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| author | J. Bruce Fields <bfields@redhat.com> | 2010-10-13 01:55:25 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2010-10-21 16:11:56 +0200 |
| commit | 792c95dd519c54d6b0fd6401b3da7ea67b0d6b72 (patch) | |
| tree | 1bd872c92be9fcc8790e5c68d8acb2ababc0b241 /fs/nfsd | |
| parent | nfsd4: separate callback change and callback probe (diff) | |
| download | linux-792c95dd519c54d6b0fd6401b3da7ea67b0d6b72.tar.xz linux-792c95dd519c54d6b0fd6401b3da7ea67b0d6b72.zip | |
nfsd4: delay session removal till free_client
Have unhash_client_locked() remove client and associated sessions from
global hashes, but delay further dismantling till free_client().
(After unhash_client_locked(), the only remaining references outside the
destroying thread are from any connections which have xpt_user callbacks
registered.)
This will simplify locking on session destruction.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2327a8c00862..0f2643dac22a 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -883,6 +883,13 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name) static inline void free_client(struct nfs4_client *clp) { + while (!list_empty(&clp->cl_sessions)) { + struct nfsd4_session *ses; + ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, + se_perclnt); + list_del(&ses->se_perclnt); + nfsd4_put_session(ses); + } if (clp->cl_cred.cr_group_info) put_group_info(clp->cl_cred.cr_group_info); kfree(clp->cl_principal); @@ -909,15 +916,12 @@ release_session_client(struct nfsd4_session *session) static inline void unhash_client_locked(struct nfs4_client *clp) { + struct nfsd4_session *ses; + mark_client_expired(clp); list_del(&clp->cl_lru); - while (!list_empty(&clp->cl_sessions)) { - struct nfsd4_session *ses; - ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, - se_perclnt); - unhash_session(ses); - nfsd4_put_session(ses); - } + list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) + list_del_init(&ses->se_hash); } static void @@ -1031,6 +1035,8 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, if (clp == NULL) return NULL; + INIT_LIST_HEAD(&clp->cl_sessions); + princ = svc_gss_principal(rqstp); if (princ) { clp->cl_principal = kstrdup(princ, GFP_KERNEL); @@ -1047,7 +1053,6 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, INIT_LIST_HEAD(&clp->cl_strhash); INIT_LIST_HEAD(&clp->cl_openowners); INIT_LIST_HEAD(&clp->cl_delegations); - INIT_LIST_HEAD(&clp->cl_sessions); INIT_LIST_HEAD(&clp->cl_lru); spin_lock_init(&clp->cl_lock); INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |