[PATCH v2] Fix the sync issue for dump_fs
Previously the sync for dump_fs is problematic, it always
return success according to man 2 sync. So it cannot detect
the error of the dump target is full and not all of vmcore
data been written back the disk, which will leave the vmcore
imcomplete and report misleading log as "saving vmcore
complete".
In this patch, we will use "sync -f vmcore" instead, which
will return error if syncfs on the dump target fails. In
this way, vmcore sync related failures, such as autoextend
of lvm2 thinpool fails, can be detected and handled properly.
Signed-off-by: Tao Liu <ltao(a)redhat.com>
v1 -> v2:
make "sync -f" against vmcore-incomplete.
---
dracut-kdump.sh | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/dracut-kdump.sh b/dracut-kdump.sh
index f4456a1..4852c01 100755
--- a/dracut-kdump.sh
+++ b/dracut-kdump.sh
@@ -174,9 +174,15 @@ dump_fs()
$CORE_COLLECTOR /proc/vmcore "$_dump_fs_path/vmcore-incomplete"
_dump_exitcode=$?
if [ $_dump_exitcode -eq 0 ]; then
- mv "$_dump_fs_path/vmcore-incomplete" "$_dump_fs_path/vmcore"
- sync
- dinfo "saving vmcore complete"
+ sync -f "$_dump_fs_path/vmcore-incomplete"
+ _sync_exitcode=$?
+ if [ $_sync_exitcode -eq 0 ]; then
+ mv "$_dump_fs_path/vmcore-incomplete" "$_dump_fs_path/vmcore"
+ dinfo "saving vmcore complete"
+ else
+ derror "sync vmcore failed, exitcode:$_sync_exitcode"
+ return 1
+ fi
else
derror "saving vmcore failed, exitcode:$_dump_exitcode"
return 1
--
2.33.1