struct key *keyring;
int ret = 0;
- printk(KERN_NOTICE "Registering the %s key type\n", key_type_id_resolver.name);
+ printk(KERN_NOTICE "NFS: Registering the %s key type\n",
+ key_type_id_resolver.name);
cred = prepare_kernel_cred(NULL);
if (!cred)
#include <linux/nfs_fs.h>
#include "nfs4_fs.h"
+#include "internal.h"
#define IDMAP_HASH_SZ 128
};
struct idmap {
- struct dentry *idmap_dentry;
+ struct rpc_pipe *idmap_pipe;
wait_queue_head_t idmap_wq;
struct idmap_msg idmap_im;
struct mutex idmap_lock; /* Serializes upcalls */
.destroy_msg = idmap_pipe_destroy_msg,
};
+static void __nfs_idmap_unregister(struct rpc_pipe *pipe)
+{
+ if (pipe->dentry)
+ rpc_unlink(pipe->dentry);
+}
+
+static int __nfs_idmap_register(struct dentry *dir,
+ struct idmap *idmap,
+ struct rpc_pipe *pipe)
+{
+ struct dentry *dentry;
+
+ dentry = rpc_mkpipe_dentry(dir, "idmap", idmap, pipe);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ pipe->dentry = dentry;
+ return 0;
+}
+
+static void nfs_idmap_unregister(struct nfs_client *clp,
+ struct rpc_pipe *pipe)
+{
+ struct net *net = clp->net;
+ struct super_block *pipefs_sb;
+
+ pipefs_sb = rpc_get_sb_net(net);
+ if (pipefs_sb) {
+ __nfs_idmap_unregister(pipe);
+ rpc_put_sb_net(net);
+ }
+}
+
+static int nfs_idmap_register(struct nfs_client *clp,
+ struct idmap *idmap,
+ struct rpc_pipe *pipe)
+{
+ struct net *net = clp->net;
+ struct super_block *pipefs_sb;
+ int err = 0;
+
+ pipefs_sb = rpc_get_sb_net(net);
+ if (pipefs_sb) {
+ if (clp->cl_rpcclient->cl_dentry)
+ err = __nfs_idmap_register(clp->cl_rpcclient->cl_dentry,
+ idmap, pipe);
+ rpc_put_sb_net(net);
+ }
+ return err;
+}
+
int
nfs_idmap_new(struct nfs_client *clp)
{
struct idmap *idmap;
+ struct rpc_pipe *pipe;
int error;
BUG_ON(clp->cl_idmap != NULL);
if (idmap == NULL)
return -ENOMEM;
- idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_path.dentry,
- "idmap", idmap, &idmap_upcall_ops, 0);
- if (IS_ERR(idmap->idmap_dentry)) {
- error = PTR_ERR(idmap->idmap_dentry);
+ pipe = rpc_mkpipe_data(&idmap_upcall_ops, 0);
+ if (IS_ERR(pipe)) {
+ error = PTR_ERR(pipe);
kfree(idmap);
return error;
}
-
+ error = nfs_idmap_register(clp, idmap, pipe);
+ if (error) {
+ rpc_destroy_pipe_data(pipe);
+ kfree(idmap);
+ return error;
+ }
+ idmap->idmap_pipe = pipe;
mutex_init(&idmap->idmap_lock);
mutex_init(&idmap->idmap_im_lock);
init_waitqueue_head(&idmap->idmap_wq);
if (!idmap)
return;
- rpc_unlink(idmap->idmap_dentry);
+ nfs_idmap_unregister(clp, idmap->idmap_pipe);
+ rpc_destroy_pipe_data(idmap->idmap_pipe);
clp->cl_idmap = NULL;
kfree(idmap);
}
+static int __rpc_pipefs_event(struct nfs_client *clp, unsigned long event,
+ struct super_block *sb)
+{
+ int err = 0;
+
+ switch (event) {
+ case RPC_PIPEFS_MOUNT:
+ BUG_ON(clp->cl_rpcclient->cl_dentry == NULL);
+ err = __nfs_idmap_register(clp->cl_rpcclient->cl_dentry,
+ clp->cl_idmap,
+ clp->cl_idmap->idmap_pipe);
+ break;
+ case RPC_PIPEFS_UMOUNT:
+ if (clp->cl_idmap->idmap_pipe) {
+ struct dentry *parent;
+
+ parent = clp->cl_idmap->idmap_pipe->dentry->d_parent;
+ __nfs_idmap_unregister(clp->cl_idmap->idmap_pipe);
+ /*
+ * Note: This is a dirty hack. SUNRPC hook has been
+ * called already but simple_rmdir() call for the
+ * directory returned with error because of idmap pipe
+ * inside. Thus now we have to remove this directory
+ * here.
+ */
+ if (rpc_rmdir(parent))
+ printk(KERN_ERR "%s: failed to remove clnt dir!\n", __func__);
+ }
+ break;
+ default:
+ printk(KERN_ERR "%s: unknown event: %ld\n", __func__, event);
+ return -ENOTSUPP;
+ }
+ return err;
+}
+
+static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,
+ void *ptr)
+{
+ struct super_block *sb = ptr;
+ struct nfs_client *clp;
+ int error = 0;
+
+ spin_lock(&nfs_client_lock);
+ list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
+ if (clp->net != sb->s_fs_info)
+ continue;
+ if (clp->rpc_ops != &nfs_v4_clientops)
+ continue;
+ error = __rpc_pipefs_event(clp, event, sb);
+ if (error)
+ break;
+ }
+ spin_unlock(&nfs_client_lock);
+ return error;
+}
+
+#define PIPEFS_NFS_PRIO 1
+
+static struct notifier_block nfs_idmap_block = {
+ .notifier_call = rpc_pipefs_event,
+ .priority = SUNRPC_PIPEFS_NFS_PRIO,
+};
+
+int nfs_idmap_init(void)
+{
+ return rpc_pipefs_notifier_register(&nfs_idmap_block);
+}
+
+void nfs_idmap_quit(void)
+{
+ rpc_pipefs_notifier_unregister(&nfs_idmap_block);
+}
+
/*
* Helper routines for manipulating the hashtable
*/
msg.len = sizeof(*im);
add_wait_queue(&idmap->idmap_wq, &wq);
- if (rpc_queue_upcall(idmap->idmap_dentry->d_inode, &msg) < 0) {
+ if (rpc_queue_upcall(idmap->idmap_pipe, &msg) < 0) {
remove_wait_queue(&idmap->idmap_wq, &wq);
goto out;
}
add_wait_queue(&idmap->idmap_wq, &wq);
- if (rpc_queue_upcall(idmap->idmap_dentry->d_inode, &msg) < 0) {
+ if (rpc_queue_upcall(idmap->idmap_pipe, &msg) < 0) {
remove_wait_queue(&idmap->idmap_wq, &wq);
goto out;
}
projects / deliverable / linux.git / blobdiff