VOP_STRATEGY (9)

Leading comments

Copyright (c) 1996 Doug Rabson

All rights reserved.

This program is free software.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in...

(The comments found at the beginning of the groff file "man9/VOP_STRATEGY.9freebsd".)

NAME

VOP_STRATEGY - read or write a file system buffer

SYNOPSIS

In sys/param.h In sys/vnode.h Ft int Fn VOP_STRATEGY struct vnode *vp struct buf *bp

DESCRIPTION

The arguments are:

Fa vp

The vnode that the buffer is for.

Fa bp

The buffer to be read or written.

This call either reads or writes data from a file, depending on the value of Fa 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

vnode(9)

AUTHORS

This manual page was written by An Doug Rabson .