include/linux/uio.h

145  * Total number of bytes covered by an iovec.
162 				  size_t bytes, struct iov_iter *i);
163 void iov_iter_advance(struct iov_iter *i, size_t bytes);
164 void iov_iter_revert(struct iov_iter *i, size_t bytes);
165 size_t fault_in_iov_iter_readable(const struct iov_iter *i, size_t bytes);
166 size_t fault_in_iov_iter_writeable(const struct iov_iter *i, size_t bytes);
168 size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
170 size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
173 size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
174 size_t _copy_from_iter(void *addr, size_t bytes, struct iov_iter *i);
175 size_t _copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i);
178 		size_t bytes, struct iov_iter *i)
180 	return copy_page_to_iter(&folio->page, offset, bytes, i);
184 		size_t offset, size_t bytes, struct iov_iter *i)
186 	return copy_page_from_iter_atomic(&folio->page, offset, bytes, i);
190 				 size_t bytes, struct iov_iter *i);
193 size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i)
195 	if (check_copy_size(addr, bytes, true))
196 		return _copy_to_iter(addr, bytes, i);
201 size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i)
203 	if (check_copy_size(addr, bytes, false))
204 		return _copy_from_iter(addr, bytes, i);
209 bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i)
211 	size_t copied = copy_from_iter(addr, bytes, i);
212 	if (likely(copied == bytes))
219 size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i)
221 	if (check_copy_size(addr, bytes, false))
222 		return _copy_from_iter_nocache(addr, bytes, i);
227 bool copy_from_iter_full_nocache(void *addr, size_t bytes, struct iov_iter *i)
229 	size_t copied = copy_from_iter_nocache(addr, bytes, i);
230 	if (likely(copied == bytes))
243 size_t _copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i);
249 size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
254 size_t iov_iter_zero(size_t bytes, struct iov_iter *);