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zfcpdbf: Print plogi and prli within open port response as payload

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Print plogi and prli of each incoming open port response. Additional
payload ‘fsf_els’ HBA area to trace and print the new open port response
details.

Relevant kernel dbf structure changes are done in a separate patch. New
fields plogi_len and prli_len (u32 i.e. 4 hex digits at new appended
offsets 112 and 120) and payload record(s) are available.
The kernel structure with added members,
struct zfcp_dbf_hba_res {
	u64                        req_issued;           /*     0     8 */
	u32                        prot_status;          /*     8     4 */
	u8                         prot_status_qual[16]; /*    12    16 */
	u32                        fsf_status;           /*    28     4 */
	u8                         fsf_status_qual[16];  /*    32    16 */
	u32                        port_handle;          /*    48     4 */
	u32                        lun_handle;           /*    52     4 */
	u32                        plogi_len;            /*    56     4 */
	u32                        prli_len;             /*    60     4 */
};

zfcpdbf partial output for HBA area with relevant kernel code changes
displaying PLOGI/ PRLI info log with length for each:

PLOGI length   : 116
PRLI length    : 20
Payload time   : 2026-01-29-06:19:15:626629
PLOGI/PRLIinfo : 02000000 00000000 80000800 000a0002
                 00000000 2002000e 1115c62f 2001000e
                 1115c62f 00000000 00000000 00000000
                 00000000 80000000 00000000 00000000
                 00000000 80000000 00000000 000a0000
                 00010000 00000000 00000000 00000000
                 00000000 00000000 00000000 00000000
                 00000000 02100014 08002100 00000000
                 00000000 00000112

Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: Chinmaya Kajagar <chinmayk@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Chinmaya Kajagar
2025-10-14 07:01:33 +02:00
committed by Jan Höppner
parent 1c3547d205
commit 6fc1ed1a67
1 changed files with 18 additions and 1 deletions
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19
scripts/zfcpdbf
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@@ -2,7 +2,7 @@
#
# zfcpdbf - Tool to interpret the information from logging/tracing sources
#
# Copyright IBM Corp. 2010, 2020
# Copyright IBM Corp. 2010, 2026
#
# s390-tools is free software; you can redistribute it and/or modify
# it under the terms of the MIT license. See LICENSE for details.
@@ -102,6 +102,7 @@ use POSIX qw(strftime floor difftime mktime);
use File::Spec::Functions qw/catfile catdir rel2abs/;
use File::Basename;
use Getopt::Long;
use List::Util qw(min);
use constant TOD_UNIX_EPOCH => 0x7d91048bca000000;
use constant STD_DEBUG_DIR => "/sys/kernel/debug/s390dbf/";
@@ -595,6 +596,9 @@ sub _print_hba_id1
my $rec_received = shift();
my $rec_issued;
my $pay_rec = $PAYLOAD_RECORDS{$fsf_req_id}{"fsf_res"};
my $plogi_length = hex(substr($rec, 112, 8));
my $prli_length = hex(substr($rec, 120, 8));
my $els_rec = $PAYLOAD_RECORDS{$fsf_req_id}{"fsf_els"};
$rec_issued = stck_to_timeval(substr($rec, 0, 16));
@@ -627,6 +631,19 @@ sub _print_hba_id1
print "QTCB log length: ", $payload_length, "\n" if ($payload_length);
print_payload($payload_length, $pay_rec, "QTCB log info")
if ($payload_length);
if ($plogi_length) {
print "PLOGI length : ", $plogi_length, "\n";
$plogi_length = min($plogi_length, 256);
}
if ($prli_length) {
print "PRLI length : ", $prli_length, "\n";
$prli_length = min($prli_length, 256 - $plogi_length);
}
if ($plogi_length || $prli_length) {
print_payload($plogi_length + $prli_length, $els_rec,
"PLOGI/PRLIinfo");
}
}
sub _print_hba_id2