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
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* Mapping of DWARF debug register numbers into register names.
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*
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* Copyright (C) 2010 Ian Munsie, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stddef.h>
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#include <errno.h>
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#include <string.h>
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#include <dwarf-regs.h>
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#include <linux/ptrace.h>
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#include <linux/kernel.h>
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#include <linux/stringify.h>
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#include "util.h"
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struct pt_regs_dwarfnum {
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const char *name;
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unsigned int dwarfnum;
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unsigned int ptregs_offset;
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};
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#define REG_DWARFNUM_NAME(r, num) \
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{.name = __stringify(%)__stringify(r), .dwarfnum = num, \
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.ptregs_offset = offsetof(struct pt_regs, r)}
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#define GPR_DWARFNUM_NAME(num) \
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{.name = __stringify(%gpr##num), .dwarfnum = num, \
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.ptregs_offset = offsetof(struct pt_regs, gpr[num])}
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#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0, .ptregs_offset = 0}
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/*
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* Reference:
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* http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html
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*/
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static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
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GPR_DWARFNUM_NAME(0),
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GPR_DWARFNUM_NAME(1),
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GPR_DWARFNUM_NAME(2),
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GPR_DWARFNUM_NAME(3),
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GPR_DWARFNUM_NAME(4),
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GPR_DWARFNUM_NAME(5),
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GPR_DWARFNUM_NAME(6),
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GPR_DWARFNUM_NAME(7),
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GPR_DWARFNUM_NAME(8),
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GPR_DWARFNUM_NAME(9),
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GPR_DWARFNUM_NAME(10),
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GPR_DWARFNUM_NAME(11),
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GPR_DWARFNUM_NAME(12),
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GPR_DWARFNUM_NAME(13),
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GPR_DWARFNUM_NAME(14),
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GPR_DWARFNUM_NAME(15),
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GPR_DWARFNUM_NAME(16),
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GPR_DWARFNUM_NAME(17),
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GPR_DWARFNUM_NAME(18),
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GPR_DWARFNUM_NAME(19),
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GPR_DWARFNUM_NAME(20),
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GPR_DWARFNUM_NAME(21),
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GPR_DWARFNUM_NAME(22),
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GPR_DWARFNUM_NAME(23),
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GPR_DWARFNUM_NAME(24),
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GPR_DWARFNUM_NAME(25),
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GPR_DWARFNUM_NAME(26),
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GPR_DWARFNUM_NAME(27),
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GPR_DWARFNUM_NAME(28),
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GPR_DWARFNUM_NAME(29),
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GPR_DWARFNUM_NAME(30),
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GPR_DWARFNUM_NAME(31),
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REG_DWARFNUM_NAME(msr, 66),
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REG_DWARFNUM_NAME(ctr, 109),
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REG_DWARFNUM_NAME(link, 108),
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REG_DWARFNUM_NAME(xer, 101),
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REG_DWARFNUM_NAME(dar, 119),
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REG_DWARFNUM_NAME(dsisr, 118),
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REG_DWARFNUM_END,
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};
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/**
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* get_arch_regstr() - lookup register name from it's DWARF register number
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* @n: the DWARF register number
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*
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* get_arch_regstr() returns the name of the register in struct
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* regdwarfnum_table from it's DWARF register number. If the register is not
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* found in the table, this returns NULL;
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*/
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const char *get_arch_regstr(unsigned int n)
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{
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const struct pt_regs_dwarfnum *roff;
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for (roff = regdwarfnum_table; roff->name != NULL; roff++)
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if (roff->dwarfnum == n)
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return roff->name;
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return NULL;
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}
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int regs_query_register_offset(const char *name)
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{
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const struct pt_regs_dwarfnum *roff;
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for (roff = regdwarfnum_table; roff->name != NULL; roff++)
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if (!strcmp(roff->name, name))
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return roff->ptregs_offset;
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return -EINVAL;
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}
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