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[Solved] iscsi-target problem on hardened-3.2.2-r1
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SnEptUne
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Joined: 23 Aug 2004
Posts: 651

PostPosted: Wed Apr 11, 2012 2:44 am    Post subject: [Solved] iscsi-target problem on hardened-3.2.2-r1 Reply with quote

Hi all,

This post is just to share a iscsi-problem I had when using the svn truck iscsi-target from https://iscsitarget.svn.sourceforge.net/svnroot/iscsitarget

Firstly, the kernel module failed during compilation with the following error:

Code:

iscsitarget/trunk/kernel/wthread.c: In function ‘worker_thread’:
iscsitarget/trunk/kernel/wthread.c:74:3: error: implicit declaration of function ‘get_task_io_context’
iscsitarget/trunk/kernel/wthread.c:74:21: warning: assignment makes pointer from integer without a cast
make[2]: *** [iscsitarget/trunk/kernel/wthread.o] Error 1
make[1]: *** [_module_/home/wltsang/iscsitarget/trunk/kernel] Error 2


This is fixed by applying the patch:
Code:

patch -p1 < patches/compat-2.6.39-3.2.patch
patching file kernel/wthread.c



But now, after the kernel module has been compiled successfully, the module will not load. It simply returns "Cannot allocate memory" without any error.

After some debugging, I found the following change is required to load the module in hardened-3.2.2-r1:

Code:

int event_init(void)
{
-        nl = netlink_kernel_create(&init_net, NETLINK_IET, 1, event_recv_skb,
+       nl = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, event_recv_skb,
                                   NULL, THIS_MODULE);



After this change, the module loads fine without issue so far.
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VoVaN
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Joined: 02 Jul 2003
Posts: 666
Location: The Netherlands

PostPosted: Thu May 03, 2012 10:19 am    Post subject: Reply with quote

Thanks you for the tip! I had the same problem when tried to upgrade iscsi with the new kernel...
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SnEptUne
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Joined: 23 Aug 2004
Posts: 651

PostPosted: Thu May 03, 2012 11:22 am    Post subject: Reply with quote

No problem. But I found that there is a better way, which is to update iet_u.h:

Code:

#define NETLINK_IET     23


It is because number 21 is already used by CRC32
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