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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #ifndef IOU_FILE_TABLE_H | |
3 | #define IOU_FILE_TABLE_H | |
4 | ||
024f15e0 | 5 | #include <linux/file.h> |
6e73dffb | 6 | #include <linux/io_uring_types.h> |
453b329b | 7 | |
453b329b JA |
8 | #define FFS_NOWAIT 0x1UL |
9 | #define FFS_ISREG 0x2UL | |
38eddb2c | 10 | #define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG) |
453b329b | 11 | |
453b329b JA |
12 | bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files); |
13 | void io_free_file_tables(struct io_file_table *table); | |
c98817e6 JA |
14 | |
15 | int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags, | |
16 | struct file *file, unsigned int file_slot); | |
f110ed84 JA |
17 | int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file, |
18 | unsigned int file_slot); | |
19 | int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset); | |
453b329b | 20 | |
6e73dffb PB |
21 | int io_register_file_alloc_range(struct io_ring_ctx *ctx, |
22 | struct io_uring_file_index_range __user *arg); | |
23 | ||
a4ad4f74 JA |
24 | unsigned int io_file_get_flags(struct file *file); |
25 | ||
453b329b JA |
26 | static inline void io_file_bitmap_clear(struct io_file_table *table, int bit) |
27 | { | |
4d505951 | 28 | WARN_ON_ONCE(!test_bit(bit, table->bitmap)); |
453b329b JA |
29 | __clear_bit(bit, table->bitmap); |
30 | table->alloc_hint = bit; | |
31 | } | |
32 | ||
33 | static inline void io_file_bitmap_set(struct io_file_table *table, int bit) | |
34 | { | |
35 | WARN_ON_ONCE(test_bit(bit, table->bitmap)); | |
36 | __set_bit(bit, table->bitmap); | |
37 | table->alloc_hint = bit + 1; | |
38 | } | |
39 | ||
40 | static inline struct io_fixed_file * | |
41 | io_fixed_file_slot(struct io_file_table *table, unsigned i) | |
42 | { | |
43 | return &table->files[i]; | |
44 | } | |
45 | ||
a4ad4f74 JA |
46 | static inline struct file *io_file_from_index(struct io_file_table *table, |
47 | int index) | |
48 | { | |
49 | struct io_fixed_file *slot = io_fixed_file_slot(table, index); | |
50 | ||
51 | return (struct file *) (slot->file_ptr & FFS_MASK); | |
52 | } | |
53 | ||
54 | static inline void io_fixed_file_set(struct io_fixed_file *file_slot, | |
55 | struct file *file) | |
56 | { | |
57 | unsigned long file_ptr = (unsigned long) file; | |
58 | ||
59 | file_ptr |= io_file_get_flags(file); | |
60 | file_slot->file_ptr = file_ptr; | |
61 | } | |
62 | ||
6e73dffb PB |
63 | static inline void io_reset_alloc_hint(struct io_ring_ctx *ctx) |
64 | { | |
65 | ctx->file_table.alloc_hint = ctx->file_alloc_start; | |
66 | } | |
67 | ||
68 | static inline void io_file_table_set_alloc_range(struct io_ring_ctx *ctx, | |
69 | unsigned off, unsigned len) | |
70 | { | |
71 | ctx->file_alloc_start = off; | |
72 | ctx->file_alloc_end = off + len; | |
73 | io_reset_alloc_hint(ctx); | |
74 | } | |
75 | ||
453b329b | 76 | #endif |