mirror of
https://git.FreeBSD.org/src.git
synced 2024-10-19 02:29:40 +00:00
Linux 2.6.36 compat, synchronous bio flag
The name of the flag used to mark a bio as synchronous has changed again in the 2.6.36 kernel due to the unification of the BIO_RW_* and REQ_* flags. The new flag is called REQ_SYNC. To simplify checking this flag I have introduced the vdev_disk_dio_is_sync() helper function. Based on the results of several new autoconf tests it uses the correct mask to check for a synchronous bio. Preferred interface for flagging a synchronous bio: 2.6.12-2.6.29: BIO_RW_SYNC 2.6.30-2.6.35: BIO_RW_SYNCIO 2.6.36-2.6.xx: REQ_SYNC
This commit is contained in:
Brian Behlendorf
parent
f4af6bb783
commit
675de5aa37
@ -1,7 +1,24 @@
|
||||
dnl #
|
||||
dnl # 2.6.29 API change
|
||||
dnl # BIO_RW_SYNC renamed to BIO_RW_SYNCIO
|
||||
dnl # Preferred interface for flagging a synchronous bio:
|
||||
dnl # 2.6.12-2.6.29: BIO_RW_SYNC
|
||||
dnl # 2.6.30-2.6.35: BIO_RW_SYNCIO
|
||||
dnl # 2.6.36-2.6.xx: REQ_SYNC
|
||||
dnl #
|
||||
AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNC], [
|
||||
AC_MSG_CHECKING([whether BIO_RW_SYNC is defined])
|
||||
ZFS_LINUX_TRY_COMPILE([
|
||||
#include <linux/bio.h>
|
||||
],[
|
||||
int flags;
|
||||
flags = BIO_RW_SYNC;
|
||||
],[
|
||||
AC_MSG_RESULT(yes)
|
||||
AC_DEFINE(HAVE_BIO_RW_SYNC, 1, [BIO_RW_SYNC is defined])
|
||||
],[
|
||||
AC_MSG_RESULT(no)
|
||||
])
|
||||
])
|
||||
|
||||
AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNCIO], [
|
||||
AC_MSG_CHECKING([whether BIO_RW_SYNCIO is defined])
|
||||
ZFS_LINUX_TRY_COMPILE([
|
||||
@ -11,8 +28,22 @@ AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNCIO], [
|
||||
flags = BIO_RW_SYNCIO;
|
||||
],[
|
||||
AC_MSG_RESULT(yes)
|
||||
AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1,
|
||||
[BIO_RW_SYNCIO is defined])
|
||||
AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1, [BIO_RW_SYNCIO is defined])
|
||||
],[
|
||||
AC_MSG_RESULT(no)
|
||||
])
|
||||
])
|
||||
|
||||
AC_DEFUN([ZFS_AC_KERNEL_REQ_SYNC], [
|
||||
AC_MSG_CHECKING([whether REQ_SYNC is defined])
|
||||
ZFS_LINUX_TRY_COMPILE([
|
||||
#include <linux/bio.h>
|
||||
],[
|
||||
int flags;
|
||||
flags = REQ_SYNC;
|
||||
],[
|
||||
AC_MSG_RESULT(yes)
|
||||
AC_DEFINE(HAVE_REQ_SYNC, 1, [REQ_SYNC is defined])
|
||||
],[
|
||||
AC_MSG_RESULT(no)
|
||||
])
|
||||
|
||||
@ -16,7 +16,9 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
|
||||
ZFS_AC_KERNEL_BIO_FAILFAST_DTD
|
||||
ZFS_AC_KERNEL_REQ_FAILFAST_MASK
|
||||
ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
|
||||
ZFS_AC_KERNEL_BIO_RW_SYNC
|
||||
ZFS_AC_KERNEL_BIO_RW_SYNCIO
|
||||
ZFS_AC_KERNEL_REQ_SYNC
|
||||
ZFS_AC_KERNEL_BLK_END_REQUEST
|
||||
ZFS_AC_KERNEL_BLK_FETCH_REQUEST
|
||||
ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
|
||||
|
||||
264
configure
vendored
264
configure
vendored
@ -12884,6 +12884,72 @@ fi
|
||||
EXTRA_KCFLAGS="$tmp_flags"
|
||||
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: checking whether BIO_RW_SYNC is defined" >&5
|
||||
$as_echo_n "checking whether BIO_RW_SYNC is defined... " >&6; }
|
||||
|
||||
|
||||
cat confdefs.h - <<_ACEOF >conftest.c
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
|
||||
|
||||
#include <linux/bio.h>
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
|
||||
int flags;
|
||||
flags = BIO_RW_SYNC;
|
||||
|
||||
;
|
||||
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: yes" >&5
|
||||
$as_echo "yes" >&6; }
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_BIO_RW_SYNC 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 BIO_RW_SYNCIO is defined" >&5
|
||||
$as_echo_n "checking whether BIO_RW_SYNCIO is defined... " >&6; }
|
||||
|
||||
@ -12950,6 +13016,72 @@ fi
|
||||
|
||||
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: checking whether REQ_SYNC is defined" >&5
|
||||
$as_echo_n "checking whether REQ_SYNC is defined... " >&6; }
|
||||
|
||||
|
||||
cat confdefs.h - <<_ACEOF >conftest.c
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
|
||||
|
||||
#include <linux/bio.h>
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
|
||||
int flags;
|
||||
flags = REQ_SYNC;
|
||||
|
||||
;
|
||||
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: yes" >&5
|
||||
$as_echo "yes" >&6; }
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_REQ_SYNC 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_end_request() is available" >&5
|
||||
$as_echo_n "checking whether blk_end_request() is available... " >&6; }
|
||||
|
||||
@ -16087,6 +16219,72 @@ fi
|
||||
EXTRA_KCFLAGS="$tmp_flags"
|
||||
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: checking whether BIO_RW_SYNC is defined" >&5
|
||||
$as_echo_n "checking whether BIO_RW_SYNC is defined... " >&6; }
|
||||
|
||||
|
||||
cat confdefs.h - <<_ACEOF >conftest.c
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
|
||||
|
||||
#include <linux/bio.h>
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
|
||||
int flags;
|
||||
flags = BIO_RW_SYNC;
|
||||
|
||||
;
|
||||
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: yes" >&5
|
||||
$as_echo "yes" >&6; }
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_BIO_RW_SYNC 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 BIO_RW_SYNCIO is defined" >&5
|
||||
$as_echo_n "checking whether BIO_RW_SYNCIO is defined... " >&6; }
|
||||
|
||||
@ -16153,6 +16351,72 @@ fi
|
||||
|
||||
|
||||
|
||||
{ $as_echo "$as_me:$LINENO: checking whether REQ_SYNC is defined" >&5
|
||||
$as_echo_n "checking whether REQ_SYNC is defined... " >&6; }
|
||||
|
||||
|
||||
cat confdefs.h - <<_ACEOF >conftest.c
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
|
||||
|
||||
#include <linux/bio.h>
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
|
||||
int flags;
|
||||
flags = REQ_SYNC;
|
||||
|
||||
;
|
||||
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: yes" >&5
|
||||
$as_echo "yes" >&6; }
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_REQ_SYNC 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_end_request() is available" >&5
|
||||
$as_echo_n "checking whether blk_end_request() is available... " >&6; }
|
||||
|
||||
|
||||
@ -58,13 +58,6 @@ extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
|
||||
# define BIO_END_IO_RETURN(rc) return rc
|
||||
#endif /* HAVE_2ARGS_BIO_END_IO_T */
|
||||
|
||||
/* 2.6.29 API change */
|
||||
#ifdef HAVE_BIO_RW_SYNCIO
|
||||
# define DIO_RW_SYNCIO BIO_RW_SYNCIO
|
||||
#else
|
||||
# define DIO_RW_SYNCIO BIO_RW_SYNC
|
||||
#endif /* HAVE_BIO_RW_SYNCIO */
|
||||
|
||||
/* 2.6.28 API change */
|
||||
#ifdef HAVE_OPEN_BDEV_EXCLUSIVE
|
||||
# define vdev_bdev_open(path, md, hld) open_bdev_exclusive(path, md, hld)
|
||||
|
||||
@ -220,6 +220,27 @@ vdev_disk_dio_free(dio_request_t *dr)
|
||||
sizeof(struct bio *) * dr->dr_bio_count);
|
||||
}
|
||||
|
||||
static int
|
||||
vdev_disk_dio_is_sync(dio_request_t *dr)
|
||||
{
|
||||
#ifdef HAVE_BIO_RW_SYNC
|
||||
/* BIO_RW_SYNC preferred interface from 2.6.12-2.6.29 */
|
||||
return (dr->dr_rw & (1 << BIO_RW_SYNC));
|
||||
#else
|
||||
# ifdef HAVE_BIO_RW_SYNCIO
|
||||
/* BIO_RW_SYNCIO preferred interface from 2.6.30-2.6.35 */
|
||||
return (dr->dr_rw & (1 << BIO_RW_SYNCIO));
|
||||
# else
|
||||
# ifdef HAVE_REQ_SYNC
|
||||
/* REQ_SYNC preferred interface from 2.6.36-2.6.xx */
|
||||
return (dr->dr_rw & REQ_SYNC);
|
||||
# else
|
||||
# error "Unable to determine bio sync flag"
|
||||
# endif /* HAVE_REQ_SYNC */
|
||||
# endif /* HAVE_BIO_RW_SYNC */
|
||||
#endif /* HAVE_BIO_RW_SYNCIO */
|
||||
}
|
||||
|
||||
static void
|
||||
vdev_disk_dio_get(dio_request_t *dr)
|
||||
{
|
||||
@ -284,7 +305,7 @@ BIO_END_IO_PROTO(vdev_disk_physio_completion, bio, size, error)
|
||||
rc = vdev_disk_dio_put(dr);
|
||||
|
||||
/* Wake up synchronous waiter this is the last outstanding bio */
|
||||
if ((rc == 1) && (dr->dr_rw & (1 << DIO_RW_SYNCIO)))
|
||||
if ((rc == 1) && vdev_disk_dio_is_sync(dr))
|
||||
complete(&dr->dr_comp);
|
||||
|
||||
BIO_END_IO_RETURN(0);
|
||||
@ -421,7 +442,7 @@ __vdev_disk_physio(struct block_device *bdev, zio_t *zio, caddr_t kbuf_ptr,
|
||||
* only synchronous consumer is vdev_disk_read_rootlabel() all other
|
||||
* IO originating from vdev_disk_io_start() is asynchronous.
|
||||
*/
|
||||
if (dr->dr_rw & (1 << DIO_RW_SYNCIO)) {
|
||||
if (vdev_disk_dio_is_sync(dr)) {
|
||||
wait_for_completion(&dr->dr_comp);
|
||||
error = dr->dr_error;
|
||||
ASSERT3S(atomic_read(&dr->dr_ref), ==, 1);
|
||||
|
||||
@ -24,6 +24,9 @@
|
||||
/* BIO_RW_FAILFAST_* are defined */
|
||||
#undef HAVE_BIO_RW_FAILFAST_DTD
|
||||
|
||||
/* BIO_RW_SYNC is defined */
|
||||
#undef HAVE_BIO_RW_SYNC
|
||||
|
||||
/* BIO_RW_SYNCIO is defined */
|
||||
#undef HAVE_BIO_RW_SYNCIO
|
||||
|
||||
@ -96,6 +99,9 @@
|
||||
/* open_bdev_exclusive() is available */
|
||||
#undef HAVE_OPEN_BDEV_EXCLUSIVE
|
||||
|
||||
/* REQ_SYNC is defined */
|
||||
#undef HAVE_REQ_SYNC
|
||||
|
||||
/* rq_for_each_segment() is available */
|
||||
#undef HAVE_RQ_FOR_EACH_SEGMENT
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user