1// SPDX-License-Identifier: GPL-2.0
 2#ifndef IOU_FILE_TABLE_H
 3#define IOU_FILE_TABLE_H
 4
 5#include <linux/file.h>
 6#include <linux/io_uring_types.h>
 7#include "rsrc.h"
 8
 9bool io_alloc_file_tables(struct io_ring_ctx *ctx, struct io_file_table *table, unsigned nr_files);
10void io_free_file_tables(struct io_ring_ctx *ctx, struct io_file_table *table);
11
12int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
13			struct file *file, unsigned int file_slot);
14int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file,
15				unsigned int file_slot);
16int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset);
17
18int io_register_file_alloc_range(struct io_ring_ctx *ctx,
19				 struct io_uring_file_index_range __user *arg);
20
21io_req_flags_t io_file_get_flags(struct file *file);
22
23static inline void io_file_bitmap_clear(struct io_file_table *table, int bit)
24{
25	WARN_ON_ONCE(!test_bit(bit, table->bitmap));
26	__clear_bit(bit, table->bitmap);
27	table->alloc_hint = bit;
28}
29
30static inline void io_file_bitmap_set(struct io_file_table *table, int bit)
31{
32	WARN_ON_ONCE(test_bit(bit, table->bitmap));
33	__set_bit(bit, table->bitmap);
34	table->alloc_hint = bit + 1;
35}
36
37#define FFS_NOWAIT		0x1UL
38#define FFS_ISREG		0x2UL
39#define FFS_MASK		~(FFS_NOWAIT|FFS_ISREG)
40
41static inline unsigned int io_slot_flags(struct io_rsrc_node *node)
42{
43
44	return (node->file_ptr & ~FFS_MASK) << REQ_F_SUPPORT_NOWAIT_BIT;
45}
46
47static inline struct file *io_slot_file(struct io_rsrc_node *node)
48{
49	return (struct file *)(node->file_ptr & FFS_MASK);
50}
51
52static inline void io_fixed_file_set(struct io_rsrc_node *node,
53				     struct file *file)
54{
55	node->file_ptr = (unsigned long)file |
56		(io_file_get_flags(file) >> REQ_F_SUPPORT_NOWAIT_BIT);
57}
58
59static inline void io_file_table_set_alloc_range(struct io_ring_ctx *ctx,
60						 unsigned off, unsigned len)
61{
62	ctx->file_alloc_start = off;
63	ctx->file_alloc_end = off + len;
64	ctx->file_table.alloc_hint = ctx->file_alloc_start;
65}
66
67#endif