From 31cd043e1a09c579c4cd38ea432200fbeae6af1f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 17 Jun 2015 01:10:03 -0400 Subject: [PATCH] ufs: beginning of __ufs_truncate_block() massage Use ufs_block_to_path() to find the cutoff path in the block pointers' tree. For now just use the information about the depth (to bypass the fully preserved subtrees); subsequent commits will use the information about actual path. Signed-off-by: Al Viro --- fs/ufs/inode.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c index 43672183fee3..afb0f32b921c 100644 --- a/fs/ufs/inode.c +++ b/fs/ufs/inode.c @@ -1336,14 +1336,22 @@ static void __ufs_truncate_blocks(struct inode *inode) struct ufs_inode_info *ufsi = UFS_I(inode); struct super_block *sb = inode->i_sb; struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + unsigned offsets[4]; + int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); mutex_lock(&ufsi->truncate_mutex); - ufs_trunc_direct(inode); - ufs_trunc_indirect(inode, UFS_IND_BLOCK, + switch (depth) { + case 1: + ufs_trunc_direct(inode); + case 2: + ufs_trunc_indirect(inode, UFS_IND_BLOCK, ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK)); - ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb, + case 3: + ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb, ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK)); - ufs_trunc_tindirect(inode); + case 4: + ufs_trunc_tindirect(inode); + } ufsi->i_lastfrag = DIRECT_FRAGMENT; mutex_unlock(&ufsi->truncate_mutex); } -- 2.45.2