Can not force unmount child directory if underlying file system is unavailable when using nested mounts.
Article ID: 100021260
Updated On:
Resolution
ISSUE:
When using nested mounts, can not force unmount a child mount point if the parent mount point is force unmounted.
This problem is applicable to only VxFS 5.0MP3 (+ RP1 and RP2).
This problem is not applicable to earlier versions of VxFS.
ERROR CODE/ MESSAGE:
# umount -f /parent/child
UX:vxfs umount: ERROR: V-3-21704: cannot set force unmount for /parent/child: No such file or directory
REPRODUCTION STEPS:
# modinfo | grep vxportal
237 7b244f90 cb0 310 1 vxportal (VxFS 5.0_REV-5.0MP3RP1k_sol por)
# mount -F vxfs /dev/vx/dsk/testdg/vol01 /parent
# mount -F vxfs /dev/vx/dsk/testdg/vol02 /parent/child
# mount -v | grep parent
/dev/vx/dsk/testdg/vol01 on /parent type vxfs read/write/setuid/devices/delaylog/largefiles/qio/ioerror=mwdisable/dev=4e080e8 on Tue Jun 9 12:15:44 2009
/dev/vx/dsk/testdg/vol02 on /parent/child type vxfs read/write/setuid/devices/delaylog/largefiles/qio/ioerror=mwdisable/dev=4e080e9 on Tue Jun 9 12:15:59 2009
*** Force unmounting parent dir
# umount -f /parent
#
# mount -v | grep parent
/dev/vx/dsk/testdg/vol02 on /parent/child type vxfs read/write/setuid/devices/delaylog/largefiles/qio/ioerror=mwdisable/dev=4e080e9 on Tue Jun 9 12:12:27 2009
*** Force unmounting child dir fails...
# umount -f /dev/vx/dsk/testdg/vol02
UX:vxfs umount: ERROR: V-3-21704: cannot set force unmount for /parent/child: No such file or directory
# umount -f /parent/child
UX:vxfs umount: ERROR: V-3-21704: cannot set force unmount for /parent/child: No such file or directory
*** Normal unmount works ok.
# umount /parent/child
# mount -v | grep parent
#
CAUSE:
The problem is caused due to known defect tracked via e1417467 / e1713160 / e526580 (vxumount fails to force unmount a nested filesystem when the underlying filesystem is unavailable).
SOLUTION:
The fix for this issue is available via VxFS 5.0MP3RP1HF2. Please contact Veritas Technical Support to obtain this patch.
Issue/Introduction
Can not force unmount child directory if underlying file system is unavailable when using nested mounts.
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