X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/5d5c5d0d5b79ade9a973d55186ffda2638ba2b6e..d1ecb069dfe24481e4a83f44cb5217a2b06746d7:/bsd/kern/uipc_mbuf2.c diff --git a/bsd/kern/uipc_mbuf2.c b/bsd/kern/uipc_mbuf2.c index 8f31d88f5..5276ce659 100644 --- a/bsd/kern/uipc_mbuf2.c +++ b/bsd/kern/uipc_mbuf2.c @@ -1,31 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2007 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * This file contains Original Code and/or Modifications of Original Code - * as defined in and that are subject to the Apple Public Source License - * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. The rights granted to you under the - * License may not be used to create, or enable the creation or - * redistribution of, unlawful or unlicensed copies of an Apple operating - * system, or to circumvent, violate, or enable the circumvention or - * violation of, any terms of an Apple operating system software license - * agreement. - * - * Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. - * - * The Original Code and all software distributed under the License are - * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER - * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, - * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. - * Please see the License for the specific language governing rights and + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and * limitations under the License. - * - * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* $NetBSD: uipc_mbuf.c,v 1.40 1999/04/01 00:23:25 thorpej Exp $ */ @@ -92,6 +90,12 @@ * * @(#)uipc_mbuf.c 8.4 (Berkeley) 2/14/95 */ +/* + * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce + * support for mandatory and extensible security protections. This notice + * is included in support of clause 2.2 (b) of the Apple Public License, + * Version 2.0. + */ /*#define PULLDOWN_DEBUG*/ @@ -107,6 +111,10 @@ #include #endif +#if CONFIG_MACF_NET +#include +#endif + /* * ensure that [off, off + len) is contiguous on the mbuf chain "m". * packet chain before "off" is kept untouched. @@ -118,10 +126,7 @@ * XXX M_TRAILINGSPACE/M_LEADINGSPACE on shared cluster (sharedcluster) */ struct mbuf * -m_pulldown(m, off, len, offp) - struct mbuf *m; - int off, len; - int *offp; +m_pulldown(struct mbuf *m, int off, int len, int *offp) { struct mbuf *n, *o; int hlen, tlen, olen; @@ -360,87 +365,6 @@ ok: return n; } -/* - * pkthdr.aux chain manipulation. - * we don't allow clusters at this moment. - */ -struct mbuf * -m_aux_add(m, af, type) - struct mbuf *m; - int af, type; -{ - struct mbuf *n; - struct mauxtag *t; - - if ((m->m_flags & M_PKTHDR) == 0) - return NULL; - - n = m_aux_find(m, af, type); - if (n) - return n; - - MGET(n, M_DONTWAIT, m->m_type); - if (n == NULL) - return NULL; - - t = mtod(n, struct mauxtag *); - t->af = af; - t->type = type; - n->m_data += sizeof(struct mauxtag); - n->m_len = 0; - n->m_next = m->m_pkthdr.aux; - m->m_pkthdr.aux = n; - return n; -} - -struct mbuf * -m_aux_find(m, af, type) - struct mbuf *m; - int af, type; -{ - struct mbuf *n; - struct mauxtag *t; - - if ((m->m_flags & M_PKTHDR) == 0) - return NULL; - - for (n = m->m_pkthdr.aux; n; n = n->m_next) { - t = (struct mauxtag *)n->m_dat; - if (t->af == af && t->type == type) - return n; - } - return NULL; -} - -void -m_aux_delete(m, victim) - struct mbuf *m; - struct mbuf *victim; -{ - struct mbuf *n, *prev, *next; - struct mauxtag *t; - - if ((m->m_flags & M_PKTHDR) == 0) - return; - - prev = NULL; - n = m->m_pkthdr.aux; - while (n) { - t = (struct mauxtag *)n->m_dat; - next = n->m_next; - if (n == victim) { - if (prev) - prev->m_next = n->m_next; - else - m->m_pkthdr.aux = n->m_next; - n->m_next = NULL; - m_free(n); - } else - prev = n; - n = next; - } -} - /* Get a packet tag structure along with specified data following. */ struct m_tag * m_tag_alloc(u_int32_t id, u_int16_t type, int len, int wait) @@ -449,17 +373,16 @@ m_tag_alloc(u_int32_t id, u_int16_t type, int len, int wait) if (len < 0) return NULL; -#ifndef __APPLE__ - t = malloc(len + sizeof(struct m_tag), M_PACKET_TAGS, wait); +#if CONFIG_MBUF_TAGS_MALLOC + t = _MALLOC(len + sizeof (struct m_tag), M_TEMP, wait); #else - /*MALLOC(t, struct m_tag *, len + sizeof(struct m_tag), M_TEMP, M_WAITOK);*/ if (len + sizeof(struct m_tag) <= MLEN) { struct mbuf *m = m_get(wait, MT_TAG); if (m == NULL) return NULL; - t = (struct m_tag *) m->m_dat; + t = mtod(m, struct m_tag *); } else if (len + sizeof(struct m_tag) <= MCLBYTES) { - MCLALLOC((caddr_t)t, wait); + t = (struct m_tag *) m_mclalloc(wait); } else t = NULL; #endif @@ -476,13 +399,18 @@ m_tag_alloc(u_int32_t id, u_int16_t type, int len, int wait) void m_tag_free(struct m_tag *t) { -#ifndef __APPLE__ - free(t, M_PACKET_TAGS); +#if CONFIG_MACF_NET + if (t != NULL && + t->m_tag_id == KERNEL_MODULE_TAG_ID && + t->m_tag_type == KERNEL_TAG_TYPE_MACLABEL) + mac_mbuf_tag_destroy(t); +#endif +#if CONFIG_MBUF_TAGS_MALLOC + _FREE(t, M_TEMP); #else - /* FREE(t, M_TEMP); */ if (t == NULL) return; - if (t->m_tag_len <= MLEN) { + if (t->m_tag_len + sizeof(struct m_tag) <= MLEN) { struct mbuf * m = m_dtom(t); m_free(m); } else { @@ -563,6 +491,22 @@ m_tag_copy(struct m_tag *t, int how) p = m_tag_alloc(t->m_tag_id, t->m_tag_type, t->m_tag_len, how); if (p == NULL) return (NULL); +#if CONFIG_MACF_NET + /* + * XXXMAC: we should probably pass off the initialization, and + * copying here? can we hid that KERNEL_TAG_TYPE_MACLABEL is + * special from the mbuf code? + */ + if (t != NULL && + t->m_tag_id == KERNEL_MODULE_TAG_ID && + t->m_tag_type == KERNEL_TAG_TYPE_MACLABEL) { + if (mac_mbuf_tag_init(p, how) != 0) { + m_tag_free(p); + return (NULL); + } + mac_mbuf_tag_copy(t, p); + } else +#endif bcopy(t + 1, p + 1, t->m_tag_len); /* Copy the data */ return p; } @@ -602,6 +546,9 @@ void m_tag_init(struct mbuf *m) { SLIST_INIT(&m->m_pkthdr.tags); +#if PF_PKTHDR + bzero(&m->m_pkthdr.pf_mtag, sizeof (m->m_pkthdr.pf_mtag)); +#endif } /* Get first tag in chain. */ @@ -617,3 +564,25 @@ m_tag_next(__unused struct mbuf *m, struct m_tag *t) { return SLIST_NEXT(t, m_tag_link); } + +void +m_prio_init(struct mbuf *m) +{ +#if !PKT_PRIORITY +#pragma unused(m) +#else /* PKT_PRIORITY */ + if (m->m_flags & M_PKTHDR) + m->m_pkthdr.prio = MBUF_PRIORITY_NORMAL; +#endif /* PKT_PRIORITY */ +} + +void +m_prio_background(struct mbuf *m) +{ +#if !PKT_PRIORITY +#pragma unused(m) +#else /* PKT_PRIORITY */ + if (m->m_flags & M_PKTHDR) + m->m_pkthdr.prio = MBUF_PRIORITY_BACKGROUND; +#endif /* PKT_PRIORITY */ +}