s390/hypfs: include z/VM guests with access control group set

commit 663d34c8df98740f1e90241e78e456d00b3c6cad upstream.

Currently if z/VM guest is allowed to retrieve hypervisor performance
data globally for all guests (privilege class B) the query is formed in a
way to include all guests but the group name is left empty. This leads to
that z/VM guests which have access control group set not being included
in the results (even local vm).

Change the query group identifier from empty to "any" to retrieve
information about all guests from any groups (or without a group set).

Cc: stable@vger.kernel.org
Fixes: 31cb4bd31a48 ("[S390] Hypervisor filesystem (s390_hypfs) for z/VM")
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index 44feac38ccfc26dacaf57fae0463922bdafb10dd..7f53e40597f9698cc98c9b48febc56f80844f448 100644 (file)
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -19,6 +19,7 @@
 
 static char local_guest[] = "        ";
 static char all_guests[] = "*       ";
+static char *all_groups = all_guests;
 static char *guest_query;
 
 struct diag2fc_data {
@@ -61,10 +62,11 @@ static int diag2fc(int size, char* query, void *addr)
 
        memcpy(parm_list.userid, query, NAME_LEN);
        ASCEBC(parm_list.userid, NAME_LEN);
-       parm_list.addr = (unsigned long) addr ;
+       memcpy(parm_list.aci_grp, all_groups, NAME_LEN);
+       ASCEBC(parm_list.aci_grp, NAME_LEN);
+       parm_list.addr = (unsigned long)addr;
        parm_list.size = size;
        parm_list.fmt = 0x02;
-       memset(parm_list.aci_grp, 0x40, NAME_LEN);
        rc = -1;
 
        diag_stat_inc(DIAG_STAT_X2FC);