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authorDavid Howells <dhowells@redhat.com>2017-04-06 11:12:00 +0200
committerDavid Howells <dhowells@redhat.com>2017-04-06 12:09:39 +0200
commitfb46f6ee10e78799ea38cf97e4bf52cb70f1228a (patch)
tree070c369bd2417cc34c6e61b93e8567450406a55c /usr/Kconfig
parentrxrpc: Handle temporary errors better in rxkad security (diff)
downloadlinux-fb46f6ee10e78799ea38cf97e4bf52cb70f1228a.tar.xz
linux-fb46f6ee10e78799ea38cf97e4bf52cb70f1228a.zip
rxrpc: Trace protocol errors in received packets
Add a tracepoint (rxrpc_rx_proto) to record protocol errors in received packets. The following changes are made: (1) Add a function, __rxrpc_abort_eproto(), to note a protocol error on a call and mark the call aborted. This is wrapped by rxrpc_abort_eproto() that makes the why string usable in trace. (2) Add trace_rxrpc_rx_proto() or rxrpc_abort_eproto() to protocol error generation points, replacing rxrpc_abort_call() with the latter. (3) Only send an abort packet in rxkad_verify_packet*() if we actually managed to abort the call. Note that a trace event is also emitted if a kernel user (e.g. afs) tries to send data through a call when it's not in the transmission phase, though it's not technically a receive event. Signed-off-by: David Howells <dhowells@redhat.com>
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