bsd/sys/buf.h

174  @discussion Buffers allocated with buf_alloc() are not returned with a upl, and
184  @discussion This function should only be called on iobufs, i.e. buffers allocated with buf_alloc().
322  Otherwise, the buffer was created with buf_alloc() and buf_setupl() was subsequently called; buf_map()
339  underlying buffer will tear down the mapping. Otherwise, the buffer was created with buf_alloc() and
464  code which is manually providing storage for an iobuf, one allocated with buf_alloc().
485  useful with iobufs (allocated with buf_alloc()).
526  buf_getblk() was passed a device vnode.  It is set on an iobuf if buf_alloc() is passed a device
537  It is also set on an iobuf if buf_alloc() is passed a device vnode.
610  @discussion buf_setupl() should only be called on buffers allocated with buf_alloc().
619  @return 0 for success, EINVAL if the buffer was not allocated with buf_alloc().
628  have been allocated with buf_alloc().  Checks its arguments to make sure
669  @function buf_alloc
671  @discussion A buffer returned by buf_alloc() is marked as busy and as an iobuf; it has no storage set up and must be
677 buf_t 	buf_alloc(vnode_t);
681  @abstract Free a buffer that was allocated with buf_alloc().
765  with buf_alloc()).
791  with buf_alloc(), there are no such guarantees; you must take care of your own flushing to disk.  If