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-rw-r--r--block/blk-settings.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index c7ccabc0ec3e..8a2bc124a684 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -96,6 +96,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->max_dev_sectors = 0;
lim->chunk_sectors = 0;
lim->max_write_same_sectors = 0;
+ lim->max_write_zeroes_sectors = 0;
lim->max_discard_sectors = 0;
lim->max_hw_discard_sectors = 0;
lim->discard_granularity = 0;
@@ -132,6 +133,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
lim->max_sectors = UINT_MAX;
lim->max_dev_sectors = UINT_MAX;
lim->max_write_same_sectors = UINT_MAX;
+ lim->max_write_zeroes_sectors = UINT_MAX;
}
EXPORT_SYMBOL(blk_set_stacking_limits);
@@ -300,6 +302,19 @@ void blk_queue_max_write_same_sectors(struct request_queue *q,
EXPORT_SYMBOL(blk_queue_max_write_same_sectors);
/**
+ * blk_queue_max_write_zeroes_sectors - set max sectors for a single
+ * write zeroes
+ * @q: the request queue for the device
+ * @max_write_zeroes_sectors: maximum number of sectors to write per command
+ **/
+void blk_queue_max_write_zeroes_sectors(struct request_queue *q,
+ unsigned int max_write_zeroes_sectors)
+{
+ q->limits.max_write_zeroes_sectors = max_write_zeroes_sectors;
+}
+EXPORT_SYMBOL(blk_queue_max_write_zeroes_sectors);
+
+/**
* blk_queue_max_segments - set max hw segments for a request for this queue
* @q: the request queue for the device
* @max_segments: max number of segments
@@ -527,6 +542,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->max_dev_sectors = min_not_zero(t->max_dev_sectors, b->max_dev_sectors);
t->max_write_same_sectors = min(t->max_write_same_sectors,
b->max_write_same_sectors);
+ t->max_write_zeroes_sectors = min(t->max_write_zeroes_sectors,
+ b->max_write_zeroes_sectors);
t->bounce_pfn = min_not_zero(t->bounce_pfn, b->bounce_pfn);
t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,