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| author | Eric W. Biederman <ebiederm@xmission.com> | 2011-10-17 22:40:02 +0200 |
|---|---|---|
| committer | root <root@serles.lst.de> | 2011-10-28 14:58:53 +0200 |
| commit | 1448c721e4fa2faf742029a0403b4b787fccb7fa (patch) | |
| tree | f79332dccc85550b4c16510840850e11115cfff0 /arch/mips | |
| parent | vfs: add "device" tag to /proc/self/mountstats (diff) | |
| download | linux-1448c721e4fa2faf742029a0403b4b787fccb7fa.tar.xz linux-1448c721e4fa2faf742029a0403b4b787fccb7fa.zip | |
compat: sync compat_stats with statfs.
This was found by inspection while tracking a similar
bug in compat_statfs64, that has been fixed in mainline
since decemeber.
- This fixes a bug where not all of the f_spare fields
were cleared on mips and s390.
- Add the f_flags field to struct compat_statfs
- Copy f_flags to userspace in case someone cares.
- Use __clear_user to copy the f_spare field to userspace
to ensure that all of the elements of f_spare are cleared.
On some architectures f_spare is has 5 ints and on some
architectures f_spare only has 4 ints. Which makes
the previous technique of clearing each int individually
broken.
I don't expect anyone actually uses the old statfs system
call anymore but if they do let them benefit from having
the compat and the native version working the same.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/compat.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/include/asm/compat.h b/arch/mips/include/asm/compat.h index dbc51065df5b..b77df0366ee6 100644 --- a/arch/mips/include/asm/compat.h +++ b/arch/mips/include/asm/compat.h @@ -111,7 +111,8 @@ struct compat_statfs { int f_bavail; compat_fsid_t f_fsid; int f_namelen; - int f_spare[6]; + int f_flags; + int f_spare[5]; }; #define COMPAT_RLIM_INFINITY 0x7fffffffUL |