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
83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
# perf script event handlers, generated by perf script -g python
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# (c) 2010, Tom Zanussi <tzanussi@gmail.com>
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# Licensed under the terms of the GNU GPL License version 2
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#
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# This script tests basic functionality such as flag and symbol
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# strings, common_xxx() calls back into perf, begin, end, unhandled
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# events, etc. Basically, if this script runs successfully and
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# displays expected results, Python scripting support should be ok.
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import os
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import sys
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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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from Core import *
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from perf_trace_context import *
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unhandled = autodict()
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def trace_begin():
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print "trace_begin"
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pass
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def trace_end():
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print_unhandled()
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def irq__softirq_entry(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, vec):
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print_header(event_name, common_cpu, common_secs, common_nsecs,
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common_pid, common_comm)
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print_uncommon(context)
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print "vec=%s\n" % \
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(symbol_str("irq__softirq_entry", "vec", vec)),
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def kmem__kmalloc(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, call_site, ptr, bytes_req, bytes_alloc,
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gfp_flags):
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print_header(event_name, common_cpu, common_secs, common_nsecs,
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common_pid, common_comm)
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print_uncommon(context)
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print "call_site=%u, ptr=%u, bytes_req=%u, " \
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"bytes_alloc=%u, gfp_flags=%s\n" % \
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(call_site, ptr, bytes_req, bytes_alloc,
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flag_str("kmem__kmalloc", "gfp_flags", gfp_flags)),
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def trace_unhandled(event_name, context, event_fields_dict):
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try:
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unhandled[event_name] += 1
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except TypeError:
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unhandled[event_name] = 1
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def print_header(event_name, cpu, secs, nsecs, pid, comm):
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print "%-20s %5u %05u.%09u %8u %-20s " % \
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(event_name, cpu, secs, nsecs, pid, comm),
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# print trace fields not included in handler args
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def print_uncommon(context):
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print "common_preempt_count=%d, common_flags=%s, common_lock_depth=%d, " \
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% (common_pc(context), trace_flag_str(common_flags(context)), \
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common_lock_depth(context))
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def print_unhandled():
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keys = unhandled.keys()
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if not keys:
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return
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print "\nunhandled events:\n\n",
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print "%-40s %10s\n" % ("event", "count"),
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print "%-40s %10s\n" % ("----------------------------------------", \
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"-----------"),
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for event_name in keys:
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print "%-40s %10d\n" % (event_name, unhandled[event_name])
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