projects/linux·blob assoc-array-fixes · refs

66 lines · 1.9 KiB

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