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git.ipfire.org Git - thirdparty/linux.git/blob - io_uring/advise.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
3 #include <linux/errno.h>
5 #include <linux/file.h>
7 #include <linux/slab.h>
8 #include <linux/namei.h>
9 #include <linux/io_uring.h>
11 #include <uapi/linux/fadvise.h>
12 #include <uapi/linux/io_uring.h>
31 int io_madvise_prep(struct io_kiocb
*req
, const struct io_uring_sqe
*sqe
)
33 #if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU)
34 struct io_madvise
*ma
= io_kiocb_to_cmd(req
, struct io_madvise
);
36 if (sqe
->buf_index
|| sqe
->off
|| sqe
->splice_fd_in
)
39 ma
->addr
= READ_ONCE(sqe
->addr
);
40 ma
->len
= READ_ONCE(sqe
->len
);
41 ma
->advice
= READ_ONCE(sqe
->fadvise_advice
);
48 int io_madvise(struct io_kiocb
*req
, unsigned int issue_flags
)
50 #if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU)
51 struct io_madvise
*ma
= io_kiocb_to_cmd(req
, struct io_madvise
);
54 if (issue_flags
& IO_URING_F_NONBLOCK
)
57 ret
= do_madvise(current
->mm
, ma
->addr
, ma
->len
, ma
->advice
);
58 io_req_set_res(req
, ret
, 0);
65 int io_fadvise_prep(struct io_kiocb
*req
, const struct io_uring_sqe
*sqe
)
67 struct io_fadvise
*fa
= io_kiocb_to_cmd(req
, struct io_fadvise
);
69 if (sqe
->buf_index
|| sqe
->addr
|| sqe
->splice_fd_in
)
72 fa
->offset
= READ_ONCE(sqe
->off
);
73 fa
->len
= READ_ONCE(sqe
->len
);
74 fa
->advice
= READ_ONCE(sqe
->fadvise_advice
);
78 int io_fadvise(struct io_kiocb
*req
, unsigned int issue_flags
)
80 struct io_fadvise
*fa
= io_kiocb_to_cmd(req
, struct io_fadvise
);
83 if (issue_flags
& IO_URING_F_NONBLOCK
) {
85 case POSIX_FADV_NORMAL
:
86 case POSIX_FADV_RANDOM
:
87 case POSIX_FADV_SEQUENTIAL
:
94 ret
= vfs_fadvise(req
->file
, fa
->offset
, fa
->len
, fa
->advice
);
97 io_req_set_res(req
, ret
, 0);