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path: root/drivers/md/dm-ima.c
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Diffstat (limited to 'drivers/md/dm-ima.c')
-rw-r--r--drivers/md/dm-ima.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/md/dm-ima.c b/drivers/md/dm-ima.c
index 1a22860888fa..91ea4a7202ab 100644
--- a/drivers/md/dm-ima.c
+++ b/drivers/md/dm-ima.c
@@ -655,3 +655,51 @@ error2:
error1:
kfree(device_table_data);
}
+
+/*
+ * Measure IMA data on device rename.
+ */
+void dm_ima_measure_on_device_rename(struct mapped_device *md)
+{
+ char *old_device_data = NULL, *new_device_data = NULL, *combined_device_data = NULL;
+ char *new_dev_name = NULL, *new_dev_uuid = NULL, *capacity_str = NULL;
+ bool noio = true;
+ int r;
+
+ if (dm_ima_alloc_and_copy_device_data(md, &new_device_data,
+ md->ima.active_table.num_targets, noio))
+ return;
+
+ if (dm_ima_alloc_and_copy_name_uuid(md, &new_dev_name, &new_dev_uuid, noio))
+ goto error;
+
+ combined_device_data = dm_ima_alloc(DM_IMA_DEVICE_BUF_LEN * 2, GFP_KERNEL, noio);
+ if (!combined_device_data)
+ goto error;
+
+ r = dm_ima_alloc_and_copy_capacity_str(md, &capacity_str, noio);
+ if (r)
+ goto error;
+
+ old_device_data = md->ima.active_table.device_metadata;
+
+ md->ima.active_table.device_metadata = new_device_data;
+ md->ima.active_table.device_metadata_len = strlen(new_device_data);
+
+ scnprintf(combined_device_data, DM_IMA_DEVICE_BUF_LEN * 2, "%snew_name=%s,new_uuid=%s;%s",
+ old_device_data, new_dev_name, new_dev_uuid, capacity_str);
+
+ dm_ima_measure_data("device_rename", combined_device_data, strlen(combined_device_data),
+ noio);
+
+ goto exit;
+
+error:
+ kfree(new_device_data);
+exit:
+ kfree(capacity_str);
+ kfree(combined_device_data);
+ kfree(old_device_data);
+ kfree(new_dev_name);
+ kfree(new_dev_uuid);
+}