Well I've been thought about this too, but I used modprobe to install the
kernel module while right after make and make install and make module_install,
is that OK?
If I have to use insmode, shoulde I go to the openvswitch/datapath/linux/
directory and use insmod openvswitch.ko?
also when I make modules_install there is something I can't understand:
root@sdcn-ProLiant-DL380p-Gen8:~/openvswitch-2.3.1# make modules_install
cd datapath/linux && make modules_install
make[1]: 正在进入目录 `/root/openvswitch-2.3.1/datapath/linux'
make -C /lib/modules/3.11.0-15-generic/build
M=/root/openvswitch-2.3.1/datapath/linux modules_install
make[2]: 正在进入目录 `/usr/src/linux-headers-3.11.0-15-generic'
INSTALL /root/openvswitch-2.3.1/datapath/linux/openvswitch.ko
Can't read private key
DEPMOD 3.11.0-15-generic
make[2]:正在离开目录 `/usr/src/linux-headers-3.11.0-15-generic'
depmod `sed -n 's/#define UTS_RELEASE "\([^"]*\)"/\1/p'
/lib/modules/3.11.0-15-generic/build/include/generated/utsrelease.h`
make[1]:正在离开目录 `/root/openvswitch-2.3.1/datapath/linux'
Why is there a "Can't read private key DEPMOD 3.11.0-15-generic"?Does this
mean that modules installed failed?
Sorry for so many questions. And Thank you for replying. Have a nice weekend!
祝好，
刘畅
From: Jesse Gross
Date: 2015-09-18 23:46
To: [email protected]
CC: dev
Subject: Re: Re: [ovs-dev] How to debug openvswitch
>This looks fine, so my guess is that you aren't actually inserting the
>new kernel module with this code. You should be sure that you use
>insmod to load the file that you compiled
>On Thu, Sep 17, 2015 at 10:22 PM, [email protected]
><[email protected]> wrote:
>> Oh I'm sorry for dropping the mailing list.
>>
>> I think I do put the printk in the packet processing path. I am going to
>> describe what I did below:
>>
>> I put printk in the function ovs_vport_recieve() in vport.c, in
>> ovs_dp_process_recieved_packet() in datapath.c, in ovs_flow_key_extract()
>> and key_extract() in flow.c
>> Here is what I put in the vport.c file, the italic and bold code is what I
>> added, just a test code.
>> void ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
>> struct ovs_key_ipv4_tunnel *tun_key)
>> {
>> struct pcpu_sw_netstats *stats;
>>
>> stats = this_cpu_ptr(vport->percpu_stats);
>>
>> u64_stats_update_begin(&stats->syncp);
>> stats->rx_packets++;
>> stats->rx_bytes += skb->len;
>> u64_stats_update_end(&stats->syncp);
>> pr_info("*****This is in ovs_vport_recieve() function*****\n");
>> pr_info("Packet recieved.\n");
>> pr_info("*****End of this test place*****\n");
>> OVS_CB(skb)->tun_key = tun_key;
>> ovs_dp_process_received_packet (vport, skb);
>> }
>> There is function pr_info in the posted code, but I do tried printk first
>> and it did not work so I try this. I also define the macro #define
>> pr_fmt(fmt) KBUILD_MODNAME ": " fmt at the first of these files.
>> BTW, the ovs version I use is ovs-2.3.1, my OS is Ubuntu 12.04.
>>
>> I am really appreciate for your reply and I am looking forward to your
>> opinion.
>> Thanks a lot!
>> Chang
>> ________________________________
>> 祝好，
>> 刘畅
>>
>>
>> From: Jesse Gross
>> Date: 2015-09-18 00:34
>> To: [email protected]
>> CC: [email protected]
>> Subject: Re: [ovs-dev] How to debug openvswitch
>> On Thursday, September 17, 2015, [email protected]
>> <[email protected]> wrote:
>>>
>>> Thanks a lot for your reply!
>>> But I have tried this command many times, what I saw was something like
>>> "br0 is left/enter promiscuous mode" which occures when I use ovs-vsctl
>>> add-br or ovs-vsctl add-port commands.
>>> If there any tips of the methods or functions I can use to see the kernel
>>> output information? I've tried printk() and pr_info() in datapath.c, flow.c
>>> and vport.c, but they didn't work.
>>> What I want is let ovs output some information to the console (or log file
>>> is OK) when the datapath recieves and processes packets.
>>
>>
>> Please don't drop the mailing list.
>>
>> printk should output to dmesg. Without seeing the code, it's impossible to
>> know why it is not showing up. Are you sure that you put the printk in a
>> location on the packet processing path?
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