From: Steve French <stfrench@microsoft.com>
Date: Wed, 5 Feb 2020 22:52:11 +0000 (-0600)
Subject: cifs: log warning message (once) if out of disk space
X-Git-Tag: v5.6-rc1~4^2~9
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d6fd41905ec577851734623fb905b1763801f5ef;p=thirdparty%2Flinux.git

cifs: log warning message (once) if out of disk space

We ran into a confusing problem where an application wasn't checking
return code on close and so user didn't realize that the application
ran out of disk space.  log a warning message (once) in these
cases. For example:

  [ 8407.391909] Out of space writing to \\oleg-server\small-share

Signed-off-by: Steve French <stfrench@microsoft.com>
Reported-by: Oleg Kravtsov <oleg@tuxera.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
---

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 7996d81230aae..1a732ff71de4b 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -4029,6 +4029,9 @@ smb2_writev_callback(struct mid_q_entry *mid)
 				     wdata->cfile->fid.persistent_fid,
 				     tcon->tid, tcon->ses->Suid, wdata->offset,
 				     wdata->bytes, wdata->result);
+		if (wdata->result == -ENOSPC)
+			printk_once(KERN_WARNING "Out of space writing to %s\n",
+				    tcon->treeName);
 	} else
 		trace_smb3_write_done(0 /* no xid */,
 				      wdata->cfile->fid.persistent_fid,