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 | |
8 | bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files); |
9 | void io_free_file_tables(struct io_file_table *table); |
10 | |
11 | int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags, |
12 | struct file *file, unsigned int file_slot); |
13 | int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file, |
14 | unsigned int file_slot); |
15 | int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset); |
16 | |
17 | int io_register_file_alloc_range(struct io_ring_ctx *ctx, |
18 | struct io_uring_file_index_range __user *arg); |
19 | |
20 | unsigned int io_file_get_flags(struct file *file); |
21 | |
22 | static 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 | |
29 | static 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 | static inline struct io_fixed_file * |
37 | io_fixed_file_slot(struct io_file_table *table, unsigned i) |
38 | { |
39 | return &table->files[i]; |
40 | } |
41 | |
42 | #define FFS_NOWAIT 0x1UL |
43 | #define FFS_ISREG 0x2UL |
44 | #define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG) |
45 | |
46 | static inline unsigned int io_slot_flags(struct io_fixed_file *slot) |
47 | { |
48 | return (slot->file_ptr & ~FFS_MASK) << REQ_F_SUPPORT_NOWAIT_BIT; |
49 | } |
50 | |
51 | static inline struct file *io_slot_file(struct io_fixed_file *slot) |
52 | { |
53 | return (struct file *)(slot->file_ptr & FFS_MASK); |
54 | } |
55 | |
56 | static inline struct file *io_file_from_index(struct io_file_table *table, |
57 | int index) |
58 | { |
59 | return io_slot_file(slot: io_fixed_file_slot(table, i: index)); |
60 | } |
61 | |
62 | static inline void io_fixed_file_set(struct io_fixed_file *file_slot, |
63 | struct file *file) |
64 | { |
65 | file_slot->file_ptr = (unsigned long)file | |
66 | (io_file_get_flags(file) >> REQ_F_SUPPORT_NOWAIT_BIT); |
67 | } |
68 | |
69 | static inline void io_reset_alloc_hint(struct io_ring_ctx *ctx) |
70 | { |
71 | ctx->file_table.alloc_hint = ctx->file_alloc_start; |
72 | } |
73 | |
74 | static inline void io_file_table_set_alloc_range(struct io_ring_ctx *ctx, |
75 | unsigned off, unsigned len) |
76 | { |
77 | ctx->file_alloc_start = off; |
78 | ctx->file_alloc_end = off + len; |
79 | io_reset_alloc_hint(ctx); |
80 | } |
81 | |
82 | #endif |
83 | |