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Linux 3.14 compat: Immutable biovec changes in vdev_disk.c

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bi_sector, bi_size and bi_idx are moved from bio to bio->bi_iter.
This patch creates BIO_BI_*(bio) macros to hide the differences.

Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2124
This commit is contained in:
Chunwei Chen 2014-03-28 15:08:21 +08:00 committed by Brian Behlendorf
parent 408ec0d2e1
commit d4541210f3
4 changed files with 36 additions and 5 deletions
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20
config/kernel-bio-bvec-iter.m4 Normal file
View File

@ -0,0 +1,20 @@
dnl #
dnl # 3.14 API change,
dnl # Immutable biovecs. A number of fields of struct bio are moved to
dnl # struct bvec_iter.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BIO_BVEC_ITER], [
AC_MSG_CHECKING([whether bio has bi_iter])
ZFS_LINUX_TRY_COMPILE([
#include <linux/bio.h>
],[
struct bio bio;
bio.bi_iter.bi_sector = 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_BVEC_ITER, 1, [bio has bi_iter])
],[
AC_MSG_RESULT(no)
])
])

1
config/kernel.m4
View File

@ -17,6 +17,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BIO_BVEC_ITER
ZFS_AC_KERNEL_BIO_FAILFAST
ZFS_AC_KERNEL_BIO_FAILFAST_DTD
ZFS_AC_KERNEL_REQ_FAILFAST_MASK

10
include/linux/blkdev_compat.h
View File

@ -286,6 +286,16 @@ struct req_iterator {
bio_for_each_segment(bvl, _iter.bio, _iter.i)
#endif /* HAVE_RQ_FOR_EACH_SEGMENT */
#ifdef HAVE_BIO_BVEC_ITER
#define BIO_BI_SECTOR(bio) (bio)->bi_iter.bi_sector
#define BIO_BI_SIZE(bio) (bio)->bi_iter.bi_size
#define BIO_BI_IDX(bio) (bio)->bi_iter.bi_idx
#else
#define BIO_BI_SECTOR(bio) (bio)->bi_sector
#define BIO_BI_SIZE(bio) (bio)->bi_size
#define BIO_BI_IDX(bio) (bio)->bi_idx
#endif
/*
* Portable helper for correctly setting the FAILFAST flags. The
* correct usage has changed 3 times from 2.6.12 to 2.6.38.

10
module/zfs/vdev_disk.c
View File

@ -432,11 +432,11 @@ BIO_END_IO_PROTO(vdev_disk_physio_completion, bio, size, error)
"bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d\n"
"bi_idx: %d, bi_size: %d, bi_end_io: %p, bi_cnt: %d\n",
bio->bi_next, bio->bi_flags, bio->bi_rw, bio->bi_vcnt,
bio->bi_idx, bio->bi_size, bio->bi_end_io,
BIO_BI_IDX(bio), BIO_BI_SIZE(bio), bio->bi_end_io,
atomic_read(&bio->bi_cnt));
#ifndef HAVE_2ARGS_BIO_END_IO_T
if (bio->bi_size)
if (BIO_BI_SIZE(bio))
return (1);
#endif /* HAVE_2ARGS_BIO_END_IO_T */
@ -556,7 +556,7 @@ retry:
vdev_disk_dio_get(dr);
dr->dr_bio[i]->bi_bdev = bdev;
dr->dr_bio[i]->bi_sector = bio_offset >> 9;
BIO_BI_SECTOR(dr->dr_bio[i]) = bio_offset >> 9;
dr->dr_bio[i]->bi_rw = dr->dr_rw;
dr->dr_bio[i]->bi_end_io = vdev_disk_physio_completion;
dr->dr_bio[i]->bi_private = dr;
@ -565,8 +565,8 @@ retry:
bio_size = bio_map(dr->dr_bio[i], bio_ptr, bio_size);
/* Advance in buffer and construct another bio if needed */
bio_ptr += dr->dr_bio[i]->bi_size;
bio_offset += dr->dr_bio[i]->bi_size;
bio_ptr += BIO_BI_SIZE(dr->dr_bio[i]);
bio_offset += BIO_BI_SIZE(dr->dr_bio[i]);
}
/* Extra reference to protect dio_request during submit_bio */