adb-remount-test: Strengthen skip_administrative_mounts
Refactor skip_administrative_mounts so that it filters by device name,
mount point and filesystem type. (Was filtering by device name and mount
point.)
We need this because pseudo filesystems such as tmpfs and overlayfs can
have free-formed device name:
blah /mnt/mnt_point overlay ro,lowerdir=...
However the filesystem type (third field of /proc/mounts) must be
reflecting the actual filesystem, so to robustly filter out
administrative filesystems, we have to check the filesystem type field.
Bug: 188862155
Test: adb-remount-test.sh
Change-Id: I5058cbe8a36920f25b73a5d5833e9fc5a096e90f
diff --git a/fs_mgr/tests/adb-remount-test.sh b/fs_mgr/tests/adb-remount-test.sh
index 242fa93..0c5fe3d 100755
--- a/fs_mgr/tests/adb-remount-test.sh
+++ b/fs_mgr/tests/adb-remount-test.sh
@@ -735,23 +735,46 @@
fi
}
+[ "USAGE: join_with <delimiter> <strings>
+
+Joins strings with delimiter" ]
+join_with() {
+ if [ "${#}" -lt 2 ]; then
+ echo
+ return
+ fi
+ local delimiter="${1}"
+ local result="${2}"
+ shift 2
+ for element in "${@}"; do
+ result+="${delimiter}${element}"
+ done
+ echo "${result}"
+}
+
[ "USAGE: skip_administrative_mounts [data] < /proc/mounts
Filters out all administrative (eg: sysfs) mounts uninteresting to the test" ]
skip_administrative_mounts() {
+ local exclude_filesystems=(
+ "overlay" "tmpfs" "none" "sysfs" "proc" "selinuxfs" "debugfs" "bpf"
+ "binfmt_misc" "cg2_bpf" "pstore" "tracefs" "adb" "mtp" "ptp" "devpts"
+ "ramdumpfs" "binder" "securityfs" "functionfs" "rootfs"
+ )
+ local exclude_devices=(
+ "[/]sys[/]kernel[/]debug" "[/]data[/]media" "[/]dev[/]block[/]loop[0-9]*"
+ "${exclude_filesystems[@]}"
+ )
+ local exclude_mount_points=(
+ "[/]cache" "[/]mnt[/]scratch" "[/]mnt[/]vendor[/]persist" "[/]persist"
+ "[/]metadata"
+ )
if [ "data" = "${1}" ]; then
- grep -v " /data "
- else
- cat -
- fi |
- grep -v \
- -e "^\(overlay\|tmpfs\|none\|sysfs\|proc\|selinuxfs\|debugfs\|bpf\) " \
- -e "^\(binfmt_misc\|cg2_bpf\|pstore\|tracefs\|adb\|mtp\|ptp\|devpts\) " \
- -e "^\(ramdumpfs\|binder\|/sys/kernel/debug\|securityfs\) " \
- -e " functionfs " \
- -e "^\(/data/media\|/dev/block/loop[0-9]*\) " \
- -e "^rootfs / rootfs rw," \
- -e " /\(cache\|mnt/scratch\|mnt/vendor/persist\|persist\|metadata\) "
+ exclude_mount_points+=("[/]data")
+ fi
+ awk '$1 !~ /^('"$(join_with "|" "${exclude_devices[@]}")"')$/ &&
+ $2 !~ /^('"$(join_with "|" "${exclude_mount_points[@]}")"')$/ &&
+ $3 !~ /^('"$(join_with "|" "${exclude_filesystems[@]}")"')$/'
}
[ "USAGE: skip_unrelated_mounts < /proc/mounts
@@ -907,9 +930,11 @@
# Acquire list of system partitions
+# KISS (assume system partition mount point is "/<partition name>")
PARTITIONS=`adb_su cat /vendor/etc/fstab* </dev/null |
+ grep -v "^[#${SPACE}${TAB}]" |
skip_administrative_mounts |
- sed -n "s@^\([^ ${TAB}/][^ ${TAB}/]*\)[ ${TAB}].*[, ${TAB}]ro[, ${TAB}].*@\1@p" |
+ awk '$1 ~ /^[^/]+$/ && "/"$1 == $2 && $4 ~ /(^|,)ro(,|$)/ { print $1 }' |
sort -u |
tr '\n' ' '`
PARTITIONS="${PARTITIONS:-system vendor}"