journald: avoid NSS in journald

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

diff --git a/src/journal/journal-vacuum.c b/src/journal/journal-vacuum.c
index 1ddb043e2cd13ccc0bbf4a70984455752382d1fe..c73ad8f3938f8ce015322b85b8b589c126ff03f8 100644 (file)
--- 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,
@@ -140,7 +159,7 @@ int journal_directory_vacuum(
         struct vacuum_info *list = NULL;
         unsigned n_list = 0, i;
         size_t n_allocated = 0;
-        uint64_t sum = 0;
+        uint64_t sum = 0, freed = 0;
         usec_t retention_limit = 0;
 
         assert(directory);
@@ -247,7 +266,22 @@ int journal_directory_vacuum(
                         /* We do not vacuum active files or unknown files! */
                         continue;
 
-                patch_realtime(directory, de->d_name, &st, &realtime);
+                if (journal_file_empty(dirfd(d), p)) {
+                        /* Always vacuum empty non-online files. */
+
+                        uint64_t size = 512UL * (uint64_t) st.st_blocks;
+
+                        if (unlinkat(dirfd(d), p, 0) >= 0) {
+                                log_info("Deleted empty journal %s/%s (%"PRIu64" bytes).",
+                                         directory, p, size);
+                                freed += size;
+                        } 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);
 
@@ -280,7 +314,9 @@ int journal_directory_vacuum(
                         break;
 
                 if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) {
-                        log_debug("Deleted archived journal %s/%s.", directory, list[i].filename);
+                        log_debug("Deleted archived journal %s/%s (%"PRIu64" bytes).",
+                                  directory, list[i].filename, list[i].usage);
+                        freed += list[i].usage;
 
                         if (list[i].usage < sum)
                                 sum -= list[i].usage;
@@ -299,5 +335,7 @@ finish:
                 free(list[i].filename);
         free(list);
 
+        log_info("Vacuuming done, freed %"PRIu64" bytes", freed);
+
         return r;
 }