#include "libudev-private.h"
struct udev_device {
- int refcount;
struct udev *udev;
struct udev_device *parent_device;
char *syspath;
const char *sysnum;
char *devnode;
char *subsystem;
- struct udev_list_node devlinks_list;
- struct udev_list_node properties_list;
- char *envp[128];
- int envp_uptodate;
char *driver;
- dev_t devnum;
char *action;
- int event_timeout;
char *devpath_old;
char *physdevpath;
- int timeout;
+ char **envp;
+ char *monitor_buf;
+ size_t monitor_buf_len;
+ struct udev_list_node devlinks_list;
+ struct udev_list_node properties_list;
+ struct udev_list_node sysattr_list;
unsigned long long int seqnum;
+ int event_timeout;
+ int timeout;
int num_fake_partitions;
int devlink_priority;
- int ignore_remove;
- struct udev_list_node attr_list;
- int info_loaded;
+ int refcount;
+ dev_t devnum;
+ unsigned int parent_set:1;
+ unsigned int subsystem_set:1;
+ unsigned int devlinks_uptodate:1;
+ unsigned int envp_uptodate:1;
+ unsigned int driver_set:1;
+ unsigned int info_loaded:1;
+ unsigned int ignore_remove:1;
};
static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len)
return util_path_encode(&filename[start], len - start);
}
-static int device_read_db(struct udev_device *udev_device)
+int udev_device_read_db(struct udev_device *udev_device)
{
struct stat stats;
char filename[UTIL_PATH_SIZE];
return 0;
}
-static int device_read_uevent_file(struct udev_device *udev_device)
+int udev_device_read_uevent_file(struct udev_device *udev_device)
{
char filename[UTIL_PATH_SIZE];
FILE *f;
static void device_load_info(struct udev_device *device)
{
device->info_loaded = 1;
- device_read_uevent_file(device);
- device_read_db(device);
+ udev_device_read_uevent_file(device);
+ udev_device_read_db(device);
}
void udev_device_set_info_loaded(struct udev_device *device)
struct udev_device *device_new(struct udev *udev)
{
struct udev_device *udev_device;
+ struct udev_list_entry *list_entry;
if (udev == NULL)
return NULL;
- udev_device = malloc(sizeof(struct udev_device));
+ udev_device = calloc(1, sizeof(struct udev_device));
if (udev_device == NULL)
return NULL;
- memset(udev_device, 0x00, sizeof(struct udev_device));
udev_device->refcount = 1;
udev_device->udev = udev;
udev_list_init(&udev_device->devlinks_list);
udev_list_init(&udev_device->properties_list);
- udev_list_init(&udev_device->attr_list);
+ udev_list_init(&udev_device->sysattr_list);
udev_device->event_timeout = -1;
+ /* copy global properties */
+ udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev))
+ udev_device_add_property(udev_device,
+ udev_list_entry_get_name(list_entry),
+ udev_list_entry_get_value(list_entry));
info(udev_device->udev, "udev_device: %p created\n", udev_device);
return udev_device;
}
{
if (udev_device == NULL)
return NULL;
-
- if (udev_device->parent_device != NULL) {
- info(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device);
- return udev_device->parent_device;
+ if (!udev_device->parent_set) {
+ udev_device->parent_set = 1;
+ udev_device->parent_device = device_new_from_parent(udev_device);
}
- udev_device->parent_device = device_new_from_parent(udev_device);
+ if (udev_device->parent_device != NULL)
+ info(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device);
return udev_device->parent_device;
}
**/
void udev_device_unref(struct udev_device *udev_device)
{
- unsigned int i;
-
if (udev_device == NULL)
return;
udev_device->refcount--;
free(udev_device->sysname);
free(udev_device->devnode);
free(udev_device->subsystem);
- udev_list_cleanup(udev_device->udev, &udev_device->devlinks_list);
- udev_list_cleanup(udev_device->udev, &udev_device->properties_list);
+ udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list);
+ udev_list_cleanup_entries(udev_device->udev, &udev_device->properties_list);
free(udev_device->action);
free(udev_device->driver);
free(udev_device->devpath_old);
free(udev_device->physdevpath);
- udev_list_cleanup(udev_device->udev, &udev_device->attr_list);
- for (i = 0; i < ARRAY_SIZE(udev_device->envp) && udev_device->envp[i] != NULL; i++)
- free(udev_device->envp[i]);
+ udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_list);
+ free(udev_device->envp);
+ free(udev_device->monitor_buf);
info(udev_device->udev, "udev_device: %p released\n", udev_device);
free(udev_device);
}
if (udev_device == NULL)
return NULL;
- if (udev_device->subsystem != NULL)
- return udev_device->subsystem;
-
- /* read "subsytem" link */
- if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) > 0) {
- udev_device->subsystem = strdup(subsystem);
- return udev_device->subsystem;
- }
-
- /* implicit names */
- if (strncmp(udev_device->devpath, "/module/", 8) == 0) {
- udev_device->subsystem = strdup("module");
- return udev_device->subsystem;
- }
- if (strstr(udev_device->devpath, "/drivers/") != NULL) {
- udev_device->subsystem = strdup("drivers");
- return udev_device->subsystem;
- }
- if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 ||
- strncmp(udev_device->devpath, "/class/", 7) == 0 ||
- strncmp(udev_device->devpath, "/bus/", 5) == 0) {
- udev_device->subsystem = strdup("subsystem");
- return udev_device->subsystem;
+ if (!udev_device->subsystem_set) {
+ udev_device->subsystem_set = 1;
+ /* read "subsytem" link */
+ if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) > 0) {
+ udev_device_set_subsystem(udev_device, subsystem);
+ return udev_device->subsystem;
+ }
+ /* implicit names */
+ if (strncmp(udev_device->devpath, "/module/", 8) == 0) {
+ udev_device_set_subsystem(udev_device, "module");
+ return udev_device->subsystem;
+ }
+ if (strstr(udev_device->devpath, "/drivers/") != NULL) {
+ udev_device_set_subsystem(udev_device, "drivers");
+ return udev_device->subsystem;
+ }
+ if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 ||
+ strncmp(udev_device->devpath, "/class/", 7) == 0 ||
+ strncmp(udev_device->devpath, "/bus/", 5) == 0) {
+ udev_device_set_subsystem(udev_device, "subsystem");
+ return udev_device->subsystem;
+ }
}
- return NULL;
+ return udev_device->subsystem;
}
/**
void udev_device_cleanup_devlinks_list(struct udev_device *udev_device)
{
- udev_list_cleanup(udev_device->udev, &udev_device->devlinks_list);
+ udev_device->devlinks_uptodate = 0;
+ udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list);
}
/**
return NULL;
if (!udev_device->info_loaded)
device_load_info(udev_device);
+ if (!udev_device->devlinks_uptodate) {
+ char symlinks[UTIL_PATH_SIZE];
+ struct udev_list_entry *list_entry;
+
+ udev_device->devlinks_uptodate = 1;
+ list_entry = udev_device_get_devlinks_list_entry(udev_device);
+ if (list_entry != NULL) {
+ util_strlcpy(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
+ udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
+ util_strlcat(symlinks, " ", sizeof(symlinks));
+ util_strlcat(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
+ }
+ udev_device_add_property(udev_device, "DEVLINKS", symlinks);
+ }
+ }
return udev_list_get_entry(&udev_device->properties_list);
}
if (udev_device == NULL)
return NULL;
- if (udev_device->driver != NULL)
- return udev_device->driver;
- if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) < 2)
- return NULL;
- udev_device->driver = strdup(driver);
+ if (!udev_device->driver_set) {
+ udev_device->driver_set = 1;
+ if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) > 0)
+ udev_device->driver = strdup(driver);
+ }
return udev_device->driver;
}
return udev_device->seqnum;
}
-const char *udev_device_get_attr_value(struct udev_device *udev_device, const char *attr)
+const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr)
{
struct udev_list_entry *list_entry;
char path[UTIL_PATH_SIZE];
if (udev_device == NULL)
return NULL;
- if (attr == NULL)
+ if (sysattr == NULL)
return NULL;
/* look for possibly already cached result */
- udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->attr_list)) {
- if (strcmp(udev_list_entry_get_name(list_entry), attr) == 0) {
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_list)) {
+ if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) {
info(udev_device->udev, "got '%s' (%s) from cache\n",
- attr, udev_list_entry_get_value(list_entry));
+ sysattr, udev_list_entry_get_value(list_entry));
return udev_list_entry_get_value(list_entry);
}
}
util_strlcpy(path, udev_device_get_syspath(udev_device), sizeof(path));
util_strlcat(path, "/", sizeof(path));
- util_strlcat(path, attr, sizeof(path));
+ util_strlcat(path, sysattr, sizeof(path));
if (lstat(path, &statbuf) != 0) {
- info(udev_device->udev, "stat '%s' failed: %m\n", path);
+ info(udev_device->udev, "no attribute '%s', keep negative entry\n", path);
+ udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, NULL, 0, 0);
goto out;
}
pos = strrchr(target, '/');
if (pos != NULL) {
pos = &pos[1];
- info(udev_device->udev, "cache '%s' with link value '%s'\n", attr, pos);
- list_entry = udev_list_entry_add(udev_device->udev, &udev_device->attr_list, attr, pos, 0, 0);
+ info(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos);
+ list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, pos, 0, 0);
val = udev_list_entry_get_value(list_entry);
}
}
value[size] = '\0';
util_remove_trailing_chars(value, '\n');
info(udev_device->udev, "'%s' has attribute value '%s'\n", path, value);
- list_entry = udev_list_entry_add(udev_device->udev, &udev_device->attr_list, attr, value, 0, 0);
+ list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, value, 0, 0);
val = udev_list_entry_get_value(list_entry);
out:
return val;
}
/* trailing number */
- while (isdigit(udev_device->sysname[--len]))
+ while (len > 0 && isdigit(udev_device->sysname[--len]))
udev_device->sysnum = &udev_device->sysname[len];
+
+ /* sysname is completely numeric */
+ if (len == 0)
+ udev_device->sysnum = NULL;
+
return 0;
}
udev_device->subsystem = strdup(subsystem);
if (udev_device->subsystem == NULL)
return -ENOMEM;
+ udev_device->subsystem_set = 1;
udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem);
return 0;
}
{
free(udev_device->devnode);
udev_device->devnode = strdup(devnode);
+ if (devnode == NULL)
+ return 0;
if (udev_device->devnode == NULL)
return -ENOMEM;
udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode);
int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink)
{
- char symlinks[UTIL_PATH_SIZE];
- struct udev_list_entry *list_entry;
-
+ udev_device->devlinks_uptodate = 0;
if (udev_list_entry_add(udev_device->udev, &udev_device->devlinks_list, devlink, NULL, 1, 0) == NULL)
return -ENOMEM;
- list_entry = udev_device_get_devlinks_list_entry(udev_device);
- util_strlcpy(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
- udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
- util_strlcat(symlinks, " ", sizeof(symlinks));
- util_strlcat(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
- }
- udev_device_add_property(udev_device, "DEVLINKS", symlinks);
return 0;
}
struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value)
{
udev_device->envp_uptodate = 0;
+ if (value == NULL) {
+ struct udev_list_entry *list_entry;
+
+ list_entry = udev_device_get_properties_list_entry(udev_device);
+ list_entry = udev_list_entry_get_by_name(list_entry, key);
+ if (list_entry != NULL)
+ udev_list_entry_remove(list_entry);
+ return NULL;
+ }
return udev_list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0);
}
char name[UTIL_PATH_SIZE];
char *val;
- strncpy(name, property, sizeof(name));
+ util_strlcpy(name, property, sizeof(name));
val = strchr(name, '=');
if (val == NULL)
return NULL;
return udev_device_add_property(udev_device, name, val);
}
-char **udev_device_get_properties_envp(struct udev_device *udev_device)
+#define ENVP_SIZE 128
+#define MONITOR_BUF_SIZE 4096
+static int update_envp_monitor_buf(struct udev_device *udev_device)
{
- if (!udev_device->envp_uptodate) {
- unsigned int i;
- struct udev_list_entry *list_entry;
+ const char *action;
+ struct udev_list_entry *list_entry;
+ size_t bufpos;
+ size_t len;
+ unsigned int i;
- for (i = 0; i < ARRAY_SIZE(udev_device->envp) && udev_device->envp[i] != NULL; i++)
- free(udev_device->envp[i]);
- i = 0;
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
- asprintf(&udev_device->envp[i++], "%s=%s",
- udev_list_entry_get_name(list_entry),
- udev_list_entry_get_value(list_entry));
- if (i+1 >= ARRAY_SIZE(udev_device->envp))
- break;
- }
- udev_device->envp[i] = NULL;
- info(udev_device->udev, "constructed envp from %u properties\n", i);
- udev_device->envp_uptodate = 1;
+ /* monitor buffer of property strings */
+ free(udev_device->monitor_buf);
+ udev_device->monitor_buf_len = 0;
+ udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE);
+ if (udev_device->monitor_buf == NULL)
+ return -ENOMEM;
+
+ /* envp array, strings will point into monitor buffer */
+ if (udev_device->envp == NULL)
+ udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE);
+ if (udev_device->envp == NULL)
+ return -ENOMEM;
+
+ /* header <action>@<devpath> */
+ action = udev_device_get_action(udev_device);
+ if (action == NULL)
+ return -EINVAL;
+ bufpos = util_strlcpy(udev_device->monitor_buf, action, MONITOR_BUF_SIZE);
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], "@", MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos],
+ udev_device_get_devpath(udev_device),
+ MONITOR_BUF_SIZE-bufpos);
+ if (len+1 >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len+1;
+
+ i = 0;
+ udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
+ /* add string to envp array */
+ udev_device->envp[i++] = &udev_device->monitor_buf[bufpos];
+ if (i+1 >= ENVP_SIZE)
+ return -EINVAL;
+
+ /* add property string to monitor buffer */
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos],
+ udev_list_entry_get_name(list_entry), MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], "=", MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], udev_list_entry_get_value(list_entry),
+ MONITOR_BUF_SIZE-bufpos);
+ if (len+1 >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len+1;
}
+ udev_device->envp[i] = NULL;
+ udev_device->monitor_buf_len = bufpos;
+ udev_device->envp_uptodate = 1;
+ info(udev_device->udev, "filled envp/monitor buffer, %u properties, %zu bytes\n", i, bufpos);
+ return 0;
+}
+
+char **udev_device_get_properties_envp(struct udev_device *udev_device)
+{
+ if (!udev_device->envp_uptodate)
+ if (update_envp_monitor_buf(udev_device) != 0)
+ return NULL;
return udev_device->envp;
}
+ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf)
+{
+ if (!udev_device->envp_uptodate)
+ if (update_envp_monitor_buf(udev_device) != 0)
+ return -EINVAL;
+ *buf = udev_device->monitor_buf;
+ return udev_device->monitor_buf_len;
+}
+
int udev_device_set_action(struct udev_device *udev_device, const char *action)
{
free(udev_device->action);
udev_device->action = strdup(action);
if (udev_device->action == NULL)
return -ENOMEM;
- udev_device_add_property(udev_device, "ACTION", action);
+ udev_device_add_property(udev_device, "ACTION", udev_device->action);
return 0;
}
udev_device->driver = strdup(driver);
if (udev_device->driver == NULL)
return -ENOMEM;
+ udev_device->driver_set = 1;
+ udev_device_add_property(udev_device, "DRIVER", udev_device->driver);
return 0;
}
udev_device->devpath_old = strdup(devpath_old);
if (udev_device->devpath_old == NULL)
return -ENOMEM;
+ udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old);
return 0;
}
int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum)
{
+ char num[32];
+
udev_device->seqnum = seqnum;
+ snprintf(num, sizeof(num), "%llu", seqnum);
+ udev_device_add_property(udev_device, "SEQNUM", num);
return 0;
}
int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum)
{
+ char num[32];
+
udev_device->devnum = devnum;
+
+ snprintf(num, sizeof(num), "%u", major(devnum));
+ udev_device_add_property(udev_device, "MAJOR", num);
+ snprintf(num, sizeof(num), "%u", minor(devnum));
+ udev_device_add_property(udev_device, "MINOR", num);
return 0;
}
~ianmdlvl / elogind.git / blobdiff