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author | Gabor Juhos <juhosg@openwrt.org> | 2013-09-21 17:55:49 +0000 |
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committer | Gabor Juhos <juhosg@openwrt.org> | 2013-09-21 17:55:49 +0000 |
commit | daec7ad7688415156e2730e401503d09bd3acf91 (patch) | |
tree | 19024b77d7baba8cfad2b3321d8edd4a4fbae1c1 /target/linux/generic/files/drivers | |
parent | d89bea92b31b4e157a0fa438e75370f089f73427 (diff) | |
download | master-31e0f0ae-daec7ad7688415156e2730e401503d09bd3acf91.tar.gz master-31e0f0ae-daec7ad7688415156e2730e401503d09bd3acf91.tar.bz2 master-31e0f0ae-daec7ad7688415156e2730e401503d09bd3acf91.zip |
kernel/3.10: add separate rootfs partition parser
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 38110
Diffstat (limited to 'target/linux/generic/files/drivers')
-rw-r--r-- | target/linux/generic/files/drivers/mtd/mtdsplit_squashfs.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit_squashfs.c b/target/linux/generic/files/drivers/mtd/mtdsplit_squashfs.c new file mode 100644 index 0000000000..7953e8c382 --- /dev/null +++ b/target/linux/generic/files/drivers/mtd/mtdsplit_squashfs.c @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2013 Gabor Juhos <juhosg@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/magic.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/byteorder/generic.h> + +#include "mtdsplit.h" + +static int +mtdsplit_parse_squashfs(struct mtd_info *master, + struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *part; + struct mtd_info *parent_mtd; + size_t part_offset; + size_t squashfs_len; + int err; + + err = mtd_get_squashfs_len(master, 0, &squashfs_len); + if (err) + return err; + + parent_mtd = mtdpart_get_master(master); + part_offset = mtdpart_get_offset(master); + + part = kzalloc(sizeof(*part), GFP_KERNEL); + if (!part) { + pr_alert("unable to allocate memory for \"%s\" partition\n", + ROOTFS_SPLIT_NAME); + return -ENOMEM; + } + + part->name = ROOTFS_SPLIT_NAME; + part->offset = mtd_roundup_to_eb(part_offset + squashfs_len, + parent_mtd) - part_offset; + part->size = master->size - part->offset; + + *pparts = part; + return 1; +} + +static struct mtd_part_parser mtdsplit_squashfs_parser = { + .owner = THIS_MODULE, + .name = "squashfs-split", + .parse_fn = mtdsplit_parse_squashfs, + .type = MTD_PARSER_TYPE_ROOTFS, +}; + +static int +mtdsplit_squashfs_init(void) +{ + return register_mtd_parser(&mtdsplit_squashfs_parser); +} + +subsys_initcall(mtdsplit_squashfs_init); |