VATTR(9) Kernel Developer's Manual VATTR(9)
NAME
vattr, vattr_nullvnode attributes
SYNOPSIS
#include <sys/param.h>
#include <sys/vnode.h>
void
vattr_null(struct vattr *vap);
DESCRIPTION
Vnode attributes describe attributes of a file or directory including file permissions, owner, group, size, access time and modification time.
 
A vnode attribute has the following structure:
 
struct vattr { enum vtype va_type; /* vnode type (for create) */ mode_t va_mode; /* files access mode and type */ nlink_t va_nlink; /* number of references to file */ uid_t va_uid; /* owner user id */ gid_t va_gid; /* owner group id */ dev_t va_fsid; /* file system id (dev for now) */ ino_t va_fileid; /* file id */ u_quad_t va_size; /* file size in bytes */ long va_blocksize; /* blocksize preferred for i/o */ struct timespec va_atime; /* time of last access */ struct timespec va_mtime; /* time of last modification */ struct timespec va_ctime; /* time file changed */ struct timespec va_birthtime; /* time file created */ u_long va_gen; /* generation number of file */ u_long va_flags; /* flags defined for file */ dev_t va_rdev; /* device the special file represents */ u_quad_t va_bytes; /* bytes of disk space held by file */ u_quad_t va_filerev; /* file modification number */ u_int va_vaflags; /* operations flags, see below */ long va_spare; /* remain quad aligned */ };
 
A field value of VNOVAL represents a field whose value is unavailable or which is not to be changed. Valid flag values for va_flags are:
 
VA_UTIMES_NULL
utimes argument was NULL
VA_EXCLUSIVE
exclusive create request
 
Vnode attributes for a file are set by the vnode operation VOP_SETATTR(9). Vnode attributes for a file are retrieved by the vnode operation VOP_GETATTR(9). For more information on vnode operations see vnodeops(9).
FUNCTIONS
vattr_null(vap)
Set vnode attributes in vap to VNOVAL.
CODE REFERENCES
This section describes places within the NetBSD source tree where actual code implementing or using the vnode attributes can be found. All pathnames are relative to /usr/src.
 
vattr_null() is implemented in sys/kern/vfs_subr.c.
SEE ALSO