diff mbox series

[08/10] iomap: pass a flags argument to iomap_dio_rw

Message ID 20210112162616.2003366-9-hch@lst.de (mailing list archive)
State Superseded
Headers show
Series [01/10] xfs: factor out a xfs_ilock_iocb helper | expand

Commit Message

Christoph Hellwig Jan. 12, 2021, 4:26 p.m. UTC
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>
---
 fs/btrfs/file.c       |  7 +++----
 fs/ext4/file.c        |  5 ++---
 fs/gfs2/file.c        |  7 ++-----
 fs/iomap/direct-io.c  | 19 ++++++++++---------
 fs/xfs/xfs_file.c     |  7 +++----
 fs/zonefs/super.c     |  4 ++--
 include/linux/iomap.h |  6 ++++--
 7 files changed, 26 insertions(+), 29 deletions(-)
diff mbox series

Patch

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 0e41459b8de667..ddfd2e2adedf58 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 3ed8c048fb12c5..5d93495bfc6224 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 b39b339feddc93..89609c2997177a 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 933f234d5becd0..96dc72debc4b79 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -420,7 +420,7 @@  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);
@@ -434,8 +434,8 @@  __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);
+	if (is_sync_kiocb(iocb))
+		dio_flags |= IOMAP_DIO_FORCE_WAIT;
 
 	dio = kmalloc(sizeof(*dio), GFP_KERNEL);
 	if (!dio)
@@ -503,7 +503,8 @@  __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
 			goto out_free_dio;
 		}
 
-		if (!wait_for_completion && !inode->i_sb->s_dio_done_wq) {
+		if (!(dio_flags & IOMAP_DIO_FORCE_WAIT) &&
+		    !inode->i_sb->s_dio_done_wq) {
 			ret = sb_init_dio_done_wq(inode->i_sb);
 			if (ret < 0)
 				goto out_free_dio;
@@ -519,7 +520,7 @@  __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
 		if (ret <= 0) {
 			/* magic error code to fall back to buffered I/O */
 			if (ret == -ENOTBLK) {
-				wait_for_completion = true;
+				dio_flags |= IOMAP_DIO_FORCE_WAIT;
 				ret = 0;
 			}
 			break;
@@ -566,9 +567,9 @@  __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
 	 *	of the final reference, and we will complete and free it here
 	 *	after we got woken by the I/O completion handler.
 	 */
-	dio->wait_for_completion = wait_for_completion;
+	dio->wait_for_completion = dio_flags & IOMAP_DIO_FORCE_WAIT;
 	if (!atomic_dec_and_test(&dio->ref)) {
-		if (!wait_for_completion)
+		if (!(dio_flags & IOMAP_DIO_FORCE_WAIT))
 			return ERR_PTR(-EIOCBQUEUED);
 
 		for (;;) {
@@ -598,11 +599,11 @@  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 flags)
 {
 	struct iomap_dio *dio;
 
-	dio = __iomap_dio_rw(iocb, iter, ops, dops, wait_for_completion);
+	dio = __iomap_dio_rw(iocb, iter, ops, dops, 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 bffd7240cefb7f..b181db42f2f32f 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -232,8 +232,7 @@  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,
-			is_sync_kiocb(iocb));
+	ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL, 0);
 	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
 
 	return ret;
@@ -535,7 +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, is_sync_kiocb(iocb));
+			   &xfs_dio_write_ops, 0);
 out_unlock:
 	if (iolock)
 		xfs_iunlock(ip, iolock);
@@ -603,7 +602,7 @@  xfs_file_dio_write_unaligned(
 	 */
 	trace_xfs_file_direct_write(iocb, from);
 	ret = iomap_dio_rw(iocb, from, &xfs_direct_write_iomap_ops,
-			   &xfs_dio_write_ops, true);
+			   &xfs_dio_write_ops, IOMAP_DIO_FORCE_WAIT);
 out_unlock:
 	if (iolock)
 		xfs_iunlock(ip, iolock);
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index bec47f2d074beb..0e7ab0bc00ae8e 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 5bd3cac4df9cb4..e7865654dd0dca 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -256,12 +256,14 @@  struct iomap_dio_ops {
 			struct bio *bio, loff_t file_offset);
 };
 
+#define IOMAP_DIO_FORCE_WAIT	(1 << 0)	/* force waiting for I/O */
+
 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 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 flags);
 ssize_t iomap_dio_complete(struct iomap_dio *dio);
 int iomap_dio_iopoll(struct kiocb *kiocb, bool spin);