From: Steve French <sfrench@us.ibm.com>
Date: Mon, 7 Dec 2009 05:44:46 +0000 (+0000)
Subject: [CIFS] Enable mmap on forcedirectio mounts
X-Git-Tag: firefly_0821_release~9833^2~3498^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a994b8fa669f16c50728328c3735722a3f20652e;p=firefly-linux-kernel-4.4.55.git

[CIFS] Enable mmap on forcedirectio mounts

openoffice and gedit failed with 'direct' options

Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
---

diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 094ea65afc85..7b2600b380d7 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -5,7 +5,9 @@ have duplicated data). Fix oops in cifs_lookup. Workaround problem
 mounting to OS/400 Netserve. Fix oops in cifs_get_tcp_session.
 Disable use of server inode numbers when server only
 partially supports them (e.g. for one server querying inode numbers on
-FindFirst fails but QPathInfo queries works).
+FindFirst fails but QPathInfo queries works). Fix oops with dfs in 
+cifs_put_smb_ses. Fix mmap to work on directio mounts (needed
+for OpenOffice when on forcedirectio mount e.g.)
 
 Version 1.60
 -------------
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 29f1da761bbf..8c6a03627176 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -758,7 +758,7 @@ const struct file_operations cifs_file_ops = {
 };
 
 const struct file_operations cifs_file_direct_ops = {
-	/* no mmap, no aio, no readv -
+	/* no aio, no readv -
 	   BB reevaluate whether they can be done with directio, no cache */
 	.read = cifs_user_read,
 	.write = cifs_user_write,
@@ -767,6 +767,7 @@ const struct file_operations cifs_file_direct_ops = {
 	.lock = cifs_lock,
 	.fsync = cifs_fsync,
 	.flush = cifs_flush,
+	.mmap = cifs_file_mmap,
 	.splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
 	.unlocked_ioctl  = cifs_ioctl,