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; 3611104a885SDavid Sterba 3621104a885SDavid Sterba /* 3631104a885SDavid Sterba * The super_block structure does not span the whole 36451bce6c9SJohannes Thumshirn * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space is 36551bce6c9SJohannes Thumshirn * filled with zeros and is included in the checksum. 3661104a885SDavid Sterba */ 367fd08001fSEric Biggers crypto_shash_digest(shash, raw_disk_sb + BTRFS_CSUM_SIZE, 368fd08001fSEric Biggers BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, result); 3691104a885SDavid Sterba 37051bce6c9SJohannes Thumshirn if (memcmp(disk_sb->csum, result, btrfs_super_csum_size(disk_sb))) 371e7e16f48SJohannes Thumshirn return 1; 3721104a885SDavid Sterba 373e7e16f48SJohannes Thumshirn return 0; 3741104a885SDavid Sterba } 3751104a885SDavid Sterba 376e064d5e9SDavid Sterba int btrfs_verify_level_key(struct extent_buffer *eb, int level, 377ff76a864SLiu Bo struct btrfs_key *first_key, u64 parent_transid) 378581c1760SQu Wenruo { 379e064d5e9SDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 380581c1760SQu Wenruo int found_level; 381581c1760SQu Wenruo struct btrfs_key found_key; 382581c1760SQu Wenruo int ret; 383581c1760SQu Wenruo 384581c1760SQu Wenruo found_level = btrfs_header_level(eb); 385581c1760SQu Wenruo if (found_level != level) { 38663489055SQu Wenruo WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG), 38763489055SQu Wenruo KERN_ERR "BTRFS: tree level check failed\n"); 388581c1760SQu Wenruo btrfs_err(fs_info, 389581c1760SQu Wenruo "tree level mismatch detected, bytenr=%llu level expected=%u has=%u", 390581c1760SQu Wenruo eb->start, level, found_level); 391581c1760SQu Wenruo return -EIO; 392581c1760SQu Wenruo } 393581c1760SQu Wenruo 394581c1760SQu Wenruo if (!first_key) 395581c1760SQu Wenruo return 0; 396581c1760SQu Wenruo 3975d41be6fSQu Wenruo /* 3985d41be6fSQu Wenruo * For live tree block (new tree blocks in current transaction), 3995d41be6fSQu Wenruo * we need proper lock context to avoid race, which is impossible here. 4005d41be6fSQu Wenruo * So we only checks tree blocks which is read from disk, whose 4015d41be6fSQu Wenruo * generation <= fs_info->last_trans_committed. 4025d41be6fSQu Wenruo */ 4035d41be6fSQu Wenruo if (btrfs_header_generation(eb) > fs_info->last_trans_committed) 4045d41be6fSQu Wenruo return 0; 40562fdaa52SQu Wenruo 40662fdaa52SQu Wenruo /* We have @first_key, so this @eb must have at least one item */ 40762fdaa52SQu Wenruo if (btrfs_header_nritems(eb) == 0) { 40862fdaa52SQu Wenruo btrfs_err(fs_info, 40962fdaa52SQu Wenruo "invalid tree nritems, bytenr=%llu nritems=0 expect >0", 41062fdaa52SQu Wenruo eb->start); 41162fdaa52SQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 41262fdaa52SQu Wenruo return -EUCLEAN; 41362fdaa52SQu Wenruo } 41462fdaa52SQu Wenruo 415581c1760SQu Wenruo if (found_level) 416581c1760SQu Wenruo btrfs_node_key_to_cpu(eb, &found_key, 0); 417581c1760SQu Wenruo else 418581c1760SQu Wenruo btrfs_item_key_to_cpu(eb, &found_key, 0); 419581c1760SQu Wenruo ret = btrfs_comp_cpu_keys(first_key, &found_key); 420581c1760SQu Wenruo 421581c1760SQu Wenruo if (ret) { 42263489055SQu Wenruo WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG), 42363489055SQu Wenruo KERN_ERR "BTRFS: tree first key check failed\n"); 424581c1760SQu Wenruo btrfs_err(fs_info, 425ff76a864SLiu Bo "tree first key mismatch detected, bytenr=%llu parent_transid=%llu key expected=(%llu,%u,%llu) has=(%llu,%u,%llu)", 426ff76a864SLiu Bo eb->start, parent_transid, first_key->objectid, 427ff76a864SLiu Bo first_key->type, first_key->offset, 428ff76a864SLiu Bo found_key.objectid, found_key.type, 429ff76a864SLiu Bo found_key.offset); 430581c1760SQu Wenruo } 431581c1760SQu Wenruo return ret; 432581c1760SQu Wenruo } 433581c1760SQu Wenruo 4341104a885SDavid Sterba /* 435d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 436d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 437581c1760SQu Wenruo * 438581c1760SQu Wenruo * @parent_transid: expected transid, skip check if 0 439581c1760SQu Wenruo * @level: expected level, mandatory check 440581c1760SQu Wenruo * @first_key: expected key of first slot, skip check if NULL 441d352ac68SChris Mason */ 4425ab12d1fSDavid Sterba static int btree_read_extent_buffer_pages(struct extent_buffer *eb, 443581c1760SQu Wenruo u64 parent_transid, int level, 444581c1760SQu Wenruo struct btrfs_key *first_key) 445f188591eSChris Mason { 4465ab12d1fSDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 447f188591eSChris Mason struct extent_io_tree *io_tree; 448ea466794SJosef Bacik int failed = 0; 449f188591eSChris Mason int ret; 450f188591eSChris Mason int num_copies = 0; 451f188591eSChris Mason int mirror_num = 0; 452ea466794SJosef Bacik int failed_mirror = 0; 453f188591eSChris Mason 4540b246afaSJeff Mahoney io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree; 455f188591eSChris Mason while (1) { 456f8397d69SNikolay Borisov clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 457c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(eb, WAIT_COMPLETE, mirror_num); 458256dd1bbSStefan Behrens if (!ret) { 459581c1760SQu Wenruo if (verify_parent_transid(io_tree, eb, 460b9fab919SChris Mason parent_transid, 0)) 461256dd1bbSStefan Behrens ret = -EIO; 462e064d5e9SDavid Sterba else if (btrfs_verify_level_key(eb, level, 463ff76a864SLiu Bo first_key, parent_transid)) 464581c1760SQu Wenruo ret = -EUCLEAN; 465581c1760SQu Wenruo else 466581c1760SQu Wenruo break; 467256dd1bbSStefan Behrens } 468d397712bSChris Mason 4690b246afaSJeff Mahoney num_copies = btrfs_num_copies(fs_info, 470f188591eSChris Mason eb->start, eb->len); 4714235298eSChris Mason if (num_copies == 1) 472ea466794SJosef Bacik break; 4734235298eSChris Mason 4745cf1ab56SJosef Bacik if (!failed_mirror) { 4755cf1ab56SJosef Bacik failed = 1; 4765cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4775cf1ab56SJosef Bacik } 4785cf1ab56SJosef Bacik 479f188591eSChris Mason mirror_num++; 480ea466794SJosef Bacik if (mirror_num == failed_mirror) 481ea466794SJosef Bacik mirror_num++; 482ea466794SJosef Bacik 4834235298eSChris Mason if (mirror_num > num_copies) 484ea466794SJosef Bacik break; 485f188591eSChris Mason } 486ea466794SJosef Bacik 487c0901581SStefan Behrens if (failed && !ret && failed_mirror) 48820a1fbf9SDavid Sterba btrfs_repair_eb_io_failure(eb, failed_mirror); 489ea466794SJosef Bacik 490ea466794SJosef Bacik return ret; 491f188591eSChris Mason } 49219c00ddcSChris Mason 493d352ac68SChris Mason /* 494d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 495d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 496d352ac68SChris Mason */ 497d397712bSChris Mason 49801d58472SDaniel Dressler static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) 49919c00ddcSChris Mason { 5004eee4fa4SMiao Xie u64 start = page_offset(page); 50119c00ddcSChris Mason u64 found_start; 5022996e1f8SJohannes Thumshirn u8 result[BTRFS_CSUM_SIZE]; 5032996e1f8SJohannes Thumshirn u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 50419c00ddcSChris Mason struct extent_buffer *eb; 5058d47a0d8SQu Wenruo int ret; 506f188591eSChris Mason 5074f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 5084f2de97aSJosef Bacik if (page != eb->pages[0]) 5094f2de97aSJosef Bacik return 0; 5100f805531SAlex Lyakas 51119c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 5120f805531SAlex Lyakas /* 5130f805531SAlex Lyakas * Please do not consolidate these warnings into a single if. 5140f805531SAlex Lyakas * It is useful to know what went wrong. 5150f805531SAlex Lyakas */ 5160f805531SAlex Lyakas if (WARN_ON(found_start != start)) 5170f805531SAlex Lyakas return -EUCLEAN; 5180f805531SAlex Lyakas if (WARN_ON(!PageUptodate(page))) 5190f805531SAlex Lyakas return -EUCLEAN; 5200f805531SAlex Lyakas 521de37aa51SNikolay Borisov ASSERT(memcmp_extent_buffer(eb, fs_info->fs_devices->metadata_uuid, 5229a8658e3SDavid Sterba offsetof(struct btrfs_header, fsid), 5239a8658e3SDavid Sterba BTRFS_FSID_SIZE) == 0); 5240f805531SAlex Lyakas 525c67b3892SDavid Sterba csum_tree_block(eb, result); 5262996e1f8SJohannes Thumshirn 5278d47a0d8SQu Wenruo if (btrfs_header_level(eb)) 5288d47a0d8SQu Wenruo ret = btrfs_check_node(eb); 5298d47a0d8SQu Wenruo else 5308d47a0d8SQu Wenruo ret = btrfs_check_leaf_full(eb); 5318d47a0d8SQu Wenruo 5328d47a0d8SQu Wenruo if (ret < 0) { 533c06631b0SQu Wenruo btrfs_print_tree(eb, 0); 5348d47a0d8SQu Wenruo btrfs_err(fs_info, 5358d47a0d8SQu Wenruo "block=%llu write time tree block corruption detected", 5368d47a0d8SQu Wenruo eb->start); 537c06631b0SQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 5388d47a0d8SQu Wenruo return ret; 5398d47a0d8SQu Wenruo } 5402996e1f8SJohannes Thumshirn write_extent_buffer(eb, result, 0, csum_size); 5418d47a0d8SQu Wenruo 5422996e1f8SJohannes Thumshirn return 0; 54319c00ddcSChris Mason } 54419c00ddcSChris Mason 545b0c9b3b0SDavid Sterba static int check_tree_block_fsid(struct extent_buffer *eb) 5462b82032cSYan Zheng { 547b0c9b3b0SDavid Sterba struct btrfs_fs_info *fs_info = eb->fs_info; 54801d58472SDaniel Dressler struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; 54944880fdcSAnand Jain u8 fsid[BTRFS_FSID_SIZE]; 5502b82032cSYan Zheng int ret = 1; 5512b82032cSYan Zheng 5529a8658e3SDavid Sterba read_extent_buffer(eb, fsid, offsetof(struct btrfs_header, fsid), 5539a8658e3SDavid Sterba BTRFS_FSID_SIZE); 5542b82032cSYan Zheng while (fs_devices) { 5557239ff4bSNikolay Borisov u8 *metadata_uuid; 5567239ff4bSNikolay Borisov 5577239ff4bSNikolay Borisov /* 5587239ff4bSNikolay Borisov * Checking the incompat flag is only valid for the current 5597239ff4bSNikolay Borisov * fs. For seed devices it's forbidden to have their uuid 5607239ff4bSNikolay Borisov * changed so reading ->fsid in this case is fine 5617239ff4bSNikolay Borisov */ 5627239ff4bSNikolay Borisov if (fs_devices == fs_info->fs_devices && 5637239ff4bSNikolay Borisov btrfs_fs_incompat(fs_info, METADATA_UUID)) 5647239ff4bSNikolay Borisov metadata_uuid = fs_devices->metadata_uuid; 5657239ff4bSNikolay Borisov else 5667239ff4bSNikolay Borisov metadata_uuid = fs_devices->fsid; 5677239ff4bSNikolay Borisov 5687239ff4bSNikolay Borisov if (!memcmp(fsid, metadata_uuid, BTRFS_FSID_SIZE)) { 5692b82032cSYan Zheng ret = 0; 5702b82032cSYan Zheng break; 5712b82032cSYan Zheng } 5722b82032cSYan Zheng fs_devices = fs_devices->seed; 5732b82032cSYan Zheng } 5742b82032cSYan Zheng return ret; 5752b82032cSYan Zheng } 5762b82032cSYan Zheng 577facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 578facc8a22SMiao Xie u64 phy_offset, struct page *page, 579facc8a22SMiao Xie u64 start, u64 end, int mirror) 580ce9adaa5SChris Mason { 581ce9adaa5SChris Mason u64 found_start; 582ce9adaa5SChris Mason int found_level; 583ce9adaa5SChris Mason struct extent_buffer *eb; 58415b6e8a8SDavid Sterba struct btrfs_fs_info *fs_info; 58515b6e8a8SDavid Sterba u16 csum_size; 586f188591eSChris Mason int ret = 0; 5872996e1f8SJohannes Thumshirn u8 result[BTRFS_CSUM_SIZE]; 588727011e0SChris Mason int reads_done; 589ce9adaa5SChris Mason 590ce9adaa5SChris Mason if (!page->private) 591ce9adaa5SChris Mason goto out; 592d397712bSChris Mason 5934f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 59415b6e8a8SDavid Sterba fs_info = eb->fs_info; 59515b6e8a8SDavid Sterba csum_size = btrfs_super_csum_size(fs_info->super_copy); 596d397712bSChris Mason 5970b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5980b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5990b32f4bbSJosef Bacik */ 60067439dadSDavid Sterba atomic_inc(&eb->refs); 6010b32f4bbSJosef Bacik 6020b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 603727011e0SChris Mason if (!reads_done) 604727011e0SChris Mason goto err; 605f188591eSChris Mason 6065cf1ab56SJosef Bacik eb->read_mirror = mirror; 607656f30dbSFilipe Manana if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { 608ea466794SJosef Bacik ret = -EIO; 609ea466794SJosef Bacik goto err; 610ea466794SJosef Bacik } 611ea466794SJosef Bacik 612ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 613727011e0SChris Mason if (found_start != eb->start) { 614893bf4b1SSu Yue btrfs_err_rl(fs_info, "bad tree block start, want %llu have %llu", 615893bf4b1SSu Yue eb->start, found_start); 616f188591eSChris Mason ret = -EIO; 617ce9adaa5SChris Mason goto err; 618ce9adaa5SChris Mason } 619b0c9b3b0SDavid Sterba if (check_tree_block_fsid(eb)) { 62002873e43SZhao Lei btrfs_err_rl(fs_info, "bad fsid on block %llu", 62194647322SDavid Sterba eb->start); 6221259ab75SChris Mason ret = -EIO; 6231259ab75SChris Mason goto err; 6241259ab75SChris Mason } 625ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6261c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 627893bf4b1SSu Yue btrfs_err(fs_info, "bad tree block level %d on %llu", 628893bf4b1SSu Yue (int)btrfs_header_level(eb), eb->start); 6291c24c3ceSJosef Bacik ret = -EIO; 6301c24c3ceSJosef Bacik goto err; 6311c24c3ceSJosef Bacik } 632ce9adaa5SChris Mason 63385d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 63485d4e461SChris Mason eb, found_level); 6354008c04aSChris Mason 636c67b3892SDavid Sterba csum_tree_block(eb, result); 637a826d6dcSJosef Bacik 6382996e1f8SJohannes Thumshirn if (memcmp_extent_buffer(eb, result, 0, csum_size)) { 6392996e1f8SJohannes Thumshirn u32 val; 6402996e1f8SJohannes Thumshirn u32 found = 0; 6412996e1f8SJohannes Thumshirn 6422996e1f8SJohannes Thumshirn memcpy(&found, result, csum_size); 6432996e1f8SJohannes Thumshirn 6442996e1f8SJohannes Thumshirn read_extent_buffer(eb, &val, 0, csum_size); 6452996e1f8SJohannes Thumshirn btrfs_warn_rl(fs_info, 6462996e1f8SJohannes Thumshirn "%s checksum verify failed on %llu wanted %x found %x level %d", 6472996e1f8SJohannes Thumshirn fs_info->sb->s_id, eb->start, 6482996e1f8SJohannes Thumshirn val, found, btrfs_header_level(eb)); 6492996e1f8SJohannes Thumshirn ret = -EUCLEAN; 6502996e1f8SJohannes Thumshirn goto err; 6512996e1f8SJohannes Thumshirn } 6522996e1f8SJohannes Thumshirn 653a826d6dcSJosef Bacik /* 654a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 655a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 656a826d6dcSJosef Bacik * return -EIO. 657a826d6dcSJosef Bacik */ 6581c4360eeSDavid Sterba if (found_level == 0 && btrfs_check_leaf_full(eb)) { 659a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 660a826d6dcSJosef Bacik ret = -EIO; 661a826d6dcSJosef Bacik } 662ce9adaa5SChris Mason 663813fd1dcSDavid Sterba if (found_level > 0 && btrfs_check_node(eb)) 664053ab70fSLiu Bo ret = -EIO; 665053ab70fSLiu Bo 6660b32f4bbSJosef Bacik if (!ret) 6670b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 66875391f0dSQu Wenruo else 66975391f0dSQu Wenruo btrfs_err(fs_info, 67075391f0dSQu Wenruo "block=%llu read time tree block corruption detected", 67175391f0dSQu Wenruo eb->start); 672ce9adaa5SChris Mason err: 67379fb65a1SJosef Bacik if (reads_done && 67479fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 675d48d71aaSDavid Sterba btree_readahead_hook(eb, ret); 6764bb31e92SArne Jansen 67753b381b3SDavid Woodhouse if (ret) { 67853b381b3SDavid Woodhouse /* 67953b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 68053b381b3SDavid Woodhouse * again, we have to make sure it has something 68153b381b3SDavid Woodhouse * to decrement 68253b381b3SDavid Woodhouse */ 68353b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6840b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 68553b381b3SDavid Woodhouse } 6860b32f4bbSJosef Bacik free_extent_buffer(eb); 687ce9adaa5SChris Mason out: 688f188591eSChris Mason return ret; 689ce9adaa5SChris Mason } 690ce9adaa5SChris Mason 6914246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 692ce9adaa5SChris Mason { 69397eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 694ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 6959e0af237SLiu Bo struct btrfs_workqueue *wq; 696ce9adaa5SChris Mason 697ce9adaa5SChris Mason fs_info = end_io_wq->info; 6984e4cbee9SChristoph Hellwig end_io_wq->status = bio->bi_status; 699d20f7043SChris Mason 70037226b21SMike Christie if (bio_op(bio) == REQ_OP_WRITE) { 701a0cac0ecSOmar Sandoval if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 7029e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 703a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 7049e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 705a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7069e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 707a0cac0ecSOmar Sandoval else 7089e0af237SLiu Bo wq = fs_info->endio_write_workers; 7099e0af237SLiu Bo } else { 7105c047a69SOmar Sandoval if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7119e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 712a0cac0ecSOmar Sandoval else if (end_io_wq->metadata) 7139e0af237SLiu Bo wq = fs_info->endio_meta_workers; 714a0cac0ecSOmar Sandoval else 7159e0af237SLiu Bo wq = fs_info->endio_workers; 7169e0af237SLiu Bo } 7179e0af237SLiu Bo 718a0cac0ecSOmar Sandoval btrfs_init_work(&end_io_wq->work, end_workqueue_fn, NULL, NULL); 7199e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 720ce9adaa5SChris Mason } 721ce9adaa5SChris Mason 7224e4cbee9SChristoph Hellwig blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 723bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 7240b86a832SChris Mason { 72597eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 7268b110e39SMiao Xie 72797eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 728ce9adaa5SChris Mason if (!end_io_wq) 7294e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 730ce9adaa5SChris Mason 731ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 732ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 73322c59948SChris Mason end_io_wq->info = info; 7344e4cbee9SChristoph Hellwig end_io_wq->status = 0; 735ce9adaa5SChris Mason end_io_wq->bio = bio; 73622c59948SChris Mason end_io_wq->metadata = metadata; 737ce9adaa5SChris Mason 738ce9adaa5SChris Mason bio->bi_private = end_io_wq; 739ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 74022c59948SChris Mason return 0; 74122c59948SChris Mason } 74222c59948SChris Mason 7434a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7444a69a410SChris Mason { 7454a69a410SChris Mason struct async_submit_bio *async; 7464e4cbee9SChristoph Hellwig blk_status_t ret; 7474a69a410SChris Mason 7484a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 749c6100a4bSJosef Bacik ret = async->submit_bio_start(async->private_data, async->bio, 750eaf25d93SChris Mason async->bio_offset); 75179787eaaSJeff Mahoney if (ret) 7524e4cbee9SChristoph Hellwig async->status = ret; 7534a69a410SChris Mason } 7544a69a410SChris Mason 75506ea01b1SDavid Sterba /* 75606ea01b1SDavid Sterba * In order to insert checksums into the metadata in large chunks, we wait 75706ea01b1SDavid Sterba * until bio submission time. All the pages in the bio are checksummed and 75806ea01b1SDavid Sterba * sums are attached onto the ordered extent record. 75906ea01b1SDavid Sterba * 76006ea01b1SDavid Sterba * At IO completion time the csums attached on the ordered extent record are 76106ea01b1SDavid Sterba * inserted into the tree. 76206ea01b1SDavid Sterba */ 7634a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7648b712842SChris Mason { 7658b712842SChris Mason struct async_submit_bio *async; 76606ea01b1SDavid Sterba struct inode *inode; 76706ea01b1SDavid Sterba blk_status_t ret; 7688b712842SChris Mason 7698b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 77006ea01b1SDavid Sterba inode = async->private_data; 7714854ddd0SChris Mason 772bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 7734e4cbee9SChristoph Hellwig if (async->status) { 7744e4cbee9SChristoph Hellwig async->bio->bi_status = async->status; 7754246a0b6SChristoph Hellwig bio_endio(async->bio); 77679787eaaSJeff Mahoney return; 77779787eaaSJeff Mahoney } 77879787eaaSJeff Mahoney 779ec39f769SChris Mason /* 780ec39f769SChris Mason * All of the bios that pass through here are from async helpers. 781ec39f769SChris Mason * Use REQ_CGROUP_PUNT to issue them from the owning cgroup's context. 782ec39f769SChris Mason * This changes nothing when cgroups aren't in use. 783ec39f769SChris Mason */ 784ec39f769SChris Mason async->bio->bi_opf |= REQ_CGROUP_PUNT; 78508635baeSChris Mason ret = btrfs_map_bio(btrfs_sb(inode->i_sb), async->bio, async->mirror_num); 78606ea01b1SDavid Sterba if (ret) { 78706ea01b1SDavid Sterba async->bio->bi_status = ret; 78806ea01b1SDavid Sterba bio_endio(async->bio); 78906ea01b1SDavid Sterba } 7904a69a410SChris Mason } 7914a69a410SChris Mason 7924a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7934a69a410SChris Mason { 7944a69a410SChris Mason struct async_submit_bio *async; 7954a69a410SChris Mason 7964a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7978b712842SChris Mason kfree(async); 7988b712842SChris Mason } 7998b712842SChris Mason 8008c27cb35SLinus Torvalds blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 801c6100a4bSJosef Bacik int mirror_num, unsigned long bio_flags, 802c6100a4bSJosef Bacik u64 bio_offset, void *private_data, 803e288c080SDavid Sterba extent_submit_bio_start_t *submit_bio_start) 80444b8bd7eSChris Mason { 80544b8bd7eSChris Mason struct async_submit_bio *async; 80644b8bd7eSChris Mason 80744b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 80844b8bd7eSChris Mason if (!async) 8094e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 81044b8bd7eSChris Mason 811c6100a4bSJosef Bacik async->private_data = private_data; 81244b8bd7eSChris Mason async->bio = bio; 81344b8bd7eSChris Mason async->mirror_num = mirror_num; 8144a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8154a69a410SChris Mason 816a0cac0ecSOmar Sandoval btrfs_init_work(&async->work, run_one_async_start, run_one_async_done, 817a0cac0ecSOmar Sandoval run_one_async_free); 8184a69a410SChris Mason 819eaf25d93SChris Mason async->bio_offset = bio_offset; 8208c8bee1dSChris Mason 8214e4cbee9SChristoph Hellwig async->status = 0; 82279787eaaSJeff Mahoney 82367f055c7SChristoph Hellwig if (op_is_sync(bio->bi_opf)) 8245cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 825d313d7a3SChris Mason 8265cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 82744b8bd7eSChris Mason return 0; 82844b8bd7eSChris Mason } 82944b8bd7eSChris Mason 8304e4cbee9SChristoph Hellwig static blk_status_t btree_csum_one_bio(struct bio *bio) 831ce3ed71aSChris Mason { 8322c30c71bSKent Overstreet struct bio_vec *bvec; 833ce3ed71aSChris Mason struct btrfs_root *root; 8342b070cfeSChristoph Hellwig int ret = 0; 8356dc4f100SMing Lei struct bvec_iter_all iter_all; 836ce3ed71aSChris Mason 837c09abff8SDavid Sterba ASSERT(!bio_flagged(bio, BIO_CLONED)); 8382b070cfeSChristoph Hellwig bio_for_each_segment_all(bvec, bio, iter_all) { 839ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 84001d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 84179787eaaSJeff Mahoney if (ret) 84279787eaaSJeff Mahoney break; 843ce3ed71aSChris Mason } 8442c30c71bSKent Overstreet 8454e4cbee9SChristoph Hellwig return errno_to_blk_status(ret); 846ce3ed71aSChris Mason } 847ce3ed71aSChris Mason 848d0ee3934SDavid Sterba static blk_status_t btree_submit_bio_start(void *private_data, struct bio *bio, 849eaf25d93SChris Mason u64 bio_offset) 85022c59948SChris Mason { 8518b712842SChris Mason /* 8528b712842SChris Mason * when we're called for a write, we're already in the async 8535443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8548b712842SChris Mason */ 85579787eaaSJeff Mahoney return btree_csum_one_bio(bio); 85622c59948SChris Mason } 85722c59948SChris Mason 8589b4e675aSDavid Sterba static int check_async_write(struct btrfs_fs_info *fs_info, 8599b4e675aSDavid Sterba struct btrfs_inode *bi) 860de0022b9SJosef Bacik { 8616300463bSLiu Bo if (atomic_read(&bi->sync_writers)) 8626300463bSLiu Bo return 0; 8639b4e675aSDavid Sterba if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags)) 864de0022b9SJosef Bacik return 0; 865de0022b9SJosef Bacik return 1; 866de0022b9SJosef Bacik } 867de0022b9SJosef Bacik 868a56b1c7bSNikolay Borisov static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio, 86950489a57SNikolay Borisov int mirror_num, 87050489a57SNikolay Borisov unsigned long bio_flags) 87144b8bd7eSChris Mason { 8720b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); 8739b4e675aSDavid Sterba int async = check_async_write(fs_info, BTRFS_I(inode)); 8744e4cbee9SChristoph Hellwig blk_status_t ret; 875cad321adSChris Mason 87637226b21SMike Christie if (bio_op(bio) != REQ_OP_WRITE) { 877cad321adSChris Mason /* 878cad321adSChris Mason * called for a read, do the setup so that checksum validation 879cad321adSChris Mason * can happen in the async kernel threads 880cad321adSChris Mason */ 8810b246afaSJeff Mahoney ret = btrfs_bio_wq_end_io(fs_info, bio, 8820b246afaSJeff Mahoney BTRFS_WQ_ENDIO_METADATA); 8831d4284bdSChris Mason if (ret) 88461891923SStefan Behrens goto out_w_error; 88508635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 886de0022b9SJosef Bacik } else if (!async) { 887de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 888de0022b9SJosef Bacik if (ret) 88961891923SStefan Behrens goto out_w_error; 89008635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 89161891923SStefan Behrens } else { 892cad321adSChris Mason /* 89361891923SStefan Behrens * kthread helpers are used to submit writes so that 89461891923SStefan Behrens * checksumming can happen in parallel across all CPUs 895cad321adSChris Mason */ 896c6100a4bSJosef Bacik ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0, 897e68f2ee7SNikolay Borisov 0, inode, btree_submit_bio_start); 89844b8bd7eSChris Mason } 89944b8bd7eSChris Mason 9004246a0b6SChristoph Hellwig if (ret) 9014246a0b6SChristoph Hellwig goto out_w_error; 9024246a0b6SChristoph Hellwig return 0; 9034246a0b6SChristoph Hellwig 90461891923SStefan Behrens out_w_error: 9054e4cbee9SChristoph Hellwig bio->bi_status = ret; 9064246a0b6SChristoph Hellwig bio_endio(bio); 90761891923SStefan Behrens return ret; 90861891923SStefan Behrens } 90961891923SStefan Behrens 9103dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 911784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 912a6bc32b8SMel Gorman struct page *newpage, struct page *page, 913a6bc32b8SMel Gorman enum migrate_mode mode) 914784b4e29SChris Mason { 915784b4e29SChris Mason /* 916784b4e29SChris Mason * we can't safely write a btree page from here, 917784b4e29SChris Mason * we haven't done the locking hook 918784b4e29SChris Mason */ 919784b4e29SChris Mason if (PageDirty(page)) 920784b4e29SChris Mason return -EAGAIN; 921784b4e29SChris Mason /* 922784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 923784b4e29SChris Mason * We must have no buffers or drop them. 924784b4e29SChris Mason */ 925784b4e29SChris Mason if (page_has_private(page) && 926784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 927784b4e29SChris Mason return -EAGAIN; 928a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 929784b4e29SChris Mason } 9303dd1462eSJan Beulich #endif 931784b4e29SChris Mason 9320da5468fSChris Mason 9330da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9340da5468fSChris Mason struct writeback_control *wbc) 9350da5468fSChris Mason { 936e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 937e2d84521SMiao Xie int ret; 938e2d84521SMiao Xie 939d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 940448d640bSChris Mason 941448d640bSChris Mason if (wbc->for_kupdate) 942448d640bSChris Mason return 0; 943448d640bSChris Mason 944e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 945b9473439SChris Mason /* this is a bit racy, but that's ok */ 946d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 947d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 948d814a491SEthan Lien fs_info->dirty_metadata_batch); 949e2d84521SMiao Xie if (ret < 0) 950793955bcSChris Mason return 0; 951793955bcSChris Mason } 9520b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9530da5468fSChris Mason } 9540da5468fSChris Mason 955b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9565f39d397SChris Mason { 95771ad38b4SDavid Sterba return extent_read_full_page(page, btree_get_extent, 0); 9585f39d397SChris Mason } 9595f39d397SChris Mason 96070dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9615f39d397SChris Mason { 96298509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 96398509cfcSChris Mason return 0; 9640c4e538bSDavid Sterba 965f7a52a40SDavid Sterba return try_release_extent_buffer(page); 966d98237b3SChris Mason } 967d98237b3SChris Mason 968d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 969d47992f8SLukas Czerner unsigned int length) 970d98237b3SChris Mason { 971d1310b2eSChris Mason struct extent_io_tree *tree; 972d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9735f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9745f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9759ad6b7bcSChris Mason if (PagePrivate(page)) { 976efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 977efe120a0SFrank Holton "page private not zero on page %llu", 978efe120a0SFrank Holton (unsigned long long)page_offset(page)); 979d1b89bc0SGuoqing Jiang detach_page_private(page); 9809ad6b7bcSChris Mason } 981d98237b3SChris Mason } 982d98237b3SChris Mason 9830b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 9840b32f4bbSJosef Bacik { 985bb146eb2SJosef Bacik #ifdef DEBUG 9860b32f4bbSJosef Bacik struct extent_buffer *eb; 9870b32f4bbSJosef Bacik 9880b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 9890b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 9900b32f4bbSJosef Bacik BUG_ON(!eb); 9910b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 9920b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 9930b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 994bb146eb2SJosef Bacik #endif 9950b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 9960b32f4bbSJosef Bacik } 9970b32f4bbSJosef Bacik 9987f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 999d98237b3SChris Mason .readpage = btree_readpage, 10000da5468fSChris Mason .writepages = btree_writepages, 10015f39d397SChris Mason .releasepage = btree_releasepage, 10025f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10035a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1004784b4e29SChris Mason .migratepage = btree_migratepage, 10055a92bc88SChris Mason #endif 10060b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1007d98237b3SChris Mason }; 1008123abc88SChris Mason 10092ff7e61eSJeff Mahoney void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr) 1010090d1875SChris Mason { 10115f39d397SChris Mason struct extent_buffer *buf = NULL; 1012537f38f0SNikolay Borisov int ret; 1013090d1875SChris Mason 10142ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1015c871b0f2SLiu Bo if (IS_ERR(buf)) 10166197d86eSDavid Sterba return; 1017537f38f0SNikolay Borisov 1018c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(buf, WAIT_NONE, 0); 1019537f38f0SNikolay Borisov if (ret < 0) 1020537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 1021537f38f0SNikolay Borisov else 10225f39d397SChris Mason free_extent_buffer(buf); 1023090d1875SChris Mason } 1024090d1875SChris Mason 10252ff7e61eSJeff Mahoney struct extent_buffer *btrfs_find_create_tree_block( 10262ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info, 10270308af44SDavid Sterba u64 bytenr) 10280999df54SChris Mason { 10290b246afaSJeff Mahoney if (btrfs_is_testing(fs_info)) 10300b246afaSJeff Mahoney return alloc_test_extent_buffer(fs_info, bytenr); 10310b246afaSJeff Mahoney return alloc_extent_buffer(fs_info, bytenr); 10320999df54SChris Mason } 10330999df54SChris Mason 1034581c1760SQu Wenruo /* 1035581c1760SQu Wenruo * Read tree block at logical address @bytenr and do variant basic but critical 1036581c1760SQu Wenruo * verification. 1037581c1760SQu Wenruo * 1038581c1760SQu Wenruo * @parent_transid: expected transid of this tree block, skip check if 0 1039581c1760SQu Wenruo * @level: expected level, mandatory check 1040581c1760SQu Wenruo * @first_key: expected key in slot 0, skip check if NULL 1041581c1760SQu Wenruo */ 10422ff7e61eSJeff Mahoney struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, 1043581c1760SQu Wenruo u64 parent_transid, int level, 1044581c1760SQu Wenruo struct btrfs_key *first_key) 1045e20d96d6SChris Mason { 10465f39d397SChris Mason struct extent_buffer *buf = NULL; 104719c00ddcSChris Mason int ret; 104819c00ddcSChris Mason 10492ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1050c871b0f2SLiu Bo if (IS_ERR(buf)) 1051c871b0f2SLiu Bo return buf; 1052e4204dedSChris Mason 10535ab12d1fSDavid Sterba ret = btree_read_extent_buffer_pages(buf, parent_transid, 1054581c1760SQu Wenruo level, first_key); 10550f0fe8f7SFilipe David Borba Manana if (ret) { 1056537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 105764c043deSLiu Bo return ERR_PTR(ret); 10580f0fe8f7SFilipe David Borba Manana } 10595f39d397SChris Mason return buf; 1060ce9adaa5SChris Mason 1061eb60ceacSChris Mason } 1062eb60ceacSChris Mason 10636a884d7dSDavid Sterba void btrfs_clean_tree_block(struct extent_buffer *buf) 1064ed2ff2cbSChris Mason { 10656a884d7dSDavid Sterba struct btrfs_fs_info *fs_info = buf->fs_info; 106655c69072SChris Mason if (btrfs_header_generation(buf) == 1067e2d84521SMiao Xie fs_info->running_transaction->transid) { 1068b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1069b4ce94deSChris Mason 1070b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1071104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 1072e2d84521SMiao Xie -buf->len, 1073e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1074b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 10758bead258SDavid Sterba btrfs_set_lock_blocking_write(buf); 10760b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1077925baeddSChris Mason } 10785f39d397SChris Mason } 1079ed7b63ebSJosef Bacik } 10805f39d397SChris Mason 1081da17066cSJeff Mahoney static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1082e20d96d6SChris Mason u64 objectid) 1083d97e63b6SChris Mason { 10847c0260eeSJeff Mahoney bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 108596dfcb46SJosef Bacik root->fs_info = fs_info; 1086cfaa7295SChris Mason root->node = NULL; 1087a28ec197SChris Mason root->commit_root = NULL; 108827cdeb70SMiao Xie root->state = 0; 1089d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 10900b86a832SChris Mason 10910f7d52f4SChris Mason root->last_trans = 0; 109213a8a7c8SYan, Zheng root->highest_objectid = 0; 1093eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1094199c2a9cSMiao Xie root->nr_ordered_extents = 0; 10956bef4d31SEric Paris root->inode_tree = RB_ROOT; 109616cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1097f0486c68SYan, Zheng root->block_rsv = NULL; 10980b86a832SChris Mason 10990b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11005d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1101eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1102eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1103199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1104199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 1105d2311e69SQu Wenruo INIT_LIST_HEAD(&root->reloc_dirty_list); 11062ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11072ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 11085d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1109eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1110199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1111f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 11122ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 11132ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 11148287475aSQu Wenruo spin_lock_init(&root->qgroup_meta_rsv_lock); 1115a2135011SChris Mason mutex_init(&root->objectid_mutex); 1116e02119d5SChris Mason mutex_init(&root->log_mutex); 111731f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1118573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 1119c53e9653SQu Wenruo init_waitqueue_head(&root->qgroup_flush_wait); 11207237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11217237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11227237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11238b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 11248b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 11257237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11267237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11277237f183SYan Zheng atomic_set(&root->log_writers, 0); 11282ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 11290700cea7SElena Reshetova refcount_set(&root->refs, 1); 11308ecebf4dSRobbie Ko atomic_set(&root->snapshot_force_cow, 0); 1131eede2bf3SOmar Sandoval atomic_set(&root->nr_swapfiles, 0); 11327237f183SYan Zheng root->log_transid = 0; 1133d1433debSMiao Xie root->log_transid_committed = -1; 1134257c62e1SChris Mason root->last_log_commit = 0; 1135e289f03eSFilipe Manana if (!dummy) { 113643eb5f29SQu Wenruo extent_io_tree_init(fs_info, &root->dirty_log_pages, 113743eb5f29SQu Wenruo IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL); 1138e289f03eSFilipe Manana extent_io_tree_init(fs_info, &root->log_csum_range, 1139e289f03eSFilipe Manana IO_TREE_LOG_CSUM_RANGE, NULL); 1140e289f03eSFilipe Manana } 1141017e5369SChris Mason 11423768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11433768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11446702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 11454d775673SChris Mason root->root_key.objectid = objectid; 11460ee5dc67SAl Viro root->anon_dev = 0; 11478ea05e3aSAlexander Block 11485f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 1149370a11b8SQu Wenruo btrfs_qgroup_init_swapped_blocks(&root->swapped_blocks); 1150bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 1151bd647ce3SJosef Bacik INIT_LIST_HEAD(&root->leak_list); 1152bd647ce3SJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 1153bd647ce3SJosef Bacik list_add_tail(&root->leak_list, &fs_info->allocated_roots); 1154bd647ce3SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 1155bd647ce3SJosef Bacik #endif 11563768f368SChris Mason } 11573768f368SChris Mason 115874e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 115996dfcb46SJosef Bacik u64 objectid, gfp_t flags) 11606f07e42eSAl Viro { 116174e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 11626f07e42eSAl Viro if (root) 116396dfcb46SJosef Bacik __setup_root(root, fs_info, objectid); 11646f07e42eSAl Viro return root; 11656f07e42eSAl Viro } 11666f07e42eSAl Viro 116706ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 116806ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 1169da17066cSJeff Mahoney struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info) 117006ea65a3SJosef Bacik { 117106ea65a3SJosef Bacik struct btrfs_root *root; 117206ea65a3SJosef Bacik 11737c0260eeSJeff Mahoney if (!fs_info) 11747c0260eeSJeff Mahoney return ERR_PTR(-EINVAL); 11757c0260eeSJeff Mahoney 117696dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, GFP_KERNEL); 117706ea65a3SJosef Bacik if (!root) 117806ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1179da17066cSJeff Mahoney 1180b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 1181faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 118206ea65a3SJosef Bacik 118306ea65a3SJosef Bacik return root; 118406ea65a3SJosef Bacik } 118506ea65a3SJosef Bacik #endif 118606ea65a3SJosef Bacik 118720897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 118820897f5cSArne Jansen u64 objectid) 118920897f5cSArne Jansen { 11909b7a2440SDavid Sterba struct btrfs_fs_info *fs_info = trans->fs_info; 119120897f5cSArne Jansen struct extent_buffer *leaf; 119220897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 119320897f5cSArne Jansen struct btrfs_root *root; 119420897f5cSArne Jansen struct btrfs_key key; 1195b89f6d1fSFilipe Manana unsigned int nofs_flag; 119620897f5cSArne Jansen int ret = 0; 119720897f5cSArne Jansen 1198b89f6d1fSFilipe Manana /* 1199b89f6d1fSFilipe Manana * We're holding a transaction handle, so use a NOFS memory allocation 1200b89f6d1fSFilipe Manana * context to avoid deadlock if reclaim happens. 1201b89f6d1fSFilipe Manana */ 1202b89f6d1fSFilipe Manana nofs_flag = memalloc_nofs_save(); 120396dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, objectid, GFP_KERNEL); 1204b89f6d1fSFilipe Manana memalloc_nofs_restore(nofs_flag); 120520897f5cSArne Jansen if (!root) 120620897f5cSArne Jansen return ERR_PTR(-ENOMEM); 120720897f5cSArne Jansen 120820897f5cSArne Jansen root->root_key.objectid = objectid; 120920897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 121020897f5cSArne Jansen root->root_key.offset = 0; 121120897f5cSArne Jansen 12124d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 121320897f5cSArne Jansen if (IS_ERR(leaf)) { 121420897f5cSArne Jansen ret = PTR_ERR(leaf); 12151dd05682STsutomu Itoh leaf = NULL; 121620897f5cSArne Jansen goto fail; 121720897f5cSArne Jansen } 121820897f5cSArne Jansen 121920897f5cSArne Jansen root->node = leaf; 122020897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 122120897f5cSArne Jansen 122220897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 122327cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 122420897f5cSArne Jansen 122520897f5cSArne Jansen root->root_item.flags = 0; 122620897f5cSArne Jansen root->root_item.byte_limit = 0; 122720897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 122820897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 122920897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 123020897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 123120897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 123220897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 123320897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 123433d85fdaSQu Wenruo if (is_fstree(objectid)) 1235807fc790SAndy Shevchenko generate_random_guid(root->root_item.uuid); 1236807fc790SAndy Shevchenko else 1237807fc790SAndy Shevchenko export_guid(root->root_item.uuid, &guid_null); 123820897f5cSArne Jansen root->root_item.drop_level = 0; 123920897f5cSArne Jansen 124020897f5cSArne Jansen key.objectid = objectid; 124120897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 124220897f5cSArne Jansen key.offset = 0; 124320897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 124420897f5cSArne Jansen if (ret) 124520897f5cSArne Jansen goto fail; 124620897f5cSArne Jansen 124720897f5cSArne Jansen btrfs_tree_unlock(leaf); 124820897f5cSArne Jansen 124920897f5cSArne Jansen return root; 12501dd05682STsutomu Itoh 12511dd05682STsutomu Itoh fail: 12528c38938cSJosef Bacik if (leaf) 12531dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 125400246528SJosef Bacik btrfs_put_root(root); 12551dd05682STsutomu Itoh 12561dd05682STsutomu Itoh return ERR_PTR(ret); 125720897f5cSArne Jansen } 125820897f5cSArne Jansen 12597237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1260e02119d5SChris Mason struct btrfs_fs_info *fs_info) 12610f7d52f4SChris Mason { 12620f7d52f4SChris Mason struct btrfs_root *root; 12637237f183SYan Zheng struct extent_buffer *leaf; 1264e02119d5SChris Mason 126596dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, GFP_NOFS); 1266e02119d5SChris Mason if (!root) 12677237f183SYan Zheng return ERR_PTR(-ENOMEM); 1268e02119d5SChris Mason 1269e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1270e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1271e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 127227cdeb70SMiao Xie 12737237f183SYan Zheng /* 127492a7cc42SQu Wenruo * DON'T set SHAREABLE bit for log trees. 127527cdeb70SMiao Xie * 127692a7cc42SQu Wenruo * Log trees are not exposed to user space thus can't be snapshotted, 127792a7cc42SQu Wenruo * and they go away before a real commit is actually done. 127892a7cc42SQu Wenruo * 127992a7cc42SQu Wenruo * They do store pointers to file data extents, and those reference 128092a7cc42SQu Wenruo * counts still get updated (along with back refs to the log tree). 12817237f183SYan Zheng */ 1282e02119d5SChris Mason 12834d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 12844d75f8a9SDavid Sterba NULL, 0, 0, 0); 12857237f183SYan Zheng if (IS_ERR(leaf)) { 128600246528SJosef Bacik btrfs_put_root(root); 12877237f183SYan Zheng return ERR_CAST(leaf); 12887237f183SYan Zheng } 1289e02119d5SChris Mason 12907237f183SYan Zheng root->node = leaf; 1291e02119d5SChris Mason 1292e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1293e02119d5SChris Mason btrfs_tree_unlock(root->node); 12947237f183SYan Zheng return root; 12957237f183SYan Zheng } 12967237f183SYan Zheng 12977237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 12987237f183SYan Zheng struct btrfs_fs_info *fs_info) 12997237f183SYan Zheng { 13007237f183SYan Zheng struct btrfs_root *log_root; 13017237f183SYan Zheng 13027237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13037237f183SYan Zheng if (IS_ERR(log_root)) 13047237f183SYan Zheng return PTR_ERR(log_root); 13057237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 13067237f183SYan Zheng fs_info->log_root_tree = log_root; 13077237f183SYan Zheng return 0; 13087237f183SYan Zheng } 13097237f183SYan Zheng 13107237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13117237f183SYan Zheng struct btrfs_root *root) 13127237f183SYan Zheng { 13130b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 13147237f183SYan Zheng struct btrfs_root *log_root; 13157237f183SYan Zheng struct btrfs_inode_item *inode_item; 13167237f183SYan Zheng 13170b246afaSJeff Mahoney log_root = alloc_log_tree(trans, fs_info); 13187237f183SYan Zheng if (IS_ERR(log_root)) 13197237f183SYan Zheng return PTR_ERR(log_root); 13207237f183SYan Zheng 13217237f183SYan Zheng log_root->last_trans = trans->transid; 13227237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 13237237f183SYan Zheng 13247237f183SYan Zheng inode_item = &log_root->root_item.inode; 13253cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 13263cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 13273cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1328da17066cSJeff Mahoney btrfs_set_stack_inode_nbytes(inode_item, 13290b246afaSJeff Mahoney fs_info->nodesize); 13303cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 13317237f183SYan Zheng 13325d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13337237f183SYan Zheng 13347237f183SYan Zheng WARN_ON(root->log_root); 13357237f183SYan Zheng root->log_root = log_root; 13367237f183SYan Zheng root->log_transid = 0; 1337d1433debSMiao Xie root->log_transid_committed = -1; 1338257c62e1SChris Mason root->last_log_commit = 0; 1339e02119d5SChris Mason return 0; 1340e02119d5SChris Mason } 1341e02119d5SChris Mason 134262a2c73eSJosef Bacik struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1343cb517eabSMiao Xie struct btrfs_key *key) 1344e02119d5SChris Mason { 1345e02119d5SChris Mason struct btrfs_root *root; 1346e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13470f7d52f4SChris Mason struct btrfs_path *path; 134884234f3aSYan Zheng u64 generation; 1349cb517eabSMiao Xie int ret; 1350581c1760SQu Wenruo int level; 1351cb517eabSMiao Xie 1352cb517eabSMiao Xie path = btrfs_alloc_path(); 1353cb517eabSMiao Xie if (!path) 1354cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 13550f7d52f4SChris Mason 135696dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, key->objectid, GFP_NOFS); 1357cb517eabSMiao Xie if (!root) { 1358cb517eabSMiao Xie ret = -ENOMEM; 1359cb517eabSMiao Xie goto alloc_fail; 13600f7d52f4SChris Mason } 13610f7d52f4SChris Mason 1362cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1363cb517eabSMiao Xie &root->root_item, &root->root_key); 13640f7d52f4SChris Mason if (ret) { 136513a8a7c8SYan, Zheng if (ret > 0) 136613a8a7c8SYan, Zheng ret = -ENOENT; 1367cb517eabSMiao Xie goto find_fail; 13680f7d52f4SChris Mason } 136913a8a7c8SYan, Zheng 137084234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1371581c1760SQu Wenruo level = btrfs_root_level(&root->root_item); 13722ff7e61eSJeff Mahoney root->node = read_tree_block(fs_info, 13732ff7e61eSJeff Mahoney btrfs_root_bytenr(&root->root_item), 1374581c1760SQu Wenruo generation, level, NULL); 137564c043deSLiu Bo if (IS_ERR(root->node)) { 137664c043deSLiu Bo ret = PTR_ERR(root->node); 13778c38938cSJosef Bacik root->node = NULL; 1378cb517eabSMiao Xie goto find_fail; 1379cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1380cb517eabSMiao Xie ret = -EIO; 138164c043deSLiu Bo goto find_fail; 1382416bc658SJosef Bacik } 13835d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 138413a8a7c8SYan, Zheng out: 1385cb517eabSMiao Xie btrfs_free_path(path); 1386cb517eabSMiao Xie return root; 1387cb517eabSMiao Xie 1388cb517eabSMiao Xie find_fail: 138900246528SJosef Bacik btrfs_put_root(root); 1390cb517eabSMiao Xie alloc_fail: 1391cb517eabSMiao Xie root = ERR_PTR(ret); 1392cb517eabSMiao Xie goto out; 1393cb517eabSMiao Xie } 1394cb517eabSMiao Xie 13952dfb1e43SQu Wenruo /* 13962dfb1e43SQu Wenruo * Initialize subvolume root in-memory structure 13972dfb1e43SQu Wenruo * 13982dfb1e43SQu Wenruo * @anon_dev: anonymous device to attach to the root, if zero, allocate new 13992dfb1e43SQu Wenruo */ 14002dfb1e43SQu Wenruo static int btrfs_init_fs_root(struct btrfs_root *root, dev_t anon_dev) 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 1423aeb935a4SQu Wenruo if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID && 1424aeb935a4SQu Wenruo root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID) { 142592a7cc42SQu Wenruo set_bit(BTRFS_ROOT_SHAREABLE, &root->state); 1426f39e4571SJosef Bacik btrfs_check_and_init_root_item(&root->root_item); 1427f39e4571SJosef Bacik } 1428f39e4571SJosef Bacik 1429cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 143057cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 143157cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1432cb517eabSMiao Xie 1433851fd730SQu Wenruo /* 1434851fd730SQu Wenruo * Don't assign anonymous block device to roots that are not exposed to 1435851fd730SQu Wenruo * userspace, the id pool is limited to 1M 1436851fd730SQu Wenruo */ 1437851fd730SQu Wenruo if (is_fstree(root->root_key.objectid) && 1438851fd730SQu Wenruo btrfs_root_refs(&root->root_item) > 0) { 14392dfb1e43SQu Wenruo if (!anon_dev) { 1440cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1441cb517eabSMiao Xie if (ret) 1442876d2cf1SLiu Bo goto fail; 14432dfb1e43SQu Wenruo } else { 14442dfb1e43SQu Wenruo root->anon_dev = anon_dev; 14452dfb1e43SQu Wenruo } 1446851fd730SQu Wenruo } 1447f32e48e9SChandan Rajendra 1448f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1449f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1450f32e48e9SChandan Rajendra &root->highest_objectid); 1451f32e48e9SChandan Rajendra if (ret) { 1452f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1453876d2cf1SLiu Bo goto fail; 1454f32e48e9SChandan Rajendra } 1455f32e48e9SChandan Rajendra 1456f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1457f32e48e9SChandan Rajendra 1458f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1459f32e48e9SChandan Rajendra 1460cb517eabSMiao Xie return 0; 1461cb517eabSMiao Xie fail: 146284db5ccfSDavid Sterba /* The caller is responsible to call btrfs_free_fs_root */ 1463cb517eabSMiao Xie return ret; 1464cb517eabSMiao Xie } 1465cb517eabSMiao Xie 1466a98db0f3SJosef Bacik static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1467cb517eabSMiao Xie u64 root_id) 1468cb517eabSMiao Xie { 1469cb517eabSMiao Xie struct btrfs_root *root; 1470cb517eabSMiao Xie 1471cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1472cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1473cb517eabSMiao Xie (unsigned long)root_id); 1474bc44d7c4SJosef Bacik if (root) 147500246528SJosef Bacik root = btrfs_grab_root(root); 1476cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1477cb517eabSMiao Xie return root; 1478cb517eabSMiao Xie } 1479cb517eabSMiao Xie 1480cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1481cb517eabSMiao Xie struct btrfs_root *root) 1482cb517eabSMiao Xie { 1483cb517eabSMiao Xie int ret; 1484cb517eabSMiao Xie 1485e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1486cb517eabSMiao Xie if (ret) 1487cb517eabSMiao Xie return ret; 1488cb517eabSMiao Xie 1489cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1490cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1491cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1492cb517eabSMiao Xie root); 1493af01d2e5SJosef Bacik if (ret == 0) { 149400246528SJosef Bacik btrfs_grab_root(root); 149527cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1496af01d2e5SJosef Bacik } 1497cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1498cb517eabSMiao Xie radix_tree_preload_end(); 1499cb517eabSMiao Xie 1500cb517eabSMiao Xie return ret; 1501cb517eabSMiao Xie } 1502cb517eabSMiao Xie 1503bd647ce3SJosef Bacik void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info) 1504bd647ce3SJosef Bacik { 1505bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 1506bd647ce3SJosef Bacik struct btrfs_root *root; 1507bd647ce3SJosef Bacik 1508bd647ce3SJosef Bacik while (!list_empty(&fs_info->allocated_roots)) { 1509bd647ce3SJosef Bacik root = list_first_entry(&fs_info->allocated_roots, 1510bd647ce3SJosef Bacik struct btrfs_root, leak_list); 1511bd647ce3SJosef Bacik btrfs_err(fs_info, "leaked root %llu-%llu refcount %d", 1512bd647ce3SJosef Bacik root->root_key.objectid, root->root_key.offset, 1513bd647ce3SJosef Bacik refcount_read(&root->refs)); 1514bd647ce3SJosef Bacik while (refcount_read(&root->refs) > 1) 151500246528SJosef Bacik btrfs_put_root(root); 151600246528SJosef Bacik btrfs_put_root(root); 1517bd647ce3SJosef Bacik } 1518bd647ce3SJosef Bacik #endif 1519bd647ce3SJosef Bacik } 1520bd647ce3SJosef Bacik 15210d4b0463SJosef Bacik void btrfs_free_fs_info(struct btrfs_fs_info *fs_info) 15220d4b0463SJosef Bacik { 1523141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 1524141386e1SJosef Bacik percpu_counter_destroy(&fs_info->delalloc_bytes); 1525141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dio_bytes); 1526141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dev_replace.bio_counter); 1527141386e1SJosef Bacik btrfs_free_csum_hash(fs_info); 1528141386e1SJosef Bacik btrfs_free_stripe_hash_table(fs_info); 1529141386e1SJosef Bacik btrfs_free_ref_cache(fs_info); 15300d4b0463SJosef Bacik kfree(fs_info->balance_ctl); 15310d4b0463SJosef Bacik kfree(fs_info->delayed_root); 153200246528SJosef Bacik btrfs_put_root(fs_info->extent_root); 153300246528SJosef Bacik btrfs_put_root(fs_info->tree_root); 153400246528SJosef Bacik btrfs_put_root(fs_info->chunk_root); 153500246528SJosef Bacik btrfs_put_root(fs_info->dev_root); 153600246528SJosef Bacik btrfs_put_root(fs_info->csum_root); 153700246528SJosef Bacik btrfs_put_root(fs_info->quota_root); 153800246528SJosef Bacik btrfs_put_root(fs_info->uuid_root); 153900246528SJosef Bacik btrfs_put_root(fs_info->free_space_root); 154000246528SJosef Bacik btrfs_put_root(fs_info->fs_root); 1541aeb935a4SQu Wenruo btrfs_put_root(fs_info->data_reloc_root); 1542bd647ce3SJosef Bacik btrfs_check_leaked_roots(fs_info); 15433fd63727SJosef Bacik btrfs_extent_buffer_leak_debug_check(fs_info); 15440d4b0463SJosef Bacik kfree(fs_info->super_copy); 15450d4b0463SJosef Bacik kfree(fs_info->super_for_commit); 15460d4b0463SJosef Bacik kvfree(fs_info); 15470d4b0463SJosef Bacik } 15480d4b0463SJosef Bacik 15490d4b0463SJosef Bacik 15502dfb1e43SQu Wenruo /* 15512dfb1e43SQu Wenruo * Get an in-memory reference of a root structure. 15522dfb1e43SQu Wenruo * 15532dfb1e43SQu Wenruo * For essential trees like root/extent tree, we grab it from fs_info directly. 15542dfb1e43SQu Wenruo * For subvolume trees, we check the cached filesystem roots first. If not 15552dfb1e43SQu Wenruo * found, then read it from disk and add it to cached fs roots. 15562dfb1e43SQu Wenruo * 15572dfb1e43SQu Wenruo * Caller should release the root by calling btrfs_put_root() after the usage. 15582dfb1e43SQu Wenruo * 15592dfb1e43SQu Wenruo * NOTE: Reloc and log trees can't be read by this function as they share the 15602dfb1e43SQu Wenruo * same root objectid. 15612dfb1e43SQu Wenruo * 15622dfb1e43SQu Wenruo * @objectid: root id 15632dfb1e43SQu Wenruo * @anon_dev: preallocated anonymous block device number for new roots, 15642dfb1e43SQu Wenruo * pass 0 for new allocation. 15652dfb1e43SQu Wenruo * @check_ref: whether to check root item references, If true, return -ENOENT 15662dfb1e43SQu Wenruo * for orphan roots 15672dfb1e43SQu Wenruo */ 15682dfb1e43SQu Wenruo static struct btrfs_root *btrfs_get_root_ref(struct btrfs_fs_info *fs_info, 15692dfb1e43SQu Wenruo u64 objectid, dev_t anon_dev, 15702dfb1e43SQu Wenruo bool check_ref) 15715eda7b5eSChris Mason { 15725eda7b5eSChris Mason struct btrfs_root *root; 1573381cf658SDavid Sterba struct btrfs_path *path; 15741d4c08e0SDavid Sterba struct btrfs_key key; 15755eda7b5eSChris Mason int ret; 15765eda7b5eSChris Mason 157756e9357aSDavid Sterba if (objectid == BTRFS_ROOT_TREE_OBJECTID) 157800246528SJosef Bacik return btrfs_grab_root(fs_info->tree_root); 157956e9357aSDavid Sterba if (objectid == BTRFS_EXTENT_TREE_OBJECTID) 158000246528SJosef Bacik return btrfs_grab_root(fs_info->extent_root); 158156e9357aSDavid Sterba if (objectid == BTRFS_CHUNK_TREE_OBJECTID) 158200246528SJosef Bacik return btrfs_grab_root(fs_info->chunk_root); 158356e9357aSDavid Sterba if (objectid == BTRFS_DEV_TREE_OBJECTID) 158400246528SJosef Bacik return btrfs_grab_root(fs_info->dev_root); 158556e9357aSDavid Sterba if (objectid == BTRFS_CSUM_TREE_OBJECTID) 158600246528SJosef Bacik return btrfs_grab_root(fs_info->csum_root); 158756e9357aSDavid Sterba if (objectid == BTRFS_QUOTA_TREE_OBJECTID) 158800246528SJosef Bacik return btrfs_grab_root(fs_info->quota_root) ? 1589bc44d7c4SJosef Bacik fs_info->quota_root : ERR_PTR(-ENOENT); 159056e9357aSDavid Sterba if (objectid == BTRFS_UUID_TREE_OBJECTID) 159100246528SJosef Bacik return btrfs_grab_root(fs_info->uuid_root) ? 1592bc44d7c4SJosef Bacik fs_info->uuid_root : ERR_PTR(-ENOENT); 159356e9357aSDavid Sterba if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 159400246528SJosef Bacik return btrfs_grab_root(fs_info->free_space_root) ? 1595bc44d7c4SJosef Bacik fs_info->free_space_root : ERR_PTR(-ENOENT); 15964df27c4dSYan, Zheng again: 159756e9357aSDavid Sterba root = btrfs_lookup_fs_root(fs_info, objectid); 159848475471SStefan Behrens if (root) { 15992dfb1e43SQu Wenruo /* Shouldn't get preallocated anon_dev for cached roots */ 16002dfb1e43SQu Wenruo ASSERT(!anon_dev); 1601bc44d7c4SJosef Bacik if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 160200246528SJosef Bacik btrfs_put_root(root); 160348475471SStefan Behrens return ERR_PTR(-ENOENT); 1604bc44d7c4SJosef Bacik } 16055eda7b5eSChris Mason return root; 160648475471SStefan Behrens } 16075eda7b5eSChris Mason 160856e9357aSDavid Sterba key.objectid = objectid; 160956e9357aSDavid Sterba key.type = BTRFS_ROOT_ITEM_KEY; 161056e9357aSDavid Sterba key.offset = (u64)-1; 161156e9357aSDavid Sterba root = btrfs_read_tree_root(fs_info->tree_root, &key); 16125eda7b5eSChris Mason if (IS_ERR(root)) 16135eda7b5eSChris Mason return root; 16143394e160SChris Mason 1615c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1616d68fc57bSYan, Zheng ret = -ENOENT; 1617d68fc57bSYan, Zheng goto fail; 1618d68fc57bSYan, Zheng } 1619d68fc57bSYan, Zheng 16202dfb1e43SQu Wenruo ret = btrfs_init_fs_root(root, anon_dev); 1621cb517eabSMiao Xie if (ret) 1622cb517eabSMiao Xie goto fail; 1623cb517eabSMiao Xie 1624381cf658SDavid Sterba path = btrfs_alloc_path(); 1625381cf658SDavid Sterba if (!path) { 1626381cf658SDavid Sterba ret = -ENOMEM; 1627381cf658SDavid Sterba goto fail; 1628381cf658SDavid Sterba } 16291d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 16301d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 163156e9357aSDavid Sterba key.offset = objectid; 16321d4c08e0SDavid Sterba 16331d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1634381cf658SDavid Sterba btrfs_free_path(path); 1635d68fc57bSYan, Zheng if (ret < 0) 1636d68fc57bSYan, Zheng goto fail; 1637d68fc57bSYan, Zheng if (ret == 0) 163827cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1639d68fc57bSYan, Zheng 1640cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 16410f7d52f4SChris Mason if (ret) { 164200246528SJosef Bacik btrfs_put_root(root); 16434785e24fSJosef Bacik if (ret == -EEXIST) 16444df27c4dSYan, Zheng goto again; 16454df27c4dSYan, Zheng goto fail; 16464df27c4dSYan, Zheng } 1647edbd8d4eSChris Mason return root; 16484df27c4dSYan, Zheng fail: 16498c38938cSJosef Bacik btrfs_put_root(root); 16504df27c4dSYan, Zheng return ERR_PTR(ret); 1651edbd8d4eSChris Mason } 1652edbd8d4eSChris Mason 16532dfb1e43SQu Wenruo /* 16542dfb1e43SQu Wenruo * Get in-memory reference of a root structure 16552dfb1e43SQu Wenruo * 16562dfb1e43SQu Wenruo * @objectid: tree objectid 16572dfb1e43SQu Wenruo * @check_ref: if set, verify that the tree exists and the item has at least 16582dfb1e43SQu Wenruo * one reference 16592dfb1e43SQu Wenruo */ 16602dfb1e43SQu Wenruo struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 16612dfb1e43SQu Wenruo u64 objectid, bool check_ref) 16622dfb1e43SQu Wenruo { 16632dfb1e43SQu Wenruo return btrfs_get_root_ref(fs_info, objectid, 0, check_ref); 16642dfb1e43SQu Wenruo } 16652dfb1e43SQu Wenruo 16662dfb1e43SQu Wenruo /* 16672dfb1e43SQu Wenruo * Get in-memory reference of a root structure, created as new, optionally pass 16682dfb1e43SQu Wenruo * the anonymous block device id 16692dfb1e43SQu Wenruo * 16702dfb1e43SQu Wenruo * @objectid: tree objectid 16712dfb1e43SQu Wenruo * @anon_dev: if zero, allocate a new anonymous block device or use the 16722dfb1e43SQu Wenruo * parameter value 16732dfb1e43SQu Wenruo */ 16742dfb1e43SQu Wenruo struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info, 16752dfb1e43SQu Wenruo u64 objectid, dev_t anon_dev) 16762dfb1e43SQu Wenruo { 16772dfb1e43SQu Wenruo return btrfs_get_root_ref(fs_info, objectid, anon_dev, true); 16782dfb1e43SQu Wenruo } 16792dfb1e43SQu Wenruo 168004160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 168104160088SChris Mason { 168204160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 168304160088SChris Mason int ret = 0; 168404160088SChris Mason struct btrfs_device *device; 168504160088SChris Mason struct backing_dev_info *bdi; 1686b7967db7SChris Mason 16871f78160cSXiao Guangrong rcu_read_lock(); 16881f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1689dfe25020SChris Mason if (!device->bdev) 1690dfe25020SChris Mason continue; 1691efa7c9f9SJan Kara bdi = device->bdev->bd_bdi; 1692ff9ea323STejun Heo if (bdi_congested(bdi, bdi_bits)) { 169304160088SChris Mason ret = 1; 169404160088SChris Mason break; 169504160088SChris Mason } 169604160088SChris Mason } 16971f78160cSXiao Guangrong rcu_read_unlock(); 169804160088SChris Mason return ret; 169904160088SChris Mason } 170004160088SChris Mason 17018b712842SChris Mason /* 17028b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 17038b712842SChris Mason * functions. This is where read checksum verification actually happens 17048b712842SChris Mason */ 17058b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1706ce9adaa5SChris Mason { 1707ce9adaa5SChris Mason struct bio *bio; 170897eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1709ce9adaa5SChris Mason 171097eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1711ce9adaa5SChris Mason bio = end_io_wq->bio; 17128b712842SChris Mason 17134e4cbee9SChristoph Hellwig bio->bi_status = end_io_wq->status; 1714ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1715ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 17164246a0b6SChristoph Hellwig bio_endio(bio); 17179be490f1SOmar Sandoval kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 1718ce9adaa5SChris Mason } 171944b8bd7eSChris Mason 1720a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1721a74a4b97SChris Mason { 1722a74a4b97SChris Mason struct btrfs_root *root = arg; 17230b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1724d0278245SMiao Xie int again; 1725a74a4b97SChris Mason 1726d6fd0ae2SOmar Sandoval while (1) { 1727d0278245SMiao Xie again = 0; 17289d1a2a3aSDavid Sterba 1729fd340d0fSJosef Bacik set_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1730fd340d0fSJosef Bacik 1731d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 17322ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) 1733d0278245SMiao Xie goto sleep; 1734d0278245SMiao Xie 173590c711abSZygo Blaxell /* 173690c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 173790c711abSZygo Blaxell * before we have finished mounting the filesystem. 173890c711abSZygo Blaxell */ 17390b246afaSJeff Mahoney if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags)) 174090c711abSZygo Blaxell goto sleep; 174190c711abSZygo Blaxell 17420b246afaSJeff Mahoney if (!mutex_trylock(&fs_info->cleaner_mutex)) 1743d0278245SMiao Xie goto sleep; 1744d0278245SMiao Xie 1745dc7f370cSMiao Xie /* 1746dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1747dc7f370cSMiao Xie * during the above check and trylock. 1748dc7f370cSMiao Xie */ 17492ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) { 17500b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1751dc7f370cSMiao Xie goto sleep; 1752dc7f370cSMiao Xie } 1753dc7f370cSMiao Xie 17542ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 1755c2d6cb16SFilipe Manana 17569d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 17570b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1758a74a4b97SChris Mason 1759d0278245SMiao Xie /* 176005323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 176105323cd1SMiao Xie * needn't do anything special here. 1762d0278245SMiao Xie */ 17630b246afaSJeff Mahoney btrfs_run_defrag_inodes(fs_info); 176467c5e7d4SFilipe Manana 176567c5e7d4SFilipe Manana /* 176667c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 176767c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 176867c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 176967c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 177067c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 177167c5e7d4SFilipe Manana * unused block groups. 177267c5e7d4SFilipe Manana */ 17730b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 1774d0278245SMiao Xie sleep: 1775fd340d0fSJosef Bacik clear_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1776d6fd0ae2SOmar Sandoval if (kthread_should_park()) 1777d6fd0ae2SOmar Sandoval kthread_parkme(); 1778d6fd0ae2SOmar Sandoval if (kthread_should_stop()) 1779d6fd0ae2SOmar Sandoval return 0; 1780838fe188SJiri Kosina if (!again) { 1781a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 1782a74a4b97SChris Mason schedule(); 1783a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1784a74a4b97SChris Mason } 1785da288d28SFilipe Manana } 1786a74a4b97SChris Mason } 1787a74a4b97SChris Mason 1788a74a4b97SChris Mason static int transaction_kthread(void *arg) 1789a74a4b97SChris Mason { 1790a74a4b97SChris Mason struct btrfs_root *root = arg; 17910b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1792a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1793a74a4b97SChris Mason struct btrfs_transaction *cur; 17948929ecfaSYan, Zheng u64 transid; 1795a944442cSAllen Pais time64_t now; 1796a74a4b97SChris Mason unsigned long delay; 1797914b2007SJan Kara bool cannot_commit; 1798a74a4b97SChris Mason 1799a74a4b97SChris Mason do { 1800914b2007SJan Kara cannot_commit = false; 18010b246afaSJeff Mahoney delay = HZ * fs_info->commit_interval; 18020b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 1803a74a4b97SChris Mason 18040b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 18050b246afaSJeff Mahoney cur = fs_info->running_transaction; 1806a74a4b97SChris Mason if (!cur) { 18070b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1808a74a4b97SChris Mason goto sleep; 1809a74a4b97SChris Mason } 181031153d81SYan Zheng 1811afd48513SArnd Bergmann now = ktime_get_seconds(); 18123296bf56SQu Wenruo if (cur->state < TRANS_STATE_COMMIT_START && 18138b87dc17SDavid Sterba (now < cur->start_time || 18140b246afaSJeff Mahoney now - cur->start_time < fs_info->commit_interval)) { 18150b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1816a74a4b97SChris Mason delay = HZ * 5; 1817a74a4b97SChris Mason goto sleep; 1818a74a4b97SChris Mason } 18198929ecfaSYan, Zheng transid = cur->transid; 18200b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 182156bec294SChris Mason 182279787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1823354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1824914b2007SJan Kara if (IS_ERR(trans)) { 1825354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1826914b2007SJan Kara cannot_commit = true; 182779787eaaSJeff Mahoney goto sleep; 1828914b2007SJan Kara } 18298929ecfaSYan, Zheng if (transid == trans->transid) { 18303a45bb20SJeff Mahoney btrfs_commit_transaction(trans); 18318929ecfaSYan, Zheng } else { 18323a45bb20SJeff Mahoney btrfs_end_transaction(trans); 18338929ecfaSYan, Zheng } 1834a74a4b97SChris Mason sleep: 18350b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 18360b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 1837a74a4b97SChris Mason 18384e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 18390b246afaSJeff Mahoney &fs_info->fs_state))) 18402ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 18418929ecfaSYan, Zheng if (!kthread_should_stop() && 18420b246afaSJeff Mahoney (!btrfs_transaction_blocked(fs_info) || 1843914b2007SJan Kara cannot_commit)) 1844bc5511d0SNikolay Borisov schedule_timeout_interruptible(delay); 1845a74a4b97SChris Mason } while (!kthread_should_stop()); 1846a74a4b97SChris Mason return 0; 1847a74a4b97SChris Mason } 1848a74a4b97SChris Mason 1849af31f5e5SChris Mason /* 185001f0f9daSNikolay Borisov * This will find the highest generation in the array of root backups. The 185101f0f9daSNikolay Borisov * index of the highest array is returned, or -EINVAL if we can't find 185201f0f9daSNikolay Borisov * anything. 1853af31f5e5SChris Mason * 1854af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1855af31f5e5SChris Mason * generation of the latest root in the array with the generation 1856af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1857af31f5e5SChris Mason */ 185801f0f9daSNikolay Borisov static int find_newest_super_backup(struct btrfs_fs_info *info) 1859af31f5e5SChris Mason { 186001f0f9daSNikolay Borisov const u64 newest_gen = btrfs_super_generation(info->super_copy); 1861af31f5e5SChris Mason u64 cur; 1862af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1863af31f5e5SChris Mason int i; 1864af31f5e5SChris Mason 1865af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1866af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1867af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1868af31f5e5SChris Mason if (cur == newest_gen) 186901f0f9daSNikolay Borisov return i; 1870af31f5e5SChris Mason } 1871af31f5e5SChris Mason 187201f0f9daSNikolay Borisov return -EINVAL; 1873af31f5e5SChris Mason } 1874af31f5e5SChris Mason 1875af31f5e5SChris Mason /* 1876af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1877af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1878af31f5e5SChris Mason * done 1879af31f5e5SChris Mason */ 1880af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1881af31f5e5SChris Mason { 18826ef108ddSNikolay Borisov const int next_backup = info->backup_root_index; 1883af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1884af31f5e5SChris Mason 1885af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1886af31f5e5SChris Mason 1887af31f5e5SChris Mason /* 1888af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1889af31f5e5SChris Mason * regardless of which ones we use today 1890af31f5e5SChris Mason */ 1891af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1892af31f5e5SChris Mason 1893af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1894af31f5e5SChris Mason 1895af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1896af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1897af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1898af31f5e5SChris Mason 1899af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1900af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1901af31f5e5SChris Mason 1902af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1903af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1904af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1905af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1906af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1907af31f5e5SChris Mason 1908af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1909af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1910af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1911af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1912af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1913af31f5e5SChris Mason 19147c7e82a7SChris Mason /* 19157c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 19167c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 19177c7e82a7SChris Mason */ 19187c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 19197c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 19207c7e82a7SChris Mason info->fs_root->node->start); 1921af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1922af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1923af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1924af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 19257c7e82a7SChris Mason } 1926af31f5e5SChris Mason 1927af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1928af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1929af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1930af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1931af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1932af31f5e5SChris Mason 1933af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1934af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1935af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1936af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1937af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1938af31f5e5SChris Mason 1939af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1940af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1941af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1942af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1943af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1944af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1945af31f5e5SChris Mason 1946af31f5e5SChris Mason /* 1947af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1948af31f5e5SChris Mason * for the next commit 1949af31f5e5SChris Mason */ 1950af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1951af31f5e5SChris Mason &info->super_for_commit->super_roots, 1952af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1953af31f5e5SChris Mason } 1954af31f5e5SChris Mason 1955af31f5e5SChris Mason /* 1956bd2336b2SNikolay Borisov * read_backup_root - Reads a backup root based on the passed priority. Prio 0 1957bd2336b2SNikolay Borisov * is the newest, prio 1/2/3 are 2nd newest/3rd newest/4th (oldest) backup roots 1958bd2336b2SNikolay Borisov * 1959bd2336b2SNikolay Borisov * fs_info - filesystem whose backup roots need to be read 1960bd2336b2SNikolay Borisov * priority - priority of backup root required 1961bd2336b2SNikolay Borisov * 1962bd2336b2SNikolay Borisov * Returns backup root index on success and -EINVAL otherwise. 1963bd2336b2SNikolay Borisov */ 1964bd2336b2SNikolay Borisov static int read_backup_root(struct btrfs_fs_info *fs_info, u8 priority) 1965bd2336b2SNikolay Borisov { 1966bd2336b2SNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 1967bd2336b2SNikolay Borisov struct btrfs_super_block *super = fs_info->super_copy; 1968bd2336b2SNikolay Borisov struct btrfs_root_backup *root_backup; 1969bd2336b2SNikolay Borisov 1970bd2336b2SNikolay Borisov if (priority < BTRFS_NUM_BACKUP_ROOTS && backup_index >= 0) { 1971bd2336b2SNikolay Borisov if (priority == 0) 1972bd2336b2SNikolay Borisov return backup_index; 1973bd2336b2SNikolay Borisov 1974bd2336b2SNikolay Borisov backup_index = backup_index + BTRFS_NUM_BACKUP_ROOTS - priority; 1975bd2336b2SNikolay Borisov backup_index %= BTRFS_NUM_BACKUP_ROOTS; 1976bd2336b2SNikolay Borisov } else { 1977bd2336b2SNikolay Borisov return -EINVAL; 1978bd2336b2SNikolay Borisov } 1979bd2336b2SNikolay Borisov 1980bd2336b2SNikolay Borisov root_backup = super->super_roots + backup_index; 1981bd2336b2SNikolay Borisov 1982bd2336b2SNikolay Borisov btrfs_set_super_generation(super, 1983bd2336b2SNikolay Borisov btrfs_backup_tree_root_gen(root_backup)); 1984bd2336b2SNikolay Borisov btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1985bd2336b2SNikolay Borisov btrfs_set_super_root_level(super, 1986bd2336b2SNikolay Borisov btrfs_backup_tree_root_level(root_backup)); 1987bd2336b2SNikolay Borisov btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1988bd2336b2SNikolay Borisov 1989bd2336b2SNikolay Borisov /* 1990bd2336b2SNikolay Borisov * Fixme: the total bytes and num_devices need to match or we should 1991bd2336b2SNikolay Borisov * need a fsck 1992bd2336b2SNikolay Borisov */ 1993bd2336b2SNikolay Borisov btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1994bd2336b2SNikolay Borisov btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1995bd2336b2SNikolay Borisov 1996bd2336b2SNikolay Borisov return backup_index; 1997bd2336b2SNikolay Borisov } 1998bd2336b2SNikolay Borisov 19997abadb64SLiu Bo /* helper to cleanup workers */ 20007abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 20017abadb64SLiu Bo { 2002dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 2003afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 20045cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 2005fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 2006fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 2007d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 2008fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 2009fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 20105b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 2011e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 2012736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 2013a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 2014fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 2015b0643e59SDennis Zhou if (fs_info->discard_ctl.discard_workers) 2016b0643e59SDennis Zhou destroy_workqueue(fs_info->discard_ctl.discard_workers); 2017a9b9477dSFilipe Manana /* 2018a9b9477dSFilipe Manana * Now that all other work queues are destroyed, we can safely destroy 2019a9b9477dSFilipe Manana * the queues used for metadata I/O, since tasks from those other work 2020a9b9477dSFilipe Manana * queues can do metadata I/O operations. 2021a9b9477dSFilipe Manana */ 2022a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_workers); 2023a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 20247abadb64SLiu Bo } 20257abadb64SLiu Bo 20262e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 20272e9f5954SRashika { 20282e9f5954SRashika if (root) { 20292e9f5954SRashika free_extent_buffer(root->node); 20302e9f5954SRashika free_extent_buffer(root->commit_root); 20312e9f5954SRashika root->node = NULL; 20322e9f5954SRashika root->commit_root = NULL; 20332e9f5954SRashika } 20342e9f5954SRashika } 20352e9f5954SRashika 2036af31f5e5SChris Mason /* helper to cleanup tree roots */ 20374273eaffSAnand Jain static void free_root_pointers(struct btrfs_fs_info *info, bool free_chunk_root) 2038af31f5e5SChris Mason { 20392e9f5954SRashika free_root_extent_buffers(info->tree_root); 2040655b09feSJosef Bacik 20412e9f5954SRashika free_root_extent_buffers(info->dev_root); 20422e9f5954SRashika free_root_extent_buffers(info->extent_root); 20432e9f5954SRashika free_root_extent_buffers(info->csum_root); 20442e9f5954SRashika free_root_extent_buffers(info->quota_root); 20452e9f5954SRashika free_root_extent_buffers(info->uuid_root); 20468c38938cSJosef Bacik free_root_extent_buffers(info->fs_root); 2047aeb935a4SQu Wenruo free_root_extent_buffers(info->data_reloc_root); 20484273eaffSAnand Jain if (free_chunk_root) 20492e9f5954SRashika free_root_extent_buffers(info->chunk_root); 205070f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 2051af31f5e5SChris Mason } 2052af31f5e5SChris Mason 20538c38938cSJosef Bacik void btrfs_put_root(struct btrfs_root *root) 20548c38938cSJosef Bacik { 20558c38938cSJosef Bacik if (!root) 20568c38938cSJosef Bacik return; 20578c38938cSJosef Bacik 20588c38938cSJosef Bacik if (refcount_dec_and_test(&root->refs)) { 20598c38938cSJosef Bacik WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 20601dae7e0eSQu Wenruo WARN_ON(test_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state)); 20618c38938cSJosef Bacik if (root->anon_dev) 20628c38938cSJosef Bacik free_anon_bdev(root->anon_dev); 20638c38938cSJosef Bacik btrfs_drew_lock_destroy(&root->snapshot_lock); 2064923eb523SJohannes Thumshirn free_root_extent_buffers(root); 20658c38938cSJosef Bacik kfree(root->free_ino_ctl); 20668c38938cSJosef Bacik kfree(root->free_ino_pinned); 20678c38938cSJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 20688c38938cSJosef Bacik spin_lock(&root->fs_info->fs_roots_radix_lock); 20698c38938cSJosef Bacik list_del_init(&root->leak_list); 20708c38938cSJosef Bacik spin_unlock(&root->fs_info->fs_roots_radix_lock); 20718c38938cSJosef Bacik #endif 20728c38938cSJosef Bacik kfree(root); 20738c38938cSJosef Bacik } 20748c38938cSJosef Bacik } 20758c38938cSJosef Bacik 2076faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 2077171f6537SJosef Bacik { 2078171f6537SJosef Bacik int ret; 2079171f6537SJosef Bacik struct btrfs_root *gang[8]; 2080171f6537SJosef Bacik int i; 2081171f6537SJosef Bacik 2082171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2083171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2084171f6537SJosef Bacik struct btrfs_root, root_list); 2085171f6537SJosef Bacik list_del(&gang[0]->root_list); 2086171f6537SJosef Bacik 20878c38938cSJosef Bacik if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) 2088cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 208900246528SJosef Bacik btrfs_put_root(gang[0]); 2090171f6537SJosef Bacik } 2091171f6537SJosef Bacik 2092171f6537SJosef Bacik while (1) { 2093171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2094171f6537SJosef Bacik (void **)gang, 0, 2095171f6537SJosef Bacik ARRAY_SIZE(gang)); 2096171f6537SJosef Bacik if (!ret) 2097171f6537SJosef Bacik break; 2098171f6537SJosef Bacik for (i = 0; i < ret; i++) 2099cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2100171f6537SJosef Bacik } 2101171f6537SJosef Bacik } 2102af31f5e5SChris Mason 2103638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2104638aa7edSEric Sandeen { 2105638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2106638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2107638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2108638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2109638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2110638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2111ff09c4caSAnand Jain refcount_set(&fs_info->scrub_workers_refcnt, 0); 2112638aa7edSEric Sandeen } 2113638aa7edSEric Sandeen 2114779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2115779a65a4SEric Sandeen { 2116779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2117779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2118779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2119779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2120779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2121779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2122779a65a4SEric Sandeen } 2123779a65a4SEric Sandeen 21246bccf3abSJeff Mahoney static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info) 2125f37938e0SEric Sandeen { 21262ff7e61eSJeff Mahoney struct inode *inode = fs_info->btree_inode; 21272ff7e61eSJeff Mahoney 21282ff7e61eSJeff Mahoney inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 21292ff7e61eSJeff Mahoney set_nlink(inode, 1); 2130f37938e0SEric Sandeen /* 2131f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2132f37938e0SEric Sandeen * the real end of the address space is determined by all of 2133f37938e0SEric Sandeen * the devices in the system 2134f37938e0SEric Sandeen */ 21352ff7e61eSJeff Mahoney inode->i_size = OFFSET_MAX; 21362ff7e61eSJeff Mahoney inode->i_mapping->a_ops = &btree_aops; 2137f37938e0SEric Sandeen 21382ff7e61eSJeff Mahoney RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node); 213943eb5f29SQu Wenruo extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree, 214043eb5f29SQu Wenruo IO_TREE_INODE_IO, inode); 21417b439738SDavid Sterba BTRFS_I(inode)->io_tree.track_uptodate = false; 21422ff7e61eSJeff Mahoney extent_map_tree_init(&BTRFS_I(inode)->extent_tree); 2143f37938e0SEric Sandeen 21442ff7e61eSJeff Mahoney BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops; 2145f37938e0SEric Sandeen 21465c8fd99fSJosef Bacik BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root); 21472ff7e61eSJeff Mahoney memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key)); 21482ff7e61eSJeff Mahoney set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags); 21492ff7e61eSJeff Mahoney btrfs_insert_inode_hash(inode); 2150f37938e0SEric Sandeen } 2151f37938e0SEric Sandeen 2152ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2153ad618368SEric Sandeen { 2154ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2155129827e3SDavid Sterba init_rwsem(&fs_info->dev_replace.rwsem); 21567f8d236aSDavid Sterba init_waitqueue_head(&fs_info->dev_replace.replace_wait); 2157ad618368SEric Sandeen } 2158ad618368SEric Sandeen 2159f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2160f9e92e40SEric Sandeen { 2161f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2162f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2163f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2164f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2165f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2166f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2167d2c609b8SJeff Mahoney fs_info->qgroup_rescan_running = false; 2168f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2169f9e92e40SEric Sandeen } 2170f9e92e40SEric Sandeen 21712a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 21722a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 21732a458198SEric Sandeen { 2174f7b885beSAnand Jain u32 max_active = fs_info->thread_pool_size; 21756f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 21762a458198SEric Sandeen 21772a458198SEric Sandeen fs_info->workers = 2178cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2179cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 21802a458198SEric Sandeen 21812a458198SEric Sandeen fs_info->delalloc_workers = 2182cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2183cb001095SJeff Mahoney flags, max_active, 2); 21842a458198SEric Sandeen 21852a458198SEric Sandeen fs_info->flush_workers = 2186cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2187cb001095SJeff Mahoney flags, max_active, 0); 21882a458198SEric Sandeen 21892a458198SEric Sandeen fs_info->caching_workers = 2190cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 21912a458198SEric Sandeen 21922a458198SEric Sandeen fs_info->fixup_workers = 2193cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 21942a458198SEric Sandeen 21952a458198SEric Sandeen /* 21962a458198SEric Sandeen * endios are largely parallel and should have a very 21972a458198SEric Sandeen * low idle thresh 21982a458198SEric Sandeen */ 21992a458198SEric Sandeen fs_info->endio_workers = 2200cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 22012a458198SEric Sandeen fs_info->endio_meta_workers = 2202cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2203cb001095SJeff Mahoney max_active, 4); 22042a458198SEric Sandeen fs_info->endio_meta_write_workers = 2205cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2206cb001095SJeff Mahoney max_active, 2); 22072a458198SEric Sandeen fs_info->endio_raid56_workers = 2208cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2209cb001095SJeff Mahoney max_active, 4); 22102a458198SEric Sandeen fs_info->rmw_workers = 2211cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 22122a458198SEric Sandeen fs_info->endio_write_workers = 2213cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2214cb001095SJeff Mahoney max_active, 2); 22152a458198SEric Sandeen fs_info->endio_freespace_worker = 2216cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2217cb001095SJeff Mahoney max_active, 0); 22182a458198SEric Sandeen fs_info->delayed_workers = 2219cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2220cb001095SJeff Mahoney max_active, 0); 22212a458198SEric Sandeen fs_info->readahead_workers = 2222cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2223cb001095SJeff Mahoney max_active, 2); 22242a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2225cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 2226b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers = 2227b0643e59SDennis Zhou alloc_workqueue("btrfs_discard", WQ_UNBOUND | WQ_FREEZABLE, 1); 22282a458198SEric Sandeen 22292a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 2230ba8a9d07SChris Mason fs_info->flush_workers && 22312a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 22322a458198SEric Sandeen fs_info->endio_meta_write_workers && 22332a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 22342a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 22352a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 22362a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 2237b0643e59SDennis Zhou fs_info->qgroup_rescan_workers && 2238b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers)) { 22392a458198SEric Sandeen return -ENOMEM; 22402a458198SEric Sandeen } 22412a458198SEric Sandeen 22422a458198SEric Sandeen return 0; 22432a458198SEric Sandeen } 22442a458198SEric Sandeen 22456d97c6e3SJohannes Thumshirn static int btrfs_init_csum_hash(struct btrfs_fs_info *fs_info, u16 csum_type) 22466d97c6e3SJohannes Thumshirn { 22476d97c6e3SJohannes Thumshirn struct crypto_shash *csum_shash; 2248b4e967beSDavid Sterba const char *csum_driver = btrfs_super_csum_driver(csum_type); 22496d97c6e3SJohannes Thumshirn 2250b4e967beSDavid Sterba csum_shash = crypto_alloc_shash(csum_driver, 0, 0); 22516d97c6e3SJohannes Thumshirn 22526d97c6e3SJohannes Thumshirn if (IS_ERR(csum_shash)) { 22536d97c6e3SJohannes Thumshirn btrfs_err(fs_info, "error allocating %s hash for checksum", 2254b4e967beSDavid Sterba csum_driver); 22556d97c6e3SJohannes Thumshirn return PTR_ERR(csum_shash); 22566d97c6e3SJohannes Thumshirn } 22576d97c6e3SJohannes Thumshirn 22586d97c6e3SJohannes Thumshirn fs_info->csum_shash = csum_shash; 22596d97c6e3SJohannes Thumshirn 22606d97c6e3SJohannes Thumshirn return 0; 22616d97c6e3SJohannes Thumshirn } 22626d97c6e3SJohannes Thumshirn 226363443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 226463443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 226563443bf5SEric Sandeen { 226663443bf5SEric Sandeen int ret; 226763443bf5SEric Sandeen struct btrfs_root *log_tree_root; 226863443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 226963443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 2270581c1760SQu Wenruo int level = btrfs_super_log_root_level(disk_super); 227163443bf5SEric Sandeen 227263443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2273f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 227463443bf5SEric Sandeen return -EIO; 227563443bf5SEric Sandeen } 227663443bf5SEric Sandeen 227796dfcb46SJosef Bacik log_tree_root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, 227896dfcb46SJosef Bacik GFP_KERNEL); 227963443bf5SEric Sandeen if (!log_tree_root) 228063443bf5SEric Sandeen return -ENOMEM; 228163443bf5SEric Sandeen 22822ff7e61eSJeff Mahoney log_tree_root->node = read_tree_block(fs_info, bytenr, 2283581c1760SQu Wenruo fs_info->generation + 1, 2284581c1760SQu Wenruo level, NULL); 228564c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2286f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 22870eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 22888c38938cSJosef Bacik log_tree_root->node = NULL; 228900246528SJosef Bacik btrfs_put_root(log_tree_root); 22900eeff236SLiu Bo return ret; 229164c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2292f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 229300246528SJosef Bacik btrfs_put_root(log_tree_root); 229463443bf5SEric Sandeen return -EIO; 229563443bf5SEric Sandeen } 229663443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 229763443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 229863443bf5SEric Sandeen if (ret) { 22990b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 230063443bf5SEric Sandeen "Failed to recover log tree"); 230100246528SJosef Bacik btrfs_put_root(log_tree_root); 230263443bf5SEric Sandeen return ret; 230363443bf5SEric Sandeen } 230463443bf5SEric Sandeen 2305bc98a42cSDavid Howells if (sb_rdonly(fs_info->sb)) { 23066bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 230763443bf5SEric Sandeen if (ret) 230863443bf5SEric Sandeen return ret; 230963443bf5SEric Sandeen } 231063443bf5SEric Sandeen 231163443bf5SEric Sandeen return 0; 231263443bf5SEric Sandeen } 231363443bf5SEric Sandeen 23146bccf3abSJeff Mahoney static int btrfs_read_roots(struct btrfs_fs_info *fs_info) 23154bbcaa64SEric Sandeen { 23166bccf3abSJeff Mahoney struct btrfs_root *tree_root = fs_info->tree_root; 2317a4f3d2c4SDavid Sterba struct btrfs_root *root; 23184bbcaa64SEric Sandeen struct btrfs_key location; 23194bbcaa64SEric Sandeen int ret; 23204bbcaa64SEric Sandeen 23216bccf3abSJeff Mahoney BUG_ON(!fs_info->tree_root); 23226bccf3abSJeff Mahoney 23234bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 23244bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 23254bbcaa64SEric Sandeen location.offset = 0; 23264bbcaa64SEric Sandeen 2327a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2328f50f4353SLiu Bo if (IS_ERR(root)) { 2329f50f4353SLiu Bo ret = PTR_ERR(root); 2330f50f4353SLiu Bo goto out; 2331f50f4353SLiu Bo } 2332a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2333a4f3d2c4SDavid Sterba fs_info->extent_root = root; 23344bbcaa64SEric Sandeen 23354bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2336a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2337f50f4353SLiu Bo if (IS_ERR(root)) { 2338f50f4353SLiu Bo ret = PTR_ERR(root); 2339f50f4353SLiu Bo goto out; 2340f50f4353SLiu Bo } 2341a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2342a4f3d2c4SDavid Sterba fs_info->dev_root = root; 23434bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 23444bbcaa64SEric Sandeen 23454bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2346a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2347f50f4353SLiu Bo if (IS_ERR(root)) { 2348f50f4353SLiu Bo ret = PTR_ERR(root); 2349f50f4353SLiu Bo goto out; 2350f50f4353SLiu Bo } 2351a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2352a4f3d2c4SDavid Sterba fs_info->csum_root = root; 23534bbcaa64SEric Sandeen 2354aeb935a4SQu Wenruo /* 2355aeb935a4SQu Wenruo * This tree can share blocks with some other fs tree during relocation 2356aeb935a4SQu Wenruo * and we need a proper setup by btrfs_get_fs_root 2357aeb935a4SQu Wenruo */ 235856e9357aSDavid Sterba root = btrfs_get_fs_root(tree_root->fs_info, 235956e9357aSDavid Sterba BTRFS_DATA_RELOC_TREE_OBJECTID, true); 2360aeb935a4SQu Wenruo if (IS_ERR(root)) { 2361aeb935a4SQu Wenruo ret = PTR_ERR(root); 2362aeb935a4SQu Wenruo goto out; 2363aeb935a4SQu Wenruo } 2364aeb935a4SQu Wenruo set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2365aeb935a4SQu Wenruo fs_info->data_reloc_root = root; 2366aeb935a4SQu Wenruo 23674bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2368a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2369a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2370a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2371afcdd129SJosef Bacik set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); 2372a4f3d2c4SDavid Sterba fs_info->quota_root = root; 23734bbcaa64SEric Sandeen } 23744bbcaa64SEric Sandeen 23754bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2376a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2377a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2378a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 23794bbcaa64SEric Sandeen if (ret != -ENOENT) 2380f50f4353SLiu Bo goto out; 23814bbcaa64SEric Sandeen } else { 2382a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2383a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 23844bbcaa64SEric Sandeen } 23854bbcaa64SEric Sandeen 238670f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 238770f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 238870f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 2389f50f4353SLiu Bo if (IS_ERR(root)) { 2390f50f4353SLiu Bo ret = PTR_ERR(root); 2391f50f4353SLiu Bo goto out; 2392f50f4353SLiu Bo } 239370f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 239470f6d82eSOmar Sandoval fs_info->free_space_root = root; 239570f6d82eSOmar Sandoval } 239670f6d82eSOmar Sandoval 23974bbcaa64SEric Sandeen return 0; 2398f50f4353SLiu Bo out: 2399f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read root (objectid=%llu): %d", 2400f50f4353SLiu Bo location.objectid, ret); 2401f50f4353SLiu Bo return ret; 24024bbcaa64SEric Sandeen } 24034bbcaa64SEric Sandeen 2404069ec957SQu Wenruo /* 2405069ec957SQu Wenruo * Real super block validation 2406069ec957SQu Wenruo * NOTE: super csum type and incompat features will not be checked here. 2407069ec957SQu Wenruo * 2408069ec957SQu Wenruo * @sb: super block to check 2409069ec957SQu Wenruo * @mirror_num: the super block number to check its bytenr: 2410069ec957SQu Wenruo * 0 the primary (1st) sb 2411069ec957SQu Wenruo * 1, 2 2nd and 3rd backup copy 2412069ec957SQu Wenruo * -1 skip bytenr check 2413069ec957SQu Wenruo */ 2414069ec957SQu Wenruo static int validate_super(struct btrfs_fs_info *fs_info, 2415069ec957SQu Wenruo struct btrfs_super_block *sb, int mirror_num) 241621a852b0SQu Wenruo { 241721a852b0SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 241821a852b0SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 241921a852b0SQu Wenruo int ret = 0; 242021a852b0SQu Wenruo 242121a852b0SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 242221a852b0SQu Wenruo btrfs_err(fs_info, "no valid FS found"); 242321a852b0SQu Wenruo ret = -EINVAL; 242421a852b0SQu Wenruo } 242521a852b0SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) { 242621a852b0SQu Wenruo btrfs_err(fs_info, "unrecognized or unsupported super flag: %llu", 242721a852b0SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 242821a852b0SQu Wenruo ret = -EINVAL; 242921a852b0SQu Wenruo } 243021a852b0SQu Wenruo if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 243121a852b0SQu Wenruo btrfs_err(fs_info, "tree_root level too big: %d >= %d", 243221a852b0SQu Wenruo btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 243321a852b0SQu Wenruo ret = -EINVAL; 243421a852b0SQu Wenruo } 243521a852b0SQu Wenruo if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 243621a852b0SQu Wenruo btrfs_err(fs_info, "chunk_root level too big: %d >= %d", 243721a852b0SQu Wenruo btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 243821a852b0SQu Wenruo ret = -EINVAL; 243921a852b0SQu Wenruo } 244021a852b0SQu Wenruo if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 244121a852b0SQu Wenruo btrfs_err(fs_info, "log_root level too big: %d >= %d", 244221a852b0SQu Wenruo btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 244321a852b0SQu Wenruo ret = -EINVAL; 244421a852b0SQu Wenruo } 244521a852b0SQu Wenruo 244621a852b0SQu Wenruo /* 244721a852b0SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 244821a852b0SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 244921a852b0SQu Wenruo */ 245021a852b0SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 245121a852b0SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 245221a852b0SQu Wenruo btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); 245321a852b0SQu Wenruo ret = -EINVAL; 245421a852b0SQu Wenruo } 245521a852b0SQu Wenruo /* Only PAGE SIZE is supported yet */ 245621a852b0SQu Wenruo if (sectorsize != PAGE_SIZE) { 245721a852b0SQu Wenruo btrfs_err(fs_info, 245821a852b0SQu Wenruo "sectorsize %llu not supported yet, only support %lu", 245921a852b0SQu Wenruo sectorsize, PAGE_SIZE); 246021a852b0SQu Wenruo ret = -EINVAL; 246121a852b0SQu Wenruo } 246221a852b0SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 246321a852b0SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 246421a852b0SQu Wenruo btrfs_err(fs_info, "invalid nodesize %llu", nodesize); 246521a852b0SQu Wenruo ret = -EINVAL; 246621a852b0SQu Wenruo } 246721a852b0SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 246821a852b0SQu Wenruo btrfs_err(fs_info, "invalid leafsize %u, should be %llu", 246921a852b0SQu Wenruo le32_to_cpu(sb->__unused_leafsize), nodesize); 247021a852b0SQu Wenruo ret = -EINVAL; 247121a852b0SQu Wenruo } 247221a852b0SQu Wenruo 247321a852b0SQu Wenruo /* Root alignment check */ 247421a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 247521a852b0SQu Wenruo btrfs_warn(fs_info, "tree_root block unaligned: %llu", 247621a852b0SQu Wenruo btrfs_super_root(sb)); 247721a852b0SQu Wenruo ret = -EINVAL; 247821a852b0SQu Wenruo } 247921a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 248021a852b0SQu Wenruo btrfs_warn(fs_info, "chunk_root block unaligned: %llu", 248121a852b0SQu Wenruo btrfs_super_chunk_root(sb)); 248221a852b0SQu Wenruo ret = -EINVAL; 248321a852b0SQu Wenruo } 248421a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 248521a852b0SQu Wenruo btrfs_warn(fs_info, "log_root block unaligned: %llu", 248621a852b0SQu Wenruo btrfs_super_log_root(sb)); 248721a852b0SQu Wenruo ret = -EINVAL; 248821a852b0SQu Wenruo } 248921a852b0SQu Wenruo 2490de37aa51SNikolay Borisov if (memcmp(fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid, 24917239ff4bSNikolay Borisov BTRFS_FSID_SIZE) != 0) { 249221a852b0SQu Wenruo btrfs_err(fs_info, 24937239ff4bSNikolay Borisov "dev_item UUID does not match metadata fsid: %pU != %pU", 2494de37aa51SNikolay Borisov fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid); 249521a852b0SQu Wenruo ret = -EINVAL; 249621a852b0SQu Wenruo } 249721a852b0SQu Wenruo 249821a852b0SQu Wenruo /* 249921a852b0SQu Wenruo * Hint to catch really bogus numbers, bitflips or so, more exact checks are 250021a852b0SQu Wenruo * done later 250121a852b0SQu Wenruo */ 250221a852b0SQu Wenruo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 250321a852b0SQu Wenruo btrfs_err(fs_info, "bytes_used is too small %llu", 250421a852b0SQu Wenruo btrfs_super_bytes_used(sb)); 250521a852b0SQu Wenruo ret = -EINVAL; 250621a852b0SQu Wenruo } 250721a852b0SQu Wenruo if (!is_power_of_2(btrfs_super_stripesize(sb))) { 250821a852b0SQu Wenruo btrfs_err(fs_info, "invalid stripesize %u", 250921a852b0SQu Wenruo btrfs_super_stripesize(sb)); 251021a852b0SQu Wenruo ret = -EINVAL; 251121a852b0SQu Wenruo } 251221a852b0SQu Wenruo if (btrfs_super_num_devices(sb) > (1UL << 31)) 251321a852b0SQu Wenruo btrfs_warn(fs_info, "suspicious number of devices: %llu", 251421a852b0SQu Wenruo btrfs_super_num_devices(sb)); 251521a852b0SQu Wenruo if (btrfs_super_num_devices(sb) == 0) { 251621a852b0SQu Wenruo btrfs_err(fs_info, "number of devices is 0"); 251721a852b0SQu Wenruo ret = -EINVAL; 251821a852b0SQu Wenruo } 251921a852b0SQu Wenruo 2520069ec957SQu Wenruo if (mirror_num >= 0 && 2521069ec957SQu Wenruo btrfs_super_bytenr(sb) != btrfs_sb_offset(mirror_num)) { 252221a852b0SQu Wenruo btrfs_err(fs_info, "super offset mismatch %llu != %u", 252321a852b0SQu Wenruo btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 252421a852b0SQu Wenruo ret = -EINVAL; 252521a852b0SQu Wenruo } 252621a852b0SQu Wenruo 252721a852b0SQu Wenruo /* 252821a852b0SQu Wenruo * Obvious sys_chunk_array corruptions, it must hold at least one key 252921a852b0SQu Wenruo * and one chunk 253021a852b0SQu Wenruo */ 253121a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 253221a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too big %u > %u", 253321a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 253421a852b0SQu Wenruo BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 253521a852b0SQu Wenruo ret = -EINVAL; 253621a852b0SQu Wenruo } 253721a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 253821a852b0SQu Wenruo + sizeof(struct btrfs_chunk)) { 253921a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too small %u < %zu", 254021a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 254121a852b0SQu Wenruo sizeof(struct btrfs_disk_key) 254221a852b0SQu Wenruo + sizeof(struct btrfs_chunk)); 254321a852b0SQu Wenruo ret = -EINVAL; 254421a852b0SQu Wenruo } 254521a852b0SQu Wenruo 254621a852b0SQu Wenruo /* 254721a852b0SQu Wenruo * The generation is a global counter, we'll trust it more than the others 254821a852b0SQu Wenruo * but it's still possible that it's the one that's wrong. 254921a852b0SQu Wenruo */ 255021a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 255121a852b0SQu Wenruo btrfs_warn(fs_info, 255221a852b0SQu Wenruo "suspicious: generation < chunk_root_generation: %llu < %llu", 255321a852b0SQu Wenruo btrfs_super_generation(sb), 255421a852b0SQu Wenruo btrfs_super_chunk_root_generation(sb)); 255521a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 255621a852b0SQu Wenruo && btrfs_super_cache_generation(sb) != (u64)-1) 255721a852b0SQu Wenruo btrfs_warn(fs_info, 255821a852b0SQu Wenruo "suspicious: generation < cache_generation: %llu < %llu", 255921a852b0SQu Wenruo btrfs_super_generation(sb), 256021a852b0SQu Wenruo btrfs_super_cache_generation(sb)); 256121a852b0SQu Wenruo 256221a852b0SQu Wenruo return ret; 256321a852b0SQu Wenruo } 256421a852b0SQu Wenruo 2565069ec957SQu Wenruo /* 2566069ec957SQu Wenruo * Validation of super block at mount time. 2567069ec957SQu Wenruo * Some checks already done early at mount time, like csum type and incompat 2568069ec957SQu Wenruo * flags will be skipped. 2569069ec957SQu Wenruo */ 2570069ec957SQu Wenruo static int btrfs_validate_mount_super(struct btrfs_fs_info *fs_info) 2571069ec957SQu Wenruo { 2572069ec957SQu Wenruo return validate_super(fs_info, fs_info->super_copy, 0); 2573069ec957SQu Wenruo } 2574069ec957SQu Wenruo 257575cb857dSQu Wenruo /* 257675cb857dSQu Wenruo * Validation of super block at write time. 257775cb857dSQu Wenruo * Some checks like bytenr check will be skipped as their values will be 257875cb857dSQu Wenruo * overwritten soon. 257975cb857dSQu Wenruo * Extra checks like csum type and incompat flags will be done here. 258075cb857dSQu Wenruo */ 258175cb857dSQu Wenruo static int btrfs_validate_write_super(struct btrfs_fs_info *fs_info, 258275cb857dSQu Wenruo struct btrfs_super_block *sb) 258375cb857dSQu Wenruo { 258475cb857dSQu Wenruo int ret; 258575cb857dSQu Wenruo 258675cb857dSQu Wenruo ret = validate_super(fs_info, sb, -1); 258775cb857dSQu Wenruo if (ret < 0) 258875cb857dSQu Wenruo goto out; 2589e7e16f48SJohannes Thumshirn if (!btrfs_supported_super_csum(btrfs_super_csum_type(sb))) { 259075cb857dSQu Wenruo ret = -EUCLEAN; 259175cb857dSQu Wenruo btrfs_err(fs_info, "invalid csum type, has %u want %u", 259275cb857dSQu Wenruo btrfs_super_csum_type(sb), BTRFS_CSUM_TYPE_CRC32); 259375cb857dSQu Wenruo goto out; 259475cb857dSQu Wenruo } 259575cb857dSQu Wenruo if (btrfs_super_incompat_flags(sb) & ~BTRFS_FEATURE_INCOMPAT_SUPP) { 259675cb857dSQu Wenruo ret = -EUCLEAN; 259775cb857dSQu Wenruo btrfs_err(fs_info, 259875cb857dSQu Wenruo "invalid incompat flags, has 0x%llx valid mask 0x%llx", 259975cb857dSQu Wenruo btrfs_super_incompat_flags(sb), 260075cb857dSQu Wenruo (unsigned long long)BTRFS_FEATURE_INCOMPAT_SUPP); 260175cb857dSQu Wenruo goto out; 260275cb857dSQu Wenruo } 260375cb857dSQu Wenruo out: 260475cb857dSQu Wenruo if (ret < 0) 260575cb857dSQu Wenruo btrfs_err(fs_info, 260675cb857dSQu Wenruo "super block corruption detected before writing it to disk"); 260775cb857dSQu Wenruo return ret; 260875cb857dSQu Wenruo } 260975cb857dSQu Wenruo 26106ef108ddSNikolay Borisov static int __cold init_tree_roots(struct btrfs_fs_info *fs_info) 2611b8522a1eSNikolay Borisov { 26126ef108ddSNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 2613b8522a1eSNikolay Borisov struct btrfs_super_block *sb = fs_info->super_copy; 2614b8522a1eSNikolay Borisov struct btrfs_root *tree_root = fs_info->tree_root; 2615b8522a1eSNikolay Borisov bool handle_error = false; 2616b8522a1eSNikolay Borisov int ret = 0; 2617b8522a1eSNikolay Borisov int i; 2618b8522a1eSNikolay Borisov 2619b8522a1eSNikolay Borisov for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 2620b8522a1eSNikolay Borisov u64 generation; 2621b8522a1eSNikolay Borisov int level; 2622b8522a1eSNikolay Borisov 2623b8522a1eSNikolay Borisov if (handle_error) { 2624b8522a1eSNikolay Borisov if (!IS_ERR(tree_root->node)) 2625b8522a1eSNikolay Borisov free_extent_buffer(tree_root->node); 2626b8522a1eSNikolay Borisov tree_root->node = NULL; 2627b8522a1eSNikolay Borisov 2628b8522a1eSNikolay Borisov if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) 2629b8522a1eSNikolay Borisov break; 2630b8522a1eSNikolay Borisov 2631b8522a1eSNikolay Borisov free_root_pointers(fs_info, 0); 2632b8522a1eSNikolay Borisov 2633b8522a1eSNikolay Borisov /* 2634b8522a1eSNikolay Borisov * Don't use the log in recovery mode, it won't be 2635b8522a1eSNikolay Borisov * valid 2636b8522a1eSNikolay Borisov */ 2637b8522a1eSNikolay Borisov btrfs_set_super_log_root(sb, 0); 2638b8522a1eSNikolay Borisov 2639b8522a1eSNikolay Borisov /* We can't trust the free space cache either */ 2640b8522a1eSNikolay Borisov btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2641b8522a1eSNikolay Borisov 2642b8522a1eSNikolay Borisov ret = read_backup_root(fs_info, i); 26436ef108ddSNikolay Borisov backup_index = ret; 2644b8522a1eSNikolay Borisov if (ret < 0) 2645b8522a1eSNikolay Borisov return ret; 2646b8522a1eSNikolay Borisov } 2647b8522a1eSNikolay Borisov generation = btrfs_super_generation(sb); 2648b8522a1eSNikolay Borisov level = btrfs_super_root_level(sb); 2649b8522a1eSNikolay Borisov tree_root->node = read_tree_block(fs_info, btrfs_super_root(sb), 2650b8522a1eSNikolay Borisov generation, level, NULL); 2651b8522a1eSNikolay Borisov if (IS_ERR(tree_root->node) || 2652b8522a1eSNikolay Borisov !extent_buffer_uptodate(tree_root->node)) { 2653b8522a1eSNikolay Borisov handle_error = true; 2654b8522a1eSNikolay Borisov 26550465337cSJosef Bacik if (IS_ERR(tree_root->node)) { 2656b8522a1eSNikolay Borisov ret = PTR_ERR(tree_root->node); 26570465337cSJosef Bacik tree_root->node = NULL; 26580465337cSJosef Bacik } else if (!extent_buffer_uptodate(tree_root->node)) { 2659b8522a1eSNikolay Borisov ret = -EUCLEAN; 26600465337cSJosef Bacik } 2661b8522a1eSNikolay Borisov 2662b8522a1eSNikolay Borisov btrfs_warn(fs_info, "failed to read tree root"); 2663b8522a1eSNikolay Borisov continue; 2664b8522a1eSNikolay Borisov } 2665b8522a1eSNikolay Borisov 2666b8522a1eSNikolay Borisov btrfs_set_root_node(&tree_root->root_item, tree_root->node); 2667b8522a1eSNikolay Borisov tree_root->commit_root = btrfs_root_node(tree_root); 2668b8522a1eSNikolay Borisov btrfs_set_root_refs(&tree_root->root_item, 1); 2669b8522a1eSNikolay Borisov 2670336a0d8dSNikolay Borisov /* 2671336a0d8dSNikolay Borisov * No need to hold btrfs_root::objectid_mutex since the fs 2672336a0d8dSNikolay Borisov * hasn't been fully initialised and we are the only user 2673336a0d8dSNikolay Borisov */ 2674b8522a1eSNikolay Borisov ret = btrfs_find_highest_objectid(tree_root, 2675b8522a1eSNikolay Borisov &tree_root->highest_objectid); 2676b8522a1eSNikolay Borisov if (ret < 0) { 2677b8522a1eSNikolay Borisov handle_error = true; 2678b8522a1eSNikolay Borisov continue; 2679b8522a1eSNikolay Borisov } 2680b8522a1eSNikolay Borisov 2681b8522a1eSNikolay Borisov ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2682b8522a1eSNikolay Borisov 2683b8522a1eSNikolay Borisov ret = btrfs_read_roots(fs_info); 2684b8522a1eSNikolay Borisov if (ret < 0) { 2685b8522a1eSNikolay Borisov handle_error = true; 2686b8522a1eSNikolay Borisov continue; 2687b8522a1eSNikolay Borisov } 2688b8522a1eSNikolay Borisov 2689b8522a1eSNikolay Borisov /* All successful */ 2690b8522a1eSNikolay Borisov fs_info->generation = generation; 2691b8522a1eSNikolay Borisov fs_info->last_trans_committed = generation; 26926ef108ddSNikolay Borisov 26936ef108ddSNikolay Borisov /* Always begin writing backup roots after the one being used */ 26946ef108ddSNikolay Borisov if (backup_index < 0) { 26956ef108ddSNikolay Borisov fs_info->backup_root_index = 0; 26966ef108ddSNikolay Borisov } else { 26976ef108ddSNikolay Borisov fs_info->backup_root_index = backup_index + 1; 26986ef108ddSNikolay Borisov fs_info->backup_root_index %= BTRFS_NUM_BACKUP_ROOTS; 26996ef108ddSNikolay Borisov } 2700b8522a1eSNikolay Borisov break; 2701b8522a1eSNikolay Borisov } 2702b8522a1eSNikolay Borisov 2703b8522a1eSNikolay Borisov return ret; 2704b8522a1eSNikolay Borisov } 2705b8522a1eSNikolay Borisov 27068260edbaSJosef Bacik void btrfs_init_fs_info(struct btrfs_fs_info *fs_info) 2707eb60ceacSChris Mason { 270876dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2709f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 27108fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2711facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 271224bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2713eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 271411833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2715eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2716a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 271776dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 271824bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 27194cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 2720ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2721f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 272247ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2723f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2724d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 272567c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 27267585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2727573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2728de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 272919c00ddcSChris Mason 27300b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 27316324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2732f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 273347ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 2734bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 2735bd647ce3SJosef Bacik INIT_LIST_HEAD(&fs_info->allocated_roots); 27363fd63727SJosef Bacik INIT_LIST_HEAD(&fs_info->allocated_ebs); 27373fd63727SJosef Bacik spin_lock_init(&fs_info->eb_leak_lock); 2738bd647ce3SJosef Bacik #endif 2739c8bf1b67SDavid Sterba extent_map_tree_init(&fs_info->mapping_tree); 274066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 274166d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 274266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 274366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 274466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 274566d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 274666d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2747ba2c4d4eSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_refs_rsv, 2748ba2c4d4eSJosef Bacik BTRFS_BLOCK_RSV_DELREFS); 2749ba2c4d4eSJosef Bacik 2750771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 27514cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 27522fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2753034f784dSJosef Bacik atomic_set(&fs_info->nr_delayed_iputs, 0); 2754fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 275595ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 27569ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 27574cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2758a5ed45f8SNikolay Borisov atomic64_set(&fs_info->free_chunk_space, 0); 2759f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 27608b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2761f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 276290519d66SArne Jansen /* readahead state */ 2763d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 276490519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2765fd708b81SJosef Bacik btrfs_init_ref_verify(fs_info); 2766c8b97818SChris Mason 2767b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2768b34b086cSChris Mason num_online_cpus() + 2, 8); 27690afbaf8cSChris Mason 2770199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2771199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 277269fe2d75SJosef Bacik 2773638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 277421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 277521adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 277621adbd5cSStefan Behrens #endif 2777779a65a4SEric Sandeen btrfs_init_balance(fs_info); 277821c7e756SMiao Xie btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); 2779a2de733cSArne Jansen 27800f9dd46cSJosef Bacik spin_lock_init(&fs_info->block_group_cache_lock); 27816bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2782a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 27830f9dd46cSJosef Bacik 2784fe119a6eSNikolay Borisov extent_io_tree_init(fs_info, &fs_info->excluded_extents, 2785fe119a6eSNikolay Borisov IO_TREE_FS_EXCLUDED_EXTENTS, NULL); 2786afcdd129SJosef Bacik set_bit(BTRFS_FS_BARRIER, &fs_info->flags); 278739279cc3SChris Mason 27885a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 2789e02119d5SChris Mason mutex_init(&fs_info->tree_log_mutex); 2790925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2791a74a4b97SChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2792a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 27931bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 27949e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2795c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 279676dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2797803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2798fa9c0d79SChris Mason 2799ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2800f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2801b0643e59SDennis Zhou btrfs_discard_init(fs_info); 2802416ac51dSArne Jansen 2803fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2804fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2805fa9c0d79SChris Mason 2806e6dcd2dcSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 2807f9295749SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2808bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 28094854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 2810034f784dSJosef Bacik init_waitqueue_head(&fs_info->delayed_iputs_wait); 28113768f368SChris Mason 2812da17066cSJeff Mahoney /* Usable values until the real ones are cached from the superblock */ 2813da17066cSJeff Mahoney fs_info->nodesize = 4096; 2814da17066cSJeff Mahoney fs_info->sectorsize = 4096; 2815da17066cSJeff Mahoney fs_info->stripesize = 4096; 2816da17066cSJeff Mahoney 2817eede2bf3SOmar Sandoval spin_lock_init(&fs_info->swapfile_pins_lock); 2818eede2bf3SOmar Sandoval fs_info->swapfile_pins = RB_ROOT; 2819eede2bf3SOmar Sandoval 28209e967495SFilipe Manana fs_info->send_in_progress = 0; 28218260edbaSJosef Bacik } 28228260edbaSJosef Bacik 28238260edbaSJosef Bacik static int init_mount_fs_info(struct btrfs_fs_info *fs_info, struct super_block *sb) 28248260edbaSJosef Bacik { 28258260edbaSJosef Bacik int ret; 28268260edbaSJosef Bacik 28278260edbaSJosef Bacik fs_info->sb = sb; 28288260edbaSJosef Bacik sb->s_blocksize = BTRFS_BDEV_BLOCKSIZE; 28298260edbaSJosef Bacik sb->s_blocksize_bits = blksize_bits(BTRFS_BDEV_BLOCKSIZE); 28309e967495SFilipe Manana 2831c75e8394SJosef Bacik ret = percpu_counter_init(&fs_info->dio_bytes, 0, GFP_KERNEL); 2832ae18c37aSJosef Bacik if (ret) 2833ae18c37aSJosef Bacik return ret; 2834ae18c37aSJosef Bacik 2835ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 2836ae18c37aSJosef Bacik if (ret) 2837c75e8394SJosef Bacik return ret; 2838ae18c37aSJosef Bacik 2839ae18c37aSJosef Bacik fs_info->dirty_metadata_batch = PAGE_SIZE * 2840ae18c37aSJosef Bacik (1 + ilog2(nr_cpu_ids)); 2841ae18c37aSJosef Bacik 2842ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2843ae18c37aSJosef Bacik if (ret) 2844c75e8394SJosef Bacik return ret; 2845ae18c37aSJosef Bacik 2846ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->dev_replace.bio_counter, 0, 2847ae18c37aSJosef Bacik GFP_KERNEL); 2848ae18c37aSJosef Bacik if (ret) 2849c75e8394SJosef Bacik return ret; 2850ae18c37aSJosef Bacik 2851ae18c37aSJosef Bacik fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 2852ae18c37aSJosef Bacik GFP_KERNEL); 2853c75e8394SJosef Bacik if (!fs_info->delayed_root) 2854c75e8394SJosef Bacik return -ENOMEM; 2855ae18c37aSJosef Bacik btrfs_init_delayed_root(fs_info->delayed_root); 2856ae18c37aSJosef Bacik 2857c75e8394SJosef Bacik return btrfs_alloc_stripe_hash_table(fs_info); 2858ae18c37aSJosef Bacik } 2859ae18c37aSJosef Bacik 286097f4dd09SNikolay Borisov static int btrfs_uuid_rescan_kthread(void *data) 286197f4dd09SNikolay Borisov { 286297f4dd09SNikolay Borisov struct btrfs_fs_info *fs_info = (struct btrfs_fs_info *)data; 286397f4dd09SNikolay Borisov int ret; 286497f4dd09SNikolay Borisov 286597f4dd09SNikolay Borisov /* 286697f4dd09SNikolay Borisov * 1st step is to iterate through the existing UUID tree and 286797f4dd09SNikolay Borisov * to delete all entries that contain outdated data. 286897f4dd09SNikolay Borisov * 2nd step is to add all missing entries to the UUID tree. 286997f4dd09SNikolay Borisov */ 287097f4dd09SNikolay Borisov ret = btrfs_uuid_tree_iterate(fs_info); 287197f4dd09SNikolay Borisov if (ret < 0) { 2872c94bec2cSJosef Bacik if (ret != -EINTR) 2873c94bec2cSJosef Bacik btrfs_warn(fs_info, "iterating uuid_tree failed %d", 2874c94bec2cSJosef Bacik ret); 287597f4dd09SNikolay Borisov up(&fs_info->uuid_tree_rescan_sem); 287697f4dd09SNikolay Borisov return ret; 287797f4dd09SNikolay Borisov } 287897f4dd09SNikolay Borisov return btrfs_uuid_scan_kthread(data); 287997f4dd09SNikolay Borisov } 288097f4dd09SNikolay Borisov 288197f4dd09SNikolay Borisov static int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info) 288297f4dd09SNikolay Borisov { 288397f4dd09SNikolay Borisov struct task_struct *task; 288497f4dd09SNikolay Borisov 288597f4dd09SNikolay Borisov down(&fs_info->uuid_tree_rescan_sem); 288697f4dd09SNikolay Borisov task = kthread_run(btrfs_uuid_rescan_kthread, fs_info, "btrfs-uuid"); 288797f4dd09SNikolay Borisov if (IS_ERR(task)) { 288897f4dd09SNikolay Borisov /* fs_info->update_uuid_tree_gen remains 0 in all error case */ 288997f4dd09SNikolay Borisov btrfs_warn(fs_info, "failed to start uuid_rescan task"); 289097f4dd09SNikolay Borisov up(&fs_info->uuid_tree_rescan_sem); 289197f4dd09SNikolay Borisov return PTR_ERR(task); 289297f4dd09SNikolay Borisov } 289397f4dd09SNikolay Borisov 289497f4dd09SNikolay Borisov return 0; 289597f4dd09SNikolay Borisov } 289697f4dd09SNikolay Borisov 2897ae18c37aSJosef Bacik int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices, 2898ae18c37aSJosef Bacik char *options) 2899ae18c37aSJosef Bacik { 2900ae18c37aSJosef Bacik u32 sectorsize; 2901ae18c37aSJosef Bacik u32 nodesize; 2902ae18c37aSJosef Bacik u32 stripesize; 2903ae18c37aSJosef Bacik u64 generation; 2904ae18c37aSJosef Bacik u64 features; 2905ae18c37aSJosef Bacik u16 csum_type; 2906ae18c37aSJosef Bacik struct btrfs_super_block *disk_super; 2907ae18c37aSJosef Bacik struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2908ae18c37aSJosef Bacik struct btrfs_root *tree_root; 2909ae18c37aSJosef Bacik struct btrfs_root *chunk_root; 2910ae18c37aSJosef Bacik int ret; 2911ae18c37aSJosef Bacik int err = -EINVAL; 2912ae18c37aSJosef Bacik int clear_free_space_tree = 0; 2913ae18c37aSJosef Bacik int level; 2914ae18c37aSJosef Bacik 29158260edbaSJosef Bacik ret = init_mount_fs_info(fs_info, sb); 291653b381b3SDavid Woodhouse if (ret) { 291783c8266aSDavid Sterba err = ret; 2918ae18c37aSJosef Bacik goto fail; 291953b381b3SDavid Woodhouse } 292053b381b3SDavid Woodhouse 2921ae18c37aSJosef Bacik /* These need to be init'ed before we start creating inodes and such. */ 2922ae18c37aSJosef Bacik tree_root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, 2923ae18c37aSJosef Bacik GFP_KERNEL); 2924ae18c37aSJosef Bacik fs_info->tree_root = tree_root; 2925ae18c37aSJosef Bacik chunk_root = btrfs_alloc_root(fs_info, BTRFS_CHUNK_TREE_OBJECTID, 2926ae18c37aSJosef Bacik GFP_KERNEL); 2927ae18c37aSJosef Bacik fs_info->chunk_root = chunk_root; 2928ae18c37aSJosef Bacik if (!tree_root || !chunk_root) { 2929ae18c37aSJosef Bacik err = -ENOMEM; 2930c75e8394SJosef Bacik goto fail; 2931ae18c37aSJosef Bacik } 2932ae18c37aSJosef Bacik 2933ae18c37aSJosef Bacik fs_info->btree_inode = new_inode(sb); 2934ae18c37aSJosef Bacik if (!fs_info->btree_inode) { 2935ae18c37aSJosef Bacik err = -ENOMEM; 2936c75e8394SJosef Bacik goto fail; 2937ae18c37aSJosef Bacik } 2938ae18c37aSJosef Bacik mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 2939ae18c37aSJosef Bacik btrfs_init_btree_inode(fs_info); 2940ae18c37aSJosef Bacik 29413c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 29421104a885SDavid Sterba 29431104a885SDavid Sterba /* 29441104a885SDavid Sterba * Read super block and check the signature bytes only 29451104a885SDavid Sterba */ 29468f32380dSJohannes Thumshirn disk_super = btrfs_read_dev_super(fs_devices->latest_bdev); 29478f32380dSJohannes Thumshirn if (IS_ERR(disk_super)) { 29488f32380dSJohannes Thumshirn err = PTR_ERR(disk_super); 294916cdcec7SMiao Xie goto fail_alloc; 295020b45077SDave Young } 295139279cc3SChris Mason 29521104a885SDavid Sterba /* 29538dc3f22cSJohannes Thumshirn * Verify the type first, if that or the the checksum value are 29548dc3f22cSJohannes Thumshirn * corrupted, we'll find out 29558dc3f22cSJohannes Thumshirn */ 29568f32380dSJohannes Thumshirn csum_type = btrfs_super_csum_type(disk_super); 295751bce6c9SJohannes Thumshirn if (!btrfs_supported_super_csum(csum_type)) { 29588dc3f22cSJohannes Thumshirn btrfs_err(fs_info, "unsupported checksum algorithm: %u", 295951bce6c9SJohannes Thumshirn csum_type); 29608dc3f22cSJohannes Thumshirn err = -EINVAL; 29618f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29628dc3f22cSJohannes Thumshirn goto fail_alloc; 29638dc3f22cSJohannes Thumshirn } 29648dc3f22cSJohannes Thumshirn 29656d97c6e3SJohannes Thumshirn ret = btrfs_init_csum_hash(fs_info, csum_type); 29666d97c6e3SJohannes Thumshirn if (ret) { 29676d97c6e3SJohannes Thumshirn err = ret; 29688f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29696d97c6e3SJohannes Thumshirn goto fail_alloc; 29706d97c6e3SJohannes Thumshirn } 29716d97c6e3SJohannes Thumshirn 29728dc3f22cSJohannes Thumshirn /* 29731104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 29741104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 29751104a885SDavid Sterba */ 29768f32380dSJohannes Thumshirn if (btrfs_check_super_csum(fs_info, (u8 *)disk_super)) { 297705135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 29781104a885SDavid Sterba err = -EINVAL; 29798f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 2980141386e1SJosef Bacik goto fail_alloc; 29811104a885SDavid Sterba } 29821104a885SDavid Sterba 29831104a885SDavid Sterba /* 29841104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 29851104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 29861104a885SDavid Sterba * the whole block of INFO_SIZE 29871104a885SDavid Sterba */ 29888f32380dSJohannes Thumshirn memcpy(fs_info->super_copy, disk_super, sizeof(*fs_info->super_copy)); 29898f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29905f39d397SChris Mason 2991fbc6feaeSNikolay Borisov disk_super = fs_info->super_copy; 2992fbc6feaeSNikolay Borisov 2993de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->fsid, fs_info->super_copy->fsid, 2994de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 2995de37aa51SNikolay Borisov 29967239ff4bSNikolay Borisov if (btrfs_fs_incompat(fs_info, METADATA_UUID)) { 2997de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->metadata_uuid, 2998de37aa51SNikolay Borisov fs_info->super_copy->metadata_uuid, 2999de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 30007239ff4bSNikolay Borisov } 30010b86a832SChris Mason 3002fbc6feaeSNikolay Borisov features = btrfs_super_flags(disk_super); 3003fbc6feaeSNikolay Borisov if (features & BTRFS_SUPER_FLAG_CHANGING_FSID_V2) { 3004fbc6feaeSNikolay Borisov features &= ~BTRFS_SUPER_FLAG_CHANGING_FSID_V2; 3005fbc6feaeSNikolay Borisov btrfs_set_super_flags(disk_super, features); 3006fbc6feaeSNikolay Borisov btrfs_info(fs_info, 3007fbc6feaeSNikolay Borisov "found metadata UUID change in progress flag, clearing"); 3008fbc6feaeSNikolay Borisov } 3009fbc6feaeSNikolay Borisov 3010fbc6feaeSNikolay Borisov memcpy(fs_info->super_for_commit, fs_info->super_copy, 3011fbc6feaeSNikolay Borisov sizeof(*fs_info->super_for_commit)); 3012de37aa51SNikolay Borisov 3013069ec957SQu Wenruo ret = btrfs_validate_mount_super(fs_info); 30141104a885SDavid Sterba if (ret) { 301505135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 30161104a885SDavid Sterba err = -EINVAL; 3017141386e1SJosef Bacik goto fail_alloc; 30181104a885SDavid Sterba } 30191104a885SDavid Sterba 30200f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 3021141386e1SJosef Bacik goto fail_alloc; 30220f7d52f4SChris Mason 3023acce952bSliubo /* check FS state, whether FS is broken. */ 302487533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 302587533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 3026acce952bSliubo 302775e7cb7fSLiu Bo /* 302875e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 302975e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 303075e7cb7fSLiu Bo */ 303175e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 303275e7cb7fSLiu Bo 30332ff7e61eSJeff Mahoney ret = btrfs_parse_options(fs_info, options, sb->s_flags); 30342b82032cSYan Zheng if (ret) { 30352b82032cSYan Zheng err = ret; 3036141386e1SJosef Bacik goto fail_alloc; 30372b82032cSYan Zheng } 3038dfe25020SChris Mason 3039f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 3040f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 3041f2b636e8SJosef Bacik if (features) { 304205135f59SDavid Sterba btrfs_err(fs_info, 304305135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 3044c1c9ff7cSGeert Uytterhoeven features); 3045f2b636e8SJosef Bacik err = -EINVAL; 3046141386e1SJosef Bacik goto fail_alloc; 3047f2b636e8SJosef Bacik } 3048f2b636e8SJosef Bacik 30495d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 30505d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 30510b246afaSJeff Mahoney if (fs_info->compress_type == BTRFS_COMPRESS_LZO) 3052a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 30535c1aab1dSNick Terrell else if (fs_info->compress_type == BTRFS_COMPRESS_ZSTD) 30545c1aab1dSNick Terrell features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD; 3055727011e0SChris Mason 30563173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 305705135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 30583173a18fSJosef Bacik 3059727011e0SChris Mason /* 3060727011e0SChris Mason * flag our filesystem as having big metadata blocks if 3061727011e0SChris Mason * they are bigger than the page size 3062727011e0SChris Mason */ 306309cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 3064727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 306505135f59SDavid Sterba btrfs_info(fs_info, 306605135f59SDavid Sterba "flagging fs with big metadata feature"); 3067727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 3068727011e0SChris Mason } 3069727011e0SChris Mason 3070bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 3071bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 3072b7f67055SChandan Rajendra stripesize = sectorsize; 3073707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 3074963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 3075bc3f116fSChris Mason 3076da17066cSJeff Mahoney /* Cache block sizes */ 3077da17066cSJeff Mahoney fs_info->nodesize = nodesize; 3078da17066cSJeff Mahoney fs_info->sectorsize = sectorsize; 3079da17066cSJeff Mahoney fs_info->stripesize = stripesize; 3080da17066cSJeff Mahoney 3081bc3f116fSChris Mason /* 3082bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 3083bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 3084bc3f116fSChris Mason */ 3085bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 3086707e8a07SDavid Sterba (sectorsize != nodesize)) { 308705135f59SDavid Sterba btrfs_err(fs_info, 308805135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 308905135f59SDavid Sterba nodesize, sectorsize); 3090141386e1SJosef Bacik goto fail_alloc; 3091bc3f116fSChris Mason } 3092bc3f116fSChris Mason 3093ceda0864SMiao Xie /* 3094ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 3095ceda0864SMiao Xie * update the flag. 3096ceda0864SMiao Xie */ 30975d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 30985d4f98a2SYan Zheng 3099f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 3100f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 3101bc98a42cSDavid Howells if (!sb_rdonly(sb) && features) { 310205135f59SDavid Sterba btrfs_err(fs_info, 310305135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 3104c1c9ff7cSGeert Uytterhoeven features); 3105f2b636e8SJosef Bacik err = -EINVAL; 3106141386e1SJosef Bacik goto fail_alloc; 3107f2b636e8SJosef Bacik } 310861d92c32SChris Mason 31092a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 31102a458198SEric Sandeen if (ret) { 31112a458198SEric Sandeen err = ret; 31120dc3b84aSJosef Bacik goto fail_sb_buffer; 31130dc3b84aSJosef Bacik } 31144543df7eSChris Mason 31159e11ceeeSJan Kara sb->s_bdi->congested_fn = btrfs_congested_fn; 31169e11ceeeSJan Kara sb->s_bdi->congested_data = fs_info; 31179e11ceeeSJan Kara sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 3118b5420237SNikolay Borisov sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; 31199e11ceeeSJan Kara sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); 31209e11ceeeSJan Kara sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); 31214575c9ccSChris Mason 3122a061fc8dSChris Mason sb->s_blocksize = sectorsize; 3123a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 3124de37aa51SNikolay Borisov memcpy(&sb->s_uuid, fs_info->fs_devices->fsid, BTRFS_FSID_SIZE); 3125db94535dSChris Mason 3126925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 31276bccf3abSJeff Mahoney ret = btrfs_read_sys_array(fs_info); 3128925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 312984eed90fSChris Mason if (ret) { 313005135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 31315d4f98a2SYan Zheng goto fail_sb_buffer; 313284eed90fSChris Mason } 31330b86a832SChris Mason 313484234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 3135581c1760SQu Wenruo level = btrfs_super_chunk_root_level(disk_super); 31360b86a832SChris Mason 31372ff7e61eSJeff Mahoney chunk_root->node = read_tree_block(fs_info, 31380b86a832SChris Mason btrfs_super_chunk_root(disk_super), 3139581c1760SQu Wenruo generation, level, NULL); 314064c043deSLiu Bo if (IS_ERR(chunk_root->node) || 314164c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 314205135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 3143e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 3144e5fffbacSchandan free_extent_buffer(chunk_root->node); 314595ab1f64SZhao Lei chunk_root->node = NULL; 3146af31f5e5SChris Mason goto fail_tree_roots; 314783121942SDavid Woodhouse } 31485d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 31495d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 31500b86a832SChris Mason 3151e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 3152c4ac7541SDavid Sterba offsetof(struct btrfs_header, chunk_tree_uuid), 3153c4ac7541SDavid Sterba BTRFS_UUID_SIZE); 3154e17cade2SChris Mason 31555b4aacefSJeff Mahoney ret = btrfs_read_chunk_tree(fs_info); 31562b82032cSYan Zheng if (ret) { 315705135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 3158af31f5e5SChris Mason goto fail_tree_roots; 31592b82032cSYan Zheng } 31600b86a832SChris Mason 31618dabb742SStefan Behrens /* 31629b99b115SAnand Jain * Keep the devid that is marked to be the target device for the 31639b99b115SAnand Jain * device replace procedure 31648dabb742SStefan Behrens */ 31659b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 0); 3166dfe25020SChris Mason 3167a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 316805135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 3169a6b0d5c8SChris Mason goto fail_tree_roots; 3170a6b0d5c8SChris Mason } 3171a6b0d5c8SChris Mason 3172b8522a1eSNikolay Borisov ret = init_tree_roots(fs_info); 31734bbcaa64SEric Sandeen if (ret) 3174b8522a1eSNikolay Borisov goto fail_tree_roots; 31758929ecfaSYan, Zheng 317675ec1db8SJosef Bacik /* 317775ec1db8SJosef Bacik * If we have a uuid root and we're not being told to rescan we need to 317875ec1db8SJosef Bacik * check the generation here so we can set the 317975ec1db8SJosef Bacik * BTRFS_FS_UPDATE_UUID_TREE_GEN bit. Otherwise we could commit the 318075ec1db8SJosef Bacik * transaction during a balance or the log replay without updating the 318175ec1db8SJosef Bacik * uuid generation, and then if we crash we would rescan the uuid tree, 318275ec1db8SJosef Bacik * even though it was perfectly fine. 318375ec1db8SJosef Bacik */ 318475ec1db8SJosef Bacik if (fs_info->uuid_root && !btrfs_test_opt(fs_info, RESCAN_UUID_TREE) && 318575ec1db8SJosef Bacik fs_info->generation == btrfs_super_uuid_tree_generation(disk_super)) 318675ec1db8SJosef Bacik set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); 318775ec1db8SJosef Bacik 3188cf90d884SQu Wenruo ret = btrfs_verify_dev_extents(fs_info); 3189cf90d884SQu Wenruo if (ret) { 3190cf90d884SQu Wenruo btrfs_err(fs_info, 3191cf90d884SQu Wenruo "failed to verify dev extents against chunks: %d", 3192cf90d884SQu Wenruo ret); 3193cf90d884SQu Wenruo goto fail_block_groups; 3194cf90d884SQu Wenruo } 319568310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 319668310a5eSIlya Dryomov if (ret) { 319705135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 319868310a5eSIlya Dryomov goto fail_block_groups; 319968310a5eSIlya Dryomov } 320068310a5eSIlya Dryomov 3201733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 3202733f4fbbSStefan Behrens if (ret) { 320305135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 3204733f4fbbSStefan Behrens goto fail_block_groups; 3205733f4fbbSStefan Behrens } 3206733f4fbbSStefan Behrens 32078dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 32088dabb742SStefan Behrens if (ret) { 320905135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 32108dabb742SStefan Behrens goto fail_block_groups; 32118dabb742SStefan Behrens } 32128dabb742SStefan Behrens 32139b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 1); 32148dabb742SStefan Behrens 3215c6761a9eSAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices); 3216b7c35e81SAnand Jain if (ret) { 321705135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 321805135f59SDavid Sterba ret); 3219b7c35e81SAnand Jain goto fail_block_groups; 3220b7c35e81SAnand Jain } 3221b7c35e81SAnand Jain 322296f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 32235ac1d209SJeff Mahoney if (ret) { 322405135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 3225b7c35e81SAnand Jain goto fail_fsdev_sysfs; 32265ac1d209SJeff Mahoney } 32275ac1d209SJeff Mahoney 3228c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 3229c59021f8Sliubo if (ret) { 323005135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 32312365dd3cSAnand Jain goto fail_sysfs; 3232c59021f8Sliubo } 3233c59021f8Sliubo 32345b4aacefSJeff Mahoney ret = btrfs_read_block_groups(fs_info); 32351b1d1f66SJosef Bacik if (ret) { 323605135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 32372365dd3cSAnand Jain goto fail_sysfs; 32381b1d1f66SJosef Bacik } 32394330e183SQu Wenruo 32406528b99dSAnand Jain if (!sb_rdonly(sb) && !btrfs_check_rw_degradable(fs_info, NULL)) { 324105135f59SDavid Sterba btrfs_warn(fs_info, 324252042d8eSAndrea Gelmini "writable mount is not allowed due to too many missing devices"); 32432365dd3cSAnand Jain goto fail_sysfs; 3244292fd7fcSStefan Behrens } 32459078a3e1SChris Mason 3246a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3247a74a4b97SChris Mason "btrfs-cleaner"); 324857506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 32492365dd3cSAnand Jain goto fail_sysfs; 3250a74a4b97SChris Mason 3251a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3252a74a4b97SChris Mason tree_root, 3253a74a4b97SChris Mason "btrfs-transaction"); 325457506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 32553f157a2fSChris Mason goto fail_cleaner; 3256a74a4b97SChris Mason 3257583b7231SHans van Kranenburg if (!btrfs_test_opt(fs_info, NOSSD) && 3258c289811cSChris Mason !fs_info->fs_devices->rotating) { 3259583b7231SHans van Kranenburg btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations"); 3260c289811cSChris Mason } 3261c289811cSChris Mason 3262572d9ab7SDavid Sterba /* 326301327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3264572d9ab7SDavid Sterba * not have to wait for transaction commit 3265572d9ab7SDavid Sterba */ 3266572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 32673818aea2SQu Wenruo 326821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 32690b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) { 32702ff7e61eSJeff Mahoney ret = btrfsic_mount(fs_info, fs_devices, 32710b246afaSJeff Mahoney btrfs_test_opt(fs_info, 327221adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 327321adbd5cSStefan Behrens 1 : 0, 327421adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 327521adbd5cSStefan Behrens if (ret) 327605135f59SDavid Sterba btrfs_warn(fs_info, 327705135f59SDavid Sterba "failed to initialize integrity check module: %d", 327805135f59SDavid Sterba ret); 327921adbd5cSStefan Behrens } 328021adbd5cSStefan Behrens #endif 3281bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3282bcef60f2SArne Jansen if (ret) 3283bcef60f2SArne Jansen goto fail_trans_kthread; 328421adbd5cSStefan Behrens 3285fd708b81SJosef Bacik if (btrfs_build_ref_tree(fs_info)) 3286fd708b81SJosef Bacik btrfs_err(fs_info, "couldn't build ref tree"); 3287fd708b81SJosef Bacik 328896da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 328996da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 32900b246afaSJeff Mahoney !btrfs_test_opt(fs_info, NOLOGREPLAY)) { 3291e8294f2fSDavid Sterba btrfs_info(fs_info, "start tree-log replay"); 329263443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 329379787eaaSJeff Mahoney if (ret) { 329463443bf5SEric Sandeen err = ret; 329528c16cbbSWang Shilong goto fail_qgroup; 3296e556ce2cSYan Zheng } 3297e02119d5SChris Mason } 32981a40e23bSZheng Yan 32996bccf3abSJeff Mahoney ret = btrfs_find_orphan_roots(fs_info); 330079787eaaSJeff Mahoney if (ret) 330128c16cbbSWang Shilong goto fail_qgroup; 330276dda93cSYan, Zheng 3303bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3304d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 330544c44af2SIlya Dryomov if (ret) 330628c16cbbSWang Shilong goto fail_qgroup; 330790c711abSZygo Blaxell 330890c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 33095d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 331090c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3311d7ce5843SMiao Xie if (ret < 0) { 331205135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 331305135f59SDavid Sterba ret); 3314d7ce5843SMiao Xie err = -EINVAL; 3315bcef60f2SArne Jansen goto fail_qgroup; 3316d7ce5843SMiao Xie } 33177c2ca468SChris Mason } 33181a40e23bSZheng Yan 331956e9357aSDavid Sterba fs_info->fs_root = btrfs_get_fs_root(fs_info, BTRFS_FS_TREE_OBJECTID, true); 33203140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 33213140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3322f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read fs tree: %d", err); 3323315bf8efSJosef Bacik fs_info->fs_root = NULL; 3324bcef60f2SArne Jansen goto fail_qgroup; 33253140c9a3SDan Carpenter } 3326c289811cSChris Mason 3327bc98a42cSDavid Howells if (sb_rdonly(sb)) 33282b6ba629SIlya Dryomov return 0; 33292b6ba629SIlya Dryomov 3330f8d468a1SOmar Sandoval if (btrfs_test_opt(fs_info, CLEAR_CACHE) && 3331f8d468a1SOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 33326675df31SOmar Sandoval clear_free_space_tree = 1; 33336675df31SOmar Sandoval } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && 33346675df31SOmar Sandoval !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) { 33356675df31SOmar Sandoval btrfs_warn(fs_info, "free space tree is invalid"); 33366675df31SOmar Sandoval clear_free_space_tree = 1; 33376675df31SOmar Sandoval } 33386675df31SOmar Sandoval 33396675df31SOmar Sandoval if (clear_free_space_tree) { 3340f8d468a1SOmar Sandoval btrfs_info(fs_info, "clearing free space tree"); 3341f8d468a1SOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 3342f8d468a1SOmar Sandoval if (ret) { 3343f8d468a1SOmar Sandoval btrfs_warn(fs_info, 3344f8d468a1SOmar Sandoval "failed to clear free space tree: %d", ret); 33456bccf3abSJeff Mahoney close_ctree(fs_info); 3346f8d468a1SOmar Sandoval return ret; 3347f8d468a1SOmar Sandoval } 3348f8d468a1SOmar Sandoval } 3349f8d468a1SOmar Sandoval 33500b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) && 3351511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 335205135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3353511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3354511711afSChris Mason if (ret) { 335505135f59SDavid Sterba btrfs_warn(fs_info, 335605135f59SDavid Sterba "failed to create free space tree: %d", ret); 33576bccf3abSJeff Mahoney close_ctree(fs_info); 3358511711afSChris Mason return ret; 3359511711afSChris Mason } 3360511711afSChris Mason } 3361511711afSChris Mason 3362e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 33632b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 33642b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 33652b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 33666bccf3abSJeff Mahoney close_ctree(fs_info); 33672b6ba629SIlya Dryomov return ret; 33682b6ba629SIlya Dryomov } 3369e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 337059641015SIlya Dryomov 33712b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 33722b6ba629SIlya Dryomov if (ret) { 337305135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 33746bccf3abSJeff Mahoney close_ctree(fs_info); 33752b6ba629SIlya Dryomov return ret; 3376e3acc2a6SJosef Bacik } 3377e3acc2a6SJosef Bacik 33788dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 33798dabb742SStefan Behrens if (ret) { 338005135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 33816bccf3abSJeff Mahoney close_ctree(fs_info); 33828dabb742SStefan Behrens return ret; 33838dabb742SStefan Behrens } 33848dabb742SStefan Behrens 3385b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3386b0643e59SDennis Zhou btrfs_discard_resume(fs_info); 3387b382a324SJan Schmidt 33884bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 338905135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3390f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3391f7a81ea4SStefan Behrens if (ret) { 339205135f59SDavid Sterba btrfs_warn(fs_info, 339305135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 33946bccf3abSJeff Mahoney close_ctree(fs_info); 3395f7a81ea4SStefan Behrens return ret; 3396f7a81ea4SStefan Behrens } 33970b246afaSJeff Mahoney } else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || 33984bbcaa64SEric Sandeen fs_info->generation != 33994bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 340005135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 340170f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 340270f80175SStefan Behrens if (ret) { 340305135f59SDavid Sterba btrfs_warn(fs_info, 340405135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 34056bccf3abSJeff Mahoney close_ctree(fs_info); 340670f80175SStefan Behrens return ret; 340770f80175SStefan Behrens } 3408f7a81ea4SStefan Behrens } 3409afcdd129SJosef Bacik set_bit(BTRFS_FS_OPEN, &fs_info->flags); 341047ab2a6cSJosef Bacik 34118dcddfa0SQu Wenruo /* 34128dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 34138dcddfa0SQu Wenruo * no need to keep the flag 34148dcddfa0SQu Wenruo */ 34158dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 34168dcddfa0SQu Wenruo 3417ad2b2c80SAl Viro return 0; 341839279cc3SChris Mason 3419bcef60f2SArne Jansen fail_qgroup: 3420bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 34217c2ca468SChris Mason fail_trans_kthread: 34227c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 34232ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 3424faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 34253f157a2fSChris Mason fail_cleaner: 3426a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 34277c2ca468SChris Mason 34287c2ca468SChris Mason /* 34297c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 34307c2ca468SChris Mason * kthreads 34317c2ca468SChris Mason */ 34327c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 34337c2ca468SChris Mason 34342365dd3cSAnand Jain fail_sysfs: 34356618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 34362365dd3cSAnand Jain 3437b7c35e81SAnand Jain fail_fsdev_sysfs: 3438b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3439b7c35e81SAnand Jain 34401b1d1f66SJosef Bacik fail_block_groups: 344154067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 3442af31f5e5SChris Mason 3443af31f5e5SChris Mason fail_tree_roots: 34444273eaffSAnand Jain free_root_pointers(fs_info, true); 34452b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3446af31f5e5SChris Mason 344739279cc3SChris Mason fail_sb_buffer: 34487abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 34495cdd7db6SFilipe Manana btrfs_free_block_groups(fs_info); 345016cdcec7SMiao Xie fail_alloc: 3451586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3452586e46e2SIlya Dryomov 34534543df7eSChris Mason iput(fs_info->btree_inode); 34547e662854SQinghuang Feng fail: 3455586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3456ad2b2c80SAl Viro return err; 3457eb60ceacSChris Mason } 3458663faf9fSMasami Hiramatsu ALLOW_ERROR_INJECTION(open_ctree, ERRNO); 3459eb60ceacSChris Mason 3460314b6dd0SJohannes Thumshirn static void btrfs_end_super_write(struct bio *bio) 3461f2984462SChris Mason { 3462314b6dd0SJohannes Thumshirn struct btrfs_device *device = bio->bi_private; 3463314b6dd0SJohannes Thumshirn struct bio_vec *bvec; 3464314b6dd0SJohannes Thumshirn struct bvec_iter_all iter_all; 3465314b6dd0SJohannes Thumshirn struct page *page; 3466442a4f63SStefan Behrens 3467314b6dd0SJohannes Thumshirn bio_for_each_segment_all(bvec, bio, iter_all) { 3468314b6dd0SJohannes Thumshirn page = bvec->bv_page; 3469314b6dd0SJohannes Thumshirn 3470314b6dd0SJohannes Thumshirn if (bio->bi_status) { 3471fb456252SJeff Mahoney btrfs_warn_rl_in_rcu(device->fs_info, 3472314b6dd0SJohannes Thumshirn "lost page write due to IO error on %s (%d)", 3473314b6dd0SJohannes Thumshirn rcu_str_deref(device->name), 3474314b6dd0SJohannes Thumshirn blk_status_to_errno(bio->bi_status)); 3475314b6dd0SJohannes Thumshirn ClearPageUptodate(page); 3476314b6dd0SJohannes Thumshirn SetPageError(page); 3477314b6dd0SJohannes Thumshirn btrfs_dev_stat_inc_and_print(device, 3478314b6dd0SJohannes Thumshirn BTRFS_DEV_STAT_WRITE_ERRS); 3479314b6dd0SJohannes Thumshirn } else { 3480314b6dd0SJohannes Thumshirn SetPageUptodate(page); 3481f2984462SChris Mason } 3482314b6dd0SJohannes Thumshirn 3483314b6dd0SJohannes Thumshirn put_page(page); 3484314b6dd0SJohannes Thumshirn unlock_page(page); 3485314b6dd0SJohannes Thumshirn } 3486314b6dd0SJohannes Thumshirn 3487314b6dd0SJohannes Thumshirn bio_put(bio); 3488f2984462SChris Mason } 3489f2984462SChris Mason 34908f32380dSJohannes Thumshirn struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, 34918f32380dSJohannes Thumshirn int copy_num) 349229c36d72SAnand Jain { 349329c36d72SAnand Jain struct btrfs_super_block *super; 34948f32380dSJohannes Thumshirn struct page *page; 349529c36d72SAnand Jain u64 bytenr; 34968f32380dSJohannes Thumshirn struct address_space *mapping = bdev->bd_inode->i_mapping; 349729c36d72SAnand Jain 349829c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 349929c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 35008f32380dSJohannes Thumshirn return ERR_PTR(-EINVAL); 350129c36d72SAnand Jain 35028f32380dSJohannes Thumshirn page = read_cache_page_gfp(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS); 35038f32380dSJohannes Thumshirn if (IS_ERR(page)) 35048f32380dSJohannes Thumshirn return ERR_CAST(page); 350529c36d72SAnand Jain 35068f32380dSJohannes Thumshirn super = page_address(page); 350729c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 350829c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 35098f32380dSJohannes Thumshirn btrfs_release_disk_super(super); 35108f32380dSJohannes Thumshirn return ERR_PTR(-EINVAL); 351129c36d72SAnand Jain } 351229c36d72SAnand Jain 35138f32380dSJohannes Thumshirn return super; 351429c36d72SAnand Jain } 351529c36d72SAnand Jain 351629c36d72SAnand Jain 35178f32380dSJohannes Thumshirn struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev) 3518a512bbf8SYan Zheng { 35198f32380dSJohannes Thumshirn struct btrfs_super_block *super, *latest = NULL; 3520a512bbf8SYan Zheng int i; 3521a512bbf8SYan Zheng u64 transid = 0; 3522a512bbf8SYan Zheng 3523a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3524a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3525a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3526a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3527a512bbf8SYan Zheng */ 3528a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 35298f32380dSJohannes Thumshirn super = btrfs_read_dev_one_super(bdev, i); 35308f32380dSJohannes Thumshirn if (IS_ERR(super)) 3531a512bbf8SYan Zheng continue; 3532a512bbf8SYan Zheng 3533a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 35348f32380dSJohannes Thumshirn if (latest) 35358f32380dSJohannes Thumshirn btrfs_release_disk_super(super); 35368f32380dSJohannes Thumshirn 35378f32380dSJohannes Thumshirn latest = super; 3538a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3539a512bbf8SYan Zheng } 3540a512bbf8SYan Zheng } 354192fc03fbSAnand Jain 35428f32380dSJohannes Thumshirn return super; 3543a512bbf8SYan Zheng } 3544a512bbf8SYan Zheng 35454eedeb75SHisashi Hifumi /* 3546abbb3b8eSDavid Sterba * Write superblock @sb to the @device. Do not wait for completion, all the 3547314b6dd0SJohannes Thumshirn * pages we use for writing are locked. 35484eedeb75SHisashi Hifumi * 3549abbb3b8eSDavid Sterba * Write @max_mirrors copies of the superblock, where 0 means default that fit 3550abbb3b8eSDavid Sterba * the expected device size at commit time. Note that max_mirrors must be 3551abbb3b8eSDavid Sterba * same for write and wait phases. 35524eedeb75SHisashi Hifumi * 3553314b6dd0SJohannes Thumshirn * Return number of errors when page is not found or submission fails. 35544eedeb75SHisashi Hifumi */ 3555a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3556abbb3b8eSDavid Sterba struct btrfs_super_block *sb, int max_mirrors) 3557a512bbf8SYan Zheng { 3558d5178578SJohannes Thumshirn struct btrfs_fs_info *fs_info = device->fs_info; 3559314b6dd0SJohannes Thumshirn struct address_space *mapping = device->bdev->bd_inode->i_mapping; 3560d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 3561a512bbf8SYan Zheng int i; 3562a512bbf8SYan Zheng int errors = 0; 3563a512bbf8SYan Zheng u64 bytenr; 3564a512bbf8SYan Zheng 3565a512bbf8SYan Zheng if (max_mirrors == 0) 3566a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3567a512bbf8SYan Zheng 3568d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 3569d5178578SJohannes Thumshirn 3570a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3571314b6dd0SJohannes Thumshirn struct page *page; 3572314b6dd0SJohannes Thumshirn struct bio *bio; 3573314b6dd0SJohannes Thumshirn struct btrfs_super_block *disk_super; 3574314b6dd0SJohannes Thumshirn 3575a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3576935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3577935e5cc9SMiao Xie device->commit_total_bytes) 3578a512bbf8SYan Zheng break; 3579a512bbf8SYan Zheng 3580a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3581a512bbf8SYan Zheng 3582fd08001fSEric Biggers crypto_shash_digest(shash, (const char *)sb + BTRFS_CSUM_SIZE, 3583fd08001fSEric Biggers BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, 3584fd08001fSEric Biggers sb->csum); 3585a512bbf8SYan Zheng 3586314b6dd0SJohannes Thumshirn page = find_or_create_page(mapping, bytenr >> PAGE_SHIFT, 3587314b6dd0SJohannes Thumshirn GFP_NOFS); 3588314b6dd0SJohannes Thumshirn if (!page) { 3589fb456252SJeff Mahoney btrfs_err(device->fs_info, 3590314b6dd0SJohannes Thumshirn "couldn't get super block page for bytenr %llu", 3591f14d104dSDavid Sterba bytenr); 3592634554dcSJosef Bacik errors++; 3593634554dcSJosef Bacik continue; 3594634554dcSJosef Bacik } 3595634554dcSJosef Bacik 3596314b6dd0SJohannes Thumshirn /* Bump the refcount for wait_dev_supers() */ 3597314b6dd0SJohannes Thumshirn get_page(page); 3598a512bbf8SYan Zheng 3599314b6dd0SJohannes Thumshirn disk_super = page_address(page); 3600314b6dd0SJohannes Thumshirn memcpy(disk_super, sb, BTRFS_SUPER_INFO_SIZE); 3601a512bbf8SYan Zheng 3602387125fcSChris Mason /* 3603314b6dd0SJohannes Thumshirn * Directly use bios here instead of relying on the page cache 3604314b6dd0SJohannes Thumshirn * to do I/O, so we don't lose the ability to do integrity 3605314b6dd0SJohannes Thumshirn * checking. 3606387125fcSChris Mason */ 3607314b6dd0SJohannes Thumshirn bio = bio_alloc(GFP_NOFS, 1); 3608314b6dd0SJohannes Thumshirn bio_set_dev(bio, device->bdev); 3609314b6dd0SJohannes Thumshirn bio->bi_iter.bi_sector = bytenr >> SECTOR_SHIFT; 3610314b6dd0SJohannes Thumshirn bio->bi_private = device; 3611314b6dd0SJohannes Thumshirn bio->bi_end_io = btrfs_end_super_write; 3612314b6dd0SJohannes Thumshirn __bio_add_page(bio, page, BTRFS_SUPER_INFO_SIZE, 3613314b6dd0SJohannes Thumshirn offset_in_page(bytenr)); 3614314b6dd0SJohannes Thumshirn 3615314b6dd0SJohannes Thumshirn /* 3616314b6dd0SJohannes Thumshirn * We FUA only the first super block. The others we allow to 3617314b6dd0SJohannes Thumshirn * go down lazy and there's a short window where the on-disk 3618314b6dd0SJohannes Thumshirn * copies might still contain the older version. 3619314b6dd0SJohannes Thumshirn */ 3620314b6dd0SJohannes Thumshirn bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_META | REQ_PRIO; 36211b9e619cSOmar Sandoval if (i == 0 && !btrfs_test_opt(device->fs_info, NOBARRIER)) 3622314b6dd0SJohannes Thumshirn bio->bi_opf |= REQ_FUA; 3623314b6dd0SJohannes Thumshirn 3624314b6dd0SJohannes Thumshirn btrfsic_submit_bio(bio); 3625a512bbf8SYan Zheng } 3626a512bbf8SYan Zheng return errors < i ? 0 : -1; 3627a512bbf8SYan Zheng } 3628a512bbf8SYan Zheng 3629387125fcSChris Mason /* 3630abbb3b8eSDavid Sterba * Wait for write completion of superblocks done by write_dev_supers, 3631abbb3b8eSDavid Sterba * @max_mirrors same for write and wait phases. 3632abbb3b8eSDavid Sterba * 3633314b6dd0SJohannes Thumshirn * Return number of errors when page is not found or not marked up to 3634abbb3b8eSDavid Sterba * date. 3635abbb3b8eSDavid Sterba */ 3636abbb3b8eSDavid Sterba static int wait_dev_supers(struct btrfs_device *device, int max_mirrors) 3637abbb3b8eSDavid Sterba { 3638abbb3b8eSDavid Sterba int i; 3639abbb3b8eSDavid Sterba int errors = 0; 3640b6a535faSHoward McLauchlan bool primary_failed = false; 3641abbb3b8eSDavid Sterba u64 bytenr; 3642abbb3b8eSDavid Sterba 3643abbb3b8eSDavid Sterba if (max_mirrors == 0) 3644abbb3b8eSDavid Sterba max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3645abbb3b8eSDavid Sterba 3646abbb3b8eSDavid Sterba for (i = 0; i < max_mirrors; i++) { 3647314b6dd0SJohannes Thumshirn struct page *page; 3648314b6dd0SJohannes Thumshirn 3649abbb3b8eSDavid Sterba bytenr = btrfs_sb_offset(i); 3650abbb3b8eSDavid Sterba if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3651abbb3b8eSDavid Sterba device->commit_total_bytes) 3652abbb3b8eSDavid Sterba break; 3653abbb3b8eSDavid Sterba 3654314b6dd0SJohannes Thumshirn page = find_get_page(device->bdev->bd_inode->i_mapping, 3655314b6dd0SJohannes Thumshirn bytenr >> PAGE_SHIFT); 3656314b6dd0SJohannes Thumshirn if (!page) { 3657abbb3b8eSDavid Sterba errors++; 3658b6a535faSHoward McLauchlan if (i == 0) 3659b6a535faSHoward McLauchlan primary_failed = true; 3660abbb3b8eSDavid Sterba continue; 3661abbb3b8eSDavid Sterba } 3662314b6dd0SJohannes Thumshirn /* Page is submitted locked and unlocked once the IO completes */ 3663314b6dd0SJohannes Thumshirn wait_on_page_locked(page); 3664314b6dd0SJohannes Thumshirn if (PageError(page)) { 3665abbb3b8eSDavid Sterba errors++; 3666b6a535faSHoward McLauchlan if (i == 0) 3667b6a535faSHoward McLauchlan primary_failed = true; 3668b6a535faSHoward McLauchlan } 3669abbb3b8eSDavid Sterba 3670314b6dd0SJohannes Thumshirn /* Drop our reference */ 3671314b6dd0SJohannes Thumshirn put_page(page); 3672abbb3b8eSDavid Sterba 3673314b6dd0SJohannes Thumshirn /* Drop the reference from the writing run */ 3674314b6dd0SJohannes Thumshirn put_page(page); 3675abbb3b8eSDavid Sterba } 3676abbb3b8eSDavid Sterba 3677b6a535faSHoward McLauchlan /* log error, force error return */ 3678b6a535faSHoward McLauchlan if (primary_failed) { 3679b6a535faSHoward McLauchlan btrfs_err(device->fs_info, "error writing primary super block to device %llu", 3680b6a535faSHoward McLauchlan device->devid); 3681b6a535faSHoward McLauchlan return -1; 3682b6a535faSHoward McLauchlan } 3683b6a535faSHoward McLauchlan 3684abbb3b8eSDavid Sterba return errors < i ? 0 : -1; 3685abbb3b8eSDavid Sterba } 3686abbb3b8eSDavid Sterba 3687abbb3b8eSDavid Sterba /* 3688387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3689387125fcSChris Mason * for the barrier when it is done 3690387125fcSChris Mason */ 36914246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3692387125fcSChris Mason { 3693387125fcSChris Mason complete(bio->bi_private); 3694387125fcSChris Mason } 3695387125fcSChris Mason 3696387125fcSChris Mason /* 36974fc6441aSAnand Jain * Submit a flush request to the device if it supports it. Error handling is 36984fc6441aSAnand Jain * done in the waiting counterpart. 3699387125fcSChris Mason */ 37004fc6441aSAnand Jain static void write_dev_flush(struct btrfs_device *device) 3701387125fcSChris Mason { 3702c2a9c7abSAnand Jain struct request_queue *q = bdev_get_queue(device->bdev); 3703e0ae9994SDavid Sterba struct bio *bio = device->flush_bio; 3704387125fcSChris Mason 3705c2a9c7abSAnand Jain if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) 37064fc6441aSAnand Jain return; 3707387125fcSChris Mason 3708e0ae9994SDavid Sterba bio_reset(bio); 3709387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 371074d46992SChristoph Hellwig bio_set_dev(bio, device->bdev); 37118d910125SJan Kara bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH; 3712387125fcSChris Mason init_completion(&device->flush_wait); 3713387125fcSChris Mason bio->bi_private = &device->flush_wait; 3714387125fcSChris Mason 371543a01111SLu Fengqi btrfsic_submit_bio(bio); 37161c3063b6SAnand Jain set_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 37174fc6441aSAnand Jain } 3718387125fcSChris Mason 37194fc6441aSAnand Jain /* 37204fc6441aSAnand Jain * If the flush bio has been submitted by write_dev_flush, wait for it. 37214fc6441aSAnand Jain */ 37228c27cb35SLinus Torvalds static blk_status_t wait_dev_flush(struct btrfs_device *device) 37234fc6441aSAnand Jain { 37244fc6441aSAnand Jain struct bio *bio = device->flush_bio; 37254fc6441aSAnand Jain 37261c3063b6SAnand Jain if (!test_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state)) 372758efbc9fSOmar Sandoval return BLK_STS_OK; 37284fc6441aSAnand Jain 37291c3063b6SAnand Jain clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 37302980d574SDavid Sterba wait_for_completion_io(&device->flush_wait); 37314fc6441aSAnand Jain 37328c27cb35SLinus Torvalds return bio->bi_status; 3733387125fcSChris Mason } 3734387125fcSChris Mason 3735d10b82feSQu Wenruo static int check_barrier_error(struct btrfs_fs_info *fs_info) 3736401b41e5SAnand Jain { 37376528b99dSAnand Jain if (!btrfs_check_rw_degradable(fs_info, NULL)) 3738401b41e5SAnand Jain return -EIO; 3739387125fcSChris Mason return 0; 3740387125fcSChris Mason } 3741387125fcSChris Mason 3742387125fcSChris Mason /* 3743387125fcSChris Mason * send an empty flush down to each device in parallel, 3744387125fcSChris Mason * then wait for them 3745387125fcSChris Mason */ 3746387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3747387125fcSChris Mason { 3748387125fcSChris Mason struct list_head *head; 3749387125fcSChris Mason struct btrfs_device *dev; 37505af3e8ccSStefan Behrens int errors_wait = 0; 37514e4cbee9SChristoph Hellwig blk_status_t ret; 3752387125fcSChris Mason 37531538e6c5SDavid Sterba lockdep_assert_held(&info->fs_devices->device_list_mutex); 3754387125fcSChris Mason /* send down all the barriers */ 3755387125fcSChris Mason head = &info->fs_devices->devices; 37561538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3757e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3758f88ba6a2SHidetoshi Seto continue; 3759cea7c8bfSAnand Jain if (!dev->bdev) 3760387125fcSChris Mason continue; 3761e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3762ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3763387125fcSChris Mason continue; 3764387125fcSChris Mason 37654fc6441aSAnand Jain write_dev_flush(dev); 376658efbc9fSOmar Sandoval dev->last_flush_error = BLK_STS_OK; 3767387125fcSChris Mason } 3768387125fcSChris Mason 3769387125fcSChris Mason /* wait for all the barriers */ 37701538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3771e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3772f88ba6a2SHidetoshi Seto continue; 3773387125fcSChris Mason if (!dev->bdev) { 37745af3e8ccSStefan Behrens errors_wait++; 3775387125fcSChris Mason continue; 3776387125fcSChris Mason } 3777e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3778ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3779387125fcSChris Mason continue; 3780387125fcSChris Mason 37814fc6441aSAnand Jain ret = wait_dev_flush(dev); 3782401b41e5SAnand Jain if (ret) { 3783401b41e5SAnand Jain dev->last_flush_error = ret; 378466b4993eSDavid Sterba btrfs_dev_stat_inc_and_print(dev, 378566b4993eSDavid Sterba BTRFS_DEV_STAT_FLUSH_ERRS); 37865af3e8ccSStefan Behrens errors_wait++; 3787387125fcSChris Mason } 3788401b41e5SAnand Jain } 3789401b41e5SAnand Jain 3790cea7c8bfSAnand Jain if (errors_wait) { 3791401b41e5SAnand Jain /* 3792401b41e5SAnand Jain * At some point we need the status of all disks 3793401b41e5SAnand Jain * to arrive at the volume status. So error checking 3794401b41e5SAnand Jain * is being pushed to a separate loop. 3795401b41e5SAnand Jain */ 3796d10b82feSQu Wenruo return check_barrier_error(info); 3797401b41e5SAnand Jain } 3798387125fcSChris Mason return 0; 3799387125fcSChris Mason } 3800387125fcSChris Mason 3801943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3802943c6e99SZhao Lei { 38038789f4feSZhao Lei int raid_type; 38048789f4feSZhao Lei int min_tolerated = INT_MAX; 3805943c6e99SZhao Lei 38068789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 38078789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 38088c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 38098789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 38108789f4feSZhao Lei tolerated_failures); 3811943c6e99SZhao Lei 38128789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 38138789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 38148789f4feSZhao Lei continue; 381541a6e891SAnand Jain if (!(flags & btrfs_raid_array[raid_type].bg_flag)) 38168789f4feSZhao Lei continue; 38178c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 38188789f4feSZhao Lei btrfs_raid_array[raid_type]. 38198789f4feSZhao Lei tolerated_failures); 38208789f4feSZhao Lei } 3821943c6e99SZhao Lei 38228789f4feSZhao Lei if (min_tolerated == INT_MAX) { 3823ab8d0fc4SJeff Mahoney pr_warn("BTRFS: unknown raid flag: %llu", flags); 38248789f4feSZhao Lei min_tolerated = 0; 38258789f4feSZhao Lei } 38268789f4feSZhao Lei 38278789f4feSZhao Lei return min_tolerated; 3828943c6e99SZhao Lei } 3829943c6e99SZhao Lei 3830eece6a9cSDavid Sterba int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) 3831f2984462SChris Mason { 3832e5e9a520SChris Mason struct list_head *head; 3833f2984462SChris Mason struct btrfs_device *dev; 3834a061fc8dSChris Mason struct btrfs_super_block *sb; 3835f2984462SChris Mason struct btrfs_dev_item *dev_item; 3836f2984462SChris Mason int ret; 3837f2984462SChris Mason int do_barriers; 3838a236aed1SChris Mason int max_errors; 3839a236aed1SChris Mason int total_errors = 0; 3840a061fc8dSChris Mason u64 flags; 3841f2984462SChris Mason 38420b246afaSJeff Mahoney do_barriers = !btrfs_test_opt(fs_info, NOBARRIER); 3843fed3b381SLiu Bo 3844fed3b381SLiu Bo /* 3845fed3b381SLiu Bo * max_mirrors == 0 indicates we're from commit_transaction, 3846fed3b381SLiu Bo * not from fsync where the tree roots in fs_info have not 3847fed3b381SLiu Bo * been consistent on disk. 3848fed3b381SLiu Bo */ 3849fed3b381SLiu Bo if (max_mirrors == 0) 38500b246afaSJeff Mahoney backup_super_roots(fs_info); 3851f2984462SChris Mason 38520b246afaSJeff Mahoney sb = fs_info->super_for_commit; 3853a061fc8dSChris Mason dev_item = &sb->dev_item; 3854e5e9a520SChris Mason 38550b246afaSJeff Mahoney mutex_lock(&fs_info->fs_devices->device_list_mutex); 38560b246afaSJeff Mahoney head = &fs_info->fs_devices->devices; 38570b246afaSJeff Mahoney max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1; 3858387125fcSChris Mason 38595af3e8ccSStefan Behrens if (do_barriers) { 38600b246afaSJeff Mahoney ret = barrier_all_devices(fs_info); 38615af3e8ccSStefan Behrens if (ret) { 38625af3e8ccSStefan Behrens mutex_unlock( 38630b246afaSJeff Mahoney &fs_info->fs_devices->device_list_mutex); 38640b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 38655af3e8ccSStefan Behrens "errors while submitting device barriers."); 38665af3e8ccSStefan Behrens return ret; 38675af3e8ccSStefan Behrens } 38685af3e8ccSStefan Behrens } 3869387125fcSChris Mason 38701538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3871dfe25020SChris Mason if (!dev->bdev) { 3872dfe25020SChris Mason total_errors++; 3873dfe25020SChris Mason continue; 3874dfe25020SChris Mason } 3875e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3876ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3877dfe25020SChris Mason continue; 3878dfe25020SChris Mason 38792b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3880a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3881a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 38827df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3883935e5cc9SMiao Xie dev->commit_total_bytes); 3884ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3885ce7213c7SMiao Xie dev->commit_bytes_used); 3886a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3887a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3888a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3889a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 38907239ff4bSNikolay Borisov memcpy(dev_item->fsid, dev->fs_devices->metadata_uuid, 38917239ff4bSNikolay Borisov BTRFS_FSID_SIZE); 3892a512bbf8SYan Zheng 3893a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3894a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3895f2984462SChris Mason 389675cb857dSQu Wenruo ret = btrfs_validate_write_super(fs_info, sb); 389775cb857dSQu Wenruo if (ret < 0) { 389875cb857dSQu Wenruo mutex_unlock(&fs_info->fs_devices->device_list_mutex); 389975cb857dSQu Wenruo btrfs_handle_fs_error(fs_info, -EUCLEAN, 390075cb857dSQu Wenruo "unexpected superblock corruption detected"); 390175cb857dSQu Wenruo return -EUCLEAN; 390275cb857dSQu Wenruo } 390375cb857dSQu Wenruo 3904abbb3b8eSDavid Sterba ret = write_dev_supers(dev, sb, max_mirrors); 3905a236aed1SChris Mason if (ret) 3906a236aed1SChris Mason total_errors++; 3907f2984462SChris Mason } 3908a236aed1SChris Mason if (total_errors > max_errors) { 39090b246afaSJeff Mahoney btrfs_err(fs_info, "%d errors while writing supers", 3910d397712bSChris Mason total_errors); 39110b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 391279787eaaSJeff Mahoney 39139d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 39140b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 39150b246afaSJeff Mahoney "%d errors while writing supers", 39160b246afaSJeff Mahoney total_errors); 39179d565ba4SStefan Behrens return -EIO; 3918a236aed1SChris Mason } 3919f2984462SChris Mason 3920a512bbf8SYan Zheng total_errors = 0; 39211538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3922dfe25020SChris Mason if (!dev->bdev) 3923dfe25020SChris Mason continue; 3924e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3925ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3926dfe25020SChris Mason continue; 3927dfe25020SChris Mason 3928abbb3b8eSDavid Sterba ret = wait_dev_supers(dev, max_mirrors); 3929a512bbf8SYan Zheng if (ret) 39301259ab75SChris Mason total_errors++; 3931f2984462SChris Mason } 39320b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 3933a236aed1SChris Mason if (total_errors > max_errors) { 39340b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 39350b246afaSJeff Mahoney "%d errors while writing supers", 39360b246afaSJeff Mahoney total_errors); 393779787eaaSJeff Mahoney return -EIO; 3938a236aed1SChris Mason } 3939f2984462SChris Mason return 0; 3940f2984462SChris Mason } 3941f2984462SChris Mason 3942cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3943cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3944cb517eabSMiao Xie struct btrfs_root *root) 39452619ba1fSChris Mason { 39464785e24fSJosef Bacik bool drop_ref = false; 39474785e24fSJosef Bacik 39484df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 39492619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 39502619ba1fSChris Mason (unsigned long)root->root_key.objectid); 3951af01d2e5SJosef Bacik if (test_and_clear_bit(BTRFS_ROOT_IN_RADIX, &root->state)) 39524785e24fSJosef Bacik drop_ref = true; 39534df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 395476dda93cSYan, Zheng 39551c1ea4f7SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 3956ef67963dSJosef Bacik ASSERT(root->log_root == NULL); 39571c1ea4f7SLiu Bo if (root->reloc_root) { 395800246528SJosef Bacik btrfs_put_root(root->reloc_root); 39591c1ea4f7SLiu Bo root->reloc_root = NULL; 39601c1ea4f7SLiu Bo } 39611c1ea4f7SLiu Bo } 39623321719eSLiu Bo 3963faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3964581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3965faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3966581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 39670e996e7fSJosef Bacik if (root->ino_cache_inode) { 39680e996e7fSJosef Bacik iput(root->ino_cache_inode); 39690e996e7fSJosef Bacik root->ino_cache_inode = NULL; 39700e996e7fSJosef Bacik } 39714785e24fSJosef Bacik if (drop_ref) 397200246528SJosef Bacik btrfs_put_root(root); 39732619ba1fSChris Mason } 39742619ba1fSChris Mason 3975c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3976c146afadSYan Zheng { 3977c146afadSYan Zheng u64 root_objectid = 0; 3978c146afadSYan Zheng struct btrfs_root *gang[8]; 397965d33fd7SQu Wenruo int i = 0; 398065d33fd7SQu Wenruo int err = 0; 398165d33fd7SQu Wenruo unsigned int ret = 0; 3982c146afadSYan Zheng 3983c146afadSYan Zheng while (1) { 3984efc34534SJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 3985c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3986c146afadSYan Zheng (void **)gang, root_objectid, 3987c146afadSYan Zheng ARRAY_SIZE(gang)); 398865d33fd7SQu Wenruo if (!ret) { 3989efc34534SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 3990c146afadSYan Zheng break; 399165d33fd7SQu Wenruo } 39925d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 399366b4ffd1SJosef Bacik 399465d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 399565d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 399665d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 399765d33fd7SQu Wenruo gang[i] = NULL; 399865d33fd7SQu Wenruo continue; 399965d33fd7SQu Wenruo } 400065d33fd7SQu Wenruo /* grab all the search result for later use */ 400100246528SJosef Bacik gang[i] = btrfs_grab_root(gang[i]); 400265d33fd7SQu Wenruo } 4003efc34534SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 400465d33fd7SQu Wenruo 400565d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 400665d33fd7SQu Wenruo if (!gang[i]) 400765d33fd7SQu Wenruo continue; 4008c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 400966b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 401066b4ffd1SJosef Bacik if (err) 401165d33fd7SQu Wenruo break; 401200246528SJosef Bacik btrfs_put_root(gang[i]); 4013c146afadSYan Zheng } 4014c146afadSYan Zheng root_objectid++; 4015c146afadSYan Zheng } 401665d33fd7SQu Wenruo 401765d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 401865d33fd7SQu Wenruo for (; i < ret; i++) { 401965d33fd7SQu Wenruo if (gang[i]) 402000246528SJosef Bacik btrfs_put_root(gang[i]); 402165d33fd7SQu Wenruo } 402265d33fd7SQu Wenruo return err; 4023c146afadSYan Zheng } 4024c146afadSYan Zheng 40256bccf3abSJeff Mahoney int btrfs_commit_super(struct btrfs_fs_info *fs_info) 4026c146afadSYan Zheng { 40276bccf3abSJeff Mahoney struct btrfs_root *root = fs_info->tree_root; 4028c146afadSYan Zheng struct btrfs_trans_handle *trans; 4029c146afadSYan Zheng 40300b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 40312ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 40320b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 40330b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 4034c71bf099SYan, Zheng 4035c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 40360b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 40370b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 4038c71bf099SYan, Zheng 40397a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 40403612b495STsutomu Itoh if (IS_ERR(trans)) 40413612b495STsutomu Itoh return PTR_ERR(trans); 40423a45bb20SJeff Mahoney return btrfs_commit_transaction(trans); 4043c146afadSYan Zheng } 4044c146afadSYan Zheng 4045b105e927SDavid Sterba void __cold close_ctree(struct btrfs_fs_info *fs_info) 4046eb60ceacSChris Mason { 4047c146afadSYan Zheng int ret; 4048e089f05cSChris Mason 4049afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); 4050d6fd0ae2SOmar Sandoval /* 4051d6fd0ae2SOmar Sandoval * We don't want the cleaner to start new transactions, add more delayed 4052d6fd0ae2SOmar Sandoval * iputs, etc. while we're closing. We can't use kthread_stop() yet 4053d6fd0ae2SOmar Sandoval * because that frees the task_struct, and the transaction kthread might 4054d6fd0ae2SOmar Sandoval * still try to wake up the cleaner. 4055d6fd0ae2SOmar Sandoval */ 4056d6fd0ae2SOmar Sandoval kthread_park(fs_info->cleaner_kthread); 4057a2135011SChris Mason 40587343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 4059d06f23d6SJeff Mahoney btrfs_qgroup_wait_for_completion(fs_info, false); 40607343dd61SJustin Maggard 4061803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 4062803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 4063803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 4064803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 4065803b2f54SStefan Behrens 4066837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 4067aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 4068837d5b6eSIlya Dryomov 40698dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 40708dabb742SStefan Behrens 4071aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 40724cb5300bSChris Mason 40734cb5300bSChris Mason /* wait for any defraggers to finish */ 40744cb5300bSChris Mason wait_event(fs_info->transaction_wait, 40754cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 40764cb5300bSChris Mason 40774cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 407826176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 40794cb5300bSChris Mason 408021c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 408121c7e756SMiao Xie 4082b0643e59SDennis Zhou /* Cancel or finish ongoing discard work */ 4083b0643e59SDennis Zhou btrfs_discard_cleanup(fs_info); 4084b0643e59SDennis Zhou 4085bc98a42cSDavid Howells if (!sb_rdonly(fs_info->sb)) { 4086e44163e1SJeff Mahoney /* 4087d6fd0ae2SOmar Sandoval * The cleaner kthread is stopped, so do one final pass over 4088d6fd0ae2SOmar Sandoval * unused block groups. 4089e44163e1SJeff Mahoney */ 40900b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 4091e44163e1SJeff Mahoney 4092f0cc2cd7SFilipe Manana /* 4093f0cc2cd7SFilipe Manana * There might be existing delayed inode workers still running 4094f0cc2cd7SFilipe Manana * and holding an empty delayed inode item. We must wait for 4095f0cc2cd7SFilipe Manana * them to complete first because they can create a transaction. 4096f0cc2cd7SFilipe Manana * This happens when someone calls btrfs_balance_delayed_items() 4097f0cc2cd7SFilipe Manana * and then a transaction commit runs the same delayed nodes 4098f0cc2cd7SFilipe Manana * before any delayed worker has done something with the nodes. 4099f0cc2cd7SFilipe Manana * We must wait for any worker here and not at transaction 4100f0cc2cd7SFilipe Manana * commit time since that could cause a deadlock. 4101f0cc2cd7SFilipe Manana * This is a very rare case. 4102f0cc2cd7SFilipe Manana */ 4103f0cc2cd7SFilipe Manana btrfs_flush_workqueue(fs_info->delayed_workers); 4104f0cc2cd7SFilipe Manana 41056bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 4106d397712bSChris Mason if (ret) 410704892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 4108c146afadSYan Zheng } 4109ed2ff2cbSChris Mason 4110af722733SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state) || 4111af722733SLiu Bo test_bit(BTRFS_FS_STATE_TRANS_ABORTED, &fs_info->fs_state)) 41122ff7e61eSJeff Mahoney btrfs_error_commit_super(fs_info); 4113acce952bSliubo 4114e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 4115e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 41168929ecfaSYan, Zheng 4117e187831eSJosef Bacik ASSERT(list_empty(&fs_info->delayed_iputs)); 4118afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); 4119f25784b3SYan Zheng 41205958253cSQu Wenruo if (btrfs_check_quota_leak(fs_info)) { 41215958253cSQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 41225958253cSQu Wenruo btrfs_err(fs_info, "qgroup reserved space leaked"); 41235958253cSQu Wenruo } 41245958253cSQu Wenruo 412504892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 4126fe816d0fSNikolay Borisov ASSERT(list_empty(&fs_info->delalloc_roots)); 4127bcef60f2SArne Jansen 4128963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 412904892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 4130963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 4131b0c68f8bSChris Mason } 413231153d81SYan Zheng 41334297ff84SJosef Bacik if (percpu_counter_sum(&fs_info->dio_bytes)) 41344297ff84SJosef Bacik btrfs_info(fs_info, "at unmount dio bytes count %lld", 41354297ff84SJosef Bacik percpu_counter_sum(&fs_info->dio_bytes)); 41364297ff84SJosef Bacik 41376618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 4138b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 41395ac1d209SJeff Mahoney 41401a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 41411a4319ccSLiu Bo 4142de348ee0SWang Shilong /* 4143de348ee0SWang Shilong * we must make sure there is not any read request to 4144de348ee0SWang Shilong * submit after we stopping all workers. 4145de348ee0SWang Shilong */ 4146de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 414796192499SJosef Bacik btrfs_stop_all_workers(fs_info); 414896192499SJosef Bacik 4149afcdd129SJosef Bacik clear_bit(BTRFS_FS_OPEN, &fs_info->flags); 41504273eaffSAnand Jain free_root_pointers(fs_info, true); 41518c38938cSJosef Bacik btrfs_free_fs_roots(fs_info); 41529ad6b7bcSChris Mason 41534e19443dSJosef Bacik /* 41544e19443dSJosef Bacik * We must free the block groups after dropping the fs_roots as we could 41554e19443dSJosef Bacik * have had an IO error and have left over tree log blocks that aren't 41564e19443dSJosef Bacik * cleaned up until the fs roots are freed. This makes the block group 41574e19443dSJosef Bacik * accounting appear to be wrong because there's pending reserved bytes, 41584e19443dSJosef Bacik * so make sure we do the block group cleanup afterwards. 41594e19443dSJosef Bacik */ 41604e19443dSJosef Bacik btrfs_free_block_groups(fs_info); 41614e19443dSJosef Bacik 416213e6c37bSJosef Bacik iput(fs_info->btree_inode); 4163d6bfde87SChris Mason 416421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 41650b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) 41662ff7e61eSJeff Mahoney btrfsic_unmount(fs_info->fs_devices); 416721adbd5cSStefan Behrens #endif 416821adbd5cSStefan Behrens 41690b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 417068c94e55SNikolay Borisov btrfs_close_devices(fs_info->fs_devices); 4171eb60ceacSChris Mason } 4172eb60ceacSChris Mason 4173b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 4174b9fab919SChris Mason int atomic) 4175ccd467d6SChris Mason { 41761259ab75SChris Mason int ret; 4177727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 41781259ab75SChris Mason 41790b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 41801259ab75SChris Mason if (!ret) 41811259ab75SChris Mason return ret; 41821259ab75SChris Mason 41831259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 4184b9fab919SChris Mason parent_transid, atomic); 4185b9fab919SChris Mason if (ret == -EAGAIN) 4186b9fab919SChris Mason return ret; 41871259ab75SChris Mason return !ret; 41885f39d397SChris Mason } 41896702ed49SChris Mason 41905f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 41915f39d397SChris Mason { 41920b246afaSJeff Mahoney struct btrfs_fs_info *fs_info; 419306ea65a3SJosef Bacik struct btrfs_root *root; 41945f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 4195b9473439SChris Mason int was_dirty; 4196b4ce94deSChris Mason 419706ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 419806ea65a3SJosef Bacik /* 419906ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 420052042d8eSAndrea Gelmini * enabled. Normal people shouldn't be using unmapped buffers as dirty 420106ea65a3SJosef Bacik * outside of the sanity tests. 420206ea65a3SJosef Bacik */ 4203b0132a3bSNikolay Borisov if (unlikely(test_bit(EXTENT_BUFFER_UNMAPPED, &buf->bflags))) 420406ea65a3SJosef Bacik return; 420506ea65a3SJosef Bacik #endif 420606ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 42070b246afaSJeff Mahoney fs_info = root->fs_info; 4208b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 42090b246afaSJeff Mahoney if (transid != fs_info->generation) 42105d163e0eSJeff Mahoney WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", 42110b246afaSJeff Mahoney buf->start, transid, fs_info->generation); 42120b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 4213e2d84521SMiao Xie if (!was_dirty) 4214104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 4215e2d84521SMiao Xie buf->len, 42160b246afaSJeff Mahoney fs_info->dirty_metadata_batch); 42171f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 421869fc6cbbSQu Wenruo /* 421969fc6cbbSQu Wenruo * Since btrfs_mark_buffer_dirty() can be called with item pointer set 422069fc6cbbSQu Wenruo * but item data not updated. 422169fc6cbbSQu Wenruo * So here we should only check item pointers, not item data. 422269fc6cbbSQu Wenruo */ 422369fc6cbbSQu Wenruo if (btrfs_header_level(buf) == 0 && 4224cfdaad5eSDavid Sterba btrfs_check_leaf_relaxed(buf)) { 4225a4f78750SDavid Sterba btrfs_print_leaf(buf); 42261f21ef0aSFilipe Manana ASSERT(0); 42271f21ef0aSFilipe Manana } 42281f21ef0aSFilipe Manana #endif 4229eb60ceacSChris Mason } 4230eb60ceacSChris Mason 42312ff7e61eSJeff Mahoney static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info, 4232b53d3f5dSLiu Bo int flush_delayed) 423335b7e476SChris Mason { 4234188de649SChris Mason /* 4235188de649SChris Mason * looks as though older kernels can get into trouble with 4236188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4237188de649SChris Mason */ 4238e2d84521SMiao Xie int ret; 4239d6bfde87SChris Mason 42406933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4241d6bfde87SChris Mason return; 4242d6bfde87SChris Mason 4243b53d3f5dSLiu Bo if (flush_delayed) 42442ff7e61eSJeff Mahoney btrfs_balance_delayed_items(fs_info); 424516cdcec7SMiao Xie 4246d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 4247d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 4248d814a491SEthan Lien fs_info->dirty_metadata_batch); 4249e2d84521SMiao Xie if (ret > 0) { 42500b246afaSJeff Mahoney balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping); 425116cdcec7SMiao Xie } 425216cdcec7SMiao Xie } 425316cdcec7SMiao Xie 42542ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info) 425516cdcec7SMiao Xie { 42562ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 1); 425735b7e476SChris Mason } 4258b53d3f5dSLiu Bo 42592ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info) 4260b53d3f5dSLiu Bo { 42612ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 0); 4262d6bfde87SChris Mason } 42636b80053dSChris Mason 4264581c1760SQu Wenruo int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, 4265581c1760SQu Wenruo struct btrfs_key *first_key) 42666b80053dSChris Mason { 42675ab12d1fSDavid Sterba return btree_read_extent_buffer_pages(buf, parent_transid, 4268581c1760SQu Wenruo level, first_key); 42696b80053dSChris Mason } 42700da5468fSChris Mason 42712ff7e61eSJeff Mahoney static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info) 4272acce952bSliubo { 4273fe816d0fSNikolay Borisov /* cleanup FS via transaction */ 4274fe816d0fSNikolay Borisov btrfs_cleanup_transaction(fs_info); 4275fe816d0fSNikolay Borisov 42760b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 42772ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 42780b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 4279acce952bSliubo 42800b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 42810b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 4282acce952bSliubo } 4283acce952bSliubo 4284ef67963dSJosef Bacik static void btrfs_drop_all_logs(struct btrfs_fs_info *fs_info) 4285ef67963dSJosef Bacik { 4286ef67963dSJosef Bacik struct btrfs_root *gang[8]; 4287ef67963dSJosef Bacik u64 root_objectid = 0; 4288ef67963dSJosef Bacik int ret; 4289ef67963dSJosef Bacik 4290ef67963dSJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 4291ef67963dSJosef Bacik while ((ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 4292ef67963dSJosef Bacik (void **)gang, root_objectid, 4293ef67963dSJosef Bacik ARRAY_SIZE(gang))) != 0) { 4294ef67963dSJosef Bacik int i; 4295ef67963dSJosef Bacik 4296ef67963dSJosef Bacik for (i = 0; i < ret; i++) 4297ef67963dSJosef Bacik gang[i] = btrfs_grab_root(gang[i]); 4298ef67963dSJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 4299ef67963dSJosef Bacik 4300ef67963dSJosef Bacik for (i = 0; i < ret; i++) { 4301ef67963dSJosef Bacik if (!gang[i]) 4302ef67963dSJosef Bacik continue; 4303ef67963dSJosef Bacik root_objectid = gang[i]->root_key.objectid; 4304ef67963dSJosef Bacik btrfs_free_log(NULL, gang[i]); 4305ef67963dSJosef Bacik btrfs_put_root(gang[i]); 4306ef67963dSJosef Bacik } 4307ef67963dSJosef Bacik root_objectid++; 4308ef67963dSJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 4309ef67963dSJosef Bacik } 4310ef67963dSJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 4311ef67963dSJosef Bacik btrfs_free_log_root_tree(NULL, fs_info); 4312ef67963dSJosef Bacik } 4313ef67963dSJosef Bacik 4314143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4315acce952bSliubo { 4316acce952bSliubo struct btrfs_ordered_extent *ordered; 4317acce952bSliubo 4318199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4319779880efSJosef Bacik /* 4320779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4321779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4322779880efSJosef Bacik */ 4323199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4324779880efSJosef Bacik root_extent_list) 4325779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4326199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4327199c2a9cSMiao Xie } 4328199c2a9cSMiao Xie 4329199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4330199c2a9cSMiao Xie { 4331199c2a9cSMiao Xie struct btrfs_root *root; 4332199c2a9cSMiao Xie struct list_head splice; 4333199c2a9cSMiao Xie 4334199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4335199c2a9cSMiao Xie 4336199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4337199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4338199c2a9cSMiao Xie while (!list_empty(&splice)) { 4339199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4340199c2a9cSMiao Xie ordered_root); 43411de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 43421de2cfdeSJosef Bacik &fs_info->ordered_roots); 4343199c2a9cSMiao Xie 43442a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4345199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4346199c2a9cSMiao Xie 43472a85d9caSLiu Bo cond_resched(); 43482a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4349199c2a9cSMiao Xie } 4350199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 435174d5d229SJosef Bacik 435274d5d229SJosef Bacik /* 435374d5d229SJosef Bacik * We need this here because if we've been flipped read-only we won't 435474d5d229SJosef Bacik * get sync() from the umount, so we need to make sure any ordered 435574d5d229SJosef Bacik * extents that haven't had their dirty pages IO start writeout yet 435674d5d229SJosef Bacik * actually get run and error out properly. 435774d5d229SJosef Bacik */ 435874d5d229SJosef Bacik btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1); 4359acce952bSliubo } 4360acce952bSliubo 436135a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 43622ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4363acce952bSliubo { 4364acce952bSliubo struct rb_node *node; 4365acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4366acce952bSliubo struct btrfs_delayed_ref_node *ref; 4367acce952bSliubo int ret = 0; 4368acce952bSliubo 4369acce952bSliubo delayed_refs = &trans->delayed_refs; 4370acce952bSliubo 4371acce952bSliubo spin_lock(&delayed_refs->lock); 4372d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4373cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 4374b79ce3ddSDavid Sterba btrfs_debug(fs_info, "delayed_refs has NO entry"); 4375acce952bSliubo return ret; 4376acce952bSliubo } 4377acce952bSliubo 43785c9d028bSLiu Bo while ((node = rb_first_cached(&delayed_refs->href_root)) != NULL) { 4379d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 43800e0adbcfSJosef Bacik struct rb_node *n; 4381e78417d1SJosef Bacik bool pin_bytes = false; 4382acce952bSliubo 4383d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4384d7df2c79SJosef Bacik href_node); 43853069bd26SJosef Bacik if (btrfs_delayed_ref_lock(delayed_refs, head)) 4386b939d1abSJosef Bacik continue; 43873069bd26SJosef Bacik 4388d7df2c79SJosef Bacik spin_lock(&head->lock); 4389e3d03965SLiu Bo while ((n = rb_first_cached(&head->ref_tree)) != NULL) { 43900e0adbcfSJosef Bacik ref = rb_entry(n, struct btrfs_delayed_ref_node, 43910e0adbcfSJosef Bacik ref_node); 4392d7df2c79SJosef Bacik ref->in_tree = 0; 4393e3d03965SLiu Bo rb_erase_cached(&ref->ref_node, &head->ref_tree); 43940e0adbcfSJosef Bacik RB_CLEAR_NODE(&ref->ref_node); 43951d57ee94SWang Xiaoguang if (!list_empty(&ref->add_list)) 43961d57ee94SWang Xiaoguang list_del(&ref->add_list); 4397d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4398d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4399d7df2c79SJosef Bacik } 440054067ae9SJosef Bacik if (head->must_insert_reserved) 4401e78417d1SJosef Bacik pin_bytes = true; 440278a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4403fa781ceaSJosef Bacik btrfs_delete_ref_head(delayed_refs, head); 4404d7df2c79SJosef Bacik spin_unlock(&head->lock); 4405acce952bSliubo spin_unlock(&delayed_refs->lock); 4406e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4407acce952bSliubo 4408f603bb94SNikolay Borisov if (pin_bytes) { 4409f603bb94SNikolay Borisov struct btrfs_block_group *cache; 4410f603bb94SNikolay Borisov 4411f603bb94SNikolay Borisov cache = btrfs_lookup_block_group(fs_info, head->bytenr); 4412f603bb94SNikolay Borisov BUG_ON(!cache); 4413f603bb94SNikolay Borisov 4414f603bb94SNikolay Borisov spin_lock(&cache->space_info->lock); 4415f603bb94SNikolay Borisov spin_lock(&cache->lock); 4416f603bb94SNikolay Borisov cache->pinned += head->num_bytes; 4417f603bb94SNikolay Borisov btrfs_space_info_update_bytes_pinned(fs_info, 4418f603bb94SNikolay Borisov cache->space_info, head->num_bytes); 4419f603bb94SNikolay Borisov cache->reserved -= head->num_bytes; 4420f603bb94SNikolay Borisov cache->space_info->bytes_reserved -= head->num_bytes; 4421f603bb94SNikolay Borisov spin_unlock(&cache->lock); 4422f603bb94SNikolay Borisov spin_unlock(&cache->space_info->lock); 4423f603bb94SNikolay Borisov percpu_counter_add_batch( 4424f603bb94SNikolay Borisov &cache->space_info->total_bytes_pinned, 4425f603bb94SNikolay Borisov head->num_bytes, BTRFS_TOTAL_BYTES_PINNED_BATCH); 4426f603bb94SNikolay Borisov 4427f603bb94SNikolay Borisov btrfs_put_block_group(cache); 4428f603bb94SNikolay Borisov 4429f603bb94SNikolay Borisov btrfs_error_unpin_extent_range(fs_info, head->bytenr, 4430f603bb94SNikolay Borisov head->bytenr + head->num_bytes - 1); 4431f603bb94SNikolay Borisov } 443231890da0SJosef Bacik btrfs_cleanup_ref_head_accounting(fs_info, delayed_refs, head); 4433d278850eSJosef Bacik btrfs_put_delayed_ref_head(head); 4434acce952bSliubo cond_resched(); 4435acce952bSliubo spin_lock(&delayed_refs->lock); 4436acce952bSliubo } 443781f7eb00SJeff Mahoney btrfs_qgroup_destroy_extent_records(trans); 4438acce952bSliubo 4439acce952bSliubo spin_unlock(&delayed_refs->lock); 4440acce952bSliubo 4441acce952bSliubo return ret; 4442acce952bSliubo } 4443acce952bSliubo 4444143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4445acce952bSliubo { 4446acce952bSliubo struct btrfs_inode *btrfs_inode; 4447acce952bSliubo struct list_head splice; 4448acce952bSliubo 4449acce952bSliubo INIT_LIST_HEAD(&splice); 4450acce952bSliubo 4451eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4452eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4453acce952bSliubo 4454acce952bSliubo while (!list_empty(&splice)) { 4455fe816d0fSNikolay Borisov struct inode *inode = NULL; 4456eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4457acce952bSliubo delalloc_inodes); 4458fe816d0fSNikolay Borisov __btrfs_del_delalloc_inode(root, btrfs_inode); 4459eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4460acce952bSliubo 4461fe816d0fSNikolay Borisov /* 4462fe816d0fSNikolay Borisov * Make sure we get a live inode and that it'll not disappear 4463fe816d0fSNikolay Borisov * meanwhile. 4464fe816d0fSNikolay Borisov */ 4465fe816d0fSNikolay Borisov inode = igrab(&btrfs_inode->vfs_inode); 4466fe816d0fSNikolay Borisov if (inode) { 4467fe816d0fSNikolay Borisov invalidate_inode_pages2(inode->i_mapping); 4468fe816d0fSNikolay Borisov iput(inode); 4469fe816d0fSNikolay Borisov } 4470eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4471acce952bSliubo } 4472eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4473eb73c1b7SMiao Xie } 4474eb73c1b7SMiao Xie 4475eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4476eb73c1b7SMiao Xie { 4477eb73c1b7SMiao Xie struct btrfs_root *root; 4478eb73c1b7SMiao Xie struct list_head splice; 4479eb73c1b7SMiao Xie 4480eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4481eb73c1b7SMiao Xie 4482eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4483eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4484eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4485eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4486eb73c1b7SMiao Xie delalloc_root); 448700246528SJosef Bacik root = btrfs_grab_root(root); 4488eb73c1b7SMiao Xie BUG_ON(!root); 4489eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4490eb73c1b7SMiao Xie 4491eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 449200246528SJosef Bacik btrfs_put_root(root); 4493eb73c1b7SMiao Xie 4494eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4495eb73c1b7SMiao Xie } 4496eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4497acce952bSliubo } 4498acce952bSliubo 44992ff7e61eSJeff Mahoney static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, 4500acce952bSliubo struct extent_io_tree *dirty_pages, 4501acce952bSliubo int mark) 4502acce952bSliubo { 4503acce952bSliubo int ret; 4504acce952bSliubo struct extent_buffer *eb; 4505acce952bSliubo u64 start = 0; 4506acce952bSliubo u64 end; 4507acce952bSliubo 4508acce952bSliubo while (1) { 4509acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4510e6138876SJosef Bacik mark, NULL); 4511acce952bSliubo if (ret) 4512acce952bSliubo break; 4513acce952bSliubo 451491166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4515acce952bSliubo while (start <= end) { 45160b246afaSJeff Mahoney eb = find_extent_buffer(fs_info, start); 45170b246afaSJeff Mahoney start += fs_info->nodesize; 4518fd8b2b61SJosef Bacik if (!eb) 4519acce952bSliubo continue; 4520fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4521acce952bSliubo 4522fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4523fd8b2b61SJosef Bacik &eb->bflags)) 4524fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4525fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4526acce952bSliubo } 4527acce952bSliubo } 4528acce952bSliubo 4529acce952bSliubo return ret; 4530acce952bSliubo } 4531acce952bSliubo 45322ff7e61eSJeff Mahoney static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, 4533fe119a6eSNikolay Borisov struct extent_io_tree *unpin) 4534acce952bSliubo { 4535acce952bSliubo u64 start; 4536acce952bSliubo u64 end; 4537acce952bSliubo int ret; 4538acce952bSliubo 4539acce952bSliubo while (1) { 45400e6ec385SFilipe Manana struct extent_state *cached_state = NULL; 45410e6ec385SFilipe Manana 4542fcd5e742SLu Fengqi /* 4543fcd5e742SLu Fengqi * The btrfs_finish_extent_commit() may get the same range as 4544fcd5e742SLu Fengqi * ours between find_first_extent_bit and clear_extent_dirty. 4545fcd5e742SLu Fengqi * Hence, hold the unused_bg_unpin_mutex to avoid double unpin 4546fcd5e742SLu Fengqi * the same extent range. 4547fcd5e742SLu Fengqi */ 4548fcd5e742SLu Fengqi mutex_lock(&fs_info->unused_bg_unpin_mutex); 4549acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 45500e6ec385SFilipe Manana EXTENT_DIRTY, &cached_state); 4551fcd5e742SLu Fengqi if (ret) { 4552fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4553acce952bSliubo break; 4554fcd5e742SLu Fengqi } 4555acce952bSliubo 45560e6ec385SFilipe Manana clear_extent_dirty(unpin, start, end, &cached_state); 45570e6ec385SFilipe Manana free_extent_state(cached_state); 45582ff7e61eSJeff Mahoney btrfs_error_unpin_extent_range(fs_info, start, end); 4559fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4560acce952bSliubo cond_resched(); 4561acce952bSliubo } 4562acce952bSliubo 4563acce952bSliubo return 0; 4564acce952bSliubo } 4565acce952bSliubo 456632da5386SDavid Sterba static void btrfs_cleanup_bg_io(struct btrfs_block_group *cache) 4567c79a1751SLiu Bo { 4568c79a1751SLiu Bo struct inode *inode; 4569c79a1751SLiu Bo 4570c79a1751SLiu Bo inode = cache->io_ctl.inode; 4571c79a1751SLiu Bo if (inode) { 4572c79a1751SLiu Bo invalidate_inode_pages2(inode->i_mapping); 4573c79a1751SLiu Bo BTRFS_I(inode)->generation = 0; 4574c79a1751SLiu Bo cache->io_ctl.inode = NULL; 4575c79a1751SLiu Bo iput(inode); 4576c79a1751SLiu Bo } 4577bbc37d6eSFilipe Manana ASSERT(cache->io_ctl.pages == NULL); 4578c79a1751SLiu Bo btrfs_put_block_group(cache); 4579c79a1751SLiu Bo } 4580c79a1751SLiu Bo 4581c79a1751SLiu Bo void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, 45822ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4583c79a1751SLiu Bo { 458432da5386SDavid Sterba struct btrfs_block_group *cache; 4585c79a1751SLiu Bo 4586c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4587c79a1751SLiu Bo while (!list_empty(&cur_trans->dirty_bgs)) { 4588c79a1751SLiu Bo cache = list_first_entry(&cur_trans->dirty_bgs, 458932da5386SDavid Sterba struct btrfs_block_group, 4590c79a1751SLiu Bo dirty_list); 4591c79a1751SLiu Bo 4592c79a1751SLiu Bo if (!list_empty(&cache->io_list)) { 4593c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4594c79a1751SLiu Bo list_del_init(&cache->io_list); 4595c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4596c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4597c79a1751SLiu Bo } 4598c79a1751SLiu Bo 4599c79a1751SLiu Bo list_del_init(&cache->dirty_list); 4600c79a1751SLiu Bo spin_lock(&cache->lock); 4601c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4602c79a1751SLiu Bo spin_unlock(&cache->lock); 4603c79a1751SLiu Bo 4604c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4605c79a1751SLiu Bo btrfs_put_block_group(cache); 4606ba2c4d4eSJosef Bacik btrfs_delayed_refs_rsv_release(fs_info, 1); 4607c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4608c79a1751SLiu Bo } 4609c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4610c79a1751SLiu Bo 461145ae2c18SNikolay Borisov /* 461245ae2c18SNikolay Borisov * Refer to the definition of io_bgs member for details why it's safe 461345ae2c18SNikolay Borisov * to use it without any locking 461445ae2c18SNikolay Borisov */ 4615c79a1751SLiu Bo while (!list_empty(&cur_trans->io_bgs)) { 4616c79a1751SLiu Bo cache = list_first_entry(&cur_trans->io_bgs, 461732da5386SDavid Sterba struct btrfs_block_group, 4618c79a1751SLiu Bo io_list); 4619c79a1751SLiu Bo 4620c79a1751SLiu Bo list_del_init(&cache->io_list); 4621c79a1751SLiu Bo spin_lock(&cache->lock); 4622c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4623c79a1751SLiu Bo spin_unlock(&cache->lock); 4624c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4625c79a1751SLiu Bo } 4626c79a1751SLiu Bo } 4627c79a1751SLiu Bo 462849b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 46292ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 463049b25e05SJeff Mahoney { 4631bbbf7243SNikolay Borisov struct btrfs_device *dev, *tmp; 4632bbbf7243SNikolay Borisov 46332ff7e61eSJeff Mahoney btrfs_cleanup_dirty_bgs(cur_trans, fs_info); 4634c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->dirty_bgs)); 4635c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->io_bgs)); 4636c79a1751SLiu Bo 4637bbbf7243SNikolay Borisov list_for_each_entry_safe(dev, tmp, &cur_trans->dev_update_list, 4638bbbf7243SNikolay Borisov post_commit_list) { 4639bbbf7243SNikolay Borisov list_del_init(&dev->post_commit_list); 4640bbbf7243SNikolay Borisov } 4641bbbf7243SNikolay Borisov 46422ff7e61eSJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, fs_info); 464349b25e05SJeff Mahoney 46444a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 46450b246afaSJeff Mahoney wake_up(&fs_info->transaction_blocked_wait); 464649b25e05SJeff Mahoney 46474a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 46480b246afaSJeff Mahoney wake_up(&fs_info->transaction_wait); 464949b25e05SJeff Mahoney 4650ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 465167cde344SMiao Xie 46522ff7e61eSJeff Mahoney btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages, 465349b25e05SJeff Mahoney EXTENT_DIRTY); 4654fe119a6eSNikolay Borisov btrfs_destroy_pinned_extent(fs_info, &cur_trans->pinned_extents); 465549b25e05SJeff Mahoney 46564a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 46574a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 465849b25e05SJeff Mahoney } 465949b25e05SJeff Mahoney 46602ff7e61eSJeff Mahoney static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info) 4661acce952bSliubo { 4662acce952bSliubo struct btrfs_transaction *t; 4663acce952bSliubo 46640b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 4665acce952bSliubo 46660b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 46670b246afaSJeff Mahoney while (!list_empty(&fs_info->trans_list)) { 46680b246afaSJeff Mahoney t = list_first_entry(&fs_info->trans_list, 4669724e2315SJosef Bacik struct btrfs_transaction, list); 4670724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 46719b64f57dSElena Reshetova refcount_inc(&t->use_count); 46720b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 46732ff7e61eSJeff Mahoney btrfs_wait_for_commit(fs_info, t->transid); 4674724e2315SJosef Bacik btrfs_put_transaction(t); 46750b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4676724e2315SJosef Bacik continue; 4677724e2315SJosef Bacik } 46780b246afaSJeff Mahoney if (t == fs_info->running_transaction) { 4679724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 46800b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4681724e2315SJosef Bacik /* 4682724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4683724e2315SJosef Bacik * handle open currently for this transaction. 4684724e2315SJosef Bacik */ 4685724e2315SJosef Bacik wait_event(t->writer_wait, 4686724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4687724e2315SJosef Bacik } else { 46880b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4689724e2315SJosef Bacik } 46902ff7e61eSJeff Mahoney btrfs_cleanup_one_transaction(t, fs_info); 4691724e2315SJosef Bacik 46920b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 46930b246afaSJeff Mahoney if (t == fs_info->running_transaction) 46940b246afaSJeff Mahoney fs_info->running_transaction = NULL; 4695724e2315SJosef Bacik list_del_init(&t->list); 46960b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4697a4abeea4SJosef Bacik 4698724e2315SJosef Bacik btrfs_put_transaction(t); 46992ff7e61eSJeff Mahoney trace_btrfs_transaction_commit(fs_info->tree_root); 47000b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4701724e2315SJosef Bacik } 47020b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 47030b246afaSJeff Mahoney btrfs_destroy_all_ordered_extents(fs_info); 4704ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 4705ccdf9b30SJeff Mahoney btrfs_assert_delayed_root_empty(fs_info); 47060b246afaSJeff Mahoney btrfs_destroy_all_delalloc_inodes(fs_info); 4707ef67963dSJosef Bacik btrfs_drop_all_logs(fs_info); 47080b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 4709acce952bSliubo 4710acce952bSliubo return 0; 4711acce952bSliubo } 4712acce952bSliubo 4713e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 47144d53dddbSDavid Sterba /* mandatory callbacks */ 47150b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 47164d53dddbSDavid Sterba .readpage_end_io_hook = btree_readpage_end_io_hook, 47170da5468fSChris Mason }; 4718