diff options
Diffstat (limited to 'libsysfs/sysfs_bus.c')
| -rw-r--r-- | libsysfs/sysfs_bus.c | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/libsysfs/sysfs_bus.c b/libsysfs/sysfs_bus.c deleted file mode 100644 index d47b94ca24..0000000000 --- a/libsysfs/sysfs_bus.c +++ /dev/null @@ -1,400 +0,0 @@ -/* - * sysfs_bus.c - * - * Generic bus utility functions for libsysfs - * - * Copyright (C) IBM Corp. 2003 - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ -#include "libsysfs.h" -#include "sysfs.h" - -static void sysfs_close_dev(void *dev) -{ - sysfs_close_device((struct sysfs_device *)dev); -} - -static void sysfs_close_drv(void *drv) -{ - sysfs_close_driver((struct sysfs_driver *)drv); -} - -/* - * compares devices' bus ids. - * @a: device id looking 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(((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) -{ - if (a == NULL || b == NULL) - return 0; - - if (strcmp(((char *)a), ((struct sysfs_driver *)b)->name) == 0) - return 1; - return 0; -} - -/** - * sysfs_close_bus: close single bus - * @bus: bus structure - */ -void sysfs_close_bus(struct sysfs_bus *bus) -{ - if (bus != NULL) { - if (bus->directory != NULL) - sysfs_close_directory(bus->directory); - if (bus->devices) - dlist_destroy(bus->devices); - if (bus->drivers) - dlist_destroy(bus->drivers); - free(bus); - } -} - -/** - * alloc_bus: mallocs new bus structure - * returns sysfs_bus_bus struct or NULL - */ -static struct sysfs_bus *alloc_bus(void) -{ - return (struct sysfs_bus *)calloc(1, sizeof(struct sysfs_bus)); -} - -/** - * 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 - */ -struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus) -{ - struct sysfs_device *bdev = NULL; - struct sysfs_directory *devdir = NULL; - struct sysfs_link *curl = NULL; - char path[SYSFS_PATH_MAX]; - - if (bus == NULL) { - errno = EINVAL; - return NULL; - } - memset(path, 0, SYSFS_PATH_MAX); - safestrcpy(path, bus->path); - safestrcat(path, "/"); - safestrcat(path, SYSFS_DEVICES_NAME); - devdir = sysfs_open_directory(path); - if (devdir == NULL) - return NULL; - - if (sysfs_read_dir_links(devdir) != 0) { - sysfs_close_directory(devdir); - return NULL; - } - - if (devdir->links != NULL) { - 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); - continue; - } - if (bus->devices == NULL) - bus->devices = dlist_new_with_delete - (sizeof(struct sysfs_device), - sysfs_close_dev); - dlist_unshift_sorted(bus->devices, bdev, sort_list); - } - } - sysfs_close_directory(devdir); - - return (bus->devices); -} - -/** - * sysfs_get_bus_drivers: get all pci drivers - * @bus: pci bus to add drivers to - * returns dlist of drivers with success and NULL with error - */ -struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus) -{ - struct sysfs_driver *driver = NULL; - struct sysfs_directory *drvdir = NULL; - struct sysfs_directory *cursub = NULL; - char path[SYSFS_PATH_MAX]; - - if (bus == NULL) { - errno = EINVAL; - return NULL; - } - memset(path, 0, SYSFS_PATH_MAX); - safestrcpy(path, bus->path); - safestrcat(path, "/"); - safestrcat(path, SYSFS_DRIVERS_NAME); - drvdir = sysfs_open_directory(path); - if (drvdir == NULL) - return NULL; - - 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); - continue; - } - if (bus->drivers == NULL) - bus->drivers = dlist_new_with_delete - (sizeof(struct sysfs_driver), - sysfs_close_drv); - dlist_unshift_sorted(bus->drivers, driver, sort_list); - } - } - sysfs_close_directory(drvdir); - 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 char *name) -{ - struct sysfs_bus *bus = NULL; - 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; - } - - safestrcat(buspath, "/"); - safestrcat(buspath, SYSFS_BUS_NAME); - safestrcat(buspath, "/"); - safestrcat(buspath, name); - if ((sysfs_path_is_dir(buspath)) != 0) { - dprintf("Invalid path to bus: %s\n", buspath); - return NULL; - } - bus = alloc_bus(); - if (bus == NULL) { - dprintf("calloc failed\n"); - return NULL; - } - safestrcpy(bus->name, name); - safestrcpy(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; - } - - return bus; -} - -/** - * sysfs_get_bus_device: Get specific device on bus using device's id - * @bus: bus to find device on - * @id: bus_id for device - * returns struct sysfs_device reference or NULL if not found. - */ -struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus, char *id) -{ - if (bus == NULL || id == NULL) { - errno = EINVAL; - 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); -} - -/** - * sysfs_get_bus_driver: Get specific driver on bus using driver name - * @bus: bus to find driver on - * @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, - char *drvname) -{ - if (bus == NULL || drvname == NULL) { - errno = EINVAL; - 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); -} - -/** - * 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) - 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. - * @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, - char *attrname) -{ - 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); -} - -/** - * 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 char *driver, char *busname, size_t bsize) -{ - 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); - safestrcpy(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); - safestrcpy(subsys, SYSFS_BUS_NAME); - safestrcat(subsys, "/"); - safestrcat(subsys, bus); - safestrcat(subsys, "/"); - safestrcat(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) { - safestrcpymax(busname, - bus, bsize); - sysfs_close_list(drivers); - sysfs_close_list(buslist); - return 0; - } - } - sysfs_close_list(drivers); - } - } - sysfs_close_list(buslist); - } - return -1; -} |