static struct mtd_partition trx_parts[TRX_MAX_OFFSET];
static struct trx_header trx_hdr;
-static int __init trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
+static int trxsplit_refresh_partitions(struct mtd_info *mtd);
+
+static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
{
size_t retlen;
int err;
return -1;
}
-static int __init trxsplit_create_partitions(void)
+static void trxsplit_findtrx(struct mtd_info *mtd)
{
- struct mtd_partition *part = trx_parts;
- int ret = 0;
- int i;
+ unsigned long offset;
+ unsigned long blocklen;
+ int err;
- if (trx_mtd == NULL)
- goto out;
+ blocklen = mtd->erasesize;
+ if (blocklen < BLOCK_LEN_MIN)
+ blocklen = BLOCK_LEN_MIN;
- printk(KERN_INFO PFX "creating TRX partitions in '%s' (%d,%d)\n",
- trx_mtd->name, MTD_BLOCK_MAJOR, trx_mtd->index);
+ printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
+
+ err = 0;
+ for (offset=0; offset < mtd->size; offset+=blocklen) {
+ err = trxsplit_checktrx(mtd, offset);
+ if (err == 0)
+ break;
+ }
+
+ if (err)
+ return;
+
+ printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset);
+
+ trx_mtd = mtd;
+ trx_offset = offset;
+}
+
+static void trxsplit_create_partitions(struct mtd_info *mtd)
+{
+ struct mtd_partition *part = trx_parts;
+ int err;
+ int i;
for (i=0; i<TRX_MAX_OFFSET;i++) {
part = &trx_parts[i];
for (i=0; i<trx_nr_parts-1; i++) {
trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset;
}
- trx_parts[i].size = trx_mtd->size - trx_parts[i].offset;
+ trx_parts[i].size = mtd->size - trx_parts[i].offset;
i=0;
part = &trx_parts[i];
part = &trx_parts[i];
part->name = "rootfs";
- ret = add_mtd_partitions(trx_mtd, trx_parts, trx_nr_parts);
- if (ret) {
- printk(KERN_ALERT PFX "creating TRX partitions failed\n");
+ err = add_mtd_partitions(mtd, trx_parts, trx_nr_parts);
+ if (err) {
+ printk(KERN_ALERT PFX "adding TRX partitions failed\n");
+ return;
}
-out:
- return ret;
+ mtd->refresh_device = trxsplit_refresh_partitions;
}
-static void __init trxsplit_add_mtd(struct mtd_info *mtd)
+static int trxsplit_refresh_partitions(struct mtd_info *mtd)
{
- unsigned long offset;
- unsigned long blocklen;
- int err;
+ printk(KERN_INFO PFX "refreshing TRX partitions in '%s' (%d,%d)\n",
+ mtd->name, MTD_BLOCK_MAJOR, mtd->index);
- if (trx_mtd)
- return;
+ /* remove old partitions */
+ del_mtd_partitions(mtd);
- blocklen = mtd->erasesize;
- if (blocklen < BLOCK_LEN_MIN)
- blocklen = BLOCK_LEN_MIN;
-
- printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
-
- err = 0;
- for (offset=0; offset < mtd->size; offset+=blocklen) {
- err = trxsplit_checktrx(mtd, offset);
- if (err == 0)
- break;
- }
+ trxsplit_findtrx(mtd);
+ if (!trx_mtd)
+ goto err;
- if (err) {
- printk(KERN_ALERT PFX "no TRX header found\n");
- return;
- }
+ trxsplit_create_partitions(trx_mtd);
+ return 1;
- printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset);
+err:
+ return 0;
+}
- trx_mtd = mtd;
- trx_offset = offset;
+static void __init trxsplit_add_mtd(struct mtd_info *mtd)
+{
+ if (!trx_mtd)
+ trxsplit_findtrx(mtd);
}
static void __init trxsplit_remove_mtd(struct mtd_info *mtd)
.remove = trxsplit_remove_mtd,
};
-static void __init trxsplit_find_trx(void)
+static void __init trxsplit_scan(void)
{
register_mtd_user(&trxsplit_notifier);
unregister_mtd_user(&trxsplit_notifier);
static int __init trxsplit_init(void)
{
- int ret;
+ trxsplit_scan();
- trxsplit_find_trx();
+ if (trx_mtd) {
+ printk(KERN_INFO PFX "creating TRX partitions in '%s' (%d,%d)\n",
+ trx_mtd->name, MTD_BLOCK_MAJOR, trx_mtd->index);
+ trxsplit_create_partitions(trx_mtd);
+ }
- ret = trxsplit_create_partitions();
- return ret;
+ return 0;
}
late_initcall(trxsplit_init);