mtd flashmap: Switched to calculating the rootfs size rather than depending on being...

Signed-off-by: Daniel Dickinson <daniel@cshore.neomailbox.net>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24834 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch b/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch
index ad7d73a..c1b424d 100644 (file)
--- a/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch
+++ b/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch
@@ -73,7 +73,7 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
 +obj-$(CONFIG_MTD_BCM963XX)    += bcm963xx-flash.o
 --- /dev/null
 +++ b/drivers/mtd/maps/bcm963xx-flash.c
-@@ -0,0 +1,267 @@
+@@ -0,0 +1,314 @@
 +/*
 + * Copyright (C) 2006-2008  Florian Fainelli <florian@openwrt.org>
 + *                        Mike Albon <malbon@openwrt.org>
@@ -101,6 +101,8 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
 +#include <linux/slab.h>
 +#include <linux/vmalloc.h>
 +#include <linux/platform_device.h>
++#include <linux/magic.h>
++#include <linux/jffs2.h>
 +
 +#include <bcm_tag.h>
 +#include <asm/io.h>
@@ -110,6 +112,12 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
 +
 +#define PFX KBUILD_MODNAME ": "
 +
++struct squashfs_super_block {
++      __le32 s_magic;
++      __le32 pad0[9];
++      __le64 bytes_used;
++};
++
 +extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
 +static struct mtd_partition *parsed_parts;
 +
@@ -120,7 +128,6 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
 +       .bankwidth     = BUSWIDTH,
 +};
 +
-+
 +static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
 +{
 +      int nrparts = 3, curpart = 0; /* CFE,NVRAM and global LINUX are always present. */
@@ -131,9 +138,10 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
 +      unsigned int rootfsaddr, kerneladdr, spareaddr;
 +      unsigned int rootfslen, kernellen, sparelen, totallen;
 +      int namelen = 0;
-+      int i;
++      int i, offset;
 +      char *boardid;
-+        char *tagversion;
++    char *tagversion;
++      struct squashfs_super_block sb;
 +
 +      /* Allocate memory for buffer */
 +      buf = vmalloc(sizeof(struct bcm_tag));
@@ -157,9 +165,48 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
 +
 +      kerneladdr = kerneladdr - EXTENDED_SIZE;
 +      rootfsaddr = kerneladdr + kernellen;
++
++      //      offset = master->erasesize + sizeof(struct bcm_tag) + kernellen;
++      offset = rootfsaddr;
++      ret = master->read(master, offset, sizeof(sb), &retlen, (void *) &sb);
++      if (ret || (retlen != sizeof(sb))) {
++        printk(KERN_ALERT PFX "parse_cfe_partitions: error occured while reading "
++                       "from \"%s\"\n", master->name);
++        return -EINVAL;
++      }
++
++      //      if (SQUASHFS_MAGIC != le32_to_cpu(sb.s_magic) ) {
++      printk(KERN_DEBUG PFX "Squash magic %08lx: Found: %08lx\n", (long unsigned int)SQUASHFS_MAGIC, (long unsigned int)le32_to_cpu(sb.s_magic));
++      if ((uint32_t)SQUASHFS_MAGIC != (uint32_t)le32_to_cpu(sb.s_magic) ) {
++        /* Not a squashfs image */
++              printk(KERN_DEBUG PFX "No squashfs image in \"%s\"\n", master->name);
++              printk(KERN_DEBUG PFX "Jffs magic %04x: Found: %04x\n", (uint16_t)(JFFS2_MAGIC_BITMASK), *(uint16_t *)(&sb));
++              if (*(uint16_t *)(&sb) == JFFS2_MAGIC_BITMASK) {
++                printk(KERN_DEBUG PFX "jffs image in \"%s\"\n", master->name);
++                /* Is JFFS2 so have rootfslen so that true length gets calculated */
++                rootfslen = master->size - master->erasesize - offset;
++              } else {
++                /* We only recognize squashfs and jffs2.  If it's not either of these,
++                       don't create a rootfs partition. */
++                printk(KERN_INFO PFX "No known root filesystem in \"%s\"\n", master->name);
++                rootfslen = 0;
++              }
++      } else {
++        /* Is a squash image so find where the squash ends */
++        if (le64_to_cpu((sb.bytes_used)) <= 0) {
++              printk(KERN_ALERT PFX "split_squashfs: squashfs is empty in \"%s\"\n",
++                         master->name);
++              return 0;
++        }
++
++        rootfslen = (u32) le64_to_cpu(sb.bytes_used);
++      }
++
++      rootfslen = ( ( rootfslen % master->erasesize ) > 0 ? (((rootfslen / master->erasesize) + 1 ) * master->erasesize) : rootfslen);
++      totallen = rootfslen + kernellen + sizeof(struct bcm_tag);
++
 +      spareaddr = roundup(totallen, master->erasesize) + master->erasesize;
 +      sparelen = master->size - spareaddr - master->erasesize;
-+      rootfslen = spareaddr - rootfsaddr;
 +
 +      /* Determine number of partitions */
 +      namelen = 8;