1 files changed, 43 insertions, 0 deletions

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index f2c7aa878aa4..4a3f55f27ab4 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1318,6 +1318,49 @@ out:
         return ret;
 }
 
+void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
+                           char *data, size_t len)
+{
+        struct address_space *mapping = inode->i_mapping;
+        struct page *page;
+
+        if (locked_page) {
+                page = locked_page;
+        } else {
+                if (i_size_read(inode) == 0)
+                        return;
+                page = find_or_create_page(mapping, 0,
+                                           mapping_gfp_mask(mapping) & ~__GFP_FS);
+                if (!page)
+                        return;
+                if (PageUptodate(page)) {
+                        unlock_page(page);
+                        page_cache_release(page);
+                        return;
+                }
+        }
+
+        dout("fill_inline_data %p %llx.%llx len %lu locked_page %p\n",
+             inode, ceph_vinop(inode), len, locked_page);
+
+        if (len > 0) {
+                void *kaddr = kmap_atomic(page);
+                memcpy(kaddr, data, len);
+                kunmap_atomic(kaddr);
+        }
+
+        if (page != locked_page) {
+                if (len < PAGE_CACHE_SIZE)
+                        zero_user_segment(page, len, PAGE_CACHE_SIZE);
+                else
+                        flush_dcache_page(page);
+
+                SetPageUptodate(page);
+                unlock_page(page);
+                page_cache_release(page);
+        }
+}
+
 static struct vm_operations_struct ceph_vmops = {
         .fault          = ceph_filemap_fault,
         .page_mkwrite   = ceph_page_mkwrite,