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
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* builtin-kallsyms.c
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*
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* Builtin command: Look for a symbol in the running kernel and its modules
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*
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* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include <inttypes.h>
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#include "builtin.h"
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#include <linux/compiler.h>
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#include <subcmd/parse-options.h>
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#include "debug.h"
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#include "machine.h"
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#include "symbol.h"
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static int __cmd_kallsyms(int argc, const char **argv)
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{
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int i;
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struct machine *machine = machine__new_kallsyms();
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if (machine == NULL) {
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pr_err("Couldn't read /proc/kallsyms\n");
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return -1;
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}
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for (i = 0; i < argc; ++i) {
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struct map *map;
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struct symbol *symbol = machine__find_kernel_function_by_name(machine, argv[i], &map);
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if (symbol == NULL) {
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printf("%s: not found\n", argv[i]);
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continue;
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}
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printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
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symbol->name, map->dso->short_name, map->dso->long_name,
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map->unmap_ip(map, symbol->start), map->unmap_ip(map, symbol->end),
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symbol->start, symbol->end);
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}
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machine__delete(machine);
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return 0;
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}
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int cmd_kallsyms(int argc, const char **argv)
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{
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const struct option options[] = {
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OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
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OPT_END()
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};
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const char * const kallsyms_usage[] = {
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"perf kallsyms [<options>] symbol_name",
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NULL
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};
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argc = parse_options(argc, argv, options, kallsyms_usage, 0);
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if (argc < 1)
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usage_with_options(kallsyms_usage, options);
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symbol_conf.sort_by_name = true;
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symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
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if (symbol__init(NULL) < 0)
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return -1;
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return __cmd_kallsyms(argc, argv);
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}
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