fix: memory leakage in file descriptor allocation

[lunaix-os.git] / lunaix-os / kernel / process / taskfs.c

diff --git a/lunaix-os/kernel/process/taskfs.c b/lunaix-os/kernel/process/taskfs.c
index 1e4ad2d658ec143874b99d92888a1d2e33357001..28c371346478a5cb83922e35662ccb3246eee4ef 100644 (file)
--- a/lunaix-os/kernel/process/taskfs.c
+++ b/lunaix-os/kernel/process/taskfs.c
@@ -85,6 +85,7 @@ taskfs_readdir(struct v_file* file, struct dir_context* dctx)
     return 0;
 }
 
+// ascii to pid
 pid_t
 taskfs_atop(const char* str)
 {
@@ -111,7 +112,8 @@ taskfs_dirlookup(struct v_inode* this, struct v_dnode* dnode)
         if (!tattr || !(proc = get_process(pid)))
             return ENOENT;
 
-        int errno = taskfs_mknod(dnode, pid, taskfs_next_counter(), VFS_IFFILE);
+        int errno =
+          taskfs_mknod(dnode, pid, taskfs_next_counter(), VFS_IFSEQDEV);
         if (!errno) {
             tattr->map_file->data = proc;
             dnode->inode->data = tattr->map_file;
@@ -147,14 +149,35 @@ taskfs_init_inode(struct v_superblock* vsb, struct v_inode* inode)
     inode->ops = &taskfs_inode_ops;
 }
 
+static volatile struct v_superblock* taskfs_sb;
+
 int
 taskfs_mount(struct v_superblock* vsb, struct v_dnode* mount_point)
 {
+    taskfs_sb = vsb;
     vsb->ops.init_inode = taskfs_init_inode;
 
     return taskfs_mknod(mount_point, 0, 0, VFS_IFDIR);
 }
 
+void
+taskfs_invalidate(pid_t pid)
+{
+    struct v_dnode *pos, *n;
+    struct v_inode* inode = vfs_i_find(taskfs_sb, taskfs_inode_id(pid, 0));
+
+    if (!inode)
+        return;
+
+    llist_for_each(pos, n, &inode->aka_dnodes, aka_list)
+    {
+        if (pos->ref_count > 1) {
+            continue;
+        }
+        vfs_d_free(pos);
+    }
+}
+
 #define ATTR_TABLE_LEN 16
 
 void