NFS: refactor nfs_direct_free_user_pages
Clean-up and fix a minor bug: the logic was dirtying page cache pages on
both read and write operations.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index e4c9e03..4cb3446 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -126,16 +126,21 @@
return -EINVAL;
}
-static void nfs_free_user_pages(struct page **pages, int npages, int do_dirty)
+static void nfs_direct_dirty_pages(struct page **pages, int npages)
{
int i;
for (i = 0; i < npages; i++) {
struct page *page = pages[i];
- if (do_dirty && !PageCompound(page))
+ if (!PageCompound(page))
set_page_dirty_lock(page);
- page_cache_release(page);
}
- kfree(pages);
+}
+
+static void nfs_direct_release_pages(struct page **pages, int npages)
+{
+ int i;
+ for (i = 0; i < npages; i++)
+ page_cache_release(pages[i]);
}
static inline int nfs_get_user_pages(int rw, unsigned long user_addr, size_t size, struct page ***pages)
@@ -162,7 +167,7 @@
* end of a mapping; return EFAULT.
*/
if (result >= 0) {
- nfs_free_user_pages(*pages, result, 0);
+ nfs_direct_release_pages(*pages, result);
result = -EFAULT;
} else
kfree(*pages);
@@ -238,8 +243,6 @@
*/
static void nfs_direct_complete(struct nfs_direct_req *dreq)
{
- nfs_free_user_pages(dreq->pages, dreq->npages, 1);
-
if (dreq->iocb) {
long res = (long) dreq->error;
if (!res)
@@ -311,8 +314,11 @@
spin_unlock(&dreq->lock);
- if (put_dreq(dreq))
+ if (put_dreq(dreq)) {
+ nfs_direct_dirty_pages(dreq->pages, dreq->npages);
+ nfs_direct_release_pages(dreq->pages, dreq->npages);
nfs_direct_complete(dreq);
+ }
}
static const struct rpc_call_ops nfs_read_direct_ops = {
@@ -422,6 +428,7 @@
list_del(&data->pages);
nfs_writedata_release(data);
}
+ nfs_direct_release_pages(dreq->pages, dreq->npages);
}
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)