Пример #1
0
/*
 * Called for stat().
 * Set the type and the size (block devices only).
 * The link count for a device is always 1.
 */
static
int
dev_stat(struct vnode *v, struct stat *statbuf)
{
	struct device *d = v->vn_data;
	int result;

	bzero(statbuf, sizeof(struct stat));

	result = VOP_GETTYPE(v, &statbuf->st_mode);
	if (result) {
		return result;
	}

	statbuf->st_nlink = 1;
	statbuf->st_blocks = d->d_blocks;

	if (d->d_blocks > 0) {
		statbuf->st_size = d->d_blocks * d->d_blocksize;
	}
	else {
		statbuf->st_size = 0;
	}

	return 0;
}
Пример #2
0
/*
 * Called for stat().
 * Set the type and the size (block devices only).
 * The link count for a device is always 1.
 */
static
int
dev_stat(struct vnode *v, struct stat *statbuf)
{
	struct device *d = v->vn_data;
	int result;

	bzero(statbuf, sizeof(struct stat));

	if (d->d_blocks > 0) {
		statbuf->st_size = d->d_blocks * d->d_blocksize;
		statbuf->st_blksize = d->d_blocksize;
	}
	else {
		statbuf->st_size = 0;
	}

	result = VOP_GETTYPE(v, &statbuf->st_mode);
	if (result) {
		return result;
	}
	/* Make up some plausible default permissions. */
	statbuf->st_mode |= 0600;

	statbuf->st_nlink = 1;
	statbuf->st_blocks = d->d_blocks;

	/* The device number this device sits on (in OS/161, it doesn't) */
	statbuf->st_dev = 0;

	/* The device number this device *is* */
	statbuf->st_rdev = d->d_devnumber;

	return 0;
}
Пример #3
0
/*
 * Called for stat/fstat/lstat.
 */
static
int
sfs_stat(struct vnode *v, struct stat *statbuf)
{
	struct sfs_vnode *sv = v->vn_data;
	int result;

	/* Fill in the stat structure */
	bzero(statbuf, sizeof(struct stat));

	result = VOP_GETTYPE(v, &statbuf->st_mode);
	if (result) {
		return result;
	}

	statbuf->st_size = sv->sv_i.sfi_size;

	/* We don't support these yet; you get to implement them */
	statbuf->st_nlink = 0;
	statbuf->st_blocks = 0;

	/* Fill in other field as desired/possible... */

	return 0;
}
Пример #4
0
/*
 * Set current directory as a vnode.
 * The passed vnode must in fact be a directory.
 */
int
vfs_setcurdir(struct vnode *dir)
{
	struct vnode *old;
	mode_t vtype;
	int result;

	result = VOP_GETTYPE(dir, &vtype);
	if (result) {
		return result;
	}
	if (vtype != S_IFDIR) {
		return ENOTDIR;
	}

	VOP_INCREF(dir);

	spinlock_acquire(&curproc->p_lock);
	old = curproc->p_cwd;
	curproc->p_cwd = dir;
	spinlock_release(&curproc->p_lock);

	if (old!=NULL) {
		VOP_DECREF(old);
	}

	return 0;
}
Пример #5
0
/*
 * Called for stat/fstat/lstat.
 *
 * Locking: gets/releases vnode lock.
 *
 * Requires 1 buffer.
 */
static
int
sfs_stat(struct vnode *v, struct stat *statbuf)
{
	struct sfs_vnode *sv = v->vn_data;
	struct sfs_dinode *inodeptr;
	int result;

	/* Fill in the stat structure */
	bzero(statbuf, sizeof(struct stat));

	result = VOP_GETTYPE(v, &statbuf->st_mode);
	if (result) {
		return result;
	}

	lock_acquire(sv->sv_lock);

	reserve_buffers(SFS_BLOCKSIZE);

	result = sfs_dinode_load(sv);
	if (result) {
		unreserve_buffers(SFS_BLOCKSIZE);
		lock_release(sv->sv_lock);
		return result;
	}

	inodeptr = sfs_dinode_map(sv);

	statbuf->st_size = inodeptr->sfi_size;
	statbuf->st_nlink = inodeptr->sfi_linkcount;

	/* We don't support this yet */
	statbuf->st_blocks = 0;

	/* Fill in other fields as desired/possible... */

	sfs_dinode_unload(sv);
	unreserve_buffers(SFS_BLOCKSIZE);
	lock_release(sv->sv_lock);
	return 0;
}
Пример #6
0
/*
 * VOP_STAT
 */
static
int
emufs_stat(struct vnode *v, struct stat *statbuf)
{
	struct emufs_vnode *ev = v->vn_data;
	int result;

	bzero(statbuf, sizeof(struct stat));

	result = emu_getsize(ev->ev_emu, ev->ev_handle, &statbuf->st_size);
	if (result) {
		return result;
	}

	result = VOP_GETTYPE(v, &statbuf->st_mode);
	if (result) {
		return result;
	}
	statbuf->st_mode |= 0644; /* possibly a lie */
	statbuf->st_nlink = 1;    /* might be a lie, but doesn't matter much */
	statbuf->st_blocks = 0;   /* almost certainly a lie */

	return 0;
}