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afs: Log remote unmarshalling errors

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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 <dhowells@redhat.com>
Tested-By: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/159465826250.1377938.16372395422217583913.stgit@warthog.procyon.org.uk/
Link: https://lore.kernel.org/r/160588532584.3465195.15618385466614028590.stgit@warthog.procyon.org.uk/ # rfc
Link: https://lore.kernel.org/r/161118149739.1232039.208060911149801695.stgit@warthog.procyon.org.uk/ # rfc
Link: https://lore.kernel.org/r/161161046033.2537118.7779717661044373273.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/161340409118.1303470.17812607349396199116.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/161539552964.286939.16503232687974398308.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/161653808989.2770958.11530765353025697860.stgit@warthog.procyon.org.uk/ # v5
Link: https://lore.kernel.org/r/161789092349.6155.8581594259882708631.stgit@warthog.procyon.org.uk/ # v6
This commit is contained in:
David Howells 2020-06-07 21:50:29 +01:00
parent f105da1a79
commit 05092755aa
1 changed files with 34 additions and 0 deletions
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34
fs/afs/rxrpc.c
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@ -500,6 +500,39 @@ error_kill_call:
_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;