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Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c68
1 files changed, 46 insertions, 22 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 7a648911246b..8274a794253b 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -515,8 +515,8 @@ SYSCALL_DEFINE3(write, unsigned int, fd, const char __user *, buf,
return ret;
}
-SYSCALL_DEFINE(pread64)(unsigned int fd, char __user *buf,
- size_t count, loff_t pos)
+SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
+ size_t, count, loff_t, pos)
{
struct fd f;
ssize_t ret = -EBADF;
@@ -534,17 +534,9 @@ SYSCALL_DEFINE(pread64)(unsigned int fd, char __user *buf,
return ret;
}
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_pread64(long fd, long buf, long count, loff_t pos)
-{
- return SYSC_pread64((unsigned int) fd, (char __user *) buf,
- (size_t) count, pos);
-}
-SYSCALL_ALIAS(sys_pread64, SyS_pread64);
-#endif
-SYSCALL_DEFINE(pwrite64)(unsigned int fd, const char __user *buf,
- size_t count, loff_t pos)
+SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
+ size_t, count, loff_t, pos)
{
struct fd f;
ssize_t ret = -EBADF;
@@ -562,14 +554,6 @@ SYSCALL_DEFINE(pwrite64)(unsigned int fd, const char __user *buf,
return ret;
}
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_pwrite64(long fd, long buf, long count, loff_t pos)
-{
- return SYSC_pwrite64((unsigned int) fd, (const char __user *) buf,
- (size_t) count, pos);
-}
-SYSCALL_ALIAS(sys_pwrite64, SyS_pwrite64);
-#endif
/*
* Reduce an iovec's length in-place. Return the resulting number of segments
@@ -897,8 +881,8 @@ 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;
@@ -1022,3 +1006,43 @@ 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