diff options
| -rw-r--r-- | ctree.h | 28 | ||||
| -rw-r--r-- | volumes.c | 1 |
2 files changed, 29 insertions, 0 deletions
@@ -183,6 +183,12 @@ struct btrfs_dev_item { /* expected generation for this device */ __le64 generation; + /* + * starting byte of this partition on the device, + * to allowr for stripe alignment in the future + */ + __le64 start_offset; + /* grouping information for allocation decisions */ __le32 dev_group; @@ -299,6 +305,9 @@ struct btrfs_super_block { __le64 root; __le64 chunk_root; __le64 log_root; + + /* this will help find the new super based on the log root */ + __le64 log_root_transid; __le64 total_bytes; __le64 bytes_used; __le64 root_dir_objectid; @@ -317,7 +326,11 @@ struct btrfs_super_block { u8 chunk_root_level; u8 log_root_level; struct btrfs_dev_item dev_item; + char label[BTRFS_LABEL_SIZE]; + + /* future expansion */ + __le64 reserved[32]; u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; } __attribute__ ((__packed__)); @@ -446,6 +459,14 @@ struct btrfs_inode_item { __le64 rdev; __le64 flags; + /* modification sequence number for NFS */ + __le64 sequence; + + /* + * a little future expansion, for more than this we can + * just grow the inode item and version it + */ + __le64 reserved[4]; struct btrfs_timespec atime; struct btrfs_timespec ctime; struct btrfs_timespec mtime; @@ -809,6 +830,8 @@ BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); +BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, + start_offset, 64); BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); @@ -943,6 +966,7 @@ BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); /* struct btrfs_inode_item */ BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); +BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); @@ -956,6 +980,8 @@ BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, generation, 64); +BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, + struct btrfs_inode_item, generation, 64); BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, @@ -1357,6 +1383,8 @@ BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, chunk_root_level, 8); BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, log_root, 64); +BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, + log_root_transid, 64); BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, log_root_level, 8); BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, @@ -529,6 +529,7 @@ int btrfs_add_device(struct btrfs_trans_handle *trans, btrfs_set_device_group(leaf, dev_item, 0); btrfs_set_device_seek_speed(leaf, dev_item, 0); btrfs_set_device_bandwidth(leaf, dev_item, 0); + btrfs_set_device_start_offset(leaf, dev_item, 0); ptr = (unsigned long)btrfs_device_uuid(dev_item); write_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE); |