LU-7839 nodemap: add a flag to deny access to unmapped users

[fs/lustre-release.git] / lustre / ptlrpc / nodemap_lproc.c

diff --git a/lustre/ptlrpc/nodemap_lproc.c b/lustre/ptlrpc/nodemap_lproc.c
index fa6a6a7..49e7ac6 100644 (file)
--- a/lustre/ptlrpc/nodemap_lproc.c
+++ b/lustre/ptlrpc/nodemap_lproc.c
@@ -463,6 +463,33 @@ static int nodemap_admin_seq_show(struct seq_file *m, void *data)
        return 0;
 }
 
+/**
+ * Reads and prints the deny_unknown flag for the given nodemap.
+ *
+ * \param      m               seq file in proc fs
+ * \param      data            unused
+ * \retval     0               success
+ */
+static int nodemap_deny_unknown_seq_show(struct seq_file *m, void *data)
+{
+       struct lu_nodemap *nodemap;
+       int rc;
+
+       mutex_lock(&active_config_lock);
+       nodemap = nodemap_lookup(m->private);
+       mutex_unlock(&active_config_lock);
+       if (IS_ERR(nodemap)) {
+               rc = PTR_ERR(nodemap);
+               CERROR("cannot find nodemap '%s': rc = %d\n",
+                       (char *)m->private, rc);
+               return rc;
+       }
+
+       seq_printf(m, "%d\n", (int)nodemap->nmf_deny_unknown);
+       nodemap_putref(nodemap);
+       return 0;
+}
+
 #ifdef NODEMAP_PROC_DEBUG
 /**
  * Helper functions to set nodemap flags.
@@ -1067,6 +1094,8 @@ LPROC_SEQ_FOPS_RO(nodemap_squash_uid);
 LPROC_SEQ_FOPS_RO(nodemap_squash_gid);
 #endif
 
+LPROC_SEQ_FOPS_RO(nodemap_deny_unknown);
+
 const struct file_operations nodemap_ranges_fops = {
        .open                   = nodemap_ranges_open,
        .read                   = seq_read,
@@ -1102,6 +1131,10 @@ static struct lprocfs_vars lprocfs_nodemap_vars[] = {
                .fops           = &nodemap_admin_fops,
        },
        {
+               .name           = "deny_unknown",
+               .fops           = &nodemap_deny_unknown_fops,
+       },
+       {
                .name           = "squash_uid",
                .fops           = &nodemap_squash_uid_fops,
        },