X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/f8bd95b7a13dfe54d800e2d7ecdb0329f0798289..270869139db617e29a35bb9ded41087bb702f9ac:/lunaix-os/kernel/fs/path_walk.c

diff --git a/lunaix-os/kernel/fs/path_walk.c b/lunaix-os/kernel/fs/path_walk.c
index f3dc8dd..783d9b4 100644
--- a/lunaix-os/kernel/fs/path_walk.c
+++ b/lunaix-os/kernel/fs/path_walk.c
@@ -6,6 +6,7 @@
 #include <klibc/string.h>
 
 #define VFS_SYMLINK_DEPTH 16
+#define VFS_SYMLINK_MAXLEN 512
 
 extern struct lru_zone *dnode_lru, *inode_lru;
 
@@ -119,21 +120,28 @@ __vfs_walk(struct v_dnode* start,
         current_level = dnode;
         current_inode = current_level->inode;
 
-        if ((current_inode->itype & VFS_IFSYMLINK) &&
+        assert(current_inode);
+        
+        if (check_symlink_node(current_inode) &&
             !(walk_options & VFS_WALK_NOFOLLOW)) {
             const char* link;
+            struct v_inode_ops* iops;
 
-            if (!current_inode->ops->read_symlink) {
+            iops = current_inode->ops;
+
+            if (!iops->read_symlink) {
                 errno = ENOTSUP;
                 goto error;
             }
 
             lock_inode(current_inode);
-            if ((errno =
-                   current_inode->ops->read_symlink(current_inode, &link))) {
+
+            errno = iops->read_symlink(current_inode, &link);
+            if ((errno < 0)) {
                 unlock_inode(current_inode);
                 goto error;
             }
+
             unlock_inode(current_inode);
 
             errno = __vfs_walk(current_level->parent,
@@ -148,8 +156,6 @@ __vfs_walk(struct v_dnode* start,
                 goto error;
             }
 
-            // reposition the resolved subtree pointed by symlink
-            // vfs_dcache_rehash(current_level->parent, dnode);
             current_level = dnode;
             current_inode = dnode->inode;
         }
@@ -175,6 +181,11 @@ vfs_walk(struct v_dnode* start,
          struct hstr* component,
          int options)
 {
+    if (!path) {
+        *dentry = NULL;
+        return 0;
+    }
+
     // allocate a file name stack for path walking and recursion to resolve
     // symlink
     char* name_buffer = valloc(2048);