b->bus) == 0) { - found = 1; - dbg("looking for file '%s' on bus '%s'", b->file, b->bus); - tmpattr = sysfs_get_device_attr(sysfs_device, b->file); - if (tmpattr) { - /* found it! */ - goto exit; - } - dbg("can't find '%s' file", b->file); - } - ++b; - } - if (!found) - dbg("did not find bus type '%s' on list of bus_id_files, " - "contact greg@kroah.com", sysfs_device->bus); -exit: - return; /* here to prevent compiler warning... */ -} - static void fix_kernel_name(struct udevice *udev) { char *temp = udev->kernel_name; @@ -412,7 +315,7 @@ static void fix_kernel_name(struct udevice *udev) } } -static int execute_program(const char *path, char *value, int len) +static int execute_program(struct udevice *udev, const char *path, char *value, int len) { int retval; int count; @@ -445,16 +348,11 @@ static int execute_program(const char *path, char *value, int len) dbg("execute '%s' with parsed arguments", arg); } else { argv[0] = arg; - argv[1] = main_argv[1]; + argv[1] = udev->subsystem; argv[2] = NULL; dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]); } - /* set basename() only */ - pos = strrchr(argv[0], '/'); - if (pos != NULL) - argv[0] = &pos[1]; - retval = pipe(fds); if (retval != 0) { dbg("pipe failed"); @@ -503,7 +401,7 @@ static int execute_program(const char *path, char *value, int len) dbg("result is '%s'", value); close(fds[0]); - wait(&status); + waitpid(pid, &status, 0); if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { dbg("exec program status 0x%x", status); @@ -645,114 +543,8 @@ static int match_place(struct config_device *dev, struct sysfs_class_device *cla return 0; } -static int whitelist_search(struct sysfs_class_device *class_dev) -{ - char *sysblock = "/sys/block"; - int i; - - static char *list[] = { - "nb", - "ram", - "loop", - "fd", - "md", - "dos_cd", - "double", - "flash", - "msd", - "rflash", - "rom", - "rrom", - "sbpcd", - "pcd", - "pf", - "scd", - "ubd", - NULL, - }; - - if (strncmp(class_dev->path, sysblock, strlen(sysblock))) - return 0; - - for (i=0; list[i] != NULL; i++) - if (!strncmp(class_dev->name, list[i], strlen(list[i]))) - return 1; - - return 0; -} - -static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev) -{ - struct sysfs_device *sysfs_device; - struct sysfs_class_device *class_dev_parent; - struct timespec tspec; - int loop; - - /* Figure out where the device symlink is at. For char devices this will - * always be in the class_dev->path. But for block devices, it's different. - * The main block device will have the device symlink in it's path, but - * all partitions have the symlink in its parent directory. - * But we need to watch out for block devices that do not have parents, yet - * look like a partition (fd0, loop0, etc.) They all do not have a device - * symlink yet. We do sit and spin on waiting for them right now unless - * they happen to be in the whitelist in which case we exit. - */ - class_dev_parent = sysfs_get_classdev_parent(class_dev); - if (class_dev_parent != NULL) - dbg("given class device has a parent, use this instead"); - - tspec.tv_sec = 0; - tspec.tv_nsec = 10000000; /* sleep 10 millisec */ - loop = 10; - while (loop--) { - if (udev_sleep) { - if (whitelist_search(class_dev)) { - sysfs_device = NULL; - goto exit; - } - nanosleep(&tspec, NULL); - } - - if (class_dev_parent) - sysfs_device = sysfs_get_classdev_device(class_dev_parent); - else - sysfs_device = sysfs_get_classdev_device(class_dev); - if (sysfs_device != NULL) - goto device_found; - } - dbg("timed out waiting for device symlink, continuing on anyway..."); - -device_found: - /* We have another issue with just the wait above - the sysfs part of - * the kernel may not be quick enough to have created the link to the - * device under the "bus" subsystem. Due to this, the sysfs_device->bus - * will not contain the actual bus name :( - */ - if (sysfs_device) { - if (sysfs_device->bus[0] != '\0') - goto bus_found; - - loop = 10; - tspec.tv_nsec = 10000000; - while (loop--) { - if (udev_sleep) - nanosleep(&tspec, NULL); - sysfs_get_device_bus(sysfs_device); - - if (sysfs_device->bus[0] != '\0') - goto bus_found; - } - dbg("timed out waiting to find the device bus, continuing on anyway"); - goto exit; -bus_found: - dbg("device %s is registered with bus '%s'", - sysfs_device->name, sysfs_device->bus); - } -exit: - return sysfs_device; -} - -static int match_rule(struct config_device *dev, struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device) +static int match_rule(struct udevice *udev, struct config_device *dev, + struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device) { while (1) { /* check for matching bus value */ @@ -761,7 +553,8 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas dbg("device has no bus"); goto try_parent; } - dbg("check for " FIELD_BUS " dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus); + dbg("check for " FIELD_BUS " dev->bus='%s' sysfs_device->bus='%s'", + dev->bus, sysfs_device->bus); if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) { dbg(FIELD_BUS " is not matching"); goto try_parent; @@ -770,9 +563,10 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas } } - /* check for matching kernel name*/ + /* check for matching kernel name */ if (dev->kernel[0] != '\0') { - dbg("check for " FIELD_KERNEL " dev->kernel='%s' class_dev->name='%s'", dev->kernel, class_dev->name); + dbg("check for " FIELD_KERNEL " dev->kernel='%s' class_dev->name='%s'", + dev->kernel, class_dev->name); if (strcmp_pattern(dev->kernel, class_dev->name) != 0) { dbg(FIELD_KERNEL " is not matching"); goto try_parent; @@ -781,6 +575,30 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas } } + /* check for matching subsystem */ + if (dev->subsystem[0] != '\0') { + dbg("check for " FIELD_SUBSYSTEM " dev->subsystem='%s' class_dev->name='%s'", + dev->subsystem, class_dev->name); + if (strcmp_pattern(dev->subsystem, udev->subsystem) != 0) { + dbg(FIELD_SUBSYSTEM " is not matching"); + goto try_parent; + } else { + dbg(FIELD_SUBSYSTEM " matches"); + } + } + + /* check for matching driver */ + if (dev->driver[0] != '\0') { + dbg("check for " FIELD_DRIVER " dev->driver='%s' sysfs_device->driver_name='%s'", + dev->driver, sysfs_device->driver_name); + if (strcmp_pattern(dev->driver, sysfs_device->driver_name) != 0) { + dbg(FIELD_DRIVER " is not matching"); + goto try_parent; + } else { + dbg(FIELD_DRIVER " matches"); + } + } + /* check for matching bus id */ if (dev->id[0] != '\0') { dbg("check " FIELD_ID); @@ -821,7 +639,7 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas dbg("check " FIELD_PROGRAM); strfieldcpy(program, dev->program); apply_format(udev, program, sizeof(program), class_dev, sysfs_device); - if (execute_program(program, udev->program_result, NAME_SIZE) != 0) { + if (execute_program(udev, program, udev->program_result, NAME_SIZE) != 0) { dbg(FIELD_PROGRAM " returned nonzero"); goto try_parent; } else { @@ -831,8 +649,7 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas /* check for matching result of external program */ if (dev->result[0] != '\0') { - dbg("check for " FIELD_RESULT - " dev->result='%s', udev->program_result='%s'", + dbg("check for " FIELD_RESULT " dev->result='%s', udev->program_result='%s'", dev->result, udev->program_result); if (strcmp_pattern(dev->result, udev->program_result) != 0) { dbg(FIELD_RESULT " is not matching"); @@ -852,31 +669,37 @@ try_parent: return -ENODEV; dbg("sysfs_device->path='%s'", sysfs_device->path); dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); - dbg("sysfs_device->bus='%s'", sysfs_device->bus); } } -int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev) +int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_dev) { + struct sysfs_class_device *class_dev_parent; struct sysfs_device *sysfs_device = NULL; struct config_device *dev; - struct perm_device *perm; - struct sysinfo info; char *pos; - udev->mode = 0; + dbg("class_dev->name='%s'", class_dev->name); + + /* Figure out where the "device"-symlink is at. For char devices this will + * always be in the class_dev->path. On block devices, only the main block + * device will have the device symlink in it's path. All partition devices + * need to look at the symlink in its parent directory. + */ + class_dev_parent = sysfs_get_classdev_parent(class_dev); + if (class_dev_parent != NULL) { + dbg("given class device has a parent, use this instead"); + sysfs_device = sysfs_get_classdev_device(class_dev_parent); + } else { + sysfs_device = sysfs_get_classdev_device(class_dev); + } - /* find the sysfs_device associated with this class device */ - sysfs_device = get_sysfs_device(class_dev); if (sysfs_device) { - dbg("sysfs_device->path='%s'", sysfs_device->path); - dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id); - dbg("sysfs_device->bus='%s'", sysfs_device->bus); + dbg("found devices device: path='%s', bus_id='%s', bus='%s'", + sysfs_device->path, sysfs_device->bus_id, sysfs_device->bus); strfieldcpy(udev->bus_id, sysfs_device->bus_id); - wait_for_device_to_initialize(sysfs_device); } - dbg("class_dev->name = '%s'", class_dev->name); strfieldcpy(udev->kernel_name, class_dev->name); fix_kernel_name(udev); @@ -892,17 +715,37 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud /* look for a matching rule to apply */ list_for_each_entry(dev, &config_device_list, node) { dbg("process rule"); - if (match_rule(dev, class_dev, udev, sysfs_device) == 0) { + if (match_rule(udev, dev, class_dev, sysfs_device) == 0) { if (dev->name[0] == '\0' && dev->symlink[0] == '\0') { - info("configured rule in '%s' at line %i applied, '%s' is ignored", - dev->config_file, dev->config_line, udev->kernel_name); - return -1; + /* empty name, symlink, perms will not create any node */ + if (dev->mode == 0000 && dev->owner[0] == '\0' && dev->group[0] == '\0') { + info("configured rule in '%s[%i]' applied, '%s' is ignored", + dev->config_file, dev->config_line, udev->kernel_name); + return -1; + } + + /* apply permissions only rule values */ + if (dev->mode != 0000) { + udev->mode = dev->mode; + dbg("applied mode=%#o to '%s'", udev->mode, udev->kernel_name); + } + if (dev->owner[0] != '\0') { + strfieldcpy(udev->owner, dev->owner); + apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device); + dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name); + } + if (dev->group[0] != '\0') { + strfieldcpy(udev->group, dev->group); + apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device); + dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name); + } } + /* collect symlinks for the final matching rule */ if (dev->symlink[0] != '\0') { char temp[NAME_SIZE]; - info("configured rule in '%s' at line %i applied, added symlink '%s'", + info("configured rule in '%s[%i]' applied, added symlink '%s'", dev->config_file, dev->config_line, dev->symlink); strfieldcpy(temp, dev->symlink); apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device); @@ -911,78 +754,49 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud strfieldcat(udev->symlink, temp); } + /* rule matches */ if (dev->name[0] != '\0') { /* apply all_partitions flag only at a main block device */ if (dev->partitions > 0 && (udev->type != 'b' || udev->kernel_number[0] != '\0')) continue; - info("configured rule in '%s' at line %i applied, '%s' becomes '%s'", + info("configured rule in '%s[%i]' applied, '%s' becomes '%s'", dev->config_file, dev->config_line, udev->kernel_name, dev->name); + strfieldcpy(udev->name, dev->name); - goto found; + apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device); + strfieldcpy(udev->config_file, dev->config_file); + udev->config_line = dev->config_line; + udev->ignore_remove = dev->ignore_remove; + + if (udev->type == 'n') + goto exit; + + udev->partitions = dev->partitions; + if (dev->mode != 0000) + udev->mode = dev->mode; + if (dev->owner[0] != '\0') { + strfieldcpy(udev->owner, dev->owner); + apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device); + } + if (dev->group[0] != '\0') { + strfieldcpy(udev->group, dev->group); + apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device); + } + + dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o", + udev->name, udev->owner, udev->group, udev->mode); + + goto exit; } } } - /* no rule was found so we use the kernel name */ - strfieldcpy(udev->name, udev->kernel_name); - if (udev->type == 'n') - goto done; - else - goto perms; - -found: - apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device); - strfieldcpy(udev->config_file, dev->config_file); - udev->config_line = dev->config_line; - - if (udev->type == 'n') - goto done; - - udev->partitions = dev->partitions; - - /* get permissions given in rule */ - set_empty_perms(udev, dev->mode, - dev->owner, - dev->group); - -perms: - /* get permissions given in config file or set defaults */ - perm = find_perm(udev->name); - if (perm != NULL) { - set_empty_perms(udev, perm->mode, - perm->owner, - perm->group); - } else { - set_empty_perms(udev, get_default_mode(), - get_default_owner(), - get_default_group()); - } - - dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o", - udev->name, udev->owner, udev->group, udev->mode); -done: - /* store time of action */ - sysinfo(&info); - udev->config_uptime = info.uptime; + /* no rule matched, so we use the kernel name */ + strfieldcpy(udev->name, udev->kernel_name); + dbg("no rule found, use kernel name '%s'", udev->name); +exit: return 0; } - -int namedev_init(void) -{ - int retval; - - retval = namedev_init_rules(); - if (retval) - return retval; - - retval = namedev_init_permissions(); - if (retval) - return retval; - - dump_config_dev_list(); - dump_perm_dev_list(); - return retval; -}