[Xorp-users] OSPF Hello messages not exchanged after some period, and link status becomes dead
Dejan Petkovic
dexpetkovic at gmail.com
Wed Mar 24 16:41:37 PDT 2010
On Wed, Mar 24, 2010 at 12:38 AM, Ben Greear <greearb at candelatech.com> wrote:
> On 03/23/2010 03:49 PM, Dejan Petkovic wrote:
>
>> Hi Ben,
>>
>> the thing is, when the routers on both nodes are in down mode, the
>> suggested commands can not be executed on the nodes. They simply do
>> not return any result, i.e. I have to break the command. However,
>> after I kill xorp rtrmgr script on both nodes, I get the below output
>> from the suggested commands. The XORP version I use is 1.6.
>
> You mean that the linux command line hangs while xorp is in the broken
> state?
>
> If so, it's probably a kernel bug of some sort (something probably holds
> the netdev list lock or similar).
>
> Please show me the strace output from one of the blocking commands:
> strace ip route show
>
> What Linux kernel version are you using?
>
> If you run strace or gdb against the xorp-fea process, can you see
> if it's hung in any particular system call?
>
> Can you use a newer version of OpenVZ, or maybe try to replicate
> using something other than openVZ?
>
> Also, 1.6 is not under active development...please try xorp.ct:
> http://www.candelatech.com/oss/xorp-ct.html
>
> Thanks,
> Ben
>
> --
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc http://www.candelatech.com
>
Hello Ben,
I am using 2.6.18-164.11.1.el5.028stab068.3 CentOS 5 kernel, modified
with OpenVZ version 028stab068.3.
This is the latest version of OpenVZ as far as I know, and I need to
use OpenVZ for my project so I am rather stuck there.
Yes, linux command line hangs when issuing the suggested commands
while xorp is in "blocked" state.
Perhaps the fact that I am using veth interfaces instead of venet
interfaces is the reason for the issue? However, since I have to use
bridging in order to simulate the phy links between the routers I am
not sure if venet would work for me.
When I run strace against the xorp-fea process, I do not see it is
hanged at any system call. It always displays this message in both
servers, in the bottom of the screen, i.e. this message always repeats
but the process is not hanged as other messages appear there:
select(41, [9 10 11 12 13 14 15 16 17 18 19 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 40], [], [], {0, 0}) = 0 (Timeout)
So, here is the strace output of the commands. Please note that I had
to break out of every command as the command line hanged after
displaying the output. Any clues...?
I will read the documentation of the xorpct, and try to integrate it
into openvz containers to test with it.
Thanks a lot again,
Dejan
[root at srv1 /]# strace ip ru show
execve("/sbin/ip", ["ip", "ru", "show"], [/* 16 vars */]) = 0
brk(0) = 0x9bb5000
uname({sys="Linux", node="srv1.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7fa2000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fa1000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x512000
mmap2(0x521000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0x521000
mmap2(0x523000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x523000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x35d000
mprotect(0x49c000, 4096, PROT_NONE) = 0
mmap2(0x49d000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0x49d000
mmap2(0x4a0000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4a0000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fa0000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7fa06c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x49d000, 8192, PROT_READ) = 0
mprotect(0x521000, 4096, PROT_READ) = 0
mprotect(0x9fa000, 4096, PROT_READ) = 0
munmap(0xb7fa2000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7651, groups=00000000}, [12]) = 0
time(NULL) = 1269473377
sendto(3, "\24\0\0\0\"\0\1\3b\240\252K\0\0\0\0\2\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
[root at srv1 /]# strace ip route show
execve("/sbin/ip", ["ip", "route", "show"], [/* 16 vars */]) = 0
brk(0) = 0x98f8000
uname({sys="Linux", node="srv1.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7fee000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fed000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0xc63000
mmap2(0xc72000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0xc72000
mmap2(0xc74000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xc74000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x4cb000
mprotect(0x60a000, 4096, PROT_NONE) = 0
mmap2(0x60b000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0x60b000
mmap2(0x60e000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x60e000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fec000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7fec6c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x60b000, 8192, PROT_READ) = 0
mprotect(0xc72000, 4096, PROT_READ) = 0
mprotect(0x6ee000, 4096, PROT_READ) = 0
munmap(0xb7fee000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7699, groups=00000000}, [12]) = 0
time(NULL) = 1269473695
sendto(3, "\24\0\0\0\22\0\1\3\240\241\252K\0\0\0\0\0\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
[root at srv1 /]# strace ip addr show
execve("/sbin/ip", ["ip", "addr", "show"], [/* 16 vars */]) = 0
brk(0) = 0x8d98000
uname({sys="Linux", node="srv1.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f02000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f01000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0xfac000
mmap2(0xfbb000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0xfbb000
mmap2(0xfbd000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xfbd000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x7f5000
mprotect(0x934000, 4096, PROT_NONE) = 0
mmap2(0x935000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0x935000
mmap2(0x938000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x938000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f00000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f006c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x935000, 8192, PROT_READ) = 0
mprotect(0xfbb000, 4096, PROT_READ) = 0
mprotect(0xa3b000, 4096, PROT_READ) = 0
munmap(0xb7f02000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7735, groups=00000000}, [12]) = 0
time(NULL) = 1269473749
sendto(3, "\24\0\0\0\22\0\1\3\326\241\252K\0\0\0\0\0\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
root at srv1 /]# strace ip neigh show
execve("/sbin/ip", ["ip", "neigh", "show"], [/* 16 vars */]) = 0
brk(0) = 0x8189000
uname({sys="Linux", node="srv1.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7fde000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fdd000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0xaf0000
mmap2(0xaff000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0xaff000
mmap2(0xb01000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb01000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x170000
mprotect(0x2af000, 4096, PROT_NONE) = 0
mmap2(0x2b0000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0x2b0000
mmap2(0x2b3000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b3000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fdc000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7fdc6c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x2b0000, 8192, PROT_READ) = 0
mprotect(0xaff000, 4096, PROT_READ) = 0
mprotect(0x16e000, 4096, PROT_READ) = 0
munmap(0xb7fde000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7741, groups=00000000}, [12]) = 0
time(NULL) = 1269473773
sendto(3, "\24\0\0\0\22\0\1\3\356\241\252K\0\0\0\0\0\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
[root at srv2 /]# strace ip ru show
execve("/sbin/ip", ["ip", "ru", "show"], [/* 16 vars */]) = 0
brk(0) = 0x866c000
uname({sys="Linux", node="srv2.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f23000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f22000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x410000
mmap2(0x41f000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0x41f000
mmap2(0x421000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x421000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0xce6000
mprotect(0xe25000, 4096, PROT_NONE) = 0
mmap2(0xe26000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0xe26000
mmap2(0xe29000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xe29000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f21000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f216c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xe26000, 8192, PROT_READ) = 0
mprotect(0x41f000, 4096, PROT_READ) = 0
mprotect(0xf8d000, 4096, PROT_READ) = 0
munmap(0xb7f23000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7743, groups=00000000}, [12]) = 0
time(NULL) = 1269473801
sendto(3, "\24\0\0\0\"\0\1\3\n\242\252K\0\0\0\0\2\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
root at srv2 /]# strace ip route show
execve("/sbin/ip", ["ip", "route", "show"], [/* 16 vars */]) = 0
brk(0) = 0x83a2000
uname({sys="Linux", node="srv2.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f14000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f13000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x163000
mmap2(0x172000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0x172000
mmap2(0x174000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x174000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x28e000
mprotect(0x3cd000, 4096, PROT_NONE) = 0
mmap2(0x3ce000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0x3ce000
mmap2(0x3d1000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3d1000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f12000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f126c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x3ce000, 8192, PROT_READ) = 0
mprotect(0x172000, 4096, PROT_READ) = 0
mprotect(0xe16000, 4096, PROT_READ) = 0
munmap(0xb7f14000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7745, groups=00000000}, [12]) = 0
time(NULL) = 1269473824
sendto(3, "\24\0\0\0\22\0\1\3!\242\252K\0\0\0\0\0\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
[root at srv2 /]# strace ip addr show
execve("/sbin/ip", ["ip", "addr", "show"], [/* 16 vars */]) = 0
brk(0) = 0x9289000
uname({sys="Linux", node="srv2.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f48000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f47000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x110000
mmap2(0x11f000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0x11f000
mmap2(0x121000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x121000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0xa53000
mprotect(0xb92000, 4096, PROT_NONE) = 0
mmap2(0xb93000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0xb93000
mmap2(0xb96000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb96000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f46000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f466c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xb93000, 8192, PROT_READ) = 0
mprotect(0x11f000, 4096, PROT_READ) = 0
mprotect(0x1e0000, 4096, PROT_READ) = 0
munmap(0xb7f48000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7747, groups=00000000}, [12]) = 0
time(NULL) = 1269473838
sendto(3, "\24\0\0\0\22\0\1\3/\242\252K\0\0\0\0\0\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
[root at srv2 /]# strace ip neigh show
execve("/sbin/ip", ["ip", "neigh", "show"], [/* 16 vars */]) = 0
brk(0) = 0x8800000
uname({sys="Linux", node="srv2.dex.net", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17705, ...}) = 0
mmap2(NULL, 17705, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f6d000
close(3) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300
\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=74616, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f6c000
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x9ec000
mmap2(0x9fb000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0x9fb000
mmap2(0x9fd000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x9fd000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340_\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1608148, ...}) = 0
mmap2(NULL, 1332676, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0xd75000
mprotect(0xeb4000, 4096, PROT_NONE) = 0
mmap2(0xeb5000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13f) = 0xeb5000
mmap2(0xeb8000, 9668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xeb8000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f6b000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f6b6c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xeb5000, 8192, PROT_READ) = 0
mprotect(0x9fb000, 4096, PROT_READ) = 0
mprotect(0x937000, 4096, PROT_READ) = 0
munmap(0xb7f6d000, 17705) = 0
socket(PF_NETLINK, SOCK_RAW, 0) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [32768], 4) = 0
bind(3, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, pid=7751, groups=00000000}, [12]) = 0
time(NULL) = 1269473855
sendto(3, "\24\0\0\0\22\0\1\3@\242\252K\0\0\0\0\0\0\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3,
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