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| author | Arnd Bergmann <arnd@arndb.de> | 2019-04-17 22:56:11 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-19 14:07:40 -0700 |
| commit | 0768e17073dc527ccd18ed5f96ce85f9985e9115 (patch) | |
| tree | 4f9898446f998dd34bd56f5329dcc4bbd97f92d5 /arch | |
| parent | 5ce5d8a5a4ae64b281bea7ae028c960f12acae21 (diff) | |
| download | linux-0768e17073dc527ccd18ed5f96ce85f9985e9115.tar.bz2 | |
net: socket: implement 64-bit timestamps
The 'timeval' and 'timespec' data structures used for socket timestamps
are going to be redefined in user space based on 64-bit time_t in future
versions of the C library to deal with the y2038 overflow problem,
which breaks the ABI definition.
Unlike many modern ioctl commands, SIOCGSTAMP and SIOCGSTAMPNS do not
use the _IOR() macro to encode the size of the transferred data, so it
remains ambiguous whether the application uses the old or new layout.
The best workaround I could find is rather ugly: we redefine the command
code based on the size of the respective data structure with a ternary
operator. This lets it get evaluated as late as possible, hopefully after
that structure is visible to the caller. We cannot use an #ifdef here,
because inux/sockios.h might have been included before any libc header
that could determine the size of time_t.
The ioctl implementation now interprets the new command codes as always
referring to the 64-bit structure on all architectures, while the old
architecture specific command code still refers to the old architecture
specific layout. The new command number is only used when they are
actually different.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/alpha/include/uapi/asm/sockios.h | 4 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/sockios.h | 4 | ||||
| -rw-r--r-- | arch/sh/include/uapi/asm/sockios.h | 5 | ||||
| -rw-r--r-- | arch/xtensa/include/uapi/asm/sockios.h | 4 |
4 files changed, 9 insertions, 8 deletions
diff --git a/arch/alpha/include/uapi/asm/sockios.h b/arch/alpha/include/uapi/asm/sockios.h index ba287e4b01bf..af92bc27c3be 100644 --- a/arch/alpha/include/uapi/asm/sockios.h +++ b/arch/alpha/include/uapi/asm/sockios.h @@ -11,7 +11,7 @@ #define SIOCSPGRP _IOW('s', 8, pid_t) #define SIOCGPGRP _IOR('s', 9, pid_t) -#define SIOCGSTAMP 0x8906 /* Get stamp (timeval) */ -#define SIOCGSTAMPNS 0x8907 /* Get stamp (timespec) */ +#define SIOCGSTAMP_OLD 0x8906 /* Get stamp (timeval) */ +#define SIOCGSTAMPNS_OLD 0x8907 /* Get stamp (timespec) */ #endif /* _ASM_ALPHA_SOCKIOS_H */ diff --git a/arch/mips/include/uapi/asm/sockios.h b/arch/mips/include/uapi/asm/sockios.h index 5b40a88593fa..66f60234f290 100644 --- a/arch/mips/include/uapi/asm/sockios.h +++ b/arch/mips/include/uapi/asm/sockios.h @@ -21,7 +21,7 @@ #define SIOCSPGRP _IOW('s', 8, pid_t) #define SIOCGPGRP _IOR('s', 9, pid_t) -#define SIOCGSTAMP 0x8906 /* Get stamp (timeval) */ -#define SIOCGSTAMPNS 0x8907 /* Get stamp (timespec) */ +#define SIOCGSTAMP_OLD 0x8906 /* Get stamp (timeval) */ +#define SIOCGSTAMPNS_OLD 0x8907 /* Get stamp (timespec) */ #endif /* _ASM_SOCKIOS_H */ diff --git a/arch/sh/include/uapi/asm/sockios.h b/arch/sh/include/uapi/asm/sockios.h index 17313d2c3527..ef18a668456d 100644 --- a/arch/sh/include/uapi/asm/sockios.h +++ b/arch/sh/include/uapi/asm/sockios.h @@ -10,6 +10,7 @@ #define SIOCSPGRP _IOW('s', 8, pid_t) #define SIOCGPGRP _IOR('s', 9, pid_t) -#define SIOCGSTAMP _IOR('s', 100, struct timeval) /* Get stamp (timeval) */ -#define SIOCGSTAMPNS _IOR('s', 101, struct timespec) /* Get stamp (timespec) */ +#define SIOCGSTAMP_OLD _IOR('s', 100, struct timeval) /* Get stamp (timeval) */ +#define SIOCGSTAMPNS_OLD _IOR('s', 101, struct timespec) /* Get stamp (timespec) */ + #endif /* __ASM_SH_SOCKIOS_H */ diff --git a/arch/xtensa/include/uapi/asm/sockios.h b/arch/xtensa/include/uapi/asm/sockios.h index fb8ac3607189..1a1f58f4b75a 100644 --- a/arch/xtensa/include/uapi/asm/sockios.h +++ b/arch/xtensa/include/uapi/asm/sockios.h @@ -26,7 +26,7 @@ #define SIOCSPGRP _IOW('s', 8, pid_t) #define SIOCGPGRP _IOR('s', 9, pid_t) -#define SIOCGSTAMP 0x8906 /* Get stamp (timeval) */ -#define SIOCGSTAMPNS 0x8907 /* Get stamp (timespec) */ +#define SIOCGSTAMP_OLD 0x8906 /* Get stamp (timeval) */ +#define SIOCGSTAMPNS_OLD 0x8907 /* Get stamp (timespec) */ #endif /* _XTENSA_SOCKIOS_H */ |