/* Reallocates 'b' so that it has exactly 'new_headroom' and 'new_tailroom'
* bytes of headroom and tailroom, respectively. */
static void
ofpbuf_resize__(struct ofpbuf *b, size_t new_headroom, size_t new_tailroom)
{
void *new_base, *new_data;
size_t new_allocated;
new_allocated = new_headroom + b->size + new_tailroom;
switch (b->source) {
case OFPBUF_MALLOC:
if (new_headroom == ofpbuf_headroom(b)) {
new_base = xrealloc(b->base, new_allocated);
} else {
new_base = xmalloc(new_allocated);
ofpbuf_copy__(b, new_base, new_headroom, new_tailroom);
free(b->base);
}
break;
case OFPBUF_STACK:
NOT_REACHED();
case OFPBUF_STUB:
b->source = OFPBUF_MALLOC;
new_base = xmalloc(new_allocated);
ofpbuf_copy__(b, new_base, new_headroom, new_tailroom);
break;
default:
NOT_REACHED();
}
b->allocated = new_allocated;
b->base = new_base;
new_data = (char *) new_base + new_headroom;
if (b->data != new_data) {
uintptr_t data_delta = (char *) new_data - (char *) b->data;
b->data = new_data;
if (b->l2) {
b->l2 = (char *) b->l2 + data_delta;
}
if (b->l2_5) {
b->l2_5 = (char *) b->l2_5 + data_delta;
}
if (b->l3) {
b->l3 = (char *) b->l3 + data_delta;
}
if (b->l4) {
b->l4 = (char *) b->l4 + data_delta;
}
if (b->l7) {
b->l7 = (char *) b->l7 + data_delta;
}
}
}
/* Reallocates 'b' so that it has exactly 'new_headroom' and 'new_tailroom'
* bytes of headroom and tailroom, respectively. */
static void
ofpbuf_resize__(struct ofpbuf *b, size_t new_headroom, size_t new_tailroom)
{
void *new_base, *new_data;
size_t new_allocated;
new_allocated = new_headroom + b->size + new_tailroom;
switch (b->source) {
case OFPBUF_MALLOC:
if (new_headroom == ofpbuf_headroom(b)) {
new_base = xrealloc(b->base, new_allocated);
} else {
new_base = xmalloc(new_allocated);
ofpbuf_copy__(b, new_base, new_headroom, new_tailroom);
free(b->base);
}
break;
case OFPBUF_STACK:
OVS_NOT_REACHED();
case OFPBUF_STUB:
b->source = OFPBUF_MALLOC;
new_base = xmalloc(new_allocated);
ofpbuf_copy__(b, new_base, new_headroom, new_tailroom);
break;
default:
OVS_NOT_REACHED();
}
b->allocated = new_allocated;
b->base = new_base;
new_data = (char *) new_base + new_headroom;
if (b->data != new_data) {
if (b->header) {
uintptr_t data_delta = (char *) b->header - (char *) b->data;
b->header = (char *) new_data + data_delta;
}
if (b->msg) {
uintptr_t data_delta = (char *) b->msg - (char *) b->data;
b->msg = (char *) new_data + data_delta;
}
b->data = new_data;
}
}
/* Reallocates 'b' so that it has exactly 'new_headroom' and 'new_tailroom'
* bytes of headroom and tailroom, respectively. */
static void
ofpbuf_resize__(struct ofpbuf *b, size_t new_headroom, size_t new_tailroom)
{
void *new_base, *new_data;
size_t new_allocated;
new_allocated = new_headroom + ofpbuf_size(b) + new_tailroom;
switch (b->source) {
case OFPBUF_DPDK:
OVS_NOT_REACHED();
case OFPBUF_MALLOC:
if (new_headroom == ofpbuf_headroom(b)) {
new_base = xrealloc(ofpbuf_base(b), new_allocated);
} else {
new_base = xmalloc(new_allocated);
ofpbuf_copy__(b, new_base, new_headroom, new_tailroom);
free(ofpbuf_base(b));
}
break;
case OFPBUF_STACK:
OVS_NOT_REACHED();
case OFPBUF_STUB:
b->source = OFPBUF_MALLOC;
new_base = xmalloc(new_allocated);
ofpbuf_copy__(b, new_base, new_headroom, new_tailroom);
break;
default:
OVS_NOT_REACHED();
}
b->allocated = new_allocated;
ofpbuf_set_base(b, new_base);
new_data = (char *) new_base + new_headroom;
if (ofpbuf_data(b) != new_data) {
if (b->frame) {
uintptr_t data_delta = (char *) new_data - (char *) ofpbuf_data(b);
b->frame = (char *) b->frame + data_delta;
}
ofpbuf_set_data(b, new_data);
}
}
