1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 22 /* All Rights Reserved */ 23 24 25 /* 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #ifndef _SYS_FILE_H 31 #define _SYS_FILE_H 32 33 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 11.28 */ 34 35 #include <sys/t_lock.h> 36 #ifdef _KERNEL 37 #include <sys/model.h> 38 #include <sys/user.h> 39 #endif 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /* 46 * fio locking: 47 * f_rwlock protects f_vnode and f_cred 48 * f_tlock protects the rest 49 * 50 * The purpose of locking in this layer is to keep the kernel 51 * from panicing if, for example, a thread calls close() while 52 * another thread is doing a read(). It is up to higher levels 53 * to make sure 2 threads doing I/O to the same file don't 54 * screw each other up. 55 */ 56 /* 57 * One file structure is allocated for each open/creat/pipe call. 58 * Main use is to hold the read/write pointer associated with 59 * each open file. 60 */ 61 typedef struct file { 62 kmutex_t f_tlock; /* short term lock */ 63 ushort_t f_flag; 64 ushort_t f_pad; /* Explicit pad to 4 byte boundary */ 65 struct vnode *f_vnode; /* pointer to vnode structure */ 66 offset_t f_offset; /* read/write character pointer */ 67 struct cred *f_cred; /* credentials of user who opened it */ 68 struct f_audit_data *f_audit_data; /* file audit data */ 69 int f_count; /* reference count */ 70 } file_t; 71 72 /* 73 * fpollinfo struct - used by poll caching to track who has polled the fd 74 */ 75 typedef struct fpollinfo { 76 struct _kthread *fp_thread; /* thread caching poll info */ 77 struct fpollinfo *fp_next; 78 } fpollinfo_t; 79 80 /* flags */ 81 82 #define FOPEN 0xffffffff 83 #define FREAD 0x01 /* <sys/aiocb.h> LIO_READ must be identical */ 84 #define FWRITE 0x02 /* <sys/aiocb.h> LIO_WRITE must be identical */ 85 #define FNDELAY 0x04 86 #define FAPPEND 0x08 87 #define FSYNC 0x10 /* file (data+inode) integrity while writing */ 88 #ifdef C2_AUDIT 89 #define FREVOKED 0x20 /* C2 Security - Revoke Subsystem */ 90 #endif 91 #define FDSYNC 0x40 /* file data only integrity while writing */ 92 #define FRSYNC 0x8000 /* sync read operations at same level of */ 93 /* integrity as specified for writes by */ 94 /* FSYNC and FDSYNC flags */ 95 #define FOFFMAX 0x2000 /* large file */ 96 #define FNONBLOCK 0x80 97 98 #define FMASK 0xa0ff /* all flags that can be changed by F_SETFL */ 99 100 /* open-only modes */ 101 102 #define FCREAT 0x0100 103 #define FTRUNC 0x0200 104 #define FEXCL 0x0400 105 #define FNOCTTY 0x0800 106 #define FXATTR 0x4000 /* open as extended attribute */ 107 108 #define FASYNC 0x1000 /* asyncio in progress pseudo flag */ 109 #define FNODSYNC 0x10000 /* fsync pseudo flag */ 110 111 #define FNOFOLLOW 0x20000 /* don't follow symlinks */ 112 #define FNOLINKS 0x40000 /* don't allow multiple hard links */ 113 114 #ifdef _KERNEL 115 116 /* 117 * Fake flags for driver ioctl calls to inform them of the originating 118 * process' model. See <sys/model.h> 119 * 120 * Part of the Solaris 2.6+ DDI/DKI 121 */ 122 #define FMODELS DATAMODEL_MASK /* Note: 0x0ff00000 */ 123 #define FILP32 DATAMODEL_ILP32 124 #define FLP64 DATAMODEL_LP64 125 #define FNATIVE DATAMODEL_NATIVE 126 127 /* 128 * Large Files: The macro gets the offset maximum (refer to LFS API doc) 129 * corresponding to a file descriptor. We had the choice of storing 130 * this value in file descriptor. Right now we only have two 131 * offset maximums one if MAXOFF_T and other is MAXOFFSET_T. It is 132 * inefficient to store these two values in a separate member in 133 * file descriptor. To avoid wasting spaces we define this macro. 134 * The day there are more than two offset maximum we may want to 135 * rewrite this macro. 136 */ 137 138 #define OFFSET_MAX(fd) ((fd->f_flag & FOFFMAX) ? MAXOFFSET_T : MAXOFF32_T) 139 140 /* 141 * Fake flag => internal ioctl call for layered drivers. 142 * Note that this flag deliberately *won't* fit into 143 * the f_flag field of a file_t. 144 * 145 * Part of the Solaris 2.x DDI/DKI. 146 */ 147 #define FKIOCTL 0x80000000 /* ioctl addresses are from kernel */ 148 149 /* 150 * Fake flag => this time to specify that the open(9E) 151 * comes from another part of the kernel, not userland. 152 * 153 * Part of the Solaris 2.x DDI/DKI. 154 */ 155 #define FKLYR 0x40000000 /* layered driver call */ 156 157 #endif /* _KERNEL */ 158 159 /* miscellaneous defines */ 160 161 #ifndef L_SET 162 #define L_SET 0 /* for lseek */ 163 #endif /* L_SET */ 164 165 #if defined(_KERNEL) 166 167 /* 168 * Routines dealing with user per-open file flags and 169 * user open files. 170 */ 171 struct proc; /* forward reference for function prototype */ 172 struct vnodeops; 173 174 extern file_t *getf(int); 175 extern void releasef(int); 176 extern void areleasef(int, uf_info_t *); 177 #ifndef _BOOT 178 extern void closeall(uf_info_t *); 179 #endif 180 extern void flist_fork(uf_info_t *, uf_info_t *); 181 extern int closef(file_t *); 182 extern int closeandsetf(int, file_t *); 183 extern int ufalloc_file(int, file_t *); 184 extern int ufalloc(int); 185 extern int ufcanalloc(proc_t *, uint_t); 186 extern int falloc(struct vnode *, int, file_t **, int *); 187 extern void finit(void); 188 extern void unfalloc(file_t *); 189 extern void setf(int, file_t *); 190 extern int f_getfd_error(int, int *); 191 extern char f_getfd(int); 192 extern int f_setfd_error(int, int); 193 extern void f_setfd(int, char); 194 extern int f_getfl(int, int *); 195 extern int f_badfd(int, int *, int); 196 extern int fassign(struct vnode **, int, int *); 197 extern void fcnt_add(uf_info_t *, int); 198 extern void close_exec(uf_info_t *); 199 extern void clear_stale_fd(void); 200 extern void clear_active_fd(int); 201 extern void free_afd(afd_t *afd); 202 extern int fisopen(struct vnode *); 203 extern void delfpollinfo(int); 204 extern void addfpollinfo(int); 205 extern int sock_getfasync(struct vnode *); 206 extern int files_can_change_zones(void); 207 #ifdef DEBUG 208 /* The following functions are only used in ASSERT()s */ 209 extern void checkwfdlist(struct vnode *, fpollinfo_t *); 210 extern void checkfpollinfo(void); 211 extern int infpollinfo(int); 212 #endif /* DEBUG */ 213 214 #endif /* defined(_KERNEL) */ 215 216 #ifdef __cplusplus 217 } 218 #endif 219 220 #endif /* _SYS_FILE_H */ 221