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Vitaly Kuznetsov 07136793cc Tools: hv: vss: fix loop device detection 
Commit ea81fdf098 ("Tools: hv: vss: Skip freezing filesystems backed by
loop") added skip for filesystems backed by loop device. However, it seems
the detection of such cases is incomplete.

It was found that with 'devicemapper' storage driver docker creates the
following chain:

NAME					MAJ:MIN
loop0					7:0
..docker-8:4-8473394-pool		253:0
  ..docker-8:4-8473394-eac...		253:1

so when we're looking at the mounted device we see major '253' and not '7'.

Solve the issue by walking /sys/dev/block/*/slaves chain and checking if
there's a loop device somewhere.

Other than that, don't skip mountpoints silently when stat() fails. In case
e.g. SELinux is failing stat we don't want to skip freezing everything
without letting user know about the failure.

Fixes: ea81fdf098 ("Tools: hv: vss: Skip freezing filesystems backed by loop")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-03 13:02:33 +02:00
..
accounting
arch tools headers: Sync x86 cpufeatures.h with the kernel sources 2018-06-01 16:13:16 -03:00
bpf tools: bpftool: improve accuracy of load time 2018-06-15 03:13:17 +02:00
build Kbuild: fix # escaping in .cmd files for future Make 2018-04-11 00:03:02 +09:00
cgroup
firewire
gpio Linux 4.16-rc5 2018-03-18 17:48:59 +01:00
hv Tools: hv: vss: fix loop device detection 2018-07-03 13:02:33 +02:00
iio tools: iio: iio_generic_buffer: allow continuous looping 2018-05-20 14:55:58 +01:00
include docs: Fix some broken references 2018-06-15 18:10:01 -03:00
kvm/kvm_stat tools/kvm_stat: Remove unused function 2018-03-28 22:47:06 +02:00
laptop
leds
lib docs: Fix some broken references 2018-06-15 18:10:01 -03:00
memory-model tools/memory-model: Add reference for 'Simplifying ARM concurrency' 2018-05-15 08:11:19 +02:00
nfsd
objtool objtool: Add machine_real_restart() to the noreturn list 2018-06-20 02:10:37 +02:00
pci
pcmcia
perf Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-24 20:29:15 +08:00
power Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2018-06-21 00:37:04 +02:00
scripts Kbuild: fix # escaping in .cmd files for future Make 2018-04-11 00:03:02 +09:00
spi
testing Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-24 20:18:19 +08:00
thermal/tmon tools/thermal: tmon: fix for segfault 2018-03-27 09:51:23 +02:00
time
usb usbip: usbip_detach: fix to check for invalid ports 2018-05-31 12:44:39 +02:00
virtio PCI: remove PCI_DMA_BUS_IS_PHYS 2018-05-07 07:15:41 +02:00
vm mm: mark pages in use for page tables 2018-06-07 17:34:37 -07:00
wmi
Makefile