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
44 lines
1 KiB
C
44 lines
1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Mapping of DWARF debug register numbers into register names.
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*
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* Copyright IBM Corp. 2010, 2017
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
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* Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
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*
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*/
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#include <errno.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <linux/kernel.h>
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#include <asm/ptrace.h>
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#include <string.h>
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#include <dwarf-regs.h>
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#include "dwarf-regs-table.h"
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const char *get_arch_regstr(unsigned int n)
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{
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return (n >= ARRAY_SIZE(s390_dwarf_regs)) ? NULL : s390_dwarf_regs[n];
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}
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/*
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* Convert the register name into an offset to struct pt_regs (kernel).
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* This is required by the BPF prologue generator. The BPF
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* program is called in the BPF overflow handler in the perf
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* core.
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*/
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int regs_query_register_offset(const char *name)
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{
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unsigned long gpr;
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if (!name || strncmp(name, "%r", 2))
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return -EINVAL;
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errno = 0;
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gpr = strtoul(name + 2, NULL, 10);
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if (errno || gpr >= 16)
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return -EINVAL;
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return offsetof(user_pt_regs, gprs) + 8 * gpr;
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}
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