@@ -3255,9 +3255,9 @@ int btrfs_writepage_cow_fixup(struct page *page);
void btrfs_writepage_endio_finish_ordered(struct btrfs_inode *inode,
struct page *page, u64 start,
u64 end, bool uptodate);
+ssize_t btrfs_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
+ size_t done_before);
extern const struct dentry_operations btrfs_dentry_operations;
-extern const struct iomap_ops btrfs_dio_iomap_ops;
-extern const struct iomap_dio_ops btrfs_dio_ops;
/* Inode locking type flags, by default the exclusive lock is taken */
#define BTRFS_ILOCK_SHARED (1U << 0)
@@ -1967,8 +1967,7 @@ static ssize_t btrfs_direct_write(struct kiocb *iocb, struct iov_iter *from)
*/
again:
from->nofault = true;
- err = iomap_dio_rw(iocb, from, &btrfs_dio_iomap_ops, &btrfs_dio_ops,
- IOMAP_DIO_PARTIAL, written);
+ err = btrfs_dio_rw(iocb, from, written);
from->nofault = false;
/* No increment (+=) because iomap returns a cumulative value. */
@@ -3719,8 +3718,7 @@ static ssize_t btrfs_direct_read(struct kiocb *iocb, struct iov_iter *to)
*/
pagefault_disable();
to->nofault = true;
- ret = iomap_dio_rw(iocb, to, &btrfs_dio_iomap_ops, &btrfs_dio_ops,
- IOMAP_DIO_PARTIAL, read);
+ ret = btrfs_dio_rw(iocb, to, read);
to->nofault = false;
pagefault_enable();
@@ -8050,15 +8050,22 @@ static void btrfs_submit_direct(const struct iomap_iter *iter,
btrfs_dio_private_put(dip);
}
-const struct iomap_ops btrfs_dio_iomap_ops = {
+static const struct iomap_ops btrfs_dio_iomap_ops = {
.iomap_begin = btrfs_dio_iomap_begin,
.iomap_end = btrfs_dio_iomap_end,
};
-const struct iomap_dio_ops btrfs_dio_ops = {
+static const struct iomap_dio_ops btrfs_dio_ops = {
.submit_io = btrfs_submit_direct,
};
+ssize_t btrfs_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
+ size_t done_before)
+{
+ return iomap_dio_rw(iocb, iter, &btrfs_dio_iomap_ops, &btrfs_dio_ops,
+ IOMAP_DIO_PARTIAL, done_before);
+}
+
static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 start, u64 len)
{
Add a wrapper around iomap_dio_rw that keeps the direct I/O internals isolated in inode.c. Signed-off-by: Christoph Hellwig <hch@lst.de> --- fs/btrfs/ctree.h | 4 ++-- fs/btrfs/file.c | 6 ++---- fs/btrfs/inode.c | 11 +++++++++-- 3 files changed, 13 insertions(+), 8 deletions(-)