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
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/*
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* trace/beauty/cone.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 <sys/types.h>
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#include <uapi/linux/sched.h>
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static size_t clone__scnprintf_flags(unsigned long flags, char *bf, size_t size)
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{
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int printed = 0;
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#define P_FLAG(n) \
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if (flags & CLONE_##n) { \
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printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
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flags &= ~CLONE_##n; \
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}
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P_FLAG(VM);
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P_FLAG(FS);
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P_FLAG(FILES);
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P_FLAG(SIGHAND);
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P_FLAG(PTRACE);
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P_FLAG(VFORK);
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P_FLAG(PARENT);
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P_FLAG(THREAD);
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P_FLAG(NEWNS);
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P_FLAG(SYSVSEM);
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P_FLAG(SETTLS);
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P_FLAG(PARENT_SETTID);
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P_FLAG(CHILD_CLEARTID);
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P_FLAG(DETACHED);
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P_FLAG(UNTRACED);
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P_FLAG(CHILD_SETTID);
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P_FLAG(NEWCGROUP);
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P_FLAG(NEWUTS);
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P_FLAG(NEWIPC);
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P_FLAG(NEWUSER);
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P_FLAG(NEWPID);
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P_FLAG(NEWNET);
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P_FLAG(IO);
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#undef P_FLAG
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if (flags)
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printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
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return printed;
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}
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size_t syscall_arg__scnprintf_clone_flags(char *bf, size_t size, struct syscall_arg *arg)
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{
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unsigned long flags = arg->val;
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enum syscall_clone_args {
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SCC_FLAGS = (1 << 0),
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SCC_CHILD_STACK = (1 << 1),
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SCC_PARENT_TIDPTR = (1 << 2),
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SCC_CHILD_TIDPTR = (1 << 3),
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SCC_TLS = (1 << 4),
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};
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if (!(flags & CLONE_PARENT_SETTID))
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arg->mask |= SCC_PARENT_TIDPTR;
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if (!(flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)))
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arg->mask |= SCC_CHILD_TIDPTR;
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if (!(flags & CLONE_SETTLS))
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arg->mask |= SCC_TLS;
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return clone__scnprintf_flags(flags, bf, size);
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}
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