Index: head/sys/sys/file.h =================================================================== --- head/sys/sys/file.h (revision 89306) +++ head/sys/sys/file.h (revision 89307) @@ -1,272 +1,258 @@ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)file.h 8.3 (Berkeley) 1/9/95 * $FreeBSD$ */ #ifndef _SYS_FILE_H_ #define _SYS_FILE_H_ #ifndef _KERNEL #include #include #endif #ifdef _KERNEL #include #include #include #include #include struct stat; struct thread; struct uio; struct knote; struct vnode; struct socket; /* * Kernel descriptor table. * One entry for each open kernel vnode and socket. * * Below is the list of locks that protects members in struct file. * * (fl) filelist_lock * (f) f_mtx in struct file * none not locked */ struct file { LIST_ENTRY(file) f_list;/* (fl) list of active files */ short f_gcflag; /* used by thread doing fd garbage collection */ #define DTYPE_VNODE 1 /* file */ #define DTYPE_SOCKET 2 /* communications endpoint */ #define DTYPE_PIPE 3 /* pipe */ #define DTYPE_FIFO 4 /* fifo (named pipe) */ #define DTYPE_KQUEUE 5 /* event queue */ short f_type; /* descriptor type */ int f_count; /* (f) reference count */ int f_msgcount; /* (f) references from message queue */ struct ucred *f_cred; /* credentials associated with descriptor */ struct fileops { int (*fo_read) __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)); int (*fo_write) __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)); #define FOF_OFFSET 1 int (*fo_ioctl) __P((struct file *fp, u_long com, caddr_t data, struct thread *td)); int (*fo_poll) __P((struct file *fp, int events, struct ucred *cred, struct thread *td)); int (*fo_kqfilter) __P((struct file *fp, struct knote *kn)); int (*fo_stat) __P((struct file *fp, struct stat *sb, struct thread *td)); int (*fo_close) __P((struct file *fp, struct thread *td)); } *f_ops; int f_seqcount; /* * count of sequential accesses -- cleared * by most seek operations. */ off_t f_nextoff; /* * offset of next expected read or write */ off_t f_offset; caddr_t f_data; /* vnode or socket */ u_int f_flag; /* see fcntl.h */ struct mtx f_mtx; /* mutex to protect data */ }; #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_FILE); #endif LIST_HEAD(filelist, file); extern struct filelist filehead; /* (fl) head of list of open files */ extern struct fileops vnops; extern struct fileops badfileops; extern int maxfiles; /* kernel limit on number of open files */ extern int maxfilesperproc; /* per process limit on number of open files */ extern int nfiles; /* (fl) actual number of open files */ extern struct sx filelist_lock; /* sx to protect filelist and nfiles */ static __inline struct file * fhold __P((struct file *fp)); static __inline struct file * fhold_locked __P((struct file *fp)); int fget __P((struct thread *td, int fd, struct file **fpp)); int fget_read __P((struct thread *td, int fd, struct file **fpp)); int fget_write __P((struct thread *td, int fd, struct file **fpp)); int fdrop __P((struct file *fp, struct thread *td)); int fdrop_locked __P((struct file *fp, struct thread *td)); /* Lock a file. */ -/*#define FILE_LOCK_DEBUG*/ -#ifdef FILE_LOCK_DEBUG -#define FILE_LOCK(f) \ - do { \ - printf("FLCK: %p %s %d\n", &(f)->f_mtx, __FILE__, __LINE__); \ - mtx_lock(&(f)->f_mtx); \ - } while (0) -#define FILE_UNLOCK(f) \ - do { \ - printf("FREL: %p %s %d\n", &(f)->f_mtx, __FILE__, __LINE__); \ - mtx_unlock(&(f)->f_mtx); \ - } while (0) -#else #define FILE_LOCK(f) mtx_lock(&(f)->f_mtx) #define FILE_UNLOCK(f) mtx_unlock(&(f)->f_mtx) -#endif #define FILE_LOCKED(f) mtx_owned(&(f)->f_mtx) #define FILE_LOCK_ASSERT(f, type) mtx_assert(&(f)->f_mtx, (type)) int fgetvp __P((struct thread *td, int fd, struct vnode **vpp)); int fgetvp_read __P((struct thread *td, int fd, struct vnode **vpp)); int fgetvp_write __P((struct thread *td, int fd, struct vnode **vpp)); int fgetsock __P((struct thread *td, int fd, struct socket **spp, u_int *fflagp)); void fputsock __P((struct socket *sp)); static __inline struct file * fhold_locked(fp) struct file *fp; { #ifdef INVARIANTS FILE_LOCK_ASSERT(fp, MA_OWNED); #endif fp->f_count++; return (fp); } static __inline struct file * fhold(fp) struct file *fp; { FILE_LOCK(fp); fhold_locked(fp); FILE_UNLOCK(fp); return (fp); } static __inline int fo_read __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)); static __inline int fo_write __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)); static __inline int fo_ioctl __P((struct file *fp, u_long com, caddr_t data, struct thread *td)); static __inline int fo_poll __P((struct file *fp, int events, struct ucred *cred, struct thread *td)); static __inline int fo_stat __P((struct file *fp, struct stat *sb, struct thread *td)); static __inline int fo_close __P((struct file *fp, struct thread *td)); static __inline int fo_kqfilter __P((struct file *fp, struct knote *kn)); struct proc; struct file *ffind_hold(struct thread *, int fd); struct file *ffind_lock(struct thread *, int fd); static __inline int fo_read(fp, uio, cred, flags, td) struct file *fp; struct uio *uio; struct ucred *cred; struct thread *td; int flags; { return ((*fp->f_ops->fo_read)(fp, uio, cred, flags, td)); } static __inline int fo_write(fp, uio, cred, flags, td) struct file *fp; struct uio *uio; struct ucred *cred; struct thread *td; int flags; { return ((*fp->f_ops->fo_write)(fp, uio, cred, flags, td)); } static __inline int fo_ioctl(fp, com, data, td) struct file *fp; u_long com; caddr_t data; struct thread *td; { return ((*fp->f_ops->fo_ioctl)(fp, com, data, td)); } static __inline int fo_poll(fp, events, cred, td) struct file *fp; int events; struct ucred *cred; struct thread *td; { /* select(2) and poll(2) hold file descriptors. */ return ((*fp->f_ops->fo_poll)(fp, events, cred, td)); } static __inline int fo_stat(fp, sb, td) struct file *fp; struct stat *sb; struct thread *td; { return ((*fp->f_ops->fo_stat)(fp, sb, td)); } static __inline int fo_close(fp, td) struct file *fp; struct thread *td; { return ((*fp->f_ops->fo_close)(fp, td)); } static __inline int fo_kqfilter(fp, kn) struct file *fp; struct knote *kn; { return ((*fp->f_ops->fo_kqfilter)(fp, kn)); } #endif /* _KERNEL */ #endif /* !SYS_FILE_H */ Index: head/sys/sys/filedesc.h =================================================================== --- head/sys/sys/filedesc.h (revision 89306) +++ head/sys/sys/filedesc.h (revision 89307) @@ -1,175 +1,161 @@ /* * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)filedesc.h 8.1 (Berkeley) 6/2/93 * $FreeBSD$ */ #ifndef _SYS_FILEDESC_H_ #define _SYS_FILEDESC_H_ #include #include #include #include /* * This structure is used for the management of descriptors. It may be * shared by multiple processes. * * A process is initially started out with NDFILE descriptors stored within * this structure, selected to be enough for typical applications based on * the historical limit of 20 open files (and the usage of descriptors by * shells). If these descriptors are exhausted, a larger descriptor table * may be allocated, up to a process' resource limit; the internal arrays * are then unused. The initial expansion is set to NDEXTENT; each time * it runs out, it is doubled until the resource limit is reached. NDEXTENT * 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 20 #define NDEXTENT 50 /* 250 bytes in 256-byte alloc. */ struct filedesc { struct file **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 */ struct vnode *fd_jdir; /* jail 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 */ u_short fd_refcnt; /* reference count */ 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 */ struct mtx fd_mtx; /* mtx to protect the members of struct filedesc */ }; /* * Basic allocation of descriptors: * one of the above, plus arrays for NDFILE descriptors. */ struct filedesc0 { struct filedesc fd_fd; /* * These arrays are used when the number of open files is * <= NDFILE, and are then pointed to by the pointers above. */ struct file *fd_dfiles[NDFILE]; char fd_dfileflags[NDFILE]; }; /* * Per-process open flags. */ #define UF_EXCLOSE 0x01 /* auto-close on exec */ #if 0 #define UF_MAPPED 0x02 /* mapped from device */ #endif /* * Storage required per open file descriptor. */ #define OFILESIZE (sizeof(struct file *) + sizeof(char)) /* * This structure holds the information needed to send a SIGIO or * a SIGURG signal to a process or process group when new data arrives * on a device or socket. The structure is placed on an SLIST belonging * to the proc or pgrp so that the entire list may be revoked when the * process exits or the process group disappears. */ struct sigio { union { struct proc *siu_proc; /* process to receive SIGIO/SIGURG */ struct pgrp *siu_pgrp; /* process group to receive ... */ } sio_u; SLIST_ENTRY(sigio) sio_pgsigio; /* sigio's for process or group */ struct sigio **sio_myref; /* location of the pointer that holds * the reference to this structure */ struct ucred *sio_ucred; /* current credentials */ pid_t sio_pgid; /* pgid for signals */ }; #define sio_proc sio_u.siu_proc #define sio_pgrp sio_u.siu_pgrp SLIST_HEAD(sigiolst, sigio); #ifdef _KERNEL /* Lock a file descriptor table. */ -/*#define FILEDESC_LOCK_DEBUG*/ -#ifdef FILEDESC_LOCK_DEBUG -#define FILEDESC_LOCK(fd) \ - do { \ - printf("FD_LCK: %p %s %d\n", &(fd)->fd_mtx, __FILE__, __LINE__); \ - mtx_lock(&(fd)->fd_mtx); \ - } while (0) -#define FILEDESC_UNLOCK(fd) \ - do { \ - printf("FD_REL: %p %s %d\n", &(fd)->fd_mtx, __FILE__, __LINE__); \ - mtx_unlock(&(fd)->fd_mtx); \ - } while (0) -#else #define FILEDESC_LOCK(fd) mtx_lock(&(fd)->fd_mtx) #define FILEDESC_UNLOCK(fd) mtx_unlock(&(fd)->fd_mtx) -#endif #define FILEDESC_LOCKED(fd) mtx_owned(&(fd)->fd_mtx) #define FILEDESC_LOCK_ASSERT(fd, type) mtx_assert(&(fd)->fd_mtx, (type)) int closef __P((struct file *fp, struct thread *p)); int dupfdopen __P((struct thread *td, struct filedesc *fdp, int indx, int dfd, int mode, int error)); int falloc __P((struct thread *p, struct file **resultfp, int *resultfd)); int fdalloc __P((struct thread *p, int want, int *result)); int fdavail __P((struct thread *td, int n)); void fdcloseexec __P((struct thread *td)); struct filedesc *fdcopy __P((struct thread *td)); void fdfree __P((struct thread *td)); struct filedesc *fdinit __P((struct thread *td)); struct filedesc *fdshare __P((struct proc *p)); void ffree __P((struct file *fp)); pid_t fgetown __P((struct sigio *sigio)); int fsetown __P((pid_t pgid, struct sigio **sigiop)); void funsetown __P((struct sigio *sigio)); void funsetownlst __P((struct sigiolst *sigiolst)); struct file *holdfp __P((struct filedesc *fdp, int fd, int flag)); int getvnode __P((struct filedesc *fdp, int fd, struct file **fpp)); void setugidsafety __P((struct thread *td)); #endif /* _KERNEL */ #endif /* !_SYS_FILEDESC_H_ */