X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=namedev.c;h=bbc5b40069d552179c90768417827e6adb3a0bfb;hp=dca405ceba1d041be35f08e612f26e1ce4acf937;hb=82b1698314f004b9d69a14c5054e5f7699aa33ad;hpb=8a0dc204e902a47a5b251c6d4a29eddb8f4a634a diff --git a/namedev.c b/namedev.c index dca405ceb..bbc5b4006 100644 --- a/namedev.c +++ b/namedev.c @@ -31,12 +31,11 @@ #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" @@ -44,10 +43,6 @@ 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) { @@ -101,44 +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) { @@ -226,6 +183,7 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, int slen; struct sysfs_attribute *tmpattr; unsigned int next_free_number; + struct sysfs_class_device *class_dev_parent; pos = string; while (1) { @@ -244,6 +202,12 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, switch (c) { + case 'p': + if (strlen(udev->devpath) == 0) + break; + strfieldcatmax(string, udev->devpath, maxsize); + dbg("substitute kernel name '%s'", udev->kernel_name); + break; case 'b': if (strlen(udev->bus_id) == 0) break; @@ -333,6 +297,35 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize, strfieldcatmax(string, temp2, maxsize); } break; + case 'P': + class_dev_parent = sysfs_get_classdev_parent(class_dev); + if (class_dev_parent != NULL) { + struct udevice udev_parent; + + dbg("found parent '%s', get the node name", class_dev_parent->path); + memset(&udev_parent, 0x00, sizeof(struct udevice)); + /* lookup the name in the udev_db with the DEVPATH of the parent */ + strfieldcpy(udev_parent.devpath, &class_dev_parent->path[strlen(sysfs_path)]); + if (udev_db_get_device(&udev_parent) == 0) { + strfieldcatmax(string, udev_parent.name, maxsize); + dbg("substitute parent node name'%s'", udev_parent.name); + } else + dbg("parent not found in database"); + } + break; + case 'N': + if (udev->tmp_node[0] == '\0') { + dbg("create temporary device node for callout"); + snprintf(udev->tmp_node, NAME_SIZE-1, "%s/.tmp-%u-%u", udev_root, udev->major, udev->minor); + udev_make_node(udev, udev->tmp_node, udev->major, udev->minor, 0600, 0, 0); + } + strfieldcatmax(string, udev->tmp_node, maxsize); + dbg("substitute temporary device node name '%s'", udev->tmp_node); + break; + case 'r': + strfieldcatmax(string, udev_root, maxsize); + dbg("substitute udev_root '%s'", udev_root); + break; default: dbg("unknown substitution type '%%%c'", c); break; @@ -586,49 +579,36 @@ static int match_place(struct config_device *dev, struct sysfs_class_device *cla return 0; } -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 */ - if (dev->bus[0] != '\0') { - if (sysfs_device == NULL) { - 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); - if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) { - dbg(FIELD_BUS " is not matching"); - goto try_parent; - } else { - dbg(FIELD_BUS " matches"); - } - } - /* 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; - } else { - dbg(FIELD_KERNEL " matches"); + goto exit; } + dbg(FIELD_KERNEL " matches"); } /* 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); + 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"); + goto exit; } + 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); + 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; @@ -637,6 +617,21 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas } } + /* check for matching bus value */ + if (dev->bus[0] != '\0') { + if (sysfs_device == NULL) { + 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); + if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) { + dbg(FIELD_BUS " is not matching"); + goto try_parent; + } + dbg(FIELD_BUS " matches"); + } + /* check for matching bus id */ if (dev->id[0] != '\0') { dbg("check " FIELD_ID); @@ -687,8 +682,7 @@ 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"); @@ -698,19 +692,20 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas } } - /* Yeah, we matched! */ + /* we matched */ return 0; try_parent: dbg("try parent sysfs device"); sysfs_device = sysfs_get_device_parent(sysfs_device); if (sysfs_device == NULL) - return -ENODEV; + goto exit; 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); } +exit: + return -1; } int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_dev) @@ -718,11 +713,8 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d 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 @@ -742,7 +734,6 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d 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); - strfieldcpy(udev->bus, sysfs_device->bus); } strfieldcpy(udev->kernel_name, class_dev->name); @@ -759,17 +750,37 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d /* 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 (dev->name[0] == '\0' && dev->symlink[0] == '\0') { - info("configured rule in '%s' at line %i applied, '%s' is ignored", + if (match_rule(udev, dev, class_dev, sysfs_device) == 0) { + + /* empty name, symlink and perms will not create any node */ + if (dev->name[0] == '\0' && dev->symlink[0] == '\0' && + 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 */ + 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 this or 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); @@ -778,83 +789,45 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d 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; - } - } - } - /* 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; + strfieldcpy(udev->name, dev->name); + 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 done; + if (udev->type == 'n') + goto exit; - udev->partitions = dev->partitions; - udev->ignore_remove = dev->ignore_remove; + udev->partitions = dev->partitions; - 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 partitions=%i", + udev->name, udev->owner, udev->group, udev->mode, udev->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); + goto exit; + } + } } - 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); + /* 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); -done: - /* store time of action */ - sysinfo(&info); - udev->config_uptime = info.uptime; +exit: + if (udev->tmp_node[0] != '\0') { + dbg("removing temporary device node"); + unlink_secure(udev->tmp_node); + udev->tmp_node[0] = '\0'; + } 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; -}