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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849// 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, 0);
io_req_set_res(req, ret, 0); return IOU_COMPLETE;}