diff options
| -rw-r--r-- | common/bootm.c | 25 | ||||
| -rw-r--r-- | include/bootm.h | 2 |
2 files changed, 25 insertions, 2 deletions
diff --git a/common/bootm.c b/common/bootm.c index 7f22ca5ced..5dc00e713d 100644 --- a/common/bootm.c +++ b/common/bootm.c @@ -65,6 +65,7 @@ void bootm_data_init_defaults(struct bootm_data *data) getenv_ul("global.bootm.image.loadaddr", &data->os_address); getenv_ul("global.bootm.initrd.loadaddr", &data->initrd_address); data->initrd_file = getenv_nonempty("global.bootm.initrd"); + data->root_dev = getenv_nonempty("global.bootm.root_dev"); data->verify = bootm_get_verify_mode(); data->appendroot = bootm_appendroot; data->provide_machine_id = bootm_provide_machine_id; @@ -711,7 +712,25 @@ int bootm_boot(struct bootm_data *bootm_data) if (bootm_data->appendroot) { char *rootarg; - rootarg = path_get_linux_rootarg(data->os_file); + if (bootm_data->root_dev) { + const char *root_dev_name = devpath_to_name(bootm_data->root_dev); + const struct cdev *root_cdev = cdev_by_name(root_dev_name); + + if (root_cdev && root_cdev->partuuid[0] != 0) { + rootarg = basprintf("root=PARTUUID=%s", root_cdev->partuuid); + } else { + rootarg = ERR_PTR(-EINVAL); + + if (!root_cdev) + pr_err("no cdev found for %s, cannot set root= option\n", + root_dev_name); + else if (!root_cdev->partuuid[0]) + pr_err("%s doesn't have a PARTUUID, cannot set root= option\n", + root_dev_name); + } + } else { + rootarg = path_get_linux_rootarg(data->os_file); + } if (!IS_ERR(rootarg)) { printf("Adding \"%s\" to Kernel commandline\n", rootarg); globalvar_add_simple("linux.bootargs.bootm.appendroot", @@ -802,6 +821,7 @@ static int bootm_init(void) globalvar_add_simple("bootm.image", NULL); globalvar_add_simple("bootm.image.loadaddr", NULL); globalvar_add_simple("bootm.oftree", NULL); + globalvar_add_simple("bootm.root_dev", NULL); globalvar_add_simple("bootm.tee", NULL); globalvar_add_simple_bool("bootm.appendroot", &bootm_appendroot); globalvar_add_simple_bool("bootm.provide_machine_id", &bootm_provide_machine_id); @@ -831,5 +851,6 @@ BAREBOX_MAGICVAR_NAMED(global_bootm_oftree, global.bootm.oftree, "bootm default BAREBOX_MAGICVAR_NAMED(global_bootm_tee, global.bootm.tee, "bootm default tee image"); BAREBOX_MAGICVAR_NAMED(global_bootm_verify, global.bootm.verify, "bootm default verify level"); BAREBOX_MAGICVAR_NAMED(global_bootm_verbose, global.bootm.verbose, "bootm default verbosity level (0=quiet)"); -BAREBOX_MAGICVAR_NAMED(global_bootm_appendroot, global.bootm.appendroot, "Add root= option to Kernel to mount rootfs from the device the Kernel comes from"); +BAREBOX_MAGICVAR_NAMED(global_bootm_appendroot, global.bootm.appendroot, "Add root= option to Kernel to mount rootfs from the device the Kernel comes from (default, device can be overridden via global.bootm.root_dev)"); +BAREBOX_MAGICVAR_NAMED(global_bootm_root_dev, global.bootm.root_dev, "bootm default root device (overrides default device in global.bootm.appendroot)"); BAREBOX_MAGICVAR_NAMED(global_bootm_provide_machine_id, global.bootm.provide_machine_id, "If true, add systemd.machine_id= with value of global.machine_id to Kernel"); diff --git a/include/bootm.h b/include/bootm.h index ef5148f31e..51e9b3d71a 100644 --- a/include/bootm.h +++ b/include/bootm.h @@ -18,6 +18,7 @@ struct bootm_data { const char *initrd_file; const char *oftree_file; const char *tee_file; + const char *root_dev; int verbose; enum bootm_verify verify; bool force; @@ -25,6 +26,7 @@ struct bootm_data { /* * appendroot - if true, try to add a suitable root= Kernel option to * mount the rootfs from the same device as the Kernel comes from. + * The default rootfs device can be overridden with root_dev. */ bool appendroot; /* |