Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[powerpc.git] / fs / compat.c

diff --git a/fs/compat.c b/fs/compat.c
index 9f6248d..4db6216 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -46,6 +46,7 @@
 #include <linux/tsacct_kern.h>
 #include <linux/security.h>
 #include <linux/highmem.h>
+#include <linux/signal.h>
 #include <linux/poll.h>
 #include <linux/mm.h>
 #include <linux/eventpoll.h>
@@ -77,30 +78,57 @@ int compat_printk(const char *fmt, ...)
  */
 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
 {
-       struct timeval tv[2];
+       struct timespec tv[2];
 
        if (t) {
                if (get_user(tv[0].tv_sec, &t->actime) ||
                    get_user(tv[1].tv_sec, &t->modtime))
                        return -EFAULT;
-               tv[0].tv_usec = 0;
-               tv[1].tv_usec = 0;
+               tv[0].tv_nsec = 0;
+               tv[1].tv_nsec = 0;
        }
-       return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
+       return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
+}
+
+asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags)
+{
+       struct timespec tv[2];
+
+       if  (t) {
+               if (get_compat_timespec(&tv[0], &t[0]) ||
+                   get_compat_timespec(&tv[1], &t[1]))
+                       return -EFAULT;
+
+               if ((tv[0].tv_nsec == UTIME_OMIT || tv[0].tv_nsec == UTIME_NOW)
+                   && tv[0].tv_sec != 0)
+                       return -EINVAL;
+               if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW)
+                   && tv[1].tv_sec != 0)
+                       return -EINVAL;
+
+               if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
+                       return 0;
+       }
+       return do_utimes(dfd, filename, t ? tv : NULL, flags);
 }
 
 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
 {
-       struct timeval tv[2];
+       struct timespec tv[2];
 
        if (t) {
                if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
-                   get_user(tv[0].tv_usec, &t[0].tv_usec) ||
+                   get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
                    get_user(tv[1].tv_sec, &t[1].tv_sec) ||
-                   get_user(tv[1].tv_usec, &t[1].tv_usec))
+                   get_user(tv[1].tv_nsec, &t[1].tv_usec))
                        return -EFAULT;
+               if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
+                   tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
+                       return -EINVAL;
+               tv[0].tv_nsec *= 1000;
+               tv[1].tv_nsec *= 1000;
        }
-       return do_utimes(dfd, filename, t ? tv : NULL);
+       return do_utimes(dfd, filename, t ? tv : NULL, 0);
 }
 
 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
@@ -1516,9 +1544,10 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp,
        compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
 {
        fd_set_bits fds;
-       char *bits;
+       void *bits;
        int size, max_fds, ret = -EINVAL;
        struct fdtable *fdt;
+       long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
 
        if (n < 0)
                goto out_nofds;
@@ -1536,11 +1565,14 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp,
         * since we used fdset we need to allocate memory in units of
         * long-words.
         */
-       ret = -ENOMEM;
        size = FDS_BYTES(n);
-       bits = kmalloc(6 * size, GFP_KERNEL);
-       if (!bits)
-               goto out_nofds;
+       bits = stack_fds;
+       if (size > sizeof(stack_fds) / 6) {
+               bits = kmalloc(6 * size, GFP_KERNEL);
+               ret = -ENOMEM;
+               if (!bits)
+                       goto out_nofds;
+       }
        fds.in      = (unsigned long *)  bits;
        fds.out     = (unsigned long *) (bits +   size);
        fds.ex      = (unsigned long *) (bits + 2*size);
@@ -1572,7 +1604,8 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp,
            compat_set_fd_set(n, exp, fds.res_ex))
                ret = -EFAULT;
 out:
-       kfree(bits);
+       if (bits != stack_fds)
+               kfree(bits);
 out_nofds:
        return ret;
 }
@@ -2172,3 +2205,46 @@ asmlinkage long compat_sys_epoll_pwait(int epfd,
 #endif /* TIF_RESTORE_SIGMASK */
 
 #endif /* CONFIG_EPOLL */
+
+#ifdef CONFIG_SIGNALFD
+
+asmlinkage long compat_sys_signalfd(int ufd,
+                                   const compat_sigset_t __user *sigmask,
+                                   compat_size_t sigsetsize)
+{
+       compat_sigset_t ss32;
+       sigset_t tmp;
+       sigset_t __user *ksigmask;
+
+       if (sigsetsize != sizeof(compat_sigset_t))
+               return -EINVAL;
+       if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+               return -EFAULT;
+       sigset_from_compat(&tmp, &ss32);
+       ksigmask = compat_alloc_user_space(sizeof(sigset_t));
+       if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
+               return -EFAULT;
+
+       return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
+}
+
+#endif /* CONFIG_SIGNALFD */
+
+#ifdef CONFIG_TIMERFD
+
+asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
+                                  const struct compat_itimerspec __user *utmr)
+{
+       struct itimerspec t;
+       struct itimerspec __user *ut;
+
+       if (get_compat_itimerspec(&t, utmr))
+               return -EFAULT;
+       ut = compat_alloc_user_space(sizeof(*ut));
+       if (copy_to_user(ut, &t, sizeof(t)))
+               return -EFAULT;
+
+       return sys_timerfd(ufd, clockid, flags, ut);
+}
+
+#endif /* CONFIG_TIMERFD */