Btrfs: avoid delayed metadata items during commits
authorChris Mason <chris.mason@oracle.com>
Fri, 17 Jun 2011 20:14:09 +0000 (16:14 -0400)
committerChris Mason <chris.mason@oracle.com>
Fri, 17 Jun 2011 20:38:47 +0000 (16:38 -0400)
commite999376f094162aa425ae749aa1df95ab928d010
tree080d4a2a20d8d7e7ea8b36f63150827b970da715
parent35a30d7ce54e087d8025a725d4e5a2fdee723a9f
Btrfs: avoid delayed metadata items during commits

Snapshot creation has two phases.  One is the initial snapshot setup,
and the second is done during commit, while nobody is allowed to modify
the root we are snapshotting.

The delayed metadata insertion code can break that rule, it does a
delayed inode update on the inode of the parent of the snapshot,
and delayed directory item insertion.

This makes sure to run the pending delayed operations before we
record the snapshot root, which avoids corruptions.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/delayed-inode.c
fs/btrfs/delayed-inode.h
fs/btrfs/transaction.c