The ore need suplied a r4w_get_page/r4w_put_page API
from Filesystem so it can get cache pages to read-into when
writing parial stripes.
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/nfs/objlayout/objio_osd.c | 38 ++++++++++++++++++++++++++++++++++++++
1 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index 3161da6..c807ab9 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -459,6 +459,43 @@ static void _write_done(struct ore_io_state *ios, void *private)
objlayout_write_done(&objios->oir, status, objios->sync);
}
+static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate)
+{
+ struct objio_state *objios = priv;
+ struct nfs_write_data *wdata = objios->oir.rpcdata;
+ pgoff_t index = offset / PAGE_SIZE;
+ struct page *page = find_get_page(wdata->inode->i_mapping, index);
+
+ if (!page) {
+ page = find_or_create_page(wdata->inode->i_mapping,
+ index, GFP_NOFS);
+ if (unlikely(!page)) {
+ dprintk("%s: grab_cache_page Failed index=0x%lx\n",
+ __func__, index);
+ return NULL;
+ }
+ unlock_page(page);
+ }
+ if (PageDirty(page) || PageWriteback(page))
+ *uptodate = true;
+ else
+ *uptodate = PageUptodate(page);
+ dprintk("%s: index=0x%lx uptodate=%d\n", __func__, index, *uptodate);
+ return page;
+}
+
+static void __r4w_put_page(void *priv, struct page *page)
+{
+ dprintk("%s: index=0x%lx\n", __func__, page->index);
+ page_cache_release(page);
+ return;
+}
+
+static const struct _ore_r4w_op _r4w_op = {
+ .get_page = &__r4w_get_page,
+ .put_page = &__r4w_put_page,
+};
+
int objio_write_pagelist(struct nfs_write_data *wdata, int how)
{
struct objio_state *objios;
@@ -472,6 +509,7 @@ int objio_write_pagelist(struct nfs_write_data *wdata, int how)
return ret;
objios->sync = 0 != (how & FLUSH_SYNC);
+ objios->ios->r4w = &_r4w_op;
if (!objios->sync)
objios->ios->done = _write_done;
--
1.7.6.4
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