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authorJames Smart <James.Smart@Emulex.Com>2006-08-18 17:33:29 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-09-04 21:22:05 -0500
commit0f29b966d60e9a4f5ecff9f3832257b38aea4f13 (patch)
tree0b14cbcdf74aee4676c49353f816ae5f98c504ee /include/scsi
parentae36764a230ff6a278ed93735acf5fcda08f2786 (diff)
[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.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 0b11eff989e..fd352323378 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;