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Subject[PATCH 2/4] io_uring: do build_open_how() only once
Date
build_open_how() is just adjusting open_flags/mode. Do it once during
prep. It looks better than storing raw values for the future.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 7208f91e9e77..cdfffc23e10a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2988,6 +2988,7 @@ static int io_fallocate(struct io_kiocb *req, bool force_nonblock)
static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
const char __user *fname;
+ u64 flags, mode;
int ret;

if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL)))
@@ -2999,13 +3000,14 @@ static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (req->flags & REQ_F_NEED_CLEANUP)
return 0;

- req->open.dfd = READ_ONCE(sqe->fd);
- req->open.how.mode = READ_ONCE(sqe->len);
- fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
- req->open.how.flags = READ_ONCE(sqe->open_flags);
+ mode = READ_ONCE(sqe->len);
+ flags = READ_ONCE(sqe->open_flags);
if (force_o_largefile())
- req->open.how.flags |= O_LARGEFILE;
+ flags |= O_LARGEFILE;
+ req->open.how = build_open_how(flags, mode);

+ req->open.dfd = READ_ONCE(sqe->fd);
+ fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
req->open.filename = getname(fname);
if (IS_ERR(req->open.filename)) {
ret = PTR_ERR(req->open.filename);
@@ -3099,7 +3101,6 @@ static int io_openat2(struct io_kiocb *req, bool force_nonblock)

static int io_openat(struct io_kiocb *req, bool force_nonblock)
{
- req->open.how = build_open_how(req->open.how.flags, req->open.how.mode);
return io_openat2(req, force_nonblock);
}

--
2.24.0
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