diff options
Diffstat (limited to 'include/linux/uio.h')
| -rw-r--r-- | include/linux/uio.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h index 5896af36199c..9f158238edba 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -29,6 +29,9 @@ enum iter_type { ITER_UBUF, }; +#define ITER_SOURCE 1 // == WRITE +#define ITER_DEST 0 // == READ + struct iov_iter_state { size_t iov_offset; size_t count; @@ -247,8 +250,14 @@ void iov_iter_pipe(struct iov_iter *i, unsigned int direction, struct pipe_inode void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count); void iov_iter_xarray(struct iov_iter *i, unsigned int direction, struct xarray *xarray, loff_t start, size_t count); +ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages, + size_t maxsize, unsigned maxpages, size_t *start, + unsigned gup_flags); ssize_t iov_iter_get_pages2(struct iov_iter *i, struct page **pages, size_t maxsize, unsigned maxpages, size_t *start); +ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, + struct page ***pages, size_t maxsize, size_t *start, + unsigned gup_flags); ssize_t iov_iter_get_pages_alloc2(struct iov_iter *i, struct page ***pages, size_t maxsize, size_t *start); int iov_iter_npages(const struct iov_iter *i, int maxpages); @@ -298,7 +307,7 @@ iov_iter_npages_cap(struct iov_iter *i, int maxpages, size_t max_bytes) shorted = iov_iter_count(i) - max_bytes; iov_iter_truncate(i, max_bytes); } - npages = iov_iter_npages(i, INT_MAX); + npages = iov_iter_npages(i, maxpages); if (shorted) iov_iter_reexpand(i, iov_iter_count(i) + shorted); |