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3597f2786b
For files, there's nr_user_files/file_table/file_data, and buffers have nr_user_bufs/user_bufs/buf_data. There's no reason why file_table and file_data can't be the same thing, and ditto for the buffer side. That gets rid of more io_ring_ctx state that's in two spots rather than just being in one spot, as it should be. Put all the registered file data in one locations, and ditto on the buffer front. This also avoids having both io_rsrc_data->nodes being an allocated array, and ->user_bufs[] or ->file_table.nodes. There's no reason to have this information duplicated. Keep it in one spot, io_rsrc_data, along with how many resources are available. Signed-off-by: Jens Axboe <axboe@kernel.dk>
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef IOU_FILE_TABLE_H
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#define IOU_FILE_TABLE_H
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#include <linux/file.h>
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#include <linux/io_uring_types.h>
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#include "rsrc.h"
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bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files);
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void io_free_file_tables(struct io_file_table *table);
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int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
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struct file *file, unsigned int file_slot);
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int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file,
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unsigned int file_slot);
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int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset);
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int io_register_file_alloc_range(struct io_ring_ctx *ctx,
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struct io_uring_file_index_range __user *arg);
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io_req_flags_t io_file_get_flags(struct file *file);
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static inline void io_file_bitmap_clear(struct io_file_table *table, int bit)
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{
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WARN_ON_ONCE(!test_bit(bit, table->bitmap));
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__clear_bit(bit, table->bitmap);
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table->alloc_hint = bit;
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}
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static inline void io_file_bitmap_set(struct io_file_table *table, int bit)
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{
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WARN_ON_ONCE(test_bit(bit, table->bitmap));
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__set_bit(bit, table->bitmap);
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table->alloc_hint = bit + 1;
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}
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#define FFS_NOWAIT 0x1UL
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#define FFS_ISREG 0x2UL
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#define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG)
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static inline unsigned int io_slot_flags(struct io_rsrc_node *node)
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{
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return (node->file_ptr & ~FFS_MASK) << REQ_F_SUPPORT_NOWAIT_BIT;
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}
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static inline struct file *io_slot_file(struct io_rsrc_node *node)
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{
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return (struct file *)(node->file_ptr & FFS_MASK);
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}
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static inline struct file *io_file_from_index(struct io_file_table *table,
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int index)
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{
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struct io_rsrc_node *node = table->data.nodes[index];
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if (node)
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return io_slot_file(node);
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return NULL;
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}
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static inline void io_fixed_file_set(struct io_rsrc_node *node,
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struct file *file)
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{
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node->file_ptr = (unsigned long)file |
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(io_file_get_flags(file) >> REQ_F_SUPPORT_NOWAIT_BIT);
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}
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static inline void io_reset_alloc_hint(struct io_ring_ctx *ctx)
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{
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ctx->file_table.alloc_hint = ctx->file_alloc_start;
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}
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static inline void io_file_table_set_alloc_range(struct io_ring_ctx *ctx,
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unsigned off, unsigned len)
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{
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ctx->file_alloc_start = off;
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ctx->file_alloc_end = off + len;
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io_reset_alloc_hint(ctx);
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}
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#endif
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