linux/io_uring/filetable.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/nospec.h>
#include <linux/io_uring.h>

#include <uapi/linux/io_uring.h>

#include "io_uring.h"
#include "rsrc.h"
#include "filetable.h"

static int io_file_bitmap_get(struct io_ring_ctx *ctx)
{ … }

bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files)
{ … }

void io_free_file_tables(struct io_file_table *table)
{ … }

static int io_install_fixed_file(struct io_ring_ctx *ctx, struct file *file,
				 u32 slot_index)
	__must_hold(&req->ctx->uring_lock)
{ … }

int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file,
			  unsigned int file_slot)
{ … }
/*
 * Note when io_fixed_fd_install() returns error value, it will ensure
 * fput() is called correspondingly.
 */
int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
			struct file *file, unsigned int file_slot)
{ … }

int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset)
{ … }

int io_register_file_alloc_range(struct io_ring_ctx *ctx,
				 struct io_uring_file_index_range __user *arg)
{ … }