[mirror_ubuntu-jammy-kernel.git] / drivers / scsi / scsi_logging.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * scsi_logging.c
 *
 * Copyright (C) 2014 SUSE Linux Products GmbH
 * Copyright (C) 2014 Hannes Reinecke <hare@suse.de>
 */

#include <linux/kernel.h>
#include <linux/atomic.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_dbg.h>

static char *scsi_log_reserve_buffer(size_t *len)
{
	*len = 128;
	return kmalloc(*len, GFP_ATOMIC);
}

static void scsi_log_release_buffer(char *bufptr)
{
	kfree(bufptr);
}

static inline const char *scmd_name(const struct scsi_cmnd *scmd)
{
	return scmd->request->rq_disk ?
		scmd->request->rq_disk->disk_name : NULL;
}

static size_t sdev_format_header(char *logbuf, size_t logbuf_len,
				 const char *name, int tag)
{
	size_t off = 0;

	if (name)
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "[%s] ", name);

	if (WARN_ON(off >= logbuf_len))
		return off;

	if (tag >= 0)
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "tag#%d ", tag);
	return off;
}

void sdev_prefix_printk(const char *level, const struct scsi_device *sdev,
			const char *name, const char *fmt, ...)
{
	va_list args;
	char *logbuf;
	size_t off = 0, logbuf_len;

	if (!sdev)
		return;

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;

	if (name)
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "[%s] ", name);
	if (!WARN_ON(off >= logbuf_len)) {
		va_start(args, fmt);
		off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args);
		va_end(args);
	}
	dev_printk(level, &sdev->sdev_gendev, "%s", logbuf);
	scsi_log_release_buffer(logbuf);
}
EXPORT_SYMBOL(sdev_prefix_printk);

void scmd_printk(const char *level, const struct scsi_cmnd *scmd,
		const char *fmt, ...)
{
	va_list args;
	char *logbuf;
	size_t off = 0, logbuf_len;

	if (!scmd || !scmd->cmnd)
		return;

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;
	off = sdev_format_header(logbuf, logbuf_len, scmd_name(scmd),
				 scmd->request->tag);
	if (off < logbuf_len) {
		va_start(args, fmt);
		off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args);
		va_end(args);
	}
	dev_printk(level, &scmd->device->sdev_gendev, "%s", logbuf);
	scsi_log_release_buffer(logbuf);
}
EXPORT_SYMBOL(scmd_printk);

static size_t scsi_format_opcode_name(char *buffer, size_t buf_len,
				      const unsigned char *cdbp)
{
	int sa, cdb0;
	const char *cdb_name = NULL, *sa_name = NULL;
	size_t off;

	cdb0 = cdbp[0];
	if (cdb0 == VARIABLE_LENGTH_CMD) {
		int len = scsi_varlen_cdb_length(cdbp);

		if (len < 10) {
			off = scnprintf(buffer, buf_len,
					"short variable length command, len=%d",
					len);
			return off;
		}
		sa = (cdbp[8] << 8) + cdbp[9];
	} else
		sa = cdbp[1] & 0x1f;

	if (!scsi_opcode_sa_name(cdb0, sa, &cdb_name, &sa_name)) {
		if (cdb_name)
			off = scnprintf(buffer, buf_len, "%s", cdb_name);
		else {
			off = scnprintf(buffer, buf_len, "opcode=0x%x", cdb0);
			if (WARN_ON(off >= buf_len))
				return off;
			if (cdb0 >= VENDOR_SPECIFIC_CDB)
				off += scnprintf(buffer + off, buf_len - off,
						 " (vendor)");
			else if (cdb0 >= 0x60 && cdb0 < 0x7e)
				off += scnprintf(buffer + off, buf_len - off,
						 " (reserved)");
		}
	} else {
		if (sa_name)
			off = scnprintf(buffer, buf_len, "%s", sa_name);
		else if (cdb_name)
			off = scnprintf(buffer, buf_len, "%s, sa=0x%x",
					cdb_name, sa);
		else
			off = scnprintf(buffer, buf_len,
					"opcode=0x%x, sa=0x%x", cdb0, sa);
	}
	WARN_ON(off >= buf_len);
	return off;
}

size_t __scsi_format_command(char *logbuf, size_t logbuf_len,
			     const unsigned char *cdb, size_t cdb_len)
{
	int len, k;
	size_t off;

	off = scsi_format_opcode_name(logbuf, logbuf_len, cdb);
	if (off >= logbuf_len)
		return off;
	len = scsi_command_size(cdb);
	if (cdb_len < len)
		len = cdb_len;
	/* print out all bytes in cdb */
	for (k = 0; k < len; ++k) {
		if (off > logbuf_len - 3)
			break;
		off += scnprintf(logbuf + off, logbuf_len - off,
				 " %02x", cdb[k]);
	}
	return off;
}
EXPORT_SYMBOL(__scsi_format_command);

void scsi_print_command(struct scsi_cmnd *cmd)
{
	int k;
	char *logbuf;
	size_t off, logbuf_len;

	if (!cmd->cmnd)
		return;

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;

	off = sdev_format_header(logbuf, logbuf_len,
				 scmd_name(cmd), cmd->request->tag);
	if (off >= logbuf_len)
		goto out_printk;
	off += scnprintf(logbuf + off, logbuf_len - off, "CDB: ");
	if (WARN_ON(off >= logbuf_len))
		goto out_printk;

	off += scsi_format_opcode_name(logbuf + off, logbuf_len - off,
				       cmd->cmnd);
	if (off >= logbuf_len)
		goto out_printk;

	/* print out all bytes in cdb */
	if (cmd->cmd_len > 16) {
		/* Print opcode in one line and use separate lines for CDB */
		off += scnprintf(logbuf + off, logbuf_len - off, "\n");
		dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf);
		scsi_log_release_buffer(logbuf);
		for (k = 0; k < cmd->cmd_len; k += 16) {
			size_t linelen = min(cmd->cmd_len - k, 16);

			logbuf = scsi_log_reserve_buffer(&logbuf_len);
			if (!logbuf)
				break;
			off = sdev_format_header(logbuf, logbuf_len,
						 scmd_name(cmd),
						 cmd->request->tag);
			if (!WARN_ON(off > logbuf_len - 58)) {
				off += scnprintf(logbuf + off, logbuf_len - off,
						 "CDB[%02x]: ", k);
				hex_dump_to_buffer(&cmd->cmnd[k], linelen,
						   16, 1, logbuf + off,
						   logbuf_len - off, false);
			}
			dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s",
				   logbuf);
			scsi_log_release_buffer(logbuf);
		}
		return;
	}
	if (!WARN_ON(off > logbuf_len - 49)) {
		off += scnprintf(logbuf + off, logbuf_len - off, " ");
		hex_dump_to_buffer(cmd->cmnd, cmd->cmd_len, 16, 1,
				   logbuf + off, logbuf_len - off,
				   false);
	}
out_printk:
	dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf);
	scsi_log_release_buffer(logbuf);
}
EXPORT_SYMBOL(scsi_print_command);

static size_t
scsi_format_extd_sense(char *buffer, size_t buf_len,
		       unsigned char asc, unsigned char ascq)
{
	size_t off = 0;
	const char *extd_sense_fmt = NULL;
	const char *extd_sense_str = scsi_extd_sense_format(asc, ascq,
							    &extd_sense_fmt);

	if (extd_sense_str) {
		off = scnprintf(buffer, buf_len, "Add. Sense: %s",
				extd_sense_str);
		if (extd_sense_fmt)
			off += scnprintf(buffer + off, buf_len - off,
					 "(%s%x)", extd_sense_fmt, ascq);
	} else {
		if (asc >= 0x80)
			off = scnprintf(buffer, buf_len, "<<vendor>>");
		off += scnprintf(buffer + off, buf_len - off,
				 "ASC=0x%x ", asc);
		if (ascq >= 0x80)
			off += scnprintf(buffer + off, buf_len - off,
					 "<<vendor>>");
		off += scnprintf(buffer + off, buf_len - off,
				 "ASCQ=0x%x ", ascq);
	}
	return off;
}

static size_t
scsi_format_sense_hdr(char *buffer, size_t buf_len,
		      const struct scsi_sense_hdr *sshdr)
{
	const char *sense_txt;
	size_t off;

	off = scnprintf(buffer, buf_len, "Sense Key : ");
	sense_txt = scsi_sense_key_string(sshdr->sense_key);
	if (sense_txt)
		off += scnprintf(buffer + off, buf_len - off,
				 "%s ", sense_txt);
	else
		off += scnprintf(buffer + off, buf_len - off,
				 "0x%x ", sshdr->sense_key);
	off += scnprintf(buffer + off, buf_len - off,
		scsi_sense_is_deferred(sshdr) ? "[deferred] " : "[current] ");

	if (sshdr->response_code >= 0x72)
		off += scnprintf(buffer + off, buf_len - off, "[descriptor] ");
	return off;
}

static void
scsi_log_dump_sense(const struct scsi_device *sdev, const char *name, int tag,
		    const unsigned char *sense_buffer, int sense_len)
{
	char *logbuf;
	size_t logbuf_len;
	int i;

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;

	for (i = 0; i < sense_len; i += 16) {
		int len = min(sense_len - i, 16);
		size_t off;

		off = sdev_format_header(logbuf, logbuf_len,
					 name, tag);
		hex_dump_to_buffer(&sense_buffer[i], len, 16, 1,
				   logbuf + off, logbuf_len - off,
				   false);
		dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf);
	}
	scsi_log_release_buffer(logbuf);
}

static void
scsi_log_print_sense_hdr(const struct scsi_device *sdev, const char *name,
			 int tag, const struct scsi_sense_hdr *sshdr)
{
	char *logbuf;
	size_t off, logbuf_len;

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;
	off = sdev_format_header(logbuf, logbuf_len, name, tag);
	off += scsi_format_sense_hdr(logbuf + off, logbuf_len - off, sshdr);
	dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf);
	scsi_log_release_buffer(logbuf);

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;
	off = sdev_format_header(logbuf, logbuf_len, name, tag);
	off += scsi_format_extd_sense(logbuf + off, logbuf_len - off,
				      sshdr->asc, sshdr->ascq);
	dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf);
	scsi_log_release_buffer(logbuf);
}

static void
scsi_log_print_sense(const struct scsi_device *sdev, const char *name, int tag,
		     const unsigned char *sense_buffer, int sense_len)
{
	struct scsi_sense_hdr sshdr;

	if (scsi_normalize_sense(sense_buffer, sense_len, &sshdr))
		scsi_log_print_sense_hdr(sdev, name, tag, &sshdr);
	else
		scsi_log_dump_sense(sdev, name, tag, sense_buffer, sense_len);
}

/*
 * Print normalized SCSI sense header with a prefix.
 */
void
scsi_print_sense_hdr(const struct scsi_device *sdev, const char *name,
		     const struct scsi_sense_hdr *sshdr)
{
	scsi_log_print_sense_hdr(sdev, name, -1, sshdr);
}
EXPORT_SYMBOL(scsi_print_sense_hdr);

/* Normalize and print sense buffer with name prefix */
void __scsi_print_sense(const struct scsi_device *sdev, const char *name,
			const unsigned char *sense_buffer, int sense_len)
{
	scsi_log_print_sense(sdev, name, -1, sense_buffer, sense_len);
}
EXPORT_SYMBOL(__scsi_print_sense);

/* Normalize and print sense buffer in SCSI command */
void scsi_print_sense(const struct scsi_cmnd *cmd)
{
	scsi_log_print_sense(cmd->device, scmd_name(cmd), cmd->request->tag,
			     cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
}
EXPORT_SYMBOL(scsi_print_sense);

void scsi_print_result(const struct scsi_cmnd *cmd, const char *msg,
		       int disposition)
{
	char *logbuf;
	size_t off, logbuf_len;
	const char *mlret_string = scsi_mlreturn_string(disposition);
	const char *hb_string = scsi_hostbyte_string(cmd->result);
	const char *db_string = scsi_driverbyte_string(cmd->result);
	unsigned long cmd_age = (jiffies - cmd->jiffies_at_alloc) / HZ;

	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	if (!logbuf)
		return;

	off = sdev_format_header(logbuf, logbuf_len,
				 scmd_name(cmd), cmd->request->tag);

	if (off >= logbuf_len)
		goto out_printk;

	if (msg) {
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "%s: ", msg);
		if (WARN_ON(off >= logbuf_len))
			goto out_printk;
	}
	if (mlret_string)
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "%s ", mlret_string);
	else
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "UNKNOWN(0x%02x) ", disposition);
	if (WARN_ON(off >= logbuf_len))
		goto out_printk;

	off += scnprintf(logbuf + off, logbuf_len - off, "Result: ");
	if (WARN_ON(off >= logbuf_len))
		goto out_printk;

	if (hb_string)
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "hostbyte=%s ", hb_string);
	else
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "hostbyte=0x%02x ", host_byte(cmd->result));
	if (WARN_ON(off >= logbuf_len))
		goto out_printk;

	if (db_string)
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "driverbyte=%s ", db_string);
	else
		off += scnprintf(logbuf + off, logbuf_len - off,
				 "driverbyte=0x%02x ",
				 driver_byte(cmd->result));

	off += scnprintf(logbuf + off, logbuf_len - off,
			 "cmd_age=%lus", cmd_age);

out_printk:
	dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf);
	scsi_log_release_buffer(logbuf);
}
EXPORT_SYMBOL(scsi_print_result);
Commit	Line	Data
55716d26	1	// SPDX-License-Identifier: GPL-2.0-only
ded85c19 HR	2	/*
	3	* scsi_logging.c
	4	*
	5	* Copyright (C) 2014 SUSE Linux Products GmbH
	6	* Copyright (C) 2014 Hannes Reinecke <hare@suse.de>
ded85c19 HR	7	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/atomic.h>
	11
	12	#include <scsi/scsi.h>
	13	#include <scsi/scsi_cmnd.h>
	14	#include <scsi/scsi_device.h>
9e5ed2a5	15	#include <scsi/scsi_eh.h>
ded85c19 HR	16	#include <scsi/scsi_dbg.h>
ded85c19 HR	17
ded85c19 HR	18	static char scsi_log_reserve_buffer(size_t len)
ded85c19 HR	19	{
dccc96ab BVA	20	*len = 128;
dccc96ab BVA	21	return kmalloc(*len, GFP_ATOMIC);
ded85c19 HR	22	}
	23
	24	static void scsi_log_release_buffer(char *bufptr)
	25	{
dccc96ab	26	kfree(bufptr);
ded85c19 HR	27	}
ded85c19 HR	28
21045519 HR	29	static inline const char scmd_name(const struct scsi_cmnd scmd)
	30	{
	31	return scmd->request->rq_disk ?
	32	scmd->request->rq_disk->disk_name : NULL;
	33	}
	34
	35	static size_t sdev_format_header(char *logbuf, size_t logbuf_len,
	36	const char *name, int tag)
9e5ed2a5 HR	37	{
	38	size_t off = 0;
	39
21045519	40	if (name)
9e5ed2a5	41	off += scnprintf(logbuf + off, logbuf_len - off,
21045519	42	"[%s] ", name);
9e5ed2a5 HR	43
	44	if (WARN_ON(off >= logbuf_len))
	45	return off;
	46
	47	if (tag >= 0)
	48	off += scnprintf(logbuf + off, logbuf_len - off,
	49	"tag#%d ", tag);
	50	return off;
	51	}
	52
9c4a6b1e HR	53	void sdev_prefix_printk(const char level, const struct scsi_device sdev,
9c4a6b1e HR	54	const char name, const char fmt, ...)
ded85c19 HR	55	{
	56	va_list args;
	57	char *logbuf;
	58	size_t off = 0, logbuf_len;
ded85c19 HR	59
ded85c19 HR	60	if (!sdev)
9c4a6b1e	61	return;
ded85c19 HR	62
	63	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	64	if (!logbuf)
9c4a6b1e	65	return;
ded85c19 HR	66
	67	if (name)
	68	off += scnprintf(logbuf + off, logbuf_len - off,
	69	"[%s] ", name);
9e5ed2a5 HR	70	if (!WARN_ON(off >= logbuf_len)) {
	71	va_start(args, fmt);
	72	off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args);
	73	va_end(args);
	74	}
9c4a6b1e	75	dev_printk(level, &sdev->sdev_gendev, "%s", logbuf);
ded85c19	76	scsi_log_release_buffer(logbuf);
ded85c19 HR	77	}
	78	EXPORT_SYMBOL(sdev_prefix_printk);
	79
9c4a6b1e	80	void scmd_printk(const char level, const struct scsi_cmnd scmd,
ded85c19 HR	81	const char *fmt, ...)
ded85c19 HR	82	{
ded85c19 HR	83	va_list args;
	84	char *logbuf;
	85	size_t off = 0, logbuf_len;
ded85c19 HR	86
ded85c19 HR	87	if (!scmd \|\| !scmd->cmnd)
9c4a6b1e	88	return;
ded85c19 HR	89
	90	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	91	if (!logbuf)
9c4a6b1e	92	return;
21045519	93	off = sdev_format_header(logbuf, logbuf_len, scmd_name(scmd),
9e5ed2a5 HR	94	scmd->request->tag);
	95	if (off < logbuf_len) {
	96	va_start(args, fmt);
	97	off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args);
	98	va_end(args);
	99	}
9c4a6b1e	100	dev_printk(level, &scmd->device->sdev_gendev, "%s", logbuf);
ded85c19	101	scsi_log_release_buffer(logbuf);
ded85c19 HR	102	}
ded85c19 HR	103	EXPORT_SYMBOL(scmd_printk);
9e5ed2a5 HR	104
	105	static size_t scsi_format_opcode_name(char *buffer, size_t buf_len,
	106	const unsigned char *cdbp)
	107	{
	108	int sa, cdb0;
	109	const char cdb_name = NULL, sa_name = NULL;
	110	size_t off;
	111
	112	cdb0 = cdbp[0];
	113	if (cdb0 == VARIABLE_LENGTH_CMD) {
	114	int len = scsi_varlen_cdb_length(cdbp);
	115
	116	if (len < 10) {
	117	off = scnprintf(buffer, buf_len,
	118	"short variable length command, len=%d",
	119	len);
	120	return off;
	121	}
	122	sa = (cdbp[8] << 8) + cdbp[9];
	123	} else
	124	sa = cdbp[1] & 0x1f;
	125
	126	if (!scsi_opcode_sa_name(cdb0, sa, &cdb_name, &sa_name)) {
	127	if (cdb_name)
	128	off = scnprintf(buffer, buf_len, "%s", cdb_name);
	129	else {
	130	off = scnprintf(buffer, buf_len, "opcode=0x%x", cdb0);
	131	if (WARN_ON(off >= buf_len))
	132	return off;
	133	if (cdb0 >= VENDOR_SPECIFIC_CDB)
	134	off += scnprintf(buffer + off, buf_len - off,
	135	" (vendor)");
	136	else if (cdb0 >= 0x60 && cdb0 < 0x7e)
	137	off += scnprintf(buffer + off, buf_len - off,
	138	" (reserved)");
	139	}
	140	} else {
	141	if (sa_name)
	142	off = scnprintf(buffer, buf_len, "%s", sa_name);
	143	else if (cdb_name)
	144	off = scnprintf(buffer, buf_len, "%s, sa=0x%x",
	145	cdb_name, sa);
	146	else
	147	off = scnprintf(buffer, buf_len,
	148	"opcode=0x%x, sa=0x%x", cdb0, sa);
	149	}
	150	WARN_ON(off >= buf_len);
	151	return off;
	152	}
	153
	154	size_t __scsi_format_command(char *logbuf, size_t logbuf_len,
	155	const unsigned char *cdb, size_t cdb_len)
	156	{
	157	int len, k;
	158	size_t off;
	159
	160	off = scsi_format_opcode_name(logbuf, logbuf_len, cdb);
	161	if (off >= logbuf_len)
	162	return off;
	163	len = scsi_command_size(cdb);
	164	if (cdb_len < len)
	165	len = cdb_len;
	166	/* print out all bytes in cdb */
	167	for (k = 0; k < len; ++k) {
168	if (off > logbuf_len - 3)
169	break;
170	off += scnprintf(logbuf + off, logbuf_len - off,
171	" %02x", cdb[k]);
172	}
173	return off;
174	}
175	EXPORT_SYMBOL(__scsi_format_command);
176
177	void scsi_print_command(struct scsi_cmnd *cmd)
178	{
9e5ed2a5 HR	179	int k;
	180	char *logbuf;
	181	size_t off, logbuf_len;
	182
	183	if (!cmd->cmnd)
	184	return;
	185
	186	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	187	if (!logbuf)
	188	return;
	189
21045519 HR	190	off = sdev_format_header(logbuf, logbuf_len,
21045519 HR	191	scmd_name(cmd), cmd->request->tag);
9e5ed2a5 HR	192	if (off >= logbuf_len)
	193	goto out_printk;
	194	off += scnprintf(logbuf + off, logbuf_len - off, "CDB: ");
	195	if (WARN_ON(off >= logbuf_len))
	196	goto out_printk;
	197
	198	off += scsi_format_opcode_name(logbuf + off, logbuf_len - off,
	199	cmd->cmnd);
	200	if (off >= logbuf_len)
	201	goto out_printk;
	202
	203	/* print out all bytes in cdb */
	204	if (cmd->cmd_len > 16) {
	205	/* Print opcode in one line and use separate lines for CDB */
	206	off += scnprintf(logbuf + off, logbuf_len - off, "\n");
2fc583c4	207	dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf);
9e5ed2a5 HR	208	scsi_log_release_buffer(logbuf);
	209	for (k = 0; k < cmd->cmd_len; k += 16) {
	210	size_t linelen = min(cmd->cmd_len - k, 16);
	211
	212	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	213	if (!logbuf)
	214	break;
21045519 HR	215	off = sdev_format_header(logbuf, logbuf_len,
21045519 HR	216	scmd_name(cmd),
9e5ed2a5 HR	217	cmd->request->tag);
	218	if (!WARN_ON(off > logbuf_len - 58)) {
	219	off += scnprintf(logbuf + off, logbuf_len - off,
	220	"CDB[%02x]: ", k);
	221	hex_dump_to_buffer(&cmd->cmnd[k], linelen,
	222	16, 1, logbuf + off,
	223	logbuf_len - off, false);
	224	}
2fc583c4	225	dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s",
9e5ed2a5 HR	226	logbuf);
	227	scsi_log_release_buffer(logbuf);
	228	}
	229	return;
	230	}
	231	if (!WARN_ON(off > logbuf_len - 49)) {
	232	off += scnprintf(logbuf + off, logbuf_len - off, " ");
	233	hex_dump_to_buffer(cmd->cmnd, cmd->cmd_len, 16, 1,
	234	logbuf + off, logbuf_len - off,
	235	false);
	236	}
	237	out_printk:
2fc583c4	238	dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf);
9e5ed2a5 HR	239	scsi_log_release_buffer(logbuf);
	240	}
	241	EXPORT_SYMBOL(scsi_print_command);
21045519 HR	242
	243	static size_t
	244	scsi_format_extd_sense(char *buffer, size_t buf_len,
	245	unsigned char asc, unsigned char ascq)
	246	{
	247	size_t off = 0;
	248	const char *extd_sense_fmt = NULL;
	249	const char *extd_sense_str = scsi_extd_sense_format(asc, ascq,
	250	&extd_sense_fmt);
	251
	252	if (extd_sense_str) {
	253	off = scnprintf(buffer, buf_len, "Add. Sense: %s",
	254	extd_sense_str);
	255	if (extd_sense_fmt)
	256	off += scnprintf(buffer + off, buf_len - off,
	257	"(%s%x)", extd_sense_fmt, ascq);
	258	} else {
	259	if (asc >= 0x80)
	260	off = scnprintf(buffer, buf_len, "<<vendor>>");
	261	off += scnprintf(buffer + off, buf_len - off,
	262	"ASC=0x%x ", asc);
	263	if (ascq >= 0x80)
	264	off += scnprintf(buffer + off, buf_len - off,
	265	"<<vendor>>");
	266	off += scnprintf(buffer + off, buf_len - off,
	267	"ASCQ=0x%x ", ascq);
	268	}
	269	return off;
	270	}
	271
	272	static size_t
	273	scsi_format_sense_hdr(char *buffer, size_t buf_len,
	274	const struct scsi_sense_hdr *sshdr)
	275	{
	276	const char *sense_txt;
	277	size_t off;
	278
	279	off = scnprintf(buffer, buf_len, "Sense Key : ");
	280	sense_txt = scsi_sense_key_string(sshdr->sense_key);
	281	if (sense_txt)
	282	off += scnprintf(buffer + off, buf_len - off,
	283	"%s ", sense_txt);
	284	else
	285	off += scnprintf(buffer + off, buf_len - off,
	286	"0x%x ", sshdr->sense_key);
	287	off += scnprintf(buffer + off, buf_len - off,
	288	scsi_sense_is_deferred(sshdr) ? "[deferred] " : "[current] ");
	289
	290	if (sshdr->response_code >= 0x72)
	291	off += scnprintf(buffer + off, buf_len - off, "[descriptor] ");
	292	return off;
	293	}
	294
	295	static void
	296	scsi_log_dump_sense(const struct scsi_device sdev, const char name, int tag,
	297	const unsigned char *sense_buffer, int sense_len)
	298	{
	299	char *logbuf;
	300	size_t logbuf_len;
	301	int i;
	302
	303	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	304	if (!logbuf)
	305	return;
306
307	for (i = 0; i < sense_len; i += 16) {
308	int len = min(sense_len - i, 16);
309	size_t off;
310
311	off = sdev_format_header(logbuf, logbuf_len,
312	name, tag);
313	hex_dump_to_buffer(&sense_buffer[i], len, 16, 1,
314	logbuf + off, logbuf_len - off,
315	false);
2fc583c4	316	dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf);
21045519 HR	317	}
	318	scsi_log_release_buffer(logbuf);
	319	}
	320
	321	static void
	322	scsi_log_print_sense_hdr(const struct scsi_device sdev, const char name,
	323	int tag, const struct scsi_sense_hdr *sshdr)
	324	{
	325	char *logbuf;
	326	size_t off, logbuf_len;
	327
	328	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	329	if (!logbuf)
	330	return;
	331	off = sdev_format_header(logbuf, logbuf_len, name, tag);
	332	off += scsi_format_sense_hdr(logbuf + off, logbuf_len - off, sshdr);
2fc583c4	333	dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf);
21045519 HR	334	scsi_log_release_buffer(logbuf);
	335
	336	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	337	if (!logbuf)
	338	return;
	339	off = sdev_format_header(logbuf, logbuf_len, name, tag);
	340	off += scsi_format_extd_sense(logbuf + off, logbuf_len - off,
	341	sshdr->asc, sshdr->ascq);
2fc583c4	342	dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf);
21045519 HR	343	scsi_log_release_buffer(logbuf);
	344	}
	345
	346	static void
	347	scsi_log_print_sense(const struct scsi_device sdev, const char name, int tag,
	348	const unsigned char *sense_buffer, int sense_len)
	349	{
	350	struct scsi_sense_hdr sshdr;
	351
	352	if (scsi_normalize_sense(sense_buffer, sense_len, &sshdr))
	353	scsi_log_print_sense_hdr(sdev, name, tag, &sshdr);
	354	else
	355	scsi_log_dump_sense(sdev, name, tag, sense_buffer, sense_len);
	356	}
	357
	358	/*
	359	* Print normalized SCSI sense header with a prefix.
	360	*/
	361	void
	362	scsi_print_sense_hdr(const struct scsi_device sdev, const char name,
	363	const struct scsi_sense_hdr *sshdr)
	364	{
	365	scsi_log_print_sense_hdr(sdev, name, -1, sshdr);
	366	}
	367	EXPORT_SYMBOL(scsi_print_sense_hdr);
	368
	369	/* Normalize and print sense buffer with name prefix */
	370	void __scsi_print_sense(const struct scsi_device sdev, const char name,
	371	const unsigned char *sense_buffer, int sense_len)
	372	{
	373	scsi_log_print_sense(sdev, name, -1, sense_buffer, sense_len);
	374	}
	375	EXPORT_SYMBOL(__scsi_print_sense);
	376
	377	/* Normalize and print sense buffer in SCSI command */
	378	void scsi_print_sense(const struct scsi_cmnd *cmd)
	379	{
	380	scsi_log_print_sense(cmd->device, scmd_name(cmd), cmd->request->tag,
	381	cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
	382	}
	383	EXPORT_SYMBOL(scsi_print_sense);
026f8da8 HR	384
	385	void scsi_print_result(const struct scsi_cmnd cmd, const char msg,
	386	int disposition)
	387	{
	388	char *logbuf;
	389	size_t off, logbuf_len;
	390	const char *mlret_string = scsi_mlreturn_string(disposition);
	391	const char *hb_string = scsi_hostbyte_string(cmd->result);
	392	const char *db_string = scsi_driverbyte_string(cmd->result);
8ee132b3	393	unsigned long cmd_age = (jiffies - cmd->jiffies_at_alloc) / HZ;
026f8da8 HR	394
	395	logbuf = scsi_log_reserve_buffer(&logbuf_len);
	396	if (!logbuf)
	397	return;
	398
	399	off = sdev_format_header(logbuf, logbuf_len,
	400	scmd_name(cmd), cmd->request->tag);
	401
	402	if (off >= logbuf_len)
	403	goto out_printk;
	404
	405	if (msg) {
	406	off += scnprintf(logbuf + off, logbuf_len - off,
	407	"%s: ", msg);
	408	if (WARN_ON(off >= logbuf_len))
	409	goto out_printk;
	410	}
	411	if (mlret_string)
	412	off += scnprintf(logbuf + off, logbuf_len - off,
	413	"%s ", mlret_string);
	414	else
	415	off += scnprintf(logbuf + off, logbuf_len - off,
	416	"UNKNOWN(0x%02x) ", disposition);
	417	if (WARN_ON(off >= logbuf_len))
	418	goto out_printk;
	419
	420	off += scnprintf(logbuf + off, logbuf_len - off, "Result: ");
	421	if (WARN_ON(off >= logbuf_len))
	422	goto out_printk;
	423
	424	if (hb_string)
	425	off += scnprintf(logbuf + off, logbuf_len - off,
	426	"hostbyte=%s ", hb_string);
	427	else
	428	off += scnprintf(logbuf + off, logbuf_len - off,
	429	"hostbyte=0x%02x ", host_byte(cmd->result));
	430	if (WARN_ON(off >= logbuf_len))
	431	goto out_printk;
	432
	433	if (db_string)
	434	off += scnprintf(logbuf + off, logbuf_len - off,
8ee132b3	435	"driverbyte=%s ", db_string);
026f8da8 HR	436	else
026f8da8 HR	437	off += scnprintf(logbuf + off, logbuf_len - off,
8ee132b3 MG	438	"driverbyte=0x%02x ",
	439	driver_byte(cmd->result));
	440
	441	off += scnprintf(logbuf + off, logbuf_len - off,
	442	"cmd_age=%lus", cmd_age);
	443
026f8da8	444	out_printk:
2fc583c4	445	dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf);
026f8da8 HR	446	scsi_log_release_buffer(logbuf);
	447	}
	448	EXPORT_SYMBOL(scsi_print_result);