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vop_strategy(9) [osx man page]

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
vnode(9) AUTHORS
This manual page was written by Doug Rabson. BSD
July 24, 1996 BSD

Check Out this Related Man Page

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

NAME
VOP_VPTOCNP -- translate a vnode to its component name SYNOPSIS
#include <sys/param.h> #include <sys/vnode.h> int VOP_VPTOCNP(struct vnode *vp, struct vnode **dvp, char *buf, int *buflen); DESCRIPTION
This translates a vnode into its component name, and writes that name to the head of the buffer specified by buf vp The vnode to translate. dvp The vnode of the parent directory of vp. buf The buffer into which to preprend the component name. buflen The remaining size of the buffer. The default implementation of VOP_VPTOCNP scans through vp's parent directory looking for a dirent with a matching file number. If vp is not a directory, then VOP_VPTOCNP returns ENOENT. LOCKS
The vnode should be locked on entry and will still be locked on exit. The parent directory vnode will be unlocked on a successful exit. However, it will have its hold count incremented. RETURN VALUES
Zero is returned on success, otherwise an error code is returned. ERRORS
[ENOMEM] The buffer was not large enough to hold the vnode's component name. [ENOENT] The vnode was not found on the file system. SEE ALSO
VOP_LOOKUP(9), vnode(9) NOTES
This interface is a work in progress. HISTORY
The function VOP_VPTOCNP appeared in FreeBSD 8.0. AUTHORS
This manual page was written by Joe Marcus Clarke. BSD
December 7, 2008 BSD
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