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> 28a74a4b97SChris Mason #include <linux/freezer.h> 29163e783eSDavid Woodhouse #include <linux/crc32c.h> 305a0e3ad6STejun Heo #include <linux/slab.h> 31784b4e29SChris Mason #include <linux/migrate.h> 327a36ddecSDavid Sterba #include <linux/ratelimit.h> 337e75bf3fSDavid Sterba #include <asm/unaligned.h> 344b4e25f2SChris Mason #include "compat.h" 35eb60ceacSChris Mason #include "ctree.h" 36eb60ceacSChris Mason #include "disk-io.h" 37e089f05cSChris Mason #include "transaction.h" 380f7d52f4SChris Mason #include "btrfs_inode.h" 390b86a832SChris Mason #include "volumes.h" 40db94535dSChris Mason #include "print-tree.h" 418b712842SChris Mason #include "async-thread.h" 42925baeddSChris Mason #include "locking.h" 43e02119d5SChris Mason #include "tree-log.h" 44fa9c0d79SChris Mason #include "free-space-cache.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" 50eb60ceacSChris Mason 51de0022b9SJosef Bacik #ifdef CONFIG_X86 52de0022b9SJosef Bacik #include <asm/cpufeature.h> 53de0022b9SJosef Bacik #endif 54de0022b9SJosef Bacik 55d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops; 568b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work); 574df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root); 58fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 59acce952bSliubo int read_only); 60569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 61569e0f35SJosef Bacik struct btrfs_root *root); 62143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root); 63acce952bSliubo static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 64acce952bSliubo struct btrfs_root *root); 65aec8030aSMiao Xie static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t); 66143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); 67acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 68acce952bSliubo struct extent_io_tree *dirty_pages, 69acce952bSliubo int mark); 70acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 71acce952bSliubo struct extent_io_tree *pinned_extents); 72ce9adaa5SChris Mason 73d352ac68SChris Mason /* 74d352ac68SChris Mason * end_io_wq structs are used to do processing in task context when an IO is 75d352ac68SChris Mason * complete. This is used during reads to verify checksums, and it is used 76d352ac68SChris Mason * by writes to insert metadata for new file extents after IO is complete. 77d352ac68SChris Mason */ 78ce9adaa5SChris Mason struct end_io_wq { 79ce9adaa5SChris Mason struct bio *bio; 80ce9adaa5SChris Mason bio_end_io_t *end_io; 81ce9adaa5SChris Mason void *private; 82ce9adaa5SChris Mason struct btrfs_fs_info *info; 83ce9adaa5SChris Mason int error; 8422c59948SChris Mason int metadata; 85ce9adaa5SChris Mason struct list_head list; 868b712842SChris Mason struct btrfs_work work; 87ce9adaa5SChris Mason }; 880da5468fSChris Mason 89d352ac68SChris Mason /* 90d352ac68SChris Mason * async submit bios are used to offload expensive checksumming 91d352ac68SChris Mason * onto the worker threads. They checksum file and metadata bios 92d352ac68SChris Mason * just before they are sent down the IO stack. 93d352ac68SChris Mason */ 9444b8bd7eSChris Mason struct async_submit_bio { 9544b8bd7eSChris Mason struct inode *inode; 9644b8bd7eSChris Mason struct bio *bio; 9744b8bd7eSChris Mason struct list_head list; 984a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start; 994a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done; 10044b8bd7eSChris Mason int rw; 10144b8bd7eSChris Mason int mirror_num; 102c8b97818SChris Mason unsigned long bio_flags; 103eaf25d93SChris Mason /* 104eaf25d93SChris Mason * bio_offset is optional, can be used if the pages in the bio 105eaf25d93SChris Mason * can't tell us where in the file the bio should go 106eaf25d93SChris Mason */ 107eaf25d93SChris Mason u64 bio_offset; 1088b712842SChris Mason struct btrfs_work work; 10979787eaaSJeff Mahoney int error; 11044b8bd7eSChris Mason }; 11144b8bd7eSChris Mason 11285d4e461SChris Mason /* 11385d4e461SChris Mason * Lockdep class keys for extent_buffer->lock's in this root. For a given 11485d4e461SChris Mason * eb, the lockdep key is determined by the btrfs_root it belongs to and 11585d4e461SChris Mason * the level the eb occupies in the tree. 1164008c04aSChris Mason * 11785d4e461SChris Mason * Different roots are used for different purposes and may nest inside each 11885d4e461SChris Mason * other and they require separate keysets. As lockdep keys should be 11985d4e461SChris Mason * static, assign keysets according to the purpose of the root as indicated 12085d4e461SChris Mason * by btrfs_root->objectid. This ensures that all special purpose roots 12185d4e461SChris Mason * have separate keysets. 1224008c04aSChris Mason * 12385d4e461SChris Mason * Lock-nesting across peer nodes is always done with the immediate parent 12485d4e461SChris Mason * node locked thus preventing deadlock. As lockdep doesn't know this, use 12585d4e461SChris Mason * subclass to avoid triggering lockdep warning in such cases. 1264008c04aSChris Mason * 12785d4e461SChris Mason * The key is set by the readpage_end_io_hook after the buffer has passed 12885d4e461SChris Mason * csum validation but before the pages are unlocked. It is also set by 12985d4e461SChris Mason * btrfs_init_new_buffer on freshly allocated blocks. 13085d4e461SChris Mason * 13185d4e461SChris Mason * We also add a check to make sure the highest level of the tree is the 13285d4e461SChris Mason * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code 13385d4e461SChris Mason * needs update as well. 1344008c04aSChris Mason */ 1354008c04aSChris Mason #ifdef CONFIG_DEBUG_LOCK_ALLOC 1364008c04aSChris Mason # if BTRFS_MAX_LEVEL != 8 1374008c04aSChris Mason # error 1384008c04aSChris Mason # endif 13985d4e461SChris Mason 14085d4e461SChris Mason static struct btrfs_lockdep_keyset { 14185d4e461SChris Mason u64 id; /* root objectid */ 14285d4e461SChris Mason const char *name_stem; /* lock name stem */ 14385d4e461SChris Mason char names[BTRFS_MAX_LEVEL + 1][20]; 14485d4e461SChris Mason struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; 14585d4e461SChris Mason } btrfs_lockdep_keysets[] = { 14685d4e461SChris Mason { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, 14785d4e461SChris Mason { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, 14885d4e461SChris Mason { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, 14985d4e461SChris Mason { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, 15085d4e461SChris Mason { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, 15185d4e461SChris Mason { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, 15285d4e461SChris Mason { .id = BTRFS_ORPHAN_OBJECTID, .name_stem = "orphan" }, 15385d4e461SChris Mason { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, 15485d4e461SChris Mason { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, 15585d4e461SChris Mason { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, 15685d4e461SChris Mason { .id = 0, .name_stem = "tree" }, 1574008c04aSChris Mason }; 15885d4e461SChris Mason 15985d4e461SChris Mason void __init btrfs_init_lockdep(void) 16085d4e461SChris Mason { 16185d4e461SChris Mason int i, j; 16285d4e461SChris Mason 16385d4e461SChris Mason /* initialize lockdep class names */ 16485d4e461SChris Mason for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { 16585d4e461SChris Mason struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; 16685d4e461SChris Mason 16785d4e461SChris Mason for (j = 0; j < ARRAY_SIZE(ks->names); j++) 16885d4e461SChris Mason snprintf(ks->names[j], sizeof(ks->names[j]), 16985d4e461SChris Mason "btrfs-%s-%02d", ks->name_stem, j); 17085d4e461SChris Mason } 17185d4e461SChris Mason } 17285d4e461SChris Mason 17385d4e461SChris Mason void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, 17485d4e461SChris Mason int level) 17585d4e461SChris Mason { 17685d4e461SChris Mason struct btrfs_lockdep_keyset *ks; 17785d4e461SChris Mason 17885d4e461SChris Mason BUG_ON(level >= ARRAY_SIZE(ks->keys)); 17985d4e461SChris Mason 18085d4e461SChris Mason /* find the matching keyset, id 0 is the default entry */ 18185d4e461SChris Mason for (ks = btrfs_lockdep_keysets; ks->id; ks++) 18285d4e461SChris Mason if (ks->id == objectid) 18385d4e461SChris Mason break; 18485d4e461SChris Mason 18585d4e461SChris Mason lockdep_set_class_and_name(&eb->lock, 18685d4e461SChris Mason &ks->keys[level], ks->names[level]); 18785d4e461SChris Mason } 18885d4e461SChris Mason 1894008c04aSChris Mason #endif 1904008c04aSChris Mason 191d352ac68SChris Mason /* 192d352ac68SChris Mason * extents on the btree inode are pretty simple, there's one extent 193d352ac68SChris Mason * that covers the entire device 194d352ac68SChris Mason */ 195b2950863SChristoph Hellwig static struct extent_map *btree_get_extent(struct inode *inode, 196306e16ceSDavid Sterba struct page *page, size_t pg_offset, u64 start, u64 len, 1975f39d397SChris Mason int create) 1985f39d397SChris Mason { 1995f39d397SChris Mason struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; 2005f39d397SChris Mason struct extent_map *em; 2015f39d397SChris Mason int ret; 2025f39d397SChris Mason 203890871beSChris Mason read_lock(&em_tree->lock); 204d1310b2eSChris Mason em = lookup_extent_mapping(em_tree, start, len); 205a061fc8dSChris Mason if (em) { 206a061fc8dSChris Mason em->bdev = 207a061fc8dSChris Mason BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 208890871beSChris Mason read_unlock(&em_tree->lock); 2095f39d397SChris Mason goto out; 210a061fc8dSChris Mason } 211890871beSChris Mason read_unlock(&em_tree->lock); 2127b13b7b1SChris Mason 213172ddd60SDavid Sterba em = alloc_extent_map(); 2145f39d397SChris Mason if (!em) { 2155f39d397SChris Mason em = ERR_PTR(-ENOMEM); 2165f39d397SChris Mason goto out; 2175f39d397SChris Mason } 2185f39d397SChris Mason em->start = 0; 2190afbaf8cSChris Mason em->len = (u64)-1; 220c8b97818SChris Mason em->block_len = (u64)-1; 2215f39d397SChris Mason em->block_start = 0; 222a061fc8dSChris Mason em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; 223d1310b2eSChris Mason 224890871beSChris Mason write_lock(&em_tree->lock); 22509a2a8f9SJosef Bacik ret = add_extent_mapping(em_tree, em, 0); 2265f39d397SChris Mason if (ret == -EEXIST) { 2275f39d397SChris Mason free_extent_map(em); 2287b13b7b1SChris Mason em = lookup_extent_mapping(em_tree, start, len); 229b4f359abSTsutomu Itoh if (!em) 2300433f20dSTsutomu Itoh em = ERR_PTR(-EIO); 2315f39d397SChris Mason } else if (ret) { 2327b13b7b1SChris Mason free_extent_map(em); 2330433f20dSTsutomu Itoh em = ERR_PTR(ret); 2345f39d397SChris Mason } 235890871beSChris Mason write_unlock(&em_tree->lock); 2367b13b7b1SChris Mason 2375f39d397SChris Mason out: 2385f39d397SChris Mason return em; 2395f39d397SChris Mason } 2405f39d397SChris Mason 241b0496686SLiu Bo u32 btrfs_csum_data(char *data, u32 seed, size_t len) 24219c00ddcSChris Mason { 243163e783eSDavid Woodhouse return crc32c(seed, data, len); 24419c00ddcSChris Mason } 24519c00ddcSChris Mason 24619c00ddcSChris Mason void btrfs_csum_final(u32 crc, char *result) 24719c00ddcSChris Mason { 2487e75bf3fSDavid Sterba put_unaligned_le32(~crc, result); 24919c00ddcSChris Mason } 25019c00ddcSChris Mason 251d352ac68SChris Mason /* 252d352ac68SChris Mason * compute the csum for a btree block, and either verify it or write it 253d352ac68SChris Mason * into the csum field of the block. 254d352ac68SChris Mason */ 25519c00ddcSChris Mason static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, 25619c00ddcSChris Mason int verify) 25719c00ddcSChris Mason { 2586c41761fSDavid Sterba u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); 259607d432dSJosef Bacik char *result = NULL; 26019c00ddcSChris Mason unsigned long len; 26119c00ddcSChris Mason unsigned long cur_len; 26219c00ddcSChris Mason unsigned long offset = BTRFS_CSUM_SIZE; 26319c00ddcSChris Mason char *kaddr; 26419c00ddcSChris Mason unsigned long map_start; 26519c00ddcSChris Mason unsigned long map_len; 26619c00ddcSChris Mason int err; 26719c00ddcSChris Mason u32 crc = ~(u32)0; 268607d432dSJosef Bacik unsigned long inline_result; 26919c00ddcSChris Mason 27019c00ddcSChris Mason len = buf->len - offset; 27119c00ddcSChris Mason while (len > 0) { 27219c00ddcSChris Mason err = map_private_extent_buffer(buf, offset, 32, 273a6591715SChris Mason &kaddr, &map_start, &map_len); 274d397712bSChris Mason if (err) 27519c00ddcSChris Mason return 1; 27619c00ddcSChris Mason cur_len = min(len, map_len - (offset - map_start)); 277b0496686SLiu Bo crc = btrfs_csum_data(kaddr + offset - map_start, 27819c00ddcSChris Mason crc, cur_len); 27919c00ddcSChris Mason len -= cur_len; 28019c00ddcSChris Mason offset += cur_len; 28119c00ddcSChris Mason } 282607d432dSJosef Bacik if (csum_size > sizeof(inline_result)) { 283607d432dSJosef Bacik result = kzalloc(csum_size * sizeof(char), GFP_NOFS); 284607d432dSJosef Bacik if (!result) 285607d432dSJosef Bacik return 1; 286607d432dSJosef Bacik } else { 287607d432dSJosef Bacik result = (char *)&inline_result; 288607d432dSJosef Bacik } 289607d432dSJosef Bacik 29019c00ddcSChris Mason btrfs_csum_final(crc, result); 29119c00ddcSChris Mason 29219c00ddcSChris Mason if (verify) { 293607d432dSJosef Bacik if (memcmp_extent_buffer(buf, result, 0, csum_size)) { 294e4204dedSChris Mason u32 val; 295e4204dedSChris Mason u32 found = 0; 296607d432dSJosef Bacik memcpy(&found, result, csum_size); 297e4204dedSChris Mason 298607d432dSJosef Bacik read_extent_buffer(buf, &val, 0, csum_size); 2997a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " 300193f284dSChris Mason "failed on %llu wanted %X found %X " 301193f284dSChris Mason "level %d\n", 30219c00ddcSChris Mason root->fs_info->sb->s_id, 303193f284dSChris Mason (unsigned long long)buf->start, val, found, 304193f284dSChris Mason btrfs_header_level(buf)); 305607d432dSJosef Bacik if (result != (char *)&inline_result) 306607d432dSJosef Bacik kfree(result); 30719c00ddcSChris Mason return 1; 30819c00ddcSChris Mason } 30919c00ddcSChris Mason } else { 310607d432dSJosef Bacik write_extent_buffer(buf, result, 0, csum_size); 31119c00ddcSChris Mason } 312607d432dSJosef Bacik if (result != (char *)&inline_result) 313607d432dSJosef Bacik kfree(result); 31419c00ddcSChris Mason return 0; 31519c00ddcSChris Mason } 31619c00ddcSChris Mason 317d352ac68SChris Mason /* 318d352ac68SChris Mason * we can't consider a given block up to date unless the transid of the 319d352ac68SChris Mason * block matches the transid in the parent node's pointer. This is how we 320d352ac68SChris Mason * detect blocks that either didn't get written at all or got written 321d352ac68SChris Mason * in the wrong place. 322d352ac68SChris Mason */ 3231259ab75SChris Mason static int verify_parent_transid(struct extent_io_tree *io_tree, 324b9fab919SChris Mason struct extent_buffer *eb, u64 parent_transid, 325b9fab919SChris Mason int atomic) 3261259ab75SChris Mason { 3272ac55d41SJosef Bacik struct extent_state *cached_state = NULL; 3281259ab75SChris Mason int ret; 3291259ab75SChris Mason 3301259ab75SChris Mason if (!parent_transid || btrfs_header_generation(eb) == parent_transid) 3311259ab75SChris Mason return 0; 3321259ab75SChris Mason 333b9fab919SChris Mason if (atomic) 334b9fab919SChris Mason return -EAGAIN; 335b9fab919SChris Mason 3362ac55d41SJosef Bacik lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, 337d0082371SJeff Mahoney 0, &cached_state); 3380b32f4bbSJosef Bacik if (extent_buffer_uptodate(eb) && 3391259ab75SChris Mason btrfs_header_generation(eb) == parent_transid) { 3401259ab75SChris Mason ret = 0; 3411259ab75SChris Mason goto out; 3421259ab75SChris Mason } 3437a36ddecSDavid Sterba printk_ratelimited("parent transid verify failed on %llu wanted %llu " 344193f284dSChris Mason "found %llu\n", 3451259ab75SChris Mason (unsigned long long)eb->start, 3461259ab75SChris Mason (unsigned long long)parent_transid, 3471259ab75SChris Mason (unsigned long long)btrfs_header_generation(eb)); 3481259ab75SChris Mason ret = 1; 3490b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 35033958dc6SChris Mason out: 3512ac55d41SJosef Bacik unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, 3522ac55d41SJosef Bacik &cached_state, GFP_NOFS); 3531259ab75SChris Mason return ret; 3541259ab75SChris Mason } 3551259ab75SChris Mason 356d352ac68SChris Mason /* 357d352ac68SChris Mason * helper to read a given tree block, doing retries as required when 358d352ac68SChris Mason * the checksums don't match and we have alternate mirrors to try. 359d352ac68SChris Mason */ 360f188591eSChris Mason static int btree_read_extent_buffer_pages(struct btrfs_root *root, 361f188591eSChris Mason struct extent_buffer *eb, 362ca7a79adSChris Mason u64 start, u64 parent_transid) 363f188591eSChris Mason { 364f188591eSChris Mason struct extent_io_tree *io_tree; 365ea466794SJosef Bacik int failed = 0; 366f188591eSChris Mason int ret; 367f188591eSChris Mason int num_copies = 0; 368f188591eSChris Mason int mirror_num = 0; 369ea466794SJosef Bacik int failed_mirror = 0; 370f188591eSChris Mason 371a826d6dcSJosef Bacik clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 372f188591eSChris Mason io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; 373f188591eSChris Mason while (1) { 374bb82ab88SArne Jansen ret = read_extent_buffer_pages(io_tree, eb, start, 375bb82ab88SArne Jansen WAIT_COMPLETE, 376f188591eSChris Mason btree_get_extent, mirror_num); 377256dd1bbSStefan Behrens if (!ret) { 378256dd1bbSStefan Behrens if (!verify_parent_transid(io_tree, eb, 379b9fab919SChris Mason parent_transid, 0)) 380ea466794SJosef Bacik break; 381256dd1bbSStefan Behrens else 382256dd1bbSStefan Behrens ret = -EIO; 383256dd1bbSStefan Behrens } 384d397712bSChris Mason 385a826d6dcSJosef Bacik /* 386a826d6dcSJosef Bacik * This buffer's crc is fine, but its contents are corrupted, so 387a826d6dcSJosef Bacik * there is no reason to read the other copies, they won't be 388a826d6dcSJosef Bacik * any less wrong. 389a826d6dcSJosef Bacik */ 390a826d6dcSJosef Bacik if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) 391ea466794SJosef Bacik break; 392ea466794SJosef Bacik 3935d964051SStefan Behrens num_copies = btrfs_num_copies(root->fs_info, 394f188591eSChris Mason eb->start, eb->len); 3954235298eSChris Mason if (num_copies == 1) 396ea466794SJosef Bacik break; 3974235298eSChris Mason 3985cf1ab56SJosef Bacik if (!failed_mirror) { 3995cf1ab56SJosef Bacik failed = 1; 4005cf1ab56SJosef Bacik failed_mirror = eb->read_mirror; 4015cf1ab56SJosef Bacik } 4025cf1ab56SJosef Bacik 403f188591eSChris Mason mirror_num++; 404ea466794SJosef Bacik if (mirror_num == failed_mirror) 405ea466794SJosef Bacik mirror_num++; 406ea466794SJosef Bacik 4074235298eSChris Mason if (mirror_num > num_copies) 408ea466794SJosef Bacik break; 409f188591eSChris Mason } 410ea466794SJosef Bacik 411c0901581SStefan Behrens if (failed && !ret && failed_mirror) 412ea466794SJosef Bacik repair_eb_io_failure(root, eb, failed_mirror); 413ea466794SJosef Bacik 414ea466794SJosef Bacik return ret; 415f188591eSChris Mason } 41619c00ddcSChris Mason 417d352ac68SChris Mason /* 418d397712bSChris Mason * checksum a dirty tree block before IO. This has extra checks to make sure 419d397712bSChris Mason * we only fill in the checksum field in the first page of a multi-page block 420d352ac68SChris Mason */ 421d397712bSChris Mason 422b2950863SChristoph Hellwig static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 42319c00ddcSChris Mason { 424d1310b2eSChris Mason struct extent_io_tree *tree; 4254eee4fa4SMiao Xie u64 start = page_offset(page); 42619c00ddcSChris Mason u64 found_start; 42719c00ddcSChris Mason struct extent_buffer *eb; 428f188591eSChris Mason 429d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 43019c00ddcSChris Mason 4314f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 4324f2de97aSJosef Bacik if (page != eb->pages[0]) 4334f2de97aSJosef Bacik return 0; 43419c00ddcSChris Mason found_start = btrfs_header_bytenr(eb); 43519c00ddcSChris Mason if (found_start != start) { 43655c69072SChris Mason WARN_ON(1); 4374f2de97aSJosef Bacik return 0; 43855c69072SChris Mason } 43955c69072SChris Mason if (!PageUptodate(page)) { 44055c69072SChris Mason WARN_ON(1); 4414f2de97aSJosef Bacik return 0; 44219c00ddcSChris Mason } 44319c00ddcSChris Mason csum_tree_block(root, eb, 0); 44419c00ddcSChris Mason return 0; 44519c00ddcSChris Mason } 44619c00ddcSChris Mason 4472b82032cSYan Zheng static int check_tree_block_fsid(struct btrfs_root *root, 4482b82032cSYan Zheng struct extent_buffer *eb) 4492b82032cSYan Zheng { 4502b82032cSYan Zheng struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; 4512b82032cSYan Zheng u8 fsid[BTRFS_UUID_SIZE]; 4522b82032cSYan Zheng int ret = 1; 4532b82032cSYan Zheng 4542b82032cSYan Zheng read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), 4552b82032cSYan Zheng BTRFS_FSID_SIZE); 4562b82032cSYan Zheng while (fs_devices) { 4572b82032cSYan Zheng if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { 4582b82032cSYan Zheng ret = 0; 4592b82032cSYan Zheng break; 4602b82032cSYan Zheng } 4612b82032cSYan Zheng fs_devices = fs_devices->seed; 4622b82032cSYan Zheng } 4632b82032cSYan Zheng return ret; 4642b82032cSYan Zheng } 4652b82032cSYan Zheng 466a826d6dcSJosef Bacik #define CORRUPT(reason, eb, root, slot) \ 467a826d6dcSJosef Bacik printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ 468a826d6dcSJosef Bacik "root=%llu, slot=%d\n", reason, \ 469a826d6dcSJosef Bacik (unsigned long long)btrfs_header_bytenr(eb), \ 470a826d6dcSJosef Bacik (unsigned long long)root->objectid, slot) 471a826d6dcSJosef Bacik 472a826d6dcSJosef Bacik static noinline int check_leaf(struct btrfs_root *root, 473a826d6dcSJosef Bacik struct extent_buffer *leaf) 474a826d6dcSJosef Bacik { 475a826d6dcSJosef Bacik struct btrfs_key key; 476a826d6dcSJosef Bacik struct btrfs_key leaf_key; 477a826d6dcSJosef Bacik u32 nritems = btrfs_header_nritems(leaf); 478a826d6dcSJosef Bacik int slot; 479a826d6dcSJosef Bacik 480a826d6dcSJosef Bacik if (nritems == 0) 481a826d6dcSJosef Bacik return 0; 482a826d6dcSJosef Bacik 483a826d6dcSJosef Bacik /* Check the 0 item */ 484a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != 485a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 486a826d6dcSJosef Bacik CORRUPT("invalid item offset size pair", leaf, root, 0); 487a826d6dcSJosef Bacik return -EIO; 488a826d6dcSJosef Bacik } 489a826d6dcSJosef Bacik 490a826d6dcSJosef Bacik /* 491a826d6dcSJosef Bacik * Check to make sure each items keys are in the correct order and their 492a826d6dcSJosef Bacik * offsets make sense. We only have to loop through nritems-1 because 493a826d6dcSJosef Bacik * we check the current slot against the next slot, which verifies the 494a826d6dcSJosef Bacik * next slot's offset+size makes sense and that the current's slot 495a826d6dcSJosef Bacik * offset is correct. 496a826d6dcSJosef Bacik */ 497a826d6dcSJosef Bacik for (slot = 0; slot < nritems - 1; slot++) { 498a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &leaf_key, slot); 499a826d6dcSJosef Bacik btrfs_item_key_to_cpu(leaf, &key, slot + 1); 500a826d6dcSJosef Bacik 501a826d6dcSJosef Bacik /* Make sure the keys are in the right order */ 502a826d6dcSJosef Bacik if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { 503a826d6dcSJosef Bacik CORRUPT("bad key order", leaf, root, slot); 504a826d6dcSJosef Bacik return -EIO; 505a826d6dcSJosef Bacik } 506a826d6dcSJosef Bacik 507a826d6dcSJosef Bacik /* 508a826d6dcSJosef Bacik * Make sure the offset and ends are right, remember that the 509a826d6dcSJosef Bacik * item data starts at the end of the leaf and grows towards the 510a826d6dcSJosef Bacik * front. 511a826d6dcSJosef Bacik */ 512a826d6dcSJosef Bacik if (btrfs_item_offset_nr(leaf, slot) != 513a826d6dcSJosef Bacik btrfs_item_end_nr(leaf, slot + 1)) { 514a826d6dcSJosef Bacik CORRUPT("slot offset bad", leaf, root, slot); 515a826d6dcSJosef Bacik return -EIO; 516a826d6dcSJosef Bacik } 517a826d6dcSJosef Bacik 518a826d6dcSJosef Bacik /* 519a826d6dcSJosef Bacik * Check to make sure that we don't point outside of the leaf, 520a826d6dcSJosef Bacik * just incase all the items are consistent to eachother, but 521a826d6dcSJosef Bacik * all point outside of the leaf. 522a826d6dcSJosef Bacik */ 523a826d6dcSJosef Bacik if (btrfs_item_end_nr(leaf, slot) > 524a826d6dcSJosef Bacik BTRFS_LEAF_DATA_SIZE(root)) { 525a826d6dcSJosef Bacik CORRUPT("slot end outside of leaf", leaf, root, slot); 526a826d6dcSJosef Bacik return -EIO; 527a826d6dcSJosef Bacik } 528a826d6dcSJosef Bacik } 529a826d6dcSJosef Bacik 530a826d6dcSJosef Bacik return 0; 531a826d6dcSJosef Bacik } 532a826d6dcSJosef Bacik 533727011e0SChris Mason struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree, 534727011e0SChris Mason struct page *page, int max_walk) 535727011e0SChris Mason { 536727011e0SChris Mason struct extent_buffer *eb; 537727011e0SChris Mason u64 start = page_offset(page); 538727011e0SChris Mason u64 target = start; 539727011e0SChris Mason u64 min_start; 540727011e0SChris Mason 541727011e0SChris Mason if (start < max_walk) 542727011e0SChris Mason min_start = 0; 543727011e0SChris Mason else 544727011e0SChris Mason min_start = start - max_walk; 545727011e0SChris Mason 546727011e0SChris Mason while (start >= min_start) { 547727011e0SChris Mason eb = find_extent_buffer(tree, start, 0); 548727011e0SChris Mason if (eb) { 549727011e0SChris Mason /* 550727011e0SChris Mason * we found an extent buffer and it contains our page 551727011e0SChris Mason * horray! 552727011e0SChris Mason */ 553727011e0SChris Mason if (eb->start <= target && 554727011e0SChris Mason eb->start + eb->len > target) 555727011e0SChris Mason return eb; 556727011e0SChris Mason 557727011e0SChris Mason /* we found an extent buffer that wasn't for us */ 558727011e0SChris Mason free_extent_buffer(eb); 559727011e0SChris Mason return NULL; 560727011e0SChris Mason } 561727011e0SChris Mason if (start == 0) 562727011e0SChris Mason break; 563727011e0SChris Mason start -= PAGE_CACHE_SIZE; 564727011e0SChris Mason } 565727011e0SChris Mason return NULL; 566727011e0SChris Mason } 567727011e0SChris Mason 568b2950863SChristoph Hellwig static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, 5695cf1ab56SJosef Bacik struct extent_state *state, int mirror) 570ce9adaa5SChris Mason { 571ce9adaa5SChris Mason struct extent_io_tree *tree; 572ce9adaa5SChris Mason u64 found_start; 573ce9adaa5SChris Mason int found_level; 574ce9adaa5SChris Mason struct extent_buffer *eb; 575ce9adaa5SChris Mason struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 576f188591eSChris Mason int ret = 0; 577727011e0SChris Mason int reads_done; 578ce9adaa5SChris Mason 579ce9adaa5SChris Mason if (!page->private) 580ce9adaa5SChris Mason goto out; 581d397712bSChris Mason 582727011e0SChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 5834f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 584d397712bSChris Mason 5850b32f4bbSJosef Bacik /* the pending IO might have been the only thing that kept this buffer 5860b32f4bbSJosef Bacik * in memory. Make sure we have a ref for all this other checks 5870b32f4bbSJosef Bacik */ 5880b32f4bbSJosef Bacik extent_buffer_get(eb); 5890b32f4bbSJosef Bacik 5900b32f4bbSJosef Bacik reads_done = atomic_dec_and_test(&eb->io_pages); 591727011e0SChris Mason if (!reads_done) 592727011e0SChris Mason goto err; 593f188591eSChris Mason 5945cf1ab56SJosef Bacik eb->read_mirror = mirror; 595ea466794SJosef Bacik if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { 596ea466794SJosef Bacik ret = -EIO; 597ea466794SJosef Bacik goto err; 598ea466794SJosef Bacik } 599ea466794SJosef Bacik 600ce9adaa5SChris Mason found_start = btrfs_header_bytenr(eb); 601727011e0SChris Mason if (found_start != eb->start) { 6027a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad tree block start " 603193f284dSChris Mason "%llu %llu\n", 604a1b32a59SChris Mason (unsigned long long)found_start, 605a1b32a59SChris Mason (unsigned long long)eb->start); 606f188591eSChris Mason ret = -EIO; 607ce9adaa5SChris Mason goto err; 608ce9adaa5SChris Mason } 6092b82032cSYan Zheng if (check_tree_block_fsid(root, eb)) { 6107a36ddecSDavid Sterba printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", 611d397712bSChris Mason (unsigned long long)eb->start); 6121259ab75SChris Mason ret = -EIO; 6131259ab75SChris Mason goto err; 6141259ab75SChris Mason } 615ce9adaa5SChris Mason found_level = btrfs_header_level(eb); 6161c24c3ceSJosef Bacik if (found_level >= BTRFS_MAX_LEVEL) { 6171c24c3ceSJosef Bacik btrfs_info(root->fs_info, "bad tree block level %d\n", 6181c24c3ceSJosef Bacik (int)btrfs_header_level(eb)); 6191c24c3ceSJosef Bacik ret = -EIO; 6201c24c3ceSJosef Bacik goto err; 6211c24c3ceSJosef Bacik } 622ce9adaa5SChris Mason 62385d4e461SChris Mason btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), 62485d4e461SChris Mason eb, found_level); 6254008c04aSChris Mason 626ce9adaa5SChris Mason ret = csum_tree_block(root, eb, 1); 627a826d6dcSJosef Bacik if (ret) { 628f188591eSChris Mason ret = -EIO; 629a826d6dcSJosef Bacik goto err; 630a826d6dcSJosef Bacik } 631a826d6dcSJosef Bacik 632a826d6dcSJosef Bacik /* 633a826d6dcSJosef Bacik * If this is a leaf block and it is corrupt, set the corrupt bit so 634a826d6dcSJosef Bacik * that we don't try and read the other copies of this block, just 635a826d6dcSJosef Bacik * return -EIO. 636a826d6dcSJosef Bacik */ 637a826d6dcSJosef Bacik if (found_level == 0 && check_leaf(root, eb)) { 638a826d6dcSJosef Bacik set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); 639a826d6dcSJosef Bacik ret = -EIO; 640a826d6dcSJosef Bacik } 641ce9adaa5SChris Mason 6420b32f4bbSJosef Bacik if (!ret) 6430b32f4bbSJosef Bacik set_extent_buffer_uptodate(eb); 644ce9adaa5SChris Mason err: 64579fb65a1SJosef Bacik if (reads_done && 64679fb65a1SJosef Bacik test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6474bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, ret); 6484bb31e92SArne Jansen 64953b381b3SDavid Woodhouse if (ret) { 65053b381b3SDavid Woodhouse /* 65153b381b3SDavid Woodhouse * our io error hook is going to dec the io pages 65253b381b3SDavid Woodhouse * again, we have to make sure it has something 65353b381b3SDavid Woodhouse * to decrement 65453b381b3SDavid Woodhouse */ 65553b381b3SDavid Woodhouse atomic_inc(&eb->io_pages); 6560b32f4bbSJosef Bacik clear_extent_buffer_uptodate(eb); 65753b381b3SDavid Woodhouse } 6580b32f4bbSJosef Bacik free_extent_buffer(eb); 659ce9adaa5SChris Mason out: 660f188591eSChris Mason return ret; 661ce9adaa5SChris Mason } 662ce9adaa5SChris Mason 663ea466794SJosef Bacik static int btree_io_failed_hook(struct page *page, int failed_mirror) 6644bb31e92SArne Jansen { 6654bb31e92SArne Jansen struct extent_buffer *eb; 6664bb31e92SArne Jansen struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; 6674bb31e92SArne Jansen 6684f2de97aSJosef Bacik eb = (struct extent_buffer *)page->private; 669ea466794SJosef Bacik set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); 6705cf1ab56SJosef Bacik eb->read_mirror = failed_mirror; 67153b381b3SDavid Woodhouse atomic_dec(&eb->io_pages); 672ea466794SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) 6734bb31e92SArne Jansen btree_readahead_hook(root, eb, eb->start, -EIO); 6744bb31e92SArne Jansen return -EIO; /* we fixed nothing */ 6754bb31e92SArne Jansen } 6764bb31e92SArne Jansen 677ce9adaa5SChris Mason static void end_workqueue_bio(struct bio *bio, int err) 678ce9adaa5SChris Mason { 679ce9adaa5SChris Mason struct end_io_wq *end_io_wq = bio->bi_private; 680ce9adaa5SChris Mason struct btrfs_fs_info *fs_info; 681ce9adaa5SChris Mason 682ce9adaa5SChris Mason fs_info = end_io_wq->info; 683ce9adaa5SChris Mason end_io_wq->error = err; 6848b712842SChris Mason end_io_wq->work.func = end_workqueue_fn; 6858b712842SChris Mason end_io_wq->work.flags = 0; 686d20f7043SChris Mason 6877b6d91daSChristoph Hellwig if (bio->bi_rw & REQ_WRITE) { 68853b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) 689cad321adSChris Mason btrfs_queue_worker(&fs_info->endio_meta_write_workers, 690cad321adSChris Mason &end_io_wq->work); 69153b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) 6920cb59c99SJosef Bacik btrfs_queue_worker(&fs_info->endio_freespace_worker, 6930cb59c99SJosef Bacik &end_io_wq->work); 69453b381b3SDavid Woodhouse else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 69553b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 69653b381b3SDavid Woodhouse &end_io_wq->work); 697cad321adSChris Mason else 698e6dcd2dcSChris Mason btrfs_queue_worker(&fs_info->endio_write_workers, 699e6dcd2dcSChris Mason &end_io_wq->work); 700d20f7043SChris Mason } else { 70153b381b3SDavid Woodhouse if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) 70253b381b3SDavid Woodhouse btrfs_queue_worker(&fs_info->endio_raid56_workers, 70353b381b3SDavid Woodhouse &end_io_wq->work); 70453b381b3SDavid Woodhouse else if (end_io_wq->metadata) 705d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_meta_workers, 706d20f7043SChris Mason &end_io_wq->work); 707e6dcd2dcSChris Mason else 708d20f7043SChris Mason btrfs_queue_worker(&fs_info->endio_workers, 709d20f7043SChris Mason &end_io_wq->work); 710d20f7043SChris Mason } 711ce9adaa5SChris Mason } 712ce9adaa5SChris Mason 7130cb59c99SJosef Bacik /* 7140cb59c99SJosef Bacik * For the metadata arg you want 7150cb59c99SJosef Bacik * 7160cb59c99SJosef Bacik * 0 - if data 7170cb59c99SJosef Bacik * 1 - if normal metadta 7180cb59c99SJosef Bacik * 2 - if writing to the free space cache area 71953b381b3SDavid Woodhouse * 3 - raid parity work 7200cb59c99SJosef Bacik */ 72122c59948SChris Mason int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, 72222c59948SChris Mason int metadata) 7230b86a832SChris Mason { 724ce9adaa5SChris Mason struct end_io_wq *end_io_wq; 725ce9adaa5SChris Mason end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); 726ce9adaa5SChris Mason if (!end_io_wq) 727ce9adaa5SChris Mason return -ENOMEM; 728ce9adaa5SChris Mason 729ce9adaa5SChris Mason end_io_wq->private = bio->bi_private; 730ce9adaa5SChris Mason end_io_wq->end_io = bio->bi_end_io; 73122c59948SChris Mason end_io_wq->info = info; 732ce9adaa5SChris Mason end_io_wq->error = 0; 733ce9adaa5SChris Mason end_io_wq->bio = bio; 73422c59948SChris Mason end_io_wq->metadata = metadata; 735ce9adaa5SChris Mason 736ce9adaa5SChris Mason bio->bi_private = end_io_wq; 737ce9adaa5SChris Mason bio->bi_end_io = end_workqueue_bio; 73822c59948SChris Mason return 0; 73922c59948SChris Mason } 74022c59948SChris Mason 741b64a2851SChris Mason unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) 7424854ddd0SChris Mason { 7434854ddd0SChris Mason unsigned long limit = min_t(unsigned long, 7444854ddd0SChris Mason info->workers.max_workers, 7454854ddd0SChris Mason info->fs_devices->open_devices); 7464854ddd0SChris Mason return 256 * limit; 7474854ddd0SChris Mason } 7484854ddd0SChris Mason 7494a69a410SChris Mason static void run_one_async_start(struct btrfs_work *work) 7504a69a410SChris Mason { 7514a69a410SChris Mason struct async_submit_bio *async; 75279787eaaSJeff Mahoney int ret; 7534a69a410SChris Mason 7544a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 75579787eaaSJeff Mahoney ret = async->submit_bio_start(async->inode, async->rw, async->bio, 756eaf25d93SChris Mason async->mirror_num, async->bio_flags, 757eaf25d93SChris Mason async->bio_offset); 75879787eaaSJeff Mahoney if (ret) 75979787eaaSJeff Mahoney async->error = ret; 7604a69a410SChris Mason } 7614a69a410SChris Mason 7624a69a410SChris Mason static void run_one_async_done(struct btrfs_work *work) 7638b712842SChris Mason { 7648b712842SChris Mason struct btrfs_fs_info *fs_info; 7658b712842SChris Mason struct async_submit_bio *async; 7664854ddd0SChris Mason int limit; 7678b712842SChris Mason 7688b712842SChris Mason async = container_of(work, struct async_submit_bio, work); 7698b712842SChris Mason fs_info = BTRFS_I(async->inode)->root->fs_info; 7704854ddd0SChris Mason 771b64a2851SChris Mason limit = btrfs_async_submit_limit(fs_info); 7724854ddd0SChris Mason limit = limit * 2 / 3; 7734854ddd0SChris Mason 77466657b31SJosef Bacik if (atomic_dec_return(&fs_info->nr_async_submits) < limit && 775b64a2851SChris Mason waitqueue_active(&fs_info->async_submit_wait)) 7764854ddd0SChris Mason wake_up(&fs_info->async_submit_wait); 7774854ddd0SChris Mason 77879787eaaSJeff Mahoney /* If an error occured we just want to clean up the bio and move on */ 77979787eaaSJeff Mahoney if (async->error) { 78079787eaaSJeff Mahoney bio_endio(async->bio, async->error); 78179787eaaSJeff Mahoney return; 78279787eaaSJeff Mahoney } 78379787eaaSJeff Mahoney 7844a69a410SChris Mason async->submit_bio_done(async->inode, async->rw, async->bio, 785eaf25d93SChris Mason async->mirror_num, async->bio_flags, 786eaf25d93SChris Mason async->bio_offset); 7874a69a410SChris Mason } 7884a69a410SChris Mason 7894a69a410SChris Mason static void run_one_async_free(struct btrfs_work *work) 7904a69a410SChris Mason { 7914a69a410SChris Mason struct async_submit_bio *async; 7924a69a410SChris Mason 7934a69a410SChris Mason async = container_of(work, struct async_submit_bio, work); 7948b712842SChris Mason kfree(async); 7958b712842SChris Mason } 7968b712842SChris Mason 79744b8bd7eSChris Mason int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, 79844b8bd7eSChris Mason int rw, struct bio *bio, int mirror_num, 799c8b97818SChris Mason unsigned long bio_flags, 800eaf25d93SChris Mason u64 bio_offset, 8014a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_start, 8024a69a410SChris Mason extent_submit_bio_hook_t *submit_bio_done) 80344b8bd7eSChris Mason { 80444b8bd7eSChris Mason struct async_submit_bio *async; 80544b8bd7eSChris Mason 80644b8bd7eSChris Mason async = kmalloc(sizeof(*async), GFP_NOFS); 80744b8bd7eSChris Mason if (!async) 80844b8bd7eSChris Mason return -ENOMEM; 80944b8bd7eSChris Mason 81044b8bd7eSChris Mason async->inode = inode; 81144b8bd7eSChris Mason async->rw = rw; 81244b8bd7eSChris Mason async->bio = bio; 81344b8bd7eSChris Mason async->mirror_num = mirror_num; 8144a69a410SChris Mason async->submit_bio_start = submit_bio_start; 8154a69a410SChris Mason async->submit_bio_done = submit_bio_done; 8164a69a410SChris Mason 8174a69a410SChris Mason async->work.func = run_one_async_start; 8184a69a410SChris Mason async->work.ordered_func = run_one_async_done; 8194a69a410SChris Mason async->work.ordered_free = run_one_async_free; 8204a69a410SChris Mason 8218b712842SChris Mason async->work.flags = 0; 822c8b97818SChris Mason async->bio_flags = bio_flags; 823eaf25d93SChris Mason async->bio_offset = bio_offset; 8248c8bee1dSChris Mason 82579787eaaSJeff Mahoney async->error = 0; 82679787eaaSJeff Mahoney 827cb03c743SChris Mason atomic_inc(&fs_info->nr_async_submits); 828d313d7a3SChris Mason 8297b6d91daSChristoph Hellwig if (rw & REQ_SYNC) 830d313d7a3SChris Mason btrfs_set_work_high_prio(&async->work); 831d313d7a3SChris Mason 8328b712842SChris Mason btrfs_queue_worker(&fs_info->workers, &async->work); 8339473f16cSChris Mason 834771ed689SChris Mason while (atomic_read(&fs_info->async_submit_draining) && 835771ed689SChris Mason atomic_read(&fs_info->nr_async_submits)) { 836771ed689SChris Mason wait_event(fs_info->async_submit_wait, 837771ed689SChris Mason (atomic_read(&fs_info->nr_async_submits) == 0)); 838771ed689SChris Mason } 839771ed689SChris Mason 84044b8bd7eSChris Mason return 0; 84144b8bd7eSChris Mason } 84244b8bd7eSChris Mason 843ce3ed71aSChris Mason static int btree_csum_one_bio(struct bio *bio) 844ce3ed71aSChris Mason { 845ce3ed71aSChris Mason struct bio_vec *bvec = bio->bi_io_vec; 846ce3ed71aSChris Mason int bio_index = 0; 847ce3ed71aSChris Mason struct btrfs_root *root; 84879787eaaSJeff Mahoney int ret = 0; 849ce3ed71aSChris Mason 850ce3ed71aSChris Mason WARN_ON(bio->bi_vcnt <= 0); 851ce3ed71aSChris Mason while (bio_index < bio->bi_vcnt) { 852ce3ed71aSChris Mason root = BTRFS_I(bvec->bv_page->mapping->host)->root; 85379787eaaSJeff Mahoney ret = csum_dirty_buffer(root, bvec->bv_page); 85479787eaaSJeff Mahoney if (ret) 85579787eaaSJeff Mahoney break; 856ce3ed71aSChris Mason bio_index++; 857ce3ed71aSChris Mason bvec++; 858ce3ed71aSChris Mason } 85979787eaaSJeff Mahoney return ret; 860ce3ed71aSChris Mason } 861ce3ed71aSChris Mason 8624a69a410SChris Mason static int __btree_submit_bio_start(struct inode *inode, int rw, 8634a69a410SChris Mason struct bio *bio, int mirror_num, 864eaf25d93SChris Mason unsigned long bio_flags, 865eaf25d93SChris Mason u64 bio_offset) 86622c59948SChris Mason { 8678b712842SChris Mason /* 8688b712842SChris Mason * when we're called for a write, we're already in the async 8695443be45SChris Mason * submission context. Just jump into btrfs_map_bio 8708b712842SChris Mason */ 87179787eaaSJeff Mahoney return btree_csum_one_bio(bio); 87222c59948SChris Mason } 87322c59948SChris Mason 8744a69a410SChris Mason static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, 875eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 876eaf25d93SChris Mason u64 bio_offset) 8774a69a410SChris Mason { 87861891923SStefan Behrens int ret; 87961891923SStefan Behrens 8808b712842SChris Mason /* 8814a69a410SChris Mason * when we're called for a write, we're already in the async 8824a69a410SChris Mason * submission context. Just jump into btrfs_map_bio 8838b712842SChris Mason */ 88461891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); 88561891923SStefan Behrens if (ret) 88661891923SStefan Behrens bio_endio(bio, ret); 88761891923SStefan Behrens return ret; 8880b86a832SChris Mason } 8890b86a832SChris Mason 890de0022b9SJosef Bacik static int check_async_write(struct inode *inode, unsigned long bio_flags) 891de0022b9SJosef Bacik { 892de0022b9SJosef Bacik if (bio_flags & EXTENT_BIO_TREE_LOG) 893de0022b9SJosef Bacik return 0; 894de0022b9SJosef Bacik #ifdef CONFIG_X86 895de0022b9SJosef Bacik if (cpu_has_xmm4_2) 896de0022b9SJosef Bacik return 0; 897de0022b9SJosef Bacik #endif 898de0022b9SJosef Bacik return 1; 899de0022b9SJosef Bacik } 900de0022b9SJosef Bacik 90144b8bd7eSChris Mason static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, 902eaf25d93SChris Mason int mirror_num, unsigned long bio_flags, 903eaf25d93SChris Mason u64 bio_offset) 90444b8bd7eSChris Mason { 905de0022b9SJosef Bacik int async = check_async_write(inode, bio_flags); 9064a69a410SChris Mason int ret; 907cad321adSChris Mason 9087b6d91daSChristoph Hellwig if (!(rw & REQ_WRITE)) { 909cad321adSChris Mason /* 910cad321adSChris Mason * called for a read, do the setup so that checksum validation 911cad321adSChris Mason * can happen in the async kernel threads 912cad321adSChris Mason */ 913f3f266abSChris Mason ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, 914f3f266abSChris Mason bio, 1); 9151d4284bdSChris Mason if (ret) 91661891923SStefan Behrens goto out_w_error; 91761891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 9186f3577bdSChris Mason mirror_num, 0); 919de0022b9SJosef Bacik } else if (!async) { 920de0022b9SJosef Bacik ret = btree_csum_one_bio(bio); 921de0022b9SJosef Bacik if (ret) 92261891923SStefan Behrens goto out_w_error; 92361891923SStefan Behrens ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, 924de0022b9SJosef Bacik mirror_num, 0); 92561891923SStefan Behrens } else { 926cad321adSChris Mason /* 92761891923SStefan Behrens * kthread helpers are used to submit writes so that 92861891923SStefan Behrens * checksumming can happen in parallel across all CPUs 929cad321adSChris Mason */ 93061891923SStefan Behrens ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, 931c8b97818SChris Mason inode, rw, bio, mirror_num, 0, 932eaf25d93SChris Mason bio_offset, 9334a69a410SChris Mason __btree_submit_bio_start, 9344a69a410SChris Mason __btree_submit_bio_done); 93544b8bd7eSChris Mason } 93644b8bd7eSChris Mason 93761891923SStefan Behrens if (ret) { 93861891923SStefan Behrens out_w_error: 93961891923SStefan Behrens bio_endio(bio, ret); 94061891923SStefan Behrens } 94161891923SStefan Behrens return ret; 94261891923SStefan Behrens } 94361891923SStefan Behrens 9443dd1462eSJan Beulich #ifdef CONFIG_MIGRATION 945784b4e29SChris Mason static int btree_migratepage(struct address_space *mapping, 946a6bc32b8SMel Gorman struct page *newpage, struct page *page, 947a6bc32b8SMel Gorman enum migrate_mode mode) 948784b4e29SChris Mason { 949784b4e29SChris Mason /* 950784b4e29SChris Mason * we can't safely write a btree page from here, 951784b4e29SChris Mason * we haven't done the locking hook 952784b4e29SChris Mason */ 953784b4e29SChris Mason if (PageDirty(page)) 954784b4e29SChris Mason return -EAGAIN; 955784b4e29SChris Mason /* 956784b4e29SChris Mason * Buffers may be managed in a filesystem specific way. 957784b4e29SChris Mason * We must have no buffers or drop them. 958784b4e29SChris Mason */ 959784b4e29SChris Mason if (page_has_private(page) && 960784b4e29SChris Mason !try_to_release_page(page, GFP_KERNEL)) 961784b4e29SChris Mason return -EAGAIN; 962a6bc32b8SMel Gorman return migrate_page(mapping, newpage, page, mode); 963784b4e29SChris Mason } 9643dd1462eSJan Beulich #endif 965784b4e29SChris Mason 9660da5468fSChris Mason 9670da5468fSChris Mason static int btree_writepages(struct address_space *mapping, 9680da5468fSChris Mason struct writeback_control *wbc) 9690da5468fSChris Mason { 970d1310b2eSChris Mason struct extent_io_tree *tree; 971e2d84521SMiao Xie struct btrfs_fs_info *fs_info; 972e2d84521SMiao Xie int ret; 973e2d84521SMiao Xie 974d1310b2eSChris Mason tree = &BTRFS_I(mapping->host)->io_tree; 975d8d5f3e1SChris Mason if (wbc->sync_mode == WB_SYNC_NONE) { 976448d640bSChris Mason 977448d640bSChris Mason if (wbc->for_kupdate) 978448d640bSChris Mason return 0; 979448d640bSChris Mason 980e2d84521SMiao Xie fs_info = BTRFS_I(mapping->host)->root->fs_info; 981b9473439SChris Mason /* this is a bit racy, but that's ok */ 982e2d84521SMiao Xie ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, 983e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 984e2d84521SMiao Xie if (ret < 0) 985793955bcSChris Mason return 0; 986793955bcSChris Mason } 9870b32f4bbSJosef Bacik return btree_write_cache_pages(mapping, wbc); 9880da5468fSChris Mason } 9890da5468fSChris Mason 990b2950863SChristoph Hellwig static int btree_readpage(struct file *file, struct page *page) 9915f39d397SChris Mason { 992d1310b2eSChris Mason struct extent_io_tree *tree; 993d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 9948ddc7d9cSJan Schmidt return extent_read_full_page(tree, page, btree_get_extent, 0); 9955f39d397SChris Mason } 9965f39d397SChris Mason 99770dec807SChris Mason static int btree_releasepage(struct page *page, gfp_t gfp_flags) 9985f39d397SChris Mason { 99998509cfcSChris Mason if (PageWriteback(page) || PageDirty(page)) 100098509cfcSChris Mason return 0; 10010c4e538bSDavid Sterba /* 10020c4e538bSDavid Sterba * We need to mask out eg. __GFP_HIGHMEM and __GFP_DMA32 as we're doing 10030c4e538bSDavid Sterba * slab allocation from alloc_extent_state down the callchain where 10040c4e538bSDavid Sterba * it'd hit a BUG_ON as those flags are not allowed. 10050c4e538bSDavid Sterba */ 10060c4e538bSDavid Sterba gfp_flags &= ~GFP_SLAB_BUG_MASK; 10070c4e538bSDavid Sterba 10083083ee2eSJosef Bacik return try_release_extent_buffer(page, gfp_flags); 1009d98237b3SChris Mason } 1010d98237b3SChris Mason 10115f39d397SChris Mason static void btree_invalidatepage(struct page *page, unsigned long offset) 1012d98237b3SChris Mason { 1013d1310b2eSChris Mason struct extent_io_tree *tree; 1014d1310b2eSChris Mason tree = &BTRFS_I(page->mapping->host)->io_tree; 10155f39d397SChris Mason extent_invalidatepage(tree, page, offset); 10165f39d397SChris Mason btree_releasepage(page, GFP_NOFS); 10179ad6b7bcSChris Mason if (PagePrivate(page)) { 1018d397712bSChris Mason printk(KERN_WARNING "btrfs warning page private not zero " 1019d397712bSChris Mason "on page %llu\n", (unsigned long long)page_offset(page)); 10209ad6b7bcSChris Mason ClearPagePrivate(page); 10219ad6b7bcSChris Mason set_page_private(page, 0); 10229ad6b7bcSChris Mason page_cache_release(page); 10239ad6b7bcSChris Mason } 1024d98237b3SChris Mason } 1025d98237b3SChris Mason 10260b32f4bbSJosef Bacik static int btree_set_page_dirty(struct page *page) 10270b32f4bbSJosef Bacik { 1028bb146eb2SJosef Bacik #ifdef DEBUG 10290b32f4bbSJosef Bacik struct extent_buffer *eb; 10300b32f4bbSJosef Bacik 10310b32f4bbSJosef Bacik BUG_ON(!PagePrivate(page)); 10320b32f4bbSJosef Bacik eb = (struct extent_buffer *)page->private; 10330b32f4bbSJosef Bacik BUG_ON(!eb); 10340b32f4bbSJosef Bacik BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); 10350b32f4bbSJosef Bacik BUG_ON(!atomic_read(&eb->refs)); 10360b32f4bbSJosef Bacik btrfs_assert_tree_locked(eb); 1037bb146eb2SJosef Bacik #endif 10380b32f4bbSJosef Bacik return __set_page_dirty_nobuffers(page); 10390b32f4bbSJosef Bacik } 10400b32f4bbSJosef Bacik 10417f09410bSAlexey Dobriyan static const struct address_space_operations btree_aops = { 1042d98237b3SChris Mason .readpage = btree_readpage, 10430da5468fSChris Mason .writepages = btree_writepages, 10445f39d397SChris Mason .releasepage = btree_releasepage, 10455f39d397SChris Mason .invalidatepage = btree_invalidatepage, 10465a92bc88SChris Mason #ifdef CONFIG_MIGRATION 1047784b4e29SChris Mason .migratepage = btree_migratepage, 10485a92bc88SChris Mason #endif 10490b32f4bbSJosef Bacik .set_page_dirty = btree_set_page_dirty, 1050d98237b3SChris Mason }; 1051123abc88SChris Mason 1052ca7a79adSChris Mason int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1053ca7a79adSChris Mason u64 parent_transid) 1054090d1875SChris Mason { 10555f39d397SChris Mason struct extent_buffer *buf = NULL; 10565f39d397SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 1057de428b63SChris Mason int ret = 0; 1058090d1875SChris Mason 1059db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 10605f39d397SChris Mason if (!buf) 1061090d1875SChris Mason return 0; 1062d1310b2eSChris Mason read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, 1063bb82ab88SArne Jansen buf, 0, WAIT_NONE, btree_get_extent, 0); 10645f39d397SChris Mason free_extent_buffer(buf); 1065de428b63SChris Mason return ret; 1066090d1875SChris Mason } 1067090d1875SChris Mason 1068ab0fff03SArne Jansen int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, 1069ab0fff03SArne Jansen int mirror_num, struct extent_buffer **eb) 1070ab0fff03SArne Jansen { 1071ab0fff03SArne Jansen struct extent_buffer *buf = NULL; 1072ab0fff03SArne Jansen struct inode *btree_inode = root->fs_info->btree_inode; 1073ab0fff03SArne Jansen struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; 1074ab0fff03SArne Jansen int ret; 1075ab0fff03SArne Jansen 1076ab0fff03SArne Jansen buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 1077ab0fff03SArne Jansen if (!buf) 1078ab0fff03SArne Jansen return 0; 1079ab0fff03SArne Jansen 1080ab0fff03SArne Jansen set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); 1081ab0fff03SArne Jansen 1082ab0fff03SArne Jansen ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, 1083ab0fff03SArne Jansen btree_get_extent, mirror_num); 1084ab0fff03SArne Jansen if (ret) { 1085ab0fff03SArne Jansen free_extent_buffer(buf); 1086ab0fff03SArne Jansen return ret; 1087ab0fff03SArne Jansen } 1088ab0fff03SArne Jansen 1089ab0fff03SArne Jansen if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { 1090ab0fff03SArne Jansen free_extent_buffer(buf); 1091ab0fff03SArne Jansen return -EIO; 10920b32f4bbSJosef Bacik } else if (extent_buffer_uptodate(buf)) { 1093ab0fff03SArne Jansen *eb = buf; 1094ab0fff03SArne Jansen } else { 1095ab0fff03SArne Jansen free_extent_buffer(buf); 1096ab0fff03SArne Jansen } 1097ab0fff03SArne Jansen return 0; 1098ab0fff03SArne Jansen } 1099ab0fff03SArne Jansen 11000999df54SChris Mason struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, 11010999df54SChris Mason u64 bytenr, u32 blocksize) 11020999df54SChris Mason { 11030999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 11040999df54SChris Mason struct extent_buffer *eb; 11050999df54SChris Mason eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1106f09d1f60SDavid Sterba bytenr, blocksize); 11070999df54SChris Mason return eb; 11080999df54SChris Mason } 11090999df54SChris Mason 11100999df54SChris Mason struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, 11110999df54SChris Mason u64 bytenr, u32 blocksize) 11120999df54SChris Mason { 11130999df54SChris Mason struct inode *btree_inode = root->fs_info->btree_inode; 11140999df54SChris Mason struct extent_buffer *eb; 11150999df54SChris Mason 11160999df54SChris Mason eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, 1117727011e0SChris Mason bytenr, blocksize); 11180999df54SChris Mason return eb; 11190999df54SChris Mason } 11200999df54SChris Mason 11210999df54SChris Mason 1122e02119d5SChris Mason int btrfs_write_tree_block(struct extent_buffer *buf) 1123e02119d5SChris Mason { 1124727011e0SChris Mason return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, 11258aa38c31SChristoph Hellwig buf->start + buf->len - 1); 1126e02119d5SChris Mason } 1127e02119d5SChris Mason 1128e02119d5SChris Mason int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) 1129e02119d5SChris Mason { 1130727011e0SChris Mason return filemap_fdatawait_range(buf->pages[0]->mapping, 11318aa38c31SChristoph Hellwig buf->start, buf->start + buf->len - 1); 1132e02119d5SChris Mason } 1133e02119d5SChris Mason 1134db94535dSChris Mason struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 1135ca7a79adSChris Mason u32 blocksize, u64 parent_transid) 1136e20d96d6SChris Mason { 11375f39d397SChris Mason struct extent_buffer *buf = NULL; 113819c00ddcSChris Mason int ret; 113919c00ddcSChris Mason 1140db94535dSChris Mason buf = btrfs_find_create_tree_block(root, bytenr, blocksize); 11415f39d397SChris Mason if (!buf) 1142d98237b3SChris Mason return NULL; 1143e4204dedSChris Mason 1144ca7a79adSChris Mason ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 11455f39d397SChris Mason return buf; 1146ce9adaa5SChris Mason 1147eb60ceacSChris Mason } 1148eb60ceacSChris Mason 1149d5c13f92SJeff Mahoney void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, 11505f39d397SChris Mason struct extent_buffer *buf) 1151ed2ff2cbSChris Mason { 1152e2d84521SMiao Xie struct btrfs_fs_info *fs_info = root->fs_info; 1153e2d84521SMiao Xie 115455c69072SChris Mason if (btrfs_header_generation(buf) == 1155e2d84521SMiao Xie fs_info->running_transaction->transid) { 1156b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 1157b4ce94deSChris Mason 1158b9473439SChris Mason if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { 1159e2d84521SMiao Xie __percpu_counter_add(&fs_info->dirty_metadata_bytes, 1160e2d84521SMiao Xie -buf->len, 1161e2d84521SMiao Xie fs_info->dirty_metadata_batch); 1162b9473439SChris Mason /* ugh, clear_extent_buffer_dirty needs to lock the page */ 1163b9473439SChris Mason btrfs_set_lock_blocking(buf); 11640b32f4bbSJosef Bacik clear_extent_buffer_dirty(buf); 1165925baeddSChris Mason } 11665f39d397SChris Mason } 1167ed7b63ebSJosef Bacik } 11685f39d397SChris Mason 1169143bede5SJeff Mahoney static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, 117087ee04ebSChris Mason u32 stripesize, struct btrfs_root *root, 11719f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 1172e20d96d6SChris Mason u64 objectid) 1173d97e63b6SChris Mason { 1174cfaa7295SChris Mason root->node = NULL; 1175a28ec197SChris Mason root->commit_root = NULL; 1176db94535dSChris Mason root->sectorsize = sectorsize; 1177db94535dSChris Mason root->nodesize = nodesize; 1178db94535dSChris Mason root->leafsize = leafsize; 117987ee04ebSChris Mason root->stripesize = stripesize; 1180123abc88SChris Mason root->ref_cows = 0; 11810b86a832SChris Mason root->track_dirty = 0; 1182c71bf099SYan, Zheng root->in_radix = 0; 1183d68fc57bSYan, Zheng root->orphan_item_inserted = 0; 1184d68fc57bSYan, Zheng root->orphan_cleanup_state = 0; 11850b86a832SChris Mason 11860f7d52f4SChris Mason root->objectid = objectid; 11870f7d52f4SChris Mason root->last_trans = 0; 118813a8a7c8SYan, Zheng root->highest_objectid = 0; 118958176a96SJosef Bacik root->name = NULL; 11906bef4d31SEric Paris root->inode_tree = RB_ROOT; 119116cdcec7SMiao Xie INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); 1192f0486c68SYan, Zheng root->block_rsv = NULL; 1193d68fc57bSYan, Zheng root->orphan_block_rsv = NULL; 11940b86a832SChris Mason 11950b86a832SChris Mason INIT_LIST_HEAD(&root->dirty_list); 11965d4f98a2SYan Zheng INIT_LIST_HEAD(&root->root_list); 11972ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[0]); 11982ab28f32SJosef Bacik INIT_LIST_HEAD(&root->logged_list[1]); 1199d68fc57bSYan, Zheng spin_lock_init(&root->orphan_lock); 12005d4f98a2SYan Zheng spin_lock_init(&root->inode_lock); 1201f0486c68SYan, Zheng spin_lock_init(&root->accounting_lock); 12022ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[0]); 12032ab28f32SJosef Bacik spin_lock_init(&root->log_extents_lock[1]); 1204a2135011SChris Mason mutex_init(&root->objectid_mutex); 1205e02119d5SChris Mason mutex_init(&root->log_mutex); 12067237f183SYan Zheng init_waitqueue_head(&root->log_writer_wait); 12077237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[0]); 12087237f183SYan Zheng init_waitqueue_head(&root->log_commit_wait[1]); 12097237f183SYan Zheng atomic_set(&root->log_commit[0], 0); 12107237f183SYan Zheng atomic_set(&root->log_commit[1], 0); 12117237f183SYan Zheng atomic_set(&root->log_writers, 0); 12122ecb7923SMiao Xie atomic_set(&root->log_batch, 0); 12138a35d95fSJosef Bacik atomic_set(&root->orphan_inodes, 0); 12147237f183SYan Zheng root->log_transid = 0; 1215257c62e1SChris Mason root->last_log_commit = 0; 1216d0c803c4SChris Mason extent_io_tree_init(&root->dirty_log_pages, 1217f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 1218017e5369SChris Mason 12193768f368SChris Mason memset(&root->root_key, 0, sizeof(root->root_key)); 12203768f368SChris Mason memset(&root->root_item, 0, sizeof(root->root_item)); 12216702ed49SChris Mason memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); 122258176a96SJosef Bacik memset(&root->root_kobj, 0, sizeof(root->root_kobj)); 12233f157a2fSChris Mason root->defrag_trans_start = fs_info->generation; 122458176a96SJosef Bacik init_completion(&root->kobj_unregister); 12256702ed49SChris Mason root->defrag_running = 0; 12264d775673SChris Mason root->root_key.objectid = objectid; 12270ee5dc67SAl Viro root->anon_dev = 0; 12288ea05e3aSAlexander Block 12295f3ab90aSAnand Jain spin_lock_init(&root->root_item_lock); 12303768f368SChris Mason } 12313768f368SChris Mason 1232200a5c17SJeff Mahoney static int __must_check find_and_setup_root(struct btrfs_root *tree_root, 12339f5fae2fSChris Mason struct btrfs_fs_info *fs_info, 12349f5fae2fSChris Mason u64 objectid, 1235e20d96d6SChris Mason struct btrfs_root *root) 12363768f368SChris Mason { 12373768f368SChris Mason int ret; 1238db94535dSChris Mason u32 blocksize; 123984234f3aSYan Zheng u64 generation; 12403768f368SChris Mason 1241db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 124287ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 124387ee04ebSChris Mason root, fs_info, objectid); 12443768f368SChris Mason ret = btrfs_find_last_root(tree_root, objectid, 12453768f368SChris Mason &root->root_item, &root->root_key); 12464df27c4dSYan, Zheng if (ret > 0) 12474df27c4dSYan, Zheng return -ENOENT; 1248200a5c17SJeff Mahoney else if (ret < 0) 1249200a5c17SJeff Mahoney return ret; 12503768f368SChris Mason 125184234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1252db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1253af31f5e5SChris Mason root->commit_root = NULL; 1254db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 125584234f3aSYan Zheng blocksize, generation); 1256b9fab919SChris Mason if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { 125768433b73SChris Mason free_extent_buffer(root->node); 1258af31f5e5SChris Mason root->node = NULL; 125968433b73SChris Mason return -EIO; 126068433b73SChris Mason } 12614df27c4dSYan, Zheng root->commit_root = btrfs_root_node(root); 1262d97e63b6SChris Mason return 0; 1263d97e63b6SChris Mason } 1264d97e63b6SChris Mason 1265f84a8bd6SAl Viro static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) 12666f07e42eSAl Viro { 12676f07e42eSAl Viro struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); 12686f07e42eSAl Viro if (root) 12696f07e42eSAl Viro root->fs_info = fs_info; 12706f07e42eSAl Viro return root; 12716f07e42eSAl Viro } 12726f07e42eSAl Viro 127320897f5cSArne Jansen struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, 127420897f5cSArne Jansen struct btrfs_fs_info *fs_info, 127520897f5cSArne Jansen u64 objectid) 127620897f5cSArne Jansen { 127720897f5cSArne Jansen struct extent_buffer *leaf; 127820897f5cSArne Jansen struct btrfs_root *tree_root = fs_info->tree_root; 127920897f5cSArne Jansen struct btrfs_root *root; 128020897f5cSArne Jansen struct btrfs_key key; 128120897f5cSArne Jansen int ret = 0; 128220897f5cSArne Jansen u64 bytenr; 128320897f5cSArne Jansen 128420897f5cSArne Jansen root = btrfs_alloc_root(fs_info); 128520897f5cSArne Jansen if (!root) 128620897f5cSArne Jansen return ERR_PTR(-ENOMEM); 128720897f5cSArne Jansen 128820897f5cSArne Jansen __setup_root(tree_root->nodesize, tree_root->leafsize, 128920897f5cSArne Jansen tree_root->sectorsize, tree_root->stripesize, 129020897f5cSArne Jansen root, fs_info, objectid); 129120897f5cSArne Jansen root->root_key.objectid = objectid; 129220897f5cSArne Jansen root->root_key.type = BTRFS_ROOT_ITEM_KEY; 129320897f5cSArne Jansen root->root_key.offset = 0; 129420897f5cSArne Jansen 129520897f5cSArne Jansen leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 129620897f5cSArne Jansen 0, objectid, NULL, 0, 0, 0); 129720897f5cSArne Jansen if (IS_ERR(leaf)) { 129820897f5cSArne Jansen ret = PTR_ERR(leaf); 12991dd05682STsutomu Itoh leaf = NULL; 130020897f5cSArne Jansen goto fail; 130120897f5cSArne Jansen } 130220897f5cSArne Jansen 130320897f5cSArne Jansen bytenr = leaf->start; 130420897f5cSArne Jansen memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 130520897f5cSArne Jansen btrfs_set_header_bytenr(leaf, leaf->start); 130620897f5cSArne Jansen btrfs_set_header_generation(leaf, trans->transid); 130720897f5cSArne Jansen btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 130820897f5cSArne Jansen btrfs_set_header_owner(leaf, objectid); 130920897f5cSArne Jansen root->node = leaf; 131020897f5cSArne Jansen 131120897f5cSArne Jansen write_extent_buffer(leaf, fs_info->fsid, 131220897f5cSArne Jansen (unsigned long)btrfs_header_fsid(leaf), 131320897f5cSArne Jansen BTRFS_FSID_SIZE); 131420897f5cSArne Jansen write_extent_buffer(leaf, fs_info->chunk_tree_uuid, 131520897f5cSArne Jansen (unsigned long)btrfs_header_chunk_tree_uuid(leaf), 131620897f5cSArne Jansen BTRFS_UUID_SIZE); 131720897f5cSArne Jansen btrfs_mark_buffer_dirty(leaf); 131820897f5cSArne Jansen 131920897f5cSArne Jansen root->commit_root = btrfs_root_node(root); 132020897f5cSArne Jansen root->track_dirty = 1; 132120897f5cSArne Jansen 132220897f5cSArne Jansen 132320897f5cSArne Jansen root->root_item.flags = 0; 132420897f5cSArne Jansen root->root_item.byte_limit = 0; 132520897f5cSArne Jansen btrfs_set_root_bytenr(&root->root_item, leaf->start); 132620897f5cSArne Jansen btrfs_set_root_generation(&root->root_item, trans->transid); 132720897f5cSArne Jansen btrfs_set_root_level(&root->root_item, 0); 132820897f5cSArne Jansen btrfs_set_root_refs(&root->root_item, 1); 132920897f5cSArne Jansen btrfs_set_root_used(&root->root_item, leaf->len); 133020897f5cSArne Jansen btrfs_set_root_last_snapshot(&root->root_item, 0); 133120897f5cSArne Jansen btrfs_set_root_dirid(&root->root_item, 0); 133220897f5cSArne Jansen root->root_item.drop_level = 0; 133320897f5cSArne Jansen 133420897f5cSArne Jansen key.objectid = objectid; 133520897f5cSArne Jansen key.type = BTRFS_ROOT_ITEM_KEY; 133620897f5cSArne Jansen key.offset = 0; 133720897f5cSArne Jansen ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); 133820897f5cSArne Jansen if (ret) 133920897f5cSArne Jansen goto fail; 134020897f5cSArne Jansen 134120897f5cSArne Jansen btrfs_tree_unlock(leaf); 134220897f5cSArne Jansen 134320897f5cSArne Jansen return root; 13441dd05682STsutomu Itoh 13451dd05682STsutomu Itoh fail: 13461dd05682STsutomu Itoh if (leaf) { 13471dd05682STsutomu Itoh btrfs_tree_unlock(leaf); 13481dd05682STsutomu Itoh free_extent_buffer(leaf); 13491dd05682STsutomu Itoh } 13501dd05682STsutomu Itoh kfree(root); 13511dd05682STsutomu Itoh 13521dd05682STsutomu Itoh return ERR_PTR(ret); 135320897f5cSArne Jansen } 135420897f5cSArne Jansen 13557237f183SYan Zheng static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, 1356e02119d5SChris Mason struct btrfs_fs_info *fs_info) 13570f7d52f4SChris Mason { 13580f7d52f4SChris Mason struct btrfs_root *root; 13590f7d52f4SChris Mason struct btrfs_root *tree_root = fs_info->tree_root; 13607237f183SYan Zheng struct extent_buffer *leaf; 1361e02119d5SChris Mason 13626f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 1363e02119d5SChris Mason if (!root) 13647237f183SYan Zheng return ERR_PTR(-ENOMEM); 1365e02119d5SChris Mason 1366e02119d5SChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 1367e02119d5SChris Mason tree_root->sectorsize, tree_root->stripesize, 1368e02119d5SChris Mason root, fs_info, BTRFS_TREE_LOG_OBJECTID); 1369e02119d5SChris Mason 1370e02119d5SChris Mason root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 1371e02119d5SChris Mason root->root_key.type = BTRFS_ROOT_ITEM_KEY; 1372e02119d5SChris Mason root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 13737237f183SYan Zheng /* 13747237f183SYan Zheng * log trees do not get reference counted because they go away 13757237f183SYan Zheng * before a real commit is actually done. They do store pointers 13767237f183SYan Zheng * to file data extents, and those reference counts still get 13777237f183SYan Zheng * updated (along with back refs to the log tree). 13787237f183SYan Zheng */ 1379e02119d5SChris Mason root->ref_cows = 0; 1380e02119d5SChris Mason 13815d4f98a2SYan Zheng leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 138266d7e7f0SArne Jansen BTRFS_TREE_LOG_OBJECTID, NULL, 13835581a51aSJan Schmidt 0, 0, 0); 13847237f183SYan Zheng if (IS_ERR(leaf)) { 13857237f183SYan Zheng kfree(root); 13867237f183SYan Zheng return ERR_CAST(leaf); 13877237f183SYan Zheng } 1388e02119d5SChris Mason 13895d4f98a2SYan Zheng memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); 13905d4f98a2SYan Zheng btrfs_set_header_bytenr(leaf, leaf->start); 13915d4f98a2SYan Zheng btrfs_set_header_generation(leaf, trans->transid); 13925d4f98a2SYan Zheng btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); 13935d4f98a2SYan Zheng btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); 13947237f183SYan Zheng root->node = leaf; 1395e02119d5SChris Mason 1396e02119d5SChris Mason write_extent_buffer(root->node, root->fs_info->fsid, 1397e02119d5SChris Mason (unsigned long)btrfs_header_fsid(root->node), 1398e02119d5SChris Mason BTRFS_FSID_SIZE); 1399e02119d5SChris Mason btrfs_mark_buffer_dirty(root->node); 1400e02119d5SChris Mason btrfs_tree_unlock(root->node); 14017237f183SYan Zheng return root; 14027237f183SYan Zheng } 14037237f183SYan Zheng 14047237f183SYan Zheng int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 14057237f183SYan Zheng struct btrfs_fs_info *fs_info) 14067237f183SYan Zheng { 14077237f183SYan Zheng struct btrfs_root *log_root; 14087237f183SYan Zheng 14097237f183SYan Zheng log_root = alloc_log_tree(trans, fs_info); 14107237f183SYan Zheng if (IS_ERR(log_root)) 14117237f183SYan Zheng return PTR_ERR(log_root); 14127237f183SYan Zheng WARN_ON(fs_info->log_root_tree); 14137237f183SYan Zheng fs_info->log_root_tree = log_root; 14147237f183SYan Zheng return 0; 14157237f183SYan Zheng } 14167237f183SYan Zheng 14177237f183SYan Zheng int btrfs_add_log_tree(struct btrfs_trans_handle *trans, 14187237f183SYan Zheng struct btrfs_root *root) 14197237f183SYan Zheng { 14207237f183SYan Zheng struct btrfs_root *log_root; 14217237f183SYan Zheng struct btrfs_inode_item *inode_item; 14227237f183SYan Zheng 14237237f183SYan Zheng log_root = alloc_log_tree(trans, root->fs_info); 14247237f183SYan Zheng if (IS_ERR(log_root)) 14257237f183SYan Zheng return PTR_ERR(log_root); 14267237f183SYan Zheng 14277237f183SYan Zheng log_root->last_trans = trans->transid; 14287237f183SYan Zheng log_root->root_key.offset = root->root_key.objectid; 14297237f183SYan Zheng 14307237f183SYan Zheng inode_item = &log_root->root_item.inode; 14317237f183SYan Zheng inode_item->generation = cpu_to_le64(1); 14327237f183SYan Zheng inode_item->size = cpu_to_le64(3); 14337237f183SYan Zheng inode_item->nlink = cpu_to_le32(1); 14347237f183SYan Zheng inode_item->nbytes = cpu_to_le64(root->leafsize); 14357237f183SYan Zheng inode_item->mode = cpu_to_le32(S_IFDIR | 0755); 14367237f183SYan Zheng 14375d4f98a2SYan Zheng btrfs_set_root_node(&log_root->root_item, log_root->node); 14387237f183SYan Zheng 14397237f183SYan Zheng WARN_ON(root->log_root); 14407237f183SYan Zheng root->log_root = log_root; 14417237f183SYan Zheng root->log_transid = 0; 1442257c62e1SChris Mason root->last_log_commit = 0; 1443e02119d5SChris Mason return 0; 1444e02119d5SChris Mason } 1445e02119d5SChris Mason 1446e02119d5SChris Mason struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, 1447e02119d5SChris Mason struct btrfs_key *location) 1448e02119d5SChris Mason { 1449e02119d5SChris Mason struct btrfs_root *root; 1450e02119d5SChris Mason struct btrfs_fs_info *fs_info = tree_root->fs_info; 14510f7d52f4SChris Mason struct btrfs_path *path; 14525f39d397SChris Mason struct extent_buffer *l; 145384234f3aSYan Zheng u64 generation; 1454db94535dSChris Mason u32 blocksize; 14550f7d52f4SChris Mason int ret = 0; 14568ea05e3aSAlexander Block int slot; 14570f7d52f4SChris Mason 14586f07e42eSAl Viro root = btrfs_alloc_root(fs_info); 14590cf6c620SChris Mason if (!root) 14600f7d52f4SChris Mason return ERR_PTR(-ENOMEM); 14610f7d52f4SChris Mason if (location->offset == (u64)-1) { 1462db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 14630f7d52f4SChris Mason location->objectid, root); 14640f7d52f4SChris Mason if (ret) { 14650f7d52f4SChris Mason kfree(root); 14660f7d52f4SChris Mason return ERR_PTR(ret); 14670f7d52f4SChris Mason } 146813a8a7c8SYan, Zheng goto out; 14690f7d52f4SChris Mason } 14700f7d52f4SChris Mason 1471db94535dSChris Mason __setup_root(tree_root->nodesize, tree_root->leafsize, 147287ee04ebSChris Mason tree_root->sectorsize, tree_root->stripesize, 147387ee04ebSChris Mason root, fs_info, location->objectid); 14740f7d52f4SChris Mason 14750f7d52f4SChris Mason path = btrfs_alloc_path(); 1476db5b493aSTsutomu Itoh if (!path) { 1477db5b493aSTsutomu Itoh kfree(root); 1478db5b493aSTsutomu Itoh return ERR_PTR(-ENOMEM); 1479db5b493aSTsutomu Itoh } 14800f7d52f4SChris Mason ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); 148113a8a7c8SYan, Zheng if (ret == 0) { 14825f39d397SChris Mason l = path->nodes[0]; 14838ea05e3aSAlexander Block slot = path->slots[0]; 14848ea05e3aSAlexander Block btrfs_read_root_item(tree_root, l, slot, &root->root_item); 148544b36eb2SYan Zheng memcpy(&root->root_key, location, sizeof(*location)); 148613a8a7c8SYan, Zheng } 14870f7d52f4SChris Mason btrfs_free_path(path); 14880f7d52f4SChris Mason if (ret) { 14895e540f77STsutomu Itoh kfree(root); 149013a8a7c8SYan, Zheng if (ret > 0) 149113a8a7c8SYan, Zheng ret = -ENOENT; 14920f7d52f4SChris Mason return ERR_PTR(ret); 14930f7d52f4SChris Mason } 149413a8a7c8SYan, Zheng 149584234f3aSYan Zheng generation = btrfs_root_generation(&root->root_item); 1496db94535dSChris Mason blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); 1497db94535dSChris Mason root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), 149884234f3aSYan Zheng blocksize, generation); 1499416bc658SJosef Bacik if (!root->node || !extent_buffer_uptodate(root->node)) { 1500416bc658SJosef Bacik ret = (!root->node) ? -ENOMEM : -EIO; 1501416bc658SJosef Bacik 1502416bc658SJosef Bacik free_extent_buffer(root->node); 1503416bc658SJosef Bacik kfree(root); 1504416bc658SJosef Bacik return ERR_PTR(ret); 1505416bc658SJosef Bacik } 1506416bc658SJosef Bacik 15075d4f98a2SYan Zheng root->commit_root = btrfs_root_node(root); 150879787eaaSJeff Mahoney BUG_ON(!root->node); /* -ENOMEM */ 150913a8a7c8SYan, Zheng out: 151008fe4db1SLi Zefan if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { 15110f7d52f4SChris Mason root->ref_cows = 1; 151208fe4db1SLi Zefan btrfs_check_and_init_root_item(&root->root_item); 151308fe4db1SLi Zefan } 151413a8a7c8SYan, Zheng 15155eda7b5eSChris Mason return root; 15165eda7b5eSChris Mason } 15175eda7b5eSChris Mason 1518edbd8d4eSChris Mason struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, 1519edbd8d4eSChris Mason struct btrfs_key *location) 15205eda7b5eSChris Mason { 15215eda7b5eSChris Mason struct btrfs_root *root; 15225eda7b5eSChris Mason int ret; 15235eda7b5eSChris Mason 1524edbd8d4eSChris Mason if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) 1525edbd8d4eSChris Mason return fs_info->tree_root; 1526edbd8d4eSChris Mason if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) 1527edbd8d4eSChris Mason return fs_info->extent_root; 15288f18cf13SChris Mason if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) 15298f18cf13SChris Mason return fs_info->chunk_root; 15308f18cf13SChris Mason if (location->objectid == BTRFS_DEV_TREE_OBJECTID) 15318f18cf13SChris Mason return fs_info->dev_root; 15320403e47eSYan Zheng if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) 15330403e47eSYan Zheng return fs_info->csum_root; 1534bcef60f2SArne Jansen if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) 1535bcef60f2SArne Jansen return fs_info->quota_root ? fs_info->quota_root : 1536bcef60f2SArne Jansen ERR_PTR(-ENOENT); 15374df27c4dSYan, Zheng again: 15384df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15395eda7b5eSChris Mason root = radix_tree_lookup(&fs_info->fs_roots_radix, 15405eda7b5eSChris Mason (unsigned long)location->objectid); 15414df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15425eda7b5eSChris Mason if (root) 15435eda7b5eSChris Mason return root; 15445eda7b5eSChris Mason 1545e02119d5SChris Mason root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); 15465eda7b5eSChris Mason if (IS_ERR(root)) 15475eda7b5eSChris Mason return root; 15483394e160SChris Mason 1549581bb050SLi Zefan root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); 1550581bb050SLi Zefan root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), 1551581bb050SLi Zefan GFP_NOFS); 155235a30d7cSDavid Sterba if (!root->free_ino_pinned || !root->free_ino_ctl) { 155335a30d7cSDavid Sterba ret = -ENOMEM; 1554581bb050SLi Zefan goto fail; 155535a30d7cSDavid Sterba } 1556581bb050SLi Zefan 1557581bb050SLi Zefan btrfs_init_free_ino_ctl(root); 1558581bb050SLi Zefan mutex_init(&root->fs_commit_mutex); 1559581bb050SLi Zefan spin_lock_init(&root->cache_lock); 1560581bb050SLi Zefan init_waitqueue_head(&root->cache_wait); 1561581bb050SLi Zefan 15620ee5dc67SAl Viro ret = get_anon_bdev(&root->anon_dev); 1563ac08aedfSChris Mason if (ret) 1564ac08aedfSChris Mason goto fail; 15653394e160SChris Mason 1566d68fc57bSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) { 1567d68fc57bSYan, Zheng ret = -ENOENT; 1568d68fc57bSYan, Zheng goto fail; 1569d68fc57bSYan, Zheng } 1570d68fc57bSYan, Zheng 1571d68fc57bSYan, Zheng ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); 1572d68fc57bSYan, Zheng if (ret < 0) 1573d68fc57bSYan, Zheng goto fail; 1574d68fc57bSYan, Zheng if (ret == 0) 1575d68fc57bSYan, Zheng root->orphan_item_inserted = 1; 1576d68fc57bSYan, Zheng 15774df27c4dSYan, Zheng ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); 15784df27c4dSYan, Zheng if (ret) 15794df27c4dSYan, Zheng goto fail; 15804df27c4dSYan, Zheng 15814df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 15822619ba1fSChris Mason ret = radix_tree_insert(&fs_info->fs_roots_radix, 15832619ba1fSChris Mason (unsigned long)root->root_key.objectid, 15840f7d52f4SChris Mason root); 1585d68fc57bSYan, Zheng if (ret == 0) 15864df27c4dSYan, Zheng root->in_radix = 1; 1587d68fc57bSYan, Zheng 15884df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 15894df27c4dSYan, Zheng radix_tree_preload_end(); 15900f7d52f4SChris Mason if (ret) { 15914df27c4dSYan, Zheng if (ret == -EEXIST) { 15924df27c4dSYan, Zheng free_fs_root(root); 15934df27c4dSYan, Zheng goto again; 15940f7d52f4SChris Mason } 15954df27c4dSYan, Zheng goto fail; 15964df27c4dSYan, Zheng } 15974df27c4dSYan, Zheng 1598edbd8d4eSChris Mason ret = btrfs_find_dead_roots(fs_info->tree_root, 15995d4f98a2SYan Zheng root->root_key.objectid); 16004df27c4dSYan, Zheng WARN_ON(ret); 1601edbd8d4eSChris Mason return root; 16024df27c4dSYan, Zheng fail: 16034df27c4dSYan, Zheng free_fs_root(root); 16044df27c4dSYan, Zheng return ERR_PTR(ret); 1605edbd8d4eSChris Mason } 1606edbd8d4eSChris Mason 160704160088SChris Mason static int btrfs_congested_fn(void *congested_data, int bdi_bits) 160804160088SChris Mason { 160904160088SChris Mason struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 161004160088SChris Mason int ret = 0; 161104160088SChris Mason struct btrfs_device *device; 161204160088SChris Mason struct backing_dev_info *bdi; 1613b7967db7SChris Mason 16141f78160cSXiao Guangrong rcu_read_lock(); 16151f78160cSXiao Guangrong list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { 1616dfe25020SChris Mason if (!device->bdev) 1617dfe25020SChris Mason continue; 161804160088SChris Mason bdi = blk_get_backing_dev_info(device->bdev); 161904160088SChris Mason if (bdi && bdi_congested(bdi, bdi_bits)) { 162004160088SChris Mason ret = 1; 162104160088SChris Mason break; 162204160088SChris Mason } 162304160088SChris Mason } 16241f78160cSXiao Guangrong rcu_read_unlock(); 162504160088SChris Mason return ret; 162604160088SChris Mason } 162704160088SChris Mason 162838b66988SChris Mason /* 1629ad081f14SJens Axboe * If this fails, caller must call bdi_destroy() to get rid of the 1630ad081f14SJens Axboe * bdi again. 1631ad081f14SJens Axboe */ 163204160088SChris Mason static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 163304160088SChris Mason { 1634ad081f14SJens Axboe int err; 1635ad081f14SJens Axboe 1636ad081f14SJens Axboe bdi->capabilities = BDI_CAP_MAP_COPY; 1637e6d086d8SJens Axboe err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); 1638ad081f14SJens Axboe if (err) 1639ad081f14SJens Axboe return err; 1640ad081f14SJens Axboe 16414575c9ccSChris Mason bdi->ra_pages = default_backing_dev_info.ra_pages; 164204160088SChris Mason bdi->congested_fn = btrfs_congested_fn; 164304160088SChris Mason bdi->congested_data = info; 164404160088SChris Mason return 0; 164504160088SChris Mason } 164604160088SChris Mason 16478b712842SChris Mason /* 16488b712842SChris Mason * called by the kthread helper functions to finally call the bio end_io 16498b712842SChris Mason * functions. This is where read checksum verification actually happens 16508b712842SChris Mason */ 16518b712842SChris Mason static void end_workqueue_fn(struct btrfs_work *work) 1652ce9adaa5SChris Mason { 1653ce9adaa5SChris Mason struct bio *bio; 16548b712842SChris Mason struct end_io_wq *end_io_wq; 16558b712842SChris Mason struct btrfs_fs_info *fs_info; 1656ce9adaa5SChris Mason int error; 1657ce9adaa5SChris Mason 16588b712842SChris Mason end_io_wq = container_of(work, struct end_io_wq, work); 1659ce9adaa5SChris Mason bio = end_io_wq->bio; 16608b712842SChris Mason fs_info = end_io_wq->info; 16618b712842SChris Mason 1662ce9adaa5SChris Mason error = end_io_wq->error; 1663ce9adaa5SChris Mason bio->bi_private = end_io_wq->private; 1664ce9adaa5SChris Mason bio->bi_end_io = end_io_wq->end_io; 1665ce9adaa5SChris Mason kfree(end_io_wq); 1666ce9adaa5SChris Mason bio_endio(bio, error); 1667ce9adaa5SChris Mason } 166844b8bd7eSChris Mason 1669a74a4b97SChris Mason static int cleaner_kthread(void *arg) 1670a74a4b97SChris Mason { 1671a74a4b97SChris Mason struct btrfs_root *root = arg; 1672a74a4b97SChris Mason 1673a74a4b97SChris Mason do { 16749d1a2a3aSDavid Sterba int again = 0; 16759d1a2a3aSDavid Sterba 167676dda93cSYan, Zheng if (!(root->fs_info->sb->s_flags & MS_RDONLY) && 16779d1a2a3aSDavid Sterba down_read_trylock(&root->fs_info->sb->s_umount)) { 16789d1a2a3aSDavid Sterba if (mutex_trylock(&root->fs_info->cleaner_mutex)) { 167924bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 16809d1a2a3aSDavid Sterba again = btrfs_clean_one_deleted_snapshot(root); 1681a74a4b97SChris Mason mutex_unlock(&root->fs_info->cleaner_mutex); 16829d1a2a3aSDavid Sterba } 16834cb5300bSChris Mason btrfs_run_defrag_inodes(root->fs_info); 16849d1a2a3aSDavid Sterba up_read(&root->fs_info->sb->s_umount); 168576dda93cSYan, Zheng } 1686a74a4b97SChris Mason 16879d1a2a3aSDavid Sterba if (!try_to_freeze() && !again) { 1688a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 16898929ecfaSYan, Zheng if (!kthread_should_stop()) 1690a74a4b97SChris Mason schedule(); 1691a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1692a74a4b97SChris Mason } 1693a74a4b97SChris Mason } while (!kthread_should_stop()); 1694a74a4b97SChris Mason return 0; 1695a74a4b97SChris Mason } 1696a74a4b97SChris Mason 1697a74a4b97SChris Mason static int transaction_kthread(void *arg) 1698a74a4b97SChris Mason { 1699a74a4b97SChris Mason struct btrfs_root *root = arg; 1700a74a4b97SChris Mason struct btrfs_trans_handle *trans; 1701a74a4b97SChris Mason struct btrfs_transaction *cur; 17028929ecfaSYan, Zheng u64 transid; 1703a74a4b97SChris Mason unsigned long now; 1704a74a4b97SChris Mason unsigned long delay; 1705914b2007SJan Kara bool cannot_commit; 1706a74a4b97SChris Mason 1707a74a4b97SChris Mason do { 1708914b2007SJan Kara cannot_commit = false; 1709a74a4b97SChris Mason delay = HZ * 30; 1710a74a4b97SChris Mason mutex_lock(&root->fs_info->transaction_kthread_mutex); 1711a74a4b97SChris Mason 1712a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 1713a74a4b97SChris Mason cur = root->fs_info->running_transaction; 1714a74a4b97SChris Mason if (!cur) { 1715a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1716a74a4b97SChris Mason goto sleep; 1717a74a4b97SChris Mason } 171831153d81SYan Zheng 1719a74a4b97SChris Mason now = get_seconds(); 17208929ecfaSYan, Zheng if (!cur->blocked && 17218929ecfaSYan, Zheng (now < cur->start_time || now - cur->start_time < 30)) { 1722a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 1723a74a4b97SChris Mason delay = HZ * 5; 1724a74a4b97SChris Mason goto sleep; 1725a74a4b97SChris Mason } 17268929ecfaSYan, Zheng transid = cur->transid; 1727a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 172856bec294SChris Mason 172979787eaaSJeff Mahoney /* If the file system is aborted, this will always fail. */ 1730354aa0fbSMiao Xie trans = btrfs_attach_transaction(root); 1731914b2007SJan Kara if (IS_ERR(trans)) { 1732354aa0fbSMiao Xie if (PTR_ERR(trans) != -ENOENT) 1733914b2007SJan Kara cannot_commit = true; 173479787eaaSJeff Mahoney goto sleep; 1735914b2007SJan Kara } 17368929ecfaSYan, Zheng if (transid == trans->transid) { 173779787eaaSJeff Mahoney btrfs_commit_transaction(trans, root); 17388929ecfaSYan, Zheng } else { 17398929ecfaSYan, Zheng btrfs_end_transaction(trans, root); 17408929ecfaSYan, Zheng } 1741a74a4b97SChris Mason sleep: 1742a74a4b97SChris Mason wake_up_process(root->fs_info->cleaner_kthread); 1743a74a4b97SChris Mason mutex_unlock(&root->fs_info->transaction_kthread_mutex); 1744a74a4b97SChris Mason 1745a0acae0eSTejun Heo if (!try_to_freeze()) { 1746a74a4b97SChris Mason set_current_state(TASK_INTERRUPTIBLE); 17478929ecfaSYan, Zheng if (!kthread_should_stop() && 1748914b2007SJan Kara (!btrfs_transaction_blocked(root->fs_info) || 1749914b2007SJan Kara cannot_commit)) 1750a74a4b97SChris Mason schedule_timeout(delay); 1751a74a4b97SChris Mason __set_current_state(TASK_RUNNING); 1752a74a4b97SChris Mason } 1753a74a4b97SChris Mason } while (!kthread_should_stop()); 1754a74a4b97SChris Mason return 0; 1755a74a4b97SChris Mason } 1756a74a4b97SChris Mason 1757af31f5e5SChris Mason /* 1758af31f5e5SChris Mason * this will find the highest generation in the array of 1759af31f5e5SChris Mason * root backups. The index of the highest array is returned, 1760af31f5e5SChris Mason * or -1 if we can't find anything. 1761af31f5e5SChris Mason * 1762af31f5e5SChris Mason * We check to make sure the array is valid by comparing the 1763af31f5e5SChris Mason * generation of the latest root in the array with the generation 1764af31f5e5SChris Mason * in the super block. If they don't match we pitch it. 1765af31f5e5SChris Mason */ 1766af31f5e5SChris Mason static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) 1767af31f5e5SChris Mason { 1768af31f5e5SChris Mason u64 cur; 1769af31f5e5SChris Mason int newest_index = -1; 1770af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1771af31f5e5SChris Mason int i; 1772af31f5e5SChris Mason 1773af31f5e5SChris Mason for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { 1774af31f5e5SChris Mason root_backup = info->super_copy->super_roots + i; 1775af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1776af31f5e5SChris Mason if (cur == newest_gen) 1777af31f5e5SChris Mason newest_index = i; 1778af31f5e5SChris Mason } 1779af31f5e5SChris Mason 1780af31f5e5SChris Mason /* check to see if we actually wrapped around */ 1781af31f5e5SChris Mason if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { 1782af31f5e5SChris Mason root_backup = info->super_copy->super_roots; 1783af31f5e5SChris Mason cur = btrfs_backup_tree_root_gen(root_backup); 1784af31f5e5SChris Mason if (cur == newest_gen) 1785af31f5e5SChris Mason newest_index = 0; 1786af31f5e5SChris Mason } 1787af31f5e5SChris Mason return newest_index; 1788af31f5e5SChris Mason } 1789af31f5e5SChris Mason 1790af31f5e5SChris Mason 1791af31f5e5SChris Mason /* 1792af31f5e5SChris Mason * find the oldest backup so we know where to store new entries 1793af31f5e5SChris Mason * in the backup array. This will set the backup_root_index 1794af31f5e5SChris Mason * field in the fs_info struct 1795af31f5e5SChris Mason */ 1796af31f5e5SChris Mason static void find_oldest_super_backup(struct btrfs_fs_info *info, 1797af31f5e5SChris Mason u64 newest_gen) 1798af31f5e5SChris Mason { 1799af31f5e5SChris Mason int newest_index = -1; 1800af31f5e5SChris Mason 1801af31f5e5SChris Mason newest_index = find_newest_super_backup(info, newest_gen); 1802af31f5e5SChris Mason /* if there was garbage in there, just move along */ 1803af31f5e5SChris Mason if (newest_index == -1) { 1804af31f5e5SChris Mason info->backup_root_index = 0; 1805af31f5e5SChris Mason } else { 1806af31f5e5SChris Mason info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; 1807af31f5e5SChris Mason } 1808af31f5e5SChris Mason } 1809af31f5e5SChris Mason 1810af31f5e5SChris Mason /* 1811af31f5e5SChris Mason * copy all the root pointers into the super backup array. 1812af31f5e5SChris Mason * this will bump the backup pointer by one when it is 1813af31f5e5SChris Mason * done 1814af31f5e5SChris Mason */ 1815af31f5e5SChris Mason static void backup_super_roots(struct btrfs_fs_info *info) 1816af31f5e5SChris Mason { 1817af31f5e5SChris Mason int next_backup; 1818af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1819af31f5e5SChris Mason int last_backup; 1820af31f5e5SChris Mason 1821af31f5e5SChris Mason next_backup = info->backup_root_index; 1822af31f5e5SChris Mason last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % 1823af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1824af31f5e5SChris Mason 1825af31f5e5SChris Mason /* 1826af31f5e5SChris Mason * just overwrite the last backup if we're at the same generation 1827af31f5e5SChris Mason * this happens only at umount 1828af31f5e5SChris Mason */ 1829af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + last_backup; 1830af31f5e5SChris Mason if (btrfs_backup_tree_root_gen(root_backup) == 1831af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)) 1832af31f5e5SChris Mason next_backup = last_backup; 1833af31f5e5SChris Mason 1834af31f5e5SChris Mason root_backup = info->super_for_commit->super_roots + next_backup; 1835af31f5e5SChris Mason 1836af31f5e5SChris Mason /* 1837af31f5e5SChris Mason * make sure all of our padding and empty slots get zero filled 1838af31f5e5SChris Mason * regardless of which ones we use today 1839af31f5e5SChris Mason */ 1840af31f5e5SChris Mason memset(root_backup, 0, sizeof(*root_backup)); 1841af31f5e5SChris Mason 1842af31f5e5SChris Mason info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; 1843af31f5e5SChris Mason 1844af31f5e5SChris Mason btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); 1845af31f5e5SChris Mason btrfs_set_backup_tree_root_gen(root_backup, 1846af31f5e5SChris Mason btrfs_header_generation(info->tree_root->node)); 1847af31f5e5SChris Mason 1848af31f5e5SChris Mason btrfs_set_backup_tree_root_level(root_backup, 1849af31f5e5SChris Mason btrfs_header_level(info->tree_root->node)); 1850af31f5e5SChris Mason 1851af31f5e5SChris Mason btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); 1852af31f5e5SChris Mason btrfs_set_backup_chunk_root_gen(root_backup, 1853af31f5e5SChris Mason btrfs_header_generation(info->chunk_root->node)); 1854af31f5e5SChris Mason btrfs_set_backup_chunk_root_level(root_backup, 1855af31f5e5SChris Mason btrfs_header_level(info->chunk_root->node)); 1856af31f5e5SChris Mason 1857af31f5e5SChris Mason btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); 1858af31f5e5SChris Mason btrfs_set_backup_extent_root_gen(root_backup, 1859af31f5e5SChris Mason btrfs_header_generation(info->extent_root->node)); 1860af31f5e5SChris Mason btrfs_set_backup_extent_root_level(root_backup, 1861af31f5e5SChris Mason btrfs_header_level(info->extent_root->node)); 1862af31f5e5SChris Mason 18637c7e82a7SChris Mason /* 18647c7e82a7SChris Mason * we might commit during log recovery, which happens before we set 18657c7e82a7SChris Mason * the fs_root. Make sure it is valid before we fill it in. 18667c7e82a7SChris Mason */ 18677c7e82a7SChris Mason if (info->fs_root && info->fs_root->node) { 18687c7e82a7SChris Mason btrfs_set_backup_fs_root(root_backup, 18697c7e82a7SChris Mason info->fs_root->node->start); 1870af31f5e5SChris Mason btrfs_set_backup_fs_root_gen(root_backup, 1871af31f5e5SChris Mason btrfs_header_generation(info->fs_root->node)); 1872af31f5e5SChris Mason btrfs_set_backup_fs_root_level(root_backup, 1873af31f5e5SChris Mason btrfs_header_level(info->fs_root->node)); 18747c7e82a7SChris Mason } 1875af31f5e5SChris Mason 1876af31f5e5SChris Mason btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); 1877af31f5e5SChris Mason btrfs_set_backup_dev_root_gen(root_backup, 1878af31f5e5SChris Mason btrfs_header_generation(info->dev_root->node)); 1879af31f5e5SChris Mason btrfs_set_backup_dev_root_level(root_backup, 1880af31f5e5SChris Mason btrfs_header_level(info->dev_root->node)); 1881af31f5e5SChris Mason 1882af31f5e5SChris Mason btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); 1883af31f5e5SChris Mason btrfs_set_backup_csum_root_gen(root_backup, 1884af31f5e5SChris Mason btrfs_header_generation(info->csum_root->node)); 1885af31f5e5SChris Mason btrfs_set_backup_csum_root_level(root_backup, 1886af31f5e5SChris Mason btrfs_header_level(info->csum_root->node)); 1887af31f5e5SChris Mason 1888af31f5e5SChris Mason btrfs_set_backup_total_bytes(root_backup, 1889af31f5e5SChris Mason btrfs_super_total_bytes(info->super_copy)); 1890af31f5e5SChris Mason btrfs_set_backup_bytes_used(root_backup, 1891af31f5e5SChris Mason btrfs_super_bytes_used(info->super_copy)); 1892af31f5e5SChris Mason btrfs_set_backup_num_devices(root_backup, 1893af31f5e5SChris Mason btrfs_super_num_devices(info->super_copy)); 1894af31f5e5SChris Mason 1895af31f5e5SChris Mason /* 1896af31f5e5SChris Mason * if we don't copy this out to the super_copy, it won't get remembered 1897af31f5e5SChris Mason * for the next commit 1898af31f5e5SChris Mason */ 1899af31f5e5SChris Mason memcpy(&info->super_copy->super_roots, 1900af31f5e5SChris Mason &info->super_for_commit->super_roots, 1901af31f5e5SChris Mason sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); 1902af31f5e5SChris Mason } 1903af31f5e5SChris Mason 1904af31f5e5SChris Mason /* 1905af31f5e5SChris Mason * this copies info out of the root backup array and back into 1906af31f5e5SChris Mason * the in-memory super block. It is meant to help iterate through 1907af31f5e5SChris Mason * the array, so you send it the number of backups you've already 1908af31f5e5SChris Mason * tried and the last backup index you used. 1909af31f5e5SChris Mason * 1910af31f5e5SChris Mason * this returns -1 when it has tried all the backups 1911af31f5e5SChris Mason */ 1912af31f5e5SChris Mason static noinline int next_root_backup(struct btrfs_fs_info *info, 1913af31f5e5SChris Mason struct btrfs_super_block *super, 1914af31f5e5SChris Mason int *num_backups_tried, int *backup_index) 1915af31f5e5SChris Mason { 1916af31f5e5SChris Mason struct btrfs_root_backup *root_backup; 1917af31f5e5SChris Mason int newest = *backup_index; 1918af31f5e5SChris Mason 1919af31f5e5SChris Mason if (*num_backups_tried == 0) { 1920af31f5e5SChris Mason u64 gen = btrfs_super_generation(super); 1921af31f5e5SChris Mason 1922af31f5e5SChris Mason newest = find_newest_super_backup(info, gen); 1923af31f5e5SChris Mason if (newest == -1) 1924af31f5e5SChris Mason return -1; 1925af31f5e5SChris Mason 1926af31f5e5SChris Mason *backup_index = newest; 1927af31f5e5SChris Mason *num_backups_tried = 1; 1928af31f5e5SChris Mason } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { 1929af31f5e5SChris Mason /* we've tried all the backups, all done */ 1930af31f5e5SChris Mason return -1; 1931af31f5e5SChris Mason } else { 1932af31f5e5SChris Mason /* jump to the next oldest backup */ 1933af31f5e5SChris Mason newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % 1934af31f5e5SChris Mason BTRFS_NUM_BACKUP_ROOTS; 1935af31f5e5SChris Mason *backup_index = newest; 1936af31f5e5SChris Mason *num_backups_tried += 1; 1937af31f5e5SChris Mason } 1938af31f5e5SChris Mason root_backup = super->super_roots + newest; 1939af31f5e5SChris Mason 1940af31f5e5SChris Mason btrfs_set_super_generation(super, 1941af31f5e5SChris Mason btrfs_backup_tree_root_gen(root_backup)); 1942af31f5e5SChris Mason btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); 1943af31f5e5SChris Mason btrfs_set_super_root_level(super, 1944af31f5e5SChris Mason btrfs_backup_tree_root_level(root_backup)); 1945af31f5e5SChris Mason btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); 1946af31f5e5SChris Mason 1947af31f5e5SChris Mason /* 1948af31f5e5SChris Mason * fixme: the total bytes and num_devices need to match or we should 1949af31f5e5SChris Mason * need a fsck 1950af31f5e5SChris Mason */ 1951af31f5e5SChris Mason btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); 1952af31f5e5SChris Mason btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); 1953af31f5e5SChris Mason return 0; 1954af31f5e5SChris Mason } 1955af31f5e5SChris Mason 19567abadb64SLiu Bo /* helper to cleanup workers */ 19577abadb64SLiu Bo static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) 19587abadb64SLiu Bo { 19597abadb64SLiu Bo btrfs_stop_workers(&fs_info->generic_worker); 19607abadb64SLiu Bo btrfs_stop_workers(&fs_info->fixup_workers); 19617abadb64SLiu Bo btrfs_stop_workers(&fs_info->delalloc_workers); 19627abadb64SLiu Bo btrfs_stop_workers(&fs_info->workers); 19637abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_workers); 19647abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_meta_workers); 19657abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_raid56_workers); 19667abadb64SLiu Bo btrfs_stop_workers(&fs_info->rmw_workers); 19677abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_meta_write_workers); 19687abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_write_workers); 19697abadb64SLiu Bo btrfs_stop_workers(&fs_info->endio_freespace_worker); 19707abadb64SLiu Bo btrfs_stop_workers(&fs_info->submit_workers); 19717abadb64SLiu Bo btrfs_stop_workers(&fs_info->delayed_workers); 19727abadb64SLiu Bo btrfs_stop_workers(&fs_info->caching_workers); 19737abadb64SLiu Bo btrfs_stop_workers(&fs_info->readahead_workers); 19747abadb64SLiu Bo btrfs_stop_workers(&fs_info->flush_workers); 19757abadb64SLiu Bo } 19767abadb64SLiu Bo 1977af31f5e5SChris Mason /* helper to cleanup tree roots */ 1978af31f5e5SChris Mason static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) 1979af31f5e5SChris Mason { 1980af31f5e5SChris Mason free_extent_buffer(info->tree_root->node); 1981af31f5e5SChris Mason free_extent_buffer(info->tree_root->commit_root); 1982af31f5e5SChris Mason free_extent_buffer(info->dev_root->node); 1983af31f5e5SChris Mason free_extent_buffer(info->dev_root->commit_root); 1984af31f5e5SChris Mason free_extent_buffer(info->extent_root->node); 1985af31f5e5SChris Mason free_extent_buffer(info->extent_root->commit_root); 1986af31f5e5SChris Mason free_extent_buffer(info->csum_root->node); 1987af31f5e5SChris Mason free_extent_buffer(info->csum_root->commit_root); 1988bcef60f2SArne Jansen if (info->quota_root) { 1989bcef60f2SArne Jansen free_extent_buffer(info->quota_root->node); 1990bcef60f2SArne Jansen free_extent_buffer(info->quota_root->commit_root); 1991bcef60f2SArne Jansen } 1992af31f5e5SChris Mason 1993af31f5e5SChris Mason info->tree_root->node = NULL; 1994af31f5e5SChris Mason info->tree_root->commit_root = NULL; 1995af31f5e5SChris Mason info->dev_root->node = NULL; 1996af31f5e5SChris Mason info->dev_root->commit_root = NULL; 1997af31f5e5SChris Mason info->extent_root->node = NULL; 1998af31f5e5SChris Mason info->extent_root->commit_root = NULL; 1999af31f5e5SChris Mason info->csum_root->node = NULL; 2000af31f5e5SChris Mason info->csum_root->commit_root = NULL; 2001bcef60f2SArne Jansen if (info->quota_root) { 2002bcef60f2SArne Jansen info->quota_root->node = NULL; 2003bcef60f2SArne Jansen info->quota_root->commit_root = NULL; 2004bcef60f2SArne Jansen } 2005af31f5e5SChris Mason 2006af31f5e5SChris Mason if (chunk_root) { 2007af31f5e5SChris Mason free_extent_buffer(info->chunk_root->node); 2008af31f5e5SChris Mason free_extent_buffer(info->chunk_root->commit_root); 2009af31f5e5SChris Mason info->chunk_root->node = NULL; 2010af31f5e5SChris Mason info->chunk_root->commit_root = NULL; 2011af31f5e5SChris Mason } 2012af31f5e5SChris Mason } 2013af31f5e5SChris Mason 2014171f6537SJosef Bacik static void del_fs_roots(struct btrfs_fs_info *fs_info) 2015171f6537SJosef Bacik { 2016171f6537SJosef Bacik int ret; 2017171f6537SJosef Bacik struct btrfs_root *gang[8]; 2018171f6537SJosef Bacik int i; 2019171f6537SJosef Bacik 2020171f6537SJosef Bacik while (!list_empty(&fs_info->dead_roots)) { 2021171f6537SJosef Bacik gang[0] = list_entry(fs_info->dead_roots.next, 2022171f6537SJosef Bacik struct btrfs_root, root_list); 2023171f6537SJosef Bacik list_del(&gang[0]->root_list); 2024171f6537SJosef Bacik 2025171f6537SJosef Bacik if (gang[0]->in_radix) { 2026171f6537SJosef Bacik btrfs_free_fs_root(fs_info, gang[0]); 2027171f6537SJosef Bacik } else { 2028171f6537SJosef Bacik free_extent_buffer(gang[0]->node); 2029171f6537SJosef Bacik free_extent_buffer(gang[0]->commit_root); 2030171f6537SJosef Bacik kfree(gang[0]); 2031171f6537SJosef Bacik } 2032171f6537SJosef Bacik } 2033171f6537SJosef Bacik 2034171f6537SJosef Bacik while (1) { 2035171f6537SJosef Bacik ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 2036171f6537SJosef Bacik (void **)gang, 0, 2037171f6537SJosef Bacik ARRAY_SIZE(gang)); 2038171f6537SJosef Bacik if (!ret) 2039171f6537SJosef Bacik break; 2040171f6537SJosef Bacik for (i = 0; i < ret; i++) 2041171f6537SJosef Bacik btrfs_free_fs_root(fs_info, gang[i]); 2042171f6537SJosef Bacik } 2043171f6537SJosef Bacik } 2044af31f5e5SChris Mason 2045ad2b2c80SAl Viro int open_ctree(struct super_block *sb, 2046dfe25020SChris Mason struct btrfs_fs_devices *fs_devices, 2047dfe25020SChris Mason char *options) 2048eb60ceacSChris Mason { 2049db94535dSChris Mason u32 sectorsize; 2050db94535dSChris Mason u32 nodesize; 2051db94535dSChris Mason u32 leafsize; 2052db94535dSChris Mason u32 blocksize; 205387ee04ebSChris Mason u32 stripesize; 205484234f3aSYan Zheng u64 generation; 2055f2b636e8SJosef Bacik u64 features; 20563de4586cSChris Mason struct btrfs_key location; 2057a061fc8dSChris Mason struct buffer_head *bh; 20584d34b278SIlya Dryomov struct btrfs_super_block *disk_super; 2059815745cfSAl Viro struct btrfs_fs_info *fs_info = btrfs_sb(sb); 2060f84a8bd6SAl Viro struct btrfs_root *tree_root; 20614d34b278SIlya Dryomov struct btrfs_root *extent_root; 20624d34b278SIlya Dryomov struct btrfs_root *csum_root; 20634d34b278SIlya Dryomov struct btrfs_root *chunk_root; 20644d34b278SIlya Dryomov struct btrfs_root *dev_root; 2065bcef60f2SArne Jansen struct btrfs_root *quota_root; 2066e02119d5SChris Mason struct btrfs_root *log_tree_root; 2067eb60ceacSChris Mason int ret; 2068e58ca020SYan int err = -EINVAL; 2069af31f5e5SChris Mason int num_backups_tried = 0; 2070af31f5e5SChris Mason int backup_index = 0; 20714543df7eSChris Mason 2072f84a8bd6SAl Viro tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); 20736f07e42eSAl Viro extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); 20746f07e42eSAl Viro csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); 20756f07e42eSAl Viro chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); 20766f07e42eSAl Viro dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); 2077bcef60f2SArne Jansen quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); 20788790d502SChris Mason 2079f84a8bd6SAl Viro if (!tree_root || !extent_root || !csum_root || 2080bcef60f2SArne Jansen !chunk_root || !dev_root || !quota_root) { 208139279cc3SChris Mason err = -ENOMEM; 208239279cc3SChris Mason goto fail; 208339279cc3SChris Mason } 208476dda93cSYan, Zheng 208576dda93cSYan, Zheng ret = init_srcu_struct(&fs_info->subvol_srcu); 208676dda93cSYan, Zheng if (ret) { 208776dda93cSYan, Zheng err = ret; 208876dda93cSYan, Zheng goto fail; 208976dda93cSYan, Zheng } 209076dda93cSYan, Zheng 209176dda93cSYan, Zheng ret = setup_bdi(fs_info, &fs_info->bdi); 209276dda93cSYan, Zheng if (ret) { 209376dda93cSYan, Zheng err = ret; 209476dda93cSYan, Zheng goto fail_srcu; 209576dda93cSYan, Zheng } 209676dda93cSYan, Zheng 2097e2d84521SMiao Xie ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); 2098e2d84521SMiao Xie if (ret) { 2099e2d84521SMiao Xie err = ret; 2100e2d84521SMiao Xie goto fail_bdi; 2101e2d84521SMiao Xie } 2102e2d84521SMiao Xie fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * 2103e2d84521SMiao Xie (1 + ilog2(nr_cpu_ids)); 2104e2d84521SMiao Xie 2105963d678bSMiao Xie ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); 2106963d678bSMiao Xie if (ret) { 2107963d678bSMiao Xie err = ret; 2108963d678bSMiao Xie goto fail_dirty_metadata_bytes; 2109963d678bSMiao Xie } 2110963d678bSMiao Xie 211176dda93cSYan, Zheng fs_info->btree_inode = new_inode(sb); 211276dda93cSYan, Zheng if (!fs_info->btree_inode) { 211376dda93cSYan, Zheng err = -ENOMEM; 2114963d678bSMiao Xie goto fail_delalloc_bytes; 211576dda93cSYan, Zheng } 211676dda93cSYan, Zheng 2117a6591715SChris Mason mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); 21181561dedaSMiao Xie 211976dda93cSYan, Zheng INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); 21208fd17795SChris Mason INIT_LIST_HEAD(&fs_info->trans_list); 2121facda1e7SChris Mason INIT_LIST_HEAD(&fs_info->dead_roots); 212224bbcf04SYan, Zheng INIT_LIST_HEAD(&fs_info->delayed_iputs); 2123ea8c2819SChris Mason INIT_LIST_HEAD(&fs_info->delalloc_inodes); 212411833d66SYan Zheng INIT_LIST_HEAD(&fs_info->caching_block_groups); 21251832a6d5SChris Mason spin_lock_init(&fs_info->delalloc_lock); 2126a4abeea4SJosef Bacik spin_lock_init(&fs_info->trans_lock); 212776dda93cSYan, Zheng spin_lock_init(&fs_info->fs_roots_radix_lock); 212824bbcf04SYan, Zheng spin_lock_init(&fs_info->delayed_iput_lock); 21294cb5300bSChris Mason spin_lock_init(&fs_info->defrag_inodes_lock); 21302bf64758SJosef Bacik spin_lock_init(&fs_info->free_chunk_lock); 2131f29021b2SJan Schmidt spin_lock_init(&fs_info->tree_mod_seq_lock); 2132ceda0864SMiao Xie spin_lock_init(&fs_info->super_lock); 2133f29021b2SJan Schmidt rwlock_init(&fs_info->tree_mod_log_lock); 21347585717fSChris Mason mutex_init(&fs_info->reloc_mutex); 2135de98ced9SMiao Xie seqlock_init(&fs_info->profiles_lock); 213619c00ddcSChris Mason 213758176a96SJosef Bacik init_completion(&fs_info->kobj_unregister); 21380b86a832SChris Mason INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); 21396324fbf3SChris Mason INIT_LIST_HEAD(&fs_info->space_info); 2140f29021b2SJan Schmidt INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); 21410b86a832SChris Mason btrfs_mapping_init(&fs_info->mapping_tree); 214266d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->global_block_rsv, 214366d8f3ddSMiao Xie BTRFS_BLOCK_RSV_GLOBAL); 214466d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, 214566d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELALLOC); 214666d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); 214766d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); 214866d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); 214966d8f3ddSMiao Xie btrfs_init_block_rsv(&fs_info->delayed_block_rsv, 215066d8f3ddSMiao Xie BTRFS_BLOCK_RSV_DELOPS); 2151cb03c743SChris Mason atomic_set(&fs_info->nr_async_submits, 0); 2152771ed689SChris Mason atomic_set(&fs_info->async_delalloc_pages, 0); 21538c8bee1dSChris Mason atomic_set(&fs_info->async_submit_draining, 0); 21540986fe9eSChris Mason atomic_set(&fs_info->nr_async_bios, 0); 21554cb5300bSChris Mason atomic_set(&fs_info->defrag_running, 0); 2156f29021b2SJan Schmidt atomic_set(&fs_info->tree_mod_seq, 0); 2157e20d96d6SChris Mason fs_info->sb = sb; 21586f568d35SChris Mason fs_info->max_inline = 8192 * 1024; 21599ed74f2dSJosef Bacik fs_info->metadata_ratio = 0; 21604cb5300bSChris Mason fs_info->defrag_inodes = RB_ROOT; 2161a4abeea4SJosef Bacik fs_info->trans_no_join = 0; 21622bf64758SJosef Bacik fs_info->free_chunk_space = 0; 2163f29021b2SJan Schmidt fs_info->tree_mod_log = RB_ROOT; 2164c8b97818SChris Mason 216590519d66SArne Jansen /* readahead state */ 216690519d66SArne Jansen INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); 216790519d66SArne Jansen spin_lock_init(&fs_info->reada_lock); 21682c90e5d6SChris Mason 2169b34b086cSChris Mason fs_info->thread_pool_size = min_t(unsigned long, 2170b34b086cSChris Mason num_online_cpus() + 2, 8); 21710afbaf8cSChris Mason 21723eaa2885SChris Mason INIT_LIST_HEAD(&fs_info->ordered_extents); 21733eaa2885SChris Mason spin_lock_init(&fs_info->ordered_extent_lock); 217416cdcec7SMiao Xie fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), 217516cdcec7SMiao Xie GFP_NOFS); 217616cdcec7SMiao Xie if (!fs_info->delayed_root) { 217716cdcec7SMiao Xie err = -ENOMEM; 217816cdcec7SMiao Xie goto fail_iput; 217916cdcec7SMiao Xie } 218016cdcec7SMiao Xie btrfs_init_delayed_root(fs_info->delayed_root); 21813eaa2885SChris Mason 2182a2de733cSArne Jansen mutex_init(&fs_info->scrub_lock); 2183a2de733cSArne Jansen atomic_set(&fs_info->scrubs_running, 0); 2184a2de733cSArne Jansen atomic_set(&fs_info->scrub_pause_req, 0); 2185a2de733cSArne Jansen atomic_set(&fs_info->scrubs_paused, 0); 2186a2de733cSArne Jansen atomic_set(&fs_info->scrub_cancel_req, 0); 2187a2de733cSArne Jansen init_waitqueue_head(&fs_info->scrub_pause_wait); 2188a2de733cSArne Jansen init_rwsem(&fs_info->scrub_super_lock); 2189a2de733cSArne Jansen fs_info->scrub_workers_refcnt = 0; 219021adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 219121adbd5cSStefan Behrens fs_info->check_integrity_print_mask = 0; 219221adbd5cSStefan Behrens #endif 2193a2de733cSArne Jansen 2194c9e9f97bSIlya Dryomov spin_lock_init(&fs_info->balance_lock); 2195c9e9f97bSIlya Dryomov mutex_init(&fs_info->balance_mutex); 2196837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_running, 0); 2197837d5b6eSIlya Dryomov atomic_set(&fs_info->balance_pause_req, 0); 2198a7e99c69SIlya Dryomov atomic_set(&fs_info->balance_cancel_req, 0); 2199c9e9f97bSIlya Dryomov fs_info->balance_ctl = NULL; 2200837d5b6eSIlya Dryomov init_waitqueue_head(&fs_info->balance_wait_q); 2201a061fc8dSChris Mason 22020afbaf8cSChris Mason sb->s_blocksize = 4096; 22030afbaf8cSChris Mason sb->s_blocksize_bits = blksize_bits(4096); 220432a88aa1SJens Axboe sb->s_bdi = &fs_info->bdi; 22050afbaf8cSChris Mason 220676dda93cSYan, Zheng fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; 2207bfe86848SMiklos Szeredi set_nlink(fs_info->btree_inode, 1); 22080afbaf8cSChris Mason /* 22090afbaf8cSChris Mason * we set the i_size on the btree inode to the max possible int. 22100afbaf8cSChris Mason * the real end of the address space is determined by all of 22110afbaf8cSChris Mason * the devices in the system 22120afbaf8cSChris Mason */ 22130afbaf8cSChris Mason fs_info->btree_inode->i_size = OFFSET_MAX; 2214d98237b3SChris Mason fs_info->btree_inode->i_mapping->a_ops = &btree_aops; 221504160088SChris Mason fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; 221604160088SChris Mason 22175d4f98a2SYan Zheng RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); 2218d1310b2eSChris Mason extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, 2219f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 22200b32f4bbSJosef Bacik BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; 2221a8067e02SDavid Sterba extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); 22220da5468fSChris Mason 2223d1310b2eSChris Mason BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; 2224d1310b2eSChris Mason 22250f7d52f4SChris Mason BTRFS_I(fs_info->btree_inode)->root = tree_root; 22260f7d52f4SChris Mason memset(&BTRFS_I(fs_info->btree_inode)->location, 0, 22270f7d52f4SChris Mason sizeof(struct btrfs_key)); 222872ac3c0dSJosef Bacik set_bit(BTRFS_INODE_DUMMY, 222972ac3c0dSJosef Bacik &BTRFS_I(fs_info->btree_inode)->runtime_flags); 223022b0ebdaSChris Mason insert_inode_hash(fs_info->btree_inode); 223139279cc3SChris Mason 2232e02119d5SChris Mason spin_lock_init(&fs_info->block_group_cache_lock); 22336bef4d31SEric Paris fs_info->block_group_cache_tree = RB_ROOT; 2234a1897fddSLiu Bo fs_info->first_logical_byte = (u64)-1; 2235925baeddSChris Mason 223611833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[0], 2237f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 223811833d66SYan Zheng extent_io_tree_init(&fs_info->freed_extents[1], 2239f993c883SDavid Sterba fs_info->btree_inode->i_mapping); 224011833d66SYan Zheng fs_info->pinned_extents = &fs_info->freed_extents[0]; 2241e6dcd2dcSChris Mason fs_info->do_barriers = 1; 2242f9295749SChris Mason 2243d98237b3SChris Mason 22445a3f23d5SChris Mason mutex_init(&fs_info->ordered_operations_mutex); 224530ae8467SChris Mason mutex_init(&fs_info->tree_log_mutex); 2246925baeddSChris Mason mutex_init(&fs_info->chunk_mutex); 2247925baeddSChris Mason mutex_init(&fs_info->transaction_kthread_mutex); 2248a74a4b97SChris Mason mutex_init(&fs_info->cleaner_mutex); 2249a74a4b97SChris Mason mutex_init(&fs_info->volume_mutex); 2250276e680dSYan Zheng init_rwsem(&fs_info->extent_commit_sem); 2251c71bf099SYan, Zheng init_rwsem(&fs_info->cleanup_work_sem); 225276dda93cSYan, Zheng init_rwsem(&fs_info->subvol_sem); 2253e922e087SStefan Behrens fs_info->dev_replace.lock_owner = 0; 2254e922e087SStefan Behrens atomic_set(&fs_info->dev_replace.nesting_level, 0); 2255e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); 2256e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock_management_lock); 2257e922e087SStefan Behrens mutex_init(&fs_info->dev_replace.lock); 2258fa9c0d79SChris Mason 2259416ac51dSArne Jansen spin_lock_init(&fs_info->qgroup_lock); 2260f2f6ed3dSWang Shilong mutex_init(&fs_info->qgroup_ioctl_lock); 2261416ac51dSArne Jansen fs_info->qgroup_tree = RB_ROOT; 2262416ac51dSArne Jansen INIT_LIST_HEAD(&fs_info->dirty_qgroups); 2263416ac51dSArne Jansen fs_info->qgroup_seq = 1; 2264416ac51dSArne Jansen fs_info->quota_enabled = 0; 2265416ac51dSArne Jansen fs_info->pending_quota_state = 0; 2266416ac51dSArne Jansen 2267fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); 2268fa9c0d79SChris Mason btrfs_init_free_cluster(&fs_info->data_alloc_cluster); 2269fa9c0d79SChris Mason 22707d9eb12cSChris Mason init_waitqueue_head(&fs_info->transaction_throttle); 22713768f368SChris Mason init_waitqueue_head(&fs_info->transaction_wait); 2272bb9c12c9SSage Weil init_waitqueue_head(&fs_info->transaction_blocked_wait); 22734854ddd0SChris Mason init_waitqueue_head(&fs_info->async_submit_wait); 22749a8dd150SChris Mason 227553b381b3SDavid Woodhouse ret = btrfs_alloc_stripe_hash_table(fs_info); 227653b381b3SDavid Woodhouse if (ret) { 227783c8266aSDavid Sterba err = ret; 227853b381b3SDavid Woodhouse goto fail_alloc; 227953b381b3SDavid Woodhouse } 228053b381b3SDavid Woodhouse 22810b86a832SChris Mason __setup_root(4096, 4096, 4096, 4096, tree_root, 22822c90e5d6SChris Mason fs_info, BTRFS_ROOT_TREE_OBJECTID); 22837eccb903SChris Mason 22843c4bb26bSChris Mason invalidate_bdev(fs_devices->latest_bdev); 2285a512bbf8SYan Zheng bh = btrfs_read_dev_super(fs_devices->latest_bdev); 228620b45077SDave Young if (!bh) { 228720b45077SDave Young err = -EINVAL; 228816cdcec7SMiao Xie goto fail_alloc; 228920b45077SDave Young } 229039279cc3SChris Mason 22916c41761fSDavid Sterba memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); 22926c41761fSDavid Sterba memcpy(fs_info->super_for_commit, fs_info->super_copy, 22936c41761fSDavid Sterba sizeof(*fs_info->super_for_commit)); 2294a061fc8dSChris Mason brelse(bh); 22955f39d397SChris Mason 22966c41761fSDavid Sterba memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); 22970b86a832SChris Mason 22986c41761fSDavid Sterba disk_super = fs_info->super_copy; 22990f7d52f4SChris Mason if (!btrfs_super_root(disk_super)) 230016cdcec7SMiao Xie goto fail_alloc; 23010f7d52f4SChris Mason 2302acce952bSliubo /* check FS state, whether FS is broken. */ 230387533c47SMiao Xie if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) 230487533c47SMiao Xie set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); 2305acce952bSliubo 2306fcd1f065SDavid Sterba ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); 2307fcd1f065SDavid Sterba if (ret) { 2308fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); 2309fcd1f065SDavid Sterba err = ret; 2310fcd1f065SDavid Sterba goto fail_alloc; 2311fcd1f065SDavid Sterba } 2312acce952bSliubo 231375e7cb7fSLiu Bo /* 2314af31f5e5SChris Mason * run through our array of backup supers and setup 2315af31f5e5SChris Mason * our ring pointer to the oldest one 2316af31f5e5SChris Mason */ 2317af31f5e5SChris Mason generation = btrfs_super_generation(disk_super); 2318af31f5e5SChris Mason find_oldest_super_backup(fs_info, generation); 2319af31f5e5SChris Mason 2320af31f5e5SChris Mason /* 232175e7cb7fSLiu Bo * In the long term, we'll store the compression type in the super 232275e7cb7fSLiu Bo * block, and it'll be used for per file compression control. 232375e7cb7fSLiu Bo */ 232475e7cb7fSLiu Bo fs_info->compress_type = BTRFS_COMPRESS_ZLIB; 232575e7cb7fSLiu Bo 23262b82032cSYan Zheng ret = btrfs_parse_options(tree_root, options); 23272b82032cSYan Zheng if (ret) { 23282b82032cSYan Zheng err = ret; 232916cdcec7SMiao Xie goto fail_alloc; 23302b82032cSYan Zheng } 2331dfe25020SChris Mason 2332f2b636e8SJosef Bacik features = btrfs_super_incompat_flags(disk_super) & 2333f2b636e8SJosef Bacik ~BTRFS_FEATURE_INCOMPAT_SUPP; 2334f2b636e8SJosef Bacik if (features) { 2335f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount because of " 2336f2b636e8SJosef Bacik "unsupported optional features (%Lx).\n", 233721380931SJoel Becker (unsigned long long)features); 2338f2b636e8SJosef Bacik err = -EINVAL; 233916cdcec7SMiao Xie goto fail_alloc; 2340f2b636e8SJosef Bacik } 2341f2b636e8SJosef Bacik 2342727011e0SChris Mason if (btrfs_super_leafsize(disk_super) != 2343727011e0SChris Mason btrfs_super_nodesize(disk_super)) { 2344727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2345727011e0SChris Mason "blocksizes don't match. node %d leaf %d\n", 2346727011e0SChris Mason btrfs_super_nodesize(disk_super), 2347727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2348727011e0SChris Mason err = -EINVAL; 2349727011e0SChris Mason goto fail_alloc; 2350727011e0SChris Mason } 2351727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { 2352727011e0SChris Mason printk(KERN_ERR "BTRFS: couldn't mount because metadata " 2353727011e0SChris Mason "blocksize (%d) was too large\n", 2354727011e0SChris Mason btrfs_super_leafsize(disk_super)); 2355727011e0SChris Mason err = -EINVAL; 2356727011e0SChris Mason goto fail_alloc; 2357727011e0SChris Mason } 2358727011e0SChris Mason 23595d4f98a2SYan Zheng features = btrfs_super_incompat_flags(disk_super); 23605d4f98a2SYan Zheng features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; 236169e380d1SLi Zefan if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) 2362a6fa6faeSLi Zefan features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; 2363727011e0SChris Mason 23643173a18fSJosef Bacik if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) 23653173a18fSJosef Bacik printk(KERN_ERR "btrfs: has skinny extents\n"); 23663173a18fSJosef Bacik 2367727011e0SChris Mason /* 2368727011e0SChris Mason * flag our filesystem as having big metadata blocks if 2369727011e0SChris Mason * they are bigger than the page size 2370727011e0SChris Mason */ 2371727011e0SChris Mason if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { 2372727011e0SChris Mason if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) 2373727011e0SChris Mason printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); 2374727011e0SChris Mason features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; 2375727011e0SChris Mason } 2376727011e0SChris Mason 2377bc3f116fSChris Mason nodesize = btrfs_super_nodesize(disk_super); 2378bc3f116fSChris Mason leafsize = btrfs_super_leafsize(disk_super); 2379bc3f116fSChris Mason sectorsize = btrfs_super_sectorsize(disk_super); 2380bc3f116fSChris Mason stripesize = btrfs_super_stripesize(disk_super); 2381e2d84521SMiao Xie fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); 2382963d678bSMiao Xie fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); 2383bc3f116fSChris Mason 2384bc3f116fSChris Mason /* 2385bc3f116fSChris Mason * mixed block groups end up with duplicate but slightly offset 2386bc3f116fSChris Mason * extent buffers for the same range. It leads to corruptions 2387bc3f116fSChris Mason */ 2388bc3f116fSChris Mason if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && 2389bc3f116fSChris Mason (sectorsize != leafsize)) { 2390bc3f116fSChris Mason printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " 2391bc3f116fSChris Mason "are not allowed for mixed block groups on %s\n", 2392bc3f116fSChris Mason sb->s_id); 2393bc3f116fSChris Mason goto fail_alloc; 2394bc3f116fSChris Mason } 2395bc3f116fSChris Mason 2396ceda0864SMiao Xie /* 2397ceda0864SMiao Xie * Needn't use the lock because there is no other task which will 2398ceda0864SMiao Xie * update the flag. 2399ceda0864SMiao Xie */ 24005d4f98a2SYan Zheng btrfs_set_super_incompat_flags(disk_super, features); 24015d4f98a2SYan Zheng 2402f2b636e8SJosef Bacik features = btrfs_super_compat_ro_flags(disk_super) & 2403f2b636e8SJosef Bacik ~BTRFS_FEATURE_COMPAT_RO_SUPP; 2404f2b636e8SJosef Bacik if (!(sb->s_flags & MS_RDONLY) && features) { 2405f2b636e8SJosef Bacik printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " 2406f2b636e8SJosef Bacik "unsupported option features (%Lx).\n", 240721380931SJoel Becker (unsigned long long)features); 2408f2b636e8SJosef Bacik err = -EINVAL; 240916cdcec7SMiao Xie goto fail_alloc; 2410f2b636e8SJosef Bacik } 241161d92c32SChris Mason 241261d92c32SChris Mason btrfs_init_workers(&fs_info->generic_worker, 241361d92c32SChris Mason "genwork", 1, NULL); 241461d92c32SChris Mason 24155443be45SChris Mason btrfs_init_workers(&fs_info->workers, "worker", 241661d92c32SChris Mason fs_info->thread_pool_size, 241761d92c32SChris Mason &fs_info->generic_worker); 2418c8b97818SChris Mason 2419771ed689SChris Mason btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", 242061d92c32SChris Mason fs_info->thread_pool_size, 242161d92c32SChris Mason &fs_info->generic_worker); 2422771ed689SChris Mason 24238ccf6f19SMiao Xie btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", 24248ccf6f19SMiao Xie fs_info->thread_pool_size, 24258ccf6f19SMiao Xie &fs_info->generic_worker); 24268ccf6f19SMiao Xie 24275443be45SChris Mason btrfs_init_workers(&fs_info->submit_workers, "submit", 2428b720d209SChris Mason min_t(u64, fs_devices->num_devices, 242961d92c32SChris Mason fs_info->thread_pool_size), 243061d92c32SChris Mason &fs_info->generic_worker); 243161b49440SChris Mason 2432bab39bf9SJosef Bacik btrfs_init_workers(&fs_info->caching_workers, "cache", 2433bab39bf9SJosef Bacik 2, &fs_info->generic_worker); 2434bab39bf9SJosef Bacik 243561b49440SChris Mason /* a higher idle thresh on the submit workers makes it much more 243661b49440SChris Mason * likely that bios will be send down in a sane order to the 243761b49440SChris Mason * devices 243861b49440SChris Mason */ 243961b49440SChris Mason fs_info->submit_workers.idle_thresh = 64; 244053863232SChris Mason 2441771ed689SChris Mason fs_info->workers.idle_thresh = 16; 24424a69a410SChris Mason fs_info->workers.ordered = 1; 244361b49440SChris Mason 2444771ed689SChris Mason fs_info->delalloc_workers.idle_thresh = 2; 2445771ed689SChris Mason fs_info->delalloc_workers.ordered = 1; 2446771ed689SChris Mason 244761d92c32SChris Mason btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, 244861d92c32SChris Mason &fs_info->generic_worker); 24495443be45SChris Mason btrfs_init_workers(&fs_info->endio_workers, "endio", 245061d92c32SChris Mason fs_info->thread_pool_size, 245161d92c32SChris Mason &fs_info->generic_worker); 2452d20f7043SChris Mason btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", 245361d92c32SChris Mason fs_info->thread_pool_size, 245461d92c32SChris Mason &fs_info->generic_worker); 2455cad321adSChris Mason btrfs_init_workers(&fs_info->endio_meta_write_workers, 245661d92c32SChris Mason "endio-meta-write", fs_info->thread_pool_size, 245761d92c32SChris Mason &fs_info->generic_worker); 245853b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->endio_raid56_workers, 245953b381b3SDavid Woodhouse "endio-raid56", fs_info->thread_pool_size, 246053b381b3SDavid Woodhouse &fs_info->generic_worker); 246153b381b3SDavid Woodhouse btrfs_init_workers(&fs_info->rmw_workers, 246253b381b3SDavid Woodhouse "rmw", fs_info->thread_pool_size, 246353b381b3SDavid Woodhouse &fs_info->generic_worker); 24645443be45SChris Mason btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", 246561d92c32SChris Mason fs_info->thread_pool_size, 246661d92c32SChris Mason &fs_info->generic_worker); 24670cb59c99SJosef Bacik btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", 24680cb59c99SJosef Bacik 1, &fs_info->generic_worker); 246916cdcec7SMiao Xie btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", 247016cdcec7SMiao Xie fs_info->thread_pool_size, 247116cdcec7SMiao Xie &fs_info->generic_worker); 247290519d66SArne Jansen btrfs_init_workers(&fs_info->readahead_workers, "readahead", 247390519d66SArne Jansen fs_info->thread_pool_size, 247490519d66SArne Jansen &fs_info->generic_worker); 247561b49440SChris Mason 247661b49440SChris Mason /* 247761b49440SChris Mason * endios are largely parallel and should have a very 247861b49440SChris Mason * low idle thresh 247961b49440SChris Mason */ 248061b49440SChris Mason fs_info->endio_workers.idle_thresh = 4; 2481b51912c9SChris Mason fs_info->endio_meta_workers.idle_thresh = 4; 248253b381b3SDavid Woodhouse fs_info->endio_raid56_workers.idle_thresh = 4; 248353b381b3SDavid Woodhouse fs_info->rmw_workers.idle_thresh = 2; 2484b51912c9SChris Mason 24859042846bSChris Mason fs_info->endio_write_workers.idle_thresh = 2; 24869042846bSChris Mason fs_info->endio_meta_write_workers.idle_thresh = 2; 248790519d66SArne Jansen fs_info->readahead_workers.idle_thresh = 2; 24889042846bSChris Mason 24890dc3b84aSJosef Bacik /* 24900dc3b84aSJosef Bacik * btrfs_start_workers can really only fail because of ENOMEM so just 24910dc3b84aSJosef Bacik * return -ENOMEM if any of these fail. 24920dc3b84aSJosef Bacik */ 24930dc3b84aSJosef Bacik ret = btrfs_start_workers(&fs_info->workers); 24940dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->generic_worker); 24950dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->submit_workers); 24960dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delalloc_workers); 24970dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->fixup_workers); 24980dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_workers); 24990dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_workers); 250053b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->rmw_workers); 250153b381b3SDavid Woodhouse ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); 25020dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); 25030dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_write_workers); 25040dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); 25050dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->delayed_workers); 25060dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->caching_workers); 25070dc3b84aSJosef Bacik ret |= btrfs_start_workers(&fs_info->readahead_workers); 25088ccf6f19SMiao Xie ret |= btrfs_start_workers(&fs_info->flush_workers); 25090dc3b84aSJosef Bacik if (ret) { 2510fed425c7SIlya Dryomov err = -ENOMEM; 25110dc3b84aSJosef Bacik goto fail_sb_buffer; 25120dc3b84aSJosef Bacik } 25134543df7eSChris Mason 25144575c9ccSChris Mason fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); 2515c8b97818SChris Mason fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, 2516c8b97818SChris Mason 4 * 1024 * 1024 / PAGE_CACHE_SIZE); 25174575c9ccSChris Mason 2518db94535dSChris Mason tree_root->nodesize = nodesize; 2519db94535dSChris Mason tree_root->leafsize = leafsize; 2520db94535dSChris Mason tree_root->sectorsize = sectorsize; 252187ee04ebSChris Mason tree_root->stripesize = stripesize; 2522a061fc8dSChris Mason 2523a061fc8dSChris Mason sb->s_blocksize = sectorsize; 2524a061fc8dSChris Mason sb->s_blocksize_bits = blksize_bits(sectorsize); 2525db94535dSChris Mason 2526cdb4c574SZach Brown if (disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) { 2527d397712bSChris Mason printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); 252839279cc3SChris Mason goto fail_sb_buffer; 252939279cc3SChris Mason } 253019c00ddcSChris Mason 25318d082fb7SLiu Bo if (sectorsize != PAGE_SIZE) { 25328d082fb7SLiu Bo printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " 25338d082fb7SLiu Bo "found on %s\n", (unsigned long)sectorsize, sb->s_id); 2534941b2ddfSKeith Mannthey goto fail_sb_buffer; 2535941b2ddfSKeith Mannthey } 2536941b2ddfSKeith Mannthey 2537925baeddSChris Mason mutex_lock(&fs_info->chunk_mutex); 2538e4404d6eSYan Zheng ret = btrfs_read_sys_array(tree_root); 2539925baeddSChris Mason mutex_unlock(&fs_info->chunk_mutex); 254084eed90fSChris Mason if (ret) { 2541d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read the system " 2542d397712bSChris Mason "array on %s\n", sb->s_id); 25435d4f98a2SYan Zheng goto fail_sb_buffer; 254484eed90fSChris Mason } 25450b86a832SChris Mason 25460b86a832SChris Mason blocksize = btrfs_level_size(tree_root, 25470b86a832SChris Mason btrfs_super_chunk_root_level(disk_super)); 254884234f3aSYan Zheng generation = btrfs_super_chunk_root_generation(disk_super); 25490b86a832SChris Mason 25500b86a832SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 25510b86a832SChris Mason chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); 25520b86a832SChris Mason 25530b86a832SChris Mason chunk_root->node = read_tree_block(chunk_root, 25540b86a832SChris Mason btrfs_super_chunk_root(disk_super), 255584234f3aSYan Zheng blocksize, generation); 2556416bc658SJosef Bacik if (!chunk_root->node || 2557416bc658SJosef Bacik !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { 255883121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", 255983121942SDavid Woodhouse sb->s_id); 2560af31f5e5SChris Mason goto fail_tree_roots; 256183121942SDavid Woodhouse } 25625d4f98a2SYan Zheng btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); 25635d4f98a2SYan Zheng chunk_root->commit_root = btrfs_root_node(chunk_root); 25640b86a832SChris Mason 2565e17cade2SChris Mason read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, 2566e17cade2SChris Mason (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), 2567e17cade2SChris Mason BTRFS_UUID_SIZE); 2568e17cade2SChris Mason 25690b86a832SChris Mason ret = btrfs_read_chunk_tree(chunk_root); 25702b82032cSYan Zheng if (ret) { 2571d397712bSChris Mason printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", 2572d397712bSChris Mason sb->s_id); 2573af31f5e5SChris Mason goto fail_tree_roots; 25742b82032cSYan Zheng } 25750b86a832SChris Mason 25768dabb742SStefan Behrens /* 25778dabb742SStefan Behrens * keep the device that is marked to be the target device for the 25788dabb742SStefan Behrens * dev_replace procedure 25798dabb742SStefan Behrens */ 25808dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 0); 2581dfe25020SChris Mason 2582a6b0d5c8SChris Mason if (!fs_devices->latest_bdev) { 2583a6b0d5c8SChris Mason printk(KERN_CRIT "btrfs: failed to read devices on %s\n", 2584a6b0d5c8SChris Mason sb->s_id); 2585a6b0d5c8SChris Mason goto fail_tree_roots; 2586a6b0d5c8SChris Mason } 2587a6b0d5c8SChris Mason 2588af31f5e5SChris Mason retry_root_backup: 2589db94535dSChris Mason blocksize = btrfs_level_size(tree_root, 2590db94535dSChris Mason btrfs_super_root_level(disk_super)); 259184234f3aSYan Zheng generation = btrfs_super_generation(disk_super); 25920b86a832SChris Mason 2593e20d96d6SChris Mason tree_root->node = read_tree_block(tree_root, 2594db94535dSChris Mason btrfs_super_root(disk_super), 259584234f3aSYan Zheng blocksize, generation); 2596af31f5e5SChris Mason if (!tree_root->node || 2597af31f5e5SChris Mason !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { 259883121942SDavid Woodhouse printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", 259983121942SDavid Woodhouse sb->s_id); 2600af31f5e5SChris Mason 2601af31f5e5SChris Mason goto recovery_tree_root; 260283121942SDavid Woodhouse } 2603af31f5e5SChris Mason 26045d4f98a2SYan Zheng btrfs_set_root_node(&tree_root->root_item, tree_root->node); 26055d4f98a2SYan Zheng tree_root->commit_root = btrfs_root_node(tree_root); 2606db94535dSChris Mason 2607db94535dSChris Mason ret = find_and_setup_root(tree_root, fs_info, 2608e20d96d6SChris Mason BTRFS_EXTENT_TREE_OBJECTID, extent_root); 26090b86a832SChris Mason if (ret) 2610af31f5e5SChris Mason goto recovery_tree_root; 26110b86a832SChris Mason extent_root->track_dirty = 1; 26120b86a832SChris Mason 26130b86a832SChris Mason ret = find_and_setup_root(tree_root, fs_info, 26140b86a832SChris Mason BTRFS_DEV_TREE_OBJECTID, dev_root); 26150b86a832SChris Mason if (ret) 2616af31f5e5SChris Mason goto recovery_tree_root; 26175d4f98a2SYan Zheng dev_root->track_dirty = 1; 26183768f368SChris Mason 2619d20f7043SChris Mason ret = find_and_setup_root(tree_root, fs_info, 2620d20f7043SChris Mason BTRFS_CSUM_TREE_OBJECTID, csum_root); 2621d20f7043SChris Mason if (ret) 2622af31f5e5SChris Mason goto recovery_tree_root; 2623d20f7043SChris Mason csum_root->track_dirty = 1; 2624d20f7043SChris Mason 2625bcef60f2SArne Jansen ret = find_and_setup_root(tree_root, fs_info, 2626bcef60f2SArne Jansen BTRFS_QUOTA_TREE_OBJECTID, quota_root); 2627bcef60f2SArne Jansen if (ret) { 2628bcef60f2SArne Jansen kfree(quota_root); 2629bcef60f2SArne Jansen quota_root = fs_info->quota_root = NULL; 2630bcef60f2SArne Jansen } else { 2631bcef60f2SArne Jansen quota_root->track_dirty = 1; 2632bcef60f2SArne Jansen fs_info->quota_enabled = 1; 2633bcef60f2SArne Jansen fs_info->pending_quota_state = 1; 2634bcef60f2SArne Jansen } 2635bcef60f2SArne Jansen 26368929ecfaSYan, Zheng fs_info->generation = generation; 26378929ecfaSYan, Zheng fs_info->last_trans_committed = generation; 26388929ecfaSYan, Zheng 263968310a5eSIlya Dryomov ret = btrfs_recover_balance(fs_info); 264068310a5eSIlya Dryomov if (ret) { 264168310a5eSIlya Dryomov printk(KERN_WARNING "btrfs: failed to recover balance\n"); 264268310a5eSIlya Dryomov goto fail_block_groups; 264368310a5eSIlya Dryomov } 264468310a5eSIlya Dryomov 2645733f4fbbSStefan Behrens ret = btrfs_init_dev_stats(fs_info); 2646733f4fbbSStefan Behrens if (ret) { 2647733f4fbbSStefan Behrens printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", 2648733f4fbbSStefan Behrens ret); 2649733f4fbbSStefan Behrens goto fail_block_groups; 2650733f4fbbSStefan Behrens } 2651733f4fbbSStefan Behrens 26528dabb742SStefan Behrens ret = btrfs_init_dev_replace(fs_info); 26538dabb742SStefan Behrens if (ret) { 26548dabb742SStefan Behrens pr_err("btrfs: failed to init dev_replace: %d\n", ret); 26558dabb742SStefan Behrens goto fail_block_groups; 26568dabb742SStefan Behrens } 26578dabb742SStefan Behrens 26588dabb742SStefan Behrens btrfs_close_extra_devices(fs_info, fs_devices, 1); 26598dabb742SStefan Behrens 2660c59021f8Sliubo ret = btrfs_init_space_info(fs_info); 2661c59021f8Sliubo if (ret) { 2662c59021f8Sliubo printk(KERN_ERR "Failed to initial space info: %d\n", ret); 2663c59021f8Sliubo goto fail_block_groups; 2664c59021f8Sliubo } 2665c59021f8Sliubo 26661b1d1f66SJosef Bacik ret = btrfs_read_block_groups(extent_root); 26671b1d1f66SJosef Bacik if (ret) { 26681b1d1f66SJosef Bacik printk(KERN_ERR "Failed to read block groups: %d\n", ret); 26691b1d1f66SJosef Bacik goto fail_block_groups; 26701b1d1f66SJosef Bacik } 26715af3e8ccSStefan Behrens fs_info->num_tolerated_disk_barrier_failures = 26725af3e8ccSStefan Behrens btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); 2673292fd7fcSStefan Behrens if (fs_info->fs_devices->missing_devices > 2674292fd7fcSStefan Behrens fs_info->num_tolerated_disk_barrier_failures && 2675292fd7fcSStefan Behrens !(sb->s_flags & MS_RDONLY)) { 2676292fd7fcSStefan Behrens printk(KERN_WARNING 2677292fd7fcSStefan Behrens "Btrfs: too many missing devices, writeable mount is not allowed\n"); 2678292fd7fcSStefan Behrens goto fail_block_groups; 2679292fd7fcSStefan Behrens } 26809078a3e1SChris Mason 2681a74a4b97SChris Mason fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 2682a74a4b97SChris Mason "btrfs-cleaner"); 268357506d50SQinghuang Feng if (IS_ERR(fs_info->cleaner_kthread)) 26841b1d1f66SJosef Bacik goto fail_block_groups; 2685a74a4b97SChris Mason 2686a74a4b97SChris Mason fs_info->transaction_kthread = kthread_run(transaction_kthread, 2687a74a4b97SChris Mason tree_root, 2688a74a4b97SChris Mason "btrfs-transaction"); 268957506d50SQinghuang Feng if (IS_ERR(fs_info->transaction_kthread)) 26903f157a2fSChris Mason goto fail_cleaner; 2691a74a4b97SChris Mason 2692c289811cSChris Mason if (!btrfs_test_opt(tree_root, SSD) && 2693c289811cSChris Mason !btrfs_test_opt(tree_root, NOSSD) && 2694c289811cSChris Mason !fs_info->fs_devices->rotating) { 2695c289811cSChris Mason printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " 2696c289811cSChris Mason "mode\n"); 2697c289811cSChris Mason btrfs_set_opt(fs_info->mount_opt, SSD); 2698c289811cSChris Mason } 2699c289811cSChris Mason 270021adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 270121adbd5cSStefan Behrens if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { 270221adbd5cSStefan Behrens ret = btrfsic_mount(tree_root, fs_devices, 270321adbd5cSStefan Behrens btrfs_test_opt(tree_root, 270421adbd5cSStefan Behrens CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? 270521adbd5cSStefan Behrens 1 : 0, 270621adbd5cSStefan Behrens fs_info->check_integrity_print_mask); 270721adbd5cSStefan Behrens if (ret) 270821adbd5cSStefan Behrens printk(KERN_WARNING "btrfs: failed to initialize" 270921adbd5cSStefan Behrens " integrity check module %s\n", sb->s_id); 271021adbd5cSStefan Behrens } 271121adbd5cSStefan Behrens #endif 2712bcef60f2SArne Jansen ret = btrfs_read_qgroup_config(fs_info); 2713bcef60f2SArne Jansen if (ret) 2714bcef60f2SArne Jansen goto fail_trans_kthread; 271521adbd5cSStefan Behrens 2716acce952bSliubo /* do not make disk changes in broken FS */ 271768ce9682SStefan Behrens if (btrfs_super_log_root(disk_super) != 0) { 2718e02119d5SChris Mason u64 bytenr = btrfs_super_log_root(disk_super); 2719d18a2c44SChris Mason 27207c2ca468SChris Mason if (fs_devices->rw_devices == 0) { 2721d397712bSChris Mason printk(KERN_WARNING "Btrfs log replay required " 2722d397712bSChris Mason "on RO media\n"); 27237c2ca468SChris Mason err = -EIO; 2724bcef60f2SArne Jansen goto fail_qgroup; 27257c2ca468SChris Mason } 2726e02119d5SChris Mason blocksize = 2727e02119d5SChris Mason btrfs_level_size(tree_root, 2728e02119d5SChris Mason btrfs_super_log_root_level(disk_super)); 2729e02119d5SChris Mason 27306f07e42eSAl Viro log_tree_root = btrfs_alloc_root(fs_info); 2731676e4c86SDan Carpenter if (!log_tree_root) { 2732676e4c86SDan Carpenter err = -ENOMEM; 2733bcef60f2SArne Jansen goto fail_qgroup; 2734676e4c86SDan Carpenter } 2735e02119d5SChris Mason 2736e02119d5SChris Mason __setup_root(nodesize, leafsize, sectorsize, stripesize, 2737e02119d5SChris Mason log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); 2738e02119d5SChris Mason 2739e02119d5SChris Mason log_tree_root->node = read_tree_block(tree_root, bytenr, 274084234f3aSYan Zheng blocksize, 274184234f3aSYan Zheng generation + 1); 2742416bc658SJosef Bacik if (!log_tree_root->node || 2743416bc658SJosef Bacik !extent_buffer_uptodate(log_tree_root->node)) { 2744416bc658SJosef Bacik printk(KERN_ERR "btrfs: failed to read log tree\n"); 2745416bc658SJosef Bacik free_extent_buffer(log_tree_root->node); 2746416bc658SJosef Bacik kfree(log_tree_root); 2747416bc658SJosef Bacik goto fail_trans_kthread; 2748416bc658SJosef Bacik } 274979787eaaSJeff Mahoney /* returns with log_tree_root freed on success */ 2750e02119d5SChris Mason ret = btrfs_recover_log_trees(log_tree_root); 275179787eaaSJeff Mahoney if (ret) { 275279787eaaSJeff Mahoney btrfs_error(tree_root->fs_info, ret, 275379787eaaSJeff Mahoney "Failed to recover log tree"); 275479787eaaSJeff Mahoney free_extent_buffer(log_tree_root->node); 275579787eaaSJeff Mahoney kfree(log_tree_root); 275679787eaaSJeff Mahoney goto fail_trans_kthread; 275779787eaaSJeff Mahoney } 2758e556ce2cSYan Zheng 2759e556ce2cSYan Zheng if (sb->s_flags & MS_RDONLY) { 2760e556ce2cSYan Zheng ret = btrfs_commit_super(tree_root); 276179787eaaSJeff Mahoney if (ret) 276279787eaaSJeff Mahoney goto fail_trans_kthread; 2763e556ce2cSYan Zheng } 2764e02119d5SChris Mason } 27651a40e23bSZheng Yan 276676dda93cSYan, Zheng ret = btrfs_find_orphan_roots(tree_root); 276779787eaaSJeff Mahoney if (ret) 276879787eaaSJeff Mahoney goto fail_trans_kthread; 276976dda93cSYan, Zheng 27707c2ca468SChris Mason if (!(sb->s_flags & MS_RDONLY)) { 2771d68fc57bSYan, Zheng ret = btrfs_cleanup_fs_roots(fs_info); 277244c44af2SIlya Dryomov if (ret) 277344c44af2SIlya Dryomov goto fail_trans_kthread; 2774d68fc57bSYan, Zheng 27755d4f98a2SYan Zheng ret = btrfs_recover_relocation(tree_root); 2776d7ce5843SMiao Xie if (ret < 0) { 2777d7ce5843SMiao Xie printk(KERN_WARNING 2778d7ce5843SMiao Xie "btrfs: failed to recover relocation\n"); 2779d7ce5843SMiao Xie err = -EINVAL; 2780bcef60f2SArne Jansen goto fail_qgroup; 2781d7ce5843SMiao Xie } 27827c2ca468SChris Mason } 27831a40e23bSZheng Yan 27843de4586cSChris Mason location.objectid = BTRFS_FS_TREE_OBJECTID; 27853de4586cSChris Mason location.type = BTRFS_ROOT_ITEM_KEY; 27863de4586cSChris Mason location.offset = (u64)-1; 27873de4586cSChris Mason 27883de4586cSChris Mason fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); 27893de4586cSChris Mason if (!fs_info->fs_root) 2790bcef60f2SArne Jansen goto fail_qgroup; 27913140c9a3SDan Carpenter if (IS_ERR(fs_info->fs_root)) { 27923140c9a3SDan Carpenter err = PTR_ERR(fs_info->fs_root); 2793bcef60f2SArne Jansen goto fail_qgroup; 27943140c9a3SDan Carpenter } 2795c289811cSChris Mason 27962b6ba629SIlya Dryomov if (sb->s_flags & MS_RDONLY) 27972b6ba629SIlya Dryomov return 0; 27982b6ba629SIlya Dryomov 2799e3acc2a6SJosef Bacik down_read(&fs_info->cleanup_work_sem); 28002b6ba629SIlya Dryomov if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || 28012b6ba629SIlya Dryomov (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { 28022b6ba629SIlya Dryomov up_read(&fs_info->cleanup_work_sem); 28032b6ba629SIlya Dryomov close_ctree(tree_root); 28042b6ba629SIlya Dryomov return ret; 28052b6ba629SIlya Dryomov } 2806e3acc2a6SJosef Bacik up_read(&fs_info->cleanup_work_sem); 280759641015SIlya Dryomov 28082b6ba629SIlya Dryomov ret = btrfs_resume_balance_async(fs_info); 28092b6ba629SIlya Dryomov if (ret) { 28102b6ba629SIlya Dryomov printk(KERN_WARNING "btrfs: failed to resume balance\n"); 281166b4ffd1SJosef Bacik close_ctree(tree_root); 28122b6ba629SIlya Dryomov return ret; 2813e3acc2a6SJosef Bacik } 2814e3acc2a6SJosef Bacik 28158dabb742SStefan Behrens ret = btrfs_resume_dev_replace_async(fs_info); 28168dabb742SStefan Behrens if (ret) { 28178dabb742SStefan Behrens pr_warn("btrfs: failed to resume dev_replace\n"); 28188dabb742SStefan Behrens close_ctree(tree_root); 28198dabb742SStefan Behrens return ret; 28208dabb742SStefan Behrens } 28218dabb742SStefan Behrens 2822ad2b2c80SAl Viro return 0; 282339279cc3SChris Mason 2824bcef60f2SArne Jansen fail_qgroup: 2825bcef60f2SArne Jansen btrfs_free_qgroup_config(fs_info); 28267c2ca468SChris Mason fail_trans_kthread: 28277c2ca468SChris Mason kthread_stop(fs_info->transaction_kthread); 2828171f6537SJosef Bacik del_fs_roots(fs_info); 282954067ae9SJosef Bacik btrfs_cleanup_transaction(fs_info->tree_root); 28303f157a2fSChris Mason fail_cleaner: 2831a74a4b97SChris Mason kthread_stop(fs_info->cleaner_kthread); 28327c2ca468SChris Mason 28337c2ca468SChris Mason /* 28347c2ca468SChris Mason * make sure we're done with the btree inode before we stop our 28357c2ca468SChris Mason * kthreads 28367c2ca468SChris Mason */ 28377c2ca468SChris Mason filemap_write_and_wait(fs_info->btree_inode->i_mapping); 28387c2ca468SChris Mason 28391b1d1f66SJosef Bacik fail_block_groups: 284054067ae9SJosef Bacik btrfs_put_block_group_cache(fs_info); 28411b1d1f66SJosef Bacik btrfs_free_block_groups(fs_info); 2842af31f5e5SChris Mason 2843af31f5e5SChris Mason fail_tree_roots: 2844af31f5e5SChris Mason free_root_pointers(fs_info, 1); 28452b8195bbSMiao Xie invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 2846af31f5e5SChris Mason 284739279cc3SChris Mason fail_sb_buffer: 28487abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 284916cdcec7SMiao Xie fail_alloc: 28504543df7eSChris Mason fail_iput: 2851586e46e2SIlya Dryomov btrfs_mapping_tree_free(&fs_info->mapping_tree); 2852586e46e2SIlya Dryomov 28534543df7eSChris Mason iput(fs_info->btree_inode); 2854963d678bSMiao Xie fail_delalloc_bytes: 2855963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 2856e2d84521SMiao Xie fail_dirty_metadata_bytes: 2857e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 2858ad081f14SJens Axboe fail_bdi: 28597e662854SQinghuang Feng bdi_destroy(&fs_info->bdi); 286076dda93cSYan, Zheng fail_srcu: 286176dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 28627e662854SQinghuang Feng fail: 286353b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 2864586e46e2SIlya Dryomov btrfs_close_devices(fs_info->fs_devices); 2865ad2b2c80SAl Viro return err; 2866af31f5e5SChris Mason 2867af31f5e5SChris Mason recovery_tree_root: 2868af31f5e5SChris Mason if (!btrfs_test_opt(tree_root, RECOVERY)) 2869af31f5e5SChris Mason goto fail_tree_roots; 2870af31f5e5SChris Mason 2871af31f5e5SChris Mason free_root_pointers(fs_info, 0); 2872af31f5e5SChris Mason 2873af31f5e5SChris Mason /* don't use the log in recovery mode, it won't be valid */ 2874af31f5e5SChris Mason btrfs_set_super_log_root(disk_super, 0); 2875af31f5e5SChris Mason 2876af31f5e5SChris Mason /* we can't trust the free space cache either */ 2877af31f5e5SChris Mason btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); 2878af31f5e5SChris Mason 2879af31f5e5SChris Mason ret = next_root_backup(fs_info, fs_info->super_copy, 2880af31f5e5SChris Mason &num_backups_tried, &backup_index); 2881af31f5e5SChris Mason if (ret == -1) 2882af31f5e5SChris Mason goto fail_block_groups; 2883af31f5e5SChris Mason goto retry_root_backup; 2884eb60ceacSChris Mason } 2885eb60ceacSChris Mason 2886f2984462SChris Mason static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) 2887f2984462SChris Mason { 2888f2984462SChris Mason if (uptodate) { 2889f2984462SChris Mason set_buffer_uptodate(bh); 2890f2984462SChris Mason } else { 2891442a4f63SStefan Behrens struct btrfs_device *device = (struct btrfs_device *) 2892442a4f63SStefan Behrens bh->b_private; 2893442a4f63SStefan Behrens 2894606686eeSJosef Bacik printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " 2895606686eeSJosef Bacik "I/O error on %s\n", 2896606686eeSJosef Bacik rcu_str_deref(device->name)); 28971259ab75SChris Mason /* note, we dont' set_buffer_write_io_error because we have 28981259ab75SChris Mason * our own ways of dealing with the IO errors 28991259ab75SChris Mason */ 2900f2984462SChris Mason clear_buffer_uptodate(bh); 2901442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); 2902f2984462SChris Mason } 2903f2984462SChris Mason unlock_buffer(bh); 2904f2984462SChris Mason put_bh(bh); 2905f2984462SChris Mason } 2906f2984462SChris Mason 2907a512bbf8SYan Zheng struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) 2908a512bbf8SYan Zheng { 2909a512bbf8SYan Zheng struct buffer_head *bh; 2910a512bbf8SYan Zheng struct buffer_head *latest = NULL; 2911a512bbf8SYan Zheng struct btrfs_super_block *super; 2912a512bbf8SYan Zheng int i; 2913a512bbf8SYan Zheng u64 transid = 0; 2914a512bbf8SYan Zheng u64 bytenr; 2915a512bbf8SYan Zheng 2916a512bbf8SYan Zheng /* we would like to check all the supers, but that would make 2917a512bbf8SYan Zheng * a btrfs mount succeed after a mkfs from a different FS. 2918a512bbf8SYan Zheng * So, we need to add a special mount option to scan for 2919a512bbf8SYan Zheng * later supers, using BTRFS_SUPER_MIRROR_MAX instead 2920a512bbf8SYan Zheng */ 2921a512bbf8SYan Zheng for (i = 0; i < 1; i++) { 2922a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2923a512bbf8SYan Zheng if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) 2924a512bbf8SYan Zheng break; 2925a512bbf8SYan Zheng bh = __bread(bdev, bytenr / 4096, 4096); 2926a512bbf8SYan Zheng if (!bh) 2927a512bbf8SYan Zheng continue; 2928a512bbf8SYan Zheng 2929a512bbf8SYan Zheng super = (struct btrfs_super_block *)bh->b_data; 2930a512bbf8SYan Zheng if (btrfs_super_bytenr(super) != bytenr || 2931cdb4c574SZach Brown super->magic != cpu_to_le64(BTRFS_MAGIC)) { 2932a512bbf8SYan Zheng brelse(bh); 2933a512bbf8SYan Zheng continue; 2934a512bbf8SYan Zheng } 2935a512bbf8SYan Zheng 2936a512bbf8SYan Zheng if (!latest || btrfs_super_generation(super) > transid) { 2937a512bbf8SYan Zheng brelse(latest); 2938a512bbf8SYan Zheng latest = bh; 2939a512bbf8SYan Zheng transid = btrfs_super_generation(super); 2940a512bbf8SYan Zheng } else { 2941a512bbf8SYan Zheng brelse(bh); 2942a512bbf8SYan Zheng } 2943a512bbf8SYan Zheng } 2944a512bbf8SYan Zheng return latest; 2945a512bbf8SYan Zheng } 2946a512bbf8SYan Zheng 29474eedeb75SHisashi Hifumi /* 29484eedeb75SHisashi Hifumi * this should be called twice, once with wait == 0 and 29494eedeb75SHisashi Hifumi * once with wait == 1. When wait == 0 is done, all the buffer heads 29504eedeb75SHisashi Hifumi * we write are pinned. 29514eedeb75SHisashi Hifumi * 29524eedeb75SHisashi Hifumi * They are released when wait == 1 is done. 29534eedeb75SHisashi Hifumi * max_mirrors must be the same for both runs, and it indicates how 29544eedeb75SHisashi Hifumi * many supers on this one device should be written. 29554eedeb75SHisashi Hifumi * 29564eedeb75SHisashi Hifumi * max_mirrors == 0 means to write them all. 29574eedeb75SHisashi Hifumi */ 2958a512bbf8SYan Zheng static int write_dev_supers(struct btrfs_device *device, 2959a512bbf8SYan Zheng struct btrfs_super_block *sb, 2960a512bbf8SYan Zheng int do_barriers, int wait, int max_mirrors) 2961a512bbf8SYan Zheng { 2962a512bbf8SYan Zheng struct buffer_head *bh; 2963a512bbf8SYan Zheng int i; 2964a512bbf8SYan Zheng int ret; 2965a512bbf8SYan Zheng int errors = 0; 2966a512bbf8SYan Zheng u32 crc; 2967a512bbf8SYan Zheng u64 bytenr; 2968a512bbf8SYan Zheng 2969a512bbf8SYan Zheng if (max_mirrors == 0) 2970a512bbf8SYan Zheng max_mirrors = BTRFS_SUPER_MIRROR_MAX; 2971a512bbf8SYan Zheng 2972a512bbf8SYan Zheng for (i = 0; i < max_mirrors; i++) { 2973a512bbf8SYan Zheng bytenr = btrfs_sb_offset(i); 2974a512bbf8SYan Zheng if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) 2975a512bbf8SYan Zheng break; 2976a512bbf8SYan Zheng 2977a512bbf8SYan Zheng if (wait) { 2978a512bbf8SYan Zheng bh = __find_get_block(device->bdev, bytenr / 4096, 2979a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 2980a512bbf8SYan Zheng BUG_ON(!bh); 2981a512bbf8SYan Zheng wait_on_buffer(bh); 29824eedeb75SHisashi Hifumi if (!buffer_uptodate(bh)) 29834eedeb75SHisashi Hifumi errors++; 29844eedeb75SHisashi Hifumi 29854eedeb75SHisashi Hifumi /* drop our reference */ 29864eedeb75SHisashi Hifumi brelse(bh); 29874eedeb75SHisashi Hifumi 29884eedeb75SHisashi Hifumi /* drop the reference from the wait == 0 run */ 2989a512bbf8SYan Zheng brelse(bh); 2990a512bbf8SYan Zheng continue; 2991a512bbf8SYan Zheng } else { 2992a512bbf8SYan Zheng btrfs_set_super_bytenr(sb, bytenr); 2993a512bbf8SYan Zheng 2994a512bbf8SYan Zheng crc = ~(u32)0; 2995b0496686SLiu Bo crc = btrfs_csum_data((char *)sb + 2996a512bbf8SYan Zheng BTRFS_CSUM_SIZE, crc, 2997a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE - 2998a512bbf8SYan Zheng BTRFS_CSUM_SIZE); 2999a512bbf8SYan Zheng btrfs_csum_final(crc, sb->csum); 3000a512bbf8SYan Zheng 30014eedeb75SHisashi Hifumi /* 30024eedeb75SHisashi Hifumi * one reference for us, and we leave it for the 30034eedeb75SHisashi Hifumi * caller 30044eedeb75SHisashi Hifumi */ 3005a512bbf8SYan Zheng bh = __getblk(device->bdev, bytenr / 4096, 3006a512bbf8SYan Zheng BTRFS_SUPER_INFO_SIZE); 3007a512bbf8SYan Zheng memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); 3008a512bbf8SYan Zheng 30094eedeb75SHisashi Hifumi /* one reference for submit_bh */ 3010a512bbf8SYan Zheng get_bh(bh); 30114eedeb75SHisashi Hifumi 30124eedeb75SHisashi Hifumi set_buffer_uptodate(bh); 3013a512bbf8SYan Zheng lock_buffer(bh); 3014a512bbf8SYan Zheng bh->b_end_io = btrfs_end_buffer_write_sync; 3015442a4f63SStefan Behrens bh->b_private = device; 3016a512bbf8SYan Zheng } 3017a512bbf8SYan Zheng 3018387125fcSChris Mason /* 3019387125fcSChris Mason * we fua the first super. The others we allow 3020387125fcSChris Mason * to go down lazy. 3021387125fcSChris Mason */ 302221adbd5cSStefan Behrens ret = btrfsic_submit_bh(WRITE_FUA, bh); 30234eedeb75SHisashi Hifumi if (ret) 3024a512bbf8SYan Zheng errors++; 3025a512bbf8SYan Zheng } 3026a512bbf8SYan Zheng return errors < i ? 0 : -1; 3027a512bbf8SYan Zheng } 3028a512bbf8SYan Zheng 3029387125fcSChris Mason /* 3030387125fcSChris Mason * endio for the write_dev_flush, this will wake anyone waiting 3031387125fcSChris Mason * for the barrier when it is done 3032387125fcSChris Mason */ 3033387125fcSChris Mason static void btrfs_end_empty_barrier(struct bio *bio, int err) 3034387125fcSChris Mason { 3035387125fcSChris Mason if (err) { 3036387125fcSChris Mason if (err == -EOPNOTSUPP) 3037387125fcSChris Mason set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); 3038387125fcSChris Mason clear_bit(BIO_UPTODATE, &bio->bi_flags); 3039387125fcSChris Mason } 3040387125fcSChris Mason if (bio->bi_private) 3041387125fcSChris Mason complete(bio->bi_private); 3042387125fcSChris Mason bio_put(bio); 3043387125fcSChris Mason } 3044387125fcSChris Mason 3045387125fcSChris Mason /* 3046387125fcSChris Mason * trigger flushes for one the devices. If you pass wait == 0, the flushes are 3047387125fcSChris Mason * sent down. With wait == 1, it waits for the previous flush. 3048387125fcSChris Mason * 3049387125fcSChris Mason * any device where the flush fails with eopnotsupp are flagged as not-barrier 3050387125fcSChris Mason * capable 3051387125fcSChris Mason */ 3052387125fcSChris Mason static int write_dev_flush(struct btrfs_device *device, int wait) 3053387125fcSChris Mason { 3054387125fcSChris Mason struct bio *bio; 3055387125fcSChris Mason int ret = 0; 3056387125fcSChris Mason 3057387125fcSChris Mason if (device->nobarriers) 3058387125fcSChris Mason return 0; 3059387125fcSChris Mason 3060387125fcSChris Mason if (wait) { 3061387125fcSChris Mason bio = device->flush_bio; 3062387125fcSChris Mason if (!bio) 3063387125fcSChris Mason return 0; 3064387125fcSChris Mason 3065387125fcSChris Mason wait_for_completion(&device->flush_wait); 3066387125fcSChris Mason 3067387125fcSChris Mason if (bio_flagged(bio, BIO_EOPNOTSUPP)) { 3068606686eeSJosef Bacik printk_in_rcu("btrfs: disabling barriers on dev %s\n", 3069606686eeSJosef Bacik rcu_str_deref(device->name)); 3070387125fcSChris Mason device->nobarriers = 1; 30715af3e8ccSStefan Behrens } else if (!bio_flagged(bio, BIO_UPTODATE)) { 3072387125fcSChris Mason ret = -EIO; 3073442a4f63SStefan Behrens btrfs_dev_stat_inc_and_print(device, 3074442a4f63SStefan Behrens BTRFS_DEV_STAT_FLUSH_ERRS); 3075387125fcSChris Mason } 3076387125fcSChris Mason 3077387125fcSChris Mason /* drop the reference from the wait == 0 run */ 3078387125fcSChris Mason bio_put(bio); 3079387125fcSChris Mason device->flush_bio = NULL; 3080387125fcSChris Mason 3081387125fcSChris Mason return ret; 3082387125fcSChris Mason } 3083387125fcSChris Mason 3084387125fcSChris Mason /* 3085387125fcSChris Mason * one reference for us, and we leave it for the 3086387125fcSChris Mason * caller 3087387125fcSChris Mason */ 30889c017abcSJesper Juhl device->flush_bio = NULL; 3089387125fcSChris Mason bio = bio_alloc(GFP_NOFS, 0); 3090387125fcSChris Mason if (!bio) 3091387125fcSChris Mason return -ENOMEM; 3092387125fcSChris Mason 3093387125fcSChris Mason bio->bi_end_io = btrfs_end_empty_barrier; 3094387125fcSChris Mason bio->bi_bdev = device->bdev; 3095387125fcSChris Mason init_completion(&device->flush_wait); 3096387125fcSChris Mason bio->bi_private = &device->flush_wait; 3097387125fcSChris Mason device->flush_bio = bio; 3098387125fcSChris Mason 3099387125fcSChris Mason bio_get(bio); 310021adbd5cSStefan Behrens btrfsic_submit_bio(WRITE_FLUSH, bio); 3101387125fcSChris Mason 3102387125fcSChris Mason return 0; 3103387125fcSChris Mason } 3104387125fcSChris Mason 3105387125fcSChris Mason /* 3106387125fcSChris Mason * send an empty flush down to each device in parallel, 3107387125fcSChris Mason * then wait for them 3108387125fcSChris Mason */ 3109387125fcSChris Mason static int barrier_all_devices(struct btrfs_fs_info *info) 3110387125fcSChris Mason { 3111387125fcSChris Mason struct list_head *head; 3112387125fcSChris Mason struct btrfs_device *dev; 31135af3e8ccSStefan Behrens int errors_send = 0; 31145af3e8ccSStefan Behrens int errors_wait = 0; 3115387125fcSChris Mason int ret; 3116387125fcSChris Mason 3117387125fcSChris Mason /* send down all the barriers */ 3118387125fcSChris Mason head = &info->fs_devices->devices; 3119387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3120387125fcSChris Mason if (!dev->bdev) { 31215af3e8ccSStefan Behrens errors_send++; 3122387125fcSChris Mason continue; 3123387125fcSChris Mason } 3124387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3125387125fcSChris Mason continue; 3126387125fcSChris Mason 3127387125fcSChris Mason ret = write_dev_flush(dev, 0); 3128387125fcSChris Mason if (ret) 31295af3e8ccSStefan Behrens errors_send++; 3130387125fcSChris Mason } 3131387125fcSChris Mason 3132387125fcSChris Mason /* wait for all the barriers */ 3133387125fcSChris Mason list_for_each_entry_rcu(dev, head, dev_list) { 3134387125fcSChris Mason if (!dev->bdev) { 31355af3e8ccSStefan Behrens errors_wait++; 3136387125fcSChris Mason continue; 3137387125fcSChris Mason } 3138387125fcSChris Mason if (!dev->in_fs_metadata || !dev->writeable) 3139387125fcSChris Mason continue; 3140387125fcSChris Mason 3141387125fcSChris Mason ret = write_dev_flush(dev, 1); 3142387125fcSChris Mason if (ret) 31435af3e8ccSStefan Behrens errors_wait++; 3144387125fcSChris Mason } 31455af3e8ccSStefan Behrens if (errors_send > info->num_tolerated_disk_barrier_failures || 31465af3e8ccSStefan Behrens errors_wait > info->num_tolerated_disk_barrier_failures) 3147387125fcSChris Mason return -EIO; 3148387125fcSChris Mason return 0; 3149387125fcSChris Mason } 3150387125fcSChris Mason 31515af3e8ccSStefan Behrens int btrfs_calc_num_tolerated_disk_barrier_failures( 31525af3e8ccSStefan Behrens struct btrfs_fs_info *fs_info) 31535af3e8ccSStefan Behrens { 31545af3e8ccSStefan Behrens struct btrfs_ioctl_space_info space; 31555af3e8ccSStefan Behrens struct btrfs_space_info *sinfo; 31565af3e8ccSStefan Behrens u64 types[] = {BTRFS_BLOCK_GROUP_DATA, 31575af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_SYSTEM, 31585af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_METADATA, 31595af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; 31605af3e8ccSStefan Behrens int num_types = 4; 31615af3e8ccSStefan Behrens int i; 31625af3e8ccSStefan Behrens int c; 31635af3e8ccSStefan Behrens int num_tolerated_disk_barrier_failures = 31645af3e8ccSStefan Behrens (int)fs_info->fs_devices->num_devices; 31655af3e8ccSStefan Behrens 31665af3e8ccSStefan Behrens for (i = 0; i < num_types; i++) { 31675af3e8ccSStefan Behrens struct btrfs_space_info *tmp; 31685af3e8ccSStefan Behrens 31695af3e8ccSStefan Behrens sinfo = NULL; 31705af3e8ccSStefan Behrens rcu_read_lock(); 31715af3e8ccSStefan Behrens list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { 31725af3e8ccSStefan Behrens if (tmp->flags == types[i]) { 31735af3e8ccSStefan Behrens sinfo = tmp; 31745af3e8ccSStefan Behrens break; 31755af3e8ccSStefan Behrens } 31765af3e8ccSStefan Behrens } 31775af3e8ccSStefan Behrens rcu_read_unlock(); 31785af3e8ccSStefan Behrens 31795af3e8ccSStefan Behrens if (!sinfo) 31805af3e8ccSStefan Behrens continue; 31815af3e8ccSStefan Behrens 31825af3e8ccSStefan Behrens down_read(&sinfo->groups_sem); 31835af3e8ccSStefan Behrens for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { 31845af3e8ccSStefan Behrens if (!list_empty(&sinfo->block_groups[c])) { 31855af3e8ccSStefan Behrens u64 flags; 31865af3e8ccSStefan Behrens 31875af3e8ccSStefan Behrens btrfs_get_block_group_info( 31885af3e8ccSStefan Behrens &sinfo->block_groups[c], &space); 31895af3e8ccSStefan Behrens if (space.total_bytes == 0 || 31905af3e8ccSStefan Behrens space.used_bytes == 0) 31915af3e8ccSStefan Behrens continue; 31925af3e8ccSStefan Behrens flags = space.flags; 31935af3e8ccSStefan Behrens /* 31945af3e8ccSStefan Behrens * return 31955af3e8ccSStefan Behrens * 0: if dup, single or RAID0 is configured for 31965af3e8ccSStefan Behrens * any of metadata, system or data, else 31975af3e8ccSStefan Behrens * 1: if RAID5 is configured, or if RAID1 or 31985af3e8ccSStefan Behrens * RAID10 is configured and only two mirrors 31995af3e8ccSStefan Behrens * are used, else 32005af3e8ccSStefan Behrens * 2: if RAID6 is configured, else 32015af3e8ccSStefan Behrens * num_mirrors - 1: if RAID1 or RAID10 is 32025af3e8ccSStefan Behrens * configured and more than 32035af3e8ccSStefan Behrens * 2 mirrors are used. 32045af3e8ccSStefan Behrens */ 32055af3e8ccSStefan Behrens if (num_tolerated_disk_barrier_failures > 0 && 32065af3e8ccSStefan Behrens ((flags & (BTRFS_BLOCK_GROUP_DUP | 32075af3e8ccSStefan Behrens BTRFS_BLOCK_GROUP_RAID0)) || 32085af3e8ccSStefan Behrens ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) 32095af3e8ccSStefan Behrens == 0))) 32105af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 0; 321153b381b3SDavid Woodhouse else if (num_tolerated_disk_barrier_failures > 1) { 321253b381b3SDavid Woodhouse if (flags & (BTRFS_BLOCK_GROUP_RAID1 | 321353b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5 | 321453b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID10)) { 32155af3e8ccSStefan Behrens num_tolerated_disk_barrier_failures = 1; 321653b381b3SDavid Woodhouse } else if (flags & 321753b381b3SDavid Woodhouse BTRFS_BLOCK_GROUP_RAID5) { 321853b381b3SDavid Woodhouse num_tolerated_disk_barrier_failures = 2; 321953b381b3SDavid Woodhouse } 322053b381b3SDavid Woodhouse } 32215af3e8ccSStefan Behrens } 32225af3e8ccSStefan Behrens } 32235af3e8ccSStefan Behrens up_read(&sinfo->groups_sem); 32245af3e8ccSStefan Behrens } 32255af3e8ccSStefan Behrens 32265af3e8ccSStefan Behrens return num_tolerated_disk_barrier_failures; 32275af3e8ccSStefan Behrens } 32285af3e8ccSStefan Behrens 3229a512bbf8SYan Zheng int write_all_supers(struct btrfs_root *root, int max_mirrors) 3230f2984462SChris Mason { 3231e5e9a520SChris Mason struct list_head *head; 3232f2984462SChris Mason struct btrfs_device *dev; 3233a061fc8dSChris Mason struct btrfs_super_block *sb; 3234f2984462SChris Mason struct btrfs_dev_item *dev_item; 3235f2984462SChris Mason int ret; 3236f2984462SChris Mason int do_barriers; 3237a236aed1SChris Mason int max_errors; 3238a236aed1SChris Mason int total_errors = 0; 3239a061fc8dSChris Mason u64 flags; 3240f2984462SChris Mason 32416c41761fSDavid Sterba max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; 3242f2984462SChris Mason do_barriers = !btrfs_test_opt(root, NOBARRIER); 3243af31f5e5SChris Mason backup_super_roots(root->fs_info); 3244f2984462SChris Mason 32456c41761fSDavid Sterba sb = root->fs_info->super_for_commit; 3246a061fc8dSChris Mason dev_item = &sb->dev_item; 3247e5e9a520SChris Mason 3248174ba509SChris Mason mutex_lock(&root->fs_info->fs_devices->device_list_mutex); 3249e5e9a520SChris Mason head = &root->fs_info->fs_devices->devices; 3250387125fcSChris Mason 32515af3e8ccSStefan Behrens if (do_barriers) { 32525af3e8ccSStefan Behrens ret = barrier_all_devices(root->fs_info); 32535af3e8ccSStefan Behrens if (ret) { 32545af3e8ccSStefan Behrens mutex_unlock( 32555af3e8ccSStefan Behrens &root->fs_info->fs_devices->device_list_mutex); 32565af3e8ccSStefan Behrens btrfs_error(root->fs_info, ret, 32575af3e8ccSStefan Behrens "errors while submitting device barriers."); 32585af3e8ccSStefan Behrens return ret; 32595af3e8ccSStefan Behrens } 32605af3e8ccSStefan Behrens } 3261387125fcSChris Mason 32621f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3263dfe25020SChris Mason if (!dev->bdev) { 3264dfe25020SChris Mason total_errors++; 3265dfe25020SChris Mason continue; 3266dfe25020SChris Mason } 32672b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3268dfe25020SChris Mason continue; 3269dfe25020SChris Mason 32702b82032cSYan Zheng btrfs_set_stack_device_generation(dev_item, 0); 3271a061fc8dSChris Mason btrfs_set_stack_device_type(dev_item, dev->type); 3272a061fc8dSChris Mason btrfs_set_stack_device_id(dev_item, dev->devid); 3273a061fc8dSChris Mason btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); 3274a061fc8dSChris Mason btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); 3275a061fc8dSChris Mason btrfs_set_stack_device_io_align(dev_item, dev->io_align); 3276a061fc8dSChris Mason btrfs_set_stack_device_io_width(dev_item, dev->io_width); 3277a061fc8dSChris Mason btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); 3278a061fc8dSChris Mason memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); 32792b82032cSYan Zheng memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); 3280a512bbf8SYan Zheng 3281a061fc8dSChris Mason flags = btrfs_super_flags(sb); 3282a061fc8dSChris Mason btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); 3283f2984462SChris Mason 3284a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); 3285a236aed1SChris Mason if (ret) 3286a236aed1SChris Mason total_errors++; 3287f2984462SChris Mason } 3288a236aed1SChris Mason if (total_errors > max_errors) { 3289d397712bSChris Mason printk(KERN_ERR "btrfs: %d errors while writing supers\n", 3290d397712bSChris Mason total_errors); 329179787eaaSJeff Mahoney 329279787eaaSJeff Mahoney /* This shouldn't happen. FUA is masked off if unsupported */ 3293a236aed1SChris Mason BUG(); 3294a236aed1SChris Mason } 3295f2984462SChris Mason 3296a512bbf8SYan Zheng total_errors = 0; 32971f78160cSXiao Guangrong list_for_each_entry_rcu(dev, head, dev_list) { 3298dfe25020SChris Mason if (!dev->bdev) 3299dfe25020SChris Mason continue; 33002b82032cSYan Zheng if (!dev->in_fs_metadata || !dev->writeable) 3301dfe25020SChris Mason continue; 3302dfe25020SChris Mason 3303a512bbf8SYan Zheng ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); 3304a512bbf8SYan Zheng if (ret) 33051259ab75SChris Mason total_errors++; 3306f2984462SChris Mason } 3307174ba509SChris Mason mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); 3308a236aed1SChris Mason if (total_errors > max_errors) { 330979787eaaSJeff Mahoney btrfs_error(root->fs_info, -EIO, 331079787eaaSJeff Mahoney "%d errors while writing supers", total_errors); 331179787eaaSJeff Mahoney return -EIO; 3312a236aed1SChris Mason } 3313f2984462SChris Mason return 0; 3314f2984462SChris Mason } 3315f2984462SChris Mason 3316a512bbf8SYan Zheng int write_ctree_super(struct btrfs_trans_handle *trans, 3317a512bbf8SYan Zheng struct btrfs_root *root, int max_mirrors) 3318cfaa7295SChris Mason { 3319e66f709bSChris Mason int ret; 33202c90e5d6SChris Mason 3321a512bbf8SYan Zheng ret = write_all_supers(root, max_mirrors); 33225f39d397SChris Mason return ret; 3323cfaa7295SChris Mason } 3324cfaa7295SChris Mason 3325143bede5SJeff Mahoney void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) 33262619ba1fSChris Mason { 33274df27c4dSYan, Zheng spin_lock(&fs_info->fs_roots_radix_lock); 33282619ba1fSChris Mason radix_tree_delete(&fs_info->fs_roots_radix, 33292619ba1fSChris Mason (unsigned long)root->root_key.objectid); 33304df27c4dSYan, Zheng spin_unlock(&fs_info->fs_roots_radix_lock); 333176dda93cSYan, Zheng 333276dda93cSYan, Zheng if (btrfs_root_refs(&root->root_item) == 0) 333376dda93cSYan, Zheng synchronize_srcu(&fs_info->subvol_srcu); 333476dda93cSYan, Zheng 3335d7634482SLiu Bo if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { 33363321719eSLiu Bo btrfs_free_log(NULL, root); 33373321719eSLiu Bo btrfs_free_log_root_tree(NULL, fs_info); 33383321719eSLiu Bo } 33393321719eSLiu Bo 3340581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_pinned); 3341581bb050SLi Zefan __btrfs_remove_free_space_cache(root->free_ino_ctl); 33424df27c4dSYan, Zheng free_fs_root(root); 33434df27c4dSYan, Zheng } 33444df27c4dSYan, Zheng 33454df27c4dSYan, Zheng static void free_fs_root(struct btrfs_root *root) 33464df27c4dSYan, Zheng { 334782d5902dSLi Zefan iput(root->cache_inode); 33484df27c4dSYan, Zheng WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); 33490ee5dc67SAl Viro if (root->anon_dev) 33500ee5dc67SAl Viro free_anon_bdev(root->anon_dev); 33515f39d397SChris Mason free_extent_buffer(root->node); 33525f39d397SChris Mason free_extent_buffer(root->commit_root); 3353581bb050SLi Zefan kfree(root->free_ino_ctl); 3354581bb050SLi Zefan kfree(root->free_ino_pinned); 335558176a96SJosef Bacik kfree(root->name); 33562619ba1fSChris Mason kfree(root); 33572619ba1fSChris Mason } 33582619ba1fSChris Mason 3359c146afadSYan Zheng int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) 3360c146afadSYan Zheng { 3361c146afadSYan Zheng u64 root_objectid = 0; 3362c146afadSYan Zheng struct btrfs_root *gang[8]; 3363c146afadSYan Zheng int i; 3364c146afadSYan Zheng int ret; 3365c146afadSYan Zheng 3366c146afadSYan Zheng while (1) { 3367c146afadSYan Zheng ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, 3368c146afadSYan Zheng (void **)gang, root_objectid, 3369c146afadSYan Zheng ARRAY_SIZE(gang)); 3370c146afadSYan Zheng if (!ret) 3371c146afadSYan Zheng break; 33725d4f98a2SYan Zheng 33735d4f98a2SYan Zheng root_objectid = gang[ret - 1]->root_key.objectid + 1; 3374c146afadSYan Zheng for (i = 0; i < ret; i++) { 337566b4ffd1SJosef Bacik int err; 337666b4ffd1SJosef Bacik 3377c146afadSYan Zheng root_objectid = gang[i]->root_key.objectid; 337866b4ffd1SJosef Bacik err = btrfs_orphan_cleanup(gang[i]); 337966b4ffd1SJosef Bacik if (err) 338066b4ffd1SJosef Bacik return err; 3381c146afadSYan Zheng } 3382c146afadSYan Zheng root_objectid++; 3383c146afadSYan Zheng } 3384c146afadSYan Zheng return 0; 3385c146afadSYan Zheng } 3386c146afadSYan Zheng 3387c146afadSYan Zheng int btrfs_commit_super(struct btrfs_root *root) 3388c146afadSYan Zheng { 3389c146afadSYan Zheng struct btrfs_trans_handle *trans; 3390c146afadSYan Zheng int ret; 3391c146afadSYan Zheng 3392c146afadSYan Zheng mutex_lock(&root->fs_info->cleaner_mutex); 339324bbcf04SYan, Zheng btrfs_run_delayed_iputs(root); 3394c146afadSYan Zheng mutex_unlock(&root->fs_info->cleaner_mutex); 33959d1a2a3aSDavid Sterba wake_up_process(root->fs_info->cleaner_kthread); 3396c71bf099SYan, Zheng 3397c71bf099SYan, Zheng /* wait until ongoing cleanup work done */ 3398c71bf099SYan, Zheng down_write(&root->fs_info->cleanup_work_sem); 3399c71bf099SYan, Zheng up_write(&root->fs_info->cleanup_work_sem); 3400c71bf099SYan, Zheng 34017a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 34023612b495STsutomu Itoh if (IS_ERR(trans)) 34033612b495STsutomu Itoh return PTR_ERR(trans); 3404c146afadSYan Zheng ret = btrfs_commit_transaction(trans, root); 340579787eaaSJeff Mahoney if (ret) 340679787eaaSJeff Mahoney return ret; 3407c146afadSYan Zheng /* run commit again to drop the original snapshot */ 34087a7eaa40SJosef Bacik trans = btrfs_join_transaction(root); 34093612b495STsutomu Itoh if (IS_ERR(trans)) 34103612b495STsutomu Itoh return PTR_ERR(trans); 341179787eaaSJeff Mahoney ret = btrfs_commit_transaction(trans, root); 341279787eaaSJeff Mahoney if (ret) 341379787eaaSJeff Mahoney return ret; 3414c146afadSYan Zheng ret = btrfs_write_and_wait_transaction(NULL, root); 341579787eaaSJeff Mahoney if (ret) { 341679787eaaSJeff Mahoney btrfs_error(root->fs_info, ret, 341779787eaaSJeff Mahoney "Failed to sync btree inode to disk."); 341879787eaaSJeff Mahoney return ret; 341979787eaaSJeff Mahoney } 3420c146afadSYan Zheng 3421a512bbf8SYan Zheng ret = write_ctree_super(NULL, root, 0); 3422c146afadSYan Zheng return ret; 3423c146afadSYan Zheng } 3424c146afadSYan Zheng 3425e20d96d6SChris Mason int close_ctree(struct btrfs_root *root) 3426eb60ceacSChris Mason { 34270f7d52f4SChris Mason struct btrfs_fs_info *fs_info = root->fs_info; 3428c146afadSYan Zheng int ret; 3429e089f05cSChris Mason 3430facda1e7SChris Mason fs_info->closing = 1; 3431a2135011SChris Mason smp_mb(); 3432a2135011SChris Mason 3433837d5b6eSIlya Dryomov /* pause restriper - we want to resume on mount */ 3434aa1b8cd4SStefan Behrens btrfs_pause_balance(fs_info); 3435837d5b6eSIlya Dryomov 34368dabb742SStefan Behrens btrfs_dev_replace_suspend_for_unmount(fs_info); 34378dabb742SStefan Behrens 3438aa1b8cd4SStefan Behrens btrfs_scrub_cancel(fs_info); 34394cb5300bSChris Mason 34404cb5300bSChris Mason /* wait for any defraggers to finish */ 34414cb5300bSChris Mason wait_event(fs_info->transaction_wait, 34424cb5300bSChris Mason (atomic_read(&fs_info->defrag_running) == 0)); 34434cb5300bSChris Mason 34444cb5300bSChris Mason /* clear out the rbtree of defraggable inodes */ 344526176e7cSMiao Xie btrfs_cleanup_defrag_inodes(fs_info); 34464cb5300bSChris Mason 3447c146afadSYan Zheng if (!(fs_info->sb->s_flags & MS_RDONLY)) { 3448c146afadSYan Zheng ret = btrfs_commit_super(root); 3449d397712bSChris Mason if (ret) 3450d397712bSChris Mason printk(KERN_ERR "btrfs: commit super ret %d\n", ret); 3451c146afadSYan Zheng } 3452ed2ff2cbSChris Mason 345387533c47SMiao Xie if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) 345468ce9682SStefan Behrens btrfs_error_commit_super(root); 3455acce952bSliubo 3456300e4f8aSJosef Bacik btrfs_put_block_group_cache(fs_info); 3457300e4f8aSJosef Bacik 3458e3029d9fSAl Viro kthread_stop(fs_info->transaction_kthread); 3459e3029d9fSAl Viro kthread_stop(fs_info->cleaner_kthread); 34608929ecfaSYan, Zheng 3461f25784b3SYan Zheng fs_info->closing = 2; 3462f25784b3SYan Zheng smp_mb(); 3463f25784b3SYan Zheng 3464bcef60f2SArne Jansen btrfs_free_qgroup_config(root->fs_info); 3465bcef60f2SArne Jansen 3466963d678bSMiao Xie if (percpu_counter_sum(&fs_info->delalloc_bytes)) { 3467963d678bSMiao Xie printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", 3468963d678bSMiao Xie percpu_counter_sum(&fs_info->delalloc_bytes)); 3469b0c68f8bSChris Mason } 347031153d81SYan Zheng 3471be283b2eSLiu Bo free_root_pointers(fs_info, 1); 3472d20f7043SChris Mason 3473e3029d9fSAl Viro btrfs_free_block_groups(fs_info); 3474c146afadSYan Zheng 34750f7d52f4SChris Mason del_fs_roots(fs_info); 3476d10c5f31SChris Mason 3477c146afadSYan Zheng iput(fs_info->btree_inode); 34789ad6b7bcSChris Mason 34797abadb64SLiu Bo btrfs_stop_all_workers(fs_info); 3480d6bfde87SChris Mason 348121adbd5cSStefan Behrens #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 348221adbd5cSStefan Behrens if (btrfs_test_opt(root, CHECK_INTEGRITY)) 348321adbd5cSStefan Behrens btrfsic_unmount(root, fs_info->fs_devices); 348421adbd5cSStefan Behrens #endif 348521adbd5cSStefan Behrens 3486dfe25020SChris Mason btrfs_close_devices(fs_info->fs_devices); 34870b86a832SChris Mason btrfs_mapping_tree_free(&fs_info->mapping_tree); 3488b248a415SChris Mason 3489e2d84521SMiao Xie percpu_counter_destroy(&fs_info->dirty_metadata_bytes); 3490963d678bSMiao Xie percpu_counter_destroy(&fs_info->delalloc_bytes); 349104160088SChris Mason bdi_destroy(&fs_info->bdi); 349276dda93cSYan, Zheng cleanup_srcu_struct(&fs_info->subvol_srcu); 34930b86a832SChris Mason 349453b381b3SDavid Woodhouse btrfs_free_stripe_hash_table(fs_info); 349553b381b3SDavid Woodhouse 3496eb60ceacSChris Mason return 0; 3497eb60ceacSChris Mason } 3498eb60ceacSChris Mason 3499b9fab919SChris Mason int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, 3500b9fab919SChris Mason int atomic) 3501ccd467d6SChris Mason { 35021259ab75SChris Mason int ret; 3503727011e0SChris Mason struct inode *btree_inode = buf->pages[0]->mapping->host; 35041259ab75SChris Mason 35050b32f4bbSJosef Bacik ret = extent_buffer_uptodate(buf); 35061259ab75SChris Mason if (!ret) 35071259ab75SChris Mason return ret; 35081259ab75SChris Mason 35091259ab75SChris Mason ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, 3510b9fab919SChris Mason parent_transid, atomic); 3511b9fab919SChris Mason if (ret == -EAGAIN) 3512b9fab919SChris Mason return ret; 35131259ab75SChris Mason return !ret; 35145f39d397SChris Mason } 35156702ed49SChris Mason 35165f39d397SChris Mason int btrfs_set_buffer_uptodate(struct extent_buffer *buf) 35175f39d397SChris Mason { 35180b32f4bbSJosef Bacik return set_extent_buffer_uptodate(buf); 35195f39d397SChris Mason } 35205f39d397SChris Mason 35215f39d397SChris Mason void btrfs_mark_buffer_dirty(struct extent_buffer *buf) 35225f39d397SChris Mason { 3523727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 35245f39d397SChris Mason u64 transid = btrfs_header_generation(buf); 3525b9473439SChris Mason int was_dirty; 3526b4ce94deSChris Mason 3527b9447ef8SChris Mason btrfs_assert_tree_locked(buf); 352831b1a2bdSJulia Lawall if (transid != root->fs_info->generation) 352931b1a2bdSJulia Lawall WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " 3530d397712bSChris Mason "found %llu running %llu\n", 3531db94535dSChris Mason (unsigned long long)buf->start, 3532d397712bSChris Mason (unsigned long long)transid, 3533d397712bSChris Mason (unsigned long long)root->fs_info->generation); 35340b32f4bbSJosef Bacik was_dirty = set_extent_buffer_dirty(buf); 3535e2d84521SMiao Xie if (!was_dirty) 3536e2d84521SMiao Xie __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, 3537e2d84521SMiao Xie buf->len, 3538e2d84521SMiao Xie root->fs_info->dirty_metadata_batch); 3539eb60ceacSChris Mason } 3540eb60ceacSChris Mason 3541b53d3f5dSLiu Bo static void __btrfs_btree_balance_dirty(struct btrfs_root *root, 3542b53d3f5dSLiu Bo int flush_delayed) 354335b7e476SChris Mason { 3544188de649SChris Mason /* 3545188de649SChris Mason * looks as though older kernels can get into trouble with 3546188de649SChris Mason * this code, they end up stuck in balance_dirty_pages forever 3547188de649SChris Mason */ 3548e2d84521SMiao Xie int ret; 3549d6bfde87SChris Mason 35506933c02eSJens Axboe if (current->flags & PF_MEMALLOC) 3551d6bfde87SChris Mason return; 3552d6bfde87SChris Mason 3553b53d3f5dSLiu Bo if (flush_delayed) 355416cdcec7SMiao Xie btrfs_balance_delayed_items(root); 355516cdcec7SMiao Xie 3556e2d84521SMiao Xie ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, 3557e2d84521SMiao Xie BTRFS_DIRTY_METADATA_THRESH); 3558e2d84521SMiao Xie if (ret > 0) { 3559d0e1d66bSNamjae Jeon balance_dirty_pages_ratelimited( 3560d0e1d66bSNamjae Jeon root->fs_info->btree_inode->i_mapping); 356116cdcec7SMiao Xie } 356216cdcec7SMiao Xie return; 356316cdcec7SMiao Xie } 356416cdcec7SMiao Xie 3565b53d3f5dSLiu Bo void btrfs_btree_balance_dirty(struct btrfs_root *root) 356616cdcec7SMiao Xie { 3567b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 1); 356835b7e476SChris Mason } 3569b53d3f5dSLiu Bo 3570b53d3f5dSLiu Bo void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) 3571b53d3f5dSLiu Bo { 3572b53d3f5dSLiu Bo __btrfs_btree_balance_dirty(root, 0); 3573d6bfde87SChris Mason } 35746b80053dSChris Mason 3575ca7a79adSChris Mason int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) 35766b80053dSChris Mason { 3577727011e0SChris Mason struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; 35780b32f4bbSJosef Bacik return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); 35796b80053dSChris Mason } 35800da5468fSChris Mason 3581fcd1f065SDavid Sterba static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, 3582acce952bSliubo int read_only) 3583acce952bSliubo { 3584fcd1f065SDavid Sterba if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) { 3585fcd1f065SDavid Sterba printk(KERN_ERR "btrfs: unsupported checksum algorithm\n"); 3586fcd1f065SDavid Sterba return -EINVAL; 3587fcd1f065SDavid Sterba } 3588acce952bSliubo 3589fcd1f065SDavid Sterba if (read_only) 3590fcd1f065SDavid Sterba return 0; 3591fcd1f065SDavid Sterba 3592fcd1f065SDavid Sterba return 0; 3593fcd1f065SDavid Sterba } 3594fcd1f065SDavid Sterba 359568ce9682SStefan Behrens void btrfs_error_commit_super(struct btrfs_root *root) 3596acce952bSliubo { 3597acce952bSliubo mutex_lock(&root->fs_info->cleaner_mutex); 3598acce952bSliubo btrfs_run_delayed_iputs(root); 3599acce952bSliubo mutex_unlock(&root->fs_info->cleaner_mutex); 3600acce952bSliubo 3601acce952bSliubo down_write(&root->fs_info->cleanup_work_sem); 3602acce952bSliubo up_write(&root->fs_info->cleanup_work_sem); 3603acce952bSliubo 3604acce952bSliubo /* cleanup FS via transaction */ 3605acce952bSliubo btrfs_cleanup_transaction(root); 3606acce952bSliubo } 3607acce952bSliubo 3608569e0f35SJosef Bacik static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, 3609569e0f35SJosef Bacik struct btrfs_root *root) 3610acce952bSliubo { 3611acce952bSliubo struct btrfs_inode *btrfs_inode; 3612acce952bSliubo struct list_head splice; 3613acce952bSliubo 3614acce952bSliubo INIT_LIST_HEAD(&splice); 3615acce952bSliubo 3616acce952bSliubo mutex_lock(&root->fs_info->ordered_operations_mutex); 3617acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3618acce952bSliubo 3619569e0f35SJosef Bacik list_splice_init(&t->ordered_operations, &splice); 3620acce952bSliubo while (!list_empty(&splice)) { 3621acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3622acce952bSliubo ordered_operations); 3623acce952bSliubo 3624acce952bSliubo list_del_init(&btrfs_inode->ordered_operations); 3625acce952bSliubo 3626acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3627acce952bSliubo } 3628acce952bSliubo 3629acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3630acce952bSliubo mutex_unlock(&root->fs_info->ordered_operations_mutex); 3631acce952bSliubo } 3632acce952bSliubo 3633143bede5SJeff Mahoney static void btrfs_destroy_ordered_extents(struct btrfs_root *root) 3634acce952bSliubo { 3635acce952bSliubo struct btrfs_ordered_extent *ordered; 3636acce952bSliubo 3637acce952bSliubo spin_lock(&root->fs_info->ordered_extent_lock); 3638779880efSJosef Bacik /* 3639779880efSJosef Bacik * This will just short circuit the ordered completion stuff which will 3640779880efSJosef Bacik * make sure the ordered extent gets properly cleaned up. 3641779880efSJosef Bacik */ 3642779880efSJosef Bacik list_for_each_entry(ordered, &root->fs_info->ordered_extents, 3643779880efSJosef Bacik root_extent_list) 3644779880efSJosef Bacik set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); 3645acce952bSliubo spin_unlock(&root->fs_info->ordered_extent_lock); 3646acce952bSliubo } 3647acce952bSliubo 364879787eaaSJeff Mahoney int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, 3649acce952bSliubo struct btrfs_root *root) 3650acce952bSliubo { 3651acce952bSliubo struct rb_node *node; 3652acce952bSliubo struct btrfs_delayed_ref_root *delayed_refs; 3653acce952bSliubo struct btrfs_delayed_ref_node *ref; 3654acce952bSliubo int ret = 0; 3655acce952bSliubo 3656acce952bSliubo delayed_refs = &trans->delayed_refs; 3657acce952bSliubo 3658acce952bSliubo spin_lock(&delayed_refs->lock); 3659acce952bSliubo if (delayed_refs->num_entries == 0) { 3660cfece4dbSDavid Sterba spin_unlock(&delayed_refs->lock); 3661acce952bSliubo printk(KERN_INFO "delayed_refs has NO entry\n"); 3662acce952bSliubo return ret; 3663acce952bSliubo } 3664acce952bSliubo 3665b939d1abSJosef Bacik while ((node = rb_first(&delayed_refs->root)) != NULL) { 3666eb12db69SJosef Bacik struct btrfs_delayed_ref_head *head = NULL; 3667acce952bSliubo 3668eb12db69SJosef Bacik ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); 3669acce952bSliubo atomic_set(&ref->refs, 1); 3670acce952bSliubo if (btrfs_delayed_ref_is_head(ref)) { 3671acce952bSliubo 3672acce952bSliubo head = btrfs_delayed_node_to_head(ref); 3673b939d1abSJosef Bacik if (!mutex_trylock(&head->mutex)) { 3674b939d1abSJosef Bacik atomic_inc(&ref->refs); 367579787eaaSJeff Mahoney spin_unlock(&delayed_refs->lock); 3676b939d1abSJosef Bacik 3677b939d1abSJosef Bacik /* Need to wait for the delayed ref to run */ 3678acce952bSliubo mutex_lock(&head->mutex); 3679b939d1abSJosef Bacik mutex_unlock(&head->mutex); 3680b939d1abSJosef Bacik btrfs_put_delayed_ref(ref); 3681b939d1abSJosef Bacik 3682e18fca73SJosef Bacik spin_lock(&delayed_refs->lock); 3683b939d1abSJosef Bacik continue; 3684b939d1abSJosef Bacik } 3685b939d1abSJosef Bacik 368654067ae9SJosef Bacik if (head->must_insert_reserved) 368754067ae9SJosef Bacik btrfs_pin_extent(root, ref->bytenr, 368854067ae9SJosef Bacik ref->num_bytes, 1); 368978a6184aSMiao Xie btrfs_free_delayed_extent_op(head->extent_op); 3690acce952bSliubo delayed_refs->num_heads--; 3691acce952bSliubo if (list_empty(&head->cluster)) 3692acce952bSliubo delayed_refs->num_heads_ready--; 3693acce952bSliubo list_del_init(&head->cluster); 3694acce952bSliubo } 3695eb12db69SJosef Bacik 3696b939d1abSJosef Bacik ref->in_tree = 0; 3697b939d1abSJosef Bacik rb_erase(&ref->rb_node, &delayed_refs->root); 3698b939d1abSJosef Bacik delayed_refs->num_entries--; 3699eb12db69SJosef Bacik if (head) 3700eb12db69SJosef Bacik mutex_unlock(&head->mutex); 3701acce952bSliubo spin_unlock(&delayed_refs->lock); 3702acce952bSliubo btrfs_put_delayed_ref(ref); 3703acce952bSliubo 3704acce952bSliubo cond_resched(); 3705acce952bSliubo spin_lock(&delayed_refs->lock); 3706acce952bSliubo } 3707acce952bSliubo 3708acce952bSliubo spin_unlock(&delayed_refs->lock); 3709acce952bSliubo 3710acce952bSliubo return ret; 3711acce952bSliubo } 3712acce952bSliubo 3713aec8030aSMiao Xie static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t) 3714acce952bSliubo { 3715acce952bSliubo struct btrfs_pending_snapshot *snapshot; 3716acce952bSliubo struct list_head splice; 3717acce952bSliubo 3718acce952bSliubo INIT_LIST_HEAD(&splice); 3719acce952bSliubo 3720acce952bSliubo list_splice_init(&t->pending_snapshots, &splice); 3721acce952bSliubo 3722acce952bSliubo while (!list_empty(&splice)) { 3723acce952bSliubo snapshot = list_entry(splice.next, 3724acce952bSliubo struct btrfs_pending_snapshot, 3725acce952bSliubo list); 3726aec8030aSMiao Xie snapshot->error = -ECANCELED; 3727acce952bSliubo list_del_init(&snapshot->list); 3728acce952bSliubo } 3729acce952bSliubo } 3730acce952bSliubo 3731143bede5SJeff Mahoney static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) 3732acce952bSliubo { 3733acce952bSliubo struct btrfs_inode *btrfs_inode; 3734acce952bSliubo struct list_head splice; 3735acce952bSliubo 3736acce952bSliubo INIT_LIST_HEAD(&splice); 3737acce952bSliubo 3738acce952bSliubo spin_lock(&root->fs_info->delalloc_lock); 37395be76758SDavid Sterba list_splice_init(&root->fs_info->delalloc_inodes, &splice); 3740acce952bSliubo 3741acce952bSliubo while (!list_empty(&splice)) { 3742acce952bSliubo btrfs_inode = list_entry(splice.next, struct btrfs_inode, 3743acce952bSliubo delalloc_inodes); 3744acce952bSliubo 3745acce952bSliubo list_del_init(&btrfs_inode->delalloc_inodes); 3746df0af1a5SMiao Xie clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, 3747df0af1a5SMiao Xie &btrfs_inode->runtime_flags); 3748acce952bSliubo 3749acce952bSliubo btrfs_invalidate_inodes(btrfs_inode->root); 3750acce952bSliubo } 3751acce952bSliubo 3752acce952bSliubo spin_unlock(&root->fs_info->delalloc_lock); 3753acce952bSliubo } 3754acce952bSliubo 3755acce952bSliubo static int btrfs_destroy_marked_extents(struct btrfs_root *root, 3756acce952bSliubo struct extent_io_tree *dirty_pages, 3757acce952bSliubo int mark) 3758acce952bSliubo { 3759acce952bSliubo int ret; 3760acce952bSliubo struct extent_buffer *eb; 3761acce952bSliubo u64 start = 0; 3762acce952bSliubo u64 end; 3763acce952bSliubo 3764acce952bSliubo while (1) { 3765acce952bSliubo ret = find_first_extent_bit(dirty_pages, start, &start, &end, 3766e6138876SJosef Bacik mark, NULL); 3767acce952bSliubo if (ret) 3768acce952bSliubo break; 3769acce952bSliubo 3770acce952bSliubo clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); 3771acce952bSliubo while (start <= end) { 3772fd8b2b61SJosef Bacik eb = btrfs_find_tree_block(root, start, 3773fd8b2b61SJosef Bacik root->leafsize); 3774fd8b2b61SJosef Bacik start += eb->len; 3775fd8b2b61SJosef Bacik if (!eb) 3776acce952bSliubo continue; 3777fd8b2b61SJosef Bacik wait_on_extent_buffer_writeback(eb); 3778acce952bSliubo 3779fd8b2b61SJosef Bacik if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, 3780fd8b2b61SJosef Bacik &eb->bflags)) 3781fd8b2b61SJosef Bacik clear_extent_buffer_dirty(eb); 3782fd8b2b61SJosef Bacik free_extent_buffer_stale(eb); 3783acce952bSliubo } 3784acce952bSliubo } 3785acce952bSliubo 3786acce952bSliubo return ret; 3787acce952bSliubo } 3788acce952bSliubo 3789acce952bSliubo static int btrfs_destroy_pinned_extent(struct btrfs_root *root, 3790acce952bSliubo struct extent_io_tree *pinned_extents) 3791acce952bSliubo { 3792acce952bSliubo struct extent_io_tree *unpin; 3793acce952bSliubo u64 start; 3794acce952bSliubo u64 end; 3795acce952bSliubo int ret; 3796ed0eaa14SLiu Bo bool loop = true; 3797acce952bSliubo 3798acce952bSliubo unpin = pinned_extents; 3799ed0eaa14SLiu Bo again: 3800acce952bSliubo while (1) { 3801acce952bSliubo ret = find_first_extent_bit(unpin, 0, &start, &end, 3802e6138876SJosef Bacik EXTENT_DIRTY, NULL); 3803acce952bSliubo if (ret) 3804acce952bSliubo break; 3805acce952bSliubo 3806acce952bSliubo /* opt_discard */ 38075378e607SLi Dongyang if (btrfs_test_opt(root, DISCARD)) 38085378e607SLi Dongyang ret = btrfs_error_discard_extent(root, start, 38095378e607SLi Dongyang end + 1 - start, 38105378e607SLi Dongyang NULL); 3811acce952bSliubo 3812acce952bSliubo clear_extent_dirty(unpin, start, end, GFP_NOFS); 3813acce952bSliubo btrfs_error_unpin_extent_range(root, start, end); 3814acce952bSliubo cond_resched(); 3815acce952bSliubo } 3816acce952bSliubo 3817ed0eaa14SLiu Bo if (loop) { 3818ed0eaa14SLiu Bo if (unpin == &root->fs_info->freed_extents[0]) 3819ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[1]; 3820ed0eaa14SLiu Bo else 3821ed0eaa14SLiu Bo unpin = &root->fs_info->freed_extents[0]; 3822ed0eaa14SLiu Bo loop = false; 3823ed0eaa14SLiu Bo goto again; 3824ed0eaa14SLiu Bo } 3825ed0eaa14SLiu Bo 3826acce952bSliubo return 0; 3827acce952bSliubo } 3828acce952bSliubo 382949b25e05SJeff Mahoney void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, 383049b25e05SJeff Mahoney struct btrfs_root *root) 383149b25e05SJeff Mahoney { 383249b25e05SJeff Mahoney btrfs_destroy_delayed_refs(cur_trans, root); 383349b25e05SJeff Mahoney btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, 383449b25e05SJeff Mahoney cur_trans->dirty_pages.dirty_bytes); 383549b25e05SJeff Mahoney 383649b25e05SJeff Mahoney /* FIXME: cleanup wait for commit */ 383749b25e05SJeff Mahoney cur_trans->in_commit = 1; 383849b25e05SJeff Mahoney cur_trans->blocked = 1; 383949b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_blocked_wait); 384049b25e05SJeff Mahoney 3841aec8030aSMiao Xie btrfs_evict_pending_snapshots(cur_trans); 3842aec8030aSMiao Xie 384349b25e05SJeff Mahoney cur_trans->blocked = 0; 384449b25e05SJeff Mahoney wake_up(&root->fs_info->transaction_wait); 384549b25e05SJeff Mahoney 384649b25e05SJeff Mahoney cur_trans->commit_done = 1; 384749b25e05SJeff Mahoney wake_up(&cur_trans->commit_wait); 384849b25e05SJeff Mahoney 384967cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 385067cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 385167cde344SMiao Xie 385249b25e05SJeff Mahoney btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, 385349b25e05SJeff Mahoney EXTENT_DIRTY); 38546e841e32SLiu Bo btrfs_destroy_pinned_extent(root, 38556e841e32SLiu Bo root->fs_info->pinned_extents); 385649b25e05SJeff Mahoney 385749b25e05SJeff Mahoney /* 385849b25e05SJeff Mahoney memset(cur_trans, 0, sizeof(*cur_trans)); 385949b25e05SJeff Mahoney kmem_cache_free(btrfs_transaction_cachep, cur_trans); 386049b25e05SJeff Mahoney */ 386149b25e05SJeff Mahoney } 386249b25e05SJeff Mahoney 386349b25e05SJeff Mahoney int btrfs_cleanup_transaction(struct btrfs_root *root) 3864acce952bSliubo { 3865acce952bSliubo struct btrfs_transaction *t; 3866acce952bSliubo LIST_HEAD(list); 3867acce952bSliubo 3868acce952bSliubo mutex_lock(&root->fs_info->transaction_kthread_mutex); 3869acce952bSliubo 3870a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3871acce952bSliubo list_splice_init(&root->fs_info->trans_list, &list); 3872a4abeea4SJosef Bacik root->fs_info->trans_no_join = 1; 3873a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3874a4abeea4SJosef Bacik 3875acce952bSliubo while (!list_empty(&list)) { 3876acce952bSliubo t = list_entry(list.next, struct btrfs_transaction, list); 3877acce952bSliubo 3878569e0f35SJosef Bacik btrfs_destroy_ordered_operations(t, root); 3879acce952bSliubo 3880acce952bSliubo btrfs_destroy_ordered_extents(root); 3881acce952bSliubo 3882acce952bSliubo btrfs_destroy_delayed_refs(t, root); 3883acce952bSliubo 3884acce952bSliubo /* FIXME: cleanup wait for commit */ 3885acce952bSliubo t->in_commit = 1; 3886acce952bSliubo t->blocked = 1; 388766657b31SJosef Bacik smp_mb(); 3888acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) 3889acce952bSliubo wake_up(&root->fs_info->transaction_blocked_wait); 3890acce952bSliubo 3891aec8030aSMiao Xie btrfs_evict_pending_snapshots(t); 3892aec8030aSMiao Xie 3893acce952bSliubo t->blocked = 0; 389466657b31SJosef Bacik smp_mb(); 3895acce952bSliubo if (waitqueue_active(&root->fs_info->transaction_wait)) 3896acce952bSliubo wake_up(&root->fs_info->transaction_wait); 3897acce952bSliubo 3898acce952bSliubo t->commit_done = 1; 389966657b31SJosef Bacik smp_mb(); 3900acce952bSliubo if (waitqueue_active(&t->commit_wait)) 3901acce952bSliubo wake_up(&t->commit_wait); 3902acce952bSliubo 390367cde344SMiao Xie btrfs_destroy_delayed_inodes(root); 390467cde344SMiao Xie btrfs_assert_delayed_root_empty(root); 390567cde344SMiao Xie 3906acce952bSliubo btrfs_destroy_delalloc_inodes(root); 3907acce952bSliubo 3908a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3909acce952bSliubo root->fs_info->running_transaction = NULL; 3910a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3911acce952bSliubo 3912acce952bSliubo btrfs_destroy_marked_extents(root, &t->dirty_pages, 3913acce952bSliubo EXTENT_DIRTY); 3914acce952bSliubo 3915acce952bSliubo btrfs_destroy_pinned_extent(root, 3916acce952bSliubo root->fs_info->pinned_extents); 3917acce952bSliubo 391813c5a93eSJosef Bacik atomic_set(&t->use_count, 0); 3919acce952bSliubo list_del_init(&t->list); 3920acce952bSliubo memset(t, 0, sizeof(*t)); 3921acce952bSliubo kmem_cache_free(btrfs_transaction_cachep, t); 3922acce952bSliubo } 3923acce952bSliubo 3924a4abeea4SJosef Bacik spin_lock(&root->fs_info->trans_lock); 3925a4abeea4SJosef Bacik root->fs_info->trans_no_join = 0; 3926a4abeea4SJosef Bacik spin_unlock(&root->fs_info->trans_lock); 3927acce952bSliubo mutex_unlock(&root->fs_info->transaction_kthread_mutex); 3928acce952bSliubo 3929acce952bSliubo return 0; 3930acce952bSliubo } 3931acce952bSliubo 3932d1310b2eSChris Mason static struct extent_io_ops btree_extent_io_ops = { 3933ce9adaa5SChris Mason .readpage_end_io_hook = btree_readpage_end_io_hook, 39344bb31e92SArne Jansen .readpage_io_failed_hook = btree_io_failed_hook, 39350b86a832SChris Mason .submit_bio_hook = btree_submit_bio_hook, 3936239b14b3SChris Mason /* note we're sharing with inode.c for the merge bio hook */ 3937239b14b3SChris Mason .merge_bio_hook = btrfs_merge_bio_hook, 39380da5468fSChris Mason }; 3939