Fix synchronicity for ZVOLs.
zvol_write() assumes that the write request must be written to stable storage
if rq_is_sync() is true. Unfortunately, this assumption is incorrect. Indeed,
"sync" does *not* mean what we think it means in the context of the Linux
block layer. This is well explained in linux/fs.h:
WRITE: A normal async write. Device will be plugged.
WRITE_SYNC: Synchronous write. Identical to WRITE, but passes down
the hint that someone will be waiting on this IO
shortly.
WRITE_FLUSH: Like WRITE_SYNC but with preceding cache flush.
WRITE_FUA: Like WRITE_SYNC but data is guaranteed to be on
non-volatile media on completion.
In other words, SYNC does not *mean* that the write must be on stable storage
on completion. It just means that someone is waiting on us to complete the
write request. Thus triggering a ZIL commit for each SYNC write request on a
ZVOL is unnecessary and harmful for performance. To make matters worse, ZVOL
users have no way to express that they actually want data to be written to
stable storage, which means the ZIL is broken for ZVOLs.
The request for stable storage is expressed by the FUA flag, so we must
commit the ZIL after the write if the FUA flag is set. In addition, we must
commit the ZIL before the write if the FLUSH flag is set.
Also, we must inform the block layer that we actually support FLUSH and FUA.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Etienne Dechamps
Brian Behlendorf
parent
56c34bac44
commit
b18019d2d8
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@ -72,6 +72,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -52,6 +52,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -52,6 +52,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -52,6 +52,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -52,6 +52,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -52,6 +52,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -52,6 +52,7 @@ am__aclocal_m4_deps = \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
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$(top_srcdir)/config/kernel-blk-end-request.m4 \
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$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
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$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
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$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
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$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
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$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
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@ -0,0 +1,46 @@
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dnl #
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dnl # 2.6.36 API change
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dnl # In 2.6.36 kernels the blk_queue_ordered() interface has been
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dnl # replaced by the simpler blk_queue_flush(). However, while the
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dnl # old interface was available to all the new one is GPL-only.
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dnl # Thus in addition to detecting if this function is available
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dnl # we determine if it is GPL-only. If the GPL-only interface is
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dnl # there we implement our own compatibility function, otherwise
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dnl # we use the function. The hope is that long term this function
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dnl # will be opened up.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLUSH], [
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AC_MSG_CHECKING([whether blk_queue_flush() is available])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blkdev.h>
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],[
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struct request_queue *q = NULL;
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(void) blk_queue_flush(q, REQ_FLUSH);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLK_QUEUE_FLUSH, 1,
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[blk_queue_flush() is available])
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],[
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AC_MSG_RESULT(no)
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])
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AC_MSG_CHECKING([whether blk_queue_flush() is GPL-only])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/module.h>
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#include <linux/blkdev.h>
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MODULE_LICENSE("CDDL");
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],[
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struct request_queue *q = NULL;
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(void) blk_queue_flush(q, REQ_FLUSH);
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],[
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AC_MSG_RESULT(no)
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLK_QUEUE_FLUSH_GPL_ONLY, 1,
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[blk_queue_flush() is GPL-only])
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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@ -21,6 +21,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
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ZFS_AC_KERNEL_BIO_RW_SYNCIO
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ZFS_AC_KERNEL_REQ_SYNC
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ZFS_AC_KERNEL_BLK_END_REQUEST
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ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
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ZFS_AC_KERNEL_BLK_FETCH_REQUEST
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ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
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ZFS_AC_KERNEL_BLK_RQ_BYTES
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@ -13667,6 +13667,143 @@ _ACEOF
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fi
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rm -Rf build
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EXTRA_KCFLAGS="$tmp_flags"
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{ $as_echo "$as_me:$LINENO: checking whether blk_queue_flush() is available" >&5
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$as_echo_n "checking whether blk_queue_flush() is available... " >&6; }
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/blkdev.h>
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int
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main (void)
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{
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struct request_queue *q = NULL;
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(void) blk_queue_flush(q, REQ_FLUSH);
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_BLK_QUEUE_FLUSH 1
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_ACEOF
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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{ $as_echo "$as_me:$LINENO: result: no" >&5
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$as_echo "no" >&6; }
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fi
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rm -Rf build
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{ $as_echo "$as_me:$LINENO: checking whether blk_queue_flush() is GPL-only" >&5
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$as_echo_n "checking whether blk_queue_flush() is GPL-only... " >&6; }
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/module.h>
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#include <linux/blkdev.h>
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MODULE_LICENSE("CDDL");
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int
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main (void)
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{
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struct request_queue *q = NULL;
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(void) blk_queue_flush(q, REQ_FLUSH);
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: no" >&5
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$as_echo "no" >&6; }
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_BLK_QUEUE_FLUSH_GPL_ONLY 1
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_ACEOF
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fi
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rm -Rf build
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@ -18863,6 +19000,143 @@ _ACEOF
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fi
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rm -Rf build
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EXTRA_KCFLAGS="$tmp_flags"
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{ $as_echo "$as_me:$LINENO: checking whether blk_queue_flush() is available" >&5
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$as_echo_n "checking whether blk_queue_flush() is available... " >&6; }
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/blkdev.h>
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int
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main (void)
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{
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struct request_queue *q = NULL;
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(void) blk_queue_flush(q, REQ_FLUSH);
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
|
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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|
||||
{ $as_echo "$as_me:$LINENO: result: yes" >&5
|
||||
$as_echo "yes" >&6; }
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_BLK_QUEUE_FLUSH 1
|
||||
_ACEOF
|
||||
|
||||
|
||||
else
|
||||
$as_echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: result: no" >&5
|
||||
$as_echo "no" >&6; }
|
||||
|
||||
|
||||
|
||||
fi
|
||||
|
||||
rm -Rf build
|
||||
|
||||
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: checking whether blk_queue_flush() is GPL-only" >&5
|
||||
$as_echo_n "checking whether blk_queue_flush() is GPL-only... " >&6; }
|
||||
|
||||
|
||||
cat confdefs.h - <<_ACEOF >conftest.c
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/blkdev.h>
|
||||
|
||||
MODULE_LICENSE("CDDL");
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
|
||||
struct request_queue *q = NULL;
|
||||
(void) blk_queue_flush(q, REQ_FLUSH);
|
||||
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
|
||||
_ACEOF
|
||||
|
||||
|
||||
rm -Rf build && mkdir -p build
|
||||
echo "obj-m := conftest.o" >build/Makefile
|
||||
if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
|
||||
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
|
||||
(eval $ac_try) 2>&5
|
||||
ac_status=$?
|
||||
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
|
||||
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
|
||||
(eval $ac_try) 2>&5
|
||||
ac_status=$?
|
||||
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; }; then
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: result: no" >&5
|
||||
$as_echo "no" >&6; }
|
||||
|
||||
else
|
||||
$as_echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: result: yes" >&5
|
||||
$as_echo "yes" >&6; }
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_BLK_QUEUE_FLUSH_GPL_ONLY 1
|
||||
_ACEOF
|
||||
|
||||
|
||||
|
||||
|
||||
fi
|
||||
|
||||
rm -Rf build
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -132,6 +132,23 @@ blk_end_request_x(struct request *req, int error, unsigned int nr_bytes)
|
|||
# endif /* HAVE_BLK_END_REQUEST_GPL_ONLY */
|
||||
#endif /* HAVE_BLK_END_REQUEST */
|
||||
|
||||
/*
|
||||
* 2.6.36 API change,
|
||||
* The blk_queue_flush() interface has replaced blk_queue_ordered()
|
||||
* interface. However, while the old interface was available to all the
|
||||
* new one is GPL-only. Thus if the GPL-only version is detected we
|
||||
* implement our own trivial helper compatibility funcion. The hope is
|
||||
* that long term this function will be opened up.
|
||||
*/
|
||||
#if defined(HAVE_BLK_QUEUE_FLUSH) && defined(HAVE_BLK_QUEUE_FLUSH_GPL_ONLY)
|
||||
#define blk_queue_flush __blk_queue_flush
|
||||
static inline void
|
||||
__blk_queue_flush(struct request_queue *q, unsigned int flags)
|
||||
{
|
||||
q->flush_flags = flags & (REQ_FLUSH | REQ_FUA);
|
||||
}
|
||||
#endif /* HAVE_BLK_QUEUE_FLUSH && HAVE_BLK_QUEUE_FLUSH_GPL_ONLY */
|
||||
|
||||
#ifndef HAVE_BLK_RQ_POS
|
||||
static inline sector_t
|
||||
blk_rq_pos(struct request *req)
|
||||
|
|
@ -345,11 +362,19 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
|
|||
* allow richer semantics to be expressed to the block layer. It is
|
||||
* the block layers responsibility to choose the correct way to
|
||||
* implement these semantics.
|
||||
*
|
||||
* The existence of these flags implies that REQ_FLUSH an REQ_FUA are
|
||||
* defined. Thus we can safely define VDEV_REQ_FLUSH and VDEV_REQ_FUA
|
||||
* compatibility macros.
|
||||
*/
|
||||
#ifdef WRITE_FLUSH_FUA
|
||||
# define VDEV_WRITE_FLUSH_FUA WRITE_FLUSH_FUA
|
||||
# define VDEV_REQ_FLUSH REQ_FLUSH
|
||||
# define VDEV_REQ_FUA REQ_FUA
|
||||
#else
|
||||
# define VDEV_WRITE_FLUSH_FUA WRITE_BARRIER
|
||||
# define VDEV_REQ_FLUSH REQ_HARDBARRIER
|
||||
# define VDEV_REQ_FUA REQ_HARDBARRIER
|
||||
#endif
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -534,6 +534,17 @@ zvol_write(void *arg)
|
|||
dmu_tx_t *tx;
|
||||
rl_t *rl;
|
||||
|
||||
if (req->cmd_flags & VDEV_REQ_FLUSH)
|
||||
zil_commit(zv->zv_zilog, ZVOL_OBJ);
|
||||
|
||||
/*
|
||||
* Some requests are just for flush and nothing else.
|
||||
*/
|
||||
if (size == 0) {
|
||||
blk_end_request(req, 0, size);
|
||||
return;
|
||||
}
|
||||
|
||||
rl = zfs_range_lock(&zv->zv_znode, offset, size, RL_WRITER);
|
||||
|
||||
tx = dmu_tx_create(zv->zv_objset);
|
||||
|
|
@ -550,12 +561,14 @@ zvol_write(void *arg)
|
|||
|
||||
error = dmu_write_req(zv->zv_objset, ZVOL_OBJ, req, tx);
|
||||
if (error == 0)
|
||||
zvol_log_write(zv, tx, offset, size, rq_is_sync(req));
|
||||
zvol_log_write(zv, tx, offset, size,
|
||||
req->cmd_flags & VDEV_REQ_FUA);
|
||||
|
||||
dmu_tx_commit(tx);
|
||||
zfs_range_unlock(rl);
|
||||
|
||||
if (rq_is_sync(req) || zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS)
|
||||
if ((req->cmd_flags & VDEV_REQ_FUA) ||
|
||||
zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS)
|
||||
zil_commit(zv->zv_zilog, ZVOL_OBJ);
|
||||
|
||||
blk_end_request(req, -error, size);
|
||||
|
|
@ -578,6 +591,11 @@ zvol_read(void *arg)
|
|||
int error;
|
||||
rl_t *rl;
|
||||
|
||||
if (size == 0) {
|
||||
blk_end_request(req, 0, size);
|
||||
return;
|
||||
}
|
||||
|
||||
rl = zfs_range_lock(&zv->zv_znode, offset, size, RL_READER);
|
||||
|
||||
error = dmu_read_req(zv->zv_objset, ZVOL_OBJ, req);
|
||||
|
|
@ -627,7 +645,7 @@ zvol_request(struct request_queue *q)
|
|||
while ((req = blk_fetch_request(q)) != NULL) {
|
||||
size = blk_rq_bytes(req);
|
||||
|
||||
if (blk_rq_pos(req) + blk_rq_sectors(req) >
|
||||
if (size != 0 && blk_rq_pos(req) + blk_rq_sectors(req) >
|
||||
get_capacity(zv->zv_disk)) {
|
||||
printk(KERN_INFO
|
||||
"%s: bad access: block=%llu, count=%lu\n",
|
||||
|
|
@ -1062,6 +1080,12 @@ zvol_alloc(dev_t dev, const char *name)
|
|||
if (zv->zv_queue == NULL)
|
||||
goto out_kmem;
|
||||
|
||||
#ifdef HAVE_BLK_QUEUE_FLUSH
|
||||
blk_queue_flush(zv->zv_queue, VDEV_REQ_FLUSH | VDEV_REQ_FUA);
|
||||
#else
|
||||
blk_queue_ordered(zv->zv_queue, QUEUE_ORDERED_DRAIN, NULL);
|
||||
#endif /* HAVE_BLK_QUEUE_FLUSH */
|
||||
|
||||
zv->zv_disk = alloc_disk(ZVOL_MINORS);
|
||||
if (zv->zv_disk == NULL)
|
||||
goto out_queue;
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -49,6 +49,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ am__aclocal_m4_deps = \
|
|||
$(top_srcdir)/config/kernel-bio-rw-syncio.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-end-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-fetch-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-queue-flush.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-requeue-request.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-bytes.m4 \
|
||||
$(top_srcdir)/config/kernel-blk-rq-pos.m4 \
|
||||
|
|
|
|||
|
|
@ -51,6 +51,12 @@
|
|||
/* blk_fetch_request() is available */
|
||||
#undef HAVE_BLK_FETCH_REQUEST
|
||||
|
||||
/* blk_queue_flush() is available */
|
||||
#undef HAVE_BLK_QUEUE_FLUSH
|
||||
|
||||
/* blk_queue_flush() is GPL-only */
|
||||
#undef HAVE_BLK_QUEUE_FLUSH_GPL_ONLY
|
||||
|
||||
/* blk_requeue_request() is available */
|
||||
#undef HAVE_BLK_REQUEUE_REQUEST
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue