From 730148bc94411f13a0171204e872b0760fbde185 Mon Sep 17 00:00:00 2001 From: Brandon Maier Date: Mon, 12 Dec 2022 12:01:58 -0600 Subject: mtd-utils: Add new syntax to get devices by name This introduces a new feature to the MTD command line utilities that allows MTD devices to be referenced by name instead of device node. For example this looks like: > # Display info for the MTD device with name "data" > mtdinfo mtd:data > # Copy file to MTD device with name "data" > flashcp /my/file mtd:data This follows the syntax supported by the kernel which allows MTD device's to be mounted by name[1]. Add the function mtd_find_dev_node() that accepts an MTD "identifier" and returns the MTD's device node. The function accepts a string starting with "mtd:" which it treats as the MTD's name. It then attempts to search for the MTD, and if found maps it back to the /dev/mtdX device node. If the string does not start with "mtd:", then assume it's the old style and refers directly to a MTD device node. The function is then hooked into existing tools like flashcp, mtdinfo, flash_unlock, etc. To load in the new MTD parsing code in a consistent way across programs. [1] http://www.linux-mtd.infradead.org/faq/jffs2.html#L_mtdblock Signed-off-by: Brandon Maier Signed-off-by: David Oberhollenzer --- misc-utils/flash_erase.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'misc-utils/flash_erase.c') diff --git a/misc-utils/flash_erase.c b/misc-utils/flash_erase.c index 49a880f..000f94a 100644 --- a/misc-utils/flash_erase.c +++ b/misc-utils/flash_erase.c @@ -71,6 +71,8 @@ static void display_help (void) " --silent same as --quiet\n" " --help display this help and exit\n" " --version output version information and exit\n", + "\n" + " MTD_DEVICE MTD device node or 'mtd:'\n" PROGRAM_NAME); } @@ -169,7 +171,9 @@ int main(int argc, char *argv[]) } switch (argc - optind) { case 3: - mtd_device = argv[optind]; + mtd_device = mtd_find_dev_node(argv[optind]); + if (!mtd_device) + return errmsg("Can't find MTD device %s", argv[optind]); start = simple_strtoull(argv[optind + 1], &error); eb_cnt = simple_strtoul(argv[optind + 2], &error); break; -- cgit v1.2.3