From 95099d4622f8cb224d94e314c7a8e0df60b13f87 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 08:38:01 +0000
Subject: [PATCH] enable docker ppp
---
kernel/drivers/block/null_blk_zoned.c | 599 +++++++++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 531 insertions(+), 68 deletions(-)
diff --git a/kernel/drivers/block/null_blk_zoned.c b/kernel/drivers/block/null_blk_zoned.c
index ba018f1..f5df82c 100644
--- a/kernel/drivers/block/null_blk_zoned.c
+++ b/kernel/drivers/block/null_blk_zoned.c
@@ -1,7 +1,10 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/vmalloc.h>
-#include <linux/sizes.h>
+#include <linux/bitmap.h>
#include "null_blk.h"
+
+#define CREATE_TRACE_POINTS
+#include "null_blk_trace.h"
#define MB_TO_SECTS(mb) (((sector_t)mb * SZ_1M) >> SECTOR_SHIFT)
@@ -10,14 +13,14 @@
return sect >> ilog2(dev->zone_size_sects);
}
-int null_zone_init(struct nullb_device *dev)
+int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q)
{
- sector_t dev_capacity_sects;
+ sector_t dev_capacity_sects, zone_capacity_sects;
sector_t sector = 0;
unsigned int i;
if (!is_power_of_2(dev->zone_size)) {
- pr_err("null_blk: zone_size must be power-of-two\n");
+ pr_err("zone_size must be power-of-two\n");
return -EINVAL;
}
if (dev->zone_size > dev->size) {
@@ -25,6 +28,16 @@
return -EINVAL;
}
+ if (!dev->zone_capacity)
+ dev->zone_capacity = dev->zone_size;
+
+ if (dev->zone_capacity > dev->zone_size) {
+ pr_err("null_blk: zone capacity (%lu MB) larger than zone size (%lu MB)\n",
+ dev->zone_capacity, dev->zone_size);
+ return -EINVAL;
+ }
+
+ zone_capacity_sects = MB_TO_SECTS(dev->zone_capacity);
dev_capacity_sects = MB_TO_SECTS(dev->size);
dev->zone_size_sects = MB_TO_SECTS(dev->zone_size);
dev->nr_zones = dev_capacity_sects >> ilog2(dev->zone_size_sects);
@@ -36,7 +49,58 @@
if (!dev->zones)
return -ENOMEM;
- for (i = 0; i < dev->nr_zones; i++) {
+ /*
+ * With memory backing, the zone_lock spinlock needs to be temporarily
+ * released to avoid scheduling in atomic context. To guarantee zone
+ * information protection, use a bitmap to lock zones with
+ * wait_on_bit_lock_io(). Sleeping on the lock is OK as memory backing
+ * implies that the queue is marked with BLK_MQ_F_BLOCKING.
+ */
+ spin_lock_init(&dev->zone_lock);
+ if (dev->memory_backed) {
+ dev->zone_locks = bitmap_zalloc(dev->nr_zones, GFP_KERNEL);
+ if (!dev->zone_locks) {
+ kvfree(dev->zones);
+ return -ENOMEM;
+ }
+ }
+
+ if (dev->zone_nr_conv >= dev->nr_zones) {
+ dev->zone_nr_conv = dev->nr_zones - 1;
+ pr_info("changed the number of conventional zones to %u",
+ dev->zone_nr_conv);
+ }
+
+ /* Max active zones has to be < nbr of seq zones in order to be enforceable */
+ if (dev->zone_max_active >= dev->nr_zones - dev->zone_nr_conv) {
+ dev->zone_max_active = 0;
+ pr_info("zone_max_active limit disabled, limit >= zone count\n");
+ }
+
+ /* Max open zones has to be <= max active zones */
+ if (dev->zone_max_active && dev->zone_max_open > dev->zone_max_active) {
+ dev->zone_max_open = dev->zone_max_active;
+ pr_info("changed the maximum number of open zones to %u\n",
+ dev->nr_zones);
+ } else if (dev->zone_max_open >= dev->nr_zones - dev->zone_nr_conv) {
+ dev->zone_max_open = 0;
+ pr_info("zone_max_open limit disabled, limit >= zone count\n");
+ }
+
+ for (i = 0; i < dev->zone_nr_conv; i++) {
+ struct blk_zone *zone = &dev->zones[i];
+
+ zone->start = sector;
+ zone->len = dev->zone_size_sects;
+ zone->capacity = zone->len;
+ zone->wp = zone->start + zone->len;
+ zone->type = BLK_ZONE_TYPE_CONVENTIONAL;
+ zone->cond = BLK_ZONE_COND_NOT_WP;
+
+ sector += dev->zone_size_sects;
+ }
+
+ for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
struct blk_zone *zone = &dev->zones[i];
zone->start = zone->wp = sector;
@@ -44,111 +108,510 @@
zone->len = dev_capacity_sects - zone->start;
else
zone->len = dev->zone_size_sects;
+ zone->capacity =
+ min_t(sector_t, zone->len, zone_capacity_sects);
zone->type = BLK_ZONE_TYPE_SEQWRITE_REQ;
zone->cond = BLK_ZONE_COND_EMPTY;
sector += dev->zone_size_sects;
}
+ q->limits.zoned = BLK_ZONED_HM;
+ blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
+ blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE);
+
return 0;
}
-void null_zone_exit(struct nullb_device *dev)
+int null_register_zoned_dev(struct nullb *nullb)
{
+ struct nullb_device *dev = nullb->dev;
+ struct request_queue *q = nullb->q;
+
+ if (queue_is_mq(q)) {
+ int ret = blk_revalidate_disk_zones(nullb->disk, NULL);
+
+ if (ret)
+ return ret;
+ } else {
+ blk_queue_chunk_sectors(q, dev->zone_size_sects);
+ q->nr_zones = blkdev_nr_zones(nullb->disk);
+ }
+
+ blk_queue_max_zone_append_sectors(q, dev->zone_size_sects);
+ blk_queue_max_open_zones(q, dev->zone_max_open);
+ blk_queue_max_active_zones(q, dev->zone_max_active);
+
+ return 0;
+}
+
+void null_free_zoned_dev(struct nullb_device *dev)
+{
+ bitmap_free(dev->zone_locks);
kvfree(dev->zones);
dev->zones = NULL;
}
-static void null_zone_fill_bio(struct nullb_device *dev, struct bio *bio,
- unsigned int zno, unsigned int nr_zones)
+static inline void null_lock_zone(struct nullb_device *dev, unsigned int zno)
{
- struct blk_zone_report_hdr *hdr = NULL;
- struct bio_vec bvec;
- struct bvec_iter iter;
- void *addr;
- unsigned int zones_to_cpy;
-
- bio_for_each_segment(bvec, bio, iter) {
- addr = kmap_atomic(bvec.bv_page);
-
- zones_to_cpy = bvec.bv_len / sizeof(struct blk_zone);
-
- if (!hdr) {
- hdr = (struct blk_zone_report_hdr *)addr;
- hdr->nr_zones = nr_zones;
- zones_to_cpy--;
- addr += sizeof(struct blk_zone_report_hdr);
- }
-
- zones_to_cpy = min_t(unsigned int, zones_to_cpy, nr_zones);
-
- memcpy(addr, &dev->zones[zno],
- zones_to_cpy * sizeof(struct blk_zone));
-
- kunmap_atomic(addr);
-
- nr_zones -= zones_to_cpy;
- zno += zones_to_cpy;
-
- if (!nr_zones)
- break;
- }
+ if (dev->memory_backed)
+ wait_on_bit_lock_io(dev->zone_locks, zno, TASK_UNINTERRUPTIBLE);
+ spin_lock_irq(&dev->zone_lock);
}
-blk_status_t null_zone_report(struct nullb *nullb, struct bio *bio)
+static inline void null_unlock_zone(struct nullb_device *dev, unsigned int zno)
+{
+ spin_unlock_irq(&dev->zone_lock);
+
+ if (dev->memory_backed)
+ clear_and_wake_up_bit(zno, dev->zone_locks);
+}
+
+int null_report_zones(struct gendisk *disk, sector_t sector,
+ unsigned int nr_zones, report_zones_cb cb, void *data)
+{
+ struct nullb *nullb = disk->private_data;
+ struct nullb_device *dev = nullb->dev;
+ unsigned int first_zone, i, zno;
+ struct blk_zone zone;
+ int error;
+
+ first_zone = null_zone_no(dev, sector);
+ if (first_zone >= dev->nr_zones)
+ return 0;
+
+ nr_zones = min(nr_zones, dev->nr_zones - first_zone);
+ trace_nullb_report_zones(nullb, nr_zones);
+
+ zno = first_zone;
+ for (i = 0; i < nr_zones; i++, zno++) {
+ /*
+ * Stacked DM target drivers will remap the zone information by
+ * modifying the zone information passed to the report callback.
+ * So use a local copy to avoid corruption of the device zone
+ * array.
+ */
+ null_lock_zone(dev, zno);
+ memcpy(&zone, &dev->zones[zno], sizeof(struct blk_zone));
+ null_unlock_zone(dev, zno);
+
+ error = cb(&zone, i, data);
+ if (error)
+ return error;
+ }
+
+ return nr_zones;
+}
+
+/*
+ * This is called in the case of memory backing from null_process_cmd()
+ * with the target zone already locked.
+ */
+size_t null_zone_valid_read_len(struct nullb *nullb,
+ sector_t sector, unsigned int len)
{
struct nullb_device *dev = nullb->dev;
- unsigned int zno = null_zone_no(dev, bio->bi_iter.bi_sector);
- unsigned int nr_zones = dev->nr_zones - zno;
- unsigned int max_zones;
+ struct blk_zone *zone = &dev->zones[null_zone_no(dev, sector)];
+ unsigned int nr_sectors = len >> SECTOR_SHIFT;
- max_zones = (bio->bi_iter.bi_size / sizeof(struct blk_zone)) - 1;
- nr_zones = min_t(unsigned int, nr_zones, max_zones);
- null_zone_fill_bio(nullb->dev, bio, zno, nr_zones);
+ /* Read must be below the write pointer position */
+ if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL ||
+ sector + nr_sectors <= zone->wp)
+ return len;
+
+ if (sector > zone->wp)
+ return 0;
+
+ return (zone->wp - sector) << SECTOR_SHIFT;
+}
+
+static blk_status_t null_close_zone(struct nullb_device *dev, struct blk_zone *zone)
+{
+ if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
+ return BLK_STS_IOERR;
+
+ switch (zone->cond) {
+ case BLK_ZONE_COND_CLOSED:
+ /* close operation on closed is not an error */
+ return BLK_STS_OK;
+ case BLK_ZONE_COND_IMP_OPEN:
+ dev->nr_zones_imp_open--;
+ break;
+ case BLK_ZONE_COND_EXP_OPEN:
+ dev->nr_zones_exp_open--;
+ break;
+ case BLK_ZONE_COND_EMPTY:
+ case BLK_ZONE_COND_FULL:
+ default:
+ return BLK_STS_IOERR;
+ }
+
+ if (zone->wp == zone->start) {
+ zone->cond = BLK_ZONE_COND_EMPTY;
+ } else {
+ zone->cond = BLK_ZONE_COND_CLOSED;
+ dev->nr_zones_closed++;
+ }
return BLK_STS_OK;
}
-void null_zone_write(struct nullb_cmd *cmd, sector_t sector,
- unsigned int nr_sectors)
+static void null_close_first_imp_zone(struct nullb_device *dev)
+{
+ unsigned int i;
+
+ for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
+ if (dev->zones[i].cond == BLK_ZONE_COND_IMP_OPEN) {
+ null_close_zone(dev, &dev->zones[i]);
+ return;
+ }
+ }
+}
+
+static blk_status_t null_check_active(struct nullb_device *dev)
+{
+ if (!dev->zone_max_active)
+ return BLK_STS_OK;
+
+ if (dev->nr_zones_exp_open + dev->nr_zones_imp_open +
+ dev->nr_zones_closed < dev->zone_max_active)
+ return BLK_STS_OK;
+
+ return BLK_STS_ZONE_ACTIVE_RESOURCE;
+}
+
+static blk_status_t null_check_open(struct nullb_device *dev)
+{
+ if (!dev->zone_max_open)
+ return BLK_STS_OK;
+
+ if (dev->nr_zones_exp_open + dev->nr_zones_imp_open < dev->zone_max_open)
+ return BLK_STS_OK;
+
+ if (dev->nr_zones_imp_open) {
+ if (null_check_active(dev) == BLK_STS_OK) {
+ null_close_first_imp_zone(dev);
+ return BLK_STS_OK;
+ }
+ }
+
+ return BLK_STS_ZONE_OPEN_RESOURCE;
+}
+
+/*
+ * This function matches the manage open zone resources function in the ZBC standard,
+ * with the addition of max active zones support (added in the ZNS standard).
+ *
+ * The function determines if a zone can transition to implicit open or explicit open,
+ * while maintaining the max open zone (and max active zone) limit(s). It may close an
+ * implicit open zone in order to make additional zone resources available.
+ *
+ * ZBC states that an implicit open zone shall be closed only if there is not
+ * room within the open limit. However, with the addition of an active limit,
+ * it is not certain that closing an implicit open zone will allow a new zone
+ * to be opened, since we might already be at the active limit capacity.
+ */
+static blk_status_t null_check_zone_resources(struct nullb_device *dev, struct blk_zone *zone)
+{
+ blk_status_t ret;
+
+ switch (zone->cond) {
+ case BLK_ZONE_COND_EMPTY:
+ ret = null_check_active(dev);
+ if (ret != BLK_STS_OK)
+ return ret;
+ fallthrough;
+ case BLK_ZONE_COND_CLOSED:
+ return null_check_open(dev);
+ default:
+ /* Should never be called for other states */
+ WARN_ON(1);
+ return BLK_STS_IOERR;
+ }
+}
+
+static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
+ unsigned int nr_sectors, bool append)
{
struct nullb_device *dev = cmd->nq->dev;
unsigned int zno = null_zone_no(dev, sector);
struct blk_zone *zone = &dev->zones[zno];
+ blk_status_t ret;
+
+ trace_nullb_zone_op(cmd, zno, zone->cond);
+
+ if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) {
+ if (append)
+ return BLK_STS_IOERR;
+ return null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
+ }
+
+ null_lock_zone(dev, zno);
switch (zone->cond) {
case BLK_ZONE_COND_FULL:
/* Cannot write to a full zone */
- cmd->error = BLK_STS_IOERR;
- break;
+ ret = BLK_STS_IOERR;
+ goto unlock;
case BLK_ZONE_COND_EMPTY:
+ case BLK_ZONE_COND_CLOSED:
+ ret = null_check_zone_resources(dev, zone);
+ if (ret != BLK_STS_OK)
+ goto unlock;
+ break;
case BLK_ZONE_COND_IMP_OPEN:
- /* Writes must be at the write pointer position */
- if (sector != zone->wp) {
- cmd->error = BLK_STS_IOERR;
- break;
- }
-
- if (zone->cond == BLK_ZONE_COND_EMPTY)
- zone->cond = BLK_ZONE_COND_IMP_OPEN;
-
- zone->wp += nr_sectors;
- if (zone->wp == zone->start + zone->len)
- zone->cond = BLK_ZONE_COND_FULL;
+ case BLK_ZONE_COND_EXP_OPEN:
break;
default:
/* Invalid zone condition */
- cmd->error = BLK_STS_IOERR;
- break;
+ ret = BLK_STS_IOERR;
+ goto unlock;
}
+
+ /*
+ * Regular writes must be at the write pointer position.
+ * Zone append writes are automatically issued at the write
+ * pointer and the position returned using the request or BIO
+ * sector.
+ */
+ if (append) {
+ sector = zone->wp;
+ if (cmd->bio)
+ cmd->bio->bi_iter.bi_sector = sector;
+ else
+ cmd->rq->__sector = sector;
+ } else if (sector != zone->wp) {
+ ret = BLK_STS_IOERR;
+ goto unlock;
+ }
+
+ if (zone->wp + nr_sectors > zone->start + zone->capacity) {
+ ret = BLK_STS_IOERR;
+ goto unlock;
+ }
+
+ if (zone->cond == BLK_ZONE_COND_CLOSED) {
+ dev->nr_zones_closed--;
+ dev->nr_zones_imp_open++;
+ } else if (zone->cond == BLK_ZONE_COND_EMPTY) {
+ dev->nr_zones_imp_open++;
+ }
+ if (zone->cond != BLK_ZONE_COND_EXP_OPEN)
+ zone->cond = BLK_ZONE_COND_IMP_OPEN;
+
+ /*
+ * Memory backing allocation may sleep: release the zone_lock spinlock
+ * to avoid scheduling in atomic context. Zone operation atomicity is
+ * still guaranteed through the zone_locks bitmap.
+ */
+ if (dev->memory_backed)
+ spin_unlock_irq(&dev->zone_lock);
+ ret = null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
+ if (dev->memory_backed)
+ spin_lock_irq(&dev->zone_lock);
+
+ if (ret != BLK_STS_OK)
+ goto unlock;
+
+ zone->wp += nr_sectors;
+ if (zone->wp == zone->start + zone->capacity) {
+ if (zone->cond == BLK_ZONE_COND_EXP_OPEN)
+ dev->nr_zones_exp_open--;
+ else if (zone->cond == BLK_ZONE_COND_IMP_OPEN)
+ dev->nr_zones_imp_open--;
+ zone->cond = BLK_ZONE_COND_FULL;
+ }
+ ret = BLK_STS_OK;
+
+unlock:
+ null_unlock_zone(dev, zno);
+
+ return ret;
}
-void null_zone_reset(struct nullb_cmd *cmd, sector_t sector)
+static blk_status_t null_open_zone(struct nullb_device *dev, struct blk_zone *zone)
{
- struct nullb_device *dev = cmd->nq->dev;
- unsigned int zno = null_zone_no(dev, sector);
- struct blk_zone *zone = &dev->zones[zno];
+ blk_status_t ret;
+
+ if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
+ return BLK_STS_IOERR;
+
+ switch (zone->cond) {
+ case BLK_ZONE_COND_EXP_OPEN:
+ /* open operation on exp open is not an error */
+ return BLK_STS_OK;
+ case BLK_ZONE_COND_EMPTY:
+ ret = null_check_zone_resources(dev, zone);
+ if (ret != BLK_STS_OK)
+ return ret;
+ break;
+ case BLK_ZONE_COND_IMP_OPEN:
+ dev->nr_zones_imp_open--;
+ break;
+ case BLK_ZONE_COND_CLOSED:
+ ret = null_check_zone_resources(dev, zone);
+ if (ret != BLK_STS_OK)
+ return ret;
+ dev->nr_zones_closed--;
+ break;
+ case BLK_ZONE_COND_FULL:
+ default:
+ return BLK_STS_IOERR;
+ }
+
+ zone->cond = BLK_ZONE_COND_EXP_OPEN;
+ dev->nr_zones_exp_open++;
+
+ return BLK_STS_OK;
+}
+
+static blk_status_t null_finish_zone(struct nullb_device *dev, struct blk_zone *zone)
+{
+ blk_status_t ret;
+
+ if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
+ return BLK_STS_IOERR;
+
+ switch (zone->cond) {
+ case BLK_ZONE_COND_FULL:
+ /* finish operation on full is not an error */
+ return BLK_STS_OK;
+ case BLK_ZONE_COND_EMPTY:
+ ret = null_check_zone_resources(dev, zone);
+ if (ret != BLK_STS_OK)
+ return ret;
+ break;
+ case BLK_ZONE_COND_IMP_OPEN:
+ dev->nr_zones_imp_open--;
+ break;
+ case BLK_ZONE_COND_EXP_OPEN:
+ dev->nr_zones_exp_open--;
+ break;
+ case BLK_ZONE_COND_CLOSED:
+ ret = null_check_zone_resources(dev, zone);
+ if (ret != BLK_STS_OK)
+ return ret;
+ dev->nr_zones_closed--;
+ break;
+ default:
+ return BLK_STS_IOERR;
+ }
+
+ zone->cond = BLK_ZONE_COND_FULL;
+ zone->wp = zone->start + zone->len;
+
+ return BLK_STS_OK;
+}
+
+static blk_status_t null_reset_zone(struct nullb_device *dev, struct blk_zone *zone)
+{
+ if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
+ return BLK_STS_IOERR;
+
+ switch (zone->cond) {
+ case BLK_ZONE_COND_EMPTY:
+ /* reset operation on empty is not an error */
+ return BLK_STS_OK;
+ case BLK_ZONE_COND_IMP_OPEN:
+ dev->nr_zones_imp_open--;
+ break;
+ case BLK_ZONE_COND_EXP_OPEN:
+ dev->nr_zones_exp_open--;
+ break;
+ case BLK_ZONE_COND_CLOSED:
+ dev->nr_zones_closed--;
+ break;
+ case BLK_ZONE_COND_FULL:
+ break;
+ default:
+ return BLK_STS_IOERR;
+ }
zone->cond = BLK_ZONE_COND_EMPTY;
zone->wp = zone->start;
+
+ return BLK_STS_OK;
+}
+
+static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_opf op,
+ sector_t sector)
+{
+ struct nullb_device *dev = cmd->nq->dev;
+ unsigned int zone_no;
+ struct blk_zone *zone;
+ blk_status_t ret;
+ size_t i;
+
+ if (op == REQ_OP_ZONE_RESET_ALL) {
+ for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
+ null_lock_zone(dev, i);
+ zone = &dev->zones[i];
+ if (zone->cond != BLK_ZONE_COND_EMPTY) {
+ null_reset_zone(dev, zone);
+ trace_nullb_zone_op(cmd, i, zone->cond);
+ }
+ null_unlock_zone(dev, i);
+ }
+ return BLK_STS_OK;
+ }
+
+ zone_no = null_zone_no(dev, sector);
+ zone = &dev->zones[zone_no];
+
+ null_lock_zone(dev, zone_no);
+
+ switch (op) {
+ case REQ_OP_ZONE_RESET:
+ ret = null_reset_zone(dev, zone);
+ break;
+ case REQ_OP_ZONE_OPEN:
+ ret = null_open_zone(dev, zone);
+ break;
+ case REQ_OP_ZONE_CLOSE:
+ ret = null_close_zone(dev, zone);
+ break;
+ case REQ_OP_ZONE_FINISH:
+ ret = null_finish_zone(dev, zone);
+ break;
+ default:
+ ret = BLK_STS_NOTSUPP;
+ break;
+ }
+
+ if (ret == BLK_STS_OK)
+ trace_nullb_zone_op(cmd, zone_no, zone->cond);
+
+ null_unlock_zone(dev, zone_no);
+
+ return ret;
+}
+
+blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_opf op,
+ sector_t sector, sector_t nr_sectors)
+{
+ struct nullb_device *dev = cmd->nq->dev;
+ unsigned int zno = null_zone_no(dev, sector);
+ blk_status_t sts;
+
+ switch (op) {
+ case REQ_OP_WRITE:
+ sts = null_zone_write(cmd, sector, nr_sectors, false);
+ break;
+ case REQ_OP_ZONE_APPEND:
+ sts = null_zone_write(cmd, sector, nr_sectors, true);
+ break;
+ case REQ_OP_ZONE_RESET:
+ case REQ_OP_ZONE_RESET_ALL:
+ case REQ_OP_ZONE_OPEN:
+ case REQ_OP_ZONE_CLOSE:
+ case REQ_OP_ZONE_FINISH:
+ sts = null_zone_mgmt(cmd, op, sector);
+ break;
+ default:
+ null_lock_zone(dev, zno);
+ sts = null_process_cmd(cmd, op, sector, nr_sectors);
+ null_unlock_zone(dev, zno);
+ }
+
+ return sts;
}
--
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