The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 24f6b6036c9eec21191646930ad42808e6180510 Mon Sep 17 00:00:00 2001

From: Jeffle Xu jefflexu@linux.alibaba.com Date: Mon, 8 Feb 2021 22:46:38 -0500 Subject: [PATCH] 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: dd88d313bef02 ("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

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 71f7ec508cf7..77086db8b920 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -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);

/*