ima: Rename backing_inode to real_inode

Rename the backing_inode variable to real_inode since it gets its value
from real_inode().

Suggested-by: Amir Goldstein <amir73il@gmail.com>
Co-developed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index fff155f230a57d2385bd18456d38a7626eaf704f..eebf629f192ecc6cfd4a8506920b1ad8bd663391 100644 (file)
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -208,7 +208,7 @@ static int process_measurement(struct file *file, const struct cred *cred,
                               u32 secid, char *buf, loff_t size, int mask,
                               enum ima_hooks func)
 {
-       struct inode *backing_inode, *inode = file_inode(file);
+       struct inode *real_inode, *inode = file_inode(file);
        struct ima_iint_cache *iint = NULL;
        struct ima_template_desc *template_desc = NULL;
        char *pathbuf = NULL;
@@ -285,14 +285,16 @@ static int process_measurement(struct file *file, const struct cred *cred,
                iint->measured_pcrs = 0;
        }
 
-       /* Detect and re-evaluate changes made to the backing file. */
-       backing_inode = d_real_inode(file_dentry(file));
-       if (backing_inode != inode &&
+       /*
+        * On stacked filesystems, detect and re-evaluate file data changes.
+        */
+       real_inode = d_real_inode(file_dentry(file));
+       if (real_inode != inode &&
            (action & IMA_DO_MASK) && (iint->flags & IMA_DONE_MASK)) {
-               if (!IS_I_VERSION(backing_inode) ||
-                   backing_inode->i_sb->s_dev != iint->real_dev ||
-                   backing_inode->i_ino != iint->real_ino ||
-                   !inode_eq_iversion(backing_inode, iint->version)) {
+               if (!IS_I_VERSION(real_inode) ||
+                   real_inode->i_sb->s_dev != iint->real_dev ||
+                   real_inode->i_ino != iint->real_ino ||
+                   !inode_eq_iversion(real_inode, iint->version)) {
                        iint->flags &= ~IMA_DONE_MASK;
                        iint->measured_pcrs = 0;
                }