* [2.4.8-ac5 and earlier] fatal mount-problem
@ 2001-08-20 9:37 Andreas Hartmann
2001-08-20 10:03 ` Alexander Viro
0 siblings, 1 reply; 8+ messages in thread
From: Andreas Hartmann @ 2001-08-20 9:37 UTC (permalink / raw)
To: Kernel-Mailingliste
Hello all,
If you mount a device like ide-cdrom with the scsi-emulation turned on
(as modules) and you do the same mount again on the same (not unmounted)
device, the mount-programm hangs up and never comes back. It doesn't
recognize, that the device is allready mounted.
If I do a simple "mount", mount lists the /cdrom - device as mounted.
Problem: if you want to unmount the device, mount tells that the device
would be bussy and ends. So, you've no chance to unmount the device
again. The only way to unmount it, is to do a hardware reset (a normal
reboot doesn't work, because mount hangs at the cdrom-device).
Kernel 2.4.9 is working fine.
> mount --version
mount: mount-2.11h
Regards,
Andreas Hartmann
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 9:37 [2.4.8-ac5 and earlier] fatal mount-problem Andreas Hartmann @ 2001-08-20 10:03 ` Alexander Viro 2001-08-20 11:30 ` Alan Cox 0 siblings, 1 reply; 8+ messages in thread From: Alexander Viro @ 2001-08-20 10:03 UTC (permalink / raw) To: Andreas Hartmann; +Cc: Kernel-Mailingliste On Mon, 20 Aug 2001, Andreas Hartmann wrote: > Hello all, > > > If you mount a device like ide-cdrom with the scsi-emulation turned on > (as modules) and you do the same mount again on the same (not unmounted) > device, the mount-programm hangs up and never comes back. It doesn't > recognize, that the device is allready mounted. strace, please. -ac5 and 2.4.9 have the same code in fs/super.c, so I really wonder what the hell is happening... ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 10:03 ` Alexander Viro @ 2001-08-20 11:30 ` Alan Cox 2001-08-20 11:42 ` Alexander Viro 0 siblings, 1 reply; 8+ messages in thread From: Alan Cox @ 2001-08-20 11:30 UTC (permalink / raw) To: Alexander Viro; +Cc: Andreas Hartmann, Kernel-Mailingliste > > (as modules) and you do the same mount again on the same (not unmounted) > > device, the mount-programm hangs up and never comes back. It doesn't > > recognize, that the device is allready mounted. > > strace, please. -ac5 and 2.4.9 have the same code in fs/super.c, so > I really wonder what the hell is happening... Duplicated here with 2.4.8-ac6 Booted with ide-scsi as the cd driver mount /dev/scd0 /mnt umount /dev/scs0 mount /dev/scd0 /mnt umount /dev/scd0 works fine mount /dev/scd0 /mnt mount /dev/scd0 /mmt hangs (D state) mount /dev/scd0 /mnt mount /dev/scd0 /tmp hangs (D state) ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 11:30 ` Alan Cox @ 2001-08-20 11:42 ` Alexander Viro 2001-08-20 12:30 ` Andreas Hartmann 2001-08-20 22:07 ` mhobgood 0 siblings, 2 replies; 8+ messages in thread From: Alexander Viro @ 2001-08-20 11:42 UTC (permalink / raw) To: Alan Cox; +Cc: Andreas Hartmann, Kernel-Mailingliste On Mon, 20 Aug 2001, Alan Cox wrote: > > > (as modules) and you do the same mount again on the same (not unmounted) > > > device, the mount-programm hangs up and never comes back. It doesn't > > > recognize, that the device is allready mounted. > > > > strace, please. -ac5 and 2.4.9 have the same code in fs/super.c, so Aha. They actually don't (sorry - I was thinking of 2.4.7-ac5), but... > > I really wonder what the hell is happening... > > Duplicated here with 2.4.8-ac6 > Booted with ide-scsi as the cd driver I can't reproduce it with /dev/hda and /dev/hdd (ide-disk and ide-cd resp.) here. I'll build kernel with ide-scsi and see what's going on with that. ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 11:42 ` Alexander Viro @ 2001-08-20 12:30 ` Andreas Hartmann 2001-08-20 13:35 ` [Fix] " Alexander Viro 2001-08-20 22:07 ` mhobgood 1 sibling, 1 reply; 8+ messages in thread From: Andreas Hartmann @ 2001-08-20 12:30 UTC (permalink / raw) To: Alexander Viro; +Cc: Alan Cox, Kernel-Mailingliste Alexander Viro wrote: > > On Mon, 20 Aug 2001, Alan Cox wrote: > > > > > (as modules) and you do the same mount again on the same (not unmounted) > > > > device, the mount-programm hangs up and never comes back. It doesn't > > > > recognize, that the device is allready mounted. > > > > > > strace, please. -ac5 and 2.4.9 have the same code in fs/super.c, so > > Aha. They actually don't (sorry - I was thinking of 2.4.7-ac5), but... > > > I really wonder what the hell is happening... > > > > Duplicated here with 2.4.8-ac6 > > Booted with ide-scsi as the cd driver > > I can't reproduce it with /dev/hda and /dev/hdd (ide-disk and ide-cd resp.) > here. I'll build kernel with ide-scsi and see what's going on with that. andreas@athlon:~ > mount /dev/hda1 on / type reiserfs (rw) proc on /proc type proc (rw) /dev/hda6 on /opt type reiserfs (rw) /dev/hda9 on /usr type reiserfs (rw) /dev/hda8 on /Daten type reiserfs (rw) /dev/hda7 on /home type reiserfs (rw) /dev/hda5 on /var type reiserfs (rw) none on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) /dev/sr1 on /cdrom type iso9660 (ro,noexec,nosuid,nodev) Now the strace after /cdrom has allready been mounted (with ide-scsi turned on) 145 execve("/bin/mount", ["mount", "/cdrom"], [/* 54 vars */]) = 0 145 uname({sys="Linux", node="athlon", ...}) = 0 145 brk(0) = 0x8057840 145 shmat(0, 0x400151b8, 0x1) = ? 145 shmat(1, 0x400151b8, 0x1) = 0xbffff424 145 shmat(2, 0x400151b8, 0x1) = ? 145 access("/etc/suid-debug", F_OK) = -1 ENOENT (No such file or directory) 145 open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory) 145 open("/etc/ld.so.cache", O_RDONLY) = 4 145 SYS_197(0x4, 0xbfffebe4, 0x40014f40, 0x40015164, 0x4) = 0 145 mmap(NULL, 62282, PROT_READ, MAP_PRIVATE, 4, 0) = 0x40016000 145 close(4) = 0 145 open("/lib/libc.so.6", O_RDONLY) = 4 145 read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0X\331\1"..., 1024) = 1024 145 SYS_197(0x4, 0xbfffec2c, 0x40014f40, 0x40015164, 0x4) = 0 145 mmap(NULL, 1195044, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x40026000 145 mprotect(0x40140000, 39972, PROT_NONE) = 0 145 mmap(0x40140000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 4, 0x119000) = 0x40140000 145 mmap(0x40146000, 15396, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40146000 145 close(4) = 0 145 munmap(0x40016000, 62282) = 0 145 brk(0) = 0x8057840 145 brk(0x8057860) = 0x8057860 145 brk(0x8058000) = 0x8058000 145 open("/share/locale/locale.alias", O_RDONLY) = 4 145 SYS_197(0x4, 0xbfffb414, 0x40145a60, 0x4014942c, 0x4) = 0 145 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40016000 145 read(4, "# Locale name alias data base.\n#"..., 4096) = 2601 145 brk(0x8059000) = 0x8059000 145 read(4, "", 4096) = 0 145 close(4) = 0 145 munmap(0x40016000, 4096) = 0 145 open("/lib/locale/de_DE/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) 145 open("/lib/locale/de/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) 145 open("/dev/null", O_RDWR|O_LARGEFILE) = 4 145 close(4) = 0 145 SYS_199(0x40144d40, 0x2, 0x40145a60, 0x40143490, 0xbffff898) = 1001 145 semop(0x40144d40, 0x2, 0x40145a60, 0x40143490) = 0 145 SYS_196(0x8053c40, 0xbffff79c, 0x40145a60, 0x4014942c, 0x8053c40) = 0 145 brk(0x805b000) = 0x805b000 145 readlink("/cdrom", 0xbfffe7dc, 4095) = -1 EINVAL (Invalid argument) 145 open("/etc/fstab", O_RDONLY|O_LARGEFILE) = 4 145 SYS_197(0x4, 0xbffff588, 0x40145a60, 0x4014942c, 0x4) = 0 145 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40016000 145 read(4, "/dev/hda2 /boot "..., 4096) = 1702 145 read(4, "", 4096) = 0 145 close(4) = 0 145 munmap(0x40016000, 4096) = 0 145 SYS_195(0xbffff670, 0xbffff610, 0x40145a60, 0x4014942c, 0xbffff670) = -1 ENOENT (No such file or directory) 145 rt_sigprocmask(SIG_BLOCK, ~[TRAP SEGV], NULL, 8) = 0 145 SYS_195(0x8059bb8, 0xbfffe3b0, 0x40145a60, 0x4014942c, 0x8059bb8) = 0 145 open("/dev/sr1", O_RDONLY|O_LARGEFILE) = 4 145 _llseek(4, 1024, [1024], SEEK_SET) = 0 145 read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 228) = 228 145 _llseek(4, 65536, [65536], SEEK_SET) = 0 145 read(4, "~\0\301\360\0\0\0\0\360\301K\7\t\0\0\t\7Ke\5\20\2\25;\10"..., 228) = 228 145 _llseek(4, 8192, [8192], SEEK_SET) = 0 145 read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 228) = 228 145 _llseek(4, 0, [0], SEEK_SET) = 0 145 read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 576) = 576 145 _llseek(4, 8192, [8192], SEEK_SET) = 0 145 read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 1376) = 1376 145 _llseek(4, 32768, [32768], SEEK_SET) = 0 145 read(4, "\1CD001\1\0LINUX "..., 2048) = 2048 145 close(4) = 0 145 mount("/dev/sr1", "/cdrom", "iso9660", MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|0xc0ed0000, 0x8059c18 sorry, but I couldn't get any more output. Regards, Andreas Hartmann ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Fix] Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 12:30 ` Andreas Hartmann @ 2001-08-20 13:35 ` Alexander Viro 2001-08-21 17:07 ` Andreas Hartmann 0 siblings, 1 reply; 8+ messages in thread From: Alexander Viro @ 2001-08-20 13:35 UTC (permalink / raw) To: Andreas Hartmann; +Cc: Alan Cox, Kernel-Mailingliste Alan, please apply. sync_dev() in ->release() is 100% bogus - all flushing the stuff out is done by callers (blkdev_close() et.al.). --- AC8-7/drivers/scsi/sr.c Sun Jul 29 01:54:47 2001 +++ linux/drivers/scsi/sr.c Mon Aug 20 09:25:39 2001 @@ -101,7 +101,6 @@ { if (scsi_CDs[MINOR(cdi->dev)].device->sector_size > 2048) sr_set_blocklength(MINOR(cdi->dev), 2048); - sync_dev(cdi->dev); scsi_CDs[MINOR(cdi->dev)].device->access_count--; if (scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module) __MOD_DEC_USE_COUNT(scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module); ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Fix] Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 13:35 ` [Fix] " Alexander Viro @ 2001-08-21 17:07 ` Andreas Hartmann 0 siblings, 0 replies; 8+ messages in thread From: Andreas Hartmann @ 2001-08-21 17:07 UTC (permalink / raw) To: Alexander Viro; +Cc: Kernel-Mailingliste Alexander Viro wrote: > > Alan, please apply. sync_dev() in ->release() is 100% bogus - all flushing > the stuff out is done by callers (blkdev_close() et.al.). [...] It's working fine in 2.4.8ac8 :-) . Thank you very much! Regards, Andreas Hartmann ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [2.4.8-ac5 and earlier] fatal mount-problem 2001-08-20 11:42 ` Alexander Viro 2001-08-20 12:30 ` Andreas Hartmann @ 2001-08-20 22:07 ` mhobgood 1 sibling, 0 replies; 8+ messages in thread From: mhobgood @ 2001-08-20 22:07 UTC (permalink / raw) To: linux-kernel On a plain vanilla 2.4.7 using ide-scsi driver it works okay on the double mount, and returns device busy. It will however segfault if you try to mount scd0 with no media in the drive. Cordially, Mike Hobgood On Mon, Aug 20, 2001 at 07:42:24AM -0400, Alexander Viro wrote: > > > On Mon, 20 Aug 2001, Alan Cox wrote: > > > > > (as modules) and you do the same mount again on the same (not unmounted) > > > > device, the mount-programm hangs up and never comes back. It doesn't > > > > recognize, that the device is allready mounted. > > > > > > strace, please. -ac5 and 2.4.9 have the same code in fs/super.c, so > > Aha. They actually don't (sorry - I was thinking of 2.4.7-ac5), but... > > > I really wonder what the hell is happening... > > > > Duplicated here with 2.4.8-ac6 > > Booted with ide-scsi as the cd driver > > I can't reproduce it with /dev/hda and /dev/hdd (ide-disk and ide-cd resp.) > here. I'll build kernel with ide-scsi and see what's going on with that. > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2001-08-21 17:27 UTC | newest] Thread overview: 8+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2001-08-20 9:37 [2.4.8-ac5 and earlier] fatal mount-problem Andreas Hartmann 2001-08-20 10:03 ` Alexander Viro 2001-08-20 11:30 ` Alan Cox 2001-08-20 11:42 ` Alexander Viro 2001-08-20 12:30 ` Andreas Hartmann 2001-08-20 13:35 ` [Fix] " Alexander Viro 2001-08-21 17:07 ` Andreas Hartmann 2001-08-20 22:07 ` mhobgood
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