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journal: beef up journal matches considerably

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we now can take multiple matches, and they will apply as AND if they
apply to different fields and OR if they apply to the same fields. Also,
terms of this kind can be combined with an overreaching OR.
This commit is contained in:
Lennart Poettering 2012-07-13 00:29:26 +02:00
parent 362a3f8122
commit cbdca8525b
13 changed files with 999 additions and 372 deletions
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2
.gitignore vendored
View File

@ -1,3 +1,5 @@
/test-journal-match
/test-journal-stream
/test-unit-name
/systemd-system-update-generator
/systemd-fstab-generator

40
Makefile.am
View File

@ -2232,29 +2232,13 @@ journalctl_LDADD = \
libsystemd-logs.la
test_journal_SOURCES = \
src/journal/test-journal.c \
src/journal/sd-journal.c \
src/journal/journal-file.c \
src/journal/lookup3.c \
src/journal/journal-send.c
src/journal/test-journal.c
test_journal_LDADD = \
libsystemd-label.la \
libsystemd-shared.la \
libsystemd-journal-internal.la \
libsystemd-id128-internal.la
if HAVE_XZ
test_journal_SOURCES += \
src/journal/compress.c
test_journal_CFLAGS = \
$(AM_CFLAGS) \
$(XZ_CFLAGS)
test_journal_LDADD += \
$(XZ_LIBS)
endif
test_journal_send_SOURCES = \
src/journal/test-journal-send.c
@ -2263,6 +2247,22 @@ test_journal_send_LDADD = \
libsystemd-journal-internal.la \
libsystemd-id128-internal.la
test_journal_match_SOURCES = \
src/journal/test-journal-match.c
test_journal_match_LDADD = \
libsystemd-shared.la \
libsystemd-journal-internal.la \
libsystemd-id128-internal.la
test_journal_stream_SOURCES = \
src/journal/test-journal-stream.c
test_journal_stream_LDADD = \
libsystemd-shared.la \
libsystemd-journal-internal.la \
libsystemd-id128-internal.la
libsystemd_journal_la_SOURCES = \
src/journal/sd-journal.c \
src/journal/journal-file.c \
@ -2327,7 +2327,9 @@ UNINSTALL_EXEC_HOOKS += \
noinst_PROGRAMS += \
test-journal \
test-journal-send
test-journal-send \
test-journal-match \
test-journal-stream
pkginclude_HEADERS += \
src/systemd/sd-journal.h \

56
man/journalctl.xml
View File

@ -49,7 +49,7 @@
<refsynopsisdiv>
<cmdsynopsis>
<command>journalctl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt">MATCH</arg></command>
<command>journalctl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt" rep="repeat">MATCHES</arg></command>
</cmdsynopsis>
</refsynopsisdiv>
@ -66,12 +66,25 @@
contents of the journal, starting with the oldest
entry collected.</para>
<para>If a match argument is passed the output is
filtered accordingly. A match is in the format
<literal>FIELD=VALUE</literal>,
e.g. <literal>_SYSTEMD_UNIT=httpd.service</literal>. See
<para>If one or more match arguments are passed the
output is filtered accordingly. A match is in the
format <literal>FIELD=VALUE</literal>,
e.g. <literal>_SYSTEMD_UNIT=httpd.service</literal>,
referring to the components of a structured journal
entry. See
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>
for a list of well-known fields.</para>
for a list of well-known fields. If multiple matches
are specified matching different fields the log
entries are filtered by both, i.e. the resulting output
will show only entries matching all the specified
matches of this kind. If two matches apply to the same
field, then they are automatically matched as
alternatives, i.e. the resulting output will show
entries matching any of the specified matches for the
same field. Finally, if the character
"<literal>+</literal>" appears as separate word on the
command line all matches before and after are combined
in a disjunction (i.e. logical OR).</para>
<para>Output is interleaved from all accessible
journal files, whether they are rotated or currently
@ -271,6 +284,37 @@
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>Without arguments all collected logs are shown
unfiltered:</para>
<programlisting>journalctl</programlisting>
<para>With one match specified all entries with a field matching the expression are shown:</para>
<programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service</programlisting>
<para>If two different fields are matched only entries matching both expressions at the same time are shown:</para>
<programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097</programlisting>
<para>If two matches refer to the same field all entries matching either expression are shown:</para>
<programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _SYSTEMD_UNIT=dbus.service</programlisting>
<para>If the separator "<literal>+</literal>" is used
two expression may be combined in a logical OR. The
following will show all messages from the Avahi
service process with the PID 28097 plus all messages
from the D-Bus service (from any of its
processes):</para>
<programlisting>journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097 + _SYSTEMD_UNIT=dbus.service</programlisting>
</refsect1>
<refsect1>
<title>See Also</title>
<para>

7
man/systemd.journal-fields.xml
View File

@ -299,7 +299,12 @@
addresses of journal entries are serialized into
fields prefixed with double underscores. Note that
these aren't proper fields when stored in the journal,
but addressing meta data of entries.</para>
but addressing meta data of entries. They cannot be
written as part of structured log entries via calls
such as
<citerefentry><refentrytitle>sd_journal_send</refentrytitle><manvolnum>3</manvolnum></citerefentry>. They
may also not be used as matches for
<citerefentry><refentrytitle>sd_journal_add_match</refentrytitle><manvolnum>3</manvolnum></citerefentry></para>
<variablelist>
<varlistentry>

207
src/journal/journal-file.c
View File

@ -1212,8 +1212,15 @@ static int generic_array_bisect(JournalFile *f,
}
}
if (k > n)
if (k > n) {
if (direction == DIRECTION_UP) {
i = n;
subtract_one = true;
goto found;
}
return 0;
}
last_p = lp;
@ -1246,7 +1253,7 @@ found:
*offset = p;
if (idx)
*idx = t + i - (subtract_one ? 1 : 0);
*idx = t + i + (subtract_one ? -1 : 0);
return 1;
}
@ -1263,6 +1270,8 @@ static int generic_array_bisect_plus_one(JournalFile *f,
uint64_t *idx) {
int r;
bool step_back = false;
Object *o;
assert(f);
assert(test_object);
@ -1279,9 +1288,32 @@ static int generic_array_bisect_plus_one(JournalFile *f,
if (r == TEST_FOUND)
r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT;
if (r == TEST_RIGHT) {
Object *o;
/* if we are looking with DIRECTION_UP then we need to first
see if in the actual array there is a matching entry, and
return the last one of that. But if there isn't any we need
to return this one. Hence remember this, and return it
below. */
if (r == TEST_LEFT)
step_back = direction == DIRECTION_UP;
if (r == TEST_RIGHT) {
if (direction == DIRECTION_DOWN)
goto found;
else
return 0;
}
r = generic_array_bisect(f, first, n-1, needle, test_object, direction, ret, offset, idx);
if (r == 0 && step_back)
goto found;
if (r > 0 && idx)
(*idx) ++;
return r;
found:
r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o);
if (r < 0)
return r;
@ -1296,16 +1328,37 @@ static int generic_array_bisect_plus_one(JournalFile *f,
*idx = 0;
return 1;
}
r = generic_array_bisect(f, first, n-1, needle, test_object, direction, ret, offset, idx);
if (r > 0 && idx)
(*idx) ++;
return r;
}
static int test_object_offset(JournalFile *f, uint64_t p, uint64_t needle) {
assert(f);
assert(p > 0);
if (p == needle)
return TEST_FOUND;
else if (p < needle)
return TEST_LEFT;
else
return TEST_RIGHT;
}
int journal_file_move_to_entry_by_offset(
JournalFile *f,
uint64_t p,
direction_t direction,
Object **ret,
uint64_t *offset) {
return generic_array_bisect(f,
le64toh(f->header->entry_array_offset),
le64toh(f->header->n_entries),
p,
test_object_offset,
direction,
ret, offset, NULL);
}
static int test_object_seqnum(JournalFile *f, uint64_t p, uint64_t needle) {
Object *o;
int r;
@ -1407,12 +1460,13 @@ int journal_file_move_to_entry_by_monotonic(
Object *o;
int r;
sd_id128_to_string(boot_id, t + 9);
assert(f);
sd_id128_to_string(boot_id, t + 9);
r = journal_file_find_data_object(f, t, strlen(t), &o, NULL);
if (r < 0)
return r;
else if (r == 0)
if (r == 0)
return -ENOENT;
return generic_array_bisect_plus_one(f,
@ -1425,18 +1479,6 @@ int journal_file_move_to_entry_by_monotonic(
ret, offset, NULL);
}
static int test_object_offset(JournalFile *f, uint64_t p, uint64_t needle) {
assert(f);
assert(p > 0);
if (p == needle)
return TEST_FOUND;
else if (p < needle)
return TEST_LEFT;
else
return TEST_RIGHT;
}
int journal_file_next_entry(
JournalFile *f,
Object *o, uint64_t p,
@ -1601,6 +1643,119 @@ int journal_file_next_entry_for_data(
ret, offset);
}
int journal_file_move_to_entry_by_offset_for_data(
JournalFile *f,
uint64_t data_offset,
uint64_t p,
direction_t direction,
Object **ret, uint64_t *offset) {
int r;
Object *d;
assert(f);
r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d);
if (r < 0)
return r;
return generic_array_bisect_plus_one(f,
le64toh(d->data.entry_offset),
le64toh(d->data.entry_array_offset),
le64toh(d->data.n_entries),
p,
test_object_offset,
direction,
ret, offset, NULL);
}
int journal_file_move_to_entry_by_monotonic_for_data(
JournalFile *f,
uint64_t data_offset,
sd_id128_t boot_id,
uint64_t monotonic,
direction_t direction,
Object **ret, uint64_t *offset) {
char t[9+32+1] = "_BOOT_ID=";
Object *o, *d;
int r;
uint64_t b, z;
assert(f);
/* First, seek by time */
sd_id128_to_string(boot_id, t + 9);
r = journal_file_find_data_object(f, t, strlen(t), &o, &b);
if (r < 0)
return r;
if (r == 0)
return -ENOENT;
r = generic_array_bisect_plus_one(f,
le64toh(o->data.entry_offset),
le64toh(o->data.entry_array_offset),
le64toh(o->data.n_entries),
monotonic,
test_object_monotonic,
direction,
NULL, &z, NULL);
if (r <= 0)
return r;
/* And now, continue seeking until we find an entry that
* exists in both bisection arrays */
for (;;) {
Object *qo;
uint64_t p, q;
r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d);
if (r < 0)
return r;
r = generic_array_bisect_plus_one(f,
le64toh(d->data.entry_offset),
le64toh(d->data.entry_array_offset),
le64toh(d->data.n_entries),
z,
test_object_offset,
direction,
NULL, &p, NULL);
if (r <= 0)
return r;
r = journal_file_move_to_object(f, OBJECT_DATA, b, &o);
if (r < 0)
return r;
r = generic_array_bisect_plus_one(f,
le64toh(o->data.entry_offset),
le64toh(o->data.entry_array_offset),
le64toh(o->data.n_entries),
p,
test_object_offset,
direction,
&qo, &q, NULL);
if (r <= 0)
return r;
if (p == q) {
if (ret)
*ret = qo;
if (offset)
*offset = q;
return 1;
}
z = q;
}
return 0;
}
int journal_file_move_to_entry_by_seqnum_for_data(
JournalFile *f,
uint64_t data_offset,

4
src/journal/journal-file.h
View File

@ -43,6 +43,7 @@ enum {
WINDOW_DATA_HASH_TABLE = OBJECT_DATA_HASH_TABLE,
WINDOW_FIELD_HASH_TABLE = OBJECT_FIELD_HASH_TABLE,
WINDOW_ENTRY_ARRAY = OBJECT_ENTRY_ARRAY,
WINDOW_SIGNATURE = OBJECT_SIGNATURE,
WINDOW_HEADER,
_WINDOW_MAX
};
@ -106,12 +107,15 @@ int journal_file_skip_entry(JournalFile *f, Object *o, uint64_t p, int64_t skip,
int journal_file_next_entry_for_data(JournalFile *f, Object *o, uint64_t p, uint64_t data_offset, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_offset(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_seqnum(JournalFile *f, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_realtime(JournalFile *f, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_monotonic(JournalFile *f, sd_id128_t boot_id, uint64_t monotonic, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_offset_for_data(JournalFile *f, uint64_t data_offset, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_seqnum_for_data(JournalFile *f, uint64_t data_offset, uint64_t seqnum, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_realtime_for_data(JournalFile *f, uint64_t data_offset, uint64_t realtime, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_move_to_entry_by_monotonic_for_data(JournalFile *f, uint64_t data_offset, sd_id128_t boot_id, uint64_t monotonic, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset);

38
src/journal/journal-internal.h
View File

@ -28,28 +28,46 @@
#include <systemd/sd-id128.h>
#include "journal-def.h"
#include "list.h"
#include "hashmap.h"
#include "journal-file.h"
typedef enum MatchType MatchType;
typedef enum LocationType LocationType;
typedef struct Match Match;
typedef struct Location Location;
typedef struct Directory Directory;
typedef enum location_type {
LOCATION_HEAD,
LOCATION_TAIL,
LOCATION_DISCRETE
} location_type_t;
typedef enum MatchType {
MATCH_DISCRETE,
MATCH_OR_TERM,
MATCH_AND_TERM
} MatchType;
struct Match {
MatchType type;
Match *parent;
LIST_FIELDS(Match, matches);
/* For concrete matches */
char *data;
size_t size;
le64_t le_hash;
LIST_FIELDS(Match, matches);
/* For terms */
LIST_HEAD(Match, matches);
};
typedef enum LocationType {
LOCATION_HEAD,
LOCATION_TAIL,
LOCATION_DISCRETE
} LocationType;
struct Location {
location_type_t type;
LocationType type;
uint64_t seqnum;
sd_id128_t seqnum_id;
@ -78,6 +96,7 @@ struct sd_journal {
Hashmap *files;
Location current_location;
JournalFile *current_file;
uint64_t current_field;
@ -86,10 +105,11 @@ struct sd_journal {
int inotify_fd;
LIST_HEAD(Match, matches);
unsigned n_matches;
Match *level0, *level1;
unsigned current_invalidate_counter, last_invalidate_counter;
};
char *journal_make_match_string(sd_journal *j);
#endif

10
src/journal/journalctl.c
View File

@ -225,7 +225,9 @@ static int add_matches(sd_journal *j, char **args) {
STRV_FOREACH(i, args) {
if (path_is_absolute(*i)) {
if (streq(*i, "+"))
r = sd_journal_add_disjunction(j);
else if (path_is_absolute(*i)) {
char *p;
const char *path;
struct stat st;
@ -249,7 +251,7 @@ static int add_matches(sd_journal *j, char **args) {
return -ENOMEM;
}
r = sd_journal_add_match(j, t, strlen(t));
r = sd_journal_add_match(j, t, 0);
free(t);
} else {
free(p);
@ -259,10 +261,10 @@ static int add_matches(sd_journal *j, char **args) {
free(p);
} else
r = sd_journal_add_match(j, *i, strlen(*i));
r = sd_journal_add_match(j, *i, 0);
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
log_error("Failed to add match '%s': %s", *i, strerror(-r));
return r;
}
}

752
src/journal/sd-journal.c
View File

@ -87,102 +87,272 @@ static void set_location(sd_journal *j, JournalFile *f, Object *o, uint64_t offs
f->current_offset = offset;
}
static int same_field(const void *_a, size_t s, const void *_b, size_t t) {
static int match_is_valid(const void *data, size_t size) {
const char *b, *p;
assert(data);
if (size < 2)
return false;
if (startswith(data, "__"))
return false;
b = data;
for (p = b; p < b + size; p++) {
if (*p == '=')
return p > b;
if (*p == '_')
continue;
if (*p >= 'A' && *p <= 'Z')
continue;
if (*p >= '0' && *p <= '9')
continue;
return false;
}
return false;
}
static bool same_field(const void *_a, size_t s, const void *_b, size_t t) {
const uint8_t *a = _a, *b = _b;
size_t j;
bool a_good = false, b_good = false, different = false;
for (j = 0; j < s && j < t; j++) {
if (a[j] == '=')
a_good = true;
if (b[j] == '=')
b_good = true;
if (a[j] != b[j])
different = true;
return false;
if (a_good && b_good)
return different ? 0 : 1;
if (a[j] == '=')
return true;
}
return -EINVAL;
return true;
}
static Match *match_new(Match *p, MatchType t) {
Match *m;
m = new0(Match, 1);
if (!m)
return NULL;
m->type = t;
if (p) {
m->parent = p;
LIST_PREPEND(Match, matches, p->matches, m);
}
return m;
}
static void match_free(Match *m) {
assert(m);
while (m->matches)
match_free(m->matches);
if (m->parent)
LIST_REMOVE(Match, matches, m->parent->matches, m);
free(m->data);
free(m);
}
static void match_free_if_empty(Match *m) {
assert(m);
if (m->matches)
return;
match_free(m);
}
_public_ int sd_journal_add_match(sd_journal *j, const void *data, size_t size) {
Match *m, *after = NULL;
Match *l2, *l3, *add_here = NULL, *m;
le64_t le_hash;
if (!j)
return -EINVAL;
if (!data)
return -EINVAL;
if (size <= 1)
return -EINVAL;
if (!memchr(data, '=', size))
return -EINVAL;
if (*(char*) data == '=')
if (size == 0)
size = strlen(data);
if (!match_is_valid(data, size))
return -EINVAL;
/* FIXME: iterating with multiple matches is currently
* broken */
if (j->matches)
return -ENOTSUP;
/* level 0: OR term
* level 1: AND terms
* level 2: OR terms
* level 3: concrete matches */
if (!j->level0) {
j->level0 = match_new(NULL, MATCH_OR_TERM);
if (!j->level0)
return -ENOMEM;
}
if (!j->level1) {
j->level1 = match_new(j->level0, MATCH_AND_TERM);
if (!j->level1)
return -ENOMEM;
}
assert(j->level0->type == MATCH_OR_TERM);
assert(j->level1->type == MATCH_AND_TERM);
le_hash = htole64(hash64(data, size));
LIST_FOREACH(matches, m, j->matches) {
int r;
LIST_FOREACH(matches, l2, j->level1->matches) {
assert(l2->type == MATCH_OR_TERM);
if (m->le_hash == le_hash &&
m->size == size &&
memcmp(m->data, data, size) == 0)
LIST_FOREACH(matches, l3, l2->matches) {
assert(l3->type == MATCH_DISCRETE);
/* Exactly the same match already? Then ignore
* this addition */
if (l3->le_hash == le_hash &&
l3->size == size &&
memcmp(l3->data, data, size) == 0)
return 0;
r = same_field(data, size, m->data, m->size);
if (r < 0)
return r;
else if (r > 0)
after = m;
/* Same field? Then let's add this to this OR term */
if (same_field(data, size, l3->data, l3->size)) {
add_here = l2;
break;
}
}
m = new0(Match, 1);
if (add_here)
break;
}
if (!add_here) {
add_here = match_new(j->level1, MATCH_OR_TERM);
if (!add_here)
goto fail;
}
m = match_new(add_here, MATCH_DISCRETE);
if (!m)
return -ENOMEM;
goto fail;
m->size = size;
m->data = malloc(m->size);
if (!m->data) {
free(m);
return -ENOMEM;
}
memcpy(m->data, data, size);
m->le_hash = le_hash;
/* Matches for the same fields we order adjacent to each
* other */
LIST_INSERT_AFTER(Match, matches, j->matches, after, m);
j->n_matches ++;
m->size = size;
m->data = memdup(data, size);
if (!m->data)
goto fail;
detach_location(j);
return 0;
fail:
if (add_here)
match_free_if_empty(add_here);
if (j->level1)
match_free_if_empty(j->level1);
if (j->level0)
match_free_if_empty(j->level0);
return -ENOMEM;
}
_public_ int sd_journal_add_disjunction(sd_journal *j) {
Match *m;
assert(j);
if (!j->level0)
return 0;
if (!j->level1)
return 0;
if (!j->level1->matches)
return 0;
m = match_new(j->level0, MATCH_AND_TERM);
if (!m)
return -ENOMEM;
j->level1 = m;
return 0;
}
static char *match_make_string(Match *m) {
char *p, *r;
Match *i;
bool enclose = false;
if (!m)
return strdup("");
if (m->type == MATCH_DISCRETE)
return strndup(m->data, m->size);
p = NULL;
LIST_FOREACH(matches, i, m->matches) {
char *t, *k;
t = match_make_string(i);
if (!t) {
free(p);
return NULL;
}
if (p) {
k = join(p, m->type == MATCH_OR_TERM ? " OR " : " AND ", t, NULL);
free(p);
free(t);
if (!k)
return NULL;
p = k;
enclose = true;
} else {
free(p);
p = t;
}
}
if (enclose) {
r = join("(", p, ")", NULL);
free(p);
return r;
}
return p;
}
char *journal_make_match_string(sd_journal *j) {
assert(j);
return match_make_string(j->level0);
}
_public_ void sd_journal_flush_matches(sd_journal *j) {
if (!j)
return;
while (j->matches) {
Match *m = j->matches;
if (j->level0)
match_free(j->level0);
LIST_REMOVE(Match, matches, j->matches, m);
free(m->data);
free(m);
}
j->n_matches = 0;
j->level0 = j->level1 = NULL;
detach_location(j);
}
@ -319,158 +489,247 @@ static int compare_with_location(JournalFile *af, Object *ao, Location *l) {
return 0;
}
static int find_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
Object *o = NULL;
uint64_t p = 0;
static int next_for_match(
sd_journal *j,
Match *m,
JournalFile *f,
uint64_t after_offset,
direction_t direction,
Object **ret,
uint64_t *offset) {
int r;
uint64_t np = 0;
Object *n;
assert(j);
assert(m);
assert(f);
if (!j->matches) {
/* No matches is simple */
if (j->current_location.type == LOCATION_HEAD)
r = journal_file_next_entry(f, NULL, 0, DIRECTION_DOWN, &o, &p);
else if (j->current_location.type == LOCATION_TAIL)
r = journal_file_next_entry(f, NULL, 0, DIRECTION_UP, &o, &p);
else if (j->current_location.seqnum_set &&
sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
r = journal_file_move_to_entry_by_seqnum(f, j->current_location.seqnum, direction, &o, &p);
else if (j->current_location.monotonic_set) {
r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, &o, &p);
if (r == -ENOENT) {
/* boot id unknown in this file */
if (j->current_location.realtime_set)
r = journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, &o, &p);
else
r = journal_file_next_entry(f, NULL, 0, direction, &o, &p);
}
} else if (j->current_location.realtime_set)
r = journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, &o, &p);
else
r = journal_file_next_entry(f, NULL, 0, direction, &o, &p);
if (m->type == MATCH_DISCRETE) {
uint64_t dp;
r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), NULL, &dp);
if (r <= 0)
return r;
} else {
Match *m, *term_match = NULL;
Object *to = NULL;
uint64_t tp = 0;
return journal_file_move_to_entry_by_offset_for_data(f, dp, after_offset, direction, ret, offset);
/* We have matches, first, let's jump to the monotonic
* position if we have any, since it implies a
* match. */
} else if (m->type == MATCH_OR_TERM) {
Match *i;
if (j->current_location.type == LOCATION_DISCRETE &&
j->current_location.monotonic_set) {
/* Find the earliest match beyond after_offset */
r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, &o, &p);
if (r <= 0)
return r == -ENOENT ? 0 : r;
LIST_FOREACH(matches, i, m->matches) {
uint64_t cp;
r = next_for_match(j, i, f, after_offset, direction, NULL, &cp);
if (r < 0)
return r;
else if (r > 0) {
if (np == 0 || (direction == DIRECTION_DOWN ? np > cp : np < cp))
np = cp;
}
}
LIST_FOREACH(matches, m, j->matches) {
Object *c, *d;
uint64_t cp, dp;
} else if (m->type == MATCH_AND_TERM) {
Match *i;
bool continue_looking;
r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), &d, &dp);
/* Always jump to the next matching entry and repeat
* this until we fine and offset that matches for all
* matches. */
if (!m->matches)
return 0;
np = 0;
do {
continue_looking = false;
LIST_FOREACH(matches, i, m->matches) {
uint64_t cp, limit;
if (np == 0)
limit = after_offset;
else if (direction == DIRECTION_DOWN)
limit = MAX(np, after_offset);
else
limit = MIN(np, after_offset);
r = next_for_match(j, i, f, limit, direction, NULL, &cp);
if (r <= 0)
return r;
if (j->current_location.type == LOCATION_HEAD)
r = journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_DOWN, &c, &cp);
else if (j->current_location.type == LOCATION_TAIL)
r = journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_UP, &c, &cp);
else if (j->current_location.seqnum_set &&
sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
r = journal_file_move_to_entry_by_seqnum_for_data(f, dp, j->current_location.seqnum, direction, &c, &cp);
else if (j->current_location.realtime_set)
r = journal_file_move_to_entry_by_realtime_for_data(f, dp, j->current_location.realtime, direction, &c, &cp);
else
r = journal_file_next_entry_for_data(f, NULL, 0, dp, direction, &c, &cp);
if ((direction == DIRECTION_DOWN ? cp >= after_offset : cp <= after_offset) &&
(np == 0 || (direction == DIRECTION_DOWN ? cp > np : np < cp))) {
np = cp;
continue_looking = true;
}
}
} while (continue_looking);
}
if (np == 0)
return 0;
r = journal_file_move_to_object(f, OBJECT_ENTRY, np, &n);
if (r < 0)
return r;
if (!term_match) {
term_match = m;
if (r > 0) {
to = c;
tp = cp;
}
} else if (same_field(term_match->data, term_match->size, m->data, m->size)) {
/* Same field as previous match... */
if (r > 0) {
/* Find the earliest of the OR matches */
if (!to ||
(direction == DIRECTION_DOWN && cp < tp) ||
(direction == DIRECTION_UP && cp > tp)) {
to = c;
tp = cp;
}
}
} else {
/* Previous term is finished, did anything match? */
if (!to)
return 0;
/* Find the last of the AND matches */
if (!o ||
(direction == DIRECTION_DOWN && tp > p) ||
(direction == DIRECTION_UP && tp < p)) {
o = to;
p = tp;
}
term_match = m;
if (r > 0) {
to = c;
tp = cp;
} else {
to = NULL;
tp = 0;
}
}
}
/* Last term is finished, did anything match? */
if (!to)
return 0;
if (!o ||
(direction == DIRECTION_DOWN && tp > p) ||
(direction == DIRECTION_UP && tp < p)) {
o = to;
p = tp;
}
if (!o)
return 0;
}
if (ret)
*ret = o;
*ret = n;
if (offset)
*offset = p;
*offset = np;
return 1;
}
static int next_with_matches(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
static int find_location_for_match(
sd_journal *j,
Match *m,
JournalFile *f,
direction_t direction,
Object **ret,
uint64_t *offset) {
int r;
assert(j);
assert(m);
assert(f);
if (m->type == MATCH_DISCRETE) {
uint64_t dp;
r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), NULL, &dp);
if (r <= 0)
return r;
/* FIXME: missing: find by monotonic */
if (j->current_location.type == LOCATION_HEAD)
return journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_DOWN, ret, offset);
if (j->current_location.type == LOCATION_TAIL)
return journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_UP, ret, offset);
if (j->current_location.seqnum_set && sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
return journal_file_move_to_entry_by_seqnum_for_data(f, dp, j->current_location.seqnum, direction, ret, offset);
if (j->current_location.monotonic_set) {
r = journal_file_move_to_entry_by_monotonic_for_data(f, dp, j->current_location.boot_id, j->current_location.monotonic, direction, ret, offset);
if (r != -ENOENT)
return r;
}
if (j->current_location.realtime_set)
return journal_file_move_to_entry_by_realtime_for_data(f, dp, j->current_location.realtime, direction, ret, offset);
return journal_file_next_entry_for_data(f, NULL, 0, dp, direction, ret, offset);
} else if (m->type == MATCH_OR_TERM) {
uint64_t np = 0;
Object *n;
Match *i;
/* Find the earliest match */
LIST_FOREACH(matches, i, m->matches) {
uint64_t cp;
r = find_location_for_match(j, i, f, direction, NULL, &cp);
if (r < 0)
return r;
else if (r > 0) {
if (np == 0 || (direction == DIRECTION_DOWN ? np > cp : np < cp))
np = cp;
}
}
if (np == 0)
return 0;
r = journal_file_move_to_object(f, OBJECT_ENTRY, np, &n);
if (r < 0)
return r;
if (ret)
*ret = n;
if (offset)
*offset = np;
return 1;
} else {
Match *i;
uint64_t np = 0;
assert(m->type == MATCH_AND_TERM);
/* First jump to the last match, and then find the
* next one where all matches match */
if (!m->matches)
return 0;
LIST_FOREACH(matches, i, m->matches) {
uint64_t cp;
r = find_location_for_match(j, i, f, direction, NULL, &cp);
if (r <= 0)
return r;
if (np == 0 || (direction == DIRECTION_DOWN ? np < cp : np > cp))
np = cp;
}
return next_for_match(j, m, f, np, direction, ret, offset);
}
}
static int find_location_with_matches(
sd_journal *j,
JournalFile *f,
direction_t direction,
Object **ret,
uint64_t *offset) {
int r;
assert(j);
assert(f);
assert(ret);
assert(offset);
if (!j->level0) {
/* No matches is simple */
if (j->current_location.type == LOCATION_HEAD)
return journal_file_next_entry(f, NULL, 0, DIRECTION_DOWN, ret, offset);
if (j->current_location.type == LOCATION_TAIL)
return journal_file_next_entry(f, NULL, 0, DIRECTION_UP, ret, offset);
if (j->current_location.seqnum_set && sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
return journal_file_move_to_entry_by_seqnum(f, j->current_location.seqnum, direction, ret, offset);
if (j->current_location.monotonic_set) {
r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, ret, offset);
if (r != -ENOENT)
return r;
}
if (j->current_location.realtime_set)
return journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, ret, offset);
return journal_file_next_entry(f, NULL, 0, direction, ret, offset);
} else
return find_location_for_match(j, j->level0, f, direction, ret, offset);
}
static int next_with_matches(
sd_journal *j,
JournalFile *f,
direction_t direction,
Object **ret,
uint64_t *offset) {
Object *c;
uint64_t cp;
assert(j);
assert(f);
@ -480,129 +739,20 @@ static int next_with_matches(sd_journal *j, JournalFile *f, direction_t directio
c = *ret;
cp = *offset;
if (!j->matches) {
/* No matches is easy */
/* No matches is easy. We simple advance the file
* pointer by one. */
if (!j->level0)
return journal_file_next_entry(f, c, cp, direction, ret, offset);
r = journal_file_next_entry(f, c, cp, direction, &c, &cp);
if (r <= 0)
return r;
if (ret)
*ret = c;
if (offset)
*offset = cp;
return 1;
}
/* So there are matches we have to adhere to, let's find the
* first entry that matches all of them */
for (;;) {
uint64_t np, n;
bool found, term_result = false;
Match *m, *term_match = NULL;
Object *npo = NULL;
n = journal_file_entry_n_items(c);
/* Make sure we don't match the entry we are starting
* from. */
found = cp != *offset;
np = 0;
LIST_FOREACH(matches, m, j->matches) {
uint64_t q, k;
Object *qo = NULL;
/* Let's check if this is the beginning of a
* new term, i.e. has a different field prefix
* as the preceeding match. */
if (!term_match) {
term_match = m;
term_result = false;
} else if (!same_field(term_match->data, term_match->size, m->data, m->size)) {
if (!term_result)
found = false;
term_match = m;
term_result = false;
}
for (k = 0; k < n; k++)
if (c->entry.items[k].hash == m->le_hash)
break;
if (k >= n) {
/* Hmm, didn't find any field that
* matched this rule, so ignore this
* match. Go on with next match */
continue;
}
term_result = true;
/* Hmm, so, this field matched, let's remember
* where we'd have to try next, in case the other
* matches are not OK */
r = journal_file_next_entry_for_data(f, c, cp, le64toh(c->entry.items[k].object_offset), direction, &qo, &q);
/* This pointer is invalidated if the window was
* remapped. May need to re-fetch it later */
c = NULL;
if (r < 0)
return r;
if (r > 0) {
if (direction == DIRECTION_DOWN) {
if (q > np) {
np = q;
npo = qo;
}
} else {
if (np == 0 || q < np) {
np = q;
npo = qo;
}
}
}
}
/* Check the last term */
if (term_match && !term_result)
found = false;
/* Did this entry match against all matches? */
if (found) {
if (ret) {
if (c == NULL) {
/* Re-fetch the entry */
r = journal_file_move_to_object(f, OBJECT_ENTRY, cp, &c);
if (r < 0)
return r;
}
*ret = c;
}
if (offset)
*offset = cp;
return 1;
}
/* Did we find a subsequent entry? */
if (np == 0)
return 0;
/* Hmm, ok, this entry only matched partially, so
* let's try another one */
cp = np;
c = npo;
}
/* If we have a match then we look for the next matching entry
* wiht an offset at least one step larger */
return next_for_match(j, j->level0, f, direction == DIRECTION_DOWN ? cp+1 : cp-1, direction, ret, offset);
}
static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
Object *c;
uint64_t cp;
int compare_value, r;
int r;
assert(j);
assert(f);
@ -617,16 +767,18 @@ static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direc
r = next_with_matches(j, f, direction, &c, &cp);
if (r <= 0)
return r;
compare_value = 1;
} else {
r = find_location(j, f, direction, &c, &cp);
r = find_location_with_matches(j, f, direction, &c, &cp);
if (r <= 0)
return r;
compare_value = 0;
}
/* OK, we found the spot, now let's advance until to an entry
* that is actually different from what we were previously
* looking at. This is necessary to handle entries which exist
* in two (or more) journal files, and which shall all be
* suppressed but one. */
for (;;) {
bool found;
@ -635,9 +787,9 @@ static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direc
k = compare_with_location(f, c, &j->current_location);
if (direction == DIRECTION_DOWN)
found = k >= compare_value;
found = k > 0;
else
found = k <= -compare_value;
found = k < 0;
} else
found = true;

67
src/journal/test-journal-match.c Normal file
View File

@ -0,0 +1,67 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 <stdio.h>
#include <systemd/sd-journal.h>
#include "journal-internal.h"
#include "util.h"
#include "log.h"
int main(int argc, char *argv[]) {
sd_journal *j;
char *t;
log_set_max_level(LOG_DEBUG);
assert_se(sd_journal_open(&j, 0) >= 0);
assert_se(sd_journal_add_match(j, "foobar", 0) < 0);
assert_se(sd_journal_add_match(j, "foobar=waldo", 0) < 0);
assert_se(sd_journal_add_match(j, "", 0) < 0);
assert_se(sd_journal_add_match(j, "=", 0) < 0);
assert_se(sd_journal_add_match(j, "=xxxxx", 0) < 0);
assert_se(sd_journal_add_match(j, "HALLO=WALDO", 0) >= 0);
assert_se(sd_journal_add_match(j, "QUUX=mmmm", 0) >= 0);
assert_se(sd_journal_add_match(j, "QUUX=xxxxx", 0) >= 0);
assert_se(sd_journal_add_match(j, "HALLO=", 0) >= 0);
assert_se(sd_journal_add_match(j, "QUUX=xxxxx", 0) >= 0);
assert_se(sd_journal_add_match(j, "QUUX=yyyyy", 0) >= 0);
assert_se(sd_journal_add_match(j, "PIFF=paff", 0) >= 0);
assert_se(sd_journal_add_disjunction(j) >= 0);
assert_se(sd_journal_add_match(j, "ONE=one", 0) >= 0);
assert_se(sd_journal_add_match(j, "ONE=two", 0) >= 0);
assert_se(sd_journal_add_match(j, "TWO=two", 0) >= 0);
assert_se(t = journal_make_match_string(j));
assert_se(streq(t, "((TWO=two AND (ONE=two OR ONE=one)) OR (PIFF=paff AND (QUUX=yyyyy OR QUUX=xxxxx OR QUUX=mmmm) AND (HALLO= OR HALLO=WALDO)))"));
printf("resulting match expression is: %s\n", t);
free(t);
sd_journal_close(j);
return 0;
}

4
src/journal/test-journal-send.c
View File

@ -21,7 +21,11 @@
#include <systemd/sd-journal.h>
#include "log.h"
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
sd_journal_print(LOG_INFO, "piepapo");
sd_journal_send("MESSAGE=foobar",

169
src/journal/test-journal-stream.c Normal file
View File

@ -0,0 +1,169 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 <unistd.h>
#include <fcntl.h>
#include <systemd/sd-journal.h>
#include "journal-file.h"
#include "journal-internal.h"
#include "util.h"
#include "log.h"
#define N_ENTRIES 200
static void verify_contents(sd_journal *j, unsigned skip) {
unsigned i;
assert(j);
i = 0;
SD_JOURNAL_FOREACH(j) {
const void *d;
char *k;
size_t l;
unsigned u;
assert_se(sd_journal_get_cursor(j, &k) >= 0);
printf("cursor: %s\n", k);
free(k);
assert_se(sd_journal_get_data(j, "MAGIC", &d, &l) >= 0);
printf("\t%.*s\n", (int) l, (const char*) d);
assert_se(sd_journal_get_data(j, "NUMBER", &d, &l) >= 0);
assert_se(k = strndup(d, l));
printf("\t%s\n", k);
if (skip > 0) {
assert_se(safe_atou(k + 7, &u) >= 0);
assert_se(i == u);
i += skip;
}
free(k);
}
if (skip > 0)
assert_se(i == N_ENTRIES);
}
int main(int argc, char *argv[]) {
JournalFile *one, *two, *three;
char t[] = "/tmp/journal-stream-XXXXXX";
unsigned i;
sd_journal *j;
char *z;
log_set_max_level(LOG_DEBUG);
assert_se(mkdtemp(t));
assert_se(chdir(t) >= 0);
assert_se(journal_file_open("one.journal", O_RDWR|O_CREAT, 0666, NULL, &one) == 0);
assert_se(journal_file_open("two.journal", O_RDWR|O_CREAT, 0666, NULL, &two) == 0);
assert_se(journal_file_open("three.journal", O_RDWR|O_CREAT, 0666, NULL, &three) == 0);
for (i = 0; i < N_ENTRIES; i++) {
char *p, *q;
dual_timestamp ts;
struct iovec iovec[2];
dual_timestamp_get(&ts);
assert_se(asprintf(&p, "NUMBER=%u", i) >= 0);
iovec[0].iov_base = p;
iovec[0].iov_len = strlen(p);
assert_se(asprintf(&q, "MAGIC=%s", i % 5 == 0 ? "quux" : "waldo") >= 0);
iovec[1].iov_base = q;
iovec[1].iov_len = strlen(q);
if (i % 10 == 0)
assert_se(journal_file_append_entry(three, &ts, iovec, 2, NULL, NULL, NULL) == 0);
else {
if (i % 3 == 0)
assert_se(journal_file_append_entry(two, &ts, iovec, 2, NULL, NULL, NULL) == 0);
assert_se(journal_file_append_entry(one, &ts, iovec, 2, NULL, NULL, NULL) == 0);
}
free(p);
free(q);
}
journal_file_close(one);
journal_file_close(two);
journal_file_close(three);
assert_se(sd_journal_open_directory(&j, t, 0) >= 0);
assert_se(sd_journal_add_match(j, "MAGIC=quux", 0) >= 0);
SD_JOURNAL_FOREACH_BACKWARDS(j) {
const void *d;
size_t l;
assert_se(sd_journal_get_data(j, "NUMBER", &d, &l) >= 0);
printf("\t%.*s\n", (int) l, (const char*) d);
}
SD_JOURNAL_FOREACH(j) {
const void *d;
size_t l;
assert_se(sd_journal_get_data(j, "NUMBER", &d, &l) >= 0);
printf("\t%.*s\n", (int) l, (const char*) d);
}
sd_journal_flush_matches(j);
verify_contents(j, 1);
printf("NEXT TEST\n");
assert_se(sd_journal_add_match(j, "MAGIC=quux", 0) >= 0);
assert_se(z = journal_make_match_string(j));
printf("resulting match expression is: %s\n", z);
free(z);
verify_contents(j, 5);
printf("NEXT TEST\n");
sd_journal_flush_matches(j);
assert_se(sd_journal_add_match(j, "MAGIC=waldo", 0) >= 0);
assert_se(sd_journal_add_match(j, "NUMBER=10", 0) >= 0);
assert_se(sd_journal_add_match(j, "NUMBER=11", 0) >= 0);
assert_se(sd_journal_add_match(j, "NUMBER=12", 0) >= 0);
assert_se(z = journal_make_match_string(j));
printf("resulting match expression is: %s\n", z);
free(z);
verify_contents(j, 0);
sd_journal_close(j);
assert_se(rm_rf(t, false, true, false) >= 0);
return 0;
}

1
src/systemd/sd-journal.h
View File

@ -88,6 +88,7 @@ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *l);
void sd_journal_restart_data(sd_journal *j);
int sd_journal_add_match(sd_journal *j, const void *data, size_t size);
int sd_journal_add_disjunction(sd_journal *j);
void sd_journal_flush_matches(sd_journal *j);
int sd_journal_seek_head(sd_journal *j);