Annotation of prex/usr/server/fs/vfs/vfs.h, Revision 1.1
1.1 ! nbrk 1: /*
! 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 <prex/prex.h>
! 34: #include <sys/vnode.h>
! 35: #include <sys/file.h>
! 36: #include <sys/mount.h>
! 37: #include <sys/dirent.h>
! 38:
! 39: #include <assert.h>
! 40:
! 41: /*
! 42: * Tunable parameters
! 43: */
! 44: #define PRIO_FS 128 /* priority of file system server */
! 45: #define FSMAXNAMES 16 /* max length of 'file system' name */
! 46:
! 47: /* #define DEBUG_VFS 1 */
! 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:
! 57: #define DPRINTF(_m,X) if (vfs_debug & (_m)) dprintf X
! 58: #else
! 59: #define DPRINTF(_m, X)
! 60: #endif
! 61:
! 62: #ifdef DEBUG
! 63: #define ASSERT(e) assert(e)
! 64: #else
! 65: #define ASSERT(e)
! 66: #endif
! 67:
! 68: #if CONFIG_FS_THREADS > 1
! 69: #define malloc(s) malloc_r(s)
! 70: #define free(p) free_r(p)
! 71: #else
! 72: #define mutex_init(m) do {} while (0)
! 73: #define mutex_destroy(m) do {} while (0)
! 74: #define mutex_lock(m) do {} while (0)
! 75: #define mutex_unlock(m) do {} while (0)
! 76: #define mutex_trylock(m) do {} while (0)
! 77: #endif
! 78:
! 79: /*
! 80: * per task data
! 81: */
! 82: struct task {
! 83: struct list link; /* hash link */
! 84: task_t task; /* task id */
! 85: char cwd[PATH_MAX]; /* current working directory */
! 86: file_t cwdfp; /* directory for cwd */
! 87: file_t file[OPEN_MAX]; /* array of file pointers */
! 88: int nopens; /* number of opening files */
! 89: mutex_t lock; /* lock for this task */
! 90: cap_t cap; /* task capabilities */
! 91: };
! 92:
! 93: extern const struct vfssw vfssw_table[];
! 94:
! 95: extern struct task *task_lookup(task_t task);
! 96: extern int task_alloc(task_t task, struct task **pt);
! 97: extern void task_free(struct task *t);
! 98: extern void task_update(struct task *t, task_t task);
! 99: extern void task_unlock(struct task *t);
! 100: extern file_t task_getfp(struct task *t, int fd);
! 101: extern int task_newfd(struct task *t);
! 102: extern int task_conv(struct task *t, char *path, char *full);
! 103: extern void task_dump(void);
! 104: extern void task_init(void);
! 105:
! 106: extern int namei(char *path, vnode_t *vpp);
! 107: extern int lookup(char *path, vnode_t *vpp, char **name);
! 108:
! 109: extern void vnode_init(void);
! 110: #ifdef DEBUG
! 111: extern void vnode_dump(void);
! 112: #endif
! 113:
! 114: extern int sys_mount(char *dev, char *dir, char *fsname, int flags, void *data);
! 115: extern int sys_umount(char *path);
! 116: extern int sys_sync(void);
! 117: extern int vfs_findroot(char *path, mount_t *mp, char **root);
! 118: extern void vfs_busy(mount_t mp);
! 119: extern void vfs_unbusy(mount_t mp);
! 120: #ifdef DEBUG
! 121: extern void mount_dump(void);
! 122: #endif
! 123:
! 124: extern int sys_open(char *path, int flags, mode_t mode, file_t *pfp);
! 125: extern int sys_close(file_t fp);
! 126: extern int sys_read(file_t fp, void *buf, size_t size, size_t *result);
! 127: extern int sys_write(file_t fp, void *buf, size_t size, size_t *result);
! 128: extern int sys_lseek(file_t fp, off_t off, int type, off_t * cur_off);
! 129: extern int sys_ioctl(file_t fp, u_long request, void *buf);
! 130: extern int sys_fstat(file_t fp, struct stat *st);
! 131: extern int sys_fsync(file_t fp);
! 132:
! 133: extern int sys_opendir(char *path, file_t * file);
! 134: extern int sys_closedir(file_t fp);
! 135: extern int sys_readdir(file_t fp, struct dirent *dirent);
! 136: extern int sys_rewinddir(file_t fp);
! 137: extern int sys_seekdir(file_t fp, long loc);
! 138: extern int sys_telldir(file_t fp, long *loc);
! 139: extern int sys_mkdir(char *path, mode_t mode);
! 140: extern int sys_rmdir(char *path);
! 141: extern int sys_mknod(char *path, mode_t mode);
! 142: extern int sys_rename(char *src, char *dest);
! 143: extern int sys_unlink(char *path);
! 144: extern int sys_access(char *path, int mode);
! 145: extern int sys_stat(char *path, struct stat *st);
! 146:
! 147: #endif /* !_VFS_H */
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