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scsi: use per-cpu buffer for formatting sense

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Convert sense buffer logging to use the per-cpu buffer to avoid line
breakup.

Tested-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke
2015-01-08 07:43:46 +01:00
committed by Christoph Hellwig
parent cbba5b0ee4
commit 2104551969
4 changed files with 161 additions and 125 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/scsi/scsi_logging.c
+157 -9
View File
@@ -69,14 +69,20 @@ static void scsi_log_release_buffer(char *bufptr)
preempt_enable();
}
static size_t scmd_format_header(char *logbuf, size_t logbuf_len,
struct gendisk *disk, int tag)
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 (disk)
if (name)
off += scnprintf(logbuf + off, logbuf_len - off,
"[%s] ", disk->disk_name);
"[%s] ", name);
if (WARN_ON(off >= logbuf_len))
return off;
@@ -119,7 +125,6 @@ EXPORT_SYMBOL(sdev_prefix_printk);
int scmd_printk(const char *level, const struct scsi_cmnd *scmd,
const char *fmt, ...)
{
struct gendisk *disk = scmd->request->rq_disk;
va_list args;
char *logbuf;
size_t off = 0, logbuf_len;
@@ -131,7 +136,7 @@ int scmd_printk(const char *level, const struct scsi_cmnd *scmd,
logbuf = scsi_log_reserve_buffer(&logbuf_len);
if (!logbuf)
return 0;
off = scmd_format_header(logbuf, logbuf_len, disk,
off = sdev_format_header(logbuf, logbuf_len, scmd_name(scmd),
scmd->request->tag);
if (off < logbuf_len) {
va_start(args, fmt);
@@ -218,7 +223,6 @@ EXPORT_SYMBOL(__scsi_format_command);
void scsi_print_command(struct scsi_cmnd *cmd)
{
struct gendisk *disk = cmd->request->rq_disk;
int k;
char *logbuf;
size_t off, logbuf_len;
@@ -230,7 +234,8 @@ void scsi_print_command(struct scsi_cmnd *cmd)
if (!logbuf)
return;
off = scmd_format_header(logbuf, logbuf_len, disk, cmd->request->tag);
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: ");
@@ -254,7 +259,8 @@ void scsi_print_command(struct scsi_cmnd *cmd)
logbuf = scsi_log_reserve_buffer(&logbuf_len);
if (!logbuf)
break;
off = scmd_format_header(logbuf, logbuf_len, disk,
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,
@@ -280,3 +286,145 @@ out_printk:
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, 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, 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, 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);