diff options
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 26 | ||||
| -rw-r--r-- | fs/nfsd/nfs4state.c | 8 | ||||
| -rw-r--r-- | fs/nfsd/state.h | 5 |
3 files changed, 22 insertions, 17 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 18b740b..d32f49d 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -470,8 +470,6 @@ static int max_cb_time(void) return max(nfsd4_lease/10, (time_t)1) * HZ; } -/* Reference counting, callback cleanup, etc., all look racy as heck. - * And why is cl_cb_set an atomic? */ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_session *ses) { @@ -526,14 +524,20 @@ static void warn_no_callback_path(struct nfs4_client *clp, int reason) (int)clp->cl_name.len, clp->cl_name.data, reason); } +static void nfsd4_mark_cb_down(struct nfs4_client *clp, int reason) +{ + clp->cl_cb_state = NFSD4_CB_DOWN; + warn_no_callback_path(clp, reason); +} + static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata) { struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null); if (task->tk_status) - warn_no_callback_path(clp, task->tk_status); + nfsd4_mark_cb_down(clp, task->tk_status); else - atomic_set(&clp->cl_cb_set, 1); + clp->cl_cb_state = NFSD4_CB_UP; } static const struct rpc_call_ops nfsd4_cb_probe_ops = { @@ -579,14 +583,15 @@ static void do_probe_callback(struct nfs4_client *clp) */ void nfsd4_probe_callback(struct nfs4_client *clp) { + /* XXX: atomicity? Also, should we be using cl_cb_flags? */ + clp->cl_cb_state = NFSD4_CB_UNKNOWN; set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags); do_probe_callback(clp); } void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn) { - BUG_ON(atomic_read(&clp->cl_cb_set)); - + clp->cl_cb_state = NFSD4_CB_UNKNOWN; spin_lock(&clp->cl_lock); memcpy(&clp->cl_cb_conn, conn, sizeof(struct nfs4_cb_conn)); spin_unlock(&clp->cl_lock); @@ -693,8 +698,7 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) break; default: /* Network partition? */ - atomic_set(&clp->cl_cb_set, 0); - warn_no_callback_path(clp, task->tk_status); + nfsd4_mark_cb_down(clp, task->tk_status); if (current_rpc_client != task->tk_client) { /* queue a callback on the new connection: */ atomic_inc(&dp->dl_count); @@ -707,10 +711,8 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) task->tk_status = 0; rpc_restart_call_prepare(task); return; - } else { - atomic_set(&clp->cl_cb_set, 0); - warn_no_callback_path(clp, task->tk_status); - } + } else + nfsd4_mark_cb_down(clp, task->tk_status); } static void nfsd4_cb_recall_release(void *calldata) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 290370b..919ad25 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1071,7 +1071,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); atomic_set(&clp->cl_refcount, 0); - atomic_set(&clp->cl_cb_set, 0); + clp->cl_cb_state = NFSD4_CB_UNKNOWN; INIT_LIST_HEAD(&clp->cl_idhash); INIT_LIST_HEAD(&clp->cl_strhash); INIT_LIST_HEAD(&clp->cl_openowners); @@ -2003,7 +2003,6 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) status = nfserr_clid_inuse; else { - atomic_set(&conf->cl_cb_set, 0); nfsd4_change_callback(conf, &unconf->cl_cb_conn); nfsd4_probe_callback(conf); expire_client(unconf); @@ -2633,7 +2632,8 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta { struct nfs4_delegation *dp; struct nfs4_stateowner *sop = stp->st_stateowner; - int cb_up = atomic_read(&sop->so_client->cl_cb_set); + /* XXX: or unknown and nfsv4.1: */ + int cb_up = (sop->so_client->cl_cb_state == NFSD4_CB_UP); struct file_lock *fl; int status, flag = 0; @@ -2823,7 +2823,7 @@ nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, renew_client(clp); status = nfserr_cb_path_down; if (!list_empty(&clp->cl_delegations) - && !atomic_read(&clp->cl_cb_set)) + && clp->cl_cb_state != NFSD4_CB_UP) goto out; status = nfs_ok; out: diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 442f6d8..32ff615 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -242,7 +242,10 @@ struct nfs4_client { unsigned long cl_cb_flags; struct rpc_clnt *cl_cb_client; u32 cl_cb_ident; - atomic_t cl_cb_set; +#define NFSD4_CB_UP 0 +#define NFSD4_CB_UNKNOWN 1 +#define NFSD4_CB_DOWN 2 + int cl_cb_state; struct nfsd4_callback cl_cb_null; struct nfsd4_session *cl_cb_session; |
