util: Remove cbm_mask from virResctrlInfoPerType

It was used just temporarily to do a calculation, no need to keep that around.
Also use virBitmap in the code instead of reimplementing two of its existing
functions.  And move the counting part next to where the value is read.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/util/virresctrl.c

@@ -24,8 +24,6 @@
 #include <fcntl.h>
 
 #include "virresctrlpriv.h"
-#include "c-ctype.h"
-#include "count-one-bits.h"
 #include "viralloc.h"
 #include "virfile.h"
 #include "virlog.h"
@@ -97,7 +95,6 @@ static virClassPtr virResctrlAllocClass;
 /* virResctrlInfo */
 struct _virResctrlInfoPerType {
     /* Kernel-provided information */
-    char *cbm_mask;
     unsigned int min_cbm_bits;
 
     /* Our computed information from the above */
@@ -142,11 +139,8 @@ virResctrlInfoDispose(void *obj)
             continue;
 
         if (level->types) {
-            for (j = 0; j < VIR_CACHE_TYPE_LAST; j++) {
-                if (level->types[j])
-                    VIR_FREE(level->types[j]->cbm_mask);
+            for (j = 0; j < VIR_CACHE_TYPE_LAST; j++)
                 VIR_FREE(level->types[j]);
-            }
         }
         VIR_FREE(level->types);
         VIR_FREE(level);
@@ -334,6 +328,7 @@ virResctrlGetInfo(virResctrlInfoPtr resctrl)
     int type = 0;
     struct dirent *ent = NULL;
     unsigned int level = 0;
+    virBitmapPtr tmp_map = NULL;
     virResctrlInfoPerLevelPtr i_level = NULL;
     virResctrlInfoPerTypePtr i_type = NULL;
 
@@ -378,7 +373,7 @@ virResctrlGetInfo(virResctrlInfoPtr resctrl)
             goto cleanup;
         }
 
-        rv = virFileReadValueString(&i_type->cbm_mask,
+        rv = virFileReadValueString(&tmp_str,
                                     SYSFS_RESCTRL_PATH
                                     "/info/%s/cbm_mask",
                                     ent->d_name);
@@ -393,7 +388,19 @@ virResctrlGetInfo(virResctrlInfoPtr resctrl)
         if (rv < 0)
             goto cleanup;
 
-        virStringTrimOptionalNewline(i_type->cbm_mask);
+        virStringTrimOptionalNewline(tmp_str);
+
+        tmp_map = virBitmapNewString(tmp_str);
+        VIR_FREE(tmp_str);
+        if (!tmp_map) {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("Cannot parse cbm_mask from resctrl cache info"));
+            goto cleanup;
+        }
+
+        i_type->bits = virBitmapCountBits(tmp_map);
+        virBitmapFree(tmp_map);
+        tmp_map = NULL;
 
         rv = virFileReadValueUint(&i_type->min_cbm_bits,
                                   SYSFS_RESCTRL_PATH "/info/%s/min_cbm_bits",
@@ -431,24 +438,12 @@ virResctrlGetInfo(virResctrlInfoPtr resctrl)
             goto cleanup;
         }
 
-        for (tmp_str = i_type->cbm_mask; *tmp_str != '\0'; tmp_str++) {
-            if (!c_isxdigit(*tmp_str)) {
-                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                               _("Cannot parse cbm_mask from resctrl cache info"));
-                goto cleanup;
-            }
-
-            i_type->bits += count_one_bits(virHexToBin(*tmp_str));
-        }
-
         VIR_STEAL_PTR(i_level->types[type], i_type);
     }
 
     ret = 0;
  cleanup:
     VIR_DIR_CLOSE(dirp);
-    if (i_type)
-        VIR_FREE(i_type->cbm_mask);
     VIR_FREE(i_type);
     return ret;
 }