|vp||The vnode of the file.|
|mode||The access mode required by the calling process.|
|cred||The callers credentials.|
|td||The thread which is accessing the file.|
|fp||The file being opened.|
Pointer to the file fp is useful for file systems which require such information, e.g., fdescfs(5). Use NULL as fp argument to VOP_OPEN for in-kernel opens.
The access mode is a set of flags, including FREAD, FWRITE, O_NONBLOCK, O_APPEND.
VOP_OPEN expects vp to be locked on entry and will leave it locked on return.
VOP_CLOSE expects at least a reference to be associated with the vnode and does not care whether the vnode is locked or not. The lock and reference state is left unchanged on return. Note that vn_close expects an unlocked, referenced vnode and will dereference the vnode prior to returning.
Zero is returned on success, otherwise an error code is returned.
This manual page was written by
.An Doug Rabson .