forked from mirrors/linux
4bfb0c9af8
Remove all the open coded magic on slot->file_ptr by introducing two helpers that return the file pointer and the flags instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230620113235.920399-9-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#ifndef IOU_FILE_TABLE_H
|
|
#define IOU_FILE_TABLE_H
|
|
|
|
#include <linux/file.h>
|
|
#include <linux/io_uring_types.h>
|
|
|
|
bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files);
|
|
void io_free_file_tables(struct io_file_table *table);
|
|
|
|
int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
|
|
struct file *file, unsigned int file_slot);
|
|
int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file,
|
|
unsigned int file_slot);
|
|
int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset);
|
|
|
|
int io_register_file_alloc_range(struct io_ring_ctx *ctx,
|
|
struct io_uring_file_index_range __user *arg);
|
|
|
|
unsigned int io_file_get_flags(struct file *file);
|
|
|
|
static inline void io_file_bitmap_clear(struct io_file_table *table, int bit)
|
|
{
|
|
WARN_ON_ONCE(!test_bit(bit, table->bitmap));
|
|
__clear_bit(bit, table->bitmap);
|
|
table->alloc_hint = bit;
|
|
}
|
|
|
|
static inline void io_file_bitmap_set(struct io_file_table *table, int bit)
|
|
{
|
|
WARN_ON_ONCE(test_bit(bit, table->bitmap));
|
|
__set_bit(bit, table->bitmap);
|
|
table->alloc_hint = bit + 1;
|
|
}
|
|
|
|
static inline struct io_fixed_file *
|
|
io_fixed_file_slot(struct io_file_table *table, unsigned i)
|
|
{
|
|
return &table->files[i];
|
|
}
|
|
|
|
#define FFS_NOWAIT 0x1UL
|
|
#define FFS_ISREG 0x2UL
|
|
#define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG)
|
|
|
|
static inline unsigned int io_slot_flags(struct io_fixed_file *slot)
|
|
{
|
|
return (slot->file_ptr & ~FFS_MASK) << REQ_F_SUPPORT_NOWAIT_BIT;
|
|
}
|
|
|
|
static inline struct file *io_slot_file(struct io_fixed_file *slot)
|
|
{
|
|
return (struct file *)(slot->file_ptr & FFS_MASK);
|
|
}
|
|
|
|
static inline struct file *io_file_from_index(struct io_file_table *table,
|
|
int index)
|
|
{
|
|
return io_slot_file(io_fixed_file_slot(table, index));
|
|
}
|
|
|
|
static inline void io_fixed_file_set(struct io_fixed_file *file_slot,
|
|
struct file *file)
|
|
{
|
|
file_slot->file_ptr = (unsigned long)file |
|
|
(io_file_get_flags(file) >> REQ_F_SUPPORT_NOWAIT_BIT);
|
|
}
|
|
|
|
static inline void io_reset_alloc_hint(struct io_ring_ctx *ctx)
|
|
{
|
|
ctx->file_table.alloc_hint = ctx->file_alloc_start;
|
|
}
|
|
|
|
static inline void io_file_table_set_alloc_range(struct io_ring_ctx *ctx,
|
|
unsigned off, unsigned len)
|
|
{
|
|
ctx->file_alloc_start = off;
|
|
ctx->file_alloc_end = off + len;
|
|
io_reset_alloc_hint(ctx);
|
|
}
|
|
|
|
#endif
|