#include <linux/pagemap.h>
#include <linux/mount.h>
#include <linux/namei.h>
-#include <linux/dnotify.h>
+#include <linux/fsnotify.h>
#include <linux/kernel.h>
#include <asm/ioctls.h>
rpc_purge_list(rpci, &free_list, destroy_msg, -ETIMEDOUT);
}
+/**
+ * rpc_queue_upcall
+ * @inode: inode of upcall pipe on which to queue given message
+ * @msg: message to queue
+ *
+ * Call with an @inode created by rpc_mkpipe() to queue an upcall.
+ * A userspace process may then later read the upcall by performing a
+ * read on an open file for this inode. It is up to the caller to
+ * initialize the fields of @msg (other than @msg->list) appropriately.
+ */
int
rpc_queue_upcall(struct inode *inode, struct rpc_pipe_msg *msg)
{
wake_up(&rpci->waitq);
return res;
}
+EXPORT_SYMBOL_GPL(rpc_queue_upcall);
static inline void
rpc_inode_setowner(struct inode *inode, void *private)
{
struct rpc_inode *rpci = RPC_I(inode);
struct rpc_pipe_ops *ops;
+ int need_release;
mutex_lock(&inode->i_mutex);
ops = rpci->ops;
if (ops != NULL) {
LIST_HEAD(free_list);
-
spin_lock(&inode->i_lock);
+ need_release = rpci->nreaders != 0 || rpci->nwriters != 0;
rpci->nreaders = 0;
list_splice_init(&rpci->in_upcall, &free_list);
list_splice_init(&rpci->pipe, &free_list);
spin_unlock(&inode->i_lock);
rpc_purge_list(rpci, &free_list, ops->destroy_msg, -EPIPE);
rpci->nwriters = 0;
- if (ops->release_pipe)
+ if (need_release && ops->release_pipe)
ops->release_pipe(inode);
- cancel_delayed_work(&rpci->queue_timeout);
- flush_workqueue(rpciod_workqueue);
+ cancel_delayed_work_sync(&rpci->queue_timeout);
}
rpc_inode_setowner(inode, NULL);
mutex_unlock(&inode->i_mutex);
rpc_pipe_open(struct inode *inode, struct file *filp)
{
struct rpc_inode *rpci = RPC_I(inode);
+ int first_open;
int res = -ENXIO;
mutex_lock(&inode->i_mutex);
- if (rpci->ops != NULL) {
- if (filp->f_mode & FMODE_READ)
- rpci->nreaders ++;
- if (filp->f_mode & FMODE_WRITE)
- rpci->nwriters ++;
- res = 0;
+ if (rpci->ops == NULL)
+ goto out;
+ first_open = rpci->nreaders == 0 && rpci->nwriters == 0;
+ if (first_open && rpci->ops->open_pipe) {
+ res = rpci->ops->open_pipe(inode);
+ if (res)
+ goto out;
}
+ if (filp->f_mode & FMODE_READ)
+ rpci->nreaders++;
+ if (filp->f_mode & FMODE_WRITE)
+ rpci->nwriters++;
+ res = 0;
+out:
mutex_unlock(&inode->i_mutex);
return res;
}
{
struct rpc_inode *rpci = RPC_I(inode);
struct rpc_pipe_msg *msg;
+ int last_close;
mutex_lock(&inode->i_mutex);
if (rpci->ops == NULL)
rpci->ops->destroy_msg, -EAGAIN);
}
}
- if (rpci->ops->release_pipe)
+ last_close = rpci->nwriters == 0 && rpci->nreaders == 0;
+ if (last_close && rpci->ops->release_pipe)
rpci->ops->release_pipe(inode);
out:
mutex_unlock(&inode->i_mutex);
mask = POLLOUT | POLLWRNORM;
if (rpci->ops == NULL)
mask |= POLLERR | POLLHUP;
- if (!list_empty(&rpci->pipe))
+ if (filp->private_data || !list_empty(&rpci->pipe))
mask |= POLLIN | POLLRDNORM;
return mask;
}
clnt->cl_prog, clnt->cl_vers);
seq_printf(m, "address: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR));
seq_printf(m, "protocol: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_PROTO));
+ seq_printf(m, "port: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_PORT));
return 0;
}
RPCAUTH_nfs,
RPCAUTH_portmap,
RPCAUTH_statd,
+ RPCAUTH_nfsd4_cb,
RPCAUTH_RootEOF
};
.name = "statd",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
+ [RPCAUTH_nfsd4_cb] = {
+ .name = "nfsd4_cb",
+ .mode = S_IFDIR | S_IRUGO | S_IXUGO,
+ },
};
enum {
static int
rpc_lookup_parent(char *path, struct nameidata *nd)
{
+ struct vfsmount *mnt;
+
if (path[0] == '\0')
return -ENOENT;
- nd->mnt = rpc_get_mount();
- if (IS_ERR(nd->mnt)) {
+
+ mnt = rpc_get_mount();
+ if (IS_ERR(mnt)) {
printk(KERN_WARNING "%s: %s failed to mount "
- "pseudofilesystem \n", __FILE__, __FUNCTION__);
- return PTR_ERR(nd->mnt);
+ "pseudofilesystem \n", __FILE__, __func__);
+ return PTR_ERR(mnt);
}
- mntget(nd->mnt);
- nd->dentry = dget(rpc_mount->mnt_root);
- nd->last_type = LAST_ROOT;
- nd->flags = LOOKUP_PARENT;
- nd->depth = 0;
- if (path_walk(path, nd)) {
+ if (vfs_path_lookup(mnt->mnt_root, mnt, path, LOOKUP_PARENT, nd)) {
printk(KERN_WARNING "%s: %s failed to find path %s\n",
- __FILE__, __FUNCTION__, path);
+ __FILE__, __func__, path);
rpc_put_mount();
return -ENOENT;
}
static void
rpc_release_path(struct nameidata *nd)
{
- path_release(nd);
+ path_put(&nd->path);
rpc_put_mount();
}
if (!inode)
return NULL;
inode->i_mode = mode;
- inode->i_uid = inode->i_gid = 0;
- inode->i_blocks = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
switch(mode & S_IFMT) {
case S_IFDIR:
/*
* FIXME: This probably has races.
*/
-static void
-rpc_depopulate(struct dentry *parent, int start, int eof)
+static void rpc_depopulate(struct dentry *parent,
+ unsigned long start, unsigned long eof)
{
struct inode *dir = parent->d_inode;
struct list_head *pos, *next;
if (S_ISDIR(mode))
inc_nlink(dir);
d_add(dentry, inode);
+ fsnotify_create(dir, dentry);
}
mutex_unlock(&dir->i_mutex);
return 0;
out_bad:
mutex_unlock(&dir->i_mutex);
printk(KERN_WARNING "%s: %s failed to populate directory %s\n",
- __FILE__, __FUNCTION__, parent->d_name.name);
+ __FILE__, __func__, parent->d_name.name);
return -ENOMEM;
}
inode->i_ino = iunique(dir->i_sb, 100);
d_instantiate(dentry, inode);
inc_nlink(dir);
- inode_dir_notify(dir, DN_CREATE);
+ fsnotify_mkdir(dir, dentry);
return 0;
out_err:
printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
- __FILE__, __FUNCTION__, dentry->d_name.name);
+ __FILE__, __func__, dentry->d_name.name);
return -ENOMEM;
}
if ((error = rpc_lookup_parent(path, nd)) != 0)
return ERR_PTR(error);
- dentry = rpc_lookup_create(nd->dentry, nd->last.name, nd->last.len, 1);
+ dentry = rpc_lookup_create(nd->path.dentry, nd->last.name, nd->last.len,
+ 1);
if (IS_ERR(dentry))
rpc_release_path(nd);
return dentry;
}
-
+/**
+ * rpc_mkdir - Create a new directory in rpc_pipefs
+ * @path: path from the rpc_pipefs root to the new directory
+ * @rpc_client: rpc client to associate with this directory
+ *
+ * This creates a directory at the given @path associated with
+ * @rpc_clnt, which will contain a file named "info" with some basic
+ * information about the client, together with any "pipes" that may
+ * later be created using rpc_mkpipe().
+ */
struct dentry *
rpc_mkdir(char *path, struct rpc_clnt *rpc_client)
{
dentry = rpc_lookup_negative(path, &nd);
if (IS_ERR(dentry))
return dentry;
- dir = nd.dentry->d_inode;
+ dir = nd.path.dentry->d_inode;
if ((error = __rpc_mkdir(dir, dentry)) != 0)
goto err_dput;
RPC_I(dentry->d_inode)->private = rpc_client;
err_dput:
dput(dentry);
printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n",
- __FILE__, __FUNCTION__, path, error);
+ __FILE__, __func__, path, error);
dentry = ERR_PTR(error);
goto out;
}
+/**
+ * rpc_rmdir - Remove a directory created with rpc_mkdir()
+ * @dentry: directory to remove
+ */
int
rpc_rmdir(struct dentry *dentry)
{
return error;
}
+/**
+ * rpc_mkpipe - make an rpc_pipefs file for kernel<->userspace communication
+ * @parent: dentry of directory to create new "pipe" in
+ * @name: name of pipe
+ * @private: private data to associate with the pipe, for the caller's use
+ * @ops: operations defining the behavior of the pipe: upcall, downcall,
+ * release_pipe, open_pipe, and destroy_msg.
+ * @flags: rpc_inode flags
+ *
+ * Data is made available for userspace to read by calls to
+ * rpc_queue_upcall(). The actual reads will result in calls to
+ * @ops->upcall, which will be called with the file pointer,
+ * message, and userspace buffer to copy to.
+ *
+ * Writes can come at any time, and do not necessarily have to be
+ * responses to upcalls. They will result in calls to @msg->downcall.
+ *
+ * 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, struct rpc_pipe_ops *ops, int flags)
{
rpci->flags = flags;
rpci->ops = ops;
rpci->nkern_readwriters = 1;
- inode_dir_notify(dir, DN_CREATE);
+ fsnotify_create(dir, dentry);
dget(dentry);
out:
mutex_unlock(&dir->i_mutex);
dput(dentry);
dentry = ERR_PTR(-ENOMEM);
printk(KERN_WARNING "%s: %s() failed to create pipe %s/%s (errno = %d)\n",
- __FILE__, __FUNCTION__, parent->d_name.name, name,
+ __FILE__, __func__, parent->d_name.name, name,
-ENOMEM);
goto out;
}
+EXPORT_SYMBOL_GPL(rpc_mkpipe);
+/**
+ * rpc_unlink - remove a pipe
+ * @dentry: dentry for the pipe, as returned from rpc_mkpipe
+ *
+ * After this call, lookups will no longer find the pipe, and any
+ * attempts to read or write using preexisting opens of the pipe will
+ * return -EPIPE.
+ */
int
rpc_unlink(struct dentry *dentry)
{
dput(parent);
return error;
}
+EXPORT_SYMBOL_GPL(rpc_unlink);
/*
* populate the filesystem
};
static void
-init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
+init_once(void *foo)
{
struct rpc_inode *rpci = (struct rpc_inode *) foo;
sizeof(struct rpc_inode),
0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
- init_once, NULL);
+ init_once);
if (!rpc_inode_cachep)
return -ENOMEM;
err = register_filesystem(&rpc_pipe_fs_type);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff