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
156 lines
3.2 KiB
C
156 lines
3.2 KiB
C
/*
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* intel_pt_log.c: Intel Processor Trace support
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* Copyright (c) 2013-2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <string.h>
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#include "intel-pt-log.h"
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#include "intel-pt-insn-decoder.h"
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#include "intel-pt-pkt-decoder.h"
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#define MAX_LOG_NAME 256
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static FILE *f;
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static char log_name[MAX_LOG_NAME];
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bool intel_pt_enable_logging;
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void intel_pt_log_enable(void)
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{
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intel_pt_enable_logging = true;
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}
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void intel_pt_log_disable(void)
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{
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if (f)
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fflush(f);
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intel_pt_enable_logging = false;
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}
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void intel_pt_log_set_name(const char *name)
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{
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strncpy(log_name, name, MAX_LOG_NAME - 5);
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strcat(log_name, ".log");
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}
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static void intel_pt_print_data(const unsigned char *buf, int len, uint64_t pos,
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int indent)
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{
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int i;
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for (i = 0; i < indent; i++)
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fprintf(f, " ");
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fprintf(f, " %08" PRIx64 ": ", pos);
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for (i = 0; i < len; i++)
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fprintf(f, " %02x", buf[i]);
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for (; i < 16; i++)
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fprintf(f, " ");
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fprintf(f, " ");
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}
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static void intel_pt_print_no_data(uint64_t pos, int indent)
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{
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int i;
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for (i = 0; i < indent; i++)
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fprintf(f, " ");
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fprintf(f, " %08" PRIx64 ": ", pos);
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for (i = 0; i < 16; i++)
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fprintf(f, " ");
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fprintf(f, " ");
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}
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static int intel_pt_log_open(void)
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{
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if (!intel_pt_enable_logging)
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return -1;
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if (f)
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return 0;
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if (!log_name[0])
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return -1;
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f = fopen(log_name, "w+");
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if (!f) {
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intel_pt_enable_logging = false;
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return -1;
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}
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return 0;
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}
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void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
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uint64_t pos, const unsigned char *buf)
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{
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char desc[INTEL_PT_PKT_DESC_MAX];
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if (intel_pt_log_open())
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return;
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intel_pt_print_data(buf, pkt_len, pos, 0);
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intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);
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fprintf(f, "%s\n", desc);
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}
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void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
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{
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char desc[INTEL_PT_INSN_DESC_MAX];
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size_t len = intel_pt_insn->length;
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if (intel_pt_log_open())
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return;
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if (len > INTEL_PT_INSN_BUF_SZ)
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len = INTEL_PT_INSN_BUF_SZ;
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intel_pt_print_data(intel_pt_insn->buf, len, ip, 8);
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if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
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fprintf(f, "%s\n", desc);
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else
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fprintf(f, "Bad instruction!\n");
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}
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void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
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uint64_t ip)
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{
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char desc[INTEL_PT_INSN_DESC_MAX];
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if (intel_pt_log_open())
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return;
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intel_pt_print_no_data(ip, 8);
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if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
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fprintf(f, "%s\n", desc);
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else
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fprintf(f, "Bad instruction!\n");
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}
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void __intel_pt_log(const char *fmt, ...)
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{
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va_list args;
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if (intel_pt_log_open())
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return;
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va_start(args, fmt);
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vfprintf(f, fmt, args);
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va_end(args);
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}
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