syscalls/vmsplice.c

   1 /*
   2  * SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, iov,
   3          unsigned long, nr_segs, unsigned int, flags)
   4  */
   5
   6 #include <fcntl.h>
   7 #include <sys/uio.h>
   8 #include <stdlib.h>
   9 #include "sanitise.h"
  10 #include "shm.h"
  11
  12 static void sanitise_vmsplice(int childno)
  13 {
  14         if ((rand() % 10) > 0)
  15                 shm->syscall[childno].a1 = shm->pipe_fds[rand() % MAX_PIPE_FDS];
  16         shm->syscall[childno].a3 = rand() % UIO_MAXIOV;
  17 }
  18
  19 struct syscallentry syscall_vmsplice = {
  20         .name = "vmsplice",
  21         .num_args = 4,
  22         .sanitise = sanitise_vmsplice,
  23         .arg1name = "fd",
  24         .arg1type = ARG_FD,
  25         .arg2name = "iov",
  26         .arg2type = ARG_IOVEC,
  27         .arg3name = "nr_segs",
  28         .arg3type = ARG_IOVECLEN,
  29         .arg4name = "flags",
  30         .arg4type = ARG_LIST,
  31         .arg4list = {
  32                 .num = 4,
  33                 .values = { SPLICE_F_MOVE, SPLICE_F_NONBLOCK, SPLICE_F_MORE, SPLICE_F_GIFT },
  34         },
  35         .group = GROUP_VM,
  36         .flags = NEED_ALARM,
  37 };