nilfs2: always set back pointer to host inode in mapping->host
In the current nilfs, page cache for btree nodes and meta data files
do not set a valid back pointer to the host inode in mapping->host.
This will change it so that every address space in nilfs uses
mapping->host to hold its host inode.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 186cabb..eeb1bc2 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -655,13 +655,10 @@
if (unlikely(page->index > last))
break;
- if (mapping->host) {
- lock_page(page);
- if (!page_has_buffers(page))
- create_empty_buffers(page,
- 1 << inode->i_blkbits, 0);
- unlock_page(page);
- }
+ lock_page(page);
+ if (!page_has_buffers(page))
+ create_empty_buffers(page, 1 << inode->i_blkbits, 0);
+ unlock_page(page);
bh = head = page_buffers(page);
do {
@@ -1503,10 +1500,7 @@
nblocks = le32_to_cpu(finfo->fi_nblocks);
ndatablk = le32_to_cpu(finfo->fi_ndatablk);
- if (buffer_nilfs_node(bh))
- inode = NILFS_BTNC_I(bh->b_page->mapping);
- else
- inode = NILFS_AS_I(bh->b_page->mapping);
+ inode = bh->b_page->mapping->host;
if (mode == SC_LSEG_DSYNC)
sc_op = &nilfs_sc_dsync_ops;