2012/8/24 Jonas Gorski <jonas.gorski+open...@gmail.com>: > Hi Rafał, > > On 24 August 2012 23:09, Rafał Miłecki <zaj...@gmail.com> wrote: >> (...) >> # head /dev/mtd4 | hexdump -C >> 00000000 73 68 73 71 2b 03 00 00 00 00 00 54 03 00 00 d8 >> |shsq+......T....| >> (...) >> Can someone explain to me, what does it mean? Is there something wrong >> with my mtdblock4? I don't get anything interesting in dmesg. > > The problem is that Broadcom uses its own "squashfs with lzma"-magic. > The standard squashfs magic is "sqsh" or "hsqs" (depending on > endianess), and Broadcom chose to use a different one (since squashfs3 > does not support storing the compressor type). There is a patch adding > support for unsquashfs in the repo (so you should be able to just > throw a copy of the image at it), but the in-kernel squashfs only > accepts standard squashfs magics.
Ah, OK, thanks a lot! I've managed to track where mounting fails. It's fs/squashfs/super.c::squashfs_fill_super. As you said, it fails at: if (sb->s_magic != SQUASHFS_MAGIC) Unfortunately error wasn't displayed to me, because flag MS_SILENT was set. Backtrace after I put WARN_ON(1): [ 33.984000] ------------[ cut here ]------------ [ 33.988000] WARNING: at fs/squashfs/super.c:126 squashfs_fill_super+0x1a0/0x84c() [ 33.996000] Modules linked in: [ 34.000000] Call Trace: [ 34.004000] [<8025ce80>] dump_stack+0x8/0x34 [ 34.008000] [<80023780>] warn_slowpath_common+0x78/0xa4 [ 34.012000] [<800237c4>] warn_slowpath_null+0x18/0x24 [ 34.016000] [<80103640>] squashfs_fill_super+0x1a0/0x84c [ 34.024000] [<800a7c0c>] mount_bdev+0x14c/0x1cc [ 34.028000] [<801033b0>] squashfs_mount+0x18/0x24 [ 34.032000] [<800a856c>] mount_fs+0x20/0xe4 [ 34.036000] [<800bfaf4>] vfs_kern_mount+0x64/0xe8 [ 34.040000] [<800bfda0>] do_kern_mount+0x48/0xf4 [ 34.048000] [<800c1cc0>] do_mount+0x67c/0x6fc [ 34.052000] [<800c1dcc>] sys_mount+0x8c/0xf0 [ 34.056000] [<8000d1d0>] stack_done+0x20/0x40 [ 34.060000] [ 34.060000] ---[ end trace 088bd3492332a7b0 ]--- -- Rafał _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
