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io_uring: move msg_ring into its own file

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Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2022-05-25 06:42:08 -06:00
parent f9ead18c10
commit 36404b09aa
4 changed files with 71 additions and 55 deletions
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2
io_uring/Makefile
View file

@ -5,5 +5,5 @@
obj-$(CONFIG_IO_URING) += io_uring.o xattr.o nop.o fs.o splice.o \
sync.o advise.o filetable.o \
openclose.o uring_cmd.o epoll.o \
statx.o net.o
statx.o net.o msg_ring.o
obj-$(CONFIG_IO_WQ) += io-wq.o

55
io_uring/io_uring.c
View file

@ -103,6 +103,7 @@
#include "epoll.h"
#include "statx.h"
#include "net.h"
#include "msg_ring.h"
#define IORING_MAX_ENTRIES 32768
#define IORING_MAX_CQ_ENTRIES (2 * IORING_MAX_ENTRIES)
@ -346,12 +347,6 @@ struct io_provide_buf {
__u16 bid;
};
struct io_msg {
struct file *file;
u64 user_data;
u32 len;
};
struct io_rw_state {
struct iov_iter iter;
struct iov_iter_state iter_state;
@ -3613,54 +3608,6 @@ static int io_write(struct io_kiocb *req, unsigned int issue_flags)
return ret;
}
static int io_msg_ring_prep(struct io_kiocb *req,
const struct io_uring_sqe *sqe)
{
struct io_msg *msg = io_kiocb_to_cmd(req);
if (unlikely(sqe->addr || sqe->rw_flags || sqe->splice_fd_in ||
sqe->buf_index || sqe->personality))
return -EINVAL;
msg->user_data = READ_ONCE(sqe->off);
msg->len = READ_ONCE(sqe->len);
return 0;
}
static int io_msg_ring(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_msg *msg = io_kiocb_to_cmd(req);
struct io_ring_ctx *target_ctx;
bool filled;
int ret;
ret = -EBADFD;
if (req->file->f_op != &io_uring_fops)
goto done;
ret = -EOVERFLOW;
target_ctx = req->file->private_data;
spin_lock(&target_ctx->completion_lock);
filled = io_fill_cqe_aux(target_ctx, msg->user_data, msg->len, 0);
io_commit_cqring(target_ctx);
spin_unlock(&target_ctx->completion_lock);
if (filled) {
io_cqring_ev_posted(target_ctx);
ret = 0;
}
done:
if (ret < 0)
req_set_fail(req);
io_req_set_res(req, ret, 0);
/* put file to avoid an attempt to IOPOLL the req */
io_put_file(req->file);
req->file = NULL;
return IOU_OK;
}
/*
* Note when io_fixed_fd_install() returns error value, it will ensure
* fput() is called correspondingly.

65
io_uring/msg_ring.c Normal file
View file

@ -0,0 +1,65 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/slab.h>
#include <linux/io_uring.h>
#include <uapi/linux/io_uring.h>
#include "io_uring_types.h"
#include "io_uring.h"
#include "msg_ring.h"
struct io_msg {
struct file *file;
u64 user_data;
u32 len;
};
int io_msg_ring_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_msg *msg = io_kiocb_to_cmd(req);
if (unlikely(sqe->addr || sqe->rw_flags || sqe->splice_fd_in ||
sqe->buf_index || sqe->personality))
return -EINVAL;
msg->user_data = READ_ONCE(sqe->off);
msg->len = READ_ONCE(sqe->len);
return 0;
}
int io_msg_ring(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_msg *msg = io_kiocb_to_cmd(req);
struct io_ring_ctx *target_ctx;
bool filled;
int ret;
ret = -EBADFD;
if (!io_is_uring_fops(req->file))
goto done;
ret = -EOVERFLOW;
target_ctx = req->file->private_data;
spin_lock(&target_ctx->completion_lock);
filled = io_fill_cqe_aux(target_ctx, msg->user_data, msg->len, 0);
io_commit_cqring(target_ctx);
spin_unlock(&target_ctx->completion_lock);
if (filled) {
io_cqring_ev_posted(target_ctx);
ret = 0;
}
done:
if (ret < 0)
req_set_fail(req);
io_req_set_res(req, ret, 0);
/* put file to avoid an attempt to IOPOLL the req */
io_put_file(req->file);
req->file = NULL;
return IOU_OK;
}

4
io_uring/msg_ring.h Normal file
View file

@ -0,0 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
int io_msg_ring_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_msg_ring(struct io_kiocb *req, unsigned int issue_flags);