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c9c2a0a8be
Any shell scripts that have been modified for Unraid should have the correct `#!/bin/bash` shebang to aid with linting.
117 lines
3.9 KiB
Bash
Executable File
117 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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#Copyright 2005-2021, Lime Technology
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#License: GPLv2 only
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# mount_image filepath mountpoint size
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# If filepath ends in ".img" extension, we (first create if necessary and then) mount filepath
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# as a loopback filesystem. For create, size is the initial size in GiB to fallocate for filepath,
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# subsequently, size indicates a possibly larger size to extend filepath. filepath is then
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# mounted onto mountpoint.
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# The filesystem created when we create a loopback file specified using a filename suffix. If
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# suffix is "-xfs" then we create xfs filesystem. If no suffix or suffix is "-btrfs" then we
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# create a btrfs filesystem.
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# If filepath does not end in ".img" extension, we assume filepath refers to a directory which
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# we will bind-mount onto mountpath. The size parameter is not required in this case.
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FILEPATH=$1
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FILESIZE=$3
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MOUNTPOINT=$2
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# if filepath does not end in .img then this is a directory to be bind-mounted.
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if [[ "${FILEPATH:(-4)}" != ".img" ]]; then
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if ! mkdir -p "$FILEPATH" 2>/dev/null ; then
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echo "Cannot create '$FILEPATH' or is not a directory"
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exit 1
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fi
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# if filepath is located on a "user share" dereference to get real device path
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DISK=$(getfattr -n system.LOCATION --only-values --absolute-names "$FILEPATH" 2>/dev/null)
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if [[ $DISK != "" ]]; then
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FILEPATH=${FILEPATH/user/$DISK}
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fi
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mount --bind "$FILEPATH" "$MOUNTPOINT"
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exit
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fi
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# if filepath ends in .img then file name suffix indicates xfs or btrfs
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if [[ "${FILEPATH:(-8)}" = "-xfs.img" ]]; then
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MAKEFS="mkfs.xfs -n ftype=1"
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GROWFS="xfs_growfs"
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MOUNTFS="mount -o noatime"
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else
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MAKEFS="mkfs.btrfs"
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GROWFS="btrfs filesystem resize max"
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MOUNTFS="mount -o noatime,space_cache=v2"
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fi
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# if no image file we'll create one
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if [[ ! -e "$FILEPATH" ]]; then
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echo "Creating new image file: '$FILEPATH' size: ${FILESIZE}G"
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# ensure parent path exists
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mkdir -p "$(dirname "$FILEPATH")"
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# create 0-length file so we can set NOCOW attribute on the new file and then extend size of file
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touch "$FILEPATH"
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# if image file is located on a "user share" dereference to get real device path
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DISK=$(getfattr -n system.LOCATION --only-values --absolute-names "$FILEPATH" 2>/dev/null)
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if [[ $DISK != "" ]]; then
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FILEPATH=${FILEPATH/user/$DISK}
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fi
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# setting NOCOW attribute will fail if not btrfs/xfs, but so what?
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chattr +C "$FILEPATH" 2>/dev/null
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# try to use fallocate first
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if ! fallocate -l ${FILESIZE}G "$FILEPATH" 2>/dev/null ; then
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# try truncate
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if ! truncate -s +${FILESIZE}G "$FILEPATH" 2>/dev/null ; then
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echo "failed to create image file"
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rm -f "$FILEPATH" 2>/dev/null
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exit 1
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fi
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fi
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# set ownership
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chown nobody:users "$FILEPATH"
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# create file system in the image file
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if ! $MAKEFS "$FILEPATH" ; then
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echo "failed to create file system"
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rm -f "$FILEPATH" 2>/dev/null
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exit 1
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fi
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# mount
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if ! $MOUNTFS "$FILEPATH" "$MOUNTPOINT" ; then
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echo "mount error"
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rm -f "$FILEPATH" 2>/dev/null
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exit 1
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fi
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else
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# exists, check that it's a regular file
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if [[ ! -f "$FILEPATH" ]]; then
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echo "'$FILEPATH' is not a file"
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exit 1
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fi
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# check that the file is not already in-use (or being moved by 'mover')
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if /usr/local/sbin/in_use "$FILEPATH" ; then
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echo "'$FILEPATH' is in-use, cannot mount"
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exit 1
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fi
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# if image file is located on a "user share" dereference to get real device path
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DISK=$(getfattr -n system.LOCATION --only-values --absolute-names "$FILEPATH" 2>/dev/null)
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if [[ $DISK != "" ]]; then
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FILEPATH=${FILEPATH/user/$DISK}
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fi
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# (maybe) extend file size
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# try to use fallocate first, will never make the file smaller
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if ! fallocate -l ${FILESIZE}G "$FILEPATH" 2>/dev/null ; then
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# try truncate
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truncate -s \>${FILESIZE}G "$FILEPATH"
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fi
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# mount
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if ! $MOUNTFS "$FILEPATH" "$MOUNTPOINT" ; then
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echo "mount error"
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exit 1
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fi
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# (maybe) extend file system size
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$GROWFS "$MOUNTPOINT"
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fi
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exit 0
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