148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#ifndef IOU_RSRC_H
|
|
#define IOU_RSRC_H
|
|
|
|
#include "alloc_cache.h"
|
|
|
|
#define IO_NODE_ALLOC_CACHE_MAX 32
|
|
|
|
#define IO_RSRC_TAG_TABLE_SHIFT (PAGE_SHIFT - 3)
|
|
#define IO_RSRC_TAG_TABLE_MAX (1U << IO_RSRC_TAG_TABLE_SHIFT)
|
|
#define IO_RSRC_TAG_TABLE_MASK (IO_RSRC_TAG_TABLE_MAX - 1)
|
|
|
|
enum {
|
|
IORING_RSRC_FILE = 0,
|
|
IORING_RSRC_BUFFER = 1,
|
|
};
|
|
|
|
struct io_rsrc_put {
|
|
u64 tag;
|
|
union {
|
|
void *rsrc;
|
|
struct file *file;
|
|
struct io_mapped_ubuf *buf;
|
|
};
|
|
};
|
|
|
|
typedef void (rsrc_put_fn)(struct io_ring_ctx *ctx, struct io_rsrc_put *prsrc);
|
|
|
|
struct io_rsrc_data {
|
|
struct io_ring_ctx *ctx;
|
|
|
|
u64 **tags;
|
|
unsigned int nr;
|
|
u16 rsrc_type;
|
|
bool quiesce;
|
|
};
|
|
|
|
struct io_rsrc_node {
|
|
union {
|
|
struct io_cache_entry cache;
|
|
struct io_ring_ctx *ctx;
|
|
};
|
|
int refs;
|
|
bool empty;
|
|
u16 type;
|
|
struct list_head node;
|
|
struct io_rsrc_put item;
|
|
};
|
|
|
|
struct io_mapped_ubuf {
|
|
u64 ubuf;
|
|
u64 ubuf_end;
|
|
unsigned int nr_bvecs;
|
|
unsigned long acct_pages;
|
|
struct bio_vec bvec[] __counted_by(nr_bvecs);
|
|
};
|
|
|
|
void io_rsrc_node_ref_zero(struct io_rsrc_node *node);
|
|
void io_rsrc_node_destroy(struct io_ring_ctx *ctx, struct io_rsrc_node *ref_node);
|
|
struct io_rsrc_node *io_rsrc_node_alloc(struct io_ring_ctx *ctx);
|
|
int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx, void *rsrc);
|
|
|
|
int io_import_fixed(int ddir, struct iov_iter *iter,
|
|
struct io_mapped_ubuf *imu,
|
|
u64 buf_addr, size_t len);
|
|
|
|
void __io_sqe_buffers_unregister(struct io_ring_ctx *ctx);
|
|
int io_sqe_buffers_unregister(struct io_ring_ctx *ctx);
|
|
int io_sqe_buffers_register(struct io_ring_ctx *ctx, void __user *arg,
|
|
unsigned int nr_args, u64 __user *tags);
|
|
void __io_sqe_files_unregister(struct io_ring_ctx *ctx);
|
|
int io_sqe_files_unregister(struct io_ring_ctx *ctx);
|
|
int io_sqe_files_register(struct io_ring_ctx *ctx, void __user *arg,
|
|
unsigned nr_args, u64 __user *tags);
|
|
|
|
int io_register_files_update(struct io_ring_ctx *ctx, void __user *arg,
|
|
unsigned nr_args);
|
|
int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg,
|
|
unsigned size, unsigned type);
|
|
int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
|
|
unsigned int size, unsigned int type);
|
|
|
|
static inline void io_put_rsrc_node(struct io_ring_ctx *ctx, struct io_rsrc_node *node)
|
|
{
|
|
lockdep_assert_held(&ctx->uring_lock);
|
|
|
|
if (node && !--node->refs)
|
|
io_rsrc_node_ref_zero(node);
|
|
}
|
|
|
|
static inline void io_req_put_rsrc_locked(struct io_kiocb *req,
|
|
struct io_ring_ctx *ctx)
|
|
{
|
|
io_put_rsrc_node(ctx, req->rsrc_node);
|
|
}
|
|
|
|
static inline void io_charge_rsrc_node(struct io_ring_ctx *ctx,
|
|
struct io_rsrc_node *node)
|
|
{
|
|
node->refs++;
|
|
}
|
|
|
|
static inline void __io_req_set_rsrc_node(struct io_kiocb *req,
|
|
struct io_ring_ctx *ctx)
|
|
{
|
|
lockdep_assert_held(&ctx->uring_lock);
|
|
req->rsrc_node = ctx->rsrc_node;
|
|
io_charge_rsrc_node(ctx, ctx->rsrc_node);
|
|
}
|
|
|
|
static inline void io_req_set_rsrc_node(struct io_kiocb *req,
|
|
struct io_ring_ctx *ctx,
|
|
unsigned int issue_flags)
|
|
{
|
|
if (!req->rsrc_node) {
|
|
io_ring_submit_lock(ctx, issue_flags);
|
|
__io_req_set_rsrc_node(req, ctx);
|
|
io_ring_submit_unlock(ctx, issue_flags);
|
|
}
|
|
}
|
|
|
|
static inline u64 *io_get_tag_slot(struct io_rsrc_data *data, unsigned int idx)
|
|
{
|
|
unsigned int off = idx & IO_RSRC_TAG_TABLE_MASK;
|
|
unsigned int table_idx = idx >> IO_RSRC_TAG_TABLE_SHIFT;
|
|
|
|
return &data->tags[table_idx][off];
|
|
}
|
|
|
|
static inline int io_rsrc_init(struct io_ring_ctx *ctx)
|
|
{
|
|
ctx->rsrc_node = io_rsrc_node_alloc(ctx);
|
|
return ctx->rsrc_node ? 0 : -ENOMEM;
|
|
}
|
|
|
|
int io_files_update(struct io_kiocb *req, unsigned int issue_flags);
|
|
int io_files_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
|
|
|
|
int __io_account_mem(struct user_struct *user, unsigned long nr_pages);
|
|
|
|
static inline void __io_unaccount_mem(struct user_struct *user,
|
|
unsigned long nr_pages)
|
|
{
|
|
atomic_long_sub(nr_pages, &user->locked_vm);
|
|
}
|
|
|
|
#endif
|