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

NAME

     VOP_STRATEGY - read or write a file system buffer

SYNOPSIS

     #include <sys/param.h>
     #include <sys/buf.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_iocmd.

     The call may block.

RETURN VALUES

     Always zero.  Errors should be signalled by setting the BIO_ERROR bit in
     bp->b_ioflags and setting bp->b_error to the appropriate errno value.

SEE ALSO

     errno(2), buf(9), vnode(9)

AUTHORS

     This manual page was written by Doug Rabson.

FreeBSD 15.1-STABLE-HBSD         June 30, 2022                 VOP_STRATEGY(9)