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Support for persistent reservations.

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Add a method for template get_initiator_port_transport_id()
to allow persistent reservations to work. 

Initialize struct ft_sess more fully before scst_register_session()
so that ft_get_transport_id() can use it.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1759 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Joe Eykholt
2010-06-10 21:47:17 +00:00
parent 64a5ad5169
commit 546647be44
3 changed files with 39 additions and 10 deletions
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1
fcst/fcst.h
View File

@@ -128,6 +128,7 @@ int ft_tgt_release(struct scst_tgt *);
int ft_tgt_enable(struct scst_tgt *, bool);
bool ft_tgt_enabled(struct scst_tgt *);
int ft_report_aen(struct scst_aen *);
int ft_get_transport_id(struct scst_session *, uint8_t **);
/*
* Session interface.

1
fcst/ft_scst.c
View File

@@ -61,6 +61,7 @@ struct scst_tgt_template ft_scst_template = {
.report_aen = ft_report_aen,
.enable_target = ft_tgt_enable,
.is_target_enabled = ft_tgt_enabled,
.get_initiator_port_transport_id = ft_get_transport_id,
.max_hw_pending_time = FT_MAX_HW_PENDING_TIME,
.name = FT_MODULE,
};

47
fcst/ft_sess.c
View File

@@ -212,6 +212,16 @@ static int ft_sess_create(struct ft_tport *tport, struct fc_rport_priv *rdata,
if (!sess)
return FC_SPP_RESP_RES; /* out of resources */
sess->port_name = rdata->ids.port_name;
sess->max_payload = rdata->maxframe_size;
sess->max_lso_payload = rdata->maxframe_size;
if (tport->lport->seq_offload)
sess->max_lso_payload = tport->lport->lso_max;
sess->params = fcp_parm;
sess->tport = tport;
sess->port_id = port_id;
kref_init(&sess->kref); /* ref for table entry */
ft_format_wwn(name, sizeof(name), rdata->ids.port_name);
FT_SESS_DBG("register %s\n", name);
scst_sess = scst_register_session(tport->tgt, 0, name, sess, NULL,
@@ -221,21 +231,11 @@ static int ft_sess_create(struct ft_tport *tport, struct fc_rport_priv *rdata,
return FC_SPP_RESP_RES; /* out of resources */
}
sess->scst_sess = scst_sess;
sess->tport = tport;
sess->port_id = port_id;
kref_init(&sess->kref); /* ref for table entry */
hlist_add_head_rcu(&sess->hash, head);
tport->sess_count++;
FT_SESS_DBG("port_id %x sess %p\n", port_id, sess);
sess->port_name = rdata->ids.port_name;
sess->max_payload = rdata->maxframe_size;
sess->max_lso_payload = rdata->maxframe_size;
if (tport->lport->seq_offload)
sess->max_lso_payload = tport->lport->lso_max;
sess->params = fcp_parm;
rdata->prli_count++;
return 0;
}
@@ -294,6 +294,33 @@ static void ft_sess_close(struct ft_sess *sess)
/* XXX should send LOGO or PRLO to rport */
}
/*
* Allocate and fill in the SPC Transport ID for persistent reservations.
*/
int ft_get_transport_id(struct scst_session *scst_sess, uint8_t **result)
{
struct ft_sess *sess;
struct {
u8 format_proto; /* format and protocol ID (0 for FC) */
u8 __resv1[7];
__be64 port_name; /* N_Port Name */
u8 __resv2[8];
} __attribute__((__packed__)) *id;
if (!scst_sess)
return SCSI_TRANSPORTID_PROTOCOLID_FCP2;
id = kzalloc(sizeof(*id), GFP_KERNEL);
if (!id)
return -ENOMEM;
sess = scst_sess_get_tgt_priv(scst_sess);
id->port_name = cpu_to_be64(sess->port_name);
id->format_proto = SCSI_TRANSPORTID_PROTOCOLID_FCP2;
*result = (uint8_t *)id;
return 0;
}
/*
* libfc ops involving sessions.
*/