From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Use findmnt to determine if the passed-in argument is associated with a mount point, and if so, use spaceman to query the mounted filesystem. If the user passed in a file, try to find out if it's a loop mounted live filesystem and if so query the live filesystem. Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> --- debian/control | 2 +- spaceman/xfs_info.sh | 22 +++++++++++++++++++--- 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/debian/control b/debian/control index f4f807b0..0b3205f5 100644 --- a/debian/control +++ b/debian/control @@ -8,7 +8,7 @@ Standards-Version: 4.0.0 Homepage: https://xfs.wiki.kernel.org/ Package: xfsprogs -Depends: ${shlibs:Depends}, ${misc:Depends}, python3:any +Depends: ${shlibs:Depends}, ${misc:Depends}, python3:any, util-linux Provides: fsck-backend Suggests: xfsdump, acl, attr, quota Breaks: xfsdump (<< 3.0.0) diff --git a/spaceman/xfs_info.sh b/spaceman/xfs_info.sh index ecf17f61..1bf6d2c3 100755 --- a/spaceman/xfs_info.sh +++ b/spaceman/xfs_info.sh @@ -7,6 +7,14 @@ OPTS="" USAGE="Usage: xfs_info [-V] [-t mtab] [mountpoint|device|file]" +# Try to find a loop device associated with a file. We only want to return +# one loopdev (multiple loop devices can attach to a single file) so we grab +# the last line and return it if it's actually a block device. +try_find_loop_dev_for_file() { + local x="$(losetup -O NAME -j "$1" 2> /dev/null | tail -n 1)" + test -b "$x" && echo "$x" +} + while getopts "t:V" c do case $c in @@ -24,11 +32,19 @@ set -- extra "$@" shift $OPTIND case $# in 1) - if [ -b "$1" ] || [ -f "$1" ]; then - xfs_db -p xfs_info -c "info" $OPTS "$1" + arg="$1" + + # See if we can map the arg to a loop device + loopdev="$(try_find_loop_dev_for_file "${arg}")" + test -n "${loopdev}" && arg="${loopdev}" + + # If we find a mountpoint for the device, do a live query; + # otherwise try reading the fs with xfs_db. + if mountpt="$(findmnt -f -n -o TARGET "${arg}" 2> /dev/null)"; then + xfs_spaceman -p xfs_info -c "info" $OPTS "${mountpt}" status=$? else - xfs_spaceman -p xfs_info -c "info" $OPTS "$1" + xfs_db -p xfs_info -c "info" $OPTS "${arg}" status=$? fi ;;
