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> 10ce9adaa5SChris Mason #include <linux/workqueue.h> 11a74a4b97SChris Mason #include <linux/kthread.h> 125a0e3ad6STejun Heo #include <linux/slab.h> 13784b4e29SChris Mason #include <linux/migrate.h> 147a36ddecSDavid Sterba #include <linux/ratelimit.h> 156463fe58SStefan Behrens #include <linux/uuid.h> 16803b2f54SStefan Behrens #include <linux/semaphore.h> 17540adea3SMasami Hiramatsu #include <linux/error-injection.h> 189678c543SNikolay Borisov #include <linux/crc32c.h> 19b89f6d1fSFilipe Manana #include <linux/sched/mm.h> 207e75bf3fSDavid Sterba #include <asm/unaligned.h> 216d97c6e3SJohannes Thumshirn #include <crypto/hash.h> 22eb60ceacSChris Mason #include "ctree.h" 23eb60ceacSChris Mason #include "disk-io.h" 24e089f05cSChris Mason #include "transaction.h" 250f7d52f4SChris Mason #include "btrfs_inode.h" 260b86a832SChris Mason #include "volumes.h" 27db94535dSChris Mason #include "print-tree.h" 28925baeddSChris Mason #include "locking.h" 29e02119d5SChris Mason #include "tree-log.h" 30fa9c0d79SChris Mason #include "free-space-cache.h" 3170f6d82eSOmar Sandoval #include "free-space-tree.h" 32581bb050SLi Zefan #include "inode-map.h" 3321adbd5cSStefan Behrens #include "check-integrity.h" 34606686eeSJosef Bacik #include "rcu-string.h" 358dabb742SStefan Behrens #include "dev-replace.h" 3653b381b3SDavid Woodhouse #include "raid56.h" 375ac1d209SJeff Mahoney #include "sysfs.h" 38fcebe456SJosef Bacik #include "qgroup.h" 39ebb8765bSAnand Jain #include "compression.h" 40557ea5ddSQu Wenruo #include "tree-checker.h" 41fd708b81SJosef Bacik #include "ref-verify.h" 42aac0023cSJosef Bacik #include "block-group.h" 43b0643e59SDennis Zhou #include "discard.h" 44f603bb94SNikolay Borisov #include "space-info.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 101141386e1SJosef Bacik static void btrfs_free_csum_hash(struct btrfs_fs_info *fs_info) 102141386e1SJosef Bacik { 103141386e1SJosef Bacik if (fs_info->csum_shash) 104141386e1SJosef Bacik crypto_free_shash(fs_info->csum_shash); 105141386e1SJosef Bacik } 106141386e1SJosef Bacik 107d352ac68SChris Mason /* 108d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 109d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 110d352ac68SChris Mason * just before they are sent down the IO stack. 111d352ac68SChris Mason */ 11244b8bd7eSChris Mason struct async_submit_bio { 113c6100a4bSJosef Bacik void *private_data; 11444b8bd7eSChris Mason struct bio *bio; 115a758781dSDavid Sterba extent_submit_bio_start_t *submit_bio_start; 11644b8bd7eSChris Mason int mirror_num; 117eaf25d93SChris Mason /* 118eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 119eaf25d93SChris Mason * can't tell us where in the file the bio should go 120eaf25d93SChris Mason */ 121eaf25d93SChris Mason u64 bio_offset; 1228b712842SChris Mason struct btrfs_work work; 1234e4cbee9SChristoph Hellwig blk_status_t status; 12444b8bd7eSChris Mason }; 12544b8bd7eSChris Mason 12685d4e461SChris Mason /* 12785d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 12885d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 12985d4e461SChris Mason * the level the eb occupies in the tree. 1304008c04aSChris Mason * 13185d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 13285d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 13385d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 1344fd786e6SMisono Tomohiro * by btrfs_root->root_key.objectid. This ensures that all special purpose 1354fd786e6SMisono Tomohiro * roots have separate keysets. 1364008c04aSChris Mason * 13785d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 13885d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 13985d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1404008c04aSChris Mason * 14185d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 14285d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 14385d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 14485d4e461SChris Mason * 14585d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 14685d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 14785d4e461SChris Mason * needs update as well. 1484008c04aSChris Mason */ 1494008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1504008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1514008c04aSChris Mason # error 1524008c04aSChris Mason # endif 15385d4e461SChris Mason 15485d4e461SChris Mason static struct btrfs_lockdep_keyset { 15585d4e461SChris Mason u64 id; /* root objectid */ 15685d4e461SChris Mason const char *name_stem; /* lock name stem */ 15785d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 15885d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 15985d4e461SChris Mason } btrfs_lockdep_keysets[] = { 16085d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 16185d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 16285d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 16385d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 16485d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 16585d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 16660b62978SDavid Sterba { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, 16785d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 16885d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 16985d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 17013fd8da9SDavid Sterba { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, 1716b20e0adSDavid Sterba { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, 17285d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1734008c04aSChris Mason }; 17485d4e461SChris Mason 17585d4e461SChris Mason void __init btrfs_init_lockdep(void) 17685d4e461SChris Mason { 17785d4e461SChris Mason int i, j; 17885d4e461SChris Mason 17985d4e461SChris Mason /* initialize lockdep class names */ 18085d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 18185d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 18285d4e461SChris Mason 18385d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 18485d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 18585d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 18685d4e461SChris Mason } 18785d4e461SChris Mason } 18885d4e461SChris Mason 18985d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 19085d4e461SChris Mason int level) 19185d4e461SChris Mason { 19285d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 19385d4e461SChris Mason 19485d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 19585d4e461SChris Mason 19685d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 19785d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 19885d4e461SChris Mason if (ks->id == objectid) 19985d4e461SChris Mason break; 20085d4e461SChris Mason 20185d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 20285d4e461SChris Mason &ks->keys[level], ks->names[level]); 20385d4e461SChris Mason } 20485d4e461SChris Mason 2054008c04aSChris Mason #endif 2064008c04aSChris Mason 207d352ac68SChris Mason /* 208d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 209d352ac68SChris Mason * that covers the entire device 210d352ac68SChris Mason */ 2116af49dbdSDavid Sterba struct extent_map *btree_get_extent(struct btrfs_inode *inode, 21239b07b5dSOmar Sandoval struct page *page, size_t pg_offset, 21339b07b5dSOmar Sandoval u64 start, u64 len) 2145f39d397SChris Mason { 215fc4f21b1SNikolay Borisov struct extent_map_tree *em_tree = &inode->extent_tree; 2165f39d397SChris Mason struct extent_map *em; 2175f39d397SChris Mason int ret; 2185f39d397SChris Mason 219890871beSChris Mason read_lock(&em_tree->lock); 220d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 221a061fc8dSChris Mason if (em) { 222890871beSChris Mason read_unlock(&em_tree->lock); 2235f39d397SChris Mason goto out; 224a061fc8dSChris Mason } 225890871beSChris Mason read_unlock(&em_tree->lock); 2267b13b7b1SChris Mason 227172ddd60SDavid Sterba em = alloc_extent_map(); 2285f39d397SChris Mason if (!em) { 2295f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2305f39d397SChris Mason goto out; 2315f39d397SChris Mason } 2325f39d397SChris Mason em->start = 0; 2330afbaf8cSChris Mason em->len = (u64)-1; 234c8b97818SChris Mason em->block_len = (u64)-1; 2355f39d397SChris Mason em->block_start = 0; 236d1310b2eSChris Mason 237890871beSChris Mason write_lock(&em_tree->lock); 23809a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2395f39d397SChris Mason if (ret == -EEXIST) { 2405f39d397SChris Mason free_extent_map(em); 2417b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 242b4f359abSTsutomu Itoh if (!em) 2430433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2445f39d397SChris Mason } else if (ret) { 2457b13b7b1SChris Mason free_extent_map(em); 2460433f20dSTsutomu Itoh em = ERR_PTR(ret); 2475f39d397SChris Mason } 248890871beSChris Mason write_unlock(&em_tree->lock); 2497b13b7b1SChris Mason 2505f39d397SChris Mason out: 2515f39d397SChris Mason return em; 2525f39d397SChris Mason } 2535f39d397SChris Mason 254d352ac68SChris Mason /* 2552996e1f8SJohannes Thumshirn * Compute the csum of a btree block and store the result to provided buffer. 256d352ac68SChris Mason */ 257c67b3892SDavid Sterba static void csum_tree_block(struct extent_buffer *buf, u8 *result) 25819c00ddcSChris Mason { 259d5178578SJohannes Thumshirn struct btrfs_fs_info *fs_info = buf->fs_info; 260e9be5a30SDavid Sterba const int num_pages = fs_info->nodesize >> PAGE_SHIFT; 261d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 26219c00ddcSChris Mason char *kaddr; 263e9be5a30SDavid Sterba int i; 264d5178578SJohannes Thumshirn 265d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 266d5178578SJohannes Thumshirn crypto_shash_init(shash); 267e9be5a30SDavid Sterba kaddr = page_address(buf->pages[0]); 268e9be5a30SDavid Sterba crypto_shash_update(shash, kaddr + BTRFS_CSUM_SIZE, 269e9be5a30SDavid Sterba PAGE_SIZE - BTRFS_CSUM_SIZE); 27019c00ddcSChris Mason 271e9be5a30SDavid Sterba for (i = 1; i < num_pages; i++) { 272e9be5a30SDavid Sterba kaddr = page_address(buf->pages[i]); 273e9be5a30SDavid Sterba crypto_shash_update(shash, kaddr, PAGE_SIZE); 27419c00ddcSChris Mason } 27571a63551SDavid Sterba memset(result, 0, BTRFS_CSUM_SIZE); 276d5178578SJohannes Thumshirn crypto_shash_final(shash, result); 27719c00ddcSChris Mason } 27819c00ddcSChris Mason 279d352ac68SChris Mason /* 280d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 281d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 282d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 283d352ac68SChris Mason * in the wrong place. 284d352ac68SChris Mason */ 2851259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 286b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 287b9fab919SChris Mason int atomic) 2881259ab75SChris Mason { 2892ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 2901259ab75SChris Mason int ret; 2912755a0deSDavid Sterba bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); 2921259ab75SChris Mason 2931259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 2941259ab75SChris Mason return 0; 2951259ab75SChris Mason 296b9fab919SChris Mason if (atomic) 297b9fab919SChris Mason return -EAGAIN; 298b9fab919SChris Mason 299a26e8c9fSJosef Bacik if (need_lock) { 300a26e8c9fSJosef Bacik btrfs_tree_read_lock(eb); 301300aa896SDavid Sterba btrfs_set_lock_blocking_read(eb); 302a26e8c9fSJosef Bacik } 303a26e8c9fSJosef Bacik 3042ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 305ff13db41SDavid Sterba &cached_state); 3060b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3071259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3081259ab75SChris Mason ret = 0; 3091259ab75SChris Mason goto out; 3101259ab75SChris Mason } 31194647322SDavid Sterba btrfs_err_rl(eb->fs_info, 31294647322SDavid Sterba "parent transid verify failed on %llu wanted %llu found %llu", 31394647322SDavid Sterba eb->start, 31429549aecSWang Shilong parent_transid, btrfs_header_generation(eb)); 3151259ab75SChris Mason ret = 1; 316a26e8c9fSJosef Bacik 317a26e8c9fSJosef Bacik /* 318a26e8c9fSJosef Bacik * Things reading via commit roots that don't have normal protection, 319a26e8c9fSJosef Bacik * like send, can have a really old block in cache that may point at a 32001327610SNicholas D Steeves * block that has been freed and re-allocated. So don't clear uptodate 321a26e8c9fSJosef Bacik * if we find an eb that is under IO (dirty/writeback) because we could 322a26e8c9fSJosef Bacik * end up reading in the stale data and then writing it back out and 323a26e8c9fSJosef Bacik * making everybody very sad. 324a26e8c9fSJosef Bacik */ 325a26e8c9fSJosef Bacik if (!extent_buffer_under_io(eb)) 3260b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 32733958dc6SChris Mason out: 3282ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 329e43bbe5eSDavid Sterba &cached_state); 330472b909fSJosef Bacik if (need_lock) 331a26e8c9fSJosef Bacik btrfs_tree_read_unlock_blocking(eb); 3321259ab75SChris Mason return ret; 3331259ab75SChris Mason } 3341259ab75SChris Mason 335e7e16f48SJohannes Thumshirn static bool btrfs_supported_super_csum(u16 csum_type) 336e7e16f48SJohannes Thumshirn { 337e7e16f48SJohannes Thumshirn switch (csum_type) { 338e7e16f48SJohannes Thumshirn case BTRFS_CSUM_TYPE_CRC32: 3393951e7f0SJohannes Thumshirn case BTRFS_CSUM_TYPE_XXHASH: 3403831bf00SJohannes Thumshirn case BTRFS_CSUM_TYPE_SHA256: 341352ae07bSDavid Sterba case BTRFS_CSUM_TYPE_BLAKE2: 342e7e16f48SJohannes Thumshirn return true; 343e7e16f48SJohannes Thumshirn default: 344e7e16f48SJohannes Thumshirn return false; 345e7e16f48SJohannes Thumshirn } 346e7e16f48SJohannes Thumshirn } 347e7e16f48SJohannes Thumshirn 348d352ac68SChris Mason /* 3491104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 3501104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 3511104a885SDavid Sterba */ 352ab8d0fc4SJeff Mahoney static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, 353ab8d0fc4SJeff Mahoney char *raw_disk_sb) 3541104a885SDavid Sterba { 3551104a885SDavid Sterba struct btrfs_super_block *disk_sb = 3561104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 35751bce6c9SJohannes Thumshirn char result[BTRFS_CSUM_SIZE]; 358d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 359d5178578SJohannes Thumshirn 360d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 361d5178578SJohannes Thumshirn crypto_shash_init(shash); 3621104a885SDavid Sterba 3631104a885SDavid Sterba /* 3641104a885SDavid Sterba * The super_block structure does not span the whole 36551bce6c9SJohannes Thumshirn * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space is 36651bce6c9SJohannes Thumshirn * filled with zeros and is included in the checksum. 3671104a885SDavid Sterba */ 368d5178578SJohannes Thumshirn crypto_shash_update(shash, raw_disk_sb + BTRFS_CSUM_SIZE, 369d5178578SJohannes Thumshirn BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 370d5178578SJohannes Thumshirn crypto_shash_final(shash, result); 3711104a885SDavid Sterba 37251bce6c9SJohannes Thumshirn if (memcmp(disk_sb->csum, result, btrfs_super_csum_size(disk_sb))) 373e7e16f48SJohannes Thumshirn return 1; 3741104a885SDavid Sterba 375e7e16f48SJohannes Thumshirn return 0; 3761104a885SDavid Sterba } 3771104a885SDavid Sterba 378e064d5e9SDavid Sterba int btrfs_verify_level_key(struct extent_buffer *eb, int level, 379ff76a864SLiu Bo struct btrfs_key *first_key, u64 parent_transid) 380581c1760SQu Wenruo { 381e064d5e9SDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 382581c1760SQu Wenruo int found_level; 383581c1760SQu Wenruo struct btrfs_key found_key; 384581c1760SQu Wenruo int ret; 385581c1760SQu Wenruo 386581c1760SQu Wenruo found_level = btrfs_header_level(eb); 387581c1760SQu Wenruo if (found_level != level) { 38863489055SQu Wenruo WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG), 38963489055SQu Wenruo KERN_ERR "BTRFS: tree level check failed\n"); 390581c1760SQu Wenruo btrfs_err(fs_info, 391581c1760SQu Wenruo "tree level mismatch detected, bytenr=%llu level expected=%u has=%u", 392581c1760SQu Wenruo eb->start, level, found_level); 393581c1760SQu Wenruo return -EIO; 394581c1760SQu Wenruo } 395581c1760SQu Wenruo 396581c1760SQu Wenruo if (!first_key) 397581c1760SQu Wenruo return 0; 398581c1760SQu Wenruo 3995d41be6fSQu Wenruo /* 4005d41be6fSQu Wenruo * For live tree block (new tree blocks in current transaction), 4015d41be6fSQu Wenruo * we need proper lock context to avoid race, which is impossible here. 4025d41be6fSQu Wenruo * So we only checks tree blocks which is read from disk, whose 4035d41be6fSQu Wenruo * generation <= fs_info->last_trans_committed. 4045d41be6fSQu Wenruo */ 4055d41be6fSQu Wenruo if (btrfs_header_generation(eb) > fs_info->last_trans_committed) 4065d41be6fSQu Wenruo return 0; 40762fdaa52SQu Wenruo 40862fdaa52SQu Wenruo /* We have @first_key, so this @eb must have at least one item */ 40962fdaa52SQu Wenruo if (btrfs_header_nritems(eb) == 0) { 41062fdaa52SQu Wenruo btrfs_err(fs_info, 41162fdaa52SQu Wenruo "invalid tree nritems, bytenr=%llu nritems=0 expect >0", 41262fdaa52SQu Wenruo eb->start); 41362fdaa52SQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 41462fdaa52SQu Wenruo return -EUCLEAN; 41562fdaa52SQu Wenruo } 41662fdaa52SQu Wenruo 417581c1760SQu Wenruo if (found_level) 418581c1760SQu Wenruo btrfs_node_key_to_cpu(eb, &found_key, 0); 419581c1760SQu Wenruo else 420581c1760SQu Wenruo btrfs_item_key_to_cpu(eb, &found_key, 0); 421581c1760SQu Wenruo ret = btrfs_comp_cpu_keys(first_key, &found_key); 422581c1760SQu Wenruo 423581c1760SQu Wenruo if (ret) { 42463489055SQu Wenruo WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG), 42563489055SQu Wenruo KERN_ERR "BTRFS: tree first key check failed\n"); 426581c1760SQu Wenruo btrfs_err(fs_info, 427ff76a864SLiu Bo "tree first key mismatch detected, bytenr=%llu parent_transid=%llu key expected=(%llu,%u,%llu) has=(%llu,%u,%llu)", 428ff76a864SLiu Bo eb->start, parent_transid, first_key->objectid, 429ff76a864SLiu Bo first_key->type, first_key->offset, 430ff76a864SLiu Bo found_key.objectid, found_key.type, 431ff76a864SLiu Bo found_key.offset); 432581c1760SQu Wenruo } 433581c1760SQu Wenruo return ret; 434581c1760SQu Wenruo } 435581c1760SQu Wenruo 4361104a885SDavid Sterba /* 437d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 438d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 439581c1760SQu Wenruo * 440581c1760SQu Wenruo * @parent_transid: expected transid, skip check if 0 441581c1760SQu Wenruo * @level: expected level, mandatory check 442581c1760SQu Wenruo * @first_key: expected key of first slot, skip check if NULL 443d352ac68SChris Mason */ 4445ab12d1fSDavid Sterba static int btree_read_extent_buffer_pages(struct extent_buffer *eb, 445581c1760SQu Wenruo u64 parent_transid, int level, 446581c1760SQu Wenruo struct btrfs_key *first_key) 447f188591eSChris Mason { 4485ab12d1fSDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 449f188591eSChris Mason struct extent_io_tree *io_tree; 450ea466794SJosef Bacik int failed = 0; 451f188591eSChris Mason int ret; 452f188591eSChris Mason int num_copies = 0; 453f188591eSChris Mason int mirror_num = 0; 454ea466794SJosef Bacik int failed_mirror = 0; 455f188591eSChris Mason 4560b246afaSJeff Mahoney io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree; 457f188591eSChris Mason while (1) { 458f8397d69SNikolay Borisov clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 459c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(eb, WAIT_COMPLETE, mirror_num); 460256dd1bbSStefan Behrens if (!ret) { 461581c1760SQu Wenruo if (verify_parent_transid(io_tree, eb, 462b9fab919SChris Mason parent_transid, 0)) 463256dd1bbSStefan Behrens ret = -EIO; 464e064d5e9SDavid Sterba else if (btrfs_verify_level_key(eb, level, 465ff76a864SLiu Bo first_key, parent_transid)) 466581c1760SQu Wenruo ret = -EUCLEAN; 467581c1760SQu Wenruo else 468581c1760SQu Wenruo break; 469256dd1bbSStefan Behrens } 470d397712bSChris Mason 4710b246afaSJeff Mahoney num_copies = btrfs_num_copies(fs_info, 472f188591eSChris Mason eb->start, eb->len); 4734235298eSChris Mason if (num_copies == 1) 474ea466794SJosef Bacik break; 4754235298eSChris Mason 4765cf1ab56SJosef Bacik if (!failed_mirror) { 4775cf1ab56SJosef Bacik failed = 1; 4785cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4795cf1ab56SJosef Bacik } 4805cf1ab56SJosef Bacik 481f188591eSChris Mason mirror_num++; 482ea466794SJosef Bacik if (mirror_num == failed_mirror) 483ea466794SJosef Bacik mirror_num++; 484ea466794SJosef Bacik 4854235298eSChris Mason if (mirror_num > num_copies) 486ea466794SJosef Bacik break; 487f188591eSChris Mason } 488ea466794SJosef Bacik 489c0901581SStefan Behrens if (failed && !ret && failed_mirror) 49020a1fbf9SDavid Sterba btrfs_repair_eb_io_failure(eb, failed_mirror); 491ea466794SJosef Bacik 492ea466794SJosef Bacik return ret; 493f188591eSChris Mason } 49419c00ddcSChris Mason 495d352ac68SChris Mason /* 496d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 497d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 498d352ac68SChris Mason */ 499d397712bSChris Mason 50001d58472SDaniel Dressler static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) 50119c00ddcSChris Mason { 5024eee4fa4SMiao Xie u64 start = page_offset(page); 50319c00ddcSChris Mason u64 found_start; 5042996e1f8SJohannes Thumshirn u8 result[BTRFS_CSUM_SIZE]; 5052996e1f8SJohannes Thumshirn u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 50619c00ddcSChris Mason struct extent_buffer *eb; 5078d47a0d8SQu Wenruo int ret; 508f188591eSChris Mason 5094f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 5104f2de97aSJosef Bacik if (page != eb->pages[0]) 5114f2de97aSJosef Bacik return 0; 5120f805531SAlex Lyakas 51319c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 5140f805531SAlex Lyakas /* 5150f805531SAlex Lyakas * Please do not consolidate these warnings into a single if. 5160f805531SAlex Lyakas * It is useful to know what went wrong. 5170f805531SAlex Lyakas */ 5180f805531SAlex Lyakas if (WARN_ON(found_start != start)) 5190f805531SAlex Lyakas return -EUCLEAN; 5200f805531SAlex Lyakas if (WARN_ON(!PageUptodate(page))) 5210f805531SAlex Lyakas return -EUCLEAN; 5220f805531SAlex Lyakas 523de37aa51SNikolay Borisov ASSERT(memcmp_extent_buffer(eb, fs_info->fs_devices->metadata_uuid, 5249a8658e3SDavid Sterba offsetof(struct btrfs_header, fsid), 5259a8658e3SDavid Sterba BTRFS_FSID_SIZE) == 0); 5260f805531SAlex Lyakas 527c67b3892SDavid Sterba csum_tree_block(eb, result); 5282996e1f8SJohannes Thumshirn 5298d47a0d8SQu Wenruo if (btrfs_header_level(eb)) 5308d47a0d8SQu Wenruo ret = btrfs_check_node(eb); 5318d47a0d8SQu Wenruo else 5328d47a0d8SQu Wenruo ret = btrfs_check_leaf_full(eb); 5338d47a0d8SQu Wenruo 5348d47a0d8SQu Wenruo if (ret < 0) { 535c06631b0SQu Wenruo btrfs_print_tree(eb, 0); 5368d47a0d8SQu Wenruo btrfs_err(fs_info, 5378d47a0d8SQu Wenruo "block=%llu write time tree block corruption detected", 5388d47a0d8SQu Wenruo eb->start); 539c06631b0SQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 5408d47a0d8SQu Wenruo return ret; 5418d47a0d8SQu Wenruo } 5422996e1f8SJohannes Thumshirn write_extent_buffer(eb, result, 0, csum_size); 5438d47a0d8SQu Wenruo 5442996e1f8SJohannes Thumshirn return 0; 54519c00ddcSChris Mason } 54619c00ddcSChris Mason 547b0c9b3b0SDavid Sterba static int check_tree_block_fsid(struct extent_buffer *eb) 5482b82032cSYan Zheng { 549b0c9b3b0SDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 55001d58472SDaniel Dressler struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; 55144880fdcSAnand Jain u8 fsid[BTRFS_FSID_SIZE]; 5522b82032cSYan Zheng int ret = 1; 5532b82032cSYan Zheng 5549a8658e3SDavid Sterba read_extent_buffer(eb, fsid, offsetof(struct btrfs_header, fsid), 5559a8658e3SDavid Sterba BTRFS_FSID_SIZE); 5562b82032cSYan Zheng while (fs_devices) { 5577239ff4bSNikolay Borisov u8 *metadata_uuid; 5587239ff4bSNikolay Borisov 5597239ff4bSNikolay Borisov /* 5607239ff4bSNikolay Borisov * Checking the incompat flag is only valid for the current 5617239ff4bSNikolay Borisov * fs. For seed devices it's forbidden to have their uuid 5627239ff4bSNikolay Borisov * changed so reading ->fsid in this case is fine 5637239ff4bSNikolay Borisov */ 5647239ff4bSNikolay Borisov if (fs_devices == fs_info->fs_devices && 5657239ff4bSNikolay Borisov btrfs_fs_incompat(fs_info, METADATA_UUID)) 5667239ff4bSNikolay Borisov metadata_uuid = fs_devices->metadata_uuid; 5677239ff4bSNikolay Borisov else 5687239ff4bSNikolay Borisov metadata_uuid = fs_devices->fsid; 5697239ff4bSNikolay Borisov 5707239ff4bSNikolay Borisov if (!memcmp(fsid, metadata_uuid, BTRFS_FSID_SIZE)) { 5712b82032cSYan Zheng ret = 0; 5722b82032cSYan Zheng break; 5732b82032cSYan Zheng } 5742b82032cSYan Zheng fs_devices = fs_devices->seed; 5752b82032cSYan Zheng } 5762b82032cSYan Zheng return ret; 5772b82032cSYan Zheng } 5782b82032cSYan Zheng 579facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 580facc8a22SMiao Xie u64 phy_offset, struct page *page, 581facc8a22SMiao Xie u64 start, u64 end, int mirror) 582ce9adaa5SChris Mason { 583ce9adaa5SChris Mason u64 found_start; 584ce9adaa5SChris Mason int found_level; 585ce9adaa5SChris Mason struct extent_buffer *eb; 58615b6e8a8SDavid Sterba struct btrfs_fs_info *fs_info; 58715b6e8a8SDavid Sterba u16 csum_size; 588f188591eSChris Mason int ret = 0; 5892996e1f8SJohannes Thumshirn u8 result[BTRFS_CSUM_SIZE]; 590727011e0SChris Mason int reads_done; 591ce9adaa5SChris Mason 592ce9adaa5SChris Mason if (!page->private) 593ce9adaa5SChris Mason goto out; 594d397712bSChris Mason 5954f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 59615b6e8a8SDavid Sterba fs_info = eb->fs_info; 59715b6e8a8SDavid Sterba csum_size = btrfs_super_csum_size(fs_info->super_copy); 598d397712bSChris Mason 5990b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 6000b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 6010b32f4bbSJosef Bacik */ 60267439dadSDavid Sterba atomic_inc(&eb->refs); 6030b32f4bbSJosef Bacik 6040b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 605727011e0SChris Mason if (!reads_done) 606727011e0SChris Mason goto err; 607f188591eSChris Mason 6085cf1ab56SJosef Bacik eb->read_mirror = mirror; 609656f30dbSFilipe Manana if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { 610ea466794SJosef Bacik ret = -EIO; 611ea466794SJosef Bacik goto err; 612ea466794SJosef Bacik } 613ea466794SJosef Bacik 614ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 615727011e0SChris Mason if (found_start != eb->start) { 616893bf4b1SSu Yue btrfs_err_rl(fs_info, "bad tree block start, want %llu have %llu", 617893bf4b1SSu Yue eb->start, found_start); 618f188591eSChris Mason ret = -EIO; 619ce9adaa5SChris Mason goto err; 620ce9adaa5SChris Mason } 621b0c9b3b0SDavid Sterba if (check_tree_block_fsid(eb)) { 62202873e43SZhao Lei btrfs_err_rl(fs_info, "bad fsid on block %llu", 62394647322SDavid Sterba eb->start); 6241259ab75SChris Mason ret = -EIO; 6251259ab75SChris Mason goto err; 6261259ab75SChris Mason } 627ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6281c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 629893bf4b1SSu Yue btrfs_err(fs_info, "bad tree block level %d on %llu", 630893bf4b1SSu Yue (int)btrfs_header_level(eb), eb->start); 6311c24c3ceSJosef Bacik ret = -EIO; 6321c24c3ceSJosef Bacik goto err; 6331c24c3ceSJosef Bacik } 634ce9adaa5SChris Mason 63585d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 63685d4e461SChris Mason eb, found_level); 6374008c04aSChris Mason 638c67b3892SDavid Sterba csum_tree_block(eb, result); 639a826d6dcSJosef Bacik 6402996e1f8SJohannes Thumshirn if (memcmp_extent_buffer(eb, result, 0, csum_size)) { 6412996e1f8SJohannes Thumshirn u32 val; 6422996e1f8SJohannes Thumshirn u32 found = 0; 6432996e1f8SJohannes Thumshirn 6442996e1f8SJohannes Thumshirn memcpy(&found, result, csum_size); 6452996e1f8SJohannes Thumshirn 6462996e1f8SJohannes Thumshirn read_extent_buffer(eb, &val, 0, csum_size); 6472996e1f8SJohannes Thumshirn btrfs_warn_rl(fs_info, 6482996e1f8SJohannes Thumshirn "%s checksum verify failed on %llu wanted %x found %x level %d", 6492996e1f8SJohannes Thumshirn fs_info->sb->s_id, eb->start, 6502996e1f8SJohannes Thumshirn val, found, btrfs_header_level(eb)); 6512996e1f8SJohannes Thumshirn ret = -EUCLEAN; 6522996e1f8SJohannes Thumshirn goto err; 6532996e1f8SJohannes Thumshirn } 6542996e1f8SJohannes Thumshirn 655a826d6dcSJosef Bacik /* 656a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 657a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 658a826d6dcSJosef Bacik * return -EIO. 659a826d6dcSJosef Bacik */ 6601c4360eeSDavid Sterba if (found_level == 0 && btrfs_check_leaf_full(eb)) { 661a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 662a826d6dcSJosef Bacik ret = -EIO; 663a826d6dcSJosef Bacik } 664ce9adaa5SChris Mason 665813fd1dcSDavid Sterba if (found_level > 0 && btrfs_check_node(eb)) 666053ab70fSLiu Bo ret = -EIO; 667053ab70fSLiu Bo 6680b32f4bbSJosef Bacik if (!ret) 6690b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 67075391f0dSQu Wenruo else 67175391f0dSQu Wenruo btrfs_err(fs_info, 67275391f0dSQu Wenruo "block=%llu read time tree block corruption detected", 67375391f0dSQu Wenruo eb->start); 674ce9adaa5SChris Mason err: 67579fb65a1SJosef Bacik if (reads_done && 67679fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 677d48d71aaSDavid Sterba btree_readahead_hook(eb, ret); 6784bb31e92SArne Jansen 67953b381b3SDavid Woodhouse if (ret) { 68053b381b3SDavid Woodhouse /* 68153b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 68253b381b3SDavid Woodhouse * again, we have to make sure it has something 68353b381b3SDavid Woodhouse * to decrement 68453b381b3SDavid Woodhouse */ 68553b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6860b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 68753b381b3SDavid Woodhouse } 6880b32f4bbSJosef Bacik free_extent_buffer(eb); 689ce9adaa5SChris Mason out: 690f188591eSChris Mason return ret; 691ce9adaa5SChris Mason } 692ce9adaa5SChris Mason 6934246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 694ce9adaa5SChris Mason { 69597eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 696ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 6979e0af237SLiu Bo struct btrfs_workqueue *wq; 698ce9adaa5SChris Mason 699ce9adaa5SChris Mason fs_info = end_io_wq->info; 7004e4cbee9SChristoph Hellwig end_io_wq->status = bio->bi_status; 701d20f7043SChris Mason 70237226b21SMike Christie if (bio_op(bio) == REQ_OP_WRITE) { 703a0cac0ecSOmar Sandoval if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 7049e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 705a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 7069e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 707a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7089e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 709a0cac0ecSOmar Sandoval else 7109e0af237SLiu Bo wq = fs_info->endio_write_workers; 7119e0af237SLiu Bo } else { 712a0cac0ecSOmar Sandoval if (unlikely(end_io_wq->metadata == BTRFS_WQ_ENDIO_DIO_REPAIR)) 7138b110e39SMiao Xie wq = fs_info->endio_repair_workers; 714a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7159e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 716a0cac0ecSOmar Sandoval else if (end_io_wq->metadata) 7179e0af237SLiu Bo wq = fs_info->endio_meta_workers; 718a0cac0ecSOmar Sandoval else 7199e0af237SLiu Bo wq = fs_info->endio_workers; 7209e0af237SLiu Bo } 7219e0af237SLiu Bo 722a0cac0ecSOmar Sandoval btrfs_init_work(&end_io_wq->work, end_workqueue_fn, NULL, NULL); 7239e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 724ce9adaa5SChris Mason } 725ce9adaa5SChris Mason 7264e4cbee9SChristoph Hellwig blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 727bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 7280b86a832SChris Mason { 72997eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 7308b110e39SMiao Xie 73197eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 732ce9adaa5SChris Mason if (!end_io_wq) 7334e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 734ce9adaa5SChris Mason 735ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 736ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 73722c59948SChris Mason end_io_wq->info = info; 7384e4cbee9SChristoph Hellwig end_io_wq->status = 0; 739ce9adaa5SChris Mason end_io_wq->bio = bio; 74022c59948SChris Mason end_io_wq->metadata = metadata; 741ce9adaa5SChris Mason 742ce9adaa5SChris Mason bio->bi_private = end_io_wq; 743ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 74422c59948SChris Mason return 0; 74522c59948SChris Mason } 74622c59948SChris Mason 7474a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7484a69a410SChris Mason { 7494a69a410SChris Mason struct async_submit_bio *async; 7504e4cbee9SChristoph Hellwig blk_status_t ret; 7514a69a410SChris Mason 7524a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 753c6100a4bSJosef Bacik ret = async->submit_bio_start(async->private_data, async->bio, 754eaf25d93SChris Mason async->bio_offset); 75579787eaaSJeff Mahoney if (ret) 7564e4cbee9SChristoph Hellwig async->status = ret; 7574a69a410SChris Mason } 7584a69a410SChris Mason 75906ea01b1SDavid Sterba /* 76006ea01b1SDavid Sterba * In order to insert checksums into the metadata in large chunks, we wait 76106ea01b1SDavid Sterba * until bio submission time. All the pages in the bio are checksummed and 76206ea01b1SDavid Sterba * sums are attached onto the ordered extent record. 76306ea01b1SDavid Sterba * 76406ea01b1SDavid Sterba * At IO completion time the csums attached on the ordered extent record are 76506ea01b1SDavid Sterba * inserted into the tree. 76606ea01b1SDavid Sterba */ 7674a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7688b712842SChris Mason { 7698b712842SChris Mason struct async_submit_bio *async; 77006ea01b1SDavid Sterba struct inode *inode; 77106ea01b1SDavid Sterba blk_status_t ret; 7728b712842SChris Mason 7738b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 77406ea01b1SDavid Sterba inode = async->private_data; 7754854ddd0SChris Mason 776bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 7774e4cbee9SChristoph Hellwig if (async->status) { 7784e4cbee9SChristoph Hellwig async->bio->bi_status = async->status; 7794246a0b6SChristoph Hellwig bio_endio(async->bio); 78079787eaaSJeff Mahoney return; 78179787eaaSJeff Mahoney } 78279787eaaSJeff Mahoney 783ec39f769SChris Mason /* 784ec39f769SChris Mason * All of the bios that pass through here are from async helpers. 785ec39f769SChris Mason * Use REQ_CGROUP_PUNT to issue them from the owning cgroup's context. 786ec39f769SChris Mason * This changes nothing when cgroups aren't in use. 787ec39f769SChris Mason */ 788ec39f769SChris Mason async->bio->bi_opf |= REQ_CGROUP_PUNT; 78908635baeSChris Mason ret = btrfs_map_bio(btrfs_sb(inode->i_sb), async->bio, async->mirror_num); 79006ea01b1SDavid Sterba if (ret) { 79106ea01b1SDavid Sterba async->bio->bi_status = ret; 79206ea01b1SDavid Sterba bio_endio(async->bio); 79306ea01b1SDavid Sterba } 7944a69a410SChris Mason } 7954a69a410SChris Mason 7964a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7974a69a410SChris Mason { 7984a69a410SChris Mason struct async_submit_bio *async; 7994a69a410SChris Mason 8004a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 8018b712842SChris Mason kfree(async); 8028b712842SChris Mason } 8038b712842SChris Mason 8048c27cb35SLinus Torvalds blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 805c6100a4bSJosef Bacik int mirror_num, unsigned long bio_flags, 806c6100a4bSJosef Bacik u64 bio_offset, void *private_data, 807e288c080SDavid Sterba extent_submit_bio_start_t *submit_bio_start) 80844b8bd7eSChris Mason { 80944b8bd7eSChris Mason struct async_submit_bio *async; 81044b8bd7eSChris Mason 81144b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 81244b8bd7eSChris Mason if (!async) 8134e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 81444b8bd7eSChris Mason 815c6100a4bSJosef Bacik async->private_data = private_data; 81644b8bd7eSChris Mason async->bio = bio; 81744b8bd7eSChris Mason async->mirror_num = mirror_num; 8184a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8194a69a410SChris Mason 820a0cac0ecSOmar Sandoval btrfs_init_work(&async->work, run_one_async_start, run_one_async_done, 821a0cac0ecSOmar Sandoval run_one_async_free); 8224a69a410SChris Mason 823eaf25d93SChris Mason async->bio_offset = bio_offset; 8248c8bee1dSChris Mason 8254e4cbee9SChristoph Hellwig async->status = 0; 82679787eaaSJeff Mahoney 82767f055c7SChristoph Hellwig if (op_is_sync(bio->bi_opf)) 8285cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 829d313d7a3SChris Mason 8305cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 83144b8bd7eSChris Mason return 0; 83244b8bd7eSChris Mason } 83344b8bd7eSChris Mason 8344e4cbee9SChristoph Hellwig static blk_status_t btree_csum_one_bio(struct bio *bio) 835ce3ed71aSChris Mason { 8362c30c71bSKent Overstreet struct bio_vec *bvec; 837ce3ed71aSChris Mason struct btrfs_root *root; 8382b070cfeSChristoph Hellwig int ret = 0; 8396dc4f100SMing Lei struct bvec_iter_all iter_all; 840ce3ed71aSChris Mason 841c09abff8SDavid Sterba ASSERT(!bio_flagged(bio, BIO_CLONED)); 8422b070cfeSChristoph Hellwig bio_for_each_segment_all(bvec, bio, iter_all) { 843ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 84401d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 84579787eaaSJeff Mahoney if (ret) 84679787eaaSJeff Mahoney break; 847ce3ed71aSChris Mason } 8482c30c71bSKent Overstreet 8494e4cbee9SChristoph Hellwig return errno_to_blk_status(ret); 850ce3ed71aSChris Mason } 851ce3ed71aSChris Mason 852d0ee3934SDavid Sterba static blk_status_t btree_submit_bio_start(void *private_data, struct bio *bio, 853eaf25d93SChris Mason u64 bio_offset) 85422c59948SChris Mason { 8558b712842SChris Mason /* 8568b712842SChris Mason * when we're called for a write, we're already in the async 8575443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8588b712842SChris Mason */ 85979787eaaSJeff Mahoney return btree_csum_one_bio(bio); 86022c59948SChris Mason } 86122c59948SChris Mason 8629b4e675aSDavid Sterba static int check_async_write(struct btrfs_fs_info *fs_info, 8639b4e675aSDavid Sterba struct btrfs_inode *bi) 864de0022b9SJosef Bacik { 8656300463bSLiu Bo if (atomic_read(&bi->sync_writers)) 8666300463bSLiu Bo return 0; 8679b4e675aSDavid Sterba if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags)) 868de0022b9SJosef Bacik return 0; 869de0022b9SJosef Bacik return 1; 870de0022b9SJosef Bacik } 871de0022b9SJosef Bacik 872a56b1c7bSNikolay Borisov static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio, 87350489a57SNikolay Borisov int mirror_num, 87450489a57SNikolay Borisov unsigned long bio_flags) 87544b8bd7eSChris Mason { 8760b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); 8779b4e675aSDavid Sterba int async = check_async_write(fs_info, BTRFS_I(inode)); 8784e4cbee9SChristoph Hellwig blk_status_t ret; 879cad321adSChris Mason 88037226b21SMike Christie if (bio_op(bio) != REQ_OP_WRITE) { 881cad321adSChris Mason /* 882cad321adSChris Mason * called for a read, do the setup so that checksum validation 883cad321adSChris Mason * can happen in the async kernel threads 884cad321adSChris Mason */ 8850b246afaSJeff Mahoney ret = btrfs_bio_wq_end_io(fs_info, bio, 8860b246afaSJeff Mahoney BTRFS_WQ_ENDIO_METADATA); 8871d4284bdSChris Mason if (ret) 88861891923SStefan Behrens goto out_w_error; 88908635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 890de0022b9SJosef Bacik } else if (!async) { 891de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 892de0022b9SJosef Bacik if (ret) 89361891923SStefan Behrens goto out_w_error; 89408635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 89561891923SStefan Behrens } else { 896cad321adSChris Mason /* 89761891923SStefan Behrens * kthread helpers are used to submit writes so that 89861891923SStefan Behrens * checksumming can happen in parallel across all CPUs 899cad321adSChris Mason */ 900c6100a4bSJosef Bacik ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0, 901e68f2ee7SNikolay Borisov 0, inode, btree_submit_bio_start); 90244b8bd7eSChris Mason } 90344b8bd7eSChris Mason 9044246a0b6SChristoph Hellwig if (ret) 9054246a0b6SChristoph Hellwig goto out_w_error; 9064246a0b6SChristoph Hellwig return 0; 9074246a0b6SChristoph Hellwig 90861891923SStefan Behrens out_w_error: 9094e4cbee9SChristoph Hellwig bio->bi_status = ret; 9104246a0b6SChristoph Hellwig bio_endio(bio); 91161891923SStefan Behrens return ret; 91261891923SStefan Behrens } 91361891923SStefan Behrens 9143dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 915784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 916a6bc32b8SMel Gorman struct page *newpage, struct page *page, 917a6bc32b8SMel Gorman enum migrate_mode mode) 918784b4e29SChris Mason { 919784b4e29SChris Mason /* 920784b4e29SChris Mason * we can't safely write a btree page from here, 921784b4e29SChris Mason * we haven't done the locking hook 922784b4e29SChris Mason */ 923784b4e29SChris Mason if (PageDirty(page)) 924784b4e29SChris Mason return -EAGAIN; 925784b4e29SChris Mason /* 926784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 927784b4e29SChris Mason * We must have no buffers or drop them. 928784b4e29SChris Mason */ 929784b4e29SChris Mason if (page_has_private(page) && 930784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 931784b4e29SChris Mason return -EAGAIN; 932a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 933784b4e29SChris Mason } 9343dd1462eSJan Beulich #endif 935784b4e29SChris Mason 9360da5468fSChris Mason 9370da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9380da5468fSChris Mason struct writeback_control *wbc) 9390da5468fSChris Mason { 940e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 941e2d84521SMiao Xie int ret; 942e2d84521SMiao Xie 943d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 944448d640bSChris Mason 945448d640bSChris Mason if (wbc->for_kupdate) 946448d640bSChris Mason return 0; 947448d640bSChris Mason 948e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 949b9473439SChris Mason /* this is a bit racy, but that's ok */ 950d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 951d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 952d814a491SEthan Lien fs_info->dirty_metadata_batch); 953e2d84521SMiao Xie if (ret < 0) 954793955bcSChris Mason return 0; 955793955bcSChris Mason } 9560b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9570da5468fSChris Mason } 9580da5468fSChris Mason 959b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9605f39d397SChris Mason { 96171ad38b4SDavid Sterba return extent_read_full_page(page, btree_get_extent, 0); 9625f39d397SChris Mason } 9635f39d397SChris Mason 96470dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9655f39d397SChris Mason { 96698509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 96798509cfcSChris Mason return 0; 9680c4e538bSDavid Sterba 969f7a52a40SDavid Sterba return try_release_extent_buffer(page); 970d98237b3SChris Mason } 971d98237b3SChris Mason 972d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 973d47992f8SLukas Czerner unsigned int length) 974d98237b3SChris Mason { 975d1310b2eSChris Mason struct extent_io_tree *tree; 976d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9775f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9785f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9799ad6b7bcSChris Mason if (PagePrivate(page)) { 980efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 981efe120a0SFrank Holton "page private not zero on page %llu", 982efe120a0SFrank Holton (unsigned long long)page_offset(page)); 9839ad6b7bcSChris Mason ClearPagePrivate(page); 9849ad6b7bcSChris Mason set_page_private(page, 0); 98509cbfeafSKirill A. Shutemov put_page(page); 9869ad6b7bcSChris Mason } 987d98237b3SChris Mason } 988d98237b3SChris Mason 9890b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 9900b32f4bbSJosef Bacik { 991bb146eb2SJosef Bacik #ifdef DEBUG 9920b32f4bbSJosef Bacik struct extent_buffer *eb; 9930b32f4bbSJosef Bacik 9940b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 9950b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 9960b32f4bbSJosef Bacik BUG_ON(!eb); 9970b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 9980b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 9990b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1000bb146eb2SJosef Bacik #endif 10010b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10020b32f4bbSJosef Bacik } 10030b32f4bbSJosef Bacik 10047f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1005d98237b3SChris Mason .readpage = btree_readpage, 10060da5468fSChris Mason .writepages = btree_writepages, 10075f39d397SChris Mason .releasepage = btree_releasepage, 10085f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10095a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1010784b4e29SChris Mason .migratepage = btree_migratepage, 10115a92bc88SChris Mason #endif 10120b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1013d98237b3SChris Mason }; 1014123abc88SChris Mason 10152ff7e61eSJeff Mahoney void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr) 1016090d1875SChris Mason { 10175f39d397SChris Mason struct extent_buffer *buf = NULL; 1018537f38f0SNikolay Borisov int ret; 1019090d1875SChris Mason 10202ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1021c871b0f2SLiu Bo if (IS_ERR(buf)) 10226197d86eSDavid Sterba return; 1023537f38f0SNikolay Borisov 1024c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(buf, WAIT_NONE, 0); 1025537f38f0SNikolay Borisov if (ret < 0) 1026537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 1027537f38f0SNikolay Borisov else 10285f39d397SChris Mason free_extent_buffer(buf); 1029090d1875SChris Mason } 1030090d1875SChris Mason 10312ff7e61eSJeff Mahoney struct extent_buffer *btrfs_find_create_tree_block( 10322ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info, 10330308af44SDavid Sterba u64 bytenr) 10340999df54SChris Mason { 10350b246afaSJeff Mahoney if (btrfs_is_testing(fs_info)) 10360b246afaSJeff Mahoney return alloc_test_extent_buffer(fs_info, bytenr); 10370b246afaSJeff Mahoney return alloc_extent_buffer(fs_info, bytenr); 10380999df54SChris Mason } 10390999df54SChris Mason 1040581c1760SQu Wenruo /* 1041581c1760SQu Wenruo * Read tree block at logical address @bytenr and do variant basic but critical 1042581c1760SQu Wenruo * verification. 1043581c1760SQu Wenruo * 1044581c1760SQu Wenruo * @parent_transid: expected transid of this tree block, skip check if 0 1045581c1760SQu Wenruo * @level: expected level, mandatory check 1046581c1760SQu Wenruo * @first_key: expected key in slot 0, skip check if NULL 1047581c1760SQu Wenruo */ 10482ff7e61eSJeff Mahoney struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, 1049581c1760SQu Wenruo u64 parent_transid, int level, 1050581c1760SQu Wenruo struct btrfs_key *first_key) 1051e20d96d6SChris Mason { 10525f39d397SChris Mason struct extent_buffer *buf = NULL; 105319c00ddcSChris Mason int ret; 105419c00ddcSChris Mason 10552ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1056c871b0f2SLiu Bo if (IS_ERR(buf)) 1057c871b0f2SLiu Bo return buf; 1058e4204dedSChris Mason 10595ab12d1fSDavid Sterba ret = btree_read_extent_buffer_pages(buf, parent_transid, 1060581c1760SQu Wenruo level, first_key); 10610f0fe8f7SFilipe David Borba Manana if (ret) { 1062537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 106364c043deSLiu Bo return ERR_PTR(ret); 10640f0fe8f7SFilipe David Borba Manana } 10655f39d397SChris Mason return buf; 1066ce9adaa5SChris Mason 1067eb60ceacSChris Mason } 1068eb60ceacSChris Mason 10696a884d7dSDavid Sterba void btrfs_clean_tree_block(struct extent_buffer *buf) 1070ed2ff2cbSChris Mason { 10716a884d7dSDavid Sterba struct btrfs_fs_info *fs_info = buf->fs_info; 107255c69072SChris Mason if (btrfs_header_generation(buf) == 1073e2d84521SMiao Xie fs_info->running_transaction->transid) { 1074b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1075b4ce94deSChris Mason 1076b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1077104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 1078e2d84521SMiao Xie -buf->len, 1079e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1080b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 10818bead258SDavid Sterba btrfs_set_lock_blocking_write(buf); 10820b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1083925baeddSChris Mason } 10845f39d397SChris Mason } 1085ed7b63ebSJosef Bacik } 10865f39d397SChris Mason 1087da17066cSJeff Mahoney static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1088e20d96d6SChris Mason u64 objectid) 1089d97e63b6SChris Mason { 10907c0260eeSJeff Mahoney bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 109196dfcb46SJosef Bacik root->fs_info = fs_info; 1092cfaa7295SChris Mason root->node = NULL; 1093a28ec197SChris Mason root->commit_root = NULL; 109427cdeb70SMiao Xie root->state = 0; 1095d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 10960b86a832SChris Mason 10970f7d52f4SChris Mason root->last_trans = 0; 109813a8a7c8SYan, Zheng root->highest_objectid = 0; 1099eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1100199c2a9cSMiao Xie root->nr_ordered_extents = 0; 11016bef4d31SEric Paris root->inode_tree = RB_ROOT; 110216cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1103f0486c68SYan, Zheng root->block_rsv = NULL; 11040b86a832SChris Mason 11050b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11065d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1107eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1108eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1109199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1110199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 1111d2311e69SQu Wenruo INIT_LIST_HEAD(&root->reloc_dirty_list); 11122ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11132ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 11145d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1115eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1116199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1117f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 11182ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 11192ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 11208287475aSQu Wenruo spin_lock_init(&root->qgroup_meta_rsv_lock); 1121a2135011SChris Mason mutex_init(&root->objectid_mutex); 1122e02119d5SChris Mason mutex_init(&root->log_mutex); 112331f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1124573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 11257237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11267237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11277237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11288b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 11298b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 11307237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11317237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11327237f183SYan Zheng atomic_set(&root->log_writers, 0); 11332ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 11340700cea7SElena Reshetova refcount_set(&root->refs, 1); 11358ecebf4dSRobbie Ko atomic_set(&root->snapshot_force_cow, 0); 1136eede2bf3SOmar Sandoval atomic_set(&root->nr_swapfiles, 0); 11377237f183SYan Zheng root->log_transid = 0; 1138d1433debSMiao Xie root->log_transid_committed = -1; 1139257c62e1SChris Mason root->last_log_commit = 0; 11407c0260eeSJeff Mahoney if (!dummy) 114143eb5f29SQu Wenruo extent_io_tree_init(fs_info, &root->dirty_log_pages, 114243eb5f29SQu Wenruo IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL); 1143017e5369SChris Mason 11443768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11453768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11466702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 11477c0260eeSJeff Mahoney if (!dummy) 11483f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 114906ea65a3SJosef Bacik else 115006ea65a3SJosef Bacik root->defrag_trans_start = 0; 11514d775673SChris Mason root->root_key.objectid = objectid; 11520ee5dc67SAl Viro root->anon_dev = 0; 11538ea05e3aSAlexander Block 11545f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 1155370a11b8SQu Wenruo btrfs_qgroup_init_swapped_blocks(&root->swapped_blocks); 1156bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 1157bd647ce3SJosef Bacik INIT_LIST_HEAD(&root->leak_list); 1158bd647ce3SJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 1159bd647ce3SJosef Bacik list_add_tail(&root->leak_list, &fs_info->allocated_roots); 1160bd647ce3SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 1161bd647ce3SJosef Bacik #endif 11623768f368SChris Mason } 11633768f368SChris Mason 116474e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 116596dfcb46SJosef Bacik u64 objectid, gfp_t flags) 11666f07e42eSAl Viro { 116774e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 11686f07e42eSAl Viro if (root) 116996dfcb46SJosef Bacik __setup_root(root, fs_info, objectid); 11706f07e42eSAl Viro return root; 11716f07e42eSAl Viro } 11726f07e42eSAl Viro 117306ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 117406ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 1175da17066cSJeff Mahoney struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info) 117606ea65a3SJosef Bacik { 117706ea65a3SJosef Bacik struct btrfs_root *root; 117806ea65a3SJosef Bacik 11797c0260eeSJeff Mahoney if (!fs_info) 11807c0260eeSJeff Mahoney return ERR_PTR(-EINVAL); 11817c0260eeSJeff Mahoney 118296dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, GFP_KERNEL); 118306ea65a3SJosef Bacik if (!root) 118406ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1185da17066cSJeff Mahoney 1186b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 1187faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 118806ea65a3SJosef Bacik 118906ea65a3SJosef Bacik return root; 119006ea65a3SJosef Bacik } 119106ea65a3SJosef Bacik #endif 119206ea65a3SJosef Bacik 119320897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 119420897f5cSArne Jansen u64 objectid) 119520897f5cSArne Jansen { 11969b7a2440SDavid Sterba struct btrfs_fs_info *fs_info = trans->fs_info; 119720897f5cSArne Jansen struct extent_buffer *leaf; 119820897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 119920897f5cSArne Jansen struct btrfs_root *root; 120020897f5cSArne Jansen struct btrfs_key key; 1201b89f6d1fSFilipe Manana unsigned int nofs_flag; 120220897f5cSArne Jansen int ret = 0; 120320897f5cSArne Jansen 1204b89f6d1fSFilipe Manana /* 1205b89f6d1fSFilipe Manana * We're holding a transaction handle, so use a NOFS memory allocation 1206b89f6d1fSFilipe Manana * context to avoid deadlock if reclaim happens. 1207b89f6d1fSFilipe Manana */ 1208b89f6d1fSFilipe Manana nofs_flag = memalloc_nofs_save(); 120996dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, objectid, GFP_KERNEL); 1210b89f6d1fSFilipe Manana memalloc_nofs_restore(nofs_flag); 121120897f5cSArne Jansen if (!root) 121220897f5cSArne Jansen return ERR_PTR(-ENOMEM); 121320897f5cSArne Jansen 121420897f5cSArne Jansen root->root_key.objectid = objectid; 121520897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 121620897f5cSArne Jansen root->root_key.offset = 0; 121720897f5cSArne Jansen 12184d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 121920897f5cSArne Jansen if (IS_ERR(leaf)) { 122020897f5cSArne Jansen ret = PTR_ERR(leaf); 12211dd05682STsutomu Itoh leaf = NULL; 122220897f5cSArne Jansen goto fail; 122320897f5cSArne Jansen } 122420897f5cSArne Jansen 122520897f5cSArne Jansen root->node = leaf; 122620897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 122720897f5cSArne Jansen 122820897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 122927cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 123020897f5cSArne Jansen 123120897f5cSArne Jansen root->root_item.flags = 0; 123220897f5cSArne Jansen root->root_item.byte_limit = 0; 123320897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 123420897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 123520897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 123620897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 123720897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 123820897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 123920897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 124033d85fdaSQu Wenruo if (is_fstree(objectid)) 1241807fc790SAndy Shevchenko generate_random_guid(root->root_item.uuid); 1242807fc790SAndy Shevchenko else 1243807fc790SAndy Shevchenko export_guid(root->root_item.uuid, &guid_null); 124420897f5cSArne Jansen root->root_item.drop_level = 0; 124520897f5cSArne Jansen 124620897f5cSArne Jansen key.objectid = objectid; 124720897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 124820897f5cSArne Jansen key.offset = 0; 124920897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 125020897f5cSArne Jansen if (ret) 125120897f5cSArne Jansen goto fail; 125220897f5cSArne Jansen 125320897f5cSArne Jansen btrfs_tree_unlock(leaf); 125420897f5cSArne Jansen 125520897f5cSArne Jansen return root; 12561dd05682STsutomu Itoh 12571dd05682STsutomu Itoh fail: 12588c38938cSJosef Bacik if (leaf) 12591dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 126000246528SJosef Bacik btrfs_put_root(root); 12611dd05682STsutomu Itoh 12621dd05682STsutomu Itoh return ERR_PTR(ret); 126320897f5cSArne Jansen } 126420897f5cSArne Jansen 12657237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1266e02119d5SChris Mason struct btrfs_fs_info *fs_info) 12670f7d52f4SChris Mason { 12680f7d52f4SChris Mason struct btrfs_root *root; 12697237f183SYan Zheng struct extent_buffer *leaf; 1270e02119d5SChris Mason 127196dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, GFP_NOFS); 1272e02119d5SChris Mason if (!root) 12737237f183SYan Zheng return ERR_PTR(-ENOMEM); 1274e02119d5SChris Mason 1275e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1276e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1277e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 127827cdeb70SMiao Xie 12797237f183SYan Zheng /* 128027cdeb70SMiao Xie * DON'T set REF_COWS for log trees 128127cdeb70SMiao Xie * 12827237f183SYan Zheng * log trees do not get reference counted because they go away 12837237f183SYan Zheng * before a real commit is actually done. They do store pointers 12847237f183SYan Zheng * to file data extents, and those reference counts still get 12857237f183SYan Zheng * updated (along with back refs to the log tree). 12867237f183SYan Zheng */ 1287e02119d5SChris Mason 12884d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 12894d75f8a9SDavid Sterba NULL, 0, 0, 0); 12907237f183SYan Zheng if (IS_ERR(leaf)) { 129100246528SJosef Bacik btrfs_put_root(root); 12927237f183SYan Zheng return ERR_CAST(leaf); 12937237f183SYan Zheng } 1294e02119d5SChris Mason 12957237f183SYan Zheng root->node = leaf; 1296e02119d5SChris Mason 1297e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1298e02119d5SChris Mason btrfs_tree_unlock(root->node); 12997237f183SYan Zheng return root; 13007237f183SYan Zheng } 13017237f183SYan Zheng 13027237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 13037237f183SYan Zheng struct btrfs_fs_info *fs_info) 13047237f183SYan Zheng { 13057237f183SYan Zheng struct btrfs_root *log_root; 13067237f183SYan Zheng 13077237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13087237f183SYan Zheng if (IS_ERR(log_root)) 13097237f183SYan Zheng return PTR_ERR(log_root); 13107237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 13117237f183SYan Zheng fs_info->log_root_tree = log_root; 13127237f183SYan Zheng return 0; 13137237f183SYan Zheng } 13147237f183SYan Zheng 13157237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13167237f183SYan Zheng struct btrfs_root *root) 13177237f183SYan Zheng { 13180b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 13197237f183SYan Zheng struct btrfs_root *log_root; 13207237f183SYan Zheng struct btrfs_inode_item *inode_item; 13217237f183SYan Zheng 13220b246afaSJeff Mahoney log_root = alloc_log_tree(trans, fs_info); 13237237f183SYan Zheng if (IS_ERR(log_root)) 13247237f183SYan Zheng return PTR_ERR(log_root); 13257237f183SYan Zheng 13267237f183SYan Zheng log_root->last_trans = trans->transid; 13277237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 13287237f183SYan Zheng 13297237f183SYan Zheng inode_item = &log_root->root_item.inode; 13303cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 13313cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 13323cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1333da17066cSJeff Mahoney btrfs_set_stack_inode_nbytes(inode_item, 13340b246afaSJeff Mahoney fs_info->nodesize); 13353cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 13367237f183SYan Zheng 13375d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13387237f183SYan Zheng 13397237f183SYan Zheng WARN_ON(root->log_root); 13407237f183SYan Zheng root->log_root = log_root; 13417237f183SYan Zheng root->log_transid = 0; 1342d1433debSMiao Xie root->log_transid_committed = -1; 1343257c62e1SChris Mason root->last_log_commit = 0; 1344e02119d5SChris Mason return 0; 1345e02119d5SChris Mason } 1346e02119d5SChris Mason 134762a2c73eSJosef Bacik struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1348cb517eabSMiao Xie struct btrfs_key *key) 1349e02119d5SChris Mason { 1350e02119d5SChris Mason struct btrfs_root *root; 1351e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13520f7d52f4SChris Mason struct btrfs_path *path; 135384234f3aSYan Zheng u64 generation; 1354cb517eabSMiao Xie int ret; 1355581c1760SQu Wenruo int level; 1356cb517eabSMiao Xie 1357cb517eabSMiao Xie path = btrfs_alloc_path(); 1358cb517eabSMiao Xie if (!path) 1359cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 13600f7d52f4SChris Mason 136196dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, key->objectid, GFP_NOFS); 1362cb517eabSMiao Xie if (!root) { 1363cb517eabSMiao Xie ret = -ENOMEM; 1364cb517eabSMiao Xie goto alloc_fail; 13650f7d52f4SChris Mason } 13660f7d52f4SChris Mason 1367cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1368cb517eabSMiao Xie &root->root_item, &root->root_key); 13690f7d52f4SChris Mason if (ret) { 137013a8a7c8SYan, Zheng if (ret > 0) 137113a8a7c8SYan, Zheng ret = -ENOENT; 1372cb517eabSMiao Xie goto find_fail; 13730f7d52f4SChris Mason } 137413a8a7c8SYan, Zheng 137584234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1376581c1760SQu Wenruo level = btrfs_root_level(&root->root_item); 13772ff7e61eSJeff Mahoney root->node = read_tree_block(fs_info, 13782ff7e61eSJeff Mahoney btrfs_root_bytenr(&root->root_item), 1379581c1760SQu Wenruo generation, level, NULL); 138064c043deSLiu Bo if (IS_ERR(root->node)) { 138164c043deSLiu Bo ret = PTR_ERR(root->node); 13828c38938cSJosef Bacik root->node = NULL; 1383cb517eabSMiao Xie goto find_fail; 1384cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1385cb517eabSMiao Xie ret = -EIO; 138664c043deSLiu Bo goto find_fail; 1387416bc658SJosef Bacik } 13885d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 138913a8a7c8SYan, Zheng out: 1390cb517eabSMiao Xie btrfs_free_path(path); 1391cb517eabSMiao Xie return root; 1392cb517eabSMiao Xie 1393cb517eabSMiao Xie find_fail: 139400246528SJosef Bacik btrfs_put_root(root); 1395cb517eabSMiao Xie alloc_fail: 1396cb517eabSMiao Xie root = ERR_PTR(ret); 1397cb517eabSMiao Xie goto out; 1398cb517eabSMiao Xie } 1399cb517eabSMiao Xie 1400a98db0f3SJosef Bacik static int btrfs_init_fs_root(struct btrfs_root *root) 1401cb517eabSMiao Xie { 1402cb517eabSMiao Xie int ret; 1403dcc3eb96SNikolay Borisov unsigned int nofs_flag; 1404cb517eabSMiao Xie 1405cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1406cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1407cb517eabSMiao Xie GFP_NOFS); 1408cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1409cb517eabSMiao Xie ret = -ENOMEM; 1410cb517eabSMiao Xie goto fail; 1411cb517eabSMiao Xie } 1412cb517eabSMiao Xie 1413dcc3eb96SNikolay Borisov /* 1414dcc3eb96SNikolay Borisov * We might be called under a transaction (e.g. indirect backref 1415dcc3eb96SNikolay Borisov * resolution) which could deadlock if it triggers memory reclaim 1416dcc3eb96SNikolay Borisov */ 1417dcc3eb96SNikolay Borisov nofs_flag = memalloc_nofs_save(); 1418dcc3eb96SNikolay Borisov ret = btrfs_drew_lock_init(&root->snapshot_lock); 1419dcc3eb96SNikolay Borisov memalloc_nofs_restore(nofs_flag); 1420dcc3eb96SNikolay Borisov if (ret) 14218257b2dcSMiao Xie goto fail; 14228257b2dcSMiao Xie 1423f39e4571SJosef Bacik if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { 1424f39e4571SJosef Bacik set_bit(BTRFS_ROOT_REF_COWS, &root->state); 1425f39e4571SJosef Bacik btrfs_check_and_init_root_item(&root->root_item); 1426f39e4571SJosef Bacik } 1427f39e4571SJosef Bacik 1428cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 142957cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 143057cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1431cb517eabSMiao Xie 1432cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1433cb517eabSMiao Xie if (ret) 1434876d2cf1SLiu Bo goto fail; 1435f32e48e9SChandan Rajendra 1436f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1437f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1438f32e48e9SChandan Rajendra &root->highest_objectid); 1439f32e48e9SChandan Rajendra if (ret) { 1440f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1441876d2cf1SLiu Bo goto fail; 1442f32e48e9SChandan Rajendra } 1443f32e48e9SChandan Rajendra 1444f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1445f32e48e9SChandan Rajendra 1446f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1447f32e48e9SChandan Rajendra 1448cb517eabSMiao Xie return 0; 1449cb517eabSMiao Xie fail: 145084db5ccfSDavid Sterba /* The caller is responsible to call btrfs_free_fs_root */ 1451cb517eabSMiao Xie return ret; 1452cb517eabSMiao Xie } 1453cb517eabSMiao Xie 1454a98db0f3SJosef Bacik static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1455cb517eabSMiao Xie u64 root_id) 1456cb517eabSMiao Xie { 1457cb517eabSMiao Xie struct btrfs_root *root; 1458cb517eabSMiao Xie 1459cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1460cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1461cb517eabSMiao Xie (unsigned long)root_id); 1462bc44d7c4SJosef Bacik if (root) 146300246528SJosef Bacik root = btrfs_grab_root(root); 1464cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1465cb517eabSMiao Xie return root; 1466cb517eabSMiao Xie } 1467cb517eabSMiao Xie 1468cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1469cb517eabSMiao Xie struct btrfs_root *root) 1470cb517eabSMiao Xie { 1471cb517eabSMiao Xie int ret; 1472cb517eabSMiao Xie 1473e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1474cb517eabSMiao Xie if (ret) 1475cb517eabSMiao Xie return ret; 1476cb517eabSMiao Xie 1477cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1478cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1479cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1480cb517eabSMiao Xie root); 1481af01d2e5SJosef Bacik if (ret == 0) { 148200246528SJosef Bacik btrfs_grab_root(root); 148327cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1484af01d2e5SJosef Bacik } 1485cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1486cb517eabSMiao Xie radix_tree_preload_end(); 1487cb517eabSMiao Xie 1488cb517eabSMiao Xie return ret; 1489cb517eabSMiao Xie } 1490cb517eabSMiao Xie 1491bd647ce3SJosef Bacik void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info) 1492bd647ce3SJosef Bacik { 1493bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 1494bd647ce3SJosef Bacik struct btrfs_root *root; 1495bd647ce3SJosef Bacik 1496bd647ce3SJosef Bacik while (!list_empty(&fs_info->allocated_roots)) { 1497bd647ce3SJosef Bacik root = list_first_entry(&fs_info->allocated_roots, 1498bd647ce3SJosef Bacik struct btrfs_root, leak_list); 1499bd647ce3SJosef Bacik btrfs_err(fs_info, "leaked root %llu-%llu refcount %d", 1500bd647ce3SJosef Bacik root->root_key.objectid, root->root_key.offset, 1501bd647ce3SJosef Bacik refcount_read(&root->refs)); 1502bd647ce3SJosef Bacik while (refcount_read(&root->refs) > 1) 150300246528SJosef Bacik btrfs_put_root(root); 150400246528SJosef Bacik btrfs_put_root(root); 1505bd647ce3SJosef Bacik } 1506bd647ce3SJosef Bacik #endif 1507bd647ce3SJosef Bacik } 1508bd647ce3SJosef Bacik 15090d4b0463SJosef Bacik void btrfs_free_fs_info(struct btrfs_fs_info *fs_info) 15100d4b0463SJosef Bacik { 1511141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 1512141386e1SJosef Bacik percpu_counter_destroy(&fs_info->delalloc_bytes); 1513141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dio_bytes); 1514141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dev_replace.bio_counter); 1515141386e1SJosef Bacik btrfs_free_csum_hash(fs_info); 1516141386e1SJosef Bacik btrfs_free_stripe_hash_table(fs_info); 1517141386e1SJosef Bacik btrfs_free_ref_cache(fs_info); 15180d4b0463SJosef Bacik kfree(fs_info->balance_ctl); 15190d4b0463SJosef Bacik kfree(fs_info->delayed_root); 152000246528SJosef Bacik btrfs_put_root(fs_info->extent_root); 152100246528SJosef Bacik btrfs_put_root(fs_info->tree_root); 152200246528SJosef Bacik btrfs_put_root(fs_info->chunk_root); 152300246528SJosef Bacik btrfs_put_root(fs_info->dev_root); 152400246528SJosef Bacik btrfs_put_root(fs_info->csum_root); 152500246528SJosef Bacik btrfs_put_root(fs_info->quota_root); 152600246528SJosef Bacik btrfs_put_root(fs_info->uuid_root); 152700246528SJosef Bacik btrfs_put_root(fs_info->free_space_root); 152800246528SJosef Bacik btrfs_put_root(fs_info->fs_root); 1529bd647ce3SJosef Bacik btrfs_check_leaked_roots(fs_info); 15303fd63727SJosef Bacik btrfs_extent_buffer_leak_debug_check(fs_info); 15310d4b0463SJosef Bacik kfree(fs_info->super_copy); 15320d4b0463SJosef Bacik kfree(fs_info->super_for_commit); 15330d4b0463SJosef Bacik kvfree(fs_info); 15340d4b0463SJosef Bacik } 15350d4b0463SJosef Bacik 15360d4b0463SJosef Bacik 1537c00869f1SMiao Xie struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 1538c00869f1SMiao Xie struct btrfs_key *location, 1539c00869f1SMiao Xie bool check_ref) 15405eda7b5eSChris Mason { 15415eda7b5eSChris Mason struct btrfs_root *root; 1542381cf658SDavid Sterba struct btrfs_path *path; 15431d4c08e0SDavid Sterba struct btrfs_key key; 15445eda7b5eSChris Mason int ret; 15455eda7b5eSChris Mason 1546edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 154700246528SJosef Bacik return btrfs_grab_root(fs_info->tree_root); 1548edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 154900246528SJosef Bacik return btrfs_grab_root(fs_info->extent_root); 15508f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 155100246528SJosef Bacik return btrfs_grab_root(fs_info->chunk_root); 15528f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 155300246528SJosef Bacik return btrfs_grab_root(fs_info->dev_root); 15540403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 155500246528SJosef Bacik return btrfs_grab_root(fs_info->csum_root); 1556bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 155700246528SJosef Bacik return btrfs_grab_root(fs_info->quota_root) ? 1558bc44d7c4SJosef Bacik fs_info->quota_root : ERR_PTR(-ENOENT); 1559f7a81ea4SStefan Behrens if (location->objectid == BTRFS_UUID_TREE_OBJECTID) 156000246528SJosef Bacik return btrfs_grab_root(fs_info->uuid_root) ? 1561bc44d7c4SJosef Bacik fs_info->uuid_root : ERR_PTR(-ENOENT); 156270f6d82eSOmar Sandoval if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 156300246528SJosef Bacik return btrfs_grab_root(fs_info->free_space_root) ? 1564bc44d7c4SJosef Bacik fs_info->free_space_root : ERR_PTR(-ENOENT); 15654df27c4dSYan, Zheng again: 1566cb517eabSMiao Xie root = btrfs_lookup_fs_root(fs_info, location->objectid); 156748475471SStefan Behrens if (root) { 1568bc44d7c4SJosef Bacik if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 156900246528SJosef Bacik btrfs_put_root(root); 157048475471SStefan Behrens return ERR_PTR(-ENOENT); 1571bc44d7c4SJosef Bacik } 15725eda7b5eSChris Mason return root; 157348475471SStefan Behrens } 15745eda7b5eSChris Mason 157583db2aadSJosef Bacik root = btrfs_read_tree_root(fs_info->tree_root, location); 15765eda7b5eSChris Mason if (IS_ERR(root)) 15775eda7b5eSChris Mason return root; 15783394e160SChris Mason 1579c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1580d68fc57bSYan, Zheng ret = -ENOENT; 1581d68fc57bSYan, Zheng goto fail; 1582d68fc57bSYan, Zheng } 1583d68fc57bSYan, Zheng 1584cb517eabSMiao Xie ret = btrfs_init_fs_root(root); 1585cb517eabSMiao Xie if (ret) 1586cb517eabSMiao Xie goto fail; 1587cb517eabSMiao Xie 1588381cf658SDavid Sterba path = btrfs_alloc_path(); 1589381cf658SDavid Sterba if (!path) { 1590381cf658SDavid Sterba ret = -ENOMEM; 1591381cf658SDavid Sterba goto fail; 1592381cf658SDavid Sterba } 15931d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 15941d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 15951d4c08e0SDavid Sterba key.offset = location->objectid; 15961d4c08e0SDavid Sterba 15971d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1598381cf658SDavid Sterba btrfs_free_path(path); 1599d68fc57bSYan, Zheng if (ret < 0) 1600d68fc57bSYan, Zheng goto fail; 1601d68fc57bSYan, Zheng if (ret == 0) 160227cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1603d68fc57bSYan, Zheng 1604cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 16050f7d52f4SChris Mason if (ret) { 160600246528SJosef Bacik btrfs_put_root(root); 16074785e24fSJosef Bacik if (ret == -EEXIST) 16084df27c4dSYan, Zheng goto again; 16094df27c4dSYan, Zheng goto fail; 16104df27c4dSYan, Zheng } 1611edbd8d4eSChris Mason return root; 16124df27c4dSYan, Zheng fail: 16138c38938cSJosef Bacik btrfs_put_root(root); 16144df27c4dSYan, Zheng return ERR_PTR(ret); 1615edbd8d4eSChris Mason } 1616edbd8d4eSChris Mason 161704160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 161804160088SChris Mason { 161904160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 162004160088SChris Mason int ret = 0; 162104160088SChris Mason struct btrfs_device *device; 162204160088SChris Mason struct backing_dev_info *bdi; 1623b7967db7SChris Mason 16241f78160cSXiao Guangrong rcu_read_lock(); 16251f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1626dfe25020SChris Mason if (!device->bdev) 1627dfe25020SChris Mason continue; 1628efa7c9f9SJan Kara bdi = device->bdev->bd_bdi; 1629ff9ea323STejun Heo if (bdi_congested(bdi, bdi_bits)) { 163004160088SChris Mason ret = 1; 163104160088SChris Mason break; 163204160088SChris Mason } 163304160088SChris Mason } 16341f78160cSXiao Guangrong rcu_read_unlock(); 163504160088SChris Mason return ret; 163604160088SChris Mason } 163704160088SChris Mason 16388b712842SChris Mason /* 16398b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16408b712842SChris Mason * functions. This is where read checksum verification actually happens 16418b712842SChris Mason */ 16428b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1643ce9adaa5SChris Mason { 1644ce9adaa5SChris Mason struct bio *bio; 164597eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1646ce9adaa5SChris Mason 164797eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1648ce9adaa5SChris Mason bio = end_io_wq->bio; 16498b712842SChris Mason 16504e4cbee9SChristoph Hellwig bio->bi_status = end_io_wq->status; 1651ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1652ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 16534246a0b6SChristoph Hellwig bio_endio(bio); 16549be490f1SOmar Sandoval kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 1655ce9adaa5SChris Mason } 165644b8bd7eSChris Mason 1657a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1658a74a4b97SChris Mason { 1659a74a4b97SChris Mason struct btrfs_root *root = arg; 16600b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1661d0278245SMiao Xie int again; 1662a74a4b97SChris Mason 1663d6fd0ae2SOmar Sandoval while (1) { 1664d0278245SMiao Xie again = 0; 16659d1a2a3aSDavid Sterba 1666fd340d0fSJosef Bacik set_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1667fd340d0fSJosef Bacik 1668d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 16692ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) 1670d0278245SMiao Xie goto sleep; 1671d0278245SMiao Xie 167290c711abSZygo Blaxell /* 167390c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 167490c711abSZygo Blaxell * before we have finished mounting the filesystem. 167590c711abSZygo Blaxell */ 16760b246afaSJeff Mahoney if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags)) 167790c711abSZygo Blaxell goto sleep; 167890c711abSZygo Blaxell 16790b246afaSJeff Mahoney if (!mutex_trylock(&fs_info->cleaner_mutex)) 1680d0278245SMiao Xie goto sleep; 1681d0278245SMiao Xie 1682dc7f370cSMiao Xie /* 1683dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1684dc7f370cSMiao Xie * during the above check and trylock. 1685dc7f370cSMiao Xie */ 16862ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) { 16870b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1688dc7f370cSMiao Xie goto sleep; 1689dc7f370cSMiao Xie } 1690dc7f370cSMiao Xie 16912ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 1692c2d6cb16SFilipe Manana 16939d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 16940b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1695a74a4b97SChris Mason 1696d0278245SMiao Xie /* 169705323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 169805323cd1SMiao Xie * needn't do anything special here. 1699d0278245SMiao Xie */ 17000b246afaSJeff Mahoney btrfs_run_defrag_inodes(fs_info); 170167c5e7d4SFilipe Manana 170267c5e7d4SFilipe Manana /* 170367c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 170467c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 170567c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 170667c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 170767c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 170867c5e7d4SFilipe Manana * unused block groups. 170967c5e7d4SFilipe Manana */ 17100b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 1711d0278245SMiao Xie sleep: 1712fd340d0fSJosef Bacik clear_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1713d6fd0ae2SOmar Sandoval if (kthread_should_park()) 1714d6fd0ae2SOmar Sandoval kthread_parkme(); 1715d6fd0ae2SOmar Sandoval if (kthread_should_stop()) 1716d6fd0ae2SOmar Sandoval return 0; 1717838fe188SJiri Kosina if (!again) { 1718a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 1719a74a4b97SChris Mason schedule(); 1720a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1721a74a4b97SChris Mason } 1722da288d28SFilipe Manana } 1723a74a4b97SChris Mason } 1724a74a4b97SChris Mason 1725a74a4b97SChris Mason static int transaction_kthread(void *arg) 1726a74a4b97SChris Mason { 1727a74a4b97SChris Mason struct btrfs_root *root = arg; 17280b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1729a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1730a74a4b97SChris Mason struct btrfs_transaction *cur; 17318929ecfaSYan, Zheng u64 transid; 1732a944442cSAllen Pais time64_t now; 1733a74a4b97SChris Mason unsigned long delay; 1734914b2007SJan Kara bool cannot_commit; 1735a74a4b97SChris Mason 1736a74a4b97SChris Mason do { 1737914b2007SJan Kara cannot_commit = false; 17380b246afaSJeff Mahoney delay = HZ * fs_info->commit_interval; 17390b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 1740a74a4b97SChris Mason 17410b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 17420b246afaSJeff Mahoney cur = fs_info->running_transaction; 1743a74a4b97SChris Mason if (!cur) { 17440b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1745a74a4b97SChris Mason goto sleep; 1746a74a4b97SChris Mason } 174731153d81SYan Zheng 1748afd48513SArnd Bergmann now = ktime_get_seconds(); 17493296bf56SQu Wenruo if (cur->state < TRANS_STATE_COMMIT_START && 1750a514d638SQu Wenruo !test_bit(BTRFS_FS_NEED_ASYNC_COMMIT, &fs_info->flags) && 17518b87dc17SDavid Sterba (now < cur->start_time || 17520b246afaSJeff Mahoney now - cur->start_time < fs_info->commit_interval)) { 17530b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1754a74a4b97SChris Mason delay = HZ * 5; 1755a74a4b97SChris Mason goto sleep; 1756a74a4b97SChris Mason } 17578929ecfaSYan, Zheng transid = cur->transid; 17580b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 175956bec294SChris Mason 176079787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1761354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1762914b2007SJan Kara if (IS_ERR(trans)) { 1763354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1764914b2007SJan Kara cannot_commit = true; 176579787eaaSJeff Mahoney goto sleep; 1766914b2007SJan Kara } 17678929ecfaSYan, Zheng if (transid == trans->transid) { 17683a45bb20SJeff Mahoney btrfs_commit_transaction(trans); 17698929ecfaSYan, Zheng } else { 17703a45bb20SJeff Mahoney btrfs_end_transaction(trans); 17718929ecfaSYan, Zheng } 1772a74a4b97SChris Mason sleep: 17730b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 17740b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 1775a74a4b97SChris Mason 17764e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 17770b246afaSJeff Mahoney &fs_info->fs_state))) 17782ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 17798929ecfaSYan, Zheng if (!kthread_should_stop() && 17800b246afaSJeff Mahoney (!btrfs_transaction_blocked(fs_info) || 1781914b2007SJan Kara cannot_commit)) 1782bc5511d0SNikolay Borisov schedule_timeout_interruptible(delay); 1783a74a4b97SChris Mason } while (!kthread_should_stop()); 1784a74a4b97SChris Mason return 0; 1785a74a4b97SChris Mason } 1786a74a4b97SChris Mason 1787af31f5e5SChris Mason /* 178801f0f9daSNikolay Borisov * This will find the highest generation in the array of root backups. The 178901f0f9daSNikolay Borisov * index of the highest array is returned, or -EINVAL if we can't find 179001f0f9daSNikolay Borisov * anything. 1791af31f5e5SChris Mason * 1792af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1793af31f5e5SChris Mason * generation of the latest root in the array with the generation 1794af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1795af31f5e5SChris Mason */ 179601f0f9daSNikolay Borisov static int find_newest_super_backup(struct btrfs_fs_info *info) 1797af31f5e5SChris Mason { 179801f0f9daSNikolay Borisov const u64 newest_gen = btrfs_super_generation(info->super_copy); 1799af31f5e5SChris Mason u64 cur; 1800af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1801af31f5e5SChris Mason int i; 1802af31f5e5SChris Mason 1803af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1804af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1805af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1806af31f5e5SChris Mason if (cur == newest_gen) 180701f0f9daSNikolay Borisov return i; 1808af31f5e5SChris Mason } 1809af31f5e5SChris Mason 181001f0f9daSNikolay Borisov return -EINVAL; 1811af31f5e5SChris Mason } 1812af31f5e5SChris Mason 1813af31f5e5SChris Mason /* 1814af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1815af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1816af31f5e5SChris Mason * done 1817af31f5e5SChris Mason */ 1818af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1819af31f5e5SChris Mason { 18206ef108ddSNikolay Borisov const int next_backup = info->backup_root_index; 1821af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1822af31f5e5SChris Mason 1823af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1824af31f5e5SChris Mason 1825af31f5e5SChris Mason /* 1826af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1827af31f5e5SChris Mason * regardless of which ones we use today 1828af31f5e5SChris Mason */ 1829af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1830af31f5e5SChris Mason 1831af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1832af31f5e5SChris Mason 1833af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1834af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1835af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1836af31f5e5SChris Mason 1837af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1838af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1839af31f5e5SChris Mason 1840af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1841af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1842af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1843af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1844af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1845af31f5e5SChris Mason 1846af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1847af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1848af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1849af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1850af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1851af31f5e5SChris Mason 18527c7e82a7SChris Mason /* 18537c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18547c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18557c7e82a7SChris Mason */ 18567c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18577c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18587c7e82a7SChris Mason info->fs_root->node->start); 1859af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1860af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1861af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1862af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18637c7e82a7SChris Mason } 1864af31f5e5SChris Mason 1865af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1866af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1867af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1868af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1869af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1870af31f5e5SChris Mason 1871af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1872af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1873af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1874af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1875af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1876af31f5e5SChris Mason 1877af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1878af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1879af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1880af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1881af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1882af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1883af31f5e5SChris Mason 1884af31f5e5SChris Mason /* 1885af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1886af31f5e5SChris Mason * for the next commit 1887af31f5e5SChris Mason */ 1888af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1889af31f5e5SChris Mason &info->super_for_commit->super_roots, 1890af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1891af31f5e5SChris Mason } 1892af31f5e5SChris Mason 1893af31f5e5SChris Mason /* 1894bd2336b2SNikolay Borisov * read_backup_root - Reads a backup root based on the passed priority. Prio 0 1895bd2336b2SNikolay Borisov * is the newest, prio 1/2/3 are 2nd newest/3rd newest/4th (oldest) backup roots 1896bd2336b2SNikolay Borisov * 1897bd2336b2SNikolay Borisov * fs_info - filesystem whose backup roots need to be read 1898bd2336b2SNikolay Borisov * priority - priority of backup root required 1899bd2336b2SNikolay Borisov * 1900bd2336b2SNikolay Borisov * Returns backup root index on success and -EINVAL otherwise. 1901bd2336b2SNikolay Borisov */ 1902bd2336b2SNikolay Borisov static int read_backup_root(struct btrfs_fs_info *fs_info, u8 priority) 1903bd2336b2SNikolay Borisov { 1904bd2336b2SNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 1905bd2336b2SNikolay Borisov struct btrfs_super_block *super = fs_info->super_copy; 1906bd2336b2SNikolay Borisov struct btrfs_root_backup *root_backup; 1907bd2336b2SNikolay Borisov 1908bd2336b2SNikolay Borisov if (priority < BTRFS_NUM_BACKUP_ROOTS && backup_index >= 0) { 1909bd2336b2SNikolay Borisov if (priority == 0) 1910bd2336b2SNikolay Borisov return backup_index; 1911bd2336b2SNikolay Borisov 1912bd2336b2SNikolay Borisov backup_index = backup_index + BTRFS_NUM_BACKUP_ROOTS - priority; 1913bd2336b2SNikolay Borisov backup_index %= BTRFS_NUM_BACKUP_ROOTS; 1914bd2336b2SNikolay Borisov } else { 1915bd2336b2SNikolay Borisov return -EINVAL; 1916bd2336b2SNikolay Borisov } 1917bd2336b2SNikolay Borisov 1918bd2336b2SNikolay Borisov root_backup = super->super_roots + backup_index; 1919bd2336b2SNikolay Borisov 1920bd2336b2SNikolay Borisov btrfs_set_super_generation(super, 1921bd2336b2SNikolay Borisov btrfs_backup_tree_root_gen(root_backup)); 1922bd2336b2SNikolay Borisov btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1923bd2336b2SNikolay Borisov btrfs_set_super_root_level(super, 1924bd2336b2SNikolay Borisov btrfs_backup_tree_root_level(root_backup)); 1925bd2336b2SNikolay Borisov btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1926bd2336b2SNikolay Borisov 1927bd2336b2SNikolay Borisov /* 1928bd2336b2SNikolay Borisov * Fixme: the total bytes and num_devices need to match or we should 1929bd2336b2SNikolay Borisov * need a fsck 1930bd2336b2SNikolay Borisov */ 1931bd2336b2SNikolay Borisov btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1932bd2336b2SNikolay Borisov btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1933bd2336b2SNikolay Borisov 1934bd2336b2SNikolay Borisov return backup_index; 1935bd2336b2SNikolay Borisov } 1936bd2336b2SNikolay Borisov 19377abadb64SLiu Bo /* helper to cleanup workers */ 19387abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 19397abadb64SLiu Bo { 1940dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 1941afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 19425cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 1943fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 1944fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 19458b110e39SMiao Xie btrfs_destroy_workqueue(fs_info->endio_repair_workers); 1946d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 1947fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 1948fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 19495b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 1950e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 1951736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 1952a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 1953fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 1954b0643e59SDennis Zhou if (fs_info->discard_ctl.discard_workers) 1955b0643e59SDennis Zhou destroy_workqueue(fs_info->discard_ctl.discard_workers); 1956a9b9477dSFilipe Manana /* 1957a9b9477dSFilipe Manana * Now that all other work queues are destroyed, we can safely destroy 1958a9b9477dSFilipe Manana * the queues used for metadata I/O, since tasks from those other work 1959a9b9477dSFilipe Manana * queues can do metadata I/O operations. 1960a9b9477dSFilipe Manana */ 1961a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_workers); 1962a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 19637abadb64SLiu Bo } 19647abadb64SLiu Bo 19652e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 19662e9f5954SRashika { 19672e9f5954SRashika if (root) { 19682e9f5954SRashika free_extent_buffer(root->node); 19692e9f5954SRashika free_extent_buffer(root->commit_root); 19702e9f5954SRashika root->node = NULL; 19712e9f5954SRashika root->commit_root = NULL; 19722e9f5954SRashika } 19732e9f5954SRashika } 19742e9f5954SRashika 1975af31f5e5SChris Mason /* helper to cleanup tree roots */ 19764273eaffSAnand Jain static void free_root_pointers(struct btrfs_fs_info *info, bool free_chunk_root) 1977af31f5e5SChris Mason { 19782e9f5954SRashika free_root_extent_buffers(info->tree_root); 1979655b09feSJosef Bacik 19802e9f5954SRashika free_root_extent_buffers(info->dev_root); 19812e9f5954SRashika free_root_extent_buffers(info->extent_root); 19822e9f5954SRashika free_root_extent_buffers(info->csum_root); 19832e9f5954SRashika free_root_extent_buffers(info->quota_root); 19842e9f5954SRashika free_root_extent_buffers(info->uuid_root); 19858c38938cSJosef Bacik free_root_extent_buffers(info->fs_root); 19864273eaffSAnand Jain if (free_chunk_root) 19872e9f5954SRashika free_root_extent_buffers(info->chunk_root); 198870f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 1989af31f5e5SChris Mason } 1990af31f5e5SChris Mason 19918c38938cSJosef Bacik void btrfs_put_root(struct btrfs_root *root) 19928c38938cSJosef Bacik { 19938c38938cSJosef Bacik if (!root) 19948c38938cSJosef Bacik return; 19958c38938cSJosef Bacik 19968c38938cSJosef Bacik if (refcount_dec_and_test(&root->refs)) { 19978c38938cSJosef Bacik WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 19988c38938cSJosef Bacik if (root->anon_dev) 19998c38938cSJosef Bacik free_anon_bdev(root->anon_dev); 20008c38938cSJosef Bacik btrfs_drew_lock_destroy(&root->snapshot_lock); 20018c38938cSJosef Bacik free_extent_buffer(root->node); 20028c38938cSJosef Bacik free_extent_buffer(root->commit_root); 20038c38938cSJosef Bacik kfree(root->free_ino_ctl); 20048c38938cSJosef Bacik kfree(root->free_ino_pinned); 20058c38938cSJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 20068c38938cSJosef Bacik spin_lock(&root->fs_info->fs_roots_radix_lock); 20078c38938cSJosef Bacik list_del_init(&root->leak_list); 20088c38938cSJosef Bacik spin_unlock(&root->fs_info->fs_roots_radix_lock); 20098c38938cSJosef Bacik #endif 20108c38938cSJosef Bacik kfree(root); 20118c38938cSJosef Bacik } 20128c38938cSJosef Bacik } 20138c38938cSJosef Bacik 2014faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 2015171f6537SJosef Bacik { 2016171f6537SJosef Bacik int ret; 2017171f6537SJosef Bacik struct btrfs_root *gang[8]; 2018171f6537SJosef Bacik int i; 2019171f6537SJosef Bacik 2020171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2021171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2022171f6537SJosef Bacik struct btrfs_root, root_list); 2023171f6537SJosef Bacik list_del(&gang[0]->root_list); 2024171f6537SJosef Bacik 20258c38938cSJosef Bacik if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) 2026cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 202700246528SJosef Bacik btrfs_put_root(gang[0]); 2028171f6537SJosef Bacik } 2029171f6537SJosef Bacik 2030171f6537SJosef Bacik while (1) { 2031171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2032171f6537SJosef Bacik (void **)gang, 0, 2033171f6537SJosef Bacik ARRAY_SIZE(gang)); 2034171f6537SJosef Bacik if (!ret) 2035171f6537SJosef Bacik break; 2036171f6537SJosef Bacik for (i = 0; i < ret; i++) 2037cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2038171f6537SJosef Bacik } 20391a4319ccSLiu Bo 2040fe119a6eSNikolay Borisov if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 20411a4319ccSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 2042171f6537SJosef Bacik } 2043af31f5e5SChris Mason 2044638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2045638aa7edSEric Sandeen { 2046638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2047638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2048638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2049638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2050638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2051638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2052ff09c4caSAnand Jain refcount_set(&fs_info->scrub_workers_refcnt, 0); 2053638aa7edSEric Sandeen } 2054638aa7edSEric Sandeen 2055779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2056779a65a4SEric Sandeen { 2057779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2058779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2059779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2060779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2061779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2062779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2063779a65a4SEric Sandeen } 2064779a65a4SEric Sandeen 20656bccf3abSJeff Mahoney static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info) 2066f37938e0SEric Sandeen { 20672ff7e61eSJeff Mahoney struct inode *inode = fs_info->btree_inode; 20682ff7e61eSJeff Mahoney 20692ff7e61eSJeff Mahoney inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 20702ff7e61eSJeff Mahoney set_nlink(inode, 1); 2071f37938e0SEric Sandeen /* 2072f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2073f37938e0SEric Sandeen * the real end of the address space is determined by all of 2074f37938e0SEric Sandeen * the devices in the system 2075f37938e0SEric Sandeen */ 20762ff7e61eSJeff Mahoney inode->i_size = OFFSET_MAX; 20772ff7e61eSJeff Mahoney inode->i_mapping->a_ops = &btree_aops; 2078f37938e0SEric Sandeen 20792ff7e61eSJeff Mahoney RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node); 208043eb5f29SQu Wenruo extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree, 208143eb5f29SQu Wenruo IO_TREE_INODE_IO, inode); 20827b439738SDavid Sterba BTRFS_I(inode)->io_tree.track_uptodate = false; 20832ff7e61eSJeff Mahoney extent_map_tree_init(&BTRFS_I(inode)->extent_tree); 2084f37938e0SEric Sandeen 20852ff7e61eSJeff Mahoney BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops; 2086f37938e0SEric Sandeen 20875c8fd99fSJosef Bacik BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root); 20882ff7e61eSJeff Mahoney memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key)); 20892ff7e61eSJeff Mahoney set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags); 20902ff7e61eSJeff Mahoney btrfs_insert_inode_hash(inode); 2091f37938e0SEric Sandeen } 2092f37938e0SEric Sandeen 2093ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2094ad618368SEric Sandeen { 2095ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2096129827e3SDavid Sterba init_rwsem(&fs_info->dev_replace.rwsem); 20977f8d236aSDavid Sterba init_waitqueue_head(&fs_info->dev_replace.replace_wait); 2098ad618368SEric Sandeen } 2099ad618368SEric Sandeen 2100f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2101f9e92e40SEric Sandeen { 2102f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2103f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2104f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2105f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2106f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2107f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2108d2c609b8SJeff Mahoney fs_info->qgroup_rescan_running = false; 2109f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2110f9e92e40SEric Sandeen } 2111f9e92e40SEric Sandeen 21122a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 21132a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 21142a458198SEric Sandeen { 2115f7b885beSAnand Jain u32 max_active = fs_info->thread_pool_size; 21166f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 21172a458198SEric Sandeen 21182a458198SEric Sandeen fs_info->workers = 2119cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2120cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 21212a458198SEric Sandeen 21222a458198SEric Sandeen fs_info->delalloc_workers = 2123cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2124cb001095SJeff Mahoney flags, max_active, 2); 21252a458198SEric Sandeen 21262a458198SEric Sandeen fs_info->flush_workers = 2127cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2128cb001095SJeff Mahoney flags, max_active, 0); 21292a458198SEric Sandeen 21302a458198SEric Sandeen fs_info->caching_workers = 2131cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 21322a458198SEric Sandeen 21332a458198SEric Sandeen fs_info->fixup_workers = 2134cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 21352a458198SEric Sandeen 21362a458198SEric Sandeen /* 21372a458198SEric Sandeen * endios are largely parallel and should have a very 21382a458198SEric Sandeen * low idle thresh 21392a458198SEric Sandeen */ 21402a458198SEric Sandeen fs_info->endio_workers = 2141cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 21422a458198SEric Sandeen fs_info->endio_meta_workers = 2143cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2144cb001095SJeff Mahoney max_active, 4); 21452a458198SEric Sandeen fs_info->endio_meta_write_workers = 2146cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2147cb001095SJeff Mahoney max_active, 2); 21482a458198SEric Sandeen fs_info->endio_raid56_workers = 2149cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2150cb001095SJeff Mahoney max_active, 4); 21512a458198SEric Sandeen fs_info->endio_repair_workers = 2152cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); 21532a458198SEric Sandeen fs_info->rmw_workers = 2154cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 21552a458198SEric Sandeen fs_info->endio_write_workers = 2156cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2157cb001095SJeff Mahoney max_active, 2); 21582a458198SEric Sandeen fs_info->endio_freespace_worker = 2159cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2160cb001095SJeff Mahoney max_active, 0); 21612a458198SEric Sandeen fs_info->delayed_workers = 2162cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2163cb001095SJeff Mahoney max_active, 0); 21642a458198SEric Sandeen fs_info->readahead_workers = 2165cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2166cb001095SJeff Mahoney max_active, 2); 21672a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2168cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 2169b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers = 2170b0643e59SDennis Zhou alloc_workqueue("btrfs_discard", WQ_UNBOUND | WQ_FREEZABLE, 1); 21712a458198SEric Sandeen 21722a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 2173ba8a9d07SChris Mason fs_info->flush_workers && 21742a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 21752a458198SEric Sandeen fs_info->endio_meta_write_workers && 21762a458198SEric Sandeen fs_info->endio_repair_workers && 21772a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 21782a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 21792a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 21802a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 2181b0643e59SDennis Zhou fs_info->qgroup_rescan_workers && 2182b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers)) { 21832a458198SEric Sandeen return -ENOMEM; 21842a458198SEric Sandeen } 21852a458198SEric Sandeen 21862a458198SEric Sandeen return 0; 21872a458198SEric Sandeen } 21882a458198SEric Sandeen 21896d97c6e3SJohannes Thumshirn static int btrfs_init_csum_hash(struct btrfs_fs_info *fs_info, u16 csum_type) 21906d97c6e3SJohannes Thumshirn { 21916d97c6e3SJohannes Thumshirn struct crypto_shash *csum_shash; 2192b4e967beSDavid Sterba const char *csum_driver = btrfs_super_csum_driver(csum_type); 21936d97c6e3SJohannes Thumshirn 2194b4e967beSDavid Sterba csum_shash = crypto_alloc_shash(csum_driver, 0, 0); 21956d97c6e3SJohannes Thumshirn 21966d97c6e3SJohannes Thumshirn if (IS_ERR(csum_shash)) { 21976d97c6e3SJohannes Thumshirn btrfs_err(fs_info, "error allocating %s hash for checksum", 2198b4e967beSDavid Sterba csum_driver); 21996d97c6e3SJohannes Thumshirn return PTR_ERR(csum_shash); 22006d97c6e3SJohannes Thumshirn } 22016d97c6e3SJohannes Thumshirn 22026d97c6e3SJohannes Thumshirn fs_info->csum_shash = csum_shash; 22036d97c6e3SJohannes Thumshirn 22046d97c6e3SJohannes Thumshirn return 0; 22056d97c6e3SJohannes Thumshirn } 22066d97c6e3SJohannes Thumshirn 220763443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 220863443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 220963443bf5SEric Sandeen { 221063443bf5SEric Sandeen int ret; 221163443bf5SEric Sandeen struct btrfs_root *log_tree_root; 221263443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 221363443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 2214581c1760SQu Wenruo int level = btrfs_super_log_root_level(disk_super); 221563443bf5SEric Sandeen 221663443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2217f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 221863443bf5SEric Sandeen return -EIO; 221963443bf5SEric Sandeen } 222063443bf5SEric Sandeen 222196dfcb46SJosef Bacik log_tree_root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, 222296dfcb46SJosef Bacik GFP_KERNEL); 222363443bf5SEric Sandeen if (!log_tree_root) 222463443bf5SEric Sandeen return -ENOMEM; 222563443bf5SEric Sandeen 22262ff7e61eSJeff Mahoney log_tree_root->node = read_tree_block(fs_info, bytenr, 2227581c1760SQu Wenruo fs_info->generation + 1, 2228581c1760SQu Wenruo level, NULL); 222964c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2230f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 22310eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 22328c38938cSJosef Bacik log_tree_root->node = NULL; 223300246528SJosef Bacik btrfs_put_root(log_tree_root); 22340eeff236SLiu Bo return ret; 223564c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2236f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 223700246528SJosef Bacik btrfs_put_root(log_tree_root); 223863443bf5SEric Sandeen return -EIO; 223963443bf5SEric Sandeen } 224063443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 224163443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 224263443bf5SEric Sandeen if (ret) { 22430b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 224463443bf5SEric Sandeen "Failed to recover log tree"); 224500246528SJosef Bacik btrfs_put_root(log_tree_root); 224663443bf5SEric Sandeen return ret; 224763443bf5SEric Sandeen } 224863443bf5SEric Sandeen 2249bc98a42cSDavid Howells if (sb_rdonly(fs_info->sb)) { 22506bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 225163443bf5SEric Sandeen if (ret) 225263443bf5SEric Sandeen return ret; 225363443bf5SEric Sandeen } 225463443bf5SEric Sandeen 225563443bf5SEric Sandeen return 0; 225663443bf5SEric Sandeen } 225763443bf5SEric Sandeen 22586bccf3abSJeff Mahoney static int btrfs_read_roots(struct btrfs_fs_info *fs_info) 22594bbcaa64SEric Sandeen { 22606bccf3abSJeff Mahoney struct btrfs_root *tree_root = fs_info->tree_root; 2261a4f3d2c4SDavid Sterba struct btrfs_root *root; 22624bbcaa64SEric Sandeen struct btrfs_key location; 22634bbcaa64SEric Sandeen int ret; 22644bbcaa64SEric Sandeen 22656bccf3abSJeff Mahoney BUG_ON(!fs_info->tree_root); 22666bccf3abSJeff Mahoney 22674bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 22684bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 22694bbcaa64SEric Sandeen location.offset = 0; 22704bbcaa64SEric Sandeen 2271a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2272f50f4353SLiu Bo if (IS_ERR(root)) { 2273f50f4353SLiu Bo ret = PTR_ERR(root); 2274f50f4353SLiu Bo goto out; 2275f50f4353SLiu Bo } 2276a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2277a4f3d2c4SDavid Sterba fs_info->extent_root = root; 22784bbcaa64SEric Sandeen 22794bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2280a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2281f50f4353SLiu Bo if (IS_ERR(root)) { 2282f50f4353SLiu Bo ret = PTR_ERR(root); 2283f50f4353SLiu Bo goto out; 2284f50f4353SLiu Bo } 2285a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2286a4f3d2c4SDavid Sterba fs_info->dev_root = root; 22874bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 22884bbcaa64SEric Sandeen 22894bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2290a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2291f50f4353SLiu Bo if (IS_ERR(root)) { 2292f50f4353SLiu Bo ret = PTR_ERR(root); 2293f50f4353SLiu Bo goto out; 2294f50f4353SLiu Bo } 2295a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2296a4f3d2c4SDavid Sterba fs_info->csum_root = root; 22974bbcaa64SEric Sandeen 22984bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2299a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2300a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2301a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2302afcdd129SJosef Bacik set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); 2303a4f3d2c4SDavid Sterba fs_info->quota_root = root; 23044bbcaa64SEric Sandeen } 23054bbcaa64SEric Sandeen 23064bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2307a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2308a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2309a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 23104bbcaa64SEric Sandeen if (ret != -ENOENT) 2311f50f4353SLiu Bo goto out; 23124bbcaa64SEric Sandeen } else { 2313a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2314a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 23154bbcaa64SEric Sandeen } 23164bbcaa64SEric Sandeen 231770f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 231870f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 231970f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 2320f50f4353SLiu Bo if (IS_ERR(root)) { 2321f50f4353SLiu Bo ret = PTR_ERR(root); 2322f50f4353SLiu Bo goto out; 2323f50f4353SLiu Bo } 232470f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 232570f6d82eSOmar Sandoval fs_info->free_space_root = root; 232670f6d82eSOmar Sandoval } 232770f6d82eSOmar Sandoval 23284bbcaa64SEric Sandeen return 0; 2329f50f4353SLiu Bo out: 2330f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read root (objectid=%llu): %d", 2331f50f4353SLiu Bo location.objectid, ret); 2332f50f4353SLiu Bo return ret; 23334bbcaa64SEric Sandeen } 23344bbcaa64SEric Sandeen 2335069ec957SQu Wenruo /* 2336069ec957SQu Wenruo * Real super block validation 2337069ec957SQu Wenruo * NOTE: super csum type and incompat features will not be checked here. 2338069ec957SQu Wenruo * 2339069ec957SQu Wenruo * @sb: super block to check 2340069ec957SQu Wenruo * @mirror_num: the super block number to check its bytenr: 2341069ec957SQu Wenruo * 0 the primary (1st) sb 2342069ec957SQu Wenruo * 1, 2 2nd and 3rd backup copy 2343069ec957SQu Wenruo * -1 skip bytenr check 2344069ec957SQu Wenruo */ 2345069ec957SQu Wenruo static int validate_super(struct btrfs_fs_info *fs_info, 2346069ec957SQu Wenruo struct btrfs_super_block *sb, int mirror_num) 234721a852b0SQu Wenruo { 234821a852b0SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 234921a852b0SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 235021a852b0SQu Wenruo int ret = 0; 235121a852b0SQu Wenruo 235221a852b0SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 235321a852b0SQu Wenruo btrfs_err(fs_info, "no valid FS found"); 235421a852b0SQu Wenruo ret = -EINVAL; 235521a852b0SQu Wenruo } 235621a852b0SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) { 235721a852b0SQu Wenruo btrfs_err(fs_info, "unrecognized or unsupported super flag: %llu", 235821a852b0SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 235921a852b0SQu Wenruo ret = -EINVAL; 236021a852b0SQu Wenruo } 236121a852b0SQu Wenruo if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 236221a852b0SQu Wenruo btrfs_err(fs_info, "tree_root level too big: %d >= %d", 236321a852b0SQu Wenruo btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 236421a852b0SQu Wenruo ret = -EINVAL; 236521a852b0SQu Wenruo } 236621a852b0SQu Wenruo if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 236721a852b0SQu Wenruo btrfs_err(fs_info, "chunk_root level too big: %d >= %d", 236821a852b0SQu Wenruo btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 236921a852b0SQu Wenruo ret = -EINVAL; 237021a852b0SQu Wenruo } 237121a852b0SQu Wenruo if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 237221a852b0SQu Wenruo btrfs_err(fs_info, "log_root level too big: %d >= %d", 237321a852b0SQu Wenruo btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 237421a852b0SQu Wenruo ret = -EINVAL; 237521a852b0SQu Wenruo } 237621a852b0SQu Wenruo 237721a852b0SQu Wenruo /* 237821a852b0SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 237921a852b0SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 238021a852b0SQu Wenruo */ 238121a852b0SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 238221a852b0SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 238321a852b0SQu Wenruo btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); 238421a852b0SQu Wenruo ret = -EINVAL; 238521a852b0SQu Wenruo } 238621a852b0SQu Wenruo /* Only PAGE SIZE is supported yet */ 238721a852b0SQu Wenruo if (sectorsize != PAGE_SIZE) { 238821a852b0SQu Wenruo btrfs_err(fs_info, 238921a852b0SQu Wenruo "sectorsize %llu not supported yet, only support %lu", 239021a852b0SQu Wenruo sectorsize, PAGE_SIZE); 239121a852b0SQu Wenruo ret = -EINVAL; 239221a852b0SQu Wenruo } 239321a852b0SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 239421a852b0SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 239521a852b0SQu Wenruo btrfs_err(fs_info, "invalid nodesize %llu", nodesize); 239621a852b0SQu Wenruo ret = -EINVAL; 239721a852b0SQu Wenruo } 239821a852b0SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 239921a852b0SQu Wenruo btrfs_err(fs_info, "invalid leafsize %u, should be %llu", 240021a852b0SQu Wenruo le32_to_cpu(sb->__unused_leafsize), nodesize); 240121a852b0SQu Wenruo ret = -EINVAL; 240221a852b0SQu Wenruo } 240321a852b0SQu Wenruo 240421a852b0SQu Wenruo /* Root alignment check */ 240521a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 240621a852b0SQu Wenruo btrfs_warn(fs_info, "tree_root block unaligned: %llu", 240721a852b0SQu Wenruo btrfs_super_root(sb)); 240821a852b0SQu Wenruo ret = -EINVAL; 240921a852b0SQu Wenruo } 241021a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 241121a852b0SQu Wenruo btrfs_warn(fs_info, "chunk_root block unaligned: %llu", 241221a852b0SQu Wenruo btrfs_super_chunk_root(sb)); 241321a852b0SQu Wenruo ret = -EINVAL; 241421a852b0SQu Wenruo } 241521a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 241621a852b0SQu Wenruo btrfs_warn(fs_info, "log_root block unaligned: %llu", 241721a852b0SQu Wenruo btrfs_super_log_root(sb)); 241821a852b0SQu Wenruo ret = -EINVAL; 241921a852b0SQu Wenruo } 242021a852b0SQu Wenruo 2421de37aa51SNikolay Borisov if (memcmp(fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid, 24227239ff4bSNikolay Borisov BTRFS_FSID_SIZE) != 0) { 242321a852b0SQu Wenruo btrfs_err(fs_info, 24247239ff4bSNikolay Borisov "dev_item UUID does not match metadata fsid: %pU != %pU", 2425de37aa51SNikolay Borisov fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid); 242621a852b0SQu Wenruo ret = -EINVAL; 242721a852b0SQu Wenruo } 242821a852b0SQu Wenruo 242921a852b0SQu Wenruo /* 243021a852b0SQu Wenruo * Hint to catch really bogus numbers, bitflips or so, more exact checks are 243121a852b0SQu Wenruo * done later 243221a852b0SQu Wenruo */ 243321a852b0SQu Wenruo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 243421a852b0SQu Wenruo btrfs_err(fs_info, "bytes_used is too small %llu", 243521a852b0SQu Wenruo btrfs_super_bytes_used(sb)); 243621a852b0SQu Wenruo ret = -EINVAL; 243721a852b0SQu Wenruo } 243821a852b0SQu Wenruo if (!is_power_of_2(btrfs_super_stripesize(sb))) { 243921a852b0SQu Wenruo btrfs_err(fs_info, "invalid stripesize %u", 244021a852b0SQu Wenruo btrfs_super_stripesize(sb)); 244121a852b0SQu Wenruo ret = -EINVAL; 244221a852b0SQu Wenruo } 244321a852b0SQu Wenruo if (btrfs_super_num_devices(sb) > (1UL << 31)) 244421a852b0SQu Wenruo btrfs_warn(fs_info, "suspicious number of devices: %llu", 244521a852b0SQu Wenruo btrfs_super_num_devices(sb)); 244621a852b0SQu Wenruo if (btrfs_super_num_devices(sb) == 0) { 244721a852b0SQu Wenruo btrfs_err(fs_info, "number of devices is 0"); 244821a852b0SQu Wenruo ret = -EINVAL; 244921a852b0SQu Wenruo } 245021a852b0SQu Wenruo 2451069ec957SQu Wenruo if (mirror_num >= 0 && 2452069ec957SQu Wenruo btrfs_super_bytenr(sb) != btrfs_sb_offset(mirror_num)) { 245321a852b0SQu Wenruo btrfs_err(fs_info, "super offset mismatch %llu != %u", 245421a852b0SQu Wenruo btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 245521a852b0SQu Wenruo ret = -EINVAL; 245621a852b0SQu Wenruo } 245721a852b0SQu Wenruo 245821a852b0SQu Wenruo /* 245921a852b0SQu Wenruo * Obvious sys_chunk_array corruptions, it must hold at least one key 246021a852b0SQu Wenruo * and one chunk 246121a852b0SQu Wenruo */ 246221a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 246321a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too big %u > %u", 246421a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 246521a852b0SQu Wenruo BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 246621a852b0SQu Wenruo ret = -EINVAL; 246721a852b0SQu Wenruo } 246821a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 246921a852b0SQu Wenruo + sizeof(struct btrfs_chunk)) { 247021a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too small %u < %zu", 247121a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 247221a852b0SQu Wenruo sizeof(struct btrfs_disk_key) 247321a852b0SQu Wenruo + sizeof(struct btrfs_chunk)); 247421a852b0SQu Wenruo ret = -EINVAL; 247521a852b0SQu Wenruo } 247621a852b0SQu Wenruo 247721a852b0SQu Wenruo /* 247821a852b0SQu Wenruo * The generation is a global counter, we'll trust it more than the others 247921a852b0SQu Wenruo * but it's still possible that it's the one that's wrong. 248021a852b0SQu Wenruo */ 248121a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 248221a852b0SQu Wenruo btrfs_warn(fs_info, 248321a852b0SQu Wenruo "suspicious: generation < chunk_root_generation: %llu < %llu", 248421a852b0SQu Wenruo btrfs_super_generation(sb), 248521a852b0SQu Wenruo btrfs_super_chunk_root_generation(sb)); 248621a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 248721a852b0SQu Wenruo && btrfs_super_cache_generation(sb) != (u64)-1) 248821a852b0SQu Wenruo btrfs_warn(fs_info, 248921a852b0SQu Wenruo "suspicious: generation < cache_generation: %llu < %llu", 249021a852b0SQu Wenruo btrfs_super_generation(sb), 249121a852b0SQu Wenruo btrfs_super_cache_generation(sb)); 249221a852b0SQu Wenruo 249321a852b0SQu Wenruo return ret; 249421a852b0SQu Wenruo } 249521a852b0SQu Wenruo 2496069ec957SQu Wenruo /* 2497069ec957SQu Wenruo * Validation of super block at mount time. 2498069ec957SQu Wenruo * Some checks already done early at mount time, like csum type and incompat 2499069ec957SQu Wenruo * flags will be skipped. 2500069ec957SQu Wenruo */ 2501069ec957SQu Wenruo static int btrfs_validate_mount_super(struct btrfs_fs_info *fs_info) 2502069ec957SQu Wenruo { 2503069ec957SQu Wenruo return validate_super(fs_info, fs_info->super_copy, 0); 2504069ec957SQu Wenruo } 2505069ec957SQu Wenruo 250675cb857dSQu Wenruo /* 250775cb857dSQu Wenruo * Validation of super block at write time. 250875cb857dSQu Wenruo * Some checks like bytenr check will be skipped as their values will be 250975cb857dSQu Wenruo * overwritten soon. 251075cb857dSQu Wenruo * Extra checks like csum type and incompat flags will be done here. 251175cb857dSQu Wenruo */ 251275cb857dSQu Wenruo static int btrfs_validate_write_super(struct btrfs_fs_info *fs_info, 251375cb857dSQu Wenruo struct btrfs_super_block *sb) 251475cb857dSQu Wenruo { 251575cb857dSQu Wenruo int ret; 251675cb857dSQu Wenruo 251775cb857dSQu Wenruo ret = validate_super(fs_info, sb, -1); 251875cb857dSQu Wenruo if (ret < 0) 251975cb857dSQu Wenruo goto out; 2520e7e16f48SJohannes Thumshirn if (!btrfs_supported_super_csum(btrfs_super_csum_type(sb))) { 252175cb857dSQu Wenruo ret = -EUCLEAN; 252275cb857dSQu Wenruo btrfs_err(fs_info, "invalid csum type, has %u want %u", 252375cb857dSQu Wenruo btrfs_super_csum_type(sb), BTRFS_CSUM_TYPE_CRC32); 252475cb857dSQu Wenruo goto out; 252575cb857dSQu Wenruo } 252675cb857dSQu Wenruo if (btrfs_super_incompat_flags(sb) & ~BTRFS_FEATURE_INCOMPAT_SUPP) { 252775cb857dSQu Wenruo ret = -EUCLEAN; 252875cb857dSQu Wenruo btrfs_err(fs_info, 252975cb857dSQu Wenruo "invalid incompat flags, has 0x%llx valid mask 0x%llx", 253075cb857dSQu Wenruo btrfs_super_incompat_flags(sb), 253175cb857dSQu Wenruo (unsigned long long)BTRFS_FEATURE_INCOMPAT_SUPP); 253275cb857dSQu Wenruo goto out; 253375cb857dSQu Wenruo } 253475cb857dSQu Wenruo out: 253575cb857dSQu Wenruo if (ret < 0) 253675cb857dSQu Wenruo btrfs_err(fs_info, 253775cb857dSQu Wenruo "super block corruption detected before writing it to disk"); 253875cb857dSQu Wenruo return ret; 253975cb857dSQu Wenruo } 254075cb857dSQu Wenruo 25416ef108ddSNikolay Borisov static int __cold init_tree_roots(struct btrfs_fs_info *fs_info) 2542b8522a1eSNikolay Borisov { 25436ef108ddSNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 2544b8522a1eSNikolay Borisov struct btrfs_super_block *sb = fs_info->super_copy; 2545b8522a1eSNikolay Borisov struct btrfs_root *tree_root = fs_info->tree_root; 2546b8522a1eSNikolay Borisov bool handle_error = false; 2547b8522a1eSNikolay Borisov int ret = 0; 2548b8522a1eSNikolay Borisov int i; 2549b8522a1eSNikolay Borisov 2550b8522a1eSNikolay Borisov for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 2551b8522a1eSNikolay Borisov u64 generation; 2552b8522a1eSNikolay Borisov int level; 2553b8522a1eSNikolay Borisov 2554b8522a1eSNikolay Borisov if (handle_error) { 2555b8522a1eSNikolay Borisov if (!IS_ERR(tree_root->node)) 2556b8522a1eSNikolay Borisov free_extent_buffer(tree_root->node); 2557b8522a1eSNikolay Borisov tree_root->node = NULL; 2558b8522a1eSNikolay Borisov 2559b8522a1eSNikolay Borisov if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) 2560b8522a1eSNikolay Borisov break; 2561b8522a1eSNikolay Borisov 2562b8522a1eSNikolay Borisov free_root_pointers(fs_info, 0); 2563b8522a1eSNikolay Borisov 2564b8522a1eSNikolay Borisov /* 2565b8522a1eSNikolay Borisov * Don't use the log in recovery mode, it won't be 2566b8522a1eSNikolay Borisov * valid 2567b8522a1eSNikolay Borisov */ 2568b8522a1eSNikolay Borisov btrfs_set_super_log_root(sb, 0); 2569b8522a1eSNikolay Borisov 2570b8522a1eSNikolay Borisov /* We can't trust the free space cache either */ 2571b8522a1eSNikolay Borisov btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2572b8522a1eSNikolay Borisov 2573b8522a1eSNikolay Borisov ret = read_backup_root(fs_info, i); 25746ef108ddSNikolay Borisov backup_index = ret; 2575b8522a1eSNikolay Borisov if (ret < 0) 2576b8522a1eSNikolay Borisov return ret; 2577b8522a1eSNikolay Borisov } 2578b8522a1eSNikolay Borisov generation = btrfs_super_generation(sb); 2579b8522a1eSNikolay Borisov level = btrfs_super_root_level(sb); 2580b8522a1eSNikolay Borisov tree_root->node = read_tree_block(fs_info, btrfs_super_root(sb), 2581b8522a1eSNikolay Borisov generation, level, NULL); 2582b8522a1eSNikolay Borisov if (IS_ERR(tree_root->node) || 2583b8522a1eSNikolay Borisov !extent_buffer_uptodate(tree_root->node)) { 2584b8522a1eSNikolay Borisov handle_error = true; 2585b8522a1eSNikolay Borisov 2586b8522a1eSNikolay Borisov if (IS_ERR(tree_root->node)) 2587b8522a1eSNikolay Borisov ret = PTR_ERR(tree_root->node); 2588b8522a1eSNikolay Borisov else if (!extent_buffer_uptodate(tree_root->node)) 2589b8522a1eSNikolay Borisov ret = -EUCLEAN; 2590b8522a1eSNikolay Borisov 2591b8522a1eSNikolay Borisov btrfs_warn(fs_info, "failed to read tree root"); 2592b8522a1eSNikolay Borisov continue; 2593b8522a1eSNikolay Borisov } 2594b8522a1eSNikolay Borisov 2595b8522a1eSNikolay Borisov btrfs_set_root_node(&tree_root->root_item, tree_root->node); 2596b8522a1eSNikolay Borisov tree_root->commit_root = btrfs_root_node(tree_root); 2597b8522a1eSNikolay Borisov btrfs_set_root_refs(&tree_root->root_item, 1); 2598b8522a1eSNikolay Borisov 2599336a0d8dSNikolay Borisov /* 2600336a0d8dSNikolay Borisov * No need to hold btrfs_root::objectid_mutex since the fs 2601336a0d8dSNikolay Borisov * hasn't been fully initialised and we are the only user 2602336a0d8dSNikolay Borisov */ 2603b8522a1eSNikolay Borisov ret = btrfs_find_highest_objectid(tree_root, 2604b8522a1eSNikolay Borisov &tree_root->highest_objectid); 2605b8522a1eSNikolay Borisov if (ret < 0) { 2606b8522a1eSNikolay Borisov handle_error = true; 2607b8522a1eSNikolay Borisov continue; 2608b8522a1eSNikolay Borisov } 2609b8522a1eSNikolay Borisov 2610b8522a1eSNikolay Borisov ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2611b8522a1eSNikolay Borisov 2612b8522a1eSNikolay Borisov ret = btrfs_read_roots(fs_info); 2613b8522a1eSNikolay Borisov if (ret < 0) { 2614b8522a1eSNikolay Borisov handle_error = true; 2615b8522a1eSNikolay Borisov continue; 2616b8522a1eSNikolay Borisov } 2617b8522a1eSNikolay Borisov 2618b8522a1eSNikolay Borisov /* All successful */ 2619b8522a1eSNikolay Borisov fs_info->generation = generation; 2620b8522a1eSNikolay Borisov fs_info->last_trans_committed = generation; 26216ef108ddSNikolay Borisov 26226ef108ddSNikolay Borisov /* Always begin writing backup roots after the one being used */ 26236ef108ddSNikolay Borisov if (backup_index < 0) { 26246ef108ddSNikolay Borisov fs_info->backup_root_index = 0; 26256ef108ddSNikolay Borisov } else { 26266ef108ddSNikolay Borisov fs_info->backup_root_index = backup_index + 1; 26276ef108ddSNikolay Borisov fs_info->backup_root_index %= BTRFS_NUM_BACKUP_ROOTS; 26286ef108ddSNikolay Borisov } 2629b8522a1eSNikolay Borisov break; 2630b8522a1eSNikolay Borisov } 2631b8522a1eSNikolay Borisov 2632b8522a1eSNikolay Borisov return ret; 2633b8522a1eSNikolay Borisov } 2634b8522a1eSNikolay Borisov 26358260edbaSJosef Bacik void btrfs_init_fs_info(struct btrfs_fs_info *fs_info) 2636eb60ceacSChris Mason { 263776dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2638f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 26398fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2640facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 264124bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2642eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 264311833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2644eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2645a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 264676dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 264724bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 26484cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 2649ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2650f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 265147ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2652f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2653d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 265467c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 26557585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2656573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2657de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 265819c00ddcSChris Mason 26590b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 26606324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2661f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 266247ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 2663bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 2664bd647ce3SJosef Bacik INIT_LIST_HEAD(&fs_info->allocated_roots); 26653fd63727SJosef Bacik INIT_LIST_HEAD(&fs_info->allocated_ebs); 26663fd63727SJosef Bacik spin_lock_init(&fs_info->eb_leak_lock); 2667bd647ce3SJosef Bacik #endif 2668c8bf1b67SDavid Sterba extent_map_tree_init(&fs_info->mapping_tree); 266966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 267066d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 267166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 267266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 267366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 267466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 267566d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2676ba2c4d4eSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_refs_rsv, 2677ba2c4d4eSJosef Bacik BTRFS_BLOCK_RSV_DELREFS); 2678ba2c4d4eSJosef Bacik 2679771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 26804cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 26812fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2682034f784dSJosef Bacik atomic_set(&fs_info->nr_delayed_iputs, 0); 2683fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 268495ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 26859ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 26864cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2687a5ed45f8SNikolay Borisov atomic64_set(&fs_info->free_chunk_space, 0); 2688f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 26898b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2690f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 269190519d66SArne Jansen /* readahead state */ 2692d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 269390519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2694fd708b81SJosef Bacik btrfs_init_ref_verify(fs_info); 2695c8b97818SChris Mason 2696b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2697b34b086cSChris Mason num_online_cpus() + 2, 8); 26980afbaf8cSChris Mason 2699199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2700199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 270169fe2d75SJosef Bacik 2702638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 270321adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 270421adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 270521adbd5cSStefan Behrens #endif 2706779a65a4SEric Sandeen btrfs_init_balance(fs_info); 270721c7e756SMiao Xie btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); 2708a2de733cSArne Jansen 27090f9dd46cSJosef Bacik spin_lock_init(&fs_info->block_group_cache_lock); 27106bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2711a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 27120f9dd46cSJosef Bacik 2713fe119a6eSNikolay Borisov extent_io_tree_init(fs_info, &fs_info->excluded_extents, 2714fe119a6eSNikolay Borisov IO_TREE_FS_EXCLUDED_EXTENTS, NULL); 2715afcdd129SJosef Bacik set_bit(BTRFS_FS_BARRIER, &fs_info->flags); 271639279cc3SChris Mason 27175a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 2718e02119d5SChris Mason mutex_init(&fs_info->tree_log_mutex); 2719925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2720a74a4b97SChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2721a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 27221bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 27239e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2724c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 272576dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2726803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2727fa9c0d79SChris Mason 2728ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2729f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2730b0643e59SDennis Zhou btrfs_discard_init(fs_info); 2731416ac51dSArne Jansen 2732fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2733fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2734fa9c0d79SChris Mason 2735e6dcd2dcSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 2736f9295749SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2737bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 27384854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 2739034f784dSJosef Bacik init_waitqueue_head(&fs_info->delayed_iputs_wait); 27403768f368SChris Mason 2741da17066cSJeff Mahoney /* Usable values until the real ones are cached from the superblock */ 2742da17066cSJeff Mahoney fs_info->nodesize = 4096; 2743da17066cSJeff Mahoney fs_info->sectorsize = 4096; 2744da17066cSJeff Mahoney fs_info->stripesize = 4096; 2745da17066cSJeff Mahoney 2746eede2bf3SOmar Sandoval spin_lock_init(&fs_info->swapfile_pins_lock); 2747eede2bf3SOmar Sandoval fs_info->swapfile_pins = RB_ROOT; 2748eede2bf3SOmar Sandoval 27499e967495SFilipe Manana fs_info->send_in_progress = 0; 27508260edbaSJosef Bacik } 27518260edbaSJosef Bacik 27528260edbaSJosef Bacik static int init_mount_fs_info(struct btrfs_fs_info *fs_info, struct super_block *sb) 27538260edbaSJosef Bacik { 27548260edbaSJosef Bacik int ret; 27558260edbaSJosef Bacik 27568260edbaSJosef Bacik fs_info->sb = sb; 27578260edbaSJosef Bacik sb->s_blocksize = BTRFS_BDEV_BLOCKSIZE; 27588260edbaSJosef Bacik sb->s_blocksize_bits = blksize_bits(BTRFS_BDEV_BLOCKSIZE); 27599e967495SFilipe Manana 2760c75e8394SJosef Bacik ret = percpu_counter_init(&fs_info->dio_bytes, 0, GFP_KERNEL); 2761ae18c37aSJosef Bacik if (ret) 2762ae18c37aSJosef Bacik return ret; 2763ae18c37aSJosef Bacik 2764ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 2765ae18c37aSJosef Bacik if (ret) 2766c75e8394SJosef Bacik return ret; 2767ae18c37aSJosef Bacik 2768ae18c37aSJosef Bacik fs_info->dirty_metadata_batch = PAGE_SIZE * 2769ae18c37aSJosef Bacik (1 + ilog2(nr_cpu_ids)); 2770ae18c37aSJosef Bacik 2771ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2772ae18c37aSJosef Bacik if (ret) 2773c75e8394SJosef Bacik return ret; 2774ae18c37aSJosef Bacik 2775ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->dev_replace.bio_counter, 0, 2776ae18c37aSJosef Bacik GFP_KERNEL); 2777ae18c37aSJosef Bacik if (ret) 2778c75e8394SJosef Bacik return ret; 2779ae18c37aSJosef Bacik 2780ae18c37aSJosef Bacik fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 2781ae18c37aSJosef Bacik GFP_KERNEL); 2782c75e8394SJosef Bacik if (!fs_info->delayed_root) 2783c75e8394SJosef Bacik return -ENOMEM; 2784ae18c37aSJosef Bacik btrfs_init_delayed_root(fs_info->delayed_root); 2785ae18c37aSJosef Bacik 2786c75e8394SJosef Bacik return btrfs_alloc_stripe_hash_table(fs_info); 2787ae18c37aSJosef Bacik } 2788ae18c37aSJosef Bacik 278997f4dd09SNikolay Borisov static int btrfs_uuid_rescan_kthread(void *data) 279097f4dd09SNikolay Borisov { 279197f4dd09SNikolay Borisov struct btrfs_fs_info *fs_info = (struct btrfs_fs_info *)data; 279297f4dd09SNikolay Borisov int ret; 279397f4dd09SNikolay Borisov 279497f4dd09SNikolay Borisov /* 279597f4dd09SNikolay Borisov * 1st step is to iterate through the existing UUID tree and 279697f4dd09SNikolay Borisov * to delete all entries that contain outdated data. 279797f4dd09SNikolay Borisov * 2nd step is to add all missing entries to the UUID tree. 279897f4dd09SNikolay Borisov */ 279997f4dd09SNikolay Borisov ret = btrfs_uuid_tree_iterate(fs_info); 280097f4dd09SNikolay Borisov if (ret < 0) { 2801c94bec2cSJosef Bacik if (ret != -EINTR) 2802c94bec2cSJosef Bacik btrfs_warn(fs_info, "iterating uuid_tree failed %d", 2803c94bec2cSJosef Bacik ret); 280497f4dd09SNikolay Borisov up(&fs_info->uuid_tree_rescan_sem); 280597f4dd09SNikolay Borisov return ret; 280697f4dd09SNikolay Borisov } 280797f4dd09SNikolay Borisov return btrfs_uuid_scan_kthread(data); 280897f4dd09SNikolay Borisov } 280997f4dd09SNikolay Borisov 281097f4dd09SNikolay Borisov static int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info) 281197f4dd09SNikolay Borisov { 281297f4dd09SNikolay Borisov struct task_struct *task; 281397f4dd09SNikolay Borisov 281497f4dd09SNikolay Borisov down(&fs_info->uuid_tree_rescan_sem); 281597f4dd09SNikolay Borisov task = kthread_run(btrfs_uuid_rescan_kthread, fs_info, "btrfs-uuid"); 281697f4dd09SNikolay Borisov if (IS_ERR(task)) { 281797f4dd09SNikolay Borisov /* fs_info->update_uuid_tree_gen remains 0 in all error case */ 281897f4dd09SNikolay Borisov btrfs_warn(fs_info, "failed to start uuid_rescan task"); 281997f4dd09SNikolay Borisov up(&fs_info->uuid_tree_rescan_sem); 282097f4dd09SNikolay Borisov return PTR_ERR(task); 282197f4dd09SNikolay Borisov } 282297f4dd09SNikolay Borisov 282397f4dd09SNikolay Borisov return 0; 282497f4dd09SNikolay Borisov } 282597f4dd09SNikolay Borisov 2826ae18c37aSJosef Bacik int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices, 2827ae18c37aSJosef Bacik char *options) 2828ae18c37aSJosef Bacik { 2829ae18c37aSJosef Bacik u32 sectorsize; 2830ae18c37aSJosef Bacik u32 nodesize; 2831ae18c37aSJosef Bacik u32 stripesize; 2832ae18c37aSJosef Bacik u64 generation; 2833ae18c37aSJosef Bacik u64 features; 2834ae18c37aSJosef Bacik u16 csum_type; 2835ae18c37aSJosef Bacik struct btrfs_key location; 2836ae18c37aSJosef Bacik struct btrfs_super_block *disk_super; 2837ae18c37aSJosef Bacik struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2838ae18c37aSJosef Bacik struct btrfs_root *tree_root; 2839ae18c37aSJosef Bacik struct btrfs_root *chunk_root; 2840ae18c37aSJosef Bacik int ret; 2841ae18c37aSJosef Bacik int err = -EINVAL; 2842ae18c37aSJosef Bacik int clear_free_space_tree = 0; 2843ae18c37aSJosef Bacik int level; 2844ae18c37aSJosef Bacik 28458260edbaSJosef Bacik ret = init_mount_fs_info(fs_info, sb); 284653b381b3SDavid Woodhouse if (ret) { 284783c8266aSDavid Sterba err = ret; 2848ae18c37aSJosef Bacik goto fail; 284953b381b3SDavid Woodhouse } 285053b381b3SDavid Woodhouse 2851ae18c37aSJosef Bacik /* These need to be init'ed before we start creating inodes and such. */ 2852ae18c37aSJosef Bacik tree_root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, 2853ae18c37aSJosef Bacik GFP_KERNEL); 2854ae18c37aSJosef Bacik fs_info->tree_root = tree_root; 2855ae18c37aSJosef Bacik chunk_root = btrfs_alloc_root(fs_info, BTRFS_CHUNK_TREE_OBJECTID, 2856ae18c37aSJosef Bacik GFP_KERNEL); 2857ae18c37aSJosef Bacik fs_info->chunk_root = chunk_root; 2858ae18c37aSJosef Bacik if (!tree_root || !chunk_root) { 2859ae18c37aSJosef Bacik err = -ENOMEM; 2860c75e8394SJosef Bacik goto fail; 2861ae18c37aSJosef Bacik } 2862ae18c37aSJosef Bacik 2863ae18c37aSJosef Bacik fs_info->btree_inode = new_inode(sb); 2864ae18c37aSJosef Bacik if (!fs_info->btree_inode) { 2865ae18c37aSJosef Bacik err = -ENOMEM; 2866c75e8394SJosef Bacik goto fail; 2867ae18c37aSJosef Bacik } 2868ae18c37aSJosef Bacik mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 2869ae18c37aSJosef Bacik btrfs_init_btree_inode(fs_info); 2870ae18c37aSJosef Bacik 28713c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 28721104a885SDavid Sterba 28731104a885SDavid Sterba /* 28741104a885SDavid Sterba * Read super block and check the signature bytes only 28751104a885SDavid Sterba */ 28768f32380dSJohannes Thumshirn disk_super = btrfs_read_dev_super(fs_devices->latest_bdev); 28778f32380dSJohannes Thumshirn if (IS_ERR(disk_super)) { 28788f32380dSJohannes Thumshirn err = PTR_ERR(disk_super); 287916cdcec7SMiao Xie goto fail_alloc; 288020b45077SDave Young } 288139279cc3SChris Mason 28821104a885SDavid Sterba /* 28838dc3f22cSJohannes Thumshirn * Verify the type first, if that or the the checksum value are 28848dc3f22cSJohannes Thumshirn * corrupted, we'll find out 28858dc3f22cSJohannes Thumshirn */ 28868f32380dSJohannes Thumshirn csum_type = btrfs_super_csum_type(disk_super); 288751bce6c9SJohannes Thumshirn if (!btrfs_supported_super_csum(csum_type)) { 28888dc3f22cSJohannes Thumshirn btrfs_err(fs_info, "unsupported checksum algorithm: %u", 288951bce6c9SJohannes Thumshirn csum_type); 28908dc3f22cSJohannes Thumshirn err = -EINVAL; 28918f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 28928dc3f22cSJohannes Thumshirn goto fail_alloc; 28938dc3f22cSJohannes Thumshirn } 28948dc3f22cSJohannes Thumshirn 28956d97c6e3SJohannes Thumshirn ret = btrfs_init_csum_hash(fs_info, csum_type); 28966d97c6e3SJohannes Thumshirn if (ret) { 28976d97c6e3SJohannes Thumshirn err = ret; 28988f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 28996d97c6e3SJohannes Thumshirn goto fail_alloc; 29006d97c6e3SJohannes Thumshirn } 29016d97c6e3SJohannes Thumshirn 29028dc3f22cSJohannes Thumshirn /* 29031104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 29041104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 29051104a885SDavid Sterba */ 29068f32380dSJohannes Thumshirn if (btrfs_check_super_csum(fs_info, (u8 *)disk_super)) { 290705135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 29081104a885SDavid Sterba err = -EINVAL; 29098f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 2910141386e1SJosef Bacik goto fail_alloc; 29111104a885SDavid Sterba } 29121104a885SDavid Sterba 29131104a885SDavid Sterba /* 29141104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 29151104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 29161104a885SDavid Sterba * the whole block of INFO_SIZE 29171104a885SDavid Sterba */ 29188f32380dSJohannes Thumshirn memcpy(fs_info->super_copy, disk_super, sizeof(*fs_info->super_copy)); 29198f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29205f39d397SChris Mason 2921fbc6feaeSNikolay Borisov disk_super = fs_info->super_copy; 2922fbc6feaeSNikolay Borisov 2923de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->fsid, fs_info->super_copy->fsid, 2924de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 2925de37aa51SNikolay Borisov 29267239ff4bSNikolay Borisov if (btrfs_fs_incompat(fs_info, METADATA_UUID)) { 2927de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->metadata_uuid, 2928de37aa51SNikolay Borisov fs_info->super_copy->metadata_uuid, 2929de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 29307239ff4bSNikolay Borisov } 29310b86a832SChris Mason 2932fbc6feaeSNikolay Borisov features = btrfs_super_flags(disk_super); 2933fbc6feaeSNikolay Borisov if (features & BTRFS_SUPER_FLAG_CHANGING_FSID_V2) { 2934fbc6feaeSNikolay Borisov features &= ~BTRFS_SUPER_FLAG_CHANGING_FSID_V2; 2935fbc6feaeSNikolay Borisov btrfs_set_super_flags(disk_super, features); 2936fbc6feaeSNikolay Borisov btrfs_info(fs_info, 2937fbc6feaeSNikolay Borisov "found metadata UUID change in progress flag, clearing"); 2938fbc6feaeSNikolay Borisov } 2939fbc6feaeSNikolay Borisov 2940fbc6feaeSNikolay Borisov memcpy(fs_info->super_for_commit, fs_info->super_copy, 2941fbc6feaeSNikolay Borisov sizeof(*fs_info->super_for_commit)); 2942de37aa51SNikolay Borisov 2943069ec957SQu Wenruo ret = btrfs_validate_mount_super(fs_info); 29441104a885SDavid Sterba if (ret) { 294505135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 29461104a885SDavid Sterba err = -EINVAL; 2947141386e1SJosef Bacik goto fail_alloc; 29481104a885SDavid Sterba } 29491104a885SDavid Sterba 29500f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 2951141386e1SJosef Bacik goto fail_alloc; 29520f7d52f4SChris Mason 2953acce952bSliubo /* check FS state, whether FS is broken. */ 295487533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 295587533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2956acce952bSliubo 295775e7cb7fSLiu Bo /* 295875e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 295975e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 296075e7cb7fSLiu Bo */ 296175e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 296275e7cb7fSLiu Bo 29632ff7e61eSJeff Mahoney ret = btrfs_parse_options(fs_info, options, sb->s_flags); 29642b82032cSYan Zheng if (ret) { 29652b82032cSYan Zheng err = ret; 2966141386e1SJosef Bacik goto fail_alloc; 29672b82032cSYan Zheng } 2968dfe25020SChris Mason 2969f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2970f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2971f2b636e8SJosef Bacik if (features) { 297205135f59SDavid Sterba btrfs_err(fs_info, 297305135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 2974c1c9ff7cSGeert Uytterhoeven features); 2975f2b636e8SJosef Bacik err = -EINVAL; 2976141386e1SJosef Bacik goto fail_alloc; 2977f2b636e8SJosef Bacik } 2978f2b636e8SJosef Bacik 29795d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 29805d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 29810b246afaSJeff Mahoney if (fs_info->compress_type == BTRFS_COMPRESS_LZO) 2982a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 29835c1aab1dSNick Terrell else if (fs_info->compress_type == BTRFS_COMPRESS_ZSTD) 29845c1aab1dSNick Terrell features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD; 2985727011e0SChris Mason 29863173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 298705135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 29883173a18fSJosef Bacik 2989727011e0SChris Mason /* 2990727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2991727011e0SChris Mason * they are bigger than the page size 2992727011e0SChris Mason */ 299309cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 2994727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 299505135f59SDavid Sterba btrfs_info(fs_info, 299605135f59SDavid Sterba "flagging fs with big metadata feature"); 2997727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2998727011e0SChris Mason } 2999727011e0SChris Mason 3000bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 3001bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 3002b7f67055SChandan Rajendra stripesize = sectorsize; 3003707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 3004963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 3005bc3f116fSChris Mason 3006da17066cSJeff Mahoney /* Cache block sizes */ 3007da17066cSJeff Mahoney fs_info->nodesize = nodesize; 3008da17066cSJeff Mahoney fs_info->sectorsize = sectorsize; 3009da17066cSJeff Mahoney fs_info->stripesize = stripesize; 3010da17066cSJeff Mahoney 3011bc3f116fSChris Mason /* 3012bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 3013bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 3014bc3f116fSChris Mason */ 3015bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 3016707e8a07SDavid Sterba (sectorsize != nodesize)) { 301705135f59SDavid Sterba btrfs_err(fs_info, 301805135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 301905135f59SDavid Sterba nodesize, sectorsize); 3020141386e1SJosef Bacik goto fail_alloc; 3021bc3f116fSChris Mason } 3022bc3f116fSChris Mason 3023ceda0864SMiao Xie /* 3024ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 3025ceda0864SMiao Xie * update the flag. 3026ceda0864SMiao Xie */ 30275d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 30285d4f98a2SYan Zheng 3029f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 3030f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 3031bc98a42cSDavid Howells if (!sb_rdonly(sb) && features) { 303205135f59SDavid Sterba btrfs_err(fs_info, 303305135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 3034c1c9ff7cSGeert Uytterhoeven features); 3035f2b636e8SJosef Bacik err = -EINVAL; 3036141386e1SJosef Bacik goto fail_alloc; 3037f2b636e8SJosef Bacik } 303861d92c32SChris Mason 30392a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 30402a458198SEric Sandeen if (ret) { 30412a458198SEric Sandeen err = ret; 30420dc3b84aSJosef Bacik goto fail_sb_buffer; 30430dc3b84aSJosef Bacik } 30444543df7eSChris Mason 30459e11ceeeSJan Kara sb->s_bdi->congested_fn = btrfs_congested_fn; 30469e11ceeeSJan Kara sb->s_bdi->congested_data = fs_info; 30479e11ceeeSJan Kara sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 3048b5420237SNikolay Borisov sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; 30499e11ceeeSJan Kara sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); 30509e11ceeeSJan Kara sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); 30514575c9ccSChris Mason 3052a061fc8dSChris Mason sb->s_blocksize = sectorsize; 3053a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 3054de37aa51SNikolay Borisov memcpy(&sb->s_uuid, fs_info->fs_devices->fsid, BTRFS_FSID_SIZE); 3055db94535dSChris Mason 3056925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 30576bccf3abSJeff Mahoney ret = btrfs_read_sys_array(fs_info); 3058925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 305984eed90fSChris Mason if (ret) { 306005135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 30615d4f98a2SYan Zheng goto fail_sb_buffer; 306284eed90fSChris Mason } 30630b86a832SChris Mason 306484234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 3065581c1760SQu Wenruo level = btrfs_super_chunk_root_level(disk_super); 30660b86a832SChris Mason 30672ff7e61eSJeff Mahoney chunk_root->node = read_tree_block(fs_info, 30680b86a832SChris Mason btrfs_super_chunk_root(disk_super), 3069581c1760SQu Wenruo generation, level, NULL); 307064c043deSLiu Bo if (IS_ERR(chunk_root->node) || 307164c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 307205135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 3073e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 3074e5fffbacSchandan free_extent_buffer(chunk_root->node); 307595ab1f64SZhao Lei chunk_root->node = NULL; 3076af31f5e5SChris Mason goto fail_tree_roots; 307783121942SDavid Woodhouse } 30785d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 30795d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 30800b86a832SChris Mason 3081e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 3082c4ac7541SDavid Sterba offsetof(struct btrfs_header, chunk_tree_uuid), 3083c4ac7541SDavid Sterba BTRFS_UUID_SIZE); 3084e17cade2SChris Mason 30855b4aacefSJeff Mahoney ret = btrfs_read_chunk_tree(fs_info); 30862b82032cSYan Zheng if (ret) { 308705135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 3088af31f5e5SChris Mason goto fail_tree_roots; 30892b82032cSYan Zheng } 30900b86a832SChris Mason 30918dabb742SStefan Behrens /* 30929b99b115SAnand Jain * Keep the devid that is marked to be the target device for the 30939b99b115SAnand Jain * device replace procedure 30948dabb742SStefan Behrens */ 30959b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 0); 3096dfe25020SChris Mason 3097a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 309805135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 3099a6b0d5c8SChris Mason goto fail_tree_roots; 3100a6b0d5c8SChris Mason } 3101a6b0d5c8SChris Mason 3102b8522a1eSNikolay Borisov ret = init_tree_roots(fs_info); 31034bbcaa64SEric Sandeen if (ret) 3104b8522a1eSNikolay Borisov goto fail_tree_roots; 31058929ecfaSYan, Zheng 310675ec1db8SJosef Bacik /* 310775ec1db8SJosef Bacik * If we have a uuid root and we're not being told to rescan we need to 310875ec1db8SJosef Bacik * check the generation here so we can set the 310975ec1db8SJosef Bacik * BTRFS_FS_UPDATE_UUID_TREE_GEN bit. Otherwise we could commit the 311075ec1db8SJosef Bacik * transaction during a balance or the log replay without updating the 311175ec1db8SJosef Bacik * uuid generation, and then if we crash we would rescan the uuid tree, 311275ec1db8SJosef Bacik * even though it was perfectly fine. 311375ec1db8SJosef Bacik */ 311475ec1db8SJosef Bacik if (fs_info->uuid_root && !btrfs_test_opt(fs_info, RESCAN_UUID_TREE) && 311575ec1db8SJosef Bacik fs_info->generation == btrfs_super_uuid_tree_generation(disk_super)) 311675ec1db8SJosef Bacik set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); 311775ec1db8SJosef Bacik 3118cf90d884SQu Wenruo ret = btrfs_verify_dev_extents(fs_info); 3119cf90d884SQu Wenruo if (ret) { 3120cf90d884SQu Wenruo btrfs_err(fs_info, 3121cf90d884SQu Wenruo "failed to verify dev extents against chunks: %d", 3122cf90d884SQu Wenruo ret); 3123cf90d884SQu Wenruo goto fail_block_groups; 3124cf90d884SQu Wenruo } 312568310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 312668310a5eSIlya Dryomov if (ret) { 312705135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 312868310a5eSIlya Dryomov goto fail_block_groups; 312968310a5eSIlya Dryomov } 313068310a5eSIlya Dryomov 3131733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 3132733f4fbbSStefan Behrens if (ret) { 313305135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 3134733f4fbbSStefan Behrens goto fail_block_groups; 3135733f4fbbSStefan Behrens } 3136733f4fbbSStefan Behrens 31378dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 31388dabb742SStefan Behrens if (ret) { 313905135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 31408dabb742SStefan Behrens goto fail_block_groups; 31418dabb742SStefan Behrens } 31428dabb742SStefan Behrens 31439b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 1); 31448dabb742SStefan Behrens 3145c6761a9eSAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices); 3146b7c35e81SAnand Jain if (ret) { 314705135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 314805135f59SDavid Sterba ret); 3149b7c35e81SAnand Jain goto fail_block_groups; 3150b7c35e81SAnand Jain } 3151b7c35e81SAnand Jain 315296f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 31535ac1d209SJeff Mahoney if (ret) { 315405135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 3155b7c35e81SAnand Jain goto fail_fsdev_sysfs; 31565ac1d209SJeff Mahoney } 31575ac1d209SJeff Mahoney 3158c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 3159c59021f8Sliubo if (ret) { 316005135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 31612365dd3cSAnand Jain goto fail_sysfs; 3162c59021f8Sliubo } 3163c59021f8Sliubo 31645b4aacefSJeff Mahoney ret = btrfs_read_block_groups(fs_info); 31651b1d1f66SJosef Bacik if (ret) { 316605135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 31672365dd3cSAnand Jain goto fail_sysfs; 31681b1d1f66SJosef Bacik } 31694330e183SQu Wenruo 31706528b99dSAnand Jain if (!sb_rdonly(sb) && !btrfs_check_rw_degradable(fs_info, NULL)) { 317105135f59SDavid Sterba btrfs_warn(fs_info, 317252042d8eSAndrea Gelmini "writable mount is not allowed due to too many missing devices"); 31732365dd3cSAnand Jain goto fail_sysfs; 3174292fd7fcSStefan Behrens } 31759078a3e1SChris Mason 3176a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3177a74a4b97SChris Mason "btrfs-cleaner"); 317857506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 31792365dd3cSAnand Jain goto fail_sysfs; 3180a74a4b97SChris Mason 3181a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3182a74a4b97SChris Mason tree_root, 3183a74a4b97SChris Mason "btrfs-transaction"); 318457506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 31853f157a2fSChris Mason goto fail_cleaner; 3186a74a4b97SChris Mason 3187583b7231SHans van Kranenburg if (!btrfs_test_opt(fs_info, NOSSD) && 3188c289811cSChris Mason !fs_info->fs_devices->rotating) { 3189583b7231SHans van Kranenburg btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations"); 3190c289811cSChris Mason } 3191c289811cSChris Mason 3192572d9ab7SDavid Sterba /* 319301327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3194572d9ab7SDavid Sterba * not have to wait for transaction commit 3195572d9ab7SDavid Sterba */ 3196572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 31973818aea2SQu Wenruo 319821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 31990b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) { 32002ff7e61eSJeff Mahoney ret = btrfsic_mount(fs_info, fs_devices, 32010b246afaSJeff Mahoney btrfs_test_opt(fs_info, 320221adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 320321adbd5cSStefan Behrens 1 : 0, 320421adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 320521adbd5cSStefan Behrens if (ret) 320605135f59SDavid Sterba btrfs_warn(fs_info, 320705135f59SDavid Sterba "failed to initialize integrity check module: %d", 320805135f59SDavid Sterba ret); 320921adbd5cSStefan Behrens } 321021adbd5cSStefan Behrens #endif 3211bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3212bcef60f2SArne Jansen if (ret) 3213bcef60f2SArne Jansen goto fail_trans_kthread; 321421adbd5cSStefan Behrens 3215fd708b81SJosef Bacik if (btrfs_build_ref_tree(fs_info)) 3216fd708b81SJosef Bacik btrfs_err(fs_info, "couldn't build ref tree"); 3217fd708b81SJosef Bacik 321896da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 321996da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 32200b246afaSJeff Mahoney !btrfs_test_opt(fs_info, NOLOGREPLAY)) { 3221e8294f2fSDavid Sterba btrfs_info(fs_info, "start tree-log replay"); 322263443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 322379787eaaSJeff Mahoney if (ret) { 322463443bf5SEric Sandeen err = ret; 322528c16cbbSWang Shilong goto fail_qgroup; 3226e556ce2cSYan Zheng } 3227e02119d5SChris Mason } 32281a40e23bSZheng Yan 32296bccf3abSJeff Mahoney ret = btrfs_find_orphan_roots(fs_info); 323079787eaaSJeff Mahoney if (ret) 323128c16cbbSWang Shilong goto fail_qgroup; 323276dda93cSYan, Zheng 3233bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3234d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 323544c44af2SIlya Dryomov if (ret) 323628c16cbbSWang Shilong goto fail_qgroup; 323790c711abSZygo Blaxell 323890c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 32395d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 324090c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3241d7ce5843SMiao Xie if (ret < 0) { 324205135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 324305135f59SDavid Sterba ret); 3244d7ce5843SMiao Xie err = -EINVAL; 3245bcef60f2SArne Jansen goto fail_qgroup; 3246d7ce5843SMiao Xie } 32477c2ca468SChris Mason } 32481a40e23bSZheng Yan 32493de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 32503de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 3251cb517eabSMiao Xie location.offset = 0; 32523de4586cSChris Mason 32533619c94fSJosef Bacik fs_info->fs_root = btrfs_get_fs_root(fs_info, &location, true); 32543140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 32553140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3256f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read fs tree: %d", err); 3257315bf8efSJosef Bacik fs_info->fs_root = NULL; 3258bcef60f2SArne Jansen goto fail_qgroup; 32593140c9a3SDan Carpenter } 3260c289811cSChris Mason 3261bc98a42cSDavid Howells if (sb_rdonly(sb)) 32622b6ba629SIlya Dryomov return 0; 32632b6ba629SIlya Dryomov 3264f8d468a1SOmar Sandoval if (btrfs_test_opt(fs_info, CLEAR_CACHE) && 3265f8d468a1SOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 32666675df31SOmar Sandoval clear_free_space_tree = 1; 32676675df31SOmar Sandoval } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && 32686675df31SOmar Sandoval !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) { 32696675df31SOmar Sandoval btrfs_warn(fs_info, "free space tree is invalid"); 32706675df31SOmar Sandoval clear_free_space_tree = 1; 32716675df31SOmar Sandoval } 32726675df31SOmar Sandoval 32736675df31SOmar Sandoval if (clear_free_space_tree) { 3274f8d468a1SOmar Sandoval btrfs_info(fs_info, "clearing free space tree"); 3275f8d468a1SOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 3276f8d468a1SOmar Sandoval if (ret) { 3277f8d468a1SOmar Sandoval btrfs_warn(fs_info, 3278f8d468a1SOmar Sandoval "failed to clear free space tree: %d", ret); 32796bccf3abSJeff Mahoney close_ctree(fs_info); 3280f8d468a1SOmar Sandoval return ret; 3281f8d468a1SOmar Sandoval } 3282f8d468a1SOmar Sandoval } 3283f8d468a1SOmar Sandoval 32840b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) && 3285511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 328605135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3287511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3288511711afSChris Mason if (ret) { 328905135f59SDavid Sterba btrfs_warn(fs_info, 329005135f59SDavid Sterba "failed to create free space tree: %d", ret); 32916bccf3abSJeff Mahoney close_ctree(fs_info); 3292511711afSChris Mason return ret; 3293511711afSChris Mason } 3294511711afSChris Mason } 3295511711afSChris Mason 3296e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 32972b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 32982b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 32992b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 33006bccf3abSJeff Mahoney close_ctree(fs_info); 33012b6ba629SIlya Dryomov return ret; 33022b6ba629SIlya Dryomov } 3303e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 330459641015SIlya Dryomov 33052b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 33062b6ba629SIlya Dryomov if (ret) { 330705135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 33086bccf3abSJeff Mahoney close_ctree(fs_info); 33092b6ba629SIlya Dryomov return ret; 3310e3acc2a6SJosef Bacik } 3311e3acc2a6SJosef Bacik 33128dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 33138dabb742SStefan Behrens if (ret) { 331405135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 33156bccf3abSJeff Mahoney close_ctree(fs_info); 33168dabb742SStefan Behrens return ret; 33178dabb742SStefan Behrens } 33188dabb742SStefan Behrens 3319b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3320b0643e59SDennis Zhou btrfs_discard_resume(fs_info); 3321b382a324SJan Schmidt 33224bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 332305135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3324f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3325f7a81ea4SStefan Behrens if (ret) { 332605135f59SDavid Sterba btrfs_warn(fs_info, 332705135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 33286bccf3abSJeff Mahoney close_ctree(fs_info); 3329f7a81ea4SStefan Behrens return ret; 3330f7a81ea4SStefan Behrens } 33310b246afaSJeff Mahoney } else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || 33324bbcaa64SEric Sandeen fs_info->generation != 33334bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 333405135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 333570f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 333670f80175SStefan Behrens if (ret) { 333705135f59SDavid Sterba btrfs_warn(fs_info, 333805135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 33396bccf3abSJeff Mahoney close_ctree(fs_info); 334070f80175SStefan Behrens return ret; 334170f80175SStefan Behrens } 3342f7a81ea4SStefan Behrens } 3343afcdd129SJosef Bacik set_bit(BTRFS_FS_OPEN, &fs_info->flags); 334447ab2a6cSJosef Bacik 33458dcddfa0SQu Wenruo /* 33468dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 33478dcddfa0SQu Wenruo * no need to keep the flag 33488dcddfa0SQu Wenruo */ 33498dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 33508dcddfa0SQu Wenruo 3351ad2b2c80SAl Viro return 0; 335239279cc3SChris Mason 3353bcef60f2SArne Jansen fail_qgroup: 3354bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 33557c2ca468SChris Mason fail_trans_kthread: 33567c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 33572ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 3358faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 33593f157a2fSChris Mason fail_cleaner: 3360a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 33617c2ca468SChris Mason 33627c2ca468SChris Mason /* 33637c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 33647c2ca468SChris Mason * kthreads 33657c2ca468SChris Mason */ 33667c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 33677c2ca468SChris Mason 33682365dd3cSAnand Jain fail_sysfs: 33696618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 33702365dd3cSAnand Jain 3371b7c35e81SAnand Jain fail_fsdev_sysfs: 3372b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3373b7c35e81SAnand Jain 33741b1d1f66SJosef Bacik fail_block_groups: 337554067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 3376af31f5e5SChris Mason 3377af31f5e5SChris Mason fail_tree_roots: 33784273eaffSAnand Jain free_root_pointers(fs_info, true); 33792b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3380af31f5e5SChris Mason 338139279cc3SChris Mason fail_sb_buffer: 33827abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 33835cdd7db6SFilipe Manana btrfs_free_block_groups(fs_info); 338416cdcec7SMiao Xie fail_alloc: 3385586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3386586e46e2SIlya Dryomov 33874543df7eSChris Mason iput(fs_info->btree_inode); 33887e662854SQinghuang Feng fail: 3389586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3390ad2b2c80SAl Viro return err; 3391eb60ceacSChris Mason } 3392663faf9fSMasami Hiramatsu ALLOW_ERROR_INJECTION(open_ctree, ERRNO); 3393eb60ceacSChris Mason 3394314b6dd0SJohannes Thumshirn static void btrfs_end_super_write(struct bio *bio) 3395f2984462SChris Mason { 3396314b6dd0SJohannes Thumshirn struct btrfs_device *device = bio->bi_private; 3397314b6dd0SJohannes Thumshirn struct bio_vec *bvec; 3398314b6dd0SJohannes Thumshirn struct bvec_iter_all iter_all; 3399314b6dd0SJohannes Thumshirn struct page *page; 3400442a4f63SStefan Behrens 3401314b6dd0SJohannes Thumshirn bio_for_each_segment_all(bvec, bio, iter_all) { 3402314b6dd0SJohannes Thumshirn page = bvec->bv_page; 3403314b6dd0SJohannes Thumshirn 3404314b6dd0SJohannes Thumshirn if (bio->bi_status) { 3405fb456252SJeff Mahoney btrfs_warn_rl_in_rcu(device->fs_info, 3406314b6dd0SJohannes Thumshirn "lost page write due to IO error on %s (%d)", 3407314b6dd0SJohannes Thumshirn rcu_str_deref(device->name), 3408314b6dd0SJohannes Thumshirn blk_status_to_errno(bio->bi_status)); 3409314b6dd0SJohannes Thumshirn ClearPageUptodate(page); 3410314b6dd0SJohannes Thumshirn SetPageError(page); 3411314b6dd0SJohannes Thumshirn btrfs_dev_stat_inc_and_print(device, 3412314b6dd0SJohannes Thumshirn BTRFS_DEV_STAT_WRITE_ERRS); 3413314b6dd0SJohannes Thumshirn } else { 3414314b6dd0SJohannes Thumshirn SetPageUptodate(page); 3415f2984462SChris Mason } 3416314b6dd0SJohannes Thumshirn 3417314b6dd0SJohannes Thumshirn put_page(page); 3418314b6dd0SJohannes Thumshirn unlock_page(page); 3419314b6dd0SJohannes Thumshirn } 3420314b6dd0SJohannes Thumshirn 3421314b6dd0SJohannes Thumshirn bio_put(bio); 3422f2984462SChris Mason } 3423f2984462SChris Mason 34248f32380dSJohannes Thumshirn struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, 34258f32380dSJohannes Thumshirn int copy_num) 342629c36d72SAnand Jain { 342729c36d72SAnand Jain struct btrfs_super_block *super; 34288f32380dSJohannes Thumshirn struct page *page; 342929c36d72SAnand Jain u64 bytenr; 34308f32380dSJohannes Thumshirn struct address_space *mapping = bdev->bd_inode->i_mapping; 343129c36d72SAnand Jain 343229c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 343329c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 34348f32380dSJohannes Thumshirn return ERR_PTR(-EINVAL); 343529c36d72SAnand Jain 34368f32380dSJohannes Thumshirn page = read_cache_page_gfp(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS); 34378f32380dSJohannes Thumshirn if (IS_ERR(page)) 34388f32380dSJohannes Thumshirn return ERR_CAST(page); 343929c36d72SAnand Jain 34408f32380dSJohannes Thumshirn super = page_address(page); 344129c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 344229c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 34438f32380dSJohannes Thumshirn btrfs_release_disk_super(super); 34448f32380dSJohannes Thumshirn return ERR_PTR(-EINVAL); 344529c36d72SAnand Jain } 344629c36d72SAnand Jain 34478f32380dSJohannes Thumshirn return super; 344829c36d72SAnand Jain } 344929c36d72SAnand Jain 345029c36d72SAnand Jain 34518f32380dSJohannes Thumshirn struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev) 3452a512bbf8SYan Zheng { 34538f32380dSJohannes Thumshirn struct btrfs_super_block *super, *latest = NULL; 3454a512bbf8SYan Zheng int i; 3455a512bbf8SYan Zheng u64 transid = 0; 3456a512bbf8SYan Zheng 3457a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3458a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3459a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3460a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3461a512bbf8SYan Zheng */ 3462a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 34638f32380dSJohannes Thumshirn super = btrfs_read_dev_one_super(bdev, i); 34648f32380dSJohannes Thumshirn if (IS_ERR(super)) 3465a512bbf8SYan Zheng continue; 3466a512bbf8SYan Zheng 3467a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 34688f32380dSJohannes Thumshirn if (latest) 34698f32380dSJohannes Thumshirn btrfs_release_disk_super(super); 34708f32380dSJohannes Thumshirn 34718f32380dSJohannes Thumshirn latest = super; 3472a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3473a512bbf8SYan Zheng } 3474a512bbf8SYan Zheng } 347592fc03fbSAnand Jain 34768f32380dSJohannes Thumshirn return super; 3477a512bbf8SYan Zheng } 3478a512bbf8SYan Zheng 34794eedeb75SHisashi Hifumi /* 3480abbb3b8eSDavid Sterba * Write superblock @sb to the @device. Do not wait for completion, all the 3481314b6dd0SJohannes Thumshirn * pages we use for writing are locked. 34824eedeb75SHisashi Hifumi * 3483abbb3b8eSDavid Sterba * Write @max_mirrors copies of the superblock, where 0 means default that fit 3484abbb3b8eSDavid Sterba * the expected device size at commit time. Note that max_mirrors must be 3485abbb3b8eSDavid Sterba * same for write and wait phases. 34864eedeb75SHisashi Hifumi * 3487314b6dd0SJohannes Thumshirn * Return number of errors when page is not found or submission fails. 34884eedeb75SHisashi Hifumi */ 3489a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3490abbb3b8eSDavid Sterba struct btrfs_super_block *sb, int max_mirrors) 3491a512bbf8SYan Zheng { 3492d5178578SJohannes Thumshirn struct btrfs_fs_info *fs_info = device->fs_info; 3493314b6dd0SJohannes Thumshirn struct address_space *mapping = device->bdev->bd_inode->i_mapping; 3494d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 3495a512bbf8SYan Zheng int i; 3496a512bbf8SYan Zheng int errors = 0; 3497a512bbf8SYan Zheng u64 bytenr; 3498a512bbf8SYan Zheng 3499a512bbf8SYan Zheng if (max_mirrors == 0) 3500a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3501a512bbf8SYan Zheng 3502d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 3503d5178578SJohannes Thumshirn 3504a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3505314b6dd0SJohannes Thumshirn struct page *page; 3506314b6dd0SJohannes Thumshirn struct bio *bio; 3507314b6dd0SJohannes Thumshirn struct btrfs_super_block *disk_super; 3508314b6dd0SJohannes Thumshirn 3509a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3510935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3511935e5cc9SMiao Xie device->commit_total_bytes) 3512a512bbf8SYan Zheng break; 3513a512bbf8SYan Zheng 3514a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3515a512bbf8SYan Zheng 3516d5178578SJohannes Thumshirn crypto_shash_init(shash); 3517d5178578SJohannes Thumshirn crypto_shash_update(shash, (const char *)sb + BTRFS_CSUM_SIZE, 3518abbb3b8eSDavid Sterba BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 3519d5178578SJohannes Thumshirn crypto_shash_final(shash, sb->csum); 3520a512bbf8SYan Zheng 3521314b6dd0SJohannes Thumshirn page = find_or_create_page(mapping, bytenr >> PAGE_SHIFT, 3522314b6dd0SJohannes Thumshirn GFP_NOFS); 3523314b6dd0SJohannes Thumshirn if (!page) { 3524fb456252SJeff Mahoney btrfs_err(device->fs_info, 3525314b6dd0SJohannes Thumshirn "couldn't get super block page for bytenr %llu", 3526f14d104dSDavid Sterba bytenr); 3527634554dcSJosef Bacik errors++; 3528634554dcSJosef Bacik continue; 3529634554dcSJosef Bacik } 3530634554dcSJosef Bacik 3531314b6dd0SJohannes Thumshirn /* Bump the refcount for wait_dev_supers() */ 3532314b6dd0SJohannes Thumshirn get_page(page); 3533a512bbf8SYan Zheng 3534314b6dd0SJohannes Thumshirn disk_super = page_address(page); 3535314b6dd0SJohannes Thumshirn memcpy(disk_super, sb, BTRFS_SUPER_INFO_SIZE); 3536a512bbf8SYan Zheng 3537387125fcSChris Mason /* 3538314b6dd0SJohannes Thumshirn * Directly use bios here instead of relying on the page cache 3539314b6dd0SJohannes Thumshirn * to do I/O, so we don't lose the ability to do integrity 3540314b6dd0SJohannes Thumshirn * checking. 3541387125fcSChris Mason */ 3542314b6dd0SJohannes Thumshirn bio = bio_alloc(GFP_NOFS, 1); 3543314b6dd0SJohannes Thumshirn bio_set_dev(bio, device->bdev); 3544314b6dd0SJohannes Thumshirn bio->bi_iter.bi_sector = bytenr >> SECTOR_SHIFT; 3545314b6dd0SJohannes Thumshirn bio->bi_private = device; 3546314b6dd0SJohannes Thumshirn bio->bi_end_io = btrfs_end_super_write; 3547314b6dd0SJohannes Thumshirn __bio_add_page(bio, page, BTRFS_SUPER_INFO_SIZE, 3548314b6dd0SJohannes Thumshirn offset_in_page(bytenr)); 3549314b6dd0SJohannes Thumshirn 3550314b6dd0SJohannes Thumshirn /* 3551314b6dd0SJohannes Thumshirn * We FUA only the first super block. The others we allow to 3552314b6dd0SJohannes Thumshirn * go down lazy and there's a short window where the on-disk 3553314b6dd0SJohannes Thumshirn * copies might still contain the older version. 3554314b6dd0SJohannes Thumshirn */ 3555314b6dd0SJohannes Thumshirn bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_META | REQ_PRIO; 35561b9e619cSOmar Sandoval if (i == 0 && !btrfs_test_opt(device->fs_info, NOBARRIER)) 3557314b6dd0SJohannes Thumshirn bio->bi_opf |= REQ_FUA; 3558314b6dd0SJohannes Thumshirn 3559314b6dd0SJohannes Thumshirn btrfsic_submit_bio(bio); 3560a512bbf8SYan Zheng } 3561a512bbf8SYan Zheng return errors < i ? 0 : -1; 3562a512bbf8SYan Zheng } 3563a512bbf8SYan Zheng 3564387125fcSChris Mason /* 3565abbb3b8eSDavid Sterba * Wait for write completion of superblocks done by write_dev_supers, 3566abbb3b8eSDavid Sterba * @max_mirrors same for write and wait phases. 3567abbb3b8eSDavid Sterba * 3568314b6dd0SJohannes Thumshirn * Return number of errors when page is not found or not marked up to 3569abbb3b8eSDavid Sterba * date. 3570abbb3b8eSDavid Sterba */ 3571abbb3b8eSDavid Sterba static int wait_dev_supers(struct btrfs_device *device, int max_mirrors) 3572abbb3b8eSDavid Sterba { 3573abbb3b8eSDavid Sterba int i; 3574abbb3b8eSDavid Sterba int errors = 0; 3575b6a535faSHoward McLauchlan bool primary_failed = false; 3576abbb3b8eSDavid Sterba u64 bytenr; 3577abbb3b8eSDavid Sterba 3578abbb3b8eSDavid Sterba if (max_mirrors == 0) 3579abbb3b8eSDavid Sterba max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3580abbb3b8eSDavid Sterba 3581abbb3b8eSDavid Sterba for (i = 0; i < max_mirrors; i++) { 3582314b6dd0SJohannes Thumshirn struct page *page; 3583314b6dd0SJohannes Thumshirn 3584abbb3b8eSDavid Sterba bytenr = btrfs_sb_offset(i); 3585abbb3b8eSDavid Sterba if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3586abbb3b8eSDavid Sterba device->commit_total_bytes) 3587abbb3b8eSDavid Sterba break; 3588abbb3b8eSDavid Sterba 3589314b6dd0SJohannes Thumshirn page = find_get_page(device->bdev->bd_inode->i_mapping, 3590314b6dd0SJohannes Thumshirn bytenr >> PAGE_SHIFT); 3591314b6dd0SJohannes Thumshirn if (!page) { 3592abbb3b8eSDavid Sterba errors++; 3593b6a535faSHoward McLauchlan if (i == 0) 3594b6a535faSHoward McLauchlan primary_failed = true; 3595abbb3b8eSDavid Sterba continue; 3596abbb3b8eSDavid Sterba } 3597314b6dd0SJohannes Thumshirn /* Page is submitted locked and unlocked once the IO completes */ 3598314b6dd0SJohannes Thumshirn wait_on_page_locked(page); 3599314b6dd0SJohannes Thumshirn if (PageError(page)) { 3600abbb3b8eSDavid Sterba errors++; 3601b6a535faSHoward McLauchlan if (i == 0) 3602b6a535faSHoward McLauchlan primary_failed = true; 3603b6a535faSHoward McLauchlan } 3604abbb3b8eSDavid Sterba 3605314b6dd0SJohannes Thumshirn /* Drop our reference */ 3606314b6dd0SJohannes Thumshirn put_page(page); 3607abbb3b8eSDavid Sterba 3608314b6dd0SJohannes Thumshirn /* Drop the reference from the writing run */ 3609314b6dd0SJohannes Thumshirn put_page(page); 3610abbb3b8eSDavid Sterba } 3611abbb3b8eSDavid Sterba 3612b6a535faSHoward McLauchlan /* log error, force error return */ 3613b6a535faSHoward McLauchlan if (primary_failed) { 3614b6a535faSHoward McLauchlan btrfs_err(device->fs_info, "error writing primary super block to device %llu", 3615b6a535faSHoward McLauchlan device->devid); 3616b6a535faSHoward McLauchlan return -1; 3617b6a535faSHoward McLauchlan } 3618b6a535faSHoward McLauchlan 3619abbb3b8eSDavid Sterba return errors < i ? 0 : -1; 3620abbb3b8eSDavid Sterba } 3621abbb3b8eSDavid Sterba 3622abbb3b8eSDavid Sterba /* 3623387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3624387125fcSChris Mason * for the barrier when it is done 3625387125fcSChris Mason */ 36264246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3627387125fcSChris Mason { 3628387125fcSChris Mason complete(bio->bi_private); 3629387125fcSChris Mason } 3630387125fcSChris Mason 3631387125fcSChris Mason /* 36324fc6441aSAnand Jain * Submit a flush request to the device if it supports it. Error handling is 36334fc6441aSAnand Jain * done in the waiting counterpart. 3634387125fcSChris Mason */ 36354fc6441aSAnand Jain static void write_dev_flush(struct btrfs_device *device) 3636387125fcSChris Mason { 3637c2a9c7abSAnand Jain struct request_queue *q = bdev_get_queue(device->bdev); 3638e0ae9994SDavid Sterba struct bio *bio = device->flush_bio; 3639387125fcSChris Mason 3640c2a9c7abSAnand Jain if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) 36414fc6441aSAnand Jain return; 3642387125fcSChris Mason 3643e0ae9994SDavid Sterba bio_reset(bio); 3644387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 364574d46992SChristoph Hellwig bio_set_dev(bio, device->bdev); 36468d910125SJan Kara bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH; 3647387125fcSChris Mason init_completion(&device->flush_wait); 3648387125fcSChris Mason bio->bi_private = &device->flush_wait; 3649387125fcSChris Mason 365043a01111SLu Fengqi btrfsic_submit_bio(bio); 36511c3063b6SAnand Jain set_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 36524fc6441aSAnand Jain } 3653387125fcSChris Mason 36544fc6441aSAnand Jain /* 36554fc6441aSAnand Jain * If the flush bio has been submitted by write_dev_flush, wait for it. 36564fc6441aSAnand Jain */ 36578c27cb35SLinus Torvalds static blk_status_t wait_dev_flush(struct btrfs_device *device) 36584fc6441aSAnand Jain { 36594fc6441aSAnand Jain struct bio *bio = device->flush_bio; 36604fc6441aSAnand Jain 36611c3063b6SAnand Jain if (!test_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state)) 366258efbc9fSOmar Sandoval return BLK_STS_OK; 36634fc6441aSAnand Jain 36641c3063b6SAnand Jain clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 36652980d574SDavid Sterba wait_for_completion_io(&device->flush_wait); 36664fc6441aSAnand Jain 36678c27cb35SLinus Torvalds return bio->bi_status; 3668387125fcSChris Mason } 3669387125fcSChris Mason 3670d10b82feSQu Wenruo static int check_barrier_error(struct btrfs_fs_info *fs_info) 3671401b41e5SAnand Jain { 36726528b99dSAnand Jain if (!btrfs_check_rw_degradable(fs_info, NULL)) 3673401b41e5SAnand Jain return -EIO; 3674387125fcSChris Mason return 0; 3675387125fcSChris Mason } 3676387125fcSChris Mason 3677387125fcSChris Mason /* 3678387125fcSChris Mason * send an empty flush down to each device in parallel, 3679387125fcSChris Mason * then wait for them 3680387125fcSChris Mason */ 3681387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3682387125fcSChris Mason { 3683387125fcSChris Mason struct list_head *head; 3684387125fcSChris Mason struct btrfs_device *dev; 36855af3e8ccSStefan Behrens int errors_wait = 0; 36864e4cbee9SChristoph Hellwig blk_status_t ret; 3687387125fcSChris Mason 36881538e6c5SDavid Sterba lockdep_assert_held(&info->fs_devices->device_list_mutex); 3689387125fcSChris Mason /* send down all the barriers */ 3690387125fcSChris Mason head = &info->fs_devices->devices; 36911538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3692e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3693f88ba6a2SHidetoshi Seto continue; 3694cea7c8bfSAnand Jain if (!dev->bdev) 3695387125fcSChris Mason continue; 3696e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3697ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3698387125fcSChris Mason continue; 3699387125fcSChris Mason 37004fc6441aSAnand Jain write_dev_flush(dev); 370158efbc9fSOmar Sandoval dev->last_flush_error = BLK_STS_OK; 3702387125fcSChris Mason } 3703387125fcSChris Mason 3704387125fcSChris Mason /* wait for all the barriers */ 37051538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3706e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3707f88ba6a2SHidetoshi Seto continue; 3708387125fcSChris Mason if (!dev->bdev) { 37095af3e8ccSStefan Behrens errors_wait++; 3710387125fcSChris Mason continue; 3711387125fcSChris Mason } 3712e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3713ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3714387125fcSChris Mason continue; 3715387125fcSChris Mason 37164fc6441aSAnand Jain ret = wait_dev_flush(dev); 3717401b41e5SAnand Jain if (ret) { 3718401b41e5SAnand Jain dev->last_flush_error = ret; 371966b4993eSDavid Sterba btrfs_dev_stat_inc_and_print(dev, 372066b4993eSDavid Sterba BTRFS_DEV_STAT_FLUSH_ERRS); 37215af3e8ccSStefan Behrens errors_wait++; 3722387125fcSChris Mason } 3723401b41e5SAnand Jain } 3724401b41e5SAnand Jain 3725cea7c8bfSAnand Jain if (errors_wait) { 3726401b41e5SAnand Jain /* 3727401b41e5SAnand Jain * At some point we need the status of all disks 3728401b41e5SAnand Jain * to arrive at the volume status. So error checking 3729401b41e5SAnand Jain * is being pushed to a separate loop. 3730401b41e5SAnand Jain */ 3731d10b82feSQu Wenruo return check_barrier_error(info); 3732401b41e5SAnand Jain } 3733387125fcSChris Mason return 0; 3734387125fcSChris Mason } 3735387125fcSChris Mason 3736943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3737943c6e99SZhao Lei { 37388789f4feSZhao Lei int raid_type; 37398789f4feSZhao Lei int min_tolerated = INT_MAX; 3740943c6e99SZhao Lei 37418789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 37428789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 37438c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 37448789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 37458789f4feSZhao Lei tolerated_failures); 3746943c6e99SZhao Lei 37478789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 37488789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 37498789f4feSZhao Lei continue; 375041a6e891SAnand Jain if (!(flags & btrfs_raid_array[raid_type].bg_flag)) 37518789f4feSZhao Lei continue; 37528c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 37538789f4feSZhao Lei btrfs_raid_array[raid_type]. 37548789f4feSZhao Lei tolerated_failures); 37558789f4feSZhao Lei } 3756943c6e99SZhao Lei 37578789f4feSZhao Lei if (min_tolerated == INT_MAX) { 3758ab8d0fc4SJeff Mahoney pr_warn("BTRFS: unknown raid flag: %llu", flags); 37598789f4feSZhao Lei min_tolerated = 0; 37608789f4feSZhao Lei } 37618789f4feSZhao Lei 37628789f4feSZhao Lei return min_tolerated; 3763943c6e99SZhao Lei } 3764943c6e99SZhao Lei 3765eece6a9cSDavid Sterba int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) 3766f2984462SChris Mason { 3767e5e9a520SChris Mason struct list_head *head; 3768f2984462SChris Mason struct btrfs_device *dev; 3769a061fc8dSChris Mason struct btrfs_super_block *sb; 3770f2984462SChris Mason struct btrfs_dev_item *dev_item; 3771f2984462SChris Mason int ret; 3772f2984462SChris Mason int do_barriers; 3773a236aed1SChris Mason int max_errors; 3774a236aed1SChris Mason int total_errors = 0; 3775a061fc8dSChris Mason u64 flags; 3776f2984462SChris Mason 37770b246afaSJeff Mahoney do_barriers = !btrfs_test_opt(fs_info, NOBARRIER); 3778fed3b381SLiu Bo 3779fed3b381SLiu Bo /* 3780fed3b381SLiu Bo * max_mirrors == 0 indicates we're from commit_transaction, 3781fed3b381SLiu Bo * not from fsync where the tree roots in fs_info have not 3782fed3b381SLiu Bo * been consistent on disk. 3783fed3b381SLiu Bo */ 3784fed3b381SLiu Bo if (max_mirrors == 0) 37850b246afaSJeff Mahoney backup_super_roots(fs_info); 3786f2984462SChris Mason 37870b246afaSJeff Mahoney sb = fs_info->super_for_commit; 3788a061fc8dSChris Mason dev_item = &sb->dev_item; 3789e5e9a520SChris Mason 37900b246afaSJeff Mahoney mutex_lock(&fs_info->fs_devices->device_list_mutex); 37910b246afaSJeff Mahoney head = &fs_info->fs_devices->devices; 37920b246afaSJeff Mahoney max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1; 3793387125fcSChris Mason 37945af3e8ccSStefan Behrens if (do_barriers) { 37950b246afaSJeff Mahoney ret = barrier_all_devices(fs_info); 37965af3e8ccSStefan Behrens if (ret) { 37975af3e8ccSStefan Behrens mutex_unlock( 37980b246afaSJeff Mahoney &fs_info->fs_devices->device_list_mutex); 37990b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 38005af3e8ccSStefan Behrens "errors while submitting device barriers."); 38015af3e8ccSStefan Behrens return ret; 38025af3e8ccSStefan Behrens } 38035af3e8ccSStefan Behrens } 3804387125fcSChris Mason 38051538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3806dfe25020SChris Mason if (!dev->bdev) { 3807dfe25020SChris Mason total_errors++; 3808dfe25020SChris Mason continue; 3809dfe25020SChris Mason } 3810e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3811ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3812dfe25020SChris Mason continue; 3813dfe25020SChris Mason 38142b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3815a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3816a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 38177df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3818935e5cc9SMiao Xie dev->commit_total_bytes); 3819ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3820ce7213c7SMiao Xie dev->commit_bytes_used); 3821a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3822a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3823a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3824a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 38257239ff4bSNikolay Borisov memcpy(dev_item->fsid, dev->fs_devices->metadata_uuid, 38267239ff4bSNikolay Borisov BTRFS_FSID_SIZE); 3827a512bbf8SYan Zheng 3828a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3829a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3830f2984462SChris Mason 383175cb857dSQu Wenruo ret = btrfs_validate_write_super(fs_info, sb); 383275cb857dSQu Wenruo if (ret < 0) { 383375cb857dSQu Wenruo mutex_unlock(&fs_info->fs_devices->device_list_mutex); 383475cb857dSQu Wenruo btrfs_handle_fs_error(fs_info, -EUCLEAN, 383575cb857dSQu Wenruo "unexpected superblock corruption detected"); 383675cb857dSQu Wenruo return -EUCLEAN; 383775cb857dSQu Wenruo } 383875cb857dSQu Wenruo 3839abbb3b8eSDavid Sterba ret = write_dev_supers(dev, sb, max_mirrors); 3840a236aed1SChris Mason if (ret) 3841a236aed1SChris Mason total_errors++; 3842f2984462SChris Mason } 3843a236aed1SChris Mason if (total_errors > max_errors) { 38440b246afaSJeff Mahoney btrfs_err(fs_info, "%d errors while writing supers", 3845d397712bSChris Mason total_errors); 38460b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 384779787eaaSJeff Mahoney 38489d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 38490b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 38500b246afaSJeff Mahoney "%d errors while writing supers", 38510b246afaSJeff Mahoney total_errors); 38529d565ba4SStefan Behrens return -EIO; 3853a236aed1SChris Mason } 3854f2984462SChris Mason 3855a512bbf8SYan Zheng total_errors = 0; 38561538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3857dfe25020SChris Mason if (!dev->bdev) 3858dfe25020SChris Mason continue; 3859e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3860ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3861dfe25020SChris Mason continue; 3862dfe25020SChris Mason 3863abbb3b8eSDavid Sterba ret = wait_dev_supers(dev, max_mirrors); 3864a512bbf8SYan Zheng if (ret) 38651259ab75SChris Mason total_errors++; 3866f2984462SChris Mason } 38670b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 3868a236aed1SChris Mason if (total_errors > max_errors) { 38690b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 38700b246afaSJeff Mahoney "%d errors while writing supers", 38710b246afaSJeff Mahoney total_errors); 387279787eaaSJeff Mahoney return -EIO; 3873a236aed1SChris Mason } 3874f2984462SChris Mason return 0; 3875f2984462SChris Mason } 3876f2984462SChris Mason 3877cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3878cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3879cb517eabSMiao Xie struct btrfs_root *root) 38802619ba1fSChris Mason { 38814785e24fSJosef Bacik bool drop_ref = false; 38824785e24fSJosef Bacik 38834df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 38842619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 38852619ba1fSChris Mason (unsigned long)root->root_key.objectid); 3886af01d2e5SJosef Bacik if (test_and_clear_bit(BTRFS_ROOT_IN_RADIX, &root->state)) 38874785e24fSJosef Bacik drop_ref = true; 38884df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 388976dda93cSYan, Zheng 38901c1ea4f7SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 38913321719eSLiu Bo btrfs_free_log(NULL, root); 38921c1ea4f7SLiu Bo if (root->reloc_root) { 389300246528SJosef Bacik btrfs_put_root(root->reloc_root); 38941c1ea4f7SLiu Bo root->reloc_root = NULL; 38951c1ea4f7SLiu Bo } 38961c1ea4f7SLiu Bo } 38973321719eSLiu Bo 3898faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3899581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3900faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3901581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 39020e996e7fSJosef Bacik if (root->ino_cache_inode) { 39030e996e7fSJosef Bacik iput(root->ino_cache_inode); 39040e996e7fSJosef Bacik root->ino_cache_inode = NULL; 39050e996e7fSJosef Bacik } 39064785e24fSJosef Bacik if (drop_ref) 390700246528SJosef Bacik btrfs_put_root(root); 39082619ba1fSChris Mason } 39092619ba1fSChris Mason 3910c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3911c146afadSYan Zheng { 3912c146afadSYan Zheng u64 root_objectid = 0; 3913c146afadSYan Zheng struct btrfs_root *gang[8]; 391465d33fd7SQu Wenruo int i = 0; 391565d33fd7SQu Wenruo int err = 0; 391665d33fd7SQu Wenruo unsigned int ret = 0; 3917c146afadSYan Zheng 3918c146afadSYan Zheng while (1) { 3919efc34534SJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 3920c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3921c146afadSYan Zheng (void **)gang, root_objectid, 3922c146afadSYan Zheng ARRAY_SIZE(gang)); 392365d33fd7SQu Wenruo if (!ret) { 3924efc34534SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 3925c146afadSYan Zheng break; 392665d33fd7SQu Wenruo } 39275d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 392866b4ffd1SJosef Bacik 392965d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 393065d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 393165d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 393265d33fd7SQu Wenruo gang[i] = NULL; 393365d33fd7SQu Wenruo continue; 393465d33fd7SQu Wenruo } 393565d33fd7SQu Wenruo /* grab all the search result for later use */ 393600246528SJosef Bacik gang[i] = btrfs_grab_root(gang[i]); 393765d33fd7SQu Wenruo } 3938efc34534SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 393965d33fd7SQu Wenruo 394065d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 394165d33fd7SQu Wenruo if (!gang[i]) 394265d33fd7SQu Wenruo continue; 3943c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 394466b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 394566b4ffd1SJosef Bacik if (err) 394665d33fd7SQu Wenruo break; 394700246528SJosef Bacik btrfs_put_root(gang[i]); 3948c146afadSYan Zheng } 3949c146afadSYan Zheng root_objectid++; 3950c146afadSYan Zheng } 395165d33fd7SQu Wenruo 395265d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 395365d33fd7SQu Wenruo for (; i < ret; i++) { 395465d33fd7SQu Wenruo if (gang[i]) 395500246528SJosef Bacik btrfs_put_root(gang[i]); 395665d33fd7SQu Wenruo } 395765d33fd7SQu Wenruo return err; 3958c146afadSYan Zheng } 3959c146afadSYan Zheng 39606bccf3abSJeff Mahoney int btrfs_commit_super(struct btrfs_fs_info *fs_info) 3961c146afadSYan Zheng { 39626bccf3abSJeff Mahoney struct btrfs_root *root = fs_info->tree_root; 3963c146afadSYan Zheng struct btrfs_trans_handle *trans; 3964c146afadSYan Zheng 39650b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 39662ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 39670b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 39680b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 3969c71bf099SYan, Zheng 3970c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 39710b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 39720b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 3973c71bf099SYan, Zheng 39747a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 39753612b495STsutomu Itoh if (IS_ERR(trans)) 39763612b495STsutomu Itoh return PTR_ERR(trans); 39773a45bb20SJeff Mahoney return btrfs_commit_transaction(trans); 3978c146afadSYan Zheng } 3979c146afadSYan Zheng 3980b105e927SDavid Sterba void __cold close_ctree(struct btrfs_fs_info *fs_info) 3981eb60ceacSChris Mason { 3982c146afadSYan Zheng int ret; 3983e089f05cSChris Mason 3984afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); 3985d6fd0ae2SOmar Sandoval /* 3986d6fd0ae2SOmar Sandoval * We don't want the cleaner to start new transactions, add more delayed 3987d6fd0ae2SOmar Sandoval * iputs, etc. while we're closing. We can't use kthread_stop() yet 3988d6fd0ae2SOmar Sandoval * because that frees the task_struct, and the transaction kthread might 3989d6fd0ae2SOmar Sandoval * still try to wake up the cleaner. 3990d6fd0ae2SOmar Sandoval */ 3991d6fd0ae2SOmar Sandoval kthread_park(fs_info->cleaner_kthread); 3992a2135011SChris Mason 39937343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 3994d06f23d6SJeff Mahoney btrfs_qgroup_wait_for_completion(fs_info, false); 39957343dd61SJustin Maggard 3996803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 3997803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 3998803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 3999803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 4000803b2f54SStefan Behrens 4001837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 4002aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 4003837d5b6eSIlya Dryomov 40048dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 40058dabb742SStefan Behrens 4006aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 40074cb5300bSChris Mason 40084cb5300bSChris Mason /* wait for any defraggers to finish */ 40094cb5300bSChris Mason wait_event(fs_info->transaction_wait, 40104cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 40114cb5300bSChris Mason 40124cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 401326176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 40144cb5300bSChris Mason 401521c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 401621c7e756SMiao Xie 4017b0643e59SDennis Zhou /* Cancel or finish ongoing discard work */ 4018b0643e59SDennis Zhou btrfs_discard_cleanup(fs_info); 4019b0643e59SDennis Zhou 4020bc98a42cSDavid Howells if (!sb_rdonly(fs_info->sb)) { 4021e44163e1SJeff Mahoney /* 4022d6fd0ae2SOmar Sandoval * The cleaner kthread is stopped, so do one final pass over 4023d6fd0ae2SOmar Sandoval * unused block groups. 4024e44163e1SJeff Mahoney */ 40250b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 4026e44163e1SJeff Mahoney 4027f0cc2cd7SFilipe Manana /* 4028f0cc2cd7SFilipe Manana * There might be existing delayed inode workers still running 4029f0cc2cd7SFilipe Manana * and holding an empty delayed inode item. We must wait for 4030f0cc2cd7SFilipe Manana * them to complete first because they can create a transaction. 4031f0cc2cd7SFilipe Manana * This happens when someone calls btrfs_balance_delayed_items() 4032f0cc2cd7SFilipe Manana * and then a transaction commit runs the same delayed nodes 4033f0cc2cd7SFilipe Manana * before any delayed worker has done something with the nodes. 4034f0cc2cd7SFilipe Manana * We must wait for any worker here and not at transaction 4035f0cc2cd7SFilipe Manana * commit time since that could cause a deadlock. 4036f0cc2cd7SFilipe Manana * This is a very rare case. 4037f0cc2cd7SFilipe Manana */ 4038f0cc2cd7SFilipe Manana btrfs_flush_workqueue(fs_info->delayed_workers); 4039f0cc2cd7SFilipe Manana 40406bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 4041d397712bSChris Mason if (ret) 404204892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 4043c146afadSYan Zheng } 4044ed2ff2cbSChris Mason 4045af722733SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state) || 4046af722733SLiu Bo test_bit(BTRFS_FS_STATE_TRANS_ABORTED, &fs_info->fs_state)) 40472ff7e61eSJeff Mahoney btrfs_error_commit_super(fs_info); 4048acce952bSliubo 4049e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 4050e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 40518929ecfaSYan, Zheng 4052e187831eSJosef Bacik ASSERT(list_empty(&fs_info->delayed_iputs)); 4053afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); 4054f25784b3SYan Zheng 405504892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 4056fe816d0fSNikolay Borisov ASSERT(list_empty(&fs_info->delalloc_roots)); 4057bcef60f2SArne Jansen 4058963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 405904892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 4060963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 4061b0c68f8bSChris Mason } 406231153d81SYan Zheng 40634297ff84SJosef Bacik if (percpu_counter_sum(&fs_info->dio_bytes)) 40644297ff84SJosef Bacik btrfs_info(fs_info, "at unmount dio bytes count %lld", 40654297ff84SJosef Bacik percpu_counter_sum(&fs_info->dio_bytes)); 40664297ff84SJosef Bacik 40676618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 4068b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 40695ac1d209SJeff Mahoney 40701a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 40711a4319ccSLiu Bo 4072de348ee0SWang Shilong /* 4073de348ee0SWang Shilong * we must make sure there is not any read request to 4074de348ee0SWang Shilong * submit after we stopping all workers. 4075de348ee0SWang Shilong */ 4076de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 407796192499SJosef Bacik btrfs_stop_all_workers(fs_info); 407896192499SJosef Bacik 4079afcdd129SJosef Bacik clear_bit(BTRFS_FS_OPEN, &fs_info->flags); 40804273eaffSAnand Jain free_root_pointers(fs_info, true); 40818c38938cSJosef Bacik btrfs_free_fs_roots(fs_info); 40829ad6b7bcSChris Mason 40834e19443dSJosef Bacik /* 40844e19443dSJosef Bacik * We must free the block groups after dropping the fs_roots as we could 40854e19443dSJosef Bacik * have had an IO error and have left over tree log blocks that aren't 40864e19443dSJosef Bacik * cleaned up until the fs roots are freed. This makes the block group 40874e19443dSJosef Bacik * accounting appear to be wrong because there's pending reserved bytes, 40884e19443dSJosef Bacik * so make sure we do the block group cleanup afterwards. 40894e19443dSJosef Bacik */ 40904e19443dSJosef Bacik btrfs_free_block_groups(fs_info); 40914e19443dSJosef Bacik 409213e6c37bSJosef Bacik iput(fs_info->btree_inode); 4093d6bfde87SChris Mason 409421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 40950b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) 40962ff7e61eSJeff Mahoney btrfsic_unmount(fs_info->fs_devices); 409721adbd5cSStefan Behrens #endif 409821adbd5cSStefan Behrens 40990b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 410068c94e55SNikolay Borisov btrfs_close_devices(fs_info->fs_devices); 4101eb60ceacSChris Mason } 4102eb60ceacSChris Mason 4103b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 4104b9fab919SChris Mason int atomic) 4105ccd467d6SChris Mason { 41061259ab75SChris Mason int ret; 4107727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 41081259ab75SChris Mason 41090b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 41101259ab75SChris Mason if (!ret) 41111259ab75SChris Mason return ret; 41121259ab75SChris Mason 41131259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 4114b9fab919SChris Mason parent_transid, atomic); 4115b9fab919SChris Mason if (ret == -EAGAIN) 4116b9fab919SChris Mason return ret; 41171259ab75SChris Mason return !ret; 41185f39d397SChris Mason } 41196702ed49SChris Mason 41205f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 41215f39d397SChris Mason { 41220b246afaSJeff Mahoney struct btrfs_fs_info *fs_info; 412306ea65a3SJosef Bacik struct btrfs_root *root; 41245f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 4125b9473439SChris Mason int was_dirty; 4126b4ce94deSChris Mason 412706ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 412806ea65a3SJosef Bacik /* 412906ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 413052042d8eSAndrea Gelmini * enabled. Normal people shouldn't be using unmapped buffers as dirty 413106ea65a3SJosef Bacik * outside of the sanity tests. 413206ea65a3SJosef Bacik */ 4133b0132a3bSNikolay Borisov if (unlikely(test_bit(EXTENT_BUFFER_UNMAPPED, &buf->bflags))) 413406ea65a3SJosef Bacik return; 413506ea65a3SJosef Bacik #endif 413606ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 41370b246afaSJeff Mahoney fs_info = root->fs_info; 4138b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 41390b246afaSJeff Mahoney if (transid != fs_info->generation) 41405d163e0eSJeff Mahoney WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", 41410b246afaSJeff Mahoney buf->start, transid, fs_info->generation); 41420b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 4143e2d84521SMiao Xie if (!was_dirty) 4144104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 4145e2d84521SMiao Xie buf->len, 41460b246afaSJeff Mahoney fs_info->dirty_metadata_batch); 41471f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 414869fc6cbbSQu Wenruo /* 414969fc6cbbSQu Wenruo * Since btrfs_mark_buffer_dirty() can be called with item pointer set 415069fc6cbbSQu Wenruo * but item data not updated. 415169fc6cbbSQu Wenruo * So here we should only check item pointers, not item data. 415269fc6cbbSQu Wenruo */ 415369fc6cbbSQu Wenruo if (btrfs_header_level(buf) == 0 && 4154cfdaad5eSDavid Sterba btrfs_check_leaf_relaxed(buf)) { 4155a4f78750SDavid Sterba btrfs_print_leaf(buf); 41561f21ef0aSFilipe Manana ASSERT(0); 41571f21ef0aSFilipe Manana } 41581f21ef0aSFilipe Manana #endif 4159eb60ceacSChris Mason } 4160eb60ceacSChris Mason 41612ff7e61eSJeff Mahoney static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info, 4162b53d3f5dSLiu Bo int flush_delayed) 416335b7e476SChris Mason { 4164188de649SChris Mason /* 4165188de649SChris Mason * looks as though older kernels can get into trouble with 4166188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4167188de649SChris Mason */ 4168e2d84521SMiao Xie int ret; 4169d6bfde87SChris Mason 41706933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4171d6bfde87SChris Mason return; 4172d6bfde87SChris Mason 4173b53d3f5dSLiu Bo if (flush_delayed) 41742ff7e61eSJeff Mahoney btrfs_balance_delayed_items(fs_info); 417516cdcec7SMiao Xie 4176d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 4177d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 4178d814a491SEthan Lien fs_info->dirty_metadata_batch); 4179e2d84521SMiao Xie if (ret > 0) { 41800b246afaSJeff Mahoney balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping); 418116cdcec7SMiao Xie } 418216cdcec7SMiao Xie } 418316cdcec7SMiao Xie 41842ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info) 418516cdcec7SMiao Xie { 41862ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 1); 418735b7e476SChris Mason } 4188b53d3f5dSLiu Bo 41892ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info) 4190b53d3f5dSLiu Bo { 41912ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 0); 4192d6bfde87SChris Mason } 41936b80053dSChris Mason 4194581c1760SQu Wenruo int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, 4195581c1760SQu Wenruo struct btrfs_key *first_key) 41966b80053dSChris Mason { 41975ab12d1fSDavid Sterba return btree_read_extent_buffer_pages(buf, parent_transid, 4198581c1760SQu Wenruo level, first_key); 41996b80053dSChris Mason } 42000da5468fSChris Mason 42012ff7e61eSJeff Mahoney static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info) 4202acce952bSliubo { 4203fe816d0fSNikolay Borisov /* cleanup FS via transaction */ 4204fe816d0fSNikolay Borisov btrfs_cleanup_transaction(fs_info); 4205fe816d0fSNikolay Borisov 42060b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 42072ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 42080b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 4209acce952bSliubo 42100b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 42110b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 4212acce952bSliubo } 4213acce952bSliubo 4214143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4215acce952bSliubo { 4216acce952bSliubo struct btrfs_ordered_extent *ordered; 4217acce952bSliubo 4218199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4219779880efSJosef Bacik /* 4220779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4221779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4222779880efSJosef Bacik */ 4223199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4224779880efSJosef Bacik root_extent_list) 4225779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4226199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4227199c2a9cSMiao Xie } 4228199c2a9cSMiao Xie 4229199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4230199c2a9cSMiao Xie { 4231199c2a9cSMiao Xie struct btrfs_root *root; 4232199c2a9cSMiao Xie struct list_head splice; 4233199c2a9cSMiao Xie 4234199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4235199c2a9cSMiao Xie 4236199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4237199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4238199c2a9cSMiao Xie while (!list_empty(&splice)) { 4239199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4240199c2a9cSMiao Xie ordered_root); 42411de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 42421de2cfdeSJosef Bacik &fs_info->ordered_roots); 4243199c2a9cSMiao Xie 42442a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4245199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4246199c2a9cSMiao Xie 42472a85d9caSLiu Bo cond_resched(); 42482a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4249199c2a9cSMiao Xie } 4250199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 425174d5d229SJosef Bacik 425274d5d229SJosef Bacik /* 425374d5d229SJosef Bacik * We need this here because if we've been flipped read-only we won't 425474d5d229SJosef Bacik * get sync() from the umount, so we need to make sure any ordered 425574d5d229SJosef Bacik * extents that haven't had their dirty pages IO start writeout yet 425674d5d229SJosef Bacik * actually get run and error out properly. 425774d5d229SJosef Bacik */ 425874d5d229SJosef Bacik btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1); 4259acce952bSliubo } 4260acce952bSliubo 426135a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 42622ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4263acce952bSliubo { 4264acce952bSliubo struct rb_node *node; 4265acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4266acce952bSliubo struct btrfs_delayed_ref_node *ref; 4267acce952bSliubo int ret = 0; 4268acce952bSliubo 4269acce952bSliubo delayed_refs = &trans->delayed_refs; 4270acce952bSliubo 4271acce952bSliubo spin_lock(&delayed_refs->lock); 4272d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4273cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 4274b79ce3ddSDavid Sterba btrfs_debug(fs_info, "delayed_refs has NO entry"); 4275acce952bSliubo return ret; 4276acce952bSliubo } 4277acce952bSliubo 42785c9d028bSLiu Bo while ((node = rb_first_cached(&delayed_refs->href_root)) != NULL) { 4279d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 42800e0adbcfSJosef Bacik struct rb_node *n; 4281e78417d1SJosef Bacik bool pin_bytes = false; 4282acce952bSliubo 4283d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4284d7df2c79SJosef Bacik href_node); 42853069bd26SJosef Bacik if (btrfs_delayed_ref_lock(delayed_refs, head)) 4286b939d1abSJosef Bacik continue; 42873069bd26SJosef Bacik 4288d7df2c79SJosef Bacik spin_lock(&head->lock); 4289e3d03965SLiu Bo while ((n = rb_first_cached(&head->ref_tree)) != NULL) { 42900e0adbcfSJosef Bacik ref = rb_entry(n, struct btrfs_delayed_ref_node, 42910e0adbcfSJosef Bacik ref_node); 4292d7df2c79SJosef Bacik ref->in_tree = 0; 4293e3d03965SLiu Bo rb_erase_cached(&ref->ref_node, &head->ref_tree); 42940e0adbcfSJosef Bacik RB_CLEAR_NODE(&ref->ref_node); 42951d57ee94SWang Xiaoguang if (!list_empty(&ref->add_list)) 42961d57ee94SWang Xiaoguang list_del(&ref->add_list); 4297d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4298d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4299d7df2c79SJosef Bacik } 430054067ae9SJosef Bacik if (head->must_insert_reserved) 4301e78417d1SJosef Bacik pin_bytes = true; 430278a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4303fa781ceaSJosef Bacik btrfs_delete_ref_head(delayed_refs, head); 4304d7df2c79SJosef Bacik spin_unlock(&head->lock); 4305acce952bSliubo spin_unlock(&delayed_refs->lock); 4306e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4307acce952bSliubo 4308f603bb94SNikolay Borisov if (pin_bytes) { 4309f603bb94SNikolay Borisov struct btrfs_block_group *cache; 4310f603bb94SNikolay Borisov 4311f603bb94SNikolay Borisov cache = btrfs_lookup_block_group(fs_info, head->bytenr); 4312f603bb94SNikolay Borisov BUG_ON(!cache); 4313f603bb94SNikolay Borisov 4314f603bb94SNikolay Borisov spin_lock(&cache->space_info->lock); 4315f603bb94SNikolay Borisov spin_lock(&cache->lock); 4316f603bb94SNikolay Borisov cache->pinned += head->num_bytes; 4317f603bb94SNikolay Borisov btrfs_space_info_update_bytes_pinned(fs_info, 4318f603bb94SNikolay Borisov cache->space_info, head->num_bytes); 4319f603bb94SNikolay Borisov cache->reserved -= head->num_bytes; 4320f603bb94SNikolay Borisov cache->space_info->bytes_reserved -= head->num_bytes; 4321f603bb94SNikolay Borisov spin_unlock(&cache->lock); 4322f603bb94SNikolay Borisov spin_unlock(&cache->space_info->lock); 4323f603bb94SNikolay Borisov percpu_counter_add_batch( 4324f603bb94SNikolay Borisov &cache->space_info->total_bytes_pinned, 4325f603bb94SNikolay Borisov head->num_bytes, BTRFS_TOTAL_BYTES_PINNED_BATCH); 4326f603bb94SNikolay Borisov 4327f603bb94SNikolay Borisov btrfs_put_block_group(cache); 4328f603bb94SNikolay Borisov 4329f603bb94SNikolay Borisov btrfs_error_unpin_extent_range(fs_info, head->bytenr, 4330f603bb94SNikolay Borisov head->bytenr + head->num_bytes - 1); 4331f603bb94SNikolay Borisov } 433231890da0SJosef Bacik btrfs_cleanup_ref_head_accounting(fs_info, delayed_refs, head); 4333d278850eSJosef Bacik btrfs_put_delayed_ref_head(head); 4334acce952bSliubo cond_resched(); 4335acce952bSliubo spin_lock(&delayed_refs->lock); 4336acce952bSliubo } 433781f7eb00SJeff Mahoney btrfs_qgroup_destroy_extent_records(trans); 4338acce952bSliubo 4339acce952bSliubo spin_unlock(&delayed_refs->lock); 4340acce952bSliubo 4341acce952bSliubo return ret; 4342acce952bSliubo } 4343acce952bSliubo 4344143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4345acce952bSliubo { 4346acce952bSliubo struct btrfs_inode *btrfs_inode; 4347acce952bSliubo struct list_head splice; 4348acce952bSliubo 4349acce952bSliubo INIT_LIST_HEAD(&splice); 4350acce952bSliubo 4351eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4352eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4353acce952bSliubo 4354acce952bSliubo while (!list_empty(&splice)) { 4355fe816d0fSNikolay Borisov struct inode *inode = NULL; 4356eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4357acce952bSliubo delalloc_inodes); 4358fe816d0fSNikolay Borisov __btrfs_del_delalloc_inode(root, btrfs_inode); 4359eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4360acce952bSliubo 4361fe816d0fSNikolay Borisov /* 4362fe816d0fSNikolay Borisov * Make sure we get a live inode and that it'll not disappear 4363fe816d0fSNikolay Borisov * meanwhile. 4364fe816d0fSNikolay Borisov */ 4365fe816d0fSNikolay Borisov inode = igrab(&btrfs_inode->vfs_inode); 4366fe816d0fSNikolay Borisov if (inode) { 4367fe816d0fSNikolay Borisov invalidate_inode_pages2(inode->i_mapping); 4368fe816d0fSNikolay Borisov iput(inode); 4369fe816d0fSNikolay Borisov } 4370eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4371acce952bSliubo } 4372eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4373eb73c1b7SMiao Xie } 4374eb73c1b7SMiao Xie 4375eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4376eb73c1b7SMiao Xie { 4377eb73c1b7SMiao Xie struct btrfs_root *root; 4378eb73c1b7SMiao Xie struct list_head splice; 4379eb73c1b7SMiao Xie 4380eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4381eb73c1b7SMiao Xie 4382eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4383eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4384eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4385eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4386eb73c1b7SMiao Xie delalloc_root); 438700246528SJosef Bacik root = btrfs_grab_root(root); 4388eb73c1b7SMiao Xie BUG_ON(!root); 4389eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4390eb73c1b7SMiao Xie 4391eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 439200246528SJosef Bacik btrfs_put_root(root); 4393eb73c1b7SMiao Xie 4394eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4395eb73c1b7SMiao Xie } 4396eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4397acce952bSliubo } 4398acce952bSliubo 43992ff7e61eSJeff Mahoney static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, 4400acce952bSliubo struct extent_io_tree *dirty_pages, 4401acce952bSliubo int mark) 4402acce952bSliubo { 4403acce952bSliubo int ret; 4404acce952bSliubo struct extent_buffer *eb; 4405acce952bSliubo u64 start = 0; 4406acce952bSliubo u64 end; 4407acce952bSliubo 4408acce952bSliubo while (1) { 4409acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4410e6138876SJosef Bacik mark, NULL); 4411acce952bSliubo if (ret) 4412acce952bSliubo break; 4413acce952bSliubo 441491166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4415acce952bSliubo while (start <= end) { 44160b246afaSJeff Mahoney eb = find_extent_buffer(fs_info, start); 44170b246afaSJeff Mahoney start += fs_info->nodesize; 4418fd8b2b61SJosef Bacik if (!eb) 4419acce952bSliubo continue; 4420fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4421acce952bSliubo 4422fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4423fd8b2b61SJosef Bacik &eb->bflags)) 4424fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4425fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4426acce952bSliubo } 4427acce952bSliubo } 4428acce952bSliubo 4429acce952bSliubo return ret; 4430acce952bSliubo } 4431acce952bSliubo 44322ff7e61eSJeff Mahoney static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, 4433fe119a6eSNikolay Borisov struct extent_io_tree *unpin) 4434acce952bSliubo { 4435acce952bSliubo u64 start; 4436acce952bSliubo u64 end; 4437acce952bSliubo int ret; 4438acce952bSliubo 4439acce952bSliubo while (1) { 44400e6ec385SFilipe Manana struct extent_state *cached_state = NULL; 44410e6ec385SFilipe Manana 4442fcd5e742SLu Fengqi /* 4443fcd5e742SLu Fengqi * The btrfs_finish_extent_commit() may get the same range as 4444fcd5e742SLu Fengqi * ours between find_first_extent_bit and clear_extent_dirty. 4445fcd5e742SLu Fengqi * Hence, hold the unused_bg_unpin_mutex to avoid double unpin 4446fcd5e742SLu Fengqi * the same extent range. 4447fcd5e742SLu Fengqi */ 4448fcd5e742SLu Fengqi mutex_lock(&fs_info->unused_bg_unpin_mutex); 4449acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 44500e6ec385SFilipe Manana EXTENT_DIRTY, &cached_state); 4451fcd5e742SLu Fengqi if (ret) { 4452fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4453acce952bSliubo break; 4454fcd5e742SLu Fengqi } 4455acce952bSliubo 44560e6ec385SFilipe Manana clear_extent_dirty(unpin, start, end, &cached_state); 44570e6ec385SFilipe Manana free_extent_state(cached_state); 44582ff7e61eSJeff Mahoney btrfs_error_unpin_extent_range(fs_info, start, end); 4459fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4460acce952bSliubo cond_resched(); 4461acce952bSliubo } 4462acce952bSliubo 4463acce952bSliubo return 0; 4464acce952bSliubo } 4465acce952bSliubo 446632da5386SDavid Sterba static void btrfs_cleanup_bg_io(struct btrfs_block_group *cache) 4467c79a1751SLiu Bo { 4468c79a1751SLiu Bo struct inode *inode; 4469c79a1751SLiu Bo 4470c79a1751SLiu Bo inode = cache->io_ctl.inode; 4471c79a1751SLiu Bo if (inode) { 4472c79a1751SLiu Bo invalidate_inode_pages2(inode->i_mapping); 4473c79a1751SLiu Bo BTRFS_I(inode)->generation = 0; 4474c79a1751SLiu Bo cache->io_ctl.inode = NULL; 4475c79a1751SLiu Bo iput(inode); 4476c79a1751SLiu Bo } 4477c79a1751SLiu Bo btrfs_put_block_group(cache); 4478c79a1751SLiu Bo } 4479c79a1751SLiu Bo 4480c79a1751SLiu Bo void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, 44812ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4482c79a1751SLiu Bo { 448332da5386SDavid Sterba struct btrfs_block_group *cache; 4484c79a1751SLiu Bo 4485c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4486c79a1751SLiu Bo while (!list_empty(&cur_trans->dirty_bgs)) { 4487c79a1751SLiu Bo cache = list_first_entry(&cur_trans->dirty_bgs, 448832da5386SDavid Sterba struct btrfs_block_group, 4489c79a1751SLiu Bo dirty_list); 4490c79a1751SLiu Bo 4491c79a1751SLiu Bo if (!list_empty(&cache->io_list)) { 4492c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4493c79a1751SLiu Bo list_del_init(&cache->io_list); 4494c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4495c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4496c79a1751SLiu Bo } 4497c79a1751SLiu Bo 4498c79a1751SLiu Bo list_del_init(&cache->dirty_list); 4499c79a1751SLiu Bo spin_lock(&cache->lock); 4500c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4501c79a1751SLiu Bo spin_unlock(&cache->lock); 4502c79a1751SLiu Bo 4503c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4504c79a1751SLiu Bo btrfs_put_block_group(cache); 4505ba2c4d4eSJosef Bacik btrfs_delayed_refs_rsv_release(fs_info, 1); 4506c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4507c79a1751SLiu Bo } 4508c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4509c79a1751SLiu Bo 451045ae2c18SNikolay Borisov /* 451145ae2c18SNikolay Borisov * Refer to the definition of io_bgs member for details why it's safe 451245ae2c18SNikolay Borisov * to use it without any locking 451345ae2c18SNikolay Borisov */ 4514c79a1751SLiu Bo while (!list_empty(&cur_trans->io_bgs)) { 4515c79a1751SLiu Bo cache = list_first_entry(&cur_trans->io_bgs, 451632da5386SDavid Sterba struct btrfs_block_group, 4517c79a1751SLiu Bo io_list); 4518c79a1751SLiu Bo 4519c79a1751SLiu Bo list_del_init(&cache->io_list); 4520c79a1751SLiu Bo spin_lock(&cache->lock); 4521c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4522c79a1751SLiu Bo spin_unlock(&cache->lock); 4523c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4524c79a1751SLiu Bo } 4525c79a1751SLiu Bo } 4526c79a1751SLiu Bo 452749b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 45282ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 452949b25e05SJeff Mahoney { 4530bbbf7243SNikolay Borisov struct btrfs_device *dev, *tmp; 4531bbbf7243SNikolay Borisov 45322ff7e61eSJeff Mahoney btrfs_cleanup_dirty_bgs(cur_trans, fs_info); 4533c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->dirty_bgs)); 4534c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->io_bgs)); 4535c79a1751SLiu Bo 4536bbbf7243SNikolay Borisov list_for_each_entry_safe(dev, tmp, &cur_trans->dev_update_list, 4537bbbf7243SNikolay Borisov post_commit_list) { 4538bbbf7243SNikolay Borisov list_del_init(&dev->post_commit_list); 4539bbbf7243SNikolay Borisov } 4540bbbf7243SNikolay Borisov 45412ff7e61eSJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, fs_info); 454249b25e05SJeff Mahoney 45434a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 45440b246afaSJeff Mahoney wake_up(&fs_info->transaction_blocked_wait); 454549b25e05SJeff Mahoney 45464a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 45470b246afaSJeff Mahoney wake_up(&fs_info->transaction_wait); 454849b25e05SJeff Mahoney 4549ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 455067cde344SMiao Xie 45512ff7e61eSJeff Mahoney btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages, 455249b25e05SJeff Mahoney EXTENT_DIRTY); 4553fe119a6eSNikolay Borisov btrfs_destroy_pinned_extent(fs_info, &cur_trans->pinned_extents); 455449b25e05SJeff Mahoney 45554a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 45564a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 455749b25e05SJeff Mahoney } 455849b25e05SJeff Mahoney 45592ff7e61eSJeff Mahoney static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info) 4560acce952bSliubo { 4561acce952bSliubo struct btrfs_transaction *t; 4562acce952bSliubo 45630b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 4564acce952bSliubo 45650b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 45660b246afaSJeff Mahoney while (!list_empty(&fs_info->trans_list)) { 45670b246afaSJeff Mahoney t = list_first_entry(&fs_info->trans_list, 4568724e2315SJosef Bacik struct btrfs_transaction, list); 4569724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 45709b64f57dSElena Reshetova refcount_inc(&t->use_count); 45710b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 45722ff7e61eSJeff Mahoney btrfs_wait_for_commit(fs_info, t->transid); 4573724e2315SJosef Bacik btrfs_put_transaction(t); 45740b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4575724e2315SJosef Bacik continue; 4576724e2315SJosef Bacik } 45770b246afaSJeff Mahoney if (t == fs_info->running_transaction) { 4578724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 45790b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4580724e2315SJosef Bacik /* 4581724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4582724e2315SJosef Bacik * handle open currently for this transaction. 4583724e2315SJosef Bacik */ 4584724e2315SJosef Bacik wait_event(t->writer_wait, 4585724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4586724e2315SJosef Bacik } else { 45870b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4588724e2315SJosef Bacik } 45892ff7e61eSJeff Mahoney btrfs_cleanup_one_transaction(t, fs_info); 4590724e2315SJosef Bacik 45910b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 45920b246afaSJeff Mahoney if (t == fs_info->running_transaction) 45930b246afaSJeff Mahoney fs_info->running_transaction = NULL; 4594724e2315SJosef Bacik list_del_init(&t->list); 45950b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4596a4abeea4SJosef Bacik 4597724e2315SJosef Bacik btrfs_put_transaction(t); 45982ff7e61eSJeff Mahoney trace_btrfs_transaction_commit(fs_info->tree_root); 45990b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4600724e2315SJosef Bacik } 46010b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 46020b246afaSJeff Mahoney btrfs_destroy_all_ordered_extents(fs_info); 4603ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 4604ccdf9b30SJeff Mahoney btrfs_assert_delayed_root_empty(fs_info); 46050b246afaSJeff Mahoney btrfs_destroy_all_delalloc_inodes(fs_info); 46060b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 4607acce952bSliubo 4608acce952bSliubo return 0; 4609acce952bSliubo } 4610acce952bSliubo 4611e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 46124d53dddbSDavid Sterba /* mandatory callbacks */ 46130b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 46144d53dddbSDavid Sterba .readpage_end_io_hook = btree_readpage_end_io_hook, 46150da5468fSChris Mason }; 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