add Storage::get_bandwidth_limit helper

Takes an operation, an optional requested bandwidth
limit override, and a list of storages involved in the
operation and lowers the requested bandwidth against global
and storage-specific limits unless the user has permissions
to change those.
This means:
 * Global limits apply to all users without Sys.Modify on /
   (as they can change datacenter.cfg options via the API).
 * Storage specific limits apply to users without
   Datastore.Allocate access on /storage/X for any involved
   storage X.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

PVE/Storage/DRBDPlugin.pm

@@ -45,6 +45,7 @@ sub options {
 	content => { optional => 1 },
         nodes => { optional => 1 },
 	disable => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/DirPlugin.pm

@@ -42,6 +42,7 @@ sub properties {
 	    type => 'string',
 	    default => 'no',
 	},
+	bwlimit => get_standard_option('bwlimit'),
     };
 }
 
@@ -56,6 +57,7 @@ sub options {
 	format => { optional => 1 },
 	mkdir => { optional => 1 },
 	is_mountpoint => { optional => 1 },
+	bwlimit => { optional => 1 },
    };
 }
 

PVE/Storage/GlusterfsPlugin.pm

@@ -136,6 +136,7 @@ sub options {
 	content => { optional => 1 },
 	format => { optional => 1 },
 	mkdir => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/ISCSIDirectPlugin.pm

@@ -68,6 +68,7 @@ sub options {
         nodes => { optional => 1},
         disable => { optional => 1},
         content => { optional => 1},
+        bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/ISCSIPlugin.pm

@@ -261,6 +261,7 @@ sub options {
         nodes => { optional => 1},
 	disable => { optional => 1},
 	content => { optional => 1},
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/LVMPlugin.pm

@@ -202,6 +202,7 @@ sub options {
 	content => { optional => 1 },
 	base => { fixed => 1, optional => 1 },
 	tagged_only => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/LvmThinPlugin.pm

@@ -49,6 +49,7 @@ sub options {
         nodes => { optional => 1 },
 	disable => { optional => 1 },
 	content => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/NFSPlugin.pm

@@ -86,6 +86,7 @@ sub options {
 	content => { optional => 1 },
 	format => { optional => 1 },
 	mkdir => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/RBDPlugin.pm

@@ -278,6 +278,7 @@ sub options {
 	username => { optional => 1 },
 	content => { optional => 1 },
 	krbd => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/SheepdogPlugin.pm

@@ -115,6 +115,7 @@ sub options {
         disable => { optional => 1 },
 	portal => { fixed => 1 },
 	content => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/ZFSPlugin.pm

@@ -205,6 +205,7 @@ sub options {
 	comstar_hg => { optional => 1 },
 	comstar_tg => { optional => 1 },
 	content => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }
 

PVE/Storage/ZFSPoolPlugin.pm

@@ -43,6 +43,7 @@ sub options {
 	nodes => { optional => 1 },
 	disable => { optional => 1 },
 	content => { optional => 1 },
+	bwlimit => { optional => 1 },
     };
 }