Looking at the examples in cluster/dlm/tests/usertest/ I think that you'll
wan't dlm_ls_pthread_init() and not dlm_pthread_init() after you've
created your lockspace.
Ok, so I'm further ahead. I created my own lockspace with a program like this.
[ejohnson@gfsa01:~/projects/dlm-simple] cat bar.cpp
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
extern "C" {
#include <libdlm.h>
}
#include <pthread.h>
main(int argc, char **argv)
{
printf("hello world\n");
char lockName[] = "foobar" ;
dlm_lshandle_t *lockspace=0;
lockspace=(dlm_lshandle_t*)dlm_create_lockspace("EEJ_TESTING_LOCKSPACE",0777);
printf("lockspace result: %X\n",lockspace);
}
And I can verify that it really produced something. Because I see this...
[ejohnson@gfsa01:/proc/cluster] cat services
Service Name GID LID State Code
Fence Domain: "default" 1 2 run -
[3 2 1]
DLM Lock Space: "clvmd" 2 3 run -
[3 2 1]
DLM Lock Space: "GFS1" 4 4 run -
[3 2 1]
DLM Lock Space: "EEJ_TESTING_LOCKSPACE" 9 7 run -
[1]
GFS Mount Group: "GFS1" 5 5 run -
[3 2 1]
User: "usrm::manager" 3 6 run -
[3 2 1]
And, I can see this too...
[ejohnson@gfsa01:/dev/misc] ls -asl
total 0
0 drwxr-xr-x 2 root root 100 Nov 3 13:50 ./
0 drwxr-xr-x 13 root root 5700 Nov 3 13:50 ../
0 crw------- 1 root root 10, 62 Aug 30 16:07 dlm-control
0 crwxr-xr-x 1 root root 10, 60 Nov 3 13:50 dlm_EEJ_TESTING_LOCKSPACE
0 crw------- 1 root root 10, 61 Aug 30 16:07 dlm_clvmd
So I must be getting closer!
BUT - note the permissions on the dlm_EEJ* "file". Not quite the 777
I had supplied in dlm_create_lockspace. Hmpf. Is that good?
I wonder if that explains why this program still gets a null returned
from dlm_open_lockspace.
[ejohnson@gfsa01:~/projects/dlm-simple] cat foo.cpp
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
extern "C" {
#include <libdlm.h>
}
#include <pthread.h>
main(int argc, char **argv)
{
printf("hello world\n");
char lockName[] = "foobar" ;
dlm_lshandle_t *lockspace=0;
lockspace=(dlm_lshandle_t*)dlm_open_lockspace("EEJ_TESTING_LOCKSPACE");
printf("Lockspace: %X\n",lockspace);
int initStatus = dlm_ls_pthread_init(lockspace);
printf("initStatus: %d, errno: %d\n",initStatus,errno);
return 1;
}
[ejohnson@gfsa01:~/projects/dlm-simple] ./foo
hello world
Lockspace: 0
Segmentation fault (core dumped)
Still feels like I need root somewhere along the way. OR - my gfs
arrangement is hopelessly misconfigured and I need to be told RTFM.
-Eric
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