On Tue, Aug 19, 2014 at 02:38:27PM -0400, Jeff Layton wrote: > Allow a privileged userland process to end the v4 grace period early. > Any write to the file will cause the v4 grace period to be lifted. > The basic idea with this will be to allow the userland client tracking > program to lift the grace period once it knows that no more clients > will be reclaiming state. ... > +/** > + * write_v4_end_grace - release grace period for nfsd's v4.x lock manager > + * > + * Input: > + * buf: ignored > + * size: zero > + * OR > + * > + * Input: > + * buf: any value > + * size: non-zero length of C string in @buf > + * Output: > + * passed-in buffer filled with "Y" or "N" with a newline > + * and NULL-terminated C string. This indicates whether > + * the grace period has ended in the current net > + * namespace. Return code is the size in bytes of the > + * string. Writing to the file will end the grace period > + * for nfsd's v4 lock manager. > + */ > +static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) > +{ > + struct net *net = file->f_dentry->d_sb->s_fs_info; > + struct nfsd_net *nn = net_generic(net, nfsd_net_id); > + > + if (size > 0) > + nfsd4_end_grace(nn); Ditto for this one. Do we really need separate files for nlm and nfsd? I think the separate nlm and nfsd grace periods may just be a historical mistake. --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html