[PATCH 02/50] core: Use blk_req() instead of scsi_cmnd.request

Bart Van Assche
2021-05-14T21:34:16Z

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/scsi.c | 2 +-
drivers/scsi/scsi_error.c | 14 +++++++-------
drivers/scsi/scsi_lib.c | 26 +++++++++++++-------------
drivers/scsi/scsi_logging.c | 18 ++++++++++--------
include/scsi/scsi_cmnd.h | 4 ++--
include/scsi/scsi_device.h | 16 +++++++++-------
6 files changed, 42 insertions(+), 38 deletions(-)

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index e9e2f0e15ac8..a226f2d380a3 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -197,7 +197,7 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
"(result %x)\n", cmd->result));

good_bytes = scsi_bufflen(cmd);
- if (!blk_rq_is_passthrough(cmd->request)) {
+ if (!blk_rq_is_passthrough(blk_req(cmd))) {
int old_good_bytes = good_bytes;
drv = scsi_cmd_to_driver(cmd);
if (drv->done)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index d8fafe77dbbe..8846e5066f92 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -242,7 +242,7 @@ scsi_abort_command(struct scsi_cmnd *scmd)
*/
static void scsi_eh_reset(struct scsi_cmnd *scmd)
{
- if (!blk_rq_is_passthrough(scmd->request)) {
+ if (!blk_rq_is_passthrough(blk_req(scmd))) {
struct scsi_driver *sdrv = scsi_cmd_to_driver(scmd);
if (sdrv->eh_reset)
sdrv->eh_reset(scmd);
@@ -1188,7 +1188,7 @@ static enum scsi_disposition scsi_request_sense(struct scsi_cmnd *scmd)
static enum scsi_disposition
scsi_eh_action(struct scsi_cmnd *scmd, enum scsi_disposition rtn)
{
- if (!blk_rq_is_passthrough(scmd->request)) {
+ if (!blk_rq_is_passthrough(blk_req(scmd))) {
struct scsi_driver *sdrv = scsi_cmd_to_driver(scmd);
if (sdrv->eh_action)
rtn = sdrv->eh_action(scmd, rtn);
@@ -1762,16 +1762,16 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
case DID_TIME_OUT:
goto check_type;
case DID_BUS_BUSY:
- return (scmd->request->cmd_flags & REQ_FAILFAST_TRANSPORT);
+ return blk_req(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT;
case DID_PARITY:
- return (scmd->request->cmd_flags & REQ_FAILFAST_DEV);
+ return blk_req(scmd)->cmd_flags & REQ_FAILFAST_DEV;
case DID_ERROR:
if (msg_byte(scmd->result) == COMMAND_COMPLETE &&
status_byte(scmd->result) == RESERVATION_CONFLICT)
return 0;
fallthrough;
case DID_SOFT_ERROR:
- return (scmd->request->cmd_flags & REQ_FAILFAST_DRIVER);
+ return blk_req(scmd)->cmd_flags & REQ_FAILFAST_DRIVER;
}

if (status_byte(scmd->result) != CHECK_CONDITION)
@@ -1782,8 +1782,8 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
* assume caller has checked sense and determined
* the check condition was retryable.
*/
- if (scmd->request->cmd_flags & REQ_FAILFAST_DEV ||
- blk_rq_is_passthrough(scmd->request))
+ if (blk_req(scmd)->cmd_flags & REQ_FAILFAST_DEV ||
+ blk_rq_is_passthrough(blk_req(scmd)))
return 1;

return 0;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 532304d42f00..e88ce8f747ee 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -119,13 +119,13 @@ scsi_set_blocked(struct scsi_cmnd *cmd, int reason)

static void scsi_mq_requeue_cmd(struct scsi_cmnd *cmd)
{
- if (cmd->request->rq_flags & RQF_DONTPREP) {
- cmd->request->rq_flags &= ~RQF_DONTPREP;
+ if (blk_req(cmd)->rq_flags & RQF_DONTPREP) {
+ blk_req(cmd)->rq_flags &= ~RQF_DONTPREP;
scsi_mq_uninit_cmd(cmd);
} else {
WARN_ON_ONCE(true);
}
- blk_mq_requeue_request(cmd->request, true);
+ blk_mq_requeue_request(blk_req(cmd), true);
}

/**
@@ -164,7 +164,7 @@ static void __scsi_queue_insert(struct scsi_cmnd *cmd, int reason, bool unbusy)
*/
cmd->result = 0;

- blk_mq_requeue_request(cmd->request, true);
+ blk_mq_requeue_request(blk_req(cmd), true);
}

/**
@@ -475,7 +475,7 @@ void scsi_run_host_queues(struct Scsi_Host *shost)

static void scsi_uninit_cmd(struct scsi_cmnd *cmd)
{
- if (!blk_rq_is_passthrough(cmd->request)) {
+ if (!blk_rq_is_passthrough(blk_req(cmd))) {
struct scsi_driver *drv = scsi_cmd_to_driver(cmd);

if (drv->uninit_command)
@@ -626,7 +626,7 @@ static void scsi_io_completion_reprep(struct scsi_cmnd *cmd,

static bool scsi_cmd_runtime_exceeced(struct scsi_cmnd *cmd)
{
- struct request *req = cmd->request;
+ struct request *req = blk_req(cmd);
unsigned long wait_for;

if (cmd->allowed == SCSI_CMD_RETRIES_NO_LIMIT)
@@ -645,7 +645,7 @@ static bool scsi_cmd_runtime_exceeced(struct scsi_cmnd *cmd)
static void scsi_io_completion_action(struct scsi_cmnd *cmd, int result)
{
struct request_queue *q = cmd->device->request_queue;
- struct request *req = cmd->request;
+ struct request *req = blk_req(cmd);
int level = 0;
enum {ACTION_FAIL, ACTION_REPREP, ACTION_RETRY,
ACTION_DELAYED_RETRY} action;
@@ -819,7 +819,7 @@ static int scsi_io_completion_nz_result(struct scsi_cmnd *cmd, int result,
{
bool sense_valid;
bool sense_current = true; /* false implies "deferred sense" */
- struct request *req = cmd->request;
+ struct request *req = blk_req(cmd);
struct scsi_sense_hdr sshdr;

sense_valid = scsi_command_normalize_sense(cmd, &sshdr);
@@ -908,7 +908,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
{
int result = cmd->result;
struct request_queue *q = cmd->device->request_queue;
- struct request *req = cmd->request;
+ struct request *req = blk_req(cmd);
blk_status_t blk_stat = BLK_STS_OK;

if (unlikely(result)) /* a nz result may or may not be an error */
@@ -979,7 +979,7 @@ static inline bool scsi_cmd_needs_dma_drain(struct scsi_device *sdev,
blk_status_t scsi_alloc_sgtables(struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
- struct request *rq = cmd->request;
+ struct request *rq = blk_req(cmd);
unsigned short nr_segs = blk_rq_nr_phys_segments(rq);
struct scatterlist *last_sg = NULL;
blk_status_t ret;
@@ -1108,7 +1108,7 @@ void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd)
{
void *buf = cmd->sense_buffer;
void *prot = cmd->prot_sdb;
- struct request *rq = blk_mq_rq_from_pdu(cmd);
+ struct request *rq = blk_req(cmd);
unsigned int flags = cmd->flags & SCMD_PRESERVED_FLAGS;
unsigned long jiffies_at_alloc;
int retries, to_clear;
@@ -1573,12 +1573,12 @@ static blk_status_t scsi_prepare_cmd(struct request *req)

static void scsi_mq_done(struct scsi_cmnd *cmd)
{
- if (unlikely(blk_should_fake_timeout(cmd->request->q)))
+ if (unlikely(blk_should_fake_timeout(blk_req(cmd)->q)))
return;
if (unlikely(test_and_set_bit(SCMD_STATE_COMPLETE, &cmd->state)))
return;
trace_scsi_dispatch_cmd_done(cmd);
- blk_mq_complete_request(cmd->request);
+ blk_mq_complete_request(blk_req(cmd));
}

static void scsi_mq_put_budget(struct request_queue *q, int budget_token)
diff --git a/drivers/scsi/scsi_logging.c b/drivers/scsi/scsi_logging.c
index 8ea44c6595ef..706986e7f5ef 100644
--- a/drivers/scsi/scsi_logging.c
+++ b/drivers/scsi/scsi_logging.c
@@ -28,8 +28,9 @@ static void scsi_log_release_buffer(char *bufptr)

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

static size_t sdev_format_header(char *logbuf, size_t logbuf_len,
@@ -91,7 +92,7 @@ void scmd_printk(const char *level, const struct scsi_cmnd *scmd,
if (!logbuf)
return;
off = sdev_format_header(logbuf, logbuf_len, scmd_name(scmd),
- scmd->request->tag);
+ blk_req((struct scsi_cmnd *)scmd)->tag);
if (off < logbuf_len) {
va_start(args, fmt);
off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args);
@@ -188,7 +189,7 @@ void scsi_print_command(struct scsi_cmnd *cmd)
return;

off = sdev_format_header(logbuf, logbuf_len,
- scmd_name(cmd), cmd->request->tag);
+ scmd_name(cmd), blk_req(cmd)->tag);
if (off >= logbuf_len)
goto out_printk;
off += scnprintf(logbuf + off, logbuf_len - off, "CDB: ");
@@ -210,7 +211,7 @@ void scsi_print_command(struct scsi_cmnd *cmd)

off = sdev_format_header(logbuf, logbuf_len,
scmd_name(cmd),
- cmd->request->tag);
+ blk_req(cmd)->tag);
if (!WARN_ON(off > logbuf_len - 58)) {
off += scnprintf(logbuf + off, logbuf_len - off,
"CDB[%02x]: ", k);
@@ -373,7 +374,8 @@ 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,
+ scsi_log_print_sense(cmd->device, scmd_name(cmd),
+ blk_req((struct scsi_cmnd *)cmd)->tag,
cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
}
EXPORT_SYMBOL(scsi_print_sense);
@@ -392,8 +394,8 @@ void scsi_print_result(const struct scsi_cmnd *cmd, const char *msg,
if (!logbuf)
return;

- off = sdev_format_header(logbuf, logbuf_len,
- scmd_name(cmd), cmd->request->tag);
+ off = sdev_format_header(logbuf, logbuf_len, scmd_name(cmd),
+ blk_req((struct scsi_cmnd *)cmd)->tag);

if (off >= logbuf_len)
goto out_printk;
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index f5825be7ee76..a68521e6ce57 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -164,7 +164,7 @@ static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd)
/* make sure not to use it with passthrough commands */
static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd)
{
- return *(struct scsi_driver **)cmd->request->rq_disk->private_data;
+ return *(struct scsi_driver **)blk_req(cmd)->rq_disk->private_data;
}

extern void scsi_finish_command(struct scsi_cmnd *cmd);
@@ -290,7 +290,7 @@ static inline unsigned char scsi_get_prot_type(struct scsi_cmnd *scmd)

static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
{
- return blk_rq_pos(scmd->request);
+ return blk_rq_pos(blk_req(scmd));
}

static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index ac6ab16abee7..2614e4a6a01e 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -265,13 +265,15 @@ sdev_prefix_printk(const char *, const struct scsi_device *, const char *,
__printf(3, 4) void
scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...);

-#define scmd_dbg(scmd, fmt, a...) \
- do { \
- if ((scmd)->request->rq_disk) \
- sdev_dbg((scmd)->device, "[%s] " fmt, \
- (scmd)->request->rq_disk->disk_name, ##a);\
- else \
- sdev_dbg((scmd)->device, fmt, ##a); \
+#define scmd_dbg(scmd, fmt, a...) \
+ do { \
+ struct request *rq = blk_req((scmd)); \
+ \
+ if (rq->rq_disk) \
+ sdev_dbg((scmd)->device, "[%s] " fmt, \
+ rq->rq_disk->disk_name, ##a); \
+ else \
+ sdev_dbg((scmd)->device, fmt, ##a); \
} while (0)

enum scsi_target_state {