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
107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "perf.h"
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#include "util/util.h"
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#include "util/debug.h"
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#include <subcmd/parse-options.h>
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#include "util/parse-branch-options.h"
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#define BRANCH_OPT(n, m) \
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{ .name = n, .mode = (m) }
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#define BRANCH_END { .name = NULL }
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struct branch_mode {
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const char *name;
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int mode;
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};
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static const struct branch_mode branch_modes[] = {
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BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
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BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
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BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
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BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
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BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
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BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
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BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
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BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
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BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
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BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
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BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
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BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
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BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
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BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
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BRANCH_END
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};
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int parse_branch_str(const char *str, __u64 *mode)
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{
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#define ONLY_PLM \
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(PERF_SAMPLE_BRANCH_USER |\
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PERF_SAMPLE_BRANCH_KERNEL |\
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PERF_SAMPLE_BRANCH_HV)
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int ret = 0;
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char *p, *s;
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char *os = NULL;
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const struct branch_mode *br;
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if (str == NULL) {
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*mode = PERF_SAMPLE_BRANCH_ANY;
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return 0;
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}
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/* because str is read-only */
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s = os = strdup(str);
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if (!s)
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return -1;
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for (;;) {
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p = strchr(s, ',');
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if (p)
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*p = '\0';
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for (br = branch_modes; br->name; br++) {
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if (!strcasecmp(s, br->name))
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break;
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}
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if (!br->name) {
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ret = -1;
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pr_warning("unknown branch filter %s,"
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" check man page\n", s);
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goto error;
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}
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*mode |= br->mode;
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if (!p)
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break;
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s = p + 1;
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}
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/* default to any branch */
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if ((*mode & ~ONLY_PLM) == 0) {
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*mode = PERF_SAMPLE_BRANCH_ANY;
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}
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error:
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free(os);
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return ret;
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}
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int
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parse_branch_stack(const struct option *opt, const char *str, int unset)
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{
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__u64 *mode = (__u64 *)opt->value;
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if (unset)
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return 0;
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/*
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* cannot set it twice, -b + --branch-filter for instance
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*/
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if (*mode)
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return -1;
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return parse_branch_str(str, mode);
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}
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