mirror of
http://git.haproxy.org/git/haproxy.git/
synced 2025-01-19 20:20:45 +00:00
MINOR: log: Extract some code to send syslog messages.
This patch extracts the code of __send_log() responsible of sending a syslog message to a syslog destination represented as a logsrv struct to define __do_send_log() function. __send_log() calls __do_send_log() for each syslog destination of a proxy after having prepared some of its parameters.
This commit is contained in:
Frdric Lcaille
Willy Tarreau
parent
333939c2ee
commit
0bad840b4d
455
src/log.c
455
src/log.c
@ -1310,13 +1310,16 @@ void send_log(struct proxy *p, int level, const char *format, ...)
|
||||
}
|
||||
|
||||
/*
|
||||
* This function sends a syslog message.
|
||||
* It doesn't care about errors nor does it report them.
|
||||
* This function sends a syslog message to <logsrv>.
|
||||
* <pid_str> is the string to be used for the PID of the caller, <pid_size> is length.
|
||||
* Same thing for <sd> and <sd_size> which are used for the structured-data part
|
||||
* in RFC5424 formatted syslog messages, and <tag_str> and <tag_size> the syslog tag.
|
||||
* It overrides the last byte of the message vector with an LF character.
|
||||
* The arguments <sd> and <sd_size> are used for the structured-data part
|
||||
* in RFC5424 formatted syslog messages.
|
||||
* Does not return any error,
|
||||
*/
|
||||
void __send_log(struct proxy *p, int level, char *message, size_t size, char *sd, size_t sd_size)
|
||||
static inline void __do_send_log(struct logsrv *logsrv, int nblogger, char *pid_str, size_t pid_size,
|
||||
int level, char *message, size_t size, char *sd, size_t sd_size,
|
||||
char *tag_str, size_t tag_size)
|
||||
{
|
||||
static THREAD_LOCAL struct iovec iovec[NB_MSG_IOVEC_ELEMENTS] = { };
|
||||
static THREAD_LOCAL struct msghdr msghdr = {
|
||||
@ -1326,22 +1329,236 @@ void __send_log(struct proxy *p, int level, char *message, size_t size, char *sd
|
||||
static THREAD_LOCAL int logfdunix = -1; /* syslog to AF_UNIX socket */
|
||||
static THREAD_LOCAL int logfdinet = -1; /* syslog to AF_INET socket */
|
||||
static THREAD_LOCAL char *dataptr = NULL;
|
||||
int fac_level;
|
||||
struct list *logsrvs = NULL;
|
||||
struct logsrv *tmp = NULL;
|
||||
int nblogger;
|
||||
time_t time = date.tv_sec;
|
||||
char *hdr, *hdr_ptr;
|
||||
size_t hdr_size;
|
||||
time_t time = date.tv_sec;
|
||||
struct buffer *tag = &global.log_tag;
|
||||
static THREAD_LOCAL int curr_pid;
|
||||
static THREAD_LOCAL char pidstr[100];
|
||||
static THREAD_LOCAL struct buffer pid;
|
||||
int fac_level;
|
||||
int *plogfd;
|
||||
char *pid_sep1 = "", *pid_sep2 = "";
|
||||
char logheader_short[3];
|
||||
int sent;
|
||||
int maxlen;
|
||||
int hdr_max = 0;
|
||||
int tag_max = 0;
|
||||
int pid_sep1_max = 0;
|
||||
int pid_sep2_max = 0;
|
||||
int sd_max = 0;
|
||||
int max = 0;
|
||||
|
||||
msghdr.msg_iov = iovec;
|
||||
|
||||
dataptr = message;
|
||||
|
||||
if (logsrv->addr.ss_family == AF_UNSPEC) {
|
||||
/* the socket's address is a file descriptor */
|
||||
plogfd = (int *)&((struct sockaddr_in *)&logsrv->addr)->sin_addr.s_addr;
|
||||
if (unlikely(!((struct sockaddr_in *)&logsrv->addr)->sin_port)) {
|
||||
/* FD not yet initialized to non-blocking mode.
|
||||
* DON'T DO IT ON A TERMINAL!
|
||||
*/
|
||||
if (!isatty(*plogfd))
|
||||
fcntl(*plogfd, F_SETFL, O_NONBLOCK);
|
||||
((struct sockaddr_in *)&logsrv->addr)->sin_port = 1;
|
||||
}
|
||||
}
|
||||
else if (logsrv->addr.ss_family == AF_UNIX)
|
||||
plogfd = &logfdunix;
|
||||
else
|
||||
plogfd = &logfdinet;
|
||||
|
||||
if (unlikely(*plogfd < 0)) {
|
||||
/* socket not successfully initialized yet */
|
||||
if ((*plogfd = socket(logsrv->addr.ss_family, SOCK_DGRAM,
|
||||
(logsrv->addr.ss_family == AF_UNIX) ? 0 : IPPROTO_UDP)) < 0) {
|
||||
static char once;
|
||||
|
||||
if (!once) {
|
||||
once = 1; /* note: no need for atomic ops here */
|
||||
ha_alert("socket() failed in logger #%d: %s (errno=%d)\n",
|
||||
nblogger, strerror(errno), errno);
|
||||
}
|
||||
return;
|
||||
} else {
|
||||
/* we don't want to receive anything on this socket */
|
||||
setsockopt(*plogfd, SOL_SOCKET, SO_RCVBUF, &zero, sizeof(zero));
|
||||
/* does nothing under Linux, maybe needed for others */
|
||||
shutdown(*plogfd, SHUT_RD);
|
||||
fcntl(*plogfd, F_SETFD, fcntl(*plogfd, F_GETFD, FD_CLOEXEC) | FD_CLOEXEC);
|
||||
}
|
||||
}
|
||||
|
||||
switch (logsrv->format) {
|
||||
case LOG_FORMAT_RFC3164:
|
||||
hdr = logheader;
|
||||
hdr_ptr = update_log_hdr(time);
|
||||
break;
|
||||
|
||||
case LOG_FORMAT_RFC5424:
|
||||
hdr = logheader_rfc5424;
|
||||
hdr_ptr = update_log_hdr_rfc5424(time);
|
||||
sd_max = sd_size; /* the SD part allowed only in RFC5424 */
|
||||
break;
|
||||
|
||||
case LOG_FORMAT_SHORT:
|
||||
/* all fields are known, skip the header generation */
|
||||
hdr = logheader_short;
|
||||
hdr[0] = '<';
|
||||
hdr[1] = '0' + MAX(level, logsrv->minlvl);
|
||||
hdr[2] = '>';
|
||||
hdr_ptr = hdr;
|
||||
hdr_max = 3;
|
||||
maxlen = logsrv->maxlen - hdr_max;
|
||||
max = MIN(size, maxlen) - 1;
|
||||
goto send;
|
||||
|
||||
case LOG_FORMAT_RAW:
|
||||
/* all fields are known, skip the header generation */
|
||||
hdr_ptr = hdr = "";
|
||||
hdr_max = 0;
|
||||
maxlen = logsrv->maxlen;
|
||||
max = MIN(size, maxlen) - 1;
|
||||
goto send;
|
||||
|
||||
default:
|
||||
return; /* must never happen */
|
||||
}
|
||||
|
||||
hdr_size = hdr_ptr - hdr;
|
||||
|
||||
/* For each target, we may have a different facility.
|
||||
* We can also have a different log level for each message.
|
||||
* This induces variations in the message header length.
|
||||
* Since we don't want to recompute it each time, nor copy it every
|
||||
* time, we only change the facility in the pre-computed header,
|
||||
* and we change the pointer to the header accordingly.
|
||||
*/
|
||||
fac_level = (logsrv->facility << 3) + MAX(level, logsrv->minlvl);
|
||||
hdr_ptr = hdr + 3; /* last digit of the log level */
|
||||
do {
|
||||
*hdr_ptr = '0' + fac_level % 10;
|
||||
fac_level /= 10;
|
||||
hdr_ptr--;
|
||||
} while (fac_level && hdr_ptr > hdr);
|
||||
*hdr_ptr = '<';
|
||||
|
||||
hdr_max = hdr_size - (hdr_ptr - hdr);
|
||||
|
||||
/* time-based header */
|
||||
if (unlikely(hdr_size >= logsrv->maxlen)) {
|
||||
hdr_max = MIN(hdr_max, logsrv->maxlen) - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
maxlen = logsrv->maxlen - hdr_max;
|
||||
|
||||
/* tag */
|
||||
tag_max = tag->data;
|
||||
if (unlikely(tag_max >= maxlen)) {
|
||||
tag_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
maxlen -= tag_max;
|
||||
|
||||
/* first pid separator */
|
||||
pid_sep1_max = log_formats[logsrv->format].pid.sep1.data;
|
||||
if (unlikely(pid_sep1_max >= maxlen)) {
|
||||
pid_sep1_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
pid_sep1 = log_formats[logsrv->format].pid.sep1.area;
|
||||
maxlen -= pid_sep1_max;
|
||||
|
||||
/* pid */
|
||||
if (unlikely(pid_size >= maxlen)) {
|
||||
pid_size = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
maxlen -= pid_size;
|
||||
|
||||
/* second pid separator */
|
||||
pid_sep2_max = log_formats[logsrv->format].pid.sep2.data;
|
||||
if (unlikely(pid_sep2_max >= maxlen)) {
|
||||
pid_sep2_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
pid_sep2 = log_formats[logsrv->format].pid.sep2.area;
|
||||
maxlen -= pid_sep2_max;
|
||||
|
||||
/* structured-data */
|
||||
if (sd_max >= maxlen) {
|
||||
sd_max = maxlen - 1;
|
||||
goto send;
|
||||
}
|
||||
|
||||
max = MIN(size, maxlen - sd_max) - 1;
|
||||
send:
|
||||
iovec[0].iov_base = hdr_ptr;
|
||||
iovec[0].iov_len = hdr_max;
|
||||
iovec[1].iov_base = tag_str;
|
||||
iovec[1].iov_len = tag_size;
|
||||
iovec[2].iov_base = pid_sep1;
|
||||
iovec[2].iov_len = pid_sep1_max;
|
||||
iovec[3].iov_base = pid_str;
|
||||
iovec[3].iov_len = pid_size;
|
||||
iovec[4].iov_base = pid_sep2;
|
||||
iovec[4].iov_len = pid_sep2_max;
|
||||
iovec[5].iov_base = sd;
|
||||
iovec[5].iov_len = sd_max;
|
||||
iovec[6].iov_base = dataptr;
|
||||
iovec[6].iov_len = max;
|
||||
iovec[7].iov_base = "\n"; /* insert a \n at the end of the message */
|
||||
iovec[7].iov_len = 1;
|
||||
|
||||
if (logsrv->addr.ss_family == AF_UNSPEC) {
|
||||
/* the target is a direct file descriptor */
|
||||
sent = writev(*plogfd, iovec, 8);
|
||||
}
|
||||
else {
|
||||
msghdr.msg_name = (struct sockaddr *)&logsrv->addr;
|
||||
msghdr.msg_namelen = get_addr_len(&logsrv->addr);
|
||||
|
||||
sent = sendmsg(*plogfd, &msghdr, MSG_DONTWAIT | MSG_NOSIGNAL);
|
||||
}
|
||||
|
||||
if (sent < 0) {
|
||||
static char once;
|
||||
|
||||
if (errno == EAGAIN)
|
||||
_HA_ATOMIC_ADD(&dropped_logs, 1);
|
||||
else if (!once) {
|
||||
once = 1; /* note: no need for atomic ops here */
|
||||
ha_alert("sendmsg()/writev() failed in logger #%d: %s (errno=%d)\n",
|
||||
nblogger, strerror(errno), errno);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* This function sends a syslog message.
|
||||
* It doesn't care about errors nor does it report them.
|
||||
* The arguments <sd> and <sd_size> are used for the structured-data part
|
||||
* in RFC5424 formatted syslog messages.
|
||||
*/
|
||||
void __send_log(struct proxy *p, int level, char *message, size_t size, char *sd, size_t sd_size)
|
||||
{
|
||||
struct list *logsrvs = NULL;
|
||||
struct logsrv *logsrv;
|
||||
int nblogger;
|
||||
static THREAD_LOCAL int curr_pid;
|
||||
static THREAD_LOCAL char pidstr[100];
|
||||
static THREAD_LOCAL struct buffer pid;
|
||||
struct buffer *tag = &global.log_tag;
|
||||
|
||||
if (p == NULL) {
|
||||
if (!LIST_ISEMPTY(&global.logsrvs)) {
|
||||
logsrvs = &global.logsrvs;
|
||||
@ -1366,219 +1583,13 @@ void __send_log(struct proxy *p, int level, char *message, size_t size, char *sd
|
||||
|
||||
/* Send log messages to syslog server. */
|
||||
nblogger = 0;
|
||||
list_for_each_entry(tmp, logsrvs, list) {
|
||||
const struct logsrv *logsrv = tmp;
|
||||
int *plogfd;
|
||||
char *pid_sep1 = "", *pid_sep2 = "";
|
||||
char logheader_short[3];
|
||||
int sent;
|
||||
int maxlen;
|
||||
int hdr_max = 0;
|
||||
int tag_max = 0;
|
||||
int pid_sep1_max = 0;
|
||||
int pid_max = 0;
|
||||
int pid_sep2_max = 0;
|
||||
int sd_max = 0;
|
||||
int max = 0;
|
||||
|
||||
nblogger++;
|
||||
|
||||
list_for_each_entry(logsrv, logsrvs, list) {
|
||||
/* we can filter the level of the messages that are sent to each logger */
|
||||
if (level > logsrv->level)
|
||||
continue;
|
||||
|
||||
if (logsrv->addr.ss_family == AF_UNSPEC) {
|
||||
/* the socket's address is a file descriptor */
|
||||
plogfd = (int *)&((struct sockaddr_in *)&logsrv->addr)->sin_addr.s_addr;
|
||||
if (unlikely(!((struct sockaddr_in *)&logsrv->addr)->sin_port)) {
|
||||
/* FD not yet initialized to non-blocking mode.
|
||||
* DON'T DO IT ON A TERMINAL!
|
||||
*/
|
||||
if (!isatty(*plogfd))
|
||||
fcntl(*plogfd, F_SETFL, O_NONBLOCK);
|
||||
((struct sockaddr_in *)&logsrv->addr)->sin_port = 1;
|
||||
}
|
||||
}
|
||||
else if (logsrv->addr.ss_family == AF_UNIX)
|
||||
plogfd = &logfdunix;
|
||||
else
|
||||
plogfd = &logfdinet;
|
||||
|
||||
if (unlikely(*plogfd < 0)) {
|
||||
/* socket not successfully initialized yet */
|
||||
if ((*plogfd = socket(logsrv->addr.ss_family, SOCK_DGRAM,
|
||||
(logsrv->addr.ss_family == AF_UNIX) ? 0 : IPPROTO_UDP)) < 0) {
|
||||
static char once;
|
||||
|
||||
if (!once) {
|
||||
once = 1; /* note: no need for atomic ops here */
|
||||
ha_alert("socket() failed in logger #%d: %s (errno=%d)\n",
|
||||
nblogger, strerror(errno), errno);
|
||||
}
|
||||
continue;
|
||||
} else {
|
||||
/* we don't want to receive anything on this socket */
|
||||
setsockopt(*plogfd, SOL_SOCKET, SO_RCVBUF, &zero, sizeof(zero));
|
||||
/* does nothing under Linux, maybe needed for others */
|
||||
shutdown(*plogfd, SHUT_RD);
|
||||
fcntl(*plogfd, F_SETFD, fcntl(*plogfd, F_GETFD, FD_CLOEXEC) | FD_CLOEXEC);
|
||||
}
|
||||
}
|
||||
|
||||
switch (logsrv->format) {
|
||||
case LOG_FORMAT_RFC3164:
|
||||
hdr = logheader;
|
||||
hdr_ptr = update_log_hdr(time);
|
||||
break;
|
||||
|
||||
case LOG_FORMAT_RFC5424:
|
||||
hdr = logheader_rfc5424;
|
||||
hdr_ptr = update_log_hdr_rfc5424(time);
|
||||
sd_max = sd_size; /* the SD part allowed only in RFC5424 */
|
||||
break;
|
||||
|
||||
case LOG_FORMAT_SHORT:
|
||||
/* all fields are known, skip the header generation */
|
||||
hdr = logheader_short;
|
||||
hdr[0] = '<';
|
||||
hdr[1] = '0' + MAX(level, logsrv->minlvl);
|
||||
hdr[2] = '>';
|
||||
hdr_ptr = hdr;
|
||||
hdr_max = 3;
|
||||
maxlen = logsrv->maxlen - hdr_max;
|
||||
max = MIN(size, maxlen) - 1;
|
||||
goto send;
|
||||
|
||||
case LOG_FORMAT_RAW:
|
||||
/* all fields are known, skip the header generation */
|
||||
hdr_ptr = hdr = "";
|
||||
hdr_max = 0;
|
||||
maxlen = logsrv->maxlen;
|
||||
max = MIN(size, maxlen) - 1;
|
||||
goto send;
|
||||
|
||||
default:
|
||||
continue; /* must never happen */
|
||||
}
|
||||
|
||||
hdr_size = hdr_ptr - hdr;
|
||||
|
||||
/* For each target, we may have a different facility.
|
||||
* We can also have a different log level for each message.
|
||||
* This induces variations in the message header length.
|
||||
* Since we don't want to recompute it each time, nor copy it every
|
||||
* time, we only change the facility in the pre-computed header,
|
||||
* and we change the pointer to the header accordingly.
|
||||
*/
|
||||
fac_level = (logsrv->facility << 3) + MAX(level, logsrv->minlvl);
|
||||
hdr_ptr = hdr + 3; /* last digit of the log level */
|
||||
do {
|
||||
*hdr_ptr = '0' + fac_level % 10;
|
||||
fac_level /= 10;
|
||||
hdr_ptr--;
|
||||
} while (fac_level && hdr_ptr > hdr);
|
||||
*hdr_ptr = '<';
|
||||
|
||||
hdr_max = hdr_size - (hdr_ptr - hdr);
|
||||
|
||||
/* time-based header */
|
||||
if (unlikely(hdr_size >= logsrv->maxlen)) {
|
||||
hdr_max = MIN(hdr_max, logsrv->maxlen) - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
maxlen = logsrv->maxlen - hdr_max;
|
||||
|
||||
/* tag */
|
||||
tag_max = tag->data;
|
||||
if (unlikely(tag_max >= maxlen)) {
|
||||
tag_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
maxlen -= tag_max;
|
||||
|
||||
/* first pid separator */
|
||||
pid_sep1_max = log_formats[logsrv->format].pid.sep1.data;
|
||||
if (unlikely(pid_sep1_max >= maxlen)) {
|
||||
pid_sep1_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
pid_sep1 = log_formats[logsrv->format].pid.sep1.area;
|
||||
maxlen -= pid_sep1_max;
|
||||
|
||||
/* pid */
|
||||
pid_max = pid.data;
|
||||
if (unlikely(pid_max >= maxlen)) {
|
||||
pid_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
maxlen -= pid_max;
|
||||
|
||||
/* second pid separator */
|
||||
pid_sep2_max = log_formats[logsrv->format].pid.sep2.data;
|
||||
if (unlikely(pid_sep2_max >= maxlen)) {
|
||||
pid_sep2_max = maxlen - 1;
|
||||
sd_max = 0;
|
||||
goto send;
|
||||
}
|
||||
|
||||
pid_sep2 = log_formats[logsrv->format].pid.sep2.area;
|
||||
maxlen -= pid_sep2_max;
|
||||
|
||||
/* structured-data */
|
||||
if (sd_max >= maxlen) {
|
||||
sd_max = maxlen - 1;
|
||||
goto send;
|
||||
}
|
||||
|
||||
max = MIN(size, maxlen - sd_max) - 1;
|
||||
send:
|
||||
iovec[0].iov_base = hdr_ptr;
|
||||
iovec[0].iov_len = hdr_max;
|
||||
iovec[1].iov_base = tag->area;
|
||||
iovec[1].iov_len = tag_max;
|
||||
iovec[2].iov_base = pid_sep1;
|
||||
iovec[2].iov_len = pid_sep1_max;
|
||||
iovec[3].iov_base = pid.area;
|
||||
iovec[3].iov_len = pid_max;
|
||||
iovec[4].iov_base = pid_sep2;
|
||||
iovec[4].iov_len = pid_sep2_max;
|
||||
iovec[5].iov_base = sd;
|
||||
iovec[5].iov_len = sd_max;
|
||||
iovec[6].iov_base = dataptr;
|
||||
iovec[6].iov_len = max;
|
||||
iovec[7].iov_base = "\n"; /* insert a \n at the end of the message */
|
||||
iovec[7].iov_len = 1;
|
||||
|
||||
if (logsrv->addr.ss_family == AF_UNSPEC) {
|
||||
/* the target is a direct file descriptor */
|
||||
sent = writev(*plogfd, iovec, 8);
|
||||
}
|
||||
else {
|
||||
msghdr.msg_name = (struct sockaddr *)&logsrv->addr;
|
||||
msghdr.msg_namelen = get_addr_len(&logsrv->addr);
|
||||
|
||||
sent = sendmsg(*plogfd, &msghdr, MSG_DONTWAIT | MSG_NOSIGNAL);
|
||||
}
|
||||
|
||||
if (sent < 0) {
|
||||
static char once;
|
||||
|
||||
if (errno == EAGAIN)
|
||||
_HA_ATOMIC_ADD(&dropped_logs, 1);
|
||||
else if (!once) {
|
||||
once = 1; /* note: no need for atomic ops here */
|
||||
ha_alert("sendmsg()/writev() failed in logger #%d: %s (errno=%d)\n",
|
||||
nblogger, strerror(errno), errno);
|
||||
}
|
||||
}
|
||||
__do_send_log(logsrv, ++nblogger, pid.area, pid.data, level,
|
||||
message, size, sd, sd_size, tag->area, tag->data);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user