Some SoCs allow to store multiple boot images on a device in order to improve robustness. This adds a -r option to barebox_update to indicate we do not want to make an update but instead repair/refresh an existing image. Handlers which want to support this feature must set the BBU_HANDLER_CAN_REFRESH flag during registration.
Signed-off-by: Sascha Hauer <[email protected]> --- Documentation/user/updating.rst | 8 ++++++++ commands/barebox-update.c | 26 ++++++++++++++++---------- common/bbu.c | 12 +++++++++++- include/bbu.h | 1 + 4 files changed, 36 insertions(+), 11 deletions(-) diff --git a/Documentation/user/updating.rst b/Documentation/user/updating.rst index 6a1a733..7aac0a9 100644 --- a/Documentation/user/updating.rst +++ b/Documentation/user/updating.rst @@ -30,3 +30,11 @@ commands. The exact commands are board specific. **NOTE** barebox images can be enriched with metadata which can be used to check if a given image is suitable for updating barebox, see :ref:`imd`. + +Repairing existing boot images +------------------------------ + +Some SoCs allow to store multiple boot images on a device in order to +improve robustness. When an update handler supports it the handler can +repair and/or refresh an image from this redundant information. This is +done with the '-r' option to :ref:`command_barebox_update`. diff --git a/commands/barebox-update.c b/commands/barebox-update.c index 92e0efa..c2f2b68 100644 --- a/commands/barebox-update.c +++ b/commands/barebox-update.c @@ -26,10 +26,10 @@ static int do_barebox_update(int argc, char *argv[]) { - int opt, ret; + int opt, ret, repair = 0; struct bbu_data data = {}; - while ((opt = getopt(argc, argv, "t:yf:ld:")) > 0) { + while ((opt = getopt(argc, argv, "t:yf:ld:r")) > 0) { switch (opt) { case 'd': data.devicefile = optarg; @@ -48,19 +48,24 @@ static int do_barebox_update(int argc, char *argv[]) printf("registered update handlers:\n"); bbu_handlers_list(); return 0; + case 'r': + repair = 1; + break; default: return COMMAND_ERROR_USAGE; } } - if (!(argc - optind)) - return COMMAND_ERROR_USAGE; - - data.imagefile = argv[optind]; + if (argc - optind > 0) { + data.imagefile = argv[optind]; - data.image = read_file(data.imagefile, &data.len); - if (!data.image) - return -errno; + data.image = read_file(data.imagefile, &data.len); + if (!data.image) + return -errno; + } else { + if (!repair) + return COMMAND_ERROR_USAGE; + } ret = barebox_update(&data); @@ -74,6 +79,7 @@ BAREBOX_CMD_HELP_TEXT("Options:") BAREBOX_CMD_HELP_OPT("-l\t", "list registered targets") BAREBOX_CMD_HELP_OPT("-t TARGET", "specify data target handler name") BAREBOX_CMD_HELP_OPT("-d DEVICE", "write image to DEVICE") +BAREBOX_CMD_HELP_OPT("-r\t", "refresh or repair. Do not update, but repair an existing image") BAREBOX_CMD_HELP_OPT("-y\t", "autom. use 'yes' when asking confirmations") BAREBOX_CMD_HELP_OPT("-f LEVEL", "set force level") BAREBOX_CMD_HELP_END @@ -81,7 +87,7 @@ BAREBOX_CMD_HELP_END BAREBOX_CMD_START(barebox_update) .cmd = do_barebox_update, BAREBOX_CMD_DESC("update barebox to persistent media") - BAREBOX_CMD_OPTS("[-ltdyf] [IMAGE]") + BAREBOX_CMD_OPTS("[-ltdyfr] [IMAGE]") BAREBOX_CMD_GROUP(CMD_GRP_MISC) BAREBOX_CMD_HELP(cmd_barebox_update_help) BAREBOX_CMD_END diff --git a/common/bbu.c b/common/bbu.c index 68812a7..09c96bb 100644 --- a/common/bbu.c +++ b/common/bbu.c @@ -65,9 +65,13 @@ int bbu_confirm(struct bbu_data *data) if (data->flags & BBU_FLAG_YES) return 0; - printf("update barebox from %s using handler %s to %s (y/n)?\n", + if (data->imagefile) + printf("update barebox from %s using handler %s to %s (y/n)?\n", data->imagefile, data->handler_name, data->devicefile); + else + printf("Refresh barebox on %s using handler %s (y/n)?\n", + data->devicefile, data->handler_name); key = read_key(); @@ -141,6 +145,12 @@ int barebox_update(struct bbu_data *data) if (!handler) return -ENODEV; + if (!data->image && !data->imagefile && + !(handler->flags & BBU_HANDLER_CAN_REFRESH)) { + pr_err("No Image file given\n"); + return -EINVAL; + } + if (!data->handler_name) data->handler_name = handler->name; diff --git a/include/bbu.h b/include/bbu.h index 0fe7a1a..971fc14 100644 --- a/include/bbu.h +++ b/include/bbu.h @@ -23,6 +23,7 @@ struct bbu_handler { const char *name; struct list_head list; #define BBU_HANDLER_FLAG_DEFAULT (1 << 0) +#define BBU_HANDLER_CAN_REFRESH (1 << 1) unsigned long flags; /* default device file, can be overwritten on the command line */ -- 2.7.0 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
