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authorAl Viro <viro@zeniv.linux.org.uk>2013-02-24 02:17:03 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2013-03-03 22:58:46 -0500
commit19f4fc3aee180000fe45952691bbe69dde1d9e95 (patch)
tree195578ae347797f6aeb66f237aeea7e0eae9847c /fs/read_write.c
parent7d197ed4a68e76000070979563051e08bf6fc0aa (diff)
downloadlwn-19f4fc3aee180000fe45952691bbe69dde1d9e95.tar.gz
lwn-19f4fc3aee180000fe45952691bbe69dde1d9e95.zip
convert sendfile{,64} to COMPAT_SYSCALL_DEFINE
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c44
1 files changed, 42 insertions, 2 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index dcfd58d95f44..f738e4dccfab 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -853,8 +853,8 @@ SYSCALL_DEFINE5(pwritev, unsigned long, fd, const struct iovec __user *, vec,
return ret;
}
-ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count,
- loff_t max)
+static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
+ size_t count, loff_t max)
{
struct fd in, out;
struct inode *in_inode, *out_inode;
@@ -978,3 +978,43 @@ SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, si
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}
+
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd,
+ compat_off_t __user *, offset, compat_size_t, count)
+{
+ loff_t pos;
+ off_t off;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(get_user(off, offset)))
+ return -EFAULT;
+ pos = off;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+
+COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
+ compat_loff_t __user *, offset, compat_size_t, count)
+{
+ loff_t pos;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
+ return -EFAULT;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+#endif