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Date: Tue, 19 May 2020 10:57:11 +0200
From: Björn Töpel <bjorn.topel@...il.com>
To: ast@...nel.org, daniel@...earbox.net, davem@...emloft.net,
kuba@...nel.org, hawk@...nel.org, john.fastabend@...il.com,
netdev@...r.kernel.org, bpf@...r.kernel.org,
magnus.karlsson@...el.com, jonathan.lemon@...il.com,
jeffrey.t.kirsher@...el.com
Cc: Björn Töpel <bjorn.topel@...el.com>,
maximmi@...lanox.com, maciej.fijalkowski@...el.com
Subject: [PATCH bpf-next v3 02/15] xsk: move xskmap.c to net/xdp/
From: Björn Töpel <bjorn.topel@...el.com>
The XSKMAP is partly implemented by net/xdp/xsk.c. Move xskmap.c from
kernel/bpf/ to net/xdp/, which is the logical place for AF_XDP related
code. Also, move AF_XDP struct definitions, and function declarations
only used by AF_XDP internals into net/xdp/xsk.h.
Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
---
include/net/xdp_sock.h | 20 --------------------
kernel/bpf/Makefile | 3 ---
net/xdp/Makefile | 2 +-
net/xdp/xsk.h | 16 ++++++++++++++++
{kernel/bpf => net/xdp}/xskmap.c | 2 ++
5 files changed, 19 insertions(+), 24 deletions(-)
rename {kernel/bpf => net/xdp}/xskmap.c (99%)
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
index 6b1137ce1692..8f3f6f5b0dfe 100644
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -65,22 +65,12 @@ struct xdp_umem {
struct list_head xsk_tx_list;
};
-/* Nodes are linked in the struct xdp_sock map_list field, and used to
- * track which maps a certain socket reside in.
- */
-
struct xsk_map {
struct bpf_map map;
spinlock_t lock; /* Synchronize map updates */
struct xdp_sock *xsk_map[];
};
-struct xsk_map_node {
- struct list_head node;
- struct xsk_map *map;
- struct xdp_sock **map_entry;
-};
-
struct xdp_sock {
/* struct sock must be the first member of struct xdp_sock */
struct sock sk;
@@ -114,7 +104,6 @@ struct xdp_sock {
struct xdp_buff;
#ifdef CONFIG_XDP_SOCKETS
int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
-bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
/* Used from netdev driver */
bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt);
bool xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
@@ -133,10 +122,6 @@ void xsk_clear_rx_need_wakeup(struct xdp_umem *umem);
void xsk_clear_tx_need_wakeup(struct xdp_umem *umem);
bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem);
-void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
- struct xdp_sock **map_entry);
-int xsk_map_inc(struct xsk_map *map);
-void xsk_map_put(struct xsk_map *map);
int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp);
void __xsk_map_flush(void);
@@ -248,11 +233,6 @@ static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
return -ENOTSUPP;
}
-static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
-{
- return false;
-}
-
static inline bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt)
{
return false;
diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile
index 37b2d8620153..375b933010dd 100644
--- a/kernel/bpf/Makefile
+++ b/kernel/bpf/Makefile
@@ -12,9 +12,6 @@ obj-$(CONFIG_BPF_JIT) += dispatcher.o
ifeq ($(CONFIG_NET),y)
obj-$(CONFIG_BPF_SYSCALL) += devmap.o
obj-$(CONFIG_BPF_SYSCALL) += cpumap.o
-ifeq ($(CONFIG_XDP_SOCKETS),y)
-obj-$(CONFIG_BPF_SYSCALL) += xskmap.o
-endif
obj-$(CONFIG_BPF_SYSCALL) += offload.o
endif
ifeq ($(CONFIG_PERF_EVENTS),y)
diff --git a/net/xdp/Makefile b/net/xdp/Makefile
index 71e2bdafb2ce..90b5460d6166 100644
--- a/net/xdp/Makefile
+++ b/net/xdp/Makefile
@@ -1,3 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_XDP_SOCKETS) += xsk.o xdp_umem.o xsk_queue.o
+obj-$(CONFIG_XDP_SOCKETS) += xsk.o xdp_umem.o xsk_queue.o xskmap.o
obj-$(CONFIG_XDP_SOCKETS_DIAG) += xsk_diag.o
diff --git a/net/xdp/xsk.h b/net/xdp/xsk.h
index 4cfd106bdb53..d6a0979050e6 100644
--- a/net/xdp/xsk.h
+++ b/net/xdp/xsk.h
@@ -17,9 +17,25 @@ struct xdp_mmap_offsets_v1 {
struct xdp_ring_offset_v1 cr;
};
+/* Nodes are linked in the struct xdp_sock map_list field, and used to
+ * track which maps a certain socket reside in.
+ */
+
+struct xsk_map_node {
+ struct list_head node;
+ struct xsk_map *map;
+ struct xdp_sock **map_entry;
+};
+
static inline struct xdp_sock *xdp_sk(struct sock *sk)
{
return (struct xdp_sock *)sk;
}
+bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
+void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
+ struct xdp_sock **map_entry);
+int xsk_map_inc(struct xsk_map *map);
+void xsk_map_put(struct xsk_map *map);
+
#endif /* XSK_H_ */
diff --git a/kernel/bpf/xskmap.c b/net/xdp/xskmap.c
similarity index 99%
rename from kernel/bpf/xskmap.c
rename to net/xdp/xskmap.c
index 2cc5c8f4c800..1dc7208c71ba 100644
--- a/kernel/bpf/xskmap.c
+++ b/net/xdp/xskmap.c
@@ -9,6 +9,8 @@
#include <linux/slab.h>
#include <linux/sched.h>
+#include "xsk.h"
+
int xsk_map_inc(struct xsk_map *map)
{
bpf_map_inc(&map->map);
--
2.25.1
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