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
64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
# system call counts
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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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# Displays system-wide system call totals, broken down by syscall.
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# If a [comm] arg is specified, only syscalls called by [comm] are displayed.
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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 perf_trace_context import *
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from Core import *
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from Util import syscall_name
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usage = "perf script -s syscall-counts.py [comm]\n";
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for_comm = None
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if len(sys.argv) > 2:
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sys.exit(usage)
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if len(sys.argv) > 1:
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for_comm = sys.argv[1]
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syscalls = autodict()
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def trace_begin():
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print "Press control+C to stop and show the summary"
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def trace_end():
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print_syscall_totals()
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def raw_syscalls__sys_enter(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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common_callchain, id, args):
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if for_comm is not None:
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if common_comm != for_comm:
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return
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try:
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syscalls[id] += 1
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except TypeError:
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syscalls[id] = 1
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def syscalls__sys_enter(event_name, context, common_cpu,
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common_secs, common_nsecs, common_pid, common_comm,
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id, args):
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raw_syscalls__sys_enter(**locals())
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def print_syscall_totals():
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if for_comm is not None:
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print "\nsyscall events for %s:\n\n" % (for_comm),
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else:
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print "\nsyscall 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 id, val in sorted(syscalls.iteritems(), key = lambda(k, v): (v, k), \
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reverse = True):
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print "%-40s %10d\n" % (syscall_name(id), val),
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