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 <[email protected]> --- fs/nilfs2/inode.c | 1 + fs/nilfs2/segment.c | 2 ++ 2 files changed, 3 insertions(+), 0 deletions(-) diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index bddb4f4..7a18093 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 d3d2f43..efc7d0a 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) { -- 1.7.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
