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authorRoss Zwisler <ross.zwisler@linux.intel.com>2016-02-26 23:19:55 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-27 18:28:52 (GMT)
commit7f6d5b529b7dfe2fca30cbf4bc81e16575090025 (patch)
tree3dce0ed231dadcd470db83c1762a701004c1616b /include
parent20a90f58997245749c2bdfaea9e51f785ec90d0b (diff)
downloadlinux-7f6d5b529b7dfe2fca30cbf4bc81e16575090025.tar.xz
dax: move writeback calls into the filesystems
Previously calls to dax_writeback_mapping_range() for all DAX filesystems (ext2, ext4 & xfs) were centralized in filemap_write_and_wait_range(). dax_writeback_mapping_range() needs a struct block_device, and it used to get that from inode->i_sb->s_bdev. This is correct for normal inodes mounted on ext2, ext4 and XFS filesystems, but is incorrect for DAX raw block devices and for XFS real-time files. Instead, call dax_writeback_mapping_range() directly from the filesystem ->writepages function so that it can supply us with a valid block device. This also fixes DAX code to properly flush caches in response to sync(2). Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Jens Axboe <axboe@fb.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/dax.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 7b6bced..636dd59 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -52,6 +52,8 @@ static inline bool dax_mapping(struct address_space *mapping)
{
return mapping->host && IS_DAX(mapping->host);
}
-int dax_writeback_mapping_range(struct address_space *mapping, loff_t start,
- loff_t end);
+
+struct writeback_control;
+int dax_writeback_mapping_range(struct address_space *mapping,
+ struct block_device *bdev, struct writeback_control *wbc);
#endif