Implement generating an inode table for NFS export

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 36 insertions, 0 deletions

diff --git a/lib/sqfs/write_export_table.c b/lib/sqfs/write_export_table.c
new file mode 100644
index 0000000..eee4e01
--- /dev/null
+++ b/lib/sqfs/write_export_table.c
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "highlevel.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int write_export_table(int outfd, fstree_t *fs, sqfs_super_t *super,
+		       compressor_t *cmp)
+{
+	uint64_t *table, start;
+	size_t i;
+	int ret;
+
+	table = malloc(sizeof(uint64_t) * fs->inode_tbl_size);
+
+	if (table == NULL) {
+		perror("Allocating NFS export table");
+		return -1;
+	}
+
+	for (i = 0; i < fs->inode_tbl_size; ++i) {
+		if (fs->inode_table[i] == NULL) {
+			table[i] = 0xFFFFFFFFFFFFFFFF;
+		} else {
+			table[i] = htole64(fs->inode_table[i]->inode_ref);
+		}
+	}
+
+	ret = sqfs_write_table(outfd, super, table, sizeof(table[0]),
+			       fs->inode_tbl_size, &start, cmp);
+
+	super->export_table_start = start;
+	super->flags |= SQFS_FLAG_EXPORTABLE;
+	free(table);
+	return ret;
+}