diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 101 |
1 files changed, 101 insertions, 0 deletions
@@ -36,6 +36,10 @@ #include "libblkid-tiny/libblkid-tiny.h" +#ifdef UBIFS_EXTROOT +#include "libubi/libubi.h" +#endif + #define ERROR(fmt, ...) do { \ syslog(LOG_ERR, fmt, ## __VA_ARGS__); \ fprintf(stderr, "block: "fmt, ## __VA_ARGS__); \ @@ -823,13 +827,77 @@ static int find_block_mtd(char *name, char *part, int plen) return 0; } +#ifdef UBIFS_EXTROOT +static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id) +{ + int dev = 0; + + while (ubi_dev_present(libubi, dev)) + { + struct ubi_dev_info dev_info; + struct ubi_vol_info vol_info; + + if (ubi_get_dev_info1(libubi, dev++, &dev_info)) + continue; + if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info)) + continue; + + *dev_num = dev_info.dev_num; + *vol_id = vol_info.vol_id; + + return 0; + } + + return -1; +} + +static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen) +{ + int dev_num; + int vol_id; + int err = -1; + + err = find_ubi_vol(libubi, name, &dev_num, &vol_id); + if (!err) + snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id); + + return err; +} + +static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen) +{ + int dev_num; + int vol_id; + int err = -1; + + err = find_ubi_vol(libubi, name, &dev_num, &vol_id); + if (!err) + snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id); + + return err; +} +#endif + static int check_extroot(char *path) { struct blkid_struct_probe *pr = NULL; char fs[32]; +#ifdef UBIFS_EXTROOT + if (find_block_mtd("rootfs", fs, sizeof(fs))) { + int err = -1; + libubi_t libubi; + + libubi = libubi_open(); + err = find_block_ubi_RO(libubi, "rootfs", fs, sizeof(fs)); + libubi_close(libubi); + if (err) + return -1; + } +#else if (find_block_mtd("rootfs", fs, sizeof(fs))) return -1; +#endif list_for_each_entry(pr, &devices, list) { if (!strcmp(pr->dev, fs)) { @@ -933,6 +1001,9 @@ static int main_extroot(int argc, char **argv) char fs[32] = { 0 }; char fs_data[32] = { 0 }; int err = -1; +#ifdef UBIFS_EXTROOT + libubi_t libubi; +#endif if (!getenv("PREINIT")) return -1; @@ -947,8 +1018,18 @@ static int main_extroot(int argc, char **argv) find_block_mtd("rootfs", fs, sizeof(fs)); if (!fs[0]) { +#ifdef UBIFS_EXTROOT + libubi = libubi_open(); + find_block_ubi_RO(libubi, "rootfs", fs, sizeof(fs)); + libubi_close(libubi); + if (!fs[0]) { + ERROR("extroot: unable to locate rootfs mtdblock / ubiblock\n"); + return -2; + } +#else ERROR("extroot: unable to locate rootfs mtdblock\n"); return -2; +#endif } pr = find_block_info(NULL, NULL, fs); @@ -975,6 +1056,26 @@ static int main_extroot(int argc, char **argv) } } +#ifdef UBIFS_EXTROOT + memset(fs_data, 0, sizeof(fs_data)); + libubi = libubi_open(); + find_block_ubi(libubi, "rootfs_data", fs_data, sizeof(fs_data)); + libubi_close(libubi); + if (fs_data[0]) { + char cfg[] = "/tmp/ubifs_cfg"; + + mkdir_p(cfg); + if (!mount(fs_data, cfg, "ubifs", MS_NOATIME, NULL)) { + err = mount_extroot(cfg); + umount2(cfg, MNT_DETACH); + } + if (err < 0) + rmdir("/tmp/overlay"); + rmdir(cfg); + return err; + } +#endif + return mount_extroot(NULL); } |