From 200b0700420a78c3ade543761f0901985f41f96b Mon Sep 17 00:00:00 2001
From: Boaz Harrosh <bharrosh@panasas.com>
Date: Mon, 22 Mar 2010 11:23:40 +0200
Subject: [PATCH] exofs: Add default address_space_operations
All vectors of address_space_operations should be initialized
by the filesystem. Add the missing parts.
This is actually an optimization, by using
__set_page_dirty_nobuffers. The default, in case of NULL,
would be __set_page_dirty_buffers which has these extar if(s).
.releasepage && .invalidatepage should both not be called
because page_private() is NULL in exofs. Put a WARN_ON if
they are called, to indicate the Kernel has changed in this
regard, if when it does.
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
---
fs/exofs/inode.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 76d2a79ef93e8..9507283be3ada 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -755,6 +755,21 @@ static int exofs_write_end(struct file *file, struct address_space *mapping,
return ret;
}
+static int exofs_releasepage(struct page *page, gfp_t gfp)
+{
+ EXOFS_DBGMSG("page 0x%lx\n", page->index);
+ WARN_ON(1);
+ return try_to_free_buffers(page);
+}
+
+static void exofs_invalidatepage(struct page *page, unsigned long offset)
+{
+ EXOFS_DBGMSG("page_has_buffers=>%d\n", page_has_buffers(page));
+ WARN_ON(1);
+
+ block_invalidatepage(page, offset);
+}
+
const struct address_space_operations exofs_aops = {
.readpage = exofs_readpage,
.readpages = exofs_readpages,
@@ -762,6 +777,21 @@ const struct address_space_operations exofs_aops = {
.writepages = exofs_writepages,
.write_begin = exofs_write_begin_export,
.write_end = exofs_write_end,
+ .releasepage = exofs_releasepage,
+ .set_page_dirty = __set_page_dirty_nobuffers,
+ .invalidatepage = exofs_invalidatepage,
+
+ /* Not implemented Yet */
+ .bmap = NULL, /* TODO: use osd's OSD_ACT_READ_MAP */
+ .direct_IO = NULL, /* TODO: Should be trivial to do */
+
+ /* With these NULL has special meaning or default is not exported */
+ .sync_page = NULL,
+ .get_xip_mem = NULL,
+ .migratepage = NULL,
+ .launder_page = NULL,
+ .is_partially_uptodate = NULL,
+ .error_remove_page = NULL,
};
/******************************************************************************
--
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