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| author | Dave Chinner <dchinner@redhat.com> | 2015-06-04 01:19:15 +0200 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2015-06-04 01:19:15 +0200 |
| commit | 6e1ba0bcb84b3f97616feb07c27f974509ba57be (patch) | |
| tree | cafd16deba445ed386582259721a3e14f33733a7 /fs/xfs | |
| parent | xfs: add DAX truncate support (diff) | |
| download | linux-6e1ba0bcb84b3f97616feb07c27f974509ba57be.tar.xz linux-6e1ba0bcb84b3f97616feb07c27f974509ba57be.zip | |
xfs: add DAX IO path support
DAX does not do buffered IO (can't buffer direct access!) and hence
all read/write IO is vectored through the direct IO path. Hence we
need to add the DAX IO path callouts to the direct IO
infrastructure.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_aops.c | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 1d195e80d62e..e5e9fc23f230 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -1657,6 +1657,29 @@ xfs_end_io_dax_write( void xfs_end_io_dax_write(struct buffer_head *bh, int uptodate) { } #endif +static inline ssize_t +xfs_vm_do_dio( + struct inode *inode, + struct kiocb *iocb, + struct iov_iter *iter, + loff_t offset, + void (*endio)(struct kiocb *iocb, + loff_t offset, + ssize_t size, + void *private), + int flags) +{ + struct block_device *bdev; + + if (IS_DAX(inode)) + return dax_do_io(iocb, inode, iter, offset, + xfs_get_blocks_direct, endio, 0); + + bdev = xfs_find_bdev_for_inode(inode); + return __blockdev_direct_IO(iocb, inode, bdev, iter, offset, + xfs_get_blocks_direct, endio, NULL, flags); +} + STATIC ssize_t xfs_vm_direct_IO( struct kiocb *iocb, @@ -1664,16 +1687,11 @@ xfs_vm_direct_IO( loff_t offset) { struct inode *inode = iocb->ki_filp->f_mapping->host; - struct block_device *bdev = xfs_find_bdev_for_inode(inode); - if (iov_iter_rw(iter) == WRITE) { - return __blockdev_direct_IO(iocb, inode, bdev, iter, offset, - xfs_get_blocks_direct, - xfs_end_io_direct_write, NULL, - DIO_ASYNC_EXTEND); - } - return __blockdev_direct_IO(iocb, inode, bdev, iter, offset, - xfs_get_blocks_direct, NULL, NULL, 0); + if (iov_iter_rw(iter) == WRITE) + return xfs_vm_do_dio(inode, iocb, iter, offset, + xfs_end_io_direct_write, DIO_ASYNC_EXTEND); + return xfs_vm_do_dio(inode, iocb, iter, offset, NULL, 0); } /* |