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io_uring: introduce struct iou_vec

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I need a convenient way to pass around and work with iovec+size pair,
put them into a structure and makes use of it in rw.c

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d39fadafc9e9047b0a292e5be6db3cf2f48bb1f7.1741362889.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2025-03-07 16:00:29 +00:00
committed by Jens Axboe
parent 6e3da40ed6
commit e1d4995909
5 changed files with 39 additions and 12 deletions
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16
io_uring/rsrc.h
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@@ -145,4 +145,20 @@ static inline void __io_unaccount_mem(struct user_struct *user,
atomic_long_sub(nr_pages, &user->locked_vm);
}
void io_vec_free(struct iou_vec *iv);
static inline void io_vec_reset_iovec(struct iou_vec *iv,
struct iovec *iovec, unsigned nr)
{
io_vec_free(iv);
iv->iovec = iovec;
iv->nr = nr;
}
static inline void io_alloc_cache_vec_kasan(struct iou_vec *iv)
{
if (IS_ENABLED(CONFIG_KASAN))
io_vec_free(iv);
}
#endif