1c1d7c514SDavid Sterba // SPDX-License-Identifier: GPL-2.0 26cbd5570SChris Mason /* 36cbd5570SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 46cbd5570SChris Mason */ 56cbd5570SChris Mason 6e20d96d6SChris Mason #include <linux/fs.h> 7d98237b3SChris Mason #include <linux/blkdev.h> 80f7d52f4SChris Mason #include <linux/radix-tree.h> 935b7e476SChris Mason #include <linux/writeback.h> 10d397712bSChris Mason #include <linux/buffer_head.h> 11ce9adaa5SChris Mason #include <linux/workqueue.h> 12a74a4b97SChris Mason #include <linux/kthread.h> 135a0e3ad6STejun Heo #include <linux/slab.h> 14784b4e29SChris Mason #include <linux/migrate.h> 157a36ddecSDavid Sterba #include <linux/ratelimit.h> 166463fe58SStefan Behrens #include <linux/uuid.h> 17803b2f54SStefan Behrens #include <linux/semaphore.h> 18540adea3SMasami Hiramatsu #include <linux/error-injection.h> 199678c543SNikolay Borisov #include <linux/crc32c.h> 20b89f6d1fSFilipe Manana #include <linux/sched/mm.h> 217e75bf3fSDavid Sterba #include <asm/unaligned.h> 226d97c6e3SJohannes Thumshirn #include <crypto/hash.h> 23eb60ceacSChris Mason #include "ctree.h" 24eb60ceacSChris Mason #include "disk-io.h" 25e089f05cSChris Mason #include "transaction.h" 260f7d52f4SChris Mason #include "btrfs_inode.h" 270b86a832SChris Mason #include "volumes.h" 28db94535dSChris Mason #include "print-tree.h" 29925baeddSChris Mason #include "locking.h" 30e02119d5SChris Mason #include "tree-log.h" 31fa9c0d79SChris Mason #include "free-space-cache.h" 3270f6d82eSOmar Sandoval #include "free-space-tree.h" 33581bb050SLi Zefan #include "inode-map.h" 3421adbd5cSStefan Behrens #include "check-integrity.h" 35606686eeSJosef Bacik #include "rcu-string.h" 368dabb742SStefan Behrens #include "dev-replace.h" 3753b381b3SDavid Woodhouse #include "raid56.h" 385ac1d209SJeff Mahoney #include "sysfs.h" 39fcebe456SJosef Bacik #include "qgroup.h" 40ebb8765bSAnand Jain #include "compression.h" 41557ea5ddSQu Wenruo #include "tree-checker.h" 42fd708b81SJosef Bacik #include "ref-verify.h" 43aac0023cSJosef Bacik #include "block-group.h" 44b0643e59SDennis Zhou #include "discard.h" 45eb60ceacSChris Mason 46319e4d06SQu Wenruo #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ 47319e4d06SQu Wenruo BTRFS_HEADER_FLAG_RELOC |\ 48319e4d06SQu Wenruo BTRFS_SUPER_FLAG_ERROR |\ 49319e4d06SQu Wenruo BTRFS_SUPER_FLAG_SEEDING |\ 50e2731e55SAnand Jain BTRFS_SUPER_FLAG_METADUMP |\ 51e2731e55SAnand Jain BTRFS_SUPER_FLAG_METADUMP_V2) 52319e4d06SQu Wenruo 53e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops; 548b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 55143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 56acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 572ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info); 58143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 592ff7e61eSJeff Mahoney static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, 60acce952bSliubo struct extent_io_tree *dirty_pages, 61acce952bSliubo int mark); 622ff7e61eSJeff Mahoney static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, 63acce952bSliubo struct extent_io_tree *pinned_extents); 642ff7e61eSJeff Mahoney static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info); 652ff7e61eSJeff Mahoney static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info); 66ce9adaa5SChris Mason 67d352ac68SChris Mason /* 6897eb6b69SDavid Sterba * btrfs_end_io_wq structs are used to do processing in task context when an IO 6997eb6b69SDavid Sterba * is complete. This is used during reads to verify checksums, and it is used 70d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 71d352ac68SChris Mason */ 7297eb6b69SDavid Sterba struct btrfs_end_io_wq { 73ce9adaa5SChris Mason struct bio *bio; 74ce9adaa5SChris Mason bio_end_io_t *end_io; 75ce9adaa5SChris Mason void *private; 76ce9adaa5SChris Mason struct btrfs_fs_info *info; 774e4cbee9SChristoph Hellwig blk_status_t status; 78bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata; 798b712842SChris Mason struct btrfs_work work; 80ce9adaa5SChris Mason }; 810da5468fSChris Mason 8297eb6b69SDavid Sterba static struct kmem_cache *btrfs_end_io_wq_cache; 8397eb6b69SDavid Sterba 8497eb6b69SDavid Sterba int __init btrfs_end_io_wq_init(void) 8597eb6b69SDavid Sterba { 8697eb6b69SDavid Sterba btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", 8797eb6b69SDavid Sterba sizeof(struct btrfs_end_io_wq), 8897eb6b69SDavid Sterba 0, 89fba4b697SNikolay Borisov SLAB_MEM_SPREAD, 9097eb6b69SDavid Sterba NULL); 9197eb6b69SDavid Sterba if (!btrfs_end_io_wq_cache) 9297eb6b69SDavid Sterba return -ENOMEM; 9397eb6b69SDavid Sterba return 0; 9497eb6b69SDavid Sterba } 9597eb6b69SDavid Sterba 96e67c718bSDavid Sterba void __cold btrfs_end_io_wq_exit(void) 9797eb6b69SDavid Sterba { 9897eb6b69SDavid Sterba kmem_cache_destroy(btrfs_end_io_wq_cache); 9997eb6b69SDavid Sterba } 10097eb6b69SDavid Sterba 101d352ac68SChris Mason /* 102d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 103d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 104d352ac68SChris Mason * just before they are sent down the IO stack. 105d352ac68SChris Mason */ 10644b8bd7eSChris Mason struct async_submit_bio { 107c6100a4bSJosef Bacik void *private_data; 10844b8bd7eSChris Mason struct bio *bio; 109a758781dSDavid Sterba extent_submit_bio_start_t *submit_bio_start; 11044b8bd7eSChris Mason int mirror_num; 111eaf25d93SChris Mason /* 112eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 113eaf25d93SChris Mason * can't tell us where in the file the bio should go 114eaf25d93SChris Mason */ 115eaf25d93SChris Mason u64 bio_offset; 1168b712842SChris Mason struct btrfs_work work; 1174e4cbee9SChristoph Hellwig blk_status_t status; 11844b8bd7eSChris Mason }; 11944b8bd7eSChris Mason 12085d4e461SChris Mason /* 12185d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 12285d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 12385d4e461SChris Mason * the level the eb occupies in the tree. 1244008c04aSChris Mason * 12585d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 12685d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 12785d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 1284fd786e6SMisono Tomohiro * by btrfs_root->root_key.objectid. This ensures that all special purpose 1294fd786e6SMisono Tomohiro * roots have separate keysets. 1304008c04aSChris Mason * 13185d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 13285d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 13385d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1344008c04aSChris Mason * 13585d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 13685d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 13785d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 13885d4e461SChris Mason * 13985d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 14085d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 14185d4e461SChris Mason * needs update as well. 1424008c04aSChris Mason */ 1434008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1444008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1454008c04aSChris Mason # error 1464008c04aSChris Mason # endif 14785d4e461SChris Mason 14885d4e461SChris Mason static struct btrfs_lockdep_keyset { 14985d4e461SChris Mason u64 id; /* root objectid */ 15085d4e461SChris Mason const char *name_stem; /* lock name stem */ 15185d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 15285d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 15385d4e461SChris Mason } btrfs_lockdep_keysets[] = { 15485d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 15585d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 15685d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 15785d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 15885d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 15985d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 16060b62978SDavid Sterba { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, 16185d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 16285d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 16385d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 16413fd8da9SDavid Sterba { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, 1656b20e0adSDavid Sterba { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, 16685d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1674008c04aSChris Mason }; 16885d4e461SChris Mason 16985d4e461SChris Mason void __init btrfs_init_lockdep(void) 17085d4e461SChris Mason { 17185d4e461SChris Mason int i, j; 17285d4e461SChris Mason 17385d4e461SChris Mason /* initialize lockdep class names */ 17485d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 17585d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 17685d4e461SChris Mason 17785d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 17885d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 17985d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 18085d4e461SChris Mason } 18185d4e461SChris Mason } 18285d4e461SChris Mason 18385d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 18485d4e461SChris Mason int level) 18585d4e461SChris Mason { 18685d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 18785d4e461SChris Mason 18885d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 18985d4e461SChris Mason 19085d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 19185d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 19285d4e461SChris Mason if (ks->id == objectid) 19385d4e461SChris Mason break; 19485d4e461SChris Mason 19585d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 19685d4e461SChris Mason &ks->keys[level], ks->names[level]); 19785d4e461SChris Mason } 19885d4e461SChris Mason 1994008c04aSChris Mason #endif 2004008c04aSChris Mason 201d352ac68SChris Mason /* 202d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 203d352ac68SChris Mason * that covers the entire device 204d352ac68SChris Mason */ 2056af49dbdSDavid Sterba struct extent_map *btree_get_extent(struct btrfs_inode *inode, 20639b07b5dSOmar Sandoval struct page *page, size_t pg_offset, 20739b07b5dSOmar Sandoval u64 start, u64 len) 2085f39d397SChris Mason { 209fc4f21b1SNikolay Borisov struct extent_map_tree *em_tree = &inode->extent_tree; 2105f39d397SChris Mason struct extent_map *em; 2115f39d397SChris Mason int ret; 2125f39d397SChris Mason 213890871beSChris Mason read_lock(&em_tree->lock); 214d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 215a061fc8dSChris Mason if (em) { 216890871beSChris Mason read_unlock(&em_tree->lock); 2175f39d397SChris Mason goto out; 218a061fc8dSChris Mason } 219890871beSChris Mason read_unlock(&em_tree->lock); 2207b13b7b1SChris Mason 221172ddd60SDavid Sterba em = alloc_extent_map(); 2225f39d397SChris Mason if (!em) { 2235f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2245f39d397SChris Mason goto out; 2255f39d397SChris Mason } 2265f39d397SChris Mason em->start = 0; 2270afbaf8cSChris Mason em->len = (u64)-1; 228c8b97818SChris Mason em->block_len = (u64)-1; 2295f39d397SChris Mason em->block_start = 0; 230d1310b2eSChris Mason 231890871beSChris Mason write_lock(&em_tree->lock); 23209a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2335f39d397SChris Mason if (ret == -EEXIST) { 2345f39d397SChris Mason free_extent_map(em); 2357b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 236b4f359abSTsutomu Itoh if (!em) 2370433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2385f39d397SChris Mason } else if (ret) { 2397b13b7b1SChris Mason free_extent_map(em); 2400433f20dSTsutomu Itoh em = ERR_PTR(ret); 2415f39d397SChris Mason } 242890871beSChris Mason write_unlock(&em_tree->lock); 2437b13b7b1SChris Mason 2445f39d397SChris Mason out: 2455f39d397SChris Mason return em; 2465f39d397SChris Mason } 2475f39d397SChris Mason 248d352ac68SChris Mason /* 2492996e1f8SJohannes Thumshirn * Compute the csum of a btree block and store the result to provided buffer. 2502996e1f8SJohannes Thumshirn * 2512996e1f8SJohannes Thumshirn * Returns error if the extent buffer cannot be mapped. 252d352ac68SChris Mason */ 2532996e1f8SJohannes Thumshirn static int csum_tree_block(struct extent_buffer *buf, u8 *result) 25419c00ddcSChris Mason { 255d5178578SJohannes Thumshirn struct btrfs_fs_info *fs_info = buf->fs_info; 256d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 25719c00ddcSChris Mason unsigned long len; 25819c00ddcSChris Mason unsigned long cur_len; 25919c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26019c00ddcSChris Mason char *kaddr; 26119c00ddcSChris Mason unsigned long map_start; 26219c00ddcSChris Mason unsigned long map_len; 26319c00ddcSChris Mason int err; 264d5178578SJohannes Thumshirn 265d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 266d5178578SJohannes Thumshirn crypto_shash_init(shash); 26719c00ddcSChris Mason 26819c00ddcSChris Mason len = buf->len - offset; 269d5178578SJohannes Thumshirn 27019c00ddcSChris Mason while (len > 0) { 271d2e174d5SJohannes Thumshirn /* 272d2e174d5SJohannes Thumshirn * Note: we don't need to check for the err == 1 case here, as 273d2e174d5SJohannes Thumshirn * with the given combination of 'start = BTRFS_CSUM_SIZE (32)' 274d2e174d5SJohannes Thumshirn * and 'min_len = 32' and the currently implemented mapping 275d2e174d5SJohannes Thumshirn * algorithm we cannot cross a page boundary. 276d2e174d5SJohannes Thumshirn */ 27719c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 278a6591715SChris Mason &kaddr, &map_start, &map_len); 279c53839fcSJohannes Thumshirn if (WARN_ON(err)) 2808bd98f0eSAlex Lyakas return err; 28119c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 282d5178578SJohannes Thumshirn crypto_shash_update(shash, kaddr + offset - map_start, cur_len); 28319c00ddcSChris Mason len -= cur_len; 28419c00ddcSChris Mason offset += cur_len; 28519c00ddcSChris Mason } 28671a63551SDavid Sterba memset(result, 0, BTRFS_CSUM_SIZE); 287607d432dSJosef Bacik 288d5178578SJohannes Thumshirn crypto_shash_final(shash, result); 28919c00ddcSChris Mason 29019c00ddcSChris Mason return 0; 29119c00ddcSChris Mason } 29219c00ddcSChris Mason 293d352ac68SChris Mason /* 294d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 295d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 296d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 297d352ac68SChris Mason * in the wrong place. 298d352ac68SChris Mason */ 2991259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 300b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 301b9fab919SChris Mason int atomic) 3021259ab75SChris Mason { 3032ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3041259ab75SChris Mason int ret; 3052755a0deSDavid Sterba bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); 3061259ab75SChris Mason 3071259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3081259ab75SChris Mason return 0; 3091259ab75SChris Mason 310b9fab919SChris Mason if (atomic) 311b9fab919SChris Mason return -EAGAIN; 312b9fab919SChris Mason 313a26e8c9fSJosef Bacik if (need_lock) { 314a26e8c9fSJosef Bacik btrfs_tree_read_lock(eb); 315300aa896SDavid Sterba btrfs_set_lock_blocking_read(eb); 316a26e8c9fSJosef Bacik } 317a26e8c9fSJosef Bacik 3182ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 319ff13db41SDavid Sterba &cached_state); 3200b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3211259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3221259ab75SChris Mason ret = 0; 3231259ab75SChris Mason goto out; 3241259ab75SChris Mason } 32594647322SDavid Sterba btrfs_err_rl(eb->fs_info, 32694647322SDavid Sterba "parent transid verify failed on %llu wanted %llu found %llu", 32794647322SDavid Sterba eb->start, 32829549aecSWang Shilong parent_transid, btrfs_header_generation(eb)); 3291259ab75SChris Mason ret = 1; 330a26e8c9fSJosef Bacik 331a26e8c9fSJosef Bacik /* 332a26e8c9fSJosef Bacik * Things reading via commit roots that don't have normal protection, 333a26e8c9fSJosef Bacik * like send, can have a really old block in cache that may point at a 33401327610SNicholas D Steeves * block that has been freed and re-allocated. So don't clear uptodate 335a26e8c9fSJosef Bacik * if we find an eb that is under IO (dirty/writeback) because we could 336a26e8c9fSJosef Bacik * end up reading in the stale data and then writing it back out and 337a26e8c9fSJosef Bacik * making everybody very sad. 338a26e8c9fSJosef Bacik */ 339a26e8c9fSJosef Bacik if (!extent_buffer_under_io(eb)) 3400b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 34133958dc6SChris Mason out: 3422ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 343e43bbe5eSDavid Sterba &cached_state); 344472b909fSJosef Bacik if (need_lock) 345a26e8c9fSJosef Bacik btrfs_tree_read_unlock_blocking(eb); 3461259ab75SChris Mason return ret; 3471259ab75SChris Mason } 3481259ab75SChris Mason 349e7e16f48SJohannes Thumshirn static bool btrfs_supported_super_csum(u16 csum_type) 350e7e16f48SJohannes Thumshirn { 351e7e16f48SJohannes Thumshirn switch (csum_type) { 352e7e16f48SJohannes Thumshirn case BTRFS_CSUM_TYPE_CRC32: 3533951e7f0SJohannes Thumshirn case BTRFS_CSUM_TYPE_XXHASH: 3543831bf00SJohannes Thumshirn case BTRFS_CSUM_TYPE_SHA256: 355352ae07bSDavid Sterba case BTRFS_CSUM_TYPE_BLAKE2: 356e7e16f48SJohannes Thumshirn return true; 357e7e16f48SJohannes Thumshirn default: 358e7e16f48SJohannes Thumshirn return false; 359e7e16f48SJohannes Thumshirn } 360e7e16f48SJohannes Thumshirn } 361e7e16f48SJohannes Thumshirn 362d352ac68SChris Mason /* 3631104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 3641104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 3651104a885SDavid Sterba */ 366ab8d0fc4SJeff Mahoney static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, 367ab8d0fc4SJeff Mahoney char *raw_disk_sb) 3681104a885SDavid Sterba { 3691104a885SDavid Sterba struct btrfs_super_block *disk_sb = 3701104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 37151bce6c9SJohannes Thumshirn char result[BTRFS_CSUM_SIZE]; 372d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 373d5178578SJohannes Thumshirn 374d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 375d5178578SJohannes Thumshirn crypto_shash_init(shash); 3761104a885SDavid Sterba 3771104a885SDavid Sterba /* 3781104a885SDavid Sterba * The super_block structure does not span the whole 37951bce6c9SJohannes Thumshirn * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space is 38051bce6c9SJohannes Thumshirn * filled with zeros and is included in the checksum. 3811104a885SDavid Sterba */ 382d5178578SJohannes Thumshirn crypto_shash_update(shash, raw_disk_sb + BTRFS_CSUM_SIZE, 383d5178578SJohannes Thumshirn BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 384d5178578SJohannes Thumshirn crypto_shash_final(shash, result); 3851104a885SDavid Sterba 38651bce6c9SJohannes Thumshirn if (memcmp(disk_sb->csum, result, btrfs_super_csum_size(disk_sb))) 387e7e16f48SJohannes Thumshirn return 1; 3881104a885SDavid Sterba 389e7e16f48SJohannes Thumshirn return 0; 3901104a885SDavid Sterba } 3911104a885SDavid Sterba 392e064d5e9SDavid Sterba int btrfs_verify_level_key(struct extent_buffer *eb, int level, 393ff76a864SLiu Bo struct btrfs_key *first_key, u64 parent_transid) 394581c1760SQu Wenruo { 395e064d5e9SDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 396581c1760SQu Wenruo int found_level; 397581c1760SQu Wenruo struct btrfs_key found_key; 398581c1760SQu Wenruo int ret; 399581c1760SQu Wenruo 400581c1760SQu Wenruo found_level = btrfs_header_level(eb); 401581c1760SQu Wenruo if (found_level != level) { 40263489055SQu Wenruo WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG), 40363489055SQu Wenruo KERN_ERR "BTRFS: tree level check failed\n"); 404581c1760SQu Wenruo btrfs_err(fs_info, 405581c1760SQu Wenruo "tree level mismatch detected, bytenr=%llu level expected=%u has=%u", 406581c1760SQu Wenruo eb->start, level, found_level); 407581c1760SQu Wenruo return -EIO; 408581c1760SQu Wenruo } 409581c1760SQu Wenruo 410581c1760SQu Wenruo if (!first_key) 411581c1760SQu Wenruo return 0; 412581c1760SQu Wenruo 4135d41be6fSQu Wenruo /* 4145d41be6fSQu Wenruo * For live tree block (new tree blocks in current transaction), 4155d41be6fSQu Wenruo * we need proper lock context to avoid race, which is impossible here. 4165d41be6fSQu Wenruo * So we only checks tree blocks which is read from disk, whose 4175d41be6fSQu Wenruo * generation <= fs_info->last_trans_committed. 4185d41be6fSQu Wenruo */ 4195d41be6fSQu Wenruo if (btrfs_header_generation(eb) > fs_info->last_trans_committed) 4205d41be6fSQu Wenruo return 0; 42162fdaa52SQu Wenruo 42262fdaa52SQu Wenruo /* We have @first_key, so this @eb must have at least one item */ 42362fdaa52SQu Wenruo if (btrfs_header_nritems(eb) == 0) { 42462fdaa52SQu Wenruo btrfs_err(fs_info, 42562fdaa52SQu Wenruo "invalid tree nritems, bytenr=%llu nritems=0 expect >0", 42662fdaa52SQu Wenruo eb->start); 42762fdaa52SQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 42862fdaa52SQu Wenruo return -EUCLEAN; 42962fdaa52SQu Wenruo } 43062fdaa52SQu Wenruo 431581c1760SQu Wenruo if (found_level) 432581c1760SQu Wenruo btrfs_node_key_to_cpu(eb, &found_key, 0); 433581c1760SQu Wenruo else 434581c1760SQu Wenruo btrfs_item_key_to_cpu(eb, &found_key, 0); 435581c1760SQu Wenruo ret = btrfs_comp_cpu_keys(first_key, &found_key); 436581c1760SQu Wenruo 437581c1760SQu Wenruo if (ret) { 43863489055SQu Wenruo WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG), 43963489055SQu Wenruo KERN_ERR "BTRFS: tree first key check failed\n"); 440581c1760SQu Wenruo btrfs_err(fs_info, 441ff76a864SLiu Bo "tree first key mismatch detected, bytenr=%llu parent_transid=%llu key expected=(%llu,%u,%llu) has=(%llu,%u,%llu)", 442ff76a864SLiu Bo eb->start, parent_transid, first_key->objectid, 443ff76a864SLiu Bo first_key->type, first_key->offset, 444ff76a864SLiu Bo found_key.objectid, found_key.type, 445ff76a864SLiu Bo found_key.offset); 446581c1760SQu Wenruo } 447581c1760SQu Wenruo return ret; 448581c1760SQu Wenruo } 449581c1760SQu Wenruo 4501104a885SDavid Sterba /* 451d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 452d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 453581c1760SQu Wenruo * 454581c1760SQu Wenruo * @parent_transid: expected transid, skip check if 0 455581c1760SQu Wenruo * @level: expected level, mandatory check 456581c1760SQu Wenruo * @first_key: expected key of first slot, skip check if NULL 457d352ac68SChris Mason */ 4585ab12d1fSDavid Sterba static int btree_read_extent_buffer_pages(struct extent_buffer *eb, 459581c1760SQu Wenruo u64 parent_transid, int level, 460581c1760SQu Wenruo struct btrfs_key *first_key) 461f188591eSChris Mason { 4625ab12d1fSDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 463f188591eSChris Mason struct extent_io_tree *io_tree; 464ea466794SJosef Bacik int failed = 0; 465f188591eSChris Mason int ret; 466f188591eSChris Mason int num_copies = 0; 467f188591eSChris Mason int mirror_num = 0; 468ea466794SJosef Bacik int failed_mirror = 0; 469f188591eSChris Mason 4700b246afaSJeff Mahoney io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree; 471f188591eSChris Mason while (1) { 472f8397d69SNikolay Borisov clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 473c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(eb, WAIT_COMPLETE, mirror_num); 474256dd1bbSStefan Behrens if (!ret) { 475581c1760SQu Wenruo if (verify_parent_transid(io_tree, eb, 476b9fab919SChris Mason parent_transid, 0)) 477256dd1bbSStefan Behrens ret = -EIO; 478e064d5e9SDavid Sterba else if (btrfs_verify_level_key(eb, level, 479ff76a864SLiu Bo first_key, parent_transid)) 480581c1760SQu Wenruo ret = -EUCLEAN; 481581c1760SQu Wenruo else 482581c1760SQu Wenruo break; 483256dd1bbSStefan Behrens } 484d397712bSChris Mason 4850b246afaSJeff Mahoney num_copies = btrfs_num_copies(fs_info, 486f188591eSChris Mason eb->start, eb->len); 4874235298eSChris Mason if (num_copies == 1) 488ea466794SJosef Bacik break; 4894235298eSChris Mason 4905cf1ab56SJosef Bacik if (!failed_mirror) { 4915cf1ab56SJosef Bacik failed = 1; 4925cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4935cf1ab56SJosef Bacik } 4945cf1ab56SJosef Bacik 495f188591eSChris Mason mirror_num++; 496ea466794SJosef Bacik if (mirror_num == failed_mirror) 497ea466794SJosef Bacik mirror_num++; 498ea466794SJosef Bacik 4994235298eSChris Mason if (mirror_num > num_copies) 500ea466794SJosef Bacik break; 501f188591eSChris Mason } 502ea466794SJosef Bacik 503c0901581SStefan Behrens if (failed && !ret && failed_mirror) 50420a1fbf9SDavid Sterba btrfs_repair_eb_io_failure(eb, failed_mirror); 505ea466794SJosef Bacik 506ea466794SJosef Bacik return ret; 507f188591eSChris Mason } 50819c00ddcSChris Mason 509d352ac68SChris Mason /* 510d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 511d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 512d352ac68SChris Mason */ 513d397712bSChris Mason 51401d58472SDaniel Dressler static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) 51519c00ddcSChris Mason { 5164eee4fa4SMiao Xie u64 start = page_offset(page); 51719c00ddcSChris Mason u64 found_start; 5182996e1f8SJohannes Thumshirn u8 result[BTRFS_CSUM_SIZE]; 5192996e1f8SJohannes Thumshirn u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 52019c00ddcSChris Mason struct extent_buffer *eb; 5218d47a0d8SQu Wenruo int ret; 522f188591eSChris Mason 5234f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 5244f2de97aSJosef Bacik if (page != eb->pages[0]) 5254f2de97aSJosef Bacik return 0; 5260f805531SAlex Lyakas 52719c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 5280f805531SAlex Lyakas /* 5290f805531SAlex Lyakas * Please do not consolidate these warnings into a single if. 5300f805531SAlex Lyakas * It is useful to know what went wrong. 5310f805531SAlex Lyakas */ 5320f805531SAlex Lyakas if (WARN_ON(found_start != start)) 5330f805531SAlex Lyakas return -EUCLEAN; 5340f805531SAlex Lyakas if (WARN_ON(!PageUptodate(page))) 5350f805531SAlex Lyakas return -EUCLEAN; 5360f805531SAlex Lyakas 537de37aa51SNikolay Borisov ASSERT(memcmp_extent_buffer(eb, fs_info->fs_devices->metadata_uuid, 5380f805531SAlex Lyakas btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); 5390f805531SAlex Lyakas 5402996e1f8SJohannes Thumshirn if (csum_tree_block(eb, result)) 5412996e1f8SJohannes Thumshirn return -EINVAL; 5422996e1f8SJohannes Thumshirn 5438d47a0d8SQu Wenruo if (btrfs_header_level(eb)) 5448d47a0d8SQu Wenruo ret = btrfs_check_node(eb); 5458d47a0d8SQu Wenruo else 5468d47a0d8SQu Wenruo ret = btrfs_check_leaf_full(eb); 5478d47a0d8SQu Wenruo 5488d47a0d8SQu Wenruo if (ret < 0) { 549c06631b0SQu Wenruo btrfs_print_tree(eb, 0); 5508d47a0d8SQu Wenruo btrfs_err(fs_info, 5518d47a0d8SQu Wenruo "block=%llu write time tree block corruption detected", 5528d47a0d8SQu Wenruo eb->start); 553c06631b0SQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 5548d47a0d8SQu Wenruo return ret; 5558d47a0d8SQu Wenruo } 5562996e1f8SJohannes Thumshirn write_extent_buffer(eb, result, 0, csum_size); 5578d47a0d8SQu Wenruo 5582996e1f8SJohannes Thumshirn return 0; 55919c00ddcSChris Mason } 56019c00ddcSChris Mason 561b0c9b3b0SDavid Sterba static int check_tree_block_fsid(struct extent_buffer *eb) 5622b82032cSYan Zheng { 563b0c9b3b0SDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 56401d58472SDaniel Dressler struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; 56544880fdcSAnand Jain u8 fsid[BTRFS_FSID_SIZE]; 5662b82032cSYan Zheng int ret = 1; 5672b82032cSYan Zheng 5680a4e5586SRoss Kirk read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); 5692b82032cSYan Zheng while (fs_devices) { 5707239ff4bSNikolay Borisov u8 *metadata_uuid; 5717239ff4bSNikolay Borisov 5727239ff4bSNikolay Borisov /* 5737239ff4bSNikolay Borisov * Checking the incompat flag is only valid for the current 5747239ff4bSNikolay Borisov * fs. For seed devices it's forbidden to have their uuid 5757239ff4bSNikolay Borisov * changed so reading ->fsid in this case is fine 5767239ff4bSNikolay Borisov */ 5777239ff4bSNikolay Borisov if (fs_devices == fs_info->fs_devices && 5787239ff4bSNikolay Borisov btrfs_fs_incompat(fs_info, METADATA_UUID)) 5797239ff4bSNikolay Borisov metadata_uuid = fs_devices->metadata_uuid; 5807239ff4bSNikolay Borisov else 5817239ff4bSNikolay Borisov metadata_uuid = fs_devices->fsid; 5827239ff4bSNikolay Borisov 5837239ff4bSNikolay Borisov if (!memcmp(fsid, metadata_uuid, BTRFS_FSID_SIZE)) { 5842b82032cSYan Zheng ret = 0; 5852b82032cSYan Zheng break; 5862b82032cSYan Zheng } 5872b82032cSYan Zheng fs_devices = fs_devices->seed; 5882b82032cSYan Zheng } 5892b82032cSYan Zheng return ret; 5902b82032cSYan Zheng } 5912b82032cSYan Zheng 592facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 593facc8a22SMiao Xie u64 phy_offset, struct page *page, 594facc8a22SMiao Xie u64 start, u64 end, int mirror) 595ce9adaa5SChris Mason { 596ce9adaa5SChris Mason u64 found_start; 597ce9adaa5SChris Mason int found_level; 598ce9adaa5SChris Mason struct extent_buffer *eb; 599ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 60002873e43SZhao Lei struct btrfs_fs_info *fs_info = root->fs_info; 6012996e1f8SJohannes Thumshirn u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 602f188591eSChris Mason int ret = 0; 6032996e1f8SJohannes Thumshirn u8 result[BTRFS_CSUM_SIZE]; 604727011e0SChris Mason int reads_done; 605ce9adaa5SChris Mason 606ce9adaa5SChris Mason if (!page->private) 607ce9adaa5SChris Mason goto out; 608d397712bSChris Mason 6094f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 610d397712bSChris Mason 6110b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 6120b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 6130b32f4bbSJosef Bacik */ 61467439dadSDavid Sterba atomic_inc(&eb->refs); 6150b32f4bbSJosef Bacik 6160b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 617727011e0SChris Mason if (!reads_done) 618727011e0SChris Mason goto err; 619f188591eSChris Mason 6205cf1ab56SJosef Bacik eb->read_mirror = mirror; 621656f30dbSFilipe Manana if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { 622ea466794SJosef Bacik ret = -EIO; 623ea466794SJosef Bacik goto err; 624ea466794SJosef Bacik } 625ea466794SJosef Bacik 626ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 627727011e0SChris Mason if (found_start != eb->start) { 628893bf4b1SSu Yue btrfs_err_rl(fs_info, "bad tree block start, want %llu have %llu", 629893bf4b1SSu Yue eb->start, found_start); 630f188591eSChris Mason ret = -EIO; 631ce9adaa5SChris Mason goto err; 632ce9adaa5SChris Mason } 633b0c9b3b0SDavid Sterba if (check_tree_block_fsid(eb)) { 63402873e43SZhao Lei btrfs_err_rl(fs_info, "bad fsid on block %llu", 63594647322SDavid Sterba eb->start); 6361259ab75SChris Mason ret = -EIO; 6371259ab75SChris Mason goto err; 6381259ab75SChris Mason } 639ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6401c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 641893bf4b1SSu Yue btrfs_err(fs_info, "bad tree block level %d on %llu", 642893bf4b1SSu Yue (int)btrfs_header_level(eb), eb->start); 6431c24c3ceSJosef Bacik ret = -EIO; 6441c24c3ceSJosef Bacik goto err; 6451c24c3ceSJosef Bacik } 646ce9adaa5SChris Mason 64785d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 64885d4e461SChris Mason eb, found_level); 6494008c04aSChris Mason 6502996e1f8SJohannes Thumshirn ret = csum_tree_block(eb, result); 6518bd98f0eSAlex Lyakas if (ret) 652a826d6dcSJosef Bacik goto err; 653a826d6dcSJosef Bacik 6542996e1f8SJohannes Thumshirn if (memcmp_extent_buffer(eb, result, 0, csum_size)) { 6552996e1f8SJohannes Thumshirn u32 val; 6562996e1f8SJohannes Thumshirn u32 found = 0; 6572996e1f8SJohannes Thumshirn 6582996e1f8SJohannes Thumshirn memcpy(&found, result, csum_size); 6592996e1f8SJohannes Thumshirn 6602996e1f8SJohannes Thumshirn read_extent_buffer(eb, &val, 0, csum_size); 6612996e1f8SJohannes Thumshirn btrfs_warn_rl(fs_info, 6622996e1f8SJohannes Thumshirn "%s checksum verify failed on %llu wanted %x found %x level %d", 6632996e1f8SJohannes Thumshirn fs_info->sb->s_id, eb->start, 6642996e1f8SJohannes Thumshirn val, found, btrfs_header_level(eb)); 6652996e1f8SJohannes Thumshirn ret = -EUCLEAN; 6662996e1f8SJohannes Thumshirn goto err; 6672996e1f8SJohannes Thumshirn } 6682996e1f8SJohannes Thumshirn 669a826d6dcSJosef Bacik /* 670a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 671a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 672a826d6dcSJosef Bacik * return -EIO. 673a826d6dcSJosef Bacik */ 6741c4360eeSDavid Sterba if (found_level == 0 && btrfs_check_leaf_full(eb)) { 675a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 676a826d6dcSJosef Bacik ret = -EIO; 677a826d6dcSJosef Bacik } 678ce9adaa5SChris Mason 679813fd1dcSDavid Sterba if (found_level > 0 && btrfs_check_node(eb)) 680053ab70fSLiu Bo ret = -EIO; 681053ab70fSLiu Bo 6820b32f4bbSJosef Bacik if (!ret) 6830b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 68475391f0dSQu Wenruo else 68575391f0dSQu Wenruo btrfs_err(fs_info, 68675391f0dSQu Wenruo "block=%llu read time tree block corruption detected", 68775391f0dSQu Wenruo eb->start); 688ce9adaa5SChris Mason err: 68979fb65a1SJosef Bacik if (reads_done && 69079fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 691d48d71aaSDavid Sterba btree_readahead_hook(eb, ret); 6924bb31e92SArne Jansen 69353b381b3SDavid Woodhouse if (ret) { 69453b381b3SDavid Woodhouse /* 69553b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 69653b381b3SDavid Woodhouse * again, we have to make sure it has something 69753b381b3SDavid Woodhouse * to decrement 69853b381b3SDavid Woodhouse */ 69953b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 7000b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 70153b381b3SDavid Woodhouse } 7020b32f4bbSJosef Bacik free_extent_buffer(eb); 703ce9adaa5SChris Mason out: 704f188591eSChris Mason return ret; 705ce9adaa5SChris Mason } 706ce9adaa5SChris Mason 7074246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 708ce9adaa5SChris Mason { 70997eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 710ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 7119e0af237SLiu Bo struct btrfs_workqueue *wq; 712ce9adaa5SChris Mason 713ce9adaa5SChris Mason fs_info = end_io_wq->info; 7144e4cbee9SChristoph Hellwig end_io_wq->status = bio->bi_status; 715d20f7043SChris Mason 71637226b21SMike Christie if (bio_op(bio) == REQ_OP_WRITE) { 717a0cac0ecSOmar Sandoval if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 7189e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 719a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 7209e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 721a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7229e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 723a0cac0ecSOmar Sandoval else 7249e0af237SLiu Bo wq = fs_info->endio_write_workers; 7259e0af237SLiu Bo } else { 726a0cac0ecSOmar Sandoval if (unlikely(end_io_wq->metadata == BTRFS_WQ_ENDIO_DIO_REPAIR)) 7278b110e39SMiao Xie wq = fs_info->endio_repair_workers; 728a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7299e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 730a0cac0ecSOmar Sandoval else if (end_io_wq->metadata) 7319e0af237SLiu Bo wq = fs_info->endio_meta_workers; 732a0cac0ecSOmar Sandoval else 7339e0af237SLiu Bo wq = fs_info->endio_workers; 7349e0af237SLiu Bo } 7359e0af237SLiu Bo 736a0cac0ecSOmar Sandoval btrfs_init_work(&end_io_wq->work, end_workqueue_fn, NULL, NULL); 7379e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 738ce9adaa5SChris Mason } 739ce9adaa5SChris Mason 7404e4cbee9SChristoph Hellwig blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 741bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 7420b86a832SChris Mason { 74397eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 7448b110e39SMiao Xie 74597eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 746ce9adaa5SChris Mason if (!end_io_wq) 7474e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 748ce9adaa5SChris Mason 749ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 750ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 75122c59948SChris Mason end_io_wq->info = info; 7524e4cbee9SChristoph Hellwig end_io_wq->status = 0; 753ce9adaa5SChris Mason end_io_wq->bio = bio; 75422c59948SChris Mason end_io_wq->metadata = metadata; 755ce9adaa5SChris Mason 756ce9adaa5SChris Mason bio->bi_private = end_io_wq; 757ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 75822c59948SChris Mason return 0; 75922c59948SChris Mason } 76022c59948SChris Mason 7614a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7624a69a410SChris Mason { 7634a69a410SChris Mason struct async_submit_bio *async; 7644e4cbee9SChristoph Hellwig blk_status_t ret; 7654a69a410SChris Mason 7664a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 767c6100a4bSJosef Bacik ret = async->submit_bio_start(async->private_data, async->bio, 768eaf25d93SChris Mason async->bio_offset); 76979787eaaSJeff Mahoney if (ret) 7704e4cbee9SChristoph Hellwig async->status = ret; 7714a69a410SChris Mason } 7724a69a410SChris Mason 77306ea01b1SDavid Sterba /* 77406ea01b1SDavid Sterba * In order to insert checksums into the metadata in large chunks, we wait 77506ea01b1SDavid Sterba * until bio submission time. All the pages in the bio are checksummed and 77606ea01b1SDavid Sterba * sums are attached onto the ordered extent record. 77706ea01b1SDavid Sterba * 77806ea01b1SDavid Sterba * At IO completion time the csums attached on the ordered extent record are 77906ea01b1SDavid Sterba * inserted into the tree. 78006ea01b1SDavid Sterba */ 7814a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7828b712842SChris Mason { 7838b712842SChris Mason struct async_submit_bio *async; 78406ea01b1SDavid Sterba struct inode *inode; 78506ea01b1SDavid Sterba blk_status_t ret; 7868b712842SChris Mason 7878b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 78806ea01b1SDavid Sterba inode = async->private_data; 7894854ddd0SChris Mason 790bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 7914e4cbee9SChristoph Hellwig if (async->status) { 7924e4cbee9SChristoph Hellwig async->bio->bi_status = async->status; 7934246a0b6SChristoph Hellwig bio_endio(async->bio); 79479787eaaSJeff Mahoney return; 79579787eaaSJeff Mahoney } 79679787eaaSJeff Mahoney 797ec39f769SChris Mason /* 798ec39f769SChris Mason * All of the bios that pass through here are from async helpers. 799ec39f769SChris Mason * Use REQ_CGROUP_PUNT to issue them from the owning cgroup's context. 800ec39f769SChris Mason * This changes nothing when cgroups aren't in use. 801ec39f769SChris Mason */ 802ec39f769SChris Mason async->bio->bi_opf |= REQ_CGROUP_PUNT; 80308635baeSChris Mason ret = btrfs_map_bio(btrfs_sb(inode->i_sb), async->bio, async->mirror_num); 80406ea01b1SDavid Sterba if (ret) { 80506ea01b1SDavid Sterba async->bio->bi_status = ret; 80606ea01b1SDavid Sterba bio_endio(async->bio); 80706ea01b1SDavid Sterba } 8084a69a410SChris Mason } 8094a69a410SChris Mason 8104a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 8114a69a410SChris Mason { 8124a69a410SChris Mason struct async_submit_bio *async; 8134a69a410SChris Mason 8144a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 8158b712842SChris Mason kfree(async); 8168b712842SChris Mason } 8178b712842SChris Mason 8188c27cb35SLinus Torvalds blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 819c6100a4bSJosef Bacik int mirror_num, unsigned long bio_flags, 820c6100a4bSJosef Bacik u64 bio_offset, void *private_data, 821e288c080SDavid Sterba extent_submit_bio_start_t *submit_bio_start) 82244b8bd7eSChris Mason { 82344b8bd7eSChris Mason struct async_submit_bio *async; 82444b8bd7eSChris Mason 82544b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 82644b8bd7eSChris Mason if (!async) 8274e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 82844b8bd7eSChris Mason 829c6100a4bSJosef Bacik async->private_data = private_data; 83044b8bd7eSChris Mason async->bio = bio; 83144b8bd7eSChris Mason async->mirror_num = mirror_num; 8324a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8334a69a410SChris Mason 834a0cac0ecSOmar Sandoval btrfs_init_work(&async->work, run_one_async_start, run_one_async_done, 835a0cac0ecSOmar Sandoval run_one_async_free); 8364a69a410SChris Mason 837eaf25d93SChris Mason async->bio_offset = bio_offset; 8388c8bee1dSChris Mason 8394e4cbee9SChristoph Hellwig async->status = 0; 84079787eaaSJeff Mahoney 84167f055c7SChristoph Hellwig if (op_is_sync(bio->bi_opf)) 8425cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 843d313d7a3SChris Mason 8445cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 84544b8bd7eSChris Mason return 0; 84644b8bd7eSChris Mason } 84744b8bd7eSChris Mason 8484e4cbee9SChristoph Hellwig static blk_status_t btree_csum_one_bio(struct bio *bio) 849ce3ed71aSChris Mason { 8502c30c71bSKent Overstreet struct bio_vec *bvec; 851ce3ed71aSChris Mason struct btrfs_root *root; 8522b070cfeSChristoph Hellwig int ret = 0; 8536dc4f100SMing Lei struct bvec_iter_all iter_all; 854ce3ed71aSChris Mason 855c09abff8SDavid Sterba ASSERT(!bio_flagged(bio, BIO_CLONED)); 8562b070cfeSChristoph Hellwig bio_for_each_segment_all(bvec, bio, iter_all) { 857ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 85801d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 85979787eaaSJeff Mahoney if (ret) 86079787eaaSJeff Mahoney break; 861ce3ed71aSChris Mason } 8622c30c71bSKent Overstreet 8634e4cbee9SChristoph Hellwig return errno_to_blk_status(ret); 864ce3ed71aSChris Mason } 865ce3ed71aSChris Mason 866d0ee3934SDavid Sterba static blk_status_t btree_submit_bio_start(void *private_data, struct bio *bio, 867eaf25d93SChris Mason u64 bio_offset) 86822c59948SChris Mason { 8698b712842SChris Mason /* 8708b712842SChris Mason * when we're called for a write, we're already in the async 8715443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8728b712842SChris Mason */ 87379787eaaSJeff Mahoney return btree_csum_one_bio(bio); 87422c59948SChris Mason } 87522c59948SChris Mason 8769b4e675aSDavid Sterba static int check_async_write(struct btrfs_fs_info *fs_info, 8779b4e675aSDavid Sterba struct btrfs_inode *bi) 878de0022b9SJosef Bacik { 8796300463bSLiu Bo if (atomic_read(&bi->sync_writers)) 8806300463bSLiu Bo return 0; 8819b4e675aSDavid Sterba if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags)) 882de0022b9SJosef Bacik return 0; 883de0022b9SJosef Bacik return 1; 884de0022b9SJosef Bacik } 885de0022b9SJosef Bacik 886a56b1c7bSNikolay Borisov static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio, 88750489a57SNikolay Borisov int mirror_num, 88850489a57SNikolay Borisov unsigned long bio_flags) 88944b8bd7eSChris Mason { 8900b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); 8919b4e675aSDavid Sterba int async = check_async_write(fs_info, BTRFS_I(inode)); 8924e4cbee9SChristoph Hellwig blk_status_t ret; 893cad321adSChris Mason 89437226b21SMike Christie if (bio_op(bio) != REQ_OP_WRITE) { 895cad321adSChris Mason /* 896cad321adSChris Mason * called for a read, do the setup so that checksum validation 897cad321adSChris Mason * can happen in the async kernel threads 898cad321adSChris Mason */ 8990b246afaSJeff Mahoney ret = btrfs_bio_wq_end_io(fs_info, bio, 9000b246afaSJeff Mahoney BTRFS_WQ_ENDIO_METADATA); 9011d4284bdSChris Mason if (ret) 90261891923SStefan Behrens goto out_w_error; 90308635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 904de0022b9SJosef Bacik } else if (!async) { 905de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 906de0022b9SJosef Bacik if (ret) 90761891923SStefan Behrens goto out_w_error; 90808635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 90961891923SStefan Behrens } else { 910cad321adSChris Mason /* 91161891923SStefan Behrens * kthread helpers are used to submit writes so that 91261891923SStefan Behrens * checksumming can happen in parallel across all CPUs 913cad321adSChris Mason */ 914c6100a4bSJosef Bacik ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0, 915e68f2ee7SNikolay Borisov 0, inode, btree_submit_bio_start); 91644b8bd7eSChris Mason } 91744b8bd7eSChris Mason 9184246a0b6SChristoph Hellwig if (ret) 9194246a0b6SChristoph Hellwig goto out_w_error; 9204246a0b6SChristoph Hellwig return 0; 9214246a0b6SChristoph Hellwig 92261891923SStefan Behrens out_w_error: 9234e4cbee9SChristoph Hellwig bio->bi_status = ret; 9244246a0b6SChristoph Hellwig bio_endio(bio); 92561891923SStefan Behrens return ret; 92661891923SStefan Behrens } 92761891923SStefan Behrens 9283dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 929784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 930a6bc32b8SMel Gorman struct page *newpage, struct page *page, 931a6bc32b8SMel Gorman enum migrate_mode mode) 932784b4e29SChris Mason { 933784b4e29SChris Mason /* 934784b4e29SChris Mason * we can't safely write a btree page from here, 935784b4e29SChris Mason * we haven't done the locking hook 936784b4e29SChris Mason */ 937784b4e29SChris Mason if (PageDirty(page)) 938784b4e29SChris Mason return -EAGAIN; 939784b4e29SChris Mason /* 940784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 941784b4e29SChris Mason * We must have no buffers or drop them. 942784b4e29SChris Mason */ 943784b4e29SChris Mason if (page_has_private(page) && 944784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 945784b4e29SChris Mason return -EAGAIN; 946a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 947784b4e29SChris Mason } 9483dd1462eSJan Beulich #endif 949784b4e29SChris Mason 9500da5468fSChris Mason 9510da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9520da5468fSChris Mason struct writeback_control *wbc) 9530da5468fSChris Mason { 954e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 955e2d84521SMiao Xie int ret; 956e2d84521SMiao Xie 957d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 958448d640bSChris Mason 959448d640bSChris Mason if (wbc->for_kupdate) 960448d640bSChris Mason return 0; 961448d640bSChris Mason 962e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 963b9473439SChris Mason /* this is a bit racy, but that's ok */ 964d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 965d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 966d814a491SEthan Lien fs_info->dirty_metadata_batch); 967e2d84521SMiao Xie if (ret < 0) 968793955bcSChris Mason return 0; 969793955bcSChris Mason } 9700b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9710da5468fSChris Mason } 9720da5468fSChris Mason 973b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9745f39d397SChris Mason { 975d1310b2eSChris Mason struct extent_io_tree *tree; 976d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9778ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9785f39d397SChris Mason } 9795f39d397SChris Mason 98070dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9815f39d397SChris Mason { 98298509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 98398509cfcSChris Mason return 0; 9840c4e538bSDavid Sterba 985f7a52a40SDavid Sterba return try_release_extent_buffer(page); 986d98237b3SChris Mason } 987d98237b3SChris Mason 988d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 989d47992f8SLukas Czerner unsigned int length) 990d98237b3SChris Mason { 991d1310b2eSChris Mason struct extent_io_tree *tree; 992d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9935f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9945f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9959ad6b7bcSChris Mason if (PagePrivate(page)) { 996efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 997efe120a0SFrank Holton "page private not zero on page %llu", 998efe120a0SFrank Holton (unsigned long long)page_offset(page)); 9999ad6b7bcSChris Mason ClearPagePrivate(page); 10009ad6b7bcSChris Mason set_page_private(page, 0); 100109cbfeafSKirill A. Shutemov put_page(page); 10029ad6b7bcSChris Mason } 1003d98237b3SChris Mason } 1004d98237b3SChris Mason 10050b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10060b32f4bbSJosef Bacik { 1007bb146eb2SJosef Bacik #ifdef DEBUG 10080b32f4bbSJosef Bacik struct extent_buffer *eb; 10090b32f4bbSJosef Bacik 10100b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10110b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10120b32f4bbSJosef Bacik BUG_ON(!eb); 10130b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10140b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10150b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1016bb146eb2SJosef Bacik #endif 10170b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10180b32f4bbSJosef Bacik } 10190b32f4bbSJosef Bacik 10207f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1021d98237b3SChris Mason .readpage = btree_readpage, 10220da5468fSChris Mason .writepages = btree_writepages, 10235f39d397SChris Mason .releasepage = btree_releasepage, 10245f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10255a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1026784b4e29SChris Mason .migratepage = btree_migratepage, 10275a92bc88SChris Mason #endif 10280b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1029d98237b3SChris Mason }; 1030123abc88SChris Mason 10312ff7e61eSJeff Mahoney void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr) 1032090d1875SChris Mason { 10335f39d397SChris Mason struct extent_buffer *buf = NULL; 1034537f38f0SNikolay Borisov int ret; 1035090d1875SChris Mason 10362ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1037c871b0f2SLiu Bo if (IS_ERR(buf)) 10386197d86eSDavid Sterba return; 1039537f38f0SNikolay Borisov 1040c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(buf, WAIT_NONE, 0); 1041537f38f0SNikolay Borisov if (ret < 0) 1042537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 1043537f38f0SNikolay Borisov else 10445f39d397SChris Mason free_extent_buffer(buf); 1045090d1875SChris Mason } 1046090d1875SChris Mason 10472ff7e61eSJeff Mahoney struct extent_buffer *btrfs_find_create_tree_block( 10482ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info, 10490308af44SDavid Sterba u64 bytenr) 10500999df54SChris Mason { 10510b246afaSJeff Mahoney if (btrfs_is_testing(fs_info)) 10520b246afaSJeff Mahoney return alloc_test_extent_buffer(fs_info, bytenr); 10530b246afaSJeff Mahoney return alloc_extent_buffer(fs_info, bytenr); 10540999df54SChris Mason } 10550999df54SChris Mason 1056581c1760SQu Wenruo /* 1057581c1760SQu Wenruo * Read tree block at logical address @bytenr and do variant basic but critical 1058581c1760SQu Wenruo * verification. 1059581c1760SQu Wenruo * 1060581c1760SQu Wenruo * @parent_transid: expected transid of this tree block, skip check if 0 1061581c1760SQu Wenruo * @level: expected level, mandatory check 1062581c1760SQu Wenruo * @first_key: expected key in slot 0, skip check if NULL 1063581c1760SQu Wenruo */ 10642ff7e61eSJeff Mahoney struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, 1065581c1760SQu Wenruo u64 parent_transid, int level, 1066581c1760SQu Wenruo struct btrfs_key *first_key) 1067e20d96d6SChris Mason { 10685f39d397SChris Mason struct extent_buffer *buf = NULL; 106919c00ddcSChris Mason int ret; 107019c00ddcSChris Mason 10712ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1072c871b0f2SLiu Bo if (IS_ERR(buf)) 1073c871b0f2SLiu Bo return buf; 1074e4204dedSChris Mason 10755ab12d1fSDavid Sterba ret = btree_read_extent_buffer_pages(buf, parent_transid, 1076581c1760SQu Wenruo level, first_key); 10770f0fe8f7SFilipe David Borba Manana if (ret) { 1078537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 107964c043deSLiu Bo return ERR_PTR(ret); 10800f0fe8f7SFilipe David Borba Manana } 10815f39d397SChris Mason return buf; 1082ce9adaa5SChris Mason 1083eb60ceacSChris Mason } 1084eb60ceacSChris Mason 10856a884d7dSDavid Sterba void btrfs_clean_tree_block(struct extent_buffer *buf) 1086ed2ff2cbSChris Mason { 10876a884d7dSDavid Sterba struct btrfs_fs_info *fs_info = buf->fs_info; 108855c69072SChris Mason if (btrfs_header_generation(buf) == 1089e2d84521SMiao Xie fs_info->running_transaction->transid) { 1090b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1091b4ce94deSChris Mason 1092b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1093104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 1094e2d84521SMiao Xie -buf->len, 1095e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1096b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 10978bead258SDavid Sterba btrfs_set_lock_blocking_write(buf); 10980b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1099925baeddSChris Mason } 11005f39d397SChris Mason } 1101ed7b63ebSJosef Bacik } 11025f39d397SChris Mason 11038257b2dcSMiao Xie static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) 11048257b2dcSMiao Xie { 11058257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 11068257b2dcSMiao Xie int ret; 11078257b2dcSMiao Xie 11088257b2dcSMiao Xie writers = kmalloc(sizeof(*writers), GFP_NOFS); 11098257b2dcSMiao Xie if (!writers) 11108257b2dcSMiao Xie return ERR_PTR(-ENOMEM); 11118257b2dcSMiao Xie 11128a5a916dSJeff Mahoney ret = percpu_counter_init(&writers->counter, 0, GFP_NOFS); 11138257b2dcSMiao Xie if (ret < 0) { 11148257b2dcSMiao Xie kfree(writers); 11158257b2dcSMiao Xie return ERR_PTR(ret); 11168257b2dcSMiao Xie } 11178257b2dcSMiao Xie 11188257b2dcSMiao Xie init_waitqueue_head(&writers->wait); 11198257b2dcSMiao Xie return writers; 11208257b2dcSMiao Xie } 11218257b2dcSMiao Xie 11228257b2dcSMiao Xie static void 11238257b2dcSMiao Xie btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) 11248257b2dcSMiao Xie { 11258257b2dcSMiao Xie percpu_counter_destroy(&writers->counter); 11268257b2dcSMiao Xie kfree(writers); 11278257b2dcSMiao Xie } 11288257b2dcSMiao Xie 1129da17066cSJeff Mahoney static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1130e20d96d6SChris Mason u64 objectid) 1131d97e63b6SChris Mason { 11327c0260eeSJeff Mahoney bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 1133cfaa7295SChris Mason root->node = NULL; 1134a28ec197SChris Mason root->commit_root = NULL; 113527cdeb70SMiao Xie root->state = 0; 1136d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11370b86a832SChris Mason 11380f7d52f4SChris Mason root->last_trans = 0; 113913a8a7c8SYan, Zheng root->highest_objectid = 0; 1140eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1141199c2a9cSMiao Xie root->nr_ordered_extents = 0; 11426bef4d31SEric Paris root->inode_tree = RB_ROOT; 114316cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1144f0486c68SYan, Zheng root->block_rsv = NULL; 11450b86a832SChris Mason 11460b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11475d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1148eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1149eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1150199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1151199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 1152d2311e69SQu Wenruo INIT_LIST_HEAD(&root->reloc_dirty_list); 11532ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11542ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 11555d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1156eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1157199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1158f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 11592ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 11602ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 11618287475aSQu Wenruo spin_lock_init(&root->qgroup_meta_rsv_lock); 1162a2135011SChris Mason mutex_init(&root->objectid_mutex); 1163e02119d5SChris Mason mutex_init(&root->log_mutex); 116431f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1165573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 11667237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11677237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11687237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11698b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 11708b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 11717237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11727237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11737237f183SYan Zheng atomic_set(&root->log_writers, 0); 11742ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 11750700cea7SElena Reshetova refcount_set(&root->refs, 1); 1176ea14b57fSDavid Sterba atomic_set(&root->will_be_snapshotted, 0); 11778ecebf4dSRobbie Ko atomic_set(&root->snapshot_force_cow, 0); 1178eede2bf3SOmar Sandoval atomic_set(&root->nr_swapfiles, 0); 11797237f183SYan Zheng root->log_transid = 0; 1180d1433debSMiao Xie root->log_transid_committed = -1; 1181257c62e1SChris Mason root->last_log_commit = 0; 11827c0260eeSJeff Mahoney if (!dummy) 118343eb5f29SQu Wenruo extent_io_tree_init(fs_info, &root->dirty_log_pages, 118443eb5f29SQu Wenruo IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL); 1185017e5369SChris Mason 11863768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11873768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11886702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 11897c0260eeSJeff Mahoney if (!dummy) 11903f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 119106ea65a3SJosef Bacik else 119206ea65a3SJosef Bacik root->defrag_trans_start = 0; 11934d775673SChris Mason root->root_key.objectid = objectid; 11940ee5dc67SAl Viro root->anon_dev = 0; 11958ea05e3aSAlexander Block 11965f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 1197370a11b8SQu Wenruo btrfs_qgroup_init_swapped_blocks(&root->swapped_blocks); 11983768f368SChris Mason } 11993768f368SChris Mason 120074e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 120174e4d827SDavid Sterba gfp_t flags) 12026f07e42eSAl Viro { 120374e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 12046f07e42eSAl Viro if (root) 12056f07e42eSAl Viro root->fs_info = fs_info; 12066f07e42eSAl Viro return root; 12076f07e42eSAl Viro } 12086f07e42eSAl Viro 120906ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 121006ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 1211da17066cSJeff Mahoney struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info) 121206ea65a3SJosef Bacik { 121306ea65a3SJosef Bacik struct btrfs_root *root; 121406ea65a3SJosef Bacik 12157c0260eeSJeff Mahoney if (!fs_info) 12167c0260eeSJeff Mahoney return ERR_PTR(-EINVAL); 12177c0260eeSJeff Mahoney 12187c0260eeSJeff Mahoney root = btrfs_alloc_root(fs_info, GFP_KERNEL); 121906ea65a3SJosef Bacik if (!root) 122006ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1221da17066cSJeff Mahoney 1222b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 1223da17066cSJeff Mahoney __setup_root(root, fs_info, BTRFS_ROOT_TREE_OBJECTID); 1224faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 122506ea65a3SJosef Bacik 122606ea65a3SJosef Bacik return root; 122706ea65a3SJosef Bacik } 122806ea65a3SJosef Bacik #endif 122906ea65a3SJosef Bacik 123020897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 123120897f5cSArne Jansen u64 objectid) 123220897f5cSArne Jansen { 12339b7a2440SDavid Sterba struct btrfs_fs_info *fs_info = trans->fs_info; 123420897f5cSArne Jansen struct extent_buffer *leaf; 123520897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 123620897f5cSArne Jansen struct btrfs_root *root; 123720897f5cSArne Jansen struct btrfs_key key; 1238b89f6d1fSFilipe Manana unsigned int nofs_flag; 123920897f5cSArne Jansen int ret = 0; 124033d85fdaSQu Wenruo uuid_le uuid = NULL_UUID_LE; 124120897f5cSArne Jansen 1242b89f6d1fSFilipe Manana /* 1243b89f6d1fSFilipe Manana * We're holding a transaction handle, so use a NOFS memory allocation 1244b89f6d1fSFilipe Manana * context to avoid deadlock if reclaim happens. 1245b89f6d1fSFilipe Manana */ 1246b89f6d1fSFilipe Manana nofs_flag = memalloc_nofs_save(); 124774e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_KERNEL); 1248b89f6d1fSFilipe Manana memalloc_nofs_restore(nofs_flag); 124920897f5cSArne Jansen if (!root) 125020897f5cSArne Jansen return ERR_PTR(-ENOMEM); 125120897f5cSArne Jansen 1252da17066cSJeff Mahoney __setup_root(root, fs_info, objectid); 125320897f5cSArne Jansen root->root_key.objectid = objectid; 125420897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 125520897f5cSArne Jansen root->root_key.offset = 0; 125620897f5cSArne Jansen 12574d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 125820897f5cSArne Jansen if (IS_ERR(leaf)) { 125920897f5cSArne Jansen ret = PTR_ERR(leaf); 12601dd05682STsutomu Itoh leaf = NULL; 126120897f5cSArne Jansen goto fail; 126220897f5cSArne Jansen } 126320897f5cSArne Jansen 126420897f5cSArne Jansen root->node = leaf; 126520897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 126620897f5cSArne Jansen 126720897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 126827cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 126920897f5cSArne Jansen 127020897f5cSArne Jansen root->root_item.flags = 0; 127120897f5cSArne Jansen root->root_item.byte_limit = 0; 127220897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 127320897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 127420897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 127520897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 127620897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 127720897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 127820897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 127933d85fdaSQu Wenruo if (is_fstree(objectid)) 12806463fe58SStefan Behrens uuid_le_gen(&uuid); 12816463fe58SStefan Behrens memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); 128220897f5cSArne Jansen root->root_item.drop_level = 0; 128320897f5cSArne Jansen 128420897f5cSArne Jansen key.objectid = objectid; 128520897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 128620897f5cSArne Jansen key.offset = 0; 128720897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 128820897f5cSArne Jansen if (ret) 128920897f5cSArne Jansen goto fail; 129020897f5cSArne Jansen 129120897f5cSArne Jansen btrfs_tree_unlock(leaf); 129220897f5cSArne Jansen 129320897f5cSArne Jansen return root; 12941dd05682STsutomu Itoh 12951dd05682STsutomu Itoh fail: 12961dd05682STsutomu Itoh if (leaf) { 12971dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 129859885b39STsutomu Itoh free_extent_buffer(root->commit_root); 12991dd05682STsutomu Itoh free_extent_buffer(leaf); 13001dd05682STsutomu Itoh } 13011dd05682STsutomu Itoh kfree(root); 13021dd05682STsutomu Itoh 13031dd05682STsutomu Itoh return ERR_PTR(ret); 130420897f5cSArne Jansen } 130520897f5cSArne Jansen 13067237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1307e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13080f7d52f4SChris Mason { 13090f7d52f4SChris Mason struct btrfs_root *root; 13107237f183SYan Zheng struct extent_buffer *leaf; 1311e02119d5SChris Mason 131274e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1313e02119d5SChris Mason if (!root) 13147237f183SYan Zheng return ERR_PTR(-ENOMEM); 1315e02119d5SChris Mason 1316da17066cSJeff Mahoney __setup_root(root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1317e02119d5SChris Mason 1318e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1319e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1320e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 132127cdeb70SMiao Xie 13227237f183SYan Zheng /* 132327cdeb70SMiao Xie * DON'T set REF_COWS for log trees 132427cdeb70SMiao Xie * 13257237f183SYan Zheng * log trees do not get reference counted because they go away 13267237f183SYan Zheng * before a real commit is actually done. They do store pointers 13277237f183SYan Zheng * to file data extents, and those reference counts still get 13287237f183SYan Zheng * updated (along with back refs to the log tree). 13297237f183SYan Zheng */ 1330e02119d5SChris Mason 13314d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 13324d75f8a9SDavid Sterba NULL, 0, 0, 0); 13337237f183SYan Zheng if (IS_ERR(leaf)) { 13347237f183SYan Zheng kfree(root); 13357237f183SYan Zheng return ERR_CAST(leaf); 13367237f183SYan Zheng } 1337e02119d5SChris Mason 13387237f183SYan Zheng root->node = leaf; 1339e02119d5SChris Mason 1340e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1341e02119d5SChris Mason btrfs_tree_unlock(root->node); 13427237f183SYan Zheng return root; 13437237f183SYan Zheng } 13447237f183SYan Zheng 13457237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 13467237f183SYan Zheng struct btrfs_fs_info *fs_info) 13477237f183SYan Zheng { 13487237f183SYan Zheng struct btrfs_root *log_root; 13497237f183SYan Zheng 13507237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13517237f183SYan Zheng if (IS_ERR(log_root)) 13527237f183SYan Zheng return PTR_ERR(log_root); 13537237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 13547237f183SYan Zheng fs_info->log_root_tree = log_root; 13557237f183SYan Zheng return 0; 13567237f183SYan Zheng } 13577237f183SYan Zheng 13587237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13597237f183SYan Zheng struct btrfs_root *root) 13607237f183SYan Zheng { 13610b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 13627237f183SYan Zheng struct btrfs_root *log_root; 13637237f183SYan Zheng struct btrfs_inode_item *inode_item; 13647237f183SYan Zheng 13650b246afaSJeff Mahoney log_root = alloc_log_tree(trans, fs_info); 13667237f183SYan Zheng if (IS_ERR(log_root)) 13677237f183SYan Zheng return PTR_ERR(log_root); 13687237f183SYan Zheng 13697237f183SYan Zheng log_root->last_trans = trans->transid; 13707237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 13717237f183SYan Zheng 13727237f183SYan Zheng inode_item = &log_root->root_item.inode; 13733cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 13743cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 13753cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1376da17066cSJeff Mahoney btrfs_set_stack_inode_nbytes(inode_item, 13770b246afaSJeff Mahoney fs_info->nodesize); 13783cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 13797237f183SYan Zheng 13805d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13817237f183SYan Zheng 13827237f183SYan Zheng WARN_ON(root->log_root); 13837237f183SYan Zheng root->log_root = log_root; 13847237f183SYan Zheng root->log_transid = 0; 1385d1433debSMiao Xie root->log_transid_committed = -1; 1386257c62e1SChris Mason root->last_log_commit = 0; 1387e02119d5SChris Mason return 0; 1388e02119d5SChris Mason } 1389e02119d5SChris Mason 139035a3621bSStefan Behrens static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1391cb517eabSMiao Xie struct btrfs_key *key) 1392e02119d5SChris Mason { 1393e02119d5SChris Mason struct btrfs_root *root; 1394e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13950f7d52f4SChris Mason struct btrfs_path *path; 139684234f3aSYan Zheng u64 generation; 1397cb517eabSMiao Xie int ret; 1398581c1760SQu Wenruo int level; 1399cb517eabSMiao Xie 1400cb517eabSMiao Xie path = btrfs_alloc_path(); 1401cb517eabSMiao Xie if (!path) 1402cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 14030f7d52f4SChris Mason 140474e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1405cb517eabSMiao Xie if (!root) { 1406cb517eabSMiao Xie ret = -ENOMEM; 1407cb517eabSMiao Xie goto alloc_fail; 14080f7d52f4SChris Mason } 14090f7d52f4SChris Mason 1410da17066cSJeff Mahoney __setup_root(root, fs_info, key->objectid); 14110f7d52f4SChris Mason 1412cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1413cb517eabSMiao Xie &root->root_item, &root->root_key); 14140f7d52f4SChris Mason if (ret) { 141513a8a7c8SYan, Zheng if (ret > 0) 141613a8a7c8SYan, Zheng ret = -ENOENT; 1417cb517eabSMiao Xie goto find_fail; 14180f7d52f4SChris Mason } 141913a8a7c8SYan, Zheng 142084234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1421581c1760SQu Wenruo level = btrfs_root_level(&root->root_item); 14222ff7e61eSJeff Mahoney root->node = read_tree_block(fs_info, 14232ff7e61eSJeff Mahoney btrfs_root_bytenr(&root->root_item), 1424581c1760SQu Wenruo generation, level, NULL); 142564c043deSLiu Bo if (IS_ERR(root->node)) { 142664c043deSLiu Bo ret = PTR_ERR(root->node); 1427cb517eabSMiao Xie goto find_fail; 1428cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1429cb517eabSMiao Xie ret = -EIO; 143064c043deSLiu Bo free_extent_buffer(root->node); 143164c043deSLiu Bo goto find_fail; 1432416bc658SJosef Bacik } 14335d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 143413a8a7c8SYan, Zheng out: 1435cb517eabSMiao Xie btrfs_free_path(path); 1436cb517eabSMiao Xie return root; 1437cb517eabSMiao Xie 1438cb517eabSMiao Xie find_fail: 1439cb517eabSMiao Xie kfree(root); 1440cb517eabSMiao Xie alloc_fail: 1441cb517eabSMiao Xie root = ERR_PTR(ret); 1442cb517eabSMiao Xie goto out; 1443cb517eabSMiao Xie } 1444cb517eabSMiao Xie 1445cb517eabSMiao Xie struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, 1446cb517eabSMiao Xie struct btrfs_key *location) 1447cb517eabSMiao Xie { 1448cb517eabSMiao Xie struct btrfs_root *root; 1449cb517eabSMiao Xie 1450cb517eabSMiao Xie root = btrfs_read_tree_root(tree_root, location); 1451cb517eabSMiao Xie if (IS_ERR(root)) 1452cb517eabSMiao Xie return root; 1453cb517eabSMiao Xie 1454cb517eabSMiao Xie if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { 145527cdeb70SMiao Xie set_bit(BTRFS_ROOT_REF_COWS, &root->state); 145608fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 145708fe4db1SLi Zefan } 145813a8a7c8SYan, Zheng 14595eda7b5eSChris Mason return root; 14605eda7b5eSChris Mason } 14615eda7b5eSChris Mason 1462cb517eabSMiao Xie int btrfs_init_fs_root(struct btrfs_root *root) 1463cb517eabSMiao Xie { 1464cb517eabSMiao Xie int ret; 14658257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 1466cb517eabSMiao Xie 1467cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1468cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1469cb517eabSMiao Xie GFP_NOFS); 1470cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1471cb517eabSMiao Xie ret = -ENOMEM; 1472cb517eabSMiao Xie goto fail; 1473cb517eabSMiao Xie } 1474cb517eabSMiao Xie 14758257b2dcSMiao Xie writers = btrfs_alloc_subvolume_writers(); 14768257b2dcSMiao Xie if (IS_ERR(writers)) { 14778257b2dcSMiao Xie ret = PTR_ERR(writers); 14788257b2dcSMiao Xie goto fail; 14798257b2dcSMiao Xie } 14808257b2dcSMiao Xie root->subv_writers = writers; 14818257b2dcSMiao Xie 1482cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 148357cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 148457cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1485cb517eabSMiao Xie 1486cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1487cb517eabSMiao Xie if (ret) 1488876d2cf1SLiu Bo goto fail; 1489f32e48e9SChandan Rajendra 1490f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1491f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1492f32e48e9SChandan Rajendra &root->highest_objectid); 1493f32e48e9SChandan Rajendra if (ret) { 1494f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1495876d2cf1SLiu Bo goto fail; 1496f32e48e9SChandan Rajendra } 1497f32e48e9SChandan Rajendra 1498f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1499f32e48e9SChandan Rajendra 1500f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1501f32e48e9SChandan Rajendra 1502cb517eabSMiao Xie return 0; 1503cb517eabSMiao Xie fail: 150484db5ccfSDavid Sterba /* The caller is responsible to call btrfs_free_fs_root */ 1505cb517eabSMiao Xie return ret; 1506cb517eabSMiao Xie } 1507cb517eabSMiao Xie 150835bbb97fSJeff Mahoney struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1509cb517eabSMiao Xie u64 root_id) 1510cb517eabSMiao Xie { 1511cb517eabSMiao Xie struct btrfs_root *root; 1512cb517eabSMiao Xie 1513cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1514cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1515cb517eabSMiao Xie (unsigned long)root_id); 1516cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1517cb517eabSMiao Xie return root; 1518cb517eabSMiao Xie } 1519cb517eabSMiao Xie 1520cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1521cb517eabSMiao Xie struct btrfs_root *root) 1522cb517eabSMiao Xie { 1523cb517eabSMiao Xie int ret; 1524cb517eabSMiao Xie 1525e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1526cb517eabSMiao Xie if (ret) 1527cb517eabSMiao Xie return ret; 1528cb517eabSMiao Xie 1529cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1530cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1531cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1532cb517eabSMiao Xie root); 1533cb517eabSMiao Xie if (ret == 0) 153427cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1535cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1536cb517eabSMiao Xie radix_tree_preload_end(); 1537cb517eabSMiao Xie 1538cb517eabSMiao Xie return ret; 1539cb517eabSMiao Xie } 1540cb517eabSMiao Xie 1541c00869f1SMiao Xie struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 1542c00869f1SMiao Xie struct btrfs_key *location, 1543c00869f1SMiao Xie bool check_ref) 15445eda7b5eSChris Mason { 15455eda7b5eSChris Mason struct btrfs_root *root; 1546381cf658SDavid Sterba struct btrfs_path *path; 15471d4c08e0SDavid Sterba struct btrfs_key key; 15485eda7b5eSChris Mason int ret; 15495eda7b5eSChris Mason 1550edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1551edbd8d4eSChris Mason return fs_info->tree_root; 1552edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1553edbd8d4eSChris Mason return fs_info->extent_root; 15548f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 15558f18cf13SChris Mason return fs_info->chunk_root; 15568f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 15578f18cf13SChris Mason return fs_info->dev_root; 15580403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 15590403e47eSYan Zheng return fs_info->csum_root; 1560bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1561bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1562bcef60f2SArne Jansen ERR_PTR(-ENOENT); 1563f7a81ea4SStefan Behrens if (location->objectid == BTRFS_UUID_TREE_OBJECTID) 1564f7a81ea4SStefan Behrens return fs_info->uuid_root ? fs_info->uuid_root : 1565f7a81ea4SStefan Behrens ERR_PTR(-ENOENT); 156670f6d82eSOmar Sandoval if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 156770f6d82eSOmar Sandoval return fs_info->free_space_root ? fs_info->free_space_root : 156870f6d82eSOmar Sandoval ERR_PTR(-ENOENT); 15694df27c4dSYan, Zheng again: 1570cb517eabSMiao Xie root = btrfs_lookup_fs_root(fs_info, location->objectid); 157148475471SStefan Behrens if (root) { 1572c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) 157348475471SStefan Behrens return ERR_PTR(-ENOENT); 15745eda7b5eSChris Mason return root; 157548475471SStefan Behrens } 15765eda7b5eSChris Mason 1577cb517eabSMiao Xie root = btrfs_read_fs_root(fs_info->tree_root, location); 15785eda7b5eSChris Mason if (IS_ERR(root)) 15795eda7b5eSChris Mason return root; 15803394e160SChris Mason 1581c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1582d68fc57bSYan, Zheng ret = -ENOENT; 1583d68fc57bSYan, Zheng goto fail; 1584d68fc57bSYan, Zheng } 1585d68fc57bSYan, Zheng 1586cb517eabSMiao Xie ret = btrfs_init_fs_root(root); 1587cb517eabSMiao Xie if (ret) 1588cb517eabSMiao Xie goto fail; 1589cb517eabSMiao Xie 1590381cf658SDavid Sterba path = btrfs_alloc_path(); 1591381cf658SDavid Sterba if (!path) { 1592381cf658SDavid Sterba ret = -ENOMEM; 1593381cf658SDavid Sterba goto fail; 1594381cf658SDavid Sterba } 15951d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 15961d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 15971d4c08e0SDavid Sterba key.offset = location->objectid; 15981d4c08e0SDavid Sterba 15991d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1600381cf658SDavid Sterba btrfs_free_path(path); 1601d68fc57bSYan, Zheng if (ret < 0) 1602d68fc57bSYan, Zheng goto fail; 1603d68fc57bSYan, Zheng if (ret == 0) 160427cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1605d68fc57bSYan, Zheng 1606cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 16070f7d52f4SChris Mason if (ret) { 16084df27c4dSYan, Zheng if (ret == -EEXIST) { 160984db5ccfSDavid Sterba btrfs_free_fs_root(root); 16104df27c4dSYan, Zheng goto again; 16110f7d52f4SChris Mason } 16124df27c4dSYan, Zheng goto fail; 16134df27c4dSYan, Zheng } 1614edbd8d4eSChris Mason return root; 16154df27c4dSYan, Zheng fail: 161684db5ccfSDavid Sterba btrfs_free_fs_root(root); 16174df27c4dSYan, Zheng return ERR_PTR(ret); 1618edbd8d4eSChris Mason } 1619edbd8d4eSChris Mason 162004160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 162104160088SChris Mason { 162204160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 162304160088SChris Mason int ret = 0; 162404160088SChris Mason struct btrfs_device *device; 162504160088SChris Mason struct backing_dev_info *bdi; 1626b7967db7SChris Mason 16271f78160cSXiao Guangrong rcu_read_lock(); 16281f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1629dfe25020SChris Mason if (!device->bdev) 1630dfe25020SChris Mason continue; 1631efa7c9f9SJan Kara bdi = device->bdev->bd_bdi; 1632ff9ea323STejun Heo if (bdi_congested(bdi, bdi_bits)) { 163304160088SChris Mason ret = 1; 163404160088SChris Mason break; 163504160088SChris Mason } 163604160088SChris Mason } 16371f78160cSXiao Guangrong rcu_read_unlock(); 163804160088SChris Mason return ret; 163904160088SChris Mason } 164004160088SChris Mason 16418b712842SChris Mason /* 16428b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16438b712842SChris Mason * functions. This is where read checksum verification actually happens 16448b712842SChris Mason */ 16458b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1646ce9adaa5SChris Mason { 1647ce9adaa5SChris Mason struct bio *bio; 164897eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1649ce9adaa5SChris Mason 165097eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1651ce9adaa5SChris Mason bio = end_io_wq->bio; 16528b712842SChris Mason 16534e4cbee9SChristoph Hellwig bio->bi_status = end_io_wq->status; 1654ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1655ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 16564246a0b6SChristoph Hellwig bio_endio(bio); 16579be490f1SOmar Sandoval kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 1658ce9adaa5SChris Mason } 165944b8bd7eSChris Mason 1660a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1661a74a4b97SChris Mason { 1662a74a4b97SChris Mason struct btrfs_root *root = arg; 16630b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1664d0278245SMiao Xie int again; 1665a74a4b97SChris Mason 1666d6fd0ae2SOmar Sandoval while (1) { 1667d0278245SMiao Xie again = 0; 16689d1a2a3aSDavid Sterba 1669fd340d0fSJosef Bacik set_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1670fd340d0fSJosef Bacik 1671d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 16722ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) 1673d0278245SMiao Xie goto sleep; 1674d0278245SMiao Xie 167590c711abSZygo Blaxell /* 167690c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 167790c711abSZygo Blaxell * before we have finished mounting the filesystem. 167890c711abSZygo Blaxell */ 16790b246afaSJeff Mahoney if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags)) 168090c711abSZygo Blaxell goto sleep; 168190c711abSZygo Blaxell 16820b246afaSJeff Mahoney if (!mutex_trylock(&fs_info->cleaner_mutex)) 1683d0278245SMiao Xie goto sleep; 1684d0278245SMiao Xie 1685dc7f370cSMiao Xie /* 1686dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1687dc7f370cSMiao Xie * during the above check and trylock. 1688dc7f370cSMiao Xie */ 16892ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) { 16900b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1691dc7f370cSMiao Xie goto sleep; 1692dc7f370cSMiao Xie } 1693dc7f370cSMiao Xie 16942ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 1695c2d6cb16SFilipe Manana 16969d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 16970b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1698a74a4b97SChris Mason 1699d0278245SMiao Xie /* 170005323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 170105323cd1SMiao Xie * needn't do anything special here. 1702d0278245SMiao Xie */ 17030b246afaSJeff Mahoney btrfs_run_defrag_inodes(fs_info); 170467c5e7d4SFilipe Manana 170567c5e7d4SFilipe Manana /* 170667c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 170767c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 170867c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 170967c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 171067c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 171167c5e7d4SFilipe Manana * unused block groups. 171267c5e7d4SFilipe Manana */ 17130b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 1714d0278245SMiao Xie sleep: 1715fd340d0fSJosef Bacik clear_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1716d6fd0ae2SOmar Sandoval if (kthread_should_park()) 1717d6fd0ae2SOmar Sandoval kthread_parkme(); 1718d6fd0ae2SOmar Sandoval if (kthread_should_stop()) 1719d6fd0ae2SOmar Sandoval return 0; 1720838fe188SJiri Kosina if (!again) { 1721a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 1722a74a4b97SChris Mason schedule(); 1723a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1724a74a4b97SChris Mason } 1725da288d28SFilipe Manana } 1726a74a4b97SChris Mason } 1727a74a4b97SChris Mason 1728a74a4b97SChris Mason static int transaction_kthread(void *arg) 1729a74a4b97SChris Mason { 1730a74a4b97SChris Mason struct btrfs_root *root = arg; 17310b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1732a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1733a74a4b97SChris Mason struct btrfs_transaction *cur; 17348929ecfaSYan, Zheng u64 transid; 1735a944442cSAllen Pais time64_t now; 1736a74a4b97SChris Mason unsigned long delay; 1737914b2007SJan Kara bool cannot_commit; 1738a74a4b97SChris Mason 1739a74a4b97SChris Mason do { 1740914b2007SJan Kara cannot_commit = false; 17410b246afaSJeff Mahoney delay = HZ * fs_info->commit_interval; 17420b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 1743a74a4b97SChris Mason 17440b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 17450b246afaSJeff Mahoney cur = fs_info->running_transaction; 1746a74a4b97SChris Mason if (!cur) { 17470b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1748a74a4b97SChris Mason goto sleep; 1749a74a4b97SChris Mason } 175031153d81SYan Zheng 1751afd48513SArnd Bergmann now = ktime_get_seconds(); 17523296bf56SQu Wenruo if (cur->state < TRANS_STATE_COMMIT_START && 1753a514d638SQu Wenruo !test_bit(BTRFS_FS_NEED_ASYNC_COMMIT, &fs_info->flags) && 17548b87dc17SDavid Sterba (now < cur->start_time || 17550b246afaSJeff Mahoney now - cur->start_time < fs_info->commit_interval)) { 17560b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1757a74a4b97SChris Mason delay = HZ * 5; 1758a74a4b97SChris Mason goto sleep; 1759a74a4b97SChris Mason } 17608929ecfaSYan, Zheng transid = cur->transid; 17610b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 176256bec294SChris Mason 176379787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1764354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1765914b2007SJan Kara if (IS_ERR(trans)) { 1766354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1767914b2007SJan Kara cannot_commit = true; 176879787eaaSJeff Mahoney goto sleep; 1769914b2007SJan Kara } 17708929ecfaSYan, Zheng if (transid == trans->transid) { 17713a45bb20SJeff Mahoney btrfs_commit_transaction(trans); 17728929ecfaSYan, Zheng } else { 17733a45bb20SJeff Mahoney btrfs_end_transaction(trans); 17748929ecfaSYan, Zheng } 1775a74a4b97SChris Mason sleep: 17760b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 17770b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 1778a74a4b97SChris Mason 17794e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 17800b246afaSJeff Mahoney &fs_info->fs_state))) 17812ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 17828929ecfaSYan, Zheng if (!kthread_should_stop() && 17830b246afaSJeff Mahoney (!btrfs_transaction_blocked(fs_info) || 1784914b2007SJan Kara cannot_commit)) 1785bc5511d0SNikolay Borisov schedule_timeout_interruptible(delay); 1786a74a4b97SChris Mason } while (!kthread_should_stop()); 1787a74a4b97SChris Mason return 0; 1788a74a4b97SChris Mason } 1789a74a4b97SChris Mason 1790af31f5e5SChris Mason /* 179101f0f9daSNikolay Borisov * This will find the highest generation in the array of root backups. The 179201f0f9daSNikolay Borisov * index of the highest array is returned, or -EINVAL if we can't find 179301f0f9daSNikolay Borisov * anything. 1794af31f5e5SChris Mason * 1795af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1796af31f5e5SChris Mason * generation of the latest root in the array with the generation 1797af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1798af31f5e5SChris Mason */ 179901f0f9daSNikolay Borisov static int find_newest_super_backup(struct btrfs_fs_info *info) 1800af31f5e5SChris Mason { 180101f0f9daSNikolay Borisov const u64 newest_gen = btrfs_super_generation(info->super_copy); 1802af31f5e5SChris Mason u64 cur; 1803af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1804af31f5e5SChris Mason int i; 1805af31f5e5SChris Mason 1806af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1807af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1808af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1809af31f5e5SChris Mason if (cur == newest_gen) 181001f0f9daSNikolay Borisov return i; 1811af31f5e5SChris Mason } 1812af31f5e5SChris Mason 181301f0f9daSNikolay Borisov return -EINVAL; 1814af31f5e5SChris Mason } 1815af31f5e5SChris Mason 1816af31f5e5SChris Mason /* 1817af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1818af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1819af31f5e5SChris Mason * done 1820af31f5e5SChris Mason */ 1821af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1822af31f5e5SChris Mason { 18236ef108ddSNikolay Borisov const int next_backup = info->backup_root_index; 1824af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1825af31f5e5SChris Mason 1826af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1827af31f5e5SChris Mason 1828af31f5e5SChris Mason /* 1829af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1830af31f5e5SChris Mason * regardless of which ones we use today 1831af31f5e5SChris Mason */ 1832af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1833af31f5e5SChris Mason 1834af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1835af31f5e5SChris Mason 1836af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1837af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1838af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1839af31f5e5SChris Mason 1840af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1841af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1842af31f5e5SChris Mason 1843af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1844af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1845af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1846af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1847af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1848af31f5e5SChris Mason 1849af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1850af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1851af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1852af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1853af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1854af31f5e5SChris Mason 18557c7e82a7SChris Mason /* 18567c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18577c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18587c7e82a7SChris Mason */ 18597c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18607c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18617c7e82a7SChris Mason info->fs_root->node->start); 1862af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1863af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1864af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1865af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18667c7e82a7SChris Mason } 1867af31f5e5SChris Mason 1868af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1869af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1870af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1871af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1872af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1873af31f5e5SChris Mason 1874af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1875af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1876af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1877af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1878af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1879af31f5e5SChris Mason 1880af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1881af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1882af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1883af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1884af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1885af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1886af31f5e5SChris Mason 1887af31f5e5SChris Mason /* 1888af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1889af31f5e5SChris Mason * for the next commit 1890af31f5e5SChris Mason */ 1891af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1892af31f5e5SChris Mason &info->super_for_commit->super_roots, 1893af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1894af31f5e5SChris Mason } 1895af31f5e5SChris Mason 1896af31f5e5SChris Mason /* 1897bd2336b2SNikolay Borisov * read_backup_root - Reads a backup root based on the passed priority. Prio 0 1898bd2336b2SNikolay Borisov * is the newest, prio 1/2/3 are 2nd newest/3rd newest/4th (oldest) backup roots 1899bd2336b2SNikolay Borisov * 1900bd2336b2SNikolay Borisov * fs_info - filesystem whose backup roots need to be read 1901bd2336b2SNikolay Borisov * priority - priority of backup root required 1902bd2336b2SNikolay Borisov * 1903bd2336b2SNikolay Borisov * Returns backup root index on success and -EINVAL otherwise. 1904bd2336b2SNikolay Borisov */ 1905bd2336b2SNikolay Borisov static int read_backup_root(struct btrfs_fs_info *fs_info, u8 priority) 1906bd2336b2SNikolay Borisov { 1907bd2336b2SNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 1908bd2336b2SNikolay Borisov struct btrfs_super_block *super = fs_info->super_copy; 1909bd2336b2SNikolay Borisov struct btrfs_root_backup *root_backup; 1910bd2336b2SNikolay Borisov 1911bd2336b2SNikolay Borisov if (priority < BTRFS_NUM_BACKUP_ROOTS && backup_index >= 0) { 1912bd2336b2SNikolay Borisov if (priority == 0) 1913bd2336b2SNikolay Borisov return backup_index; 1914bd2336b2SNikolay Borisov 1915bd2336b2SNikolay Borisov backup_index = backup_index + BTRFS_NUM_BACKUP_ROOTS - priority; 1916bd2336b2SNikolay Borisov backup_index %= BTRFS_NUM_BACKUP_ROOTS; 1917bd2336b2SNikolay Borisov } else { 1918bd2336b2SNikolay Borisov return -EINVAL; 1919bd2336b2SNikolay Borisov } 1920bd2336b2SNikolay Borisov 1921bd2336b2SNikolay Borisov root_backup = super->super_roots + backup_index; 1922bd2336b2SNikolay Borisov 1923bd2336b2SNikolay Borisov btrfs_set_super_generation(super, 1924bd2336b2SNikolay Borisov btrfs_backup_tree_root_gen(root_backup)); 1925bd2336b2SNikolay Borisov btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1926bd2336b2SNikolay Borisov btrfs_set_super_root_level(super, 1927bd2336b2SNikolay Borisov btrfs_backup_tree_root_level(root_backup)); 1928bd2336b2SNikolay Borisov btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1929bd2336b2SNikolay Borisov 1930bd2336b2SNikolay Borisov /* 1931bd2336b2SNikolay Borisov * Fixme: the total bytes and num_devices need to match or we should 1932bd2336b2SNikolay Borisov * need a fsck 1933bd2336b2SNikolay Borisov */ 1934bd2336b2SNikolay Borisov btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1935bd2336b2SNikolay Borisov btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1936bd2336b2SNikolay Borisov 1937bd2336b2SNikolay Borisov return backup_index; 1938bd2336b2SNikolay Borisov } 1939bd2336b2SNikolay Borisov 19407abadb64SLiu Bo /* helper to cleanup workers */ 19417abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 19427abadb64SLiu Bo { 1943dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 1944afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 19455cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 1946fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 1947fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 19488b110e39SMiao Xie btrfs_destroy_workqueue(fs_info->endio_repair_workers); 1949d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 1950fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 1951fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 19525b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 1953e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 1954736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 1955a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 1956fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 1957b0643e59SDennis Zhou if (fs_info->discard_ctl.discard_workers) 1958b0643e59SDennis Zhou destroy_workqueue(fs_info->discard_ctl.discard_workers); 1959a9b9477dSFilipe Manana /* 1960a9b9477dSFilipe Manana * Now that all other work queues are destroyed, we can safely destroy 1961a9b9477dSFilipe Manana * the queues used for metadata I/O, since tasks from those other work 1962a9b9477dSFilipe Manana * queues can do metadata I/O operations. 1963a9b9477dSFilipe Manana */ 1964a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_workers); 1965a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 19667abadb64SLiu Bo } 19677abadb64SLiu Bo 19682e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 19692e9f5954SRashika { 19702e9f5954SRashika if (root) { 19712e9f5954SRashika free_extent_buffer(root->node); 19722e9f5954SRashika free_extent_buffer(root->commit_root); 19732e9f5954SRashika root->node = NULL; 19742e9f5954SRashika root->commit_root = NULL; 19752e9f5954SRashika } 19762e9f5954SRashika } 19772e9f5954SRashika 1978af31f5e5SChris Mason /* helper to cleanup tree roots */ 19794273eaffSAnand Jain static void free_root_pointers(struct btrfs_fs_info *info, bool free_chunk_root) 1980af31f5e5SChris Mason { 19812e9f5954SRashika free_root_extent_buffers(info->tree_root); 1982655b09feSJosef Bacik 19832e9f5954SRashika free_root_extent_buffers(info->dev_root); 19842e9f5954SRashika free_root_extent_buffers(info->extent_root); 19852e9f5954SRashika free_root_extent_buffers(info->csum_root); 19862e9f5954SRashika free_root_extent_buffers(info->quota_root); 19872e9f5954SRashika free_root_extent_buffers(info->uuid_root); 19884273eaffSAnand Jain if (free_chunk_root) 19892e9f5954SRashika free_root_extent_buffers(info->chunk_root); 199070f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 1991af31f5e5SChris Mason } 1992af31f5e5SChris Mason 1993faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 1994171f6537SJosef Bacik { 1995171f6537SJosef Bacik int ret; 1996171f6537SJosef Bacik struct btrfs_root *gang[8]; 1997171f6537SJosef Bacik int i; 1998171f6537SJosef Bacik 1999171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2000171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2001171f6537SJosef Bacik struct btrfs_root, root_list); 2002171f6537SJosef Bacik list_del(&gang[0]->root_list); 2003171f6537SJosef Bacik 200427cdeb70SMiao Xie if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { 2005cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 2006171f6537SJosef Bacik } else { 2007171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2008171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2009b0feb9d9SMiao Xie btrfs_put_fs_root(gang[0]); 2010171f6537SJosef Bacik } 2011171f6537SJosef Bacik } 2012171f6537SJosef Bacik 2013171f6537SJosef Bacik while (1) { 2014171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2015171f6537SJosef Bacik (void **)gang, 0, 2016171f6537SJosef Bacik ARRAY_SIZE(gang)); 2017171f6537SJosef Bacik if (!ret) 2018171f6537SJosef Bacik break; 2019171f6537SJosef Bacik for (i = 0; i < ret; i++) 2020cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2021171f6537SJosef Bacik } 20221a4319ccSLiu Bo 20231a4319ccSLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 20241a4319ccSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 20252ff7e61eSJeff Mahoney btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents); 20261a4319ccSLiu Bo } 2027171f6537SJosef Bacik } 2028af31f5e5SChris Mason 2029638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2030638aa7edSEric Sandeen { 2031638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2032638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2033638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2034638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2035638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2036638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2037ff09c4caSAnand Jain refcount_set(&fs_info->scrub_workers_refcnt, 0); 2038638aa7edSEric Sandeen } 2039638aa7edSEric Sandeen 2040779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2041779a65a4SEric Sandeen { 2042779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2043779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2044779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2045779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2046779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2047779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2048779a65a4SEric Sandeen } 2049779a65a4SEric Sandeen 20506bccf3abSJeff Mahoney static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info) 2051f37938e0SEric Sandeen { 20522ff7e61eSJeff Mahoney struct inode *inode = fs_info->btree_inode; 20532ff7e61eSJeff Mahoney 20542ff7e61eSJeff Mahoney inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 20552ff7e61eSJeff Mahoney set_nlink(inode, 1); 2056f37938e0SEric Sandeen /* 2057f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2058f37938e0SEric Sandeen * the real end of the address space is determined by all of 2059f37938e0SEric Sandeen * the devices in the system 2060f37938e0SEric Sandeen */ 20612ff7e61eSJeff Mahoney inode->i_size = OFFSET_MAX; 20622ff7e61eSJeff Mahoney inode->i_mapping->a_ops = &btree_aops; 2063f37938e0SEric Sandeen 20642ff7e61eSJeff Mahoney RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node); 206543eb5f29SQu Wenruo extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree, 206643eb5f29SQu Wenruo IO_TREE_INODE_IO, inode); 20677b439738SDavid Sterba BTRFS_I(inode)->io_tree.track_uptodate = false; 20682ff7e61eSJeff Mahoney extent_map_tree_init(&BTRFS_I(inode)->extent_tree); 2069f37938e0SEric Sandeen 20702ff7e61eSJeff Mahoney BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops; 2071f37938e0SEric Sandeen 20722ff7e61eSJeff Mahoney BTRFS_I(inode)->root = fs_info->tree_root; 20732ff7e61eSJeff Mahoney memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key)); 20742ff7e61eSJeff Mahoney set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags); 20752ff7e61eSJeff Mahoney btrfs_insert_inode_hash(inode); 2076f37938e0SEric Sandeen } 2077f37938e0SEric Sandeen 2078ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2079ad618368SEric Sandeen { 2080ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2081129827e3SDavid Sterba init_rwsem(&fs_info->dev_replace.rwsem); 20827f8d236aSDavid Sterba init_waitqueue_head(&fs_info->dev_replace.replace_wait); 2083ad618368SEric Sandeen } 2084ad618368SEric Sandeen 2085f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2086f9e92e40SEric Sandeen { 2087f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2088f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2089f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2090f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2091f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2092f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2093d2c609b8SJeff Mahoney fs_info->qgroup_rescan_running = false; 2094f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2095f9e92e40SEric Sandeen } 2096f9e92e40SEric Sandeen 20972a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 20982a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 20992a458198SEric Sandeen { 2100f7b885beSAnand Jain u32 max_active = fs_info->thread_pool_size; 21016f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 21022a458198SEric Sandeen 21032a458198SEric Sandeen fs_info->workers = 2104cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2105cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 21062a458198SEric Sandeen 21072a458198SEric Sandeen fs_info->delalloc_workers = 2108cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2109cb001095SJeff Mahoney flags, max_active, 2); 21102a458198SEric Sandeen 21112a458198SEric Sandeen fs_info->flush_workers = 2112cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2113cb001095SJeff Mahoney flags, max_active, 0); 21142a458198SEric Sandeen 21152a458198SEric Sandeen fs_info->caching_workers = 2116cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 21172a458198SEric Sandeen 21182a458198SEric Sandeen fs_info->fixup_workers = 2119cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 21202a458198SEric Sandeen 21212a458198SEric Sandeen /* 21222a458198SEric Sandeen * endios are largely parallel and should have a very 21232a458198SEric Sandeen * low idle thresh 21242a458198SEric Sandeen */ 21252a458198SEric Sandeen fs_info->endio_workers = 2126cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 21272a458198SEric Sandeen fs_info->endio_meta_workers = 2128cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2129cb001095SJeff Mahoney max_active, 4); 21302a458198SEric Sandeen fs_info->endio_meta_write_workers = 2131cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2132cb001095SJeff Mahoney max_active, 2); 21332a458198SEric Sandeen fs_info->endio_raid56_workers = 2134cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2135cb001095SJeff Mahoney max_active, 4); 21362a458198SEric Sandeen fs_info->endio_repair_workers = 2137cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); 21382a458198SEric Sandeen fs_info->rmw_workers = 2139cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 21402a458198SEric Sandeen fs_info->endio_write_workers = 2141cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2142cb001095SJeff Mahoney max_active, 2); 21432a458198SEric Sandeen fs_info->endio_freespace_worker = 2144cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2145cb001095SJeff Mahoney max_active, 0); 21462a458198SEric Sandeen fs_info->delayed_workers = 2147cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2148cb001095SJeff Mahoney max_active, 0); 21492a458198SEric Sandeen fs_info->readahead_workers = 2150cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2151cb001095SJeff Mahoney max_active, 2); 21522a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2153cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 2154b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers = 2155b0643e59SDennis Zhou alloc_workqueue("btrfs_discard", WQ_UNBOUND | WQ_FREEZABLE, 1); 21562a458198SEric Sandeen 21572a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 2158ba8a9d07SChris Mason fs_info->flush_workers && 21592a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 21602a458198SEric Sandeen fs_info->endio_meta_write_workers && 21612a458198SEric Sandeen fs_info->endio_repair_workers && 21622a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 21632a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 21642a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 21652a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 2166b0643e59SDennis Zhou fs_info->qgroup_rescan_workers && 2167b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers)) { 21682a458198SEric Sandeen return -ENOMEM; 21692a458198SEric Sandeen } 21702a458198SEric Sandeen 21712a458198SEric Sandeen return 0; 21722a458198SEric Sandeen } 21732a458198SEric Sandeen 21746d97c6e3SJohannes Thumshirn static int btrfs_init_csum_hash(struct btrfs_fs_info *fs_info, u16 csum_type) 21756d97c6e3SJohannes Thumshirn { 21766d97c6e3SJohannes Thumshirn struct crypto_shash *csum_shash; 2177b4e967beSDavid Sterba const char *csum_driver = btrfs_super_csum_driver(csum_type); 21786d97c6e3SJohannes Thumshirn 2179b4e967beSDavid Sterba csum_shash = crypto_alloc_shash(csum_driver, 0, 0); 21806d97c6e3SJohannes Thumshirn 21816d97c6e3SJohannes Thumshirn if (IS_ERR(csum_shash)) { 21826d97c6e3SJohannes Thumshirn btrfs_err(fs_info, "error allocating %s hash for checksum", 2183b4e967beSDavid Sterba csum_driver); 21846d97c6e3SJohannes Thumshirn return PTR_ERR(csum_shash); 21856d97c6e3SJohannes Thumshirn } 21866d97c6e3SJohannes Thumshirn 21876d97c6e3SJohannes Thumshirn fs_info->csum_shash = csum_shash; 21886d97c6e3SJohannes Thumshirn 21896d97c6e3SJohannes Thumshirn return 0; 21906d97c6e3SJohannes Thumshirn } 21916d97c6e3SJohannes Thumshirn 21926d97c6e3SJohannes Thumshirn static void btrfs_free_csum_hash(struct btrfs_fs_info *fs_info) 21936d97c6e3SJohannes Thumshirn { 21946d97c6e3SJohannes Thumshirn crypto_free_shash(fs_info->csum_shash); 21956d97c6e3SJohannes Thumshirn } 21966d97c6e3SJohannes Thumshirn 219763443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 219863443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 219963443bf5SEric Sandeen { 220063443bf5SEric Sandeen int ret; 220163443bf5SEric Sandeen struct btrfs_root *log_tree_root; 220263443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 220363443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 2204581c1760SQu Wenruo int level = btrfs_super_log_root_level(disk_super); 220563443bf5SEric Sandeen 220663443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2207f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 220863443bf5SEric Sandeen return -EIO; 220963443bf5SEric Sandeen } 221063443bf5SEric Sandeen 221174e4d827SDavid Sterba log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 221263443bf5SEric Sandeen if (!log_tree_root) 221363443bf5SEric Sandeen return -ENOMEM; 221463443bf5SEric Sandeen 2215da17066cSJeff Mahoney __setup_root(log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 221663443bf5SEric Sandeen 22172ff7e61eSJeff Mahoney log_tree_root->node = read_tree_block(fs_info, bytenr, 2218581c1760SQu Wenruo fs_info->generation + 1, 2219581c1760SQu Wenruo level, NULL); 222064c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2221f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 22220eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 222364c043deSLiu Bo kfree(log_tree_root); 22240eeff236SLiu Bo return ret; 222564c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2226f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 222763443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 222863443bf5SEric Sandeen kfree(log_tree_root); 222963443bf5SEric Sandeen return -EIO; 223063443bf5SEric Sandeen } 223163443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 223263443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 223363443bf5SEric Sandeen if (ret) { 22340b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 223563443bf5SEric Sandeen "Failed to recover log tree"); 223663443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 223763443bf5SEric Sandeen kfree(log_tree_root); 223863443bf5SEric Sandeen return ret; 223963443bf5SEric Sandeen } 224063443bf5SEric Sandeen 2241bc98a42cSDavid Howells if (sb_rdonly(fs_info->sb)) { 22426bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 224363443bf5SEric Sandeen if (ret) 224463443bf5SEric Sandeen return ret; 224563443bf5SEric Sandeen } 224663443bf5SEric Sandeen 224763443bf5SEric Sandeen return 0; 224863443bf5SEric Sandeen } 224963443bf5SEric Sandeen 22506bccf3abSJeff Mahoney static int btrfs_read_roots(struct btrfs_fs_info *fs_info) 22514bbcaa64SEric Sandeen { 22526bccf3abSJeff Mahoney struct btrfs_root *tree_root = fs_info->tree_root; 2253a4f3d2c4SDavid Sterba struct btrfs_root *root; 22544bbcaa64SEric Sandeen struct btrfs_key location; 22554bbcaa64SEric Sandeen int ret; 22564bbcaa64SEric Sandeen 22576bccf3abSJeff Mahoney BUG_ON(!fs_info->tree_root); 22586bccf3abSJeff Mahoney 22594bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 22604bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 22614bbcaa64SEric Sandeen location.offset = 0; 22624bbcaa64SEric Sandeen 2263a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2264f50f4353SLiu Bo if (IS_ERR(root)) { 2265f50f4353SLiu Bo ret = PTR_ERR(root); 2266f50f4353SLiu Bo goto out; 2267f50f4353SLiu Bo } 2268a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2269a4f3d2c4SDavid Sterba fs_info->extent_root = root; 22704bbcaa64SEric Sandeen 22714bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2272a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2273f50f4353SLiu Bo if (IS_ERR(root)) { 2274f50f4353SLiu Bo ret = PTR_ERR(root); 2275f50f4353SLiu Bo goto out; 2276f50f4353SLiu Bo } 2277a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2278a4f3d2c4SDavid Sterba fs_info->dev_root = root; 22794bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 22804bbcaa64SEric Sandeen 22814bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2282a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2283f50f4353SLiu Bo if (IS_ERR(root)) { 2284f50f4353SLiu Bo ret = PTR_ERR(root); 2285f50f4353SLiu Bo goto out; 2286f50f4353SLiu Bo } 2287a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2288a4f3d2c4SDavid Sterba fs_info->csum_root = root; 22894bbcaa64SEric Sandeen 22904bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2291a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2292a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2293a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2294afcdd129SJosef Bacik set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); 2295a4f3d2c4SDavid Sterba fs_info->quota_root = root; 22964bbcaa64SEric Sandeen } 22974bbcaa64SEric Sandeen 22984bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2299a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2300a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2301a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 23024bbcaa64SEric Sandeen if (ret != -ENOENT) 2303f50f4353SLiu Bo goto out; 23044bbcaa64SEric Sandeen } else { 2305a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2306a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 23074bbcaa64SEric Sandeen } 23084bbcaa64SEric Sandeen 230970f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 231070f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 231170f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 2312f50f4353SLiu Bo if (IS_ERR(root)) { 2313f50f4353SLiu Bo ret = PTR_ERR(root); 2314f50f4353SLiu Bo goto out; 2315f50f4353SLiu Bo } 231670f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 231770f6d82eSOmar Sandoval fs_info->free_space_root = root; 231870f6d82eSOmar Sandoval } 231970f6d82eSOmar Sandoval 23204bbcaa64SEric Sandeen return 0; 2321f50f4353SLiu Bo out: 2322f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read root (objectid=%llu): %d", 2323f50f4353SLiu Bo location.objectid, ret); 2324f50f4353SLiu Bo return ret; 23254bbcaa64SEric Sandeen } 23264bbcaa64SEric Sandeen 2327069ec957SQu Wenruo /* 2328069ec957SQu Wenruo * Real super block validation 2329069ec957SQu Wenruo * NOTE: super csum type and incompat features will not be checked here. 2330069ec957SQu Wenruo * 2331069ec957SQu Wenruo * @sb: super block to check 2332069ec957SQu Wenruo * @mirror_num: the super block number to check its bytenr: 2333069ec957SQu Wenruo * 0 the primary (1st) sb 2334069ec957SQu Wenruo * 1, 2 2nd and 3rd backup copy 2335069ec957SQu Wenruo * -1 skip bytenr check 2336069ec957SQu Wenruo */ 2337069ec957SQu Wenruo static int validate_super(struct btrfs_fs_info *fs_info, 2338069ec957SQu Wenruo struct btrfs_super_block *sb, int mirror_num) 233921a852b0SQu Wenruo { 234021a852b0SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 234121a852b0SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 234221a852b0SQu Wenruo int ret = 0; 234321a852b0SQu Wenruo 234421a852b0SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 234521a852b0SQu Wenruo btrfs_err(fs_info, "no valid FS found"); 234621a852b0SQu Wenruo ret = -EINVAL; 234721a852b0SQu Wenruo } 234821a852b0SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) { 234921a852b0SQu Wenruo btrfs_err(fs_info, "unrecognized or unsupported super flag: %llu", 235021a852b0SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 235121a852b0SQu Wenruo ret = -EINVAL; 235221a852b0SQu Wenruo } 235321a852b0SQu Wenruo if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 235421a852b0SQu Wenruo btrfs_err(fs_info, "tree_root level too big: %d >= %d", 235521a852b0SQu Wenruo btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 235621a852b0SQu Wenruo ret = -EINVAL; 235721a852b0SQu Wenruo } 235821a852b0SQu Wenruo if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 235921a852b0SQu Wenruo btrfs_err(fs_info, "chunk_root level too big: %d >= %d", 236021a852b0SQu Wenruo btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 236121a852b0SQu Wenruo ret = -EINVAL; 236221a852b0SQu Wenruo } 236321a852b0SQu Wenruo if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 236421a852b0SQu Wenruo btrfs_err(fs_info, "log_root level too big: %d >= %d", 236521a852b0SQu Wenruo btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 236621a852b0SQu Wenruo ret = -EINVAL; 236721a852b0SQu Wenruo } 236821a852b0SQu Wenruo 236921a852b0SQu Wenruo /* 237021a852b0SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 237121a852b0SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 237221a852b0SQu Wenruo */ 237321a852b0SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 237421a852b0SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 237521a852b0SQu Wenruo btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); 237621a852b0SQu Wenruo ret = -EINVAL; 237721a852b0SQu Wenruo } 237821a852b0SQu Wenruo /* Only PAGE SIZE is supported yet */ 237921a852b0SQu Wenruo if (sectorsize != PAGE_SIZE) { 238021a852b0SQu Wenruo btrfs_err(fs_info, 238121a852b0SQu Wenruo "sectorsize %llu not supported yet, only support %lu", 238221a852b0SQu Wenruo sectorsize, PAGE_SIZE); 238321a852b0SQu Wenruo ret = -EINVAL; 238421a852b0SQu Wenruo } 238521a852b0SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 238621a852b0SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 238721a852b0SQu Wenruo btrfs_err(fs_info, "invalid nodesize %llu", nodesize); 238821a852b0SQu Wenruo ret = -EINVAL; 238921a852b0SQu Wenruo } 239021a852b0SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 239121a852b0SQu Wenruo btrfs_err(fs_info, "invalid leafsize %u, should be %llu", 239221a852b0SQu Wenruo le32_to_cpu(sb->__unused_leafsize), nodesize); 239321a852b0SQu Wenruo ret = -EINVAL; 239421a852b0SQu Wenruo } 239521a852b0SQu Wenruo 239621a852b0SQu Wenruo /* Root alignment check */ 239721a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 239821a852b0SQu Wenruo btrfs_warn(fs_info, "tree_root block unaligned: %llu", 239921a852b0SQu Wenruo btrfs_super_root(sb)); 240021a852b0SQu Wenruo ret = -EINVAL; 240121a852b0SQu Wenruo } 240221a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 240321a852b0SQu Wenruo btrfs_warn(fs_info, "chunk_root block unaligned: %llu", 240421a852b0SQu Wenruo btrfs_super_chunk_root(sb)); 240521a852b0SQu Wenruo ret = -EINVAL; 240621a852b0SQu Wenruo } 240721a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 240821a852b0SQu Wenruo btrfs_warn(fs_info, "log_root block unaligned: %llu", 240921a852b0SQu Wenruo btrfs_super_log_root(sb)); 241021a852b0SQu Wenruo ret = -EINVAL; 241121a852b0SQu Wenruo } 241221a852b0SQu Wenruo 2413de37aa51SNikolay Borisov if (memcmp(fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid, 24147239ff4bSNikolay Borisov BTRFS_FSID_SIZE) != 0) { 241521a852b0SQu Wenruo btrfs_err(fs_info, 24167239ff4bSNikolay Borisov "dev_item UUID does not match metadata fsid: %pU != %pU", 2417de37aa51SNikolay Borisov fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid); 241821a852b0SQu Wenruo ret = -EINVAL; 241921a852b0SQu Wenruo } 242021a852b0SQu Wenruo 242121a852b0SQu Wenruo /* 242221a852b0SQu Wenruo * Hint to catch really bogus numbers, bitflips or so, more exact checks are 242321a852b0SQu Wenruo * done later 242421a852b0SQu Wenruo */ 242521a852b0SQu Wenruo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 242621a852b0SQu Wenruo btrfs_err(fs_info, "bytes_used is too small %llu", 242721a852b0SQu Wenruo btrfs_super_bytes_used(sb)); 242821a852b0SQu Wenruo ret = -EINVAL; 242921a852b0SQu Wenruo } 243021a852b0SQu Wenruo if (!is_power_of_2(btrfs_super_stripesize(sb))) { 243121a852b0SQu Wenruo btrfs_err(fs_info, "invalid stripesize %u", 243221a852b0SQu Wenruo btrfs_super_stripesize(sb)); 243321a852b0SQu Wenruo ret = -EINVAL; 243421a852b0SQu Wenruo } 243521a852b0SQu Wenruo if (btrfs_super_num_devices(sb) > (1UL << 31)) 243621a852b0SQu Wenruo btrfs_warn(fs_info, "suspicious number of devices: %llu", 243721a852b0SQu Wenruo btrfs_super_num_devices(sb)); 243821a852b0SQu Wenruo if (btrfs_super_num_devices(sb) == 0) { 243921a852b0SQu Wenruo btrfs_err(fs_info, "number of devices is 0"); 244021a852b0SQu Wenruo ret = -EINVAL; 244121a852b0SQu Wenruo } 244221a852b0SQu Wenruo 2443069ec957SQu Wenruo if (mirror_num >= 0 && 2444069ec957SQu Wenruo btrfs_super_bytenr(sb) != btrfs_sb_offset(mirror_num)) { 244521a852b0SQu Wenruo btrfs_err(fs_info, "super offset mismatch %llu != %u", 244621a852b0SQu Wenruo btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 244721a852b0SQu Wenruo ret = -EINVAL; 244821a852b0SQu Wenruo } 244921a852b0SQu Wenruo 245021a852b0SQu Wenruo /* 245121a852b0SQu Wenruo * Obvious sys_chunk_array corruptions, it must hold at least one key 245221a852b0SQu Wenruo * and one chunk 245321a852b0SQu Wenruo */ 245421a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 245521a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too big %u > %u", 245621a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 245721a852b0SQu Wenruo BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 245821a852b0SQu Wenruo ret = -EINVAL; 245921a852b0SQu Wenruo } 246021a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 246121a852b0SQu Wenruo + sizeof(struct btrfs_chunk)) { 246221a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too small %u < %zu", 246321a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 246421a852b0SQu Wenruo sizeof(struct btrfs_disk_key) 246521a852b0SQu Wenruo + sizeof(struct btrfs_chunk)); 246621a852b0SQu Wenruo ret = -EINVAL; 246721a852b0SQu Wenruo } 246821a852b0SQu Wenruo 246921a852b0SQu Wenruo /* 247021a852b0SQu Wenruo * The generation is a global counter, we'll trust it more than the others 247121a852b0SQu Wenruo * but it's still possible that it's the one that's wrong. 247221a852b0SQu Wenruo */ 247321a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 247421a852b0SQu Wenruo btrfs_warn(fs_info, 247521a852b0SQu Wenruo "suspicious: generation < chunk_root_generation: %llu < %llu", 247621a852b0SQu Wenruo btrfs_super_generation(sb), 247721a852b0SQu Wenruo btrfs_super_chunk_root_generation(sb)); 247821a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 247921a852b0SQu Wenruo && btrfs_super_cache_generation(sb) != (u64)-1) 248021a852b0SQu Wenruo btrfs_warn(fs_info, 248121a852b0SQu Wenruo "suspicious: generation < cache_generation: %llu < %llu", 248221a852b0SQu Wenruo btrfs_super_generation(sb), 248321a852b0SQu Wenruo btrfs_super_cache_generation(sb)); 248421a852b0SQu Wenruo 248521a852b0SQu Wenruo return ret; 248621a852b0SQu Wenruo } 248721a852b0SQu Wenruo 2488069ec957SQu Wenruo /* 2489069ec957SQu Wenruo * Validation of super block at mount time. 2490069ec957SQu Wenruo * Some checks already done early at mount time, like csum type and incompat 2491069ec957SQu Wenruo * flags will be skipped. 2492069ec957SQu Wenruo */ 2493069ec957SQu Wenruo static int btrfs_validate_mount_super(struct btrfs_fs_info *fs_info) 2494069ec957SQu Wenruo { 2495069ec957SQu Wenruo return validate_super(fs_info, fs_info->super_copy, 0); 2496069ec957SQu Wenruo } 2497069ec957SQu Wenruo 249875cb857dSQu Wenruo /* 249975cb857dSQu Wenruo * Validation of super block at write time. 250075cb857dSQu Wenruo * Some checks like bytenr check will be skipped as their values will be 250175cb857dSQu Wenruo * overwritten soon. 250275cb857dSQu Wenruo * Extra checks like csum type and incompat flags will be done here. 250375cb857dSQu Wenruo */ 250475cb857dSQu Wenruo static int btrfs_validate_write_super(struct btrfs_fs_info *fs_info, 250575cb857dSQu Wenruo struct btrfs_super_block *sb) 250675cb857dSQu Wenruo { 250775cb857dSQu Wenruo int ret; 250875cb857dSQu Wenruo 250975cb857dSQu Wenruo ret = validate_super(fs_info, sb, -1); 251075cb857dSQu Wenruo if (ret < 0) 251175cb857dSQu Wenruo goto out; 2512e7e16f48SJohannes Thumshirn if (!btrfs_supported_super_csum(btrfs_super_csum_type(sb))) { 251375cb857dSQu Wenruo ret = -EUCLEAN; 251475cb857dSQu Wenruo btrfs_err(fs_info, "invalid csum type, has %u want %u", 251575cb857dSQu Wenruo btrfs_super_csum_type(sb), BTRFS_CSUM_TYPE_CRC32); 251675cb857dSQu Wenruo goto out; 251775cb857dSQu Wenruo } 251875cb857dSQu Wenruo if (btrfs_super_incompat_flags(sb) & ~BTRFS_FEATURE_INCOMPAT_SUPP) { 251975cb857dSQu Wenruo ret = -EUCLEAN; 252075cb857dSQu Wenruo btrfs_err(fs_info, 252175cb857dSQu Wenruo "invalid incompat flags, has 0x%llx valid mask 0x%llx", 252275cb857dSQu Wenruo btrfs_super_incompat_flags(sb), 252375cb857dSQu Wenruo (unsigned long long)BTRFS_FEATURE_INCOMPAT_SUPP); 252475cb857dSQu Wenruo goto out; 252575cb857dSQu Wenruo } 252675cb857dSQu Wenruo out: 252775cb857dSQu Wenruo if (ret < 0) 252875cb857dSQu Wenruo btrfs_err(fs_info, 252975cb857dSQu Wenruo "super block corruption detected before writing it to disk"); 253075cb857dSQu Wenruo return ret; 253175cb857dSQu Wenruo } 253275cb857dSQu Wenruo 25336ef108ddSNikolay Borisov static int __cold init_tree_roots(struct btrfs_fs_info *fs_info) 2534b8522a1eSNikolay Borisov { 25356ef108ddSNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 2536b8522a1eSNikolay Borisov struct btrfs_super_block *sb = fs_info->super_copy; 2537b8522a1eSNikolay Borisov struct btrfs_root *tree_root = fs_info->tree_root; 2538b8522a1eSNikolay Borisov bool handle_error = false; 2539b8522a1eSNikolay Borisov int ret = 0; 2540b8522a1eSNikolay Borisov int i; 2541b8522a1eSNikolay Borisov 2542b8522a1eSNikolay Borisov for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 2543b8522a1eSNikolay Borisov u64 generation; 2544b8522a1eSNikolay Borisov int level; 2545b8522a1eSNikolay Borisov 2546b8522a1eSNikolay Borisov if (handle_error) { 2547b8522a1eSNikolay Borisov if (!IS_ERR(tree_root->node)) 2548b8522a1eSNikolay Borisov free_extent_buffer(tree_root->node); 2549b8522a1eSNikolay Borisov tree_root->node = NULL; 2550b8522a1eSNikolay Borisov 2551b8522a1eSNikolay Borisov if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) 2552b8522a1eSNikolay Borisov break; 2553b8522a1eSNikolay Borisov 2554b8522a1eSNikolay Borisov free_root_pointers(fs_info, 0); 2555b8522a1eSNikolay Borisov 2556b8522a1eSNikolay Borisov /* 2557b8522a1eSNikolay Borisov * Don't use the log in recovery mode, it won't be 2558b8522a1eSNikolay Borisov * valid 2559b8522a1eSNikolay Borisov */ 2560b8522a1eSNikolay Borisov btrfs_set_super_log_root(sb, 0); 2561b8522a1eSNikolay Borisov 2562b8522a1eSNikolay Borisov /* We can't trust the free space cache either */ 2563b8522a1eSNikolay Borisov btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2564b8522a1eSNikolay Borisov 2565b8522a1eSNikolay Borisov ret = read_backup_root(fs_info, i); 25666ef108ddSNikolay Borisov backup_index = ret; 2567b8522a1eSNikolay Borisov if (ret < 0) 2568b8522a1eSNikolay Borisov return ret; 2569b8522a1eSNikolay Borisov } 2570b8522a1eSNikolay Borisov generation = btrfs_super_generation(sb); 2571b8522a1eSNikolay Borisov level = btrfs_super_root_level(sb); 2572b8522a1eSNikolay Borisov tree_root->node = read_tree_block(fs_info, btrfs_super_root(sb), 2573b8522a1eSNikolay Borisov generation, level, NULL); 2574b8522a1eSNikolay Borisov if (IS_ERR(tree_root->node) || 2575b8522a1eSNikolay Borisov !extent_buffer_uptodate(tree_root->node)) { 2576b8522a1eSNikolay Borisov handle_error = true; 2577b8522a1eSNikolay Borisov 2578b8522a1eSNikolay Borisov if (IS_ERR(tree_root->node)) 2579b8522a1eSNikolay Borisov ret = PTR_ERR(tree_root->node); 2580b8522a1eSNikolay Borisov else if (!extent_buffer_uptodate(tree_root->node)) 2581b8522a1eSNikolay Borisov ret = -EUCLEAN; 2582b8522a1eSNikolay Borisov 2583b8522a1eSNikolay Borisov btrfs_warn(fs_info, "failed to read tree root"); 2584b8522a1eSNikolay Borisov continue; 2585b8522a1eSNikolay Borisov } 2586b8522a1eSNikolay Borisov 2587b8522a1eSNikolay Borisov btrfs_set_root_node(&tree_root->root_item, tree_root->node); 2588b8522a1eSNikolay Borisov tree_root->commit_root = btrfs_root_node(tree_root); 2589b8522a1eSNikolay Borisov btrfs_set_root_refs(&tree_root->root_item, 1); 2590b8522a1eSNikolay Borisov 2591336a0d8dSNikolay Borisov /* 2592336a0d8dSNikolay Borisov * No need to hold btrfs_root::objectid_mutex since the fs 2593336a0d8dSNikolay Borisov * hasn't been fully initialised and we are the only user 2594336a0d8dSNikolay Borisov */ 2595b8522a1eSNikolay Borisov ret = btrfs_find_highest_objectid(tree_root, 2596b8522a1eSNikolay Borisov &tree_root->highest_objectid); 2597b8522a1eSNikolay Borisov if (ret < 0) { 2598b8522a1eSNikolay Borisov handle_error = true; 2599b8522a1eSNikolay Borisov continue; 2600b8522a1eSNikolay Borisov } 2601b8522a1eSNikolay Borisov 2602b8522a1eSNikolay Borisov ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2603b8522a1eSNikolay Borisov 2604b8522a1eSNikolay Borisov ret = btrfs_read_roots(fs_info); 2605b8522a1eSNikolay Borisov if (ret < 0) { 2606b8522a1eSNikolay Borisov handle_error = true; 2607b8522a1eSNikolay Borisov continue; 2608b8522a1eSNikolay Borisov } 2609b8522a1eSNikolay Borisov 2610b8522a1eSNikolay Borisov /* All successful */ 2611b8522a1eSNikolay Borisov fs_info->generation = generation; 2612b8522a1eSNikolay Borisov fs_info->last_trans_committed = generation; 26136ef108ddSNikolay Borisov 26146ef108ddSNikolay Borisov /* Always begin writing backup roots after the one being used */ 26156ef108ddSNikolay Borisov if (backup_index < 0) { 26166ef108ddSNikolay Borisov fs_info->backup_root_index = 0; 26176ef108ddSNikolay Borisov } else { 26186ef108ddSNikolay Borisov fs_info->backup_root_index = backup_index + 1; 26196ef108ddSNikolay Borisov fs_info->backup_root_index %= BTRFS_NUM_BACKUP_ROOTS; 26206ef108ddSNikolay Borisov } 2621b8522a1eSNikolay Borisov break; 2622b8522a1eSNikolay Borisov } 2623b8522a1eSNikolay Borisov 2624b8522a1eSNikolay Borisov return ret; 2625b8522a1eSNikolay Borisov } 2626b8522a1eSNikolay Borisov 2627b105e927SDavid Sterba int __cold open_ctree(struct super_block *sb, 2628dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2629dfe25020SChris Mason char *options) 2630eb60ceacSChris Mason { 2631db94535dSChris Mason u32 sectorsize; 2632db94535dSChris Mason u32 nodesize; 263387ee04ebSChris Mason u32 stripesize; 263484234f3aSYan Zheng u64 generation; 2635f2b636e8SJosef Bacik u64 features; 263651bce6c9SJohannes Thumshirn u16 csum_type; 26373de4586cSChris Mason struct btrfs_key location; 2638a061fc8dSChris Mason struct buffer_head *bh; 26394d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2640815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2641f84a8bd6SAl Viro struct btrfs_root *tree_root; 26424d34b278SIlya Dryomov struct btrfs_root *chunk_root; 2643eb60ceacSChris Mason int ret; 2644e58ca020SYan int err = -EINVAL; 26456675df31SOmar Sandoval int clear_free_space_tree = 0; 2646581c1760SQu Wenruo int level; 26474543df7eSChris Mason 264874e4d827SDavid Sterba tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 264974e4d827SDavid Sterba chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 2650cb517eabSMiao Xie if (!tree_root || !chunk_root) { 265139279cc3SChris Mason err = -ENOMEM; 265239279cc3SChris Mason goto fail; 265339279cc3SChris Mason } 265476dda93cSYan, Zheng 265576dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 265676dda93cSYan, Zheng if (ret) { 265776dda93cSYan, Zheng err = ret; 265876dda93cSYan, Zheng goto fail; 265976dda93cSYan, Zheng } 266076dda93cSYan, Zheng 26614297ff84SJosef Bacik ret = percpu_counter_init(&fs_info->dio_bytes, 0, GFP_KERNEL); 2662e2d84521SMiao Xie if (ret) { 2663e2d84521SMiao Xie err = ret; 26649e11ceeeSJan Kara goto fail_srcu; 2665e2d84521SMiao Xie } 26664297ff84SJosef Bacik 26674297ff84SJosef Bacik ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 26684297ff84SJosef Bacik if (ret) { 26694297ff84SJosef Bacik err = ret; 26704297ff84SJosef Bacik goto fail_dio_bytes; 26714297ff84SJosef Bacik } 267209cbfeafSKirill A. Shutemov fs_info->dirty_metadata_batch = PAGE_SIZE * 2673e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2674e2d84521SMiao Xie 2675908c7f19STejun Heo ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2676963d678bSMiao Xie if (ret) { 2677963d678bSMiao Xie err = ret; 2678963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2679963d678bSMiao Xie } 2680963d678bSMiao Xie 26817f8d236aSDavid Sterba ret = percpu_counter_init(&fs_info->dev_replace.bio_counter, 0, 26827f8d236aSDavid Sterba GFP_KERNEL); 2683c404e0dcSMiao Xie if (ret) { 2684c404e0dcSMiao Xie err = ret; 2685c404e0dcSMiao Xie goto fail_delalloc_bytes; 2686c404e0dcSMiao Xie } 2687c404e0dcSMiao Xie 268876dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2689f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 26908fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2691facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 269224bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2693eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 269411833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2695eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2696a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 269776dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 269824bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 26994cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 2700ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2701f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 270247ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2703f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2704d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 270567c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 27067585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2707573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2708de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 270919c00ddcSChris Mason 27100b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 27116324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2712f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 271347ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 2714c8bf1b67SDavid Sterba extent_map_tree_init(&fs_info->mapping_tree); 271566d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 271666d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 271766d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 271866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 271966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 272066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 272166d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2722ba2c4d4eSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_refs_rsv, 2723ba2c4d4eSJosef Bacik BTRFS_BLOCK_RSV_DELREFS); 2724ba2c4d4eSJosef Bacik 2725771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 27264cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 27272fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2728034f784dSJosef Bacik atomic_set(&fs_info->nr_delayed_iputs, 0); 2729fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 2730e20d96d6SChris Mason fs_info->sb = sb; 273195ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 27329ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 27334cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2734a5ed45f8SNikolay Borisov atomic64_set(&fs_info->free_chunk_space, 0); 2735f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 27368b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2737f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 273890519d66SArne Jansen /* readahead state */ 2739d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 274090519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2741fd708b81SJosef Bacik btrfs_init_ref_verify(fs_info); 2742c8b97818SChris Mason 2743b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2744b34b086cSChris Mason num_online_cpus() + 2, 8); 27450afbaf8cSChris Mason 2746199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2747199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 274869fe2d75SJosef Bacik 274969fe2d75SJosef Bacik fs_info->btree_inode = new_inode(sb); 275069fe2d75SJosef Bacik if (!fs_info->btree_inode) { 275169fe2d75SJosef Bacik err = -ENOMEM; 275269fe2d75SJosef Bacik goto fail_bio_counter; 275369fe2d75SJosef Bacik } 275469fe2d75SJosef Bacik mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 275569fe2d75SJosef Bacik 275616cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 275774e4d827SDavid Sterba GFP_KERNEL); 275816cdcec7SMiao Xie if (!fs_info->delayed_root) { 275916cdcec7SMiao Xie err = -ENOMEM; 276016cdcec7SMiao Xie goto fail_iput; 276116cdcec7SMiao Xie } 276216cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 27633eaa2885SChris Mason 2764638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 276521adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 276621adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 276721adbd5cSStefan Behrens #endif 2768779a65a4SEric Sandeen btrfs_init_balance(fs_info); 276921c7e756SMiao Xie btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); 2770a2de733cSArne Jansen 27719f6d2510SDavid Sterba sb->s_blocksize = BTRFS_BDEV_BLOCKSIZE; 27729f6d2510SDavid Sterba sb->s_blocksize_bits = blksize_bits(BTRFS_BDEV_BLOCKSIZE); 2773a061fc8dSChris Mason 27746bccf3abSJeff Mahoney btrfs_init_btree_inode(fs_info); 277539279cc3SChris Mason 2776e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 27776bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2778a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2779925baeddSChris Mason 278043eb5f29SQu Wenruo extent_io_tree_init(fs_info, &fs_info->freed_extents[0], 278143eb5f29SQu Wenruo IO_TREE_FS_INFO_FREED_EXTENTS0, NULL); 278243eb5f29SQu Wenruo extent_io_tree_init(fs_info, &fs_info->freed_extents[1], 278343eb5f29SQu Wenruo IO_TREE_FS_INFO_FREED_EXTENTS1, NULL); 278411833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2785afcdd129SJosef Bacik set_bit(BTRFS_FS_BARRIER, &fs_info->flags); 2786509659cdSChris Mason 27875a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 278879154b1bSChris Mason mutex_init(&fs_info->tree_log_mutex); 2789925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2790a74a4b97SChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2791a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 27921bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 27939e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2794c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 279576dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2796803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2797fa9c0d79SChris Mason 2798ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2799f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2800b0643e59SDennis Zhou btrfs_discard_init(fs_info); 2801416ac51dSArne Jansen 2802fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2803fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2804fa9c0d79SChris Mason 2805e6dcd2dcSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 2806f9295749SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2807bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 28084854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 2809034f784dSJosef Bacik init_waitqueue_head(&fs_info->delayed_iputs_wait); 28103768f368SChris Mason 2811da17066cSJeff Mahoney /* Usable values until the real ones are cached from the superblock */ 2812da17066cSJeff Mahoney fs_info->nodesize = 4096; 2813da17066cSJeff Mahoney fs_info->sectorsize = 4096; 2814da17066cSJeff Mahoney fs_info->stripesize = 4096; 2815da17066cSJeff Mahoney 2816eede2bf3SOmar Sandoval spin_lock_init(&fs_info->swapfile_pins_lock); 2817eede2bf3SOmar Sandoval fs_info->swapfile_pins = RB_ROOT; 2818eede2bf3SOmar Sandoval 28199e967495SFilipe Manana fs_info->send_in_progress = 0; 28209e967495SFilipe Manana 282153b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 282253b381b3SDavid Woodhouse if (ret) { 282383c8266aSDavid Sterba err = ret; 282453b381b3SDavid Woodhouse goto fail_alloc; 282553b381b3SDavid Woodhouse } 282653b381b3SDavid Woodhouse 2827da17066cSJeff Mahoney __setup_root(tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID); 28287eccb903SChris Mason 28293c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 28301104a885SDavid Sterba 28311104a885SDavid Sterba /* 28321104a885SDavid Sterba * Read super block and check the signature bytes only 28331104a885SDavid Sterba */ 2834a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 283592fc03fbSAnand Jain if (IS_ERR(bh)) { 283692fc03fbSAnand Jain err = PTR_ERR(bh); 283716cdcec7SMiao Xie goto fail_alloc; 283820b45077SDave Young } 283939279cc3SChris Mason 28401104a885SDavid Sterba /* 28418dc3f22cSJohannes Thumshirn * Verify the type first, if that or the the checksum value are 28428dc3f22cSJohannes Thumshirn * corrupted, we'll find out 28438dc3f22cSJohannes Thumshirn */ 284451bce6c9SJohannes Thumshirn csum_type = btrfs_super_csum_type((struct btrfs_super_block *)bh->b_data); 284551bce6c9SJohannes Thumshirn if (!btrfs_supported_super_csum(csum_type)) { 28468dc3f22cSJohannes Thumshirn btrfs_err(fs_info, "unsupported checksum algorithm: %u", 284751bce6c9SJohannes Thumshirn csum_type); 28488dc3f22cSJohannes Thumshirn err = -EINVAL; 28498dc3f22cSJohannes Thumshirn brelse(bh); 28508dc3f22cSJohannes Thumshirn goto fail_alloc; 28518dc3f22cSJohannes Thumshirn } 28528dc3f22cSJohannes Thumshirn 28536d97c6e3SJohannes Thumshirn ret = btrfs_init_csum_hash(fs_info, csum_type); 28546d97c6e3SJohannes Thumshirn if (ret) { 28556d97c6e3SJohannes Thumshirn err = ret; 28566d97c6e3SJohannes Thumshirn goto fail_alloc; 28576d97c6e3SJohannes Thumshirn } 28586d97c6e3SJohannes Thumshirn 28598dc3f22cSJohannes Thumshirn /* 28601104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 28611104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 28621104a885SDavid Sterba */ 2863ab8d0fc4SJeff Mahoney if (btrfs_check_super_csum(fs_info, bh->b_data)) { 286405135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 28651104a885SDavid Sterba err = -EINVAL; 2866b2acdddfSAnand Jain brelse(bh); 28676d97c6e3SJohannes Thumshirn goto fail_csum; 28681104a885SDavid Sterba } 28691104a885SDavid Sterba 28701104a885SDavid Sterba /* 28711104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 28721104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 28731104a885SDavid Sterba * the whole block of INFO_SIZE 28741104a885SDavid Sterba */ 28756c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 2876a061fc8dSChris Mason brelse(bh); 28775f39d397SChris Mason 2878fbc6feaeSNikolay Borisov disk_super = fs_info->super_copy; 2879fbc6feaeSNikolay Borisov 2880de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->fsid, fs_info->super_copy->fsid, 2881de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 2882de37aa51SNikolay Borisov 28837239ff4bSNikolay Borisov if (btrfs_fs_incompat(fs_info, METADATA_UUID)) { 2884de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->metadata_uuid, 2885de37aa51SNikolay Borisov fs_info->super_copy->metadata_uuid, 2886de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 28877239ff4bSNikolay Borisov } 28880b86a832SChris Mason 2889fbc6feaeSNikolay Borisov features = btrfs_super_flags(disk_super); 2890fbc6feaeSNikolay Borisov if (features & BTRFS_SUPER_FLAG_CHANGING_FSID_V2) { 2891fbc6feaeSNikolay Borisov features &= ~BTRFS_SUPER_FLAG_CHANGING_FSID_V2; 2892fbc6feaeSNikolay Borisov btrfs_set_super_flags(disk_super, features); 2893fbc6feaeSNikolay Borisov btrfs_info(fs_info, 2894fbc6feaeSNikolay Borisov "found metadata UUID change in progress flag, clearing"); 2895fbc6feaeSNikolay Borisov } 2896fbc6feaeSNikolay Borisov 2897fbc6feaeSNikolay Borisov memcpy(fs_info->super_for_commit, fs_info->super_copy, 2898fbc6feaeSNikolay Borisov sizeof(*fs_info->super_for_commit)); 2899de37aa51SNikolay Borisov 2900069ec957SQu Wenruo ret = btrfs_validate_mount_super(fs_info); 29011104a885SDavid Sterba if (ret) { 290205135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 29031104a885SDavid Sterba err = -EINVAL; 29046d97c6e3SJohannes Thumshirn goto fail_csum; 29051104a885SDavid Sterba } 29061104a885SDavid Sterba 29070f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 29086d97c6e3SJohannes Thumshirn goto fail_csum; 29090f7d52f4SChris Mason 2910acce952bSliubo /* check FS state, whether FS is broken. */ 291187533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 291287533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2913acce952bSliubo 291475e7cb7fSLiu Bo /* 291575e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 291675e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 291775e7cb7fSLiu Bo */ 291875e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 291975e7cb7fSLiu Bo 29202ff7e61eSJeff Mahoney ret = btrfs_parse_options(fs_info, options, sb->s_flags); 29212b82032cSYan Zheng if (ret) { 29222b82032cSYan Zheng err = ret; 29236d97c6e3SJohannes Thumshirn goto fail_csum; 29242b82032cSYan Zheng } 2925dfe25020SChris Mason 2926f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2927f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2928f2b636e8SJosef Bacik if (features) { 292905135f59SDavid Sterba btrfs_err(fs_info, 293005135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 2931c1c9ff7cSGeert Uytterhoeven features); 2932f2b636e8SJosef Bacik err = -EINVAL; 29336d97c6e3SJohannes Thumshirn goto fail_csum; 2934f2b636e8SJosef Bacik } 2935f2b636e8SJosef Bacik 29365d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 29375d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 29380b246afaSJeff Mahoney if (fs_info->compress_type == BTRFS_COMPRESS_LZO) 2939a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 29405c1aab1dSNick Terrell else if (fs_info->compress_type == BTRFS_COMPRESS_ZSTD) 29415c1aab1dSNick Terrell features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD; 2942727011e0SChris Mason 29433173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 294405135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 29453173a18fSJosef Bacik 2946727011e0SChris Mason /* 2947727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2948727011e0SChris Mason * they are bigger than the page size 2949727011e0SChris Mason */ 295009cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 2951727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 295205135f59SDavid Sterba btrfs_info(fs_info, 295305135f59SDavid Sterba "flagging fs with big metadata feature"); 2954727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2955727011e0SChris Mason } 2956727011e0SChris Mason 2957bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2958bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2959b7f67055SChandan Rajendra stripesize = sectorsize; 2960707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 2961963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2962bc3f116fSChris Mason 2963da17066cSJeff Mahoney /* Cache block sizes */ 2964da17066cSJeff Mahoney fs_info->nodesize = nodesize; 2965da17066cSJeff Mahoney fs_info->sectorsize = sectorsize; 2966da17066cSJeff Mahoney fs_info->stripesize = stripesize; 2967da17066cSJeff Mahoney 2968bc3f116fSChris Mason /* 2969bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2970bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2971bc3f116fSChris Mason */ 2972bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2973707e8a07SDavid Sterba (sectorsize != nodesize)) { 297405135f59SDavid Sterba btrfs_err(fs_info, 297505135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 297605135f59SDavid Sterba nodesize, sectorsize); 29776d97c6e3SJohannes Thumshirn goto fail_csum; 2978bc3f116fSChris Mason } 2979bc3f116fSChris Mason 2980ceda0864SMiao Xie /* 2981ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2982ceda0864SMiao Xie * update the flag. 2983ceda0864SMiao Xie */ 29845d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 29855d4f98a2SYan Zheng 2986f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2987f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2988bc98a42cSDavid Howells if (!sb_rdonly(sb) && features) { 298905135f59SDavid Sterba btrfs_err(fs_info, 299005135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 2991c1c9ff7cSGeert Uytterhoeven features); 2992f2b636e8SJosef Bacik err = -EINVAL; 29936d97c6e3SJohannes Thumshirn goto fail_csum; 2994f2b636e8SJosef Bacik } 299561d92c32SChris Mason 29962a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 29972a458198SEric Sandeen if (ret) { 29982a458198SEric Sandeen err = ret; 29990dc3b84aSJosef Bacik goto fail_sb_buffer; 30000dc3b84aSJosef Bacik } 30014543df7eSChris Mason 30029e11ceeeSJan Kara sb->s_bdi->congested_fn = btrfs_congested_fn; 30039e11ceeeSJan Kara sb->s_bdi->congested_data = fs_info; 30049e11ceeeSJan Kara sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 3005b5420237SNikolay Borisov sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; 30069e11ceeeSJan Kara sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); 30079e11ceeeSJan Kara sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); 30084575c9ccSChris Mason 3009a061fc8dSChris Mason sb->s_blocksize = sectorsize; 3010a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 3011de37aa51SNikolay Borisov memcpy(&sb->s_uuid, fs_info->fs_devices->fsid, BTRFS_FSID_SIZE); 3012db94535dSChris Mason 3013925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 30146bccf3abSJeff Mahoney ret = btrfs_read_sys_array(fs_info); 3015925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 301684eed90fSChris Mason if (ret) { 301705135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 30185d4f98a2SYan Zheng goto fail_sb_buffer; 301984eed90fSChris Mason } 30200b86a832SChris Mason 302184234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 3022581c1760SQu Wenruo level = btrfs_super_chunk_root_level(disk_super); 30230b86a832SChris Mason 3024da17066cSJeff Mahoney __setup_root(chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 30250b86a832SChris Mason 30262ff7e61eSJeff Mahoney chunk_root->node = read_tree_block(fs_info, 30270b86a832SChris Mason btrfs_super_chunk_root(disk_super), 3028581c1760SQu Wenruo generation, level, NULL); 302964c043deSLiu Bo if (IS_ERR(chunk_root->node) || 303064c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 303105135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 3032e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 3033e5fffbacSchandan free_extent_buffer(chunk_root->node); 303495ab1f64SZhao Lei chunk_root->node = NULL; 3035af31f5e5SChris Mason goto fail_tree_roots; 303683121942SDavid Woodhouse } 30375d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 30385d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 30390b86a832SChris Mason 3040e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 3041b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); 3042e17cade2SChris Mason 30435b4aacefSJeff Mahoney ret = btrfs_read_chunk_tree(fs_info); 30442b82032cSYan Zheng if (ret) { 304505135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 3046af31f5e5SChris Mason goto fail_tree_roots; 30472b82032cSYan Zheng } 30480b86a832SChris Mason 30498dabb742SStefan Behrens /* 30509b99b115SAnand Jain * Keep the devid that is marked to be the target device for the 30519b99b115SAnand Jain * device replace procedure 30528dabb742SStefan Behrens */ 30539b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 0); 3054dfe25020SChris Mason 3055a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 305605135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 3057a6b0d5c8SChris Mason goto fail_tree_roots; 3058a6b0d5c8SChris Mason } 3059a6b0d5c8SChris Mason 3060b8522a1eSNikolay Borisov ret = init_tree_roots(fs_info); 30614bbcaa64SEric Sandeen if (ret) 3062b8522a1eSNikolay Borisov goto fail_tree_roots; 30638929ecfaSYan, Zheng 3064cf90d884SQu Wenruo ret = btrfs_verify_dev_extents(fs_info); 3065cf90d884SQu Wenruo if (ret) { 3066cf90d884SQu Wenruo btrfs_err(fs_info, 3067cf90d884SQu Wenruo "failed to verify dev extents against chunks: %d", 3068cf90d884SQu Wenruo ret); 3069cf90d884SQu Wenruo goto fail_block_groups; 3070cf90d884SQu Wenruo } 307168310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 307268310a5eSIlya Dryomov if (ret) { 307305135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 307468310a5eSIlya Dryomov goto fail_block_groups; 307568310a5eSIlya Dryomov } 307668310a5eSIlya Dryomov 3077733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 3078733f4fbbSStefan Behrens if (ret) { 307905135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 3080733f4fbbSStefan Behrens goto fail_block_groups; 3081733f4fbbSStefan Behrens } 3082733f4fbbSStefan Behrens 30838dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 30848dabb742SStefan Behrens if (ret) { 308505135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 30868dabb742SStefan Behrens goto fail_block_groups; 30878dabb742SStefan Behrens } 30888dabb742SStefan Behrens 30899b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 1); 30908dabb742SStefan Behrens 3091c6761a9eSAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices); 3092b7c35e81SAnand Jain if (ret) { 309305135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 309405135f59SDavid Sterba ret); 3095b7c35e81SAnand Jain goto fail_block_groups; 3096b7c35e81SAnand Jain } 3097b7c35e81SAnand Jain 309896f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 30995ac1d209SJeff Mahoney if (ret) { 310005135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 3101b7c35e81SAnand Jain goto fail_fsdev_sysfs; 31025ac1d209SJeff Mahoney } 31035ac1d209SJeff Mahoney 3104c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 3105c59021f8Sliubo if (ret) { 310605135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 31072365dd3cSAnand Jain goto fail_sysfs; 3108c59021f8Sliubo } 3109c59021f8Sliubo 31105b4aacefSJeff Mahoney ret = btrfs_read_block_groups(fs_info); 31111b1d1f66SJosef Bacik if (ret) { 311205135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 31132365dd3cSAnand Jain goto fail_sysfs; 31141b1d1f66SJosef Bacik } 31154330e183SQu Wenruo 31166528b99dSAnand Jain if (!sb_rdonly(sb) && !btrfs_check_rw_degradable(fs_info, NULL)) { 311705135f59SDavid Sterba btrfs_warn(fs_info, 311852042d8eSAndrea Gelmini "writable mount is not allowed due to too many missing devices"); 31192365dd3cSAnand Jain goto fail_sysfs; 3120292fd7fcSStefan Behrens } 31219078a3e1SChris Mason 3122a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3123a74a4b97SChris Mason "btrfs-cleaner"); 312457506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 31252365dd3cSAnand Jain goto fail_sysfs; 3126a74a4b97SChris Mason 3127a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3128a74a4b97SChris Mason tree_root, 3129a74a4b97SChris Mason "btrfs-transaction"); 313057506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 31313f157a2fSChris Mason goto fail_cleaner; 3132a74a4b97SChris Mason 3133583b7231SHans van Kranenburg if (!btrfs_test_opt(fs_info, NOSSD) && 3134c289811cSChris Mason !fs_info->fs_devices->rotating) { 3135583b7231SHans van Kranenburg btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations"); 3136c289811cSChris Mason } 3137c289811cSChris Mason 3138572d9ab7SDavid Sterba /* 313901327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3140572d9ab7SDavid Sterba * not have to wait for transaction commit 3141572d9ab7SDavid Sterba */ 3142572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 31433818aea2SQu Wenruo 314421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 31450b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) { 31462ff7e61eSJeff Mahoney ret = btrfsic_mount(fs_info, fs_devices, 31470b246afaSJeff Mahoney btrfs_test_opt(fs_info, 314821adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 314921adbd5cSStefan Behrens 1 : 0, 315021adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 315121adbd5cSStefan Behrens if (ret) 315205135f59SDavid Sterba btrfs_warn(fs_info, 315305135f59SDavid Sterba "failed to initialize integrity check module: %d", 315405135f59SDavid Sterba ret); 315521adbd5cSStefan Behrens } 315621adbd5cSStefan Behrens #endif 3157bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3158bcef60f2SArne Jansen if (ret) 3159bcef60f2SArne Jansen goto fail_trans_kthread; 316021adbd5cSStefan Behrens 3161fd708b81SJosef Bacik if (btrfs_build_ref_tree(fs_info)) 3162fd708b81SJosef Bacik btrfs_err(fs_info, "couldn't build ref tree"); 3163fd708b81SJosef Bacik 316496da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 316596da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 31660b246afaSJeff Mahoney !btrfs_test_opt(fs_info, NOLOGREPLAY)) { 3167e8294f2fSDavid Sterba btrfs_info(fs_info, "start tree-log replay"); 316863443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 316979787eaaSJeff Mahoney if (ret) { 317063443bf5SEric Sandeen err = ret; 317128c16cbbSWang Shilong goto fail_qgroup; 3172e556ce2cSYan Zheng } 3173e02119d5SChris Mason } 31741a40e23bSZheng Yan 31756bccf3abSJeff Mahoney ret = btrfs_find_orphan_roots(fs_info); 317679787eaaSJeff Mahoney if (ret) 317728c16cbbSWang Shilong goto fail_qgroup; 317876dda93cSYan, Zheng 3179bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3180d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 318144c44af2SIlya Dryomov if (ret) 318228c16cbbSWang Shilong goto fail_qgroup; 318390c711abSZygo Blaxell 318490c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 31855d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 318690c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3187d7ce5843SMiao Xie if (ret < 0) { 318805135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 318905135f59SDavid Sterba ret); 3190d7ce5843SMiao Xie err = -EINVAL; 3191bcef60f2SArne Jansen goto fail_qgroup; 3192d7ce5843SMiao Xie } 31937c2ca468SChris Mason } 31941a40e23bSZheng Yan 31953de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 31963de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 3197cb517eabSMiao Xie location.offset = 0; 31983de4586cSChris Mason 31993de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 32003140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 32013140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3202f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read fs tree: %d", err); 3203315bf8efSJosef Bacik fs_info->fs_root = NULL; 3204bcef60f2SArne Jansen goto fail_qgroup; 32053140c9a3SDan Carpenter } 3206c289811cSChris Mason 3207bc98a42cSDavid Howells if (sb_rdonly(sb)) 32082b6ba629SIlya Dryomov return 0; 32092b6ba629SIlya Dryomov 3210f8d468a1SOmar Sandoval if (btrfs_test_opt(fs_info, CLEAR_CACHE) && 3211f8d468a1SOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 32126675df31SOmar Sandoval clear_free_space_tree = 1; 32136675df31SOmar Sandoval } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && 32146675df31SOmar Sandoval !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) { 32156675df31SOmar Sandoval btrfs_warn(fs_info, "free space tree is invalid"); 32166675df31SOmar Sandoval clear_free_space_tree = 1; 32176675df31SOmar Sandoval } 32186675df31SOmar Sandoval 32196675df31SOmar Sandoval if (clear_free_space_tree) { 3220f8d468a1SOmar Sandoval btrfs_info(fs_info, "clearing free space tree"); 3221f8d468a1SOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 3222f8d468a1SOmar Sandoval if (ret) { 3223f8d468a1SOmar Sandoval btrfs_warn(fs_info, 3224f8d468a1SOmar Sandoval "failed to clear free space tree: %d", ret); 32256bccf3abSJeff Mahoney close_ctree(fs_info); 3226f8d468a1SOmar Sandoval return ret; 3227f8d468a1SOmar Sandoval } 3228f8d468a1SOmar Sandoval } 3229f8d468a1SOmar Sandoval 32300b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) && 3231511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 323205135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3233511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3234511711afSChris Mason if (ret) { 323505135f59SDavid Sterba btrfs_warn(fs_info, 323605135f59SDavid Sterba "failed to create free space tree: %d", ret); 32376bccf3abSJeff Mahoney close_ctree(fs_info); 3238511711afSChris Mason return ret; 3239511711afSChris Mason } 3240511711afSChris Mason } 3241511711afSChris Mason 3242e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 32432b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 32442b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 32452b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 32466bccf3abSJeff Mahoney close_ctree(fs_info); 32472b6ba629SIlya Dryomov return ret; 32482b6ba629SIlya Dryomov } 3249e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 325059641015SIlya Dryomov 32512b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 32522b6ba629SIlya Dryomov if (ret) { 325305135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 32546bccf3abSJeff Mahoney close_ctree(fs_info); 32552b6ba629SIlya Dryomov return ret; 3256e3acc2a6SJosef Bacik } 3257e3acc2a6SJosef Bacik 32588dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 32598dabb742SStefan Behrens if (ret) { 326005135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 32616bccf3abSJeff Mahoney close_ctree(fs_info); 32628dabb742SStefan Behrens return ret; 32638dabb742SStefan Behrens } 32648dabb742SStefan Behrens 3265b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3266b0643e59SDennis Zhou btrfs_discard_resume(fs_info); 3267b382a324SJan Schmidt 32684bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 326905135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3270f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3271f7a81ea4SStefan Behrens if (ret) { 327205135f59SDavid Sterba btrfs_warn(fs_info, 327305135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 32746bccf3abSJeff Mahoney close_ctree(fs_info); 3275f7a81ea4SStefan Behrens return ret; 3276f7a81ea4SStefan Behrens } 32770b246afaSJeff Mahoney } else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || 32784bbcaa64SEric Sandeen fs_info->generation != 32794bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 328005135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 328170f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 328270f80175SStefan Behrens if (ret) { 328305135f59SDavid Sterba btrfs_warn(fs_info, 328405135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 32856bccf3abSJeff Mahoney close_ctree(fs_info); 328670f80175SStefan Behrens return ret; 328770f80175SStefan Behrens } 328870f80175SStefan Behrens } else { 3289afcdd129SJosef Bacik set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); 3290f7a81ea4SStefan Behrens } 3291afcdd129SJosef Bacik set_bit(BTRFS_FS_OPEN, &fs_info->flags); 329247ab2a6cSJosef Bacik 32938dcddfa0SQu Wenruo /* 32948dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 32958dcddfa0SQu Wenruo * no need to keep the flag 32968dcddfa0SQu Wenruo */ 32978dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 32988dcddfa0SQu Wenruo 3299ad2b2c80SAl Viro return 0; 330039279cc3SChris Mason 3301bcef60f2SArne Jansen fail_qgroup: 3302bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 33037c2ca468SChris Mason fail_trans_kthread: 33047c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 33052ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 3306faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 33073f157a2fSChris Mason fail_cleaner: 3308a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 33097c2ca468SChris Mason 33107c2ca468SChris Mason /* 33117c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 33127c2ca468SChris Mason * kthreads 33137c2ca468SChris Mason */ 33147c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 33157c2ca468SChris Mason 33162365dd3cSAnand Jain fail_sysfs: 33176618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 33182365dd3cSAnand Jain 3319b7c35e81SAnand Jain fail_fsdev_sysfs: 3320b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3321b7c35e81SAnand Jain 33221b1d1f66SJosef Bacik fail_block_groups: 332354067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 3324af31f5e5SChris Mason 3325af31f5e5SChris Mason fail_tree_roots: 33264273eaffSAnand Jain free_root_pointers(fs_info, true); 33272b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3328af31f5e5SChris Mason 332939279cc3SChris Mason fail_sb_buffer: 33307abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 33315cdd7db6SFilipe Manana btrfs_free_block_groups(fs_info); 33326d97c6e3SJohannes Thumshirn fail_csum: 33336d97c6e3SJohannes Thumshirn btrfs_free_csum_hash(fs_info); 333416cdcec7SMiao Xie fail_alloc: 33354543df7eSChris Mason fail_iput: 3336586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3337586e46e2SIlya Dryomov 33384543df7eSChris Mason iput(fs_info->btree_inode); 3339c404e0dcSMiao Xie fail_bio_counter: 33407f8d236aSDavid Sterba percpu_counter_destroy(&fs_info->dev_replace.bio_counter); 3341963d678bSMiao Xie fail_delalloc_bytes: 3342963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3343e2d84521SMiao Xie fail_dirty_metadata_bytes: 3344e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 33454297ff84SJosef Bacik fail_dio_bytes: 33464297ff84SJosef Bacik percpu_counter_destroy(&fs_info->dio_bytes); 334776dda93cSYan, Zheng fail_srcu: 334876dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 33497e662854SQinghuang Feng fail: 335053b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 3351586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3352ad2b2c80SAl Viro return err; 3353eb60ceacSChris Mason } 3354663faf9fSMasami Hiramatsu ALLOW_ERROR_INJECTION(open_ctree, ERRNO); 3355eb60ceacSChris Mason 3356f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 3357f2984462SChris Mason { 3358f2984462SChris Mason if (uptodate) { 3359f2984462SChris Mason set_buffer_uptodate(bh); 3360f2984462SChris Mason } else { 3361442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 3362442a4f63SStefan Behrens bh->b_private; 3363442a4f63SStefan Behrens 3364fb456252SJeff Mahoney btrfs_warn_rl_in_rcu(device->fs_info, 3365b14af3b4SDavid Sterba "lost page write due to IO error on %s", 3366606686eeSJosef Bacik rcu_str_deref(device->name)); 336701327610SNicholas D Steeves /* note, we don't set_buffer_write_io_error because we have 33681259ab75SChris Mason * our own ways of dealing with the IO errors 33691259ab75SChris Mason */ 3370f2984462SChris Mason clear_buffer_uptodate(bh); 3371442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 3372f2984462SChris Mason } 3373f2984462SChris Mason unlock_buffer(bh); 3374f2984462SChris Mason put_bh(bh); 3375f2984462SChris Mason } 3376f2984462SChris Mason 337729c36d72SAnand Jain int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, 337829c36d72SAnand Jain struct buffer_head **bh_ret) 337929c36d72SAnand Jain { 338029c36d72SAnand Jain struct buffer_head *bh; 338129c36d72SAnand Jain struct btrfs_super_block *super; 338229c36d72SAnand Jain u64 bytenr; 338329c36d72SAnand Jain 338429c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 338529c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 338629c36d72SAnand Jain return -EINVAL; 338729c36d72SAnand Jain 33889f6d2510SDavid Sterba bh = __bread(bdev, bytenr / BTRFS_BDEV_BLOCKSIZE, BTRFS_SUPER_INFO_SIZE); 338929c36d72SAnand Jain /* 339029c36d72SAnand Jain * If we fail to read from the underlying devices, as of now 339129c36d72SAnand Jain * the best option we have is to mark it EIO. 339229c36d72SAnand Jain */ 339329c36d72SAnand Jain if (!bh) 339429c36d72SAnand Jain return -EIO; 339529c36d72SAnand Jain 339629c36d72SAnand Jain super = (struct btrfs_super_block *)bh->b_data; 339729c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 339829c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 339929c36d72SAnand Jain brelse(bh); 340029c36d72SAnand Jain return -EINVAL; 340129c36d72SAnand Jain } 340229c36d72SAnand Jain 340329c36d72SAnand Jain *bh_ret = bh; 340429c36d72SAnand Jain return 0; 340529c36d72SAnand Jain } 340629c36d72SAnand Jain 340729c36d72SAnand Jain 3408a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 3409a512bbf8SYan Zheng { 3410a512bbf8SYan Zheng struct buffer_head *bh; 3411a512bbf8SYan Zheng struct buffer_head *latest = NULL; 3412a512bbf8SYan Zheng struct btrfs_super_block *super; 3413a512bbf8SYan Zheng int i; 3414a512bbf8SYan Zheng u64 transid = 0; 341592fc03fbSAnand Jain int ret = -EINVAL; 3416a512bbf8SYan Zheng 3417a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3418a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3419a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3420a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3421a512bbf8SYan Zheng */ 3422a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 342329c36d72SAnand Jain ret = btrfs_read_dev_one_super(bdev, i, &bh); 342429c36d72SAnand Jain if (ret) 3425a512bbf8SYan Zheng continue; 3426a512bbf8SYan Zheng 3427a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 3428a512bbf8SYan Zheng 3429a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 3430a512bbf8SYan Zheng brelse(latest); 3431a512bbf8SYan Zheng latest = bh; 3432a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3433a512bbf8SYan Zheng } else { 3434a512bbf8SYan Zheng brelse(bh); 3435a512bbf8SYan Zheng } 3436a512bbf8SYan Zheng } 343792fc03fbSAnand Jain 343892fc03fbSAnand Jain if (!latest) 343992fc03fbSAnand Jain return ERR_PTR(ret); 344092fc03fbSAnand Jain 3441a512bbf8SYan Zheng return latest; 3442a512bbf8SYan Zheng } 3443a512bbf8SYan Zheng 34444eedeb75SHisashi Hifumi /* 3445abbb3b8eSDavid Sterba * Write superblock @sb to the @device. Do not wait for completion, all the 3446abbb3b8eSDavid Sterba * buffer heads we write are pinned. 34474eedeb75SHisashi Hifumi * 3448abbb3b8eSDavid Sterba * Write @max_mirrors copies of the superblock, where 0 means default that fit 3449abbb3b8eSDavid Sterba * the expected device size at commit time. Note that max_mirrors must be 3450abbb3b8eSDavid Sterba * same for write and wait phases. 34514eedeb75SHisashi Hifumi * 3452abbb3b8eSDavid Sterba * Return number of errors when buffer head is not found or submission fails. 34534eedeb75SHisashi Hifumi */ 3454a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3455abbb3b8eSDavid Sterba struct btrfs_super_block *sb, int max_mirrors) 3456a512bbf8SYan Zheng { 3457d5178578SJohannes Thumshirn struct btrfs_fs_info *fs_info = device->fs_info; 3458d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 3459a512bbf8SYan Zheng struct buffer_head *bh; 3460a512bbf8SYan Zheng int i; 3461a512bbf8SYan Zheng int ret; 3462a512bbf8SYan Zheng int errors = 0; 3463a512bbf8SYan Zheng u64 bytenr; 34641b9e619cSOmar Sandoval int op_flags; 3465a512bbf8SYan Zheng 3466a512bbf8SYan Zheng if (max_mirrors == 0) 3467a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3468a512bbf8SYan Zheng 3469d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 3470d5178578SJohannes Thumshirn 3471a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3472a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3473935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3474935e5cc9SMiao Xie device->commit_total_bytes) 3475a512bbf8SYan Zheng break; 3476a512bbf8SYan Zheng 3477a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3478a512bbf8SYan Zheng 3479d5178578SJohannes Thumshirn crypto_shash_init(shash); 3480d5178578SJohannes Thumshirn crypto_shash_update(shash, (const char *)sb + BTRFS_CSUM_SIZE, 3481abbb3b8eSDavid Sterba BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 3482d5178578SJohannes Thumshirn crypto_shash_final(shash, sb->csum); 3483a512bbf8SYan Zheng 3484abbb3b8eSDavid Sterba /* One reference for us, and we leave it for the caller */ 34859f6d2510SDavid Sterba bh = __getblk(device->bdev, bytenr / BTRFS_BDEV_BLOCKSIZE, 3486a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3487634554dcSJosef Bacik if (!bh) { 3488fb456252SJeff Mahoney btrfs_err(device->fs_info, 3489f14d104dSDavid Sterba "couldn't get super buffer head for bytenr %llu", 3490f14d104dSDavid Sterba bytenr); 3491634554dcSJosef Bacik errors++; 3492634554dcSJosef Bacik continue; 3493634554dcSJosef Bacik } 3494634554dcSJosef Bacik 3495a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3496a512bbf8SYan Zheng 34974eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3498a512bbf8SYan Zheng get_bh(bh); 34994eedeb75SHisashi Hifumi 35004eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3501a512bbf8SYan Zheng lock_buffer(bh); 3502a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3503442a4f63SStefan Behrens bh->b_private = device; 3504a512bbf8SYan Zheng 3505387125fcSChris Mason /* 3506387125fcSChris Mason * we fua the first super. The others we allow 3507387125fcSChris Mason * to go down lazy. 3508387125fcSChris Mason */ 35091b9e619cSOmar Sandoval op_flags = REQ_SYNC | REQ_META | REQ_PRIO; 35101b9e619cSOmar Sandoval if (i == 0 && !btrfs_test_opt(device->fs_info, NOBARRIER)) 35111b9e619cSOmar Sandoval op_flags |= REQ_FUA; 35121b9e619cSOmar Sandoval ret = btrfsic_submit_bh(REQ_OP_WRITE, op_flags, bh); 35134eedeb75SHisashi Hifumi if (ret) 3514a512bbf8SYan Zheng errors++; 3515a512bbf8SYan Zheng } 3516a512bbf8SYan Zheng return errors < i ? 0 : -1; 3517a512bbf8SYan Zheng } 3518a512bbf8SYan Zheng 3519387125fcSChris Mason /* 3520abbb3b8eSDavid Sterba * Wait for write completion of superblocks done by write_dev_supers, 3521abbb3b8eSDavid Sterba * @max_mirrors same for write and wait phases. 3522abbb3b8eSDavid Sterba * 3523abbb3b8eSDavid Sterba * Return number of errors when buffer head is not found or not marked up to 3524abbb3b8eSDavid Sterba * date. 3525abbb3b8eSDavid Sterba */ 3526abbb3b8eSDavid Sterba static int wait_dev_supers(struct btrfs_device *device, int max_mirrors) 3527abbb3b8eSDavid Sterba { 3528abbb3b8eSDavid Sterba struct buffer_head *bh; 3529abbb3b8eSDavid Sterba int i; 3530abbb3b8eSDavid Sterba int errors = 0; 3531b6a535faSHoward McLauchlan bool primary_failed = false; 3532abbb3b8eSDavid Sterba u64 bytenr; 3533abbb3b8eSDavid Sterba 3534abbb3b8eSDavid Sterba if (max_mirrors == 0) 3535abbb3b8eSDavid Sterba max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3536abbb3b8eSDavid Sterba 3537abbb3b8eSDavid Sterba for (i = 0; i < max_mirrors; i++) { 3538abbb3b8eSDavid Sterba bytenr = btrfs_sb_offset(i); 3539abbb3b8eSDavid Sterba if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3540abbb3b8eSDavid Sterba device->commit_total_bytes) 3541abbb3b8eSDavid Sterba break; 3542abbb3b8eSDavid Sterba 35439f6d2510SDavid Sterba bh = __find_get_block(device->bdev, 35449f6d2510SDavid Sterba bytenr / BTRFS_BDEV_BLOCKSIZE, 3545abbb3b8eSDavid Sterba BTRFS_SUPER_INFO_SIZE); 3546abbb3b8eSDavid Sterba if (!bh) { 3547abbb3b8eSDavid Sterba errors++; 3548b6a535faSHoward McLauchlan if (i == 0) 3549b6a535faSHoward McLauchlan primary_failed = true; 3550abbb3b8eSDavid Sterba continue; 3551abbb3b8eSDavid Sterba } 3552abbb3b8eSDavid Sterba wait_on_buffer(bh); 3553b6a535faSHoward McLauchlan if (!buffer_uptodate(bh)) { 3554abbb3b8eSDavid Sterba errors++; 3555b6a535faSHoward McLauchlan if (i == 0) 3556b6a535faSHoward McLauchlan primary_failed = true; 3557b6a535faSHoward McLauchlan } 3558abbb3b8eSDavid Sterba 3559abbb3b8eSDavid Sterba /* drop our reference */ 3560abbb3b8eSDavid Sterba brelse(bh); 3561abbb3b8eSDavid Sterba 3562abbb3b8eSDavid Sterba /* drop the reference from the writing run */ 3563abbb3b8eSDavid Sterba brelse(bh); 3564abbb3b8eSDavid Sterba } 3565abbb3b8eSDavid Sterba 3566b6a535faSHoward McLauchlan /* log error, force error return */ 3567b6a535faSHoward McLauchlan if (primary_failed) { 3568b6a535faSHoward McLauchlan btrfs_err(device->fs_info, "error writing primary super block to device %llu", 3569b6a535faSHoward McLauchlan device->devid); 3570b6a535faSHoward McLauchlan return -1; 3571b6a535faSHoward McLauchlan } 3572b6a535faSHoward McLauchlan 3573abbb3b8eSDavid Sterba return errors < i ? 0 : -1; 3574abbb3b8eSDavid Sterba } 3575abbb3b8eSDavid Sterba 3576abbb3b8eSDavid Sterba /* 3577387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3578387125fcSChris Mason * for the barrier when it is done 3579387125fcSChris Mason */ 35804246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3581387125fcSChris Mason { 3582387125fcSChris Mason complete(bio->bi_private); 3583387125fcSChris Mason } 3584387125fcSChris Mason 3585387125fcSChris Mason /* 35864fc6441aSAnand Jain * Submit a flush request to the device if it supports it. Error handling is 35874fc6441aSAnand Jain * done in the waiting counterpart. 3588387125fcSChris Mason */ 35894fc6441aSAnand Jain static void write_dev_flush(struct btrfs_device *device) 3590387125fcSChris Mason { 3591c2a9c7abSAnand Jain struct request_queue *q = bdev_get_queue(device->bdev); 3592e0ae9994SDavid Sterba struct bio *bio = device->flush_bio; 3593387125fcSChris Mason 3594c2a9c7abSAnand Jain if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) 35954fc6441aSAnand Jain return; 3596387125fcSChris Mason 3597e0ae9994SDavid Sterba bio_reset(bio); 3598387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 359974d46992SChristoph Hellwig bio_set_dev(bio, device->bdev); 36008d910125SJan Kara bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH; 3601387125fcSChris Mason init_completion(&device->flush_wait); 3602387125fcSChris Mason bio->bi_private = &device->flush_wait; 3603387125fcSChris Mason 360443a01111SLu Fengqi btrfsic_submit_bio(bio); 36051c3063b6SAnand Jain set_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 36064fc6441aSAnand Jain } 3607387125fcSChris Mason 36084fc6441aSAnand Jain /* 36094fc6441aSAnand Jain * If the flush bio has been submitted by write_dev_flush, wait for it. 36104fc6441aSAnand Jain */ 36118c27cb35SLinus Torvalds static blk_status_t wait_dev_flush(struct btrfs_device *device) 36124fc6441aSAnand Jain { 36134fc6441aSAnand Jain struct bio *bio = device->flush_bio; 36144fc6441aSAnand Jain 36151c3063b6SAnand Jain if (!test_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state)) 361658efbc9fSOmar Sandoval return BLK_STS_OK; 36174fc6441aSAnand Jain 36181c3063b6SAnand Jain clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 36192980d574SDavid Sterba wait_for_completion_io(&device->flush_wait); 36204fc6441aSAnand Jain 36218c27cb35SLinus Torvalds return bio->bi_status; 3622387125fcSChris Mason } 3623387125fcSChris Mason 3624d10b82feSQu Wenruo static int check_barrier_error(struct btrfs_fs_info *fs_info) 3625401b41e5SAnand Jain { 36266528b99dSAnand Jain if (!btrfs_check_rw_degradable(fs_info, NULL)) 3627401b41e5SAnand Jain return -EIO; 3628387125fcSChris Mason return 0; 3629387125fcSChris Mason } 3630387125fcSChris Mason 3631387125fcSChris Mason /* 3632387125fcSChris Mason * send an empty flush down to each device in parallel, 3633387125fcSChris Mason * then wait for them 3634387125fcSChris Mason */ 3635387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3636387125fcSChris Mason { 3637387125fcSChris Mason struct list_head *head; 3638387125fcSChris Mason struct btrfs_device *dev; 36395af3e8ccSStefan Behrens int errors_wait = 0; 36404e4cbee9SChristoph Hellwig blk_status_t ret; 3641387125fcSChris Mason 36421538e6c5SDavid Sterba lockdep_assert_held(&info->fs_devices->device_list_mutex); 3643387125fcSChris Mason /* send down all the barriers */ 3644387125fcSChris Mason head = &info->fs_devices->devices; 36451538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3646e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3647f88ba6a2SHidetoshi Seto continue; 3648cea7c8bfSAnand Jain if (!dev->bdev) 3649387125fcSChris Mason continue; 3650e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3651ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3652387125fcSChris Mason continue; 3653387125fcSChris Mason 36544fc6441aSAnand Jain write_dev_flush(dev); 365558efbc9fSOmar Sandoval dev->last_flush_error = BLK_STS_OK; 3656387125fcSChris Mason } 3657387125fcSChris Mason 3658387125fcSChris Mason /* wait for all the barriers */ 36591538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3660e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3661f88ba6a2SHidetoshi Seto continue; 3662387125fcSChris Mason if (!dev->bdev) { 36635af3e8ccSStefan Behrens errors_wait++; 3664387125fcSChris Mason continue; 3665387125fcSChris Mason } 3666e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3667ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3668387125fcSChris Mason continue; 3669387125fcSChris Mason 36704fc6441aSAnand Jain ret = wait_dev_flush(dev); 3671401b41e5SAnand Jain if (ret) { 3672401b41e5SAnand Jain dev->last_flush_error = ret; 367366b4993eSDavid Sterba btrfs_dev_stat_inc_and_print(dev, 367466b4993eSDavid Sterba BTRFS_DEV_STAT_FLUSH_ERRS); 36755af3e8ccSStefan Behrens errors_wait++; 3676387125fcSChris Mason } 3677401b41e5SAnand Jain } 3678401b41e5SAnand Jain 3679cea7c8bfSAnand Jain if (errors_wait) { 3680401b41e5SAnand Jain /* 3681401b41e5SAnand Jain * At some point we need the status of all disks 3682401b41e5SAnand Jain * to arrive at the volume status. So error checking 3683401b41e5SAnand Jain * is being pushed to a separate loop. 3684401b41e5SAnand Jain */ 3685d10b82feSQu Wenruo return check_barrier_error(info); 3686401b41e5SAnand Jain } 3687387125fcSChris Mason return 0; 3688387125fcSChris Mason } 3689387125fcSChris Mason 3690943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3691943c6e99SZhao Lei { 36928789f4feSZhao Lei int raid_type; 36938789f4feSZhao Lei int min_tolerated = INT_MAX; 3694943c6e99SZhao Lei 36958789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 36968789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 36978c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 36988789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 36998789f4feSZhao Lei tolerated_failures); 3700943c6e99SZhao Lei 37018789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 37028789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 37038789f4feSZhao Lei continue; 370441a6e891SAnand Jain if (!(flags & btrfs_raid_array[raid_type].bg_flag)) 37058789f4feSZhao Lei continue; 37068c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 37078789f4feSZhao Lei btrfs_raid_array[raid_type]. 37088789f4feSZhao Lei tolerated_failures); 37098789f4feSZhao Lei } 3710943c6e99SZhao Lei 37118789f4feSZhao Lei if (min_tolerated == INT_MAX) { 3712ab8d0fc4SJeff Mahoney pr_warn("BTRFS: unknown raid flag: %llu", flags); 37138789f4feSZhao Lei min_tolerated = 0; 37148789f4feSZhao Lei } 37158789f4feSZhao Lei 37168789f4feSZhao Lei return min_tolerated; 3717943c6e99SZhao Lei } 3718943c6e99SZhao Lei 3719eece6a9cSDavid Sterba int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) 3720f2984462SChris Mason { 3721e5e9a520SChris Mason struct list_head *head; 3722f2984462SChris Mason struct btrfs_device *dev; 3723a061fc8dSChris Mason struct btrfs_super_block *sb; 3724f2984462SChris Mason struct btrfs_dev_item *dev_item; 3725f2984462SChris Mason int ret; 3726f2984462SChris Mason int do_barriers; 3727a236aed1SChris Mason int max_errors; 3728a236aed1SChris Mason int total_errors = 0; 3729a061fc8dSChris Mason u64 flags; 3730f2984462SChris Mason 37310b246afaSJeff Mahoney do_barriers = !btrfs_test_opt(fs_info, NOBARRIER); 3732fed3b381SLiu Bo 3733fed3b381SLiu Bo /* 3734fed3b381SLiu Bo * max_mirrors == 0 indicates we're from commit_transaction, 3735fed3b381SLiu Bo * not from fsync where the tree roots in fs_info have not 3736fed3b381SLiu Bo * been consistent on disk. 3737fed3b381SLiu Bo */ 3738fed3b381SLiu Bo if (max_mirrors == 0) 37390b246afaSJeff Mahoney backup_super_roots(fs_info); 3740f2984462SChris Mason 37410b246afaSJeff Mahoney sb = fs_info->super_for_commit; 3742a061fc8dSChris Mason dev_item = &sb->dev_item; 3743e5e9a520SChris Mason 37440b246afaSJeff Mahoney mutex_lock(&fs_info->fs_devices->device_list_mutex); 37450b246afaSJeff Mahoney head = &fs_info->fs_devices->devices; 37460b246afaSJeff Mahoney max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1; 3747387125fcSChris Mason 37485af3e8ccSStefan Behrens if (do_barriers) { 37490b246afaSJeff Mahoney ret = barrier_all_devices(fs_info); 37505af3e8ccSStefan Behrens if (ret) { 37515af3e8ccSStefan Behrens mutex_unlock( 37520b246afaSJeff Mahoney &fs_info->fs_devices->device_list_mutex); 37530b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 37545af3e8ccSStefan Behrens "errors while submitting device barriers."); 37555af3e8ccSStefan Behrens return ret; 37565af3e8ccSStefan Behrens } 37575af3e8ccSStefan Behrens } 3758387125fcSChris Mason 37591538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3760dfe25020SChris Mason if (!dev->bdev) { 3761dfe25020SChris Mason total_errors++; 3762dfe25020SChris Mason continue; 3763dfe25020SChris Mason } 3764e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3765ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3766dfe25020SChris Mason continue; 3767dfe25020SChris Mason 37682b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3769a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3770a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 37717df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3772935e5cc9SMiao Xie dev->commit_total_bytes); 3773ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3774ce7213c7SMiao Xie dev->commit_bytes_used); 3775a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3776a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3777a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3778a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 37797239ff4bSNikolay Borisov memcpy(dev_item->fsid, dev->fs_devices->metadata_uuid, 37807239ff4bSNikolay Borisov BTRFS_FSID_SIZE); 3781a512bbf8SYan Zheng 3782a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3783a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3784f2984462SChris Mason 378575cb857dSQu Wenruo ret = btrfs_validate_write_super(fs_info, sb); 378675cb857dSQu Wenruo if (ret < 0) { 378775cb857dSQu Wenruo mutex_unlock(&fs_info->fs_devices->device_list_mutex); 378875cb857dSQu Wenruo btrfs_handle_fs_error(fs_info, -EUCLEAN, 378975cb857dSQu Wenruo "unexpected superblock corruption detected"); 379075cb857dSQu Wenruo return -EUCLEAN; 379175cb857dSQu Wenruo } 379275cb857dSQu Wenruo 3793abbb3b8eSDavid Sterba ret = write_dev_supers(dev, sb, max_mirrors); 3794a236aed1SChris Mason if (ret) 3795a236aed1SChris Mason total_errors++; 3796f2984462SChris Mason } 3797a236aed1SChris Mason if (total_errors > max_errors) { 37980b246afaSJeff Mahoney btrfs_err(fs_info, "%d errors while writing supers", 3799d397712bSChris Mason total_errors); 38000b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 380179787eaaSJeff Mahoney 38029d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 38030b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 38040b246afaSJeff Mahoney "%d errors while writing supers", 38050b246afaSJeff Mahoney total_errors); 38069d565ba4SStefan Behrens return -EIO; 3807a236aed1SChris Mason } 3808f2984462SChris Mason 3809a512bbf8SYan Zheng total_errors = 0; 38101538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3811dfe25020SChris Mason if (!dev->bdev) 3812dfe25020SChris Mason continue; 3813e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3814ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3815dfe25020SChris Mason continue; 3816dfe25020SChris Mason 3817abbb3b8eSDavid Sterba ret = wait_dev_supers(dev, max_mirrors); 3818a512bbf8SYan Zheng if (ret) 38191259ab75SChris Mason total_errors++; 3820f2984462SChris Mason } 38210b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 3822a236aed1SChris Mason if (total_errors > max_errors) { 38230b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 38240b246afaSJeff Mahoney "%d errors while writing supers", 38250b246afaSJeff Mahoney total_errors); 382679787eaaSJeff Mahoney return -EIO; 3827a236aed1SChris Mason } 3828f2984462SChris Mason return 0; 3829f2984462SChris Mason } 3830f2984462SChris Mason 3831cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3832cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3833cb517eabSMiao Xie struct btrfs_root *root) 38342619ba1fSChris Mason { 38354df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 38362619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 38372619ba1fSChris Mason (unsigned long)root->root_key.objectid); 38384df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 383976dda93cSYan, Zheng 384076dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 384176dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 384276dda93cSYan, Zheng 38431c1ea4f7SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 38443321719eSLiu Bo btrfs_free_log(NULL, root); 38451c1ea4f7SLiu Bo if (root->reloc_root) { 38461c1ea4f7SLiu Bo free_extent_buffer(root->reloc_root->node); 38471c1ea4f7SLiu Bo free_extent_buffer(root->reloc_root->commit_root); 38481c1ea4f7SLiu Bo btrfs_put_fs_root(root->reloc_root); 38491c1ea4f7SLiu Bo root->reloc_root = NULL; 38501c1ea4f7SLiu Bo } 38511c1ea4f7SLiu Bo } 38523321719eSLiu Bo 3853faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3854581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3855faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3856581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 385784db5ccfSDavid Sterba btrfs_free_fs_root(root); 38584df27c4dSYan, Zheng } 38594df27c4dSYan, Zheng 386084db5ccfSDavid Sterba void btrfs_free_fs_root(struct btrfs_root *root) 38614df27c4dSYan, Zheng { 386257cdc8dbSDavid Sterba iput(root->ino_cache_inode); 38634df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 38640ee5dc67SAl Viro if (root->anon_dev) 38650ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 38668257b2dcSMiao Xie if (root->subv_writers) 38678257b2dcSMiao Xie btrfs_free_subvolume_writers(root->subv_writers); 38685f39d397SChris Mason free_extent_buffer(root->node); 38695f39d397SChris Mason free_extent_buffer(root->commit_root); 3870581bb050SLi Zefan kfree(root->free_ino_ctl); 3871581bb050SLi Zefan kfree(root->free_ino_pinned); 3872b0feb9d9SMiao Xie btrfs_put_fs_root(root); 38732619ba1fSChris Mason } 38742619ba1fSChris Mason 3875c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3876c146afadSYan Zheng { 3877c146afadSYan Zheng u64 root_objectid = 0; 3878c146afadSYan Zheng struct btrfs_root *gang[8]; 387965d33fd7SQu Wenruo int i = 0; 388065d33fd7SQu Wenruo int err = 0; 388165d33fd7SQu Wenruo unsigned int ret = 0; 388265d33fd7SQu Wenruo int index; 3883c146afadSYan Zheng 3884c146afadSYan Zheng while (1) { 388565d33fd7SQu Wenruo index = srcu_read_lock(&fs_info->subvol_srcu); 3886c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3887c146afadSYan Zheng (void **)gang, root_objectid, 3888c146afadSYan Zheng ARRAY_SIZE(gang)); 388965d33fd7SQu Wenruo if (!ret) { 389065d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 3891c146afadSYan Zheng break; 389265d33fd7SQu Wenruo } 38935d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 389466b4ffd1SJosef Bacik 389565d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 389665d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 389765d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 389865d33fd7SQu Wenruo gang[i] = NULL; 389965d33fd7SQu Wenruo continue; 390065d33fd7SQu Wenruo } 390165d33fd7SQu Wenruo /* grab all the search result for later use */ 390265d33fd7SQu Wenruo gang[i] = btrfs_grab_fs_root(gang[i]); 390365d33fd7SQu Wenruo } 390465d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 390565d33fd7SQu Wenruo 390665d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 390765d33fd7SQu Wenruo if (!gang[i]) 390865d33fd7SQu Wenruo continue; 3909c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 391066b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 391166b4ffd1SJosef Bacik if (err) 391265d33fd7SQu Wenruo break; 391365d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 3914c146afadSYan Zheng } 3915c146afadSYan Zheng root_objectid++; 3916c146afadSYan Zheng } 391765d33fd7SQu Wenruo 391865d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 391965d33fd7SQu Wenruo for (; i < ret; i++) { 392065d33fd7SQu Wenruo if (gang[i]) 392165d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 392265d33fd7SQu Wenruo } 392365d33fd7SQu Wenruo return err; 3924c146afadSYan Zheng } 3925c146afadSYan Zheng 39266bccf3abSJeff Mahoney int btrfs_commit_super(struct btrfs_fs_info *fs_info) 3927c146afadSYan Zheng { 39286bccf3abSJeff Mahoney struct btrfs_root *root = fs_info->tree_root; 3929c146afadSYan Zheng struct btrfs_trans_handle *trans; 3930c146afadSYan Zheng 39310b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 39322ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 39330b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 39340b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 3935c71bf099SYan, Zheng 3936c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 39370b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 39380b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 3939c71bf099SYan, Zheng 39407a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 39413612b495STsutomu Itoh if (IS_ERR(trans)) 39423612b495STsutomu Itoh return PTR_ERR(trans); 39433a45bb20SJeff Mahoney return btrfs_commit_transaction(trans); 3944c146afadSYan Zheng } 3945c146afadSYan Zheng 3946b105e927SDavid Sterba void __cold close_ctree(struct btrfs_fs_info *fs_info) 3947eb60ceacSChris Mason { 3948c146afadSYan Zheng int ret; 3949e089f05cSChris Mason 3950afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); 3951d6fd0ae2SOmar Sandoval /* 3952d6fd0ae2SOmar Sandoval * We don't want the cleaner to start new transactions, add more delayed 3953d6fd0ae2SOmar Sandoval * iputs, etc. while we're closing. We can't use kthread_stop() yet 3954d6fd0ae2SOmar Sandoval * because that frees the task_struct, and the transaction kthread might 3955d6fd0ae2SOmar Sandoval * still try to wake up the cleaner. 3956d6fd0ae2SOmar Sandoval */ 3957d6fd0ae2SOmar Sandoval kthread_park(fs_info->cleaner_kthread); 3958a2135011SChris Mason 39597343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 3960d06f23d6SJeff Mahoney btrfs_qgroup_wait_for_completion(fs_info, false); 39617343dd61SJustin Maggard 3962803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 3963803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 3964803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 3965803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 3966803b2f54SStefan Behrens 3967837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3968aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3969837d5b6eSIlya Dryomov 39708dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 39718dabb742SStefan Behrens 3972aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 39734cb5300bSChris Mason 39744cb5300bSChris Mason /* wait for any defraggers to finish */ 39754cb5300bSChris Mason wait_event(fs_info->transaction_wait, 39764cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 39774cb5300bSChris Mason 39784cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 397926176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 39804cb5300bSChris Mason 398121c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 398221c7e756SMiao Xie 3983b0643e59SDennis Zhou /* Cancel or finish ongoing discard work */ 3984b0643e59SDennis Zhou btrfs_discard_cleanup(fs_info); 3985b0643e59SDennis Zhou 3986bc98a42cSDavid Howells if (!sb_rdonly(fs_info->sb)) { 3987e44163e1SJeff Mahoney /* 3988d6fd0ae2SOmar Sandoval * The cleaner kthread is stopped, so do one final pass over 3989d6fd0ae2SOmar Sandoval * unused block groups. 3990e44163e1SJeff Mahoney */ 39910b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 3992e44163e1SJeff Mahoney 39936bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 3994d397712bSChris Mason if (ret) 399504892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 3996c146afadSYan Zheng } 3997ed2ff2cbSChris Mason 3998af722733SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state) || 3999af722733SLiu Bo test_bit(BTRFS_FS_STATE_TRANS_ABORTED, &fs_info->fs_state)) 40002ff7e61eSJeff Mahoney btrfs_error_commit_super(fs_info); 4001acce952bSliubo 4002e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 4003e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 40048929ecfaSYan, Zheng 4005e187831eSJosef Bacik ASSERT(list_empty(&fs_info->delayed_iputs)); 4006afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); 4007f25784b3SYan Zheng 400804892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 4009fe816d0fSNikolay Borisov ASSERT(list_empty(&fs_info->delalloc_roots)); 4010bcef60f2SArne Jansen 4011963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 401204892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 4013963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 4014b0c68f8bSChris Mason } 401531153d81SYan Zheng 40164297ff84SJosef Bacik if (percpu_counter_sum(&fs_info->dio_bytes)) 40174297ff84SJosef Bacik btrfs_info(fs_info, "at unmount dio bytes count %lld", 40184297ff84SJosef Bacik percpu_counter_sum(&fs_info->dio_bytes)); 40194297ff84SJosef Bacik 40206618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 4021b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 40225ac1d209SJeff Mahoney 4023faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 4024d10c5f31SChris Mason 40251a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 40261a4319ccSLiu Bo 4027de348ee0SWang Shilong /* 4028de348ee0SWang Shilong * we must make sure there is not any read request to 4029de348ee0SWang Shilong * submit after we stopping all workers. 4030de348ee0SWang Shilong */ 4031de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 403296192499SJosef Bacik btrfs_stop_all_workers(fs_info); 403396192499SJosef Bacik 4034afcdd129SJosef Bacik clear_bit(BTRFS_FS_OPEN, &fs_info->flags); 40354273eaffSAnand Jain free_root_pointers(fs_info, true); 40369ad6b7bcSChris Mason 40374e19443dSJosef Bacik /* 40384e19443dSJosef Bacik * We must free the block groups after dropping the fs_roots as we could 40394e19443dSJosef Bacik * have had an IO error and have left over tree log blocks that aren't 40404e19443dSJosef Bacik * cleaned up until the fs roots are freed. This makes the block group 40414e19443dSJosef Bacik * accounting appear to be wrong because there's pending reserved bytes, 40424e19443dSJosef Bacik * so make sure we do the block group cleanup afterwards. 40434e19443dSJosef Bacik */ 40444e19443dSJosef Bacik btrfs_free_block_groups(fs_info); 40454e19443dSJosef Bacik 404613e6c37bSJosef Bacik iput(fs_info->btree_inode); 4047d6bfde87SChris Mason 404821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 40490b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) 40502ff7e61eSJeff Mahoney btrfsic_unmount(fs_info->fs_devices); 405121adbd5cSStefan Behrens #endif 405221adbd5cSStefan Behrens 40530b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 405468c94e55SNikolay Borisov btrfs_close_devices(fs_info->fs_devices); 4055b248a415SChris Mason 4056e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 4057963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 40584297ff84SJosef Bacik percpu_counter_destroy(&fs_info->dio_bytes); 40597f8d236aSDavid Sterba percpu_counter_destroy(&fs_info->dev_replace.bio_counter); 406076dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 40610b86a832SChris Mason 4062bfcea1c6SJohannes Thumshirn btrfs_free_csum_hash(fs_info); 406353b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 4064fd708b81SJosef Bacik btrfs_free_ref_cache(fs_info); 4065eb60ceacSChris Mason } 4066eb60ceacSChris Mason 4067b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 4068b9fab919SChris Mason int atomic) 4069ccd467d6SChris Mason { 40701259ab75SChris Mason int ret; 4071727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 40721259ab75SChris Mason 40730b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 40741259ab75SChris Mason if (!ret) 40751259ab75SChris Mason return ret; 40761259ab75SChris Mason 40771259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 4078b9fab919SChris Mason parent_transid, atomic); 4079b9fab919SChris Mason if (ret == -EAGAIN) 4080b9fab919SChris Mason return ret; 40811259ab75SChris Mason return !ret; 40825f39d397SChris Mason } 40836702ed49SChris Mason 40845f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 40855f39d397SChris Mason { 40860b246afaSJeff Mahoney struct btrfs_fs_info *fs_info; 408706ea65a3SJosef Bacik struct btrfs_root *root; 40885f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 4089b9473439SChris Mason int was_dirty; 4090b4ce94deSChris Mason 409106ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 409206ea65a3SJosef Bacik /* 409306ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 409452042d8eSAndrea Gelmini * enabled. Normal people shouldn't be using unmapped buffers as dirty 409506ea65a3SJosef Bacik * outside of the sanity tests. 409606ea65a3SJosef Bacik */ 4097b0132a3bSNikolay Borisov if (unlikely(test_bit(EXTENT_BUFFER_UNMAPPED, &buf->bflags))) 409806ea65a3SJosef Bacik return; 409906ea65a3SJosef Bacik #endif 410006ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 41010b246afaSJeff Mahoney fs_info = root->fs_info; 4102b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 41030b246afaSJeff Mahoney if (transid != fs_info->generation) 41045d163e0eSJeff Mahoney WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", 41050b246afaSJeff Mahoney buf->start, transid, fs_info->generation); 41060b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 4107e2d84521SMiao Xie if (!was_dirty) 4108104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 4109e2d84521SMiao Xie buf->len, 41100b246afaSJeff Mahoney fs_info->dirty_metadata_batch); 41111f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 411269fc6cbbSQu Wenruo /* 411369fc6cbbSQu Wenruo * Since btrfs_mark_buffer_dirty() can be called with item pointer set 411469fc6cbbSQu Wenruo * but item data not updated. 411569fc6cbbSQu Wenruo * So here we should only check item pointers, not item data. 411669fc6cbbSQu Wenruo */ 411769fc6cbbSQu Wenruo if (btrfs_header_level(buf) == 0 && 4118cfdaad5eSDavid Sterba btrfs_check_leaf_relaxed(buf)) { 4119a4f78750SDavid Sterba btrfs_print_leaf(buf); 41201f21ef0aSFilipe Manana ASSERT(0); 41211f21ef0aSFilipe Manana } 41221f21ef0aSFilipe Manana #endif 4123eb60ceacSChris Mason } 4124eb60ceacSChris Mason 41252ff7e61eSJeff Mahoney static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info, 4126b53d3f5dSLiu Bo int flush_delayed) 412735b7e476SChris Mason { 4128188de649SChris Mason /* 4129188de649SChris Mason * looks as though older kernels can get into trouble with 4130188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4131188de649SChris Mason */ 4132e2d84521SMiao Xie int ret; 4133d6bfde87SChris Mason 41346933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4135d6bfde87SChris Mason return; 4136d6bfde87SChris Mason 4137b53d3f5dSLiu Bo if (flush_delayed) 41382ff7e61eSJeff Mahoney btrfs_balance_delayed_items(fs_info); 413916cdcec7SMiao Xie 4140d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 4141d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 4142d814a491SEthan Lien fs_info->dirty_metadata_batch); 4143e2d84521SMiao Xie if (ret > 0) { 41440b246afaSJeff Mahoney balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping); 414516cdcec7SMiao Xie } 414616cdcec7SMiao Xie } 414716cdcec7SMiao Xie 41482ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info) 414916cdcec7SMiao Xie { 41502ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 1); 415135b7e476SChris Mason } 4152b53d3f5dSLiu Bo 41532ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info) 4154b53d3f5dSLiu Bo { 41552ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 0); 4156d6bfde87SChris Mason } 41576b80053dSChris Mason 4158581c1760SQu Wenruo int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, 4159581c1760SQu Wenruo struct btrfs_key *first_key) 41606b80053dSChris Mason { 41615ab12d1fSDavid Sterba return btree_read_extent_buffer_pages(buf, parent_transid, 4162581c1760SQu Wenruo level, first_key); 41636b80053dSChris Mason } 41640da5468fSChris Mason 41652ff7e61eSJeff Mahoney static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info) 4166acce952bSliubo { 4167fe816d0fSNikolay Borisov /* cleanup FS via transaction */ 4168fe816d0fSNikolay Borisov btrfs_cleanup_transaction(fs_info); 4169fe816d0fSNikolay Borisov 41700b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 41712ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 41720b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 4173acce952bSliubo 41740b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 41750b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 4176acce952bSliubo } 4177acce952bSliubo 4178143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4179acce952bSliubo { 4180acce952bSliubo struct btrfs_ordered_extent *ordered; 4181acce952bSliubo 4182199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4183779880efSJosef Bacik /* 4184779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4185779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4186779880efSJosef Bacik */ 4187199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4188779880efSJosef Bacik root_extent_list) 4189779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4190199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4191199c2a9cSMiao Xie } 4192199c2a9cSMiao Xie 4193199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4194199c2a9cSMiao Xie { 4195199c2a9cSMiao Xie struct btrfs_root *root; 4196199c2a9cSMiao Xie struct list_head splice; 4197199c2a9cSMiao Xie 4198199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4199199c2a9cSMiao Xie 4200199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4201199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4202199c2a9cSMiao Xie while (!list_empty(&splice)) { 4203199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4204199c2a9cSMiao Xie ordered_root); 42051de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 42061de2cfdeSJosef Bacik &fs_info->ordered_roots); 4207199c2a9cSMiao Xie 42082a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4209199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4210199c2a9cSMiao Xie 42112a85d9caSLiu Bo cond_resched(); 42122a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4213199c2a9cSMiao Xie } 4214199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 421574d5d229SJosef Bacik 421674d5d229SJosef Bacik /* 421774d5d229SJosef Bacik * We need this here because if we've been flipped read-only we won't 421874d5d229SJosef Bacik * get sync() from the umount, so we need to make sure any ordered 421974d5d229SJosef Bacik * extents that haven't had their dirty pages IO start writeout yet 422074d5d229SJosef Bacik * actually get run and error out properly. 422174d5d229SJosef Bacik */ 422274d5d229SJosef Bacik btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1); 4223acce952bSliubo } 4224acce952bSliubo 422535a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 42262ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4227acce952bSliubo { 4228acce952bSliubo struct rb_node *node; 4229acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4230acce952bSliubo struct btrfs_delayed_ref_node *ref; 4231acce952bSliubo int ret = 0; 4232acce952bSliubo 4233acce952bSliubo delayed_refs = &trans->delayed_refs; 4234acce952bSliubo 4235acce952bSliubo spin_lock(&delayed_refs->lock); 4236d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4237cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 42380b246afaSJeff Mahoney btrfs_info(fs_info, "delayed_refs has NO entry"); 4239acce952bSliubo return ret; 4240acce952bSliubo } 4241acce952bSliubo 42425c9d028bSLiu Bo while ((node = rb_first_cached(&delayed_refs->href_root)) != NULL) { 4243d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 42440e0adbcfSJosef Bacik struct rb_node *n; 4245e78417d1SJosef Bacik bool pin_bytes = false; 4246acce952bSliubo 4247d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4248d7df2c79SJosef Bacik href_node); 42493069bd26SJosef Bacik if (btrfs_delayed_ref_lock(delayed_refs, head)) 4250b939d1abSJosef Bacik continue; 42513069bd26SJosef Bacik 4252d7df2c79SJosef Bacik spin_lock(&head->lock); 4253e3d03965SLiu Bo while ((n = rb_first_cached(&head->ref_tree)) != NULL) { 42540e0adbcfSJosef Bacik ref = rb_entry(n, struct btrfs_delayed_ref_node, 42550e0adbcfSJosef Bacik ref_node); 4256d7df2c79SJosef Bacik ref->in_tree = 0; 4257e3d03965SLiu Bo rb_erase_cached(&ref->ref_node, &head->ref_tree); 42580e0adbcfSJosef Bacik RB_CLEAR_NODE(&ref->ref_node); 42591d57ee94SWang Xiaoguang if (!list_empty(&ref->add_list)) 42601d57ee94SWang Xiaoguang list_del(&ref->add_list); 4261d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4262d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4263d7df2c79SJosef Bacik } 426454067ae9SJosef Bacik if (head->must_insert_reserved) 4265e78417d1SJosef Bacik pin_bytes = true; 426678a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4267fa781ceaSJosef Bacik btrfs_delete_ref_head(delayed_refs, head); 4268d7df2c79SJosef Bacik spin_unlock(&head->lock); 4269acce952bSliubo spin_unlock(&delayed_refs->lock); 4270e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4271acce952bSliubo 4272d7df2c79SJosef Bacik if (pin_bytes) 4273d278850eSJosef Bacik btrfs_pin_extent(fs_info, head->bytenr, 4274d278850eSJosef Bacik head->num_bytes, 1); 427531890da0SJosef Bacik btrfs_cleanup_ref_head_accounting(fs_info, delayed_refs, head); 4276d278850eSJosef Bacik btrfs_put_delayed_ref_head(head); 4277acce952bSliubo cond_resched(); 4278acce952bSliubo spin_lock(&delayed_refs->lock); 4279acce952bSliubo } 428081f7eb00SJeff Mahoney btrfs_qgroup_destroy_extent_records(trans); 4281acce952bSliubo 4282acce952bSliubo spin_unlock(&delayed_refs->lock); 4283acce952bSliubo 4284acce952bSliubo return ret; 4285acce952bSliubo } 4286acce952bSliubo 4287143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4288acce952bSliubo { 4289acce952bSliubo struct btrfs_inode *btrfs_inode; 4290acce952bSliubo struct list_head splice; 4291acce952bSliubo 4292acce952bSliubo INIT_LIST_HEAD(&splice); 4293acce952bSliubo 4294eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4295eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4296acce952bSliubo 4297acce952bSliubo while (!list_empty(&splice)) { 4298fe816d0fSNikolay Borisov struct inode *inode = NULL; 4299eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4300acce952bSliubo delalloc_inodes); 4301fe816d0fSNikolay Borisov __btrfs_del_delalloc_inode(root, btrfs_inode); 4302eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4303acce952bSliubo 4304fe816d0fSNikolay Borisov /* 4305fe816d0fSNikolay Borisov * Make sure we get a live inode and that it'll not disappear 4306fe816d0fSNikolay Borisov * meanwhile. 4307fe816d0fSNikolay Borisov */ 4308fe816d0fSNikolay Borisov inode = igrab(&btrfs_inode->vfs_inode); 4309fe816d0fSNikolay Borisov if (inode) { 4310fe816d0fSNikolay Borisov invalidate_inode_pages2(inode->i_mapping); 4311fe816d0fSNikolay Borisov iput(inode); 4312fe816d0fSNikolay Borisov } 4313eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4314acce952bSliubo } 4315eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4316eb73c1b7SMiao Xie } 4317eb73c1b7SMiao Xie 4318eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4319eb73c1b7SMiao Xie { 4320eb73c1b7SMiao Xie struct btrfs_root *root; 4321eb73c1b7SMiao Xie struct list_head splice; 4322eb73c1b7SMiao Xie 4323eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4324eb73c1b7SMiao Xie 4325eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4326eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4327eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4328eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4329eb73c1b7SMiao Xie delalloc_root); 4330eb73c1b7SMiao Xie root = btrfs_grab_fs_root(root); 4331eb73c1b7SMiao Xie BUG_ON(!root); 4332eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4333eb73c1b7SMiao Xie 4334eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 4335eb73c1b7SMiao Xie btrfs_put_fs_root(root); 4336eb73c1b7SMiao Xie 4337eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4338eb73c1b7SMiao Xie } 4339eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4340acce952bSliubo } 4341acce952bSliubo 43422ff7e61eSJeff Mahoney static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, 4343acce952bSliubo struct extent_io_tree *dirty_pages, 4344acce952bSliubo int mark) 4345acce952bSliubo { 4346acce952bSliubo int ret; 4347acce952bSliubo struct extent_buffer *eb; 4348acce952bSliubo u64 start = 0; 4349acce952bSliubo u64 end; 4350acce952bSliubo 4351acce952bSliubo while (1) { 4352acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4353e6138876SJosef Bacik mark, NULL); 4354acce952bSliubo if (ret) 4355acce952bSliubo break; 4356acce952bSliubo 435791166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4358acce952bSliubo while (start <= end) { 43590b246afaSJeff Mahoney eb = find_extent_buffer(fs_info, start); 43600b246afaSJeff Mahoney start += fs_info->nodesize; 4361fd8b2b61SJosef Bacik if (!eb) 4362acce952bSliubo continue; 4363fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4364acce952bSliubo 4365fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4366fd8b2b61SJosef Bacik &eb->bflags)) 4367fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4368fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4369acce952bSliubo } 4370acce952bSliubo } 4371acce952bSliubo 4372acce952bSliubo return ret; 4373acce952bSliubo } 4374acce952bSliubo 43752ff7e61eSJeff Mahoney static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, 4376acce952bSliubo struct extent_io_tree *pinned_extents) 4377acce952bSliubo { 4378acce952bSliubo struct extent_io_tree *unpin; 4379acce952bSliubo u64 start; 4380acce952bSliubo u64 end; 4381acce952bSliubo int ret; 4382ed0eaa14SLiu Bo bool loop = true; 4383acce952bSliubo 4384acce952bSliubo unpin = pinned_extents; 4385ed0eaa14SLiu Bo again: 4386acce952bSliubo while (1) { 43870e6ec385SFilipe Manana struct extent_state *cached_state = NULL; 43880e6ec385SFilipe Manana 4389fcd5e742SLu Fengqi /* 4390fcd5e742SLu Fengqi * The btrfs_finish_extent_commit() may get the same range as 4391fcd5e742SLu Fengqi * ours between find_first_extent_bit and clear_extent_dirty. 4392fcd5e742SLu Fengqi * Hence, hold the unused_bg_unpin_mutex to avoid double unpin 4393fcd5e742SLu Fengqi * the same extent range. 4394fcd5e742SLu Fengqi */ 4395fcd5e742SLu Fengqi mutex_lock(&fs_info->unused_bg_unpin_mutex); 4396acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 43970e6ec385SFilipe Manana EXTENT_DIRTY, &cached_state); 4398fcd5e742SLu Fengqi if (ret) { 4399fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4400acce952bSliubo break; 4401fcd5e742SLu Fengqi } 4402acce952bSliubo 44030e6ec385SFilipe Manana clear_extent_dirty(unpin, start, end, &cached_state); 44040e6ec385SFilipe Manana free_extent_state(cached_state); 44052ff7e61eSJeff Mahoney btrfs_error_unpin_extent_range(fs_info, start, end); 4406fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4407acce952bSliubo cond_resched(); 4408acce952bSliubo } 4409acce952bSliubo 4410ed0eaa14SLiu Bo if (loop) { 44110b246afaSJeff Mahoney if (unpin == &fs_info->freed_extents[0]) 44120b246afaSJeff Mahoney unpin = &fs_info->freed_extents[1]; 4413ed0eaa14SLiu Bo else 44140b246afaSJeff Mahoney unpin = &fs_info->freed_extents[0]; 4415ed0eaa14SLiu Bo loop = false; 4416ed0eaa14SLiu Bo goto again; 4417ed0eaa14SLiu Bo } 4418ed0eaa14SLiu Bo 4419acce952bSliubo return 0; 4420acce952bSliubo } 4421acce952bSliubo 442232da5386SDavid Sterba static void btrfs_cleanup_bg_io(struct btrfs_block_group *cache) 4423c79a1751SLiu Bo { 4424c79a1751SLiu Bo struct inode *inode; 4425c79a1751SLiu Bo 4426c79a1751SLiu Bo inode = cache->io_ctl.inode; 4427c79a1751SLiu Bo if (inode) { 4428c79a1751SLiu Bo invalidate_inode_pages2(inode->i_mapping); 4429c79a1751SLiu Bo BTRFS_I(inode)->generation = 0; 4430c79a1751SLiu Bo cache->io_ctl.inode = NULL; 4431c79a1751SLiu Bo iput(inode); 4432c79a1751SLiu Bo } 4433c79a1751SLiu Bo btrfs_put_block_group(cache); 4434c79a1751SLiu Bo } 4435c79a1751SLiu Bo 4436c79a1751SLiu Bo void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, 44372ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4438c79a1751SLiu Bo { 443932da5386SDavid Sterba struct btrfs_block_group *cache; 4440c79a1751SLiu Bo 4441c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4442c79a1751SLiu Bo while (!list_empty(&cur_trans->dirty_bgs)) { 4443c79a1751SLiu Bo cache = list_first_entry(&cur_trans->dirty_bgs, 444432da5386SDavid Sterba struct btrfs_block_group, 4445c79a1751SLiu Bo dirty_list); 4446c79a1751SLiu Bo 4447c79a1751SLiu Bo if (!list_empty(&cache->io_list)) { 4448c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4449c79a1751SLiu Bo list_del_init(&cache->io_list); 4450c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4451c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4452c79a1751SLiu Bo } 4453c79a1751SLiu Bo 4454c79a1751SLiu Bo list_del_init(&cache->dirty_list); 4455c79a1751SLiu Bo spin_lock(&cache->lock); 4456c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4457c79a1751SLiu Bo spin_unlock(&cache->lock); 4458c79a1751SLiu Bo 4459c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4460c79a1751SLiu Bo btrfs_put_block_group(cache); 4461ba2c4d4eSJosef Bacik btrfs_delayed_refs_rsv_release(fs_info, 1); 4462c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4463c79a1751SLiu Bo } 4464c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4465c79a1751SLiu Bo 446645ae2c18SNikolay Borisov /* 446745ae2c18SNikolay Borisov * Refer to the definition of io_bgs member for details why it's safe 446845ae2c18SNikolay Borisov * to use it without any locking 446945ae2c18SNikolay Borisov */ 4470c79a1751SLiu Bo while (!list_empty(&cur_trans->io_bgs)) { 4471c79a1751SLiu Bo cache = list_first_entry(&cur_trans->io_bgs, 447232da5386SDavid Sterba struct btrfs_block_group, 4473c79a1751SLiu Bo io_list); 4474c79a1751SLiu Bo 4475c79a1751SLiu Bo list_del_init(&cache->io_list); 4476c79a1751SLiu Bo spin_lock(&cache->lock); 4477c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4478c79a1751SLiu Bo spin_unlock(&cache->lock); 4479c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4480c79a1751SLiu Bo } 4481c79a1751SLiu Bo } 4482c79a1751SLiu Bo 448349b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 44842ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 448549b25e05SJeff Mahoney { 4486bbbf7243SNikolay Borisov struct btrfs_device *dev, *tmp; 4487bbbf7243SNikolay Borisov 44882ff7e61eSJeff Mahoney btrfs_cleanup_dirty_bgs(cur_trans, fs_info); 4489c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->dirty_bgs)); 4490c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->io_bgs)); 4491c79a1751SLiu Bo 4492bbbf7243SNikolay Borisov list_for_each_entry_safe(dev, tmp, &cur_trans->dev_update_list, 4493bbbf7243SNikolay Borisov post_commit_list) { 4494bbbf7243SNikolay Borisov list_del_init(&dev->post_commit_list); 4495bbbf7243SNikolay Borisov } 4496bbbf7243SNikolay Borisov 44972ff7e61eSJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, fs_info); 449849b25e05SJeff Mahoney 44994a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 45000b246afaSJeff Mahoney wake_up(&fs_info->transaction_blocked_wait); 450149b25e05SJeff Mahoney 45024a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 45030b246afaSJeff Mahoney wake_up(&fs_info->transaction_wait); 450449b25e05SJeff Mahoney 4505ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 4506ccdf9b30SJeff Mahoney btrfs_assert_delayed_root_empty(fs_info); 450767cde344SMiao Xie 45082ff7e61eSJeff Mahoney btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages, 450949b25e05SJeff Mahoney EXTENT_DIRTY); 45102ff7e61eSJeff Mahoney btrfs_destroy_pinned_extent(fs_info, 45110b246afaSJeff Mahoney fs_info->pinned_extents); 451249b25e05SJeff Mahoney 45134a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 45144a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 451549b25e05SJeff Mahoney } 451649b25e05SJeff Mahoney 45172ff7e61eSJeff Mahoney static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info) 4518acce952bSliubo { 4519acce952bSliubo struct btrfs_transaction *t; 4520acce952bSliubo 45210b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 4522acce952bSliubo 45230b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 45240b246afaSJeff Mahoney while (!list_empty(&fs_info->trans_list)) { 45250b246afaSJeff Mahoney t = list_first_entry(&fs_info->trans_list, 4526724e2315SJosef Bacik struct btrfs_transaction, list); 4527724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 45289b64f57dSElena Reshetova refcount_inc(&t->use_count); 45290b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 45302ff7e61eSJeff Mahoney btrfs_wait_for_commit(fs_info, t->transid); 4531724e2315SJosef Bacik btrfs_put_transaction(t); 45320b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4533724e2315SJosef Bacik continue; 4534724e2315SJosef Bacik } 45350b246afaSJeff Mahoney if (t == fs_info->running_transaction) { 4536724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 45370b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4538724e2315SJosef Bacik /* 4539724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4540724e2315SJosef Bacik * handle open currently for this transaction. 4541724e2315SJosef Bacik */ 4542724e2315SJosef Bacik wait_event(t->writer_wait, 4543724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4544724e2315SJosef Bacik } else { 45450b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4546724e2315SJosef Bacik } 45472ff7e61eSJeff Mahoney btrfs_cleanup_one_transaction(t, fs_info); 4548724e2315SJosef Bacik 45490b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 45500b246afaSJeff Mahoney if (t == fs_info->running_transaction) 45510b246afaSJeff Mahoney fs_info->running_transaction = NULL; 4552724e2315SJosef Bacik list_del_init(&t->list); 45530b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4554a4abeea4SJosef Bacik 4555724e2315SJosef Bacik btrfs_put_transaction(t); 45562ff7e61eSJeff Mahoney trace_btrfs_transaction_commit(fs_info->tree_root); 45570b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4558724e2315SJosef Bacik } 45590b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 45600b246afaSJeff Mahoney btrfs_destroy_all_ordered_extents(fs_info); 4561ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 4562ccdf9b30SJeff Mahoney btrfs_assert_delayed_root_empty(fs_info); 45632ff7e61eSJeff Mahoney btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents); 45640b246afaSJeff Mahoney btrfs_destroy_all_delalloc_inodes(fs_info); 45650b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 4566acce952bSliubo 4567acce952bSliubo return 0; 4568acce952bSliubo } 4569acce952bSliubo 4570e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 45714d53dddbSDavid Sterba /* mandatory callbacks */ 45720b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 45734d53dddbSDavid Sterba .readpage_end_io_hook = btree_readpage_end_io_hook, 45740da5468fSChris Mason }; 4575