16cbd5570SChris Mason /* 26cbd5570SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 36cbd5570SChris Mason * 46cbd5570SChris Mason * This program is free software; you can redistribute it and/or 56cbd5570SChris Mason * modify it under the terms of the GNU General Public 66cbd5570SChris Mason * License v2 as published by the Free Software Foundation. 76cbd5570SChris Mason * 86cbd5570SChris Mason * This program is distributed in the hope that it will be useful, 96cbd5570SChris Mason * but WITHOUT ANY WARRANTY; without even the implied warranty of 106cbd5570SChris Mason * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 116cbd5570SChris Mason * General Public License for more details. 126cbd5570SChris Mason * 136cbd5570SChris Mason * You should have received a copy of the GNU General Public 146cbd5570SChris Mason * License along with this program; if not, write to the 156cbd5570SChris Mason * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 166cbd5570SChris Mason * Boston, MA 021110-1307, USA. 176cbd5570SChris Mason */ 186cbd5570SChris Mason 19e20d96d6SChris Mason #include <linux/fs.h> 20d98237b3SChris Mason #include <linux/blkdev.h> 2187cbda5cSChris Mason #include <linux/scatterlist.h> 2222b0ebdaSChris Mason #include <linux/swap.h> 230f7d52f4SChris Mason #include <linux/radix-tree.h> 2435b7e476SChris Mason #include <linux/writeback.h> 25d397712bSChris Mason #include <linux/buffer_head.h> 26ce9adaa5SChris Mason #include <linux/workqueue.h> 27a74a4b97SChris Mason #include <linux/kthread.h> 285a0e3ad6STejun Heo #include <linux/slab.h> 29784b4e29SChris Mason #include <linux/migrate.h> 307a36ddecSDavid Sterba #include <linux/ratelimit.h> 316463fe58SStefan Behrens #include <linux/uuid.h> 32803b2f54SStefan Behrens #include <linux/semaphore.h> 337e75bf3fSDavid Sterba #include <asm/unaligned.h> 34eb60ceacSChris Mason #include "ctree.h" 35eb60ceacSChris Mason #include "disk-io.h" 360b947affSFilipe David Borba Manana #include "hash.h" 37e089f05cSChris Mason #include "transaction.h" 380f7d52f4SChris Mason #include "btrfs_inode.h" 390b86a832SChris Mason #include "volumes.h" 40db94535dSChris Mason #include "print-tree.h" 41925baeddSChris Mason #include "locking.h" 42e02119d5SChris Mason #include "tree-log.h" 43fa9c0d79SChris Mason #include "free-space-cache.h" 4470f6d82eSOmar Sandoval #include "free-space-tree.h" 45581bb050SLi Zefan #include "inode-map.h" 4621adbd5cSStefan Behrens #include "check-integrity.h" 47606686eeSJosef Bacik #include "rcu-string.h" 488dabb742SStefan Behrens #include "dev-replace.h" 4953b381b3SDavid Woodhouse #include "raid56.h" 505ac1d209SJeff Mahoney #include "sysfs.h" 51fcebe456SJosef Bacik #include "qgroup.h" 52ebb8765bSAnand Jain #include "compression.h" 53eb60ceacSChris Mason 54de0022b9SJosef Bacik #ifdef CONFIG_X86 55de0022b9SJosef Bacik #include <asm/cpufeature.h> 56de0022b9SJosef Bacik #endif 57de0022b9SJosef Bacik 58319e4d06SQu Wenruo #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ 59319e4d06SQu Wenruo BTRFS_HEADER_FLAG_RELOC |\ 60319e4d06SQu Wenruo BTRFS_SUPER_FLAG_ERROR |\ 61319e4d06SQu Wenruo BTRFS_SUPER_FLAG_SEEDING |\ 62319e4d06SQu Wenruo BTRFS_SUPER_FLAG_METADUMP) 63319e4d06SQu Wenruo 64e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops; 658b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 664df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 67fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 68acce952bSliubo int read_only); 69143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 70acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 71acce952bSliubo struct btrfs_root *root); 72143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 73acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 74acce952bSliubo struct extent_io_tree *dirty_pages, 75acce952bSliubo int mark); 76acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 77acce952bSliubo struct extent_io_tree *pinned_extents); 7848a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root); 7948a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root); 80ce9adaa5SChris Mason 81d352ac68SChris Mason /* 8297eb6b69SDavid Sterba * btrfs_end_io_wq structs are used to do processing in task context when an IO 8397eb6b69SDavid Sterba * is complete. This is used during reads to verify checksums, and it is used 84d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 85d352ac68SChris Mason */ 8697eb6b69SDavid Sterba struct btrfs_end_io_wq { 87ce9adaa5SChris Mason struct bio *bio; 88ce9adaa5SChris Mason bio_end_io_t *end_io; 89ce9adaa5SChris Mason void *private; 90ce9adaa5SChris Mason struct btrfs_fs_info *info; 91ce9adaa5SChris Mason int error; 92bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata; 93ce9adaa5SChris Mason struct list_head list; 948b712842SChris Mason struct btrfs_work work; 95ce9adaa5SChris Mason }; 960da5468fSChris Mason 9797eb6b69SDavid Sterba static struct kmem_cache *btrfs_end_io_wq_cache; 9897eb6b69SDavid Sterba 9997eb6b69SDavid Sterba int __init btrfs_end_io_wq_init(void) 10097eb6b69SDavid Sterba { 10197eb6b69SDavid Sterba btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", 10297eb6b69SDavid Sterba sizeof(struct btrfs_end_io_wq), 10397eb6b69SDavid Sterba 0, 104fba4b697SNikolay Borisov SLAB_MEM_SPREAD, 10597eb6b69SDavid Sterba NULL); 10697eb6b69SDavid Sterba if (!btrfs_end_io_wq_cache) 10797eb6b69SDavid Sterba return -ENOMEM; 10897eb6b69SDavid Sterba return 0; 10997eb6b69SDavid Sterba } 11097eb6b69SDavid Sterba 11197eb6b69SDavid Sterba void btrfs_end_io_wq_exit(void) 11297eb6b69SDavid Sterba { 11397eb6b69SDavid Sterba kmem_cache_destroy(btrfs_end_io_wq_cache); 11497eb6b69SDavid Sterba } 11597eb6b69SDavid Sterba 116d352ac68SChris Mason /* 117d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 118d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 119d352ac68SChris Mason * just before they are sent down the IO stack. 120d352ac68SChris Mason */ 12144b8bd7eSChris Mason struct async_submit_bio { 12244b8bd7eSChris Mason struct inode *inode; 12344b8bd7eSChris Mason struct bio *bio; 12444b8bd7eSChris Mason struct list_head list; 1254a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 1264a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 12744b8bd7eSChris Mason int mirror_num; 128c8b97818SChris Mason unsigned long bio_flags; 129eaf25d93SChris Mason /* 130eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 131eaf25d93SChris Mason * can't tell us where in the file the bio should go 132eaf25d93SChris Mason */ 133eaf25d93SChris Mason u64 bio_offset; 1348b712842SChris Mason struct btrfs_work work; 13579787eaaSJeff Mahoney int error; 13644b8bd7eSChris Mason }; 13744b8bd7eSChris Mason 13885d4e461SChris Mason /* 13985d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 14085d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 14185d4e461SChris Mason * the level the eb occupies in the tree. 1424008c04aSChris Mason * 14385d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 14485d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 14585d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 14685d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 14785d4e461SChris Mason * have separate keysets. 1484008c04aSChris Mason * 14985d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 15085d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 15185d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1524008c04aSChris Mason * 15385d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 15485d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 15585d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 15685d4e461SChris Mason * 15785d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 15885d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 15985d4e461SChris Mason * needs update as well. 1604008c04aSChris Mason */ 1614008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1624008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1634008c04aSChris Mason # error 1644008c04aSChris Mason # endif 16585d4e461SChris Mason 16685d4e461SChris Mason static struct btrfs_lockdep_keyset { 16785d4e461SChris Mason u64 id; /* root objectid */ 16885d4e461SChris Mason const char *name_stem; /* lock name stem */ 16985d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 17085d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 17185d4e461SChris Mason } btrfs_lockdep_keysets[] = { 17285d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 17385d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 17485d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 17585d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 17685d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 17785d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 17860b62978SDavid Sterba { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, 17985d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 18085d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 18185d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 18213fd8da9SDavid Sterba { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, 1836b20e0adSDavid Sterba { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, 18485d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1854008c04aSChris Mason }; 18685d4e461SChris Mason 18785d4e461SChris Mason void __init btrfs_init_lockdep(void) 18885d4e461SChris Mason { 18985d4e461SChris Mason int i, j; 19085d4e461SChris Mason 19185d4e461SChris Mason /* initialize lockdep class names */ 19285d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 19385d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 19485d4e461SChris Mason 19585d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 19685d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 19785d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 19885d4e461SChris Mason } 19985d4e461SChris Mason } 20085d4e461SChris Mason 20185d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 20285d4e461SChris Mason int level) 20385d4e461SChris Mason { 20485d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 20585d4e461SChris Mason 20685d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 20785d4e461SChris Mason 20885d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 20985d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 21085d4e461SChris Mason if (ks->id == objectid) 21185d4e461SChris Mason break; 21285d4e461SChris Mason 21385d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 21485d4e461SChris Mason &ks->keys[level], ks->names[level]); 21585d4e461SChris Mason } 21685d4e461SChris Mason 2174008c04aSChris Mason #endif 2184008c04aSChris Mason 219d352ac68SChris Mason /* 220d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 221d352ac68SChris Mason * that covers the entire device 222d352ac68SChris Mason */ 223b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 224306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 2255f39d397SChris Mason int create) 2265f39d397SChris Mason { 2275f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 2285f39d397SChris Mason struct extent_map *em; 2295f39d397SChris Mason int ret; 2305f39d397SChris Mason 231890871beSChris Mason read_lock(&em_tree->lock); 232d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 233a061fc8dSChris Mason if (em) { 234a061fc8dSChris Mason em->bdev = 235a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 236890871beSChris Mason read_unlock(&em_tree->lock); 2375f39d397SChris Mason goto out; 238a061fc8dSChris Mason } 239890871beSChris Mason read_unlock(&em_tree->lock); 2407b13b7b1SChris Mason 241172ddd60SDavid Sterba em = alloc_extent_map(); 2425f39d397SChris Mason if (!em) { 2435f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2445f39d397SChris Mason goto out; 2455f39d397SChris Mason } 2465f39d397SChris Mason em->start = 0; 2470afbaf8cSChris Mason em->len = (u64)-1; 248c8b97818SChris Mason em->block_len = (u64)-1; 2495f39d397SChris Mason em->block_start = 0; 250a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 251d1310b2eSChris Mason 252890871beSChris Mason write_lock(&em_tree->lock); 25309a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2545f39d397SChris Mason if (ret == -EEXIST) { 2555f39d397SChris Mason free_extent_map(em); 2567b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 257b4f359abSTsutomu Itoh if (!em) 2580433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2595f39d397SChris Mason } else if (ret) { 2607b13b7b1SChris Mason free_extent_map(em); 2610433f20dSTsutomu Itoh em = ERR_PTR(ret); 2625f39d397SChris Mason } 263890871beSChris Mason write_unlock(&em_tree->lock); 2647b13b7b1SChris Mason 2655f39d397SChris Mason out: 2665f39d397SChris Mason return em; 2675f39d397SChris Mason } 2685f39d397SChris Mason 269b0496686SLiu Bo u32 btrfs_csum_data(char *data, u32 seed, size_t len) 27019c00ddcSChris Mason { 2710b947affSFilipe David Borba Manana return btrfs_crc32c(seed, data, len); 27219c00ddcSChris Mason } 27319c00ddcSChris Mason 27419c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 27519c00ddcSChris Mason { 2767e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 27719c00ddcSChris Mason } 27819c00ddcSChris Mason 279d352ac68SChris Mason /* 280d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 281d352ac68SChris Mason * into the csum field of the block. 282d352ac68SChris Mason */ 28301d58472SDaniel Dressler static int csum_tree_block(struct btrfs_fs_info *fs_info, 28401d58472SDaniel Dressler struct extent_buffer *buf, 28519c00ddcSChris Mason int verify) 28619c00ddcSChris Mason { 28701d58472SDaniel Dressler u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); 288607d432dSJosef Bacik char *result = NULL; 28919c00ddcSChris Mason unsigned long len; 29019c00ddcSChris Mason unsigned long cur_len; 29119c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 29219c00ddcSChris Mason char *kaddr; 29319c00ddcSChris Mason unsigned long map_start; 29419c00ddcSChris Mason unsigned long map_len; 29519c00ddcSChris Mason int err; 29619c00ddcSChris Mason u32 crc = ~(u32)0; 297607d432dSJosef Bacik unsigned long inline_result; 29819c00ddcSChris Mason 29919c00ddcSChris Mason len = buf->len - offset; 30019c00ddcSChris Mason while (len > 0) { 30119c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 302a6591715SChris Mason &kaddr, &map_start, &map_len); 303d397712bSChris Mason if (err) 3048bd98f0eSAlex Lyakas return err; 30519c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 306b0496686SLiu Bo crc = btrfs_csum_data(kaddr + offset - map_start, 30719c00ddcSChris Mason crc, cur_len); 30819c00ddcSChris Mason len -= cur_len; 30919c00ddcSChris Mason offset += cur_len; 31019c00ddcSChris Mason } 311607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 31231e818feSDavid Sterba result = kzalloc(csum_size, GFP_NOFS); 313607d432dSJosef Bacik if (!result) 3148bd98f0eSAlex Lyakas return -ENOMEM; 315607d432dSJosef Bacik } else { 316607d432dSJosef Bacik result = (char *)&inline_result; 317607d432dSJosef Bacik } 318607d432dSJosef Bacik 31919c00ddcSChris Mason btrfs_csum_final(crc, result); 32019c00ddcSChris Mason 32119c00ddcSChris Mason if (verify) { 322607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 323e4204dedSChris Mason u32 val; 324e4204dedSChris Mason u32 found = 0; 325607d432dSJosef Bacik memcpy(&found, result, csum_size); 326e4204dedSChris Mason 327607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 32894647322SDavid Sterba btrfs_warn_rl(fs_info, 3295d163e0eSJeff Mahoney "%s checksum verify failed on %llu wanted %X found %X level %d", 33001d58472SDaniel Dressler fs_info->sb->s_id, buf->start, 331c1c9ff7cSGeert Uytterhoeven val, found, btrfs_header_level(buf)); 332607d432dSJosef Bacik if (result != (char *)&inline_result) 333607d432dSJosef Bacik kfree(result); 3348bd98f0eSAlex Lyakas return -EUCLEAN; 33519c00ddcSChris Mason } 33619c00ddcSChris Mason } else { 337607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 33819c00ddcSChris Mason } 339607d432dSJosef Bacik if (result != (char *)&inline_result) 340607d432dSJosef Bacik kfree(result); 34119c00ddcSChris Mason return 0; 34219c00ddcSChris Mason } 34319c00ddcSChris Mason 344d352ac68SChris Mason /* 345d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 346d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 347d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 348d352ac68SChris Mason * in the wrong place. 349d352ac68SChris Mason */ 3501259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 351b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 352b9fab919SChris Mason int atomic) 3531259ab75SChris Mason { 3542ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3551259ab75SChris Mason int ret; 3562755a0deSDavid Sterba bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); 3571259ab75SChris Mason 3581259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3591259ab75SChris Mason return 0; 3601259ab75SChris Mason 361b9fab919SChris Mason if (atomic) 362b9fab919SChris Mason return -EAGAIN; 363b9fab919SChris Mason 364a26e8c9fSJosef Bacik if (need_lock) { 365a26e8c9fSJosef Bacik btrfs_tree_read_lock(eb); 366a26e8c9fSJosef Bacik btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); 367a26e8c9fSJosef Bacik } 368a26e8c9fSJosef Bacik 3692ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 370ff13db41SDavid Sterba &cached_state); 3710b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3721259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3731259ab75SChris Mason ret = 0; 3741259ab75SChris Mason goto out; 3751259ab75SChris Mason } 37694647322SDavid Sterba btrfs_err_rl(eb->fs_info, 37794647322SDavid Sterba "parent transid verify failed on %llu wanted %llu found %llu", 37894647322SDavid Sterba eb->start, 37929549aecSWang Shilong parent_transid, btrfs_header_generation(eb)); 3801259ab75SChris Mason ret = 1; 381a26e8c9fSJosef Bacik 382a26e8c9fSJosef Bacik /* 383a26e8c9fSJosef Bacik * Things reading via commit roots that don't have normal protection, 384a26e8c9fSJosef Bacik * like send, can have a really old block in cache that may point at a 38501327610SNicholas D Steeves * block that has been freed and re-allocated. So don't clear uptodate 386a26e8c9fSJosef Bacik * if we find an eb that is under IO (dirty/writeback) because we could 387a26e8c9fSJosef Bacik * end up reading in the stale data and then writing it back out and 388a26e8c9fSJosef Bacik * making everybody very sad. 389a26e8c9fSJosef Bacik */ 390a26e8c9fSJosef Bacik if (!extent_buffer_under_io(eb)) 3910b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 39233958dc6SChris Mason out: 3932ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3942ac55d41SJosef Bacik &cached_state, GFP_NOFS); 395472b909fSJosef Bacik if (need_lock) 396a26e8c9fSJosef Bacik btrfs_tree_read_unlock_blocking(eb); 3971259ab75SChris Mason return ret; 3981259ab75SChris Mason } 3991259ab75SChris Mason 400d352ac68SChris Mason /* 4011104a885SDavid Sterba * Return 0 if the superblock checksum type matches the checksum value of that 4021104a885SDavid Sterba * algorithm. Pass the raw disk superblock data. 4031104a885SDavid Sterba */ 4041104a885SDavid Sterba static int btrfs_check_super_csum(char *raw_disk_sb) 4051104a885SDavid Sterba { 4061104a885SDavid Sterba struct btrfs_super_block *disk_sb = 4071104a885SDavid Sterba (struct btrfs_super_block *)raw_disk_sb; 4081104a885SDavid Sterba u16 csum_type = btrfs_super_csum_type(disk_sb); 4091104a885SDavid Sterba int ret = 0; 4101104a885SDavid Sterba 4111104a885SDavid Sterba if (csum_type == BTRFS_CSUM_TYPE_CRC32) { 4121104a885SDavid Sterba u32 crc = ~(u32)0; 4131104a885SDavid Sterba const int csum_size = sizeof(crc); 4141104a885SDavid Sterba char result[csum_size]; 4151104a885SDavid Sterba 4161104a885SDavid Sterba /* 4171104a885SDavid Sterba * The super_block structure does not span the whole 4181104a885SDavid Sterba * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space 41901327610SNicholas D Steeves * is filled with zeros and is included in the checksum. 4201104a885SDavid Sterba */ 4211104a885SDavid Sterba crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, 4221104a885SDavid Sterba crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); 4231104a885SDavid Sterba btrfs_csum_final(crc, result); 4241104a885SDavid Sterba 4251104a885SDavid Sterba if (memcmp(raw_disk_sb, result, csum_size)) 4261104a885SDavid Sterba ret = 1; 4271104a885SDavid Sterba } 4281104a885SDavid Sterba 4291104a885SDavid Sterba if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { 430efe120a0SFrank Holton printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n", 4311104a885SDavid Sterba csum_type); 4321104a885SDavid Sterba ret = 1; 4331104a885SDavid Sterba } 4341104a885SDavid Sterba 4351104a885SDavid Sterba return ret; 4361104a885SDavid Sterba } 4371104a885SDavid Sterba 4381104a885SDavid Sterba /* 439d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 440d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 441d352ac68SChris Mason */ 442f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 443f188591eSChris Mason struct extent_buffer *eb, 4448436ea91SJosef Bacik u64 parent_transid) 445f188591eSChris Mason { 446f188591eSChris Mason struct extent_io_tree *io_tree; 447ea466794SJosef Bacik int failed = 0; 448f188591eSChris Mason int ret; 449f188591eSChris Mason int num_copies = 0; 450f188591eSChris Mason int mirror_num = 0; 451ea466794SJosef Bacik int failed_mirror = 0; 452f188591eSChris Mason 453a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 454f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 455f188591eSChris Mason while (1) { 4568436ea91SJosef Bacik ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE, 457f188591eSChris Mason btree_get_extent, mirror_num); 458256dd1bbSStefan Behrens if (!ret) { 459256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 460b9fab919SChris Mason parent_transid, 0)) 461ea466794SJosef Bacik break; 462256dd1bbSStefan Behrens else 463256dd1bbSStefan Behrens ret = -EIO; 464256dd1bbSStefan Behrens } 465d397712bSChris Mason 466a826d6dcSJosef Bacik /* 467a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 468a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 469a826d6dcSJosef Bacik * any less wrong. 470a826d6dcSJosef Bacik */ 471a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 472ea466794SJosef Bacik break; 473ea466794SJosef Bacik 4745d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 475f188591eSChris Mason eb->start, eb->len); 4764235298eSChris Mason if (num_copies == 1) 477ea466794SJosef Bacik break; 4784235298eSChris Mason 4795cf1ab56SJosef Bacik if (!failed_mirror) { 4805cf1ab56SJosef Bacik failed = 1; 4815cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4825cf1ab56SJosef Bacik } 4835cf1ab56SJosef Bacik 484f188591eSChris Mason mirror_num++; 485ea466794SJosef Bacik if (mirror_num == failed_mirror) 486ea466794SJosef Bacik mirror_num++; 487ea466794SJosef Bacik 4884235298eSChris Mason if (mirror_num > num_copies) 489ea466794SJosef Bacik break; 490f188591eSChris Mason } 491ea466794SJosef Bacik 492c0901581SStefan Behrens if (failed && !ret && failed_mirror) 493ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 494ea466794SJosef Bacik 495ea466794SJosef Bacik return ret; 496f188591eSChris Mason } 49719c00ddcSChris Mason 498d352ac68SChris Mason /* 499d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 500d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 501d352ac68SChris Mason */ 502d397712bSChris Mason 50301d58472SDaniel Dressler static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) 50419c00ddcSChris Mason { 5054eee4fa4SMiao Xie u64 start = page_offset(page); 50619c00ddcSChris Mason u64 found_start; 50719c00ddcSChris Mason struct extent_buffer *eb; 508f188591eSChris Mason 5094f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 5104f2de97aSJosef Bacik if (page != eb->pages[0]) 5114f2de97aSJosef Bacik return 0; 5120f805531SAlex Lyakas 51319c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 5140f805531SAlex Lyakas /* 5150f805531SAlex Lyakas * Please do not consolidate these warnings into a single if. 5160f805531SAlex Lyakas * It is useful to know what went wrong. 5170f805531SAlex Lyakas */ 5180f805531SAlex Lyakas if (WARN_ON(found_start != start)) 5190f805531SAlex Lyakas return -EUCLEAN; 5200f805531SAlex Lyakas if (WARN_ON(!PageUptodate(page))) 5210f805531SAlex Lyakas return -EUCLEAN; 5220f805531SAlex Lyakas 5230f805531SAlex Lyakas ASSERT(memcmp_extent_buffer(eb, fs_info->fsid, 5240f805531SAlex Lyakas btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); 5250f805531SAlex Lyakas 5268bd98f0eSAlex Lyakas return csum_tree_block(fs_info, eb, 0); 52719c00ddcSChris Mason } 52819c00ddcSChris Mason 52901d58472SDaniel Dressler static int check_tree_block_fsid(struct btrfs_fs_info *fs_info, 5302b82032cSYan Zheng struct extent_buffer *eb) 5312b82032cSYan Zheng { 53201d58472SDaniel Dressler struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; 5332b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 5342b82032cSYan Zheng int ret = 1; 5352b82032cSYan Zheng 5360a4e5586SRoss Kirk read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); 5372b82032cSYan Zheng while (fs_devices) { 5382b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 5392b82032cSYan Zheng ret = 0; 5402b82032cSYan Zheng break; 5412b82032cSYan Zheng } 5422b82032cSYan Zheng fs_devices = fs_devices->seed; 5432b82032cSYan Zheng } 5442b82032cSYan Zheng return ret; 5452b82032cSYan Zheng } 5462b82032cSYan Zheng 547a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 5486b722c17SLiu Bo btrfs_crit(root->fs_info, "corrupt %s, %s: block=%llu," \ 5496b722c17SLiu Bo " root=%llu, slot=%d", \ 5506b722c17SLiu Bo btrfs_header_level(eb) == 0 ? "leaf" : "node",\ 5516b722c17SLiu Bo reason, btrfs_header_bytenr(eb), root->objectid, slot) 552a826d6dcSJosef Bacik 553a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 554a826d6dcSJosef Bacik struct extent_buffer *leaf) 555a826d6dcSJosef Bacik { 556a826d6dcSJosef Bacik struct btrfs_key key; 557a826d6dcSJosef Bacik struct btrfs_key leaf_key; 558a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 559a826d6dcSJosef Bacik int slot; 560a826d6dcSJosef Bacik 5611ba98d08SLiu Bo if (nritems == 0) { 5621ba98d08SLiu Bo struct btrfs_root *check_root; 5631ba98d08SLiu Bo 5641ba98d08SLiu Bo key.objectid = btrfs_header_owner(leaf); 5651ba98d08SLiu Bo key.type = BTRFS_ROOT_ITEM_KEY; 5661ba98d08SLiu Bo key.offset = (u64)-1; 5671ba98d08SLiu Bo 5681ba98d08SLiu Bo check_root = btrfs_get_fs_root(root->fs_info, &key, false); 5691ba98d08SLiu Bo /* 5701ba98d08SLiu Bo * The only reason we also check NULL here is that during 5711ba98d08SLiu Bo * open_ctree() some roots has not yet been set up. 5721ba98d08SLiu Bo */ 5731ba98d08SLiu Bo if (!IS_ERR_OR_NULL(check_root)) { 5741ba98d08SLiu Bo /* if leaf is the root, then it's fine */ 5751ba98d08SLiu Bo if (leaf->start != 5761ba98d08SLiu Bo btrfs_root_bytenr(&check_root->root_item)) { 5771ba98d08SLiu Bo CORRUPT("non-root leaf's nritems is 0", 5781ba98d08SLiu Bo leaf, root, 0); 5791ba98d08SLiu Bo return -EIO; 5801ba98d08SLiu Bo } 5811ba98d08SLiu Bo } 582a826d6dcSJosef Bacik return 0; 5831ba98d08SLiu Bo } 584a826d6dcSJosef Bacik 585a826d6dcSJosef Bacik /* Check the 0 item */ 586a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 587a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 588a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 589a826d6dcSJosef Bacik return -EIO; 590a826d6dcSJosef Bacik } 591a826d6dcSJosef Bacik 592a826d6dcSJosef Bacik /* 593a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 594a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 595a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 596a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 597a826d6dcSJosef Bacik * offset is correct. 598a826d6dcSJosef Bacik */ 599a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 600a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 601a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 602a826d6dcSJosef Bacik 603a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 604a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 605a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 606a826d6dcSJosef Bacik return -EIO; 607a826d6dcSJosef Bacik } 608a826d6dcSJosef Bacik 609a826d6dcSJosef Bacik /* 610a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 611a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 612a826d6dcSJosef Bacik * front. 613a826d6dcSJosef Bacik */ 614a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 615a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 616a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 617a826d6dcSJosef Bacik return -EIO; 618a826d6dcSJosef Bacik } 619a826d6dcSJosef Bacik 620a826d6dcSJosef Bacik /* 621a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 622a826d6dcSJosef Bacik * just in case all the items are consistent to each other, but 623a826d6dcSJosef Bacik * all point outside of the leaf. 624a826d6dcSJosef Bacik */ 625a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 626a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 627a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 628a826d6dcSJosef Bacik return -EIO; 629a826d6dcSJosef Bacik } 630a826d6dcSJosef Bacik } 631a826d6dcSJosef Bacik 632a826d6dcSJosef Bacik return 0; 633a826d6dcSJosef Bacik } 634a826d6dcSJosef Bacik 635053ab70fSLiu Bo static int check_node(struct btrfs_root *root, struct extent_buffer *node) 636053ab70fSLiu Bo { 637053ab70fSLiu Bo unsigned long nr = btrfs_header_nritems(node); 6386b722c17SLiu Bo struct btrfs_key key, next_key; 6396b722c17SLiu Bo int slot; 6406b722c17SLiu Bo u64 bytenr; 6416b722c17SLiu Bo int ret = 0; 642053ab70fSLiu Bo 643053ab70fSLiu Bo if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) { 644053ab70fSLiu Bo btrfs_crit(root->fs_info, 645053ab70fSLiu Bo "corrupt node: block %llu root %llu nritems %lu", 646053ab70fSLiu Bo node->start, root->objectid, nr); 647053ab70fSLiu Bo return -EIO; 648053ab70fSLiu Bo } 6496b722c17SLiu Bo 6506b722c17SLiu Bo for (slot = 0; slot < nr - 1; slot++) { 6516b722c17SLiu Bo bytenr = btrfs_node_blockptr(node, slot); 6526b722c17SLiu Bo btrfs_node_key_to_cpu(node, &key, slot); 6536b722c17SLiu Bo btrfs_node_key_to_cpu(node, &next_key, slot + 1); 6546b722c17SLiu Bo 6556b722c17SLiu Bo if (!bytenr) { 6566b722c17SLiu Bo CORRUPT("invalid item slot", node, root, slot); 6576b722c17SLiu Bo ret = -EIO; 6586b722c17SLiu Bo goto out; 6596b722c17SLiu Bo } 6606b722c17SLiu Bo 6616b722c17SLiu Bo if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) { 6626b722c17SLiu Bo CORRUPT("bad key order", node, root, slot); 6636b722c17SLiu Bo ret = -EIO; 6646b722c17SLiu Bo goto out; 6656b722c17SLiu Bo } 6666b722c17SLiu Bo } 6676b722c17SLiu Bo out: 6686b722c17SLiu Bo return ret; 669053ab70fSLiu Bo } 670053ab70fSLiu Bo 671facc8a22SMiao Xie static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, 672facc8a22SMiao Xie u64 phy_offset, struct page *page, 673facc8a22SMiao Xie u64 start, u64 end, int mirror) 674ce9adaa5SChris Mason { 675ce9adaa5SChris Mason u64 found_start; 676ce9adaa5SChris Mason int found_level; 677ce9adaa5SChris Mason struct extent_buffer *eb; 678ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 67902873e43SZhao Lei struct btrfs_fs_info *fs_info = root->fs_info; 680f188591eSChris Mason int ret = 0; 681727011e0SChris Mason int reads_done; 682ce9adaa5SChris Mason 683ce9adaa5SChris Mason if (!page->private) 684ce9adaa5SChris Mason goto out; 685d397712bSChris Mason 6864f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 687d397712bSChris Mason 6880b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 6890b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 6900b32f4bbSJosef Bacik */ 6910b32f4bbSJosef Bacik extent_buffer_get(eb); 6920b32f4bbSJosef Bacik 6930b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 694727011e0SChris Mason if (!reads_done) 695727011e0SChris Mason goto err; 696f188591eSChris Mason 6975cf1ab56SJosef Bacik eb->read_mirror = mirror; 698656f30dbSFilipe Manana if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { 699ea466794SJosef Bacik ret = -EIO; 700ea466794SJosef Bacik goto err; 701ea466794SJosef Bacik } 702ea466794SJosef Bacik 703ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 704727011e0SChris Mason if (found_start != eb->start) { 70502873e43SZhao Lei btrfs_err_rl(fs_info, "bad tree block start %llu %llu", 70694647322SDavid Sterba found_start, eb->start); 707f188591eSChris Mason ret = -EIO; 708ce9adaa5SChris Mason goto err; 709ce9adaa5SChris Mason } 71002873e43SZhao Lei if (check_tree_block_fsid(fs_info, eb)) { 71102873e43SZhao Lei btrfs_err_rl(fs_info, "bad fsid on block %llu", 71294647322SDavid Sterba eb->start); 7131259ab75SChris Mason ret = -EIO; 7141259ab75SChris Mason goto err; 7151259ab75SChris Mason } 716ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 7171c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 71802873e43SZhao Lei btrfs_err(fs_info, "bad tree block level %d", 7191c24c3ceSJosef Bacik (int)btrfs_header_level(eb)); 7201c24c3ceSJosef Bacik ret = -EIO; 7211c24c3ceSJosef Bacik goto err; 7221c24c3ceSJosef Bacik } 723ce9adaa5SChris Mason 72485d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 72585d4e461SChris Mason eb, found_level); 7264008c04aSChris Mason 72702873e43SZhao Lei ret = csum_tree_block(fs_info, eb, 1); 7288bd98f0eSAlex Lyakas if (ret) 729a826d6dcSJosef Bacik goto err; 730a826d6dcSJosef Bacik 731a826d6dcSJosef Bacik /* 732a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 733a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 734a826d6dcSJosef Bacik * return -EIO. 735a826d6dcSJosef Bacik */ 736a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 737a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 738a826d6dcSJosef Bacik ret = -EIO; 739a826d6dcSJosef Bacik } 740ce9adaa5SChris Mason 741053ab70fSLiu Bo if (found_level > 0 && check_node(root, eb)) 742053ab70fSLiu Bo ret = -EIO; 743053ab70fSLiu Bo 7440b32f4bbSJosef Bacik if (!ret) 7450b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 746ce9adaa5SChris Mason err: 74779fb65a1SJosef Bacik if (reads_done && 74879fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 74902873e43SZhao Lei btree_readahead_hook(fs_info, eb, eb->start, ret); 7504bb31e92SArne Jansen 75153b381b3SDavid Woodhouse if (ret) { 75253b381b3SDavid Woodhouse /* 75353b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 75453b381b3SDavid Woodhouse * again, we have to make sure it has something 75553b381b3SDavid Woodhouse * to decrement 75653b381b3SDavid Woodhouse */ 75753b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 7580b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 75953b381b3SDavid Woodhouse } 7600b32f4bbSJosef Bacik free_extent_buffer(eb); 761ce9adaa5SChris Mason out: 762f188591eSChris Mason return ret; 763ce9adaa5SChris Mason } 764ce9adaa5SChris Mason 765ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 7664bb31e92SArne Jansen { 7674bb31e92SArne Jansen struct extent_buffer *eb; 7684bb31e92SArne Jansen 7694f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 770656f30dbSFilipe Manana set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); 7715cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 77253b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 773ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 77402873e43SZhao Lei btree_readahead_hook(eb->fs_info, eb, eb->start, -EIO); 7754bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 7764bb31e92SArne Jansen } 7774bb31e92SArne Jansen 7784246a0b6SChristoph Hellwig static void end_workqueue_bio(struct bio *bio) 779ce9adaa5SChris Mason { 78097eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq = bio->bi_private; 781ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 7829e0af237SLiu Bo struct btrfs_workqueue *wq; 7839e0af237SLiu Bo btrfs_work_func_t func; 784ce9adaa5SChris Mason 785ce9adaa5SChris Mason fs_info = end_io_wq->info; 7864246a0b6SChristoph Hellwig end_io_wq->error = bio->bi_error; 787d20f7043SChris Mason 78837226b21SMike Christie if (bio_op(bio) == REQ_OP_WRITE) { 7899e0af237SLiu Bo if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { 7909e0af237SLiu Bo wq = fs_info->endio_meta_write_workers; 7919e0af237SLiu Bo func = btrfs_endio_meta_write_helper; 7929e0af237SLiu Bo } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { 7939e0af237SLiu Bo wq = fs_info->endio_freespace_worker; 7949e0af237SLiu Bo func = btrfs_freespace_write_helper; 7959e0af237SLiu Bo } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { 7969e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 7979e0af237SLiu Bo func = btrfs_endio_raid56_helper; 798d20f7043SChris Mason } else { 7999e0af237SLiu Bo wq = fs_info->endio_write_workers; 8009e0af237SLiu Bo func = btrfs_endio_write_helper; 801d20f7043SChris Mason } 8029e0af237SLiu Bo } else { 8038b110e39SMiao Xie if (unlikely(end_io_wq->metadata == 8048b110e39SMiao Xie BTRFS_WQ_ENDIO_DIO_REPAIR)) { 8058b110e39SMiao Xie wq = fs_info->endio_repair_workers; 8068b110e39SMiao Xie func = btrfs_endio_repair_helper; 8078b110e39SMiao Xie } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { 8089e0af237SLiu Bo wq = fs_info->endio_raid56_workers; 8099e0af237SLiu Bo func = btrfs_endio_raid56_helper; 8109e0af237SLiu Bo } else if (end_io_wq->metadata) { 8119e0af237SLiu Bo wq = fs_info->endio_meta_workers; 8129e0af237SLiu Bo func = btrfs_endio_meta_helper; 8139e0af237SLiu Bo } else { 8149e0af237SLiu Bo wq = fs_info->endio_workers; 8159e0af237SLiu Bo func = btrfs_endio_helper; 8169e0af237SLiu Bo } 8179e0af237SLiu Bo } 8189e0af237SLiu Bo 8199e0af237SLiu Bo btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); 8209e0af237SLiu Bo btrfs_queue_work(wq, &end_io_wq->work); 821ce9adaa5SChris Mason } 822ce9adaa5SChris Mason 82322c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 824bfebd8b5SDavid Sterba enum btrfs_wq_endio_type metadata) 8250b86a832SChris Mason { 82697eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 8278b110e39SMiao Xie 82897eb6b69SDavid Sterba end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); 829ce9adaa5SChris Mason if (!end_io_wq) 830ce9adaa5SChris Mason return -ENOMEM; 831ce9adaa5SChris Mason 832ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 833ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 83422c59948SChris Mason end_io_wq->info = info; 835ce9adaa5SChris Mason end_io_wq->error = 0; 836ce9adaa5SChris Mason end_io_wq->bio = bio; 83722c59948SChris Mason end_io_wq->metadata = metadata; 838ce9adaa5SChris Mason 839ce9adaa5SChris Mason bio->bi_private = end_io_wq; 840ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 84122c59948SChris Mason return 0; 84222c59948SChris Mason } 84322c59948SChris Mason 844b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 8454854ddd0SChris Mason { 8464854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 8475cdc7ad3SQu Wenruo info->thread_pool_size, 8484854ddd0SChris Mason info->fs_devices->open_devices); 8494854ddd0SChris Mason return 256 * limit; 8504854ddd0SChris Mason } 8514854ddd0SChris Mason 8524a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 8534a69a410SChris Mason { 8544a69a410SChris Mason struct async_submit_bio *async; 85579787eaaSJeff Mahoney int ret; 8564a69a410SChris Mason 8574a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 85881a75f67SMike Christie ret = async->submit_bio_start(async->inode, async->bio, 859eaf25d93SChris Mason async->mirror_num, async->bio_flags, 860eaf25d93SChris Mason async->bio_offset); 86179787eaaSJeff Mahoney if (ret) 86279787eaaSJeff Mahoney async->error = ret; 8634a69a410SChris Mason } 8644a69a410SChris Mason 8654a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 8668b712842SChris Mason { 8678b712842SChris Mason struct btrfs_fs_info *fs_info; 8688b712842SChris Mason struct async_submit_bio *async; 8694854ddd0SChris Mason int limit; 8708b712842SChris Mason 8718b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 8728b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 8734854ddd0SChris Mason 874b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 8754854ddd0SChris Mason limit = limit * 2 / 3; 8764854ddd0SChris Mason 877ee863954SDavid Sterba /* 878ee863954SDavid Sterba * atomic_dec_return implies a barrier for waitqueue_active 879ee863954SDavid Sterba */ 88066657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 881b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 8824854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 8834854ddd0SChris Mason 884bb7ab3b9SAdam Buchbinder /* If an error occurred we just want to clean up the bio and move on */ 88579787eaaSJeff Mahoney if (async->error) { 8864246a0b6SChristoph Hellwig async->bio->bi_error = async->error; 8874246a0b6SChristoph Hellwig bio_endio(async->bio); 88879787eaaSJeff Mahoney return; 88979787eaaSJeff Mahoney } 89079787eaaSJeff Mahoney 89181a75f67SMike Christie async->submit_bio_done(async->inode, async->bio, async->mirror_num, 89281a75f67SMike Christie async->bio_flags, async->bio_offset); 8934a69a410SChris Mason } 8944a69a410SChris Mason 8954a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 8964a69a410SChris Mason { 8974a69a410SChris Mason struct async_submit_bio *async; 8984a69a410SChris Mason 8994a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 9008b712842SChris Mason kfree(async); 9018b712842SChris Mason } 9028b712842SChris Mason 90344b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 90481a75f67SMike Christie struct bio *bio, int mirror_num, 905c8b97818SChris Mason unsigned long bio_flags, 906eaf25d93SChris Mason u64 bio_offset, 9074a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 9084a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 90944b8bd7eSChris Mason { 91044b8bd7eSChris Mason struct async_submit_bio *async; 91144b8bd7eSChris Mason 91244b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 91344b8bd7eSChris Mason if (!async) 91444b8bd7eSChris Mason return -ENOMEM; 91544b8bd7eSChris Mason 91644b8bd7eSChris Mason async->inode = inode; 91744b8bd7eSChris Mason async->bio = bio; 91844b8bd7eSChris Mason async->mirror_num = mirror_num; 9194a69a410SChris Mason async->submit_bio_start = submit_bio_start; 9204a69a410SChris Mason async->submit_bio_done = submit_bio_done; 9214a69a410SChris Mason 9229e0af237SLiu Bo btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, 9235cdc7ad3SQu Wenruo run_one_async_done, run_one_async_free); 9244a69a410SChris Mason 925c8b97818SChris Mason async->bio_flags = bio_flags; 926eaf25d93SChris Mason async->bio_offset = bio_offset; 9278c8bee1dSChris Mason 92879787eaaSJeff Mahoney async->error = 0; 92979787eaaSJeff Mahoney 930cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 931d313d7a3SChris Mason 9321eff9d32SJens Axboe if (bio->bi_opf & REQ_SYNC) 9335cdc7ad3SQu Wenruo btrfs_set_work_high_priority(&async->work); 934d313d7a3SChris Mason 9355cdc7ad3SQu Wenruo btrfs_queue_work(fs_info->workers, &async->work); 9369473f16cSChris Mason 937771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 938771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 939771ed689SChris Mason wait_event(fs_info->async_submit_wait, 940771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 941771ed689SChris Mason } 942771ed689SChris Mason 94344b8bd7eSChris Mason return 0; 94444b8bd7eSChris Mason } 94544b8bd7eSChris Mason 946ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 947ce3ed71aSChris Mason { 9482c30c71bSKent Overstreet struct bio_vec *bvec; 949ce3ed71aSChris Mason struct btrfs_root *root; 9502c30c71bSKent Overstreet int i, ret = 0; 951ce3ed71aSChris Mason 9522c30c71bSKent Overstreet bio_for_each_segment_all(bvec, bio, i) { 953ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 95401d58472SDaniel Dressler ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); 95579787eaaSJeff Mahoney if (ret) 95679787eaaSJeff Mahoney break; 957ce3ed71aSChris Mason } 9582c30c71bSKent Overstreet 95979787eaaSJeff Mahoney return ret; 960ce3ed71aSChris Mason } 961ce3ed71aSChris Mason 96281a75f67SMike Christie static int __btree_submit_bio_start(struct inode *inode, struct bio *bio, 96381a75f67SMike Christie int mirror_num, unsigned long bio_flags, 964eaf25d93SChris Mason u64 bio_offset) 96522c59948SChris Mason { 9668b712842SChris Mason /* 9678b712842SChris Mason * when we're called for a write, we're already in the async 9685443be45SChris Mason * submission context. Just jump into btrfs_map_bio 9698b712842SChris Mason */ 97079787eaaSJeff Mahoney return btree_csum_one_bio(bio); 97122c59948SChris Mason } 97222c59948SChris Mason 97381a75f67SMike Christie static int __btree_submit_bio_done(struct inode *inode, struct bio *bio, 974eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 975eaf25d93SChris Mason u64 bio_offset) 9764a69a410SChris Mason { 97761891923SStefan Behrens int ret; 97861891923SStefan Behrens 9798b712842SChris Mason /* 9804a69a410SChris Mason * when we're called for a write, we're already in the async 9814a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 9828b712842SChris Mason */ 98381a75f67SMike Christie ret = btrfs_map_bio(BTRFS_I(inode)->root, bio, mirror_num, 1); 9844246a0b6SChristoph Hellwig if (ret) { 9854246a0b6SChristoph Hellwig bio->bi_error = ret; 9864246a0b6SChristoph Hellwig bio_endio(bio); 9874246a0b6SChristoph Hellwig } 98861891923SStefan Behrens return ret; 9890b86a832SChris Mason } 9900b86a832SChris Mason 991de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 992de0022b9SJosef Bacik { 993de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 994de0022b9SJosef Bacik return 0; 995de0022b9SJosef Bacik #ifdef CONFIG_X86 996bc696ca0SBorislav Petkov if (static_cpu_has(X86_FEATURE_XMM4_2)) 997de0022b9SJosef Bacik return 0; 998de0022b9SJosef Bacik #endif 999de0022b9SJosef Bacik return 1; 1000de0022b9SJosef Bacik } 1001de0022b9SJosef Bacik 100281a75f67SMike Christie static int btree_submit_bio_hook(struct inode *inode, struct bio *bio, 1003eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 1004eaf25d93SChris Mason u64 bio_offset) 100544b8bd7eSChris Mason { 1006de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 10074a69a410SChris Mason int ret; 1008cad321adSChris Mason 100937226b21SMike Christie if (bio_op(bio) != REQ_OP_WRITE) { 1010cad321adSChris Mason /* 1011cad321adSChris Mason * called for a read, do the setup so that checksum validation 1012cad321adSChris Mason * can happen in the async kernel threads 1013cad321adSChris Mason */ 1014f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 1015bfebd8b5SDavid Sterba bio, BTRFS_WQ_ENDIO_METADATA); 10161d4284bdSChris Mason if (ret) 101761891923SStefan Behrens goto out_w_error; 101881a75f67SMike Christie ret = btrfs_map_bio(BTRFS_I(inode)->root, bio, mirror_num, 0); 1019de0022b9SJosef Bacik } else if (!async) { 1020de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 1021de0022b9SJosef Bacik if (ret) 102261891923SStefan Behrens goto out_w_error; 102381a75f67SMike Christie ret = btrfs_map_bio(BTRFS_I(inode)->root, bio, mirror_num, 0); 102461891923SStefan Behrens } else { 1025cad321adSChris Mason /* 102661891923SStefan Behrens * kthread helpers are used to submit writes so that 102761891923SStefan Behrens * checksumming can happen in parallel across all CPUs 1028cad321adSChris Mason */ 102961891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 103081a75f67SMike Christie inode, bio, mirror_num, 0, 1031eaf25d93SChris Mason bio_offset, 10324a69a410SChris Mason __btree_submit_bio_start, 10334a69a410SChris Mason __btree_submit_bio_done); 103444b8bd7eSChris Mason } 103544b8bd7eSChris Mason 10364246a0b6SChristoph Hellwig if (ret) 10374246a0b6SChristoph Hellwig goto out_w_error; 10384246a0b6SChristoph Hellwig return 0; 10394246a0b6SChristoph Hellwig 104061891923SStefan Behrens out_w_error: 10414246a0b6SChristoph Hellwig bio->bi_error = ret; 10424246a0b6SChristoph Hellwig bio_endio(bio); 104361891923SStefan Behrens return ret; 104461891923SStefan Behrens } 104561891923SStefan Behrens 10463dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 1047784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 1048a6bc32b8SMel Gorman struct page *newpage, struct page *page, 1049a6bc32b8SMel Gorman enum migrate_mode mode) 1050784b4e29SChris Mason { 1051784b4e29SChris Mason /* 1052784b4e29SChris Mason * we can't safely write a btree page from here, 1053784b4e29SChris Mason * we haven't done the locking hook 1054784b4e29SChris Mason */ 1055784b4e29SChris Mason if (PageDirty(page)) 1056784b4e29SChris Mason return -EAGAIN; 1057784b4e29SChris Mason /* 1058784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 1059784b4e29SChris Mason * We must have no buffers or drop them. 1060784b4e29SChris Mason */ 1061784b4e29SChris Mason if (page_has_private(page) && 1062784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 1063784b4e29SChris Mason return -EAGAIN; 1064a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 1065784b4e29SChris Mason } 10663dd1462eSJan Beulich #endif 1067784b4e29SChris Mason 10680da5468fSChris Mason 10690da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 10700da5468fSChris Mason struct writeback_control *wbc) 10710da5468fSChris Mason { 1072e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 1073e2d84521SMiao Xie int ret; 1074e2d84521SMiao Xie 1075d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 1076448d640bSChris Mason 1077448d640bSChris Mason if (wbc->for_kupdate) 1078448d640bSChris Mason return 0; 1079448d640bSChris Mason 1080e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 1081b9473439SChris Mason /* this is a bit racy, but that's ok */ 1082e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 1083e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 1084e2d84521SMiao Xie if (ret < 0) 1085793955bcSChris Mason return 0; 1086793955bcSChris Mason } 10870b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 10880da5468fSChris Mason } 10890da5468fSChris Mason 1090b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 10915f39d397SChris Mason { 1092d1310b2eSChris Mason struct extent_io_tree *tree; 1093d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10948ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 10955f39d397SChris Mason } 10965f39d397SChris Mason 109770dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 10985f39d397SChris Mason { 109998509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 110098509cfcSChris Mason return 0; 11010c4e538bSDavid Sterba 1102f7a52a40SDavid Sterba return try_release_extent_buffer(page); 1103d98237b3SChris Mason } 1104d98237b3SChris Mason 1105d47992f8SLukas Czerner static void btree_invalidatepage(struct page *page, unsigned int offset, 1106d47992f8SLukas Czerner unsigned int length) 1107d98237b3SChris Mason { 1108d1310b2eSChris Mason struct extent_io_tree *tree; 1109d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 11105f39d397SChris Mason extent_invalidatepage(tree, page, offset); 11115f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 11129ad6b7bcSChris Mason if (PagePrivate(page)) { 1113efe120a0SFrank Holton btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, 1114efe120a0SFrank Holton "page private not zero on page %llu", 1115efe120a0SFrank Holton (unsigned long long)page_offset(page)); 11169ad6b7bcSChris Mason ClearPagePrivate(page); 11179ad6b7bcSChris Mason set_page_private(page, 0); 111809cbfeafSKirill A. Shutemov put_page(page); 11199ad6b7bcSChris Mason } 1120d98237b3SChris Mason } 1121d98237b3SChris Mason 11220b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 11230b32f4bbSJosef Bacik { 1124bb146eb2SJosef Bacik #ifdef DEBUG 11250b32f4bbSJosef Bacik struct extent_buffer *eb; 11260b32f4bbSJosef Bacik 11270b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 11280b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 11290b32f4bbSJosef Bacik BUG_ON(!eb); 11300b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 11310b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 11320b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1133bb146eb2SJosef Bacik #endif 11340b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 11350b32f4bbSJosef Bacik } 11360b32f4bbSJosef Bacik 11377f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1138d98237b3SChris Mason .readpage = btree_readpage, 11390da5468fSChris Mason .writepages = btree_writepages, 11405f39d397SChris Mason .releasepage = btree_releasepage, 11415f39d397SChris Mason .invalidatepage = btree_invalidatepage, 11425a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1143784b4e29SChris Mason .migratepage = btree_migratepage, 11445a92bc88SChris Mason #endif 11450b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1146d98237b3SChris Mason }; 1147123abc88SChris Mason 1148d3e46feaSDavid Sterba void readahead_tree_block(struct btrfs_root *root, u64 bytenr) 1149090d1875SChris Mason { 11505f39d397SChris Mason struct extent_buffer *buf = NULL; 11515f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1152090d1875SChris Mason 1153a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1154c871b0f2SLiu Bo if (IS_ERR(buf)) 11556197d86eSDavid Sterba return; 1156d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 11578436ea91SJosef Bacik buf, WAIT_NONE, btree_get_extent, 0); 11585f39d397SChris Mason free_extent_buffer(buf); 1159090d1875SChris Mason } 1160090d1875SChris Mason 1161c0dcaa4dSDavid Sterba int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, 1162ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1163ab0fff03SArne Jansen { 1164ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1165ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1166ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1167ab0fff03SArne Jansen int ret; 1168ab0fff03SArne Jansen 1169a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1170c871b0f2SLiu Bo if (IS_ERR(buf)) 1171ab0fff03SArne Jansen return 0; 1172ab0fff03SArne Jansen 1173ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1174ab0fff03SArne Jansen 11758436ea91SJosef Bacik ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK, 1176ab0fff03SArne Jansen btree_get_extent, mirror_num); 1177ab0fff03SArne Jansen if (ret) { 1178ab0fff03SArne Jansen free_extent_buffer(buf); 1179ab0fff03SArne Jansen return ret; 1180ab0fff03SArne Jansen } 1181ab0fff03SArne Jansen 1182ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1183ab0fff03SArne Jansen free_extent_buffer(buf); 1184ab0fff03SArne Jansen return -EIO; 11850b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1186ab0fff03SArne Jansen *eb = buf; 1187ab0fff03SArne Jansen } else { 1188ab0fff03SArne Jansen free_extent_buffer(buf); 1189ab0fff03SArne Jansen } 1190ab0fff03SArne Jansen return 0; 1191ab0fff03SArne Jansen } 1192ab0fff03SArne Jansen 119301d58472SDaniel Dressler struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, 11940308af44SDavid Sterba u64 bytenr) 11950999df54SChris Mason { 119601d58472SDaniel Dressler return find_extent_buffer(fs_info, bytenr); 11970999df54SChris Mason } 11980999df54SChris Mason 11990999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 1200a83fffb7SDavid Sterba u64 bytenr) 12010999df54SChris Mason { 1202f5ee5c9aSJeff Mahoney if (btrfs_is_testing(root->fs_info)) 1203b9ef22deSFeifei Xu return alloc_test_extent_buffer(root->fs_info, bytenr, 1204b9ef22deSFeifei Xu root->nodesize); 1205ce3e6984SDavid Sterba return alloc_extent_buffer(root->fs_info, bytenr); 12060999df54SChris Mason } 12070999df54SChris Mason 12080999df54SChris Mason 1209e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1210e02119d5SChris Mason { 1211727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 12128aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1213e02119d5SChris Mason } 1214e02119d5SChris Mason 1215e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1216e02119d5SChris Mason { 1217727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 12188aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1219e02119d5SChris Mason } 1220e02119d5SChris Mason 1221db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1222ce86cd59SDavid Sterba u64 parent_transid) 1223e20d96d6SChris Mason { 12245f39d397SChris Mason struct extent_buffer *buf = NULL; 122519c00ddcSChris Mason int ret; 122619c00ddcSChris Mason 1227a83fffb7SDavid Sterba buf = btrfs_find_create_tree_block(root, bytenr); 1228c871b0f2SLiu Bo if (IS_ERR(buf)) 1229c871b0f2SLiu Bo return buf; 1230e4204dedSChris Mason 12318436ea91SJosef Bacik ret = btree_read_extent_buffer_pages(root, buf, parent_transid); 12320f0fe8f7SFilipe David Borba Manana if (ret) { 12330f0fe8f7SFilipe David Borba Manana free_extent_buffer(buf); 123464c043deSLiu Bo return ERR_PTR(ret); 12350f0fe8f7SFilipe David Borba Manana } 12365f39d397SChris Mason return buf; 1237ce9adaa5SChris Mason 1238eb60ceacSChris Mason } 1239eb60ceacSChris Mason 124001d58472SDaniel Dressler void clean_tree_block(struct btrfs_trans_handle *trans, 124101d58472SDaniel Dressler struct btrfs_fs_info *fs_info, 12425f39d397SChris Mason struct extent_buffer *buf) 1243ed2ff2cbSChris Mason { 124455c69072SChris Mason if (btrfs_header_generation(buf) == 1245e2d84521SMiao Xie fs_info->running_transaction->transid) { 1246b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1247b4ce94deSChris Mason 1248b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1249e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1250e2d84521SMiao Xie -buf->len, 1251e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1252b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1253b9473439SChris Mason btrfs_set_lock_blocking(buf); 12540b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1255925baeddSChris Mason } 12565f39d397SChris Mason } 1257ed7b63ebSJosef Bacik } 12585f39d397SChris Mason 12598257b2dcSMiao Xie static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) 12608257b2dcSMiao Xie { 12618257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 12628257b2dcSMiao Xie int ret; 12638257b2dcSMiao Xie 12648257b2dcSMiao Xie writers = kmalloc(sizeof(*writers), GFP_NOFS); 12658257b2dcSMiao Xie if (!writers) 12668257b2dcSMiao Xie return ERR_PTR(-ENOMEM); 12678257b2dcSMiao Xie 1268908c7f19STejun Heo ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); 12698257b2dcSMiao Xie if (ret < 0) { 12708257b2dcSMiao Xie kfree(writers); 12718257b2dcSMiao Xie return ERR_PTR(ret); 12728257b2dcSMiao Xie } 12738257b2dcSMiao Xie 12748257b2dcSMiao Xie init_waitqueue_head(&writers->wait); 12758257b2dcSMiao Xie return writers; 12768257b2dcSMiao Xie } 12778257b2dcSMiao Xie 12788257b2dcSMiao Xie static void 12798257b2dcSMiao Xie btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) 12808257b2dcSMiao Xie { 12818257b2dcSMiao Xie percpu_counter_destroy(&writers->counter); 12828257b2dcSMiao Xie kfree(writers); 12838257b2dcSMiao Xie } 12848257b2dcSMiao Xie 1285707e8a07SDavid Sterba static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize, 1286707e8a07SDavid Sterba struct btrfs_root *root, struct btrfs_fs_info *fs_info, 1287e20d96d6SChris Mason u64 objectid) 1288d97e63b6SChris Mason { 12897c0260eeSJeff Mahoney bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 1290cfaa7295SChris Mason root->node = NULL; 1291a28ec197SChris Mason root->commit_root = NULL; 1292db94535dSChris Mason root->sectorsize = sectorsize; 1293db94535dSChris Mason root->nodesize = nodesize; 129487ee04ebSChris Mason root->stripesize = stripesize; 129527cdeb70SMiao Xie root->state = 0; 1296d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 12970b86a832SChris Mason 12980f7d52f4SChris Mason root->objectid = objectid; 12990f7d52f4SChris Mason root->last_trans = 0; 130013a8a7c8SYan, Zheng root->highest_objectid = 0; 1301eb73c1b7SMiao Xie root->nr_delalloc_inodes = 0; 1302199c2a9cSMiao Xie root->nr_ordered_extents = 0; 130358176a96SJosef Bacik root->name = NULL; 13046bef4d31SEric Paris root->inode_tree = RB_ROOT; 130516cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1306f0486c68SYan, Zheng root->block_rsv = NULL; 1307d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 13080b86a832SChris Mason 13090b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 13105d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 1311eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_inodes); 1312eb73c1b7SMiao Xie INIT_LIST_HEAD(&root->delalloc_root); 1313199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_extents); 1314199c2a9cSMiao Xie INIT_LIST_HEAD(&root->ordered_root); 13152ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 13162ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1317d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 13185d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1319eb73c1b7SMiao Xie spin_lock_init(&root->delalloc_lock); 1320199c2a9cSMiao Xie spin_lock_init(&root->ordered_extent_lock); 1321f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 13222ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 13232ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1324a2135011SChris Mason mutex_init(&root->objectid_mutex); 1325e02119d5SChris Mason mutex_init(&root->log_mutex); 132631f3d255SMiao Xie mutex_init(&root->ordered_extent_mutex); 1327573bfb72SMiao Xie mutex_init(&root->delalloc_mutex); 13287237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 13297237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 13307237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 13318b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[0]); 13328b050d35SMiao Xie INIT_LIST_HEAD(&root->log_ctxs[1]); 13337237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 13347237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 13357237f183SYan Zheng atomic_set(&root->log_writers, 0); 13362ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 13378a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 1338b0feb9d9SMiao Xie atomic_set(&root->refs, 1); 13398257b2dcSMiao Xie atomic_set(&root->will_be_snapshoted, 0); 134055eeaf05SQu Wenruo atomic_set(&root->qgroup_meta_rsv, 0); 13417237f183SYan Zheng root->log_transid = 0; 1342d1433debSMiao Xie root->log_transid_committed = -1; 1343257c62e1SChris Mason root->last_log_commit = 0; 13447c0260eeSJeff Mahoney if (!dummy) 1345d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1346f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1347017e5369SChris Mason 13483768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 13493768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 13506702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 13517c0260eeSJeff Mahoney if (!dummy) 13523f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 135306ea65a3SJosef Bacik else 135406ea65a3SJosef Bacik root->defrag_trans_start = 0; 13554d775673SChris Mason root->root_key.objectid = objectid; 13560ee5dc67SAl Viro root->anon_dev = 0; 13578ea05e3aSAlexander Block 13585f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 13593768f368SChris Mason } 13603768f368SChris Mason 136174e4d827SDavid Sterba static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, 136274e4d827SDavid Sterba gfp_t flags) 13636f07e42eSAl Viro { 136474e4d827SDavid Sterba struct btrfs_root *root = kzalloc(sizeof(*root), flags); 13656f07e42eSAl Viro if (root) 13666f07e42eSAl Viro root->fs_info = fs_info; 13676f07e42eSAl Viro return root; 13686f07e42eSAl Viro } 13696f07e42eSAl Viro 137006ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 137106ea65a3SJosef Bacik /* Should only be used by the testing infrastructure */ 13727c0260eeSJeff Mahoney struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info, 13737c0260eeSJeff Mahoney u32 sectorsize, u32 nodesize) 137406ea65a3SJosef Bacik { 137506ea65a3SJosef Bacik struct btrfs_root *root; 137606ea65a3SJosef Bacik 13777c0260eeSJeff Mahoney if (!fs_info) 13787c0260eeSJeff Mahoney return ERR_PTR(-EINVAL); 13797c0260eeSJeff Mahoney 13807c0260eeSJeff Mahoney root = btrfs_alloc_root(fs_info, GFP_KERNEL); 138106ea65a3SJosef Bacik if (!root) 138206ea65a3SJosef Bacik return ERR_PTR(-ENOMEM); 1383b9ef22deSFeifei Xu /* We don't use the stripesize in selftest, set it as sectorsize */ 13847c0260eeSJeff Mahoney __setup_root(nodesize, sectorsize, sectorsize, root, fs_info, 1385ef9f2db3SFeifei Xu BTRFS_ROOT_TREE_OBJECTID); 1386faa2dbf0SJosef Bacik root->alloc_bytenr = 0; 138706ea65a3SJosef Bacik 138806ea65a3SJosef Bacik return root; 138906ea65a3SJosef Bacik } 139006ea65a3SJosef Bacik #endif 139106ea65a3SJosef Bacik 139220897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 139320897f5cSArne Jansen struct btrfs_fs_info *fs_info, 139420897f5cSArne Jansen u64 objectid) 139520897f5cSArne Jansen { 139620897f5cSArne Jansen struct extent_buffer *leaf; 139720897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 139820897f5cSArne Jansen struct btrfs_root *root; 139920897f5cSArne Jansen struct btrfs_key key; 140020897f5cSArne Jansen int ret = 0; 14016463fe58SStefan Behrens uuid_le uuid; 140220897f5cSArne Jansen 140374e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_KERNEL); 140420897f5cSArne Jansen if (!root) 140520897f5cSArne Jansen return ERR_PTR(-ENOMEM); 140620897f5cSArne Jansen 1407707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1408707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, objectid); 140920897f5cSArne Jansen root->root_key.objectid = objectid; 141020897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 141120897f5cSArne Jansen root->root_key.offset = 0; 141220897f5cSArne Jansen 14134d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); 141420897f5cSArne Jansen if (IS_ERR(leaf)) { 141520897f5cSArne Jansen ret = PTR_ERR(leaf); 14161dd05682STsutomu Itoh leaf = NULL; 141720897f5cSArne Jansen goto fail; 141820897f5cSArne Jansen } 141920897f5cSArne Jansen 142020897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 142120897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 142220897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 142320897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 142420897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 142520897f5cSArne Jansen root->node = leaf; 142620897f5cSArne Jansen 14270a4e5586SRoss Kirk write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), 142820897f5cSArne Jansen BTRFS_FSID_SIZE); 142920897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 1430b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(leaf), 143120897f5cSArne Jansen BTRFS_UUID_SIZE); 143220897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 143320897f5cSArne Jansen 143420897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 143527cdeb70SMiao Xie set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 143620897f5cSArne Jansen 143720897f5cSArne Jansen root->root_item.flags = 0; 143820897f5cSArne Jansen root->root_item.byte_limit = 0; 143920897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 144020897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 144120897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 144220897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 144320897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 144420897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 144520897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 14466463fe58SStefan Behrens uuid_le_gen(&uuid); 14476463fe58SStefan Behrens memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); 144820897f5cSArne Jansen root->root_item.drop_level = 0; 144920897f5cSArne Jansen 145020897f5cSArne Jansen key.objectid = objectid; 145120897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 145220897f5cSArne Jansen key.offset = 0; 145320897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 145420897f5cSArne Jansen if (ret) 145520897f5cSArne Jansen goto fail; 145620897f5cSArne Jansen 145720897f5cSArne Jansen btrfs_tree_unlock(leaf); 145820897f5cSArne Jansen 145920897f5cSArne Jansen return root; 14601dd05682STsutomu Itoh 14611dd05682STsutomu Itoh fail: 14621dd05682STsutomu Itoh if (leaf) { 14631dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 146459885b39STsutomu Itoh free_extent_buffer(root->commit_root); 14651dd05682STsutomu Itoh free_extent_buffer(leaf); 14661dd05682STsutomu Itoh } 14671dd05682STsutomu Itoh kfree(root); 14681dd05682STsutomu Itoh 14691dd05682STsutomu Itoh return ERR_PTR(ret); 147020897f5cSArne Jansen } 147120897f5cSArne Jansen 14727237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1473e02119d5SChris Mason struct btrfs_fs_info *fs_info) 14740f7d52f4SChris Mason { 14750f7d52f4SChris Mason struct btrfs_root *root; 14760f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 14777237f183SYan Zheng struct extent_buffer *leaf; 1478e02119d5SChris Mason 147974e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1480e02119d5SChris Mason if (!root) 14817237f183SYan Zheng return ERR_PTR(-ENOMEM); 1482e02119d5SChris Mason 1483707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1484707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, 1485707e8a07SDavid Sterba BTRFS_TREE_LOG_OBJECTID); 1486e02119d5SChris Mason 1487e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1488e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1489e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 149027cdeb70SMiao Xie 14917237f183SYan Zheng /* 149227cdeb70SMiao Xie * DON'T set REF_COWS for log trees 149327cdeb70SMiao Xie * 14947237f183SYan Zheng * log trees do not get reference counted because they go away 14957237f183SYan Zheng * before a real commit is actually done. They do store pointers 14967237f183SYan Zheng * to file data extents, and those reference counts still get 14977237f183SYan Zheng * updated (along with back refs to the log tree). 14987237f183SYan Zheng */ 1499e02119d5SChris Mason 15004d75f8a9SDavid Sterba leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, 15014d75f8a9SDavid Sterba NULL, 0, 0, 0); 15027237f183SYan Zheng if (IS_ERR(leaf)) { 15037237f183SYan Zheng kfree(root); 15047237f183SYan Zheng return ERR_CAST(leaf); 15057237f183SYan Zheng } 1506e02119d5SChris Mason 15075d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 15085d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 15095d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 15105d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 15115d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 15127237f183SYan Zheng root->node = leaf; 1513e02119d5SChris Mason 1514e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 15150a4e5586SRoss Kirk btrfs_header_fsid(), BTRFS_FSID_SIZE); 1516e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1517e02119d5SChris Mason btrfs_tree_unlock(root->node); 15187237f183SYan Zheng return root; 15197237f183SYan Zheng } 15207237f183SYan Zheng 15217237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 15227237f183SYan Zheng struct btrfs_fs_info *fs_info) 15237237f183SYan Zheng { 15247237f183SYan Zheng struct btrfs_root *log_root; 15257237f183SYan Zheng 15267237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 15277237f183SYan Zheng if (IS_ERR(log_root)) 15287237f183SYan Zheng return PTR_ERR(log_root); 15297237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 15307237f183SYan Zheng fs_info->log_root_tree = log_root; 15317237f183SYan Zheng return 0; 15327237f183SYan Zheng } 15337237f183SYan Zheng 15347237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 15357237f183SYan Zheng struct btrfs_root *root) 15367237f183SYan Zheng { 15377237f183SYan Zheng struct btrfs_root *log_root; 15387237f183SYan Zheng struct btrfs_inode_item *inode_item; 15397237f183SYan Zheng 15407237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 15417237f183SYan Zheng if (IS_ERR(log_root)) 15427237f183SYan Zheng return PTR_ERR(log_root); 15437237f183SYan Zheng 15447237f183SYan Zheng log_root->last_trans = trans->transid; 15457237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 15467237f183SYan Zheng 15477237f183SYan Zheng inode_item = &log_root->root_item.inode; 15483cae210fSQu Wenruo btrfs_set_stack_inode_generation(inode_item, 1); 15493cae210fSQu Wenruo btrfs_set_stack_inode_size(inode_item, 3); 15503cae210fSQu Wenruo btrfs_set_stack_inode_nlink(inode_item, 1); 1551707e8a07SDavid Sterba btrfs_set_stack_inode_nbytes(inode_item, root->nodesize); 15523cae210fSQu Wenruo btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); 15537237f183SYan Zheng 15545d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 15557237f183SYan Zheng 15567237f183SYan Zheng WARN_ON(root->log_root); 15577237f183SYan Zheng root->log_root = log_root; 15587237f183SYan Zheng root->log_transid = 0; 1559d1433debSMiao Xie root->log_transid_committed = -1; 1560257c62e1SChris Mason root->last_log_commit = 0; 1561e02119d5SChris Mason return 0; 1562e02119d5SChris Mason } 1563e02119d5SChris Mason 156435a3621bSStefan Behrens static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, 1565cb517eabSMiao Xie struct btrfs_key *key) 1566e02119d5SChris Mason { 1567e02119d5SChris Mason struct btrfs_root *root; 1568e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 15690f7d52f4SChris Mason struct btrfs_path *path; 157084234f3aSYan Zheng u64 generation; 1571cb517eabSMiao Xie int ret; 1572cb517eabSMiao Xie 1573cb517eabSMiao Xie path = btrfs_alloc_path(); 1574cb517eabSMiao Xie if (!path) 1575cb517eabSMiao Xie return ERR_PTR(-ENOMEM); 15760f7d52f4SChris Mason 157774e4d827SDavid Sterba root = btrfs_alloc_root(fs_info, GFP_NOFS); 1578cb517eabSMiao Xie if (!root) { 1579cb517eabSMiao Xie ret = -ENOMEM; 1580cb517eabSMiao Xie goto alloc_fail; 15810f7d52f4SChris Mason } 15820f7d52f4SChris Mason 1583707e8a07SDavid Sterba __setup_root(tree_root->nodesize, tree_root->sectorsize, 1584707e8a07SDavid Sterba tree_root->stripesize, root, fs_info, key->objectid); 15850f7d52f4SChris Mason 1586cb517eabSMiao Xie ret = btrfs_find_root(tree_root, key, path, 1587cb517eabSMiao Xie &root->root_item, &root->root_key); 15880f7d52f4SChris Mason if (ret) { 158913a8a7c8SYan, Zheng if (ret > 0) 159013a8a7c8SYan, Zheng ret = -ENOENT; 1591cb517eabSMiao Xie goto find_fail; 15920f7d52f4SChris Mason } 159313a8a7c8SYan, Zheng 159484234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1595db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 1596ce86cd59SDavid Sterba generation); 159764c043deSLiu Bo if (IS_ERR(root->node)) { 159864c043deSLiu Bo ret = PTR_ERR(root->node); 1599cb517eabSMiao Xie goto find_fail; 1600cb517eabSMiao Xie } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { 1601cb517eabSMiao Xie ret = -EIO; 160264c043deSLiu Bo free_extent_buffer(root->node); 160364c043deSLiu Bo goto find_fail; 1604416bc658SJosef Bacik } 16055d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 160613a8a7c8SYan, Zheng out: 1607cb517eabSMiao Xie btrfs_free_path(path); 1608cb517eabSMiao Xie return root; 1609cb517eabSMiao Xie 1610cb517eabSMiao Xie find_fail: 1611cb517eabSMiao Xie kfree(root); 1612cb517eabSMiao Xie alloc_fail: 1613cb517eabSMiao Xie root = ERR_PTR(ret); 1614cb517eabSMiao Xie goto out; 1615cb517eabSMiao Xie } 1616cb517eabSMiao Xie 1617cb517eabSMiao Xie struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, 1618cb517eabSMiao Xie struct btrfs_key *location) 1619cb517eabSMiao Xie { 1620cb517eabSMiao Xie struct btrfs_root *root; 1621cb517eabSMiao Xie 1622cb517eabSMiao Xie root = btrfs_read_tree_root(tree_root, location); 1623cb517eabSMiao Xie if (IS_ERR(root)) 1624cb517eabSMiao Xie return root; 1625cb517eabSMiao Xie 1626cb517eabSMiao Xie if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { 162727cdeb70SMiao Xie set_bit(BTRFS_ROOT_REF_COWS, &root->state); 162808fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 162908fe4db1SLi Zefan } 163013a8a7c8SYan, Zheng 16315eda7b5eSChris Mason return root; 16325eda7b5eSChris Mason } 16335eda7b5eSChris Mason 1634cb517eabSMiao Xie int btrfs_init_fs_root(struct btrfs_root *root) 1635cb517eabSMiao Xie { 1636cb517eabSMiao Xie int ret; 16378257b2dcSMiao Xie struct btrfs_subvolume_writers *writers; 1638cb517eabSMiao Xie 1639cb517eabSMiao Xie root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1640cb517eabSMiao Xie root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1641cb517eabSMiao Xie GFP_NOFS); 1642cb517eabSMiao Xie if (!root->free_ino_pinned || !root->free_ino_ctl) { 1643cb517eabSMiao Xie ret = -ENOMEM; 1644cb517eabSMiao Xie goto fail; 1645cb517eabSMiao Xie } 1646cb517eabSMiao Xie 16478257b2dcSMiao Xie writers = btrfs_alloc_subvolume_writers(); 16488257b2dcSMiao Xie if (IS_ERR(writers)) { 16498257b2dcSMiao Xie ret = PTR_ERR(writers); 16508257b2dcSMiao Xie goto fail; 16518257b2dcSMiao Xie } 16528257b2dcSMiao Xie root->subv_writers = writers; 16538257b2dcSMiao Xie 1654cb517eabSMiao Xie btrfs_init_free_ino_ctl(root); 165557cdc8dbSDavid Sterba spin_lock_init(&root->ino_cache_lock); 165657cdc8dbSDavid Sterba init_waitqueue_head(&root->ino_cache_wait); 1657cb517eabSMiao Xie 1658cb517eabSMiao Xie ret = get_anon_bdev(&root->anon_dev); 1659cb517eabSMiao Xie if (ret) 1660876d2cf1SLiu Bo goto fail; 1661f32e48e9SChandan Rajendra 1662f32e48e9SChandan Rajendra mutex_lock(&root->objectid_mutex); 1663f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(root, 1664f32e48e9SChandan Rajendra &root->highest_objectid); 1665f32e48e9SChandan Rajendra if (ret) { 1666f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1667876d2cf1SLiu Bo goto fail; 1668f32e48e9SChandan Rajendra } 1669f32e48e9SChandan Rajendra 1670f32e48e9SChandan Rajendra ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 1671f32e48e9SChandan Rajendra 1672f32e48e9SChandan Rajendra mutex_unlock(&root->objectid_mutex); 1673f32e48e9SChandan Rajendra 1674cb517eabSMiao Xie return 0; 1675cb517eabSMiao Xie fail: 1676876d2cf1SLiu Bo /* the caller is responsible to call free_fs_root */ 1677cb517eabSMiao Xie return ret; 1678cb517eabSMiao Xie } 1679cb517eabSMiao Xie 168035bbb97fSJeff Mahoney struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, 1681cb517eabSMiao Xie u64 root_id) 1682cb517eabSMiao Xie { 1683cb517eabSMiao Xie struct btrfs_root *root; 1684cb517eabSMiao Xie 1685cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1686cb517eabSMiao Xie root = radix_tree_lookup(&fs_info->fs_roots_radix, 1687cb517eabSMiao Xie (unsigned long)root_id); 1688cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1689cb517eabSMiao Xie return root; 1690cb517eabSMiao Xie } 1691cb517eabSMiao Xie 1692cb517eabSMiao Xie int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, 1693cb517eabSMiao Xie struct btrfs_root *root) 1694cb517eabSMiao Xie { 1695cb517eabSMiao Xie int ret; 1696cb517eabSMiao Xie 1697e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 1698cb517eabSMiao Xie if (ret) 1699cb517eabSMiao Xie return ret; 1700cb517eabSMiao Xie 1701cb517eabSMiao Xie spin_lock(&fs_info->fs_roots_radix_lock); 1702cb517eabSMiao Xie ret = radix_tree_insert(&fs_info->fs_roots_radix, 1703cb517eabSMiao Xie (unsigned long)root->root_key.objectid, 1704cb517eabSMiao Xie root); 1705cb517eabSMiao Xie if (ret == 0) 170627cdeb70SMiao Xie set_bit(BTRFS_ROOT_IN_RADIX, &root->state); 1707cb517eabSMiao Xie spin_unlock(&fs_info->fs_roots_radix_lock); 1708cb517eabSMiao Xie radix_tree_preload_end(); 1709cb517eabSMiao Xie 1710cb517eabSMiao Xie return ret; 1711cb517eabSMiao Xie } 1712cb517eabSMiao Xie 1713c00869f1SMiao Xie struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, 1714c00869f1SMiao Xie struct btrfs_key *location, 1715c00869f1SMiao Xie bool check_ref) 17165eda7b5eSChris Mason { 17175eda7b5eSChris Mason struct btrfs_root *root; 1718381cf658SDavid Sterba struct btrfs_path *path; 17191d4c08e0SDavid Sterba struct btrfs_key key; 17205eda7b5eSChris Mason int ret; 17215eda7b5eSChris Mason 1722edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1723edbd8d4eSChris Mason return fs_info->tree_root; 1724edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1725edbd8d4eSChris Mason return fs_info->extent_root; 17268f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 17278f18cf13SChris Mason return fs_info->chunk_root; 17288f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 17298f18cf13SChris Mason return fs_info->dev_root; 17300403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 17310403e47eSYan Zheng return fs_info->csum_root; 1732bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1733bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1734bcef60f2SArne Jansen ERR_PTR(-ENOENT); 1735f7a81ea4SStefan Behrens if (location->objectid == BTRFS_UUID_TREE_OBJECTID) 1736f7a81ea4SStefan Behrens return fs_info->uuid_root ? fs_info->uuid_root : 1737f7a81ea4SStefan Behrens ERR_PTR(-ENOENT); 173870f6d82eSOmar Sandoval if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) 173970f6d82eSOmar Sandoval return fs_info->free_space_root ? fs_info->free_space_root : 174070f6d82eSOmar Sandoval ERR_PTR(-ENOENT); 17414df27c4dSYan, Zheng again: 1742cb517eabSMiao Xie root = btrfs_lookup_fs_root(fs_info, location->objectid); 174348475471SStefan Behrens if (root) { 1744c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) 174548475471SStefan Behrens return ERR_PTR(-ENOENT); 17465eda7b5eSChris Mason return root; 174748475471SStefan Behrens } 17485eda7b5eSChris Mason 1749cb517eabSMiao Xie root = btrfs_read_fs_root(fs_info->tree_root, location); 17505eda7b5eSChris Mason if (IS_ERR(root)) 17515eda7b5eSChris Mason return root; 17523394e160SChris Mason 1753c00869f1SMiao Xie if (check_ref && btrfs_root_refs(&root->root_item) == 0) { 1754d68fc57bSYan, Zheng ret = -ENOENT; 1755d68fc57bSYan, Zheng goto fail; 1756d68fc57bSYan, Zheng } 1757d68fc57bSYan, Zheng 1758cb517eabSMiao Xie ret = btrfs_init_fs_root(root); 1759cb517eabSMiao Xie if (ret) 1760cb517eabSMiao Xie goto fail; 1761cb517eabSMiao Xie 1762381cf658SDavid Sterba path = btrfs_alloc_path(); 1763381cf658SDavid Sterba if (!path) { 1764381cf658SDavid Sterba ret = -ENOMEM; 1765381cf658SDavid Sterba goto fail; 1766381cf658SDavid Sterba } 17671d4c08e0SDavid Sterba key.objectid = BTRFS_ORPHAN_OBJECTID; 17681d4c08e0SDavid Sterba key.type = BTRFS_ORPHAN_ITEM_KEY; 17691d4c08e0SDavid Sterba key.offset = location->objectid; 17701d4c08e0SDavid Sterba 17711d4c08e0SDavid Sterba ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); 1772381cf658SDavid Sterba btrfs_free_path(path); 1773d68fc57bSYan, Zheng if (ret < 0) 1774d68fc57bSYan, Zheng goto fail; 1775d68fc57bSYan, Zheng if (ret == 0) 177627cdeb70SMiao Xie set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); 1777d68fc57bSYan, Zheng 1778cb517eabSMiao Xie ret = btrfs_insert_fs_root(fs_info, root); 17790f7d52f4SChris Mason if (ret) { 17804df27c4dSYan, Zheng if (ret == -EEXIST) { 17814df27c4dSYan, Zheng free_fs_root(root); 17824df27c4dSYan, Zheng goto again; 17830f7d52f4SChris Mason } 17844df27c4dSYan, Zheng goto fail; 17854df27c4dSYan, Zheng } 1786edbd8d4eSChris Mason return root; 17874df27c4dSYan, Zheng fail: 17884df27c4dSYan, Zheng free_fs_root(root); 17894df27c4dSYan, Zheng return ERR_PTR(ret); 1790edbd8d4eSChris Mason } 1791edbd8d4eSChris Mason 179204160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 179304160088SChris Mason { 179404160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 179504160088SChris Mason int ret = 0; 179604160088SChris Mason struct btrfs_device *device; 179704160088SChris Mason struct backing_dev_info *bdi; 1798b7967db7SChris Mason 17991f78160cSXiao Guangrong rcu_read_lock(); 18001f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1801dfe25020SChris Mason if (!device->bdev) 1802dfe25020SChris Mason continue; 180304160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 1804ff9ea323STejun Heo if (bdi_congested(bdi, bdi_bits)) { 180504160088SChris Mason ret = 1; 180604160088SChris Mason break; 180704160088SChris Mason } 180804160088SChris Mason } 18091f78160cSXiao Guangrong rcu_read_unlock(); 181004160088SChris Mason return ret; 181104160088SChris Mason } 181204160088SChris Mason 181304160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 181404160088SChris Mason { 1815ad081f14SJens Axboe int err; 1816ad081f14SJens Axboe 1817b4caecd4SChristoph Hellwig err = bdi_setup_and_register(bdi, "btrfs"); 1818ad081f14SJens Axboe if (err) 1819ad081f14SJens Axboe return err; 1820ad081f14SJens Axboe 182109cbfeafSKirill A. Shutemov bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; 182204160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 182304160088SChris Mason bdi->congested_data = info; 1824da2f0f74SChris Mason bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; 182504160088SChris Mason return 0; 182604160088SChris Mason } 182704160088SChris Mason 18288b712842SChris Mason /* 18298b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 18308b712842SChris Mason * functions. This is where read checksum verification actually happens 18318b712842SChris Mason */ 18328b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1833ce9adaa5SChris Mason { 1834ce9adaa5SChris Mason struct bio *bio; 183597eb6b69SDavid Sterba struct btrfs_end_io_wq *end_io_wq; 1836ce9adaa5SChris Mason 183797eb6b69SDavid Sterba end_io_wq = container_of(work, struct btrfs_end_io_wq, work); 1838ce9adaa5SChris Mason bio = end_io_wq->bio; 18398b712842SChris Mason 18404246a0b6SChristoph Hellwig bio->bi_error = end_io_wq->error; 1841ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1842ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 184397eb6b69SDavid Sterba kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); 18444246a0b6SChristoph Hellwig bio_endio(bio); 1845ce9adaa5SChris Mason } 184644b8bd7eSChris Mason 1847a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1848a74a4b97SChris Mason { 1849a74a4b97SChris Mason struct btrfs_root *root = arg; 1850d0278245SMiao Xie int again; 1851da288d28SFilipe Manana struct btrfs_trans_handle *trans; 1852a74a4b97SChris Mason 1853a74a4b97SChris Mason do { 1854d0278245SMiao Xie again = 0; 18559d1a2a3aSDavid Sterba 1856d0278245SMiao Xie /* Make the cleaner go to sleep early. */ 1857babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) 1858d0278245SMiao Xie goto sleep; 1859d0278245SMiao Xie 186090c711abSZygo Blaxell /* 186190c711abSZygo Blaxell * Do not do anything if we might cause open_ctree() to block 186290c711abSZygo Blaxell * before we have finished mounting the filesystem. 186390c711abSZygo Blaxell */ 1864afcdd129SJosef Bacik if (!test_bit(BTRFS_FS_OPEN, &root->fs_info->flags)) 186590c711abSZygo Blaxell goto sleep; 186690c711abSZygo Blaxell 1867d0278245SMiao Xie if (!mutex_trylock(&root->fs_info->cleaner_mutex)) 1868d0278245SMiao Xie goto sleep; 1869d0278245SMiao Xie 1870dc7f370cSMiao Xie /* 1871dc7f370cSMiao Xie * Avoid the problem that we change the status of the fs 1872dc7f370cSMiao Xie * during the above check and trylock. 1873dc7f370cSMiao Xie */ 1874babbf170SMiao Xie if (btrfs_need_cleaner_sleep(root)) { 1875dc7f370cSMiao Xie mutex_unlock(&root->fs_info->cleaner_mutex); 1876dc7f370cSMiao Xie goto sleep; 1877dc7f370cSMiao Xie } 1878dc7f370cSMiao Xie 1879c2d6cb16SFilipe Manana mutex_lock(&root->fs_info->cleaner_delayed_iput_mutex); 188024bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 1881c2d6cb16SFilipe Manana mutex_unlock(&root->fs_info->cleaner_delayed_iput_mutex); 1882c2d6cb16SFilipe Manana 18839d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 1884a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 1885a74a4b97SChris Mason 1886d0278245SMiao Xie /* 188705323cd1SMiao Xie * The defragger has dealt with the R/O remount and umount, 188805323cd1SMiao Xie * needn't do anything special here. 1889d0278245SMiao Xie */ 1890d0278245SMiao Xie btrfs_run_defrag_inodes(root->fs_info); 189167c5e7d4SFilipe Manana 189267c5e7d4SFilipe Manana /* 189367c5e7d4SFilipe Manana * Acquires fs_info->delete_unused_bgs_mutex to avoid racing 189467c5e7d4SFilipe Manana * with relocation (btrfs_relocate_chunk) and relocation 189567c5e7d4SFilipe Manana * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) 189667c5e7d4SFilipe Manana * after acquiring fs_info->delete_unused_bgs_mutex. So we 189767c5e7d4SFilipe Manana * can't hold, nor need to, fs_info->cleaner_mutex when deleting 189867c5e7d4SFilipe Manana * unused block groups. 189967c5e7d4SFilipe Manana */ 190067c5e7d4SFilipe Manana btrfs_delete_unused_bgs(root->fs_info); 1901d0278245SMiao Xie sleep: 1902838fe188SJiri Kosina if (!again) { 1903a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 19048929ecfaSYan, Zheng if (!kthread_should_stop()) 1905a74a4b97SChris Mason schedule(); 1906a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1907a74a4b97SChris Mason } 1908a74a4b97SChris Mason } while (!kthread_should_stop()); 1909da288d28SFilipe Manana 1910da288d28SFilipe Manana /* 1911da288d28SFilipe Manana * Transaction kthread is stopped before us and wakes us up. 1912da288d28SFilipe Manana * However we might have started a new transaction and COWed some 1913da288d28SFilipe Manana * tree blocks when deleting unused block groups for example. So 1914da288d28SFilipe Manana * make sure we commit the transaction we started to have a clean 1915da288d28SFilipe Manana * shutdown when evicting the btree inode - if it has dirty pages 1916da288d28SFilipe Manana * when we do the final iput() on it, eviction will trigger a 1917da288d28SFilipe Manana * writeback for it which will fail with null pointer dereferences 1918da288d28SFilipe Manana * since work queues and other resources were already released and 1919da288d28SFilipe Manana * destroyed by the time the iput/eviction/writeback is made. 1920da288d28SFilipe Manana */ 1921da288d28SFilipe Manana trans = btrfs_attach_transaction(root); 1922da288d28SFilipe Manana if (IS_ERR(trans)) { 1923da288d28SFilipe Manana if (PTR_ERR(trans) != -ENOENT) 1924da288d28SFilipe Manana btrfs_err(root->fs_info, 1925da288d28SFilipe Manana "cleaner transaction attach returned %ld", 1926da288d28SFilipe Manana PTR_ERR(trans)); 1927da288d28SFilipe Manana } else { 1928da288d28SFilipe Manana int ret; 1929da288d28SFilipe Manana 1930da288d28SFilipe Manana ret = btrfs_commit_transaction(trans, root); 1931da288d28SFilipe Manana if (ret) 1932da288d28SFilipe Manana btrfs_err(root->fs_info, 1933da288d28SFilipe Manana "cleaner open transaction commit returned %d", 1934da288d28SFilipe Manana ret); 1935da288d28SFilipe Manana } 1936da288d28SFilipe Manana 1937a74a4b97SChris Mason return 0; 1938a74a4b97SChris Mason } 1939a74a4b97SChris Mason 1940a74a4b97SChris Mason static int transaction_kthread(void *arg) 1941a74a4b97SChris Mason { 1942a74a4b97SChris Mason struct btrfs_root *root = arg; 1943a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1944a74a4b97SChris Mason struct btrfs_transaction *cur; 19458929ecfaSYan, Zheng u64 transid; 1946a74a4b97SChris Mason unsigned long now; 1947a74a4b97SChris Mason unsigned long delay; 1948914b2007SJan Kara bool cannot_commit; 1949a74a4b97SChris Mason 1950a74a4b97SChris Mason do { 1951914b2007SJan Kara cannot_commit = false; 19528b87dc17SDavid Sterba delay = HZ * root->fs_info->commit_interval; 1953a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1954a74a4b97SChris Mason 1955a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1956a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1957a74a4b97SChris Mason if (!cur) { 1958a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1959a74a4b97SChris Mason goto sleep; 1960a74a4b97SChris Mason } 196131153d81SYan Zheng 1962a74a4b97SChris Mason now = get_seconds(); 19634a9d8bdeSMiao Xie if (cur->state < TRANS_STATE_BLOCKED && 19648b87dc17SDavid Sterba (now < cur->start_time || 19658b87dc17SDavid Sterba now - cur->start_time < root->fs_info->commit_interval)) { 1966a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1967a74a4b97SChris Mason delay = HZ * 5; 1968a74a4b97SChris Mason goto sleep; 1969a74a4b97SChris Mason } 19708929ecfaSYan, Zheng transid = cur->transid; 1971a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 197256bec294SChris Mason 197379787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1974354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1975914b2007SJan Kara if (IS_ERR(trans)) { 1976354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1977914b2007SJan Kara cannot_commit = true; 197879787eaaSJeff Mahoney goto sleep; 1979914b2007SJan Kara } 19808929ecfaSYan, Zheng if (transid == trans->transid) { 198179787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 19828929ecfaSYan, Zheng } else { 19838929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 19848929ecfaSYan, Zheng } 1985a74a4b97SChris Mason sleep: 1986a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1987a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1988a74a4b97SChris Mason 19894e121c06SJosef Bacik if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, 19904e121c06SJosef Bacik &root->fs_info->fs_state))) 19914e121c06SJosef Bacik btrfs_cleanup_transaction(root); 1992a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 19938929ecfaSYan, Zheng if (!kthread_should_stop() && 1994914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1995914b2007SJan Kara cannot_commit)) 1996a74a4b97SChris Mason schedule_timeout(delay); 1997a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1998a74a4b97SChris Mason } while (!kthread_should_stop()); 1999a74a4b97SChris Mason return 0; 2000a74a4b97SChris Mason } 2001a74a4b97SChris Mason 2002af31f5e5SChris Mason /* 2003af31f5e5SChris Mason * this will find the highest generation in the array of 2004af31f5e5SChris Mason * root backups. The index of the highest array is returned, 2005af31f5e5SChris Mason * or -1 if we can't find anything. 2006af31f5e5SChris Mason * 2007af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 2008af31f5e5SChris Mason * generation of the latest root in the array with the generation 2009af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 2010af31f5e5SChris Mason */ 2011af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 2012af31f5e5SChris Mason { 2013af31f5e5SChris Mason u64 cur; 2014af31f5e5SChris Mason int newest_index = -1; 2015af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2016af31f5e5SChris Mason int i; 2017af31f5e5SChris Mason 2018af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 2019af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 2020af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 2021af31f5e5SChris Mason if (cur == newest_gen) 2022af31f5e5SChris Mason newest_index = i; 2023af31f5e5SChris Mason } 2024af31f5e5SChris Mason 2025af31f5e5SChris Mason /* check to see if we actually wrapped around */ 2026af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 2027af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 2028af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 2029af31f5e5SChris Mason if (cur == newest_gen) 2030af31f5e5SChris Mason newest_index = 0; 2031af31f5e5SChris Mason } 2032af31f5e5SChris Mason return newest_index; 2033af31f5e5SChris Mason } 2034af31f5e5SChris Mason 2035af31f5e5SChris Mason 2036af31f5e5SChris Mason /* 2037af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 2038af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 2039af31f5e5SChris Mason * field in the fs_info struct 2040af31f5e5SChris Mason */ 2041af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 2042af31f5e5SChris Mason u64 newest_gen) 2043af31f5e5SChris Mason { 2044af31f5e5SChris Mason int newest_index = -1; 2045af31f5e5SChris Mason 2046af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 2047af31f5e5SChris Mason /* if there was garbage in there, just move along */ 2048af31f5e5SChris Mason if (newest_index == -1) { 2049af31f5e5SChris Mason info->backup_root_index = 0; 2050af31f5e5SChris Mason } else { 2051af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 2052af31f5e5SChris Mason } 2053af31f5e5SChris Mason } 2054af31f5e5SChris Mason 2055af31f5e5SChris Mason /* 2056af31f5e5SChris Mason * copy all the root pointers into the super backup array. 2057af31f5e5SChris Mason * this will bump the backup pointer by one when it is 2058af31f5e5SChris Mason * done 2059af31f5e5SChris Mason */ 2060af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 2061af31f5e5SChris Mason { 2062af31f5e5SChris Mason int next_backup; 2063af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2064af31f5e5SChris Mason int last_backup; 2065af31f5e5SChris Mason 2066af31f5e5SChris Mason next_backup = info->backup_root_index; 2067af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 2068af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 2069af31f5e5SChris Mason 2070af31f5e5SChris Mason /* 2071af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 2072af31f5e5SChris Mason * this happens only at umount 2073af31f5e5SChris Mason */ 2074af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 2075af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 2076af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 2077af31f5e5SChris Mason next_backup = last_backup; 2078af31f5e5SChris Mason 2079af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 2080af31f5e5SChris Mason 2081af31f5e5SChris Mason /* 2082af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 2083af31f5e5SChris Mason * regardless of which ones we use today 2084af31f5e5SChris Mason */ 2085af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 2086af31f5e5SChris Mason 2087af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 2088af31f5e5SChris Mason 2089af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 2090af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 2091af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 2092af31f5e5SChris Mason 2093af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 2094af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 2095af31f5e5SChris Mason 2096af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 2097af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 2098af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 2099af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 2100af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 2101af31f5e5SChris Mason 2102af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 2103af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 2104af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 2105af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 2106af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 2107af31f5e5SChris Mason 21087c7e82a7SChris Mason /* 21097c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 21107c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 21117c7e82a7SChris Mason */ 21127c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 21137c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 21147c7e82a7SChris Mason info->fs_root->node->start); 2115af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 2116af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 2117af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 2118af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 21197c7e82a7SChris Mason } 2120af31f5e5SChris Mason 2121af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 2122af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 2123af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 2124af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 2125af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 2126af31f5e5SChris Mason 2127af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 2128af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 2129af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 2130af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 2131af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 2132af31f5e5SChris Mason 2133af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 2134af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 2135af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 2136af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 2137af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 2138af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 2139af31f5e5SChris Mason 2140af31f5e5SChris Mason /* 2141af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 2142af31f5e5SChris Mason * for the next commit 2143af31f5e5SChris Mason */ 2144af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 2145af31f5e5SChris Mason &info->super_for_commit->super_roots, 2146af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 2147af31f5e5SChris Mason } 2148af31f5e5SChris Mason 2149af31f5e5SChris Mason /* 2150af31f5e5SChris Mason * this copies info out of the root backup array and back into 2151af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 2152af31f5e5SChris Mason * the array, so you send it the number of backups you've already 2153af31f5e5SChris Mason * tried and the last backup index you used. 2154af31f5e5SChris Mason * 2155af31f5e5SChris Mason * this returns -1 when it has tried all the backups 2156af31f5e5SChris Mason */ 2157af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 2158af31f5e5SChris Mason struct btrfs_super_block *super, 2159af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 2160af31f5e5SChris Mason { 2161af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 2162af31f5e5SChris Mason int newest = *backup_index; 2163af31f5e5SChris Mason 2164af31f5e5SChris Mason if (*num_backups_tried == 0) { 2165af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 2166af31f5e5SChris Mason 2167af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 2168af31f5e5SChris Mason if (newest == -1) 2169af31f5e5SChris Mason return -1; 2170af31f5e5SChris Mason 2171af31f5e5SChris Mason *backup_index = newest; 2172af31f5e5SChris Mason *num_backups_tried = 1; 2173af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 2174af31f5e5SChris Mason /* we've tried all the backups, all done */ 2175af31f5e5SChris Mason return -1; 2176af31f5e5SChris Mason } else { 2177af31f5e5SChris Mason /* jump to the next oldest backup */ 2178af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 2179af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 2180af31f5e5SChris Mason *backup_index = newest; 2181af31f5e5SChris Mason *num_backups_tried += 1; 2182af31f5e5SChris Mason } 2183af31f5e5SChris Mason root_backup = super->super_roots + newest; 2184af31f5e5SChris Mason 2185af31f5e5SChris Mason btrfs_set_super_generation(super, 2186af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 2187af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 2188af31f5e5SChris Mason btrfs_set_super_root_level(super, 2189af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 2190af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 2191af31f5e5SChris Mason 2192af31f5e5SChris Mason /* 2193af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 2194af31f5e5SChris Mason * need a fsck 2195af31f5e5SChris Mason */ 2196af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 2197af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 2198af31f5e5SChris Mason return 0; 2199af31f5e5SChris Mason } 2200af31f5e5SChris Mason 22017abadb64SLiu Bo /* helper to cleanup workers */ 22027abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 22037abadb64SLiu Bo { 2204dc6e3209SQu Wenruo btrfs_destroy_workqueue(fs_info->fixup_workers); 2205afe3d242SQu Wenruo btrfs_destroy_workqueue(fs_info->delalloc_workers); 22065cdc7ad3SQu Wenruo btrfs_destroy_workqueue(fs_info->workers); 2207fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_workers); 2208fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_meta_workers); 2209fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_raid56_workers); 22108b110e39SMiao Xie btrfs_destroy_workqueue(fs_info->endio_repair_workers); 2211d05a33acSQu Wenruo btrfs_destroy_workqueue(fs_info->rmw_workers); 2212fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); 2213fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_write_workers); 2214fccb5d86SQu Wenruo btrfs_destroy_workqueue(fs_info->endio_freespace_worker); 2215a8c93d4eSQu Wenruo btrfs_destroy_workqueue(fs_info->submit_workers); 22165b3bc44eSQu Wenruo btrfs_destroy_workqueue(fs_info->delayed_workers); 2217e66f0bb1SQu Wenruo btrfs_destroy_workqueue(fs_info->caching_workers); 2218736cfa15SQu Wenruo btrfs_destroy_workqueue(fs_info->readahead_workers); 2219a44903abSQu Wenruo btrfs_destroy_workqueue(fs_info->flush_workers); 2220fc97fab0SQu Wenruo btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); 2221a79b7d4bSChris Mason btrfs_destroy_workqueue(fs_info->extent_workers); 22227abadb64SLiu Bo } 22237abadb64SLiu Bo 22242e9f5954SRashika static void free_root_extent_buffers(struct btrfs_root *root) 22252e9f5954SRashika { 22262e9f5954SRashika if (root) { 22272e9f5954SRashika free_extent_buffer(root->node); 22282e9f5954SRashika free_extent_buffer(root->commit_root); 22292e9f5954SRashika root->node = NULL; 22302e9f5954SRashika root->commit_root = NULL; 22312e9f5954SRashika } 22322e9f5954SRashika } 22332e9f5954SRashika 2234af31f5e5SChris Mason /* helper to cleanup tree roots */ 2235af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 2236af31f5e5SChris Mason { 22372e9f5954SRashika free_root_extent_buffers(info->tree_root); 2238655b09feSJosef Bacik 22392e9f5954SRashika free_root_extent_buffers(info->dev_root); 22402e9f5954SRashika free_root_extent_buffers(info->extent_root); 22412e9f5954SRashika free_root_extent_buffers(info->csum_root); 22422e9f5954SRashika free_root_extent_buffers(info->quota_root); 22432e9f5954SRashika free_root_extent_buffers(info->uuid_root); 22442e9f5954SRashika if (chunk_root) 22452e9f5954SRashika free_root_extent_buffers(info->chunk_root); 224670f6d82eSOmar Sandoval free_root_extent_buffers(info->free_space_root); 2247af31f5e5SChris Mason } 2248af31f5e5SChris Mason 2249faa2dbf0SJosef Bacik void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) 2250171f6537SJosef Bacik { 2251171f6537SJosef Bacik int ret; 2252171f6537SJosef Bacik struct btrfs_root *gang[8]; 2253171f6537SJosef Bacik int i; 2254171f6537SJosef Bacik 2255171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2256171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2257171f6537SJosef Bacik struct btrfs_root, root_list); 2258171f6537SJosef Bacik list_del(&gang[0]->root_list); 2259171f6537SJosef Bacik 226027cdeb70SMiao Xie if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { 2261cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[0]); 2262171f6537SJosef Bacik } else { 2263171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2264171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2265b0feb9d9SMiao Xie btrfs_put_fs_root(gang[0]); 2266171f6537SJosef Bacik } 2267171f6537SJosef Bacik } 2268171f6537SJosef Bacik 2269171f6537SJosef Bacik while (1) { 2270171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2271171f6537SJosef Bacik (void **)gang, 0, 2272171f6537SJosef Bacik ARRAY_SIZE(gang)); 2273171f6537SJosef Bacik if (!ret) 2274171f6537SJosef Bacik break; 2275171f6537SJosef Bacik for (i = 0; i < ret; i++) 2276cb517eabSMiao Xie btrfs_drop_and_free_fs_root(fs_info, gang[i]); 2277171f6537SJosef Bacik } 22781a4319ccSLiu Bo 22791a4319ccSLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 22801a4319ccSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 22811a4319ccSLiu Bo btrfs_destroy_pinned_extent(fs_info->tree_root, 22821a4319ccSLiu Bo fs_info->pinned_extents); 22831a4319ccSLiu Bo } 2284171f6537SJosef Bacik } 2285af31f5e5SChris Mason 2286638aa7edSEric Sandeen static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) 2287638aa7edSEric Sandeen { 2288638aa7edSEric Sandeen mutex_init(&fs_info->scrub_lock); 2289638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_running, 0); 2290638aa7edSEric Sandeen atomic_set(&fs_info->scrub_pause_req, 0); 2291638aa7edSEric Sandeen atomic_set(&fs_info->scrubs_paused, 0); 2292638aa7edSEric Sandeen atomic_set(&fs_info->scrub_cancel_req, 0); 2293638aa7edSEric Sandeen init_waitqueue_head(&fs_info->scrub_pause_wait); 2294638aa7edSEric Sandeen fs_info->scrub_workers_refcnt = 0; 2295638aa7edSEric Sandeen } 2296638aa7edSEric Sandeen 2297779a65a4SEric Sandeen static void btrfs_init_balance(struct btrfs_fs_info *fs_info) 2298779a65a4SEric Sandeen { 2299779a65a4SEric Sandeen spin_lock_init(&fs_info->balance_lock); 2300779a65a4SEric Sandeen mutex_init(&fs_info->balance_mutex); 2301779a65a4SEric Sandeen atomic_set(&fs_info->balance_running, 0); 2302779a65a4SEric Sandeen atomic_set(&fs_info->balance_pause_req, 0); 2303779a65a4SEric Sandeen atomic_set(&fs_info->balance_cancel_req, 0); 2304779a65a4SEric Sandeen fs_info->balance_ctl = NULL; 2305779a65a4SEric Sandeen init_waitqueue_head(&fs_info->balance_wait_q); 2306779a65a4SEric Sandeen } 2307779a65a4SEric Sandeen 2308f37938e0SEric Sandeen static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info, 2309f37938e0SEric Sandeen struct btrfs_root *tree_root) 2310f37938e0SEric Sandeen { 2311f37938e0SEric Sandeen fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2312f37938e0SEric Sandeen set_nlink(fs_info->btree_inode, 1); 2313f37938e0SEric Sandeen /* 2314f37938e0SEric Sandeen * we set the i_size on the btree inode to the max possible int. 2315f37938e0SEric Sandeen * the real end of the address space is determined by all of 2316f37938e0SEric Sandeen * the devices in the system 2317f37938e0SEric Sandeen */ 2318f37938e0SEric Sandeen fs_info->btree_inode->i_size = OFFSET_MAX; 2319f37938e0SEric Sandeen fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 2320f37938e0SEric Sandeen 2321f37938e0SEric Sandeen RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2322f37938e0SEric Sandeen extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2323f37938e0SEric Sandeen fs_info->btree_inode->i_mapping); 2324f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2325f37938e0SEric Sandeen extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 2326f37938e0SEric Sandeen 2327f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2328f37938e0SEric Sandeen 2329f37938e0SEric Sandeen BTRFS_I(fs_info->btree_inode)->root = tree_root; 2330f37938e0SEric Sandeen memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 2331f37938e0SEric Sandeen sizeof(struct btrfs_key)); 2332f37938e0SEric Sandeen set_bit(BTRFS_INODE_DUMMY, 2333f37938e0SEric Sandeen &BTRFS_I(fs_info->btree_inode)->runtime_flags); 2334f37938e0SEric Sandeen btrfs_insert_inode_hash(fs_info->btree_inode); 2335f37938e0SEric Sandeen } 2336f37938e0SEric Sandeen 2337ad618368SEric Sandeen static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) 2338ad618368SEric Sandeen { 2339ad618368SEric Sandeen fs_info->dev_replace.lock_owner = 0; 2340ad618368SEric Sandeen atomic_set(&fs_info->dev_replace.nesting_level, 0); 2341ad618368SEric Sandeen mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 234273beece9SLiu Bo rwlock_init(&fs_info->dev_replace.lock); 234373beece9SLiu Bo atomic_set(&fs_info->dev_replace.read_locks, 0); 234473beece9SLiu Bo atomic_set(&fs_info->dev_replace.blocking_readers, 0); 2345ad618368SEric Sandeen init_waitqueue_head(&fs_info->replace_wait); 234673beece9SLiu Bo init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); 2347ad618368SEric Sandeen } 2348ad618368SEric Sandeen 2349f9e92e40SEric Sandeen static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) 2350f9e92e40SEric Sandeen { 2351f9e92e40SEric Sandeen spin_lock_init(&fs_info->qgroup_lock); 2352f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_ioctl_lock); 2353f9e92e40SEric Sandeen fs_info->qgroup_tree = RB_ROOT; 2354f9e92e40SEric Sandeen fs_info->qgroup_op_tree = RB_ROOT; 2355f9e92e40SEric Sandeen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2356f9e92e40SEric Sandeen fs_info->qgroup_seq = 1; 2357f9e92e40SEric Sandeen fs_info->qgroup_ulist = NULL; 2358d2c609b8SJeff Mahoney fs_info->qgroup_rescan_running = false; 2359f9e92e40SEric Sandeen mutex_init(&fs_info->qgroup_rescan_lock); 2360f9e92e40SEric Sandeen } 2361f9e92e40SEric Sandeen 23622a458198SEric Sandeen static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, 23632a458198SEric Sandeen struct btrfs_fs_devices *fs_devices) 23642a458198SEric Sandeen { 23652a458198SEric Sandeen int max_active = fs_info->thread_pool_size; 23666f011058SDavid Sterba unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; 23672a458198SEric Sandeen 23682a458198SEric Sandeen fs_info->workers = 2369cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "worker", 2370cb001095SJeff Mahoney flags | WQ_HIGHPRI, max_active, 16); 23712a458198SEric Sandeen 23722a458198SEric Sandeen fs_info->delalloc_workers = 2373cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delalloc", 2374cb001095SJeff Mahoney flags, max_active, 2); 23752a458198SEric Sandeen 23762a458198SEric Sandeen fs_info->flush_workers = 2377cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "flush_delalloc", 2378cb001095SJeff Mahoney flags, max_active, 0); 23792a458198SEric Sandeen 23802a458198SEric Sandeen fs_info->caching_workers = 2381cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); 23822a458198SEric Sandeen 23832a458198SEric Sandeen /* 23842a458198SEric Sandeen * a higher idle thresh on the submit workers makes it much more 23852a458198SEric Sandeen * likely that bios will be send down in a sane order to the 23862a458198SEric Sandeen * devices 23872a458198SEric Sandeen */ 23882a458198SEric Sandeen fs_info->submit_workers = 2389cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "submit", flags, 23902a458198SEric Sandeen min_t(u64, fs_devices->num_devices, 23912a458198SEric Sandeen max_active), 64); 23922a458198SEric Sandeen 23932a458198SEric Sandeen fs_info->fixup_workers = 2394cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); 23952a458198SEric Sandeen 23962a458198SEric Sandeen /* 23972a458198SEric Sandeen * endios are largely parallel and should have a very 23982a458198SEric Sandeen * low idle thresh 23992a458198SEric Sandeen */ 24002a458198SEric Sandeen fs_info->endio_workers = 2401cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); 24022a458198SEric Sandeen fs_info->endio_meta_workers = 2403cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta", flags, 2404cb001095SJeff Mahoney max_active, 4); 24052a458198SEric Sandeen fs_info->endio_meta_write_workers = 2406cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, 2407cb001095SJeff Mahoney max_active, 2); 24082a458198SEric Sandeen fs_info->endio_raid56_workers = 2409cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, 2410cb001095SJeff Mahoney max_active, 4); 24112a458198SEric Sandeen fs_info->endio_repair_workers = 2412cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); 24132a458198SEric Sandeen fs_info->rmw_workers = 2414cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); 24152a458198SEric Sandeen fs_info->endio_write_workers = 2416cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "endio-write", flags, 2417cb001095SJeff Mahoney max_active, 2); 24182a458198SEric Sandeen fs_info->endio_freespace_worker = 2419cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "freespace-write", flags, 2420cb001095SJeff Mahoney max_active, 0); 24212a458198SEric Sandeen fs_info->delayed_workers = 2422cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, 2423cb001095SJeff Mahoney max_active, 0); 24242a458198SEric Sandeen fs_info->readahead_workers = 2425cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "readahead", flags, 2426cb001095SJeff Mahoney max_active, 2); 24272a458198SEric Sandeen fs_info->qgroup_rescan_workers = 2428cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); 24292a458198SEric Sandeen fs_info->extent_workers = 2430cb001095SJeff Mahoney btrfs_alloc_workqueue(fs_info, "extent-refs", flags, 24312a458198SEric Sandeen min_t(u64, fs_devices->num_devices, 24322a458198SEric Sandeen max_active), 8); 24332a458198SEric Sandeen 24342a458198SEric Sandeen if (!(fs_info->workers && fs_info->delalloc_workers && 24352a458198SEric Sandeen fs_info->submit_workers && fs_info->flush_workers && 24362a458198SEric Sandeen fs_info->endio_workers && fs_info->endio_meta_workers && 24372a458198SEric Sandeen fs_info->endio_meta_write_workers && 24382a458198SEric Sandeen fs_info->endio_repair_workers && 24392a458198SEric Sandeen fs_info->endio_write_workers && fs_info->endio_raid56_workers && 24402a458198SEric Sandeen fs_info->endio_freespace_worker && fs_info->rmw_workers && 24412a458198SEric Sandeen fs_info->caching_workers && fs_info->readahead_workers && 24422a458198SEric Sandeen fs_info->fixup_workers && fs_info->delayed_workers && 24432a458198SEric Sandeen fs_info->extent_workers && 24442a458198SEric Sandeen fs_info->qgroup_rescan_workers)) { 24452a458198SEric Sandeen return -ENOMEM; 24462a458198SEric Sandeen } 24472a458198SEric Sandeen 24482a458198SEric Sandeen return 0; 24492a458198SEric Sandeen } 24502a458198SEric Sandeen 245163443bf5SEric Sandeen static int btrfs_replay_log(struct btrfs_fs_info *fs_info, 245263443bf5SEric Sandeen struct btrfs_fs_devices *fs_devices) 245363443bf5SEric Sandeen { 245463443bf5SEric Sandeen int ret; 245563443bf5SEric Sandeen struct btrfs_root *tree_root = fs_info->tree_root; 245663443bf5SEric Sandeen struct btrfs_root *log_tree_root; 245763443bf5SEric Sandeen struct btrfs_super_block *disk_super = fs_info->super_copy; 245863443bf5SEric Sandeen u64 bytenr = btrfs_super_log_root(disk_super); 245963443bf5SEric Sandeen 246063443bf5SEric Sandeen if (fs_devices->rw_devices == 0) { 2461f14d104dSDavid Sterba btrfs_warn(fs_info, "log replay required on RO media"); 246263443bf5SEric Sandeen return -EIO; 246363443bf5SEric Sandeen } 246463443bf5SEric Sandeen 246574e4d827SDavid Sterba log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 246663443bf5SEric Sandeen if (!log_tree_root) 246763443bf5SEric Sandeen return -ENOMEM; 246863443bf5SEric Sandeen 246963443bf5SEric Sandeen __setup_root(tree_root->nodesize, tree_root->sectorsize, 247063443bf5SEric Sandeen tree_root->stripesize, log_tree_root, fs_info, 247163443bf5SEric Sandeen BTRFS_TREE_LOG_OBJECTID); 247263443bf5SEric Sandeen 247363443bf5SEric Sandeen log_tree_root->node = read_tree_block(tree_root, bytenr, 247463443bf5SEric Sandeen fs_info->generation + 1); 247564c043deSLiu Bo if (IS_ERR(log_tree_root->node)) { 2476f14d104dSDavid Sterba btrfs_warn(fs_info, "failed to read log tree"); 24770eeff236SLiu Bo ret = PTR_ERR(log_tree_root->node); 247864c043deSLiu Bo kfree(log_tree_root); 24790eeff236SLiu Bo return ret; 248064c043deSLiu Bo } else if (!extent_buffer_uptodate(log_tree_root->node)) { 2481f14d104dSDavid Sterba btrfs_err(fs_info, "failed to read log tree"); 248263443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 248363443bf5SEric Sandeen kfree(log_tree_root); 248463443bf5SEric Sandeen return -EIO; 248563443bf5SEric Sandeen } 248663443bf5SEric Sandeen /* returns with log_tree_root freed on success */ 248763443bf5SEric Sandeen ret = btrfs_recover_log_trees(log_tree_root); 248863443bf5SEric Sandeen if (ret) { 248934d97007SAnand Jain btrfs_handle_fs_error(tree_root->fs_info, ret, 249063443bf5SEric Sandeen "Failed to recover log tree"); 249163443bf5SEric Sandeen free_extent_buffer(log_tree_root->node); 249263443bf5SEric Sandeen kfree(log_tree_root); 249363443bf5SEric Sandeen return ret; 249463443bf5SEric Sandeen } 249563443bf5SEric Sandeen 249663443bf5SEric Sandeen if (fs_info->sb->s_flags & MS_RDONLY) { 249763443bf5SEric Sandeen ret = btrfs_commit_super(tree_root); 249863443bf5SEric Sandeen if (ret) 249963443bf5SEric Sandeen return ret; 250063443bf5SEric Sandeen } 250163443bf5SEric Sandeen 250263443bf5SEric Sandeen return 0; 250363443bf5SEric Sandeen } 250463443bf5SEric Sandeen 25054bbcaa64SEric Sandeen static int btrfs_read_roots(struct btrfs_fs_info *fs_info, 25064bbcaa64SEric Sandeen struct btrfs_root *tree_root) 25074bbcaa64SEric Sandeen { 2508a4f3d2c4SDavid Sterba struct btrfs_root *root; 25094bbcaa64SEric Sandeen struct btrfs_key location; 25104bbcaa64SEric Sandeen int ret; 25114bbcaa64SEric Sandeen 25124bbcaa64SEric Sandeen location.objectid = BTRFS_EXTENT_TREE_OBJECTID; 25134bbcaa64SEric Sandeen location.type = BTRFS_ROOT_ITEM_KEY; 25144bbcaa64SEric Sandeen location.offset = 0; 25154bbcaa64SEric Sandeen 2516a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2517a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2518a4f3d2c4SDavid Sterba return PTR_ERR(root); 2519a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2520a4f3d2c4SDavid Sterba fs_info->extent_root = root; 25214bbcaa64SEric Sandeen 25224bbcaa64SEric Sandeen location.objectid = BTRFS_DEV_TREE_OBJECTID; 2523a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2524a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2525a4f3d2c4SDavid Sterba return PTR_ERR(root); 2526a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2527a4f3d2c4SDavid Sterba fs_info->dev_root = root; 25284bbcaa64SEric Sandeen btrfs_init_devices_late(fs_info); 25294bbcaa64SEric Sandeen 25304bbcaa64SEric Sandeen location.objectid = BTRFS_CSUM_TREE_OBJECTID; 2531a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2532a4f3d2c4SDavid Sterba if (IS_ERR(root)) 2533a4f3d2c4SDavid Sterba return PTR_ERR(root); 2534a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2535a4f3d2c4SDavid Sterba fs_info->csum_root = root; 25364bbcaa64SEric Sandeen 25374bbcaa64SEric Sandeen location.objectid = BTRFS_QUOTA_TREE_OBJECTID; 2538a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2539a4f3d2c4SDavid Sterba if (!IS_ERR(root)) { 2540a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2541afcdd129SJosef Bacik set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); 2542a4f3d2c4SDavid Sterba fs_info->quota_root = root; 25434bbcaa64SEric Sandeen } 25444bbcaa64SEric Sandeen 25454bbcaa64SEric Sandeen location.objectid = BTRFS_UUID_TREE_OBJECTID; 2546a4f3d2c4SDavid Sterba root = btrfs_read_tree_root(tree_root, &location); 2547a4f3d2c4SDavid Sterba if (IS_ERR(root)) { 2548a4f3d2c4SDavid Sterba ret = PTR_ERR(root); 25494bbcaa64SEric Sandeen if (ret != -ENOENT) 25504bbcaa64SEric Sandeen return ret; 25514bbcaa64SEric Sandeen } else { 2552a4f3d2c4SDavid Sterba set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 2553a4f3d2c4SDavid Sterba fs_info->uuid_root = root; 25544bbcaa64SEric Sandeen } 25554bbcaa64SEric Sandeen 255670f6d82eSOmar Sandoval if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 255770f6d82eSOmar Sandoval location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; 255870f6d82eSOmar Sandoval root = btrfs_read_tree_root(tree_root, &location); 255970f6d82eSOmar Sandoval if (IS_ERR(root)) 256070f6d82eSOmar Sandoval return PTR_ERR(root); 256170f6d82eSOmar Sandoval set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); 256270f6d82eSOmar Sandoval fs_info->free_space_root = root; 256370f6d82eSOmar Sandoval } 256470f6d82eSOmar Sandoval 25654bbcaa64SEric Sandeen return 0; 25664bbcaa64SEric Sandeen } 25674bbcaa64SEric Sandeen 2568ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 2569dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2570dfe25020SChris Mason char *options) 2571eb60ceacSChris Mason { 2572db94535dSChris Mason u32 sectorsize; 2573db94535dSChris Mason u32 nodesize; 257487ee04ebSChris Mason u32 stripesize; 257584234f3aSYan Zheng u64 generation; 2576f2b636e8SJosef Bacik u64 features; 25773de4586cSChris Mason struct btrfs_key location; 2578a061fc8dSChris Mason struct buffer_head *bh; 25794d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2580815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2581f84a8bd6SAl Viro struct btrfs_root *tree_root; 25824d34b278SIlya Dryomov struct btrfs_root *chunk_root; 2583eb60ceacSChris Mason int ret; 2584e58ca020SYan int err = -EINVAL; 2585af31f5e5SChris Mason int num_backups_tried = 0; 2586af31f5e5SChris Mason int backup_index = 0; 25875cdc7ad3SQu Wenruo int max_active; 25884543df7eSChris Mason 258974e4d827SDavid Sterba tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 259074e4d827SDavid Sterba chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); 2591cb517eabSMiao Xie if (!tree_root || !chunk_root) { 259239279cc3SChris Mason err = -ENOMEM; 259339279cc3SChris Mason goto fail; 259439279cc3SChris Mason } 259576dda93cSYan, Zheng 259676dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 259776dda93cSYan, Zheng if (ret) { 259876dda93cSYan, Zheng err = ret; 259976dda93cSYan, Zheng goto fail; 260076dda93cSYan, Zheng } 260176dda93cSYan, Zheng 260276dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 260376dda93cSYan, Zheng if (ret) { 260476dda93cSYan, Zheng err = ret; 260576dda93cSYan, Zheng goto fail_srcu; 260676dda93cSYan, Zheng } 260776dda93cSYan, Zheng 2608908c7f19STejun Heo ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); 2609e2d84521SMiao Xie if (ret) { 2610e2d84521SMiao Xie err = ret; 2611e2d84521SMiao Xie goto fail_bdi; 2612e2d84521SMiao Xie } 261309cbfeafSKirill A. Shutemov fs_info->dirty_metadata_batch = PAGE_SIZE * 2614e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2615e2d84521SMiao Xie 2616908c7f19STejun Heo ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); 2617963d678bSMiao Xie if (ret) { 2618963d678bSMiao Xie err = ret; 2619963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2620963d678bSMiao Xie } 2621963d678bSMiao Xie 2622908c7f19STejun Heo ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); 2623c404e0dcSMiao Xie if (ret) { 2624c404e0dcSMiao Xie err = ret; 2625c404e0dcSMiao Xie goto fail_delalloc_bytes; 2626c404e0dcSMiao Xie } 2627c404e0dcSMiao Xie 262876dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 262976dda93cSYan, Zheng if (!fs_info->btree_inode) { 263076dda93cSYan, Zheng err = -ENOMEM; 2631c404e0dcSMiao Xie goto fail_bio_counter; 263276dda93cSYan, Zheng } 263376dda93cSYan, Zheng 2634a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 26351561dedaSMiao Xie 263676dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 2637f28491e0SJosef Bacik INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); 26388fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2639facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 264024bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2641eb73c1b7SMiao Xie INIT_LIST_HEAD(&fs_info->delalloc_roots); 264211833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 2643eb73c1b7SMiao Xie spin_lock_init(&fs_info->delalloc_root_lock); 2644a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 264576dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 264624bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 26474cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 26482bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2649f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2650ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2651fcebe456SJosef Bacik spin_lock_init(&fs_info->qgroup_op_lock); 2652f28491e0SJosef Bacik spin_lock_init(&fs_info->buffer_lock); 265347ab2a6cSJosef Bacik spin_lock_init(&fs_info->unused_bgs_lock); 2654f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 2655d7c15171SZhao Lei mutex_init(&fs_info->unused_bg_unpin_mutex); 265667c5e7d4SFilipe Manana mutex_init(&fs_info->delete_unused_bgs_mutex); 26577585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2658573bfb72SMiao Xie mutex_init(&fs_info->delalloc_root_mutex); 2659c2d6cb16SFilipe Manana mutex_init(&fs_info->cleaner_delayed_iput_mutex); 2660de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 266119c00ddcSChris Mason 26620b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 26636324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2664f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 266547ab2a6cSJosef Bacik INIT_LIST_HEAD(&fs_info->unused_bgs); 26660b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 266766d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 266866d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 266966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 267066d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 267166d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 267266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 267366d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 267466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 267566d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2676cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2677771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 26788c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 26790986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 26804cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2681fcebe456SJosef Bacik atomic_set(&fs_info->qgroup_op_seq, 0); 26822fefd558SZhao Lei atomic_set(&fs_info->reada_works_cnt, 0); 2683fc36ed7eSJan Schmidt atomic64_set(&fs_info->tree_mod_seq, 0); 26849e7cc91aSWang Xiaoguang fs_info->fs_frozen = 0; 2685e20d96d6SChris Mason fs_info->sb = sb; 268695ac567aSFilipe David Borba Manana fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; 26879ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 26884cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 26892bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2690f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 26918b87dc17SDavid Sterba fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; 2692f8c269d7SDavid Sterba fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ 269390519d66SArne Jansen /* readahead state */ 2694d0164adcSMel Gorman INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); 269590519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 2696c8b97818SChris Mason 2697b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2698b34b086cSChris Mason num_online_cpus() + 2, 8); 26990afbaf8cSChris Mason 2700199c2a9cSMiao Xie INIT_LIST_HEAD(&fs_info->ordered_roots); 2701199c2a9cSMiao Xie spin_lock_init(&fs_info->ordered_root_lock); 270216cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 270374e4d827SDavid Sterba GFP_KERNEL); 270416cdcec7SMiao Xie if (!fs_info->delayed_root) { 270516cdcec7SMiao Xie err = -ENOMEM; 270616cdcec7SMiao Xie goto fail_iput; 270716cdcec7SMiao Xie } 270816cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 27093eaa2885SChris Mason 2710638aa7edSEric Sandeen btrfs_init_scrub(fs_info); 271121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 271221adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 271321adbd5cSStefan Behrens #endif 2714779a65a4SEric Sandeen btrfs_init_balance(fs_info); 271521c7e756SMiao Xie btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); 2716a2de733cSArne Jansen 2717a061fc8dSChris Mason sb->s_blocksize = 4096; 2718a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 271932a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 2720a061fc8dSChris Mason 2721f37938e0SEric Sandeen btrfs_init_btree_inode(fs_info, tree_root); 272239279cc3SChris Mason 2723e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 27246bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2725a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2726925baeddSChris Mason 272711833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2728f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 272911833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2730f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 273111833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2732afcdd129SJosef Bacik set_bit(BTRFS_FS_BARRIER, &fs_info->flags); 2733509659cdSChris Mason 27345a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 273579154b1bSChris Mason mutex_init(&fs_info->tree_log_mutex); 2736925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2737a74a4b97SChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2738a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 27397d9eb12cSChris Mason mutex_init(&fs_info->volume_mutex); 27401bbc621eSChris Mason mutex_init(&fs_info->ro_block_group_mutex); 27419e351cc8SJosef Bacik init_rwsem(&fs_info->commit_root_sem); 2742c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 274376dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2744803b2f54SStefan Behrens sema_init(&fs_info->uuid_tree_rescan_sem, 1); 2745fa9c0d79SChris Mason 2746ad618368SEric Sandeen btrfs_init_dev_replace_locks(fs_info); 2747f9e92e40SEric Sandeen btrfs_init_qgroup(fs_info); 2748416ac51dSArne Jansen 2749fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2750fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2751fa9c0d79SChris Mason 2752e6dcd2dcSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 2753f9295749SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2754bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 27554854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 27563768f368SChris Mason 275704216820SFilipe Manana INIT_LIST_HEAD(&fs_info->pinned_chunks); 275804216820SFilipe Manana 275953b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 276053b381b3SDavid Woodhouse if (ret) { 276183c8266aSDavid Sterba err = ret; 276253b381b3SDavid Woodhouse goto fail_alloc; 276353b381b3SDavid Woodhouse } 276453b381b3SDavid Woodhouse 2765707e8a07SDavid Sterba __setup_root(4096, 4096, 4096, tree_root, 27662c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 27677eccb903SChris Mason 27683c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 27691104a885SDavid Sterba 27701104a885SDavid Sterba /* 27711104a885SDavid Sterba * Read super block and check the signature bytes only 27721104a885SDavid Sterba */ 2773a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 277492fc03fbSAnand Jain if (IS_ERR(bh)) { 277592fc03fbSAnand Jain err = PTR_ERR(bh); 277616cdcec7SMiao Xie goto fail_alloc; 277720b45077SDave Young } 277839279cc3SChris Mason 27791104a885SDavid Sterba /* 27801104a885SDavid Sterba * We want to check superblock checksum, the type is stored inside. 27811104a885SDavid Sterba * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). 27821104a885SDavid Sterba */ 27831104a885SDavid Sterba if (btrfs_check_super_csum(bh->b_data)) { 278405135f59SDavid Sterba btrfs_err(fs_info, "superblock checksum mismatch"); 27851104a885SDavid Sterba err = -EINVAL; 2786b2acdddfSAnand Jain brelse(bh); 27871104a885SDavid Sterba goto fail_alloc; 27881104a885SDavid Sterba } 27891104a885SDavid Sterba 27901104a885SDavid Sterba /* 27911104a885SDavid Sterba * super_copy is zeroed at allocation time and we never touch the 27921104a885SDavid Sterba * following bytes up to INFO_SIZE, the checksum is calculated from 27931104a885SDavid Sterba * the whole block of INFO_SIZE 27941104a885SDavid Sterba */ 27956c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 27966c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 27976c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2798a061fc8dSChris Mason brelse(bh); 27995f39d397SChris Mason 28006c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 28010b86a832SChris Mason 28021104a885SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 28031104a885SDavid Sterba if (ret) { 280405135f59SDavid Sterba btrfs_err(fs_info, "superblock contains fatal errors"); 28051104a885SDavid Sterba err = -EINVAL; 28061104a885SDavid Sterba goto fail_alloc; 28071104a885SDavid Sterba } 28081104a885SDavid Sterba 28096c41761fSDavid Sterba disk_super = fs_info->super_copy; 28100f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 281116cdcec7SMiao Xie goto fail_alloc; 28120f7d52f4SChris Mason 2813acce952bSliubo /* check FS state, whether FS is broken. */ 281487533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 281587533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2816acce952bSliubo 281775e7cb7fSLiu Bo /* 2818af31f5e5SChris Mason * run through our array of backup supers and setup 2819af31f5e5SChris Mason * our ring pointer to the oldest one 2820af31f5e5SChris Mason */ 2821af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2822af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2823af31f5e5SChris Mason 2824af31f5e5SChris Mason /* 282575e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 282675e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 282775e7cb7fSLiu Bo */ 282875e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 282975e7cb7fSLiu Bo 283096da0919SQu Wenruo ret = btrfs_parse_options(tree_root, options, sb->s_flags); 28312b82032cSYan Zheng if (ret) { 28322b82032cSYan Zheng err = ret; 283316cdcec7SMiao Xie goto fail_alloc; 28342b82032cSYan Zheng } 2835dfe25020SChris Mason 2836f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2837f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2838f2b636e8SJosef Bacik if (features) { 283905135f59SDavid Sterba btrfs_err(fs_info, 284005135f59SDavid Sterba "cannot mount because of unsupported optional features (%llx)", 2841c1c9ff7cSGeert Uytterhoeven features); 2842f2b636e8SJosef Bacik err = -EINVAL; 284316cdcec7SMiao Xie goto fail_alloc; 2844f2b636e8SJosef Bacik } 2845f2b636e8SJosef Bacik 28465d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 28475d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 284869e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2849a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2850727011e0SChris Mason 28513173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 285205135f59SDavid Sterba btrfs_info(fs_info, "has skinny extents"); 28533173a18fSJosef Bacik 2854727011e0SChris Mason /* 2855727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2856727011e0SChris Mason * they are bigger than the page size 2857727011e0SChris Mason */ 285809cbfeafSKirill A. Shutemov if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { 2859727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 286005135f59SDavid Sterba btrfs_info(fs_info, 286105135f59SDavid Sterba "flagging fs with big metadata feature"); 2862727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2863727011e0SChris Mason } 2864727011e0SChris Mason 2865bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2866bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2867b7f67055SChandan Rajendra stripesize = sectorsize; 2868707e8a07SDavid Sterba fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); 2869963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2870bc3f116fSChris Mason 2871bc3f116fSChris Mason /* 2872bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2873bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2874bc3f116fSChris Mason */ 2875bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2876707e8a07SDavid Sterba (sectorsize != nodesize)) { 287705135f59SDavid Sterba btrfs_err(fs_info, 287805135f59SDavid Sterba "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", 287905135f59SDavid Sterba nodesize, sectorsize); 2880bc3f116fSChris Mason goto fail_alloc; 2881bc3f116fSChris Mason } 2882bc3f116fSChris Mason 2883ceda0864SMiao Xie /* 2884ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2885ceda0864SMiao Xie * update the flag. 2886ceda0864SMiao Xie */ 28875d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 28885d4f98a2SYan Zheng 2889f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2890f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2891f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 289205135f59SDavid Sterba btrfs_err(fs_info, 289305135f59SDavid Sterba "cannot mount read-write because of unsupported optional features (%llx)", 2894c1c9ff7cSGeert Uytterhoeven features); 2895f2b636e8SJosef Bacik err = -EINVAL; 289616cdcec7SMiao Xie goto fail_alloc; 2897f2b636e8SJosef Bacik } 289861d92c32SChris Mason 28995cdc7ad3SQu Wenruo max_active = fs_info->thread_pool_size; 290061d92c32SChris Mason 29012a458198SEric Sandeen ret = btrfs_init_workqueues(fs_info, fs_devices); 29022a458198SEric Sandeen if (ret) { 29032a458198SEric Sandeen err = ret; 29040dc3b84aSJosef Bacik goto fail_sb_buffer; 29050dc3b84aSJosef Bacik } 29064543df7eSChris Mason 29074575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2908c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 290909cbfeafSKirill A. Shutemov SZ_4M / PAGE_SIZE); 29104575c9ccSChris Mason 2911db94535dSChris Mason tree_root->nodesize = nodesize; 2912db94535dSChris Mason tree_root->sectorsize = sectorsize; 291387ee04ebSChris Mason tree_root->stripesize = stripesize; 2914a061fc8dSChris Mason 2915a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2916a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2917db94535dSChris Mason 2918925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2919e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2920925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 292184eed90fSChris Mason if (ret) { 292205135f59SDavid Sterba btrfs_err(fs_info, "failed to read the system array: %d", ret); 29235d4f98a2SYan Zheng goto fail_sb_buffer; 292484eed90fSChris Mason } 29250b86a832SChris Mason 292684234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 29270b86a832SChris Mason 2928707e8a07SDavid Sterba __setup_root(nodesize, sectorsize, stripesize, chunk_root, 2929707e8a07SDavid Sterba fs_info, BTRFS_CHUNK_TREE_OBJECTID); 29300b86a832SChris Mason 29310b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 29320b86a832SChris Mason btrfs_super_chunk_root(disk_super), 2933ce86cd59SDavid Sterba generation); 293464c043deSLiu Bo if (IS_ERR(chunk_root->node) || 293564c043deSLiu Bo !extent_buffer_uptodate(chunk_root->node)) { 293605135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk root"); 2937e5fffbacSchandan if (!IS_ERR(chunk_root->node)) 2938e5fffbacSchandan free_extent_buffer(chunk_root->node); 293995ab1f64SZhao Lei chunk_root->node = NULL; 2940af31f5e5SChris Mason goto fail_tree_roots; 294183121942SDavid Woodhouse } 29425d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 29435d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 29440b86a832SChris Mason 2945e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2946b308bc2fSGeert Uytterhoeven btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); 2947e17cade2SChris Mason 29480b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 29492b82032cSYan Zheng if (ret) { 295005135f59SDavid Sterba btrfs_err(fs_info, "failed to read chunk tree: %d", ret); 2951af31f5e5SChris Mason goto fail_tree_roots; 29522b82032cSYan Zheng } 29530b86a832SChris Mason 29548dabb742SStefan Behrens /* 29558dabb742SStefan Behrens * keep the device that is marked to be the target device for the 29568dabb742SStefan Behrens * dev_replace procedure 29578dabb742SStefan Behrens */ 29589eaed21eSEric Sandeen btrfs_close_extra_devices(fs_devices, 0); 2959dfe25020SChris Mason 2960a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 296105135f59SDavid Sterba btrfs_err(fs_info, "failed to read devices"); 2962a6b0d5c8SChris Mason goto fail_tree_roots; 2963a6b0d5c8SChris Mason } 2964a6b0d5c8SChris Mason 2965af31f5e5SChris Mason retry_root_backup: 296684234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 29670b86a832SChris Mason 2968e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2969db94535dSChris Mason btrfs_super_root(disk_super), 2970ce86cd59SDavid Sterba generation); 297164c043deSLiu Bo if (IS_ERR(tree_root->node) || 297264c043deSLiu Bo !extent_buffer_uptodate(tree_root->node)) { 297305135f59SDavid Sterba btrfs_warn(fs_info, "failed to read tree root"); 2974e5fffbacSchandan if (!IS_ERR(tree_root->node)) 2975e5fffbacSchandan free_extent_buffer(tree_root->node); 297695ab1f64SZhao Lei tree_root->node = NULL; 2977af31f5e5SChris Mason goto recovery_tree_root; 297883121942SDavid Woodhouse } 2979af31f5e5SChris Mason 29805d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 29815d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 298269e9c6c6SStefan Behrens btrfs_set_root_refs(&tree_root->root_item, 1); 2983db94535dSChris Mason 2984f32e48e9SChandan Rajendra mutex_lock(&tree_root->objectid_mutex); 2985f32e48e9SChandan Rajendra ret = btrfs_find_highest_objectid(tree_root, 2986f32e48e9SChandan Rajendra &tree_root->highest_objectid); 2987f32e48e9SChandan Rajendra if (ret) { 2988f32e48e9SChandan Rajendra mutex_unlock(&tree_root->objectid_mutex); 2989f32e48e9SChandan Rajendra goto recovery_tree_root; 2990f32e48e9SChandan Rajendra } 2991f32e48e9SChandan Rajendra 2992f32e48e9SChandan Rajendra ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); 2993f32e48e9SChandan Rajendra 2994f32e48e9SChandan Rajendra mutex_unlock(&tree_root->objectid_mutex); 2995f32e48e9SChandan Rajendra 29964bbcaa64SEric Sandeen ret = btrfs_read_roots(fs_info, tree_root); 29974bbcaa64SEric Sandeen if (ret) 2998af31f5e5SChris Mason goto recovery_tree_root; 2999f7a81ea4SStefan Behrens 30008929ecfaSYan, Zheng fs_info->generation = generation; 30018929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 30028929ecfaSYan, Zheng 300368310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 300468310a5eSIlya Dryomov if (ret) { 300505135f59SDavid Sterba btrfs_err(fs_info, "failed to recover balance: %d", ret); 300668310a5eSIlya Dryomov goto fail_block_groups; 300768310a5eSIlya Dryomov } 300868310a5eSIlya Dryomov 3009733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 3010733f4fbbSStefan Behrens if (ret) { 301105135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_stats: %d", ret); 3012733f4fbbSStefan Behrens goto fail_block_groups; 3013733f4fbbSStefan Behrens } 3014733f4fbbSStefan Behrens 30158dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 30168dabb742SStefan Behrens if (ret) { 301705135f59SDavid Sterba btrfs_err(fs_info, "failed to init dev_replace: %d", ret); 30188dabb742SStefan Behrens goto fail_block_groups; 30198dabb742SStefan Behrens } 30208dabb742SStefan Behrens 30219eaed21eSEric Sandeen btrfs_close_extra_devices(fs_devices, 1); 30228dabb742SStefan Behrens 3023b7c35e81SAnand Jain ret = btrfs_sysfs_add_fsid(fs_devices, NULL); 3024b7c35e81SAnand Jain if (ret) { 302505135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", 302605135f59SDavid Sterba ret); 3027b7c35e81SAnand Jain goto fail_block_groups; 3028b7c35e81SAnand Jain } 3029b7c35e81SAnand Jain 3030b7c35e81SAnand Jain ret = btrfs_sysfs_add_device(fs_devices); 3031b7c35e81SAnand Jain if (ret) { 303205135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs device interface: %d", 303305135f59SDavid Sterba ret); 3034b7c35e81SAnand Jain goto fail_fsdev_sysfs; 3035b7c35e81SAnand Jain } 3036b7c35e81SAnand Jain 303796f3136eSAnand Jain ret = btrfs_sysfs_add_mounted(fs_info); 30385ac1d209SJeff Mahoney if (ret) { 303905135f59SDavid Sterba btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); 3040b7c35e81SAnand Jain goto fail_fsdev_sysfs; 30415ac1d209SJeff Mahoney } 30425ac1d209SJeff Mahoney 3043c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 3044c59021f8Sliubo if (ret) { 304505135f59SDavid Sterba btrfs_err(fs_info, "failed to initialize space info: %d", ret); 30462365dd3cSAnand Jain goto fail_sysfs; 3047c59021f8Sliubo } 3048c59021f8Sliubo 30494bbcaa64SEric Sandeen ret = btrfs_read_block_groups(fs_info->extent_root); 30501b1d1f66SJosef Bacik if (ret) { 305105135f59SDavid Sterba btrfs_err(fs_info, "failed to read block groups: %d", ret); 30522365dd3cSAnand Jain goto fail_sysfs; 30531b1d1f66SJosef Bacik } 30545af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 30555af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 3056292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 3057292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 3058292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 305905135f59SDavid Sterba btrfs_warn(fs_info, 306005135f59SDavid Sterba "missing devices (%llu) exceeds the limit (%d), writeable mount is not allowed", 306178fa1770SZhao Lei fs_info->fs_devices->missing_devices, 306278fa1770SZhao Lei fs_info->num_tolerated_disk_barrier_failures); 30632365dd3cSAnand Jain goto fail_sysfs; 3064292fd7fcSStefan Behrens } 30659078a3e1SChris Mason 3066a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 3067a74a4b97SChris Mason "btrfs-cleaner"); 306857506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 30692365dd3cSAnand Jain goto fail_sysfs; 3070a74a4b97SChris Mason 3071a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 3072a74a4b97SChris Mason tree_root, 3073a74a4b97SChris Mason "btrfs-transaction"); 307457506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 30753f157a2fSChris Mason goto fail_cleaner; 3076a74a4b97SChris Mason 30773cdde224SJeff Mahoney if (!btrfs_test_opt(tree_root->fs_info, SSD) && 30783cdde224SJeff Mahoney !btrfs_test_opt(tree_root->fs_info, NOSSD) && 3079c289811cSChris Mason !fs_info->fs_devices->rotating) { 308005135f59SDavid Sterba btrfs_info(fs_info, "detected SSD devices, enabling SSD mode"); 3081c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 3082c289811cSChris Mason } 3083c289811cSChris Mason 3084572d9ab7SDavid Sterba /* 308501327610SNicholas D Steeves * Mount does not set all options immediately, we can do it now and do 3086572d9ab7SDavid Sterba * not have to wait for transaction commit 3087572d9ab7SDavid Sterba */ 3088572d9ab7SDavid Sterba btrfs_apply_pending_changes(fs_info); 30893818aea2SQu Wenruo 309021adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 30913cdde224SJeff Mahoney if (btrfs_test_opt(tree_root->fs_info, CHECK_INTEGRITY)) { 309221adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 30933cdde224SJeff Mahoney btrfs_test_opt(tree_root->fs_info, 309421adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 309521adbd5cSStefan Behrens 1 : 0, 309621adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 309721adbd5cSStefan Behrens if (ret) 309805135f59SDavid Sterba btrfs_warn(fs_info, 309905135f59SDavid Sterba "failed to initialize integrity check module: %d", 310005135f59SDavid Sterba ret); 310121adbd5cSStefan Behrens } 310221adbd5cSStefan Behrens #endif 3103bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 3104bcef60f2SArne Jansen if (ret) 3105bcef60f2SArne Jansen goto fail_trans_kthread; 310621adbd5cSStefan Behrens 310796da0919SQu Wenruo /* do not make disk changes in broken FS or nologreplay is given */ 310896da0919SQu Wenruo if (btrfs_super_log_root(disk_super) != 0 && 31093cdde224SJeff Mahoney !btrfs_test_opt(tree_root->fs_info, NOLOGREPLAY)) { 311063443bf5SEric Sandeen ret = btrfs_replay_log(fs_info, fs_devices); 311179787eaaSJeff Mahoney if (ret) { 311263443bf5SEric Sandeen err = ret; 311328c16cbbSWang Shilong goto fail_qgroup; 3114e556ce2cSYan Zheng } 3115e02119d5SChris Mason } 31161a40e23bSZheng Yan 311776dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 311879787eaaSJeff Mahoney if (ret) 311928c16cbbSWang Shilong goto fail_qgroup; 312076dda93cSYan, Zheng 31217c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 3122d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 312344c44af2SIlya Dryomov if (ret) 312428c16cbbSWang Shilong goto fail_qgroup; 312590c711abSZygo Blaxell 312690c711abSZygo Blaxell mutex_lock(&fs_info->cleaner_mutex); 31275d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 312890c711abSZygo Blaxell mutex_unlock(&fs_info->cleaner_mutex); 3129d7ce5843SMiao Xie if (ret < 0) { 313005135f59SDavid Sterba btrfs_warn(fs_info, "failed to recover relocation: %d", 313105135f59SDavid Sterba ret); 3132d7ce5843SMiao Xie err = -EINVAL; 3133bcef60f2SArne Jansen goto fail_qgroup; 3134d7ce5843SMiao Xie } 31357c2ca468SChris Mason } 31361a40e23bSZheng Yan 31373de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 31383de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 3139cb517eabSMiao Xie location.offset = 0; 31403de4586cSChris Mason 31413de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 31423140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 31433140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 3144bcef60f2SArne Jansen goto fail_qgroup; 31453140c9a3SDan Carpenter } 3146c289811cSChris Mason 31472b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 31482b6ba629SIlya Dryomov return 0; 31492b6ba629SIlya Dryomov 31503cdde224SJeff Mahoney if (btrfs_test_opt(tree_root->fs_info, FREE_SPACE_TREE) && 3151511711afSChris Mason !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 315205135f59SDavid Sterba btrfs_info(fs_info, "creating free space tree"); 3153511711afSChris Mason ret = btrfs_create_free_space_tree(fs_info); 3154511711afSChris Mason if (ret) { 315505135f59SDavid Sterba btrfs_warn(fs_info, 315605135f59SDavid Sterba "failed to create free space tree: %d", ret); 3157511711afSChris Mason close_ctree(tree_root); 3158511711afSChris Mason return ret; 3159511711afSChris Mason } 3160511711afSChris Mason } 3161511711afSChris Mason 3162e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 31632b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 31642b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 31652b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 31662b6ba629SIlya Dryomov close_ctree(tree_root); 31672b6ba629SIlya Dryomov return ret; 31682b6ba629SIlya Dryomov } 3169e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 317059641015SIlya Dryomov 31712b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 31722b6ba629SIlya Dryomov if (ret) { 317305135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume balance: %d", ret); 317466b4ffd1SJosef Bacik close_ctree(tree_root); 31752b6ba629SIlya Dryomov return ret; 3176e3acc2a6SJosef Bacik } 3177e3acc2a6SJosef Bacik 31788dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 31798dabb742SStefan Behrens if (ret) { 318005135f59SDavid Sterba btrfs_warn(fs_info, "failed to resume device replace: %d", ret); 31818dabb742SStefan Behrens close_ctree(tree_root); 31828dabb742SStefan Behrens return ret; 31838dabb742SStefan Behrens } 31848dabb742SStefan Behrens 3185b382a324SJan Schmidt btrfs_qgroup_rescan_resume(fs_info); 3186b382a324SJan Schmidt 31873cdde224SJeff Mahoney if (btrfs_test_opt(tree_root->fs_info, CLEAR_CACHE) && 318870f6d82eSOmar Sandoval btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { 318905135f59SDavid Sterba btrfs_info(fs_info, "clearing free space tree"); 319070f6d82eSOmar Sandoval ret = btrfs_clear_free_space_tree(fs_info); 319170f6d82eSOmar Sandoval if (ret) { 319205135f59SDavid Sterba btrfs_warn(fs_info, 319305135f59SDavid Sterba "failed to clear free space tree: %d", ret); 319470f6d82eSOmar Sandoval close_ctree(tree_root); 319570f6d82eSOmar Sandoval return ret; 319670f6d82eSOmar Sandoval } 319770f6d82eSOmar Sandoval } 319870f6d82eSOmar Sandoval 31994bbcaa64SEric Sandeen if (!fs_info->uuid_root) { 320005135f59SDavid Sterba btrfs_info(fs_info, "creating UUID tree"); 3201f7a81ea4SStefan Behrens ret = btrfs_create_uuid_tree(fs_info); 3202f7a81ea4SStefan Behrens if (ret) { 320305135f59SDavid Sterba btrfs_warn(fs_info, 320405135f59SDavid Sterba "failed to create the UUID tree: %d", ret); 3205f7a81ea4SStefan Behrens close_ctree(tree_root); 3206f7a81ea4SStefan Behrens return ret; 3207f7a81ea4SStefan Behrens } 32083cdde224SJeff Mahoney } else if (btrfs_test_opt(tree_root->fs_info, RESCAN_UUID_TREE) || 32094bbcaa64SEric Sandeen fs_info->generation != 32104bbcaa64SEric Sandeen btrfs_super_uuid_tree_generation(disk_super)) { 321105135f59SDavid Sterba btrfs_info(fs_info, "checking UUID tree"); 321270f80175SStefan Behrens ret = btrfs_check_uuid_tree(fs_info); 321370f80175SStefan Behrens if (ret) { 321405135f59SDavid Sterba btrfs_warn(fs_info, 321505135f59SDavid Sterba "failed to check the UUID tree: %d", ret); 321670f80175SStefan Behrens close_ctree(tree_root); 321770f80175SStefan Behrens return ret; 321870f80175SStefan Behrens } 321970f80175SStefan Behrens } else { 3220afcdd129SJosef Bacik set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); 3221f7a81ea4SStefan Behrens } 3222afcdd129SJosef Bacik set_bit(BTRFS_FS_OPEN, &fs_info->flags); 322347ab2a6cSJosef Bacik 32248dcddfa0SQu Wenruo /* 32258dcddfa0SQu Wenruo * backuproot only affect mount behavior, and if open_ctree succeeded, 32268dcddfa0SQu Wenruo * no need to keep the flag 32278dcddfa0SQu Wenruo */ 32288dcddfa0SQu Wenruo btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); 32298dcddfa0SQu Wenruo 3230ad2b2c80SAl Viro return 0; 323139279cc3SChris Mason 3232bcef60f2SArne Jansen fail_qgroup: 3233bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 32347c2ca468SChris Mason fail_trans_kthread: 32357c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 323654067ae9SJosef Bacik btrfs_cleanup_transaction(fs_info->tree_root); 3237faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 32383f157a2fSChris Mason fail_cleaner: 3239a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 32407c2ca468SChris Mason 32417c2ca468SChris Mason /* 32427c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 32437c2ca468SChris Mason * kthreads 32447c2ca468SChris Mason */ 32457c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 32467c2ca468SChris Mason 32472365dd3cSAnand Jain fail_sysfs: 32486618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 32492365dd3cSAnand Jain 3250b7c35e81SAnand Jain fail_fsdev_sysfs: 3251b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 3252b7c35e81SAnand Jain 32531b1d1f66SJosef Bacik fail_block_groups: 325454067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 32551b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 3256af31f5e5SChris Mason 3257af31f5e5SChris Mason fail_tree_roots: 3258af31f5e5SChris Mason free_root_pointers(fs_info, 1); 32592b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 3260af31f5e5SChris Mason 326139279cc3SChris Mason fail_sb_buffer: 32627abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 326316cdcec7SMiao Xie fail_alloc: 32644543df7eSChris Mason fail_iput: 3265586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 3266586e46e2SIlya Dryomov 32674543df7eSChris Mason iput(fs_info->btree_inode); 3268c404e0dcSMiao Xie fail_bio_counter: 3269c404e0dcSMiao Xie percpu_counter_destroy(&fs_info->bio_counter); 3270963d678bSMiao Xie fail_delalloc_bytes: 3271963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3272e2d84521SMiao Xie fail_dirty_metadata_bytes: 3273e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3274ad081f14SJens Axboe fail_bdi: 32757e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 327676dda93cSYan, Zheng fail_srcu: 327776dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 32787e662854SQinghuang Feng fail: 327953b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 3280586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 3281ad2b2c80SAl Viro return err; 3282af31f5e5SChris Mason 3283af31f5e5SChris Mason recovery_tree_root: 32843cdde224SJeff Mahoney if (!btrfs_test_opt(tree_root->fs_info, USEBACKUPROOT)) 3285af31f5e5SChris Mason goto fail_tree_roots; 3286af31f5e5SChris Mason 3287af31f5e5SChris Mason free_root_pointers(fs_info, 0); 3288af31f5e5SChris Mason 3289af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 3290af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 3291af31f5e5SChris Mason 3292af31f5e5SChris Mason /* we can't trust the free space cache either */ 3293af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 3294af31f5e5SChris Mason 3295af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 3296af31f5e5SChris Mason &num_backups_tried, &backup_index); 3297af31f5e5SChris Mason if (ret == -1) 3298af31f5e5SChris Mason goto fail_block_groups; 3299af31f5e5SChris Mason goto retry_root_backup; 3300eb60ceacSChris Mason } 3301eb60ceacSChris Mason 3302f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 3303f2984462SChris Mason { 3304f2984462SChris Mason if (uptodate) { 3305f2984462SChris Mason set_buffer_uptodate(bh); 3306f2984462SChris Mason } else { 3307442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 3308442a4f63SStefan Behrens bh->b_private; 3309442a4f63SStefan Behrens 3310b14af3b4SDavid Sterba btrfs_warn_rl_in_rcu(device->dev_root->fs_info, 3311b14af3b4SDavid Sterba "lost page write due to IO error on %s", 3312606686eeSJosef Bacik rcu_str_deref(device->name)); 331301327610SNicholas D Steeves /* note, we don't set_buffer_write_io_error because we have 33141259ab75SChris Mason * our own ways of dealing with the IO errors 33151259ab75SChris Mason */ 3316f2984462SChris Mason clear_buffer_uptodate(bh); 3317442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 3318f2984462SChris Mason } 3319f2984462SChris Mason unlock_buffer(bh); 3320f2984462SChris Mason put_bh(bh); 3321f2984462SChris Mason } 3322f2984462SChris Mason 332329c36d72SAnand Jain int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, 332429c36d72SAnand Jain struct buffer_head **bh_ret) 332529c36d72SAnand Jain { 332629c36d72SAnand Jain struct buffer_head *bh; 332729c36d72SAnand Jain struct btrfs_super_block *super; 332829c36d72SAnand Jain u64 bytenr; 332929c36d72SAnand Jain 333029c36d72SAnand Jain bytenr = btrfs_sb_offset(copy_num); 333129c36d72SAnand Jain if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) 333229c36d72SAnand Jain return -EINVAL; 333329c36d72SAnand Jain 333429c36d72SAnand Jain bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE); 333529c36d72SAnand Jain /* 333629c36d72SAnand Jain * If we fail to read from the underlying devices, as of now 333729c36d72SAnand Jain * the best option we have is to mark it EIO. 333829c36d72SAnand Jain */ 333929c36d72SAnand Jain if (!bh) 334029c36d72SAnand Jain return -EIO; 334129c36d72SAnand Jain 334229c36d72SAnand Jain super = (struct btrfs_super_block *)bh->b_data; 334329c36d72SAnand Jain if (btrfs_super_bytenr(super) != bytenr || 334429c36d72SAnand Jain btrfs_super_magic(super) != BTRFS_MAGIC) { 334529c36d72SAnand Jain brelse(bh); 334629c36d72SAnand Jain return -EINVAL; 334729c36d72SAnand Jain } 334829c36d72SAnand Jain 334929c36d72SAnand Jain *bh_ret = bh; 335029c36d72SAnand Jain return 0; 335129c36d72SAnand Jain } 335229c36d72SAnand Jain 335329c36d72SAnand Jain 3354a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 3355a512bbf8SYan Zheng { 3356a512bbf8SYan Zheng struct buffer_head *bh; 3357a512bbf8SYan Zheng struct buffer_head *latest = NULL; 3358a512bbf8SYan Zheng struct btrfs_super_block *super; 3359a512bbf8SYan Zheng int i; 3360a512bbf8SYan Zheng u64 transid = 0; 336192fc03fbSAnand Jain int ret = -EINVAL; 3362a512bbf8SYan Zheng 3363a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 3364a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 3365a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 3366a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 3367a512bbf8SYan Zheng */ 3368a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 336929c36d72SAnand Jain ret = btrfs_read_dev_one_super(bdev, i, &bh); 337029c36d72SAnand Jain if (ret) 3371a512bbf8SYan Zheng continue; 3372a512bbf8SYan Zheng 3373a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 3374a512bbf8SYan Zheng 3375a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 3376a512bbf8SYan Zheng brelse(latest); 3377a512bbf8SYan Zheng latest = bh; 3378a512bbf8SYan Zheng transid = btrfs_super_generation(super); 3379a512bbf8SYan Zheng } else { 3380a512bbf8SYan Zheng brelse(bh); 3381a512bbf8SYan Zheng } 3382a512bbf8SYan Zheng } 338392fc03fbSAnand Jain 338492fc03fbSAnand Jain if (!latest) 338592fc03fbSAnand Jain return ERR_PTR(ret); 338692fc03fbSAnand Jain 3387a512bbf8SYan Zheng return latest; 3388a512bbf8SYan Zheng } 3389a512bbf8SYan Zheng 33904eedeb75SHisashi Hifumi /* 33914eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 33924eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 33934eedeb75SHisashi Hifumi * we write are pinned. 33944eedeb75SHisashi Hifumi * 33954eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 33964eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 33974eedeb75SHisashi Hifumi * many supers on this one device should be written. 33984eedeb75SHisashi Hifumi * 33994eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 34004eedeb75SHisashi Hifumi */ 3401a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 3402a512bbf8SYan Zheng struct btrfs_super_block *sb, 3403a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 3404a512bbf8SYan Zheng { 3405a512bbf8SYan Zheng struct buffer_head *bh; 3406a512bbf8SYan Zheng int i; 3407a512bbf8SYan Zheng int ret; 3408a512bbf8SYan Zheng int errors = 0; 3409a512bbf8SYan Zheng u32 crc; 3410a512bbf8SYan Zheng u64 bytenr; 3411a512bbf8SYan Zheng 3412a512bbf8SYan Zheng if (max_mirrors == 0) 3413a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 3414a512bbf8SYan Zheng 3415a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 3416a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 3417935e5cc9SMiao Xie if (bytenr + BTRFS_SUPER_INFO_SIZE >= 3418935e5cc9SMiao Xie device->commit_total_bytes) 3419a512bbf8SYan Zheng break; 3420a512bbf8SYan Zheng 3421a512bbf8SYan Zheng if (wait) { 3422a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 3423a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3424634554dcSJosef Bacik if (!bh) { 3425634554dcSJosef Bacik errors++; 3426634554dcSJosef Bacik continue; 3427634554dcSJosef Bacik } 3428a512bbf8SYan Zheng wait_on_buffer(bh); 34294eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 34304eedeb75SHisashi Hifumi errors++; 34314eedeb75SHisashi Hifumi 34324eedeb75SHisashi Hifumi /* drop our reference */ 34334eedeb75SHisashi Hifumi brelse(bh); 34344eedeb75SHisashi Hifumi 34354eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 3436a512bbf8SYan Zheng brelse(bh); 3437a512bbf8SYan Zheng continue; 3438a512bbf8SYan Zheng } else { 3439a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 3440a512bbf8SYan Zheng 3441a512bbf8SYan Zheng crc = ~(u32)0; 3442b0496686SLiu Bo crc = btrfs_csum_data((char *)sb + 3443a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 3444a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 3445a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 3446a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 3447a512bbf8SYan Zheng 34484eedeb75SHisashi Hifumi /* 34494eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 34504eedeb75SHisashi Hifumi * caller 34514eedeb75SHisashi Hifumi */ 3452a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 3453a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3454634554dcSJosef Bacik if (!bh) { 3455f14d104dSDavid Sterba btrfs_err(device->dev_root->fs_info, 3456f14d104dSDavid Sterba "couldn't get super buffer head for bytenr %llu", 3457f14d104dSDavid Sterba bytenr); 3458634554dcSJosef Bacik errors++; 3459634554dcSJosef Bacik continue; 3460634554dcSJosef Bacik } 3461634554dcSJosef Bacik 3462a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3463a512bbf8SYan Zheng 34644eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3465a512bbf8SYan Zheng get_bh(bh); 34664eedeb75SHisashi Hifumi 34674eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3468a512bbf8SYan Zheng lock_buffer(bh); 3469a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3470442a4f63SStefan Behrens bh->b_private = device; 3471a512bbf8SYan Zheng } 3472a512bbf8SYan Zheng 3473387125fcSChris Mason /* 3474387125fcSChris Mason * we fua the first super. The others we allow 3475387125fcSChris Mason * to go down lazy. 3476387125fcSChris Mason */ 3477e8117c26SWang Shilong if (i == 0) 34782a222ca9SMike Christie ret = btrfsic_submit_bh(REQ_OP_WRITE, WRITE_FUA, bh); 3479e8117c26SWang Shilong else 34802a222ca9SMike Christie ret = btrfsic_submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh); 34814eedeb75SHisashi Hifumi if (ret) 3482a512bbf8SYan Zheng errors++; 3483a512bbf8SYan Zheng } 3484a512bbf8SYan Zheng return errors < i ? 0 : -1; 3485a512bbf8SYan Zheng } 3486a512bbf8SYan Zheng 3487387125fcSChris Mason /* 3488387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3489387125fcSChris Mason * for the barrier when it is done 3490387125fcSChris Mason */ 34914246a0b6SChristoph Hellwig static void btrfs_end_empty_barrier(struct bio *bio) 3492387125fcSChris Mason { 3493387125fcSChris Mason if (bio->bi_private) 3494387125fcSChris Mason complete(bio->bi_private); 3495387125fcSChris Mason bio_put(bio); 3496387125fcSChris Mason } 3497387125fcSChris Mason 3498387125fcSChris Mason /* 3499387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 3500387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 3501387125fcSChris Mason * 3502387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 3503387125fcSChris Mason * capable 3504387125fcSChris Mason */ 3505387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 3506387125fcSChris Mason { 3507387125fcSChris Mason struct bio *bio; 3508387125fcSChris Mason int ret = 0; 3509387125fcSChris Mason 3510387125fcSChris Mason if (device->nobarriers) 3511387125fcSChris Mason return 0; 3512387125fcSChris Mason 3513387125fcSChris Mason if (wait) { 3514387125fcSChris Mason bio = device->flush_bio; 3515387125fcSChris Mason if (!bio) 3516387125fcSChris Mason return 0; 3517387125fcSChris Mason 3518387125fcSChris Mason wait_for_completion(&device->flush_wait); 3519387125fcSChris Mason 35204246a0b6SChristoph Hellwig if (bio->bi_error) { 35214246a0b6SChristoph Hellwig ret = bio->bi_error; 3522442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 3523442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 3524387125fcSChris Mason } 3525387125fcSChris Mason 3526387125fcSChris Mason /* drop the reference from the wait == 0 run */ 3527387125fcSChris Mason bio_put(bio); 3528387125fcSChris Mason device->flush_bio = NULL; 3529387125fcSChris Mason 3530387125fcSChris Mason return ret; 3531387125fcSChris Mason } 3532387125fcSChris Mason 3533387125fcSChris Mason /* 3534387125fcSChris Mason * one reference for us, and we leave it for the 3535387125fcSChris Mason * caller 3536387125fcSChris Mason */ 35379c017abcSJesper Juhl device->flush_bio = NULL; 35389be3395bSChris Mason bio = btrfs_io_bio_alloc(GFP_NOFS, 0); 3539387125fcSChris Mason if (!bio) 3540387125fcSChris Mason return -ENOMEM; 3541387125fcSChris Mason 3542387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3543387125fcSChris Mason bio->bi_bdev = device->bdev; 354437226b21SMike Christie bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_FLUSH); 3545387125fcSChris Mason init_completion(&device->flush_wait); 3546387125fcSChris Mason bio->bi_private = &device->flush_wait; 3547387125fcSChris Mason device->flush_bio = bio; 3548387125fcSChris Mason 3549387125fcSChris Mason bio_get(bio); 35504e49ea4aSMike Christie btrfsic_submit_bio(bio); 3551387125fcSChris Mason 3552387125fcSChris Mason return 0; 3553387125fcSChris Mason } 3554387125fcSChris Mason 3555387125fcSChris Mason /* 3556387125fcSChris Mason * send an empty flush down to each device in parallel, 3557387125fcSChris Mason * then wait for them 3558387125fcSChris Mason */ 3559387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3560387125fcSChris Mason { 3561387125fcSChris Mason struct list_head *head; 3562387125fcSChris Mason struct btrfs_device *dev; 35635af3e8ccSStefan Behrens int errors_send = 0; 35645af3e8ccSStefan Behrens int errors_wait = 0; 3565387125fcSChris Mason int ret; 3566387125fcSChris Mason 3567387125fcSChris Mason /* send down all the barriers */ 3568387125fcSChris Mason head = &info->fs_devices->devices; 3569387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3570f88ba6a2SHidetoshi Seto if (dev->missing) 3571f88ba6a2SHidetoshi Seto continue; 3572387125fcSChris Mason if (!dev->bdev) { 35735af3e8ccSStefan Behrens errors_send++; 3574387125fcSChris Mason continue; 3575387125fcSChris Mason } 3576387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3577387125fcSChris Mason continue; 3578387125fcSChris Mason 3579387125fcSChris Mason ret = write_dev_flush(dev, 0); 3580387125fcSChris Mason if (ret) 35815af3e8ccSStefan Behrens errors_send++; 3582387125fcSChris Mason } 3583387125fcSChris Mason 3584387125fcSChris Mason /* wait for all the barriers */ 3585387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3586f88ba6a2SHidetoshi Seto if (dev->missing) 3587f88ba6a2SHidetoshi Seto continue; 3588387125fcSChris Mason if (!dev->bdev) { 35895af3e8ccSStefan Behrens errors_wait++; 3590387125fcSChris Mason continue; 3591387125fcSChris Mason } 3592387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3593387125fcSChris Mason continue; 3594387125fcSChris Mason 3595387125fcSChris Mason ret = write_dev_flush(dev, 1); 3596387125fcSChris Mason if (ret) 35975af3e8ccSStefan Behrens errors_wait++; 3598387125fcSChris Mason } 35995af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 36005af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3601387125fcSChris Mason return -EIO; 3602387125fcSChris Mason return 0; 3603387125fcSChris Mason } 3604387125fcSChris Mason 3605943c6e99SZhao Lei int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) 3606943c6e99SZhao Lei { 36078789f4feSZhao Lei int raid_type; 36088789f4feSZhao Lei int min_tolerated = INT_MAX; 3609943c6e99SZhao Lei 36108789f4feSZhao Lei if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || 36118789f4feSZhao Lei (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) 36128789f4feSZhao Lei min_tolerated = min(min_tolerated, 36138789f4feSZhao Lei btrfs_raid_array[BTRFS_RAID_SINGLE]. 36148789f4feSZhao Lei tolerated_failures); 3615943c6e99SZhao Lei 36168789f4feSZhao Lei for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { 36178789f4feSZhao Lei if (raid_type == BTRFS_RAID_SINGLE) 36188789f4feSZhao Lei continue; 36198789f4feSZhao Lei if (!(flags & btrfs_raid_group[raid_type])) 36208789f4feSZhao Lei continue; 36218789f4feSZhao Lei min_tolerated = min(min_tolerated, 36228789f4feSZhao Lei btrfs_raid_array[raid_type]. 36238789f4feSZhao Lei tolerated_failures); 36248789f4feSZhao Lei } 3625943c6e99SZhao Lei 36268789f4feSZhao Lei if (min_tolerated == INT_MAX) { 36278789f4feSZhao Lei pr_warn("BTRFS: unknown raid flag: %llu\n", flags); 36288789f4feSZhao Lei min_tolerated = 0; 36298789f4feSZhao Lei } 36308789f4feSZhao Lei 36318789f4feSZhao Lei return min_tolerated; 3632943c6e99SZhao Lei } 3633943c6e99SZhao Lei 36345af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 36355af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 36365af3e8ccSStefan Behrens { 36375af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 36385af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 36395af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 36405af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 36415af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 36425af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 36435af3e8ccSStefan Behrens int i; 36445af3e8ccSStefan Behrens int c; 36455af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 36465af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 36475af3e8ccSStefan Behrens 36482c458045SZhao Lei for (i = 0; i < ARRAY_SIZE(types); i++) { 36495af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 36505af3e8ccSStefan Behrens 36515af3e8ccSStefan Behrens sinfo = NULL; 36525af3e8ccSStefan Behrens rcu_read_lock(); 36535af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 36545af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 36555af3e8ccSStefan Behrens sinfo = tmp; 36565af3e8ccSStefan Behrens break; 36575af3e8ccSStefan Behrens } 36585af3e8ccSStefan Behrens } 36595af3e8ccSStefan Behrens rcu_read_unlock(); 36605af3e8ccSStefan Behrens 36615af3e8ccSStefan Behrens if (!sinfo) 36625af3e8ccSStefan Behrens continue; 36635af3e8ccSStefan Behrens 36645af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 36655af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 36665af3e8ccSStefan Behrens u64 flags; 36675af3e8ccSStefan Behrens 36682c458045SZhao Lei if (list_empty(&sinfo->block_groups[c])) 36692c458045SZhao Lei continue; 36702c458045SZhao Lei 36712c458045SZhao Lei btrfs_get_block_group_info(&sinfo->block_groups[c], 36722c458045SZhao Lei &space); 36732c458045SZhao Lei if (space.total_bytes == 0 || space.used_bytes == 0) 36745af3e8ccSStefan Behrens continue; 36755af3e8ccSStefan Behrens flags = space.flags; 3676943c6e99SZhao Lei 3677943c6e99SZhao Lei num_tolerated_disk_barrier_failures = min( 3678943c6e99SZhao Lei num_tolerated_disk_barrier_failures, 3679943c6e99SZhao Lei btrfs_get_num_tolerated_disk_barrier_failures( 3680943c6e99SZhao Lei flags)); 36815af3e8ccSStefan Behrens } 36825af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 36835af3e8ccSStefan Behrens } 36845af3e8ccSStefan Behrens 36855af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 36865af3e8ccSStefan Behrens } 36875af3e8ccSStefan Behrens 368848a3b636SEric Sandeen static int write_all_supers(struct btrfs_root *root, int max_mirrors) 3689f2984462SChris Mason { 3690e5e9a520SChris Mason struct list_head *head; 3691f2984462SChris Mason struct btrfs_device *dev; 3692a061fc8dSChris Mason struct btrfs_super_block *sb; 3693f2984462SChris Mason struct btrfs_dev_item *dev_item; 3694f2984462SChris Mason int ret; 3695f2984462SChris Mason int do_barriers; 3696a236aed1SChris Mason int max_errors; 3697a236aed1SChris Mason int total_errors = 0; 3698a061fc8dSChris Mason u64 flags; 3699f2984462SChris Mason 37003cdde224SJeff Mahoney do_barriers = !btrfs_test_opt(root->fs_info, NOBARRIER); 3701af31f5e5SChris Mason backup_super_roots(root->fs_info); 3702f2984462SChris Mason 37036c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3704a061fc8dSChris Mason dev_item = &sb->dev_item; 3705e5e9a520SChris Mason 3706174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3707e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3708d7306801SFilipe David Borba Manana max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3709387125fcSChris Mason 37105af3e8ccSStefan Behrens if (do_barriers) { 37115af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 37125af3e8ccSStefan Behrens if (ret) { 37135af3e8ccSStefan Behrens mutex_unlock( 37145af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 371534d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, ret, 37165af3e8ccSStefan Behrens "errors while submitting device barriers."); 37175af3e8ccSStefan Behrens return ret; 37185af3e8ccSStefan Behrens } 37195af3e8ccSStefan Behrens } 3720387125fcSChris Mason 37211f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3722dfe25020SChris Mason if (!dev->bdev) { 3723dfe25020SChris Mason total_errors++; 3724dfe25020SChris Mason continue; 3725dfe25020SChris Mason } 37262b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3727dfe25020SChris Mason continue; 3728dfe25020SChris Mason 37292b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3730a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3731a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 37327df69d3eSMiao Xie btrfs_set_stack_device_total_bytes(dev_item, 3733935e5cc9SMiao Xie dev->commit_total_bytes); 3734ce7213c7SMiao Xie btrfs_set_stack_device_bytes_used(dev_item, 3735ce7213c7SMiao Xie dev->commit_bytes_used); 3736a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3737a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3738a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3739a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 37402b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3741a512bbf8SYan Zheng 3742a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3743a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3744f2984462SChris Mason 3745a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3746a236aed1SChris Mason if (ret) 3747a236aed1SChris Mason total_errors++; 3748f2984462SChris Mason } 3749a236aed1SChris Mason if (total_errors > max_errors) { 3750efe120a0SFrank Holton btrfs_err(root->fs_info, "%d errors while writing supers", 3751d397712bSChris Mason total_errors); 3752a724b436SStefan Behrens mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 375379787eaaSJeff Mahoney 37549d565ba4SStefan Behrens /* FUA is masked off if unsupported and can't be the reason */ 375534d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, -EIO, 37569d565ba4SStefan Behrens "%d errors while writing supers", total_errors); 37579d565ba4SStefan Behrens return -EIO; 3758a236aed1SChris Mason } 3759f2984462SChris Mason 3760a512bbf8SYan Zheng total_errors = 0; 37611f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3762dfe25020SChris Mason if (!dev->bdev) 3763dfe25020SChris Mason continue; 37642b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3765dfe25020SChris Mason continue; 3766dfe25020SChris Mason 3767a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3768a512bbf8SYan Zheng if (ret) 37691259ab75SChris Mason total_errors++; 3770f2984462SChris Mason } 3771174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3772a236aed1SChris Mason if (total_errors > max_errors) { 377334d97007SAnand Jain btrfs_handle_fs_error(root->fs_info, -EIO, 377479787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 377579787eaaSJeff Mahoney return -EIO; 3776a236aed1SChris Mason } 3777f2984462SChris Mason return 0; 3778f2984462SChris Mason } 3779f2984462SChris Mason 3780a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3781a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3782cfaa7295SChris Mason { 3783f570e757SRashika return write_all_supers(root, max_mirrors); 3784cfaa7295SChris Mason } 3785cfaa7295SChris Mason 3786cb517eabSMiao Xie /* Drop a fs root from the radix tree and free it. */ 3787cb517eabSMiao Xie void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, 3788cb517eabSMiao Xie struct btrfs_root *root) 37892619ba1fSChris Mason { 37904df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 37912619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 37922619ba1fSChris Mason (unsigned long)root->root_key.objectid); 37934df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 379476dda93cSYan, Zheng 379576dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 379676dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 379776dda93cSYan, Zheng 37981c1ea4f7SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 37993321719eSLiu Bo btrfs_free_log(NULL, root); 38001c1ea4f7SLiu Bo if (root->reloc_root) { 38011c1ea4f7SLiu Bo free_extent_buffer(root->reloc_root->node); 38021c1ea4f7SLiu Bo free_extent_buffer(root->reloc_root->commit_root); 38031c1ea4f7SLiu Bo btrfs_put_fs_root(root->reloc_root); 38041c1ea4f7SLiu Bo root->reloc_root = NULL; 38051c1ea4f7SLiu Bo } 38061c1ea4f7SLiu Bo } 38073321719eSLiu Bo 3808faa2dbf0SJosef Bacik if (root->free_ino_pinned) 3809581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3810faa2dbf0SJosef Bacik if (root->free_ino_ctl) 3811581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 38124df27c4dSYan, Zheng free_fs_root(root); 38134df27c4dSYan, Zheng } 38144df27c4dSYan, Zheng 38154df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 38164df27c4dSYan, Zheng { 381757cdc8dbSDavid Sterba iput(root->ino_cache_inode); 38184df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 38191cb048f5SFilipe David Borba Manana btrfs_free_block_rsv(root, root->orphan_block_rsv); 38201cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 38210ee5dc67SAl Viro if (root->anon_dev) 38220ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 38238257b2dcSMiao Xie if (root->subv_writers) 38248257b2dcSMiao Xie btrfs_free_subvolume_writers(root->subv_writers); 38255f39d397SChris Mason free_extent_buffer(root->node); 38265f39d397SChris Mason free_extent_buffer(root->commit_root); 3827581bb050SLi Zefan kfree(root->free_ino_ctl); 3828581bb050SLi Zefan kfree(root->free_ino_pinned); 382958176a96SJosef Bacik kfree(root->name); 3830b0feb9d9SMiao Xie btrfs_put_fs_root(root); 38312619ba1fSChris Mason } 38322619ba1fSChris Mason 3833cb517eabSMiao Xie void btrfs_free_fs_root(struct btrfs_root *root) 3834cb517eabSMiao Xie { 3835cb517eabSMiao Xie free_fs_root(root); 3836eb60ceacSChris Mason } 3837eb60ceacSChris Mason 3838c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3839c146afadSYan Zheng { 3840c146afadSYan Zheng u64 root_objectid = 0; 3841c146afadSYan Zheng struct btrfs_root *gang[8]; 384265d33fd7SQu Wenruo int i = 0; 384365d33fd7SQu Wenruo int err = 0; 384465d33fd7SQu Wenruo unsigned int ret = 0; 384565d33fd7SQu Wenruo int index; 3846c146afadSYan Zheng 3847c146afadSYan Zheng while (1) { 384865d33fd7SQu Wenruo index = srcu_read_lock(&fs_info->subvol_srcu); 3849c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3850c146afadSYan Zheng (void **)gang, root_objectid, 3851c146afadSYan Zheng ARRAY_SIZE(gang)); 385265d33fd7SQu Wenruo if (!ret) { 385365d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 3854c146afadSYan Zheng break; 385565d33fd7SQu Wenruo } 38565d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 385766b4ffd1SJosef Bacik 385865d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 385965d33fd7SQu Wenruo /* Avoid to grab roots in dead_roots */ 386065d33fd7SQu Wenruo if (btrfs_root_refs(&gang[i]->root_item) == 0) { 386165d33fd7SQu Wenruo gang[i] = NULL; 386265d33fd7SQu Wenruo continue; 386365d33fd7SQu Wenruo } 386465d33fd7SQu Wenruo /* grab all the search result for later use */ 386565d33fd7SQu Wenruo gang[i] = btrfs_grab_fs_root(gang[i]); 386665d33fd7SQu Wenruo } 386765d33fd7SQu Wenruo srcu_read_unlock(&fs_info->subvol_srcu, index); 386865d33fd7SQu Wenruo 386965d33fd7SQu Wenruo for (i = 0; i < ret; i++) { 387065d33fd7SQu Wenruo if (!gang[i]) 387165d33fd7SQu Wenruo continue; 3872c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 387366b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 387466b4ffd1SJosef Bacik if (err) 387565d33fd7SQu Wenruo break; 387665d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 3877c146afadSYan Zheng } 3878c146afadSYan Zheng root_objectid++; 3879c146afadSYan Zheng } 388065d33fd7SQu Wenruo 388165d33fd7SQu Wenruo /* release the uncleaned roots due to error */ 388265d33fd7SQu Wenruo for (; i < ret; i++) { 388365d33fd7SQu Wenruo if (gang[i]) 388465d33fd7SQu Wenruo btrfs_put_fs_root(gang[i]); 388565d33fd7SQu Wenruo } 388665d33fd7SQu Wenruo return err; 3887c146afadSYan Zheng } 3888c146afadSYan Zheng 3889c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3890c146afadSYan Zheng { 3891c146afadSYan Zheng struct btrfs_trans_handle *trans; 3892c146afadSYan Zheng 3893c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 389424bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3895c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 38969d1a2a3aSDavid Sterba wake_up_process(root->fs_info->cleaner_kthread); 3897c71bf099SYan, Zheng 3898c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3899c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3900c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3901c71bf099SYan, Zheng 39027a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 39033612b495STsutomu Itoh if (IS_ERR(trans)) 39043612b495STsutomu Itoh return PTR_ERR(trans); 3905d52c1bccSLiu Bo return btrfs_commit_transaction(trans, root); 3906c146afadSYan Zheng } 3907c146afadSYan Zheng 39083abdbd78SDavid Sterba void close_ctree(struct btrfs_root *root) 3909eb60ceacSChris Mason { 39100f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3911c146afadSYan Zheng int ret; 3912e089f05cSChris Mason 3913afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); 3914a2135011SChris Mason 39157343dd61SJustin Maggard /* wait for the qgroup rescan worker to stop */ 3916d06f23d6SJeff Mahoney btrfs_qgroup_wait_for_completion(fs_info, false); 39177343dd61SJustin Maggard 3918803b2f54SStefan Behrens /* wait for the uuid_scan task to finish */ 3919803b2f54SStefan Behrens down(&fs_info->uuid_tree_rescan_sem); 3920803b2f54SStefan Behrens /* avoid complains from lockdep et al., set sem back to initial state */ 3921803b2f54SStefan Behrens up(&fs_info->uuid_tree_rescan_sem); 3922803b2f54SStefan Behrens 3923837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3924aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3925837d5b6eSIlya Dryomov 39268dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 39278dabb742SStefan Behrens 3928aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 39294cb5300bSChris Mason 39304cb5300bSChris Mason /* wait for any defraggers to finish */ 39314cb5300bSChris Mason wait_event(fs_info->transaction_wait, 39324cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 39334cb5300bSChris Mason 39344cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 393526176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 39364cb5300bSChris Mason 393721c7e756SMiao Xie cancel_work_sync(&fs_info->async_reclaim_work); 393821c7e756SMiao Xie 3939c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3940e44163e1SJeff Mahoney /* 3941e44163e1SJeff Mahoney * If the cleaner thread is stopped and there are 3942e44163e1SJeff Mahoney * block groups queued for removal, the deletion will be 3943e44163e1SJeff Mahoney * skipped when we quit the cleaner thread. 3944e44163e1SJeff Mahoney */ 3945e44163e1SJeff Mahoney btrfs_delete_unused_bgs(root->fs_info); 3946e44163e1SJeff Mahoney 3947c146afadSYan Zheng ret = btrfs_commit_super(root); 3948d397712bSChris Mason if (ret) 394904892340SEric Sandeen btrfs_err(fs_info, "commit super ret %d", ret); 3950c146afadSYan Zheng } 3951ed2ff2cbSChris Mason 395287533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 395368ce9682SStefan Behrens btrfs_error_commit_super(root); 3954acce952bSliubo 3955e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3956e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 39578929ecfaSYan, Zheng 3958afcdd129SJosef Bacik set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); 3959f25784b3SYan Zheng 396004892340SEric Sandeen btrfs_free_qgroup_config(fs_info); 3961bcef60f2SArne Jansen 3962963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 396304892340SEric Sandeen btrfs_info(fs_info, "at unmount delalloc count %lld", 3964963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3965b0c68f8bSChris Mason } 396631153d81SYan Zheng 39676618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 3968b7c35e81SAnand Jain btrfs_sysfs_remove_fsid(fs_info->fs_devices); 39695ac1d209SJeff Mahoney 3970faa2dbf0SJosef Bacik btrfs_free_fs_roots(fs_info); 3971d10c5f31SChris Mason 39721a4319ccSLiu Bo btrfs_put_block_group_cache(fs_info); 39731a4319ccSLiu Bo 39742b1360daSJosef Bacik btrfs_free_block_groups(fs_info); 39752b1360daSJosef Bacik 3976de348ee0SWang Shilong /* 3977de348ee0SWang Shilong * we must make sure there is not any read request to 3978de348ee0SWang Shilong * submit after we stopping all workers. 3979de348ee0SWang Shilong */ 3980de348ee0SWang Shilong invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 398196192499SJosef Bacik btrfs_stop_all_workers(fs_info); 398296192499SJosef Bacik 3983afcdd129SJosef Bacik clear_bit(BTRFS_FS_OPEN, &fs_info->flags); 398413e6c37bSJosef Bacik free_root_pointers(fs_info, 1); 39859ad6b7bcSChris Mason 398613e6c37bSJosef Bacik iput(fs_info->btree_inode); 3987d6bfde87SChris Mason 398821adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 39893cdde224SJeff Mahoney if (btrfs_test_opt(root->fs_info, CHECK_INTEGRITY)) 399021adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 399121adbd5cSStefan Behrens #endif 399221adbd5cSStefan Behrens 3993dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 39940b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3995b248a415SChris Mason 3996e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3997963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 3998c404e0dcSMiao Xie percpu_counter_destroy(&fs_info->bio_counter); 399904160088SChris Mason bdi_destroy(&fs_info->bdi); 400076dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 40010b86a832SChris Mason 400253b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 400353b381b3SDavid Woodhouse 4004cdfb080eSChris Mason __btrfs_free_block_rsv(root->orphan_block_rsv); 40051cb048f5SFilipe David Borba Manana root->orphan_block_rsv = NULL; 400604216820SFilipe Manana 400704216820SFilipe Manana lock_chunks(root); 400804216820SFilipe Manana while (!list_empty(&fs_info->pinned_chunks)) { 400904216820SFilipe Manana struct extent_map *em; 401004216820SFilipe Manana 401104216820SFilipe Manana em = list_first_entry(&fs_info->pinned_chunks, 401204216820SFilipe Manana struct extent_map, list); 401304216820SFilipe Manana list_del_init(&em->list); 401404216820SFilipe Manana free_extent_map(em); 401504216820SFilipe Manana } 401604216820SFilipe Manana unlock_chunks(root); 4017eb60ceacSChris Mason } 4018eb60ceacSChris Mason 4019b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 4020b9fab919SChris Mason int atomic) 4021ccd467d6SChris Mason { 40221259ab75SChris Mason int ret; 4023727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 40241259ab75SChris Mason 40250b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 40261259ab75SChris Mason if (!ret) 40271259ab75SChris Mason return ret; 40281259ab75SChris Mason 40291259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 4030b9fab919SChris Mason parent_transid, atomic); 4031b9fab919SChris Mason if (ret == -EAGAIN) 4032b9fab919SChris Mason return ret; 40331259ab75SChris Mason return !ret; 40345f39d397SChris Mason } 40356702ed49SChris Mason 40365f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 40375f39d397SChris Mason { 403806ea65a3SJosef Bacik struct btrfs_root *root; 40395f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 4040b9473439SChris Mason int was_dirty; 4041b4ce94deSChris Mason 404206ea65a3SJosef Bacik #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 404306ea65a3SJosef Bacik /* 404406ea65a3SJosef Bacik * This is a fast path so only do this check if we have sanity tests 404506ea65a3SJosef Bacik * enabled. Normal people shouldn't be marking dummy buffers as dirty 404606ea65a3SJosef Bacik * outside of the sanity tests. 404706ea65a3SJosef Bacik */ 404806ea65a3SJosef Bacik if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) 404906ea65a3SJosef Bacik return; 405006ea65a3SJosef Bacik #endif 405106ea65a3SJosef Bacik root = BTRFS_I(buf->pages[0]->mapping->host)->root; 4052b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 405331b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 40545d163e0eSJeff Mahoney WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", 4055c1c9ff7cSGeert Uytterhoeven buf->start, transid, root->fs_info->generation); 40560b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 4057e2d84521SMiao Xie if (!was_dirty) 4058e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 4059e2d84521SMiao Xie buf->len, 4060e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 40611f21ef0aSFilipe Manana #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 40621f21ef0aSFilipe Manana if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { 40631f21ef0aSFilipe Manana btrfs_print_leaf(root, buf); 40641f21ef0aSFilipe Manana ASSERT(0); 40651f21ef0aSFilipe Manana } 40661f21ef0aSFilipe Manana #endif 4067eb60ceacSChris Mason } 4068eb60ceacSChris Mason 4069b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 4070b53d3f5dSLiu Bo int flush_delayed) 407135b7e476SChris Mason { 4072188de649SChris Mason /* 4073188de649SChris Mason * looks as though older kernels can get into trouble with 4074188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 4075188de649SChris Mason */ 4076e2d84521SMiao Xie int ret; 4077d6bfde87SChris Mason 40786933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 4079d6bfde87SChris Mason return; 4080d6bfde87SChris Mason 4081b53d3f5dSLiu Bo if (flush_delayed) 408216cdcec7SMiao Xie btrfs_balance_delayed_items(root); 408316cdcec7SMiao Xie 4084e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 4085e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 4086e2d84521SMiao Xie if (ret > 0) { 4087d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 4088d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 408916cdcec7SMiao Xie } 409016cdcec7SMiao Xie } 409116cdcec7SMiao Xie 4092b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 409316cdcec7SMiao Xie { 4094b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 409535b7e476SChris Mason } 4096b53d3f5dSLiu Bo 4097b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 4098b53d3f5dSLiu Bo { 4099b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 4100d6bfde87SChris Mason } 41016b80053dSChris Mason 4102ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 41036b80053dSChris Mason { 4104727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 41058436ea91SJosef Bacik return btree_read_extent_buffer_pages(root, buf, parent_transid); 41066b80053dSChris Mason } 41070da5468fSChris Mason 4108fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 4109acce952bSliubo int read_only) 4110acce952bSliubo { 4111c926093eSDavid Sterba struct btrfs_super_block *sb = fs_info->super_copy; 4112319e4d06SQu Wenruo u64 nodesize = btrfs_super_nodesize(sb); 4113319e4d06SQu Wenruo u64 sectorsize = btrfs_super_sectorsize(sb); 4114c926093eSDavid Sterba int ret = 0; 4115c926093eSDavid Sterba 4116319e4d06SQu Wenruo if (btrfs_super_magic(sb) != BTRFS_MAGIC) { 4117319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: no valid FS found\n"); 4118319e4d06SQu Wenruo ret = -EINVAL; 4119319e4d06SQu Wenruo } 4120319e4d06SQu Wenruo if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) 4121319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: unrecognized super flag: %llu\n", 4122319e4d06SQu Wenruo btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); 412321e7626bSDavid Sterba if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { 412421e7626bSDavid Sterba printk(KERN_ERR "BTRFS: tree_root level too big: %d >= %d\n", 412521e7626bSDavid Sterba btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); 4126c926093eSDavid Sterba ret = -EINVAL; 4127c926093eSDavid Sterba } 412821e7626bSDavid Sterba if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { 412921e7626bSDavid Sterba printk(KERN_ERR "BTRFS: chunk_root level too big: %d >= %d\n", 413021e7626bSDavid Sterba btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); 4131c926093eSDavid Sterba ret = -EINVAL; 4132c926093eSDavid Sterba } 413321e7626bSDavid Sterba if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { 413421e7626bSDavid Sterba printk(KERN_ERR "BTRFS: log_root level too big: %d >= %d\n", 413521e7626bSDavid Sterba btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); 4136c926093eSDavid Sterba ret = -EINVAL; 4137c926093eSDavid Sterba } 4138c926093eSDavid Sterba 41391104a885SDavid Sterba /* 4140319e4d06SQu Wenruo * Check sectorsize and nodesize first, other check will need it. 4141319e4d06SQu Wenruo * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. 41421104a885SDavid Sterba */ 4143319e4d06SQu Wenruo if (!is_power_of_2(sectorsize) || sectorsize < 4096 || 4144319e4d06SQu Wenruo sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { 4145319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize); 414675d6ad38SDavid Sterba ret = -EINVAL; 414775d6ad38SDavid Sterba } 4148319e4d06SQu Wenruo /* Only PAGE SIZE is supported yet */ 414909cbfeafSKirill A. Shutemov if (sectorsize != PAGE_SIZE) { 4150319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n", 415109cbfeafSKirill A. Shutemov sectorsize, PAGE_SIZE); 4152319e4d06SQu Wenruo ret = -EINVAL; 4153319e4d06SQu Wenruo } 4154319e4d06SQu Wenruo if (!is_power_of_2(nodesize) || nodesize < sectorsize || 4155319e4d06SQu Wenruo nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { 4156319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize); 4157319e4d06SQu Wenruo ret = -EINVAL; 4158319e4d06SQu Wenruo } 4159319e4d06SQu Wenruo if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { 4160319e4d06SQu Wenruo printk(KERN_ERR "BTRFS: invalid leafsize %u, should be %llu\n", 4161319e4d06SQu Wenruo le32_to_cpu(sb->__unused_leafsize), 4162319e4d06SQu Wenruo nodesize); 4163319e4d06SQu Wenruo ret = -EINVAL; 4164319e4d06SQu Wenruo } 4165319e4d06SQu Wenruo 4166319e4d06SQu Wenruo /* Root alignment check */ 4167319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { 4168319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: tree_root block unaligned: %llu\n", 4169319e4d06SQu Wenruo btrfs_super_root(sb)); 4170319e4d06SQu Wenruo ret = -EINVAL; 4171319e4d06SQu Wenruo } 4172319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { 4173319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: chunk_root block unaligned: %llu\n", 4174319e4d06SQu Wenruo btrfs_super_chunk_root(sb)); 4175319e4d06SQu Wenruo ret = -EINVAL; 4176319e4d06SQu Wenruo } 4177319e4d06SQu Wenruo if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { 4178319e4d06SQu Wenruo printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n", 4179319e4d06SQu Wenruo btrfs_super_log_root(sb)); 418075d6ad38SDavid Sterba ret = -EINVAL; 418175d6ad38SDavid Sterba } 418275d6ad38SDavid Sterba 4183c926093eSDavid Sterba if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { 4184c926093eSDavid Sterba printk(KERN_ERR "BTRFS: dev_item UUID does not match fsid: %pU != %pU\n", 4185c926093eSDavid Sterba fs_info->fsid, sb->dev_item.fsid); 4186c926093eSDavid Sterba ret = -EINVAL; 4187c926093eSDavid Sterba } 4188c926093eSDavid Sterba 4189c926093eSDavid Sterba /* 4190c926093eSDavid Sterba * Hint to catch really bogus numbers, bitflips or so, more exact checks are 4191c926093eSDavid Sterba * done later 4192c926093eSDavid Sterba */ 419399e3ecfcSLiu Bo if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { 419499e3ecfcSLiu Bo btrfs_err(fs_info, "bytes_used is too small %llu", 419599e3ecfcSLiu Bo btrfs_super_bytes_used(sb)); 419699e3ecfcSLiu Bo ret = -EINVAL; 419799e3ecfcSLiu Bo } 4198b7f67055SChandan Rajendra if (!is_power_of_2(btrfs_super_stripesize(sb))) { 419999e3ecfcSLiu Bo btrfs_err(fs_info, "invalid stripesize %u", 420099e3ecfcSLiu Bo btrfs_super_stripesize(sb)); 420199e3ecfcSLiu Bo ret = -EINVAL; 420299e3ecfcSLiu Bo } 420321e7626bSDavid Sterba if (btrfs_super_num_devices(sb) > (1UL << 31)) 4204c926093eSDavid Sterba printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n", 420521e7626bSDavid Sterba btrfs_super_num_devices(sb)); 420675d6ad38SDavid Sterba if (btrfs_super_num_devices(sb) == 0) { 420775d6ad38SDavid Sterba printk(KERN_ERR "BTRFS: number of devices is 0\n"); 420875d6ad38SDavid Sterba ret = -EINVAL; 420975d6ad38SDavid Sterba } 4210c926093eSDavid Sterba 421121e7626bSDavid Sterba if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) { 4212c926093eSDavid Sterba printk(KERN_ERR "BTRFS: super offset mismatch %llu != %u\n", 421321e7626bSDavid Sterba btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); 4214c926093eSDavid Sterba ret = -EINVAL; 4215c926093eSDavid Sterba } 4216c926093eSDavid Sterba 4217c926093eSDavid Sterba /* 4218ce7fca5fSDavid Sterba * Obvious sys_chunk_array corruptions, it must hold at least one key 4219ce7fca5fSDavid Sterba * and one chunk 4220ce7fca5fSDavid Sterba */ 4221ce7fca5fSDavid Sterba if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { 4222ce7fca5fSDavid Sterba printk(KERN_ERR "BTRFS: system chunk array too big %u > %u\n", 4223ce7fca5fSDavid Sterba btrfs_super_sys_array_size(sb), 4224ce7fca5fSDavid Sterba BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); 4225ce7fca5fSDavid Sterba ret = -EINVAL; 4226ce7fca5fSDavid Sterba } 4227ce7fca5fSDavid Sterba if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) 4228ce7fca5fSDavid Sterba + sizeof(struct btrfs_chunk)) { 4229d2207129SFabian Frederick printk(KERN_ERR "BTRFS: system chunk array too small %u < %zu\n", 4230ce7fca5fSDavid Sterba btrfs_super_sys_array_size(sb), 4231ce7fca5fSDavid Sterba sizeof(struct btrfs_disk_key) 4232ce7fca5fSDavid Sterba + sizeof(struct btrfs_chunk)); 4233ce7fca5fSDavid Sterba ret = -EINVAL; 4234ce7fca5fSDavid Sterba } 4235ce7fca5fSDavid Sterba 4236ce7fca5fSDavid Sterba /* 4237c926093eSDavid Sterba * The generation is a global counter, we'll trust it more than the others 4238c926093eSDavid Sterba * but it's still possible that it's the one that's wrong. 4239c926093eSDavid Sterba */ 424021e7626bSDavid Sterba if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) 4241c926093eSDavid Sterba printk(KERN_WARNING 4242c926093eSDavid Sterba "BTRFS: suspicious: generation < chunk_root_generation: %llu < %llu\n", 424321e7626bSDavid Sterba btrfs_super_generation(sb), btrfs_super_chunk_root_generation(sb)); 424421e7626bSDavid Sterba if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) 424521e7626bSDavid Sterba && btrfs_super_cache_generation(sb) != (u64)-1) 4246c926093eSDavid Sterba printk(KERN_WARNING 4247c926093eSDavid Sterba "BTRFS: suspicious: generation < cache_generation: %llu < %llu\n", 424821e7626bSDavid Sterba btrfs_super_generation(sb), btrfs_super_cache_generation(sb)); 4249c926093eSDavid Sterba 4250c926093eSDavid Sterba return ret; 4251fcd1f065SDavid Sterba } 4252fcd1f065SDavid Sterba 425348a3b636SEric Sandeen static void btrfs_error_commit_super(struct btrfs_root *root) 4254acce952bSliubo { 4255acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 4256acce952bSliubo btrfs_run_delayed_iputs(root); 4257acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 4258acce952bSliubo 4259acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 4260acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 4261acce952bSliubo 4262acce952bSliubo /* cleanup FS via transaction */ 4263acce952bSliubo btrfs_cleanup_transaction(root); 4264acce952bSliubo } 4265acce952bSliubo 4266143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 4267acce952bSliubo { 4268acce952bSliubo struct btrfs_ordered_extent *ordered; 4269acce952bSliubo 4270199c2a9cSMiao Xie spin_lock(&root->ordered_extent_lock); 4271779880efSJosef Bacik /* 4272779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 4273779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 4274779880efSJosef Bacik */ 4275199c2a9cSMiao Xie list_for_each_entry(ordered, &root->ordered_extents, 4276779880efSJosef Bacik root_extent_list) 4277779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 4278199c2a9cSMiao Xie spin_unlock(&root->ordered_extent_lock); 4279199c2a9cSMiao Xie } 4280199c2a9cSMiao Xie 4281199c2a9cSMiao Xie static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) 4282199c2a9cSMiao Xie { 4283199c2a9cSMiao Xie struct btrfs_root *root; 4284199c2a9cSMiao Xie struct list_head splice; 4285199c2a9cSMiao Xie 4286199c2a9cSMiao Xie INIT_LIST_HEAD(&splice); 4287199c2a9cSMiao Xie 4288199c2a9cSMiao Xie spin_lock(&fs_info->ordered_root_lock); 4289199c2a9cSMiao Xie list_splice_init(&fs_info->ordered_roots, &splice); 4290199c2a9cSMiao Xie while (!list_empty(&splice)) { 4291199c2a9cSMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4292199c2a9cSMiao Xie ordered_root); 42931de2cfdeSJosef Bacik list_move_tail(&root->ordered_root, 42941de2cfdeSJosef Bacik &fs_info->ordered_roots); 4295199c2a9cSMiao Xie 42962a85d9caSLiu Bo spin_unlock(&fs_info->ordered_root_lock); 4297199c2a9cSMiao Xie btrfs_destroy_ordered_extents(root); 4298199c2a9cSMiao Xie 42992a85d9caSLiu Bo cond_resched(); 43002a85d9caSLiu Bo spin_lock(&fs_info->ordered_root_lock); 4301199c2a9cSMiao Xie } 4302199c2a9cSMiao Xie spin_unlock(&fs_info->ordered_root_lock); 4303acce952bSliubo } 4304acce952bSliubo 430535a3621bSStefan Behrens static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 4306acce952bSliubo struct btrfs_root *root) 4307acce952bSliubo { 4308acce952bSliubo struct rb_node *node; 4309acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 4310acce952bSliubo struct btrfs_delayed_ref_node *ref; 4311acce952bSliubo int ret = 0; 4312acce952bSliubo 4313acce952bSliubo delayed_refs = &trans->delayed_refs; 4314acce952bSliubo 4315acce952bSliubo spin_lock(&delayed_refs->lock); 4316d7df2c79SJosef Bacik if (atomic_read(&delayed_refs->num_entries) == 0) { 4317cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 4318efe120a0SFrank Holton btrfs_info(root->fs_info, "delayed_refs has NO entry"); 4319acce952bSliubo return ret; 4320acce952bSliubo } 4321acce952bSliubo 4322d7df2c79SJosef Bacik while ((node = rb_first(&delayed_refs->href_root)) != NULL) { 4323d7df2c79SJosef Bacik struct btrfs_delayed_ref_head *head; 4324c6fc2454SQu Wenruo struct btrfs_delayed_ref_node *tmp; 4325e78417d1SJosef Bacik bool pin_bytes = false; 4326acce952bSliubo 4327d7df2c79SJosef Bacik head = rb_entry(node, struct btrfs_delayed_ref_head, 4328d7df2c79SJosef Bacik href_node); 4329b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 4330d7df2c79SJosef Bacik atomic_inc(&head->node.refs); 433179787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 4332b939d1abSJosef Bacik 4333acce952bSliubo mutex_lock(&head->mutex); 4334b939d1abSJosef Bacik mutex_unlock(&head->mutex); 4335d7df2c79SJosef Bacik btrfs_put_delayed_ref(&head->node); 4336e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 4337b939d1abSJosef Bacik continue; 4338b939d1abSJosef Bacik } 4339d7df2c79SJosef Bacik spin_lock(&head->lock); 4340c6fc2454SQu Wenruo list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list, 4341c6fc2454SQu Wenruo list) { 4342d7df2c79SJosef Bacik ref->in_tree = 0; 4343c6fc2454SQu Wenruo list_del(&ref->list); 4344d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4345d7df2c79SJosef Bacik btrfs_put_delayed_ref(ref); 4346d7df2c79SJosef Bacik } 434754067ae9SJosef Bacik if (head->must_insert_reserved) 4348e78417d1SJosef Bacik pin_bytes = true; 434978a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 4350acce952bSliubo delayed_refs->num_heads--; 4351d7df2c79SJosef Bacik if (head->processing == 0) 4352acce952bSliubo delayed_refs->num_heads_ready--; 4353d7df2c79SJosef Bacik atomic_dec(&delayed_refs->num_entries); 4354d7df2c79SJosef Bacik head->node.in_tree = 0; 4355c46effa6SLiu Bo rb_erase(&head->href_node, &delayed_refs->href_root); 4356d7df2c79SJosef Bacik spin_unlock(&head->lock); 4357acce952bSliubo spin_unlock(&delayed_refs->lock); 4358e78417d1SJosef Bacik mutex_unlock(&head->mutex); 4359acce952bSliubo 4360d7df2c79SJosef Bacik if (pin_bytes) 4361d7df2c79SJosef Bacik btrfs_pin_extent(root, head->node.bytenr, 4362d7df2c79SJosef Bacik head->node.num_bytes, 1); 4363d7df2c79SJosef Bacik btrfs_put_delayed_ref(&head->node); 4364acce952bSliubo cond_resched(); 4365acce952bSliubo spin_lock(&delayed_refs->lock); 4366acce952bSliubo } 4367acce952bSliubo 4368acce952bSliubo spin_unlock(&delayed_refs->lock); 4369acce952bSliubo 4370acce952bSliubo return ret; 4371acce952bSliubo } 4372acce952bSliubo 4373143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 4374acce952bSliubo { 4375acce952bSliubo struct btrfs_inode *btrfs_inode; 4376acce952bSliubo struct list_head splice; 4377acce952bSliubo 4378acce952bSliubo INIT_LIST_HEAD(&splice); 4379acce952bSliubo 4380eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4381eb73c1b7SMiao Xie list_splice_init(&root->delalloc_inodes, &splice); 4382acce952bSliubo 4383acce952bSliubo while (!list_empty(&splice)) { 4384eb73c1b7SMiao Xie btrfs_inode = list_first_entry(&splice, struct btrfs_inode, 4385acce952bSliubo delalloc_inodes); 4386acce952bSliubo 4387acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 4388df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 4389df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 4390eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4391acce952bSliubo 4392acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 4393b216cbfbSMiao Xie 4394eb73c1b7SMiao Xie spin_lock(&root->delalloc_lock); 4395acce952bSliubo } 4396acce952bSliubo 4397eb73c1b7SMiao Xie spin_unlock(&root->delalloc_lock); 4398eb73c1b7SMiao Xie } 4399eb73c1b7SMiao Xie 4400eb73c1b7SMiao Xie static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) 4401eb73c1b7SMiao Xie { 4402eb73c1b7SMiao Xie struct btrfs_root *root; 4403eb73c1b7SMiao Xie struct list_head splice; 4404eb73c1b7SMiao Xie 4405eb73c1b7SMiao Xie INIT_LIST_HEAD(&splice); 4406eb73c1b7SMiao Xie 4407eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4408eb73c1b7SMiao Xie list_splice_init(&fs_info->delalloc_roots, &splice); 4409eb73c1b7SMiao Xie while (!list_empty(&splice)) { 4410eb73c1b7SMiao Xie root = list_first_entry(&splice, struct btrfs_root, 4411eb73c1b7SMiao Xie delalloc_root); 4412eb73c1b7SMiao Xie list_del_init(&root->delalloc_root); 4413eb73c1b7SMiao Xie root = btrfs_grab_fs_root(root); 4414eb73c1b7SMiao Xie BUG_ON(!root); 4415eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4416eb73c1b7SMiao Xie 4417eb73c1b7SMiao Xie btrfs_destroy_delalloc_inodes(root); 4418eb73c1b7SMiao Xie btrfs_put_fs_root(root); 4419eb73c1b7SMiao Xie 4420eb73c1b7SMiao Xie spin_lock(&fs_info->delalloc_root_lock); 4421eb73c1b7SMiao Xie } 4422eb73c1b7SMiao Xie spin_unlock(&fs_info->delalloc_root_lock); 4423acce952bSliubo } 4424acce952bSliubo 4425acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 4426acce952bSliubo struct extent_io_tree *dirty_pages, 4427acce952bSliubo int mark) 4428acce952bSliubo { 4429acce952bSliubo int ret; 4430acce952bSliubo struct extent_buffer *eb; 4431acce952bSliubo u64 start = 0; 4432acce952bSliubo u64 end; 4433acce952bSliubo 4434acce952bSliubo while (1) { 4435acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 4436e6138876SJosef Bacik mark, NULL); 4437acce952bSliubo if (ret) 4438acce952bSliubo break; 4439acce952bSliubo 444091166212SDavid Sterba clear_extent_bits(dirty_pages, start, end, mark); 4441acce952bSliubo while (start <= end) { 444201d58472SDaniel Dressler eb = btrfs_find_tree_block(root->fs_info, start); 4443707e8a07SDavid Sterba start += root->nodesize; 4444fd8b2b61SJosef Bacik if (!eb) 4445acce952bSliubo continue; 4446fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 4447acce952bSliubo 4448fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 4449fd8b2b61SJosef Bacik &eb->bflags)) 4450fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 4451fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 4452acce952bSliubo } 4453acce952bSliubo } 4454acce952bSliubo 4455acce952bSliubo return ret; 4456acce952bSliubo } 4457acce952bSliubo 4458acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 4459acce952bSliubo struct extent_io_tree *pinned_extents) 4460acce952bSliubo { 4461acce952bSliubo struct extent_io_tree *unpin; 4462acce952bSliubo u64 start; 4463acce952bSliubo u64 end; 4464acce952bSliubo int ret; 4465ed0eaa14SLiu Bo bool loop = true; 4466acce952bSliubo 4467acce952bSliubo unpin = pinned_extents; 4468ed0eaa14SLiu Bo again: 4469acce952bSliubo while (1) { 4470acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 4471e6138876SJosef Bacik EXTENT_DIRTY, NULL); 4472acce952bSliubo if (ret) 4473acce952bSliubo break; 4474acce952bSliubo 4475af6f8f60SDavid Sterba clear_extent_dirty(unpin, start, end); 4476acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 4477acce952bSliubo cond_resched(); 4478acce952bSliubo } 4479acce952bSliubo 4480ed0eaa14SLiu Bo if (loop) { 4481ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 4482ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 4483ed0eaa14SLiu Bo else 4484ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 4485ed0eaa14SLiu Bo loop = false; 4486ed0eaa14SLiu Bo goto again; 4487ed0eaa14SLiu Bo } 4488ed0eaa14SLiu Bo 4489acce952bSliubo return 0; 4490acce952bSliubo } 4491acce952bSliubo 4492c79a1751SLiu Bo static void btrfs_cleanup_bg_io(struct btrfs_block_group_cache *cache) 4493c79a1751SLiu Bo { 4494c79a1751SLiu Bo struct inode *inode; 4495c79a1751SLiu Bo 4496c79a1751SLiu Bo inode = cache->io_ctl.inode; 4497c79a1751SLiu Bo if (inode) { 4498c79a1751SLiu Bo invalidate_inode_pages2(inode->i_mapping); 4499c79a1751SLiu Bo BTRFS_I(inode)->generation = 0; 4500c79a1751SLiu Bo cache->io_ctl.inode = NULL; 4501c79a1751SLiu Bo iput(inode); 4502c79a1751SLiu Bo } 4503c79a1751SLiu Bo btrfs_put_block_group(cache); 4504c79a1751SLiu Bo } 4505c79a1751SLiu Bo 4506c79a1751SLiu Bo void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, 4507c79a1751SLiu Bo struct btrfs_root *root) 4508c79a1751SLiu Bo { 4509c79a1751SLiu Bo struct btrfs_block_group_cache *cache; 4510c79a1751SLiu Bo 4511c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4512c79a1751SLiu Bo while (!list_empty(&cur_trans->dirty_bgs)) { 4513c79a1751SLiu Bo cache = list_first_entry(&cur_trans->dirty_bgs, 4514c79a1751SLiu Bo struct btrfs_block_group_cache, 4515c79a1751SLiu Bo dirty_list); 4516c79a1751SLiu Bo if (!cache) { 4517c79a1751SLiu Bo btrfs_err(root->fs_info, 4518c79a1751SLiu Bo "orphan block group dirty_bgs list"); 4519c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4520c79a1751SLiu Bo return; 4521c79a1751SLiu Bo } 4522c79a1751SLiu Bo 4523c79a1751SLiu Bo if (!list_empty(&cache->io_list)) { 4524c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4525c79a1751SLiu Bo list_del_init(&cache->io_list); 4526c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4527c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4528c79a1751SLiu Bo } 4529c79a1751SLiu Bo 4530c79a1751SLiu Bo list_del_init(&cache->dirty_list); 4531c79a1751SLiu Bo spin_lock(&cache->lock); 4532c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4533c79a1751SLiu Bo spin_unlock(&cache->lock); 4534c79a1751SLiu Bo 4535c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4536c79a1751SLiu Bo btrfs_put_block_group(cache); 4537c79a1751SLiu Bo spin_lock(&cur_trans->dirty_bgs_lock); 4538c79a1751SLiu Bo } 4539c79a1751SLiu Bo spin_unlock(&cur_trans->dirty_bgs_lock); 4540c79a1751SLiu Bo 4541c79a1751SLiu Bo while (!list_empty(&cur_trans->io_bgs)) { 4542c79a1751SLiu Bo cache = list_first_entry(&cur_trans->io_bgs, 4543c79a1751SLiu Bo struct btrfs_block_group_cache, 4544c79a1751SLiu Bo io_list); 4545c79a1751SLiu Bo if (!cache) { 4546c79a1751SLiu Bo btrfs_err(root->fs_info, 4547c79a1751SLiu Bo "orphan block group on io_bgs list"); 4548c79a1751SLiu Bo return; 4549c79a1751SLiu Bo } 4550c79a1751SLiu Bo 4551c79a1751SLiu Bo list_del_init(&cache->io_list); 4552c79a1751SLiu Bo spin_lock(&cache->lock); 4553c79a1751SLiu Bo cache->disk_cache_state = BTRFS_DC_ERROR; 4554c79a1751SLiu Bo spin_unlock(&cache->lock); 4555c79a1751SLiu Bo btrfs_cleanup_bg_io(cache); 4556c79a1751SLiu Bo } 4557c79a1751SLiu Bo } 4558c79a1751SLiu Bo 455949b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 456049b25e05SJeff Mahoney struct btrfs_root *root) 456149b25e05SJeff Mahoney { 4562c79a1751SLiu Bo btrfs_cleanup_dirty_bgs(cur_trans, root); 4563c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->dirty_bgs)); 4564c79a1751SLiu Bo ASSERT(list_empty(&cur_trans->io_bgs)); 4565c79a1751SLiu Bo 456649b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 456749b25e05SJeff Mahoney 45684a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_COMMIT_START; 456949b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 457049b25e05SJeff Mahoney 45714a9d8bdeSMiao Xie cur_trans->state = TRANS_STATE_UNBLOCKED; 457249b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 457349b25e05SJeff Mahoney 457467cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 457567cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 457667cde344SMiao Xie 457749b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 457849b25e05SJeff Mahoney EXTENT_DIRTY); 45796e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 45806e841e32SLiu Bo root->fs_info->pinned_extents); 458149b25e05SJeff Mahoney 45824a9d8bdeSMiao Xie cur_trans->state =TRANS_STATE_COMPLETED; 45834a9d8bdeSMiao Xie wake_up(&cur_trans->commit_wait); 45844a9d8bdeSMiao Xie 458549b25e05SJeff Mahoney /* 458649b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 458749b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 458849b25e05SJeff Mahoney */ 458949b25e05SJeff Mahoney } 459049b25e05SJeff Mahoney 459148a3b636SEric Sandeen static int btrfs_cleanup_transaction(struct btrfs_root *root) 4592acce952bSliubo { 4593acce952bSliubo struct btrfs_transaction *t; 4594acce952bSliubo 4595acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 4596acce952bSliubo 4597a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4598724e2315SJosef Bacik while (!list_empty(&root->fs_info->trans_list)) { 4599724e2315SJosef Bacik t = list_first_entry(&root->fs_info->trans_list, 4600724e2315SJosef Bacik struct btrfs_transaction, list); 4601724e2315SJosef Bacik if (t->state >= TRANS_STATE_COMMIT_START) { 4602724e2315SJosef Bacik atomic_inc(&t->use_count); 4603724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4604724e2315SJosef Bacik btrfs_wait_for_commit(root, t->transid); 4605724e2315SJosef Bacik btrfs_put_transaction(t); 4606724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4607724e2315SJosef Bacik continue; 4608724e2315SJosef Bacik } 4609724e2315SJosef Bacik if (t == root->fs_info->running_transaction) { 4610724e2315SJosef Bacik t->state = TRANS_STATE_COMMIT_DOING; 4611724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4612724e2315SJosef Bacik /* 4613724e2315SJosef Bacik * We wait for 0 num_writers since we don't hold a trans 4614724e2315SJosef Bacik * handle open currently for this transaction. 4615724e2315SJosef Bacik */ 4616724e2315SJosef Bacik wait_event(t->writer_wait, 4617724e2315SJosef Bacik atomic_read(&t->num_writers) == 0); 4618724e2315SJosef Bacik } else { 4619724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4620724e2315SJosef Bacik } 4621724e2315SJosef Bacik btrfs_cleanup_one_transaction(t, root); 4622724e2315SJosef Bacik 4623724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4624724e2315SJosef Bacik if (t == root->fs_info->running_transaction) 4625ac673879SMiao Xie root->fs_info->running_transaction = NULL; 4626724e2315SJosef Bacik list_del_init(&t->list); 4627a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4628a4abeea4SJosef Bacik 4629724e2315SJosef Bacik btrfs_put_transaction(t); 4630724e2315SJosef Bacik trace_btrfs_transaction_commit(root); 4631724e2315SJosef Bacik spin_lock(&root->fs_info->trans_lock); 4632724e2315SJosef Bacik } 4633724e2315SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 4634199c2a9cSMiao Xie btrfs_destroy_all_ordered_extents(root->fs_info); 463567cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 463667cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 4637724e2315SJosef Bacik btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); 4638eb73c1b7SMiao Xie btrfs_destroy_all_delalloc_inodes(root->fs_info); 4639acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 4640acce952bSliubo 4641acce952bSliubo return 0; 4642acce952bSliubo } 4643acce952bSliubo 4644e8c9f186SDavid Sterba static const struct extent_io_ops btree_extent_io_ops = { 4645ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 46464bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 46470b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 4648239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 4649239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 46500da5468fSChris Mason }; 4651