43 merror(queue_t *wq, mblk_t *mp, int error)  in merror()  argument
45 	if ((mp = mexchange(wq, mp, 1, M_ERROR, -1)) == NULL)  in merror()
48 	*mp->b_rptr = (uchar_t)error;  in merror()
49 	qreply(wq, mp);  in merror()
53 mioc2ack(mblk_t *mp, mblk_t *dp, size_t count, int rval)  in mioc2ack()  argument
55 	struct iocblk *iocp = (struct iocblk *)mp->b_rptr;  in mioc2ack()
56 	mblk_t *odp = mp->b_cont;  	/* allows freemsg() to be a tail call */  in mioc2ack()
58 	DB_TYPE(mp) = M_IOCACK;  in mioc2ack()
63 	mp->b_cont = dp;  in mioc2ack()
70 miocack(queue_t *wq, mblk_t *mp, int count, int rval)  in miocack()  argument
72 	struct iocblk *iocp = (struct iocblk *)mp->b_rptr;  in miocack()
74 	DB_TYPE(mp) = M_IOCACK;  in miocack()
78 	qreply(wq, mp);  in miocack()
82 miocnak(queue_t *wq, mblk_t *mp, int count, int error)  in miocnak()  argument
84 	struct iocblk *iocp = (struct iocblk *)mp->b_rptr;  in miocnak()
86 	DB_TYPE(mp) = M_IOCNAK;  in miocnak()
89 	qreply(wq, mp);  in miocnak()
93 mexchange(queue_t *wq, mblk_t *mp, size_t size, uchar_t type, int32_t primtype)  in mexchange()  argument
95 	if (mp == NULL || MBLKSIZE(mp) < size || DB_REF(mp) > 1) {  in mexchange()
96 		freemsg(mp);  in mexchange()
97 		if ((mp = allocb(size, BPRI_LO)) == NULL) {  in mexchange()
99 				if ((mp = allocb(1, BPRI_HI)) != NULL)  in mexchange()
100 					merror(wq, mp, ENOSR);  in mexchange()
106 	DB_TYPE(mp) = type;  in mexchange()
107 	mp->b_rptr = DB_BASE(mp);  in mexchange()
108 	mp->b_wptr = mp->b_rptr + size;  in mexchange()
110 		*(int32_t *)mp->b_rptr = primtype;  in mexchange()
112 	return (mp);  in mexchange()
116 msgsize(mblk_t *mp)  in msgsize()  argument
120 	for (; mp != NULL; mp = mp->b_cont)  in msgsize()
121 		n += MBLKL(mp);  in msgsize()
127 mcopymsg(mblk_t *mp, void *bufp)  in mcopymsg()  argument
133 	for (bp = mp; bp != NULL; bp = bp->b_cont) {  in mcopymsg()
139 	freemsg(mp);  in mcopymsg()
143 mcopyin(mblk_t *mp, void *private, size_t size, void *useraddr)  in mcopyin()  argument
145 	struct copyreq *cp = (struct copyreq *)mp->b_rptr;  in mcopyin()
150 		ASSERT(DB_TYPE(mp) == M_IOCTL);  in mcopyin()
151 		ASSERT(mp->b_cont != NULL);  in mcopyin()
152 		ASSERT(((struct iocblk *)mp->b_rptr)->ioc_count == TRANSPARENT);  in mcopyin()
153 		cp->cq_addr = (caddr_t)*(uintptr_t *)mp->b_cont->b_rptr;  in mcopyin()
160 	DB_TYPE(mp) = M_COPYIN;  in mcopyin()
161 	mp->b_wptr = mp->b_rptr + sizeof (struct copyreq);  in mcopyin()
163 	if (mp->b_cont != NULL) {  in mcopyin()
164 		freemsg(mp->b_cont);  in mcopyin()
165 		mp->b_cont = NULL;  in mcopyin()
170 mcopyout(mblk_t *mp, void *private, size_t size, void *useraddr, mblk_t *dp)  in mcopyout()  argument
172 	struct copyreq *cp = (struct copyreq *)mp->b_rptr;  in mcopyout()
177 		ASSERT(DB_TYPE(mp) == M_IOCTL);  in mcopyout()
178 		ASSERT(mp->b_cont != NULL);  in mcopyout()
179 		ASSERT(((struct iocblk *)mp->b_rptr)->ioc_count == TRANSPARENT);  in mcopyout()
180 		cp->cq_addr = (caddr_t)*(uintptr_t *)mp->b_cont->b_rptr;  in mcopyout()
187 	DB_TYPE(mp) = M_COPYOUT;  in mcopyout()
188 	mp->b_wptr = mp->b_rptr + sizeof (struct copyreq);  in mcopyout()
191 		if (mp->b_cont != NULL)  in mcopyout()
192 			freemsg(mp->b_cont);  in mcopyout()
193 		mp->b_cont = dp;  in mcopyout()
194 		mp->b_cont->b_wptr = mp->b_cont->b_rptr + size;  in mcopyout()
276 		mblk_t  *mp;  in mcopyinuio()  local
280 		if ((mp = allocb_cred(offset + blocksize + tail_len,  in mcopyinuio()
285 		mp->b_rptr += offset;  in mcopyinuio()
286 		mp->b_wptr = mp->b_rptr + blocksize;  in mcopyinuio()
288 		*tail = mp;  in mcopyinuio()
289 		tail = &mp->b_cont;  in mcopyinuio()
292 		if ((*errorp = uiomove(mp->b_rptr, (size_t)blocksize,  in mcopyinuio()