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-rw-r--r--src/journal/sd-journal.c138
1 files changed, 118 insertions, 20 deletions
diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
index d580b8e768..bc6d255662 100644
--- a/src/journal/sd-journal.c
+++ b/src/journal/sd-journal.c
@@ -28,13 +28,14 @@
#include "journal-file.h"
#include "hashmap.h"
#include "list.h"
+#include "lookup3.h"
typedef struct Match Match;
struct Match {
char *data;
size_t size;
- uint64_t hash;
+ uint64_t le_hash;
LIST_FIELDS(Match, matches);
};
@@ -46,6 +47,7 @@ struct sd_journal {
uint64_t current_field;
LIST_HEAD(Match, matches);
+ unsigned n_matches;
};
int sd_journal_add_match(sd_journal *j, const void *data, size_t size) {
@@ -71,8 +73,11 @@ int sd_journal_add_match(sd_journal *j, const void *data, size_t size) {
}
memcpy(m->data, data, size);
+ m->le_hash = hash64(m->data, size);
LIST_PREPEND(Match, matches, j->matches, m);
+ j->n_matches ++;
+
return 0;
}
@@ -86,6 +91,8 @@ void sd_journal_flush_matches(sd_journal *j) {
free(m->data);
free(m);
}
+
+ j->n_matches = 0;
}
static int compare_order(JournalFile *af, Object *ao, uint64_t ap,
@@ -155,6 +162,103 @@ static int compare_order(JournalFile *af, Object *ao, uint64_t ap,
return 0;
}
+static int move_to_next_with_matches(sd_journal *j, JournalFile *f, Object **o, uint64_t *p) {
+ int r;
+ uint64_t cp;
+ Object *c;
+
+ assert(j);
+ assert(f);
+ assert(o);
+ assert(p);
+
+ if (!j->matches) {
+ /* No matches is easy, just go on to the next entry */
+
+ if (f->current_offset > 0) {
+ r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &c);
+ if (r < 0)
+ return r;
+ } else
+ c = NULL;
+
+ return journal_file_next_entry(f, c, o, p);
+ }
+
+ /* So there are matches we have to adhere to, let's find the
+ * first entry that matches all of them */
+
+ if (f->current_offset > 0)
+ cp = f->current_offset;
+ else {
+ r = journal_file_find_first_entry(f, j->matches->data, j->matches->size, &c, &cp);
+ if (r <= 0)
+ return r;
+
+ /* We can shortcut this if there's only one match */
+ if (j->n_matches == 1) {
+ *o = c;
+ *p = cp;
+ return r;
+ }
+ }
+
+ for (;;) {
+ uint64_t np, n;
+ bool found;
+ Match *m;
+
+ r = journal_file_move_to_object(f, cp, OBJECT_ENTRY, &c);
+ if (r < 0)
+ return r;
+
+ n = journal_file_entry_n_items(c);
+
+ /* Make sure we don't match the entry we are starting
+ * from. */
+ found = f->current_offset != cp;
+
+ np = 0;
+ LIST_FOREACH(matches, m, j->matches) {
+ uint64_t q, k;
+
+ 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, so ignore
+ * this match. Go on with next match */
+
+ found = false;
+ continue;
+ }
+
+ /* Hmm, so, this field matched, let's remember
+ * where we'd have to try next, in case the other
+ * matches are not OK */
+ q = le64toh(c->entry.items[k].next_entry_offset);
+ if (q > np)
+ np = q;
+ }
+
+ /* Did this entry match against all matches? */
+ if (found) {
+ *o = c;
+ *p = 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;
+ }
+}
+
int sd_journal_next(sd_journal *j) {
JournalFile *f, *new_current = NULL;
Iterator i;
@@ -168,14 +272,7 @@ int sd_journal_next(sd_journal *j) {
Object *o;
uint64_t p;
- if (f->current_offset > 0) {
- r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
- if (r < 0)
- return r;
- } else
- o = NULL;
-
- r = journal_file_next_entry(f, o, &o, &p);
+ r = move_to_next_with_matches(j, f, &o, &p);
if (r < 0)
return r;
else if (r == 0)
@@ -203,14 +300,7 @@ int sd_journal_next(sd_journal *j) {
if (j->current_file == f)
continue;
- if (f->current_offset > 0) {
- r = journal_file_move_to_object(f, f->current_offset, OBJECT_ENTRY, &o);
- if (r < 0)
- return r;
- } else
- o = NULL;
-
- r = journal_file_next_entry(f, o, &o, &p);
+ r = move_to_next_with_matches(j, f, &o, &p);
if (r < 0)
return r;
else if (r == 0)
@@ -532,7 +622,7 @@ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret) {
if (f->current_offset <= 0)
return 0;
- r = sd_id128_get_machine(&id);
+ r = sd_id128_get_boot(&id);
if (r < 0)
return r;
@@ -578,14 +668,18 @@ int sd_journal_get_field(sd_journal *j, const char *field, const void **data, si
n = journal_file_entry_n_items(o);
for (i = 0; i < n; i++) {
- uint64_t p, l;
+ uint64_t p, l, h;
size_t t;
p = le64toh(o->entry.items[i].object_offset);
+ h = o->entry.items[j->current_field].hash;
r = journal_file_move_to_object(f, p, OBJECT_DATA, &o);
if (r < 0)
return r;
+ if (h != o->data.hash)
+ return -EBADMSG;
+
l = le64toh(o->object.size) - offsetof(Object, data.payload);
if (l >= field_length+1 &&
@@ -613,7 +707,7 @@ int sd_journal_get_field(sd_journal *j, const char *field, const void **data, si
int sd_journal_iterate_fields(sd_journal *j, const void **data, size_t *size) {
JournalFile *f;
- uint64_t p, l, n;
+ uint64_t p, l, n, h;
size_t t;
int r;
Object *o;
@@ -638,10 +732,14 @@ int sd_journal_iterate_fields(sd_journal *j, const void **data, size_t *size) {
return 0;
p = le64toh(o->entry.items[j->current_field].object_offset);
+ h = o->entry.items[j->current_field].hash;
r = journal_file_move_to_object(f, p, OBJECT_DATA, &o);
if (r < 0)
return r;
+ if (h != o->data.hash)
+ return -EBADMSG;
+
l = le64toh(o->object.size) - offsetof(Object, data.payload);
t = (size_t) l;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-16 17:10:10 +0000