sysfs scsi
sysfs 的观察 scsi 的内容
➜ ~ tree /sys/bus/scsi
/sys/bus/scsi
├── devices
│ ├── 0:0:0:0 -> ../../../devices/pci0000:00/0000:00:0c.0/host0/target0:0:0/0:0:0:0
│ ├── 0:0:1:0 -> ../../../devices/pci0000:00/0000:00:0c.0/host0/target0:0:1/0:0:1:0
│ ├── 1:0:0:0 -> ../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:0/1:0:0:0
│ ├── 1:0:2:3 -> ../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:2/1:0:2:3
│ ├── 2:0:0:0 -> ../../../devices/pseudo_0/adapter0/host2/target2:0:0/2:0:0:0
│ ├── 3:0:0:0 -> ../../../devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:0/3:0:0:0
│ ├── 3:0:1:0 -> ../../../devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:1/3:0:1:0
│ ├── host0 -> ../../../devices/pci0000:00/0000:00:0c.0/host0
│ ├── host1 -> ../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1
│ ├── host2 -> ../../../devices/pseudo_0/adapter0/host2
│ ├── host3 -> ../../../devices/pci0000:00/0000:00:01.1/ata1/host3
│ ├── host4 -> ../../../devices/pci0000:00/0000:00:01.1/ata2/host4
│ ├── target0:0:0 -> ../../../devices/pci0000:00/0000:00:0c.0/host0/target0:0:0
│ ├── target0:0:1 -> ../../../devices/pci0000:00/0000:00:0c.0/host0/target0:0:1
│ ├── target1:0:0 -> ../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:0
│ ├── target1:0:2 -> ../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:2
│ ├── target2:0:0 -> ../../../devices/pseudo_0/adapter0/host2/target2:0:0
│ ├── target3:0:0 -> ../../../devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:0
│ └── target3:0:1 -> ../../../devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:1
├── drivers
│ ├── sd
│ │ ├── 0:0:0:0 -> ../../../../devices/pci0000:00/0000:00:0c.0/host0/target0:0:0/0:0:0:0
│ │ ├── 0:0:1:0 -> ../../../../devices/pci0000:00/0000:00:0c.0/host0/target0:0:1/0:0:1:0
│ │ ├── 1:0:0:0 -> ../../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:0/1:0:0:0
│ │ ├── 1:0:2:3 -> ../../../../devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:2/1:0:2:3
│ │ ├── 2:0:0:0 -> ../../../../devices/pseudo_0/adapter0/host2/target2:0:0/2:0:0:0
│ │ ├── 3:0:0:0 -> ../../../../devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:0/3:0:0:0
│ │ ├── 3:0:1:0 -> ../../../../devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:1/3:0:1:0
│ │ ├── bind
│ │ ├── uevent
│ │ └── unbind
│ └── sr
│ ├── bind
│ ├── uevent
│ └── unbind
├── drivers_autoprobe
├── drivers_probe
└── uevent
[root@localhost scsi]# tree
.
├── devices
│ ├── 0:0:0:0 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata1/host0/target0:0:0/0:0:0:0
│ ├── 24:0:0:0 -> ../../../devices/pci0000:10/0000:10:07.1/0000:13:00.3/usb3/3-2/3-2.2/3-2.2.3/3-2.2.3:1.0/host24/target24:0:0/24:0:0:0
│ ├── 49:0:0:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:1/end_device-49:1/target49:0:0/49:0:0:0
│ ├── 49:0:1:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:2/end_device-49:2/target49:0:1/49:0:1:0
│ ├── 49:0:2:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:3/end_device-49:3/target49:0:2/49:0:2:0
│ ├── 49:0:3:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:4/end_device-49:4/target49:0:3/49:0:3:0
│ ├── 49:0:4:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:5/end_device-49:5/target49:0:4/49:0:4:0
│ ├── 49:2:0:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/target49:2:0/49:2:0:0
│ ├── host0 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata1/host0
│ ├── host1 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata2/host1
│ ├── host10 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata11/host10
│ ├── host11 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata12/host11
│ ├── host12 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata13/host12
│ ├── host13 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata14/host13
│ ├── host14 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata15/host14
│ ├── host15 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata16/host15
│ ├── host16 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata17/host16
│ ├── host17 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata18/host17
│ ├── host18 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata19/host18
│ ├── host19 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata20/host19
│ ├── host2 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata3/host2
│ ├── host20 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata21/host20
│ ├── host21 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata22/host21
│ ├── host22 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata23/host22
│ ├── host23 -> ../../../devices/pci0000:00/0000:00:01.7/0000:05:00.0/ata24/host23
│ ├── host24 -> ../../../devices/pci0000:10/0000:10:07.1/0000:13:00.3/usb3/3-2/3-2.2/3-2.2.3/3-2.2.3:1.0/host24
│ ├── host25 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata25/host25
│ ├── host26 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata26/host26
│ ├── host27 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata27/host27
│ ├── host28 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata28/host28
│ ├── host29 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata29/host29
│ ├── host3 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata4/host3
│ ├── host30 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata30/host30
│ ├── host31 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata31/host31
│ ├── host32 -> ../../../devices/pci0000:10/0000:10:08.1/0000:14:00.2/ata32/host32
│ ├── host33 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata33/host33
│ ├── host34 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata34/host34
│ ├── host35 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata35/host35
│ ├── host36 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata36/host36
│ ├── host37 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata37/host37
│ ├── host38 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata38/host38
│ ├── host39 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata39/host39
│ ├── host4 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata5/host4
│ ├── host40 -> ../../../devices/pci0000:40/0000:40:08.1/0000:42:00.2/ata40/host40
│ ├── host41 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata41/host41
│ ├── host42 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata42/host42
│ ├── host43 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata43/host43
│ ├── host44 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata44/host44
│ ├── host45 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata45/host45
│ ├── host46 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata46/host46
│ ├── host47 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata47/host47
│ ├── host48 -> ../../../devices/pci0000:50/0000:50:08.1/0000:52:00.2/ata48/host48
│ ├── host49 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49
│ ├── host5 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata6/host5
│ ├── host6 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata7/host6
│ ├── host7 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata8/host7
│ ├── host8 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata9/host8
│ ├── host9 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata10/host9
│ ├── target0:0:0 -> ../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata1/host0/target0:0:0
│ ├── target24:0:0 -> ../../../devices/pci0000:10/0000:10:07.1/0000:13:00.3/usb3/3-2/3-2.2/3-2.2.3/3-2.2.3:1.0/host24/target24:0:0
│ ├── target49:0:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:1/end_device-49:1/target49:0:0
│ ├── target49:0:1 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:2/end_device-49:2/target49:0:1
│ ├── target49:0:2 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:3/end_device-49:3/target49:0:2
│ ├── target49:0:3 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:4/end_device-49:4/target49:0:3
│ ├── target49:0:4 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:5/end_device-49:5/target49:0:4
│ └── target49:2:0 -> ../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/target49:2:0
├── drivers
│ ├── sd
│ │ ├── 0:0:0:0 -> ../../../../devices/pci0000:00/0000:00:01.6/0000:04:00.0/ata1/host0/target0:0:0/0:0:0:0
│ │ ├── 49:0:0:0 -> ../../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:1/end_device-49:1/target49:0:0/49:0:0:0
│ │ ├── 49:0:1:0 -> ../../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:2/end_device-49:2/target49:0:1/49:0:1:0
│ │ ├── 49:0:2:0 -> ../../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:3/end_device-49:3/target49:0:2/49:0:2:0
│ │ ├── 49:0:3:0 -> ../../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:4/end_device-49:4/target49:0:3/49:0:3:0
│ │ ├── bind
│ │ ├── module -> ../../../../module/sd_mod
│ │ ├── uevent
│ │ └── unbind
│ ├── ses
│ │ ├── 49:0:4:0 -> ../../../../devices/pci0000:20/0000:20:03.2/0000:22:00.0/host49/scsi_host/host49/port-49:5/end_device-49:5/target49:0:4/49:0:4:0
│ │ ├── bind
│ │ ├── module -> ../../../../module/ses
│ │ ├── uevent
│ │ └── unbind
│ └── sr
│ ├── 24:0:0:0 -> ../../../../devices/pci0000:10/0000:10:07.1/0000:13:00.3/usb3/3-2/3-2.2/3-2.2.3/3-2.2.3:1.0/host24/target24:0:0/24:0:0:0
│ ├── bind
│ ├── module -> ../../../../module/sr_mod
│ ├── uevent
│ └── unbind
├── drivers_autoprobe
├── drivers_probe
└── uevent
cat /proc/scsi/scsi
- QEMU
Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: QEMU Model: QEMU DVD-ROM Rev: 2.5+ Type: CD-ROM ANSI SCSI revision: 05 -
小米笔记本
- amd
[root@localhost ~]# cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: INTEL SSDSC2KB24 Rev: 0132 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi49 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: HGST HUH721212AL Rev: T6B0 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi49 Channel: 00 Id: 01 Lun: 00 Vendor: ATA Model: HGST HUH721212AL Rev: T6B0 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi49 Channel: 00 Id: 02 Lun: 00 Vendor: ATA Model: HGST HUH721212AL Rev: T6B0 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi49 Channel: 00 Id: 03 Lun: 00 Vendor: ATA Model: HGST HUH721212AL Rev: T6B0 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi49 Channel: 00 Id: 04 Lun: 00 Vendor: INSPUR Model: Smart Adapter Rev: 3.53 Type: Enclosure ANSI SCSI revision: 05 Host: scsi49 Channel: 02 Id: 00 Lun: 00 Vendor: INSPUR Model: 8222-SHBA Rev: 3.53 Type: RAID ANSI SCSI revision: 05 Host: scsi24 Channel: 00 Id: 00 Lun: 00 Vendor: Byosoft Model: Virtual CDROM Rev: 0502 Type: CD-ROM ANSI SCSI revision: 02 - 13900k
Attached devices:
Host: scsi6 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: ZHITAI SC001 Act Rev: 6200
Type: Direct-Access ANSI SCSI revision: 05 # 固态盘
Host: scsi7 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: WDC WD20EZBX-00A Rev: 1A01
Type: Direct-Access ANSI SCSI revision: 05 # 机械盘
Host: scsi8 Channel: 00 Id: 00 Lun: 00 # usb
Vendor: VendorCo Model: ProductCode Rev: 2.00
Type: Direct-Access ANSI SCSI revision: 04
lsscsi
- QEMU
[nix-shell:/sys/bus/scsi]$ lsscsi
[0:0:0:0] cd/dvd QEMU QEMU DVD-ROM 2.5+ /dev/sr0
- mi
[N:0:0:1] disk ZHITAI TiPlus5000 512GB__1 /dev/nvme0n1
[N:1:2:1] disk SAMSUNG MZVLW256HEHP-00000__1 /dev/nvme1n1
- surplus
[root@localhost ~]# lsscsi
[0:0:0:0] disk ATA INTEL SSDSC2KB24 0132 /dev/sda
[24:0:0:0] cd/dvd Byosoft Virtual CDROM 0502 /dev/sr0
[49:0:0:0] disk ATA HGST HUH721212AL T6B0 /dev/sdb
[49:0:1:0] disk ATA HGST HUH721212AL T6B0 /dev/sdc
[49:0:2:0] disk ATA HGST HUH721212AL T6B0 /dev/sdd
[49:0:3:0] disk ATA HGST HUH721212AL T6B0 /dev/sde
[49:0:4:0] enclosu INSPUR Smart Adapter 3.53 -
[49:2:0:0] storage INSPUR 8222-SHBA 3.53 -
[N:0:0:1] disk INTEL SSDPE2KE016T8__1 /dev/nvme0n1
[N:1:0:1] disk INTEL SSDPE2KE016T8__1 /dev/nvme1n1
- 13900k
🧀 lsscsi
[6:0:0:0] disk ATA ZHITAI SC001 Act 6200 /dev/sdb
[7:0:0:0] disk ATA WDC WD20EZBX-00A 1A01 /dev/sda
[8:0:0:0] disk VendorCo ProductCode 2.00 /dev/sdc # 这是个 360 U 盘
[N:0:0:1] disk ZHITAI TiPlus7100 1TB__1 /dev/nvme0n1
[N:1:0:1] disk ZHITAI TiPro7000 1TB__1 /dev/nvme1n1
[N:2:0:1] disk Fanxiang S790 4TB__1 /dev/nvme2n1
scsi 盘的状态控制
/sys/block/sdc/device/state
- 如果 open 之后，然后将 state 设置为 offline ，那么最后可以将
- 先 offline 掉，然后拔掉盘，会出现如下日志，这个日志和 offline 没有关系，总是会出现。
[ 32.503229] sd 0:0:3:4: [sdc] Synchronizing SCSI cache [ 32.503667] sd 0:0:3:4: [sdc] Synchronize Cache(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
可见，offline 之后，对于热拔是没有影响的
scsi 额外提供了一个 timeout 接口，但是是一样的
/*
* TODO: can we make these symlinks to the block layer ones?
*/
static ssize_t
sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
{
struct scsi_device *sdev;
sdev = to_scsi_device(dev);
return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
}
static ssize_t
sdev_store_timeout (struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct scsi_device *sdev;
int timeout;
sdev = to_scsi_device(dev);
sscanf (buf, "%d\n", &timeout);
blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
return count;
}
static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
靠，这个就是展示的是 block layer 的 timeout 机制。
static ssize_t queue_io_timeout_show(struct request_queue *q, char *page)
{
return sprintf(page, "%u\n", jiffies_to_msecs(q->rq_timeout));
}
/sys/devices/pci0000:00/0000:00:1a.0/0000:03:00.0/nvme/nvme0/nvme0n1/queue/io_timeout
nvme 是后来设计，所以直接复用 block layer 的 timeout 机制就可以了
➜ ~ find /sys -name "wwid"
/sys/devices/pseudo_0/adapter0/host2/target2:0:0/2:0:0:0/wwid
/sys/devices/pci0000:00/0000:00:08.0/nvme/nvme0/nvme0n1/wwid
/sys/devices/pci0000:00/0000:00:04.0/0000:01:01.0/nvme/nvme1/nvme1n1/wwid
/sys/devices/pci0000:00/0000:00:0c.0/host0/target0:0:0/0:0:0:0/wwid
/sys/devices/pci0000:00/0000:00:0c.0/host0/target0:0:1/0:0:1:0/wwid
/sys/devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:1/3:0:1:0/wwid
/sys/devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:0/3:0:0:0/wwid
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:0/1:0:0:0/wwid
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:1/1:0:1:0/wwid
➜ ~ find /sys -name "timeout"
/sys/devices/pseudo_0/adapter0/host2/target2:0:0/2:0:0:0/timeout
/sys/devices/pci0000:00/0000:00:0c.0/host0/target0:0:0/0:0:0:0/timeout
/sys/devices/pci0000:00/0000:00:0c.0/host0/target0:0:1/0:0:1:0/timeout
/sys/devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:1/3:0:1:0/timeout
/sys/devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:0/3:0:0:0/timeout
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:0/1:0:0:0/timeout
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:1/1:0:1:0/timeout
/sys/module/ipmi_watchdog/parameters/timeout
➜ ~ find /sys -name io_timeout
/sys/devices/pseudo_0/adapter0/host2/target2:0:0/2:0:0:0/block/sde/queue/io_timeout
/sys/devices/pci0000:00/0000:00:08.0/nvme/nvme0/nvme0n1/queue/io_timeout
/sys/devices/pci0000:00/0000:00:04.0/0000:01:01.0/nvme/nvme1/nvme1n1/queue/io_timeout
/sys/devices/pci0000:00/0000:00:0c.0/host0/target0:0:0/0:0:0:0/block/sdc/queue/io_timeout
/sys/devices/pci0000:00/0000:00:0c.0/host0/target0:0:1/0:0:1:0/block/sda/queue/io_timeout
/sys/devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:1/3:0:1:0/block/sdg/queue/io_timeout
/sys/devices/pci0000:00/0000:00:01.1/ata1/host3/target3:0:0/3:0:0:0/block/sdf/queue/io_timeout
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:2/1:0:2:3/block/sdd/queue/io_timeout
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host1/target1:0:0/1:0:0:0/block/sdb/queue/io_timeout
/sys/module/nvme_core/parameters/io_timeout
scsi 提供了每一个盘统计信息
scsi_timeout 中会增加 sysfs 中 iotmo_cnt ，其描述了总共出现 timeout 的数量:
show_sdev_iostat(iorequest_cnt);
show_sdev_iostat(iodone_cnt);
show_sdev_iostat(ioerr_cnt);
show_sdev_iostat(iotmo_cnt);
可以分析下 scsi_host 下内容
这是设备的
/sys/devices/pci0000:00/0000:00:01.6/0000:04:00.0/host0/scsi_host/host0/eh_deadline
/proc/scsi
/proc/scsi/scsi
🧀 cat
Attached devices:
Host: scsi6 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: ZHITAI SC001 Act Rev: 6200
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi7 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: WDC WD20EZBX-00A Rev: 1A01
Type: Direct-Access ANSI SCSI revision: 05
- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/s2-proc-dir-scsi
[ ] /proc/scsi/sg
[ ] /proc/scsi/device_info
莫明其妙的鸡儿玩意儿。
🧀 cat /proc/scsi/device_info
'Aashima' 'IMAGERY 2400SP' 0x1
'CHINON' 'CD-ROM CDS-431' 0x1
'CHINON' 'CD-ROM CDS-535' 0x1
'DENON' 'DRD-25X' 0x1
'HITACHI' 'DK312C' 0x1
'HITACHI' 'DK314C' 0x1
'IBM' '2104-DU3' 0x1
'IBM' '2104-TU3' 0x1
'IMS' 'CDD521/10' 0x1
'MAXTOR' 'XT-3280' 0x1
'MAXTOR' 'XT-4380S' 0x1
'MAXTOR' 'MXT-1240S' 0x1
'MAXTOR' 'XT-4170S' 0x1
'MAXTOR' 'XT-8760S' 0x1
'MEDIAVIS' 'RENO CD-ROMX2A' 0x1
'MICROTEK' 'ScanMakerIII' 0x1
'NEC' 'CD-ROM DRIVE:841' 0x1
'PHILIPS' 'PCA80SC' 0x1
'RODIME' 'RO3000S' 0x1
'SUN' 'SENA' 0x1
'SANYO' 'CRD-250S' 0x1
'SEAGATE' 'ST157N' 0x1
'SEAGATE' 'ST296' 0x1
'SEAGATE' 'ST1581' 0x1
'SONY' 'CD-ROM CDU-541' 0x1
'SONY' 'CD-ROM CDU-55S' 0x1
'SONY' 'CD-ROM CDU-561' 0x1
'SONY' 'CD-ROM CDU-8012' 0x1
'SONY' 'SDT-5000' 0x200000
'TANDBERG' 'TDC 3600' 0x1
'TEAC' 'CD-R55S' 0x1
'TEAC' 'CD-ROM' 0x1
'TEAC' 'MT-2ST/45S2-27' 0x1
'HP' 'C1750A' 0x1
'HP' 'C1790A' 0x1
'HP' 'C2500A' 0x1
'MEDIAVIS' 'CDR-H93MV' 0x1
'MICROTEK' 'ScanMaker II' 0x1
'MITSUMI' 'CD-R CR-2201CS' 0x1
'NEC' 'D3856' 0x1
'QUANTUM' 'LPS525S' 0x1
'QUANTUM' 'PD1225S' 0x1
'QUANTUM' 'FIREBALL ST4.3S' 0x1
'RELISYS' 'Scorpio' 0x1
'SANKYO' 'CP525' 0x1
'TEXEL' 'CD-ROM' 0x5
'transtec' 'T5008' 0x40000
'YAMAHA' 'CDR100' 0x1
'YAMAHA' 'CDR102' 0x1
'YAMAHA' 'CRW8424S' 0x1
'YAMAHA' 'CRW6416S' 0x1
'' 'Scanner' 0x1
'3PARdata' 'VV' 0x20000
'ADAPTEC' 'AACRAID' 0x2
'ADAPTEC' 'Adaptec 5400S' 0x2
'AIX' 'VDASD' 0x10002000
'AFT PRO' '-IX CF' 0x2
'BELKIN' 'USB 2 HS-CF' 0x402
'BROWNIE' '1200U3P' 0x40000
'BROWNIE' '1600U3P' 0x40000
'CANON' 'IPUBJD' 0x40
'CBOX3' 'USB Storage-SMC' 0x402
'CMD' 'CRA-7280' 0x40
'CNSI' 'G7324' 0x40
'CNSi' 'G8324' 0x40
'COMPAQ' 'ARRAY CONTROLLER' 0x820240
'COMPAQ' 'LOGICAL VOLUME' 0x800002
'COMPAQ' 'CR3500' 0x2
'COMPAQ' 'MSA1000' 0x1040
'COMPAQ' 'MSA1000 VOLUME' 0x1040
'COMPAQ' 'HSV110' 0x21000
'DDN' 'SAN DataDirector' 0x40
'DEC' 'HSG80' 0x21000
'DELL' 'PV660F' 0x40
'DELL' 'PV660F PSEUDO' 0x40
'DELL' 'PSEUDO DEVICE .' 0x40
'DELL' 'PV530F' 0x40
'DELL' 'PERCRAID' 0x2
'DGC' 'RAID' 0x40
'DGC' 'DISK' 0x40
'EMC' 'Invista' 0x240
'EMC' 'SYMMETRIX' 0x100020240
'EMULEX' 'MD21/S2 ESDI' 0x10
'easyRAID' '16P' 0x40000
'easyRAID' 'X6P' 0x40000
'easyRAID' 'F8' 0x40000
'FSC' 'CentricStor' 0x240
'FUJITSU' 'ETERNUS_DXM' 0x200000000
'Generic' 'USB SD Reader' 0x402
'Generic' 'USB Storage-SMC' 0x402
'Generic' 'Ultra HS-SD/MMC' 0xc00
'HITACHI' 'DF400' 0x20000
'HITACHI' 'DF500' 0x20000
'HITACHI' 'DISK-SUBSYSTEM' 0x20000
'HITACHI' 'HUS1530' 0x2000000
'HITACHI' 'OPEN-' 0x10020000
'HP' 'A6189A' 0x240
'HP' 'OPEN-' 0x10020000
'HP' 'NetRAID-4M' 0x2
'HP' 'HSV100' 0x21000
'HP' 'C1557A' 0x2
'HP' 'C3323-300' 0x20
'HP' 'C5713A' 0x40000
'HP' 'DISK-SUBSYSTEM' 0x20000
'HPE' 'OPEN-' 0x10020000
'IBM' 'AuSaV1S2' 0x2
'IBM' 'ProFibre 4000R' 0x240
'IBM' '2076' 0x2000
'IBM' '2105' 0x400000
'iomega' 'jaz 1GB' 0x21
'IOMEGA' 'ZIP' 0x21
'IOMEGA' 'Io20S *F' 0x8
'INSITE' 'Floptical F*8I' 0x8
'INSITE' 'I325VM' 0x8
'Intel' 'Multi-Flex' 0x20000000
'iRiver' 'iFP Mass Driver' 0x80400
'LASOUND' 'CDX7405' 0x90
'Marvell' 'Console' 0x4000000
'Marvell' '91xx Config' 0x4000000
'MATSHITA' 'PD-1' 0x12
'MATSHITA' 'DMC-LC5' 0x80400
'MATSHITA' 'DMC-LC40' 0x80400
'Medion' 'Flash XL MMC/SD' 0x2
'MegaRAID' 'LD' 0x2
'MICROP' '4110' 0x20
'MSFT' 'Virtual HD' 0x60000000
'MYLEX' 'DACARMRB' 0x20000
'nCipher' 'Fastness Crypto' 0x2
'NAKAMICH' 'MJ-4.8S' 0x12
'NAKAMICH' 'MJ-5.16S' 0x12
'NEC' 'PD-1 ODX654P' 0x12
'NEC' 'iStorage' 0x20000
'NRC' 'MBR-7' 0x12
'NRC' 'MBR-7.4' 0x12
'PIONEER' 'CD-ROM DRM-600' 0x12
'PIONEER' 'CD-ROM DRM-602X' 0x12
'PIONEER' 'CD-ROM DRM-604X' 0x12
'PIONEER' 'CD-ROM DRM-624X' 0x12
'Promise' 'VTrak E610f' 0x20000040
'Promise' '' 0x40
'QEMU' 'QEMU CD-ROM' 0x4000000
'QNAP' 'iSCSI Storage' 0x40000000
'SYNOLOGY' 'iSCSI Storage' 0x40000000
'QUANTUM' 'XP34301' 0x20
'REGAL' 'CDC-4X' 0x90
'SanDisk' 'ImageMate CF-SD1' 0x2
'SEAGATE' 'ST34555N' 0x20
'SEAGATE' 'ST3390N' 0x20
'SEAGATE' 'ST900MM0006' 0x4000000
'SGI' 'RAID3' 0x40
'SGI' 'RAID5' 0x40
'SGI' 'TP9100' 0x20000
'SGI' 'Universal Xport' 0x100000
'SKhynix' 'H28U74301AMR' 0x4000000
'IBM' 'Universal Xport' 0x100000
'SUN' 'Universal Xport' 0x100000
'DELL' 'Universal Xport' 0x100000
'STK' 'Universal Xport' 0x100000
'NETAPP' 'Universal Xport' 0x100000
'LSI' 'Universal Xport' 0x100000
'ENGENIO' 'Universal Xport' 0x100000
'LENOVO' 'Universal Xport' 0x100000
'FUJITSU' 'Universal Xport' 0x100000
'SanDisk' 'Cruzer Blade' 0x10000400
'SMSC' 'USB 2 HS-CF' 0x440
'SONY' 'CD-ROM CDU-8001' 0x4
'SONY' 'TSL' 0x2
'ST650211' 'CF' 0x400000
'SUN' 'T300' 0x40
'SUN' 'T4' 0x40
'Tornado-' 'F4' 0x40000
'TOSHIBA' 'CDROM' 0x100
'TOSHIBA' 'CD-ROM' 0x100
'Traxdata' 'CDR4120' 0x1
'USB2.0' 'SMARTMEDIA/XD' 0x402
'WangDAT' 'Model 2600' 0x200000
'WangDAT' 'Model 3200' 0x200000
'WangDAT' 'Model 1300' 0x200000
'WDC WD25' '00JB-00FUA0' 0x40000
'XYRATEX' 'RS' 0x240
'Zzyzx' 'RocketStor 500S' 0x40
'Zzyzx' 'RocketStor 2000' 0x40
/sys/devices/pci0000:00/0000:00:0a.0/virtio5/host0/scsi_host/host0/
drivers/scsi/scsi_sysfs.c 中 scsi_sysfs_shost_attrs
源码
scsi_sysfs.c
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