diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2012-02-19 17:38:00 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-02-20 12:48:47 -0800 |
| commit | 6684ba202b5ab2f36d574c72fe50c207d99b3e35 (patch) | |
| tree | 58f692f4f827bba86120c0af385fb8c768889591 /include/linux/compat.h | |
| parent | 45e877812926c69d643d6274347f79513a4ee934 (diff) | |
compat: Add helper functions to read/write struct timeval, timespec
Add helper functions to read and write struct timeval and struct
timespec from userspace. We already had helper functions for reading
and writing struct compat_timespec; add a set of functions to do the
same with struct timeval, and add a second suite of functions which
can be sensitive to COMPAT_USE_64BIT_TIME and access either 32- or
64-bit time structures.
This also exports these helper functions to modules.
Rename the existing inlines for converting between struct
compat_timeval and native struct timespec so we can have a saner
naming convention for the exported functions.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/linux/compat.h')
| -rw-r--r-- | include/linux/compat.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index 1be91c048249..a82e452bbdb9 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -87,10 +87,26 @@ typedef struct { compat_sigset_word sig[_COMPAT_NSIG_WORDS]; } compat_sigset_t; +/* + * These functions operate strictly on struct compat_time* + */ extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *); extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *); +extern int get_compat_timeval(struct timeval *, + const struct compat_timeval __user *); +extern int put_compat_timeval(const struct timeval *, + struct compat_timeval __user *); +/* + * These functions operate on 32- or 64-bit specs depending on + * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the + * naming as compat_get/put_ rather than get/put_compat_. + */ +extern int compat_get_timespec(struct timespec *, const void __user *); +extern int compat_put_timespec(const struct timespec *, void __user *); +extern int compat_get_timeval(struct timeval *, const void __user *); +extern int compat_put_timeval(const struct timeval *, void __user *); struct compat_iovec { compat_uptr_t iov_base; |