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| author | Kawai, Hidehiro <hidehiro.kawai.ez@hitachi.com> | 2007-07-19 01:48:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 10:04:46 -0700 |
| commit | 6c5d523826dc639df709ed0f88c5d2ce25379652 (patch) | |
| tree | ef2fa8cb30266b3a9b047902794e78c583b099da /include/linux/sched.h | |
| parent | 76fdbb25f963de5dc1e308325f0578a2f92b1c2d (diff) | |
| download | linux-6c5d523826dc639df709ed0f88c5d2ce25379652.tar.gz linux-6c5d523826dc639df709ed0f88c5d2ce25379652.tar.bz2 linux-6c5d523826dc639df709ed0f88c5d2ce25379652.zip | |
coredump masking: reimplementation of dumpable using two flags
This patch changes mm_struct.dumpable to a pair of bit flags.
set_dumpable() converts three-value dumpable to two flags and stores it into
lower two bits of mm_struct.flags instead of mm_struct.dumpable.
get_dumpable() behaves in the opposite way.
[akpm@linux-foundation.org: export set_dumpable]
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 731edaca8ffd..8dbd08366400 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -345,6 +345,13 @@ typedef unsigned long mm_counter_t; (mm)->hiwater_vm = (mm)->total_vm; \ } while (0) +extern void set_dumpable(struct mm_struct *mm, int value); +extern int get_dumpable(struct mm_struct *mm); + +/* mm flags */ +#define MMF_DUMPABLE 0 /* core dump is permitted */ +#define MMF_DUMP_SECURELY 1 /* core file is readable only by root */ + struct mm_struct { struct vm_area_struct * mmap; /* list of VMAs */ struct rb_root mm_rb; @@ -402,7 +409,7 @@ struct mm_struct { unsigned int token_priority; unsigned int last_interval; - unsigned char dumpable:2; + unsigned long flags; /* Must use atomic bitops to access the bits */ /* coredumping support */ int core_waiters; |