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Diffstat (limited to 'fs/splice.c')
-rw-r--r--fs/splice.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/fs/splice.c b/fs/splice.c
index e6b25598c8c..d37431dd60a 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1274,7 +1274,7 @@ static int direct_splice_actor(struct pipe_inode_info *pipe,
{
struct file *file = sd->u.file;
- return do_splice_from(pipe, file, &file->f_pos, sd->total_len,
+ return do_splice_from(pipe, file, sd->opos, sd->total_len,
sd->flags);
}
@@ -1283,6 +1283,7 @@ static int direct_splice_actor(struct pipe_inode_info *pipe,
* @in: file to splice from
* @ppos: input file offset
* @out: file to splice to
+ * @opos: output file offset
* @len: number of bytes to splice
* @flags: splice modifier flags
*
@@ -1294,7 +1295,7 @@ static int direct_splice_actor(struct pipe_inode_info *pipe,
*
*/
long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
- size_t len, unsigned int flags)
+ loff_t *opos, size_t len, unsigned int flags)
{
struct splice_desc sd = {
.len = len,
@@ -1302,6 +1303,7 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
.flags = flags,
.pos = *ppos,
.u.file = out,
+ .opos = opos,
};
long ret;
@@ -1325,7 +1327,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
{
struct pipe_inode_info *ipipe;
struct pipe_inode_info *opipe;
- loff_t offset, *off;
+ loff_t offset;
long ret;
ipipe = get_pipe_info(in);
@@ -1356,13 +1358,15 @@ static long do_splice(struct file *in, loff_t __user *off_in,
return -EINVAL;
if (copy_from_user(&offset, off_out, sizeof(loff_t)))
return -EFAULT;
- off = &offset;
- } else
- off = &out->f_pos;
+ } else {
+ offset = out->f_pos;
+ }
- ret = do_splice_from(ipipe, out, off, len, flags);
+ ret = do_splice_from(ipipe, out, &offset, len, flags);
- if (off_out && copy_to_user(off_out, off, sizeof(loff_t)))
+ if (!off_out)
+ out->f_pos = offset;
+ else if (copy_to_user(off_out, &offset, sizeof(loff_t)))
ret = -EFAULT;
return ret;
@@ -1376,13 +1380,15 @@ static long do_splice(struct file *in, loff_t __user *off_in,
return -EINVAL;
if (copy_from_user(&offset, off_in, sizeof(loff_t)))
return -EFAULT;
- off = &offset;
- } else
- off = &in->f_pos;
+ } else {
+ offset = in->f_pos;
+ }
- ret = do_splice_to(in, off, opipe, len, flags);
+ ret = do_splice_to(in, &offset, opipe, len, flags);
- if (off_in && copy_to_user(off_in, off, sizeof(loff_t)))
+ if (!off_in)
+ in->f_pos = offset;
+ else if (copy_to_user(off_in, &offset, sizeof(loff_t)))
ret = -EFAULT;
return ret;