X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fjournal%2Fjournal-vacuum.c;h=178c8030dbe56b2ef86be90a4a4afbc629545850;hb=92f2ff4415b43e3265da0a1f09b24635f0874d55;hp=4a3a5a9e63c5579d3f1d3df265c6f4866315f1b2;hpb=6c142648aaced56ab681fcc97a71b06d588122a9;p=elogind.git

diff --git a/src/journal/journal-vacuum.c b/src/journal/journal-vacuum.c
index 4a3a5a9e6..178c8030d 100644
--- a/src/journal/journal-vacuum.c
+++ b/src/journal/journal-vacuum.c
@@ -128,6 +128,25 @@ static void patch_realtime(
 #endif
 }
 
+static int journal_file_empty(int dir_fd, const char *name) {
+        int r;
+        le64_t n_entries;
+        _cleanup_close_ int fd;
+
+        fd = openat(dir_fd, name, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
+        if (fd < 0)
+                return -errno;
+
+        if (lseek(fd, offsetof(Header, n_entries), SEEK_SET) < 0)
+                return -errno;
+
+        r = read(fd, &n_entries, sizeof(n_entries));
+        if (r != sizeof(n_entries))
+                return r == 0 ? -EINVAL : -errno;
+
+        return le64toh(n_entries) == 0;
+}
+
 int journal_directory_vacuum(
                 const char *directory,
                 uint64_t max_use,
@@ -135,10 +154,11 @@ int journal_directory_vacuum(
                 usec_t max_retention_usec,
                 usec_t *oldest_usec) {
 
-        DIR *d;
+        _cleanup_closedir_ DIR *d = NULL;
         int r = 0;
         struct vacuum_info *list = NULL;
-        unsigned n_list = 0, n_allocated = 0, i;
+        unsigned n_list = 0, i;
+        size_t n_allocated = 0;
         uint64_t sum = 0;
         usec_t retention_limit = 0;
 
@@ -246,22 +266,21 @@ int journal_directory_vacuum(
                         /* We do not vacuum active files or unknown files! */
                         continue;
 
-                patch_realtime(directory, de->d_name, &st, &realtime);
-
-                if (n_list >= n_allocated) {
-                        struct vacuum_info *j;
+                if (journal_file_empty(dirfd(d), p)) {
 
-                        n_allocated = MAX(n_allocated * 2U, 8U);
-                        j = realloc(list, n_allocated * sizeof(struct vacuum_info));
-                        if (!j) {
-                                free(p);
-                                r = -ENOMEM;
-                                goto finish;
-                        }
+                        /* Always vacuum empty non-online files. */
 
-                        list = j;
+                        if (unlinkat(dirfd(d), p, 0) >= 0)
+                                log_debug("Deleted empty journal %s/%s.", directory, p);
+                        else if (errno != ENOENT)
+                                log_warning("Failed to delete %s/%s: %m", directory, p);
+                        continue;
                 }
 
+                patch_realtime(directory, p, &st, &realtime);
+
+                GREEDY_REALLOC(list, n_allocated, n_list + 1);
+
                 list[n_list].filename = p;
                 list[n_list].usage = 512UL * (uint64_t) st.st_blocks;
                 list[n_list].seqnum = seqnum;
@@ -308,11 +327,7 @@ int journal_directory_vacuum(
 finish:
         for (i = 0; i < n_list; i++)
                 free(list[i].filename);
-
         free(list);
 
-        if (d)
-                closedir(d);
-
         return r;
 }