[mpls-linux-devel] MPLS & linux kernel 2.6.16.2

[Marina M. <mac...@gm...>]

 Hi Mr. Leu, hi everybody,

I'm a Computer Software Engineer student and I'm developing my dissertation
on Load Balancing with MPLS routing.

I'm trying to use the version 1.950 of the MPLS routing, but I'm facing some
configuration problem after compiling the patch from the sources; I kindly
ask you to help me in this phase.

I'm using a Debian distribution with the following items:
 * Linux kernel v. 2.6.16.2
 * iproute2-2.6.16-060323
 * iptables-1.3.5
 * ebtables-v2.0.8-rc2
 * quagga-0.99.4
and, of course, mpls-linux-1.950.

I applied the patches to the kernel in the indicated order; I found some
rejections (.rej), but I "easily" solved them by hands by slightly modifying
the source code (adding header files, removing ".owner"...)

My configuration correctly shows the MPLS module as present; I compiled with
no error and installed the new MPLS-powered kernel.

Despite that, on invoking any MPLS operation (like mpls add nhlfe 0...). I
get this message:
RTNETLINK answers: invalid argument

I'm sure that I'm missing something tremendously obvious!

In the following, the systrace output for "mpls nhlfe add key 0" - hope it
helps.

Thank you in advance for any help.
Best regards,
Marina Mariano

systrace begins....

execve("/sbin/mpls", ["mpls", "nhlfe", "add", "key", "0"], [/* 28 vars */])
= 0
uname({sys="Linux", node="debian", ...}) = 0
brk(0)                                  = 0x8053000
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0xb7f1c000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0777, st_size=55830, ...}) = 0
old_mmap(NULL, 55830, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f0e000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or
directory)
open("/lib/tls/libm.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\00005\0\000"..., 512)
= 512
fstat64(3, {st_mode=S_IFREG|0777, st_size=134496, ...}) = 0
old_mmap(NULL, 136976, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb7eec000
old_mmap(0xb7f0d000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x20000) = 0xb7f0d000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or
directory)
open("/lib/tls/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\220)\0"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0777, st_size=64924, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0xb7eeb000
old_mmap(NULL, 73640, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb7ed9000
old_mmap(0xb7ee8000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0xf000) = 0xb7ee8000
old_mmap(0xb7ee9000, 8104, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7ee9000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or
directory)
open("/lib/tls/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`Z\1\000"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0777, st_size=1254468, ...}) = 0
old_mmap(NULL, 1264780, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb7da4000
old_mmap(0xb7ece000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3,
0x129000) = 0xb7ece000
old_mmap(0xb7ed7000, 7308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7ed7000
close(3)                                = 0
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7eebb80, limit:1048575,
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1,
seg_not_present:0, useable:1}) = 0
munmap(0xb7f0e000, 55830)               = 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=5298, groups=00000000}, [12]) = 0
time(NULL)                              = 1152646179
sendto(3, "\24\0\0\0\22\0\1\3$\374\263D\0\0\0\0\0\200\0\0", 20, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20
recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000},
msg_iov(1)=[{"\344\0\0\0\20\0\2\0$\374\263D\262\24\0\0\0\0\4\3\1\0\0"...,
16384}], msg_controllen=0, msg_flags=0}, 0) = 896
brk(0)                                  = 0x8053000
brk(0x8074000)                          = 0x8074000
brk(0)                                  = 0x8074000
recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000},
msg_iov(1)=[{"\24\0\0\0\3\0\2\0$\374\263D\262\24\0\0\0\0\0\0\1\0\0\0"...,
16384}], msg_controllen=0, msg_flags=0}, 0) = 20
sendmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000},
msg_iov(1)=[{"\204\10\0\0\20\0\1\4%\374\263D\0\0\0\0\36\0\0\0\0\0\0\0"...,
2180}], msg_controllen=0, msg_flags=0}, 0) = 2180
recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000},
msg_iov(1)=[{"$\0\0\0\2\0\0\0%\374\263D\262\24\0\0\352\377\377\377\204"...,
16384}], msg_controllen=0, msg_flags=0}, 0) = 36
dup(2)                                  = 4
fcntl64(4, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb7f1b000
_llseek(4, 0, 0xbf92b508, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
write(4, "RTNETLINK answers: Invalid argum"..., 36) = 36
close(4)                                = 0
munmap(0xb7f1b000, 4096)                = 0
exit_group(2)                           = ?