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r1901, r1902, r2032 merge:

Browse Source 
bugfixes in channel:

*) avoid endless loop if epoll is used
*) use CMSG_LEN(), this fixes an alert
   "sendmsg() failed (9: Bad file descriptor)" on some 64-bit platforms
*) read channel until EAGAIN
This commit is contained in:
Igor Sysoev 2008-07-07 11:58:55 +00:00
parent 22a5d84970
commit 4012d9909c
4 changed files with 74 additions and 55 deletions
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4
src/os/unix/ngx_channel.c
View File

@ -33,7 +33,7 @@ ngx_write_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size,
msg.msg_control = (caddr_t) &cmsg;
msg.msg_controllen = sizeof(cmsg);
cmsg.cm.cmsg_len = sizeof(cmsg);
cmsg.cm.cmsg_len = CMSG_LEN(sizeof(int));
cmsg.cm.cmsg_level = SOL_SOCKET;
cmsg.cm.cmsg_type = SCM_RIGHTS;
*(int *) CMSG_DATA(&cmsg.cm) = ch->fd;
@ -138,7 +138,7 @@ ngx_read_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, ngx_log_t *log)
if (ch->command == NGX_CMD_OPEN_CHANNEL) {
if (cmsg.cm.cmsg_len < (socklen_t) sizeof(cmsg)) {
if (cmsg.cm.cmsg_len < (socklen_t) CMSG_LEN(sizeof(int))) {
ngx_log_error(NGX_LOG_ALERT, log, 0,
"recvmsg() returned too small ancillary data");
return NGX_ERROR;

7
src/os/unix/ngx_freebsd_config.h
View File

@ -48,11 +48,16 @@
#if __FreeBSD_version < 400017
/* FreeBSD 3.x has no CMSG_SPACE() at all and has the broken CMSG_DATA() */
/*
* FreeBSD 3.x has no CMSG_SPACE() and CMSG_LEN() and has the broken CMSG_DATA()
*/
#undef CMSG_SPACE
#define CMSG_SPACE(l) (ALIGN(sizeof(struct cmsghdr)) + ALIGN(l))
#undef CMSG_LEN
#define CMSG_LEN(l) (ALIGN(sizeof(struct cmsghdr)) + (l))
#undef CMSG_DATA
#define CMSG_DATA(cmsg) ((u_char *)(cmsg) + ALIGN(sizeof(struct cmsghdr)))

7
src/os/unix/ngx_posix_config.h
View File

@ -110,11 +110,16 @@
#include <sys/param.h> /* ALIGN() */
/* FreeBSD 3.x has no CMSG_SPACE() at all and has the broken CMSG_DATA() */
/*
* FreeBSD 3.x has no CMSG_SPACE() and CMSG_LEN() and has the broken CMSG_DATA()
*/
#undef CMSG_SPACE
#define CMSG_SPACE(l) (ALIGN(sizeof(struct cmsghdr)) + ALIGN(l))
#undef CMSG_LEN
#define CMSG_LEN(l) (ALIGN(sizeof(struct cmsghdr)) + (l))
#undef CMSG_DATA
#define CMSG_DATA(cmsg) ((u_char *)(cmsg) + ALIGN(sizeof(struct cmsghdr)))

11
src/os/unix/ngx_process_cycle.c
View File

@ -1055,11 +1055,18 @@ ngx_channel_handler(ngx_event_t *ev)
ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
for ( ;; ) {
n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
if (n == NGX_ERROR) {
if (ngx_event_flags & NGX_USE_EPOLL_EVENT) {
ngx_del_conn(c, 0);
}
ngx_close_connection(c);
return;
}
@ -1094,7 +1101,8 @@ ngx_channel_handler(ngx_event_t *ev)
case NGX_CMD_OPEN_CHANNEL:
ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
"get channel s:%i pid:%P fd:%d", ch.slot, ch.pid, ch.fd);
"get channel s:%i pid:%P fd:%d",
ch.slot, ch.pid, ch.fd);
ngx_processes[ch.slot].pid = ch.pid;
ngx_processes[ch.slot].channel[0] = ch.fd;
@ -1115,6 +1123,7 @@ ngx_channel_handler(ngx_event_t *ev)
ngx_processes[ch.slot].channel[0] = -1;
break;
}
}
}