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linuxdebug/drivers/s390/scsi/zfcp_dbf.c

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// SPDX-License-Identifier: GPL-2.0
/*
* zfcp device driver
*
* Debug traces for zfcp.
*
* Copyright IBM Corp. 2002, 2020
*/
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#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 u32 dbflevel = 3;
module_param(dbflevel, uint, 0400);
MODULE_PARM_DESC(dbflevel,
"log level for each debug feature area "
"(default 3, range 0..6)");
static inline unsigned int zfcp_dbf_plen(unsigned int offset)
{
return sizeof(struct zfcp_dbf_pay) + offset - ZFCP_DBF_PAY_MAX_REC;
}
static inline
void zfcp_dbf_pl_write(struct zfcp_dbf *dbf, void *data, u16 length, char *area,
u64 req_id)
{
struct zfcp_dbf_pay *pl = &dbf->pay_buf;
u16 offset = 0, rec_length;
spin_lock(&dbf->pay_lock);
memset(pl, 0, sizeof(*pl));
pl->fsf_req_id = req_id;
memcpy(pl->area, area, ZFCP_DBF_TAG_LEN);
while (offset < length) {
rec_length = min((u16) ZFCP_DBF_PAY_MAX_REC,
(u16) (length - offset));
memcpy(pl->data, data + offset, rec_length);
debug_event(dbf->pay, 1, pl, zfcp_dbf_plen(rec_length));
offset += rec_length;
pl->counter++;
}
spin_unlock(&dbf->pay_lock);
}
/**
* zfcp_dbf_hba_fsf_res - trace event for fsf responses
* @tag: tag indicating which kind of FSF response has been received
* @level: trace level to be used for event
* @req: request for which a response was received
*/
void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req)
{
struct zfcp_dbf *dbf = req->adapter->dbf;
struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;
struct fsf_qtcb_header *q_head = &req->qtcb->header;
struct zfcp_dbf_hba *rec = &dbf->hba_buf;
unsigned long flags;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(rec, 0, sizeof(*rec));
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->id = ZFCP_DBF_HBA_RES;
rec->fsf_req_id = req->req_id;
rec->fsf_req_status = req->status;
rec->fsf_cmd = q_head->fsf_command;
rec->fsf_seq_no = q_pref->req_seq_no;
rec->u.res.req_issued = req->issued;
rec->u.res.prot_status = q_pref->prot_status;
rec->u.res.fsf_status = q_head->fsf_status;
rec->u.res.port_handle = q_head->port_handle;
rec->u.res.lun_handle = q_head->lun_handle;
memcpy(rec->u.res.prot_status_qual, &q_pref->prot_status_qual,
FSF_PROT_STATUS_QUAL_SIZE);
memcpy(rec->u.res.fsf_status_qual, &q_head->fsf_status_qual,
FSF_STATUS_QUALIFIER_SIZE);
rec->pl_len = q_head->log_length;
zfcp_dbf_pl_write(dbf, (char *)q_pref + q_head->log_start,
rec->pl_len, "fsf_res", req->req_id);
debug_event(dbf->hba, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
/**
* zfcp_dbf_hba_fsf_fces - trace event for fsf responses related to
* FC Endpoint Security (FCES)
* @tag: tag indicating which kind of FC Endpoint Security event has occurred
* @req: request for which a response was received
* @wwpn: remote port or ZFCP_DBF_INVALID_WWPN
* @fc_security_old: old FC Endpoint Security of FCP device or connection
* @fc_security_new: new FC Endpoint Security of FCP device or connection
*/
void zfcp_dbf_hba_fsf_fces(char *tag, const struct zfcp_fsf_req *req, u64 wwpn,
u32 fc_security_old, u32 fc_security_new)
{
struct zfcp_dbf *dbf = req->adapter->dbf;
struct fsf_qtcb_prefix *q_pref = &req->qtcb->prefix;
struct fsf_qtcb_header *q_head = &req->qtcb->header;
struct zfcp_dbf_hba *rec = &dbf->hba_buf;
static int const level = 3;
unsigned long flags;
if (unlikely(!debug_level_enabled(dbf->hba, level)))
return;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(rec, 0, sizeof(*rec));
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->id = ZFCP_DBF_HBA_FCES;
rec->fsf_req_id = req->req_id;
rec->fsf_req_status = req->status;
rec->fsf_cmd = q_head->fsf_command;
rec->fsf_seq_no = q_pref->req_seq_no;
rec->u.fces.req_issued = req->issued;
rec->u.fces.fsf_status = q_head->fsf_status;
rec->u.fces.port_handle = q_head->port_handle;
rec->u.fces.wwpn = wwpn;
rec->u.fces.fc_security_old = fc_security_old;
rec->u.fces.fc_security_new = fc_security_new;
debug_event(dbf->hba, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
/**
* zfcp_dbf_hba_fsf_uss - trace event for an unsolicited status buffer
* @tag: tag indicating which kind of unsolicited status has been received
* @req: request providing the unsolicited status
*/
void zfcp_dbf_hba_fsf_uss(char *tag, struct zfcp_fsf_req *req)
{
struct zfcp_dbf *dbf = req->adapter->dbf;
struct fsf_status_read_buffer *srb = req->data;
struct zfcp_dbf_hba *rec = &dbf->hba_buf;
static int const level = 2;
unsigned long flags;
if (unlikely(!debug_level_enabled(dbf->hba, level)))
return;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(rec, 0, sizeof(*rec));
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->id = ZFCP_DBF_HBA_USS;
rec->fsf_req_id = req->req_id;
rec->fsf_req_status = req->status;
rec->fsf_cmd = FSF_QTCB_UNSOLICITED_STATUS;
if (!srb)
goto log;
rec->u.uss.status_type = srb->status_type;
rec->u.uss.status_subtype = srb->status_subtype;
rec->u.uss.d_id = ntoh24(srb->d_id);
rec->u.uss.lun = srb->fcp_lun;
memcpy(&rec->u.uss.queue_designator, &srb->queue_designator,
sizeof(rec->u.uss.queue_designator));
/* status read buffer payload length */
rec->pl_len = (!srb->length) ? 0 : srb->length -
offsetof(struct fsf_status_read_buffer, payload);
if (rec->pl_len)
zfcp_dbf_pl_write(dbf, srb->payload.data, rec->pl_len,
"fsf_uss", req->req_id);
log:
debug_event(dbf->hba, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
/**
* zfcp_dbf_hba_bit_err - trace event for bit error conditions
* @tag: tag indicating which kind of bit error unsolicited status was received
* @req: request which caused the bit_error condition
*/
void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req)
{
struct zfcp_dbf *dbf = req->adapter->dbf;
struct zfcp_dbf_hba *rec = &dbf->hba_buf;
struct fsf_status_read_buffer *sr_buf = req->data;
static int const level = 1;
unsigned long flags;
if (unlikely(!debug_level_enabled(dbf->hba, level)))
return;
spin_lock_irqsave(&dbf->hba_lock, flags);
memset(rec, 0, sizeof(*rec));
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->id = ZFCP_DBF_HBA_BIT;
rec->fsf_req_id = req->req_id;
rec->fsf_req_status = req->status;
rec->fsf_cmd = FSF_QTCB_UNSOLICITED_STATUS;
memcpy(&rec->u.be, &sr_buf->payload.bit_error,
sizeof(struct fsf_bit_error_payload));
debug_event(dbf->hba, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
/**
* zfcp_dbf_hba_def_err - trace event for deferred error messages
* @adapter: pointer to struct zfcp_adapter
* @req_id: request id which caused the deferred error message
* @scount: number of sbals incl. the signaling sbal
* @pl: array of all involved sbals
*/
void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount,
void **pl)
{
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_pay *payload = &dbf->pay_buf;
unsigned long flags;
static int const level = 1;
u16 length;
if (unlikely(!debug_level_enabled(dbf->pay, level)))
return;
if (!pl)
return;
spin_lock_irqsave(&dbf->pay_lock, flags);
memset(payload, 0, sizeof(*payload));
memcpy(payload->area, "def_err", 7);
payload->fsf_req_id = req_id;
payload->counter = 0;
length = min((u16)sizeof(struct qdio_buffer),
(u16)ZFCP_DBF_PAY_MAX_REC);
while (payload->counter < scount && (char *)pl[payload->counter]) {
memcpy(payload->data, (char *)pl[payload->counter], length);
debug_event(dbf->pay, level, payload, zfcp_dbf_plen(length));
payload->counter++;
}
spin_unlock_irqrestore(&dbf->pay_lock, flags);
}
static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec,
struct zfcp_adapter *adapter,
struct zfcp_port *port,
struct scsi_device *sdev)
{
rec->adapter_status = atomic_read(&adapter->status);
if (port) {
rec->port_status = atomic_read(&port->status);
rec->wwpn = port->wwpn;
rec->d_id = port->d_id;
}
if (sdev) {
rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status);
rec->lun = zfcp_scsi_dev_lun(sdev);
} else
rec->lun = ZFCP_DBF_INVALID_LUN;
}
/**
* zfcp_dbf_rec_trig - trace event related to triggered recovery
* @tag: identifier for event
* @adapter: adapter on which the erp_action should run
* @port: remote port involved in the erp_action
* @sdev: scsi device involved in the erp_action
* @want: wanted erp_action
* @need: required erp_action
*
* The adapter->erp_lock has to be held.
*/
void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter,
struct zfcp_port *port, struct scsi_device *sdev,
u8 want, u8 need)
{
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_rec *rec = &dbf->rec_buf;
static int const level = 1;
struct list_head *entry;
unsigned long flags;
lockdep_assert_held(&adapter->erp_lock);
if (unlikely(!debug_level_enabled(dbf->rec, level)))
return;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(rec, 0, sizeof(*rec));
rec->id = ZFCP_DBF_REC_TRIG;
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
zfcp_dbf_set_common(rec, adapter, port, sdev);
list_for_each(entry, &adapter->erp_ready_head)
rec->u.trig.ready++;
list_for_each(entry, &adapter->erp_running_head)
rec->u.trig.running++;
rec->u.trig.want = want;
rec->u.trig.need = need;
debug_event(dbf->rec, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_rec_trig_lock - trace event related to triggered recovery with lock
* @tag: identifier for event
* @adapter: adapter on which the erp_action should run
* @port: remote port involved in the erp_action
* @sdev: scsi device involved in the erp_action
* @want: wanted erp_action
* @need: required erp_action
*
* The adapter->erp_lock must not be held.
*/
void zfcp_dbf_rec_trig_lock(char *tag, struct zfcp_adapter *adapter,
struct zfcp_port *port, struct scsi_device *sdev,
u8 want, u8 need)
{
unsigned long flags;
read_lock_irqsave(&adapter->erp_lock, flags);
zfcp_dbf_rec_trig(tag, adapter, port, sdev, want, need);
read_unlock_irqrestore(&adapter->erp_lock, flags);
}
/**
* zfcp_dbf_rec_run_lvl - trace event related to running recovery
* @level: trace level to be used for event
* @tag: identifier for event
* @erp: erp_action running
*/
void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp)
{
struct zfcp_dbf *dbf = erp->adapter->dbf;
struct zfcp_dbf_rec *rec = &dbf->rec_buf;
unsigned long flags;
if (!debug_level_enabled(dbf->rec, level))
return;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(rec, 0, sizeof(*rec));
rec->id = ZFCP_DBF_REC_RUN;
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
zfcp_dbf_set_common(rec, erp->adapter, erp->port, erp->sdev);
rec->u.run.fsf_req_id = erp->fsf_req_id;
rec->u.run.rec_status = erp->status;
rec->u.run.rec_step = erp->step;
rec->u.run.rec_action = erp->type;
if (erp->sdev)
rec->u.run.rec_count =
atomic_read(&sdev_to_zfcp(erp->sdev)->erp_counter);
else if (erp->port)
rec->u.run.rec_count = atomic_read(&erp->port->erp_counter);
else
rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter);
debug_event(dbf->rec, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
/**
* zfcp_dbf_rec_run - trace event related to running recovery
* @tag: identifier for event
* @erp: erp_action running
*/
void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)
{
zfcp_dbf_rec_run_lvl(1, tag, erp);
}
/**
* zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery
* @tag: identifier for event
* @wka_port: well known address port
* @req_id: request ID to correlate with potential HBA trace record
*/
void zfcp_dbf_rec_run_wka(char *tag, struct zfcp_fc_wka_port *wka_port,
u64 req_id)
{
struct zfcp_dbf *dbf = wka_port->adapter->dbf;
struct zfcp_dbf_rec *rec = &dbf->rec_buf;
static int const level = 1;
unsigned long flags;
if (unlikely(!debug_level_enabled(dbf->rec, level)))
return;
spin_lock_irqsave(&dbf->rec_lock, flags);
memset(rec, 0, sizeof(*rec));
rec->id = ZFCP_DBF_REC_RUN;
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->port_status = wka_port->status;
rec->d_id = wka_port->d_id;
rec->lun = ZFCP_DBF_INVALID_LUN;
rec->u.run.fsf_req_id = req_id;
rec->u.run.rec_status = ~0;
rec->u.run.rec_step = ~0;
rec->u.run.rec_action = ~0;
rec->u.run.rec_count = ~0;
debug_event(dbf->rec, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
#define ZFCP_DBF_SAN_LEVEL 1
static inline
void zfcp_dbf_san(char *tag, struct zfcp_dbf *dbf,
char *paytag, struct scatterlist *sg, u8 id, u16 len,
u64 req_id, u32 d_id, u16 cap_len)
{
struct zfcp_dbf_san *rec = &dbf->san_buf;
u16 rec_len;
unsigned long flags;
struct zfcp_dbf_pay *payload = &dbf->pay_buf;
u16 pay_sum = 0;
spin_lock_irqsave(&dbf->san_lock, flags);
memset(rec, 0, sizeof(*rec));
rec->id = id;
rec->fsf_req_id = req_id;
rec->d_id = d_id;
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->pl_len = len; /* full length even if we cap pay below */
if (!sg)
goto out;
rec_len = min_t(unsigned int, sg->length, ZFCP_DBF_SAN_MAX_PAYLOAD);
memcpy(rec->payload, sg_virt(sg), rec_len); /* part of 1st sg entry */
if (len <= rec_len)
goto out; /* skip pay record if full content in rec->payload */
/* if (len > rec_len):
* dump data up to cap_len ignoring small duplicate in rec->payload
*/
spin_lock(&dbf->pay_lock);
memset(payload, 0, sizeof(*payload));
memcpy(payload->area, paytag, ZFCP_DBF_TAG_LEN);
payload->fsf_req_id = req_id;
payload->counter = 0;
for (; sg && pay_sum < cap_len; sg = sg_next(sg)) {
u16 pay_len, offset = 0;
while (offset < sg->length && pay_sum < cap_len) {
pay_len = min((u16)ZFCP_DBF_PAY_MAX_REC,
(u16)(sg->length - offset));
/* cap_len <= pay_sum < cap_len+ZFCP_DBF_PAY_MAX_REC */
memcpy(payload->data, sg_virt(sg) + offset, pay_len);
debug_event(dbf->pay, ZFCP_DBF_SAN_LEVEL, payload,
zfcp_dbf_plen(pay_len));
payload->counter++;
offset += pay_len;
pay_sum += pay_len;
}
}
spin_unlock(&dbf->pay_lock);
out:
debug_event(dbf->san, ZFCP_DBF_SAN_LEVEL, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->san_lock, flags);
}
/**
* zfcp_dbf_san_req - trace event for issued SAN request
* @tag: identifier for event
* @fsf: request containing issued CT or ELS data
* @d_id: N_Port_ID where SAN request is sent to
* d_id: destination ID
*/
void zfcp_dbf_san_req(char *tag, struct zfcp_fsf_req *fsf, u32 d_id)
{
struct zfcp_dbf *dbf = fsf->adapter->dbf;
struct zfcp_fsf_ct_els *ct_els = fsf->data;
u16 length;
if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))
return;
length = (u16)zfcp_qdio_real_bytes(ct_els->req);
zfcp_dbf_san(tag, dbf, "san_req", ct_els->req, ZFCP_DBF_SAN_REQ,
length, fsf->req_id, d_id, length);
}
static u16 zfcp_dbf_san_res_cap_len_if_gpn_ft(char *tag,
struct zfcp_fsf_req *fsf,
u16 len)
{
struct zfcp_fsf_ct_els *ct_els = fsf->data;
struct fc_ct_hdr *reqh = sg_virt(ct_els->req);
struct fc_ns_gid_ft *reqn = (struct fc_ns_gid_ft *)(reqh + 1);
struct scatterlist *resp_entry = ct_els->resp;
struct fc_ct_hdr *resph;
struct fc_gpn_ft_resp *acc;
int max_entries, x, last = 0;
if (!(memcmp(tag, "fsscth2", 7) == 0
&& ct_els->d_id == FC_FID_DIR_SERV
&& reqh->ct_rev == FC_CT_REV
&& reqh->ct_in_id[0] == 0
&& reqh->ct_in_id[1] == 0
&& reqh->ct_in_id[2] == 0
&& reqh->ct_fs_type == FC_FST_DIR
&& reqh->ct_fs_subtype == FC_NS_SUBTYPE
&& reqh->ct_options == 0
&& reqh->_ct_resvd1 == 0
&& reqh->ct_cmd == cpu_to_be16(FC_NS_GPN_FT)
/* reqh->ct_mr_size can vary so do not match but read below */
&& reqh->_ct_resvd2 == 0
&& reqh->ct_reason == 0
&& reqh->ct_explan == 0
&& reqh->ct_vendor == 0
&& reqn->fn_resvd == 0
&& reqn->fn_domain_id_scope == 0
&& reqn->fn_area_id_scope == 0
&& reqn->fn_fc4_type == FC_TYPE_FCP))
return len; /* not GPN_FT response so do not cap */
acc = sg_virt(resp_entry);
/* cap all but accept CT responses to at least the CT header */
resph = (struct fc_ct_hdr *)acc;
if ((ct_els->status) ||
(resph->ct_cmd != cpu_to_be16(FC_FS_ACC)))
return max(FC_CT_HDR_LEN, ZFCP_DBF_SAN_MAX_PAYLOAD);
max_entries = (be16_to_cpu(reqh->ct_mr_size) * 4 /
sizeof(struct fc_gpn_ft_resp))
+ 1 /* zfcp_fc_scan_ports: bytes correct, entries off-by-one
* to account for header as 1st pseudo "entry" */;
/* the basic CT_IU preamble is the same size as one entry in the GPN_FT
* response, allowing us to skip special handling for it - just skip it
*/
for (x = 1; x < max_entries && !last; x++) {
if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
acc++;
else
acc = sg_virt(++resp_entry);
last = acc->fp_flags & FC_NS_FID_LAST;
}
len = min(len, (u16)(x * sizeof(struct fc_gpn_ft_resp)));
return len; /* cap after last entry */
}
/**
* zfcp_dbf_san_res - trace event for received SAN request
* @tag: identifier for event
* @fsf: request containing received CT or ELS data
*/
void zfcp_dbf_san_res(char *tag, struct zfcp_fsf_req *fsf)
{
struct zfcp_dbf *dbf = fsf->adapter->dbf;
struct zfcp_fsf_ct_els *ct_els = fsf->data;
u16 length;
if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))
return;
length = (u16)zfcp_qdio_real_bytes(ct_els->resp);
zfcp_dbf_san(tag, dbf, "san_res", ct_els->resp, ZFCP_DBF_SAN_RES,
length, fsf->req_id, ct_els->d_id,
zfcp_dbf_san_res_cap_len_if_gpn_ft(tag, fsf, length));
}
/**
* zfcp_dbf_san_in_els - trace event for incoming ELS
* @tag: identifier for event
* @fsf: request containing received ELS data
*/
void zfcp_dbf_san_in_els(char *tag, struct zfcp_fsf_req *fsf)
{
struct zfcp_dbf *dbf = fsf->adapter->dbf;
struct fsf_status_read_buffer *srb =
(struct fsf_status_read_buffer *) fsf->data;
u16 length;
struct scatterlist sg;
if (unlikely(!debug_level_enabled(dbf->san, ZFCP_DBF_SAN_LEVEL)))
return;
length = (u16)(srb->length -
offsetof(struct fsf_status_read_buffer, payload));
sg_init_one(&sg, srb->payload.data, length);
zfcp_dbf_san(tag, dbf, "san_els", &sg, ZFCP_DBF_SAN_ELS, length,
fsf->req_id, ntoh24(srb->d_id), length);
}
/**
* zfcp_dbf_scsi_common() - Common trace event helper for scsi.
* @tag: Identifier for event.
* @level: trace level of event.
* @sdev: Pointer to SCSI device as context for this event.
* @sc: Pointer to SCSI command, or NULL with task management function (TMF).
* @fsf: Pointer to FSF request, or NULL.
*/
void zfcp_dbf_scsi_common(char *tag, int level, struct scsi_device *sdev,
struct scsi_cmnd *sc, struct zfcp_fsf_req *fsf)
{
struct zfcp_adapter *adapter =
(struct zfcp_adapter *) sdev->host->hostdata[0];
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
struct fcp_resp_with_ext *fcp_rsp;
struct fcp_resp_rsp_info *fcp_rsp_info;
unsigned long flags;
spin_lock_irqsave(&dbf->scsi_lock, flags);
memset(rec, 0, sizeof(*rec));
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->id = ZFCP_DBF_SCSI_CMND;
if (sc) {
rec->scsi_result = sc->result;
rec->scsi_retries = sc->retries;
rec->scsi_allowed = sc->allowed;
rec->scsi_id = sc->device->id;
rec->scsi_lun = (u32)sc->device->lun;
rec->scsi_lun_64_hi = (u32)(sc->device->lun >> 32);
rec->host_scribble = (unsigned long)sc->host_scribble;
memcpy(rec->scsi_opcode, sc->cmnd,
min_t(int, sc->cmd_len, ZFCP_DBF_SCSI_OPCODE));
} else {
rec->scsi_result = ~0;
rec->scsi_retries = ~0;
rec->scsi_allowed = ~0;
rec->scsi_id = sdev->id;
rec->scsi_lun = (u32)sdev->lun;
rec->scsi_lun_64_hi = (u32)(sdev->lun >> 32);
rec->host_scribble = ~0;
memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);
}
if (fsf) {
rec->fsf_req_id = fsf->req_id;
rec->pl_len = FCP_RESP_WITH_EXT;
fcp_rsp = &(fsf->qtcb->bottom.io.fcp_rsp.iu);
/* mandatory parts of FCP_RSP IU in this SCSI record */
memcpy(&rec->fcp_rsp, fcp_rsp, FCP_RESP_WITH_EXT);
if (fcp_rsp->resp.fr_flags & FCP_RSP_LEN_VAL) {
fcp_rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
rec->fcp_rsp_info = fcp_rsp_info->rsp_code;
rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_rsp_len);
}
if (fcp_rsp->resp.fr_flags & FCP_SNS_LEN_VAL) {
rec->pl_len += be32_to_cpu(fcp_rsp->ext.fr_sns_len);
}
/* complete FCP_RSP IU in associated PAYload record
* but only if there are optional parts
*/
if (fcp_rsp->resp.fr_flags != 0)
zfcp_dbf_pl_write(
dbf, fcp_rsp,
/* at least one full PAY record
* but not beyond hardware response field
*/
min_t(u16, max_t(u16, rec->pl_len,
ZFCP_DBF_PAY_MAX_REC),
FSF_FCP_RSP_SIZE),
"fcp_riu", fsf->req_id);
}
debug_event(dbf->scsi, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->scsi_lock, flags);
}
/**
* zfcp_dbf_scsi_eh() - Trace event for special cases of scsi_eh callbacks.
* @tag: Identifier for event.
* @adapter: Pointer to zfcp adapter as context for this event.
* @scsi_id: SCSI ID/target to indicate scope of task management function (TMF).
* @ret: Return value of calling function.
*
* This SCSI trace variant does not depend on any of:
* scsi_cmnd, zfcp_fsf_req, scsi_device.
*/
void zfcp_dbf_scsi_eh(char *tag, struct zfcp_adapter *adapter,
unsigned int scsi_id, int ret)
{
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_scsi *rec = &dbf->scsi_buf;
unsigned long flags;
static int const level = 1;
if (unlikely(!debug_level_enabled(adapter->dbf->scsi, level)))
return;
spin_lock_irqsave(&dbf->scsi_lock, flags);
memset(rec, 0, sizeof(*rec));
memcpy(rec->tag, tag, ZFCP_DBF_TAG_LEN);
rec->id = ZFCP_DBF_SCSI_CMND;
rec->scsi_result = ret; /* re-use field, int is 4 bytes and fits */
rec->scsi_retries = ~0;
rec->scsi_allowed = ~0;
rec->fcp_rsp_info = ~0;
rec->scsi_id = scsi_id;
rec->scsi_lun = (u32)ZFCP_DBF_INVALID_LUN;
rec->scsi_lun_64_hi = (u32)(ZFCP_DBF_INVALID_LUN >> 32);
rec->host_scribble = ~0;
memset(rec->scsi_opcode, 0xff, ZFCP_DBF_SCSI_OPCODE);
debug_event(dbf->scsi, level, rec, sizeof(*rec));
spin_unlock_irqrestore(&dbf->scsi_lock, flags);
}
static debug_info_t *zfcp_dbf_reg(const char *name, int size, int rec_size)
{
struct debug_info *d;
d = debug_register(name, size, 1, rec_size);
if (!d)
return NULL;
debug_register_view(d, &debug_hex_ascii_view);
debug_set_level(d, dbflevel);
return d;
}
static void zfcp_dbf_unregister(struct zfcp_dbf *dbf)
{
if (!dbf)
return;
debug_unregister(dbf->scsi);
debug_unregister(dbf->san);
debug_unregister(dbf->hba);
debug_unregister(dbf->pay);
debug_unregister(dbf->rec);
kfree(dbf);
}
/**
* zfcp_dbf_adapter_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_dbf_adapter_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);
}
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