tcp_splice.c has some explicit extern declarations to access the socket
pools. This is pretty dangerous - if we changed the type of these
variables in tcp.c, we'd have tcp.c and tcp_splice.c using the memory
differently with no compiler error. So, move the extern declarations to
tcp_conn.h so they're visible to both tcp.c and tcp_splice.c, but not the
rest of pasta.
In fact the pools for the guest namespace are necessarily only used by
tcp_splice.c - we have no sockets on the guest side if we're not splicing.
So move those declarations - and the functions that deal exclusively with
them - to tcp_splice.c
Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>
---
tcp.c | 41 ++++-------------------------------------
tcp.h | 2 --
tcp_conn.h | 10 ++++++++--
tcp_splice.c | 50 +++++++++++++++++++++++++++++++++++++++++++-------
4 files changed, 55 insertions(+), 48 deletions(-)
diff --git a/tcp.c b/tcp.c
index 4da823c..19fd17b 100644
--- a/tcp.c
+++ b/tcp.c
@@ -370,8 +370,6 @@ struct tcp6_l2_head { /* For MSS6 macro: keep in sync with
tcp6_l2_buf_t */
#define FIN_TIMEOUT 60
#define ACT_TIMEOUT 7200
-#define TCP_SOCK_POOL_TSH 16 /* Refill in ns if > x used */
-
#define LOW_RTT_TABLE_SIZE 8
#define LOW_RTT_THRESHOLD 10 /* us */
@@ -595,11 +593,9 @@ static inline struct tcp_tap_conn *conn_at_idx(int index)
/* Table for lookup from remote address, local port, remote port */
static struct tcp_tap_conn *tc_hash[TCP_HASH_TABLE_SIZE];
-/* Pools for pre-opened sockets */
+/* Pools for pre-opened sockets (init namespace) */
int init_sock_pool4 [TCP_SOCK_POOL_SIZE];
int init_sock_pool6 [TCP_SOCK_POOL_SIZE];
-int ns_sock_pool4 [TCP_SOCK_POOL_SIZE];
-int ns_sock_pool6 [TCP_SOCK_POOL_SIZE];
/**
* tcp_conn_epoll_events() - epoll events mask for given connection state
@@ -2988,7 +2984,7 @@ static int tcp_ns_socks_init(void *arg)
* @pool: Pool of sockets to refill
* @af: Address family to use
*/
-static void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af)
+void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af)
{
int i;
@@ -3022,26 +3018,6 @@ static void tcp_sock_refill_init(const struct ctx *c)
tcp_sock_refill_pool(c, init_sock_pool6, AF_INET6);
}
-/**
- * tcp_sock_refill_ns() - Refill pools of pre-opened sockets in namespace
- * @arg: Execution context cast to void *
- *
- * Return: 0
- */
-static int tcp_sock_refill_ns(void *arg)
-{
- const struct ctx *c = (const struct ctx *)arg;
-
- ns_enter(c);
-
- if (c->ifi4)
- tcp_sock_refill_pool(c, ns_sock_pool4, AF_INET);
- if (c->ifi6)
- tcp_sock_refill_pool(c, ns_sock_pool6, AF_INET6);
-
- return 0;
-}
-
/**
* tcp_init() - Get initial sequence, hash secret, initialise per-socket data
* @c: Execution context
@@ -3090,8 +3066,6 @@ int tcp_init(struct ctx *c)
memset(init_sock_pool4, 0xff, sizeof(init_sock_pool4));
memset(init_sock_pool6, 0xff, sizeof(init_sock_pool6));
- memset(ns_sock_pool4, 0xff, sizeof(ns_sock_pool4));
- memset(ns_sock_pool6, 0xff, sizeof(ns_sock_pool6));
memset(tcp_sock_init_ext, 0xff, sizeof(tcp_sock_init_ext));
memset(tcp_sock_ns, 0xff, sizeof(tcp_sock_ns));
@@ -3101,8 +3075,6 @@ int tcp_init(struct ctx *c)
tcp_splice_init(c);
NS_CALL(tcp_ns_socks_init, c);
-
- NS_CALL(tcp_sock_refill_ns, c);
}
return 0;
@@ -3255,11 +3227,6 @@ void tcp_timer(struct ctx *c, const struct timespec *ts)
}
tcp_sock_refill_init(c);
- if (c->mode == MODE_PASTA) {
- if ((c->ifi4 && ns_sock_pool4[TCP_SOCK_POOL_TSH] < 0) ||
- (c->ifi6 && ns_sock_pool6[TCP_SOCK_POOL_TSH] < 0))
- NS_CALL(tcp_sock_refill_ns, c);
-
- tcp_splice_pipe_refill(c);
- }
+ if (c->mode == MODE_PASTA)
+ tcp_splice_refill(c);
}
diff --git a/tcp.h b/tcp.h
index 739b451..236038f 100644
--- a/tcp.h
+++ b/tcp.h
@@ -11,8 +11,6 @@
#define TCP_CONN_INDEX_BITS 17 /* 128k */
#define TCP_MAX_CONNS (1 << TCP_CONN_INDEX_BITS)
-#define TCP_SOCK_POOL_SIZE 32
-
struct ctx;
void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
diff --git a/tcp_conn.h b/tcp_conn.h
index 70f4a7c..9951b0a 100644
--- a/tcp_conn.h
+++ b/tcp_conn.h
@@ -182,11 +182,17 @@ union tcp_conn {
/* TCP connections */
extern union tcp_conn tc[];
+/* Socket pools */
+#define TCP_SOCK_POOL_SIZE 32
+
+extern int init_sock_pool4 [TCP_SOCK_POOL_SIZE];
+extern int init_sock_pool6 [TCP_SOCK_POOL_SIZE];
+
void tcp_splice_conn_update(struct ctx *c, struct tcp_splice_conn *new);
void tcp_table_compact(struct ctx *c, union tcp_conn *hole);
void tcp_splice_destroy(struct ctx *c, union tcp_conn *conn_union);
void tcp_splice_timer(struct ctx *c, union tcp_conn *conn_union);
-void tcp_splice_pipe_refill(const struct ctx *c);
-
+void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af);
+void tcp_splice_refill(const struct ctx *c);
#endif /* TCP_CONN_H */
diff --git a/tcp_splice.c b/tcp_splice.c
index 72b1672..688d776 100644
--- a/tcp_splice.c
+++ b/tcp_splice.c
@@ -61,11 +61,11 @@
#define TCP_SPLICE_CONN_PRESSURE 30 /* % of conn_count */
#define TCP_SPLICE_FILE_PRESSURE 30 /* % of c->nofile */
-/* From tcp.c */
-extern int init_sock_pool4 [TCP_SOCK_POOL_SIZE];
-extern int init_sock_pool6 [TCP_SOCK_POOL_SIZE];
-extern int ns_sock_pool4 [TCP_SOCK_POOL_SIZE];
-extern int ns_sock_pool6 [TCP_SOCK_POOL_SIZE];
+/* Pools for pre-opened sockets (guest namespace) */
+#define TCP_SOCK_POOL_TSH 16 /* Refill in ns if > x used */
+
+static int ns_sock_pool4 [TCP_SOCK_POOL_SIZE];
+static int ns_sock_pool6 [TCP_SOCK_POOL_SIZE];
/* Pool of pre-opened pipes */
static int splice_pipe_pool [TCP_SPLICE_PIPE_POOL_SIZE][2][2];
@@ -783,7 +783,7 @@ smaller:
* tcp_splice_pipe_refill() - Refill pool of pre-opened pipes
* @c: Execution context
*/
-void tcp_splice_pipe_refill(const struct ctx *c)
+static void tcp_splice_pipe_refill(const struct ctx *c)
{
int i;
@@ -812,6 +812,39 @@ void tcp_splice_pipe_refill(const struct ctx *c)
}
}
+/**
+ * tcp_sock_refill_ns() - Refill pools of pre-opened sockets in namespace
+ * @arg: Execution context cast to void *
+ *
+ * Return: 0
+ */
+static int tcp_sock_refill_ns(void *arg)
+{
+ const struct ctx *c = (const struct ctx *)arg;
+
+ ns_enter(c);
+
+ if (c->ifi4)
+ tcp_sock_refill_pool(c, ns_sock_pool4, AF_INET);
+ if (c->ifi6)
+ tcp_sock_refill_pool(c, ns_sock_pool6, AF_INET6);
+
+ return 0;
+}
+
+/**
+ * tcp_splice_refill() - Refill pools of resources needed for splicing
+ * @c: Execution context
+ */
+void tcp_splice_refill(const struct ctx *c)
+{
+ if ((c->ifi4 && ns_sock_pool4[TCP_SOCK_POOL_TSH] < 0) ||
+ (c->ifi6 && ns_sock_pool6[TCP_SOCK_POOL_TSH] < 0))
+ NS_CALL(tcp_sock_refill_ns, c);
+
+ tcp_splice_pipe_refill(c);
+}
+
/**
* tcp_splice_init() - Initialise pipe pool and size
* @c: Execution context
@@ -820,7 +853,10 @@ void tcp_splice_init(struct ctx *c)
{
memset(splice_pipe_pool, 0xff, sizeof(splice_pipe_pool));
tcp_set_pipe_size(c);
- tcp_splice_pipe_refill(c);
+
+ memset(&ns_sock_pool4, 0xff, sizeof(ns_sock_pool4));
+ memset(&ns_sock_pool6, 0xff, sizeof(ns_sock_pool6));
+ NS_CALL(tcp_sock_refill_ns, c);
}
/**
--
2.39.0