On Wed, Jul 12, 2017 at 09:20:42AM +0200, Mateusz S wrote:
> [1.] One line summary of the problem:
> Calling lseek64 with SEEK_HOLE and negative offset on ext filesystems
> returns with EUCLEAN error.
Heh, yes, that is a problem. I /would/ say that the new iomap-based
SEEK_HOLE/SEEK_DATA implementation for ext4 will fix this problem,
but... the vfs common code doesn't check this and also fails. <sigh>
Ok, wrote test case and VFS fix, now going to lean on Ted to review
the ext4 SEEK_[HD] conversion patch while I send the vfs fix patch.
I imagine ext4_seek_hole and ext4_seek_data will need patching for
older kernels...
--D
> [2.] Full description of the problem/report:
> Calling lseek64 with SEEK_HOLE and negative offset, on truncated file,
> on ext filesystems returns with EUCLEAN error.
> This seems to happen only on ext filesystems (ext2, ext3, ext4).
> I have tested with btrfs, ext2-4, f2fs, fat32, jfs, nilfs2, reiserfs,
> tmpfs, xfs and it only happens on ext.
> This does not happen for me on 4.4.75 kernel, but it happens on 4.9.35
> and newer.
> I tried reproducing it on:
> - Manjaro Linux machine with various kernels
> - Arch Linux with 4.11.9 kernel
> - Ubuntu 17.04 virtual machine on QEMU/KVM with 4.10.0-26 kernel
> - Ubuntu 16.04 machine
> and it reproduced on each of them (except from Manjaro with 4.4.75 kernel).
>
> [3.] Keywords (i.e., modules, networking, kernel):
> filesystem, fs, kernel
>
> [4.] Kernel version (from /proc/version):
> (output from Ubuntu 17.04 Virtual Machine)
> Linux version 4.10.0-26-generic (buildd@lcy01-09) (gcc version 6.3.0
> 20170406 (Ubuntu 6.3.0-12ubuntu2) ) #30-Ubuntu SMP Tue Jun 27 09:30:12
> UTC 2017
>
> [6.] A small shell script or example program which triggers the
> problem (if possible)
>
> C++ code:
> #include <errno.h>
> #include <fcntl.h>
> #include <string>
> #include <string.h>
> #include <stdio.h>
> #include <unistd.h>
> #include <sys/stat.h>
> #include <sys/types.h>
>
> using namespace std;
>
> int main(int argc, char** argv)
> {
> string targetdir = argv[1];
> creat((targetdir + "/file").c_str(), 0777);
> int file = open((targetdir + "/file").c_str(), O_RDWR);
>
> errno = 0;
> off64_t lseekres = lseek64(file, -1, SEEK_HOLE);
> printf("lseek(%i, -1, SEEK_HOLE) = %lli\terrno: %i (%s)\n", file,
> lseekres, errno, strerror(errno));
>
> return 0;
> }
>
> Run command:
> ./program /home/user/directory-on-ext-filesystem
>
> Output:
> lseek(4, -1, SEEK_HOLE) = -1 errno: 117 (Structure needs cleaning)
>
> [7.] Environment
> [7.1.] Software (add the output of the ver_linux script here)
> (output from Ubuntu VM)
>
> If some fields are empty or look unusual you may have an old version.
> Compare to the current minimal requirements in Documentation/Changes.
>
> DISTRIB_ID=Ubuntu
> DISTRIB_RELEASE=17.04
> DISTRIB_CODENAME=zesty
> DISTRIB_DESCRIPTION="Ubuntu 17.04"
> NAME="Ubuntu"
> VERSION="17.04 (Zesty Zapus)"
> ID=ubuntu
> ID_LIKE=debian
> PRETTY_NAME="Ubuntu 17.04"
> VERSION_ID="17.04"
> HOME_URL="https://www.ubuntu.com/";
> SUPPORT_URL="https://help.ubuntu.com/";
> BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/";
> PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy";
> VERSION_CODENAME=zesty
> UBUNTU_CODENAME=zesty
> Linux ubuntu 4.10.0-26-generic #30-Ubuntu SMP Tue Jun 27 09:30:12 UTC
> 2017 x86_64 x86_64 x86_64 GNU/Linux
>
> Gnu C gcc (Ubuntu 6.3.0-12ubuntu2) 6.3.0 20170406
> util-linux linux 2.29
> mount linux 2.29 (libmount 2.29.: selinux, btrfs,
> assert, debug)
> modutils 22
> e2fsprogs 1.43.4
> Linux C Library > libc.2.24
> Dynamic linker (ldd) 2.24
> Procps 3.3.12
> Net-tools 2.10-alpha
> iproute2 iproute2-ss161212
> Kbd 2.0.3
> Sh-utils 8.26
> Modules Loaded ebtable_filter ebtables ip6table_filter
> ip6_tables iptable_filter ppdev snd_hda_codec_generic snd_hda_intel
> snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds
> soundcore serio_raw i2c_piix4 parport_pc parport qemu_fw_cfg mac_hid
> ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp
> libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10
> raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
> raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul
> crc32_pclmul ghash_clmulni_intel pcbc 8139too aesni_intel aes_x86_64
> crypto_simd glue_helper cryptd psmouse qxl ttm drm_kms_helper
> syscopyarea sysfillrect floppy sysimgblt fb_sys_fops 8139cp mii
> pata_acpi drm
>
> free reports:
> total used free shared buff/cache available
> Mem: 2045740 92516 1464428 3272 488796 1796256
> Swap: 969960 0 969960
>
> [7.2.] Processor information (from /proc/cpuinfo):
> /proc/cpuinfo
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 6
> model : 94
> model name : Intel Core Processor (Skylake)
> stepping : 3
> microcode : 0x1
> cpu MHz : 3408.000
> cache size : 16384 KB
> physical id : 0
> siblings : 1
> core id : 0
> cpu cores : 1
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm
> constant_tsc rep_good nopl xtopology pni pclmulqdq ssse3 fma cx16 pcid
> sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx
> f16c rdrand hypervisor lahf_lm abm 3dnowprefetch fsgsbase bmi1 hle
> avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap xsaveopt xsavec
> xgetbv1 arat
> bugs :
> bogomips : 6816.00
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management:
>
> processor : 1
> vendor_id : GenuineIntel
> cpu family : 6
> model : 94
> model name : Intel Core Processor (Skylake)
> stepping : 3
> microcode : 0x1
> cpu MHz : 3408.000
> cache size : 16384 KB
> physical id : 1
> siblings : 1
> core id : 0
> cpu cores : 1
> apicid : 1
> initial apicid : 1
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm
> constant_tsc rep_good nopl xtopology pni pclmulqdq ssse3 fma cx16 pcid
> sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx
> f16c rdrand hypervisor lahf_lm abm 3dnowprefetch fsgsbase bmi1 hle
> avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap xsaveopt xsavec
> xgetbv1 arat
> bugs :
> bogomips : 6816.00
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management:
>
> [7.3.] Module information (from /proc/modules):
> ebtable_filter 16384 0 - Live 0x0000000000000000
> ebtables 36864 1 ebtable_filter, Live 0x0000000000000000
> ip6table_filter 16384 0 - Live 0x0000000000000000
> ip6_tables 28672 1 ip6table_filter, Live 0x0000000000000000
> iptable_filter 16384 0 - Live 0x0000000000000000
> ppdev 20480 0 - Live 0x0000000000000000
> snd_hda_codec_generic 73728 1 - Live 0x0000000000000000
> snd_hda_intel 36864 0 - Live 0x0000000000000000
> snd_hda_codec 126976 2 snd_hda_codec_generic,snd_hda_intel, Live
> 0x0000000000000000
> snd_hda_core 81920 3
> snd_hda_codec_generic,snd_hda_intel,snd_hda_codec, Live
> 0x0000000000000000
> snd_hwdep 16384 1 snd_hda_codec, Live 0x0000000000000000
> snd_pcm 102400 3 snd_hda_intel,snd_hda_codec,snd_hda_core, Live
> 0x0000000000000000
> snd_timer 32768 1 snd_pcm, Live 0x0000000000000000
> snd 77824 6 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer,
> Live 0x0000000000000000
> input_leds 16384 0 - Live 0x0000000000000000
> soundcore 16384 1 snd, Live 0x0000000000000000
> serio_raw 16384 0 - Live 0x0000000000000000
> i2c_piix4 24576 0 - Live 0x0000000000000000
> parport_pc 32768 0 - Live 0x0000000000000000
> parport 49152 2 ppdev,parport_pc, Live 0x0000000000000000
> qemu_fw_cfg 16384 0 - Live 0x0000000000000000
> mac_hid 16384 0 - Live 0x0000000000000000
> ib_iser 49152 0 - Live 0x0000000000000000
> rdma_cm 53248 1 ib_iser, Live 0x0000000000000000
> iw_cm 45056 1 rdma_cm, Live 0x0000000000000000
> ib_cm 49152 1 rdma_cm, Live 0x0000000000000000
> ib_core 196608 4 ib_iser,rdma_cm,iw_cm,ib_cm, Live 0x0000000000000000
> configfs 36864 2 rdma_cm, Live 0x0000000000000000
> iscsi_tcp 20480 0 - Live 0x0000000000000000
> libiscsi_tcp 20480 1 iscsi_tcp, Live 0x0000000000000000
> libiscsi 57344 3 ib_iser,iscsi_tcp,libiscsi_tcp, Live 0x0000000000000000
> scsi_transport_iscsi 98304 4 ib_iser,iscsi_tcp,libiscsi, Live 0x0000000000000000
> ip_tables 24576 1 iptable_filter, Live 0x0000000000000000
> x_tables 36864 5
> ebtables,ip6table_filter,ip6_tables,iptable_filter,ip_tables, Live
> 0x0000000000000000
> autofs4 40960 2 - Live 0x0000000000000000
> btrfs 1093632 0 - Live 0x0000000000000000
> raid10 49152 0 - Live 0x0000000000000000
> raid456 131072 0 - Live 0x0000000000000000
> async_raid6_recov 20480 1 raid456, Live 0x0000000000000000
> async_memcpy 16384 2 raid456,async_raid6_recov, Live 0x0000000000000000
> async_pq 16384 2 raid456,async_raid6_recov, Live 0x0000000000000000
> async_xor 16384 3 raid456,async_raid6_recov,async_pq, Live 0x0000000000000000
> async_tx 16384 5
> raid456,async_raid6_recov,async_memcpy,async_pq,async_xor, Live
> 0x0000000000000000
> xor 24576 2 btrfs,async_xor, Live 0x0000000000000000
> raid6_pq 114688 4 btrfs,raid456,async_raid6_recov,async_pq, Live
> 0x0000000000000000
> libcrc32c 16384 1 raid456, Live 0x0000000000000000
> raid1 40960 0 - Live 0x0000000000000000
> raid0 20480 0 - Live 0x0000000000000000
> multipath 16384 0 - Live 0x0000000000000000
> linear 16384 0 - Live 0x0000000000000000
> crct10dif_pclmul 16384 0 - Live 0x0000000000000000
> crc32_pclmul 16384 0 - Live 0x0000000000000000
> ghash_clmulni_intel 16384 0 - Live 0x0000000000000000
> pcbc 16384 0 - Live 0x0000000000000000
> 8139too 36864 0 - Live 0x0000000000000000
> aesni_intel 167936 0 - Live 0x0000000000000000
> aes_x86_64 20480 1 aesni_intel, Live 0x0000000000000000
> crypto_simd 16384 1 aesni_intel, Live 0x0000000000000000
> glue_helper 16384 1 aesni_intel, Live 0x0000000000000000
> cryptd 24576 3 ghash_clmulni_intel,aesni_intel,crypto_simd, Live
> 0x0000000000000000
> psmouse 139264 0 - Live 0x0000000000000000
> qxl 69632 1 - Live 0x0000000000000000
> ttm 98304 1 qxl, Live 0x0000000000000000
> drm_kms_helper 151552 1 qxl, Live 0x0000000000000000
> syscopyarea 16384 1 drm_kms_helper, Live 0x0000000000000000
> sysfillrect 16384 1 drm_kms_helper, Live 0x0000000000000000
> floppy 77824 0 - Live 0x0000000000000000
> sysimgblt 16384 1 drm_kms_helper, Live 0x0000000000000000
> fb_sys_fops 16384 1 drm_kms_helper, Live 0x0000000000000000
> 8139cp 28672 0 - Live 0x0000000000000000
> mii 16384 2 8139too,8139cp, Live 0x0000000000000000
> pata_acpi 16384 0 - Live 0x0000000000000000
> drm 352256 4 qxl,ttm,drm_kms_helper, Live 0x0000000000000000
>
> [7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
> 0000-0000 : PCI Bus 0000:00
> 0000-0000 : dma1
> 0000-0000 : pic1
> 0000-0000 : timer0
> 0000-0000 : timer1
> 0000-0000 : keyboard
> 0000-0000 : keyboard
> 0000-0000 : rtc0
> 0000-0000 : dma page reg
> 0000-0000 : pic2
> 0000-0000 : dma2
> 0000-0000 : fpu
> 0000-0000 : 0000:00:01.1
> 0000-0000 : ata_piix
> 0000-0000 : 0000:00:01.1
> 0000-0000 : ata_piix
> 0000-0000 : 0000:00:01.1
> 0000-0000 : ata_piix
> 0000-0000 : vesafb
> 0000-0000 : floppy
> 0000-0000 : floppy
> 0000-0000 : 0000:00:01.1
> 0000-0000 : ata_piix
> 0000-0000 : floppy
> 0000-0000 : serial
> 0000-0000 : QEMU0002:00
> 0000-0000 : fw_cfg_io
> 0000-0000 : 0000:00:01.3
> 0000-0000 : ACPI PM1a_EVT_BLK
> 0000-0000 : ACPI PM1a_CNT_BLK
> 0000-0000 : ACPI PM_TMR
> 0000-0000 : 0000:00:01.3
> 0000-0000 : piix4_smbus
> 0000-0000 : PCI conf1
> 0000-0000 : PCI Bus 0000:00
> 0000-0000 : ACPI GPE0_BLK
> 0000-0000 : 0000:00:03.0
> 0000-0000 : 8139cp
> 0000-0000 : 0000:00:06.0
> 0000-0000 : 0000:00:02.0
> 0000-0000 : 0000:00:05.0
> 0000-0000 : uhci_hcd
> 0000-0000 : 0000:00:05.1
> 0000-0000 : uhci_hcd
> 0000-0000 : 0000:00:05.2
> 0000-0000 : uhci_hcd
> 0000-0000 : 0000:00:07.0
> 0000-0000 : 0000:00:01.1
> 0000-0000 : ata_piix
>
> [7.5.] PCI information ('lspci -vvv' as root)
> 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
> Subsystem: Red Hat, Inc Qemu virtual machine
> Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>
> 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
> Subsystem: Red Hat, Inc Qemu virtual machine
> Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>
> 00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE
> [Natoma/Triton II] (prog-if 80 [Master])
> Subsystem: Red Hat, Inc Qemu virtual machine
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
> Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable)
> Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
> Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable)
> Region 4: I/O ports at c1e0 [size=16]
> Kernel driver in use: ata_piix
> Kernel modules: pata_acpi
>
> 00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
> Subsystem: Red Hat, Inc Qemu virtual machine
> Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Interrupt: pin A routed to IRQ 9
> Kernel driver in use: piix4_smbus
> Kernel modules: i2c_piix4
>
> 00:02.0 VGA compatible controller: Red Hat, Inc. QXL paravirtual
> graphic card (rev 04) (prog-if 00 [VGA controller])
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Interrupt: pin A routed to IRQ 11
> Region 0: Memory at f4000000 (32-bit, non-prefetchable) [size=64M]
> Region 1: Memory at f8000000 (32-bit, non-prefetchable) [size=64M]
> Region 2: Memory at fc054000 (32-bit, non-prefetchable) [size=8K]
> Region 3: I/O ports at c140 [size=32]
> Expansion ROM at 000c0000 [disabled] [size=128K]
> Kernel driver in use: qxl
> Kernel modules: qxl
>
> 00:03.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 20)
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Physical Slot: 3
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin A routed to IRQ 11
> Region 0: I/O ports at c000 [size=256]
> Region 1: Memory at fc056000 (32-bit, non-prefetchable) [size=256]
> Expansion ROM at fc000000 [disabled] [size=256K]
> Kernel driver in use: 8139cp
> Kernel modules: 8139cp, 8139too
>
> 00:04.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
> Family) High Definition Audio Controller (rev 01)
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Physical Slot: 4
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx+
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin A routed to IRQ 26
> Region 0: Memory at fc050000 (32-bit, non-prefetchable) [size=16K]
> Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
> Address: 00000000fee00000 Data: 4061
> Kernel driver in use: snd_hda_intel
> Kernel modules: snd_hda_intel
>
> 00:05.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB
> UHCI Controller #1 (rev 03) (prog-if 00 [UHCI])
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin A routed to IRQ 10
> Region 4: I/O ports at c160 [size=32]
> Kernel driver in use: uhci_hcd
>
> 00:05.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB
> UHCI Controller #2 (rev 03) (prog-if 00 [UHCI])
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin B routed to IRQ 11
> Region 4: I/O ports at c180 [size=32]
> Kernel driver in use: uhci_hcd
>
> 00:05.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB
> UHCI Controller #3 (rev 03) (prog-if 00 [UHCI])
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin C routed to IRQ 11
> Region 4: I/O ports at c1a0 [size=32]
> Kernel driver in use: uhci_hcd
>
> 00:05.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2
> EHCI Controller #1 (rev 03) (prog-if 20 [EHCI])
> Subsystem: Red Hat, Inc QEMU Virtual Machine
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin D routed to IRQ 10
> Region 0: Memory at fc057000 (32-bit, non-prefetchable) [size=4K]
> Kernel driver in use: ehci-pci
>
> 00:06.0 Communication controller: Red Hat, Inc Virtio console
> Subsystem: Red Hat, Inc Virtio console
> Physical Slot: 6
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx+
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin A routed to IRQ 11
> Region 0: I/O ports at c100 [size=64]
> Region 1: Memory at fc058000 (32-bit, non-prefetchable) [size=4K]
> Region 4: Memory at febf8000 (64-bit, prefetchable) [size=16K]
> Capabilities: [98] MSI-X: Enable+ Count=2 Masked-
> Vector table: BAR=1 offset=00000000
> PBA: BAR=1 offset=00000800
> Capabilities: [84] Vendor Specific Information: VirtIO: <unknown>
> BAR=0 offset=00000000 size=00000000
> Capabilities: [70] Vendor Specific Information: VirtIO: Notify
> BAR=4 offset=00003000 size=00001000 multiplier=00000004
> Capabilities: [60] Vendor Specific Information: VirtIO: DeviceCfg
> BAR=4 offset=00002000 size=00001000
> Capabilities: [50] Vendor Specific Information: VirtIO: ISR
> BAR=4 offset=00001000 size=00001000
> Capabilities: [40] Vendor Specific Information: VirtIO: CommonCfg
> BAR=4 offset=00000000 size=00001000
> Kernel driver in use: virtio-pci
>
> 00:07.0 Unclassified device [00ff]: Red Hat, Inc Virtio memory balloon
> Subsystem: Red Hat, Inc Virtio memory balloon
> Physical Slot: 7
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR+ FastB2B- DisINTx-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin A routed to IRQ 11
> Region 0: I/O ports at c1c0 [size=32]
> Region 4: Memory at febfc000 (64-bit, prefetchable) [size=16K]
> Capabilities: [84] Vendor Specific Information: VirtIO: <unknown>
> BAR=0 offset=00000000 size=00000000
> Capabilities: [70] Vendor Specific Information: VirtIO: Notify
> BAR=4 offset=00003000 size=00001000 multiplier=00000004
> Capabilities: [60] Vendor Specific Information: VirtIO: DeviceCfg
> BAR=4 offset=00002000 size=00001000
> Capabilities: [50] Vendor Specific Information: VirtIO: ISR
> BAR=4 offset=00001000 size=00001000
> Capabilities: [40] Vendor Specific Information: VirtIO: CommonCfg
> BAR=4 offset=00000000 size=00001000
> Kernel driver in use: virtio-pci
>
> [7.6.] SCSI information (from /proc/scsi/scsi)
> Attached devices:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
> Vendor: ATA Model: QEMU HARDDISK Rev: 2.5+
> Type: Direct-Access ANSI SCSI revision: 05
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
> Vendor: QEMU Model: QEMU DVD-ROM Rev: 2.5+
> Type: CD-ROM ANSI SCSI revision: 05
