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d9b81e5b49
We previously had postparsing logic but only for logsrv sinks, but now we need to make this operation on logsrv directly instead of sinks to prepare for additional postparsing logic that is not sink-specific. To do this, we migrated post_sink_resolve() and sink_postresolve_logsrvs() to their postresolve_logsrvs() and postresolve_logsrv_list() equivalents. Then, we split postresolve_logsrv_list() so that the sink-only logic stays in sink.c (sink_resolve_logsrv_buffer() function), and the "generic" target part stays in log.c as resolve_logsrv(). Error messages formatting was preserved as far as possible but some slight variations are to be expected. As for the functional aspect, no change should be expected.
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/*
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* include/haproxy/sink.h
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* This file provides declarations for event sinks management
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*
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* Copyright (C) 2000-2019 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_SINK_H
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#define _HAPROXY_SINK_H
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#include <sys/types.h>
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#include <haproxy/sink-t.h>
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#include <haproxy/thread.h>
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extern struct list sink_list;
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extern struct proxy *sink_proxies_list;
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struct sink *sink_find(const char *name);
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struct sink *sink_new_fd(const char *name, const char *desc, enum log_fmt, int fd);
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ssize_t __sink_write(struct sink *sink, size_t maxlen,
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const struct ist msg[], size_t nmsg,
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int level, int facility, struct ist * metadata);
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int sink_announce_dropped(struct sink *sink, int facility);
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/* tries to send <nmsg> message parts (up to 8, ignored above) from message
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* array <msg> to sink <sink>. Formatting according to the sink's preference is
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* done here. Lost messages are accounted for in the sink's counter. If there
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* were lost messages, an attempt is first made to indicate it.
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* The function returns the number of Bytes effectively sent or announced.
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* or <= 0 in other cases.
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*/
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static inline ssize_t sink_write(struct sink *sink, size_t maxlen,
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const struct ist msg[], size_t nmsg,
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int level, int facility, struct ist *metadata)
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{
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ssize_t sent;
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if (unlikely(sink->ctx.dropped > 0)) {
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/* We need to take an exclusive lock so that other producers
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* don't do the same thing at the same time and above all we
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* want to be sure others have finished sending their messages
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* so that the dropped event arrives exactly at the right
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* position.
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*/
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HA_RWLOCK_WRLOCK(LOGSRV_LOCK, &sink->ctx.lock);
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sent = sink_announce_dropped(sink, facility);
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HA_RWLOCK_WRUNLOCK(LOGSRV_LOCK, &sink->ctx.lock);
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if (!sent) {
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/* we failed, we don't try to send our log as if it
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* would pass by chance, we'd get disordered events.
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*/
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goto fail;
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}
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}
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HA_RWLOCK_RDLOCK(LOGSRV_LOCK, &sink->ctx.lock);
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sent = __sink_write(sink, maxlen, msg, nmsg, level, facility, metadata);
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HA_RWLOCK_RDUNLOCK(LOGSRV_LOCK, &sink->ctx.lock);
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fail:
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if (unlikely(sent <= 0))
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HA_ATOMIC_INC(&sink->ctx.dropped);
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return sent;
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}
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int sink_resolve_logsrv_buffer(struct logsrv *logsrv, char **msg);
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#endif /* _HAPROXY_SINK_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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