1 files changed, 105 insertions, 0 deletions
diff --git a/debian/patches/udevadm-settle.patch b/debian/patches/udevadm-settle.patch
new file mode 100644
index 0000000..96cdbcf
--- /dev/null
+++ b/debian/patches/udevadm-settle.patch
@@ -0,0 +1,105 @@
+From 3947abeeb92069705229bff681b28d8ac78aedaa Mon Sep 17 00:00:00 2001
+From: Colin Watson <cjwatson@ubuntu.com>
+Date: Fri, 28 Mar 2014 17:10:16 +0000
+Subject: udev handling
+
+Run udevadm settle around partition table rereads, to avoid races.
+
+This should be replaced by a proper completion-notification mechanism
+between the kernel and udev.
+
+Forwarded: no
+Last-Update: 2019-10-11
+
+Patch-Name: udevadm-settle.patch
+---
+ libparted/arch/linux.c | 56 ++++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 54 insertions(+), 2 deletions(-)
+
+diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c
+index ccbba865..f6f72360 100644
+--- a/libparted/arch/linux.c
++++ b/libparted/arch/linux.c
+@@ -26,6 +26,7 @@
+ #include <parted/fdasd.h>
+ #endif
+ 
++#include <stdlib.h>
+ #include <ctype.h>
+ #include <errno.h>
+ #include <fcntl.h>
+@@ -3250,10 +3251,52 @@ _have_blkpg ()
+         return have_blkpg = kver >= KERNEL_VERSION (2,4,0) ? 1 : 0;
+ }
+ 
++static int
++_chrooted ()
++{
++        static int cached = -1;
++        struct stat root, init_root;
++
++        if (cached != -1)
++                return cached;
++
++        if (stat ("/", &root) || stat ("/proc/1/root", &init_root))
++                /* We can't tell, but are unlikely to be able to tell in the
++                 * future either.
++                 */
++                cached = 0;
++        else if (root.st_dev == init_root.st_dev &&
++                 root.st_ino == init_root.st_ino)
++                /* / has the same dev/ino as /sbin/init's root, so we're not
++                 * in a chroot.
++                 */
++                cached = 0;
++        else
++                /* We must be in a chroot. */
++                cached = 1;
++
++        return cached;
++}
++
+ /* Return nonzero upon success, 0 if something fails.  */
+ static int
+ linux_disk_commit (PedDisk* disk)
+ {
++        int ret = 1;
++
++        /* Modern versions of udev may notice the write activity on
++         * partition devices caused by _flush_cache, and may decide to
++         * synthesise some change events as a result. These may in turn run
++         * programs that open partition devices, which will race with us
++         * trying to remove those devices. To avoid this, we need to wait
++         * until udevd has finished processing its event queue.
++         * TODO: for upstream submission, this should check whether udevadm
++         * exists on $PATH.
++         */
++        if (!_chrooted () && system ("udevadm settle") != 0) {
++                /* ignore failures */
++        }
++
+         if (disk->dev->type != PED_DEVICE_FILE) {
+ 
+                 /* We now require BLKPG support.  If this assertion fails,
+@@ -3263,10 +3306,19 @@ linux_disk_commit (PedDisk* disk)
+                 assert (_have_blkpg ());
+ 
+                 if (!_disk_sync_part_table (disk))
+-                        return 0;
++                        ret = 0;
+         }
+ 
+-        return 1;
++        /* Now we wait for udevd to finish creating device nodes based on
++         * the above activity, so that callers can reliably use them.
++         * TODO: for upstream submission, this should check whether udevadm
++         * exists on $PATH.
++         */
++        if (!_chrooted () && system ("udevadm settle") != 0) {
++                /* ignore failures */
++        }
++
++        return ret;
+ }
+ 
+ #if USE_BLKID