From: Josua Mayer <[email protected]> This change adds code to handle a new option on cmdline: overlay= This is used to find the rootfs_data partition / disk when it has a non-standard name or location.
It takes either the device node name, or the full path to the device node: i.e. /dev/mmcblk0p3 or mmcblk0p3 This option has precedence over the default name "rootfs_data", and extroot. Signed-off-by: Josua Mayer <[email protected]>. --- mount_root.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/mount_root.c b/mount_root.c index 47a3409..446e3cc 100644 --- a/mount_root.c +++ b/mount_root.c @@ -33,6 +33,35 @@ start(int argc, char *argv[1]) if (!getenv("PREINIT")) return -1; + /* + * Check cmdline for a hint about overlay device + */ + if (!data) { + FILE *fp; + char buffer[100] = {0}; + + fp = fopen("/proc/cmdline", "r"); + while (!feof(fp)) { + if(fscanf(fp, "overlay=%s", buffer)) + break; + + fseek(fp, 1, SEEK_CUR); + } + fclose(fp); + + // overlay= argument was found + if (buffer[0]) { + // strip /dev/ prefix if any + int offset = 0; + if (strstr(buffer, "/dev/")) + offset = 5; + + // try to find the volume + ULOG_NOTE("Looking for overlay device given on commandline\n"); + data = volume_find(buffer + offset); + } + } + if (!data) { root = volume_find("rootfs"); volume_init(root); -- 2.6.6 _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
