diff options
Diffstat (limited to 'src/grp-journal/grp-remote/systemd-journal-remote')
14 files changed, 3045 insertions, 0 deletions
diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/GNUmakefile b/src/grp-journal/grp-remote/systemd-journal-remote/GNUmakefile new file mode 120000 index 0000000000..13308a50cd --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/GNUmakefile @@ -0,0 +1 @@ +../../../../GNUmakefile
\ No newline at end of file diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/Makefile b/src/grp-journal/grp-remote/systemd-journal-remote/Makefile new file mode 100644 index 0000000000..ce902b7f62 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/Makefile @@ -0,0 +1,79 @@ +# -*- Mode: makefile; indent-tabs-mode: t -*- +# +# This file is part of systemd. +# +# Copyright 2010-2012 Lennart Poettering +# Copyright 2010-2012 Kay Sievers +# Copyright 2013 Zbigniew Jędrzejewski-Szmek +# Copyright 2013 David Strauss +# Copyright 2016 Luke Shumaker +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# systemd is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public License +# along with systemd; If not, see <http://www.gnu.org/licenses/>. +include $(dir $(lastword $(MAKEFILE_LIST)))/../../../../config.mk +include $(topsrcdir)/build-aux/Makefile.head.mk + +ifneq ($(HAVE_MICROHTTPD),) +rootlibexec_PROGRAMS += \ + systemd-journal-remote + +systemd_journal_remote_SOURCES = \ + src/journal-remote/journal-remote-parse.h \ + src/journal-remote/journal-remote-parse.c \ + src/journal-remote/journal-remote-write.h \ + src/journal-remote/journal-remote-write.c \ + src/journal-remote/journal-remote.h \ + src/journal-remote/journal-remote.c + +systemd_journal_remote_LDADD = \ + libjournal-core.la + +systemd_journal_remote_SOURCES += \ + src/journal-remote/microhttpd-util.h \ + src/journal-remote/microhttpd-util.c + +systemd_journal_remote_CFLAGS = \ + $(MICROHTTPD_CFLAGS) + +systemd_journal_remote_LDADD += \ + $(MICROHTTPD_LIBS) + +ifneq ($(HAVE_GNUTLS),) +systemd_journal_remote_LDADD += \ + $(GNUTLS_LIBS) +endif # HAVE_GNUTLS + +# systemd-journal-remote make sense mostly with full crypto stack +dist_systemunit_DATA += \ + units/systemd-journal-remote.socket + +nodist_systemunit_DATA += \ + units/systemd-journal-remote.service + +journal-remote-install-hook: journal-install-hook + -$(MKDIR_P) $(DESTDIR)/var/log/journal/remote + -chown 0:0 $(DESTDIR)/var/log/journal/remote + -chmod 755 $(DESTDIR)/var/log/journal/remote + +INSTALL_EXEC_HOOKS += journal-remote-install-hook + +nodist_pkgsysconf_DATA += \ + src/journal-remote/journal-remote.conf + +EXTRA_DIST += \ + units/systemd-journal-remote.service.in \ + src/journal-remote/journal-remote.conf.in \ + src/journal-remote/log-generator.py +endif # HAVE_MICROHTTPD + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-parse.c b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-parse.c new file mode 100644 index 0000000000..fdfa692214 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-parse.c @@ -0,0 +1,507 @@ +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "journal-core/journald-native.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/string-util.h" + +#include "journal-remote-parse.h" + +#define LINE_CHUNK 8*1024u + +void source_free(RemoteSource *source) { + if (!source) + return; + + if (source->fd >= 0 && !source->passive_fd) { + log_debug("Closing fd:%d (%s)", source->fd, source->name); + safe_close(source->fd); + } + + free(source->name); + free(source->buf); + iovw_free_contents(&source->iovw); + + log_debug("Writer ref count %i", source->writer->n_ref); + writer_unref(source->writer); + + sd_event_source_unref(source->event); + sd_event_source_unref(source->buffer_event); + + free(source); +} + +/** + * Initialize zero-filled source with given values. On success, takes + * ownerhship of fd and writer, otherwise does not touch them. + */ +RemoteSource* source_new(int fd, bool passive_fd, char *name, Writer *writer) { + + RemoteSource *source; + + log_debug("Creating source for %sfd:%d (%s)", + passive_fd ? "passive " : "", fd, name); + + assert(fd >= 0); + + source = new0(RemoteSource, 1); + if (!source) + return NULL; + + source->fd = fd; + source->passive_fd = passive_fd; + source->name = name; + source->writer = writer; + + return source; +} + +static char* realloc_buffer(RemoteSource *source, size_t size) { + char *b, *old = source->buf; + + b = GREEDY_REALLOC(source->buf, source->size, size); + if (!b) + return NULL; + + iovw_rebase(&source->iovw, old, source->buf); + + return b; +} + +static int get_line(RemoteSource *source, char **line, size_t *size) { + ssize_t n; + char *c = NULL; + + assert(source); + assert(source->state == STATE_LINE); + assert(source->offset <= source->filled); + assert(source->filled <= source->size); + assert(source->buf == NULL || source->size > 0); + assert(source->fd >= 0); + + for (;;) { + if (source->buf) { + size_t start = MAX(source->scanned, source->offset); + + c = memchr(source->buf + start, '\n', + source->filled - start); + if (c != NULL) + break; + } + + source->scanned = source->filled; + if (source->scanned >= DATA_SIZE_MAX) { + log_error("Entry is bigger than %u bytes.", DATA_SIZE_MAX); + return -E2BIG; + } + + if (source->passive_fd) + /* we have to wait for some data to come to us */ + return -EAGAIN; + + /* We know that source->filled is at most DATA_SIZE_MAX, so if + we reallocate it, we'll increase the size at least a bit. */ + assert_cc(DATA_SIZE_MAX < ENTRY_SIZE_MAX); + if (source->size - source->filled < LINE_CHUNK && + !realloc_buffer(source, MIN(source->filled + LINE_CHUNK, ENTRY_SIZE_MAX))) + return log_oom(); + + assert(source->buf); + assert(source->size - source->filled >= LINE_CHUNK || + source->size == ENTRY_SIZE_MAX); + + n = read(source->fd, + source->buf + source->filled, + source->size - source->filled); + if (n < 0) { + if (errno != EAGAIN) + log_error_errno(errno, "read(%d, ..., %zu): %m", + source->fd, + source->size - source->filled); + return -errno; + } else if (n == 0) + return 0; + + source->filled += n; + } + + *line = source->buf + source->offset; + *size = c + 1 - source->buf - source->offset; + source->offset += *size; + + return 1; +} + +int push_data(RemoteSource *source, const char *data, size_t size) { + assert(source); + assert(source->state != STATE_EOF); + + if (!realloc_buffer(source, source->filled + size)) { + log_error("Failed to store received data of size %zu " + "(in addition to existing %zu bytes with %zu filled): %s", + size, source->size, source->filled, strerror(ENOMEM)); + return -ENOMEM; + } + + memcpy(source->buf + source->filled, data, size); + source->filled += size; + + return 0; +} + +static int fill_fixed_size(RemoteSource *source, void **data, size_t size) { + + assert(source); + assert(source->state == STATE_DATA_START || + source->state == STATE_DATA || + source->state == STATE_DATA_FINISH); + assert(size <= DATA_SIZE_MAX); + assert(source->offset <= source->filled); + assert(source->filled <= source->size); + assert(source->buf != NULL || source->size == 0); + assert(source->buf == NULL || source->size > 0); + assert(source->fd >= 0); + assert(data); + + while (source->filled - source->offset < size) { + int n; + + if (source->passive_fd) + /* we have to wait for some data to come to us */ + return -EAGAIN; + + if (!realloc_buffer(source, source->offset + size)) + return log_oom(); + + n = read(source->fd, source->buf + source->filled, + source->size - source->filled); + if (n < 0) { + if (errno != EAGAIN) + log_error_errno(errno, "read(%d, ..., %zu): %m", source->fd, + source->size - source->filled); + return -errno; + } else if (n == 0) + return 0; + + source->filled += n; + } + + *data = source->buf + source->offset; + source->offset += size; + + return 1; +} + +static int get_data_size(RemoteSource *source) { + int r; + void *data; + + assert(source); + assert(source->state == STATE_DATA_START); + assert(source->data_size == 0); + + r = fill_fixed_size(source, &data, sizeof(uint64_t)); + if (r <= 0) + return r; + + source->data_size = le64toh( *(uint64_t *) data ); + if (source->data_size > DATA_SIZE_MAX) { + log_error("Stream declares field with size %zu > DATA_SIZE_MAX = %u", + source->data_size, DATA_SIZE_MAX); + return -EINVAL; + } + if (source->data_size == 0) + log_warning("Binary field with zero length"); + + return 1; +} + +static int get_data_data(RemoteSource *source, void **data) { + int r; + + assert(source); + assert(data); + assert(source->state == STATE_DATA); + + r = fill_fixed_size(source, data, source->data_size); + if (r <= 0) + return r; + + return 1; +} + +static int get_data_newline(RemoteSource *source) { + int r; + char *data; + + assert(source); + assert(source->state == STATE_DATA_FINISH); + + r = fill_fixed_size(source, (void**) &data, 1); + if (r <= 0) + return r; + + assert(data); + if (*data != '\n') { + log_error("expected newline, got '%c'", *data); + return -EINVAL; + } + + return 1; +} + +static int process_dunder(RemoteSource *source, char *line, size_t n) { + const char *timestamp; + int r; + + assert(line); + assert(n > 0); + assert(line[n-1] == '\n'); + + /* XXX: is it worth to support timestamps in extended format? + * We don't produce them, but who knows... */ + + timestamp = startswith(line, "__CURSOR="); + if (timestamp) + /* ignore __CURSOR */ + return 1; + + timestamp = startswith(line, "__REALTIME_TIMESTAMP="); + if (timestamp) { + long long unsigned x; + line[n-1] = '\0'; + r = safe_atollu(timestamp, &x); + if (r < 0) + log_warning("Failed to parse __REALTIME_TIMESTAMP: '%s'", timestamp); + else + source->ts.realtime = x; + return r < 0 ? r : 1; + } + + timestamp = startswith(line, "__MONOTONIC_TIMESTAMP="); + if (timestamp) { + long long unsigned x; + line[n-1] = '\0'; + r = safe_atollu(timestamp, &x); + if (r < 0) + log_warning("Failed to parse __MONOTONIC_TIMESTAMP: '%s'", timestamp); + else + source->ts.monotonic = x; + return r < 0 ? r : 1; + } + + timestamp = startswith(line, "__"); + if (timestamp) { + log_notice("Unknown dunder line %s", line); + return 1; + } + + /* no dunder */ + return 0; +} + +static int process_data(RemoteSource *source) { + int r; + + switch(source->state) { + case STATE_LINE: { + char *line, *sep; + size_t n = 0; + + assert(source->data_size == 0); + + r = get_line(source, &line, &n); + if (r < 0) + return r; + if (r == 0) { + source->state = STATE_EOF; + return r; + } + assert(n > 0); + assert(line[n-1] == '\n'); + + if (n == 1) { + log_trace("Received empty line, event is ready"); + return 1; + } + + r = process_dunder(source, line, n); + if (r != 0) + return r < 0 ? r : 0; + + /* MESSAGE=xxx\n + or + COREDUMP\n + LLLLLLLL0011223344...\n + */ + sep = memchr(line, '=', n); + if (sep) { + /* chomp newline */ + n--; + + r = iovw_put(&source->iovw, line, n); + if (r < 0) + return r; + } else { + /* replace \n with = */ + line[n-1] = '='; + + source->field_len = n; + source->state = STATE_DATA_START; + + /* we cannot put the field in iovec until we have all data */ + } + + log_trace("Received: %.*s (%s)", (int) n, line, sep ? "text" : "binary"); + + return 0; /* continue */ + } + + case STATE_DATA_START: + assert(source->data_size == 0); + + r = get_data_size(source); + // log_debug("get_data_size() -> %d", r); + if (r < 0) + return r; + if (r == 0) { + source->state = STATE_EOF; + return 0; + } + + source->state = source->data_size > 0 ? + STATE_DATA : STATE_DATA_FINISH; + + return 0; /* continue */ + + case STATE_DATA: { + void *data; + char *field; + + assert(source->data_size > 0); + + r = get_data_data(source, &data); + // log_debug("get_data_data() -> %d", r); + if (r < 0) + return r; + if (r == 0) { + source->state = STATE_EOF; + return 0; + } + + assert(data); + + field = (char*) data - sizeof(uint64_t) - source->field_len; + memmove(field + sizeof(uint64_t), field, source->field_len); + + r = iovw_put(&source->iovw, field + sizeof(uint64_t), source->field_len + source->data_size); + if (r < 0) + return r; + + source->state = STATE_DATA_FINISH; + + return 0; /* continue */ + } + + case STATE_DATA_FINISH: + r = get_data_newline(source); + // log_debug("get_data_newline() -> %d", r); + if (r < 0) + return r; + if (r == 0) { + source->state = STATE_EOF; + return 0; + } + + source->data_size = 0; + source->state = STATE_LINE; + + return 0; /* continue */ + default: + assert_not_reached("wtf?"); + } +} + +int process_source(RemoteSource *source, bool compress, bool seal) { + size_t remain, target; + int r; + + assert(source); + assert(source->writer); + + r = process_data(source); + if (r <= 0) + return r; + + /* We have a full event */ + log_trace("Received full event from source@%p fd:%d (%s)", + source, source->fd, source->name); + + if (!source->iovw.count) { + log_warning("Entry with no payload, skipping"); + goto freeing; + } + + assert(source->iovw.iovec); + assert(source->iovw.count); + + r = writer_write(source->writer, &source->iovw, &source->ts, compress, seal); + if (r < 0) + log_error_errno(r, "Failed to write entry of %zu bytes: %m", + iovw_size(&source->iovw)); + else + r = 1; + + freeing: + iovw_free_contents(&source->iovw); + + /* possibly reset buffer position */ + remain = source->filled - source->offset; + + if (remain == 0) /* no brainer */ + source->offset = source->scanned = source->filled = 0; + else if (source->offset > source->size - source->filled && + source->offset > remain) { + memcpy(source->buf, source->buf + source->offset, remain); + source->offset = source->scanned = 0; + source->filled = remain; + } + + target = source->size; + while (target > 16 * LINE_CHUNK && source->filled < target / 2) + target /= 2; + if (target < source->size) { + char *tmp; + + tmp = realloc(source->buf, target); + if (!tmp) + log_warning("Failed to reallocate buffer to (smaller) size %zu", + target); + else { + log_debug("Reallocated buffer from %zu to %zu bytes", + source->size, target); + source->buf = tmp; + source->size = target; + } + } + + return r; +} diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-parse.h b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-parse.h new file mode 100644 index 0000000000..4f47ea89d6 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-parse.h @@ -0,0 +1,69 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <systemd/sd-event.h> + +#include "journal-remote-write.h" + +typedef enum { + STATE_LINE = 0, /* waiting to read, or reading line */ + STATE_DATA_START, /* reading binary data header */ + STATE_DATA, /* reading binary data */ + STATE_DATA_FINISH, /* expecting newline */ + STATE_EOF, /* done */ +} source_state; + +typedef struct RemoteSource { + char *name; + int fd; + bool passive_fd; + + char *buf; + size_t size; /* total size of the buffer */ + size_t offset; /* offset to the beginning of live data in the buffer */ + size_t scanned; /* number of bytes since the beginning of data without a newline */ + size_t filled; /* total number of bytes in the buffer */ + + size_t field_len; /* used for binary fields: the field name length */ + size_t data_size; /* and the size of the binary data chunk being processed */ + + struct iovec_wrapper iovw; + + source_state state; + dual_timestamp ts; + + Writer *writer; + + sd_event_source *event; + sd_event_source *buffer_event; +} RemoteSource; + +RemoteSource* source_new(int fd, bool passive_fd, char *name, Writer *writer); + +static inline size_t source_non_empty(RemoteSource *source) { + assert(source); + + return source->filled; +} + +void source_free(RemoteSource *source); +int push_data(RemoteSource *source, const char *data, size_t size); +int process_source(RemoteSource *source, bool compress, bool seal); diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c new file mode 100644 index 0000000000..99b02602ea --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c @@ -0,0 +1,165 @@ +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "systemd-basic/alloc-util.h" + +#include "journal-remote.h" + +int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len) { + if (!GREEDY_REALLOC(iovw->iovec, iovw->size_bytes, iovw->count + 1)) + return log_oom(); + + iovw->iovec[iovw->count++] = (struct iovec) {data, len}; + return 0; +} + +void iovw_free_contents(struct iovec_wrapper *iovw) { + iovw->iovec = mfree(iovw->iovec); + iovw->size_bytes = iovw->count = 0; +} + +size_t iovw_size(struct iovec_wrapper *iovw) { + size_t n = 0, i; + + for (i = 0; i < iovw->count; i++) + n += iovw->iovec[i].iov_len; + + return n; +} + +void iovw_rebase(struct iovec_wrapper *iovw, char *old, char *new) { + size_t i; + + for (i = 0; i < iovw->count; i++) + iovw->iovec[i].iov_base = (char*) iovw->iovec[i].iov_base - old + new; +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int do_rotate(JournalFile **f, bool compress, bool seal) { + int r = journal_file_rotate(f, compress, seal, NULL); + if (r < 0) { + if (*f) + log_error_errno(r, "Failed to rotate %s: %m", (*f)->path); + else + log_error_errno(r, "Failed to create rotated journal: %m"); + } + + return r; +} + +Writer* writer_new(RemoteServer *server) { + Writer *w; + + w = new0(Writer, 1); + if (!w) + return NULL; + + memset(&w->metrics, 0xFF, sizeof(w->metrics)); + + w->mmap = mmap_cache_new(); + if (!w->mmap) + return mfree(w); + + w->n_ref = 1; + w->server = server; + + return w; +} + +Writer* writer_free(Writer *w) { + if (!w) + return NULL; + + if (w->journal) { + log_debug("Closing journal file %s.", w->journal->path); + journal_file_close(w->journal); + } + + if (w->server && w->hashmap_key) + hashmap_remove(w->server->writers, w->hashmap_key); + + free(w->hashmap_key); + + if (w->mmap) + mmap_cache_unref(w->mmap); + + return mfree(w); +} + +Writer* writer_unref(Writer *w) { + if (w && (-- w->n_ref <= 0)) + writer_free(w); + + return NULL; +} + +Writer* writer_ref(Writer *w) { + if (w) + assert_se(++ w->n_ref >= 2); + + return w; +} + +int writer_write(Writer *w, + struct iovec_wrapper *iovw, + dual_timestamp *ts, + bool compress, + bool seal) { + int r; + + assert(w); + assert(iovw); + assert(iovw->count > 0); + + if (journal_file_rotate_suggested(w->journal, 0)) { + log_info("%s: Journal header limits reached or header out-of-date, rotating", + w->journal->path); + r = do_rotate(&w->journal, compress, seal); + if (r < 0) + return r; + } + + r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count, + &w->seqnum, NULL, NULL); + if (r >= 0) { + if (w->server) + w->server->event_count += 1; + return 1; + } + + log_debug_errno(r, "%s: Write failed, rotating: %m", w->journal->path); + r = do_rotate(&w->journal, compress, seal); + if (r < 0) + return r; + else + log_debug("%s: Successfully rotated journal", w->journal->path); + + log_debug("Retrying write."); + r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count, + &w->seqnum, NULL, NULL); + if (r < 0) + return r; + + if (w->server) + w->server->event_count += 1; + return 1; +} diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.h b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.h new file mode 100644 index 0000000000..a61434ca75 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.h @@ -0,0 +1,70 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "sd-journal/journal-file.h" + +typedef struct RemoteServer RemoteServer; + +struct iovec_wrapper { + struct iovec *iovec; + size_t size_bytes; + size_t count; +}; + +int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len); +void iovw_free_contents(struct iovec_wrapper *iovw); +size_t iovw_size(struct iovec_wrapper *iovw); +void iovw_rebase(struct iovec_wrapper *iovw, char *old, char *new); + +typedef struct Writer { + JournalFile *journal; + JournalMetrics metrics; + + MMapCache *mmap; + RemoteServer *server; + char *hashmap_key; + + uint64_t seqnum; + + int n_ref; +} Writer; + +Writer* writer_new(RemoteServer* server); +Writer* writer_free(Writer *w); + +Writer* writer_ref(Writer *w); +Writer* writer_unref(Writer *w); + +DEFINE_TRIVIAL_CLEANUP_FUNC(Writer*, writer_unref); +#define _cleanup_writer_unref_ _cleanup_(writer_unrefp) + +int writer_write(Writer *s, + struct iovec_wrapper *iovw, + dual_timestamp *ts, + bool compress, + bool seal); + +typedef enum JournalWriteSplitMode { + JOURNAL_WRITE_SPLIT_NONE, + JOURNAL_WRITE_SPLIT_HOST, + _JOURNAL_WRITE_SPLIT_MAX, + _JOURNAL_WRITE_SPLIT_INVALID = -1 +} JournalWriteSplitMode; diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.c b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.c new file mode 100644 index 0000000000..476f4d27a8 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.c @@ -0,0 +1,1598 @@ +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/prctl.h> +#include <sys/socket.h> +#include <unistd.h> + +#include <systemd/sd-daemon.h> + +#include "journal-core/journald-native.h" +#include "sd-journal/journal-file.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/def.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/macro.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/socket-util.h" +#include "systemd-basic/stat-util.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/strv.h" +#include "systemd-shared/conf-parser.h" + +#include "journal-remote-write.h" +#include "journal-remote.h" + +#define REMOTE_JOURNAL_PATH "/var/log/journal/remote" + +#define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-remote.pem" +#define CERT_FILE CERTIFICATE_ROOT "/certs/journal-remote.pem" +#define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem" + +static char* arg_url = NULL; +static char* arg_getter = NULL; +static char* arg_listen_raw = NULL; +static char* arg_listen_http = NULL; +static char* arg_listen_https = NULL; +static char** arg_files = NULL; +static int arg_compress = true; +static int arg_seal = false; +static int http_socket = -1, https_socket = -1; +static char** arg_gnutls_log = NULL; + +static JournalWriteSplitMode arg_split_mode = JOURNAL_WRITE_SPLIT_HOST; +static char* arg_output = NULL; + +static char *arg_key = NULL; +static char *arg_cert = NULL; +static char *arg_trust = NULL; +static bool arg_trust_all = false; + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int spawn_child(const char* child, char** argv) { + int fd[2]; + pid_t parent_pid, child_pid; + int r; + + 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 = log_error_errno(errno, "Failed to fork: %m"); + safe_close_pair(fd); + return r; + } + + /* In the child */ + if (child_pid == 0) { + + (void) reset_all_signal_handlers(); + (void) reset_signal_mask(); + + r = dup2(fd[1], STDOUT_FILENO); + if (r < 0) { + log_error_errno(errno, "Failed to dup pipe to stdout: %m"); + _exit(EXIT_FAILURE); + } + + safe_close_pair(fd); + + /* Make sure the child goes away when the parent dies */ + if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) + _exit(EXIT_FAILURE); + + /* Check whether our parent died before we were able + * to set the death signal */ + if (getppid() != parent_pid) + _exit(EXIT_SUCCESS); + + execvp(child, argv); + log_error_errno(errno, "Failed to exec child %s: %m", child); + _exit(EXIT_FAILURE); + } + + r = close(fd[1]); + if (r < 0) + log_warning_errno(errno, "Failed to close write end of pipe: %m"); + + r = fd_nonblock(fd[0], true); + if (r < 0) + log_warning_errno(errno, "Failed to set child pipe to non-blocking: %m"); + + return fd[0]; +} + +static int spawn_curl(const char* url) { + char **argv = STRV_MAKE("curl", + "-HAccept: application/vnd.fdo.journal", + "--silent", + "--show-error", + url); + int r; + + r = spawn_child("curl", argv); + if (r < 0) + log_error_errno(r, "Failed to spawn curl: %m"); + return r; +} + +static int spawn_getter(const char *getter) { + int r; + _cleanup_strv_free_ char **words = NULL; + + assert(getter); + r = strv_split_extract(&words, getter, WHITESPACE, EXTRACT_QUOTES); + if (r < 0) + return log_error_errno(r, "Failed to split getter option: %m"); + + r = spawn_child(words[0], words); + if (r < 0) + log_error_errno(r, "Failed to spawn getter %s: %m", getter); + + return r; +} + +#define filename_escape(s) xescape((s), "/ ") + +static int open_output(Writer *w, const char* host) { + _cleanup_free_ char *_output = NULL; + const char *output; + int r; + + switch (arg_split_mode) { + case JOURNAL_WRITE_SPLIT_NONE: + output = arg_output ?: REMOTE_JOURNAL_PATH "/remote.journal"; + break; + + case JOURNAL_WRITE_SPLIT_HOST: { + _cleanup_free_ char *name; + + assert(host); + + name = filename_escape(host); + if (!name) + return log_oom(); + + r = asprintf(&_output, "%s/remote-%s.journal", + arg_output ?: REMOTE_JOURNAL_PATH, + name); + if (r < 0) + return log_oom(); + + output = _output; + break; + } + + default: + assert_not_reached("what?"); + } + + r = journal_file_open_reliably(output, + O_RDWR|O_CREAT, 0640, + arg_compress, arg_seal, + &w->metrics, + w->mmap, NULL, + NULL, &w->journal); + if (r < 0) + log_error_errno(r, "Failed to open output journal %s: %m", + output); + else + log_debug("Opened output file %s", w->journal->path); + return r; +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int init_writer_hashmap(RemoteServer *s) { + 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(hash_ops)); + + s->writers = hashmap_new(hash_ops[arg_split_mode]); + if (!s->writers) + return log_oom(); + + return 0; +} + +static int get_writer(RemoteServer *s, const char *host, + Writer **writer) { + const void *key; + _cleanup_writer_unref_ Writer *w = NULL; + int r; + + switch(arg_split_mode) { + case JOURNAL_WRITE_SPLIT_NONE: + key = "one and only"; + break; + + case JOURNAL_WRITE_SPLIT_HOST: + assert(host); + key = host; + break; + + default: + assert_not_reached("what split mode?"); + } + + w = hashmap_get(s->writers, key); + if (w) + writer_ref(w); + else { + w = writer_new(s); + if (!w) + return log_oom(); + + if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST) { + w->hashmap_key = strdup(key); + if (!w->hashmap_key) + return log_oom(); + } + + r = open_output(w, host); + if (r < 0) + return r; + + r = hashmap_put(s->writers, w->hashmap_key ?: key, w); + if (r < 0) + return r; + } + + *writer = w; + w = NULL; + return 0; +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +/* This should go away as soon as µhttpd allows state to be passed around. */ +static RemoteServer *server; + +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, + void *userdata); +static int dispatch_http_event(sd_event_source *event, + int fd, + uint32_t revents, + void *userdata); + +static int get_source_for_fd(RemoteServer *s, + int fd, char *name, RemoteSource **source) { + Writer *writer; + int r; + + /* This takes ownership of name, but only on success. */ + + assert(fd >= 0); + assert(source); + + if (!GREEDY_REALLOC0(s->sources, s->sources_size, fd + 1)) + return log_oom(); + + r = get_writer(s, name, &writer); + 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); + if (!s->sources[fd]) { + writer_unref(writer); + return log_oom(); + } + + s->active++; + } + + *source = s->sources[fd]; + return 0; +} + +static int remove_source(RemoteServer *s, int fd) { + RemoteSource *source; + + assert(s); + assert(fd >= 0 && fd < (ssize_t) s->sources_size); + + source = s->sources[fd]; + if (source) { + /* this closes fd too */ + source_free(source); + s->sources[fd] = NULL; + s->active--; + } + + return 0; +} + +static int add_source(RemoteServer *s, int fd, char* name, bool own_name) { + + RemoteSource *source = NULL; + int r; + + /* This takes ownership of name, even on failure, if own_name is true. */ + + assert(s); + assert(fd >= 0); + assert(name); + + if (!own_name) { + name = strdup(name); + if (!name) + return log_oom(); + } + + r = get_source_for_fd(s, fd, name, &source); + if (r < 0) { + 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, 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_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; + } + + return 1; /* work to do */ + + error: + remove_source(s, fd); + return r; +} + +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) + 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; +} + +static int setup_raw_socket(RemoteServer *s, const char *address) { + int fd; + + fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM, SOCK_CLOEXEC); + if (fd < 0) + return fd; + + return add_raw_socket(s, fd); +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int request_meta(void **connection_cls, int fd, char *hostname) { + RemoteSource *source; + Writer *writer; + int r; + + assert(connection_cls); + if (*connection_cls) + return 0; + + r = get_writer(server, hostname, &writer); + 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) { + writer_unref(writer); + return log_oom(); + } + + log_debug("Added RemoteSource as connection metadata %p", source); + + *connection_cls = source; + return 0; +} + +static void request_meta_free(void *cls, + struct MHD_Connection *connection, + void **connection_cls, + enum MHD_RequestTerminationCode toe) { + RemoteSource *s; + + assert(connection_cls); + s = *connection_cls; + + if (s) { + log_debug("Cleaning up connection metadata %p", s); + source_free(s); + *connection_cls = NULL; + } +} + +static int process_http_upload( + struct MHD_Connection *connection, + const char *upload_data, + size_t *upload_data_size, + RemoteSource *source) { + + bool finished = false; + size_t remaining; + int r; + + assert(source); + + log_trace("%s: connection %p, %zu bytes", + __func__, connection, *upload_data_size); + + if (*upload_data_size) { + log_trace("Received %zu bytes", *upload_data_size); + + r = push_data(source, upload_data, *upload_data_size); + if (r < 0) + return mhd_respond_oom(connection); + + *upload_data_size = 0; + } else + finished = true; + + for (;;) { + r = process_source(source, arg_compress, arg_seal); + if (r == -EAGAIN) + break; + else if (r < 0) { + log_warning("Failed to process data for connection %p", connection); + if (r == -E2BIG) + return mhd_respondf(connection, + r, MHD_HTTP_REQUEST_ENTITY_TOO_LARGE, + "Entry is too large, maximum is " STRINGIFY(DATA_SIZE_MAX) " bytes."); + else + return mhd_respondf(connection, + r, MHD_HTTP_UNPROCESSABLE_ENTITY, + "Processing failed: %m."); + } + } + + if (!finished) + return MHD_YES; + + /* The upload is finished */ + + remaining = source_non_empty(source); + if (remaining > 0) { + log_warning("Premature EOF byte. %zu bytes lost.", remaining); + return mhd_respondf(connection, + 0, MHD_HTTP_EXPECTATION_FAILED, + "Premature EOF. %zu bytes of trailing data not processed.", + remaining); + } + + return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK."); +}; + +static int request_handler( + void *cls, + struct MHD_Connection *connection, + const char *url, + const char *method, + const char *version, + const char *upload_data, + size_t *upload_data_size, + void **connection_cls) { + + const char *header; + int r, code, fd; + _cleanup_free_ char *hostname = NULL; + + assert(connection); + assert(connection_cls); + assert(url); + assert(method); + + log_trace("Handling a connection %s %s %s", method, url, version); + + if (*connection_cls) + return process_http_upload(connection, + upload_data, upload_data_size, + *connection_cls); + + if (!streq(method, "POST")) + return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method."); + + if (!streq(url, "/upload")) + return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found."); + + header = MHD_lookup_connection_value(connection, + MHD_HEADER_KIND, "Content-Type"); + if (!header || !streq(header, "application/vnd.fdo.journal")) + return mhd_respond(connection, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE, + "Content-Type: application/vnd.fdo.journal is required."); + + { + const union MHD_ConnectionInfo *ci; + + ci = MHD_get_connection_info(connection, + MHD_CONNECTION_INFO_CONNECTION_FD); + if (!ci) { + log_error("MHD_get_connection_info failed: cannot get remote fd"); + return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, + "Cannot check remote address."); + } + + fd = ci->connect_fd; + assert(fd >= 0); + } + + if (server->check_trust) { + r = check_permissions(connection, &code, &hostname); + if (r < 0) + return code; + } else { + r = getpeername_pretty(fd, false, &hostname); + if (r < 0) + return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, + "Cannot check remote hostname."); + } + + assert(hostname); + + r = request_meta(connection_cls, fd, hostname); + if (r == -ENOMEM) + return respond_oom(connection); + else if (r < 0) + return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "%m"); + + hostname = NULL; + return MHD_YES; +} + +static int setup_microhttpd_server(RemoteServer *s, + int fd, + const char *key, + const char *cert, + const char *trust) { + struct MHD_OptionItem opts[] = { + { MHD_OPTION_NOTIFY_COMPLETED, (intptr_t) request_meta_free}, + { MHD_OPTION_EXTERNAL_LOGGER, (intptr_t) microhttpd_logger}, + { MHD_OPTION_LISTEN_SOCKET, fd}, + { MHD_OPTION_CONNECTION_MEMORY_LIMIT, 128*1024}, + { MHD_OPTION_END}, + { MHD_OPTION_END}, + { MHD_OPTION_END}, + { MHD_OPTION_END}}; + int opts_pos = 4; + int flags = + MHD_USE_DEBUG | + MHD_USE_DUAL_STACK | + MHD_USE_EPOLL_LINUX_ONLY | + MHD_USE_PEDANTIC_CHECKS | + MHD_USE_PIPE_FOR_SHUTDOWN; + + const union MHD_DaemonInfo *info; + int r, epoll_fd; + MHDDaemonWrapper *d; + + assert(fd >= 0); + + r = fd_nonblock(fd, true); + if (r < 0) + return log_error_errno(r, "Failed to make fd:%d nonblocking: %m", fd); + + if (key) { + assert(cert); + + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_KEY, 0, (char*) key}; + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_CERT, 0, (char*) cert}; + + flags |= MHD_USE_SSL; + + if (trust) + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_TRUST, 0, (char*) trust}; + } + + d = new(MHDDaemonWrapper, 1); + if (!d) + return log_oom(); + + d->fd = (uint64_t) fd; + + d->daemon = MHD_start_daemon(flags, 0, + NULL, NULL, + request_handler, NULL, + MHD_OPTION_ARRAY, opts, + MHD_OPTION_END); + if (!d->daemon) { + log_error("Failed to start µhttp daemon"); + r = -EINVAL; + goto error; + } + + log_debug("Started MHD %s daemon on fd:%d (wrapper @ %p)", + key ? "HTTPS" : "HTTP", fd, d); + + + info = MHD_get_daemon_info(d->daemon, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY); + if (!info) { + log_error("µhttp returned NULL daemon info"); + r = -EOPNOTSUPP; + goto error; + } + + epoll_fd = info->listen_fd; + if (epoll_fd < 0) { + log_error("µhttp epoll fd is invalid"); + r = -EUCLEAN; + goto error; + } + + r = sd_event_add_io(s->events, &d->event, + epoll_fd, EPOLLIN, + dispatch_http_event, d); + if (r < 0) { + 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_ops); + if (r < 0) { + log_oom(); + goto error; + } + + r = hashmap_put(s->daemons, &d->fd, d); + if (r < 0) { + log_error_errno(r, "Failed to add daemon to hashmap: %m"); + goto error; + } + + s->active++; + return 0; + +error: + MHD_stop_daemon(d->daemon); + free(d->daemon); + free(d); + return r; +} + +static int setup_microhttpd_socket(RemoteServer *s, + const char *address, + const char *key, + const char *cert, + const char *trust) { + int fd; + + fd = make_socket_fd(LOG_DEBUG, address, SOCK_STREAM, SOCK_CLOEXEC); + if (fd < 0) + return fd; + + return setup_microhttpd_server(s, fd, key, cert, trust); +} + +static int dispatch_http_event(sd_event_source *event, + int fd, + uint32_t revents, + void *userdata) { + MHDDaemonWrapper *d = userdata; + int r; + + assert(d); + + r = MHD_run(d->daemon); + if (r == MHD_NO) { + log_error("MHD_run failed!"); + // XXX: unregister daemon + return -EINVAL; + } + + return 1; /* work to do */ +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int setup_signals(RemoteServer *s) { + int r; + + assert(s); + + assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0); + + 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, NULL, s); + if (r < 0) + return r; + + return 0; +} + +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; + else + return -fd; +} + +static int remoteserver_init(RemoteServer *s, + const char* key, + const char* cert, + const char* trust) { + int r, n, fd; + char **file; + + assert(s); + + if ((arg_listen_raw || arg_listen_http) && trust) { + log_error("Option --trust makes all non-HTTPS connections untrusted."); + return -EINVAL; + } + + 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) + 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"); + return -EBADFD; + } + + for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; 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); + else if (fd == https_socket) + 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, false)) { + char *hostname; + + r = getpeername_pretty(fd, false, &hostname); + if (r < 0) + return log_error_errno(r, "Failed to retrieve remote name: %m"); + + log_debug("Received a connection socket (fd:%d) from %s", fd, hostname); + + r = add_source(s, fd, hostname, true); + } else { + log_error("Unknown socket passed on fd:%d", fd); + + return -EINVAL; + } + + if (r < 0) + return log_error_errno(r, "Failed to register socket (fd:%d): %m", + fd); + } + + if (arg_getter) { + log_info("Spawning getter %s...", arg_getter); + fd = spawn_getter(arg_getter); + if (fd < 0) + return fd; + + r = add_source(s, fd, (char*) arg_output, false); + if (r < 0) + return r; + } + + if (arg_url) { + const char *url; + char *hostname, *p; + + if (!strstr(arg_url, "/entries")) { + if (endswith(arg_url, "/")) + url = strjoina(arg_url, "entries"); + else + url = strjoina(arg_url, "/entries"); + } + else + url = strdupa(arg_url); + + log_info("Spawning curl %s...", url); + fd = spawn_curl(url); + if (fd < 0) + return fd; + + hostname = + startswith(arg_url, "https://") ?: + startswith(arg_url, "http://") ?: + arg_url; + + hostname = strdupa(hostname); + if ((p = strchr(hostname, '/'))) + *p = '\0'; + if ((p = strchr(hostname, ':'))) + *p = '\0'; + + r = add_source(s, fd, hostname, false); + if (r < 0) + return r; + } + + if (arg_listen_raw) { + log_debug("Listening on a socket..."); + r = setup_raw_socket(s, arg_listen_raw); + if (r < 0) + return r; + } + + if (arg_listen_http) { + r = setup_microhttpd_socket(s, arg_listen_http, NULL, NULL, NULL); + if (r < 0) + return r; + } + + if (arg_listen_https) { + r = setup_microhttpd_socket(s, arg_listen_https, key, cert, trust); + if (r < 0) + return r; + } + + STRV_FOREACH(file, arg_files) { + const char *output_name; + + if (streq(*file, "-")) { + log_debug("Using standard input as source."); + + fd = STDIN_FILENO; + output_name = "stdin"; + } else { + log_debug("Reading file %s...", *file); + + fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); + if (fd < 0) + return log_error_errno(errno, "Failed to open %s: %m", *file); + output_name = *file; + } + + r = add_source(s, fd, (char*) output_name, false); + if (r < 0) + return r; + } + + if (s->active == 0) { + log_error("Zero sources specified"); + return -EINVAL; + } + + 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 + create output as expected. */ + r = get_writer(s, NULL, &s->_single_writer); + if (r < 0) + return r; + } + + return 0; +} + +static void server_destroy(RemoteServer *s) { + size_t i; + MHDDaemonWrapper *d; + + while ((d = hashmap_steal_first(s->daemons))) { + MHD_stop_daemon(d->daemon); + sd_event_source_unref(d->event); + free(d); + } + + hashmap_free(s->daemons); + + assert(s->sources_size == 0 || s->sources); + for (i = 0; i < s->sources_size; i++) + remove_source(s, i); + free(s->sources); + + writer_unref(s->_single_writer); + hashmap_free(s->writers); + + sd_event_source_unref(s->sigterm_event); + sd_event_source_unref(s->sigint_event); + sd_event_source_unref(s->listen_event); + sd_event_unref(s->events); + + /* fds that we're listening on remain open... */ +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int handle_raw_source(sd_event_source *event, + int fd, + uint32_t revents, + RemoteServer *s) { + + 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); + + r = process_source(source, arg_compress, arg_seal); + if (source->state == STATE_EOF) { + size_t remaining; + + log_debug("EOF reached with source fd:%d (%s)", + source->fd, source->name); + + remaining = source_non_empty(source); + if (remaining > 0) + log_notice("Premature EOF. %zu bytes lost.", remaining); + remove_source(s, source->fd); + log_debug("%zu active sources remaining", s->active); + return 0; + } else if (r == -E2BIG) { + log_notice_errno(E2BIG, "Entry too big, skipped"); + return 1; + } else if (r == -EAGAIN) { + return 0; + } else if (r < 0) { + 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) + return log_error_errno(errno, "accept() on fd:%d failed: %m", fd); + + switch(socket_address_family(addr)) { + case AF_INET: + case AF_INET6: { + _cleanup_free_ char *a = NULL; + char *b; + + r = socket_address_print(addr, &a); + if (r < 0) { + log_error_errno(r, "socket_address_print(): %m"); + close(fd2); + return r; + } + + r = socknameinfo_pretty(&addr->sockaddr, addr->size, &b); + if (r < 0) { + log_error_errno(r, "Resolving hostname failed: %m"); + close(fd2); + return r; + } + + log_debug("Accepted %s %s connection from %s", + type, + socket_address_family(addr) == AF_INET ? "IP" : "IPv6", + a); + + *hostname = b; + + return fd2; + }; + default: + log_error("Rejected %s connection with unsupported family %d", + type, socket_address_family(addr)); + close(fd2); + + return -EINVAL; + } +} + +static int dispatch_raw_connection_event(sd_event_source *event, + int fd, + uint32_t revents, + void *userdata) { + RemoteServer *s = userdata; + int fd2; + SocketAddress addr = { + .size = sizeof(union sockaddr_union), + .type = SOCK_STREAM, + }; + char *hostname = NULL; + + fd2 = accept_connection("raw", fd, &addr, &hostname); + if (fd2 < 0) + return fd2; + + return add_source(s, fd2, hostname, true); +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static const char* const journal_write_split_mode_table[_JOURNAL_WRITE_SPLIT_MAX] = { + [JOURNAL_WRITE_SPLIT_NONE] = "none", + [JOURNAL_WRITE_SPLIT_HOST] = "host", +}; + +DEFINE_PRIVATE_STRING_TABLE_LOOKUP(journal_write_split_mode, JournalWriteSplitMode); +static DEFINE_CONFIG_PARSE_ENUM(config_parse_write_split_mode, + journal_write_split_mode, + JournalWriteSplitMode, + "Failed to parse split mode setting"); + +static int parse_config(void) { + const ConfigTableItem items[] = { + { "Remote", "Seal", config_parse_bool, 0, &arg_seal }, + { "Remote", "SplitMode", config_parse_write_split_mode, 0, &arg_split_mode }, + { "Remote", "ServerKeyFile", config_parse_path, 0, &arg_key }, + { "Remote", "ServerCertificateFile", config_parse_path, 0, &arg_cert }, + { "Remote", "TrustedCertificateFile", config_parse_path, 0, &arg_trust }, + {}}; + + return config_parse_many_nulstr(PKGSYSCONFDIR "/journal-remote.conf", + CONF_PATHS_NULSTR("systemd/journal-remote.conf.d"), + "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] 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" + " --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); +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + ARG_URL, + ARG_LISTEN_RAW, + ARG_LISTEN_HTTP, + ARG_LISTEN_HTTPS, + ARG_GETTER, + ARG_SPLIT_MODE, + ARG_COMPRESS, + ARG_SEAL, + ARG_KEY, + ARG_CERT, + ARG_TRUST, + ARG_GNUTLS_LOG, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "url", required_argument, NULL, ARG_URL }, + { "getter", required_argument, NULL, ARG_GETTER }, + { "listen-raw", required_argument, NULL, ARG_LISTEN_RAW }, + { "listen-http", required_argument, NULL, ARG_LISTEN_HTTP }, + { "listen-https", required_argument, NULL, ARG_LISTEN_HTTPS }, + { "output", required_argument, NULL, 'o' }, + { "split-mode", required_argument, NULL, ARG_SPLIT_MODE }, + { "compress", optional_argument, NULL, ARG_COMPRESS }, + { "seal", optional_argument, NULL, ARG_SEAL }, + { "key", required_argument, NULL, ARG_KEY }, + { "cert", required_argument, NULL, ARG_CERT }, + { "trust", required_argument, NULL, ARG_TRUST }, + { "gnutls-log", required_argument, NULL, ARG_GNUTLS_LOG }, + {} + }; + + int c, r; + bool type_a, type_b; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "ho:", options, NULL)) >= 0) + switch(c) { + case 'h': + help(); + return 0 /* done */; + + case ARG_VERSION: + return version(); + + case ARG_URL: + if (arg_url) { + log_error("cannot currently set more than one --url"); + return -EINVAL; + } + + arg_url = optarg; + break; + + case ARG_GETTER: + if (arg_getter) { + log_error("cannot currently use --getter more than once"); + return -EINVAL; + } + + arg_getter = optarg; + break; + + case ARG_LISTEN_RAW: + if (arg_listen_raw) { + log_error("cannot currently use --listen-raw more than once"); + return -EINVAL; + } + + arg_listen_raw = optarg; + break; + + case ARG_LISTEN_HTTP: + if (arg_listen_http || http_socket >= 0) { + log_error("cannot currently use --listen-http more than once"); + return -EINVAL; + } + + r = negative_fd(optarg); + if (r >= 0) + http_socket = r; + else + arg_listen_http = optarg; + break; + + case ARG_LISTEN_HTTPS: + if (arg_listen_https || https_socket >= 0) { + log_error("cannot currently use --listen-https more than once"); + return -EINVAL; + } + + r = negative_fd(optarg); + if (r >= 0) + https_socket = r; + else + arg_listen_https = optarg; + + break; + + case ARG_KEY: + if (arg_key) { + log_error("Key file specified twice"); + return -EINVAL; + } + + arg_key = strdup(optarg); + if (!arg_key) + return log_oom(); + + break; + + case ARG_CERT: + if (arg_cert) { + log_error("Certificate file specified twice"); + return -EINVAL; + } + + arg_cert = strdup(optarg); + if (!arg_cert) + return log_oom(); + + break; + + case ARG_TRUST: + if (arg_trust || arg_trust_all) { + log_error("Confusing trusted CA configuration"); + return -EINVAL; + } + + if (streq(optarg, "all")) + arg_trust_all = true; + else { +#ifdef HAVE_GNUTLS + arg_trust = strdup(optarg); + if (!arg_trust) + return log_oom(); +#else + log_error("Option --trust is not available."); + return -EINVAL; +#endif + } + + break; + + case 'o': + if (arg_output) { + log_error("cannot use --output/-o more than once"); + return -EINVAL; + } + + arg_output = optarg; + break; + + case ARG_SPLIT_MODE: + arg_split_mode = journal_write_split_mode_from_string(optarg); + if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID) { + log_error("Invalid split mode: %s", optarg); + return -EINVAL; + } + break; + + case ARG_COMPRESS: + if (optarg) { + r = parse_boolean(optarg); + if (r < 0) { + log_error("Failed to parse --compress= parameter."); + return -EINVAL; + } + + arg_compress = !!r; + } else + arg_compress = true; + + break; + + case ARG_SEAL: + if (optarg) { + r = parse_boolean(optarg); + if (r < 0) { + log_error("Failed to parse --seal= parameter."); + return -EINVAL; + } + + arg_seal = !!r; + } else + arg_seal = true; + + break; + + case ARG_GNUTLS_LOG: { +#ifdef HAVE_GNUTLS + const char* p = optarg; + for (;;) { + _cleanup_free_ char *word = NULL; + + r = extract_first_word(&p, &word, ",", 0); + if (r < 0) + return log_error_errno(r, "Failed to parse --gnutls-log= argument: %m"); + + if (r == 0) + break; + + if (strv_push(&arg_gnutls_log, word) < 0) + return log_oom(); + + word = NULL; + } + break; +#else + log_error("Option --gnutls-log is not available."); + return -EINVAL; +#endif + } + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unknown option code."); + } + + if (optind < argc) + arg_files = argv + optind; + + type_a = arg_getter || !strv_isempty(arg_files); + type_b = arg_url + || arg_listen_raw + || arg_listen_http || arg_listen_https + || sd_listen_fds(false) > 0; + if (type_a && type_b) { + log_error("Cannot use file input or --getter with " + "--arg-listen-... or socket activation."); + return -EINVAL; + } + if (type_a) { + if (!arg_output) { + log_error("Option --output must be specified with file input or --getter."); + return -EINVAL; + } + + arg_split_mode = JOURNAL_WRITE_SPLIT_NONE; + } + + if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE + && arg_output && is_dir(arg_output, true) > 0) { + log_error("For SplitMode=none, output must be a file."); + return -EINVAL; + } + + if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST + && arg_output && is_dir(arg_output, true) <= 0) { + log_error("For SplitMode=host, output must be a directory."); + return -EINVAL; + } + + log_debug("Full config: SplitMode=%s Key=%s Cert=%s Trust=%s", + journal_write_split_mode_to_string(arg_split_mode), + strna(arg_key), + strna(arg_cert), + strna(arg_trust)); + + return 1 /* work to do */; +} + +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) + 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) + 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) + return log_error_errno(r, "Failed to read CA certificate file '%s': %m", + arg_trust ?: TRUST_FILE); + } + + return 0; +} + +int main(int argc, char **argv) { + RemoteServer s = {}; + int r; + _cleanup_free_ char *key = NULL, *cert = NULL, *trust = NULL; + + log_show_color(true); + log_parse_environment(); + + r = parse_config(); + if (r < 0) + return EXIT_FAILURE; + + r = parse_argv(argc, argv); + if (r <= 0) + return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE; + + + if (arg_listen_http || arg_listen_https) { + r = setup_gnutls_logger(arg_gnutls_log); + if (r < 0) + return EXIT_FAILURE; + } + + if (arg_listen_https || https_socket >= 0) + if (load_certificates(&key, &cert, &trust) < 0) + return EXIT_FAILURE; + + if (remoteserver_init(&s, key, cert, trust) < 0) + return EXIT_FAILURE; + + 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 %sd.", enable_disable(r > 0)); + + log_debug("%s running as pid "PID_FMT, + program_invocation_short_name, getpid()); + sd_notify(false, + "READY=1\n" + "STATUS=Processing requests..."); + + while (s.active) { + r = sd_event_get_state(s.events); + if (r < 0) + break; + if (r == SD_EVENT_FINISHED) + break; + + r = sd_event_run(s.events, -1); + if (r < 0) { + log_error_errno(r, "Failed to run event loop: %m"); + break; + } + } + + sd_notifyf(false, + "STOPPING=1\n" + "STATUS=Shutting down after writing %" PRIu64 " entries...", s.event_count); + log_info("Finishing after writing %" PRIu64 " entries", s.event_count); + + server_destroy(&s); + + free(arg_key); + free(arg_cert); + free(arg_trust); + + return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE; +} diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.conf.in b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.conf.in new file mode 100644 index 0000000000..7122d63362 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.conf.in @@ -0,0 +1,6 @@ +[Remote] +# Seal=false +# SplitMode=host +# ServerKeyFile=@CERTIFICATEROOT@/private/journal-remote.pem +# ServerCertificateFile=@CERTIFICATEROOT@/certs/journal-remote.pem +# TrustedCertificateFile=@CERTIFICATEROOT@/ca/trusted.pem diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.conf.xml b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.conf.xml new file mode 100644 index 0000000000..f7ac8c46e0 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.conf.xml @@ -0,0 +1,120 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2015 Chris Morgan + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="journal-remote.conf" conditional='HAVE_MICROHTTPD' + xmlns:xi="http://www.w3.org/2001/XInclude"> + <refentryinfo> + <title>journal-remote.conf</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Chris</firstname> + <surname>Morgan</surname> + <email>chmorgan@gmail.com</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>journal-remote.conf</refentrytitle> + <manvolnum>5</manvolnum> + </refmeta> + + <refnamediv> + <refname>journal-remote.conf</refname> + <refname>journal-remote.conf.d</refname> + <refpurpose>Configuration files for the service accepting remote journal uploads</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>/etc/systemd/journal-remote.conf</filename></para> + <para><filename>/etc/systemd/journal-remote.conf.d/*.conf</filename></para> + <para><filename>/run/systemd/journal-remote.conf.d/*.conf</filename></para> + <para><filename>/usr/lib/systemd/journal-remote.conf.d/*.conf</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para>These files configure various parameters of + <citerefentry><refentrytitle>systemd-journal-remote.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> + </refsect1> + + <xi:include href="standard-conf.xml" xpointer="main-conf" /> + + <refsect1> + <title>Options</title> + + <para>All options are configured in the + <literal>[Remote]</literal> section:</para> + + <variablelist> + <varlistentry> + <term><varname>Seal=</varname></term> + + <listitem><para>Periodically sign the data in the journal using Forward Secure Sealing. + </para></listitem> + </varlistentry> + + + <varlistentry> + <term><varname>SplitMode=</varname></term> + + <listitem><para>One of <literal>host</literal> or <literal>none</literal>. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>ServerKeyFile=</varname></term> + + <listitem><para>SSL key in PEM format.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>ServerCertificateFile=</varname></term> + + <listitem><para>SSL CA certificate in PEM format.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>TrustedCertificateFile=</varname></term> + + <listitem><para>SSL CA certificate.</para></listitem> + </varlistentry> + + </variablelist> + + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd-journal-remote</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.h b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.h new file mode 100644 index 0000000000..1c090ccdfc --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote.h @@ -0,0 +1,53 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <systemd/sd-event.h> + +#include "systemd-basic/hashmap.h" +#include "systemd-microhttpd/microhttpd-util.h" + +#include "journal-remote-parse.h" +#include "journal-remote-write.h" + +typedef struct MHDDaemonWrapper MHDDaemonWrapper; + +struct MHDDaemonWrapper { + uint64_t fd; + struct MHD_Daemon *daemon; + + sd_event_source *event; +}; + +struct RemoteServer { + RemoteSource **sources; + size_t sources_size; + size_t active; + + sd_event *events; + sd_event_source *sigterm_event, *sigint_event, *listen_event; + + Hashmap *writers; + Writer *_single_writer; + uint64_t event_count; + + bool check_trust; + Hashmap *daemons; +}; diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.service.in b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.service.in new file mode 100644 index 0000000000..753dd6c158 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.service.in @@ -0,0 +1,30 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Journal Remote Sink Service +Documentation=man:systemd-journal-remote(8) man:journal-remote.conf(5) +Requires=systemd-journal-remote.socket + +[Service] +ExecStart=@rootlibexecdir@/systemd-journal-remote --listen-https=-3 --output=/var/log/journal/remote/ +User=systemd-journal-remote +Group=systemd-journal-remote +WatchdogSec=3min +PrivateTmp=yes +PrivateDevices=yes +PrivateNetwork=yes +ProtectSystem=full +ProtectHome=yes +ProtectControlGroups=yes +ProtectKernelTunables=yes +MemoryDenyWriteExecute=yes +RestrictRealtime=yes +RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 + +[Install] +Also=systemd-journal-remote.socket diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.socket b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.socket new file mode 100644 index 0000000000..076dcae8a3 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.socket @@ -0,0 +1,15 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Journal Remote Sink Socket + +[Socket] +ListenStream=19532 + +[Install] +WantedBy=sockets.target diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.sysusers b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.sysusers new file mode 100644 index 0000000000..ca20c24896 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.sysusers @@ -0,0 +1,8 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +u systemd-journal-remote - "systemd Journal Remote" diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.xml b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.xml new file mode 100644 index 0000000000..ee2d5c2486 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/systemd-journal-remote.xml @@ -0,0 +1,324 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" +"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2012 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="systemd-journal-remote" conditional='HAVE_MICROHTTPD' + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>systemd-journal-remote</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Zbigniew</firstname> + <surname>Jędrzejewski-Szmek</surname> + <email>zbyszek@in.waw.pl</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-journal-remote</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-journal-remote</refname> + <refpurpose>Receive journal messages over the network</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>systemd-journal-remote</command> + <arg choice="opt" rep="repeat">OPTIONS</arg> + <arg choice="opt" rep="norepeat">-o/--output=<replaceable>DIR</replaceable>|<replaceable>FILE</replaceable></arg> + <arg choice="opt" rep="repeat">SOURCES</arg> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para> + <filename>systemd-journal-remote</filename> is a command to + receive serialized journal events and store them to the journal. + Input streams are in the + <ulink url="http://www.freedesktop.org/wiki/Software/systemd/export"> + Journal Export Format + </ulink>, + i.e. like the output from + <command>journalctl --output=export</command>. For transport over + the network, this serialized stream is usually carried over an + HTTPS connection. + </para> + </refsect1> + + <refsect1> + <title>Sources</title> + + <para> + Sources can be either "active" + (<command>systemd-journal-remote</command> requests and pulls + the data), or "passive" + (<command>systemd-journal-remote</command> waits for a + connection and then receives events pushed by the other side). + </para> + + <para> + <command>systemd-journal-remote</command> can read more than one + event stream at a time. They will be interleaved in the output + file. In case of "active" connections, each "source" is one + stream, and in case of "passive" connections, each connection can + result in a separate stream. Sockets can be configured in + "accept" mode (i.e. only one connection), or "listen" mode (i.e. + multiple connections, each resulting in a stream). + </para> + + <para> + When there are no more connections, and no more can be created + (there are no listening sockets), then + <command>systemd-journal-remote</command> will exit. + </para> + + <para>Active sources can be specified in the following + ways:</para> + + <variablelist> + <varlistentry> + <listitem><para>When <option>-</option> is given as a + positional argument, events will be read from standard input. + Other positional arguments will be treated as filenames + to open and read from.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--url=<replaceable>ADDRESS</replaceable></option></term> + + <listitem><para>With the + <option>--url=<replaceable>ADDRESS</replaceable></option> option, + events will be retrieved using HTTP from + <replaceable>ADDRESS</replaceable>. This URL should refer to the + root of a remote + <citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry> + instance, e.g. http://some.host:19531/ or + https://some.host:19531/.</para></listitem> + </varlistentry> + </variablelist> + + <para>Passive sources can be specified in the following + ways:</para> + + <variablelist> + <varlistentry> + <term><option>--listen-raw=<replaceable>ADDRESS</replaceable></option></term> + + <listitem><para><replaceable>ADDRESS</replaceable> must be an + address suitable for <option>ListenStream=</option> (cf. + <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>). + <command>systemd-journal-remote</command> will listen on this + socket for connections. Each connection is expected to be a + stream of journal events.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--listen-http=<replaceable>ADDRESS</replaceable></option></term> + <term><option>--listen-https=<replaceable>ADDRESS</replaceable></option></term> + + <listitem><para><replaceable>ADDRESS</replaceable> must be + either a negative integer, in which case it will be + interpreted as the (negated) file descriptor number, or an + address suitable for <option>ListenStream=</option> (c.f. + <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>). + In the first case, matching file descriptor must be inherited + through + <varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>. + In the second case, an HTTP or HTTPS server will be spawned on + this port, respectively for <option>--listen-http</option> and + <option>--listen-https</option>. Currently, only POST requests + to <filename>/upload</filename> with <literal>Content-Type: + application/vnd.fdo.journal</literal> are supported.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><varname>$LISTEN_FDS</varname></term> + + <listitem><para><command>systemd-journal-remote</command> + supports the + <varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname> + protocol. Open sockets inherited through socket activation + behave like those opened with <option>--listen-raw=</option> + described above, unless they are specified as an argument in + <option>--listen-http=-<replaceable>n</replaceable></option> + or + <option>--listen-https=-<replaceable>n</replaceable></option> + above. In the latter case, an HTTP or HTTPS server will be + spawned using this descriptor and connections must be made + over the HTTP protocol.</para> + </listitem> + </varlistentry> + + </variablelist> + </refsect1> + + <refsect1> + <title>Sinks</title> + + <para>The location of the output journal can be specified + with <option>-o</option> or <option>--output=</option>. For "active" + sources, this option is required. + </para> + + <variablelist> + <varlistentry> + <term><option>--output=<replaceable>FILE</replaceable></option></term> + + <listitem><para>Will write to this journal file. The filename + must end with <filename>.journal</filename>. The file will be + created if it does not exist. If necessary (journal file full, + or corrupted), the file will be renamed following normal + journald rules and a new journal file will be created in its + stead.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--output=<replaceable>DIR</replaceable></option></term> + + <listitem><para>Will create journal files underneath directory + <replaceable>DIR</replaceable>. The directory must exist. If + necessary (journal files over size, or corrupted), journal + files will be rotated following normal journald rules. Names + of files underneath <replaceable>DIR</replaceable> will be + generated using the rules described below.</para></listitem> + </varlistentry> + </variablelist> + + <para>If <option>--output=</option> is not used, the output + directory <filename>/var/log/journal/remote/</filename> will be + used. In case the output file is not specified, journal files + will be created underneath the selected directory. Files will be + called + <filename>remote-<replaceable>hostname</replaceable>.journal</filename>, + where the <replaceable>hostname</replaceable> part is the + escaped hostname of the source endpoint of the connection, or the + numerical address if the hostname cannot be determined.</para> + + <para>In case of "active" sources, the output file name must + always be given explicitly.</para> + </refsect1> + + <refsect1> + <title>Options</title> + + <para>The following options are understood:</para> + + <variablelist> + <varlistentry> + <term><option>--split-mode</option></term> + + <listitem><para>One of <constant>none</constant> or + <constant>host</constant>. For the first, only one output + journal file is used. For the latter, a separate output file + is used, based on the hostname of the other endpoint of a + connection.</para> + + <para>In case of "active" sources, the output file name must + always be given explicitly and only <constant>none</constant> + is allowed.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--compress</option> [<replaceable>BOOL</replaceable>]</term> + + <listitem><para>If this is set to <literal>yes</literal> then compress + the data in the journal using XZ. The default is <literal>yes</literal>. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--seal</option> [<replaceable>BOOL</replaceable>]</term> + + <listitem><para>If this is set to <literal>yes</literal> then + periodically sign the data in the journal using Forward Secure Sealing. + The default is <literal>no</literal>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--getter=<replaceable>PROG --option1 --option2</replaceable></option></term> + + <listitem><para>Program to invoke to retrieve data. The journal + event stream must be generated on standard output.</para> + + <para>Examples:</para> + + <programlisting>--getter='curl "-HAccept: application/vnd.fdo.journal" https://some.host:19531/'</programlisting> + + <programlisting>--getter='wget --header="Accept: application/vnd.fdo.journal" -O- https://some.host:19531/'</programlisting> + </listitem> + </varlistentry> + + <xi:include href="standard-options.xml" xpointer="help" /> + <xi:include href="standard-options.xml" xpointer="version" /> + </variablelist> + </refsect1> + + <refsect1> + <title>Examples</title> + <para>Copy local journal events to a different journal directory: + <programlisting> +journalctl -o export | systemd-journal-remote -o /tmp/dir - + </programlisting> + </para> + + <para>Retrieve all available events from a remote + <citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry> + instance and store them in + <filename>/var/log/journal/remote/remote-some.host.journal</filename>: + <programlisting> +systemd-journal-remote --url http://some.host:19531/ + </programlisting> + </para> + + <para>Retrieve current boot events and wait for new events from a remote + <citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry> + instance, and store them in + <filename>/var/log/journal/remote/remote-some.host.journal</filename>: + <programlisting> +systemd-journal-remote --url http://some.host:19531/entries?boot&follow + </programlisting> + </para> +</refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd-journal-upload</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-journal-gatewayd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> + <citerefentry><refentrytitle>journal-remote.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + </para> + </refsect1> +</refentry> |