diff options
| author | Dmitry Kasatkin <dmitry.kasatkin@intel.com> | 2012-05-29 11:02:21 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-06-10 14:41:50 +0100 |
| commit | e384357a14c49f0107a061cb089c89a59d8a3b20 (patch) | |
| tree | 962fc48e9e68f696342132881592e031d36585b6 /fs | |
| parent | 48b0fff1aa1f5c4c9258034c2ba087e6dec0b470 (diff) | |
vfs: increment iversion when a file is truncated
commit 799243a389bde0de10fa21ca1ca453d2fe538b85 upstream.
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/attr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/attr.c b/fs/attr.c index 7ee7ba488313..b8f55c40fb1d 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)) { mode_t amode = attr->ia_mode; /* Flag setting protected by i_mutex */ |