From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>,
[email protected], [email protected]
Subject: [PATCH 3/4] io_uring: deduplicate io_openat{,2}_prep()
Date: Tue, 2 Jun 2020 15:34:03 +0300 [thread overview]
Message-ID: <ad8a7956e99a4aee62ca353c53746a93e608bed5.1591100205.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>
io_openat_prep() and io_openat2_prep() are identical except for how
struct open_how is built. Deduplicate it with a helper.
Signed-off-by: Pavel Begunkov <[email protected]>
---
fs/io_uring.c | 55 ++++++++++++++++++---------------------------------
1 file changed, 19 insertions(+), 36 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index cdfffc23e10a..9fe90a66a31e 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2985,26 +2985,21 @@ static int io_fallocate(struct io_kiocb *req, bool force_nonblock)
return 0;
}
-static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+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)))
return -EINVAL;
- if (sqe->ioprio || sqe->buf_index)
+ if (unlikely(sqe->ioprio || sqe->buf_index))
return -EINVAL;
- if (req->flags & REQ_F_FIXED_FILE)
+ if (unlikely(req->flags & REQ_F_FIXED_FILE))
return -EBADF;
- if (req->flags & REQ_F_NEED_CLEANUP)
- return 0;
- mode = READ_ONCE(sqe->len);
- flags = READ_ONCE(sqe->open_flags);
- if (force_o_largefile())
- flags |= O_LARGEFILE;
- req->open.how = build_open_how(flags, mode);
+ /* open.how should be already initialised */
+ if (!(req->open.how.flags & O_PATH) && force_o_largefile())
+ req->open.how.flags |= O_LARGEFILE;
req->open.dfd = READ_ONCE(sqe->fd);
fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
@@ -3014,33 +3009,33 @@ static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
req->open.filename = NULL;
return ret;
}
-
req->open.nofile = rlimit(RLIMIT_NOFILE);
req->flags |= REQ_F_NEED_CLEANUP;
return 0;
}
+static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+ u64 flags, mode;
+
+ if (req->flags & REQ_F_NEED_CLEANUP)
+ return 0;
+ mode = READ_ONCE(sqe->len);
+ flags = READ_ONCE(sqe->open_flags);
+ req->open.how = build_open_how(flags, mode);
+ return __io_openat_prep(req, sqe);
+}
+
static int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct open_how __user *how;
- const char __user *fname;
size_t len;
int ret;
- if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL)))
- return -EINVAL;
- if (sqe->ioprio || sqe->buf_index)
- return -EINVAL;
- if (req->flags & REQ_F_FIXED_FILE)
- return -EBADF;
if (req->flags & REQ_F_NEED_CLEANUP)
return 0;
-
- req->open.dfd = READ_ONCE(sqe->fd);
- fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
how = u64_to_user_ptr(READ_ONCE(sqe->addr2));
len = READ_ONCE(sqe->len);
-
if (len < OPEN_HOW_SIZE_VER0)
return -EINVAL;
@@ -3049,19 +3044,7 @@ static int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (ret)
return ret;
- if (!(req->open.how.flags & O_PATH) && force_o_largefile())
- req->open.how.flags |= O_LARGEFILE;
-
- req->open.filename = getname(fname);
- if (IS_ERR(req->open.filename)) {
- ret = PTR_ERR(req->open.filename);
- req->open.filename = NULL;
- return ret;
- }
-
- req->open.nofile = rlimit(RLIMIT_NOFILE);
- req->flags |= REQ_F_NEED_CLEANUP;
- return 0;
+ return __io_openat_prep(req, sqe);
}
static int io_openat2(struct io_kiocb *req, bool force_nonblock)
--
2.24.0
next prev parent reply other threads:[~2020-06-02 12:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-02 12:34 [PATCH 0/4] forbid using open/close/statx with {SQ,IO}POLL Pavel Begunkov
2020-06-02 12:34 ` [PATCH 1/4] io_uring: fix " Pavel Begunkov
2020-06-02 14:12 ` Pavel Begunkov
2020-06-02 12:34 ` [PATCH 2/4] io_uring: do build_open_how() only once Pavel Begunkov
2020-06-02 12:34 ` Pavel Begunkov [this message]
2020-06-02 12:34 ` [PATCH 4/4] io_uring: move send/recv IOPOLL check into prep Pavel Begunkov
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