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99 lines
2.1 KiB
99 lines
2.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/fs.h> |
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#include <linux/file.h> |
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#include <linux/mm.h> |
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#include <linux/slab.h> |
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#include <linux/namei.h> |
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#include <linux/io_uring.h> |
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#include <uapi/linux/fadvise.h> |
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#include <uapi/linux/io_uring.h> |
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#include "io_uring.h" |
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#include "advise.h" |
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struct io_fadvise { |
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struct file *file; |
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u64 offset; |
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u32 len; |
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u32 advice; |
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}; |
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struct io_madvise { |
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struct file *file; |
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u64 addr; |
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u32 len; |
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u32 advice; |
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}; |
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int io_madvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
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{ |
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#if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU) |
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struct io_madvise *ma = io_kiocb_to_cmd(req, struct io_madvise); |
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if (sqe->buf_index || sqe->off || sqe->splice_fd_in) |
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return -EINVAL; |
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ma->addr = READ_ONCE(sqe->addr); |
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ma->len = READ_ONCE(sqe->len); |
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ma->advice = READ_ONCE(sqe->fadvise_advice); |
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return 0; |
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#else |
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return -EOPNOTSUPP; |
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#endif |
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} |
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int io_madvise(struct io_kiocb *req, unsigned int issue_flags) |
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{ |
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#if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU) |
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struct io_madvise *ma = io_kiocb_to_cmd(req, struct io_madvise); |
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int ret; |
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if (issue_flags & IO_URING_F_NONBLOCK) |
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return -EAGAIN; |
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ret = do_madvise(current->mm, ma->addr, ma->len, ma->advice); |
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io_req_set_res(req, ret, 0); |
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return IOU_OK; |
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#else |
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return -EOPNOTSUPP; |
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#endif |
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} |
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int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
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{ |
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struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise); |
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if (sqe->buf_index || sqe->addr || sqe->splice_fd_in) |
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return -EINVAL; |
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fa->offset = READ_ONCE(sqe->off); |
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fa->len = READ_ONCE(sqe->len); |
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fa->advice = READ_ONCE(sqe->fadvise_advice); |
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return 0; |
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} |
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int io_fadvise(struct io_kiocb *req, unsigned int issue_flags) |
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{ |
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struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise); |
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int ret; |
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if (issue_flags & IO_URING_F_NONBLOCK) { |
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switch (fa->advice) { |
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case POSIX_FADV_NORMAL: |
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case POSIX_FADV_RANDOM: |
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case POSIX_FADV_SEQUENTIAL: |
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break; |
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default: |
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return -EAGAIN; |
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} |
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} |
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ret = vfs_fadvise(req->file, fa->offset, fa->len, fa->advice); |
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if (ret < 0) |
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req_set_fail(req); |
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io_req_set_res(req, ret, 0); |
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return IOU_OK; |
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}
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