The patch below does not apply to the 5.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 3e3761f1ec7df67d88cfca5e2ea98538f529e645 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Mon, 29 Aug 2022 11:53:41 -0500
Subject: [PATCH] smb3: use filemap_write_and_wait_range instead of
filemap_write_and_wait
When doing insert range and collapse range we should be
writing out the cached pages for the ranges affected but not
the whole file.
Fixes: c3a72bb21320 ("smb3: Move the flush out of smb2_copychunk_range() into its callers")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Paulo Alcantara (SUSE) <pc@xxxxxx>
Reviewed-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e9fb338b8e7e..8042d7280dec 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1219,8 +1219,6 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
cifs_dbg(FYI, "copychunk range\n");
- filemap_write_and_wait(src_inode->i_mapping);
-
if (!src_file->private_data || !dst_file->private_data) {
rc = -EBADF;
cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
@@ -1250,6 +1248,12 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
lock_two_nondirectories(target_inode, src_inode);
cifs_dbg(FYI, "about to flush pages\n");
+
+ rc = filemap_write_and_wait_range(src_inode->i_mapping, off,
+ off + len - 1);
+ if (rc)
+ goto out;
+
/* should we flush first and last page first */
truncate_inode_pages(&target_inode->i_data, 0);
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 7c941ce1e7a9..421be43af425 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -3687,7 +3687,10 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
}
filemap_invalidate_lock(inode->i_mapping);
- filemap_write_and_wait(inode->i_mapping);
+ rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
+ if (rc < 0)
+ goto out_2;
+
truncate_pagecache_range(inode, off, old_eof);
rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
@@ -3738,7 +3741,9 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
eof = cpu_to_le64(old_eof + len);
filemap_invalidate_lock(inode->i_mapping);
- filemap_write_and_wait(inode->i_mapping);
+ rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
+ if (rc < 0)
+ goto out_2;
truncate_pagecache_range(inode, off, old_eof);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
