PT_LAmb
Guru
Joined: 22 Apr 2002
Posts: 332
Location: Lisboa (Lisbon), Portugal
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 Posted: Tue Aug 23, 2005 7:35 pm Post subject: LVM2+udev+multipath-tools error: can't create runfile |
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Hi,
I use LVM2 to manage all but my swap and root partitions based on The Gentoo LVM2 Installation Guide. Here's mount's output. | Quote: | /dev/hda7 on / type reiserfs (rw,noatime)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
udev on /dev type tmpfs (rw,nosuid)
devpts on /dev/pts type devpts (rw)
/dev/vga/var on /var type reiserfs (rw,noatime)
/dev/vga/tmp on /tmp type reiserfs (rw,noatime)
/dev/vga/usr on /usr type reiserfs (rw,noatime)
/dev/vga/opt on /opt type reiserfs (rw,noatime)
/dev/vga/home on /home type reiserfs (rw,noatime)
/dev/vga/ccache on /var/tmp/ccache type reiserfs (rw,noatime)
/dev/vga/iso on /mnt/iso type reiserfs (rw,noatime)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
none on /proc/bus/usb type usbfs (rw)
none on /dev/shm type tmpfs (rw) |
I migrated my system from devfs to udev yesterday, and during the first boot, I got 20+ error lines. | Quote: | * Populating /dev with device nodes ...
device mapper prerequisites not met.
device mapper prerequisites not met.
device mapper prerequisites not met.
device mapper prerequisites not met.
... |
After searching in multipath-tools' source code, I found that I had to compile Device Mapper Support and Multipath Target built in the kernel. I did it and rebooted to find that the error was replaced by another. | Quote: | * Populating /dev with device nodes ...
can't create runfile
can't create runfile
can't create runfile
can't create runfile
... |
I tweaked multipath/main.c and added a perror("") line right after fprintf(stderr, "can't create runfile\n");. | Code: | int try_lock (char * file)
{
int fd;
struct flock fl;
/*
* create the file to lock if it does not exist
*/
fd = open(file, O_CREAT|O_RDWR);
if (fd < 0) {
fprintf(stderr, "can't create runfile\n");
perror();
exit(1);
}
... |
Hence that file == "/var/run/multipath.run"
As /var is a separated partition, I bound /root/newroot to / with mount / -o bind ~/newroot and checked that /var/run/multipath.run was present. | Quote: | milk linux # ls -la /root/newroot/var/run/
total 0
drwxr-xr-x 2 root root 80 Aug 23 19:11 .
drwxr-xr-x 5 root root 120 Aug 22 19:02 ..
---s--xr-T 1 root root 0 Aug 23 19:11 multipath.run
milk linux # |
deleted it and rebooted the system... | Quote: | * Populating /dev with device nodes ...
can't create runfile
Read-only filesystem
can't create runfile
Read-only filesystem
can't create runfile
Read-only filesystem
can't create runfile
Read-only filesystem
... |
I find that this error is wierd because multipath.run was again present in /var/run.
I just don't know what's happening. If someone could give me a hint, or tell me what else to check, I would be every gratefull.
Should I file this as a bug?
Thanks in advance,
Ricardo
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