From: Li Zefan Date: Thu, 8 Sep 2011 02:26:51 +0000 (+0800) Subject: Btrfs: fix direct-io vs nodatacow X-Git-Tag: v3.2-rc1~21^2~23^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0dd9592a1aa014b3a01aa2be7e795aae040d65b;p=pandora-kernel.git Btrfs: fix direct-io vs nodatacow To reproduce the bug: # mount -o nodatacow /dev/sda7 /mnt/ # dd if=/dev/zero of=/mnt/tmp bs=4K count=1 1+0 records in 1+0 records out 4096 bytes (4.1 kB) copied, 0.000136115 s, 30.1 MB/s # dd if=/dev/zero of=/mnt/tmp bs=4K count=1 conv=notrunc oflag=direct dd: writing `/mnt/tmp': Input/output error 1+0 records in 0+0 records out btrfs_ordered_update_i_size() may return 1, but btrfs_endio_direct_write() mistakenly takes it as an error. Signed-off-by: Li Zefan --- Reading git-diff-tree failed