| /* |
| * 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_H__ |
| #define __BTRFS_VOLUMES_H__ |
| |
| #include "kerncompat.h" |
| #include "ctree.h" |
| |
| #define BTRFS_STRIPE_LEN (64 * 1024) |
| |
| struct btrfs_device { |
| struct list_head dev_list; |
| struct btrfs_root *dev_root; |
| struct btrfs_fs_devices *fs_devices; |
| |
| u64 total_ios; |
| |
| int fd; |
| |
| int writeable; |
| |
| char *name; |
| |
| /* these are read off the super block, only in the progs */ |
| char *label; |
| u64 total_devs; |
| u64 super_bytes_used; |
| |
| u64 generation; |
| |
| /* 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_UUID_SIZE]; |
| }; |
| |
| struct btrfs_fs_devices { |
| u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| |
| /* the device with this id has the most recent copy 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; |
| |
| int seeding; |
| struct btrfs_fs_devices *seed; |
| }; |
| |
| struct btrfs_bio_stripe { |
| struct btrfs_device *dev; |
| u64 physical; |
| }; |
| |
| struct btrfs_multi_bio { |
| int error; |
| int num_stripes; |
| struct btrfs_bio_stripe stripes[]; |
| }; |
| |
| struct map_lookup { |
| struct cache_extent ce; |
| u64 type; |
| int io_align; |
| int io_width; |
| int stripe_len; |
| int sector_size; |
| int num_stripes; |
| int sub_stripes; |
| struct btrfs_bio_stripe stripes[]; |
| }; |
| |
| #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \ |
| (sizeof(struct btrfs_bio_stripe) * (n))) |
| #define btrfs_map_lookup_size(n) (sizeof(struct map_lookup) + \ |
| (sizeof(struct btrfs_bio_stripe) * (n))) |
| |
| /* |
| * Restriper's general type filter |
| */ |
| #define BTRFS_BALANCE_DATA (1ULL << 0) |
| #define BTRFS_BALANCE_SYSTEM (1ULL << 1) |
| #define BTRFS_BALANCE_METADATA (1ULL << 2) |
| |
| #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ |
| BTRFS_BALANCE_SYSTEM | \ |
| BTRFS_BALANCE_METADATA) |
| |
| #define BTRFS_BALANCE_FORCE (1ULL << 3) |
| #define BTRFS_BALANCE_RESUME (1ULL << 4) |
| |
| /* |
| * Balance filters |
| */ |
| #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0) |
| #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1) |
| #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2) |
| #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) |
| #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) |
| #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) |
| |
| /* |
| * Profile changing flags. When SOFT is set we won't relocate chunk if |
| * it already has the target profile (even though it may be |
| * half-filled). |
| */ |
| #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) |
| #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9) |
| |
| #define BTRFS_RAID5_P_STRIPE ((u64)-2) |
| #define BTRFS_RAID6_Q_STRIPE ((u64)-1) |
| |
| |
| int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, |
| u64 logical, u64 *length, u64 *type, |
| struct btrfs_multi_bio **multi_ret, int mirror_num, |
| u64 **raid_map); |
| int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, |
| u64 logical, u64 *length, |
| struct btrfs_multi_bio **multi_ret, int mirror_num, |
| u64 **raid_map_ret); |
| int btrfs_next_metadata(struct btrfs_mapping_tree *map_tree, u64 *logical, |
| u64 *size); |
| int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, |
| u64 chunk_start, u64 physical, u64 devid, |
| u64 **logical, int *naddrs, int *stripe_len); |
| 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_alloc_data_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_update_device(struct btrfs_trans_handle *trans, |
| 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, int super_recover); |
| int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len); |
| struct list_head *btrfs_scanned_uuids(void); |
| int btrfs_add_system_chunk(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct btrfs_key *key, |
| struct btrfs_chunk *chunk, int item_size); |
| int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); |
| struct btrfs_device * |
| btrfs_find_device_by_devid(struct btrfs_fs_devices *fs_devices, |
| u64 devid, int instance); |
| struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid, |
| u8 *uuid, u8 *fsid); |
| int write_raid56_with_parity(struct btrfs_fs_info *info, |
| struct extent_buffer *eb, |
| struct btrfs_multi_bio *multi, |
| u64 stripe_len, u64 *raid_map); |
| #endif |