On Thu, May 30, 2024 at 10:05 PM Sasha Levin sashal@kernel.org wrote:

This is a note to let you know that I've just added the patch titled

ovl: add helper ovl_file_modified()

to the 6.6-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: ovl-add-helper-ovl_file_modified.patch and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

commit f87db32c0cdadc7eea4a37560867da0bd0bb87e8 Author: Amir Goldstein amir73il@gmail.com Date: Wed Sep 27 13:43:44 2023 +0300

ovl: add helper ovl_file_modified()

[ Upstream commit c002728f608183449673818076380124935e6b9b ]

A simple wrapper for updating ovl inode size/mtime, to conform
with ovl_file_accessed().

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Stable-dep-of: 7c98f7cb8fda ("remove call_{read,write}_iter() functions")
Signed-off-by: Sasha Levin <sashal@kernel.org>

No objection to this patch, except for the fact that I think it is not in the best interest of the stable tree to backport 7c98f7cb8fda as is.

I suggest that you consider backporting only the parts of 7c98f7cb8fda that open code call_{read,write}_iter() in call sites (some or all), if you need those as dependencies but actually leave the wrappers in the stable tree.

If the bots selected 7c98f7cb8fda to stable because of the Fixes: tag, then I think that Fixes: tag was misleading the stable bots in this case.

Thanks, Amir.

diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 8be4dc050d1ed..9fd88579bfbfb 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -235,6 +235,12 @@ static loff_t ovl_llseek(struct file *file, loff_t offset, int whence) return ret; }

+static void ovl_file_modified(struct file *file) +{

•   /* Update size/mtime */
  

•   ovl_copyattr(file_inode(file));
  

+}

static void ovl_file_accessed(struct file *file) { struct inode *inode, *upperinode; @@ -290,10 +296,8 @@ static void ovl_aio_cleanup_handler(struct ovl_aio_req *aio_req) struct kiocb *orig_iocb = aio_req->orig_iocb;

    if (iocb->ki_flags & IOCB_WRITE) {

•           struct inode *inode = file_inode(orig_iocb->ki_filp);
  

•           kiocb_end_write(iocb);
  

•           ovl_copyattr(inode);
  

•           ovl_file_modified(orig_iocb->ki_filp);
    }
  
    orig_iocb->ki_pos = iocb->ki_pos;
  

@@ -403,7 +407,7 @@ static ssize_t ovl_write_iter(struct kiocb *iocb, struct iov_iter *iter) ovl_iocb_to_rwf(ifl)); file_end_write(real.file); /* Update size */

•           ovl_copyattr(inode);
  

•           ovl_file_modified(file);
    } else {
            struct ovl_aio_req *aio_req;
  
  

@@ -489,7 +493,7 @@ static ssize_t ovl_splice_write(struct pipe_inode_info *pipe, struct file *out,

    file_end_write(real.file);
    /* Update size */

•   ovl_copyattr(inode);
  

•   ovl_file_modified(out);
    revert_creds(old_cred);
    fdput(real);
  
  

@@ -570,7 +574,7 @@ static long ovl_fallocate(struct file *file, int mode, loff_t offset, loff_t len revert_creds(old_cred);

    /* Update size */

•   ovl_copyattr(inode);
  

•   ovl_file_modified(file);
  
    fdput(real);
  
  

@@ -654,7 +658,7 @@ static loff_t ovl_copyfile(struct file *file_in, loff_t pos_in, revert_creds(old_cred);

    /* Update size */

•   ovl_copyattr(inode_out);
  

•   ovl_file_modified(file_out);
  
    fdput(real_in);
    fdput(real_out);