+ * These conversion macros rely on the corresponding MBUF_SC and
+ * MBUF_TC values in order to establish the following mapping:
+ *
+ * MBUF_SC_BK_SYS ] ==> MBUF_TC_BK
+ * MBUF_SC_BK ]
+ *
+ * MBUF_SC_BE ] ==> MBUF_TC_BE
+ * MBUF_SC_RD ]
+ * MBUF_SC_OAM ]
+ *
+ * MBUF_SC_AV ] ==> MBUF_TC_VI
+ * MBUF_SC_RV ]
+ * MBUF_SC_VI ]
+ *
+ * MBUF_SC_VO ] ==> MBUF_TC_VO
+ * MBUF_SC_CTL ]
+ *
+ * The values assigned to each service class allows for a fast mapping to
+ * the corresponding MBUF_TC traffic class values, as well as to retrieve the
+ * assigned index; therefore care must be taken when comparing against these
+ * values. Use the corresponding class and index macros to retrieve the
+ * corresponding portion, and never assume that a higher class corresponds
+ * to a higher index.
+ */
+#define MBUF_SCVAL(x) ((x) & 0xffff)
+#define MBUF_SCIDX(x) ((((x) >> 16) & 0xff) >> 3)
+#define MBUF_SC2TC(_sc) (MBUF_SCVAL(_sc) >> 7)
+#define MBUF_TC2SCVAL(_tc) ((_tc) << 7)
+#define IS_MBUF_SC_BACKGROUND(_sc) (((_sc) == MBUF_SC_BK_SYS) || \
+ ((_sc) == MBUF_SC_BK))
+
+#define SCIDX_BK_SYS MBUF_SCIDX(MBUF_SC_BK_SYS)
+#define SCIDX_BK MBUF_SCIDX(MBUF_SC_BK)
+#define SCIDX_BE MBUF_SCIDX(MBUF_SC_BE)
+#define SCIDX_RD MBUF_SCIDX(MBUF_SC_RD)
+#define SCIDX_OAM MBUF_SCIDX(MBUF_SC_OAM)
+#define SCIDX_AV MBUF_SCIDX(MBUF_SC_AV)
+#define SCIDX_RV MBUF_SCIDX(MBUF_SC_RV)
+#define SCIDX_VI MBUF_SCIDX(MBUF_SC_VI)
+#define SCIDX_VO MBUF_SCIDX(MBUF_SC_VO)
+#define SCIDX_CTL MBUF_SCIDX(MBUF_SC_CTL)
+
+#define SCVAL_BK_SYS MBUF_SCVAL(MBUF_SC_BK_SYS)
+#define SCVAL_BK MBUF_SCVAL(MBUF_SC_BK)
+#define SCVAL_BE MBUF_SCVAL(MBUF_SC_BE)
+#define SCVAL_RD MBUF_SCVAL(MBUF_SC_RD)
+#define SCVAL_OAM MBUF_SCVAL(MBUF_SC_OAM)
+#define SCVAL_AV MBUF_SCVAL(MBUF_SC_AV)
+#define SCVAL_RV MBUF_SCVAL(MBUF_SC_RV)
+#define SCVAL_VI MBUF_SCVAL(MBUF_SC_VI)
+#define SCVAL_VO MBUF_SCVAL(MBUF_SC_VO)
+#define SCVAL_CTL MBUF_SCVAL(MBUF_SC_CTL)
+
+#define MBUF_VALID_SC(c) \
+ (c == MBUF_SC_BK_SYS || c == MBUF_SC_BK || c == MBUF_SC_BE || \
+ c == MBUF_SC_RD || c == MBUF_SC_OAM || c == MBUF_SC_AV || \
+ c == MBUF_SC_RV || c == MBUF_SC_VI || c == MBUF_SC_VO || \
+ c == MBUF_SC_CTL)
+
+#define MBUF_VALID_SCIDX(c) \
+ (c == SCIDX_BK_SYS || c == SCIDX_BK || c == SCIDX_BE || \
+ c == SCIDX_RD || c == SCIDX_OAM || c == SCIDX_AV || \
+ c == SCIDX_RV || c == SCIDX_VI || c == SCIDX_VO || \
+ c == SCIDX_CTL)
+
+#define MBUF_VALID_SCVAL(c) \
+ (c == SCVAL_BK_SYS || c == SCVAL_BK || c == SCVAL_BE || \
+ c == SCVAL_RD || c == SCVAL_OAM || c == SCVAL_AV || \
+ c == SCVAL_RV || c == SCVAL_VI || c == SCVAL_VO || \
+ c == SCVAL_CTL)
+
+extern union mbigcluster *mbutl; /* start VA of mbuf pool */
+extern union mbigcluster *embutl; /* end VA of mbuf pool */
+extern unsigned int nmbclusters; /* number of mapped clusters */
+extern int njcl; /* # of jumbo clusters */
+extern int njclbytes; /* size of a jumbo cluster */
+extern int max_hdr; /* largest link+protocol header */
+extern int max_datalen; /* MHLEN - max_hdr */
+
+/* Use max_linkhdr instead of _max_linkhdr */
+extern int _max_linkhdr; /* largest link-level header */
+
+/* Use max_protohdr instead of _max_protohdr */
+extern int _max_protohdr; /* largest protocol header */
+
+__private_extern__ unsigned int mbuf_default_ncl(int, u_int64_t);
+__private_extern__ void mbinit(void);
+__private_extern__ struct mbuf *m_clattach(struct mbuf *, int, caddr_t,
+ void (*)(caddr_t, u_int, caddr_t), u_int, caddr_t, int);
+__private_extern__ caddr_t m_bigalloc(int);
+__private_extern__ void m_bigfree(caddr_t, u_int, caddr_t);
+__private_extern__ struct mbuf *m_mbigget(struct mbuf *, int);
+__private_extern__ caddr_t m_16kalloc(int);
+__private_extern__ void m_16kfree(caddr_t, u_int, caddr_t);
+__private_extern__ struct mbuf *m_m16kget(struct mbuf *, int);
+__private_extern__ int m_reinit(struct mbuf *, int);
+__private_extern__ struct mbuf *m_free(struct mbuf *);
+__private_extern__ struct mbuf *m_getclr(int, int);
+__private_extern__ struct mbuf *m_getptr(struct mbuf *, int, int *);
+__private_extern__ unsigned int m_length(struct mbuf *);
+__private_extern__ unsigned int m_length2(struct mbuf *, struct mbuf **);
+__private_extern__ unsigned int m_fixhdr(struct mbuf *);
+__private_extern__ struct mbuf *m_defrag(struct mbuf *, int);
+__private_extern__ struct mbuf *m_defrag_offset(struct mbuf *, u_int32_t, int);
+__private_extern__ struct mbuf *m_prepend(struct mbuf *, int, int);
+__private_extern__ struct mbuf *m_copyup(struct mbuf *, int, int);
+__private_extern__ struct mbuf *m_retry(int, int);
+__private_extern__ struct mbuf *m_retryhdr(int, int);
+__private_extern__ int m_freem_list(struct mbuf *);
+__private_extern__ int m_append(struct mbuf *, int, caddr_t);
+__private_extern__ struct mbuf *m_last(struct mbuf *);
+__private_extern__ struct mbuf *m_devget(char *, int, int, struct ifnet *,
+ void (*)(const void *, void *, size_t));
+__private_extern__ struct mbuf *m_pulldown(struct mbuf *, int, int, int *);
+
+__private_extern__ struct mbuf *m_getcl(int, int, int);
+__private_extern__ caddr_t m_mclalloc(int);
+__private_extern__ int m_mclhasreference(struct mbuf *);
+__private_extern__ void m_copy_pkthdr(struct mbuf *, struct mbuf *);
+__private_extern__ void m_copy_pftag(struct mbuf *, struct mbuf *);
+__private_extern__ void m_copy_classifier(struct mbuf *, struct mbuf *);
+
+__private_extern__ struct mbuf *m_dtom(void *);
+__private_extern__ int m_mtocl(void *);
+__private_extern__ union mcluster *m_cltom(int);
+
+__private_extern__ int m_trailingspace(struct mbuf *);
+__private_extern__ int m_leadingspace(struct mbuf *);
+
+__private_extern__ struct mbuf *m_normalize(struct mbuf *m);
+__private_extern__ void m_mchtype(struct mbuf *m, int t);
+__private_extern__ void m_mcheck(struct mbuf *);
+
+__private_extern__ void m_copyback(struct mbuf *, int, int, const void *);
+__private_extern__ struct mbuf *m_copyback_cow(struct mbuf *, int, int,
+ const void *, int);
+__private_extern__ int m_makewritable(struct mbuf **, int, int, int);
+__private_extern__ struct mbuf *m_dup(struct mbuf *m, int how);
+__private_extern__ struct mbuf *m_copym_with_hdrs(struct mbuf *, int, int, int,
+ struct mbuf **, int *, uint32_t);
+__private_extern__ struct mbuf *m_getpackethdrs(int, int);
+__private_extern__ struct mbuf *m_getpacket_how(int);
+__private_extern__ struct mbuf *m_getpackets_internal(unsigned int *, int,
+ int, int, size_t);
+__private_extern__ struct mbuf *m_allocpacket_internal(unsigned int *, size_t,
+ unsigned int *, int, int, size_t);
+
+/*
+ * Packets may have annotations attached by affixing a list of "packet
+ * tags" to the pkthdr structure. Packet tags are dynamically allocated
+ * semi-opaque data structures that have a fixed header (struct m_tag)
+ * that specifies the size of the memory block and an <id,type> pair that
+ * identifies it. The id identifies the module and the type identifies the
+ * type of data for that module. The id of zero is reserved for the kernel.
+ *
+ * Note that the packet tag returned by m_tag_allocate has the default
+ * memory alignment implemented by malloc. To reference private data one
+ * can use a construct like:
+ *
+ * struct m_tag *mtag = m_tag_allocate(...);
+ * struct foo *p = (struct foo *)(mtag+1);
+ *
+ * if the alignment of struct m_tag is sufficient for referencing members
+ * of struct foo. Otherwise it is necessary to embed struct m_tag within
+ * the private data structure to insure proper alignment; e.g.
+ *
+ * struct foo {
+ * struct m_tag tag;
+ * ...
+ * };
+ * struct foo *p = (struct foo *) m_tag_allocate(...);
+ * struct m_tag *mtag = &p->tag;
+ */
+
+#define KERNEL_MODULE_TAG_ID 0
projects / apple / xnu.git / blobdiff