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path: root/drivers/block/null_blk/zoned.c
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Diffstat (limited to 'drivers/block/null_blk/zoned.c')
-rw-r--r--drivers/block/null_blk/zoned.c95
1 files changed, 92 insertions, 3 deletions
diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c
index 55a69e48ef8b..635ce0648133 100644
--- a/drivers/block/null_blk/zoned.c
+++ b/drivers/block/null_blk/zoned.c
@@ -384,8 +384,10 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
null_lock_zone(dev, zone);
- if (zone->cond == BLK_ZONE_COND_FULL) {
- /* Cannot write to a full zone */
+ if (zone->cond == BLK_ZONE_COND_FULL ||
+ zone->cond == BLK_ZONE_COND_READONLY ||
+ zone->cond == BLK_ZONE_COND_OFFLINE) {
+ /* Cannot write to the zone */
ret = BLK_STS_IOERR;
goto unlock;
}
@@ -613,7 +615,9 @@ static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_op op,
for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
zone = &dev->zones[i];
null_lock_zone(dev, zone);
- if (zone->cond != BLK_ZONE_COND_EMPTY) {
+ if (zone->cond != BLK_ZONE_COND_EMPTY &&
+ zone->cond != BLK_ZONE_COND_READONLY &&
+ zone->cond != BLK_ZONE_COND_OFFLINE) {
null_reset_zone(dev, zone);
trace_nullb_zone_op(cmd, i, zone->cond);
}
@@ -627,6 +631,12 @@ static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_op op,
null_lock_zone(dev, zone);
+ if (zone->cond == BLK_ZONE_COND_READONLY ||
+ zone->cond == BLK_ZONE_COND_OFFLINE) {
+ ret = BLK_STS_IOERR;
+ goto unlock;
+ }
+
switch (op) {
case REQ_OP_ZONE_RESET:
ret = null_reset_zone(dev, zone);
@@ -648,6 +658,7 @@ static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_op op,
if (ret == BLK_STS_OK)
trace_nullb_zone_op(cmd, zone_no, zone->cond);
+unlock:
null_unlock_zone(dev, zone);
return ret;
@@ -674,6 +685,8 @@ blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_op op,
default:
dev = cmd->nq->dev;
zone = &dev->zones[null_zone_no(dev, sector)];
+ if (zone->cond == BLK_ZONE_COND_OFFLINE)
+ return BLK_STS_IOERR;
null_lock_zone(dev, zone);
sts = null_process_cmd(cmd, op, sector, nr_sectors);
@@ -681,3 +694,79 @@ blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_op op,
return sts;
}
}
+
+/*
+ * Set a zone in the read-only or offline condition.
+ */
+static void null_set_zone_cond(struct nullb_device *dev,
+ struct nullb_zone *zone, enum blk_zone_cond cond)
+{
+ if (WARN_ON_ONCE(cond != BLK_ZONE_COND_READONLY &&
+ cond != BLK_ZONE_COND_OFFLINE))
+ return;
+
+ null_lock_zone(dev, zone);
+
+ /*
+ * If the read-only condition is requested again to zones already in
+ * read-only condition, restore back normal empty condition. Do the same
+ * if the offline condition is requested for offline zones. Otherwise,
+ * set the specified zone condition to the zones. Finish the zones
+ * beforehand to free up zone resources.
+ */
+ if (zone->cond == cond) {
+ zone->cond = BLK_ZONE_COND_EMPTY;
+ zone->wp = zone->start;
+ if (dev->memory_backed)
+ null_handle_discard(dev, zone->start, zone->len);
+ } else {
+ if (zone->cond != BLK_ZONE_COND_READONLY &&
+ zone->cond != BLK_ZONE_COND_OFFLINE)
+ null_finish_zone(dev, zone);
+ zone->cond = cond;
+ zone->wp = (sector_t)-1;
+ }
+
+ null_unlock_zone(dev, zone);
+}
+
+/*
+ * Identify a zone from the sector written to configfs file. Then set zone
+ * condition to the zone.
+ */
+ssize_t zone_cond_store(struct nullb_device *dev, const char *page,
+ size_t count, enum blk_zone_cond cond)
+{
+ unsigned long long sector;
+ unsigned int zone_no;
+ int ret;
+
+ if (!dev->zoned) {
+ pr_err("null_blk device is not zoned\n");
+ return -EINVAL;
+ }
+
+ if (!dev->zones) {
+ pr_err("null_blk device is not yet powered\n");
+ return -EINVAL;
+ }
+
+ ret = kstrtoull(page, 0, &sector);
+ if (ret < 0)
+ return ret;
+
+ zone_no = null_zone_no(dev, sector);
+ if (zone_no >= dev->nr_zones) {
+ pr_err("Sector out of range\n");
+ return -EINVAL;
+ }
+
+ if (dev->zones[zone_no].type == BLK_ZONE_TYPE_CONVENTIONAL) {
+ pr_err("Can not change condition of conventional zones\n");
+ return -EINVAL;
+ }
+
+ null_set_zone_cond(dev, &dev->zones[zone_no], cond);
+
+ return count;
+}