}
/**
- * open_bus_dir: opens up sysfs bus directory
- * returns sysfs_directory struct with success and NULL with error
+ * sysfs_get_bus_devices: gets all devices for bus
+ * @bus: bus to get devices for
+ * returns dlist of devices with success and NULL with failure
*/
-static struct sysfs_directory *open_bus_dir(const unsigned char *name)
+struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus)
{
- struct sysfs_directory *busdir = NULL;
- unsigned char buspath[SYSFS_PATH_MAX];
+ struct sysfs_device *bdev = NULL;
+ struct sysfs_directory *devdir = NULL;
+ struct sysfs_link *curl = NULL;
+ unsigned char path[SYSFS_PATH_MAX];
- if (name == NULL) {
+ if (bus == 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");
+ memset(path, 0, SYSFS_PATH_MAX);
+ strcpy(path, bus->path);
+ strcat(path, "/");
+ strcat(path, SYSFS_DEVICES_NAME);
+ devdir = sysfs_open_directory(path);
+ if (devdir == NULL)
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);
+ if (sysfs_read_dir_links(devdir) != 0) {
+ sysfs_close_directory(devdir);
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
- * @bus: bus to get devices for
- * returns 0 with success and -1 with failure
- */
-static int get_all_bus_devices(struct sysfs_bus *bus)
-{
- struct sysfs_device *bdev = NULL;
- struct sysfs_directory *cur = NULL;
- struct sysfs_link *curl = NULL;
-
- if (bus == NULL || bus->directory == NULL) {
- errno = EINVAL;
- return -1;
- }
- 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 (devdir->links != 0) {
+ dlist_for_each_data(devdir->links, curl, struct sysfs_link) {
+ bdev = sysfs_open_device_path(curl->target);
if (bdev == NULL) {
- dprintf("Error opening device at %s\n",
- curl->target);
+ dprintf("Error opening device at %s\n",
+ curl->target);
continue;
}
- if (bus->devices == NULL)
+ if (bus->devices == NULL)
bus->devices = dlist_new_with_delete
- (sizeof(struct sysfs_device),
- sysfs_close_dev);
+ (sizeof(struct sysfs_device),
+ sysfs_close_dev);
dlist_unshift(bus->devices, bdev);
}
}
-
- return 0;
+ sysfs_close_directory(devdir);
+
+ return (bus->devices);
}
/**
- * get_all_bus_drivers: get all pci drivers
+ * sysfs_get_bus_drivers: get all pci drivers
* @bus: pci bus to add drivers to
- * returns 0 with success and -1 with error
+ * returns dlist of drivers with success and NULL with error
*/
-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 *drvdir = NULL;
struct sysfs_directory *cursub = NULL;
+ unsigned char path[SYSFS_PATH_MAX];
- if (bus == NULL || bus->directory == NULL) {
+ if (bus == NULL) {
errno = EINVAL;
- return -1;
+ return NULL;
}
- if (bus->directory->subdirs == NULL)
- return 0;
+ memset(path, 0, SYSFS_PATH_MAX);
+ strcpy(path, bus->path);
+ strcat(path, "/");
+ strcat(path, SYSFS_DRIVERS_NAME);
+ drvdir = sysfs_open_directory(path);
+ if (drvdir == NULL)
+ return NULL;
- 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 (sysfs_read_dir_subdirs(drvdir) != 0) {
+ sysfs_close_directory(drvdir);
+ return NULL;
+ }
+ if (drvdir->subdirs != NULL) {
+ dlist_for_each_data(drvdir->subdirs, cursub,
+ struct sysfs_directory) {
+ driver = sysfs_open_driver_path(cursub->path);
if (driver == NULL) {
- dprintf("Error opening driver at %s\n",
- cursub->path);
+ dprintf("Error opening driver at %s\n",
+ cursub->path);
continue;
}
- if (bus->drivers == NULL)
+ if (bus->drivers == NULL)
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);
- }
- }
- }
- }
+ sysfs_close_directory(drvdir);
+ return (bus->drivers);
}
/**
struct sysfs_bus *sysfs_open_bus(const unsigned char *name)
{
struct sysfs_bus *bus = NULL;
- struct sysfs_directory *busdir = NULL;
+ unsigned char buspath[SYSFS_PATH_MAX];
if (name == NULL) {
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)) != 0) {
+ 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);
+
+ strcat(buspath, "/");
+ strcat(buspath, SYSFS_BUS_NAME);
+ strcat(buspath, "/");
+ strcat(buspath, name);
+ if ((sysfs_path_is_dir(buspath)) != 0) {
+ 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 == NULL) {
+ dprintf("calloc failed\n");
return NULL;
}
- if ((get_all_bus_drivers(bus)) != 0) {
- dprintf("Error reading %s bus drivers\n", name);
+ strcpy(bus->name, name);
+ strcpy(bus->path, buspath);
+ if ((sysfs_remove_trailing_slash(bus->path)) != 0) {
+ dprintf("Incorrect path to bus %s\n", bus->path);
sysfs_close_bus(bus);
return NULL;
}
- link_bus_devices_to_drivers(bus);
return bus;
}
return NULL;
}
+ if (bus->devices == NULL) {
+ bus->devices = sysfs_get_bus_devices(bus);
+ if (bus->devices == NULL)
+ return NULL;
+ }
+
return (struct sysfs_device *)dlist_find_custom(bus->devices, id,
bus_device_id_equal);
}
return NULL;
}
+ if (bus->drivers == NULL) {
+ bus->drivers = sysfs_get_bus_drivers(bus);
+ if (bus->drivers == NULL)
+ return NULL;
+ }
+
return (struct sysfs_driver *)dlist_find_custom(bus->drivers, drvname,
bus_driver_name_equal);
}
*/
struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus)
{
- if (bus == NULL || bus->directory == NULL)
+ if (bus == NULL)
return NULL;
+
+ if (bus->directory == NULL) {
+ bus->directory = sysfs_open_directory(bus->path);
+ if (bus->directory == NULL)
+ return NULL;
+ }
+ if (bus->directory->attributes == NULL) {
+ if ((sysfs_read_dir_attributes(bus->directory)) != 0)
+ return NULL;
+ }
return bus->directory->attributes;
}
+/**
+ * sysfs_refresh_bus_attributes: refreshes the bus's list of attributes
+ * @bus: sysfs_bus whose attributes to refresh
+ *
+ * NOTE: Upon return, prior references to sysfs_attributes for this bus
+ * _may_ not be valid
+ *
+ * Returns list of attributes on success and NULL on failure
+ */
+struct dlist *sysfs_refresh_bus_attributes(struct sysfs_bus *bus)
+{
+ if (bus == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (bus->directory == NULL)
+ return (sysfs_get_bus_attributes(bus));
+
+ if ((sysfs_refresh_dir_attributes(bus->directory)) != 0) {
+ dprintf("Error refreshing bus attributes\n");
+ return NULL;
+ }
+
+ return (bus->directory->attributes);
+}
+
/**
* sysfs_get_bus_attribute: gets a specific bus attribute, if buses had
* attributes.
struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
unsigned char *attrname)
{
- if (bus == NULL || bus->directory == NULL || attrname == NULL) {
+ struct dlist *attrlist = NULL;
+
+ if (bus == NULL) {
errno = EINVAL;
return NULL;
}
+ attrlist = sysfs_get_bus_attributes(bus);
+ if (attrlist == NULL)
+ return NULL;
+
return sysfs_get_directory_attribute(bus->directory, attrname);
}
return NULL;
}
- if (sysfs_trailing_slash(path) == 0)
- strcat(path, "/");
+ strcat(path, "/");
strcat(path, SYSFS_BUS_NAME);
strcat(path, "/");
strcat(path, busname);
strcat(path, "/");
strcat(path, dev_id);
- rdev = sysfs_open_device(path);
+ rdev = sysfs_open_device_path(path);
if (rdev == NULL) {
dprintf("Error getting device %s on bus %s\n",
dev_id, busname);
}
memset(subsys, 0, SYSFS_PATH_MAX);
+ strcat(subsys, "/");
strcpy(subsys, SYSFS_BUS_NAME);
buslist = sysfs_open_subsystem_list(subsys);
if (buslist != NULL) {
}
return -1;
}
-
~ianmdlvl / elogind.git / blobdiff