Если на пункте NFS server support поставить звездочку (компилировать в ядро) то возникает ошибка при компиляции unionfs
Пакет linux-source из репазитория конфигурационный файл стандартный /boot/config-2.6.27-7-generic
CC ubuntu/aufs/hin_or_fuse.o
CC ubuntu/aufs/export.o
LD ubuntu/aufs/aufs.o
LD ubuntu/aufs/built-in.o
CC ubuntu/unionfs/super.o
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c: In function ‘get_hidden_parent’:
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:489: error: invalid use of undefined type ‘struct export_operations’
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c: In function ‘do_get_dentry’:
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:553: warning: passing argument 2 of ‘vfs_readdir’ from incompatible pointer type
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c: In function ‘unionfs_encode_fh’:
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:666: error: invalid use of undefined type ‘struct export_operations’
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c: In function ‘unionfs_decode_fh’:
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:710: error: invalid use of undefined type ‘struct export_operations’
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c: At top level:
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:728: error: variable ‘unionfs_export_ops’ has initializer but incomplete type
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:729: error: unknown field ‘decode_fh’ specified in initializer
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:729: warning: excess elements in struct initializer
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:729: warning: (near initialization for ‘unionfs_export_ops’)
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:730: error: unknown field ‘encode_fh’ specified in initializer
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:731: warning: excess elements in struct initializer
/usr/src/linux-source-2.6.27/ubuntu/unionfs/super.c:731: warning: (near initialization for ‘unionfs_export_ops’)
make[3]: *** [ubuntu/unionfs/super.o] Error 1
make[2]: *** [ubuntu/unionfs] Error 2
make[1]: *** [ubuntu] Error 2
make: *** [sub-make] Error 2