rbd: define dup_token()

        return len;

}

/*

 * Finds the next token in *buf, dynamically allocates a buffer big

 * enough to hold a copy of it, and copies the token into the new

 * buffer.  The copy is guaranteed to be terminated with '\0'.  Note

 * that a duplicate buffer is created even for a zero-length token.

 *

 * Returns a pointer to the newly-allocated duplicate, or a null

 * pointer if memory for the duplicate was not available.  If

 * the lenp argument is a non-null pointer, the length of the token

 * (not including the '\0') is returned in *lenp.

 *

 * If successful, the *buf pointer will be updated to point beyond

 * the end of the found token.

 *

 * Note: uses GFP_KERNEL for allocation.

 */

static inline char *dup_token(const char **buf, size_t *lenp)

{

	char *dup;

	size_t len;

	len = next_token(buf);

	dup = kmalloc(len + 1, GFP_KERNEL);

	if (!dup)

		return NULL;

	memcpy(dup, *buf, len);

	*(dup + len) = '\0';

	*buf += len;

	if (lenp)

		*lenp = len;

	return dup;

}

/*

 * This fills in the pool_name, obj, obj_len, snap_name, obj_len,

 * rbd_dev, rbd_md_name, and name fields of the given rbd_dev, based