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_ 218790d502SChris Mason 22cea9e445SChris Mason #include <linux/bio.h> 23b2117a39SMiao Xie #include <linux/sort.h> 248b712842SChris Mason #include "async-thread.h" 25442a4f63SStefan Behrens #include "ioctl.h" 26cea9e445SChris Mason 27b2117a39SMiao Xie #define BTRFS_STRIPE_LEN (64 * 1024) 28b2117a39SMiao Xie 29f2984462SChris Mason struct buffer_head; 30ffbd517dSChris Mason struct btrfs_pending_bios { 31ffbd517dSChris Mason struct bio *head; 32ffbd517dSChris Mason struct bio *tail; 33ffbd517dSChris Mason }; 34ffbd517dSChris Mason 350b86a832SChris Mason struct btrfs_device { 360b86a832SChris Mason struct list_head dev_list; 37b3075717SChris Mason struct list_head dev_alloc_list; 382b82032cSYan Zheng struct btrfs_fs_devices *fs_devices; 390b86a832SChris Mason struct btrfs_root *dev_root; 40ffbd517dSChris Mason 41ffbd517dSChris Mason /* regular prio bios */ 42ffbd517dSChris Mason struct btrfs_pending_bios pending_bios; 43ffbd517dSChris Mason /* WRITE_SYNC bios */ 44ffbd517dSChris Mason struct btrfs_pending_bios pending_sync_bios; 45ffbd517dSChris Mason 468b712842SChris Mason int running_pending; 47dfe25020SChris Mason u64 generation; 48b3075717SChris Mason 492b82032cSYan Zheng int writeable; 50dfe25020SChris Mason int in_fs_metadata; 51cd02dca5SChris Mason int missing; 52d5e2003cSJosef Bacik int can_discard; 53b3075717SChris Mason 548790d502SChris Mason spinlock_t io_lock; 550b86a832SChris Mason 560b86a832SChris Mason struct block_device *bdev; 570b86a832SChris Mason 58d4d77629STejun Heo /* the mode sent to blkdev_get */ 5915916de8SChris Mason fmode_t mode; 6015916de8SChris Mason 61606686eeSJosef Bacik struct rcu_string *name; 628a4b83ccSChris Mason 630b86a832SChris Mason /* the internal btrfs device id */ 640b86a832SChris Mason u64 devid; 650b86a832SChris Mason 660b86a832SChris Mason /* size of the device */ 670b86a832SChris Mason u64 total_bytes; 680b86a832SChris Mason 69d6397baeSChris Ball /* size of the disk */ 70d6397baeSChris Ball u64 disk_total_bytes; 71d6397baeSChris Ball 720b86a832SChris Mason /* bytes used */ 730b86a832SChris Mason u64 bytes_used; 740b86a832SChris Mason 750b86a832SChris Mason /* optimal io alignment for this device */ 760b86a832SChris Mason u32 io_align; 770b86a832SChris Mason 780b86a832SChris Mason /* optimal io width for this device */ 790b86a832SChris Mason u32 io_width; 800b86a832SChris Mason 810b86a832SChris Mason /* minimal io size for this device */ 820b86a832SChris Mason u32 sector_size; 830b86a832SChris Mason 840b86a832SChris Mason /* type and info about this device */ 850b86a832SChris Mason u64 type; 860b86a832SChris Mason 870b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 88e17cade2SChris Mason u8 uuid[BTRFS_UUID_SIZE]; 898b712842SChris Mason 90a2de733cSArne Jansen /* per-device scrub information */ 91d9d181c1SStefan Behrens struct scrub_ctx *scrub_device; 92a2de733cSArne Jansen 938b712842SChris Mason struct btrfs_work work; 941f78160cSXiao Guangrong struct rcu_head rcu; 951f78160cSXiao Guangrong struct work_struct rcu_work; 9690519d66SArne Jansen 9790519d66SArne Jansen /* readahead state */ 9890519d66SArne Jansen spinlock_t reada_lock; 9990519d66SArne Jansen atomic_t reada_in_flight; 10090519d66SArne Jansen u64 reada_next; 10190519d66SArne Jansen struct reada_zone *reada_curr_zone; 10290519d66SArne Jansen struct radix_tree_root reada_zones; 10390519d66SArne Jansen struct radix_tree_root reada_extents; 104387125fcSChris Mason 105387125fcSChris Mason /* for sending down flush barriers */ 106387125fcSChris Mason struct bio *flush_bio; 107387125fcSChris Mason struct completion flush_wait; 108387125fcSChris Mason int nobarriers; 109387125fcSChris Mason 110442a4f63SStefan Behrens /* disk I/O failure stats. For detailed description refer to 111442a4f63SStefan Behrens * enum btrfs_dev_stat_values in ioctl.h */ 112733f4fbbSStefan Behrens int dev_stats_valid; 113442a4f63SStefan Behrens int dev_stats_dirty; /* counters need to be written to disk */ 114442a4f63SStefan Behrens atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; 1150b86a832SChris Mason }; 1160b86a832SChris Mason 1178a4b83ccSChris Mason struct btrfs_fs_devices { 1188a4b83ccSChris Mason u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 1198a4b83ccSChris Mason 120d4a78947SWu Fengguang /* the device with this id has the most recent copy of the super */ 1218a4b83ccSChris Mason u64 latest_devid; 1228a4b83ccSChris Mason u64 latest_trans; 1238a4b83ccSChris Mason u64 num_devices; 124a0af469bSChris Mason u64 open_devices; 1252b82032cSYan Zheng u64 rw_devices; 126cd02dca5SChris Mason u64 missing_devices; 1272b82032cSYan Zheng u64 total_rw_bytes; 128d5e2003cSJosef Bacik u64 num_can_discard; 12902db0844SJosef Bacik u64 total_devices; 1308a4b83ccSChris Mason struct block_device *latest_bdev; 131e5e9a520SChris Mason 132e5e9a520SChris Mason /* all of the devices in the FS, protected by a mutex 133e5e9a520SChris Mason * so we can safely walk it to write out the supers without 134e5e9a520SChris Mason * worrying about add/remove by the multi-device code 135e5e9a520SChris Mason */ 136e5e9a520SChris Mason struct mutex device_list_mutex; 1378a4b83ccSChris Mason struct list_head devices; 138b3075717SChris Mason 139b3075717SChris Mason /* devices not currently being allocated */ 140b3075717SChris Mason struct list_head alloc_list; 1418a4b83ccSChris Mason struct list_head list; 1422b82032cSYan Zheng 1432b82032cSYan Zheng struct btrfs_fs_devices *seed; 1442b82032cSYan Zheng int seeding; 1452b82032cSYan Zheng 1462b82032cSYan Zheng int opened; 147c289811cSChris Mason 148c289811cSChris Mason /* set when we find or add a device that doesn't have the 149c289811cSChris Mason * nonrot flag set 150c289811cSChris Mason */ 151c289811cSChris Mason int rotating; 1528a4b83ccSChris Mason }; 1538a4b83ccSChris Mason 154cea9e445SChris Mason struct btrfs_bio_stripe { 155cea9e445SChris Mason struct btrfs_device *dev; 156cea9e445SChris Mason u64 physical; 157fce3bb9aSLi Dongyang u64 length; /* only used for discard mappings */ 158cea9e445SChris Mason }; 159cea9e445SChris Mason 160a1d3c478SJan Schmidt struct btrfs_bio; 161a1d3c478SJan Schmidt typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); 162a1d3c478SJan Schmidt 163a1d3c478SJan Schmidt struct btrfs_bio { 164cea9e445SChris Mason atomic_t stripes_pending; 165cea9e445SChris Mason bio_end_io_t *end_io; 1667d2b4daaSChris Mason struct bio *orig_bio; 167cea9e445SChris Mason void *private; 168a236aed1SChris Mason atomic_t error; 169a236aed1SChris Mason int max_errors; 170cea9e445SChris Mason int num_stripes; 171a1d3c478SJan Schmidt int mirror_num; 172cea9e445SChris Mason struct btrfs_bio_stripe stripes[]; 173cea9e445SChris Mason }; 174cea9e445SChris Mason 175b2117a39SMiao Xie struct btrfs_device_info { 176b2117a39SMiao Xie struct btrfs_device *dev; 177b2117a39SMiao Xie u64 dev_offset; 178b2117a39SMiao Xie u64 max_avail; 17973c5de00SArne Jansen u64 total_avail; 180b2117a39SMiao Xie }; 181b2117a39SMiao Xie 1821abe9b8aSliubo struct map_lookup { 1831abe9b8aSliubo u64 type; 1841abe9b8aSliubo int io_align; 1851abe9b8aSliubo int io_width; 1861abe9b8aSliubo int stripe_len; 1871abe9b8aSliubo int sector_size; 1881abe9b8aSliubo int num_stripes; 1891abe9b8aSliubo int sub_stripes; 1901abe9b8aSliubo struct btrfs_bio_stripe stripes[]; 1911abe9b8aSliubo }; 1921abe9b8aSliubo 193a2de733cSArne Jansen #define map_lookup_size(n) (sizeof(struct map_lookup) + \ 194a2de733cSArne Jansen (sizeof(struct btrfs_bio_stripe) * (n))) 195a2de733cSArne Jansen 196f43ffb60SIlya Dryomov /* 197f43ffb60SIlya Dryomov * Restriper's general type filter 198f43ffb60SIlya Dryomov */ 199f43ffb60SIlya Dryomov #define BTRFS_BALANCE_DATA (1ULL << 0) 200f43ffb60SIlya Dryomov #define BTRFS_BALANCE_SYSTEM (1ULL << 1) 201f43ffb60SIlya Dryomov #define BTRFS_BALANCE_METADATA (1ULL << 2) 202f43ffb60SIlya Dryomov 203f43ffb60SIlya Dryomov #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ 204f43ffb60SIlya Dryomov BTRFS_BALANCE_SYSTEM | \ 205f43ffb60SIlya Dryomov BTRFS_BALANCE_METADATA) 206e4d8ec0fSIlya Dryomov 207e4d8ec0fSIlya Dryomov #define BTRFS_BALANCE_FORCE (1ULL << 3) 20859641015SIlya Dryomov #define BTRFS_BALANCE_RESUME (1ULL << 4) 209e4d8ec0fSIlya Dryomov 210ed25e9b2SIlya Dryomov /* 211ed25e9b2SIlya Dryomov * Balance filters 212ed25e9b2SIlya Dryomov */ 213ed25e9b2SIlya Dryomov #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0) 2145ce5b3c0SIlya Dryomov #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1) 215409d404bSIlya Dryomov #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2) 21694e60d5aSIlya Dryomov #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) 217ea67176aSIlya Dryomov #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) 218f43ffb60SIlya Dryomov 219cfa4c961SIlya Dryomov /* 220cfa4c961SIlya Dryomov * Profile changing flags. When SOFT is set we won't relocate chunk if 221cfa4c961SIlya Dryomov * it already has the target profile (even though it may be 222cfa4c961SIlya Dryomov * half-filled). 223cfa4c961SIlya Dryomov */ 224e4d8ec0fSIlya Dryomov #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) 225cfa4c961SIlya Dryomov #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9) 226e4d8ec0fSIlya Dryomov 227c9e9f97bSIlya Dryomov struct btrfs_balance_args; 22819a39dceSIlya Dryomov struct btrfs_balance_progress; 229c9e9f97bSIlya Dryomov struct btrfs_balance_control { 230c9e9f97bSIlya Dryomov struct btrfs_fs_info *fs_info; 231c9e9f97bSIlya Dryomov 232c9e9f97bSIlya Dryomov struct btrfs_balance_args data; 233c9e9f97bSIlya Dryomov struct btrfs_balance_args meta; 234c9e9f97bSIlya Dryomov struct btrfs_balance_args sys; 235c9e9f97bSIlya Dryomov 236c9e9f97bSIlya Dryomov u64 flags; 23719a39dceSIlya Dryomov 23819a39dceSIlya Dryomov struct btrfs_balance_progress stat; 239c9e9f97bSIlya Dryomov }; 240c9e9f97bSIlya Dryomov 2416d07bcecSMiao Xie int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, 2426d07bcecSMiao Xie u64 end, u64 *length); 2436d07bcecSMiao Xie 244a1d3c478SJan Schmidt #define btrfs_bio_size(n) (sizeof(struct btrfs_bio) + \ 245cea9e445SChris Mason (sizeof(struct btrfs_bio_stripe) * (n))) 246cea9e445SChris Mason 2470b86a832SChris Mason int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, 2480b86a832SChris Mason struct btrfs_device *device, 249e17cade2SChris Mason u64 chunk_tree, u64 chunk_objectid, 2502b82032cSYan Zheng u64 chunk_offset, u64 start, u64 num_bytes); 251cea9e445SChris Mason int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, 252cea9e445SChris Mason u64 logical, u64 *length, 253a1d3c478SJan Schmidt struct btrfs_bio **bbio_ret, int mirror_num); 254a512bbf8SYan Zheng int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, 255a512bbf8SYan Zheng u64 chunk_start, u64 physical, u64 devid, 256a512bbf8SYan Zheng u64 **logical, int *naddrs, int *stripe_len); 257e4404d6eSYan Zheng int btrfs_read_sys_array(struct btrfs_root *root); 2580b86a832SChris Mason int btrfs_read_chunk_tree(struct btrfs_root *root); 2590b86a832SChris Mason int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, 2602b82032cSYan Zheng struct btrfs_root *extent_root, u64 type); 2610b86a832SChris Mason void btrfs_mapping_init(struct btrfs_mapping_tree *tree); 2620b86a832SChris Mason void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); 263f188591eSChris Mason int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, 2648b712842SChris Mason int mirror_num, int async_submit); 2658a4b83ccSChris Mason int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, 26697288f2cSChristoph Hellwig fmode_t flags, void *holder); 26797288f2cSChristoph Hellwig int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, 2688a4b83ccSChris Mason struct btrfs_fs_devices **fs_devices_ret); 2698a4b83ccSChris Mason int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); 270143bede5SJeff Mahoney void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices); 2718a4b83ccSChris Mason int btrfs_add_device(struct btrfs_trans_handle *trans, 2728a4b83ccSChris Mason struct btrfs_root *root, 2738a4b83ccSChris Mason struct btrfs_device *device); 274a061fc8dSChris Mason int btrfs_rm_device(struct btrfs_root *root, char *device_path); 275143bede5SJeff Mahoney void btrfs_cleanup_fs_uuids(void); 276f188591eSChris Mason int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len); 2778f18cf13SChris Mason int btrfs_grow_device(struct btrfs_trans_handle *trans, 2788f18cf13SChris Mason struct btrfs_device *device, u64 new_size); 2798f18cf13SChris Mason struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid, 2802b82032cSYan Zheng u8 *uuid, u8 *fsid); 2818f18cf13SChris Mason int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); 282788f20ebSChris Mason int btrfs_init_new_device(struct btrfs_root *root, char *path); 283c9e9f97bSIlya Dryomov int btrfs_balance(struct btrfs_balance_control *bctl, 284c9e9f97bSIlya Dryomov struct btrfs_ioctl_balance_args *bargs); 2852b6ba629SIlya Dryomov int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); 28668310a5eSIlya Dryomov int btrfs_recover_balance(struct btrfs_fs_info *fs_info); 287837d5b6eSIlya Dryomov int btrfs_pause_balance(struct btrfs_fs_info *fs_info); 288a7e99c69SIlya Dryomov int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); 2892b82032cSYan Zheng int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); 290125ccb0aSLi Zefan int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, 291ba1bf481SJosef Bacik u64 *start, u64 *max_avail); 292442a4f63SStefan Behrens void btrfs_dev_stat_print_on_error(struct btrfs_device *device); 293442a4f63SStefan Behrens void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); 294c11d2c23SStefan Behrens int btrfs_get_dev_stats(struct btrfs_root *root, 295b27f7c0cSDavid Sterba struct btrfs_ioctl_get_dev_stats *stats); 296733f4fbbSStefan Behrens int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); 297733f4fbbSStefan Behrens int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, 298733f4fbbSStefan Behrens struct btrfs_fs_info *fs_info); 299442a4f63SStefan Behrens 300442a4f63SStefan Behrens static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, 301442a4f63SStefan Behrens int index) 302442a4f63SStefan Behrens { 303442a4f63SStefan Behrens atomic_inc(dev->dev_stat_values + index); 304442a4f63SStefan Behrens dev->dev_stats_dirty = 1; 305442a4f63SStefan Behrens } 306442a4f63SStefan Behrens 307442a4f63SStefan Behrens static inline int btrfs_dev_stat_read(struct btrfs_device *dev, 308442a4f63SStefan Behrens int index) 309442a4f63SStefan Behrens { 310442a4f63SStefan Behrens return atomic_read(dev->dev_stat_values + index); 311442a4f63SStefan Behrens } 312442a4f63SStefan Behrens 313442a4f63SStefan Behrens static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, 314442a4f63SStefan Behrens int index) 315442a4f63SStefan Behrens { 316442a4f63SStefan Behrens int ret; 317442a4f63SStefan Behrens 318442a4f63SStefan Behrens ret = atomic_xchg(dev->dev_stat_values + index, 0); 319442a4f63SStefan Behrens dev->dev_stats_dirty = 1; 320442a4f63SStefan Behrens return ret; 321442a4f63SStefan Behrens } 322442a4f63SStefan Behrens 323442a4f63SStefan Behrens static inline void btrfs_dev_stat_set(struct btrfs_device *dev, 324442a4f63SStefan Behrens int index, unsigned long val) 325442a4f63SStefan Behrens { 326442a4f63SStefan Behrens atomic_set(dev->dev_stat_values + index, val); 327442a4f63SStefan Behrens dev->dev_stats_dirty = 1; 328442a4f63SStefan Behrens } 329442a4f63SStefan Behrens 330442a4f63SStefan Behrens static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, 331442a4f63SStefan Behrens int index) 332442a4f63SStefan Behrens { 333442a4f63SStefan Behrens btrfs_dev_stat_set(dev, index, 0); 334442a4f63SStefan Behrens } 3350b86a832SChris Mason #endif 336