iomap: pass a flags argument to iomap_dio_rw
Pass a set of flags to iomap_dio_rw instead of the boolean
wait_for_completion argument. The IOMAP_DIO_FORCE_WAIT flag
replaces the wait_for_completion, but only needs to be passed
when the iocb isn't synchronous to start with to simplify the
callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
[djwong: rework xfs_file.c so that we can push iomap changes separately]
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 0e41459..ddfd2e2 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1949,8 +1949,8 @@ static ssize_t btrfs_direct_write(struct kiocb *iocb, struct iov_iter *from)
goto buffered;
}
- dio = __iomap_dio_rw(iocb, from, &btrfs_dio_iomap_ops,
- &btrfs_dio_ops, is_sync_kiocb(iocb));
+ dio = __iomap_dio_rw(iocb, from, &btrfs_dio_iomap_ops, &btrfs_dio_ops,
+ 0);
btrfs_inode_unlock(inode, ilock_flags);
@@ -3622,8 +3622,7 @@ static ssize_t btrfs_direct_read(struct kiocb *iocb, struct iov_iter *to)
return 0;
btrfs_inode_lock(inode, BTRFS_ILOCK_SHARED);
- ret = iomap_dio_rw(iocb, to, &btrfs_dio_iomap_ops, &btrfs_dio_ops,
- is_sync_kiocb(iocb));
+ ret = iomap_dio_rw(iocb, to, &btrfs_dio_iomap_ops, &btrfs_dio_ops, 0);
btrfs_inode_unlock(inode, BTRFS_ILOCK_SHARED);
return ret;
}
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 349b27f..194f5d0 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -74,8 +74,7 @@ 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,
- is_sync_kiocb(iocb));
+ ret = iomap_dio_rw(iocb, to, &ext4_iomap_ops, NULL, 0);
inode_unlock_shared(inode);
file_accessed(iocb->ki_filp);
@@ -550,7 +549,7 @@ static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (ilock_shared)
iomap_ops = &ext4_iomap_overwrite_ops;
ret = iomap_dio_rw(iocb, from, iomap_ops, &ext4_dio_write_ops,
- is_sync_kiocb(iocb) || unaligned_io || extend);
+ (unaligned_io || extend) ? IOMAP_DIO_FORCE_WAIT : 0);
if (ret == -ENOTBLK)
ret = 0;
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index b39b339..89609c2 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -797,9 +797,7 @@ static ssize_t gfs2_file_direct_read(struct kiocb *iocb, struct iov_iter *to,
if (ret)
goto out_uninit;
- ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL,
- is_sync_kiocb(iocb));
-
+ ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL, 0);
gfs2_glock_dq(gh);
out_uninit:
gfs2_holder_uninit(gh);
@@ -833,8 +831,7 @@ static ssize_t gfs2_file_direct_write(struct kiocb *iocb, struct iov_iter *from,
if (offset + len > i_size_read(&ip->i_inode))
goto out;
- ret = iomap_dio_rw(iocb, from, &gfs2_iomap_ops, NULL,
- is_sync_kiocb(iocb));
+ ret = iomap_dio_rw(iocb, from, &gfs2_iomap_ops, NULL, 0);
if (ret == -ENOTBLK)
ret = 0;
out:
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 604103a..9473437 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -420,13 +420,15 @@ iomap_dio_actor(struct inode *inode, loff_t pos, loff_t length,
struct iomap_dio *
__iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
- bool wait_for_completion)
+ unsigned int dio_flags)
{
struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = file_inode(iocb->ki_filp);
size_t count = iov_iter_count(iter);
loff_t pos = iocb->ki_pos;
loff_t end = iocb->ki_pos + count - 1, ret = 0;
+ bool wait_for_completion =
+ is_sync_kiocb(iocb) || (dio_flags & IOMAP_DIO_FORCE_WAIT);
unsigned int iomap_flags = IOMAP_DIRECT;
struct blk_plug plug;
struct iomap_dio *dio;
@@ -434,9 +436,6 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
if (!count)
return NULL;
- if (WARN_ON(is_sync_kiocb(iocb) && !wait_for_completion))
- return ERR_PTR(-EIO);
-
dio = kmalloc(sizeof(*dio), GFP_KERNEL);
if (!dio)
return ERR_PTR(-ENOMEM);
@@ -598,11 +597,11 @@ 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,
- bool wait_for_completion)
+ unsigned int dio_flags)
{
struct iomap_dio *dio;
- dio = __iomap_dio_rw(iocb, iter, ops, dops, wait_for_completion);
+ dio = __iomap_dio_rw(iocb, iter, ops, dops, dio_flags);
if (IS_ERR_OR_NULL(dio))
return PTR_ERR_OR_ZERO(dio);
return iomap_dio_complete(dio);
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 5b0f93f..7f18dae 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -219,8 +219,7 @@ xfs_file_dio_aio_read(
} else {
xfs_ilock(ip, XFS_IOLOCK_SHARED);
}
- ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL,
- is_sync_kiocb(iocb));
+ ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL, 0);
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
return ret;
@@ -584,7 +583,7 @@ xfs_file_dio_aio_write(
*/
ret = iomap_dio_rw(iocb, from, &xfs_direct_write_iomap_ops,
&xfs_dio_write_ops,
- is_sync_kiocb(iocb) || unaligned_io);
+ unaligned_io ? IOMAP_DIO_FORCE_WAIT : 0);
out:
xfs_iunlock(ip, iolock);
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index bec47f2..0e7ab0b 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -780,7 +780,7 @@ 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, sync);
+ &zonefs_write_dio_ops, 0);
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ &&
(ret > 0 || ret == -EIOCBQUEUED)) {
if (ret > 0)
@@ -917,7 +917,7 @@ 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, is_sync_kiocb(iocb));
+ &zonefs_read_dio_ops, 0);
} else {
ret = generic_file_read_iter(iocb, to);
if (ret == -EIO)
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 5bd3cac..be4e1e1e 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -256,12 +256,18 @@ struct iomap_dio_ops {
struct bio *bio, loff_t file_offset);
};
+/*
+ * Wait for the I/O to complete in iomap_dio_rw even if the kiocb is not
+ * synchronous.
+ */
+#define IOMAP_DIO_FORCE_WAIT (1 << 0)
+
ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
- bool wait_for_completion);
+ unsigned int dio_flags);
struct iomap_dio *__iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
- bool wait_for_completion);
+ unsigned int dio_flags);
ssize_t iomap_dio_complete(struct iomap_dio *dio);
int iomap_dio_iopoll(struct kiocb *kiocb, bool spin);