16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
128 lines
3.9 KiB
Python
128 lines
3.9 KiB
Python
# intel-pt-events.py: Print Intel PT Power Events and PTWRITE
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# Copyright (c) 2017, Intel Corporation.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms and conditions of the GNU General Public License,
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# version 2, as published by the Free Software Foundation.
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#
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# This program is distributed in the hope it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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import os
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import sys
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import struct
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sys.path.append(os.environ['PERF_EXEC_PATH'] + \
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'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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# These perf imports are not used at present
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#from perf_trace_context import *
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#from Core import *
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def trace_begin():
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print "Intel PT Power Events and PTWRITE"
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def trace_end():
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print "End"
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def trace_unhandled(event_name, context, event_fields_dict):
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print ' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())])
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def print_ptwrite(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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flags = data[0]
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payload = data[1]
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exact_ip = flags & 1
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print "IP: %u payload: %#x" % (exact_ip, payload),
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def print_cbr(raw_buf):
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data = struct.unpack_from("<BBBBII", raw_buf)
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cbr = data[0]
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f = (data[4] + 500) / 1000
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p = ((cbr * 1000 / data[2]) + 5) / 10
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print "%3u freq: %4u MHz (%3u%%)" % (cbr, f, p),
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def print_mwait(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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payload = data[1]
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hints = payload & 0xff
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extensions = (payload >> 32) & 0x3
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print "hints: %#x extensions: %#x" % (hints, extensions),
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def print_pwre(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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payload = data[1]
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hw = (payload >> 7) & 1
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cstate = (payload >> 12) & 0xf
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subcstate = (payload >> 8) & 0xf
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print "hw: %u cstate: %u sub-cstate: %u" % (hw, cstate, subcstate),
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def print_exstop(raw_buf):
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data = struct.unpack_from("<I", raw_buf)
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flags = data[0]
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exact_ip = flags & 1
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print "IP: %u" % (exact_ip),
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def print_pwrx(raw_buf):
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data = struct.unpack_from("<IQ", raw_buf)
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payload = data[1]
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deepest_cstate = payload & 0xf
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last_cstate = (payload >> 4) & 0xf
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wake_reason = (payload >> 8) & 0xf
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print "deepest cstate: %u last cstate: %u wake reason: %#x" % (deepest_cstate, last_cstate, wake_reason),
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def print_common_start(comm, sample, name):
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ts = sample["time"]
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cpu = sample["cpu"]
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pid = sample["pid"]
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tid = sample["tid"]
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print "%16s %5u/%-5u [%03u] %9u.%09u %7s:" % (comm, pid, tid, cpu, ts / 1000000000, ts %1000000000, name),
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def print_common_ip(sample, symbol, dso):
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ip = sample["ip"]
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print "%16x %s (%s)" % (ip, symbol, dso)
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def process_event(param_dict):
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event_attr = param_dict["attr"]
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sample = param_dict["sample"]
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raw_buf = param_dict["raw_buf"]
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comm = param_dict["comm"]
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name = param_dict["ev_name"]
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# Symbol and dso info are not always resolved
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if (param_dict.has_key("dso")):
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dso = param_dict["dso"]
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else:
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dso = "[unknown]"
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if (param_dict.has_key("symbol")):
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symbol = param_dict["symbol"]
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else:
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symbol = "[unknown]"
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if name == "ptwrite":
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print_common_start(comm, sample, name)
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print_ptwrite(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "cbr":
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print_common_start(comm, sample, name)
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print_cbr(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "mwait":
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print_common_start(comm, sample, name)
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print_mwait(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "pwre":
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print_common_start(comm, sample, name)
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print_pwre(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "exstop":
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print_common_start(comm, sample, name)
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print_exstop(raw_buf)
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print_common_ip(sample, symbol, dso)
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elif name == "pwrx":
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print_common_start(comm, sample, name)
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print_pwrx(raw_buf)
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print_common_ip(sample, symbol, dso)
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