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dm table: fix zoned iterate_devices based device capability checks 

Fix dm_table_supports_zoned_model() and invert logic of both
iterate_devices_callout_fn so that all devices' zoned capabilities are
properly checked.

Add one more parameter to dm_table_any_dev_attr(), which is actually
used as the @data parameter of iterate_devices_callout_fn, so that
dm_table_matches_zone_sectors() can be replaced by
dm_table_any_dev_attr().

Fixes: dd88d313be ("dm table: add zoned block devices validation")
Cc: stable@vger.kernel.org
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Jeffle Xu 2021-02-08 22:46:38 -05:00 committed by Mike Snitzer
parent 5b0fab5089
commit 24f6b6036c
1 changed files with 16 additions and 32 deletions
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48
drivers/md/dm-table.c
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@ -1316,10 +1316,10 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector)
* should use the iteration structure like dm_table_supports_nowait() or
* dm_table_supports_discards(). Or introduce dm_table_all_devs_attr() that
* uses an @anti_func that handle semantics of counter examples, e.g. not
* capable of something. So: return !dm_table_any_dev_attr(t, anti_func);
* capable of something. So: return !dm_table_any_dev_attr(t, anti_func, data);
*/
static bool dm_table_any_dev_attr(struct dm_table *t,
iterate_devices_callout_fn func)
iterate_devices_callout_fn func, void *data)
{
struct dm_target *ti;
unsigned int i;
@ -1328,7 +1328,7 @@ static bool dm_table_any_dev_attr(struct dm_table *t,
ti = dm_table_get_target(t, i);
if (ti->type->iterate_devices &&
ti->type->iterate_devices(ti, func, NULL))
ti->type->iterate_devices(ti, func, data))
return true;
}
@ -1371,13 +1371,13 @@ bool dm_table_has_no_data_devices(struct dm_table *table)
return true;
}
static int device_is_zoned_model(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
static int device_not_zoned_model(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
enum blk_zoned_model *zoned_model = data;
return q && blk_queue_zoned_model(q) == *zoned_model;
return !q || blk_queue_zoned_model(q) != *zoned_model;
}
static bool dm_table_supports_zoned_model(struct dm_table *t,
@ -1394,37 +1394,20 @@ static bool dm_table_supports_zoned_model(struct dm_table *t,
return false;
if (!ti->type->iterate_devices ||
!ti->type->iterate_devices(ti, device_is_zoned_model, &zoned_model))
ti->type->iterate_devices(ti, device_not_zoned_model, &zoned_model))
return false;
}
return true;
}
static int device_matches_zone_sectors(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
static int device_not_matches_zone_sectors(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
unsigned int *zone_sectors = data;
return q && blk_queue_zone_sectors(q) == *zone_sectors;
}
static bool dm_table_matches_zone_sectors(struct dm_table *t,
unsigned int zone_sectors)
{
struct dm_target *ti;
unsigned i;
for (i = 0; i < dm_table_get_num_targets(t); i++) {
ti = dm_table_get_target(t, i);
if (!ti->type->iterate_devices ||
!ti->type->iterate_devices(ti, device_matches_zone_sectors, &zone_sectors))
return false;
}
return true;
return !q || blk_queue_zone_sectors(q) != *zone_sectors;
}
static int validate_hardware_zoned_model(struct dm_table *table,
@ -1444,7 +1427,7 @@ static int validate_hardware_zoned_model(struct dm_table *table,
if (!zone_sectors || !is_power_of_2(zone_sectors))
return -EINVAL;
if (!dm_table_matches_zone_sectors(table, zone_sectors)) {
if (dm_table_any_dev_attr(table, device_not_matches_zone_sectors, &zone_sectors)) {
DMERR("%s: zone sectors is not consistent across all devices",
dm_device_name(table->md));
return -EINVAL;
@ -1830,11 +1813,11 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
else
blk_queue_flag_clear(QUEUE_FLAG_DAX, q);
if (dm_table_any_dev_attr(t, device_dax_write_cache_enabled))
if (dm_table_any_dev_attr(t, device_dax_write_cache_enabled, NULL))
dax_write_cache(t->md->dax_dev, true);
/* Ensure that all underlying devices are non-rotational. */
if (dm_table_any_dev_attr(t, device_is_rotational))
if (dm_table_any_dev_attr(t, device_is_rotational, NULL))
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
else
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
@ -1853,7 +1836,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
* them as well. Only targets that support iterate_devices are considered:
* don't want error, zero, etc to require stable pages.
*/
if (dm_table_any_dev_attr(t, device_requires_stable_pages))
if (dm_table_any_dev_attr(t, device_requires_stable_pages, NULL))
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q);
else
blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, q);
@ -1864,7 +1847,8 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
* Clear QUEUE_FLAG_ADD_RANDOM if any underlying device does not
* have it set.
*/
if (blk_queue_add_random(q) && dm_table_any_dev_attr(t, device_is_not_random))
if (blk_queue_add_random(q) &&
dm_table_any_dev_attr(t, device_is_not_random, NULL))
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
/*