/* * Copyright (C) 2007 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef __BTRFS_VOLUMES_ #define __BTRFS_VOLUMES_ struct btrfs_device { struct list_head dev_list; struct btrfs_root *dev_root; u64 total_ios; int fd; char *name; /* the internal btrfs device id */ u64 devid; /* size of the device */ u64 total_bytes; /* bytes used */ u64 bytes_used; /* optimal io alignment for this device */ u32 io_align; /* optimal io width for this device */ u32 io_width; /* minimal io size for this device */ u32 sector_size; /* type and info about this device */ u64 type; /* physical drive uuid (or lvm uuid) */ u8 uuid[BTRFS_DEV_UUID_SIZE]; }; struct btrfs_fs_devices { u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ /* the device with this id has the most recent coyp of the super */ u64 latest_devid; u64 latest_trans; u64 lowest_devid; int latest_bdev; int lowest_bdev; struct list_head devices; struct list_head list; }; struct btrfs_bio_stripe { struct btrfs_device *dev; u64 physical; }; struct btrfs_multi_bio { int error; int num_stripes; struct btrfs_bio_stripe stripes[]; }; #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \ (sizeof(struct btrfs_bio_stripe) * (n))) int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, struct btrfs_device *device, u64 owner, u64 num_bytes, u64 *start); int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, u64 logical, u64 *length, struct btrfs_multi_bio **multi_ret); int btrfs_read_sys_array(struct btrfs_root *root); int btrfs_read_chunk_tree(struct btrfs_root *root); int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root, u64 *start, u64 *num_bytes, u64 type); int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf); int btrfs_add_device(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_device *device); int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags); int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); int btrfs_add_device(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_device *device); int btrfs_scan_one_device(int fd, const char *path, struct btrfs_fs_devices **fs_devices_ret, u64 *total_devs, u64 super_offset); #endif