Hi,
I had a similar problem on the BT Home Hub 2B, which also
has nand flash. The problem as you say seems to be that
mount_root assume that the deadc0de will be at the start
of the block where it would be for nor flash. I expect others
will have a better idea of the right way to solve this (perhaps
avoiding using squashfs on nand completely) but for the moment
I have I got round the problem by patching ubox mount_root.c
as follows.
I have also had to add to modify include/image.mk, adding 16K
(which is the erase block size on the HH2B) to the call to padjffs2.
Ben
--- a/mount_root.c 2014-01-18 10:19:12.319136947 +0100
+++ b/mount_root.c 2014-01-18 10:18:21.149945597 +0100
@@ -381,6 +381,13 @@
return FS_JFFS2;
}
+ if (type == MTD_TYPE_NAND &&
+ deadc0de == 0xffffffff) {
+
+ LOG("jffs2 is ready\n");
+ return FS_JFFS2;
+ }
+
ERROR("No jffs2 marker was found\n");
return FS_NONE;
On Fri, 2014-02-07 at 03:00 +0100, Marco Antonio Mauro wrote:
> Hi,
>
> the router I'm working on at the moment, the DGN3500 lantiq platform,
> has a strange issue: it won't create or save the configuration. I see
> this in the logs:
>
> [ 0.000000] Linux version 3.10.26 (marcus905@experiment) (gcc
> version 4.6.4 (OpenWrt/Linaro GCC 4.6-2013.05 r39286) ) #39 Thu Feb 6
> 19:19:14 CET 2014
> [ 0.000000] SoC: AR9 rev 1.1
> [ 0.000000] bootconsole [early0] enabled
> [ 0.000000] CPU revision is: 0001954c (MIPS 34Kc)
> [ 0.000000] MIPS: machine is DGN3500 - Netgear DGN3500
> [ 0.000000] Determined physical RAM map:
> [ 0.000000] memory: 04000000 @ 00000000 (usable)
> [ 0.000000] Initrd not found or empty - disabling initrd
> [ 0.000000] Zone ranges:
> [ 0.000000] Normal [mem 0x00000000-0x03ffffff]
> [ 0.000000] Movable zone start for each node
> [ 0.000000] Early memory node ranges
> [ 0.000000] node 0: [mem 0x00000000-0x03ffffff]
> [ 0.000000] On node 0 totalpages: 16384
> [ 0.000000] free_area_init_node: node 0, pgdat 8034e9d0,
> node_mem_map 81002a80
> [ 0.000000] Normal zone: 128 pages used for memmap
> [ 0.000000] Normal zone: 0 pages reserved
> [ 0.000000] Normal zone: 16384 pages, LIFO batch:3
> [ 0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
> [ 0.000000] Primary data cache 16kB, 4-way, VIPT, no aliases,
> linesize 32 bytes
> [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
> [ 0.000000] pcpu-alloc: [0] 0
> [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
> Total pages: 16256
> [ 0.000000] Kernel command line: console=ttyLTQ0,115200 init=/etc/preinit
> ...
> [ 0.248000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
> [ 0.256000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME)
> (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
> ...
> [ 0.304000] spi_gpio spi.4: master is unqueued, this is deprecated
> [ 0.312000] m25p80 spi32766.0: found mx25l12805d, expected s25fl129p0
> [ 0.316000] m25p80 spi32766.0: mx25l12805d (16384 Kbytes)
> [ 0.320000] 4 ofpart partitions found on MTD device spi32766.0
> [ 0.328000] Creating 4 MTD partitions on "spi32766.0":
> [ 0.332000] 0x000000000000-0x000000010000 : "uboot"
> [ 0.340000] 0x000000010000-0x000000020000 : "uboot-env"
> [ 0.348000] 0x000000020000-0x000000030000 : "calibration"
> [ 0.352000] 0x000000050000-0x000000ff0000 : "firmware"
> [ 0.360000] 0x00000017c7c8-0x000000ff0000 : "rootfs"
> [ 0.364000] mtd: partition "rootfs" must either start or end on
> erase block boundary or be smaller than an erase block -- forcing
> read-only
> [ 0.380000] mtd: device 4 (rootfs) set to be root filesystem
> [ 0.384000] mtd: partition "rootfs_data" created automatically,
> ofs=0x730000, len=0x8c0000
> [ 0.392000] 0x000000730000-0x000000ff0000 : "rootfs_data"
> ...
> [ 160.680000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000000: 0x7345 instead
> [ 160.696000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000004: 0x6f4d instead
> [ 160.712000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x0000000c: 0x5035 instead
> [ 160.728000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000010: 0x3600 instead
> [ 160.744000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x0000002c: 0x0041 instead
> [ 160.760000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000030: 0x3200 instead
> [ 160.776000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000038: 0x0011 instead
> [ 160.792000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000040: 0x4572 instead
> [ 160.808000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000044: 0x4d6d instead
> [ 160.824000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985
> not found at 0x00000048: 0x3845 instead
> [ 160.832000] jffs2: Further such events for this erase block will
> not be printed
> [ 160.948000] jffs2: Empty flash at 0x00000050 ends at 0x00001000
> [ 161.072000] jffs2: Empty flash at 0x00001004 ends at 0x00002000
> [ 163.168000] jffs2_scan_eraseblock(): End of filesystem marker found
> at 0x10000
> [ 163.176000] jffs2: Cowardly refusing to erase blocks on filesystem
> with no valid JFFS2 nodes
> [ 163.180000] jffs2: empty_blocks 139, bad_blocks 0, c->nr_blocks 140
>
> What could the problem be? What should I check?
>
> I think that it's creating rootfs_data in the correct place, but then
> the jffs2 filesystem starts looking for the end marker (deadc0de if i
> recall correctly) in the wrong place and therefore leaving the
> partition unformatted and leaving the config in the ramdisk.
>
> Any idea?
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