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
134 lines
2.8 KiB
C
134 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Originally done by Vince Weaver <vincent.weaver@maine.edu> for
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* perf_event_tests (git://github.com/deater/perf_event_tests)
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*/
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/*
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* Powerpc needs __SANE_USERSPACE_TYPES__ before <linux/types.h> to select
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* 'int-ll64.h' and avoid compile warnings when printing __u64 with %llu.
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*/
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#define __SANE_USERSPACE_TYPES__
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <time.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <sys/mman.h>
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#include <linux/compiler.h>
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#include <linux/hw_breakpoint.h>
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#include "tests.h"
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#include "debug.h"
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#include "perf.h"
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#include "cloexec.h"
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static int overflows;
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static noinline int test_function(void)
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{
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return time(NULL);
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}
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static void sig_handler(int signum __maybe_unused,
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siginfo_t *oh __maybe_unused,
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void *uc __maybe_unused)
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{
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overflows++;
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}
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static long long bp_count(int fd)
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{
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long long count;
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int ret;
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ret = read(fd, &count, sizeof(long long));
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if (ret != sizeof(long long)) {
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pr_debug("failed to read: %d\n", ret);
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return TEST_FAIL;
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}
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return count;
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}
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#define EXECUTIONS 10000
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#define THRESHOLD 100
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int test__bp_signal_overflow(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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struct perf_event_attr pe;
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struct sigaction sa;
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long long count;
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int fd, i, fails = 0;
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/* setup SIGIO signal handler */
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memset(&sa, 0, sizeof(struct sigaction));
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sa.sa_sigaction = (void *) sig_handler;
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sa.sa_flags = SA_SIGINFO;
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if (sigaction(SIGIO, &sa, NULL) < 0) {
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pr_debug("failed setting up signal handler\n");
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return TEST_FAIL;
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}
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memset(&pe, 0, sizeof(struct perf_event_attr));
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pe.type = PERF_TYPE_BREAKPOINT;
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pe.size = sizeof(struct perf_event_attr);
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pe.config = 0;
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pe.bp_type = HW_BREAKPOINT_X;
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pe.bp_addr = (unsigned long) test_function;
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pe.bp_len = sizeof(long);
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pe.sample_period = THRESHOLD;
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pe.sample_type = PERF_SAMPLE_IP;
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pe.wakeup_events = 1;
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pe.disabled = 1;
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pe.exclude_kernel = 1;
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pe.exclude_hv = 1;
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fd = sys_perf_event_open(&pe, 0, -1, -1,
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perf_event_open_cloexec_flag());
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if (fd < 0) {
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pr_debug("failed opening event %llx\n", pe.config);
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return TEST_FAIL;
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}
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fcntl(fd, F_SETFL, O_RDWR|O_NONBLOCK|O_ASYNC);
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fcntl(fd, F_SETSIG, SIGIO);
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fcntl(fd, F_SETOWN, getpid());
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ioctl(fd, PERF_EVENT_IOC_RESET, 0);
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ioctl(fd, PERF_EVENT_IOC_ENABLE, 0);
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for (i = 0; i < EXECUTIONS; i++)
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test_function();
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ioctl(fd, PERF_EVENT_IOC_DISABLE, 0);
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count = bp_count(fd);
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close(fd);
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pr_debug("count %lld, overflow %d\n",
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count, overflows);
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if (count != EXECUTIONS) {
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pr_debug("\tWrong number of executions %lld != %d\n",
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count, EXECUTIONS);
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fails++;
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}
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if (overflows != EXECUTIONS / THRESHOLD) {
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pr_debug("\tWrong number of overflows %d != %d\n",
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overflows, EXECUTIONS / THRESHOLD);
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fails++;
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}
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return fails ? TEST_FAIL : TEST_OK;
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}
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