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authorDave Wysochanski <dwysocha@redhat.com>2019-05-17 17:06:41 -0400
committerTrond Myklebust <trond.myklebust@hammerspace.com>2019-07-06 14:54:52 -0400
commit1a7441b282cef3bb94acaba9f474ebc6d22277ba (patch)
tree18c8fda4b6b73d30b31a3797e1a94a0315f03409 /fs/nfs
parent2b17d725f9be59a1bfa0583af690c463fca1f385 (diff)
downloadlinux-stericsson-1a7441b282cef3bb94acaba9f474ebc6d22277ba.tar.gz
NFSv4: Add lease_time and lease_expired to 'nfs4:' line of mountstats
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>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/super.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index bd3ba1d323ea..d01def299d40 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -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