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dm zoned: support arbitrary number of devices
Remove the hard-coded limit of two devices and support an unlimited number of additional zoned devices. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Hannes Reinecke
Mike Snitzer
parent
bd82fdabf1
commit
4dba12881f
@ -1525,7 +1525,20 @@ static int dmz_init_zones(struct dmz_metadata *zmd)
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*/
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zmd->sb[0].zone = dmz_get(zmd, 0);
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zoned_dev = &zmd->dev[1];
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for (i = 1; i < zmd->nr_devs; i++) {
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zoned_dev = &zmd->dev[i];
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ret = blkdev_report_zones(zoned_dev->bdev, 0,
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BLK_ALL_ZONES,
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dmz_init_zone, zoned_dev);
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if (ret < 0) {
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DMDEBUG("(%s): Failed to report zones, error %d",
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zmd->devname, ret);
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dmz_drop_zones(zmd);
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return ret;
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}
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}
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return 0;
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}
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/*
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@ -13,8 +13,6 @@
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#define DMZ_MIN_BIOS 8192
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#define DMZ_MAX_DEVS 2
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/*
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* Zone BIO context.
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*/
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@ -40,10 +38,10 @@ struct dm_chunk_work {
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* Target descriptor.
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*/
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struct dmz_target {
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struct dm_dev *ddev[DMZ_MAX_DEVS];
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struct dm_dev **ddev;
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unsigned int nr_ddevs;
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unsigned long flags;
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unsigned int flags;
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/* Zoned block device information */
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struct dmz_dev *dev;
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@ -764,7 +762,7 @@ static void dmz_put_zoned_device(struct dm_target *ti)
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struct dmz_target *dmz = ti->private;
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int i;
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for (i = 0; i < DMZ_MAX_DEVS; i++) {
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for (i = 0; i < dmz->nr_ddevs; i++) {
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if (dmz->ddev[i]) {
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dm_put_device(ti, dmz->ddev[i]);
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dmz->ddev[i] = NULL;
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@ -777,21 +775,35 @@ static int dmz_fixup_devices(struct dm_target *ti)
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struct dmz_target *dmz = ti->private;
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struct dmz_dev *reg_dev, *zoned_dev;
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struct request_queue *q;
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sector_t zone_nr_sectors = 0;
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int i;
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/*
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* When we have two devices, the first one must be a regular block
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* device and the second a zoned block device.
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* When we have more than on devices, the first one must be a
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* regular block device and the others zoned block devices.
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*/
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if (dmz->ddev[0] && dmz->ddev[1]) {
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if (dmz->nr_ddevs > 1) {
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reg_dev = &dmz->dev[0];
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if (!(reg_dev->flags & DMZ_BDEV_REGULAR)) {
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ti->error = "Primary disk is not a regular device";
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return -EINVAL;
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}
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zoned_dev = &dmz->dev[1];
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if (zoned_dev->flags & DMZ_BDEV_REGULAR) {
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ti->error = "Secondary disk is not a zoned device";
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return -EINVAL;
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for (i = 1; i < dmz->nr_ddevs; i++) {
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zoned_dev = &dmz->dev[i];
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if (zoned_dev->flags & DMZ_BDEV_REGULAR) {
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ti->error = "Secondary disk is not a zoned device";
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return -EINVAL;
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}
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q = bdev_get_queue(zoned_dev->bdev);
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if (zone_nr_sectors &&
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zone_nr_sectors != blk_queue_zone_sectors(q)) {
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ti->error = "Zone nr sectors mismatch";
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return -EINVAL;
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}
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zone_nr_sectors = blk_queue_zone_sectors(q);
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zoned_dev->zone_nr_sectors = zone_nr_sectors;
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zoned_dev->nr_zones =
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blkdev_nr_zones(zoned_dev->bdev->bd_disk);
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}
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} else {
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reg_dev = NULL;
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@ -800,17 +812,24 @@ static int dmz_fixup_devices(struct dm_target *ti)
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ti->error = "Disk is not a zoned device";
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return -EINVAL;
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}
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q = bdev_get_queue(zoned_dev->bdev);
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zoned_dev->zone_nr_sectors = blk_queue_zone_sectors(q);
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zoned_dev->nr_zones = blkdev_nr_zones(zoned_dev->bdev->bd_disk);
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}
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q = bdev_get_queue(zoned_dev->bdev);
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zoned_dev->zone_nr_sectors = blk_queue_zone_sectors(q);
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zoned_dev->nr_zones = blkdev_nr_zones(zoned_dev->bdev->bd_disk);
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if (reg_dev) {
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reg_dev->zone_nr_sectors = zoned_dev->zone_nr_sectors;
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sector_t zone_offset;
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reg_dev->zone_nr_sectors = zone_nr_sectors;
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reg_dev->nr_zones =
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DIV_ROUND_UP_SECTOR_T(reg_dev->capacity,
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reg_dev->zone_nr_sectors);
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zoned_dev->zone_offset = reg_dev->nr_zones;
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reg_dev->zone_offset = 0;
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zone_offset = reg_dev->nr_zones;
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for (i = 1; i < dmz->nr_ddevs; i++) {
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dmz->dev[i].zone_offset = zone_offset;
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zone_offset += dmz->dev[i].nr_zones;
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}
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}
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return 0;
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}
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@ -824,7 +843,7 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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int ret, i;
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/* Check arguments */
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if (argc < 1 || argc > 2) {
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if (argc < 1) {
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ti->error = "Invalid argument count";
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return -EINVAL;
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}
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@ -835,32 +854,31 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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ti->error = "Unable to allocate the zoned target descriptor";
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return -ENOMEM;
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}
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dmz->dev = kcalloc(2, sizeof(struct dmz_dev), GFP_KERNEL);
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dmz->dev = kcalloc(argc, sizeof(struct dmz_dev), GFP_KERNEL);
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if (!dmz->dev) {
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ti->error = "Unable to allocate the zoned device descriptors";
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kfree(dmz);
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return -ENOMEM;
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}
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dmz->ddev = kcalloc(argc, sizeof(struct dm_dev *), GFP_KERNEL);
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if (!dmz->ddev) {
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ti->error = "Unable to allocate the dm device descriptors";
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ret = -ENOMEM;
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goto err;
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}
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dmz->nr_ddevs = argc;
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ti->private = dmz;
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/* Get the target zoned block device */
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ret = dmz_get_zoned_device(ti, argv[0], 0, argc);
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if (ret)
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goto err;
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if (argc == 2) {
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ret = dmz_get_zoned_device(ti, argv[1], 1, argc);
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if (ret) {
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dmz_put_zoned_device(ti);
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goto err;
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}
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for (i = 0; i < argc; i++) {
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ret = dmz_get_zoned_device(ti, argv[i], i, argc);
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if (ret)
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goto err_dev;
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}
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ret = dmz_fixup_devices(ti);
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if (ret) {
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dmz_put_zoned_device(ti);
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goto err;
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}
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if (ret)
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goto err_dev;
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/* Initialize metadata */
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ret = dmz_ctr_metadata(dmz->dev, argc, &dmz->metadata,
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@ -1056,13 +1074,13 @@ static int dmz_iterate_devices(struct dm_target *ti,
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struct dmz_target *dmz = ti->private;
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unsigned int zone_nr_sectors = dmz_zone_nr_sectors(dmz->metadata);
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sector_t capacity;
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int r;
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int i, r;
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capacity = dmz->dev[0].capacity & ~(zone_nr_sectors - 1);
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r = fn(ti, dmz->ddev[0], 0, capacity, data);
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if (!r && dmz->ddev[1]) {
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capacity = dmz->dev[1].capacity & ~(zone_nr_sectors - 1);
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r = fn(ti, dmz->ddev[1], 0, capacity, data);
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for (i = 0; i < dmz->nr_ddevs; i++) {
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capacity = dmz->dev[i].capacity & ~(zone_nr_sectors - 1);
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r = fn(ti, dmz->ddev[i], 0, capacity, data);
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if (r)
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break;
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}
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return r;
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}
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@ -1083,9 +1101,7 @@ static void dmz_status(struct dm_target *ti, status_type_t type,
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dmz_nr_zones(dmz->metadata),
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dmz_nr_unmap_cache_zones(dmz->metadata),
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dmz_nr_cache_zones(dmz->metadata));
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for (i = 0; i < DMZ_MAX_DEVS; i++) {
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if (!dmz->ddev[i])
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continue;
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for (i = 0; i < dmz->nr_ddevs; i++) {
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/*
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* For a multi-device setup the first device
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* contains only cache zones.
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@ -1104,8 +1120,8 @@ static void dmz_status(struct dm_target *ti, status_type_t type,
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dev = &dmz->dev[0];
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format_dev_t(buf, dev->bdev->bd_dev);
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DMEMIT("%s", buf);
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if (dmz->dev[1].bdev) {
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dev = &dmz->dev[1];
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for (i = 1; i < dmz->nr_ddevs; i++) {
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dev = &dmz->dev[i];
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format_dev_t(buf, dev->bdev->bd_dev);
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DMEMIT(" %s", buf);
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}
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