VOP_STRATEGY(9) BSD Kernel Developer's Manual VOP_STRATEGY(9)NAME
VOP_STRATEGY -- read or write a file system buffer
VOP_STRATEGY(struct vnode *vp, struct buf *bp);
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.
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
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
VOP_VPTOCNP(struct vnode *vp, struct vnode **dvp, char *buf, int *buflen);
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.
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.
Zero is returned on success, otherwise an error code is returned.
[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.
The function VOP_VPTOCNP appeared in FreeBSD 8.0.
This manual page was written by Joe Marcus Clarke.
BSD December 7, 2008 BSD
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