Remove the hard-coded limit of two devices and support an unlimited
number of additional zoned devices.
With that we need to increase the device-mapper version number to
3.0.0 as we've modified the interface.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/md/dm-zoned-metadata.c | 68 +++++++++++-----------
drivers/md/dm-zoned-reclaim.c | 28 ++++++---
drivers/md/dm-zoned-target.c | 129 +++++++++++++++++++++++++----------------
drivers/md/dm-zoned.h | 9 +--
4 files changed, 139 insertions(+), 95 deletions(-)
diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
index 5f44970a6187..87784e7785bc 100644
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -260,6 +260,11 @@ unsigned int dmz_zone_nr_sectors_shift(struct dmz_metadata *zmd)
return zmd->zone_nr_sectors_shift;
}
+unsigned int dmz_nr_devs(struct dmz_metadata *zmd)
+{
+ return zmd->nr_devs;
+}
+
unsigned int dmz_nr_zones(struct dmz_metadata *zmd)
{
return zmd->nr_zones;
@@ -270,24 +275,14 @@ unsigned int dmz_nr_chunks(struct dmz_metadata *zmd)
return zmd->nr_chunks;
}
-unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd, int idx)
{
- unsigned int nr_rnd_zones = 0;
- int i;
-
- for (i = 0; i < zmd->nr_devs; i++)
- nr_rnd_zones += zmd->dev[i].nr_rnd;
- return nr_rnd_zones;
+ return zmd->dev[idx].nr_rnd;
}
-unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd, int idx)
{
- unsigned int nr_unmap_rnd_zones = 0;
- int i;
-
- for (i = 0; i < zmd->nr_devs; i++)
- nr_unmap_rnd_zones += atomic_read(&zmd->dev[i].unmap_nr_rnd);
- return nr_unmap_rnd_zones;
+ return atomic_read(&zmd->dev[idx].unmap_nr_rnd);
}
unsigned int dmz_nr_cache_zones(struct dmz_metadata *zmd)
@@ -300,24 +295,14 @@ unsigned int dmz_nr_unmap_cache_zones(struct dmz_metadata *zmd)
return atomic_read(&zmd->unmap_nr_cache);
}
-unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd, int idx)
{
- unsigned int nr_seq_zones = 0;
- int i;
-
- for (i = 0; i < zmd->nr_devs; i++)
- nr_seq_zones += zmd->dev[i].nr_seq;
- return nr_seq_zones;
+ return zmd->dev[idx].nr_seq;
}
-unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd)
+unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd, int idx)
{
- unsigned int nr_unmap_seq_zones = 0;
- int i;
-
- for (i = 0; i < zmd->nr_devs; i++)
- nr_unmap_seq_zones += atomic_read(&zmd->dev[i].unmap_nr_seq);
- return nr_unmap_seq_zones;
+ return atomic_read(&zmd->dev[idx].unmap_nr_seq);
}
static struct dm_zone *dmz_get(struct dmz_metadata *zmd, unsigned int zone_id)
@@ -1530,7 +1515,20 @@ static int dmz_init_zones(struct dmz_metadata *zmd)
*/
zmd->sb[0].zone = dmz_get(zmd, 0);
- zoned_dev = &zmd->dev[1];
+ for (i = 1; i < zmd->nr_devs; i++) {
+ zoned_dev = &zmd->dev[i];
+
+ ret = blkdev_report_zones(zoned_dev->bdev, 0,
+ BLK_ALL_ZONES,
+ dmz_init_zone, zoned_dev);
+ if (ret < 0) {
+ DMDEBUG("(%s): Failed to report zones, error %d",
+ zmd->devname, ret);
+ dmz_drop_zones(zmd);
+ return ret;
+ }
+ }
+ return 0;
}
/*
@@ -2921,10 +2919,14 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev,
zmd->nr_data_zones, zmd->nr_chunks);
dmz_zmd_debug(zmd, " %u cache zones (%u unmapped)",
zmd->nr_cache, atomic_read(&zmd->unmap_nr_cache));
- dmz_zmd_debug(zmd, " %u random zones (%u unmapped)",
- dmz_nr_rnd_zones(zmd), dmz_nr_unmap_rnd_zones(zmd));
- dmz_zmd_debug(zmd, " %u sequential zones (%u unmapped)",
- dmz_nr_seq_zones(zmd), dmz_nr_unmap_seq_zones(zmd));
+ for (i = 0; i < zmd->nr_devs; i++) {
+ dmz_zmd_debug(zmd, " %u random zones (%u unmapped)",
+ dmz_nr_rnd_zones(zmd, i),
+ dmz_nr_unmap_rnd_zones(zmd, i));
+ dmz_zmd_debug(zmd, " %u sequential zones (%u unmapped)",
+ dmz_nr_seq_zones(zmd, i),
+ dmz_nr_unmap_seq_zones(zmd, i));
+ }
dmz_zmd_debug(zmd, " %u reserved sequential data zones",
zmd->nr_reserved_seq);
dmz_zmd_debug(zmd, "Format:");
diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c
index fba0d48e38a7..f2e053b5f2db 100644
--- a/drivers/md/dm-zoned-reclaim.c
+++ b/drivers/md/dm-zoned-reclaim.c
@@ -442,15 +442,18 @@ static unsigned int dmz_reclaim_percentage(struct dmz_reclaim *zrc)
{
struct dmz_metadata *zmd = zrc->metadata;
unsigned int nr_cache = dmz_nr_cache_zones(zmd);
- unsigned int nr_rnd = dmz_nr_rnd_zones(zmd);
- unsigned int nr_unmap, nr_zones;
+ unsigned int nr_unmap = 0, nr_zones = 0;
if (nr_cache) {
nr_zones = nr_cache;
nr_unmap = dmz_nr_unmap_cache_zones(zmd);
} else {
- nr_zones = nr_rnd;
- nr_unmap = dmz_nr_unmap_rnd_zones(zmd);
+ int i;
+
+ for (i = 0; i < dmz_nr_devs(zmd); i++) {
+ nr_zones += dmz_nr_rnd_zones(zmd, i);
+ nr_unmap += dmz_nr_unmap_rnd_zones(zmd, i);
+ }
}
return nr_unmap * 100 / nr_zones;
}
@@ -460,7 +463,11 @@ static unsigned int dmz_reclaim_percentage(struct dmz_reclaim *zrc)
*/
static bool dmz_should_reclaim(struct dmz_reclaim *zrc, unsigned int p_unmap)
{
- unsigned int nr_reclaim = dmz_nr_rnd_zones(zrc->metadata);
+ int i;
+ unsigned int nr_reclaim = 0;
+
+ for (i = 0; i < dmz_nr_devs(zrc->metadata); i++)
+ nr_reclaim += dmz_nr_rnd_zones(zrc->metadata, i);
if (dmz_nr_cache_zones(zrc->metadata))
nr_reclaim += dmz_nr_cache_zones(zrc->metadata);
@@ -487,8 +494,8 @@ static void dmz_reclaim_work(struct work_struct *work)
{
struct dmz_reclaim *zrc = container_of(work, struct dmz_reclaim, work.work);
struct dmz_metadata *zmd = zrc->metadata;
- unsigned int p_unmap;
- int ret;
+ unsigned int p_unmap, nr_unmap_rnd = 0, nr_rnd = 0;
+ int ret, i;
if (dmz_dev_is_dying(zmd))
return;
@@ -513,14 +520,17 @@ static void dmz_reclaim_work(struct work_struct *work)
zrc->kc_throttle.throttle = min(75U, 100U - p_unmap / 2);
}
+ for (i = 0; i < dmz_nr_devs(zmd); i++) {
+ nr_unmap_rnd += dmz_nr_unmap_rnd_zones(zmd, i);
+ nr_rnd += dmz_nr_rnd_zones(zmd, i);
+ }
DMDEBUG("(%s): Reclaim (%u): %s, %u%% free zones (%u/%u cache %u/%u random)",
dmz_metadata_label(zmd),
zrc->kc_throttle.throttle,
(dmz_target_idle(zrc) ? "Idle" : "Busy"),
p_unmap, dmz_nr_unmap_cache_zones(zmd),
dmz_nr_cache_zones(zmd),
- dmz_nr_unmap_rnd_zones(zmd),
- dmz_nr_rnd_zones(zmd));
+ nr_unmap_rnd, nr_rnd);
ret = dmz_do_reclaim(zrc);
if (ret && ret != -EINTR) {
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index bca9a611b8dd..f34fcc3f7cc6 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -13,8 +13,6 @@
#define DMZ_MIN_BIOS 8192
-#define DMZ_MAX_DEVS 2
-
/*
* Zone BIO context.
*/
@@ -40,9 +38,10 @@ struct dm_chunk_work {
* Target descriptor.
*/
struct dmz_target {
- struct dm_dev *ddev[DMZ_MAX_DEVS];
+ struct dm_dev **ddev;
+ unsigned int nr_ddevs;
- unsigned long flags;
+ unsigned int flags;
/* Zoned block device information */
struct dmz_dev *dev;
@@ -764,7 +763,7 @@ static void dmz_put_zoned_device(struct dm_target *ti)
struct dmz_target *dmz = ti->private;
int i;
- for (i = 0; i < DMZ_MAX_DEVS; i++) {
+ for (i = 0; i < dmz->nr_ddevs; i++) {
if (dmz->ddev[i]) {
dm_put_device(ti, dmz->ddev[i]);
dmz->ddev[i] = NULL;
@@ -777,21 +776,35 @@ static int dmz_fixup_devices(struct dm_target *ti)
struct dmz_target *dmz = ti->private;
struct dmz_dev *reg_dev, *zoned_dev;
struct request_queue *q;
+ sector_t zone_nr_sectors = 0;
+ int i;
/*
- * When we have two devices, the first one must be a regular block
- * device and the second a zoned block device.
+ * When we have more than on devices, the first one must be a
+ * regular block device and the others zoned block devices.
*/
- if (dmz->ddev[0] && dmz->ddev[1]) {
+ if (dmz->nr_ddevs > 1) {
reg_dev = &dmz->dev[0];
if (!(reg_dev->flags & DMZ_BDEV_REGULAR)) {
ti->error = "Primary disk is not a regular device";
return -EINVAL;
}
- zoned_dev = &dmz->dev[1];
- if (zoned_dev->flags & DMZ_BDEV_REGULAR) {
- ti->error = "Secondary disk is not a zoned device";
- return -EINVAL;
+ for (i = 1; i < dmz->nr_ddevs; i++) {
+ zoned_dev = &dmz->dev[i];
+ if (zoned_dev->flags & DMZ_BDEV_REGULAR) {
+ ti->error = "Secondary disk is not a zoned device";
+ return -EINVAL;
+ }
+ q = bdev_get_queue(zoned_dev->bdev);
+ if (zone_nr_sectors &&
+ zone_nr_sectors != blk_queue_zone_sectors(q)) {
+ ti->error = "Zone nr sectors mismatch";
+ return -EINVAL;
+ }
+ zone_nr_sectors = blk_queue_zone_sectors(q);
+ zoned_dev->zone_nr_sectors = zone_nr_sectors;
+ zoned_dev->nr_zones =
+ blkdev_nr_zones(zoned_dev->bdev->bd_disk);
}
} else {
reg_dev = NULL;
@@ -800,17 +813,24 @@ static int dmz_fixup_devices(struct dm_target *ti)
ti->error = "Disk is not a zoned device";
return -EINVAL;
}
+ q = bdev_get_queue(zoned_dev->bdev);
+ zoned_dev->zone_nr_sectors = blk_queue_zone_sectors(q);
+ zoned_dev->nr_zones = blkdev_nr_zones(zoned_dev->bdev->bd_disk);
}
- q = bdev_get_queue(zoned_dev->bdev);
- zoned_dev->zone_nr_sectors = blk_queue_zone_sectors(q);
- zoned_dev->nr_zones = blkdev_nr_zones(zoned_dev->bdev->bd_disk);
if (reg_dev) {
- reg_dev->zone_nr_sectors = zoned_dev->zone_nr_sectors;
+ sector_t zone_offset;
+
+ reg_dev->zone_nr_sectors = zone_nr_sectors;
reg_dev->nr_zones =
DIV_ROUND_UP_SECTOR_T(reg_dev->capacity,
reg_dev->zone_nr_sectors);
- zoned_dev->zone_offset = reg_dev->nr_zones;
+ reg_dev->zone_offset = 0;
+ zone_offset = reg_dev->nr_zones;
+ for (i = 1; i < dmz->nr_ddevs; i++) {
+ dmz->dev[i].zone_offset = zone_offset;
+ zone_offset += dmz->dev[i].nr_zones;
+ }
}
return 0;
}
@@ -821,10 +841,10 @@ static int dmz_fixup_devices(struct dm_target *ti)
static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
{
struct dmz_target *dmz;
- int ret;
+ int ret, i;
/* Check arguments */
- if (argc < 1 || argc > 2) {
+ if (argc < 1) {
ti->error = "Invalid argument count";
return -EINVAL;
}
@@ -835,31 +855,31 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->error = "Unable to allocate the zoned target descriptor";
return -ENOMEM;
}
- dmz->dev = kcalloc(2, sizeof(struct dmz_dev), GFP_KERNEL);
+ dmz->dev = kcalloc(argc, sizeof(struct dmz_dev), GFP_KERNEL);
if (!dmz->dev) {
ti->error = "Unable to allocate the zoned device descriptors";
kfree(dmz);
return -ENOMEM;
}
+ dmz->ddev = kcalloc(argc, sizeof(struct dm_dev *), GFP_KERNEL);
+ if (!dmz->ddev) {
+ ti->error = "Unable to allocate the dm device descriptors";
+ ret = -ENOMEM;
+ goto err;
+ }
+ dmz->nr_ddevs = argc;
+
ti->private = dmz;
/* Get the target zoned block device */
- ret = dmz_get_zoned_device(ti, argv[0], 0, argc);
- if (ret)
- goto err;
-
- if (argc == 2) {
- ret = dmz_get_zoned_device(ti, argv[1], 1, argc);
- if (ret) {
- dmz_put_zoned_device(ti);
- goto err;
- }
+ for (i = 0; i < argc; i++) {
+ ret = dmz_get_zoned_device(ti, argv[i], i, argc);
+ if (ret)
+ goto err_dev;
}
ret = dmz_fixup_devices(ti);
- if (ret) {
- dmz_put_zoned_device(ti);
- goto err;
- }
+ if (ret)
+ goto err_dev;
/* Initialize metadata */
ret = dmz_ctr_metadata(dmz->dev, argc, &dmz->metadata,
@@ -1047,13 +1067,13 @@ static int dmz_iterate_devices(struct dm_target *ti,
struct dmz_target *dmz = ti->private;
unsigned int zone_nr_sectors = dmz_zone_nr_sectors(dmz->metadata);
sector_t capacity;
- int r;
+ int i, r;
- capacity = dmz->dev[0].capacity & ~(zone_nr_sectors - 1);
- r = fn(ti, dmz->ddev[0], 0, capacity, data);
- if (!r && dmz->ddev[1]) {
- capacity = dmz->dev[1].capacity & ~(zone_nr_sectors - 1);
- r = fn(ti, dmz->ddev[1], 0, capacity, data);
+ for (i = 0; i < dmz->nr_ddevs; i++) {
+ capacity = dmz->dev[i].capacity & ~(zone_nr_sectors - 1);
+ r = fn(ti, dmz->ddev[i], 0, capacity, data);
+ if (r)
+ break;
}
return r;
}
@@ -1066,24 +1086,35 @@ static void dmz_status(struct dm_target *ti, status_type_t type,
ssize_t sz = 0;
char buf[BDEVNAME_SIZE];
struct dmz_dev *dev;
+ int i;
switch (type) {
case STATUSTYPE_INFO:
- DMEMIT("%u zones %u/%u cache %u/%u random %u/%u sequential",
+ DMEMIT("%u zones %u/%u cache",
dmz_nr_zones(dmz->metadata),
dmz_nr_unmap_cache_zones(dmz->metadata),
- dmz_nr_cache_zones(dmz->metadata),
- dmz_nr_unmap_rnd_zones(dmz->metadata),
- dmz_nr_rnd_zones(dmz->metadata),
- dmz_nr_unmap_seq_zones(dmz->metadata),
- dmz_nr_seq_zones(dmz->metadata));
+ dmz_nr_cache_zones(dmz->metadata));
+ for (i = 0; i < dmz->nr_ddevs; i++) {
+ /*
+ * For a multi-device setup the first device
+ * contains only cache zones.
+ */
+ if ((i == 0) &&
+ (dmz_nr_cache_zones(dmz->metadata) > 0))
+ continue;
+ DMEMIT(" %u/%u random %u/%u sequential",
+ dmz_nr_unmap_rnd_zones(dmz->metadata, i),
+ dmz_nr_rnd_zones(dmz->metadata, i),
+ dmz_nr_unmap_seq_zones(dmz->metadata, i),
+ dmz_nr_seq_zones(dmz->metadata, i));
+ }
break;
case STATUSTYPE_TABLE:
dev = &dmz->dev[0];
format_dev_t(buf, dev->bdev->bd_dev);
DMEMIT("%s", buf);
- if (dmz->dev[1].bdev) {
- dev = &dmz->dev[1];
+ for (i = 1; i < dmz->nr_ddevs; i++) {
+ dev = &dmz->dev[i];
format_dev_t(buf, dev->bdev->bd_dev);
DMEMIT(" %s", buf);
}
@@ -1108,7 +1139,7 @@ static int dmz_message(struct dm_target *ti, unsigned int argc, char **argv,
static struct target_type dmz_type = {
.name = "zoned",
- .version = {2, 0, 0},
+ .version = {3, 0, 0},
.features = DM_TARGET_SINGLETON | DM_TARGET_ZONED_HM,
.module = THIS_MODULE,
.ctr = dmz_ctr,
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h
index 56e138586d9b..0052eee12299 100644
--- a/drivers/md/dm-zoned.h
+++ b/drivers/md/dm-zoned.h
@@ -219,13 +219,14 @@ void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone,
unsigned int chunk);
void dmz_unmap_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
+unsigned int dmz_nr_devs(struct dmz_metadata *zmd);
unsigned int dmz_nr_zones(struct dmz_metadata *zmd);
unsigned int dmz_nr_cache_zones(struct dmz_metadata *zmd);
unsigned int dmz_nr_unmap_cache_zones(struct dmz_metadata *zmd);
-unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd);
-unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd);
-unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd);
-unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd);
+unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd, int idx);
+unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd, int idx);
+unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd, int idx);
+unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd, int idx);
unsigned int dmz_zone_nr_blocks(struct dmz_metadata *zmd);
unsigned int dmz_zone_nr_blocks_shift(struct dmz_metadata *zmd);
unsigned int dmz_zone_nr_sectors(struct dmz_metadata *zmd);
--
2.16.4
--
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