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1bdf6e884a
sink_find_early() is a convenient function that can be used instead of sink_find() during parsing time in order to try to find a matching sink even if the sink is not defined yet. Indeed, if the sink is not defined, sink_find_early() will try to create it and mark it as forward-declared. It will also save informations from the caller to better identify it in case of errors. If the sink happens to be found in the config, it will transition from forward-declared type to its final type. Else, it means that the sink was not found in the config, in this case, during postresolve, we raise an error to indicate that the sink was not found in the configuration. It should help solve postresolving issue with rings, because for now only log targets implement proper ring postresolving.. but rings may be used at different places in the code, such as debug() converter or in "traces" section.
89 lines
2.8 KiB
C
89 lines
2.8 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_find_early(const char *name, const char *from, const char *file, int line);
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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, struct log_header hdr, size_t maxlen,
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const struct ist msg[], size_t nmsg);
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int sink_announce_dropped(struct sink *sink, struct log_header hdr);
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/* tries to send <nmsg> message parts from message array <msg> to sink <sink>.
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* Formatting according to the sink's preference is done here, unless sink->fmt
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* is unspecified, in which case the caller formatting will be used instead.
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*
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* It will stop writing at <maxlen> instead of sink->maxlen if <maxlen> is
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* positive and inferior to sink->maxlen.
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*
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* 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, struct log_header hdr,
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size_t maxlen, const struct ist msg[], size_t nmsg)
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{
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ssize_t sent = 0;
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if (unlikely(HA_ATOMIC_LOAD(&sink->ctx.dropped) > 0)) {
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sent = sink_announce_dropped(sink, hdr);
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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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sent = __sink_write(sink, hdr, maxlen, msg, nmsg);
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fail:
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if (unlikely(sent <= 0))
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HA_ATOMIC_ADD(&sink->ctx.dropped, 2);
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return sent;
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}
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struct sink *sink_new_from_srv(struct server *srv, const char *from);
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int sink_resolve_logger_buffer(struct logger *logger, 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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