| 1 | |
| 2 | #include <linux/kernel.h>
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| 3 | #include <linux/errno.h>
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| 4 | #include <linux/fs.h>
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| 5 | #include <linux/file.h>
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| 6 | #include <linux/mm.h>
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| 7 | #include <linux/slab.h>
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| 8 | #include <linux/syscalls.h>
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| 9 | #include <linux/io_uring.h>
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| 10 |
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| 11 | #include <uapi/linux/io_uring.h>
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| 12 |
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| 13 | #include "../fs/internal.h"
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| 14 |
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| 15 | #include "io_uring.h"
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| 16 | #include "truncate.h"
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| 17 |
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| 18 | struct io_ftrunc {
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| 19 | struct file *file;
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| 20 | loff_t len;
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| 21 | };
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| 22 |
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| 23 | int io_ftruncate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
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| 24 | {
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| 25 | struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
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| 26 |
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| 27 | if (sqe->rw_flags || sqe->addr || sqe->len || sqe->buf_index ||
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| 28 | sqe->splice_fd_in || sqe->addr3)
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| 29 | return -EINVAL;
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| 30 |
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| 31 | ft->len = READ_ONCE(sqe->off);
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| 32 |
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| 33 | req->flags |= REQ_F_FORCE_ASYNC;
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| 34 | return 0;
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| 35 | }
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| 36 |
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| 37 | int io_ftruncate(struct io_kiocb *req, unsigned int issue_flags)
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| 38 | {
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| 39 | struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
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| 40 | int ret;
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| 41 |
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| 42 | WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
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| 43 |
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| 44 | ret = do_ftruncate(req->file, ft->len, 0);
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| 45 |
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| 46 | io_req_set_res(req, ret, 0);
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| 47 | return IOU_COMPLETE;
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| 48 | }
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