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
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/*
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* trace/beauty/prctl.c
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*
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* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "trace/beauty/beauty.h"
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#include <linux/kernel.h>
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#include <uapi/linux/prctl.h>
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#include "trace/beauty/generated/prctl_option_array.c"
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static size_t prctl__scnprintf_option(int option, char *bf, size_t size)
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{
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static DEFINE_STRARRAY(prctl_options);
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return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", option);
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}
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static size_t prctl__scnprintf_set_mm(int option, char *bf, size_t size)
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{
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static DEFINE_STRARRAY(prctl_set_mm_options);
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return strarray__scnprintf(&strarray__prctl_set_mm_options, bf, size, "%d", option);
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}
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size_t syscall_arg__scnprintf_prctl_arg2(char *bf, size_t size, struct syscall_arg *arg)
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{
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int option = syscall_arg__val(arg, 0);
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if (option == PR_SET_MM)
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return prctl__scnprintf_set_mm(arg->val, bf, size);
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/*
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* We still don't grab the contents of pointers on entry or exit,
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* so just print them as hex numbers
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*/
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if (option == PR_SET_NAME)
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return syscall_arg__scnprintf_hex(bf, size, arg);
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return syscall_arg__scnprintf_long(bf, size, arg);
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}
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size_t syscall_arg__scnprintf_prctl_arg3(char *bf, size_t size, struct syscall_arg *arg)
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{
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int option = syscall_arg__val(arg, 0);
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if (option == PR_SET_MM)
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return syscall_arg__scnprintf_hex(bf, size, arg);
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return syscall_arg__scnprintf_long(bf, size, arg);
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}
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size_t syscall_arg__scnprintf_prctl_option(char *bf, size_t size, struct syscall_arg *arg)
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{
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unsigned long option = arg->val;
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enum {
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SPO_ARG2 = (1 << 1),
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SPO_ARG3 = (1 << 2),
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SPO_ARG4 = (1 << 3),
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SPO_ARG5 = (1 << 4),
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SPO_ARG6 = (1 << 5),
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};
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const u8 all_but2 = SPO_ARG3 | SPO_ARG4 | SPO_ARG5 | SPO_ARG6;
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const u8 all = SPO_ARG2 | all_but2;
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const u8 masks[] = {
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[PR_GET_DUMPABLE] = all,
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[PR_SET_DUMPABLE] = all_but2,
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[PR_SET_NAME] = all_but2,
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[PR_GET_CHILD_SUBREAPER] = all_but2,
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[PR_SET_CHILD_SUBREAPER] = all_but2,
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[PR_GET_SECUREBITS] = all,
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[PR_SET_SECUREBITS] = all_but2,
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[PR_SET_MM] = SPO_ARG4 | SPO_ARG5 | SPO_ARG6,
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[PR_GET_PDEATHSIG] = all,
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[PR_SET_PDEATHSIG] = all_but2,
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};
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if (option < ARRAY_SIZE(masks))
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arg->mask |= masks[option];
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return prctl__scnprintf_option(option, bf, size);
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}
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