]> git.ipfire.org Git - thirdparty/systemd.git/blobdiff - src/journal/journal-verify.c
dns-domain: add code for verifying validity of DNS-SD service names and types
[thirdparty/systemd.git] / src / journal / journal-verify.c
index ed28b457372813e689a09ad0cc9ed4244d6420c3..715847e0184c243db69f9921380913c30325d458 100644 (file)
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <unistd.h>
-#include <sys/mman.h>
 #include <fcntl.h>
 #include <stddef.h>
+#include <sys/mman.h>
+#include <unistd.h>
 
-#include "util.h"
-#include "macro.h"
+#include "alloc-util.h"
+#include "compress.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "journal-authenticate.h"
 #include "journal-def.h"
 #include "journal-file.h"
-#include "journal-authenticate.h"
 #include "journal-verify.h"
 #include "lookup3.h"
-#include "compress.h"
-#include "fsprg.h"
+#include "macro.h"
+#include "terminal-util.h"
+#include "util.h"
+
+static void draw_progress(uint64_t p, usec_t *last_usec) {
+        unsigned n, i, j, k;
+        usec_t z, x;
+
+        if (!on_tty())
+                return;
+
+        z = now(CLOCK_MONOTONIC);
+        x = *last_usec;
+
+        if (x != 0 && x + 40 * USEC_PER_MSEC > z)
+                return;
 
-static int journal_file_object_verify(JournalFile *f, Object *o) {
+        *last_usec = z;
+
+        n = (3 * columns()) / 4;
+        j = (n * (unsigned) p) / 65535ULL;
+        k = n - j;
+
+        fputs("\r\x1B[?25l" ANSI_HIGHLIGHT_GREEN, stdout);
+
+        for (i = 0; i < j; i++)
+                fputs("\xe2\x96\x88", stdout);
+
+        fputs(ANSI_NORMAL, stdout);
+
+        for (i = 0; i < k; i++)
+                fputs("\xe2\x96\x91", stdout);
+
+        printf(" %3"PRIu64"%%", 100U * p / 65535U);
+
+        fputs("\r\x1B[?25h", stdout);
+        fflush(stdout);
+}
+
+static uint64_t scale_progress(uint64_t scale, uint64_t p, uint64_t m) {
+
+        /* Calculates scale * p / m, but handles m == 0 safely, and saturates */
+
+        if (p >= m || m == 0)
+                return scale;
+
+        return scale * p / m;
+}
+
+static void flush_progress(void) {
+        unsigned n, i;
+
+        if (!on_tty())
+                return;
+
+        n = (3 * columns()) / 4;
+
+        putchar('\r');
+
+        for (i = 0; i < n + 5; i++)
+                putchar(' ');
+
+        putchar('\r');
+        fflush(stdout);
+}
+
+#define debug(_offset, _fmt, ...) do{                                   \
+                flush_progress();                                       \
+                log_debug(OFSfmt": " _fmt, _offset, ##__VA_ARGS__);     \
+        } while(0)
+
+#define warning(_offset, _fmt, ...) do{                                 \
+                flush_progress();                                       \
+                log_warning(OFSfmt": " _fmt, _offset, ##__VA_ARGS__);   \
+        } while(0)
+
+#define error(_offset, _fmt, ...) do{                                   \
+                flush_progress();                                       \
+                log_error(OFSfmt": " _fmt, (uint64_t)_offset, ##__VA_ARGS__); \
+        } while(0)
+
+static int journal_file_object_verify(JournalFile *f, uint64_t offset, Object *o) {
         uint64_t i;
 
         assert(f);
+        assert(offset);
         assert(o);
 
         /* This does various superficial tests about the length an
          * possible field values. It does not follow any references to
          * other objects. */
 
-        if ((o->object.flags & OBJECT_COMPRESSED) &&
-            o->object.type != OBJECT_DATA)
+        if ((o->object.flags & OBJECT_COMPRESSED_XZ) &&
+            o->object.type != OBJECT_DATA) {
+                error(offset, "Found compressed object that isn't of type DATA, which is not allowed.");
                 return -EBADMSG;
+        }
 
         switch (o->object.type) {
 
         case OBJECT_DATA: {
                 uint64_t h1, h2;
+                int compression, r;
+
+                if (le64toh(o->data.entry_offset) == 0)
+                        warning(offset, "Unused data (entry_offset==0)");
 
-                if (le64toh(o->data.entry_offset) <= 0 ||
-                    le64toh(o->data.n_entries) <= 0)
+                if ((le64toh(o->data.entry_offset) == 0) ^ (le64toh(o->data.n_entries) == 0)) {
+                        error(offset, "Bad n_entries: %"PRIu64, o->data.n_entries);
                         return -EBADMSG;
+                }
 
-                if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0)
+                if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0) {
+                        error(offset, "Bad object size (<= %zu): %"PRIu64,
+                              offsetof(DataObject, payload),
+                              le64toh(o->object.size));
                         return -EBADMSG;
+                }
 
                 h1 = le64toh(o->data.hash);
 
-                if (o->object.flags & OBJECT_COMPRESSED) {
-#ifdef HAVE_XZ
-                        void *b = NULL;
-                        uint64_t alloc = 0, b_size;
-
-                        if (!uncompress_blob(o->data.payload,
-                                             le64toh(o->object.size) - offsetof(Object, data.payload),
-                                             &b, &alloc, &b_size, 0))
-                                return -EBADMSG;
+                compression = o->object.flags & OBJECT_COMPRESSION_MASK;
+                if (compression) {
+                        _cleanup_free_ void *b = NULL;
+                        size_t alloc = 0, b_size;
+
+                        r = decompress_blob(compression,
+                                            o->data.payload,
+                                            le64toh(o->object.size) - offsetof(Object, data.payload),
+                                            &b, &alloc, &b_size, 0);
+                        if (r < 0) {
+                                error(offset, "%s decompression failed: %s",
+                                      object_compressed_to_string(compression), strerror(-r));
+                                return r;
+                        }
 
                         h2 = hash64(b, b_size);
-                        free(b);
-#else
-                        return -EPROTONOSUPPORT;
-#endif
                 } else
                         h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload));
 
-                if (h1 != h2)
+                if (h1 != h2) {
+                        error(offset, "Invalid hash (%08"PRIx64" vs. %08"PRIx64, h1, h2);
                         return -EBADMSG;
+                }
 
                 if (!VALID64(o->data.next_hash_offset) ||
                     !VALID64(o->data.next_field_offset) ||
                     !VALID64(o->data.entry_offset) ||
-                    !VALID64(o->data.entry_array_offset))
+                    !VALID64(o->data.entry_array_offset)) {
+                        error(offset, "Invalid offset (next_hash_offset="OFSfmt", next_field_offset="OFSfmt", entry_offset="OFSfmt", entry_array_offset="OFSfmt,
+                              o->data.next_hash_offset,
+                              o->data.next_field_offset,
+                              o->data.entry_offset,
+                              o->data.entry_array_offset);
                         return -EBADMSG;
+                }
 
                 break;
         }
 
         case OBJECT_FIELD:
-                if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0)
+                if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0) {
+                        error(offset,
+                              "Bad field size (<= %zu): %"PRIu64,
+                              offsetof(FieldObject, payload),
+                              le64toh(o->object.size));
                         return -EBADMSG;
+                }
 
                 if (!VALID64(o->field.next_hash_offset) ||
-                    !VALID64(o->field.head_data_offset))
+                    !VALID64(o->field.head_data_offset)) {
+                        error(offset,
+                              "Invalid offset (next_hash_offset="OFSfmt", head_data_offset="OFSfmt,
+                              o->field.next_hash_offset,
+                              o->field.head_data_offset);
                         return -EBADMSG;
+                }
                 break;
 
         case OBJECT_ENTRY:
-                if ((le64toh(o->object.size) - offsetof(EntryObject, items)) % sizeof(EntryItem) != 0)
+                if ((le64toh(o->object.size) - offsetof(EntryObject, items)) % sizeof(EntryItem) != 0) {
+                        error(offset,
+                              "Bad entry size (<= %zu): %"PRIu64,
+                              offsetof(EntryObject, items),
+                              le64toh(o->object.size));
+                        return -EBADMSG;
+                }
+
+                if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0) {
+                        error(offset,
+                              "Invalid number items in entry: %"PRIu64,
+                              (le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem));
+                        return -EBADMSG;
+                }
+
+                if (le64toh(o->entry.seqnum) <= 0) {
+                        error(offset,
+                              "Invalid entry seqnum: %"PRIx64,
+                              le64toh(o->entry.seqnum));
                         return -EBADMSG;
+                }
 
-                if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0)
+                if (!VALID_REALTIME(le64toh(o->entry.realtime))) {
+                        error(offset,
+                              "Invalid entry realtime timestamp: %"PRIu64,
+                              le64toh(o->entry.realtime));
                         return -EBADMSG;
+                }
 
-                if (le64toh(o->entry.seqnum) <= 0 ||
-                    !VALID_REALTIME(le64toh(o->entry.realtime)) ||
-                    !VALID_MONOTONIC(le64toh(o->entry.monotonic)))
+                if (!VALID_MONOTONIC(le64toh(o->entry.monotonic))) {
+                        error(offset,
+                              "Invalid entry monotonic timestamp: %"PRIu64,
+                              le64toh(o->entry.monotonic));
                         return -EBADMSG;
+                }
 
                 for (i = 0; i < journal_file_entry_n_items(o); i++) {
                         if (o->entry.items[i].object_offset == 0 ||
-                            !VALID64(o->entry.items[i].object_offset))
+                            !VALID64(o->entry.items[i].object_offset)) {
+                                error(offset,
+                                      "Invalid entry item (%"PRIu64"/%"PRIu64" offset: "OFSfmt,
+                                      i, journal_file_entry_n_items(o),
+                                      o->entry.items[i].object_offset);
                                 return -EBADMSG;
+                        }
                 }
 
                 break;
 
         case OBJECT_DATA_HASH_TABLE:
         case OBJECT_FIELD_HASH_TABLE:
-                if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) % sizeof(HashItem) != 0)
-                        return -EBADMSG;
-
-                if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0)
+                if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) % sizeof(HashItem) != 0 ||
+                    (le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0) {
+                        error(offset,
+                              "Invalid %s hash table size: %"PRIu64,
+                              o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+                              le64toh(o->object.size));
                         return -EBADMSG;
+                }
 
                 for (i = 0; i < journal_file_hash_table_n_items(o); i++) {
                         if (o->hash_table.items[i].head_hash_offset != 0 &&
-                            !VALID64(le64toh(o->hash_table.items[i].head_hash_offset)))
+                            !VALID64(le64toh(o->hash_table.items[i].head_hash_offset))) {
+                                error(offset,
+                                      "Invalid %s hash table item (%"PRIu64"/%"PRIu64") head_hash_offset: "OFSfmt,
+                                      o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+                                      i, journal_file_hash_table_n_items(o),
+                                      le64toh(o->hash_table.items[i].head_hash_offset));
                                 return -EBADMSG;
+                        }
                         if (o->hash_table.items[i].tail_hash_offset != 0 &&
-                            !VALID64(le64toh(o->hash_table.items[i].tail_hash_offset)))
+                            !VALID64(le64toh(o->hash_table.items[i].tail_hash_offset))) {
+                                error(offset,
+                                      "Invalid %s hash table item (%"PRIu64"/%"PRIu64") tail_hash_offset: "OFSfmt,
+                                      o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+                                      i, journal_file_hash_table_n_items(o),
+                                      le64toh(o->hash_table.items[i].tail_hash_offset));
                                 return -EBADMSG;
+                        }
 
                         if ((o->hash_table.items[i].head_hash_offset != 0) !=
-                            (o->hash_table.items[i].tail_hash_offset != 0))
+                            (o->hash_table.items[i].tail_hash_offset != 0)) {
+                                error(offset,
+                                      "Invalid %s hash table item (%"PRIu64"/%"PRIu64"): head_hash_offset="OFSfmt" tail_hash_offset="OFSfmt,
+                                      o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+                                      i, journal_file_hash_table_n_items(o),
+                                      le64toh(o->hash_table.items[i].head_hash_offset),
+                                      le64toh(o->hash_table.items[i].tail_hash_offset));
                                 return -EBADMSG;
+                        }
                 }
 
                 break;
 
         case OBJECT_ENTRY_ARRAY:
-                if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) % sizeof(le64_t) != 0)
-                        return -EBADMSG;
-
-                if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0)
+                if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) % sizeof(le64_t) != 0 ||
+                    (le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0) {
+                        error(offset,
+                              "Invalid object entry array size: %"PRIu64,
+                              le64toh(o->object.size));
                         return -EBADMSG;
+                }
 
-                if (!VALID64(o->entry_array.next_entry_array_offset))
+                if (!VALID64(o->entry_array.next_entry_array_offset)) {
+                        error(offset,
+                              "Invalid object entry array next_entry_array_offset: "OFSfmt,
+                              o->entry_array.next_entry_array_offset);
                         return -EBADMSG;
+                }
 
                 for (i = 0; i < journal_file_entry_array_n_items(o); i++)
-                        if (o->entry_array.items[i] != 0 &&
-                            !VALID64(o->entry_array.items[i]))
+                        if (le64toh(o->entry_array.items[i]) != 0 &&
+                            !VALID64(le64toh(o->entry_array.items[i]))) {
+                                error(offset,
+                                      "Invalid object entry array item (%"PRIu64"/%"PRIu64"): "OFSfmt,
+                                      i, journal_file_entry_array_n_items(o),
+                                      le64toh(o->entry_array.items[i]));
                                 return -EBADMSG;
+                        }
 
                 break;
 
         case OBJECT_TAG:
-                if (le64toh(o->object.size) != sizeof(TagObject))
+                if (le64toh(o->object.size) != sizeof(TagObject)) {
+                        error(offset,
+                              "Invalid object tag size: %"PRIu64,
+                              le64toh(o->object.size));
                         return -EBADMSG;
+                }
 
-                if (!VALID_EPOCH(o->tag.epoch))
+                if (!VALID_EPOCH(o->tag.epoch)) {
+                        error(offset,
+                              "Invalid object tag epoch: %"PRIu64,
+                              o->tag.epoch);
                         return -EBADMSG;
+                }
 
                 break;
         }
@@ -174,58 +356,6 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
         return 0;
 }
 
-static void draw_progress(uint64_t p, usec_t *last_usec) {
-        unsigned n, i, j, k;
-        usec_t z, x;
-
-        if (!on_tty())
-                return;
-
-        z = now(CLOCK_MONOTONIC);
-        x = *last_usec;
-
-        if (x != 0 && x + 40 * USEC_PER_MSEC > z)
-                return;
-
-        *last_usec = z;
-
-        n = (3 * columns()) / 4;
-        j = (n * (unsigned) p) / 65535ULL;
-        k = n - j;
-
-        fputs("\r\x1B[?25l" ANSI_HIGHLIGHT_GREEN_ON, stdout);
-
-        for (i = 0; i < j; i++)
-                fputs("\xe2\x96\x88", stdout);
-
-        fputs(ANSI_HIGHLIGHT_OFF, stdout);
-
-        for (i = 0; i < k; i++)
-                fputs("\xe2\x96\x91", stdout);
-
-        printf(" %3lu%%", 100LU * (unsigned long) p / 65535LU);
-
-        fputs("\r\x1B[?25h", stdout);
-        fflush(stdout);
-}
-
-static void flush_progress(void) {
-        unsigned n, i;
-
-        if (!on_tty())
-                return;
-
-        n = (3 * columns()) / 4;
-
-        putchar('\r');
-
-        for (i = 0; i < n + 5; i++)
-                putchar(' ');
-
-        putchar('\r');
-        fflush(stdout);
-}
-
 static int write_uint64(int fd, uint64_t p) {
         ssize_t k;
 
@@ -288,7 +418,7 @@ static int entry_points_to_data(
         assert(entry_fd >= 0);
 
         if (!contains_uint64(f->mmap, entry_fd, n_entries, entry_p)) {
-                log_error("Data object references invalid entry at %llu", (unsigned long long) data_p);
+                error(data_p, "Data object references invalid entry at "OFSfmt, entry_p);
                 return -EBADMSG;
         }
 
@@ -304,13 +434,13 @@ static int entry_points_to_data(
                 }
 
         if (!found) {
-                log_error("Data object not referenced by linked entry at %llu", (unsigned long long) data_p);
+                error(entry_p, "Data object at "OFSfmt" not referenced by linked entry", data_p);
                 return -EBADMSG;
         }
 
         /* Check if this entry is also in main entry array. Since the
          * main entry array has already been verified we can rely on
-         * its consistency.*/
+         * its consistency. */
 
         i = 0;
         n = le64toh(f->header->n_entries);
@@ -347,7 +477,7 @@ static int entry_points_to_data(
                                         x = z;
                         }
 
-                        log_error("Entry object doesn't exist in main entry array at %llu", (unsigned long long) entry_p);
+                        error(entry_p, "Entry object doesn't exist in main entry array");
                         return -EBADMSG;
                 }
 
@@ -375,8 +505,17 @@ static int verify_data(
         n = le64toh(o->data.n_entries);
         a = le64toh(o->data.entry_array_offset);
 
-        /* We already checked this earlier */
-        assert(n > 0);
+        /* Entry array means at least two objects */
+        if (a && n < 2) {
+                error(p, "Entry array present (entry_array_offset="OFSfmt", but n_entries=%"PRIu64")", a, n);
+                return -EBADMSG;
+        }
+
+        if (n == 0)
+                return 0;
+
+        /* We already checked that earlier */
+        assert(o->data.entry_offset);
 
         last = q = le64toh(o->data.entry_offset);
         r = entry_points_to_data(f, entry_fd, n_entries, q, p);
@@ -388,12 +527,12 @@ static int verify_data(
                 uint64_t next, m, j;
 
                 if (a == 0) {
-                        log_error("Array chain too short at %llu", (unsigned long long) p);
+                        error(p, "Array chain too short");
                         return -EBADMSG;
                 }
 
                 if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) {
-                        log_error("Invalid array at %llu", (unsigned long long) p);
+                        error(p, "Invalid array offset "OFSfmt, a);
                         return -EBADMSG;
                 }
 
@@ -403,7 +542,7 @@ static int verify_data(
 
                 next = le64toh(o->entry_array.next_entry_array_offset);
                 if (next != 0 && next <= a) {
-                        log_error("Array chain has cycle at %llu", (unsigned long long) p);
+                        error(p, "Array chain has cycle (jumps back from "OFSfmt" to "OFSfmt")", a, next);
                         return -EBADMSG;
                 }
 
@@ -412,7 +551,7 @@ static int verify_data(
 
                         q = le64toh(o->entry_array.items[j]);
                         if (q <= last) {
-                                log_error("Data object's entry array not sorted at %llu", (unsigned long long) p);
+                                error(p, "Data object's entry array not sorted");
                                 return -EBADMSG;
                         }
                         last = q;
@@ -451,11 +590,18 @@ static int verify_hash_table(
         assert(last_usec);
 
         n = le64toh(f->header->data_hash_table_size) / sizeof(HashItem);
+        if (n <= 0)
+                return 0;
+
+        r = journal_file_map_data_hash_table(f);
+        if (r < 0)
+                return log_error_errno(r, "Failed to map data hash table: %m");
+
         for (i = 0; i < n; i++) {
                 uint64_t last = 0, p;
 
                 if (show_progress)
-                        draw_progress(0xC000 + (0x3FFF * i / n), last_usec);
+                        draw_progress(0xC000 + scale_progress(0x3FFF, i, n), last_usec);
 
                 p = le64toh(f->data_hash_table[i].head_hash_offset);
                 while (p != 0) {
@@ -463,8 +609,7 @@ static int verify_hash_table(
                         uint64_t next;
 
                         if (!contains_uint64(f->mmap, data_fd, n_data, p)) {
-                                log_error("Invalid data object at hash entry %llu of %llu",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                error(p, "Invalid data object at hash entry %"PRIu64" of %"PRIu64, i, n);
                                 return -EBADMSG;
                         }
 
@@ -474,14 +619,12 @@ static int verify_hash_table(
 
                         next = le64toh(o->data.next_hash_offset);
                         if (next != 0 && next <= p) {
-                                log_error("Hash chain has a cycle in hash entry %llu of %llu",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                error(p, "Hash chain has a cycle in hash entry %"PRIu64" of %"PRIu64, i, n);
                                 return -EBADMSG;
                         }
 
                         if (le64toh(o->data.hash) % n != i) {
-                                log_error("Hash value mismatch in hash entry %llu of %llu",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                error(p, "Hash value mismatch in hash entry %"PRIu64" of %"PRIu64, i, n);
                                 return -EBADMSG;
                         }
 
@@ -494,7 +637,7 @@ static int verify_hash_table(
                 }
 
                 if (last != le64toh(f->data_hash_table[i].tail_hash_offset)) {
-                        log_error("Tail hash pointer mismatch in hash table");
+                        error(p, "Tail hash pointer mismatch in hash table");
                         return -EBADMSG;
                 }
         }
@@ -508,6 +651,13 @@ static int data_object_in_hash_table(JournalFile *f, uint64_t hash, uint64_t p)
         assert(f);
 
         n = le64toh(f->header->data_hash_table_size) / sizeof(HashItem);
+        if (n <= 0)
+                return 0;
+
+        r = journal_file_map_data_hash_table(f);
+        if (r < 0)
+                return log_error_errno(r, "Failed to map data hash table: %m");
+
         h = hash % n;
 
         q = le64toh(f->data_hash_table[h].head_hash_offset);
@@ -548,18 +698,16 @@ static int verify_entry(
                 h = le64toh(o->entry.items[i].hash);
 
                 if (!contains_uint64(f->mmap, data_fd, n_data, q)) {
-                        log_error("Invalid data object at entry %llu",
-                                  (unsigned long long) p);
-                                return -EBADMSG;
-                        }
+                        error(p, "Invalid data object of entry");
+                        return -EBADMSG;
+                }
 
                 r = journal_file_move_to_object(f, OBJECT_DATA, q, &u);
                 if (r < 0)
                         return r;
 
                 if (le64toh(u->data.hash) != h) {
-                        log_error("Hash mismatch for data object at entry %llu",
-                                  (unsigned long long) p);
+                        error(p, "Hash mismatch for data object of entry");
                         return -EBADMSG;
                 }
 
@@ -567,8 +715,7 @@ static int verify_entry(
                 if (r < 0)
                         return r;
                 if (r == 0) {
-                        log_error("Data object missing from hash at entry %llu",
-                                  (unsigned long long) p);
+                        error(p, "Data object missing from hash table");
                         return -EBADMSG;
                 }
         }
@@ -600,17 +747,15 @@ static int verify_entry_array(
                 Object *o;
 
                 if (show_progress)
-                        draw_progress(0x8000 + (0x3FFF * i / n), last_usec);
+                        draw_progress(0x8000 + scale_progress(0x3FFF, i, n), last_usec);
 
                 if (a == 0) {
-                        log_error("Array chain too short at %llu of %llu",
-                                  (unsigned long long) i, (unsigned long long) n);
+                        error(a, "Array chain too short at %"PRIu64" of %"PRIu64, i, n);
                         return -EBADMSG;
                 }
 
                 if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) {
-                        log_error("Invalid array at %llu of %llu",
-                                  (unsigned long long) i, (unsigned long long) n);
+                        error(a, "Invalid array %"PRIu64" of %"PRIu64, i, n);
                         return -EBADMSG;
                 }
 
@@ -620,8 +765,7 @@ static int verify_entry_array(
 
                 next = le64toh(o->entry_array.next_entry_array_offset);
                 if (next != 0 && next <= a) {
-                        log_error("Array chain has cycle at %llu of %llu",
-                                  (unsigned long long) i, (unsigned long long) n);
+                        error(a, "Array chain has cycle at %"PRIu64" of %"PRIu64" (jumps back from to "OFSfmt")", i, n, next);
                         return -EBADMSG;
                 }
 
@@ -631,15 +775,13 @@ static int verify_entry_array(
 
                         p = le64toh(o->entry_array.items[j]);
                         if (p <= last) {
-                                log_error("Entry array not sorted at %llu of %llu",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                error(a, "Entry array not sorted at %"PRIu64" of %"PRIu64, i, n);
                                 return -EBADMSG;
                         }
                         last = p;
 
                         if (!contains_uint64(f->mmap, entry_fd, n_entries, p)) {
-                                log_error("Invalid array entry at %llu of %llu",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                error(a, "Invalid array entry at %"PRIu64" of %"PRIu64, i, n);
                                 return -EBADMSG;
                         }
 
@@ -678,11 +820,8 @@ int journal_file_verify(
         uint64_t n_weird = 0, n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0, n_tags = 0;
         usec_t last_usec = 0;
         int data_fd = -1, entry_fd = -1, entry_array_fd = -1;
-        char data_path[] = "/var/tmp/journal-data-XXXXXX",
-                entry_path[] = "/var/tmp/journal-entry-XXXXXX",
-                entry_array_path[] = "/var/tmp/journal-entry-array-XXXXXX";
         unsigned i;
-        bool found_last;
+        bool found_last = false;
 #ifdef HAVE_GCRYPT
         uint64_t last_tag = 0;
 #endif
@@ -696,49 +835,39 @@ int journal_file_verify(
                         return r;
                 }
 #else
-                return -ENOTSUP;
+                return -EOPNOTSUPP;
 #endif
         } else if (f->seal)
                 return -ENOKEY;
 
-        data_fd = mkostemp(data_path, O_CLOEXEC);
+        data_fd = open_tmpfile("/var/tmp", O_RDWR | O_CLOEXEC);
         if (data_fd < 0) {
-                log_error("Failed to create data file: %m");
-                r = -errno;
+                r = log_error_errno(data_fd, "Failed to create data file: %m");
                 goto fail;
         }
-        unlink(data_path);
 
-        entry_fd = mkostemp(entry_path, O_CLOEXEC);
+        entry_fd = open_tmpfile("/var/tmp", O_RDWR | O_CLOEXEC);
         if (entry_fd < 0) {
-                log_error("Failed to create entry file: %m");
-                r = -errno;
+                r = log_error_errno(entry_fd, "Failed to create entry file: %m");
                 goto fail;
         }
-        unlink(entry_path);
 
-        entry_array_fd = mkostemp(entry_array_path, O_CLOEXEC);
+        entry_array_fd = open_tmpfile("/var/tmp", O_RDWR | O_CLOEXEC);
         if (entry_array_fd < 0) {
-                log_error("Failed to create entry array file: %m");
-                r = -errno;
+                r = log_error_errno(entry_array_fd,
+                                    "Failed to create entry array file: %m");
                 goto fail;
         }
-        unlink(entry_array_path);
 
-#ifdef HAVE_GCRYPT
-        if ((le32toh(f->header->compatible_flags) & ~HEADER_COMPATIBLE_SEALED) != 0)
-#else
-        if (f->header->compatible_flags != 0)
-#endif
-        {
+        if (le32toh(f->header->compatible_flags) & ~HEADER_COMPATIBLE_SUPPORTED) {
                 log_error("Cannot verify file with unknown extensions.");
-                r = -ENOTSUP;
+                r = -EOPNOTSUPP;
                 goto fail;
         }
 
         for (i = 0; i < sizeof(f->header->reserved); i++)
                 if (f->header->reserved[i] != 0) {
-                        log_error("Reserved field in non-zero.");
+                        error(offsetof(Header, reserved[i]), "Reserved field is non-zero");
                         r = -EBADMSG;
                         goto fail;
                 }
@@ -747,35 +876,49 @@ int journal_file_verify(
          * superficial structure, headers, hashes. */
 
         p = le64toh(f->header->header_size);
-        while (p != 0) {
+        for (;;) {
+                /* Early exit if there are no objects in the file, at all */
+                if (le64toh(f->header->tail_object_offset) == 0)
+                        break;
+
                 if (show_progress)
-                        draw_progress(0x7FFF * p / le64toh(f->header->tail_object_offset), &last_usec);
+                        draw_progress(scale_progress(0x7FFF, p, le64toh(f->header->tail_object_offset)), &last_usec);
 
-                r = journal_file_move_to_object(f, -1, p, &o);
+                r = journal_file_move_to_object(f, OBJECT_UNUSED, p, &o);
                 if (r < 0) {
-                        log_error("Invalid object at %llu", (unsigned long long) p);
+                        error(p, "Invalid object");
                         goto fail;
                 }
 
                 if (p > le64toh(f->header->tail_object_offset)) {
-                        log_error("Invalid tail object pointer");
+                        error(offsetof(Header, tail_object_offset), "Invalid tail object pointer");
                         r = -EBADMSG;
                         goto fail;
                 }
 
-                if (p == le64toh(f->header->tail_object_offset))
-                        found_last = true;
-
                 n_objects ++;
 
-                r = journal_file_object_verify(f, o);
+                r = journal_file_object_verify(f, p, o);
                 if (r < 0) {
-                        log_error("Invalid object contents at %llu", (unsigned long long) p);
+                        error(p, "Invalid object contents: %s", strerror(-r));
+                        goto fail;
+                }
+
+                if ((o->object.flags & OBJECT_COMPRESSED_XZ) &&
+                    (o->object.flags & OBJECT_COMPRESSED_LZ4)) {
+                        error(p, "Objected with double compression");
+                        r = -EINVAL;
                         goto fail;
                 }
 
-                if ((o->object.flags & OBJECT_COMPRESSED) && !JOURNAL_HEADER_COMPRESSED(f->header)) {
-                        log_error("Compressed object in file without compression at %llu", (unsigned long long) p);
+                if ((o->object.flags & OBJECT_COMPRESSED_XZ) && !JOURNAL_HEADER_COMPRESSED_XZ(f->header)) {
+                        error(p, "XZ compressed object in file without XZ compression");
+                        r = -EBADMSG;
+                        goto fail;
+                }
+
+                if ((o->object.flags & OBJECT_COMPRESSED_LZ4) && !JOURNAL_HEADER_COMPRESSED_LZ4(f->header)) {
+                        error(p, "LZ4 compressed object in file without LZ4 compression");
                         r = -EBADMSG;
                         goto fail;
                 }
@@ -796,7 +939,7 @@ int journal_file_verify(
 
                 case OBJECT_ENTRY:
                         if (JOURNAL_HEADER_SEALED(f->header) && n_tags <= 0) {
-                                log_error("First entry before first tag at %llu", (unsigned long long) p);
+                                error(p, "First entry before first tag");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -806,21 +949,21 @@ int journal_file_verify(
                                 goto fail;
 
                         if (le64toh(o->entry.realtime) < last_tag_realtime) {
-                                log_error("Older entry after newer tag at %llu", (unsigned long long) p);
+                                error(p, "Older entry after newer tag");
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (!entry_seqnum_set &&
                             le64toh(o->entry.seqnum) != le64toh(f->header->head_entry_seqnum)) {
-                                log_error("Head entry sequence number incorrect at %llu", (unsigned long long) p);
+                                error(p, "Head entry sequence number incorrect");
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (entry_seqnum_set &&
                             entry_seqnum >= le64toh(o->entry.seqnum)) {
-                                log_error("Entry sequence number out of synchronization at %llu", (unsigned long long) p);
+                                error(p, "Entry sequence number out of synchronization");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -831,7 +974,7 @@ int journal_file_verify(
                         if (entry_monotonic_set &&
                             sd_id128_equal(entry_boot_id, o->entry.boot_id) &&
                             entry_monotonic > le64toh(o->entry.monotonic)) {
-                                log_error("Entry timestamp out of synchronization at %llu", (unsigned long long) p);
+                                error(p, "Entry timestamp out of synchronization");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -842,7 +985,7 @@ int journal_file_verify(
 
                         if (!entry_realtime_set &&
                             le64toh(o->entry.realtime) != le64toh(f->header->head_entry_realtime)) {
-                                log_error("Head entry realtime timestamp incorrect");
+                                error(p, "Head entry realtime timestamp incorrect");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -855,14 +998,14 @@ int journal_file_verify(
 
                 case OBJECT_DATA_HASH_TABLE:
                         if (n_data_hash_tables > 1) {
-                                log_error("More than one data hash table at %llu", (unsigned long long) p);
+                                error(p, "More than one data hash table");
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (le64toh(f->header->data_hash_table_offset) != p + offsetof(HashTableObject, items) ||
                             le64toh(f->header->data_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) {
-                                log_error("Header fields for data hash table invalid");
+                                error(p, "header fields for data hash table invalid");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -872,14 +1015,14 @@ int journal_file_verify(
 
                 case OBJECT_FIELD_HASH_TABLE:
                         if (n_field_hash_tables > 1) {
-                                log_error("More than one field hash table at %llu", (unsigned long long) p);
+                                error(p, "More than one field hash table");
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (le64toh(f->header->field_hash_table_offset) != p + offsetof(HashTableObject, items) ||
                             le64toh(f->header->field_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) {
-                                log_error("Header fields for field hash table invalid");
+                                error(p, "Header fields for field hash table invalid");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -894,7 +1037,7 @@ int journal_file_verify(
 
                         if (p == le64toh(f->header->entry_array_offset)) {
                                 if (found_main_entry_array) {
-                                        log_error("More than one main entry array at %llu", (unsigned long long) p);
+                                        error(p, "More than one main entry array");
                                         r = -EBADMSG;
                                         goto fail;
                                 }
@@ -907,19 +1050,19 @@ int journal_file_verify(
 
                 case OBJECT_TAG:
                         if (!JOURNAL_HEADER_SEALED(f->header)) {
-                                log_error("Tag object in file without sealing at %llu", (unsigned long long) p);
+                                error(p, "Tag object in file without sealing");
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (le64toh(o->tag.seqnum) != n_tags + 1) {
-                                log_error("Tag sequence number out of synchronization at %llu", (unsigned long long) p);
+                                error(p, "Tag sequence number out of synchronization");
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (le64toh(o->tag.epoch) < last_epoch) {
-                                log_error("Epoch sequence out of synchronization at %llu", (unsigned long long) p);
+                                error(p, "Epoch sequence out of synchronization");
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -928,11 +1071,11 @@ int journal_file_verify(
                         if (f->seal) {
                                 uint64_t q, rt;
 
-                                log_debug("Checking tag %llu..", (unsigned long long) le64toh(o->tag.seqnum));
+                                debug(p, "Checking tag %"PRIu64"...", le64toh(o->tag.seqnum));
 
                                 rt = f->fss_start_usec + o->tag.epoch * f->fss_interval_usec;
                                 if (entry_realtime_set && entry_realtime >= rt + f->fss_interval_usec) {
-                                        log_error("Tag/entry realtime timestamp out of synchronization at %llu", (unsigned long long) p);
+                                        error(p, "tag/entry realtime timestamp out of synchronization");
                                         r = -EBADMSG;
                                         goto fail;
                                 }
@@ -958,11 +1101,11 @@ int journal_file_verify(
                                         q = last_tag;
 
                                 while (q <= p) {
-                                        r = journal_file_move_to_object(f, -1, q, &o);
+                                        r = journal_file_move_to_object(f, OBJECT_UNUSED, q, &o);
                                         if (r < 0)
                                                 goto fail;
 
-                                        r = journal_file_hmac_put_object(f, -1, o, q);
+                                        r = journal_file_hmac_put_object(f, OBJECT_UNUSED, o, q);
                                         if (r < 0)
                                                 goto fail;
 
@@ -970,12 +1113,12 @@ int journal_file_verify(
                                 }
 
                                 /* Position might have changed, let's reposition things */
-                                r = journal_file_move_to_object(f, -1, p, &o);
+                                r = journal_file_move_to_object(f, OBJECT_UNUSED, p, &o);
                                 if (r < 0)
                                         goto fail;
 
                                 if (memcmp(o->tag.tag, gcry_md_read(f->hmac, 0), TAG_LENGTH) != 0) {
-                                        log_error("Tag failed verification at %llu", (unsigned long long) p);
+                                        error(p, "Tag failed verification");
                                         r = -EBADMSG;
                                         goto fail;
                                 }
@@ -997,79 +1140,69 @@ int journal_file_verify(
                         n_weird ++;
                 }
 
-                if (p == le64toh(f->header->tail_object_offset))
-                        p = 0;
-                else
-                        p = p + ALIGN64(le64toh(o->object.size));
-        }
+                if (p == le64toh(f->header->tail_object_offset)) {
+                        found_last = true;
+                        break;
+                }
 
-        if (!found_last) {
-                log_error("Tail object pointer dead");
+                p = p + ALIGN64(le64toh(o->object.size));
+        };
+
+        if (!found_last && le64toh(f->header->tail_object_offset) != 0) {
+                error(le64toh(f->header->tail_object_offset), "Tail object pointer dead");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (n_objects != le64toh(f->header->n_objects)) {
-                log_error("Object number mismatch");
+                error(offsetof(Header, n_objects), "Object number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (n_entries != le64toh(f->header->n_entries)) {
-                log_error("Entry number mismatch");
+                error(offsetof(Header, n_entries), "Entry number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (JOURNAL_HEADER_CONTAINS(f->header, n_data) &&
             n_data != le64toh(f->header->n_data)) {
-                log_error("Data number mismatch");
+                error(offsetof(Header, n_data), "Data number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (JOURNAL_HEADER_CONTAINS(f->header, n_fields) &&
             n_fields != le64toh(f->header->n_fields)) {
-                log_error("Field number mismatch");
+                error(offsetof(Header, n_fields), "Field number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (JOURNAL_HEADER_CONTAINS(f->header, n_tags) &&
             n_tags != le64toh(f->header->n_tags)) {
-                log_error("Tag number mismatch");
+                error(offsetof(Header, n_tags), "Tag number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays) &&
             n_entry_arrays != le64toh(f->header->n_entry_arrays)) {
-                log_error("Entry array number mismatch");
-                r = -EBADMSG;
-                goto fail;
-        }
-
-        if (n_data_hash_tables != 1) {
-                log_error("Missing data hash table");
-                r = -EBADMSG;
-                goto fail;
-        }
-
-        if (n_field_hash_tables != 1) {
-                log_error("Missing field hash table");
+                error(offsetof(Header, n_entry_arrays), "Entry array number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
-        if (!found_main_entry_array) {
-                log_error("Missing entry array");
+        if (!found_main_entry_array && le64toh(f->header->entry_array_offset) != 0) {
+                error(0, "Missing entry array");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (entry_seqnum_set &&
             entry_seqnum != le64toh(f->header->tail_entry_seqnum)) {
-                log_error("Invalid tail seqnum");
+                error(offsetof(Header, tail_entry_seqnum), "Invalid tail seqnum");
                 r = -EBADMSG;
                 goto fail;
         }
@@ -1077,13 +1210,13 @@ int journal_file_verify(
         if (entry_monotonic_set &&
             (!sd_id128_equal(entry_boot_id, f->header->boot_id) ||
              entry_monotonic != le64toh(f->header->tail_entry_monotonic))) {
-                log_error("Invalid tail monotonic timestamp");
+                error(0, "Invalid tail monotonic timestamp");
                 r = -EBADMSG;
                 goto fail;
         }
 
         if (entry_realtime_set && entry_realtime != le64toh(f->header->tail_entry_realtime)) {
-                log_error("Invalid tail realtime timestamp");
+                error(0, "Invalid tail realtime timestamp");
                 r = -EBADMSG;
                 goto fail;
         }
@@ -1121,9 +1254,9 @@ int journal_file_verify(
         mmap_cache_close_fd(f->mmap, entry_fd);
         mmap_cache_close_fd(f->mmap, entry_array_fd);
 
-        close_nointr_nofail(data_fd);
-        close_nointr_nofail(entry_fd);
-        close_nointr_nofail(entry_array_fd);
+        safe_close(data_fd);
+        safe_close(entry_fd);
+        safe_close(entry_array_fd);
 
         if (first_contained)
                 *first_contained = le64toh(f->header->head_entry_realtime);
@@ -1138,25 +1271,25 @@ fail:
         if (show_progress)
                 flush_progress();
 
-        log_error("File corruption detected at %s:%llu (of %llu, %llu%%).",
+        log_error("File corruption detected at %s:"OFSfmt" (of %llu bytes, %"PRIu64"%%).",
                   f->path,
-                  (unsigned long long) p,
+                  p,
                   (unsigned long long) f->last_stat.st_size,
-                  (unsigned long long) (100 * p / f->last_stat.st_size));
+                  100 * p / f->last_stat.st_size);
 
         if (data_fd >= 0) {
                 mmap_cache_close_fd(f->mmap, data_fd);
-                close_nointr_nofail(data_fd);
+                safe_close(data_fd);
         }
 
         if (entry_fd >= 0) {
                 mmap_cache_close_fd(f->mmap, entry_fd);
-                close_nointr_nofail(entry_fd);
+                safe_close(entry_fd);
         }
 
         if (entry_array_fd >= 0) {
                 mmap_cache_close_fd(f->mmap, entry_array_fd);
-                close_nointr_nofail(entry_array_fd);
+                safe_close(entry_array_fd);
         }
 
         return r;