X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..0a7de7458d150b5d4dffc935ba399be265ef0a1a:/bsd/sys/filedesc.h?ds=sidebyside diff --git a/bsd/sys/filedesc.h b/bsd/sys/filedesc.h index 5b0b65ef0..80d91f2e4 100644 --- a/bsd/sys/filedesc.h +++ b/bsd/sys/filedesc.h @@ -1,15 +1,20 @@ /* - * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2012 Apple Computer, Inc. All rights reserved. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * @APPLE_LICENSE_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. 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, @@ -17,8 +22,8 @@ * 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, 1997 Apple Computer, Inc. All Rights Reserved */ /* @@ -57,11 +62,10 @@ */ #ifndef _SYS_FILEDESC_H_ -#define _SYS_FILEDESC_H_ +#define _SYS_FILEDESC_H_ #include -#ifdef __APPLE_API_UNSTABLE /* * This structure is used for the management of descriptors. It may be * shared by multiple processes. @@ -76,42 +80,63 @@ * should be selected to be the biggest multiple of OFILESIZE (see below) * that will fit in a power-of-two sized piece of memory. */ -#define NDFILE 25 /* 125 bytes */ -#define NDEXTENT 50 /* 250 bytes in 256-byte alloc. */ +#define NDFILE 25 /* 125 bytes */ +#define NDEXTENT 50 /* 250 bytes in 256-byte alloc. */ + +#ifdef BSD_KERNEL_PRIVATE + +#include struct klist; +struct kqlist; struct filedesc { - struct fileproc **fd_ofiles; /* file structures for open files */ - char *fd_ofileflags; /* per-process open file flags */ - struct vnode *fd_cdir; /* current directory */ - struct vnode *fd_rdir; /* root directory */ - int fd_nfiles; /* number of open files allocated */ - u_short fd_lastfile; /* high-water mark of fd_ofiles */ - u_short fd_freefile; /* approx. next free file */ - u_short fd_cmask; /* mask for file creation */ - u_short fd_refcnt; /* reference count */ - + struct fileproc **fd_ofiles; /* file structures for open files */ + lck_mtx_t fd_kqhashlock; /* lock for dynamic kqueue hash */ + u_long fd_kqhashmask; /* size of dynamic kqueue hash */ + struct kqlist *fd_kqhash; /* hash table for dynamic kqueues */ + struct kqueue *fd_wqkqueue; /* the workq kqueue */ + char *fd_ofileflags; /* per-process open file flags */ + struct vnode *fd_cdir; /* current directory */ + struct vnode *fd_rdir; /* root directory */ + int fd_nfiles; /* number of open files allocated */ + int fd_lastfile; /* high-water mark of fd_ofiles */ + int fd_freefile; /* approx. next free file */ + u_short fd_cmask; /* mask for file creation */ + int fd_flags; int fd_knlistsize; /* size of knlist */ struct klist *fd_knlist; /* list of attached knotes */ u_long fd_knhashmask; /* size of knhash */ struct klist *fd_knhash; /* hash table for attached knotes */ - int fd_flags; + lck_mtx_t fd_knhashlock; /* lock for hash table for attached knotes */ }; /* * definitions for fd_flags; */ -#define FD_CHROOT 0x01 /* process was chrooted... keep track even */ +#define FD_CHROOT 0x01 /* process was chrooted... keep track even */ /* if we're force unmounted and unable to */ /* take a vnode_ref on fd_rdir during a fork */ +#define FD_WORKLOOP 0x02 /* process has created a kqworkloop that */ + /* requires manual cleanup on exit */ + /* * Per-process open flags. */ -#define UF_EXCLOSE 0x01 /* auto-close on exec */ -#define UF_RESERVED 0x04 /* open pending / in progress */ -#define UF_CLOSING 0x08 /* close in progress */ +#define UF_EXCLOSE 0x01 /* auto-close on exec */ +#define UF_FORKCLOSE 0x02 /* auto-close on fork */ +#define UF_RESERVED 0x04 /* open pending / in progress */ +#define UF_CLOSING 0x08 /* close in progress */ + +#ifdef KERNEL +#define UF_RESVWAIT 0x10 /* close in progress */ +#define UF_INHERIT 0x20 /* "inherit-on-exec" */ + +#define UF_VALID_FLAGS \ + (UF_EXCLOSE | UF_FORKCLOSE | UF_RESERVED | UF_CLOSING |\ + UF_RESVWAIT | UF_INHERIT) +#endif /* KERNEL */ /* * Storage required per open file descriptor. @@ -122,27 +147,40 @@ struct filedesc { /* * Kernel global variables and routines. */ -extern int dupfdopen(struct filedesc *fdp, - int indx, int dfd, int mode, int error); -extern int fdalloc(struct proc *p, int want, int *result); -extern void fdrelse(struct proc *p, int fd); -extern int fdavail(struct proc *p, int n); -#define fdfile(p, fd) \ - (&(p)->p_fd->fd_ofiles[(fd)]) -#define fdflags(p, fd) \ - (&(p)->p_fd->fd_ofileflags[(fd)]) -extern int falloc(struct proc *p, - struct fileproc **resultfp, int *resultfd); -extern void ffree(struct file *fp); +extern int dupfdopen(struct filedesc *fdp, + int indx, int dfd, int mode, int error); +extern int fdalloc(proc_t p, int want, int *result); +extern void fdrelse(proc_t p, int fd); +extern int fdavail(proc_t p, int n); +#define fdfile(p, fd) \ + (&(p)->p_fd->fd_ofiles[(fd)]) +#define fdflags(p, fd) \ + (&(p)->p_fd->fd_ofileflags[(fd)]) + +/* + * Accesor macros for fd flags + */ +#define FDFLAGS_GET(p, fd) (*fdflags(p, fd) & (UF_EXCLOSE|UF_FORKCLOSE)) +#define FDFLAGS_SET(p, fd, bits) \ + (*fdflags(p, fd) |= ((bits) & (UF_EXCLOSE|UF_FORKCLOSE))) +#define FDFLAGS_CLR(p, fd, bits) \ + (*fdflags(p, fd) &= ~((bits) & (UF_EXCLOSE|UF_FORKCLOSE))) + +extern int falloc(proc_t p, struct fileproc **resultfp, int *resultfd, vfs_context_t ctx); #ifdef __APPLE_API_PRIVATE -extern struct filedesc *fdcopy(struct proc *p); -extern void fdfree(struct proc *p); -extern void fdexec(struct proc *p); +typedef struct fileproc *(*fp_allocfn_t)(void *); +extern int falloc_withalloc(proc_t p, struct fileproc **resultfp, + int *resultfd, vfs_context_t ctx, + fp_allocfn_t fp_zalloc, void *crarg); + +extern struct filedesc *fdcopy(proc_t p, struct vnode *uth_cdir); +extern void fdfree(proc_t p); +extern void fdexec(proc_t p, short flags, int self_exec); #endif /* __APPLE_API_PRIVATE */ #endif /* KERNEL */ -#endif /* __APPLE_API_UNSTABLE */ +#endif /* BSD_KERNEL_PRIVATE */ #endif /* !_SYS_FILEDESC_H_ */