SUNRPC: split SUNPRC PipeFS dentry and private pipe data creation
This patch is a final step towards to removing PipeFS inode references from
kernel code other than PipeFS itself. It makes all kernel SUNRPC PipeFS users
depends on pipe private data, which state depend on their specific operations,
etc.
This patch completes SUNRPC PipeFS preparations and allows to create pipe
private data and PipeFS dentries independently.
Next step will be making SUNPRC PipeFS dentries allocated by SUNRPC PipeFS
network namespace aware routines.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 4093da7..6dd8b96 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -206,7 +206,6 @@
rpc_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
- kfree(RPC_I(inode)->pipe);
kmem_cache_free(rpc_inode_cachep, RPC_I(inode));
}
@@ -575,34 +574,44 @@
rpc_timeout_upcall_queue);
pipe->ops = NULL;
spin_lock_init(&pipe->lock);
-
+ pipe->dentry = NULL;
}
-static int __rpc_mkpipe(struct inode *dir, struct dentry *dentry,
- umode_t mode,
- const struct file_operations *i_fop,
- void *private,
- const struct rpc_pipe_ops *ops,
- int flags)
+void rpc_destroy_pipe_data(struct rpc_pipe *pipe)
+{
+ kfree(pipe);
+}
+EXPORT_SYMBOL_GPL(rpc_destroy_pipe_data);
+
+struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags)
{
struct rpc_pipe *pipe;
- struct rpc_inode *rpci;
- int err;
pipe = kzalloc(sizeof(struct rpc_pipe), GFP_KERNEL);
if (!pipe)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
init_pipe(pipe);
+ pipe->ops = ops;
+ pipe->flags = flags;
+ return pipe;
+}
+EXPORT_SYMBOL_GPL(rpc_mkpipe_data);
+
+static int __rpc_mkpipe_dentry(struct inode *dir, struct dentry *dentry,
+ umode_t mode,
+ const struct file_operations *i_fop,
+ void *private,
+ struct rpc_pipe *pipe)
+{
+ struct rpc_inode *rpci;
+ int err;
+
err = __rpc_create_common(dir, dentry, S_IFIFO | mode, i_fop, private);
- if (err) {
- kfree(pipe);
+ if (err)
return err;
- }
rpci = RPC_I(dentry->d_inode);
rpci->private = private;
rpci->pipe = pipe;
- rpci->pipe->flags = flags;
- rpci->pipe->ops = ops;
fsnotify_create(dir, dentry);
return 0;
}
@@ -819,9 +828,8 @@
* The @private argument passed here will be available to all these methods
* from the file pointer, via RPC_I(file->f_dentry->d_inode)->private.
*/
-struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
- void *private, const struct rpc_pipe_ops *ops,
- int flags)
+struct dentry *rpc_mkpipe_dentry(struct dentry *parent, const char *name,
+ void *private, struct rpc_pipe *pipe)
{
struct dentry *dentry;
struct inode *dir = parent->d_inode;
@@ -829,9 +837,9 @@
struct qstr q;
int err;
- if (ops->upcall == NULL)
+ if (pipe->ops->upcall == NULL)
umode &= ~S_IRUGO;
- if (ops->downcall == NULL)
+ if (pipe->ops->downcall == NULL)
umode &= ~S_IWUGO;
q.name = name;
@@ -842,8 +850,8 @@
dentry = __rpc_lookup_create_exclusive(parent, &q);
if (IS_ERR(dentry))
goto out;
- err = __rpc_mkpipe(dir, dentry, umode, &rpc_pipe_fops,
- private, ops, flags);
+ err = __rpc_mkpipe_dentry(dir, dentry, umode, &rpc_pipe_fops,
+ private, pipe);
if (err)
goto out_err;
out:
@@ -856,7 +864,7 @@
err);
goto out;
}
-EXPORT_SYMBOL_GPL(rpc_mkpipe);
+EXPORT_SYMBOL_GPL(rpc_mkpipe_dentry);
/**
* rpc_unlink - remove a pipe