X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fjournal%2Fsd-journal.c;h=ecf47fda3d36481d5426eb3c323fd5674a36b6e8;hb=4af7b60d428765c2d2c66c46f416f6dae55e9ddb;hp=8cf6de651e58481ea81583923b028c064d40cbc9;hpb=e499c9998bb42b792afb1acd3532fe975280c0fd;p=elogind.git

diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
index 8cf6de651..ecf47fda3 100644
--- a/src/journal/sd-journal.c
+++ b/src/journal/sd-journal.c
@@ -43,7 +43,7 @@
 #include "replace-var.h"
 #include "fileio.h"
 
-#define JOURNAL_FILES_MAX 1024
+#define JOURNAL_FILES_MAX 7168
 
 #define JOURNAL_FILES_RECHECK_USEC (2 * USEC_PER_SEC)
 
@@ -412,60 +412,51 @@ _public_ void sd_journal_flush_matches(sd_journal *j) {
         detach_location(j);
 }
 
-_pure_ static int compare_with_location(JournalFile *af, Object *ao, Location *l) {
-        uint64_t a;
-
-        assert(af);
-        assert(ao);
+_pure_ static int compare_with_location(JournalFile *f, Location *l) {
+        assert(f);
         assert(l);
+        assert(f->location_type == LOCATION_SEEK);
         assert(l->type == LOCATION_DISCRETE || l->type == LOCATION_SEEK);
 
         if (l->monotonic_set &&
-            sd_id128_equal(ao->entry.boot_id, l->boot_id) &&
+            sd_id128_equal(f->current_boot_id, l->boot_id) &&
             l->realtime_set &&
-            le64toh(ao->entry.realtime) == l->realtime &&
+            f->current_realtime == l->realtime &&
             l->xor_hash_set &&
-            le64toh(ao->entry.xor_hash) == l->xor_hash)
+            f->current_xor_hash == l->xor_hash)
                 return 0;
 
         if (l->seqnum_set &&
-            sd_id128_equal(af->header->seqnum_id, l->seqnum_id)) {
-
-                a = le64toh(ao->entry.seqnum);
+            sd_id128_equal(f->header->seqnum_id, l->seqnum_id)) {
 
-                if (a < l->seqnum)
+                if (f->current_seqnum < l->seqnum)
                         return -1;
-                if (a > l->seqnum)
+                if (f->current_seqnum > l->seqnum)
                         return 1;
         }
 
         if (l->monotonic_set &&
-            sd_id128_equal(ao->entry.boot_id, l->boot_id)) {
+            sd_id128_equal(f->current_boot_id, l->boot_id)) {
 
-                a = le64toh(ao->entry.monotonic);
-
-                if (a < l->monotonic)
+                if (f->current_monotonic < l->monotonic)
                         return -1;
-                if (a > l->monotonic)
+                if (f->current_monotonic > l->monotonic)
                         return 1;
         }
 
         if (l->realtime_set) {
 
-                a = le64toh(ao->entry.realtime);
-
-                if (a < l->realtime)
+                if (f->current_realtime < l->realtime)
                         return -1;
-                if (a > l->realtime)
+                if (f->current_realtime > l->realtime)
                         return 1;
         }
 
         if (l->xor_hash_set) {
-                a = le64toh(ao->entry.xor_hash);
 
-                if (a < l->xor_hash)
+                if (f->current_xor_hash < l->xor_hash)
                         return -1;
-                if (a > l->xor_hash)
+                if (f->current_xor_hash > l->xor_hash)
                         return 1;
         }
 
@@ -681,9 +672,9 @@ static int find_location_with_matches(
                 /* No matches is simple */
 
                 if (j->current_location.type == LOCATION_HEAD)
-                        return journal_file_next_entry(f, NULL, 0, DIRECTION_DOWN, ret, offset);
+                        return journal_file_next_entry(f, 0, DIRECTION_DOWN, ret, offset);
                 if (j->current_location.type == LOCATION_TAIL)
-                        return journal_file_next_entry(f, NULL, 0, DIRECTION_UP, ret, offset);
+                        return journal_file_next_entry(f, 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) {
@@ -694,7 +685,7 @@ static int find_location_with_matches(
                 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);
+                return journal_file_next_entry(f, 0, direction, ret, offset);
         } else
                 return find_location_for_match(j, j->level0, f, direction, ret, offset);
 }
@@ -706,49 +697,55 @@ static int next_with_matches(
                 Object **ret,
                 uint64_t *offset) {
 
-        Object *c;
-        uint64_t cp;
-
         assert(j);
         assert(f);
         assert(ret);
         assert(offset);
 
-        c = *ret;
-        cp = *offset;
-
         /* 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);
+                return journal_file_next_entry(f, f->current_offset, direction, ret, offset);
 
         /* If we have a match then we look for the next matching entry
          * with 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);
+        return next_for_match(j, j->level0, f,
+                              direction == DIRECTION_DOWN ? f->current_offset + 1
+                                                          : f->current_offset - 1,
+                              direction, ret, offset);
 }
 
-static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
+static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction) {
         Object *c;
-        uint64_t cp;
+        uint64_t cp, n_entries;
         int r;
 
         assert(j);
         assert(f);
 
         if (f->last_direction == direction && f->current_offset > 0) {
-                cp = f->current_offset;
+                /* If we hit EOF before, recheck if any new entries arrived. */
+                n_entries = le64toh(f->header->n_entries);
+                if (f->location_type == LOCATION_TAIL && n_entries == f->last_n_entries)
+                        return 0;
+                f->last_n_entries = n_entries;
 
-                r = journal_file_move_to_object(f, OBJECT_ENTRY, cp, &c);
-                if (r < 0)
-                        return r;
+                /* LOCATION_SEEK here means we did the work in a previous
+                 * iteration and the current location already points to a
+                 * candidate entry. */
+                if (f->location_type != LOCATION_SEEK) {
+                        r = next_with_matches(j, f, direction, &c, &cp);
+                        if (r <= 0)
+                                return r;
 
-                r = next_with_matches(j, f, direction, &c, &cp);
-                if (r <= 0)
-                        return r;
+                        journal_file_save_location(f, direction, c, cp);
+                }
         } else {
                 r = find_location_with_matches(j, f, direction, &c, &cp);
                 if (r <= 0)
                         return r;
+
+                journal_file_save_location(f, direction, c, cp);
         }
 
         /* OK, we found the spot, now let's advance until an entry
@@ -763,31 +760,25 @@ static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direc
                 if (j->current_location.type == LOCATION_DISCRETE) {
                         int k;
 
-                        k = compare_with_location(f, c, &j->current_location);
+                        k = compare_with_location(f, &j->current_location);
 
                         found = direction == DIRECTION_DOWN ? k > 0 : k < 0;
                 } else
                         found = true;
 
-                if (found) {
-                        journal_file_save_location(f, direction, c, cp);
-
-                        if (ret)
-                                *ret = c;
-                        if (offset)
-                                *offset = cp;
+                if (found)
                         return 1;
-                }
 
                 r = next_with_matches(j, f, direction, &c, &cp);
                 if (r <= 0)
                         return r;
+
+                journal_file_save_location(f, direction, c, cp);
         }
 }
 
 static int real_journal_next(sd_journal *j, direction_t direction) {
         JournalFile *f, *new_file = NULL;
-        uint64_t p = 0;
         Iterator i;
         Object *o;
         int r;
@@ -798,7 +789,7 @@ static int real_journal_next(sd_journal *j, direction_t direction) {
         ORDERED_HASHMAP_FOREACH(f, j->files, i) {
                 bool found;
 
-                r = next_beyond_location(j, f, direction, &o, &p);
+                r = next_beyond_location(j, f, direction);
                 if (r < 0) {
                         log_debug_errno(r, "Can't iterate through %s, ignoring: %m", f->path);
                         remove_file_real(j, f);
@@ -1164,9 +1155,9 @@ static void check_network(sd_journal *j, int fd) {
 static bool file_has_type_prefix(const char *prefix, const char *filename) {
         const char *full, *tilded, *atted;
 
-        full = strappenda(prefix, ".journal");
-        tilded = strappenda(full, "~");
-        atted = strappenda(prefix, "@");
+        full = strjoina(prefix, ".journal");
+        tilded = strjoina(full, "~");
+        atted = strjoina(prefix, "@");
 
         return streq(filename, full) ||
                streq(filename, tilded) ||
@@ -1187,8 +1178,7 @@ static bool file_type_wanted(int flags, const char *filename) {
         if (flags & SD_JOURNAL_CURRENT_USER) {
                 char prefix[5 + DECIMAL_STR_MAX(uid_t) + 1];
 
-                assert_se(snprintf(prefix, sizeof(prefix), "user-"UID_FMT, getuid())
-                          < (int) sizeof(prefix));
+                xsprintf(prefix, "user-"UID_FMT, getuid());
 
                 if (file_has_type_prefix(prefix, filename))
                         return true;
@@ -1409,7 +1399,7 @@ static int add_root_directory(sd_journal *j, const char *p) {
                 return -EINVAL;
 
         if (j->prefix)
-                p = strappenda(j->prefix, p);
+                p = strjoina(j->prefix, p);
 
         d = opendir(p);
         if (!d)
@@ -1653,7 +1643,7 @@ _public_ int sd_journal_open_container(sd_journal **ret, const char *machine, in
         assert_return((flags & ~(SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM)) == 0, -EINVAL);
         assert_return(machine_name_is_valid(machine), -EINVAL);
 
-        p = strappenda("/run/systemd/machines/", machine);
+        p = strjoina("/run/systemd/machines/", machine);
         r = parse_env_file(p, NEWLINE, "ROOT", &root, "CLASS", &class, NULL);
         if (r == -ENOENT)
                 return -EHOSTDOWN;
@@ -2197,11 +2187,11 @@ _public_ int sd_journal_process(sd_journal *j) {
         j->last_process_usec = now(CLOCK_MONOTONIC);
 
         for (;;) {
-                uint8_t buffer[INOTIFY_EVENT_MAX] _alignas_(struct inotify_event);
+                union inotify_event_buffer buffer;
                 struct inotify_event *e;
                 ssize_t l;
 
-                l = read(j->inotify_fd, buffer, sizeof(buffer));
+                l = read(j->inotify_fd, &buffer, sizeof(buffer));
                 if (l < 0) {
                         if (errno == EAGAIN || errno == EINTR)
                                 return got_something ? determine_change(j) : SD_JOURNAL_NOP;