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stapprobes.scsi
Langue: en
Version: 2009-01-21 (CentOS - 06/07/09)
Section: 5 (Format de fichier)
Sommaire
NAME
stapprobes.scsi - systemtap scsi probe pointsDESCRIPTION
This family of probe points is used to probe the SCSI activities. It contains the following probe points:
- scsi.ioentry
- Fires when SCSI mid layer prepares a SCSI request
Arguments:
disk_major
The major number of the diskdisk_minor
The minor number of the diskdevice_state
The current state of the device. The possible values could be:
SDEV_CREATED = 1, /* device created but not added to sysfs
* Only internal commands allowed (for inq) */
SDEV_RUNNING = 2, /* device properly configured
* All commands allowed */
SDEV_CANCEL = 3, /* beginning to delete device
* Only error handler commands allowed */
SDEV_DEL = 4, /* device deleted
* no commands allowed */
SDEV_QUIESCE = 5, /* Device quiescent. No block commands
* will be accepted, only specials (which
* originate in the mid-layer) */
SDEV_OFFLINE = 6, /* Device offlined (by error handling or
* user request */
SDEV_BLOCK = 7, /* Device blocked by scsi lld. No scsi
* commands from user or midlayer should be issued
* to the scsi lld. */
- scsi.iodispatching
- Fires when the SCSI mid layer dispatches a SCSI command to the low level driver
Arguments:
host_no
The host numberchannel
The channel numberlun
The lun numberdev_id
The scsi device iddevice_state
The current state of the device.data_direction
The data_direction specifies whether this command is from/to the device.
The possible values could be:
DMA_BIDIRECTIONAL = 0,
DMA_TO_DEVICE = 1,
DMA_FROM_DEVICE = 2,
DMA_NONE = 3,request_buffer
The request buffer addressreq_bufflen
The request buffer length
- scsi.iodone
- Fires when a SCSI command is done by low level driver and enqueued into the done queue.
Arguments:
host_no
The host numberchannel
The channel numberlun
The lun numberdev_id
The scsi device iddevice_state
The current state of the devicedata_direction
The data_direction specifies whether this command is from/to the device.
- scsi.iocompleted
- Fires when SCSI mid layer runs the completion processing for block device I/O requests
Arguments:
host_no
The host numberchannel
The channel numberlun
The lun numberdev_id
The scsi device iddevice_state
The current state of the devicedata_direction
The data_direction specifies whether this command is from/to the device.goodbytes
The bytes completed.
SEE ALSO
stap(1), stapprobes(5),Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre