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-rw-r--r--udev/udev-builtin-kmod.c14
-rw-r--r--udev/udev-builtin.c33
-rw-r--r--udev/udev-rules.c19
-rw-r--r--udev/udev.h9
-rw-r--r--udev/udevd.c120
5 files changed, 95 insertions, 100 deletions
diff --git a/udev/udev-builtin-kmod.c b/udev/udev-builtin-kmod.c
index f5b41b1ab4..7f2faee261 100644
--- a/udev/udev-builtin-kmod.c
+++ b/udev/udev-builtin-kmod.c
@@ -322,6 +322,7 @@ static void udev_kmod_log(void *data, int priority, const char *file, int line,
udev_main_log(data, priority, file, line, fn, format, args);
}
+/* needs to re-instantiate the context after a reload */
static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool test)
{
struct udev *udev = udev_device_get_udev(dev);
@@ -350,6 +351,7 @@ static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool te
return EXIT_SUCCESS;
}
+/* called at udev startup */
static int builtin_kmod_init(struct udev *udev)
{
if (ctx)
@@ -365,11 +367,18 @@ static int builtin_kmod_init(struct udev *udev)
return 0;
}
-static int builtin_kmod_exit(struct udev *udev)
+/* called on udev shutdown and reload request */
+static void builtin_kmod_exit(struct udev *udev)
{
ctx = kmod_unref(ctx);
info(udev, "unload module index\n");
- return 0;
+}
+
+/* called every couple of seconds during event activity; 'true' if config has changed */
+static bool builtin_kmod_validate(struct udev *udev)
+{
+ info(udev, "validate module index\n");
+ return false;
}
const struct udev_builtin udev_builtin_kmod = {
@@ -377,6 +386,7 @@ const struct udev_builtin udev_builtin_kmod = {
.cmd = builtin_kmod,
.init = builtin_kmod_init,
.exit = builtin_kmod_exit,
+ .validate = builtin_kmod_validate,
.help = "kernel module loader",
.run_once = false,
};
diff --git a/udev/udev-builtin.c b/udev/udev-builtin.c
index cf62d57e23..9804c50fae 100644
--- a/udev/udev-builtin.c
+++ b/udev/udev-builtin.c
@@ -37,30 +37,45 @@ static const struct udev_builtin *builtins[] = {
int udev_builtin_init(struct udev *udev)
{
unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(builtins); i++)
- if (builtins[i]->init)
- builtins[i]->init(udev);
- return 0;
+ int err;
+
+ for (i = 0; i < ARRAY_SIZE(builtins); i++) {
+ if (builtins[i]->init) {
+ err = builtins[i]->init(udev);
+ if (err < 0)
+ break;
+ }
+ }
+ return err;
}
-int udev_builtin_exit(struct udev *udev)
+void udev_builtin_exit(struct udev *udev)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(builtins); i++)
if (builtins[i]->exit)
builtins[i]->exit(udev);
- return 0;
}
-int udev_builtin_list(struct udev *udev)
+bool udev_builtin_validate(struct udev *udev)
+{
+ unsigned int i;
+ bool change = false;
+
+ for (i = 0; i < ARRAY_SIZE(builtins); i++)
+ if (builtins[i]->validate)
+ if (builtins[i]->validate(udev))
+ change = true;
+ return change;
+}
+
+void udev_builtin_list(struct udev *udev)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(builtins); i++)
fprintf(stderr, " %-12s %s\n", builtins[i]->name, builtins[i]->help);
- return 0;
}
const char *udev_builtin_name(enum udev_builtin_cmd cmd)
diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index aa750219da..411b9d88eb 100644
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -1750,6 +1750,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
struct udev_list file_list;
struct udev_list_entry *file_loop;
struct token end_token;
+ char **s;
rules = calloc(1, sizeof(struct udev_rules));
if (rules == NULL)
@@ -1791,22 +1792,8 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
rules->trie_nodes_cur = 1;
- if (udev_get_rules_path(udev) == NULL) {
- char filename[UTIL_PATH_SIZE];
-
- /* /usr/lib/udev -- system rules */
- add_matching_files(udev, &file_list, LIBEXECDIR "/rules.d", ".rules");
-
- /* /etc/udev -- local administration rules */
- add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
-
- /* /run/udev -- runtime rules */
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL);
- add_matching_files(udev, &file_list, filename, ".rules");
- } else {
- /* custom rules files location for testing */
- add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
- }
+ for (udev_get_rules_path(udev, &s, NULL); *s != NULL; s++)
+ add_matching_files(udev, &file_list, *s, ".rules");
/* add all filenames to the string buffer */
udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
diff --git a/udev/udev.h b/udev/udev.h
index 46dafd68e3..a289f35c4d 100644
--- a/udev/udev.h
+++ b/udev/udev.h
@@ -146,7 +146,8 @@ struct udev_builtin {
int (*cmd)(struct udev_device *dev, int argc, char *argv[], bool test);
const char *help;
int (*init)(struct udev *udev);
- int (*exit)(struct udev *udev);
+ void (*exit)(struct udev *udev);
+ bool (*validate)(struct udev *udev);
bool run_once;
};
extern const struct udev_builtin udev_builtin_blkid;
@@ -155,13 +156,13 @@ extern const struct udev_builtin udev_builtin_input_id;
extern const struct udev_builtin udev_builtin_kmod;
extern const struct udev_builtin udev_builtin_path_id;
extern const struct udev_builtin udev_builtin_usb_id;
-int udev_builtin_load(struct udev *udev);
-int udev_builtin_unload(struct udev *udev);
+int udev_builtin_init(struct udev *udev);
+void udev_builtin_exit(struct udev *udev);
enum udev_builtin_cmd udev_builtin_lookup(const char *command);
const char *udev_builtin_name(enum udev_builtin_cmd cmd);
bool udev_builtin_run_once(enum udev_builtin_cmd cmd);
int udev_builtin_run(struct udev_device *dev, enum udev_builtin_cmd cmd, const char *command, bool test);
-int udev_builtin_list(struct udev *udev);
+void udev_builtin_list(struct udev *udev);
int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val);
/* udev logging */
diff --git a/udev/udevd.c b/udev/udevd.c
index 37eb4ba4b1..f810b9431c 100644
--- a/udev/udevd.c
+++ b/udev/udevd.c
@@ -736,19 +736,6 @@ static int handle_inotify(struct udev *udev)
struct udev_device *dev;
ev = (struct inotify_event *)(buf + pos);
- if (ev->len) {
- const char *s;
-
- info(udev, "inotify event: %x for %s\n", ev->mask, ev->name);
- s = strstr(ev->name, ".rules");
- if (s == NULL)
- continue;
- if (strlen(s) != strlen(".rules"))
- continue;
- reload = true;
- continue;
- }
-
dev = udev_watch_lookup(udev, ev->wd);
if (dev != NULL) {
info(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev));
@@ -1169,6 +1156,36 @@ static int systemd_fds(struct udev *udev, int *rctrl, int *rnetlink)
return 0;
}
+static bool check_rules_timestamp(struct udev *udev)
+{
+ char **p;
+ unsigned long long *stamp_usec;
+ int i, n;
+ bool changed = false;
+
+ n = udev_get_rules_path(udev, &p, &stamp_usec);
+ for (i = 0; i < n; i++) {
+ struct stat stats;
+
+ if (stat(p[i], &stats) < 0)
+ continue;
+
+ if (stamp_usec[i] == ts_usec(&stats.st_mtim))
+ continue;
+
+ /* first check */
+ if (stamp_usec[i] != 0) {
+ info(udev, "reload - timestamp of '%s' changed\n", p[i]);
+ changed = true;
+ }
+
+ /* update timestamp */
+ stamp_usec[i] = ts_usec(&stats.st_mtim);
+ }
+
+ return changed;
+}
+
int main(int argc, char *argv[])
{
struct udev *udev;
@@ -1191,6 +1208,7 @@ int main(int argc, char *argv[])
int fd_worker = -1;
struct epoll_event ep_ctrl, ep_inotify, ep_signal, ep_netlink, ep_worker;
struct udev_ctrl_connection *ctrl_conn = NULL;
+ char **s;
int rc = 1;
udev = udev_new();
@@ -1202,31 +1220,6 @@ int main(int argc, char *argv[])
info(udev, "version %s\n", VERSION);
udev_selinux_init(udev);
- /* make sure, that our runtime dir exists and is writable */
- if (utimensat(AT_FDCWD, udev_get_run_config_path(udev), NULL, 0) < 0) {
- /* try to create our own subdirectory, do not create parent directories */
- mkdir(udev_get_run_config_path(udev), 0755);
-
- if (utimensat(AT_FDCWD, udev_get_run_config_path(udev), NULL, 0) >= 0) {
- /* directory seems writable now */
- udev_set_run_path(udev, udev_get_run_config_path(udev));
- } else {
- /* fall back to /dev/.udev */
- char filename[UTIL_PATH_SIZE];
-
- util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev", NULL);
- if (udev_set_run_path(udev, filename) == NULL)
- goto exit;
- mkdir(udev_get_run_path(udev), 0755);
- err(udev, "error: runtime directory '%s' not writable, for now falling back to '%s'",
- udev_get_run_config_path(udev), udev_get_run_path(udev));
- }
- }
- /* relabel runtime dir only if it resides below /dev */
- if (strncmp(udev_get_run_path(udev), udev_get_dev_path(udev), strlen(udev_get_dev_path(udev))) == 0)
- udev_selinux_lsetfilecon(udev, udev_get_run_path(udev), 0755);
- info(udev, "runtime dir '%s'\n", udev_get_run_path(udev));
-
for (;;) {
int option;
@@ -1469,28 +1462,6 @@ int main(int argc, char *argv[])
rc = 4;
goto exit;
}
-
- if (udev_get_rules_path(udev) != NULL) {
- inotify_add_watch(fd_inotify, udev_get_rules_path(udev),
- IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
- } else {
- char filename[UTIL_PATH_SIZE];
- struct stat statbuf;
-
- inotify_add_watch(fd_inotify, LIBEXECDIR "/rules.d",
- IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
- inotify_add_watch(fd_inotify, SYSCONFDIR "/udev/rules.d",
- IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
-
- /* watch dynamic rules directory */
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL);
- if (stat(filename, &statbuf) != 0) {
- util_create_path(udev, filename);
- mkdir(filename, 0755);
- }
- inotify_add_watch(fd_inotify, filename,
- IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
- }
udev_watch_restore(udev);
/* block and listen to all signals on signalfd */
@@ -1575,6 +1546,7 @@ int main(int argc, char *argv[])
udev_list_node_init(&worker_list);
for (;;) {
+ static unsigned long long last_usec;
struct epoll_event ev[8];
int fdcount;
int timeout;
@@ -1642,6 +1614,24 @@ int main(int argc, char *argv[])
is_ctrl = true;
}
+ /* check for changed config, every 3 seconds at most */
+ if ((now_usec() - last_usec) > 3 * 1000 * 1000) {
+ if (check_rules_timestamp(udev))
+ reload = true;
+ if (udev_builtin_validate(udev))
+ reload = true;
+
+ last_usec = now_usec();
+ }
+
+ /* reload requested, HUP signal received, rules changed, builtin changed */
+ if (reload) {
+ worker_kill(udev, 0);
+ rules = udev_rules_unref(rules);
+ udev_builtin_exit(udev);
+ reload = 0;
+ }
+
/* event has finished */
if (is_worker)
worker_returned(fd_worker);
@@ -1678,7 +1668,7 @@ int main(int argc, char *argv[])
if (udev_exit)
continue;
- /* device node and rules directory inotify watch */
+ /* device node watch */
if (is_inotify)
handle_inotify(udev);
@@ -1693,14 +1683,6 @@ int main(int argc, char *argv[])
*/
if (is_ctrl)
ctrl_conn = handle_ctrl_msg(udev_ctrl);
-
- /* rules changed, set by inotify or a HUP signal */
- if (reload) {
- worker_kill(udev, 0);
- rules = udev_rules_unref(rules);
- udev_builtin_exit(udev);
- reload = 0;
- }
}
rc = EXIT_SUCCESS;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-01-30 15:45:57 +0000