[PATCH v4 9/9] fuse: copy_file_range needs to strip setuid bits and update timestamps

Amir Goldstein
2019-05-31T16:47:28Z

Like ->write_iter(), we update mtime and strip setuid of dst file before
copy and like ->read_iter(), we update atime of src file after copy.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Miklos Szeredi <miklos@szeredi.hu>
---
fs/fuse/file.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 569baf286835..eab00cd089e8 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3131,6 +3131,10 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,

inode_lock(inode_out);

+ err = file_modified(file_out);
+ if (err)
+ goto out;
+
if (fc->writeback_cache) {
err = filemap_write_and_wait_range(inode_out->i_mapping,
pos_out, pos_out + len);
@@ -3172,6 +3176,7 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,
clear_bit(FUSE_I_SIZE_UNSTABLE, &fi_out->state);

inode_unlock(inode_out);
+ file_accessed(file_in);

return err;
}
--
2.17.1