mirror of https://gitee.com/openkylin/linux.git
538 lines
15 KiB
C
538 lines
15 KiB
C
/*
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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, 2010
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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 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 unsolicited status has been received
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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, 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 = req->fsf_command;
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rec->fsf_seq_no = 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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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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if (req->fsf_command != FSF_QTCB_FCP_CMND) {
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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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}
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debug_event(dbf->hba, 1, 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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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_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 = req->fsf_command;
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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, 2, 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 unsolicited status has been 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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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_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 = req->fsf_command;
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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, 1, 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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u16 length;
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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, 1, 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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* @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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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_BASIC;
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debug_event(dbf->hba, 1, 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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}
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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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struct list_head *entry;
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unsigned long flags;
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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, 1, 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_run - trace event related to running recovery
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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(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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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->action;
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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);
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else if (erp->port)
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rec->u.run.rec_count = atomic_read(&erp->port->erp_counter);
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else
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rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter);
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debug_event(dbf->rec, 1, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->rec_lock, flags);
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}
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static inline
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void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf, void *data, u8 id, u16 len,
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u64 req_id, u32 d_id)
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{
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struct zfcp_dbf_san *rec = &dbf->san_buf;
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u16 rec_len;
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unsigned long flags;
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spin_lock_irqsave(&dbf->san_lock, flags);
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memset(rec, 0, sizeof(*rec));
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rec->id = id;
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rec->fsf_req_id = req_id;
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rec->d_id = d_id;
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rec_len = min(len, (u16)ZFCP_DBF_SAN_MAX_PAYLOAD);
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memcpy(rec->payload, data, rec_len);
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memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
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debug_event(dbf->san, 1, rec, sizeof(*rec));
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spin_unlock_irqrestore(&dbf->san_lock, flags);
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}
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/**
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* zfcp_dbf_san_req - trace event for issued SAN request
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* @tag: indentifier for event
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* @fsf_req: request containing issued CT data
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* d_id: destination ID
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*/
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void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id)
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{
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struct zfcp_dbf *dbf = fsf->adapter->dbf;
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struct zfcp_fsf_ct_els *ct_els = fsf->data;
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u16 length;
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length = (u16)(ct_els->req->length + FC_CT_HDR_LEN);
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zfcp_dbf_san(tag, dbf, sg_virt(ct_els->req), ZFCP_DBF_SAN_REQ, length,
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fsf->req_id, d_id);
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}
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/**
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* zfcp_dbf_san_res - trace event for received SAN request
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* @tag: indentifier for event
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* @fsf_req: request containing issued CT data
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*/
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void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf)
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{
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struct zfcp_dbf *dbf = fsf->adapter->dbf;
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struct zfcp_fsf_ct_els *ct_els = fsf->data;
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u16 length;
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length = (u16)(ct_els->resp->length + FC_CT_HDR_LEN);
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zfcp_dbf_san(tag, dbf, sg_virt(ct_els->resp), ZFCP_DBF_SAN_RES, length,
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fsf->req_id, 0);
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}
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/**
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* zfcp_dbf_san_in_els - trace event for incoming ELS
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* @tag: indentifier for event
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* @fsf_req: request containing issued CT data
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*/
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void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf)
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{
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struct zfcp_dbf *dbf = fsf->adapter->dbf;
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struct fsf_status_read_buffer *srb =
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(struct fsf_status_read_buffer *) fsf->data;
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u16 length;
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length = (u16)(srb->length -
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offsetof(struct fsf_status_read_buffer, payload));
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zfcp_dbf_san(tag, dbf, srb->payload.data, ZFCP_DBF_SAN_ELS, length,
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fsf->req_id, ntoh24(srb->d_id));
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}
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/**
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* zfcp_dbf_scsi - trace event for scsi commands
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* @tag: identifier for event
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* @sc: pointer to struct scsi_cmnd
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* @fsf: pointer to struct zfcp_fsf_req
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*/
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void zfcp_dbf_scsi(char *tag, struct scsi_cmnd *sc, struct zfcp_fsf_req *fsf)
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{
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struct zfcp_adapter *adapter =
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(struct zfcp_adapter *) sc->device->host->hostdata[0];
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struct zfcp_dbf *dbf = adapter->dbf;
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struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
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struct fcp_resp_with_ext *fcp_rsp;
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struct fcp_resp_rsp_info *fcp_rsp_info;
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unsigned long flags;
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spin_lock_irqsave(&dbf->scsi_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_SCSI_CMND;
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rec->scsi_result = sc->result;
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rec->scsi_retries = sc->retries;
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rec->scsi_allowed = sc->allowed;
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rec->scsi_id = sc->device->id;
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rec->scsi_lun = sc->device->lun;
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rec->host_scribble = (unsigned long)sc->host_scribble;
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memcpy(rec->scsi_opcode, sc->cmnd,
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min((int)sc->cmd_len, ZFCP_DBF_SCSI_OPCODE));
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if (fsf) {
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rec->fsf_req_id = fsf->req_id;
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fcp_rsp = (struct fcp_resp_with_ext *)
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&(fsf->qtcb->bottom.io.fcp_rsp);
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memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT);
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if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) {
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fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
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rec->fcp_rsp_info = fcp_rsp_info->rsp_code;
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}
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if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
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rec->pl_len = min((u16)SCSI_SENSE_BUFFERSIZE,
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(u16)ZFCP_DBF_PAY_MAX_REC);
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zfcp_dbf_pl_write(dbf, sc->sense_buffer, rec->pl_len,
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"fcp_sns", fsf->req_id);
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}
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}
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debug_event(dbf->scsi, 1, rec, sizeof(*rec));
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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, 3);
|
|
|
|
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);
|
|
}
|
|
|