root / prex-0.9.0 / usr / server / fs / vfs / vfs.h @ 03e9c04a
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/*
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* Copyright (c) 2005-2007, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _VFS_H
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#define _VFS_H
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#include <sys/cdefs.h> |
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#include <sys/prex.h> |
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#include <sys/vnode.h> |
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#include <sys/file.h> |
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#include <sys/mount.h> |
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#include <sys/dirent.h> |
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#include <assert.h> |
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/* #define DEBUG_VFS 1 */
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/*
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* Tunable parameters
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*/
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#define FSMAXNAMES 16 /* max length of 'file system' name */ |
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#ifdef DEBUG_VFS
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extern int vfs_debug; |
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#define VFSDB_CORE 0x00000001 |
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#define VFSDB_SYSCALL 0x00000002 |
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#define VFSDB_VNODE 0x00000004 |
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#define VFSDB_BIO 0x00000008 |
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#define VFSDB_CAP 0x00000010 |
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#define VFSDB_FLAGS 0x00000013 |
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#define DPRINTF(_m,X) if (vfs_debug & (_m)) dprintf X |
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#define ASSERT(e) dassert(e)
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#else
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#define DPRINTF(_m, X)
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#define ASSERT(e)
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#endif
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#if CONFIG_FS_THREADS > 1 |
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#define malloc(s) malloc_r(s)
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#define free(p) free_r(p)
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#else
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#define mutex_init(m) do {} while (0) |
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#define mutex_destroy(m) do {} while (0) |
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#define mutex_lock(m) do {} while (0) |
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#define mutex_unlock(m) do {} while (0) |
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#define mutex_trylock(m) do {} while (0) |
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#endif
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/*
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* per task data
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*/
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struct task {
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struct list t_link; /* hash link */ |
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task_t t_taskid; /* task id */
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char t_cwd[PATH_MAX]; /* current working directory */ |
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file_t t_cwdfp; /* directory for cwd */
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file_t t_ofile[NOFILE]; /* pointers to file structures of open files */
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int t_nopens; /* number of opening files */ |
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mutex_t t_lock; /* lock for this task */
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}; |
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extern const struct vfssw vfssw[]; |
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__BEGIN_DECLS |
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int sys_open(char *path, int flags, mode_t mode, file_t *pfp); |
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int sys_close(file_t fp);
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int sys_read(file_t fp, void *buf, size_t size, size_t *result); |
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int sys_write(file_t fp, void *buf, size_t size, size_t *result); |
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int sys_lseek(file_t fp, off_t off, int type, off_t * cur_off); |
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int sys_ioctl(file_t fp, u_long request, void *buf); |
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int sys_fstat(file_t fp, struct stat *st); |
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int sys_fsync(file_t fp);
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int sys_ftruncate(file_t fp, off_t length);
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int sys_opendir(char *path, file_t * file); |
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int sys_closedir(file_t fp);
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int sys_readdir(file_t fp, struct dirent *dirent); |
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int sys_rewinddir(file_t fp);
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int sys_seekdir(file_t fp, long loc); |
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int sys_telldir(file_t fp, long *loc); |
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int sys_fchdir(file_t fp, char *path); |
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int sys_mkdir(char *path, mode_t mode); |
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int sys_rmdir(char *path); |
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int sys_mknod(char *path, mode_t mode); |
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int sys_rename(char *src, char *dest); |
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int sys_unlink(char *path); |
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int sys_access(char *path, int mode); |
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int sys_stat(char *path, struct stat *st); |
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int sys_truncate(char *path, off_t length); |
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int sys_mount(char *dev, char *dir, char *fsname, int flags, void *data); |
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int sys_umount(char *path); |
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int sys_sync(void); |
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struct task *task_lookup(task_t task);
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int task_alloc(task_t task, struct task **pt); |
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void task_free(struct task *t); |
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void task_setid(struct task *t, task_t task); |
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void task_unlock(struct task *t); |
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file_t task_getfp(struct task *t, int fd); |
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void task_setfp(struct task *t, int fd, file_t fp); |
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int task_newfd(struct task *t); |
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void task_delfd(struct task *t, int fd); |
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int task_conv(struct task *t, char *path, int mode, char *full); |
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void task_init(void); |
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int sec_file_permission(task_t task, char *path, int mode); |
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int sec_vnode_permission(char *path); |
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int namei(char *path, vnode_t *vpp); |
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int lookup(char *path, vnode_t *vpp, char **name); |
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void vnode_init(void); |
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int vfs_findroot(char *path, mount_t *mp, char **root); |
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void vfs_busy(mount_t mp);
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void vfs_unbusy(mount_t mp);
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int fs_noop(void); |
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#ifdef DEBUG_VFS
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void task_dump(void); |
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void vnode_dump(void); |
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void mount_dump(void); |
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#endif
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__END_DECLS |
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#endif /* !_VFS_H */ |