Date: Wed, 22 Jan 2003 10:30:03 -0800 (PST) From: Stas Kysel <stas_k_freebsd@tiger.unisquad.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/39043: Corrupted files on a FAT32 partition Message-ID: <200301221830.h0MIU3na082002@freefall.freebsd.org>
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The following reply was made to PR kern/39043; it has been noted by GNATS.
From: Stas Kysel <stas_k_freebsd@tiger.unisquad.com>
To: freebsd-gnats-submit@FreeBSD.org, kesor@ulp.co.il
Cc:
Subject: Re: kern/39043: Corrupted files on a FAT32 partition
Date: Wed, 22 Jan 2003 20:21:10 +0200
Hi.
Looks like samba guys are right - this is a bug in kernel, not in samba or
windows :(
ktrace/kdump shows that file (which appears corrupt on disk) was:
1. opened: CALL open(0x81c1220,0xa02,0x1f4)
2. truncated: CALL ftruncate(0x13,0,0xbb0fb,0)
then several times
3. seeked to corresponding offset (0,0x10000,0x20000,...):
CALL lseek(0x13,0,0,0,0)
CALL lseek(0x13,0,0x10000,0,0)
...
4. written by 64k chunks of data (not zeroes), except last write which was
smaller of course:
CALL write(0x13,0x8229045,0x10000)
CALL write(0x13,0x8229045,0x10000)
...
5. Then closed
write() was always successful:
RET write 65536/0x10000
Corruption is another type this time on all checked files - only first 32k
are filled with data, the rest of file is zeroed.
In addition it was stat()-ed several times and chmod() was tried on it,
but unsuccessfully, because FAT32 does not support it.
Not posting full kdump output here for brevity, but if someone wants
to check me, I'll E-mail him corresponding parts of it.
df output:
...
/dev/ad2s1 39108736 7708608 31400128 20% /share
What can I do to help you to resolve this issue?
Thank you for your attention.
I've heard dmesg output is necessary. Not sure if it can help here, but
just in case:
---------------------------------------------------------------------------
Copyright (c) 1992-2002 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.7-RELEASE #3: Thu Jan 9 12:23:15 EET 2003
stas@localhost:/usr/src/sys/compile/kernel
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (434.32-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x665 Stepping = 5
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory = 133103616 (129984K bytes)
config> di pcic0
No such device: pcic0
Invalid command or syntax. Type `?' for help.
config> di sn0
No such device: sn0
Invalid command or syntax. Type `?' for help.
config> di lnc0
No such device: lnc0
Invalid command or syntax. Type `?' for help.
config> di ie0
No such device: ie0
Invalid command or syntax. Type `?' for help.
config> di fe0
No such device: fe0
Invalid command or syntax. Type `?' for help.
config> di ed0
No such device: ed0
Invalid command or syntax. Type `?' for help.
config> di cs0
No such device: cs0
Invalid command or syntax. Type `?' for help.
config> di bt0
No such device: bt0
Invalid command or syntax. Type `?' for help.
config> di aic0
No such device: aic0
Invalid command or syntax. Type `?' for help.
config> di aha0
No such device: aha0
Invalid command or syntax. Type `?' for help.
config> di adv0
No such device: adv0
Invalid command or syntax. Type `?' for help.
config> q
avail memory = 126320640 (123360K bytes)
Preloaded elf kernel "kernel" at 0xc0326000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc032609c.
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82810 (i810 GMCH) Host To Hub bridge> on motherboard
pci0: <PCI bus> on pcib0
pci0: <Intel 82810 (i810 GMCH) SVGA controller> at 1.0 irq 7
pcib1: <Intel 82801AA (ICH) Hub to PCI bridge> at device 30.0 on pci0
pci1: <PCI bus> on pcib1
dc0: <Macronix 98715/98715A 10/100BaseTX> port 0xc000-0xc0ff mem 0xdd000000-0xdd0000ff irq 7 at device 0.0 on pci1
dc0: Ethernet address: 00:80:ad:7e:2e:a4
miibus0: <MII bus> on dc0
dcphy0: <Intel 21143 NWAY media interface> on miibus0
dcphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: <RealTek 8139 10/100BaseTX> port 0xc400-0xc4ff mem 0xdd001000-0xdd0010ff irq 5 at device 2.0 on pci1
rl0: Ethernet address: 00:50:ba:83:6d:54
miibus1: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus1
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
isab0: <Intel 82801AA (ICH) PCI to LPC bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH ATA66 controller> port 0xf000-0xf00f at device 31.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <Intel 82801AA (ICH) USB controller> at 31.2 irq 12
pcm0: <Intel 82801AA (ICH)> port 0xdc00-0xdc3f,0xd800-0xd8ff irq 11 at device 31.5 on pci0
orm0: <Option ROM> at iomem 0xc0000-0xc7fff on isa0
fdc0: ready for input in output
fdc0: cmd 3 failed at out byte 1 of 3
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
DUMMYNET initialized (011031)
IP packet filtering initialized, divert enabled, rule-based forwarding enabled, default to accept, logging limited to 100 packets/entry by default
ad0: 2060MB <SAMSUNG WU32163A (2.16GB)> [4186/16/63] at ata0-master UDMA33
ad2: 38204MB <SAMSUNG SV4012H> [77622/16/63] at ata1-master UDMA66
Mounting root from ufs:/dev/ad0s1a
WARNING: / was not properly dismounted
---------------------------------------------------------------------------
--
Stas Kysel, UNIX Systems Administrator
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