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ofpbuf: Add OFPBUF_DPDK type.

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This will be used by DPDK for zero copy IO.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
This commit is contained in:
Pravin
2014-03-20 11:00:14 -07:00
committed by Pravin B Shelar
parent 55c955bd8a
commit 20ebd77152
2 changed files with 9 additions and 1 deletions
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7
lib/ofpbuf.c
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@@ -265,6 +265,9 @@ ofpbuf_resize__(struct ofpbuf *b, size_t new_headroom, size_t new_tailroom)
new_allocated = new_headroom + b->size + new_tailroom;
switch (b->source) {
case OFPBUF_DPDK:
OVS_NOT_REACHED();
case OFPBUF_MALLOC:
if (new_headroom == ofpbuf_headroom(b)) {
new_base = xrealloc(b->base, new_allocated);
@@ -343,6 +346,8 @@ ofpbuf_prealloc_headroom(struct ofpbuf *b, size_t size)
void
ofpbuf_trim(struct ofpbuf *b)
{
ovs_assert(b->source != OFPBUF_DPDK);
if (b->source == OFPBUF_MALLOC
&& (ofpbuf_headroom(b) || ofpbuf_tailroom(b))) {
ofpbuf_resize__(b, 0, 0);
@@ -562,6 +567,8 @@ void *
ofpbuf_steal_data(struct ofpbuf *b)
{
void *p;
ovs_assert(b->source != OFPBUF_DPDK);
if (b->source == OFPBUF_MALLOC && b->data == b->base) {
p = b->data;
} else {

3
lib/ofpbuf.h
View File

@@ -29,7 +29,8 @@ extern "C" {
enum ofpbuf_source {
OFPBUF_MALLOC, /* Obtained via malloc(). */
OFPBUF_STACK, /* Un-movable stack space or static buffer. */
OFPBUF_STUB /* Starts on stack, may expand into heap. */
OFPBUF_STUB, /* Starts on stack, may expand into heap. */
OFPBUF_DPDK, /* buffer data is from DPDK allocated memory. */
};
/* Buffer for holding arbitrary data. An ofpbuf is automatically reallocated