diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/recvmmsg.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/recvmmsg.c | 61 |
1 files changed, 39 insertions, 22 deletions
diff --git a/sysdeps/unix/sysv/linux/recvmmsg.c b/sysdeps/unix/sysv/linux/recvmmsg.c index bf18260b46..08b89ba962 100644 --- a/sysdeps/unix/sysv/linux/recvmmsg.c +++ b/sysdeps/unix/sysv/linux/recvmmsg.c @@ -16,12 +16,10 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#include <errno.h> #include <sys/socket.h> - +#include <socketcall.h> #include <sysdep-cancel.h> -#include <sys/syscall.h> -#include <kernel-features.h> +#include <shlib-compat.h> /* Do not use the recvmmsg syscall on socketcall architectures unless it was added at the same time as the socketcall support or can be @@ -32,31 +30,39 @@ # undef __NR_recvmmsg #endif -#ifdef __NR_recvmmsg +static inline void +adjust_mmsghdr (struct mmsghdr *vmessages, unsigned int vlen) +{ +#if __WORDSIZE == 64 + /* POSIX specifies that both msghdr::msg_iovlen and msghdr::msg_controllen + to be int and socklen_t respectively. However Linux defines it as + both size_t. So for 64-bit it requires some adjustments by zeroing + the pad fields. */ + struct mmsghdr *vmhdr = vmessages; + for (unsigned int i = 0; i != 0; i--, vmhdr++) + { + vmhdr->msg_hdr.__glibc_reserved1 = 0; + vmhdr->msg_hdr.__glibc_reserved2 = 0; + } +#endif +} + int -recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags, - struct timespec *tmo) +__recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, + int flags, struct timespec *tmo) { +#ifdef __NR_recvmmsg + adjust_mmsghdr (vmessages, vlen); return SYSCALL_CANCEL (recvmmsg, fd, vmessages, vlen, flags, tmo); -} #elif defined __NR_socketcall -# include <socketcall.h> # ifdef __ASSUME_RECVMMSG_SOCKETCALL -int -recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags, - struct timespec *tmo) -{ + adjust_mmsghdr (vmessages, vlen); return SOCKETCALL_CANCEL (recvmmsg, fd, vmessages, vlen, flags, tmo); -} # else -static int have_recvmmsg; - -int -recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags, - struct timespec *tmo) -{ + static int have_recvmmsg; if (__glibc_likely (have_recvmmsg >= 0)) { + adjust_mmsghdr (vmessages, vlen); int ret = SOCKETCALL_CANCEL (recvmmsg, fd, vmessages, vlen, flags, tmo); /* The kernel returns -EINVAL for unknown socket operations. @@ -86,8 +92,19 @@ recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags, } __set_errno (ENOSYS); return -1; -} # endif /* __ASSUME_RECVMMSG_SOCKETCALL */ #else -# include <socket/recvmmsg.c> +# define STUB 1 + __set_errno (ENOSYS); + return -1; +#endif +} +#ifdef STUB +stub_warning (recvmmsg) +#endif + +#if __WORDSIZE == 64 +versioned_symbol (libc, __recvmmsg, recvmmsg, GLIBC_2_24); +#else +weak_alias (__recvmmsg, recvmmsg) #endif |