nvdimm.lists.linux.dev archive mirror
 help / color / mirror / Atom feed
From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Matthew Wilcox <willy@infradead.org>,
	Andreas Gruenbacher <agruenba@redhat.com>,
	Shiyang Ruan <ruansy.fnst@fujitsu.com>,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-btrfs@vger.kernel.org, nvdimm@lists.linux.dev,
	cluster-devel@redhat.com
Subject: [PATCH 18/27] iomap: switch iomap_seek_data to use iomap_iter
Date: Mon, 19 Jul 2021 12:35:11 +0200	[thread overview]
Message-ID: <20210719103520.495450-19-hch@lst.de> (raw)
In-Reply-To: <20210719103520.495450-1-hch@lst.de>

Rewrite iomap_seek_data to use iomap_iter.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/iomap/seek.c | 42 +++++++++++++++++++++---------------------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/fs/iomap/seek.c b/fs/iomap/seek.c
index 7d6ed9af925e96..0a758e3851fcb7 100644
--- a/fs/iomap/seek.c
+++ b/fs/iomap/seek.c
@@ -55,23 +55,21 @@ iomap_seek_hole(struct inode *inode, loff_t offset, const struct iomap_ops *ops)
 }
 EXPORT_SYMBOL_GPL(iomap_seek_hole);
 
-static loff_t
-iomap_seek_data_actor(struct inode *inode, loff_t start, loff_t length,
-		      void *data, struct iomap *iomap, struct iomap *srcmap)
+static loff_t iomap_seek_data_iter(const struct iomap_iter *iter, loff_t *pos)
 {
-	loff_t offset = start;
+	loff_t length = iomap_length(iter);
 
-	switch (iomap->type) {
+	switch (iter->iomap.type) {
 	case IOMAP_HOLE:
 		return length;
 	case IOMAP_UNWRITTEN:
-		offset = mapping_seek_hole_data(inode->i_mapping, start,
-				start + length, SEEK_DATA);
-		if (offset < 0)
+		*pos = mapping_seek_hole_data(iter->inode->i_mapping,
+				iter->pos, iter->pos + length, SEEK_DATA);
+		if (*pos < 0)
 			return length;
-		fallthrough;
+		return 0;
 	default:
-		*(loff_t *)data = offset;
+		*pos = iter->pos;
 		return 0;
 	}
 }
@@ -80,22 +78,24 @@ loff_t
 iomap_seek_data(struct inode *inode, loff_t offset, const struct iomap_ops *ops)
 {
 	loff_t size = i_size_read(inode);
-	loff_t ret;
+	struct iomap_iter iter = {
+		.inode	= inode,
+		.pos	= offset,
+		.flags	= IOMAP_REPORT,
+	};
+	int ret;
 
 	/* Nothing to be found before or beyond the end of the file. */
 	if (offset < 0 || offset >= size)
 		return -ENXIO;
 
-	while (offset < size) {
-		ret = iomap_apply(inode, offset, size - offset, IOMAP_REPORT,
-				  ops, &offset, iomap_seek_data_actor);
-		if (ret < 0)
-			return ret;
-		if (ret == 0)
-			return offset;
-		offset += ret;
-	}
-
+	iter.len = size - offset;
+	while ((ret = iomap_iter(&iter, ops)) > 0)
+		iter.processed = iomap_seek_data_iter(&iter, &offset);
+	if (ret < 0)
+		return ret;
+	if (iter.len)
+		return offset;
 	/* We've reached the end of the file without finding data */
 	return -ENXIO;
 }
-- 
2.30.2


  parent reply	other threads:[~2021-07-19 10:58 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19 10:34 RFC: switch iomap to an iterator model Christoph Hellwig
2021-07-19 10:34 ` [PATCH 01/27] iomap: fix a trivial comment typo in trace.h Christoph Hellwig
2021-07-19 16:00   ` Darrick J. Wong
2021-07-19 10:34 ` [PATCH 02/27] iomap: remove the iomap arguments to ->page_{prepare,done} Christoph Hellwig
2021-07-19 16:04   ` Darrick J. Wong
2021-07-19 10:34 ` [PATCH 03/27] iomap: mark the iomap argument to iomap_sector const Christoph Hellwig
2021-07-19 16:08   ` Darrick J. Wong
2021-07-20  9:52     ` Nikolay Borisov
2021-07-26  8:12     ` Christoph Hellwig
2021-07-19 10:34 ` [PATCH 04/27] fs: mark the iomap argument to __block_write_begin_int const Christoph Hellwig
2021-07-19 17:35   ` Darrick J. Wong
2021-07-19 10:34 ` [PATCH 05/27] fsdax: mark the iomap argument to dax_iomap_sector as const Christoph Hellwig
2021-07-19 17:35   ` Darrick J. Wong
2021-07-19 10:34 ` [PATCH 06/27] iomap: mark the iomap argument to iomap_read_inline_data const Christoph Hellwig
2021-07-19 17:35   ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 07/27] iomap: mark the iomap argument to iomap_read_page_sync const Christoph Hellwig
2021-07-19 17:35   ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 08/27] iomap: add the new iomap_iter model Christoph Hellwig
2021-07-19 16:56   ` Darrick J. Wong
2021-07-26  8:15     ` Christoph Hellwig
2021-07-19 21:48   ` Dave Chinner
2021-07-26  8:17     ` Christoph Hellwig
2021-07-19 10:35 ` [PATCH 09/27] iomap: switch readahead and readpage to use iomap_iter Christoph Hellwig
2021-07-19 10:35 ` [PATCH 10/27] iomap: switch iomap_file_buffered_write " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 11/27] iomap: switch iomap_file_unshare " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 12/27] iomap: switch iomap_zero_range " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 13/27] iomap: switch iomap_page_mkwrite " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 14/27] iomap: switch __iomap_dio_rw " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 15/27] iomap: switch iomap_fiemap " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 16/27] iomap: switch iomap_bmap " Christoph Hellwig
2021-07-19 17:05   ` Darrick J. Wong
2021-07-26  8:19     ` Christoph Hellwig
2021-07-26 16:39       ` Darrick J. Wong
2021-07-27  6:31         ` Christoph Hellwig
2021-07-27 14:32           ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 17/27] iomap: switch iomap_seek_hole " Christoph Hellwig
2021-07-19 17:22   ` Darrick J. Wong
2021-07-26  8:22     ` Christoph Hellwig
2021-07-26 16:41       ` Darrick J. Wong
2021-07-19 10:35 ` Christoph Hellwig [this message]
2021-07-19 10:35 ` [PATCH 19/27] iomap: switch iomap_swapfile_activate " Christoph Hellwig
2021-07-19 10:35 ` [PATCH 20/27] fsdax: switch dax_iomap_rw " Christoph Hellwig
2021-07-19 22:10   ` Dave Chinner
2021-07-26  8:25     ` Christoph Hellwig
2021-07-19 10:35 ` [PATCH 21/27] iomap: remove iomap_apply Christoph Hellwig
2021-07-19 17:48   ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 22/27] iomap: pass an iomap_iter to various buffered I/O helpers Christoph Hellwig
2021-07-19 17:48   ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 23/27] iomap: rework unshare flag Christoph Hellwig
2021-07-19 17:44   ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 24/27] fsdax: factor out helpers to simplify the dax fault code Christoph Hellwig
2021-07-19 10:35 ` [PATCH 25/27] fsdax: factor out a dax_fault_actor() helper Christoph Hellwig
2021-07-19 10:35 ` [PATCH 26/27] fsdax: switch the fault handlers to use iomap_iter Christoph Hellwig
2021-07-19 17:35   ` Darrick J. Wong
2021-07-19 10:35 ` [PATCH 27/27] iomap: constify iomap_iter_srcmap Christoph Hellwig
2021-07-19 17:44   ` Darrick J. Wong
2021-07-19 17:57 ` RFC: switch iomap to an iterator model Darrick J. Wong
2021-07-27  8:07   ` DAX setup pains, was " Christoph Hellwig
2021-07-29 20:33 ` Darrick J. Wong

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210719103520.495450-19-hch@lst.de \
    --to=hch@lst.de \
    --cc=agruenba@redhat.com \
    --cc=cluster-devel@redhat.com \
    --cc=dan.j.williams@intel.com \
    --cc=djwong@kernel.org \
    --cc=linux-btrfs@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-xfs@vger.kernel.org \
    --cc=nvdimm@lists.linux.dev \
    --cc=ruansy.fnst@fujitsu.com \
    --cc=willy@infradead.org \
    --subject='Re: [PATCH 18/27] iomap: switch iomap_seek_data to use iomap_iter' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox