ext3: Wait for proper transaction commit on fsync

[safe/jmp/linux-2.6] / fs / afs / write.c

diff --git a/fs/afs/write.c b/fs/afs/write.c
index d6b85da..c63a3c8 100644 (file)
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -144,7 +144,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
        candidate->state = AFS_WBACK_PENDING;
        init_waitqueue_head(&candidate->waitq);
 
-       page = __grab_cache_page(mapping, index);
+       page = grab_cache_page_write_begin(mapping, index, flags);
        if (!page) {
                kfree(candidate);
                return -ENOMEM;
@@ -712,7 +712,6 @@ int afs_writeback_all(struct afs_vnode *vnode)
                .bdi            = mapping->backing_dev_info,
                .sync_mode      = WB_SYNC_ALL,
                .nr_to_write    = LONG_MAX,
-               .for_writepages = 1,
                .range_cyclic   = 1,
        };
        int ret;
@@ -780,3 +779,24 @@ int afs_fsync(struct file *file, struct dentry *dentry, int datasync)
        _leave(" = %d", ret);
        return ret;
 }
+
+/*
+ * notification that a previously read-only page is about to become writable
+ * - if it returns an error, the caller will deliver a bus error signal
+ */
+int afs_page_mkwrite(struct vm_area_struct *vma, struct page *page)
+{
+       struct afs_vnode *vnode = AFS_FS_I(vma->vm_file->f_mapping->host);
+
+       _enter("{{%x:%u}},{%lx}",
+              vnode->fid.vid, vnode->fid.vnode, page->index);
+
+       /* wait for the page to be written to the cache before we allow it to
+        * be modified */
+#ifdef CONFIG_AFS_FSCACHE
+       fscache_wait_on_page_write(vnode->cache, page);
+#endif
+
+       _leave(" = 0");
+       return 0;
+}