block: Expose discard granularity

[mirror_ubuntu-bionic-kernel.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 25119041e034c9f51bdbbbfe4d3ad146ac9ad9c4..1cc02972fbe22cc0fda12e186cf16d6dcbeedc3c 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -312,12 +312,15 @@ struct queue_limits {
        unsigned int            io_min;
        unsigned int            io_opt;
        unsigned int            max_discard_sectors;
+       unsigned int            discard_granularity;
+       unsigned int            discard_alignment;
 
        unsigned short          logical_block_size;
        unsigned short          max_hw_segments;
        unsigned short          max_phys_segments;
 
        unsigned char           misaligned;
+       unsigned char           discard_misaligned;
        unsigned char           no_cluster;
 };
 
@@ -823,19 +826,6 @@ static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
        return bdev->bd_disk->queue;
 }
 
-static inline void blk_run_backing_dev(struct backing_dev_info *bdi,
-                                      struct page *page)
-{
-       if (bdi && bdi->unplug_io_fn)
-               bdi->unplug_io_fn(bdi, page);
-}
-
-static inline void blk_run_address_space(struct address_space *mapping)
-{
-       if (mapping)
-               blk_run_backing_dev(mapping->backing_dev_info, NULL);
-}
-
 /*
  * blk_rq_pos()                        : the current sector
  * blk_rq_bytes()              : bytes left in the entire request
@@ -1134,6 +1124,21 @@ static inline int bdev_alignment_offset(struct block_device *bdev)
        return q->limits.alignment_offset;
 }
 
+static inline int queue_discard_alignment(struct request_queue *q)
+{
+       if (q->limits.discard_misaligned)
+               return -1;
+
+       return q->limits.discard_alignment;
+}
+
+static inline int queue_sector_discard_alignment(struct request_queue *q,
+                                                sector_t sector)
+{
+       return ((sector << 9) - q->limits.discard_alignment)
+               & (q->limits.discard_granularity - 1);
+}
+
 static inline int queue_dma_alignment(struct request_queue *q)
 {
        return q ? q->dma_alignment : 511;
@@ -1172,11 +1177,7 @@ static inline void put_dev_sector(Sector p)
 }
 
 struct work_struct;
-struct delayed_work;
 int kblockd_schedule_work(struct request_queue *q, struct work_struct *work);
-int kblockd_schedule_delayed_work(struct request_queue *q,
-                                       struct delayed_work *work,
-                                       unsigned long delay);
 
 #define MODULE_ALIAS_BLOCKDEV(major,minor) \
        MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))