/*
- * udev database library
+ * udevdb.c
+ *
+ * Userspace devfs
+ *
+ * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
*/
+
+
#include <stdlib.h>
#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
#include <fcntl.h>
#include <string.h>
-#include <sys/stat.h>
#include <errno.h>
+#include <dirent.h>
+#include "libsysfs/sysfs/libsysfs.h"
+#include "udev.h"
+#include "udev_lib.h"
+#include "logging.h"
#include "udevdb.h"
-#include "tdb.h"
-static TDB_CONTEXT *busdb;
-static TDB_CONTEXT *classdb;
-static TDB_CONTEXT *namedb;
-
-/**
- * busdb_record - bus and id are keys to look up name of device
- */
-struct busdb_record {
- char name[NAME_SIZE];
-};
-
-/**
- * classdb_record - class name and class device name used as keys to find
- * device name.
- */
-struct classdb_record {
- char name[NAME_SIZE];
-};
-
-/**
- * namedb_record - device name is key, remaining udevice info stored here.
- */
-struct namedb_record {
- char sysfs_path[PATH_SIZE];
- char class_dev_name[NAME_SIZE];
- char class_name[NAME_SIZE];
- char bus[BUS_SIZE];
- char id[ID_SIZE];
- char driver[NAME_SIZE];
- char type;
- int major;
- int minor;
- int mode;
-};
-
-/**
- * busdb_close: close busdb database
- */
-static void busdb_close(void)
-{
- if (busdb != NULL) {
- tdb_close(busdb);
- busdb = NULL;
- }
-}
+#define PATH_TO_NAME_CHAR '@'
-/**
- * classdb_close: close classdb database
- */
-static void classdb_close(void)
+static int get_db_filename(struct udevice *udev, char *filename, int len)
{
- if (classdb != NULL) {
- tdb_close(classdb);
- classdb = NULL;
- }
-}
+ char devpath[SYSFS_PATH_MAX];
+ char *pos;
-/**
- * namedb_close: close name database
- */
-static void namedb_close(void)
-{
- if (namedb != NULL) {
- tdb_close(namedb);
- namedb = NULL;
+ /* replace '/' to transform path into a filename */
+ strfieldcpy(devpath, udev->devpath);
+ pos = strchr(&devpath[1], '/');
+ while (pos) {
+ pos[0] = PATH_TO_NAME_CHAR;
+ pos = strchr(&pos[1], '/');
}
-}
+ snprintf(filename, len-1, "%s%s", udev_db_path, devpath);
+ filename[len-1] = '\0';
-/**
- * busdb_open: open busdb's database
- */
-static int busdb_open(void)
-{
- busdb = tdb_open(BUS_DB, 0, 0, O_RDWR | O_CREAT, 0644);
- if (busdb == NULL)
- return -1;
- return 0;
-}
-
-/**
- * classdb_open: open classdb's database
- */
-static int classdb_open(void)
-{
- classdb = tdb_open(CLASS_DB, 0, 0, O_RDWR | O_CREAT, 0644);
- if (classdb == NULL)
- return -1;
return 0;
}
-/**
- * namedb_open: open name database
- */
-static int namedb_open(void)
+int udevdb_add_dev(struct udevice *udev)
{
- namedb = tdb_open(NAME_DB, 0, 0, O_RDWR | O_CREAT, 0644);
- if (namedb == NULL)
- return -1;
- return 0;
-}
+ char filename[SYSFS_PATH_MAX];
+ FILE *f;
-/**
- * busdb_fetch
- */
-static struct busdb_record *busdb_fetch(const char *bus, const char *id)
-{
- TDB_DATA key, data;
- char keystr[BUS_SIZE+ID_SIZE+2];
- struct busdb_record *rec = NULL;
-
- if (bus == NULL || id == NULL)
- return NULL;
- if (strlen(bus) >= BUS_SIZE || strlen(id) >= ID_SIZE)
- return NULL;
-
- if ((busdb_open()) != 0)
- return NULL;
-
- memset(keystr, 0, (BUS_SIZE+ID_SIZE+2));
- strcpy(keystr, bus);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, id);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- data = tdb_fetch(busdb, key);
- busdb_close();
- if (data.dptr == NULL || data.dsize == 0)
- return NULL;
-
- rec = (struct busdb_record *)malloc(sizeof(struct busdb_record));
- if (rec == NULL) {
- free(data.dptr);
- return NULL;
- }
-
- memcpy(rec, data.dptr, sizeof(struct busdb_record));
- free(data.dptr);
+ if (udev->test_run)
+ return 0;
- return rec;
-}
+ get_db_filename(udev, filename, SYSFS_PATH_MAX);
-/**
- * classdb_fetch
- */
-static struct classdb_record *classdb_fetch(const char *cls,
- const char *cls_dev)
-{
- TDB_DATA key, data;
- char keystr[NAME_SIZE+NAME_SIZE+2];
- struct classdb_record *rec = NULL;
-
- if (cls == NULL || cls_dev == NULL)
- return NULL;
- if (strlen(cls) >= NAME_SIZE || strlen(cls_dev) >= NAME_SIZE)
- return NULL;
-
- if ((classdb_open()) != 0)
- return NULL;
-
- memset(keystr, 0, (NAME_SIZE+NAME_SIZE+2));
- strcpy(keystr, cls);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, cls_dev);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- data = tdb_fetch(classdb, key);
- classdb_close();
- if (data.dptr == NULL || data.dsize == 0)
- return NULL;
-
- rec = (struct classdb_record *)malloc(sizeof(struct classdb_record));
- if (rec == NULL) {
- free(data.dptr);
- return NULL;
- }
-
- memcpy(rec, data.dptr, sizeof(struct classdb_record));
- free(data.dptr);
-
- return rec;
-}
-
-/**
- * namedb_fetch
- */
-static struct namedb_record *namedb_fetch(const char *name)
-{
- TDB_DATA key, data;
- char nm_keystr[NAME_SIZE];
- struct namedb_record *nrec = NULL;
-
- if (name == NULL)
- return NULL;
- if (strlen(name) >= NAME_SIZE)
- return NULL;
-
- if ((namedb_open()) != 0)
- return NULL;
-
- memset(nm_keystr, 0, NAME_SIZE);
- strcpy(nm_keystr, name);
-
- key.dptr = (void *)nm_keystr;
- key.dsize = strlen(nm_keystr) + 1;
-
- data = tdb_fetch(namedb, key);
- namedb_close();
-
- if (data.dptr == NULL || data.dsize == 0)
- return NULL;
-
- nrec = (struct namedb_record *)malloc(sizeof(struct namedb_record));
- if (nrec == NULL) {
- free(data.dptr);
- return NULL;
- }
-
- memcpy(nrec, data.dptr, sizeof(struct namedb_record));
- free(data.dptr);
-
- return nrec;
-}
-
-/**
- * busdb_store
- */
-static int busdb_store(const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[BUS_SIZE+ID_SIZE+2];
- struct busdb_record rec;
- int retval = 0;
-
- if (dev == NULL)
- return -1;
-
- if ((retval = busdb_open()) != 0)
- return -1;
-
- memset(keystr, 0, (BUS_SIZE+ID_SIZE+2));
- strcpy(keystr, dev->bus_name);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, dev->bus_id);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- strcpy(rec.name, dev->name);
-
- data.dptr = (void *) &rec;
- data.dsize = sizeof(rec);
-
- retval = tdb_store(busdb, key, data, TDB_REPLACE);
-
- busdb_close();
- return retval;
-}
-
-/**
- * classdb_store
- */
-static int classdb_store(const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[NAME_SIZE+NAME_SIZE+2];
- struct classdb_record rec;
- int retval = 0;
-
- if (dev == NULL)
- return -1;
+ create_path(filename);
- if ((retval = classdb_open()) != 0)
- return -1;
-
- memset(keystr, 0, (NAME_SIZE+NAME_SIZE+2));
- strcpy(keystr, dev->class_name);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, dev->class_dev_name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- strcpy(rec.name, dev->name);
-
- data.dptr = (void *) &rec;
- data.dsize = sizeof(rec);
-
- retval = tdb_store(classdb, key, data, TDB_REPLACE);
-
- classdb_close();
- return retval;
-}
-
-/**
- * namedb_store
- */
-static int namedb_store(const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[NAME_SIZE];
- struct namedb_record rec;
- int retval = 0;
-
- if (dev == NULL)
- return -1;
-
- if ((retval = namedb_open()) != 0)
- return -1;
-
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, dev->name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- strcpy(rec.sysfs_path, dev->sysfs_path);
- strcpy(rec.bus, dev->bus_name);
- strcpy(rec.id, dev->bus_id);
- strcpy(rec.class_dev_name, dev->class_dev_name);
- strcpy(rec.class_name, dev->class_name);
- strcpy(rec.driver, dev->driver);
- rec.type = dev->type;
- rec.major = dev->major;
- rec.minor = dev->minor;
- rec.mode = dev->mode;
-
- data.dptr = (void *) &rec;
- data.dsize = sizeof(rec);
-
- retval = tdb_store(namedb, key, data, TDB_REPLACE);
-
- namedb_close();
- return retval;
-}
-
-/**
- * busdb_delete
- */
-static int busdb_delete(const char *bus, const char *id)
-{
- TDB_DATA key;
- char keystr[BUS_SIZE+ID_SIZE+2];
- int retval = 0;
-
- if (bus == NULL || id == NULL)
- return -1;
- if (strlen(bus) >= BUS_SIZE || strlen(id) >= ID_SIZE)
- return -1;
-
- if ((busdb_open()) != 0)
+ f = fopen(filename, "w");
+ if (f == NULL) {
+ dbg("unable to create db file '%s'", filename);
return -1;
+ }
+ dbg("storing data for device '%s' in '%s'", udev->devpath, filename);
- memset(keystr, 0, (BUS_SIZE+ID_SIZE+2));
- strcpy(keystr, bus);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, id);
+ fprintf(f, "P:%s\n", udev->devpath);
+ fprintf(f, "N:%s\n", udev->name);
+ fprintf(f, "S:%s\n", udev->symlink);
+ fprintf(f, "A:%d\n", udev->partitions);
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
+ fclose(f);
- retval = tdb_delete(busdb, key);
- busdb_close();
-
- return retval;
+ return 0;
}
-/**
- * classdb_delete
- */
-static int classdb_delete(const char *cls, const char *cls_dev)
+static int parse_db_file(struct udevice *udev, const char *filename)
{
- TDB_DATA key;
- char keystr[NAME_SIZE+NAME_SIZE+2];
- int retval = 0;
-
- if (cls == NULL || cls_dev == NULL)
- return -1;
- if (strlen(cls) >= NAME_SIZE || strlen(cls_dev) >= NAME_SIZE)
- return -1;
+ char line[NAME_SIZE];
+ char *bufline;
+ char *buf;
+ size_t bufsize;
+ size_t cur;
+ size_t count;
- if ((classdb_open()) != 0)
+ if (file_map(filename, &buf, &bufsize) != 0) {
+ dbg("unable to read db file '%s'", filename);
return -1;
+ }
- memset(keystr, 0, (NAME_SIZE+NAME_SIZE+2));
- strcpy(keystr, cls);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, cls_dev);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- retval = tdb_delete(classdb, key);
- classdb_close();
-
- return retval;
-}
-
-/**
- * namedb_delete
- */
-static int namedb_delete(const char *name)
-{
- TDB_DATA key;
- char keystr[NAME_SIZE];
- int retval = 0;
-
- if (name == NULL)
- return -1;
- if (strlen(name) >= NAME_SIZE)
- return -1;
+ cur = 0;
+ while (cur < bufsize) {
+ count = buf_get_line(buf, bufsize, cur);
+ bufline = &buf[cur];
+ cur += count+1;
+
+ switch(bufline[0]) {
+ case 'P':
+ if (count > DEVPATH_SIZE)
+ count = DEVPATH_SIZE-1;
+ strncpy(udev->devpath, &bufline[2], count-2);
+ break;
+ case 'N':
+ if (count > NAME_SIZE)
+ count = NAME_SIZE-1;
+ strncpy(udev->name, &bufline[2], count-2);
+ break;
+ case 'S':
+ if (count > NAME_SIZE)
+ count = NAME_SIZE-1;
+ strncpy(udev->symlink, &bufline[2], count-2);
+ break;
+ case 'A':
+ strfieldcpy(line, &bufline[2]);
+ udev->partitions = atoi(line);
+ break;
+ }
+ }
- if ((namedb_open()) != 0)
+ if (udev->name[0] == '\0')
return -1;
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- retval = tdb_delete(namedb, key);
- namedb_close();
-
- return retval;
+ return 0;
}
-/**
- * namedb_exists
- */
-static int namedb_exists(const char *name)
+int udevdb_get_dev(struct udevice *udev)
{
- TDB_DATA key;
- char keystr[NAME_SIZE];
- int retval = 0;
-
- if (name == NULL)
- return retval;
- if (strlen(name) >= NAME_SIZE)
- return retval;
-
- if ((namedb_open()) != 0)
- return retval;
-
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, name);
+ char filename[SYSFS_PATH_MAX];
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
+ get_db_filename(udev, filename, SYSFS_PATH_MAX);
- retval = tdb_exists(namedb, key);
- namedb_close();
-
- return retval;
+ return parse_db_file(udev, filename);
}
-/**
- * udevdb_delete_udevice
- */
-int udevdb_delete_udevice(const char *name)
+int udevdb_delete_dev(struct udevice *udev)
{
- struct namedb_record *nrec = NULL;
-
- if (name == NULL)
- return -1;
-
- nrec = namedb_fetch(name);
- if (nrec == NULL)
- return -1;
+ char filename[SYSFS_PATH_MAX];
- busdb_delete(nrec->bus, nrec->id);
- classdb_delete(nrec->class_name, nrec->class_dev_name);
- namedb_delete(name);
- free(nrec);
+ get_db_filename(udev, filename, SYSFS_PATH_MAX);
+ unlink(filename);
return 0;
}
-/**
- * udevdb_add_udevice: adds udevice to database
- */
-int udevdb_add_udevice(const struct udevice *dev)
+int udevdb_get_dev_byname(struct udevice *udev, const char *name)
{
- if (dev == NULL)
- return -1;
+ struct dirent *ent;
+ DIR *dir;
+ char filename[NAME_SIZE];
+ struct udevice db_udev;
- if ((busdb_store(dev)) != 0)
- return -1;
- if ((classdb_store(dev)) != 0)
- return -1;
- if ((namedb_store(dev)) != 0)
+ dir = opendir(udev_db_path);
+ if (dir == NULL) {
+ dbg("unable to udev db '%s'", udev_db_path);
return -1;
-
- return 0;
-}
-
-/**
- * udevdb_get_device: grab's device by name
- */
-struct udevice *udevdb_get_udevice(const char *name)
-{
- struct namedb_record *nrec = NULL;
- struct udevice *dev = NULL;
-
- if (name == NULL)
- return NULL;
-
- nrec = namedb_fetch(name);
- if (nrec == NULL)
- return NULL;
-
- dev = (struct udevice *)malloc(sizeof(struct udevice));
- if (dev == NULL) {
- free(nrec);
- return NULL;
}
- strcpy(dev->name, name);
- strcpy(dev->sysfs_path, nrec->sysfs_path);
- strcpy(dev->class_dev_name, nrec->class_dev_name);
- strcpy(dev->class_name, nrec->class_name);
- strcpy(dev->bus_name, nrec->bus);
- strcpy(dev->bus_id, nrec->id);
- dev->type = nrec->type;
- dev->major = nrec->major;
- dev->minor = nrec->minor;
- dev->mode = nrec->mode;
+ while (1) {
+ ent = readdir(dir);
+ if (ent == NULL || ent->d_name[0] == '\0')
+ break;
- free(nrec);
+ if (ent->d_name[0] == '.')
+ continue;
- return dev;
-}
+ snprintf(filename, NAME_SIZE-1, "%s/%s", udev_db_path, ent->d_name);
+ filename[NAME_SIZE-1] = '\0';
-/**
- * udevdb_get_device_by_bus
- */
-struct udevice *udevdb_get_udevice_by_bus(const char *bus, const char *id)
-{
- struct busdb_record *brec = NULL;
- struct udevice *dev = NULL;
+ memset(&db_udev, 0x00, sizeof(struct udevice));
+ if (parse_db_file(&db_udev, filename) == 0) {
+ char *pos;
+ int len;
- if (bus == NULL || id == NULL)
- return NULL;
+ if (strncmp(name, db_udev.name, NAME_SIZE) == 0) {
+ goto found;
+ }
- brec = busdb_fetch(bus, id);
- if (brec == NULL)
- return NULL;
+ foreach_strpart(db_udev.symlink, " ", pos, len) {
+ if (strncmp(name, pos, len) != 0)
+ continue;
- dev = udevdb_get_udevice(brec->name);
- free(brec);
+ if (len == strlen(name))
+ goto found;
+ }
- return dev;
-}
+ }
+ }
-/**
- * udevdb_get_udevice_by_class
- */
-struct udevice *udevdb_get_udevice_by_class(const char *cls,
- const char *cls_dev)
-{
- struct classdb_record *crec = NULL;
- struct udevice *dev = NULL;
+ closedir(dir);
- if (cls == NULL || cls_dev == NULL)
- return NULL;
+ return -1;
- crec = classdb_fetch(cls, cls_dev);
- if (crec == NULL)
- return NULL;
+found:
+ closedir(dir);
- dev = udevdb_get_udevice(crec->name);
- free(crec);
+ strfieldcpy(udev->devpath, db_udev.devpath);
+ strfieldcpy(udev->name, db_udev.name);
+ strfieldcpy(udev->symlink, db_udev.symlink);
+ udev->partitions = db_udev.partitions;
- return dev;
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff