forked from Minki/linux
616da39e00
Trace changes in Fibre Channel Endpoint Security capabilities of FCP devices as well as changes in Fibre Channel Endpoint Security state of their connections to FC remote ports as FC Endpoint Security changes with trace level 3 in HBA DBF. A change in FC Endpoint Security capabilities of FCP devices is traced as response to FSF command FSF_QTCB_EXCHANGE_PORT_DATA with a trace tag of "fsfcesa" and a WWPN of ZFCP_DBF_INVALID_WWPN = 0x0000000000000000 (see FC-FS-4 §18 "Name_Identifier Formats", NAA field). A change in FC Endpoint Security state of connections between FCP devices and FC remote ports is traced as response to FSF command FSF_QTCB_OPEN_PORT_WITH_DID with a trace tag of "fsfcesp". Example trace record of FC Endpoint Security capability change of FCP device formatted with zfcpdbf from s390-tools: Timestamp : ... Area : HBA Subarea : 00 Level : 3 Exception : - CPU ID : ... Caller : 0x... Record ID : 5 ZFCP_DBF_HBA_FCES Tag : fsfcesa FSF FC Endpoint Security adapter Request ID : 0x... Request status : 0x00000010 FSF cmnd : 0x0000000e FSF_QTCB_EXCHANGE_PORT_DATA FSF sequence no: 0x... FSF issued : ... FSF stat : 0x00000000 FSF_GOOD FSF stat qual : n/a Prot stat : n/a Prot stat qual : n/a Port handle : 0x00000000 none (invalid) LUN handle : n/a WWPN : 0x0000000000000000 ZFCP_DBF_INVALID_WWPN FCES old : 0x00000000 old FC Endpoint Security FCES new : 0x00000007 new FC Endpoint Security Example trace record of FC Endpoint Security change of connection to FC remote port formatted with zfcpdbf from s390-tools: Timestamp : ... Area : HBA Subarea : 00 Level : 3 Exception : - CPU ID : ... Caller : 0x... Record ID : 5 ZFCP_DBF_HBA_FCES Tag : fsfcesp FSF FC Endpoint Security port Request ID : 0x... Request status : 0x00000010 FSF cmnd : 0x00000005 FSF_QTCB_OPEN_PORT_WITH_DID FSF sequence no: 0x... FSF issued : ... FSF stat : 0x00000000 FSF_GOOD FSF stat qual : n/a Prot stat : n/a Prot stat qual : n/a Port handle : 0x... WWPN : 0x500507630401120c WWPN FCES old : 0x00000000 old FC Endpoint Security FCES new : 0x00000004 new FC Endpoint Security Link: https://lore.kernel.org/r/20200312174505.51294-9-maier@linux.ibm.com Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Jens Remus <jremus@linux.ibm.com> Signed-off-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
863 lines
25 KiB
C
863 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* zfcp device driver
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*
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* Debug traces for zfcp.
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*
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* Copyright IBM Corp. 2002, 2020
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*/
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#define KMSG_COMPONENT "zfcp"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <asm/debug.h>
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#include "zfcp_dbf.h"
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#include "zfcp_ext.h"
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#include "zfcp_fc.h"
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static u32 dbfsize = 4;
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module_param(dbfsize, uint, 0400);
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MODULE_PARM_DESC(dbfsize,
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"number of pages for each debug feature area (default 4)");
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static u32 dbflevel = 3;
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module_param(dbflevel, uint, 0400);
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MODULE_PARM_DESC(dbflevel,
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"log level for each debug feature area "
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"(default 3, range 0..6)");
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static inline unsigned int zfcp_dbf_plen(unsigned int offset)
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{
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return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC;
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}
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static inline
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void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area,
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u64 req_id)
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{
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struct zfcp_dbf_pay *pl = &dbf->pay_buf;
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u16 offset = 0, rec_length;
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spin_lock(&dbf->pay_lock);
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memset(pl, 0, sizeof(*pl));
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pl->fsf_req_id = req_id;
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memcpy(pl->area, area, ZFCP_DBF_TAG_LEN);
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while (offset < length) {
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rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC,
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(u16) (length - offset));
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memcpy(pl->data, data + offset, rec_length);
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debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length));
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offset += rec_length;
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pl->counter++;
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}
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spin_unlock(&dbf->pay_lock);
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}
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/**
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* zfcp_dbf_hba_fsf_res - trace event for fsf responses
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* @tag: tag indicating which kind of FSF response has been received
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* @level: trace level to be used for event
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* @req: request for which a response was received
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*/
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void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req)
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{
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struct zfcp_dbf *dbf = req->adapter->dbf;
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struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;
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struct fsf_qtcb_header *q_head = &req->qtcb->header;
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struct zfcp_dbf_hba *rec = &dbf->hba_buf;
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unsigned long flags;
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spin_lock_irqsave(&dbf->hba_lock, flags);
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memset(rec, 0, sizeof(*rec));
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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rec->id = ZFCP_DBF_HBA_RES;
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rec->fsf_req_id = req->req_id;
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rec->fsf_req_status = req->status;
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rec->fsf_cmd = q_head->fsf_command;
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rec->fsf_seq_no = q_pref->req_seq_no;
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rec->u.res.req_issued = req->issued;
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rec->u.res.prot_status = q_pref->prot_status;
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rec->u.res.fsf_status = q_head->fsf_status;
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rec->u.res.port_handle = q_head->port_handle;
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rec->u.res.lun_handle = q_head->lun_handle;
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memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual,
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FSF_PROT_STATUS_QUAL_SIZE);
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memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual,
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FSF_STATUS_QUALIFIER_SIZE);
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rec->pl_len = q_head->log_length;
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zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start,
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rec->pl_len, "fsf_res", req->req_id);
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debug_event(dbf->hba, level, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->hba_lock, flags);
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}
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/**
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* zfcp_dbf_hba_fsf_fces - trace event for fsf responses related to
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* FC Endpoint Security (FCES)
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* @tag: tag indicating which kind of FC Endpoint Security event has occurred
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* @req: request for which a response was received
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* @wwpn: remote port or ZFCP_DBF_INVALID_WWPN
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* @fc_security_old: old FC Endpoint Security of FCP device or connection
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* @fc_security_new: new FC Endpoint Security of FCP device or connection
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*/
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void zfcp_dbf_hba_fsf_fces(char *tag, const struct zfcp_fsf_req *req, u64 wwpn,
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u32 fc_security_old, u32 fc_security_new)
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{
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struct zfcp_dbf *dbf = req->adapter->dbf;
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struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;
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struct fsf_qtcb_header *q_head = &req->qtcb->header;
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struct zfcp_dbf_hba *rec = &dbf->hba_buf;
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static int const level = 3;
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unsigned long flags;
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if (unlikely(!debug_level_enabled(dbf->hba, level)))
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return;
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spin_lock_irqsave(&dbf->hba_lock, flags);
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memset(rec, 0, sizeof(*rec));
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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rec->id = ZFCP_DBF_HBA_FCES;
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rec->fsf_req_id = req->req_id;
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rec->fsf_req_status = req->status;
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rec->fsf_cmd = q_head->fsf_command;
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rec->fsf_seq_no = q_pref->req_seq_no;
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rec->u.fces.req_issued = req->issued;
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rec->u.fces.fsf_status = q_head->fsf_status;
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rec->u.fces.port_handle = q_head->port_handle;
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rec->u.fces.wwpn = wwpn;
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rec->u.fces.fc_security_old = fc_security_old;
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rec->u.fces.fc_security_new = fc_security_new;
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debug_event(dbf->hba, level, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->hba_lock, flags);
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}
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/**
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* zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer
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* @tag: tag indicating which kind of unsolicited status has been received
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* @req: request providing the unsolicited status
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*/
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void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req)
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{
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struct zfcp_dbf *dbf = req->adapter->dbf;
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struct fsf_status_read_buffer *srb = req->data;
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struct zfcp_dbf_hba *rec = &dbf->hba_buf;
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static int const level = 2;
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unsigned long flags;
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if (unlikely(!debug_level_enabled(dbf->hba, level)))
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return;
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spin_lock_irqsave(&dbf->hba_lock, flags);
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memset(rec, 0, sizeof(*rec));
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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rec->id = ZFCP_DBF_HBA_USS;
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rec->fsf_req_id = req->req_id;
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rec->fsf_req_status = req->status;
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rec->fsf_cmd = FSF_QTCB_UNSOLICITED_STATUS;
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if (!srb)
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goto log;
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rec->u.uss.status_type = srb->status_type;
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rec->u.uss.status_subtype = srb->status_subtype;
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rec->u.uss.d_id = ntoh24(srb->d_id);
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rec->u.uss.lun = srb->fcp_lun;
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memcpy(&rec->u.uss.queue_designator, &srb->queue_designator,
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sizeof(rec->u.uss.queue_designator));
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/* status read buffer payload length */
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rec->pl_len = (!srb->length) ? 0 : srb->length -
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offsetof(struct fsf_status_read_buffer, payload);
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if (rec->pl_len)
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zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len,
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"fsf_uss", req->req_id);
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log:
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debug_event(dbf->hba, level, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->hba_lock, flags);
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}
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/**
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* zfcp_dbf_hba_bit_err - trace event for bit error conditions
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* @tag: tag indicating which kind of bit error unsolicited status was received
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* @req: request which caused the bit_error condition
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*/
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void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req)
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{
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struct zfcp_dbf *dbf = req->adapter->dbf;
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struct zfcp_dbf_hba *rec = &dbf->hba_buf;
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struct fsf_status_read_buffer *sr_buf = req->data;
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static int const level = 1;
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unsigned long flags;
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if (unlikely(!debug_level_enabled(dbf->hba, level)))
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return;
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spin_lock_irqsave(&dbf->hba_lock, flags);
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memset(rec, 0, sizeof(*rec));
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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rec->id = ZFCP_DBF_HBA_BIT;
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rec->fsf_req_id = req->req_id;
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rec->fsf_req_status = req->status;
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rec->fsf_cmd = FSF_QTCB_UNSOLICITED_STATUS;
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memcpy(&rec->u.be, &sr_buf->payload.bit_error,
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sizeof(struct fsf_bit_error_payload));
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debug_event(dbf->hba, level, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->hba_lock, flags);
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}
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/**
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* zfcp_dbf_hba_def_err - trace event for deferred error messages
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* @adapter: pointer to struct zfcp_adapter
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* @req_id: request id which caused the deferred error message
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* @scount: number of sbals incl. the signaling sbal
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* @pl: array of all involved sbals
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*/
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void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount,
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void **pl)
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{
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struct zfcp_dbf *dbf = adapter->dbf;
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struct zfcp_dbf_pay *payload = &dbf->pay_buf;
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unsigned long flags;
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static int const level = 1;
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u16 length;
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if (unlikely(!debug_level_enabled(dbf->pay, level)))
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return;
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if (!pl)
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return;
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spin_lock_irqsave(&dbf->pay_lock, flags);
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memset(payload, 0, sizeof(*payload));
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memcpy(payload->area, "def_err", 7);
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payload->fsf_req_id = req_id;
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payload->counter = 0;
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length = min((u16)sizeof(struct qdio_buffer),
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(u16)ZFCP_DBF_PAY_MAX_REC);
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while (payload->counter < scount && (char *)pl[payload->counter]) {
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memcpy(payload->data, (char *)pl[payload->counter], length);
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debug_event(dbf->pay, level, payload, zfcp_dbf_plen(length));
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payload->counter++;
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}
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spin_unlock_irqrestore(&dbf->pay_lock, flags);
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}
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/**
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* zfcp_dbf_hba_basic - trace event for basic adapter events
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* @tag: identifier for event
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* @adapter: pointer to struct zfcp_adapter
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*/
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void zfcp_dbf_hba_basic(char *tag, struct zfcp_adapter *adapter)
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{
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struct zfcp_dbf *dbf = adapter->dbf;
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struct zfcp_dbf_hba *rec = &dbf->hba_buf;
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static int const level = 1;
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unsigned long flags;
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if (unlikely(!debug_level_enabled(dbf->hba, level)))
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return;
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spin_lock_irqsave(&dbf->hba_lock, flags);
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memset(rec, 0, sizeof(*rec));
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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rec->id = ZFCP_DBF_HBA_BASIC;
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debug_event(dbf->hba, level, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->hba_lock, flags);
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}
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static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec,
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struct zfcp_adapter *adapter,
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struct zfcp_port *port,
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struct scsi_device *sdev)
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{
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rec->adapter_status = atomic_read(&adapter->status);
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if (port) {
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rec->port_status = atomic_read(&port->status);
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rec->wwpn = port->wwpn;
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rec->d_id = port->d_id;
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}
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if (sdev) {
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rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status);
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rec->lun = zfcp_scsi_dev_lun(sdev);
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} else
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rec->lun = ZFCP_DBF_INVALID_LUN;
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}
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/**
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* zfcp_dbf_rec_trig - trace event related to triggered recovery
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* @tag: identifier for event
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* @adapter: adapter on which the erp_action should run
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* @port: remote port involved in the erp_action
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* @sdev: scsi device involved in the erp_action
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* @want: wanted erp_action
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* @need: required erp_action
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*
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* The adapter->erp_lock has to be held.
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*/
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void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter,
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struct zfcp_port *port, struct scsi_device *sdev,
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u8 want, u8 need)
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{
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struct zfcp_dbf *dbf = adapter->dbf;
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struct zfcp_dbf_rec *rec = &dbf->rec_buf;
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static int const level = 1;
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struct list_head *entry;
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unsigned long flags;
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lockdep_assert_held(&adapter->erp_lock);
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if (unlikely(!debug_level_enabled(dbf->rec, level)))
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return;
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spin_lock_irqsave(&dbf->rec_lock, flags);
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memset(rec, 0, sizeof(*rec));
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rec->id = ZFCP_DBF_REC_TRIG;
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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zfcp_dbf_set_common(rec, adapter, port, sdev);
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list_for_each(entry, &adapter->erp_ready_head)
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rec->u.trig.ready++;
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list_for_each(entry, &adapter->erp_running_head)
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rec->u.trig.running++;
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rec->u.trig.want = want;
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rec->u.trig.need = need;
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debug_event(dbf->rec, level, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->rec_lock, flags);
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}
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/**
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* zfcp_dbf_rec_trig_lock - trace event related to triggered recovery with lock
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* @tag: identifier for event
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* @adapter: adapter on which the erp_action should run
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* @port: remote port involved in the erp_action
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* @sdev: scsi device involved in the erp_action
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* @want: wanted erp_action
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* @need: required erp_action
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*
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* The adapter->erp_lock must not be held.
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*/
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void zfcp_dbf_rec_trig_lock(char *tag, struct zfcp_adapter *adapter,
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struct zfcp_port *port, struct scsi_device *sdev,
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u8 want, u8 need)
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{
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unsigned long flags;
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read_lock_irqsave(&adapter->erp_lock, flags);
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zfcp_dbf_rec_trig(tag, adapter, port, sdev, want, need);
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read_unlock_irqrestore(&adapter->erp_lock, flags);
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}
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/**
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* zfcp_dbf_rec_run_lvl - trace event related to running recovery
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* @level: trace level to be used for event
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* @tag: identifier for event
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* @erp: erp_action running
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*/
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void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp)
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{
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struct zfcp_dbf *dbf = erp->adapter->dbf;
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struct zfcp_dbf_rec *rec = &dbf->rec_buf;
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unsigned long flags;
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if (!debug_level_enabled(dbf->rec, level))
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return;
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spin_lock_irqsave(&dbf->rec_lock, flags);
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memset(rec, 0, sizeof(*rec));
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rec->id = ZFCP_DBF_REC_RUN;
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev);
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rec->u.run.fsf_req_id = erp->fsf_req_id;
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rec->u.run.rec_status = erp->status;
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rec->u.run.rec_step = erp->step;
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rec->u.run.rec_action = erp->type;
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if (erp->sdev)
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rec->u.run.rec_count =
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atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter);
|
|
else if (erp->port)
|
|
rec->u.run.rec_count = atomic_read(&erp->port->erp_counter);
|
|
else
|
|
rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter);
|
|
|
|
debug_event(dbf->rec, level, rec, sizeof(*rec));
|
|
spin_unlock_irqrestore(&dbf->rec_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_rec_run - trace event related to running recovery
|
|
* @tag: identifier for event
|
|
* @erp: erp_action running
|
|
*/
|
|
void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)
|
|
{
|
|
zfcp_dbf_rec_run_lvl(1, tag, erp);
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery
|
|
* @tag: identifier for event
|
|
* @wka_port: well known address port
|
|
* @req_id: request ID to correlate with potential HBA trace record
|
|
*/
|
|
void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port,
|
|
u64 req_id)
|
|
{
|
|
struct zfcp_dbf *dbf = wka_port->adapter->dbf;
|
|
struct zfcp_dbf_rec *rec = &dbf->rec_buf;
|
|
static int const level = 1;
|
|
unsigned long flags;
|
|
|
|
if (unlikely(!debug_level_enabled(dbf->rec, level)))
|
|
return;
|
|
|
|
spin_lock_irqsave(&dbf->rec_lock, flags);
|
|
memset(rec, 0, sizeof(*rec));
|
|
|
|
rec->id = ZFCP_DBF_REC_RUN;
|
|
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
|
|
rec->port_status = wka_port->status;
|
|
rec->d_id = wka_port->d_id;
|
|
rec->lun = ZFCP_DBF_INVALID_LUN;
|
|
|
|
rec->u.run.fsf_req_id = req_id;
|
|
rec->u.run.rec_status = ~0;
|
|
rec->u.run.rec_step = ~0;
|
|
rec->u.run.rec_action = ~0;
|
|
rec->u.run.rec_count = ~0;
|
|
|
|
debug_event(dbf->rec, level, rec, sizeof(*rec));
|
|
spin_unlock_irqrestore(&dbf->rec_lock, flags);
|
|
}
|
|
|
|
#define ZFCP_DBF_SAN_LEVEL 1
|
|
|
|
static inline
|
|
void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf,
|
|
char *paytag, struct scatterlist *sg, u8 id, u16 len,
|
|
u64 req_id, u32 d_id, u16 cap_len)
|
|
{
|
|
struct zfcp_dbf_san *rec = &dbf->san_buf;
|
|
u16 rec_len;
|
|
unsigned long flags;
|
|
struct zfcp_dbf_pay *payload = &dbf->pay_buf;
|
|
u16 pay_sum = 0;
|
|
|
|
spin_lock_irqsave(&dbf->san_lock, flags);
|
|
memset(rec, 0, sizeof(*rec));
|
|
|
|
rec->id = id;
|
|
rec->fsf_req_id = req_id;
|
|
rec->d_id = d_id;
|
|
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
|
|
rec->pl_len = len; /* full length even if we cap pay below */
|
|
if (!sg)
|
|
goto out;
|
|
rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD);
|
|
memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */
|
|
if (len <= rec_len)
|
|
goto out; /* skip pay record if full content in rec->payload */
|
|
|
|
/* if (len > rec_len):
|
|
* dump data up to cap_len ignoring small duplicate in rec->payload
|
|
*/
|
|
spin_lock(&dbf->pay_lock);
|
|
memset(payload, 0, sizeof(*payload));
|
|
memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN);
|
|
payload->fsf_req_id = req_id;
|
|
payload->counter = 0;
|
|
for (; sg && pay_sum < cap_len; sg = sg_next(sg)) {
|
|
u16 pay_len, offset = 0;
|
|
|
|
while (offset < sg->length && pay_sum < cap_len) {
|
|
pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC,
|
|
(u16)(sg->length - offset));
|
|
/* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */
|
|
memcpy(payload->data, sg_virt(sg) + offset, pay_len);
|
|
debug_event(dbf->pay, ZFCP_DBF_SAN_LEVEL, payload,
|
|
zfcp_dbf_plen(pay_len));
|
|
payload->counter++;
|
|
offset += pay_len;
|
|
pay_sum += pay_len;
|
|
}
|
|
}
|
|
spin_unlock(&dbf->pay_lock);
|
|
|
|
out:
|
|
debug_event(dbf->san, ZFCP_DBF_SAN_LEVEL, rec, sizeof(*rec));
|
|
spin_unlock_irqrestore(&dbf->san_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_san_req - trace event for issued SAN request
|
|
* @tag: identifier for event
|
|
* @fsf: request containing issued CT or ELS data
|
|
* @d_id: N_Port_ID where SAN request is sent to
|
|
* d_id: destination ID
|
|
*/
|
|
void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id)
|
|
{
|
|
struct zfcp_dbf *dbf = fsf->adapter->dbf;
|
|
struct zfcp_fsf_ct_els *ct_els = fsf->data;
|
|
u16 length;
|
|
|
|
if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))
|
|
return;
|
|
|
|
length = (u16)zfcp_qdio_real_bytes(ct_els->req);
|
|
zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ,
|
|
length, fsf->req_id, d_id, length);
|
|
}
|
|
|
|
static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag,
|
|
struct zfcp_fsf_req *fsf,
|
|
u16 len)
|
|
{
|
|
struct zfcp_fsf_ct_els *ct_els = fsf->data;
|
|
struct fc_ct_hdr *reqh = sg_virt(ct_els->req);
|
|
struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1);
|
|
struct scatterlist *resp_entry = ct_els->resp;
|
|
struct fc_ct_hdr *resph;
|
|
struct fc_gpn_ft_resp *acc;
|
|
int max_entries, x, last = 0;
|
|
|
|
if (!(memcmp(tag, "fsscth2", 7) == 0
|
|
&& ct_els->d_id == FC_FID_DIR_SERV
|
|
&& reqh->ct_rev == FC_CT_REV
|
|
&& reqh->ct_in_id[0] == 0
|
|
&& reqh->ct_in_id[1] == 0
|
|
&& reqh->ct_in_id[2] == 0
|
|
&& reqh->ct_fs_type == FC_FST_DIR
|
|
&& reqh->ct_fs_subtype == FC_NS_SUBTYPE
|
|
&& reqh->ct_options == 0
|
|
&& reqh->_ct_resvd1 == 0
|
|
&& reqh->ct_cmd == cpu_to_be16(FC_NS_GPN_FT)
|
|
/* reqh->ct_mr_size can vary so do not match but read below */
|
|
&& reqh->_ct_resvd2 == 0
|
|
&& reqh->ct_reason == 0
|
|
&& reqh->ct_explan == 0
|
|
&& reqh->ct_vendor == 0
|
|
&& reqn->fn_resvd == 0
|
|
&& reqn->fn_domain_id_scope == 0
|
|
&& reqn->fn_area_id_scope == 0
|
|
&& reqn->fn_fc4_type == FC_TYPE_FCP))
|
|
return len; /* not GPN_FT response so do not cap */
|
|
|
|
acc = sg_virt(resp_entry);
|
|
|
|
/* cap all but accept CT responses to at least the CT header */
|
|
resph = (struct fc_ct_hdr *)acc;
|
|
if ((ct_els->status) ||
|
|
(resph->ct_cmd != cpu_to_be16(FC_FS_ACC)))
|
|
return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD);
|
|
|
|
max_entries = (be16_to_cpu(reqh->ct_mr_size) * 4 /
|
|
sizeof(struct fc_gpn_ft_resp))
|
|
+ 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one
|
|
* to account for header as 1st pseudo "entry" */;
|
|
|
|
/* the basic CT_IU preamble is the same size as one entry in the GPN_FT
|
|
* response, allowing us to skip special handling for it - just skip it
|
|
*/
|
|
for (x = 1; x < max_entries && !last; x++) {
|
|
if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
|
|
acc++;
|
|
else
|
|
acc = sg_virt(++resp_entry);
|
|
|
|
last = acc->fp_flags & FC_NS_FID_LAST;
|
|
}
|
|
len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp)));
|
|
return len; /* cap after last entry */
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_san_res - trace event for received SAN request
|
|
* @tag: identifier for event
|
|
* @fsf: request containing received CT or ELS data
|
|
*/
|
|
void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf)
|
|
{
|
|
struct zfcp_dbf *dbf = fsf->adapter->dbf;
|
|
struct zfcp_fsf_ct_els *ct_els = fsf->data;
|
|
u16 length;
|
|
|
|
if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))
|
|
return;
|
|
|
|
length = (u16)zfcp_qdio_real_bytes(ct_els->resp);
|
|
zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES,
|
|
length, fsf->req_id, ct_els->d_id,
|
|
zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length));
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_san_in_els - trace event for incoming ELS
|
|
* @tag: identifier for event
|
|
* @fsf: request containing received ELS data
|
|
*/
|
|
void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf)
|
|
{
|
|
struct zfcp_dbf *dbf = fsf->adapter->dbf;
|
|
struct fsf_status_read_buffer *srb =
|
|
(struct fsf_status_read_buffer *) fsf->data;
|
|
u16 length;
|
|
struct scatterlist sg;
|
|
|
|
if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))
|
|
return;
|
|
|
|
length = (u16)(srb->length -
|
|
offsetof(struct fsf_status_read_buffer, payload));
|
|
sg_init_one(&sg, srb->payload.data, length);
|
|
zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length,
|
|
fsf->req_id, ntoh24(srb->d_id), length);
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_scsi_common() - Common trace event helper for scsi.
|
|
* @tag: Identifier for event.
|
|
* @level: trace level of event.
|
|
* @sdev: Pointer to SCSI device as context for this event.
|
|
* @sc: Pointer to SCSI command, or NULL with task management function (TMF).
|
|
* @fsf: Pointer to FSF request, or NULL.
|
|
*/
|
|
void zfcp_dbf_scsi_common(char *tag, int level, struct scsi_device *sdev,
|
|
struct scsi_cmnd *sc, struct zfcp_fsf_req *fsf)
|
|
{
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *) sdev->host->hostdata[0];
|
|
struct zfcp_dbf *dbf = adapter->dbf;
|
|
struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
|
|
struct fcp_resp_with_ext *fcp_rsp;
|
|
struct fcp_resp_rsp_info *fcp_rsp_info;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dbf->scsi_lock, flags);
|
|
memset(rec, 0, sizeof(*rec));
|
|
|
|
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
|
|
rec->id = ZFCP_DBF_SCSI_CMND;
|
|
if (sc) {
|
|
rec->scsi_result = sc->result;
|
|
rec->scsi_retries = sc->retries;
|
|
rec->scsi_allowed = sc->allowed;
|
|
rec->scsi_id = sc->device->id;
|
|
rec->scsi_lun = (u32)sc->device->lun;
|
|
rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32);
|
|
rec->host_scribble = (unsigned long)sc->host_scribble;
|
|
|
|
memcpy(rec->scsi_opcode, sc->cmnd,
|
|
min_t(int, sc->cmd_len, ZFCP_DBF_SCSI_OPCODE));
|
|
} else {
|
|
rec->scsi_result = ~0;
|
|
rec->scsi_retries = ~0;
|
|
rec->scsi_allowed = ~0;
|
|
rec->scsi_id = sdev->id;
|
|
rec->scsi_lun = (u32)sdev->lun;
|
|
rec->scsi_lun_64_hi = (u32)(sdev->lun >> 32);
|
|
rec->host_scribble = ~0;
|
|
|
|
memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);
|
|
}
|
|
|
|
if (fsf) {
|
|
rec->fsf_req_id = fsf->req_id;
|
|
rec->pl_len = FCP_RESP_WITH_EXT;
|
|
fcp_rsp = &(fsf->qtcb->bottom.io.fcp_rsp.iu);
|
|
/* mandatory parts of FCP_RSP IU in this SCSI record */
|
|
memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT);
|
|
if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) {
|
|
fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
|
|
rec->fcp_rsp_info = fcp_rsp_info->rsp_code;
|
|
rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len);
|
|
}
|
|
if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
|
|
rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len);
|
|
}
|
|
/* complete FCP_RSP IU in associated PAYload record
|
|
* but only if there are optional parts
|
|
*/
|
|
if (fcp_rsp->resp.fr_flags != 0)
|
|
zfcp_dbf_pl_write(
|
|
dbf, fcp_rsp,
|
|
/* at least one full PAY record
|
|
* but not beyond hardware response field
|
|
*/
|
|
min_t(u16, max_t(u16, rec->pl_len,
|
|
ZFCP_DBF_PAY_MAX_REC),
|
|
FSF_FCP_RSP_SIZE),
|
|
"fcp_riu", fsf->req_id);
|
|
}
|
|
|
|
debug_event(dbf->scsi, level, rec, sizeof(*rec));
|
|
spin_unlock_irqrestore(&dbf->scsi_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* zfcp_dbf_scsi_eh() - Trace event for special cases of scsi_eh callbacks.
|
|
* @tag: Identifier for event.
|
|
* @adapter: Pointer to zfcp adapter as context for this event.
|
|
* @scsi_id: SCSI ID/target to indicate scope of task management function (TMF).
|
|
* @ret: Return value of calling function.
|
|
*
|
|
* This SCSI trace variant does not depend on any of:
|
|
* scsi_cmnd, zfcp_fsf_req, scsi_device.
|
|
*/
|
|
void zfcp_dbf_scsi_eh(char *tag, struct zfcp_adapter *adapter,
|
|
unsigned int scsi_id, int ret)
|
|
{
|
|
struct zfcp_dbf *dbf = adapter->dbf;
|
|
struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
|
|
unsigned long flags;
|
|
static int const level = 1;
|
|
|
|
if (unlikely(!debug_level_enabled(adapter->dbf->scsi, level)))
|
|
return;
|
|
|
|
spin_lock_irqsave(&dbf->scsi_lock, flags);
|
|
memset(rec, 0, sizeof(*rec));
|
|
|
|
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
|
|
rec->id = ZFCP_DBF_SCSI_CMND;
|
|
rec->scsi_result = ret; /* re-use field, int is 4 bytes and fits */
|
|
rec->scsi_retries = ~0;
|
|
rec->scsi_allowed = ~0;
|
|
rec->fcp_rsp_info = ~0;
|
|
rec->scsi_id = scsi_id;
|
|
rec->scsi_lun = (u32)ZFCP_DBF_INVALID_LUN;
|
|
rec->scsi_lun_64_hi = (u32)(ZFCP_DBF_INVALID_LUN >> 32);
|
|
rec->host_scribble = ~0;
|
|
memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);
|
|
|
|
debug_event(dbf->scsi, level, rec, sizeof(*rec));
|
|
spin_unlock_irqrestore(&dbf->scsi_lock, flags);
|
|
}
|
|
|
|
static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size)
|
|
{
|
|
struct debug_info *d;
|
|
|
|
d = debug_register(name, size, 1, rec_size);
|
|
if (!d)
|
|
return NULL;
|
|
|
|
debug_register_view(d, &debug_hex_ascii_view);
|
|
debug_set_level(d, dbflevel);
|
|
|
|
return d;
|
|
}
|
|
|
|
static void zfcp_dbf_unregister(struct zfcp_dbf *dbf)
|
|
{
|
|
if (!dbf)
|
|
return;
|
|
|
|
debug_unregister(dbf->scsi);
|
|
debug_unregister(dbf->san);
|
|
debug_unregister(dbf->hba);
|
|
debug_unregister(dbf->pay);
|
|
debug_unregister(dbf->rec);
|
|
kfree(dbf);
|
|
}
|
|
|
|
/**
|
|
* zfcp_adapter_debug_register - registers debug feature for an adapter
|
|
* @adapter: pointer to adapter for which debug features should be registered
|
|
* return: -ENOMEM on error, 0 otherwise
|
|
*/
|
|
int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
|
|
{
|
|
char name[DEBUG_MAX_NAME_LEN];
|
|
struct zfcp_dbf *dbf;
|
|
|
|
dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
|
|
if (!dbf)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&dbf->pay_lock);
|
|
spin_lock_init(&dbf->hba_lock);
|
|
spin_lock_init(&dbf->san_lock);
|
|
spin_lock_init(&dbf->scsi_lock);
|
|
spin_lock_init(&dbf->rec_lock);
|
|
|
|
/* debug feature area which records recovery activity */
|
|
sprintf(name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
|
|
dbf->rec = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_rec));
|
|
if (!dbf->rec)
|
|
goto err_out;
|
|
|
|
/* debug feature area which records HBA (FSF and QDIO) conditions */
|
|
sprintf(name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
|
|
dbf->hba = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_hba));
|
|
if (!dbf->hba)
|
|
goto err_out;
|
|
|
|
/* debug feature area which records payload info */
|
|
sprintf(name, "zfcp_%s_pay", dev_name(&adapter->ccw_device->dev));
|
|
dbf->pay = zfcp_dbf_reg(name, dbfsize * 2, sizeof(struct zfcp_dbf_pay));
|
|
if (!dbf->pay)
|
|
goto err_out;
|
|
|
|
/* debug feature area which records SAN command failures and recovery */
|
|
sprintf(name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
|
|
dbf->san = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_san));
|
|
if (!dbf->san)
|
|
goto err_out;
|
|
|
|
/* debug feature area which records SCSI command failures and recovery */
|
|
sprintf(name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
|
|
dbf->scsi = zfcp_dbf_reg(name, dbfsize, sizeof(struct zfcp_dbf_scsi));
|
|
if (!dbf->scsi)
|
|
goto err_out;
|
|
|
|
adapter->dbf = dbf;
|
|
|
|
return 0;
|
|
err_out:
|
|
zfcp_dbf_unregister(dbf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
|
|
* @adapter: pointer to adapter for which debug features should be unregistered
|
|
*/
|
|
void zfcp_dbf_adapter_unregister(struct zfcp_adapter *adapter)
|
|
{
|
|
struct zfcp_dbf *dbf = adapter->dbf;
|
|
|
|
adapter->dbf = NULL;
|
|
zfcp_dbf_unregister(dbf);
|
|
}
|
|
|