forked from luck/tmp_suning_uos_patched
[SCSI] libfc: do not log off rports before or after discovery
When receiving an RSCN, do not log off all rports. This is extremely disruptive. If, after the GPN_FT response, some rports haven't been listed, delete them. Add field disc_id to structs fc_rport_priv and fc_disc. disc_id is an arbitrary serial number used to identify the rports found by the latest discovery. This eliminates the need to go through the rport list when restarting discovery. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
parent
8025b5db7e
commit
0f6c614987
@ -221,16 +221,18 @@ static void fc_disc_recv_req(struct fc_seq *sp, struct fc_frame *fp,
|
||||
*/
|
||||
static void fc_disc_restart(struct fc_disc *disc)
|
||||
{
|
||||
struct fc_rport_priv *rdata, *next;
|
||||
struct fc_lport *lport = disc->lport;
|
||||
|
||||
FC_DISC_DBG(disc, "Restarting discovery\n");
|
||||
|
||||
list_for_each_entry_safe(rdata, next, &disc->rports, peers)
|
||||
lport->tt.rport_logoff(rdata);
|
||||
|
||||
disc->requested = 1;
|
||||
if (!disc->pending)
|
||||
if (disc->pending)
|
||||
return;
|
||||
|
||||
/*
|
||||
* Advance disc_id. This is an arbitrary non-zero number that will
|
||||
* match the value in the fc_rport_priv after discovery for all
|
||||
* freshly-discovered remote ports. Avoid wrapping to zero.
|
||||
*/
|
||||
disc->disc_id = (disc->disc_id + 2) | 1;
|
||||
fc_disc_gpn_ft_req(disc);
|
||||
}
|
||||
|
||||
@ -278,6 +280,7 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
|
||||
}
|
||||
kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
|
||||
} else {
|
||||
disc->disc_id = (disc->disc_id + 2) | 1;
|
||||
fc_disc_gpn_ft_req(disc); /* get ports by FC-4 type */
|
||||
}
|
||||
|
||||
@ -345,13 +348,30 @@ static int fc_disc_new_target(struct fc_disc *disc,
|
||||
static void fc_disc_done(struct fc_disc *disc, enum fc_disc_event event)
|
||||
{
|
||||
struct fc_lport *lport = disc->lport;
|
||||
struct fc_rport_priv *rdata;
|
||||
|
||||
FC_DISC_DBG(disc, "Discovery complete\n");
|
||||
|
||||
if (disc->requested)
|
||||
fc_disc_gpn_ft_req(disc);
|
||||
else
|
||||
disc->pending = 0;
|
||||
if (disc->requested) {
|
||||
fc_disc_restart(disc);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Go through all remote ports. If they were found in the latest
|
||||
* discovery, reverify or log them in. Otherwise, log them out.
|
||||
* Skip ports which were never discovered. These are the dNS port
|
||||
* and ports which were created by PLOGI.
|
||||
*/
|
||||
list_for_each_entry(rdata, &disc->rports, peers) {
|
||||
if (!rdata->disc_id)
|
||||
continue;
|
||||
if (rdata->disc_id == disc->disc_id)
|
||||
lport->tt.rport_login(rdata);
|
||||
else
|
||||
lport->tt.rport_logoff(rdata);
|
||||
}
|
||||
|
||||
mutex_unlock(&disc->disc_mutex);
|
||||
disc->disc_callback(lport, event);
|
||||
@ -496,7 +516,7 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
|
||||
ids.port_name != lport->wwpn) {
|
||||
rdata = lport->tt.rport_create(lport, &ids);
|
||||
if (rdata)
|
||||
lport->tt.rport_login(rdata);
|
||||
rdata->disc_id = disc->disc_id;
|
||||
else
|
||||
printk(KERN_WARNING "libfc: Failed to allocate "
|
||||
"memory for the newly discovered port "
|
||||
@ -640,6 +660,7 @@ static void fc_disc_single(struct fc_disc *disc, struct fc_disc_port *dp)
|
||||
|
||||
rdata = lport->tt.rport_create(lport, &dp->ids);
|
||||
if (rdata) {
|
||||
rdata->disc_id = disc->disc_id;
|
||||
kfree(dp);
|
||||
lport->tt.rport_login(rdata);
|
||||
}
|
||||
|
@ -202,6 +202,7 @@ struct fc_rport_libfc_priv {
|
||||
* @ids: remote port identifiers and roles
|
||||
* @flags: REC and RETRY supported flags
|
||||
* @max_seq: maximum number of concurrent sequences
|
||||
* @disc_id: discovery identifier
|
||||
* @maxframe_size: maximum frame size
|
||||
* @retries: retry count in current state
|
||||
* @e_d_tov: error detect timeout value (in msec)
|
||||
@ -218,6 +219,7 @@ struct fc_rport_priv {
|
||||
struct fc_rport_identifiers ids;
|
||||
u16 flags;
|
||||
u16 max_seq;
|
||||
u16 disc_id;
|
||||
u16 maxframe_size;
|
||||
unsigned int retries;
|
||||
unsigned int e_d_tov;
|
||||
@ -678,6 +680,7 @@ struct fc_disc {
|
||||
unsigned char requested;
|
||||
unsigned short seq_count;
|
||||
unsigned char buf_len;
|
||||
u16 disc_id;
|
||||
|
||||
void (*disc_callback)(struct fc_lport *,
|
||||
enum fc_disc_event);
|
||||
|
Loading…
Reference in New Issue
Block a user