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tcp: Move socket pool declarations around

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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
same memory in different ways 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@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2023-02-14 10:48:21 +11:00 • committed by Stefano Brivio
parent c8993476d5
commit 912d37cd5b
4 changed files with 55 additions and 48 deletions

10
tcp_conn.h
View file

@ -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 */