diff options
| author | Jens Axboe <axboe@kernel.dk> | 2023-01-05 22:07:30 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-01-09 06:59:17 +0300 |
| commit | 2ad9bd8332ac1bc072cc7d785e7cb09d6ad36f4c (patch) | |
| tree | ed34d7b63923379b890e9b6ff9d185b95dad1d7c /lib/iov_iter.c | |
| parent | b7bfaa761d760e72a969d116517eaa12e404c262 (diff) | |
| download | linux-2ad9bd8332ac1bc072cc7d785e7cb09d6ad36f4c.tar.xz | |
iov: add import_ubuf()
Like import_single_range(), but for ITER_UBUF.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'lib/iov_iter.c')
| -rw-r--r-- | lib/iov_iter.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index f9a3ff37ecd1..f036760b66e2 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1877,6 +1877,17 @@ int import_single_range(int rw, void __user *buf, size_t len, } EXPORT_SYMBOL(import_single_range); +int import_ubuf(int rw, void __user *buf, size_t len, struct iov_iter *i) +{ + if (len > MAX_RW_COUNT) + len = MAX_RW_COUNT; + if (unlikely(!access_ok(buf, len))) + return -EFAULT; + + iov_iter_ubuf(i, rw, buf, len); + return 0; +} + /** * iov_iter_restore() - Restore a &struct iov_iter to the same state as when * iov_iter_save_state() was called. |