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[SCSI] libfc: do not log off rports before or after discovery

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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:
Joe Eykholt
2009-08-25 14:02:11 -07:00
committed by James Bottomley
parent 8025b5db7e
commit 0f6c614987
2 changed files with 37 additions and 13 deletions
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3
include/scsi/libfc.h
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@ -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);