*
* Generic bus utility functions for libsysfs
*
- * Copyright (C) IBM Corp. 2003
+ * Copyright (C) IBM Corp. 2003-2005
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
}
/*
- * compares devices' bus ids.
- * @a: device id looking for
+ * compares names.
+ * @a: name looked for
* @b: sysfs_device comparing being compared
- * returns 1 if a==b->bus_id or 0 not equal
- */
-static int bus_device_id_equal(void *a, void *b)
-{
- if (a == NULL || b == NULL)
- return 0;
-
- if (strcmp(((unsigned char *)a), ((struct sysfs_device *)b)->bus_id)
- == 0)
- return 1;
- return 0;
-}
-
-/*
- * compares drivers' names.
- * @a: driver name looking for
- * @b: sysfs_driver comparing being compared
* returns 1 if a==b->name or 0 not equal
*/
-static int bus_driver_name_equal(void *a, void *b)
+static int name_equal(void *a, void *b)
{
- if (a == NULL || b == NULL)
+ if (!a || !b)
return 0;
- if (strcmp(((unsigned char *)a), ((struct sysfs_driver *)b)->name) == 0)
+ if (strcmp(((char *)a), ((struct sysfs_device *)b)->name) == 0)
return 1;
+
return 0;
}
*/
void sysfs_close_bus(struct sysfs_bus *bus)
{
- if (bus != NULL) {
- if (bus->directory != NULL)
- sysfs_close_directory(bus->directory);
+ if (bus) {
+ if (bus->attrlist)
+ dlist_destroy(bus->attrlist);
if (bus->devices)
dlist_destroy(bus->devices);
if (bus->drivers)
}
/**
- * open_bus_dir: opens up sysfs bus directory
- * returns sysfs_directory struct with success and NULL with error
- */
-static struct sysfs_directory *open_bus_dir(const unsigned char *name)
-{
- struct sysfs_directory *busdir = NULL;
- unsigned char buspath[SYSFS_PATH_MAX];
-
- if (name == NULL) {
- errno = EINVAL;
- return NULL;
- }
-
- memset(buspath, 0, SYSFS_PATH_MAX);
- if ((sysfs_get_mnt_path(buspath, SYSFS_PATH_MAX)) != 0) {
- dprintf("Sysfs not supported on this system\n");
- return NULL;
- }
-
- if (sysfs_trailing_slash(buspath) == 0)
- strcat(buspath, "/");
-
- strcat(buspath, SYSFS_BUS_NAME);
- strcat(buspath, "/");
- strcat(buspath, name);
- busdir = sysfs_open_directory(buspath);
- if (busdir == NULL) {
- errno = EINVAL;
- dprintf("Bus %s not supported on this system\n",
- name);
- return NULL;
- }
- if ((sysfs_read_directory(busdir)) != 0) {
- dprintf("Error reading %s bus dir %s\n", name,
- buspath);
- sysfs_close_directory(busdir);
- return NULL;
- }
- /* read in devices and drivers subdirs */
- sysfs_read_all_subdirs(busdir);
-
- return busdir;
-}
-
-/**
- * get_all_bus_devices: gets all devices for bus
+ * sysfs_get_bus_devices: gets all devices for bus
* @bus: bus to get devices for
- * returns 0 with success and -1 with failure
+ * returns dlist of devices with success and NULL with failure
*/
-static int get_all_bus_devices(struct sysfs_bus *bus)
+struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus)
{
- struct sysfs_device *bdev = NULL;
- struct sysfs_directory *cur = NULL;
- struct sysfs_link *curl = NULL;
+ struct sysfs_device *dev;
+ struct dlist *linklist;
+ char path[SYSFS_PATH_MAX], devpath[SYSFS_PATH_MAX];
+ char target[SYSFS_PATH_MAX];
+ char *curlink;
- if (bus == NULL || bus->directory == NULL) {
+ if (!bus) {
errno = EINVAL;
- return -1;
+ return NULL;
}
- if (bus->directory->subdirs == NULL)
- return 0;
-
- dlist_for_each_data(bus->directory->subdirs, cur,
- struct sysfs_directory) {
- if (strcmp(cur->name, SYSFS_DEVICES_NAME) != 0)
- continue;
- if (cur->links == NULL)
- continue;
- dlist_for_each_data(cur->links, curl, struct sysfs_link) {
- bdev = sysfs_open_device(curl->target);
- if (bdev == NULL) {
- dprintf("Error opening device at %s\n",
- curl->target);
+ memset(path, 0, SYSFS_PATH_MAX);
+ safestrcpy(path, bus->path);
+ safestrcat(path, "/");
+ safestrcat(path, SYSFS_DEVICES_NAME);
+
+ linklist = read_dir_links(path);
+ if (linklist) {
+ dlist_for_each_data(linklist, curlink, char) {
+ if (bus->devices) {
+ dev = (struct sysfs_device *)
+ dlist_find_custom(bus->devices,
+ (void *)curlink, name_equal);
+ if (dev)
+ continue;
+ }
+ safestrcpy(devpath, path);
+ safestrcat(devpath, "/");
+ safestrcat(devpath, curlink);
+ if (sysfs_get_link(devpath, target, SYSFS_PATH_MAX)) {
+ dprintf("Error getting link - %s\n", devpath);
+ continue;
+ }
+ dev = sysfs_open_device_path(target);
+ if (!dev) {
+ dprintf("Error opening device at %s\n",
+ target);
continue;
}
- if (bus->devices == NULL)
+ if (!bus->devices)
bus->devices = dlist_new_with_delete
- (sizeof(struct sysfs_device),
- sysfs_close_dev);
- dlist_unshift(bus->devices, bdev);
+ (sizeof(struct sysfs_device),
+ sysfs_close_dev);
+ dlist_unshift_sorted(bus->devices, dev, sort_list);
}
+ sysfs_close_list(linklist);
}
-
- return 0;
+ return (bus->devices);
}
/**
- * get_all_bus_drivers: get all pci drivers
- * @bus: pci bus to add drivers to
- * returns 0 with success and -1 with error
+ * sysfs_get_bus_drivers: gets all drivers for bus
+ * @bus: bus to get devices for
+ * returns dlist of devices with success and NULL with failure
*/
-static int get_all_bus_drivers(struct sysfs_bus *bus)
+struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus)
{
- struct sysfs_driver *driver = NULL;
- struct sysfs_directory *cur = NULL;
- struct sysfs_directory *cursub = NULL;
+ struct sysfs_driver *drv;
+ struct dlist *dirlist;
+ char path[SYSFS_PATH_MAX], drvpath[SYSFS_PATH_MAX];
+ char *curdir;
- if (bus == NULL || bus->directory == NULL) {
+ if (!bus) {
errno = EINVAL;
- return -1;
+ return NULL;
}
- if (bus->directory->subdirs == NULL)
- return 0;
-
- dlist_for_each_data(bus->directory->subdirs, cur,
- struct sysfs_directory) {
- if (strcmp(cur->name, SYSFS_DRIVERS_NAME) != 0)
- continue;
- if (cur->subdirs == NULL)
- continue;
- dlist_for_each_data(cur->subdirs, cursub,
- struct sysfs_directory) {
- driver = sysfs_open_driver(cursub->path);
- if (driver == NULL) {
- dprintf("Error opening driver at %s\n",
- cursub->path);
+ memset(path, 0, SYSFS_PATH_MAX);
+ safestrcpy(path, bus->path);
+ safestrcat(path, "/");
+ safestrcat(path, SYSFS_DRIVERS_NAME);
+
+ dirlist = read_dir_subdirs(path);
+ if (dirlist) {
+ dlist_for_each_data(dirlist, curdir, char) {
+ if (bus->drivers) {
+ drv = (struct sysfs_driver *)
+ dlist_find_custom(bus->drivers,
+ (void *)curdir, name_equal);
+ if (drv)
+ continue;
+ }
+ safestrcpy(drvpath, path);
+ safestrcat(drvpath, "/");
+ safestrcat(drvpath, curdir);
+ drv = sysfs_open_driver_path(drvpath);
+ if (!drv) {
+ dprintf("Error opening driver at %s\n",
+ drvpath);
continue;
}
- if (bus->drivers == NULL)
+ if (!bus->drivers)
bus->drivers = dlist_new_with_delete
- (sizeof(struct sysfs_driver),
+ (sizeof(struct sysfs_driver),
sysfs_close_drv);
- dlist_unshift(bus->drivers, driver);
- }
- }
-
- return 0;
-}
-
-/**
- * match_bus_device_to_driver: returns 1 if device is bound to driver
- * @driver: driver to match
- * @busid: busid of device to match
- * returns 1 if found and 0 if not found
- */
-static int match_bus_device_to_driver(struct sysfs_driver *driver,
- unsigned char *busid)
-{
- struct sysfs_link *cur = NULL;
- int found = 0;
-
- if (driver == NULL || driver->directory == NULL || busid == NULL) {
- errno = EINVAL;
- return found;
- }
- if (driver->directory->links != NULL) {
- dlist_for_each_data(driver->directory->links, cur,
- struct sysfs_link) {
- if ((strcmp(cur->name, busid)) == 0)
- found++;
- }
- }
- return found;
-}
-
-/**
- * link_bus_devices_to_drivers: goes through and links devices to drivers
- * @bus: bus to link
- */
-static void link_bus_devices_to_drivers(struct sysfs_bus *bus)
-{
- struct sysfs_device *dev = NULL;
- struct sysfs_driver *drv = NULL;
-
- if (bus != NULL && bus->devices != NULL && bus->drivers != NULL) {
- dlist_for_each_data(bus->devices, dev, struct sysfs_device) {
- dlist_for_each_data(bus->drivers, drv,
- struct sysfs_driver) {
- if ((match_bus_device_to_driver(drv,
- dev->bus_id)) != 0) {
- strncpy(dev->driver_name, drv->name,
- SYSFS_NAME_LEN);
- if (drv->devices == NULL)
- drv->devices = dlist_new
- (sizeof(struct
- sysfs_device));
- dlist_unshift(drv->devices, dev);
- }
- }
+ dlist_unshift_sorted(bus->drivers, drv, sort_list);
}
+ sysfs_close_list(dirlist);
}
+ return (bus->drivers);
}
/**
* sysfs_open_bus: opens specific bus and all its devices on system
* returns sysfs_bus structure with success or NULL with error.
*/
-struct sysfs_bus *sysfs_open_bus(const unsigned char *name)
+struct sysfs_bus *sysfs_open_bus(const char *name)
{
- struct sysfs_bus *bus = NULL;
- struct sysfs_directory *busdir = NULL;
+ struct sysfs_bus *bus;
+ char buspath[SYSFS_PATH_MAX];
- if (name == NULL) {
+ if (!name) {
errno = EINVAL;
return NULL;
}
- bus = alloc_bus();
- if (bus == NULL) {
- dprintf("calloc failed\n");
+ memset(buspath, 0, SYSFS_PATH_MAX);
+ if (sysfs_get_mnt_path(buspath, SYSFS_PATH_MAX)) {
+ dprintf("Sysfs not supported on this system\n");
return NULL;
}
- strcpy(bus->name, name);
- busdir = open_bus_dir(name);
- if (busdir == NULL) {
- dprintf("Invalid bus, %s not supported on this system\n",
- name);
- sysfs_close_bus(bus);
+
+ safestrcat(buspath, "/");
+ safestrcat(buspath, SYSFS_BUS_NAME);
+ safestrcat(buspath, "/");
+ safestrcat(buspath, name);
+ if (sysfs_path_is_dir(buspath)) {
+ dprintf("Invalid path to bus: %s\n", buspath);
return NULL;
}
- strcpy(bus->path, busdir->path);
- bus->directory = busdir;
- if ((get_all_bus_devices(bus)) != 0) {
- dprintf("Error reading %s bus devices\n", name);
- sysfs_close_bus(bus);
+ bus = alloc_bus();
+ if (!bus) {
+ dprintf("calloc failed\n");
return NULL;
}
- if ((get_all_bus_drivers(bus)) != 0) {
- dprintf("Error reading %s bus drivers\n", name);
+ safestrcpy(bus->name, name);
+ safestrcpy(bus->path, buspath);
+ if (sysfs_remove_trailing_slash(bus->path)) {
+ dprintf("Incorrect path to bus %s\n", bus->path);
sysfs_close_bus(bus);
return NULL;
}
- link_bus_devices_to_drivers(bus);
return bus;
}
* returns struct sysfs_device reference or NULL if not found.
*/
struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
- unsigned char *id)
+ const char *id)
{
- if (bus == NULL || id == NULL) {
+ struct sysfs_device *dev = NULL;
+ char devpath[SYSFS_PATH_MAX], target[SYSFS_PATH_MAX];
+
+ if (!bus || !id) {
errno = EINVAL;
return NULL;
}
- return (struct sysfs_device *)dlist_find_custom(bus->devices, id,
- bus_device_id_equal);
+ if (bus->devices) {
+ dev = (struct sysfs_device *)dlist_find_custom
+ (bus->devices, (void *)id, name_equal);
+ if (dev)
+ return dev;
+ }
+ safestrcpy(devpath, bus->path);
+ safestrcat(devpath, "/");
+ safestrcat(devpath, SYSFS_DEVICES_NAME);
+ safestrcat(devpath, "/");
+ safestrcat(devpath, id);
+ if (sysfs_path_is_link(devpath)) {
+ dprintf("No such device %s on bus %s?\n", id, bus->name);
+ return NULL;
+ }
+ if (!sysfs_get_link(devpath, target, SYSFS_PATH_MAX)) {
+ dev = sysfs_open_device_path(target);
+ if (!dev) {
+ dprintf("Error opening device at %s\n", target);
+ return NULL;
+ }
+ if (!bus->devices)
+ bus->devices = dlist_new_with_delete
+ (sizeof(struct sysfs_device),
+ sysfs_close_dev);
+ dlist_unshift_sorted(bus->devices, dev, sort_list);
+ }
+ return dev;
}
/**
* @drvname: name of driver
* returns struct sysfs_driver reference or NULL if not found.
*/
-struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
- unsigned char *drvname)
-{
- if (bus == NULL || drvname == NULL) {
- errno = EINVAL;
- return NULL;
- }
-
- return (struct sysfs_driver *)dlist_find_custom(bus->drivers, drvname,
- bus_driver_name_equal);
-}
-
-/**
- * sysfs_get_bus_attributes: returns bus' dlist of attributes
- * @bus: bus to get attributes for.
- * returns dlist of attributes or NULL if there aren't any.
- */
-struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus)
-{
- if (bus == NULL || bus->directory == NULL)
- return NULL;
- return bus->directory->attributes;
-}
-
-/**
- * sysfs_get_bus_attribute: gets a specific bus attribute, if buses had
- * attributes.
- * @bus: bus to retrieve attribute from
- * @attrname: attribute name to retrieve
- * returns reference to sysfs_attribute if found or NULL if not found
- */
-struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
- unsigned char *attrname)
+struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
+ const char *drvname)
{
- if (bus == NULL || bus->directory == NULL || attrname == NULL) {
+ struct sysfs_driver *drv;
+ char drvpath[SYSFS_PATH_MAX];
+
+ if (!bus || !drvname) {
errno = EINVAL;
return NULL;
}
- return sysfs_get_directory_attribute(bus->directory, attrname);
-}
-
-/**
- * sysfs_open_bus_device: locates a device on a bus and returns it. Device
- * must be closed using sysfs_close_device.
- * @busname: Name of bus to search
- * @dev_id: Id of device on bus.
- * returns sysfs_device if found or NULL if not.
- */
-struct sysfs_device *sysfs_open_bus_device(unsigned char *busname,
- unsigned char *dev_id)
-{
- struct sysfs_device *rdev = NULL;
- char path[SYSFS_PATH_MAX];
- if (busname == NULL || dev_id == NULL) {
- errno = EINVAL;
- return NULL;
+ if (bus->drivers) {
+ drv = (struct sysfs_driver *)dlist_find_custom
+ (bus->drivers, (void *)drvname, name_equal);
+ if (drv)
+ return drv;
}
-
- memset(path, 0, SYSFS_PATH_MAX);
- if (sysfs_get_mnt_path(path, SYSFS_PATH_MAX) != 0) {
- dprintf("Error getting sysfs mount point\n");
+ safestrcpy(drvpath, bus->path);
+ safestrcat(drvpath, "/");
+ safestrcat(drvpath, SYSFS_DRIVERS_NAME);
+ safestrcat(drvpath, "/");
+ safestrcat(drvpath, drvname);
+ drv = sysfs_open_driver_path(drvpath);
+ if (!drv) {
+ dprintf("Error opening driver at %s\n", drvpath);
return NULL;
}
-
- if (sysfs_trailing_slash(path) == 0)
- strcat(path, "/");
- strcat(path, SYSFS_BUS_NAME);
- strcat(path, "/");
- strcat(path, busname);
- strcat(path, "/");
- strcat(path, SYSFS_DEVICES_NAME);
- strcat(path, "/");
- strcat(path, dev_id);
-
- rdev = sysfs_open_device(path);
- if (rdev == NULL) {
- dprintf("Error getting device %s on bus %s\n",
- dev_id, busname);
- return NULL;
- }
-
- return rdev;
+ if (!bus->drivers)
+ bus->drivers = dlist_new_with_delete
+ (sizeof(struct sysfs_driver),
+ sysfs_close_drv);
+ dlist_unshift_sorted(bus->drivers, drv, sort_list);
+ return drv;
}
-/**
- * sysfs_find_driver_bus: locates the bus the driver is on.
- * @driver: name of the driver to locate
- * @busname: buffer to copy name to
- * @bsize: buffer size
- * returns 0 with success, -1 with error
- */
-int sysfs_find_driver_bus(const unsigned char *driver, unsigned char *busname,
- size_t bsize)
-{
- unsigned char subsys[SYSFS_PATH_MAX], *bus = NULL, *curdrv = NULL;
- struct dlist *buslist = NULL, *drivers = NULL;
-
- if (driver == NULL || busname == NULL) {
- errno = EINVAL;
- return -1;
- }
-
- memset(subsys, 0, SYSFS_PATH_MAX);
- strcpy(subsys, SYSFS_BUS_NAME);
- buslist = sysfs_open_subsystem_list(subsys);
- if (buslist != NULL) {
- dlist_for_each_data(buslist, bus, char) {
- memset(subsys, 0, SYSFS_PATH_MAX);
- strcat(subsys, "/");
- strcpy(subsys, SYSFS_BUS_NAME);
- strcat(subsys, "/");
- strcat(subsys, bus);
- strcat(subsys, "/");
- strcat(subsys, SYSFS_DRIVERS_NAME);
- drivers = sysfs_open_subsystem_list(subsys);
- if (drivers != NULL) {
- dlist_for_each_data(drivers, curdrv, char) {
- if (strcmp(driver, curdrv) == 0) {
- strncpy(busname, bus, bsize);
- sysfs_close_list(drivers);
- sysfs_close_list(buslist);
- return 0;
- }
- }
- sysfs_close_list(drivers);
- }
- }
- sysfs_close_list(buslist);
- }
- return -1;
-}
-
~ianmdlvl / elogind.git / blobdiff