Changeset ebeaaa06 in mainline for uspace/srv/fs/ext4fs/ext4fs_ops.c

Timestamp:

2011-11-21T11:46:37Z (12 years ago)

Author:

Frantisek Princ <frantisek.princ@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f49638e

Parents:

343ccfd

Message:

Unlink operation skeleton

File:

• uspace/srv/fs/ext4fs/ext4fs_ops.c (modified) (1 diff)

uspace/srv/fs/ext4fs/ext4fs_ops.c

@@ -444 +444 @@
 
 
-int ext4fs_unlink(fs_node_t *pfn, fs_node_t *cfn, const char *nm)
-{
-        EXT4FS_DBG("not supported");
-
+int ext4fs_unlink(fs_node_t *pfn, fs_node_t *cfn, const char *name)
+{
+
+        return ENOTSUP;
+
+        int rc;
+
+        bool has_children;
+        rc = ext4fs_has_children(&has_children, cfn);
+        if (rc != EOK) {
+                return rc;
+        }
+
+        // Cannot unlink non-empty node
+        if (has_children) {
+                return ENOTEMPTY;
+        }
+
+        // Remove entry from parent directory
         // TODO
-        return ENOTSUP;
+//      rc = ext4_directory_remove_entry(EXT4FS_NODE(pfn), name);
+//      if (rc != EOK) {
+//              return rc;
+//      }
+
+        // Decrement links count
+        ext4_inode_ref_t * child_inode_ref = EXT4FS_NODE(cfn)->inode_ref;
+
+        uint32_t lnk_count = ext4_inode_get_links_count(child_inode_ref->inode);
+        lnk_count--;
+        ext4_inode_set_links_count(child_inode_ref->inode, lnk_count);
+
+        child_inode_ref->dirty = true;
+
+        // If directory - handle links from parent
+        if (lnk_count <= 1 && ext4fs_is_directory(cfn)) {
+
+                ext4_inode_ref_t *parent_inode_ref = EXT4FS_NODE(pfn)->inode_ref;
+                uint32_t parent_lnk_count = ext4_inode_get_links_count(
+                                parent_inode_ref->inode);
+                parent_lnk_count--;
+                ext4_inode_set_links_count(parent_inode_ref->inode, parent_lnk_count);
+
+                parent_inode_ref->dirty = true;
+        }
+
+
+        return EOK;
 }