sfc: fix return value check in efx_ptp_probe_channel()

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / splice.c

diff --git a/fs/splice.c b/fs/splice.c
index 718bd0056384688af6ead056156574638c0be6e9..e6b25598c8c413d66026f96e6d6d1b351e28b62c 100644 (file)
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -31,6 +31,8 @@
 #include <linux/security.h>
 #include <linux/gfp.h>
 #include <linux/socket.h>
+#include <linux/compat.h>
+#include "internal.h"
 
 /*
  * Attempt to steal a page from a pipe buffer. This should perhaps go into
@@ -217,7 +219,7 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
                        page_nr++;
                        ret += buf->len;
 
-                       if (pipe->inode)
+                       if (pipe->files)
                                do_wakeup = 1;
 
                        if (!--spd->nr_pages)
@@ -827,7 +829,7 @@ int splice_from_pipe_feed(struct pipe_inode_info *pipe, struct splice_desc *sd,
                        ops->release(pipe, buf);
                        pipe->curbuf = (pipe->curbuf + 1) & (pipe->buffers - 1);
                        pipe->nrbufs--;
-                       if (pipe->inode)
+                       if (pipe->files)
                                sd->need_wakeup = true;
                }
 
@@ -999,8 +1001,6 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
        };
        ssize_t ret;
 
-       sb_start_write(inode->i_sb);
-
        pipe_lock(pipe);
 
        splice_from_pipe_begin(&sd);
@@ -1036,7 +1036,6 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
                        *ppos += ret;
                balance_dirty_pages_ratelimited(mapping);
        }
-       sb_end_write(inode->i_sb);
 
        return ret;
 }
@@ -1048,9 +1047,10 @@ static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 {
        int ret;
        void *data;
+       loff_t tmp = sd->pos;
 
        data = buf->ops->map(pipe, buf, 0);
-       ret = kernel_write(sd->u.file, data + buf->offset, sd->len, sd->pos);
+       ret = __kernel_write(sd->u.file, data + buf->offset, sd->len, &tmp);
        buf->ops->unmap(pipe, buf, data);
 
        return ret;
@@ -1115,7 +1115,10 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
        else
                splice_write = default_file_splice_write;
 
-       return splice_write(pipe, out, ppos, len, flags);
+       file_start_write(out);
+       ret = splice_write(pipe, out, ppos, len, flags);
+       file_end_write(out);
+       return ret;
 }
 
 /*
@@ -1181,7 +1184,7 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd,
         */
        pipe = current->splice_pipe;
        if (unlikely(!pipe)) {
-               pipe = alloc_pipe_info(NULL);
+               pipe = alloc_pipe_info();
                if (!pipe)
                        return -ENOMEM;
 
@@ -1688,6 +1691,27 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, iov,
        return error;
 }
 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, iov32,
+                   unsigned int, nr_segs, unsigned int, flags)
+{
+       unsigned i;
+       struct iovec __user *iov;
+       if (nr_segs > UIO_MAXIOV)
+               return -EINVAL;
+       iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
+       for (i = 0; i < nr_segs; i++) {
+               struct compat_iovec v;
+               if (get_user(v.iov_base, &iov32[i].iov_base) ||
+                   get_user(v.iov_len, &iov32[i].iov_len) ||
+                   put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
+                   put_user(v.iov_len, &iov[i].iov_len))
+                       return -EFAULT;
+       }
+       return sys_vmsplice(fd, iov, nr_segs, flags);
+}
+#endif
+
 SYSCALL_DEFINE6(splice, int, fd_in, loff_t __user *, off_in,
                int, fd_out, loff_t __user *, off_out,
                size_t, len, unsigned int, flags)