Re: [PATCH Linux 2.6.12-rc5-mm2 01/09] blk: add @uptodate to end_that_request_last() and @error to rq_end_io_fn()
From: Tejun Heo
Date: Sun Jun 05 2005 - 01:02:25 EST
01_blk_add_uptodate_to_end_that_request_last.patch
Add @uptodate argument to end_that_request_last() and @error
to rq_end_io_fn(). There's no generic way to pass error code
to request completion function, making generic error handling
of non-fs request difficult (rq->errors is driver-specific and
each driver uses it differently). This patch adds @uptodate
to end_that_request_last() and @error to rq_end_io_fn().
For fs requests, this doesn't really matter, so just using the
same uptodate argument used in the last call to
end_that_request_first() should suffice. IMHO, this can also
help the generic command-carrying request Jens is working on.
One thing that bothers me is this change can be user-visible
in that additional error codes may be seen by some ioctls.
eg. -EOPNOTSUPP instead of -EIO can be seen with the following
two patches on direct-command ioctls.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
drivers/block/DAC960.c | 2 +-
drivers/block/cciss.c | 2 +-
drivers/block/cpqarray.c | 2 +-
drivers/block/elevator.c | 2 +-
drivers/block/floppy.c | 2 +-
drivers/block/ll_rw_blk.c | 20 ++++++++++++++------
drivers/block/nbd.c | 2 +-
drivers/block/sx8.c | 2 +-
drivers/block/ub.c | 2 +-
drivers/block/viodasd.c | 2 +-
drivers/cdrom/cdu31a.c | 2 +-
drivers/ide/ide-cd.c | 4 ++--
drivers/ide/ide-io.c | 6 +++---
drivers/message/i2o/i2o_block.c | 2 +-
drivers/mmc/mmc_block.c | 4 ++--
drivers/s390/block/dasd.c | 2 +-
drivers/s390/char/tape_block.c | 2 +-
drivers/scsi/ide-scsi.c | 4 ++--
drivers/scsi/scsi_lib.c | 8 ++++----
drivers/scsi/sd.c | 2 +-
include/linux/blkdev.h | 6 +++---
21 files changed, 44 insertions(+), 36 deletions(-)
Index: blk-fixes/drivers/block/DAC960.c
===================================================================
--- blk-fixes.orig/drivers/block/DAC960.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/DAC960.c 2005-06-05 14:53:32.000000000 +0900
@@ -3480,7 +3480,7 @@ static inline boolean DAC960_ProcessComp
if (!end_that_request_first(Request, UpToDate, Command->BlockCount)) {
- end_that_request_last(Request);
+ end_that_request_last(Request, UpToDate);
if (Command->Completion) {
complete(Command->Completion);
Index: blk-fixes/drivers/block/cciss.c
===================================================================
--- blk-fixes.orig/drivers/block/cciss.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/cciss.c 2005-06-05 14:53:32.000000000 +0900
@@ -2072,7 +2072,7 @@ static inline void complete_command( ctl
printk("Done with %p\n", cmd->rq);
#endif /* CCISS_DEBUG */
- end_that_request_last(cmd->rq);
+ end_that_request_last(cmd->rq, status ? 1 : -EIO);
cmd_free(h,cmd,1);
}
Index: blk-fixes/drivers/block/cpqarray.c
===================================================================
--- blk-fixes.orig/drivers/block/cpqarray.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/cpqarray.c 2005-06-05 14:53:32.000000000 +0900
@@ -1036,7 +1036,7 @@ static inline void complete_command(cmdl
complete_buffers(cmd->rq->bio, ok);
DBGPX(printk("Done with %p\n", cmd->rq););
- end_that_request_last(cmd->rq);
+ end_that_request_last(cmd->rq, ok ? 1 : -EIO);
}
/*
Index: blk-fixes/drivers/block/elevator.c
===================================================================
--- blk-fixes.orig/drivers/block/elevator.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/elevator.c 2005-06-05 14:53:32.000000000 +0900
@@ -410,7 +410,7 @@ struct request *elv_next_request(request
blkdev_dequeue_request(rq);
rq->flags |= REQ_QUIET;
end_that_request_chunk(rq, 0, nr_bytes);
- end_that_request_last(rq);
+ end_that_request_last(rq, 0);
} else {
printk(KERN_ERR "%s: bad return=%d\n", __FUNCTION__,
ret);
Index: blk-fixes/drivers/block/floppy.c
===================================================================
--- blk-fixes.orig/drivers/block/floppy.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/floppy.c 2005-06-05 14:53:32.000000000 +0900
@@ -2299,7 +2299,7 @@ static void floppy_end_request(struct re
add_disk_randomness(req->rq_disk);
floppy_off((long)req->rq_disk->private_data);
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
/* We're done with the request */
current_req = NULL;
Index: blk-fixes/drivers/block/ll_rw_blk.c
===================================================================
--- blk-fixes.orig/drivers/block/ll_rw_blk.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/ll_rw_blk.c 2005-06-05 14:53:32.000000000 +0900
@@ -347,7 +347,7 @@ EXPORT_SYMBOL(blk_queue_issue_flush_fn);
/*
* Cache flushing for ordered writes handling
*/
-static void blk_pre_flush_end_io(struct request *flush_rq)
+static void blk_pre_flush_end_io(struct request *flush_rq, int error)
{
struct request *rq = flush_rq->end_io_data;
request_queue_t *q = rq->q;
@@ -363,7 +363,7 @@ static void blk_pre_flush_end_io(struct
}
}
-static void blk_post_flush_end_io(struct request *flush_rq)
+static void blk_post_flush_end_io(struct request *flush_rq, int error)
{
struct request *rq = flush_rq->end_io_data;
request_queue_t *q = rq->q;
@@ -2386,7 +2386,7 @@ EXPORT_SYMBOL(blk_put_request);
* blk_end_sync_rq - executes a completion event on a request
* @rq: request to complete
*/
-void blk_end_sync_rq(struct request *rq)
+void blk_end_sync_rq(struct request *rq, int error)
{
struct completion *waiting = rq->waiting;
@@ -3141,9 +3141,17 @@ EXPORT_SYMBOL(end_that_request_chunk);
/*
* queue lock must be held
*/
-void end_that_request_last(struct request *req)
+void end_that_request_last(struct request *req, int uptodate)
{
struct gendisk *disk = req->rq_disk;
+ int error;
+
+ /*
+ * extend uptodate bool to allow < 0 value to be direct io error
+ */
+ error = 0;
+ if (end_io_error(uptodate))
+ error = !uptodate ? -EIO : uptodate;
if (unlikely(laptop_mode) && blk_fs_request(req))
laptop_io_completion();
@@ -3164,7 +3172,7 @@ void end_that_request_last(struct reques
disk->in_flight--;
}
if (req->end_io)
- req->end_io(req);
+ req->end_io(req, error);
else
__blk_put_request(req->q, req);
}
@@ -3176,7 +3184,7 @@ void end_request(struct request *req, in
if (!end_that_request_first(req, uptodate, req->hard_cur_sectors)) {
add_disk_randomness(req->rq_disk);
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
}
}
Index: blk-fixes/drivers/block/nbd.c
===================================================================
--- blk-fixes.orig/drivers/block/nbd.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/nbd.c 2005-06-05 14:53:32.000000000 +0900
@@ -136,7 +136,7 @@ static void nbd_end_request(struct reque
spin_lock_irqsave(q->queue_lock, flags);
if (!end_that_request_first(req, uptodate, req->nr_sectors)) {
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
}
spin_unlock_irqrestore(q->queue_lock, flags);
}
Index: blk-fixes/drivers/block/sx8.c
===================================================================
--- blk-fixes.orig/drivers/block/sx8.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/sx8.c 2005-06-05 14:53:32.000000000 +0900
@@ -745,7 +745,7 @@ static inline void carm_end_request_queu
rc = end_that_request_first(req, uptodate, req->hard_nr_sectors);
assert(rc == 0);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
rc = carm_put_request(host, crq);
assert(rc == 0);
Index: blk-fixes/drivers/block/ub.c
===================================================================
--- blk-fixes.orig/drivers/block/ub.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/ub.c 2005-06-05 14:53:32.000000000 +0900
@@ -875,7 +875,7 @@ static void ub_end_rq(struct request *rq
rc = end_that_request_first(rq, uptodate, rq->hard_nr_sectors);
// assert(rc == 0);
- end_that_request_last(rq);
+ end_that_request_last(rq, uptodate);
}
/*
Index: blk-fixes/drivers/block/viodasd.c
===================================================================
--- blk-fixes.orig/drivers/block/viodasd.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/block/viodasd.c 2005-06-05 14:53:32.000000000 +0900
@@ -305,7 +305,7 @@ static void viodasd_end_request(struct r
if (end_that_request_first(req, uptodate, num_sectors))
return;
add_disk_randomness(req->rq_disk);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
}
/*
Index: blk-fixes/drivers/cdrom/cdu31a.c
===================================================================
--- blk-fixes.orig/drivers/cdrom/cdu31a.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/cdrom/cdu31a.c 2005-06-05 14:53:32.000000000 +0900
@@ -1402,7 +1402,7 @@ static void do_cdu31a_request(request_qu
if (!end_that_request_first(req, 1, nblock)) {
spin_lock_irq(q->queue_lock);
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, 1);
spin_unlock_irq(q->queue_lock);
}
continue;
Index: blk-fixes/drivers/ide/ide-cd.c
===================================================================
--- blk-fixes.orig/drivers/ide/ide-cd.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/ide/ide-cd.c 2005-06-05 14:53:32.000000000 +0900
@@ -614,7 +614,7 @@ static void cdrom_end_request (ide_drive
*/
spin_lock_irqsave(&ide_lock, flags);
end_that_request_chunk(failed, 0, failed->data_len);
- end_that_request_last(failed);
+ end_that_request_last(failed, 0);
spin_unlock_irqrestore(&ide_lock, flags);
}
@@ -1739,7 +1739,7 @@ end_request:
spin_lock_irqsave(&ide_lock, flags);
blkdev_dequeue_request(rq);
- end_that_request_last(rq);
+ end_that_request_last(rq, 1);
HWGROUP(drive)->rq = NULL;
spin_unlock_irqrestore(&ide_lock, flags);
return ide_stopped;
Index: blk-fixes/drivers/ide/ide-io.c
===================================================================
--- blk-fixes.orig/drivers/ide/ide-io.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/ide/ide-io.c 2005-06-05 14:53:32.000000000 +0900
@@ -89,7 +89,7 @@ int __ide_end_request(ide_drive_t *drive
blkdev_dequeue_request(rq);
HWGROUP(drive)->rq = NULL;
- end_that_request_last(rq);
+ end_that_request_last(rq, uptodate);
ret = 0;
}
return ret;
@@ -247,7 +247,7 @@ static void ide_complete_pm_request (ide
}
blkdev_dequeue_request(rq);
HWGROUP(drive)->rq = NULL;
- end_that_request_last(rq);
+ end_that_request_last(rq, 1);
spin_unlock_irqrestore(&ide_lock, flags);
}
@@ -379,7 +379,7 @@ void ide_end_drive_cmd (ide_drive_t *dri
blkdev_dequeue_request(rq);
HWGROUP(drive)->rq = NULL;
rq->errors = err;
- end_that_request_last(rq);
+ end_that_request_last(rq, !rq->errors);
spin_unlock_irqrestore(&ide_lock, flags);
}
Index: blk-fixes/drivers/message/i2o/i2o_block.c
===================================================================
--- blk-fixes.orig/drivers/message/i2o/i2o_block.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/message/i2o/i2o_block.c 2005-06-05 14:53:32.000000000 +0900
@@ -466,7 +466,7 @@ static void i2o_block_end_request(struct
spin_lock_irqsave(q->queue_lock, flags);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
if (likely(dev)) {
dev->open_queue_depth--;
Index: blk-fixes/drivers/mmc/mmc_block.c
===================================================================
--- blk-fixes.orig/drivers/mmc/mmc_block.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/mmc/mmc_block.c 2005-06-05 14:53:32.000000000 +0900
@@ -254,7 +254,7 @@ static int mmc_blk_issue_rq(struct mmc_q
*/
add_disk_randomness(req->rq_disk);
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, 1);
}
spin_unlock_irq(&md->lock);
} while (ret);
@@ -280,7 +280,7 @@ static int mmc_blk_issue_rq(struct mmc_q
add_disk_randomness(req->rq_disk);
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, 0);
spin_unlock_irq(&md->lock);
return 0;
Index: blk-fixes/drivers/s390/block/dasd.c
===================================================================
--- blk-fixes.orig/drivers/s390/block/dasd.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/s390/block/dasd.c 2005-06-05 14:53:32.000000000 +0900
@@ -1039,7 +1039,7 @@ dasd_end_request(struct request *req, in
if (end_that_request_first(req, uptodate, req->hard_nr_sectors))
BUG();
add_disk_randomness(req->rq_disk);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
}
/*
Index: blk-fixes/drivers/s390/char/tape_block.c
===================================================================
--- blk-fixes.orig/drivers/s390/char/tape_block.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/s390/char/tape_block.c 2005-06-05 14:53:32.000000000 +0900
@@ -78,7 +78,7 @@ tapeblock_end_request(struct request *re
{
if (end_that_request_first(req, uptodate, req->hard_nr_sectors))
BUG();
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
}
static void
Index: blk-fixes/drivers/scsi/ide-scsi.c
===================================================================
--- blk-fixes.orig/drivers/scsi/ide-scsi.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/scsi/ide-scsi.c 2005-06-05 14:53:32.000000000 +0900
@@ -1039,7 +1039,7 @@ static int idescsi_eh_reset (struct scsi
/* kill current request */
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, 0);
if (req->flags & REQ_SENSE)
kfree(scsi->pc->buffer);
kfree(scsi->pc);
@@ -1049,7 +1049,7 @@ static int idescsi_eh_reset (struct scsi
/* now nuke the drive queue */
while ((req = elv_next_request(drive->queue))) {
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, 0);
}
HWGROUP(drive)->rq = NULL;
Index: blk-fixes/drivers/scsi/scsi_lib.c
===================================================================
--- blk-fixes.orig/drivers/scsi/scsi_lib.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/scsi/scsi_lib.c 2005-06-05 14:53:32.000000000 +0900
@@ -258,7 +258,7 @@ static void scsi_wait_done(struct scsi_c
/* This is the end routine we get to if a command was never attached
* to the request. Simply complete the request without changing
* rq_status; this will cause a DRIVER_ERROR. */
-static void scsi_wait_req_end_io(struct request *req)
+static void scsi_wait_req_end_io(struct request *req, int error)
{
BUG_ON(!req->waiting);
@@ -574,7 +574,7 @@ static struct scsi_cmnd *scsi_end_reques
spin_lock_irqsave(q->queue_lock, flags);
if (blk_rq_tagged(req))
blk_queue_end_tag(q, req);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
spin_unlock_irqrestore(q->queue_lock, flags);
/*
@@ -1259,7 +1259,7 @@ static void scsi_kill_requests(request_q
req->flags |= REQ_QUIET;
while (end_that_request_first(req, 0, req->nr_sectors))
;
- end_that_request_last(req);
+ end_that_request_last(req, 0);
}
}
@@ -1314,7 +1314,7 @@ static void scsi_request_fn(struct reque
req->flags |= REQ_QUIET;
while (end_that_request_first(req, 0, req->nr_sectors))
;
- end_that_request_last(req);
+ end_that_request_last(req, 0);
continue;
}
Index: blk-fixes/drivers/scsi/sd.c
===================================================================
--- blk-fixes.orig/drivers/scsi/sd.c 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/drivers/scsi/sd.c 2005-06-05 14:53:32.000000000 +0900
@@ -758,7 +758,7 @@ static void sd_end_flush(request_queue_t
* force journal abort of barriers
*/
end_that_request_first(rq, -EOPNOTSUPP, rq->hard_nr_sectors);
- end_that_request_last(rq);
+ end_that_request_last(rq, -EOPNOTSUPP);
}
}
Index: blk-fixes/include/linux/blkdev.h
===================================================================
--- blk-fixes.orig/include/linux/blkdev.h 2005-06-05 14:50:12.000000000 +0900
+++ blk-fixes/include/linux/blkdev.h 2005-06-05 14:53:32.000000000 +0900
@@ -102,7 +102,7 @@ void copy_io_context(struct io_context *
void swap_io_context(struct io_context **ioc1, struct io_context **ioc2);
struct request;
-typedef void (rq_end_io_fn)(struct request *);
+typedef void (rq_end_io_fn)(struct request *, int);
struct request_list {
int count[2];
@@ -547,7 +547,7 @@ extern void blk_unregister_queue(struct
extern void register_disk(struct gendisk *dev);
extern void generic_make_request(struct bio *bio);
extern void blk_put_request(struct request *);
-extern void blk_end_sync_rq(struct request *rq);
+extern void blk_end_sync_rq(struct request *rq, int error);
extern void blk_attempt_remerge(request_queue_t *, struct request *);
extern struct request *blk_get_request(request_queue_t *, int, int);
extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
@@ -595,7 +595,7 @@ static inline void blk_run_address_space
*/
extern int end_that_request_first(struct request *, int, int);
extern int end_that_request_chunk(struct request *, int, int);
-extern void end_that_request_last(struct request *);
+extern void end_that_request_last(struct request *, int);
extern void end_request(struct request *req, int uptodate);
/*
-
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