path: root/fs/attr.c
diff options
authorDmitry Kasatkin <dmitry.kasatkin@intel.com>2012-05-29 11:02:21 -0700
committerAl Viro <viro@zeniv.linux.org.uk>2012-05-30 21:04:53 -0400
commit799243a389bde0de10fa21ca1ca453d2fe538b85 (patch)
treef69ae5a69a4936ff3adbda72c64edc25756f0648 /fs/attr.c
parenta0a9b0433767713342f9cc70f563483c38e26f30 (diff)
vfs: increment iversion when a file is truncated
When a file is truncated with truncate()/ftruncate() and then closed, iversion is not updated. This patch uses ATTR_SIZE flag as an indication to increment iversion. Mimi said: On fput(), i_version is used to detect and flag files that have changed and need to be re-measured in the IMA measurement policy. When a file is truncated with truncate()/ftruncate() and then closed, i_version is not updated. As a result, although the file has changed, it will not be re-measured and added to the IMA measurement list on subsequent access. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com> Acked-by: Mimi Zohar <zohar@us.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/attr.c')
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/attr.c b/fs/attr.c
index 584620e5dee5..0da90951d277 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -176,6 +176,11 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
return -EPERM;
+ if ((ia_valid & ATTR_SIZE) && IS_I_VERSION(inode)) {
+ if (attr->ia_size != inode->i_size)
+ inode_inc_iversion(inode);
+ }
if ((ia_valid & ATTR_MODE)) {
umode_t amode = attr->ia_mode;
/* Flag setting protected by i_mutex */