Annotation of sys/crypto/criov.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: criov.c,v 1.16 2006/12/29 13:04:37 pedro Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1999 Theo de Raadt
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: *
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 19: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 26: */
! 27:
! 28: #include <sys/param.h>
! 29: #include <sys/systm.h>
! 30: #include <sys/proc.h>
! 31: #include <sys/errno.h>
! 32: #include <sys/malloc.h>
! 33: #include <sys/kernel.h>
! 34: #include <sys/mbuf.h>
! 35:
! 36: #include <uvm/uvm_extern.h>
! 37:
! 38: #include <crypto/cryptodev.h>
! 39:
! 40: void
! 41: cuio_copydata(struct uio *uio, int off, int len, caddr_t cp)
! 42: {
! 43: struct iovec *iov = uio->uio_iov;
! 44: int iol = uio->uio_iovcnt;
! 45: unsigned count;
! 46:
! 47: if (off < 0)
! 48: panic("cuio_copydata: off %d < 0", off);
! 49: if (len < 0)
! 50: panic("cuio_copydata: len %d < 0", len);
! 51: while (off > 0) {
! 52: if (iol == 0)
! 53: panic("iov_copydata: empty in skip");
! 54: if (off < iov->iov_len)
! 55: break;
! 56: off -= iov->iov_len;
! 57: iol--;
! 58: iov++;
! 59: }
! 60: while (len > 0) {
! 61: if (iol == 0)
! 62: panic("cuio_copydata: empty");
! 63: count = min(iov->iov_len - off, len);
! 64: bcopy(((caddr_t)iov->iov_base) + off, cp, count);
! 65: len -= count;
! 66: cp += count;
! 67: off = 0;
! 68: iol--;
! 69: iov++;
! 70: }
! 71: }
! 72:
! 73: void
! 74: cuio_copyback(struct uio *uio, int off, int len, const void *_cp)
! 75: {
! 76: struct iovec *iov = uio->uio_iov;
! 77: int iol = uio->uio_iovcnt;
! 78: unsigned count;
! 79: caddr_t cp = (caddr_t)_cp;
! 80:
! 81: if (off < 0)
! 82: panic("cuio_copyback: off %d < 0", off);
! 83: if (len < 0)
! 84: panic("cuio_copyback: len %d < 0", len);
! 85: while (off > 0) {
! 86: if (iol == 0)
! 87: panic("cuio_copyback: empty in skip");
! 88: if (off < iov->iov_len)
! 89: break;
! 90: off -= iov->iov_len;
! 91: iol--;
! 92: iov++;
! 93: }
! 94: while (len > 0) {
! 95: if (iol == 0)
! 96: panic("uio_copyback: empty");
! 97: count = min(iov->iov_len - off, len);
! 98: bcopy(cp, ((caddr_t)iov->iov_base) + off, count);
! 99: len -= count;
! 100: cp += count;
! 101: off = 0;
! 102: iol--;
! 103: iov++;
! 104: }
! 105: }
! 106:
! 107: int
! 108: cuio_getptr(struct uio *uio, int loc, int *off)
! 109: {
! 110: int ind, len;
! 111:
! 112: ind = 0;
! 113: while (loc >= 0 && ind < uio->uio_iovcnt) {
! 114: len = uio->uio_iov[ind].iov_len;
! 115: if (len > loc) {
! 116: *off = loc;
! 117: return (ind);
! 118: }
! 119: loc -= len;
! 120: ind++;
! 121: }
! 122:
! 123: if (ind > 0 && loc == 0) {
! 124: ind--;
! 125: *off = uio->uio_iov[ind].iov_len;
! 126: return (ind);
! 127: }
! 128:
! 129: return (-1);
! 130: }
! 131:
! 132: int
! 133: cuio_apply(struct uio *uio, int off, int len,
! 134: int (*f)(caddr_t, caddr_t, unsigned int), caddr_t fstate)
! 135: {
! 136: int rval, ind, uiolen;
! 137: unsigned int count;
! 138:
! 139: if (len < 0)
! 140: panic("cuio_apply: len %d < 0", len);
! 141: if (off < 0)
! 142: panic("cuio_apply: off %d < 0", off);
! 143:
! 144: ind = 0;
! 145: while (off > 0) {
! 146: if (ind >= uio->uio_iovcnt)
! 147: panic("cuio_apply: ind %d >= uio_iovcnt %d for off",
! 148: ind, uio->uio_iovcnt);
! 149: uiolen = uio->uio_iov[ind].iov_len;
! 150: if (off < uiolen)
! 151: break;
! 152: off -= uiolen;
! 153: ind++;
! 154: }
! 155: while (len > 0) {
! 156: if (ind >= uio->uio_iovcnt)
! 157: panic("cuio_apply: ind %d >= uio_iovcnt %d for len",
! 158: ind, uio->uio_iovcnt);
! 159: count = min(uio->uio_iov[ind].iov_len - off, len);
! 160:
! 161: rval = f(fstate, (char *)uio->uio_iov[ind].iov_base + off,
! 162: count);
! 163: if (rval)
! 164: return (rval);
! 165:
! 166: len -= count;
! 167: off = 0;
! 168: ind++;
! 169: }
! 170:
! 171: return (0);
! 172: }
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