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tcp: More type safety for tcp_flow_migrate_target_ext()

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tcp_flow_migrate_target_ext() takes a raw union flow *, although it is TCP
specific, and requires a FLOW_TYPE_TCP entry.  Our usual convention is that
such functions should take a struct tcp_tap_conn * instead.  Convert it to
do so.

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 2025-02-18 19:59:21 +11:00 • committed by Stefano Brivio
parent 5a07eb3ccc
commit e56c8038fc
3 changed files with 5 additions and 6 deletions

2
flow.c
View file

@ -1106,7 +1106,7 @@ int flow_migrate_target(struct ctx *c, const struct migrate_stage *stage,
repair_flush(c);
for (i = 0; i < count; i++) {
rc = tcp_flow_migrate_target_ext(c, flowtab + i, fd);
rc = tcp_flow_migrate_target_ext(c, &flowtab[i].tcp, fd);
if (rc) {
debug("Migration data failure at flow %u: %s, abort",
i, strerror_(-rc));

7
tcp.c
View file

@ -3394,14 +3394,13 @@ int tcp_flow_migrate_target(struct ctx *c, int fd)
/**
* tcp_flow_migrate_target_ext() - Receive extended data for flow, set, connect
* @c: Execution context
* @flow: Existing flow for this connection data
* @conn: Connection entry to complete with extra data
* @fd: Descriptor for state migration
*
* Return: 0 on success, negative on fatal failure, but 0 on single flow failure
*/
int tcp_flow_migrate_target_ext(struct ctx *c, union flow *flow, int fd)
int tcp_flow_migrate_target_ext(struct ctx *c, struct tcp_tap_conn *conn, int fd)
{
struct tcp_tap_conn *conn = &flow->tcp;
uint32_t peek_offset = conn->seq_to_tap - conn->seq_ack_from_tap;
struct tcp_tap_transfer_ext t;
int s = conn->sock, rc;
@ -3413,7 +3412,7 @@ int tcp_flow_migrate_target_ext(struct ctx *c, union flow *flow, int fd)
}
if (!t.tcpi_state) { /* Source wants us to skip this flow */
flow_err(flow, "Dropping as requested by source");
flow_err(conn, "Dropping as requested by source");
goto fail;
}

2
tcp_conn.h
View file

@ -239,7 +239,7 @@ int tcp_flow_migrate_source_ext(int fd, int fidx,
const struct tcp_tap_conn *conn);
int tcp_flow_migrate_target(struct ctx *c, int fd);
int tcp_flow_migrate_target_ext(struct ctx *c, union flow *flow, int fd);
int tcp_flow_migrate_target_ext(struct ctx *c, struct tcp_tap_conn *conn, int fd);
bool tcp_flow_is_established(const struct tcp_tap_conn *conn);