NFS: Clean up write code...
The addition of nfs_page_mkwrite means that We should no longer need to
create requests inside nfs_writepage()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 0d7a77c..0c346d7 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -243,10 +243,7 @@
/*
* Find an associated nfs write request, and prepare to flush it out
- * Returns 1 if there was no write request, or if the request was
- * already tagged by nfs_set_page_dirty.Returns 0 if the request
- * was not tagged.
- * May also return an error if the user signalled nfs_wait_on_request().
+ * May return an error if the user signalled nfs_wait_on_request().
*/
static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
struct page *page)
@@ -261,7 +258,7 @@
req = nfs_page_find_request_locked(page);
if (req == NULL) {
spin_unlock(&inode->i_lock);
- return 1;
+ return 0;
}
if (nfs_lock_request_dontget(req))
break;
@@ -282,7 +279,7 @@
spin_unlock(&inode->i_lock);
nfs_unlock_request(req);
nfs_pageio_complete(pgio);
- return 1;
+ return 0;
}
if (nfs_set_page_writeback(page) != 0) {
spin_unlock(&inode->i_lock);
@@ -290,10 +287,9 @@
}
radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index,
NFS_PAGE_TAG_LOCKED);
- ret = test_bit(PG_NEED_FLUSH, &req->wb_flags);
spin_unlock(&inode->i_lock);
nfs_pageio_add_request(pgio, req);
- return ret;
+ return 0;
}
/*
@@ -302,9 +298,7 @@
static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc)
{
struct nfs_pageio_descriptor mypgio, *pgio;
- struct nfs_open_context *ctx;
struct inode *inode = page->mapping->host;
- unsigned offset;
int err;
nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE);
@@ -320,28 +314,7 @@
nfs_pageio_cond_complete(pgio, page->index);
err = nfs_page_async_flush(pgio, page);
- if (err <= 0)
- goto out;
- err = 0;
- offset = nfs_page_length(page);
- if (!offset)
- goto out;
- nfs_pageio_cond_complete(pgio, page->index);
-
- ctx = nfs_find_open_context(inode, NULL, FMODE_WRITE);
- if (ctx == NULL) {
- err = -EBADF;
- goto out;
- }
- err = nfs_writepage_setup(ctx, page, 0, offset);
- put_nfs_open_context(ctx);
- if (err != 0)
- goto out;
- err = nfs_page_async_flush(pgio, page);
- if (err > 0)
- err = 0;
-out:
if (!wbc->for_writepages)
nfs_pageio_complete(pgio);
return err;
@@ -395,8 +368,6 @@
}
SetPagePrivate(req->wb_page);
set_page_private(req->wb_page, (unsigned long)req);
- if (PageDirty(req->wb_page))
- set_bit(PG_NEED_FLUSH, &req->wb_flags);
nfsi->npages++;
kref_get(&req->wb_kref);
return 0;
@@ -416,8 +387,6 @@
set_page_private(req->wb_page, 0);
ClearPagePrivate(req->wb_page);
radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index);
- if (test_and_clear_bit(PG_NEED_FLUSH, &req->wb_flags))
- __set_page_dirty_nobuffers(req->wb_page);
nfsi->npages--;
if (!nfsi->npages) {
spin_unlock(&inode->i_lock);
@@ -1477,35 +1446,6 @@
return nfs_wb_page_priority(inode, page, FLUSH_STABLE);
}
-int nfs_set_page_dirty(struct page *page)
-{
- struct address_space *mapping = page->mapping;
- struct inode *inode;
- struct nfs_page *req;
- int ret;
-
- if (!mapping)
- goto out_raced;
- inode = mapping->host;
- if (!inode)
- goto out_raced;
- spin_lock(&inode->i_lock);
- req = nfs_page_find_request_locked(page);
- if (req != NULL) {
- /* Mark any existing write requests for flushing */
- ret = !test_and_set_bit(PG_NEED_FLUSH, &req->wb_flags);
- spin_unlock(&inode->i_lock);
- nfs_release_request(req);
- return ret;
- }
- ret = __set_page_dirty_nobuffers(page);
- spin_unlock(&inode->i_lock);
- return ret;
-out_raced:
- return !TestSetPageDirty(page);
-}
-
-
int __init nfs_init_writepagecache(void)
{
nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
