Linux kernel commit 38129a13e6e7 ("switch mnt_hash to hlist"),
moves mnt_hash from list_head to hlist_node. Introduce these
list type changes to iterate over the mounted filesystem and
walk dentries.
These changes are not compatible with previous kernel versions,
so add new dir_names script file for kernel version >= 3.14
to kernel version <= 4.8.
Signed-off-by: Kamalesh Babulal <kamalesh at linux.vnet.ibm.com>
Cc: Atsushi Kumagai <ats-kumagai at wm.jp.nec.com>
---
eppic_scripts/dir_names_3_14_to_4_8.c | 82 +++++++++++++++++++++++++++++++++++
1 file changed, 82 insertions(+)
create mode 100644 eppic_scripts/dir_names_3_14_to_4_8.c
diff --git a/eppic_scripts/dir_names_3_14_to_4_8.c b/eppic_scripts/dir_names_3_14_to_4_8.c
new file mode 100644
index 0000000..5bf08fe
--- /dev/null
+++ b/eppic_scripts/dir_names_3_14_to_4_8.c
@@ -0,0 +1,82 @@
+string
+vfs_opt()
+{
+ return "l";
+}
+
+string
+vfs_usage()
+{
+ return "\n";
+}
+
+static void
+vfs_showusage()
+{
+ printf("usage : vfs %s", vfs_usage());
+}
+
+string
+vfs_help()
+{
+ return "Help";
+}
+
+void
+rm_names(struct dentry *dir)
+{
+ struct list_head *next, *head;
+ unsigned int hash_len;
+ int i;
+
+ memset(dir->d_iname, 0, 0x20);
+ hash_len = *((unsigned int *)&dir->d_name);
+ memset(dir->d_name.name, 0, hash_len);
+
+ head = (struct list_head *)&(dir->d_subdirs);
+ next = (struct list_head *)dir->d_subdirs.next;
+
+ while (next != head)
+ {
+ struct dentry *child, *off = 0;
+
+ child = (struct dentry *)((unsigned long)next - (unsigned long)&(off->d_child));
+ rm_names(child);
+ next = child->d_child.next;
+ }
+
+ return;
+}
+
+int
+vfs()
+{
+ int i;
+ struct hlist_bl_head *tab;
+ unsigned int d_hash_size = d_hash_mask;
+
+ tab = (struct hlist_bl_head *)dentry_hashtable;
+
+ for (i = 0; i < d_hash_size; i++)
+ {
+ struct hlist_bl_head *head;
+ struct hlist_bl_node *head_node, *next;
+
+ head = (struct hlist_bl_head *) (tab + i);
+ head_node = head->first;
+ if (!head_node)
+ continue;
+
+ next = head_node;
+
+ while (next)
+ {
+ struct dentry *root, *off = 0;
+
+ root = (struct dentry *)((unsigned long)next - (unsigned long)&(off->d_hash));
+ rm_names(root);
+ next = next->next;
+ }
+ }
+ return 1;
+}
--
2.7.4
