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linux/drivers/s390/scsi/zfcp_dbf.c
Christof Schmitt bf5eefb007 [SCSI] zfcp: Remove scsi_cmnd->serial_number from debug traces 
With the change that drivers have to explicitly request the serial
number for SCSI commands, this field should not be part of the zfcp
traces. It is not worth the effort to request the serial number only
for tracing purposes, so simply remove this field from the debug
traces.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-10-07 17:25:26 -05:00

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35 KiB
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/*
* zfcp device driver
*
* Debug traces for zfcp.
*
* Copyright IBM Corporation 2002, 2009
*/
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/ctype.h>
#include <linux/slab.h>
#include <asm/debug.h>
#include "zfcp_dbf.h"
#include "zfcp_ext.h"
#include "zfcp_fc.h"
static u32 dbfsize = 4;
module_param(dbfsize, uint, 0400);
MODULE_PARM_DESC(dbfsize,
"number of pages for each debug feature area (default 4)");
static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
int level, char *from, int from_len)
{
int offset;
struct zfcp_dbf_dump *dump = to;
int room = to_len - sizeof(*dump);
for (offset = 0; offset < from_len; offset += dump->size) {
memset(to, 0, to_len);
strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
dump->total_size = from_len;
dump->offset = offset;
dump->size = min(from_len - offset, room);
memcpy(dump->data, from + offset, dump->size);
debug_event(dbf, level, dump, dump->size + sizeof(*dump));
}
}
static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
{
int i;
*p += sprintf(*p, "%-24s", label);
for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
*p += sprintf(*p, "%c", tag[i]);
*p += sprintf(*p, "\n");
}
static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
{
*buf += sprintf(*buf, "%-24s%s\n", s1, s2);
}
static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
{
va_list arg;
*buf += sprintf(*buf, "%-24s", s);
va_start(arg, format);
*buf += vsprintf(*buf, format, arg);
va_end(arg);
*buf += sprintf(*buf, "\n");
}
static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
int buflen, int offset, int total_size)
{
if (!offset)
*p += sprintf(*p, "%-24s ", label);
while (buflen--) {
if (offset > 0) {
if ((offset % 32) == 0)
*p += sprintf(*p, "\n%-24c ", ' ');
else if ((offset % 4) == 0)
*p += sprintf(*p, " ");
}
*p += sprintf(*p, "%02x", *buffer++);
if (++offset == total_size) {
*p += sprintf(*p, "\n");
break;
}
}
if (!total_size)
*p += sprintf(*p, "\n");
}
static 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);
struct timespec t;
char *p = out_buf;
if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
stck_to_timespec(entry->id.stck, &t);
zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
t.tv_sec, t.tv_nsec);
zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
} else {
zfcp_dbf_outd(&p, "", dump->data, dump->size, dump->offset,
dump->total_size);
if ((dump->offset + dump->size) == dump->total_size)
p += sprintf(p, "\n");
}
return p - out_buf;
}
void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
struct zfcp_fsf_req *fsf_req,
struct zfcp_dbf *dbf)
{
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_dbf_hba_record *rec = &dbf->hba_buf;
struct zfcp_dbf_hba_record_response *response = &rec->u.response;
unsigned long flags;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(rec, 0, sizeof(*rec));
strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
response->fsf_command = fsf_req->fsf_command;
response->fsf_reqid = fsf_req->req_id;
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->qdio_req.sbal_first;
response->sbal_last = fsf_req->qdio_req.sbal_last;
response->sbal_response = fsf_req->qdio_req.sbal_response;
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) {
response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
response->u.fcp.data_dir =
qtcb->bottom.io.data_direction;
}
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->u.port.wwpn = port->wwpn;
response->u.port.d_id = port->d_id;
response->u.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->u.unit.wwpn = port->wwpn;
response->u.unit.fcp_lun = unit->fcp_lun;
response->u.unit.port_handle = qtcb->header.port_handle;
response->u.unit.lun_handle = qtcb->header.lun_handle;
break;
case FSF_QTCB_SEND_ELS:
send_els = (struct zfcp_send_els *)fsf_req->data;
response->u.els.d_id = ntoh24(qtcb->bottom.support.d_id);
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(dbf->hba, level, rec, sizeof(*rec));
/* have fcp channel microcode fixed to use as little as possible */
if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
/* adjust length skipping trailing zeros */
char *buf = (char *)qtcb + qtcb->header.log_start;
int len = qtcb->header.log_length;
for (; len && !buf[len - 1]; len--);
zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
len);
}
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
struct fsf_status_read_buffer *status_buffer)
{
struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(rec, 0, sizeof(*rec));
strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
if (status_buffer != NULL) {
rec->u.status.status_type = status_buffer->status_type;
rec->u.status.status_subtype = status_buffer->status_subtype;
memcpy(&rec->u.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->u.status.payload_size =
ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
break;
case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
rec->u.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->u.status.payload_size =
sizeof(struct fsf_link_down_info);
}
break;
case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
rec->u.status.payload_size =
ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
break;
}
memcpy(&rec->u.status.payload,
&status_buffer->payload, rec->u.status.payload_size);
}
debug_event(dbf->hba, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
/**
* zfcp_dbf_hba_qdio - trace event for QDIO related failure
* @qdio: qdio structure affected by this QDIO related event
* @qdio_error: as passed by qdio module
* @sbal_index: first buffer with error condition, as passed by qdio module
* @sbal_count: number of buffers affected, as passed by qdio module
*/
void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
int sbal_index, int sbal_count)
{
struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(r, 0, sizeof(*r));
strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
r->u.qdio.qdio_error = qdio_error;
r->u.qdio.sbal_index = sbal_index;
r->u.qdio.sbal_count = sbal_count;
debug_event(dbf->hba, 0, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
/**
* zfcp_dbf_hba_berr - trace event for bit error threshold
* @dbf: dbf structure affected by this QDIO related event
* @req: fsf request
*/
void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
{
struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
struct fsf_status_read_buffer *sr_buf = req->data;
struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
unsigned long flags;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(r, 0, sizeof(*r));
strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
debug_event(dbf->hba, 0, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
static void zfcp_dbf_hba_view_response(char **p,
struct zfcp_dbf_hba_record_response *r)
{
struct timespec t;
zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
stck_to_timespec(r->fsf_issued, &t);
zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
switch (r->fsf_command) {
case FSF_QTCB_FCP_CMND:
if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
break;
zfcp_dbf_out(p, "data_direction", "0x%04x", r->u.fcp.data_dir);
zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
*p += sprintf(*p, "\n");
break;
case FSF_QTCB_OPEN_PORT_WITH_DID:
case FSF_QTCB_CLOSE_PORT:
case FSF_QTCB_CLOSE_PHYSICAL_PORT:
zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
break;
case FSF_QTCB_OPEN_LUN:
case FSF_QTCB_CLOSE_LUN:
zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
break;
case FSF_QTCB_SEND_ELS:
zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
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;
}
}
static void zfcp_dbf_hba_view_status(char **p,
struct zfcp_dbf_hba_record_status *r)
{
zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
sizeof(struct fsf_queue_designator), 0,
sizeof(struct fsf_queue_designator));
zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
r->payload_size);
}
static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
{
zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
}
static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
{
zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
zfcp_dbf_out(p, "loss_of_sig_err", "%d", r->loss_of_signal_error_count);
zfcp_dbf_out(p, "prim_seq_err", "%d",
r->primitive_sequence_error_count);
zfcp_dbf_out(p, "inval_trans_word_err", "%d",
r->invalid_transmission_word_error_count);
zfcp_dbf_out(p, "CRC_errors", "%d", r->crc_error_count);
zfcp_dbf_out(p, "prim_seq_event_to", "%d",
r->primitive_sequence_event_timeout_count);
zfcp_dbf_out(p, "elast_buf_overrun_err", "%d",
r->elastic_buffer_overrun_error_count);
zfcp_dbf_out(p, "adv_rec_buf2buf_cred", "%d",
r->advertised_receive_b2b_credit);
zfcp_dbf_out(p, "curr_rec_buf2buf_cred", "%d",
r->current_receive_b2b_credit);
zfcp_dbf_out(p, "adv_trans_buf2buf_cred", "%d",
r->advertised_transmit_b2b_credit);
zfcp_dbf_out(p, "curr_trans_buf2buf_cred", "%d",
r->current_transmit_b2b_credit);
}
static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
char *p = out_buf;
if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
return 0;
zfcp_dbf_tag(&p, "tag", r->tag);
if (isalpha(r->tag2[0]))
zfcp_dbf_tag(&p, "tag2", r->tag2);
if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
zfcp_dbf_hba_view_response(&p, &r->u.response);
else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
zfcp_dbf_hba_view_status(&p, &r->u.status);
else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
zfcp_dbf_hba_view_berr(&p, &r->u.berr);
if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
p += sprintf(p, "\n");
return p - out_buf;
}
static struct debug_view zfcp_dbf_hba_view = {
.name = "structured",
.header_proc = zfcp_dbf_view_header,
.format_proc = zfcp_dbf_hba_view_format,
};
static const char *zfcp_dbf_rec_tags[] = {
[ZFCP_REC_DBF_ID_THREAD] = "thread",
[ZFCP_REC_DBF_ID_TARGET] = "target",
[ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
[ZFCP_REC_DBF_ID_ACTION] = "action",
};
static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
char *buf, const char *_rec)
{
struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
char *p = buf;
char hint[ZFCP_DBF_ID_SIZE + 1];
memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
hint[ZFCP_DBF_ID_SIZE] = 0;
zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
zfcp_dbf_outs(&p, "hint", hint);
switch (r->id) {
case ZFCP_REC_DBF_ID_THREAD:
zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
break;
case ZFCP_REC_DBF_ID_TARGET:
zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
break;
case ZFCP_REC_DBF_ID_TRIGGER:
zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
zfcp_dbf_out(&p, "lun_status", "0x%08x", r->u.trigger.ls);
break;
case ZFCP_REC_DBF_ID_ACTION:
zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
break;
}
p += sprintf(p, "\n");
return p - buf;
}
static struct debug_view zfcp_dbf_rec_view = {
.name = "structured",
.header_proc = zfcp_dbf_view_header,
.format_proc = zfcp_dbf_rec_view_format,
};
/**
* zfcp_dbf_rec_thread - trace event related to recovery thread operation
* @id2: identifier for event
* @dbf: reference to dbf structure
* This function assumes that the caller is holding erp_lock.
*/
void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
{
struct zfcp_adapter *adapter = dbf->adapter;
struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
unsigned long flags = 0;
struct list_head *entry;
unsigned ready = 0, running = 0, total;
list_for_each(entry, &adapter->erp_ready_head)
ready++;
list_for_each(entry, &adapter->erp_running_head)
running++;
total = adapter->erp_total_count;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(r, 0, sizeof(*r));
r->id = ZFCP_REC_DBF_ID_THREAD;
memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
r->u.thread.total = total;
r->u.thread.ready = ready;
r->u.thread.running = running;
debug_event(dbf->rec, 6, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_rec_thread - trace event related to recovery thread operation
* @id2: identifier for event
* @adapter: adapter
* This function assumes that the caller does not hold erp_lock.
*/
void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
{
struct zfcp_adapter *adapter = dbf->adapter;
unsigned long flags;
read_lock_irqsave(&adapter->erp_lock, flags);
zfcp_dbf_rec_thread(id2, dbf);
read_unlock_irqrestore(&adapter->erp_lock, flags);
}
static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
atomic_t *status, atomic_t *erp_count, u64 wwpn,
u32 d_id, u64 fcp_lun)
{
struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(r, 0, sizeof(*r));
r->id = ZFCP_REC_DBF_ID_TARGET;
memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
r->u.target.ref = (unsigned long)ref;
r->u.target.status = atomic_read(status);
r->u.target.wwpn = wwpn;
r->u.target.d_id = d_id;
r->u.target.fcp_lun = fcp_lun;
r->u.target.erp_count = atomic_read(erp_count);
debug_event(dbf->rec, 3, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_rec_adapter - trace event for adapter state change
* @id: identifier for trigger of state change
* @ref: additional reference (e.g. request)
* @dbf: reference to dbf structure
*/
void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
{
struct zfcp_adapter *adapter = dbf->adapter;
zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
&adapter->erp_counter, 0, 0,
ZFCP_DBF_INVALID_LUN);
}
/**
* zfcp_dbf_rec_port - trace event for port state change
* @id: identifier for trigger of state change
* @ref: additional reference (e.g. request)
* @port: port
*/
void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
{
struct zfcp_dbf *dbf = port->adapter->dbf;
zfcp_dbf_rec_target(id, ref, dbf, &port->status,
&port->erp_counter, port->wwpn, port->d_id,
ZFCP_DBF_INVALID_LUN);
}
/**
* zfcp_dbf_rec_lun - trace event for LUN state change
* @id: identifier for trigger of state change
* @ref: additional reference (e.g. request)
* @sdev: SCSI device
*/
void zfcp_dbf_rec_lun(char *id, void *ref, struct scsi_device *sdev)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
struct zfcp_port *port = zfcp_sdev->port;
struct zfcp_dbf *dbf = port->adapter->dbf;
zfcp_dbf_rec_target(id, ref, dbf, &zfcp_sdev->status,
&zfcp_sdev->erp_counter, port->wwpn, port->d_id,
zfcp_scsi_dev_lun(sdev));
}
/**
* zfcp_dbf_rec_trigger - trace event for triggered error recovery
* @id2: identifier for error recovery trigger
* @ref: additional reference (e.g. request)
* @want: originally requested error recovery action
* @need: error recovery action actually initiated
* @action: address of error recovery action struct
* @adapter: adapter
* @port: port
* @sdev: SCSI device
*/
void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
struct zfcp_adapter *adapter, struct zfcp_port *port,
struct scsi_device *sdev)
{
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(r, 0, sizeof(*r));
r->id = ZFCP_REC_DBF_ID_TRIGGER;
memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
r->u.trigger.ref = (unsigned long)ref;
r->u.trigger.want = want;
r->u.trigger.need = need;
r->u.trigger.action = (unsigned long)action;
r->u.trigger.as = atomic_read(&adapter->status);
if (port) {
r->u.trigger.ps = atomic_read(&port->status);
r->u.trigger.wwpn = port->wwpn;
}
if (sdev)
r->u.trigger.ls = atomic_read(&sdev_to_zfcp(sdev)->status);
r->u.trigger.fcp_lun = sdev ? zfcp_scsi_dev_lun(sdev) :
ZFCP_DBF_INVALID_LUN;
debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_rec_action - trace event showing progress of recovery action
* @id2: identifier
* @erp_action: error recovery action struct pointer
*/
void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
{
struct zfcp_dbf *dbf = erp_action->adapter->dbf;
struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(r, 0, sizeof(*r));
r->id = ZFCP_REC_DBF_ID_ACTION;
memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
r->u.action.action = (unsigned long)erp_action;
r->u.action.status = erp_action->status;
r->u.action.step = erp_action->step;
r->u.action.fsf_req = erp_action->fsf_req_id;
debug_event(dbf->rec, 5, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_san_ct_request - trace event for issued CT request
* @fsf_req: request containing issued CT data
* @d_id: destination id where ct request is sent to
*/
void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req, u32 d_id)
{
struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct zfcp_dbf *dbf = adapter->dbf;
struct fc_ct_hdr *hdr = sg_virt(ct->req);
struct zfcp_dbf_san_record *r = &dbf->san_buf;
struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
int level = 3;
unsigned long flags;
spin_lock_irqsave(&dbf->san_lock, flags);
memset(r, 0, sizeof(*r));
strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
r->fsf_reqid = fsf_req->req_id;
r->fsf_seqno = fsf_req->seq_no;
oct->d_id = d_id;
oct->cmd_req_code = hdr->ct_cmd;
oct->revision = hdr->ct_rev;
oct->gs_type = hdr->ct_fs_type;
oct->gs_subtype = hdr->ct_fs_subtype;
oct->options = hdr->ct_options;
oct->max_res_size = hdr->ct_mr_size;
oct->len = min((int)ct->req->length - (int)sizeof(struct fc_ct_hdr),
ZFCP_DBF_SAN_MAX_PAYLOAD);
debug_event(dbf->san, level, r, sizeof(*r));
zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
(void *)hdr + sizeof(struct fc_ct_hdr), oct->len);
spin_unlock_irqrestore(&dbf->san_lock, flags);
}
/**
* zfcp_dbf_san_ct_response - trace event for completion of CT request
* @fsf_req: request containing CT response
*/
void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fc_ct_hdr *hdr = sg_virt(ct->resp);
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_san_record *r = &dbf->san_buf;
struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
int level = 3;
unsigned long flags;
spin_lock_irqsave(&dbf->san_lock, flags);
memset(r, 0, sizeof(*r));
strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
r->fsf_reqid = fsf_req->req_id;
r->fsf_seqno = fsf_req->seq_no;
rct->cmd_rsp_code = hdr->ct_cmd;
rct->revision = hdr->ct_rev;
rct->reason_code = hdr->ct_reason;
rct->expl = hdr->ct_explan;
rct->vendor_unique = hdr->ct_vendor;
rct->max_res_size = hdr->ct_mr_size;
rct->len = min((int)ct->resp->length - (int)sizeof(struct fc_ct_hdr),
ZFCP_DBF_SAN_MAX_PAYLOAD);
debug_event(dbf->san, level, r, sizeof(*r));
zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
(void *)hdr + sizeof(struct fc_ct_hdr), rct->len);
spin_unlock_irqrestore(&dbf->san_lock, flags);
}
static void zfcp_dbf_san_els(const char *tag, int level,
struct zfcp_fsf_req *fsf_req, u32 d_id,
void *buffer, int buflen)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_san_record *rec = &dbf->san_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->san_lock, flags);
memset(rec, 0, sizeof(*rec));
strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
rec->fsf_reqid = fsf_req->req_id;
rec->fsf_seqno = fsf_req->seq_no;
rec->u.els.d_id = d_id;
debug_event(dbf->san, level, rec, sizeof(*rec));
zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
spin_unlock_irqrestore(&dbf->san_lock, flags);
}
/**
* zfcp_dbf_san_els_request - trace event for issued ELS
* @fsf_req: request containing issued ELS
*/
void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
zfcp_dbf_san_els("oels", 2, fsf_req, d_id,
sg_virt(els->req), els->req->length);
}
/**
* zfcp_dbf_san_els_response - trace event for completed ELS
* @fsf_req: request containing ELS response
*/
void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
zfcp_dbf_san_els("rels", 2, fsf_req, d_id,
sg_virt(els->resp), els->resp->length);
}
/**
* zfcp_dbf_san_incoming_els - trace event for incomig ELS
* @fsf_req: request containing unsolicited status buffer with incoming ELS
*/
void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
{
struct fsf_status_read_buffer *buf =
(struct fsf_status_read_buffer *)fsf_req->data;
int length = (int)buf->length -
(int)((void *)&buf->payload - (void *)buf);
zfcp_dbf_san_els("iels", 1, fsf_req, ntoh24(buf->d_id),
(void *)buf->payload.data, length);
}
static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
char *p = out_buf;
if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
return 0;
zfcp_dbf_tag(&p, "tag", r->tag);
zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
zfcp_dbf_out(&p, "d_id", "0x%06x", ct->d_id);
zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
} else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
} else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
struct zfcp_dbf_san_record_els *els = &r->u.els;
zfcp_dbf_out(&p, "d_id", "0x%06x", els->d_id);
}
return p - out_buf;
}
static struct debug_view zfcp_dbf_san_view = {
.name = "structured",
.header_proc = zfcp_dbf_view_header,
.format_proc = zfcp_dbf_san_view_format,
};
void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
{
struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
unsigned long flags;
struct fcp_resp_with_ext *fcp_rsp;
struct fcp_resp_rsp_info *fcp_rsp_info = NULL;
char *fcp_sns_info = NULL;
int offset = 0, buflen = 0;
spin_lock_irqsave(&dbf->scsi_lock, flags);
do {
memset(rec, 0, sizeof(*rec));
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;
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_resp_with_ext *)
&(fsf_req->qtcb->bottom.io.fcp_rsp);
fcp_rsp_info = (struct fcp_resp_rsp_info *)
&fcp_rsp[1];
fcp_sns_info = (char *) &fcp_rsp[1];
if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
fcp_sns_info += fcp_rsp->ext.fr_sns_len;
rec->rsp_validity = fcp_rsp->resp.fr_flags;
rec->rsp_scsi_status = fcp_rsp->resp.fr_status;
rec->rsp_resid = fcp_rsp->ext.fr_resid;
if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL)
rec->rsp_code = fcp_rsp_info->rsp_code;
if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
buflen = min(fcp_rsp->ext.fr_sns_len,
(u32)ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
rec->sns_info_len = buflen;
memcpy(rec->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 = fsf_req->req_id;
rec->fsf_seqno = fsf_req->seq_no;
rec->fsf_issued = fsf_req->issued;
}
rec->old_fsf_reqid = old_req_id;
} 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_dbf_scsi_record) -
(int)sizeof(struct zfcp_dbf_dump));
memcpy(dump->data, fcp_sns_info + offset, dump->size);
offset += dump->size;
}
debug_event(dbf->scsi, level, rec, sizeof(*rec));
} while (offset < buflen);
spin_unlock_irqrestore(&dbf->scsi_lock, flags);
}
static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
struct timespec t;
char *p = out_buf;
if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
return 0;
zfcp_dbf_tag(&p, "tag", r->tag);
zfcp_dbf_tag(&p, "tag2", r->tag2);
zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
0, ZFCP_DBF_SCSI_OPCODE);
zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
stck_to_timespec(r->fsf_issued, &t);
zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
r->rsp_scsi_status);
zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
min((int)r->sns_info_len,
ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
r->sns_info_len);
}
p += sprintf(p, "\n");
return p - out_buf;
}
static struct debug_view zfcp_dbf_scsi_view = {
.name = "structured",
.header_proc = zfcp_dbf_view_header,
.format_proc = zfcp_dbf_scsi_view_format,
};
static debug_info_t *zfcp_dbf_reg(const char *name, int level,
struct debug_view *view, int size)
{
struct debug_info *d;
d = debug_register(name, dbfsize, level, size);
if (!d)
return NULL;
debug_register_view(d, &debug_hex_ascii_view);
debug_register_view(d, view);
debug_set_level(d, level);
return d;
}
/**
* 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 dbf_name[DEBUG_MAX_NAME_LEN];
struct zfcp_dbf *dbf;
dbf = kzalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
if (!dbf)
return -ENOMEM;
dbf->adapter = adapter;
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(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
sizeof(struct zfcp_dbf_rec_record));
if (!dbf->rec)
goto err_out;
/* debug feature area which records HBA (FSF and QDIO) conditions */
sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
sizeof(struct zfcp_dbf_hba_record));
if (!dbf->hba)
goto err_out;
/* debug feature area which records SAN command failures and recovery */
sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
sizeof(struct zfcp_dbf_san_record));
if (!dbf->san)
goto err_out;
/* debug feature area which records SCSI command failures and recovery */
sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
sizeof(struct zfcp_dbf_scsi_record));
if (!dbf->scsi)
goto err_out;
adapter->dbf = dbf;
return 0;
err_out:
zfcp_dbf_adapter_unregister(dbf);
return -ENOMEM;
}
/**
* zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
* @dbf: pointer to dbf for which debug features should be unregistered
*/
void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
{
if (!dbf)
return;
debug_unregister(dbf->scsi);
debug_unregister(dbf->san);
debug_unregister(dbf->hba);
debug_unregister(dbf->rec);
dbf->adapter->dbf = NULL;
kfree(dbf);
}
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