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-rw-r--r--drivers/md/dm-table.c41
-rw-r--r--drivers/md/dm-zone.c35
-rw-r--r--drivers/md/dm.c6
-rw-r--r--drivers/md/dm.h5
4 files changed, 73 insertions, 14 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 279f1e024796..69d4a0e0e613 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1491,6 +1491,18 @@ bool dm_table_has_no_data_devices(struct dm_table *t)
return true;
}
+bool dm_table_is_wildcard(struct dm_table *t)
+{
+ for (unsigned int i = 0; i < t->num_targets; i++) {
+ struct dm_target *ti = dm_table_get_target(t, i);
+
+ if (!dm_target_is_wildcard(ti->type))
+ return false;
+ }
+
+ return true;
+}
+
static int device_not_zoned(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
@@ -1831,6 +1843,19 @@ static bool dm_table_supports_atomic_writes(struct dm_table *t)
return true;
}
+bool dm_table_supports_size_change(struct dm_table *t, sector_t old_size,
+ sector_t new_size)
+{
+ if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && dm_has_zone_plugs(t->md) &&
+ old_size != new_size) {
+ DMWARN("%s: device has zone write plug resources. "
+ "Cannot change size",
+ dm_device_name(t->md));
+ return false;
+ }
+ return true;
+}
+
int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *limits)
{
@@ -1868,11 +1893,17 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
limits->features &= ~BLK_FEAT_DAX;
/* For a zoned table, setup the zone related queue attributes. */
- if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
- (limits->features & BLK_FEAT_ZONED)) {
- r = dm_set_zones_restrictions(t, q, limits);
- if (r)
- return r;
+ if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) {
+ if (limits->features & BLK_FEAT_ZONED) {
+ r = dm_set_zones_restrictions(t, q, limits);
+ if (r)
+ return r;
+ } else if (dm_has_zone_plugs(t->md)) {
+ DMWARN("%s: device has zone write plug resources. "
+ "Cannot switch to non-zoned table.",
+ dm_device_name(t->md));
+ return -EINVAL;
+ }
}
if (dm_table_supports_atomic_writes(t))
diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c
index ff9a1a94eea9..4af78111d0b4 100644
--- a/drivers/md/dm-zone.c
+++ b/drivers/md/dm-zone.c
@@ -160,22 +160,22 @@ int dm_revalidate_zones(struct dm_table *t, struct request_queue *q)
{
struct mapped_device *md = t->md;
struct gendisk *disk = md->disk;
+ unsigned int nr_zones = disk->nr_zones;
int ret;
if (!get_capacity(disk))
return 0;
- /* Revalidate only if something changed. */
- if (!disk->nr_zones || disk->nr_zones != md->nr_zones) {
- DMINFO("%s using %s zone append",
- disk->disk_name,
- queue_emulates_zone_append(q) ? "emulated" : "native");
- md->nr_zones = 0;
- }
-
- if (md->nr_zones)
+ /*
+ * Do not revalidate if zone write plug resources have already
+ * been allocated.
+ */
+ if (dm_has_zone_plugs(md))
return 0;
+ DMINFO("%s using %s zone append", disk->disk_name,
+ queue_emulates_zone_append(q) ? "emulated" : "native");
+
/*
* Our table is not live yet. So the call to dm_get_live_table()
* in dm_blk_report_zones() will fail. Set a temporary pointer to
@@ -189,6 +189,7 @@ int dm_revalidate_zones(struct dm_table *t, struct request_queue *q)
if (ret) {
DMERR("Revalidate zones failed %d", ret);
+ disk->nr_zones = nr_zones;
return ret;
}
@@ -385,12 +386,28 @@ int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
lim->max_open_zones = 0;
lim->max_active_zones = 0;
lim->max_hw_zone_append_sectors = 0;
+ lim->max_zone_append_sectors = 0;
lim->zone_write_granularity = 0;
lim->chunk_sectors = 0;
lim->features &= ~BLK_FEAT_ZONED;
return 0;
}
+ if (get_capacity(disk) && dm_has_zone_plugs(t->md)) {
+ if (q->limits.chunk_sectors != lim->chunk_sectors) {
+ DMWARN("%s: device has zone write plug resources. "
+ "Cannot change zone size",
+ disk->disk_name);
+ return -EINVAL;
+ }
+ if (lim->max_hw_zone_append_sectors != 0 &&
+ !dm_table_is_wildcard(t)) {
+ DMWARN("%s: device has zone write plug resources. "
+ "New table must emulate zone append",
+ disk->disk_name);
+ return -EINVAL;
+ }
+ }
/*
* Warn once (when the capacity is not yet set) if the mapped device is
* partially using zone resources of the target devices as that leads to
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 292414da871d..240f6dab8dda 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2429,6 +2429,12 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
size = dm_table_get_size(t);
old_size = dm_get_size(md);
+
+ if (!dm_table_supports_size_change(t, old_size, size)) {
+ old_map = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
set_capacity(md->disk, size);
ret = dm_table_set_restrictions(t, md->queue, limits);
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index e5d3a9f46a91..245f52b59215 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -58,6 +58,7 @@ void dm_table_event_callback(struct dm_table *t,
void (*fn)(void *), void *context);
struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector);
bool dm_table_has_no_data_devices(struct dm_table *table);
+bool dm_table_is_wildcard(struct dm_table *t);
int dm_calculate_queue_limits(struct dm_table *table,
struct queue_limits *limits);
int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
@@ -72,6 +73,8 @@ struct target_type *dm_table_get_immutable_target_type(struct dm_table *t);
struct dm_target *dm_table_get_immutable_target(struct dm_table *t);
struct dm_target *dm_table_get_wildcard_target(struct dm_table *t);
bool dm_table_request_based(struct dm_table *t);
+bool dm_table_supports_size_change(struct dm_table *t, sector_t old_size,
+ sector_t new_size);
void dm_lock_md_type(struct mapped_device *md);
void dm_unlock_md_type(struct mapped_device *md);
@@ -111,12 +114,14 @@ bool dm_is_zone_write(struct mapped_device *md, struct bio *bio);
int dm_zone_get_reset_bitmap(struct mapped_device *md, struct dm_table *t,
sector_t sector, unsigned int nr_zones,
unsigned long *need_reset);
+#define dm_has_zone_plugs(md) ((md)->disk->zone_wplugs_hash != NULL)
#else
#define dm_blk_report_zones NULL
static inline bool dm_is_zone_write(struct mapped_device *md, struct bio *bio)
{
return false;
}
+#define dm_has_zone_plugs(md) false
#endif
/*
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.