Re: IMQ patch for iptables-1.2.9 and kernel 2.6.2 final !

Linux Advanced Routing and Traffic Control

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Roy,
 "But this stability is probably not because my code is better but  because 
 I don't use egress shaping so the crash reasons still unknown."

I need both ingress and egress traffic shaping, that's why I used the 
classic IMQ version.

> You can try my imq version, which dows not require paching anything
> 
> http://pupa.da.ru/imq
> and I think it should be more stable.
> >
> >
> > Hi,
> > I have successfully applied the IMQ patch for kernel-2.6.2 (final
> > release) from http://www.linuximq.net, and now I have support for 4 IMQ
> > devices loaded in kernel. But I don't know how to patch the iptables-1.2.9
> > to support the -j IMQ target. I tried the patch-o-matic for 2.4.x kernels,
> > but it doesn't work for 2.6.x kernels. I also tried the patch-o-matic-ng
> > for 2.6.x kernels, but when I give the batch script commands it says it's
> > not implemented yet. I don't know how to manually apply the IMQ patches.
> >
> > ./runme --batch userspace/IMQ.patch
> >
> > Could anyone help me how to do this final step and append IMQ support to
> > iptables?
> >
> > --------------------------------------------------------------------------
> -
> >
> > Hi again.
> > I manually patched in the iptables-1.2.9/extensions directory, the files:
> > .IMQ-test
> > .IMQ-test6
> > libip6t-IMQ.c
> > libipt-IMQ.c
> > from the pom-20030625.diff file, and it passed. Now I have the imq devices
> > up and running with kernel-2.6.2, but there is another problem: when I use
> > iptables ..... -j IMQ I got Segmentation fault, and dmesg says:
> >
> > Unable to handle kernel NULL pointer dereference at virtual address
> > 00000001
> >  printing eip:
> > c0372908
> > *pde = 18ddc067
> > Oops: 0000 [#1]
> > CPU:    0
> > EIP:    0060:[<c0372908>]    Not tainted
> > EFLAGS: 00010202
> > EIP is at imq_target+0x8/0x30
> > eax: 00000001   ebx: c045f820   ecx: d8db7c04   edx: c045f820
> > esi: e08170f0   edi: e0817080   ebp: 00000001   esp: d8db7b64
> > ds: 007b   es: 007b   ss: 0068
> > Process iptables (pid: 1648, threadinfo=d8db6000 task=d9e69900)
> > Stack: c03695ee d8db7c04 e0817080 e0817110 00000004 00000001 e0817080
> > d8db7ba8
> >        d8db6000 deff9420 deff9480 00000070 00000000 00000000 00000000
> > 00000163
> >        00000000 00000000 00000000 00000000 00000000 00000000 00000000
> > 00000000
> > Call Trace:
> >  [<c03695ee>] translate_table+0x4be/0x760
> >  [<c0369e13>] do_replace+0x193/0x6e0
> >  [<c0150087>] vfree+0x27/0x40
> >  [<c036a5bd>] do_ipt_set_ctl+0x6d/0x70
> >  [<c03079df>] nf_sockopt+0x12f/0x140
> >  [<c0307a27>] nf_setsockopt+0x37/0x40
> >  [<c032d317>] ip_setsockopt+0x4a7/0xd90
> >  [<c0307964>] nf_sockopt+0xb4/0x140
> >  [<c0307a67>] nf_getsockopt+0x37/0x40
> >  [<c032e281>] ip_getsockopt+0x681/0x7c0
> >  [<c01a2c01>] journal_stop+0x201/0x360
> >  [<c0195d98>] ext3_mark_iloc_dirty+0x28/0x40
> >  [<c0195ed0>] ext3_mark_inode_dirty+0x50/0x60
> >  [<c019a5c4>] __ext3_journal_stop+0x24/0x50
> >  [<c0195f49>] ext3_dirty_inode+0x69/0xd0
> >  [<c0175d1e>] __mark_inode_dirty+0xde/0xf0
> >  [<c013d0f1>] buffered_rmqueue+0xd1/0x170
> >  [<c013d0f1>] buffered_rmqueue+0xd1/0x170
> >  [<c013d22f>] __alloc_pages+0x9f/0x330
> >  [<c013d22f>] __alloc_pages+0x9f/0x330
> >  [<c013939c>] find_get_page+0x2c/0x60
> >  [<c014726a>] do_anonymous_page+0x17a/0x260
> >  [<c01473b5>] do_no_page+0x65/0x3a0
> >  [<c014558b>] pte_alloc_map+0x9b/0xc0
> >  [<c01478f4>] handle_mm_fault+0xd4/0x180
> >  [<c011afec>] do_page_fault+0x2fc/0x4dc
> >  [<c034fce6>] inet_setsockopt+0x36/0x40
> >  [<c02f69e2>] sys_setsockopt+0x82/0xd0
> >  [<c02f7240>] sys_socketcall+0x220/0x2a0
> >  [<c010aa35>] sysenter_past_esp+0x52/0x71
> >
> > Code: 0f b6 00 8b 11 83 c8 80 88 82 94 00 00 00 8b 01 81 88 84 00
> >
> >
> > Does anybody know why it crashes and how can I handle this mess ?
>
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