[f2fs-dev] [PATCH 2/4] libf2fs_zoned: Introduce f2fs_reset_zone() function

[Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>]

To allow fsck to reset a zone with inconsistent write pointer, introduce
a helper function f2fs_reset_zone().

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
---
 include/f2fs_fs.h   |  1 +
 lib/libf2fs_zoned.c | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index 7d2cdda..ca6e7c2 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -1299,6 +1299,7 @@ extern int f2fs_get_zone_blocks(int);
 typedef int (report_zones_cb_t)(int i, struct blk_zone *blkz, void *opaque);
 extern int f2fs_report_zones(int, report_zones_cb_t *, void *);
 extern int f2fs_check_zones(int);
+int f2fs_reset_zone(struct device_info *dev, struct blk_zone *blkz);
 extern int f2fs_reset_zones(int);
 
 #define SIZE_ALIGN(val, size)	((val) + (size) - 1) / (size)
diff --git a/lib/libf2fs_zoned.c b/lib/libf2fs_zoned.c
index fc4974f..f56fa62 100644
--- a/lib/libf2fs_zoned.c
+++ b/lib/libf2fs_zoned.c
@@ -359,6 +359,24 @@ out:
 	return ret;
 }
 
+int f2fs_reset_zone(struct device_info *dev, struct blk_zone *blkz)
+{
+	struct blk_zone_range range;
+	int ret;
+
+	if (!blk_zone_seq(blkz) || blk_zone_empty(blkz))
+		return 0;
+
+	/* Non empty sequential zone: reset */
+	range.sector = blk_zone_sector(blkz);
+	range.nr_sectors = blk_zone_length(blkz);
+	ret = ioctl(dev->fd, BLKRESETZONE, &range);
+	if (ret != 0)
+		ERR_MSG("ioctl BLKRESETZONE failed\n");
+
+	return ret;
+}
+
 int f2fs_reset_zones(int j)
 {
 	struct device_info *dev = c.devices + j;
@@ -456,6 +474,12 @@ int f2fs_check_zones(int i)
 	return -1;
 }
 
+int f2fs_reset_zone(struct device_info *dev, struct blk_zone *blkz)
+{
+	ERR_MSG("%d: Zoned block devices are not supported\n", i);
+	return -1;
+}
+
 int f2fs_reset_zones(int i)
 {
 	ERR_MSG("%d: Zoned block devices are not supported\n", i);
-- 
2.21.0



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