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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 04/13] afs: Log remote unmarshalling errors From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Alexander Viro , Matthew Wilcox Cc: Jeff Layton , Dave Wysochanski , dhowells@redhat.com, linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 13 Jul 2020 17:37:42 +0100 Message-ID: <159465826250.1377938.16372395422217583913.stgit@warthog.procyon.org.uk> In-Reply-To: <159465821598.1377938.2046362270225008168.stgit@warthog.procyon.org.uk> References: <159465821598.1377938.2046362270225008168.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.22 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Log unmarshalling errors reported by the peer (ie. it can't parse what we sent it). Limit the maximum number of messages to 3. Signed-off-by: David Howells --- fs/afs/rxrpc.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 3b90ecf7958d..48361bbd4859 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -500,6 +500,39 @@ void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp) _leave(" = %d", ret); } +/* + * Log remote abort codes that indicate that we have a protocol disagreement + * with the server. + */ +static void afs_log_error(struct afs_call *call, s32 remote_abort) +{ + static int max = 0; + const char *msg; + int m; + + switch (remote_abort) { + case RX_EOF: msg = "unexpected EOF"; break; + case RXGEN_CC_MARSHAL: msg = "client marshalling"; break; + case RXGEN_CC_UNMARSHAL: msg = "client unmarshalling"; break; + case RXGEN_SS_MARSHAL: msg = "server marshalling"; break; + case RXGEN_SS_UNMARSHAL: msg = "server unmarshalling"; break; + case RXGEN_DECODE: msg = "opcode decode"; break; + case RXGEN_SS_XDRFREE: msg = "server XDR cleanup"; break; + case RXGEN_CC_XDRFREE: msg = "client XDR cleanup"; break; + case -32: msg = "insufficient data"; break; + default: + return; + } + + m = max; + if (m < 3) { + max = m + 1; + pr_notice("kAFS: Peer reported %s failure on %s [%pISp]\n", + msg, call->type->name, + &call->alist->addrs[call->addr_ix].transport); + } +} + /* * deliver messages to a call */ @@ -563,6 +596,7 @@ static void afs_deliver_to_call(struct afs_call *call) goto out; case -ECONNABORTED: ASSERTCMP(state, ==, AFS_CALL_COMPLETE); + afs_log_error(call, call->abort_code); goto done; case -ENOTSUPP: abort_code = RXGEN_OPCODE;