NFSv4: Add lease_time and lease_expired to 'nfs4:' line of mountstats (1a7441b2) · Commits · 戴 / test

On the NFS client there is no low-impact way to determine the nfs4 lease time or whether the lease is expired, so add these to mountstats with times displayed in seconds. If the lease is not expired, display lease_expired=0. Otherwise, display lease_expired=seconds_since_expired, similar to 'age:' line in mountstats. Signed-off-by:

Dave Wysochanski <dwysocha@redhat.com> Signed-off-by:

Trond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/super.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -742,6 +742,16 @@ int nfs_show_options(struct seq_file m, struct dentry root)
		EXPORT_SYMBOL_GPL(nfs_show_options);

		#if IS_ENABLED(CONFIG_NFS_V4)
		static void show_lease(struct seq_file m, struct nfs_server server)
		{
		struct nfs_client *clp = server->nfs_client;
		unsigned long expire;

		seq_printf(m, ",lease_time=%ld", clp->cl_lease_time / HZ);
		expire = clp->cl_last_renewal + clp->cl_lease_time;
		seq_printf(m, ",lease_expired=%ld",
		time_after(expire, jiffies) ? 0 : (jiffies - expire) / HZ);
		}
		#ifdef CONFIG_NFS_V4_1
		static void show_sessions(struct seq_file m, struct nfs_server server)
		{
		@@ -850,6 +860,7 @@ int nfs_show_stats(struct seq_file m, struct dentry root)
		seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
		show_sessions(m, nfss);
		show_pnfs(m, nfss);
		show_lease(m, nfss);
		}
		#endif

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