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1// SPDX-License-Identifier: GPL-2.02#ifndef IOU_FILE_TABLE_H3#define IOU_FILE_TABLE_H4 5#include <linux/file.h>6#include <linux/io_uring_types.h>7 8bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files);9void io_free_file_tables(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) HWJS_SUSPENDS;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 36static inline struct io_fixed_file *37io_fixed_file_slot(struct io_file_table *table, unsigned i)38{39 return &table->files[i];40}41 42#define FFS_NOWAIT 0x1UL43#define FFS_ISREG 0x2UL44#define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG)45 46static 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 51static inline struct file *io_slot_file(struct io_fixed_file *slot)52{53 return (struct file *)(slot->file_ptr & FFS_MASK);54}55 56static 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 62static 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 69static inline void io_reset_alloc_hint(struct io_ring_ctx *ctx)70{71 ctx->file_table.alloc_hint = ctx->file_alloc_start;72}73 74static 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#endif83