On Sun, 13 Jun 2010, Dmitry Pryanishnikov wrote:
Hello!
I'm trying to start the experimental NFSv4 server in RELENG_8 w/o
building it into the kernel, as nfsv4(4) suggests:
... or start mountd(8) and nfsd(8) with the ``-e'' option to force use of the
experimental server. The nfsuserd(8) daemon must also be running. This
will occur if
nfs_server_enable="YES"
nfsv4_server_enable="YES"
nfsuserd_enable="YES"
are set in rc.conf(5).
However, mountd fails to start nfsd; the same problem exists when
doing it by hands: "kldload nfsd" gives
kernel: link_elf: symbol svcpool_destroy undefined
error. Can this problem be solved w/o building kernel with "options NFSD"?
Well, if you build a kernel with any of the options that cause "krpc"
to be compiled into the kernel, it works. (I usually test with a GENERIC
kernel that has NFSCLIENT and NFSSERVER defined in it, so nfsd.ko loads
fine.)
Basically "nfsd" is defined as dependent on "nfscommon", then
"nfscommon" is defined as dependent on "krpc" and "nfssvc". This
gets everthing to load, but when it tries to load "nfsd.ko", it
can't find the symbols in "krpc.ko" or "nfssvc.ko" if they weren't
linked into the kernel.
For example, here's what I saw:
nfsv4-laptop# kldstat
Id Refs Address Size Name
1 12 0xc0400000 d1f338 kernel
4 1 0xc2eff000 1e000 nfsclient.ko
5 1 0xc2ea9000 2000 nfs_common.ko
6 2 0xc2f1d000 15000 krpc.ko
11 1 0xc2fe3000 16000 nfscommon.ko
12 1 0xc2fc5000 2000 nfssvc.ko
nfsv4-laptop# nm /boot/nkernel/krpc.ko | fgrep svcpool
0000cdf0 t svcpool_active
0000de40 t svcpool_create
0000e590 t svcpool_destroy
0000e1d0 t svcpool_maxthread_sysctl
0000e2b0 t svcpool_minthread_sysctl
and "nfsd" wouldn't load because it couldn't find "svcpool_destroy",
just like you saw.
If you apply this patch and rebuild the module, it will find the
symbols. (Is that what is supposed to happen or is something broken?)
--- fs/nfsserver/nfs_nfsdport.c.sav 2010-06-12 20:27:53.000000000 -0400
+++ fs/nfsserver/nfs_nfsdport.c 2010-06-12 20:37:09.000000000 -0400
@@ -3147,4 +3147,6 @@
MODULE_VERSION(nfsd, 1);
MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1);
MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1);
+MODULE_DEPEND(nfsd, krpc, 1, 1, 1);
+MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1);
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