#include <linux/security.h>
#include <linux/gfp.h>
#include <linux/socket.h>
-#include <linux/compat.h>
#include <linux/sched/signal.h>
#include "internal.h"
* Currently we punt and implement it as a normal copy, see pipe_to_user().
*
*/
-static long do_vmsplice(struct file *f, struct iov_iter *iter, unsigned int flags)
-{
- if (unlikely(flags & ~SPLICE_F_ALL))
- return -EINVAL;
-
- if (!iov_iter_count(iter))
- return 0;
-
- if (iov_iter_rw(iter) == WRITE)
- return vmsplice_to_pipe(f, iter, flags);
- else
- return vmsplice_to_user(f, iter, flags);
-}
-
SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov,
unsigned long, nr_segs, unsigned int, flags)
{
struct fd f;
int type;
+ if (unlikely(flags & ~SPLICE_F_ALL))
+ return -EINVAL;
+
f = fdget(fd);
error = vmsplice_type(f, &type);
if (error)
error = import_iovec(type, uiov, nr_segs,
ARRAY_SIZE(iovstack), &iov, &iter);
- if (error >= 0) {
- error = do_vmsplice(f.file, &iter, flags);
- kfree(iov);
- }
- fdput(f);
- return error;
-}
+ if (error < 0)
+ goto out_fdput;
-#ifdef CONFIG_COMPAT
-COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, iov32,
- unsigned int, nr_segs, unsigned int, flags)
-{
- struct iovec iovstack[UIO_FASTIOV];
- struct iovec *iov = iovstack;
- struct iov_iter iter;
- ssize_t error;
- struct fd f;
- int type;
-
- f = fdget(fd);
- error = vmsplice_type(f, &type);
- if (error)
- return error;
+ if (!iov_iter_count(&iter))
+ error = 0;
+ else if (iov_iter_rw(&iter) == WRITE)
+ error = vmsplice_to_pipe(f.file, &iter, flags);
+ else
+ error = vmsplice_to_user(f.file, &iter, flags);
- error = compat_import_iovec(type, iov32, nr_segs,
- ARRAY_SIZE(iovstack), &iov, &iter);
- if (error >= 0) {
- error = do_vmsplice(f.file, &iter, flags);
- kfree(iov);
- }
+ kfree(iov);
+out_fdput:
fdput(f);
return error;
}
-#endif
SYSCALL_DEFINE6(splice, int, fd_in, loff_t __user *, off_in,
int, fd_out, loff_t __user *, off_out,