[pve-devel] [PATCH container] fix #4470: pct fstrim: ignore bind or read-only mountpoints

[Friedrich Weber]

Currently, `pct fstrim` will run `fstrim` on all mountpoints
of the container, including bind and read-only mountpoints.

However, trimming a bind mountpoint might trim a host
filesystem, which users may not expect. Also, trimming can
be considered a write operation, which users may not expect
to be carried out on a read-only mountpoint.

Hence, exclude bind mointpoints and read-only mountpoints
from trimming.

Signed-off-by: Friedrich Weber <f.weber at proxmox.com>
---
 src/PVE/CLI/pct.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/PVE/CLI/pct.pm b/src/PVE/CLI/pct.pm
index 3ade2ba..d559d00 100755
--- a/src/PVE/CLI/pct.pm
+++ b/src/PVE/CLI/pct.pm
@@ -763,7 +763,7 @@ __PACKAGE__->register_method ({
     name => 'fstrim',
     path => 'fstrim',
     method => 'POST',
-    description => "Run fstrim on a chosen CT and its mountpoints.",
+    description => "Run fstrim on a chosen CT and its mountpoints, except bind or read-only mountpoints.",
     parameters => {
 	additionalProperties => 0,
 	properties => {
@@ -791,6 +791,7 @@ __PACKAGE__->register_method ({
 	    PVE::LXC::Config->foreach_volume($conf, sub {
 		my ($name, $mp) = @_;
 		$path = $mp->{mp};
+		return if $mp->{type} eq 'bind' || $mp->{ro};
 		return if $param->{'ignore-mountpoints'} && $name =~ /^mp\d+/;
 		my $cmd = ["fstrim", "-v", "$rootdir$path"];
 		PVE::Tools::run_command($cmd, noerr => 1);
-- 
2.30.2