NFS link operation.

diff --git a/nfs3/nfs3.c b/nfs3/nfs3.c
index 2c0d150..3f8a8d2 100644 (file)
--- a/nfs3/nfs3.c
+++ b/nfs3/nfs3.c
@@ -542,8 +542,54 @@ link3res *
 nfsproc3_link_3_svc(link3args *argp, struct svc_req *rqstp)
 {
     static link3res result;
+    struct wcc_data wcc;
+    memset(&wcc, 0, sizeof(wcc));
 
-    result.status = NFS3ERR_NOTSUPP;
+    BlueSkyInode *inode = lookup_fh(&argp->file);
+    if (inode == NULL) {
+        result.status = NFS3ERR_STALE;
+        result.link3res_u.res.linkdir_wcc = wcc;
+        return &result;
+    }
+
+    BlueSkyInode *dir = lookup_fh(&argp->link.dir);
+    if (dir == NULL) {
+        result.status = NFS3ERR_STALE;
+        result.link3res_u.res.linkdir_wcc = wcc;
+        return &result;
+    }
+
+    encode_pre_wcc(&wcc, dir);
+    if (dir->type != BLUESKY_DIRECTORY) {
+        result.status = NFS3ERR_NOTDIR;
+        result.link3res_u.res.linkdir_wcc = wcc;
+        return &result;
+    }
+
+    if (!validate_filename(argp->link.name)
+        || strcmp(argp->link.name, ".") == 0
+        || strcmp(argp->link.name, "..") == 0
+        || bluesky_directory_lookup(dir, argp->link.name) != 0)
+    {
+        result.status = NFS3ERR_EXIST;
+        result.link3res_u.res.linkdir_wcc = wcc;
+        return &result;
+    }
+
+    if (!bluesky_directory_insert(dir, argp->link.name, inode->inum)) {
+        result.status = NFS3ERR_EXIST;
+        result.link3res_u.res.linkdir_wcc = wcc;
+        return &result;
+    }
+    inode->nlink++;
+    bluesky_inode_update_ctime(inode, 0);
+
+    result.status = NFS3_OK;
+    wcc.after.present = TRUE;
+    encode_fattr3(&wcc.after.post_op_attr_u.attributes, dir);
+    result.link3res_u.res.file_attributes.present = TRUE;
+    encode_fattr3(&result.link3res_u.res.file_attributes.post_op_attr_u.attributes, inode);
+    result.link3res_u.res.linkdir_wcc = wcc;
 
     return &result;
 }