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[PATCH] Split struct request ->flags into two parts

Просмотр исходного кода 
Right now ->flags is a bit of a mess: some are request types, and
others are just modifiers. Clean this up by splitting it into
->cmd_type and ->cmd_flags. This allows introduction of generic
Linux block message types, useful for sending generic Linux commands
to block devices.

Signed-off-by: Jens Axboe <axboe@suse.de>
Этот коммит содержится в:
Jens Axboe
2006-08-10 08:44:47 +02:00
коммит произвёл Jens Axboe
родитель 77ed74da26
Коммит 4aff5e2333
39 изменённых файлов: 295 добавлений и 301 удалений
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69
drivers/ide/ide-cd.c
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@@ -372,7 +372,7 @@ static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
{
int log = 0;
if (!sense || !rq || (rq->flags & REQ_QUIET))
if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
return 0;
switch (sense->sense_key) {
@@ -597,7 +597,7 @@ static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq)
struct cdrom_info *cd = drive->driver_data;
ide_init_drive_cmd(rq);
rq->flags = REQ_PC;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->rq_disk = cd->disk;
}
@@ -617,7 +617,7 @@ static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
rq->cmd[0] = GPCMD_REQUEST_SENSE;
rq->cmd[4] = rq->data_len = 18;
rq->flags = REQ_SENSE;
rq->cmd_type = REQ_TYPE_SENSE;
/* NOTE! Save the failed command in "rq->buffer" */
rq->buffer = (void *) failed_command;
@@ -630,10 +630,10 @@ static void cdrom_end_request (ide_drive_t *drive, int uptodate)
struct request *rq = HWGROUP(drive)->rq;
int nsectors = rq->hard_cur_sectors;
if ((rq->flags & REQ_SENSE) && uptodate) {
if (blk_sense_request(rq) && uptodate) {
/*
* For REQ_SENSE, "rq->buffer" points to the original failed
* request
* For REQ_TYPE_SENSE, "rq->buffer" points to the original
* failed request
*/
struct request *failed = (struct request *) rq->buffer;
struct cdrom_info *info = drive->driver_data;
@@ -706,17 +706,17 @@ static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
return 1;
}
if (rq->flags & REQ_SENSE) {
if (blk_sense_request(rq)) {
/* We got an error trying to get sense info
from the drive (probably while trying
to recover from a former error). Just give up. */
rq->flags |= REQ_FAILED;
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, 0);
ide_error(drive, "request sense failure", stat);
return 1;
} else if (rq->flags & (REQ_PC | REQ_BLOCK_PC)) {
} else if (blk_pc_request(rq)) {
/* All other functions, except for READ. */
unsigned long flags;
@@ -724,7 +724,7 @@ static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
* if we have an error, pass back CHECK_CONDITION as the
* scsi status byte
*/
if ((rq->flags & REQ_BLOCK_PC) && !rq->errors)
if (!rq->errors)
rq->errors = SAM_STAT_CHECK_CONDITION;
/* Check for tray open. */
@@ -735,12 +735,12 @@ static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
cdrom_saw_media_change (drive);
/*printk("%s: media changed\n",drive->name);*/
return 0;
} else if (!(rq->flags & REQ_QUIET)) {
} else if (!(rq->cmd_flags & REQ_QUIET)) {
/* Otherwise, print an error. */
ide_dump_status(drive, "packet command error", stat);
}
rq->flags |= REQ_FAILED;
rq->cmd_flags |= REQ_FAILED;
/*
* instead of playing games with moving completions around,
@@ -881,7 +881,7 @@ static int cdrom_timer_expiry(ide_drive_t *drive)
wait = ATAPI_WAIT_PC;
break;
default:
if (!(rq->flags & REQ_QUIET))
if (!(rq->cmd_flags & REQ_QUIET))
printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]);
wait = 0;
break;
@@ -1124,7 +1124,7 @@ static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
if (rq->current_nr_sectors > 0) {
printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n",
drive->name, rq->current_nr_sectors);
rq->flags |= REQ_FAILED;
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, 0);
} else
cdrom_end_request(drive, 1);
@@ -1456,7 +1456,7 @@ static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
printk ("%s: cdrom_pc_intr: data underrun %d\n",
drive->name, pc->buflen);
*/
rq->flags |= REQ_FAILED;
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, 0);
}
return ide_stopped;
@@ -1509,7 +1509,7 @@ static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
rq->data += thislen;
rq->data_len -= thislen;
if (rq->flags & REQ_SENSE)
if (blk_sense_request(rq))
rq->sense_len += thislen;
} else {
confused:
@@ -1517,7 +1517,7 @@ confused:
"appears confused (ireason = 0x%02x). "
"Trying to recover by ending request.\n",
drive->name, ireason);
rq->flags |= REQ_FAILED;
rq->cmd_flags |= REQ_FAILED;
cdrom_end_request(drive, 0);
return ide_stopped;
}
@@ -1546,7 +1546,7 @@ static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive)
struct cdrom_info *info = drive->driver_data;
info->dma = 0;
rq->flags &= ~REQ_FAILED;
rq->cmd_flags &= ~REQ_FAILED;
len = rq->data_len;
/* Start sending the command to the drive. */
@@ -1558,7 +1558,7 @@ static int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
{
struct request_sense sense;
int retries = 10;
unsigned int flags = rq->flags;
unsigned int flags = rq->cmd_flags;
if (rq->sense == NULL)
rq->sense = &sense;
@@ -1567,14 +1567,14 @@ static int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
do {
int error;
unsigned long time = jiffies;
rq->flags = flags;
rq->cmd_flags = flags;
error = ide_do_drive_cmd(drive, rq, ide_wait);
time = jiffies - time;
/* FIXME: we should probably abort/retry or something
* in case of failure */
if (rq->flags & REQ_FAILED) {
if (rq->cmd_flags & REQ_FAILED) {
/* The request failed. Retry if it was due to a unit
attention status
(usually means media was changed). */
@@ -1596,10 +1596,10 @@ static int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
}
/* End of retry loop. */
} while ((rq->flags & REQ_FAILED) && retries >= 0);
} while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
/* Return an error if the command failed. */
return (rq->flags & REQ_FAILED) ? -EIO : 0;
return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
}
/*
@@ -1963,7 +1963,7 @@ static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *info = drive->driver_data;
rq->flags |= REQ_QUIET;
rq->cmd_flags |= REQ_QUIET;
info->dma = 0;
@@ -2023,11 +2023,11 @@ ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
}
info->last_block = block;
return action;
} else if (rq->flags & (REQ_PC | REQ_SENSE)) {
} else if (rq->cmd_type == REQ_TYPE_SENSE) {
return cdrom_do_packet_command(drive);
} else if (rq->flags & REQ_BLOCK_PC) {
} else if (blk_pc_request(rq)) {
return cdrom_do_block_pc(drive, rq);
} else if (rq->flags & REQ_SPECIAL) {
} else if (blk_special_request(rq)) {
/*
* right now this can only be a reset...
*/
@@ -2105,7 +2105,7 @@ static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
req.sense = sense;
req.cmd[0] = GPCMD_TEST_UNIT_READY;
req.flags |= REQ_QUIET;
req.cmd_flags |= REQ_QUIET;
#if ! STANDARD_ATAPI
/* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to
@@ -2207,7 +2207,7 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
req.data = (char *)&capbuf;
req.data_len = sizeof(capbuf);
req.flags |= REQ_QUIET;
req.cmd_flags |= REQ_QUIET;
stat = cdrom_queue_packet_command(drive, &req);
if (stat == 0) {
@@ -2230,7 +2230,7 @@ static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
req.sense = sense;
req.data = buf;
req.data_len = buflen;
req.flags |= REQ_QUIET;
req.cmd_flags |= REQ_QUIET;
req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
req.cmd[6] = trackno;
req.cmd[7] = (buflen >> 8);
@@ -2531,7 +2531,7 @@ static int ide_cdrom_packet(struct cdrom_device_info *cdi,
req.timeout = cgc->timeout;
if (cgc->quiet)
req.flags |= REQ_QUIET;
req.cmd_flags |= REQ_QUIET;
req.sense = cgc->sense;
cgc->stat = cdrom_queue_packet_command(drive, &req);
@@ -2629,7 +2629,8 @@ int ide_cdrom_reset (struct cdrom_device_info *cdi)
int ret;
cdrom_prepare_request(drive, &req);
req.flags = REQ_SPECIAL | REQ_QUIET;
req.cmd_type = REQ_TYPE_SPECIAL;
req.cmd_flags = REQ_QUIET;
ret = ide_do_drive_cmd(drive, &req, ide_wait);
/*
@@ -3116,9 +3117,9 @@ static int ide_cdrom_prep_pc(struct request *rq)
static int ide_cdrom_prep_fn(request_queue_t *q, struct request *rq)
{
if (rq->flags & REQ_CMD)
if (blk_fs_request(rq))
return ide_cdrom_prep_fs(q, rq);
else if (rq->flags & REQ_BLOCK_PC)
else if (blk_pc_request(rq))
return ide_cdrom_prep_pc(rq);
return 0;