ext4:Fix credits computing for indirect mapped files.

Submitted by Yongqiang Yang on March 25, 2011, 1:10 p.m.

Details

Message ID 1301058605-29978-1-git-send-email-xiaoqiangnk@gmail.com
State Superseded, archived
Headers show

Commit Message

Yongqiang Yang March 25, 2011, 1:10 p.m.
Either the first block or the last one could be not aligned with
block boundary, 1 block is needed to fix it.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
---
 fs/ext4/inode.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

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diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 67e7a3c..7193f23 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5380,11 +5380,11 @@  static int ext4_indirect_trans_blocks(struct inode *inode, int nrblocks,
 	if (chunk) {
 		/*
 		 * With N contiguous data blocks, it need at most
-		 * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) indirect blocks
+		 * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1 indirect blocks
 		 * 2 dindirect blocks
 		 * 1 tindirect block
 		 */
-		indirects = nrblocks / EXT4_ADDR_PER_BLOCK(inode->i_sb);
+		indirects = nrblocks / EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1;
 		return indirects + 3;
 	}
 	/*