From 2913d9df16123e2453eacd24c3b3e1029887c21c Mon Sep 17 00:00:00 2001 From: Doug Ledford Date: Tue, 20 Jul 2010 12:18:12 -0400 Subject: [PATCH] udev rules: add watch option The watch option to udev tells udev to watch our mdadm device file for close events and on a close it rechecks the device. This means that if, for example, we use mdadm to --grow the array from a 4 disk to 5 disk array, when mdadm closes the array, udev will re-read the superblock and update its internal database with the new information. This can also be used to cause udev to create new device special files if, for example, a partitioning program is used to modify the partition table on the actual md device and that program does not call the syscall to reread the partition table. Signed-off-by: Doug Ledford --- udev-md-raid.rules | 1 + 1 file changed, 1 insertion(+) diff --git a/udev-md-raid.rules b/udev-md-raid.rules index da52058f..f9607f37 100644 --- a/udev-md-raid.rules +++ b/udev-md-raid.rules @@ -32,6 +32,7 @@ ENV{DEVTYPE}=="partition", ENV{MD_DEVNAME}=="*[0-9]", SYMLINK+="md/$env{MD_DEVNA IMPORT{program}="/sbin/blkid -o udev -p $tempnode" OPTIONS+="link_priority=100" +OPTIONS+="watch" ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}" ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}" -- 2.39.2