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Diffstat (limited to 'io_uring/rsrc.h')
-rw-r--r--io_uring/rsrc.h72
1 files changed, 32 insertions, 40 deletions
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h
index f27f4975217d..0a8a95e9b99e 100644
--- a/io_uring/rsrc.h
+++ b/io_uring/rsrc.h
@@ -4,6 +4,10 @@
#include <net/af_unix.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)
@@ -14,7 +18,6 @@ enum {
};
struct io_rsrc_put {
- struct list_head list;
u64 tag;
union {
void *rsrc;
@@ -30,19 +33,20 @@ struct io_rsrc_data {
u64 **tags;
unsigned int nr;
- rsrc_put_fn *do_put;
- atomic_t refs;
- struct completion done;
+ u16 rsrc_type;
bool quiesce;
};
struct io_rsrc_node {
- struct percpu_ref refs;
+ union {
+ struct io_cache_entry cache;
+ struct io_ring_ctx *ctx;
+ };
+ int refs;
+ bool empty;
+ u16 type;
struct list_head node;
- struct list_head rsrc_list;
- struct io_rsrc_data *rsrc_data;
- struct llist_node llist;
- bool done;
+ struct io_rsrc_put item;
};
struct io_mapped_ubuf {
@@ -54,16 +58,10 @@ struct io_mapped_ubuf {
};
void io_rsrc_put_tw(struct callback_head *cb);
-void io_rsrc_put_work(struct work_struct *work);
-void io_rsrc_refs_refill(struct io_ring_ctx *ctx);
-void io_wait_rsrc_data(struct io_rsrc_data *data);
-void io_rsrc_node_destroy(struct io_rsrc_node *ref_node);
-void io_rsrc_refs_drop(struct io_ring_ctx *ctx);
-int io_rsrc_node_switch_start(struct io_ring_ctx *ctx);
-int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx,
- struct io_rsrc_node *node, void *rsrc);
-void io_rsrc_node_switch(struct io_ring_ctx *ctx,
- struct io_rsrc_data *data_to_kill);
+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,
@@ -107,36 +105,24 @@ int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg,
int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
unsigned int size, unsigned int type);
-static inline void io_rsrc_put_node(struct io_rsrc_node *node, int nr)
+static inline void io_put_rsrc_node(struct io_ring_ctx *ctx, struct io_rsrc_node *node)
{
- percpu_ref_put_many(&node->refs, nr);
-}
+ lockdep_assert_held(&ctx->uring_lock);
-static inline void io_req_put_rsrc(struct io_kiocb *req)
-{
- if (req->rsrc_node)
- io_rsrc_put_node(req->rsrc_node, 1);
+ 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)
- __must_hold(&ctx->uring_lock)
{
- struct io_rsrc_node *node = req->rsrc_node;
-
- if (node) {
- if (node == ctx->rsrc_node)
- ctx->rsrc_cached_refs++;
- else
- io_rsrc_put_node(node, 1);
- }
+ io_put_rsrc_node(ctx, req->rsrc_node);
}
-static inline void io_charge_rsrc_node(struct io_ring_ctx *ctx)
+static inline void io_charge_rsrc_node(struct io_ring_ctx *ctx,
+ struct io_rsrc_node *node)
{
- ctx->rsrc_cached_refs--;
- if (unlikely(ctx->rsrc_cached_refs < 0))
- io_rsrc_refs_refill(ctx);
+ node->refs++;
}
static inline void io_req_set_rsrc_node(struct io_kiocb *req,
@@ -149,7 +135,7 @@ static inline void io_req_set_rsrc_node(struct io_kiocb *req,
lockdep_assert_held(&ctx->uring_lock);
req->rsrc_node = ctx->rsrc_node;
- io_charge_rsrc_node(ctx);
+ io_charge_rsrc_node(ctx, ctx->rsrc_node);
io_ring_submit_unlock(ctx, issue_flags);
}
}
@@ -162,6 +148,12 @@ static inline u64 *io_get_tag_slot(struct io_rsrc_data *data, unsigned int idx)
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);