165 lines
4 KiB
C
165 lines
4 KiB
C
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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <dirent.h>
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#include <errno.h>
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#include <sys/types.h>
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#include "vold.h"
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#include "media.h"
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static media_list_t *list_root = NULL;
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media_t *media_create(char *devpath, char *name, char *serial, media_type_t type)
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{
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media_list_t *list_entry;
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media_t *new;
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if (!(new = malloc(sizeof(media_t))))
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return NULL;
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memset(new, 0, sizeof(media_t));
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if (!(list_entry = malloc(sizeof(media_list_t)))) {
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free(new);
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return NULL;
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}
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list_entry->media = new;
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list_entry->next = NULL;
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if (!list_root)
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list_root = list_entry;
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else {
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media_list_t *list_scan = list_root;
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while(list_scan->next)
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list_scan = list_scan->next;
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list_scan->next = list_entry;
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}
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new->devpath = strdup(devpath);
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new->name = strdup(name);
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if (!serial)
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new->serial = 0;
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else
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new->serial = strtoul(serial, NULL, 0);
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new->media_type = type;
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return new;
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}
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void media_destroy(media_t *media)
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{
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media_list_t *list_next;
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if (list_root->media == media) {
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list_next = list_root->next;
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free(list_root);
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list_root = list_next;
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} else {
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media_list_t *list_scan = list_root;
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while (list_scan->next->media != media)
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list_scan = list_scan -> next;
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list_next = list_scan->next->next;
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free(list_scan->next);
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list_scan->next = list_next;
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}
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free(media->devpath);
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free(media->name);
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if (media->devs)
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LOGE("media_destroy(): media still has blkdevs associated with it! Possible leak\n");
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free(media);
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}
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media_t *media_lookup_by_path(char *devpath, boolean fuzzy_match)
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{
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media_list_t *list_scan = list_root;
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while (list_scan) {
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if (fuzzy_match) {
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if (!strncmp(list_scan->media->devpath, devpath, strlen(devpath)))
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return list_scan->media;
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} else {
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if (!strcmp(list_scan->media->devpath, devpath))
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return list_scan->media;
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}
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list_scan = list_scan->next;
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}
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#if DEBUG_MEDIA
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LOG_VOL("media_lookup_by_path(): No media found @ %s\n", devpath);
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#endif
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return NULL;
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}
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int media_add_blkdev(media_t *card, blkdev_t *dev)
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{
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blkdev_list_t *list_entry;
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if (!(list_entry = malloc(sizeof(blkdev_list_t)))) {
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LOGE("Out of memory\n");
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return -ENOMEM;
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}
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list_entry->next = NULL;
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list_entry->dev = dev;
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if (!card->devs)
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card->devs = list_entry;
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else {
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blkdev_list_t *scan = card->devs;
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while(scan->next)
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scan = scan->next;
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scan->next = list_entry;
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}
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return 0;
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}
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void media_remove_blkdev(media_t *card, blkdev_t *dev)
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{
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if (card->devs->dev == dev)
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card->devs = card->devs->next;
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else {
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blkdev_list_t *scan = card->devs;
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while (scan->next->dev != dev)
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scan = scan -> next;
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blkdev_list_t *next = scan->next->next;
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free(scan->next);
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scan->next = next;
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}
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}
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media_t *media_lookup_by_dev(blkdev_t *dev)
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{
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media_list_t *media_scan = list_root;
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while (media_scan) {
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blkdev_list_t *blk_scan = media_scan->media->devs;
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while (blk_scan) {
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if (blk_scan->dev == dev)
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return media_scan->media;
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blk_scan = blk_scan->next;
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}
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media_scan = media_scan->next;
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}
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return NULL;
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}
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