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start adding the tag to iov_iter

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For now, just use the same thing we pass to ->direct_IO() - it's all
iovec-based at the moment.  Pass it explicitly to iov_iter_init() and
account for kvec vs. iovec in there, by the same kludge NFS ->direct_IO()
uses.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2014-03-05 19:28:09 -05:00
parent ed978a811e
commit 71d8e532b1
15 changed files with 41 additions and 35 deletions
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15
include/linux/uio.h
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@@ -20,6 +20,7 @@ struct kvec {
};
struct iov_iter {
int type;
const struct iovec *iov;
unsigned long nr_segs;
size_t iov_offset;
@@ -68,18 +69,8 @@ size_t iov_iter_single_seg_count(const struct iov_iter *i);
size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
struct iov_iter *i);
unsigned long iov_iter_alignment(const struct iov_iter *i);
static inline void iov_iter_init(struct iov_iter *i,
const struct iovec *iov, unsigned long nr_segs,
size_t count, size_t written)
{
i->iov = iov;
i->nr_segs = nr_segs;
i->iov_offset = 0;
i->count = count + written;
iov_iter_advance(i, written);
}
void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov,
unsigned long nr_segs, size_t count);
static inline size_t iov_iter_count(struct iov_iter *i)
{