diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-01-26 20:37:35 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-04-20 11:57:52 -0700 |
| commit | b0686260fecaa924d8eff2ace94bee70506bc308 (patch) | |
| tree | 36193b32e9f64ee93c4dd02e29da9256e8930fb7 /include | |
| parent | d8f07aee3f2fd959878bf614d4e984900018eb9e (diff) | |
dax: introduce dax_direct_access()
Replace bdev_direct_access() with dax_direct_access() that uses
dax_device and dax_operations instead of a block_device and
block_device_operations for dax. Once all consumers of the old api have
been converted bdev_direct_access() will be deleted.
Given that block device partitioning decisions can cause dax page
alignment constraints to be violated this also introduces the
bdev_dax_pgoff() helper. It handles calculating a logical pgoff relative
to the dax_device and also checks for page alignment.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/blkdev.h | 1 | ||||
| -rw-r--r-- | include/linux/dax.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index f72708399b83..612c497d1461 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1958,6 +1958,7 @@ extern int bdev_write_page(struct block_device *, sector_t, struct page *, struct writeback_control *); extern long bdev_direct_access(struct block_device *, struct blk_dax_ctl *); extern int bdev_dax_supported(struct super_block *, int); +int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff); #else /* CONFIG_BLOCK */ struct block_device; diff --git a/include/linux/dax.h b/include/linux/dax.h index 39a0312c45c3..7e62e280c11f 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -27,6 +27,8 @@ void put_dax(struct dax_device *dax_dev); bool dax_alive(struct dax_device *dax_dev); void kill_dax(struct dax_device *dax_dev); void *dax_get_private(struct dax_device *dax_dev); +long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, + void **kaddr, pfn_t *pfn); /* * We use lowest available bit in exceptional entry for locking, one bit for |