16cbd5570SChris Mason /* 26cbd5570SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 36cbd5570SChris Mason * 46cbd5570SChris Mason * This program is free software; you can redistribute it and/or 56cbd5570SChris Mason * modify it under the terms of the GNU General Public 66cbd5570SChris Mason * License v2 as published by the Free Software Foundation. 76cbd5570SChris Mason * 86cbd5570SChris Mason * This program is distributed in the hope that it will be useful, 96cbd5570SChris Mason * but WITHOUT ANY WARRANTY; without even the implied warranty of 106cbd5570SChris Mason * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 116cbd5570SChris Mason * General Public License for more details. 126cbd5570SChris Mason * 136cbd5570SChris Mason * You should have received a copy of the GNU General Public 146cbd5570SChris Mason * License along with this program; if not, write to the 156cbd5570SChris Mason * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 166cbd5570SChris Mason * Boston, MA 021110-1307, USA. 176cbd5570SChris Mason */ 186cbd5570SChris Mason 19e20d96d6SChris Mason #include <linux/fs.h> 20d98237b3SChris Mason #include <linux/blkdev.h> 2187cbda5cSChris Mason #include <linux/scatterlist.h> 2222b0ebdaSChris Mason #include <linux/swap.h> 230f7d52f4SChris Mason #include <linux/radix-tree.h> 2435b7e476SChris Mason #include <linux/writeback.h> 25d397712bSChris Mason #include <linux/buffer_head.h> 26ce9adaa5SChris Mason #include <linux/workqueue.h> 27a74a4b97SChris Mason #include <linux/kthread.h> 285a0e3ad6STejun Heo #include <linux/slab.h> 29784b4e29SChris Mason #include <linux/migrate.h> 307a36ddecSDavid Sterba #include <linux/ratelimit.h> 316463fe58SStefan Behrens #include <linux/uuid.h> 32803b2f54SStefan Behrens #include <linux/semaphore.h> 337e75bf3fSDavid Sterba #include <asm/unaligned.h> 34eb60ceacSChris Mason #include "ctree.h" 35eb60ceacSChris Mason #include "disk-io.h" 360b947affSFilipe David Borba Manana #include "hash.h" 37e089f05cSChris Mason #include "transaction.h" 380f7d52f4SChris Mason #include "btrfs_inode.h" 390b86a832SChris Mason #include "volumes.h" 40db94535dSChris Mason #include "print-tree.h" 41925baeddSChris Mason #include "locking.h" 42e02119d5SChris Mason #include "tree-log.h" 43fa9c0d79SChris Mason #include "free-space-cache.h" 4470f6d82eSOmar Sandoval #include "free-space-tree.h" 45581bb050SLi Zefan #include "inode-map.h" 4621adbd5cSStefan Behrens #include "check-integrity.h" 47606686eeSJosef Bacik #include "rcu-string.h" 488dabb742SStefan Behrens #include "dev-replace.h" 4953b381b3SDavid Woodhouse #include "raid56.h" 505ac1d209SJeff Mahoney #include "sysfs.h" 51fcebe456SJosef Bacik #include "qgroup.h" 52ebb8765bSAnand Jain #include "compression.h" 53eb60ceacSChris Mason 54de0022b9SJosef Bacik #ifdef CONFIG_X86 55de0022b9SJosef Bacik #include <asm/cpufeature.h> 56de0022b9SJosef Bacik #endif 57de0022b9SJosef Bacik 58319e4d06SQu Wenruo #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ 59319e4d06SQu Wenruo BTRFS_HEADER_FLAG_RELOC |\ 60319e4d06SQu Wenruo BTRFS_SUPER_FLAG_ERROR |\ 61319e4d06SQu Wenruo BTRFS_SUPER_FLAG_SEEDING |\ 62319e4d06SQu Wenruo BTRFS_SUPER_FLAG_METADUMP) 63319e4d06SQu Wenruo 64e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops; 658b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 664df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 67fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 68acce952bSliubo int read_only); 69143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 70acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 71acce952bSliubo struct btrfs_root *root); 72143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 73acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 74acce952bSliubo struct extent_io_tree *dirty_pages, 75acce952bSliubo int mark); 76acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 77acce952bSliubo struct extent_io_tree *pinned_extents); 7848a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root); 7948a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root); 80ce9adaa5SChris Mason 81d352ac68SChris Mason /* 8297eb6b69SDavid Sterba * btrfs_end_io_wq structs are used to do processing in task context when an IO 8397eb6b69SDavid Sterba * is complete. This is used during reads to verify checksums, and it is used 84d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 85d352ac68SChris Mason */ 8697eb6b69SDavid Sterba struct btrfs_end_io_wq { 87ce9adaa5SChris Mason struct bio *bio; 88ce9adaa5SChris Mason bio_end_io_t *end_io; 89ce9adaa5SChris Mason void *private; 90ce9adaa5SChris Mason struct btrfs_fs_info *info; 91ce9adaa5SChris Mason int error; 92bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata; 93ce9adaa5SChris Mason struct list_head list; 948b712842SChris Mason struct btrfs_work work; 95ce9adaa5SChris Mason }; 960da5468fSChris Mason 9797eb6b69SDavid Sterba static struct kmem_cache *btrfs_end_io_wq_cache; 9897eb6b69SDavid Sterba 9997eb6b69SDavid Sterba int __init btrfs_end_io_wq_init(void) 10097eb6b69SDavid Sterba { 10197eb6b69SDavid Sterba btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", 10297eb6b69SDavid Sterba sizeof(struct btrfs_end_io_wq), 10397eb6b69SDavid Sterba 0, 104fba4b697SNikolay Borisov SLAB_MEM_SPREAD, 10597eb6b69SDavid Sterba NULL); 10697eb6b69SDavid Sterba if (!btrfs_end_io_wq_cache) 10797eb6b69SDavid Sterba return -ENOMEM; 10897eb6b69SDavid Sterba return 0; 10997eb6b69SDavid Sterba } 11097eb6b69SDavid Sterba 11197eb6b69SDavid Sterba void btrfs_end_io_wq_exit(void) 11297eb6b69SDavid Sterba { 11397eb6b69SDavid Sterba kmem_cache_destroy(btrfs_end_io_wq_cache); 11497eb6b69SDavid Sterba } 11597eb6b69SDavid Sterba 116d352ac68SChris Mason /* 117d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 118d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 119d352ac68SChris Mason * just before they are sent down the IO stack. 120d352ac68SChris Mason */ 12144b8bd7eSChris Mason struct async_submit_bio { 12244b8bd7eSChris Mason struct inode *inode; 12344b8bd7eSChris Mason struct bio *bio; 12444b8bd7eSChris Mason struct list_head list; 1254a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 1264a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 12744b8bd7eSChris Mason int mirror_num; 128c8b97818SChris Mason unsigned long bio_flags; 129eaf25d93SChris Mason /* 130eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 131eaf25d93SChris Mason * can't tell us where in the file the bio should go 132eaf25d93SChris Mason */ 133eaf25d93SChris Mason u64 bio_offset; 1348b712842SChris Mason struct btrfs_work work; 13579787eaaSJeff Mahoney int error; 13644b8bd7eSChris Mason }; 13744b8bd7eSChris Mason 13885d4e461SChris Mason /* 13985d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 14085d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 14185d4e461SChris Mason * the level the eb occupies in the tree. 1424008c04aSChris Mason * 14385d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 14485d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 14585d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 14685d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 14785d4e461SChris Mason * have separate keysets. 1484008c04aSChris Mason * 14985d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 15085d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 15185d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1524008c04aSChris Mason * 15385d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 15485d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 15585d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 15685d4e461SChris Mason * 15785d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 15885d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 15985d4e461SChris Mason * needs update as well. 1604008c04aSChris Mason */ 1614008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1624008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1634008c04aSChris Mason # error 1644008c04aSChris Mason # endif 16585d4e461SChris Mason 16685d4e461SChris Mason static struct btrfs_lockdep_keyset { 16785d4e461SChris Mason u64 id; /* root objectid */ 16885d4e461SChris Mason const char *name_stem; /* lock name stem */ 16985d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 17085d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 17185d4e461SChris Mason } btrfs_lockdep_keysets[] = { 17285d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 17385d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 17485d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 17585d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 17685d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 17785d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 17860b62978SDavid Sterba { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, 17985d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 18085d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 18185d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 18213fd8da9SDavid Sterba { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, 1836b20e0adSDavid Sterba { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, 18485d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1854008c04aSChris Mason }; 18685d4e461SChris Mason 18785d4e461SChris Mason void __init btrfs_init_lockdep(void) 18885d4e461SChris Mason { 18985d4e461SChris Mason int i, j; 19085d4e461SChris Mason 19185d4e461SChris Mason /* initialize lockdep class names */ 19285d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 19385d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 19485d4e461SChris Mason 19585d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 19685d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 19785d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 19885d4e461SChris Mason } 19985d4e461SChris Mason } 20085d4e461SChris Mason 20185d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 20285d4e461SChris Mason int level) 20385d4e461SChris Mason { 20485d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 20585d4e461SChris Mason 20685d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 20785d4e461SChris Mason 20885d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 20985d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 21085d4e461SChris Mason if (ks->id == objectid) 21185d4e461SChris Mason break; 21285d4e461SChris Mason 21385d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 21485d4e461SChris Mason &ks->keys[level], ks->names[level]); 21585d4e461SChris Mason } 21685d4e461SChris Mason 2174008c04aSChris Mason #endif 2184008c04aSChris Mason 219d352ac68SChris Mason /* 220d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 221d352ac68SChris Mason * that covers the entire device 222d352ac68SChris Mason */ 223b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 224306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 2255f39d397SChris Mason int create) 2265f39d397SChris Mason { 2275f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 2285f39d397SChris Mason struct extent_map *em; 2295f39d397SChris Mason int ret; 2305f39d397SChris Mason 231890871beSChris Mason read_lock(&em_tree->lock); 232d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 233a061fc8dSChris Mason if (em) { 234a061fc8dSChris Mason em->bdev = 235a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 236890871beSChris Mason read_unlock(&em_tree->lock); 2375f39d397SChris Mason goto out; 238a061fc8dSChris Mason } 239890871beSChris Mason read_unlock(&em_tree->lock); 2407b13b7b1SChris Mason 241172ddd60SDavid Sterba em = alloc_extent_map(); 2425f39d397SChris Mason if (!em) { 2435f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2445f39d397SChris Mason goto out; 2455f39d397SChris Mason } 2465f39d397SChris Mason em->start = 0; 2470afbaf8cSChris Mason em->len = (u64)-1; 248c8b97818SChris Mason em->block_len = (u64)-1; 2495f39d397SChris Mason em->block_start = 0; 250a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 251d1310b2eSChris Mason 252890871beSChris Mason write_lock(&em_tree->lock); 25309a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2545f39d397SChris Mason if (ret == -EEXIST) { 2555f39d397SChris Mason free_extent_map(em); 2567b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 257b4f359abSTsutomu Itoh if (!em) 2580433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2595f39d397SChris Mason } else if (ret) { 2607b13b7b1SChris Mason free_extent_map(em); 2610433f20dSTsutomu Itoh em = ERR_PTR(ret); 2625f39d397SChris Mason } 263890871beSChris Mason write_unlock(&em_tree->lock); 2647b13b7b1SChris Mason 2655f39d397SChris Mason out: 2665f39d397SChris Mason return em; 2675f39d397SChris Mason } 2685f39d397SChris Mason 269b0496686SLiu Bo u32 btrfs_csum_data(char *data, u32 seed, size_t len) 27019c00ddcSChris Mason { 2710b947affSFilipe David Borba Manana return btrfs_crc32c(seed, data, len); 27219c00ddcSChris Mason } 27319c00ddcSChris Mason 27419c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 27519c00ddcSChris Mason { 2767e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 27719c00ddcSChris Mason } 27819c00ddcSChris Mason 279d352ac68SChris Mason /* 280d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 281d352ac68SChris Mason * into the csum field of the block. 282d352ac68SChris Mason */ 28301d58472SDaniel Dressler static int csum_tree_block(struct btrfs_fs_info *fs_info, 28401d58472SDaniel Dressler struct extent_buffer *buf, 28519c00ddcSChris Mason int verify) 28619c00ddcSChris Mason { 28701d58472SDaniel Dressler u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 288607d432dSJosef Bacik char *result = NULL; 28919c00ddcSChris Mason unsigned long len; 29019c00ddcSChris Mason unsigned long cur_len; 29119c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 29219c00ddcSChris Mason char *kaddr; 29319c00ddcSChris Mason unsigned long map_start; 29419c00ddcSChris Mason unsigned long map_len; 29519c00ddcSChris Mason int err; 29619c00ddcSChris Mason u32 crc = ~(u32)0; 297607d432dSJosef Bacik unsigned long inline_result; 29819c00ddcSChris Mason 29919c00ddcSChris Mason len = buf->len - offset; 30019c00ddcSChris Mason while (len > 0) { 30119c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 302a6591715SChris Mason &kaddr, &map_start, &map_len); 303d397712bSChris Mason if (err) 3048bd98f0eSAlex Lyakas return err; 30519c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 306b0496686SLiu Bo crc = btrfs_csum_data(kaddr + offset - map_start, 30719c00ddcSChris Mason crc, cur_len); 30819c00ddcSChris Mason len -= cur_len; 30919c00ddcSChris Mason offset += cur_len; 31019c00ddcSChris Mason } 311607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 31231e818feSDavid Sterba result = kzalloc(csum_size, GFP_NOFS); 313607d432dSJosef Bacik if (!result) 3148bd98f0eSAlex Lyakas return -ENOMEM; 315607d432dSJosef Bacik } else { 316607d432dSJosef Bacik result = (char *)&inline_result; 317607d432dSJosef Bacik } 318607d432dSJosef Bacik 31919c00ddcSChris Mason btrfs_csum_final(crc, result); 32019c00ddcSChris Mason 32119c00ddcSChris Mason if (verify) { 322607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 323e4204dedSChris Mason u32 val; 324e4204dedSChris Mason u32 found = 0; 325607d432dSJosef Bacik memcpy(&found, result, csum_size); 326e4204dedSChris Mason 327607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 32894647322SDavid Sterba btrfs_warn_rl(fs_info, 3295d163e0eSJeff Mahoney "%s checksum verify failed on %llu wanted %X found %X level %d", 33001d58472SDaniel Dressler fs_info->sb->s_id, buf->start, 331c1c9ff7cSGeert Uytterhoeven val, found, btrfs_header_level(buf)); 332607d432dSJosef Bacik if (result != (char *)&inline_result) 333607d432dSJosef Bacik kfree(result); 3348bd98f0eSAlex Lyakas return -EUCLEAN; 33519c00ddcSChris Mason } 33619c00ddcSChris Mason } else { 337607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 33819c00ddcSChris Mason } 339607d432dSJosef Bacik if (result != (char *)&inline_result) 340607d432dSJosef Bacik kfree(result); 34119c00ddcSChris Mason return 0; 34219c00ddcSChris Mason } 34319c00ddcSChris Mason 344d352ac68SChris Mason /* 345d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 346d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 347d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 348d352ac68SChris Mason * in the wrong place. 349d352ac68SChris Mason */ 3501259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 351b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 352b9fab919SChris Mason int atomic) 3531259ab75SChris Mason { 3542ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3551259ab75SChris Mason int ret; 3562755a0deSDavid Sterba bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); 3571259ab75SChris Mason 3581259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3591259ab75SChris Mason return 0; 3601259ab75SChris Mason 361b9fab919SChris Mason if (atomic) 362b9fab919SChris Mason return -EAGAIN; 363b9fab919SChris Mason 364a26e8c9fSJosef Bacik if (need_lock) { 365a26e8c9fSJosef Bacik btrfs_tree_read_lock(eb); 366a26e8c9fSJosef Bacik btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); 367a26e8c9fSJosef Bacik } 368a26e8c9fSJosef Bacik 3692ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 370ff13db41SDavid Sterba &cached_state); 3710b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3721259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3731259ab75SChris Mason ret = 0; 3741259ab75SChris Mason goto out; 3751259ab75SChris Mason } 37694647322SDavid Sterba btrfs_err_rl(eb->fs_info, 37794647322SDavid Sterba "parent transid verify failed on %llu wanted %llu found %llu", 37894647322SDavid Sterba eb->start, 37929549aecSWang Shilong parent_transid, btrfs_header_generation(eb)); 3801259ab75SChris Mason ret = 1; 381a26e8c9fSJosef Bacik 382a26e8c9fSJosef Bacik /* 383a26e8c9fSJosef Bacik * Things reading via commit roots that don't have normal protection, 384a26e8c9fSJosef Bacik * like send, can have a really old block in cache that may point at a 38501327610SNicholas D Steeves * block that has been freed and re-allocated. So don't clear uptodate 386a26e8c9fSJosef Bacik * if we find an eb that is under IO (dirty/writeback) because we could 387a26e8c9fSJosef Bacik * end up reading in the stale data and then writing it back out and 388a26e8c9fSJosef Bacik * making everybody very sad. 389a26e8c9fSJosef Bacik */ 390a26e8c9fSJosef Bacik if (!extent_buffer_under_io(eb)) 3910b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 39233958dc6SChris Mason out: 3932ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3942ac55d41SJosef Bacik &cached_state, GFP_NOFS); 395472b909fSJosef Bacik if (need_lock) 396a26e8c9fSJosef Bacik btrfs_tree_read_unlock_blocking(eb); 3971259ab75SChris Mason return ret; 3981259ab75SChris Mason } 3991259ab75SChris Mason 400d352ac68SChris Mason /* 4011104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 4021104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 4031104a885SDavid Sterba */ 404ab8d0fc4SJeff Mahoney static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, 405ab8d0fc4SJeff Mahoney char *raw_disk_sb) 4061104a885SDavid Sterba { 4071104a885SDavid Sterba struct btrfs_super_block *disk_sb = 4081104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 4091104a885SDavid Sterba u16 csum_type = btrfs_super_csum_type(disk_sb); 4101104a885SDavid Sterba int ret = 0; 4111104a885SDavid Sterba 4121104a885SDavid Sterba if (csum_type == BTRFS_CSUM_TYPE_CRC32) { 4131104a885SDavid Sterba u32 crc = ~(u32)0; 4141104a885SDavid Sterba const int csum_size = sizeof(crc); 4151104a885SDavid Sterba char result[csum_size]; 4161104a885SDavid Sterba 4171104a885SDavid Sterba /* 4181104a885SDavid Sterba * The super_block structure does not span the whole 4191104a885SDavid Sterba * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space 42001327610SNicholas D Steeves * is filled with zeros and is included in the checksum. 4211104a885SDavid Sterba */ 4221104a885SDavid Sterba crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, 4231104a885SDavid Sterba crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 4241104a885SDavid Sterba btrfs_csum_final(crc, result); 4251104a885SDavid Sterba 4261104a885SDavid Sterba if (memcmp(raw_disk_sb, result, csum_size)) 4271104a885SDavid Sterba ret = 1; 4281104a885SDavid Sterba } 4291104a885SDavid Sterba 4301104a885SDavid Sterba if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { 431ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "unsupported checksum algorithm %u", 4321104a885SDavid Sterba csum_type); 4331104a885SDavid Sterba ret = 1; 4341104a885SDavid Sterba } 4351104a885SDavid Sterba 4361104a885SDavid Sterba return ret; 4371104a885SDavid Sterba } 4381104a885SDavid Sterba 4391104a885SDavid Sterba /* 440d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 441d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 442d352ac68SChris Mason */ 443f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 444f188591eSChris Mason struct extent_buffer *eb, 4458436ea91SJosef Bacik u64 parent_transid) 446f188591eSChris Mason { 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 454a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 455f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 456f188591eSChris Mason while (1) { 4578436ea91SJosef Bacik ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE, 458f188591eSChris Mason btree_get_extent, mirror_num); 459256dd1bbSStefan Behrens if (!ret) { 460256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 461b9fab919SChris Mason parent_transid, 0)) 462ea466794SJosef Bacik break; 463256dd1bbSStefan Behrens else 464256dd1bbSStefan Behrens ret = -EIO; 465256dd1bbSStefan Behrens } 466d397712bSChris Mason 467a826d6dcSJosef Bacik /* 468a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 469a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 470a826d6dcSJosef Bacik * any less wrong. 471a826d6dcSJosef Bacik */ 472a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 473ea466794SJosef Bacik break; 474ea466794SJosef Bacik 4755d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 476f188591eSChris Mason eb->start, eb->len); 4774235298eSChris Mason if (num_copies == 1) 478ea466794SJosef Bacik break; 4794235298eSChris Mason 4805cf1ab56SJosef Bacik if (!failed_mirror) { 4815cf1ab56SJosef Bacik failed = 1; 4825cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4835cf1ab56SJosef Bacik } 4845cf1ab56SJosef Bacik 485f188591eSChris Mason mirror_num++; 486ea466794SJosef Bacik if (mirror_num == failed_mirror) 487ea466794SJosef Bacik mirror_num++; 488ea466794SJosef Bacik 4894235298eSChris Mason if (mirror_num > num_copies) 490ea466794SJosef Bacik break; 491f188591eSChris Mason } 492ea466794SJosef Bacik 493c0901581SStefan Behrens if (failed && !ret && failed_mirror) 494ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 495ea466794SJosef Bacik 496ea466794SJosef Bacik return ret; 497f188591eSChris Mason } 49819c00ddcSChris Mason 499d352ac68SChris Mason /* 500d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 501d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 502d352ac68SChris Mason */ 503d397712bSChris Mason 50401d58472SDaniel Dressler static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) 50519c00ddcSChris Mason { 5064eee4fa4SMiao Xie u64 start = page_offset(page); 50719c00ddcSChris Mason u64 found_start; 50819c00ddcSChris Mason struct extent_buffer *eb; 509f188591eSChris Mason 5104f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 5114f2de97aSJosef Bacik if (page != eb->pages[0]) 5124f2de97aSJosef Bacik return 0; 5130f805531SAlex Lyakas 51419c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 5150f805531SAlex Lyakas /* 5160f805531SAlex Lyakas * Please do not consolidate these warnings into a single if. 5170f805531SAlex Lyakas * It is useful to know what went wrong. 5180f805531SAlex Lyakas */ 5190f805531SAlex Lyakas if (WARN_ON(found_start != start)) 5200f805531SAlex Lyakas return -EUCLEAN; 5210f805531SAlex Lyakas if (WARN_ON(!PageUptodate(page))) 5220f805531SAlex Lyakas return -EUCLEAN; 5230f805531SAlex Lyakas 5240f805531SAlex Lyakas ASSERT(memcmp_extent_buffer(eb, fs_info->fsid, 5250f805531SAlex Lyakas btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); 5260f805531SAlex Lyakas 5278bd98f0eSAlex Lyakas return csum_tree_block(fs_info, eb, 0); 52819c00ddcSChris Mason } 52919c00ddcSChris Mason 53001d58472SDaniel Dressler static int check_tree_block_fsid(struct btrfs_fs_info *fs_info, 5312b82032cSYan Zheng struct extent_buffer *eb) 5322b82032cSYan Zheng { 53301d58472SDaniel Dressler struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; 5342b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 5352b82032cSYan Zheng int ret = 1; 5362b82032cSYan Zheng 5370a4e5586SRoss Kirk read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); 5382b82032cSYan Zheng while (fs_devices) { 5392b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 5402b82032cSYan Zheng ret = 0; 5412b82032cSYan Zheng break; 5422b82032cSYan Zheng } 5432b82032cSYan Zheng fs_devices = fs_devices->seed; 5442b82032cSYan Zheng } 5452b82032cSYan Zheng return ret; 5462b82032cSYan Zheng } 5472b82032cSYan Zheng 548a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 5496b722c17SLiu Bo btrfs_crit(root->fs_info, "corrupt %s, %s: block=%llu," \ 5506b722c17SLiu Bo " root=%llu, slot=%d", \ 5516b722c17SLiu Bo btrfs_header_level(eb) == 0 ? "leaf" : "node",\ 5526b722c17SLiu Bo reason, btrfs_header_bytenr(eb), root->objectid, slot) 553a826d6dcSJosef Bacik 554a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 555a826d6dcSJosef Bacik struct extent_buffer *leaf) 556a826d6dcSJosef Bacik { 557a826d6dcSJosef Bacik struct btrfs_key key; 558a826d6dcSJosef Bacik struct btrfs_key leaf_key; 559a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 560a826d6dcSJosef Bacik int slot; 561a826d6dcSJosef Bacik 5621ba98d08SLiu Bo if (nritems == 0) { 5631ba98d08SLiu Bo struct btrfs_root *check_root; 5641ba98d08SLiu Bo 5651ba98d08SLiu Bo key.objectid = btrfs_header_owner(leaf); 5661ba98d08SLiu Bo key.type = BTRFS_ROOT_ITEM_KEY; 5671ba98d08SLiu Bo key.offset = (u64)-1; 5681ba98d08SLiu Bo 5691ba98d08SLiu Bo check_root = btrfs_get_fs_root(root->fs_info, &key, false); 5701ba98d08SLiu Bo /* 5711ba98d08SLiu Bo * The only reason we also check NULL here is that during 5721ba98d08SLiu Bo * open_ctree() some roots has not yet been set up. 5731ba98d08SLiu Bo */ 5741ba98d08SLiu Bo if (!IS_ERR_OR_NULL(check_root)) { 5751ba98d08SLiu Bo /* if leaf is the root, then it's fine */ 5761ba98d08SLiu Bo if (leaf->start != 5771ba98d08SLiu Bo btrfs_root_bytenr(&check_root->root_item)) { 5781ba98d08SLiu Bo CORRUPT("non-root leaf's nritems is 0", 5791ba98d08SLiu Bo leaf, root, 0); 5801ba98d08SLiu Bo return -EIO; 5811ba98d08SLiu Bo } 5821ba98d08SLiu Bo } 583a826d6dcSJosef Bacik return 0; 5841ba98d08SLiu Bo } 585a826d6dcSJosef Bacik 586a826d6dcSJosef Bacik /* Check the 0 item */ 587a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 588a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 589a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 590a826d6dcSJosef Bacik return -EIO; 591a826d6dcSJosef Bacik } 592a826d6dcSJosef Bacik 593a826d6dcSJosef Bacik /* 594a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 595a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 596a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 597a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 598a826d6dcSJosef Bacik * offset is correct. 599a826d6dcSJosef Bacik */ 600a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 601a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 602a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 603a826d6dcSJosef Bacik 604a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 605a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 606a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 607a826d6dcSJosef Bacik return -EIO; 608a826d6dcSJosef Bacik } 609a826d6dcSJosef Bacik 610a826d6dcSJosef Bacik /* 611a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 612a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 613a826d6dcSJosef Bacik * front. 614a826d6dcSJosef Bacik */ 615a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 616a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 617a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 618a826d6dcSJosef Bacik return -EIO; 619a826d6dcSJosef Bacik } 620a826d6dcSJosef Bacik 621a826d6dcSJosef Bacik /* 622a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 623a826d6dcSJosef Bacik * just in case all the items are consistent to each other, but 624a826d6dcSJosef Bacik * all point outside of the leaf. 625a826d6dcSJosef Bacik */ 626a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 627a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 628a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 629a826d6dcSJosef Bacik return -EIO; 630a826d6dcSJosef Bacik } 631a826d6dcSJosef Bacik } 632a826d6dcSJosef Bacik 633a826d6dcSJosef Bacik return 0; 634a826d6dcSJosef Bacik } 635a826d6dcSJosef Bacik 636053ab70fSLiu Bo static int check_node(struct btrfs_root *root, struct extent_buffer *node) 637053ab70fSLiu Bo { 638053ab70fSLiu Bo unsigned long nr = btrfs_header_nritems(node); 6396b722c17SLiu Bo struct btrfs_key key, next_key; 6406b722c17SLiu Bo int slot; 6416b722c17SLiu Bo u64 bytenr; 6426b722c17SLiu Bo int ret = 0; 643053ab70fSLiu Bo 644053ab70fSLiu Bo if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) { 645053ab70fSLiu Bo btrfs_crit(root->fs_info, 646053ab70fSLiu Bo "corrupt node: block %llu root %llu nritems %lu", 647053ab70fSLiu Bo node->start, root->objectid, nr); 648053ab70fSLiu Bo return -EIO; 649053ab70fSLiu Bo } 6506b722c17SLiu Bo 6516b722c17SLiu Bo for (slot = 0; slot < nr - 1; slot++) { 6526b722c17SLiu Bo bytenr = btrfs_node_blockptr(node, slot); 6536b722c17SLiu Bo btrfs_node_key_to_cpu(node, &key, slot); 6546b722c17SLiu Bo btrfs_node_key_to_cpu(node, &next_key, slot + 1); 6556b722c17SLiu Bo 6566b722c17SLiu Bo if (!bytenr) { 6576b722c17SLiu Bo CORRUPT("invalid item slot", node, root, slot); 6586b722c17SLiu Bo ret = -EIO; 6596b722c17SLiu Bo goto out; 6606b722c17SLiu Bo } 6616b722c17SLiu Bo 6626b722c17SLiu Bo if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) { 6636b722c17SLiu Bo CORRUPT("bad key order", node, root, slot); 6646b722c17SLiu Bo ret = -EIO; 6656b722c17SLiu Bo goto out; 6666b722c17SLiu Bo } 6676b722c17SLiu Bo } 6686b722c17SLiu Bo out: 6696b722c17SLiu Bo return ret; 670053ab70fSLiu Bo } 671053ab70fSLiu Bo 672facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 673facc8a22SMiao Xie u64 phy_offset, struct page *page, 674facc8a22SMiao Xie u64 start, u64 end, int mirror) 675ce9adaa5SChris Mason { 676ce9adaa5SChris Mason u64 found_start; 677ce9adaa5SChris Mason int found_level; 678ce9adaa5SChris Mason struct extent_buffer *eb; 679ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 68002873e43SZhao Lei struct btrfs_fs_info *fs_info = root->fs_info; 681f188591eSChris Mason int ret = 0; 682727011e0SChris Mason int reads_done; 683ce9adaa5SChris Mason 684ce9adaa5SChris Mason if (!page->private) 685ce9adaa5SChris Mason goto out; 686d397712bSChris Mason 6874f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 688d397712bSChris Mason 6890b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 6900b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 6910b32f4bbSJosef Bacik */ 6920b32f4bbSJosef Bacik extent_buffer_get(eb); 6930b32f4bbSJosef Bacik 6940b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 695727011e0SChris Mason if (!reads_done) 696727011e0SChris Mason goto err; 697f188591eSChris Mason 6985cf1ab56SJosef Bacik eb->read_mirror = mirror; 699656f30dbSFilipe Manana if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { 700ea466794SJosef Bacik ret = -EIO; 701ea466794SJosef Bacik goto err; 702ea466794SJosef Bacik } 703ea466794SJosef Bacik 704ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 705727011e0SChris Mason if (found_start != eb->start) { 70602873e43SZhao Lei btrfs_err_rl(fs_info, "bad tree block start %llu %llu", 70794647322SDavid Sterba found_start, eb->start); 708f188591eSChris Mason ret = -EIO; 709ce9adaa5SChris Mason goto err; 710ce9adaa5SChris Mason } 71102873e43SZhao Lei if (check_tree_block_fsid(fs_info, eb)) { 71202873e43SZhao Lei btrfs_err_rl(fs_info, "bad fsid on block %llu", 71394647322SDavid Sterba eb->start); 7141259ab75SChris Mason ret = -EIO; 7151259ab75SChris Mason goto err; 7161259ab75SChris Mason } 717ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 7181c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 71902873e43SZhao Lei btrfs_err(fs_info, "bad tree block level %d", 7201c24c3ceSJosef Bacik (int)btrfs_header_level(eb)); 7211c24c3ceSJosef Bacik ret = -EIO; 7221c24c3ceSJosef Bacik goto err; 7231c24c3ceSJosef Bacik } 724ce9adaa5SChris Mason 72585d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 72685d4e461SChris Mason eb, found_level); 7274008c04aSChris Mason 72802873e43SZhao Lei ret = csum_tree_block(fs_info, eb, 1); 7298bd98f0eSAlex Lyakas if (ret) 730a826d6dcSJosef Bacik goto err; 731a826d6dcSJosef Bacik 732a826d6dcSJosef Bacik /* 733a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 734a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 735a826d6dcSJosef Bacik * return -EIO. 736a826d6dcSJosef Bacik */ 737a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 738a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 739a826d6dcSJosef Bacik ret = -EIO; 740a826d6dcSJosef Bacik } 741ce9adaa5SChris Mason 742053ab70fSLiu Bo if (found_level > 0 && check_node(root, eb)) 743053ab70fSLiu Bo ret = -EIO; 744053ab70fSLiu Bo 7450b32f4bbSJosef Bacik if (!ret) 7460b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 747ce9adaa5SChris Mason err: 74879fb65a1SJosef Bacik if (reads_done && 74979fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 75002873e43SZhao Lei btree_readahead_hook(fs_info, eb, eb->start, ret); 7514bb31e92SArne Jansen 75253b381b3SDavid Woodhouse if (ret) { 75353b381b3SDavid Woodhouse /* 75453b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 75553b381b3SDavid Woodhouse * again, we have to make sure it has something 75653b381b3SDavid Woodhouse * to decrement 75753b381b3SDavid Woodhouse */ 75853b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 7590b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 76053b381b3SDavid Woodhouse } 7610b32f4bbSJosef Bacik free_extent_buffer(eb); 762ce9adaa5SChris Mason out: 763f188591eSChris Mason return ret; 764ce9adaa5SChris Mason } 765ce9adaa5SChris Mason 766ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 7674bb31e92SArne Jansen { 7684bb31e92SArne Jansen struct extent_buffer *eb; 7694bb31e92SArne Jansen 7704f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 771656f30dbSFilipe Manana set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); 7725cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 77353b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 774ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 77502873e43SZhao Lei btree_readahead_hook(eb->fs_info, eb, eb->start, -EIO); 7764bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 7774bb31e92SArne Jansen } 7784bb31e92SArne Jansen 7794246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 780ce9adaa5SChris Mason { 78197eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 782ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 7839e0af237SLiu Bo struct btrfs_workqueue *wq; 7849e0af237SLiu Bo btrfs_work_func_t func; 785ce9adaa5SChris Mason 786ce9adaa5SChris Mason fs_info = end_io_wq->info; 7874246a0b6SChristoph Hellwig end_io_wq->error = bio->bi_error; 788d20f7043SChris Mason 78937226b21SMike Christie if (bio_op(bio) == REQ_OP_WRITE) { 7909e0af237SLiu Bo if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { 7919e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 7929e0af237SLiu Bo func = btrfs_endio_meta_write_helper; 7939e0af237SLiu Bo } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { 7949e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 7959e0af237SLiu Bo func = btrfs_freespace_write_helper; 7969e0af237SLiu Bo } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { 7979e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 7989e0af237SLiu Bo func = btrfs_endio_raid56_helper; 799d20f7043SChris Mason } else { 8009e0af237SLiu Bo wq = fs_info->endio_write_workers; 8019e0af237SLiu Bo func = btrfs_endio_write_helper; 802d20f7043SChris Mason } 8039e0af237SLiu Bo } else { 8048b110e39SMiao Xie if (unlikely(end_io_wq->metadata == 8058b110e39SMiao Xie BTRFS_WQ_ENDIO_DIO_REPAIR)) { 8068b110e39SMiao Xie wq = fs_info->endio_repair_workers; 8078b110e39SMiao Xie func = btrfs_endio_repair_helper; 8088b110e39SMiao Xie } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { 8099e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 8109e0af237SLiu Bo func = btrfs_endio_raid56_helper; 8119e0af237SLiu Bo } else if (end_io_wq->metadata) { 8129e0af237SLiu Bo wq = fs_info->endio_meta_workers; 8139e0af237SLiu Bo func = btrfs_endio_meta_helper; 8149e0af237SLiu Bo } else { 8159e0af237SLiu Bo wq = fs_info->endio_workers; 8169e0af237SLiu Bo func = btrfs_endio_helper; 8179e0af237SLiu Bo } 8189e0af237SLiu Bo } 8199e0af237SLiu Bo 8209e0af237SLiu Bo btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); 8219e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 822ce9adaa5SChris Mason } 823ce9adaa5SChris Mason 82422c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 825bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 8260b86a832SChris Mason { 82797eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 8288b110e39SMiao Xie 82997eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 830ce9adaa5SChris Mason if (!end_io_wq) 831ce9adaa5SChris Mason return -ENOMEM; 832ce9adaa5SChris Mason 833ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 834ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 83522c59948SChris Mason end_io_wq->info = info; 836ce9adaa5SChris Mason end_io_wq->error = 0; 837ce9adaa5SChris Mason end_io_wq->bio = bio; 83822c59948SChris Mason end_io_wq->metadata = metadata; 839ce9adaa5SChris Mason 840ce9adaa5SChris Mason bio->bi_private = end_io_wq; 841ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 84222c59948SChris Mason return 0; 84322c59948SChris Mason } 84422c59948SChris Mason 845b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 8464854ddd0SChris Mason { 8474854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 8485cdc7ad3SQu Wenruo info->thread_pool_size, 8494854ddd0SChris Mason info->fs_devices->open_devices); 8504854ddd0SChris Mason return 256 * limit; 8514854ddd0SChris Mason } 8524854ddd0SChris Mason 8534a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 8544a69a410SChris Mason { 8554a69a410SChris Mason struct async_submit_bio *async; 85679787eaaSJeff Mahoney int ret; 8574a69a410SChris Mason 8584a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 85981a75f67SMike Christie ret = async->submit_bio_start(async->inode, async->bio, 860eaf25d93SChris Mason async->mirror_num, async->bio_flags, 861eaf25d93SChris Mason async->bio_offset); 86279787eaaSJeff Mahoney if (ret) 86379787eaaSJeff Mahoney async->error = ret; 8644a69a410SChris Mason } 8654a69a410SChris Mason 8664a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 8678b712842SChris Mason { 8688b712842SChris Mason struct btrfs_fs_info *fs_info; 8698b712842SChris Mason struct async_submit_bio *async; 8704854ddd0SChris Mason int limit; 8718b712842SChris Mason 8728b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 8738b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 8744854ddd0SChris Mason 875b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 8764854ddd0SChris Mason limit = limit * 2 / 3; 8774854ddd0SChris Mason 878ee863954SDavid Sterba /* 879ee863954SDavid Sterba * atomic_dec_return implies a barrier for waitqueue_active 880ee863954SDavid Sterba */ 88166657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 882b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 8834854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 8844854ddd0SChris Mason 885bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 88679787eaaSJeff Mahoney if (async->error) { 8874246a0b6SChristoph Hellwig async->bio->bi_error = async->error; 8884246a0b6SChristoph Hellwig bio_endio(async->bio); 88979787eaaSJeff Mahoney return; 89079787eaaSJeff Mahoney } 89179787eaaSJeff Mahoney 89281a75f67SMike Christie async->submit_bio_done(async->inode, async->bio, async->mirror_num, 89381a75f67SMike Christie async->bio_flags, async->bio_offset); 8944a69a410SChris Mason } 8954a69a410SChris Mason 8964a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 8974a69a410SChris Mason { 8984a69a410SChris Mason struct async_submit_bio *async; 8994a69a410SChris Mason 9004a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 9018b712842SChris Mason kfree(async); 9028b712842SChris Mason } 9038b712842SChris Mason 90444b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 90581a75f67SMike Christie struct bio *bio, int mirror_num, 906c8b97818SChris Mason unsigned long bio_flags, 907eaf25d93SChris Mason u64 bio_offset, 9084a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 9094a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 91044b8bd7eSChris Mason { 91144b8bd7eSChris Mason struct async_submit_bio *async; 91244b8bd7eSChris Mason 91344b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 91444b8bd7eSChris Mason if (!async) 91544b8bd7eSChris Mason return -ENOMEM; 91644b8bd7eSChris Mason 91744b8bd7eSChris Mason async->inode = inode; 91844b8bd7eSChris Mason async->bio = bio; 91944b8bd7eSChris Mason async->mirror_num = mirror_num; 9204a69a410SChris Mason async->submit_bio_start = submit_bio_start; 9214a69a410SChris Mason async->submit_bio_done = submit_bio_done; 9224a69a410SChris Mason 9239e0af237SLiu Bo btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, 9245cdc7ad3SQu Wenruo run_one_async_done, run_one_async_free); 9254a69a410SChris Mason 926c8b97818SChris Mason async->bio_flags = bio_flags; 927eaf25d93SChris Mason async->bio_offset = bio_offset; 9288c8bee1dSChris Mason 92979787eaaSJeff Mahoney async->error = 0; 93079787eaaSJeff Mahoney 931cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 932d313d7a3SChris Mason 9331eff9d32SJens Axboe if (bio->bi_opf & REQ_SYNC) 9345cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 935d313d7a3SChris Mason 9365cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 9379473f16cSChris Mason 938771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 939771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 940771ed689SChris Mason wait_event(fs_info->async_submit_wait, 941771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 942771ed689SChris Mason } 943771ed689SChris Mason 94444b8bd7eSChris Mason return 0; 94544b8bd7eSChris Mason } 94644b8bd7eSChris Mason 947ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 948ce3ed71aSChris Mason { 9492c30c71bSKent Overstreet struct bio_vec *bvec; 950ce3ed71aSChris Mason struct btrfs_root *root; 9512c30c71bSKent Overstreet int i, ret = 0; 952ce3ed71aSChris Mason 9532c30c71bSKent Overstreet bio_for_each_segment_all(bvec, bio, i) { 954ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 95501d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 95679787eaaSJeff Mahoney if (ret) 95779787eaaSJeff Mahoney break; 958ce3ed71aSChris Mason } 9592c30c71bSKent Overstreet 96079787eaaSJeff Mahoney return ret; 961ce3ed71aSChris Mason } 962ce3ed71aSChris Mason 96381a75f67SMike Christie static int __btree_submit_bio_start(struct inode *inode, struct bio *bio, 96481a75f67SMike Christie int mirror_num, unsigned long bio_flags, 965eaf25d93SChris Mason u64 bio_offset) 96622c59948SChris Mason { 9678b712842SChris Mason /* 9688b712842SChris Mason * when we're called for a write, we're already in the async 9695443be45SChris Mason * submission context. Just jump into btrfs_map_bio 9708b712842SChris Mason */ 97179787eaaSJeff Mahoney return btree_csum_one_bio(bio); 97222c59948SChris Mason } 97322c59948SChris Mason 97481a75f67SMike Christie static int __btree_submit_bio_done(struct inode *inode, struct bio *bio, 975eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 976eaf25d93SChris Mason u64 bio_offset) 9774a69a410SChris Mason { 97861891923SStefan Behrens int ret; 97961891923SStefan Behrens 9808b712842SChris Mason /* 9814a69a410SChris Mason * when we're called for a write, we're already in the async 9824a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 9838b712842SChris Mason */ 98481a75f67SMike Christie ret = btrfs_map_bio(BTRFS_I(inode)->root, bio, mirror_num, 1); 9854246a0b6SChristoph Hellwig if (ret) { 9864246a0b6SChristoph Hellwig bio->bi_error = ret; 9874246a0b6SChristoph Hellwig bio_endio(bio); 9884246a0b6SChristoph Hellwig } 98961891923SStefan Behrens return ret; 9900b86a832SChris Mason } 9910b86a832SChris Mason 992de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 993de0022b9SJosef Bacik { 994de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 995de0022b9SJosef Bacik return 0; 996de0022b9SJosef Bacik #ifdef CONFIG_X86 997bc696ca0SBorislav Petkov if (static_cpu_has(X86_FEATURE_XMM4_2)) 998de0022b9SJosef Bacik return 0; 999de0022b9SJosef Bacik #endif 1000de0022b9SJosef Bacik return 1; 1001de0022b9SJosef Bacik } 1002de0022b9SJosef Bacik 100381a75f67SMike Christie static int btree_submit_bio_hook(struct inode *inode, struct bio *bio, 1004eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 1005eaf25d93SChris Mason u64 bio_offset) 100644b8bd7eSChris Mason { 1007de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 10084a69a410SChris Mason int ret; 1009cad321adSChris Mason 101037226b21SMike Christie if (bio_op(bio) != REQ_OP_WRITE) { 1011cad321adSChris Mason /* 1012cad321adSChris Mason * called for a read, do the setup so that checksum validation 1013cad321adSChris Mason * can happen in the async kernel threads 1014cad321adSChris Mason */ 1015f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 1016bfebd8b5SDavid Sterba bio, BTRFS_WQ_ENDIO_METADATA); 10171d4284bdSChris Mason if (ret) 101861891923SStefan Behrens goto out_w_error; 101981a75f67SMike Christie ret = btrfs_map_bio(BTRFS_I(inode)->root, bio, mirror_num, 0); 1020de0022b9SJosef Bacik } else if (!async) { 1021de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 1022de0022b9SJosef Bacik if (ret) 102361891923SStefan Behrens goto out_w_error; 102481a75f67SMike Christie ret = btrfs_map_bio(BTRFS_I(inode)->root, bio, mirror_num, 0); 102561891923SStefan Behrens } else { 1026cad321adSChris Mason /* 102761891923SStefan Behrens * kthread helpers are used to submit writes so that 102861891923SStefan Behrens * checksumming can happen in parallel across all CPUs 1029cad321adSChris Mason */ 103061891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 103181a75f67SMike Christie inode, bio, mirror_num, 0, 1032eaf25d93SChris Mason bio_offset, 10334a69a410SChris Mason __btree_submit_bio_start, 10344a69a410SChris Mason __btree_submit_bio_done); 103544b8bd7eSChris Mason } 103644b8bd7eSChris Mason 10374246a0b6SChristoph Hellwig if (ret) 10384246a0b6SChristoph Hellwig goto out_w_error; 10394246a0b6SChristoph Hellwig return 0; 10404246a0b6SChristoph Hellwig 104161891923SStefan Behrens out_w_error: 10424246a0b6SChristoph Hellwig bio->bi_error = ret; 10434246a0b6SChristoph Hellwig bio_endio(bio); 104461891923SStefan Behrens return ret; 104561891923SStefan Behrens } 104661891923SStefan Behrens 10473dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 1048784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 1049a6bc32b8SMel Gorman struct page *newpage, struct page *page, 1050a6bc32b8SMel Gorman enum migrate_mode mode) 1051784b4e29SChris Mason { 1052784b4e29SChris Mason /* 1053784b4e29SChris Mason * we can't safely write a btree page from here, 1054784b4e29SChris Mason * we haven't done the locking hook 1055784b4e29SChris Mason */ 1056784b4e29SChris Mason if (PageDirty(page)) 1057784b4e29SChris Mason return -EAGAIN; 1058784b4e29SChris Mason /* 1059784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 1060784b4e29SChris Mason * We must have no buffers or drop them. 1061784b4e29SChris Mason */ 1062784b4e29SChris Mason if (page_has_private(page) && 1063784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 1064784b4e29SChris Mason return -EAGAIN; 1065a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 1066784b4e29SChris Mason } 10673dd1462eSJan Beulich #endif 1068784b4e29SChris Mason 10690da5468fSChris Mason 10700da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 10710da5468fSChris Mason struct writeback_control *wbc) 10720da5468fSChris Mason { 1073e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 1074e2d84521SMiao Xie int ret; 1075e2d84521SMiao Xie 1076d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 1077448d640bSChris Mason 1078448d640bSChris Mason if (wbc->for_kupdate) 1079448d640bSChris Mason return 0; 1080448d640bSChris Mason 1081e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 1082b9473439SChris Mason /* this is a bit racy, but that's ok */ 1083e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 1084e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 1085e2d84521SMiao Xie if (ret < 0) 1086793955bcSChris Mason return 0; 1087793955bcSChris Mason } 10880b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 10890da5468fSChris Mason } 10900da5468fSChris Mason 1091b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 10925f39d397SChris Mason { 1093d1310b2eSChris Mason struct extent_io_tree *tree; 1094d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10958ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 10965f39d397SChris Mason } 10975f39d397SChris Mason 109870dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 10995f39d397SChris Mason { 110098509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 110198509cfcSChris Mason return 0; 11020c4e538bSDavid Sterba 1103f7a52a40SDavid Sterba return try_release_extent_buffer(page); 1104d98237b3SChris Mason } 1105d98237b3SChris Mason 1106d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 1107d47992f8SLukas Czerner unsigned int length) 1108d98237b3SChris Mason { 1109d1310b2eSChris Mason struct extent_io_tree *tree; 1110d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 11115f39d397SChris Mason extent_invalidatepage(tree, page, offset); 11125f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 11139ad6b7bcSChris Mason if (PagePrivate(page)) { 1114efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 1115efe120a0SFrank Holton "page private not zero on page %llu", 1116efe120a0SFrank Holton (unsigned long long)page_offset(page)); 11179ad6b7bcSChris Mason ClearPagePrivate(page); 11189ad6b7bcSChris Mason set_page_private(page, 0); 111909cbfeafSKirill A. Shutemov put_page(page); 11209ad6b7bcSChris Mason } 1121d98237b3SChris Mason } 1122d98237b3SChris Mason 11230b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 11240b32f4bbSJosef Bacik { 1125bb146eb2SJosef Bacik #ifdef DEBUG 11260b32f4bbSJosef Bacik struct extent_buffer *eb; 11270b32f4bbSJosef Bacik 11280b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 11290b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 11300b32f4bbSJosef Bacik BUG_ON(!eb); 11310b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 11320b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 11330b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1134bb146eb2SJosef Bacik #endif 11350b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 11360b32f4bbSJosef Bacik } 11370b32f4bbSJosef Bacik 11387f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1139d98237b3SChris Mason .readpage = btree_readpage, 11400da5468fSChris Mason .writepages = btree_writepages, 11415f39d397SChris Mason .releasepage = btree_releasepage, 11425f39d397SChris Mason .invalidatepage = btree_invalidatepage, 11435a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1144784b4e29SChris Mason .migratepage = btree_migratepage, 11455a92bc88SChris Mason #endif 11460b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1147d98237b3SChris Mason }; 1148123abc88SChris Mason 1149d3e46feaSDavid Sterba void readahead_tree_block(struct btrfs_root *root, u64 bytenr) 1150090d1875SChris Mason { 11515f39d397SChris Mason struct extent_buffer *buf = NULL; 11525f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1153090d1875SChris Mason 1154a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1155c871b0f2SLiu Bo if (IS_ERR(buf)) 11566197d86eSDavid Sterba return; 1157d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 11588436ea91SJosef Bacik buf, WAIT_NONE, btree_get_extent, 0); 11595f39d397SChris Mason free_extent_buffer(buf); 1160090d1875SChris Mason } 1161090d1875SChris Mason 1162c0dcaa4dSDavid Sterba int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, 1163ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1164ab0fff03SArne Jansen { 1165ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1166ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1167ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1168ab0fff03SArne Jansen int ret; 1169ab0fff03SArne Jansen 1170a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1171c871b0f2SLiu Bo if (IS_ERR(buf)) 1172ab0fff03SArne Jansen return 0; 1173ab0fff03SArne Jansen 1174ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1175ab0fff03SArne Jansen 11768436ea91SJosef Bacik ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK, 1177ab0fff03SArne Jansen btree_get_extent, mirror_num); 1178ab0fff03SArne Jansen if (ret) { 1179ab0fff03SArne Jansen free_extent_buffer(buf); 1180ab0fff03SArne Jansen return ret; 1181ab0fff03SArne Jansen } 1182ab0fff03SArne Jansen 1183ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1184ab0fff03SArne Jansen free_extent_buffer(buf); 1185ab0fff03SArne Jansen return -EIO; 11860b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1187ab0fff03SArne Jansen *eb = buf; 1188ab0fff03SArne Jansen } else { 1189ab0fff03SArne Jansen free_extent_buffer(buf); 1190ab0fff03SArne Jansen } 1191ab0fff03SArne Jansen return 0; 1192ab0fff03SArne Jansen } 1193ab0fff03SArne Jansen 119401d58472SDaniel Dressler struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, 11950308af44SDavid Sterba u64 bytenr) 11960999df54SChris Mason { 119701d58472SDaniel Dressler return find_extent_buffer(fs_info, bytenr); 11980999df54SChris Mason } 11990999df54SChris Mason 12000999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 1201a83fffb7SDavid Sterba u64 bytenr) 12020999df54SChris Mason { 1203f5ee5c9aSJeff Mahoney if (btrfs_is_testing(root->fs_info)) 1204b9ef22deSFeifei Xu return alloc_test_extent_buffer(root->fs_info, bytenr, 1205b9ef22deSFeifei Xu root->nodesize); 1206ce3e6984SDavid Sterba return alloc_extent_buffer(root->fs_info, bytenr); 12070999df54SChris Mason } 12080999df54SChris Mason 12090999df54SChris Mason 1210e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1211e02119d5SChris Mason { 1212727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 12138aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1214e02119d5SChris Mason } 1215e02119d5SChris Mason 1216e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1217e02119d5SChris Mason { 1218727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 12198aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1220e02119d5SChris Mason } 1221e02119d5SChris Mason 1222db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1223ce86cd59SDavid Sterba u64 parent_transid) 1224e20d96d6SChris Mason { 12255f39d397SChris Mason struct extent_buffer *buf = NULL; 122619c00ddcSChris Mason int ret; 122719c00ddcSChris Mason 1228a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1229c871b0f2SLiu Bo if (IS_ERR(buf)) 1230c871b0f2SLiu Bo return buf; 1231e4204dedSChris Mason 12328436ea91SJosef Bacik ret = btree_read_extent_buffer_pages(root, buf, parent_transid); 12330f0fe8f7SFilipe David Borba Manana if (ret) { 12340f0fe8f7SFilipe David Borba Manana free_extent_buffer(buf); 123564c043deSLiu Bo return ERR_PTR(ret); 12360f0fe8f7SFilipe David Borba Manana } 12375f39d397SChris Mason return buf; 1238ce9adaa5SChris Mason 1239eb60ceacSChris Mason } 1240eb60ceacSChris Mason 124101d58472SDaniel Dressler void clean_tree_block(struct btrfs_trans_handle *trans, 124201d58472SDaniel Dressler struct btrfs_fs_info *fs_info, 12435f39d397SChris Mason struct extent_buffer *buf) 1244ed2ff2cbSChris Mason { 124555c69072SChris Mason if (btrfs_header_generation(buf) == 1246e2d84521SMiao Xie fs_info->running_transaction->transid) { 1247b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1248b4ce94deSChris Mason 1249b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1250e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1251e2d84521SMiao Xie -buf->len, 1252e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1253b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1254b9473439SChris Mason btrfs_set_lock_blocking(buf); 12550b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1256925baeddSChris Mason } 12575f39d397SChris Mason } 1258ed7b63ebSJosef Bacik } 12595f39d397SChris Mason 12608257b2dcSMiao Xie static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) 12618257b2dcSMiao Xie { 12628257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 12638257b2dcSMiao Xie int ret; 12648257b2dcSMiao Xie 12658257b2dcSMiao Xie writers = kmalloc(sizeof(*writers), GFP_NOFS); 12668257b2dcSMiao Xie if (!writers) 12678257b2dcSMiao Xie return ERR_PTR(-ENOMEM); 12688257b2dcSMiao Xie 1269908c7f19STejun Heo ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); 12708257b2dcSMiao Xie if (ret < 0) { 12718257b2dcSMiao Xie kfree(writers); 12728257b2dcSMiao Xie return ERR_PTR(ret); 12738257b2dcSMiao Xie } 12748257b2dcSMiao Xie 12758257b2dcSMiao Xie init_waitqueue_head(&writers->wait); 12768257b2dcSMiao Xie return writers; 12778257b2dcSMiao Xie } 12788257b2dcSMiao Xie 12798257b2dcSMiao Xie static void 12808257b2dcSMiao Xie btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) 12818257b2dcSMiao Xie { 12828257b2dcSMiao Xie percpu_counter_destroy(&writers->counter); 12838257b2dcSMiao Xie kfree(writers); 12848257b2dcSMiao Xie } 12858257b2dcSMiao Xie 1286707e8a07SDavid Sterba static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize, 1287707e8a07SDavid Sterba struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1288e20d96d6SChris Mason u64 objectid) 1289d97e63b6SChris Mason { 12907c0260eeSJeff Mahoney bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 1291cfaa7295SChris Mason root->node = NULL; 1292a28ec197SChris Mason root->commit_root = NULL; 1293db94535dSChris Mason root->sectorsize = sectorsize; 1294db94535dSChris Mason root->nodesize = nodesize; 129587ee04ebSChris Mason root->stripesize = stripesize; 129627cdeb70SMiao Xie root->state = 0; 1297d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 12980b86a832SChris Mason 12990f7d52f4SChris Mason root->objectid = objectid; 13000f7d52f4SChris Mason root->last_trans = 0; 130113a8a7c8SYan, Zheng root->highest_objectid = 0; 1302eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1303199c2a9cSMiao Xie root->nr_ordered_extents = 0; 130458176a96SJosef Bacik root->name = NULL; 13056bef4d31SEric Paris root->inode_tree = RB_ROOT; 130616cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1307f0486c68SYan, Zheng root->block_rsv = NULL; 1308d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 13090b86a832SChris Mason 13100b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 13115d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1312eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1313eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1314199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1315199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 13162ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 13172ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1318d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 13195d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1320eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1321199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1322f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 13232ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 13242ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1325a2135011SChris Mason mutex_init(&root->objectid_mutex); 1326e02119d5SChris Mason mutex_init(&root->log_mutex); 132731f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1328573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 13297237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 13307237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 13317237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 13328b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 13338b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 13347237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 13357237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 13367237f183SYan Zheng atomic_set(&root->log_writers, 0); 13372ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 13388a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 1339b0feb9d9SMiao Xie atomic_set(&root->refs, 1); 13408257b2dcSMiao Xie atomic_set(&root->will_be_snapshoted, 0); 134155eeaf05SQu Wenruo atomic_set(&root->qgroup_meta_rsv, 0); 13427237f183SYan Zheng root->log_transid = 0; 1343d1433debSMiao Xie root->log_transid_committed = -1; 1344257c62e1SChris Mason root->last_log_commit = 0; 13457c0260eeSJeff Mahoney if (!dummy) 1346d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1347f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1348017e5369SChris Mason 13493768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 13503768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 13516702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 13527c0260eeSJeff Mahoney if (!dummy) 13533f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 135406ea65a3SJosef Bacik else 135506ea65a3SJosef Bacik root->defrag_trans_start = 0; 13564d775673SChris Mason root->root_key.objectid = objectid; 13570ee5dc67SAl Viro root->anon_dev = 0; 13588ea05e3aSAlexander Block 13595f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 13603768f368SChris Mason } 13613768f368SChris Mason 136274e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 136374e4d827SDavid Sterba gfp_t flags) 13646f07e42eSAl Viro { 136574e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 13666f07e42eSAl Viro if (root) 13676f07e42eSAl Viro root->fs_info = fs_info; 13686f07e42eSAl Viro return root; 13696f07e42eSAl Viro } 13706f07e42eSAl Viro 137106ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 137206ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 13737c0260eeSJeff Mahoney struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info, 13747c0260eeSJeff Mahoney u32 sectorsize, u32 nodesize) 137506ea65a3SJosef Bacik { 137606ea65a3SJosef Bacik struct btrfs_root *root; 137706ea65a3SJosef Bacik 13787c0260eeSJeff Mahoney if (!fs_info) 13797c0260eeSJeff Mahoney return ERR_PTR(-EINVAL); 13807c0260eeSJeff Mahoney 13817c0260eeSJeff Mahoney root = btrfs_alloc_root(fs_info, GFP_KERNEL); 138206ea65a3SJosef Bacik if (!root) 138306ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1384b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 13857c0260eeSJeff Mahoney __setup_root(nodesize, sectorsize, sectorsize, root, fs_info, 1386ef9f2db3SFeifei Xu BTRFS_ROOT_TREE_OBJECTID); 1387faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 138806ea65a3SJosef Bacik 138906ea65a3SJosef Bacik return root; 139006ea65a3SJosef Bacik } 139106ea65a3SJosef Bacik #endif 139206ea65a3SJosef Bacik 139320897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 139420897f5cSArne Jansen struct btrfs_fs_info *fs_info, 139520897f5cSArne Jansen u64 objectid) 139620897f5cSArne Jansen { 139720897f5cSArne Jansen struct extent_buffer *leaf; 139820897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 139920897f5cSArne Jansen struct btrfs_root *root; 140020897f5cSArne Jansen struct btrfs_key key; 140120897f5cSArne Jansen int ret = 0; 14026463fe58SStefan Behrens uuid_le uuid; 140320897f5cSArne Jansen 140474e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_KERNEL); 140520897f5cSArne Jansen if (!root) 140620897f5cSArne Jansen return ERR_PTR(-ENOMEM); 140720897f5cSArne Jansen 1408707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1409707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, objectid); 141020897f5cSArne Jansen root->root_key.objectid = objectid; 141120897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 141220897f5cSArne Jansen root->root_key.offset = 0; 141320897f5cSArne Jansen 14144d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 141520897f5cSArne Jansen if (IS_ERR(leaf)) { 141620897f5cSArne Jansen ret = PTR_ERR(leaf); 14171dd05682STsutomu Itoh leaf = NULL; 141820897f5cSArne Jansen goto fail; 141920897f5cSArne Jansen } 142020897f5cSArne Jansen 142120897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 142220897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 142320897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 142420897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 142520897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 142620897f5cSArne Jansen root->node = leaf; 142720897f5cSArne Jansen 14280a4e5586SRoss Kirk write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), 142920897f5cSArne Jansen BTRFS_FSID_SIZE); 143020897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 1431b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(leaf), 143220897f5cSArne Jansen BTRFS_UUID_SIZE); 143320897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 143420897f5cSArne Jansen 143520897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 143627cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 143720897f5cSArne Jansen 143820897f5cSArne Jansen root->root_item.flags = 0; 143920897f5cSArne Jansen root->root_item.byte_limit = 0; 144020897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 144120897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 144220897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 144320897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 144420897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 144520897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 144620897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 14476463fe58SStefan Behrens uuid_le_gen(&uuid); 14486463fe58SStefan Behrens memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); 144920897f5cSArne Jansen root->root_item.drop_level = 0; 145020897f5cSArne Jansen 145120897f5cSArne Jansen key.objectid = objectid; 145220897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 145320897f5cSArne Jansen key.offset = 0; 145420897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 145520897f5cSArne Jansen if (ret) 145620897f5cSArne Jansen goto fail; 145720897f5cSArne Jansen 145820897f5cSArne Jansen btrfs_tree_unlock(leaf); 145920897f5cSArne Jansen 146020897f5cSArne Jansen return root; 14611dd05682STsutomu Itoh 14621dd05682STsutomu Itoh fail: 14631dd05682STsutomu Itoh if (leaf) { 14641dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 146559885b39STsutomu Itoh free_extent_buffer(root->commit_root); 14661dd05682STsutomu Itoh free_extent_buffer(leaf); 14671dd05682STsutomu Itoh } 14681dd05682STsutomu Itoh kfree(root); 14691dd05682STsutomu Itoh 14701dd05682STsutomu Itoh return ERR_PTR(ret); 147120897f5cSArne Jansen } 147220897f5cSArne Jansen 14737237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1474e02119d5SChris Mason struct btrfs_fs_info *fs_info) 14750f7d52f4SChris Mason { 14760f7d52f4SChris Mason struct btrfs_root *root; 14770f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 14787237f183SYan Zheng struct extent_buffer *leaf; 1479e02119d5SChris Mason 148074e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1481e02119d5SChris Mason if (!root) 14827237f183SYan Zheng return ERR_PTR(-ENOMEM); 1483e02119d5SChris Mason 1484707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1485707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, 1486707e8a07SDavid Sterba BTRFS_TREE_LOG_OBJECTID); 1487e02119d5SChris Mason 1488e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1489e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1490e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 149127cdeb70SMiao Xie 14927237f183SYan Zheng /* 149327cdeb70SMiao Xie * DON'T set REF_COWS for log trees 149427cdeb70SMiao Xie * 14957237f183SYan Zheng * log trees do not get reference counted because they go away 14967237f183SYan Zheng * before a real commit is actually done. They do store pointers 14977237f183SYan Zheng * to file data extents, and those reference counts still get 14987237f183SYan Zheng * updated (along with back refs to the log tree). 14997237f183SYan Zheng */ 1500e02119d5SChris Mason 15014d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 15024d75f8a9SDavid Sterba NULL, 0, 0, 0); 15037237f183SYan Zheng if (IS_ERR(leaf)) { 15047237f183SYan Zheng kfree(root); 15057237f183SYan Zheng return ERR_CAST(leaf); 15067237f183SYan Zheng } 1507e02119d5SChris Mason 15085d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 15095d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 15105d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 15115d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 15125d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 15137237f183SYan Zheng root->node = leaf; 1514e02119d5SChris Mason 1515e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 15160a4e5586SRoss Kirk btrfs_header_fsid(), BTRFS_FSID_SIZE); 1517e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1518e02119d5SChris Mason btrfs_tree_unlock(root->node); 15197237f183SYan Zheng return root; 15207237f183SYan Zheng } 15217237f183SYan Zheng 15227237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 15237237f183SYan Zheng struct btrfs_fs_info *fs_info) 15247237f183SYan Zheng { 15257237f183SYan Zheng struct btrfs_root *log_root; 15267237f183SYan Zheng 15277237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 15287237f183SYan Zheng if (IS_ERR(log_root)) 15297237f183SYan Zheng return PTR_ERR(log_root); 15307237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 15317237f183SYan Zheng fs_info->log_root_tree = log_root; 15327237f183SYan Zheng return 0; 15337237f183SYan Zheng } 15347237f183SYan Zheng 15357237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 15367237f183SYan Zheng struct btrfs_root *root) 15377237f183SYan Zheng { 15387237f183SYan Zheng struct btrfs_root *log_root; 15397237f183SYan Zheng struct btrfs_inode_item *inode_item; 15407237f183SYan Zheng 15417237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 15427237f183SYan Zheng if (IS_ERR(log_root)) 15437237f183SYan Zheng return PTR_ERR(log_root); 15447237f183SYan Zheng 15457237f183SYan Zheng log_root->last_trans = trans->transid; 15467237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 15477237f183SYan Zheng 15487237f183SYan Zheng inode_item = &log_root->root_item.inode; 15493cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 15503cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 15513cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1552707e8a07SDavid Sterba btrfs_set_stack_inode_nbytes(inode_item, root->nodesize); 15533cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 15547237f183SYan Zheng 15555d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 15567237f183SYan Zheng 15577237f183SYan Zheng WARN_ON(root->log_root); 15587237f183SYan Zheng root->log_root = log_root; 15597237f183SYan Zheng root->log_transid = 0; 1560d1433debSMiao Xie root->log_transid_committed = -1; 1561257c62e1SChris Mason root->last_log_commit = 0; 1562e02119d5SChris Mason return 0; 1563e02119d5SChris Mason } 1564e02119d5SChris Mason 156535a3621bSStefan Behrens static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1566cb517eabSMiao Xie struct btrfs_key *key) 1567e02119d5SChris Mason { 1568e02119d5SChris Mason struct btrfs_root *root; 1569e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 15700f7d52f4SChris Mason struct btrfs_path *path; 157184234f3aSYan Zheng u64 generation; 1572cb517eabSMiao Xie int ret; 1573cb517eabSMiao Xie 1574cb517eabSMiao Xie path = btrfs_alloc_path(); 1575cb517eabSMiao Xie if (!path) 1576cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 15770f7d52f4SChris Mason 157874e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1579cb517eabSMiao Xie if (!root) { 1580cb517eabSMiao Xie ret = -ENOMEM; 1581cb517eabSMiao Xie goto alloc_fail; 15820f7d52f4SChris Mason } 15830f7d52f4SChris Mason 1584707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1585707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, key->objectid); 15860f7d52f4SChris Mason 1587cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1588cb517eabSMiao Xie &root->root_item, &root->root_key); 15890f7d52f4SChris Mason if (ret) { 159013a8a7c8SYan, Zheng if (ret > 0) 159113a8a7c8SYan, Zheng ret = -ENOENT; 1592cb517eabSMiao Xie goto find_fail; 15930f7d52f4SChris Mason } 159413a8a7c8SYan, Zheng 159584234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1596db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 1597ce86cd59SDavid Sterba generation); 159864c043deSLiu Bo if (IS_ERR(root->node)) { 159964c043deSLiu Bo ret = PTR_ERR(root->node); 1600cb517eabSMiao Xie goto find_fail; 1601cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1602cb517eabSMiao Xie ret = -EIO; 160364c043deSLiu Bo free_extent_buffer(root->node); 160464c043deSLiu Bo goto find_fail; 1605416bc658SJosef Bacik } 16065d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 160713a8a7c8SYan, Zheng out: 1608cb517eabSMiao Xie btrfs_free_path(path); 1609cb517eabSMiao Xie return root; 1610cb517eabSMiao Xie 1611cb517eabSMiao Xie find_fail: 1612cb517eabSMiao Xie kfree(root); 1613cb517eabSMiao Xie alloc_fail: 1614cb517eabSMiao Xie root = ERR_PTR(ret); 1615cb517eabSMiao Xie goto out; 1616cb517eabSMiao Xie } 1617cb517eabSMiao Xie 1618cb517eabSMiao Xie struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, 1619cb517eabSMiao Xie struct btrfs_key *location) 1620cb517eabSMiao Xie { 1621cb517eabSMiao Xie struct btrfs_root *root; 1622cb517eabSMiao Xie 1623cb517eabSMiao Xie root = btrfs_read_tree_root(tree_root, location); 1624cb517eabSMiao Xie if (IS_ERR(root)) 1625cb517eabSMiao Xie return root; 1626cb517eabSMiao Xie 1627cb517eabSMiao Xie if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { 162827cdeb70SMiao Xie set_bit(BTRFS_ROOT_REF_COWS, &root->state); 162908fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 163008fe4db1SLi Zefan } 163113a8a7c8SYan, Zheng 16325eda7b5eSChris Mason return root; 16335eda7b5eSChris Mason } 16345eda7b5eSChris Mason 1635cb517eabSMiao Xie int btrfs_init_fs_root(struct btrfs_root *root) 1636cb517eabSMiao Xie { 1637cb517eabSMiao Xie int ret; 16388257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 1639cb517eabSMiao Xie 1640cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1641cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1642cb517eabSMiao Xie GFP_NOFS); 1643cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1644cb517eabSMiao Xie ret = -ENOMEM; 1645cb517eabSMiao Xie goto fail; 1646cb517eabSMiao Xie } 1647cb517eabSMiao Xie 16488257b2dcSMiao Xie writers = btrfs_alloc_subvolume_writers(); 16498257b2dcSMiao Xie if (IS_ERR(writers)) { 16508257b2dcSMiao Xie ret = PTR_ERR(writers); 16518257b2dcSMiao Xie goto fail; 16528257b2dcSMiao Xie } 16538257b2dcSMiao Xie root->subv_writers = writers; 16548257b2dcSMiao Xie 1655cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 165657cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 165757cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1658cb517eabSMiao Xie 1659cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1660cb517eabSMiao Xie if (ret) 1661876d2cf1SLiu Bo goto fail; 1662f32e48e9SChandan Rajendra 1663f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1664f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1665f32e48e9SChandan Rajendra &root->highest_objectid); 1666f32e48e9SChandan Rajendra if (ret) { 1667f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1668876d2cf1SLiu Bo goto fail; 1669f32e48e9SChandan Rajendra } 1670f32e48e9SChandan Rajendra 1671f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1672f32e48e9SChandan Rajendra 1673f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1674f32e48e9SChandan Rajendra 1675cb517eabSMiao Xie return 0; 1676cb517eabSMiao Xie fail: 1677876d2cf1SLiu Bo /* the caller is responsible to call free_fs_root */ 1678cb517eabSMiao Xie return ret; 1679cb517eabSMiao Xie } 1680cb517eabSMiao Xie 168135bbb97fSJeff Mahoney struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1682cb517eabSMiao Xie u64 root_id) 1683cb517eabSMiao Xie { 1684cb517eabSMiao Xie struct btrfs_root *root; 1685cb517eabSMiao Xie 1686cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1687cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1688cb517eabSMiao Xie (unsigned long)root_id); 1689cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1690cb517eabSMiao Xie return root; 1691cb517eabSMiao Xie } 1692cb517eabSMiao Xie 1693cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1694cb517eabSMiao Xie struct btrfs_root *root) 1695cb517eabSMiao Xie { 1696cb517eabSMiao Xie int ret; 1697cb517eabSMiao Xie 1698e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1699cb517eabSMiao Xie if (ret) 1700cb517eabSMiao Xie return ret; 1701cb517eabSMiao Xie 1702cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1703cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1704cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1705cb517eabSMiao Xie root); 1706cb517eabSMiao Xie if (ret == 0) 170727cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1708cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1709cb517eabSMiao Xie radix_tree_preload_end(); 1710cb517eabSMiao Xie 1711cb517eabSMiao Xie return ret; 1712cb517eabSMiao Xie } 1713cb517eabSMiao Xie 1714c00869f1SMiao Xie struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 1715c00869f1SMiao Xie struct btrfs_key *location, 1716c00869f1SMiao Xie bool check_ref) 17175eda7b5eSChris Mason { 17185eda7b5eSChris Mason struct btrfs_root *root; 1719381cf658SDavid Sterba struct btrfs_path *path; 17201d4c08e0SDavid Sterba struct btrfs_key key; 17215eda7b5eSChris Mason int ret; 17225eda7b5eSChris Mason 1723edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1724edbd8d4eSChris Mason return fs_info->tree_root; 1725edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1726edbd8d4eSChris Mason return fs_info->extent_root; 17278f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 17288f18cf13SChris Mason return fs_info->chunk_root; 17298f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 17308f18cf13SChris Mason return fs_info->dev_root; 17310403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 17320403e47eSYan Zheng return fs_info->csum_root; 1733bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1734bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1735bcef60f2SArne Jansen ERR_PTR(-ENOENT); 1736f7a81ea4SStefan Behrens if (location->objectid == BTRFS_UUID_TREE_OBJECTID) 1737f7a81ea4SStefan Behrens return fs_info->uuid_root ? fs_info->uuid_root : 1738f7a81ea4SStefan Behrens ERR_PTR(-ENOENT); 173970f6d82eSOmar Sandoval if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 174070f6d82eSOmar Sandoval return fs_info->free_space_root ? fs_info->free_space_root : 174170f6d82eSOmar Sandoval ERR_PTR(-ENOENT); 17424df27c4dSYan, Zheng again: 1743cb517eabSMiao Xie root = btrfs_lookup_fs_root(fs_info, location->objectid); 174448475471SStefan Behrens if (root) { 1745c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) 174648475471SStefan Behrens return ERR_PTR(-ENOENT); 17475eda7b5eSChris Mason return root; 174848475471SStefan Behrens } 17495eda7b5eSChris Mason 1750cb517eabSMiao Xie root = btrfs_read_fs_root(fs_info->tree_root, location); 17515eda7b5eSChris Mason if (IS_ERR(root)) 17525eda7b5eSChris Mason return root; 17533394e160SChris Mason 1754c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1755d68fc57bSYan, Zheng ret = -ENOENT; 1756d68fc57bSYan, Zheng goto fail; 1757d68fc57bSYan, Zheng } 1758d68fc57bSYan, Zheng 1759cb517eabSMiao Xie ret = btrfs_init_fs_root(root); 1760cb517eabSMiao Xie if (ret) 1761cb517eabSMiao Xie goto fail; 1762cb517eabSMiao Xie 1763381cf658SDavid Sterba path = btrfs_alloc_path(); 1764381cf658SDavid Sterba if (!path) { 1765381cf658SDavid Sterba ret = -ENOMEM; 1766381cf658SDavid Sterba goto fail; 1767381cf658SDavid Sterba } 17681d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 17691d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 17701d4c08e0SDavid Sterba key.offset = location->objectid; 17711d4c08e0SDavid Sterba 17721d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1773381cf658SDavid Sterba btrfs_free_path(path); 1774d68fc57bSYan, Zheng if (ret < 0) 1775d68fc57bSYan, Zheng goto fail; 1776d68fc57bSYan, Zheng if (ret == 0) 177727cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1778d68fc57bSYan, Zheng 1779cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 17800f7d52f4SChris Mason if (ret) { 17814df27c4dSYan, Zheng if (ret == -EEXIST) { 17824df27c4dSYan, Zheng free_fs_root(root); 17834df27c4dSYan, Zheng goto again; 17840f7d52f4SChris Mason } 17854df27c4dSYan, Zheng goto fail; 17864df27c4dSYan, Zheng } 1787edbd8d4eSChris Mason return root; 17884df27c4dSYan, Zheng fail: 17894df27c4dSYan, Zheng free_fs_root(root); 17904df27c4dSYan, Zheng return ERR_PTR(ret); 1791edbd8d4eSChris Mason } 1792edbd8d4eSChris Mason 179304160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 179404160088SChris Mason { 179504160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 179604160088SChris Mason int ret = 0; 179704160088SChris Mason struct btrfs_device *device; 179804160088SChris Mason struct backing_dev_info *bdi; 1799b7967db7SChris Mason 18001f78160cSXiao Guangrong rcu_read_lock(); 18011f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1802dfe25020SChris Mason if (!device->bdev) 1803dfe25020SChris Mason continue; 180404160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 1805ff9ea323STejun Heo if (bdi_congested(bdi, bdi_bits)) { 180604160088SChris Mason ret = 1; 180704160088SChris Mason break; 180804160088SChris Mason } 180904160088SChris Mason } 18101f78160cSXiao Guangrong rcu_read_unlock(); 181104160088SChris Mason return ret; 181204160088SChris Mason } 181304160088SChris Mason 181404160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 181504160088SChris Mason { 1816ad081f14SJens Axboe int err; 1817ad081f14SJens Axboe 1818b4caecd4SChristoph Hellwig err = bdi_setup_and_register(bdi, "btrfs"); 1819ad081f14SJens Axboe if (err) 1820ad081f14SJens Axboe return err; 1821ad081f14SJens Axboe 182209cbfeafSKirill A. Shutemov bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; 182304160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 182404160088SChris Mason bdi->congested_data = info; 1825da2f0f74SChris Mason bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 182604160088SChris Mason return 0; 182704160088SChris Mason } 182804160088SChris Mason 18298b712842SChris Mason /* 18308b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 18318b712842SChris Mason * functions. This is where read checksum verification actually happens 18328b712842SChris Mason */ 18338b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1834ce9adaa5SChris Mason { 1835ce9adaa5SChris Mason struct bio *bio; 183697eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1837ce9adaa5SChris Mason 183897eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1839ce9adaa5SChris Mason bio = end_io_wq->bio; 18408b712842SChris Mason 18414246a0b6SChristoph Hellwig bio->bi_error = end_io_wq->error; 1842ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1843ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 184497eb6b69SDavid Sterba kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 18454246a0b6SChristoph Hellwig bio_endio(bio); 1846ce9adaa5SChris Mason } 184744b8bd7eSChris Mason 1848a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1849a74a4b97SChris Mason { 1850a74a4b97SChris Mason struct btrfs_root *root = arg; 1851d0278245SMiao Xie int again; 1852da288d28SFilipe Manana struct btrfs_trans_handle *trans; 1853a74a4b97SChris Mason 1854a74a4b97SChris Mason do { 1855d0278245SMiao Xie again = 0; 18569d1a2a3aSDavid Sterba 1857d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 1858babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) 1859d0278245SMiao Xie goto sleep; 1860d0278245SMiao Xie 186190c711abSZygo Blaxell /* 186290c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 186390c711abSZygo Blaxell * before we have finished mounting the filesystem. 186490c711abSZygo Blaxell */ 1865afcdd129SJosef Bacik if (!test_bit(BTRFS_FS_OPEN, &root->fs_info->flags)) 186690c711abSZygo Blaxell goto sleep; 186790c711abSZygo Blaxell 1868d0278245SMiao Xie if (!mutex_trylock(&root->fs_info->cleaner_mutex)) 1869d0278245SMiao Xie goto sleep; 1870d0278245SMiao Xie 1871dc7f370cSMiao Xie /* 1872dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1873dc7f370cSMiao Xie * during the above check and trylock. 1874dc7f370cSMiao Xie */ 1875babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) { 1876dc7f370cSMiao Xie mutex_unlock(&root->fs_info->cleaner_mutex); 1877dc7f370cSMiao Xie goto sleep; 1878dc7f370cSMiao Xie } 1879dc7f370cSMiao Xie 1880c2d6cb16SFilipe Manana mutex_lock(&root->fs_info->cleaner_delayed_iput_mutex); 188124bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1882c2d6cb16SFilipe Manana mutex_unlock(&root->fs_info->cleaner_delayed_iput_mutex); 1883c2d6cb16SFilipe Manana 18849d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 1885a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 1886a74a4b97SChris Mason 1887d0278245SMiao Xie /* 188805323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 188905323cd1SMiao Xie * needn't do anything special here. 1890d0278245SMiao Xie */ 1891d0278245SMiao Xie btrfs_run_defrag_inodes(root->fs_info); 189267c5e7d4SFilipe Manana 189367c5e7d4SFilipe Manana /* 189467c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 189567c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 189667c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 189767c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 189867c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 189967c5e7d4SFilipe Manana * unused block groups. 190067c5e7d4SFilipe Manana */ 190167c5e7d4SFilipe Manana btrfs_delete_unused_bgs(root->fs_info); 1902d0278245SMiao Xie sleep: 1903838fe188SJiri Kosina if (!again) { 1904a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 19058929ecfaSYan, Zheng if (!kthread_should_stop()) 1906a74a4b97SChris Mason schedule(); 1907a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1908a74a4b97SChris Mason } 1909a74a4b97SChris Mason } while (!kthread_should_stop()); 1910da288d28SFilipe Manana 1911da288d28SFilipe Manana /* 1912da288d28SFilipe Manana * Transaction kthread is stopped before us and wakes us up. 1913da288d28SFilipe Manana * However we might have started a new transaction and COWed some 1914da288d28SFilipe Manana * tree blocks when deleting unused block groups for example. So 1915da288d28SFilipe Manana * make sure we commit the transaction we started to have a clean 1916da288d28SFilipe Manana * shutdown when evicting the btree inode - if it has dirty pages 1917da288d28SFilipe Manana * when we do the final iput() on it, eviction will trigger a 1918da288d28SFilipe Manana * writeback for it which will fail with null pointer dereferences 1919da288d28SFilipe Manana * since work queues and other resources were already released and 1920da288d28SFilipe Manana * destroyed by the time the iput/eviction/writeback is made. 1921da288d28SFilipe Manana */ 1922da288d28SFilipe Manana trans = btrfs_attach_transaction(root); 1923da288d28SFilipe Manana if (IS_ERR(trans)) { 1924da288d28SFilipe Manana if (PTR_ERR(trans) != -ENOENT) 1925da288d28SFilipe Manana btrfs_err(root->fs_info, 1926da288d28SFilipe Manana "cleaner transaction attach returned %ld", 1927da288d28SFilipe Manana PTR_ERR(trans)); 1928da288d28SFilipe Manana } else { 1929da288d28SFilipe Manana int ret; 1930da288d28SFilipe Manana 1931da288d28SFilipe Manana ret = btrfs_commit_transaction(trans, root); 1932da288d28SFilipe Manana if (ret) 1933da288d28SFilipe Manana btrfs_err(root->fs_info, 1934da288d28SFilipe Manana "cleaner open transaction commit returned %d", 1935da288d28SFilipe Manana ret); 1936da288d28SFilipe Manana } 1937da288d28SFilipe Manana 1938a74a4b97SChris Mason return 0; 1939a74a4b97SChris Mason } 1940a74a4b97SChris Mason 1941a74a4b97SChris Mason static int transaction_kthread(void *arg) 1942a74a4b97SChris Mason { 1943a74a4b97SChris Mason struct btrfs_root *root = arg; 1944a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1945a74a4b97SChris Mason struct btrfs_transaction *cur; 19468929ecfaSYan, Zheng u64 transid; 1947a74a4b97SChris Mason unsigned long now; 1948a74a4b97SChris Mason unsigned long delay; 1949914b2007SJan Kara bool cannot_commit; 1950a74a4b97SChris Mason 1951a74a4b97SChris Mason do { 1952914b2007SJan Kara cannot_commit = false; 19538b87dc17SDavid Sterba delay = HZ * root->fs_info->commit_interval; 1954a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1955a74a4b97SChris Mason 1956a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1957a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1958a74a4b97SChris Mason if (!cur) { 1959a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1960a74a4b97SChris Mason goto sleep; 1961a74a4b97SChris Mason } 196231153d81SYan Zheng 1963a74a4b97SChris Mason now = get_seconds(); 19644a9d8bdeSMiao Xie if (cur->state < TRANS_STATE_BLOCKED && 19658b87dc17SDavid Sterba (now < cur->start_time || 19668b87dc17SDavid Sterba now - cur->start_time < root->fs_info->commit_interval)) { 1967a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1968a74a4b97SChris Mason delay = HZ * 5; 1969a74a4b97SChris Mason goto sleep; 1970a74a4b97SChris Mason } 19718929ecfaSYan, Zheng transid = cur->transid; 1972a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 197356bec294SChris Mason 197479787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1975354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1976914b2007SJan Kara if (IS_ERR(trans)) { 1977354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1978914b2007SJan Kara cannot_commit = true; 197979787eaaSJeff Mahoney goto sleep; 1980914b2007SJan Kara } 19818929ecfaSYan, Zheng if (transid == trans->transid) { 198279787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 19838929ecfaSYan, Zheng } else { 19848929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 19858929ecfaSYan, Zheng } 1986a74a4b97SChris Mason sleep: 1987a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1988a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1989a74a4b97SChris Mason 19904e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 19914e121c06SJosef Bacik &root->fs_info->fs_state))) 19924e121c06SJosef Bacik btrfs_cleanup_transaction(root); 1993a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 19948929ecfaSYan, Zheng if (!kthread_should_stop() && 1995914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1996914b2007SJan Kara cannot_commit)) 1997a74a4b97SChris Mason schedule_timeout(delay); 1998a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1999a74a4b97SChris Mason } while (!kthread_should_stop()); 2000a74a4b97SChris Mason return 0; 2001a74a4b97SChris Mason } 2002a74a4b97SChris Mason 2003af31f5e5SChris Mason /* 2004af31f5e5SChris Mason * this will find the highest generation in the array of 2005af31f5e5SChris Mason * root backups. The index of the highest array is returned, 2006af31f5e5SChris Mason * or -1 if we can't find anything. 2007af31f5e5SChris Mason * 2008af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 2009af31f5e5SChris Mason * generation of the latest root in the array with the generation 2010af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 2011af31f5e5SChris Mason */ 2012af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 2013af31f5e5SChris Mason { 2014af31f5e5SChris Mason u64 cur; 2015af31f5e5SChris Mason int newest_index = -1; 2016af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2017af31f5e5SChris Mason int i; 2018af31f5e5SChris Mason 2019af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 2020af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 2021af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 2022af31f5e5SChris Mason if (cur == newest_gen) 2023af31f5e5SChris Mason newest_index = i; 2024af31f5e5SChris Mason } 2025af31f5e5SChris Mason 2026af31f5e5SChris Mason /* check to see if we actually wrapped around */ 2027af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 2028af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 2029af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 2030af31f5e5SChris Mason if (cur == newest_gen) 2031af31f5e5SChris Mason newest_index = 0; 2032af31f5e5SChris Mason } 2033af31f5e5SChris Mason return newest_index; 2034af31f5e5SChris Mason } 2035af31f5e5SChris Mason 2036af31f5e5SChris Mason 2037af31f5e5SChris Mason /* 2038af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 2039af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 2040af31f5e5SChris Mason * field in the fs_info struct 2041af31f5e5SChris Mason */ 2042af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 2043af31f5e5SChris Mason u64 newest_gen) 2044af31f5e5SChris Mason { 2045af31f5e5SChris Mason int newest_index = -1; 2046af31f5e5SChris Mason 2047af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 2048af31f5e5SChris Mason /* if there was garbage in there, just move along */ 2049af31f5e5SChris Mason if (newest_index == -1) { 2050af31f5e5SChris Mason info->backup_root_index = 0; 2051af31f5e5SChris Mason } else { 2052af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 2053af31f5e5SChris Mason } 2054af31f5e5SChris Mason } 2055af31f5e5SChris Mason 2056af31f5e5SChris Mason /* 2057af31f5e5SChris Mason * copy all the root pointers into the super backup array. 2058af31f5e5SChris Mason * this will bump the backup pointer by one when it is 2059af31f5e5SChris Mason * done 2060af31f5e5SChris Mason */ 2061af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 2062af31f5e5SChris Mason { 2063af31f5e5SChris Mason int next_backup; 2064af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2065af31f5e5SChris Mason int last_backup; 2066af31f5e5SChris Mason 2067af31f5e5SChris Mason next_backup = info->backup_root_index; 2068af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 2069af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 2070af31f5e5SChris Mason 2071af31f5e5SChris Mason /* 2072af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 2073af31f5e5SChris Mason * this happens only at umount 2074af31f5e5SChris Mason */ 2075af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 2076af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 2077af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 2078af31f5e5SChris Mason next_backup = last_backup; 2079af31f5e5SChris Mason 2080af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 2081af31f5e5SChris Mason 2082af31f5e5SChris Mason /* 2083af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 2084af31f5e5SChris Mason * regardless of which ones we use today 2085af31f5e5SChris Mason */ 2086af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 2087af31f5e5SChris Mason 2088af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 2089af31f5e5SChris Mason 2090af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 2091af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 2092af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 2093af31f5e5SChris Mason 2094af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 2095af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 2096af31f5e5SChris Mason 2097af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 2098af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 2099af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 2100af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 2101af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 2102af31f5e5SChris Mason 2103af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 2104af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 2105af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 2106af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 2107af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 2108af31f5e5SChris Mason 21097c7e82a7SChris Mason /* 21107c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 21117c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 21127c7e82a7SChris Mason */ 21137c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 21147c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 21157c7e82a7SChris Mason info->fs_root->node->start); 2116af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 2117af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 2118af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 2119af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 21207c7e82a7SChris Mason } 2121af31f5e5SChris Mason 2122af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 2123af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 2124af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 2125af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 2126af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 2127af31f5e5SChris Mason 2128af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 2129af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 2130af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 2131af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 2132af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 2133af31f5e5SChris Mason 2134af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 2135af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 2136af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 2137af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 2138af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 2139af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 2140af31f5e5SChris Mason 2141af31f5e5SChris Mason /* 2142af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 2143af31f5e5SChris Mason * for the next commit 2144af31f5e5SChris Mason */ 2145af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 2146af31f5e5SChris Mason &info->super_for_commit->super_roots, 2147af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 2148af31f5e5SChris Mason } 2149af31f5e5SChris Mason 2150af31f5e5SChris Mason /* 2151af31f5e5SChris Mason * this copies info out of the root backup array and back into 2152af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 2153af31f5e5SChris Mason * the array, so you send it the number of backups you've already 2154af31f5e5SChris Mason * tried and the last backup index you used. 2155af31f5e5SChris Mason * 2156af31f5e5SChris Mason * this returns -1 when it has tried all the backups 2157af31f5e5SChris Mason */ 2158af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 2159af31f5e5SChris Mason struct btrfs_super_block *super, 2160af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 2161af31f5e5SChris Mason { 2162af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2163af31f5e5SChris Mason int newest = *backup_index; 2164af31f5e5SChris Mason 2165af31f5e5SChris Mason if (*num_backups_tried == 0) { 2166af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 2167af31f5e5SChris Mason 2168af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 2169af31f5e5SChris Mason if (newest == -1) 2170af31f5e5SChris Mason return -1; 2171af31f5e5SChris Mason 2172af31f5e5SChris Mason *backup_index = newest; 2173af31f5e5SChris Mason *num_backups_tried = 1; 2174af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 2175af31f5e5SChris Mason /* we've tried all the backups, all done */ 2176af31f5e5SChris Mason return -1; 2177af31f5e5SChris Mason } else { 2178af31f5e5SChris Mason /* jump to the next oldest backup */ 2179af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 2180af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 2181af31f5e5SChris Mason *backup_index = newest; 2182af31f5e5SChris Mason *num_backups_tried += 1; 2183af31f5e5SChris Mason } 2184af31f5e5SChris Mason root_backup = super->super_roots + newest; 2185af31f5e5SChris Mason 2186af31f5e5SChris Mason btrfs_set_super_generation(super, 2187af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 2188af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 2189af31f5e5SChris Mason btrfs_set_super_root_level(super, 2190af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 2191af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 2192af31f5e5SChris Mason 2193af31f5e5SChris Mason /* 2194af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 2195af31f5e5SChris Mason * need a fsck 2196af31f5e5SChris Mason */ 2197af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 2198af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 2199af31f5e5SChris Mason return 0; 2200af31f5e5SChris Mason } 2201af31f5e5SChris Mason 22027abadb64SLiu Bo /* helper to cleanup workers */ 22037abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 22047abadb64SLiu Bo { 2205dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 2206afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 22075cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 2208fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 2209fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_meta_workers); 2210fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 22118b110e39SMiao Xie btrfs_destroy_workqueue(fs_info->endio_repair_workers); 2212d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 2213fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 2214fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 2215fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 2216a8c93d4eSQu Wenruo btrfs_destroy_workqueue(fs_info->submit_workers); 22175b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 2218e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 2219736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 2220a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 2221fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 2222a79b7d4bSChris Mason btrfs_destroy_workqueue(fs_info->extent_workers); 22237abadb64SLiu Bo } 22247abadb64SLiu Bo 22252e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 22262e9f5954SRashika { 22272e9f5954SRashika if (root) { 22282e9f5954SRashika free_extent_buffer(root->node); 22292e9f5954SRashika free_extent_buffer(root->commit_root); 22302e9f5954SRashika root->node = NULL; 22312e9f5954SRashika root->commit_root = NULL; 22322e9f5954SRashika } 22332e9f5954SRashika } 22342e9f5954SRashika 2235af31f5e5SChris Mason /* helper to cleanup tree roots */ 2236af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 2237af31f5e5SChris Mason { 22382e9f5954SRashika free_root_extent_buffers(info->tree_root); 2239655b09feSJosef Bacik 22402e9f5954SRashika free_root_extent_buffers(info->dev_root); 22412e9f5954SRashika free_root_extent_buffers(info->extent_root); 22422e9f5954SRashika free_root_extent_buffers(info->csum_root); 22432e9f5954SRashika free_root_extent_buffers(info->quota_root); 22442e9f5954SRashika free_root_extent_buffers(info->uuid_root); 22452e9f5954SRashika if (chunk_root) 22462e9f5954SRashika free_root_extent_buffers(info->chunk_root); 224770f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 2248af31f5e5SChris Mason } 2249af31f5e5SChris Mason 2250faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 2251171f6537SJosef Bacik { 2252171f6537SJosef Bacik int ret; 2253171f6537SJosef Bacik struct btrfs_root *gang[8]; 2254171f6537SJosef Bacik int i; 2255171f6537SJosef Bacik 2256171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2257171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2258171f6537SJosef Bacik struct btrfs_root, root_list); 2259171f6537SJosef Bacik list_del(&gang[0]->root_list); 2260171f6537SJosef Bacik 226127cdeb70SMiao Xie if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { 2262cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 2263171f6537SJosef Bacik } else { 2264171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2265171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2266b0feb9d9SMiao Xie btrfs_put_fs_root(gang[0]); 2267171f6537SJosef Bacik } 2268171f6537SJosef Bacik } 2269171f6537SJosef Bacik 2270171f6537SJosef Bacik while (1) { 2271171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2272171f6537SJosef Bacik (void **)gang, 0, 2273171f6537SJosef Bacik ARRAY_SIZE(gang)); 2274171f6537SJosef Bacik if (!ret) 2275171f6537SJosef Bacik break; 2276171f6537SJosef Bacik for (i = 0; i < ret; i++) 2277cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2278171f6537SJosef Bacik } 22791a4319ccSLiu Bo 22801a4319ccSLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 22811a4319ccSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 22821a4319ccSLiu Bo btrfs_destroy_pinned_extent(fs_info->tree_root, 22831a4319ccSLiu Bo fs_info->pinned_extents); 22841a4319ccSLiu Bo } 2285171f6537SJosef Bacik } 2286af31f5e5SChris Mason 2287638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2288638aa7edSEric Sandeen { 2289638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2290638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2291638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2292638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2293638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2294638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2295638aa7edSEric Sandeen fs_info->scrub_workers_refcnt = 0; 2296638aa7edSEric Sandeen } 2297638aa7edSEric Sandeen 2298779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2299779a65a4SEric Sandeen { 2300779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2301779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2302779a65a4SEric Sandeen atomic_set(&fs_info->balance_running, 0); 2303779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2304779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2305779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2306779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2307779a65a4SEric Sandeen } 2308779a65a4SEric Sandeen 2309f37938e0SEric Sandeen static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info, 2310f37938e0SEric Sandeen struct btrfs_root *tree_root) 2311f37938e0SEric Sandeen { 2312f37938e0SEric Sandeen fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2313f37938e0SEric Sandeen set_nlink(fs_info->btree_inode, 1); 2314f37938e0SEric Sandeen /* 2315f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2316f37938e0SEric Sandeen * the real end of the address space is determined by all of 2317f37938e0SEric Sandeen * the devices in the system 2318f37938e0SEric Sandeen */ 2319f37938e0SEric Sandeen fs_info->btree_inode->i_size = OFFSET_MAX; 2320f37938e0SEric Sandeen fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 2321f37938e0SEric Sandeen 2322f37938e0SEric Sandeen RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2323f37938e0SEric Sandeen extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2324f37938e0SEric Sandeen fs_info->btree_inode->i_mapping); 2325f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2326f37938e0SEric Sandeen extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 2327f37938e0SEric Sandeen 2328f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2329f37938e0SEric Sandeen 2330f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->root = tree_root; 2331f37938e0SEric Sandeen memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 2332f37938e0SEric Sandeen sizeof(struct btrfs_key)); 2333f37938e0SEric Sandeen set_bit(BTRFS_INODE_DUMMY, 2334f37938e0SEric Sandeen &BTRFS_I(fs_info->btree_inode)->runtime_flags); 2335f37938e0SEric Sandeen btrfs_insert_inode_hash(fs_info->btree_inode); 2336f37938e0SEric Sandeen } 2337f37938e0SEric Sandeen 2338ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2339ad618368SEric Sandeen { 2340ad618368SEric Sandeen fs_info->dev_replace.lock_owner = 0; 2341ad618368SEric Sandeen atomic_set(&fs_info->dev_replace.nesting_level, 0); 2342ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 234373beece9SLiu Bo rwlock_init(&fs_info->dev_replace.lock); 234473beece9SLiu Bo atomic_set(&fs_info->dev_replace.read_locks, 0); 234573beece9SLiu Bo atomic_set(&fs_info->dev_replace.blocking_readers, 0); 2346ad618368SEric Sandeen init_waitqueue_head(&fs_info->replace_wait); 234773beece9SLiu Bo init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); 2348ad618368SEric Sandeen } 2349ad618368SEric Sandeen 2350f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2351f9e92e40SEric Sandeen { 2352f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2353f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2354f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2355f9e92e40SEric Sandeen fs_info->qgroup_op_tree = RB_ROOT; 2356f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2357f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2358f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2359d2c609b8SJeff Mahoney fs_info->qgroup_rescan_running = false; 2360f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2361f9e92e40SEric Sandeen } 2362f9e92e40SEric Sandeen 23632a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 23642a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 23652a458198SEric Sandeen { 23662a458198SEric Sandeen int max_active = fs_info->thread_pool_size; 23676f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 23682a458198SEric Sandeen 23692a458198SEric Sandeen fs_info->workers = 2370cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2371cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 23722a458198SEric Sandeen 23732a458198SEric Sandeen fs_info->delalloc_workers = 2374cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2375cb001095SJeff Mahoney flags, max_active, 2); 23762a458198SEric Sandeen 23772a458198SEric Sandeen fs_info->flush_workers = 2378cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2379cb001095SJeff Mahoney flags, max_active, 0); 23802a458198SEric Sandeen 23812a458198SEric Sandeen fs_info->caching_workers = 2382cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 23832a458198SEric Sandeen 23842a458198SEric Sandeen /* 23852a458198SEric Sandeen * a higher idle thresh on the submit workers makes it much more 23862a458198SEric Sandeen * likely that bios will be send down in a sane order to the 23872a458198SEric Sandeen * devices 23882a458198SEric Sandeen */ 23892a458198SEric Sandeen fs_info->submit_workers = 2390cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "submit", flags, 23912a458198SEric Sandeen min_t(u64, fs_devices->num_devices, 23922a458198SEric Sandeen max_active), 64); 23932a458198SEric Sandeen 23942a458198SEric Sandeen fs_info->fixup_workers = 2395cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 23962a458198SEric Sandeen 23972a458198SEric Sandeen /* 23982a458198SEric Sandeen * endios are largely parallel and should have a very 23992a458198SEric Sandeen * low idle thresh 24002a458198SEric Sandeen */ 24012a458198SEric Sandeen fs_info->endio_workers = 2402cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 24032a458198SEric Sandeen fs_info->endio_meta_workers = 2404cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2405cb001095SJeff Mahoney max_active, 4); 24062a458198SEric Sandeen fs_info->endio_meta_write_workers = 2407cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2408cb001095SJeff Mahoney max_active, 2); 24092a458198SEric Sandeen fs_info->endio_raid56_workers = 2410cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2411cb001095SJeff Mahoney max_active, 4); 24122a458198SEric Sandeen fs_info->endio_repair_workers = 2413cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); 24142a458198SEric Sandeen fs_info->rmw_workers = 2415cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 24162a458198SEric Sandeen fs_info->endio_write_workers = 2417cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2418cb001095SJeff Mahoney max_active, 2); 24192a458198SEric Sandeen fs_info->endio_freespace_worker = 2420cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2421cb001095SJeff Mahoney max_active, 0); 24222a458198SEric Sandeen fs_info->delayed_workers = 2423cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2424cb001095SJeff Mahoney max_active, 0); 24252a458198SEric Sandeen fs_info->readahead_workers = 2426cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2427cb001095SJeff Mahoney max_active, 2); 24282a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2429cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 24302a458198SEric Sandeen fs_info->extent_workers = 2431cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "extent-refs", flags, 24322a458198SEric Sandeen min_t(u64, fs_devices->num_devices, 24332a458198SEric Sandeen max_active), 8); 24342a458198SEric Sandeen 24352a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 24362a458198SEric Sandeen fs_info->submit_workers && fs_info->flush_workers && 24372a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 24382a458198SEric Sandeen fs_info->endio_meta_write_workers && 24392a458198SEric Sandeen fs_info->endio_repair_workers && 24402a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 24412a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 24422a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 24432a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 24442a458198SEric Sandeen fs_info->extent_workers && 24452a458198SEric Sandeen fs_info->qgroup_rescan_workers)) { 24462a458198SEric Sandeen return -ENOMEM; 24472a458198SEric Sandeen } 24482a458198SEric Sandeen 24492a458198SEric Sandeen return 0; 24502a458198SEric Sandeen } 24512a458198SEric Sandeen 245263443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 245363443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 245463443bf5SEric Sandeen { 245563443bf5SEric Sandeen int ret; 245663443bf5SEric Sandeen struct btrfs_root *tree_root = fs_info->tree_root; 245763443bf5SEric Sandeen struct btrfs_root *log_tree_root; 245863443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 245963443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 246063443bf5SEric Sandeen 246163443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2462f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 246363443bf5SEric Sandeen return -EIO; 246463443bf5SEric Sandeen } 246563443bf5SEric Sandeen 246674e4d827SDavid Sterba log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 246763443bf5SEric Sandeen if (!log_tree_root) 246863443bf5SEric Sandeen return -ENOMEM; 246963443bf5SEric Sandeen 247063443bf5SEric Sandeen __setup_root(tree_root->nodesize, tree_root->sectorsize, 247163443bf5SEric Sandeen tree_root->stripesize, log_tree_root, fs_info, 247263443bf5SEric Sandeen BTRFS_TREE_LOG_OBJECTID); 247363443bf5SEric Sandeen 247463443bf5SEric Sandeen log_tree_root->node = read_tree_block(tree_root, bytenr, 247563443bf5SEric Sandeen fs_info->generation + 1); 247664c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2477f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 24780eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 247964c043deSLiu Bo kfree(log_tree_root); 24800eeff236SLiu Bo return ret; 248164c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2482f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 248363443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 248463443bf5SEric Sandeen kfree(log_tree_root); 248563443bf5SEric Sandeen return -EIO; 248663443bf5SEric Sandeen } 248763443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 248863443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 248963443bf5SEric Sandeen if (ret) { 249034d97007SAnand Jain btrfs_handle_fs_error(tree_root->fs_info, ret, 249163443bf5SEric Sandeen "Failed to recover log tree"); 249263443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 249363443bf5SEric Sandeen kfree(log_tree_root); 249463443bf5SEric Sandeen return ret; 249563443bf5SEric Sandeen } 249663443bf5SEric Sandeen 249763443bf5SEric Sandeen if (fs_info->sb->s_flags & MS_RDONLY) { 249863443bf5SEric Sandeen ret = btrfs_commit_super(tree_root); 249963443bf5SEric Sandeen if (ret) 250063443bf5SEric Sandeen return ret; 250163443bf5SEric Sandeen } 250263443bf5SEric Sandeen 250363443bf5SEric Sandeen return 0; 250463443bf5SEric Sandeen } 250563443bf5SEric Sandeen 25064bbcaa64SEric Sandeen static int btrfs_read_roots(struct btrfs_fs_info *fs_info, 25074bbcaa64SEric Sandeen struct btrfs_root *tree_root) 25084bbcaa64SEric Sandeen { 2509a4f3d2c4SDavid Sterba struct btrfs_root *root; 25104bbcaa64SEric Sandeen struct btrfs_key location; 25114bbcaa64SEric Sandeen int ret; 25124bbcaa64SEric Sandeen 25134bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 25144bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 25154bbcaa64SEric Sandeen location.offset = 0; 25164bbcaa64SEric Sandeen 2517a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2518a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2519a4f3d2c4SDavid Sterba return PTR_ERR(root); 2520a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2521a4f3d2c4SDavid Sterba fs_info->extent_root = root; 25224bbcaa64SEric Sandeen 25234bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2524a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2525a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2526a4f3d2c4SDavid Sterba return PTR_ERR(root); 2527a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2528a4f3d2c4SDavid Sterba fs_info->dev_root = root; 25294bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 25304bbcaa64SEric Sandeen 25314bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2532a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2533a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2534a4f3d2c4SDavid Sterba return PTR_ERR(root); 2535a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2536a4f3d2c4SDavid Sterba fs_info->csum_root = root; 25374bbcaa64SEric Sandeen 25384bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2539a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2540a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2541a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2542afcdd129SJosef Bacik set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); 2543a4f3d2c4SDavid Sterba fs_info->quota_root = root; 25444bbcaa64SEric Sandeen } 25454bbcaa64SEric Sandeen 25464bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2547a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2548a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2549a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 25504bbcaa64SEric Sandeen if (ret != -ENOENT) 25514bbcaa64SEric Sandeen return ret; 25524bbcaa64SEric Sandeen } else { 2553a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2554a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 25554bbcaa64SEric Sandeen } 25564bbcaa64SEric Sandeen 255770f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 255870f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 255970f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 256070f6d82eSOmar Sandoval if (IS_ERR(root)) 256170f6d82eSOmar Sandoval return PTR_ERR(root); 256270f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 256370f6d82eSOmar Sandoval fs_info->free_space_root = root; 256470f6d82eSOmar Sandoval } 256570f6d82eSOmar Sandoval 25664bbcaa64SEric Sandeen return 0; 25674bbcaa64SEric Sandeen } 25684bbcaa64SEric Sandeen 2569ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 2570dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2571dfe25020SChris Mason char *options) 2572eb60ceacSChris Mason { 2573db94535dSChris Mason u32 sectorsize; 2574db94535dSChris Mason u32 nodesize; 257587ee04ebSChris Mason u32 stripesize; 257684234f3aSYan Zheng u64 generation; 2577f2b636e8SJosef Bacik u64 features; 25783de4586cSChris Mason struct btrfs_key location; 2579a061fc8dSChris Mason struct buffer_head *bh; 25804d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2581815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2582f84a8bd6SAl Viro struct btrfs_root *tree_root; 25834d34b278SIlya Dryomov struct btrfs_root *chunk_root; 2584eb60ceacSChris Mason int ret; 2585e58ca020SYan int err = -EINVAL; 2586af31f5e5SChris Mason int num_backups_tried = 0; 2587af31f5e5SChris Mason int backup_index = 0; 25885cdc7ad3SQu Wenruo int max_active; 25894543df7eSChris Mason 259074e4d827SDavid Sterba tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 259174e4d827SDavid Sterba chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 2592cb517eabSMiao Xie if (!tree_root || !chunk_root) { 259339279cc3SChris Mason err = -ENOMEM; 259439279cc3SChris Mason goto fail; 259539279cc3SChris Mason } 259676dda93cSYan, Zheng 259776dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 259876dda93cSYan, Zheng if (ret) { 259976dda93cSYan, Zheng err = ret; 260076dda93cSYan, Zheng goto fail; 260176dda93cSYan, Zheng } 260276dda93cSYan, Zheng 260376dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 260476dda93cSYan, Zheng if (ret) { 260576dda93cSYan, Zheng err = ret; 260676dda93cSYan, Zheng goto fail_srcu; 260776dda93cSYan, Zheng } 260876dda93cSYan, Zheng 2609908c7f19STejun Heo ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 2610e2d84521SMiao Xie if (ret) { 2611e2d84521SMiao Xie err = ret; 2612e2d84521SMiao Xie goto fail_bdi; 2613e2d84521SMiao Xie } 261409cbfeafSKirill A. Shutemov fs_info->dirty_metadata_batch = PAGE_SIZE * 2615e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2616e2d84521SMiao Xie 2617908c7f19STejun Heo ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2618963d678bSMiao Xie if (ret) { 2619963d678bSMiao Xie err = ret; 2620963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2621963d678bSMiao Xie } 2622963d678bSMiao Xie 2623908c7f19STejun Heo ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); 2624c404e0dcSMiao Xie if (ret) { 2625c404e0dcSMiao Xie err = ret; 2626c404e0dcSMiao Xie goto fail_delalloc_bytes; 2627c404e0dcSMiao Xie } 2628c404e0dcSMiao Xie 262976dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 263076dda93cSYan, Zheng if (!fs_info->btree_inode) { 263176dda93cSYan, Zheng err = -ENOMEM; 2632c404e0dcSMiao Xie goto fail_bio_counter; 263376dda93cSYan, Zheng } 263476dda93cSYan, Zheng 2635a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 26361561dedaSMiao Xie 263776dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2638f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 26398fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2640facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 264124bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2642eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 264311833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2644eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2645a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 264676dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 264724bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 26484cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 26492bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2650f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2651ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2652fcebe456SJosef Bacik spin_lock_init(&fs_info->qgroup_op_lock); 2653f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 265447ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2655f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2656d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 265767c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 26587585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2659573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2660c2d6cb16SFilipe Manana mutex_init(&fs_info->cleaner_delayed_iput_mutex); 2661de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 266219c00ddcSChris Mason 26630b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 26646324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2665f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 266647ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 26670b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 266866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 266966d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 267066d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 267166d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 267266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 267366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 267466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 267566d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 267666d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2677cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2678771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 26798c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 26800986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 26814cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2682fcebe456SJosef Bacik atomic_set(&fs_info->qgroup_op_seq, 0); 26832fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2684fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 26859e7cc91aSWang Xiaoguang fs_info->fs_frozen = 0; 2686e20d96d6SChris Mason fs_info->sb = sb; 268795ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 26889ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 26894cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 26902bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2691f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 26928b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2693f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 269490519d66SArne Jansen /* readahead state */ 2695d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 269690519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2697c8b97818SChris Mason 2698b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2699b34b086cSChris Mason num_online_cpus() + 2, 8); 27000afbaf8cSChris Mason 2701199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2702199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 270316cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 270474e4d827SDavid Sterba GFP_KERNEL); 270516cdcec7SMiao Xie if (!fs_info->delayed_root) { 270616cdcec7SMiao Xie err = -ENOMEM; 270716cdcec7SMiao Xie goto fail_iput; 270816cdcec7SMiao Xie } 270916cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 27103eaa2885SChris Mason 2711638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 271221adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 271321adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 271421adbd5cSStefan Behrens #endif 2715779a65a4SEric Sandeen btrfs_init_balance(fs_info); 271621c7e756SMiao Xie btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); 2717a2de733cSArne Jansen 2718a061fc8dSChris Mason sb->s_blocksize = 4096; 2719a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 272032a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 2721a061fc8dSChris Mason 2722f37938e0SEric Sandeen btrfs_init_btree_inode(fs_info, tree_root); 272339279cc3SChris Mason 2724e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 27256bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2726a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2727925baeddSChris Mason 272811833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2729f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 273011833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2731f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 273211833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2733afcdd129SJosef Bacik set_bit(BTRFS_FS_BARRIER, &fs_info->flags); 2734509659cdSChris Mason 27355a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 273679154b1bSChris Mason mutex_init(&fs_info->tree_log_mutex); 2737925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2738a74a4b97SChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2739a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 27407d9eb12cSChris Mason mutex_init(&fs_info->volume_mutex); 27411bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 27429e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2743c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 274476dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2745803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2746fa9c0d79SChris Mason 2747ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2748f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2749416ac51dSArne Jansen 2750fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2751fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2752fa9c0d79SChris Mason 2753e6dcd2dcSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 2754f9295749SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2755bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 27564854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 27573768f368SChris Mason 275804216820SFilipe Manana INIT_LIST_HEAD(&fs_info->pinned_chunks); 275904216820SFilipe Manana 276053b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 276153b381b3SDavid Woodhouse if (ret) { 276283c8266aSDavid Sterba err = ret; 276353b381b3SDavid Woodhouse goto fail_alloc; 276453b381b3SDavid Woodhouse } 276553b381b3SDavid Woodhouse 2766707e8a07SDavid Sterba __setup_root(4096, 4096, 4096, tree_root, 27672c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 27687eccb903SChris Mason 27693c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 27701104a885SDavid Sterba 27711104a885SDavid Sterba /* 27721104a885SDavid Sterba * Read super block and check the signature bytes only 27731104a885SDavid Sterba */ 2774a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 277592fc03fbSAnand Jain if (IS_ERR(bh)) { 277692fc03fbSAnand Jain err = PTR_ERR(bh); 277716cdcec7SMiao Xie goto fail_alloc; 277820b45077SDave Young } 277939279cc3SChris Mason 27801104a885SDavid Sterba /* 27811104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 27821104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 27831104a885SDavid Sterba */ 2784ab8d0fc4SJeff Mahoney if (btrfs_check_super_csum(fs_info, bh->b_data)) { 278505135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 27861104a885SDavid Sterba err = -EINVAL; 2787b2acdddfSAnand Jain brelse(bh); 27881104a885SDavid Sterba goto fail_alloc; 27891104a885SDavid Sterba } 27901104a885SDavid Sterba 27911104a885SDavid Sterba /* 27921104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 27931104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 27941104a885SDavid Sterba * the whole block of INFO_SIZE 27951104a885SDavid Sterba */ 27966c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 27976c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 27986c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2799a061fc8dSChris Mason brelse(bh); 28005f39d397SChris Mason 28016c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 28020b86a832SChris Mason 28031104a885SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 28041104a885SDavid Sterba if (ret) { 280505135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 28061104a885SDavid Sterba err = -EINVAL; 28071104a885SDavid Sterba goto fail_alloc; 28081104a885SDavid Sterba } 28091104a885SDavid Sterba 28106c41761fSDavid Sterba disk_super = fs_info->super_copy; 28110f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 281216cdcec7SMiao Xie goto fail_alloc; 28130f7d52f4SChris Mason 2814acce952bSliubo /* check FS state, whether FS is broken. */ 281587533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 281687533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2817acce952bSliubo 281875e7cb7fSLiu Bo /* 2819af31f5e5SChris Mason * run through our array of backup supers and setup 2820af31f5e5SChris Mason * our ring pointer to the oldest one 2821af31f5e5SChris Mason */ 2822af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2823af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2824af31f5e5SChris Mason 2825af31f5e5SChris Mason /* 282675e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 282775e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 282875e7cb7fSLiu Bo */ 282975e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 283075e7cb7fSLiu Bo 283196da0919SQu Wenruo ret = btrfs_parse_options(tree_root, options, sb->s_flags); 28322b82032cSYan Zheng if (ret) { 28332b82032cSYan Zheng err = ret; 283416cdcec7SMiao Xie goto fail_alloc; 28352b82032cSYan Zheng } 2836dfe25020SChris Mason 2837f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2838f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2839f2b636e8SJosef Bacik if (features) { 284005135f59SDavid Sterba btrfs_err(fs_info, 284105135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 2842c1c9ff7cSGeert Uytterhoeven features); 2843f2b636e8SJosef Bacik err = -EINVAL; 284416cdcec7SMiao Xie goto fail_alloc; 2845f2b636e8SJosef Bacik } 2846f2b636e8SJosef Bacik 28475d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 28485d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 284969e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2850a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2851727011e0SChris Mason 28523173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 285305135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 28543173a18fSJosef Bacik 2855727011e0SChris Mason /* 2856727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2857727011e0SChris Mason * they are bigger than the page size 2858727011e0SChris Mason */ 285909cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 2860727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 286105135f59SDavid Sterba btrfs_info(fs_info, 286205135f59SDavid Sterba "flagging fs with big metadata feature"); 2863727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2864727011e0SChris Mason } 2865727011e0SChris Mason 2866bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2867bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2868b7f67055SChandan Rajendra stripesize = sectorsize; 2869707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 2870963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2871bc3f116fSChris Mason 2872bc3f116fSChris Mason /* 2873bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2874bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2875bc3f116fSChris Mason */ 2876bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2877707e8a07SDavid Sterba (sectorsize != nodesize)) { 287805135f59SDavid Sterba btrfs_err(fs_info, 287905135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 288005135f59SDavid Sterba nodesize, sectorsize); 2881bc3f116fSChris Mason goto fail_alloc; 2882bc3f116fSChris Mason } 2883bc3f116fSChris Mason 2884ceda0864SMiao Xie /* 2885ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2886ceda0864SMiao Xie * update the flag. 2887ceda0864SMiao Xie */ 28885d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 28895d4f98a2SYan Zheng 2890f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2891f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2892f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 289305135f59SDavid Sterba btrfs_err(fs_info, 289405135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 2895c1c9ff7cSGeert Uytterhoeven features); 2896f2b636e8SJosef Bacik err = -EINVAL; 289716cdcec7SMiao Xie goto fail_alloc; 2898f2b636e8SJosef Bacik } 289961d92c32SChris Mason 29005cdc7ad3SQu Wenruo max_active = fs_info->thread_pool_size; 290161d92c32SChris Mason 29022a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 29032a458198SEric Sandeen if (ret) { 29042a458198SEric Sandeen err = ret; 29050dc3b84aSJosef Bacik goto fail_sb_buffer; 29060dc3b84aSJosef Bacik } 29074543df7eSChris Mason 29084575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2909c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 291009cbfeafSKirill A. Shutemov SZ_4M / PAGE_SIZE); 29114575c9ccSChris Mason 2912db94535dSChris Mason tree_root->nodesize = nodesize; 2913db94535dSChris Mason tree_root->sectorsize = sectorsize; 291487ee04ebSChris Mason tree_root->stripesize = stripesize; 2915a061fc8dSChris Mason 2916a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2917a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2918db94535dSChris Mason 2919925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2920e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2921925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 292284eed90fSChris Mason if (ret) { 292305135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 29245d4f98a2SYan Zheng goto fail_sb_buffer; 292584eed90fSChris Mason } 29260b86a832SChris Mason 292784234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 29280b86a832SChris Mason 2929707e8a07SDavid Sterba __setup_root(nodesize, sectorsize, stripesize, chunk_root, 2930707e8a07SDavid Sterba fs_info, BTRFS_CHUNK_TREE_OBJECTID); 29310b86a832SChris Mason 29320b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 29330b86a832SChris Mason btrfs_super_chunk_root(disk_super), 2934ce86cd59SDavid Sterba generation); 293564c043deSLiu Bo if (IS_ERR(chunk_root->node) || 293664c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 293705135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 2938e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 2939e5fffbacSchandan free_extent_buffer(chunk_root->node); 294095ab1f64SZhao Lei chunk_root->node = NULL; 2941af31f5e5SChris Mason goto fail_tree_roots; 294283121942SDavid Woodhouse } 29435d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 29445d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 29450b86a832SChris Mason 2946e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2947b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); 2948e17cade2SChris Mason 29490b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 29502b82032cSYan Zheng if (ret) { 295105135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 2952af31f5e5SChris Mason goto fail_tree_roots; 29532b82032cSYan Zheng } 29540b86a832SChris Mason 29558dabb742SStefan Behrens /* 29568dabb742SStefan Behrens * keep the device that is marked to be the target device for the 29578dabb742SStefan Behrens * dev_replace procedure 29588dabb742SStefan Behrens */ 29599eaed21eSEric Sandeen btrfs_close_extra_devices(fs_devices, 0); 2960dfe25020SChris Mason 2961a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 296205135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 2963a6b0d5c8SChris Mason goto fail_tree_roots; 2964a6b0d5c8SChris Mason } 2965a6b0d5c8SChris Mason 2966af31f5e5SChris Mason retry_root_backup: 296784234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 29680b86a832SChris Mason 2969e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2970db94535dSChris Mason btrfs_super_root(disk_super), 2971ce86cd59SDavid Sterba generation); 297264c043deSLiu Bo if (IS_ERR(tree_root->node) || 297364c043deSLiu Bo !extent_buffer_uptodate(tree_root->node)) { 297405135f59SDavid Sterba btrfs_warn(fs_info, "failed to read tree root"); 2975e5fffbacSchandan if (!IS_ERR(tree_root->node)) 2976e5fffbacSchandan free_extent_buffer(tree_root->node); 297795ab1f64SZhao Lei tree_root->node = NULL; 2978af31f5e5SChris Mason goto recovery_tree_root; 297983121942SDavid Woodhouse } 2980af31f5e5SChris Mason 29815d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 29825d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 298369e9c6c6SStefan Behrens btrfs_set_root_refs(&tree_root->root_item, 1); 2984db94535dSChris Mason 2985f32e48e9SChandan Rajendra mutex_lock(&tree_root->objectid_mutex); 2986f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(tree_root, 2987f32e48e9SChandan Rajendra &tree_root->highest_objectid); 2988f32e48e9SChandan Rajendra if (ret) { 2989f32e48e9SChandan Rajendra mutex_unlock(&tree_root->objectid_mutex); 2990f32e48e9SChandan Rajendra goto recovery_tree_root; 2991f32e48e9SChandan Rajendra } 2992f32e48e9SChandan Rajendra 2993f32e48e9SChandan Rajendra ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2994f32e48e9SChandan Rajendra 2995f32e48e9SChandan Rajendra mutex_unlock(&tree_root->objectid_mutex); 2996f32e48e9SChandan Rajendra 29974bbcaa64SEric Sandeen ret = btrfs_read_roots(fs_info, tree_root); 29984bbcaa64SEric Sandeen if (ret) 2999af31f5e5SChris Mason goto recovery_tree_root; 3000f7a81ea4SStefan Behrens 30018929ecfaSYan, Zheng fs_info->generation = generation; 30028929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 30038929ecfaSYan, Zheng 300468310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 300568310a5eSIlya Dryomov if (ret) { 300605135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 300768310a5eSIlya Dryomov goto fail_block_groups; 300868310a5eSIlya Dryomov } 300968310a5eSIlya Dryomov 3010733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 3011733f4fbbSStefan Behrens if (ret) { 301205135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 3013733f4fbbSStefan Behrens goto fail_block_groups; 3014733f4fbbSStefan Behrens } 3015733f4fbbSStefan Behrens 30168dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 30178dabb742SStefan Behrens if (ret) { 301805135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 30198dabb742SStefan Behrens goto fail_block_groups; 30208dabb742SStefan Behrens } 30218dabb742SStefan Behrens 30229eaed21eSEric Sandeen btrfs_close_extra_devices(fs_devices, 1); 30238dabb742SStefan Behrens 3024b7c35e81SAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices, NULL); 3025b7c35e81SAnand Jain if (ret) { 302605135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 302705135f59SDavid Sterba ret); 3028b7c35e81SAnand Jain goto fail_block_groups; 3029b7c35e81SAnand Jain } 3030b7c35e81SAnand Jain 3031b7c35e81SAnand Jain ret = btrfs_sysfs_add_device(fs_devices); 3032b7c35e81SAnand Jain if (ret) { 303305135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs device interface: %d", 303405135f59SDavid Sterba ret); 3035b7c35e81SAnand Jain goto fail_fsdev_sysfs; 3036b7c35e81SAnand Jain } 3037b7c35e81SAnand Jain 303896f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 30395ac1d209SJeff Mahoney if (ret) { 304005135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 3041b7c35e81SAnand Jain goto fail_fsdev_sysfs; 30425ac1d209SJeff Mahoney } 30435ac1d209SJeff Mahoney 3044c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 3045c59021f8Sliubo if (ret) { 304605135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 30472365dd3cSAnand Jain goto fail_sysfs; 3048c59021f8Sliubo } 3049c59021f8Sliubo 30504bbcaa64SEric Sandeen ret = btrfs_read_block_groups(fs_info->extent_root); 30511b1d1f66SJosef Bacik if (ret) { 305205135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 30532365dd3cSAnand Jain goto fail_sysfs; 30541b1d1f66SJosef Bacik } 30555af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 30565af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 3057292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 3058292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 3059292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 306005135f59SDavid Sterba btrfs_warn(fs_info, 306105135f59SDavid Sterba "missing devices (%llu) exceeds the limit (%d), writeable mount is not allowed", 306278fa1770SZhao Lei fs_info->fs_devices->missing_devices, 306378fa1770SZhao Lei fs_info->num_tolerated_disk_barrier_failures); 30642365dd3cSAnand Jain goto fail_sysfs; 3065292fd7fcSStefan Behrens } 30669078a3e1SChris Mason 3067a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3068a74a4b97SChris Mason "btrfs-cleaner"); 306957506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 30702365dd3cSAnand Jain goto fail_sysfs; 3071a74a4b97SChris Mason 3072a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3073a74a4b97SChris Mason tree_root, 3074a74a4b97SChris Mason "btrfs-transaction"); 307557506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 30763f157a2fSChris Mason goto fail_cleaner; 3077a74a4b97SChris Mason 30783cdde224SJeff Mahoney if (!btrfs_test_opt(tree_root->fs_info, SSD) && 30793cdde224SJeff Mahoney !btrfs_test_opt(tree_root->fs_info, NOSSD) && 3080c289811cSChris Mason !fs_info->fs_devices->rotating) { 308105135f59SDavid Sterba btrfs_info(fs_info, "detected SSD devices, enabling SSD mode"); 3082c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 3083c289811cSChris Mason } 3084c289811cSChris Mason 3085572d9ab7SDavid Sterba /* 308601327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3087572d9ab7SDavid Sterba * not have to wait for transaction commit 3088572d9ab7SDavid Sterba */ 3089572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 30903818aea2SQu Wenruo 309121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 30923cdde224SJeff Mahoney if (btrfs_test_opt(tree_root->fs_info, CHECK_INTEGRITY)) { 309321adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 30943cdde224SJeff Mahoney btrfs_test_opt(tree_root->fs_info, 309521adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 309621adbd5cSStefan Behrens 1 : 0, 309721adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 309821adbd5cSStefan Behrens if (ret) 309905135f59SDavid Sterba btrfs_warn(fs_info, 310005135f59SDavid Sterba "failed to initialize integrity check module: %d", 310105135f59SDavid Sterba ret); 310221adbd5cSStefan Behrens } 310321adbd5cSStefan Behrens #endif 3104bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3105bcef60f2SArne Jansen if (ret) 3106bcef60f2SArne Jansen goto fail_trans_kthread; 310721adbd5cSStefan Behrens 310896da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 310996da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 31103cdde224SJeff Mahoney !btrfs_test_opt(tree_root->fs_info, NOLOGREPLAY)) { 311163443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 311279787eaaSJeff Mahoney if (ret) { 311363443bf5SEric Sandeen err = ret; 311428c16cbbSWang Shilong goto fail_qgroup; 3115e556ce2cSYan Zheng } 3116e02119d5SChris Mason } 31171a40e23bSZheng Yan 311876dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 311979787eaaSJeff Mahoney if (ret) 312028c16cbbSWang Shilong goto fail_qgroup; 312176dda93cSYan, Zheng 31227c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 3123d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 312444c44af2SIlya Dryomov if (ret) 312528c16cbbSWang Shilong goto fail_qgroup; 312690c711abSZygo Blaxell 312790c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 31285d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 312990c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3130d7ce5843SMiao Xie if (ret < 0) { 313105135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 313205135f59SDavid Sterba ret); 3133d7ce5843SMiao Xie err = -EINVAL; 3134bcef60f2SArne Jansen goto fail_qgroup; 3135d7ce5843SMiao Xie } 31367c2ca468SChris Mason } 31371a40e23bSZheng Yan 31383de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 31393de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 3140cb517eabSMiao Xie location.offset = 0; 31413de4586cSChris Mason 31423de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 31433140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 31443140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3145bcef60f2SArne Jansen goto fail_qgroup; 31463140c9a3SDan Carpenter } 3147c289811cSChris Mason 31482b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 31492b6ba629SIlya Dryomov return 0; 31502b6ba629SIlya Dryomov 31513cdde224SJeff Mahoney if (btrfs_test_opt(tree_root->fs_info, FREE_SPACE_TREE) && 3152511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 315305135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3154511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3155511711afSChris Mason if (ret) { 315605135f59SDavid Sterba btrfs_warn(fs_info, 315705135f59SDavid Sterba "failed to create free space tree: %d", ret); 3158511711afSChris Mason close_ctree(tree_root); 3159511711afSChris Mason return ret; 3160511711afSChris Mason } 3161511711afSChris Mason } 3162511711afSChris Mason 3163e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 31642b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 31652b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 31662b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 31672b6ba629SIlya Dryomov close_ctree(tree_root); 31682b6ba629SIlya Dryomov return ret; 31692b6ba629SIlya Dryomov } 3170e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 317159641015SIlya Dryomov 31722b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 31732b6ba629SIlya Dryomov if (ret) { 317405135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 317566b4ffd1SJosef Bacik close_ctree(tree_root); 31762b6ba629SIlya Dryomov return ret; 3177e3acc2a6SJosef Bacik } 3178e3acc2a6SJosef Bacik 31798dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 31808dabb742SStefan Behrens if (ret) { 318105135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 31828dabb742SStefan Behrens close_ctree(tree_root); 31838dabb742SStefan Behrens return ret; 31848dabb742SStefan Behrens } 31858dabb742SStefan Behrens 3186b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3187b382a324SJan Schmidt 31883cdde224SJeff Mahoney if (btrfs_test_opt(tree_root->fs_info, CLEAR_CACHE) && 318970f6d82eSOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 319005135f59SDavid Sterba btrfs_info(fs_info, "clearing free space tree"); 319170f6d82eSOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 319270f6d82eSOmar Sandoval if (ret) { 319305135f59SDavid Sterba btrfs_warn(fs_info, 319405135f59SDavid Sterba "failed to clear free space tree: %d", ret); 319570f6d82eSOmar Sandoval close_ctree(tree_root); 319670f6d82eSOmar Sandoval return ret; 319770f6d82eSOmar Sandoval } 319870f6d82eSOmar Sandoval } 319970f6d82eSOmar Sandoval 32004bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 320105135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3202f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3203f7a81ea4SStefan Behrens if (ret) { 320405135f59SDavid Sterba btrfs_warn(fs_info, 320505135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 3206f7a81ea4SStefan Behrens close_ctree(tree_root); 3207f7a81ea4SStefan Behrens return ret; 3208f7a81ea4SStefan Behrens } 32093cdde224SJeff Mahoney } else if (btrfs_test_opt(tree_root->fs_info, RESCAN_UUID_TREE) || 32104bbcaa64SEric Sandeen fs_info->generation != 32114bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 321205135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 321370f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 321470f80175SStefan Behrens if (ret) { 321505135f59SDavid Sterba btrfs_warn(fs_info, 321605135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 321770f80175SStefan Behrens close_ctree(tree_root); 321870f80175SStefan Behrens return ret; 321970f80175SStefan Behrens } 322070f80175SStefan Behrens } else { 3221afcdd129SJosef Bacik set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); 3222f7a81ea4SStefan Behrens } 3223afcdd129SJosef Bacik set_bit(BTRFS_FS_OPEN, &fs_info->flags); 322447ab2a6cSJosef Bacik 32258dcddfa0SQu Wenruo /* 32268dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 32278dcddfa0SQu Wenruo * no need to keep the flag 32288dcddfa0SQu Wenruo */ 32298dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 32308dcddfa0SQu Wenruo 3231ad2b2c80SAl Viro return 0; 323239279cc3SChris Mason 3233bcef60f2SArne Jansen fail_qgroup: 3234bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 32357c2ca468SChris Mason fail_trans_kthread: 32367c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 323754067ae9SJosef Bacik btrfs_cleanup_transaction(fs_info->tree_root); 3238faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 32393f157a2fSChris Mason fail_cleaner: 3240a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 32417c2ca468SChris Mason 32427c2ca468SChris Mason /* 32437c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 32447c2ca468SChris Mason * kthreads 32457c2ca468SChris Mason */ 32467c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 32477c2ca468SChris Mason 32482365dd3cSAnand Jain fail_sysfs: 32496618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 32502365dd3cSAnand Jain 3251b7c35e81SAnand Jain fail_fsdev_sysfs: 3252b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3253b7c35e81SAnand Jain 32541b1d1f66SJosef Bacik fail_block_groups: 325554067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 32561b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 3257af31f5e5SChris Mason 3258af31f5e5SChris Mason fail_tree_roots: 3259af31f5e5SChris Mason free_root_pointers(fs_info, 1); 32602b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3261af31f5e5SChris Mason 326239279cc3SChris Mason fail_sb_buffer: 32637abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 326416cdcec7SMiao Xie fail_alloc: 32654543df7eSChris Mason fail_iput: 3266586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3267586e46e2SIlya Dryomov 32684543df7eSChris Mason iput(fs_info->btree_inode); 3269c404e0dcSMiao Xie fail_bio_counter: 3270c404e0dcSMiao Xie percpu_counter_destroy(&fs_info->bio_counter); 3271963d678bSMiao Xie fail_delalloc_bytes: 3272963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3273e2d84521SMiao Xie fail_dirty_metadata_bytes: 3274e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3275ad081f14SJens Axboe fail_bdi: 32767e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 327776dda93cSYan, Zheng fail_srcu: 327876dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 32797e662854SQinghuang Feng fail: 328053b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 3281586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3282ad2b2c80SAl Viro return err; 3283af31f5e5SChris Mason 3284af31f5e5SChris Mason recovery_tree_root: 32853cdde224SJeff Mahoney if (!btrfs_test_opt(tree_root->fs_info, USEBACKUPROOT)) 3286af31f5e5SChris Mason goto fail_tree_roots; 3287af31f5e5SChris Mason 3288af31f5e5SChris Mason free_root_pointers(fs_info, 0); 3289af31f5e5SChris Mason 3290af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 3291af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 3292af31f5e5SChris Mason 3293af31f5e5SChris Mason /* we can't trust the free space cache either */ 3294af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 3295af31f5e5SChris Mason 3296af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 3297af31f5e5SChris Mason &num_backups_tried, &backup_index); 3298af31f5e5SChris Mason if (ret == -1) 3299af31f5e5SChris Mason goto fail_block_groups; 3300af31f5e5SChris Mason goto retry_root_backup; 3301eb60ceacSChris Mason } 3302eb60ceacSChris Mason 3303f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 3304f2984462SChris Mason { 3305f2984462SChris Mason if (uptodate) { 3306f2984462SChris Mason set_buffer_uptodate(bh); 3307f2984462SChris Mason } else { 3308442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 3309442a4f63SStefan Behrens bh->b_private; 3310442a4f63SStefan Behrens 3311b14af3b4SDavid Sterba btrfs_warn_rl_in_rcu(device->dev_root->fs_info, 3312b14af3b4SDavid Sterba "lost page write due to IO error on %s", 3313606686eeSJosef Bacik rcu_str_deref(device->name)); 331401327610SNicholas D Steeves /* note, we don't set_buffer_write_io_error because we have 33151259ab75SChris Mason * our own ways of dealing with the IO errors 33161259ab75SChris Mason */ 3317f2984462SChris Mason clear_buffer_uptodate(bh); 3318442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 3319f2984462SChris Mason } 3320f2984462SChris Mason unlock_buffer(bh); 3321f2984462SChris Mason put_bh(bh); 3322f2984462SChris Mason } 3323f2984462SChris Mason 332429c36d72SAnand Jain int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, 332529c36d72SAnand Jain struct buffer_head **bh_ret) 332629c36d72SAnand Jain { 332729c36d72SAnand Jain struct buffer_head *bh; 332829c36d72SAnand Jain struct btrfs_super_block *super; 332929c36d72SAnand Jain u64 bytenr; 333029c36d72SAnand Jain 333129c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 333229c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 333329c36d72SAnand Jain return -EINVAL; 333429c36d72SAnand Jain 333529c36d72SAnand Jain bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE); 333629c36d72SAnand Jain /* 333729c36d72SAnand Jain * If we fail to read from the underlying devices, as of now 333829c36d72SAnand Jain * the best option we have is to mark it EIO. 333929c36d72SAnand Jain */ 334029c36d72SAnand Jain if (!bh) 334129c36d72SAnand Jain return -EIO; 334229c36d72SAnand Jain 334329c36d72SAnand Jain super = (struct btrfs_super_block *)bh->b_data; 334429c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 334529c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 334629c36d72SAnand Jain brelse(bh); 334729c36d72SAnand Jain return -EINVAL; 334829c36d72SAnand Jain } 334929c36d72SAnand Jain 335029c36d72SAnand Jain *bh_ret = bh; 335129c36d72SAnand Jain return 0; 335229c36d72SAnand Jain } 335329c36d72SAnand Jain 335429c36d72SAnand Jain 3355a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 3356a512bbf8SYan Zheng { 3357a512bbf8SYan Zheng struct buffer_head *bh; 3358a512bbf8SYan Zheng struct buffer_head *latest = NULL; 3359a512bbf8SYan Zheng struct btrfs_super_block *super; 3360a512bbf8SYan Zheng int i; 3361a512bbf8SYan Zheng u64 transid = 0; 336292fc03fbSAnand Jain int ret = -EINVAL; 3363a512bbf8SYan Zheng 3364a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3365a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3366a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3367a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3368a512bbf8SYan Zheng */ 3369a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 337029c36d72SAnand Jain ret = btrfs_read_dev_one_super(bdev, i, &bh); 337129c36d72SAnand Jain if (ret) 3372a512bbf8SYan Zheng continue; 3373a512bbf8SYan Zheng 3374a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 3375a512bbf8SYan Zheng 3376a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 3377a512bbf8SYan Zheng brelse(latest); 3378a512bbf8SYan Zheng latest = bh; 3379a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3380a512bbf8SYan Zheng } else { 3381a512bbf8SYan Zheng brelse(bh); 3382a512bbf8SYan Zheng } 3383a512bbf8SYan Zheng } 338492fc03fbSAnand Jain 338592fc03fbSAnand Jain if (!latest) 338692fc03fbSAnand Jain return ERR_PTR(ret); 338792fc03fbSAnand Jain 3388a512bbf8SYan Zheng return latest; 3389a512bbf8SYan Zheng } 3390a512bbf8SYan Zheng 33914eedeb75SHisashi Hifumi /* 33924eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 33934eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 33944eedeb75SHisashi Hifumi * we write are pinned. 33954eedeb75SHisashi Hifumi * 33964eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 33974eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 33984eedeb75SHisashi Hifumi * many supers on this one device should be written. 33994eedeb75SHisashi Hifumi * 34004eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 34014eedeb75SHisashi Hifumi */ 3402a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3403a512bbf8SYan Zheng struct btrfs_super_block *sb, 3404a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 3405a512bbf8SYan Zheng { 3406a512bbf8SYan Zheng struct buffer_head *bh; 3407a512bbf8SYan Zheng int i; 3408a512bbf8SYan Zheng int ret; 3409a512bbf8SYan Zheng int errors = 0; 3410a512bbf8SYan Zheng u32 crc; 3411a512bbf8SYan Zheng u64 bytenr; 3412a512bbf8SYan Zheng 3413a512bbf8SYan Zheng if (max_mirrors == 0) 3414a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3415a512bbf8SYan Zheng 3416a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3417a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3418935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3419935e5cc9SMiao Xie device->commit_total_bytes) 3420a512bbf8SYan Zheng break; 3421a512bbf8SYan Zheng 3422a512bbf8SYan Zheng if (wait) { 3423a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 3424a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3425634554dcSJosef Bacik if (!bh) { 3426634554dcSJosef Bacik errors++; 3427634554dcSJosef Bacik continue; 3428634554dcSJosef Bacik } 3429a512bbf8SYan Zheng wait_on_buffer(bh); 34304eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 34314eedeb75SHisashi Hifumi errors++; 34324eedeb75SHisashi Hifumi 34334eedeb75SHisashi Hifumi /* drop our reference */ 34344eedeb75SHisashi Hifumi brelse(bh); 34354eedeb75SHisashi Hifumi 34364eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 3437a512bbf8SYan Zheng brelse(bh); 3438a512bbf8SYan Zheng continue; 3439a512bbf8SYan Zheng } else { 3440a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3441a512bbf8SYan Zheng 3442a512bbf8SYan Zheng crc = ~(u32)0; 3443b0496686SLiu Bo crc = btrfs_csum_data((char *)sb + 3444a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 3445a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 3446a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 3447a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 3448a512bbf8SYan Zheng 34494eedeb75SHisashi Hifumi /* 34504eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 34514eedeb75SHisashi Hifumi * caller 34524eedeb75SHisashi Hifumi */ 3453a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 3454a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3455634554dcSJosef Bacik if (!bh) { 3456f14d104dSDavid Sterba btrfs_err(device->dev_root->fs_info, 3457f14d104dSDavid Sterba "couldn't get super buffer head for bytenr %llu", 3458f14d104dSDavid Sterba bytenr); 3459634554dcSJosef Bacik errors++; 3460634554dcSJosef Bacik continue; 3461634554dcSJosef Bacik } 3462634554dcSJosef Bacik 3463a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3464a512bbf8SYan Zheng 34654eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3466a512bbf8SYan Zheng get_bh(bh); 34674eedeb75SHisashi Hifumi 34684eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3469a512bbf8SYan Zheng lock_buffer(bh); 3470a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3471442a4f63SStefan Behrens bh->b_private = device; 3472a512bbf8SYan Zheng } 3473a512bbf8SYan Zheng 3474387125fcSChris Mason /* 3475387125fcSChris Mason * we fua the first super. The others we allow 3476387125fcSChris Mason * to go down lazy. 3477387125fcSChris Mason */ 3478e8117c26SWang Shilong if (i == 0) 34792a222ca9SMike Christie ret = btrfsic_submit_bh(REQ_OP_WRITE, WRITE_FUA, bh); 3480e8117c26SWang Shilong else 34812a222ca9SMike Christie ret = btrfsic_submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh); 34824eedeb75SHisashi Hifumi if (ret) 3483a512bbf8SYan Zheng errors++; 3484a512bbf8SYan Zheng } 3485a512bbf8SYan Zheng return errors < i ? 0 : -1; 3486a512bbf8SYan Zheng } 3487a512bbf8SYan Zheng 3488387125fcSChris Mason /* 3489387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3490387125fcSChris Mason * for the barrier when it is done 3491387125fcSChris Mason */ 34924246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3493387125fcSChris Mason { 3494387125fcSChris Mason if (bio->bi_private) 3495387125fcSChris Mason complete(bio->bi_private); 3496387125fcSChris Mason bio_put(bio); 3497387125fcSChris Mason } 3498387125fcSChris Mason 3499387125fcSChris Mason /* 3500387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 3501387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 3502387125fcSChris Mason * 3503387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 3504387125fcSChris Mason * capable 3505387125fcSChris Mason */ 3506387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 3507387125fcSChris Mason { 3508387125fcSChris Mason struct bio *bio; 3509387125fcSChris Mason int ret = 0; 3510387125fcSChris Mason 3511387125fcSChris Mason if (device->nobarriers) 3512387125fcSChris Mason return 0; 3513387125fcSChris Mason 3514387125fcSChris Mason if (wait) { 3515387125fcSChris Mason bio = device->flush_bio; 3516387125fcSChris Mason if (!bio) 3517387125fcSChris Mason return 0; 3518387125fcSChris Mason 3519387125fcSChris Mason wait_for_completion(&device->flush_wait); 3520387125fcSChris Mason 35214246a0b6SChristoph Hellwig if (bio->bi_error) { 35224246a0b6SChristoph Hellwig ret = bio->bi_error; 3523442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 3524442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 3525387125fcSChris Mason } 3526387125fcSChris Mason 3527387125fcSChris Mason /* drop the reference from the wait == 0 run */ 3528387125fcSChris Mason bio_put(bio); 3529387125fcSChris Mason device->flush_bio = NULL; 3530387125fcSChris Mason 3531387125fcSChris Mason return ret; 3532387125fcSChris Mason } 3533387125fcSChris Mason 3534387125fcSChris Mason /* 3535387125fcSChris Mason * one reference for us, and we leave it for the 3536387125fcSChris Mason * caller 3537387125fcSChris Mason */ 35389c017abcSJesper Juhl device->flush_bio = NULL; 35399be3395bSChris Mason bio = btrfs_io_bio_alloc(GFP_NOFS, 0); 3540387125fcSChris Mason if (!bio) 3541387125fcSChris Mason return -ENOMEM; 3542387125fcSChris Mason 3543387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3544387125fcSChris Mason bio->bi_bdev = device->bdev; 354537226b21SMike Christie bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_FLUSH); 3546387125fcSChris Mason init_completion(&device->flush_wait); 3547387125fcSChris Mason bio->bi_private = &device->flush_wait; 3548387125fcSChris Mason device->flush_bio = bio; 3549387125fcSChris Mason 3550387125fcSChris Mason bio_get(bio); 35514e49ea4aSMike Christie btrfsic_submit_bio(bio); 3552387125fcSChris Mason 3553387125fcSChris Mason return 0; 3554387125fcSChris Mason } 3555387125fcSChris Mason 3556387125fcSChris Mason /* 3557387125fcSChris Mason * send an empty flush down to each device in parallel, 3558387125fcSChris Mason * then wait for them 3559387125fcSChris Mason */ 3560387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3561387125fcSChris Mason { 3562387125fcSChris Mason struct list_head *head; 3563387125fcSChris Mason struct btrfs_device *dev; 35645af3e8ccSStefan Behrens int errors_send = 0; 35655af3e8ccSStefan Behrens int errors_wait = 0; 3566387125fcSChris Mason int ret; 3567387125fcSChris Mason 3568387125fcSChris Mason /* send down all the barriers */ 3569387125fcSChris Mason head = &info->fs_devices->devices; 3570387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3571f88ba6a2SHidetoshi Seto if (dev->missing) 3572f88ba6a2SHidetoshi Seto continue; 3573387125fcSChris Mason if (!dev->bdev) { 35745af3e8ccSStefan Behrens errors_send++; 3575387125fcSChris Mason continue; 3576387125fcSChris Mason } 3577387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3578387125fcSChris Mason continue; 3579387125fcSChris Mason 3580387125fcSChris Mason ret = write_dev_flush(dev, 0); 3581387125fcSChris Mason if (ret) 35825af3e8ccSStefan Behrens errors_send++; 3583387125fcSChris Mason } 3584387125fcSChris Mason 3585387125fcSChris Mason /* wait for all the barriers */ 3586387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3587f88ba6a2SHidetoshi Seto if (dev->missing) 3588f88ba6a2SHidetoshi Seto continue; 3589387125fcSChris Mason if (!dev->bdev) { 35905af3e8ccSStefan Behrens errors_wait++; 3591387125fcSChris Mason continue; 3592387125fcSChris Mason } 3593387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3594387125fcSChris Mason continue; 3595387125fcSChris Mason 3596387125fcSChris Mason ret = write_dev_flush(dev, 1); 3597387125fcSChris Mason if (ret) 35985af3e8ccSStefan Behrens errors_wait++; 3599387125fcSChris Mason } 36005af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 36015af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3602387125fcSChris Mason return -EIO; 3603387125fcSChris Mason return 0; 3604387125fcSChris Mason } 3605387125fcSChris Mason 3606943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3607943c6e99SZhao Lei { 36088789f4feSZhao Lei int raid_type; 36098789f4feSZhao Lei int min_tolerated = INT_MAX; 3610943c6e99SZhao Lei 36118789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 36128789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 36138789f4feSZhao Lei min_tolerated = min(min_tolerated, 36148789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 36158789f4feSZhao Lei tolerated_failures); 3616943c6e99SZhao Lei 36178789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 36188789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 36198789f4feSZhao Lei continue; 36208789f4feSZhao Lei if (!(flags & btrfs_raid_group[raid_type])) 36218789f4feSZhao Lei continue; 36228789f4feSZhao Lei min_tolerated = min(min_tolerated, 36238789f4feSZhao Lei btrfs_raid_array[raid_type]. 36248789f4feSZhao Lei tolerated_failures); 36258789f4feSZhao Lei } 3626943c6e99SZhao Lei 36278789f4feSZhao Lei if (min_tolerated == INT_MAX) { 3628ab8d0fc4SJeff Mahoney pr_warn("BTRFS: unknown raid flag: %llu", flags); 36298789f4feSZhao Lei min_tolerated = 0; 36308789f4feSZhao Lei } 36318789f4feSZhao Lei 36328789f4feSZhao Lei return min_tolerated; 3633943c6e99SZhao Lei } 3634943c6e99SZhao Lei 36355af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 36365af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 36375af3e8ccSStefan Behrens { 36385af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 36395af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 36405af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 36415af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 36425af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 36435af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 36445af3e8ccSStefan Behrens int i; 36455af3e8ccSStefan Behrens int c; 36465af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 36475af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 36485af3e8ccSStefan Behrens 36492c458045SZhao Lei for (i = 0; i < ARRAY_SIZE(types); i++) { 36505af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 36515af3e8ccSStefan Behrens 36525af3e8ccSStefan Behrens sinfo = NULL; 36535af3e8ccSStefan Behrens rcu_read_lock(); 36545af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 36555af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 36565af3e8ccSStefan Behrens sinfo = tmp; 36575af3e8ccSStefan Behrens break; 36585af3e8ccSStefan Behrens } 36595af3e8ccSStefan Behrens } 36605af3e8ccSStefan Behrens rcu_read_unlock(); 36615af3e8ccSStefan Behrens 36625af3e8ccSStefan Behrens if (!sinfo) 36635af3e8ccSStefan Behrens continue; 36645af3e8ccSStefan Behrens 36655af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 36665af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 36675af3e8ccSStefan Behrens u64 flags; 36685af3e8ccSStefan Behrens 36692c458045SZhao Lei if (list_empty(&sinfo->block_groups[c])) 36702c458045SZhao Lei continue; 36712c458045SZhao Lei 36722c458045SZhao Lei btrfs_get_block_group_info(&sinfo->block_groups[c], 36732c458045SZhao Lei &space); 36742c458045SZhao Lei if (space.total_bytes == 0 || space.used_bytes == 0) 36755af3e8ccSStefan Behrens continue; 36765af3e8ccSStefan Behrens flags = space.flags; 3677943c6e99SZhao Lei 3678943c6e99SZhao Lei num_tolerated_disk_barrier_failures = min( 3679943c6e99SZhao Lei num_tolerated_disk_barrier_failures, 3680943c6e99SZhao Lei btrfs_get_num_tolerated_disk_barrier_failures( 3681943c6e99SZhao Lei flags)); 36825af3e8ccSStefan Behrens } 36835af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 36845af3e8ccSStefan Behrens } 36855af3e8ccSStefan Behrens 36865af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 36875af3e8ccSStefan Behrens } 36885af3e8ccSStefan Behrens 368948a3b636SEric Sandeen static int write_all_supers(struct btrfs_root *root, int max_mirrors) 3690f2984462SChris Mason { 3691e5e9a520SChris Mason struct list_head *head; 3692f2984462SChris Mason struct btrfs_device *dev; 3693a061fc8dSChris Mason struct btrfs_super_block *sb; 3694f2984462SChris Mason struct btrfs_dev_item *dev_item; 3695f2984462SChris Mason int ret; 3696f2984462SChris Mason int do_barriers; 3697a236aed1SChris Mason int max_errors; 3698a236aed1SChris Mason int total_errors = 0; 3699a061fc8dSChris Mason u64 flags; 3700f2984462SChris Mason 37013cdde224SJeff Mahoney do_barriers = !btrfs_test_opt(root->fs_info, NOBARRIER); 3702af31f5e5SChris Mason backup_super_roots(root->fs_info); 3703f2984462SChris Mason 37046c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3705a061fc8dSChris Mason dev_item = &sb->dev_item; 3706e5e9a520SChris Mason 3707174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3708e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3709d7306801SFilipe David Borba Manana max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3710387125fcSChris Mason 37115af3e8ccSStefan Behrens if (do_barriers) { 37125af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 37135af3e8ccSStefan Behrens if (ret) { 37145af3e8ccSStefan Behrens mutex_unlock( 37155af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 371634d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, ret, 37175af3e8ccSStefan Behrens "errors while submitting device barriers."); 37185af3e8ccSStefan Behrens return ret; 37195af3e8ccSStefan Behrens } 37205af3e8ccSStefan Behrens } 3721387125fcSChris Mason 37221f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3723dfe25020SChris Mason if (!dev->bdev) { 3724dfe25020SChris Mason total_errors++; 3725dfe25020SChris Mason continue; 3726dfe25020SChris Mason } 37272b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3728dfe25020SChris Mason continue; 3729dfe25020SChris Mason 37302b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3731a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3732a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 37337df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3734935e5cc9SMiao Xie dev->commit_total_bytes); 3735ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3736ce7213c7SMiao Xie dev->commit_bytes_used); 3737a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3738a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3739a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3740a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 37412b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3742a512bbf8SYan Zheng 3743a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3744a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3745f2984462SChris Mason 3746a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3747a236aed1SChris Mason if (ret) 3748a236aed1SChris Mason total_errors++; 3749f2984462SChris Mason } 3750a236aed1SChris Mason if (total_errors > max_errors) { 3751efe120a0SFrank Holton btrfs_err(root->fs_info, "%d errors while writing supers", 3752d397712bSChris Mason total_errors); 3753a724b436SStefan Behrens mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 375479787eaaSJeff Mahoney 37559d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 375634d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, -EIO, 37579d565ba4SStefan Behrens "%d errors while writing supers", total_errors); 37589d565ba4SStefan Behrens return -EIO; 3759a236aed1SChris Mason } 3760f2984462SChris Mason 3761a512bbf8SYan Zheng total_errors = 0; 37621f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3763dfe25020SChris Mason if (!dev->bdev) 3764dfe25020SChris Mason continue; 37652b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3766dfe25020SChris Mason continue; 3767dfe25020SChris Mason 3768a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3769a512bbf8SYan Zheng if (ret) 37701259ab75SChris Mason total_errors++; 3771f2984462SChris Mason } 3772174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3773a236aed1SChris Mason if (total_errors > max_errors) { 377434d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, -EIO, 377579787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 377679787eaaSJeff Mahoney return -EIO; 3777a236aed1SChris Mason } 3778f2984462SChris Mason return 0; 3779f2984462SChris Mason } 3780f2984462SChris Mason 3781a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3782a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3783cfaa7295SChris Mason { 3784f570e757SRashika return write_all_supers(root, max_mirrors); 3785cfaa7295SChris Mason } 3786cfaa7295SChris Mason 3787cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3788cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3789cb517eabSMiao Xie struct btrfs_root *root) 37902619ba1fSChris Mason { 37914df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 37922619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 37932619ba1fSChris Mason (unsigned long)root->root_key.objectid); 37944df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 379576dda93cSYan, Zheng 379676dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 379776dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 379876dda93cSYan, Zheng 37991c1ea4f7SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 38003321719eSLiu Bo btrfs_free_log(NULL, root); 38011c1ea4f7SLiu Bo if (root->reloc_root) { 38021c1ea4f7SLiu Bo free_extent_buffer(root->reloc_root->node); 38031c1ea4f7SLiu Bo free_extent_buffer(root->reloc_root->commit_root); 38041c1ea4f7SLiu Bo btrfs_put_fs_root(root->reloc_root); 38051c1ea4f7SLiu Bo root->reloc_root = NULL; 38061c1ea4f7SLiu Bo } 38071c1ea4f7SLiu Bo } 38083321719eSLiu Bo 3809faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3810581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3811faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3812581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 38134df27c4dSYan, Zheng free_fs_root(root); 38144df27c4dSYan, Zheng } 38154df27c4dSYan, Zheng 38164df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 38174df27c4dSYan, Zheng { 381857cdc8dbSDavid Sterba iput(root->ino_cache_inode); 38194df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 38201cb048f5SFilipe David Borba Manana btrfs_free_block_rsv(root, root->orphan_block_rsv); 38211cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 38220ee5dc67SAl Viro if (root->anon_dev) 38230ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 38248257b2dcSMiao Xie if (root->subv_writers) 38258257b2dcSMiao Xie btrfs_free_subvolume_writers(root->subv_writers); 38265f39d397SChris Mason free_extent_buffer(root->node); 38275f39d397SChris Mason free_extent_buffer(root->commit_root); 3828581bb050SLi Zefan kfree(root->free_ino_ctl); 3829581bb050SLi Zefan kfree(root->free_ino_pinned); 383058176a96SJosef Bacik kfree(root->name); 3831b0feb9d9SMiao Xie btrfs_put_fs_root(root); 38322619ba1fSChris Mason } 38332619ba1fSChris Mason 3834cb517eabSMiao Xie void btrfs_free_fs_root(struct btrfs_root *root) 3835cb517eabSMiao Xie { 3836cb517eabSMiao Xie free_fs_root(root); 3837eb60ceacSChris Mason } 3838eb60ceacSChris Mason 3839c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3840c146afadSYan Zheng { 3841c146afadSYan Zheng u64 root_objectid = 0; 3842c146afadSYan Zheng struct btrfs_root *gang[8]; 384365d33fd7SQu Wenruo int i = 0; 384465d33fd7SQu Wenruo int err = 0; 384565d33fd7SQu Wenruo unsigned int ret = 0; 384665d33fd7SQu Wenruo int index; 3847c146afadSYan Zheng 3848c146afadSYan Zheng while (1) { 384965d33fd7SQu Wenruo index = srcu_read_lock(&fs_info->subvol_srcu); 3850c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3851c146afadSYan Zheng (void **)gang, root_objectid, 3852c146afadSYan Zheng ARRAY_SIZE(gang)); 385365d33fd7SQu Wenruo if (!ret) { 385465d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 3855c146afadSYan Zheng break; 385665d33fd7SQu Wenruo } 38575d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 385866b4ffd1SJosef Bacik 385965d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 386065d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 386165d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 386265d33fd7SQu Wenruo gang[i] = NULL; 386365d33fd7SQu Wenruo continue; 386465d33fd7SQu Wenruo } 386565d33fd7SQu Wenruo /* grab all the search result for later use */ 386665d33fd7SQu Wenruo gang[i] = btrfs_grab_fs_root(gang[i]); 386765d33fd7SQu Wenruo } 386865d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 386965d33fd7SQu Wenruo 387065d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 387165d33fd7SQu Wenruo if (!gang[i]) 387265d33fd7SQu Wenruo continue; 3873c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 387466b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 387566b4ffd1SJosef Bacik if (err) 387665d33fd7SQu Wenruo break; 387765d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 3878c146afadSYan Zheng } 3879c146afadSYan Zheng root_objectid++; 3880c146afadSYan Zheng } 388165d33fd7SQu Wenruo 388265d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 388365d33fd7SQu Wenruo for (; i < ret; i++) { 388465d33fd7SQu Wenruo if (gang[i]) 388565d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 388665d33fd7SQu Wenruo } 388765d33fd7SQu Wenruo return err; 3888c146afadSYan Zheng } 3889c146afadSYan Zheng 3890c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3891c146afadSYan Zheng { 3892c146afadSYan Zheng struct btrfs_trans_handle *trans; 3893c146afadSYan Zheng 3894c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 389524bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3896c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 38979d1a2a3aSDavid Sterba wake_up_process(root->fs_info->cleaner_kthread); 3898c71bf099SYan, Zheng 3899c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3900c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3901c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3902c71bf099SYan, Zheng 39037a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 39043612b495STsutomu Itoh if (IS_ERR(trans)) 39053612b495STsutomu Itoh return PTR_ERR(trans); 3906d52c1bccSLiu Bo return btrfs_commit_transaction(trans, root); 3907c146afadSYan Zheng } 3908c146afadSYan Zheng 39093abdbd78SDavid Sterba void close_ctree(struct btrfs_root *root) 3910eb60ceacSChris Mason { 39110f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3912c146afadSYan Zheng int ret; 3913e089f05cSChris Mason 3914afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); 3915a2135011SChris Mason 39167343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 3917d06f23d6SJeff Mahoney btrfs_qgroup_wait_for_completion(fs_info, false); 39187343dd61SJustin Maggard 3919803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 3920803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 3921803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 3922803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 3923803b2f54SStefan Behrens 3924837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3925aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3926837d5b6eSIlya Dryomov 39278dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 39288dabb742SStefan Behrens 3929aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 39304cb5300bSChris Mason 39314cb5300bSChris Mason /* wait for any defraggers to finish */ 39324cb5300bSChris Mason wait_event(fs_info->transaction_wait, 39334cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 39344cb5300bSChris Mason 39354cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 393626176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 39374cb5300bSChris Mason 393821c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 393921c7e756SMiao Xie 3940c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3941e44163e1SJeff Mahoney /* 3942e44163e1SJeff Mahoney * If the cleaner thread is stopped and there are 3943e44163e1SJeff Mahoney * block groups queued for removal, the deletion will be 3944e44163e1SJeff Mahoney * skipped when we quit the cleaner thread. 3945e44163e1SJeff Mahoney */ 3946e44163e1SJeff Mahoney btrfs_delete_unused_bgs(root->fs_info); 3947e44163e1SJeff Mahoney 3948c146afadSYan Zheng ret = btrfs_commit_super(root); 3949d397712bSChris Mason if (ret) 395004892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 3951c146afadSYan Zheng } 3952ed2ff2cbSChris Mason 395387533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 395468ce9682SStefan Behrens btrfs_error_commit_super(root); 3955acce952bSliubo 3956e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3957e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 39588929ecfaSYan, Zheng 3959afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); 3960f25784b3SYan Zheng 396104892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 3962bcef60f2SArne Jansen 3963963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 396404892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 3965963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3966b0c68f8bSChris Mason } 396731153d81SYan Zheng 39686618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 3969b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 39705ac1d209SJeff Mahoney 3971faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 3972d10c5f31SChris Mason 39731a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 39741a4319ccSLiu Bo 39752b1360daSJosef Bacik btrfs_free_block_groups(fs_info); 39762b1360daSJosef Bacik 3977de348ee0SWang Shilong /* 3978de348ee0SWang Shilong * we must make sure there is not any read request to 3979de348ee0SWang Shilong * submit after we stopping all workers. 3980de348ee0SWang Shilong */ 3981de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 398296192499SJosef Bacik btrfs_stop_all_workers(fs_info); 398396192499SJosef Bacik 3984afcdd129SJosef Bacik clear_bit(BTRFS_FS_OPEN, &fs_info->flags); 398513e6c37bSJosef Bacik free_root_pointers(fs_info, 1); 39869ad6b7bcSChris Mason 398713e6c37bSJosef Bacik iput(fs_info->btree_inode); 3988d6bfde87SChris Mason 398921adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 39903cdde224SJeff Mahoney if (btrfs_test_opt(root->fs_info, CHECK_INTEGRITY)) 399121adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 399221adbd5cSStefan Behrens #endif 399321adbd5cSStefan Behrens 3994dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 39950b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3996b248a415SChris Mason 3997e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3998963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3999c404e0dcSMiao Xie percpu_counter_destroy(&fs_info->bio_counter); 400004160088SChris Mason bdi_destroy(&fs_info->bdi); 400176dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 40020b86a832SChris Mason 400353b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 400453b381b3SDavid Woodhouse 4005cdfb080eSChris Mason __btrfs_free_block_rsv(root->orphan_block_rsv); 40061cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 400704216820SFilipe Manana 400804216820SFilipe Manana lock_chunks(root); 400904216820SFilipe Manana while (!list_empty(&fs_info->pinned_chunks)) { 401004216820SFilipe Manana struct extent_map *em; 401104216820SFilipe Manana 401204216820SFilipe Manana em = list_first_entry(&fs_info->pinned_chunks, 401304216820SFilipe Manana struct extent_map, list); 401404216820SFilipe Manana list_del_init(&em->list); 401504216820SFilipe Manana free_extent_map(em); 401604216820SFilipe Manana } 401704216820SFilipe Manana unlock_chunks(root); 4018eb60ceacSChris Mason } 4019eb60ceacSChris Mason 4020b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 4021b9fab919SChris Mason int atomic) 4022ccd467d6SChris Mason { 40231259ab75SChris Mason int ret; 4024727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 40251259ab75SChris Mason 40260b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 40271259ab75SChris Mason if (!ret) 40281259ab75SChris Mason return ret; 40291259ab75SChris Mason 40301259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 4031b9fab919SChris Mason parent_transid, atomic); 4032b9fab919SChris Mason if (ret == -EAGAIN) 4033b9fab919SChris Mason return ret; 40341259ab75SChris Mason return !ret; 40355f39d397SChris Mason } 40366702ed49SChris Mason 40375f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 40385f39d397SChris Mason { 403906ea65a3SJosef Bacik struct btrfs_root *root; 40405f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 4041b9473439SChris Mason int was_dirty; 4042b4ce94deSChris Mason 404306ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 404406ea65a3SJosef Bacik /* 404506ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 404606ea65a3SJosef Bacik * enabled. Normal people shouldn't be marking dummy buffers as dirty 404706ea65a3SJosef Bacik * outside of the sanity tests. 404806ea65a3SJosef Bacik */ 404906ea65a3SJosef Bacik if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) 405006ea65a3SJosef Bacik return; 405106ea65a3SJosef Bacik #endif 405206ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 4053b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 405431b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 40555d163e0eSJeff Mahoney WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", 4056c1c9ff7cSGeert Uytterhoeven buf->start, transid, root->fs_info->generation); 40570b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 4058e2d84521SMiao Xie if (!was_dirty) 4059e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 4060e2d84521SMiao Xie buf->len, 4061e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 40621f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 40631f21ef0aSFilipe Manana if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { 40641f21ef0aSFilipe Manana btrfs_print_leaf(root, buf); 40651f21ef0aSFilipe Manana ASSERT(0); 40661f21ef0aSFilipe Manana } 40671f21ef0aSFilipe Manana #endif 4068eb60ceacSChris Mason } 4069eb60ceacSChris Mason 4070b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 4071b53d3f5dSLiu Bo int flush_delayed) 407235b7e476SChris Mason { 4073188de649SChris Mason /* 4074188de649SChris Mason * looks as though older kernels can get into trouble with 4075188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4076188de649SChris Mason */ 4077e2d84521SMiao Xie int ret; 4078d6bfde87SChris Mason 40796933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4080d6bfde87SChris Mason return; 4081d6bfde87SChris Mason 4082b53d3f5dSLiu Bo if (flush_delayed) 408316cdcec7SMiao Xie btrfs_balance_delayed_items(root); 408416cdcec7SMiao Xie 4085e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 4086e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 4087e2d84521SMiao Xie if (ret > 0) { 4088d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 4089d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 409016cdcec7SMiao Xie } 409116cdcec7SMiao Xie } 409216cdcec7SMiao Xie 4093b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 409416cdcec7SMiao Xie { 4095b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 409635b7e476SChris Mason } 4097b53d3f5dSLiu Bo 4098b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 4099b53d3f5dSLiu Bo { 4100b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 4101d6bfde87SChris Mason } 41026b80053dSChris Mason 4103ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 41046b80053dSChris Mason { 4105727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 41068436ea91SJosef Bacik return btree_read_extent_buffer_pages(root, buf, parent_transid); 41076b80053dSChris Mason } 41080da5468fSChris Mason 4109fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 4110acce952bSliubo int read_only) 4111acce952bSliubo { 4112c926093eSDavid Sterba struct btrfs_super_block *sb = fs_info->super_copy; 4113319e4d06SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 4114319e4d06SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 4115c926093eSDavid Sterba int ret = 0; 4116c926093eSDavid Sterba 4117319e4d06SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 4118ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "no valid FS found"); 4119319e4d06SQu Wenruo ret = -EINVAL; 4120319e4d06SQu Wenruo } 4121319e4d06SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) 4122ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, "unrecognized super flag: %llu", 4123319e4d06SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 412421e7626bSDavid Sterba if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 4125ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "tree_root level too big: %d >= %d", 412621e7626bSDavid Sterba btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 4127c926093eSDavid Sterba ret = -EINVAL; 4128c926093eSDavid Sterba } 412921e7626bSDavid Sterba if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 4130ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "chunk_root level too big: %d >= %d", 413121e7626bSDavid Sterba btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 4132c926093eSDavid Sterba ret = -EINVAL; 4133c926093eSDavid Sterba } 413421e7626bSDavid Sterba if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 4135ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "log_root level too big: %d >= %d", 413621e7626bSDavid Sterba btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 4137c926093eSDavid Sterba ret = -EINVAL; 4138c926093eSDavid Sterba } 4139c926093eSDavid Sterba 41401104a885SDavid Sterba /* 4141319e4d06SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 4142319e4d06SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 41431104a885SDavid Sterba */ 4144319e4d06SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 4145319e4d06SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 4146ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); 414775d6ad38SDavid Sterba ret = -EINVAL; 414875d6ad38SDavid Sterba } 4149319e4d06SQu Wenruo /* Only PAGE SIZE is supported yet */ 415009cbfeafSKirill A. Shutemov if (sectorsize != PAGE_SIZE) { 4151ab8d0fc4SJeff Mahoney btrfs_err(fs_info, 4152ab8d0fc4SJeff Mahoney "sectorsize %llu not supported yet, only support %lu", 415309cbfeafSKirill A. Shutemov sectorsize, PAGE_SIZE); 4154319e4d06SQu Wenruo ret = -EINVAL; 4155319e4d06SQu Wenruo } 4156319e4d06SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 4157319e4d06SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 4158ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "invalid nodesize %llu", nodesize); 4159319e4d06SQu Wenruo ret = -EINVAL; 4160319e4d06SQu Wenruo } 4161319e4d06SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 4162ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "invalid leafsize %u, should be %llu", 4163ab8d0fc4SJeff Mahoney le32_to_cpu(sb->__unused_leafsize), nodesize); 4164319e4d06SQu Wenruo ret = -EINVAL; 4165319e4d06SQu Wenruo } 4166319e4d06SQu Wenruo 4167319e4d06SQu Wenruo /* Root alignment check */ 4168319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 4169ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, "tree_root block unaligned: %llu", 4170319e4d06SQu Wenruo btrfs_super_root(sb)); 4171319e4d06SQu Wenruo ret = -EINVAL; 4172319e4d06SQu Wenruo } 4173319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 4174ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, "chunk_root block unaligned: %llu", 4175319e4d06SQu Wenruo btrfs_super_chunk_root(sb)); 4176319e4d06SQu Wenruo ret = -EINVAL; 4177319e4d06SQu Wenruo } 4178319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 4179ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, "log_root block unaligned: %llu", 4180319e4d06SQu Wenruo btrfs_super_log_root(sb)); 418175d6ad38SDavid Sterba ret = -EINVAL; 418275d6ad38SDavid Sterba } 418375d6ad38SDavid Sterba 4184c926093eSDavid Sterba if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { 4185ab8d0fc4SJeff Mahoney btrfs_err(fs_info, 4186ab8d0fc4SJeff Mahoney "dev_item UUID does not match fsid: %pU != %pU", 4187c926093eSDavid Sterba fs_info->fsid, sb->dev_item.fsid); 4188c926093eSDavid Sterba ret = -EINVAL; 4189c926093eSDavid Sterba } 4190c926093eSDavid Sterba 4191c926093eSDavid Sterba /* 4192c926093eSDavid Sterba * Hint to catch really bogus numbers, bitflips or so, more exact checks are 4193c926093eSDavid Sterba * done later 4194c926093eSDavid Sterba */ 419599e3ecfcSLiu Bo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 419699e3ecfcSLiu Bo btrfs_err(fs_info, "bytes_used is too small %llu", 419799e3ecfcSLiu Bo btrfs_super_bytes_used(sb)); 419899e3ecfcSLiu Bo ret = -EINVAL; 419999e3ecfcSLiu Bo } 4200b7f67055SChandan Rajendra if (!is_power_of_2(btrfs_super_stripesize(sb))) { 420199e3ecfcSLiu Bo btrfs_err(fs_info, "invalid stripesize %u", 420299e3ecfcSLiu Bo btrfs_super_stripesize(sb)); 420399e3ecfcSLiu Bo ret = -EINVAL; 420499e3ecfcSLiu Bo } 420521e7626bSDavid Sterba if (btrfs_super_num_devices(sb) > (1UL << 31)) 4206ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, "suspicious number of devices: %llu", 420721e7626bSDavid Sterba btrfs_super_num_devices(sb)); 420875d6ad38SDavid Sterba if (btrfs_super_num_devices(sb) == 0) { 4209ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "number of devices is 0"); 421075d6ad38SDavid Sterba ret = -EINVAL; 421175d6ad38SDavid Sterba } 4212c926093eSDavid Sterba 421321e7626bSDavid Sterba if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) { 4214ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "super offset mismatch %llu != %u", 421521e7626bSDavid Sterba btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 4216c926093eSDavid Sterba ret = -EINVAL; 4217c926093eSDavid Sterba } 4218c926093eSDavid Sterba 4219c926093eSDavid Sterba /* 4220ce7fca5fSDavid Sterba * Obvious sys_chunk_array corruptions, it must hold at least one key 4221ce7fca5fSDavid Sterba * and one chunk 4222ce7fca5fSDavid Sterba */ 4223ce7fca5fSDavid Sterba if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 4224ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "system chunk array too big %u > %u", 4225ce7fca5fSDavid Sterba btrfs_super_sys_array_size(sb), 4226ce7fca5fSDavid Sterba BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 4227ce7fca5fSDavid Sterba ret = -EINVAL; 4228ce7fca5fSDavid Sterba } 4229ce7fca5fSDavid Sterba if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 4230ce7fca5fSDavid Sterba + sizeof(struct btrfs_chunk)) { 4231ab8d0fc4SJeff Mahoney btrfs_err(fs_info, "system chunk array too small %u < %zu", 4232ce7fca5fSDavid Sterba btrfs_super_sys_array_size(sb), 4233ce7fca5fSDavid Sterba sizeof(struct btrfs_disk_key) 4234ce7fca5fSDavid Sterba + sizeof(struct btrfs_chunk)); 4235ce7fca5fSDavid Sterba ret = -EINVAL; 4236ce7fca5fSDavid Sterba } 4237ce7fca5fSDavid Sterba 4238ce7fca5fSDavid Sterba /* 4239c926093eSDavid Sterba * The generation is a global counter, we'll trust it more than the others 4240c926093eSDavid Sterba * but it's still possible that it's the one that's wrong. 4241c926093eSDavid Sterba */ 424221e7626bSDavid Sterba if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 4243ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, 4244ab8d0fc4SJeff Mahoney "suspicious: generation < chunk_root_generation: %llu < %llu", 4245ab8d0fc4SJeff Mahoney btrfs_super_generation(sb), 4246ab8d0fc4SJeff Mahoney btrfs_super_chunk_root_generation(sb)); 424721e7626bSDavid Sterba if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 424821e7626bSDavid Sterba && btrfs_super_cache_generation(sb) != (u64)-1) 4249ab8d0fc4SJeff Mahoney btrfs_warn(fs_info, 4250ab8d0fc4SJeff Mahoney "suspicious: generation < cache_generation: %llu < %llu", 4251ab8d0fc4SJeff Mahoney btrfs_super_generation(sb), 4252ab8d0fc4SJeff Mahoney btrfs_super_cache_generation(sb)); 4253c926093eSDavid Sterba 4254c926093eSDavid Sterba return ret; 4255fcd1f065SDavid Sterba } 4256fcd1f065SDavid Sterba 425748a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root) 4258acce952bSliubo { 4259acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 4260acce952bSliubo btrfs_run_delayed_iputs(root); 4261acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 4262acce952bSliubo 4263acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 4264acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 4265acce952bSliubo 4266acce952bSliubo /* cleanup FS via transaction */ 4267acce952bSliubo btrfs_cleanup_transaction(root); 4268acce952bSliubo } 4269acce952bSliubo 4270143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4271acce952bSliubo { 4272acce952bSliubo struct btrfs_ordered_extent *ordered; 4273acce952bSliubo 4274199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4275779880efSJosef Bacik /* 4276779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4277779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4278779880efSJosef Bacik */ 4279199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4280779880efSJosef Bacik root_extent_list) 4281779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4282199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4283199c2a9cSMiao Xie } 4284199c2a9cSMiao Xie 4285199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4286199c2a9cSMiao Xie { 4287199c2a9cSMiao Xie struct btrfs_root *root; 4288199c2a9cSMiao Xie struct list_head splice; 4289199c2a9cSMiao Xie 4290199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4291199c2a9cSMiao Xie 4292199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4293199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4294199c2a9cSMiao Xie while (!list_empty(&splice)) { 4295199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4296199c2a9cSMiao Xie ordered_root); 42971de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 42981de2cfdeSJosef Bacik &fs_info->ordered_roots); 4299199c2a9cSMiao Xie 43002a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4301199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4302199c2a9cSMiao Xie 43032a85d9caSLiu Bo cond_resched(); 43042a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4305199c2a9cSMiao Xie } 4306199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 4307acce952bSliubo } 4308acce952bSliubo 430935a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 4310acce952bSliubo struct btrfs_root *root) 4311acce952bSliubo { 4312acce952bSliubo struct rb_node *node; 4313acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4314acce952bSliubo struct btrfs_delayed_ref_node *ref; 4315acce952bSliubo int ret = 0; 4316acce952bSliubo 4317acce952bSliubo delayed_refs = &trans->delayed_refs; 4318acce952bSliubo 4319acce952bSliubo spin_lock(&delayed_refs->lock); 4320d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4321cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 4322efe120a0SFrank Holton btrfs_info(root->fs_info, "delayed_refs has NO entry"); 4323acce952bSliubo return ret; 4324acce952bSliubo } 4325acce952bSliubo 4326d7df2c79SJosef Bacik while ((node = rb_first(&delayed_refs->href_root)) != NULL) { 4327d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 4328c6fc2454SQu Wenruo struct btrfs_delayed_ref_node *tmp; 4329e78417d1SJosef Bacik bool pin_bytes = false; 4330acce952bSliubo 4331d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4332d7df2c79SJosef Bacik href_node); 4333b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 4334d7df2c79SJosef Bacik atomic_inc(&head->node.refs); 433579787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 4336b939d1abSJosef Bacik 4337acce952bSliubo mutex_lock(&head->mutex); 4338b939d1abSJosef Bacik mutex_unlock(&head->mutex); 4339d7df2c79SJosef Bacik btrfs_put_delayed_ref(&head->node); 4340e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 4341b939d1abSJosef Bacik continue; 4342b939d1abSJosef Bacik } 4343d7df2c79SJosef Bacik spin_lock(&head->lock); 4344c6fc2454SQu Wenruo list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list, 4345c6fc2454SQu Wenruo list) { 4346d7df2c79SJosef Bacik ref->in_tree = 0; 4347c6fc2454SQu Wenruo list_del(&ref->list); 4348d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4349d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4350d7df2c79SJosef Bacik } 435154067ae9SJosef Bacik if (head->must_insert_reserved) 4352e78417d1SJosef Bacik pin_bytes = true; 435378a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4354acce952bSliubo delayed_refs->num_heads--; 4355d7df2c79SJosef Bacik if (head->processing == 0) 4356acce952bSliubo delayed_refs->num_heads_ready--; 4357d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4358d7df2c79SJosef Bacik head->node.in_tree = 0; 4359c46effa6SLiu Bo rb_erase(&head->href_node, &delayed_refs->href_root); 4360d7df2c79SJosef Bacik spin_unlock(&head->lock); 4361acce952bSliubo spin_unlock(&delayed_refs->lock); 4362e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4363acce952bSliubo 4364d7df2c79SJosef Bacik if (pin_bytes) 4365d7df2c79SJosef Bacik btrfs_pin_extent(root, head->node.bytenr, 4366d7df2c79SJosef Bacik head->node.num_bytes, 1); 4367d7df2c79SJosef Bacik btrfs_put_delayed_ref(&head->node); 4368acce952bSliubo cond_resched(); 4369acce952bSliubo spin_lock(&delayed_refs->lock); 4370acce952bSliubo } 4371acce952bSliubo 4372acce952bSliubo spin_unlock(&delayed_refs->lock); 4373acce952bSliubo 4374acce952bSliubo return ret; 4375acce952bSliubo } 4376acce952bSliubo 4377143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4378acce952bSliubo { 4379acce952bSliubo struct btrfs_inode *btrfs_inode; 4380acce952bSliubo struct list_head splice; 4381acce952bSliubo 4382acce952bSliubo INIT_LIST_HEAD(&splice); 4383acce952bSliubo 4384eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4385eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4386acce952bSliubo 4387acce952bSliubo while (!list_empty(&splice)) { 4388eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4389acce952bSliubo delalloc_inodes); 4390acce952bSliubo 4391acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 4392df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 4393df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 4394eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4395acce952bSliubo 4396acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 4397b216cbfbSMiao Xie 4398eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4399acce952bSliubo } 4400acce952bSliubo 4401eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4402eb73c1b7SMiao Xie } 4403eb73c1b7SMiao Xie 4404eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4405eb73c1b7SMiao Xie { 4406eb73c1b7SMiao Xie struct btrfs_root *root; 4407eb73c1b7SMiao Xie struct list_head splice; 4408eb73c1b7SMiao Xie 4409eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4410eb73c1b7SMiao Xie 4411eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4412eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4413eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4414eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4415eb73c1b7SMiao Xie delalloc_root); 4416eb73c1b7SMiao Xie list_del_init(&root->delalloc_root); 4417eb73c1b7SMiao Xie root = btrfs_grab_fs_root(root); 4418eb73c1b7SMiao Xie BUG_ON(!root); 4419eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4420eb73c1b7SMiao Xie 4421eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 4422eb73c1b7SMiao Xie btrfs_put_fs_root(root); 4423eb73c1b7SMiao Xie 4424eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4425eb73c1b7SMiao Xie } 4426eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4427acce952bSliubo } 4428acce952bSliubo 4429acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 4430acce952bSliubo struct extent_io_tree *dirty_pages, 4431acce952bSliubo int mark) 4432acce952bSliubo { 4433acce952bSliubo int ret; 4434acce952bSliubo struct extent_buffer *eb; 4435acce952bSliubo u64 start = 0; 4436acce952bSliubo u64 end; 4437acce952bSliubo 4438acce952bSliubo while (1) { 4439acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4440e6138876SJosef Bacik mark, NULL); 4441acce952bSliubo if (ret) 4442acce952bSliubo break; 4443acce952bSliubo 444491166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4445acce952bSliubo while (start <= end) { 444601d58472SDaniel Dressler eb = btrfs_find_tree_block(root->fs_info, start); 4447707e8a07SDavid Sterba start += root->nodesize; 4448fd8b2b61SJosef Bacik if (!eb) 4449acce952bSliubo continue; 4450fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4451acce952bSliubo 4452fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4453fd8b2b61SJosef Bacik &eb->bflags)) 4454fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4455fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4456acce952bSliubo } 4457acce952bSliubo } 4458acce952bSliubo 4459acce952bSliubo return ret; 4460acce952bSliubo } 4461acce952bSliubo 4462acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 4463acce952bSliubo struct extent_io_tree *pinned_extents) 4464acce952bSliubo { 4465acce952bSliubo struct extent_io_tree *unpin; 4466acce952bSliubo u64 start; 4467acce952bSliubo u64 end; 4468acce952bSliubo int ret; 4469ed0eaa14SLiu Bo bool loop = true; 4470acce952bSliubo 4471acce952bSliubo unpin = pinned_extents; 4472ed0eaa14SLiu Bo again: 4473acce952bSliubo while (1) { 4474acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 4475e6138876SJosef Bacik EXTENT_DIRTY, NULL); 4476acce952bSliubo if (ret) 4477acce952bSliubo break; 4478acce952bSliubo 4479af6f8f60SDavid Sterba clear_extent_dirty(unpin, start, end); 4480acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 4481acce952bSliubo cond_resched(); 4482acce952bSliubo } 4483acce952bSliubo 4484ed0eaa14SLiu Bo if (loop) { 4485ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 4486ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 4487ed0eaa14SLiu Bo else 4488ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 4489ed0eaa14SLiu Bo loop = false; 4490ed0eaa14SLiu Bo goto again; 4491ed0eaa14SLiu Bo } 4492ed0eaa14SLiu Bo 4493acce952bSliubo return 0; 4494acce952bSliubo } 4495acce952bSliubo 4496c79a1751SLiu Bo static void btrfs_cleanup_bg_io(struct btrfs_block_group_cache *cache) 4497c79a1751SLiu Bo { 4498c79a1751SLiu Bo struct inode *inode; 4499c79a1751SLiu Bo 4500c79a1751SLiu Bo inode = cache->io_ctl.inode; 4501c79a1751SLiu Bo if (inode) { 4502c79a1751SLiu Bo invalidate_inode_pages2(inode->i_mapping); 4503c79a1751SLiu Bo BTRFS_I(inode)->generation = 0; 4504c79a1751SLiu Bo cache->io_ctl.inode = NULL; 4505c79a1751SLiu Bo iput(inode); 4506c79a1751SLiu Bo } 4507c79a1751SLiu Bo btrfs_put_block_group(cache); 4508c79a1751SLiu Bo } 4509c79a1751SLiu Bo 4510c79a1751SLiu Bo void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, 4511c79a1751SLiu Bo struct btrfs_root *root) 4512c79a1751SLiu Bo { 4513c79a1751SLiu Bo struct btrfs_block_group_cache *cache; 4514c79a1751SLiu Bo 4515c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4516c79a1751SLiu Bo while (!list_empty(&cur_trans->dirty_bgs)) { 4517c79a1751SLiu Bo cache = list_first_entry(&cur_trans->dirty_bgs, 4518c79a1751SLiu Bo struct btrfs_block_group_cache, 4519c79a1751SLiu Bo dirty_list); 4520c79a1751SLiu Bo if (!cache) { 4521c79a1751SLiu Bo btrfs_err(root->fs_info, 4522c79a1751SLiu Bo "orphan block group dirty_bgs list"); 4523c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4524c79a1751SLiu Bo return; 4525c79a1751SLiu Bo } 4526c79a1751SLiu Bo 4527c79a1751SLiu Bo if (!list_empty(&cache->io_list)) { 4528c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4529c79a1751SLiu Bo list_del_init(&cache->io_list); 4530c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4531c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4532c79a1751SLiu Bo } 4533c79a1751SLiu Bo 4534c79a1751SLiu Bo list_del_init(&cache->dirty_list); 4535c79a1751SLiu Bo spin_lock(&cache->lock); 4536c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4537c79a1751SLiu Bo spin_unlock(&cache->lock); 4538c79a1751SLiu Bo 4539c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4540c79a1751SLiu Bo btrfs_put_block_group(cache); 4541c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4542c79a1751SLiu Bo } 4543c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4544c79a1751SLiu Bo 4545c79a1751SLiu Bo while (!list_empty(&cur_trans->io_bgs)) { 4546c79a1751SLiu Bo cache = list_first_entry(&cur_trans->io_bgs, 4547c79a1751SLiu Bo struct btrfs_block_group_cache, 4548c79a1751SLiu Bo io_list); 4549c79a1751SLiu Bo if (!cache) { 4550c79a1751SLiu Bo btrfs_err(root->fs_info, 4551c79a1751SLiu Bo "orphan block group on io_bgs list"); 4552c79a1751SLiu Bo return; 4553c79a1751SLiu Bo } 4554c79a1751SLiu Bo 4555c79a1751SLiu Bo list_del_init(&cache->io_list); 4556c79a1751SLiu Bo spin_lock(&cache->lock); 4557c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4558c79a1751SLiu Bo spin_unlock(&cache->lock); 4559c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4560c79a1751SLiu Bo } 4561c79a1751SLiu Bo } 4562c79a1751SLiu Bo 456349b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 456449b25e05SJeff Mahoney struct btrfs_root *root) 456549b25e05SJeff Mahoney { 4566c79a1751SLiu Bo btrfs_cleanup_dirty_bgs(cur_trans, root); 4567c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->dirty_bgs)); 4568c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->io_bgs)); 4569c79a1751SLiu Bo 457049b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 457149b25e05SJeff Mahoney 45724a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 457349b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 457449b25e05SJeff Mahoney 45754a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 457649b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 457749b25e05SJeff Mahoney 457867cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 457967cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 458067cde344SMiao Xie 458149b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 458249b25e05SJeff Mahoney EXTENT_DIRTY); 45836e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 45846e841e32SLiu Bo root->fs_info->pinned_extents); 458549b25e05SJeff Mahoney 45864a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 45874a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 45884a9d8bdeSMiao Xie 458949b25e05SJeff Mahoney /* 459049b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 459149b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 459249b25e05SJeff Mahoney */ 459349b25e05SJeff Mahoney } 459449b25e05SJeff Mahoney 459548a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root) 4596acce952bSliubo { 4597acce952bSliubo struct btrfs_transaction *t; 4598acce952bSliubo 4599acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 4600acce952bSliubo 4601a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4602724e2315SJosef Bacik while (!list_empty(&root->fs_info->trans_list)) { 4603724e2315SJosef Bacik t = list_first_entry(&root->fs_info->trans_list, 4604724e2315SJosef Bacik struct btrfs_transaction, list); 4605724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 4606724e2315SJosef Bacik atomic_inc(&t->use_count); 4607724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4608724e2315SJosef Bacik btrfs_wait_for_commit(root, t->transid); 4609724e2315SJosef Bacik btrfs_put_transaction(t); 4610724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4611724e2315SJosef Bacik continue; 4612724e2315SJosef Bacik } 4613724e2315SJosef Bacik if (t == root->fs_info->running_transaction) { 4614724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 4615724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4616724e2315SJosef Bacik /* 4617724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4618724e2315SJosef Bacik * handle open currently for this transaction. 4619724e2315SJosef Bacik */ 4620724e2315SJosef Bacik wait_event(t->writer_wait, 4621724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4622724e2315SJosef Bacik } else { 4623724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4624724e2315SJosef Bacik } 4625724e2315SJosef Bacik btrfs_cleanup_one_transaction(t, root); 4626724e2315SJosef Bacik 4627724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4628724e2315SJosef Bacik if (t == root->fs_info->running_transaction) 4629ac673879SMiao Xie root->fs_info->running_transaction = NULL; 4630724e2315SJosef Bacik list_del_init(&t->list); 4631a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4632a4abeea4SJosef Bacik 4633724e2315SJosef Bacik btrfs_put_transaction(t); 4634724e2315SJosef Bacik trace_btrfs_transaction_commit(root); 4635724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4636724e2315SJosef Bacik } 4637724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4638199c2a9cSMiao Xie btrfs_destroy_all_ordered_extents(root->fs_info); 463967cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 464067cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 4641724e2315SJosef Bacik btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); 4642eb73c1b7SMiao Xie btrfs_destroy_all_delalloc_inodes(root->fs_info); 4643acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 4644acce952bSliubo 4645acce952bSliubo return 0; 4646acce952bSliubo } 4647acce952bSliubo 4648e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 4649ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 46504bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 46510b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 4652239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 4653239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 46540da5468fSChris Mason }; 4655