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[infiniband] Add last_opened_ibdev(), analogous to last_opened_netdev()

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The minimal-surprise behaviour, when no explicit SRP initiator device
is specified, will probably be to use the most recently opened
Infiniband device.  This matches our behaviour with using the most
recently opened net device for PXE, iSCSI, AoE, NBI, etc.
This commit is contained in:
Michael Brown
2009-08-10 11:47:11 +01:00
parent 419243e7f1
commit 8de49af0d2
3 changed files with 27 additions and 1 deletions
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23
src/net/infiniband.c
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@@ -45,6 +45,9 @@ FILE_LICENCE ( GPL2_OR_LATER );
/** List of Infiniband devices */
struct list_head ib_devices = LIST_HEAD_INIT ( ib_devices );
/** List of open Infiniband devices, in reverse order of opening */
static struct list_head open_ib_devices = LIST_HEAD_INIT ( open_ib_devices );
/***************************************************************************
*
* Completion queues
@@ -565,6 +568,9 @@ int ib_open ( struct ib_device *ibdev ) {
goto err_open;
}
/* Add to head of open devices list */
list_add ( &ibdev->open_list, &open_ib_devices );
assert ( ibdev->open_count == 1 );
return 0;
@@ -593,6 +599,7 @@ void ib_close ( struct ib_device *ibdev ) {
/* Close device if this was the last remaining requested opening */
if ( ibdev->open_count == 0 ) {
list_del ( &ibdev->open_list );
ib_destroy_mi ( ibdev, ibdev->gsi );
ib_destroy_sma ( ibdev, ibdev->smi );
ib_destroy_mi ( ibdev, ibdev->smi );
@@ -898,3 +905,19 @@ struct ib_device * find_ibdev ( struct ib_gid *gid ) {
}
return NULL;
}
/**
* Get most recently opened Infiniband device
*
* @ret ibdev Most recently opened Infiniband device, or NULL
*/
struct ib_device * last_opened_ibdev ( void ) {
struct ib_device *ibdev;
list_for_each_entry ( ibdev, &open_ib_devices, open_list ) {
assert ( ibdev->open_count != 0 );
return ibdev;
}
return NULL;
}