[PATCH 02/32] NFSv4: Don't loop forever on state recovery failure...

Trond Myklebust
2009-08-19T23:41:01Z

If the server is broken, then retrying forever won't fix it. We
should just give up after a while, and return an error to the user.
We set the number of retries to 10 for now...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
fs/nfs/nfs4proc.c | 18 ++++++++++++------
1 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6917311..d95f7f9 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -61,6 +61,8 @@
#define NFS4_POLL_RETRY_MIN (HZ/10)
#define NFS4_POLL_RETRY_MAX (15*HZ)

+#define NFS4_MAX_LOOP_ON_RECOVER (10)
+
struct nfs4_opendata;
static int _nfs4_proc_open(struct nfs4_opendata *data);
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
@@ -426,17 +428,19 @@ out:
static int nfs4_recover_session(struct nfs4_session *session)
{
struct nfs_client *clp = session->clp;
+ unsigned int loop;
int ret;

- for (;;) {
+ for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
ret = nfs4_wait_clnt_recover(clp);
if (ret != 0)
- return ret;
+ break;
if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
break;
nfs4_schedule_state_manager(clp);
+ ret = -EIO;
}
- return 0;
+ return ret;
}

static int nfs41_setup_sequence(struct nfs4_session *session,
@@ -1444,18 +1448,20 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
static int nfs4_recover_expired_lease(struct nfs_server *server)
{
struct nfs_client *clp = server->nfs_client;
+ unsigned int loop;
int ret;

- for (;;) {
+ for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
ret = nfs4_wait_clnt_recover(clp);
if (ret != 0)
- return ret;
+ break;
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
!test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
break;
nfs4_schedule_state_recovery(clp);
+ ret = -EIO;
}
- return 0;
+ return ret;
}

/*
--
1.6.0.4