X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8ad349bb6ed4a0be06e34c92be0d98b92e078db4..94ff46dc2849db4d43eaaf144872decc522aafb4:/bsd/sys/pipe.h?ds=sidebyside diff --git a/bsd/sys/pipe.h b/bsd/sys/pipe.h index 0eea196a9..e53f05080 100644 --- a/bsd/sys/pipe.h +++ b/bsd/sys/pipe.h @@ -1,31 +1,29 @@ /* * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ - * - * 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. + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ 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. * - * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. - * Please see the License for the specific language governing rights and + * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and * limitations under the License. * - * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1996 John S. Dyson @@ -49,30 +47,40 @@ * * $FreeBSD: src/sys/sys/pipe.h,v 1.24 2003/08/13 20:01:38 alc Exp $ */ +/* + * NOTICE: This file was modified by SPARTA, Inc. in 2006 to introduce + * support for mandatory and extensible security protections. This notice + * is included in support of clause 2.2 (b) of the Apple Public License, + * Version 2.0. + */ #ifndef _SYS_PIPE_H_ #define _SYS_PIPE_H_ -#ifdef KERNEL +#ifdef KERNEL #include #endif -#include /* for TAILQ macros */ +#include /* for TAILQ macros */ #include #include +#include +#include /* * Pipe buffer size, keep moderate in value, pipes take kva space. */ #ifndef PIPE_SIZE -#define PIPE_SIZE 16384 +#define PIPE_SIZE 16384 #endif +#define PIPE_KVAMAX (1024 * 1024 * 16) + #ifndef BIG_PIPE_SIZE -#define BIG_PIPE_SIZE (64*1024) +#define BIG_PIPE_SIZE (64*1024) #endif #ifndef SMALL_PIPE_SIZE -#define SMALL_PIPE_SIZE PAGE_SIZE +#define SMALL_PIPE_SIZE PAGE_SIZE #endif /* @@ -80,10 +88,10 @@ * than PIPE_BUF. */ #ifndef PIPE_MINDIRECT -#define PIPE_MINDIRECT 8192 +#define PIPE_MINDIRECT 8192 #endif -#define PIPENPAGES (BIG_PIPE_SIZE / PAGE_SIZE + 1) +#define PIPENPAGES (BIG_PIPE_SIZE / PAGE_SIZE + 1) /* * Pipe buffer information. @@ -91,11 +99,11 @@ * Buffered write is active when the buffer.cnt field is set. */ struct pipebuf { - u_int cnt; /* number of chars currently in buffer */ - u_int in; /* in pointer */ - u_int out; /* out pointer */ - u_int size; /* size of buffer */ - caddr_t buffer; /* kva of buffer */ + u_int cnt; /* number of chars currently in buffer */ + u_int in; /* in pointer */ + u_int out; /* out pointer */ + u_int size; /* size of buffer */ + caddr_t buffer; /* kva of buffer */ }; @@ -103,63 +111,71 @@ struct pipebuf { /* * Information to support direct transfers between processes for pipes. */ -/* LP64todo - not 64bit safe */ struct pipemapping { - vm_offset_t kva; /* kernel virtual address */ - vm_size_t cnt; /* number of chars in buffer */ - vm_size_t pos; /* current position of transfer */ - int npages; /* number of pages */ - vm_page_t ms[PIPENPAGES]; /* pages in source process */ + vm_offset_t kva; /* kernel virtual address */ + vm_size_t cnt; /* number of chars in buffer */ + vm_size_t pos; /* current position of transfer */ + int npages; /* number of pages */ + vm_page_t ms[PIPENPAGES]; /* pages in source process */ }; #endif /* * Bits in pipe_state. */ -#define PIPE_ASYNC 0x004 /* Async? I/O. */ -#define PIPE_WANTR 0x008 /* Reader wants some characters. */ -#define PIPE_WANTW 0x010 /* Writer wants space to put characters. */ -#define PIPE_WANT 0x020 /* Pipe is wanted to be run-down. */ -#define PIPE_SEL 0x040 /* Pipe has a select active. */ -#define PIPE_EOF 0x080 /* Pipe is in EOF condition. */ -#define PIPE_LOCKFL 0x100 /* Process has exclusive access to pointers/data. */ -#define PIPE_LWANT 0x200 /* Process wants exclusive access to pointers/data. */ -#define PIPE_DIRECTW 0x400 /* Pipe direct write active. */ -#define PIPE_DIRECTOK 0x800 /* Direct mode ok. */ -#define PIPE_KNOTE 0x1000 /* Pipe has kernel events activated */ - -#ifdef KERNEL +#define PIPE_ASYNC 0x004 /* Async? I/O. */ +#define PIPE_WANTR 0x008 /* Reader wants some characters. */ +#define PIPE_WANTW 0x010 /* Writer wants space to put characters. */ +#define PIPE_WANT 0x020 /* Pipe is wanted to be run-down. */ +#define PIPE_SEL 0x040 /* Pipe has a select active. */ +#define PIPE_EOF 0x080 /* Pipe is in EOF condition. */ +#define PIPE_LOCKFL 0x100 /* Process has exclusive access to pointers/data. */ +#define PIPE_LWANT 0x200 /* Process wants exclusive access to pointers/data. */ +#define PIPE_DIRECTW 0x400 /* Pipe direct write active. */ +#define PIPE_DIRECTOK 0x800 /* Direct mode ok. */ +// was PIPE_KNOTE 0x1000 +#define PIPE_DRAIN 0x2000 /* Waiting for I/O to drop for a close. Treated like EOF; + * only separate for easier debugging. */ +#define PIPE_WSELECT 0x4000 /* Some thread has done an FWRITE select on the pipe */ +#define PIPE_DEAD 0x8000 /* Pipe is dead and needs garbage collection */ + +#ifdef KERNEL + +struct label; + /* * Per-pipe data structure. * Two of these are linked together to produce bi-directional pipes. */ struct pipe { - struct pipebuf pipe_buffer; /* data storage */ + struct pipebuf pipe_buffer; /* data storage */ #ifdef PIPE_DIRECT - struct pipemapping pipe_map; /* pipe mapping for direct I/O */ -#endif - struct selinfo pipe_sel; /* for compat with select */ - pid_t pipe_pgid; /* information for async I/O */ - struct pipe *pipe_peer; /* link with other direction */ - u_int pipe_state; /* pipe status info */ - int pipe_busy; /* busy flag, mostly to handle rundown sanely */ -#ifdef MAC - struct label *pipe_label; /* pipe MAC label - shared */ + struct pipemapping pipe_map; /* pipe mapping for direct I/O */ #endif - TAILQ_HEAD(,eventqelt) pipe_evlist; - lck_mtx_t *pipe_mtxp; /* shared mutex between both pipes */ + struct selinfo pipe_sel; /* for compat with select */ + pid_t pipe_pgid; /* information for async I/O */ + struct pipe *pipe_peer; /* link with other direction */ + u_int pipe_state; /* pipe status info */ + int pipe_busy; /* busy flag, mostly to handle rundown sanely */ + TAILQ_HEAD(, eventqelt) pipe_evlist; + lck_mtx_t *pipe_mtxp; /* shared mutex between both pipes */ + struct timespec st_atimespec; /* time of last access */ + struct timespec st_mtimespec; /* time of last data modification */ + struct timespec st_ctimespec; /* time of last status change */ + struct label *pipe_label; /* pipe MAC label - shared */ }; -#define PIPE_MTX(pipe) ((pipe)->pipe_mtxp) +#define PIPE_MTX(pipe) ((pipe)->pipe_mtxp) -#define PIPE_LOCK(pipe) lck_mtx_lock(PIPE_MTX(pipe)) -#define PIPE_UNLOCK(pipe) lck_mtx_unlock(PIPE_MTX(pipe)) -#define PIPE_LOCK_ASSERT(pipe, type) lck_mtx_assert(PIPE_MTX(pipe), (type)) +#define PIPE_LOCK(pipe) lck_mtx_lock(PIPE_MTX(pipe)) +#define PIPE_UNLOCK(pipe) lck_mtx_unlock(PIPE_MTX(pipe)) +#define PIPE_LOCK_ASSERT(pipe, type) LCK_MTX_ASSERT(PIPE_MTX(pipe), (type)) __BEGIN_DECLS -extern int pipe_stat(struct pipe *, struct stat *); +void pipeinit(void); +extern int pipe_stat(struct pipe *, void *, int); __END_DECLS -#endif /* KERNEL */ +#endif /* KERNEL */ #endif /* !_SYS_PIPE_H_ */