From 27e6c7a3ce29ae5fa5bec4ed5917f8508bfac120 Mon Sep 17 00:00:00 2001
From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Sun, 26 Dec 2010 16:28:28 +0900
Subject: nilfs2: mark buffer heads as delayed until the data is written to
disk
Nilfs does not allocate new blocks on disk until they are actually
written to. To implement fiemap, we need to deal with such blocks.
To allow successive fiemap patch to distinguish mapped but unallocated
regions, this marks buffer heads of those new blocks as delayed and
clears the flag after the blocks are written to disk.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
---
fs/nilfs2/inode.c | 1 +
fs/nilfs2/segment.c | 2 ++
2 files changed, 3 insertions(+)
(limited to 'fs')
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 550b1788981e..1a546a86d7a7 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -104,6 +104,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
nilfs_transaction_commit(inode->i_sb); /* never fails */
/* Error handling should be detailed */
set_buffer_new(bh_result);
+ set_buffer_delay(bh_result);
map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed
to proper value */
} else if (ret == -ENOENT) {
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index d3d2f4396f72..efc7d0a1bbf7 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1763,6 +1763,7 @@ static void nilfs_clear_copied_buffers(struct list_head *list, int err)
if (!err) {
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
+ clear_buffer_delay(bh);
clear_buffer_nilfs_volatile(bh);
}
brelse(bh); /* for b_assoc_buffers */
@@ -1889,6 +1890,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
b_assoc_buffers) {
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
+ clear_buffer_delay(bh);
clear_buffer_nilfs_volatile(bh);
clear_buffer_nilfs_redirected(bh);
if (bh == segbuf->sb_super_root) {
--
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