/* Index of predefined Linux callback client operations */
enum {
- NFSPROC4_CLNT_CB_NULL = 0,
+ NFSPROC4_CLNT_CB_NULL = 0,
NFSPROC4_CLNT_CB_RECALL,
};
int status;
u32 ident;
u32 nops;
+ __be32 *nops_p;
+ u32 minorversion;
u32 taglen;
- char * tag;
+ char *tag;
};
static struct {
* XDR encode
*/
-static int
+static void
encode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr)
{
__be32 * p;
RESERVE_SPACE(16);
WRITE32(0); /* tag length is always 0 */
- WRITE32(NFS4_MINOR_VERSION);
+ WRITE32(hdr->minorversion);
WRITE32(hdr->ident);
+ hdr->nops_p = p;
WRITE32(hdr->nops);
- return 0;
}
-static int
-encode_cb_recall(struct xdr_stream *xdr, struct nfs4_cb_recall *cb_rec)
+static void encode_cb_nops(struct nfs4_cb_compound_hdr *hdr)
+{
+ *hdr->nops_p = htonl(hdr->nops);
+}
+
+static void
+encode_cb_recall(struct xdr_stream *xdr, struct nfs4_delegation *dp,
+ struct nfs4_cb_compound_hdr *hdr)
{
__be32 *p;
- int len = cb_rec->cbr_fh.fh_size;
+ int len = dp->dl_fh.fh_size;
- RESERVE_SPACE(12+sizeof(cb_rec->cbr_stateid) + len);
+ RESERVE_SPACE(12+sizeof(dp->dl_stateid) + len);
WRITE32(OP_CB_RECALL);
- WRITE32(cb_rec->cbr_stateid.si_generation);
- WRITEMEM(&cb_rec->cbr_stateid.si_opaque, sizeof(stateid_opaque_t));
- WRITE32(cb_rec->cbr_trunc);
+ WRITE32(dp->dl_stateid.si_generation);
+ WRITEMEM(&dp->dl_stateid.si_opaque, sizeof(stateid_opaque_t));
+ WRITE32(0); /* truncate optimization not implemented */
WRITE32(len);
- WRITEMEM(&cb_rec->cbr_fh.fh_base, len);
- return 0;
+ WRITEMEM(&dp->dl_fh.fh_base, len);
+ hdr->nops++;
}
static int
}
static int
-nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_cb_recall *args)
+nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_delegation *args)
{
struct xdr_stream xdr;
struct nfs4_cb_compound_hdr hdr = {
- .ident = args->cbr_ident,
- .nops = 1,
+ .ident = args->dl_ident,
};
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cb_compound_hdr(&xdr, &hdr);
- return (encode_cb_recall(&xdr, args));
+ encode_cb_recall(&xdr, args, &hdr);
+ encode_cb_nops(&hdr);
+ return 0;
}
int setup_callback_client(struct nfs4_client *clp)
{
- struct sockaddr_in addr;
- struct nfs4_callback *cb = &clp->cl_callback;
+ struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
struct rpc_timeout timeparms = {
.to_initval = max_cb_time(),
.to_retries = 0,
};
struct rpc_create_args args = {
.protocol = IPPROTO_TCP,
- .address = (struct sockaddr *)&addr,
- .addrsize = sizeof(addr),
+ .address = (struct sockaddr *) &cb->cb_addr,
+ .addrsize = cb->cb_addrlen,
.timeout = &timeparms,
.program = &cb_program,
.prognumber = cb->cb_prog,
if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
return -EINVAL;
- /* Initialize address */
- memset(&addr, 0, sizeof(addr));
- addr.sin_family = AF_INET;
- addr.sin_port = htons(cb->cb_port);
- addr.sin_addr.s_addr = htonl(cb->cb_addr);
-
/* Create RPC client */
client = rpc_create(&args);
if (IS_ERR(client)) {
}
-static int do_probe_callback(void *data)
+static void warn_no_callback_path(struct nfs4_client *clp, int reason)
+{
+ dprintk("NFSD: warning: no callback path to client %.*s: error %d\n",
+ (int)clp->cl_name.len, clp->cl_name.data, reason);
+}
+
+static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_client *clp = calldata;
+
+ if (task->tk_status)
+ warn_no_callback_path(clp, task->tk_status);
+ else
+ atomic_set(&clp->cl_cb_conn.cb_set, 1);
+ put_nfs4_client(clp);
+}
+
+static const struct rpc_call_ops nfsd4_cb_probe_ops = {
+ .rpc_call_done = nfsd4_cb_probe_done,
+};
+
+static struct rpc_cred *callback_cred;
+
+int set_callback_cred(void)
{
- struct nfs4_client *clp = data;
- struct nfs4_callback *cb = &clp->cl_callback;
+ callback_cred = rpc_lookup_machine_cred();
+ if (!callback_cred)
+ return -ENOMEM;
+ return 0;
+}
+
+
+void do_probe_callback(struct nfs4_client *clp)
+{
+ struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
.rpc_argp = clp,
+ .rpc_cred = callback_cred
};
int status;
- status = setup_callback_client(clp);
- if (status)
- goto out_err;
-
- status = rpc_call_sync(cb->cb_client, &msg, RPC_TASK_SOFT);
-
- if (status)
- goto out_release_client;
-
- atomic_set(&cb->cb_set, 1);
- put_nfs4_client(clp);
- return 0;
-out_release_client:
- rpc_shutdown_client(cb->cb_client);
- cb->cb_client = NULL;
-out_err:
- dprintk("NFSD: warning: no callback path to client %.*s: error %d\n",
- (int)clp->cl_name.len, clp->cl_name.data, status);
- put_nfs4_client(clp);
- return 0;
+ status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_SOFT,
+ &nfsd4_cb_probe_ops, (void *)clp);
+ if (status) {
+ warn_no_callback_path(clp, status);
+ put_nfs4_client(clp);
+ }
}
/*
void
nfsd4_probe_callback(struct nfs4_client *clp)
{
- struct task_struct *t;
+ int status;
+
+ BUG_ON(atomic_read(&clp->cl_cb_conn.cb_set));
- BUG_ON(atomic_read(&clp->cl_callback.cb_set));
+ status = setup_callback_client(clp);
+ if (status) {
+ warn_no_callback_path(clp, status);
+ return;
+ }
/* the task holds a reference to the nfs4_client struct */
atomic_inc(&clp->cl_count);
- t = kthread_run(do_probe_callback, clp, "nfs4_cb_probe");
+ do_probe_callback(clp);
+}
+
+static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_delegation *dp = calldata;
+ struct nfs4_client *clp = dp->dl_client;
+
+ switch (task->tk_status) {
+ case -EIO:
+ /* Network partition? */
+ atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ warn_no_callback_path(clp, task->tk_status);
+ case -EBADHANDLE:
+ case -NFS4ERR_BAD_STATEID:
+ /* Race: client probably got cb_recall
+ * before open reply granting delegation */
+ break;
+ default:
+ /* success, or error we can't handle */
+ return;
+ }
+ if (dp->dl_retries--) {
+ rpc_delay(task, 2*HZ);
+ task->tk_status = 0;
+ rpc_restart_call(task);
+ } else {
+ atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ warn_no_callback_path(clp, task->tk_status);
+ }
+}
- if (IS_ERR(t))
- atomic_dec(&clp->cl_count);
+static void nfsd4_cb_recall_release(void *calldata)
+{
+ struct nfs4_delegation *dp = calldata;
+ struct nfs4_client *clp = dp->dl_client;
- return;
+ nfs4_put_delegation(dp);
+ put_nfs4_client(clp);
}
+static const struct rpc_call_ops nfsd4_cb_recall_ops = {
+ .rpc_call_done = nfsd4_cb_recall_done,
+ .rpc_release = nfsd4_cb_recall_release,
+};
+
/*
* called with dp->dl_count inc'ed.
*/
nfsd4_cb_recall(struct nfs4_delegation *dp)
{
struct nfs4_client *clp = dp->dl_client;
- struct rpc_clnt *clnt = clp->cl_callback.cb_client;
- struct nfs4_cb_recall *cbr = &dp->dl_recall;
+ struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL],
- .rpc_argp = cbr,
+ .rpc_argp = dp,
+ .rpc_cred = callback_cred
};
- int retries = 1;
- int status = 0;
-
- cbr->cbr_trunc = 0; /* XXX need to implement truncate optimization */
- cbr->cbr_dp = dp;
-
- status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
- while (retries--) {
- switch (status) {
- case -EIO:
- /* Network partition? */
- atomic_set(&clp->cl_callback.cb_set, 0);
- case -EBADHANDLE:
- case -NFS4ERR_BAD_STATEID:
- /* Race: client probably got cb_recall
- * before open reply granting delegation */
- break;
- default:
- goto out_put_cred;
- }
- ssleep(2);
- status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
+ int status;
+
+ dp->dl_retries = 1;
+ status = rpc_call_async(clnt, &msg, RPC_TASK_SOFT,
+ &nfsd4_cb_recall_ops, dp);
+ if (status) {
+ put_nfs4_client(clp);
+ nfs4_put_delegation(dp);
}
-out_put_cred:
- /*
- * Success or failure, now we're either waiting for lease expiration
- * or deleg_return.
- */
- put_nfs4_client(clp);
- nfs4_put_delegation(dp);
- return;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff