Merge branch 'master' of github.com:jtsiomb/pcboot

[bootcensus] / src / mtab.c

diff --git a/src/mtab.c b/src/mtab.c
new file mode 100644 (file)
index 0000000..3d5f169
--- /dev/null
+++ b/src/mtab.c
@@ -0,0 +1,63 @@
+/*
+pcboot - bootable PC demo/game kernel
+Copyright (C) 2018-2019  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY, without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+#include <stdlib.h>
+#include "mtab.h"
+
+int mtab_add(struct fs_node *node, struct filesys *fs)
+{
+       struct mount *m;
+
+       if(!(m = malloc(sizeof *m))) {
+               return -1;
+       }
+       m->mpt = node;
+       m->fs = fs;
+       m->next = 0;
+
+       if(mnt_list) {
+               mnt_tail->next = m;
+               mnt_tail = m;
+       } else {
+               mnt_list = mnt_tail = m;
+       }
+       mnt_count++;
+       return 0;
+}
+
+int mtab_remove_node(struct fs_node *node)
+{
+       int res = -1;
+       struct mount dummy;
+       struct mount *prev, *m;
+
+       dummy.next = mnt_list;
+       prev = &dummy;
+
+       while(prev->next) {
+               m = prev->next;
+               if(m->mpt == node) {
+                       prev->next = m->next;
+                       free(m);
+                       res = 0;
+                       break;
+               }
+               prev = prev->next;
+       }
+       mnt_list = dummy.next;
+       return res;
+}