diff options
Diffstat (limited to 'roots.c')
| -rw-r--r-- | roots.c | 391 |
1 files changed, 254 insertions, 137 deletions
@@ -20,213 +20,330 @@ #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> -#include <ctype.h> #include "mtdutils/mtdutils.h" #include "mtdutils/mounts.h" + +#ifdef USE_EXT4 +#include "make_ext4fs.h" +#endif + +#include "minzip/Zip.h" #include "roots.h" #include "common.h" -#include "make_ext4fs.h" -static int num_volumes = 0; -static Volume* device_volumes = NULL; +typedef struct { + const char *name; + const char *device; + const char *device2; // If the first one doesn't work (may be NULL) + const char *partition_name; + const char *mount_point; + const char *filesystem; +} RootInfo; -void load_volume_table() { - int alloc = 2; - device_volumes = malloc(alloc * sizeof(Volume)); +/* Canonical pointers. +xxx may just want to use enums + */ +static const char g_mtd_device[] = "@\0g_mtd_device"; +static const char g_raw[] = "@\0g_raw"; +static const char g_package_file[] = "@\0g_package_file"; +static const char g_ramdisk[] = "@\0g_ramdisk"; - FILE* fstab = fopen("/etc/recovery.fstab", "r"); - if (fstab == NULL) { - LOGE("failed to open /etc/recovery.fstab (%s)\n", strerror(errno)); - return; - } +static RootInfo g_roots[] = { + { "SDCARD:", "/dev/block/mmcblk0p1", "/dev/block/mmcblk0", NULL, "/sdcard", "vfat" }, + { "TMP:", NULL, NULL, NULL, "/tmp", g_ramdisk }, - char buffer[1024]; - int i; - while (fgets(buffer, sizeof(buffer)-1, fstab)) { - for (i = 0; buffer[i] && isspace(buffer[i]); ++i); - if (buffer[i] == '\0' || buffer[i] == '#') continue; +#ifdef USE_EXT4 + { "CACHE:", "/dev/block/platform/sdhci-tegra.3/by-name/cache", NULL, NULL, + "/cache", "ext4" }, + { "DATA:", "/dev/block/platform/sdhci-tegra.3/by-name/userdata", NULL, NULL, + "/data", "ext4" }, + { "EXT:", "/dev/block/sda1", NULL, NULL, "/sdcard", "vfat" }, +#else + { "CACHE:", g_mtd_device, NULL, "cache", "/cache", "yaffs2" }, + { "DATA:", g_mtd_device, NULL, "userdata", "/data", "yaffs2" }, + { "EXT:", "/dev/block/mmcblk0p1", "/dev/block/mmcblk0", NULL, "/sdcard", "vfat" }, + { "MISC:", g_mtd_device, NULL, "misc", NULL, g_raw }, +#endif - char* original = strdup(buffer); +}; +#define NUM_ROOTS (sizeof(g_roots) / sizeof(g_roots[0])) - char* mount_point = strtok(buffer+i, " \t\n"); - char* fs_type = strtok(NULL, " \t\n"); - char* device = strtok(NULL, " \t\n"); - // lines may optionally have a second device, to use if - // mounting the first one fails. - char* device2 = strtok(NULL, " \t\n"); +static const RootInfo * +get_root_info_for_path(const char *root_path) +{ + const char *c; - if (mount_point && fs_type && device) { - while (num_volumes >= alloc) { - alloc *= 2; - device_volumes = realloc(device_volumes, alloc*sizeof(Volume)); - } - device_volumes[num_volumes].mount_point = strdup(mount_point); - device_volumes[num_volumes].fs_type = strdup(fs_type); - device_volumes[num_volumes].device = strdup(device); - device_volumes[num_volumes].device2 = - device2 ? strdup(device2) : NULL; - ++num_volumes; - } else { - LOGE("skipping malformed recovery.fstab line: %s\n", original); + /* Find the first colon. + */ + c = root_path; + while (*c != '\0' && *c != ':') { + c++; + } + if (*c == '\0') { + return NULL; + } + size_t len = c - root_path + 1; + size_t i; + for (i = 0; i < NUM_ROOTS; i++) { + RootInfo *info = &g_roots[i]; + if (strncmp(info->name, root_path, len) == 0) { + return info; } - free(original); } + return NULL; +} - fclose(fstab); +/* Takes a string like "SYSTEM:lib" and turns it into a string + * like "/system/lib". The translated path is put in out_buf, + * and out_buf is returned if the translation succeeded. + */ +const char * +translate_root_path(const char *root_path, char *out_buf, size_t out_buf_len) +{ + if (out_buf_len < 1) { + return NULL; + } + + const RootInfo *info = get_root_info_for_path(root_path); + if (info == NULL || info->mount_point == NULL) { + return NULL; + } - printf("recovery filesystem table\n"); - printf("=========================\n"); - for (i = 0; i < num_volumes; ++i) { - Volume* v = &device_volumes[i]; - printf(" %d %s %s %s %s\n", i, v->mount_point, v->fs_type, - v->device, v->device2); + /* Find the relative part of the non-root part of the path. + */ + root_path += strlen(info->name); // strip off the "root:" + while (*root_path != '\0' && *root_path == '/') { + root_path++; } - printf("\n"); + + size_t mp_len = strlen(info->mount_point); + size_t rp_len = strlen(root_path); + if (mp_len + 1 + rp_len + 1 > out_buf_len) { + return NULL; + } + + /* Glue the mount point to the relative part of the path. + */ + memcpy(out_buf, info->mount_point, mp_len); + if (out_buf[mp_len - 1] != '/') out_buf[mp_len++] = '/'; + + memcpy(out_buf + mp_len, root_path, rp_len); + out_buf[mp_len + rp_len] = '\0'; + + return out_buf; } -Volume* volume_for_path(const char* path) { - int i; - for (i = 0; i < num_volumes; ++i) { - Volume* v = device_volumes+i; - int len = strlen(v->mount_point); - if (strncmp(path, v->mount_point, len) == 0 && - (path[len] == '\0' || path[len] == '/')) { - return v; - } +static int +internal_root_mounted(const RootInfo *info) +{ + if (info->mount_point == NULL) { + return -1; } - return NULL; + if (info->filesystem == g_ramdisk) { + return 0; + } + + /* See if this root is already mounted. + */ + int ret = scan_mounted_volumes(); + if (ret < 0) { + return ret; + } + const MountedVolume *volume; + volume = find_mounted_volume_by_mount_point(info->mount_point); + if (volume != NULL) { + /* It's already mounted. + */ + return 0; + } + return -1; } -int ensure_path_mounted(const char* path) { - Volume* v = volume_for_path(path); - if (v == NULL) { - LOGE("unknown volume for path [%s]\n", path); +int +is_root_path_mounted(const char *root_path) +{ + const RootInfo *info = get_root_info_for_path(root_path); + if (info == NULL) { return -1; } + return internal_root_mounted(info) >= 0; +} - int result; - result = scan_mounted_volumes(); - if (result < 0) { - LOGE("failed to scan mounted volumes\n"); +int +ensure_root_path_mounted(const char *root_path) +{ + const RootInfo *info = get_root_info_for_path(root_path); + if (info == NULL) { return -1; } - const MountedVolume* mv = - find_mounted_volume_by_mount_point(v->mount_point); - if (mv) { - // volume is already mounted + int ret = internal_root_mounted(info); + if (ret >= 0) { + /* It's already mounted. + */ return 0; } - mkdir(v->mount_point, 0755); // in case it doesn't already exist - - if (strcmp(v->fs_type, "yaffs2") == 0) { - // mount an MTD partition as a YAFFS2 filesystem. + /* It's not mounted. + */ + if (info->device == g_mtd_device) { + if (info->partition_name == NULL) { + return -1; + } +//TODO: make the mtd stuff scan once when it needs to mtd_scan_partitions(); - const MtdPartition* partition; - partition = mtd_find_partition_by_name(v->device); + const MtdPartition *partition; + partition = mtd_find_partition_by_name(info->partition_name); if (partition == NULL) { - LOGE("failed to find \"%s\" partition to mount at \"%s\"\n", - v->device, v->mount_point); return -1; } - return mtd_mount_partition(partition, v->mount_point, v->fs_type, 0); - } else if (strcmp(v->fs_type, "ext4") == 0 || - strcmp(v->fs_type, "vfat") == 0) { - result = mount(v->device, v->mount_point, v->fs_type, - MS_NOATIME | MS_NODEV | MS_NODIRATIME, ""); - if (result == 0) return 0; - - if (v->device2) { - LOGW("failed to mount %s (%s); trying %s\n", - v->device, strerror(errno), v->device2); - result = mount(v->device2, v->mount_point, v->fs_type, - MS_NOATIME | MS_NODEV | MS_NODIRATIME, ""); - if (result == 0) return 0; - } + return mtd_mount_partition(partition, info->mount_point, + info->filesystem, 0); + } - LOGE("failed to mount %s (%s)\n", v->mount_point, strerror(errno)); + if (info->device == NULL || info->mount_point == NULL || + info->filesystem == NULL || + info->filesystem == g_raw || + info->filesystem == g_package_file) { return -1; } - LOGE("unknown fs_type \"%s\" for %s\n", v->fs_type, v->mount_point); - return -1; + mkdir(info->mount_point, 0755); // in case it doesn't already exist + if (mount(info->device, info->mount_point, info->filesystem, + MS_NOATIME | MS_NODEV | MS_NODIRATIME, "")) { + if (info->device2 == NULL) { + LOGE("Can't mount %s\n(%s)\n", info->device, strerror(errno)); + return -1; + } else if (mount(info->device2, info->mount_point, info->filesystem, + MS_NOATIME | MS_NODEV | MS_NODIRATIME, "")) { + LOGE("Can't mount %s (or %s)\n(%s)\n", + info->device, info->device2, strerror(errno)); + return -1; + } + } + return 0; } -int ensure_path_unmounted(const char* path) { - Volume* v = volume_for_path(path); - if (v == NULL) { - LOGE("unknown volume for path [%s]\n", path); +int +ensure_root_path_unmounted(const char *root_path) +{ + const RootInfo *info = get_root_info_for_path(root_path); + if (info == NULL) { return -1; } - - int result; - result = scan_mounted_volumes(); - if (result < 0) { - LOGE("failed to scan mounted volumes\n"); - return -1; + if (info->mount_point == NULL) { + /* This root can't be mounted, so by definition it isn't. + */ + return 0; } +//xxx if TMP: (or similar) just return error - const MountedVolume* mv = - find_mounted_volume_by_mount_point(v->mount_point); - if (mv == NULL) { - // volume is already unmounted + /* See if this root is already mounted. + */ + int ret = scan_mounted_volumes(); + if (ret < 0) { + return ret; + } + const MountedVolume *volume; + volume = find_mounted_volume_by_mount_point(info->mount_point); + if (volume == NULL) { + /* It's not mounted. + */ return 0; } - return unmount_mounted_volume(mv); + return unmount_mounted_volume(volume); } -int format_volume(const char* volume) { - Volume* v = volume_for_path(volume); - if (v == NULL) { - LOGE("unknown volume \"%s\"\n", volume); - return -1; +const MtdPartition * +get_root_mtd_partition(const char *root_path) +{ + const RootInfo *info = get_root_info_for_path(root_path); + if (info == NULL || info->device != g_mtd_device || + info->partition_name == NULL) + { + return NULL; } - if (strcmp(v->mount_point, volume) != 0) { - LOGE("can't give path \"%s\" to format_volume\n", volume); + mtd_scan_partitions(); + return mtd_find_partition_by_name(info->partition_name); +} + +int +format_root_device(const char *root) +{ + /* Be a little safer here; require that "root" is just + * a device with no relative path after it. + */ + const char *c = root; + while (*c != '\0' && *c != ':') { + c++; + } + if (c[0] != ':' || c[1] != '\0') { + LOGW("format_root_device: bad root name \"%s\"\n", root); return -1; } - if (ensure_path_unmounted(volume) != 0) { - LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point); + const RootInfo *info = get_root_info_for_path(root); + if (info == NULL || info->device == NULL) { + LOGW("format_root_device: can't resolve \"%s\"\n", root); return -1; } + if (info->mount_point != NULL) { + /* Don't try to format a mounted device. + */ + int ret = ensure_root_path_unmounted(root); + if (ret < 0) { + LOGW("format_root_device: can't unmount \"%s\"\n", root); + return ret; + } + } - if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0) { + /* Format the device. + */ + if (info->device == g_mtd_device) { mtd_scan_partitions(); - const MtdPartition* partition = mtd_find_partition_by_name(v->device); + const MtdPartition *partition; + partition = mtd_find_partition_by_name(info->partition_name); if (partition == NULL) { - LOGE("format_volume: no MTD partition \"%s\"\n", v->device); + LOGW("format_root_device: can't find mtd partition \"%s\"\n", + info->partition_name); return -1; } - - MtdWriteContext *write = mtd_write_partition(partition); - if (write == NULL) { - LOGW("format_volume: can't open MTD \"%s\"\n", v->device); - return -1; - } else if (mtd_erase_blocks(write, -1) == (off_t) -1) { - LOGW("format_volume: can't erase MTD \"%s\"\n", v->device); - mtd_write_close(write); - return -1; - } else if (mtd_write_close(write)) { - LOGW("format_volume: can't close MTD \"%s\"\n", v->device); - return -1; + if (info->filesystem == g_raw || !strcmp(info->filesystem, "yaffs2")) { + MtdWriteContext *write = mtd_write_partition(partition); + if (write == NULL) { + LOGW("format_root_device: can't open \"%s\"\n", root); + return -1; + } else if (mtd_erase_blocks(write, -1) == (off_t) -1) { + LOGW("format_root_device: can't erase \"%s\"\n", root); + mtd_write_close(write); + return -1; + } else if (mtd_write_close(write)) { + LOGW("format_root_device: can't close \"%s\"\n", root); + return -1; + } else { + return 0; + } } - return 0; } - if (strcmp(v->fs_type, "ext4") == 0) { +#ifdef USE_EXT4 + if (strcmp(info->filesystem, "ext4") == 0) { + LOGW("starting to reformat ext4\n"); reset_ext4fs_info(); - int result = make_ext4fs(v->device, NULL, NULL, 0, 0, 0); + int result = make_ext4fs(info->device, NULL, NULL, 0, 0, 0); + LOGW("finished reformat ext4: result = %d\n", result); if (result != 0) { - LOGE("format_volume: make_extf4fs failed on %s\n", v->device); + LOGW("make_ext4fs failed: %d\n", result); return -1; } return 0; } +#endif + +//TODO: handle other device types (sdcard, etc.) - LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type); + LOGW("format_root_device: unknown device \"%s\"\n", root); return -1; } |