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
49 lines
1,014 B
C
49 lines
1,014 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <signal.h>
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#include <stdlib.h>
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#include "tests.h"
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#include "debug.h"
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#include "util.h"
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#include "perf-hooks.h"
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static void sigsegv_handler(int sig __maybe_unused)
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{
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pr_debug("SIGSEGV is observed as expected, try to recover.\n");
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perf_hooks__recover();
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signal(SIGSEGV, SIG_DFL);
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raise(SIGSEGV);
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exit(-1);
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}
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static void the_hook(void *_hook_flags)
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{
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int *hook_flags = _hook_flags;
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int *p = NULL;
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*hook_flags = 1234;
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/* Generate a segfault, test perf_hooks__recover */
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*p = 0;
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}
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int test__perf_hooks(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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int hook_flags = 0;
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signal(SIGSEGV, sigsegv_handler);
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perf_hooks__set_hook("test", the_hook, &hook_flags);
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perf_hooks__invoke_test();
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/* hook is triggered? */
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if (hook_flags != 1234) {
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pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
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return TEST_FAIL;
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}
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/* the buggy hook is removed? */
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if (perf_hooks__get_hook("test"))
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return TEST_FAIL;
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return TEST_OK;
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}
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