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[fc] Maintain a list of Fibre Channel upper-layer protocol users

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2011-06-24 22:49:10 +01:00
parent 5763472b34
commit bf8bfa23e2
4 changed files with 73 additions and 39 deletions
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44
src/net/fc.c
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@@ -1580,7 +1580,7 @@ static void fc_ulp_close ( struct fc_ulp *ulp, int rc ) {
fc_ntoa ( &ulp->peer->port_wwn ), ulp->type, strerror ( rc ) );
/* Sanity check */
assert ( ulp->usage == 0 );
assert ( list_empty ( &ulp->users ) );
/* Stop link monitor */
fc_link_stop ( &ulp->link );
@@ -1594,35 +1594,50 @@ static void fc_ulp_close ( struct fc_ulp *ulp, int rc ) {
}
/**
* Increment Fibre Channel upper-layer protocol active usage count
* Attach Fibre Channel upper-layer protocol user
*
* @v ulp Fibre Channel ulp
* @v ulp Fibre Channel upper-layer protocol
* @v user Fibre Channel upper-layer protocol user
*/
void fc_ulp_increment ( struct fc_ulp *ulp ) {
void fc_ulp_attach ( struct fc_ulp *ulp, struct fc_ulp_user *user ) {
/* Sanity check */
assert ( user->ulp == NULL );
/* Increment peer's usage count */
fc_peer_increment ( ulp->peer );
/* Increment our usage count */
ulp->usage++;
/* Attach user */
user->ulp = fc_ulp_get ( ulp );
list_add ( &user->list, &ulp->users );
}
/**
* Decrement Fibre Channel upper-layer protocol active usage count
* Detach Fibre Channel upper-layer protocol user
*
* @v ulp Fibre Channel ulp
* @v user Fibre Channel upper-layer protocol user
*/
void fc_ulp_decrement ( struct fc_ulp *ulp ) {
void fc_ulp_detach ( struct fc_ulp_user *user ) {
struct fc_ulp *ulp = user->ulp;
/* Sanity check */
assert ( ulp->usage > 0 );
/* Do nothing if not attached */
if ( ! ulp )
return;
/* Decrement our usage count and log out if we reach zero */
if ( --(ulp->usage) == 0 )
/* Sanity checks */
list_check_contains ( user, &ulp->users, list );
/* Detach user and log out if no users remain */
list_del ( &user->list );
if ( list_empty ( &ulp->users ) )
fc_ulp_logout ( ulp, 0 );
/* Decrement our peer's usage count */
fc_peer_decrement ( ulp->peer );
/* Drop reference */
user->ulp = NULL;
fc_ulp_put ( ulp );
}
/**
@@ -1712,7 +1727,7 @@ void fc_ulp_logout ( struct fc_ulp *ulp, int rc ) {
fc_link_err ( &ulp->link, rc );
/* Close ULP if there are no clients attached */
if ( ulp->usage == 0 )
if ( list_empty ( &ulp->users ) )
fc_ulp_close ( ulp, rc );
}
@@ -1795,6 +1810,7 @@ static struct fc_ulp * fc_ulp_create ( struct fc_peer *peer,
ulp->peer = fc_peer_get ( peer );
list_add_tail ( &ulp->list, &peer->ulps );
ulp->type = type;
INIT_LIST_HEAD ( &ulp->users );
/* Start link state monitor */
fc_link_start ( &ulp->link );