[pve-devel] [PATCH manager v3 14/22] api: backup/vzdump: add permission check for fleecing storage

[Fiona Ebner <f.ebner@proxmox.com>]

Similar to how Datastore.AllocateSpace is required for the backup
storage, it should also be required for the fleecing storage.

Removing a fleecing storage from a job does not require more
permissions than for modifying the job.

Suggested-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---

Changes in v3:
    * avoid potential access of $fleecing=undef as a hash (for
      future-proofing, should not happen in practice).

 PVE/API2/Backup.pm | 10 ++++++++--
 PVE/API2/VZDump.pm |  9 +++++----
 PVE/VZDump.pm      |  2 +-
 3 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/PVE/API2/Backup.pm b/PVE/API2/Backup.pm
index 70753c2e..88140323 100644
--- a/PVE/API2/Backup.pm
+++ b/PVE/API2/Backup.pm
@@ -42,7 +42,7 @@ my $vzdump_job_id_prop = {
 
 # NOTE: also used by the vzdump API call.
 sub assert_param_permission_common {
-    my ($rpcenv, $user, $param) = @_;
+    my ($rpcenv, $user, $param, $is_delete) = @_;
     return if $user eq 'root@pam'; # always OK
 
     for my $key (qw(tmpdir dumpdir script)) {
@@ -52,6 +52,12 @@ sub assert_param_permission_common {
     if (grep { defined($param->{$_}) } qw(bwlimit ionice performance)) {
 	$rpcenv->check($user, "/", [ 'Sys.Modify' ]);
     }
+
+    if ($param->{fleecing} && !$is_delete) {
+	my $fleecing = PVE::VZDump::parse_fleecing($param) // {};
+	$rpcenv->check($user, "/storage/$fleecing->{storage}", [ 'Datastore.AllocateSpace' ])
+	    if $fleecing->{storage};
+    }
 }
 
 my sub assert_param_permission_create {
@@ -70,7 +76,7 @@ my sub assert_param_permission_update {
     return if $user eq 'root@pam'; # always OK
 
     assert_param_permission_common($rpcenv, $user, $update);
-    assert_param_permission_common($rpcenv, $user, $delete);
+    assert_param_permission_common($rpcenv, $user, $delete, 1);
 
     if ($update->{storage}) {
 	$rpcenv->check($user, "/storage/$update->{storage}", [ 'Datastore.Allocate' ])
diff --git a/PVE/API2/VZDump.pm b/PVE/API2/VZDump.pm
index f66fc740..7f92e7ec 100644
--- a/PVE/API2/VZDump.pm
+++ b/PVE/API2/VZDump.pm
@@ -41,10 +41,11 @@ __PACKAGE__->register_method ({
     description => "Create backup.",
     permissions => {
 	description => "The user needs 'VM.Backup' permissions on any VM, and "
-	    ."'Datastore.AllocateSpace' on the backup storage. The 'tmpdir', 'dumpdir' and "
-	    ."'script' parameters are restricted to the 'root\@pam' user. The 'maxfiles' and "
-	    ."'prune-backups' settings require 'Datastore.Allocate' on the backup storage. The "
-	    ."'bwlimit', 'performance' and 'ionice' parameters require 'Sys.Modify' on '/'. ",
+	    ."'Datastore.AllocateSpace' on the backup storage (and fleecing storage when fleecing "
+	    ."is used). The 'tmpdir', 'dumpdir' and 'script' parameters are restricted to the "
+	    ."'root\@pam' user. The 'maxfiles' and 'prune-backups' settings require "
+	    ."'Datastore.Allocate' on the backup storage. The 'bwlimit', 'performance' and "
+	    ."'ionice' parameters require 'Sys.Modify' on '/'.",
 	user => 'all',
     },
     protected => 1,
diff --git a/PVE/VZDump.pm b/PVE/VZDump.pm
index 812357bd..cde20624 100644
--- a/PVE/VZDump.pm
+++ b/PVE/VZDump.pm
@@ -130,7 +130,7 @@ my $generate_notes = sub {
     return $notes_template;
 };
 
-my sub parse_fleecing {
+sub parse_fleecing {
     my ($param) = @_;
 
     if (defined(my $fleecing = $param->{fleecing})) {
-- 
2.39.2