From 1a060ba3c862bfc03e35112ff3a1434acb6de8e8 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 8 Apr 2017 18:04:59 -0400
Subject: utimes: move compat syscalls from compat.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/utimes.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 61 insertions(+), 5 deletions(-)

(limited to 'fs/utimes.c')

diff --git a/fs/utimes.c b/fs/utimes.c
index 32b15b3f6629..6571d8c848a0 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -1,14 +1,10 @@
-#include <linux/compiler.h>
 #include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/linkage.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
-#include <linux/sched.h>
-#include <linux/stat.h>
 #include <linux/utime.h>
 #include <linux/syscalls.h>
 #include <linux/uaccess.h>
+#include <linux/compat.h>
 #include <asm/unistd.h>
 
 #ifdef __ARCH_WANT_SYS_UTIME
@@ -219,3 +215,63 @@ SYSCALL_DEFINE2(utimes, char __user *, filename,
 {
 	return sys_futimesat(AT_FDCWD, filename, utimes);
 }
+
+#ifdef CONFIG_COMPAT
+/*
+ * Not all architectures have sys_utime, so implement this in terms
+ * of sys_utimes.
+ */
+COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
+		       struct compat_utimbuf __user *, t)
+{
+	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_nsec = 0;
+		tv[1].tv_nsec = 0;
+	}
+	return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
+}
+
+COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct compat_timespec __user *, t, int, flags)
+{
+	struct timespec tv[2];
+
+	if  (t) {
+		if (compat_get_timespec(&tv[0], &t[0]) ||
+		    compat_get_timespec(&tv[1], &t[1]))
+			return -EFAULT;
+
+		if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
+			return 0;
+	}
+	return do_utimes(dfd, filename, t ? tv : NULL, flags);
+}
+
+COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t)
+{
+	struct timespec tv[2];
+
+	if (t) {
+		if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
+		    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_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, 0);
+}
+
+COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t)
+{
+	return compat_sys_futimesat(AT_FDCWD, filename, t);
+}
+#endif
-- 
cgit