diff options
Diffstat (limited to 'fs/nfsd/nfs4callback.c')
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index c74e4538d0eb..7caa3801ce72 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -60,16 +60,6 @@ struct nfs4_cb_compound_hdr { int status; }; -/* - * Handle decode buffer overflows out-of-line. - */ -static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) -{ - dprintk("NFS: %s prematurely hit the end of our receive buffer. " - "Remaining buffer length is %tu words.\n", - func, xdr->end - xdr->p); -} - static __be32 *xdr_encode_empty_array(__be32 *p) { *p++ = xdr_zero; @@ -240,7 +230,6 @@ static int decode_cb_op_status(struct xdr_stream *xdr, *status = nfs_cb_stat_to_errno(be32_to_cpup(p)); return 0; out_overflow: - print_overflow_msg(__func__, xdr); return -EIO; out_unexpected: dprintk("NFSD: Callback server returned operation %d but " @@ -309,7 +298,6 @@ static int decode_cb_compound4res(struct xdr_stream *xdr, hdr->nops = be32_to_cpup(p); return 0; out_overflow: - print_overflow_msg(__func__, xdr); return -EIO; } @@ -437,7 +425,6 @@ out: cb->cb_seq_status = status; return status; out_overflow: - print_overflow_msg(__func__, xdr); status = -EIO; goto out; } @@ -913,9 +900,9 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c return PTR_ERR(client); } cred = get_backchannel_cred(clp, client, ses); - if (IS_ERR(cred)) { + if (!cred) { rpc_shutdown_client(client); - return PTR_ERR(cred); + return -ENOMEM; } clp->cl_cb_client = client; clp->cl_cb_cred = cred; @@ -1023,8 +1010,9 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata) cb->cb_seq_status = 1; cb->cb_status = 0; if (minorversion) { - if (!nfsd41_cb_get_slot(clp, task)) + if (!cb->cb_holds_slot && !nfsd41_cb_get_slot(clp, task)) return; + cb->cb_holds_slot = true; } rpc_call_start(task); } @@ -1051,6 +1039,9 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback return true; } + if (!cb->cb_holds_slot) + goto need_restart; + switch (cb->cb_seq_status) { case 0: /* @@ -1089,6 +1080,7 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback cb->cb_seq_status); } + cb->cb_holds_slot = false; clear_bit(0, &clp->cl_cb_slot_busy); rpc_wake_up_next(&clp->cl_cb_waitq); dprintk("%s: freed slot, new seqid=%d\n", __func__, @@ -1296,6 +1288,7 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, cb->cb_seq_status = 1; cb->cb_status = 0; cb->cb_need_restart = false; + cb->cb_holds_slot = false; } void nfsd4_run_cb(struct nfsd4_callback *cb) |