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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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33
src/include/ipxe/fc.h
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@@ -357,7 +357,15 @@ struct fc_peer {
/** List of upper-layer protocols */
struct list_head ulps;
/** Active usage count */
/** Active usage count
*
* A peer (and attached ULPs) may be created in response to
* unsolicited login requests received via the fabric. We
* track our own active usage count independently of the
* existence of the peer, so that if the peer becomes logged
* out (e.g. due to a link failure) then we know whether or
* not we should attempt to relogin.
*/
unsigned int usage;
};
@@ -424,8 +432,15 @@ struct fc_ulp {
/** Service parameter length */
size_t param_len;
/** Active usage count */
unsigned int usage;
/** Active users of this upper-layer protocol
*
* As with peers, an upper-layer protocol may be created in
* response to an unsolicited login request received via the
* fabric. This list records the number of active users of
* the ULP; the number of entries in the list is equivalent to
* the peer usage count.
*/
struct list_head users;
};
/** Fibre Channel upper-layer protocol flags */
@@ -434,6 +449,14 @@ enum fc_ulp_flags {
FC_ULP_ORIGINATED_LOGIN_OK = 0x0001,
};
/** A Fibre Channel upper-layer protocol user */
struct fc_ulp_user {
/** Fibre Channel upper layer protocol */
struct fc_ulp *ulp;
/** List of users */
struct list_head list;
};
/**
* Get reference to Fibre Channel upper-layer protocol
*
@@ -462,8 +485,8 @@ extern struct fc_ulp *
fc_ulp_get_port_id_type ( struct fc_port *port,
const struct fc_port_id *peer_port_id,
unsigned int type );
extern void fc_ulp_increment ( struct fc_ulp *ulp );
extern void fc_ulp_decrement ( struct fc_ulp *ulp );
extern void fc_ulp_attach ( struct fc_ulp *ulp, struct fc_ulp_user *user );
extern void fc_ulp_detach ( struct fc_ulp_user *user );
extern int fc_ulp_login ( struct fc_ulp *ulp, const void *param,
size_t param_len, int originated );
extern void fc_ulp_logout ( struct fc_ulp *ulp, int rc );