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
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*
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* Context.c. Python interfaces for perf script.
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*
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* Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <Python.h>
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#include "../../../perf.h"
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#include "../../../util/trace-event.h"
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#if PY_MAJOR_VERSION < 3
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#define _PyCapsule_GetPointer(arg1, arg2) \
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PyCObject_AsVoidPtr(arg1)
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PyMODINIT_FUNC initperf_trace_context(void);
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#else
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#define _PyCapsule_GetPointer(arg1, arg2) \
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PyCapsule_GetPointer((arg1), (arg2))
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PyMODINIT_FUNC PyInit_perf_trace_context(void);
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#endif
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static PyObject *perf_trace_context_common_pc(PyObject *obj, PyObject *args)
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{
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static struct scripting_context *scripting_context;
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PyObject *context;
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int retval;
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if (!PyArg_ParseTuple(args, "O", &context))
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return NULL;
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scripting_context = _PyCapsule_GetPointer(context, NULL);
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retval = common_pc(scripting_context);
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return Py_BuildValue("i", retval);
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}
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static PyObject *perf_trace_context_common_flags(PyObject *obj,
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PyObject *args)
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{
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static struct scripting_context *scripting_context;
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PyObject *context;
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int retval;
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if (!PyArg_ParseTuple(args, "O", &context))
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return NULL;
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scripting_context = _PyCapsule_GetPointer(context, NULL);
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retval = common_flags(scripting_context);
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return Py_BuildValue("i", retval);
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}
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static PyObject *perf_trace_context_common_lock_depth(PyObject *obj,
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PyObject *args)
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{
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static struct scripting_context *scripting_context;
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PyObject *context;
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int retval;
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if (!PyArg_ParseTuple(args, "O", &context))
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return NULL;
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scripting_context = _PyCapsule_GetPointer(context, NULL);
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retval = common_lock_depth(scripting_context);
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return Py_BuildValue("i", retval);
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}
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static PyMethodDef ContextMethods[] = {
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{ "common_pc", perf_trace_context_common_pc, METH_VARARGS,
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"Get the common preempt count event field value."},
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{ "common_flags", perf_trace_context_common_flags, METH_VARARGS,
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"Get the common flags event field value."},
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{ "common_lock_depth", perf_trace_context_common_lock_depth,
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METH_VARARGS, "Get the common lock depth event field value."},
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{ NULL, NULL, 0, NULL}
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};
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#if PY_MAJOR_VERSION < 3
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PyMODINIT_FUNC initperf_trace_context(void)
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{
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(void) Py_InitModule("perf_trace_context", ContextMethods);
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}
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#else
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PyMODINIT_FUNC PyInit_perf_trace_context(void)
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{
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static struct PyModuleDef moduledef = {
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PyModuleDef_HEAD_INIT,
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"perf_trace_context", /* m_name */
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"", /* m_doc */
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-1, /* m_size */
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ContextMethods, /* m_methods */
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NULL, /* m_reload */
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NULL, /* m_traverse */
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NULL, /* m_clear */
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NULL, /* m_free */
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};
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return PyModule_Create(&moduledef);
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}
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#endif
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