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-rw-r--r--plugins/imsolaris/imsolaris.c146
-rw-r--r--plugins/imsolaris/imsolaris.h1
-rw-r--r--plugins/imsolaris/sun_cddl.c143
-rw-r--r--plugins/imsolaris/sun_cddl.h4
4 files changed, 163 insertions, 131 deletions
diff --git a/plugins/imsolaris/imsolaris.c b/plugins/imsolaris/imsolaris.c
index 67aa479d..c8076d93 100644
--- a/plugins/imsolaris/imsolaris.c
+++ b/plugins/imsolaris/imsolaris.c
@@ -66,6 +66,7 @@
#include "rsyslog.h"
#include <stdlib.h>
#include <stdio.h>
+#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <stropts.h>
@@ -96,9 +97,6 @@ DEFobjCurrIf(glbl)
DEFobjCurrIf(prop)
-static int logfd = -1; /* file descriptor to access the system log */
-
-
/* config settings */
static prop_t *pInputName = NULL; /* our inputName currently is always "imuxsock", and this will hold it */
static char *LogName = NULL; /* the log socket name TODO: make configurable! */
@@ -128,8 +126,6 @@ solaris_readLog(int fd)
uchar *pRcv = NULL; /* receive buffer */
char errStr[1024];
- assert(logfd >= 0);
-
iMaxLine = glbl.GetMaxLine();
/* we optimize performance: if iMaxLine is below 4K (which it is in almost all
@@ -152,10 +148,10 @@ solaris_readLog(int fd)
ret = getmsg(fd, &ctl, &data, &flags);
if(ret < 0) {
rs_strerror_r(errno, errStr, sizeof(errStr));
- dbgprintf("imsolaris: getmsg() error on fd %d: %s.\n", fd, errStr);
+ DBGPRINTF("imsolaris: getmsg() error on fd %d: %s.\n", fd, errStr);
}
- dbgprintf("imsolaris: getmsg() returns %d\n", ret);
- dbgprintf("imsolaris: message from log socket: #%d: %s\n", fd, pRcv);
+ DBGPRINTF("imsolaris: getmsg() returns %d\n", ret);
+ DBGPRINTF("imsolaris: message from log socket: #%d: %s\n", fd, pRcv);
if (1) {//iRcvd > 0) {
CHKiRet(msgConstruct(&pMsg));
//MsgSetFlowControlType(pMsg, eFLOWCTL_FULL_DELAY);
@@ -170,7 +166,7 @@ solaris_readLog(int fd)
} else if (iRcvd < 0 && errno != EINTR) {
int en = errno;
rs_strerror_r(en, errStr, sizeof(errStr));
- dbgprintf("imsolaris: stream error: %d = %s.\n", errno, errStr);
+ DBGPRINTF("imsolaris: stream error: %d = %s.\n", errno, errStr);
errmsg.LogError(en, NO_ERRCODE, "imsolaris: stream input error: %s", errStr);
}
@@ -182,6 +178,117 @@ finalize_it:
}
+/* we try to recover a failed file by closing and re-opening
+ * it. We loop until the re-open works, but wait between each
+ * failure. If the open succeeds, we assume all is well. If it is
+ * not, we will run into the retry process with the next
+ * iteration.
+ * rgerhards, 2010-04-19
+ */
+static inline void
+tryRecover(void)
+{
+ int tryNum = 0;
+ int waitsecs;
+ int waitusecs;
+ rsRetVal iRet;
+
+ close(sun_Pfd.fd);
+ sun_Pfd.fd = -1;
+
+ while(1) { /* loop broken inside */
+ iRet = sun_openklog((LogName == NULL) ? PATH_LOG : LogName);
+ if(iRet == RS_RET_OK) {
+ if(tryNum > 0) {
+ errmsg.LogError(0, iRet, "failure on system log socket recovered.");
+ }
+ break;
+ }
+ /* failure, so sleep a bit. We wait try*10 ms, with a max of 15 seconds */
+ if(tryNum == 0) {
+ errmsg.LogError(0, iRet, "failure on system log socket, trying to recover...");
+ waitusecs = tryNum * 10000;
+ waitsecs = waitusecs / 1000000;
+ if(waitsecs != 15) {
+ waitsecs = 15;
+ waitusecs = 0;
+ } else {
+ waitusecs = waitusecs % 1000000;
+ }
+ srSleep(waitsecs, waitusecs);
+ ++tryNum;
+ }
+ }
+}
+
+
+/* a function to replace the sun logerror() function.
+ * It generates an error message from the supplied string. The main
+ * reason for not calling logError directly is that sun_cddl.c does not
+ * know or has acces to rsyslog objects (namely errmsg) -- and we do not
+ * want to do this effort. -- rgerhards, 2010-04-19
+ */
+void
+imsolaris_logerror(int err, char *errStr)
+{
+ errmsg.LogError(err, RS_RET_ERR_DOOR, "%s", errStr);
+}
+
+
+/* once the system is fully initialized, we wait for new messages.
+ * We may think about replacing this with a read-loop, thus saving
+ * us the overhead of the poll.
+ * The timeout variable is the timeout to use for poll. During startup,
+ * it should be set to 0 (non-blocking) and later to -1 (infinit, blocking).
+ * This mimics the (strange) behaviour of the original syslogd.
+ * rgerhards, 2010-04-19
+ */
+static inline rsRetVal
+getMsgs(int timeout)
+{
+ DEFiRet;
+ int nfds;
+ char errStr[1024];
+
+ do {
+ DBGPRINTF("imsolaris: waiting for next message (timeout %d)...\n", timeout);
+ nfds = poll(&sun_Pfd, 1, timeout); /* wait without timeout */
+
+ /* v5-TODO: here we must check if we should terminante! */
+
+ if(nfds == 0) {
+ if(timeout == 0) {
+ DBGPRINTF("imsolaris: no more messages, getMsgs() terminates\n");
+ FINALIZE;
+ } else {
+ continue;
+ }
+ }
+
+ if(nfds < 0) {
+ if(errno != EINTR) {
+ int en = errno;
+ rs_strerror_r(en, errStr, sizeof(errStr));
+ DBGPRINTF("imsolaris: poll error: %d = %s.\n", errno, errStr);
+ errmsg.LogError(en, NO_ERRCODE, "imsolaris: poll error: %s", errStr);
+ }
+ continue;
+ }
+ if(sun_Pfd.revents & POLLIN) {
+ solaris_readLog(sun_Pfd.fd);
+ } else if(sun_Pfd.revents & (POLLNVAL|POLLHUP|POLLERR)) {
+ tryRecover();
+ }
+
+ } while(1);
+
+ /* Note: in v4, this code is never reached (our thread will be cancelled) */
+
+finalize_it:
+ RETiRet;
+}
+
+
/* This function is called to gather input. */
BEGINrunInput
CODESTARTrunInput
@@ -190,19 +297,18 @@ CODESTARTrunInput
* right into the sleep below.
*/
- dbgprintf("imsolaris: prepare_sys_poll()\n");
- prepare_sys_poll();
+ DBGPRINTF("imsolaris: doing startup poll before openeing door()\n");
+ CHKiRet(getMsgs(0));
/* note: sun's syslogd code claims that the door should only
- * be opened when the log socket has been polled. So file header
+ * be opened when the log stream has been polled. So file header
* comment of this file for more details.
*/
sun_open_door();
- dbgprintf("imsolaris: starting regular poll loop\n");
- while(1) {
- sun_sys_poll();
- }
+ DBGPRINTF("imsolaris: starting regular poll loop\n");
+ iRet = getMsgs(-1); /* this is the primary poll loop, infinite timeout */
+finalize_it:
RETiRet;
ENDrunInput
@@ -214,8 +320,7 @@ CODESTARTwillRun
CHKiRet(prop.SetString(pInputName, UCHAR_CONSTANT("imsolaris"), sizeof("imsolaris") - 1));
CHKiRet(prop.ConstructFinalize(pInputName));
- iRet = sun_openklog((LogName == NULL) ? PATH_LOG : LogName, &logfd);
- dbgprintf("imsolaris opened system log socket as fd %d\n", logfd);
+ iRet = sun_openklog((LogName == NULL) ? PATH_LOG : LogName);
if(iRet != RS_RET_OK) {
errmsg.LogError(0, iRet, "error opening system log socket");
}
@@ -245,7 +350,8 @@ CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_IMOD_QUERIES
ENDqueryEtryPt
-static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
+static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp,
+ void __attribute__((unused)) *pVal)
{
return RS_RET_OK;
}
@@ -259,7 +365,7 @@ CODEmodInit_QueryRegCFSLineHdlr
CHKiRet(objUse(glbl, CORE_COMPONENT));
CHKiRet(objUse(prop, CORE_COMPONENT));
- dbgprintf("imsolaris version %s initializing\n", PACKAGE_VERSION);
+ DBGPRINTF("imsolaris version %s initializing\n", PACKAGE_VERSION);
/* register config file handlers */
CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
diff --git a/plugins/imsolaris/imsolaris.h b/plugins/imsolaris/imsolaris.h
index 9637220b..e73380fa 100644
--- a/plugins/imsolaris/imsolaris.h
+++ b/plugins/imsolaris/imsolaris.h
@@ -1 +1,2 @@
rsRetVal solaris_readLog(int fd);
+void imsolaris_logerror(int err, char *errStr);
diff --git a/plugins/imsolaris/sun_cddl.c b/plugins/imsolaris/sun_cddl.c
index 69636df0..6d49c8bc 100644
--- a/plugins/imsolaris/sun_cddl.c
+++ b/plugins/imsolaris/sun_cddl.c
@@ -71,7 +71,14 @@
/* Buffer to allocate for error messages: */
#define ERRMSG_LEN 1024
-static struct pollfd Pfd; /* Pollfd for local the log device */
+/* Max number of door server threads for syslogd. Since door is used
+ * to check the health of syslogd, we don't need large number of
+ * server threads.
+ */
+#define MAX_DOOR_SERVER_THR 3
+
+
+struct pollfd sun_Pfd; /* Pollfd for local log device */
static int DoorFd = -1;
static int DoorCreated = 0;
@@ -82,14 +89,16 @@ static pthread_mutex_t door_server_cnt_lock = PTHREAD_MUTEX_INITIALIZER;
static uint_t door_server_cnt = 0;
static pthread_attr_t door_thr_attr;
-/*
- * the 'server' function that we export via the door. It does
+/* the 'server' function that we export via the door. It does
* nothing but return.
*/
/*ARGSUSED*/
static void
-server(void __attribute__((unused)) *cookie, char __attribute__((unused)) *argp, size_t __attribute__((unused)) arg_size,
- door_desc_t __attribute__((unused)) *dp, __attribute__((unused)) uint_t n)
+server( void __attribute__((unused)) *cookie,
+ char __attribute__((unused)) *argp,
+ size_t __attribute__((unused)) arg_size,
+ door_desc_t __attribute__((unused)) *dp,
+ __attribute__((unused)) uint_t n )
{
(void) door_return(NULL, 0, NULL, 0);
/* NOTREACHED */
@@ -102,8 +111,7 @@ create_door_thr(void __attribute__((unused)) *arg)
(void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
(void) door_return(NULL, 0, NULL, 0);
- /*
- * If there is an error in door_return(), it will return here and
+ /* If there is an error in door_return(), it will return here and
* the thread will exit. Hence we need to decrement door_server_cnt.
*/
(void) pthread_mutex_lock(&door_server_cnt_lock);
@@ -113,13 +121,6 @@ create_door_thr(void __attribute__((unused)) *arg)
}
/*
- * Max number of door server threads for syslogd. Since door is used
- * to check the health of syslogd, we don't need large number of
- * server threads.
- */
-#define MAX_DOOR_SERVER_THR 3
-
-/*
* Manage door server thread pool.
*/
/*ARGSUSED*/
@@ -149,8 +150,7 @@ sun_delete_doorfiles(void)
err = errno;
(void) snprintf(line, sizeof (line),
"unlink() of %s failed - fatal", DoorFileName);
- errno = err;
- DBGPRINTF("%s", line);//logerror(line);
+ imsolaris_logerror(err, line);
DBGPRINTF("delete_doorfiles: error: %s, "
"errno=%d\n", line, err);
exit(1);
@@ -171,7 +171,7 @@ sun_delete_doorfiles(void)
errno = err;
(void) strlcat(line, " - fatal",
sizeof (line));
- //logerror(line);
+ imsolaris_logerror(err, line);
DBGPRINTF("delete_doorfiles: "
"error: %s, errno=%d\n",
line, err);
@@ -233,8 +233,7 @@ sun_open_door(void)
info.di_target, getpid());
DBGPRINTF("open_door: error: "
"%s\n", line);
- errno = 0;
- //logerror(line);
+ imsolaris_logerror(0, line);
exit(1);
}
}
@@ -256,8 +255,7 @@ sun_open_door(void)
DBGPRINTF("open_door: error: %s, "
"errno=%d\n", line,
err);
- errno = err;
- //logerror(line);
+ imsolaris_logerror(err, line);
sun_delete_doorfiles();
exit(1);
}
@@ -284,8 +282,7 @@ sun_open_door(void)
OLD_DOORFILE);
DBGPRINTF("open_door: error: "
"%s\n", line);
- errno = 0;
- //logerror(line);
+ imsolaris_logerror(0, line);
sun_delete_doorfiles();
exit(1);
}
@@ -306,8 +303,7 @@ sun_open_door(void)
"errno=%d\n",
line, err);
(void) strcat(line, " - fatal");
- errno = err;
- //logerror(line);
+ imsolaris_logerror(err, line);
sun_delete_doorfiles();
exit(1);
}
@@ -333,9 +329,8 @@ sun_open_door(void)
DBGPRINTF("open_door: error: %s, "
"errno=%d\n", line,
err);
- errno = err;
(void) strcat(line, " - fatal");
- //logerror(line);
+ imsolaris_logerror(err, line);
sun_delete_doorfiles();
exit(1);
}
@@ -356,8 +351,7 @@ sun_open_door(void)
(void) sprintf(line, "door_create() failed - fatal");
DBGPRINTF("open_door: error: %s, errno=%d\n",
line, err);
- errno = err;
- //logerror(line);
+ imsolaris_logerror(err, line);
sun_delete_doorfiles();
exit(1);
}
@@ -378,8 +372,7 @@ sun_open_door(void)
" %d to %s failed - fatal", DoorFd, DoorFileName);
DBGPRINTF("open_door: error: %s, errno=%d\n",
line, err);
- errno = err;
- //logerror(line);
+ imsolaris_logerror(err, line);
sun_delete_doorfiles();
exit(1);
}
@@ -394,15 +387,16 @@ sun_open_door(void)
* and return a file descriptor.
*/
rsRetVal
-sun_openklog(char *name, int *fd)
+sun_openklog(char *name)
{
DEFiRet;
+ int fd;
struct strioctl str;
char errBuf[1024];
- if((*fd = open(name, O_RDONLY)) < 0) {
+ if((fd = open(name, O_RDONLY)) < 0) {
rs_strerror_r(errno, errBuf, sizeof(errBuf));
- dbgprintf("imsolaris:openklog: cannot open %s: %s\n",
+ DBGPRINTF("imsolaris:openklog: cannot open %s: %s\n",
name, errBuf);
ABORT_FINALIZE(RS_RET_ERR_OPEN_KLOG);
}
@@ -410,87 +404,16 @@ sun_openklog(char *name, int *fd)
str.ic_timout = 0;
str.ic_len = 0;
str.ic_dp = NULL;
- if (ioctl(*fd, I_STR, &str) < 0) {
+ if (ioctl(fd, I_STR, &str) < 0) {
rs_strerror_r(errno, errBuf, sizeof(errBuf));
- dbgprintf("imsolaris:openklog: cannot register to log "
+ DBGPRINTF("imsolaris:openklog: cannot register to log "
"console messages: %s\n", errBuf);
ABORT_FINALIZE(RS_RET_ERR_AQ_CONLOG);
}
- Pfd.fd = *fd;
- Pfd.events = POLLIN;
- dbgprintf("imsolaris/openklog: opened '%s' as fd %d.\n", name, *fd);
+ sun_Pfd.fd = fd;
+ sun_Pfd.events = POLLIN;
+ DBGPRINTF("imsolaris/openklog: opened '%s' as fd %d.\n", name, fd);
finalize_it:
RETiRet;
}
-
-
-/* this thread listens to the local stream log driver for log messages
- * generated by this host, formats them, and queues them to the logger
- * thread.
- */
-/*ARGSUSED*/
-void
-sun_sys_poll()
-{
- int nfds;
-
- dbgprintf("imsolaris:sys_poll: sys_thread started\n");
-
- for (;;) {
- errno = 0;
-
- dbgprintf("imsolaris:sys_poll waiting for next message...\n");
- nfds = poll(&Pfd, 1, INFTIM);
-
- if (nfds == 0)
- continue;
-
- if (nfds < 0) {
- if (errno != EINTR)
- dbgprintf("imsolaris:poll error");
- continue;
- }
- if (Pfd.revents & POLLIN) {
- solaris_readLog(Pfd.fd);
- } else {
- /* TODO: shutdown, the rsyslog way (in v5!) -- check shutdown flag */
- if (Pfd.revents & (POLLNVAL|POLLHUP|POLLERR)) {
- // TODO: trigger retry logic
-/* logerror("kernel log driver poll error");
- (void) close(Pfd.fd);
- Pfd.fd = -1;
- */
- }
- }
-
- }
- /*NOTREACHED*/
-}
-
-
-/* Open the log device, and pull up all pending messages.
- */
-void
-prepare_sys_poll()
-{
- int nfds;
-
- Pfd.events = POLLIN;
-
- for (;;) {
- dbgprintf("imsolaris:prepare_sys_poll waiting for next message...\n");
- nfds = poll(&Pfd, 1, 0);
- if (nfds <= 0) {
- break;
- }
-
- if (Pfd.revents & POLLIN) {
- solaris_readLog(Pfd.fd);
- } else if (Pfd.revents & (POLLNVAL|POLLHUP|POLLERR)) {
- //logerror("kernel log driver poll error");
- break;
- }
- }
-
-}
diff --git a/plugins/imsolaris/sun_cddl.h b/plugins/imsolaris/sun_cddl.h
index 0139b3d8..42e4b799 100644
--- a/plugins/imsolaris/sun_cddl.h
+++ b/plugins/imsolaris/sun_cddl.h
@@ -1,5 +1,7 @@
-rsRetVal sun_openklog(char *name, int *);
+rsRetVal sun_openklog(char *name);
void prepare_sys_poll(void);
void sun_sys_poll(void);
void sun_open_door(void);
void sun_delete_doorfiles(void);
+
+extern struct pollfd sun_Pfd; /* Pollfd for local log device */
generated by cgit (git 2.34.1) at 2024-11-18 20:03:29 +0000