From 380454126f1357db9270f9d1ca05dfe1a6e4ad47 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 15 Dec 2009 17:36:57 -0500 Subject: [PATCH] NFSv4: Fix a regression in the NFSv4 state manager Commit 5601a00d671fe89f9b087513244abcd08ad67e7d (nfs: run state manager in privileged mode) introduces a regression in the NFSv4 code when compiled with CONFIG_NFS_V4_1. The calls to nfs4_end_drain_session() from the main loop in nfs4_state_manager() Oops due to the lack of an NFSv4.1 session when running NFSv4.0. The fix is to move those two calls back into nfs41_init_clientid() and nfs4_reset_session(). The calls to nfs4_end_drain_session() that remain inside nfs4_state_manager() are safe, since the NFSv4.0 code will never set the NFS4CLNT_SESSION_DRAINING bit. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4state.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 18e8b26878c..6d263ed79e9 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -176,6 +176,7 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { int status; + nfs4_begin_drain_session(clp); status = nfs4_proc_exchange_id(clp, cred); if (status != 0) goto out; @@ -1274,6 +1275,7 @@ static int nfs4_reset_session(struct nfs_client *clp) { int status; + nfs4_begin_drain_session(clp); status = nfs4_proc_destroy_session(clp->cl_session); if (status && status != -NFS4ERR_BADSESSION && status != -NFS4ERR_DEADSESSION) { @@ -1299,7 +1301,6 @@ out: #else /* CONFIG_NFS_V4_1 */ static int nfs4_reset_session(struct nfs_client *clp) { return 0; } -static int nfs4_begin_drain_session(struct nfs_client *clp) { return 0; } static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } #endif /* CONFIG_NFS_V4_1 */ @@ -1332,7 +1333,6 @@ static void nfs4_state_manager(struct nfs_client *clp) for(;;) { if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { /* We're going to have to re-establish a clientid */ - nfs4_begin_drain_session(clp); status = nfs4_reclaim_lease(clp); if (status) { nfs4_set_lease_expired(clp, status); @@ -1359,7 +1359,6 @@ static void nfs4_state_manager(struct nfs_client *clp) /* Initialize or reset the session */ if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) && nfs4_has_session(clp)) { - nfs4_begin_drain_session(clp); status = nfs4_reset_session(clp); if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) continue;