10b86a832SChris Mason /* 20b86a832SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 30b86a832SChris Mason * 40b86a832SChris Mason * This program is free software; you can redistribute it and/or 50b86a832SChris Mason * modify it under the terms of the GNU General Public 60b86a832SChris Mason * License v2 as published by the Free Software Foundation. 70b86a832SChris Mason * 80b86a832SChris Mason * This program is distributed in the hope that it will be useful, 90b86a832SChris Mason * but WITHOUT ANY WARRANTY; without even the implied warranty of 100b86a832SChris Mason * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 110b86a832SChris Mason * General Public License for more details. 120b86a832SChris Mason * 130b86a832SChris Mason * You should have received a copy of the GNU General Public 140b86a832SChris Mason * License along with this program; if not, write to the 150b86a832SChris Mason * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 160b86a832SChris Mason * Boston, MA 021110-1307, USA. 170b86a832SChris Mason */ 180b86a832SChris Mason 190b86a832SChris Mason #ifndef __BTRFS_VOLUMES_ 200b86a832SChris Mason #define __BTRFS_VOLUMES_ 210b86a832SChris Mason struct btrfs_device { 220b86a832SChris Mason struct list_head dev_list; 230b86a832SChris Mason struct btrfs_root *dev_root; 240b86a832SChris Mason struct btrfs_key dev_key; 250b86a832SChris Mason 260b86a832SChris Mason struct block_device *bdev; 270b86a832SChris Mason 280b86a832SChris Mason /* the internal btrfs device id */ 290b86a832SChris Mason u64 devid; 300b86a832SChris Mason 310b86a832SChris Mason /* size of the device */ 320b86a832SChris Mason u64 total_bytes; 330b86a832SChris Mason 340b86a832SChris Mason /* bytes used */ 350b86a832SChris Mason u64 bytes_used; 360b86a832SChris Mason 370b86a832SChris Mason /* optimal io alignment for this device */ 380b86a832SChris Mason u32 io_align; 390b86a832SChris Mason 400b86a832SChris Mason /* optimal io width for this device */ 410b86a832SChris Mason u32 io_width; 420b86a832SChris Mason 430b86a832SChris Mason /* minimal io size for this device */ 440b86a832SChris Mason u32 sector_size; 450b86a832SChris Mason 460b86a832SChris Mason /* the kernel device number */ 470b86a832SChris Mason u64 rdev; 480b86a832SChris Mason 490b86a832SChris Mason /* type and info about this device */ 500b86a832SChris Mason u64 type; 510b86a832SChris Mason 520b86a832SChris Mason /* partition number, 0 for whole dev */ 530b86a832SChris Mason int partition; 540b86a832SChris Mason 550b86a832SChris Mason /* length of the name data at the end of the item */ 560b86a832SChris Mason int name_len; 570b86a832SChris Mason 580b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 590b86a832SChris Mason u8 uuid[BTRFS_DEV_UUID_SIZE]; 600b86a832SChris Mason 610b86a832SChris Mason char *name; 620b86a832SChris Mason }; 630b86a832SChris Mason 640b86a832SChris Mason int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, 650b86a832SChris Mason struct btrfs_device *device, 660b86a832SChris Mason u64 owner, u64 num_bytes, u64 *start); 670b86a832SChris Mason int btrfs_map_block(struct btrfs_mapping_tree *map_tree, 680b86a832SChris Mason u64 logical, u64 *phys, u64 *length, 690b86a832SChris Mason struct btrfs_device **dev); 700b86a832SChris Mason int btrfs_read_sys_array(struct btrfs_root *root); 710b86a832SChris Mason int btrfs_read_chunk_tree(struct btrfs_root *root); 720b86a832SChris Mason int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, 730b86a832SChris Mason struct btrfs_root *extent_root, u64 *start, 746324fbf3SChris Mason u64 *num_bytes, u64 type); 750b86a832SChris Mason void btrfs_mapping_init(struct btrfs_mapping_tree *tree); 760b86a832SChris Mason void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); 770b86a832SChris Mason int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio); 780b86a832SChris Mason #endif 79