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| author | James Smart <James.Smart@Emulex.Com> | 2006-08-18 17:33:29 -0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-09-04 21:22:05 -0500 |
| commit | 0f29b966d60e9a4f5ecff9f3832257b38aea4f13 (patch) | |
| tree | 0b14cbcdf74aee4676c49353f816ae5f98c504ee /include/scsi | |
| parent | ae36764a230ff6a278ed93735acf5fcda08f2786 (diff) | |
| download | linux-0f29b966d60e9a4f5ecff9f3832257b38aea4f13.tar.bz2 | |
[SCSI] FC transport: Add dev_loss_tmo callbacks, and new fast_io_fail_tmo w/ callback
This patch adds the following functionality to the FC transport:
- dev_loss_tmo LLDD callback :
Called to essentially confirm the deletion of an rport. Thus, it is
called whenever the dev_loss_tmo fires, or when the rport is deleted
due to other circumstances (module unload, etc). It is expected that
the callback will initiate the termination of any outstanding i/o on
the rport.
- fast_io_fail_tmo and LLD callback:
There are some cases where it may take a long while to truly determine
device loss, but the system is in a multipathing configuration that if
the i/o was failed quickly (faster than dev_loss_tmo), it could be
redirected to a different path and completed sooner.
Many thanks to Mike Reed who cleaned up the initial RFC in support
of this post.
The original RFC is at:
http://marc.theaimsgroup.com/?l=linux-scsi&m=115505981027246&w=2
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_transport_fc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h index 0b11eff989e0..fd352323378b 100644 --- a/include/scsi/scsi_transport_fc.h +++ b/include/scsi/scsi_transport_fc.h @@ -195,6 +195,7 @@ struct fc_rport { /* aka fc_starget_attrs */ u32 roles; enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */ u32 scsi_target_id; + u32 fast_io_fail_tmo; /* exported data */ void *dd_data; /* Used for driver-specific storage */ @@ -207,6 +208,7 @@ struct fc_rport { /* aka fc_starget_attrs */ struct device dev; struct work_struct dev_loss_work; struct work_struct scan_work; + struct work_struct fail_io_work; struct work_struct stgt_delete_work; struct work_struct rport_delete_work; } __attribute__((aligned(sizeof(unsigned long)))); @@ -445,6 +447,9 @@ struct fc_function_template { int (*issue_fc_host_lip)(struct Scsi_Host *); + void (*dev_loss_tmo_callbk)(struct fc_rport *); + void (*terminate_rport_io)(struct fc_rport *); + /* allocation lengths for host-specific data */ u32 dd_fcrport_size; |