chiark / gitweb /
journal-remote: process events without delay
[elogind.git] / src / journal-remote / journal-remote.c
index 1cc86aeaf3bf17a87e7da57357d1a70acf4d3ac2..1a2c1368a3f18b8308c8d6cbb8cfba09f9f877c8 100644 (file)
@@ -26,8 +26,6 @@
 #include <string.h>
 #include <sys/prctl.h>
 #include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
 #include <unistd.h>
 #include <getopt.h>
 
 #include "journal-file.h"
 #include "journald-native.h"
 #include "socket-util.h"
-#include "mkdir.h"
 #include "build.h"
 #include "macro.h"
 #include "strv.h"
 #include "fileio.h"
 #include "conf-parser.h"
-#include "siphash24.h"
 
 #ifdef HAVE_GNUTLS
 #include <gnutls/gnutls.h>
@@ -84,17 +80,15 @@ static int spawn_child(const char* child, char** argv) {
         pid_t parent_pid, child_pid;
         int r;
 
-        if (pipe(fd) < 0) {
-                log_error("Failed to create pager pipe: %m");
-                return -errno;
-        }
+        if (pipe(fd) < 0)
+                return log_error_errno(errno, "Failed to create pager pipe: %m");
 
         parent_pid = getpid();
 
         child_pid = fork();
         if (child_pid < 0) {
                 r = -errno;
-                log_error("Failed to fork: %m");
+                log_error_errno(errno, "Failed to fork: %m");
                 safe_close_pair(fd);
                 return r;
         }
@@ -103,7 +97,7 @@ static int spawn_child(const char* child, char** argv) {
         if (child_pid == 0) {
                 r = dup2(fd[1], STDOUT_FILENO);
                 if (r < 0) {
-                        log_error("Failed to dup pipe to stdout: %m");
+                        log_error_errno(errno, "Failed to dup pipe to stdout: %m");
                         _exit(EXIT_FAILURE);
                 }
 
@@ -119,13 +113,13 @@ static int spawn_child(const char* child, char** argv) {
                         _exit(EXIT_SUCCESS);
 
                 execvp(child, argv);
-                log_error("Failed to exec child %s: %m", child);
+                log_error_errno(errno, "Failed to exec child %s: %m", child);
                 _exit(EXIT_FAILURE);
         }
 
         r = close(fd[1]);
         if (r < 0)
-                log_warning("Failed to close write end of pipe: %m");
+                log_warning_errno(errno, "Failed to close write end of pipe: %m");
 
         return fd[0];
 }
@@ -140,7 +134,7 @@ static int spawn_curl(const char* url) {
 
         r = spawn_child("curl", argv);
         if (r < 0)
-                log_error("Failed to spawn curl: %m");
+                log_error_errno(errno, "Failed to spawn curl: %m");
         return r;
 }
 
@@ -149,21 +143,17 @@ static int spawn_getter(const char *getter, const char *url) {
         _cleanup_strv_free_ char **words = NULL;
 
         assert(getter);
-        r = strv_split_quoted(&words, getter);
-        if (r < 0) {
-                log_error("Failed to split getter option: %s", strerror(-r));
-                return r;
-        }
+        r = strv_split_quoted(&words, getter, false);
+        if (r < 0)
+                return log_error_errno(r, "Failed to split getter option: %m");
 
         r = strv_extend(&words, url);
-        if (r < 0) {
-                log_error("Failed to create command line: %s", strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to create command line: %m");
 
         r = spawn_child(words[0], words);
         if (r < 0)
-                log_error("Failed to spawn getter %s: %m", getter);
+                log_error_errno(errno, "Failed to spawn getter %s: %m", getter);
 
         return r;
 }
@@ -210,10 +200,10 @@ static int open_output(Writer *w, const char* host) {
                                        w->mmap,
                                        NULL, &w->journal);
         if (r < 0)
-                log_error("Failed to open output journal %s: %s",
-                          output, strerror(-r));
+                log_error_errno(r, "Failed to open output journal %s: %m",
+                                output);
         else
-                log_info("Opened output file %s", w->journal->path);
+                log_debug("Opened output file %s", w->journal->path);
         return r;
 }
 
@@ -222,20 +212,14 @@ static int open_output(Writer *w, const char* host) {
  **********************************************************************/
 
 static int init_writer_hashmap(RemoteServer *s) {
-        static const struct {
-                hash_func_t hash_func;
-                compare_func_t compare_func;
-        } functions[] = {
-                [JOURNAL_WRITE_SPLIT_NONE] = {trivial_hash_func,
-                                              trivial_compare_func},
-                [JOURNAL_WRITE_SPLIT_HOST] = {string_hash_func,
-                                              string_compare_func},
+        static const struct hash_ops *hash_ops[] = {
+                [JOURNAL_WRITE_SPLIT_NONE] = NULL,
+                [JOURNAL_WRITE_SPLIT_HOST] = &string_hash_ops,
         };
 
-        assert(arg_split_mode >= 0 && arg_split_mode < (int) ELEMENTSOF(functions));
+        assert(arg_split_mode >= 0 && arg_split_mode < (int) ELEMENTSOF(hash_ops));
 
-        s->writers = hashmap_new(functions[arg_split_mode].hash_func,
-                                 functions[arg_split_mode].compare_func);
+        s->writers = hashmap_new(hash_ops[arg_split_mode]);
         if (!s->writers)
                 return log_oom();
 
@@ -301,6 +285,10 @@ static int dispatch_raw_source_event(sd_event_source *event,
                                      int fd,
                                      uint32_t revents,
                                      void *userdata);
+static int dispatch_raw_source_until_block(sd_event_source *event,
+                                           void *userdata);
+static int dispatch_blocking_source_event(sd_event_source *event,
+                                          void *userdata);
 static int dispatch_raw_connection_event(sd_event_source *event,
                                          int fd,
                                          uint32_t revents,
@@ -315,6 +303,8 @@ static int get_source_for_fd(RemoteServer *s,
         Writer *writer;
         int r;
 
+        /* This takes ownership of name, but only on success. */
+
         assert(fd >= 0);
         assert(source);
 
@@ -322,11 +312,9 @@ static int get_source_for_fd(RemoteServer *s,
                 return log_oom();
 
         r = get_writer(s, name, &writer);
-        if (r < 0) {
-                log_warning("Failed to get writer for source %s: %s",
-                            name, strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_warning_errno(r, "Failed to get writer for source %s: %m",
+                                         name);
 
         if (s->sources[fd] == NULL) {
                 s->sources[fd] = source_new(fd, false, name, writer);
@@ -364,6 +352,8 @@ static int add_source(RemoteServer *s, int fd, char* name, bool own_name) {
         RemoteSource *source;
         int r;
 
+        /* This takes ownership of name, even on failure, if own_name is true. */
+
         assert(s);
         assert(fd >= 0);
         assert(name);
@@ -376,17 +366,38 @@ static int add_source(RemoteServer *s, int fd, char* name, bool own_name) {
 
         r = get_source_for_fd(s, fd, name, &source);
         if (r < 0) {
-                log_error("Failed to create source for fd:%d (%s): %s",
-                          fd, name, strerror(-r));
+                log_error_errno(r, "Failed to create source for fd:%d (%s): %m",
+                                fd, name);
+                free(name);
                 return r;
         }
 
         r = sd_event_add_io(s->events, &source->event,
                             fd, EPOLLIN|EPOLLRDHUP|EPOLLPRI,
-                            dispatch_raw_source_event, s);
+                            dispatch_raw_source_event, source);
+        if (r == 0) {
+                /* Add additional source for buffer processing. It will be
+                 * enabled later. */
+                r = sd_event_add_defer(s->events, &source->buffer_event,
+                                       dispatch_raw_source_until_block, source);
+                if (r == 0)
+                        sd_event_source_set_enabled(source->buffer_event, SD_EVENT_OFF);
+        } else if (r == -EPERM) {
+                log_debug("Falling back to sd_event_add_defer for fd:%d (%s)", fd, name);
+                r = sd_event_add_defer(s->events, &source->event,
+                                       dispatch_blocking_source_event, source);
+                if (r == 0)
+                        sd_event_source_set_enabled(source->event, SD_EVENT_ON);
+        }
         if (r < 0) {
-                log_error("Failed to register event source for fd:%d: %s",
-                          fd, strerror(-r));
+                log_error_errno(r, "Failed to register event source for fd:%d: %m",
+                                fd);
+                goto error;
+        }
+
+        r = sd_event_source_set_description(source->event, name);
+        if (r < 0) {
+                log_error_errno(r, "Failed to set source name for fd:%d: %m", fd);
                 goto error;
         }
 
@@ -399,15 +410,24 @@ static int add_source(RemoteServer *s, int fd, char* name, bool own_name) {
 
 static int add_raw_socket(RemoteServer *s, int fd) {
         int r;
+        _cleanup_close_ int fd_ = fd;
+        char name[sizeof("raw-socket-")-1 + DECIMAL_STR_MAX(int) + 1];
+
+        assert(fd >= 0);
 
         r = sd_event_add_io(s->events, &s->listen_event,
                             fd, EPOLLIN,
                             dispatch_raw_connection_event, s);
-        if (r < 0) {
-                close(fd);
+        if (r < 0)
+                return r;
+
+        xsprintf(name, "raw-socket-%d", fd);
+
+        r = sd_event_source_set_description(s->listen_event, name);
+        if (r < 0)
                 return r;
-        }
 
+        fd_ = -1;
         s->active ++;
         return 0;
 }
@@ -426,33 +446,30 @@ static int setup_raw_socket(RemoteServer *s, const char *address) {
  **********************************************************************
  **********************************************************************/
 
-static RemoteSource *request_meta(void **connection_cls, int fd, char *hostname) {
+static int request_meta(void **connection_cls, int fd, char *hostname) {
         RemoteSource *source;
         Writer *writer;
         int r;
 
         assert(connection_cls);
         if (*connection_cls)
-                return *connection_cls;
+                return 0;
 
         r = get_writer(server, hostname, &writer);
-        if (r < 0) {
-                log_warning("Failed to get writer for source %s: %s",
-                            hostname, strerror(-r));
-                return NULL;
-        }
+        if (r < 0)
+                return log_warning_errno(r, "Failed to get writer for source %s: %m",
+                                         hostname);
 
         source = source_new(fd, true, hostname, writer);
         if (!source) {
-                log_oom();
                 writer_unref(writer);
-                return NULL;
+                return log_oom();
         }
 
         log_debug("Added RemoteSource as connection metadata %p", source);
 
         *connection_cls = source;
-        return source;
+        return 0;
 }
 
 static void request_meta_free(void *cls,
@@ -464,9 +481,11 @@ static void request_meta_free(void *cls,
         assert(connection_cls);
         s = *connection_cls;
 
-        log_debug("Cleaning up connection metadata %p", s);
-        source_free(s);
-        *connection_cls = NULL;
+        if (s) {
+                log_debug("Cleaning up connection metadata %p", s);
+                source_free(s);
+                *connection_cls = NULL;
+        }
 }
 
 static int process_http_upload(
@@ -481,11 +500,11 @@ static int process_http_upload(
 
         assert(source);
 
-        log_debug("request_handler_upload: connection %p, %zu bytes",
-                  connection, *upload_data_size);
+        log_trace("%s: connection %p, %zu bytes",
+                  __func__, connection, *upload_data_size);
 
         if (*upload_data_size) {
-                log_debug("Received %zu bytes", *upload_data_size);
+                log_trace("Received %zu bytes", *upload_data_size);
 
                 r = push_data(source, upload_data, *upload_data_size);
                 if (r < 0)
@@ -548,7 +567,7 @@ static int request_handler(
         assert(url);
         assert(method);
 
-        log_debug("Handling a connection %s %s %s", method, url, version);
+        log_trace("Handling a connection %s %s %s", method, url, version);
 
         if (*connection_cls)
                 return process_http_upload(connection,
@@ -599,8 +618,13 @@ static int request_handler(
 
         assert(hostname);
 
-        if (!request_meta(connection_cls, fd, hostname))
+        r = request_meta(connection_cls, fd, hostname);
+        if (r == -ENOMEM)
                 return respond_oom(connection);
+        else if (r < 0)
+                return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                   strerror(-r));
+
         hostname = NULL;
         return MHD_YES;
 }
@@ -632,10 +656,8 @@ static int setup_microhttpd_server(RemoteServer *s,
         assert(fd >= 0);
 
         r = fd_nonblock(fd, true);
-        if (r < 0) {
-                log_error("Failed to make fd:%d nonblocking: %s", fd, strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to make fd:%d nonblocking: %m", fd);
 
         if (key) {
                 assert(cert);
@@ -691,11 +713,17 @@ static int setup_microhttpd_server(RemoteServer *s,
                             epoll_fd, EPOLLIN,
                             dispatch_http_event, d);
         if (r < 0) {
-                log_error("Failed to add event callback: %s", strerror(-r));
+                log_error_errno(r, "Failed to add event callback: %m");
+                goto error;
+        }
+
+        r = sd_event_source_set_description(d->event, "epoll-fd");
+        if (r < 0) {
+                log_error_errno(r, "Failed to set source name: %m");
                 goto error;
         }
 
-        r = hashmap_ensure_allocated(&s->daemons, uint64_hash_func, uint64_compare_func);
+        r = hashmap_ensure_allocated(&s->daemons, &uint64_hash_ops);
         if (r < 0) {
                 log_oom();
                 goto error;
@@ -703,7 +731,7 @@ static int setup_microhttpd_server(RemoteServer *s,
 
         r = hashmap_put(s->daemons, &d->fd, d);
         if (r < 0) {
-                log_error("Failed to add daemon to hashmap: %s", strerror(-r));
+                log_error_errno(r, "Failed to add daemon to hashmap: %m");
                 goto error;
         }
 
@@ -724,7 +752,7 @@ static int setup_microhttpd_socket(RemoteServer *s,
                                    const char *trust) {
         int fd;
 
-        fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM | SOCK_CLOEXEC);
+        fd = make_socket_fd(LOG_DEBUG, address, SOCK_STREAM | SOCK_CLOEXEC);
         if (fd < 0)
                 return fd;
 
@@ -754,19 +782,6 @@ static int dispatch_http_event(sd_event_source *event,
  **********************************************************************
  **********************************************************************/
 
-static int dispatch_sigterm(sd_event_source *event,
-                            const struct signalfd_siginfo *si,
-                            void *userdata) {
-        RemoteServer *s = userdata;
-
-        assert(s);
-
-        log_received_signal(LOG_INFO, si);
-
-        sd_event_exit(s->events, 0);
-        return 0;
-}
-
 static int setup_signals(RemoteServer *s) {
         sigset_t mask;
         int r;
@@ -777,27 +792,30 @@ static int setup_signals(RemoteServer *s) {
         sigset_add_many(&mask, SIGINT, SIGTERM, -1);
         assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
 
-        r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, dispatch_sigterm, s);
+        r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s);
         if (r < 0)
                 return r;
 
-        r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, dispatch_sigterm, s);
+        r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s);
         if (r < 0)
                 return r;
 
         return 0;
 }
 
-static int fd_fd(const char *spec) {
+static int negative_fd(const char *spec) {
+        /* Return a non-positive number as its inverse, -EINVAL otherwise. */
+
         int fd, r;
 
         r = safe_atoi(spec, &fd);
         if (r < 0)
                 return r;
-        if (fd < 0)
-                return -EINVAL;
 
-        return fd;
+        if (fd > 0)
+                return -EINVAL;
+        else
+                return -fd;
 }
 
 static int remoteserver_init(RemoteServer *s,
@@ -814,20 +832,24 @@ static int remoteserver_init(RemoteServer *s,
                 return -EINVAL;
         }
 
-        sd_event_default(&s->events);
+        r = sd_event_default(&s->events);
+        if (r < 0)
+                return log_error_errno(r, "Failed to allocate event loop: %m");
 
         setup_signals(s);
 
         assert(server == NULL);
         server = s;
 
+        r = init_writer_hashmap(s);
+        if (r < 0)
+                return r;
+
         n = sd_listen_fds(true);
-        if (n < 0) {
-                log_error("Failed to read listening file descriptors from environment: %s",
-                          strerror(-n));
-                return n;
-        } else
-                log_info("Received %d descriptors", n);
+        if (n < 0)
+                return log_error_errno(n, "Failed to read listening file descriptors from environment: %m");
+        else
+                log_debug("Received %d descriptors", n);
 
         if (MAX(http_socket, https_socket) >= SD_LISTEN_FDS_START + n) {
                 log_error("Received fewer sockets than expected");
@@ -835,8 +857,8 @@ static int remoteserver_init(RemoteServer *s,
         }
 
         for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
-                if (sd_is_socket(fd, AF_UNSPEC, 0, false)) {
-                        log_info("Received a listening socket (fd:%d)", fd);
+                if (sd_is_socket(fd, AF_UNSPEC, 0, true)) {
+                        log_debug("Received a listening socket (fd:%d)", fd);
 
                         if (fd == http_socket)
                                 r = setup_microhttpd_server(s, fd, NULL, NULL, NULL);
@@ -844,37 +866,31 @@ static int remoteserver_init(RemoteServer *s,
                                 r = setup_microhttpd_server(s, fd, key, cert, trust);
                         else
                                 r = add_raw_socket(s, fd);
-                } else if (sd_is_socket(fd, AF_UNSPEC, 0, true)) {
+                } else if (sd_is_socket(fd, AF_UNSPEC, 0, false)) {
                         char *hostname;
 
                         r = getnameinfo_pretty(fd, &hostname);
-                        if (r < 0) {
-                                log_error("Failed to retrieve remote name: %s", strerror(-r));
-                                return r;
-                        }
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to retrieve remote name: %m");
 
-                        log_info("Received a connection socket (fd:%d) from %s", fd, hostname);
+                        log_debug("Received a connection socket (fd:%d) from %s", fd, hostname);
 
                         r = add_source(s, fd, hostname, true);
-                        if (r < 0)
-                                free(hostname);
                 } else {
                         log_error("Unknown socket passed on fd:%d", fd);
 
                         return -EINVAL;
                 }
 
-                if(r < 0) {
-                        log_error("Failed to register socket (fd:%d): %s",
-                                  fd, strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_error_errno(r, "Failed to register socket (fd:%d): %m",
+                                               fd);
         }
 
         if (arg_url) {
                 const char *url, *hostname;
 
-                url = strappenda(arg_url, "/entries");
+                url = strjoina(arg_url, "/entries");
 
                 if (arg_getter) {
                         log_info("Spawning getter %s...", url);
@@ -897,7 +913,7 @@ static int remoteserver_init(RemoteServer *s,
         }
 
         if (arg_listen_raw) {
-                log_info("Listening on a socket...");
+                log_debug("Listening on a socket...");
                 r = setup_raw_socket(s, arg_listen_raw);
                 if (r < 0)
                         return r;
@@ -919,18 +935,16 @@ static int remoteserver_init(RemoteServer *s,
                 const char *output_name;
 
                 if (streq(*file, "-")) {
-                        log_info("Using standard input as source.");
+                        log_debug("Using standard input as source.");
 
                         fd = STDIN_FILENO;
                         output_name = "stdin";
                 } else {
-                        log_info("Reading file %s...", *file);
+                        log_debug("Reading file %s...", *file);
 
                         fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
-                        if (fd < 0) {
-                                log_error("Failed to open %s: %m", *file);
-                                return -errno;
-                        }
+                        if (fd < 0)
+                                return log_error_errno(errno, "Failed to open %s: %m", *file);
                         output_name = *file;
                 }
 
@@ -944,10 +958,6 @@ static int remoteserver_init(RemoteServer *s,
                 return -EINVAL;
         }
 
-        r = init_writer_hashmap(s);
-        if (r < 0)
-                return r;
-
         if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE) {
                 /* In this case we know what the writer will be
                    called, so we can create it and verify that we can
@@ -992,15 +1002,18 @@ static void server_destroy(RemoteServer *s) {
  **********************************************************************
  **********************************************************************/
 
-static int dispatch_raw_source_event(sd_event_source *event,
-                                     int fd,
-                                     uint32_t revents,
-                                     void *userdata) {
+static int handle_raw_source(sd_event_source *event,
+                             int fd,
+                             uint32_t revents,
+                             RemoteServer *s) {
 
-        RemoteServer *s = userdata;
         RemoteSource *source;
         int r;
 
+        /* Returns 1 if there might be more data pending,
+         * 0 if data is currently exhausted, negative on error.
+         */
+
         assert(fd >= 0 && fd < (ssize_t) s->sources_size);
         source = s->sources[fd];
         assert(source->fd == fd);
@@ -1009,38 +1022,80 @@ static int dispatch_raw_source_event(sd_event_source *event,
         if (source->state == STATE_EOF) {
                 size_t remaining;
 
-                log_info("EOF reached with source fd:%d (%s)",
-                         source->fd, source->name);
+                log_debug("EOF reached with source fd:%d (%s)",
+                          source->fd, source->name);
 
                 remaining = source_non_empty(source);
                 if (remaining > 0)
-                        log_warning("Premature EOF. %zu bytes lost.", remaining);
+                        log_notice("Premature EOF. %zu bytes lost.", remaining);
                 remove_source(s, source->fd);
-                log_info("%zd active sources remaining", s->active);
+                log_debug("%zu active sources remaining", s->active);
                 return 0;
         } else if (r == -E2BIG) {
-                log_error("Entry too big, skipped");
+                log_notice_errno(E2BIG, "Entry too big, skipped");
                 return 1;
-        } else if (r == -EAGAIN) {
+        } else if (r == -EAGAIN || r == -EWOULDBLOCK) {
                 return 0;
         } else if (r < 0) {
-                log_info("Closing connection: %s", strerror(-r));
+                log_debug_errno(r, "Closing connection: %m");
                 remove_source(server, fd);
                 return 0;
         } else
                 return 1;
 }
 
+static int dispatch_raw_source_until_block(sd_event_source *event,
+                                           void *userdata) {
+        RemoteSource *source = userdata;
+        int r;
+
+        /* Make sure event stays around even if source is destroyed */
+        sd_event_source_ref(event);
+
+        r = handle_raw_source(event, source->fd, EPOLLIN, server);
+        if (r != 1)
+                /* No more data for now */
+                sd_event_source_set_enabled(event, SD_EVENT_OFF);
+
+        sd_event_source_unref(event);
+
+        return r;
+}
+
+static int dispatch_raw_source_event(sd_event_source *event,
+                                     int fd,
+                                     uint32_t revents,
+                                     void *userdata) {
+        RemoteSource *source = userdata;
+        int r;
+
+        assert(source->event);
+        assert(source->buffer_event);
+
+        r = handle_raw_source(event, fd, EPOLLIN, server);
+        if (r == 1)
+                /* Might have more data. We need to rerun the handler
+                 * until we are sure the buffer is exhausted. */
+                sd_event_source_set_enabled(source->buffer_event, SD_EVENT_ON);
+
+        return r;
+}
+
+static int dispatch_blocking_source_event(sd_event_source *event,
+                                          void *userdata) {
+        RemoteSource *source = userdata;
+
+        return handle_raw_source(event, source->fd, EPOLLIN, server);
+}
+
 static int accept_connection(const char* type, int fd,
                              SocketAddress *addr, char **hostname) {
         int fd2, r;
 
         log_debug("Accepting new %s connection on fd:%d", type, fd);
         fd2 = accept4(fd, &addr->sockaddr.sa, &addr->size, SOCK_NONBLOCK|SOCK_CLOEXEC);
-        if (fd2 < 0) {
-                log_error("accept() on fd:%d failed: %m", fd);
-                return -errno;
-        }
+        if (fd2 < 0)
+                return log_error_errno(errno, "accept() on fd:%d failed: %m", fd);
 
         switch(socket_address_family(addr)) {
         case AF_INET:
@@ -1050,7 +1105,7 @@ static int accept_connection(const char* type, int fd,
 
                 r = socket_address_print(addr, &a);
                 if (r < 0) {
-                        log_error("socket_address_print(): %s", strerror(-r));
+                        log_error_errno(r, "socket_address_print(): %m");
                         close(fd2);
                         return r;
                 }
@@ -1061,10 +1116,10 @@ static int accept_connection(const char* type, int fd,
                         return r;
                 }
 
-                log_info("Accepted %s %s connection from %s",
-                         type,
-                         socket_address_family(addr) == AF_INET ? "IP" : "IPv6",
-                         a);
+                log_debug("Accepted %s %s connection from %s",
+                          type,
+                          socket_address_family(addr) == AF_INET ? "IP" : "IPv6",
+                          a);
 
                 *hostname = b;
 
@@ -1084,7 +1139,7 @@ static int dispatch_raw_connection_event(sd_event_source *event,
                                          uint32_t revents,
                                          void *userdata) {
         RemoteServer *s = userdata;
-        int fd2, r;
+        int fd2;
         SocketAddress addr = {
                 .size = sizeof(union sockaddr_union),
                 .type = SOCK_STREAM,
@@ -1095,10 +1150,7 @@ static int dispatch_raw_connection_event(sd_event_source *event,
         if (fd2 < 0)
                 return fd2;
 
-        r = add_source(s, fd2, hostname, true);
-        if (r < 0)
-                free(hostname);
-        return r;
+        return add_source(s, fd2, hostname, true);
 }
 
 /**********************************************************************
@@ -1124,33 +1176,34 @@ static int parse_config(void) {
                 { "Remote",  "TrustedCertificateFile", config_parse_path,             0, &arg_trust      },
                 {}};
 
-        return config_parse(NULL, PKGSYSCONFDIR "/journal-remote.conf", NULL,
-                            "Remote\0",
-                            config_item_table_lookup, items,
-                            false, false, true, NULL);
+        return config_parse_many(PKGSYSCONFDIR "/journal-remote.conf",
+                                 CONF_DIRS_NULSTR("systemd/journal-remote.conf"),
+                                 "Remote\0", config_item_table_lookup, items,
+                                 false, NULL);
 }
 
 static void help(void) {
         printf("%s [OPTIONS...] {FILE|-}...\n\n"
                "Write external journal events to journal file(s).\n\n"
-               "  -h --help               Show this help\n"
-               "     --version            Show package version\n"
-               "     --url=URL            Read events from systemd-journal-gatewayd at URL\n"
-               "     --getter=COMMAND     Read events from the output of COMMAND\n"
-               "     --listen-raw=ADDR    Listen for connections at ADDR\n"
-               "     --listen-http=ADDR   Listen for HTTP connections at ADDR\n"
-               "     --listen-https=ADDR  Listen for HTTPS connections at ADDR\n"
-               "  -o --output=FILE|DIR Write output to FILE or DIR/external-*.journal\n"
-               "     --compress[=BOOL]    Use XZ-compression in the output journal (default: yes)\n"
-               "     --seal[=BOOL]        Use Event sealing in the output journal (default: no)\n"
-               "     --key=FILENAME       Specify key in PEM format (default:\n"
-               "                          \"" PRIV_KEY_FILE "\")\n"
-               "     --cert=FILENAME      Specify certificate in PEM format (default:\n"
-               "                          \"" CERT_FILE "\")\n"
-               "     --trust=FILENAME|all Specify CA certificate or disable checking (default:\n"
-               "                          \"" TRUST_FILE "\")\n"
+               "  -h --help                 Show this help\n"
+               "     --version              Show package version\n"
+               "     --url=URL              Read events from systemd-journal-gatewayd at URL\n"
+               "     --getter=COMMAND       Read events from the output of COMMAND\n"
+               "     --listen-raw=ADDR      Listen for connections at ADDR\n"
+               "     --listen-http=ADDR     Listen for HTTP connections at ADDR\n"
+               "     --listen-https=ADDR    Listen for HTTPS connections at ADDR\n"
+               "  -o --output=FILE|DIR      Write output to FILE or DIR/external-*.journal\n"
+               "     --compress[=BOOL]      XZ-compress the output journal (default: yes)\n"
+               "     --seal[=BOOL]          Use event sealing (default: no)\n"
+               "     --key=FILENAME         SSL key in PEM format (default:\n"
+               "                            \"" PRIV_KEY_FILE "\")\n"
+               "     --cert=FILENAME        SSL certificate in PEM format (default:\n"
+               "                            \"" CERT_FILE "\")\n"
+               "     --trust=FILENAME|all   SSL CA certificate or disable checking (default:\n"
+               "                            \"" TRUST_FILE "\")\n"
                "     --gnutls-log=CATEGORY...\n"
-               "                          Specify a list of gnutls logging categories\n"
+               "                            Specify a list of gnutls logging categories\n"
+               "     --split-mode=none|host How many output files to create\n"
                "\n"
                "Note: file descriptors from sd_listen_fds() will be consumed, too.\n"
                , program_invocation_short_name);
@@ -1242,7 +1295,7 @@ static int parse_argv(int argc, char *argv[]) {
                                 return -EINVAL;
                         }
 
-                        r = fd_fd(optarg);
+                        r = negative_fd(optarg);
                         if (r >= 0)
                                 http_socket = r;
                         else
@@ -1255,7 +1308,7 @@ static int parse_argv(int argc, char *argv[]) {
                                 return -EINVAL;
                         }
 
-                        r = fd_fd(optarg);
+                        r = negative_fd(optarg);
                         if (r >= 0)
                                 https_socket = r;
                         else
@@ -1429,28 +1482,22 @@ static int load_certificates(char **key, char **cert, char **trust) {
         int r;
 
         r = read_full_file(arg_key ?: PRIV_KEY_FILE, key, NULL);
-        if (r < 0) {
-                log_error("Failed to read key from file '%s': %s",
-                          arg_key ?: PRIV_KEY_FILE, strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to read key from file '%s': %m",
+                                       arg_key ?: PRIV_KEY_FILE);
 
         r = read_full_file(arg_cert ?: CERT_FILE, cert, NULL);
-        if (r < 0) {
-                log_error("Failed to read certificate from file '%s': %s",
-                          arg_cert ?: CERT_FILE, strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to read certificate from file '%s': %m",
+                                       arg_cert ?: CERT_FILE);
 
         if (arg_trust_all)
                 log_info("Certificate checking disabled.");
         else {
                 r = read_full_file(arg_trust ?: TRUST_FILE, trust, NULL);
-                if (r < 0) {
-                        log_error("Failed to read CA certificate file '%s': %s",
-                                  arg_trust ?: TRUST_FILE, strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_error_errno(r, "Failed to read CA certificate file '%s': %m",
+                                               arg_trust ?: TRUST_FILE);
         }
 
         return 0;
@@ -1467,13 +1514,13 @@ static int setup_gnutls_logger(char **categories) {
 
                 gnutls_global_set_log_function(log_func_gnutls);
 
-                if (categories)
+                if (categories) {
                         STRV_FOREACH(cat, categories) {
                                 r = log_enable_gnutls_category(*cat);
                                 if (r < 0)
                                         return r;
                         }
-                else
+                else
                         log_reset_gnutls_level();
         }
 #endif
@@ -1508,7 +1555,11 @@ int main(int argc, char **argv) {
         if (remoteserver_init(&s, key, cert, trust) < 0)
                 return EXIT_FAILURE;
 
-        sd_event_set_watchdog(s.events, true);
+        r = sd_event_set_watchdog(s.events, true);
+        if (r < 0)
+                log_error_errno(r, "Failed to enable watchdog: %m");
+        else
+                log_debug("Watchdog is %s.", r > 0 ? "enabled" : "disabled");
 
         log_debug("%s running as pid "PID_FMT,
                   program_invocation_short_name, getpid());
@@ -1525,7 +1576,7 @@ int main(int argc, char **argv) {
 
                 r = sd_event_run(s.events, -1);
                 if (r < 0) {
-                        log_error("Failed to run event loop: %s", strerror(-r));
+                        log_error_errno(r, "Failed to run event loop: %m");
                         break;
                 }
         }