mirror of https://gitee.com/openkylin/linux.git
SUNRPC: cleanup PipeFS redundant RPC inode usage
This patch removes redundant RPC inode references from PipeFS. These places are actually where pipes operations are performed. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky
Trond Myklebust
parent
ba9e097593
commit
d0fe13ba91
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@ -132,28 +132,28 @@ EXPORT_SYMBOL_GPL(rpc_pipe_generic_upcall);
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int
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rpc_queue_upcall(struct inode *inode, struct rpc_pipe_msg *msg)
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{
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struct rpc_inode *rpci = RPC_I(inode);
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struct rpc_pipe *pipe = RPC_I(inode)->pipe;
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int res = -EPIPE;
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spin_lock(&rpci->pipe->lock);
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if (rpci->pipe->ops == NULL)
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spin_lock(&pipe->lock);
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if (pipe->ops == NULL)
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goto out;
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if (rpci->pipe->nreaders) {
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list_add_tail(&msg->list, &rpci->pipe->pipe);
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rpci->pipe->pipelen += msg->len;
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if (pipe->nreaders) {
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list_add_tail(&msg->list, &pipe->pipe);
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pipe->pipelen += msg->len;
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res = 0;
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} else if (rpci->pipe->flags & RPC_PIPE_WAIT_FOR_OPEN) {
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if (list_empty(&rpci->pipe->pipe))
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} else if (pipe->flags & RPC_PIPE_WAIT_FOR_OPEN) {
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if (list_empty(&pipe->pipe))
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queue_delayed_work(rpciod_workqueue,
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&rpci->pipe->queue_timeout,
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&pipe->queue_timeout,
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RPC_UPCALL_TIMEOUT);
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list_add_tail(&msg->list, &rpci->pipe->pipe);
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rpci->pipe->pipelen += msg->len;
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list_add_tail(&msg->list, &pipe->pipe);
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pipe->pipelen += msg->len;
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res = 0;
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}
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out:
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spin_unlock(&rpci->pipe->lock);
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wake_up(&rpci->pipe->waitq);
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spin_unlock(&pipe->lock);
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wake_up(&pipe->waitq);
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return res;
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}
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EXPORT_SYMBOL_GPL(rpc_queue_upcall);
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@ -220,23 +220,23 @@ rpc_destroy_inode(struct inode *inode)
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static int
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rpc_pipe_open(struct inode *inode, struct file *filp)
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{
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struct rpc_inode *rpci = RPC_I(inode);
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struct rpc_pipe *pipe = RPC_I(inode)->pipe;
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int first_open;
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int res = -ENXIO;
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mutex_lock(&inode->i_mutex);
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if (rpci->pipe->ops == NULL)
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if (pipe->ops == NULL)
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goto out;
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first_open = rpci->pipe->nreaders == 0 && rpci->pipe->nwriters == 0;
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if (first_open && rpci->pipe->ops->open_pipe) {
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res = rpci->pipe->ops->open_pipe(inode);
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first_open = pipe->nreaders == 0 && pipe->nwriters == 0;
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if (first_open && pipe->ops->open_pipe) {
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res = pipe->ops->open_pipe(inode);
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if (res)
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goto out;
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}
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if (filp->f_mode & FMODE_READ)
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rpci->pipe->nreaders++;
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pipe->nreaders++;
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if (filp->f_mode & FMODE_WRITE)
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rpci->pipe->nwriters++;
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pipe->nwriters++;
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res = 0;
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out:
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mutex_unlock(&inode->i_mutex);
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@ -287,39 +287,39 @@ static ssize_t
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rpc_pipe_read(struct file *filp, char __user *buf, size_t len, loff_t *offset)
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{
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struct inode *inode = filp->f_path.dentry->d_inode;
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struct rpc_inode *rpci = RPC_I(inode);
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struct rpc_pipe *pipe = RPC_I(inode)->pipe;
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struct rpc_pipe_msg *msg;
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int res = 0;
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mutex_lock(&inode->i_mutex);
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if (rpci->pipe->ops == NULL) {
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if (pipe->ops == NULL) {
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res = -EPIPE;
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goto out_unlock;
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}
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msg = filp->private_data;
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if (msg == NULL) {
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spin_lock(&rpci->pipe->lock);
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if (!list_empty(&rpci->pipe->pipe)) {
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msg = list_entry(rpci->pipe->pipe.next,
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spin_lock(&pipe->lock);
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if (!list_empty(&pipe->pipe)) {
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msg = list_entry(pipe->pipe.next,
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struct rpc_pipe_msg,
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list);
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list_move(&msg->list, &rpci->pipe->in_upcall);
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rpci->pipe->pipelen -= msg->len;
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list_move(&msg->list, &pipe->in_upcall);
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pipe->pipelen -= msg->len;
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filp->private_data = msg;
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msg->copied = 0;
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}
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spin_unlock(&rpci->pipe->lock);
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spin_unlock(&pipe->lock);
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if (msg == NULL)
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goto out_unlock;
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}
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/* NOTE: it is up to the callback to update msg->copied */
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res = rpci->pipe->ops->upcall(filp, msg, buf, len);
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res = pipe->ops->upcall(filp, msg, buf, len);
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if (res < 0 || msg->len == msg->copied) {
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filp->private_data = NULL;
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spin_lock(&rpci->pipe->lock);
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spin_lock(&pipe->lock);
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list_del_init(&msg->list);
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spin_unlock(&rpci->pipe->lock);
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rpci->pipe->ops->destroy_msg(msg);
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spin_unlock(&pipe->lock);
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pipe->ops->destroy_msg(msg);
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}
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out_unlock:
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mutex_unlock(&inode->i_mutex);
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@ -330,13 +330,13 @@ static ssize_t
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rpc_pipe_write(struct file *filp, const char __user *buf, size_t len, loff_t *offset)
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{
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struct inode *inode = filp->f_path.dentry->d_inode;
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struct rpc_inode *rpci = RPC_I(inode);
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struct rpc_pipe *pipe = RPC_I(inode)->pipe;
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int res;
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mutex_lock(&inode->i_mutex);
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res = -EPIPE;
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if (rpci->pipe->ops != NULL)
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res = rpci->pipe->ops->downcall(filp, buf, len);
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if (pipe->ops != NULL)
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res = pipe->ops->downcall(filp, buf, len);
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mutex_unlock(&inode->i_mutex);
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return res;
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}
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@ -344,16 +344,15 @@ rpc_pipe_write(struct file *filp, const char __user *buf, size_t len, loff_t *of
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static unsigned int
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rpc_pipe_poll(struct file *filp, struct poll_table_struct *wait)
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{
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struct rpc_inode *rpci;
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struct rpc_pipe *pipe = RPC_I(filp->f_path.dentry->d_inode)->pipe;
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unsigned int mask = 0;
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rpci = RPC_I(filp->f_path.dentry->d_inode);
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poll_wait(filp, &rpci->pipe->waitq, wait);
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poll_wait(filp, &pipe->waitq, wait);
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mask = POLLOUT | POLLWRNORM;
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if (rpci->pipe->ops == NULL)
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if (pipe->ops == NULL)
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mask |= POLLERR | POLLHUP;
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if (filp->private_data || !list_empty(&rpci->pipe->pipe))
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if (filp->private_data || !list_empty(&pipe->pipe))
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mask |= POLLIN | POLLRDNORM;
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return mask;
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}
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@ -362,23 +361,23 @@ static long
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rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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struct inode *inode = filp->f_path.dentry->d_inode;
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struct rpc_inode *rpci = RPC_I(inode);
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struct rpc_pipe *pipe = RPC_I(inode)->pipe;
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int len;
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switch (cmd) {
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case FIONREAD:
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spin_lock(&rpci->pipe->lock);
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if (rpci->pipe->ops == NULL) {
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spin_unlock(&rpci->pipe->lock);
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spin_lock(&pipe->lock);
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if (pipe->ops == NULL) {
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spin_unlock(&pipe->lock);
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return -EPIPE;
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}
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len = rpci->pipe->pipelen;
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len = pipe->pipelen;
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if (filp->private_data) {
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struct rpc_pipe_msg *msg;
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msg = filp->private_data;
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len += msg->len - msg->copied;
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}
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spin_unlock(&rpci->pipe->lock);
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spin_unlock(&pipe->lock);
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return put_user(len, (int __user *)arg);
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default:
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return -EINVAL;
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@ -808,7 +807,7 @@ static int rpc_rmdir_depopulate(struct dentry *dentry,
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* @private: private data to associate with the pipe, for the caller's use
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* @ops: operations defining the behavior of the pipe: upcall, downcall,
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* release_pipe, open_pipe, and destroy_msg.
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* @flags: rpc_inode flags
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* @flags: rpc_pipe flags
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*
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* Data is made available for userspace to read by calls to
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* rpc_queue_upcall(). The actual reads will result in calls to
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