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
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <inttypes.h>
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#include <api/fs/tracing_path.h>
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#include <linux/err.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "thread_map.h"
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#include "evsel.h"
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#include "debug.h"
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#include "tests.h"
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int test__openat_syscall_event(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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int err = -1, fd;
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struct perf_evsel *evsel;
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unsigned int nr_openat_calls = 111, i;
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struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
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char sbuf[STRERR_BUFSIZE];
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char errbuf[BUFSIZ];
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if (threads == NULL) {
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pr_debug("thread_map__new\n");
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return -1;
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}
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evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
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if (IS_ERR(evsel)) {
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tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
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pr_debug("%s\n", errbuf);
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goto out_thread_map_delete;
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}
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if (perf_evsel__open_per_thread(evsel, threads) < 0) {
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pr_debug("failed to open counter: %s, "
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"tweak /proc/sys/kernel/perf_event_paranoid?\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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goto out_evsel_delete;
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}
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for (i = 0; i < nr_openat_calls; ++i) {
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fd = openat(0, "/etc/passwd", O_RDONLY);
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close(fd);
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}
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if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
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pr_debug("perf_evsel__read_on_cpu\n");
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goto out_close_fd;
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}
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if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) {
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pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
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nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val);
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goto out_close_fd;
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}
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err = 0;
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out_close_fd:
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perf_evsel__close_fd(evsel);
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out_evsel_delete:
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perf_evsel__delete(evsel);
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out_thread_map_delete:
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thread_map__put(threads);
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return err;
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}
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