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
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright(C) 2015 Linaro Limited. All rights reserved.
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*/
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#include <stdbool.h>
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#include <linux/coresight-pmu.h>
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#include "../../util/auxtrace.h"
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#include "../../util/evlist.h"
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#include "../../util/pmu.h"
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#include "cs-etm.h"
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#include "arm-spe.h"
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static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err)
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{
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struct perf_pmu **arm_spe_pmus = NULL;
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int ret, i, nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
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/* arm_spe_xxxxxxxxx\0 */
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char arm_spe_pmu_name[sizeof(ARM_SPE_PMU_NAME) + 10];
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arm_spe_pmus = zalloc(sizeof(struct perf_pmu *) * nr_cpus);
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if (!arm_spe_pmus) {
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pr_err("spes alloc failed\n");
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*err = -ENOMEM;
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return NULL;
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}
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for (i = 0; i < nr_cpus; i++) {
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ret = sprintf(arm_spe_pmu_name, "%s%d", ARM_SPE_PMU_NAME, i);
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if (ret < 0) {
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pr_err("sprintf failed\n");
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*err = -ENOMEM;
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return NULL;
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}
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arm_spe_pmus[*nr_spes] = perf_pmu__find(arm_spe_pmu_name);
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if (arm_spe_pmus[*nr_spes]) {
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pr_debug2("%s %d: arm_spe_pmu %d type %d name %s\n",
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__func__, __LINE__, *nr_spes,
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arm_spe_pmus[*nr_spes]->type,
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arm_spe_pmus[*nr_spes]->name);
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(*nr_spes)++;
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}
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}
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return arm_spe_pmus;
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}
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struct auxtrace_record
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*auxtrace_record__init(struct perf_evlist *evlist, int *err)
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{
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struct perf_pmu *cs_etm_pmu;
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struct perf_evsel *evsel;
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bool found_etm = false;
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bool found_spe = false;
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static struct perf_pmu **arm_spe_pmus = NULL;
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static int nr_spes = 0;
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int i = 0;
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if (!evlist)
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return NULL;
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cs_etm_pmu = perf_pmu__find(CORESIGHT_ETM_PMU_NAME);
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if (!arm_spe_pmus)
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arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err);
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evlist__for_each_entry(evlist, evsel) {
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if (cs_etm_pmu &&
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evsel->attr.type == cs_etm_pmu->type)
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found_etm = true;
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if (!nr_spes)
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continue;
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for (i = 0; i < nr_spes; i++) {
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if (evsel->attr.type == arm_spe_pmus[i]->type) {
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found_spe = true;
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break;
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}
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}
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}
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if (found_etm && found_spe) {
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pr_err("Concurrent ARM Coresight ETM and SPE operation not currently supported\n");
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*err = -EOPNOTSUPP;
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return NULL;
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}
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if (found_etm)
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return cs_etm_record_init(err);
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#if defined(__aarch64__)
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if (found_spe)
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return arm_spe_recording_init(err, arm_spe_pmus[i]);
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#endif
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/*
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* Clear 'err' even if we haven't found an event - that way perf
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* record can still be used even if tracers aren't present. The NULL
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* return value will take care of telling the infrastructure HW tracing
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* isn't available.
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*/
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*err = 0;
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return NULL;
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}
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