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linux/drivers/s390/scsi/zfcp_dbf.h
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* zfcp device driver
* debug feature declarations
*
* Copyright IBM Corp. 2008, 2017
*/
#ifndef ZFCP_DBF_H
#define ZFCP_DBF_H
#include <scsi/fc/fc_fcp.h>
#include "zfcp_ext.h"
#include "zfcp_fsf.h"
#include "zfcp_def.h"
#define ZFCP_DBF_TAG_LEN 7
#define ZFCP_DBF_INVALID_LUN 0xFFFFFFFFFFFFFFFFull
enum zfcp_dbf_pseudo_erp_act_type {
ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD = 0xff,
ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL = 0xfe,
};
/**
* struct zfcp_dbf_rec_trigger - trace record for triggered recovery action
* @ready: number of ready recovery actions
* @running: number of running recovery actions
* @want: wanted recovery action
* @need: needed recovery action
*/
struct zfcp_dbf_rec_trigger {
u32 ready;
u32 running;
u8 want;
u8 need;
} __packed;
/**
* struct zfcp_dbf_rec_running - trace record for running recovery
* @fsf_req_id: request id for fsf requests
* @rec_status: status of the fsf request
* @rec_step: current step of the recovery action
* rec_count: recovery counter
*/
struct zfcp_dbf_rec_running {
u64 fsf_req_id;
u32 rec_status;
u16 rec_step;
u8 rec_action;
u8 rec_count;
} __packed;
/**
* enum zfcp_dbf_rec_id - recovery trace record id
* @ZFCP_DBF_REC_TRIG: triggered recovery identifier
* @ZFCP_DBF_REC_RUN: running recovery identifier
*/
enum zfcp_dbf_rec_id {
ZFCP_DBF_REC_TRIG = 1,
ZFCP_DBF_REC_RUN = 2,
};
/**
* struct zfcp_dbf_rec - trace record for error recovery actions
* @id: unique number of recovery record type
* @tag: identifier string specifying the location of initiation
* @lun: logical unit number
* @wwpn: word wide port number
* @d_id: destination ID
* @adapter_status: current status of the adapter
* @port_status: current status of the port
* @lun_status: current status of the lun
* @u.trig: structure zfcp_dbf_rec_trigger
* @u.run: structure zfcp_dbf_rec_running
*/
struct zfcp_dbf_rec {
u8 id;
char tag[ZFCP_DBF_TAG_LEN];
u64 lun;
u64 wwpn;
u32 d_id;
u32 adapter_status;
u32 port_status;
u32 lun_status;
union {
struct zfcp_dbf_rec_trigger trig;
struct zfcp_dbf_rec_running run;
} u;
} __packed;
/**
* enum zfcp_dbf_san_id - SAN trace record identifier
* @ZFCP_DBF_SAN_REQ: request trace record id
* @ZFCP_DBF_SAN_RES: response trace record id
* @ZFCP_DBF_SAN_ELS: extended link service record id
*/
enum zfcp_dbf_san_id {
ZFCP_DBF_SAN_REQ = 1,
ZFCP_DBF_SAN_RES = 2,
ZFCP_DBF_SAN_ELS = 3,
};
/** struct zfcp_dbf_san - trace record for SAN requests and responses
* @id: unique number of recovery record type
* @tag: identifier string specifying the location of initiation
* @fsf_req_id: request id for fsf requests
* @payload: unformatted information related to request/response
* @d_id: destination id
*/
struct zfcp_dbf_san {
u8 id;
char tag[ZFCP_DBF_TAG_LEN];
u64 fsf_req_id;
u32 d_id;
#define ZFCP_DBF_SAN_MAX_PAYLOAD (FC_CT_HDR_LEN + 32)
char payload[ZFCP_DBF_SAN_MAX_PAYLOAD];
u16 pl_len;
} __packed;
/**
* struct zfcp_dbf_hba_res - trace record for hba responses
* @req_issued: timestamp when request was issued
* @prot_status: protocol status
* @prot_status_qual: protocol status qualifier
* @fsf_status: fsf status
* @fsf_status_qual: fsf status qualifier
*/
struct zfcp_dbf_hba_res {
u64 req_issued;
u32 prot_status;
u8 prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
u32 fsf_status;
u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
u32 port_handle;
u32 lun_handle;
} __packed;
/**
* struct zfcp_dbf_hba_uss - trace record for unsolicited status
* @status_type: type of unsolicited status
* @status_subtype: subtype of unsolicited status
* @d_id: destination ID
* @lun: logical unit number
* @queue_designator: queue designator
*/
struct zfcp_dbf_hba_uss {
u32 status_type;
u32 status_subtype;
u32 d_id;
u64 lun;
u64 queue_designator;
} __packed;
/**
* enum zfcp_dbf_hba_id - HBA trace record identifier
* @ZFCP_DBF_HBA_RES: response trace record
* @ZFCP_DBF_HBA_USS: unsolicited status trace record
* @ZFCP_DBF_HBA_BIT: bit error trace record
*/
enum zfcp_dbf_hba_id {
ZFCP_DBF_HBA_RES = 1,
ZFCP_DBF_HBA_USS = 2,
ZFCP_DBF_HBA_BIT = 3,
ZFCP_DBF_HBA_BASIC = 4,
};
/**
* struct zfcp_dbf_hba - common trace record for HBA records
* @id: unique number of recovery record type
* @tag: identifier string specifying the location of initiation
* @fsf_req_id: request id for fsf requests
* @fsf_req_status: status of fsf request
* @fsf_cmd: fsf command
* @fsf_seq_no: fsf sequence number
* @pl_len: length of payload stored as zfcp_dbf_pay
* @u: record type specific data
*/
struct zfcp_dbf_hba {
u8 id;
char tag[ZFCP_DBF_TAG_LEN];
u64 fsf_req_id;
u32 fsf_req_status;
u32 fsf_cmd;
u32 fsf_seq_no;
u16 pl_len;
union {
struct zfcp_dbf_hba_res res;
struct zfcp_dbf_hba_uss uss;
struct fsf_bit_error_payload be;
} u;
} __packed;
/**
* enum zfcp_dbf_scsi_id - scsi trace record identifier
* @ZFCP_DBF_SCSI_CMND: scsi command trace record
*/
enum zfcp_dbf_scsi_id {
ZFCP_DBF_SCSI_CMND = 1,
};
/**
* struct zfcp_dbf_scsi - common trace record for SCSI records
* @id: unique number of recovery record type
* @tag: identifier string specifying the location of initiation
* @scsi_id: scsi device id
* @scsi_lun: scsi device logical unit number, low part of 64 bit, old 32 bit
* @scsi_result: scsi result
* @scsi_retries: current retry number of scsi request
* @scsi_allowed: allowed retries
* @fcp_rsp_info: FCP response info code
* @scsi_opcode: scsi opcode
* @fsf_req_id: request id of fsf request
* @host_scribble: LLD specific data attached to SCSI request
* @pl_len: length of payload stored as zfcp_dbf_pay
* @fcp_rsp: response for FCP request
* @scsi_lun_64_hi: scsi device logical unit number, high part of 64 bit
*/
struct zfcp_dbf_scsi {
u8 id;
char tag[ZFCP_DBF_TAG_LEN];
u32 scsi_id;
u32 scsi_lun;
u32 scsi_result;
u8 scsi_retries;
u8 scsi_allowed;
u8 fcp_rsp_info;
#define ZFCP_DBF_SCSI_OPCODE 16
u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
u64 fsf_req_id;
u64 host_scribble;
u16 pl_len;
struct fcp_resp_with_ext fcp_rsp;
u32 scsi_lun_64_hi;
} __packed;
/**
* struct zfcp_dbf_pay - trace record for unformatted payload information
* @area: area this record is originated from
* @counter: ascending record number
* @fsf_req_id: request id of fsf request
* @data: unformatted data
*/
struct zfcp_dbf_pay {
u8 counter;
char area[ZFCP_DBF_TAG_LEN];
u64 fsf_req_id;
#define ZFCP_DBF_PAY_MAX_REC 0x100
char data[ZFCP_DBF_PAY_MAX_REC];
} __packed;
/**
* struct zfcp_dbf - main dbf trace structure
* @pay: reference to payload trace area
* @rec: reference to recovery trace area
* @hba: reference to hba trace area
* @san: reference to san trace area
* @scsi: reference to scsi trace area
* @pay_lock: lock protecting payload trace buffer
* @rec_lock: lock protecting recovery trace buffer
* @hba_lock: lock protecting hba trace buffer
* @san_lock: lock protecting san trace buffer
* @scsi_lock: lock protecting scsi trace buffer
* @pay_buf: pre-allocated buffer for payload
* @rec_buf: pre-allocated buffer for recovery
* @hba_buf: pre-allocated buffer for hba
* @san_buf: pre-allocated buffer for san
* @scsi_buf: pre-allocated buffer for scsi
*/
struct zfcp_dbf {
debug_info_t *pay;
debug_info_t *rec;
debug_info_t *hba;
debug_info_t *san;
debug_info_t *scsi;
spinlock_t pay_lock;
spinlock_t rec_lock;
spinlock_t hba_lock;
spinlock_t san_lock;
spinlock_t scsi_lock;
struct zfcp_dbf_pay pay_buf;
struct zfcp_dbf_rec rec_buf;
struct zfcp_dbf_hba hba_buf;
struct zfcp_dbf_san san_buf;
struct zfcp_dbf_scsi scsi_buf;
};
/**
* zfcp_dbf_hba_fsf_resp_suppress - true if we should not trace by default
* @req: request that has been completed
*
* Returns true if FCP response with only benign residual under count.
*/
static inline
bool zfcp_dbf_hba_fsf_resp_suppress(struct zfcp_fsf_req *req)
{
struct fsf_qtcb *qtcb = req->qtcb;
u32 fsf_stat = qtcb->header.fsf_status;
struct fcp_resp *fcp_rsp;
u8 rsp_flags, fr_status;
if (qtcb->prefix.qtcb_type != FSF_IO_COMMAND)
return false; /* not an FCP response */
fcp_rsp = &qtcb->bottom.io.fcp_rsp.iu.resp;
rsp_flags = fcp_rsp->fr_flags;
fr_status = fcp_rsp->fr_status;
return (fsf_stat == FSF_FCP_RSP_AVAILABLE) &&
(rsp_flags == FCP_RESID_UNDER) &&
(fr_status == SAM_STAT_GOOD);
}
static inline
void zfcp_dbf_hba_fsf_resp(char *tag, int level, struct zfcp_fsf_req *req)
{
if (debug_level_enabled(req->adapter->dbf->hba, level))
zfcp_dbf_hba_fsf_res(tag, level, req);
}
/**
* zfcp_dbf_hba_fsf_response - trace event for request completion
* @req: request that has been completed
*/
static inline
void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
{
struct fsf_qtcb *qtcb = req->qtcb;
if (unlikely(req->status & (ZFCP_STATUS_FSFREQ_DISMISSED |
ZFCP_STATUS_FSFREQ_ERROR))) {
zfcp_dbf_hba_fsf_resp("fs_rerr", 3, req);
} else if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
(qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
zfcp_dbf_hba_fsf_resp("fs_perr", 1, req);
} else if (qtcb->header.fsf_status != FSF_GOOD) {
zfcp_dbf_hba_fsf_resp("fs_ferr",
zfcp_dbf_hba_fsf_resp_suppress(req)
? 5 : 1, req);
} else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
(req->fsf_command == FSF_QTCB_OPEN_LUN)) {
zfcp_dbf_hba_fsf_resp("fs_open", 4, req);
} else if (qtcb->header.log_length) {
zfcp_dbf_hba_fsf_resp("fs_qtcb", 5, req);
} else {
zfcp_dbf_hba_fsf_resp("fs_norm", 6, req);
}
}
static inline
void _zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *scmd,
struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *)
scmd->device->host->hostdata[0];
if (debug_level_enabled(adapter->dbf->scsi, level))
zfcp_dbf_scsi(tag, level, scmd, req);
}
/**
* zfcp_dbf_scsi_result - trace event for SCSI command completion
* @scmd: SCSI command pointer
* @req: FSF request used to issue SCSI command
*/
static inline
void zfcp_dbf_scsi_result(struct scsi_cmnd *scmd, struct zfcp_fsf_req *req)
{
if (scmd->result != 0)
_zfcp_dbf_scsi("rsl_err", 3, scmd, req);
else if (scmd->retries > 0)
_zfcp_dbf_scsi("rsl_ret", 4, scmd, req);
else
_zfcp_dbf_scsi("rsl_nor", 6, scmd, req);
}
/**
* zfcp_dbf_scsi_fail_send - trace event for failure to send SCSI command
* @scmd: SCSI command pointer
*/
static inline
void zfcp_dbf_scsi_fail_send(struct scsi_cmnd *scmd)
{
_zfcp_dbf_scsi("rsl_fai", 4, scmd, NULL);
}
/**
* zfcp_dbf_scsi_abort - trace event for SCSI command abort
* @tag: tag indicating success or failure of abort operation
* @scmd: SCSI command to be aborted
* @fsf_req: request containing abort (might be NULL)
*/
static inline
void zfcp_dbf_scsi_abort(char *tag, struct scsi_cmnd *scmd,
struct zfcp_fsf_req *fsf_req)
{
_zfcp_dbf_scsi(tag, 1, scmd, fsf_req);
}
/**
* zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset
* @tag: tag indicating success or failure of reset operation
* @scmnd: SCSI command which caused this error recovery
* @flag: indicates type of reset (Target Reset, Logical Unit Reset)
*/
static inline
void zfcp_dbf_scsi_devreset(char *tag, struct scsi_cmnd *scmnd, u8 flag,
struct zfcp_fsf_req *fsf_req)
{
char tmp_tag[ZFCP_DBF_TAG_LEN];
if (flag == FCP_TMF_TGT_RESET)
memcpy(tmp_tag, "tr_", 3);
else
memcpy(tmp_tag, "lr_", 3);
memcpy(&tmp_tag[3], tag, 4);
_zfcp_dbf_scsi(tmp_tag, 1, scmnd, fsf_req);
}
/**
* zfcp_dbf_scsi_nullcmnd() - trace NULLify of SCSI command in dev/tgt-reset.
* @scmnd: SCSI command that was NULLified.
* @fsf_req: request that owned @scmnd.
*/
static inline void zfcp_dbf_scsi_nullcmnd(struct scsi_cmnd *scmnd,
struct zfcp_fsf_req *fsf_req)
{
_zfcp_dbf_scsi("scfc__1", 3, scmnd, fsf_req);
}
#endif /* ZFCP_DBF_H */
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