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7c72ef6f55
Implement virProcessRunInMountNamespace, which runs callback of type virProcessNamespaceCallback in a container namespace. This uses a child process to run the callback, since you can't change the mount namespace of a thread. This implies that callbacks have to be careful about what code they run due to async safety rules. Idea by Dan Berrange, based on an initial report by Reco <recoverym4n@gmail.com> at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=732394 Signed-off-by: Daniel Berrange <berrange@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
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* virprocess.h: interaction with processes
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*
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* Copyright (C) 2010-2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __VIR_PROCESS_H__
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# define __VIR_PROCESS_H__
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# include <sys/types.h>
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# include "internal.h"
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# include "virbitmap.h"
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char *
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virProcessTranslateStatus(int status);
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void
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virProcessAbort(pid_t pid);
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int
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virProcessWait(pid_t pid, int *exitstatus)
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ATTRIBUTE_RETURN_CHECK;
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int virProcessKill(pid_t pid, int sig);
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int virProcessKillPainfully(pid_t pid, bool force);
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int virProcessSetAffinity(pid_t pid, virBitmapPtr map);
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int virProcessGetAffinity(pid_t pid,
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virBitmapPtr *map,
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int maxcpu);
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int virProcessGetStartTime(pid_t pid,
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unsigned long long *timestamp);
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int virProcessGetNamespaces(pid_t pid,
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size_t *nfdlist,
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int **fdlist);
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int virProcessSetNamespaces(size_t nfdlist,
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int *fdlist);
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int virProcessSetMaxMemLock(pid_t pid, unsigned long long bytes);
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int virProcessSetMaxProcesses(pid_t pid, unsigned int procs);
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int virProcessSetMaxFiles(pid_t pid, unsigned int files);
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/* Callback to run code within the mount namespace tied to the given
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* pid. This function must use only async-signal-safe functions, as
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* it gets run after a fork of a multi-threaded process. The return
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* value of this function is passed to _exit(), except that a
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* negative value is treated as an error. */
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typedef int (*virProcessNamespaceCallback)(pid_t pid, void *opaque);
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int virProcessRunInMountNamespace(pid_t pid,
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virProcessNamespaceCallback cb,
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void *opaque);
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#endif /* __VIR_PROCESS_H__ */
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