/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
* 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
+ * 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.
+ *
+ * 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,
* 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 */
/*
* @(#)kern_subr.c 8.3 (Berkeley) 1/21/94
*/
+#include <machine/atomic.h>
+
#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 uint32_t uio_t_count = 0;
+#endif /* DEBUG */
+#define IS_VALID_UIO_SEGFLG(segflg) \
+ ( (segflg) == UIO_USERSPACE || \
+ (segflg) == UIO_SYSSPACE || \
+ (segflg) == UIO_USERSPACE32 || \
+ (segflg) == UIO_USERSPACE64 || \
+ (segflg) == UIO_SYSSPACE32 || \
+ (segflg) == UIO_USERISPACE || \
+ (segflg) == UIO_PHYS_USERSPACE || \
+ (segflg) == UIO_PHYS_SYSSPACE || \
+ (segflg) == UIO_USERISPACE32 || \
+ (segflg) == UIO_PHYS_USERSPACE32 || \
+ (segflg) == UIO_USERISPACE64 || \
+ (segflg) == UIO_PHYS_USERSPACE64 )
+
+/*
+ * Returns: 0 Success
+ * uiomove64:EFAULT
+ *
+ * Notes: The first argument should be a caddr_t, but const poisoning
+ * for typedef'ed types doesn't work in gcc.
+ */
int
-uiomove(cp, n, uio)
- register caddr_t cp;
- register int n;
- register struct uio *uio;
+uiomove(const char * cp, int n, uio_t uio)
{
- return uiomove64((addr64_t)((unsigned int)cp), n, uio);
+ return uiomove64((const addr64_t)(uintptr_t)cp, n, uio);
}
+/*
+ * Returns: 0 Success
+ * EFAULT
+ * copyout:EFAULT
+ * copyin:EFAULT
+ * copywithin:EFAULT
+ * copypv:EFAULT
+ */
int
-uiomove64(addr64_t cp, int n, struct uio *uio)
+uiomove64(const addr64_t c_cp, int n, struct uio *uio)
{
- register struct iovec *iov;
- u_int cnt;
+ addr64_t cp = c_cp;
+ uint64_t acnt;
int error = 0;
#if DIAGNOSTIC
- if (uio->uio_rw != UIO_READ && uio->uio_rw != UIO_WRITE)
+ 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++;
- uio->uio_iovcnt--;
+#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)) {
+ uio_update(uio, 0);
+ acnt = uio_curriovlen(uio);
+ if (acnt == 0) {
continue;
}
- if (cnt > n)
- cnt = n;
- switch (uio->uio_segflg) {
+ if (n > 0 && acnt > (uint64_t)n) {
+ acnt = n;
+ }
+ switch ((int) uio->uio_segflg) {
+ case UIO_USERSPACE64:
+ case UIO_USERISPACE64:
+ 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);
-
- error = copyout( CAST_DOWN(caddr_t, cp), iov->iov_base, cnt );
-
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
- (int)cp, (int)iov->iov_base, cnt, 0,0);
- }
- else
- {
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
- (int)iov->iov_base, (int)cp, cnt, 0,0);
-
- error = copyin(iov->iov_base, CAST_DOWN(caddr_t, cp), cnt);
-
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
- (int)iov->iov_base, (int)cp, cnt, 0,0);
- }
- if (error)
- return (error);
+ // 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, (uintptr_t)uio->uio_iovs.uiovp->iov_base, acnt, 0, 0);
+
+ error = copyout( CAST_DOWN(caddr_t, cp), uio->uio_iovs.uiovp->iov_base, (size_t)acnt );
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_END,
+ (int)cp, (uintptr_t)uio->uio_iovs.uiovp->iov_base, acnt, 0, 0);
+ } else {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
+ (uintptr_t)uio->uio_iovs.uiovp->iov_base, (int)cp, acnt, 0, 0);
+
+ error = copyin(uio->uio_iovs.uiovp->iov_base, CAST_DOWN(caddr_t, cp), (size_t)acnt);
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
+ (uintptr_t)uio->uio_iovs.uiovp->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);
- else
- error = copywithin(iov->iov_base, CAST_DOWN(caddr_t, cp),
- cnt);
+ if (uio->uio_rw == UIO_READ) {
+ error = copywithin(CAST_DOWN(caddr_t, cp), CAST_DOWN(caddr_t, uio->uio_iovs.kiovp->iov_base),
+ (size_t)acnt);
+ } else {
+ error = copywithin(CAST_DOWN(caddr_t, uio->uio_iovs.kiovp->iov_base), CAST_DOWN(caddr_t, cp),
+ (size_t)acnt);
+ }
break;
+ case UIO_PHYS_USERSPACE64:
+ 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);
-
- if (error = copypv((addr64_t)cp, (addr64_t)((unsigned int)iov->iov_base), cnt, cppvPsrc | cppvNoRefSrc)) /* 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);
- }
- else
- {
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
- (int)iov->iov_base, (int)cp, cnt, 1,0);
-
- if (error = copypv((addr64_t)((unsigned int)iov->iov_base), (addr64_t)cp, cnt, cppvPsnk | cppvNoRefSrc | cppvNoModSnk)) /* 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);
- }
- if (error)
- return (error);
+ acnt = MIN(acnt, UINT_MAX);
+
+ if (uio->uio_rw == UIO_READ) {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
+ (int)cp, (uintptr_t)uio->uio_iovs.uiovp->iov_base, acnt, 1, 0);
+
+ error = copypv((addr64_t)cp, uio->uio_iovs.uiovp->iov_base, (unsigned int)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, (uintptr_t)uio->uio_iovs.uiovp->iov_base, acnt, 1, 0);
+ } else {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
+ (uintptr_t)uio->uio_iovs.uiovp->iov_base, (int)cp, acnt, 1, 0);
+
+ error = copypv(uio->uio_iovs.uiovp->iov_base, (addr64_t)cp, (unsigned int)acnt, cppvPsnk | cppvNoRefSrc | cppvNoModSnk);
+ if (error) { /* Copy virtual to physical */
+ error = EFAULT;
+ }
+
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
+ (uintptr_t)uio->uio_iovs.uiovp->iov_base, (int)cp, acnt, 1, 0);
+ }
+ if (error) {
+ return error;
+ }
break;
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);
-
- if (error = copypv((addr64_t)cp, (addr64_t)((unsigned int)iov->iov_base), cnt, cppvKmap | cppvPsrc | cppvNoRefSrc)) /* 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);
- }
- else
- {
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
- (int)iov->iov_base, (int)cp, cnt, 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 = EFAULT;
-
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_END,
- (int)iov->iov_base, (int)cp, cnt, 2,0);
- }
- if (error)
- return (error);
+ acnt = MIN(acnt, UINT_MAX);
+
+ if (uio->uio_rw == UIO_READ) {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYOUT)) | DBG_FUNC_START,
+ (int)cp, (uintptr_t)uio->uio_iovs.kiovp->iov_base, acnt, 2, 0);
+
+ error = copypv((addr64_t)cp, uio->uio_iovs.kiovp->iov_base, (unsigned int)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, (uintptr_t)uio->uio_iovs.kiovp->iov_base, acnt, 2, 0);
+ } else {
+ KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, DBG_UIO_COPYIN)) | DBG_FUNC_START,
+ (uintptr_t)uio->uio_iovs.kiovp->iov_base, (int)cp, acnt, 2, 0);
+
+ error = copypv(uio->uio_iovs.kiovp->iov_base, (addr64_t)cp, (unsigned int)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,
+ (uintptr_t)uio->uio_iovs.kiovp->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;
- }
- return (error);
+ uio_update(uio, (user_size_t)acnt);
+ cp += acnt;
+ n -= acnt;
+ }
+ return error;
}
/*
* Give next character to user as result of read.
*/
int
-ureadc(c, uio)
- register int c;
- register struct uio *uio;
+ureadc(int c, 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)
+ }
+ uio_update(uio, 0);
+ if (uio->uio_iovcnt == 0) {
panic("ureadc: non-positive iovcnt");
- iov = uio->uio_iov;
- if (iov->iov_len <= 0) {
- uio->uio_iovcnt--;
- uio->uio_iov++;
- goto again;
}
- switch (uio->uio_segflg) {
+ if (uio_curriovlen(uio) <= 0) {
+ panic("ureadc: non-positive iovlen");
+ }
+ switch ((int) uio->uio_segflg) {
+ case UIO_USERSPACE32:
case UIO_USERSPACE:
- if (subyte(iov->iov_base, c) < 0)
- return (EFAULT);
+ case UIO_USERISPACE32:
+ case UIO_USERISPACE:
+ case UIO_USERSPACE64:
+ case UIO_USERISPACE64:
+ if (subyte((user_addr_t)uio->uio_iovs.uiovp->iov_base, c) < 0) {
+ return EFAULT;
+ }
break;
+ case UIO_SYSSPACE32:
case UIO_SYSSPACE:
- *iov->iov_base = c;
+ *(CAST_DOWN(caddr_t, uio->uio_iovs.kiovp->iov_base)) = (char)c;
break;
- case UIO_USERISPACE:
- if (suibyte(iov->iov_base, c) < 0)
- return (EFAULT);
+ default:
break;
}
- iov->iov_base++;
- iov->iov_len--;
- uio->uio_resid--;
- uio->uio_offset++;
- return (0);
+ uio_update(uio, 1);
+ return 0;
+}
+
+LIST_HEAD(generic_hash_head, generic);
+
+/*
+ * General routine to allocate a hash table.
+ */
+void *
+hashinit(int elements, int type __unused, u_long *hashmask)
+{
+ struct generic_hash_head *hashtbl;
+ vm_size_t hashsize;
+
+ if (elements <= 0) {
+ panic("hashinit: bad cnt");
+ }
+
+ hashsize = 1UL << (fls(elements) - 1);
+ hashtbl = kheap_alloc(KHEAP_DEFAULT, hashsize * sizeof(*hashtbl),
+ Z_WAITOK | Z_ZERO);
+ if (hashtbl != NULL) {
+ *hashmask = hashsize - 1;
+ }
+ return hashtbl;
+}
+
+void
+hashdestroy(void *hash, int type __unused, u_long hashmask)
+{
+ struct generic_hash_head *hashtbl = hash;
+ assert(powerof2(hashmask + 1));
+ kheap_free(KHEAP_DEFAULT, hashtbl, (hashmask + 1) * sizeof(*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) {
+ printf("%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;
+ }
+
+ return a_uio->uio_resid_64;
+}
+
+/*
+ * 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;
+ }
+
+ a_uio->uio_resid_64 = a_value;
+ return;
+}
+
+/*
+ * 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_USER_SPACE(a_uio)) {
+ return a_uio->uio_iovs.uiovp->iov_base;
+ }
+ return (user_addr_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_USER_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_USER_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;
}
-#if defined(vax) || defined(ppc)
-/* unused except by ct.c, other oddities XXX */
/*
- * Get next character written in by user from uio.
+ * 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;
+ size_t my_size;
+ uio_t my_uio;
+
+ my_size = UIO_SIZEOF(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
+ os_atomic_inc(&uio_t_count, relaxed);
+#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.
*/
-uwritec(uio)
- struct uio *uio;
+__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 */
+ size_t a_buffer_size ) /* size of uio_t buffer */
{
- register struct iovec *iov;
- register int c;
-
- if (uio->uio_resid <= 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->uio_iovcnt == 0)
- return (-1);
- goto again;
- }
- switch (uio->uio_segflg) {
+ uio_t my_uio = (uio_t) a_buf_p;
+ size_t my_size;
+ assert(a_iovcount >= 0 && a_iovcount <= UIO_MAXIOV);
+ if (a_iovcount < 0 || a_iovcount > UIO_MAXIOV) {
+ return NULL;
+ }
+
+ my_size = UIO_SIZEOF(a_iovcount);
+ assert(a_buffer_size >= my_size);
+ if (a_buffer_size < my_size) {
+ return NULL;
+ }
+ my_size = a_buffer_size;
+
+ assert(my_size <= INT_MAX);
+ if (my_size > INT_MAX) {
+ return NULL;
+ }
+
+ assert(my_uio != NULL);
+ assert(IS_VALID_UIO_SEGFLG(a_spacetype));
+ assert(a_iodirection == UIO_READ || a_iodirection == UIO_WRITE);
+
+ bzero(my_uio, my_size);
+ my_uio->uio_size = (int)my_size;
+
+ /*
+ * we use uio_segflg to indicate if the uio_t is the new format or
+ * old (pre LP64 support) legacy format
+ * This switch statement should canonicalize incoming space type
+ * to one of UIO_USERSPACE32/64, UIO_PHYS_USERSPACE32/64, or
+ * UIO_SYSSPACE/UIO_PHYS_SYSSPACE
+ */
+ switch (a_spacetype) {
case UIO_USERSPACE:
- c = fubyte(iov->iov_base);
+ my_uio->uio_segflg = UIO_USERSPACE32;
break;
-
- case UIO_SYSSPACE:
- c = *iov->iov_base & 0377;
+ case UIO_SYSSPACE32:
+ my_uio->uio_segflg = UIO_SYSSPACE;
break;
-
- case UIO_USERISPACE:
- c = fuibyte(iov->iov_base);
+ case UIO_PHYS_USERSPACE:
+ my_uio->uio_segflg = UIO_PHYS_USERSPACE32;
+ break;
+ 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
+ */
+__private_extern__ 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.
+ */
+__private_extern__ struct user_iovec *
+uio_iovsaddr( uio_t a_uio )
+{
+ struct user_iovec * my_addr;
+
+ if (a_uio == NULL) {
+ return NULL;
+ }
+
+ if (UIO_SEG_IS_USER_SPACE(a_uio->uio_segflg)) {
+ /* we need this for compatibility mode. */
+ my_addr = (struct user_iovec *) a_uio->uio_iovs.uiovp;
+ } else {
+#if DEBUG
+ panic("uio_iovsaddr called for UIO_SYSSPACE request");
+#endif
+ my_addr = 0;
+ }
+ 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 = (int)my_size;
+
+ /*
+ * we use uio_segflg to indicate if the uio_t is the new format or
+ * old (pre LP64 support) legacy format
+ * This switch statement should canonicalize incoming space type
+ * to one of UIO_USERSPACE32/64, UIO_PHYS_USERSPACE32/64, or
+ * UIO_SYSSPACE/UIO_PHYS_SYSSPACE
+ */
+ switch (a_spacetype) {
+ case UIO_USERSPACE:
+ a_uio->uio_segflg = UIO_USERSPACE32;
+ break;
+ case UIO_SYSSPACE32:
+ a_uio->uio_segflg = UIO_SYSSPACE;
+ break;
+ case UIO_PHYS_USERSPACE:
+ a_uio->uio_segflg = UIO_PHYS_USERSPACE32;
+ break;
default:
- c = 0; /* avoid uninitialized variable warning */
- panic("uwritec: bogus uio_segflg");
+ a_uio->uio_segflg = a_spacetype;
break;
}
- if (c < 0)
- return (-1);
- iov->iov_base++;
- iov->iov_len--;
- uio->uio_resid--;
- uio->uio_offset++;
- return (c);
+
+ 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;
}
-#endif /* vax || ppc */
/*
- * General routine to allocate a hash table.
+ * uio_free - free a uio_t allocated via uio_init. this also frees all
+ * associated iovecs.
*/
-void *
-hashinit(elements, type, hashmask)
- int elements, type;
- u_long *hashmask;
+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 (os_atomic_dec_orig(&uio_t_count, relaxed) == 0) {
+ panic("%s :%d - uio_t_count underflow\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 )
{
- long hashsize;
- LIST_HEAD(generic, generic) *hashtbl;
int i;
+ user_size_t resid;
- if (elements <= 0)
- panic("hashinit: bad cnt");
- for (hashsize = 1; hashsize <= elements; hashsize <<= 1)
- 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;
- return (hashtbl);
+ if (a_uio == NULL) {
+#if DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif
+ return -1;
+ }
+
+ if (os_add_overflow(a_length, a_uio->uio_resid_64, &resid)) {
+#if DEBUG
+ panic("%s :%d - invalid length %lu\n", __FILE__, __LINE__, (unsigned long)a_length);
+#endif
+ return -1;
+ }
+
+ if (UIO_IS_USER_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++;
+ a_uio->uio_resid_64 = resid;
+ 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_int64_t)a_length;
+ a_uio->uio_iovs.kiovp[i].iov_base = (u_int64_t)a_baseaddr;
+ a_uio->uio_iovcnt++;
+ a_uio->uio_resid_64 = resid;
+ 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_USER_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 = (user_addr_t)a_uio->uio_iovs.kiovp[a_index].iov_base;
+ }
+ if (a_length_p != NULL) {
+ *a_length_p = (user_size_t)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__ int
+uio_calculateresid( uio_t a_uio )
+{
+ int i;
+ u_int64_t resid = 0;
+
+ if (a_uio == NULL) {
+#if LP64_DEBUG
+ panic("%s :%d - invalid uio_t\n", __FILE__, __LINE__);
+#endif /* LP64_DEBUG */
+ return EINVAL;
+ }
+
+ a_uio->uio_iovcnt = a_uio->uio_max_iovs;
+ if (UIO_IS_USER_SPACE(a_uio)) {
+ a_uio->uio_resid_64 = 0;
+ 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 (a_uio->uio_iovs.uiovp[i].iov_len > LONG_MAX) {
+ return EINVAL;
+ }
+ resid += a_uio->uio_iovs.uiovp[i].iov_len;
+ if (resid > LONG_MAX) {
+ return EINVAL;
+ }
+ }
+ }
+ a_uio->uio_resid_64 = (user_size_t)resid;
+
+ /* 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_64 = 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) {
+ if (a_uio->uio_iovs.kiovp[i].iov_len > LONG_MAX) {
+ return EINVAL;
+ }
+ resid += a_uio->uio_iovs.kiovp[i].iov_len;
+ if (resid > LONG_MAX) {
+ return EINVAL;
+ }
+ }
+ }
+ a_uio->uio_resid_64 = (user_size_t)resid;
+
+ /* 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 0;
+}
+
+/*
+ * 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_USER_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 (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;
+ }
+ }
+ /*
+ * 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_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;
+ }
+ }
+ /*
+ * 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_pushback - undo uncommitted I/O by subtracting from the
+ * current base address and offset, and incrementing the residiual
+ * IO. If the UIO was previously exhausted, this call will panic.
+ * New code should not use this functionality.
+ */
+__private_extern__ void
+uio_pushback( 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_count == 0) {
+ return;
+ }
+
+ if (a_uio->uio_iovcnt < 1) {
+ panic("Invalid uio for pushback");
+ }
+
+ if (UIO_IS_USER_SPACE(a_uio)) {
+ a_uio->uio_iovs.uiovp->iov_base -= a_count;
+ a_uio->uio_iovs.uiovp->iov_len += a_count;
+ } else {
+ a_uio->uio_iovs.kiovp->iov_base -= a_count;
+ a_uio->uio_iovs.kiovp->iov_len += a_count;
+ }
+
+ a_uio->uio_offset -= a_count;
+ a_uio->uio_resid_64 += a_count;
+
+ 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_USER_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++;
+ }
+ }
+ }
+ }
+
+ my_uio->uio_flags = UIO_FLAGS_WE_ALLOCED | UIO_FLAGS_INITED;
+#if DEBUG
+ os_atomic_inc(&uio_t_count, relaxed);
+#endif
+
+
+ return my_uio;
+}
+
+int
+copyin_user_iovec_array(user_addr_t uaddr, int spacetype, int count, struct user_iovec *dst)
+{
+ size_t size_of_iovec = (spacetype == UIO_USERSPACE64 ? sizeof(struct user64_iovec) : sizeof(struct user32_iovec));
+ int error;
+ int i;
+
+ // copyin to the front of "dst", without regard for putting records in the right places
+ error = copyin(uaddr, dst, count * size_of_iovec);
+ if (error) {
+ return error;
+ }
+
+ // now, unpack the entries in reverse order, so we don't overwrite anything
+ for (i = count - 1; i >= 0; i--) {
+ if (spacetype == UIO_USERSPACE64) {
+ struct user64_iovec iovec = ((struct user64_iovec *)dst)[i];
+ dst[i].iov_base = (user_addr_t)iovec.iov_base;
+ dst[i].iov_len = (user_size_t)iovec.iov_len;
+ } else {
+ struct user32_iovec iovec = ((struct user32_iovec *)dst)[i];
+ dst[i].iov_base = iovec.iov_base;
+ dst[i].iov_len = iovec.iov_len;
+ }
+ }
+
+ return 0;
}
projects / apple / xnu.git / blobdiff