Introduce M_IFGROUP type of memory allocation

[Vitaliy Makkoveev]

M_TEMP seems unreasonable for interface groups data allocations.

Don't forget to recompile systat(1) and vmstat(8) with new sys/malloc.h.

Index: sys/net/if.c
===================================================================
RCS file: /cvs/src/sys/net/if.c,v
retrieving revision 1.700
diff -u -p -r1.700 if.c
--- sys/net/if.c        12 Jun 2023 21:19:54 -0000      1.700
+++ sys/net/if.c        27 Jun 2023 10:15:12 -0000
@@ -2784,7 +2784,7 @@ if_creategroup(const char *groupname)
 {
        struct ifg_group        *ifg;
 
-       if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL)
+       if ((ifg = malloc(sizeof(*ifg), M_IFGROUP, M_NOWAIT)) == NULL)
                return (NULL);
 
        strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
@@ -2819,11 +2819,11 @@ if_addgroup(struct ifnet *ifp, const cha
                if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
                        return (EEXIST);
 
-       if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL)
+       if ((ifgl = malloc(sizeof(*ifgl), M_IFGROUP, M_NOWAIT)) == NULL)
                return (ENOMEM);
 
-       if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
-               free(ifgl, M_TEMP, sizeof(*ifgl));
+       if ((ifgm = malloc(sizeof(*ifgm), M_IFGROUP, M_NOWAIT)) == NULL) {
+               free(ifgl, M_IFGROUP, sizeof(*ifgl));
                return (ENOMEM);
        }
 
@@ -2834,8 +2834,8 @@ if_addgroup(struct ifnet *ifp, const cha
        if (ifg == NULL) {
                ifg = if_creategroup(groupname);
                if (ifg == NULL) {
-                       free(ifgl, M_TEMP, sizeof(*ifgl));
-                       free(ifgm, M_TEMP, sizeof(*ifgm));
+                       free(ifgl, M_IFGROUP, sizeof(*ifgl));
+                       free(ifgm, M_IFGROUP, sizeof(*ifgm));
                        return (ENOMEM);
                }
        } else
@@ -2878,7 +2878,7 @@ if_delgroup(struct ifnet *ifp, const cha
 
        if (ifgm != NULL) {
                TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
-               free(ifgm, M_TEMP, sizeof(*ifgm));
+               free(ifgm, M_IFGROUP, sizeof(*ifgm));
        }
 
 #if NPF > 0
@@ -2891,10 +2891,10 @@ if_delgroup(struct ifnet *ifp, const cha
 #if NPF > 0
                pfi_detach_ifgroup(ifgl->ifgl_group);
 #endif
-               free(ifgl->ifgl_group, M_TEMP, sizeof(*ifgl->ifgl_group));
+               free(ifgl->ifgl_group, M_IFGROUP, sizeof(*ifgl->ifgl_group));
        }
 
-       free(ifgl, M_TEMP, sizeof(*ifgl));
+       free(ifgl, M_IFGROUP, sizeof(*ifgl));
 
        return (0);
 }
Index: sys/sys/malloc.h
===================================================================
RCS file: /cvs/src/sys/sys/malloc.h,v
retrieving revision 1.122
diff -u -p -r1.122 malloc.h
--- sys/sys/malloc.h    3 Feb 2022 17:18:22 -0000       1.122
+++ sys/sys/malloc.h    27 Jun 2023 10:15:13 -0000
@@ -72,7 +72,7 @@
 /* 7 - free */
 /* 8 - free */
 #define        M_IFADDR        9       /* interface address */
-/* 10 - free */
+#define M_IFGROUP      10      /* interface group */
 #define        M_SYSCTL        11      /* sysctl buffers (persistent storage) 
*/
 #define        M_COUNTERS      12      /* per CPU counters */
 /* 13 - free */
@@ -190,7 +190,7 @@
        NULL, \
        NULL, \
        "ifaddr",       /* 9 M_IFADDR */ \
-       NULL, \
+       "ifgroup",      /* 10 M_IFGROUP */ \
        "sysctl",       /* 11 M_SYSCTL */ \
        "counters",     /* 12 M_COUNTERS */ \
        NULL, \