Push m_apply() and m_getptr() up into the colleciton of standard mbuf

routines, and purge them from opencrypto.

Reviewed by:	sam
Obtained from:	NetBSD
Sponsored by:	spc.org

sys/conf/files

@@ -1569,7 +1569,6 @@ nfsserver/nfs_syscalls.c	optional nfsserver
 # crypto support
 opencrypto/cast.c		optional crypto
 opencrypto/criov.c		optional crypto
-opencrypto/crmbuf.c		optional crypto
 opencrypto/crypto.c		optional crypto
 opencrypto/cryptodev.c		optional cryptodev
 opencrypto/cryptosoft.c		optional crypto

sys/kern/uipc_mbuf.c

@@ -755,6 +755,73 @@ out:	if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
 		m->m_pkthdr.len = totlen;
 }
 
+/*
+ * Apply function f to the data in an mbuf chain starting "off" bytes from
+ * the beginning, continuing for "len" bytes.
+ */
+int
+m_apply(struct mbuf *m, int off, int len,
+    int (*f)(void *, caddr_t, unsigned int), void *arg)
+{
+	unsigned int count;
+	int rval;
+
+	KASSERT(off >= 0, ("m_apply, negative off %d", off));
+	KASSERT(len >= 0, ("m_apply, negative len %d", len));
+
+	while (off > 0) {
+		KASSERT(m != NULL, ("m_apply, offset > size of mbuf chain"));
+		if (off < m->m_len)
+			break;
+		off -= m->m_len;
+		m = m->m_next;
+	}
+	while (len > 0) {
+		KASSERT(m != NULL, ("m_apply, offset > size of mbuf chain"));
+		count = min(m->m_len - off, len);
+
+		rval = (*f)(arg, mtod(m, caddr_t) + off, count);
+		if (rval)
+			return (rval);
+
+		len -= count;
+		off = 0;
+		m = m->m_next;
+	}
+
+	return (0);
+}
+
+/*
+ * Return a pointer to mbuf/offset of location in mbuf chain.
+ */
+struct mbuf *
+m_getptr(struct mbuf *m, int loc, int *off)
+{
+
+	while (loc >= 0) {
+		/* Normal end of search */
+		if (m->m_len > loc) {
+			*off = loc;
+			return (m);
+		} else {
+			loc -= m->m_len;
+
+			if (m->m_next == NULL) {
+				if (loc == 0) {
+					/* Point at the end of valid data */
+					*off = m->m_len;
+					return (m);
+				} else
+					return (NULL);
+			} else
+				m = m->m_next;
+		}
+	}
+
+	return (NULL);
+}
+
 void
 m_print(const struct mbuf *m)
 {

sys/modules/crypto/Makefile

@@ -9,7 +9,7 @@
 
 KMOD	= crypto
 SRCS	= crypto.c
-SRCS	+= criov.c crmbuf.c cryptosoft.c xform.c
+SRCS	+= criov.c cryptosoft.c xform.c
 SRCS	+= cast.c deflate.c rmd160.c rijndael.c skipjack.c
 SRCS	+= bf_enc.c bf_skey.c
 SRCS	+= des_ecb.c des_enc.c des_setkey.c

sys/netipsec/ipsec_mbuf.c

@@ -42,8 +42,6 @@
 
 #include <netipsec/ipsec.h>
 
-extern	struct mbuf *m_getptr(struct mbuf *, int, int *);
-
 /*
  * Create a writable copy of the mbuf chain.  While doing this
  * we compact the chain with a goal of producing a chain with

sys/opencrypto/cryptodev.h

@@ -379,9 +379,6 @@ extern	int crypto_devallowsoft;	/* only use hardware crypto */
  * XXX these don't really belong here; but for now they're
  *     kept apart from the rest of the system.
  */
-struct mbuf;
-struct	mbuf	*m_getptr(struct mbuf *, int, int *);
-
 struct uio;
 extern	void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
 extern	void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);

sys/opencrypto/cryptosoft.c

@@ -87,13 +87,6 @@ static	int swcr_process(void *, struct cryptop *, int);
 static	int swcr_newsession(void *, u_int32_t *, struct cryptoini *);
 static	int swcr_freesession(void *, u_int64_t);
 
-/*
- * NB: These came over from openbsd and are kept private
- *     to the crypto code for now.
- */
-extern	int m_apply(struct mbuf *m, int off, int len,
-		    int (*f)(caddr_t, caddr_t, unsigned int), caddr_t fstate);
-
 /*
  * Apply a symmetric encryption/decryption algorithm.
  */
@@ -460,7 +453,7 @@ swcr_authcompute(struct cryptop *crp, struct cryptodesc *crd,
 		break;
 	case CRYPTO_BUF_MBUF:
 		err = m_apply((struct mbuf *) buf, crd->crd_skip, crd->crd_len,
-		    (int (*)(caddr_t, caddr_t, unsigned int)) axf->Update,
+		    (int (*)(void *, caddr_t, unsigned int)) axf->Update,
 		    (caddr_t) &ctx);
 		if (err)
 			return err;

sys/sys/mbuf.h

@@ -435,6 +435,8 @@ extern	int nsfbufs;			/* Number of sendfile(2) bufs */
 
 void		 _mext_free(struct mbuf *);
 void		 m_adj(struct mbuf *, int);
+int		 m_apply(struct mbuf *, int, int,
+		 int (*)(void *, caddr_t, unsigned int), void *);
 void		 m_cat(struct mbuf *, struct mbuf *);
 void		 m_chtype(struct mbuf *, short);
 void		 m_clget(struct mbuf *, int);
@@ -460,6 +462,7 @@ struct	mbuf	*m_getcl(int, short, int);
 struct	mbuf	*m_gethdr(int, short);
 struct	mbuf	*m_gethdr_clrd(int, short);
 struct	mbuf	*m_getm(struct mbuf *, int, int, short);
+struct	mbuf	*m_getptr(struct mbuf *, int, int *);
 u_int		 m_length(struct mbuf *, struct mbuf **);
 void		 m_move_pkthdr(struct mbuf *, struct mbuf *);
 struct	mbuf	*m_prepend(struct mbuf *, int, int);