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From: Matthew Bobrowski <mbobrowski@mbobrowski.org>
To: tytso@mit.edu, jack@suse.cz, adilger.kernel@dilger.ca
Cc: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	hch@infradead.org, david@fromorbit.com, darrick.wong@oracle.com
Subject: [PATCH v5 01/12] ext4: move set iomap routines into separate helper ext4_set_iomap()
Date: Mon, 21 Oct 2019 20:17:31 +1100	[thread overview]
Message-ID: <7dd1a1a895fd7e55c659b10bba16976faab4cd85.1571647178.git.mbobrowski@mbobrowski.org> (raw)
In-Reply-To: <cover.1571647178.git.mbobrowski@mbobrowski.org>

Separate the iomap field population chunk of code that is currently
within ext4_iomap_begin() into a new helper called
ext4_set_iomap(). The intent of this function is self explanatory,
however the rationale behind doing so is to also reduce the overall
clutter that we currently have within the ext4_iomap_begin() callback.

Signed-off-by: Matthew Bobrowski <mbobrowski@mbobrowski.org>
---
 fs/ext4/inode.c | 59 +++++++++++++++++++++++++++----------------------
 1 file changed, 33 insertions(+), 26 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 516faa280ced..158eea9a1944 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3406,10 +3406,39 @@ static bool ext4_inode_datasync_dirty(struct inode *inode)
 	return inode->i_state & I_DIRTY_DATASYNC;
 }
 
+static void ext4_set_iomap(struct inode *inode, struct iomap *iomap,
+			   struct ext4_map_blocks *map, loff_t offset,
+			   loff_t length)
+{
+	u8 blkbits = inode->i_blkbits;
+
+	iomap->flags = 0;
+	if (ext4_inode_datasync_dirty(inode))
+		iomap->flags |= IOMAP_F_DIRTY;
+
+	if (map->m_flags & EXT4_MAP_NEW)
+		iomap->flags |= IOMAP_F_NEW;
+
+	iomap->bdev = inode->i_sb->s_bdev;
+	iomap->dax_dev = EXT4_SB(inode->i_sb)->s_daxdev;
+	iomap->offset = (u64) map->m_lblk << blkbits;
+	iomap->length = (u64) map->m_len << blkbits;
+
+	if (map->m_flags & (EXT4_MAP_MAPPED | EXT4_MAP_UNWRITTEN)) {
+		if (map->m_flags & EXT4_MAP_MAPPED)
+			iomap->type = IOMAP_MAPPED;
+		else if (map->m_flags & EXT4_MAP_UNWRITTEN)
+			iomap->type = IOMAP_UNWRITTEN;
+		iomap->addr = (u64) map->m_pblk << blkbits;
+	} else {
+		iomap->type = IOMAP_HOLE;
+		iomap->addr = IOMAP_NULL_ADDR;
+	}
+}
+
 static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 			    unsigned flags, struct iomap *iomap)
 {
-	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	unsigned int blkbits = inode->i_blkbits;
 	unsigned long first_block, last_block;
 	struct ext4_map_blocks map;
@@ -3523,31 +3552,9 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 			return ret;
 	}
 
-	iomap->flags = 0;
-	if (ext4_inode_datasync_dirty(inode))
-		iomap->flags |= IOMAP_F_DIRTY;
-	iomap->bdev = inode->i_sb->s_bdev;
-	iomap->dax_dev = sbi->s_daxdev;
-	iomap->offset = (u64)first_block << blkbits;
-	iomap->length = (u64)map.m_len << blkbits;
-
-	if (ret == 0) {
-		iomap->type = delalloc ? IOMAP_DELALLOC : IOMAP_HOLE;
-		iomap->addr = IOMAP_NULL_ADDR;
-	} else {
-		if (map.m_flags & EXT4_MAP_MAPPED) {
-			iomap->type = IOMAP_MAPPED;
-		} else if (map.m_flags & EXT4_MAP_UNWRITTEN) {
-			iomap->type = IOMAP_UNWRITTEN;
-		} else {
-			WARN_ON_ONCE(1);
-			return -EIO;
-		}
-		iomap->addr = (u64)map.m_pblk << blkbits;
-	}
-
-	if (map.m_flags & EXT4_MAP_NEW)
-		iomap->flags |= IOMAP_F_NEW;
+	ext4_set_iomap(inode, iomap, &map, offset, length);
+	if (delalloc && iomap->type == IOMAP_HOLE)
+		iomap->type = IOMAP_DELALLOC;
 
 	return 0;
 }
-- 
2.20.1

--<M>--

  reply	other threads:[~2019-10-21  9:17 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-21  9:17 [PATCH v5 00/12] ext4: port direct I/O to iomap infrastructure Matthew Bobrowski
2019-10-21  9:17 ` Matthew Bobrowski [this message]
2019-10-21 13:23   ` [PATCH v5 01/12] ext4: move set iomap routines into separate helper ext4_set_iomap() Jan Kara
2019-10-23  6:31   ` Ritesh Harjani
2019-10-23 10:14     ` Matthew Bobrowski
2019-10-21  9:17 ` [PATCH v5 02/12] ext4: iomap that extends beyond EOF should be marked dirty Matthew Bobrowski
2019-10-21 13:28   ` Jan Kara
2019-10-22  1:49     ` Matthew Bobrowski
2019-10-23  6:35   ` Ritesh Harjani
2019-10-23 10:20     ` Matthew Bobrowski
2019-10-21  9:18 ` [PATCH v5 03/12] ext4: split IOMAP_WRITE branch in ext4_iomap_begin() into helper Matthew Bobrowski
2019-10-21 13:31   ` Jan Kara
2019-10-23  6:37   ` Ritesh Harjani
2019-10-21  9:18 ` [PATCH v5 04/12] ext4: introduce new callback for IOMAP_REPORT Matthew Bobrowski
2019-10-21 13:37   ` Jan Kara
2019-10-22  1:55     ` Matthew Bobrowski
2019-10-23  6:39       ` Ritesh Harjani
2019-10-23 10:35         ` Matthew Bobrowski
2019-10-21  9:18 ` [PATCH v5 05/12] iomap: Allow forcing of waiting for running DIO in iomap_dio_rw() mbobrowski
2019-10-24  1:41   ` Christoph Hellwig
2019-10-24 11:17     ` Matthew Bobrowski
2019-10-21  9:18 ` [PATCH v5 06/12] xfs: Use iomap_dio_rw_wait() mbobrowski
2019-10-21 13:38   ` Jan Kara
2019-10-21  9:18 ` [PATCH v5 07/12] ext4: introduce direct I/O read using iomap infrastructure Matthew Bobrowski
2019-10-21 13:41   ` Jan Kara
2019-10-22  1:58     ` Matthew Bobrowski
2019-10-23  6:40   ` Ritesh Harjani
2019-10-21  9:18 ` [PATCH v5 08/12] ext4: update direct I/O read to do trylock in IOCB_NOWAIT cases Matthew Bobrowski
2019-10-21 13:48   ` Jan Kara
2019-10-22  2:04     ` Matthew Bobrowski
2019-10-22  7:50       ` Jan Kara
2019-10-23  6:51   ` Ritesh Harjani
2019-10-21  9:18 ` [PATCH v5 09/12] ext4: move inode extension/truncate code out from ->iomap_end() callback Matthew Bobrowski
2019-10-21 13:53   ` Jan Kara
2019-10-22  2:07     ` Matthew Bobrowski
2019-10-21  9:20 ` [PATCH v5 12/12] ext4: introduce direct I/O write using iomap infrastructure Matthew Bobrowski
2019-10-21 16:18   ` Jan Kara
2019-10-22  3:02     ` Matthew Bobrowski
2019-10-22  7:55       ` Jan Kara
2019-10-21  9:20 ` [PATCH v5 11/12] ext4: reorder map->m_flags checks in ext4_set_iomap() Matthew Bobrowski
2019-10-21  9:20 ` [PATCH v5 10/12] ext4: move inode extension check out from ext4_iomap_alloc() Matthew Bobrowski
2019-10-21 13:31 ` [PATCH v5 00/12] ext4: port direct I/O to iomap infrastructure Theodore Y. Ts'o
2019-10-21 19:43   ` Jan Kara
2019-10-21 22:38     ` Dave Chinner
2019-10-22  8:01       ` Jan Kara
2019-10-23  2:35     ` Matthew Bobrowski
2019-10-23 10:01       ` Jan Kara
2019-10-23 10:11         ` Matthew Bobrowski
2019-10-24  1:58           ` Christoph Hellwig
2019-10-24 11:09             ` Matthew Bobrowski

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