diff options
Diffstat (limited to 'io_uring/rsrc.h')
-rw-r--r-- | io_uring/rsrc.h | 82 |
1 files changed, 36 insertions, 46 deletions
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h index 2b8743645efc..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, @@ -144,15 +130,13 @@ static inline void io_req_set_rsrc_node(struct io_kiocb *req, unsigned int issue_flags) { if (!req->rsrc_node) { - req->rsrc_node = ctx->rsrc_node; + io_ring_submit_lock(ctx, issue_flags); - if (!(issue_flags & IO_URING_F_UNLOCKED)) { - lockdep_assert_held(&ctx->uring_lock); + lockdep_assert_held(&ctx->uring_lock); - io_charge_rsrc_node(ctx); - } else { - percpu_ref_get(&req->rsrc_node->refs); - } + req->rsrc_node = ctx->rsrc_node; + io_charge_rsrc_node(ctx, ctx->rsrc_node); + io_ring_submit_unlock(ctx, issue_flags); } } @@ -164,6 +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); |