diff options
| author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-12 08:43:34 -0400 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-12 08:43:34 -0400 |
| commit | 670b77ddfab0f4eddbe539964aba83d446d48129 (patch) | |
| tree | 5b159fe9bd52169e05cdc60db5a48a5c5ac9602a /src/grp-journal-remote | |
| parent | 23708daf3ba69ba9880102b4f720a3842883332e (diff) | |
| parent | 34dbdee3b2f122d2ef903a368b172e75f962b66a (diff) | |
Merge branch 'lukeshu/postmove' into 'lukeshu/master'
Diffstat (limited to 'src/grp-journal-remote')
20 files changed, 6143 insertions, 0 deletions
diff --git a/src/grp-journal-remote/.gitignore b/src/grp-journal-remote/.gitignore new file mode 100644 index 0000000000..06847b65d4 --- /dev/null +++ b/src/grp-journal-remote/.gitignore @@ -0,0 +1,2 @@ +/journal-remote.conf +/journal-upload.conf diff --git a/src/grp-journal-remote/browse.html b/src/grp-journal-remote/browse.html new file mode 100644 index 0000000000..32848c7673 --- /dev/null +++ b/src/grp-journal-remote/browse.html @@ -0,0 +1,544 @@ +<!DOCTYPE html> +<html> +<head> + <title>Journal</title> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> + <style type="text/css"> + div#divlogs, div#diventry { + font-family: monospace; + font-size: 7pt; + background-color: #ffffff; + padding: 1em; + margin: 2em 0em; + border-radius: 10px 10px 10px 10px; + border: 1px solid threedshadow; + white-space: nowrap; + overflow-x: scroll; + } + div#diventry { + display: none; + } + div#divlogs { + display: block; + } + body { + background-color: #ededed; + color: #313739; + font: message-box; + margin: 3em; + } + td.timestamp { + text-align: right; + border-right: 1px dotted lightgrey; + padding-right: 5px; + } + td.process { + border-right: 1px dotted lightgrey; + padding-left: 5px; + padding-right: 5px; + } + td.message { + padding-left: 5px; + } + td.message > a:link, td.message > a:visited { + text-decoration: none; + color: #313739; + } + td.message-error { + padding-left: 5px; + color: red; + font-weight: bold; + } + td.message-error > a:link, td.message-error > a:visited { + text-decoration: none; + color: red; + } + td.message-highlight { + padding-left: 5px; + font-weight: bold; + } + td.message-highlight > a:link, td.message-highlight > a:visited { + text-decoration: none; + color: #313739; + } + td > a:hover, td > a:active { + text-decoration: underline; + color: #c13739; + } + table#tablelogs, table#tableentry { + border-collapse: collapse; + } + td.field { + text-align: right; + border-right: 1px dotted lightgrey; + padding-right: 5px; + } + td.data { + padding-left: 5px; + } + div#keynav { + text-align: center; + font-size: 7pt; + color: #818789; + padding-top: 2em; + } + span.key { + font-weight: bold; + color: #313739; + } + div#buttonnav { + text-align: center; + } + button { + font-size: 18pt; + font-weight: bold; + width: 2em; + height: 2em; + } + div#filternav { + text-align: center; + } + select { + width: 50em; + } + </style> +</head> + +<body> + <!-- TODO: + - live display + - show red lines for reboots --> + + <h1 id="title"></h1> + + <div id="os"></div> + <div id="virtualization"></div> + <div id="cutoff"></div> + <div id="machine"></div> + <div id="usage"></div> + <div id="showing"></div> + + <div id="filternav"> + <select id="filter" onchange="onFilterChange(this);" onfocus="onFilterFocus(this);"> + <option>No filter</option> + </select> + + <input id="boot" type="checkbox" onchange="onBootChange(this);">Only current boot</input> + </div> + + <div id="divlogs"><table id="tablelogs"></table></div> + <a name="entry"></a> + <div id="diventry"><table id="tableentry"></table></div> + + <div id="buttonnav"> + <button id="head" onclick="entriesLoadHead();" title="First Page">⇤</button> + <button id="previous" type="button" onclick="entriesLoadPrevious();" title="Previous Page"/>←</button> + <button id="next" type="button" onclick="entriesLoadNext();" title="Next Page"/>→</button> + <button id="tail" type="button" onclick="entriesLoadTail();" title="Last Page"/>⇥</button> + + <button id="more" type="button" onclick="entriesMore();" title="More Entries"/>+</button> + <button id="less" type="button" onclick="entriesLess();" title="Fewer Entries"/>-</button> + </div> + + <div id="keynav"> + <span class="key">g</span>: First Page + <span class="key">←, k, BACKSPACE</span>: Previous Page + <span class="key">→, j, SPACE</span>: Next Page + <span class="key">G</span>: Last Page + <span class="key">+</span>: More entries + <span class="key">-</span>: Fewer entries + </div> + + <script type="text/javascript"> + var first_cursor = null; + var last_cursor = null; + + function getNEntries() { + var n; + n = localStorage["n_entries"]; + if (n == null) + return 50; + n = parseInt(n); + if (n < 10) + return 10; + if (n > 1000) + return 1000; + return n; + } + + function showNEntries(n) { + var showing = document.getElementById("showing"); + showing.innerHTML = "Showing <b>" + n.toString() + "</b> entries."; + } + + function setNEntries(n) { + if (n < 10) + return 10; + if (n > 1000) + return 1000; + localStorage["n_entries"] = n.toString(); + showNEntries(n); + } + + function machineLoad() { + var request = new XMLHttpRequest(); + request.open("GET", "/machine"); + request.onreadystatechange = machineOnResult; + request.setRequestHeader("Accept", "application/json"); + request.send(null); + } + + function formatBytes(u) { + if (u >= 1024*1024*1024*1024) + return (u/1024/1024/1024/1024).toFixed(1) + " TiB"; + else if (u >= 1024*1024*1024) + return (u/1024/1024/1024).toFixed(1) + " GiB"; + else if (u >= 1024*1024) + return (u/1024/1024).toFixed(1) + " MiB"; + else if (u >= 1024) + return (u/1024).toFixed(1) + " KiB"; + else + return u.toString() + " B"; + } + + function escapeHTML(s) { + return s.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">"); + } + + function machineOnResult(event) { + if ((event.currentTarget.readyState != 4) || + (event.currentTarget.status != 200 && event.currentTarget.status != 0)) + return; + + var d = JSON.parse(event.currentTarget.responseText); + + var title = document.getElementById("title"); + title.innerHTML = 'Journal of ' + escapeHTML(d.hostname); + document.title = 'Journal of ' + escapeHTML(d.hostname); + + var machine = document.getElementById("machine"); + machine.innerHTML = 'Machine ID is <b>' + d.machine_id + '</b>, current boot ID is <b>' + d.boot_id + '</b>.'; + + var cutoff = document.getElementById("cutoff"); + var from = new Date(parseInt(d.cutoff_from_realtime) / 1000); + var to = new Date(parseInt(d.cutoff_to_realtime) / 1000); + cutoff.innerHTML = 'Journal begins at <b>' + from.toLocaleString() + '</b> and ends at <b>' + to.toLocaleString() + '</b>.'; + + var usage = document.getElementById("usage"); + usage.innerHTML = 'Disk usage is <b>' + formatBytes(parseInt(d.usage)) + '</b>.'; + + var os = document.getElementById("os"); + os.innerHTML = 'Operating system is <b>' + escapeHTML(d.os_pretty_name) + '</b>.'; + + var virtualization = document.getElementById("virtualization"); + virtualization.innerHTML = d.virtualization == "bare" ? "Running on <b>bare metal</b>." : "Running on virtualization <b>" + escapeHTML(d.virtualization) + "</b>."; + } + + function entriesLoad(range) { + + if (range == null) + range = localStorage["cursor"] + ":0"; + if (range == null) + range = ""; + + var url = "/entries"; + + if (localStorage["filter"] != "" && localStorage["filter"] != null) { + url += "?_SYSTEMD_UNIT=" + escape(localStorage["filter"]); + + if (localStorage["boot"] == "1") + url += "&boot"; + } else { + if (localStorage["boot"] == "1") + url += "?boot"; + } + + var request = new XMLHttpRequest(); + request.open("GET", url); + request.onreadystatechange = entriesOnResult; + request.setRequestHeader("Accept", "application/json"); + request.setRequestHeader("Range", "entries=" + range + ":" + getNEntries().toString()); + request.send(null); + } + + function entriesLoadNext() { + if (last_cursor == null) + entriesLoad(""); + else + entriesLoad(last_cursor + ":1"); + } + + function entriesLoadPrevious() { + if (first_cursor == null) + entriesLoad(""); + else + entriesLoad(first_cursor + ":-" + getNEntries().toString()); + } + + function entriesLoadHead() { + entriesLoad(""); + } + + function entriesLoadTail() { + entriesLoad(":-" + getNEntries().toString()); + } + + function entriesOnResult(event) { + + if ((event.currentTarget.readyState != 4) || + (event.currentTarget.status != 200 && event.currentTarget.status != 0)) + return; + + var logs = document.getElementById("tablelogs"); + + var lc = null; + var fc = null; + + var i, l = event.currentTarget.responseText.split('\n'); + + if (l.length <= 1) { + logs.innerHTML = '<tbody><tr><td colspan="3"><i>No further entries...</i></td></tr></tbody>'; + return; + } + + var buf = ''; + + for (i in l) { + + if (l[i] == '') + continue; + + var d = JSON.parse(l[i]); + if (d.MESSAGE == undefined || d.__CURSOR == undefined) + continue; + + if (fc == null) + fc = d.__CURSOR; + lc = d.__CURSOR; + + var priority; + if (d.PRIORITY != undefined) + priority = parseInt(d.PRIORITY); + else + priority = 6; + + if (priority <= 3) + clazz = "message-error"; + else if (priority <= 5) + clazz = "message-highlight"; + else + clazz = "message"; + + buf += '<tr><td class="timestamp">'; + + if (d.__REALTIME_TIMESTAMP != undefined) { + var timestamp = new Date(parseInt(d.__REALTIME_TIMESTAMP) / 1000); + buf += timestamp.toLocaleString(); + } + + buf += '</td><td class="process">'; + + if (d.SYSLOG_IDENTIFIER != undefined) + buf += escapeHTML(d.SYSLOG_IDENTIFIER); + else if (d._COMM != undefined) + buf += escapeHTML(d._COMM); + + if (d._PID != undefined) + buf += "[" + escapeHTML(d._PID) + "]"; + else if (d.SYSLOG_PID != undefined) + buf += "[" + escapeHTML(d.SYSLOG_PID) + "]"; + + buf += '</td><td class="' + clazz + '"><a href="#entry" onclick="onMessageClick(\'' + d.__CURSOR + '\');">'; + + if (d.MESSAGE == null) + buf += "[blob data]"; + else if (d.MESSAGE instanceof Array) + buf += "[" + formatBytes(d.MESSAGE.length) + " blob data]"; + else + buf += escapeHTML(d.MESSAGE); + + buf += '</a></td></tr>'; + } + + logs.innerHTML = '<tbody>' + buf + '</tbody>'; + + if (fc != null) { + first_cursor = fc; + localStorage["cursor"] = fc; + } + if (lc != null) + last_cursor = lc; + } + + function entriesMore() { + setNEntries(getNEntries() + 10); + entriesLoad(first_cursor); + } + + function entriesLess() { + setNEntries(getNEntries() - 10); + entriesLoad(first_cursor); + } + + function onResultMessageClick(event) { + if ((event.currentTarget.readyState != 4) || + (event.currentTarget.status != 200 && event.currentTarget.status != 0)) + return; + + var d = JSON.parse(event.currentTarget.responseText); + + document.getElementById("diventry").style.display = "block"; + entry = document.getElementById("tableentry"); + + var buf = ""; + for (var key in d) { + var data = d[key]; + + if (data == null) + data = "[blob data]"; + else if (data instanceof Array) + data = "[" + formatBytes(data.length) + " blob data]"; + else + data = escapeHTML(data); + + buf += '<tr><td class="field">' + key + '</td><td class="data">' + data + '</td></tr>'; + } + entry.innerHTML = '<tbody>' + buf + '</tbody>'; + } + + function onMessageClick(t) { + var request = new XMLHttpRequest(); + request.open("GET", "/entries?discrete"); + request.onreadystatechange = onResultMessageClick; + request.setRequestHeader("Accept", "application/json"); + request.setRequestHeader("Range", "entries=" + t + ":0:1"); + request.send(null); + } + + function onKeyUp(event) { + switch (event.keyCode) { + case 8: + case 37: + case 75: + entriesLoadPrevious(); + break; + case 32: + case 39: + case 74: + entriesLoadNext(); + break; + + case 71: + if (event.shiftKey) + entriesLoadTail(); + else + entriesLoadHead(); + break; + case 171: + entriesMore(); + break; + case 173: + entriesLess(); + break; + } + } + + function onMouseWheel(event) { + if (event.detail < 0 || event.wheelDelta > 0) + entriesLoadPrevious(); + else + entriesLoadNext(); + } + + function onResultFilterFocus(event) { + if ((event.currentTarget.readyState != 4) || + (event.currentTarget.status != 200 && event.currentTarget.status != 0)) + return; + + f = document.getElementById("filter"); + + var l = event.currentTarget.responseText.split('\n'); + var buf = '<option>No filter</option>'; + var j = -1; + + for (i in l) { + + if (l[i] == '') + continue; + + var d = JSON.parse(l[i]); + if (d._SYSTEMD_UNIT == undefined) + continue; + + buf += '<option value="' + escape(d._SYSTEMD_UNIT) + '">' + escapeHTML(d._SYSTEMD_UNIT) + '</option>'; + + if (d._SYSTEMD_UNIT == localStorage["filter"]) + j = i; + } + + if (j < 0) { + if (localStorage["filter"] != null && localStorage["filter"] != "") { + buf += '<option value="' + escape(localStorage["filter"]) + '">' + escapeHTML(localStorage["filter"]) + '</option>'; + j = i + 1; + } else + j = 0; + } + + f.innerHTML = buf; + f.selectedIndex = j; + } + + function onFilterFocus(w) { + var request = new XMLHttpRequest(); + request.open("GET", "/fields/_SYSTEMD_UNIT"); + request.onreadystatechange = onResultFilterFocus; + request.setRequestHeader("Accept", "application/json"); + request.send(null); + } + + function onFilterChange(w) { + if (w.selectedIndex <= 0) + localStorage["filter"] = ""; + else + localStorage["filter"] = unescape(w.options[w.selectedIndex].value); + + entriesLoadHead(); + } + + function onBootChange(w) { + localStorage["boot"] = w.checked ? "1" : "0"; + entriesLoadHead(); + } + + function initFilter() { + f = document.getElementById("filter"); + + var buf = '<option>No filter</option>'; + + var filter = localStorage["filter"]; + if (filter != null && filter != "") { + buf += '<option value="' + escape(filter) + '">' + escapeHTML(filter) + '</option>'; + j = 1; + } else + j = 0; + + f.innerHTML = buf; + f.selectedIndex = j; + } + + function installHandlers() { + document.onkeyup = onKeyUp; + + logs = document.getElementById("divlogs"); + logs.addEventListener("mousewheel", onMouseWheel, false); + logs.addEventListener("DOMMouseScroll", onMouseWheel, false); + } + + machineLoad(); + entriesLoad(null); + showNEntries(getNEntries()); + initFilter(); + installHandlers(); + </script> +</body> +</html> diff --git a/src/grp-journal-remote/log-generator.py b/src/grp-journal-remote/log-generator.py new file mode 100755 index 0000000000..fd6964e758 --- /dev/null +++ b/src/grp-journal-remote/log-generator.py @@ -0,0 +1,76 @@ +#!/usr/bin/python +from __future__ import print_function +import sys +import argparse + +PARSER = argparse.ArgumentParser() +PARSER.add_argument('n', type=int) +PARSER.add_argument('--dots', action='store_true') +PARSER.add_argument('--data-size', type=int, default=4000) +PARSER.add_argument('--data-type', choices={'random', 'simple'}) +OPTIONS = PARSER.parse_args() + +template = """\ +__CURSOR=s=6863c726210b4560b7048889d8ada5c5;i=3e931;b=f446871715504074bf7049ef0718fa93;m={m:x};t=4fd05c +__REALTIME_TIMESTAMP={realtime_ts} +__MONOTONIC_TIMESTAMP={monotonic_ts} +_BOOT_ID=f446871715504074bf7049ef0718fa93 +_TRANSPORT=syslog +PRIORITY={priority} +SYSLOG_FACILITY={facility} +SYSLOG_IDENTIFIER=/USR/SBIN/CRON +MESSAGE={message} +_UID=0 +_GID=0 +_MACHINE_ID=69121ca41d12c1b69a7960174c27b618 +_HOSTNAME=hostname +SYSLOG_PID=25721 +_PID=25721 +_SOURCE_REALTIME_TIMESTAMP={source_realtime_ts} +DATA={data} +""" + +m = 0x198603b12d7 +realtime_ts = 1404101101501873 +monotonic_ts = 1753961140951 +source_realtime_ts = 1404101101483516 +priority = 3 +facility = 6 + +src = open('/dev/urandom', 'rb') + +bytes = 0 +counter = 0 + +for i in range(OPTIONS.n): + message = repr(src.read(2000)) + if OPTIONS.data_type == 'random': + data = repr(src.read(OPTIONS.data_size)) + else: + # keep the pattern non-repeating so we get a different blob every time + data = '{:0{}}'.format(counter, OPTIONS.data_size) + counter += 1 + + entry = template.format(m=m, + realtime_ts=realtime_ts, + monotonic_ts=monotonic_ts, + source_realtime_ts=source_realtime_ts, + priority=priority, + facility=facility, + message=message, + data=data) + m += 1 + realtime_ts += 1 + monotonic_ts += 1 + source_realtime_ts += 1 + + bytes += len(entry) + + print(entry) + + if OPTIONS.dots: + print('.', file=sys.stderr, end='', flush=True) + +if OPTIONS.dots: + print(file=sys.stderr) +print('Wrote {} bytes'.format(bytes), file=sys.stderr) diff --git a/src/grp-journal-remote/microhttpd-util.c b/src/grp-journal-remote/microhttpd-util.c new file mode 100644 index 0000000000..c65c43186f --- /dev/null +++ b/src/grp-journal-remote/microhttpd-util.c @@ -0,0 +1,327 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + Copyright 2012 Zbigniew JÄ™drzejewski-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 <stddef.h> +#include <stdio.h> +#include <string.h> + +#ifdef HAVE_GNUTLS +#include <gnutls/gnutls.h> +#include <gnutls/x509.h> +#endif + +#include "alloc-util.h" +#include "log.h" +#include "macro.h" +#include "microhttpd-util.h" +#include "string-util.h" +#include "strv.h" +#include "util.h" + +void microhttpd_logger(void *arg, const char *fmt, va_list ap) { + char *f; + + f = strjoina("microhttpd: ", fmt); + + DISABLE_WARNING_FORMAT_NONLITERAL; + log_internalv(LOG_INFO, 0, NULL, 0, NULL, f, ap); + REENABLE_WARNING; +} + + +static int mhd_respond_internal(struct MHD_Connection *connection, + enum MHD_RequestTerminationCode code, + char *buffer, + size_t size, + enum MHD_ResponseMemoryMode mode) { + struct MHD_Response *response; + int r; + + assert(connection); + + response = MHD_create_response_from_buffer(size, buffer, mode); + if (!response) + return MHD_NO; + + log_debug("Queing response %u: %s", code, buffer); + MHD_add_response_header(response, "Content-Type", "text/plain"); + r = MHD_queue_response(connection, code, response); + MHD_destroy_response(response); + + return r; +} + +int mhd_respond(struct MHD_Connection *connection, + enum MHD_RequestTerminationCode code, + const char *message) { + + return mhd_respond_internal(connection, code, + (char*) message, strlen(message), + MHD_RESPMEM_PERSISTENT); +} + +int mhd_respond_oom(struct MHD_Connection *connection) { + return mhd_respond(connection, MHD_HTTP_SERVICE_UNAVAILABLE, "Out of memory.\n"); +} + +int mhd_respondf(struct MHD_Connection *connection, + enum MHD_RequestTerminationCode code, + const char *format, ...) { + + char *m; + int r; + va_list ap; + + assert(connection); + assert(format); + + va_start(ap, format); + r = vasprintf(&m, format, ap); + va_end(ap); + + if (r < 0) + return respond_oom(connection); + + return mhd_respond_internal(connection, code, m, r, MHD_RESPMEM_MUST_FREE); +} + +#ifdef HAVE_GNUTLS + +static struct { + const char *const names[4]; + int level; + bool enabled; +} gnutls_log_map[] = { + { {"0"}, LOG_DEBUG }, + { {"1", "audit"}, LOG_WARNING, true}, /* gnutls session audit */ + { {"2", "assert"}, LOG_DEBUG }, /* gnutls assert log */ + { {"3", "hsk", "ext"}, LOG_DEBUG }, /* gnutls handshake log */ + { {"4", "rec"}, LOG_DEBUG }, /* gnutls record log */ + { {"5", "dtls"}, LOG_DEBUG }, /* gnutls DTLS log */ + { {"6", "buf"}, LOG_DEBUG }, + { {"7", "write", "read"}, LOG_DEBUG }, + { {"8"}, LOG_DEBUG }, + { {"9", "enc", "int"}, LOG_DEBUG }, +}; + +static void log_func_gnutls(int level, const char *message) { + assert_se(message); + + if (0 <= level && level < (int) ELEMENTSOF(gnutls_log_map)) { + if (gnutls_log_map[level].enabled) + log_internal(gnutls_log_map[level].level, 0, NULL, 0, NULL, "gnutls %d/%s: %s", level, gnutls_log_map[level].names[1], message); + } else { + log_debug("Received GNUTLS message with unknown level %d.", level); + log_internal(LOG_DEBUG, 0, NULL, 0, NULL, "gnutls: %s", message); + } +} + +static void log_reset_gnutls_level(void) { + int i; + + for (i = ELEMENTSOF(gnutls_log_map) - 1; i >= 0; i--) + if (gnutls_log_map[i].enabled) { + log_debug("Setting gnutls log level to %d", i); + gnutls_global_set_log_level(i); + break; + } +} + +static int log_enable_gnutls_category(const char *cat) { + unsigned i; + + if (streq(cat, "all")) { + for (i = 0; i < ELEMENTSOF(gnutls_log_map); i++) + gnutls_log_map[i].enabled = true; + log_reset_gnutls_level(); + return 0; + } else + for (i = 0; i < ELEMENTSOF(gnutls_log_map); i++) + if (strv_contains((char**)gnutls_log_map[i].names, cat)) { + gnutls_log_map[i].enabled = true; + log_reset_gnutls_level(); + return 0; + } + log_error("No such log category: %s", cat); + return -EINVAL; +} + +int setup_gnutls_logger(char **categories) { + char **cat; + int r; + + gnutls_global_set_log_function(log_func_gnutls); + + if (categories) { + STRV_FOREACH(cat, categories) { + r = log_enable_gnutls_category(*cat); + if (r < 0) + return r; + } + } else + log_reset_gnutls_level(); + + return 0; +} + +static int verify_cert_authorized(gnutls_session_t session) { + unsigned status; + gnutls_certificate_type_t type; + gnutls_datum_t out; + int r; + + r = gnutls_certificate_verify_peers2(session, &status); + if (r < 0) + return log_error_errno(r, "gnutls_certificate_verify_peers2 failed: %m"); + + type = gnutls_certificate_type_get(session); + r = gnutls_certificate_verification_status_print(status, type, &out, 0); + if (r < 0) + return log_error_errno(r, "gnutls_certificate_verification_status_print failed: %m"); + + log_debug("Certificate status: %s", out.data); + gnutls_free(out.data); + + return status == 0 ? 0 : -EPERM; +} + +static int get_client_cert(gnutls_session_t session, gnutls_x509_crt_t *client_cert) { + const gnutls_datum_t *pcert; + unsigned listsize; + gnutls_x509_crt_t cert; + int r; + + assert(session); + assert(client_cert); + + pcert = gnutls_certificate_get_peers(session, &listsize); + if (!pcert || !listsize) { + log_error("Failed to retrieve certificate chain"); + return -EINVAL; + } + + r = gnutls_x509_crt_init(&cert); + if (r < 0) { + log_error("Failed to initialize client certificate"); + return r; + } + + /* Note that by passing values between 0 and listsize here, you + can get access to the CA's certs */ + r = gnutls_x509_crt_import(cert, &pcert[0], GNUTLS_X509_FMT_DER); + if (r < 0) { + log_error("Failed to import client certificate"); + gnutls_x509_crt_deinit(cert); + return r; + } + + *client_cert = cert; + return 0; +} + +static int get_auth_dn(gnutls_x509_crt_t client_cert, char **buf) { + size_t len = 0; + int r; + + assert(buf); + assert(*buf == NULL); + + r = gnutls_x509_crt_get_dn(client_cert, NULL, &len); + if (r != GNUTLS_E_SHORT_MEMORY_BUFFER) { + log_error("gnutls_x509_crt_get_dn failed"); + return r; + } + + *buf = malloc(len); + if (!*buf) + return log_oom(); + + gnutls_x509_crt_get_dn(client_cert, *buf, &len); + return 0; +} + +static inline void gnutls_x509_crt_deinitp(gnutls_x509_crt_t *p) { + gnutls_x509_crt_deinit(*p); +} + +int check_permissions(struct MHD_Connection *connection, int *code, char **hostname) { + const union MHD_ConnectionInfo *ci; + gnutls_session_t session; + _cleanup_(gnutls_x509_crt_deinitp) gnutls_x509_crt_t client_cert = NULL; + _cleanup_free_ char *buf = NULL; + int r; + + assert(connection); + assert(code); + + *code = 0; + + ci = MHD_get_connection_info(connection, + MHD_CONNECTION_INFO_GNUTLS_SESSION); + if (!ci) { + log_error("MHD_get_connection_info failed: session is unencrypted"); + *code = mhd_respond(connection, MHD_HTTP_FORBIDDEN, + "Encrypted connection is required"); + return -EPERM; + } + session = ci->tls_session; + assert(session); + + r = get_client_cert(session, &client_cert); + if (r < 0) { + *code = mhd_respond(connection, MHD_HTTP_UNAUTHORIZED, + "Authorization through certificate is required"); + return -EPERM; + } + + r = get_auth_dn(client_cert, &buf); + if (r < 0) { + *code = mhd_respond(connection, MHD_HTTP_UNAUTHORIZED, + "Failed to determine distinguished name from certificate"); + return -EPERM; + } + + log_debug("Connection from %s", buf); + + if (hostname) { + *hostname = buf; + buf = NULL; + } + + r = verify_cert_authorized(session); + if (r < 0) { + log_warning("Client is not authorized"); + *code = mhd_respond(connection, MHD_HTTP_UNAUTHORIZED, + "Client certificate not signed by recognized authority"); + } + return r; +} + +#else +int check_permissions(struct MHD_Connection *connection, int *code, char **hostname) { + return -EPERM; +} + +int setup_gnutls_logger(char **categories) { + if (categories) + log_notice("Ignoring specified gnutls logging categories — gnutls not available."); + return 0; +} +#endif diff --git a/src/grp-journal-remote/microhttpd-util.h b/src/grp-journal-remote/microhttpd-util.h new file mode 100644 index 0000000000..ea160f212b --- /dev/null +++ b/src/grp-journal-remote/microhttpd-util.h @@ -0,0 +1,60 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew JÄ™drzejewski-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 <microhttpd.h> +#include <stdarg.h> + +#include "macro.h" + +/* Compatiblity with libmicrohttpd < 0.9.38 */ +#ifndef MHD_HTTP_NOT_ACCEPTABLE +#define MHD_HTTP_NOT_ACCEPTABLE MHD_HTTP_METHOD_NOT_ACCEPTABLE +#endif + +#if MHD_VERSION < 0x00094203 +#define MHD_create_response_from_fd_at_offset64 MHD_create_response_from_fd_at_offset +#endif + +void microhttpd_logger(void *arg, const char *fmt, va_list ap) _printf_(2, 0); + +/* respond_oom() must be usable with return, hence this form. */ +#define respond_oom(connection) log_oom(), mhd_respond_oom(connection) + +int mhd_respondf(struct MHD_Connection *connection, + unsigned code, + const char *format, ...) _printf_(3,4); + +int mhd_respond(struct MHD_Connection *connection, + unsigned code, + const char *message); + +int mhd_respond_oom(struct MHD_Connection *connection); + +int check_permissions(struct MHD_Connection *connection, int *code, char **hostname); + +/* Set gnutls internal logging function to a callback which uses our + * own logging framework. + * + * gnutls categories are additionally filtered by our internal log + * level, so it should be set fairly high to capture all potentially + * interesting events without overwhelming detail. + */ +int setup_gnutls_logger(char **categories); diff --git a/src/grp-journal-remote/systemd-journal-gatewayd/Makefile b/src/grp-journal-remote/systemd-journal-gatewayd/Makefile new file mode 100644 index 0000000000..ed1dfbf301 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-gatewayd/Makefile @@ -0,0 +1,68 @@ +# -*- 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 JÄ™drzejewski-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),) +gatewayddocumentrootdir=$(pkgdatadir)/gatewayd + +libexec_PROGRAMS += \ + systemd-journal-gatewayd + +systemd_journal_gatewayd_SOURCES = \ + src/journal-remote/journal-gatewayd.c \ + src/journal-remote/microhttpd-util.h \ + src/journal-remote/microhttpd-util.c + +systemd_journal_gatewayd_LDADD = \ + libshared.la \ + $(MICROHTTPD_LIBS) + +ifneq ($(HAVE_GNUTLS),) +systemd_journal_gatewayd_LDADD += \ + $(GNUTLS_LIBS) +endif # HAVE_GNUTLS + +systemd_journal_gatewayd_CFLAGS = \ + $(AM_CFLAGS) \ + $(MICROHTTPD_CFLAGS) + +systemd_journal_gatewayd_CPPFLAGS = \ + $(AM_CPPFLAGS) \ + -DDOCUMENT_ROOT=\"$(gatewayddocumentrootdir)\" + +dist_systemunit_DATA += \ + units/systemd-journal-gatewayd.socket + +nodist_systemunit_DATA += \ + units/systemd-journal-gatewayd.service + +dist_gatewayddocumentroot_DATA = \ + src/journal-remote/browse.html + +endif # HAVE_MICROHTTPD + +EXTRA_DIST += \ + units/systemd-journal-gatewayd.service.in + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-journal-remote/systemd-journal-gatewayd/journal-gatewayd.c b/src/grp-journal-remote/systemd-journal-gatewayd/journal-gatewayd.c new file mode 100644 index 0000000000..1cfb5e2c9c --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-gatewayd/journal-gatewayd.c @@ -0,0 +1,1077 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + 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 <fcntl.h> +#include <getopt.h> +#ifdef HAVE_GNUTLS +#include <gnutls/gnutls.h> +#endif +#include <microhttpd.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <systemd/sd-bus.h> +#include <systemd/sd-daemon.h> +#include <systemd/sd-journal.h> + +#include "alloc-util.h" +#include "bus-util.h" +#include "fd-util.h" +#include "fileio.h" +#include "hostname-util.h" +#include "log.h" +#include "logs-show.h" +#include "microhttpd-util.h" +#include "parse-util.h" +#include "sigbus.h" +#include "util.h" + +#define JOURNAL_WAIT_TIMEOUT (10*USEC_PER_SEC) + +static char *arg_key_pem = NULL; +static char *arg_cert_pem = NULL; +static char *arg_trust_pem = NULL; + +typedef struct RequestMeta { + sd_journal *journal; + + OutputMode mode; + + char *cursor; + int64_t n_skip; + uint64_t n_entries; + bool n_entries_set; + + FILE *tmp; + uint64_t delta, size; + + int argument_parse_error; + + bool follow; + bool discrete; + + uint64_t n_fields; + bool n_fields_set; +} RequestMeta; + +static const char* const mime_types[_OUTPUT_MODE_MAX] = { + [OUTPUT_SHORT] = "text/plain", + [OUTPUT_JSON] = "application/json", + [OUTPUT_JSON_SSE] = "text/event-stream", + [OUTPUT_EXPORT] = "application/vnd.fdo.journal", +}; + +static RequestMeta *request_meta(void **connection_cls) { + RequestMeta *m; + + assert(connection_cls); + if (*connection_cls) + return *connection_cls; + + m = new0(RequestMeta, 1); + if (!m) + return NULL; + + *connection_cls = m; + return m; +} + +static void request_meta_free( + void *cls, + struct MHD_Connection *connection, + void **connection_cls, + enum MHD_RequestTerminationCode toe) { + + RequestMeta *m = *connection_cls; + + if (!m) + return; + + sd_journal_close(m->journal); + + safe_fclose(m->tmp); + + free(m->cursor); + free(m); +} + +static int open_journal(RequestMeta *m) { + assert(m); + + if (m->journal) + return 0; + + return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); +} + +static int request_meta_ensure_tmp(RequestMeta *m) { + assert(m); + + if (m->tmp) + rewind(m->tmp); + else { + int fd; + + fd = open_tmpfile_unlinkable("/tmp", O_RDWR|O_CLOEXEC); + if (fd < 0) + return fd; + + m->tmp = fdopen(fd, "w+"); + if (!m->tmp) { + safe_close(fd); + return -errno; + } + } + + return 0; +} + +static ssize_t request_reader_entries( + void *cls, + uint64_t pos, + char *buf, + size_t max) { + + RequestMeta *m = cls; + int r; + size_t n, k; + + assert(m); + assert(buf); + assert(max > 0); + assert(pos >= m->delta); + + pos -= m->delta; + + while (pos >= m->size) { + off_t sz; + + /* End of this entry, so let's serialize the next + * one */ + + if (m->n_entries_set && + m->n_entries <= 0) + return MHD_CONTENT_READER_END_OF_STREAM; + + if (m->n_skip < 0) + r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); + else if (m->n_skip > 0) + r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); + else + r = sd_journal_next(m->journal); + + if (r < 0) { + log_error_errno(r, "Failed to advance journal pointer: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } else if (r == 0) { + + if (m->follow) { + r = sd_journal_wait(m->journal, (uint64_t) JOURNAL_WAIT_TIMEOUT); + if (r < 0) { + log_error_errno(r, "Couldn't wait for journal event: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + if (r == SD_JOURNAL_NOP) + break; + + continue; + } + + return MHD_CONTENT_READER_END_OF_STREAM; + } + + if (m->discrete) { + assert(m->cursor); + + r = sd_journal_test_cursor(m->journal, m->cursor); + if (r < 0) { + log_error_errno(r, "Failed to test cursor: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + if (r == 0) + return MHD_CONTENT_READER_END_OF_STREAM; + } + + pos -= m->size; + m->delta += m->size; + + if (m->n_entries_set) + m->n_entries -= 1; + + m->n_skip = 0; + + r = request_meta_ensure_tmp(m); + if (r < 0) { + log_error_errno(r, "Failed to create temporary file: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL); + if (r < 0) { + log_error_errno(r, "Failed to serialize item: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + sz = ftello(m->tmp); + if (sz == (off_t) -1) { + log_error_errno(errno, "Failed to retrieve file position: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + m->size = (uint64_t) sz; + } + + if (fseeko(m->tmp, pos, SEEK_SET) < 0) { + log_error_errno(errno, "Failed to seek to position: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + n = m->size - pos; + if (n < 1) + return 0; + if (n > max) + n = max; + + errno = 0; + k = fread(buf, 1, n, m->tmp); + if (k != n) { + log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + return (ssize_t) k; +} + +static int request_parse_accept( + RequestMeta *m, + struct MHD_Connection *connection) { + + const char *header; + + assert(m); + assert(connection); + + header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); + if (!header) + return 0; + + if (streq(header, mime_types[OUTPUT_JSON])) + m->mode = OUTPUT_JSON; + else if (streq(header, mime_types[OUTPUT_JSON_SSE])) + m->mode = OUTPUT_JSON_SSE; + else if (streq(header, mime_types[OUTPUT_EXPORT])) + m->mode = OUTPUT_EXPORT; + else + m->mode = OUTPUT_SHORT; + + return 0; +} + +static int request_parse_range( + RequestMeta *m, + struct MHD_Connection *connection) { + + const char *range, *colon, *colon2; + int r; + + assert(m); + assert(connection); + + range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); + if (!range) + return 0; + + if (!startswith(range, "entries=")) + return 0; + + range += 8; + range += strspn(range, WHITESPACE); + + colon = strchr(range, ':'); + if (!colon) + m->cursor = strdup(range); + else { + const char *p; + + colon2 = strchr(colon + 1, ':'); + if (colon2) { + _cleanup_free_ char *t; + + t = strndup(colon + 1, colon2 - colon - 1); + if (!t) + return -ENOMEM; + + r = safe_atoi64(t, &m->n_skip); + if (r < 0) + return r; + } + + p = (colon2 ? colon2 : colon) + 1; + if (*p) { + r = safe_atou64(p, &m->n_entries); + if (r < 0) + return r; + + if (m->n_entries <= 0) + return -EINVAL; + + m->n_entries_set = true; + } + + m->cursor = strndup(range, colon - range); + } + + if (!m->cursor) + return -ENOMEM; + + m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; + if (isempty(m->cursor)) + m->cursor = mfree(m->cursor); + + return 0; +} + +static int request_parse_arguments_iterator( + void *cls, + enum MHD_ValueKind kind, + const char *key, + const char *value) { + + RequestMeta *m = cls; + _cleanup_free_ char *p = NULL; + int r; + + assert(m); + + if (isempty(key)) { + m->argument_parse_error = -EINVAL; + return MHD_NO; + } + + if (streq(key, "follow")) { + if (isempty(value)) { + m->follow = true; + return MHD_YES; + } + + r = parse_boolean(value); + if (r < 0) { + m->argument_parse_error = r; + return MHD_NO; + } + + m->follow = r; + return MHD_YES; + } + + if (streq(key, "discrete")) { + if (isempty(value)) { + m->discrete = true; + return MHD_YES; + } + + r = parse_boolean(value); + if (r < 0) { + m->argument_parse_error = r; + return MHD_NO; + } + + m->discrete = r; + return MHD_YES; + } + + if (streq(key, "boot")) { + if (isempty(value)) + r = true; + else { + r = parse_boolean(value); + if (r < 0) { + m->argument_parse_error = r; + return MHD_NO; + } + } + + if (r) { + char match[9 + 32 + 1] = "_BOOT_ID="; + sd_id128_t bid; + + r = sd_id128_get_boot(&bid); + if (r < 0) { + log_error_errno(r, "Failed to get boot ID: %m"); + return MHD_NO; + } + + sd_id128_to_string(bid, match + 9); + r = sd_journal_add_match(m->journal, match, sizeof(match)-1); + if (r < 0) { + m->argument_parse_error = r; + return MHD_NO; + } + } + + return MHD_YES; + } + + p = strjoin(key, "=", strempty(value), NULL); + if (!p) { + m->argument_parse_error = log_oom(); + return MHD_NO; + } + + r = sd_journal_add_match(m->journal, p, 0); + if (r < 0) { + m->argument_parse_error = r; + return MHD_NO; + } + + return MHD_YES; +} + +static int request_parse_arguments( + RequestMeta *m, + struct MHD_Connection *connection) { + + assert(m); + assert(connection); + + m->argument_parse_error = 0; + MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); + + return m->argument_parse_error; +} + +static int request_handler_entries( + struct MHD_Connection *connection, + void *connection_cls) { + + struct MHD_Response *response; + RequestMeta *m = connection_cls; + int r; + + assert(connection); + assert(m); + + r = open_journal(m); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); + + if (request_parse_accept(m, connection) < 0) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); + + if (request_parse_range(m, connection) < 0) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header.\n"); + + if (request_parse_arguments(m, connection) < 0) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments.\n"); + + if (m->discrete) { + if (!m->cursor) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification.\n"); + + m->n_entries = 1; + m->n_entries_set = true; + } + + if (m->cursor) + r = sd_journal_seek_cursor(m->journal, m->cursor); + else if (m->n_skip >= 0) + r = sd_journal_seek_head(m->journal); + else if (m->n_skip < 0) + r = sd_journal_seek_tail(m->journal); + if (r < 0) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal.\n"); + + response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); + if (!response) + return respond_oom(connection); + + MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); + + r = MHD_queue_response(connection, MHD_HTTP_OK, response); + MHD_destroy_response(response); + + return r; +} + +static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { + const char *eq; + size_t j; + + eq = memchr(d, '=', l); + if (!eq) + return -EINVAL; + + j = l - (eq - d + 1); + + if (m == OUTPUT_JSON) { + fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); + json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); + fputs(" }\n", f); + } else { + fwrite(eq+1, 1, j, f); + fputc('\n', f); + } + + return 0; +} + +static ssize_t request_reader_fields( + void *cls, + uint64_t pos, + char *buf, + size_t max) { + + RequestMeta *m = cls; + int r; + size_t n, k; + + assert(m); + assert(buf); + assert(max > 0); + assert(pos >= m->delta); + + pos -= m->delta; + + while (pos >= m->size) { + off_t sz; + const void *d; + size_t l; + + /* End of this field, so let's serialize the next + * one */ + + if (m->n_fields_set && + m->n_fields <= 0) + return MHD_CONTENT_READER_END_OF_STREAM; + + r = sd_journal_enumerate_unique(m->journal, &d, &l); + if (r < 0) { + log_error_errno(r, "Failed to advance field index: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } else if (r == 0) + return MHD_CONTENT_READER_END_OF_STREAM; + + pos -= m->size; + m->delta += m->size; + + if (m->n_fields_set) + m->n_fields -= 1; + + r = request_meta_ensure_tmp(m); + if (r < 0) { + log_error_errno(r, "Failed to create temporary file: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + r = output_field(m->tmp, m->mode, d, l); + if (r < 0) { + log_error_errno(r, "Failed to serialize item: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + sz = ftello(m->tmp); + if (sz == (off_t) -1) { + log_error_errno(errno, "Failed to retrieve file position: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + m->size = (uint64_t) sz; + } + + if (fseeko(m->tmp, pos, SEEK_SET) < 0) { + log_error_errno(errno, "Failed to seek to position: %m"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + n = m->size - pos; + if (n > max) + n = max; + + errno = 0; + k = fread(buf, 1, n, m->tmp); + if (k != n) { + log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); + return MHD_CONTENT_READER_END_WITH_ERROR; + } + + return (ssize_t) k; +} + +static int request_handler_fields( + struct MHD_Connection *connection, + const char *field, + void *connection_cls) { + + struct MHD_Response *response; + RequestMeta *m = connection_cls; + int r; + + assert(connection); + assert(m); + + r = open_journal(m); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); + + if (request_parse_accept(m, connection) < 0) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); + + r = sd_journal_query_unique(m->journal, field); + if (r < 0) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields.\n"); + + response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); + if (!response) + return respond_oom(connection); + + MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); + + r = MHD_queue_response(connection, MHD_HTTP_OK, response); + MHD_destroy_response(response); + + return r; +} + +static int request_handler_redirect( + struct MHD_Connection *connection, + const char *target) { + + char *page; + struct MHD_Response *response; + int ret; + + assert(connection); + assert(target); + + if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) + return respond_oom(connection); + + response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); + if (!response) { + free(page); + return respond_oom(connection); + } + + MHD_add_response_header(response, "Content-Type", "text/html"); + MHD_add_response_header(response, "Location", target); + + ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); + MHD_destroy_response(response); + + return ret; +} + +static int request_handler_file( + struct MHD_Connection *connection, + const char *path, + const char *mime_type) { + + struct MHD_Response *response; + int ret; + _cleanup_close_ int fd = -1; + struct stat st; + + assert(connection); + assert(path); + assert(mime_type); + + fd = open(path, O_RDONLY|O_CLOEXEC); + if (fd < 0) + return mhd_respondf(connection, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m\n", path); + + if (fstat(fd, &st) < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m\n"); + + response = MHD_create_response_from_fd_at_offset64(st.st_size, fd, 0); + if (!response) + return respond_oom(connection); + + fd = -1; + + MHD_add_response_header(response, "Content-Type", mime_type); + + ret = MHD_queue_response(connection, MHD_HTTP_OK, response); + MHD_destroy_response(response); + + return ret; +} + +static int get_virtualization(char **v) { + _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL; + char *b = NULL; + int r; + + r = sd_bus_default_system(&bus); + if (r < 0) + return r; + + r = sd_bus_get_property_string( + bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "Virtualization", + NULL, + &b); + if (r < 0) + return r; + + if (isempty(b)) { + free(b); + *v = NULL; + return 0; + } + + *v = b; + return 1; +} + +static int request_handler_machine( + struct MHD_Connection *connection, + void *connection_cls) { + + struct MHD_Response *response; + RequestMeta *m = connection_cls; + int r; + _cleanup_free_ char* hostname = NULL, *os_name = NULL; + uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0; + char *json; + sd_id128_t mid, bid; + _cleanup_free_ char *v = NULL; + + assert(connection); + assert(m); + + r = open_journal(m); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); + + r = sd_id128_get_machine(&mid); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %s\n", strerror(-r)); + + r = sd_id128_get_boot(&bid); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %s\n", strerror(-r)); + + hostname = gethostname_malloc(); + if (!hostname) + return respond_oom(connection); + + r = sd_journal_get_usage(m->journal, &usage); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); + + r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); + if (r < 0) + return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); + + if (parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL) == -ENOENT) + (void) parse_env_file("/usr/lib/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL); + + get_virtualization(&v); + + r = asprintf(&json, + "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," + "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," + "\"hostname\" : \"%s\"," + "\"os_pretty_name\" : \"%s\"," + "\"virtualization\" : \"%s\"," + "\"usage\" : \"%"PRIu64"\"," + "\"cutoff_from_realtime\" : \"%"PRIu64"\"," + "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", + SD_ID128_FORMAT_VAL(mid), + SD_ID128_FORMAT_VAL(bid), + hostname_cleanup(hostname), + os_name ? os_name : "GNU/Linux", + v ? v : "bare", + usage, + cutoff_from, + cutoff_to); + + if (r < 0) + return respond_oom(connection); + + response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); + if (!response) { + free(json); + return respond_oom(connection); + } + + MHD_add_response_header(response, "Content-Type", "application/json"); + r = MHD_queue_response(connection, MHD_HTTP_OK, response); + MHD_destroy_response(response); + + return r; +} + +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) { + int r, code; + + assert(connection); + assert(connection_cls); + assert(url); + assert(method); + + if (!streq(method, "GET")) + return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, + "Unsupported method.\n"); + + + if (!*connection_cls) { + if (!request_meta(connection_cls)) + return respond_oom(connection); + return MHD_YES; + } + + if (arg_trust_pem) { + r = check_permissions(connection, &code, NULL); + if (r < 0) + return code; + } + + if (streq(url, "/")) + return request_handler_redirect(connection, "/browse"); + + if (streq(url, "/entries")) + return request_handler_entries(connection, *connection_cls); + + if (startswith(url, "/fields/")) + return request_handler_fields(connection, url + 8, *connection_cls); + + if (streq(url, "/browse")) + return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); + + if (streq(url, "/machine")) + return request_handler_machine(connection, *connection_cls); + + return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found.\n"); +} + +static void help(void) { + printf("%s [OPTIONS...] ...\n\n" + "HTTP server for journal events.\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --cert=CERT.PEM Server certificate in PEM format\n" + " --key=KEY.PEM Server key in PEM format\n" + " --trust=CERT.PEM Certificat authority certificate in PEM format\n", + program_invocation_short_name); +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + ARG_KEY, + ARG_CERT, + ARG_TRUST, + }; + + int r, c; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "key", required_argument, NULL, ARG_KEY }, + { "cert", required_argument, NULL, ARG_CERT }, + { "trust", required_argument, NULL, ARG_TRUST }, + {} + }; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) + + switch(c) { + + case 'h': + help(); + return 0; + + case ARG_VERSION: + return version(); + + case ARG_KEY: + if (arg_key_pem) { + log_error("Key file specified twice"); + return -EINVAL; + } + r = read_full_file(optarg, &arg_key_pem, NULL); + if (r < 0) + return log_error_errno(r, "Failed to read key file: %m"); + assert(arg_key_pem); + break; + + case ARG_CERT: + if (arg_cert_pem) { + log_error("Certificate file specified twice"); + return -EINVAL; + } + r = read_full_file(optarg, &arg_cert_pem, NULL); + if (r < 0) + return log_error_errno(r, "Failed to read certificate file: %m"); + assert(arg_cert_pem); + break; + + case ARG_TRUST: +#ifdef HAVE_GNUTLS + if (arg_trust_pem) { + log_error("CA certificate file specified twice"); + return -EINVAL; + } + r = read_full_file(optarg, &arg_trust_pem, NULL); + if (r < 0) + return log_error_errno(r, "Failed to read CA certificate file: %m"); + assert(arg_trust_pem); + break; +#else + log_error("Option --trust is not available."); +#endif + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + if (optind < argc) { + log_error("This program does not take arguments."); + return -EINVAL; + } + + if (!!arg_key_pem != !!arg_cert_pem) { + log_error("Certificate and key files must be specified together"); + return -EINVAL; + } + + if (arg_trust_pem && !arg_key_pem) { + log_error("CA certificate can only be used with certificate file"); + return -EINVAL; + } + + return 1; +} + +int main(int argc, char *argv[]) { + struct MHD_Daemon *d = NULL; + int r, n; + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r < 0) + return EXIT_FAILURE; + if (r == 0) + return EXIT_SUCCESS; + + sigbus_install(); + + r = setup_gnutls_logger(NULL); + if (r < 0) + return EXIT_FAILURE; + + n = sd_listen_fds(1); + if (n < 0) { + log_error_errno(n, "Failed to determine passed sockets: %m"); + goto finish; + } else if (n > 1) { + log_error("Can't listen on more than one socket."); + goto finish; + } else { + struct MHD_OptionItem opts[] = { + { MHD_OPTION_NOTIFY_COMPLETED, + (intptr_t) request_meta_free, NULL }, + { MHD_OPTION_EXTERNAL_LOGGER, + (intptr_t) microhttpd_logger, NULL }, + { MHD_OPTION_END, 0, NULL }, + { MHD_OPTION_END, 0, NULL }, + { MHD_OPTION_END, 0, NULL }, + { MHD_OPTION_END, 0, NULL }, + { MHD_OPTION_END, 0, NULL }}; + int opts_pos = 2; + + /* We force MHD_USE_PIPE_FOR_SHUTDOWN here, in order + * to make sure libmicrohttpd doesn't use shutdown() + * on our listening socket, which would break socket + * re-activation. See + * + * https://lists.gnu.org/archive/html/libmicrohttpd/2015-09/msg00014.html + * https://github.com/systemd/systemd/pull/1286 + */ + + int flags = + MHD_USE_DEBUG | + MHD_USE_DUAL_STACK | + MHD_USE_PIPE_FOR_SHUTDOWN | + MHD_USE_POLL | + MHD_USE_THREAD_PER_CONNECTION; + + if (n > 0) + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; + if (arg_key_pem) { + assert(arg_cert_pem); + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_KEY, 0, arg_key_pem}; + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_CERT, 0, arg_cert_pem}; + flags |= MHD_USE_SSL; + } + if (arg_trust_pem) { + assert(flags & MHD_USE_SSL); + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_TRUST, 0, arg_trust_pem}; + } + + d = MHD_start_daemon(flags, 19531, + NULL, NULL, + request_handler, NULL, + MHD_OPTION_ARRAY, opts, + MHD_OPTION_END); + } + + if (!d) { + log_error("Failed to start daemon!"); + goto finish; + } + + pause(); + + r = EXIT_SUCCESS; + +finish: + if (d) + MHD_stop_daemon(d); + + return r; +} diff --git a/src/grp-journal-remote/systemd-journal-remote/Makefile b/src/grp-journal-remote/systemd-journal-remote/Makefile new file mode 100644 index 0000000000..5e730f9fa6 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/Makefile @@ -0,0 +1,85 @@ +# -*- 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 JÄ™drzejewski-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),) +libexec_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 = \ + $(AM_CFLAGS) \ + $(MICROHTTPD_CFLAGS) + +systemd_journal_remote_LDADD += \ + $(MICROHTTPD_LIBS) + +ifneq ($(ENABLE_TMPFILES),) +dist_tmpfiles_DATA += \ + tmpfiles.d/systemd-remote.conf +endif # ENABLE_TMPFILES + +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-remote/systemd-journal-remote/journal-remote-parse.c b/src/grp-journal-remote/systemd-journal-remote/journal-remote-parse.c new file mode 100644 index 0000000000..9ba9ee3fc0 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/journal-remote-parse.c @@ -0,0 +1,506 @@ +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew JÄ™drzejewski-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 "alloc-util.h" +#include "fd-util.h" +#include "journal-remote-parse.h" +#include "journald-native.h" +#include "parse-util.h" +#include "string-util.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-remote/systemd-journal-remote/journal-remote-parse.h b/src/grp-journal-remote/systemd-journal-remote/journal-remote-parse.h new file mode 100644 index 0000000000..4f47ea89d6 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/journal-remote-parse.h @@ -0,0 +1,69 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew JÄ™drzejewski-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-remote/systemd-journal-remote/journal-remote-write.c b/src/grp-journal-remote/systemd-journal-remote/journal-remote-write.c new file mode 100644 index 0000000000..7bba52566e --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/journal-remote-write.c @@ -0,0 +1,168 @@ +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew JÄ™drzejewski-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 "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) { + free(w); + return NULL; + } + + 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); + + free(w); + + return NULL; +} + +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-remote/systemd-journal-remote/journal-remote-write.h b/src/grp-journal-remote/systemd-journal-remote/journal-remote-write.h new file mode 100644 index 0000000000..53ba45fc04 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/journal-remote-write.h @@ -0,0 +1,70 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew JÄ™drzejewski-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-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-remote/systemd-journal-remote/journal-remote.c b/src/grp-journal-remote/systemd-journal-remote/journal-remote.c new file mode 100644 index 0000000000..9b4d12d336 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/journal-remote.c @@ -0,0 +1,1601 @@ +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew JÄ™drzejewski-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> + +#ifdef HAVE_GNUTLS +#include <gnutls/gnutls.h> +#endif + +#include <systemd/sd-daemon.h> + +#include "alloc-util.h" +#include "conf-parser.h" +#include "def.h" +#include "escape.h" +#include "fd-util.h" +#include "fileio.h" +#include "journal-file.h" +#include "journal-remote-write.h" +#include "journal-remote.h" +#include "journald-native.h" +#include "macro.h" +#include "parse-util.h" +#include "signal-util.h" +#include "socket-util.h" +#include "stat-util.h" +#include "stdio-util.h" +#include "string-table.h" +#include "string-util.h" +#include "strv.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"); + + 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, + MHD_HTTP_REQUEST_ENTITY_TOO_LARGE, + "Entry is too large, maximum is %u bytes.\n", + DATA_SIZE_MAX); + else + return mhd_respondf(connection, + MHD_HTTP_UNPROCESSABLE_ENTITY, + "Processing failed: %s.", strerror(-r)); + } + } + + if (!finished) + return MHD_YES; + + /* The upload is finished */ + + remaining = source_non_empty(source); + if (remaining > 0) { + log_warning("Premature EOFbyte. %zu bytes lost.", remaining); + return mhd_respondf(connection, MHD_HTTP_EXPECTATION_FAILED, + "Premature EOF. %zu bytes of trailing data not processed.", + remaining); + } + + return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK.\n"); +}; + +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.\n"); + + if (!streq(url, "/upload")) + return mhd_respond(connection, MHD_HTTP_NOT_FOUND, + "Not found.\n"); + + 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.\n"); + + { + 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_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, + strerror(-r)); + + 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(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 %s.", r > 0 ? "enabled" : "disabled"); + + 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-remote/systemd-journal-remote/journal-remote.conf.in b/src/grp-journal-remote/systemd-journal-remote/journal-remote.conf.in new file mode 100644 index 0000000000..7122d63362 --- /dev/null +++ b/src/grp-journal-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-remote/systemd-journal-remote/journal-remote.h b/src/grp-journal-remote/systemd-journal-remote/journal-remote.h new file mode 100644 index 0000000000..58487e498a --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-remote/journal-remote.h @@ -0,0 +1,52 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew JÄ™drzejewski-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 "hashmap.h" +#include "journal-remote-parse.h" +#include "journal-remote-write.h" +#include "microhttpd-util.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-remote/systemd-journal-upload/Makefile b/src/grp-journal-remote/systemd-journal-upload/Makefile new file mode 100644 index 0000000000..4d8fba8fd0 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-upload/Makefile @@ -0,0 +1,54 @@ +# -*- 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 JÄ™drzejewski-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_LIBCURL),) +libexec_PROGRAMS += \ + systemd-journal-upload + +systemd_journal_upload_SOURCES = \ + src/journal-remote/journal-upload.h \ + src/journal-remote/journal-upload.c \ + src/journal-remote/journal-upload-journal.c + +systemd_journal_upload_CFLAGS = \ + $(AM_CFLAGS) \ + $(LIBCURL_CFLAGS) + +systemd_journal_upload_LDADD = \ + libshared.la \ + $(LIBCURL_LIBS) + +nodist_systemunit_DATA += \ + units/systemd-journal-upload.service + +nodist_pkgsysconf_DATA += \ + src/journal-remote/journal-upload.conf +endif + +EXTRA_DIST += \ + units/systemd-journal-upload.service.in \ + src/journal-remote/journal-upload.conf.in + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-journal-remote/systemd-journal-upload/journal-upload-journal.c b/src/grp-journal-remote/systemd-journal-upload/journal-upload-journal.c new file mode 100644 index 0000000000..aef095c8c9 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-upload/journal-upload-journal.c @@ -0,0 +1,422 @@ +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew JÄ™drzejewski-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 <curl/curl.h> +#include <stdbool.h> + +#include "alloc-util.h" +#include "journal-upload.h" +#include "log.h" +#include "utf8.h" +#include "util.h" +#include <systemd/sd-daemon.h> + +/** + * Write up to size bytes to buf. Return negative on error, and number of + * bytes written otherwise. The last case is a kind of an error too. + */ +static ssize_t write_entry(char *buf, size_t size, Uploader *u) { + int r; + size_t pos = 0; + + assert(size <= SSIZE_MAX); + + for (;;) { + + switch(u->entry_state) { + case ENTRY_CURSOR: { + u->current_cursor = mfree(u->current_cursor); + + r = sd_journal_get_cursor(u->journal, &u->current_cursor); + if (r < 0) + return log_error_errno(r, "Failed to get cursor: %m"); + + r = snprintf(buf + pos, size - pos, + "__CURSOR=%s\n", u->current_cursor); + if (pos + r > size) + /* not enough space */ + return pos; + + u->entry_state++; + + if (pos + r == size) { + /* exactly one character short, but we don't need it */ + buf[size - 1] = '\n'; + return size; + } + + pos += r; + } /* fall through */ + + case ENTRY_REALTIME: { + usec_t realtime; + + r = sd_journal_get_realtime_usec(u->journal, &realtime); + if (r < 0) + return log_error_errno(r, "Failed to get realtime timestamp: %m"); + + r = snprintf(buf + pos, size - pos, + "__REALTIME_TIMESTAMP="USEC_FMT"\n", realtime); + if (r + pos > size) + /* not enough space */ + return pos; + + u->entry_state++; + + if (r + pos == size) { + /* exactly one character short, but we don't need it */ + buf[size - 1] = '\n'; + return size; + } + + pos += r; + } /* fall through */ + + case ENTRY_MONOTONIC: { + usec_t monotonic; + sd_id128_t boot_id; + + r = sd_journal_get_monotonic_usec(u->journal, &monotonic, &boot_id); + if (r < 0) + return log_error_errno(r, "Failed to get monotonic timestamp: %m"); + + r = snprintf(buf + pos, size - pos, + "__MONOTONIC_TIMESTAMP="USEC_FMT"\n", monotonic); + if (r + pos > size) + /* not enough space */ + return pos; + + u->entry_state++; + + if (r + pos == size) { + /* exactly one character short, but we don't need it */ + buf[size - 1] = '\n'; + return size; + } + + pos += r; + } /* fall through */ + + case ENTRY_BOOT_ID: { + sd_id128_t boot_id; + char sid[33]; + + r = sd_journal_get_monotonic_usec(u->journal, NULL, &boot_id); + if (r < 0) + return log_error_errno(r, "Failed to get monotonic timestamp: %m"); + + r = snprintf(buf + pos, size - pos, + "_BOOT_ID=%s\n", sd_id128_to_string(boot_id, sid)); + if (r + pos > size) + /* not enough space */ + return pos; + + u->entry_state++; + + if (r + pos == size) { + /* exactly one character short, but we don't need it */ + buf[size - 1] = '\n'; + return size; + } + + pos += r; + } /* fall through */ + + case ENTRY_NEW_FIELD: { + u->field_pos = 0; + + r = sd_journal_enumerate_data(u->journal, + &u->field_data, + &u->field_length); + if (r < 0) + return log_error_errno(r, "Failed to move to next field in entry: %m"); + else if (r == 0) { + u->entry_state = ENTRY_OUTRO; + continue; + } + + if (!utf8_is_printable_newline(u->field_data, + u->field_length, false)) { + u->entry_state = ENTRY_BINARY_FIELD_START; + continue; + } + + u->entry_state++; + } /* fall through */ + + case ENTRY_TEXT_FIELD: + case ENTRY_BINARY_FIELD: { + bool done; + size_t tocopy; + + done = size - pos > u->field_length - u->field_pos; + if (done) + tocopy = u->field_length - u->field_pos; + else + tocopy = size - pos; + + memcpy(buf + pos, + (char*) u->field_data + u->field_pos, + tocopy); + + if (done) { + buf[pos + tocopy] = '\n'; + pos += tocopy + 1; + u->entry_state = ENTRY_NEW_FIELD; + continue; + } else { + u->field_pos += tocopy; + return size; + } + } + + case ENTRY_BINARY_FIELD_START: { + const char *c; + size_t len; + + c = memchr(u->field_data, '=', u->field_length); + if (!c || c == u->field_data) { + log_error("Invalid field."); + return -EINVAL; + } + + len = c - (const char*)u->field_data; + + /* need space for label + '\n' */ + if (size - pos < len + 1) + return pos; + + memcpy(buf + pos, u->field_data, len); + buf[pos + len] = '\n'; + pos += len + 1; + + u->field_pos = len + 1; + u->entry_state++; + } /* fall through */ + + case ENTRY_BINARY_FIELD_SIZE: { + uint64_t le64; + + /* need space for uint64_t */ + if (size - pos < 8) + return pos; + + le64 = htole64(u->field_length - u->field_pos); + memcpy(buf + pos, &le64, 8); + pos += 8; + + u->entry_state++; + continue; + } + + case ENTRY_OUTRO: + /* need space for '\n' */ + if (size - pos < 1) + return pos; + + buf[pos++] = '\n'; + u->entry_state++; + u->entries_sent++; + + return pos; + + default: + assert_not_reached("WTF?"); + } + } + assert_not_reached("WTF?"); +} + +static inline void check_update_watchdog(Uploader *u) { + usec_t after; + usec_t elapsed_time; + + if (u->watchdog_usec <= 0) + return; + + after = now(CLOCK_MONOTONIC); + elapsed_time = usec_sub(after, u->watchdog_timestamp); + if (elapsed_time > u->watchdog_usec / 2) { + log_debug("Update watchdog timer"); + sd_notify(false, "WATCHDOG=1"); + u->watchdog_timestamp = after; + } +} + +static size_t journal_input_callback(void *buf, size_t size, size_t nmemb, void *userp) { + Uploader *u = userp; + int r; + sd_journal *j; + size_t filled = 0; + ssize_t w; + + assert(u); + assert(nmemb <= SSIZE_MAX / size); + + check_update_watchdog(u); + + j = u->journal; + + while (j && filled < size * nmemb) { + if (u->entry_state == ENTRY_DONE) { + r = sd_journal_next(j); + if (r < 0) { + log_error_errno(r, "Failed to move to next entry in journal: %m"); + return CURL_READFUNC_ABORT; + } else if (r == 0) { + if (u->input_event) + log_debug("No more entries, waiting for journal."); + else { + log_info("No more entries, closing journal."); + close_journal_input(u); + } + + u->uploading = false; + + break; + } + + u->entry_state = ENTRY_CURSOR; + } + + w = write_entry((char*)buf + filled, size * nmemb - filled, u); + if (w < 0) + return CURL_READFUNC_ABORT; + filled += w; + + if (filled == 0) { + log_error("Buffer space is too small to write entry."); + return CURL_READFUNC_ABORT; + } else if (u->entry_state != ENTRY_DONE) + /* This means that all available space was used up */ + break; + + log_debug("Entry %zu (%s) has been uploaded.", + u->entries_sent, u->current_cursor); + } + + return filled; +} + +void close_journal_input(Uploader *u) { + assert(u); + + if (u->journal) { + log_debug("Closing journal input."); + + sd_journal_close(u->journal); + u->journal = NULL; + } + u->timeout = 0; +} + +static int process_journal_input(Uploader *u, int skip) { + int r; + + if (u->uploading) + return 0; + + r = sd_journal_next_skip(u->journal, skip); + if (r < 0) + return log_error_errno(r, "Failed to skip to next entry: %m"); + else if (r < skip) + return 0; + + /* have data */ + u->entry_state = ENTRY_CURSOR; + return start_upload(u, journal_input_callback, u); +} + +int check_journal_input(Uploader *u) { + if (u->input_event) { + int r; + + r = sd_journal_process(u->journal); + if (r < 0) { + log_error_errno(r, "Failed to process journal: %m"); + close_journal_input(u); + return r; + } + + if (r == SD_JOURNAL_NOP) + return 0; + } + + return process_journal_input(u, 1); +} + +static int dispatch_journal_input(sd_event_source *event, + int fd, + uint32_t revents, + void *userp) { + Uploader *u = userp; + + assert(u); + + if (u->uploading) + return 0; + + log_debug("Detected journal input, checking for new data."); + return check_journal_input(u); +} + +int open_journal_for_upload(Uploader *u, + sd_journal *j, + const char *cursor, + bool after_cursor, + bool follow) { + int fd, r, events; + + u->journal = j; + + sd_journal_set_data_threshold(j, 0); + + if (follow) { + fd = sd_journal_get_fd(j); + if (fd < 0) + return log_error_errno(fd, "sd_journal_get_fd failed: %m"); + + events = sd_journal_get_events(j); + + r = sd_journal_reliable_fd(j); + assert(r >= 0); + if (r > 0) + u->timeout = -1; + else + u->timeout = JOURNAL_UPLOAD_POLL_TIMEOUT; + + r = sd_event_add_io(u->events, &u->input_event, + fd, events, dispatch_journal_input, u); + if (r < 0) + return log_error_errno(r, "Failed to register input event: %m"); + + log_debug("Listening for journal events on fd:%d, timeout %d", + fd, u->timeout == (uint64_t) -1 ? -1 : (int) u->timeout); + } else + log_debug("Not listening for journal events."); + + if (cursor) { + r = sd_journal_seek_cursor(j, cursor); + if (r < 0) + return log_error_errno(r, "Failed to seek to cursor %s: %m", + cursor); + } + + return process_journal_input(u, 1 + !!after_cursor); +} diff --git a/src/grp-journal-remote/systemd-journal-upload/journal-upload.c b/src/grp-journal-remote/systemd-journal-upload/journal-upload.c new file mode 100644 index 0000000000..e622f6c1e1 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-upload/journal-upload.c @@ -0,0 +1,880 @@ +/*** + This file is part of systemd. + + Copyright 2014 Zbigniew JÄ™drzejewski-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 <curl/curl.h> +#include <fcntl.h> +#include <getopt.h> +#include <stdio.h> +#include <sys/stat.h> + +#include <systemd/sd-daemon.h> + +#include "alloc-util.h" +#include "conf-parser.h" +#include "def.h" +#include "fd-util.h" +#include "fileio.h" +#include "formats-util.h" +#include "glob-util.h" +#include "journal-upload.h" +#include "log.h" +#include "mkdir.h" +#include "parse-util.h" +#include "sigbus.h" +#include "signal-util.h" +#include "string-util.h" +#include "util.h" + +#define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-upload.pem" +#define CERT_FILE CERTIFICATE_ROOT "/certs/journal-upload.pem" +#define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem" +#define DEFAULT_PORT 19532 + +static const char* arg_url = NULL; +static const char *arg_key = NULL; +static const char *arg_cert = NULL; +static const char *arg_trust = NULL; +static const char *arg_directory = NULL; +static char **arg_file = NULL; +static const char *arg_cursor = NULL; +static bool arg_after_cursor = false; +static int arg_journal_type = 0; +static const char *arg_machine = NULL; +static bool arg_merge = false; +static int arg_follow = -1; +static const char *arg_save_state = NULL; + +static void close_fd_input(Uploader *u); + +#define SERVER_ANSWER_KEEP 2048 + +#define STATE_FILE "/var/lib/systemd/journal-upload/state" + +#define easy_setopt(curl, opt, value, level, cmd) \ + do { \ + code = curl_easy_setopt(curl, opt, value); \ + if (code) { \ + log_full(level, \ + "curl_easy_setopt " #opt " failed: %s", \ + curl_easy_strerror(code)); \ + cmd; \ + } \ + } while (0) + +static size_t output_callback(char *buf, + size_t size, + size_t nmemb, + void *userp) { + Uploader *u = userp; + + assert(u); + + log_debug("The server answers (%zu bytes): %.*s", + size*nmemb, (int)(size*nmemb), buf); + + if (nmemb && !u->answer) { + u->answer = strndup(buf, size*nmemb); + if (!u->answer) + log_warning_errno(ENOMEM, "Failed to store server answer (%zu bytes): %m", + size*nmemb); + } + + return size * nmemb; +} + +static int check_cursor_updating(Uploader *u) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + if (!u->state_file) + return 0; + + r = mkdir_parents(u->state_file, 0755); + if (r < 0) + return log_error_errno(r, "Cannot create parent directory of state file %s: %m", + u->state_file); + + r = fopen_temporary(u->state_file, &f, &temp_path); + if (r < 0) + return log_error_errno(r, "Cannot save state to %s: %m", + u->state_file); + unlink(temp_path); + + return 0; +} + +static int update_cursor_state(Uploader *u) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + if (!u->state_file || !u->last_cursor) + return 0; + + r = fopen_temporary(u->state_file, &f, &temp_path); + if (r < 0) + goto fail; + + fprintf(f, + "# This is private data. Do not parse.\n" + "LAST_CURSOR=%s\n", + u->last_cursor); + + r = fflush_and_check(f); + if (r < 0) + goto fail; + + if (rename(temp_path, u->state_file) < 0) { + r = -errno; + goto fail; + } + + return 0; + +fail: + if (temp_path) + (void) unlink(temp_path); + + (void) unlink(u->state_file); + + return log_error_errno(r, "Failed to save state %s: %m", u->state_file); +} + +static int load_cursor_state(Uploader *u) { + int r; + + if (!u->state_file) + return 0; + + r = parse_env_file(u->state_file, NEWLINE, + "LAST_CURSOR", &u->last_cursor, + NULL); + + if (r == -ENOENT) + log_debug("State file %s is not present.", u->state_file); + else if (r < 0) + return log_error_errno(r, "Failed to read state file %s: %m", + u->state_file); + else + log_debug("Last cursor was %s", u->last_cursor); + + return 0; +} + + + +int start_upload(Uploader *u, + size_t (*input_callback)(void *ptr, + size_t size, + size_t nmemb, + void *userdata), + void *data) { + CURLcode code; + + assert(u); + assert(input_callback); + + if (!u->header) { + struct curl_slist *h; + + h = curl_slist_append(NULL, "Content-Type: application/vnd.fdo.journal"); + if (!h) + return log_oom(); + + h = curl_slist_append(h, "Transfer-Encoding: chunked"); + if (!h) { + curl_slist_free_all(h); + return log_oom(); + } + + h = curl_slist_append(h, "Accept: text/plain"); + if (!h) { + curl_slist_free_all(h); + return log_oom(); + } + + u->header = h; + } + + if (!u->easy) { + CURL *curl; + + curl = curl_easy_init(); + if (!curl) { + log_error("Call to curl_easy_init failed."); + return -ENOSR; + } + + /* tell it to POST to the URL */ + easy_setopt(curl, CURLOPT_POST, 1L, + LOG_ERR, return -EXFULL); + + easy_setopt(curl, CURLOPT_ERRORBUFFER, u->error, + LOG_ERR, return -EXFULL); + + /* set where to write to */ + easy_setopt(curl, CURLOPT_WRITEFUNCTION, output_callback, + LOG_ERR, return -EXFULL); + + easy_setopt(curl, CURLOPT_WRITEDATA, data, + LOG_ERR, return -EXFULL); + + /* set where to read from */ + easy_setopt(curl, CURLOPT_READFUNCTION, input_callback, + LOG_ERR, return -EXFULL); + + easy_setopt(curl, CURLOPT_READDATA, data, + LOG_ERR, return -EXFULL); + + /* use our special own mime type and chunked transfer */ + easy_setopt(curl, CURLOPT_HTTPHEADER, u->header, + LOG_ERR, return -EXFULL); + + if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) + /* enable verbose for easier tracing */ + easy_setopt(curl, CURLOPT_VERBOSE, 1L, LOG_WARNING, ); + + easy_setopt(curl, CURLOPT_USERAGENT, + "systemd-journal-upload " PACKAGE_STRING, + LOG_WARNING, ); + + if (arg_key || startswith(u->url, "https://")) { + easy_setopt(curl, CURLOPT_SSLKEY, arg_key ?: PRIV_KEY_FILE, + LOG_ERR, return -EXFULL); + easy_setopt(curl, CURLOPT_SSLCERT, arg_cert ?: CERT_FILE, + LOG_ERR, return -EXFULL); + } + + if (streq_ptr(arg_trust, "all")) + easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0, + LOG_ERR, return -EUCLEAN); + else if (arg_trust || startswith(u->url, "https://")) + easy_setopt(curl, CURLOPT_CAINFO, arg_trust ?: TRUST_FILE, + LOG_ERR, return -EXFULL); + + if (arg_key || arg_trust) + easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1, + LOG_WARNING, ); + + u->easy = curl; + } else { + /* truncate the potential old error message */ + u->error[0] = '\0'; + + free(u->answer); + u->answer = 0; + } + + /* upload to this place */ + code = curl_easy_setopt(u->easy, CURLOPT_URL, u->url); + if (code) { + log_error("curl_easy_setopt CURLOPT_URL failed: %s", + curl_easy_strerror(code)); + return -EXFULL; + } + + u->uploading = true; + + return 0; +} + +static size_t fd_input_callback(void *buf, size_t size, size_t nmemb, void *userp) { + Uploader *u = userp; + + ssize_t r; + + assert(u); + assert(nmemb <= SSIZE_MAX / size); + + if (u->input < 0) + return 0; + + r = read(u->input, buf, size * nmemb); + log_debug("%s: allowed %zu, read %zd", __func__, size*nmemb, r); + + if (r > 0) + return r; + + u->uploading = false; + if (r == 0) { + log_debug("Reached EOF"); + close_fd_input(u); + return 0; + } else { + log_error_errno(errno, "Aborting transfer after read error on input: %m."); + return CURL_READFUNC_ABORT; + } +} + +static void close_fd_input(Uploader *u) { + assert(u); + + if (u->input >= 0) + close_nointr(u->input); + u->input = -1; + u->timeout = 0; +} + +static int dispatch_fd_input(sd_event_source *event, + int fd, + uint32_t revents, + void *userp) { + Uploader *u = userp; + + assert(u); + assert(fd >= 0); + + if (revents & EPOLLHUP) { + log_debug("Received HUP"); + close_fd_input(u); + return 0; + } + + if (!(revents & EPOLLIN)) { + log_warning("Unexpected poll event %"PRIu32".", revents); + return -EINVAL; + } + + if (u->uploading) { + log_warning("dispatch_fd_input called when uploading, ignoring."); + return 0; + } + + return start_upload(u, fd_input_callback, u); +} + +static int open_file_for_upload(Uploader *u, const char *filename) { + int fd, r = 0; + + if (streq(filename, "-")) + fd = STDIN_FILENO; + else { + fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOCTTY); + if (fd < 0) + return log_error_errno(errno, "Failed to open %s: %m", filename); + } + + u->input = fd; + + if (arg_follow) { + r = sd_event_add_io(u->events, &u->input_event, + fd, EPOLLIN, dispatch_fd_input, u); + if (r < 0) { + if (r != -EPERM || arg_follow > 0) + return log_error_errno(r, "Failed to register input event: %m"); + + /* Normal files should just be consumed without polling. */ + r = start_upload(u, fd_input_callback, u); + } + } + + return r; +} + +static int dispatch_sigterm(sd_event_source *event, + const struct signalfd_siginfo *si, + void *userdata) { + Uploader *u = userdata; + + assert(u); + + log_received_signal(LOG_INFO, si); + + close_fd_input(u); + close_journal_input(u); + + sd_event_exit(u->events, 0); + return 0; +} + +static int setup_signals(Uploader *u) { + int r; + + assert(u); + + assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0); + + r = sd_event_add_signal(u->events, &u->sigterm_event, SIGTERM, dispatch_sigterm, u); + if (r < 0) + return r; + + r = sd_event_add_signal(u->events, &u->sigint_event, SIGINT, dispatch_sigterm, u); + if (r < 0) + return r; + + return 0; +} + +static int setup_uploader(Uploader *u, const char *url, const char *state_file) { + int r; + const char *host, *proto = ""; + + assert(u); + assert(url); + + memzero(u, sizeof(Uploader)); + u->input = -1; + + if (!(host = startswith(url, "http://")) && !(host = startswith(url, "https://"))) { + host = url; + proto = "https://"; + } + + if (strchr(host, ':')) + u->url = strjoin(proto, url, "/upload", NULL); + else { + char *t; + size_t x; + + t = strdupa(url); + x = strlen(t); + while (x > 0 && t[x - 1] == '/') + t[x - 1] = '\0'; + + u->url = strjoin(proto, t, ":" STRINGIFY(DEFAULT_PORT), "/upload", NULL); + } + if (!u->url) + return log_oom(); + + u->state_file = state_file; + + r = sd_event_default(&u->events); + if (r < 0) + return log_error_errno(r, "sd_event_default failed: %m"); + + r = setup_signals(u); + if (r < 0) + return log_error_errno(r, "Failed to set up signals: %m"); + + (void) sd_watchdog_enabled(false, &u->watchdog_usec); + + return load_cursor_state(u); +} + +static void destroy_uploader(Uploader *u) { + assert(u); + + curl_easy_cleanup(u->easy); + curl_slist_free_all(u->header); + free(u->answer); + + free(u->last_cursor); + free(u->current_cursor); + + free(u->url); + + u->input_event = sd_event_source_unref(u->input_event); + + close_fd_input(u); + close_journal_input(u); + + sd_event_source_unref(u->sigterm_event); + sd_event_source_unref(u->sigint_event); + sd_event_unref(u->events); +} + +static int perform_upload(Uploader *u) { + CURLcode code; + long status; + + assert(u); + + u->watchdog_timestamp = now(CLOCK_MONOTONIC); + code = curl_easy_perform(u->easy); + if (code) { + if (u->error[0]) + log_error("Upload to %s failed: %.*s", + u->url, (int) sizeof(u->error), u->error); + else + log_error("Upload to %s failed: %s", + u->url, curl_easy_strerror(code)); + return -EIO; + } + + code = curl_easy_getinfo(u->easy, CURLINFO_RESPONSE_CODE, &status); + if (code) { + log_error("Failed to retrieve response code: %s", + curl_easy_strerror(code)); + return -EUCLEAN; + } + + if (status >= 300) { + log_error("Upload to %s failed with code %ld: %s", + u->url, status, strna(u->answer)); + return -EIO; + } else if (status < 200) { + log_error("Upload to %s finished with unexpected code %ld: %s", + u->url, status, strna(u->answer)); + return -EIO; + } else + log_debug("Upload finished successfully with code %ld: %s", + status, strna(u->answer)); + + free(u->last_cursor); + u->last_cursor = u->current_cursor; + u->current_cursor = NULL; + + return update_cursor_state(u); +} + +static int parse_config(void) { + const ConfigTableItem items[] = { + { "Upload", "URL", config_parse_string, 0, &arg_url }, + { "Upload", "ServerKeyFile", config_parse_path, 0, &arg_key }, + { "Upload", "ServerCertificateFile", config_parse_path, 0, &arg_cert }, + { "Upload", "TrustedCertificateFile", config_parse_path, 0, &arg_trust }, + {}}; + + return config_parse_many(PKGSYSCONFDIR "/journal-upload.conf", + CONF_PATHS_NULSTR("systemd/journal-upload.conf.d"), + "Upload\0", config_item_table_lookup, items, + false, NULL); +} + +static void help(void) { + printf("%s -u URL {FILE|-}...\n\n" + "Upload journal events to a remote server.\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " -u --url=URL Upload to this address (default port " + STRINGIFY(DEFAULT_PORT) ")\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" + " --system Use the system journal\n" + " --user Use the user journal for the current user\n" + " -m --merge Use all available journals\n" + " -M --machine=CONTAINER Operate on local container\n" + " -D --directory=PATH Use journal files from directory\n" + " --file=PATH Use this journal file\n" + " --cursor=CURSOR Start at the specified cursor\n" + " --after-cursor=CURSOR Start after the specified cursor\n" + " --follow[=BOOL] Do [not] wait for input\n" + " --save-state[=FILE] Save uploaded cursors (default \n" + " " STATE_FILE ")\n" + " -h --help Show this help and exit\n" + " --version Print version string and exit\n" + , program_invocation_short_name); +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + ARG_KEY, + ARG_CERT, + ARG_TRUST, + ARG_USER, + ARG_SYSTEM, + ARG_FILE, + ARG_CURSOR, + ARG_AFTER_CURSOR, + ARG_FOLLOW, + ARG_SAVE_STATE, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "url", required_argument, NULL, 'u' }, + { "key", required_argument, NULL, ARG_KEY }, + { "cert", required_argument, NULL, ARG_CERT }, + { "trust", required_argument, NULL, ARG_TRUST }, + { "system", no_argument, NULL, ARG_SYSTEM }, + { "user", no_argument, NULL, ARG_USER }, + { "merge", no_argument, NULL, 'm' }, + { "machine", required_argument, NULL, 'M' }, + { "directory", required_argument, NULL, 'D' }, + { "file", required_argument, NULL, ARG_FILE }, + { "cursor", required_argument, NULL, ARG_CURSOR }, + { "after-cursor", required_argument, NULL, ARG_AFTER_CURSOR }, + { "follow", optional_argument, NULL, ARG_FOLLOW }, + { "save-state", optional_argument, NULL, ARG_SAVE_STATE }, + {} + }; + + int c, r; + + assert(argc >= 0); + assert(argv); + + opterr = 0; + + while ((c = getopt_long(argc, argv, "hu:mM:D:", options, NULL)) >= 0) + switch(c) { + case 'h': + help(); + return 0 /* done */; + + case ARG_VERSION: + return version(); + + case 'u': + if (arg_url) { + log_error("cannot use more than one --url"); + return -EINVAL; + } + + arg_url = optarg; + break; + + case ARG_KEY: + if (arg_key) { + log_error("cannot use more than one --key"); + return -EINVAL; + } + + arg_key = optarg; + break; + + case ARG_CERT: + if (arg_cert) { + log_error("cannot use more than one --cert"); + return -EINVAL; + } + + arg_cert = optarg; + break; + + case ARG_TRUST: + if (arg_trust) { + log_error("cannot use more than one --trust"); + return -EINVAL; + } + + arg_trust = optarg; + break; + + case ARG_SYSTEM: + arg_journal_type |= SD_JOURNAL_SYSTEM; + break; + + case ARG_USER: + arg_journal_type |= SD_JOURNAL_CURRENT_USER; + break; + + case 'm': + arg_merge = true; + break; + + case 'M': + if (arg_machine) { + log_error("cannot use more than one --machine/-M"); + return -EINVAL; + } + + arg_machine = optarg; + break; + + case 'D': + if (arg_directory) { + log_error("cannot use more than one --directory/-D"); + return -EINVAL; + } + + arg_directory = optarg; + break; + + case ARG_FILE: + r = glob_extend(&arg_file, optarg); + if (r < 0) + return log_error_errno(r, "Failed to add paths: %m"); + break; + + case ARG_CURSOR: + if (arg_cursor) { + log_error("cannot use more than one --cursor/--after-cursor"); + return -EINVAL; + } + + arg_cursor = optarg; + break; + + case ARG_AFTER_CURSOR: + if (arg_cursor) { + log_error("cannot use more than one --cursor/--after-cursor"); + return -EINVAL; + } + + arg_cursor = optarg; + arg_after_cursor = true; + break; + + case ARG_FOLLOW: + if (optarg) { + r = parse_boolean(optarg); + if (r < 0) { + log_error("Failed to parse --follow= parameter."); + return -EINVAL; + } + + arg_follow = !!r; + } else + arg_follow = true; + + break; + + case ARG_SAVE_STATE: + arg_save_state = optarg ?: STATE_FILE; + break; + + case '?': + log_error("Unknown option %s.", argv[optind-1]); + return -EINVAL; + + case ':': + log_error("Missing argument to %s.", argv[optind-1]); + return -EINVAL; + + default: + assert_not_reached("Unhandled option code."); + } + + if (!arg_url) { + log_error("Required --url/-u option missing."); + return -EINVAL; + } + + if (!!arg_key != !!arg_cert) { + log_error("Options --key and --cert must be used together."); + return -EINVAL; + } + + if (optind < argc && (arg_directory || arg_file || arg_machine || arg_journal_type)) { + log_error("Input arguments make no sense with journal input."); + return -EINVAL; + } + + return 1; +} + +static int open_journal(sd_journal **j) { + int r; + + if (arg_directory) + r = sd_journal_open_directory(j, arg_directory, arg_journal_type); + else if (arg_file) + r = sd_journal_open_files(j, (const char**) arg_file, 0); + else if (arg_machine) + r = sd_journal_open_container(j, arg_machine, 0); + else + r = sd_journal_open(j, !arg_merge*SD_JOURNAL_LOCAL_ONLY + arg_journal_type); + if (r < 0) + log_error_errno(r, "Failed to open %s: %m", + arg_directory ? arg_directory : arg_file ? "files" : "journal"); + return r; +} + +int main(int argc, char **argv) { + Uploader u; + int r; + bool use_journal; + + log_show_color(true); + log_parse_environment(); + + r = parse_config(); + if (r < 0) + goto finish; + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + sigbus_install(); + + r = setup_uploader(&u, arg_url, arg_save_state); + if (r < 0) + goto cleanup; + + sd_event_set_watchdog(u.events, true); + + r = check_cursor_updating(&u); + if (r < 0) + goto cleanup; + + log_debug("%s running as pid "PID_FMT, + program_invocation_short_name, getpid()); + + use_journal = optind >= argc; + if (use_journal) { + sd_journal *j; + r = open_journal(&j); + if (r < 0) + goto finish; + r = open_journal_for_upload(&u, j, + arg_cursor ?: u.last_cursor, + arg_cursor ? arg_after_cursor : true, + !!arg_follow); + if (r < 0) + goto finish; + } + + sd_notify(false, + "READY=1\n" + "STATUS=Processing input..."); + + for (;;) { + r = sd_event_get_state(u.events); + if (r < 0) + break; + if (r == SD_EVENT_FINISHED) + break; + + if (use_journal) { + if (!u.journal) + break; + + r = check_journal_input(&u); + } else if (u.input < 0 && !use_journal) { + if (optind >= argc) + break; + + log_debug("Using %s as input.", argv[optind]); + r = open_file_for_upload(&u, argv[optind++]); + } + if (r < 0) + goto cleanup; + + if (u.uploading) { + r = perform_upload(&u); + if (r < 0) + break; + } + + r = sd_event_run(u.events, u.timeout); + if (r < 0) { + log_error_errno(r, "Failed to run event loop: %m"); + break; + } + } + +cleanup: + sd_notify(false, + "STOPPING=1\n" + "STATUS=Shutting down..."); + + destroy_uploader(&u); + +finish: + return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE; +} diff --git a/src/grp-journal-remote/systemd-journal-upload/journal-upload.conf.in b/src/grp-journal-remote/systemd-journal-upload/journal-upload.conf.in new file mode 100644 index 0000000000..c5670682e8 --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-upload/journal-upload.conf.in @@ -0,0 +1,5 @@ +[Upload] +# URL= +# ServerKeyFile=@CERTIFICATEROOT@/private/journal-upload.pem +# ServerCertificateFile=@CERTIFICATEROOT@/certs/journal-upload.pem +# TrustedCertificateFile=@CERTIFICATEROOT@/ca/trusted.pem diff --git a/src/grp-journal-remote/systemd-journal-upload/journal-upload.h b/src/grp-journal-remote/systemd-journal-upload/journal-upload.h new file mode 100644 index 0000000000..4a521bf78f --- /dev/null +++ b/src/grp-journal-remote/systemd-journal-upload/journal-upload.h @@ -0,0 +1,71 @@ +#pragma once + +#include <inttypes.h> + +#include <systemd/sd-event.h> +#include <systemd/sd-journal.h> +#include "time-util.h" + +typedef enum { + ENTRY_CURSOR = 0, /* Nothing actually written yet. */ + ENTRY_REALTIME, + ENTRY_MONOTONIC, + ENTRY_BOOT_ID, + ENTRY_NEW_FIELD, /* In between fields. */ + ENTRY_TEXT_FIELD, /* In the middle of a text field. */ + ENTRY_BINARY_FIELD_START, /* Writing the name of a binary field. */ + ENTRY_BINARY_FIELD_SIZE, /* Writing the size of a binary field. */ + ENTRY_BINARY_FIELD, /* In the middle of a binary field. */ + ENTRY_OUTRO, /* Writing '\n' */ + ENTRY_DONE, /* Need to move to a new field. */ +} entry_state; + +typedef struct Uploader { + sd_event *events; + sd_event_source *sigint_event, *sigterm_event; + + char *url; + CURL *easy; + bool uploading; + char error[CURL_ERROR_SIZE]; + struct curl_slist *header; + char *answer; + + sd_event_source *input_event; + uint64_t timeout; + + /* fd stuff */ + int input; + + /* journal stuff */ + sd_journal* journal; + + entry_state entry_state; + const void *field_data; + size_t field_pos, field_length; + + /* general metrics */ + const char *state_file; + + size_t entries_sent; + char *last_cursor, *current_cursor; + usec_t watchdog_timestamp; + usec_t watchdog_usec; +} Uploader; + +#define JOURNAL_UPLOAD_POLL_TIMEOUT (10 * USEC_PER_SEC) + +int start_upload(Uploader *u, + size_t (*input_callback)(void *ptr, + size_t size, + size_t nmemb, + void *userdata), + void *data); + +int open_journal_for_upload(Uploader *u, + sd_journal *j, + const char *cursor, + bool after_cursor, + bool follow); +void close_journal_input(Uploader *u); +int check_journal_input(Uploader *u); |