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Add a sysctl, regression.sonewconn_earlytest, which when options

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REGRESSION is enabled, allows user space to dictate that sonewconn()
should skip it's "skip the hard work" check to see if the listen
queue is full, and instead proceed with allocation of a socket and
trimming of the overflowed queue.  This makes it easier to test the
queue overflow logic.

MFC after:	1 month
This commit is contained in:
Robert Watson 2006-03-26 22:44:37 +00:00
parent d9949cb211
commit 63b01ffd34
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=157158
2 changed files with 20 additions and 0 deletions
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10
sys/kern/uipc_sockbuf.c
View File

@ -70,6 +70,12 @@ static u_long sb_max_adj =
static u_long sb_efficiency = 8; /* parameter for sbreserve() */
#ifdef REGRESSION
static int regression_sonewconn_earlytest = 1;
SYSCTL_INT(_regression, OID_AUTO, sonewconn_earlytest, CTLFLAG_RW,
&regression_sonewconn_earlytest, 0, "Perform early sonewconn limit test");
#endif
/*
* Procedures to manipulate state flags of socket
* and do appropriate wakeups. Normal sequence from the
@ -215,7 +221,11 @@ sonewconn(head, connstatus)
ACCEPT_LOCK();
over = (head->so_qlen > 3 * head->so_qlimit / 2);
ACCEPT_UNLOCK();
#ifdef REGRESSION
if (regression_sonewconn_earlytest && over)
#else
if (over)
#endif
return (NULL);
so = soalloc(M_NOWAIT);
if (so == NULL)

10
sys/kern/uipc_socket2.c
View File

@ -70,6 +70,12 @@ static u_long sb_max_adj =
static u_long sb_efficiency = 8; /* parameter for sbreserve() */
#ifdef REGRESSION
static int regression_sonewconn_earlytest = 1;
SYSCTL_INT(_regression, OID_AUTO, sonewconn_earlytest, CTLFLAG_RW,
&regression_sonewconn_earlytest, 0, "Perform early sonewconn limit test");
#endif
/*
* Procedures to manipulate state flags of socket
* and do appropriate wakeups. Normal sequence from the
@ -215,7 +221,11 @@ sonewconn(head, connstatus)
ACCEPT_LOCK();
over = (head->so_qlen > 3 * head->so_qlimit / 2);
ACCEPT_UNLOCK();
#ifdef REGRESSION
if (regression_sonewconn_earlytest && over)
#else
if (over)
#endif
return (NULL);
so = soalloc(M_NOWAIT);
if (so == NULL)