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)) { 63935be8851SJohannes Thumshirn u8 val[BTRFS_CSUM_SIZE] = { 0 }; 6402996e1f8SJohannes Thumshirn 6412996e1f8SJohannes Thumshirn read_extent_buffer(eb, &val, 0, csum_size); 6422996e1f8SJohannes Thumshirn btrfs_warn_rl(fs_info, 64335be8851SJohannes Thumshirn "%s checksum verify failed on %llu wanted " CSUM_FMT " found " CSUM_FMT " level %d", 6442996e1f8SJohannes Thumshirn fs_info->sb->s_id, eb->start, 64535be8851SJohannes Thumshirn CSUM_FMT_VALUE(csum_size, val), 64635be8851SJohannes Thumshirn CSUM_FMT_VALUE(csum_size, result), 64735be8851SJohannes Thumshirn btrfs_header_level(eb)); 6482996e1f8SJohannes Thumshirn ret = -EUCLEAN; 6492996e1f8SJohannes Thumshirn goto err; 6502996e1f8SJohannes Thumshirn } 6512996e1f8SJohannes Thumshirn 652a826d6dcSJosef Bacik /* 653a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 654a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 655a826d6dcSJosef Bacik * return -EIO. 656a826d6dcSJosef Bacik */ 6571c4360eeSDavid Sterba if (found_level == 0 && btrfs_check_leaf_full(eb)) { 658a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 659a826d6dcSJosef Bacik ret = -EIO; 660a826d6dcSJosef Bacik } 661ce9adaa5SChris Mason 662813fd1dcSDavid Sterba if (found_level > 0 && btrfs_check_node(eb)) 663053ab70fSLiu Bo ret = -EIO; 664053ab70fSLiu Bo 6650b32f4bbSJosef Bacik if (!ret) 6660b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 66775391f0dSQu Wenruo else 66875391f0dSQu Wenruo btrfs_err(fs_info, 66975391f0dSQu Wenruo "block=%llu read time tree block corruption detected", 67075391f0dSQu Wenruo eb->start); 671ce9adaa5SChris Mason err: 67279fb65a1SJosef Bacik if (reads_done && 67379fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 674d48d71aaSDavid Sterba btree_readahead_hook(eb, ret); 6754bb31e92SArne Jansen 67653b381b3SDavid Woodhouse if (ret) { 67753b381b3SDavid Woodhouse /* 67853b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 67953b381b3SDavid Woodhouse * again, we have to make sure it has something 68053b381b3SDavid Woodhouse * to decrement 68153b381b3SDavid Woodhouse */ 68253b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6830b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 68453b381b3SDavid Woodhouse } 6850b32f4bbSJosef Bacik free_extent_buffer(eb); 686ce9adaa5SChris Mason out: 687f188591eSChris Mason return ret; 688ce9adaa5SChris Mason } 689ce9adaa5SChris Mason 6904246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 691ce9adaa5SChris Mason { 69297eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 693ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 6949e0af237SLiu Bo struct btrfs_workqueue *wq; 695ce9adaa5SChris Mason 696ce9adaa5SChris Mason fs_info = end_io_wq->info; 6974e4cbee9SChristoph Hellwig end_io_wq->status = bio->bi_status; 698d20f7043SChris Mason 69937226b21SMike Christie if (bio_op(bio) == REQ_OP_WRITE) { 700a0cac0ecSOmar Sandoval if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 7019e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 702a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 7039e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 704a0cac0ecSOmar Sandoval else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7059e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 706a0cac0ecSOmar Sandoval else 7079e0af237SLiu Bo wq = fs_info->endio_write_workers; 7089e0af237SLiu Bo } else { 7095c047a69SOmar Sandoval if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 7109e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 711a0cac0ecSOmar Sandoval else if (end_io_wq->metadata) 7129e0af237SLiu Bo wq = fs_info->endio_meta_workers; 713a0cac0ecSOmar Sandoval else 7149e0af237SLiu Bo wq = fs_info->endio_workers; 7159e0af237SLiu Bo } 7169e0af237SLiu Bo 717a0cac0ecSOmar Sandoval btrfs_init_work(&end_io_wq->work, end_workqueue_fn, NULL, NULL); 7189e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 719ce9adaa5SChris Mason } 720ce9adaa5SChris Mason 7214e4cbee9SChristoph Hellwig blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 722bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 7230b86a832SChris Mason { 72497eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 7258b110e39SMiao Xie 72697eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 727ce9adaa5SChris Mason if (!end_io_wq) 7284e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 729ce9adaa5SChris Mason 730ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 731ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 73222c59948SChris Mason end_io_wq->info = info; 7334e4cbee9SChristoph Hellwig end_io_wq->status = 0; 734ce9adaa5SChris Mason end_io_wq->bio = bio; 73522c59948SChris Mason end_io_wq->metadata = metadata; 736ce9adaa5SChris Mason 737ce9adaa5SChris Mason bio->bi_private = end_io_wq; 738ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 73922c59948SChris Mason return 0; 74022c59948SChris Mason } 74122c59948SChris Mason 7424a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7434a69a410SChris Mason { 7444a69a410SChris Mason struct async_submit_bio *async; 7454e4cbee9SChristoph Hellwig blk_status_t ret; 7464a69a410SChris Mason 7474a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 748c6100a4bSJosef Bacik ret = async->submit_bio_start(async->private_data, async->bio, 749eaf25d93SChris Mason async->bio_offset); 75079787eaaSJeff Mahoney if (ret) 7514e4cbee9SChristoph Hellwig async->status = ret; 7524a69a410SChris Mason } 7534a69a410SChris Mason 75406ea01b1SDavid Sterba /* 75506ea01b1SDavid Sterba * In order to insert checksums into the metadata in large chunks, we wait 75606ea01b1SDavid Sterba * until bio submission time. All the pages in the bio are checksummed and 75706ea01b1SDavid Sterba * sums are attached onto the ordered extent record. 75806ea01b1SDavid Sterba * 75906ea01b1SDavid Sterba * At IO completion time the csums attached on the ordered extent record are 76006ea01b1SDavid Sterba * inserted into the tree. 76106ea01b1SDavid Sterba */ 7624a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7638b712842SChris Mason { 7648b712842SChris Mason struct async_submit_bio *async; 76506ea01b1SDavid Sterba struct inode *inode; 76606ea01b1SDavid Sterba blk_status_t ret; 7678b712842SChris Mason 7688b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 76906ea01b1SDavid Sterba inode = async->private_data; 7704854ddd0SChris Mason 771bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 7724e4cbee9SChristoph Hellwig if (async->status) { 7734e4cbee9SChristoph Hellwig async->bio->bi_status = async->status; 7744246a0b6SChristoph Hellwig bio_endio(async->bio); 77579787eaaSJeff Mahoney return; 77679787eaaSJeff Mahoney } 77779787eaaSJeff Mahoney 778ec39f769SChris Mason /* 779ec39f769SChris Mason * All of the bios that pass through here are from async helpers. 780ec39f769SChris Mason * Use REQ_CGROUP_PUNT to issue them from the owning cgroup's context. 781ec39f769SChris Mason * This changes nothing when cgroups aren't in use. 782ec39f769SChris Mason */ 783ec39f769SChris Mason async->bio->bi_opf |= REQ_CGROUP_PUNT; 78408635baeSChris Mason ret = btrfs_map_bio(btrfs_sb(inode->i_sb), async->bio, async->mirror_num); 78506ea01b1SDavid Sterba if (ret) { 78606ea01b1SDavid Sterba async->bio->bi_status = ret; 78706ea01b1SDavid Sterba bio_endio(async->bio); 78806ea01b1SDavid Sterba } 7894a69a410SChris Mason } 7904a69a410SChris Mason 7914a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7924a69a410SChris Mason { 7934a69a410SChris Mason struct async_submit_bio *async; 7944a69a410SChris Mason 7954a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7968b712842SChris Mason kfree(async); 7978b712842SChris Mason } 7988b712842SChris Mason 7998c27cb35SLinus Torvalds blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 800c6100a4bSJosef Bacik int mirror_num, unsigned long bio_flags, 801c6100a4bSJosef Bacik u64 bio_offset, void *private_data, 802e288c080SDavid Sterba extent_submit_bio_start_t *submit_bio_start) 80344b8bd7eSChris Mason { 80444b8bd7eSChris Mason struct async_submit_bio *async; 80544b8bd7eSChris Mason 80644b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 80744b8bd7eSChris Mason if (!async) 8084e4cbee9SChristoph Hellwig return BLK_STS_RESOURCE; 80944b8bd7eSChris Mason 810c6100a4bSJosef Bacik async->private_data = private_data; 81144b8bd7eSChris Mason async->bio = bio; 81244b8bd7eSChris Mason async->mirror_num = mirror_num; 8134a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8144a69a410SChris Mason 815a0cac0ecSOmar Sandoval btrfs_init_work(&async->work, run_one_async_start, run_one_async_done, 816a0cac0ecSOmar Sandoval run_one_async_free); 8174a69a410SChris Mason 818eaf25d93SChris Mason async->bio_offset = bio_offset; 8198c8bee1dSChris Mason 8204e4cbee9SChristoph Hellwig async->status = 0; 82179787eaaSJeff Mahoney 82267f055c7SChristoph Hellwig if (op_is_sync(bio->bi_opf)) 8235cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 824d313d7a3SChris Mason 8255cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 82644b8bd7eSChris Mason return 0; 82744b8bd7eSChris Mason } 82844b8bd7eSChris Mason 8294e4cbee9SChristoph Hellwig static blk_status_t btree_csum_one_bio(struct bio *bio) 830ce3ed71aSChris Mason { 8312c30c71bSKent Overstreet struct bio_vec *bvec; 832ce3ed71aSChris Mason struct btrfs_root *root; 8332b070cfeSChristoph Hellwig int ret = 0; 8346dc4f100SMing Lei struct bvec_iter_all iter_all; 835ce3ed71aSChris Mason 836c09abff8SDavid Sterba ASSERT(!bio_flagged(bio, BIO_CLONED)); 8372b070cfeSChristoph Hellwig bio_for_each_segment_all(bvec, bio, iter_all) { 838ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 83901d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 84079787eaaSJeff Mahoney if (ret) 84179787eaaSJeff Mahoney break; 842ce3ed71aSChris Mason } 8432c30c71bSKent Overstreet 8444e4cbee9SChristoph Hellwig return errno_to_blk_status(ret); 845ce3ed71aSChris Mason } 846ce3ed71aSChris Mason 847d0ee3934SDavid Sterba static blk_status_t btree_submit_bio_start(void *private_data, struct bio *bio, 848eaf25d93SChris Mason u64 bio_offset) 84922c59948SChris Mason { 8508b712842SChris Mason /* 8518b712842SChris Mason * when we're called for a write, we're already in the async 8525443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8538b712842SChris Mason */ 85479787eaaSJeff Mahoney return btree_csum_one_bio(bio); 85522c59948SChris Mason } 85622c59948SChris Mason 8579b4e675aSDavid Sterba static int check_async_write(struct btrfs_fs_info *fs_info, 8589b4e675aSDavid Sterba struct btrfs_inode *bi) 859de0022b9SJosef Bacik { 8606300463bSLiu Bo if (atomic_read(&bi->sync_writers)) 8616300463bSLiu Bo return 0; 8629b4e675aSDavid Sterba if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags)) 863de0022b9SJosef Bacik return 0; 864de0022b9SJosef Bacik return 1; 865de0022b9SJosef Bacik } 866de0022b9SJosef Bacik 867a56b1c7bSNikolay Borisov static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio, 86850489a57SNikolay Borisov int mirror_num, 86950489a57SNikolay Borisov unsigned long bio_flags) 87044b8bd7eSChris Mason { 8710b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); 8729b4e675aSDavid Sterba int async = check_async_write(fs_info, BTRFS_I(inode)); 8734e4cbee9SChristoph Hellwig blk_status_t ret; 874cad321adSChris Mason 87537226b21SMike Christie if (bio_op(bio) != REQ_OP_WRITE) { 876cad321adSChris Mason /* 877cad321adSChris Mason * called for a read, do the setup so that checksum validation 878cad321adSChris Mason * can happen in the async kernel threads 879cad321adSChris Mason */ 8800b246afaSJeff Mahoney ret = btrfs_bio_wq_end_io(fs_info, bio, 8810b246afaSJeff Mahoney BTRFS_WQ_ENDIO_METADATA); 8821d4284bdSChris Mason if (ret) 88361891923SStefan Behrens goto out_w_error; 88408635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 885de0022b9SJosef Bacik } else if (!async) { 886de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 887de0022b9SJosef Bacik if (ret) 88861891923SStefan Behrens goto out_w_error; 88908635baeSChris Mason ret = btrfs_map_bio(fs_info, bio, mirror_num); 89061891923SStefan Behrens } else { 891cad321adSChris Mason /* 89261891923SStefan Behrens * kthread helpers are used to submit writes so that 89361891923SStefan Behrens * checksumming can happen in parallel across all CPUs 894cad321adSChris Mason */ 895c6100a4bSJosef Bacik ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0, 896e68f2ee7SNikolay Borisov 0, inode, btree_submit_bio_start); 89744b8bd7eSChris Mason } 89844b8bd7eSChris Mason 8994246a0b6SChristoph Hellwig if (ret) 9004246a0b6SChristoph Hellwig goto out_w_error; 9014246a0b6SChristoph Hellwig return 0; 9024246a0b6SChristoph Hellwig 90361891923SStefan Behrens out_w_error: 9044e4cbee9SChristoph Hellwig bio->bi_status = ret; 9054246a0b6SChristoph Hellwig bio_endio(bio); 90661891923SStefan Behrens return ret; 90761891923SStefan Behrens } 90861891923SStefan Behrens 9093dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 910784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 911a6bc32b8SMel Gorman struct page *newpage, struct page *page, 912a6bc32b8SMel Gorman enum migrate_mode mode) 913784b4e29SChris Mason { 914784b4e29SChris Mason /* 915784b4e29SChris Mason * we can't safely write a btree page from here, 916784b4e29SChris Mason * we haven't done the locking hook 917784b4e29SChris Mason */ 918784b4e29SChris Mason if (PageDirty(page)) 919784b4e29SChris Mason return -EAGAIN; 920784b4e29SChris Mason /* 921784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 922784b4e29SChris Mason * We must have no buffers or drop them. 923784b4e29SChris Mason */ 924784b4e29SChris Mason if (page_has_private(page) && 925784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 926784b4e29SChris Mason return -EAGAIN; 927a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 928784b4e29SChris Mason } 9293dd1462eSJan Beulich #endif 930784b4e29SChris Mason 9310da5468fSChris Mason 9320da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9330da5468fSChris Mason struct writeback_control *wbc) 9340da5468fSChris Mason { 935e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 936e2d84521SMiao Xie int ret; 937e2d84521SMiao Xie 938d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 939448d640bSChris Mason 940448d640bSChris Mason if (wbc->for_kupdate) 941448d640bSChris Mason return 0; 942448d640bSChris Mason 943e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 944b9473439SChris Mason /* this is a bit racy, but that's ok */ 945d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 946d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 947d814a491SEthan Lien fs_info->dirty_metadata_batch); 948e2d84521SMiao Xie if (ret < 0) 949793955bcSChris Mason return 0; 950793955bcSChris Mason } 9510b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9520da5468fSChris Mason } 9530da5468fSChris Mason 954b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9555f39d397SChris Mason { 95671ad38b4SDavid Sterba return extent_read_full_page(page, btree_get_extent, 0); 9575f39d397SChris Mason } 9585f39d397SChris Mason 95970dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9605f39d397SChris Mason { 96198509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 96298509cfcSChris Mason return 0; 9630c4e538bSDavid Sterba 964f7a52a40SDavid Sterba return try_release_extent_buffer(page); 965d98237b3SChris Mason } 966d98237b3SChris Mason 967d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 968d47992f8SLukas Czerner unsigned int length) 969d98237b3SChris Mason { 970d1310b2eSChris Mason struct extent_io_tree *tree; 971d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9725f39d397SChris Mason extent_invalidatepage(tree, page, offset); 9735f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 9749ad6b7bcSChris Mason if (PagePrivate(page)) { 975efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 976efe120a0SFrank Holton "page private not zero on page %llu", 977efe120a0SFrank Holton (unsigned long long)page_offset(page)); 978d1b89bc0SGuoqing Jiang detach_page_private(page); 9799ad6b7bcSChris Mason } 980d98237b3SChris Mason } 981d98237b3SChris Mason 9820b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 9830b32f4bbSJosef Bacik { 984bb146eb2SJosef Bacik #ifdef DEBUG 9850b32f4bbSJosef Bacik struct extent_buffer *eb; 9860b32f4bbSJosef Bacik 9870b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 9880b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 9890b32f4bbSJosef Bacik BUG_ON(!eb); 9900b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 9910b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 9920b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 993bb146eb2SJosef Bacik #endif 9940b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 9950b32f4bbSJosef Bacik } 9960b32f4bbSJosef Bacik 9977f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 998d98237b3SChris Mason .readpage = btree_readpage, 9990da5468fSChris Mason .writepages = btree_writepages, 10005f39d397SChris Mason .releasepage = btree_releasepage, 10015f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10025a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1003784b4e29SChris Mason .migratepage = btree_migratepage, 10045a92bc88SChris Mason #endif 10050b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1006d98237b3SChris Mason }; 1007123abc88SChris Mason 10082ff7e61eSJeff Mahoney void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr) 1009090d1875SChris Mason { 10105f39d397SChris Mason struct extent_buffer *buf = NULL; 1011537f38f0SNikolay Borisov int ret; 1012090d1875SChris Mason 10132ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1014c871b0f2SLiu Bo if (IS_ERR(buf)) 10156197d86eSDavid Sterba return; 1016537f38f0SNikolay Borisov 1017c2ccfbc6SNikolay Borisov ret = read_extent_buffer_pages(buf, WAIT_NONE, 0); 1018537f38f0SNikolay Borisov if (ret < 0) 1019537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 1020537f38f0SNikolay Borisov else 10215f39d397SChris Mason free_extent_buffer(buf); 1022090d1875SChris Mason } 1023090d1875SChris Mason 10242ff7e61eSJeff Mahoney struct extent_buffer *btrfs_find_create_tree_block( 10252ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info, 10260308af44SDavid Sterba u64 bytenr) 10270999df54SChris Mason { 10280b246afaSJeff Mahoney if (btrfs_is_testing(fs_info)) 10290b246afaSJeff Mahoney return alloc_test_extent_buffer(fs_info, bytenr); 10300b246afaSJeff Mahoney return alloc_extent_buffer(fs_info, bytenr); 10310999df54SChris Mason } 10320999df54SChris Mason 1033581c1760SQu Wenruo /* 1034581c1760SQu Wenruo * Read tree block at logical address @bytenr and do variant basic but critical 1035581c1760SQu Wenruo * verification. 1036581c1760SQu Wenruo * 1037581c1760SQu Wenruo * @parent_transid: expected transid of this tree block, skip check if 0 1038581c1760SQu Wenruo * @level: expected level, mandatory check 1039581c1760SQu Wenruo * @first_key: expected key in slot 0, skip check if NULL 1040581c1760SQu Wenruo */ 10412ff7e61eSJeff Mahoney struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, 1042581c1760SQu Wenruo u64 parent_transid, int level, 1043581c1760SQu Wenruo struct btrfs_key *first_key) 1044e20d96d6SChris Mason { 10455f39d397SChris Mason struct extent_buffer *buf = NULL; 104619c00ddcSChris Mason int ret; 104719c00ddcSChris Mason 10482ff7e61eSJeff Mahoney buf = btrfs_find_create_tree_block(fs_info, bytenr); 1049c871b0f2SLiu Bo if (IS_ERR(buf)) 1050c871b0f2SLiu Bo return buf; 1051e4204dedSChris Mason 10525ab12d1fSDavid Sterba ret = btree_read_extent_buffer_pages(buf, parent_transid, 1053581c1760SQu Wenruo level, first_key); 10540f0fe8f7SFilipe David Borba Manana if (ret) { 1055537f38f0SNikolay Borisov free_extent_buffer_stale(buf); 105664c043deSLiu Bo return ERR_PTR(ret); 10570f0fe8f7SFilipe David Borba Manana } 10585f39d397SChris Mason return buf; 1059ce9adaa5SChris Mason 1060eb60ceacSChris Mason } 1061eb60ceacSChris Mason 10626a884d7dSDavid Sterba void btrfs_clean_tree_block(struct extent_buffer *buf) 1063ed2ff2cbSChris Mason { 10646a884d7dSDavid Sterba struct btrfs_fs_info *fs_info = buf->fs_info; 106555c69072SChris Mason if (btrfs_header_generation(buf) == 1066e2d84521SMiao Xie fs_info->running_transaction->transid) { 1067b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1068b4ce94deSChris Mason 1069b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1070104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 1071e2d84521SMiao Xie -buf->len, 1072e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1073b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 10748bead258SDavid Sterba btrfs_set_lock_blocking_write(buf); 10750b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1076925baeddSChris Mason } 10775f39d397SChris Mason } 1078ed7b63ebSJosef Bacik } 10795f39d397SChris Mason 1080da17066cSJeff Mahoney static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1081e20d96d6SChris Mason u64 objectid) 1082d97e63b6SChris Mason { 10837c0260eeSJeff Mahoney bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 108496dfcb46SJosef Bacik root->fs_info = fs_info; 1085cfaa7295SChris Mason root->node = NULL; 1086a28ec197SChris Mason root->commit_root = NULL; 108727cdeb70SMiao Xie root->state = 0; 1088d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 10890b86a832SChris Mason 10900f7d52f4SChris Mason root->last_trans = 0; 109113a8a7c8SYan, Zheng root->highest_objectid = 0; 1092eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1093199c2a9cSMiao Xie root->nr_ordered_extents = 0; 10946bef4d31SEric Paris root->inode_tree = RB_ROOT; 109516cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1096f0486c68SYan, Zheng root->block_rsv = NULL; 10970b86a832SChris Mason 10980b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 10995d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1100eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1101eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1102199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1103199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 1104d2311e69SQu Wenruo INIT_LIST_HEAD(&root->reloc_dirty_list); 11052ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11062ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 11075d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1108eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1109199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1110f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 11112ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 11122ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 11138287475aSQu Wenruo spin_lock_init(&root->qgroup_meta_rsv_lock); 1114a2135011SChris Mason mutex_init(&root->objectid_mutex); 1115e02119d5SChris Mason mutex_init(&root->log_mutex); 111631f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1117573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 1118c53e9653SQu Wenruo init_waitqueue_head(&root->qgroup_flush_wait); 11197237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 11207237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 11217237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 11228b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 11238b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 11247237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 11257237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 11267237f183SYan Zheng atomic_set(&root->log_writers, 0); 11272ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 11280700cea7SElena Reshetova refcount_set(&root->refs, 1); 11298ecebf4dSRobbie Ko atomic_set(&root->snapshot_force_cow, 0); 1130eede2bf3SOmar Sandoval atomic_set(&root->nr_swapfiles, 0); 11317237f183SYan Zheng root->log_transid = 0; 1132d1433debSMiao Xie root->log_transid_committed = -1; 1133257c62e1SChris Mason root->last_log_commit = 0; 1134e289f03eSFilipe Manana if (!dummy) { 113543eb5f29SQu Wenruo extent_io_tree_init(fs_info, &root->dirty_log_pages, 113643eb5f29SQu Wenruo IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL); 1137e289f03eSFilipe Manana extent_io_tree_init(fs_info, &root->log_csum_range, 1138e289f03eSFilipe Manana IO_TREE_LOG_CSUM_RANGE, NULL); 1139e289f03eSFilipe Manana } 1140017e5369SChris Mason 11413768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 11423768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 11436702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 11444d775673SChris Mason root->root_key.objectid = objectid; 11450ee5dc67SAl Viro root->anon_dev = 0; 11468ea05e3aSAlexander Block 11475f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 1148370a11b8SQu Wenruo btrfs_qgroup_init_swapped_blocks(&root->swapped_blocks); 1149bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 1150bd647ce3SJosef Bacik INIT_LIST_HEAD(&root->leak_list); 1151bd647ce3SJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 1152bd647ce3SJosef Bacik list_add_tail(&root->leak_list, &fs_info->allocated_roots); 1153bd647ce3SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 1154bd647ce3SJosef Bacik #endif 11553768f368SChris Mason } 11563768f368SChris Mason 115774e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 115896dfcb46SJosef Bacik u64 objectid, gfp_t flags) 11596f07e42eSAl Viro { 116074e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 11616f07e42eSAl Viro if (root) 116296dfcb46SJosef Bacik __setup_root(root, fs_info, objectid); 11636f07e42eSAl Viro return root; 11646f07e42eSAl Viro } 11656f07e42eSAl Viro 116606ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 116706ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 1168da17066cSJeff Mahoney struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info) 116906ea65a3SJosef Bacik { 117006ea65a3SJosef Bacik struct btrfs_root *root; 117106ea65a3SJosef Bacik 11727c0260eeSJeff Mahoney if (!fs_info) 11737c0260eeSJeff Mahoney return ERR_PTR(-EINVAL); 11747c0260eeSJeff Mahoney 117596dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, GFP_KERNEL); 117606ea65a3SJosef Bacik if (!root) 117706ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1178da17066cSJeff Mahoney 1179b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 1180faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 118106ea65a3SJosef Bacik 118206ea65a3SJosef Bacik return root; 118306ea65a3SJosef Bacik } 118406ea65a3SJosef Bacik #endif 118506ea65a3SJosef Bacik 118620897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 118720897f5cSArne Jansen u64 objectid) 118820897f5cSArne Jansen { 11899b7a2440SDavid Sterba struct btrfs_fs_info *fs_info = trans->fs_info; 119020897f5cSArne Jansen struct extent_buffer *leaf; 119120897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 119220897f5cSArne Jansen struct btrfs_root *root; 119320897f5cSArne Jansen struct btrfs_key key; 1194b89f6d1fSFilipe Manana unsigned int nofs_flag; 119520897f5cSArne Jansen int ret = 0; 119620897f5cSArne Jansen 1197b89f6d1fSFilipe Manana /* 1198b89f6d1fSFilipe Manana * We're holding a transaction handle, so use a NOFS memory allocation 1199b89f6d1fSFilipe Manana * context to avoid deadlock if reclaim happens. 1200b89f6d1fSFilipe Manana */ 1201b89f6d1fSFilipe Manana nofs_flag = memalloc_nofs_save(); 120296dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, objectid, GFP_KERNEL); 1203b89f6d1fSFilipe Manana memalloc_nofs_restore(nofs_flag); 120420897f5cSArne Jansen if (!root) 120520897f5cSArne Jansen return ERR_PTR(-ENOMEM); 120620897f5cSArne Jansen 120720897f5cSArne Jansen root->root_key.objectid = objectid; 120820897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 120920897f5cSArne Jansen root->root_key.offset = 0; 121020897f5cSArne Jansen 12114d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 121220897f5cSArne Jansen if (IS_ERR(leaf)) { 121320897f5cSArne Jansen ret = PTR_ERR(leaf); 12141dd05682STsutomu Itoh leaf = NULL; 121520897f5cSArne Jansen goto fail; 121620897f5cSArne Jansen } 121720897f5cSArne Jansen 121820897f5cSArne Jansen root->node = leaf; 121920897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 122020897f5cSArne Jansen 122120897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 122227cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 122320897f5cSArne Jansen 122420897f5cSArne Jansen root->root_item.flags = 0; 122520897f5cSArne Jansen root->root_item.byte_limit = 0; 122620897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 122720897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 122820897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 122920897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 123020897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 123120897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 123220897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 123333d85fdaSQu Wenruo if (is_fstree(objectid)) 1234807fc790SAndy Shevchenko generate_random_guid(root->root_item.uuid); 1235807fc790SAndy Shevchenko else 1236807fc790SAndy Shevchenko export_guid(root->root_item.uuid, &guid_null); 123720897f5cSArne Jansen root->root_item.drop_level = 0; 123820897f5cSArne Jansen 123920897f5cSArne Jansen key.objectid = objectid; 124020897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 124120897f5cSArne Jansen key.offset = 0; 124220897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 124320897f5cSArne Jansen if (ret) 124420897f5cSArne Jansen goto fail; 124520897f5cSArne Jansen 124620897f5cSArne Jansen btrfs_tree_unlock(leaf); 124720897f5cSArne Jansen 124820897f5cSArne Jansen return root; 12491dd05682STsutomu Itoh 12501dd05682STsutomu Itoh fail: 12518c38938cSJosef Bacik if (leaf) 12521dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 125300246528SJosef Bacik btrfs_put_root(root); 12541dd05682STsutomu Itoh 12551dd05682STsutomu Itoh return ERR_PTR(ret); 125620897f5cSArne Jansen } 125720897f5cSArne Jansen 12587237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1259e02119d5SChris Mason struct btrfs_fs_info *fs_info) 12600f7d52f4SChris Mason { 12610f7d52f4SChris Mason struct btrfs_root *root; 12627237f183SYan Zheng struct extent_buffer *leaf; 1263e02119d5SChris Mason 126496dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, GFP_NOFS); 1265e02119d5SChris Mason if (!root) 12667237f183SYan Zheng return ERR_PTR(-ENOMEM); 1267e02119d5SChris Mason 1268e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1269e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1270e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 127127cdeb70SMiao Xie 12727237f183SYan Zheng /* 127392a7cc42SQu Wenruo * DON'T set SHAREABLE bit for log trees. 127427cdeb70SMiao Xie * 127592a7cc42SQu Wenruo * Log trees are not exposed to user space thus can't be snapshotted, 127692a7cc42SQu Wenruo * and they go away before a real commit is actually done. 127792a7cc42SQu Wenruo * 127892a7cc42SQu Wenruo * They do store pointers to file data extents, and those reference 127992a7cc42SQu Wenruo * counts still get updated (along with back refs to the log tree). 12807237f183SYan Zheng */ 1281e02119d5SChris Mason 12824d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 12834d75f8a9SDavid Sterba NULL, 0, 0, 0); 12847237f183SYan Zheng if (IS_ERR(leaf)) { 128500246528SJosef Bacik btrfs_put_root(root); 12867237f183SYan Zheng return ERR_CAST(leaf); 12877237f183SYan Zheng } 1288e02119d5SChris Mason 12897237f183SYan Zheng root->node = leaf; 1290e02119d5SChris Mason 1291e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1292e02119d5SChris Mason btrfs_tree_unlock(root->node); 12937237f183SYan Zheng return root; 12947237f183SYan Zheng } 12957237f183SYan Zheng 12967237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 12977237f183SYan Zheng struct btrfs_fs_info *fs_info) 12987237f183SYan Zheng { 12997237f183SYan Zheng struct btrfs_root *log_root; 13007237f183SYan Zheng 13017237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 13027237f183SYan Zheng if (IS_ERR(log_root)) 13037237f183SYan Zheng return PTR_ERR(log_root); 13047237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 13057237f183SYan Zheng fs_info->log_root_tree = log_root; 13067237f183SYan Zheng return 0; 13077237f183SYan Zheng } 13087237f183SYan Zheng 13097237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 13107237f183SYan Zheng struct btrfs_root *root) 13117237f183SYan Zheng { 13120b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 13137237f183SYan Zheng struct btrfs_root *log_root; 13147237f183SYan Zheng struct btrfs_inode_item *inode_item; 13157237f183SYan Zheng 13160b246afaSJeff Mahoney log_root = alloc_log_tree(trans, fs_info); 13177237f183SYan Zheng if (IS_ERR(log_root)) 13187237f183SYan Zheng return PTR_ERR(log_root); 13197237f183SYan Zheng 13207237f183SYan Zheng log_root->last_trans = trans->transid; 13217237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 13227237f183SYan Zheng 13237237f183SYan Zheng inode_item = &log_root->root_item.inode; 13243cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 13253cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 13263cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1327da17066cSJeff Mahoney btrfs_set_stack_inode_nbytes(inode_item, 13280b246afaSJeff Mahoney fs_info->nodesize); 13293cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 13307237f183SYan Zheng 13315d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 13327237f183SYan Zheng 13337237f183SYan Zheng WARN_ON(root->log_root); 13347237f183SYan Zheng root->log_root = log_root; 13357237f183SYan Zheng root->log_transid = 0; 1336d1433debSMiao Xie root->log_transid_committed = -1; 1337257c62e1SChris Mason root->last_log_commit = 0; 1338e02119d5SChris Mason return 0; 1339e02119d5SChris Mason } 1340e02119d5SChris Mason 134162a2c73eSJosef Bacik struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1342cb517eabSMiao Xie struct btrfs_key *key) 1343e02119d5SChris Mason { 1344e02119d5SChris Mason struct btrfs_root *root; 1345e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 13460f7d52f4SChris Mason struct btrfs_path *path; 134784234f3aSYan Zheng u64 generation; 1348cb517eabSMiao Xie int ret; 1349581c1760SQu Wenruo int level; 1350cb517eabSMiao Xie 1351cb517eabSMiao Xie path = btrfs_alloc_path(); 1352cb517eabSMiao Xie if (!path) 1353cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 13540f7d52f4SChris Mason 135596dfcb46SJosef Bacik root = btrfs_alloc_root(fs_info, key->objectid, GFP_NOFS); 1356cb517eabSMiao Xie if (!root) { 1357cb517eabSMiao Xie ret = -ENOMEM; 1358cb517eabSMiao Xie goto alloc_fail; 13590f7d52f4SChris Mason } 13600f7d52f4SChris Mason 1361cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1362cb517eabSMiao Xie &root->root_item, &root->root_key); 13630f7d52f4SChris Mason if (ret) { 136413a8a7c8SYan, Zheng if (ret > 0) 136513a8a7c8SYan, Zheng ret = -ENOENT; 1366cb517eabSMiao Xie goto find_fail; 13670f7d52f4SChris Mason } 136813a8a7c8SYan, Zheng 136984234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1370581c1760SQu Wenruo level = btrfs_root_level(&root->root_item); 13712ff7e61eSJeff Mahoney root->node = read_tree_block(fs_info, 13722ff7e61eSJeff Mahoney btrfs_root_bytenr(&root->root_item), 1373581c1760SQu Wenruo generation, level, NULL); 137464c043deSLiu Bo if (IS_ERR(root->node)) { 137564c043deSLiu Bo ret = PTR_ERR(root->node); 13768c38938cSJosef Bacik root->node = NULL; 1377cb517eabSMiao Xie goto find_fail; 1378cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1379cb517eabSMiao Xie ret = -EIO; 138064c043deSLiu Bo goto find_fail; 1381416bc658SJosef Bacik } 13825d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 138313a8a7c8SYan, Zheng out: 1384cb517eabSMiao Xie btrfs_free_path(path); 1385cb517eabSMiao Xie return root; 1386cb517eabSMiao Xie 1387cb517eabSMiao Xie find_fail: 138800246528SJosef Bacik btrfs_put_root(root); 1389cb517eabSMiao Xie alloc_fail: 1390cb517eabSMiao Xie root = ERR_PTR(ret); 1391cb517eabSMiao Xie goto out; 1392cb517eabSMiao Xie } 1393cb517eabSMiao Xie 13942dfb1e43SQu Wenruo /* 13952dfb1e43SQu Wenruo * Initialize subvolume root in-memory structure 13962dfb1e43SQu Wenruo * 13972dfb1e43SQu Wenruo * @anon_dev: anonymous device to attach to the root, if zero, allocate new 13982dfb1e43SQu Wenruo */ 13992dfb1e43SQu Wenruo static int btrfs_init_fs_root(struct btrfs_root *root, dev_t anon_dev) 1400cb517eabSMiao Xie { 1401cb517eabSMiao Xie int ret; 1402dcc3eb96SNikolay Borisov unsigned int nofs_flag; 1403cb517eabSMiao Xie 1404cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1405cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1406cb517eabSMiao Xie GFP_NOFS); 1407cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1408cb517eabSMiao Xie ret = -ENOMEM; 1409cb517eabSMiao Xie goto fail; 1410cb517eabSMiao Xie } 1411cb517eabSMiao Xie 1412dcc3eb96SNikolay Borisov /* 1413dcc3eb96SNikolay Borisov * We might be called under a transaction (e.g. indirect backref 1414dcc3eb96SNikolay Borisov * resolution) which could deadlock if it triggers memory reclaim 1415dcc3eb96SNikolay Borisov */ 1416dcc3eb96SNikolay Borisov nofs_flag = memalloc_nofs_save(); 1417dcc3eb96SNikolay Borisov ret = btrfs_drew_lock_init(&root->snapshot_lock); 1418dcc3eb96SNikolay Borisov memalloc_nofs_restore(nofs_flag); 1419dcc3eb96SNikolay Borisov if (ret) 14208257b2dcSMiao Xie goto fail; 14218257b2dcSMiao Xie 1422aeb935a4SQu Wenruo if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID && 1423aeb935a4SQu Wenruo root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID) { 142492a7cc42SQu Wenruo set_bit(BTRFS_ROOT_SHAREABLE, &root->state); 1425f39e4571SJosef Bacik btrfs_check_and_init_root_item(&root->root_item); 1426f39e4571SJosef Bacik } 1427f39e4571SJosef Bacik 1428cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 142957cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 143057cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1431cb517eabSMiao Xie 1432851fd730SQu Wenruo /* 1433851fd730SQu Wenruo * Don't assign anonymous block device to roots that are not exposed to 1434851fd730SQu Wenruo * userspace, the id pool is limited to 1M 1435851fd730SQu Wenruo */ 1436851fd730SQu Wenruo if (is_fstree(root->root_key.objectid) && 1437851fd730SQu Wenruo btrfs_root_refs(&root->root_item) > 0) { 14382dfb1e43SQu Wenruo if (!anon_dev) { 1439cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1440cb517eabSMiao Xie if (ret) 1441876d2cf1SLiu Bo goto fail; 14422dfb1e43SQu Wenruo } else { 14432dfb1e43SQu Wenruo root->anon_dev = anon_dev; 14442dfb1e43SQu Wenruo } 1445851fd730SQu Wenruo } 1446f32e48e9SChandan Rajendra 1447f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1448f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1449f32e48e9SChandan Rajendra &root->highest_objectid); 1450f32e48e9SChandan Rajendra if (ret) { 1451f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1452876d2cf1SLiu Bo goto fail; 1453f32e48e9SChandan Rajendra } 1454f32e48e9SChandan Rajendra 1455f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1456f32e48e9SChandan Rajendra 1457f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1458f32e48e9SChandan Rajendra 1459cb517eabSMiao Xie return 0; 1460cb517eabSMiao Xie fail: 146184db5ccfSDavid Sterba /* The caller is responsible to call btrfs_free_fs_root */ 1462cb517eabSMiao Xie return ret; 1463cb517eabSMiao Xie } 1464cb517eabSMiao Xie 1465a98db0f3SJosef Bacik static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1466cb517eabSMiao Xie u64 root_id) 1467cb517eabSMiao Xie { 1468cb517eabSMiao Xie struct btrfs_root *root; 1469cb517eabSMiao Xie 1470cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1471cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1472cb517eabSMiao Xie (unsigned long)root_id); 1473bc44d7c4SJosef Bacik if (root) 147400246528SJosef Bacik root = btrfs_grab_root(root); 1475cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1476cb517eabSMiao Xie return root; 1477cb517eabSMiao Xie } 1478cb517eabSMiao Xie 1479cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1480cb517eabSMiao Xie struct btrfs_root *root) 1481cb517eabSMiao Xie { 1482cb517eabSMiao Xie int ret; 1483cb517eabSMiao Xie 1484e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1485cb517eabSMiao Xie if (ret) 1486cb517eabSMiao Xie return ret; 1487cb517eabSMiao Xie 1488cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1489cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1490cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1491cb517eabSMiao Xie root); 1492af01d2e5SJosef Bacik if (ret == 0) { 149300246528SJosef Bacik btrfs_grab_root(root); 149427cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1495af01d2e5SJosef Bacik } 1496cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1497cb517eabSMiao Xie radix_tree_preload_end(); 1498cb517eabSMiao Xie 1499cb517eabSMiao Xie return ret; 1500cb517eabSMiao Xie } 1501cb517eabSMiao Xie 1502bd647ce3SJosef Bacik void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info) 1503bd647ce3SJosef Bacik { 1504bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 1505bd647ce3SJosef Bacik struct btrfs_root *root; 1506bd647ce3SJosef Bacik 1507bd647ce3SJosef Bacik while (!list_empty(&fs_info->allocated_roots)) { 1508bd647ce3SJosef Bacik root = list_first_entry(&fs_info->allocated_roots, 1509bd647ce3SJosef Bacik struct btrfs_root, leak_list); 1510bd647ce3SJosef Bacik btrfs_err(fs_info, "leaked root %llu-%llu refcount %d", 1511bd647ce3SJosef Bacik root->root_key.objectid, root->root_key.offset, 1512bd647ce3SJosef Bacik refcount_read(&root->refs)); 1513bd647ce3SJosef Bacik while (refcount_read(&root->refs) > 1) 151400246528SJosef Bacik btrfs_put_root(root); 151500246528SJosef Bacik btrfs_put_root(root); 1516bd647ce3SJosef Bacik } 1517bd647ce3SJosef Bacik #endif 1518bd647ce3SJosef Bacik } 1519bd647ce3SJosef Bacik 15200d4b0463SJosef Bacik void btrfs_free_fs_info(struct btrfs_fs_info *fs_info) 15210d4b0463SJosef Bacik { 1522141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 1523141386e1SJosef Bacik percpu_counter_destroy(&fs_info->delalloc_bytes); 1524141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dio_bytes); 1525141386e1SJosef Bacik percpu_counter_destroy(&fs_info->dev_replace.bio_counter); 1526141386e1SJosef Bacik btrfs_free_csum_hash(fs_info); 1527141386e1SJosef Bacik btrfs_free_stripe_hash_table(fs_info); 1528141386e1SJosef Bacik btrfs_free_ref_cache(fs_info); 15290d4b0463SJosef Bacik kfree(fs_info->balance_ctl); 15300d4b0463SJosef Bacik kfree(fs_info->delayed_root); 153100246528SJosef Bacik btrfs_put_root(fs_info->extent_root); 153200246528SJosef Bacik btrfs_put_root(fs_info->tree_root); 153300246528SJosef Bacik btrfs_put_root(fs_info->chunk_root); 153400246528SJosef Bacik btrfs_put_root(fs_info->dev_root); 153500246528SJosef Bacik btrfs_put_root(fs_info->csum_root); 153600246528SJosef Bacik btrfs_put_root(fs_info->quota_root); 153700246528SJosef Bacik btrfs_put_root(fs_info->uuid_root); 153800246528SJosef Bacik btrfs_put_root(fs_info->free_space_root); 153900246528SJosef Bacik btrfs_put_root(fs_info->fs_root); 1540aeb935a4SQu Wenruo btrfs_put_root(fs_info->data_reloc_root); 1541bd647ce3SJosef Bacik btrfs_check_leaked_roots(fs_info); 15423fd63727SJosef Bacik btrfs_extent_buffer_leak_debug_check(fs_info); 15430d4b0463SJosef Bacik kfree(fs_info->super_copy); 15440d4b0463SJosef Bacik kfree(fs_info->super_for_commit); 15450d4b0463SJosef Bacik kvfree(fs_info); 15460d4b0463SJosef Bacik } 15470d4b0463SJosef Bacik 15480d4b0463SJosef Bacik 15492dfb1e43SQu Wenruo /* 15502dfb1e43SQu Wenruo * Get an in-memory reference of a root structure. 15512dfb1e43SQu Wenruo * 15522dfb1e43SQu Wenruo * For essential trees like root/extent tree, we grab it from fs_info directly. 15532dfb1e43SQu Wenruo * For subvolume trees, we check the cached filesystem roots first. If not 15542dfb1e43SQu Wenruo * found, then read it from disk and add it to cached fs roots. 15552dfb1e43SQu Wenruo * 15562dfb1e43SQu Wenruo * Caller should release the root by calling btrfs_put_root() after the usage. 15572dfb1e43SQu Wenruo * 15582dfb1e43SQu Wenruo * NOTE: Reloc and log trees can't be read by this function as they share the 15592dfb1e43SQu Wenruo * same root objectid. 15602dfb1e43SQu Wenruo * 15612dfb1e43SQu Wenruo * @objectid: root id 15622dfb1e43SQu Wenruo * @anon_dev: preallocated anonymous block device number for new roots, 15632dfb1e43SQu Wenruo * pass 0 for new allocation. 15642dfb1e43SQu Wenruo * @check_ref: whether to check root item references, If true, return -ENOENT 15652dfb1e43SQu Wenruo * for orphan roots 15662dfb1e43SQu Wenruo */ 15672dfb1e43SQu Wenruo static struct btrfs_root *btrfs_get_root_ref(struct btrfs_fs_info *fs_info, 15682dfb1e43SQu Wenruo u64 objectid, dev_t anon_dev, 15692dfb1e43SQu Wenruo bool check_ref) 15705eda7b5eSChris Mason { 15715eda7b5eSChris Mason struct btrfs_root *root; 1572381cf658SDavid Sterba struct btrfs_path *path; 15731d4c08e0SDavid Sterba struct btrfs_key key; 15745eda7b5eSChris Mason int ret; 15755eda7b5eSChris Mason 157656e9357aSDavid Sterba if (objectid == BTRFS_ROOT_TREE_OBJECTID) 157700246528SJosef Bacik return btrfs_grab_root(fs_info->tree_root); 157856e9357aSDavid Sterba if (objectid == BTRFS_EXTENT_TREE_OBJECTID) 157900246528SJosef Bacik return btrfs_grab_root(fs_info->extent_root); 158056e9357aSDavid Sterba if (objectid == BTRFS_CHUNK_TREE_OBJECTID) 158100246528SJosef Bacik return btrfs_grab_root(fs_info->chunk_root); 158256e9357aSDavid Sterba if (objectid == BTRFS_DEV_TREE_OBJECTID) 158300246528SJosef Bacik return btrfs_grab_root(fs_info->dev_root); 158456e9357aSDavid Sterba if (objectid == BTRFS_CSUM_TREE_OBJECTID) 158500246528SJosef Bacik return btrfs_grab_root(fs_info->csum_root); 158656e9357aSDavid Sterba if (objectid == BTRFS_QUOTA_TREE_OBJECTID) 158700246528SJosef Bacik return btrfs_grab_root(fs_info->quota_root) ? 1588bc44d7c4SJosef Bacik fs_info->quota_root : ERR_PTR(-ENOENT); 158956e9357aSDavid Sterba if (objectid == BTRFS_UUID_TREE_OBJECTID) 159000246528SJosef Bacik return btrfs_grab_root(fs_info->uuid_root) ? 1591bc44d7c4SJosef Bacik fs_info->uuid_root : ERR_PTR(-ENOENT); 159256e9357aSDavid Sterba if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 159300246528SJosef Bacik return btrfs_grab_root(fs_info->free_space_root) ? 1594bc44d7c4SJosef Bacik fs_info->free_space_root : ERR_PTR(-ENOENT); 15954df27c4dSYan, Zheng again: 159656e9357aSDavid Sterba root = btrfs_lookup_fs_root(fs_info, objectid); 159748475471SStefan Behrens if (root) { 15982dfb1e43SQu Wenruo /* Shouldn't get preallocated anon_dev for cached roots */ 15992dfb1e43SQu Wenruo ASSERT(!anon_dev); 1600bc44d7c4SJosef Bacik if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 160100246528SJosef Bacik btrfs_put_root(root); 160248475471SStefan Behrens return ERR_PTR(-ENOENT); 1603bc44d7c4SJosef Bacik } 16045eda7b5eSChris Mason return root; 160548475471SStefan Behrens } 16065eda7b5eSChris Mason 160756e9357aSDavid Sterba key.objectid = objectid; 160856e9357aSDavid Sterba key.type = BTRFS_ROOT_ITEM_KEY; 160956e9357aSDavid Sterba key.offset = (u64)-1; 161056e9357aSDavid Sterba root = btrfs_read_tree_root(fs_info->tree_root, &key); 16115eda7b5eSChris Mason if (IS_ERR(root)) 16125eda7b5eSChris Mason return root; 16133394e160SChris Mason 1614c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1615d68fc57bSYan, Zheng ret = -ENOENT; 1616d68fc57bSYan, Zheng goto fail; 1617d68fc57bSYan, Zheng } 1618d68fc57bSYan, Zheng 16192dfb1e43SQu Wenruo ret = btrfs_init_fs_root(root, anon_dev); 1620cb517eabSMiao Xie if (ret) 1621cb517eabSMiao Xie goto fail; 1622cb517eabSMiao Xie 1623381cf658SDavid Sterba path = btrfs_alloc_path(); 1624381cf658SDavid Sterba if (!path) { 1625381cf658SDavid Sterba ret = -ENOMEM; 1626381cf658SDavid Sterba goto fail; 1627381cf658SDavid Sterba } 16281d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 16291d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 163056e9357aSDavid Sterba key.offset = objectid; 16311d4c08e0SDavid Sterba 16321d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1633381cf658SDavid Sterba btrfs_free_path(path); 1634d68fc57bSYan, Zheng if (ret < 0) 1635d68fc57bSYan, Zheng goto fail; 1636d68fc57bSYan, Zheng if (ret == 0) 163727cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1638d68fc57bSYan, Zheng 1639cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 16400f7d52f4SChris Mason if (ret) { 164100246528SJosef Bacik btrfs_put_root(root); 16424785e24fSJosef Bacik if (ret == -EEXIST) 16434df27c4dSYan, Zheng goto again; 16444df27c4dSYan, Zheng goto fail; 16454df27c4dSYan, Zheng } 1646edbd8d4eSChris Mason return root; 16474df27c4dSYan, Zheng fail: 16488c38938cSJosef Bacik btrfs_put_root(root); 16494df27c4dSYan, Zheng return ERR_PTR(ret); 1650edbd8d4eSChris Mason } 1651edbd8d4eSChris Mason 16522dfb1e43SQu Wenruo /* 16532dfb1e43SQu Wenruo * Get in-memory reference of a root structure 16542dfb1e43SQu Wenruo * 16552dfb1e43SQu Wenruo * @objectid: tree objectid 16562dfb1e43SQu Wenruo * @check_ref: if set, verify that the tree exists and the item has at least 16572dfb1e43SQu Wenruo * one reference 16582dfb1e43SQu Wenruo */ 16592dfb1e43SQu Wenruo struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 16602dfb1e43SQu Wenruo u64 objectid, bool check_ref) 16612dfb1e43SQu Wenruo { 16622dfb1e43SQu Wenruo return btrfs_get_root_ref(fs_info, objectid, 0, check_ref); 16632dfb1e43SQu Wenruo } 16642dfb1e43SQu Wenruo 16652dfb1e43SQu Wenruo /* 16662dfb1e43SQu Wenruo * Get in-memory reference of a root structure, created as new, optionally pass 16672dfb1e43SQu Wenruo * the anonymous block device id 16682dfb1e43SQu Wenruo * 16692dfb1e43SQu Wenruo * @objectid: tree objectid 16702dfb1e43SQu Wenruo * @anon_dev: if zero, allocate a new anonymous block device or use the 16712dfb1e43SQu Wenruo * parameter value 16722dfb1e43SQu Wenruo */ 16732dfb1e43SQu Wenruo struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info, 16742dfb1e43SQu Wenruo u64 objectid, dev_t anon_dev) 16752dfb1e43SQu Wenruo { 16762dfb1e43SQu Wenruo return btrfs_get_root_ref(fs_info, objectid, anon_dev, true); 16772dfb1e43SQu Wenruo } 16782dfb1e43SQu Wenruo 16798b712842SChris Mason /* 16808b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16818b712842SChris Mason * functions. This is where read checksum verification actually happens 16828b712842SChris Mason */ 16838b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1684ce9adaa5SChris Mason { 1685ce9adaa5SChris Mason struct bio *bio; 168697eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1687ce9adaa5SChris Mason 168897eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1689ce9adaa5SChris Mason bio = end_io_wq->bio; 16908b712842SChris Mason 16914e4cbee9SChristoph Hellwig bio->bi_status = end_io_wq->status; 1692ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1693ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 16944246a0b6SChristoph Hellwig bio_endio(bio); 16959be490f1SOmar Sandoval kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 1696ce9adaa5SChris Mason } 169744b8bd7eSChris Mason 1698a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1699a74a4b97SChris Mason { 1700a74a4b97SChris Mason struct btrfs_root *root = arg; 17010b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1702d0278245SMiao Xie int again; 1703a74a4b97SChris Mason 1704d6fd0ae2SOmar Sandoval while (1) { 1705d0278245SMiao Xie again = 0; 17069d1a2a3aSDavid Sterba 1707fd340d0fSJosef Bacik set_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1708fd340d0fSJosef Bacik 1709d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 17102ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) 1711d0278245SMiao Xie goto sleep; 1712d0278245SMiao Xie 171390c711abSZygo Blaxell /* 171490c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 171590c711abSZygo Blaxell * before we have finished mounting the filesystem. 171690c711abSZygo Blaxell */ 17170b246afaSJeff Mahoney if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags)) 171890c711abSZygo Blaxell goto sleep; 171990c711abSZygo Blaxell 17200b246afaSJeff Mahoney if (!mutex_trylock(&fs_info->cleaner_mutex)) 1721d0278245SMiao Xie goto sleep; 1722d0278245SMiao Xie 1723dc7f370cSMiao Xie /* 1724dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1725dc7f370cSMiao Xie * during the above check and trylock. 1726dc7f370cSMiao Xie */ 17272ff7e61eSJeff Mahoney if (btrfs_need_cleaner_sleep(fs_info)) { 17280b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1729dc7f370cSMiao Xie goto sleep; 1730dc7f370cSMiao Xie } 1731dc7f370cSMiao Xie 17322ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 1733c2d6cb16SFilipe Manana 17349d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 17350b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 1736a74a4b97SChris Mason 1737d0278245SMiao Xie /* 173805323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 173905323cd1SMiao Xie * needn't do anything special here. 1740d0278245SMiao Xie */ 17410b246afaSJeff Mahoney btrfs_run_defrag_inodes(fs_info); 174267c5e7d4SFilipe Manana 174367c5e7d4SFilipe Manana /* 174467c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 174567c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 174667c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 174767c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 174867c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 174967c5e7d4SFilipe Manana * unused block groups. 175067c5e7d4SFilipe Manana */ 17510b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 1752d0278245SMiao Xie sleep: 1753fd340d0fSJosef Bacik clear_bit(BTRFS_FS_CLEANER_RUNNING, &fs_info->flags); 1754d6fd0ae2SOmar Sandoval if (kthread_should_park()) 1755d6fd0ae2SOmar Sandoval kthread_parkme(); 1756d6fd0ae2SOmar Sandoval if (kthread_should_stop()) 1757d6fd0ae2SOmar Sandoval return 0; 1758838fe188SJiri Kosina if (!again) { 1759a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 1760a74a4b97SChris Mason schedule(); 1761a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1762a74a4b97SChris Mason } 1763da288d28SFilipe Manana } 1764a74a4b97SChris Mason } 1765a74a4b97SChris Mason 1766a74a4b97SChris Mason static int transaction_kthread(void *arg) 1767a74a4b97SChris Mason { 1768a74a4b97SChris Mason struct btrfs_root *root = arg; 17690b246afaSJeff Mahoney struct btrfs_fs_info *fs_info = root->fs_info; 1770a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1771a74a4b97SChris Mason struct btrfs_transaction *cur; 17728929ecfaSYan, Zheng u64 transid; 1773a944442cSAllen Pais time64_t now; 1774a74a4b97SChris Mason unsigned long delay; 1775914b2007SJan Kara bool cannot_commit; 1776a74a4b97SChris Mason 1777a74a4b97SChris Mason do { 1778914b2007SJan Kara cannot_commit = false; 17790b246afaSJeff Mahoney delay = HZ * fs_info->commit_interval; 17800b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 1781a74a4b97SChris Mason 17820b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 17830b246afaSJeff Mahoney cur = fs_info->running_transaction; 1784a74a4b97SChris Mason if (!cur) { 17850b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1786a74a4b97SChris Mason goto sleep; 1787a74a4b97SChris Mason } 178831153d81SYan Zheng 1789afd48513SArnd Bergmann now = ktime_get_seconds(); 17903296bf56SQu Wenruo if (cur->state < TRANS_STATE_COMMIT_START && 17918b87dc17SDavid Sterba (now < cur->start_time || 17920b246afaSJeff Mahoney now - cur->start_time < fs_info->commit_interval)) { 17930b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 1794a74a4b97SChris Mason delay = HZ * 5; 1795a74a4b97SChris Mason goto sleep; 1796a74a4b97SChris Mason } 17978929ecfaSYan, Zheng transid = cur->transid; 17980b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 179956bec294SChris Mason 180079787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1801354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1802914b2007SJan Kara if (IS_ERR(trans)) { 1803354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1804914b2007SJan Kara cannot_commit = true; 180579787eaaSJeff Mahoney goto sleep; 1806914b2007SJan Kara } 18078929ecfaSYan, Zheng if (transid == trans->transid) { 18083a45bb20SJeff Mahoney btrfs_commit_transaction(trans); 18098929ecfaSYan, Zheng } else { 18103a45bb20SJeff Mahoney btrfs_end_transaction(trans); 18118929ecfaSYan, Zheng } 1812a74a4b97SChris Mason sleep: 18130b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 18140b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 1815a74a4b97SChris Mason 18164e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 18170b246afaSJeff Mahoney &fs_info->fs_state))) 18182ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 18198929ecfaSYan, Zheng if (!kthread_should_stop() && 18200b246afaSJeff Mahoney (!btrfs_transaction_blocked(fs_info) || 1821914b2007SJan Kara cannot_commit)) 1822bc5511d0SNikolay Borisov schedule_timeout_interruptible(delay); 1823a74a4b97SChris Mason } while (!kthread_should_stop()); 1824a74a4b97SChris Mason return 0; 1825a74a4b97SChris Mason } 1826a74a4b97SChris Mason 1827af31f5e5SChris Mason /* 182801f0f9daSNikolay Borisov * This will find the highest generation in the array of root backups. The 182901f0f9daSNikolay Borisov * index of the highest array is returned, or -EINVAL if we can't find 183001f0f9daSNikolay Borisov * anything. 1831af31f5e5SChris Mason * 1832af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1833af31f5e5SChris Mason * generation of the latest root in the array with the generation 1834af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1835af31f5e5SChris Mason */ 183601f0f9daSNikolay Borisov static int find_newest_super_backup(struct btrfs_fs_info *info) 1837af31f5e5SChris Mason { 183801f0f9daSNikolay Borisov const u64 newest_gen = btrfs_super_generation(info->super_copy); 1839af31f5e5SChris Mason u64 cur; 1840af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1841af31f5e5SChris Mason int i; 1842af31f5e5SChris Mason 1843af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1844af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1845af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1846af31f5e5SChris Mason if (cur == newest_gen) 184701f0f9daSNikolay Borisov return i; 1848af31f5e5SChris Mason } 1849af31f5e5SChris Mason 185001f0f9daSNikolay Borisov return -EINVAL; 1851af31f5e5SChris Mason } 1852af31f5e5SChris Mason 1853af31f5e5SChris Mason /* 1854af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1855af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1856af31f5e5SChris Mason * done 1857af31f5e5SChris Mason */ 1858af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1859af31f5e5SChris Mason { 18606ef108ddSNikolay Borisov const int next_backup = info->backup_root_index; 1861af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1862af31f5e5SChris Mason 1863af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1864af31f5e5SChris Mason 1865af31f5e5SChris Mason /* 1866af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1867af31f5e5SChris Mason * regardless of which ones we use today 1868af31f5e5SChris Mason */ 1869af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1870af31f5e5SChris Mason 1871af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1872af31f5e5SChris Mason 1873af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1874af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1875af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1876af31f5e5SChris Mason 1877af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1878af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1879af31f5e5SChris Mason 1880af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1881af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1882af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1883af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1884af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1885af31f5e5SChris Mason 1886af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1887af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1888af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1889af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1890af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1891af31f5e5SChris Mason 18927c7e82a7SChris Mason /* 18937c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18947c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18957c7e82a7SChris Mason */ 18967c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18977c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18987c7e82a7SChris Mason info->fs_root->node->start); 1899af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1900af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1901af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1902af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 19037c7e82a7SChris Mason } 1904af31f5e5SChris Mason 1905af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1906af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1907af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1908af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1909af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1910af31f5e5SChris Mason 1911af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1912af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1913af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1914af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1915af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1916af31f5e5SChris Mason 1917af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1918af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1919af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1920af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1921af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1922af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1923af31f5e5SChris Mason 1924af31f5e5SChris Mason /* 1925af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1926af31f5e5SChris Mason * for the next commit 1927af31f5e5SChris Mason */ 1928af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1929af31f5e5SChris Mason &info->super_for_commit->super_roots, 1930af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1931af31f5e5SChris Mason } 1932af31f5e5SChris Mason 1933af31f5e5SChris Mason /* 1934bd2336b2SNikolay Borisov * read_backup_root - Reads a backup root based on the passed priority. Prio 0 1935bd2336b2SNikolay Borisov * is the newest, prio 1/2/3 are 2nd newest/3rd newest/4th (oldest) backup roots 1936bd2336b2SNikolay Borisov * 1937bd2336b2SNikolay Borisov * fs_info - filesystem whose backup roots need to be read 1938bd2336b2SNikolay Borisov * priority - priority of backup root required 1939bd2336b2SNikolay Borisov * 1940bd2336b2SNikolay Borisov * Returns backup root index on success and -EINVAL otherwise. 1941bd2336b2SNikolay Borisov */ 1942bd2336b2SNikolay Borisov static int read_backup_root(struct btrfs_fs_info *fs_info, u8 priority) 1943bd2336b2SNikolay Borisov { 1944bd2336b2SNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 1945bd2336b2SNikolay Borisov struct btrfs_super_block *super = fs_info->super_copy; 1946bd2336b2SNikolay Borisov struct btrfs_root_backup *root_backup; 1947bd2336b2SNikolay Borisov 1948bd2336b2SNikolay Borisov if (priority < BTRFS_NUM_BACKUP_ROOTS && backup_index >= 0) { 1949bd2336b2SNikolay Borisov if (priority == 0) 1950bd2336b2SNikolay Borisov return backup_index; 1951bd2336b2SNikolay Borisov 1952bd2336b2SNikolay Borisov backup_index = backup_index + BTRFS_NUM_BACKUP_ROOTS - priority; 1953bd2336b2SNikolay Borisov backup_index %= BTRFS_NUM_BACKUP_ROOTS; 1954bd2336b2SNikolay Borisov } else { 1955bd2336b2SNikolay Borisov return -EINVAL; 1956bd2336b2SNikolay Borisov } 1957bd2336b2SNikolay Borisov 1958bd2336b2SNikolay Borisov root_backup = super->super_roots + backup_index; 1959bd2336b2SNikolay Borisov 1960bd2336b2SNikolay Borisov btrfs_set_super_generation(super, 1961bd2336b2SNikolay Borisov btrfs_backup_tree_root_gen(root_backup)); 1962bd2336b2SNikolay Borisov btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1963bd2336b2SNikolay Borisov btrfs_set_super_root_level(super, 1964bd2336b2SNikolay Borisov btrfs_backup_tree_root_level(root_backup)); 1965bd2336b2SNikolay Borisov btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1966bd2336b2SNikolay Borisov 1967bd2336b2SNikolay Borisov /* 1968bd2336b2SNikolay Borisov * Fixme: the total bytes and num_devices need to match or we should 1969bd2336b2SNikolay Borisov * need a fsck 1970bd2336b2SNikolay Borisov */ 1971bd2336b2SNikolay Borisov btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1972bd2336b2SNikolay Borisov btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1973bd2336b2SNikolay Borisov 1974bd2336b2SNikolay Borisov return backup_index; 1975bd2336b2SNikolay Borisov } 1976bd2336b2SNikolay Borisov 19777abadb64SLiu Bo /* helper to cleanup workers */ 19787abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 19797abadb64SLiu Bo { 1980dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 1981afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 19825cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 1983fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 1984fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 1985d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 1986fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 1987fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 19885b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 1989e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 1990736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 1991a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 1992fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 1993b0643e59SDennis Zhou if (fs_info->discard_ctl.discard_workers) 1994b0643e59SDennis Zhou destroy_workqueue(fs_info->discard_ctl.discard_workers); 1995a9b9477dSFilipe Manana /* 1996a9b9477dSFilipe Manana * Now that all other work queues are destroyed, we can safely destroy 1997a9b9477dSFilipe Manana * the queues used for metadata I/O, since tasks from those other work 1998a9b9477dSFilipe Manana * queues can do metadata I/O operations. 1999a9b9477dSFilipe Manana */ 2000a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_workers); 2001a9b9477dSFilipe Manana btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 20027abadb64SLiu Bo } 20037abadb64SLiu Bo 20042e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 20052e9f5954SRashika { 20062e9f5954SRashika if (root) { 20072e9f5954SRashika free_extent_buffer(root->node); 20082e9f5954SRashika free_extent_buffer(root->commit_root); 20092e9f5954SRashika root->node = NULL; 20102e9f5954SRashika root->commit_root = NULL; 20112e9f5954SRashika } 20122e9f5954SRashika } 20132e9f5954SRashika 2014af31f5e5SChris Mason /* helper to cleanup tree roots */ 20154273eaffSAnand Jain static void free_root_pointers(struct btrfs_fs_info *info, bool free_chunk_root) 2016af31f5e5SChris Mason { 20172e9f5954SRashika free_root_extent_buffers(info->tree_root); 2018655b09feSJosef Bacik 20192e9f5954SRashika free_root_extent_buffers(info->dev_root); 20202e9f5954SRashika free_root_extent_buffers(info->extent_root); 20212e9f5954SRashika free_root_extent_buffers(info->csum_root); 20222e9f5954SRashika free_root_extent_buffers(info->quota_root); 20232e9f5954SRashika free_root_extent_buffers(info->uuid_root); 20248c38938cSJosef Bacik free_root_extent_buffers(info->fs_root); 2025aeb935a4SQu Wenruo free_root_extent_buffers(info->data_reloc_root); 20264273eaffSAnand Jain if (free_chunk_root) 20272e9f5954SRashika free_root_extent_buffers(info->chunk_root); 202870f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 2029af31f5e5SChris Mason } 2030af31f5e5SChris Mason 20318c38938cSJosef Bacik void btrfs_put_root(struct btrfs_root *root) 20328c38938cSJosef Bacik { 20338c38938cSJosef Bacik if (!root) 20348c38938cSJosef Bacik return; 20358c38938cSJosef Bacik 20368c38938cSJosef Bacik if (refcount_dec_and_test(&root->refs)) { 20378c38938cSJosef Bacik WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 20381dae7e0eSQu Wenruo WARN_ON(test_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state)); 20398c38938cSJosef Bacik if (root->anon_dev) 20408c38938cSJosef Bacik free_anon_bdev(root->anon_dev); 20418c38938cSJosef Bacik btrfs_drew_lock_destroy(&root->snapshot_lock); 2042923eb523SJohannes Thumshirn free_root_extent_buffers(root); 20438c38938cSJosef Bacik kfree(root->free_ino_ctl); 20448c38938cSJosef Bacik kfree(root->free_ino_pinned); 20458c38938cSJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 20468c38938cSJosef Bacik spin_lock(&root->fs_info->fs_roots_radix_lock); 20478c38938cSJosef Bacik list_del_init(&root->leak_list); 20488c38938cSJosef Bacik spin_unlock(&root->fs_info->fs_roots_radix_lock); 20498c38938cSJosef Bacik #endif 20508c38938cSJosef Bacik kfree(root); 20518c38938cSJosef Bacik } 20528c38938cSJosef Bacik } 20538c38938cSJosef Bacik 2054faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 2055171f6537SJosef Bacik { 2056171f6537SJosef Bacik int ret; 2057171f6537SJosef Bacik struct btrfs_root *gang[8]; 2058171f6537SJosef Bacik int i; 2059171f6537SJosef Bacik 2060171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2061171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2062171f6537SJosef Bacik struct btrfs_root, root_list); 2063171f6537SJosef Bacik list_del(&gang[0]->root_list); 2064171f6537SJosef Bacik 20658c38938cSJosef Bacik if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) 2066cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 206700246528SJosef Bacik btrfs_put_root(gang[0]); 2068171f6537SJosef Bacik } 2069171f6537SJosef Bacik 2070171f6537SJosef Bacik while (1) { 2071171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2072171f6537SJosef Bacik (void **)gang, 0, 2073171f6537SJosef Bacik ARRAY_SIZE(gang)); 2074171f6537SJosef Bacik if (!ret) 2075171f6537SJosef Bacik break; 2076171f6537SJosef Bacik for (i = 0; i < ret; i++) 2077cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2078171f6537SJosef Bacik } 2079171f6537SJosef Bacik } 2080af31f5e5SChris Mason 2081638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2082638aa7edSEric Sandeen { 2083638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2084638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2085638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2086638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2087638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2088638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2089ff09c4caSAnand Jain refcount_set(&fs_info->scrub_workers_refcnt, 0); 2090638aa7edSEric Sandeen } 2091638aa7edSEric Sandeen 2092779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2093779a65a4SEric Sandeen { 2094779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2095779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2096779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2097779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2098779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2099779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2100779a65a4SEric Sandeen } 2101779a65a4SEric Sandeen 21026bccf3abSJeff Mahoney static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info) 2103f37938e0SEric Sandeen { 21042ff7e61eSJeff Mahoney struct inode *inode = fs_info->btree_inode; 21052ff7e61eSJeff Mahoney 21062ff7e61eSJeff Mahoney inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 21072ff7e61eSJeff Mahoney set_nlink(inode, 1); 2108f37938e0SEric Sandeen /* 2109f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2110f37938e0SEric Sandeen * the real end of the address space is determined by all of 2111f37938e0SEric Sandeen * the devices in the system 2112f37938e0SEric Sandeen */ 21132ff7e61eSJeff Mahoney inode->i_size = OFFSET_MAX; 21142ff7e61eSJeff Mahoney inode->i_mapping->a_ops = &btree_aops; 2115f37938e0SEric Sandeen 21162ff7e61eSJeff Mahoney RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node); 211743eb5f29SQu Wenruo extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree, 211843eb5f29SQu Wenruo IO_TREE_INODE_IO, inode); 21197b439738SDavid Sterba BTRFS_I(inode)->io_tree.track_uptodate = false; 21202ff7e61eSJeff Mahoney extent_map_tree_init(&BTRFS_I(inode)->extent_tree); 2121f37938e0SEric Sandeen 21222ff7e61eSJeff Mahoney BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops; 2123f37938e0SEric Sandeen 21245c8fd99fSJosef Bacik BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root); 21252ff7e61eSJeff Mahoney memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key)); 21262ff7e61eSJeff Mahoney set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags); 21272ff7e61eSJeff Mahoney btrfs_insert_inode_hash(inode); 2128f37938e0SEric Sandeen } 2129f37938e0SEric Sandeen 2130ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2131ad618368SEric Sandeen { 2132ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2133129827e3SDavid Sterba init_rwsem(&fs_info->dev_replace.rwsem); 21347f8d236aSDavid Sterba init_waitqueue_head(&fs_info->dev_replace.replace_wait); 2135ad618368SEric Sandeen } 2136ad618368SEric Sandeen 2137f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2138f9e92e40SEric Sandeen { 2139f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2140f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2141f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2142f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2143f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2144f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2145d2c609b8SJeff Mahoney fs_info->qgroup_rescan_running = false; 2146f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2147f9e92e40SEric Sandeen } 2148f9e92e40SEric Sandeen 21492a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 21502a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 21512a458198SEric Sandeen { 2152f7b885beSAnand Jain u32 max_active = fs_info->thread_pool_size; 21536f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 21542a458198SEric Sandeen 21552a458198SEric Sandeen fs_info->workers = 2156cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2157cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 21582a458198SEric Sandeen 21592a458198SEric Sandeen fs_info->delalloc_workers = 2160cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2161cb001095SJeff Mahoney flags, max_active, 2); 21622a458198SEric Sandeen 21632a458198SEric Sandeen fs_info->flush_workers = 2164cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2165cb001095SJeff Mahoney flags, max_active, 0); 21662a458198SEric Sandeen 21672a458198SEric Sandeen fs_info->caching_workers = 2168cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 21692a458198SEric Sandeen 21702a458198SEric Sandeen fs_info->fixup_workers = 2171cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 21722a458198SEric Sandeen 21732a458198SEric Sandeen /* 21742a458198SEric Sandeen * endios are largely parallel and should have a very 21752a458198SEric Sandeen * low idle thresh 21762a458198SEric Sandeen */ 21772a458198SEric Sandeen fs_info->endio_workers = 2178cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 21792a458198SEric Sandeen fs_info->endio_meta_workers = 2180cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2181cb001095SJeff Mahoney max_active, 4); 21822a458198SEric Sandeen fs_info->endio_meta_write_workers = 2183cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2184cb001095SJeff Mahoney max_active, 2); 21852a458198SEric Sandeen fs_info->endio_raid56_workers = 2186cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2187cb001095SJeff Mahoney max_active, 4); 21882a458198SEric Sandeen fs_info->rmw_workers = 2189cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 21902a458198SEric Sandeen fs_info->endio_write_workers = 2191cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2192cb001095SJeff Mahoney max_active, 2); 21932a458198SEric Sandeen fs_info->endio_freespace_worker = 2194cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2195cb001095SJeff Mahoney max_active, 0); 21962a458198SEric Sandeen fs_info->delayed_workers = 2197cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2198cb001095SJeff Mahoney max_active, 0); 21992a458198SEric Sandeen fs_info->readahead_workers = 2200cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2201cb001095SJeff Mahoney max_active, 2); 22022a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2203cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 2204b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers = 2205b0643e59SDennis Zhou alloc_workqueue("btrfs_discard", WQ_UNBOUND | WQ_FREEZABLE, 1); 22062a458198SEric Sandeen 22072a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 2208ba8a9d07SChris Mason fs_info->flush_workers && 22092a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 22102a458198SEric Sandeen fs_info->endio_meta_write_workers && 22112a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 22122a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 22132a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 22142a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 2215b0643e59SDennis Zhou fs_info->qgroup_rescan_workers && 2216b0643e59SDennis Zhou fs_info->discard_ctl.discard_workers)) { 22172a458198SEric Sandeen return -ENOMEM; 22182a458198SEric Sandeen } 22192a458198SEric Sandeen 22202a458198SEric Sandeen return 0; 22212a458198SEric Sandeen } 22222a458198SEric Sandeen 22236d97c6e3SJohannes Thumshirn static int btrfs_init_csum_hash(struct btrfs_fs_info *fs_info, u16 csum_type) 22246d97c6e3SJohannes Thumshirn { 22256d97c6e3SJohannes Thumshirn struct crypto_shash *csum_shash; 2226b4e967beSDavid Sterba const char *csum_driver = btrfs_super_csum_driver(csum_type); 22276d97c6e3SJohannes Thumshirn 2228b4e967beSDavid Sterba csum_shash = crypto_alloc_shash(csum_driver, 0, 0); 22296d97c6e3SJohannes Thumshirn 22306d97c6e3SJohannes Thumshirn if (IS_ERR(csum_shash)) { 22316d97c6e3SJohannes Thumshirn btrfs_err(fs_info, "error allocating %s hash for checksum", 2232b4e967beSDavid Sterba csum_driver); 22336d97c6e3SJohannes Thumshirn return PTR_ERR(csum_shash); 22346d97c6e3SJohannes Thumshirn } 22356d97c6e3SJohannes Thumshirn 22366d97c6e3SJohannes Thumshirn fs_info->csum_shash = csum_shash; 22376d97c6e3SJohannes Thumshirn 22386d97c6e3SJohannes Thumshirn return 0; 22396d97c6e3SJohannes Thumshirn } 22406d97c6e3SJohannes Thumshirn 224163443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 224263443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 224363443bf5SEric Sandeen { 224463443bf5SEric Sandeen int ret; 224563443bf5SEric Sandeen struct btrfs_root *log_tree_root; 224663443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 224763443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 2248581c1760SQu Wenruo int level = btrfs_super_log_root_level(disk_super); 224963443bf5SEric Sandeen 225063443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2251f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 225263443bf5SEric Sandeen return -EIO; 225363443bf5SEric Sandeen } 225463443bf5SEric Sandeen 225596dfcb46SJosef Bacik log_tree_root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, 225696dfcb46SJosef Bacik GFP_KERNEL); 225763443bf5SEric Sandeen if (!log_tree_root) 225863443bf5SEric Sandeen return -ENOMEM; 225963443bf5SEric Sandeen 22602ff7e61eSJeff Mahoney log_tree_root->node = read_tree_block(fs_info, bytenr, 2261581c1760SQu Wenruo fs_info->generation + 1, 2262581c1760SQu Wenruo level, NULL); 226364c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2264f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 22650eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 22668c38938cSJosef Bacik log_tree_root->node = NULL; 226700246528SJosef Bacik btrfs_put_root(log_tree_root); 22680eeff236SLiu Bo return ret; 226964c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2270f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 227100246528SJosef Bacik btrfs_put_root(log_tree_root); 227263443bf5SEric Sandeen return -EIO; 227363443bf5SEric Sandeen } 227463443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 227563443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 227663443bf5SEric Sandeen if (ret) { 22770b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 227863443bf5SEric Sandeen "Failed to recover log tree"); 227900246528SJosef Bacik btrfs_put_root(log_tree_root); 228063443bf5SEric Sandeen return ret; 228163443bf5SEric Sandeen } 228263443bf5SEric Sandeen 2283bc98a42cSDavid Howells if (sb_rdonly(fs_info->sb)) { 22846bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 228563443bf5SEric Sandeen if (ret) 228663443bf5SEric Sandeen return ret; 228763443bf5SEric Sandeen } 228863443bf5SEric Sandeen 228963443bf5SEric Sandeen return 0; 229063443bf5SEric Sandeen } 229163443bf5SEric Sandeen 22926bccf3abSJeff Mahoney static int btrfs_read_roots(struct btrfs_fs_info *fs_info) 22934bbcaa64SEric Sandeen { 22946bccf3abSJeff Mahoney struct btrfs_root *tree_root = fs_info->tree_root; 2295a4f3d2c4SDavid Sterba struct btrfs_root *root; 22964bbcaa64SEric Sandeen struct btrfs_key location; 22974bbcaa64SEric Sandeen int ret; 22984bbcaa64SEric Sandeen 22996bccf3abSJeff Mahoney BUG_ON(!fs_info->tree_root); 23006bccf3abSJeff Mahoney 23014bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 23024bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 23034bbcaa64SEric Sandeen location.offset = 0; 23044bbcaa64SEric Sandeen 2305a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2306f50f4353SLiu Bo if (IS_ERR(root)) { 2307f50f4353SLiu Bo ret = PTR_ERR(root); 2308f50f4353SLiu Bo goto out; 2309f50f4353SLiu Bo } 2310a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2311a4f3d2c4SDavid Sterba fs_info->extent_root = root; 23124bbcaa64SEric Sandeen 23134bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2314a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2315f50f4353SLiu Bo if (IS_ERR(root)) { 2316f50f4353SLiu Bo ret = PTR_ERR(root); 2317f50f4353SLiu Bo goto out; 2318f50f4353SLiu Bo } 2319a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2320a4f3d2c4SDavid Sterba fs_info->dev_root = root; 23214bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 23224bbcaa64SEric Sandeen 23234bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2324a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2325f50f4353SLiu Bo if (IS_ERR(root)) { 2326f50f4353SLiu Bo ret = PTR_ERR(root); 2327f50f4353SLiu Bo goto out; 2328f50f4353SLiu Bo } 2329a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2330a4f3d2c4SDavid Sterba fs_info->csum_root = root; 23314bbcaa64SEric Sandeen 2332aeb935a4SQu Wenruo /* 2333aeb935a4SQu Wenruo * This tree can share blocks with some other fs tree during relocation 2334aeb935a4SQu Wenruo * and we need a proper setup by btrfs_get_fs_root 2335aeb935a4SQu Wenruo */ 233656e9357aSDavid Sterba root = btrfs_get_fs_root(tree_root->fs_info, 233756e9357aSDavid Sterba BTRFS_DATA_RELOC_TREE_OBJECTID, true); 2338aeb935a4SQu Wenruo if (IS_ERR(root)) { 2339aeb935a4SQu Wenruo ret = PTR_ERR(root); 2340aeb935a4SQu Wenruo goto out; 2341aeb935a4SQu Wenruo } 2342aeb935a4SQu Wenruo set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2343aeb935a4SQu Wenruo fs_info->data_reloc_root = root; 2344aeb935a4SQu Wenruo 23454bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2346a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2347a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2348a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2349afcdd129SJosef Bacik set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); 2350a4f3d2c4SDavid Sterba fs_info->quota_root = root; 23514bbcaa64SEric Sandeen } 23524bbcaa64SEric Sandeen 23534bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2354a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2355a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2356a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 23574bbcaa64SEric Sandeen if (ret != -ENOENT) 2358f50f4353SLiu Bo goto out; 23594bbcaa64SEric Sandeen } else { 2360a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2361a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 23624bbcaa64SEric Sandeen } 23634bbcaa64SEric Sandeen 236470f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 236570f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 236670f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 2367f50f4353SLiu Bo if (IS_ERR(root)) { 2368f50f4353SLiu Bo ret = PTR_ERR(root); 2369f50f4353SLiu Bo goto out; 2370f50f4353SLiu Bo } 237170f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 237270f6d82eSOmar Sandoval fs_info->free_space_root = root; 237370f6d82eSOmar Sandoval } 237470f6d82eSOmar Sandoval 23754bbcaa64SEric Sandeen return 0; 2376f50f4353SLiu Bo out: 2377f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read root (objectid=%llu): %d", 2378f50f4353SLiu Bo location.objectid, ret); 2379f50f4353SLiu Bo return ret; 23804bbcaa64SEric Sandeen } 23814bbcaa64SEric Sandeen 2382069ec957SQu Wenruo /* 2383069ec957SQu Wenruo * Real super block validation 2384069ec957SQu Wenruo * NOTE: super csum type and incompat features will not be checked here. 2385069ec957SQu Wenruo * 2386069ec957SQu Wenruo * @sb: super block to check 2387069ec957SQu Wenruo * @mirror_num: the super block number to check its bytenr: 2388069ec957SQu Wenruo * 0 the primary (1st) sb 2389069ec957SQu Wenruo * 1, 2 2nd and 3rd backup copy 2390069ec957SQu Wenruo * -1 skip bytenr check 2391069ec957SQu Wenruo */ 2392069ec957SQu Wenruo static int validate_super(struct btrfs_fs_info *fs_info, 2393069ec957SQu Wenruo struct btrfs_super_block *sb, int mirror_num) 239421a852b0SQu Wenruo { 239521a852b0SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 239621a852b0SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 239721a852b0SQu Wenruo int ret = 0; 239821a852b0SQu Wenruo 239921a852b0SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 240021a852b0SQu Wenruo btrfs_err(fs_info, "no valid FS found"); 240121a852b0SQu Wenruo ret = -EINVAL; 240221a852b0SQu Wenruo } 240321a852b0SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) { 240421a852b0SQu Wenruo btrfs_err(fs_info, "unrecognized or unsupported super flag: %llu", 240521a852b0SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 240621a852b0SQu Wenruo ret = -EINVAL; 240721a852b0SQu Wenruo } 240821a852b0SQu Wenruo if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 240921a852b0SQu Wenruo btrfs_err(fs_info, "tree_root level too big: %d >= %d", 241021a852b0SQu Wenruo btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 241121a852b0SQu Wenruo ret = -EINVAL; 241221a852b0SQu Wenruo } 241321a852b0SQu Wenruo if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 241421a852b0SQu Wenruo btrfs_err(fs_info, "chunk_root level too big: %d >= %d", 241521a852b0SQu Wenruo btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 241621a852b0SQu Wenruo ret = -EINVAL; 241721a852b0SQu Wenruo } 241821a852b0SQu Wenruo if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 241921a852b0SQu Wenruo btrfs_err(fs_info, "log_root level too big: %d >= %d", 242021a852b0SQu Wenruo btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 242121a852b0SQu Wenruo ret = -EINVAL; 242221a852b0SQu Wenruo } 242321a852b0SQu Wenruo 242421a852b0SQu Wenruo /* 242521a852b0SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 242621a852b0SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 242721a852b0SQu Wenruo */ 242821a852b0SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 242921a852b0SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 243021a852b0SQu Wenruo btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); 243121a852b0SQu Wenruo ret = -EINVAL; 243221a852b0SQu Wenruo } 243321a852b0SQu Wenruo /* Only PAGE SIZE is supported yet */ 243421a852b0SQu Wenruo if (sectorsize != PAGE_SIZE) { 243521a852b0SQu Wenruo btrfs_err(fs_info, 243621a852b0SQu Wenruo "sectorsize %llu not supported yet, only support %lu", 243721a852b0SQu Wenruo sectorsize, PAGE_SIZE); 243821a852b0SQu Wenruo ret = -EINVAL; 243921a852b0SQu Wenruo } 244021a852b0SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 244121a852b0SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 244221a852b0SQu Wenruo btrfs_err(fs_info, "invalid nodesize %llu", nodesize); 244321a852b0SQu Wenruo ret = -EINVAL; 244421a852b0SQu Wenruo } 244521a852b0SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 244621a852b0SQu Wenruo btrfs_err(fs_info, "invalid leafsize %u, should be %llu", 244721a852b0SQu Wenruo le32_to_cpu(sb->__unused_leafsize), nodesize); 244821a852b0SQu Wenruo ret = -EINVAL; 244921a852b0SQu Wenruo } 245021a852b0SQu Wenruo 245121a852b0SQu Wenruo /* Root alignment check */ 245221a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 245321a852b0SQu Wenruo btrfs_warn(fs_info, "tree_root block unaligned: %llu", 245421a852b0SQu Wenruo btrfs_super_root(sb)); 245521a852b0SQu Wenruo ret = -EINVAL; 245621a852b0SQu Wenruo } 245721a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 245821a852b0SQu Wenruo btrfs_warn(fs_info, "chunk_root block unaligned: %llu", 245921a852b0SQu Wenruo btrfs_super_chunk_root(sb)); 246021a852b0SQu Wenruo ret = -EINVAL; 246121a852b0SQu Wenruo } 246221a852b0SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 246321a852b0SQu Wenruo btrfs_warn(fs_info, "log_root block unaligned: %llu", 246421a852b0SQu Wenruo btrfs_super_log_root(sb)); 246521a852b0SQu Wenruo ret = -EINVAL; 246621a852b0SQu Wenruo } 246721a852b0SQu Wenruo 2468de37aa51SNikolay Borisov if (memcmp(fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid, 24697239ff4bSNikolay Borisov BTRFS_FSID_SIZE) != 0) { 247021a852b0SQu Wenruo btrfs_err(fs_info, 24717239ff4bSNikolay Borisov "dev_item UUID does not match metadata fsid: %pU != %pU", 2472de37aa51SNikolay Borisov fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid); 247321a852b0SQu Wenruo ret = -EINVAL; 247421a852b0SQu Wenruo } 247521a852b0SQu Wenruo 247621a852b0SQu Wenruo /* 247721a852b0SQu Wenruo * Hint to catch really bogus numbers, bitflips or so, more exact checks are 247821a852b0SQu Wenruo * done later 247921a852b0SQu Wenruo */ 248021a852b0SQu Wenruo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 248121a852b0SQu Wenruo btrfs_err(fs_info, "bytes_used is too small %llu", 248221a852b0SQu Wenruo btrfs_super_bytes_used(sb)); 248321a852b0SQu Wenruo ret = -EINVAL; 248421a852b0SQu Wenruo } 248521a852b0SQu Wenruo if (!is_power_of_2(btrfs_super_stripesize(sb))) { 248621a852b0SQu Wenruo btrfs_err(fs_info, "invalid stripesize %u", 248721a852b0SQu Wenruo btrfs_super_stripesize(sb)); 248821a852b0SQu Wenruo ret = -EINVAL; 248921a852b0SQu Wenruo } 249021a852b0SQu Wenruo if (btrfs_super_num_devices(sb) > (1UL << 31)) 249121a852b0SQu Wenruo btrfs_warn(fs_info, "suspicious number of devices: %llu", 249221a852b0SQu Wenruo btrfs_super_num_devices(sb)); 249321a852b0SQu Wenruo if (btrfs_super_num_devices(sb) == 0) { 249421a852b0SQu Wenruo btrfs_err(fs_info, "number of devices is 0"); 249521a852b0SQu Wenruo ret = -EINVAL; 249621a852b0SQu Wenruo } 249721a852b0SQu Wenruo 2498069ec957SQu Wenruo if (mirror_num >= 0 && 2499069ec957SQu Wenruo btrfs_super_bytenr(sb) != btrfs_sb_offset(mirror_num)) { 250021a852b0SQu Wenruo btrfs_err(fs_info, "super offset mismatch %llu != %u", 250121a852b0SQu Wenruo btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 250221a852b0SQu Wenruo ret = -EINVAL; 250321a852b0SQu Wenruo } 250421a852b0SQu Wenruo 250521a852b0SQu Wenruo /* 250621a852b0SQu Wenruo * Obvious sys_chunk_array corruptions, it must hold at least one key 250721a852b0SQu Wenruo * and one chunk 250821a852b0SQu Wenruo */ 250921a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 251021a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too big %u > %u", 251121a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 251221a852b0SQu Wenruo BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 251321a852b0SQu Wenruo ret = -EINVAL; 251421a852b0SQu Wenruo } 251521a852b0SQu Wenruo if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 251621a852b0SQu Wenruo + sizeof(struct btrfs_chunk)) { 251721a852b0SQu Wenruo btrfs_err(fs_info, "system chunk array too small %u < %zu", 251821a852b0SQu Wenruo btrfs_super_sys_array_size(sb), 251921a852b0SQu Wenruo sizeof(struct btrfs_disk_key) 252021a852b0SQu Wenruo + sizeof(struct btrfs_chunk)); 252121a852b0SQu Wenruo ret = -EINVAL; 252221a852b0SQu Wenruo } 252321a852b0SQu Wenruo 252421a852b0SQu Wenruo /* 252521a852b0SQu Wenruo * The generation is a global counter, we'll trust it more than the others 252621a852b0SQu Wenruo * but it's still possible that it's the one that's wrong. 252721a852b0SQu Wenruo */ 252821a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 252921a852b0SQu Wenruo btrfs_warn(fs_info, 253021a852b0SQu Wenruo "suspicious: generation < chunk_root_generation: %llu < %llu", 253121a852b0SQu Wenruo btrfs_super_generation(sb), 253221a852b0SQu Wenruo btrfs_super_chunk_root_generation(sb)); 253321a852b0SQu Wenruo if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 253421a852b0SQu Wenruo && btrfs_super_cache_generation(sb) != (u64)-1) 253521a852b0SQu Wenruo btrfs_warn(fs_info, 253621a852b0SQu Wenruo "suspicious: generation < cache_generation: %llu < %llu", 253721a852b0SQu Wenruo btrfs_super_generation(sb), 253821a852b0SQu Wenruo btrfs_super_cache_generation(sb)); 253921a852b0SQu Wenruo 254021a852b0SQu Wenruo return ret; 254121a852b0SQu Wenruo } 254221a852b0SQu Wenruo 2543069ec957SQu Wenruo /* 2544069ec957SQu Wenruo * Validation of super block at mount time. 2545069ec957SQu Wenruo * Some checks already done early at mount time, like csum type and incompat 2546069ec957SQu Wenruo * flags will be skipped. 2547069ec957SQu Wenruo */ 2548069ec957SQu Wenruo static int btrfs_validate_mount_super(struct btrfs_fs_info *fs_info) 2549069ec957SQu Wenruo { 2550069ec957SQu Wenruo return validate_super(fs_info, fs_info->super_copy, 0); 2551069ec957SQu Wenruo } 2552069ec957SQu Wenruo 255375cb857dSQu Wenruo /* 255475cb857dSQu Wenruo * Validation of super block at write time. 255575cb857dSQu Wenruo * Some checks like bytenr check will be skipped as their values will be 255675cb857dSQu Wenruo * overwritten soon. 255775cb857dSQu Wenruo * Extra checks like csum type and incompat flags will be done here. 255875cb857dSQu Wenruo */ 255975cb857dSQu Wenruo static int btrfs_validate_write_super(struct btrfs_fs_info *fs_info, 256075cb857dSQu Wenruo struct btrfs_super_block *sb) 256175cb857dSQu Wenruo { 256275cb857dSQu Wenruo int ret; 256375cb857dSQu Wenruo 256475cb857dSQu Wenruo ret = validate_super(fs_info, sb, -1); 256575cb857dSQu Wenruo if (ret < 0) 256675cb857dSQu Wenruo goto out; 2567e7e16f48SJohannes Thumshirn if (!btrfs_supported_super_csum(btrfs_super_csum_type(sb))) { 256875cb857dSQu Wenruo ret = -EUCLEAN; 256975cb857dSQu Wenruo btrfs_err(fs_info, "invalid csum type, has %u want %u", 257075cb857dSQu Wenruo btrfs_super_csum_type(sb), BTRFS_CSUM_TYPE_CRC32); 257175cb857dSQu Wenruo goto out; 257275cb857dSQu Wenruo } 257375cb857dSQu Wenruo if (btrfs_super_incompat_flags(sb) & ~BTRFS_FEATURE_INCOMPAT_SUPP) { 257475cb857dSQu Wenruo ret = -EUCLEAN; 257575cb857dSQu Wenruo btrfs_err(fs_info, 257675cb857dSQu Wenruo "invalid incompat flags, has 0x%llx valid mask 0x%llx", 257775cb857dSQu Wenruo btrfs_super_incompat_flags(sb), 257875cb857dSQu Wenruo (unsigned long long)BTRFS_FEATURE_INCOMPAT_SUPP); 257975cb857dSQu Wenruo goto out; 258075cb857dSQu Wenruo } 258175cb857dSQu Wenruo out: 258275cb857dSQu Wenruo if (ret < 0) 258375cb857dSQu Wenruo btrfs_err(fs_info, 258475cb857dSQu Wenruo "super block corruption detected before writing it to disk"); 258575cb857dSQu Wenruo return ret; 258675cb857dSQu Wenruo } 258775cb857dSQu Wenruo 25886ef108ddSNikolay Borisov static int __cold init_tree_roots(struct btrfs_fs_info *fs_info) 2589b8522a1eSNikolay Borisov { 25906ef108ddSNikolay Borisov int backup_index = find_newest_super_backup(fs_info); 2591b8522a1eSNikolay Borisov struct btrfs_super_block *sb = fs_info->super_copy; 2592b8522a1eSNikolay Borisov struct btrfs_root *tree_root = fs_info->tree_root; 2593b8522a1eSNikolay Borisov bool handle_error = false; 2594b8522a1eSNikolay Borisov int ret = 0; 2595b8522a1eSNikolay Borisov int i; 2596b8522a1eSNikolay Borisov 2597b8522a1eSNikolay Borisov for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 2598b8522a1eSNikolay Borisov u64 generation; 2599b8522a1eSNikolay Borisov int level; 2600b8522a1eSNikolay Borisov 2601b8522a1eSNikolay Borisov if (handle_error) { 2602b8522a1eSNikolay Borisov if (!IS_ERR(tree_root->node)) 2603b8522a1eSNikolay Borisov free_extent_buffer(tree_root->node); 2604b8522a1eSNikolay Borisov tree_root->node = NULL; 2605b8522a1eSNikolay Borisov 2606b8522a1eSNikolay Borisov if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) 2607b8522a1eSNikolay Borisov break; 2608b8522a1eSNikolay Borisov 2609b8522a1eSNikolay Borisov free_root_pointers(fs_info, 0); 2610b8522a1eSNikolay Borisov 2611b8522a1eSNikolay Borisov /* 2612b8522a1eSNikolay Borisov * Don't use the log in recovery mode, it won't be 2613b8522a1eSNikolay Borisov * valid 2614b8522a1eSNikolay Borisov */ 2615b8522a1eSNikolay Borisov btrfs_set_super_log_root(sb, 0); 2616b8522a1eSNikolay Borisov 2617b8522a1eSNikolay Borisov /* We can't trust the free space cache either */ 2618b8522a1eSNikolay Borisov btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2619b8522a1eSNikolay Borisov 2620b8522a1eSNikolay Borisov ret = read_backup_root(fs_info, i); 26216ef108ddSNikolay Borisov backup_index = ret; 2622b8522a1eSNikolay Borisov if (ret < 0) 2623b8522a1eSNikolay Borisov return ret; 2624b8522a1eSNikolay Borisov } 2625b8522a1eSNikolay Borisov generation = btrfs_super_generation(sb); 2626b8522a1eSNikolay Borisov level = btrfs_super_root_level(sb); 2627b8522a1eSNikolay Borisov tree_root->node = read_tree_block(fs_info, btrfs_super_root(sb), 2628b8522a1eSNikolay Borisov generation, level, NULL); 2629b8522a1eSNikolay Borisov if (IS_ERR(tree_root->node) || 2630b8522a1eSNikolay Borisov !extent_buffer_uptodate(tree_root->node)) { 2631b8522a1eSNikolay Borisov handle_error = true; 2632b8522a1eSNikolay Borisov 26330465337cSJosef Bacik if (IS_ERR(tree_root->node)) { 2634b8522a1eSNikolay Borisov ret = PTR_ERR(tree_root->node); 26350465337cSJosef Bacik tree_root->node = NULL; 26360465337cSJosef Bacik } else if (!extent_buffer_uptodate(tree_root->node)) { 2637b8522a1eSNikolay Borisov ret = -EUCLEAN; 26380465337cSJosef Bacik } 2639b8522a1eSNikolay Borisov 2640b8522a1eSNikolay Borisov btrfs_warn(fs_info, "failed to read tree root"); 2641b8522a1eSNikolay Borisov continue; 2642b8522a1eSNikolay Borisov } 2643b8522a1eSNikolay Borisov 2644b8522a1eSNikolay Borisov btrfs_set_root_node(&tree_root->root_item, tree_root->node); 2645b8522a1eSNikolay Borisov tree_root->commit_root = btrfs_root_node(tree_root); 2646b8522a1eSNikolay Borisov btrfs_set_root_refs(&tree_root->root_item, 1); 2647b8522a1eSNikolay Borisov 2648336a0d8dSNikolay Borisov /* 2649336a0d8dSNikolay Borisov * No need to hold btrfs_root::objectid_mutex since the fs 2650336a0d8dSNikolay Borisov * hasn't been fully initialised and we are the only user 2651336a0d8dSNikolay Borisov */ 2652b8522a1eSNikolay Borisov ret = btrfs_find_highest_objectid(tree_root, 2653b8522a1eSNikolay Borisov &tree_root->highest_objectid); 2654b8522a1eSNikolay Borisov if (ret < 0) { 2655b8522a1eSNikolay Borisov handle_error = true; 2656b8522a1eSNikolay Borisov continue; 2657b8522a1eSNikolay Borisov } 2658b8522a1eSNikolay Borisov 2659b8522a1eSNikolay Borisov ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2660b8522a1eSNikolay Borisov 2661b8522a1eSNikolay Borisov ret = btrfs_read_roots(fs_info); 2662b8522a1eSNikolay Borisov if (ret < 0) { 2663b8522a1eSNikolay Borisov handle_error = true; 2664b8522a1eSNikolay Borisov continue; 2665b8522a1eSNikolay Borisov } 2666b8522a1eSNikolay Borisov 2667b8522a1eSNikolay Borisov /* All successful */ 2668b8522a1eSNikolay Borisov fs_info->generation = generation; 2669b8522a1eSNikolay Borisov fs_info->last_trans_committed = generation; 26706ef108ddSNikolay Borisov 26716ef108ddSNikolay Borisov /* Always begin writing backup roots after the one being used */ 26726ef108ddSNikolay Borisov if (backup_index < 0) { 26736ef108ddSNikolay Borisov fs_info->backup_root_index = 0; 26746ef108ddSNikolay Borisov } else { 26756ef108ddSNikolay Borisov fs_info->backup_root_index = backup_index + 1; 26766ef108ddSNikolay Borisov fs_info->backup_root_index %= BTRFS_NUM_BACKUP_ROOTS; 26776ef108ddSNikolay Borisov } 2678b8522a1eSNikolay Borisov break; 2679b8522a1eSNikolay Borisov } 2680b8522a1eSNikolay Borisov 2681b8522a1eSNikolay Borisov return ret; 2682b8522a1eSNikolay Borisov } 2683b8522a1eSNikolay Borisov 26848260edbaSJosef Bacik void btrfs_init_fs_info(struct btrfs_fs_info *fs_info) 2685eb60ceacSChris Mason { 268676dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2687f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 26888fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2689facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 269024bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2691eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 269211833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2693eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2694a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 269576dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 269624bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 26974cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 2698ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2699f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 270047ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2701f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2702d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 270367c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 27047585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2705573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2706de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 270719c00ddcSChris Mason 27080b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 27096324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2710f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 271147ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 2712bd647ce3SJosef Bacik #ifdef CONFIG_BTRFS_DEBUG 2713bd647ce3SJosef Bacik INIT_LIST_HEAD(&fs_info->allocated_roots); 27143fd63727SJosef Bacik INIT_LIST_HEAD(&fs_info->allocated_ebs); 27153fd63727SJosef Bacik spin_lock_init(&fs_info->eb_leak_lock); 2716bd647ce3SJosef Bacik #endif 2717c8bf1b67SDavid Sterba extent_map_tree_init(&fs_info->mapping_tree); 271866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 271966d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 272066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 272166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 272266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 272366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 272466d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2725ba2c4d4eSJosef Bacik btrfs_init_block_rsv(&fs_info->delayed_refs_rsv, 2726ba2c4d4eSJosef Bacik BTRFS_BLOCK_RSV_DELREFS); 2727ba2c4d4eSJosef Bacik 2728771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 27294cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 27302fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2731034f784dSJosef Bacik atomic_set(&fs_info->nr_delayed_iputs, 0); 2732fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 273395ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 27349ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 27354cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2736a5ed45f8SNikolay Borisov atomic64_set(&fs_info->free_chunk_space, 0); 2737f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 27388b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2739f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 274090519d66SArne Jansen /* readahead state */ 2741d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 274290519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2743fd708b81SJosef Bacik btrfs_init_ref_verify(fs_info); 2744c8b97818SChris Mason 2745b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2746b34b086cSChris Mason num_online_cpus() + 2, 8); 27470afbaf8cSChris Mason 2748199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2749199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 275069fe2d75SJosef Bacik 2751638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 275221adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 275321adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 275421adbd5cSStefan Behrens #endif 2755779a65a4SEric Sandeen btrfs_init_balance(fs_info); 275657056740SJosef Bacik btrfs_init_async_reclaim_work(fs_info); 2757a2de733cSArne Jansen 27580f9dd46cSJosef Bacik spin_lock_init(&fs_info->block_group_cache_lock); 27596bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2760a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 27610f9dd46cSJosef Bacik 2762fe119a6eSNikolay Borisov extent_io_tree_init(fs_info, &fs_info->excluded_extents, 2763fe119a6eSNikolay Borisov IO_TREE_FS_EXCLUDED_EXTENTS, NULL); 2764afcdd129SJosef Bacik set_bit(BTRFS_FS_BARRIER, &fs_info->flags); 276539279cc3SChris Mason 27665a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 2767e02119d5SChris Mason mutex_init(&fs_info->tree_log_mutex); 2768925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2769a74a4b97SChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2770a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 27711bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 27729e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2773c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 277476dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2775803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2776fa9c0d79SChris Mason 2777ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2778f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2779b0643e59SDennis Zhou btrfs_discard_init(fs_info); 2780416ac51dSArne Jansen 2781fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2782fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2783fa9c0d79SChris Mason 2784e6dcd2dcSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 2785f9295749SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2786bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 27874854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 2788034f784dSJosef Bacik init_waitqueue_head(&fs_info->delayed_iputs_wait); 27893768f368SChris Mason 2790da17066cSJeff Mahoney /* Usable values until the real ones are cached from the superblock */ 2791da17066cSJeff Mahoney fs_info->nodesize = 4096; 2792da17066cSJeff Mahoney fs_info->sectorsize = 4096; 2793da17066cSJeff Mahoney fs_info->stripesize = 4096; 2794da17066cSJeff Mahoney 2795eede2bf3SOmar Sandoval spin_lock_init(&fs_info->swapfile_pins_lock); 2796eede2bf3SOmar Sandoval fs_info->swapfile_pins = RB_ROOT; 2797eede2bf3SOmar Sandoval 27989e967495SFilipe Manana fs_info->send_in_progress = 0; 27998260edbaSJosef Bacik } 28008260edbaSJosef Bacik 28018260edbaSJosef Bacik static int init_mount_fs_info(struct btrfs_fs_info *fs_info, struct super_block *sb) 28028260edbaSJosef Bacik { 28038260edbaSJosef Bacik int ret; 28048260edbaSJosef Bacik 28058260edbaSJosef Bacik fs_info->sb = sb; 28068260edbaSJosef Bacik sb->s_blocksize = BTRFS_BDEV_BLOCKSIZE; 28078260edbaSJosef Bacik sb->s_blocksize_bits = blksize_bits(BTRFS_BDEV_BLOCKSIZE); 28089e967495SFilipe Manana 2809c75e8394SJosef Bacik ret = percpu_counter_init(&fs_info->dio_bytes, 0, GFP_KERNEL); 2810ae18c37aSJosef Bacik if (ret) 2811ae18c37aSJosef Bacik return ret; 2812ae18c37aSJosef Bacik 2813ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 2814ae18c37aSJosef Bacik if (ret) 2815c75e8394SJosef Bacik return ret; 2816ae18c37aSJosef Bacik 2817ae18c37aSJosef Bacik fs_info->dirty_metadata_batch = PAGE_SIZE * 2818ae18c37aSJosef Bacik (1 + ilog2(nr_cpu_ids)); 2819ae18c37aSJosef Bacik 2820ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2821ae18c37aSJosef Bacik if (ret) 2822c75e8394SJosef Bacik return ret; 2823ae18c37aSJosef Bacik 2824ae18c37aSJosef Bacik ret = percpu_counter_init(&fs_info->dev_replace.bio_counter, 0, 2825ae18c37aSJosef Bacik GFP_KERNEL); 2826ae18c37aSJosef Bacik if (ret) 2827c75e8394SJosef Bacik return ret; 2828ae18c37aSJosef Bacik 2829ae18c37aSJosef Bacik fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 2830ae18c37aSJosef Bacik GFP_KERNEL); 2831c75e8394SJosef Bacik if (!fs_info->delayed_root) 2832c75e8394SJosef Bacik return -ENOMEM; 2833ae18c37aSJosef Bacik btrfs_init_delayed_root(fs_info->delayed_root); 2834ae18c37aSJosef Bacik 2835c75e8394SJosef Bacik return btrfs_alloc_stripe_hash_table(fs_info); 2836ae18c37aSJosef Bacik } 2837ae18c37aSJosef Bacik 283897f4dd09SNikolay Borisov static int btrfs_uuid_rescan_kthread(void *data) 283997f4dd09SNikolay Borisov { 284097f4dd09SNikolay Borisov struct btrfs_fs_info *fs_info = (struct btrfs_fs_info *)data; 284197f4dd09SNikolay Borisov int ret; 284297f4dd09SNikolay Borisov 284397f4dd09SNikolay Borisov /* 284497f4dd09SNikolay Borisov * 1st step is to iterate through the existing UUID tree and 284597f4dd09SNikolay Borisov * to delete all entries that contain outdated data. 284697f4dd09SNikolay Borisov * 2nd step is to add all missing entries to the UUID tree. 284797f4dd09SNikolay Borisov */ 284897f4dd09SNikolay Borisov ret = btrfs_uuid_tree_iterate(fs_info); 284997f4dd09SNikolay Borisov if (ret < 0) { 2850c94bec2cSJosef Bacik if (ret != -EINTR) 2851c94bec2cSJosef Bacik btrfs_warn(fs_info, "iterating uuid_tree failed %d", 2852c94bec2cSJosef Bacik ret); 285397f4dd09SNikolay Borisov up(&fs_info->uuid_tree_rescan_sem); 285497f4dd09SNikolay Borisov return ret; 285597f4dd09SNikolay Borisov } 285697f4dd09SNikolay Borisov return btrfs_uuid_scan_kthread(data); 285797f4dd09SNikolay Borisov } 285897f4dd09SNikolay Borisov 285997f4dd09SNikolay Borisov static int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info) 286097f4dd09SNikolay Borisov { 286197f4dd09SNikolay Borisov struct task_struct *task; 286297f4dd09SNikolay Borisov 286397f4dd09SNikolay Borisov down(&fs_info->uuid_tree_rescan_sem); 286497f4dd09SNikolay Borisov task = kthread_run(btrfs_uuid_rescan_kthread, fs_info, "btrfs-uuid"); 286597f4dd09SNikolay Borisov if (IS_ERR(task)) { 286697f4dd09SNikolay Borisov /* fs_info->update_uuid_tree_gen remains 0 in all error case */ 286797f4dd09SNikolay Borisov btrfs_warn(fs_info, "failed to start uuid_rescan task"); 286897f4dd09SNikolay Borisov up(&fs_info->uuid_tree_rescan_sem); 286997f4dd09SNikolay Borisov return PTR_ERR(task); 287097f4dd09SNikolay Borisov } 287197f4dd09SNikolay Borisov 287297f4dd09SNikolay Borisov return 0; 287397f4dd09SNikolay Borisov } 287497f4dd09SNikolay Borisov 2875ae18c37aSJosef Bacik int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices, 2876ae18c37aSJosef Bacik char *options) 2877ae18c37aSJosef Bacik { 2878ae18c37aSJosef Bacik u32 sectorsize; 2879ae18c37aSJosef Bacik u32 nodesize; 2880ae18c37aSJosef Bacik u32 stripesize; 2881ae18c37aSJosef Bacik u64 generation; 2882ae18c37aSJosef Bacik u64 features; 2883ae18c37aSJosef Bacik u16 csum_type; 2884ae18c37aSJosef Bacik struct btrfs_super_block *disk_super; 2885ae18c37aSJosef Bacik struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2886ae18c37aSJosef Bacik struct btrfs_root *tree_root; 2887ae18c37aSJosef Bacik struct btrfs_root *chunk_root; 2888ae18c37aSJosef Bacik int ret; 2889ae18c37aSJosef Bacik int err = -EINVAL; 2890ae18c37aSJosef Bacik int clear_free_space_tree = 0; 2891ae18c37aSJosef Bacik int level; 2892ae18c37aSJosef Bacik 28938260edbaSJosef Bacik ret = init_mount_fs_info(fs_info, sb); 289453b381b3SDavid Woodhouse if (ret) { 289583c8266aSDavid Sterba err = ret; 2896ae18c37aSJosef Bacik goto fail; 289753b381b3SDavid Woodhouse } 289853b381b3SDavid Woodhouse 2899ae18c37aSJosef Bacik /* These need to be init'ed before we start creating inodes and such. */ 2900ae18c37aSJosef Bacik tree_root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, 2901ae18c37aSJosef Bacik GFP_KERNEL); 2902ae18c37aSJosef Bacik fs_info->tree_root = tree_root; 2903ae18c37aSJosef Bacik chunk_root = btrfs_alloc_root(fs_info, BTRFS_CHUNK_TREE_OBJECTID, 2904ae18c37aSJosef Bacik GFP_KERNEL); 2905ae18c37aSJosef Bacik fs_info->chunk_root = chunk_root; 2906ae18c37aSJosef Bacik if (!tree_root || !chunk_root) { 2907ae18c37aSJosef Bacik err = -ENOMEM; 2908c75e8394SJosef Bacik goto fail; 2909ae18c37aSJosef Bacik } 2910ae18c37aSJosef Bacik 2911ae18c37aSJosef Bacik fs_info->btree_inode = new_inode(sb); 2912ae18c37aSJosef Bacik if (!fs_info->btree_inode) { 2913ae18c37aSJosef Bacik err = -ENOMEM; 2914c75e8394SJosef Bacik goto fail; 2915ae18c37aSJosef Bacik } 2916ae18c37aSJosef Bacik mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 2917ae18c37aSJosef Bacik btrfs_init_btree_inode(fs_info); 2918ae18c37aSJosef Bacik 29193c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 29201104a885SDavid Sterba 29211104a885SDavid Sterba /* 29221104a885SDavid Sterba * Read super block and check the signature bytes only 29231104a885SDavid Sterba */ 29248f32380dSJohannes Thumshirn disk_super = btrfs_read_dev_super(fs_devices->latest_bdev); 29258f32380dSJohannes Thumshirn if (IS_ERR(disk_super)) { 29268f32380dSJohannes Thumshirn err = PTR_ERR(disk_super); 292716cdcec7SMiao Xie goto fail_alloc; 292820b45077SDave Young } 292939279cc3SChris Mason 29301104a885SDavid Sterba /* 2931260db43cSRandy Dunlap * Verify the type first, if that or the checksum value are 29328dc3f22cSJohannes Thumshirn * corrupted, we'll find out 29338dc3f22cSJohannes Thumshirn */ 29348f32380dSJohannes Thumshirn csum_type = btrfs_super_csum_type(disk_super); 293551bce6c9SJohannes Thumshirn if (!btrfs_supported_super_csum(csum_type)) { 29368dc3f22cSJohannes Thumshirn btrfs_err(fs_info, "unsupported checksum algorithm: %u", 293751bce6c9SJohannes Thumshirn csum_type); 29388dc3f22cSJohannes Thumshirn err = -EINVAL; 29398f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29408dc3f22cSJohannes Thumshirn goto fail_alloc; 29418dc3f22cSJohannes Thumshirn } 29428dc3f22cSJohannes Thumshirn 29436d97c6e3SJohannes Thumshirn ret = btrfs_init_csum_hash(fs_info, csum_type); 29446d97c6e3SJohannes Thumshirn if (ret) { 29456d97c6e3SJohannes Thumshirn err = ret; 29468f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29476d97c6e3SJohannes Thumshirn goto fail_alloc; 29486d97c6e3SJohannes Thumshirn } 29496d97c6e3SJohannes Thumshirn 29508dc3f22cSJohannes Thumshirn /* 29511104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 29521104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 29531104a885SDavid Sterba */ 29548f32380dSJohannes Thumshirn if (btrfs_check_super_csum(fs_info, (u8 *)disk_super)) { 295505135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 29561104a885SDavid Sterba err = -EINVAL; 29578f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 2958141386e1SJosef Bacik goto fail_alloc; 29591104a885SDavid Sterba } 29601104a885SDavid Sterba 29611104a885SDavid Sterba /* 29621104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 29631104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 29641104a885SDavid Sterba * the whole block of INFO_SIZE 29651104a885SDavid Sterba */ 29668f32380dSJohannes Thumshirn memcpy(fs_info->super_copy, disk_super, sizeof(*fs_info->super_copy)); 29678f32380dSJohannes Thumshirn btrfs_release_disk_super(disk_super); 29685f39d397SChris Mason 2969fbc6feaeSNikolay Borisov disk_super = fs_info->super_copy; 2970fbc6feaeSNikolay Borisov 2971de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->fsid, fs_info->super_copy->fsid, 2972de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 2973de37aa51SNikolay Borisov 29747239ff4bSNikolay Borisov if (btrfs_fs_incompat(fs_info, METADATA_UUID)) { 2975de37aa51SNikolay Borisov ASSERT(!memcmp(fs_info->fs_devices->metadata_uuid, 2976de37aa51SNikolay Borisov fs_info->super_copy->metadata_uuid, 2977de37aa51SNikolay Borisov BTRFS_FSID_SIZE)); 29787239ff4bSNikolay Borisov } 29790b86a832SChris Mason 2980fbc6feaeSNikolay Borisov features = btrfs_super_flags(disk_super); 2981fbc6feaeSNikolay Borisov if (features & BTRFS_SUPER_FLAG_CHANGING_FSID_V2) { 2982fbc6feaeSNikolay Borisov features &= ~BTRFS_SUPER_FLAG_CHANGING_FSID_V2; 2983fbc6feaeSNikolay Borisov btrfs_set_super_flags(disk_super, features); 2984fbc6feaeSNikolay Borisov btrfs_info(fs_info, 2985fbc6feaeSNikolay Borisov "found metadata UUID change in progress flag, clearing"); 2986fbc6feaeSNikolay Borisov } 2987fbc6feaeSNikolay Borisov 2988fbc6feaeSNikolay Borisov memcpy(fs_info->super_for_commit, fs_info->super_copy, 2989fbc6feaeSNikolay Borisov sizeof(*fs_info->super_for_commit)); 2990de37aa51SNikolay Borisov 2991069ec957SQu Wenruo ret = btrfs_validate_mount_super(fs_info); 29921104a885SDavid Sterba if (ret) { 299305135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 29941104a885SDavid Sterba err = -EINVAL; 2995141386e1SJosef Bacik goto fail_alloc; 29961104a885SDavid Sterba } 29971104a885SDavid Sterba 29980f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 2999141386e1SJosef Bacik goto fail_alloc; 30000f7d52f4SChris Mason 3001acce952bSliubo /* check FS state, whether FS is broken. */ 300287533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 300387533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 3004acce952bSliubo 300575e7cb7fSLiu Bo /* 300675e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 300775e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 300875e7cb7fSLiu Bo */ 300975e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 301075e7cb7fSLiu Bo 30112ff7e61eSJeff Mahoney ret = btrfs_parse_options(fs_info, options, sb->s_flags); 30122b82032cSYan Zheng if (ret) { 30132b82032cSYan Zheng err = ret; 3014141386e1SJosef Bacik goto fail_alloc; 30152b82032cSYan Zheng } 3016dfe25020SChris Mason 3017f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 3018f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 3019f2b636e8SJosef Bacik if (features) { 302005135f59SDavid Sterba btrfs_err(fs_info, 302105135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 3022c1c9ff7cSGeert Uytterhoeven features); 3023f2b636e8SJosef Bacik err = -EINVAL; 3024141386e1SJosef Bacik goto fail_alloc; 3025f2b636e8SJosef Bacik } 3026f2b636e8SJosef Bacik 30275d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 30285d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 30290b246afaSJeff Mahoney if (fs_info->compress_type == BTRFS_COMPRESS_LZO) 3030a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 30315c1aab1dSNick Terrell else if (fs_info->compress_type == BTRFS_COMPRESS_ZSTD) 30325c1aab1dSNick Terrell features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD; 3033727011e0SChris Mason 30343173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 303505135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 30363173a18fSJosef Bacik 3037727011e0SChris Mason /* 3038727011e0SChris Mason * flag our filesystem as having big metadata blocks if 3039727011e0SChris Mason * they are bigger than the page size 3040727011e0SChris Mason */ 304109cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 3042727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 304305135f59SDavid Sterba btrfs_info(fs_info, 304405135f59SDavid Sterba "flagging fs with big metadata feature"); 3045727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 3046727011e0SChris Mason } 3047727011e0SChris Mason 3048bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 3049bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 3050b7f67055SChandan Rajendra stripesize = sectorsize; 3051707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 3052963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 3053bc3f116fSChris Mason 3054da17066cSJeff Mahoney /* Cache block sizes */ 3055da17066cSJeff Mahoney fs_info->nodesize = nodesize; 3056da17066cSJeff Mahoney fs_info->sectorsize = sectorsize; 3057da17066cSJeff Mahoney fs_info->stripesize = stripesize; 3058da17066cSJeff Mahoney 3059bc3f116fSChris Mason /* 3060bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 3061bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 3062bc3f116fSChris Mason */ 3063bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 3064707e8a07SDavid Sterba (sectorsize != nodesize)) { 306505135f59SDavid Sterba btrfs_err(fs_info, 306605135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 306705135f59SDavid Sterba nodesize, sectorsize); 3068141386e1SJosef Bacik goto fail_alloc; 3069bc3f116fSChris Mason } 3070bc3f116fSChris Mason 3071ceda0864SMiao Xie /* 3072ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 3073ceda0864SMiao Xie * update the flag. 3074ceda0864SMiao Xie */ 30755d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 30765d4f98a2SYan Zheng 3077f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 3078f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 3079bc98a42cSDavid Howells if (!sb_rdonly(sb) && features) { 308005135f59SDavid Sterba btrfs_err(fs_info, 308105135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 3082c1c9ff7cSGeert Uytterhoeven features); 3083f2b636e8SJosef Bacik err = -EINVAL; 3084141386e1SJosef Bacik goto fail_alloc; 3085f2b636e8SJosef Bacik } 308661d92c32SChris Mason 30872a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 30882a458198SEric Sandeen if (ret) { 30892a458198SEric Sandeen err = ret; 30900dc3b84aSJosef Bacik goto fail_sb_buffer; 30910dc3b84aSJosef Bacik } 30924543df7eSChris Mason 30939e11ceeeSJan Kara sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 3094b5420237SNikolay Borisov sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; 30959e11ceeeSJan Kara sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); 30969e11ceeeSJan Kara sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); 30974575c9ccSChris Mason 3098a061fc8dSChris Mason sb->s_blocksize = sectorsize; 3099a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 3100de37aa51SNikolay Borisov memcpy(&sb->s_uuid, fs_info->fs_devices->fsid, BTRFS_FSID_SIZE); 3101db94535dSChris Mason 3102925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 31036bccf3abSJeff Mahoney ret = btrfs_read_sys_array(fs_info); 3104925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 310584eed90fSChris Mason if (ret) { 310605135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 31075d4f98a2SYan Zheng goto fail_sb_buffer; 310884eed90fSChris Mason } 31090b86a832SChris Mason 311084234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 3111581c1760SQu Wenruo level = btrfs_super_chunk_root_level(disk_super); 31120b86a832SChris Mason 31132ff7e61eSJeff Mahoney chunk_root->node = read_tree_block(fs_info, 31140b86a832SChris Mason btrfs_super_chunk_root(disk_super), 3115581c1760SQu Wenruo generation, level, NULL); 311664c043deSLiu Bo if (IS_ERR(chunk_root->node) || 311764c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 311805135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 3119e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 3120e5fffbacSchandan free_extent_buffer(chunk_root->node); 312195ab1f64SZhao Lei chunk_root->node = NULL; 3122af31f5e5SChris Mason goto fail_tree_roots; 312383121942SDavid Woodhouse } 31245d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 31255d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 31260b86a832SChris Mason 3127e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 3128c4ac7541SDavid Sterba offsetof(struct btrfs_header, chunk_tree_uuid), 3129c4ac7541SDavid Sterba BTRFS_UUID_SIZE); 3130e17cade2SChris Mason 31315b4aacefSJeff Mahoney ret = btrfs_read_chunk_tree(fs_info); 31322b82032cSYan Zheng if (ret) { 313305135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 3134af31f5e5SChris Mason goto fail_tree_roots; 31352b82032cSYan Zheng } 31360b86a832SChris Mason 31378dabb742SStefan Behrens /* 31389b99b115SAnand Jain * Keep the devid that is marked to be the target device for the 31399b99b115SAnand Jain * device replace procedure 31408dabb742SStefan Behrens */ 31419b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 0); 3142dfe25020SChris Mason 3143a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 314405135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 3145a6b0d5c8SChris Mason goto fail_tree_roots; 3146a6b0d5c8SChris Mason } 3147a6b0d5c8SChris Mason 3148b8522a1eSNikolay Borisov ret = init_tree_roots(fs_info); 31494bbcaa64SEric Sandeen if (ret) 3150b8522a1eSNikolay Borisov goto fail_tree_roots; 31518929ecfaSYan, Zheng 315275ec1db8SJosef Bacik /* 315375ec1db8SJosef Bacik * If we have a uuid root and we're not being told to rescan we need to 315475ec1db8SJosef Bacik * check the generation here so we can set the 315575ec1db8SJosef Bacik * BTRFS_FS_UPDATE_UUID_TREE_GEN bit. Otherwise we could commit the 315675ec1db8SJosef Bacik * transaction during a balance or the log replay without updating the 315775ec1db8SJosef Bacik * uuid generation, and then if we crash we would rescan the uuid tree, 315875ec1db8SJosef Bacik * even though it was perfectly fine. 315975ec1db8SJosef Bacik */ 316075ec1db8SJosef Bacik if (fs_info->uuid_root && !btrfs_test_opt(fs_info, RESCAN_UUID_TREE) && 316175ec1db8SJosef Bacik fs_info->generation == btrfs_super_uuid_tree_generation(disk_super)) 316275ec1db8SJosef Bacik set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); 316375ec1db8SJosef Bacik 3164cf90d884SQu Wenruo ret = btrfs_verify_dev_extents(fs_info); 3165cf90d884SQu Wenruo if (ret) { 3166cf90d884SQu Wenruo btrfs_err(fs_info, 3167cf90d884SQu Wenruo "failed to verify dev extents against chunks: %d", 3168cf90d884SQu Wenruo ret); 3169cf90d884SQu Wenruo goto fail_block_groups; 3170cf90d884SQu Wenruo } 317168310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 317268310a5eSIlya Dryomov if (ret) { 317305135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 317468310a5eSIlya Dryomov goto fail_block_groups; 317568310a5eSIlya Dryomov } 317668310a5eSIlya Dryomov 3177733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 3178733f4fbbSStefan Behrens if (ret) { 317905135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 3180733f4fbbSStefan Behrens goto fail_block_groups; 3181733f4fbbSStefan Behrens } 3182733f4fbbSStefan Behrens 31838dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 31848dabb742SStefan Behrens if (ret) { 318505135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 31868dabb742SStefan Behrens goto fail_block_groups; 31878dabb742SStefan Behrens } 31888dabb742SStefan Behrens 31899b99b115SAnand Jain btrfs_free_extra_devids(fs_devices, 1); 31908dabb742SStefan Behrens 3191c6761a9eSAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices); 3192b7c35e81SAnand Jain if (ret) { 319305135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 319405135f59SDavid Sterba ret); 3195b7c35e81SAnand Jain goto fail_block_groups; 3196b7c35e81SAnand Jain } 3197b7c35e81SAnand Jain 319896f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 31995ac1d209SJeff Mahoney if (ret) { 320005135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 3201b7c35e81SAnand Jain goto fail_fsdev_sysfs; 32025ac1d209SJeff Mahoney } 32035ac1d209SJeff Mahoney 3204c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 3205c59021f8Sliubo if (ret) { 320605135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 32072365dd3cSAnand Jain goto fail_sysfs; 3208c59021f8Sliubo } 3209c59021f8Sliubo 32105b4aacefSJeff Mahoney ret = btrfs_read_block_groups(fs_info); 32111b1d1f66SJosef Bacik if (ret) { 321205135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 32132365dd3cSAnand Jain goto fail_sysfs; 32141b1d1f66SJosef Bacik } 32154330e183SQu Wenruo 32166528b99dSAnand Jain if (!sb_rdonly(sb) && !btrfs_check_rw_degradable(fs_info, NULL)) { 321705135f59SDavid Sterba btrfs_warn(fs_info, 321852042d8eSAndrea Gelmini "writable mount is not allowed due to too many missing devices"); 32192365dd3cSAnand Jain goto fail_sysfs; 3220292fd7fcSStefan Behrens } 32219078a3e1SChris Mason 3222a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3223a74a4b97SChris Mason "btrfs-cleaner"); 322457506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 32252365dd3cSAnand Jain goto fail_sysfs; 3226a74a4b97SChris Mason 3227a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3228a74a4b97SChris Mason tree_root, 3229a74a4b97SChris Mason "btrfs-transaction"); 323057506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 32313f157a2fSChris Mason goto fail_cleaner; 3232a74a4b97SChris Mason 3233583b7231SHans van Kranenburg if (!btrfs_test_opt(fs_info, NOSSD) && 3234c289811cSChris Mason !fs_info->fs_devices->rotating) { 3235583b7231SHans van Kranenburg btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations"); 3236c289811cSChris Mason } 3237c289811cSChris Mason 3238572d9ab7SDavid Sterba /* 323901327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3240572d9ab7SDavid Sterba * not have to wait for transaction commit 3241572d9ab7SDavid Sterba */ 3242572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 32433818aea2SQu Wenruo 324421adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 32450b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) { 32462ff7e61eSJeff Mahoney ret = btrfsic_mount(fs_info, fs_devices, 32470b246afaSJeff Mahoney btrfs_test_opt(fs_info, 324821adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 324921adbd5cSStefan Behrens 1 : 0, 325021adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 325121adbd5cSStefan Behrens if (ret) 325205135f59SDavid Sterba btrfs_warn(fs_info, 325305135f59SDavid Sterba "failed to initialize integrity check module: %d", 325405135f59SDavid Sterba ret); 325521adbd5cSStefan Behrens } 325621adbd5cSStefan Behrens #endif 3257bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3258bcef60f2SArne Jansen if (ret) 3259bcef60f2SArne Jansen goto fail_trans_kthread; 326021adbd5cSStefan Behrens 3261fd708b81SJosef Bacik if (btrfs_build_ref_tree(fs_info)) 3262fd708b81SJosef Bacik btrfs_err(fs_info, "couldn't build ref tree"); 3263fd708b81SJosef Bacik 326496da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 326596da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 32660b246afaSJeff Mahoney !btrfs_test_opt(fs_info, NOLOGREPLAY)) { 3267e8294f2fSDavid Sterba btrfs_info(fs_info, "start tree-log replay"); 326863443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 326979787eaaSJeff Mahoney if (ret) { 327063443bf5SEric Sandeen err = ret; 327128c16cbbSWang Shilong goto fail_qgroup; 3272e556ce2cSYan Zheng } 3273e02119d5SChris Mason } 32741a40e23bSZheng Yan 32756bccf3abSJeff Mahoney ret = btrfs_find_orphan_roots(fs_info); 327679787eaaSJeff Mahoney if (ret) 327728c16cbbSWang Shilong goto fail_qgroup; 327876dda93cSYan, Zheng 3279bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3280d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 328144c44af2SIlya Dryomov if (ret) 328228c16cbbSWang Shilong goto fail_qgroup; 328390c711abSZygo Blaxell 328490c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 32855d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 328690c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3287d7ce5843SMiao Xie if (ret < 0) { 328805135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 328905135f59SDavid Sterba ret); 3290d7ce5843SMiao Xie err = -EINVAL; 3291bcef60f2SArne Jansen goto fail_qgroup; 3292d7ce5843SMiao Xie } 32937c2ca468SChris Mason } 32941a40e23bSZheng Yan 329556e9357aSDavid Sterba fs_info->fs_root = btrfs_get_fs_root(fs_info, BTRFS_FS_TREE_OBJECTID, true); 32963140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 32973140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3298f50f4353SLiu Bo btrfs_warn(fs_info, "failed to read fs tree: %d", err); 3299315bf8efSJosef Bacik fs_info->fs_root = NULL; 3300bcef60f2SArne Jansen goto fail_qgroup; 33013140c9a3SDan Carpenter } 3302c289811cSChris Mason 3303bc98a42cSDavid Howells if (sb_rdonly(sb)) 33042b6ba629SIlya Dryomov return 0; 33052b6ba629SIlya Dryomov 3306f8d468a1SOmar Sandoval if (btrfs_test_opt(fs_info, CLEAR_CACHE) && 3307f8d468a1SOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 33086675df31SOmar Sandoval clear_free_space_tree = 1; 33096675df31SOmar Sandoval } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && 33106675df31SOmar Sandoval !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) { 33116675df31SOmar Sandoval btrfs_warn(fs_info, "free space tree is invalid"); 33126675df31SOmar Sandoval clear_free_space_tree = 1; 33136675df31SOmar Sandoval } 33146675df31SOmar Sandoval 33156675df31SOmar Sandoval if (clear_free_space_tree) { 3316f8d468a1SOmar Sandoval btrfs_info(fs_info, "clearing free space tree"); 3317f8d468a1SOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 3318f8d468a1SOmar Sandoval if (ret) { 3319f8d468a1SOmar Sandoval btrfs_warn(fs_info, 3320f8d468a1SOmar Sandoval "failed to clear free space tree: %d", ret); 33216bccf3abSJeff Mahoney close_ctree(fs_info); 3322f8d468a1SOmar Sandoval return ret; 3323f8d468a1SOmar Sandoval } 3324f8d468a1SOmar Sandoval } 3325f8d468a1SOmar Sandoval 33260b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) && 3327511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 332805135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3329511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3330511711afSChris Mason if (ret) { 333105135f59SDavid Sterba btrfs_warn(fs_info, 333205135f59SDavid Sterba "failed to create free space tree: %d", ret); 33336bccf3abSJeff Mahoney close_ctree(fs_info); 3334511711afSChris Mason return ret; 3335511711afSChris Mason } 3336511711afSChris Mason } 3337511711afSChris Mason 3338e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 33392b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 33402b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 33412b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 33426bccf3abSJeff Mahoney close_ctree(fs_info); 33432b6ba629SIlya Dryomov return ret; 33442b6ba629SIlya Dryomov } 3345e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 334659641015SIlya Dryomov 33472b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 33482b6ba629SIlya Dryomov if (ret) { 334905135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 33506bccf3abSJeff Mahoney close_ctree(fs_info); 33512b6ba629SIlya Dryomov return ret; 3352e3acc2a6SJosef Bacik } 3353e3acc2a6SJosef Bacik 33548dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 33558dabb742SStefan Behrens if (ret) { 335605135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 33576bccf3abSJeff Mahoney close_ctree(fs_info); 33588dabb742SStefan Behrens return ret; 33598dabb742SStefan Behrens } 33608dabb742SStefan Behrens 3361b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3362b0643e59SDennis Zhou btrfs_discard_resume(fs_info); 3363b382a324SJan Schmidt 33644bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 336505135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3366f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3367f7a81ea4SStefan Behrens if (ret) { 336805135f59SDavid Sterba btrfs_warn(fs_info, 336905135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 33706bccf3abSJeff Mahoney close_ctree(fs_info); 3371f7a81ea4SStefan Behrens return ret; 3372f7a81ea4SStefan Behrens } 33730b246afaSJeff Mahoney } else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || 33744bbcaa64SEric Sandeen fs_info->generation != 33754bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 337605135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 337770f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 337870f80175SStefan Behrens if (ret) { 337905135f59SDavid Sterba btrfs_warn(fs_info, 338005135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 33816bccf3abSJeff Mahoney close_ctree(fs_info); 338270f80175SStefan Behrens return ret; 338370f80175SStefan Behrens } 3384f7a81ea4SStefan Behrens } 3385afcdd129SJosef Bacik set_bit(BTRFS_FS_OPEN, &fs_info->flags); 338647ab2a6cSJosef Bacik 33878dcddfa0SQu Wenruo /* 33888dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 33898dcddfa0SQu Wenruo * no need to keep the flag 33908dcddfa0SQu Wenruo */ 33918dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 33928dcddfa0SQu Wenruo 3393ad2b2c80SAl Viro return 0; 339439279cc3SChris Mason 3395bcef60f2SArne Jansen fail_qgroup: 3396bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 33977c2ca468SChris Mason fail_trans_kthread: 33987c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 33992ff7e61eSJeff Mahoney btrfs_cleanup_transaction(fs_info); 3400faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 34013f157a2fSChris Mason fail_cleaner: 3402a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 34037c2ca468SChris Mason 34047c2ca468SChris Mason /* 34057c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 34067c2ca468SChris Mason * kthreads 34077c2ca468SChris Mason */ 34087c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 34097c2ca468SChris Mason 34102365dd3cSAnand Jain fail_sysfs: 34116618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 34122365dd3cSAnand Jain 3413b7c35e81SAnand Jain fail_fsdev_sysfs: 3414b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3415b7c35e81SAnand Jain 34161b1d1f66SJosef Bacik fail_block_groups: 341754067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 3418af31f5e5SChris Mason 3419af31f5e5SChris Mason fail_tree_roots: 34209e3aa805SJosef Bacik if (fs_info->data_reloc_root) 34219e3aa805SJosef Bacik btrfs_drop_and_free_fs_root(fs_info, fs_info->data_reloc_root); 34224273eaffSAnand Jain free_root_pointers(fs_info, true); 34232b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3424af31f5e5SChris Mason 342539279cc3SChris Mason fail_sb_buffer: 34267abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 34275cdd7db6SFilipe Manana btrfs_free_block_groups(fs_info); 342816cdcec7SMiao Xie fail_alloc: 3429586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3430586e46e2SIlya Dryomov 34314543df7eSChris Mason iput(fs_info->btree_inode); 34327e662854SQinghuang Feng fail: 3433586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3434ad2b2c80SAl Viro return err; 3435eb60ceacSChris Mason } 3436663faf9fSMasami Hiramatsu ALLOW_ERROR_INJECTION(open_ctree, ERRNO); 3437eb60ceacSChris Mason 3438314b6dd0SJohannes Thumshirn static void btrfs_end_super_write(struct bio *bio) 3439f2984462SChris Mason { 3440314b6dd0SJohannes Thumshirn struct btrfs_device *device = bio->bi_private; 3441314b6dd0SJohannes Thumshirn struct bio_vec *bvec; 3442314b6dd0SJohannes Thumshirn struct bvec_iter_all iter_all; 3443314b6dd0SJohannes Thumshirn struct page *page; 3444442a4f63SStefan Behrens 3445314b6dd0SJohannes Thumshirn bio_for_each_segment_all(bvec, bio, iter_all) { 3446314b6dd0SJohannes Thumshirn page = bvec->bv_page; 3447314b6dd0SJohannes Thumshirn 3448314b6dd0SJohannes Thumshirn if (bio->bi_status) { 3449fb456252SJeff Mahoney btrfs_warn_rl_in_rcu(device->fs_info, 3450314b6dd0SJohannes Thumshirn "lost page write due to IO error on %s (%d)", 3451314b6dd0SJohannes Thumshirn rcu_str_deref(device->name), 3452314b6dd0SJohannes Thumshirn blk_status_to_errno(bio->bi_status)); 3453314b6dd0SJohannes Thumshirn ClearPageUptodate(page); 3454314b6dd0SJohannes Thumshirn SetPageError(page); 3455314b6dd0SJohannes Thumshirn btrfs_dev_stat_inc_and_print(device, 3456314b6dd0SJohannes Thumshirn BTRFS_DEV_STAT_WRITE_ERRS); 3457314b6dd0SJohannes Thumshirn } else { 3458314b6dd0SJohannes Thumshirn SetPageUptodate(page); 3459f2984462SChris Mason } 3460314b6dd0SJohannes Thumshirn 3461314b6dd0SJohannes Thumshirn put_page(page); 3462314b6dd0SJohannes Thumshirn unlock_page(page); 3463314b6dd0SJohannes Thumshirn } 3464314b6dd0SJohannes Thumshirn 3465314b6dd0SJohannes Thumshirn bio_put(bio); 3466f2984462SChris Mason } 3467f2984462SChris Mason 34688f32380dSJohannes Thumshirn struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, 34698f32380dSJohannes Thumshirn int copy_num) 347029c36d72SAnand Jain { 347129c36d72SAnand Jain struct btrfs_super_block *super; 34728f32380dSJohannes Thumshirn struct page *page; 347329c36d72SAnand Jain u64 bytenr; 34748f32380dSJohannes Thumshirn struct address_space *mapping = bdev->bd_inode->i_mapping; 347529c36d72SAnand Jain 347629c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 347729c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 34788f32380dSJohannes Thumshirn return ERR_PTR(-EINVAL); 347929c36d72SAnand Jain 34808f32380dSJohannes Thumshirn page = read_cache_page_gfp(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS); 34818f32380dSJohannes Thumshirn if (IS_ERR(page)) 34828f32380dSJohannes Thumshirn return ERR_CAST(page); 348329c36d72SAnand Jain 34848f32380dSJohannes Thumshirn super = page_address(page); 348529c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 348629c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 34878f32380dSJohannes Thumshirn btrfs_release_disk_super(super); 34888f32380dSJohannes Thumshirn return ERR_PTR(-EINVAL); 348929c36d72SAnand Jain } 349029c36d72SAnand Jain 34918f32380dSJohannes Thumshirn return super; 349229c36d72SAnand Jain } 349329c36d72SAnand Jain 349429c36d72SAnand Jain 34958f32380dSJohannes Thumshirn struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev) 3496a512bbf8SYan Zheng { 34978f32380dSJohannes Thumshirn struct btrfs_super_block *super, *latest = NULL; 3498a512bbf8SYan Zheng int i; 3499a512bbf8SYan Zheng u64 transid = 0; 3500a512bbf8SYan Zheng 3501a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3502a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3503a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3504a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3505a512bbf8SYan Zheng */ 3506a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 35078f32380dSJohannes Thumshirn super = btrfs_read_dev_one_super(bdev, i); 35088f32380dSJohannes Thumshirn if (IS_ERR(super)) 3509a512bbf8SYan Zheng continue; 3510a512bbf8SYan Zheng 3511a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 35128f32380dSJohannes Thumshirn if (latest) 35138f32380dSJohannes Thumshirn btrfs_release_disk_super(super); 35148f32380dSJohannes Thumshirn 35158f32380dSJohannes Thumshirn latest = super; 3516a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3517a512bbf8SYan Zheng } 3518a512bbf8SYan Zheng } 351992fc03fbSAnand Jain 35208f32380dSJohannes Thumshirn return super; 3521a512bbf8SYan Zheng } 3522a512bbf8SYan Zheng 35234eedeb75SHisashi Hifumi /* 3524abbb3b8eSDavid Sterba * Write superblock @sb to the @device. Do not wait for completion, all the 3525314b6dd0SJohannes Thumshirn * pages we use for writing are locked. 35264eedeb75SHisashi Hifumi * 3527abbb3b8eSDavid Sterba * Write @max_mirrors copies of the superblock, where 0 means default that fit 3528abbb3b8eSDavid Sterba * the expected device size at commit time. Note that max_mirrors must be 3529abbb3b8eSDavid Sterba * same for write and wait phases. 35304eedeb75SHisashi Hifumi * 3531314b6dd0SJohannes Thumshirn * Return number of errors when page is not found or submission fails. 35324eedeb75SHisashi Hifumi */ 3533a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3534abbb3b8eSDavid Sterba struct btrfs_super_block *sb, int max_mirrors) 3535a512bbf8SYan Zheng { 3536d5178578SJohannes Thumshirn struct btrfs_fs_info *fs_info = device->fs_info; 3537314b6dd0SJohannes Thumshirn struct address_space *mapping = device->bdev->bd_inode->i_mapping; 3538d5178578SJohannes Thumshirn SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); 3539a512bbf8SYan Zheng int i; 3540a512bbf8SYan Zheng int errors = 0; 3541a512bbf8SYan Zheng u64 bytenr; 3542a512bbf8SYan Zheng 3543a512bbf8SYan Zheng if (max_mirrors == 0) 3544a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3545a512bbf8SYan Zheng 3546d5178578SJohannes Thumshirn shash->tfm = fs_info->csum_shash; 3547d5178578SJohannes Thumshirn 3548a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3549314b6dd0SJohannes Thumshirn struct page *page; 3550314b6dd0SJohannes Thumshirn struct bio *bio; 3551314b6dd0SJohannes Thumshirn struct btrfs_super_block *disk_super; 3552314b6dd0SJohannes Thumshirn 3553a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3554935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3555935e5cc9SMiao Xie device->commit_total_bytes) 3556a512bbf8SYan Zheng break; 3557a512bbf8SYan Zheng 3558a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3559a512bbf8SYan Zheng 3560fd08001fSEric Biggers crypto_shash_digest(shash, (const char *)sb + BTRFS_CSUM_SIZE, 3561fd08001fSEric Biggers BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, 3562fd08001fSEric Biggers sb->csum); 3563a512bbf8SYan Zheng 3564314b6dd0SJohannes Thumshirn page = find_or_create_page(mapping, bytenr >> PAGE_SHIFT, 3565314b6dd0SJohannes Thumshirn GFP_NOFS); 3566314b6dd0SJohannes Thumshirn if (!page) { 3567fb456252SJeff Mahoney btrfs_err(device->fs_info, 3568314b6dd0SJohannes Thumshirn "couldn't get super block page for bytenr %llu", 3569f14d104dSDavid Sterba bytenr); 3570634554dcSJosef Bacik errors++; 3571634554dcSJosef Bacik continue; 3572634554dcSJosef Bacik } 3573634554dcSJosef Bacik 3574314b6dd0SJohannes Thumshirn /* Bump the refcount for wait_dev_supers() */ 3575314b6dd0SJohannes Thumshirn get_page(page); 3576a512bbf8SYan Zheng 3577314b6dd0SJohannes Thumshirn disk_super = page_address(page); 3578314b6dd0SJohannes Thumshirn memcpy(disk_super, sb, BTRFS_SUPER_INFO_SIZE); 3579a512bbf8SYan Zheng 3580387125fcSChris Mason /* 3581314b6dd0SJohannes Thumshirn * Directly use bios here instead of relying on the page cache 3582314b6dd0SJohannes Thumshirn * to do I/O, so we don't lose the ability to do integrity 3583314b6dd0SJohannes Thumshirn * checking. 3584387125fcSChris Mason */ 3585314b6dd0SJohannes Thumshirn bio = bio_alloc(GFP_NOFS, 1); 3586314b6dd0SJohannes Thumshirn bio_set_dev(bio, device->bdev); 3587314b6dd0SJohannes Thumshirn bio->bi_iter.bi_sector = bytenr >> SECTOR_SHIFT; 3588314b6dd0SJohannes Thumshirn bio->bi_private = device; 3589314b6dd0SJohannes Thumshirn bio->bi_end_io = btrfs_end_super_write; 3590314b6dd0SJohannes Thumshirn __bio_add_page(bio, page, BTRFS_SUPER_INFO_SIZE, 3591314b6dd0SJohannes Thumshirn offset_in_page(bytenr)); 3592314b6dd0SJohannes Thumshirn 3593314b6dd0SJohannes Thumshirn /* 3594314b6dd0SJohannes Thumshirn * We FUA only the first super block. The others we allow to 3595314b6dd0SJohannes Thumshirn * go down lazy and there's a short window where the on-disk 3596314b6dd0SJohannes Thumshirn * copies might still contain the older version. 3597314b6dd0SJohannes Thumshirn */ 3598314b6dd0SJohannes Thumshirn bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_META | REQ_PRIO; 35991b9e619cSOmar Sandoval if (i == 0 && !btrfs_test_opt(device->fs_info, NOBARRIER)) 3600314b6dd0SJohannes Thumshirn bio->bi_opf |= REQ_FUA; 3601314b6dd0SJohannes Thumshirn 3602314b6dd0SJohannes Thumshirn btrfsic_submit_bio(bio); 3603a512bbf8SYan Zheng } 3604a512bbf8SYan Zheng return errors < i ? 0 : -1; 3605a512bbf8SYan Zheng } 3606a512bbf8SYan Zheng 3607387125fcSChris Mason /* 3608abbb3b8eSDavid Sterba * Wait for write completion of superblocks done by write_dev_supers, 3609abbb3b8eSDavid Sterba * @max_mirrors same for write and wait phases. 3610abbb3b8eSDavid Sterba * 3611314b6dd0SJohannes Thumshirn * Return number of errors when page is not found or not marked up to 3612abbb3b8eSDavid Sterba * date. 3613abbb3b8eSDavid Sterba */ 3614abbb3b8eSDavid Sterba static int wait_dev_supers(struct btrfs_device *device, int max_mirrors) 3615abbb3b8eSDavid Sterba { 3616abbb3b8eSDavid Sterba int i; 3617abbb3b8eSDavid Sterba int errors = 0; 3618b6a535faSHoward McLauchlan bool primary_failed = false; 3619abbb3b8eSDavid Sterba u64 bytenr; 3620abbb3b8eSDavid Sterba 3621abbb3b8eSDavid Sterba if (max_mirrors == 0) 3622abbb3b8eSDavid Sterba max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3623abbb3b8eSDavid Sterba 3624abbb3b8eSDavid Sterba for (i = 0; i < max_mirrors; i++) { 3625314b6dd0SJohannes Thumshirn struct page *page; 3626314b6dd0SJohannes Thumshirn 3627abbb3b8eSDavid Sterba bytenr = btrfs_sb_offset(i); 3628abbb3b8eSDavid Sterba if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3629abbb3b8eSDavid Sterba device->commit_total_bytes) 3630abbb3b8eSDavid Sterba break; 3631abbb3b8eSDavid Sterba 3632314b6dd0SJohannes Thumshirn page = find_get_page(device->bdev->bd_inode->i_mapping, 3633314b6dd0SJohannes Thumshirn bytenr >> PAGE_SHIFT); 3634314b6dd0SJohannes Thumshirn if (!page) { 3635abbb3b8eSDavid Sterba errors++; 3636b6a535faSHoward McLauchlan if (i == 0) 3637b6a535faSHoward McLauchlan primary_failed = true; 3638abbb3b8eSDavid Sterba continue; 3639abbb3b8eSDavid Sterba } 3640314b6dd0SJohannes Thumshirn /* Page is submitted locked and unlocked once the IO completes */ 3641314b6dd0SJohannes Thumshirn wait_on_page_locked(page); 3642314b6dd0SJohannes Thumshirn if (PageError(page)) { 3643abbb3b8eSDavid Sterba errors++; 3644b6a535faSHoward McLauchlan if (i == 0) 3645b6a535faSHoward McLauchlan primary_failed = true; 3646b6a535faSHoward McLauchlan } 3647abbb3b8eSDavid Sterba 3648314b6dd0SJohannes Thumshirn /* Drop our reference */ 3649314b6dd0SJohannes Thumshirn put_page(page); 3650abbb3b8eSDavid Sterba 3651314b6dd0SJohannes Thumshirn /* Drop the reference from the writing run */ 3652314b6dd0SJohannes Thumshirn put_page(page); 3653abbb3b8eSDavid Sterba } 3654abbb3b8eSDavid Sterba 3655b6a535faSHoward McLauchlan /* log error, force error return */ 3656b6a535faSHoward McLauchlan if (primary_failed) { 3657b6a535faSHoward McLauchlan btrfs_err(device->fs_info, "error writing primary super block to device %llu", 3658b6a535faSHoward McLauchlan device->devid); 3659b6a535faSHoward McLauchlan return -1; 3660b6a535faSHoward McLauchlan } 3661b6a535faSHoward McLauchlan 3662abbb3b8eSDavid Sterba return errors < i ? 0 : -1; 3663abbb3b8eSDavid Sterba } 3664abbb3b8eSDavid Sterba 3665abbb3b8eSDavid Sterba /* 3666387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3667387125fcSChris Mason * for the barrier when it is done 3668387125fcSChris Mason */ 36694246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3670387125fcSChris Mason { 3671387125fcSChris Mason complete(bio->bi_private); 3672387125fcSChris Mason } 3673387125fcSChris Mason 3674387125fcSChris Mason /* 36754fc6441aSAnand Jain * Submit a flush request to the device if it supports it. Error handling is 36764fc6441aSAnand Jain * done in the waiting counterpart. 3677387125fcSChris Mason */ 36784fc6441aSAnand Jain static void write_dev_flush(struct btrfs_device *device) 3679387125fcSChris Mason { 3680c2a9c7abSAnand Jain struct request_queue *q = bdev_get_queue(device->bdev); 3681e0ae9994SDavid Sterba struct bio *bio = device->flush_bio; 3682387125fcSChris Mason 3683c2a9c7abSAnand Jain if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) 36844fc6441aSAnand Jain return; 3685387125fcSChris Mason 3686e0ae9994SDavid Sterba bio_reset(bio); 3687387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 368874d46992SChristoph Hellwig bio_set_dev(bio, device->bdev); 36898d910125SJan Kara bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH; 3690387125fcSChris Mason init_completion(&device->flush_wait); 3691387125fcSChris Mason bio->bi_private = &device->flush_wait; 3692387125fcSChris Mason 369343a01111SLu Fengqi btrfsic_submit_bio(bio); 36941c3063b6SAnand Jain set_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 36954fc6441aSAnand Jain } 3696387125fcSChris Mason 36974fc6441aSAnand Jain /* 36984fc6441aSAnand Jain * If the flush bio has been submitted by write_dev_flush, wait for it. 36994fc6441aSAnand Jain */ 37008c27cb35SLinus Torvalds static blk_status_t wait_dev_flush(struct btrfs_device *device) 37014fc6441aSAnand Jain { 37024fc6441aSAnand Jain struct bio *bio = device->flush_bio; 37034fc6441aSAnand Jain 37041c3063b6SAnand Jain if (!test_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state)) 370558efbc9fSOmar Sandoval return BLK_STS_OK; 37064fc6441aSAnand Jain 37071c3063b6SAnand Jain clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); 37082980d574SDavid Sterba wait_for_completion_io(&device->flush_wait); 37094fc6441aSAnand Jain 37108c27cb35SLinus Torvalds return bio->bi_status; 3711387125fcSChris Mason } 3712387125fcSChris Mason 3713d10b82feSQu Wenruo static int check_barrier_error(struct btrfs_fs_info *fs_info) 3714401b41e5SAnand Jain { 37156528b99dSAnand Jain if (!btrfs_check_rw_degradable(fs_info, NULL)) 3716401b41e5SAnand Jain return -EIO; 3717387125fcSChris Mason return 0; 3718387125fcSChris Mason } 3719387125fcSChris Mason 3720387125fcSChris Mason /* 3721387125fcSChris Mason * send an empty flush down to each device in parallel, 3722387125fcSChris Mason * then wait for them 3723387125fcSChris Mason */ 3724387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3725387125fcSChris Mason { 3726387125fcSChris Mason struct list_head *head; 3727387125fcSChris Mason struct btrfs_device *dev; 37285af3e8ccSStefan Behrens int errors_wait = 0; 37294e4cbee9SChristoph Hellwig blk_status_t ret; 3730387125fcSChris Mason 37311538e6c5SDavid Sterba lockdep_assert_held(&info->fs_devices->device_list_mutex); 3732387125fcSChris Mason /* send down all the barriers */ 3733387125fcSChris Mason head = &info->fs_devices->devices; 37341538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3735e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3736f88ba6a2SHidetoshi Seto continue; 3737cea7c8bfSAnand Jain if (!dev->bdev) 3738387125fcSChris Mason continue; 3739e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3740ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3741387125fcSChris Mason continue; 3742387125fcSChris Mason 37434fc6441aSAnand Jain write_dev_flush(dev); 374458efbc9fSOmar Sandoval dev->last_flush_error = BLK_STS_OK; 3745387125fcSChris Mason } 3746387125fcSChris Mason 3747387125fcSChris Mason /* wait for all the barriers */ 37481538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3749e6e674bdSAnand Jain if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) 3750f88ba6a2SHidetoshi Seto continue; 3751387125fcSChris Mason if (!dev->bdev) { 37525af3e8ccSStefan Behrens errors_wait++; 3753387125fcSChris Mason continue; 3754387125fcSChris Mason } 3755e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3756ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3757387125fcSChris Mason continue; 3758387125fcSChris Mason 37594fc6441aSAnand Jain ret = wait_dev_flush(dev); 3760401b41e5SAnand Jain if (ret) { 3761401b41e5SAnand Jain dev->last_flush_error = ret; 376266b4993eSDavid Sterba btrfs_dev_stat_inc_and_print(dev, 376366b4993eSDavid Sterba BTRFS_DEV_STAT_FLUSH_ERRS); 37645af3e8ccSStefan Behrens errors_wait++; 3765387125fcSChris Mason } 3766401b41e5SAnand Jain } 3767401b41e5SAnand Jain 3768cea7c8bfSAnand Jain if (errors_wait) { 3769401b41e5SAnand Jain /* 3770401b41e5SAnand Jain * At some point we need the status of all disks 3771401b41e5SAnand Jain * to arrive at the volume status. So error checking 3772401b41e5SAnand Jain * is being pushed to a separate loop. 3773401b41e5SAnand Jain */ 3774d10b82feSQu Wenruo return check_barrier_error(info); 3775401b41e5SAnand Jain } 3776387125fcSChris Mason return 0; 3777387125fcSChris Mason } 3778387125fcSChris Mason 3779943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3780943c6e99SZhao Lei { 37818789f4feSZhao Lei int raid_type; 37828789f4feSZhao Lei int min_tolerated = INT_MAX; 3783943c6e99SZhao Lei 37848789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 37858789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 37868c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 37878789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 37888789f4feSZhao Lei tolerated_failures); 3789943c6e99SZhao Lei 37908789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 37918789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 37928789f4feSZhao Lei continue; 379341a6e891SAnand Jain if (!(flags & btrfs_raid_array[raid_type].bg_flag)) 37948789f4feSZhao Lei continue; 37958c3e3582SDavid Sterba min_tolerated = min_t(int, min_tolerated, 37968789f4feSZhao Lei btrfs_raid_array[raid_type]. 37978789f4feSZhao Lei tolerated_failures); 37988789f4feSZhao Lei } 3799943c6e99SZhao Lei 38008789f4feSZhao Lei if (min_tolerated == INT_MAX) { 3801ab8d0fc4SJeff Mahoney pr_warn("BTRFS: unknown raid flag: %llu", flags); 38028789f4feSZhao Lei min_tolerated = 0; 38038789f4feSZhao Lei } 38048789f4feSZhao Lei 38058789f4feSZhao Lei return min_tolerated; 3806943c6e99SZhao Lei } 3807943c6e99SZhao Lei 3808eece6a9cSDavid Sterba int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) 3809f2984462SChris Mason { 3810e5e9a520SChris Mason struct list_head *head; 3811f2984462SChris Mason struct btrfs_device *dev; 3812a061fc8dSChris Mason struct btrfs_super_block *sb; 3813f2984462SChris Mason struct btrfs_dev_item *dev_item; 3814f2984462SChris Mason int ret; 3815f2984462SChris Mason int do_barriers; 3816a236aed1SChris Mason int max_errors; 3817a236aed1SChris Mason int total_errors = 0; 3818a061fc8dSChris Mason u64 flags; 3819f2984462SChris Mason 38200b246afaSJeff Mahoney do_barriers = !btrfs_test_opt(fs_info, NOBARRIER); 3821fed3b381SLiu Bo 3822fed3b381SLiu Bo /* 3823fed3b381SLiu Bo * max_mirrors == 0 indicates we're from commit_transaction, 3824fed3b381SLiu Bo * not from fsync where the tree roots in fs_info have not 3825fed3b381SLiu Bo * been consistent on disk. 3826fed3b381SLiu Bo */ 3827fed3b381SLiu Bo if (max_mirrors == 0) 38280b246afaSJeff Mahoney backup_super_roots(fs_info); 3829f2984462SChris Mason 38300b246afaSJeff Mahoney sb = fs_info->super_for_commit; 3831a061fc8dSChris Mason dev_item = &sb->dev_item; 3832e5e9a520SChris Mason 38330b246afaSJeff Mahoney mutex_lock(&fs_info->fs_devices->device_list_mutex); 38340b246afaSJeff Mahoney head = &fs_info->fs_devices->devices; 38350b246afaSJeff Mahoney max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1; 3836387125fcSChris Mason 38375af3e8ccSStefan Behrens if (do_barriers) { 38380b246afaSJeff Mahoney ret = barrier_all_devices(fs_info); 38395af3e8ccSStefan Behrens if (ret) { 38405af3e8ccSStefan Behrens mutex_unlock( 38410b246afaSJeff Mahoney &fs_info->fs_devices->device_list_mutex); 38420b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, ret, 38435af3e8ccSStefan Behrens "errors while submitting device barriers."); 38445af3e8ccSStefan Behrens return ret; 38455af3e8ccSStefan Behrens } 38465af3e8ccSStefan Behrens } 3847387125fcSChris Mason 38481538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3849dfe25020SChris Mason if (!dev->bdev) { 3850dfe25020SChris Mason total_errors++; 3851dfe25020SChris Mason continue; 3852dfe25020SChris Mason } 3853e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3854ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3855dfe25020SChris Mason continue; 3856dfe25020SChris Mason 38572b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3858a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3859a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 38607df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3861935e5cc9SMiao Xie dev->commit_total_bytes); 3862ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3863ce7213c7SMiao Xie dev->commit_bytes_used); 3864a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3865a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3866a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3867a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 38687239ff4bSNikolay Borisov memcpy(dev_item->fsid, dev->fs_devices->metadata_uuid, 38697239ff4bSNikolay Borisov BTRFS_FSID_SIZE); 3870a512bbf8SYan Zheng 3871a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3872a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3873f2984462SChris Mason 387475cb857dSQu Wenruo ret = btrfs_validate_write_super(fs_info, sb); 387575cb857dSQu Wenruo if (ret < 0) { 387675cb857dSQu Wenruo mutex_unlock(&fs_info->fs_devices->device_list_mutex); 387775cb857dSQu Wenruo btrfs_handle_fs_error(fs_info, -EUCLEAN, 387875cb857dSQu Wenruo "unexpected superblock corruption detected"); 387975cb857dSQu Wenruo return -EUCLEAN; 388075cb857dSQu Wenruo } 388175cb857dSQu Wenruo 3882abbb3b8eSDavid Sterba ret = write_dev_supers(dev, sb, max_mirrors); 3883a236aed1SChris Mason if (ret) 3884a236aed1SChris Mason total_errors++; 3885f2984462SChris Mason } 3886a236aed1SChris Mason if (total_errors > max_errors) { 38870b246afaSJeff Mahoney btrfs_err(fs_info, "%d errors while writing supers", 3888d397712bSChris Mason total_errors); 38890b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 389079787eaaSJeff Mahoney 38919d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 38920b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 38930b246afaSJeff Mahoney "%d errors while writing supers", 38940b246afaSJeff Mahoney total_errors); 38959d565ba4SStefan Behrens return -EIO; 3896a236aed1SChris Mason } 3897f2984462SChris Mason 3898a512bbf8SYan Zheng total_errors = 0; 38991538e6c5SDavid Sterba list_for_each_entry(dev, head, dev_list) { 3900dfe25020SChris Mason if (!dev->bdev) 3901dfe25020SChris Mason continue; 3902e12c9621SAnand Jain if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || 3903ebbede42SAnand Jain !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) 3904dfe25020SChris Mason continue; 3905dfe25020SChris Mason 3906abbb3b8eSDavid Sterba ret = wait_dev_supers(dev, max_mirrors); 3907a512bbf8SYan Zheng if (ret) 39081259ab75SChris Mason total_errors++; 3909f2984462SChris Mason } 39100b246afaSJeff Mahoney mutex_unlock(&fs_info->fs_devices->device_list_mutex); 3911a236aed1SChris Mason if (total_errors > max_errors) { 39120b246afaSJeff Mahoney btrfs_handle_fs_error(fs_info, -EIO, 39130b246afaSJeff Mahoney "%d errors while writing supers", 39140b246afaSJeff Mahoney total_errors); 391579787eaaSJeff Mahoney return -EIO; 3916a236aed1SChris Mason } 3917f2984462SChris Mason return 0; 3918f2984462SChris Mason } 3919f2984462SChris Mason 3920cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3921cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3922cb517eabSMiao Xie struct btrfs_root *root) 39232619ba1fSChris Mason { 39244785e24fSJosef Bacik bool drop_ref = false; 39254785e24fSJosef Bacik 39264df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 39272619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 39282619ba1fSChris Mason (unsigned long)root->root_key.objectid); 3929af01d2e5SJosef Bacik if (test_and_clear_bit(BTRFS_ROOT_IN_RADIX, &root->state)) 39304785e24fSJosef Bacik drop_ref = true; 39314df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 393276dda93cSYan, Zheng 39331c1ea4f7SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 3934ef67963dSJosef Bacik ASSERT(root->log_root == NULL); 39351c1ea4f7SLiu Bo if (root->reloc_root) { 393600246528SJosef Bacik btrfs_put_root(root->reloc_root); 39371c1ea4f7SLiu Bo root->reloc_root = NULL; 39381c1ea4f7SLiu Bo } 39391c1ea4f7SLiu Bo } 39403321719eSLiu Bo 3941faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3942581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3943faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3944581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 39450e996e7fSJosef Bacik if (root->ino_cache_inode) { 39460e996e7fSJosef Bacik iput(root->ino_cache_inode); 39470e996e7fSJosef Bacik root->ino_cache_inode = NULL; 39480e996e7fSJosef Bacik } 39494785e24fSJosef Bacik if (drop_ref) 395000246528SJosef Bacik btrfs_put_root(root); 39512619ba1fSChris Mason } 39522619ba1fSChris Mason 3953c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3954c146afadSYan Zheng { 3955c146afadSYan Zheng u64 root_objectid = 0; 3956c146afadSYan Zheng struct btrfs_root *gang[8]; 395765d33fd7SQu Wenruo int i = 0; 395865d33fd7SQu Wenruo int err = 0; 395965d33fd7SQu Wenruo unsigned int ret = 0; 3960c146afadSYan Zheng 3961c146afadSYan Zheng while (1) { 3962efc34534SJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 3963c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3964c146afadSYan Zheng (void **)gang, root_objectid, 3965c146afadSYan Zheng ARRAY_SIZE(gang)); 396665d33fd7SQu Wenruo if (!ret) { 3967efc34534SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 3968c146afadSYan Zheng break; 396965d33fd7SQu Wenruo } 39705d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 397166b4ffd1SJosef Bacik 397265d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 397365d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 397465d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 397565d33fd7SQu Wenruo gang[i] = NULL; 397665d33fd7SQu Wenruo continue; 397765d33fd7SQu Wenruo } 397865d33fd7SQu Wenruo /* grab all the search result for later use */ 397900246528SJosef Bacik gang[i] = btrfs_grab_root(gang[i]); 398065d33fd7SQu Wenruo } 3981efc34534SJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 398265d33fd7SQu Wenruo 398365d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 398465d33fd7SQu Wenruo if (!gang[i]) 398565d33fd7SQu Wenruo continue; 3986c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 398766b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 398866b4ffd1SJosef Bacik if (err) 398965d33fd7SQu Wenruo break; 399000246528SJosef Bacik btrfs_put_root(gang[i]); 3991c146afadSYan Zheng } 3992c146afadSYan Zheng root_objectid++; 3993c146afadSYan Zheng } 399465d33fd7SQu Wenruo 399565d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 399665d33fd7SQu Wenruo for (; i < ret; i++) { 399765d33fd7SQu Wenruo if (gang[i]) 399800246528SJosef Bacik btrfs_put_root(gang[i]); 399965d33fd7SQu Wenruo } 400065d33fd7SQu Wenruo return err; 4001c146afadSYan Zheng } 4002c146afadSYan Zheng 40036bccf3abSJeff Mahoney int btrfs_commit_super(struct btrfs_fs_info *fs_info) 4004c146afadSYan Zheng { 40056bccf3abSJeff Mahoney struct btrfs_root *root = fs_info->tree_root; 4006c146afadSYan Zheng struct btrfs_trans_handle *trans; 4007c146afadSYan Zheng 40080b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 40092ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 40100b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 40110b246afaSJeff Mahoney wake_up_process(fs_info->cleaner_kthread); 4012c71bf099SYan, Zheng 4013c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 40140b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 40150b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 4016c71bf099SYan, Zheng 40177a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 40183612b495STsutomu Itoh if (IS_ERR(trans)) 40193612b495STsutomu Itoh return PTR_ERR(trans); 40203a45bb20SJeff Mahoney return btrfs_commit_transaction(trans); 4021c146afadSYan Zheng } 4022c146afadSYan Zheng 4023b105e927SDavid Sterba void __cold close_ctree(struct btrfs_fs_info *fs_info) 4024eb60ceacSChris Mason { 4025c146afadSYan Zheng int ret; 4026e089f05cSChris Mason 4027afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); 4028d6fd0ae2SOmar Sandoval /* 4029d6fd0ae2SOmar Sandoval * We don't want the cleaner to start new transactions, add more delayed 4030d6fd0ae2SOmar Sandoval * iputs, etc. while we're closing. We can't use kthread_stop() yet 4031d6fd0ae2SOmar Sandoval * because that frees the task_struct, and the transaction kthread might 4032d6fd0ae2SOmar Sandoval * still try to wake up the cleaner. 4033d6fd0ae2SOmar Sandoval */ 4034d6fd0ae2SOmar Sandoval kthread_park(fs_info->cleaner_kthread); 4035a2135011SChris Mason 40367343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 4037d06f23d6SJeff Mahoney btrfs_qgroup_wait_for_completion(fs_info, false); 40387343dd61SJustin Maggard 4039803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 4040803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 4041803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 4042803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 4043803b2f54SStefan Behrens 4044837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 4045aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 4046837d5b6eSIlya Dryomov 40478dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 40488dabb742SStefan Behrens 4049aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 40504cb5300bSChris Mason 40514cb5300bSChris Mason /* wait for any defraggers to finish */ 40524cb5300bSChris Mason wait_event(fs_info->transaction_wait, 40534cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 40544cb5300bSChris Mason 40554cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 405626176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 40574cb5300bSChris Mason 405821c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 405957056740SJosef Bacik cancel_work_sync(&fs_info->async_data_reclaim_work); 406021c7e756SMiao Xie 4061b0643e59SDennis Zhou /* Cancel or finish ongoing discard work */ 4062b0643e59SDennis Zhou btrfs_discard_cleanup(fs_info); 4063b0643e59SDennis Zhou 4064bc98a42cSDavid Howells if (!sb_rdonly(fs_info->sb)) { 4065e44163e1SJeff Mahoney /* 4066d6fd0ae2SOmar Sandoval * The cleaner kthread is stopped, so do one final pass over 4067d6fd0ae2SOmar Sandoval * unused block groups. 4068e44163e1SJeff Mahoney */ 40690b246afaSJeff Mahoney btrfs_delete_unused_bgs(fs_info); 4070e44163e1SJeff Mahoney 4071f0cc2cd7SFilipe Manana /* 4072f0cc2cd7SFilipe Manana * There might be existing delayed inode workers still running 4073f0cc2cd7SFilipe Manana * and holding an empty delayed inode item. We must wait for 4074f0cc2cd7SFilipe Manana * them to complete first because they can create a transaction. 4075f0cc2cd7SFilipe Manana * This happens when someone calls btrfs_balance_delayed_items() 4076f0cc2cd7SFilipe Manana * and then a transaction commit runs the same delayed nodes 4077f0cc2cd7SFilipe Manana * before any delayed worker has done something with the nodes. 4078f0cc2cd7SFilipe Manana * We must wait for any worker here and not at transaction 4079f0cc2cd7SFilipe Manana * commit time since that could cause a deadlock. 4080f0cc2cd7SFilipe Manana * This is a very rare case. 4081f0cc2cd7SFilipe Manana */ 4082f0cc2cd7SFilipe Manana btrfs_flush_workqueue(fs_info->delayed_workers); 4083f0cc2cd7SFilipe Manana 40846bccf3abSJeff Mahoney ret = btrfs_commit_super(fs_info); 4085d397712bSChris Mason if (ret) 408604892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 4087c146afadSYan Zheng } 4088ed2ff2cbSChris Mason 4089af722733SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state) || 4090af722733SLiu Bo test_bit(BTRFS_FS_STATE_TRANS_ABORTED, &fs_info->fs_state)) 40912ff7e61eSJeff Mahoney btrfs_error_commit_super(fs_info); 4092acce952bSliubo 4093e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 4094e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 40958929ecfaSYan, Zheng 4096e187831eSJosef Bacik ASSERT(list_empty(&fs_info->delayed_iputs)); 4097afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); 4098f25784b3SYan Zheng 40995958253cSQu Wenruo if (btrfs_check_quota_leak(fs_info)) { 41005958253cSQu Wenruo WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); 41015958253cSQu Wenruo btrfs_err(fs_info, "qgroup reserved space leaked"); 41025958253cSQu Wenruo } 41035958253cSQu Wenruo 410404892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 4105fe816d0fSNikolay Borisov ASSERT(list_empty(&fs_info->delalloc_roots)); 4106bcef60f2SArne Jansen 4107963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 410804892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 4109963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 4110b0c68f8bSChris Mason } 411131153d81SYan Zheng 41124297ff84SJosef Bacik if (percpu_counter_sum(&fs_info->dio_bytes)) 41134297ff84SJosef Bacik btrfs_info(fs_info, "at unmount dio bytes count %lld", 41144297ff84SJosef Bacik percpu_counter_sum(&fs_info->dio_bytes)); 41154297ff84SJosef Bacik 41166618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 4117b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 41185ac1d209SJeff Mahoney 41191a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 41201a4319ccSLiu Bo 4121de348ee0SWang Shilong /* 4122de348ee0SWang Shilong * we must make sure there is not any read request to 4123de348ee0SWang Shilong * submit after we stopping all workers. 4124de348ee0SWang Shilong */ 4125de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 412696192499SJosef Bacik btrfs_stop_all_workers(fs_info); 412796192499SJosef Bacik 4128afcdd129SJosef Bacik clear_bit(BTRFS_FS_OPEN, &fs_info->flags); 41294273eaffSAnand Jain free_root_pointers(fs_info, true); 41308c38938cSJosef Bacik btrfs_free_fs_roots(fs_info); 41319ad6b7bcSChris Mason 41324e19443dSJosef Bacik /* 41334e19443dSJosef Bacik * We must free the block groups after dropping the fs_roots as we could 41344e19443dSJosef Bacik * have had an IO error and have left over tree log blocks that aren't 41354e19443dSJosef Bacik * cleaned up until the fs roots are freed. This makes the block group 41364e19443dSJosef Bacik * accounting appear to be wrong because there's pending reserved bytes, 41374e19443dSJosef Bacik * so make sure we do the block group cleanup afterwards. 41384e19443dSJosef Bacik */ 41394e19443dSJosef Bacik btrfs_free_block_groups(fs_info); 41404e19443dSJosef Bacik 414113e6c37bSJosef Bacik iput(fs_info->btree_inode); 4142d6bfde87SChris Mason 414321adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 41440b246afaSJeff Mahoney if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) 41452ff7e61eSJeff Mahoney btrfsic_unmount(fs_info->fs_devices); 414621adbd5cSStefan Behrens #endif 414721adbd5cSStefan Behrens 41480b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 414968c94e55SNikolay Borisov btrfs_close_devices(fs_info->fs_devices); 4150eb60ceacSChris Mason } 4151eb60ceacSChris Mason 4152b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 4153b9fab919SChris Mason int atomic) 4154ccd467d6SChris Mason { 41551259ab75SChris Mason int ret; 4156727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 41571259ab75SChris Mason 41580b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 41591259ab75SChris Mason if (!ret) 41601259ab75SChris Mason return ret; 41611259ab75SChris Mason 41621259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 4163b9fab919SChris Mason parent_transid, atomic); 4164b9fab919SChris Mason if (ret == -EAGAIN) 4165b9fab919SChris Mason return ret; 41661259ab75SChris Mason return !ret; 41675f39d397SChris Mason } 41686702ed49SChris Mason 41695f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 41705f39d397SChris Mason { 41710b246afaSJeff Mahoney struct btrfs_fs_info *fs_info; 417206ea65a3SJosef Bacik struct btrfs_root *root; 41735f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 4174b9473439SChris Mason int was_dirty; 4175b4ce94deSChris Mason 417606ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 417706ea65a3SJosef Bacik /* 417806ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 417952042d8eSAndrea Gelmini * enabled. Normal people shouldn't be using unmapped buffers as dirty 418006ea65a3SJosef Bacik * outside of the sanity tests. 418106ea65a3SJosef Bacik */ 4182b0132a3bSNikolay Borisov if (unlikely(test_bit(EXTENT_BUFFER_UNMAPPED, &buf->bflags))) 418306ea65a3SJosef Bacik return; 418406ea65a3SJosef Bacik #endif 418506ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 41860b246afaSJeff Mahoney fs_info = root->fs_info; 4187b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 41880b246afaSJeff Mahoney if (transid != fs_info->generation) 41895d163e0eSJeff Mahoney WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", 41900b246afaSJeff Mahoney buf->start, transid, fs_info->generation); 41910b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 4192e2d84521SMiao Xie if (!was_dirty) 4193104b4e51SNikolay Borisov percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, 4194e2d84521SMiao Xie buf->len, 41950b246afaSJeff Mahoney fs_info->dirty_metadata_batch); 41961f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 419769fc6cbbSQu Wenruo /* 419869fc6cbbSQu Wenruo * Since btrfs_mark_buffer_dirty() can be called with item pointer set 419969fc6cbbSQu Wenruo * but item data not updated. 420069fc6cbbSQu Wenruo * So here we should only check item pointers, not item data. 420169fc6cbbSQu Wenruo */ 420269fc6cbbSQu Wenruo if (btrfs_header_level(buf) == 0 && 4203cfdaad5eSDavid Sterba btrfs_check_leaf_relaxed(buf)) { 4204a4f78750SDavid Sterba btrfs_print_leaf(buf); 42051f21ef0aSFilipe Manana ASSERT(0); 42061f21ef0aSFilipe Manana } 42071f21ef0aSFilipe Manana #endif 4208eb60ceacSChris Mason } 4209eb60ceacSChris Mason 42102ff7e61eSJeff Mahoney static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info, 4211b53d3f5dSLiu Bo int flush_delayed) 421235b7e476SChris Mason { 4213188de649SChris Mason /* 4214188de649SChris Mason * looks as though older kernels can get into trouble with 4215188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4216188de649SChris Mason */ 4217e2d84521SMiao Xie int ret; 4218d6bfde87SChris Mason 42196933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4220d6bfde87SChris Mason return; 4221d6bfde87SChris Mason 4222b53d3f5dSLiu Bo if (flush_delayed) 42232ff7e61eSJeff Mahoney btrfs_balance_delayed_items(fs_info); 422416cdcec7SMiao Xie 4225d814a491SEthan Lien ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes, 4226d814a491SEthan Lien BTRFS_DIRTY_METADATA_THRESH, 4227d814a491SEthan Lien fs_info->dirty_metadata_batch); 4228e2d84521SMiao Xie if (ret > 0) { 42290b246afaSJeff Mahoney balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping); 423016cdcec7SMiao Xie } 423116cdcec7SMiao Xie } 423216cdcec7SMiao Xie 42332ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info) 423416cdcec7SMiao Xie { 42352ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 1); 423635b7e476SChris Mason } 4237b53d3f5dSLiu Bo 42382ff7e61eSJeff Mahoney void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info) 4239b53d3f5dSLiu Bo { 42402ff7e61eSJeff Mahoney __btrfs_btree_balance_dirty(fs_info, 0); 4241d6bfde87SChris Mason } 42426b80053dSChris Mason 4243581c1760SQu Wenruo int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, 4244581c1760SQu Wenruo struct btrfs_key *first_key) 42456b80053dSChris Mason { 42465ab12d1fSDavid Sterba return btree_read_extent_buffer_pages(buf, parent_transid, 4247581c1760SQu Wenruo level, first_key); 42486b80053dSChris Mason } 42490da5468fSChris Mason 42502ff7e61eSJeff Mahoney static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info) 4251acce952bSliubo { 4252fe816d0fSNikolay Borisov /* cleanup FS via transaction */ 4253fe816d0fSNikolay Borisov btrfs_cleanup_transaction(fs_info); 4254fe816d0fSNikolay Borisov 42550b246afaSJeff Mahoney mutex_lock(&fs_info->cleaner_mutex); 42562ff7e61eSJeff Mahoney btrfs_run_delayed_iputs(fs_info); 42570b246afaSJeff Mahoney mutex_unlock(&fs_info->cleaner_mutex); 4258acce952bSliubo 42590b246afaSJeff Mahoney down_write(&fs_info->cleanup_work_sem); 42600b246afaSJeff Mahoney up_write(&fs_info->cleanup_work_sem); 4261acce952bSliubo } 4262acce952bSliubo 4263ef67963dSJosef Bacik static void btrfs_drop_all_logs(struct btrfs_fs_info *fs_info) 4264ef67963dSJosef Bacik { 4265ef67963dSJosef Bacik struct btrfs_root *gang[8]; 4266ef67963dSJosef Bacik u64 root_objectid = 0; 4267ef67963dSJosef Bacik int ret; 4268ef67963dSJosef Bacik 4269ef67963dSJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 4270ef67963dSJosef Bacik while ((ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 4271ef67963dSJosef Bacik (void **)gang, root_objectid, 4272ef67963dSJosef Bacik ARRAY_SIZE(gang))) != 0) { 4273ef67963dSJosef Bacik int i; 4274ef67963dSJosef Bacik 4275ef67963dSJosef Bacik for (i = 0; i < ret; i++) 4276ef67963dSJosef Bacik gang[i] = btrfs_grab_root(gang[i]); 4277ef67963dSJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 4278ef67963dSJosef Bacik 4279ef67963dSJosef Bacik for (i = 0; i < ret; i++) { 4280ef67963dSJosef Bacik if (!gang[i]) 4281ef67963dSJosef Bacik continue; 4282ef67963dSJosef Bacik root_objectid = gang[i]->root_key.objectid; 4283ef67963dSJosef Bacik btrfs_free_log(NULL, gang[i]); 4284ef67963dSJosef Bacik btrfs_put_root(gang[i]); 4285ef67963dSJosef Bacik } 4286ef67963dSJosef Bacik root_objectid++; 4287ef67963dSJosef Bacik spin_lock(&fs_info->fs_roots_radix_lock); 4288ef67963dSJosef Bacik } 4289ef67963dSJosef Bacik spin_unlock(&fs_info->fs_roots_radix_lock); 4290ef67963dSJosef Bacik btrfs_free_log_root_tree(NULL, fs_info); 4291ef67963dSJosef Bacik } 4292ef67963dSJosef Bacik 4293143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4294acce952bSliubo { 4295acce952bSliubo struct btrfs_ordered_extent *ordered; 4296acce952bSliubo 4297199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4298779880efSJosef Bacik /* 4299779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4300779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4301779880efSJosef Bacik */ 4302199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4303779880efSJosef Bacik root_extent_list) 4304779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4305199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4306199c2a9cSMiao Xie } 4307199c2a9cSMiao Xie 4308199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4309199c2a9cSMiao Xie { 4310199c2a9cSMiao Xie struct btrfs_root *root; 4311199c2a9cSMiao Xie struct list_head splice; 4312199c2a9cSMiao Xie 4313199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4314199c2a9cSMiao Xie 4315199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4316199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4317199c2a9cSMiao Xie while (!list_empty(&splice)) { 4318199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4319199c2a9cSMiao Xie ordered_root); 43201de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 43211de2cfdeSJosef Bacik &fs_info->ordered_roots); 4322199c2a9cSMiao Xie 43232a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4324199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4325199c2a9cSMiao Xie 43262a85d9caSLiu Bo cond_resched(); 43272a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4328199c2a9cSMiao Xie } 4329199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 433074d5d229SJosef Bacik 433174d5d229SJosef Bacik /* 433274d5d229SJosef Bacik * We need this here because if we've been flipped read-only we won't 433374d5d229SJosef Bacik * get sync() from the umount, so we need to make sure any ordered 433474d5d229SJosef Bacik * extents that haven't had their dirty pages IO start writeout yet 433574d5d229SJosef Bacik * actually get run and error out properly. 433674d5d229SJosef Bacik */ 433774d5d229SJosef Bacik btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1); 4338acce952bSliubo } 4339acce952bSliubo 434035a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 43412ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4342acce952bSliubo { 4343acce952bSliubo struct rb_node *node; 4344acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4345acce952bSliubo struct btrfs_delayed_ref_node *ref; 4346acce952bSliubo int ret = 0; 4347acce952bSliubo 4348acce952bSliubo delayed_refs = &trans->delayed_refs; 4349acce952bSliubo 4350acce952bSliubo spin_lock(&delayed_refs->lock); 4351d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4352cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 4353b79ce3ddSDavid Sterba btrfs_debug(fs_info, "delayed_refs has NO entry"); 4354acce952bSliubo return ret; 4355acce952bSliubo } 4356acce952bSliubo 43575c9d028bSLiu Bo while ((node = rb_first_cached(&delayed_refs->href_root)) != NULL) { 4358d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 43590e0adbcfSJosef Bacik struct rb_node *n; 4360e78417d1SJosef Bacik bool pin_bytes = false; 4361acce952bSliubo 4362d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4363d7df2c79SJosef Bacik href_node); 43643069bd26SJosef Bacik if (btrfs_delayed_ref_lock(delayed_refs, head)) 4365b939d1abSJosef Bacik continue; 43663069bd26SJosef Bacik 4367d7df2c79SJosef Bacik spin_lock(&head->lock); 4368e3d03965SLiu Bo while ((n = rb_first_cached(&head->ref_tree)) != NULL) { 43690e0adbcfSJosef Bacik ref = rb_entry(n, struct btrfs_delayed_ref_node, 43700e0adbcfSJosef Bacik ref_node); 4371d7df2c79SJosef Bacik ref->in_tree = 0; 4372e3d03965SLiu Bo rb_erase_cached(&ref->ref_node, &head->ref_tree); 43730e0adbcfSJosef Bacik RB_CLEAR_NODE(&ref->ref_node); 43741d57ee94SWang Xiaoguang if (!list_empty(&ref->add_list)) 43751d57ee94SWang Xiaoguang list_del(&ref->add_list); 4376d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4377d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4378d7df2c79SJosef Bacik } 437954067ae9SJosef Bacik if (head->must_insert_reserved) 4380e78417d1SJosef Bacik pin_bytes = true; 438178a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4382fa781ceaSJosef Bacik btrfs_delete_ref_head(delayed_refs, head); 4383d7df2c79SJosef Bacik spin_unlock(&head->lock); 4384acce952bSliubo spin_unlock(&delayed_refs->lock); 4385e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4386acce952bSliubo 4387f603bb94SNikolay Borisov if (pin_bytes) { 4388f603bb94SNikolay Borisov struct btrfs_block_group *cache; 4389f603bb94SNikolay Borisov 4390f603bb94SNikolay Borisov cache = btrfs_lookup_block_group(fs_info, head->bytenr); 4391f603bb94SNikolay Borisov BUG_ON(!cache); 4392f603bb94SNikolay Borisov 4393f603bb94SNikolay Borisov spin_lock(&cache->space_info->lock); 4394f603bb94SNikolay Borisov spin_lock(&cache->lock); 4395f603bb94SNikolay Borisov cache->pinned += head->num_bytes; 4396f603bb94SNikolay Borisov btrfs_space_info_update_bytes_pinned(fs_info, 4397f603bb94SNikolay Borisov cache->space_info, head->num_bytes); 4398f603bb94SNikolay Borisov cache->reserved -= head->num_bytes; 4399f603bb94SNikolay Borisov cache->space_info->bytes_reserved -= head->num_bytes; 4400f603bb94SNikolay Borisov spin_unlock(&cache->lock); 4401f603bb94SNikolay Borisov spin_unlock(&cache->space_info->lock); 4402f603bb94SNikolay Borisov percpu_counter_add_batch( 4403f603bb94SNikolay Borisov &cache->space_info->total_bytes_pinned, 4404f603bb94SNikolay Borisov head->num_bytes, BTRFS_TOTAL_BYTES_PINNED_BATCH); 4405f603bb94SNikolay Borisov 4406f603bb94SNikolay Borisov btrfs_put_block_group(cache); 4407f603bb94SNikolay Borisov 4408f603bb94SNikolay Borisov btrfs_error_unpin_extent_range(fs_info, head->bytenr, 4409f603bb94SNikolay Borisov head->bytenr + head->num_bytes - 1); 4410f603bb94SNikolay Borisov } 441131890da0SJosef Bacik btrfs_cleanup_ref_head_accounting(fs_info, delayed_refs, head); 4412d278850eSJosef Bacik btrfs_put_delayed_ref_head(head); 4413acce952bSliubo cond_resched(); 4414acce952bSliubo spin_lock(&delayed_refs->lock); 4415acce952bSliubo } 441681f7eb00SJeff Mahoney btrfs_qgroup_destroy_extent_records(trans); 4417acce952bSliubo 4418acce952bSliubo spin_unlock(&delayed_refs->lock); 4419acce952bSliubo 4420acce952bSliubo return ret; 4421acce952bSliubo } 4422acce952bSliubo 4423143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4424acce952bSliubo { 4425acce952bSliubo struct btrfs_inode *btrfs_inode; 4426acce952bSliubo struct list_head splice; 4427acce952bSliubo 4428acce952bSliubo INIT_LIST_HEAD(&splice); 4429acce952bSliubo 4430eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4431eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4432acce952bSliubo 4433acce952bSliubo while (!list_empty(&splice)) { 4434fe816d0fSNikolay Borisov struct inode *inode = NULL; 4435eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4436acce952bSliubo delalloc_inodes); 4437fe816d0fSNikolay Borisov __btrfs_del_delalloc_inode(root, btrfs_inode); 4438eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4439acce952bSliubo 4440fe816d0fSNikolay Borisov /* 4441fe816d0fSNikolay Borisov * Make sure we get a live inode and that it'll not disappear 4442fe816d0fSNikolay Borisov * meanwhile. 4443fe816d0fSNikolay Borisov */ 4444fe816d0fSNikolay Borisov inode = igrab(&btrfs_inode->vfs_inode); 4445fe816d0fSNikolay Borisov if (inode) { 4446fe816d0fSNikolay Borisov invalidate_inode_pages2(inode->i_mapping); 4447fe816d0fSNikolay Borisov iput(inode); 4448fe816d0fSNikolay Borisov } 4449eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4450acce952bSliubo } 4451eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4452eb73c1b7SMiao Xie } 4453eb73c1b7SMiao Xie 4454eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4455eb73c1b7SMiao Xie { 4456eb73c1b7SMiao Xie struct btrfs_root *root; 4457eb73c1b7SMiao Xie struct list_head splice; 4458eb73c1b7SMiao Xie 4459eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4460eb73c1b7SMiao Xie 4461eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4462eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4463eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4464eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4465eb73c1b7SMiao Xie delalloc_root); 446600246528SJosef Bacik root = btrfs_grab_root(root); 4467eb73c1b7SMiao Xie BUG_ON(!root); 4468eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4469eb73c1b7SMiao Xie 4470eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 447100246528SJosef Bacik btrfs_put_root(root); 4472eb73c1b7SMiao Xie 4473eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4474eb73c1b7SMiao Xie } 4475eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4476acce952bSliubo } 4477acce952bSliubo 44782ff7e61eSJeff Mahoney static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, 4479acce952bSliubo struct extent_io_tree *dirty_pages, 4480acce952bSliubo int mark) 4481acce952bSliubo { 4482acce952bSliubo int ret; 4483acce952bSliubo struct extent_buffer *eb; 4484acce952bSliubo u64 start = 0; 4485acce952bSliubo u64 end; 4486acce952bSliubo 4487acce952bSliubo while (1) { 4488acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4489e6138876SJosef Bacik mark, NULL); 4490acce952bSliubo if (ret) 4491acce952bSliubo break; 4492acce952bSliubo 449391166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4494acce952bSliubo while (start <= end) { 44950b246afaSJeff Mahoney eb = find_extent_buffer(fs_info, start); 44960b246afaSJeff Mahoney start += fs_info->nodesize; 4497fd8b2b61SJosef Bacik if (!eb) 4498acce952bSliubo continue; 4499fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4500acce952bSliubo 4501fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4502fd8b2b61SJosef Bacik &eb->bflags)) 4503fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4504fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4505acce952bSliubo } 4506acce952bSliubo } 4507acce952bSliubo 4508acce952bSliubo return ret; 4509acce952bSliubo } 4510acce952bSliubo 45112ff7e61eSJeff Mahoney static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, 4512fe119a6eSNikolay Borisov struct extent_io_tree *unpin) 4513acce952bSliubo { 4514acce952bSliubo u64 start; 4515acce952bSliubo u64 end; 4516acce952bSliubo int ret; 4517acce952bSliubo 4518acce952bSliubo while (1) { 45190e6ec385SFilipe Manana struct extent_state *cached_state = NULL; 45200e6ec385SFilipe Manana 4521fcd5e742SLu Fengqi /* 4522fcd5e742SLu Fengqi * The btrfs_finish_extent_commit() may get the same range as 4523fcd5e742SLu Fengqi * ours between find_first_extent_bit and clear_extent_dirty. 4524fcd5e742SLu Fengqi * Hence, hold the unused_bg_unpin_mutex to avoid double unpin 4525fcd5e742SLu Fengqi * the same extent range. 4526fcd5e742SLu Fengqi */ 4527fcd5e742SLu Fengqi mutex_lock(&fs_info->unused_bg_unpin_mutex); 4528acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 45290e6ec385SFilipe Manana EXTENT_DIRTY, &cached_state); 4530fcd5e742SLu Fengqi if (ret) { 4531fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4532acce952bSliubo break; 4533fcd5e742SLu Fengqi } 4534acce952bSliubo 45350e6ec385SFilipe Manana clear_extent_dirty(unpin, start, end, &cached_state); 45360e6ec385SFilipe Manana free_extent_state(cached_state); 45372ff7e61eSJeff Mahoney btrfs_error_unpin_extent_range(fs_info, start, end); 4538fcd5e742SLu Fengqi mutex_unlock(&fs_info->unused_bg_unpin_mutex); 4539acce952bSliubo cond_resched(); 4540acce952bSliubo } 4541acce952bSliubo 4542acce952bSliubo return 0; 4543acce952bSliubo } 4544acce952bSliubo 454532da5386SDavid Sterba static void btrfs_cleanup_bg_io(struct btrfs_block_group *cache) 4546c79a1751SLiu Bo { 4547c79a1751SLiu Bo struct inode *inode; 4548c79a1751SLiu Bo 4549c79a1751SLiu Bo inode = cache->io_ctl.inode; 4550c79a1751SLiu Bo if (inode) { 4551c79a1751SLiu Bo invalidate_inode_pages2(inode->i_mapping); 4552c79a1751SLiu Bo BTRFS_I(inode)->generation = 0; 4553c79a1751SLiu Bo cache->io_ctl.inode = NULL; 4554c79a1751SLiu Bo iput(inode); 4555c79a1751SLiu Bo } 4556bbc37d6eSFilipe Manana ASSERT(cache->io_ctl.pages == NULL); 4557c79a1751SLiu Bo btrfs_put_block_group(cache); 4558c79a1751SLiu Bo } 4559c79a1751SLiu Bo 4560c79a1751SLiu Bo void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, 45612ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 4562c79a1751SLiu Bo { 456332da5386SDavid Sterba struct btrfs_block_group *cache; 4564c79a1751SLiu Bo 4565c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4566c79a1751SLiu Bo while (!list_empty(&cur_trans->dirty_bgs)) { 4567c79a1751SLiu Bo cache = list_first_entry(&cur_trans->dirty_bgs, 456832da5386SDavid Sterba struct btrfs_block_group, 4569c79a1751SLiu Bo dirty_list); 4570c79a1751SLiu Bo 4571c79a1751SLiu Bo if (!list_empty(&cache->io_list)) { 4572c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4573c79a1751SLiu Bo list_del_init(&cache->io_list); 4574c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4575c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4576c79a1751SLiu Bo } 4577c79a1751SLiu Bo 4578c79a1751SLiu Bo list_del_init(&cache->dirty_list); 4579c79a1751SLiu Bo spin_lock(&cache->lock); 4580c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4581c79a1751SLiu Bo spin_unlock(&cache->lock); 4582c79a1751SLiu Bo 4583c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4584c79a1751SLiu Bo btrfs_put_block_group(cache); 4585ba2c4d4eSJosef Bacik btrfs_delayed_refs_rsv_release(fs_info, 1); 4586c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4587c79a1751SLiu Bo } 4588c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4589c79a1751SLiu Bo 459045ae2c18SNikolay Borisov /* 459145ae2c18SNikolay Borisov * Refer to the definition of io_bgs member for details why it's safe 459245ae2c18SNikolay Borisov * to use it without any locking 459345ae2c18SNikolay Borisov */ 4594c79a1751SLiu Bo while (!list_empty(&cur_trans->io_bgs)) { 4595c79a1751SLiu Bo cache = list_first_entry(&cur_trans->io_bgs, 459632da5386SDavid Sterba struct btrfs_block_group, 4597c79a1751SLiu Bo io_list); 4598c79a1751SLiu Bo 4599c79a1751SLiu Bo list_del_init(&cache->io_list); 4600c79a1751SLiu Bo spin_lock(&cache->lock); 4601c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4602c79a1751SLiu Bo spin_unlock(&cache->lock); 4603c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4604c79a1751SLiu Bo } 4605c79a1751SLiu Bo } 4606c79a1751SLiu Bo 460749b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 46082ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info) 460949b25e05SJeff Mahoney { 4610bbbf7243SNikolay Borisov struct btrfs_device *dev, *tmp; 4611bbbf7243SNikolay Borisov 46122ff7e61eSJeff Mahoney btrfs_cleanup_dirty_bgs(cur_trans, fs_info); 4613c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->dirty_bgs)); 4614c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->io_bgs)); 4615c79a1751SLiu Bo 4616bbbf7243SNikolay Borisov list_for_each_entry_safe(dev, tmp, &cur_trans->dev_update_list, 4617bbbf7243SNikolay Borisov post_commit_list) { 4618bbbf7243SNikolay Borisov list_del_init(&dev->post_commit_list); 4619bbbf7243SNikolay Borisov } 4620bbbf7243SNikolay Borisov 46212ff7e61eSJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, fs_info); 462249b25e05SJeff Mahoney 46234a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 46240b246afaSJeff Mahoney wake_up(&fs_info->transaction_blocked_wait); 462549b25e05SJeff Mahoney 46264a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 46270b246afaSJeff Mahoney wake_up(&fs_info->transaction_wait); 462849b25e05SJeff Mahoney 4629ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 463067cde344SMiao Xie 46312ff7e61eSJeff Mahoney btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages, 463249b25e05SJeff Mahoney EXTENT_DIRTY); 4633fe119a6eSNikolay Borisov btrfs_destroy_pinned_extent(fs_info, &cur_trans->pinned_extents); 463449b25e05SJeff Mahoney 46354a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 46364a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 463749b25e05SJeff Mahoney } 463849b25e05SJeff Mahoney 46392ff7e61eSJeff Mahoney static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info) 4640acce952bSliubo { 4641acce952bSliubo struct btrfs_transaction *t; 4642acce952bSliubo 46430b246afaSJeff Mahoney mutex_lock(&fs_info->transaction_kthread_mutex); 4644acce952bSliubo 46450b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 46460b246afaSJeff Mahoney while (!list_empty(&fs_info->trans_list)) { 46470b246afaSJeff Mahoney t = list_first_entry(&fs_info->trans_list, 4648724e2315SJosef Bacik struct btrfs_transaction, list); 4649724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 46509b64f57dSElena Reshetova refcount_inc(&t->use_count); 46510b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 46522ff7e61eSJeff Mahoney btrfs_wait_for_commit(fs_info, t->transid); 4653724e2315SJosef Bacik btrfs_put_transaction(t); 46540b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4655724e2315SJosef Bacik continue; 4656724e2315SJosef Bacik } 46570b246afaSJeff Mahoney if (t == fs_info->running_transaction) { 4658724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 46590b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4660724e2315SJosef Bacik /* 4661724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4662724e2315SJosef Bacik * handle open currently for this transaction. 4663724e2315SJosef Bacik */ 4664724e2315SJosef Bacik wait_event(t->writer_wait, 4665724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4666724e2315SJosef Bacik } else { 46670b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4668724e2315SJosef Bacik } 46692ff7e61eSJeff Mahoney btrfs_cleanup_one_transaction(t, fs_info); 4670724e2315SJosef Bacik 46710b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 46720b246afaSJeff Mahoney if (t == fs_info->running_transaction) 46730b246afaSJeff Mahoney fs_info->running_transaction = NULL; 4674724e2315SJosef Bacik list_del_init(&t->list); 46750b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 4676a4abeea4SJosef Bacik 4677724e2315SJosef Bacik btrfs_put_transaction(t); 46782ff7e61eSJeff Mahoney trace_btrfs_transaction_commit(fs_info->tree_root); 46790b246afaSJeff Mahoney spin_lock(&fs_info->trans_lock); 4680724e2315SJosef Bacik } 46810b246afaSJeff Mahoney spin_unlock(&fs_info->trans_lock); 46820b246afaSJeff Mahoney btrfs_destroy_all_ordered_extents(fs_info); 4683ccdf9b30SJeff Mahoney btrfs_destroy_delayed_inodes(fs_info); 4684ccdf9b30SJeff Mahoney btrfs_assert_delayed_root_empty(fs_info); 46850b246afaSJeff Mahoney btrfs_destroy_all_delalloc_inodes(fs_info); 4686ef67963dSJosef Bacik btrfs_drop_all_logs(fs_info); 46870b246afaSJeff Mahoney mutex_unlock(&fs_info->transaction_kthread_mutex); 4688acce952bSliubo 4689acce952bSliubo return 0; 4690acce952bSliubo } 4691acce952bSliubo 4692e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 46934d53dddbSDavid Sterba /* mandatory callbacks */ 46940b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 46954d53dddbSDavid Sterba .readpage_end_io_hook = btree_readpage_end_io_hook, 46960da5468fSChris Mason }; 4697