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io_uring: simplify selected buf handling 

As selected buffers are now stored in a separate field in a request, get
rid of rw/recv specific helpers and simplify the code.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/bd4a866d8d91b044f748c40efff9e4eacd07536e.1638714983.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-12-05 14:37:58 +00:00 committed by Jens Axboe
parent 3648e5265c
commit d1fd1c201d
1 changed files with 17 additions and 27 deletions
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44
fs/io_uring.c
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@ -1273,22 +1273,24 @@ static inline void io_req_set_rsrc_node(struct io_kiocb *req,
}
}
static unsigned int io_put_kbuf(struct io_kiocb *req, struct io_buffer *kbuf)
static unsigned int __io_put_kbuf(struct io_kiocb *req)
{
struct io_buffer *kbuf = req->kbuf;
unsigned int cflags;
cflags = kbuf->bid << IORING_CQE_BUFFER_SHIFT;
cflags |= IORING_CQE_F_BUFFER;
req->flags &= ~REQ_F_BUFFER_SELECTED;
kfree(kbuf);
req->kbuf = NULL;
return cflags;
}
static inline unsigned int io_put_rw_kbuf(struct io_kiocb *req)
static inline unsigned int io_put_kbuf(struct io_kiocb *req)
{
if (likely(!(req->flags & REQ_F_BUFFER_SELECTED)))
return 0;
return io_put_kbuf(req, req->kbuf);
return __io_put_kbuf(req);
}
static void io_refs_resurrect(struct percpu_ref *ref, struct completion *compl)
@ -2532,14 +2534,14 @@ static int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin)
prev = start;
wq_list_for_each_resume(pos, prev) {
struct io_kiocb *req = container_of(pos, struct io_kiocb, comp_list);
u32 cflags;
/* order with io_complete_rw_iopoll(), e.g. ->result updates */
if (!smp_load_acquire(&req->iopoll_completed))
break;
cflags = io_put_rw_kbuf(req);
if (!(req->flags & REQ_F_CQE_SKIP))
__io_fill_cqe(ctx, req->user_data, req->result, cflags);
__io_fill_cqe(ctx, req->user_data, req->result,
io_put_kbuf(req));
nr_events++;
}
@ -2715,7 +2717,7 @@ static bool __io_complete_rw_common(struct io_kiocb *req, long res)
static void io_req_task_complete(struct io_kiocb *req, bool *locked)
{
unsigned int cflags = io_put_rw_kbuf(req);
unsigned int cflags = io_put_kbuf(req);
int res = req->result;
if (*locked) {
@ -2731,7 +2733,7 @@ static void __io_complete_rw(struct io_kiocb *req, long res, long res2,
{
if (__io_complete_rw_common(req, res))
return;
__io_req_complete(req, issue_flags, req->result, io_put_rw_kbuf(req));
__io_req_complete(req, issue_flags, req->result, io_put_kbuf(req));
}
static void io_complete_rw(struct kiocb *kiocb, long res)
@ -4979,11 +4981,6 @@ static struct io_buffer *io_recv_buffer_select(struct io_kiocb *req,
return io_buffer_select(req, &sr->len, sr->bgid, issue_flags);
}
static inline unsigned int io_put_recv_kbuf(struct io_kiocb *req)
{
return io_put_kbuf(req, req->kbuf);
}
static int io_recvmsg_prep_async(struct io_kiocb *req)
{
int ret;
@ -5021,8 +5018,7 @@ static int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags)
struct socket *sock;
struct io_buffer *kbuf;
unsigned flags;
int min_ret = 0;
int ret, cflags = 0;
int ret, min_ret = 0;
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
sock = sock_from_file(req->file);
@ -5066,13 +5062,11 @@ static int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags)
req_set_fail(req);
}
if (req->flags & REQ_F_BUFFER_SELECTED)
cflags = io_put_recv_kbuf(req);
/* fast path, check for non-NULL to avoid function call */
if (kmsg->free_iov)
kfree(kmsg->free_iov);
req->flags &= ~REQ_F_NEED_CLEANUP;
__io_req_complete(req, issue_flags, ret, cflags);
__io_req_complete(req, issue_flags, ret, io_put_kbuf(req));
return 0;
}
@ -5085,8 +5079,7 @@ static int io_recv(struct io_kiocb *req, unsigned int issue_flags)
struct socket *sock;
struct iovec iov;
unsigned flags;
int min_ret = 0;
int ret, cflags = 0;
int ret, min_ret = 0;
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
sock = sock_from_file(req->file);
@ -5128,9 +5121,8 @@ out_free:
} else if ((flags & MSG_WAITALL) && (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) {
req_set_fail(req);
}
if (req->flags & REQ_F_BUFFER_SELECTED)
cflags = io_put_recv_kbuf(req);
__io_req_complete(req, issue_flags, ret, cflags);
__io_req_complete(req, issue_flags, ret, io_put_kbuf(req));
return 0;
}
@ -6578,10 +6570,8 @@ fail:
static void io_clean_op(struct io_kiocb *req)
{
if (req->flags & REQ_F_BUFFER_SELECTED) {
kfree(req->kbuf);
req->kbuf = NULL;
}
if (req->flags & REQ_F_BUFFER_SELECTED)
io_put_kbuf(req);
if (req->flags & REQ_F_NEED_CLEANUP) {
switch (req->opcode) {