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authorRoss Zwisler <ross.zwisler@linux.intel.com>2016-02-26 15:19:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-27 10:28:52 -0800
commit7f6d5b529b7dfe2fca30cbf4bc81e16575090025 (patch)
tree3dce0ed231dadcd470db83c1762a701004c1616b /fs/ext2/inode.c
parent20a90f58997245749c2bdfaea9e51f785ec90d0b (diff)
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 'fs/ext2/inode.c')
-rw-r--r--fs/ext2/inode.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 4467cbd75f24..6bd58e6ff038 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -876,6 +876,14 @@ ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
static int
ext2_writepages(struct address_space *mapping, struct writeback_control *wbc)
{
+#ifdef CONFIG_FS_DAX
+ if (dax_mapping(mapping)) {
+ return dax_writeback_mapping_range(mapping,
+ mapping->host->i_sb->s_bdev,
+ wbc);
+ }
+#endif
+
return mpage_writepages(mapping, wbc, ext2_get_block);
}