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17 August 2024, 15:42:30 UTC
Revision a39f75214358d715efa21e2bccf5a709d8649144 authored by Miao Xie on 11 September 2011, 14:52:25 UTC, committed by Chris Mason on 11 September 2011, 14:52:25 UTC 
Btrfs: fix wrong nbytes information of the inode
 
If we write some data into the data hole of the file(no preallocation for this
hole), Btrfs will allocate some disk space, and update nbytes of the inode, but
the other element--disk_i_size needn't be updated. At this condition, we must
update inode metadata though disk_i_size is not changed(btrfs_ordered_update_i_size()
return 1).

 # mkfs.btrfs /dev/sdb1
 # mount /dev/sdb1 /mnt
 # touch /mnt/a
 # truncate -s 856002 /mnt/a
 # dd if=/dev/zero of=/mnt/a bs=4K count=1 conv=nocreat,notrunc
 # umount /mnt
 # btrfsck /dev/sdb1
 root 5 inode 257 errors 400
 found 32768 bytes used err is 1

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
1 parent 0c1a98c
History
Tip revision: a39f75214358d715efa21e2bccf5a709d8649144 authored by Miao Xie on 11 September 2011, 14:52:25 UTC
Btrfs: fix wrong nbytes information of the inode
Tip revision: a39f752
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