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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-18 11:34:58 -0800 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-18 12:30:47 -0800 |
| commit | b1c0df5fadc917ba3724ae9fdfcc6f97db34736a (patch) | |
| tree | 0f369742e4d930a2ae0de2bcd03373a47d7f0586 | |
| parent | 79969dd12e8756f64a999992c0536ccd91bf6e54 (diff) | |
| download | linux-stable-b1c0df5fadc917ba3724ae9fdfcc6f97db34736a.tar.gz linux-stable-b1c0df5fadc917ba3724ae9fdfcc6f97db34736a.tar.bz2 linux-stable-b1c0df5fadc917ba3724ae9fdfcc6f97db34736a.zip | |
NFSv4.1: Don't set up a backchannel if the server didn't agree to do so
If the server doesn't agree to out backchannel setup request, then
don't set one up.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
| -rw-r--r-- | fs/nfs/callback_proc.c | 2 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 7 | ||||
| -rw-r--r-- | fs/nfs/nfs4session.c | 2 |
3 files changed, 9 insertions, 2 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index e36a9d78ea49..197806fb87ff 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -427,6 +427,8 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, if (clp == NULL) goto out; + if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) + goto out; tbl = &clp->cl_session->bc_slot_table; spin_lock(&tbl->slot_tbl_lock); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 006bfa3da55b..59853797825c 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7195,6 +7195,8 @@ static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args struct nfs4_channel_attrs *sent = &args->bc_attrs; struct nfs4_channel_attrs *rcvd = &res->bc_attrs; + if (!(res->flags & SESSION4_BACK_CHAN)) + goto out; if (rcvd->max_rqst_sz > sent->max_rqst_sz) return -EINVAL; if (rcvd->max_resp_sz < sent->max_resp_sz) @@ -7206,6 +7208,7 @@ static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args return -EINVAL; if (rcvd->max_reqs != sent->max_reqs) return -EINVAL; +out: return 0; } @@ -7226,7 +7229,9 @@ static void nfs4_update_session(struct nfs4_session *session, nfs4_copy_sessionid(&session->sess_id, &res->sessionid); session->flags = res->flags; memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); - memcpy(&session->bc_attrs, &res->bc_attrs, sizeof(session->bc_attrs)); + if (res->flags & SESSION4_BACK_CHAN) + memcpy(&session->bc_attrs, &res->bc_attrs, + sizeof(session->bc_attrs)); } static int _nfs4_proc_create_session(struct nfs_client *clp, diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c index e799dc3c3b1d..e23366effcfb 100644 --- a/fs/nfs/nfs4session.c +++ b/fs/nfs/nfs4session.c @@ -450,7 +450,7 @@ int nfs4_setup_session_slot_tables(struct nfs4_session *ses) tbl = &ses->fc_slot_table; tbl->session = ses; status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1); - if (status) /* -ENOMEM */ + if (status || !(ses->flags & SESSION4_BACK_CHAN)) /* -ENOMEM */ return status; /* Back channel */ tbl = &ses->bc_slot_table; |