From: Gabor Juhos Date: Mon, 17 Nov 2008 09:47:03 +0000 (+0000) Subject: update MyLoader partition parser, add support of named partitions X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=2aaf71e42f0a08b5c0056a09a3f5df5ddb2c830a;p=librecmc%2Flibrecmc.git update MyLoader partition parser, add support of named partitions SVN-Revision: 13255 --- diff --git a/target/linux/adm5120/files/drivers/mtd/myloader.c b/target/linux/adm5120/files/drivers/mtd/myloader.c index 22d076b72c..60ebe22056 100644 --- a/target/linux/adm5120/files/drivers/mtd/myloader.c +++ b/target/linux/adm5120/files/drivers/mtd/myloader.c @@ -17,23 +17,24 @@ #include #include #include - #include #include - #include +#include -#include - -#define NAME_LEN_MAX 20 -#define NAME_MYLOADER "MyLoader" -#define NAME_PARTITION_TABLE "Partition Table" #define BLOCK_LEN_MIN 0x10000 +#define PART_NAME_LEN 32 -int parse_myloader_partitions(struct mtd_info *master, +struct part_data { + struct mylo_partition_table tab; + char names[MYLO_MAX_PARTITIONS][PART_NAME_LEN]; +}; + +int myloader_parse_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long origin) { + struct part_data *buf; struct mylo_partition_table *tab; struct mylo_partition *part; struct mtd_partition *mtd_parts; @@ -45,33 +46,42 @@ int parse_myloader_partitions(struct mtd_info *master, unsigned long offset; unsigned long blocklen; - tab = vmalloc(sizeof(*tab)); - if (!tab) { + buf = vmalloc(sizeof(*buf)); + if (!buf) { return -ENOMEM; goto out; } + tab = &buf->tab; blocklen = master->erasesize; if (blocklen < BLOCK_LEN_MIN) blocklen = BLOCK_LEN_MIN; - /* Partition Table is always located on the second erase block */ offset = blocklen; - printk(KERN_NOTICE "%s: searching for MyLoader partition table at " - "offset 0x%lx\n", master->name, offset); - ret = master->read(master, offset, sizeof(*tab), &retlen, (void *)tab); - if (ret) - goto out; + /* Find the partition table */ + for (i = 0; i < 4; i++, offset += blocklen) { + printk(KERN_DEBUG "%s: searching for MyLoader partition table" + " at offset 0x%lx\n", master->name, offset); + + ret = master->read(master, offset, sizeof(*buf), &retlen, + (void *)buf); + if (ret) + goto out_free_buf; + + if (retlen != sizeof(*buf)) { + ret = -EIO; + goto out_free_buf; + } + + /* Check for Partition Table magic number */ + if (tab->magic == le32_to_cpu(MYLO_MAGIC_PARTITIONS)) + break; - if (retlen != sizeof(*tab)) { - ret = -EIO; - goto out_free_buf; } - /* Check for Partition Table magic number */ if (tab->magic != le32_to_cpu(MYLO_MAGIC_PARTITIONS)) { - printk(KERN_NOTICE "%s: no MyLoader partition table found\n", + printk(KERN_DEBUG "%s: no MyLoader partition table found\n", master->name); ret = 0; goto out_free_buf; @@ -91,7 +101,7 @@ int parse_myloader_partitions(struct mtd_info *master, } mtd_parts = kzalloc((num_parts * sizeof(*mtd_part) + - num_parts * NAME_LEN_MAX), GFP_KERNEL); + num_parts * PART_NAME_LEN), GFP_KERNEL); if (!mtd_parts) { ret = -ENOMEM; @@ -101,21 +111,21 @@ int parse_myloader_partitions(struct mtd_info *master, mtd_part = mtd_parts; names = (char *)&mtd_parts[num_parts]; - strncpy(names, NAME_MYLOADER, NAME_LEN_MAX-1); + strncpy(names, "myloader", PART_NAME_LEN); mtd_part->name = names; mtd_part->offset = 0; - mtd_part->size = blocklen; + mtd_part->size = offset; mtd_part->mask_flags = MTD_WRITEABLE; mtd_part++; - names += NAME_LEN_MAX; + names += PART_NAME_LEN; - strncpy(names, NAME_PARTITION_TABLE, NAME_LEN_MAX-1); + strncpy(names, "partition_table", PART_NAME_LEN); mtd_part->name = names; - mtd_part->offset = blocklen; + mtd_part->offset = offset; mtd_part->size = blocklen; mtd_part->mask_flags = MTD_WRITEABLE; mtd_part++; - names += NAME_LEN_MAX; + names += PART_NAME_LEN; for (i = 0; i < MYLO_MAX_PARTITIONS; i++) { part = &tab->partitions[i]; @@ -123,41 +133,45 @@ int parse_myloader_partitions(struct mtd_info *master, if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE) continue; - sprintf(names, "partition%d", i); + if (buf->names[i][0]) + strncpy(names, buf->names[i], PART_NAME_LEN); + else + snprintf(names, PART_NAME_LEN, "partition%d", i); + mtd_part->offset = le32_to_cpu(part->addr); mtd_part->size = le32_to_cpu(part->size); mtd_part->name = names; mtd_part++; - names += NAME_LEN_MAX; + names += PART_NAME_LEN; } *pparts = mtd_parts; ret = num_parts; -out_free_buf: - vfree(tab); -out: + out_free_buf: + vfree(buf); + out: return ret; } -static struct mtd_part_parser mylo_mtd_parser = { - .owner = THIS_MODULE, - .parse_fn = parse_myloader_partitions, - .name = NAME_MYLOADER, +static struct mtd_part_parser myloader_mtd_parser = { + .owner = THIS_MODULE, + .parse_fn = myloader_parse_partitions, + .name = "MyLoader", }; -static int __init mylo_mtd_parser_init(void) +static int __init myloader_mtd_parser_init(void) { - return register_mtd_parser(&mylo_mtd_parser); + return register_mtd_parser(&myloader_mtd_parser); } -static void __exit mylo_mtd_parser_exit(void) +static void __exit myloader_mtd_parser_exit(void) { - deregister_mtd_parser(&mylo_mtd_parser); + deregister_mtd_parser(&myloader_mtd_parser); } -module_init(mylo_mtd_parser_init); -module_exit(mylo_mtd_parser_exit); +module_init(myloader_mtd_parser_init); +module_exit(myloader_mtd_parser_exit); MODULE_AUTHOR("Gabor Juhos "); MODULE_DESCRIPTION("Parsing code for MyLoader partition tables");