freebsd man page for vop_strategy

VOP_STRATEGY(9) 					   BSD Kernel Developer's Manual					   VOP_STRATEGY(9)

NAME
     VOP_STRATEGY -- read or write a file system buffer

SYNOPSIS
     #include <sys/param.h>
     #include <sys/vnode.h>

     int
     VOP_STRATEGY(struct vnode *vp, struct buf *bp);

DESCRIPTION
     The arguments are:

     vp  The vnode that the buffer is for.

     bp  The buffer to be read or written.

     This call either reads or writes data from a file, depending on the value of bp->b_io.bio_cmd.

     The call may block.

RETURN VALUES
     Always zero.  Errors should be signalled by setting BIO_ERROR on b_ioflags field in struct buf, and setting b_error to the appropriate errno
     value.

SEE ALSO
     buf(9), vnode(9)

AUTHORS
     This manual page was written by Doug Rabson.

BSD
								 February 2, 2014							       BSD