| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 8 May 2009 11:54:15 +0900
From: Tejun Heo <tj@...nel.org>
To: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
linux-ide@...r.kernel.org, rusty@...tcorp.com.au,
James.Bottomley@...senPartnership.com, mike.miller@...com,
donari75@...il.com, paul.clements@...eleye.com, tim@...erelk.net,
Geert.Uytterhoeven@...ycom.com, davem@...emloft.net,
Laurent@...vier.info, jgarzik@...ox.com, jeremy@...source.com,
grant.likely@...retlab.ca, adrian@...en.demon.co.uk,
sfr@...b.auug.org.au, bzolnier@...il.com, petkovbb@...glemail.com,
sshtylyov@...mvista.com, oakad@...oo.com, drzeus@...eus.cx,
dwmw2@...radead.org, Markus.Lidel@...dowconnect.com,
wein@...ibm.com, schwidefsky@...ibm.com, zaitcev@...hat.com,
fujita.tomonori@....ntt.co.jp, axboe@...nel.dk
Cc: Tejun Heo <tj@...nel.org>
Subject: [PATCH 17/18] block: convert to dequeueing model (easy ones)
plat-omap/mailbox, floppy, viocd, mspro_block, i2o_block and
mmc/card/queue are already pretty close to dequeueing model and can be
converted with simple changes. Convert them.
While at it,
* xen-blkfront: !fs check moved downwards to share dequeue call with
normal path.
* mspro_block: __blk_end_request(..., blk_rq_cur_byte()) converted to
__blk_end_request_cur()
* mmc/card/queue: loop of __blk_end_request() converted to
__blk_end_request_all()
[ Impact: dequeue in-flight request ]
Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@...source.com>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Alex Dubov <oakad@...oo.com>
Cc: Markus Lidel <Markus.Lidel@...dowconnect.com>
Cc: Pierre Ossman <drzeus@...eus.cx>
---
arch/arm/plat-omap/mailbox.c | 9 +++++++++
drivers/block/floppy.c | 4 +++-
drivers/block/xen-blkfront.c | 13 +++++++------
drivers/cdrom/viocd.c | 2 ++
drivers/memstick/core/mspro_block.c | 8 +++++---
drivers/message/i2o/i2o_block.c | 6 ++++--
drivers/mmc/card/queue.c | 12 ++++++------
7 files changed, 36 insertions(+), 18 deletions(-)
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index 538ba75..7a1f5c2 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -198,6 +198,8 @@ static void mbox_tx_work(struct work_struct *work)
spin_lock(q->queue_lock);
rq = elv_next_request(q);
+ if (rq)
+ blkdev_dequeue_request(rq);
spin_unlock(q->queue_lock);
if (!rq)
@@ -208,6 +210,9 @@ static void mbox_tx_work(struct work_struct *work)
ret = __mbox_msg_send(mbox, tx_data->msg, tx_data->arg);
if (ret) {
enable_mbox_irq(mbox, IRQ_TX);
+ spin_lock(q->queue_lock);
+ blk_requeue_request(q, rq);
+ spin_unlock(q->queue_lock);
return;
}
@@ -238,6 +243,8 @@ static void mbox_rx_work(struct work_struct *work)
while (1) {
spin_lock_irqsave(q->queue_lock, flags);
rq = elv_next_request(q);
+ if (rq)
+ blkdev_dequeue_request(rq);
spin_unlock_irqrestore(q->queue_lock, flags);
if (!rq)
break;
@@ -345,6 +352,8 @@ omap_mbox_read(struct device *dev, struct device_attribute *attr, char *buf)
while (1) {
spin_lock_irqsave(q->queue_lock, flags);
rq = elv_next_request(q);
+ if (rq)
+ blkdev_dequeue_request(rq);
spin_unlock_irqrestore(q->queue_lock, flags);
if (!rq)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 1e27ed9..e2c70d2 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -931,7 +931,7 @@ static inline void unlock_fdc(void)
del_timer(&fd_timeout);
cont = NULL;
clear_bit(0, &fdc_busy);
- if (elv_next_request(floppy_queue))
+ if (current_req || elv_next_request(floppy_queue))
do_fd_request(floppy_queue);
spin_unlock_irqrestore(&floppy_lock, flags);
wake_up(&fdc_wait);
@@ -2913,6 +2913,8 @@ static void redo_fd_request(void)
spin_lock_irq(floppy_queue->queue_lock);
req = elv_next_request(floppy_queue);
+ if (req)
+ blkdev_dequeue_request(req);
spin_unlock_irq(floppy_queue->queue_lock);
if (!req) {
do_floppy = NULL;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 91fc565..66f8345 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -301,22 +301,23 @@ static void do_blkif_request(struct request_queue *rq)
while ((req = elv_next_request(rq)) != NULL) {
info = req->rq_disk->private_data;
- if (!blk_fs_request(req)) {
- __blk_end_request_cur(req, -EIO);
- continue;
- }
if (RING_FULL(&info->ring))
goto wait;
+ blkdev_dequeue_request(req);
+
+ if (!blk_fs_request(req)) {
+ __blk_end_request_all(req, -EIO);
+ continue;
+ }
+
pr_debug("do_blk_req %p: cmd %p, sec %lx, "
"(%u/%u) buffer:%p [%s]\n",
req, req->cmd, (unsigned long)blk_rq_pos(req),
blk_rq_cur_sectors(req), blk_rq_sectors(req),
req->buffer, rq_data_dir(req) ? "write" : "read");
-
- blkdev_dequeue_request(req);
if (blkif_queue_request(req)) {
blk_requeue_request(rq, req);
wait:
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 6e190a9..bbe9f08 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -298,6 +298,8 @@ static void do_viocd_request(struct request_queue *q)
struct request *req;
while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) {
+ blkdev_dequeue_request(req);
+
if (!blk_fs_request(req))
__blk_end_request_all(req, -EIO);
else if (send_request(req) < 0) {
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 93b2c61..58f5be8 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -672,8 +672,7 @@ try_again:
msb->req_sg);
if (!msb->seg_count) {
- chunk = __blk_end_request(msb->block_req, -ENOMEM,
- blk_rq_cur_bytes(msb->block_req));
+ chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
continue;
}
@@ -711,6 +710,7 @@ try_again:
dev_dbg(&card->dev, "issue end\n");
return -EAGAIN;
}
+ blkdev_dequeue_request(msb->block_req);
dev_dbg(&card->dev, "trying again\n");
chunk = 1;
@@ -825,8 +825,10 @@ static void mspro_block_submit_req(struct request_queue *q)
return;
if (msb->eject) {
- while ((req = elv_next_request(q)) != NULL)
+ while ((req = elv_next_request(q)) != NULL) {
+ blkdev_dequeue_request(req);
__blk_end_request_all(req, -ENODEV);
+ }
return;
}
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index e153f5d..8b5cbfc 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -916,8 +916,10 @@ static void i2o_block_request_fn(struct request_queue *q)
blk_stop_queue(q);
break;
}
- } else
- __blk_end_request_cur(req, -EIO);
+ } else {
+ blkdev_dequeue_request(req);
+ __blk_end_request_all(req, -EIO);
+ }
}
};
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 7a72e75..4b70f1e 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -54,8 +54,11 @@ static int mmc_queue_thread(void *d)
spin_lock_irq(q->queue_lock);
set_current_state(TASK_INTERRUPTIBLE);
- if (!blk_queue_plugged(q))
+ if (!blk_queue_plugged(q)) {
req = elv_next_request(q);
+ if (req)
+ blkdev_dequeue_request(req);
+ }
mq->req = req;
spin_unlock_irq(q->queue_lock);
@@ -88,15 +91,12 @@ static void mmc_request(struct request_queue *q)
{
struct mmc_queue *mq = q->queuedata;
struct request *req;
- int ret;
if (!mq) {
printk(KERN_ERR "MMC: killing requests for dead queue\n");
while ((req = elv_next_request(q)) != NULL) {
- do {
- ret = __blk_end_request(req, -EIO,
- blk_rq_cur_bytes(req));
- } while (ret);
+ blkdev_dequeue_request(req);
+ __blk_end_request_all(req, -EIO);
}
return;
}
--
1.6.0.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists