From 0be12c1c7fce7e0f464861a7752d489860c376f9 Mon Sep 17 00:00:00 2001
From: Damien Le Moal <damien.lemoal@wdc.com>
Date: Mon, 8 May 2017 16:40:50 -0700
Subject: [PATCH] dm linear: add support for zoned block devices
Git-commit: 0be12c1c7fce7e0f464861a7752d489860c376f9
Patch-mainline: v4.13-rc1
References: fate#322738,fate#322919,fate#322950,fate#323773
Add support for zoned block devices by allowing host-managed zoned block
device mapped targets, the remapping of REQ_OP_ZONE_RESET and the post
processing (reply remapping) of REQ_OP_ZONE_REPORT.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/md/dm-linear.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 7d42a9d9f406..c03c203a90b4 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -89,7 +89,7 @@ static void linear_map_bio(struct dm_target *ti, struct bio *bio)
struct linear_c *lc = ti->private;
bio->bi_bdev = lc->dev->bdev;
- if (bio_sectors(bio))
+ if (bio_sectors(bio) || bio_op(bio) == REQ_OP_ZONE_RESET)
bio->bi_iter.bi_sector =
linear_map_sector(ti, bio->bi_iter.bi_sector);
}
@@ -101,6 +101,17 @@ static int linear_map(struct dm_target *ti, struct bio *bio)
return DM_MAPIO_REMAPPED;
}
+static int linear_end_io(struct dm_target *ti, struct bio *bio,
+ blk_status_t *error)
+{
+ struct linear_c *lc = ti->private;
+
+ if (!*error && bio_op(bio) == REQ_OP_ZONE_REPORT)
+ dm_remap_zone_report(ti, bio, lc->start);
+
+ return DM_ENDIO_DONE;
+}
+
static void linear_status(struct dm_target *ti, status_type_t type,
unsigned status_flags, char *result, unsigned maxlen)
{
@@ -161,12 +172,13 @@ static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff,
static struct target_type linear_target = {
.name = "linear",
- .version = {1, 3, 0},
- .features = DM_TARGET_PASSES_INTEGRITY,
+ .version = {1, 4, 0},
+ .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM,
.module = THIS_MODULE,
.ctr = linear_ctr,
.dtr = linear_dtr,
.map = linear_map,
+ .end_io = linear_end_io,
.status = linear_status,
.prepare_ioctl = linear_prepare_ioctl,
.iterate_devices = linear_iterate_devices,
--
2.13.1