22 static inline int iomap_iter_advance(struct iomap_iter *iter)  in iomap_iter_advance()  argument
24 	bool stale = iter->iomap.flags & IOMAP_F_STALE;  in iomap_iter_advance()
27 	if (iter->iomap.length) {  in iomap_iter_advance()
28 		if (iter->processed < 0)  in iomap_iter_advance()
29 			return iter->processed;  in iomap_iter_advance()
30 		if (!iter->processed && !stale)  in iomap_iter_advance()
32 		if (WARN_ON_ONCE(iter->processed > iomap_length(iter)))  in iomap_iter_advance()
34 		iter->pos += iter->processed;  in iomap_iter_advance()
35 		iter->len -= iter->processed;  in iomap_iter_advance()
36 		if (!iter->len)  in iomap_iter_advance()
41 	iter->processed = 0;  in iomap_iter_advance()
42 	memset(&iter->iomap, 0, sizeof(iter->iomap));  in iomap_iter_advance()
43 	memset(&iter->srcmap, 0, sizeof(iter->srcmap));  in iomap_iter_advance()
47 static inline void iomap_iter_done(struct iomap_iter *iter)  in iomap_iter_done()  argument
49 	WARN_ON_ONCE(iter->iomap.offset > iter->pos);  in iomap_iter_done()
50 	WARN_ON_ONCE(iter->iomap.length == 0);  in iomap_iter_done()
51 	WARN_ON_ONCE(iter->iomap.offset + iter->iomap.length <= iter->pos);  in iomap_iter_done()
52 	WARN_ON_ONCE(iter->iomap.flags & IOMAP_F_STALE);  in iomap_iter_done()
54 	trace_iomap_iter_dstmap(iter->inode, &iter->iomap);  in iomap_iter_done()
55 	if (iter->srcmap.type != IOMAP_HOLE)  in iomap_iter_done()
56 		trace_iomap_iter_srcmap(iter->inode, &iter->srcmap);  in iomap_iter_done()
74 int iomap_iter(struct iomap_iter *iter, const struct iomap_ops *ops)  in iomap_iter()  argument
78 	if (iter->iomap.length && ops->iomap_end) {  in iomap_iter()
79 		ret = ops->iomap_end(iter->inode, iter->pos, iomap_length(iter),  in iomap_iter()
80 				iter->processed > 0 ? iter->processed : 0,  in iomap_iter()
81 				iter->flags, &iter->iomap);  in iomap_iter()
82 		if (ret < 0 && !iter->processed)  in iomap_iter()
86 	trace_iomap_iter(iter, ops, _RET_IP_);  in iomap_iter()
87 	ret = iomap_iter_advance(iter);  in iomap_iter()
91 	ret = ops->iomap_begin(iter->inode, iter->pos, iter->len, iter->flags,  in iomap_iter()
92 			       &iter->iomap, &iter->srcmap);  in iomap_iter()
95 	iomap_iter_done(iter);  in iomap_iter()