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authorKay Sievers <kay@vrfy.org>2014-06-04 12:16:28 +0200
committerKay Sievers <kay@vrfy.org>2014-06-04 12:21:44 +0200
commitf3a740a5dae792fb6b2d411022ce8c29ced1c3f1 (patch)
tree1decdd0ff053382ea0122a036e96280c6cae7c92 /src/udev/udevd.c
parent323a2f0b4b3db8f34c382e66f1940c1216bdfc9d (diff)
udev: synthesize "change' events for partitions when tools change the disk
This should make sure that fdisk-like programs will automatically cause an update of all partitions, just like mkfs-like programs cause an update of the partition.
Diffstat (limited to 'src/udev/udevd.c')
-rw-r--r--src/udev/udevd.c44
1 files changed, 42 insertions, 2 deletions
diff --git a/src/udev/udevd.c b/src/udev/udevd.c
index 59b5568fb6..6100d7d57a 100644
--- a/src/udev/udevd.c
+++ b/src/udev/udevd.c
@@ -46,6 +46,7 @@
#include <sys/utsname.h>
#include "udev.h"
+#include "udev-util.h"
#include "sd-daemon.h"
#include "cgroup-util.h"
#include "dev-setup.h"
@@ -733,15 +734,54 @@ out:
return udev_ctrl_connection_unref(ctrl_conn);
}
-static void synthesize_change(struct udev_device *dev) {
+static int synthesize_change(struct udev_device *dev) {
char filename[UTIL_PATH_SIZE];
+ int r;
log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
write_string_file(filename, "change");
+
+ /* for disks devices, re-trigger all partitions too */
+ if (streq_ptr("block", udev_device_get_subsystem(dev)) &&
+ streq_ptr("disk", udev_device_get_devtype(dev))) {
+ struct udev *udev = udev_device_get_udev(dev);
+ _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
+ struct udev_list_entry *item;
+
+ e = udev_enumerate_new(udev);
+ if (!e)
+ return -ENOMEM;
+
+ r = udev_enumerate_add_match_parent(e, dev);
+ if (r < 0)
+ return r;
+
+ r = udev_enumerate_add_match_subsystem(e, "block");
+ if (r < 0)
+ return r;
+
+ r = udev_enumerate_scan_devices(e);
+ udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+
+ d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
+ if (!d)
+ continue;
+
+ if (!streq_ptr("partition", udev_device_get_devtype(d)))
+ continue;
+
+ log_debug("device %s closed, synthesising partition '%s' 'change'",
+ udev_device_get_devnode(dev), udev_device_get_devnode(d));
+ strscpyl(filename, sizeof(filename), udev_device_get_syspath(d), "/uevent", NULL);
+ write_string_file(filename, "change");
+ }
+ }
+
+ return 0;
}
-/* read inotify messages */
static int handle_inotify(struct udev *udev)
{
int nbytes, pos;