From 7c5186a4c6ca9c7e2621157d74f86fa07724308b Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Sun, 26 Dec 2010 16:28:28 +0900 Subject: [PATCH] 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 --- fs/nilfs2/inode.c | 1 + fs/nilfs2/segment.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 550b1788981e9..1a546a86d7a7a 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 d3d2f4396f725..efc7d0a1bbf7d 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) { -- 2.39.5