+static void selinux_write_opts(struct seq_file *m,
+ struct security_mnt_opts *opts)
+{
+ int i;
+ char *prefix;
+
+ for (i = 0; i < opts->num_mnt_opts; i++) {
+ char *has_comma = strchr(opts->mnt_opts[i], ',');
+
+ switch (opts->mnt_opts_flags[i]) {
+ case CONTEXT_MNT:
+ prefix = CONTEXT_STR;
+ break;
+ case FSCONTEXT_MNT:
+ prefix = FSCONTEXT_STR;
+ break;
+ case ROOTCONTEXT_MNT:
+ prefix = ROOTCONTEXT_STR;
+ break;
+ case DEFCONTEXT_MNT:
+ prefix = DEFCONTEXT_STR;
+ break;
+ default:
+ BUG();
+ };
+ /* we need a comma before each option */
+ seq_putc(m, ',');
+ seq_puts(m, prefix);
+ if (has_comma)
+ seq_putc(m, '\"');
+ seq_puts(m, opts->mnt_opts[i]);
+ if (has_comma)
+ seq_putc(m, '\"');
+ }
+}
+
+static int selinux_sb_show_options(struct seq_file *m, struct super_block *sb)
+{
+ struct security_mnt_opts opts;
+ int rc;
+
+ rc = selinux_get_mnt_opts(sb, &opts);
+ if (rc) {
+ /* before policy load we may get EINVAL, don't show anything */
+ if (rc == -EINVAL)
+ rc = 0;
+ return rc;
+ }
+
+ selinux_write_opts(m, &opts);
+
+ security_free_mnt_opts(&opts);
+
+ return rc;
+}
+