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Destroy TCP UMA zones (empty or not) upon network stack teardown

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to not leak them, otherwise making UMA/vmstat unhappy with every stoped vnet.
We will still leak pages (especially for zones marked NOFREE).

Reshuffle cleanup order in tcp_destroy() to get rid of what we can
easily free first.

Sponsored by:	ISPsystem
Reviewed by:	rwatson
MFC after:	5 days
This commit is contained in:
Bjoern A. Zeeb 2010-03-07 15:58:44 +00:00
parent e253cdd07c
commit 376aadf896
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=204838
4 changed files with 21 additions and 1 deletions
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9
sys/netinet/tcp_reass.c
View File

@ -132,6 +132,15 @@ tcp_reass_init(void)
tcp_reass_zone_change, NULL, EVENTHANDLER_PRI_ANY);
}
#ifdef VIMAGE
void
tcp_reass_destroy(void)
{
uma_zdestroy(V_tcp_reass_zone);
}
#endif
int
tcp_reass(struct tcpcb *tp, struct tcphdr *th, int *tlenp, struct mbuf *m)
{

8
sys/netinet/tcp_subr.c
View File

@ -459,15 +459,21 @@ void
tcp_destroy(void)
{
tcp_tw_destroy();
tcp_reass_destroy();
tcp_hc_destroy();
syncache_destroy();
tcp_tw_destroy();
/* XXX check that hashes are empty! */
hashdestroy(V_tcbinfo.ipi_hashbase, M_PCB,
V_tcbinfo.ipi_hashmask);
hashdestroy(V_tcbinfo.ipi_porthashbase, M_PCB,
V_tcbinfo.ipi_porthashmask);
uma_zdestroy(V_sack_hole_zone);
uma_zdestroy(V_tcpcb_zone);
uma_zdestroy(V_tcbinfo.ipi_zone);
INP_INFO_LOCK_DESTROY(&V_tcbinfo);
}
#endif

2
sys/netinet/tcp_timewait.c
View File

@ -185,6 +185,8 @@ tcp_tw_destroy(void)
while((tw = TAILQ_FIRST(&V_twq_2msl)) != NULL)
tcp_twclose(tw, 0);
INP_INFO_WUNLOCK(&V_tcbinfo);
uma_zdestroy(V_tcptw_zone);
}
#endif

3
sys/netinet/tcp_var.h
View File

@ -657,6 +657,9 @@ char *tcp_log_addrs(struct in_conninfo *, struct tcphdr *, void *,
const void *);
int tcp_reass(struct tcpcb *, struct tcphdr *, int *, struct mbuf *);
void tcp_reass_init(void);
#ifdef VIMAGE
void tcp_reass_destroy(void);
#endif
void tcp_input(struct mbuf *, int);
u_long tcp_maxmtu(struct in_conninfo *, int *);
u_long tcp_maxmtu6(struct in_conninfo *, int *);