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iomap: add per-iomap_iter private data

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Allow the file system to keep state for all iterations.  For now only
wire it up for direct I/O as there is an immediate need for it there.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2022-05-05 15:11:11 -05:00 committed by David Sterba
parent 908c54909a
commit 786f847f43
9 changed files with 21 additions and 18 deletions
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2
fs/btrfs/inode.c
View File

@ -8167,7 +8167,7 @@ static const struct iomap_dio_ops btrfs_dio_ops = {
ssize_t btrfs_dio_rw(struct kiocb *iocb, struct iov_iter *iter, size_t done_before)
{
return iomap_dio_rw(iocb, iter, &btrfs_dio_iomap_ops, &btrfs_dio_ops,
IOMAP_DIO_PARTIAL, done_before);
IOMAP_DIO_PARTIAL, NULL, done_before);
}
static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,

2
fs/erofs/data.c
View File

@ -385,7 +385,7 @@ static ssize_t erofs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
if (!err)
return iomap_dio_rw(iocb, to, &erofs_iomap_ops,
NULL, 0, 0);
NULL, 0, NULL, 0);
if (err < 0)
return err;
}

4
fs/ext4/file.c
View File

@ -76,7 +76,7 @@ static ssize_t ext4_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
return generic_file_read_iter(iocb, to);
}
ret = iomap_dio_rw(iocb, to, &ext4_iomap_ops, NULL, 0, 0);
ret = iomap_dio_rw(iocb, to, &ext4_iomap_ops, NULL, 0, NULL, 0);
inode_unlock_shared(inode);
file_accessed(iocb->ki_filp);
@ -565,7 +565,7 @@ static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
iomap_ops = &ext4_iomap_overwrite_ops;
ret = iomap_dio_rw(iocb, from, iomap_ops, &ext4_dio_write_ops,
(unaligned_io || extend) ? IOMAP_DIO_FORCE_WAIT : 0,
0);
NULL, 0);
if (ret == -ENOTBLK)
ret = 0;

4
fs/f2fs/file.c
View File

@ -4309,7 +4309,7 @@ static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
*/
inc_page_count(sbi, F2FS_DIO_READ);
dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops,
&f2fs_iomap_dio_read_ops, 0, 0);
&f2fs_iomap_dio_read_ops, 0, NULL, 0);
if (IS_ERR_OR_NULL(dio)) {
ret = PTR_ERR_OR_ZERO(dio);
if (ret != -EIOCBQUEUED)
@ -4527,7 +4527,7 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
if (pos + count > inode->i_size)
dio_flags |= IOMAP_DIO_FORCE_WAIT;
dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops,
&f2fs_iomap_dio_write_ops, dio_flags, 0);
&f2fs_iomap_dio_write_ops, dio_flags, NULL, 0);
if (IS_ERR_OR_NULL(dio)) {
ret = PTR_ERR_OR_ZERO(dio);
if (ret == -ENOTBLK)

4
fs/gfs2/file.c
View File

@ -835,7 +835,7 @@ retry:
pagefault_disable();
to->nofault = true;
ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL,
IOMAP_DIO_PARTIAL, read);
IOMAP_DIO_PARTIAL, NULL, read);
to->nofault = false;
pagefault_enable();
if (ret <= 0 && ret != -EFAULT)
@ -898,7 +898,7 @@ retry:
from->nofault = true;
ret = iomap_dio_rw(iocb, from, &gfs2_iomap_ops, NULL,
IOMAP_DIO_PARTIAL, written);
IOMAP_DIO_PARTIAL, NULL, written);
from->nofault = false;
if (ret <= 0) {
if (ret == -ENOTBLK)

8
fs/iomap/direct-io.c
View File

@ -483,7 +483,7 @@ static loff_t iomap_dio_iter(const struct iomap_iter *iter,
struct iomap_dio *
__iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
unsigned int dio_flags, size_t done_before)
unsigned int dio_flags, void *private, size_t done_before)
{
struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = file_inode(iocb->ki_filp);
@ -492,6 +492,7 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
.pos = iocb->ki_pos,
.len = iov_iter_count(iter),
.flags = IOMAP_DIRECT,
.private = private,
};
loff_t end = iomi.pos + iomi.len - 1, ret = 0;
bool wait_for_completion =
@ -683,11 +684,12 @@ EXPORT_SYMBOL_GPL(__iomap_dio_rw);
ssize_t
iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
unsigned int dio_flags, size_t done_before)
unsigned int dio_flags, void *private, size_t done_before)
{
struct iomap_dio *dio;
dio = __iomap_dio_rw(iocb, iter, ops, dops, dio_flags, done_before);
dio = __iomap_dio_rw(iocb, iter, ops, dops, dio_flags, private,
done_before);
if (IS_ERR_OR_NULL(dio))
return PTR_ERR_OR_ZERO(dio);
return iomap_dio_complete(dio);

6
fs/xfs/xfs_file.c
View File

@ -225,7 +225,7 @@ xfs_file_dio_read(
ret = xfs_ilock_iocb(iocb, XFS_IOLOCK_SHARED);
if (ret)
return ret;
ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL, 0, 0);
ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL, 0, NULL, 0);
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
return ret;
@ -534,7 +534,7 @@ xfs_file_dio_write_aligned(
}
trace_xfs_file_direct_write(iocb, from);
ret = iomap_dio_rw(iocb, from, &xfs_direct_write_iomap_ops,
&xfs_dio_write_ops, 0, 0);
&xfs_dio_write_ops, 0, NULL, 0);
out_unlock:
if (iolock)
xfs_iunlock(ip, iolock);
@ -612,7 +612,7 @@ retry_exclusive:
trace_xfs_file_direct_write(iocb, from);
ret = iomap_dio_rw(iocb, from, &xfs_direct_write_iomap_ops,
&xfs_dio_write_ops, flags, 0);
&xfs_dio_write_ops, flags, NULL, 0);
/*
* Retry unaligned I/O with exclusive blocking semantics if the DIO

4
fs/zonefs/super.c
View File

@ -861,7 +861,7 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from)
ret = zonefs_file_dio_append(iocb, from);
else
ret = iomap_dio_rw(iocb, from, &zonefs_iomap_ops,
&zonefs_write_dio_ops, 0, 0);
&zonefs_write_dio_ops, 0, NULL, 0);
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ &&
(ret > 0 || ret == -EIOCBQUEUED)) {
if (ret > 0)
@ -996,7 +996,7 @@ static ssize_t zonefs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
}
file_accessed(iocb->ki_filp);
ret = iomap_dio_rw(iocb, to, &zonefs_iomap_ops,
&zonefs_read_dio_ops, 0, 0);
&zonefs_read_dio_ops, 0, NULL, 0);
} else {
ret = generic_file_read_iter(iocb, to);
if (ret == -EIO)

5
include/linux/iomap.h
View File

@ -188,6 +188,7 @@ struct iomap_iter {
unsigned flags;
struct iomap iomap;
struct iomap srcmap;
void *private;
};
int iomap_iter(struct iomap_iter *iter, const struct iomap_ops *ops);
@ -354,10 +355,10 @@ struct iomap_dio_ops {
ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
unsigned int dio_flags, size_t done_before);
unsigned int dio_flags, void *private, size_t done_before);
struct iomap_dio *__iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
unsigned int dio_flags, size_t done_before);
unsigned int dio_flags, void *private, size_t done_before);
ssize_t iomap_dio_complete(struct iomap_dio *dio);
void iomap_dio_bio_end_io(struct bio *bio);