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io_uring/rsrc: encode node type and ctx together

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Rather than keep the type field separate rom ctx, use the fact that we
can encode up to 4 types of nodes in the LSB of the ctx pointer. Doesn't
reclaim any space right now on 64-bit archs, but it leaves a full int
for future use.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2024-11-03 08:17:28 -07:00
parent 01ee194d1a
commit 6af82f7614
2 changed files with 19 additions and 9 deletions
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17
io_uring/rsrc.h
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@@ -11,12 +11,13 @@
enum {
IORING_RSRC_FILE = 0,
IORING_RSRC_BUFFER = 1,
IORING_RSRC_TYPE_MASK = 0x3UL,
};
struct io_rsrc_node {
struct io_ring_ctx *ctx;
unsigned long ctx_ptr;
int refs;
u16 type;
u64 tag;
union {
@@ -100,11 +101,21 @@ static inline void io_req_put_rsrc_nodes(struct io_kiocb *req)
req->rsrc_nodes[IORING_RSRC_BUFFER] = NULL;
}
static inline struct io_ring_ctx *io_rsrc_node_ctx(struct io_rsrc_node *node)
{
return (struct io_ring_ctx *) (node->ctx_ptr & ~IORING_RSRC_TYPE_MASK);
}
static inline int io_rsrc_node_type(struct io_rsrc_node *node)
{
return node->ctx_ptr & IORING_RSRC_TYPE_MASK;
}
static inline void io_req_assign_rsrc_node(struct io_kiocb *req,
struct io_rsrc_node *node)
{
node->refs++;
req->rsrc_nodes[node->type] = node;
req->rsrc_nodes[io_rsrc_node_type(node)] = node;
}
int io_files_update(struct io_kiocb *req, unsigned int issue_flags);