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-rw-r--r--src/journal/journal-file.c219
1 files changed, 187 insertions, 32 deletions
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 9665a0535b..0aada9c419 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -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);
@@ -1279,33 +1288,77 @@ 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;
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o);
- if (r < 0)
- return r;
+ /* 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 (ret)
- *ret = o;
-
- if (offset)
- *offset = extra;
-
- if (idx)
- *idx = 0;
-
- return 1;
+ 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;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = extra;
+
+ if (idx)
+ *idx = 0;
+
+ return 1;
+}
+
+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,
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-08-14 18:04:22 +0000