In prep for the new fscache netfs API, refactor nfs_readpage()
and nfs_readpages() for future patches. No functional change.
Signed-off-by: Dave Wysochanski <[email protected]>
---
fs/nfs/read.c | 45 +++++++++++++++++++++++----------------------
1 file changed, 23 insertions(+), 22 deletions(-)
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index eb854f1f86e2..dd92156e27c5 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -314,7 +314,7 @@ int nfs_readpage(struct file *file, struct page *page)
{
struct nfs_open_context *ctx;
struct inode *inode = page_file_mapping(page)->host;
- int error;
+ int ret;
dprintk("NFS: nfs_readpage (%p %ld@%lu)\n",
page, PAGE_SIZE, page_index(page));
@@ -328,18 +328,18 @@ int nfs_readpage(struct file *file, struct page *page)
* be any new pending writes generated at this point
* for this page (other pages can be written to).
*/
- error = nfs_wb_page(inode, page);
- if (error)
+ ret = nfs_wb_page(inode, page);
+ if (ret)
goto out_unlock;
if (PageUptodate(page))
goto out_unlock;
- error = -ESTALE;
+ ret = -ESTALE;
if (NFS_STALE(inode))
goto out_unlock;
if (file == NULL) {
- error = -EBADF;
+ ret = -EBADF;
ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
if (ctx == NULL)
goto out_unlock;
@@ -347,24 +347,24 @@ int nfs_readpage(struct file *file, struct page *page)
ctx = get_nfs_open_context(nfs_file_open_context(file));
if (!IS_SYNC(inode)) {
- error = nfs_readpage_from_fscache(ctx, inode, page);
- if (error == 0)
+ ret = nfs_readpage_from_fscache(ctx, inode, page);
+ if (ret == 0)
goto out;
}
xchg(&ctx->error, 0);
- error = nfs_readpage_async(ctx, inode, page);
- if (!error) {
- error = wait_on_page_locked_killable(page);
- if (!PageUptodate(page) && !error)
- error = xchg(&ctx->error, 0);
+ ret = nfs_readpage_async(ctx, inode, page);
+ if (!ret) {
+ ret = wait_on_page_locked_killable(page);
+ if (!PageUptodate(page) && !ret)
+ ret = xchg(&ctx->error, 0);
}
out:
put_nfs_open_context(ctx);
- return error;
+ return ret;
out_unlock:
unlock_page(page);
- return error;
+ return ret;
}
struct nfs_readdesc {
@@ -404,17 +404,15 @@ struct nfs_readdesc {
return error;
}
-int nfs_readpages(struct file *filp, struct address_space *mapping,
+int nfs_readpages(struct file *file, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
struct nfs_pageio_descriptor pgio;
struct nfs_pgio_mirror *pgm;
- struct nfs_readdesc desc = {
- .pgio = &pgio,
- };
+ struct nfs_readdesc desc;
struct inode *inode = mapping->host;
unsigned long npages;
- int ret = -ESTALE;
+ int ret;
dprintk("NFS: nfs_readpages (%s/%Lu %d)\n",
inode->i_sb->s_id,
@@ -422,15 +420,17 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
nr_pages);
nfs_inc_stats(inode, NFSIOS_VFSREADPAGES);
+ ret = -ESTALE;
if (NFS_STALE(inode))
goto out;
- if (filp == NULL) {
+ if (file == NULL) {
+ ret = -EBADF;
desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
if (desc.ctx == NULL)
- return -EBADF;
+ goto out;
} else
- desc.ctx = get_nfs_open_context(nfs_file_open_context(filp));
+ desc.ctx = get_nfs_open_context(nfs_file_open_context(file));
/* attempt to read as many of the pages as possible from the cache
* - this returns -ENOBUFS immediately if the cookie is negative
@@ -440,6 +440,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
if (ret == 0)
goto read_complete; /* all pages were read */
+ desc.pgio = &pgio;
nfs_pageio_init_read(&pgio, inode, false,
&nfs_async_read_completion_ops);
--
1.8.3.1