| mbuf.h (138541) | mbuf.h (141668) |
|---|---|
| 1/*- 2 * Copyright (c) 1982, 1986, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)mbuf.h 8.5 (Berkeley) 2/19/95 | 1/*- 2 * Copyright (c) 1982, 1986, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)mbuf.h 8.5 (Berkeley) 2/19/95 |
| 30 * $FreeBSD: head/sys/sys/mbuf.h 138541 2004-12-08 05:42:02Z sam $ | 30 * $FreeBSD: head/sys/sys/mbuf.h 141668 2005-02-10 22:23:02Z bmilekic $ |
| 31 */ 32 33#ifndef _SYS_MBUF_H_ 34#define _SYS_MBUF_H_ 35 36/* XXX: These includes suck. Sorry! */ 37#include <sys/queue.h> 38#ifdef _KERNEL --- 251 unchanged lines hidden (view full) --- 290 * mbuf external reference count management macros. 291 * 292 * MEXT_IS_REF(m): true if (m) is not the only mbuf referencing 293 * the external buffer ext_buf. 294 * 295 * MEXT_REM_REF(m): remove reference to m_ext object. 296 * 297 * MEXT_ADD_REF(m): add reference to m_ext object already | 31 */ 32 33#ifndef _SYS_MBUF_H_ 34#define _SYS_MBUF_H_ 35 36/* XXX: These includes suck. Sorry! */ 37#include <sys/queue.h> 38#ifdef _KERNEL --- 251 unchanged lines hidden (view full) --- 290 * mbuf external reference count management macros. 291 * 292 * MEXT_IS_REF(m): true if (m) is not the only mbuf referencing 293 * the external buffer ext_buf. 294 * 295 * MEXT_REM_REF(m): remove reference to m_ext object. 296 * 297 * MEXT_ADD_REF(m): add reference to m_ext object already |
| 298 * referred to by (m). | 298 * referred to by (m). XXX Note that it is VERY important that you 299 * always set the second mbuf's m_ext.ref_cnt to point to the first 300 * one's (i.e., n->m_ext.ref_cnt = m->m_ext.ref_cnt) AFTER you run 301 * MEXT_ADD_REF(m). This is because m might have a lazy initialized 302 * ref_cnt (NULL) before this is run and it will only be looked up 303 * from here. We should make MEXT_ADD_REF() always take two mbufs 304 * as arguments so that it can take care of this itself. |
| 299 */ | 305 */ |
| 300#define MEXT_IS_REF(m) (*((m)->m_ext.ref_cnt) > 1) | 306#define MEXT_IS_REF(m) (((m)->m_ext.ref_cnt != NULL) \ 307 && (*((m)->m_ext.ref_cnt) > 1)) |
| 301 302#define MEXT_REM_REF(m) do { \ | 308 309#define MEXT_REM_REF(m) do { \ |
| 310 KASSERT((m)->m_ext.ref_cnt != NULL, ("m_ext refcnt lazy NULL")); \ |
|
| 303 KASSERT(*((m)->m_ext.ref_cnt) > 0, ("m_ext refcnt < 0")); \ 304 atomic_subtract_int((m)->m_ext.ref_cnt, 1); \ 305} while(0) 306 | 311 KASSERT(*((m)->m_ext.ref_cnt) > 0, ("m_ext refcnt < 0")); \ 312 atomic_subtract_int((m)->m_ext.ref_cnt, 1); \ 313} while(0) 314 |
| 307#define MEXT_ADD_REF(m) atomic_add_int((m)->m_ext.ref_cnt, 1) | 315#define MEXT_ADD_REF(m) do { \ 316 if ((m)->m_ext.ref_cnt == NULL) { \ 317 KASSERT((m)->m_ext.ext_type == EXT_CLUSTER || \ 318 (m)->m_ext.ext_type == EXT_PACKET, \ 319 ("Unexpected mbuf type has lazy refcnt")); \ 320 (m)->m_ext.ref_cnt = (u_int *)uma_find_refcnt( \ 321 zone_clust, (m)->m_ext.ext_buf); \ 322 *((m)->m_ext.ref_cnt) = 2; \ 323 } else \ 324 atomic_add_int((m)->m_ext.ref_cnt, 1); \ 325} while (0) |
| 308 309#ifdef WITNESS 310#define MBUF_CHECKSLEEP(how) do { \ 311 if (how == M_WAITOK) \ 312 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ 313 "Sleeping in \"%s\"", __func__); \ 314} while(0) 315#else --- 430 unchanged lines hidden --- | 326 327#ifdef WITNESS 328#define MBUF_CHECKSLEEP(how) do { \ 329 if (how == M_WAITOK) \ 330 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ 331 "Sleeping in \"%s\"", __func__); \ 332} while(0) 333#else --- 430 unchanged lines hidden --- |