fs/9p: This patch implements TLCREATE for 9p2000.L protocol.

[net-next-2.6.git] / fs / 9p / vfs_inode.c

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 39dc795673229bc7870754261ed239fc4b0be617..2ac245902a4ffd2b4650985a47a40a3f01fdb01e 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -641,6 +641,118 @@ error:
        return ERR_PTR(err);
 }
 
+/**
+ * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
+ * @dir: directory inode that is being created
+ * @dentry:  dentry that is being deleted
+ * @mode: create permissions
+ * @nd: path information
+ *
+ */
+
+static int
+v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode,
+               struct nameidata *nd)
+{
+       int err = 0;
+       char *name = NULL;
+       gid_t gid;
+       int flags;
+       struct v9fs_session_info *v9ses;
+       struct p9_fid *fid = NULL;
+       struct p9_fid *dfid, *ofid;
+       struct file *filp;
+       struct p9_qid qid;
+       struct inode *inode;
+
+       v9ses = v9fs_inode2v9ses(dir);
+       if (nd && nd->flags & LOOKUP_OPEN)
+               flags = nd->intent.open.flags - 1;
+       else
+               flags = O_RDWR;
+
+       name = (char *) dentry->d_name.name;
+       P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
+                       "mode:0x%x\n", name, flags, mode);
+
+       dfid = v9fs_fid_lookup(dentry->d_parent);
+       if (IS_ERR(dfid)) {
+               err = PTR_ERR(dfid);
+               P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+               return err;
+       }
+
+       /* clone a fid to use for creation */
+       ofid = p9_client_walk(dfid, 0, NULL, 1);
+       if (IS_ERR(ofid)) {
+               err = PTR_ERR(ofid);
+               P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
+               return err;
+       }
+
+       gid = v9fs_get_fsgid_for_create(dir);
+       err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
+       if (err < 0) {
+               P9_DPRINTK(P9_DEBUG_VFS,
+                               "p9_client_open_dotl failed in creat %d\n",
+                               err);
+               goto error;
+       }
+
+       /* No need to populate the inode if we are not opening the file AND
+        * not in cached mode.
+        */
+       if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) {
+               /* Not in cached mode. No need to populate inode with stat */
+               dentry->d_op = &v9fs_dentry_operations;
+               p9_client_clunk(ofid);
+               d_instantiate(dentry, NULL);
+               return 0;
+       }
+
+       /* Now walk from the parent so we can get an unopened fid. */
+       fid = p9_client_walk(dfid, 1, &name, 1);
+       if (IS_ERR(fid)) {
+               err = PTR_ERR(fid);
+               P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
+               fid = NULL;
+               goto error;
+       }
+
+       /* instantiate inode and assign the unopened fid to dentry */
+       inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
+       if (IS_ERR(inode)) {
+               err = PTR_ERR(inode);
+               P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
+               goto error;
+       }
+       dentry->d_op = &v9fs_cached_dentry_operations;
+       d_instantiate(dentry, inode);
+       err = v9fs_fid_add(dentry, fid);
+       if (err < 0)
+               goto error;
+
+       /* if we are opening a file, assign the open fid to the file */
+       if (nd && nd->flags & LOOKUP_OPEN) {
+               filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
+               if (IS_ERR(filp)) {
+                       p9_client_clunk(ofid);
+                       return PTR_ERR(filp);
+               }
+               filp->private_data = ofid;
+       } else
+               p9_client_clunk(ofid);
+
+       return 0;
+
+error:
+       if (ofid)
+               p9_client_clunk(ofid);
+       if (fid)
+               p9_client_clunk(fid);
+       return err;
+}
+
 /**
  * v9fs_vfs_create - VFS hook to create files
  * @dir: directory inode that is being created
@@ -1808,7 +1920,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
 };
 
 static const struct inode_operations v9fs_dir_inode_operations_dotl = {
-       .create = v9fs_vfs_create,
+       .create = v9fs_vfs_create_dotl,
        .lookup = v9fs_vfs_lookup,
        .link = v9fs_vfs_link_dotl,
        .symlink = v9fs_vfs_symlink_dotl,