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author | jhb <jhb@FreeBSD.org> | 2013-09-19 18:53:42 +0000 |
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committer | jhb <jhb@FreeBSD.org> | 2013-09-19 18:53:42 +0000 |
commit | d3ef75b6c79e9e6d642efa9c32a96524d7a5a5b7 (patch) | |
tree | 56c7a97f082d488a8b917c2d2d52956076373329 /sys/sys/procctl.h | |
parent | 8ecfe4666e7be9cea4cf6c3ef929de2e8d286f41 (diff) | |
download | FreeBSD-src-d3ef75b6c79e9e6d642efa9c32a96524d7a5a5b7.zip FreeBSD-src-d3ef75b6c79e9e6d642efa9c32a96524d7a5a5b7.tar.gz |
Extend the support for exempting processes from being killed when swap is
exhausted.
- Add a new protect(1) command that can be used to set or revoke protection
from arbitrary processes. Similar to ktrace it can apply a change to all
existing descendants of a process as well as future descendants.
- Add a new procctl(2) system call that provides a generic interface for
control operations on processes (as opposed to the debugger-specific
operations provided by ptrace(2)). procctl(2) uses a combination of
idtype_t and an id to identify the set of processes on which to operate
similar to wait6().
- Add a PROC_SPROTECT control operation to manage the protection status
of a set of processes. MADV_PROTECT still works for backwards
compatability.
- Add a p_flag2 to struct proc (and a corresponding ki_flag2 to kinfo_proc)
the first bit of which is used to track if P_PROTECT should be inherited
by new child processes.
Reviewed by: kib, jilles (earlier version)
Approved by: re (delphij)
MFC after: 1 month
Diffstat (limited to 'sys/sys/procctl.h')
-rw-r--r-- | sys/sys/procctl.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sys/sys/procctl.h b/sys/sys/procctl.h new file mode 100644 index 0000000..ff577c0 --- /dev/null +++ b/sys/sys/procctl.h @@ -0,0 +1,55 @@ +/*- + * Copyright (c) 2013 Advanced Computing Technologies LLC + * Written by: John H. Baldwin <jhb@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _SYS_PROCCTL_H_ +#define _SYS_PROCCTL_H_ + +#define PROC_SPROTECT 1 /* set protected state */ + +/* Operations for PROC_SPROTECT (passed in integer arg). */ +#define PPROT_OP(x) ((x) & 0xf) +#define PPROT_SET 1 +#define PPROT_CLEAR 2 + +/* Flags for PROC_SPROTECT (ORed in with operation). */ +#define PPROT_FLAGS(x) ((x) & ~0xf) +#define PPROT_DESCEND 0x10 +#define PPROT_INHERIT 0x20 + +#ifndef _KERNEL +#include <sys/types.h> +#include <sys/wait.h> + +__BEGIN_DECLS +int procctl(idtype_t, id_t, int, void *); +__END_DECLS + +#endif + +#endif /* !_SYS_PROCCTL_H_ */ |