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
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
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* intel_pt_decoder.h: 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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#ifndef INCLUDE__INTEL_PT_DECODER_H__
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#define INCLUDE__INTEL_PT_DECODER_H__
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include "intel-pt-insn-decoder.h"
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#define INTEL_PT_IN_TX (1 << 0)
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#define INTEL_PT_ABORT_TX (1 << 1)
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#define INTEL_PT_ASYNC (1 << 2)
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#define INTEL_PT_FUP_IP (1 << 3)
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enum intel_pt_sample_type {
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INTEL_PT_BRANCH = 1 << 0,
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INTEL_PT_INSTRUCTION = 1 << 1,
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INTEL_PT_TRANSACTION = 1 << 2,
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INTEL_PT_PTW = 1 << 3,
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INTEL_PT_MWAIT_OP = 1 << 4,
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INTEL_PT_PWR_ENTRY = 1 << 5,
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INTEL_PT_EX_STOP = 1 << 6,
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INTEL_PT_PWR_EXIT = 1 << 7,
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INTEL_PT_CBR_CHG = 1 << 8,
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};
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enum intel_pt_period_type {
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INTEL_PT_PERIOD_NONE,
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INTEL_PT_PERIOD_INSTRUCTIONS,
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INTEL_PT_PERIOD_TICKS,
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INTEL_PT_PERIOD_MTC,
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};
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enum {
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INTEL_PT_ERR_NOMEM = 1,
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INTEL_PT_ERR_INTERN,
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INTEL_PT_ERR_BADPKT,
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INTEL_PT_ERR_NODATA,
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INTEL_PT_ERR_NOINSN,
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INTEL_PT_ERR_MISMAT,
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INTEL_PT_ERR_OVR,
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INTEL_PT_ERR_LOST,
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INTEL_PT_ERR_UNK,
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INTEL_PT_ERR_NELOOP,
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INTEL_PT_ERR_MAX,
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};
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struct intel_pt_state {
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enum intel_pt_sample_type type;
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int err;
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uint64_t from_ip;
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uint64_t to_ip;
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uint64_t cr3;
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uint64_t tot_insn_cnt;
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uint64_t timestamp;
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uint64_t est_timestamp;
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uint64_t trace_nr;
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uint64_t ptw_payload;
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uint64_t mwait_payload;
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uint64_t pwre_payload;
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uint64_t pwrx_payload;
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uint64_t cbr_payload;
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uint32_t flags;
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enum intel_pt_insn_op insn_op;
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int insn_len;
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char insn[INTEL_PT_INSN_BUF_SZ];
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};
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struct intel_pt_insn;
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struct intel_pt_buffer {
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const unsigned char *buf;
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size_t len;
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bool consecutive;
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uint64_t ref_timestamp;
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uint64_t trace_nr;
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};
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struct intel_pt_params {
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int (*get_trace)(struct intel_pt_buffer *buffer, void *data);
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int (*walk_insn)(struct intel_pt_insn *intel_pt_insn,
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uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,
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uint64_t max_insn_cnt, void *data);
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bool (*pgd_ip)(uint64_t ip, void *data);
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void *data;
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bool return_compression;
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bool branch_enable;
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uint64_t period;
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enum intel_pt_period_type period_type;
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unsigned max_non_turbo_ratio;
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unsigned int mtc_period;
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uint32_t tsc_ctc_ratio_n;
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uint32_t tsc_ctc_ratio_d;
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};
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struct intel_pt_decoder;
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struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params);
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void intel_pt_decoder_free(struct intel_pt_decoder *decoder);
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const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder);
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unsigned char *intel_pt_find_overlap(unsigned char *buf_a, size_t len_a,
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unsigned char *buf_b, size_t len_b,
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bool have_tsc, bool *consecutive);
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int intel_pt__strerror(int code, char *buf, size_t buflen);
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#endif
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