Commit a1a03e30 authored by Lennart Poettering's avatar Lennart Poettering

journal: add call to determine current journal file disk usage

parent ac59a798
......@@ -513,6 +513,7 @@ MANPAGES = \
man/sd_journal_get_cutoff_realtime_usec.3 \
man/sd_journal_get_cursor.3 \
man/sd_journal_get_fd.3 \
man/sd_journal_get_usage.3 \
man/sd_journal_add_match.3 \
man/sd_journal_seek_head.3
......
......@@ -126,8 +126,6 @@ Features:
* add _SYSTEMD_USER_UNIT= field to journal entries
* journal: expose current disk usage
* dracut-shutdown needs to be ordered before unmounting /boot
* wiki: document new logind LockSessions() call
......
......@@ -320,6 +320,14 @@
accessed.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--disk-usage</option></term>
<listitem><para>Shows the current disk
usage of all
journal files.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--setup-keys</option></term>
......
......@@ -78,7 +78,8 @@
<citerefentry><refentrytitle>sd_journal_add_match</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_seek_head</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_get_cursor</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_cutoff_realtime_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>
<citerefentry><refentrytitle>sd_journal_cutoff_realtime_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_get_usage</refentrytitle><manvolnum>3</manvolnum></citerefentry>
and
<citerefentry><refentrytitle>sd_journal_get_fd</refentrytitle><manvolnum>3</manvolnum></citerefentry>
for more information about the functions
......@@ -116,6 +117,7 @@
<citerefentry><refentrytitle>sd_journal_seek_head</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_get_cursor</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_cutoff_realtime_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_get_usage</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
......
<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 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/>.
-->
<refentry id="sd_journal_get_usage">
<refentryinfo>
<title>sd_journal_get_usage</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>sd_journal_get_usage</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>sd_journal_get_usage</refname>
<refpurpose>Journal disk usage</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;systemd/sd-journal.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>sd_journal_get_usage</function></funcdef>
<paramdef>sd_journal* <parameter>j</parameter></paramdef>
<paramdef>uint64_t* <parameter>bytes</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><function>sd_journal_get_usage()</function>
determines the total disk space currently used up by
journal files. If
<literal>SD_JOURNAL_LOCAL_ONLY</literal> has been
passed when opening the journal files this value will
only reflect the size of journal files of the local
host, otherwise of all hosts.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para><function>sd_journal_get_usage()</function>
returns 0 on success or a negative errno-style error
code.</para>
</refsect1>
<refsect1>
<title>Notes</title>
<para>The <function>sd_journal_get_usage()</function>
interface is available as shared library, which can be
compiled and linked to with the
<literal>libsystemd-journal</literal>
<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
file.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_open</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
</para>
</refsect1>
</refentry>
......@@ -1906,6 +1906,8 @@ fail:
void journal_file_print_header(JournalFile *f) {
char a[33], b[33], c[33];
char x[FORMAT_TIMESTAMP_MAX], y[FORMAT_TIMESTAMP_MAX];
struct stat st;
char bytes[FORMAT_BYTES_MAX];
assert(f);
......@@ -1970,6 +1972,9 @@ void journal_file_print_header(JournalFile *f) {
if (JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays))
printf("Entry Array Objects: %llu\n",
(unsigned long long) le64toh(f->header->n_entry_arrays));
if (fstat(f->fd, &st) >= 0)
printf("Disk usage: %s\n", format_bytes(bytes, sizeof(bytes), (off_t) st.st_blocks * 512ULL));
}
int journal_file_open(
......
......@@ -72,7 +72,8 @@ static enum {
ACTION_NEW_ID128,
ACTION_PRINT_HEADER,
ACTION_SETUP_KEYS,
ACTION_VERIFY
ACTION_VERIFY,
ACTION_DISK_USAGE,
} arg_action = ACTION_SHOW;
static int help(void) {
......@@ -96,6 +97,7 @@ static int help(void) {
"Commands:\n"
" --new-id128 Generate a new 128 Bit ID\n"
" --header Show journal header information\n"
" --disk-usage Show total disk usage\n"
#ifdef HAVE_GCRYPT
" --setup-keys Generate new FSS key pair\n"
" --interval=TIME Time interval for changing the FSS sealing key\n"
......@@ -118,7 +120,8 @@ static int parse_argv(int argc, char *argv[]) {
ARG_SETUP_KEYS,
ARG_INTERVAL,
ARG_VERIFY,
ARG_VERIFY_KEY
ARG_VERIFY_KEY,
ARG_DISK_USAGE
};
static const struct option options[] = {
......@@ -141,6 +144,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "interval", required_argument, NULL, ARG_INTERVAL },
{ "verify", no_argument, NULL, ARG_VERIFY },
{ "verify-key", required_argument, NULL, ARG_VERIFY_KEY },
{ "disk-usage", no_argument, NULL, ARG_DISK_USAGE },
{ NULL, 0, NULL, 0 }
};
......@@ -224,6 +228,10 @@ static int parse_argv(int argc, char *argv[]) {
arg_action = ACTION_VERIFY;
break;
case ARG_DISK_USAGE:
arg_action = ACTION_DISK_USAGE;
break;
#ifdef HAVE_GCRYPT
case ARG_SETUP_KEYS:
arg_action = ACTION_SETUP_KEYS;
......@@ -746,6 +754,19 @@ int main(int argc, char *argv[]) {
goto finish;
}
if (arg_action == ACTION_DISK_USAGE) {
uint64_t bytes;
char sbytes[FORMAT_BYTES_MAX];
r = sd_journal_get_usage(j, &bytes);
if (r < 0)
goto finish;
printf("Journals take up %s on disk.\n", format_bytes(sbytes, sizeof(sbytes), bytes));
r = 0;
goto finish;
}
#ifdef HAVE_ACL
if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
......
......@@ -70,3 +70,8 @@ global:
sd_journal_perror;
sd_journal_perror_with_location;
} LIBSYSTEMD_JOURNAL_187;
LIBSYSTEMD_JOURNAL_190 {
global:
sd_journal_get_usage;
} LIBSYSTEMD_JOURNAL_188;
......@@ -2062,6 +2062,29 @@ void journal_print_header(sd_journal *j) {
}
}
_public_ int sd_journal_get_usage(sd_journal *j, uint64_t *bytes) {
Iterator i;
JournalFile *f;
uint64_t sum = 0;
if (!j)
return -EINVAL;
if (!bytes)
return -EINVAL;
HASHMAP_FOREACH(f, j->files, i) {
struct stat st;
if (fstat(f->fd, &st) < 0)
return -errno;
sum += (uint64_t) st.st_blocks * 512ULL;
}
*bytes = sum;
return 0;
}
/* _public_ int sd_journal_query_unique(sd_journal *j, const char *field) { */
/* if (!j) */
/* return -EINVAL; */
......
......@@ -108,6 +108,8 @@ int sd_journal_get_cursor(sd_journal *j, char **cursor);
int sd_journal_get_cutoff_realtime_usec(sd_journal *j, uint64_t *from, uint64_t *to);
int sd_journal_get_cutoff_monotonic_usec(sd_journal *j, const sd_id128_t boot_id, uint64_t *from, uint64_t *to);
int sd_journal_get_usage(sd_journal *j, uint64_t *bytes);
/* int sd_journal_query_unique(sd_journal *j, const char *field); /\* missing *\/ */
/* int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l); /\* missing *\/ */
/* void sd_journal_restart_unique(sd_journal *j); /\* missing *\/ */
......
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