On Mon, Aug 09, 2021 at 08:12:28AM +0200, Christoph Hellwig wrote: > Switch iomap_file_unshare to use iomap_iter. > > Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]> --D > --- > fs/iomap/buffered-io.c | 35 ++++++++++++++++++----------------- > 1 file changed, 18 insertions(+), 17 deletions(-) > > diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c > index 4c7e82928cc546..4f525727462f33 100644 > --- a/fs/iomap/buffered-io.c > +++ b/fs/iomap/buffered-io.c > @@ -817,10 +817,12 @@ iomap_file_buffered_write(struct kiocb *iocb, struct > iov_iter *i, > } > EXPORT_SYMBOL_GPL(iomap_file_buffered_write); > > -static loff_t > -iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void > *data, > - struct iomap *iomap, struct iomap *srcmap) > +static loff_t iomap_unshare_iter(struct iomap_iter *iter) > { > + struct iomap *iomap = &iter->iomap; > + struct iomap *srcmap = iomap_iter_srcmap(iter); > + loff_t pos = iter->pos; > + loff_t length = iomap_length(iter); > long status = 0; > loff_t written = 0; > > @@ -836,12 +838,12 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, > loff_t length, void *data, > unsigned long bytes = min_t(loff_t, PAGE_SIZE - offset, length); > struct page *page; > > - status = iomap_write_begin(inode, pos, bytes, > + status = iomap_write_begin(iter->inode, pos, bytes, > IOMAP_WRITE_F_UNSHARE, &page, iomap, srcmap); > if (unlikely(status)) > return status; > > - status = iomap_write_end(inode, pos, bytes, bytes, page, iomap, > + status = iomap_write_end(iter->inode, pos, bytes, bytes, page, > iomap, > srcmap); > if (WARN_ON_ONCE(status == 0)) > return -EIO; > @@ -852,7 +854,7 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, > loff_t length, void *data, > written += status; > length -= status; > > - balance_dirty_pages_ratelimited(inode->i_mapping); > + balance_dirty_pages_ratelimited(iter->inode->i_mapping); > } while (length); > > return written; > @@ -862,18 +864,17 @@ int > iomap_file_unshare(struct inode *inode, loff_t pos, loff_t len, > const struct iomap_ops *ops) > { > - loff_t ret; > - > - while (len) { > - ret = iomap_apply(inode, pos, len, IOMAP_WRITE, ops, NULL, > - iomap_unshare_actor); > - if (ret <= 0) > - return ret; > - pos += ret; > - len -= ret; > - } > + struct iomap_iter iter = { > + .inode = inode, > + .pos = pos, > + .len = len, > + .flags = IOMAP_WRITE, > + }; > + int ret; > > - return 0; > + while ((ret = iomap_iter(&iter, ops)) > 0) > + iter.processed = iomap_unshare_iter(&iter); > + return ret; > } > EXPORT_SYMBOL_GPL(iomap_file_unshare); > > -- > 2.30.2 >
