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 rw; 12844b8bd7eSChris Mason int mirror_num; 129c8b97818SChris Mason unsigned long bio_flags; 130eaf25d93SChris Mason /* 131eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 132eaf25d93SChris Mason * can't tell us where in the file the bio should go 133eaf25d93SChris Mason */ 134eaf25d93SChris Mason u64 bio_offset; 1358b712842SChris Mason struct btrfs_work work; 13679787eaaSJeff Mahoney int error; 13744b8bd7eSChris Mason }; 13844b8bd7eSChris Mason 13985d4e461SChris Mason /* 14085d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 14185d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 14285d4e461SChris Mason * the level the eb occupies in the tree. 1434008c04aSChris Mason * 14485d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 14585d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 14685d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 14785d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 14885d4e461SChris Mason * have separate keysets. 1494008c04aSChris Mason * 15085d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 15185d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 15285d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1534008c04aSChris Mason * 15485d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 15585d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 15685d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 15785d4e461SChris Mason * 15885d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 15985d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 16085d4e461SChris Mason * needs update as well. 1614008c04aSChris Mason */ 1624008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1634008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1644008c04aSChris Mason # error 1654008c04aSChris Mason # endif 16685d4e461SChris Mason 16785d4e461SChris Mason static struct btrfs_lockdep_keyset { 16885d4e461SChris Mason u64 id; /* root objectid */ 16985d4e461SChris Mason const char *name_stem; /* lock name stem */ 17085d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 17185d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 17285d4e461SChris Mason } btrfs_lockdep_keysets[] = { 17385d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 17485d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 17585d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 17685d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 17785d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 17885d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 17960b62978SDavid Sterba { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, 18085d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 18185d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 18285d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 18313fd8da9SDavid Sterba { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, 1846b20e0adSDavid Sterba { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, 18585d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1864008c04aSChris Mason }; 18785d4e461SChris Mason 18885d4e461SChris Mason void __init btrfs_init_lockdep(void) 18985d4e461SChris Mason { 19085d4e461SChris Mason int i, j; 19185d4e461SChris Mason 19285d4e461SChris Mason /* initialize lockdep class names */ 19385d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 19485d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 19585d4e461SChris Mason 19685d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 19785d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 19885d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 19985d4e461SChris Mason } 20085d4e461SChris Mason } 20185d4e461SChris Mason 20285d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 20385d4e461SChris Mason int level) 20485d4e461SChris Mason { 20585d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 20685d4e461SChris Mason 20785d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 20885d4e461SChris Mason 20985d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 21085d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 21185d4e461SChris Mason if (ks->id == objectid) 21285d4e461SChris Mason break; 21385d4e461SChris Mason 21485d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 21585d4e461SChris Mason &ks->keys[level], ks->names[level]); 21685d4e461SChris Mason } 21785d4e461SChris Mason 2184008c04aSChris Mason #endif 2194008c04aSChris Mason 220d352ac68SChris Mason /* 221d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 222d352ac68SChris Mason * that covers the entire device 223d352ac68SChris Mason */ 224b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 225306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 2265f39d397SChris Mason int create) 2275f39d397SChris Mason { 2285f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 2295f39d397SChris Mason struct extent_map *em; 2305f39d397SChris Mason int ret; 2315f39d397SChris Mason 232890871beSChris Mason read_lock(&em_tree->lock); 233d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 234a061fc8dSChris Mason if (em) { 235a061fc8dSChris Mason em->bdev = 236a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 237890871beSChris Mason read_unlock(&em_tree->lock); 2385f39d397SChris Mason goto out; 239a061fc8dSChris Mason } 240890871beSChris Mason read_unlock(&em_tree->lock); 2417b13b7b1SChris Mason 242172ddd60SDavid Sterba em = alloc_extent_map(); 2435f39d397SChris Mason if (!em) { 2445f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2455f39d397SChris Mason goto out; 2465f39d397SChris Mason } 2475f39d397SChris Mason em->start = 0; 2480afbaf8cSChris Mason em->len = (u64)-1; 249c8b97818SChris Mason em->block_len = (u64)-1; 2505f39d397SChris Mason em->block_start = 0; 251a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 252d1310b2eSChris Mason 253890871beSChris Mason write_lock(&em_tree->lock); 25409a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2555f39d397SChris Mason if (ret == -EEXIST) { 2565f39d397SChris Mason free_extent_map(em); 2577b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 258b4f359abSTsutomu Itoh if (!em) 2590433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2605f39d397SChris Mason } else if (ret) { 2617b13b7b1SChris Mason free_extent_map(em); 2620433f20dSTsutomu Itoh em = ERR_PTR(ret); 2635f39d397SChris Mason } 264890871beSChris Mason write_unlock(&em_tree->lock); 2657b13b7b1SChris Mason 2665f39d397SChris Mason out: 2675f39d397SChris Mason return em; 2685f39d397SChris Mason } 2695f39d397SChris Mason 270b0496686SLiu Bo u32 btrfs_csum_data(char *data, u32 seed, size_t len) 27119c00ddcSChris Mason { 2720b947affSFilipe David Borba Manana return btrfs_crc32c(seed, data, len); 27319c00ddcSChris Mason } 27419c00ddcSChris Mason 27519c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 27619c00ddcSChris Mason { 2777e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 27819c00ddcSChris Mason } 27919c00ddcSChris Mason 280d352ac68SChris Mason /* 281d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 282d352ac68SChris Mason * into the csum field of the block. 283d352ac68SChris Mason */ 28401d58472SDaniel Dressler static int csum_tree_block(struct btrfs_fs_info *fs_info, 28501d58472SDaniel Dressler struct extent_buffer *buf, 28619c00ddcSChris Mason int verify) 28719c00ddcSChris Mason { 28801d58472SDaniel Dressler u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 289607d432dSJosef Bacik char *result = NULL; 29019c00ddcSChris Mason unsigned long len; 29119c00ddcSChris Mason unsigned long cur_len; 29219c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 29319c00ddcSChris Mason char *kaddr; 29419c00ddcSChris Mason unsigned long map_start; 29519c00ddcSChris Mason unsigned long map_len; 29619c00ddcSChris Mason int err; 29719c00ddcSChris Mason u32 crc = ~(u32)0; 298607d432dSJosef Bacik unsigned long inline_result; 29919c00ddcSChris Mason 30019c00ddcSChris Mason len = buf->len - offset; 30119c00ddcSChris Mason while (len > 0) { 30219c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 303a6591715SChris Mason &kaddr, &map_start, &map_len); 304d397712bSChris Mason if (err) 3058bd98f0eSAlex Lyakas return err; 30619c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 307b0496686SLiu Bo crc = btrfs_csum_data(kaddr + offset - map_start, 30819c00ddcSChris Mason crc, cur_len); 30919c00ddcSChris Mason len -= cur_len; 31019c00ddcSChris Mason offset += cur_len; 31119c00ddcSChris Mason } 312607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 31331e818feSDavid Sterba result = kzalloc(csum_size, GFP_NOFS); 314607d432dSJosef Bacik if (!result) 3158bd98f0eSAlex Lyakas return -ENOMEM; 316607d432dSJosef Bacik } else { 317607d432dSJosef Bacik result = (char *)&inline_result; 318607d432dSJosef Bacik } 319607d432dSJosef Bacik 32019c00ddcSChris Mason btrfs_csum_final(crc, result); 32119c00ddcSChris Mason 32219c00ddcSChris Mason if (verify) { 323607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 324e4204dedSChris Mason u32 val; 325e4204dedSChris Mason u32 found = 0; 326607d432dSJosef Bacik memcpy(&found, result, csum_size); 327e4204dedSChris Mason 328607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 32994647322SDavid Sterba btrfs_warn_rl(fs_info, 33094647322SDavid Sterba "%s checksum verify failed on %llu wanted %X found %X " 33194647322SDavid Sterba "level %d", 33201d58472SDaniel Dressler fs_info->sb->s_id, buf->start, 333c1c9ff7cSGeert Uytterhoeven val, found, btrfs_header_level(buf)); 334607d432dSJosef Bacik if (result != (char *)&inline_result) 335607d432dSJosef Bacik kfree(result); 3368bd98f0eSAlex Lyakas return -EUCLEAN; 33719c00ddcSChris Mason } 33819c00ddcSChris Mason } else { 339607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 34019c00ddcSChris Mason } 341607d432dSJosef Bacik if (result != (char *)&inline_result) 342607d432dSJosef Bacik kfree(result); 34319c00ddcSChris Mason return 0; 34419c00ddcSChris Mason } 34519c00ddcSChris Mason 346d352ac68SChris Mason /* 347d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 348d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 349d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 350d352ac68SChris Mason * in the wrong place. 351d352ac68SChris Mason */ 3521259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 353b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 354b9fab919SChris Mason int atomic) 3551259ab75SChris Mason { 3562ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3571259ab75SChris Mason int ret; 3582755a0deSDavid Sterba bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); 3591259ab75SChris Mason 3601259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3611259ab75SChris Mason return 0; 3621259ab75SChris Mason 363b9fab919SChris Mason if (atomic) 364b9fab919SChris Mason return -EAGAIN; 365b9fab919SChris Mason 366a26e8c9fSJosef Bacik if (need_lock) { 367a26e8c9fSJosef Bacik btrfs_tree_read_lock(eb); 368a26e8c9fSJosef Bacik btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); 369a26e8c9fSJosef Bacik } 370a26e8c9fSJosef Bacik 3712ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 372ff13db41SDavid Sterba &cached_state); 3730b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3741259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3751259ab75SChris Mason ret = 0; 3761259ab75SChris Mason goto out; 3771259ab75SChris Mason } 37894647322SDavid Sterba btrfs_err_rl(eb->fs_info, 37994647322SDavid Sterba "parent transid verify failed on %llu wanted %llu found %llu", 38094647322SDavid Sterba eb->start, 38129549aecSWang Shilong parent_transid, btrfs_header_generation(eb)); 3821259ab75SChris Mason ret = 1; 383a26e8c9fSJosef Bacik 384a26e8c9fSJosef Bacik /* 385a26e8c9fSJosef Bacik * Things reading via commit roots that don't have normal protection, 386a26e8c9fSJosef Bacik * like send, can have a really old block in cache that may point at a 38701327610SNicholas D Steeves * block that has been freed and re-allocated. So don't clear uptodate 388a26e8c9fSJosef Bacik * if we find an eb that is under IO (dirty/writeback) because we could 389a26e8c9fSJosef Bacik * end up reading in the stale data and then writing it back out and 390a26e8c9fSJosef Bacik * making everybody very sad. 391a26e8c9fSJosef Bacik */ 392a26e8c9fSJosef Bacik if (!extent_buffer_under_io(eb)) 3930b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 39433958dc6SChris Mason out: 3952ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3962ac55d41SJosef Bacik &cached_state, GFP_NOFS); 397472b909fSJosef Bacik if (need_lock) 398a26e8c9fSJosef Bacik btrfs_tree_read_unlock_blocking(eb); 3991259ab75SChris Mason return ret; 4001259ab75SChris Mason } 4011259ab75SChris Mason 402d352ac68SChris Mason /* 4031104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 4041104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 4051104a885SDavid Sterba */ 4061104a885SDavid Sterba static int btrfs_check_super_csum(char *raw_disk_sb) 4071104a885SDavid Sterba { 4081104a885SDavid Sterba struct btrfs_super_block *disk_sb = 4091104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 4101104a885SDavid Sterba u16 csum_type = btrfs_super_csum_type(disk_sb); 4111104a885SDavid Sterba int ret = 0; 4121104a885SDavid Sterba 4131104a885SDavid Sterba if (csum_type == BTRFS_CSUM_TYPE_CRC32) { 4141104a885SDavid Sterba u32 crc = ~(u32)0; 4151104a885SDavid Sterba const int csum_size = sizeof(crc); 4161104a885SDavid Sterba char result[csum_size]; 4171104a885SDavid Sterba 4181104a885SDavid Sterba /* 4191104a885SDavid Sterba * The super_block structure does not span the whole 4201104a885SDavid Sterba * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space 42101327610SNicholas D Steeves * is filled with zeros and is included in the checksum. 4221104a885SDavid Sterba */ 4231104a885SDavid Sterba crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, 4241104a885SDavid Sterba crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 4251104a885SDavid Sterba btrfs_csum_final(crc, result); 4261104a885SDavid Sterba 4271104a885SDavid Sterba if (memcmp(raw_disk_sb, result, csum_size)) 4281104a885SDavid Sterba ret = 1; 4291104a885SDavid Sterba } 4301104a885SDavid Sterba 4311104a885SDavid Sterba if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { 432efe120a0SFrank Holton printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n", 4331104a885SDavid Sterba csum_type); 4341104a885SDavid Sterba ret = 1; 4351104a885SDavid Sterba } 4361104a885SDavid Sterba 4371104a885SDavid Sterba return ret; 4381104a885SDavid Sterba } 4391104a885SDavid Sterba 4401104a885SDavid Sterba /* 441d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 442d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 443d352ac68SChris Mason */ 444f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 445f188591eSChris Mason struct extent_buffer *eb, 446ca7a79adSChris Mason u64 start, u64 parent_transid) 447f188591eSChris Mason { 448f188591eSChris Mason struct extent_io_tree *io_tree; 449ea466794SJosef Bacik int failed = 0; 450f188591eSChris Mason int ret; 451f188591eSChris Mason int num_copies = 0; 452f188591eSChris Mason int mirror_num = 0; 453ea466794SJosef Bacik int failed_mirror = 0; 454f188591eSChris Mason 455a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 456f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 457f188591eSChris Mason while (1) { 458bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 459bb82ab88SArne Jansen WAIT_COMPLETE, 460f188591eSChris Mason btree_get_extent, mirror_num); 461256dd1bbSStefan Behrens if (!ret) { 462256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 463b9fab919SChris Mason parent_transid, 0)) 464ea466794SJosef Bacik break; 465256dd1bbSStefan Behrens else 466256dd1bbSStefan Behrens ret = -EIO; 467256dd1bbSStefan Behrens } 468d397712bSChris Mason 469a826d6dcSJosef Bacik /* 470a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 471a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 472a826d6dcSJosef Bacik * any less wrong. 473a826d6dcSJosef Bacik */ 474a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 475ea466794SJosef Bacik break; 476ea466794SJosef Bacik 4775d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 478f188591eSChris Mason eb->start, eb->len); 4794235298eSChris Mason if (num_copies == 1) 480ea466794SJosef Bacik break; 4814235298eSChris Mason 4825cf1ab56SJosef Bacik if (!failed_mirror) { 4835cf1ab56SJosef Bacik failed = 1; 4845cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4855cf1ab56SJosef Bacik } 4865cf1ab56SJosef Bacik 487f188591eSChris Mason mirror_num++; 488ea466794SJosef Bacik if (mirror_num == failed_mirror) 489ea466794SJosef Bacik mirror_num++; 490ea466794SJosef Bacik 4914235298eSChris Mason if (mirror_num > num_copies) 492ea466794SJosef Bacik break; 493f188591eSChris Mason } 494ea466794SJosef Bacik 495c0901581SStefan Behrens if (failed && !ret && failed_mirror) 496ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 497ea466794SJosef Bacik 498ea466794SJosef Bacik return ret; 499f188591eSChris Mason } 50019c00ddcSChris Mason 501d352ac68SChris Mason /* 502d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 503d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 504d352ac68SChris Mason */ 505d397712bSChris Mason 50601d58472SDaniel Dressler static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) 50719c00ddcSChris Mason { 5084eee4fa4SMiao Xie u64 start = page_offset(page); 50919c00ddcSChris Mason u64 found_start; 51019c00ddcSChris Mason struct extent_buffer *eb; 511f188591eSChris Mason 5124f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 5134f2de97aSJosef Bacik if (page != eb->pages[0]) 5144f2de97aSJosef Bacik return 0; 5150f805531SAlex Lyakas 51619c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 5170f805531SAlex Lyakas /* 5180f805531SAlex Lyakas * Please do not consolidate these warnings into a single if. 5190f805531SAlex Lyakas * It is useful to know what went wrong. 5200f805531SAlex Lyakas */ 5210f805531SAlex Lyakas if (WARN_ON(found_start != start)) 5220f805531SAlex Lyakas return -EUCLEAN; 5230f805531SAlex Lyakas if (WARN_ON(!PageUptodate(page))) 5240f805531SAlex Lyakas return -EUCLEAN; 5250f805531SAlex Lyakas 5260f805531SAlex Lyakas ASSERT(memcmp_extent_buffer(eb, fs_info->fsid, 5270f805531SAlex Lyakas btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); 5280f805531SAlex Lyakas 5298bd98f0eSAlex Lyakas return csum_tree_block(fs_info, eb, 0); 53019c00ddcSChris Mason } 53119c00ddcSChris Mason 53201d58472SDaniel Dressler static int check_tree_block_fsid(struct btrfs_fs_info *fs_info, 5332b82032cSYan Zheng struct extent_buffer *eb) 5342b82032cSYan Zheng { 53501d58472SDaniel Dressler struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; 5362b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 5372b82032cSYan Zheng int ret = 1; 5382b82032cSYan Zheng 5390a4e5586SRoss Kirk read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); 5402b82032cSYan Zheng while (fs_devices) { 5412b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 5422b82032cSYan Zheng ret = 0; 5432b82032cSYan Zheng break; 5442b82032cSYan Zheng } 5452b82032cSYan Zheng fs_devices = fs_devices->seed; 5462b82032cSYan Zheng } 5472b82032cSYan Zheng return ret; 5482b82032cSYan Zheng } 5492b82032cSYan Zheng 550a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 551efe120a0SFrank Holton btrfs_crit(root->fs_info, "corrupt leaf, %s: block=%llu," \ 552efe120a0SFrank Holton "root=%llu, slot=%d", reason, \ 553c1c9ff7cSGeert Uytterhoeven btrfs_header_bytenr(eb), root->objectid, slot) 554a826d6dcSJosef Bacik 555a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 556a826d6dcSJosef Bacik struct extent_buffer *leaf) 557a826d6dcSJosef Bacik { 558a826d6dcSJosef Bacik struct btrfs_key key; 559a826d6dcSJosef Bacik struct btrfs_key leaf_key; 560a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 561a826d6dcSJosef Bacik int slot; 562a826d6dcSJosef Bacik 563a826d6dcSJosef Bacik if (nritems == 0) 564a826d6dcSJosef Bacik return 0; 565a826d6dcSJosef Bacik 566a826d6dcSJosef Bacik /* Check the 0 item */ 567a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 568a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 569a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 570a826d6dcSJosef Bacik return -EIO; 571a826d6dcSJosef Bacik } 572a826d6dcSJosef Bacik 573a826d6dcSJosef Bacik /* 574a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 575a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 576a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 577a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 578a826d6dcSJosef Bacik * offset is correct. 579a826d6dcSJosef Bacik */ 580a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 581a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 582a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 583a826d6dcSJosef Bacik 584a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 585a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 586a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 587a826d6dcSJosef Bacik return -EIO; 588a826d6dcSJosef Bacik } 589a826d6dcSJosef Bacik 590a826d6dcSJosef Bacik /* 591a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 592a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 593a826d6dcSJosef Bacik * front. 594a826d6dcSJosef Bacik */ 595a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 596a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 597a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 598a826d6dcSJosef Bacik return -EIO; 599a826d6dcSJosef Bacik } 600a826d6dcSJosef Bacik 601a826d6dcSJosef Bacik /* 602a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 603a826d6dcSJosef Bacik * just in case all the items are consistent to each other, but 604a826d6dcSJosef Bacik * all point outside of the leaf. 605a826d6dcSJosef Bacik */ 606a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 607a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 608a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 609a826d6dcSJosef Bacik return -EIO; 610a826d6dcSJosef Bacik } 611a826d6dcSJosef Bacik } 612a826d6dcSJosef Bacik 613a826d6dcSJosef Bacik return 0; 614a826d6dcSJosef Bacik } 615a826d6dcSJosef Bacik 616facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 617facc8a22SMiao Xie u64 phy_offset, struct page *page, 618facc8a22SMiao Xie u64 start, u64 end, int mirror) 619ce9adaa5SChris Mason { 620ce9adaa5SChris Mason u64 found_start; 621ce9adaa5SChris Mason int found_level; 622ce9adaa5SChris Mason struct extent_buffer *eb; 623ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 62402873e43SZhao Lei struct btrfs_fs_info *fs_info = root->fs_info; 625f188591eSChris Mason int ret = 0; 626727011e0SChris Mason int reads_done; 627ce9adaa5SChris Mason 628ce9adaa5SChris Mason if (!page->private) 629ce9adaa5SChris Mason goto out; 630d397712bSChris Mason 6314f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 632d397712bSChris Mason 6330b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 6340b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 6350b32f4bbSJosef Bacik */ 6360b32f4bbSJosef Bacik extent_buffer_get(eb); 6370b32f4bbSJosef Bacik 6380b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 639727011e0SChris Mason if (!reads_done) 640727011e0SChris Mason goto err; 641f188591eSChris Mason 6425cf1ab56SJosef Bacik eb->read_mirror = mirror; 643656f30dbSFilipe Manana if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { 644ea466794SJosef Bacik ret = -EIO; 645ea466794SJosef Bacik goto err; 646ea466794SJosef Bacik } 647ea466794SJosef Bacik 648ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 649727011e0SChris Mason if (found_start != eb->start) { 65002873e43SZhao Lei btrfs_err_rl(fs_info, "bad tree block start %llu %llu", 65194647322SDavid Sterba found_start, eb->start); 652f188591eSChris Mason ret = -EIO; 653ce9adaa5SChris Mason goto err; 654ce9adaa5SChris Mason } 65502873e43SZhao Lei if (check_tree_block_fsid(fs_info, eb)) { 65602873e43SZhao Lei btrfs_err_rl(fs_info, "bad fsid on block %llu", 65794647322SDavid Sterba eb->start); 6581259ab75SChris Mason ret = -EIO; 6591259ab75SChris Mason goto err; 6601259ab75SChris Mason } 661ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6621c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 66302873e43SZhao Lei btrfs_err(fs_info, "bad tree block level %d", 6641c24c3ceSJosef Bacik (int)btrfs_header_level(eb)); 6651c24c3ceSJosef Bacik ret = -EIO; 6661c24c3ceSJosef Bacik goto err; 6671c24c3ceSJosef Bacik } 668ce9adaa5SChris Mason 66985d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 67085d4e461SChris Mason eb, found_level); 6714008c04aSChris Mason 67202873e43SZhao Lei ret = csum_tree_block(fs_info, eb, 1); 6738bd98f0eSAlex Lyakas if (ret) 674a826d6dcSJosef Bacik goto err; 675a826d6dcSJosef Bacik 676a826d6dcSJosef Bacik /* 677a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 678a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 679a826d6dcSJosef Bacik * return -EIO. 680a826d6dcSJosef Bacik */ 681a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 682a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 683a826d6dcSJosef Bacik ret = -EIO; 684a826d6dcSJosef Bacik } 685ce9adaa5SChris Mason 6860b32f4bbSJosef Bacik if (!ret) 6870b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 688ce9adaa5SChris Mason err: 68979fb65a1SJosef Bacik if (reads_done && 69079fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 69102873e43SZhao Lei btree_readahead_hook(fs_info, eb, eb->start, ret); 6924bb31e92SArne Jansen 69353b381b3SDavid Woodhouse if (ret) { 69453b381b3SDavid Woodhouse /* 69553b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 69653b381b3SDavid Woodhouse * again, we have to make sure it has something 69753b381b3SDavid Woodhouse * to decrement 69853b381b3SDavid Woodhouse */ 69953b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 7000b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 70153b381b3SDavid Woodhouse } 7020b32f4bbSJosef Bacik free_extent_buffer(eb); 703ce9adaa5SChris Mason out: 704f188591eSChris Mason return ret; 705ce9adaa5SChris Mason } 706ce9adaa5SChris Mason 707ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 7084bb31e92SArne Jansen { 7094bb31e92SArne Jansen struct extent_buffer *eb; 7104bb31e92SArne Jansen 7114f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 712656f30dbSFilipe Manana set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); 7135cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 71453b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 715ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 71602873e43SZhao Lei btree_readahead_hook(eb->fs_info, eb, eb->start, -EIO); 7174bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 7184bb31e92SArne Jansen } 7194bb31e92SArne Jansen 7204246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 721ce9adaa5SChris Mason { 72297eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 723ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 7249e0af237SLiu Bo struct btrfs_workqueue *wq; 7259e0af237SLiu Bo btrfs_work_func_t func; 726ce9adaa5SChris Mason 727ce9adaa5SChris Mason fs_info = end_io_wq->info; 7284246a0b6SChristoph Hellwig end_io_wq->error = bio->bi_error; 729d20f7043SChris Mason 7307b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 7319e0af237SLiu Bo if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { 7329e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 7339e0af237SLiu Bo func = btrfs_endio_meta_write_helper; 7349e0af237SLiu Bo } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { 7359e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 7369e0af237SLiu Bo func = btrfs_freespace_write_helper; 7379e0af237SLiu Bo } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { 7389e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 7399e0af237SLiu Bo func = btrfs_endio_raid56_helper; 740d20f7043SChris Mason } else { 7419e0af237SLiu Bo wq = fs_info->endio_write_workers; 7429e0af237SLiu Bo func = btrfs_endio_write_helper; 743d20f7043SChris Mason } 7449e0af237SLiu Bo } else { 7458b110e39SMiao Xie if (unlikely(end_io_wq->metadata == 7468b110e39SMiao Xie BTRFS_WQ_ENDIO_DIO_REPAIR)) { 7478b110e39SMiao Xie wq = fs_info->endio_repair_workers; 7488b110e39SMiao Xie func = btrfs_endio_repair_helper; 7498b110e39SMiao Xie } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { 7509e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 7519e0af237SLiu Bo func = btrfs_endio_raid56_helper; 7529e0af237SLiu Bo } else if (end_io_wq->metadata) { 7539e0af237SLiu Bo wq = fs_info->endio_meta_workers; 7549e0af237SLiu Bo func = btrfs_endio_meta_helper; 7559e0af237SLiu Bo } else { 7569e0af237SLiu Bo wq = fs_info->endio_workers; 7579e0af237SLiu Bo func = btrfs_endio_helper; 7589e0af237SLiu Bo } 7599e0af237SLiu Bo } 7609e0af237SLiu Bo 7619e0af237SLiu Bo btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); 7629e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 763ce9adaa5SChris Mason } 764ce9adaa5SChris Mason 76522c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 766bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 7670b86a832SChris Mason { 76897eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 7698b110e39SMiao Xie 77097eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 771ce9adaa5SChris Mason if (!end_io_wq) 772ce9adaa5SChris Mason return -ENOMEM; 773ce9adaa5SChris Mason 774ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 775ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 77622c59948SChris Mason end_io_wq->info = info; 777ce9adaa5SChris Mason end_io_wq->error = 0; 778ce9adaa5SChris Mason end_io_wq->bio = bio; 77922c59948SChris Mason end_io_wq->metadata = metadata; 780ce9adaa5SChris Mason 781ce9adaa5SChris Mason bio->bi_private = end_io_wq; 782ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 78322c59948SChris Mason return 0; 78422c59948SChris Mason } 78522c59948SChris Mason 786b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7874854ddd0SChris Mason { 7884854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7895cdc7ad3SQu Wenruo info->thread_pool_size, 7904854ddd0SChris Mason info->fs_devices->open_devices); 7914854ddd0SChris Mason return 256 * limit; 7924854ddd0SChris Mason } 7934854ddd0SChris Mason 7944a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7954a69a410SChris Mason { 7964a69a410SChris Mason struct async_submit_bio *async; 79779787eaaSJeff Mahoney int ret; 7984a69a410SChris Mason 7994a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 80079787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 801eaf25d93SChris Mason async->mirror_num, async->bio_flags, 802eaf25d93SChris Mason async->bio_offset); 80379787eaaSJeff Mahoney if (ret) 80479787eaaSJeff Mahoney async->error = ret; 8054a69a410SChris Mason } 8064a69a410SChris Mason 8074a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 8088b712842SChris Mason { 8098b712842SChris Mason struct btrfs_fs_info *fs_info; 8108b712842SChris Mason struct async_submit_bio *async; 8114854ddd0SChris Mason int limit; 8128b712842SChris Mason 8138b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 8148b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 8154854ddd0SChris Mason 816b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 8174854ddd0SChris Mason limit = limit * 2 / 3; 8184854ddd0SChris Mason 819ee863954SDavid Sterba /* 820ee863954SDavid Sterba * atomic_dec_return implies a barrier for waitqueue_active 821ee863954SDavid Sterba */ 82266657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 823b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 8244854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 8254854ddd0SChris Mason 826bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 82779787eaaSJeff Mahoney if (async->error) { 8284246a0b6SChristoph Hellwig async->bio->bi_error = async->error; 8294246a0b6SChristoph Hellwig bio_endio(async->bio); 83079787eaaSJeff Mahoney return; 83179787eaaSJeff Mahoney } 83279787eaaSJeff Mahoney 8334a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 834eaf25d93SChris Mason async->mirror_num, async->bio_flags, 835eaf25d93SChris Mason async->bio_offset); 8364a69a410SChris Mason } 8374a69a410SChris Mason 8384a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 8394a69a410SChris Mason { 8404a69a410SChris Mason struct async_submit_bio *async; 8414a69a410SChris Mason 8424a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 8438b712842SChris Mason kfree(async); 8448b712842SChris Mason } 8458b712842SChris Mason 84644b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 84744b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 848c8b97818SChris Mason unsigned long bio_flags, 849eaf25d93SChris Mason u64 bio_offset, 8504a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 8514a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 85244b8bd7eSChris Mason { 85344b8bd7eSChris Mason struct async_submit_bio *async; 85444b8bd7eSChris Mason 85544b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 85644b8bd7eSChris Mason if (!async) 85744b8bd7eSChris Mason return -ENOMEM; 85844b8bd7eSChris Mason 85944b8bd7eSChris Mason async->inode = inode; 86044b8bd7eSChris Mason async->rw = rw; 86144b8bd7eSChris Mason async->bio = bio; 86244b8bd7eSChris Mason async->mirror_num = mirror_num; 8634a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8644a69a410SChris Mason async->submit_bio_done = submit_bio_done; 8654a69a410SChris Mason 8669e0af237SLiu Bo btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, 8675cdc7ad3SQu Wenruo run_one_async_done, run_one_async_free); 8684a69a410SChris Mason 869c8b97818SChris Mason async->bio_flags = bio_flags; 870eaf25d93SChris Mason async->bio_offset = bio_offset; 8718c8bee1dSChris Mason 87279787eaaSJeff Mahoney async->error = 0; 87379787eaaSJeff Mahoney 874cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 875d313d7a3SChris Mason 8767b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 8775cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 878d313d7a3SChris Mason 8795cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 8809473f16cSChris Mason 881771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 882771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 883771ed689SChris Mason wait_event(fs_info->async_submit_wait, 884771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 885771ed689SChris Mason } 886771ed689SChris Mason 88744b8bd7eSChris Mason return 0; 88844b8bd7eSChris Mason } 88944b8bd7eSChris Mason 890ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 891ce3ed71aSChris Mason { 8922c30c71bSKent Overstreet struct bio_vec *bvec; 893ce3ed71aSChris Mason struct btrfs_root *root; 8942c30c71bSKent Overstreet int i, ret = 0; 895ce3ed71aSChris Mason 8962c30c71bSKent Overstreet bio_for_each_segment_all(bvec, bio, i) { 897ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 89801d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 89979787eaaSJeff Mahoney if (ret) 90079787eaaSJeff Mahoney break; 901ce3ed71aSChris Mason } 9022c30c71bSKent Overstreet 90379787eaaSJeff Mahoney return ret; 904ce3ed71aSChris Mason } 905ce3ed71aSChris Mason 9064a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 9074a69a410SChris Mason struct bio *bio, int mirror_num, 908eaf25d93SChris Mason unsigned long bio_flags, 909eaf25d93SChris Mason u64 bio_offset) 91022c59948SChris Mason { 9118b712842SChris Mason /* 9128b712842SChris Mason * when we're called for a write, we're already in the async 9135443be45SChris Mason * submission context. Just jump into btrfs_map_bio 9148b712842SChris Mason */ 91579787eaaSJeff Mahoney return btree_csum_one_bio(bio); 91622c59948SChris Mason } 91722c59948SChris Mason 9184a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 919eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 920eaf25d93SChris Mason u64 bio_offset) 9214a69a410SChris Mason { 92261891923SStefan Behrens int ret; 92361891923SStefan Behrens 9248b712842SChris Mason /* 9254a69a410SChris Mason * when we're called for a write, we're already in the async 9264a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 9278b712842SChris Mason */ 92861891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 9294246a0b6SChristoph Hellwig if (ret) { 9304246a0b6SChristoph Hellwig bio->bi_error = ret; 9314246a0b6SChristoph Hellwig bio_endio(bio); 9324246a0b6SChristoph Hellwig } 93361891923SStefan Behrens return ret; 9340b86a832SChris Mason } 9350b86a832SChris Mason 936de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 937de0022b9SJosef Bacik { 938de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 939de0022b9SJosef Bacik return 0; 940de0022b9SJosef Bacik #ifdef CONFIG_X86 941bc696ca0SBorislav Petkov if (static_cpu_has(X86_FEATURE_XMM4_2)) 942de0022b9SJosef Bacik return 0; 943de0022b9SJosef Bacik #endif 944de0022b9SJosef Bacik return 1; 945de0022b9SJosef Bacik } 946de0022b9SJosef Bacik 94744b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 948eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 949eaf25d93SChris Mason u64 bio_offset) 95044b8bd7eSChris Mason { 951de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 9524a69a410SChris Mason int ret; 953cad321adSChris Mason 9547b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 955cad321adSChris Mason /* 956cad321adSChris Mason * called for a read, do the setup so that checksum validation 957cad321adSChris Mason * can happen in the async kernel threads 958cad321adSChris Mason */ 959f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 960bfebd8b5SDavid Sterba bio, BTRFS_WQ_ENDIO_METADATA); 9611d4284bdSChris Mason if (ret) 96261891923SStefan Behrens goto out_w_error; 96361891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 9646f3577bdSChris Mason mirror_num, 0); 965de0022b9SJosef Bacik } else if (!async) { 966de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 967de0022b9SJosef Bacik if (ret) 96861891923SStefan Behrens goto out_w_error; 96961891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 970de0022b9SJosef Bacik mirror_num, 0); 97161891923SStefan Behrens } else { 972cad321adSChris Mason /* 97361891923SStefan Behrens * kthread helpers are used to submit writes so that 97461891923SStefan Behrens * checksumming can happen in parallel across all CPUs 975cad321adSChris Mason */ 97661891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 977c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 978eaf25d93SChris Mason bio_offset, 9794a69a410SChris Mason __btree_submit_bio_start, 9804a69a410SChris Mason __btree_submit_bio_done); 98144b8bd7eSChris Mason } 98244b8bd7eSChris Mason 9834246a0b6SChristoph Hellwig if (ret) 9844246a0b6SChristoph Hellwig goto out_w_error; 9854246a0b6SChristoph Hellwig return 0; 9864246a0b6SChristoph Hellwig 98761891923SStefan Behrens out_w_error: 9884246a0b6SChristoph Hellwig bio->bi_error = ret; 9894246a0b6SChristoph Hellwig bio_endio(bio); 99061891923SStefan Behrens return ret; 99161891923SStefan Behrens } 99261891923SStefan Behrens 9933dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 994784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 995a6bc32b8SMel Gorman struct page *newpage, struct page *page, 996a6bc32b8SMel Gorman enum migrate_mode mode) 997784b4e29SChris Mason { 998784b4e29SChris Mason /* 999784b4e29SChris Mason * we can't safely write a btree page from here, 1000784b4e29SChris Mason * we haven't done the locking hook 1001784b4e29SChris Mason */ 1002784b4e29SChris Mason if (PageDirty(page)) 1003784b4e29SChris Mason return -EAGAIN; 1004784b4e29SChris Mason /* 1005784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 1006784b4e29SChris Mason * We must have no buffers or drop them. 1007784b4e29SChris Mason */ 1008784b4e29SChris Mason if (page_has_private(page) && 1009784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 1010784b4e29SChris Mason return -EAGAIN; 1011a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 1012784b4e29SChris Mason } 10133dd1462eSJan Beulich #endif 1014784b4e29SChris Mason 10150da5468fSChris Mason 10160da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 10170da5468fSChris Mason struct writeback_control *wbc) 10180da5468fSChris Mason { 1019e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 1020e2d84521SMiao Xie int ret; 1021e2d84521SMiao Xie 1022d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 1023448d640bSChris Mason 1024448d640bSChris Mason if (wbc->for_kupdate) 1025448d640bSChris Mason return 0; 1026448d640bSChris Mason 1027e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 1028b9473439SChris Mason /* this is a bit racy, but that's ok */ 1029e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 1030e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 1031e2d84521SMiao Xie if (ret < 0) 1032793955bcSChris Mason return 0; 1033793955bcSChris Mason } 10340b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 10350da5468fSChris Mason } 10360da5468fSChris Mason 1037b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 10385f39d397SChris Mason { 1039d1310b2eSChris Mason struct extent_io_tree *tree; 1040d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10418ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 10425f39d397SChris Mason } 10435f39d397SChris Mason 104470dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 10455f39d397SChris Mason { 104698509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 104798509cfcSChris Mason return 0; 10480c4e538bSDavid Sterba 1049f7a52a40SDavid Sterba return try_release_extent_buffer(page); 1050d98237b3SChris Mason } 1051d98237b3SChris Mason 1052d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 1053d47992f8SLukas Czerner unsigned int length) 1054d98237b3SChris Mason { 1055d1310b2eSChris Mason struct extent_io_tree *tree; 1056d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10575f39d397SChris Mason extent_invalidatepage(tree, page, offset); 10585f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 10599ad6b7bcSChris Mason if (PagePrivate(page)) { 1060efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 1061efe120a0SFrank Holton "page private not zero on page %llu", 1062efe120a0SFrank Holton (unsigned long long)page_offset(page)); 10639ad6b7bcSChris Mason ClearPagePrivate(page); 10649ad6b7bcSChris Mason set_page_private(page, 0); 106509cbfeafSKirill A. Shutemov put_page(page); 10669ad6b7bcSChris Mason } 1067d98237b3SChris Mason } 1068d98237b3SChris Mason 10690b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10700b32f4bbSJosef Bacik { 1071bb146eb2SJosef Bacik #ifdef DEBUG 10720b32f4bbSJosef Bacik struct extent_buffer *eb; 10730b32f4bbSJosef Bacik 10740b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10750b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10760b32f4bbSJosef Bacik BUG_ON(!eb); 10770b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10780b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10790b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1080bb146eb2SJosef Bacik #endif 10810b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10820b32f4bbSJosef Bacik } 10830b32f4bbSJosef Bacik 10847f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1085d98237b3SChris Mason .readpage = btree_readpage, 10860da5468fSChris Mason .writepages = btree_writepages, 10875f39d397SChris Mason .releasepage = btree_releasepage, 10885f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10895a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1090784b4e29SChris Mason .migratepage = btree_migratepage, 10915a92bc88SChris Mason #endif 10920b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1093d98237b3SChris Mason }; 1094123abc88SChris Mason 1095d3e46feaSDavid Sterba void readahead_tree_block(struct btrfs_root *root, u64 bytenr) 1096090d1875SChris Mason { 10975f39d397SChris Mason struct extent_buffer *buf = NULL; 10985f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1099090d1875SChris Mason 1100a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1101c871b0f2SLiu Bo if (IS_ERR(buf)) 11026197d86eSDavid Sterba return; 1103d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1104bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 11055f39d397SChris Mason free_extent_buffer(buf); 1106090d1875SChris Mason } 1107090d1875SChris Mason 1108c0dcaa4dSDavid Sterba int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, 1109ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1110ab0fff03SArne Jansen { 1111ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1112ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1113ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1114ab0fff03SArne Jansen int ret; 1115ab0fff03SArne Jansen 1116a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1117c871b0f2SLiu Bo if (IS_ERR(buf)) 1118ab0fff03SArne Jansen return 0; 1119ab0fff03SArne Jansen 1120ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1121ab0fff03SArne Jansen 1122ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1123ab0fff03SArne Jansen btree_get_extent, mirror_num); 1124ab0fff03SArne Jansen if (ret) { 1125ab0fff03SArne Jansen free_extent_buffer(buf); 1126ab0fff03SArne Jansen return ret; 1127ab0fff03SArne Jansen } 1128ab0fff03SArne Jansen 1129ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1130ab0fff03SArne Jansen free_extent_buffer(buf); 1131ab0fff03SArne Jansen return -EIO; 11320b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1133ab0fff03SArne Jansen *eb = buf; 1134ab0fff03SArne Jansen } else { 1135ab0fff03SArne Jansen free_extent_buffer(buf); 1136ab0fff03SArne Jansen } 1137ab0fff03SArne Jansen return 0; 1138ab0fff03SArne Jansen } 1139ab0fff03SArne Jansen 114001d58472SDaniel Dressler struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, 11410308af44SDavid Sterba u64 bytenr) 11420999df54SChris Mason { 114301d58472SDaniel Dressler return find_extent_buffer(fs_info, bytenr); 11440999df54SChris Mason } 11450999df54SChris Mason 11460999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 1147a83fffb7SDavid Sterba u64 bytenr) 11480999df54SChris Mason { 1149fccb84c9SDavid Sterba if (btrfs_test_is_dummy_root(root)) 1150b9ef22deSFeifei Xu return alloc_test_extent_buffer(root->fs_info, bytenr, 1151b9ef22deSFeifei Xu root->nodesize); 1152ce3e6984SDavid Sterba return alloc_extent_buffer(root->fs_info, bytenr); 11530999df54SChris Mason } 11540999df54SChris Mason 11550999df54SChris Mason 1156e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1157e02119d5SChris Mason { 1158727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11598aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1160e02119d5SChris Mason } 1161e02119d5SChris Mason 1162e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1163e02119d5SChris Mason { 1164727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11658aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1166e02119d5SChris Mason } 1167e02119d5SChris Mason 1168db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1169ce86cd59SDavid Sterba u64 parent_transid) 1170e20d96d6SChris Mason { 11715f39d397SChris Mason struct extent_buffer *buf = NULL; 117219c00ddcSChris Mason int ret; 117319c00ddcSChris Mason 1174a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1175c871b0f2SLiu Bo if (IS_ERR(buf)) 1176c871b0f2SLiu Bo return buf; 1177e4204dedSChris Mason 1178ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11790f0fe8f7SFilipe David Borba Manana if (ret) { 11800f0fe8f7SFilipe David Borba Manana free_extent_buffer(buf); 118164c043deSLiu Bo return ERR_PTR(ret); 11820f0fe8f7SFilipe David Borba Manana } 11835f39d397SChris Mason return buf; 1184ce9adaa5SChris Mason 1185eb60ceacSChris Mason } 1186eb60ceacSChris Mason 118701d58472SDaniel Dressler void clean_tree_block(struct btrfs_trans_handle *trans, 118801d58472SDaniel Dressler struct btrfs_fs_info *fs_info, 11895f39d397SChris Mason struct extent_buffer *buf) 1190ed2ff2cbSChris Mason { 119155c69072SChris Mason if (btrfs_header_generation(buf) == 1192e2d84521SMiao Xie fs_info->running_transaction->transid) { 1193b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1194b4ce94deSChris Mason 1195b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1196e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1197e2d84521SMiao Xie -buf->len, 1198e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1199b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1200b9473439SChris Mason btrfs_set_lock_blocking(buf); 12010b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1202925baeddSChris Mason } 12035f39d397SChris Mason } 1204ed7b63ebSJosef Bacik } 12055f39d397SChris Mason 12068257b2dcSMiao Xie static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) 12078257b2dcSMiao Xie { 12088257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 12098257b2dcSMiao Xie int ret; 12108257b2dcSMiao Xie 12118257b2dcSMiao Xie writers = kmalloc(sizeof(*writers), GFP_NOFS); 12128257b2dcSMiao Xie if (!writers) 12138257b2dcSMiao Xie return ERR_PTR(-ENOMEM); 12148257b2dcSMiao Xie 1215908c7f19STejun Heo ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); 12168257b2dcSMiao Xie if (ret < 0) { 12178257b2dcSMiao Xie kfree(writers); 12188257b2dcSMiao Xie return ERR_PTR(ret); 12198257b2dcSMiao Xie } 12208257b2dcSMiao Xie 12218257b2dcSMiao Xie init_waitqueue_head(&writers->wait); 12228257b2dcSMiao Xie return writers; 12238257b2dcSMiao Xie } 12248257b2dcSMiao Xie 12258257b2dcSMiao Xie static void 12268257b2dcSMiao Xie btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) 12278257b2dcSMiao Xie { 12288257b2dcSMiao Xie percpu_counter_destroy(&writers->counter); 12298257b2dcSMiao Xie kfree(writers); 12308257b2dcSMiao Xie } 12318257b2dcSMiao Xie 1232707e8a07SDavid Sterba static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize, 1233707e8a07SDavid Sterba struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1234e20d96d6SChris Mason u64 objectid) 1235d97e63b6SChris Mason { 1236cfaa7295SChris Mason root->node = NULL; 1237a28ec197SChris Mason root->commit_root = NULL; 1238db94535dSChris Mason root->sectorsize = sectorsize; 1239db94535dSChris Mason root->nodesize = nodesize; 124087ee04ebSChris Mason root->stripesize = stripesize; 124127cdeb70SMiao Xie root->state = 0; 1242d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 12430b86a832SChris Mason 12440f7d52f4SChris Mason root->objectid = objectid; 12450f7d52f4SChris Mason root->last_trans = 0; 124613a8a7c8SYan, Zheng root->highest_objectid = 0; 1247eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1248199c2a9cSMiao Xie root->nr_ordered_extents = 0; 124958176a96SJosef Bacik root->name = NULL; 12506bef4d31SEric Paris root->inode_tree = RB_ROOT; 125116cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1252f0486c68SYan, Zheng root->block_rsv = NULL; 1253d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 12540b86a832SChris Mason 12550b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 12565d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1257eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1258eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1259199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1260199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 12612ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 12622ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1263d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 12645d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1265eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1266199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1267f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 12682ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 12692ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1270a2135011SChris Mason mutex_init(&root->objectid_mutex); 1271e02119d5SChris Mason mutex_init(&root->log_mutex); 127231f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1273573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 12747237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 12757237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 12767237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 12778b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 12788b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 12797237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 12807237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 12817237f183SYan Zheng atomic_set(&root->log_writers, 0); 12822ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 12838a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 1284b0feb9d9SMiao Xie atomic_set(&root->refs, 1); 12858257b2dcSMiao Xie atomic_set(&root->will_be_snapshoted, 0); 128655eeaf05SQu Wenruo atomic_set(&root->qgroup_meta_rsv, 0); 12877237f183SYan Zheng root->log_transid = 0; 1288d1433debSMiao Xie root->log_transid_committed = -1; 1289257c62e1SChris Mason root->last_log_commit = 0; 129006ea65a3SJosef Bacik if (fs_info) 1291d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1292f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1293017e5369SChris Mason 12943768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12953768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12966702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 129706ea65a3SJosef Bacik if (fs_info) 12983f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 129906ea65a3SJosef Bacik else 130006ea65a3SJosef Bacik root->defrag_trans_start = 0; 13014d775673SChris Mason root->root_key.objectid = objectid; 13020ee5dc67SAl Viro root->anon_dev = 0; 13038ea05e3aSAlexander Block 13045f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 13053768f368SChris Mason } 13063768f368SChris Mason 130774e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 130874e4d827SDavid Sterba gfp_t flags) 13096f07e42eSAl Viro { 131074e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 13116f07e42eSAl Viro if (root) 13126f07e42eSAl Viro root->fs_info = fs_info; 13136f07e42eSAl Viro return root; 13146f07e42eSAl Viro } 13156f07e42eSAl Viro 131606ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 131706ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 1318b9ef22deSFeifei Xu struct btrfs_root *btrfs_alloc_dummy_root(u32 sectorsize, u32 nodesize) 131906ea65a3SJosef Bacik { 132006ea65a3SJosef Bacik struct btrfs_root *root; 132106ea65a3SJosef Bacik 132274e4d827SDavid Sterba root = btrfs_alloc_root(NULL, GFP_KERNEL); 132306ea65a3SJosef Bacik if (!root) 132406ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1325b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 1326ef9f2db3SFeifei Xu __setup_root(nodesize, sectorsize, sectorsize, root, NULL, 1327ef9f2db3SFeifei Xu BTRFS_ROOT_TREE_OBJECTID); 132827cdeb70SMiao Xie set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state); 1329faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 133006ea65a3SJosef Bacik 133106ea65a3SJosef Bacik return root; 133206ea65a3SJosef Bacik } 133306ea65a3SJosef Bacik #endif 133406ea65a3SJosef Bacik 133520897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 133620897f5cSArne Jansen struct btrfs_fs_info *fs_info, 133720897f5cSArne Jansen u64 objectid) 133820897f5cSArne Jansen { 133920897f5cSArne Jansen struct extent_buffer *leaf; 134020897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 134120897f5cSArne Jansen struct btrfs_root *root; 134220897f5cSArne Jansen struct btrfs_key key; 134320897f5cSArne Jansen int ret = 0; 13446463fe58SStefan Behrens uuid_le uuid; 134520897f5cSArne Jansen 134674e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_KERNEL); 134720897f5cSArne Jansen if (!root) 134820897f5cSArne Jansen return ERR_PTR(-ENOMEM); 134920897f5cSArne Jansen 1350707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1351707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, objectid); 135220897f5cSArne Jansen root->root_key.objectid = objectid; 135320897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 135420897f5cSArne Jansen root->root_key.offset = 0; 135520897f5cSArne Jansen 13564d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 135720897f5cSArne Jansen if (IS_ERR(leaf)) { 135820897f5cSArne Jansen ret = PTR_ERR(leaf); 13591dd05682STsutomu Itoh leaf = NULL; 136020897f5cSArne Jansen goto fail; 136120897f5cSArne Jansen } 136220897f5cSArne Jansen 136320897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 136420897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 136520897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 136620897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 136720897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 136820897f5cSArne Jansen root->node = leaf; 136920897f5cSArne Jansen 13700a4e5586SRoss Kirk write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), 137120897f5cSArne Jansen BTRFS_FSID_SIZE); 137220897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 1373b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(leaf), 137420897f5cSArne Jansen BTRFS_UUID_SIZE); 137520897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 137620897f5cSArne Jansen 137720897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 137827cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 137920897f5cSArne Jansen 138020897f5cSArne Jansen root->root_item.flags = 0; 138120897f5cSArne Jansen root->root_item.byte_limit = 0; 138220897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 138320897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 138420897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 138520897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 138620897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 138720897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 138820897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 13896463fe58SStefan Behrens uuid_le_gen(&uuid); 13906463fe58SStefan Behrens memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); 139120897f5cSArne Jansen root->root_item.drop_level = 0; 139220897f5cSArne Jansen 139320897f5cSArne Jansen key.objectid = objectid; 139420897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 139520897f5cSArne Jansen key.offset = 0; 139620897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 139720897f5cSArne Jansen if (ret) 139820897f5cSArne Jansen goto fail; 139920897f5cSArne Jansen 140020897f5cSArne Jansen btrfs_tree_unlock(leaf); 140120897f5cSArne Jansen 140220897f5cSArne Jansen return root; 14031dd05682STsutomu Itoh 14041dd05682STsutomu Itoh fail: 14051dd05682STsutomu Itoh if (leaf) { 14061dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 140759885b39STsutomu Itoh free_extent_buffer(root->commit_root); 14081dd05682STsutomu Itoh free_extent_buffer(leaf); 14091dd05682STsutomu Itoh } 14101dd05682STsutomu Itoh kfree(root); 14111dd05682STsutomu Itoh 14121dd05682STsutomu Itoh return ERR_PTR(ret); 141320897f5cSArne Jansen } 141420897f5cSArne Jansen 14157237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1416e02119d5SChris Mason struct btrfs_fs_info *fs_info) 14170f7d52f4SChris Mason { 14180f7d52f4SChris Mason struct btrfs_root *root; 14190f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 14207237f183SYan Zheng struct extent_buffer *leaf; 1421e02119d5SChris Mason 142274e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1423e02119d5SChris Mason if (!root) 14247237f183SYan Zheng return ERR_PTR(-ENOMEM); 1425e02119d5SChris Mason 1426707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1427707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, 1428707e8a07SDavid Sterba BTRFS_TREE_LOG_OBJECTID); 1429e02119d5SChris Mason 1430e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1431e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1432e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 143327cdeb70SMiao Xie 14347237f183SYan Zheng /* 143527cdeb70SMiao Xie * DON'T set REF_COWS for log trees 143627cdeb70SMiao Xie * 14377237f183SYan Zheng * log trees do not get reference counted because they go away 14387237f183SYan Zheng * before a real commit is actually done. They do store pointers 14397237f183SYan Zheng * to file data extents, and those reference counts still get 14407237f183SYan Zheng * updated (along with back refs to the log tree). 14417237f183SYan Zheng */ 1442e02119d5SChris Mason 14434d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 14444d75f8a9SDavid Sterba NULL, 0, 0, 0); 14457237f183SYan Zheng if (IS_ERR(leaf)) { 14467237f183SYan Zheng kfree(root); 14477237f183SYan Zheng return ERR_CAST(leaf); 14487237f183SYan Zheng } 1449e02119d5SChris Mason 14505d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 14515d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 14525d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 14535d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 14545d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 14557237f183SYan Zheng root->node = leaf; 1456e02119d5SChris Mason 1457e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 14580a4e5586SRoss Kirk btrfs_header_fsid(), BTRFS_FSID_SIZE); 1459e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1460e02119d5SChris Mason btrfs_tree_unlock(root->node); 14617237f183SYan Zheng return root; 14627237f183SYan Zheng } 14637237f183SYan Zheng 14647237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 14657237f183SYan Zheng struct btrfs_fs_info *fs_info) 14667237f183SYan Zheng { 14677237f183SYan Zheng struct btrfs_root *log_root; 14687237f183SYan Zheng 14697237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 14707237f183SYan Zheng if (IS_ERR(log_root)) 14717237f183SYan Zheng return PTR_ERR(log_root); 14727237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 14737237f183SYan Zheng fs_info->log_root_tree = log_root; 14747237f183SYan Zheng return 0; 14757237f183SYan Zheng } 14767237f183SYan Zheng 14777237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 14787237f183SYan Zheng struct btrfs_root *root) 14797237f183SYan Zheng { 14807237f183SYan Zheng struct btrfs_root *log_root; 14817237f183SYan Zheng struct btrfs_inode_item *inode_item; 14827237f183SYan Zheng 14837237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 14847237f183SYan Zheng if (IS_ERR(log_root)) 14857237f183SYan Zheng return PTR_ERR(log_root); 14867237f183SYan Zheng 14877237f183SYan Zheng log_root->last_trans = trans->transid; 14887237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14897237f183SYan Zheng 14907237f183SYan Zheng inode_item = &log_root->root_item.inode; 14913cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 14923cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 14933cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1494707e8a07SDavid Sterba btrfs_set_stack_inode_nbytes(inode_item, root->nodesize); 14953cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 14967237f183SYan Zheng 14975d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14987237f183SYan Zheng 14997237f183SYan Zheng WARN_ON(root->log_root); 15007237f183SYan Zheng root->log_root = log_root; 15017237f183SYan Zheng root->log_transid = 0; 1502d1433debSMiao Xie root->log_transid_committed = -1; 1503257c62e1SChris Mason root->last_log_commit = 0; 1504e02119d5SChris Mason return 0; 1505e02119d5SChris Mason } 1506e02119d5SChris Mason 150735a3621bSStefan Behrens static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1508cb517eabSMiao Xie struct btrfs_key *key) 1509e02119d5SChris Mason { 1510e02119d5SChris Mason struct btrfs_root *root; 1511e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 15120f7d52f4SChris Mason struct btrfs_path *path; 151384234f3aSYan Zheng u64 generation; 1514cb517eabSMiao Xie int ret; 1515cb517eabSMiao Xie 1516cb517eabSMiao Xie path = btrfs_alloc_path(); 1517cb517eabSMiao Xie if (!path) 1518cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 15190f7d52f4SChris Mason 152074e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1521cb517eabSMiao Xie if (!root) { 1522cb517eabSMiao Xie ret = -ENOMEM; 1523cb517eabSMiao Xie goto alloc_fail; 15240f7d52f4SChris Mason } 15250f7d52f4SChris Mason 1526707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1527707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, key->objectid); 15280f7d52f4SChris Mason 1529cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1530cb517eabSMiao Xie &root->root_item, &root->root_key); 15310f7d52f4SChris Mason if (ret) { 153213a8a7c8SYan, Zheng if (ret > 0) 153313a8a7c8SYan, Zheng ret = -ENOENT; 1534cb517eabSMiao Xie goto find_fail; 15350f7d52f4SChris Mason } 153613a8a7c8SYan, Zheng 153784234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1538db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 1539ce86cd59SDavid Sterba generation); 154064c043deSLiu Bo if (IS_ERR(root->node)) { 154164c043deSLiu Bo ret = PTR_ERR(root->node); 1542cb517eabSMiao Xie goto find_fail; 1543cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1544cb517eabSMiao Xie ret = -EIO; 154564c043deSLiu Bo free_extent_buffer(root->node); 154664c043deSLiu Bo goto find_fail; 1547416bc658SJosef Bacik } 15485d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 154913a8a7c8SYan, Zheng out: 1550cb517eabSMiao Xie btrfs_free_path(path); 1551cb517eabSMiao Xie return root; 1552cb517eabSMiao Xie 1553cb517eabSMiao Xie find_fail: 1554cb517eabSMiao Xie kfree(root); 1555cb517eabSMiao Xie alloc_fail: 1556cb517eabSMiao Xie root = ERR_PTR(ret); 1557cb517eabSMiao Xie goto out; 1558cb517eabSMiao Xie } 1559cb517eabSMiao Xie 1560cb517eabSMiao Xie struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, 1561cb517eabSMiao Xie struct btrfs_key *location) 1562cb517eabSMiao Xie { 1563cb517eabSMiao Xie struct btrfs_root *root; 1564cb517eabSMiao Xie 1565cb517eabSMiao Xie root = btrfs_read_tree_root(tree_root, location); 1566cb517eabSMiao Xie if (IS_ERR(root)) 1567cb517eabSMiao Xie return root; 1568cb517eabSMiao Xie 1569cb517eabSMiao Xie if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { 157027cdeb70SMiao Xie set_bit(BTRFS_ROOT_REF_COWS, &root->state); 157108fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 157208fe4db1SLi Zefan } 157313a8a7c8SYan, Zheng 15745eda7b5eSChris Mason return root; 15755eda7b5eSChris Mason } 15765eda7b5eSChris Mason 1577cb517eabSMiao Xie int btrfs_init_fs_root(struct btrfs_root *root) 1578cb517eabSMiao Xie { 1579cb517eabSMiao Xie int ret; 15808257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 1581cb517eabSMiao Xie 1582cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1583cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1584cb517eabSMiao Xie GFP_NOFS); 1585cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1586cb517eabSMiao Xie ret = -ENOMEM; 1587cb517eabSMiao Xie goto fail; 1588cb517eabSMiao Xie } 1589cb517eabSMiao Xie 15908257b2dcSMiao Xie writers = btrfs_alloc_subvolume_writers(); 15918257b2dcSMiao Xie if (IS_ERR(writers)) { 15928257b2dcSMiao Xie ret = PTR_ERR(writers); 15938257b2dcSMiao Xie goto fail; 15948257b2dcSMiao Xie } 15958257b2dcSMiao Xie root->subv_writers = writers; 15968257b2dcSMiao Xie 1597cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 159857cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 159957cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1600cb517eabSMiao Xie 1601cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1602cb517eabSMiao Xie if (ret) 1603876d2cf1SLiu Bo goto fail; 1604f32e48e9SChandan Rajendra 1605f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1606f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1607f32e48e9SChandan Rajendra &root->highest_objectid); 1608f32e48e9SChandan Rajendra if (ret) { 1609f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1610876d2cf1SLiu Bo goto fail; 1611f32e48e9SChandan Rajendra } 1612f32e48e9SChandan Rajendra 1613f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1614f32e48e9SChandan Rajendra 1615f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1616f32e48e9SChandan Rajendra 1617cb517eabSMiao Xie return 0; 1618cb517eabSMiao Xie fail: 1619876d2cf1SLiu Bo /* the caller is responsible to call free_fs_root */ 1620cb517eabSMiao Xie return ret; 1621cb517eabSMiao Xie } 1622cb517eabSMiao Xie 1623171170c1SSergei Trofimovich static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1624cb517eabSMiao Xie u64 root_id) 1625cb517eabSMiao Xie { 1626cb517eabSMiao Xie struct btrfs_root *root; 1627cb517eabSMiao Xie 1628cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1629cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1630cb517eabSMiao Xie (unsigned long)root_id); 1631cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1632cb517eabSMiao Xie return root; 1633cb517eabSMiao Xie } 1634cb517eabSMiao Xie 1635cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1636cb517eabSMiao Xie struct btrfs_root *root) 1637cb517eabSMiao Xie { 1638cb517eabSMiao Xie int ret; 1639cb517eabSMiao Xie 1640e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1641cb517eabSMiao Xie if (ret) 1642cb517eabSMiao Xie return ret; 1643cb517eabSMiao Xie 1644cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1645cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1646cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1647cb517eabSMiao Xie root); 1648cb517eabSMiao Xie if (ret == 0) 164927cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1650cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1651cb517eabSMiao Xie radix_tree_preload_end(); 1652cb517eabSMiao Xie 1653cb517eabSMiao Xie return ret; 1654cb517eabSMiao Xie } 1655cb517eabSMiao Xie 1656c00869f1SMiao Xie struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 1657c00869f1SMiao Xie struct btrfs_key *location, 1658c00869f1SMiao Xie bool check_ref) 16595eda7b5eSChris Mason { 16605eda7b5eSChris Mason struct btrfs_root *root; 1661381cf658SDavid Sterba struct btrfs_path *path; 16621d4c08e0SDavid Sterba struct btrfs_key key; 16635eda7b5eSChris Mason int ret; 16645eda7b5eSChris Mason 1665edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1666edbd8d4eSChris Mason return fs_info->tree_root; 1667edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1668edbd8d4eSChris Mason return fs_info->extent_root; 16698f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 16708f18cf13SChris Mason return fs_info->chunk_root; 16718f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 16728f18cf13SChris Mason return fs_info->dev_root; 16730403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 16740403e47eSYan Zheng return fs_info->csum_root; 1675bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1676bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1677bcef60f2SArne Jansen ERR_PTR(-ENOENT); 1678f7a81ea4SStefan Behrens if (location->objectid == BTRFS_UUID_TREE_OBJECTID) 1679f7a81ea4SStefan Behrens return fs_info->uuid_root ? fs_info->uuid_root : 1680f7a81ea4SStefan Behrens ERR_PTR(-ENOENT); 168170f6d82eSOmar Sandoval if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 168270f6d82eSOmar Sandoval return fs_info->free_space_root ? fs_info->free_space_root : 168370f6d82eSOmar Sandoval ERR_PTR(-ENOENT); 16844df27c4dSYan, Zheng again: 1685cb517eabSMiao Xie root = btrfs_lookup_fs_root(fs_info, location->objectid); 168648475471SStefan Behrens if (root) { 1687c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) 168848475471SStefan Behrens return ERR_PTR(-ENOENT); 16895eda7b5eSChris Mason return root; 169048475471SStefan Behrens } 16915eda7b5eSChris Mason 1692cb517eabSMiao Xie root = btrfs_read_fs_root(fs_info->tree_root, location); 16935eda7b5eSChris Mason if (IS_ERR(root)) 16945eda7b5eSChris Mason return root; 16953394e160SChris Mason 1696c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1697d68fc57bSYan, Zheng ret = -ENOENT; 1698d68fc57bSYan, Zheng goto fail; 1699d68fc57bSYan, Zheng } 1700d68fc57bSYan, Zheng 1701cb517eabSMiao Xie ret = btrfs_init_fs_root(root); 1702cb517eabSMiao Xie if (ret) 1703cb517eabSMiao Xie goto fail; 1704cb517eabSMiao Xie 1705381cf658SDavid Sterba path = btrfs_alloc_path(); 1706381cf658SDavid Sterba if (!path) { 1707381cf658SDavid Sterba ret = -ENOMEM; 1708381cf658SDavid Sterba goto fail; 1709381cf658SDavid Sterba } 17101d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 17111d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 17121d4c08e0SDavid Sterba key.offset = location->objectid; 17131d4c08e0SDavid Sterba 17141d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1715381cf658SDavid Sterba btrfs_free_path(path); 1716d68fc57bSYan, Zheng if (ret < 0) 1717d68fc57bSYan, Zheng goto fail; 1718d68fc57bSYan, Zheng if (ret == 0) 171927cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1720d68fc57bSYan, Zheng 1721cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 17220f7d52f4SChris Mason if (ret) { 17234df27c4dSYan, Zheng if (ret == -EEXIST) { 17244df27c4dSYan, Zheng free_fs_root(root); 17254df27c4dSYan, Zheng goto again; 17260f7d52f4SChris Mason } 17274df27c4dSYan, Zheng goto fail; 17284df27c4dSYan, Zheng } 1729edbd8d4eSChris Mason return root; 17304df27c4dSYan, Zheng fail: 17314df27c4dSYan, Zheng free_fs_root(root); 17324df27c4dSYan, Zheng return ERR_PTR(ret); 1733edbd8d4eSChris Mason } 1734edbd8d4eSChris Mason 173504160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 173604160088SChris Mason { 173704160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 173804160088SChris Mason int ret = 0; 173904160088SChris Mason struct btrfs_device *device; 174004160088SChris Mason struct backing_dev_info *bdi; 1741b7967db7SChris Mason 17421f78160cSXiao Guangrong rcu_read_lock(); 17431f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1744dfe25020SChris Mason if (!device->bdev) 1745dfe25020SChris Mason continue; 174604160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 1747ff9ea323STejun Heo if (bdi_congested(bdi, bdi_bits)) { 174804160088SChris Mason ret = 1; 174904160088SChris Mason break; 175004160088SChris Mason } 175104160088SChris Mason } 17521f78160cSXiao Guangrong rcu_read_unlock(); 175304160088SChris Mason return ret; 175404160088SChris Mason } 175504160088SChris Mason 175604160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 175704160088SChris Mason { 1758ad081f14SJens Axboe int err; 1759ad081f14SJens Axboe 1760b4caecd4SChristoph Hellwig err = bdi_setup_and_register(bdi, "btrfs"); 1761ad081f14SJens Axboe if (err) 1762ad081f14SJens Axboe return err; 1763ad081f14SJens Axboe 176409cbfeafSKirill A. Shutemov bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; 176504160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 176604160088SChris Mason bdi->congested_data = info; 1767da2f0f74SChris Mason bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 176804160088SChris Mason return 0; 176904160088SChris Mason } 177004160088SChris Mason 17718b712842SChris Mason /* 17728b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 17738b712842SChris Mason * functions. This is where read checksum verification actually happens 17748b712842SChris Mason */ 17758b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1776ce9adaa5SChris Mason { 1777ce9adaa5SChris Mason struct bio *bio; 177897eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1779ce9adaa5SChris Mason 178097eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1781ce9adaa5SChris Mason bio = end_io_wq->bio; 17828b712842SChris Mason 17834246a0b6SChristoph Hellwig bio->bi_error = end_io_wq->error; 1784ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1785ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 178697eb6b69SDavid Sterba kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 17874246a0b6SChristoph Hellwig bio_endio(bio); 1788ce9adaa5SChris Mason } 178944b8bd7eSChris Mason 1790a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1791a74a4b97SChris Mason { 1792a74a4b97SChris Mason struct btrfs_root *root = arg; 1793d0278245SMiao Xie int again; 1794da288d28SFilipe Manana struct btrfs_trans_handle *trans; 1795a74a4b97SChris Mason 1796a74a4b97SChris Mason do { 1797d0278245SMiao Xie again = 0; 17989d1a2a3aSDavid Sterba 1799d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 1800babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) 1801d0278245SMiao Xie goto sleep; 1802d0278245SMiao Xie 180390c711abSZygo Blaxell /* 180490c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 180590c711abSZygo Blaxell * before we have finished mounting the filesystem. 180690c711abSZygo Blaxell */ 180790c711abSZygo Blaxell if (!root->fs_info->open) 180890c711abSZygo Blaxell goto sleep; 180990c711abSZygo Blaxell 1810d0278245SMiao Xie if (!mutex_trylock(&root->fs_info->cleaner_mutex)) 1811d0278245SMiao Xie goto sleep; 1812d0278245SMiao Xie 1813dc7f370cSMiao Xie /* 1814dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1815dc7f370cSMiao Xie * during the above check and trylock. 1816dc7f370cSMiao Xie */ 1817babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) { 1818dc7f370cSMiao Xie mutex_unlock(&root->fs_info->cleaner_mutex); 1819dc7f370cSMiao Xie goto sleep; 1820dc7f370cSMiao Xie } 1821dc7f370cSMiao Xie 1822c2d6cb16SFilipe Manana mutex_lock(&root->fs_info->cleaner_delayed_iput_mutex); 182324bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1824c2d6cb16SFilipe Manana mutex_unlock(&root->fs_info->cleaner_delayed_iput_mutex); 1825c2d6cb16SFilipe Manana 18269d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 1827a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 1828a74a4b97SChris Mason 1829d0278245SMiao Xie /* 183005323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 183105323cd1SMiao Xie * needn't do anything special here. 1832d0278245SMiao Xie */ 1833d0278245SMiao Xie btrfs_run_defrag_inodes(root->fs_info); 183467c5e7d4SFilipe Manana 183567c5e7d4SFilipe Manana /* 183667c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 183767c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 183867c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 183967c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 184067c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 184167c5e7d4SFilipe Manana * unused block groups. 184267c5e7d4SFilipe Manana */ 184367c5e7d4SFilipe Manana btrfs_delete_unused_bgs(root->fs_info); 1844d0278245SMiao Xie sleep: 1845838fe188SJiri Kosina if (!again) { 1846a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 18478929ecfaSYan, Zheng if (!kthread_should_stop()) 1848a74a4b97SChris Mason schedule(); 1849a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1850a74a4b97SChris Mason } 1851a74a4b97SChris Mason } while (!kthread_should_stop()); 1852da288d28SFilipe Manana 1853da288d28SFilipe Manana /* 1854da288d28SFilipe Manana * Transaction kthread is stopped before us and wakes us up. 1855da288d28SFilipe Manana * However we might have started a new transaction and COWed some 1856da288d28SFilipe Manana * tree blocks when deleting unused block groups for example. So 1857da288d28SFilipe Manana * make sure we commit the transaction we started to have a clean 1858da288d28SFilipe Manana * shutdown when evicting the btree inode - if it has dirty pages 1859da288d28SFilipe Manana * when we do the final iput() on it, eviction will trigger a 1860da288d28SFilipe Manana * writeback for it which will fail with null pointer dereferences 1861da288d28SFilipe Manana * since work queues and other resources were already released and 1862da288d28SFilipe Manana * destroyed by the time the iput/eviction/writeback is made. 1863da288d28SFilipe Manana */ 1864da288d28SFilipe Manana trans = btrfs_attach_transaction(root); 1865da288d28SFilipe Manana if (IS_ERR(trans)) { 1866da288d28SFilipe Manana if (PTR_ERR(trans) != -ENOENT) 1867da288d28SFilipe Manana btrfs_err(root->fs_info, 1868da288d28SFilipe Manana "cleaner transaction attach returned %ld", 1869da288d28SFilipe Manana PTR_ERR(trans)); 1870da288d28SFilipe Manana } else { 1871da288d28SFilipe Manana int ret; 1872da288d28SFilipe Manana 1873da288d28SFilipe Manana ret = btrfs_commit_transaction(trans, root); 1874da288d28SFilipe Manana if (ret) 1875da288d28SFilipe Manana btrfs_err(root->fs_info, 1876da288d28SFilipe Manana "cleaner open transaction commit returned %d", 1877da288d28SFilipe Manana ret); 1878da288d28SFilipe Manana } 1879da288d28SFilipe Manana 1880a74a4b97SChris Mason return 0; 1881a74a4b97SChris Mason } 1882a74a4b97SChris Mason 1883a74a4b97SChris Mason static int transaction_kthread(void *arg) 1884a74a4b97SChris Mason { 1885a74a4b97SChris Mason struct btrfs_root *root = arg; 1886a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1887a74a4b97SChris Mason struct btrfs_transaction *cur; 18888929ecfaSYan, Zheng u64 transid; 1889a74a4b97SChris Mason unsigned long now; 1890a74a4b97SChris Mason unsigned long delay; 1891914b2007SJan Kara bool cannot_commit; 1892a74a4b97SChris Mason 1893a74a4b97SChris Mason do { 1894914b2007SJan Kara cannot_commit = false; 18958b87dc17SDavid Sterba delay = HZ * root->fs_info->commit_interval; 1896a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1897a74a4b97SChris Mason 1898a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1899a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1900a74a4b97SChris Mason if (!cur) { 1901a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1902a74a4b97SChris Mason goto sleep; 1903a74a4b97SChris Mason } 190431153d81SYan Zheng 1905a74a4b97SChris Mason now = get_seconds(); 19064a9d8bdeSMiao Xie if (cur->state < TRANS_STATE_BLOCKED && 19078b87dc17SDavid Sterba (now < cur->start_time || 19088b87dc17SDavid Sterba now - cur->start_time < root->fs_info->commit_interval)) { 1909a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1910a74a4b97SChris Mason delay = HZ * 5; 1911a74a4b97SChris Mason goto sleep; 1912a74a4b97SChris Mason } 19138929ecfaSYan, Zheng transid = cur->transid; 1914a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 191556bec294SChris Mason 191679787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1917354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1918914b2007SJan Kara if (IS_ERR(trans)) { 1919354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1920914b2007SJan Kara cannot_commit = true; 192179787eaaSJeff Mahoney goto sleep; 1922914b2007SJan Kara } 19238929ecfaSYan, Zheng if (transid == trans->transid) { 192479787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 19258929ecfaSYan, Zheng } else { 19268929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 19278929ecfaSYan, Zheng } 1928a74a4b97SChris Mason sleep: 1929a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1930a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1931a74a4b97SChris Mason 19324e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 19334e121c06SJosef Bacik &root->fs_info->fs_state))) 19344e121c06SJosef Bacik btrfs_cleanup_transaction(root); 1935a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 19368929ecfaSYan, Zheng if (!kthread_should_stop() && 1937914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1938914b2007SJan Kara cannot_commit)) 1939a74a4b97SChris Mason schedule_timeout(delay); 1940a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1941a74a4b97SChris Mason } while (!kthread_should_stop()); 1942a74a4b97SChris Mason return 0; 1943a74a4b97SChris Mason } 1944a74a4b97SChris Mason 1945af31f5e5SChris Mason /* 1946af31f5e5SChris Mason * this will find the highest generation in the array of 1947af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1948af31f5e5SChris Mason * or -1 if we can't find anything. 1949af31f5e5SChris Mason * 1950af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1951af31f5e5SChris Mason * generation of the latest root in the array with the generation 1952af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1953af31f5e5SChris Mason */ 1954af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1955af31f5e5SChris Mason { 1956af31f5e5SChris Mason u64 cur; 1957af31f5e5SChris Mason int newest_index = -1; 1958af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1959af31f5e5SChris Mason int i; 1960af31f5e5SChris Mason 1961af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1962af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1963af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1964af31f5e5SChris Mason if (cur == newest_gen) 1965af31f5e5SChris Mason newest_index = i; 1966af31f5e5SChris Mason } 1967af31f5e5SChris Mason 1968af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1969af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1970af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1971af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1972af31f5e5SChris Mason if (cur == newest_gen) 1973af31f5e5SChris Mason newest_index = 0; 1974af31f5e5SChris Mason } 1975af31f5e5SChris Mason return newest_index; 1976af31f5e5SChris Mason } 1977af31f5e5SChris Mason 1978af31f5e5SChris Mason 1979af31f5e5SChris Mason /* 1980af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1981af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1982af31f5e5SChris Mason * field in the fs_info struct 1983af31f5e5SChris Mason */ 1984af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1985af31f5e5SChris Mason u64 newest_gen) 1986af31f5e5SChris Mason { 1987af31f5e5SChris Mason int newest_index = -1; 1988af31f5e5SChris Mason 1989af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1990af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1991af31f5e5SChris Mason if (newest_index == -1) { 1992af31f5e5SChris Mason info->backup_root_index = 0; 1993af31f5e5SChris Mason } else { 1994af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1995af31f5e5SChris Mason } 1996af31f5e5SChris Mason } 1997af31f5e5SChris Mason 1998af31f5e5SChris Mason /* 1999af31f5e5SChris Mason * copy all the root pointers into the super backup array. 2000af31f5e5SChris Mason * this will bump the backup pointer by one when it is 2001af31f5e5SChris Mason * done 2002af31f5e5SChris Mason */ 2003af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 2004af31f5e5SChris Mason { 2005af31f5e5SChris Mason int next_backup; 2006af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2007af31f5e5SChris Mason int last_backup; 2008af31f5e5SChris Mason 2009af31f5e5SChris Mason next_backup = info->backup_root_index; 2010af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 2011af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 2012af31f5e5SChris Mason 2013af31f5e5SChris Mason /* 2014af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 2015af31f5e5SChris Mason * this happens only at umount 2016af31f5e5SChris Mason */ 2017af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 2018af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 2019af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 2020af31f5e5SChris Mason next_backup = last_backup; 2021af31f5e5SChris Mason 2022af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 2023af31f5e5SChris Mason 2024af31f5e5SChris Mason /* 2025af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 2026af31f5e5SChris Mason * regardless of which ones we use today 2027af31f5e5SChris Mason */ 2028af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 2029af31f5e5SChris Mason 2030af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 2031af31f5e5SChris Mason 2032af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 2033af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 2034af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 2035af31f5e5SChris Mason 2036af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 2037af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 2038af31f5e5SChris Mason 2039af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 2040af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 2041af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 2042af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 2043af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 2044af31f5e5SChris Mason 2045af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 2046af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 2047af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 2048af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 2049af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 2050af31f5e5SChris Mason 20517c7e82a7SChris Mason /* 20527c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 20537c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 20547c7e82a7SChris Mason */ 20557c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 20567c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 20577c7e82a7SChris Mason info->fs_root->node->start); 2058af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 2059af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 2060af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 2061af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 20627c7e82a7SChris Mason } 2063af31f5e5SChris Mason 2064af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 2065af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 2066af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 2067af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 2068af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 2069af31f5e5SChris Mason 2070af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 2071af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 2072af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 2073af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 2074af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 2075af31f5e5SChris Mason 2076af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 2077af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 2078af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 2079af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 2080af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 2081af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 2082af31f5e5SChris Mason 2083af31f5e5SChris Mason /* 2084af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 2085af31f5e5SChris Mason * for the next commit 2086af31f5e5SChris Mason */ 2087af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 2088af31f5e5SChris Mason &info->super_for_commit->super_roots, 2089af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 2090af31f5e5SChris Mason } 2091af31f5e5SChris Mason 2092af31f5e5SChris Mason /* 2093af31f5e5SChris Mason * this copies info out of the root backup array and back into 2094af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 2095af31f5e5SChris Mason * the array, so you send it the number of backups you've already 2096af31f5e5SChris Mason * tried and the last backup index you used. 2097af31f5e5SChris Mason * 2098af31f5e5SChris Mason * this returns -1 when it has tried all the backups 2099af31f5e5SChris Mason */ 2100af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 2101af31f5e5SChris Mason struct btrfs_super_block *super, 2102af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 2103af31f5e5SChris Mason { 2104af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2105af31f5e5SChris Mason int newest = *backup_index; 2106af31f5e5SChris Mason 2107af31f5e5SChris Mason if (*num_backups_tried == 0) { 2108af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 2109af31f5e5SChris Mason 2110af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 2111af31f5e5SChris Mason if (newest == -1) 2112af31f5e5SChris Mason return -1; 2113af31f5e5SChris Mason 2114af31f5e5SChris Mason *backup_index = newest; 2115af31f5e5SChris Mason *num_backups_tried = 1; 2116af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 2117af31f5e5SChris Mason /* we've tried all the backups, all done */ 2118af31f5e5SChris Mason return -1; 2119af31f5e5SChris Mason } else { 2120af31f5e5SChris Mason /* jump to the next oldest backup */ 2121af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 2122af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 2123af31f5e5SChris Mason *backup_index = newest; 2124af31f5e5SChris Mason *num_backups_tried += 1; 2125af31f5e5SChris Mason } 2126af31f5e5SChris Mason root_backup = super->super_roots + newest; 2127af31f5e5SChris Mason 2128af31f5e5SChris Mason btrfs_set_super_generation(super, 2129af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 2130af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 2131af31f5e5SChris Mason btrfs_set_super_root_level(super, 2132af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 2133af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 2134af31f5e5SChris Mason 2135af31f5e5SChris Mason /* 2136af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 2137af31f5e5SChris Mason * need a fsck 2138af31f5e5SChris Mason */ 2139af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 2140af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 2141af31f5e5SChris Mason return 0; 2142af31f5e5SChris Mason } 2143af31f5e5SChris Mason 21447abadb64SLiu Bo /* helper to cleanup workers */ 21457abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 21467abadb64SLiu Bo { 2147dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 2148afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 21495cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 2150fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 2151fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_meta_workers); 2152fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 21538b110e39SMiao Xie btrfs_destroy_workqueue(fs_info->endio_repair_workers); 2154d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 2155fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 2156fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 2157fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 2158a8c93d4eSQu Wenruo btrfs_destroy_workqueue(fs_info->submit_workers); 21595b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 2160e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 2161736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 2162a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 2163fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 2164a79b7d4bSChris Mason btrfs_destroy_workqueue(fs_info->extent_workers); 21657abadb64SLiu Bo } 21667abadb64SLiu Bo 21672e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 21682e9f5954SRashika { 21692e9f5954SRashika if (root) { 21702e9f5954SRashika free_extent_buffer(root->node); 21712e9f5954SRashika free_extent_buffer(root->commit_root); 21722e9f5954SRashika root->node = NULL; 21732e9f5954SRashika root->commit_root = NULL; 21742e9f5954SRashika } 21752e9f5954SRashika } 21762e9f5954SRashika 2177af31f5e5SChris Mason /* helper to cleanup tree roots */ 2178af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 2179af31f5e5SChris Mason { 21802e9f5954SRashika free_root_extent_buffers(info->tree_root); 2181655b09feSJosef Bacik 21822e9f5954SRashika free_root_extent_buffers(info->dev_root); 21832e9f5954SRashika free_root_extent_buffers(info->extent_root); 21842e9f5954SRashika free_root_extent_buffers(info->csum_root); 21852e9f5954SRashika free_root_extent_buffers(info->quota_root); 21862e9f5954SRashika free_root_extent_buffers(info->uuid_root); 21872e9f5954SRashika if (chunk_root) 21882e9f5954SRashika free_root_extent_buffers(info->chunk_root); 218970f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 2190af31f5e5SChris Mason } 2191af31f5e5SChris Mason 2192faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 2193171f6537SJosef Bacik { 2194171f6537SJosef Bacik int ret; 2195171f6537SJosef Bacik struct btrfs_root *gang[8]; 2196171f6537SJosef Bacik int i; 2197171f6537SJosef Bacik 2198171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2199171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2200171f6537SJosef Bacik struct btrfs_root, root_list); 2201171f6537SJosef Bacik list_del(&gang[0]->root_list); 2202171f6537SJosef Bacik 220327cdeb70SMiao Xie if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { 2204cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 2205171f6537SJosef Bacik } else { 2206171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2207171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2208b0feb9d9SMiao Xie btrfs_put_fs_root(gang[0]); 2209171f6537SJosef Bacik } 2210171f6537SJosef Bacik } 2211171f6537SJosef Bacik 2212171f6537SJosef Bacik while (1) { 2213171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2214171f6537SJosef Bacik (void **)gang, 0, 2215171f6537SJosef Bacik ARRAY_SIZE(gang)); 2216171f6537SJosef Bacik if (!ret) 2217171f6537SJosef Bacik break; 2218171f6537SJosef Bacik for (i = 0; i < ret; i++) 2219cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2220171f6537SJosef Bacik } 22211a4319ccSLiu Bo 22221a4319ccSLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 22231a4319ccSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 22241a4319ccSLiu Bo btrfs_destroy_pinned_extent(fs_info->tree_root, 22251a4319ccSLiu Bo fs_info->pinned_extents); 22261a4319ccSLiu Bo } 2227171f6537SJosef Bacik } 2228af31f5e5SChris Mason 2229638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2230638aa7edSEric Sandeen { 2231638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2232638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2233638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2234638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2235638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2236638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2237638aa7edSEric Sandeen fs_info->scrub_workers_refcnt = 0; 2238638aa7edSEric Sandeen } 2239638aa7edSEric Sandeen 2240779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2241779a65a4SEric Sandeen { 2242779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2243779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2244779a65a4SEric Sandeen atomic_set(&fs_info->balance_running, 0); 2245779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2246779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2247779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2248779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2249779a65a4SEric Sandeen } 2250779a65a4SEric Sandeen 2251f37938e0SEric Sandeen static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info, 2252f37938e0SEric Sandeen struct btrfs_root *tree_root) 2253f37938e0SEric Sandeen { 2254f37938e0SEric Sandeen fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2255f37938e0SEric Sandeen set_nlink(fs_info->btree_inode, 1); 2256f37938e0SEric Sandeen /* 2257f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2258f37938e0SEric Sandeen * the real end of the address space is determined by all of 2259f37938e0SEric Sandeen * the devices in the system 2260f37938e0SEric Sandeen */ 2261f37938e0SEric Sandeen fs_info->btree_inode->i_size = OFFSET_MAX; 2262f37938e0SEric Sandeen fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 2263f37938e0SEric Sandeen 2264f37938e0SEric Sandeen RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2265f37938e0SEric Sandeen extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2266f37938e0SEric Sandeen fs_info->btree_inode->i_mapping); 2267f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2268f37938e0SEric Sandeen extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 2269f37938e0SEric Sandeen 2270f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2271f37938e0SEric Sandeen 2272f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->root = tree_root; 2273f37938e0SEric Sandeen memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 2274f37938e0SEric Sandeen sizeof(struct btrfs_key)); 2275f37938e0SEric Sandeen set_bit(BTRFS_INODE_DUMMY, 2276f37938e0SEric Sandeen &BTRFS_I(fs_info->btree_inode)->runtime_flags); 2277f37938e0SEric Sandeen btrfs_insert_inode_hash(fs_info->btree_inode); 2278f37938e0SEric Sandeen } 2279f37938e0SEric Sandeen 2280ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2281ad618368SEric Sandeen { 2282ad618368SEric Sandeen fs_info->dev_replace.lock_owner = 0; 2283ad618368SEric Sandeen atomic_set(&fs_info->dev_replace.nesting_level, 0); 2284ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 228573beece9SLiu Bo rwlock_init(&fs_info->dev_replace.lock); 228673beece9SLiu Bo atomic_set(&fs_info->dev_replace.read_locks, 0); 228773beece9SLiu Bo atomic_set(&fs_info->dev_replace.blocking_readers, 0); 2288ad618368SEric Sandeen init_waitqueue_head(&fs_info->replace_wait); 228973beece9SLiu Bo init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); 2290ad618368SEric Sandeen } 2291ad618368SEric Sandeen 2292f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2293f9e92e40SEric Sandeen { 2294f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2295f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2296f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2297f9e92e40SEric Sandeen fs_info->qgroup_op_tree = RB_ROOT; 2298f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2299f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2300f9e92e40SEric Sandeen fs_info->quota_enabled = 0; 2301f9e92e40SEric Sandeen fs_info->pending_quota_state = 0; 2302f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2303f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2304f9e92e40SEric Sandeen } 2305f9e92e40SEric Sandeen 23062a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 23072a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 23082a458198SEric Sandeen { 23092a458198SEric Sandeen int max_active = fs_info->thread_pool_size; 23106f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 23112a458198SEric Sandeen 23122a458198SEric Sandeen fs_info->workers = 2313cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2314cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 23152a458198SEric Sandeen 23162a458198SEric Sandeen fs_info->delalloc_workers = 2317cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2318cb001095SJeff Mahoney flags, max_active, 2); 23192a458198SEric Sandeen 23202a458198SEric Sandeen fs_info->flush_workers = 2321cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2322cb001095SJeff Mahoney flags, max_active, 0); 23232a458198SEric Sandeen 23242a458198SEric Sandeen fs_info->caching_workers = 2325cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 23262a458198SEric Sandeen 23272a458198SEric Sandeen /* 23282a458198SEric Sandeen * a higher idle thresh on the submit workers makes it much more 23292a458198SEric Sandeen * likely that bios will be send down in a sane order to the 23302a458198SEric Sandeen * devices 23312a458198SEric Sandeen */ 23322a458198SEric Sandeen fs_info->submit_workers = 2333cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "submit", flags, 23342a458198SEric Sandeen min_t(u64, fs_devices->num_devices, 23352a458198SEric Sandeen max_active), 64); 23362a458198SEric Sandeen 23372a458198SEric Sandeen fs_info->fixup_workers = 2338cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 23392a458198SEric Sandeen 23402a458198SEric Sandeen /* 23412a458198SEric Sandeen * endios are largely parallel and should have a very 23422a458198SEric Sandeen * low idle thresh 23432a458198SEric Sandeen */ 23442a458198SEric Sandeen fs_info->endio_workers = 2345cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 23462a458198SEric Sandeen fs_info->endio_meta_workers = 2347cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2348cb001095SJeff Mahoney max_active, 4); 23492a458198SEric Sandeen fs_info->endio_meta_write_workers = 2350cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2351cb001095SJeff Mahoney max_active, 2); 23522a458198SEric Sandeen fs_info->endio_raid56_workers = 2353cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2354cb001095SJeff Mahoney max_active, 4); 23552a458198SEric Sandeen fs_info->endio_repair_workers = 2356cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); 23572a458198SEric Sandeen fs_info->rmw_workers = 2358cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 23592a458198SEric Sandeen fs_info->endio_write_workers = 2360cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2361cb001095SJeff Mahoney max_active, 2); 23622a458198SEric Sandeen fs_info->endio_freespace_worker = 2363cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2364cb001095SJeff Mahoney max_active, 0); 23652a458198SEric Sandeen fs_info->delayed_workers = 2366cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2367cb001095SJeff Mahoney max_active, 0); 23682a458198SEric Sandeen fs_info->readahead_workers = 2369cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2370cb001095SJeff Mahoney max_active, 2); 23712a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2372cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 23732a458198SEric Sandeen fs_info->extent_workers = 2374cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "extent-refs", flags, 23752a458198SEric Sandeen min_t(u64, fs_devices->num_devices, 23762a458198SEric Sandeen max_active), 8); 23772a458198SEric Sandeen 23782a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 23792a458198SEric Sandeen fs_info->submit_workers && fs_info->flush_workers && 23802a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 23812a458198SEric Sandeen fs_info->endio_meta_write_workers && 23822a458198SEric Sandeen fs_info->endio_repair_workers && 23832a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 23842a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 23852a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 23862a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 23872a458198SEric Sandeen fs_info->extent_workers && 23882a458198SEric Sandeen fs_info->qgroup_rescan_workers)) { 23892a458198SEric Sandeen return -ENOMEM; 23902a458198SEric Sandeen } 23912a458198SEric Sandeen 23922a458198SEric Sandeen return 0; 23932a458198SEric Sandeen } 23942a458198SEric Sandeen 239563443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 239663443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 239763443bf5SEric Sandeen { 239863443bf5SEric Sandeen int ret; 239963443bf5SEric Sandeen struct btrfs_root *tree_root = fs_info->tree_root; 240063443bf5SEric Sandeen struct btrfs_root *log_tree_root; 240163443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 240263443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 240363443bf5SEric Sandeen 240463443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2405f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 240663443bf5SEric Sandeen return -EIO; 240763443bf5SEric Sandeen } 240863443bf5SEric Sandeen 240974e4d827SDavid Sterba log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 241063443bf5SEric Sandeen if (!log_tree_root) 241163443bf5SEric Sandeen return -ENOMEM; 241263443bf5SEric Sandeen 241363443bf5SEric Sandeen __setup_root(tree_root->nodesize, tree_root->sectorsize, 241463443bf5SEric Sandeen tree_root->stripesize, log_tree_root, fs_info, 241563443bf5SEric Sandeen BTRFS_TREE_LOG_OBJECTID); 241663443bf5SEric Sandeen 241763443bf5SEric Sandeen log_tree_root->node = read_tree_block(tree_root, bytenr, 241863443bf5SEric Sandeen fs_info->generation + 1); 241964c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2420f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 24210eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 242264c043deSLiu Bo kfree(log_tree_root); 24230eeff236SLiu Bo return ret; 242464c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2425f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 242663443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 242763443bf5SEric Sandeen kfree(log_tree_root); 242863443bf5SEric Sandeen return -EIO; 242963443bf5SEric Sandeen } 243063443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 243163443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 243263443bf5SEric Sandeen if (ret) { 243334d97007SAnand Jain btrfs_handle_fs_error(tree_root->fs_info, ret, 243463443bf5SEric Sandeen "Failed to recover log tree"); 243563443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 243663443bf5SEric Sandeen kfree(log_tree_root); 243763443bf5SEric Sandeen return ret; 243863443bf5SEric Sandeen } 243963443bf5SEric Sandeen 244063443bf5SEric Sandeen if (fs_info->sb->s_flags & MS_RDONLY) { 244163443bf5SEric Sandeen ret = btrfs_commit_super(tree_root); 244263443bf5SEric Sandeen if (ret) 244363443bf5SEric Sandeen return ret; 244463443bf5SEric Sandeen } 244563443bf5SEric Sandeen 244663443bf5SEric Sandeen return 0; 244763443bf5SEric Sandeen } 244863443bf5SEric Sandeen 24494bbcaa64SEric Sandeen static int btrfs_read_roots(struct btrfs_fs_info *fs_info, 24504bbcaa64SEric Sandeen struct btrfs_root *tree_root) 24514bbcaa64SEric Sandeen { 2452a4f3d2c4SDavid Sterba struct btrfs_root *root; 24534bbcaa64SEric Sandeen struct btrfs_key location; 24544bbcaa64SEric Sandeen int ret; 24554bbcaa64SEric Sandeen 24564bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 24574bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 24584bbcaa64SEric Sandeen location.offset = 0; 24594bbcaa64SEric Sandeen 2460a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2461a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2462a4f3d2c4SDavid Sterba return PTR_ERR(root); 2463a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2464a4f3d2c4SDavid Sterba fs_info->extent_root = root; 24654bbcaa64SEric Sandeen 24664bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2467a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2468a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2469a4f3d2c4SDavid Sterba return PTR_ERR(root); 2470a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2471a4f3d2c4SDavid Sterba fs_info->dev_root = root; 24724bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 24734bbcaa64SEric Sandeen 24744bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2475a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2476a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2477a4f3d2c4SDavid Sterba return PTR_ERR(root); 2478a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2479a4f3d2c4SDavid Sterba fs_info->csum_root = root; 24804bbcaa64SEric Sandeen 24814bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2482a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2483a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2484a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 24854bbcaa64SEric Sandeen fs_info->quota_enabled = 1; 24864bbcaa64SEric Sandeen fs_info->pending_quota_state = 1; 2487a4f3d2c4SDavid Sterba fs_info->quota_root = root; 24884bbcaa64SEric Sandeen } 24894bbcaa64SEric Sandeen 24904bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2491a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2492a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2493a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 24944bbcaa64SEric Sandeen if (ret != -ENOENT) 24954bbcaa64SEric Sandeen return ret; 24964bbcaa64SEric Sandeen } else { 2497a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2498a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 24994bbcaa64SEric Sandeen } 25004bbcaa64SEric Sandeen 250170f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 250270f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 250370f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 250470f6d82eSOmar Sandoval if (IS_ERR(root)) 250570f6d82eSOmar Sandoval return PTR_ERR(root); 250670f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 250770f6d82eSOmar Sandoval fs_info->free_space_root = root; 250870f6d82eSOmar Sandoval } 250970f6d82eSOmar Sandoval 25104bbcaa64SEric Sandeen return 0; 25114bbcaa64SEric Sandeen } 25124bbcaa64SEric Sandeen 2513ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 2514dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2515dfe25020SChris Mason char *options) 2516eb60ceacSChris Mason { 2517db94535dSChris Mason u32 sectorsize; 2518db94535dSChris Mason u32 nodesize; 251987ee04ebSChris Mason u32 stripesize; 252084234f3aSYan Zheng u64 generation; 2521f2b636e8SJosef Bacik u64 features; 25223de4586cSChris Mason struct btrfs_key location; 2523a061fc8dSChris Mason struct buffer_head *bh; 25244d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2525815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2526f84a8bd6SAl Viro struct btrfs_root *tree_root; 25274d34b278SIlya Dryomov struct btrfs_root *chunk_root; 2528eb60ceacSChris Mason int ret; 2529e58ca020SYan int err = -EINVAL; 2530af31f5e5SChris Mason int num_backups_tried = 0; 2531af31f5e5SChris Mason int backup_index = 0; 25325cdc7ad3SQu Wenruo int max_active; 25334543df7eSChris Mason 253474e4d827SDavid Sterba tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 253574e4d827SDavid Sterba chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 2536cb517eabSMiao Xie if (!tree_root || !chunk_root) { 253739279cc3SChris Mason err = -ENOMEM; 253839279cc3SChris Mason goto fail; 253939279cc3SChris Mason } 254076dda93cSYan, Zheng 254176dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 254276dda93cSYan, Zheng if (ret) { 254376dda93cSYan, Zheng err = ret; 254476dda93cSYan, Zheng goto fail; 254576dda93cSYan, Zheng } 254676dda93cSYan, Zheng 254776dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 254876dda93cSYan, Zheng if (ret) { 254976dda93cSYan, Zheng err = ret; 255076dda93cSYan, Zheng goto fail_srcu; 255176dda93cSYan, Zheng } 255276dda93cSYan, Zheng 2553908c7f19STejun Heo ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 2554e2d84521SMiao Xie if (ret) { 2555e2d84521SMiao Xie err = ret; 2556e2d84521SMiao Xie goto fail_bdi; 2557e2d84521SMiao Xie } 255809cbfeafSKirill A. Shutemov fs_info->dirty_metadata_batch = PAGE_SIZE * 2559e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2560e2d84521SMiao Xie 2561908c7f19STejun Heo ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2562963d678bSMiao Xie if (ret) { 2563963d678bSMiao Xie err = ret; 2564963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2565963d678bSMiao Xie } 2566963d678bSMiao Xie 2567908c7f19STejun Heo ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); 2568c404e0dcSMiao Xie if (ret) { 2569c404e0dcSMiao Xie err = ret; 2570c404e0dcSMiao Xie goto fail_delalloc_bytes; 2571c404e0dcSMiao Xie } 2572c404e0dcSMiao Xie 257376dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 257476dda93cSYan, Zheng if (!fs_info->btree_inode) { 257576dda93cSYan, Zheng err = -ENOMEM; 2576c404e0dcSMiao Xie goto fail_bio_counter; 257776dda93cSYan, Zheng } 257876dda93cSYan, Zheng 2579a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 25801561dedaSMiao Xie 258176dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2582f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 25838fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2584facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 258524bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2586eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 258711833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2588eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2589a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 259076dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 259124bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 25924cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 25932bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2594f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2595ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2596fcebe456SJosef Bacik spin_lock_init(&fs_info->qgroup_op_lock); 2597f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 259847ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2599f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2600d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 260167c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 26027585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2603573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2604c2d6cb16SFilipe Manana mutex_init(&fs_info->cleaner_delayed_iput_mutex); 2605de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 260619c00ddcSChris Mason 26070b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 26086324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2609f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 261047ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 26110b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 261266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 261366d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 261466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 261566d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 261666d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 261766d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 261866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 261966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 262066d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2621cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2622771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 26238c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 26240986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 26254cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2626fcebe456SJosef Bacik atomic_set(&fs_info->qgroup_op_seq, 0); 26272fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2628fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 2629e20d96d6SChris Mason fs_info->sb = sb; 263095ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 26319ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 26324cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 26332bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2634f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 26358b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2636f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 263790519d66SArne Jansen /* readahead state */ 2638d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 263990519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2640c8b97818SChris Mason 2641b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2642b34b086cSChris Mason num_online_cpus() + 2, 8); 26430afbaf8cSChris Mason 2644199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2645199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 264616cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 264774e4d827SDavid Sterba GFP_KERNEL); 264816cdcec7SMiao Xie if (!fs_info->delayed_root) { 264916cdcec7SMiao Xie err = -ENOMEM; 265016cdcec7SMiao Xie goto fail_iput; 265116cdcec7SMiao Xie } 265216cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 26533eaa2885SChris Mason 2654638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 265521adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 265621adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 265721adbd5cSStefan Behrens #endif 2658779a65a4SEric Sandeen btrfs_init_balance(fs_info); 265921c7e756SMiao Xie btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); 2660a2de733cSArne Jansen 2661a061fc8dSChris Mason sb->s_blocksize = 4096; 2662a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 266332a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 2664a061fc8dSChris Mason 2665f37938e0SEric Sandeen btrfs_init_btree_inode(fs_info, tree_root); 266639279cc3SChris Mason 2667e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 26686bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2669a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2670925baeddSChris Mason 267111833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2672f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 267311833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2674f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 267511833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2676e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2677f9295749SChris Mason 2678d98237b3SChris Mason 26795a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 268030ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2681925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2682925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2683a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2684a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 26851bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 26869e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2687c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 268876dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2689803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2690fa9c0d79SChris Mason 2691ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2692f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2693416ac51dSArne Jansen 2694fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2695fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2696fa9c0d79SChris Mason 26977d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 26983768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2699bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 27004854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 27019a8dd150SChris Mason 270204216820SFilipe Manana INIT_LIST_HEAD(&fs_info->pinned_chunks); 270304216820SFilipe Manana 270453b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 270553b381b3SDavid Woodhouse if (ret) { 270683c8266aSDavid Sterba err = ret; 270753b381b3SDavid Woodhouse goto fail_alloc; 270853b381b3SDavid Woodhouse } 270953b381b3SDavid Woodhouse 2710707e8a07SDavid Sterba __setup_root(4096, 4096, 4096, tree_root, 27112c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 27127eccb903SChris Mason 27133c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 27141104a885SDavid Sterba 27151104a885SDavid Sterba /* 27161104a885SDavid Sterba * Read super block and check the signature bytes only 27171104a885SDavid Sterba */ 2718a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 271992fc03fbSAnand Jain if (IS_ERR(bh)) { 272092fc03fbSAnand Jain err = PTR_ERR(bh); 272116cdcec7SMiao Xie goto fail_alloc; 272220b45077SDave Young } 272339279cc3SChris Mason 27241104a885SDavid Sterba /* 27251104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 27261104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 27271104a885SDavid Sterba */ 27281104a885SDavid Sterba if (btrfs_check_super_csum(bh->b_data)) { 272905135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 27301104a885SDavid Sterba err = -EINVAL; 2731b2acdddfSAnand Jain brelse(bh); 27321104a885SDavid Sterba goto fail_alloc; 27331104a885SDavid Sterba } 27341104a885SDavid Sterba 27351104a885SDavid Sterba /* 27361104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 27371104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 27381104a885SDavid Sterba * the whole block of INFO_SIZE 27391104a885SDavid Sterba */ 27406c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 27416c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 27426c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2743a061fc8dSChris Mason brelse(bh); 27445f39d397SChris Mason 27456c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 27460b86a832SChris Mason 27471104a885SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 27481104a885SDavid Sterba if (ret) { 274905135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 27501104a885SDavid Sterba err = -EINVAL; 27511104a885SDavid Sterba goto fail_alloc; 27521104a885SDavid Sterba } 27531104a885SDavid Sterba 27546c41761fSDavid Sterba disk_super = fs_info->super_copy; 27550f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 275616cdcec7SMiao Xie goto fail_alloc; 27570f7d52f4SChris Mason 2758acce952bSliubo /* check FS state, whether FS is broken. */ 275987533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 276087533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2761acce952bSliubo 276275e7cb7fSLiu Bo /* 2763af31f5e5SChris Mason * run through our array of backup supers and setup 2764af31f5e5SChris Mason * our ring pointer to the oldest one 2765af31f5e5SChris Mason */ 2766af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2767af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2768af31f5e5SChris Mason 2769af31f5e5SChris Mason /* 277075e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 277175e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 277275e7cb7fSLiu Bo */ 277375e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 277475e7cb7fSLiu Bo 277596da0919SQu Wenruo ret = btrfs_parse_options(tree_root, options, sb->s_flags); 27762b82032cSYan Zheng if (ret) { 27772b82032cSYan Zheng err = ret; 277816cdcec7SMiao Xie goto fail_alloc; 27792b82032cSYan Zheng } 2780dfe25020SChris Mason 2781f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2782f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2783f2b636e8SJosef Bacik if (features) { 278405135f59SDavid Sterba btrfs_err(fs_info, 278505135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 2786c1c9ff7cSGeert Uytterhoeven features); 2787f2b636e8SJosef Bacik err = -EINVAL; 278816cdcec7SMiao Xie goto fail_alloc; 2789f2b636e8SJosef Bacik } 2790f2b636e8SJosef Bacik 27915d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 27925d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 279369e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2794a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2795727011e0SChris Mason 27963173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 279705135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 27983173a18fSJosef Bacik 2799727011e0SChris Mason /* 2800727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2801727011e0SChris Mason * they are bigger than the page size 2802727011e0SChris Mason */ 280309cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 2804727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 280505135f59SDavid Sterba btrfs_info(fs_info, 280605135f59SDavid Sterba "flagging fs with big metadata feature"); 2807727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2808727011e0SChris Mason } 2809727011e0SChris Mason 2810bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2811bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2812b7f67055SChandan Rajendra stripesize = sectorsize; 2813707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 2814963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2815bc3f116fSChris Mason 2816bc3f116fSChris Mason /* 2817bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2818bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2819bc3f116fSChris Mason */ 2820bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2821707e8a07SDavid Sterba (sectorsize != nodesize)) { 282205135f59SDavid Sterba btrfs_err(fs_info, 282305135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 282405135f59SDavid Sterba nodesize, sectorsize); 2825bc3f116fSChris Mason goto fail_alloc; 2826bc3f116fSChris Mason } 2827bc3f116fSChris Mason 2828ceda0864SMiao Xie /* 2829ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2830ceda0864SMiao Xie * update the flag. 2831ceda0864SMiao Xie */ 28325d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 28335d4f98a2SYan Zheng 2834f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2835f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2836f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 283705135f59SDavid Sterba btrfs_err(fs_info, 283805135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 2839c1c9ff7cSGeert Uytterhoeven features); 2840f2b636e8SJosef Bacik err = -EINVAL; 284116cdcec7SMiao Xie goto fail_alloc; 2842f2b636e8SJosef Bacik } 284361d92c32SChris Mason 28445cdc7ad3SQu Wenruo max_active = fs_info->thread_pool_size; 284561d92c32SChris Mason 28462a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 28472a458198SEric Sandeen if (ret) { 28482a458198SEric Sandeen err = ret; 28490dc3b84aSJosef Bacik goto fail_sb_buffer; 28500dc3b84aSJosef Bacik } 28514543df7eSChris Mason 28524575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2853c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 285409cbfeafSKirill A. Shutemov SZ_4M / PAGE_SIZE); 28554575c9ccSChris Mason 2856db94535dSChris Mason tree_root->nodesize = nodesize; 2857db94535dSChris Mason tree_root->sectorsize = sectorsize; 285887ee04ebSChris Mason tree_root->stripesize = stripesize; 2859a061fc8dSChris Mason 2860a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2861a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2862db94535dSChris Mason 2863925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2864e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2865925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 286684eed90fSChris Mason if (ret) { 286705135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 28685d4f98a2SYan Zheng goto fail_sb_buffer; 286984eed90fSChris Mason } 28700b86a832SChris Mason 287184234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 28720b86a832SChris Mason 2873707e8a07SDavid Sterba __setup_root(nodesize, sectorsize, stripesize, chunk_root, 2874707e8a07SDavid Sterba fs_info, BTRFS_CHUNK_TREE_OBJECTID); 28750b86a832SChris Mason 28760b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 28770b86a832SChris Mason btrfs_super_chunk_root(disk_super), 2878ce86cd59SDavid Sterba generation); 287964c043deSLiu Bo if (IS_ERR(chunk_root->node) || 288064c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 288105135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 2882e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 2883e5fffbacSchandan free_extent_buffer(chunk_root->node); 288495ab1f64SZhao Lei chunk_root->node = NULL; 2885af31f5e5SChris Mason goto fail_tree_roots; 288683121942SDavid Woodhouse } 28875d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 28885d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 28890b86a832SChris Mason 2890e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2891b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); 2892e17cade2SChris Mason 28930b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 28942b82032cSYan Zheng if (ret) { 289505135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 2896af31f5e5SChris Mason goto fail_tree_roots; 28972b82032cSYan Zheng } 28980b86a832SChris Mason 28998dabb742SStefan Behrens /* 29008dabb742SStefan Behrens * keep the device that is marked to be the target device for the 29018dabb742SStefan Behrens * dev_replace procedure 29028dabb742SStefan Behrens */ 29039eaed21eSEric Sandeen btrfs_close_extra_devices(fs_devices, 0); 2904dfe25020SChris Mason 2905a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 290605135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 2907a6b0d5c8SChris Mason goto fail_tree_roots; 2908a6b0d5c8SChris Mason } 2909a6b0d5c8SChris Mason 2910af31f5e5SChris Mason retry_root_backup: 291184234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 29120b86a832SChris Mason 2913e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2914db94535dSChris Mason btrfs_super_root(disk_super), 2915ce86cd59SDavid Sterba generation); 291664c043deSLiu Bo if (IS_ERR(tree_root->node) || 291764c043deSLiu Bo !extent_buffer_uptodate(tree_root->node)) { 291805135f59SDavid Sterba btrfs_warn(fs_info, "failed to read tree root"); 2919e5fffbacSchandan if (!IS_ERR(tree_root->node)) 2920e5fffbacSchandan free_extent_buffer(tree_root->node); 292195ab1f64SZhao Lei tree_root->node = NULL; 2922af31f5e5SChris Mason goto recovery_tree_root; 292383121942SDavid Woodhouse } 2924af31f5e5SChris Mason 29255d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 29265d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 292769e9c6c6SStefan Behrens btrfs_set_root_refs(&tree_root->root_item, 1); 2928db94535dSChris Mason 2929f32e48e9SChandan Rajendra mutex_lock(&tree_root->objectid_mutex); 2930f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(tree_root, 2931f32e48e9SChandan Rajendra &tree_root->highest_objectid); 2932f32e48e9SChandan Rajendra if (ret) { 2933f32e48e9SChandan Rajendra mutex_unlock(&tree_root->objectid_mutex); 2934f32e48e9SChandan Rajendra goto recovery_tree_root; 2935f32e48e9SChandan Rajendra } 2936f32e48e9SChandan Rajendra 2937f32e48e9SChandan Rajendra ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2938f32e48e9SChandan Rajendra 2939f32e48e9SChandan Rajendra mutex_unlock(&tree_root->objectid_mutex); 2940f32e48e9SChandan Rajendra 29414bbcaa64SEric Sandeen ret = btrfs_read_roots(fs_info, tree_root); 29424bbcaa64SEric Sandeen if (ret) 2943af31f5e5SChris Mason goto recovery_tree_root; 2944f7a81ea4SStefan Behrens 29458929ecfaSYan, Zheng fs_info->generation = generation; 29468929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 29478929ecfaSYan, Zheng 294868310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 294968310a5eSIlya Dryomov if (ret) { 295005135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 295168310a5eSIlya Dryomov goto fail_block_groups; 295268310a5eSIlya Dryomov } 295368310a5eSIlya Dryomov 2954733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2955733f4fbbSStefan Behrens if (ret) { 295605135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 2957733f4fbbSStefan Behrens goto fail_block_groups; 2958733f4fbbSStefan Behrens } 2959733f4fbbSStefan Behrens 29608dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 29618dabb742SStefan Behrens if (ret) { 296205135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 29638dabb742SStefan Behrens goto fail_block_groups; 29648dabb742SStefan Behrens } 29658dabb742SStefan Behrens 29669eaed21eSEric Sandeen btrfs_close_extra_devices(fs_devices, 1); 29678dabb742SStefan Behrens 2968b7c35e81SAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices, NULL); 2969b7c35e81SAnand Jain if (ret) { 297005135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 297105135f59SDavid Sterba ret); 2972b7c35e81SAnand Jain goto fail_block_groups; 2973b7c35e81SAnand Jain } 2974b7c35e81SAnand Jain 2975b7c35e81SAnand Jain ret = btrfs_sysfs_add_device(fs_devices); 2976b7c35e81SAnand Jain if (ret) { 297705135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs device interface: %d", 297805135f59SDavid Sterba ret); 2979b7c35e81SAnand Jain goto fail_fsdev_sysfs; 2980b7c35e81SAnand Jain } 2981b7c35e81SAnand Jain 298296f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 29835ac1d209SJeff Mahoney if (ret) { 298405135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 2985b7c35e81SAnand Jain goto fail_fsdev_sysfs; 29865ac1d209SJeff Mahoney } 29875ac1d209SJeff Mahoney 2988c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2989c59021f8Sliubo if (ret) { 299005135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 29912365dd3cSAnand Jain goto fail_sysfs; 2992c59021f8Sliubo } 2993c59021f8Sliubo 29944bbcaa64SEric Sandeen ret = btrfs_read_block_groups(fs_info->extent_root); 29951b1d1f66SJosef Bacik if (ret) { 299605135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 29972365dd3cSAnand Jain goto fail_sysfs; 29981b1d1f66SJosef Bacik } 29995af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 30005af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 3001292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 3002292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 3003292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 300405135f59SDavid Sterba btrfs_warn(fs_info, 300505135f59SDavid Sterba "missing devices (%llu) exceeds the limit (%d), writeable mount is not allowed", 300678fa1770SZhao Lei fs_info->fs_devices->missing_devices, 300778fa1770SZhao Lei fs_info->num_tolerated_disk_barrier_failures); 30082365dd3cSAnand Jain goto fail_sysfs; 3009292fd7fcSStefan Behrens } 30109078a3e1SChris Mason 3011a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3012a74a4b97SChris Mason "btrfs-cleaner"); 301357506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 30142365dd3cSAnand Jain goto fail_sysfs; 3015a74a4b97SChris Mason 3016a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3017a74a4b97SChris Mason tree_root, 3018a74a4b97SChris Mason "btrfs-transaction"); 301957506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 30203f157a2fSChris Mason goto fail_cleaner; 3021a74a4b97SChris Mason 3022c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 3023c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 3024c289811cSChris Mason !fs_info->fs_devices->rotating) { 302505135f59SDavid Sterba btrfs_info(fs_info, "detected SSD devices, enabling SSD mode"); 3026c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 3027c289811cSChris Mason } 3028c289811cSChris Mason 3029572d9ab7SDavid Sterba /* 303001327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3031572d9ab7SDavid Sterba * not have to wait for transaction commit 3032572d9ab7SDavid Sterba */ 3033572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 30343818aea2SQu Wenruo 303521adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 303621adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 303721adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 303821adbd5cSStefan Behrens btrfs_test_opt(tree_root, 303921adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 304021adbd5cSStefan Behrens 1 : 0, 304121adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 304221adbd5cSStefan Behrens if (ret) 304305135f59SDavid Sterba btrfs_warn(fs_info, 304405135f59SDavid Sterba "failed to initialize integrity check module: %d", 304505135f59SDavid Sterba ret); 304621adbd5cSStefan Behrens } 304721adbd5cSStefan Behrens #endif 3048bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3049bcef60f2SArne Jansen if (ret) 3050bcef60f2SArne Jansen goto fail_trans_kthread; 305121adbd5cSStefan Behrens 305296da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 305396da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 305496da0919SQu Wenruo !btrfs_test_opt(tree_root, NOLOGREPLAY)) { 305563443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 305679787eaaSJeff Mahoney if (ret) { 305763443bf5SEric Sandeen err = ret; 305828c16cbbSWang Shilong goto fail_qgroup; 3059e556ce2cSYan Zheng } 3060e02119d5SChris Mason } 30611a40e23bSZheng Yan 306276dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 306379787eaaSJeff Mahoney if (ret) 306428c16cbbSWang Shilong goto fail_qgroup; 306576dda93cSYan, Zheng 30667c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 3067d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 306844c44af2SIlya Dryomov if (ret) 306928c16cbbSWang Shilong goto fail_qgroup; 307090c711abSZygo Blaxell 307190c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 30725d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 307390c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3074d7ce5843SMiao Xie if (ret < 0) { 307505135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 307605135f59SDavid Sterba ret); 3077d7ce5843SMiao Xie err = -EINVAL; 3078bcef60f2SArne Jansen goto fail_qgroup; 3079d7ce5843SMiao Xie } 30807c2ca468SChris Mason } 30811a40e23bSZheng Yan 30823de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 30833de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 3084cb517eabSMiao Xie location.offset = 0; 30853de4586cSChris Mason 30863de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 30873140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 30883140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3089bcef60f2SArne Jansen goto fail_qgroup; 30903140c9a3SDan Carpenter } 3091c289811cSChris Mason 30922b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 30932b6ba629SIlya Dryomov return 0; 30942b6ba629SIlya Dryomov 3095511711afSChris Mason if (btrfs_test_opt(tree_root, FREE_SPACE_TREE) && 3096511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 309705135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3098511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3099511711afSChris Mason if (ret) { 310005135f59SDavid Sterba btrfs_warn(fs_info, 310105135f59SDavid Sterba "failed to create free space tree: %d", ret); 3102511711afSChris Mason close_ctree(tree_root); 3103511711afSChris Mason return ret; 3104511711afSChris Mason } 3105511711afSChris Mason } 3106511711afSChris Mason 3107e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 31082b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 31092b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 31102b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 31112b6ba629SIlya Dryomov close_ctree(tree_root); 31122b6ba629SIlya Dryomov return ret; 31132b6ba629SIlya Dryomov } 3114e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 311559641015SIlya Dryomov 31162b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 31172b6ba629SIlya Dryomov if (ret) { 311805135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 311966b4ffd1SJosef Bacik close_ctree(tree_root); 31202b6ba629SIlya Dryomov return ret; 3121e3acc2a6SJosef Bacik } 3122e3acc2a6SJosef Bacik 31238dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 31248dabb742SStefan Behrens if (ret) { 312505135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 31268dabb742SStefan Behrens close_ctree(tree_root); 31278dabb742SStefan Behrens return ret; 31288dabb742SStefan Behrens } 31298dabb742SStefan Behrens 3130b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3131b382a324SJan Schmidt 313270f6d82eSOmar Sandoval if (btrfs_test_opt(tree_root, CLEAR_CACHE) && 313370f6d82eSOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 313405135f59SDavid Sterba btrfs_info(fs_info, "clearing free space tree"); 313570f6d82eSOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 313670f6d82eSOmar Sandoval if (ret) { 313705135f59SDavid Sterba btrfs_warn(fs_info, 313805135f59SDavid Sterba "failed to clear free space tree: %d", ret); 313970f6d82eSOmar Sandoval close_ctree(tree_root); 314070f6d82eSOmar Sandoval return ret; 314170f6d82eSOmar Sandoval } 314270f6d82eSOmar Sandoval } 314370f6d82eSOmar Sandoval 31444bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 314505135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3146f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3147f7a81ea4SStefan Behrens if (ret) { 314805135f59SDavid Sterba btrfs_warn(fs_info, 314905135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 3150f7a81ea4SStefan Behrens close_ctree(tree_root); 3151f7a81ea4SStefan Behrens return ret; 3152f7a81ea4SStefan Behrens } 31534bbcaa64SEric Sandeen } else if (btrfs_test_opt(tree_root, RESCAN_UUID_TREE) || 31544bbcaa64SEric Sandeen fs_info->generation != 31554bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 315605135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 315770f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 315870f80175SStefan Behrens if (ret) { 315905135f59SDavid Sterba btrfs_warn(fs_info, 316005135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 316170f80175SStefan Behrens close_ctree(tree_root); 316270f80175SStefan Behrens return ret; 316370f80175SStefan Behrens } 316470f80175SStefan Behrens } else { 316570f80175SStefan Behrens fs_info->update_uuid_tree_gen = 1; 3166f7a81ea4SStefan Behrens } 3167f7a81ea4SStefan Behrens 316847ab2a6cSJosef Bacik fs_info->open = 1; 316947ab2a6cSJosef Bacik 31708dcddfa0SQu Wenruo /* 31718dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 31728dcddfa0SQu Wenruo * no need to keep the flag 31738dcddfa0SQu Wenruo */ 31748dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 31758dcddfa0SQu Wenruo 3176ad2b2c80SAl Viro return 0; 317739279cc3SChris Mason 3178bcef60f2SArne Jansen fail_qgroup: 3179bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 31807c2ca468SChris Mason fail_trans_kthread: 31817c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 318254067ae9SJosef Bacik btrfs_cleanup_transaction(fs_info->tree_root); 3183faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 31843f157a2fSChris Mason fail_cleaner: 3185a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 31867c2ca468SChris Mason 31877c2ca468SChris Mason /* 31887c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 31897c2ca468SChris Mason * kthreads 31907c2ca468SChris Mason */ 31917c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 31927c2ca468SChris Mason 31932365dd3cSAnand Jain fail_sysfs: 31946618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 31952365dd3cSAnand Jain 3196b7c35e81SAnand Jain fail_fsdev_sysfs: 3197b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3198b7c35e81SAnand Jain 31991b1d1f66SJosef Bacik fail_block_groups: 320054067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 32011b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 3202af31f5e5SChris Mason 3203af31f5e5SChris Mason fail_tree_roots: 3204af31f5e5SChris Mason free_root_pointers(fs_info, 1); 32052b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3206af31f5e5SChris Mason 320739279cc3SChris Mason fail_sb_buffer: 32087abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 320916cdcec7SMiao Xie fail_alloc: 32104543df7eSChris Mason fail_iput: 3211586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3212586e46e2SIlya Dryomov 32134543df7eSChris Mason iput(fs_info->btree_inode); 3214c404e0dcSMiao Xie fail_bio_counter: 3215c404e0dcSMiao Xie percpu_counter_destroy(&fs_info->bio_counter); 3216963d678bSMiao Xie fail_delalloc_bytes: 3217963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3218e2d84521SMiao Xie fail_dirty_metadata_bytes: 3219e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3220ad081f14SJens Axboe fail_bdi: 32217e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 322276dda93cSYan, Zheng fail_srcu: 322376dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 32247e662854SQinghuang Feng fail: 322553b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 3226586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3227ad2b2c80SAl Viro return err; 3228af31f5e5SChris Mason 3229af31f5e5SChris Mason recovery_tree_root: 32308dcddfa0SQu Wenruo if (!btrfs_test_opt(tree_root, USEBACKUPROOT)) 3231af31f5e5SChris Mason goto fail_tree_roots; 3232af31f5e5SChris Mason 3233af31f5e5SChris Mason free_root_pointers(fs_info, 0); 3234af31f5e5SChris Mason 3235af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 3236af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 3237af31f5e5SChris Mason 3238af31f5e5SChris Mason /* we can't trust the free space cache either */ 3239af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 3240af31f5e5SChris Mason 3241af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 3242af31f5e5SChris Mason &num_backups_tried, &backup_index); 3243af31f5e5SChris Mason if (ret == -1) 3244af31f5e5SChris Mason goto fail_block_groups; 3245af31f5e5SChris Mason goto retry_root_backup; 3246eb60ceacSChris Mason } 3247eb60ceacSChris Mason 3248f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 3249f2984462SChris Mason { 3250f2984462SChris Mason if (uptodate) { 3251f2984462SChris Mason set_buffer_uptodate(bh); 3252f2984462SChris Mason } else { 3253442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 3254442a4f63SStefan Behrens bh->b_private; 3255442a4f63SStefan Behrens 3256b14af3b4SDavid Sterba btrfs_warn_rl_in_rcu(device->dev_root->fs_info, 3257b14af3b4SDavid Sterba "lost page write due to IO error on %s", 3258606686eeSJosef Bacik rcu_str_deref(device->name)); 325901327610SNicholas D Steeves /* note, we don't set_buffer_write_io_error because we have 32601259ab75SChris Mason * our own ways of dealing with the IO errors 32611259ab75SChris Mason */ 3262f2984462SChris Mason clear_buffer_uptodate(bh); 3263442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 3264f2984462SChris Mason } 3265f2984462SChris Mason unlock_buffer(bh); 3266f2984462SChris Mason put_bh(bh); 3267f2984462SChris Mason } 3268f2984462SChris Mason 326929c36d72SAnand Jain int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, 327029c36d72SAnand Jain struct buffer_head **bh_ret) 327129c36d72SAnand Jain { 327229c36d72SAnand Jain struct buffer_head *bh; 327329c36d72SAnand Jain struct btrfs_super_block *super; 327429c36d72SAnand Jain u64 bytenr; 327529c36d72SAnand Jain 327629c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 327729c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 327829c36d72SAnand Jain return -EINVAL; 327929c36d72SAnand Jain 328029c36d72SAnand Jain bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE); 328129c36d72SAnand Jain /* 328229c36d72SAnand Jain * If we fail to read from the underlying devices, as of now 328329c36d72SAnand Jain * the best option we have is to mark it EIO. 328429c36d72SAnand Jain */ 328529c36d72SAnand Jain if (!bh) 328629c36d72SAnand Jain return -EIO; 328729c36d72SAnand Jain 328829c36d72SAnand Jain super = (struct btrfs_super_block *)bh->b_data; 328929c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 329029c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 329129c36d72SAnand Jain brelse(bh); 329229c36d72SAnand Jain return -EINVAL; 329329c36d72SAnand Jain } 329429c36d72SAnand Jain 329529c36d72SAnand Jain *bh_ret = bh; 329629c36d72SAnand Jain return 0; 329729c36d72SAnand Jain } 329829c36d72SAnand Jain 329929c36d72SAnand Jain 3300a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 3301a512bbf8SYan Zheng { 3302a512bbf8SYan Zheng struct buffer_head *bh; 3303a512bbf8SYan Zheng struct buffer_head *latest = NULL; 3304a512bbf8SYan Zheng struct btrfs_super_block *super; 3305a512bbf8SYan Zheng int i; 3306a512bbf8SYan Zheng u64 transid = 0; 330792fc03fbSAnand Jain int ret = -EINVAL; 3308a512bbf8SYan Zheng 3309a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3310a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3311a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3312a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3313a512bbf8SYan Zheng */ 3314a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 331529c36d72SAnand Jain ret = btrfs_read_dev_one_super(bdev, i, &bh); 331629c36d72SAnand Jain if (ret) 3317a512bbf8SYan Zheng continue; 3318a512bbf8SYan Zheng 3319a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 3320a512bbf8SYan Zheng 3321a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 3322a512bbf8SYan Zheng brelse(latest); 3323a512bbf8SYan Zheng latest = bh; 3324a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3325a512bbf8SYan Zheng } else { 3326a512bbf8SYan Zheng brelse(bh); 3327a512bbf8SYan Zheng } 3328a512bbf8SYan Zheng } 332992fc03fbSAnand Jain 333092fc03fbSAnand Jain if (!latest) 333192fc03fbSAnand Jain return ERR_PTR(ret); 333292fc03fbSAnand Jain 3333a512bbf8SYan Zheng return latest; 3334a512bbf8SYan Zheng } 3335a512bbf8SYan Zheng 33364eedeb75SHisashi Hifumi /* 33374eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 33384eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 33394eedeb75SHisashi Hifumi * we write are pinned. 33404eedeb75SHisashi Hifumi * 33414eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 33424eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 33434eedeb75SHisashi Hifumi * many supers on this one device should be written. 33444eedeb75SHisashi Hifumi * 33454eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 33464eedeb75SHisashi Hifumi */ 3347a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3348a512bbf8SYan Zheng struct btrfs_super_block *sb, 3349a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 3350a512bbf8SYan Zheng { 3351a512bbf8SYan Zheng struct buffer_head *bh; 3352a512bbf8SYan Zheng int i; 3353a512bbf8SYan Zheng int ret; 3354a512bbf8SYan Zheng int errors = 0; 3355a512bbf8SYan Zheng u32 crc; 3356a512bbf8SYan Zheng u64 bytenr; 3357a512bbf8SYan Zheng 3358a512bbf8SYan Zheng if (max_mirrors == 0) 3359a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3360a512bbf8SYan Zheng 3361a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3362a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3363935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3364935e5cc9SMiao Xie device->commit_total_bytes) 3365a512bbf8SYan Zheng break; 3366a512bbf8SYan Zheng 3367a512bbf8SYan Zheng if (wait) { 3368a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 3369a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3370634554dcSJosef Bacik if (!bh) { 3371634554dcSJosef Bacik errors++; 3372634554dcSJosef Bacik continue; 3373634554dcSJosef Bacik } 3374a512bbf8SYan Zheng wait_on_buffer(bh); 33754eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 33764eedeb75SHisashi Hifumi errors++; 33774eedeb75SHisashi Hifumi 33784eedeb75SHisashi Hifumi /* drop our reference */ 33794eedeb75SHisashi Hifumi brelse(bh); 33804eedeb75SHisashi Hifumi 33814eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 3382a512bbf8SYan Zheng brelse(bh); 3383a512bbf8SYan Zheng continue; 3384a512bbf8SYan Zheng } else { 3385a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3386a512bbf8SYan Zheng 3387a512bbf8SYan Zheng crc = ~(u32)0; 3388b0496686SLiu Bo crc = btrfs_csum_data((char *)sb + 3389a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 3390a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 3391a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 3392a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 3393a512bbf8SYan Zheng 33944eedeb75SHisashi Hifumi /* 33954eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 33964eedeb75SHisashi Hifumi * caller 33974eedeb75SHisashi Hifumi */ 3398a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 3399a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3400634554dcSJosef Bacik if (!bh) { 3401f14d104dSDavid Sterba btrfs_err(device->dev_root->fs_info, 3402f14d104dSDavid Sterba "couldn't get super buffer head for bytenr %llu", 3403f14d104dSDavid Sterba bytenr); 3404634554dcSJosef Bacik errors++; 3405634554dcSJosef Bacik continue; 3406634554dcSJosef Bacik } 3407634554dcSJosef Bacik 3408a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3409a512bbf8SYan Zheng 34104eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3411a512bbf8SYan Zheng get_bh(bh); 34124eedeb75SHisashi Hifumi 34134eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3414a512bbf8SYan Zheng lock_buffer(bh); 3415a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3416442a4f63SStefan Behrens bh->b_private = device; 3417a512bbf8SYan Zheng } 3418a512bbf8SYan Zheng 3419387125fcSChris Mason /* 3420387125fcSChris Mason * we fua the first super. The others we allow 3421387125fcSChris Mason * to go down lazy. 3422387125fcSChris Mason */ 3423e8117c26SWang Shilong if (i == 0) 342421adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 3425e8117c26SWang Shilong else 3426e8117c26SWang Shilong ret = btrfsic_submit_bh(WRITE_SYNC, bh); 34274eedeb75SHisashi Hifumi if (ret) 3428a512bbf8SYan Zheng errors++; 3429a512bbf8SYan Zheng } 3430a512bbf8SYan Zheng return errors < i ? 0 : -1; 3431a512bbf8SYan Zheng } 3432a512bbf8SYan Zheng 3433387125fcSChris Mason /* 3434387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3435387125fcSChris Mason * for the barrier when it is done 3436387125fcSChris Mason */ 34374246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3438387125fcSChris Mason { 3439387125fcSChris Mason if (bio->bi_private) 3440387125fcSChris Mason complete(bio->bi_private); 3441387125fcSChris Mason bio_put(bio); 3442387125fcSChris Mason } 3443387125fcSChris Mason 3444387125fcSChris Mason /* 3445387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 3446387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 3447387125fcSChris Mason * 3448387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 3449387125fcSChris Mason * capable 3450387125fcSChris Mason */ 3451387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 3452387125fcSChris Mason { 3453387125fcSChris Mason struct bio *bio; 3454387125fcSChris Mason int ret = 0; 3455387125fcSChris Mason 3456387125fcSChris Mason if (device->nobarriers) 3457387125fcSChris Mason return 0; 3458387125fcSChris Mason 3459387125fcSChris Mason if (wait) { 3460387125fcSChris Mason bio = device->flush_bio; 3461387125fcSChris Mason if (!bio) 3462387125fcSChris Mason return 0; 3463387125fcSChris Mason 3464387125fcSChris Mason wait_for_completion(&device->flush_wait); 3465387125fcSChris Mason 34664246a0b6SChristoph Hellwig if (bio->bi_error) { 34674246a0b6SChristoph Hellwig ret = bio->bi_error; 3468442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 3469442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 3470387125fcSChris Mason } 3471387125fcSChris Mason 3472387125fcSChris Mason /* drop the reference from the wait == 0 run */ 3473387125fcSChris Mason bio_put(bio); 3474387125fcSChris Mason device->flush_bio = NULL; 3475387125fcSChris Mason 3476387125fcSChris Mason return ret; 3477387125fcSChris Mason } 3478387125fcSChris Mason 3479387125fcSChris Mason /* 3480387125fcSChris Mason * one reference for us, and we leave it for the 3481387125fcSChris Mason * caller 3482387125fcSChris Mason */ 34839c017abcSJesper Juhl device->flush_bio = NULL; 34849be3395bSChris Mason bio = btrfs_io_bio_alloc(GFP_NOFS, 0); 3485387125fcSChris Mason if (!bio) 3486387125fcSChris Mason return -ENOMEM; 3487387125fcSChris Mason 3488387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3489387125fcSChris Mason bio->bi_bdev = device->bdev; 3490387125fcSChris Mason init_completion(&device->flush_wait); 3491387125fcSChris Mason bio->bi_private = &device->flush_wait; 3492387125fcSChris Mason device->flush_bio = bio; 3493387125fcSChris Mason 3494387125fcSChris Mason bio_get(bio); 349521adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 3496387125fcSChris Mason 3497387125fcSChris Mason return 0; 3498387125fcSChris Mason } 3499387125fcSChris Mason 3500387125fcSChris Mason /* 3501387125fcSChris Mason * send an empty flush down to each device in parallel, 3502387125fcSChris Mason * then wait for them 3503387125fcSChris Mason */ 3504387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3505387125fcSChris Mason { 3506387125fcSChris Mason struct list_head *head; 3507387125fcSChris Mason struct btrfs_device *dev; 35085af3e8ccSStefan Behrens int errors_send = 0; 35095af3e8ccSStefan Behrens int errors_wait = 0; 3510387125fcSChris Mason int ret; 3511387125fcSChris Mason 3512387125fcSChris Mason /* send down all the barriers */ 3513387125fcSChris Mason head = &info->fs_devices->devices; 3514387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3515f88ba6a2SHidetoshi Seto if (dev->missing) 3516f88ba6a2SHidetoshi Seto continue; 3517387125fcSChris Mason if (!dev->bdev) { 35185af3e8ccSStefan Behrens errors_send++; 3519387125fcSChris Mason continue; 3520387125fcSChris Mason } 3521387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3522387125fcSChris Mason continue; 3523387125fcSChris Mason 3524387125fcSChris Mason ret = write_dev_flush(dev, 0); 3525387125fcSChris Mason if (ret) 35265af3e8ccSStefan Behrens errors_send++; 3527387125fcSChris Mason } 3528387125fcSChris Mason 3529387125fcSChris Mason /* wait for all the barriers */ 3530387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3531f88ba6a2SHidetoshi Seto if (dev->missing) 3532f88ba6a2SHidetoshi Seto continue; 3533387125fcSChris Mason if (!dev->bdev) { 35345af3e8ccSStefan Behrens errors_wait++; 3535387125fcSChris Mason continue; 3536387125fcSChris Mason } 3537387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3538387125fcSChris Mason continue; 3539387125fcSChris Mason 3540387125fcSChris Mason ret = write_dev_flush(dev, 1); 3541387125fcSChris Mason if (ret) 35425af3e8ccSStefan Behrens errors_wait++; 3543387125fcSChris Mason } 35445af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 35455af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3546387125fcSChris Mason return -EIO; 3547387125fcSChris Mason return 0; 3548387125fcSChris Mason } 3549387125fcSChris Mason 3550943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3551943c6e99SZhao Lei { 35528789f4feSZhao Lei int raid_type; 35538789f4feSZhao Lei int min_tolerated = INT_MAX; 3554943c6e99SZhao Lei 35558789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 35568789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 35578789f4feSZhao Lei min_tolerated = min(min_tolerated, 35588789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 35598789f4feSZhao Lei tolerated_failures); 3560943c6e99SZhao Lei 35618789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 35628789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 35638789f4feSZhao Lei continue; 35648789f4feSZhao Lei if (!(flags & btrfs_raid_group[raid_type])) 35658789f4feSZhao Lei continue; 35668789f4feSZhao Lei min_tolerated = min(min_tolerated, 35678789f4feSZhao Lei btrfs_raid_array[raid_type]. 35688789f4feSZhao Lei tolerated_failures); 35698789f4feSZhao Lei } 3570943c6e99SZhao Lei 35718789f4feSZhao Lei if (min_tolerated == INT_MAX) { 35728789f4feSZhao Lei pr_warn("BTRFS: unknown raid flag: %llu\n", flags); 35738789f4feSZhao Lei min_tolerated = 0; 35748789f4feSZhao Lei } 35758789f4feSZhao Lei 35768789f4feSZhao Lei return min_tolerated; 3577943c6e99SZhao Lei } 3578943c6e99SZhao Lei 35795af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 35805af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 35815af3e8ccSStefan Behrens { 35825af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 35835af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 35845af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 35855af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 35865af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 35875af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 35885af3e8ccSStefan Behrens int i; 35895af3e8ccSStefan Behrens int c; 35905af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 35915af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 35925af3e8ccSStefan Behrens 35932c458045SZhao Lei for (i = 0; i < ARRAY_SIZE(types); i++) { 35945af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 35955af3e8ccSStefan Behrens 35965af3e8ccSStefan Behrens sinfo = NULL; 35975af3e8ccSStefan Behrens rcu_read_lock(); 35985af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 35995af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 36005af3e8ccSStefan Behrens sinfo = tmp; 36015af3e8ccSStefan Behrens break; 36025af3e8ccSStefan Behrens } 36035af3e8ccSStefan Behrens } 36045af3e8ccSStefan Behrens rcu_read_unlock(); 36055af3e8ccSStefan Behrens 36065af3e8ccSStefan Behrens if (!sinfo) 36075af3e8ccSStefan Behrens continue; 36085af3e8ccSStefan Behrens 36095af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 36105af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 36115af3e8ccSStefan Behrens u64 flags; 36125af3e8ccSStefan Behrens 36132c458045SZhao Lei if (list_empty(&sinfo->block_groups[c])) 36142c458045SZhao Lei continue; 36152c458045SZhao Lei 36162c458045SZhao Lei btrfs_get_block_group_info(&sinfo->block_groups[c], 36172c458045SZhao Lei &space); 36182c458045SZhao Lei if (space.total_bytes == 0 || space.used_bytes == 0) 36195af3e8ccSStefan Behrens continue; 36205af3e8ccSStefan Behrens flags = space.flags; 3621943c6e99SZhao Lei 3622943c6e99SZhao Lei num_tolerated_disk_barrier_failures = min( 3623943c6e99SZhao Lei num_tolerated_disk_barrier_failures, 3624943c6e99SZhao Lei btrfs_get_num_tolerated_disk_barrier_failures( 3625943c6e99SZhao Lei flags)); 36265af3e8ccSStefan Behrens } 36275af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 36285af3e8ccSStefan Behrens } 36295af3e8ccSStefan Behrens 36305af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 36315af3e8ccSStefan Behrens } 36325af3e8ccSStefan Behrens 363348a3b636SEric Sandeen static int write_all_supers(struct btrfs_root *root, int max_mirrors) 3634f2984462SChris Mason { 3635e5e9a520SChris Mason struct list_head *head; 3636f2984462SChris Mason struct btrfs_device *dev; 3637a061fc8dSChris Mason struct btrfs_super_block *sb; 3638f2984462SChris Mason struct btrfs_dev_item *dev_item; 3639f2984462SChris Mason int ret; 3640f2984462SChris Mason int do_barriers; 3641a236aed1SChris Mason int max_errors; 3642a236aed1SChris Mason int total_errors = 0; 3643a061fc8dSChris Mason u64 flags; 3644f2984462SChris Mason 3645f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3646af31f5e5SChris Mason backup_super_roots(root->fs_info); 3647f2984462SChris Mason 36486c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3649a061fc8dSChris Mason dev_item = &sb->dev_item; 3650e5e9a520SChris Mason 3651174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3652e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3653d7306801SFilipe David Borba Manana max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3654387125fcSChris Mason 36555af3e8ccSStefan Behrens if (do_barriers) { 36565af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 36575af3e8ccSStefan Behrens if (ret) { 36585af3e8ccSStefan Behrens mutex_unlock( 36595af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 366034d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, ret, 36615af3e8ccSStefan Behrens "errors while submitting device barriers."); 36625af3e8ccSStefan Behrens return ret; 36635af3e8ccSStefan Behrens } 36645af3e8ccSStefan Behrens } 3665387125fcSChris Mason 36661f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3667dfe25020SChris Mason if (!dev->bdev) { 3668dfe25020SChris Mason total_errors++; 3669dfe25020SChris Mason continue; 3670dfe25020SChris Mason } 36712b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3672dfe25020SChris Mason continue; 3673dfe25020SChris Mason 36742b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3675a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3676a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 36777df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3678935e5cc9SMiao Xie dev->commit_total_bytes); 3679ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3680ce7213c7SMiao Xie dev->commit_bytes_used); 3681a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3682a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3683a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3684a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 36852b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3686a512bbf8SYan Zheng 3687a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3688a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3689f2984462SChris Mason 3690a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3691a236aed1SChris Mason if (ret) 3692a236aed1SChris Mason total_errors++; 3693f2984462SChris Mason } 3694a236aed1SChris Mason if (total_errors > max_errors) { 3695efe120a0SFrank Holton btrfs_err(root->fs_info, "%d errors while writing supers", 3696d397712bSChris Mason total_errors); 3697a724b436SStefan Behrens mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 369879787eaaSJeff Mahoney 36999d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 370034d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, -EIO, 37019d565ba4SStefan Behrens "%d errors while writing supers", total_errors); 37029d565ba4SStefan Behrens return -EIO; 3703a236aed1SChris Mason } 3704f2984462SChris Mason 3705a512bbf8SYan Zheng total_errors = 0; 37061f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3707dfe25020SChris Mason if (!dev->bdev) 3708dfe25020SChris Mason continue; 37092b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3710dfe25020SChris Mason continue; 3711dfe25020SChris Mason 3712a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3713a512bbf8SYan Zheng if (ret) 37141259ab75SChris Mason total_errors++; 3715f2984462SChris Mason } 3716174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3717a236aed1SChris Mason if (total_errors > max_errors) { 371834d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, -EIO, 371979787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 372079787eaaSJeff Mahoney return -EIO; 3721a236aed1SChris Mason } 3722f2984462SChris Mason return 0; 3723f2984462SChris Mason } 3724f2984462SChris Mason 3725a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3726a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3727cfaa7295SChris Mason { 3728f570e757SRashika return write_all_supers(root, max_mirrors); 3729cfaa7295SChris Mason } 3730cfaa7295SChris Mason 3731cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3732cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3733cb517eabSMiao Xie struct btrfs_root *root) 37342619ba1fSChris Mason { 37354df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 37362619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 37372619ba1fSChris Mason (unsigned long)root->root_key.objectid); 37384df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 373976dda93cSYan, Zheng 374076dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 374176dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 374276dda93cSYan, Zheng 37431a4319ccSLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 37443321719eSLiu Bo btrfs_free_log(NULL, root); 37453321719eSLiu Bo 3746faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3747581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3748faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3749581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 37504df27c4dSYan, Zheng free_fs_root(root); 37514df27c4dSYan, Zheng } 37524df27c4dSYan, Zheng 37534df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 37544df27c4dSYan, Zheng { 375557cdc8dbSDavid Sterba iput(root->ino_cache_inode); 37564df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 37571cb048f5SFilipe David Borba Manana btrfs_free_block_rsv(root, root->orphan_block_rsv); 37581cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 37590ee5dc67SAl Viro if (root->anon_dev) 37600ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 37618257b2dcSMiao Xie if (root->subv_writers) 37628257b2dcSMiao Xie btrfs_free_subvolume_writers(root->subv_writers); 37635f39d397SChris Mason free_extent_buffer(root->node); 37645f39d397SChris Mason free_extent_buffer(root->commit_root); 3765581bb050SLi Zefan kfree(root->free_ino_ctl); 3766581bb050SLi Zefan kfree(root->free_ino_pinned); 376758176a96SJosef Bacik kfree(root->name); 3768b0feb9d9SMiao Xie btrfs_put_fs_root(root); 37692619ba1fSChris Mason } 37702619ba1fSChris Mason 3771cb517eabSMiao Xie void btrfs_free_fs_root(struct btrfs_root *root) 3772cb517eabSMiao Xie { 3773cb517eabSMiao Xie free_fs_root(root); 3774eb60ceacSChris Mason } 3775eb60ceacSChris Mason 3776c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3777c146afadSYan Zheng { 3778c146afadSYan Zheng u64 root_objectid = 0; 3779c146afadSYan Zheng struct btrfs_root *gang[8]; 378065d33fd7SQu Wenruo int i = 0; 378165d33fd7SQu Wenruo int err = 0; 378265d33fd7SQu Wenruo unsigned int ret = 0; 378365d33fd7SQu Wenruo int index; 3784c146afadSYan Zheng 3785c146afadSYan Zheng while (1) { 378665d33fd7SQu Wenruo index = srcu_read_lock(&fs_info->subvol_srcu); 3787c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3788c146afadSYan Zheng (void **)gang, root_objectid, 3789c146afadSYan Zheng ARRAY_SIZE(gang)); 379065d33fd7SQu Wenruo if (!ret) { 379165d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 3792c146afadSYan Zheng break; 379365d33fd7SQu Wenruo } 37945d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 379566b4ffd1SJosef Bacik 379665d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 379765d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 379865d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 379965d33fd7SQu Wenruo gang[i] = NULL; 380065d33fd7SQu Wenruo continue; 380165d33fd7SQu Wenruo } 380265d33fd7SQu Wenruo /* grab all the search result for later use */ 380365d33fd7SQu Wenruo gang[i] = btrfs_grab_fs_root(gang[i]); 380465d33fd7SQu Wenruo } 380565d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 380665d33fd7SQu Wenruo 380765d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 380865d33fd7SQu Wenruo if (!gang[i]) 380965d33fd7SQu Wenruo continue; 3810c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 381166b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 381266b4ffd1SJosef Bacik if (err) 381365d33fd7SQu Wenruo break; 381465d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 3815c146afadSYan Zheng } 3816c146afadSYan Zheng root_objectid++; 3817c146afadSYan Zheng } 381865d33fd7SQu Wenruo 381965d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 382065d33fd7SQu Wenruo for (; i < ret; i++) { 382165d33fd7SQu Wenruo if (gang[i]) 382265d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 382365d33fd7SQu Wenruo } 382465d33fd7SQu Wenruo return err; 3825c146afadSYan Zheng } 3826c146afadSYan Zheng 3827c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3828c146afadSYan Zheng { 3829c146afadSYan Zheng struct btrfs_trans_handle *trans; 3830c146afadSYan Zheng 3831c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 383224bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3833c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 38349d1a2a3aSDavid Sterba wake_up_process(root->fs_info->cleaner_kthread); 3835c71bf099SYan, Zheng 3836c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3837c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3838c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3839c71bf099SYan, Zheng 38407a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 38413612b495STsutomu Itoh if (IS_ERR(trans)) 38423612b495STsutomu Itoh return PTR_ERR(trans); 3843d52c1bccSLiu Bo return btrfs_commit_transaction(trans, root); 3844c146afadSYan Zheng } 3845c146afadSYan Zheng 38463abdbd78SDavid Sterba void close_ctree(struct btrfs_root *root) 3847eb60ceacSChris Mason { 38480f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3849c146afadSYan Zheng int ret; 3850e089f05cSChris Mason 3851facda1e7SChris Mason fs_info->closing = 1; 3852a2135011SChris Mason smp_mb(); 3853a2135011SChris Mason 38547343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 38557343dd61SJustin Maggard btrfs_qgroup_wait_for_completion(fs_info); 38567343dd61SJustin Maggard 3857803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 3858803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 3859803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 3860803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 3861803b2f54SStefan Behrens 3862837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3863aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3864837d5b6eSIlya Dryomov 38658dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 38668dabb742SStefan Behrens 3867aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 38684cb5300bSChris Mason 38694cb5300bSChris Mason /* wait for any defraggers to finish */ 38704cb5300bSChris Mason wait_event(fs_info->transaction_wait, 38714cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 38724cb5300bSChris Mason 38734cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 387426176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 38754cb5300bSChris Mason 387621c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 387721c7e756SMiao Xie 3878c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3879e44163e1SJeff Mahoney /* 3880e44163e1SJeff Mahoney * If the cleaner thread is stopped and there are 3881e44163e1SJeff Mahoney * block groups queued for removal, the deletion will be 3882e44163e1SJeff Mahoney * skipped when we quit the cleaner thread. 3883e44163e1SJeff Mahoney */ 3884e44163e1SJeff Mahoney btrfs_delete_unused_bgs(root->fs_info); 3885e44163e1SJeff Mahoney 3886c146afadSYan Zheng ret = btrfs_commit_super(root); 3887d397712bSChris Mason if (ret) 388804892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 3889c146afadSYan Zheng } 3890ed2ff2cbSChris Mason 389187533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 389268ce9682SStefan Behrens btrfs_error_commit_super(root); 3893acce952bSliubo 3894e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3895e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 38968929ecfaSYan, Zheng 3897f25784b3SYan Zheng fs_info->closing = 2; 3898f25784b3SYan Zheng smp_mb(); 3899f25784b3SYan Zheng 390004892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 3901bcef60f2SArne Jansen 3902963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 390304892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 3904963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3905b0c68f8bSChris Mason } 390631153d81SYan Zheng 39076618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 3908b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 39095ac1d209SJeff Mahoney 3910faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 3911d10c5f31SChris Mason 39121a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 39131a4319ccSLiu Bo 39142b1360daSJosef Bacik btrfs_free_block_groups(fs_info); 39152b1360daSJosef Bacik 3916de348ee0SWang Shilong /* 3917de348ee0SWang Shilong * we must make sure there is not any read request to 3918de348ee0SWang Shilong * submit after we stopping all workers. 3919de348ee0SWang Shilong */ 3920de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 392196192499SJosef Bacik btrfs_stop_all_workers(fs_info); 392296192499SJosef Bacik 392347ab2a6cSJosef Bacik fs_info->open = 0; 392413e6c37bSJosef Bacik free_root_pointers(fs_info, 1); 39259ad6b7bcSChris Mason 392613e6c37bSJosef Bacik iput(fs_info->btree_inode); 3927d6bfde87SChris Mason 392821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 392921adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 393021adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 393121adbd5cSStefan Behrens #endif 393221adbd5cSStefan Behrens 3933dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 39340b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3935b248a415SChris Mason 3936e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3937963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3938c404e0dcSMiao Xie percpu_counter_destroy(&fs_info->bio_counter); 393904160088SChris Mason bdi_destroy(&fs_info->bdi); 394076dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 39410b86a832SChris Mason 394253b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 394353b381b3SDavid Woodhouse 3944cdfb080eSChris Mason __btrfs_free_block_rsv(root->orphan_block_rsv); 39451cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 394604216820SFilipe Manana 394704216820SFilipe Manana lock_chunks(root); 394804216820SFilipe Manana while (!list_empty(&fs_info->pinned_chunks)) { 394904216820SFilipe Manana struct extent_map *em; 395004216820SFilipe Manana 395104216820SFilipe Manana em = list_first_entry(&fs_info->pinned_chunks, 395204216820SFilipe Manana struct extent_map, list); 395304216820SFilipe Manana list_del_init(&em->list); 395404216820SFilipe Manana free_extent_map(em); 395504216820SFilipe Manana } 395604216820SFilipe Manana unlock_chunks(root); 3957eb60ceacSChris Mason } 3958eb60ceacSChris Mason 3959b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3960b9fab919SChris Mason int atomic) 3961ccd467d6SChris Mason { 39621259ab75SChris Mason int ret; 3963727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 39641259ab75SChris Mason 39650b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 39661259ab75SChris Mason if (!ret) 39671259ab75SChris Mason return ret; 39681259ab75SChris Mason 39691259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3970b9fab919SChris Mason parent_transid, atomic); 3971b9fab919SChris Mason if (ret == -EAGAIN) 3972b9fab919SChris Mason return ret; 39731259ab75SChris Mason return !ret; 39745f39d397SChris Mason } 39756702ed49SChris Mason 39765f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 39775f39d397SChris Mason { 397806ea65a3SJosef Bacik struct btrfs_root *root; 39795f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3980b9473439SChris Mason int was_dirty; 3981b4ce94deSChris Mason 398206ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 398306ea65a3SJosef Bacik /* 398406ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 398506ea65a3SJosef Bacik * enabled. Normal people shouldn't be marking dummy buffers as dirty 398606ea65a3SJosef Bacik * outside of the sanity tests. 398706ea65a3SJosef Bacik */ 398806ea65a3SJosef Bacik if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) 398906ea65a3SJosef Bacik return; 399006ea65a3SJosef Bacik #endif 399106ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 3992b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 399331b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 399431b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3995d397712bSChris Mason "found %llu running %llu\n", 3996c1c9ff7cSGeert Uytterhoeven buf->start, transid, root->fs_info->generation); 39970b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3998e2d84521SMiao Xie if (!was_dirty) 3999e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 4000e2d84521SMiao Xie buf->len, 4001e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 40021f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 40031f21ef0aSFilipe Manana if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { 40041f21ef0aSFilipe Manana btrfs_print_leaf(root, buf); 40051f21ef0aSFilipe Manana ASSERT(0); 40061f21ef0aSFilipe Manana } 40071f21ef0aSFilipe Manana #endif 4008eb60ceacSChris Mason } 4009eb60ceacSChris Mason 4010b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 4011b53d3f5dSLiu Bo int flush_delayed) 401235b7e476SChris Mason { 4013188de649SChris Mason /* 4014188de649SChris Mason * looks as though older kernels can get into trouble with 4015188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4016188de649SChris Mason */ 4017e2d84521SMiao Xie int ret; 4018d6bfde87SChris Mason 40196933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4020d6bfde87SChris Mason return; 4021d6bfde87SChris Mason 4022b53d3f5dSLiu Bo if (flush_delayed) 402316cdcec7SMiao Xie btrfs_balance_delayed_items(root); 402416cdcec7SMiao Xie 4025e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 4026e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 4027e2d84521SMiao Xie if (ret > 0) { 4028d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 4029d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 403016cdcec7SMiao Xie } 403116cdcec7SMiao Xie } 403216cdcec7SMiao Xie 4033b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 403416cdcec7SMiao Xie { 4035b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 403635b7e476SChris Mason } 4037b53d3f5dSLiu Bo 4038b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 4039b53d3f5dSLiu Bo { 4040b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 4041d6bfde87SChris Mason } 40426b80053dSChris Mason 4043ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 40446b80053dSChris Mason { 4045727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 40460b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 40476b80053dSChris Mason } 40480da5468fSChris Mason 4049fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 4050acce952bSliubo int read_only) 4051acce952bSliubo { 4052c926093eSDavid Sterba struct btrfs_super_block *sb = fs_info->super_copy; 4053319e4d06SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 4054319e4d06SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 4055c926093eSDavid Sterba int ret = 0; 4056c926093eSDavid Sterba 4057319e4d06SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 4058319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: no valid FS found\n"); 4059319e4d06SQu Wenruo ret = -EINVAL; 4060319e4d06SQu Wenruo } 4061319e4d06SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) 4062319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: unrecognized super flag: %llu\n", 4063319e4d06SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 406421e7626bSDavid Sterba if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 406521e7626bSDavid Sterba printk(KERN_ERR "BTRFS: tree_root level too big: %d >= %d\n", 406621e7626bSDavid Sterba btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 4067c926093eSDavid Sterba ret = -EINVAL; 4068c926093eSDavid Sterba } 406921e7626bSDavid Sterba if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 407021e7626bSDavid Sterba printk(KERN_ERR "BTRFS: chunk_root level too big: %d >= %d\n", 407121e7626bSDavid Sterba btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 4072c926093eSDavid Sterba ret = -EINVAL; 4073c926093eSDavid Sterba } 407421e7626bSDavid Sterba if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 407521e7626bSDavid Sterba printk(KERN_ERR "BTRFS: log_root level too big: %d >= %d\n", 407621e7626bSDavid Sterba btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 4077c926093eSDavid Sterba ret = -EINVAL; 4078c926093eSDavid Sterba } 4079c926093eSDavid Sterba 40801104a885SDavid Sterba /* 4081319e4d06SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 4082319e4d06SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 40831104a885SDavid Sterba */ 4084319e4d06SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 4085319e4d06SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 4086319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize); 408775d6ad38SDavid Sterba ret = -EINVAL; 408875d6ad38SDavid Sterba } 4089319e4d06SQu Wenruo /* Only PAGE SIZE is supported yet */ 409009cbfeafSKirill A. Shutemov if (sectorsize != PAGE_SIZE) { 4091319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n", 409209cbfeafSKirill A. Shutemov sectorsize, PAGE_SIZE); 4093319e4d06SQu Wenruo ret = -EINVAL; 4094319e4d06SQu Wenruo } 4095319e4d06SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 4096319e4d06SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 4097319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize); 4098319e4d06SQu Wenruo ret = -EINVAL; 4099319e4d06SQu Wenruo } 4100319e4d06SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 4101319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: invalid leafsize %u, should be %llu\n", 4102319e4d06SQu Wenruo le32_to_cpu(sb->__unused_leafsize), 4103319e4d06SQu Wenruo nodesize); 4104319e4d06SQu Wenruo ret = -EINVAL; 4105319e4d06SQu Wenruo } 4106319e4d06SQu Wenruo 4107319e4d06SQu Wenruo /* Root alignment check */ 4108319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 4109319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n", 4110319e4d06SQu Wenruo btrfs_super_root(sb)); 4111319e4d06SQu Wenruo ret = -EINVAL; 4112319e4d06SQu Wenruo } 4113319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 4114319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: chunk_root block unaligned: %llu\n", 4115319e4d06SQu Wenruo btrfs_super_chunk_root(sb)); 4116319e4d06SQu Wenruo ret = -EINVAL; 4117319e4d06SQu Wenruo } 4118319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 4119319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n", 4120319e4d06SQu Wenruo btrfs_super_log_root(sb)); 412175d6ad38SDavid Sterba ret = -EINVAL; 412275d6ad38SDavid Sterba } 412375d6ad38SDavid Sterba 4124c926093eSDavid Sterba if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { 4125c926093eSDavid Sterba printk(KERN_ERR "BTRFS: dev_item UUID does not match fsid: %pU != %pU\n", 4126c926093eSDavid Sterba fs_info->fsid, sb->dev_item.fsid); 4127c926093eSDavid Sterba ret = -EINVAL; 4128c926093eSDavid Sterba } 4129c926093eSDavid Sterba 4130c926093eSDavid Sterba /* 4131c926093eSDavid Sterba * Hint to catch really bogus numbers, bitflips or so, more exact checks are 4132c926093eSDavid Sterba * done later 4133c926093eSDavid Sterba */ 413499e3ecfcSLiu Bo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 413599e3ecfcSLiu Bo btrfs_err(fs_info, "bytes_used is too small %llu", 413699e3ecfcSLiu Bo btrfs_super_bytes_used(sb)); 413799e3ecfcSLiu Bo ret = -EINVAL; 413899e3ecfcSLiu Bo } 4139b7f67055SChandan Rajendra if (!is_power_of_2(btrfs_super_stripesize(sb))) { 414099e3ecfcSLiu Bo btrfs_err(fs_info, "invalid stripesize %u", 414199e3ecfcSLiu Bo btrfs_super_stripesize(sb)); 414299e3ecfcSLiu Bo ret = -EINVAL; 414399e3ecfcSLiu Bo } 414421e7626bSDavid Sterba if (btrfs_super_num_devices(sb) > (1UL << 31)) 4145c926093eSDavid Sterba printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n", 414621e7626bSDavid Sterba btrfs_super_num_devices(sb)); 414775d6ad38SDavid Sterba if (btrfs_super_num_devices(sb) == 0) { 414875d6ad38SDavid Sterba printk(KERN_ERR "BTRFS: number of devices is 0\n"); 414975d6ad38SDavid Sterba ret = -EINVAL; 415075d6ad38SDavid Sterba } 4151c926093eSDavid Sterba 415221e7626bSDavid Sterba if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) { 4153c926093eSDavid Sterba printk(KERN_ERR "BTRFS: super offset mismatch %llu != %u\n", 415421e7626bSDavid Sterba btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 4155c926093eSDavid Sterba ret = -EINVAL; 4156c926093eSDavid Sterba } 4157c926093eSDavid Sterba 4158c926093eSDavid Sterba /* 4159ce7fca5fSDavid Sterba * Obvious sys_chunk_array corruptions, it must hold at least one key 4160ce7fca5fSDavid Sterba * and one chunk 4161ce7fca5fSDavid Sterba */ 4162ce7fca5fSDavid Sterba if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 4163ce7fca5fSDavid Sterba printk(KERN_ERR "BTRFS: system chunk array too big %u > %u\n", 4164ce7fca5fSDavid Sterba btrfs_super_sys_array_size(sb), 4165ce7fca5fSDavid Sterba BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 4166ce7fca5fSDavid Sterba ret = -EINVAL; 4167ce7fca5fSDavid Sterba } 4168ce7fca5fSDavid Sterba if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 4169ce7fca5fSDavid Sterba + sizeof(struct btrfs_chunk)) { 4170d2207129SFabian Frederick printk(KERN_ERR "BTRFS: system chunk array too small %u < %zu\n", 4171ce7fca5fSDavid Sterba btrfs_super_sys_array_size(sb), 4172ce7fca5fSDavid Sterba sizeof(struct btrfs_disk_key) 4173ce7fca5fSDavid Sterba + sizeof(struct btrfs_chunk)); 4174ce7fca5fSDavid Sterba ret = -EINVAL; 4175ce7fca5fSDavid Sterba } 4176ce7fca5fSDavid Sterba 4177ce7fca5fSDavid Sterba /* 4178c926093eSDavid Sterba * The generation is a global counter, we'll trust it more than the others 4179c926093eSDavid Sterba * but it's still possible that it's the one that's wrong. 4180c926093eSDavid Sterba */ 418121e7626bSDavid Sterba if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 4182c926093eSDavid Sterba printk(KERN_WARNING 4183c926093eSDavid Sterba "BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n", 418421e7626bSDavid Sterba btrfs_super_generation(sb), btrfs_super_chunk_root_generation(sb)); 418521e7626bSDavid Sterba if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 418621e7626bSDavid Sterba && btrfs_super_cache_generation(sb) != (u64)-1) 4187c926093eSDavid Sterba printk(KERN_WARNING 4188c926093eSDavid Sterba "BTRFS: suspicious: generation < cache_generation: %llu < %llu\n", 418921e7626bSDavid Sterba btrfs_super_generation(sb), btrfs_super_cache_generation(sb)); 4190c926093eSDavid Sterba 4191c926093eSDavid Sterba return ret; 4192fcd1f065SDavid Sterba } 4193fcd1f065SDavid Sterba 419448a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root) 4195acce952bSliubo { 4196acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 4197acce952bSliubo btrfs_run_delayed_iputs(root); 4198acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 4199acce952bSliubo 4200acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 4201acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 4202acce952bSliubo 4203acce952bSliubo /* cleanup FS via transaction */ 4204acce952bSliubo btrfs_cleanup_transaction(root); 4205acce952bSliubo } 4206acce952bSliubo 4207143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4208acce952bSliubo { 4209acce952bSliubo struct btrfs_ordered_extent *ordered; 4210acce952bSliubo 4211199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4212779880efSJosef Bacik /* 4213779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4214779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4215779880efSJosef Bacik */ 4216199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4217779880efSJosef Bacik root_extent_list) 4218779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4219199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4220199c2a9cSMiao Xie } 4221199c2a9cSMiao Xie 4222199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4223199c2a9cSMiao Xie { 4224199c2a9cSMiao Xie struct btrfs_root *root; 4225199c2a9cSMiao Xie struct list_head splice; 4226199c2a9cSMiao Xie 4227199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4228199c2a9cSMiao Xie 4229199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4230199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4231199c2a9cSMiao Xie while (!list_empty(&splice)) { 4232199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4233199c2a9cSMiao Xie ordered_root); 42341de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 42351de2cfdeSJosef Bacik &fs_info->ordered_roots); 4236199c2a9cSMiao Xie 42372a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4238199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4239199c2a9cSMiao Xie 42402a85d9caSLiu Bo cond_resched(); 42412a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4242199c2a9cSMiao Xie } 4243199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 4244acce952bSliubo } 4245acce952bSliubo 424635a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 4247acce952bSliubo struct btrfs_root *root) 4248acce952bSliubo { 4249acce952bSliubo struct rb_node *node; 4250acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4251acce952bSliubo struct btrfs_delayed_ref_node *ref; 4252acce952bSliubo int ret = 0; 4253acce952bSliubo 4254acce952bSliubo delayed_refs = &trans->delayed_refs; 4255acce952bSliubo 4256acce952bSliubo spin_lock(&delayed_refs->lock); 4257d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4258cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 4259efe120a0SFrank Holton btrfs_info(root->fs_info, "delayed_refs has NO entry"); 4260acce952bSliubo return ret; 4261acce952bSliubo } 4262acce952bSliubo 4263d7df2c79SJosef Bacik while ((node = rb_first(&delayed_refs->href_root)) != NULL) { 4264d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 4265c6fc2454SQu Wenruo struct btrfs_delayed_ref_node *tmp; 4266e78417d1SJosef Bacik bool pin_bytes = false; 4267acce952bSliubo 4268d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4269d7df2c79SJosef Bacik href_node); 4270b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 4271d7df2c79SJosef Bacik atomic_inc(&head->node.refs); 427279787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 4273b939d1abSJosef Bacik 4274acce952bSliubo mutex_lock(&head->mutex); 4275b939d1abSJosef Bacik mutex_unlock(&head->mutex); 4276d7df2c79SJosef Bacik btrfs_put_delayed_ref(&head->node); 4277e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 4278b939d1abSJosef Bacik continue; 4279b939d1abSJosef Bacik } 4280d7df2c79SJosef Bacik spin_lock(&head->lock); 4281c6fc2454SQu Wenruo list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list, 4282c6fc2454SQu Wenruo list) { 4283d7df2c79SJosef Bacik ref->in_tree = 0; 4284c6fc2454SQu Wenruo list_del(&ref->list); 4285d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4286d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4287d7df2c79SJosef Bacik } 428854067ae9SJosef Bacik if (head->must_insert_reserved) 4289e78417d1SJosef Bacik pin_bytes = true; 429078a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4291acce952bSliubo delayed_refs->num_heads--; 4292d7df2c79SJosef Bacik if (head->processing == 0) 4293acce952bSliubo delayed_refs->num_heads_ready--; 4294d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4295d7df2c79SJosef Bacik head->node.in_tree = 0; 4296c46effa6SLiu Bo rb_erase(&head->href_node, &delayed_refs->href_root); 4297d7df2c79SJosef Bacik spin_unlock(&head->lock); 4298acce952bSliubo spin_unlock(&delayed_refs->lock); 4299e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4300acce952bSliubo 4301d7df2c79SJosef Bacik if (pin_bytes) 4302d7df2c79SJosef Bacik btrfs_pin_extent(root, head->node.bytenr, 4303d7df2c79SJosef Bacik head->node.num_bytes, 1); 4304d7df2c79SJosef Bacik btrfs_put_delayed_ref(&head->node); 4305acce952bSliubo cond_resched(); 4306acce952bSliubo spin_lock(&delayed_refs->lock); 4307acce952bSliubo } 4308acce952bSliubo 4309acce952bSliubo spin_unlock(&delayed_refs->lock); 4310acce952bSliubo 4311acce952bSliubo return ret; 4312acce952bSliubo } 4313acce952bSliubo 4314143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4315acce952bSliubo { 4316acce952bSliubo struct btrfs_inode *btrfs_inode; 4317acce952bSliubo struct list_head splice; 4318acce952bSliubo 4319acce952bSliubo INIT_LIST_HEAD(&splice); 4320acce952bSliubo 4321eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4322eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4323acce952bSliubo 4324acce952bSliubo while (!list_empty(&splice)) { 4325eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4326acce952bSliubo delalloc_inodes); 4327acce952bSliubo 4328acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 4329df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 4330df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 4331eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4332acce952bSliubo 4333acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 4334b216cbfbSMiao Xie 4335eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4336acce952bSliubo } 4337acce952bSliubo 4338eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4339eb73c1b7SMiao Xie } 4340eb73c1b7SMiao Xie 4341eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4342eb73c1b7SMiao Xie { 4343eb73c1b7SMiao Xie struct btrfs_root *root; 4344eb73c1b7SMiao Xie struct list_head splice; 4345eb73c1b7SMiao Xie 4346eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4347eb73c1b7SMiao Xie 4348eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4349eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4350eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4351eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4352eb73c1b7SMiao Xie delalloc_root); 4353eb73c1b7SMiao Xie list_del_init(&root->delalloc_root); 4354eb73c1b7SMiao Xie root = btrfs_grab_fs_root(root); 4355eb73c1b7SMiao Xie BUG_ON(!root); 4356eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4357eb73c1b7SMiao Xie 4358eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 4359eb73c1b7SMiao Xie btrfs_put_fs_root(root); 4360eb73c1b7SMiao Xie 4361eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4362eb73c1b7SMiao Xie } 4363eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4364acce952bSliubo } 4365acce952bSliubo 4366acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 4367acce952bSliubo struct extent_io_tree *dirty_pages, 4368acce952bSliubo int mark) 4369acce952bSliubo { 4370acce952bSliubo int ret; 4371acce952bSliubo struct extent_buffer *eb; 4372acce952bSliubo u64 start = 0; 4373acce952bSliubo u64 end; 4374acce952bSliubo 4375acce952bSliubo while (1) { 4376acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4377e6138876SJosef Bacik mark, NULL); 4378acce952bSliubo if (ret) 4379acce952bSliubo break; 4380acce952bSliubo 438191166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4382acce952bSliubo while (start <= end) { 438301d58472SDaniel Dressler eb = btrfs_find_tree_block(root->fs_info, start); 4384707e8a07SDavid Sterba start += root->nodesize; 4385fd8b2b61SJosef Bacik if (!eb) 4386acce952bSliubo continue; 4387fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4388acce952bSliubo 4389fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4390fd8b2b61SJosef Bacik &eb->bflags)) 4391fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4392fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4393acce952bSliubo } 4394acce952bSliubo } 4395acce952bSliubo 4396acce952bSliubo return ret; 4397acce952bSliubo } 4398acce952bSliubo 4399acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 4400acce952bSliubo struct extent_io_tree *pinned_extents) 4401acce952bSliubo { 4402acce952bSliubo struct extent_io_tree *unpin; 4403acce952bSliubo u64 start; 4404acce952bSliubo u64 end; 4405acce952bSliubo int ret; 4406ed0eaa14SLiu Bo bool loop = true; 4407acce952bSliubo 4408acce952bSliubo unpin = pinned_extents; 4409ed0eaa14SLiu Bo again: 4410acce952bSliubo while (1) { 4411acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 4412e6138876SJosef Bacik EXTENT_DIRTY, NULL); 4413acce952bSliubo if (ret) 4414acce952bSliubo break; 4415acce952bSliubo 4416af6f8f60SDavid Sterba clear_extent_dirty(unpin, start, end); 4417acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 4418acce952bSliubo cond_resched(); 4419acce952bSliubo } 4420acce952bSliubo 4421ed0eaa14SLiu Bo if (loop) { 4422ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 4423ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 4424ed0eaa14SLiu Bo else 4425ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 4426ed0eaa14SLiu Bo loop = false; 4427ed0eaa14SLiu Bo goto again; 4428ed0eaa14SLiu Bo } 4429ed0eaa14SLiu Bo 4430acce952bSliubo return 0; 4431acce952bSliubo } 4432acce952bSliubo 443349b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 443449b25e05SJeff Mahoney struct btrfs_root *root) 443549b25e05SJeff Mahoney { 443649b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 443749b25e05SJeff Mahoney 44384a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 443949b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 444049b25e05SJeff Mahoney 44414a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 444249b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 444349b25e05SJeff Mahoney 444467cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 444567cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 444667cde344SMiao Xie 444749b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 444849b25e05SJeff Mahoney EXTENT_DIRTY); 44496e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 44506e841e32SLiu Bo root->fs_info->pinned_extents); 445149b25e05SJeff Mahoney 44524a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 44534a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 44544a9d8bdeSMiao Xie 445549b25e05SJeff Mahoney /* 445649b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 445749b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 445849b25e05SJeff Mahoney */ 445949b25e05SJeff Mahoney } 446049b25e05SJeff Mahoney 446148a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root) 4462acce952bSliubo { 4463acce952bSliubo struct btrfs_transaction *t; 4464acce952bSliubo 4465acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 4466acce952bSliubo 4467a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4468724e2315SJosef Bacik while (!list_empty(&root->fs_info->trans_list)) { 4469724e2315SJosef Bacik t = list_first_entry(&root->fs_info->trans_list, 4470724e2315SJosef Bacik struct btrfs_transaction, list); 4471724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 4472724e2315SJosef Bacik atomic_inc(&t->use_count); 4473724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4474724e2315SJosef Bacik btrfs_wait_for_commit(root, t->transid); 4475724e2315SJosef Bacik btrfs_put_transaction(t); 4476724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4477724e2315SJosef Bacik continue; 4478724e2315SJosef Bacik } 4479724e2315SJosef Bacik if (t == root->fs_info->running_transaction) { 4480724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 4481724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4482724e2315SJosef Bacik /* 4483724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4484724e2315SJosef Bacik * handle open currently for this transaction. 4485724e2315SJosef Bacik */ 4486724e2315SJosef Bacik wait_event(t->writer_wait, 4487724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4488724e2315SJosef Bacik } else { 4489724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4490724e2315SJosef Bacik } 4491724e2315SJosef Bacik btrfs_cleanup_one_transaction(t, root); 4492724e2315SJosef Bacik 4493724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4494724e2315SJosef Bacik if (t == root->fs_info->running_transaction) 4495ac673879SMiao Xie root->fs_info->running_transaction = NULL; 4496724e2315SJosef Bacik list_del_init(&t->list); 4497a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4498a4abeea4SJosef Bacik 4499724e2315SJosef Bacik btrfs_put_transaction(t); 4500724e2315SJosef Bacik trace_btrfs_transaction_commit(root); 4501724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4502724e2315SJosef Bacik } 4503724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4504199c2a9cSMiao Xie btrfs_destroy_all_ordered_extents(root->fs_info); 450567cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 450667cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 4507724e2315SJosef Bacik btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); 4508eb73c1b7SMiao Xie btrfs_destroy_all_delalloc_inodes(root->fs_info); 4509acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 4510acce952bSliubo 4511acce952bSliubo return 0; 4512acce952bSliubo } 4513acce952bSliubo 4514e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 4515ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 45164bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 45170b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 4518239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 4519239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 45200da5468fSChris Mason }; 4521