/*----------------------------------------------------------------*/
-static bool passdown_enabled(struct pool_c *pt)
-{
- return pt->adjusted_pf.discard_passdown;
-}
-
static void set_discard_callbacks(struct pool *pool)
{
struct pool_c *pt = pool->ti->private;
- if (passdown_enabled(pt)) {
+ if (pt->adjusted_pf.discard_passdown) {
pool->process_discard_cell = process_discard_cell_passdown;
pool->process_prepared_discard = process_prepared_discard_passdown_pt1;
pool->process_prepared_discard_pt2 = process_prepared_discard_passdown_pt2;
* If discard_passdown was enabled verify that the data device
* supports discards. Disable discard_passdown if not.
*/
-static void disable_passdown_if_not_supported(struct pool_c *pt)
+static void disable_discard_passdown_if_not_supported(struct pool_c *pt)
{
struct pool *pool = pt->pool;
struct block_device *data_bdev = pt->data_dev->bdev;
static int pool_map(struct dm_target *ti, struct bio *bio)
{
- int r;
struct pool_c *pt = ti->private;
struct pool *pool = pt->pool;
*/
spin_lock_irq(&pool->lock);
bio_set_dev(bio, pt->data_dev->bdev);
- r = DM_MAPIO_REMAPPED;
spin_unlock_irq(&pool->lock);
- return r;
+ return DM_MAPIO_REMAPPED;
}
static int maybe_resize_data_dev(struct dm_target *ti, bool *need_commit)
* They get transferred to the live pool in bind_control_target()
* called from pool_preresume().
*/
- if (!pt->adjusted_pf.discard_enabled) {
+
+ if (pt->adjusted_pf.discard_enabled) {
+ disable_discard_passdown_if_not_supported(pt);
+ if (!pt->adjusted_pf.discard_passdown)
+ limits->max_discard_sectors = 0;
+ /*
+ * The pool uses the same discard limits as the underlying data
+ * device. DM core has already set this up.
+ */
+ } else {
/*
* Must explicitly disallow stacking discard limits otherwise the
* block layer will stack them if pool's data device has support.
*/
limits->discard_granularity = 0;
- return;
}
-
- disable_passdown_if_not_supported(pt);
-
- /*
- * The pool uses the same discard limits as the underlying data
- * device. DM core has already set this up.
- */
}
static struct target_type pool_target = {
struct thin_c *tc = ti->private;
struct pool *pool = tc->pool;
- if (!pool->pf.discard_enabled)
- return;
-
- limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT;
- limits->max_discard_sectors = pool->sectors_per_block * BIO_PRISON_MAX_RANGE;
+ if (pool->pf.discard_enabled) {
+ limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT;
+ limits->max_discard_sectors = pool->sectors_per_block * BIO_PRISON_MAX_RANGE;
+ }
}
static struct target_type thin_target = {