journal: keep per-JournalFile location info during iteration

[elogind.git] / src / journal / sd-journal.c

diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
index 61e64f7f7c64fc4668800bbc453ef60cdb686505..71b056c234fa827ec3e8d41f60dd22d433523e42 100644 (file)
--- a/src/journal/sd-journal.c
+++ b/src/journal/sd-journal.c
@@ -87,7 +87,7 @@ static void detach_location(sd_journal *j) {
         j->current_field = 0;
 
         ORDERED_HASHMAP_FOREACH(f, j->files, i)
-                f->current_offset = 0;
+                journal_file_reset_location(f);
 }
 
 static void reset_location(sd_journal *j) {
@@ -128,6 +128,10 @@ static void set_location(sd_journal *j, LocationType type, JournalFile *f, Objec
 
         f->last_direction = direction;
         f->current_offset = offset;
+
+        /* Let f know its candidate entry was picked. */
+        assert(f->location_type == LOCATION_SEEK);
+        f->location_type = LOCATION_DISCRETE;
 }
 
 static int match_is_valid(const void *data, size_t size) {
@@ -855,6 +859,8 @@ static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direc
                         found = true;
 
                 if (found) {
+                        journal_file_save_location(f, direction, c, cp);
+
                         if (ret)
                                 *ret = c;
                         if (offset)
@@ -887,8 +893,10 @@ static int real_journal_next(sd_journal *j, direction_t direction) {
                         log_debug_errno(r, "Can't iterate through %s, ignoring: %m", f->path);
                         remove_file_real(j, f);
                         continue;
-                } else if (r == 0)
+                } else if (r == 0) {
+                        f->location_type = LOCATION_TAIL;
                         continue;
+                }
 
                 if (!new_file)
                         found = true;
@@ -1410,7 +1418,7 @@ static int add_directory(sd_journal *j, const char *prefix, const char *dirname)
 
         d = opendir(path);
         if (!d) {
-                log_debug("Failed to open %s: %m", path);
+                log_debug_errno(errno, "Failed to open %s: %m", path);
                 if (errno == ENOENT)
                         return 0;
                 return -errno;
@@ -1456,7 +1464,7 @@ static int add_directory(sd_journal *j, const char *prefix, const char *dirname)
                 de = readdir(d);
                 if (!de && errno != 0) {
                         r = -errno;
-                        log_debug("Failed to read directory %s: %m", m->path);
+                        log_debug_errno(errno, "Failed to read directory %s: %m", m->path);
                         return r;
                 }
                 if (!de)
@@ -1466,8 +1474,8 @@ static int add_directory(sd_journal *j, const char *prefix, const char *dirname)
                     dirent_is_file_with_suffix(de, ".journal~")) {
                         r = add_file(j, m->path, de->d_name);
                         if (r < 0) {
-                                log_debug("Failed to add file %s/%s: %s",
-                                          m->path, de->d_name, strerror(-r));
+                                log_debug_errno(r, "Failed to add file %s/%s: %m",
+                                                m->path, de->d_name);
                                 r = set_put_error(j, r);
                                 if (r < 0)
                                         return r;
@@ -1546,7 +1554,7 @@ static int add_root_directory(sd_journal *j, const char *p) {
                 de = readdir(d);
                 if (!de && errno != 0) {
                         r = -errno;
-                        log_debug("Failed to read directory %s: %m", m->path);
+                        log_debug_errno(errno, "Failed to read directory %s: %m", m->path);
                         return r;
                 }
                 if (!de)
@@ -1556,8 +1564,8 @@ static int add_root_directory(sd_journal *j, const char *p) {
                     dirent_is_file_with_suffix(de, ".journal~")) {
                         r = add_file(j, m->path, de->d_name);
                         if (r < 0) {
-                                log_debug("Failed to add file %s/%s: %s",
-                                          m->path, de->d_name, strerror(-r));
+                                log_debug_errno(r, "Failed to add file %s/%s: %m",
+                                                m->path, de->d_name);
                                 r = set_put_error(j, r);
                                 if (r < 0)
                                         return r;
@@ -2218,8 +2226,8 @@ static void process_inotify_event(sd_journal *j, struct inotify_event *e) {
                         if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
                                 r = add_file(j, d->path, e->name);
                                 if (r < 0) {
-                                        log_debug("Failed to add file %s/%s: %s",
-                                                  d->path, e->name, strerror(-r));
+                                        log_debug_errno(r, "Failed to add file %s/%s: %m",
+                                                        d->path, e->name);
                                         set_put_error(j, r);
                                 }
 
@@ -2273,7 +2281,6 @@ static int determine_change(sd_journal *j) {
 }
 
 _public_ int sd_journal_process(sd_journal *j) {
-        uint8_t buffer[sizeof(struct inotify_event) + FILENAME_MAX] _alignas_(struct inotify_event);
         bool got_something = false;
 
         assert_return(j, -EINVAL);
@@ -2282,6 +2289,7 @@ _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);
                 struct inotify_event *e;
                 ssize_t l;
 
@@ -2295,18 +2303,8 @@ _public_ int sd_journal_process(sd_journal *j) {
 
                 got_something = true;
 
-                e = (struct inotify_event*) buffer;
-                while (l > 0) {
-                        size_t step;
-
+                FOREACH_INOTIFY_EVENT(e, buffer, l)
                         process_inotify_event(j, e);
-
-                        step = sizeof(struct inotify_event) + e->len;
-                        assert(step <= (size_t) l);
-
-                        e = (struct inotify_event*) ((uint8_t*) e + step);
-                        l -= step;
-                }
         }
 }
 
@@ -2526,7 +2524,6 @@ _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_
                 size_t ol;
                 bool found;
                 int r;
-                void *release_cookie;
 
                 /* Proceed to next data object in the field's linked list */
                 if (j->unique_offset == 0) {
@@ -2552,10 +2549,10 @@ _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_
                         continue;
                 }
 
-                /* We do not use the type context here, but 0 instead,
-                 * so that we can look at this data object at the same
+                /* We do not use OBJECT_DATA context here, but OBJECT_UNUSED
+                 * instead, so that we can look at this data object at the same
                  * time as one on another file */
-                r = journal_file_move_to_object(j->unique_file, 0, j->unique_offset, &o);
+                r = journal_file_move_to_object(j->unique_file, OBJECT_UNUSED, j->unique_offset, &o);
                 if (r < 0)
                         return r;
 
@@ -2567,10 +2564,6 @@ _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_
                         return -EBADMSG;
                 }
 
-                r = journal_file_object_keep(j->unique_file, o, j->unique_offset, &release_cookie);
-                if (r < 0)
-                        return r;
-
                 r = return_data(j, j->unique_file, o, &odata, &ol);
                 if (r < 0)
                         return r;
@@ -2615,10 +2608,6 @@ _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_
                                 found = true;
                 }
 
-                r = journal_file_object_release(j->unique_file, release_cookie);
-                if (r < 0)
-                        return r;
-
                 if (found)
                         continue;