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uipc_mbuf.c: do a better job of counting how often we have to wait

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for memory, or are denied a cluster.

uipc_socket2.c: define some generic ``operation-not-supported'' entry points
for pr_usrreqs.
This commit is contained in:
Garrett Wollman 1997-02-18 20:43:07 +00:00
parent 2e3507efc7
commit d8392c6c39
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=22899
3 changed files with 86 additions and 6 deletions
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22
sys/kern/uipc_mbuf.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)uipc_mbuf.c 8.2 (Berkeley) 1/4/94
* $FreeBSD$
* $Id$
*/
#include <sys/param.h>
@ -118,7 +118,12 @@ m_mballoc(nmb, nowait)
return (0);
nbytes = round_page(nmb * MSIZE);
p = (caddr_t)kmem_malloc(mb_map, nbytes, nowait ? M_NOWAIT : M_WAITOK);
p = (caddr_t)kmem_malloc(mb_map, nbytes, M_NOWAIT);
if (p == 0 && !nowait) {
mbstat.m_wait++;
p = (caddr_t)kmem_malloc(mb_map, nbytes, M_WAITOK);
}
/*
* Either the map is now full, or this is nowait and there
* are no pages left.
@ -137,9 +142,9 @@ m_mballoc(nmb, nowait)
}
#if MCLBYTES > PAGE_SIZE
int i_want_my_mcl;
static int i_want_my_mcl;
void
static void
kproc_mclalloc(void)
{
int status;
@ -184,13 +189,16 @@ m_clalloc(ncl, nowait)
* to get any more (nothing is ever freed back to the
* map).
*/
if (mb_map_full)
if (mb_map_full) {
mbstat.m_drops++;
return (0);
}
#if MCLBYTES > PAGE_SIZE
if (nowait) {
i_want_my_mcl += ncl;
wakeup(&i_want_my_mcl);
mbstat.m_wait++;
p = 0;
} else {
p = contigmalloc1(MCLBYTES * ncl, M_DEVBUF, M_WAITOK, 0ul,
@ -206,8 +214,10 @@ m_clalloc(ncl, nowait)
* Either the map is now full, or this is nowait and there
* are no pages left.
*/
if (p == NULL)
if (p == NULL) {
mbstat.m_drops++;
return (0);
}
for (i = 0; i < ncl; i++) {
((union mcluster *)p)->mcl_next = mclfree;

35
sys/kern/uipc_sockbuf.c
View File

@ -970,8 +970,43 @@ struct pr_usrreqs pru_oldstyle = {
* Some routines that return EOPNOTSUPP for entry points that are not
* supported by a protocol. Fill in as needed.
*/
int
pru_accept_notsupp(struct socket *so, struct mbuf *nam)
{
return EOPNOTSUPP;
}
int
pru_connect2_notsupp(struct socket *so1, struct socket *so2)
{
return EOPNOTSUPP;
}
int
pru_listen_notsupp(struct socket *so)
{
return EOPNOTSUPP;
}
int
pru_rcvd_notsupp(struct socket *so, int flags)
{
return EOPNOTSUPP;
}
int
pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags)
{
return EOPNOTSUPP;
}
/*
* This isn't really a ``null'' operation, but it's the default one
* and doesn't do anything destructive.
*/
int
pru_sense_null(struct socket *so, struct stat *sb)
{
sb->st_blksize = so->so_snd.sb_hiwat;
return 0;
}

35
sys/kern/uipc_socket2.c
View File

@ -970,8 +970,43 @@ struct pr_usrreqs pru_oldstyle = {
* Some routines that return EOPNOTSUPP for entry points that are not
* supported by a protocol. Fill in as needed.
*/
int
pru_accept_notsupp(struct socket *so, struct mbuf *nam)
{
return EOPNOTSUPP;
}
int
pru_connect2_notsupp(struct socket *so1, struct socket *so2)
{
return EOPNOTSUPP;
}
int
pru_listen_notsupp(struct socket *so)
{
return EOPNOTSUPP;
}
int
pru_rcvd_notsupp(struct socket *so, int flags)
{
return EOPNOTSUPP;
}
int
pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags)
{
return EOPNOTSUPP;
}
/*
* This isn't really a ``null'' operation, but it's the default one
* and doesn't do anything destructive.
*/
int
pru_sense_null(struct socket *so, struct stat *sb)
{
sb->st_blksize = so->so_snd.sb_hiwat;
return 0;
}