linux-kernel - [PATCH v2 2/3] fs: ubifs: update i

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Date:   Tue, 11 Apr 2017 11:50:54 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     richard@....at, dedekind1@...il.com, adrian.hunter@...el.com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>
Subject: [PATCH v2 2/3] fs: ubifs: update i_version on inode changes

increment i_version to notify security/IMA about changes
made in inode.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 fs/ubifs/file.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index d9ae86f96df7..29213724259b 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1104,6 +1104,8 @@ static void do_attr_changes(struct inode *inode, const struct iattr *attr)
 			mode &= ~S_ISGID;
 		inode->i_mode = mode;
 	}
+	if (IS_I_VERSION(inode))
+		inode_inc_iversion(inode);
 }
 
 /**
@@ -1401,6 +1403,9 @@ int ubifs_update_time(struct inode *inode, struct timespec *time,
 	if (!(inode->i_sb->s_flags & MS_LAZYTIME))
 		iflags |= I_DIRTY_SYNC;
 
+	if (IS_I_VERSION(inode))
+		inode_inc_iversion(inode);
+
 	release = ui->dirty;
 	__mark_inode_dirty(inode, iflags);
 	mutex_unlock(&ui->ui_mutex);
@@ -1435,6 +1440,8 @@ static int update_mctime(struct inode *inode)
 
 		mutex_lock(&ui->ui_mutex);
 		inode->i_mtime = inode->i_ctime = ubifs_current_time(inode);
+		if (IS_I_VERSION(inode))
+			inode_inc_iversion(inode);
 		release = ui->dirty;
 		mark_inode_dirty_sync(inode);
 		mutex_unlock(&ui->ui_mutex);
@@ -1580,6 +1587,8 @@ static int ubifs_vm_page_mkwrite(struct vm_fault *vmf)
 
 		mutex_lock(&ui->ui_mutex);
 		inode->i_mtime = inode->i_ctime = ubifs_current_time(inode);
+		if (IS_I_VERSION(inode))
+			inode_inc_iversion(inode);
 		release = ui->dirty;
 		mark_inode_dirty_sync(inode);
 		mutex_unlock(&ui->ui_mutex);
-- 
2.11.0