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| author | Rob Evers <revers@redhat.com> | 2012-05-18 14:08:54 -0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-07-20 08:58:32 +0100 |
| commit | 3588c5a21aef8c8dcc3b30d72c62971e97af1322 (patch) | |
| tree | e988d106664bb37c8044165ce18319b65c249e38 /include/scsi/scsi.h | |
| parent | 6ad819b06ddf13a5a1d995eb26555903f6c3b71a (diff) | |
| download | lwn-3588c5a21aef8c8dcc3b30d72c62971e97af1322.tar.gz lwn-3588c5a21aef8c8dcc3b30d72c62971e97af1322.zip | |
[SCSI] scsi_dh_alua: implement 'implied transition timeout'
During alua transitions, an array can return transitioning
status in response to rtpg requests. These requests get
retried for a maximum of 60 seconds by default before timing
out. Sometimes this timeout isn't sufficient to allow the
array to complete the transition. T10-spc4 addresses this
under 'Report Target Port Groups' command.
This update retrieves the timeout value from the storage
array if available and retries the transitioning rtpgs
for up to the 'implied transitioning timeout' value
Signed-off-by: Rob Evers <revers@redhat.com>
Reviewed-by: Babu Moger <babu.moger@netapp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi/scsi.h')
| -rw-r--r-- | include/scsi/scsi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index f34a5a87af38..c6f0974b8916 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -161,6 +161,8 @@ struct scsi_cmnd; #define MI_REPORT_PRIORITY 0x0e #define MI_REPORT_TIMESTAMP 0x0f #define MI_MANAGEMENT_PROTOCOL_IN 0x10 +/* value for MI_REPORT_TARGET_PGS ext header */ +#define MI_EXT_HDR_PARAM_FMT 0x20 /* values for maintenance out */ #define MO_SET_IDENTIFYING_INFORMATION 0x06 #define MO_SET_TARGET_PGS 0x0a |