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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2009-08-24 19:21:29 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-08-24 16:28:42 -0700 |
| commit | 7111dc73923e9737b38a3ef5b5f236109000ff28 (patch) | |
| tree | a21d3fbdf710b8a5ecfede32b822368fea2cad40 /fs/nfs | |
| parent | 2584e7986f235572d4b03bbe52fd1e85c1679b8e (diff) | |
| download | lwn-7111dc73923e9737b38a3ef5b5f236109000ff28.tar.gz lwn-7111dc73923e9737b38a3ef5b5f236109000ff28.zip | |
NFSv4: Fix an infinite looping problem with the nfs4_state_manager
Commit 76db6d9500caeaa774a3e32a997eba30bbdc176b (nfs41: add session setup
to the state manager) introduces an infinite loop possibility in the NFSv4
state manager. By first checking nfs4_has_session() before clearing the
NFS4CLNT_SESSION_SETUP flag, it allows for a situation where someone sets
that flag, but it never gets cleared, and so the state manager loops.
In fact commit c3fad1b1aaf850bf692642642ace7cd0d64af0a3 (nfs41: add session
reset to state manager) causes this to happen every time we get a network
partition error.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4state.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 65ca8c18476f..1434080aefeb 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1250,8 +1250,8 @@ static void nfs4_state_manager(struct nfs_client *clp) continue; } /* Initialize or reset the session */ - if (nfs4_has_session(clp) && - test_and_clear_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) { + if (test_and_clear_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state) + && nfs4_has_session(clp)) { if (clp->cl_cons_state == NFS_CS_SESSION_INITING) status = nfs4_initialize_session(clp); else |