mirror of
https://github.com/torvalds/linux.git
synced 2025-10-31 08:38:45 +02:00
b4bb1900c1
Adds support for doing truncate through io_uring, eliminating the need for applications to roll their own thread pool or offload mechanism to be able to do non-blocking truncates. Signed-off-by: Tony Solomonik <tony.solomonik@gmail.com> Link: https://lore.kernel.org/r/20240202121724.17461-3-tony.solomonik@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
48 lines
1 KiB
C
48 lines
1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/file.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/io_uring.h>
|
|
|
|
#include <uapi/linux/io_uring.h>
|
|
|
|
#include "../fs/internal.h"
|
|
|
|
#include "io_uring.h"
|
|
#include "truncate.h"
|
|
|
|
struct io_ftrunc {
|
|
struct file *file;
|
|
loff_t len;
|
|
};
|
|
|
|
int io_ftruncate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
|
{
|
|
struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
|
|
|
|
if (sqe->rw_flags || sqe->addr || sqe->len || sqe->buf_index ||
|
|
sqe->splice_fd_in || sqe->addr3)
|
|
return -EINVAL;
|
|
|
|
ft->len = READ_ONCE(sqe->off);
|
|
|
|
req->flags |= REQ_F_FORCE_ASYNC;
|
|
return 0;
|
|
}
|
|
|
|
int io_ftruncate(struct io_kiocb *req, unsigned int issue_flags)
|
|
{
|
|
struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
|
|
int ret;
|
|
|
|
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
|
|
|
|
ret = do_ftruncate(req->file, ft->len, 1);
|
|
|
|
io_req_set_res(req, ret, 0);
|
|
return IOU_OK;
|
|
}
|