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
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <string.h>
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#include "perf_regs.h"
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#include "thread.h"
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#include "map.h"
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#include "event.h"
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#include "debug.h"
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#include "tests/tests.h"
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#define STACK_SIZE 8192
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static int sample_ustack(struct perf_sample *sample,
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struct thread *thread, u64 *regs)
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{
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struct stack_dump *stack = &sample->user_stack;
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struct map *map;
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unsigned long sp;
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u64 stack_size, *buf;
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buf = malloc(STACK_SIZE);
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if (!buf) {
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pr_debug("failed to allocate sample uregs data\n");
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return -1;
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}
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sp = (unsigned long) regs[PERF_REG_ARM_SP];
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map = map_groups__find(thread->mg, MAP__VARIABLE, (u64) sp);
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if (!map) {
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pr_debug("failed to get stack map\n");
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free(buf);
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return -1;
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}
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stack_size = map->end - sp;
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stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
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memcpy(buf, (void *) sp, stack_size);
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stack->data = (char *) buf;
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stack->size = stack_size;
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return 0;
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}
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int test__arch_unwind_sample(struct perf_sample *sample,
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struct thread *thread)
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{
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struct regs_dump *regs = &sample->user_regs;
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u64 *buf;
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buf = calloc(1, sizeof(u64) * PERF_REGS_MAX);
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if (!buf) {
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pr_debug("failed to allocate sample uregs data\n");
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return -1;
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}
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perf_regs_load(buf);
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regs->abi = PERF_SAMPLE_REGS_ABI;
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regs->regs = buf;
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regs->mask = PERF_REGS_MASK;
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return sample_ustack(sample, thread, buf);
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}
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