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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>
This commit is contained in:
Chuck Lever 2006-06-20 12:56:31 -04:00 committed by Trond Myklebust
parent 51a7bc6cae
commit 9c93ab7dff
1 changed files with 15 additions and 8 deletions
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23
fs/nfs/direct.c
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@ -126,16 +126,21 @@ ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_
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 @@ static inline int nfs_get_user_pages(int rw, unsigned long user_addr, size_t siz
* 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 @@ out:
*/
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 @@ static void nfs_direct_read_result(struct rpc_task *task, void *calldata)
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 @@ static void nfs_direct_free_writedata(struct nfs_direct_req *dreq)
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)