PSEUDOCODE
int
vop_create(struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp
struct vattr *vap)
{
int mode = MAKEIMODE(vap->va_type, vap->va_mode);
struct vnode *vp;
int error;
*vpp = NULL;
if ((mode & IFMT) == 0)
mode |= IFREG;
error = SOMEFS_VALLOC(dvp, mode, cnp->cn_cred, &vp);
if (error)
return error;
/*
* Update the permissions for the new vnode, including
* copying the group from the directory.
*/
...;
#ifdef QUOTA
/*
* Possibly check quota information.
*/
...;
#endif
/*
* Enter new vnode in directory, taking care that the vnode
* hits the disk before the directory contents are changed.
*/
error = ...;
if (error)
goto bad;
*vpp = vp;
return 0;
bad:
/*
* Write error occurred trying to update the inode
* or the directory so must deallocate the inode.
*/
vput(vp);
/*
* Deallocate file system resources for vp.
*/
...;
return error;
}
ERRORS
