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root/usr/server/fs/vfs/vfs.h/* [<][>][^][v][top][bottom][index][help] */INCLUDED FROM1 /* 2 * Copyright (c) 2005-2007, Kohsuke Ohtani 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _VFS_H 31 #define _VFS_H 32 33 #include <sys/cdefs.h> 34 #include <sys/prex.h> 35 #include <sys/vnode.h> 36 #include <sys/file.h> 37 #include <sys/mount.h> 38 #include <sys/dirent.h> 39 40 #include <assert.h> 41 42 /* #define DEBUG_VFS 1 */ 43 44 /* 45 * Tunable parameters 46 */ 47 #define FSMAXNAMES 16 /* max length of 'file system' name */ 48 49 #ifdef DEBUG_VFS 50 extern int vfs_debug; 51 52 #define VFSDB_CORE 0x00000001 53 #define VFSDB_SYSCALL 0x00000002 54 #define VFSDB_VNODE 0x00000004 55 #define VFSDB_BIO 0x00000008 56 #define VFSDB_CAP 0x00000010 57 58 #define VFSDB_FLAGS 0x00000013 59 60 #define DPRINTF(_m,X) if (vfs_debug & (_m)) dprintf X 61 #define ASSERT(e) dassert(e) 62 #else 63 #define DPRINTF(_m, X) 64 #define ASSERT(e) 65 #endif 66 67 #if CONFIG_FS_THREADS > 1 68 #define malloc(s) malloc_r(s) 69 #define free(p) free_r(p) 70 #else 71 #define mutex_init(m) do {} while (0) 72 #define mutex_destroy(m) do {} while (0) 73 #define mutex_lock(m) do {} while (0) 74 #define mutex_unlock(m) do {} while (0) 75 #define mutex_trylock(m) do {} while (0) 76 #endif 77 78 /* 79 * per task data 80 */ 81 struct task { 82 struct list t_link; /* hash link */ 83 task_t t_taskid; /* task id */ 84 char t_cwd[PATH_MAX]; /* current working directory */ 85 file_t t_cwdfp; /* directory for cwd */ 86 file_t t_ofile[NOFILE]; /* pointers to file structures of open files */ 87 int t_nopens; /* number of opening files */ 88 mutex_t t_lock; /* lock for this task */ 89 }; 90 91 extern const struct vfssw vfssw[]; 92 93 __BEGIN_DECLS 94 int sys_open(char *path, int flags, mode_t mode, file_t *pfp); 95 int sys_close(file_t fp); 96 int sys_read(file_t fp, void *buf, size_t size, size_t *result); 97 int sys_write(file_t fp, void *buf, size_t size, size_t *result); 98 int sys_lseek(file_t fp, off_t off, int type, off_t * cur_off); 99 int sys_ioctl(file_t fp, u_long request, void *buf); 100 int sys_fstat(file_t fp, struct stat *st); 101 int sys_fsync(file_t fp); 102 int sys_ftruncate(file_t fp, off_t length); 103 104 int sys_opendir(char *path, file_t * file); 105 int sys_closedir(file_t fp); 106 int sys_readdir(file_t fp, struct dirent *dirent); 107 int sys_rewinddir(file_t fp); 108 int sys_seekdir(file_t fp, long loc); 109 int sys_telldir(file_t fp, long *loc); 110 int sys_fchdir(file_t fp, char *path); 111 112 int sys_mkdir(char *path, mode_t mode); 113 int sys_rmdir(char *path); 114 int sys_mknod(char *path, mode_t mode); 115 int sys_rename(char *src, char *dest); 116 int sys_unlink(char *path); 117 int sys_access(char *path, int mode); 118 int sys_stat(char *path, struct stat *st); 119 int sys_truncate(char *path, off_t length); 120 121 int sys_mount(char *dev, char *dir, char *fsname, int flags, void *data); 122 int sys_umount(char *path); 123 int sys_sync(void); 124 125 126 struct task *task_lookup(task_t task); 127 int task_alloc(task_t task, struct task **pt); 128 void task_free(struct task *t); 129 void task_setid(struct task *t, task_t task); 130 void task_unlock(struct task *t); 131 132 file_t task_getfp(struct task *t, int fd); 133 void task_setfp(struct task *t, int fd, file_t fp); 134 int task_newfd(struct task *t); 135 void task_delfd(struct task *t, int fd); 136 137 int task_conv(struct task *t, char *path, int mode, char *full); 138 void task_init(void); 139 140 int sec_file_permission(task_t task, char *path, int mode); 141 int sec_vnode_permission(char *path); 142 143 int namei(char *path, vnode_t *vpp); 144 int lookup(char *path, vnode_t *vpp, char **name); 145 void vnode_init(void); 146 147 int vfs_findroot(char *path, mount_t *mp, char **root); 148 void vfs_busy(mount_t mp); 149 void vfs_unbusy(mount_t mp); 150 151 int fs_noop(void); 152 153 #ifdef DEBUG_VFS 154 void task_dump(void); 155 void vnode_dump(void); 156 void mount_dump(void); 157 #endif 158 __END_DECLS 159 160 #endif /* !_VFS_H */ /* [<][>][^][v][top][bottom][index][help] */ | |||
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Copyright© 2005-2009 Kohsuke Ohtani |
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