A future patch hides the internals of struct iov_iter, so fuse should
be using the supported interface.
Signed-off-by: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
Acked-by: Miklos Szeredi <mszeredi@xxxxxxx>
Cc: fuse-devel@xxxxxxxxxxxxxxxxxxxxx
---
fs/fuse/file.c | 29 ++++++++---------------------
1 file changed, 8 insertions(+), 21 deletions(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 78d2837..4e42e95 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1631,30 +1631,17 @@ static int fuse_ioctl_copy_user(struct page **pages, struct iovec *iov,
while (iov_iter_count(&ii)) {
struct page *page = pages[page_idx++];
size_t todo = min_t(size_t, PAGE_SIZE, iov_iter_count(&ii));
- void *kaddr;
+ size_t left;
- kaddr = kmap(page);
-
- while (todo) {
- char __user *uaddr = ii.iov->iov_base + ii.iov_offset;
- size_t iov_len = ii.iov->iov_len - ii.iov_offset;
- size_t copy = min(todo, iov_len);
- size_t left;
-
- if (!to_user)
- left = copy_from_user(kaddr, uaddr, copy);
- else
- left = copy_to_user(uaddr, kaddr, copy);
-
- if (unlikely(left))
- return -EFAULT;
+ if (!to_user)
+ left = iov_iter_copy_from_user(page, &ii, 0, todo);
+ else
+ left = iov_iter_copy_to_user(page, &ii, 0, todo);
- iov_iter_advance(&ii, copy);
- todo -= copy;
- kaddr += copy;
- }
+ if (unlikely(left))
+ return -EFAULT;
- kunmap(page);
+ iov_iter_advance(&ii, todo);
}
return 0;
--
1.8.0
--
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