[v4,9/9] fuse: copy_file_range needs to strip setuid bits and update timestamps
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Message ID 20190531164701.15112-10-amir73il@gmail.com
State New
Headers show
Series
  • Fixes for major copy_file_range() issues
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Commit Message

Amir Goldstein May 31, 2019, 4:47 p.m. UTC
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(+)

Patch
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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;
 }