X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=fs%2Fnfs%2Fread.c;h=40d17987d0e847a87fa4596a9a4c9f39a464288e;hb=441dbb500b4344a8e3125e5aabab4f9dbf72514f;hp=be9e8270f4d7bdaceef2e132a43ddca84c66c81b;hpb=5e4424af9a1f062c6451681dff24a26e27741cc6;p=linux-2.6

diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index be9e8270f4..40d17987d0 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -153,7 +153,7 @@ static void nfs_readpage_release(struct nfs_page *req)
 /*
  * Set up the NFS read request struct
  */
-static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
+static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 		const struct rpc_call_ops *call_ops,
 		unsigned int count, unsigned int offset)
 {
@@ -202,8 +202,10 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 			(unsigned long long)data->args.offset);
 
 	task = rpc_run_task(&task_setup_data);
-	if (!IS_ERR(task))
-		rpc_put_task(task);
+	if (IS_ERR(task))
+		return PTR_ERR(task);
+	rpc_put_task(task);
+	return 0;
 }
 
 static void
@@ -240,6 +242,7 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
 	size_t rsize = NFS_SERVER(inode)->rsize, nbytes;
 	unsigned int offset;
 	int requests = 0;
+	int ret = 0;
 	LIST_HEAD(list);
 
 	nfs_list_remove_request(req);
@@ -251,7 +254,6 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
 		data = nfs_readdata_alloc(1);
 		if (!data)
 			goto out_bad;
-		INIT_LIST_HEAD(&data->pages);
 		list_add(&data->pages, &list);
 		requests++;
 		nbytes -= len;
@@ -262,6 +264,8 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
 	offset = 0;
 	nbytes = count;
 	do {
+		int ret2;
+
 		data = list_entry(list.next, struct nfs_read_data, pages);
 		list_del_init(&data->pages);
 
@@ -269,13 +273,15 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
 
 		if (nbytes < rsize)
 			rsize = nbytes;
-		nfs_read_rpcsetup(req, data, &nfs_read_partial_ops,
+		ret2 = nfs_read_rpcsetup(req, data, &nfs_read_partial_ops,
 				  rsize, offset);
+		if (ret == 0)
+			ret = ret2;
 		offset += rsize;
 		nbytes -= rsize;
 	} while (nbytes != 0);
 
-	return 0;
+	return ret;
 
 out_bad:
 	while (!list_empty(&list)) {
@@ -293,12 +299,12 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
 	struct nfs_page		*req;
 	struct page		**pages;
 	struct nfs_read_data	*data;
+	int ret = -ENOMEM;
 
 	data = nfs_readdata_alloc(npages);
 	if (!data)
 		goto out_bad;
 
-	INIT_LIST_HEAD(&data->pages);
 	pages = data->pagevec;
 	while (!list_empty(head)) {
 		req = nfs_list_entry(head->next);
@@ -309,11 +315,10 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
 	}
 	req = nfs_list_entry(data->pages.next);
 
-	nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0);
-	return 0;
+	return nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0);
 out_bad:
 	nfs_async_read_error(head);
-	return -ENOMEM;
+	return ret;
 }
 
 /*
@@ -324,7 +329,7 @@ int nfs_readpage_result(struct rpc_task *task, struct nfs_read_data *data)
 {
 	int status;
 
-	dprintk("NFS: %s: %5u, (status %d)\n", __FUNCTION__, task->tk_pid,
+	dprintk("NFS: %s: %5u, (status %d)\n", __func__, task->tk_pid,
 			task->tk_status);
 
 	status = NFS_PROTO(data->inode)->read_done(task, data);
@@ -340,26 +345,25 @@ int nfs_readpage_result(struct rpc_task *task, struct nfs_read_data *data)
 	return 0;
 }
 
-static int nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data)
+static void nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data)
 {
 	struct nfs_readargs *argp = &data->args;
 	struct nfs_readres *resp = &data->res;
 
 	if (resp->eof || resp->count == argp->count)
-		return 0;
+		return;
 
 	/* This is a short read! */
 	nfs_inc_stats(data->inode, NFSIOS_SHORTREAD);
 	/* Has the server at least made some progress? */
 	if (resp->count == 0)
-		return 0;
+		return;
 
 	/* Yes, so retry the read at the end of the data */
 	argp->offset += resp->count;
 	argp->pgbase += resp->count;
 	argp->count -= resp->count;
 	rpc_restart_call(task);
-	return -EAGAIN;
 }
 
 /*
@@ -368,29 +372,37 @@ static int nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data)
 static void nfs_readpage_result_partial(struct rpc_task *task, void *calldata)
 {
 	struct nfs_read_data *data = calldata;
-	struct nfs_page *req = data->req;
-	struct page *page = req->wb_page;
  
 	if (nfs_readpage_result(task, data) != 0)
 		return;
+	if (task->tk_status < 0)
+		return;
 
-	if (likely(task->tk_status >= 0)) {
-		nfs_readpage_truncate_uninitialised_page(data);
-		if (nfs_readpage_retry(task, data) != 0)
-			return;
-	}
-	if (unlikely(task->tk_status < 0))
+	nfs_readpage_truncate_uninitialised_page(data);
+	nfs_readpage_retry(task, data);
+}
+
+static void nfs_readpage_release_partial(void *calldata)
+{
+	struct nfs_read_data *data = calldata;
+	struct nfs_page *req = data->req;
+	struct page *page = req->wb_page;
+	int status = data->task.tk_status;
+
+	if (status < 0)
 		SetPageError(page);
+
 	if (atomic_dec_and_test(&req->wb_complete)) {
 		if (!PageError(page))
 			SetPageUptodate(page);
 		nfs_readpage_release(req);
 	}
+	nfs_readdata_release(calldata);
 }
 
 static const struct rpc_call_ops nfs_read_partial_ops = {
 	.rpc_call_done = nfs_readpage_result_partial,
-	.rpc_release = nfs_readdata_release,
+	.rpc_release = nfs_readpage_release_partial,
 };
 
 static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
@@ -425,29 +437,35 @@ static void nfs_readpage_result_full(struct rpc_task *task, void *calldata)
 
 	if (nfs_readpage_result(task, data) != 0)
 		return;
+	if (task->tk_status < 0)
+		return;
 	/*
 	 * Note: nfs_readpage_retry may change the values of
 	 * data->args. In the multi-page case, we therefore need
 	 * to ensure that we call nfs_readpage_set_pages_uptodate()
 	 * first.
 	 */
-	if (likely(task->tk_status >= 0)) {
-		nfs_readpage_truncate_uninitialised_page(data);
-		nfs_readpage_set_pages_uptodate(data);
-		if (nfs_readpage_retry(task, data) != 0)
-			return;
-	}
+	nfs_readpage_truncate_uninitialised_page(data);
+	nfs_readpage_set_pages_uptodate(data);
+	nfs_readpage_retry(task, data);
+}
+
+static void nfs_readpage_release_full(void *calldata)
+{
+	struct nfs_read_data *data = calldata;
+
 	while (!list_empty(&data->pages)) {
 		struct nfs_page *req = nfs_list_entry(data->pages.next);
 
 		nfs_list_remove_request(req);
 		nfs_readpage_release(req);
 	}
+	nfs_readdata_release(calldata);
 }
 
 static const struct rpc_call_ops nfs_read_full_ops = {
 	.rpc_call_done = nfs_readpage_result_full,
-	.rpc_release = nfs_readdata_release,
+	.rpc_release = nfs_readpage_release_full,
 };
 
 /*
@@ -531,7 +549,10 @@ readpage_async_filler(void *data, struct page *page)
 
 	if (len < PAGE_CACHE_SIZE)
 		zero_user_segment(page, len, PAGE_CACHE_SIZE);
-	nfs_pageio_add_request(desc->pgio, new);
+	if (!nfs_pageio_add_request(desc->pgio, new)) {
+		error = desc->pgio->pg_error;
+		goto out_unlock;
+	}
 	return 0;
 out_error:
 	error = PTR_ERR(new);