/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
#include <sys/param.h>
#include <sys/systm.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <vm/pmap.h>
+#include <sys/uio_internal.h>
+#include <kern/kalloc.h>
#include <kdebug.h>
#define DBG_UIO_COPYOUT 16
#define DBG_UIO_COPYIN 17
+#if DEBUG
+#include <kern/simple_lock.h>
+
+static int uio_t_count = 0;
+#endif /* DEBUG */
+
int
uiomove(cp, n, uio)
register caddr_t cp;
register int n;
- register struct uio *uio;
+ register uio_t uio;
{
return uiomove64((addr64_t)((unsigned int)cp), n, uio);
}
+ // LP64todo - fix this! 'n' should be int64_t?
int
-uiomove64(addr64_t cp, int n, struct uio *uio)
+uiomove64(addr64_t cp, int n, register struct uio *uio)
{
- register struct iovec *iov;
- u_int cnt;
+#if LP64KERN
+ register uint64_t acnt;
+#else
+ register u_int acnt;
+#endif
int error = 0;
#if DIAGNOSTIC
if (uio->uio_rw != UIO_READ && uio->uio_rw != UIO_WRITE)
panic("uiomove: mode");
- if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != current_proc())
- panic("uiomove proc");
#endif
- while (n > 0 && uio->uio_resid) {
- iov = uio->uio_iov;
- cnt = iov->iov_len;
- if (cnt == 0) {
- uio->uio_iov++;
+#if LP64_DEBUG
+ if (IS_VALID_UIO_SEGFLG(uio->uio_segflg) == 0) {
+ panic("%s :%d - invalid uio_segflg\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ while (n > 0 && uio_resid(uio)) {
+ acnt = uio_iov_len(uio);
+ if (acnt == 0) {
+ uio_next_iov(uio);
uio->uio_iovcnt--;
continue;
}
- if (cnt > n)
- cnt = n;
+ if (n > 0 && acnt > (uint64_t)n)
+ acnt = n;
+
switch (uio->uio_segflg) {
+ case UIO_USERSPACE64:
+ case UIO_USERISPACE64:
+ // LP64 - 3rd argument in debug code is 64 bit, expected to be 32 bit
+ if (uio->uio_rw == UIO_READ)
+ {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
+ (int)cp, (int)uio->uio_iovs.iov64p->iov_base, acnt, 0,0);
+
+ error = copyout( CAST_DOWN(caddr_t, cp), uio->uio_iovs.iov64p->iov_base, acnt );
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
+ (int)cp, (int)uio->uio_iovs.iov64p->iov_base, acnt, 0,0);
+ }
+ else
+ {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
+ (int)uio->uio_iovs.iov64p->iov_base, (int)cp, acnt, 0,0);
+
+ error = copyin(uio->uio_iovs.iov64p->iov_base, CAST_DOWN(caddr_t, cp), acnt);
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
+ (int)uio->uio_iovs.iov64p->iov_base, (int)cp, acnt, 0,0);
+ }
+ if (error)
+ return (error);
+ break;
+
+ case UIO_USERSPACE32:
+ case UIO_USERISPACE32:
case UIO_USERSPACE:
case UIO_USERISPACE:
if (uio->uio_rw == UIO_READ)
{
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
- (int)cp, (int)iov->iov_base, cnt, 0,0);
+ (int)cp, (int)uio->uio_iovs.iov32p->iov_base, acnt, 0,0);
- error = copyout( CAST_DOWN(caddr_t, cp), iov->iov_base, cnt );
+ error = copyout( CAST_DOWN(caddr_t, cp), CAST_USER_ADDR_T(uio->uio_iovs.iov32p->iov_base), acnt );
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
- (int)cp, (int)iov->iov_base, cnt, 0,0);
+ (int)cp, (int)uio->uio_iovs.iov32p->iov_base, acnt, 0,0);
}
else
{
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
- (int)iov->iov_base, (int)cp, cnt, 0,0);
+ (int)uio->uio_iovs.iov32p->iov_base, (int)cp, acnt, 0,0);
- error = copyin(iov->iov_base, CAST_DOWN(caddr_t, cp), cnt);
+ error = copyin(CAST_USER_ADDR_T(uio->uio_iovs.iov32p->iov_base), CAST_DOWN(caddr_t, cp), acnt);
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
- (int)iov->iov_base, (int)cp, cnt, 0,0);
+ (int)uio->uio_iovs.iov32p->iov_base, (int)cp, acnt, 0,0);
}
if (error)
return (error);
break;
+ case UIO_SYSSPACE32:
case UIO_SYSSPACE:
if (uio->uio_rw == UIO_READ)
- error = copywithin(CAST_DOWN(caddr_t, cp), iov->iov_base,
- cnt);
+ error = copywithin(CAST_DOWN(caddr_t, cp), (caddr_t)uio->uio_iovs.iov32p->iov_base,
+ acnt);
else
- error = copywithin(iov->iov_base, CAST_DOWN(caddr_t, cp),
- cnt);
+ error = copywithin((caddr_t)uio->uio_iovs.iov32p->iov_base, CAST_DOWN(caddr_t, cp),
+ acnt);
break;
+ case UIO_PHYS_USERSPACE64:
+ if (uio->uio_rw == UIO_READ)
+ {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
+ (int)cp, (int)uio->uio_iovs.iov64p->iov_base, acnt, 1,0);
+
+ error = copypv((addr64_t)cp, uio->uio_iovs.iov64p->iov_base, acnt, cppvPsrc | cppvNoRefSrc);
+ if (error) /* Copy physical to virtual */
+ error = EFAULT;
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
+ (int)cp, (int)uio->uio_iovs.iov64p->iov_base, acnt, 1,0);
+ }
+ else
+ {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
+ (int)uio->uio_iovs.iov64p->iov_base, (int)cp, acnt, 1,0);
+
+ error = copypv(uio->uio_iovs.iov64p->iov_base, (addr64_t)cp, acnt, cppvPsnk | cppvNoRefSrc | cppvNoModSnk);
+ if (error) /* Copy virtual to physical */
+ error = EFAULT;
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
+ (int)uio->uio_iovs.iov64p->iov_base, (int)cp, acnt, 1,0);
+ }
+ if (error)
+ return (error);
+ break;
+
+ case UIO_PHYS_USERSPACE32:
case UIO_PHYS_USERSPACE:
if (uio->uio_rw == UIO_READ)
{
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
- (int)cp, (int)iov->iov_base, cnt, 1,0);
+ (int)cp, (int)uio->uio_iovs.iov32p->iov_base, acnt, 1,0);
- if (error = copypv((addr64_t)cp, (addr64_t)((unsigned int)iov->iov_base), cnt, cppvPsrc | cppvNoRefSrc)) /* Copy physical to virtual */
+ error = copypv((addr64_t)cp, (addr64_t)uio->uio_iovs.iov32p->iov_base, acnt, cppvPsrc | cppvNoRefSrc);
+ if (error) /* Copy physical to virtual */
error = EFAULT;
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
- (int)cp, (int)iov->iov_base, cnt, 1,0);
+ (int)cp, (int)uio->uio_iovs.iov32p->iov_base, acnt, 1,0);
}
else
{
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
- (int)iov->iov_base, (int)cp, cnt, 1,0);
+ (int)uio->uio_iovs.iov32p->iov_base, (int)cp, acnt, 1,0);
- if (error = copypv((addr64_t)((unsigned int)iov->iov_base), (addr64_t)cp, cnt, cppvPsnk | cppvNoRefSrc | cppvNoModSnk)) /* Copy virtual to physical */
+ error = copypv((addr64_t)uio->uio_iovs.iov32p->iov_base, (addr64_t)cp, acnt, cppvPsnk | cppvNoRefSrc | cppvNoModSnk);
+ if (error) /* Copy virtual to physical */
error = EFAULT;
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
- (int)iov->iov_base, (int)cp, cnt, 1,0);
+ (int)uio->uio_iovs.iov32p->iov_base, (int)cp, acnt, 1,0);
}
if (error)
return (error);
break;
+ case UIO_PHYS_SYSSPACE32:
case UIO_PHYS_SYSSPACE:
if (uio->uio_rw == UIO_READ)
{
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
- (int)cp, (int)iov->iov_base, cnt, 2,0);
+ (int)cp, (int)uio->uio_iovs.iov32p->iov_base, acnt, 2,0);
- if (error = copypv((addr64_t)cp, (addr64_t)((unsigned int)iov->iov_base), cnt, cppvKmap | cppvPsrc | cppvNoRefSrc)) /* Copy physical to virtual */
+ error = copypv((addr64_t)cp, uio->uio_iovs.iov32p->iov_base, acnt, cppvKmap | cppvPsrc | cppvNoRefSrc);
+ if (error) /* Copy physical to virtual */
error = EFAULT;
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
- (int)cp, (int)iov->iov_base, cnt, 2,0);
+ (int)cp, (int)uio->uio_iovs.iov32p->iov_base, acnt, 2,0);
}
else
{
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
- (int)iov->iov_base, (int)cp, cnt, 2,0);
+ (int)uio->uio_iovs.iov32p->iov_base, (int)cp, acnt, 2,0);
- if (error = copypv((addr64_t)((unsigned int)iov->iov_base), (addr64_t)cp, cnt, cppvKmap | cppvPsnk | cppvNoRefSrc | cppvNoModSnk)) /* Copy virtual to physical */
+ error = copypv(uio->uio_iovs.iov32p->iov_base, (addr64_t)cp, acnt, cppvKmap | cppvPsnk | cppvNoRefSrc | cppvNoModSnk);
+ if (error) /* Copy virtual to physical */
error = EFAULT;
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
- (int)iov->iov_base, (int)cp, cnt, 2,0);
+ (int)uio->uio_iovs.iov32p->iov_base, (int)cp, acnt, 2,0);
}
if (error)
return (error);
break;
+
+ default:
+ break;
}
- iov->iov_base += cnt;
- iov->iov_len -= cnt;
- uio->uio_resid -= cnt;
- uio->uio_offset += cnt;
- cp += cnt;
- n -= cnt;
+ uio_iov_base_add(uio, acnt);
+#if LP64KERN
+ uio_iov_len_add(uio, -((int64_t)acnt));
+ uio_setresid(uio, (uio_resid(uio) - ((int64_t)acnt)));
+#else
+ uio_iov_len_add(uio, -((int)acnt));
+ uio_setresid(uio, (uio_resid(uio) - ((int)acnt)));
+#endif
+ uio->uio_offset += acnt;
+ cp += acnt;
+ n -= acnt;
}
return (error);
}
register int c;
register struct uio *uio;
{
- register struct iovec *iov;
-
- if (uio->uio_resid <= 0)
+ if (uio_resid(uio) <= 0)
panic("ureadc: non-positive resid");
again:
if (uio->uio_iovcnt == 0)
panic("ureadc: non-positive iovcnt");
- iov = uio->uio_iov;
- if (iov->iov_len <= 0) {
+ if (uio_iov_len(uio) <= 0) {
uio->uio_iovcnt--;
- uio->uio_iov++;
+ uio_next_iov(uio);
goto again;
}
switch (uio->uio_segflg) {
+ case UIO_USERSPACE32:
case UIO_USERSPACE:
- if (subyte(iov->iov_base, c) < 0)
+ if (subyte(CAST_USER_ADDR_T(uio->uio_iovs.iov32p->iov_base), c) < 0)
+ return (EFAULT);
+ break;
+
+ case UIO_USERSPACE64:
+ if (subyte((user_addr_t)uio->uio_iovs.iov64p->iov_base, c) < 0)
return (EFAULT);
break;
+ case UIO_SYSSPACE32:
case UIO_SYSSPACE:
- *iov->iov_base = c;
+ *((caddr_t)uio->uio_iovs.iov32p->iov_base) = c;
break;
+ case UIO_USERISPACE32:
case UIO_USERISPACE:
- if (suibyte(iov->iov_base, c) < 0)
+ if (suibyte(CAST_USER_ADDR_T(uio->uio_iovs.iov32p->iov_base), c) < 0)
return (EFAULT);
break;
+
+ default:
+ break;
}
- iov->iov_base++;
- iov->iov_len--;
- uio->uio_resid--;
+ uio_iov_base_add(uio, 1);
+ uio_iov_len_add(uio, -1);
+ uio_setresid(uio, (uio_resid(uio) - 1));
uio->uio_offset++;
return (0);
}
/*
* Get next character written in by user from uio.
*/
+int
uwritec(uio)
- struct uio *uio;
+ uio_t uio;
{
- register struct iovec *iov;
- register int c;
+ register int c = 0;
- if (uio->uio_resid <= 0)
+ if (uio_resid(uio) <= 0)
return (-1);
again:
if (uio->uio_iovcnt <= 0)
panic("uwritec: non-positive iovcnt");
- iov = uio->uio_iov;
- if (iov->iov_len == 0) {
- uio->uio_iov++;
+
+ if (uio_iov_len(uio) == 0) {
+ uio_next_iov(uio);
if (--uio->uio_iovcnt == 0)
return (-1);
goto again;
}
switch (uio->uio_segflg) {
+ case UIO_USERSPACE32:
case UIO_USERSPACE:
- c = fubyte(iov->iov_base);
+ c = fubyte(CAST_USER_ADDR_T(uio->uio_iovs.iov32p->iov_base));
+ break;
+
+ case UIO_USERSPACE64:
+ c = fubyte((user_addr_t)uio->uio_iovs.iov64p->iov_base);
break;
+ case UIO_SYSSPACE32:
case UIO_SYSSPACE:
- c = *iov->iov_base & 0377;
+ c = *((caddr_t)uio->uio_iovs.iov32p->iov_base) & 0377;
break;
+ case UIO_USERISPACE32:
case UIO_USERISPACE:
- c = fuibyte(iov->iov_base);
+ c = fuibyte(CAST_USER_ADDR_T(uio->uio_iovs.iov32p->iov_base));
break;
default:
}
if (c < 0)
return (-1);
- iov->iov_base++;
- iov->iov_len--;
- uio->uio_resid--;
+ uio_iov_base_add(uio, 1);
+ uio_iov_len_add(uio, -1);
+ uio_setresid(uio, (uio_resid(uio) - 1));
uio->uio_offset++;
return (c);
}
continue;
hashsize >>= 1;
MALLOC(hashtbl, struct generic *,
- (u_long)hashsize * sizeof(*hashtbl), type, M_WAITOK);
- bzero(hashtbl, (u_long)hashsize * sizeof(*hashtbl));
- for (i = 0; i < hashsize; i++)
- LIST_INIT(&hashtbl[i]);
- *hashmask = hashsize - 1;
+ (u_long)hashsize * sizeof(*hashtbl), type, M_WAITOK|M_ZERO);
+ if (hashtbl != NULL) {
+ for (i = 0; i < hashsize; i++)
+ LIST_INIT(&hashtbl[i]);
+ *hashmask = hashsize - 1;
+ }
return (hashtbl);
}
+
+/*
+ * uio_resid - return the residual IO value for the given uio_t
+ */
+user_ssize_t uio_resid( uio_t a_uio )
+{
+#if DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+/* if (IS_VALID_UIO_SEGFLG(a_uio->uio_segflg) == 0) { */
+/* panic("%s :%d - invalid uio_segflg\n", __FILE__, __LINE__); */
+/* } */
+#endif /* DEBUG */
+
+ /* return 0 if there are no active iovecs */
+ if (a_uio == NULL) {
+ return( 0 );
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+#if 1 // LP64todo - remove this temp workaround once we go live with uio KPI
+ return( (user_ssize_t)a_uio->uio_resid );
+#else
+ return( a_uio->uio_resid_64 );
+#endif
+ }
+ return( (user_ssize_t)a_uio->uio_resid );
+}
+
+/*
+ * uio_setresid - set the residual IO value for the given uio_t
+ */
+void uio_setresid( uio_t a_uio, user_ssize_t a_value )
+{
+#if DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+/* if (IS_VALID_UIO_SEGFLG(a_uio->uio_segflg) == 0) { */
+/* panic("%s :%d - invalid uio_segflg\n", __FILE__, __LINE__); */
+/* } */
+#endif /* DEBUG */
+
+ if (a_uio == NULL) {
+ return;
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+#if 1 // LP64todo - remove this temp workaround once we go live with uio KPI
+ a_uio->uio_resid = (int)a_value;
+#else
+ a_uio->uio_resid_64 = a_value;
+#endif
+ }
+ else {
+ a_uio->uio_resid = (int)a_value;
+ }
+ return;
+}
+
+#if 0 // obsolete
+/*
+ * uio_proc_t - return the proc_t for the given uio_t
+ * WARNING - This call is going away. Find another way to get the proc_t!!
+ */
+__private_extern__ proc_t uio_proc_t( uio_t a_uio )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ /* return 0 if there are no active iovecs */
+ if (a_uio == NULL) {
+ return( NULL );
+ }
+ return( a_uio->uio_procp );
+}
+
+/*
+ * uio_setproc_t - set the residual IO value for the given uio_t
+ * WARNING - This call is going away.
+ */
+__private_extern__ void uio_setproc_t( uio_t a_uio, proc_t a_proc_t )
+{
+ if (a_uio == NULL) {
+#if LP64_DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return;
+ }
+
+ a_uio->uio_procp = a_proc_t;
+ return;
+}
+#endif // obsolete
+
+/*
+ * uio_curriovbase - return the base address of the current iovec associated
+ * with the given uio_t. May return 0.
+ */
+user_addr_t uio_curriovbase( uio_t a_uio )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL || a_uio->uio_iovcnt < 1) {
+ return(0);
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ return(a_uio->uio_iovs.uiovp->iov_base);
+ }
+ return((user_addr_t)((uintptr_t)a_uio->uio_iovs.kiovp->iov_base));
+
+}
+
+/*
+ * uio_curriovlen - return the length value of the current iovec associated
+ * with the given uio_t.
+ */
+user_size_t uio_curriovlen( uio_t a_uio )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL || a_uio->uio_iovcnt < 1) {
+ return(0);
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ return(a_uio->uio_iovs.uiovp->iov_len);
+ }
+ return((user_size_t)a_uio->uio_iovs.kiovp->iov_len);
+}
+
+/*
+ * uio_setcurriovlen - set the length value of the current iovec associated
+ * with the given uio_t.
+ */
+__private_extern__ void uio_setcurriovlen( uio_t a_uio, user_size_t a_value )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL) {
+ return;
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ a_uio->uio_iovs.uiovp->iov_len = a_value;
+ }
+ else {
+#if LP64_DEBUG
+ if (a_value > 0xFFFFFFFFull) {
+ panic("%s :%d - invalid a_value\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+ a_uio->uio_iovs.kiovp->iov_len = (size_t)a_value;
+ }
+ return;
+}
+
+/*
+ * uio_iovcnt - return count of active iovecs for the given uio_t
+ */
+int uio_iovcnt( uio_t a_uio )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL) {
+ return(0);
+ }
+
+ return( a_uio->uio_iovcnt );
+}
+
+/*
+ * uio_offset - return the current offset value for the given uio_t
+ */
+off_t uio_offset( uio_t a_uio )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL) {
+ return(0);
+ }
+ return( a_uio->uio_offset );
+}
+
+/*
+ * uio_setoffset - set the current offset value for the given uio_t
+ */
+void uio_setoffset( uio_t a_uio, off_t a_offset )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL) {
+ return;
+ }
+ a_uio->uio_offset = a_offset;
+ return;
+}
+
+/*
+ * uio_rw - return the read / write flag for the given uio_t
+ */
+int uio_rw( uio_t a_uio )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL) {
+ return(-1);
+ }
+ return( a_uio->uio_rw );
+}
+
+/*
+ * uio_setrw - set the read / write flag for the given uio_t
+ */
+void uio_setrw( uio_t a_uio, int a_value )
+{
+ if (a_uio == NULL) {
+#if LP64_DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return;
+ }
+
+#if LP64_DEBUG
+ if (!(a_value == UIO_READ || a_value == UIO_WRITE)) {
+ panic("%s :%d - invalid a_value\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_value == UIO_READ || a_value == UIO_WRITE) {
+ a_uio->uio_rw = a_value;
+ }
+ return;
+}
+
+/*
+ * uio_isuserspace - return non zero value if the address space
+ * flag is for a user address space (could be 32 or 64 bit).
+ */
+int uio_isuserspace( uio_t a_uio )
+{
+ if (a_uio == NULL) {
+#if LP64_DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return(0);
+ }
+
+ if (UIO_SEG_IS_USER_SPACE(a_uio->uio_segflg)) {
+ return( 1 );
+ }
+ return( 0 );
+}
+
+
+/*
+ * uio_create - create an uio_t.
+ * Space is allocated to hold up to a_iovcount number of iovecs. The uio_t
+ * is not fully initialized until all iovecs are added using uio_addiov calls.
+ * a_iovcount is the maximum number of iovecs you may add.
+ */
+uio_t uio_create( int a_iovcount, /* number of iovecs */
+ off_t a_offset, /* current offset */
+ int a_spacetype, /* type of address space */
+ int a_iodirection ) /* read or write flag */
+{
+ void * my_buf_p;
+ int my_size;
+ uio_t my_uio;
+
+ my_size = sizeof(struct uio) + (sizeof(struct user_iovec) * a_iovcount);
+ my_buf_p = kalloc(my_size);
+ my_uio = uio_createwithbuffer( a_iovcount,
+ a_offset,
+ a_spacetype,
+ a_iodirection,
+ my_buf_p,
+ my_size );
+ if (my_uio != 0) {
+ /* leave a note that we allocated this uio_t */
+ my_uio->uio_flags |= UIO_FLAGS_WE_ALLOCED;
+#if DEBUG
+ hw_atomic_add(&uio_t_count, 1);
+#endif
+ }
+
+ return( my_uio );
+}
+
+
+/*
+ * uio_createwithbuffer - create an uio_t.
+ * Create a uio_t using the given buffer. The uio_t
+ * is not fully initialized until all iovecs are added using uio_addiov calls.
+ * a_iovcount is the maximum number of iovecs you may add.
+ * This call may fail if the given buffer is not large enough.
+ */
+__private_extern__ uio_t
+ uio_createwithbuffer( int a_iovcount, /* number of iovecs */
+ off_t a_offset, /* current offset */
+ int a_spacetype, /* type of address space */
+ int a_iodirection, /* read or write flag */
+ void *a_buf_p, /* pointer to a uio_t buffer */
+ int a_buffer_size ) /* size of uio_t buffer */
+{
+ uio_t my_uio = (uio_t) a_buf_p;
+ int my_size;
+
+ my_size = sizeof(struct uio) + (sizeof(struct user_iovec) * a_iovcount);
+ if (a_buffer_size < my_size) {
+#if DEBUG
+ panic("%s :%d - a_buffer_size is too small\n", __FILE__, __LINE__);
+#endif /* DEBUG */
+ return( NULL );
+ }
+ my_size = a_buffer_size;
+
+#if DEBUG
+ if (my_uio == 0) {
+ panic("%s :%d - could not allocate uio_t\n", __FILE__, __LINE__);
+ }
+ if (!IS_VALID_UIO_SEGFLG(a_spacetype)) {
+ panic("%s :%d - invalid address space type\n", __FILE__, __LINE__);
+ }
+ if (!(a_iodirection == UIO_READ || a_iodirection == UIO_WRITE)) {
+ panic("%s :%d - invalid IO direction flag\n", __FILE__, __LINE__);
+ }
+ if (a_iovcount > UIO_MAXIOV) {
+ panic("%s :%d - invalid a_iovcount\n", __FILE__, __LINE__);
+ }
+#endif /* DEBUG */
+
+ bzero(my_uio, my_size);
+ my_uio->uio_size = my_size;
+
+ /* we use uio_segflg to indicate if the uio_t is the new format or */
+ /* old (pre LP64 support) legacy format */
+ switch (a_spacetype) {
+ case UIO_USERSPACE:
+ my_uio->uio_segflg = UIO_USERSPACE32;
+ case UIO_SYSSPACE:
+ my_uio->uio_segflg = UIO_SYSSPACE32;
+ case UIO_PHYS_USERSPACE:
+ my_uio->uio_segflg = UIO_PHYS_USERSPACE32;
+ case UIO_PHYS_SYSSPACE:
+ my_uio->uio_segflg = UIO_PHYS_SYSSPACE32;
+ default:
+ my_uio->uio_segflg = a_spacetype;
+ break;
+ }
+
+ if (a_iovcount > 0) {
+ my_uio->uio_iovs.uiovp = (struct user_iovec *)
+ (((uint8_t *)my_uio) + sizeof(struct uio));
+ }
+ else {
+ my_uio->uio_iovs.uiovp = NULL;
+ }
+
+ my_uio->uio_max_iovs = a_iovcount;
+ my_uio->uio_offset = a_offset;
+ my_uio->uio_rw = a_iodirection;
+ my_uio->uio_flags = UIO_FLAGS_INITED;
+
+ return( my_uio );
+}
+
+/*
+ * uio_spacetype - return the address space type for the given uio_t
+ */
+int uio_spacetype( uio_t a_uio )
+{
+ if (a_uio == NULL) {
+#if LP64_DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return(-1);
+ }
+
+ return( a_uio->uio_segflg );
+}
+
+/*
+ * uio_iovsaddr - get the address of the iovec array for the given uio_t.
+ * This returns the location of the iovecs within the uio.
+ * NOTE - for compatibility mode we just return the current value in uio_iovs
+ * which will increase as the IO is completed and is NOT embedded within the
+ * uio, it is a seperate array of one or more iovecs.
+ */
+struct user_iovec * uio_iovsaddr( uio_t a_uio )
+{
+ struct user_iovec * my_addr;
+
+ if (a_uio == NULL) {
+ return(NULL);
+ }
+
+ if (a_uio->uio_segflg == UIO_USERSPACE || a_uio->uio_segflg == UIO_SYSSPACE) {
+ /* we need this for compatibility mode. */
+ my_addr = (struct user_iovec *) a_uio->uio_iovs.iovp;
+ }
+ else {
+ my_addr = (struct user_iovec *) (((uint8_t *)a_uio) + sizeof(struct uio));
+ }
+ return(my_addr);
+}
+
+/*
+ * uio_reset - reset an uio_t.
+ * Reset the given uio_t to initial values. The uio_t is not fully initialized
+ * until all iovecs are added using uio_addiov calls.
+ * The a_iovcount value passed in the uio_create is the maximum number of
+ * iovecs you may add.
+ */
+void uio_reset( uio_t a_uio,
+ off_t a_offset, /* current offset */
+ int a_spacetype, /* type of address space */
+ int a_iodirection ) /* read or write flag */
+{
+ vm_size_t my_size;
+ int my_max_iovs;
+ u_int32_t my_old_flags;
+
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - could not allocate uio_t\n", __FILE__, __LINE__);
+ }
+ if (!IS_VALID_UIO_SEGFLG(a_spacetype)) {
+ panic("%s :%d - invalid address space type\n", __FILE__, __LINE__);
+ }
+ if (!(a_iodirection == UIO_READ || a_iodirection == UIO_WRITE)) {
+ panic("%s :%d - invalid IO direction flag\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL) {
+ return;
+ }
+
+ my_size = a_uio->uio_size;
+ my_old_flags = a_uio->uio_flags;
+ my_max_iovs = a_uio->uio_max_iovs;
+ bzero(a_uio, my_size);
+ a_uio->uio_size = my_size;
+ a_uio->uio_segflg = a_spacetype;
+ if (my_max_iovs > 0) {
+ a_uio->uio_iovs.uiovp = (struct user_iovec *)
+ (((uint8_t *)a_uio) + sizeof(struct uio));
+ }
+ else {
+ a_uio->uio_iovs.uiovp = NULL;
+ }
+ a_uio->uio_max_iovs = my_max_iovs;
+ a_uio->uio_offset = a_offset;
+ a_uio->uio_rw = a_iodirection;
+ a_uio->uio_flags = my_old_flags;
+
+ return;
+}
+
+/*
+ * uio_free - free a uio_t allocated via uio_init. this also frees all
+ * associated iovecs.
+ */
+void uio_free( uio_t a_uio )
+{
+#if DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - passing NULL uio_t\n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio != NULL && (a_uio->uio_flags & UIO_FLAGS_WE_ALLOCED) != 0) {
+#if DEBUG
+ if ((int)(hw_atomic_sub(&uio_t_count, 1)) < 0) {
+ panic("%s :%d - uio_t_count has gone negative\n", __FILE__, __LINE__);
+ }
+#endif
+ kfree(a_uio, a_uio->uio_size);
+ }
+
+
+}
+
+/*
+ * uio_addiov - add an iovec to the given uio_t. You may call this up to
+ * the a_iovcount number that was passed to uio_create. This call will
+ * increment the residual IO count as iovecs are added to the uio_t.
+ * returns 0 if add was successful else non zero.
+ */
+int uio_addiov( uio_t a_uio, user_addr_t a_baseaddr, user_size_t a_length )
+{
+ int i;
+
+ if (a_uio == NULL) {
+#if DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return(-1);
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ for ( i = 0; i < a_uio->uio_max_iovs; i++ ) {
+ if (a_uio->uio_iovs.uiovp[i].iov_len == 0 && a_uio->uio_iovs.uiovp[i].iov_base == 0) {
+ a_uio->uio_iovs.uiovp[i].iov_len = a_length;
+ a_uio->uio_iovs.uiovp[i].iov_base = a_baseaddr;
+ a_uio->uio_iovcnt++;
+#if 1 // LP64todo - remove this temp workaround once we go live with uio KPI
+ a_uio->uio_resid += a_length;
+#else
+ a_uio->uio_resid_64 += a_length;
+#endif
+ return( 0 );
+ }
+ }
+ }
+ else {
+ for ( i = 0; i < a_uio->uio_max_iovs; i++ ) {
+ if (a_uio->uio_iovs.kiovp[i].iov_len == 0 && a_uio->uio_iovs.kiovp[i].iov_base == 0) {
+ a_uio->uio_iovs.kiovp[i].iov_len = (u_int32_t)a_length;
+ a_uio->uio_iovs.kiovp[i].iov_base = (u_int32_t)((uintptr_t)a_baseaddr);
+ a_uio->uio_iovcnt++;
+ a_uio->uio_resid += a_length;
+ return( 0 );
+ }
+ }
+ }
+
+ return( -1 );
+}
+
+/*
+ * uio_getiov - get iovec data associated with the given uio_t. Use
+ * a_index to iterate over each iovec (0 to (uio_iovcnt(uio_t) - 1)).
+ * a_baseaddr_p and a_length_p may be NULL.
+ * returns -1 when a_index is >= uio_t.uio_iovcnt or invalid uio_t.
+ * returns 0 when data is returned.
+ */
+int uio_getiov( uio_t a_uio,
+ int a_index,
+ user_addr_t * a_baseaddr_p,
+ user_size_t * a_length_p )
+{
+ if (a_uio == NULL) {
+#if DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* DEBUG */
+ return(-1);
+ }
+ if ( a_index < 0 || a_index >= a_uio->uio_iovcnt) {
+ return(-1);
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ if (a_baseaddr_p != NULL) {
+ *a_baseaddr_p = a_uio->uio_iovs.uiovp[a_index].iov_base;
+ }
+ if (a_length_p != NULL) {
+ *a_length_p = a_uio->uio_iovs.uiovp[a_index].iov_len;
+ }
+ }
+ else {
+ if (a_baseaddr_p != NULL) {
+ *a_baseaddr_p = a_uio->uio_iovs.kiovp[a_index].iov_base;
+ }
+ if (a_length_p != NULL) {
+ *a_length_p = a_uio->uio_iovs.kiovp[a_index].iov_len;
+ }
+ }
+
+ return( 0 );
+}
+
+/*
+ * uio_calculateresid - runs through all iovecs associated with this
+ * uio_t and calculates (and sets) the residual IO count.
+ */
+__private_extern__ void uio_calculateresid( uio_t a_uio )
+{
+ int i;
+
+ if (a_uio == NULL) {
+#if LP64_DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return;
+ }
+
+ a_uio->uio_iovcnt = a_uio->uio_max_iovs;
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+#if 1 // LP64todo - remove this temp workaround once we go live with uio KPI
+ a_uio->uio_resid = 0;
+#else
+ a_uio->uio_resid_64 = 0;
+#endif
+ for ( i = 0; i < a_uio->uio_max_iovs; i++ ) {
+ if (a_uio->uio_iovs.uiovp[i].iov_len != 0 && a_uio->uio_iovs.uiovp[i].iov_base != 0) {
+#if 1 // LP64todo - remove this temp workaround once we go live with uio KPI
+ a_uio->uio_resid += a_uio->uio_iovs.uiovp[i].iov_len;
+#else
+ a_uio->uio_resid_64 += a_uio->uio_iovs.uiovp[i].iov_len;
+#endif
+ }
+ }
+
+ /* position to first non zero length iovec (4235922) */
+ while (a_uio->uio_iovcnt > 0 && a_uio->uio_iovs.uiovp->iov_len == 0) {
+ a_uio->uio_iovcnt--;
+ if (a_uio->uio_iovcnt > 0) {
+ a_uio->uio_iovs.uiovp++;
+ }
+ }
+ }
+ else {
+ a_uio->uio_resid = 0;
+ for ( i = 0; i < a_uio->uio_max_iovs; i++ ) {
+ if (a_uio->uio_iovs.kiovp[i].iov_len != 0 && a_uio->uio_iovs.kiovp[i].iov_base != 0) {
+ a_uio->uio_resid += a_uio->uio_iovs.kiovp[i].iov_len;
+ }
+ }
+
+ /* position to first non zero length iovec (4235922) */
+ while (a_uio->uio_iovcnt > 0 && a_uio->uio_iovs.kiovp->iov_len == 0) {
+ a_uio->uio_iovcnt--;
+ if (a_uio->uio_iovcnt > 0) {
+ a_uio->uio_iovs.kiovp++;
+ }
+ }
+ }
+
+ return;
+}
+
+/*
+ * uio_update - update the given uio_t for a_count of completed IO.
+ * This call decrements the current iovec length and residual IO value
+ * and increments the current iovec base address and offset value.
+ * If the current iovec length is 0 then advance to the next
+ * iovec (if any).
+ * If the a_count passed in is 0, than only do the advancement
+ * over any 0 length iovec's.
+ */
+void uio_update( uio_t a_uio, user_size_t a_count )
+{
+#if LP64_DEBUG
+ if (a_uio == NULL) {
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+ }
+ if (UIO_IS_32_BIT_SPACE(a_uio) && a_count > 0xFFFFFFFFull) {
+ panic("%s :%d - invalid count value \n", __FILE__, __LINE__);
+ }
+#endif /* LP64_DEBUG */
+
+ if (a_uio == NULL || a_uio->uio_iovcnt < 1) {
+ return;
+ }
+
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ /*
+ * if a_count == 0, then we are asking to skip over
+ * any empty iovs
+ */
+ if (a_count) {
+ if (a_count > a_uio->uio_iovs.uiovp->iov_len) {
+ a_uio->uio_iovs.uiovp->iov_base += a_uio->uio_iovs.uiovp->iov_len;
+ a_uio->uio_iovs.uiovp->iov_len = 0;
+ }
+ else {
+ a_uio->uio_iovs.uiovp->iov_base += a_count;
+ a_uio->uio_iovs.uiovp->iov_len -= a_count;
+ }
+#if 1 // LP64todo - remove this temp workaround once we go live with uio KPI
+ if (a_uio->uio_resid < 0) {
+ a_uio->uio_resid = 0;
+ }
+ if (a_count > (user_size_t)a_uio->uio_resid) {
+ a_uio->uio_offset += a_uio->uio_resid;
+ a_uio->uio_resid = 0;
+ }
+ else {
+ a_uio->uio_offset += a_count;
+ a_uio->uio_resid -= a_count;
+ }
+#else
+ if (a_uio->uio_resid_64 < 0) {
+ a_uio->uio_resid_64 = 0;
+ }
+ if (a_count > (user_size_t)a_uio->uio_resid_64) {
+ a_uio->uio_offset += a_uio->uio_resid_64;
+ a_uio->uio_resid_64 = 0;
+ }
+ else {
+ a_uio->uio_offset += a_count;
+ a_uio->uio_resid_64 -= a_count;
+ }
+#endif // LP64todo
+ }
+ /*
+ * advance to next iovec if current one is totally consumed
+ */
+ while (a_uio->uio_iovcnt > 0 && a_uio->uio_iovs.uiovp->iov_len == 0) {
+ a_uio->uio_iovcnt--;
+ if (a_uio->uio_iovcnt > 0) {
+ a_uio->uio_iovs.uiovp++;
+ }
+ }
+ }
+ else {
+ /*
+ * if a_count == 0, then we are asking to skip over
+ * any empty iovs
+ */
+ if (a_count) {
+ if (a_count > a_uio->uio_iovs.kiovp->iov_len) {
+ a_uio->uio_iovs.kiovp->iov_base += a_uio->uio_iovs.kiovp->iov_len;
+ a_uio->uio_iovs.kiovp->iov_len = 0;
+ }
+ else {
+ a_uio->uio_iovs.kiovp->iov_base += a_count;
+ a_uio->uio_iovs.kiovp->iov_len -= a_count;
+ }
+ if (a_uio->uio_resid < 0) {
+ a_uio->uio_resid = 0;
+ }
+ if (a_count > (user_size_t)a_uio->uio_resid) {
+ a_uio->uio_offset += a_uio->uio_resid;
+ a_uio->uio_resid = 0;
+ }
+ else {
+ a_uio->uio_offset += a_count;
+ a_uio->uio_resid -= a_count;
+ }
+ }
+ /*
+ * advance to next iovec if current one is totally consumed
+ */
+ while (a_uio->uio_iovcnt > 0 && a_uio->uio_iovs.kiovp->iov_len == 0) {
+ a_uio->uio_iovcnt--;
+ if (a_uio->uio_iovcnt > 0) {
+ a_uio->uio_iovs.kiovp++;
+ }
+ }
+ }
+ return;
+}
+
+
+/*
+ * uio_duplicate - allocate a new uio and make a copy of the given uio_t.
+ * may return NULL.
+ */
+uio_t uio_duplicate( uio_t a_uio )
+{
+ uio_t my_uio;
+ int i;
+
+ if (a_uio == NULL) {
+ return(NULL);
+ }
+
+ my_uio = (uio_t) kalloc(a_uio->uio_size);
+ if (my_uio == 0) {
+ panic("%s :%d - allocation failed\n", __FILE__, __LINE__);
+ }
+
+ bcopy((void *)a_uio, (void *)my_uio, a_uio->uio_size);
+ /* need to set our iovec pointer to point to first active iovec */
+ if (my_uio->uio_max_iovs > 0) {
+ my_uio->uio_iovs.uiovp = (struct user_iovec *)
+ (((uint8_t *)my_uio) + sizeof(struct uio));
+
+ /* advance to first nonzero iovec */
+ if (my_uio->uio_iovcnt > 0) {
+ for ( i = 0; i < my_uio->uio_max_iovs; i++ ) {
+ if (UIO_IS_64_BIT_SPACE(a_uio)) {
+ if (my_uio->uio_iovs.uiovp->iov_len != 0) {
+ break;
+ }
+ my_uio->uio_iovs.uiovp++;
+ }
+ else {
+ if (my_uio->uio_iovs.kiovp->iov_len != 0) {
+ break;
+ }
+ my_uio->uio_iovs.kiovp++;
+ }
+ }
+ }
+ }
+
+ return(my_uio);
+}
+
projects / apple / xnu.git / blobdiff