tree 112418bed93240462d04e57596a949724d94a2ee
parent 39550a3652453ff02c84bc320d335cd5d613e265
author Satoshi Niwa <niwa@google.com> 1590557417 +0900
committer Satoshi Niwa <niwa@google.com> 1590564747 +0900

Use stat.st_dev for checking if two paths point at different filesystems

Comparing statvfs.f_fsid might be insufficient because
fsid is set to 0 on some filesystems.
For example, on ARC, fsid is 0 for both /storage (tmpfs)
and /storage/emulated/0 (FUSE).

stat.st_dev is device ID, so may not be persistent across
reboots but unique for comparison at runtime,
which is good enough for this purpose.

Bug: 157383101
Test: tast run eve-arc-r arc.DataCollector.vm
Change-Id: I220d9a6271a2234a8afe56f5a86d4f725c3963fe