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(io_fixed_file_slot(table, 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