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Updates for libvirt image removal and use diretory #1722

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8b495f8
Updates for image removal
SimonFair May 8, 2024
6663975
Update VMSettings.page
SimonFair May 8, 2024
12da995
Update rc.libvirt
SimonFair May 8, 2024
81dd45a
Add libvirt_update script
SimonFair May 9, 2024
c1cf813
Make script executable
SimonFair May 9, 2024
ea49630
Update rc.libvirt
SimonFair May 10, 2024
f2822c7
Changes to VM Settings
SimonFair Apr 19, 2025
28ec848
revert rc.libvirt changes
SimonFair Apr 19, 2025
de53cf4
Initial moving libvirt image to folder and vice versa.
SimonFair Apr 20, 2025
3ffebdf
Update help text
SimonFair Apr 20, 2025
a9d8167
Merge remote-tracking branch 'upstream/master' into Remove-Vm-Image
SimonFair May 6, 2025
7b03382
Remove secondary path.
SimonFair May 6, 2025
fca221a
Remove secondary code.
SimonFair May 6, 2025
d5d3bad
Merge remote-tracking branch 'upstream/master' into Remove-Vm-Image
SimonFair Oct 24, 2025
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26 changes: 23 additions & 3 deletions emhttp/plugins/dynamix.vm.manager/VMSettings.page
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@ $libvirt_log = file_exists("/var/log/libvirt/libvirtd.log");
<input type="hidden" name="#file" value="<?=htmlspecialchars($domain_cfgfile)?>">
<input type="hidden" name="#command" value="/plugins/dynamix/scripts/emcmd">
<input type="hidden" name="#arg[1]" value="cmdStatus=Apply">
<input type="hidden" id="OLD_IMAGE_FILE" name="OLD_IMAGE_FILE" value="<?=htmlspecialchars($domain_cfg['IMAGE_FILE']);?>">
_(Enable VMs)_:
: <select id="SERVICE" name="SERVICE">
<?= mk_option($libvirt_service, 'disable', _('No'))?>
Expand Down Expand Up @@ -97,6 +98,7 @@ _(Disable Autostart/Start option for VMs)_:
<?if ($libvirt_up):?>
<?$libvirt_info = libvirt_version('libvirt')?>
<?$qemu_info = $lv->get_connect_information()?>

_(Libvirt version)_:
: <?=$libvirt_info['libvirt.major'].'.'.$libvirt_info['libvirt.minor'].'.'.$libvirt_info['libvirt.release']?>

Expand All @@ -108,24 +110,38 @@ _(Libvirt storage location)_:

:vms_libvirt_volume_help:

_(Libvirt secondary storage location)_:
: <?=htmlspecialchars($domain_cfg['IMAGE_FILE_SECONDARY'])."Test"?>

:vms_libvirt_secondary_volume_help:


<?else: /* Libvirt is stopped */ ?>
_(Libvirt vdisk size)_:
: <input type="number" id="IMAGE_SIZE" name="IMAGE_SIZE" min="1" value="<?=htmlspecialchars($domain_cfg['IMAGE_SIZE']);?>" style="width:50px;" required="required" />_(GB)_ <span id="SIZE_ERROR" class="errortext"></span>

:vms_libvirt_vdisk_size_help:

_(Libvirt storage location)_:
: <input type="text" id="IMAGE_FILE" name="IMAGE_FILE" autocomplete="off" spellcheck="false" value="<?=htmlspecialchars($domain_cfg['IMAGE_FILE']);?>" placeholder="e.g. /mnt/user/system/libvirt/libvirt.img" data-pickcloseonfile="true" data-pickfilter="img" data-pickroot="/mnt" data-pickfolders="true" required pattern="^[^\\]*libvirt\.img$">
: <input type="text" id="IMAGE_FILE" name="IMAGE_FILE" autocomplete="off" spellcheck="false" value="<?=htmlspecialchars($domain_cfg['IMAGE_FILE']);?>" placeholder="e.g. /mnt/user/system/libvirt/libvirt.img" data-pickcloseonfile="true" data-pickfilter="img" data-pickroot="/mnt" data-pickfolders="true" >
<?if (file_exists($domain_cfg['IMAGE_FILE'])):?><span id="deletePanel"><label><input type="checkbox" id="deleteCheckbox" /> _(Delete Image File)_</label></span><?endif;?>
<?if (!$started):?><span><i class="fa fa-warning icon warning"></i> _(Modify with caution: unable to validate path until Array is Started)_</span>
<?elseif (!is_dir(dirname($domain_cfg['IMAGE_FILE']))):?><span><i class="fa fa-warning icon warning"></i> _(Path does not exist)_</span>
<?endif;?><span id="IMAGE_ERROR" class="errortext"></span>

:vms_libvirt_location_help:

_(Libvirt secondary storage location)_:
: <input type="text" id="IMAGE_FILE_SECONDARY" name="IMAGE_FILE_SECONDARY" autocomplete="off" spellcheck="false" value="<?=htmlspecialchars($domain_cfg['IMAGE_FILE_SECONDARY']);?>" placeholder="e.g. /mnt/user/system/libvirt/libvirt.img" data-pickcloseonfile="true" data-pickfilter="img" data-pickroot="/mnt" data-pickfolders="true" >
<?if (!$started):?><span><i class="fa fa-warning icon warning"></i> _(Modify with caution: unable to validate path until Array is Started)_</span>
<?elseif (!is_dir(dirname($domain_cfg['IMAGE_FILE_SECONDARY']))):?><span><i class="fa fa-warning icon warning"></i> _(Path does not exist)_</span>
<?endif;?><span id="IMAGE_ERROR_SECONDARY" class="errortext"></span>

:vms_libvirt_secondary_location_help:

<?endif;?>
_(Default VM storage path)_:
: <input type="text" id="domaindir" name="DOMAINDIR" autocomplete="off" spellcheck="false" data-pickfolders="true" data-pickfilter="HIDE_FILES_FILTER" data-pickroot="/mnt" value="<?=htmlspecialchars($domain_cfg['DOMAINDIR'])?>" placeholder="_(Click to Select)_" pattern="^[^\\]*/$">
: <input type="text" id="domaindir" name="DOMAINDIR" autocomplete="off" spellcheck="false" data-pickfolders="true" data-pickfilter="HIDE_FILES_FILTER" data-pickroot="<?=is_dir('/mnt/user')?'/mnt/user':'/mnt'?>" value="<?=htmlspecialchars($domain_cfg['DOMAINDIR'])?>" placeholder="_(Click to Select)_" pattern="^[^\\]*/$">
<?if (!$started):?><span><i class="fa fa-warning icon warning"></i> _(Modify with caution: unable to validate path until Array is Started)_</span>
<?elseif (!is_dir($domain_cfg['DOMAINDIR'])):?><span><i class="fa fa-warning icon warning"></i> _(Path does not exist)_</span><?endif;?>

Expand Down Expand Up @@ -231,7 +247,7 @@ _(VFIO allow unsafe interrupts)_:

<?endif;?>

<?if ($libvirt_up && trim(shell_exec('stat -c %T -f /etc/libvirt'))=='btrfs'):?>
<?if ($libvirt_up && trim(shell_exec('stat -c %T -f /etc/libvirt'))=='btrfs' && strpos($domain_cfg['IMAGE_FILE'],".img")) :?>
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@coderabbitai coderabbitai bot Oct 24, 2025

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⚠️ Potential issue | 🟡 Minor

Fix imprecise string matching for .img check.

The condition strpos($domain_cfg['IMAGE_FILE'],".img") has potential issues:

  1. It will return false when ".img" is at position 0, though this is unlikely for a path
  2. More importantly, it will match ".img" appearing anywhere in the path, including in directory names (e.g., /mnt/user/my.images/libvirt/ or /path/.img-backup/libvirt/)

Since the intent is to show this section only for image files (not directories), consider using a more precise check:

-<?if ($libvirt_up && trim(shell_exec('stat -c %T -f /etc/libvirt'))=='btrfs' && strpos($domain_cfg['IMAGE_FILE'],".img")) :?>
+<?if ($libvirt_up && trim(shell_exec('stat -c %T -f /etc/libvirt'))=='btrfs' && substr($domain_cfg['IMAGE_FILE'], -4) === '.img') :?>

This checks if the path ends with .img rather than containing it anywhere.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
<?if ($libvirt_up && trim(shell_exec('stat -c %T -f /etc/libvirt'))=='btrfs' && strpos($domain_cfg['IMAGE_FILE'],".img")) :?>
<?if ($libvirt_up && trim(shell_exec('stat -c %T -f /etc/libvirt'))=='btrfs' && substr($domain_cfg['IMAGE_FILE'], -4) === '.img') :?>
🤖 Prompt for AI Agents 
In emhttp/plugins/dynamix.vm.manager/VMSettings.page around line 303, the
current check strpos($domain_cfg['IMAGE_FILE'],".img") is imprecise (matches
anywhere and fails when at position 0); replace it with an end-of-string match
to ensure the path is an image file — for example, use a case-insensitive regex
or a suffix check such as preg_match('/\.img$/i',
trim($domain_cfg['IMAGE_FILE'])) or
strtolower(substr(trim($domain_cfg['IMAGE_FILE']), -4)) === '.img' so only paths
that actually end with ".img" trigger the condition.

<div class="advanced" markdown="1">
<div class="title"><span class="left"><i class="title fa fa-list"></i>_(Libvirt volume info)_</span></div>
_(btrfs filesystem show)_:
Expand Down Expand Up @@ -426,6 +442,9 @@ $(function(){
$("#IMAGE_FILE").fileTreeAttach(null, null, function(folder) {
$("#IMAGE_FILE").val(folder + 'libvirt.img').change();
});
$("#IMAGE_FILE_SECONDARY").fileTreeAttach(null, null, function(folder) {
$("#IMAGE_FILE_SECONDARY").val(folder + 'libvirt.img').change();
});
$('#domaindir').fileTreeAttach();
$('#mediadir').fileTreeAttach();
$('#winvirtio').fileTreeAttach();
Expand All @@ -449,6 +468,7 @@ $(function(){
$("#SERVICE").prop("disabled", checked).val('disable');
$("#IMAGE_SIZE").prop("disabled", checked);
$("#IMAGE_FILE").prop("disabled", checked).val("<?=$domain_cfg['IMAGE_FILE']?>");
$("#IMAGE_FILE_SECONDARY").prop("disabled");
$("#domaindir").prop("disabled", checked);
$("#mediadir").prop("disabled", checked);
$("#winvirtio_select").prop("disabled", checked);
Expand Down
58 changes: 58 additions & 0 deletions emhttp/plugins/dynamix.vm.manager/scripts/libvirt_init
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,64 @@
# run & log functions
. /etc/rc.d/rc.runlog


# Sync domain data if IMAGE_FILE and OLD_IMAGE_FILE differ
DOMAIN_CFG=/boot/config/domain.cfg

# Read values from domain.cfg
eval $(grep -E '^(IMAGE_FILE|OLD_IMAGE_FILE)=' "$DOMAIN_CFG")

# Remove quotes
IMAGE_FILE="${IMAGE_FILE%\"}"
IMAGE_FILE="${IMAGE_FILE#\"}"
OLD_IMAGE_FILE="${OLD_IMAGE_FILE%\"}"
OLD_IMAGE_FILE="${OLD_IMAGE_FILE#\"}"

# Proceed only if both variables are set and OLD_IMAGE_FILE exists
if [ -n "$IMAGE_FILE" ] && [ -n "$OLD_IMAGE_FILE" ] && [ "$IMAGE_FILE" != "$OLD_IMAGE_FILE" ]; then
if [ ! -e "$OLD_IMAGE_FILE" ]; then
log "OLD_IMAGE_FILE not found: $OLD_IMAGE_FILE — skipping sync"
else
log "IMAGE_FILE and OLD_IMAGE_FILE differ, syncing..."

TMP_MNT=/etc/libvirt-sync
IMG_FILE_NAME=$(basename "$IMAGE_FILE")
OLD_IMG_FILE_NAME=$(basename "$OLD_IMAGE_FILE")
TIMESTAMP=$(date +%Y%m%d-%H%M%S)

if [[ "$OLD_IMAGE_FILE" == *.img ]]; then
# Backup image before mounting
BACKUP_PATH="${OLD_IMAGE_FILE%.img}.bak-${TIMESTAMP}.img"
log "Creating backup of OLD_IMAGE_FILE: $BACKUP_PATH"
cp -p "$OLD_IMAGE_FILE" "$BACKUP_PATH"

log "Mounting $OLD_IMAGE_FILE to $TMP_MNT"
mkdir -p "$TMP_MNT"
mount "$OLD_IMAGE_FILE" "$TMP_MNT"
log "Copying full contents from image to directory $IMAGE_FILE"
rsync -a --exclude="$OLD_IMG_FILE_NAME" "$TMP_MNT/" "$IMAGE_FILE/"
umount "$TMP_MNT"
elif [[ "$IMAGE_FILE" == *.img ]]; then
log "Mounting $IMAGE_FILE to $TMP_MNT"
mkdir -p "$TMP_MNT"
mount "$IMAGE_FILE" "$TMP_MNT"
log "Copying full contents from directory $OLD_IMAGE_FILE to image"
rsync -a --exclude="$IMG_FILE_NAME" --exclude='*.bak-*.img' "$OLD_IMAGE_FILE/" "$TMP_MNT/"
umount "$TMP_MNT"
else
log "Both IMAGE_FILE and OLD_IMAGE_FILE are directories, copying full contents"
rsync -a --exclude="$IMG_FILE_NAME" "$OLD_IMAGE_FILE/" "$IMAGE_FILE/"
fi

# Update OLD_IMAGE_FILE in domain.cfg
log "Updating OLD_IMAGE_FILE in $DOMAIN_CFG"
sed -i "s|^OLD_IMAGE_FILE=.*|OLD_IMAGE_FILE=\"$IMAGE_FILE\"|" "$DOMAIN_CFG"
fi
else
log "IMAGE_FILE and OLD_IMAGE_FILE match, or one is unset — skipping sync"
fi


# missing qemu directory would indicate new libvirt image file created
if [ ! -d /etc/libvirt/qemu ]; then
log "initializing /etc/libvirt"
Expand Down
3 changes: 2 additions & 1 deletion emhttp/plugins/dynamix.vm.manager/scripts/libvirtconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,8 @@
$cfgfile = "/boot/config/domain.cfg";
$cfg_defaults = [
"SERVICE" => "disable",
"IMAGE_FILE" => "/mnt/user/system/libvirt/libvirt.img",
"IMAGE_FILE" => "/mnt/user/system/libvirt/",
"OLD_IMAGE_FILE" => "/mnt/user/system/libvirt/",
"IMAGE_SIZE" => "1",
"DEBUG" => "no",
"DOMAINDIR" => "/mnt/user/domains/",
Expand Down