X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/91447636331957f3d9b5ca5b508f07c526b0074d..15129b1c8dbb3650c63b70adb1cad9af601c6c17:/bsd/sys/uio_internal.h diff --git a/bsd/sys/uio_internal.h b/bsd/sys/uio_internal.h index a2a7cc0f5..959eb501c 100644 --- a/bsd/sys/uio_internal.h +++ b/bsd/sys/uio_internal.h @@ -1,23 +1,29 @@ /* * 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 */ /* @@ -63,6 +69,7 @@ #ifdef KERNEL_PRIVATE #include #include +#include /* * user / kernel address space type flags. @@ -81,45 +88,50 @@ #define UIO_USERISPACE64 9 #define UIO_PHYS_USERSPACE64 10 // UIO_SYSSPACE32 11 defined in uio.h -#define UIO_PHYS_SYSSPACE32 12 -#define UIO_SYSSPACE64 13 -#define UIO_PHYS_SYSSPACE64 14 +// UIO_PHYS_SYSSPACE32 12 reserved, never used. Use UIO_PHYS_SYSSPACE +// UIO_SYSSPACE64 13 reserved, never used. Use UIO_SYSSPACE +// UIO_PHYS_SYSSPACE64 14 reserved, never used. Use UIO_PHYS_SYSSPACE __BEGIN_DECLS struct user_iovec; -// uio_iovsaddr was __private_extern__ temporary chnage for 3777436 -struct user_iovec * uio_iovsaddr( uio_t a_uio ); -__private_extern__ void uio_calculateresid( uio_t a_uio ); +#ifdef XNU_KERNEL_PRIVATE +__private_extern__ struct user_iovec * uio_iovsaddr( uio_t a_uio ); +__private_extern__ int uio_calculateresid( uio_t a_uio ); __private_extern__ void uio_setcurriovlen( uio_t a_uio, user_size_t a_value ); -// uio_spacetype was __private_extern__ temporary chnage for 3777436 -int uio_spacetype( uio_t a_uio ); -__private_extern__ uio_t - uio_createwithbuffer( int a_iovcount, off_t a_offset, int a_spacetype, - int a_iodirection, void *a_buf_p, int a_buffer_size ); +__private_extern__ int uio_spacetype( uio_t a_uio ); +__private_extern__ uio_t uio_createwithbuffer( int a_iovcount, off_t a_offset, int a_spacetype, int a_iodirection, void *a_buf_p, size_t a_buffer_size ); +__private_extern__ int copyin_user_iovec_array(user_addr_t uaddr, int spacetype, int count, struct user_iovec *dst); +/* reverse of uio_update to "undo" uncommited I/O. This only works in + * limited cases */ +__private_extern__ void uio_pushback( uio_t a_uio, user_size_t a_count ); +#endif /* XNU_KERNEL_PRIVATE */ /* use kern_iovec for system space requests */ struct kern_iovec { - u_int32_t iov_base; /* Base address. */ - u_int32_t iov_len; /* Length. */ + u_int64_t iov_base; /* Base address. */ + u_int64_t iov_len; /* Length. */ }; - + /* use user_iovec for user space requests */ struct user_iovec { user_addr_t iov_base; /* Base address. */ user_size_t iov_len; /* Length. */ }; -#if 1 // LP64todo - remove this after kext adopt new KPI -#define uio_iov uio_iovs.iovp -#define iovec_32 kern_iovec -#define iovec_64 user_iovec -#define iov32p kiovp -#define iov64p uiovp -#endif +/* use user32_iovec/user64_iovec for representing + * in-memory structures in 32-64 processes during copyin */ +struct user32_iovec { + uint32_t iov_base; /* Base address. */ + uint32_t iov_len; /* Length. */ +}; + +struct user64_iovec { + uint64_t iov_base; /* Base address. */ + uint64_t iov_len; /* Length. */ +}; union iovecs { - struct iovec *iovp; struct kern_iovec *kiovp; struct user_iovec *uiovp; }; @@ -130,10 +142,8 @@ struct uio { union iovecs uio_iovs; /* current iovec */ int uio_iovcnt; /* active iovecs */ off_t uio_offset; - int uio_resid; /* compatibility uio_resid (pre-LP64) */ enum uio_seg uio_segflg; enum uio_rw uio_rw; - proc_t uio_procp; /* obsolete - not used! */ user_ssize_t uio_resid_64; int uio_size; /* size for use with kfree */ int uio_max_iovs; /* max number of iovecs this uio_t can hold */ @@ -143,6 +153,7 @@ struct uio { /* values for uio_flags */ #define UIO_FLAGS_INITED 0x00000001 #define UIO_FLAGS_WE_ALLOCED 0x00000002 +#define UIO_FLAGS_IS_COMPRESSED_FILE 0x00000004 __END_DECLS @@ -152,20 +163,8 @@ __END_DECLS * create a stack buffer that can be passed to uio_createwithbuffer. */ #define UIO_SIZEOF( a_iovcount ) \ - ( sizeof(struct uio) + (sizeof(struct user_iovec) * (a_iovcount)) ) + ( sizeof(struct uio) + (MAX(sizeof(struct user_iovec), sizeof(struct kern_iovec)) * (a_iovcount)) ) -#define UIO_IS_64_BIT_SPACE( a_uio_t ) \ - ( (a_uio_t)->uio_segflg == UIO_USERSPACE64 || (a_uio_t)->uio_segflg == UIO_USERISPACE64 || \ - (a_uio_t)->uio_segflg == UIO_PHYS_USERSPACE64 || (a_uio_t)->uio_segflg == UIO_SYSSPACE64 || \ - (a_uio_t)->uio_segflg == UIO_PHYS_SYSSPACE64 ) - -#define UIO_IS_32_BIT_SPACE( a_uio_t ) \ - ( (a_uio_t)->uio_segflg == UIO_USERSPACE || (a_uio_t)->uio_segflg == UIO_USERISPACE || \ - (a_uio_t)->uio_segflg == UIO_SYSSPACE || (a_uio_t)->uio_segflg == UIO_PHYS_USERSPACE || \ - (a_uio_t)->uio_segflg == UIO_USERISPACE32 || (a_uio_t)->uio_segflg == UIO_PHYS_USERSPACE32 || \ - (a_uio_t)->uio_segflg == UIO_SYSSPACE32 || (a_uio_t)->uio_segflg == UIO_PHYS_SYSSPACE32 || \ - (a_uio_t)->uio_segflg == UIO_PHYS_SYSSPACE || (a_uio_t)->uio_segflg == UIO_USERSPACE32 ) - #define UIO_IS_USER_SPACE32( a_uio_t ) \ ( (a_uio_t)->uio_segflg == UIO_USERSPACE32 || (a_uio_t)->uio_segflg == UIO_PHYS_USERSPACE32 || \ (a_uio_t)->uio_segflg == UIO_USERISPACE32 ) @@ -176,270 +175,11 @@ __END_DECLS ( UIO_IS_USER_SPACE32((a_uio_t)) || UIO_IS_USER_SPACE64((a_uio_t)) || \ (a_uio_t)->uio_segflg == UIO_USERSPACE || (a_uio_t)->uio_segflg == UIO_USERISPACE || \ (a_uio_t)->uio_segflg == UIO_PHYS_USERSPACE ) +#define UIO_IS_SYS_SPACE( a_uio_t ) \ + ( (a_uio_t)->uio_segflg == UIO_SYSSPACE || (a_uio_t)->uio_segflg == UIO_PHYS_SYSSPACE || \ + (a_uio_t)->uio_segflg == UIO_SYSSPACE32 ) - -/* - * W A R N I N G!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! - * anything in this section will be removed. please move to the uio KPI - */ - -#if 1 // UIO_KPI - WARNING OBSOLETE!!!! LP64todo - remove these!!!! -// DO NOT USE THESE -#define IS_UIO_USER_SPACE32( segflg ) \ - ( (segflg) == UIO_USERSPACE32 || (segflg) == UIO_PHYS_USERSPACE32 || \ - (segflg) == UIO_USERISPACE32 ) -#define IS_UIO_USER_SPACE64( segflg ) \ - ( (segflg) == UIO_USERSPACE64 || (segflg) == UIO_PHYS_USERSPACE64 || \ - (segflg) == UIO_USERISPACE64 ) -#define IS_UIO_USER_SPACE( segflg ) \ - ( IS_UIO_USER_SPACE32((segflg)) || IS_UIO_USER_SPACE64((segflg)) || \ - (segflg) == UIO_USERSPACE || (segflg) == UIO_USERISPACE || \ - (segflg) == UIO_PHYS_USERSPACE ) - -#define IS_UIO_SYS_SPACE32( segflg ) \ - ( (segflg) == UIO_SYSSPACE32 || (segflg) == UIO_PHYS_SYSSPACE32 || \ - (segflg) == UIO_SYSSPACE || (segflg) == UIO_PHYS_SYSSPACE ) -#define IS_UIO_SYS_SPACE64( segflg ) \ - ( (segflg) == UIO_SYSSPACE64 || (segflg) == UIO_PHYS_SYSSPACE64 ) -#define IS_UIO_SYS_SPACE( segflg ) \ - ( IS_UIO_SYS_SPACE32((segflg)) || IS_UIO_SYS_SPACE64((segflg)) ) - -#define IS_OBSOLETE_UIO_SEGFLG(segflg) \ - ( (segflg) == UIO_USERSPACE || (segflg) == UIO_USERISPACE || \ - (segflg) == UIO_SYSSPACE || (segflg) == UIO_PHYS_USERSPACE || \ - (segflg) == UIO_PHYS_SYSSPACE ) -#define IS_VALID_UIO_SEGFLG(segflg) \ - ( IS_UIO_USER_SPACE((segflg)) || IS_UIO_SYS_SPACE((segflg)) ) - -/* accessor routines for uio and embedded iovecs */ -// WARNING all these are OBSOLETE!!!! -static inline int64_t uio_uio_resid( struct uio *a_uiop ); -static inline void uio_uio_resid_add( struct uio *a_uiop, int64_t a_amount ); -static inline void uio_uio_resid_set( struct uio *a_uiop, int64_t a_value ); - -static inline void uio_iov_base_add( struct uio *a_uiop, int64_t a_amount ); -static inline void uio_iov_base_add_at( struct uio *a_uiop, int64_t a_amount, int a_index ); -static inline void uio_iov_len_add( struct uio *a_uiop, int64_t a_amount ); -static inline void uio_iov_len_add_at( struct uio *a_uiop, int64_t a_amount, int a_index ); -static inline u_int64_t uio_iov_len( struct uio *a_uiop ); -static inline u_int64_t uio_iov_len_at( struct uio *a_uiop, int a_index ); -static inline u_int64_t uio_iov_base( struct uio *a_uiop ); -static inline u_int64_t uio_iov_base_at( struct uio *a_uiop, int a_index ); -static inline void uio_next_iov( struct uio *a_uiop ); -static inline void uio_iov_len_set( struct uio *a_uiop, u_int64_t a_value ); -static inline void uio_iov_len_set_at( struct uio *a_uiop, u_int64_t a_value, int a_index ); - - -static inline int64_t uio_uio_resid( struct uio *a_uiop ) -{ -//#warning obsolete - use uio_resid call - return( (int64_t)a_uiop->uio_resid ); -} - -static inline void uio_uio_resid_add( struct uio *a_uiop, int64_t a_amount ) -{ -//#warning obsolete - use uio_update or uio_addiov or uio_setresid if in kernel and you must - a_uiop->uio_resid += ((int32_t) a_amount); -} - -static inline void uio_uio_resid_set( struct uio *a_uiop, int64_t a_value ) -{ -//#warning obsolete - use uio_update or uio_addiov or uio_setresid if in kernel and you must - a_uiop->uio_resid = a_value; -} - -static inline u_int64_t uio_iov_base( struct uio *a_uiop ) -{ -//#warning obsolete - use uio_curriovbase call - return(uio_iov_base_at(a_uiop, 0)); -} - -static inline u_int64_t uio_iov_base_at( struct uio *a_uiop, int a_index ) -{ -//#warning obsolete - use uio_curriovbase call - if (IS_UIO_USER_SPACE32(a_uiop->uio_segflg) || IS_OBSOLETE_UIO_SEGFLG(a_uiop->uio_segflg)) { - /* user space iovec was most likely a struct iovec so we must cast to uintptr_t first */ - return((u_int64_t)((uintptr_t)a_uiop->uio_iovs.iov32p[a_index].iov_base)); - } - if (IS_UIO_SYS_SPACE32(a_uiop->uio_segflg)) { - return((u_int64_t)a_uiop->uio_iovs.iov32p[a_index].iov_base); - } - if (IS_UIO_USER_SPACE64(a_uiop->uio_segflg) || IS_UIO_SYS_SPACE64(a_uiop->uio_segflg)) { - return(a_uiop->uio_iovs.iov64p[a_index].iov_base); - } - return(0); -} - -static inline u_int64_t uio_iov_len( struct uio *a_uiop ) -{ -//#warning obsolete - use uio_curriovlen call - return(uio_iov_len_at(a_uiop, 0)); -} - -static inline u_int64_t uio_iov_len_at( struct uio *a_uiop, int a_index ) -{ -//#warning obsolete - use uio_curriovlen call - if (IS_UIO_USER_SPACE32(a_uiop->uio_segflg) || - IS_UIO_SYS_SPACE32(a_uiop->uio_segflg) || - IS_OBSOLETE_UIO_SEGFLG(a_uiop->uio_segflg)) { - return((u_int64_t)a_uiop->uio_iovs.iov32p[a_index].iov_len); - } - if (IS_UIO_USER_SPACE64(a_uiop->uio_segflg) || IS_UIO_SYS_SPACE64(a_uiop->uio_segflg)) { - return(a_uiop->uio_iovs.iov64p[a_index].iov_len); - } - return(0); -} - -static inline void uio_iov_len_set_at( struct uio *a_uiop, u_int64_t a_value, int a_index ) -{ -//#warning obsolete - use uio_addiov call - if (IS_UIO_USER_SPACE32(a_uiop->uio_segflg) || - IS_UIO_SYS_SPACE32(a_uiop->uio_segflg) || - IS_OBSOLETE_UIO_SEGFLG(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov32p[a_index].iov_len = a_value; - } - else if (IS_UIO_USER_SPACE64(a_uiop->uio_segflg) || IS_UIO_SYS_SPACE64(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov64p[a_index].iov_len = a_value; - } - return; -} - -static inline void uio_iov_len_set( struct uio *a_uiop, u_int64_t a_value ) -{ -//#warning obsolete - use uio_addiov call - return(uio_iov_len_set_at(a_uiop, a_value, 0)); -} - -static inline void uio_iov_len_add_at( struct uio *a_uiop, int64_t a_amount, int a_index ) -{ -//#warning obsolete - use uio_addiov call - if (IS_UIO_USER_SPACE32(a_uiop->uio_segflg) || - IS_UIO_SYS_SPACE32(a_uiop->uio_segflg) || - IS_OBSOLETE_UIO_SEGFLG(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov32p[a_index].iov_len += ((int32_t) a_amount); - } - else if (IS_UIO_USER_SPACE64(a_uiop->uio_segflg) || IS_UIO_SYS_SPACE64(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov64p[a_index].iov_len += a_amount; - } - return; -} - -static inline void uio_iov_len_add( struct uio *a_uiop, int64_t a_amount ) -{ -//#warning obsolete - use uio_addiov call - return(uio_iov_len_add_at(a_uiop, a_amount, 0)); -} - -static inline void uio_iov_base_add_at( struct uio *a_uiop, int64_t a_amount, int a_index ) -{ -//#warning obsolete - use uio_addiov call - if (IS_UIO_USER_SPACE32(a_uiop->uio_segflg) || - IS_UIO_SYS_SPACE32(a_uiop->uio_segflg) || - IS_OBSOLETE_UIO_SEGFLG(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov32p[a_index].iov_base += ((int32_t) a_amount); - } - else if (IS_UIO_USER_SPACE64(a_uiop->uio_segflg) || IS_UIO_SYS_SPACE64(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov64p[a_index].iov_base += a_amount; - } - return; -} - -static inline void uio_iov_base_add( struct uio *a_uiop, int64_t a_amount ) -{ -//#warning obsolete - use uio_addiov call - return(uio_iov_base_add_at(a_uiop, a_amount, 0)); -} - -static inline void uio_next_iov( struct uio *a_uiop ) -{ -//#warning obsolete - use uio_update call - if (IS_UIO_USER_SPACE32(a_uiop->uio_segflg) || - IS_UIO_SYS_SPACE32(a_uiop->uio_segflg) || - IS_OBSOLETE_UIO_SEGFLG(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov32p++; - } - else if (IS_UIO_USER_SPACE64(a_uiop->uio_segflg) || IS_UIO_SYS_SPACE64(a_uiop->uio_segflg)) { - a_uiop->uio_iovs.iov64p++; - } - return; -} - -/* - * WARNING - this routine relies on iovec_64 being larger than iovec_32 and will - * not work if you are going to initialize an array of iovec_64 as an array of - * iovec_32 then pass that array in a uio (since uio_iov is always expected to - * be an array of like sized iovecs - see how uio_next_iov gets to the next iovec) - */ -static inline void init_iovec( u_int64_t a_base, - u_int64_t a_len, - struct iovec_64 *a_iovp, - int is_64bit_process ) -{ -//#warning obsolete - use uio_create call - if (is_64bit_process) { - a_iovp->iov_base = a_base; - a_iovp->iov_len = a_len; - } - else { - struct iovec_32 *a_iov32p = (struct iovec_32 *) a_iovp; - a_iov32p->iov_base = a_base; - a_iov32p->iov_len = a_len; - } - return; -} - -#define INIT_UIO_BASE( uiop, iovcnt, offset, resid, rw, procp ) \ -{ \ - (uiop)->uio_iovcnt = (iovcnt); \ - (uiop)->uio_offset = (offset); \ - (uiop)->uio_resid = (resid); \ - (uiop)->uio_rw = (rw); \ - (uiop)->uio_procp = (procp); \ -} -#define INIT_UIO_USER32( uiop, iovp, iovcnt, offset, resid, rw, procp ) \ -{ \ - (uiop)->uio_iovs.iov32p = (iovp); \ - (uiop)->uio_segflg = UIO_USERSPACE; \ - INIT_UIO_BASE((uiop), (iovcnt), (offset), (resid), (rw), (procp)); \ -} -#define INIT_UIO_USER64( uiop, iovp, iovcnt, offset, resid, rw, procp ) \ -{ \ - (uiop)->uio_iovs.iov64p = (iovp); \ - (uiop)->uio_segflg = UIO_USERSPACE64; \ - INIT_UIO_BASE((uiop), (iovcnt), (offset), (resid), (rw), (procp)); \ -} -#define INIT_UIO_SYS32( uiop, iovp, iovcnt, offset, resid, rw, procp ) \ -{ \ - (uiop)->uio_iovs.iov32p = (iovp); \ - (uiop)->uio_segflg = UIO_SYSSPACE; \ - INIT_UIO_BASE((uiop), (iovcnt), (offset), (resid), (rw), (procp)); \ -} -#define INIT_UIO_USERSPACE( uiop, iovp, iovcnt, offset, resid, rw, procp ) \ -{ \ - if (IS_64BIT_PROCESS((procp))) { \ - (uiop)->uio_iovs.iov64p = (iovp); \ - (uiop)->uio_segflg = UIO_USERSPACE64; \ - } \ - else { \ - (uiop)->uio_iovs.iov32p = (struct iovec_32 *)(iovp); \ - (uiop)->uio_segflg = UIO_USERSPACE; \ - } \ - INIT_UIO_BASE((uiop), (iovcnt), (offset), (resid), (rw), (procp)); \ -} -#define INIT_UIO_SYSSPACE( uiop, iovp, iovcnt, offset, resid, rw, procp ) \ -{ \ - if (0) { /* we do not support 64-bit system space yet */ \ - (uiop)->uio_iovs.iov64p = (iovp); \ - (uiop)->uio_segflg = UIO_SYSSPACE64; \ - } \ - else { \ - (uiop)->uio_iovs.iov32p = (struct iovec_32 *)(iovp); \ - (uiop)->uio_segflg = UIO_SYSSPACE; \ - } \ - INIT_UIO_BASE((uiop), (iovcnt), (offset), (resid), (rw), (procp)); \ -} -#endif // UIO_KPI - WARNING OBSOLETE!!!! - +extern int ureadc(int c, struct uio *uio); -#endif /* KERNEL */ +#endif /* KERNEL_PRIVATE */ #endif /* !_SYS_UIO_INTERNAL_H_ */