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linux/drivers/s390/scsi/zfcp_dbf.c
Maxim Shchetynin ed829ad607 [SCSI] zfcp: fix logging during device reset 
Avoid access to old fsf_requests if device reset is logged.

Signed-off-by: Maxim Shchetynin <maxim@de.ibm.com>
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-02-12 11:12:20 -06:00

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/*
*
* linux/drivers/s390/scsi/zfcp_dbf.c
*
* FCP adapter driver for IBM eServer zSeries
*
* Debugging facilities
*
* (C) Copyright IBM Corp. 2005
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <asm/debug.h>
#include <linux/ctype.h>
#include "zfcp_ext.h"
static u32 dbfsize = 4;
module_param(dbfsize, uint, 0400);
MODULE_PARM_DESC(dbfsize,
"number of pages for each debug feature area (default 4)");
#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
static inline int
zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
{
unsigned long long sec;
struct timespec xtime;
int len = 0;
stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
sec = stck >> 12;
do_div(sec, 1000000);
xtime.tv_sec = sec;
stck -= (sec * 1000000) << 12;
xtime.tv_nsec = ((stck * 1000) >> 12);
len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
label, xtime.tv_sec, xtime.tv_nsec);
return len;
}
static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
{
int len = 0, i;
len += sprintf(out_buf + len, "%-24s", label);
for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
len += sprintf(out_buf + len, "%c", tag[i]);
len += sprintf(out_buf + len, "\n");
return len;
}
static int
zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
{
va_list arg;
int len = 0;
len += sprintf(out_buf + len, "%-24s", label);
va_start(arg, format);
len += vsprintf(out_buf + len, format, arg);
va_end(arg);
len += sprintf(out_buf + len, "\n");
return len;
}
static int
zfcp_dbf_view_dump(char *out_buf, const char *label,
char *buffer, int buflen, int offset, int total_size)
{
int len = 0;
if (offset == 0)
len += sprintf(out_buf + len, "%-24s ", label);
while (buflen--) {
if (offset > 0) {
if ((offset % 32) == 0)
len += sprintf(out_buf + len, "\n%-24c ", ' ');
else if ((offset % 4) == 0)
len += sprintf(out_buf + len, " ");
}
len += sprintf(out_buf + len, "%02x", *buffer++);
if (++offset == total_size) {
len += sprintf(out_buf + len, "\n");
break;
}
}
if (total_size == 0)
len += sprintf(out_buf + len, "\n");
return len;
}
static inline int
zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
debug_entry_t * entry, char *out_buf)
{
struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
int len = 0;
if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
len += zfcp_dbf_stck(out_buf + len, "timestamp",
entry->id.stck);
len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
entry->id.fields.cpuid);
} else {
len += zfcp_dbf_view_dump(out_buf + len, NULL,
dump->data,
dump->size,
dump->offset, dump->total_size);
if ((dump->offset + dump->size) == dump->total_size)
len += sprintf(out_buf + len, "\n");
}
return len;
}
inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_qtcb *qtcb = fsf_req->qtcb;
union fsf_prot_status_qual *prot_status_qual =
&qtcb->prefix.prot_status_qual;
union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
struct scsi_cmnd *scsi_cmnd;
struct zfcp_port *port;
struct zfcp_unit *unit;
struct zfcp_send_els *send_els;
struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
struct zfcp_hba_dbf_record_response *response = &rec->type.response;
int level;
unsigned long flags;
spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
(qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
level = 1;
} else if (qtcb->header.fsf_status != FSF_GOOD) {
strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
level = 1;
} else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
(fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
level = 4;
} else if ((prot_status_qual->doubleword[0] != 0) ||
(prot_status_qual->doubleword[1] != 0) ||
(fsf_status_qual->doubleword[0] != 0) ||
(fsf_status_qual->doubleword[1] != 0)) {
strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE);
level = 3;
} else {
strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
level = 6;
}
response->fsf_command = fsf_req->fsf_command;
response->fsf_reqid = (unsigned long)fsf_req;
response->fsf_seqno = fsf_req->seq_no;
response->fsf_issued = fsf_req->issued;
response->fsf_prot_status = qtcb->prefix.prot_status;
response->fsf_status = qtcb->header.fsf_status;
memcpy(response->fsf_prot_status_qual,
prot_status_qual, FSF_PROT_STATUS_QUAL_SIZE);
memcpy(response->fsf_status_qual,
fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
response->fsf_req_status = fsf_req->status;
response->sbal_first = fsf_req->sbal_first;
response->sbal_curr = fsf_req->sbal_curr;
response->sbal_last = fsf_req->sbal_last;
response->pool = fsf_req->pool != NULL;
response->erp_action = (unsigned long)fsf_req->erp_action;
switch (fsf_req->fsf_command) {
case FSF_QTCB_FCP_CMND:
if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
break;
scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
if (scsi_cmnd != NULL) {
response->data.send_fcp.scsi_cmnd
= (unsigned long)scsi_cmnd;
response->data.send_fcp.scsi_serial
= scsi_cmnd->serial_number;
}
break;
case FSF_QTCB_OPEN_PORT_WITH_DID:
case FSF_QTCB_CLOSE_PORT:
case FSF_QTCB_CLOSE_PHYSICAL_PORT:
port = (struct zfcp_port *)fsf_req->data;
response->data.port.wwpn = port->wwpn;
response->data.port.d_id = port->d_id;
response->data.port.port_handle = qtcb->header.port_handle;
break;
case FSF_QTCB_OPEN_LUN:
case FSF_QTCB_CLOSE_LUN:
unit = (struct zfcp_unit *)fsf_req->data;
port = unit->port;
response->data.unit.wwpn = port->wwpn;
response->data.unit.fcp_lun = unit->fcp_lun;
response->data.unit.port_handle = qtcb->header.port_handle;
response->data.unit.lun_handle = qtcb->header.lun_handle;
break;
case FSF_QTCB_SEND_ELS:
send_els = (struct zfcp_send_els *)fsf_req->data;
response->data.send_els.d_id = qtcb->bottom.support.d_id;
response->data.send_els.ls_code = send_els->ls_code >> 24;
break;
case FSF_QTCB_ABORT_FCP_CMND:
case FSF_QTCB_SEND_GENERIC:
case FSF_QTCB_EXCHANGE_CONFIG_DATA:
case FSF_QTCB_EXCHANGE_PORT_DATA:
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
case FSF_QTCB_UPLOAD_CONTROL_FILE:
break;
}
debug_event(adapter->hba_dbf, level,
rec, sizeof(struct zfcp_hba_dbf_record));
spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
}
inline void
zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
struct fsf_status_read_buffer *status_buffer)
{
struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
unsigned long flags;
spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
rec->type.status.failed = adapter->status_read_failed;
if (status_buffer != NULL) {
rec->type.status.status_type = status_buffer->status_type;
rec->type.status.status_subtype = status_buffer->status_subtype;
memcpy(&rec->type.status.queue_designator,
&status_buffer->queue_designator,
sizeof(struct fsf_queue_designator));
switch (status_buffer->status_type) {
case FSF_STATUS_READ_SENSE_DATA_AVAIL:
rec->type.status.payload_size =
ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
break;
case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
rec->type.status.payload_size =
ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
break;
case FSF_STATUS_READ_LINK_DOWN:
switch (status_buffer->status_subtype) {
case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
case FSF_STATUS_READ_SUB_FDISC_FAILED:
rec->type.status.payload_size =
sizeof(struct fsf_link_down_info);
}
break;
case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
rec->type.status.payload_size =
ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
break;
}
memcpy(&rec->type.status.payload,
&status_buffer->payload, rec->type.status.payload_size);
}
debug_event(adapter->hba_dbf, 2,
rec, sizeof(struct zfcp_hba_dbf_record));
spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
}
inline void
zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
unsigned int qdio_error, unsigned int siga_error,
int sbal_index, int sbal_count)
{
struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
unsigned long flags;
spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
rec->type.qdio.status = status;
rec->type.qdio.qdio_error = qdio_error;
rec->type.qdio.siga_error = siga_error;
rec->type.qdio.sbal_index = sbal_index;
rec->type.qdio.sbal_count = sbal_count;
debug_event(adapter->hba_dbf, 0,
rec, sizeof(struct zfcp_hba_dbf_record));
spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
}
static inline int
zfcp_hba_dbf_view_response(char *out_buf,
struct zfcp_hba_dbf_record_response *rec)
{
int len = 0;
len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
rec->fsf_command);
len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
rec->fsf_reqid);
len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
rec->fsf_seqno);
len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
rec->fsf_prot_status);
len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
rec->fsf_status);
len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
rec->fsf_prot_status_qual,
FSF_PROT_STATUS_QUAL_SIZE,
0, FSF_PROT_STATUS_QUAL_SIZE);
len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
rec->fsf_status_qual,
FSF_STATUS_QUALIFIER_SIZE,
0, FSF_STATUS_QUALIFIER_SIZE);
len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
rec->fsf_req_status);
len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
rec->sbal_first);
len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
rec->sbal_curr);
len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
rec->sbal_last);
len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
switch (rec->fsf_command) {
case FSF_QTCB_FCP_CMND:
if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
break;
len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
rec->data.send_fcp.scsi_cmnd);
len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
rec->data.send_fcp.scsi_serial);
break;
case FSF_QTCB_OPEN_PORT_WITH_DID:
case FSF_QTCB_CLOSE_PORT:
case FSF_QTCB_CLOSE_PHYSICAL_PORT:
len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
rec->data.port.wwpn);
len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
rec->data.port.d_id);
len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
rec->data.port.port_handle);
break;
case FSF_QTCB_OPEN_LUN:
case FSF_QTCB_CLOSE_LUN:
len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
rec->data.unit.wwpn);
len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
rec->data.unit.fcp_lun);
len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
rec->data.unit.port_handle);
len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
rec->data.unit.lun_handle);
break;
case FSF_QTCB_SEND_ELS:
len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
rec->data.send_els.d_id);
len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
rec->data.send_els.ls_code);
break;
case FSF_QTCB_ABORT_FCP_CMND:
case FSF_QTCB_SEND_GENERIC:
case FSF_QTCB_EXCHANGE_CONFIG_DATA:
case FSF_QTCB_EXCHANGE_PORT_DATA:
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
case FSF_QTCB_UPLOAD_CONTROL_FILE:
break;
}
return len;
}
static inline int
zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
{
int len = 0;
len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
rec->status_type);
len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
rec->status_subtype);
len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
(char *)&rec->queue_designator,
sizeof(struct fsf_queue_designator),
0, sizeof(struct fsf_queue_designator));
len += zfcp_dbf_view_dump(out_buf + len, "payload",
(char *)&rec->payload,
rec->payload_size, 0, rec->payload_size);
return len;
}
static inline int
zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
{
int len = 0;
len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
rec->qdio_error);
len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
rec->siga_error);
len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
rec->sbal_index);
len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
rec->sbal_count);
return len;
}
static int
zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
int len = 0;
if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
return 0;
len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
if (isalpha(rec->tag2[0]))
len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
len += zfcp_hba_dbf_view_response(out_buf + len,
&rec->type.response);
else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
len += zfcp_hba_dbf_view_status(out_buf + len,
&rec->type.status);
else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
len += sprintf(out_buf + len, "\n");
return len;
}
struct debug_view zfcp_hba_dbf_view = {
"structured",
NULL,
&zfcp_dbf_view_header,
&zfcp_hba_dbf_view_format,
NULL,
NULL
};
inline void
_zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
u32 s_id, u32 d_id, void *buffer, int buflen)
{
struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
struct zfcp_port *port = send_ct->port;
struct zfcp_adapter *adapter = port->adapter;
struct ct_hdr *header = (struct ct_hdr *)buffer;
struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
unsigned long flags;
spin_lock_irqsave(&adapter->san_dbf_lock, flags);
memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
rec->fsf_reqid = (unsigned long)fsf_req;
rec->fsf_seqno = fsf_req->seq_no;
rec->s_id = s_id;
rec->d_id = d_id;
if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
ct->type.request.cmd_req_code = header->cmd_rsp_code;
ct->type.request.revision = header->revision;
ct->type.request.gs_type = header->gs_type;
ct->type.request.gs_subtype = header->gs_subtype;
ct->type.request.options = header->options;
ct->type.request.max_res_size = header->max_res_size;
} else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
ct->type.response.revision = header->revision;
ct->type.response.reason_code = header->reason_code;
ct->type.response.reason_code_expl = header->reason_code_expl;
ct->type.response.vendor_unique = header->vendor_unique;
}
ct->payload_size =
min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
debug_event(adapter->san_dbf, 3,
rec, sizeof(struct zfcp_san_dbf_record));
spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
}
inline void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
struct zfcp_port *port = ct->port;
struct zfcp_adapter *adapter = port->adapter;
_zfcp_san_dbf_event_common_ct("octc", fsf_req,
fc_host_port_id(adapter->scsi_host),
port->d_id, zfcp_sg_to_address(ct->req),
ct->req->length);
}
inline void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
struct zfcp_port *port = ct->port;
struct zfcp_adapter *adapter = port->adapter;
_zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
fc_host_port_id(adapter->scsi_host),
zfcp_sg_to_address(ct->resp),
ct->resp->length);
}
static inline void
_zfcp_san_dbf_event_common_els(const char *tag, int level,
struct zfcp_fsf_req *fsf_req, u32 s_id,
u32 d_id, u8 ls_code, void *buffer, int buflen)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
unsigned long flags;
int offset = 0;
spin_lock_irqsave(&adapter->san_dbf_lock, flags);
do {
memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
if (offset == 0) {
strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
rec->fsf_reqid = (unsigned long)fsf_req;
rec->fsf_seqno = fsf_req->seq_no;
rec->s_id = s_id;
rec->d_id = d_id;
rec->type.els.ls_code = ls_code;
buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
rec->type.els.payload_size = buflen;
memcpy(rec->type.els.payload,
buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
} else {
strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
dump->total_size = buflen;
dump->offset = offset;
dump->size = min(buflen - offset,
(int)sizeof(struct zfcp_san_dbf_record)
- (int)sizeof(struct zfcp_dbf_dump));
memcpy(dump->data, buffer + offset, dump->size);
offset += dump->size;
}
debug_event(adapter->san_dbf, level,
rec, sizeof(struct zfcp_san_dbf_record));
} while (offset < buflen);
spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
}
inline void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
_zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
fc_host_port_id(els->adapter->scsi_host),
els->d_id,
*(u8 *) zfcp_sg_to_address(els->req),
zfcp_sg_to_address(els->req),
els->req->length);
}
inline void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
_zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
fc_host_port_id(els->adapter->scsi_host),
*(u8 *) zfcp_sg_to_address(els->req),
zfcp_sg_to_address(els->resp),
els->resp->length);
}
inline void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *)fsf_req->data;
int length = (int)status_buffer->length -
(int)((void *)&status_buffer->payload - (void *)status_buffer);
_zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
fc_host_port_id(adapter->scsi_host),
*(u8 *) status_buffer->payload,
(void *)status_buffer->payload, length);
}
static int
zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
char *buffer = NULL;
int buflen = 0, total = 0;
int len = 0;
if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
return 0;
len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
rec->fsf_reqid);
len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
rec->fsf_seqno);
len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
rec->type.ct.type.request.cmd_req_code);
len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
rec->type.ct.type.request.revision);
len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
rec->type.ct.type.request.gs_type);
len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
rec->type.ct.type.request.gs_subtype);
len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
rec->type.ct.type.request.options);
len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
rec->type.ct.type.request.max_res_size);
total = rec->type.ct.payload_size;
buffer = rec->type.ct.payload;
buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
} else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
rec->type.ct.type.response.cmd_rsp_code);
len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
rec->type.ct.type.response.revision);
len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
rec->type.ct.type.response.reason_code);
len +=
zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
rec->type.ct.type.response.reason_code_expl);
len +=
zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
rec->type.ct.type.response.vendor_unique);
total = rec->type.ct.payload_size;
buffer = rec->type.ct.payload;
buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
} else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
rec->type.els.ls_code);
total = rec->type.els.payload_size;
buffer = rec->type.els.payload;
buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
}
len += zfcp_dbf_view_dump(out_buf + len, "payload",
buffer, buflen, 0, total);
if (buflen == total)
len += sprintf(out_buf + len, "\n");
return len;
}
struct debug_view zfcp_san_dbf_view = {
"structured",
NULL,
&zfcp_dbf_view_header,
&zfcp_san_dbf_view_format,
NULL,
NULL
};
static inline void
_zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
struct zfcp_adapter *adapter,
struct scsi_cmnd *scsi_cmnd,
struct zfcp_fsf_req *fsf_req,
struct zfcp_fsf_req *old_fsf_req)
{
struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
unsigned long flags;
struct fcp_rsp_iu *fcp_rsp;
char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
int offset = 0, buflen = 0;
spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
do {
memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
if (offset == 0) {
strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
if (scsi_cmnd != NULL) {
if (scsi_cmnd->device) {
rec->scsi_id = scsi_cmnd->device->id;
rec->scsi_lun = scsi_cmnd->device->lun;
}
rec->scsi_result = scsi_cmnd->result;
rec->scsi_cmnd = (unsigned long)scsi_cmnd;
rec->scsi_serial = scsi_cmnd->serial_number;
memcpy(rec->scsi_opcode, &scsi_cmnd->cmnd,
min((int)scsi_cmnd->cmd_len,
ZFCP_DBF_SCSI_OPCODE));
rec->scsi_retries = scsi_cmnd->retries;
rec->scsi_allowed = scsi_cmnd->allowed;
}
if (fsf_req != NULL) {
fcp_rsp = (struct fcp_rsp_iu *)
&(fsf_req->qtcb->bottom.io.fcp_rsp);
fcp_rsp_info =
zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
fcp_sns_info =
zfcp_get_fcp_sns_info_ptr(fcp_rsp);
rec->type.fcp.rsp_validity =
fcp_rsp->validity.value;
rec->type.fcp.rsp_scsi_status =
fcp_rsp->scsi_status;
rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
rec->type.fcp.rsp_code =
*(fcp_rsp_info + 3);
if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
buflen = min((int)fcp_rsp->fcp_sns_len,
ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
rec->type.fcp.sns_info_len = buflen;
memcpy(rec->type.fcp.sns_info,
fcp_sns_info,
min(buflen,
ZFCP_DBF_SCSI_FCP_SNS_INFO));
offset += min(buflen,
ZFCP_DBF_SCSI_FCP_SNS_INFO);
}
rec->fsf_reqid = (unsigned long)fsf_req;
rec->fsf_seqno = fsf_req->seq_no;
rec->fsf_issued = fsf_req->issued;
}
rec->type.old_fsf_reqid =
(unsigned long) old_fsf_req;
} else {
strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
dump->total_size = buflen;
dump->offset = offset;
dump->size = min(buflen - offset,
(int)sizeof(struct
zfcp_scsi_dbf_record) -
(int)sizeof(struct zfcp_dbf_dump));
memcpy(dump->data, fcp_sns_info + offset, dump->size);
offset += dump->size;
}
debug_event(adapter->scsi_dbf, level,
rec, sizeof(struct zfcp_scsi_dbf_record));
} while (offset < buflen);
spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
}
inline void
zfcp_scsi_dbf_event_result(const char *tag, int level,
struct zfcp_adapter *adapter,
struct scsi_cmnd *scsi_cmnd,
struct zfcp_fsf_req *fsf_req)
{
_zfcp_scsi_dbf_event_common("rslt", tag, level,
adapter, scsi_cmnd, fsf_req, NULL);
}
inline void
zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
struct scsi_cmnd *scsi_cmnd,
struct zfcp_fsf_req *new_fsf_req,
struct zfcp_fsf_req *old_fsf_req)
{
_zfcp_scsi_dbf_event_common("abrt", tag, 1,
adapter, scsi_cmnd, new_fsf_req, old_fsf_req);
}
inline void
zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
struct scsi_cmnd *scsi_cmnd)
{
struct zfcp_adapter *adapter = unit->port->adapter;
_zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
tag, 1, adapter, scsi_cmnd, NULL, NULL);
}
static int
zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
struct zfcp_scsi_dbf_record *rec =
(struct zfcp_scsi_dbf_record *)in_buf;
int len = 0;
if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
return 0;
len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
rec->scsi_lun);
len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
rec->scsi_result);
len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
rec->scsi_cmnd);
len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
rec->scsi_serial);
len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
rec->scsi_opcode,
ZFCP_DBF_SCSI_OPCODE,
0, ZFCP_DBF_SCSI_OPCODE);
len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
rec->scsi_retries);
len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
rec->scsi_allowed);
if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
len += zfcp_dbf_view(out_buf + len, "old_fsf_reqid", "0x%0Lx",
rec->type.old_fsf_reqid);
}
len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
rec->fsf_reqid);
len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
rec->fsf_seqno);
len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
len +=
zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
rec->type.fcp.rsp_validity);
len +=
zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
"0x%02x", rec->type.fcp.rsp_scsi_status);
len +=
zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
rec->type.fcp.rsp_resid);
len +=
zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
rec->type.fcp.rsp_code);
len +=
zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
rec->type.fcp.sns_info_len);
len +=
zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
rec->type.fcp.sns_info,
min((int)rec->type.fcp.sns_info_len,
ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
rec->type.fcp.sns_info_len);
}
len += sprintf(out_buf + len, "\n");
return len;
}
struct debug_view zfcp_scsi_dbf_view = {
"structured",
NULL,
&zfcp_dbf_view_header,
&zfcp_scsi_dbf_view_format,
NULL,
NULL
};
/**
* 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_adapter_debug_register(struct zfcp_adapter *adapter)
{
char dbf_name[DEBUG_MAX_NAME_LEN];
/* debug feature area which records recovery activity */
sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
sizeof(struct zfcp_erp_dbf_record));
if (!adapter->erp_dbf)
goto failed;
debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
debug_set_level(adapter->erp_dbf, 3);
/* debug feature area which records HBA (FSF and QDIO) conditions */
sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_hba_dbf_record));
if (!adapter->hba_dbf)
goto failed;
debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
debug_set_level(adapter->hba_dbf, 3);
/* debug feature area which records SAN command failures and recovery */
sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_san_dbf_record));
if (!adapter->san_dbf)
goto failed;
debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
debug_set_level(adapter->san_dbf, 6);
/* debug feature area which records SCSI command failures and recovery */
sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_scsi_dbf_record));
if (!adapter->scsi_dbf)
goto failed;
debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
debug_set_level(adapter->scsi_dbf, 3);
return 0;
failed:
zfcp_adapter_debug_unregister(adapter);
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_adapter_debug_unregister(struct zfcp_adapter *adapter)
{
debug_unregister(adapter->scsi_dbf);
debug_unregister(adapter->san_dbf);
debug_unregister(adapter->hba_dbf);
debug_unregister(adapter->erp_dbf);
adapter->scsi_dbf = NULL;
adapter->san_dbf = NULL;
adapter->hba_dbf = NULL;
adapter->erp_dbf = NULL;
}
#undef ZFCP_LOG_AREA
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