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authorRoss Zwisler <ross.zwisler@linux.intel.com>2015-02-16 15:59:38 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-16 17:56:04 -0800
commit923ae0ff9250430133b3310fe62c47538cf1cbc1 (patch)
tree3c4194cbedbe77e719bf7c8762fba5362ec26032 /fs/ext4/indirect.c
parent25726bc15731d42112b579cf73f30edbc43d3973 (diff)
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ext4: add DAX functionality
This is a port of the DAX functionality found in the current version of ext2. [matthew.r.wilcox@intel.com: heavily tweaked] [akpm@linux-foundation.org: remap_pages went away] Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Andreas Dilger <andreas.dilger@intel.com> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Randy Dunlap <rdunlap@infradead.org> 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/ext4/indirect.c')
-rw-r--r--fs/ext4/indirect.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 36b369697a13..6b9878a24182 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -689,14 +689,22 @@ retry:
inode_dio_done(inode);
goto locked;
}
- ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iter, offset,
- ext4_get_block, NULL, NULL, 0);
+ if (IS_DAX(inode))
+ ret = dax_do_io(rw, iocb, inode, iter, offset,
+ ext4_get_block, NULL, 0);
+ else
+ ret = __blockdev_direct_IO(rw, iocb, inode,
+ inode->i_sb->s_bdev, iter, offset,
+ ext4_get_block, NULL, NULL, 0);
inode_dio_done(inode);
} else {
locked:
- ret = blockdev_direct_IO(rw, iocb, inode, iter,
- offset, ext4_get_block);
+ if (IS_DAX(inode))
+ ret = dax_do_io(rw, iocb, inode, iter, offset,
+ ext4_get_block, NULL, DIO_LOCKING);
+ else
+ ret = blockdev_direct_IO(rw, iocb, inode, iter,
+ offset, ext4_get_block);
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);