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scsi: simplify scsi_log_(send|completion)

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Simplify scsi_log_(send|completion) by externalizing
scsi_mlreturn_string() and always print the command address.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke 2014-10-24 14:27:01 +02:00 committed by Christoph Hellwig
parent ef61329db7
commit c11c004b1c
5 changed files with 57 additions and 44 deletions
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41
drivers/scsi/constants.c
View file

@ -1440,19 +1440,54 @@ const char *scsi_driverbyte_string(int result)
}
EXPORT_SYMBOL(scsi_driverbyte_string);
void scsi_print_result(struct scsi_cmnd *cmd)
#ifdef CONFIG_SCSI_CONSTANTS
#define scsi_mlreturn_name(result) { result, #result }
static const struct value_name_pair scsi_mlreturn_arr[] = {
scsi_mlreturn_name(NEEDS_RETRY),
scsi_mlreturn_name(SUCCESS),
scsi_mlreturn_name(FAILED),
scsi_mlreturn_name(QUEUED),
scsi_mlreturn_name(SOFT_ERROR),
scsi_mlreturn_name(ADD_TO_MLQUEUE),
scsi_mlreturn_name(TIMEOUT_ERROR),
scsi_mlreturn_name(SCSI_RETURN_NOT_HANDLED),
scsi_mlreturn_name(FAST_IO_FAIL)
};
#endif
const char *scsi_mlreturn_string(int result)
{
#ifdef CONFIG_SCSI_CONSTANTS
const struct value_name_pair *arr = scsi_mlreturn_arr;
int k;
for (k = 0; k < ARRAY_SIZE(scsi_mlreturn_arr); ++k, ++arr) {
if (result == arr->value)
return arr->name;
}
#endif
return NULL;
}
EXPORT_SYMBOL(scsi_mlreturn_string);
void scsi_print_result(struct scsi_cmnd *cmd, const char *msg, int disposition)
{
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);
if (hb_string || db_string)
scmd_printk(KERN_INFO, cmd,
"Result: hostbyte=%s driverbyte=%s",
"%s%s Result: hostbyte=%s driverbyte=%s",
msg ? msg : "",
mlret_string ? mlret_string : "UNKNOWN",
hb_string ? hb_string : "invalid",
db_string ? db_string : "invalid");
else
scmd_printk(KERN_INFO, cmd,
"Result: hostbyte=0x%02x driverbyte=0x%02x",
"%s%s Result: hostbyte=0x%02x driverbyte=0x%02x",
msg ? msg : "",
mlret_string ? mlret_string : "UNKNOWN",
host_byte(cmd->result), driver_byte(cmd->result));
}
EXPORT_SYMBOL(scsi_print_result);

43
drivers/scsi/scsi.c
View file

@ -527,9 +527,9 @@ void scsi_log_send(struct scsi_cmnd *cmd)
*
* 1: nothing (match completion)
*
* 2: log opcode + command of all commands
* 2: log opcode + command of all commands + cmd address
*
* 3: same as 2 plus dump cmd address
* 3: same as 2
*
* 4: same as 3 plus dump extra junk
*/
@ -537,10 +537,8 @@ void scsi_log_send(struct scsi_cmnd *cmd)
level = SCSI_LOG_LEVEL(SCSI_LOG_MLQUEUE_SHIFT,
SCSI_LOG_MLQUEUE_BITS);
if (level > 1) {
scmd_printk(KERN_INFO, cmd, "Send: ");
if (level > 2)
printk("0x%p ", cmd);
printk("\n");
scmd_printk(KERN_INFO, cmd,
"Send: scmd 0x%p\n", cmd);
scsi_print_command(cmd);
if (level > 3) {
printk(KERN_INFO "buffer = 0x%p, bufflen = %d,"
@ -565,7 +563,7 @@ void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
*
* 2: same as 1 but for all command completions.
*
* 3: same as 2 plus dump cmd address
* 3: same as 2
*
* 4: same as 3 plus dump extra junk
*/
@ -574,36 +572,7 @@ void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
SCSI_LOG_MLCOMPLETE_BITS);
if (((level > 0) && (cmd->result || disposition != SUCCESS)) ||
(level > 1)) {
scmd_printk(KERN_INFO, cmd, "Done: ");
if (level > 2)
printk("0x%p ", cmd);
/*
* Dump truncated values, so we usually fit within
* 80 chars.
*/
switch (disposition) {
case SUCCESS:
printk("SUCCESS\n");
break;
case NEEDS_RETRY:
printk("RETRY\n");
break;
case ADD_TO_MLQUEUE:
printk("MLQUEUE\n");
break;
case FAILED:
printk("FAILED\n");
break;
case TIMEOUT_ERROR:
/*
* If called via scsi_times_out.
*/
printk("TIMEOUT\n");
break;
default:
printk("UNKNOWN\n");
}
scsi_print_result(cmd);
scsi_print_result(cmd, "Done: ", disposition);
scsi_print_command(cmd);
if (status_byte(cmd->result) & CHECK_CONDITION)
scsi_print_sense(cmd);

13
drivers/scsi/scsi_lib.c
View file

@ -832,7 +832,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
int error = 0;
struct scsi_sense_hdr sshdr;
bool sense_valid = false;
int sense_deferred = 0;
int sense_deferred = 0, level = 0;
enum {ACTION_FAIL, ACTION_REPREP, ACTION_RETRY,
ACTION_DELAYED_RETRY} action;
unsigned long wait_for = (cmd->allowed + 1) * req->timeout;
@ -1038,8 +1038,15 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
switch (action) {
case ACTION_FAIL:
/* Give up and fail the remainder of the request */
if (!(req->cmd_flags & REQ_QUIET)) {
scsi_print_result(cmd);
if (unlikely(scsi_logging_level))
level = SCSI_LOG_LEVEL(SCSI_LOG_MLQUEUE_SHIFT,
SCSI_LOG_MLQUEUE_BITS);
/*
* if logging is enabled the failure will be printed
* in scsi_log_completion(), so avoid duplicate messages
*/
if (!level && !(req->cmd_flags & REQ_QUIET)) {
scsi_print_result(cmd, NULL, FAILED);
if (driver_byte(result) & DRIVER_SENSE)
scsi_print_sense(cmd);
scsi_print_command(cmd);

1
drivers/scsi/scsi_logging.h
View file

@ -51,6 +51,7 @@ do { \
} while (0); \
} while (0)
#else
#define SCSI_LOG_LEVEL(SHIFT, BITS) 0
#define SCSI_CHECK_LOGGING(SHIFT, BITS, LEVEL, CMD)
#endif /* CONFIG_SCSI_LOGGING */

3
include/scsi/scsi_dbg.h
View file

@ -17,9 +17,10 @@ extern void scsi_print_sense(const struct scsi_cmnd *);
extern void __scsi_print_sense(const struct scsi_device *, const char *name,
const unsigned char *sense_buffer,
int sense_len);
extern void scsi_print_result(struct scsi_cmnd *);
extern void scsi_print_result(struct scsi_cmnd *, const char *, int);
extern const char *scsi_hostbyte_string(int);
extern const char *scsi_driverbyte_string(int);
extern const char *scsi_mlreturn_string(int);
extern const char *scsi_sense_key_string(unsigned char);
extern const char *scsi_extd_sense_format(unsigned char, unsigned char,
const char **);