centos man page for scsi_device_quiesce

Query: scsi_device_quiesce

OS: centos

Section: 9

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SCSI_DEVICE_QUIESCE(9)						  SCSI mid layer					    SCSI_DEVICE_QUIESCE(9)

NAME
scsi_device_quiesce - Block user issued commands.
SYNOPSIS
int scsi_device_quiesce(struct scsi_device * sdev);
ARGUMENTS
sdev scsi device to quiesce.
DESCRIPTION
This works by trying to transition to the SDEV_QUIESCE state (which must be a legal transition). When the device is in this state, only special requests will be accepted, all others will be deferred. Since special requests may also be requeued requests, a successful return doesn't guarantee the device will be totally quiescent. Must be called with user context, may sleep. Returns zero if unsuccessful or an error if not.
AUTHORS
James Bottomley <James.Bottomley@hansenpartnership.com> Author. Rob Landley <rob@landley.net> Author.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SCSI_DEVICE_QUIESCE(9)