assert(j);
assert(fd >= 0 || path);
- if (path && ordered_hashmap_get(j->files, path))
- return 0;
+ if (path) {
+ f = ordered_hashmap_get(j->files, path);
+ if (f) {
+ /* Mark this file as seen in this generation. This is used to GC old files in
+ * process_q_overflow() to detect journal files that are still and discern them from those who
+ * are gone. */
+ f->last_seen_generation = j->generation;
+ return 0;
+ }
+ }
if (ordered_hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
log_debug("Too many open journal files, not adding %s.", path);
goto fail;
}
+ f->last_seen_generation = j->generation;
+
if (!j->has_runtime_files && path_has_prefix(j, f->path, "/run"))
j->has_runtime_files = true;
else if (!j->has_persistent_files && path_has_prefix(j, f->path, "/var"))
return sd_id128_equal(id, machine);
}
+static bool dirent_is_journal_file(const struct dirent *de) {
+ assert(de);
+
+ if (!IN_SET(de->d_type, DT_REG, DT_LNK, DT_UNKNOWN))
+ return false;
+
+ return endswith(de->d_name, ".journal") ||
+ endswith(de->d_name, ".journal~");
+}
+
+static bool dirent_is_id128_subdir(const struct dirent *de) {
+ assert(de);
+
+ if (!IN_SET(de->d_type, DT_DIR, DT_LNK, DT_UNKNOWN))
+ return false;
+
+ return id128_is_valid(de->d_name);
+}
+
+static int directory_open(sd_journal *j, const char *path, DIR **ret) {
+ DIR *d;
+
+ assert(j);
+ assert(path);
+ assert(ret);
+
+ if (j->toplevel_fd < 0)
+ d = opendir(path);
+ else
+ /* Open the specified directory relative to the toplevel fd. Enforce that the path specified is
+ * relative, by dropping the initial slash */
+ d = xopendirat(j->toplevel_fd, skip_slash(path), 0);
+ if (!d)
+ return -errno;
+
+ *ret = d;
+ return 0;
+}
+
+static int add_directory(sd_journal *j, const char *prefix, const char *dirname);
+
+static void directory_enumerate(sd_journal *j, Directory *m, DIR *d) {
+ struct dirent *de;
+
+ assert(j);
+ assert(m);
+ assert(d);
+
+ FOREACH_DIRENT_ALL(de, d, goto fail) {
+ if (dirent_is_journal_file(de))
+ (void) add_file(j, m->path, de->d_name);
+
+ if (m->is_root && dirent_is_id128_subdir(de))
+ (void) add_directory(j, m->path, de->d_name);
+ }
+
+ return;
+
+fail:
+ log_debug_errno(errno, "Failed to enumerate directory %s, ignoring: %m", m->path);
+}
+
+static void directory_watch(sd_journal *j, Directory *m, int fd, uint32_t mask) {
+ int r;
+
+ assert(j);
+ assert(m);
+ assert(fd >= 0);
+
+ /* Watch this directory if that's enabled and if it not being watched yet. */
+
+ if (m->wd > 0) /* Already have a watch? */
+ return;
+ if (j->inotify_fd < 0) /* Not watching at all? */
+ return;
+
+ m->wd = inotify_add_watch_fd(j->inotify_fd, fd, mask);
+ if (m->wd < 0) {
+ log_debug_errno(errno, "Failed to watch journal directory '%s', ignoring: %m", m->path);
+ return;
+ }
+
+ r = hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m);
+ if (r == -EEXIST)
+ log_debug_errno(r, "Directory '%s' already being watched under a different path, ignoring: %m", m->path);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to add watch for journal directory '%s' to hashmap, ignoring: %m", m->path);
+ (void) inotify_rm_watch(j->inotify_fd, m->wd);
+ m->wd = -1;
+ }
+}
+
static int add_directory(sd_journal *j, const char *prefix, const char *dirname) {
_cleanup_free_ char *path = NULL;
_cleanup_closedir_ DIR *d = NULL;
- struct dirent *de = NULL;
Directory *m;
int r, k;
goto fail;
}
- log_debug("Considering directory %s.", path);
+ log_debug("Considering directory '%s'.", path);
/* We consider everything local that is in a directory for the local machine ID, or that is stored in /run */
if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
!((dirname && dirname_is_machine_id(dirname) > 0) || path_has_prefix(j, path, "/run")))
- return 0;
-
+ return 0;
- if (j->toplevel_fd < 0)
- d = opendir(path);
- else
- /* Open the specified directory relative to the toplevel fd. Enforce that the path specified is
- * relative, by dropping the initial slash */
- d = xopendirat(j->toplevel_fd, skip_slash(path), 0);
- if (!d) {
- r = log_debug_errno(errno, "Failed to open directory %s: %m", path);
+ r = directory_open(j, path, &d);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to open directory '%s': %m", path);
goto fail;
}
log_debug("Directory %s added.", m->path);
} else if (m->is_root)
- return 0;
+ return 0; /* Don't 'downgrade' from root directory */
- if (m->wd <= 0 && j->inotify_fd >= 0) {
- /* Watch this directory, if it not being watched yet. */
+ m->last_seen_generation = j->generation;
- m->wd = inotify_add_watch_fd(j->inotify_fd, dirfd(d),
- IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
- IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_MOVED_FROM|
- IN_ONLYDIR);
-
- if (m->wd > 0 && hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m) < 0)
- inotify_rm_watch(j->inotify_fd, m->wd);
- }
+ directory_watch(j, m, dirfd(d),
+ IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
+ IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_MOVED_FROM|
+ IN_ONLYDIR);
- FOREACH_DIRENT_ALL(de, d, r = log_debug_errno(errno, "Failed to read directory %s: %m", m->path); goto fail) {
-
- if (dirent_is_file_with_suffix(de, ".journal") ||
- dirent_is_file_with_suffix(de, ".journal~"))
- (void) add_file(j, m->path, de->d_name);
- }
+ if (!j->no_new_files)
+ directory_enumerate(j, m, d);
check_network(j, dirfd(d));
static int add_root_directory(sd_journal *j, const char *p, bool missing_ok) {
_cleanup_closedir_ DIR *d = NULL;
- struct dirent *de;
Directory *m;
int r, k;
if (p) {
/* If there's a path specified, use it. */
+ log_debug("Considering root directory '%s'.", p);
+
if ((j->flags & SD_JOURNAL_RUNTIME_ONLY) &&
!path_has_prefix(j, p, "/run"))
return -EINVAL;
if (j->prefix)
p = strjoina(j->prefix, p);
- if (j->toplevel_fd < 0)
- d = opendir(p);
- else
- d = xopendirat(j->toplevel_fd, skip_slash(p), 0);
-
- if (!d) {
- if (errno == ENOENT && missing_ok)
- return 0;
-
- r = log_debug_errno(errno, "Failed to open root directory %s: %m", p);
+ r = directory_open(j, p, &d);
+ if (r == -ENOENT && missing_ok)
+ return 0;
+ if (r < 0) {
+ log_debug_errno(r, "Failed to open root directory %s: %m", p);
goto fail;
}
} else {
} else if (!m->is_root)
return 0;
- if (m->wd <= 0 && j->inotify_fd >= 0) {
+ directory_watch(j, m, dirfd(d),
+ IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
+ IN_ONLYDIR);
- m->wd = inotify_add_watch_fd(j->inotify_fd, dirfd(d),
- IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
- IN_ONLYDIR);
-
- if (m->wd > 0 && hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m) < 0)
- inotify_rm_watch(j->inotify_fd, m->wd);
- }
-
- if (j->no_new_files)
- return 0;
-
- FOREACH_DIRENT_ALL(de, d, r = log_debug_errno(errno, "Failed to read directory %s: %m", m->path); goto fail) {
- sd_id128_t id;
-
- if (dirent_is_file_with_suffix(de, ".journal") ||
- dirent_is_file_with_suffix(de, ".journal~"))
- (void) add_file(j, m->path, de->d_name);
- else if (IN_SET(de->d_type, DT_DIR, DT_LNK, DT_UNKNOWN) &&
- sd_id128_from_string(de->d_name, &id) >= 0)
- (void) add_directory(j, m->path, de->d_name);
- }
+ if (!j->no_new_files)
+ directory_enumerate(j, m, d);
check_network(j, dirfd(d));
j->current_field = 0;
}
+static int reiterate_all_paths(sd_journal *j) {
+ assert(j);
+
+ if (j->no_new_files)
+ return add_current_paths(j);
+
+ if (j->flags & SD_JOURNAL_OS_ROOT)
+ return add_search_paths(j);
+
+ if (j->toplevel_fd >= 0)
+ return add_root_directory(j, NULL, false);
+
+ if (j->path)
+ return add_root_directory(j, j->path, true);
+
+ return add_search_paths(j);
+}
+
_public_ int sd_journal_get_fd(sd_journal *j) {
int r;
if (r < 0)
return r;
- log_debug("Reiterating files to get inotify watches established");
+ log_debug("Reiterating files to get inotify watches established.");
- /* Iterate through all dirs again, to add them to the
- * inotify */
- if (j->no_new_files)
- r = add_current_paths(j);
- else if (j->flags & SD_JOURNAL_OS_ROOT)
- r = add_search_paths(j);
- else if (j->toplevel_fd >= 0)
- r = add_root_directory(j, NULL, false);
- else if (j->path)
- r = add_root_directory(j, j->path, true);
- else
- r = add_search_paths(j);
+ /* Iterate through all dirs again, to add them to the inotify */
+ r = reiterate_all_paths(j);
if (r < 0)
return r;
return 1;
}
+static void process_q_overflow(sd_journal *j) {
+ JournalFile *f;
+ Directory *m;
+ Iterator i;
+
+ assert(j);
+
+ /* When the inotify queue overruns we need to enumerate and re-validate all journal files to bring our list
+ * back in sync with what's on disk. For this we pick a new generation counter value. It'll be assigned to all
+ * journal files we encounter. All journal files and all directories that don't carry it after reenumeration
+ * are subject for unloading. */
+
+ log_debug("Inotify queue overrun, reiterating everything.");
+
+ j->generation++;
+ (void) reiterate_all_paths(j);
+
+ ORDERED_HASHMAP_FOREACH(f, j->files, i) {
+
+ if (f->last_seen_generation == j->generation)
+ continue;
+
+ log_debug("File '%s' hasn't been seen in this enumeration, removing.", f->path);
+ remove_file_real(j, f);
+ }
+
+ HASHMAP_FOREACH(m, j->directories_by_path, i) {
+
+ if (m->last_seen_generation == j->generation)
+ continue;
+
+ if (m->is_root) /* Never GC root directories */
+ continue;
+
+ log_debug("Directory '%s' hasn't been seen in this enumeration, removing.", f->path);
+ remove_directory(j, m);
+ }
+
+ log_debug("Reiteration complete.");
+}
+
static void process_inotify_event(sd_journal *j, struct inotify_event *e) {
Directory *d;
assert(j);
assert(e);
+ if (e->mask & IN_Q_OVERFLOW) {
+ process_q_overflow(j);
+ return;
+ }
+
/* Is this a subdirectory we watch? */
d = hashmap_get(j->directories_by_wd, INT_TO_PTR(e->wd));
if (d) {
projects / platform / upstream / systemd.git / commitdiff